DAMPING MEMBER, CLEANING DEVICE, AND SUCTION HEAD

Abstract

A damping member is for damping vibration of a cleaning device including a first member and a second member. The damping member includes: a first contact surface that is in contact with the first member and a second contact surface that is in contact with the second member. The first contact surface includes at least two contact surfaces facing in directions different from each other.

Claims

1. A damping member for damping vibration of a cleaning device including a first member and a second member, the damping member comprising: a first contact surface that is in contact with the first member; a second contact surface that is in contact with the second member, wherein the first contact surface includes at least two contact surfaces facing in directions different from each other.

2. The damping member according to claim 1, wherein the second contact surface includes at least two contact surfaces facing in directions different from each other.

3. The damping member according to claim 1, comprising a tubular portion, wherein the first contact surface includes an outer surface of the tubular portion, and the second contact surface includes an inner surface of the tubular portion.

4. The damping member according to claim 3, wherein the second contact surface includes one or both of an upper surface and a lower surface of the damping member.

5. The damping member according to claim 1, wherein the damping member has an opening in which at least a part of the second member is disposed.

6. The damping member according to claim 1, comprising: a tubular portion; a first flange portion connected to one end portion of the tubular portion; and a second flange portion connected to another end portion of the tubular portion, wherein the first contact surface includes an outer surface of the tubular portion, a first surface of the first flange portion, and a second surface of the second flange portion, and the second contact surface includes an inner surface of the tubular portion, a third surface of the first flange portion, and a fourth surface of the second flange portion.

7. The damping member according to claim 6, wherein one or both of the first flange portion and the second flange portion include a plurality of grooves provided at intervals in a circumferential direction.

8. The damping member according to claim 1, comprising: one surface; an other surface facing in a direction opposite to a direction in which the one surface faces; a first recess provided on the one surface; and a second recess provided on the other surface, wherein the first contact surface includes a bottom surface of the first recess and an inner side surface of the first recess, and the second contact surface includes a bottom surface of the second recess and an inner side surface of the second recess.

9. The damping member according to claim 1, wherein the damping member is disposed around a fixing member that fixes the first member and the second member.

10. A cleaning device comprising: a housing including a suction port; a brush disposed in the suction port; a drive unit that rotates the brush; a case that supports at least a part of the drive unit; and the damping member according to claim 1, wherein the first member includes the case, and the second member includes the housing.

11. The cleaning device according to claim 10, wherein the drive unit includes: a motor; and a gear that transmits a rotational force generated by the motor to the brush, and the case supports the gear.

12. The cleaning device according to claim 10, wherein the drive unit includes a motor, and the case supports the motor.

13. The cleaning device according to claim 10, wherein the damping member includes a tubular portion, the case includes a holding portion disposed around the tubular portion, and the housing includes a protruding portion inserted into the tubular portion.

14. A cleaning device comprising: a housing including a suction port; a brush disposed in the suction port; a drive unit that rotates the brush; and the damping member according to claim 1, wherein the drive unit includes: a motor; an output shaft coupled to the motor; and a relay shaft coupled to the brush, the first member includes the output shaft, and the second member includes the relay shaft.

15. The cleaning device according to claim 14, wherein the damping member includes: one surface; an other surface facing in a direction opposite to a direction in which the one surface faces; a first recess provided on the one surface; and a second recess provided on the other surface, the output shaft includes a first cam portion inserted into the first recess, and the relay shaft includes a second cam portion inserted into the second recess.

16. A suction head of a cleaning device, the suction head comprising: a housing including a suction port; a brush disposed in the suction port; a power transmission mechanism that transmits a rotational force generated by a motor to the brush; a case that supports the power transmission mechanism; and the damping member according to claim 1, wherein the first member includes the case, and the second member includes the housing.

17. The suction head according to claim 16, wherein the power transmission mechanism includes a gear, and the case supports the gear.

18. The suction head according to claim 16, wherein the power transmission mechanism includes a pulley and a belt wound on the pulley, and the case supports the pulley.

19. The suction head according to claim 16, comprising a screw that fixes the first member and the second member, wherein the damping member is disposed around the screw.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is a perspective view from the left front illustrating a cleaning device according to a first embodiment;

[0009] FIG. 2 is a perspective view from the right rear illustrating the cleaning device according to the first embodiment;

[0010] FIG. 3 is a front view illustrating the cleaning device according to the first embodiment;

[0011] FIG. 4 is a top view illustrating the cleaning device according to the first embodiment;

[0012] FIG. 5 is a bottom view illustrating the cleaning device according to the first embodiment;

[0013] FIG. 6 is a cross-sectional view illustrating the cleaning device according to the first embodiment;

[0014] FIG. 7 is a cross-sectional view illustrating the cleaning device according to the first embodiment;

[0015] FIG. 8 is a cross-sectional view illustrating the cleaning device according to the first embodiment;

[0016] FIG. 9 is a cross-sectional view illustrating a part of the cleaning device according to the first embodiment;

[0017] FIG. 10 is a perspective view from the left front illustrating a suction head according to the first embodiment;

[0018] FIG. 11 is a perspective view from the left front illustrating a battery attachment portion according to the first embodiment;

[0019] FIG. 12 is a perspective view from the left front illustrating the inside of the suction head according to the first embodiment;

[0020] FIG. 13 is a perspective view from the left front illustrating a part of the inside of the suction head according to the first embodiment;

[0021] FIG. 14 is a front view illustrating a part of the inside of the suction head according to the first embodiment;

[0022] FIG. 15 is a perspective view from the left front illustrating a power transmission mechanism according to the first embodiment;

[0023] FIG. 16 is an exploded perspective view from the left front from the left front illustrating a part of the inside of the suction head according to the first embodiment;

[0024] FIG. 17 is a cross-sectional view illustrating a part of the suction head according to the first embodiment;

[0025] FIG. 18 is a cross-sectional view illustrating a part of the suction head according to the first embodiment;

[0026] FIG. 19 is a cross-sectional view illustrating a part of the suction head according to the first embodiment;

[0027] FIG. 20 is a cross-sectional view illustrating the vicinity of a first damping member according to the first embodiment;

[0028] FIG. 21 is a perspective view illustrating the first damping member according to the first embodiment;

[0029] FIG. 22 is a side view illustrating the first damping member according to the first embodiment;

[0030] FIG. 23 is a side view illustrating a second damping member according to the first embodiment;

[0031] FIG. 24 is a perspective view from the left front illustrating a suction head according to a second embodiment;

[0032] FIG. 25 is a perspective view from the left front illustrating the inside of the suction head according to a second embodiment;

[0033] FIG. 26 is a cross-sectional view from the left front illustrating the inside of the suction head according to the second embodiment;

[0034] FIG. 27 is a cross-sectional view from the left front illustrating the inside of the suction head according to the second embodiment;

[0035] FIG. 28 is a cross-sectional view from the left front illustrating the inside of the suction head according to the second embodiment;

[0036] FIG. 29 is a perspective view from the left front illustrating a part of the inside of the suction head according to the second embodiment;

[0037] FIG. 30 is an exploded perspective view from the left front illustrating a part of the inside of the suction head according to the second embodiment;

[0038] FIG. 31 is a front view illustrating a part of the inside of the suction head according to the second embodiment;

[0039] FIG. 32 is a cross-sectional view illustrating a part of the suction head according to the second embodiment;

[0040] FIG. 33 is a cross-sectional view illustrating a part of the suction head according to the second embodiment;

[0041] FIG. 34 is a cross-sectional view illustrating the vicinity of a damping member according to the second embodiment;

[0042] FIG. 35 is a perspective view illustrating the damping member according to the second embodiment;

[0043] FIG. 36 is a side view illustrating the damping member according to the second embodiment;

[0044] FIG. 37 is a perspective view from the left front illustrating a part of the inside of a suction head according to a third embodiment;

[0045] FIG. 38 is an exploded perspective view from the left front illustrating a part of the inside of the suction head according to the third embodiment;

[0046] FIG. 39 is a cross-sectional view illustrating a part of the suction head according to the third embodiment;

[0047] FIG. 40 is a perspective view from the left front illustrating a rotor shaft, an output shaft, a damping member, and a relay shaft according to the third embodiment;

[0048] FIG. 41 is an exploded perspective view from the left front illustrating the rotor shaft, the output shaft, the damping member, and the relay shaft according to the third embodiment;

[0049] FIG. 42 is a perspective view from the left rear illustrating the rotor shaft, the output shaft, the damping member, and the relay shaft according to the third embodiment;

[0050] FIG. 43 is a right view of the relay shaft according to the third embodiment;

[0051] FIG. 44 is a perspective view from the right rear illustrating the damping member according to the third embodiment;

[0052] FIG. 45 is a right view of the damping member according to the third; and

[0053] FIG. 46 is an exploded perspective view from the left front illustrating a case according to a fourth embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] In one or more embodiments, a damping member may damp vibrations of a cleaning device including a first member and a second member. The damping member may include a first contact surface that is in contact with the first member and a second contact surface that is in contact with the second member. The first contact surface may include at least two contact surfaces facing in directions different from each other.

[0055] In the configuration explained above, since the first contact surface includes the at least two contact surfaces facing in the directions different from each other, a contact area between the damping member and the first member increases. Therefore, the damping member can effectively damp vibration. Since the vibration is damped, noise generated from the cleaning device is reduced.

[0056] When the first member is a vibration source, the damping member can damp vibration transmitted from the first member to the second member. Since vibration of the second member is reduced, noise generated from the cleaning device is reduced. Since the first contact surface includes the at least two contact surfaces facing in the directions different from each other, even if the first member vibrates in different directions, the damping member can effectively damp vibrations of the first member in a plurality of vibration directions. Since vibration of the second member is reduced, noise generated from the cleaning device is reduced.

[0057] When the second member is a vibration source, the damping member can damp vibration transmitted from the second member to the first member. Since the vibration of the first member is reduced, noise generated from the cleaning device is reduced. Since the first contact surface includes the at least two contact surfaces facing in the directions different from each other, the damping member can effectively damp vibrations in a plurality of vibration directions input to the first member even if the directions of vibrations input to the first member are different from one another. Since the vibration of the first member is reduced, noise generated from the cleaning device is reduced.

[0058] In the one or more embodiments, the second contact surface may include at least two contact surfaces facing in directions different from each other.

[0059] In the configuration explained above, when the first member is a vibration source, since the second contact surface includes the at least two contact surfaces facing in the directions different from each other, the damping member can effectively damp vibrations in a plurality of vibration directions even if the directions of vibrations input to the second member are different from one another. When the second member is a vibration source, since the second contact surface includes the at least two contact surfaces facing in the directions different from each other, the damping member can effectively damp vibrations in a plurality of vibration directions even if the second member vibrates in different directions.

[0060] In the one or more embodiments, the damping member may comprise a tubular portion. The first contact surface may include the outer surface of the tubular portion. The second contact surface may include the inner surface of the tubular portion.

[0061] In the configuration explained above, when the first member is in contact with the outer surface of the tubular portion and the second member is in contact with the inner surface of the tubular portion, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0062] In the one or more embodiments, the second contact surface may include one or both of the upper surface and the lower surface of the damping member.

[0063] In the configuration explained above, when the second member is in contact with one or both of the upper surface and the lower surface of the damping member, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0064] In the one or more embodiments, the damping member may include an opening in which at least a portion of the second member is disposed.

[0065] In the configuration explained above, when at least a part of the second member is disposed in the opening of the damping member, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0066] In the one or more embodiments, the damping member may include a tubular portion, a first flange portion connected to one end portion of the tubular portion, and a second flange portion connected to another end portion of the tubular portion. The first contact surface may include the outer surface of the tubular portion, a first surface of the first flange portion, and a second surface of the second flange portion. The second contact surface may include the inner surface of the tubular portion, a third surface of the first flange portion, and a fourth surface of the second flange portion.

[0067] In the configuration explained above, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0068] In the one or more embodiments, one or both of the first flange portion and the second flange portion may include a plurality of grooves provided at intervals in the circumferential direction.

[0069] In the configuration explained above, when the grooves are provided in the first flange portion, the first flange portion is easily bent and deformed by the grooves. Therefore, the damping member can effectively damp vibration. When the damping member is inserted into the opening provided in the first member or the second member, the first flange portion is easily bent and deformed. Therefore, the damping member is easily inserted into the opening. The same applies when the grooves are provided in the second flange portion.

[0070] In the one or more embodiments, the damping member may include one surface, another surface facing a direction opposite to a direction in which the one surface faces, a first recess provided on the one surface, and a second recess provided on the other surface. The first contact surface may include a bottom surface of the first recess and an inner side surface of the first recess. The second contact surface may include a bottom surface of the second recess and an inner side surface of the second recess.

[0071] In the configuration explained above, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member. The damping member can transmit a rotational force of the first member to the second member while allowing a change in relative positions of the first member and the second member.

[0072] In the one or more embodiments, the damping member may be disposed around a fixing member that fixes the first member and the second member.

[0073] In the configuration explained above, in a state in which the first member and the second member are fixed by the fixing member, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0074] In the one or more embodiments, the cleaning device may include a housing including a suction port, a brush disposed in the suction port, a drive unit that rotates the brush, a case that supports at least a portion of the drive unit, and the damping member. The first member may include the case and the second member may include the housing.

