Hand-Held Power Tool

Abstract

A hand-held power tool, in particular an angle grinder, includes a tool housing that includes a handle casing for holding the power tool as well as a drive casing, in particular arranged on the handle casing, for accommodating a drive unit operable in particular by means of a rechargeable battery unit. The drive unit has an input shaft, which is in particular mounted to be rotatable about an input axis, and an output shaft, which is in particular mounted to be rotatable about an output axis.

Claims

1. A hand-held power tool, comprising: a tool housing comprising: a handle casing for holding the hand-held power tool; a drive casing; and a bearing surface configured to be rested on a workpiece to be machined; and a drive unit accommodated in the drive casing, the drive unit comprising: an input shaft; and an output shaft is arranged on a side of the input shaft which faces away from the handle casing.

2. The hand-held power tool according to claim 1, wherein maximum cutting depth of the hand-held power tool is adjustable depending on an angular position, of the hand-held power tool relative to the workpiece.

3. The hand-held power tool according to claim 1, wherein the maximum cutting depth is controllable by a rotational movement of the hand-held power tool about the output axis relative to a workpiece.

4. The hand-held power tool according to claim 1, wherein the tool housing has a first bearing region and a second bearing region, the first and second bearing regions each defining a respective distance from the output axis.

5. The hand-held power tool according to claim 1, further comprising: a support device configured to support the hand-held power tool in an operating state and to limit a maximum cutting depth T of the accessory device.

6. The hand-held power tool according to claim 5, wherein the support device has a first support element which is arranged on the tool housing, extends parallel to the output axis, and is spaced apart from the output shaft in an axial direction along the output axis.

7. The hand-held power tool according to claim 1, characterized by further comprising: a support device formed by a guard device of the hand-held power tool, the support device configured to support the hand-held power tool in an operating state.

8. The hand-held power tool according to claim 1, further comprising: a bearing housing configured to surround, at least in portions, two housing half-shells that form the tool housing and to connect the two housing half-shells in a form-fitting manner.

9. The hand-held power tool according to claim 8, wherein the bearing housing is configured to cover a recess in the housing half-shells and/or has a guide device configured to accommodate a guard device and to mount the guard device to be movable about the output axis.

10. The hand-held power tool according to claim 1, wherein the tool housing defines an air inlet opening and an air discharge opening, which are arranged adjacent to one another with an air deflecting web separating the air inlet opening from the air discharge opening.

11. The hand-held power tool according to claim 1, wherein the drive casing has a height in a plane running parallel to the input axis and the output axis, and the accessory device has a maximum diameter, the height of the drive casing being greater than the maximum diameter of the accessory device.

12. The hand-held power tool according to claim 1, wherein the output axis of the output shaft intersects the drive unit.

13. The hand-held power tool according to claim 1, further comprising: a gear unit comprising a spur gear element of the output shaft, wherein: the tool housing defines a recess configured to at least partially accommodate the spur gear element; and/or the spur gear element projects at least in portions in a radial direction relative to the recess and/or housing half-shells which form the tool housing.

14. The hand-held power tool according to claim 1, further comprising: a bearing unit configured to mount the output shaft relative to the drive unit with a section extending transversely to the output axis through the bearing unit intersecting the input shaft and the output shaft.

15. A system comprising: a hand-held power tool comprising: a tool housing comprising: a handle casing for holding the hand-held power tool; a drive casing; and a bearing surface configured to be rested on a workpiece to be machined; and a drive unit accommodated in the drive casing, the drive unit comprising: an input shaft; and an output shaft arranged on a side of the input shaft which faces away from the handle casing; and an accessory device, wherein the accessory device projects in a radial direction relative to the drive casing on a side of the hand-held power tool facing away from the handle casing and/or does not project in the radial direction relative to the drive casing on a side of the hand-held power tool facing the handle casing.

16. The hand-held power tool according to claim 1, further comprising a battery unit via which the drive unit is operated, wherein: the hand-held power tool is an angle grinder; the drive casing is arranged on the handle casing; and wherein the input shaft is rotatably mounted about an input axis and the output shaft is rotatably mounted about an output shaft.

17. The hand-held power tool according to claim 5, wherein the support device is formed by the tool housing.

18. The hand-held power tool according to claim 6, wherein the first support element is arranged on a housing half-shall of the tool housing.

19. The hand-held power tool according to claim 14, wherein the bearing unit is configured to mount the output shaft relative to the input shaft with the section extending perpendicularly to the output axis through the bearing unit.

20. The system according to claim 15, wherein the accessory device is a cutting disk.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0137] Further advantages result from the following description of the drawings. Exemplary embodiments of the invention are shown in the drawings. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently also consider the features individually and combine them to form meaningful further combinations. In the drawings:

[0138] FIG. 1 shows a view of a hand-held power tool according to the invention,

[0139] FIG. 2 shows a further view of a hand-held power tool,

[0140] FIG. 3 shows a section through the hand-held power tool,

[0141] FIG. 4 shows a further view of a hand-held power tool,

[0142] FIG. 5 shows a further view of a hand-held power tool,

[0143] FIGS. 6 to 10 each show a view of the tool housing,

[0144] FIGS. 11 to 15 each show a view of the hand-held power tool,

[0145] FIG. 16 shows a view of a guard device,

[0146] FIG. 17 shows a view of a bearing housing,

[0147] FIGS. 18 to 20 show a view of a hand-held power tool,

[0148] FIG. 21 shows a section through the hand-held power tool,

[0149] FIGS. 22 to 24 each show a further view of a hand-held power tool,

[0150] FIG. 25 shows a section through a hand-held power tool,

[0151] FIGS. 26 to 28 show a view of the hand-held power tool.

[0152] FIG. 29 shows a section through a hand-held power tool.

[0153] In the following figures, identical components are provided with the same reference signs.

[0154] FIG. 1 shows a hand-held power tool 11 designed as an angle grinder with a drive unit 13, which is arranged differently from a conventional angle grinder 11, so that an output axis 15 is not arranged transversely, in particular at 90, relative to an input axis 17 of the drive unit 13; instead, they are arranged substantially concentrically or parallel to one another. In the case of concentrically arranged axes, the output axis 15 and the input axis 17 substantially coincide during operation of the hand-held power tool 11. As a result, a direct drive can be realized in which an input shaft 19 directly drives the cutting disk 31 without the interposition of a gear unit 23. With axes arranged in parallel, the output axis 15 and the input axis 17 are arranged parallel to one another. In this case, an input shaft 19 and an output shaft 21 arranged parallel to the input shaft 19 can preferably be provided and be coupled by means of a gear unit 23.

