Hand-held power tool

Abstract

A hand-held power tool, in particular an angle grinder, includes a drive unit, a machine housing, and a user interface unit. The machine housing surrounds the drive unit. The drive unit is configured to transmit a motion to an output unit. The user interface unit is configured to operate the hand-held power tool, and is either (i) positioned on an inner element of the hand-held power tool, in particular a flat outer surface of the inner element, or (ii) connected to the inner element, in particular the flat outer surface of the inner element.

Claims

1. A hand-held power tool, comprising: a drive unit configured to transmit a motion to an output unit; a machine housing that surrounds the drive unit in a first plane; an inner element completely surrounded by the machine housing in a second plane; and a user interface unit configured to operate the hand-held power tool, and at least one of (i) positioned on the inner element, and (ii) connected to the inner element.

2. The hand-held power tool of claim 1, wherein: the user interface unit is positioned on or connected to a flat outer surface of the inner element; and an inner surface of the inner element faces toward a cavity in which the drive unit is located.

3. The hand-held power tool of claim 1, wherein the inner element is one of (i) a motor housing of the drive unit, and (ii) an air guide element.

4. The hand-held power tool of claim 1, wherein the machine housing completely surrounds the user interface unit in at least one of the first plane and the second plane.

5. The hand-held power tool of claim 1, wherein: an inner surface of the user interface unit faces toward a cavity in which the drive unit is located; and the machine housing overlaps the user interface unit such that portion of the machine housing is located directly outwardly of an outer surface of the user interface unit in a plane parallel to the second plane.

6. The hand-held power tool of claim 5, wherein the machine housing overlap is on a side facing away from the inner element.

7. The hand-held power tool of claim 1, wherein the user interface unit is materially bonded to the inner element.

8. The hand-held power tool of claim 7, wherein the user interface unit is materially bonded to the inner element via at least one of adhesive bonding, positive engagement, clamping, non-positive engagement, and tensioning.

9. The hand-held power tool of claim 1, wherein the user interface unit includes: a first user interface element that includes a human-machine interface configured to actuate or indicate a function of the hand-held power tool; and a second user interface element that includes an actuating element configured to actuate the drive unit.

10. The hand-held power tool of claim 1, wherein the machine housing is formed from a shell construction, and includes a machine-housing shell.

11. The hand-held power tool of claim 1, wherein the machine housing is formed from a barrel construction, and includes a machine-housing barrel.

12. The hand-held power tool of claim 1, wherein the machine housing includes a delimitation recess configured to receive the user interface unit such that the user interface unit is viewable by a user through the delimitation recess.

13. The hand-held power tool of claim 12, wherein: an outer surface of the inner element delimits the delimitation recess; and the user interface unit is positioned on the outer surface.

14. The hand-held power tool of claim 12, wherein: an inner surface of the inner element faces toward a cavity in which the drive unit is located; and an outer surface of the inner element delimits the delimitation recess.

15. The hand-held power tool of claim 1, further comprising: a sealing element positioned in a gap between the user interface unit and the machine housing and sealing the gap between the user interface unit and the machine housing.

16. The hand-held power tool of claim 1, wherein the first plane is orthogonal to the second plane.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages become evident from the following description of the drawing. In the drawing, exemplary embodiments of the disclosure are represented. The drawings, the description and the claims contain numerous features in combination. Persons skilled in the art with expediently also consider the features singly, and combine them to form appropriate further combinations. There are shown therein:

(2) FIG. 1 a perspective view of a first embodiment of a hand-held power tool according to the disclosure,

(3) FIG. 2 a further view of the hand-held power tool from FIG. 1,

(4) FIG. 3a a portion of a further embodiment of a hand-held power tool,

(5) FIG. 3b an inner element of the portion of the hand-held power tool from FIG. 3a,

(6) FIG. 3c a further view of the portion of the hand-held power tool from FIG. 3a,

(7) FIG. 3d a perspective view of another portion of the hand-held power tool from FIG. 3a,

(8) FIG. 4 a cross section of a further portion of the hand-held power tool,

(9) FIG. 5a a perspective view of a further embodiment of yet another portion of the hand-held power tool,

(10) FIG. 5b a further view of the portion of the hand-held power tool from FIG. 5a, and

(11) FIG. 5c a perspective view of a further portion of the hand-held power tool from FIG. 5a.