[0075] In the configuration explained above, when the case of the drive unit is a vibration source, the damping member can damp vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0076] In the one or more embodiments, the drive unit may include a motor and a gear that transmits a rotational force generated by the motor to the brush. The case may support the gear.

[0077] In the configuration explained above, when the case of the gear is a vibration source, the damping member can damp the vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0078] In the one or more embodiments, the drive unit may include a motor. The case may support the motor.

[0079] In the configuration explained above, when the case of the motor is the vibration source, the damping member can damp the vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0080] In the one or more embodiments, the damping member may include a tubular portion. The case may include a holding portion disposed around the tubular portion. The housing may include a protruding portion inserted into the tubular portion.

[0081] In the configuration explained above, the tubular portion of the damping member can damp vibration transmitted from the holding portion of the case to the protruding portion of the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0082] In the one or more embodiments, the cleaning device may include a housing including a suction port, a brush disposed in the suction port, a drive unit that rotates the brush, and the damping member explained above. The drive unit may include a motor, an output shaft coupled to the motor, and a relay shaft coupled to the brush. The first member may include the output shaft and the second member may include the relay shaft.

[0083] In the configuration explained above, when the output shaft is a vibration source, the damping member can damp vibration transmitted from the output shaft to the relay shaft. Since vibration of the relay shaft is reduced, noise generated from the cleaning device is reduced. In addition, the damping member can transmit a rotational force of the output shaft to the relay shaft while allowing a change in relative positions of the output shaft and the relay shaft.

[0084] In the one or more embodiments, the damping member may include one surface, another surface facing a direction opposite to a direction in which the one surface faces, a first recess provided on the one surface, and a second recess provided on the other surface. The output shaft may include a first cam portion inserted into the first recess. The relay shaft may include a second cam portion inserted into the second recess.

[0085] In the configuration explained above, the damping member can transmit a rotational force of the output shaft to the relay shaft while allowing a change in relative positions of the output shaft and the relay shaft.

[0086] In the one or more embodiments, the suction head of the cleaning device may include a housing including a suction port, a brush disposed in the suction port, a power transmission mechanism that transmits a rotational force generated by the motor to the brush, a case that supports the power transmission mechanism, and the damping member. The first member may include the case and the second member may include the housing.

[0087] In the configuration explained above, when the case of the power transmission mechanism is a vibration source, the damping member can damp vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0088] In the one or more embodiments, the power transmission mechanism may include a gear. The case may support the gear.

[0089] In the configuration explained above, when the case that supports the gear of the power transmission mechanism is a vibration source, the damping member can damp vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0090] In the one or more embodiments, the power transmission mechanism may include a pulley and a belt wound on the pulley. The case may support the pulley.

[0091] In the configuration explained above, when the case that supports the pulley of the power transmission mechanism is a vibration source, the damping member can damp vibration transmitted from the case to the housing. Since vibration of the housing is reduced, noise generated from the cleaning device is reduced.

[0092] In the one or more embodiments, the suction head may include a screw that fixes the first member and the second member. The damping member may be disposed around the screw.

[0093] In the configuration explained above, in a state in which the first member and the second member are fixed by the screw, the damping member can damp vibration transmitted from one member of the first member and the second member to the other member.

[0094] Embodiments according to the present disclosure are explained below with reference to the drawings. However, the present disclosure is not limited to the embodiments. Components in the embodiments explained below can be combined as appropriate. A part of the components is sometimes not used.

[0095] In the embodiments, positional relationships of sections are explained using terms of left, right, front, rear, up, and down. These terms indicate relative positions or directions with respect to the center of a cleaning device 1.

First Embodiment

[0096] A first embodiment is explained.

Cleaning Device

[0097] FIG. 1 is a perspective view from the left front illustrating a cleaning device 1 according to the present embodiment. FIG. 2 is a perspective view from the right rear illustrating the cleaning device 1 according to the present embodiment. FIG. 3 is a front view illustrating the cleaning device 1 according to the present embodiment. FIG. 4 is a top view illustrating the cleaning device 1 according to the present embodiment. FIG. 5 is a bottom view illustrating the cleaning device 1 according to the present embodiment. FIG. 6 is a cross-sectional view illustrating the cleaning device 1 according to the present embodiment and is equivalent to an A-A line cross-sectional arrow view of FIG. 3. FIG. 7 is a cross-sectional view illustrating the cleaning device 1 according to the present embodiment and is equivalent to a B-B line cross-sectional arrow view of FIG. 3. FIG. 8 is a cross-sectional view illustrating the cleaning device 1 according to the present embodiment and is equivalent to a C-C line cross-sectional arrow view of FIG. 4. FIG. 9 is a cross-sectional view illustrating a part of the cleaning device 1 according to the present embodiment and is equivalent to an enlarged view of a part of FIG. 8.

[0098] The cleaning device 1 includes a body 2, a suction head 3 coupled to the lower end portion of the body 2, a connection pipe 4 connecting the body 2 and the suction head 3, and a handle 5 provided in an upper portion of the body 2.

[0099] In the present embodiment, the cleaning device 1 is an upright cleaning device. The upright cleaning device refers to a cleaning device in which the body 2 can stand upright with respect to the suction head 3. The lower end portion of the body 2 is turnably coupled to the suction head 3. A turning shaft of the body 2 extends in the left-right direction. The body 2 can turn to change to an upright state and an inclined state with respect to the suction head 3. A foot lever 6 is provided between the body 2 and the suction head 3. A user can perform, by operating the foot lever 6, switching between a first state in which the body 2 and the suction head 3 are fixed and a second state in which the fixing is released.

[0100] The body 2 includes a main body housing 20, a collection chamber cover 21, a motor chamber cover 22, a controller 7, and a suction unit 40. The main body housing 20 is long in the up-down direction. Each of the collection chamber cover 21 and the motor chamber cover 22 is attached to a front portion of the main body housing 20. The collection chamber cover 21 is disposed above the motor chamber cover 22. The main body housing 20 includes exhaust ports 8.

[0101] As illustrated in FIG. 8, the main body housing 20 includes a collection chamber 23 in which a dust bag 9 is disposed and a motor chamber 24 in which the suction unit 40 is disposed.

[0102] The collection chamber 23 is disposed above the motor chamber 24. The collection chamber cover 21 is disposed to cover an opening provided in a front portion of the collection chamber 23. The motor chamber cover 22 is disposed to cover an opening provided in a front portion of the motor chamber 24. The collection chamber 23 is defined by the main body housing 20 and the collection chamber cover 21. The motor chamber 24 is defined by the main body housing 20 and the motor chamber cover 22.

[0103] The collection chamber cover 21 opens and closes the opening at the front portion of the collection chamber 23. A claw portion is provided at the lower end portion of the collection chamber cover 21. In the main body housing 20, a recess is provided on the lower side of the opening of the collection chamber 23. The recess is provided in the motor chamber cover 22. The claw portion of the collection chamber cover 21 is inserted into the recess of the motor chamber cover 22. In the main body housing 20, a latch mechanism 20A is provided on the upper side of the opening of the collection chamber 23. The latch mechanism 20A fixes an upper portion of the collection chamber cover 21 and the main body housing 20. The collection chamber cover 21 includes a latch lever 21A operated by the user. The latch lever 21A is provided in a front portion of the collection chamber cover 21. When the latch lever 21A is operated by the user to move forward, the fixing of the main body housing 20 and the collection chamber cover 21 by the latch mechanism 20A is released. Accordingly, the opening in the front portion of the collection chamber 23 is opened.

[0104] As illustrated in FIG. 8, the body 2 includes: a flow path 25 connecting the collection chamber 23 and the motor chamber 24 in the main body housing 20, a filter 26 disposed at a boundary between the flow path 25 and the collection chamber 23, a sponge sheet 27 disposed in a flow path of air leading to the exhaust port 8, and a coupling pipe 28 disposed in an upper portion of the main body housing 20.

[0105] The flow path 25 is provided in the main body housing 20 on the right side of the collection chamber 23 and the motor chamber 24. The flow path 25 is provided to extend in the up-down direction. An upper portion of the flow path 25 is connected to the collection chamber 23. A lower portion of the flow path 25 is connected to the motor chamber 24. The collection chamber 23 and the motor chamber 24 are connected via the flow path 25.

[0106] The filter 26 collects dust. The filter 26 is disposed in a right portion of the collection chamber 23. As the filter 26, a high efficiency particulate air filter (HEPA filter) is exemplified. The filter 26 is detachably attachable to the main body housing 20.

[0107] The sponge sheet 27 is disposed in the flow path of air leading to the exhaust ports 8. The sponge sheet 27 is a sound absorbing material for exhaust air flowing to the exhaust port 8.

[0108] The coupling pipe 28 is disposed to pierce through an upper portion of the main body housing 20. The lower end portion of the coupling pipe 28 is disposed in the collection chamber 23. The dust bag 9 is connected to the lower end portion of the coupling pipe 28. Dust is stored in the dust bag 9.

[0109] The suction head 3 faces a cleaning target surface. The suction head 3 is movable on the cleaning target surface. The suction head 3 includes a base housing 30, a head housing 31, a bumper 32, a battery chamber cover 33, a brush 34, a coupling pipe 35, traveling wheels 36, and auxiliary wheels 37.

[0110] The base housing 30 faces the cleaning target surface. The base housing 30 has a suction port 38. The suction port 38 is disposed in a front portion of a bottom portion of the base housing 30. The suction port 38 sucks dust on the cleaning target surface.

[0111] The head housing 31 is coupled to the main body housing 20. The head housing 31 is disposed above the base housing 30. The head housing 31 includes a battery chamber 39.

[0112] The bumper 32 is disposed to cover a front portion of the base housing 30 and a front portion of the head housing 31. The bumper 32 protects the front portion of the base housing 30 and the front portion of the head housing 31.

[0113] The battery chamber cover 33 is turnably coupled to the head housing 31. The battery chamber cover 33 is disposed to cover an opening provided in an upper portion of battery chamber 39. The battery chamber 39 is defined by the head housing 31 and the battery chamber cover 33.

[0114] In the head housing 31, a latch mechanism 31A is provided on the rear side of the opening of the battery chamber 39. The latch mechanism 31A fixes a rear portion of the battery chamber cover 33 and the head housing 31. The battery chamber cover 33 includes a latch lever 33A operated by a user. The latch lever 33A is provided in a rear portion of the battery chamber cover 33. A front portion of the battery chamber cover 33 is turnably supported by a front portion of the head housing 31 via a hinge mechanism 31B. When the latch lever 33A is operated by the user to move upward, the fixing of the head housing 31 and the battery chamber cover 33 by the latch mechanism 31A is released. Accordingly, the opening in the upper portion of the battery chamber 39 is opened.

[0115] FIG. 10 is a perspective view from the left front illustrating the suction head 3 according to the present embodiment. FIG. 10 illustrates a state in which the battery chamber cover 33 is opened. As illustrated in FIG. 10, the head housing 31 includes a battery chamber 39 in which the battery attachment portion 10 is disposed. In the front-rear direction, the battery chamber 39 is provided in the center of the head housing 31. An opening is provided in an upper portion of the battery chamber 39. The battery chamber cover 33 opens and closes the opening in the upper portion of battery chamber 39. The battery pack 11 is attached to the battery attachment portion 10. The battery pack 11 is a power source of the cleaning device 1.

[0116] FIG. 11 is a perspective view from the left front illustrating the battery attachment portion 10 according to the present embodiment. FIG. 11 illustrates a state in which the battery pack 11 is detached from the battery attachment portion 10. The battery attachment portion 10 is disposed on the bottom surface of the battery chamber 39. The battery pack 11 is attached to the battery attachment portion 10. In the present embodiment, two battery attachment portions 10 are provided. The two battery attachment portions 10 are disposed in the left-right direction. The battery attachment portions 10 include a left side battery attachment portion 10L and a right side battery attachment portion 10R.

[0117] The battery pack 11 supplies electric power to the cleaning device 1 in a state of being attached to the battery attachment portion 10. The battery pack 11 is a general-purpose battery usable as power supply units of various electric devices. The battery pack 11 is usable as a power supply unit of a power tool. The battery pack 11 is usable as a power supply unit of an electric device other than the electric tool. The battery pack 11 is usable as a power supply unit of a cleaning device different from the cleaning device 1 according to the present embodiment. The battery pack 11 includes a lithium ion battery. The battery pack 11 includes a rechargeable secondary battery. The battery attachment portion 10 has a structure equivalent to that of the battery attachment portion of the electric tool.

[0118] The user of the cleaning device 1 can perform work of attaching the battery pack 11 on the battery attachment portion 10 and work of detaching the battery pack 11 from the battery attachment portion 10. The battery attachment portion 10 includes a guide member and a main body terminal. The battery pack 11 includes a battery terminal. The guide member of the battery attachment portion 10 guides the battery pack 11. The main body terminal of the battery attachment portion 10 is connected to the battery terminal of the battery pack 11.

