Hand-held power tool with a switching unit

Patent metadata

Field	Value
Publication number	US-10478961-B2
Application number	US-201715598983-A
Country	US
Kind code	B2
Filing date	May 18, 2017
Priority date	Jun 2, 2016
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A hand-held power tool, in particular an angle-grinding machine, includes a housing, a switching unit, a motor, and at least one first pivot unit and one second pivot unit. The switching unit includes a ratchet element arranged on the housing. The first and second pivot units are configured to mount the ratchet element on the housing so as to be movable. Each of the first and the second pivot units includes at least one housing-side bearing unit and one ratchet-side bearing unit. The hand-held power tool further includes a coupling unit configured to couple the first pivot unit with the one second pivot unit.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a housing;
a switching unit including a ratchet element arranged on the housing;
a motor;
at least one first pivot unit and one second pivot unit, the first and second pivot units configured to mount the ratchet element on the housing of the hand-held power tool so as to be movable; and
a coupling unit configured to couple the first pivot unit with the second pivot unit,
wherein each of the first and the second pivot units includes at least one housing-side bearing unit and one ratchet-side bearing unit.

2. The hand-held power tool according to claim 1 , wherein:
each of the first and the second pivot units includes a first arm configured to connect the housing-side bearing unit to the ratchet-side bearing unit, and
the first arm of the first pivot unit and the first arm of the second pivot unit are configured such that first arm of the first pivot unit is always moved parallel to the first arm of the second pivot unit.

3. The hand-held power tool according to claim 1 , wherein:
each of the first and the second pivot units includes one second arm configured to connect the housing-side bearing unit to a further bearing unit, and
the further bearing unit is configured to mount the coupling unit on the first and the second pivot units.

4. The hand-held power tool according to claim 1 , wherein:
an axial extent of the coupling unit corresponds to a distance between the housing-side bearing unit of the first pivot unit and the housing-side bearing unit of the second pivot unit.

5. The hand-held power tool according to claim 1 , wherein:
the coupling unit is one of: a rod element, a plastics material part, and a sheet metal bending part.

6. The hand-held power tool according to claim 1 , wherein:
the first and the second pivot units are rotatably mounted such that rotational movement of the first pivot unit follows rotational movement of the second pivot unit.

7. The hand-held power tool according to claim 1 , wherein:
at least one of the housing-side bearing units and/or at least one of the ratchet-side bearing unit of the first pivot unit and/or the second pivot unit includes a linear guide.

8. The hand-held power tool according to claim 1 , wherein:
the first pivot unit is spaced from the second pivot unit by at least a length of 25% of an axial extent of the ratchet element.

9. The hand-held power tool according to claim 1 , wherein:
in at least one state of the hand-held power tool, a switching element of the switching unit is actuated in a translatory manner by the ratchet element.

10. The hand-held power tool according to claim 1 , wherein:
the coupling unit includes a toothed wheel element.

11. The hand-held power tool according to claim 10 , wherein:
an angle between the first arm of the first pivot unit and a radial axis of the hand-held power tool is configured to be set to a value of between 60° and 120°.

12. The hand-held power tool according to claim 11 , wherein:
the value is between 70° and 110°.

13. The hand-held power tool according to claim 1 , wherein:
the coupling unit is a scissors lifting unit.

14. The hand-held power tool according to claim 13 , wherein:
an angle between the first arm of the first pivot unit and an axial axis of the hand-held power tool is configured to be set to a value of between 0° and 30°.

15. The hand-held power tool according to claim 14 , wherein:
the value is between 0° and 20°.

16. The hand-held power tool according to claim 1 , further comprising:
a resetting element configured to provide a resetting force in opposition to an actuating direction of the ratchet element,
wherein the resetting element is arranged on at least one of the first pivot unit and the second pivot unit.

17. The hand-held power tool according to claim 16 , wherein:
the first and the second pivot units form one structural unit with the coupling unit and with the resetting element.

18. The hand-held power tool according to claim 16 , wherein:
the resetting element is a leg spring.

19. The hand-held power tool according to claim 1 , wherein:
the first and the second pivot units are rotatably mounted such that rotational movement of the first pivot is effected in an opposite direction as rotational movement of the second pivot unit.

20. The hand-held power tool according to claim 1 , wherein:
in at least one state of the hand-held power tool, a switching element of the switching unit is actuated in a rotational manner by at least one of the first pivot unit and the second pivot unit.

Assignees

• Bosch Gmbh Robert

Inventors

• Barth Daniel
• Boeck Cornelius
• Andrasic Sinisa

Classifications

• B24B23/02

  with rotating grinding tools; Accessories therefor · CPC title

• B25F5/02 Primary

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

• B24B23/024

  driven by hands or feet · CPC title

• H01H3/20

  wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling · CPC title

• H01H3/14

  adapted for operation by a part of the human body other than the hand, e.g. by foot · CPC title