Hand-held power tool which includes a shiftable transmission

Patent metadata

Field	Value
Publication number	US-10183392-B2
Application number	US-201414895419-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Jun 3, 2013
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A hand-held power tool includes: a shiftable transmission for driving a drive shaft, which transmission is situated in a gear housing and is shiftable at least between a first gear and a second gear via a shifting member; and a pivotably supported actuating element, which is configured as a bistable spring element and situated, at least in sections, in the area between the shifting member and the gear housing, is associated with the shifting member. The bistable spring element is actuatable for the gear shifting, and assumes a stable shift position in at least one shift position of the shifting member associated with the first or second gear, and assumes an unstable position in an intermediate position of the shifting member which is situated between shift positions of the shifting member associated with the first and second gears.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a shiftable transmission for driving a drive shaft, wherein the shiftable transmission is situated in a gear housing and is shiftable at least between a first gear and a second gear via a shifting member; and
a pivotably supported actuating element associated with the shifting member, wherein the pivotably supported actuating element is configured as a bistable spring element and is situated, at least in sections, in an area between the shifting member and the gear housing, the bistable spring element being actuatable for the gear shifting, and wherein the bistable spring element assumes a stable shift position in at least one shift position of the shifting member associated with one of the first gear or the second gear, and assumes an unstable position in an intermediate position of the shifting member which is situated between shift positions of the shifting member associated with the first and second gears,
wherein the bistable spring element is pivotably supported on a bearing element comprising a ring shaped support.

2. The hand-held power tool as recited in claim 1 , wherein the bistable spring element includes a ring-shaped base body which is situated in the area between the shifting member and the gear housing.

3. The hand-held power tool as recited in claim 1 , wherein the bistable spring element includes at least two radially inwardly directed cam latches which are (i) coupled to the shifting member, and (ii) configured for moving the shifting member into a selected shift position which is associated with one of the first gear or the second gear when the bistable spring element is actuated for the gear shifting.

4. The hand-held power tool as recited in claim 1 , wherein the bistable spring element includes at least two radially outwardly directed control latches which are configured for allowing an actuation of the bistable spring element for the gear shifting via one of a first shifting element or a second shifting element.

5. The hand-held power tool as recited in claim 4 , wherein the bistable spring element includes at least four radially outwardly directed control latches which are configured for allowing an actuation of the bistable spring element for the gear shifting via one of a first shifting element or a second shifting element.

6. The hand-held power tool as recited in claim 4 , wherein the first shifting element is configured for providing an acceleration function, and the second shifting element is configured for providing a gear shifting function.

7. The hand-held power tool as recited in claim 3 , wherein the bistable spring element includes at least one radially outwardly directed control latch which is configured for allowing an actuation of the bistable spring element for the gear shifting via at least one shifting element configured as a gear shift selector element.

8. The hand-held power tool as recited in claim 7 , wherein the bistable spring element includes at least two radially outwardly directed control latches which are configured for allowing an actuation of the bistable spring element for the gear shifting via the at least one shifting element configured as the gear shift selector element.

9. The hand-held power tool as recited in claim 3 , wherein the bistable spring element includes at least one radially outwardly directed control latch which is configured for allowing an actuation of the bistable spring element for the gear shifting via at least one shifting element configured as a hand switch.

10. The hand-held power tool as recited in claim 9 , wherein the bistable spring element includes at least two radially outwardly directed control latches which are configured for allowing an actuation of the bistable spring element for the gear shifting via the at least one shifting element configured as the hand switch.

11. The hand-held power tool as recited in claim 3 , wherein the bistable spring element is pivotably supported in the gear housing on at least two body edges.

12. The hand-held power tool as recited in claim 11 , wherein the at least two body edges are configured as radial extensions on the ring-shaped base body of the bistable spring element.

13. The hand-held power tool as recited in claim 3 , wherein a bearing element configured as a bearing plate for pivotably supporting the bistable spring element is situated in the gear housing.

14. The hand-held power tool as recited in claim 13 , wherein at least two axial bearing arms for pivotably supporting the bistable spring element are formed on the bearing element.

15. The hand-held power tool as recited in claim 3 , wherein the shiftable transmission is configured as a planetary gear which includes at least three planetary stages, and wherein the shifting member is configured as a shifting annulus gear.

16. A hand-held power tool, comprising:
a shiftable transmission for driving a drive shaft, wherein the shiftable transmission is situated in a gear housing and is shiftable at least between a first gear and a second gear via a shifting member; and
a pivotably supported actuating element associated with the shifting member, wherein the pivotably supported actuating element is configured as a bistable spring element and is situated, at least in sections, in an area between the shifting member and the gear housing, the bistable spring element being actuatable for the gear shifting, and wherein the bistable spring element assumes a stable shift position in at least one shift position of the shifting member associated with one of the first gear or the second gear, and assumes an unstable position in an intermediate position of the shifting member which is situated between shift positions of the shifting member associated with the first and second gears,
wherein the bistable spring element includes at least two radially inwardly directed cam latches which are (i) coupled to the shifting member, and (ii) configured for moving the shifting member into a selected shift position which is associated with one of the first gear or the second gear when the bistable spring element is actuated for the gear shifting,
wherein the bistable spring element includes at least one radially outwardly directed control latch which is configured for allowing an actuation of the bistable spring element for the gear shifting via at least one shifting element configured as a gear shift selector element,
wherein the bistable spring element includes at least two radially outwardly directed control latches which are configured for allowing an actuation of the bistable spring element for the gear shifting via the at least one shifting element configured as the gear shift selector element.

17. A hand-held power tool, comprising:
a shiftable transmission for driving a drive shaft, wherein the shiftable transmission is situated in a gear housing and is shiftable at least between a first gear and a second gear via a shifting member; and
a pivotably supported actuating element associated with the shifting member, wherein the pivotably supported actuating element is configured as a bistable spring element and is situated, at least in sections, in an area between the shifting member and the gear housing, the bistable spring element being actuatable for the gear shifting, and wherein the bistable spring element assumes a stable shift position in at least one shift position of the shifting member associated with one of the first gear or the second gear, and assumes an unstable position in an intermediate position of the shifting member which is situated between shift posi

Assignees

• Bosch Gmbh Robert

Inventors

• Brennenstuhl Jens
• Roehm Heiko
• Heber Andreas

Classifications

• B25B21/008

  with automatic change-over from high speed-low torque mode to low speed-high torque mode · CPC title

• B25F5/001 Primary

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• B25B21/00

  Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) · CPC title

• F16H63/04

  a single final output mechanism being moved by a single final actuating mechanism · CPC title

• F16H2200/2005

  with one sets of orbital gears · CPC title