[0119] When attaching the battery pack 11 to the left side battery attachment portion 10L, the user can attach the battery pack 11 to the battery attachment portion 10L by inserting the battery pack 11 into the battery attachment portion 10L from the left side. The battery pack 11 is inserted into the battery attachment portion 10L while being guided by the guide member. When the battery pack 11 is attached to the battery attachment portion 10L, the battery terminal of the battery pack 11 and the main body terminal of the battery attachment portion 10L are electrically connected. The battery pack 11 includes a fixing release button. The user of the cleaning device 1 can detach the battery pack 11 from the battery attachment portion 10L by operating the fixing release button of the battery pack 11 to move the battery pack 11 to the right side.

[0120] When attaching the battery pack 11 to the right side battery attachment portion 10R, the user can attach the battery pack 11 to the battery attachment portion 10R by inserting the battery pack 11 into the battery attachment portion 10R from the right side. The battery pack 11 is inserted into the battery attachment portion 10R while being guided by the guide member. The battery pack 11 is attached to the battery attachment portion 10R, whereby the battery terminal of the battery pack 11 and the main body terminal of the battery attachment portion 10R are electrically connected. The battery pack 11 includes a fixing release button. The user of the cleaning device 1 can detach the battery pack 11 from the battery attachment portion 10R by operating the fixing release button of the battery pack 11 to move the battery pack 11 to the left side.

[0121] The brush 34 is disposed in the suction port 38. The brush 34 is rotatable about a rotation axis extending in the left-right direction. The brush 34 rotates to scrape off dust present on the cleaning target surface. A height adjustment dial 12 is disposed in an upper portion of the head housing 31. The height adjustment dial 12 is operated by the user. The height of the brush 34 is adjusted by operating the height adjustment dial 12.

[0122] The coupling pipe 35 is coupled to the connection pipe 4. The coupling pipe 35 sends dust sucked from the suction port 38 to the connection pipe 4. As illustrated in FIG. 6, the front end portion of the coupling pipe 35 is connected to the suction port 38. The rear end portion of the coupling pipe 35 is connected to the connection pipe 4.

[0123] Each of the traveling wheels 36 and the auxiliary wheels 37 are provided in a bottom portion of the base housing 30. Two traveling wheels 36 are provided. The traveling wheels 36 rotate about a rotation axis extending in the left-right direction. The traveling wheels 36 rotate, whereby the suction head 3 moves. Two auxiliary wheels 37 are provided. The auxiliary wheels 37 are disposed forward of the traveling wheels 36. The auxiliary wheels 37 rotate about a rotation axis extending in the left-right direction.

[0124] The suction head 3 includes a light 13 that illuminates the front of the suction head 3. Two lights 13 are provided in a front portion of the suction head 3.

[0125] The connection pipe 4 connects the body 2 and the suction head 3. The connection pipe 4 connects the coupling pipe 28 of the body 2 and the coupling pipe 35 of the suction head 3. The connection pipe 4 is disposed along up-down direction in the right rear of the body 2.

[0126] The suction unit 40 generates a suction force in the suction port 38 communicating with the inner side of the main body housing 20. The suction unit 40 is disposed in the motor chamber 24. As illustrated in FIG. 9, the suction unit 40 includes a motor 41, a blower fan 42, a motor housing 43, a base 44, a fan cover 45, and a sensor substrate 46.

[0127] The motor 41 is a power source of the cleaning device 1. The motor 41 is an electric motor. The motor 41 is driven by power supply from the battery pack 11. The motor 41 is an inner rotor type DC brushless motor. As illustrated in FIG. 9, the motor 41 includes a stator 47, a rotor 48, and a rotor shaft 49. The stator 47 includes a stator core 47A including a plurality of teeth, an insulator 47B fixed to the stator core 47A, and coils 47C respectively wound on the teeth of the stator core 47A via the insulator 47B. The rotor 48 is disposed radially inward of the stator 47. The rotor 48 includes a rotor core 48A and a plurality of permanent magnets 48B embedded in the rotor core 48A. The rotor shaft 49 is fixed to the rotor 48. The rotor 48 is disposed around the rotor shaft 49. The rotor shaft 49 is long in the left-right direction. The rotor 48 and the rotor shaft 49 rotate together about a rotation axis AX of the motor 41. The rotation axis AX extends in the left-right direction. The right end portion of the rotor shaft 49 is rotatably supported by a bearing 50. The left end portion of the rotor shaft 49 is rotatably supported by the bearing 51.

[0128] The blower fan 42 generates a suction force in the suction port 38. The blower fan 42 is rotated by a rotational force generated by the motor 41. The blower fan 42 is fixed to the right end portion of the rotor shaft 49. The rotor shaft 49 rotates, whereby the blower fan 42 rotates together with the rotor shaft 49. The blower fan 42 rotates, whereby a suction force is generated in the suction port 38.

[0129] The motor housing 43 houses the motor 41. The motor housing 43 holds the stator 47, the bearing 50, and the bearing 51.

[0130] The base 44 is disposed around a right portion of the motor housing 43. The base 44 is fixed to the motor housing 43. The base 44 supports the fan cover 45.

[0131] The fan cover 45 is disposed to cover at least a part of the blower fan 42. The fan cover 45 is connected to the base 44. At least a part of the fan cover 45 is disposed around the blower fan 42. At least a part of the fan cover 45 is disposed rightward of the blower fan 42. The peripheral edge of the fan cover 45 is fixed to the base 44. The fan cover 45 includes a fan intake port 45A. The fan intake port 45A is provided at the right end portion of the fan cover 45. The blower fan 42 rotates, whereby air flows into the blower fan 42 from the fan intake port 45A. The air having passed through the blower fan 42 flows out to the left side of the base 44 through an opening provided in the base 44.

[0132] The motor housing 43 is supported by a support member 52 made of rubber. The support member 52 is supported by the main body housing 20. The fan cover 45 is supported by the support member 53 made of rubber. The support member 53 is supported by the main body housing 20.

[0133] The sensor substrate 46 detects a position of the rotor 48 in a rotating direction. The sensor substrate 46 is fixed to a left portion of the insulator 47B of the stator 47. The sensor substrate 46 includes a rotation detection element supported by an annular circuit board. The rotation detection element detects the position of a permanent magnet of the rotor 48 to thereby detect the position of the rotor 48 in the rotating direction. The controller 7 supplies a drive current to the coils of the stator 47 based on detection data of the rotation detection element.

[0134] As illustrated in FIG. 6, a sound absorbing member 14 is disposed at least partially around the suction unit 40. As the sound absorbing member 14, a porous member made of a synthetic resin is exemplified.

[0135] The controller 7 controls electric members attached to the cleaning device 1. The controller 7 operates with power supply from the battery pack 11. The controller 7 controls at least the motor 41. The controller 7 controls a drive current supplied from the battery pack 11 to the motor 41. The controller 7 includes a substrate on which a plurality of electronic components are mounted. Examples of the electronic components mounted on the substrate include a processor such as a central processing unit (CPU), a nonvolatile memory such as a read only memory (ROM) or a storage, a volatile memory such as a random access memory (RAM), and a resistor.

[0136] The handle 5 is coupled to an upper portion of the main body housing 20. The handle 5 is gripped by the user. The user can move the cleaning device 1 while gripping the handle 5. An operation switch 15 is provided in the handle 5. The user is capable of operating the operation switch 15 while gripping the handle 5. The operation switch 15 is operated by the user in order to switch between driving and stopping of the motor 41. The operation switch 15 includes a drive switch 15A operated in order to drive the motor 41 and a stop switch 15B operated in order to stop the motor 41. The drive switch 15A is operated in a state in which the motor 41 is stopped, whereby the motor 41 is started. The drive switch 15A is operated in a state in which the motor 41 is driven, whereby a drive mode of the motor 41 is switched.

Suction Head

[0137] FIG. 12 is a perspective view from the left front illustrating the inside of the suction head 3 according to the present embodiment. FIG. 13 is a perspective view from the left front illustrating a part of the inside of the suction head 3 according to the present embodiment and is equivalent to an enlarged view of a part of FIG. 12. FIG. 14 is a front view illustrating a part of the inside of the suction head 3 according to the present embodiment and is equivalent to a view of a D portion in FIG. 13 from the front side.

[0138] The suction head 3 includes: a base housing 30 including a suction port 38; a head housing 31 disposed above the base housing 30; a bumper 32 covering a front portion of the base housing 30 and a front portion of the head housing 31; a brush 34 disposed in the suction port 38; a drive unit 60 that rotates the brush 34; a case 70 that supports at least a part of the drive unit 60; and damping members 80 for damping vibration of the cleaning device 1.

[0139] The base housing 30 and the head housing 31 are fixed by a plurality of screws 19. The base housing 30 includes a plurality of screw bosses 30A including screw holes. The head housing 31 includes a plurality of screw openings in which the screws 19 are disposed. The screws 19 are inserted into the screw holes of the screw bosses 30A of the base housing 30 after being inserted into the screw openings of the head housing 31. Screw portions of the screws 19 and the screw holes of the screw bosses 30A are coupled, whereby the base housing 30 and the head housing 31 are fixed.

[0140] The drive unit 60 is supported by the base housing 30 and the head housing 31. The drive unit 60 includes a motor 61 and a power transmission mechanism 62 that transmits a rotational force generated by the motor 61 to the brush 34. The case 70 supports the power transmission mechanism 62.

[0141] The motor 61 is an inner rotor type DC brushless motor. The motor 61 is disposed rearward of the brush 34. The motor 61 is disposed in the left portion of the suction head 3. The motor 61 includes an output shaft 61A. A rotation axis of the output shaft 61A extends in the left-right direction.

[0142] FIG. 15 is a perspective view from the left front illustrating the power transmission mechanism 62 according to the present embodiment. FIG. 15 is equivalent to a diagram in which the base housing 30 and the case 70 in FIG. 13 are indicated by imaginary lines. The power transmission mechanism 62 transmits a rotational force of the output shaft 61A of the motor 61 to the brush 34. In the present embodiment, the power transmission mechanism 62 includes a plurality of gears 63. In the present embodiment, the gears 63 include a first gear 63A having a large diameter portion that meshes with the output shaft 61A, a second gear 63B that meshes with a small diameter portion of the first gear 63A, and a third gear 63C that meshes with the second gear 63B. The third gear 63C is fixed to the left end portion of the brush 34. When the output shaft 61A rotates, the first gear 63A rotates. When the first gear 63A rotates, the second gear 63B rotates. When the second gear 63B rotates, the third gear 63C rotates. When the third gear 63C rotates, the brush 34 rotates together with the third gear 63C.

[0143] The case 70 supports each of the plurality of gears 63 to be rotatable. The drive unit 60 includes bearings 64 that support the gears 63 to be rotatable. The bearings 64 include a first bearing 64A that supports the first gear 63A to be rotatable, a second bearing 64B that supports the second gear 63B to be rotatable, and a third bearing 64C that supports the third gear 63C to be rotatable. The bearings 64 are held by the case 70. The case 70 supports the gears 63 to be rotatable via the bearings 64.

[0144] The case 70 includes a case body 71 surrounding the plurality of gears 63, a case cover 72 covering an opening at the left end portion of the case body 71, and four screws 73 that fix the case body 71 and the case cover 72. Screw bosses 71A are provided on the outer peripheral surface of the case body 71. The screws 73 are inserted into screw holes of the screw bosses 71A through screw openings provided in the peripheral edge portion of the case cover 72. A shaft hole 71B into which the output shaft 61A is inserted is provided in an upper portion of the case body 71.

[0145] FIG. 16 is an exploded perspective view from the left front illustrating a part of the inside of the suction head 3 according to the present embodiment. FIG. 17 is a cross-sectional view illustrating a part of the suction head 3 according to the present embodiment and is equivalent to an E-E line cross-sectional arrow view of FIG. 13. FIG. 18 is a cross-sectional view illustrating a part of the suction head 3 according to the present embodiment and is equivalent to an F-F line cross-sectional arrow view of FIG. 13. FIG. 19 is a cross-sectional view illustrating a part of the suction head 3 according to the present embodiment and is equivalent to a G-G line cross-sectional arrow view of FIG. 13.

[0146] The base housing 30 includes a base portion 300 and a protruding portion 301 protruding upward from the base portion 300. The suction port 38 is provided in a front portion of the lower surface of the base portion 300. In a plane orthogonal to a rotation axis of the brush 34, at least a part of the base portion 300 has an arc shape arranged around an upper portion of the brush 34.

[0147] The protruding portion 301 is provided in a front portion of a left portion of the base portion 300. The base portion 300 and the protruding portion 301 are integral (a single member). Two protruding portions 301 are provided. The protruding portions 301 include first protruding portion 301A provided at the front end portion of the left portion of the base portion 300 and second protruding portion 301B disposed rearward of the first protruding portion 301A.

[0148] The case 70 includes a holding portion 74. The holding portion 74 has an annular shape. The holding portion 74 is provided in the case body 71. The case body 71 and the holding portion 74 are integral (a single member). Two holding portions 74 are provided. The holding portions 74 include a first holding portion 74A provided in a front portion of the case body 71 an a second holding portion 74B provided in a rear portion of the case body 71.

[0149] Each of the holding portions 74 has an annular shape. The holding portions 74 are disposed upward of the protruding portions 301. The protruding portions 301 and the holding portions 74 are aligned. The first protruding portion 301A and the first holding portion 74A are aligned. The second protruding portion 301B and the second holding portion 74B are aligned.

