Hand-held power tool

Patent metadata

Field	Value
Publication number	US-10796859-B2
Application number	US-201816041413-A
Country	US
Kind code	B2
Filing date	Jul 20, 2018
Priority date	Sep 12, 2017
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A hand-held power tool, in particular an angle grinder, includes a tool receiver, a tool housing, and a drive motor arranged in the tool housing. The drive motor is configured to be switched on and off via an electric On/Off switch for driving the tool receiver. The hand-held power tool also includes an actuating device configured to actuate the On/Off switch. The actuating device has a pivotably mounted actuating element and a pivotably mounted pawl that is configured to be coupled to the actuating element. The pawl is further configured, in a free-running state, to move pivotably relative to the actuating element and, in an actuation state, to exert upon the actuating element an actuating force that actuates the actuating device.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a tool receiver;
a tool housing;
a drive motor arranged in the tool housing and configured to drive the tool receiver, the drive motor further configured to be switched on and off via an electric On/Off switch; and
an actuating device configured to actuate the On/Off switch, the actuating device having a pivotably mounted actuating element and a pivotably mounted pawl configured to be coupled to the actuating element,
wherein the pawl is further configured, in a free-running state, to move pivotably relative to the actuating element without exerting an actuating force upon the actuating element and, in an actuation state, to exert upon the actuating element the actuating force that actuates the actuating device.

2. The hand-held power tool according to claim 1 , wherein the actuating element is arranged substantially in the tool housing and is surrounded by the tool housing.

3. The hand-held power tool according to claim 2 , wherein the actuating element is arranged substantially in a handle housing of the tool housing and is surrounded by the handle housing.

4. The hand-held power tool according to claim 3 , wherein the handle housing has handle region that is configured to be encompassed by an operator of the hand-held power tool, the pawl having a non-operative state, in which the pawl is arranged such that the pawl actuating surface is supported on a support region of the handle housing that adjoins the handle region.

5. The hand-held power tool according to claim 3 , wherein in an actuation state, the pawl surrounds the handle housing in a plane extending in relation to a direction of longitudinal extent of the handle housing by up to 90° in the circumferential direction of the handle housing.

6. The hand-held power tool according to claim 1 , wherein the actuating element is configured as a bar and has a maximum longitudinal extent that is less than a maximum longitudinal extent of the pawl.

7. The hand-held power tool according to claim 1 , further comprising at least one pawl contact surface arranged on the pawl, an actuation contact surface arranged on the actuating element, wherein a pivot movement of the pawl causes the pawl contact surface to act on the actuation contact surface to pivotably move the actuating element.

8. The hand-held power tool according to claim 1 , wherein the actuating element has a pivot axis that is arranged coaxially with, or parallel to and spaced apart from, the pivot axis of the pawl.

9. The hand-held power tool according to claim 1 , wherein the pawl has a first pivot angle range about a first pivot axis that is greater than a second pivot angle range of the actuating element about a second pivot axis of the actuating element.

10. The hand-held power tool according to claim 1 , wherein the pawl has a first pivot angle range in a free-running state, and a second pivot angle range in an actuation state, the first pivot angle range being greater, by up to 700%, than the second pivot angle range.

11. The hand-held power tool according to claim 10 , wherein the first pivot angle range is greater, by up to 100%, than the second pivot angle range.

12. The hand-held power tool according to claim 1 , wherein the pawl has a pivot angle range that comprises at least 180°.

13. The hand-held power tool according to claim 12 , wherein the pivot angle range comprises at least 60°.

14. The hand-held power tool according to claim 1 , wherein a first pivot angle range of the pawl in the actuation state is greater than or equal to a second pivot angle range of the actuating element in the actuation state.

15. The hand-held power tool according to claim 1 , wherein the pawl has an at least portionally curved pawl actuating surface that is configured to actuate the actuating device by an actuating force acting upon the pawl actuating surface.

16. The hand-held power tool according to claim 15 , wherein the at least portionally curved pawl actuating surface is a convexly curved pawl actuating surface, and wherein the actuating force acts orthogonally upon the pawl actuating surface.

17. The hand-held power tool according to claim 1 , wherein the pawl has a maximum longitudinal extent, and a maximum transverse extent that extends transversely in relation to the longitudinal extent, the maximum longitudinal extent being greater than the maximum transverse extent by up to 100%.

18. The hand-held power tool according to claim 17 , wherein the maximum transverse extent extends orthogonally in relation to the longitudinal extent, and wherein the maximum longitudinal extent is greater than the maximum transverse extent by up to 30%.

19. The hand-held power tool according to claim 1 , further comprising a locking device configured to hold the actuating device and the actuating element in an actuation state.

20. A portable power tool, comprising:
a hand-held power tool, the hand-held power tool including:
a tool receiver;
a tool housing;
a drive motor arranged in the tool housing and configured to drive the tool receiver, the drive motor further configured to be switched on and off via an electric On/Off switch; and
an actuating device configured to actuate the On/Off switch, the actuating device having a pivotably mounted actuating element and a pivotably mounted pawl configured to be coupled to the actuating element,
wherein the pawl is further configured, in a free-running state, to move pivotably relative to the actuating element without exerting an actuating force upon the actuating element and, in an actuation state, to exert upon the actuating element the actuating force that actuates the actuating device.

Assignees

• Bosch Gmbh Robert

Inventors

• Lutz Manfred
• Stierle Peter

Classifications

• B24B23/028 Primary

  Angle tools · CPC title

• H01H2217/008

  Pretravel to avoid inadvertent switching · CPC title

• H01H9/06 Primary

  Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• H01H2231/048

  Tools; Drilling machines · CPC title