[0155] The hand-held power tool 11 can have a tool housing 25 with a handle casing 27 and a drive casing 29 arranged on the handle casing 27. The handle casing 27 is arranged perpendicular to the drive casing 29, and the intention is thus for the operator to hold the hand-held power tool with one hand. The tool housing 25 is T-shaped in that the drive casing 29 is arranged centrally or eccentrically on the handle casing 27. The drive casing 29 projects on both sides in the axial direction along the input axis relative to the handle casing 27. The T shape allows the hand-held power tool 11 to be gripped firmly. In addition, a safety distance is created between the cutting disk 31 and the hand or finger gripping around the hand-held power tool 11.

[0156] The drive casing 29 is provided for accommodating the drive unit 13. The drive unit 13 has an input shaft 19 mounted to be rotatable about an input axis 17 and an output shaft 21 mounted to be rotatable about an output axis 15. The output shaft 21 is provided for accommodating a cutting disk 31 and driving it in the circumferential direction U about the output axis 15.

[0157] The drive unit 13 has an electric motor 33 with a rotational speed in a range of more than 17,000 revolutions per minute. The electric motor 33 is electronically commutated (EC drive).

[0158] The cutting disk 31 is provided for cutting and/or grinding workpieces and can be used universally, which results in a suitability for machining workpieces made of cellulose, for example grass, brush or roots, wood, plastic or a composite. The cutting disk 31 is likewise also suitable for machining, for example, metal, rock or a composite.

[0159] The cutting disk 31 is provided for detachable accommodation on rotationally driven, commercially available hand-held power tools 11. The cutting disk 31 can be accommodated in a receptacle device of a hand-held power tool 11, preferably a hand-held power tool 11 with a rotational and/or translational movement on a workpiece to be machined, which device is already known to a person skilled in the art and is designed to accommodate the cutting disk 31.

[0160] The cutting disk 31 projects in the radial direction relative to the drive casing 29 on a side 35 of the hand-held power tool 11 facing away from the handle casing 27 and is set back, or does not project, in the radial direction relative to the drive casing 29 on a side 37 of the hand-held power tool 11 facing the handle casing 27, as a result of which particularly secure and reliable handling of the hand-held power tool 11 is made possible.

[0161] The tool housing 25 has two housing half-shells 41a, 41b, which are connected to one another along a connecting plane Ve. Each housing half-shell 41a, 41b has a handle casing portion 27a and a drive casing portion 29a, wherein the two housing portions 27a, 29a of a housing half-shell 41a, 41b are integrally formed and merge into one another. The handle casing 27 is arranged on the drive casing 29. The handle casing 27 is delimited by the drive casing 29. The drive casing 29 is arranged substantially perpendicular to the handle casing 27.

[0162] The drive casing 29 is substantially hollow-cylindrical and extends substantially along the output axis 15 and the input axis 17. In a section running substantially perpendicular to the input axis 17 or a side view (FIGS. 6 to 10), the drive casing 29 is substantially elliptical in shape in order to accommodate the input shaft 19 and the output shaft 21 parallel to one another. The output shaft 21 is arranged eccentrically on the tool housing 25 in order to maximize a cutting depth T of the cutting disk 31. For this purpose, the output axis 15 is arranged in the radial direction on a drive casing 29 limiting the cutting depth T in such a way that the cutting disk 31 projects from the tool housing 25 on a first side 35 and does not project from the tool housing 25 on a second side 37 facing away from the first side 35.

[0163] The hand-held power tool 11 has a rechargeable battery unit 39 or battery unit 39. The battery unit 39 is designed as a power source for supplying the hand-held power tool 11 with electrical power. The battery unit 39 is arranged in the handle casing 27 and surrounded by the handle casing 27. The battery unit 39 is arranged in a fixed or non-removable manner in the tool housing 25, and removal of the battery unit 39 is conceivable by disassembling the tool housing 25.

[0164] The battery unit 39 extends along an axis which coincides with a longitudinal axis L of the tool housing 25 or of the handle casing 27. The drive unit 13 extends along an axis which coincides with a transverse axis Q of the tool housing 25 or of the drive casing 29. The longitudinal axis L is arranged at an angle of up to a tolerance deviation of exactly 90 relative to the transverse axis Q by (FIG. 1, 2).

[0165] The tool housing 25 has a bearing region 99 with a bearing surface 43 for resting on a workpiece to be machined, wherein the bearing surface 43 is arranged closer to the output axis 15 than to the input axis 17. In particular, the output axis 15 of the output shaft 21 has a first distance A1 relative to a bearing surface 43 of the tool housing 25, and the input axis 17 of the input shaft 19 has a second distance A2 relative to the bearing surface 43 of the tool housing 25, the second distance being more than 180% greater and less than 250% smaller than the first distance (FIG. 3; in a section through the connecting plane Ve). The second distance A2 can be approximately 200% relative to the first distance A1. The second distance A2 is greater than the first distance A1. The output axis 15 and the input axis 17 are arranged parallel to one another and preferably lie in a plane or the connecting plane Ve. In order to maximize a cutting depth T of the accessory device 31, the output shaft 21 is arranged directly adjacent and preferably parallel to the bearing surface 43 of the tool housing 25. The output shaft 21 is arranged at least in the connecting plane Ve between the input shaft 19 and the bearing surface 43 of the tool housing 25. The output shaft 21 is arranged parallel to the input shaft 19 and is radially spaced apart from the input shaft 19. The output shaft 21 is arranged on a side 35 of the input shaft 19 facing away from the handle casing 27.

[0166] The bearing surface 43 extends in the axial direction along the output axis 15 and in the circumferential direction U around the output axis 15 along the drive casing 29. The bearing surface 43 is formed on an end face of the tool housing 25 and is provided as a contact surface of the hand-held power tool 11 for contacting a workpiece to be machined, which preferably contacts the workpiece during a machining operation. The bearing surface 43 limits a maximum extension of the drive casing 29. The bearing surface 43 extends on an outer side of the tool housing 25 around the output axis 15. The bearing surface 43 limits a maximum cutting depth T. The bearing surface 43 is arranged in a kind of slipstream of the accessory device when viewed in the axial direction along the output axis 15. The accessory device 31 covers the bearing surface 43 in the axial direction along the output axis 15. The bearing surface 43 is flat in portions and curved in portions. In particular in the circumferential direction U around the output axis 15, the bearing surface 43 is curved in portions and is flat in portions. The drive casing 29 can have two flat bearing surfaces 43 in the circumferential direction U which delimit at least one curved bearing surface 43.