[0150] The suction head 3 includes screws 16 that fix the case 70 and the base housing 30. The screws 16 are fixing members that fix the case 70 and the base housing 30. The protruding portions 301 and the holding portions 74 function as screw bosses. The holding portions 74 include openings 75 into which the screws 16 are inserted. The protruding portions 301 include screw holes 302 into which screw portions of the screws 16 are inserted. The screws 16 include a first screw 16A that fixes the first protruding portion 301A and the first holding portion 74A and a second screw 16B that fixes the second protruding portion 301B and the second holding portion 74B.

[0151] Washers 17 are disposed in lower portions of the heads of the screws 16. The washers 17 include a first washer 17A disposed on the first screw 16A and a second washer 17B disposed on the second screw 16B.

[0152] Damping members 80 are disposed at a boundary between the base housing 30 and the case 70. Each of the damping members 80 is disposed at a boundary between the corresponding protruding portion 301 and the corresponding holding portion 74. Each of the damping members 80 is disposed around the corresponding screw 16. The damping members 80 reduce vibration transmitted from the case 70 to the base housing 30. The damping members 80 damp noise.

[0153] As illustrated in FIG. 19, the brush 34 includes a shaft portion 34A and a brush portion 34B fixed to the outer peripheral surface of the shaft portion 34A. A first coupling member 18 is fixed to the left end portion of the shaft portion 34A. The first coupling member 18 is coupled to the third gear 63C via a second coupling member 29. When the brush 34 rotates and hits the cleaning target surface, an impact force is input to the brush 34. The impact force input to the brush 34 is transmitted to the third gear 63C via the first coupling member 18 and the second coupling member 29. The impact force is transmitted to the third gear 63C, whereby a contact force among tooth surfaces of the plurality of gears 63 (63A, 63B, and 63C) fluctuates. When the contact force among the tooth surfaces of the plurality of gears 63 fluctuates, rotating speed of the gears 63 fluctuates. When the rotating speed of the gears 63 fluctuates, the case 70 vibrates. The vibration of the case 70 is transmitted to the base housing 30 via the washers 17 and the screws 16. Since the base housing 30 and the head housing 31 are fixed by the plurality of screws 19, the vibration of the base housing 30 is transmitted to the head housing 31 via the screws 19. When the vibration of the case 70 is transmitted to the base housing 30 and the head housing 31, noise (gear sound) is likely to be generated from at least one of the base housing 30 and the head housing 31.

[0154] When the impact force is input to the brush 34, the case 70 vibrates not via the gears 63. When the vibration of the case 70 is transmitted to the base housing 30 and the head housing 31 via the washers 17 and the screws 16, noise (brush sound) is likely to be generated from at least one of the base housing 30 and the head housing 31.

[0155] In the present embodiment, the damping members 80 reduce the vibration of the case 70 from being transmitted to the base housing 30. The damping members 80 reduce noise (gear sound and brush sound) generated from the base housing 30 and the head housing 31.

[0156] FIG. 20 is a cross-sectional view illustrating the vicinity of a first damping member 80A according to the present embodiment. FIG. 21 is a perspective view illustrating the first damping member 80A according to the present embodiment. FIG. 22 is a side view illustrating the first damping member 80A according to the present embodiment. Each of FIG. 20, FIG. 21, and FIG. 22 illustrates the first damping member 80A. The first damping member 80A and a second damping member 80B have substantially the same structure. The first damping member 80A is explained below.

[0157] The damping member 80 (the first damping member 80A) is an elastic member. The damping member 80 can be elastically deformed. The damping member 80 is a flexible member. The damping member 80 can be flexurally deformed. In the present embodiment, the damping member 80 is made of rubber. The damping member 80 may be made of synthetic resin or may be a porous member such as sponge.

[0158] The damping member 80 is substantially tubular. A central axis CX of the damping member 80 extends in the up-down direction. The damping member 80 is disposed around the central axis CX. An opening 84 is provided in the center of the damping member 80 in a plane orthogonal to the central axis CX. The opening 84 is provided to penetrate the upper end surface and the lower end surface of the damping member 80.

[0159] The damping member 80 includes a tubular portion 81, a first flange portion 82 connected to the upper end portion of the tubular portion 81, and a second flange portion 83 connected to the lower end portion of the tubular portion 81.

[0160] The tubular portion 81 has a substantially cylindrical shape. The first flange portion 82 is connected to the upper end portion of the tubular portion 81. The first flange portion 82 includes: a tapered portion 82A inclined upward from the upper end portion of the tubular portion 81 and outward in the radial direction of the central axis CX; and a straight body portion 82B connected to the upper end portion of the tapered portion 82A. The second flange portion 83 is connected to the lower end portion of the tubular portion 81. The second flange portion 83 has a substantially cylindrical shape (straight body shape).

[0161] In a plane orthogonal to the central axis CX, a dimension D2 (an outer diameter) of the first flange portion 82 is larger than a dimension D1 (an outer diameter) of the tubular portion 81. In the plane orthogonal to the central axis CX, a dimension D3 (an outer diameter) of the second flange portion 83 is larger than the dimension D1 of the tubular portion 81. In the plane orthogonal to the central axis CX, the dimension D3 of the second flange portion 83 is larger than the dimension D2 of the first flange portion 82. In a direction parallel to the central axis CX, a dimension H2 (height) of the first flange portion 82 is larger than a dimension H1 (height) of the tubular portion 81. In the direction parallel to the central axis CX, the dimension H3 (height) of the second flange portion 83 is larger than the dimension H1 (height) of the tubular portion 81. In the direction parallel to the central axis CX, the dimension H3 of the second flange portion 83 is smaller than the dimension H2 of the first flange portion 82.

[0162] The first flange portion 82 includes a plurality of grooves 87 provided at intervals in the circumferential direction. The grooves 87 are long in the direction parallel to the central axis CX. The grooves 87 are provided over the tapered portion 82A and the straight body portion 82B. The grooves 87 include outer side grooves 87A recessed radially inward from the outer surface of the first flange portion 82 and inner side grooves 87B recessed radially outward from the inner surface of the first flange portion 82. The outer side grooves 87A are provided at equal intervals in the circumferential direction. The inner side grooves 87B are provided at equal intervals in the circumferential direction. In the circumferential direction, the inner side groove 87B is provided between a pair of outer side grooves 87A. The number of the outer side grooves 87A and the number of the inner side grooves 87B are the same.

[0163] In the present embodiment, the grooves 87 are not provided in the second flange portion 83. The grooves 87 may be provided in the second flange portion 83.

[0164] The damping member 80 is in contact with each of the holding portion 74 of the case 70, the washer 17 of the screw 16, and the protruding portion 301 of the base housing 30. At least a part of the damping member 80 is interposed between the holding portion 74 and the washer 17. At least a part of the damping member 80 is interposed between the holding portion 74 and the protruding portion 301. Because of the interposition of the damping member 80, the holding portion 74 and the washer 17 are separated without being in contact with each other. Due to the interposition of the damping member 80, the holding portion 74 and the protruding portion 301 are separated from each other without being in contact with each other.

[0165] The washers 17 and the heads of the screws 16 are in contact with each other. The screw portions of the screws 16 are coupled to the screw holes 302 of the protruding portions 301. The screws 16 and the protruding portions 301 are in contact with each other. The base housing 30 and the head housing 31 are fixed by the plurality of screws 19. In a vibration transmission path, the base housing 30 and the head housing 31 including the washers 17, the screws 16, and the protruding portions 301 can be regarded as a single member. In the following explanation, the case 70 including the holding portions 74 that are in contact with the damping members 80 is referred to as first member P1 as appropriate, and the washers 17, the screws 16, the base housing 30, and the head housing 31 that are in contact with the damping members 80 are collectively referred to as second member P2 as appropriate.

[0166] As illustrated in FIG. 20, a part of the holding portion 74 is disposed around the tubular portion 81. A part of the holding portion 74 is disposed around the tapered portion 82A. The holding portion 74 includes an inner surface 76 disposed around the tubular portion 81 and a tapered surface 77 disposed around the tapered portion 82A.

[0167] As illustrated in FIG. 20, at least a part of the protruding portion 301 is inserted into the tubular portion 81. The protruding portion 301 includes a large diameter portion 303 and a small diameter portion 304 protruding upward from the upper end portion of the large diameter portion 303. In the plane orthogonal to the central axis CX, a dimension (an outer diameter) of the large diameter portion 303 is larger than a dimension (an outer diameter) of the small diameter portion 304. The central axis of the large diameter portion 303 and the central axis CX of the damping member 80 coincide with each other. The central axis of the small diameter portion 304 and the central axis CX of the damping member 80 coincide with each other. A step 305 is provided between the upper end portion of the large diameter portion 303 and the lower end portion of the small diameter portion 304. At least a part of the protruding portion 301 is disposed in the opening 84 of the damping member 80.

[0168] In the present embodiment, the damping member 80 is inserted into the opening 75 from the lower side of the holding portion 74. As explained above, the plurality of grooves 87 are provided in the first flange portion 82. The grooves 87 enable the first flange portion 82 to be flexurally deformed to decrease in diameter. An assembly worker of the suction head 3 inserts the damping member 80 into the opening 75 from the lower side of the holding portion 74 in a state in which the first flange portion 82 is flexurally deformed to decrease in diameter. After the damping member 80 is inserted into the opening 75 of the holding portion 74, the small diameter portion 304 of the protruding portion 301 is inserted into the opening 84 from the lower end portion of the opening 84. The damping member 80 is positioned in the protruding portion 301 by the step 305. The second flange portion 83 is sandwiched by the lower surface 78 of the holding portion 74 and the upper surface of the large diameter portion 303 in the up-down direction.

[0169] As illustrated in FIG. 20, the damping member 80 includes a first contact surface 85 that is in contact with the first member P1 and a second contact surface 86 that is in contact with the second member P2.

[0170] As illustrated in FIG. 20, the first contact surface 85 includes an outer surface 85A of the tubular portion 81, an outer surface 85B (a first surface) of the tapered portion 82A of the first flange portion 82, and an upper surface 85C (a second surface) of the second flange portion 83. The outer surface 85A, the outer surface 85B, and the upper surface 85C face in directions different from one another.

[0171] The outer surface 85A of the tubular portion 81 faces outward in the radial direction of the central axis CX. The outer surface 85A is parallel to the central axis CX. The outer surface 85A is in contact with the inner surface 76 of the holding portion 74.

[0172] The outer surface 85B of the tapered portion 82A is inclined upward and outward in the radial direction of the central axis CX. The outer surface 85B is inclined with respect to the central axis CX. The outer surface 85B is in contact with the tapered surface 77 of the holding portion 74.

[0173] The upper surface 85C of the second flange portion 83 faces upward. The upper surface 85C of the second flange portion 83 is orthogonal to the central axis CX. The upper surface 85C is in contact with the lower surface 78 of the holding portion 74.

[0174] As illustrated in FIG. 20, the second contact surface 86 includes an inner surface 86A of the tubular portion 81, an upper surface 86B (a third surface) of the first flange portion 82, and a lower surface 86C (a fourth surface) of the second flange portion 83. The inner surface 86A, the upper surface 86B, and the lower surface 86C face in directions different from one another.

[0175] The inner surface 86A of the tubular portion 81 faces inward in the radial direction of the central axis CX. The inner surface 86A is parallel to the central axis CX. The inner surface 86A is in contact with the outer surface of the small diameter portion 304 of the protruding portion 301.

[0176] The upper surface 86B of the first flange portion 82 faces upward. The upper surface 86B is orthogonal to the central axis CX. The upper surface 86B is in contact with the lower surface of the washer 17.

[0177] The lower surface 86C of the second flange portion 83 faces downward. The lower surface 86C is orthogonal to the central axis CX. The lower surface 86C is in contact with the upper surface of the large diameter portion 303.

[0178] FIG. 23 is a side view illustrating a second damping member 80B according to the present embodiment. Like the first damping member 80A, the second damping member 80B includes a tubular portion 81, a first flange portion 82, and a second flange portion 83. The first flange portion 82 includes a tapered portion 82A and a straight body portion 82B. The grooves 87 are provided in the first flange portion 82.

[0179] In the second damping member 80B, the dimension D2 of the first flange portion 82 is larger than the dimension D1 of the tubular portion 81. The dimension D3 of the second flange portion 83 is larger than the dimension D1 of the tubular portion 81. The dimension D3 of the second flange portion 83 is larger than the dimension D2 of the first flange portion 82. The dimension H2 of the first flange portion 82 is smaller than the dimension H1 of the tubular portion 81. The dimension H3 of the second flange portion 83 is smaller than the dimension H1 of the tubular portion 81. The dimension H3 of the second flange portion 83 is smaller than the dimension H2 of the first flange portion 82.

Operation of Cleaning Device

[0180] When the drive switch 15A is operated by the user of the cleaning device 1 and the motor 41 is started to be driven, the blower fan 42 rotates. When the drive switch 15A is operated by the user and driving of the motor 61 is started, the brush 34 rotates. A suction force is generated in the motor chamber 24 by the rotation of the blower fan 42. When a suction force is generated in the motor chamber 24, a suction force is generated in the suction port 38 of the suction head 3. The suction force is generated in the suction port 38, whereby dust present on the cleaning target surface is sucked into the suction port 38 together with air.