DETAILED DESCRIPTION

(12) In the following description with regard to the figures, parts that are the same are denoted by the same references.

(13) The figures each relate to a cutting disk for cutting and/or grinding workpieces. The cutting disk according to the disclosure has a universal application and is suitable, in particular, for performing work on workpieces made of cellulose, such as, for example, grass, brushwood or roots, wood, plastic or a composite. Alternatively, however, the cutting disk may also be suitable for performing work on, for example, metal, rock or a composite.

(14) The cutting disk is designed to be received in a separable manner on standard commercial hand-held power tools that are driven in rotation. The cutting disk may be received in a receiving device of the hand-held power tool, known to persons skilled in the art and designed to receive the cutting disk, having a rotational and/or translational motion on a workpiece upon which work is to be performed.

(15) The disclosure is described using the example of a hand-held power tool 11 realized as an angle grinder. The held power tool 11 has a machine housing 13, which surrounds a drive unit 15, realized as an electric motor, for transmitting a motion to an output unit 17. The electric motor is preferably an EC motor. The drive unit 15 a drive shaft 19 (FIGS. 3a, 3c).

(16) The held power tool 11 has an operating element 21 realized as an On/Off switch. The operating element 21 is realized as a slide switch, and is designed to switch the drive unit 15 on or off.

(17) The held power tool 11 has a protective hood 23, which is arranged on the machine housing 13. The held power tool 11 has a grinding disk 25 that is surrounded by the protective hood 23. The held power tool 11 has an ancillary handle 27, which is arranged on the machine housing 13.

(18) The held power tool 11 has a longitudinal extent, and extends substantially along a longitudinal axis L of the held power tool 11. The longitudinal axis L may realized so as to be parallel to a drive axis An of the drive unit 15. The output unit 17 has an output axis Ab that is arranged transversely, in particular substantially perpendicularly, in relation to the drive axis An. The output unit 17 projects at least partly from the machine housing 13, such that the output unit 17 can be coupled to a tool, in particular an insert tool 25. The output unit 17 has a receiver for receiving the tool 25, in particular the insert tool, that is designed to transmit a work motion onto a workpiece on which work is to be performed.

(19) The held power tool 11 has a user interface unit 29, which is designed to operate the held power tool 11. The user interface unit 29 is arranged on a flat outer surface 33 of an inner element 31 of the held power tool 11, and preferably connected to the outer surface 33. The inner element 31, in an installed state, is surrounded by the machine housing 13. The inner element 31 is arranged in an interior surrounded by the machine housing 13. The inner element 31 is realized as an inner component. The outer surface 33 of the inner element 31 delimits the inner element 31. The outer surface 33 is flat. Alternatively, the outer surface 33 may be curved. The outer surface 33 may be designed to form a fixed or separable connection to the user interface unit 29. The outer surface 33 may have an adhesion element (not shown) that is designed to hold the user interface unit 29 on the outer surface 33 of the inner element 31 by adhesion, or bonding. The inner element 31 may have an inner recess (not shown). The inner recess may be delimited by the outer surface 33. The inner recess may be designed to receive the user interface unit 29. The user interface unit 29 may be connected to the outer surface 33 of the inner element 31 in a materially bonded manner, in particular by adhesive bonding, by positive engagement, in particular by clamping, or by non-positive engagement, in particular by tensioning.

(20) The outer surface 33 of the inner element 31 and the machine housing 13 form a separation space 35 that is designed to receive the user interface unit 29, at least substantially, and in particular to hold it on the machine housing 13 by positive engagement.

(21) The inner element 31 is realized as a motor housing (FIG. 2) of the drive unit 15 or as an air guide element 37 (FIG. 5a).