[0167] The drive casing 29 has a height H in a plane extending parallel to the input axis 17 and the output axis 15, or the connecting plane Ve, and the output axis 15 has a distance A1 relative to the bearing surface 43, wherein the height H of the drive casing 29 is more than 200% and less than 250% greater than the distance (FIG. 3). The drive casing 29 has a height H in a plane extending parallel to the input axis 17 and the output axis 15, or the connecting plane Ve, and the accessory device 31 has a maximum diameter D, wherein the height H of the drive casing 29 is greater than the diameter D of the accessory device 31.

[0168] The hand-held power tool 11 has a gear unit 23, which is provided to connect the output shaft 21 to the input shaft 19. The gear unit 23 is designed as a spur gear unit 23 and has a gear ratio of approximately 3. The output shaft 21 has a spur gear element 23b with a diameter which is larger than a spur gear element 23a of the input shaft 19. The spur gear element 23b of the output shaft 21 extends in the radial direction at least in portions through the housing half-shells 41a, 41b.

[0169] The output axis 15 of the output shaft 21 is spaced apart in the radial direction with respect to the input axis 17 such that the output axis 15 or an extension of the output axis 15 intersects the electric motor 33 of the drive unit 13 or a stator of the electric motor 33. The output shaft 21 is arranged parallel to the input shaft 19 or is spaced apart therefrom such that the output axis 15 is arranged or runs between the input axis 17 and a maximum radial extension of the electric motor 33, in particular the stator of the electric motor 33.

[0170] The output shaft 21 projects in the radial direction in portions relative to a maximum extension of the drive unit 13. The spur gear element 23b of the output shaft 21 projects in the radial direction relative to the input axis 17, in portions relative to the electric motor and the drive unit 13. The output shaft 21 extends in the radial direction in such a way that a plane formed by a maximum radial extension of the drive unit 13 lies between a plane formed by the output axis 15 and a plane formed by the maximum radial extension of the output axis 15. The planes are arranged parallel to one another. The output shaft 21 has a first bearing portion 24a, which is provided for accommodating a bearing element, and a second bearing portion 24b, which is provided for accommodating the spur gear element 23b. The first bearing portion 24a has a first diameter, and the second bearing portion 24b has a second diameter, the second diameter being greater than the first diameter. The second bearing portion 24b projects at least in portions in the radial direction relative to the drive unit 13.

[0171] The housing half-shells 41a, 41b have a recess 51, which is provided to at least partially accommodate a spur gear element 23b of the output shaft 21. The housing half-shells 41a, 41b delimit the recess 51 or surround it by 360 in one plane. The recess 51 extends in the circumferential direction U around the output axis 15 from a first housing half-shell 41a to a second housing half-shell 41b. The recess 51 is arranged on the connecting plane Ve of the first housing half-shell 41a and the second housing half-shell 41b. The spur gear element 23b extends at least in portions through the recess 51 or into the recess 51. The recess 51 can form an inspection opening for servicing the hand-held power tool 11. The recess 51 is provided to create a cavity in order to accommodate the spur gear element 23b and to arrange the output shaft 21 as close as possible to the bearing surface 43, in particular to increase a cutting depth T. The recess 51 is arranged on a side 35 facing away in front of the handle casing 27 or on a cutting side of the drive casing 29.

[0172] The spur gear element 23b projects at least in portions in the radial direction relative to the recess 51 and/or the housing half-shells 41a, 41b forming the tool housing 25.

[0173] The tool housing 25 has a bearing housing 55, which is provided to at least partially surround the housing half-shells 41a, 41b. The bearing housing 55 is provided to hold the housing half-shells 41a, 41b together and to position them or to fix them relative to each other. The bearing housing 55 is connected by means of two screw connections 57a, 57b to the first housing half-shell 41a and to the second housing half-shell 41b. The screw connections 57a, 57b each have screw axes Sa which are arranged parallel to the output axis 15 and to the input axis 17. The screw axes Sa are connected, parallel to a connecting plane Ve that separates the housing half-shells 41a, 41b, to the housing half-shells 41a, 41b by means of the screw connections 57a, 57b. A screw connection 57a, 57b is provided in each case, which connects the bearing housing 55 to a housing half-shell 41a, 41b in each case.

[0174] The bearing housing 55 has a substantially hollow-cylindrical bearing receptacle and the housing half-shells 41a, 41b form a substantially hollow-cylindrical housing portion, wherein the bearing receptacle is provided for accommodating the housing portion of the housing half-shells 41a, 41b and to secure them in the radial direction in a form-fitting manner. The substantially hollow-cylindrical housing portions are provided to surround the output shaft 21.

[0175] The bearing housing 55 or the bearing receptacle is provided to surround the housing portion of the housing half-shells 41a, 41b in a radial plane of the output axis 15 by 360. In a connected state, the housing half-shells 41a, 41b or the housing portions form a housing opening 59 in the drive casing 29, which housing opening is delimited by the housing half-shells 41a, 41b. The housing opening 59 is at least substantially cylindrical and is provided for accommodating and preferably mounting the output shaft 21. The housing opening 59 is provided to guide the output shaft 21 out of the drive casing 29.

[0176] The two housing half-shells 41a, 41b form a housing wall 61 which delimits the housing opening 59 in the drive casing 29. The housing wall 61 is of hollow-cylindrical design and extends in the axial direction along the output axis 15. The housing wall 61 is formed from two substantially semi-hollow-cylindrical housing portions of the two housing half-shells 41a, 41b. The housing wall 61 extends axially along the output axis 15 and projects outward on the tool housing 25.

[0177] The bearing housing 55 covers the housing half-shells 41a, 41b in an axial direction along the output axis 15 by at least 10%, in particular at least 20%, preferably at least 30%, preferably at least 40%. The bearing housing 55 is provided to at least partially surround the housing wall 61 and the housing half-shells 41a, 41b.