[0181] The user can move the cleaning device 1 while gripping the handle 5 with a hand. When the cleaning target surface includes a carpet, the brush 34 rotates, whereby dust present on the carpet is scraped off by the brush 34.

[0182] The dust sucked into the suction port 38 is sent to the collection chamber 23 via the coupling pipe 35, the connection pipe 4, and the coupling pipe 28. The dust bag 9 is disposed in the collection chamber 23. The dust bag 9 is connected to the coupling pipe 28 in the collection chamber 23. The dust sent to the collection chamber 23 is collected in the dust bag 9. The air having passed through the dust bag 9 flows into the flow path 25 via the filter 26. The dust that has not been collected by the dust bag 9 is collected by the filter 26. The air having flowed into the flow path 25 passes through the sponge sheet 27 and thereafter flows into the motor chamber 24. The air having flowed into the motor chamber 24 flows into the blower fan 42 via the fan intake port of the fan cover 45. The air having passed through the blower fan 42 flows out to the left side of the base 44 through an opening provided in the base 44. The air having flowed out to the left side of the base 44 is discharged from the exhaust port 8 to the outside of the body 2.

[0183] As explained above, when the brush 34 rotates and hits the cleaning target surface, an impact force is input to the brush 34. The case 70, which is the first member P1, vibrates because of the impact force input to the brush 34. In the present embodiment, the damping members 80 are interposed between the first member P1 including the case 70 and the second member P2 including the base housing 30 and the head housing 31. The damping members 80 damp vibration transmitted from the first member P1 to the second member P2. Since vibration of the second member P2 is reduced, noise generated from the suction head 3 is reduced.

Effects

[0184] As explained above, in the present embodiment, the damping member 80 damps vibration of the suction head 3 including the first member P1 and the second member P2. The damping member 80 includes the first contact surface 85 that is in contact with the first member P1 and the second contact surface 86 that is in contact with the second member P2. The first contact surface 85 is in contact with the first member P1 and includes at least two contact surfaces facing in directions different from each other. In the present embodiment, the first contact surface 85 is in contact with the first member P1 and includes the outer surface 85A, the outer surface 85B, and the upper surface 85C facing in directions different from one another.

[0185] In the configuration explained above, since the first contact surface 85 includes the outer surface 85A, the outer surface 85B, and the upper surface 85C facing in directions different from one another, a contact area of the damping member 80 and the first member P1 increases. Therefore, the damping member 80 can effectively damp vibration. Since the vibration is damped, noise generated from the suction head 3 is reduced.

[0186] In the present embodiment, the suction head 3 includes the base housing 30 including the suction port 38, the brush 34 disposed in the suction port 38, the drive unit 60 that rotates the brush 34, the case 70 that supports at least a part of the drive unit 60, and the damping member 80. The first member P1 includes the case 70. The second member P2 includes the base housing 30 and the head housing 31.

[0187] As explained above, when the brush 34 rotates and hits the cleaning target surface, an impact force is input to the brush 34. The impact force input to the brush 34 is transmitted to the third gear 63C via the first coupling member 18 and the second coupling member 29. The impact force is transmitted to the third gear 63C, whereby a contact force among tooth surfaces of the plurality of gears 63 (63A, 63B, and 63C) fluctuates. When the contact force among the tooth surfaces of the plurality of gears 63 fluctuates, rotating speed of the gears 63 fluctuates. When the rotating speed of the gears 63 fluctuates, the case 70 vibrates. The vibration of the case 70 is transmitted to the base housing 30 via the washers 17 and the screws 16. Since the base housing 30 and the head housing 31 are fixed by the plurality of screws 19, the vibration of the base housing 30 is transmitted to the head housing 31 via the screws 19. When the vibration of the case 70 is transmitted to the base housing 30 and the head housing 31, noise (gear sound) is likely to be generated from at least one of the base housing 30 and the head housing 31.

[0188] When the impact force is input to the brush 34, the case 70 vibrates not via the gears 63. When the vibration of the case 70 is transmitted to the base housing 30 and the head housing 31 via the washers 17 and the screws 16, noise (brush sound) is likely to be generated from at least one of the base housing 30 and the head housing 31.

[0189] In the present embodiment, the first member P1 including the case 70 is a vibration source. When the vibration of the case 70 is transmitted to the second member P2 including the base housing 30 and the head housing 31, noise (gear sound and brush sound) is likely to be generated.

[0190] When the first member P1 is the vibration source, the damping member 80 can damp vibration transmitted from the first member P1 to the second member P2. Since vibration of the second member P2 is reduced, noise generated from the suction head 3 is reduced. Since the first contact surface 85 includes the outer surface 85A, the outer surface 85B, and the upper surface 85C facing in directions different from one another, the damping member 80 can effectively damp vibrations of the first member P1 in a plurality of vibration directions even if the first member P1 vibrates in directions different from one another. Since vibration of the second member P2 is reduced, noise generated from the suction head 3 is reduced.

[0191] That is, when the case 70 of the drive unit 60 is a vibration source, the damping member 80 can damp vibration transmitted from the case 70 to the base housing 30 and the head housing 31. Since vibration of the base housing 30 and the head housing 31 is reduced, noise generated from the suction head 3 is reduced.

[0192] When the second member P2 is a vibration source, the damping member 80 can damp vibration transmitted from the second member P2 to the first member P1. Since vibration of the first member P1 is reduced, noise generated from the suction head 3 is reduced. Since the first contact surface 85 includes the outer surface 85A, the outer surface 85B, and the upper surface 85C facing in directions different from one another, the damping member 80 can effectively damp vibrations in a plurality of vibration directions input to the first member P1 even if the directions of the vibrations input to the first member P1 are different from one another. Since vibration of the first member P1 is reduced, noise generated from the suction head 3 is reduced.

[0193] In the present embodiment, the second contact surface 86 is in contact with the second member P2 and includes at least two contact surfaces facing in directions different from each other. In the present embodiment, the second contact surface 86 is in contact with the second member P2 and includes the inner surface 86A, the upper surface 86B, and the lower surface 86C facing in directions different from one another.

[0194] In the configuration explained above, when the first member P1 is a vibration source, since the second contact surface 86 includes the inner surface 86A, the upper surface 86B, and the lower surface 86C facing in directions different from one another, the damping member 80 can effectively damp vibrations in a plurality of vibration directions even if directions of vibrations input to the second member P2 are different from one another.

[0195] When the second member P2 is a vibration source, since the second contact surface 86 includes the inner surface 86A, the upper surface 86B, and the lower surface 86C facing in directions different from one another, the damping member 80 can effectively damp vibrations in a plurality of vibration directions even if the second member P2 vibrates in different directions.

[0196] In the present embodiment, the damping member 80 includes the tubular portion 81. The first contact surface 85 includes the outer surface 85A of the tubular portion 81. The second contact surface 86 includes the inner surface 86A of the tubular portion 81.

[0197] In the configuration explained above, when the first member P1 is in contact with the outer surface 85A of the tubular portion 81 and the second member P2 is in contact with the inner surface 86A of the tubular portion 81, the damping member 80 can damp vibration transmitted from one member of the first member P1 and the second member P2 to the other member.

[0198] In the present embodiment, the second contact surface 86 includes the upper surface 86B and the lower surface 86C of the damping member 80.

[0199] In the configuration explained above, when the second member P2 is in contact with each of the upper surface 86B and the lower surface 86C of the damping member 80, the damping member 80 can damp vibration transmitted from the first member P1 to the second member P2.

[0200] In the present embodiment, the damping member 80 has the opening 84 in which at least a part of the second member P2 is disposed.

[0201] In the configuration explained above, when at least a part of the second member P2 is disposed in the opening 84 of the damping member 80, the damping member 80 can damp vibration transmitted from the first member P1 to the second member P2.

[0202] In the present embodiment, the damping member 80 includes the tubular portion 81, the first flange portion 82 connected to one end portion of the tubular portion 81, and the second flange portion 83 connected to the other end portion of the tubular portion 81. The first contact surface 85 includes the outer surface 85A of the tubular portion 81, the outer surface 85B, which is the first surface, of the first flange portion 82, and the upper surface 85C, which is the second surface, of the second flange portion 83. The second contact surface 86 includes the inner surface 86A of the tubular portion 81, the upper surface 86B, which is the third surface, of the first flange portion 82, and the lower surface 86C, which is a fourth surface, of the second flange portion 83.

[0203] In the configuration explained above, the damping member 80 can damp vibration transmitted from the first member P1 to the second member P2.

[0204] In the present embodiment, the first flange portion 82 includes the plurality of grooves 87 provided at intervals in the circumferential direction.

[0205] In the configuration explained above, since the first flange portion 82 is easily bent and deformed in the radial direction by the grooves 87, the damping member 80 can effectively damp vibration. When the damping member 80 is inserted into the opening 75 provided in the case 70, which is the first member P1, from the lower side of the holding portion 74, the first flange portion 82 is easily bent and deformed to decrease in diameter. Therefore, the damping member 80 is easily inserted into the opening 75 from the lower side of the holding portion 74.

[0206] The grooves 87 may be provided in the second flange portion 83. When the damping member 80 is inserted into the opening 75 from the upper side of the holding portion 74, the second flange portion 83 is easily bent and deformed to decease in diameter. Therefore, the damping member 80 is easily inserted into the opening 75 from the upper side of the holding portion 74.

[0207] In the present embodiment, the damping members 80 are disposed around the screws 16, which are the fixing members, for fixing the first member P1 and the second member P2.

[0208] In the configuration explained above, in a state in which the first member P1 and the second member P2 are fixed by the screws 16, the damping members 80 can damp vibration transmitted from the first member P1 to the second member P2.

[0209] In the present embodiment, the damping member 80 includes the tubular portion 81. The case 70 includes the holding portion 74 disposed around the tubular portion 81. The base housing 30 includes the protruding portion 301 inserted into the tubular portion 81.

[0210] In the configuration explained above, the tubular portion 81 of the damping member 80 can damp vibration transmitted from the holding portion 74 of the case 70 to the protruding portion 301 of the base housing 30. Since vibration of the base housing 30 is reduced, noise generated from the suction head 3 is reduced.

[0211] In the present embodiment, the drive unit 60 includes the motor 61 and the gears 63 that transmit a rotational force generated by the motor 61 to the brush 34.

[0212] The case 70 supports the gears 63.

[0213] In the configuration explained above, when the case 70 of the gears 63 is the vibration source, the damping member 80 can damp vibration transmitted from the case 70 to the base housing 30. Since vibration of the base housing 30 is reduced, noise generated from the suction head 3 is reduced.

[0214] In the present embodiment, the suction head 3 includes the base housing 30 including the suction port 38, the brush 34 disposed in the suction port 38, the power transmission mechanism 62 that transmits a rotational force generated by the motor 61 to the brush 34, the case 70 that supports the power transmission mechanism 62, and the damping member 80. The first member P1 includes the case 70 and the second member P2 includes the base housing 30.

[0215] In the configuration explained above, when the case 70 of the power transmission mechanism 62 is a vibration source, the damping member 80 can damp vibration transmitted from the case 70 to the base housing 30 and the head housing 31. Since vibration of the base housing 30 and the head housing 31 is reduced, noise generated from the suction head 3 is reduced.

Second Embodiment

[0216] A second embodiment is explained. In the following explanation, components that are the same as or equivalent to the components in the embodiment explained above are denoted by the same reference numerals and signs and explanation of the components is simplified or omitted.

[0217] FIG. 24 is a perspective view from the left front illustrating a suction head 103 according to the present embodiment. FIG. 25 is a perspective view from the left front illustrating the inside of the suction head 103 according to the present embodiment. FIG. 26 is a cross-sectional view from the left front illustrating the inside of the suction head 103 according to the present embodiment and is equivalent to an H-H line cross-sectional arrow view of FIG. 25. FIG. 27 is a cross-sectional view from the left front illustrating the inside of the suction head 103 according to the present embodiment and is equivalent to an I-I line cross-sectional arrow view of FIG. 25. FIG. 28 is a cross-sectional view from the left front illustrating the inside of the suction head 103 according to the present embodiment and is equivalent to a J-J line cross-sectional arrow view of FIG. 25. FIG. 29 is a perspective view from the left front illustrating a part of the inside of the suction head 103 according to the present embodiment and is equivalent to an enlarged view of a part of FIG. 25. FIG. 30 is an exploded perspective view from the left front illustrating a part of the inside of the suction head 103 according to the present embodiment and is equivalent to the exploded perspective view of FIG. 29. FIG. 31 is a front view illustrating a part of the inside of the suction head 103 according to the present embodiment and is equivalent to a view of a portion K in FIG. 25 viewed from the front side. FIG. 32 is a cross-sectional view illustrating a part of the suction head 103 according to the present embodiment and is equivalent to an L-L line cross-sectional arrow view of FIG. 29. FIG. 33 is a cross-sectional view illustrating a part of the suction head 103 according to the present embodiment and is equivalent to an M-M line cross-sectional arrow view of FIG. 29. FIG. 34 is a cross-sectional view illustrating the vicinity of a damping member 180 according to the present embodiment and is equivalent to an enlarged view of a part of FIG. 33. FIG. 35 is a perspective view illustrating the damping member 180 according to the present embodiment. FIG. 36 is a side view illustrating the damping member 180 according to the present embodiment.