(22) Alternatively or additionally, the inner element 31 may be realized as another internal part such as, for example, an electronics unit, a switching unit, or the like.

(23) The inner element 31 is realized as a motor housing of the drive unit 15 (FIG. 2). The inner element 31 is realized as an end shield of the drive unit 15. The inner element 31 delimits the drive unit 15 in an axial direction of the drive unit 15. The inner element 31 surrounds the drive unit 15 in at least one 360° plane. The inner element 31 is formed from a metal. The inner element 31 is surrounded, at least substantially, by the machine housing 13. The inner element 31 is surrounded by a machine-housing part 13 realized as a handle housing 13a.

(24) The inner element 31 is realized as an air guide element 37, which is designed to guide an airflow, in particular a cooling airflow, through the machine housing 13 of the held power tool 11 (FIG. 5a). The air guide element 37 is substantially annular. The air guide element 37 surrounds a drive shaft of the drive unit 15. The drive shaft of the drive unit 15 extends through an annular region of the air guide element 37. The user interface unit 29 is arranged on a side of the air guide element 37 that faces away from the airflow (not shown). The air guide element 37 may contact the transmission housing 13b (FIGS. 5b, 5c). The air guide element 37 may be part of a connection point 39 of the machine housing 13 realized as a handle housing 13a, in order to form a connection to the machine housing 13 realized as a transmission housing 13b. The air guide element 37 forms a flow connection, of the machine housing 13 realized as a handle housing 13a, to the machine housing 13 realized as a transmission housing 13b. The transmission housing 13b in this case has ventilation openings 41, which are designed to form an airflow out of the machine housing 13, into the machine housing 13.

(25) The air guide element 37 has a support element 38, which is designed to hold an electric line 43 for electrically connecting the user interface element to an electronics unit 50 and/or to the drive unit 15. The support element extends along a longitudinal extent of the held power tool 11. The support element 38 is realized as a support bar. The support element 38 may extend from the annular region of the air guide element 37, along the longitudinal axis of the held power tool 11. The support element 38 has two clamping means 45 that are designed to clamp the electric line 43. The clamping means 45 may be designed to bundle or hold the electric line 43 along the support element 38. The electric lines 43 are realized as connection lines 43 that are designed to transmit signals or data from and/or to the user interface unit 29. Alternatively or additionally, the electric lines 43 may be realized as optical lines 43. However, other lines 43 considered appropriate by persons skilled in the art are also a possibility for data, signal and/or electric current transmission.

(26) The user interface unit 29 is surrounded by the machine housing 13 in a 360° plane E. The plane E extends substantially parallel to the longitudinal extent of the held power tool 11. The user interface unit 29 is delimited by a machine-housing part 13 realized as a handle housing 13a (FIG. 2) or, respectively, by a machine-housing part 13 realized as a transmission housing 13b, and by a machine-housing part 13 realized as a handle housing 13a (FIGS. 3d, 5c).

(27) The user interface unit 29 is overlapped by the machine housing 13 on a side that faces away from the inner element 31. The user interface unit 29 has a peripheral region, or edge region, that delimits the user interface unit 29 and that is overlapped, at least substantially, by the machine housing 13. An overlap 49 can thereby be realized. The peripheral region of the user interface unit 29 may be arranged on both sides, in a direction orthogonal to the longitudinal axis L of the held power tool 11. The user interface unit 29 may be overlapped by the machine housing 13 on a side that faces away from the inner element 31 and on a side that faces toward the inner element 31, and form corresponding overlaps. The overlaps may form a guide recess that is designed to receive the user interface unit 29.

(28) The user interface unit 29 has two user interface units 29a, 29b, the first user interface unit 29a being realized as an operating element and as an indicating element. The first user interface unit 29a is designed to actuate and indicate a function of the held power tool.