[0178] The bearing housing 55 is provided to form-fittingly hold or hold together the housing half-shells 41a, 41b in the radial direction relative to the output axis 15 and to position or fix them relative to each other. The bearing housing 55 is connected to the first housing half-shell 41a and to the second housing half-shell 41b by means of a screw connection 57a, 57b in the axial direction parallel to the output axis 15. The screw connection 57a, 57b has a screw axis Sa which is formed parallel to the output axis 15 and to the input axis 17.

[0179] The bearing housing 55 is provided to cover the recess 51 and the spur gear unit 23 or the spur gear element 23b. The recess 51 is completely covered by the bearing housing 55, as a result of which the cutting depth T can be further optimized. To cover the recess 51, the bearing housing 55 has a housing extension 63. The housing extension 63 extends in the axial direction along the output axis and along a connecting plane Ve of the two housing half-shells 41a, 41b. The housing extension 63 is provided to cover the recess 51 in such a way that the spur gear element 23b arranged in the recess 51 is protected against accidental access by an operator. The housing extension 63 can form a bearing surface for supporting the hand-held power tool 11, which bearing surface is set back in portions, preferably completely, relative to the bearing surface 43 of the housing half-shell or the housing half-shells.

[0180] The drive casing 29 is double-walled in the region of the output shaft 21. The drive casing 29 is double-walled in a tool housing portion in which the output axis 15 exits from the tool housing 25. The tool housing 25 is double-walled in a portion in which the half-shell housing is covered by the bearing housing 55. The double-walled tool housing portion 25 extends in the axial direction along the output axis 15 and surrounds it. A first wall is formed by the housing wall 61 of the tool housing 25 or the two housing half-shells 41a, 41b. A second wall is formed by the bearing receptacle of the bearing housing 55. The bearing receptacle is arranged coaxially around the housing wall 61.

[0181] The tool housing 25 has a single-wall design on a side of the drive casing 29 facing away from the double-walled tool housing portion in the axial direction, in the region of the recess 51.

[0182] The bearing housing 55 has a form-fit element 69 which is provided to hold a guard device 65 in the axial direction along the output axis 15 in a form-fitting manner on the bearing housing 55. The form-fit element 69 extends in the radial direction toward the output axis 15. The form-fit element 69 is designed to be partially circular in relation to the output axis and limits an extension of the bearing housing 55 in the axial direction along the output axis 15. The form-fit element 69, 71 has a form-fit surface 73 which contacts the guard device 65 in order to hold the guard device 65 in a form-fitting manner on the bearing housing 55. The form-fit surface 73 has a surface normal which is oriented in a direction facing the hand-held power tool 11. The form-fit element 69 is provided to delimit the bearing housing 55.

[0183] The bearing housing 55 has a guide device 79 which is provided for accommodating a guard device 65 and mounting it to be movable about the output axis 15. The guide device 79 extends in the circumferential direction U around the output axis 15. The guide device 79 has a guide recess 81 which extends in the axial direction along the output axis into the tool housing 25 and then in the radial direction relative to the output axis 15. The guide recess 81 is L-shaped in a connecting plane Ve. The guide recess 81 is provided for accommodating a form-fit element 71 of the guard device 65 and to be delimited by the form-fit element 69. The guide recess 81 is formed by the form-fit element 69.

[0184] The input shaft 19 is mounted in a floating manner and has a fixed or mounted end 83 and a free or loose end 85 remote from the fixed or mounted end 83. The tool housing 25 has no support structure which supports the input shaft 19 on a side of the input shaft 19 facing away from the gear unit 25. The spur gear element 23b is arranged at the loose end 85. The spur gear element 23b projects in the axial direction along the input axis relative to the input shaft 19.

[0185] The hand-held power tool 11 has a bearing unit 87, which is provided to mount the output shaft 21 relative to the input shaft 19. The bearing unit 87 is connected in a rotationally fixed manner to a motor housing 187 of the electric motor 33. The bearing unit 87 is form-fittingly connected to the electric motor 33 by means of a screw connection. The bearing unit 87 has a first bearing point 91, which is provided to mount the output shaft 21. The first bearing point 91 is provided for accommodating a bearing element designed as a roller bearing element. The bearing unit 87 has a second bearing point 93, which is provided for directly or indirectly mounting the input shaft 19. The second bearing point 93 is provided for accommodating a bearing element of the input shaft 19 designed as a roller bearing element, or the motor housing 187 of the electric motor 33s. The bearing unit 87 is connected in a form-fitting manner to the motor housing 187 of the electric motor 33. The motor housing 187 of the drive unit 13 has a tubular bearing lobe 95 which extends in the axial direction and delimit the motor housing 187. The bearing lobe 95 is provided for accommodating and surrounding the input shaft 19. The bearing lobe 95 is provided for accommodating a bearing element designed as a roller bearing element and for mounting it around the input axis 17. The second bearing point 93 accommodates the bearing lobe 95 and connects it in a form-fitting manner in the radial direction. The bearing lobe 95 is provided on the one hand to accommodate in an inner region the bearing element for mounting the input axis 17 and to be accommodated in an outer region by the second bearing point 93.

[0186] The motor housing 187 further comprises two connecting means designed as a connection thread, which are provided to connect the bearing unit 87 to the motor housing 187 by means of a screw connection.

[0187] A section through the bearing unit 87 running perpendicular to the output axis 15 intersects the bearing element of the output axis 15 and the bearing element of the input axis 17. The first and the second bearing point 91, 93 are arranged parallel to one another. The bearing unit 87 separates the first bearing point 91 from the second bearing point 93.

[0188] The tool housing 25 can be designed in such a way that a maximum cutting depth T of the hand-held power tool 11 to be achieved is adjustable depending on an angular position alpha of the hand-held power tool 11 relative to a workpiece to be machined. The angular position alpha is to be understood here as a position of the hand-held power tool which results from a movement of the hand-held power tool about the output axis or in a cutting plane.

[0189] A maximum cutting depth T to be achieved can be controlled by means of a rotational movement of the hand-held power tool 11 or the tool housing 25 of the hand-held power tool 11 relative to the workpiece. A rotation of the hand-held power tool 11 about the input axis 17 or about an output axis 15 is considered as a rotational movement. A rolling movement can be regarded as a rotational movement, in which the hand-held power tool 11 rolls on a bearing surface 43 of the housing half-shell(s) 41a, 41b approximately about the input axis 17 or the output axis 15. The rotational movement of the hand-held power tool 11 can change an angular position alpha of the hand-held power tool 11 in the circumferential direction U around the output axis 15 relative to the workpiece to be machined, as a result of which the maximum cutting depth T can be changed. Depending on the changed angular position alpha, an angle of the hand-held power tool 11 relative to the workpiece changes, as a result of which a cutting depth T is limited, maintained or released.