[0218] The suction head 103 includes a base housing 130 including a suction port 138, a head housing 131 disposed above the base housing 130, a bumper 132 covering a front portion of the base housing 130 and a front portion of the head housing 131, a brush 134 disposed in the suction port 138, a coupling pipe 135 connected to the suction port 138, traveling wheels 136 and auxiliary wheels 137 provided in a bottom portion of the base housing 130, a drive unit 160 that rotates the brush 134, a case 170 that supports at least a part of the drive unit 160, and damping members 180 for damping vibration of the suction head 103.

[0219] In the present embodiment, a controller 107 is disposed in the suction head 103. A battery attachment portion 110 to which a battery pack 111 is attached is disposed on the outer side of the suction head 103. The battery attachment portion 110 is disposed above the suction head 103.

[0220] The drive unit 160 is supported by the base housing 130 and the head housing 131. The drive unit 160 includes a motor 161 and a power transmission mechanism 162 that transmits a rotational force generated by the motor 161 to the brush 134. The case 170 supports the motor 161.

[0221] The motor 161 is an inner rotor type DC brushless motor. The motor 161 is disposed rearward of the brush 134. The motor 161 includes an output shaft 163. In the present embodiment, the output shaft 163 is a rotor shaft of the motor 161. A rotation axis of the output shaft 163 extends in the left-right direction. As illustrated in FIG. 26, a right portion of the output shaft 163 is rotatably held by a bearing 163R. A left portion of the output shaft 163 is rotatably held by a bearing 163L. The bearing 163R and the bearing 163L are held by the case 170.

[0222] In the present embodiment, a blower fan 142 is fixed to the right end portion of the output shaft 163. A fan cover 145 is disposed around the blower fan 142. The blower fan 142 generates a suction force in the suction port 138. The blower fan 142 is rotated by a rotational force generated by the motor 161. The output shaft 163 rotates, whereby the blower fan 142 rotates together with the output shaft 163. The blower fan 142 rotates, whereby a suction force is generated in the suction port 138.

[0223] The power transmission mechanism 162 transmits a rotational force of the output shaft 163 of the motor 61 to the brush 134. In the present embodiment, the power transmission mechanism 162 includes a belt 164 and a pulley 165.

[0224] The pulley 165 is fixed to the left end portion of the brush 134. The pulley 165 is housed in a case 90. The case 90 supports the pulley 165. As illustrated in FIG. 27, a bearing holding member 91 is disposed inside the case 90. The bearing holding member 91 is a rod-shaped member. The bearing holding member 91 is fixed to the case 90. A bearing 92 is disposed around the bearing holding member 91. The bearing holding member 91 holds the bearing 92. The pulley 165 is supported by the bearing 92. The case 90 supports the pulley 165 to be rotatable via the bearing holding member 91 and the bearing 92.

[0225] The belt 164 has an annular shape. The belt 164 is a so-called endless belt. The belt 164 is wound on each of the left end portion of the output shaft 163 and the pulley 165. When the output shaft 163 rotates, the belt 164 rotates. When the belt 164 rotates, the pulley 165 rotates. When the pulley 165 rotates, the brush 134 rotates together with the pulley 165.

[0226] The case 170 supports the motor 161. The case 170 has a so-called half-divided structure. As illustrated in FIG. 29, the case 170 includes a lower case 171 and an upper case 172 disposed on the upper side of the lower case 171.

[0227] The base housing 130 includes a base portion 1300 and a plurality of protruding portions 1301 protruding upward from the base portion 1300. Four protruding portions 1301 are provided around the case 170.

[0228] The case 170 includes holding portions 174. Each of the holding portions 174 has an annular shape. Four holding portions 174 are provided at a peripheral edge portion of the case 170. As illustrated in FIG. 29, in the present embodiment, each of the holding portions 174 is formed by combining a lower side holding portion 174A provided at the peripheral edge portion of the lower case 171 and an upper side holding portion 174B provided at the peripheral edge portion of the upper case 172.

[0229] Each of the holding portions 174 has an annular shape. As explained above, four protruding portions 1301 are provided and four holding portions 174 are provided. The four protruding portions 1301 and the four holding portions 174 are respectively aligned. The protruding portions 1301 are respectively inserted into the holding portions 174.

[0230] The suction head 103 includes screws 116 that fix the case 170 and the base housing 130. The screws 116 are fixing members that fix the case 170 and the base housing 130. The protruding portions 1301 and the holding portions 174 function as screw bosses. The holding portions 174 include openings 175 into which the screws 116 are inserted. The protruding portions 1301 include screw holes 1302 into which screw portions of the screws 116 are inserted. Washers 117 are disposed in lower portions of the heads of the screws 116.

[0231] The damping members 180 are disposed at a boundary between the base housing 130 and the case 170. Each of the damping members 180 is disposed at a boundary between the corresponding protruding portion 1301 and the corresponding holding portion 174. Each of the damping members 180 is disposed around the corresponding screw 116. The damping members 180 reduce vibration transmitted form the case 170 to the base housing 130.

[0232] The damping members 180 are elastic members. The damping members 180 can be elastically deformed. The damping members 180 are flexible members. The damping members 180 can be flexurally deformed. In the present embodiment, the damping members 180 are made of rubber. The damping members 180 may be made of synthetic resin or may be a porous member such as sponge.

[0233] Each of the damping members 180 is substantially tubular. The central axis CX of each of the damping members 180 extends in the up-down direction. Each of the damping members 180 is disposed around the central axis CX. An opening 184 is provided in the center of each of the damping members 180 in a plane orthogonal to the central axis CX. The opening 184 is provided to penetrate the upper end surface and the lower end surface of the damping member 180.

[0234] Each of the damping members 180 includes a tubular portion 181, a first flange portion 182 connected to the upper end portion of the tubular portion 181, and a second flange portion 183 connected to the lower end portion of the tubular portion 181.

[0235] The tubular portion 181 has a substantially cylindrical shape. The first flange portion 182 is connected to the upper end portion of the tubular portion 181. The first flange portion 182 includes: a tapered portion 182A inclined upward from the upper end portion of the tubular portion 181 and outward in the radial direction of the central axis CX; a straight body portion 182B connected to the upper end portion of the tapered portion 182A. The second flange portion 183 is connected to the lower end portion of the tubular portion 181. The second flange portion 183 includes: a tapered portion 183A inclined downward from the lower end portion of the tubular portion 181 and outward in the radial direction of the central axis CX; and a straight body portion 183B connected to the lower end portion of the tapered portion 183A.

[0236] In a plane orthogonal to the central axis CX, a dimension D2 (an outer diameter) of the first flange portion 182 and a dimension D3 (an outer diameter) of the second flange portion 183 are equal. In a plane orthogonal to the central axis CX, the dimension D2 of the first flange portion 182 and the dimension D3 of the second flange portion 183 are larger than a dimension D1 of the tubular portion 181. In the direction parallel to the central axis CX, a dimension H2 (height) of the first flange portion 182 and a dimension H3 (height) of the second flange portion 183 are equal. In the direction parallel to the central axis CX, the dimension H2 of the first flange portion 182 and the dimension H3 of the second flange portion 183 are smaller than a dimension H1 (height) of the tubular portion 181.

[0237] The first flange portion 182 includes a plurality of grooves 187 provided at intervals in the circumferential direction. The grooves 187 are long in the direction parallel to the central axis CX. The grooves 187 are provided over the tapered portion 182A and the straight body portion 182B. The grooves 187 include outer side grooves 187A recessed radially inward from the outer surface of the first flange portion 182 and inner side grooves 187B recessed radially outward from the inner surface of the first flange portion 182. The outer side grooves 187A are provided at equal intervals in the circumferential direction. The inner side grooves 187B are provided at equal intervals in the circumferential direction. In the circumferential direction, the inner side groove 187B is provided between a pair of outer side grooves 187A. The number of the outer side grooves 187A and the number of the inner side grooves 187B are the same.

[0238] The second flange portion 183 includes a plurality of grooves 188 provided at intervals in the circumferential direction. The grooves 188 are long in the direction parallel to the central axis CX. The grooves 188 are provided over the tapered portion 183A and the straight body portion 183B. The grooves 188 include outer side grooves 188A recessed radially inward from the outer surface of the second flange portion 183 and inner side grooves 188B recessed radially outward from the inner surface of the second flange portion 183. The outer side grooves 188A are provided at equal intervals in the circumferential direction. The inner side grooves 188B are provided at equal intervals in the circumferential direction. In the circumferential direction, the inner side groove 188B is provided between a pair of outer side grooves 188A. The number of the outer side grooves 188A and the number of the inner side grooves 188B are the same.

[0239] In the present embodiment, the shape and the size of the first flange portion 182 and the shape and the size of the second flange portion 183 are the same. The damping member 180 has a vertically symmetrical structure.

[0240] Each of the damping members 180 is in contact with each of the corresponding holding portion 174 of the case 170, the corresponding washer 117 of the screw 116, and the corresponding protruding portion 1301 of the base housing 130. At least a part of each of the damping members 180 is interposed between the corresponding holding portion 174 and the corresponding washer 117. At least a part of each of the damping members 180 is interposed between the corresponding holding portion 174 and the corresponding protruding portion 1301. Because of the interposition of the damping member 180, the holding portion 174 and the washer 117 are separated from each other without being in contact with each other. Because of the interposition of the damping member 180, the holding portion 174 and the protruding portion 1301 are separated from each other without being in contact with each other.

[0241] The washers 117 and the heads of the screws 116 are in contact with each other. The screw portions of the screws 116 are coupled to the screw holes 1302 of the protruding portions 1301. The screws 116 and the protruding portions 1301 are in contact with each other. In a vibration transmission path, the washers 117, the screws 116, and the protruding portions 1301 can be regarded as a single member. In the following explanation, the holding portions 174 that are in contact with the damping members 180 are referred to as first member Q1 as appropriate, and the washers 117, the screws 116, and the protruding portions 1301 that are in contact with the damping members 180 are collectively referred to as second member Q2 as appropriate.

[0242] As illustrated in FIG. 34, a part of each of the holding portions 174 is disposed around the tubular portion 181. A part of each of the holding portions 174 is disposed around the tapered portion 182A. A part of each of the holding portions 174 is disposed around the tapered portion 183A. Each of the holding portions 174 includes an inner surface 176 disposed around the tubular portion 181, a tapered surface 177 disposed around the tapered portion 182A, and a tapered surface 178 disposed around the tapered portion 183A.

[0243] As illustrated in FIG. 34, at least a part of each of the protruding portions 1301 is inserted into the tubular portion 181. Each of the protruding portions 1301 includes a large diameter portion 1303 and a small diameter portion 1304 protruding upward from the upper end portion of the large diameter portion 1303. In the plane orthogonal to the central axis CX, a dimension (an outer diameter) of the large diameter portion 1303 is larger than a dimension (an outer diameter) of the small diameter portion 1304. The central axis of the large diameter portion 1303 and the central axis CX of the damping member 180 coincide with each other. The central axis of the small diameter portion 1304 and the central axis CX of the damping member 180 coincide with each other. A step 1305 is provided between the upper end portion of the large diameter portion 1303 and the lower end portion of the small diameter portion 1304. At least a part of the protruding portion 1301 is disposed in the opening 184 of the damping member 180.

[0244] In the present embodiment, the damping member 180 is inserted into the opening 175 from the lower side or the upper side of the holding portion 174. As explained above, the plurality of grooves 187 are provided in the first flange portion 182 and the plurality of grooves 188 are provided in the second flange portion 183. The grooves 187 enable the first flange portion 182 to be flexurally deformed to decrease in diameter. The grooves 188 enable the second flange portion 183 to be flexurally deformed to decrease in diameter. An assembly worker of the suction head 103 inserts the damping member 180 into the opening 175 from the lower side of the holding portion 174 in a state in which the first flange portion 182 is flexurally deformed to decrease in diameter. The assembly worker of the suction head 103 may insert the damping member 180 into the opening 175 from the upper side of the holding portion 174 in a state in which the second flange portion 183 is flexurally deformed to decrease in diameter. After the damping member 180 is inserted into the opening 175 of the holding portion 174, the small diameter portion 1304 of the protruding portion 1301 is inserted into the opening 184 from the lower end portion of the opening 184. The damping member 180 is positioned in the protruding portion 1301 by the step 1305. The first flange portion 182 is sandwiched by the tapered surface 177 of the holding portion 174 and the lower surface of the washer 117 in the up-down direction. The second flange portion 183 is sandwiched by the tapered surface 178 of the holding portion 174 and the upper surface of the large diameter portion 1303 in the up-down direction.

[0245] As illustrated in FIG. 34, each of the damping members 180 includes a first contact surface 185 that is in contact with the first member Q1 and a second contact surface 186 that is in contact with the second member Q2.