(29) The user interface unit 29 has two user interface elements 29a, 29b, a first user interface element 29a being realized as a HMI for actuating or indicating a function, or an item of information, of the held power tool 11, and a second user interface element 29b being realized as an actuating element for actuating the drive unit 15, in particular an On/Off switch (FIG. 3c). The second operating element 29b may be realized as a mechanical slide switch (FIG. 3c). The second operating element 29b may be realized as an electronic operating button (FIGS. 1, 2, 4, 5a). A function of the held power tool 11 may be understood to mean, for example, an operation of switching the drive unit off or on, limiting a drive power of the drive motor, limiting a rotational speed of the drive motor, limiting a duration of use of the held power tool 11, switching a state of the held power tool 11, etc. For example, the function may also be understood to include output of the temperature, of an overload circuit or of a battery status. Other functions, considered appropriate by persons skilled in the art, may also be possibilities. The user interface elements 29a, 29b are connected by means of electric lines. The electric lines are arranged, by means of clamping means, on the inner element 31 realized as a machine housing of the drive unit 15 (FIG. 3d).

(30) The first and the second user interface element 29a, 29b are connected to the electronics unit 50 and/or to a battery interface 51 by means of lines 43. The battery interface 51 is designed to receive the battery 53 and to supply the held power tool 11 with electrical energy. The first user interface element 29a and the second user interface element 29b may be connected to each other by means of an electric line 43 and, in particular, transmit data or switching states.

(31) The machine housing 13 has a delimitation recess 54 for receiving the user interface unit 29. The delimitation recess 54 is realized as a through-opening that, at least in portions, goes fully through a material thickness of the machine housing 13. The delimitation recess 54 is delimited by a transmission housing 13b (FIGS. 3d, 5c). The delimitation recess 54 is delimited by the handle housing 13a (FIGS. 1, 2, 4).

(32) The machine housing 13 is formed from a shell construction, and has a machine-housing shell (FIGS. 1, 2, 4). The machine housing 13 has a first half-shell and a second half-shell 55a, 55b, which form at least the machine-housing part 13 realized as a handle housing 13a. The half-shells 55a, 55b are delimited by the delimitation recess 53. Both half-shells 55a, 55b have a delimitation recess 53. The half-shells 55a, 55b are formed from a plastic. For example, FIG. 4 shows a substantially empty half-shell 55a, into which an inner element 31, together with the user interface unit 29, can be inserted particularly easily in one piece, whereas, in the case of an inner element 31 already inserted in the half-shell 55a, assembly is rendered significantly more difficult by a user interface unit 29 that is to be inserted subsequently.

(33) Alternatively, the machine housing 13 is formed from a barrel construction, and has a machine-housing barrel (FIG. 5b). The machine-housing barrel forms a handle housing. The machine housing 13 is formed from a hollow cylindrical machine housing 13 (FIGS. 3d, 5b) realized as a handle housing (FIGS. 5b, 5c). In each case, the machine-housing part 13, realized as a handle housing 13a, and as a transmission housing 13b, is delimited along the longitudinal axis L of the held power tool 11 by the delimitation recess 54.

(34) The delimitation recess 54 is delimited, in the radial direction of the longitudinal axis Le of the held power tool 11, by the outer surface 33 of the inner element 31.

(35) The delimitation recess 54 has an extent, along the plane E, that is less than an extent of the user interface unit 29 along the plane E.

(36) The held power tool 11 has a sealing element 57, which is arranged between the user interface unit 29 and the machine housing 13. The sealing element 57 is realized as a labyrinth seal. The sealing element 57 may be formed from a plastic or a foam material. The sealing element 57 is designed to seal off a gap (not shown) between the machine housing 13 and the user interface unit 29, for example against dirt and water.

(37) The user interface element 29 has a plurality of indicating element that are designed to indicate information, wherein, in one embodiment, three indicating element are designed to indicate a set rotational speed (FIG. 5a), and in further embodiments a further indicating element is designed to indicate a battery status of the battery unit (FIGS. 1, 2, 3a).

(38) It is understood that the user interface unit 29 may also have an operating element that is realized as a single piece with the indicating element. For example, the operating element may be realized as an operating button that, upon actuation, indicates information concerning the actuated operating button, for example by illumination of the actuated operating button. The user interface unit 29 has three operating buttons. The operating buttons may be provided to.