[0190] For example, in the case of a first angular position alpha of the hand-held power tool 11, a first maximum cutting depth T can be achieved and, in the case of a second angular position alpha of the hand-held power tool 11, a second maximum cutting depth T can be achieved, wherein the first cutting depth T is greater than the second cutting depth T (FIGS. 6 to 10).

[0191] For example, the first maximum cutting depth T can be achieved by the hand-held power tool 11 being provided in a first angular position alpha in which the hand-held power tool 11 is arranged perpendicular to a workpiece surface and assumes an angle of approximately 90 or an angle range of 90 to 40. In this case, a maximum cutting depth T of approximately 14 mm can be achieved (FIGS. 7 to 8, FIG. 11).

[0192] For example, the second maximum cutting depth T can be achieved by the hand-held power tool 11 being provided in a second angular position alpha in which the hand-held power tool 11 is arranged transversely to the workpiece surface and assumes an angle of approximately 30 or an angle range of less than 30 and in particular 30 to 15. In this case, a maximum cutting depth T of approximately at most 12.4 or at most 10 mm can be achieved (FIG. 9, FIG. 10).

[0193] The tool housing 25 is designed such that a plurality of angular positions alpha can be assumed by means of a rotational movement of the tool housing 25 about the output axis relative to a workpiece. The tool housing 25 is designed such that the cutting depth T can be controlled by means of a rotational movement of the tool housing 25 about the output axis 15 relative to a workpiece.

[0194] The tool housing 25 has a first bearing region 97 and a second bearing region 99, wherein the bearing regions 97, 99 each define a distance of the bearing regions 97, 99 from the output axis 15. The bearing regions 97, 99 are designed as bearing edge portions or as bearing surface portions. The bearing regions 97, 99, in particular the bearing surface portions, have a flat design. The first bearing region 97 is spaced apart from the second bearing region 99.

[0195] The first bearing region 97 is designed as a flat first bearing surface 43 which extends at least substantially tangentially to a bearing region 97, 99 of the tool housing 25 that defines the maximum cutting depth T.

[0196] The first bearing region 97 has a first curved bearing region portion 97a and a second flat bearing region portion 97b. The first bearing region portion 97a adjoins the second bearing region portion 97b in the circumferential direction U around the tool housing 25. The first bearing region portion 97a and the second bearing region portion 97a are provided to space the hand-held power tool 11 apart from the workpiece in such a way that the same or a constant maximum cutting depth T is achieved. The first bearing region portion 97a has a first bearing point with a first distance from the output axis 15. The second bearing region portion 97b has a second bearing point with a second distance from the output axis 15. The first bearing point is arranged at a distance from the second bearing point in the circumferential direction U around the output axis 15. In particular, the second distance is greater than the first distance. The first bearing region portion 97a and the second bearing region portion 97b each have a bearing point which has the same distance from the output axis 15. This bearing point can preferably be formed by a connection point of the first bearing region portion 97a and the second bearing region portion 97b. The first bearing region portion 97a has a plurality of bearing points which are spaced apart from one another in the circumferential direction U around the output axis 15 and have the same distance from the output axis 15. The second bearing region portion 97b has a plurality of bearing points which are spaced apart from one another and are of different sizes.

[0197] The second bearing region 99 is designed as a flat second bearing surface 99a, wherein the second bearing region portion 97b of the first bearing region 97 is angled relative to the second bearing region 99, the second bearing region portion 97b and the second bearing region 99 being flat.

[0198] The second bearing region 99 has a plurality of bearing points spaced apart from one another, which each have distances to the output axis 15 that are of different sizes in relation to one another. In other words, the spaced apart bearing points of the second bearing region 99 are at different distances from the output axis 15.

[0199] The tool housing 25 is substantially symmetrical so that at least a further first and further second bearing region 99 is arranged on a side of the tool housing 25 facing away from the first and the second bearing region 97. A plane of symmetry is formed by a plane running parallel to the output axis 15 and the input axis 17 and/or a connecting plane Ve of the housing half-shells 41a, 41b.

[0200] The accessory device 31 substantially covers the second bearing region 99 in the axial direction with respect to the output axis 15. A plane delimiting the accessory device 31 in the radial direction and extending in the axial direction with respect to the output axis 15 intersects the second bearing region 99.

[0201] The tool housing 25 has an intermediate bearing region 103 with an in particular curved intermediate bearing edge and/or intermediate bearing surface, which is arranged between the first bearing region 97 and the second bearing region 99. The intermediate bearing region 103 is designed as a lobe 103.

[0202] The tool housing 25 is designed such that a first maximum cutting depth T can be achieved in an angle range of up to 140, in particular of 120, preferably of 100. For example, this can be achieved by resting the tool housing 25 on the first bearing region 97. As can be seen in FIG. 7 and FIG. 8, an angular range can tilt from an angular position alpha of the hand-held power tool 11 of 90 to an angular position alpha of 40, that is to say by up to 60, and maintain a first maximum cutting depth T, such as 14 mm. Taking into account the symmetry, it is possible to infer an angular range of 120 in which the first maximum cutting depth T (14 mm) can be achieved.

[0203] As can also be seen in the figures, an angle range can tilt from a further angular position alpha of the hand-held power tool 11 of 40 to an angular position of 30 or 15, i.e., by up to 10 or 25, and maintain a further maximum cutting depth T, such as 12.4 mm or 9.795 mm.

[0204] The bearing regions 97, 99 are preferably not located on the bearing housing but on the housing half-shells of the tool housing or the drive casing. Accordingly, the bearing regions 97, 99 of the housing half-shells project in the radial direction relative to the output axis at least in portions relative to the bearing housing.

[0205] The hand-held power tool 11 has a support device 109, in particular formed by the tool housing 25, which is intended to support the hand-held power tool 11 while in an operating state.

[0206] The support device 109 is provided to keep the hand-held power tool 11 at a predetermined cutting angle position beta while in an operating state. By means of the support device 109, a vertical cut (cutting angle position beta of 90) is to be achieved in particular in which the accessory device 31, in particular a side surface of the accessory device 31, is oriented perpendicular to a surface of the workpiece to be machined and is held in this orientation by means of the support device 109. This vertical cut is to be maintained during a guidance of the hand-held power tool 11 along a cutting direction or along the surface of the workpiece to be machined.