[0246] As illustrated in FIG. 34, the first contact surface 185 includes: an outer surface 185A of the tubular portion 181; an outer surface 185B (a first surface) of the tapered portion 182A of the first flange portion 182; and an outer surface 185C (a second surface) of the tapered portion 183A of the second flange portion 183. The outer surface 185A, the outer surface 185B, and the outer surface 185C face in directions different from one another.

[0247] The outer surface 185A of the tubular portion 181 faces the radial direction outer side of the central axis CX. The outer surface 185A is parallel to the central axis CX. The outer surface 185A is in contact with the inner surface 176 of the holding portion 174.

[0248] The outer surface 185B of the tapered portion 182A is inclined upward toward the outer side in the radial direction of the central axis CX. The outer surface 185B is inclined with respect to the central axis CX. The outer surface 185B is in contact with the tapered surface 177 of the holding portion 174.

[0249] The outer surface 185C of the tapered portion 183A is inclined downward toward the outer side in the radial direction of the central axis CX. The outer surface 185C is inclined with respect to the central axis CX. The outer surface 185C is in contact with the tapered surface 178 of the holding portion 174.

[0250] As illustrated in FIG. 34, the second contact surface 186 includes: an inner surface 186A of the tubular portion 181; an upper surface 186B (a third surface) of the first flange portion 182; and a lower surface 186C (a fourth surface) of the second flange portion 183. The inner surface 186A, the upper surface 186B, and the lower surface 186C face in directions different from one another.

[0251] The inner surface 186A of the tubular portion 181 faces inward in the radial direction of the central axis CX. The inner surface 186A is parallel to the central axis CX. The inner surface 186A is in contact with the outer surface of the small diameter portion 1304 of the protruding portion 1301.

[0252] The upper surface 186B of the first flange portion 182 faces upward. The upper surface 186B is orthogonal to the central axis CX. The upper surface 186B is in contact the lower surface of the washer 17.

[0253] The lower surface 186C of the second flange portion 183 faces downward. The lower surface 186C is orthogonal to the central axis CX. The lower surface 186C is in contact with the upper surface of the large diameter portion 303.

[0254] As explained above, in the present embodiment, the damping members 180 damp vibration of the suction head 103 including the first member Q1 and the second member Q2. Each of the damping members 180 includes the first contact surface 185 that is in contact with the first member Q1 and the second contact surface 186 that is in contact with the second member Q2. The first contact surface 185 is in contact with the first member Q1 and includes the outer surface 185A, the outer surface 185B, and the outer surface 185C facing in directions different from one another.

[0255] In the configuration explained above, since the first contact surface 185 includes the outer surface 185A, the outer surface 185B, and the outer surface 185C facing in directions different from one another, a contact area of the damping members 180 and the first member Q1 increases. Therefore, the damping members 180 can effectively damp vibration. Since the vibration is damped, noise generated from the suction head 103 is reduced.

[0256] When the first member Q1 is a vibration source, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2. Since vibration of the second member Q2 is reduced, noise generated from the suction head 103 is reduced. Since each of the first contact surfaces 185 includes the outer surface 185A, the outer surface 185B, and the outer surface 185C facing in directions different from one another, the damping members 180 can effectively damp vibration of the first member Q1 in a plurality of vibration directions even if the first member Q1 vibrates in directions different from one another. Since vibration of the second member Q2 is reduced, noise generated from the suction head 103 is reduced.

[0257] When the second member Q2 is a vibration source, the damping members 180 can damp vibration transmitted from the second member Q2 to the first member Q1. Since vibration of the first member Q1 is reduced, noise generated from the suction head 103 is reduced. Since each of the first contact surfaces 185 includes the outer surface 185A, the outer surface 185B, and the outer surface 185C facing in directions different from one another, the damping members 180 can effectively damp vibrations in a plurality of vibration directions input to the first member Q1 even if the directions of the vibrations input to the first member Q1 are different from one another. Since vibration of the first member Q1 is reduced, noise generated from the suction head 103 is reduced.

[0258] In the present embodiment, each of the second contact surfaces 186 is in contact with the second member Q2 and includes the inner surface 186A, the upper surface 186B, and the lower surface 186C facing in directions different from one another.

[0259] In the configuration explained above, when the first member Q1 is a vibration source, since the second contact surface 186 includes the inner surface 186A, the upper surface 186B, and the lower surface 186C facing in directions different from one another, the damping members 180 can effectively damp vibrations in a plurality of vibration directions even if the directions of vibrations input to the second member Q2 are different from one another.

[0260] When the second member Q2 is a vibration source, since the second contact surface 186 includes the inner surface 186A, the upper surface 186B, and the lower surface 186C facing in directions different from one another, the damping members 180 can effectively damp vibrations in a plurality of vibration directions even if the second member Q2 vibrates in directions different from one another.

[0261] In the present embodiment, each of the damping members 180 includes the tubular portion 181. The first contact surface 185 includes the outer surface 185A of the tubular portion 181. The second contact surface 186 includes the inner surface 186A of the tubular portion 181.

[0262] In the configuration explained above, when the first member Q1 is in contact with the outer surface 185A of the tubular portion 181 and the second member Q2 is in contact with the inner surface 186A of the tubular portion 181, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2.

[0263] In the present embodiment, the second contact surface 186 includes the upper surface 186B and the lower surface 186C of the damping member 180.

[0264] In the configuration explained above, when the second member Q2 is in contact with the upper surface 186B and the lower surface 186C of each of the damping members 180, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2.

[0265] In the present embodiment, each of the damping members 180 includes the opening 184 in which at least a part of the second member Q2 is disposed.

[0266] In the configuration explained above, when at least a part of the second member Q2 is disposed in the opening 184 of each of the damping members 180, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2.

[0267] In the present embodiment, each of the damping members 180 includes the tubular portion 181, the first flange portion 182 connected to one end portion of the tubular portion 181, and the second flange portion 183 connected to the other end portion of the tubular portion 181. The first contact surface 185 includes the outer surface 185A of the tubular portion 181, the outer surface 185B, which is the first surface, of the first flange portion 182, and the outer surface 185C, which is the second surface, of the second flange portion 183. The second contact surface 186 includes the inner surface 186A of the tubular portion 181, the upper surface 186B, which is the third surface, of the first flange portion 182, and the lower surface 186C, which is the fourth surface, of the second flange portion 183.

[0268] In the configuration explained above, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2.

[0269] In the present embodiment, the first flange portion 182 includes the plurality of grooves 187 provided at intervals in the circumferential direction. The second flange portion 183 includes a plurality of grooves 188 provided at intervals in the circumferential direction.

[0270] In the configuration explained above, since each of the first flange portions 182 is easily bent and deformed in the radial direction by the grooves 187, the damping members 180 can effectively damp vibration. When each of the damping members 180 is inserted into the opening 175 provided in the case 170, which is the first member Q1, from the lower side of the holding portion 174, the first flange portion 182 is easily bent and deformed to decrease in diameter. Therefore, each of the damping members 180 is easily inserted into the opening 175 from the lower side of the holding portion 174.

[0271] In the configuration explained above, since each of the second flange portions 183 is easily bent and deformed in the radial direction by the grooves 188, the damping members 180 can effectively damp vibration. When each of the damping members 180 is inserted into the opening 175 provided in the case 170, which is the first member Q1, from the upper side of the holding portion 174, the second flange portion 183 is easily bent and deformed to decrease in diameter. Therefore, each of the damping members 180 is easily inserted into the opening 175 from the upper side of the holding portion 174.

[0272] In the present embodiment, the damping members 180 are respectively disposed around the screws 116, which are the fixing members, for fixing the first member Q1 and the second member Q2.

[0273] In the configuration explained above, in a state in which the first member Q1 and the second member Q2 are fixed by the screws 116, the damping members 180 can damp vibration transmitted from the first member Q1 to the second member Q2.

[0274] In the present embodiment, each of the damping members 180 includes the tubular portion 181. The case 170 includes the holding portions 174 respectively disposed around the tubular portions 181. The base housing 130 includes the protruding portions 1301 respectively inserted into the tubular portions 181.

[0275] In the configuration explained above, the tubular portions 181 of the damping members 180 can damp vibration transmitted from the holding portions 174 of the case 170 to the protruding portions 1301 of the base housing 130. Since vibration of the base housing 130 is reduced, noise generated from the suction head 103 is reduced.

[0276] In the present embodiment, the drive unit 60 includes the motor 161. The case 170 supports the motor 161.

[0277] In the configuration explained above, when the case 170 of the motor 161 is a vibration source, the damping members 180 can damp vibration transmitted from the case 170 to the base housing 130. Since vibration of the base housing 130 is reduced, noise generated from the suction head 103 is reduced.

[0278] In the present embodiment, the suction head 103 includes: the base housing 130 including the suction port 138; the brush 134 disposed in the suction port 138; the power transmission mechanism 162 that transmits a rotational force generated by the motor 161 to the brush 134; the case 170 that supports the motor 161; and the damping members 180. The first member Q1 includes the case 170, and the second member Q2 includes the base housing 130. In the configuration explained above, when the case 170 of the motor 161 is a vibration source, the damping members 180 can damp vibration transmitted from the case 170 to the base housing 130. Since vibration of the base housing 130 is reduced, noise generated from the suction head 103 is reduced.

Third Embodiment

[0279] A third embodiment is explained. In the following explanation, components that are the same as or equivalent to the components in the embodiment explained above are denoted by the same reference numerals and signs and explanation of the components is simplified or omitted.

[0280] The third embodiment is a modification of the second embodiment. FIG. 37 is a perspective view from the left front illustrating a part of the inside of a suction head 203 according to the present embodiment. FIG. 38 is an exploded perspective view from the left front illustrating a part of the inside of the suction head 203 according to the present embodiment. FIG. 39 is a cross-sectional view illustrating a part of the suction head 203 according to the present embodiment and is equivalent to an N-N line cross-sectional arrow view of FIG. 37.

[0281] The suction head 203 includes: a drive unit 260 that rotates the brush 134; the case 170 that supports at least a part of the drive unit 260; and the damping members 180 that damp vibration of the suction head 203.

[0282] The drive unit 260 includes a motor 261 and a power transmission mechanism 262 that transmits a rotational force generated by the motor 261 to the brush 134. The case 170 supports the motor 261.

[0283] The motor 261 is an inner rotor type DC brushless motor. As illustrated in FIG. 39, the motor 261 includes a stator 247, a rotor 248, and a rotor shaft 263. The stator 247 includes a stator core 247A including a plurality of teeth, an insulator 247B fixed to the stator core 247A, and coils 247C respectively wound on the teeth of the stator core 247A via the insulator 247B. The rotor 248 is disposed radially inward of the stator 247. The rotor 248 includes a rotor core 248A and a plurality of permanent magnets 248B embedded in the rotor core 248A. The rotor shaft 263 is fixed to the rotor 248. The rotor 248 is disposed around the rotor shaft 263. The rotor shaft 263 is long in the left-right direction. The rotor 248 and the rotor shaft 263 rotate together about a rotation axis of the motor 261. The rotation axis extends in the left-right direction.

[0284] In the present embodiment, a cooling fan 250 is fixed to the left end portion of the rotor shaft 263. An intake port 170A is formed in the center of the case 170 in the left-right direction, and exhaust ports 170B are formed on a left portion of the case 170. The exhaust ports 170B are disposed around the cooling fan 250. The rotor shaft 263 rotates, whereby the cooling fan 250 rotates. The cooling fan 250 rotates, whereby air flows into the inner side of the case 170 from the intake port 170A. The air having flowed into the case 170 from the intake port 170A flows around the motor 261 and thereafter is discharged through the exhaust ports 170B. The motor 261 is cooled by the air flowing around the motor 261.

[0285] As illustrated in FIG. 39, an output shaft 264 is fixed to the left end portion of the rotor shaft 263. The output shaft 264 includes a hole into which the left end portion of the rotor shaft 263 is inserted. The left end portion of the rotor shaft 263 is inserted into the hole of the output shaft 264, whereby the rotor shaft 263 and the output shaft 264 are fixed. The rotor shaft 263 and the output shaft 264 may be integral (a single member). A right portion of the rotor shaft 263 is rotatably held by a bearing 263R. A left portion of the output shaft 264 is rotatably held by a bearing 263L. The bearing 263R and the bearing 263L are held by the case 170.

[0286] The power transmission mechanism 262 transmits a rotational force of the rotor shaft 263 of the motor 261 to the brush 134. In the present embodiment, the power transmission mechanism 262 includes an output shaft 264 coupled to the rotor shaft 263 of the motor 261, a relay shaft 265 coupled to the brush 134 via the belt 164 and the pulley 165, and a damping member 280 that is in contact with each of the output shaft 264 and the relay shaft 265.

[0287] The relay shaft 265 is disposed leftward of the output shaft 264. A right portion of the relay shaft 265 is rotatably held by a bearing 265R. A left portion of the relay shaft 265 is rotatably held by a bearing 265L. The bearing 265R and the bearing 265L are held by a head housing 231.

[0288] A part of the belt 164 is wound on the relay shaft 265. As in the second embodiment explained above, a part of the belt 164 is wound on the pulley 165 fixed to the brush 134. The structures of the belt 164 and the pulley 165 are the same as the structures of the belt 164 and the pulley 165 explained in the second embodiment explained above.