[0207] The support device 109 is provided to limit a maximum cutting depth T of the accessory device 31. The support device 109 forms a cutting depth stop.

[0208] The support device 109 has a support element 111 which is arranged on the tool housing and is intended to form a support plane for supporting the hand-held power tool 11 on a workpiece to be machined. The support element 111 is designed as a support surface and preferably forms a surface contact with the workpiece to be machined. It is clear that the support surface may alternatively or additionally form a point contact or a line contact with the workpiece to be machined. The present support surface is intended to form a surface contact with the workpiece. It is clear that the support device 109 can have a single number or a plurality of support surfaces or support points or support lines. The support surface can be provided to form a bearing contact of the bearing surface 43 of the tool housing 25 against the workpiece.

[0209] The support device 109 has a first support element 111 designed as a support surface, which is arranged on the housing half-shell 41a, 41b. The first support surface is formed integrally with the housing half-shell 41a, 41b. The support surface delimits an extension of the housing half-shell 41a, 41b. The support surface is preferably formed by the first bearing region 97, 99 or the bearing surface 43. The support surface is formed by the bearing surface 43 of the first bearing region portion 97a and the second bearing region portion 97b of the first bearing region 97. Similarly to the first bearing region 97, the support surface extends in the circumferential direction U around the output axis 15 of the drive casing 29. Similarly to the first bearing region portion 97a, the support surface has a first support surface portion which is curved, in particular curved around the output axis 15. Similarly to the second bearing region portion 97b, the support surface has a second support surface portion, which is flat.

[0210] The support surface extends parallel to the output axis 15 along the output axis 15. The support surface extends orthogonally to the accessory device 31 or to a cutting plane of the accessory device 31.

[0211] The support surface is arranged on a side of the tool housing 25 of the hand-held power tool 11 facing away from the accessory device 31. The support surface extends in a range of at least 40% up to a maximum of 60% relative to a maximum extension of the drive casing parallel to the output axis 15. The maximum extension of the drive casing parallel to the output axis 15 has a first end 83 facing the accessory device 31 and a second end 85 remote from the first end 83, the support surface being arranged at the second end 85 of the drive casing 29. The support surface can preferably be spaced apart from the cutting disk 31 and from the first end 83. The support element 111 is arranged on the drive casing 29.

[0212] A support plane formed by the support element 111 is arranged parallel to the output axis 15 in order to enable a vertical cut into the workpiece.

[0213] To produce a vertical cut, a support plane formed by the support elements 111 is arranged parallel to the output axis 15.

[0214] The support element 111 extends parallel to the output axis 15 and is spaced apart from the output shaft 21 in the axial direction along the output axis 15. The support element 111 is arranged in the axial direction along the output axis 15 between a maximum extension of the input shaft 19, in particular between the bearing elements of the input shaft 19.

[0215] The support element 111 is arranged on a side 35 of the drive casing 29 facing away from the handle casing 27. A longitudinal axis L extending along the handle casing 27 intersects the first support element 111.

[0216] The hand-held power tool 11 has a guard device 65 and a support device 109 formed by the guard device 65, which is provided to support the hand-held power tool 11 in an operating state, as a result of which a tilting movement of the hand-held power tool 11 during an operating state or a cutting operation can be avoided.

[0217] The support device 109 has a further support element 113 which is arranged on the guard device 65 and is formed by the guard device 65 or is formed integrally with the guard device 65.

[0218] The second support element 113 is mounted to be rotatable relative to the first support element 111. The second support element 113 can be mounted in such a way that the second support element adapts to a support plane of the first support element by means of a rotational movement about the output axis.

[0219] The guard device 65 extends in the axial direction along the output axis 15 from a first side of the accessory device 31 to a second side of the accessory device 31 facing away from the first side. The guard device 65 surrounds the accessory device 31 in the axial direction along the output axis 15 and in the circumferential direction U around the output axis 15.

[0220] The guard device 65 has a second support element 113 which is arranged in relation to the accessory device 31 on a side of the accessory device 31 facing the tool housing 25. The guard device 65 has a third support element 115 which is arranged in relation to the accessory device 31 on a side of the accessory device 31 facing away from the tool housing 25. The second support element 113 and the third support element 115 limit an extension of the guard device 65 in the circumferential direction U around the output axis 15. The guard device has a first end 83 and a second end 85 opposite the first end 83 in the circumferential direction U around the output axis 15, a support element 113a, 113b being arranged on each of the two ends 83, 85. The two support elements 113a, 113b are arranged parallel to and spaced apart from one another. The two support elements 113a, 113b define a distance of the guard device 65 which is dimensioned such that the guard device 65 surrounds the drive casing 29 at least in portions.

[0221] The support elements 113a, 113b are designed as flat support surfaces. The support surfaces each have a surface normal which is oriented in a direction facing away from the output axis 15.

[0222] The support surface of the guard device 65 and of the tool housing 25 are arranged parallel to one another and define a support plane which is arranged substantially parallel to the output axis 15.

[0223] The guard device 65 is connected to the tool housing 25 or the bearing housing 55 in a form-fitting manner axially along the output axis 15 and radially in relation to the output axis 15 and is mounted to be movable in the circumferential direction U about the output axis 15 relative to the tool housing 25 or the bearing housing 55.

[0224] The hand-held power tool 11 has a guard device 65 with a form-fit element 71, which is provided to form a form-fitting connection with the bearing housing 55 of the tool housing 25.

[0225] The tool housing 25 has a guide device 79 designed as a guide recess 81, which is provided for accommodating the form-fit element 69 and for guiding it around the output axis 15. The guide recess 81 is L-shaped in cross section and extends in the axial direction along the output axis 15 into the tool housing 25 and then in the radial direction relative to the output axis 15. The guide device 79 extends in the shape of an arc in the circumferential direction U around the output axis 15.

[0226] The form-fit element 71 is designed as a shaped lobe 121 extending in the radial direction relative to the output axis 15 and extends in the radial direction toward the output axis 15. The shaped lobe 121 is partially circular in relation to the output axis 15 and limits an extension of the guard device 65 in the axial direction along the output axis 15. The shaped lobe 121 has a form-fit surface 75 which contacts the tool housing 25 in order to hold the guard device 65 in a form-fitting manner on the tool housing 25. The form-fit surface 75 has a surface normal which is oriented in a direction facing away from the hand-held power tool 11. The shaped lobe 121 is provided to encompass the tool housing 25 and to be guided with the guide device 79. The form-fit element 71 is provided to engage in the guide device 79 designed as a guide recess 81 or to be accommodated thereby. The form-fit surface 75 is supported on a side wall of the guide device 79 and forms therewith a form-fitting connection in the axial direction along the output axis 15. The form-fit surface 75 and the side wall extend perpendicular to the output axis 15.

[0227] The guard device 65 has a further form-fit element 71 and, as shown in FIG. 16, a total of four form-fit elements 71, which are spaced apart from the form-fit element 71 in the circumferential direction U around the output axis 15. The further form-fit elements 71 can each have a further form-fit surface 75. The form-fit surfaces 75 are arranged parallel to one another.

[0228] The form-fit elements 71 form a shaped collar 125, which extends in the circumferential direction U around the output axis 15 and assumes a partially circular extension in the circumferential direction U around the output axis 15, which by an angle of more than 210 and less than 240, for example an angle of approximately 225. The shaped collar 125 has a C-shaped extension and is formed from a plurality of form-fit elements 71 which extend in the circumferential direction U and are spaced apart from one another. The, in particular each, form-fit element 71, has an extension in the circumferential direction U around the output axis 15 and the, in particular each, form-fit element 71, has a distance in the circumferential direction U around the output axis 15 from a directly adjacent form-fit element 71, the distance being greater than the extension of the, in particular each, form-fit element 71. The, in particular each, form-fit element 71, extends in the circumferential direction U relative to the output axis 15 by an angular range of 25 to 35 and assumes, for example, an angle of approximately 30.

[0229] The guard device 65 has a guard collar 127 which is provided to surround the accessory device 31 in portions or in the axial direction along the output axis 15 and in the circumferential direction U around the output axis 15. The guard collar 127 covers the accessory device 31 from a side facing the tool housing 25 and exposes the accessory device 31 from a side facing away from this side.

[0230] The guard device 65 has a connecting element 131 that is hollow-cylindrical in portions and connects the form-fit elements 71 forming the shaped collar 125 to the guard collar 127. The connecting element 131 extends in the circumferential direction U around the output axis 15 and in the axial direction along the output axis 15 and limits a radial extension of the guard device 65. On a side facing away from the guard collar 127 and the shaped collar 125 in the radial direction, the connecting element 131 has a contact surface 135 for resting the guard device 65 on the tool housing 25. The contact surface 135 defines a contact radius and is concentric to an outer surface of the tool housing 25.

[0231] The guard device 65 has a recess 51 which is arranged in the axial direction relative to the form-fit element 71. The recess 51 is arranged in the guard collar 127 and is assigned to the form-fit element 71 or is directly opposite it.

[0232] The guard device 65 is mounted to be rotatable about the output axis 15 on the guide device 79 of the tool housing 25. The guard device 65 can assume a plurality of rotational positions relative to the tool housing 25 and can be connected in a latchable manner to the tool housing 25 in these rotational positions.

[0233] The hand-held power tool 11 has a latching device 139, which is provided to adjust or define a rotational position of the guard device 65 relative to the tool housing 25 in the circumferential direction U around the output axis 15. The latching device 139 form-fittingly limits a rotational movement of the guard device 65 in the circumferential direction U in a clockwise direction and a counterclockwise direction.

[0234] The latching device 139 has a stop element 161, 163 which limits a rotational movement of the guard device 65 relative to the tool housing 25 of the hand-held power tool 11. The stop element 161 extends in the radial direction relative to the output axis 15 and forms a stop surface in order to form a form-fit stop of the guard device 65 relative to the tool housing 25 or the bearing housing 55. The stop should preferably form a barrier with a counter stop. Analogously to the stop element 161, the latching device 139 has a further stop element 163 which limits a rotational movement of the guard device 65 relative to the tool housing 25 of the hand-held power tool 11. The stop element 161 is arranged on a first side of the guard device 65. The further stop element 163 is arranged on a second side 37 of the guard device 65 facing away from the first side 35 in the circumferential direction U. The two stop elements 161, 163 have stop surfaces which face one another in the circumferential direction U, as a result of which the stop elements 161, 163 limit a rotational movement of the guard device 65 about the output axis in the circumferential direction U by means of a counter stop element designed as a latching pin.

[0235] The latching device 139 has a first latching element 151 which is arranged on the bearing housing 55. The first latching element 151 is designed as a latching pin and extends in the axial direction along the output axis 15 and projects relative to the tool housing 25. The first latching element 151 is mounted to be movable in the axial direction along the output axis 15 by means of a spring element. The first latching element 151 is arranged in a recess 51 of the tool housing 25 and is mounted to be movable along this recess 51. The first latching element 151 is intended to extend up to the guard device 65 and to contact said guard device and preferably to exert a force thereon in an operating state.

[0236] The latching device 139 has a second latching element 153 which is arranged on the guard collar 127 of the guard device 65 and extends in the circumferential direction U around the output axis 15 along a side surface of the guard device 65. The second latching element 151, 153 has a plurality of latching portions 167 which each form a latching position of the first latching element 151. The latching portions 167 are spaced apart from one another and extend along the second latching element 153 or in the circumferential direction U. The latching portions 167 are substantially circular in cross section in order to accommodate the first latching element 151 designed as a latching pin. The second latching element 153 is limited in the circumferential direction U around the output axis 15 by the stop elements 161, 163. The latching portions 167 are formed at the latching recesses into which the first latching element 151 can engage in order to latch the guard device 65 in a rotational position.

[0237] The guard device 65 can have a groove in which the second latching element 153, in particular the latching portion, is arranged.

[0238] The guard device 65 can have an unlocking recess which is provided to move the guard device 65 or the latching element designed as a latching pin out of a clamping position.

[0239] The tool housing 25 has an air inlet opening 171 and an air discharge opening 173, which are arranged directly adjacent to one another and which are arranged on the same side of the tool housing 25 or the drive casing 29. The air openings are provided on the drive casing 29 and extend substantially in a peripheral side of the drive casing 29. The air inlet opening 171 and the air discharge opening 173 can extend substantially in the circumferential direction U around the output axis 15 and at least partially in the axial direction along the output axis 15.