[0289] The output shaft 264 and the relay shaft 265 are coupled via the damping member 280. The damping member 280 functions as a coupling that couples the output shaft 264 and the relay shaft 265. When the rotor shaft 263 rotates and the output shaft 264 rotates, the relay shaft 265 coupled to the output shaft 264 via the damping member 280 rotates. When the relay shaft 265 rotates, the belt 164 rotates. When the belt 164 rotates, the pulley 165 rotates. When the pulley 165 rotates, the brush 134 rotates together with the pulley 165.

[0290] FIG. 40 is a perspective view from the left front illustrating the rotor shaft 263, the output shaft 264, the damping member 280, and the relay shaft 265 according to the present embodiment. FIG. 41 is an exploded perspective view from the left front illustrating the rotor shaft 263, the output shaft 264, the damping member 280, and the relay shaft 265 according to the present embodiment. FIG. 42 is a perspective view from the left rear illustrating the rotor shaft 263, the output shaft 264, the damping member 280, and the relay shaft 265 according to the present embodiment. FIG. 43 is a view of the relay shaft 265 according to the present embodiment viewed from the right. FIG. 44 is a perspective view from the right rear illustrating the damping member 280 according to the present embodiment. FIG. 45 is a view of the damping member 280 according to the present embodiment viewed from the right.

[0291] The damping member 280 is an elastic member. The damping member 280 can be elastically deformed. The damping member 280 is a flexible member. The damping member 280 can be flexurally deformed. In the present embodiment, the damping member 280 is made of rubber. The damping member 280 may be made of synthetic resin or may be a porous member such as sponge.

[0292] The damping member 280 substantially has a plate shape (a block shape). The damping member 280 includes a right surface 283 (one surface) and a left surface 284 (the other surface) facing in a direction opposite to a direction in which the right surface 283 faces. A pair of first recesses 281 is provided on the right surface 283 of the damping member 280. A pair of second recesses 282 is provided on the left surface 284 of the damping member 280.

[0293] Each of the first recesses 281 includes a bottom surface 281A facing the right, a first inner side surface 281B parallel to the central axis of the output shaft 264, a second inner side surface 281C, and a third inner side surface 281D.

[0294] Each of the second recesses 282 includes a bottom surface 282A facing the left, a first inner side surface 282B parallel to the central axis of the relay shaft 265, a second inner side surface 282C, and a third inner side surface 282D.

[0295] The output shaft 264 includes a base plate 266 and a pair of first cam portions 271 protruding leftward from the base plate 266. The first cam portions 271 are respectively inserted into the first recesses 281. Each of the first cam portions 271 includes: an end surface 271A that is in contact with the bottom surface 281A of the corresponding first recess 281; a first outer side surface 271B that is in contact with the first inner side surface 281B, a second outer side surface 271C that is in contact with the second inner side surface 281C, and a third outer side surface 271D that is in contact with the third inner side surface 281D. The left surface of the base plate 266 and the right surface 283 of the damping member 280 are in contact with each other.

[0296] The relay shaft 265 includes a base plate 267 and a pair of second cam portions 272 protruding rightward from the base plate 267. The second cam portions 272 are respectively inserted into the second recesses 282. Each of the second cam portions 272 includes: an end surface 272A that is in contact with the bottom surface 282A of the corresponding second recess 282; a first outer side surface 272B that is in contact with the first inner side surface 282B; a second outer side surface 272C that is in contact with the second inner side surface 282C; and a third outer side surface 272D that is in contact with the third inner side surface 282D. The right surface of the base plate 267 and the left surface 284 of the damping member 280 are in contact with each other.

[0297] When the output shaft 264 is regarded as the first member R1 and the relay shaft 265 is regarded as the second member R2, the damping member 280 is interposed between the first member R1 and the second member R2 such that the first member R1 and the second member R2 are not in contact with each other. The first member R1 and the second member R2 are coupled via the damping member 280. A rotational force of the first member R1 is transmitted to the second member R2 via the damping member 280.

[0298] The damping member 280 includes: a first contact surface that is in contact with the first member R1; and a second contact surface that is in contact with the second member R2.

[0299] The first contact surface of the damping member 280 includes: the bottom surface 281A that is in contact with the end surface 271A of each of the first cam portions 271; the first inner side surface 281B that is in contact with the first outer side surface 271B of each of the first cam portions 271; the second inner side surface 281C that is in contact with the second outer side surface 271C of each of the first cam portions 271; and the third inner side surface 281D that is in contact with the third outer side surface 271D of each of the first cam portions 271. The bottom surface 281A, the first inner side surface 281B, the second inner side surface 281C, and the third inner side surface 281D of each of the first recesses 281 face in directions different from one another. The first contact surface of the damping member 280 includes the right surface 283 that is in contact with the left surface of the base plate 266.

[0300] The second contact surface of the damping member 280 includes: the bottom surface 282A that is in contact with the end surface 272A of each of the second cam portions 272; the first inner side surface 282B that is in contact with the first outer side surface 272B of each of the second cam portions 272; the second inner side surface 282C that is in contact with the second outer side surface 272C of each of the second cam portions 272; and the third inner side surface 282D that is in contact with the third outer side surface 272D of each of the second cam portions 272. The bottom surface 282A, the first inner side surface 282B, the second inner side surface 282C, and the third inner side surface 282D of each of the second recesses 282 face in directions different from one another. The second contact surface of the damping member 280 includes the left surface 284 that is in contact with the right surface of the base plate 266.

[0301] As explained above, in the present embodiment, the damping member 280 includes: the right surface 283 that is one surface; the left surface 284 which is the other surface facing in a direction opposite to a direction in which the right surface 283 faces; the first recesses 281 provided on the right surface 283; and the second recesses 282 provided on the left surface 284. The first contact surface of the damping member 280 being in contact with the first member R1 includes: the bottom surface 281A of each of the first recesses 281; the first inner side surface 281B of each of the first recesses 281; the second inner side surface 281C of each of the first recesses 281; and the third inner side surface 281D of each of the first recesses 281. The second contact surface of the damping member 280 being in contact with the second member R2 includes: the bottom surface 282A of each of the second recesses 282; the first inner side surface 282B of each of the second recesses 282; the second inner side surface 282C of each of the second recesses 282; and the third inner side surface 282D of each of the second recesses 282.

[0302] In the configuration explained above, the damping member 280 can damp vibration transmitted from the first member R1 to the second member R2. The damping member 280 can transmit a rotational force of the first member R1 to the second member R2 while allowing a change in relative positions of the first member R1 and the second member R2.

[0303] As in the second embodiment explained above, in the present embodiment, the case 170 is supported by the protruding portions 1301 of the base housing 130 via the damping member 180. Because of deformation (elastic deformation or bending deformation) of the damping member 180, the case 170 is likely to swing (move) with respect to the base housing 130. Because of the swinging of the case 170, it is likely that the first member R1 (the output shaft 264) swings in the up-down direction with respect to the second member R2 (the relay shaft 265) and the first member R1 (the output shaft 264) swings in an inclination direction of the central axis of the second member R2 with respect to the second member R2 (the relay shaft 265).

[0304] The damping member 280 functions as a coupling that couples the first member R1 and the second member R2 to be relatively swingable. The damping member 280 allows a change in relative positions of the first member R1 and the second member R2. The damping member 280 can transmit a rotational force of the first member R1 to the second member R2 while allowing a change in the relative positions of the first member R1 and the second member R2.

[0305] In the present embodiment, the suction head 203 includes the base housing 130 including the suction port 138, the brush 134 disposed in the suction port 138, the drive unit 260 that rotates the brush 134, and the damping member 280. The drive unit 260 includes the motor 261, the output shaft 264 coupled to the motor 261, and the relay shaft 265 coupled to the brush 134. The first member R1 includes the output shaft 264 and the second member R2 includes the relay shaft 265.

[0306] In the configuration explained above, when the output shaft 264 is a vibration source, the damping member 280 can damp vibration transmitted from the output shaft 264 to the relay shaft 265. Since vibration of the relay shaft 265 is reduced, noise generated from the suction head 203 is reduced. The damping member 280 can transmit a rotational force of the output shaft 264 to the relay shaft 265 while allowing a change in relative positions of the output shaft 264 and the relay shaft 265.

[0307] In the present embodiment, the damping member 280 includes: the right surface 283 that is one surface; the left surface 284 that is the other surface facing a direction opposite to a direction in which the right surface 283 faces; the first recesses 281 provided on the right surface 283; and the second recesses 282 provided on the left surface 284. The output shaft 264 includes the first cam portions 271 respectively inserted into the first recesses 281. The relay shaft 265 includes the second cam portions 272 respectively inserted into second recesses 282.

[0308] In the configuration explained above, the damping member 280 can transmit a rotational force of the output shaft 264 to the relay shaft 265 while allowing a change in relative positions of the output shaft 264 and the relay shaft 265.

Fourth Embodiment

[0309] A fourth embodiment is explained. In the following explanation, components that are the same as or equivalent to the components in the embodiment explained above are denoted by the same reference numerals and signs and explanation of the components is simplified or omitted.

[0310] The fourth embodiment is a modification of the second embodiment. FIG. 46 is an exploded perspective view from the left front illustrating a case 90 according to the present embodiment. As explained in the second embodiment, the power transmission mechanism 162 includes the pulley 165 and the belt 164 wound on the pulley 165. The pulley 165 is housed in a case 90. The case 90 supports the pulley 165.

[0311] As illustrated in FIG. 46, in the present embodiment, the power transmission mechanism 162 includes damping members 380. Each of the damping members 380 has structure equivalent to the structure of the damping member 180 explained in the second embodiment explained above.

[0312] As illustrated in FIG. 46, the case 90 is fixed to the base housing 130 by screws 316. Washers 317 are in contact with the heads of the screws 316. Screw portions of the screws 316 are coupled to screw holes provided in the base housing 130. In a vibration transmission path, the washers 317, the screws 316, and the base housing 130 can be regarded as a single member. When the case 90 is regarded as the first member S1 and the washers 317, the screws 316, and the base housing 130 are regarded as the second member S2, the damping members 380 are disposed such that the first member S1 and the second member S2 are not in contact with each other. Each of the damping members 380 includes: a first contact surface that is in contact with the first member S1; and a second contact surface that is in contact with the second member S2. The first contact surface of each of the damping members 380 includes at least two contact surfaces facing in directions different from each other. The second contact surface of each of the damping members 380 includes at least two contact surfaces facing in directions different from each other.

[0313] A structure for coupling the case 90 and the base housing 130 via the damping members 380 in the present embodiment is substantially the same as the structure for coupling the case 170 and the base housing 130 via the damping members 180 in the second embodiment explained above. In the present embodiment, vibration caused by the rotation of the pulley 165 is less likely to be transmitted to the base housing 130. For that reason, generation of noise is reduced.

[0314] As explained above, in the present embodiment, each of the damping members 380 includes the first contact surface that is in contact with the first member S1 and the second contact surface that is in contact with the second member S2. The first contact surface of each of the damping members 380 is in contact with the first member S1 and includes at least two contact surfaces facing in directions different from each other.

[0315] In the configuration explained above, since the first contact surface of each of the damping members 380 includes the at least two contact surfaces facing in directions different from each other, a contact area of the damping members 380 and the first member P1 increases. Therefore, the damping members 380 can effectively damp vibration.

[0316] When the first member S1 is a vibration source, the damping members 380 can damp vibration transmitted from the first member S1 to the second member S2. Since the first contact surface of each of the damping members 380 includes the at least two contact surfaces facing in directions different from each other, the damping members 380 can effectively damp vibrations of the first member S1 in a plurality of vibration directions even if the first member S1 vibrates in different directions.

[0317] In the present embodiment, the second contact surface of each of the damping members 380 is in contact with the second member S2 and includes the at least two contact surfaces facing in directions different from each other.

[0318] In the configuration explained above, when the first member S1 is a vibration source, since the second contact surface of each of the damping members 380 includes the at least two contact surfaces facing in directions different from each other, the damping members 380 can effectively damp vibrations in a plurality of vibration directions even if the directions of vibrations input to the second member S2 are different from one another.

[0319] In the present embodiment, the power transmission mechanism 162 includes the pulley 165 and the belt 164 wound on the pulley 165. The case 90 supports the pulley 165.

[0320] In the configuration explained above, when the case 90 supporting the pulley 165 of the power transmission mechanism 162 is a vibration source, the damping members 380 can damp vibration transmitted from the case 90 to the base housing 130. For that reason, generation of noise is reduced.

OTHER EMBODIMENTS

[0321] In the embodiments explained above, the cleaning device 1 is the upright cleaning device. The cleaning device 1 may be a handy type cleaning device, may be a canister type cleaning device, may be a shoulder type cleaning device, or may be a back pack type cleaning device. The cleaning device 1 may be a sweeper, may be a scrubber, may be an extractor, or may be a robot cleaner.

[0322] Although the invention has been described with respect to specific embodiments for a complete and clear disclosure, the appended claims are not to be thus limited but are to be construed as embodying all modifications and alternative constructions that may occur to one skilled in the art that fairly fall within the basic teaching herein set forth.