[0240] It is clear that the drive unit 13 has a fan unit, in particular surrounded by a motor housing 187, which is provided to generate an air flow, in particular an air input flow and an air output flow. For this purpose, the fan unit has an air wheel element which is driven, for example, by the drive unit 13, in particular the input shaft 19, in order to generate an air flow.

[0241] The hand-held power tool 11 has an air deflecting web 181 which separates the air inlet opening 171 from the air discharge opening 173. The air deflecting web 181 is provided to delimit an extension of the air inlet opening 171 and the air discharge opening 173. The air deflecting web 181 can be arranged between two housing openings 59.

[0242] The hand-held power tool 11 has a partition wall 183 which is provided to separate an air flow of the air inlet opening 171 from an air flow of the air discharge opening 173. The partition wall 183 adjoins the air deflecting web 181 or is delimited thereby in the radial direction relative to the output axis 15. The partition wall 183 extends from the air deflecting web 181 to the drive unit 13, in particular a motor housing 187 of the electric motor 33. Furthermore, a further partition 183 can be provided, which is spaced apart from the partition wall 183 in the axial direction along the input axis 17. The partition wall 183 is arranged upstream of the air discharge opening 173 in the axial direction and the further partition 183 is arranged downstream of the air discharge opening 173 in the axial direction. The partition walls are provided for forming a flow channel or a flow chamber for an air discharge opening 173 or an air discharge flow.

[0243] The partition wall 183 extends radially inward up to the drive unit 13 or a motor housing 187 of the electric motor 33. The partition 183 can surround the drive unit 13 or the motor housing 187 of the electric motor 33 by 360 in one plane. The partition wall 183 can be provided to separate or seal off a flow chamber assigned to the air discharge opening 173 from a flow chamber assigned to the air inlet opening 171. The partition wall 183 is provided to surround the drive unit 13 by 360 in one plane.

[0244] The motor housing 187 of the drive unit 13 has an air entry opening 175 and an air exit opening 177.

[0245] The air entry opening 175 is provided to guide an air flow from the tool housing into the motor housing 187. The air entry opening 175 is arranged on an end face 35 of the motor housing 187 and is provided to guide an air flow along the input axis in the axial direction in order to cool the drive unit 13.

[0246] The air exit opening 177 is provided for conducting an air flow out of the motor housing 187 into the tool housing 25. The air exit opening 177 is arranged on a peripheral side of the motor housing 187 and is provided to guide an air flow in the radial direction relative to the input axis 17 out of the drive unit 13 in order to conduct a warm air flow as quickly as possible out of the drive unit 13 or the motor housing 187.

[0247] The drive unit 13 or the motor housing 187 has a further air entry opening 175 and a further air exit opening 177. The further air entry opening 175 is arranged on a side of the motor housing 187 facing away from the air entry opening 175. The further air exit opening 177 is arranged on a side of the motor housing 187 facing away from the air exit opening 177.

[0248] The air exit opening 177 of the motor housing 187 at least partially covers the air inlet opening 171. The air discharge opening 173 of the tool housing 25 is arranged opposite the air exit opening 177 in such a way that a section extending perpendicularly to the input axis 17 through the tool housing 25 intersects the air discharge opening 173 of the tool housing 25 and the air exit opening 177.

[0249] The air inlet opening 171 and the air discharge opening 173 are arranged on a side of the tool housing 25, in particular a drive casing 29, which faces away from an actuating element.

[0250] The tool housing 25 has a further air inlet opening 171 which is arranged on an end face 35, 37 of the drive unit 13 facing away from the air inlet opening 171 and is provided for cooling the gear unit 23, in particular the spur gear elements 23b. The air inlet opening 171 is preferably intended to provide an air flow for the further air entry opening 175 of the tool housing 25, in particular of the motor housing 187.

[0251] The tool housing 25 has two housing half-shells 41a, 41b forming the handle casing 27 with two ends 83, 85 facing away from one another and a connecting region 191 formed between the ends 83, 85, wherein the connecting region 191 is intended to connect the two housing half-shells 41a, 41b in a form-fitting and/or frictional manner by means of a snap connection.

[0252] The snap connection is formed from a snap elements 193a, 193b and a holding element accommodating the snap elements 193a, 193b. In the present case, the snap connection has two snap elements 193a, 193b which are arranged on two sides of a first housing half-shell 41a, 41b facing away from one another. The snap elements 193a, 193be project from the first housing half-shell 41a, 41b and extend in the direction of the second housing half-shell 41a, 41b, as a result of which the snap elements 193a, 193b delimit an extension of the first housing half-shell 41a, 41b. The snap elements 193a, 193b are provided to project into the further housing half-shell 41a, 41b in an assembled state and to be accommodated with the holding element designed as a counter-snap element 195.

[0253] The snap elements 193a, 193b each have a snap hook 199, which is intended to be accommodated in a holding recess of the holding element. The snap elements 193a, 193b each have a snapping means 197. The snapping means 197 is arranged between the snap hook 199 and the first housing half-shell 41a, 41b. The snapping means 197 is provided to mount the snap hook 199 resiliently. The snapping means 197 is provided to deflect the snap hook 199 elastically into a deflection state from an initial state and to return it to the initial state by means of elastic energy.

[0254] The snapping means 197 is provided to connect the second housing half-shell 41b in a form-fitting manner in a direction perpendicular to the latching means. The latching means rest against the second housing half-shell 41b and contact them directly. The snapping means 197 or the snap elements 193a, 193b can pre-tension the second housing half-shell 41a, 41b in a tensioning direction in each case which are oriented facing away from one another. In this case, a pre-tensioning can be applied to the second housing half-shell 41b by means of the first housing half-shell 41a. By means of the snap elements 193a, 193b, which extends into the second housing half-shell 41a, 41b, a lateral relative movement of the housing half-shells 41a, 41b can be particularly advantageously pre-tensioned.

[0255] The snap connection is arranged directly adjacent to a battery unit 39. By using the snap elements 193a, 193b, a very flat and space-saving connection of the two housing half-shells 41a, 41b may be realized.

[0256] A section running perpendicular to a longitudinal extension of the handle casing 27 intersects the snap connection and the battery unit 39.

[0257] The two housing half-shells 41a, 41b are connected at the two ends 83, 85 by means of a screw connection 57a, 57b.