Gear shift device for a shiftable gear unit of a power tool

Patent metadata

Field	Value
Publication number	US-9739366-B2
Application number	US-201313850526-A
Country	US
Kind code	B2
Filing date	Mar 26, 2013
Priority date	Mar 26, 2012
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A gear shift device for a shiftable gear unit of a power tool includes a housing, an operating element, and a transmission member that acts upon a displaceable gear unit component. A bearing sliding guide is disposed in the interior of the housing and configured to slidingly guide the transmission member.

First claim

What is claimed is:

1. A gear shift device for a shiftable gear unit of a power tool, the gear unit having at least two gear stages, the gear shift device comprising:
a non-pivoting transmission member configured to act upon a gear unit component, the gear unit component displaceable relative to a housing; and
an operating element positioned outwardly of the housing and linearly displaceable relative to the housing, the operating element coupled to the transmission member to actuate the transmission member to act upon the gear unit component,
wherein the transmission member is axially displaceable by the operating element between at least two actuating positions that correspond to the at least two gear stages of the gear unit, and
wherein a bearing sliding guide is disposed in an interior of the housing, the bearing sliding guide receiving and slidingly guiding the transmission member, the bearing sliding guide disposed on a ring gear of the gear unit, the ring gear being axially and rotationally fixed relative to the housing.

2. The gear shift device according to claim 1 , wherein the bearing sliding guide is disposed on an inner side of the housing.

3. The gear shift device according to claim 1 , wherein the bearing sliding guide is a longitudinal groove.

4. The gear shift device according to claim 1 , wherein the transmission member is a wire bow.

5. The gear shift device according to claim 4 , wherein the wire bow has two bow halves, each bow half having a rectilinear axial portion that extends in an axial direction and is slidingly guided in the bearing sliding guide.

6. The gear shift device according to claim 5 , wherein the two bow halves are connected to each other via a connecting portion, the connecting portion being coupled to the operating element.

7. The gear shift device according to claim 1 , wherein the transmission member has at least one axial portion that extends in an axial direction and that is accommodated in the bearing sliding guide.

8. The gear shift device according to claim 1 , wherein the transmission member is routed axially through an end face wall of the housing.

9. The gear shift device according to claim 8 , wherein, outside of the end face wall, the transmission member has a connecting portion that is bent radially outward and that is connected to the operating element.

10. The gear shift device according to claim 1 , wherein the gear unit is a planetary gear unit.

11. The gear shift device according to claim 1 , wherein:
the housing has a peripheral wall that defines the interior of the housing, and
the bearing sliding guide does not extend from the interior of the housing to an exterior of the housing.

12. The gear shift device according to claim 1 , wherein the ring gear is a shift ring gear.

13. The gear shift device according to claim 1 , wherein the housing is a gear unit housing.

14. The gear shift device according to claim 1 , wherein the bearing sliding guide is a longitudinal groove formed in a circumferential surface of the ring gear.

15. A hand power tool, comprising:
a shiftable gear unit having at least two gear stages; and
a gear shift device configured to shift the gear unit, the gear shift device including:
a non-pivoting transmission member configured to act upon a gear unit component, the gear unit component displaceable relative to a housing; and
an operating element positioned outwardly of the housing and linearly displaceable relative to the housing, the operating element coupled to the transmission member to actuate the transmission member to act upon the gear unit component,
wherein the transmission member is axially displaceable by the operating element between at least two actuating positions that correspond to the at least two gear stages of the gear unit, and
wherein a bearing sliding guide is disposed in an interior of the housing, the bearing sliding guide receiving and slidingly guiding the transmission member, the bearing sliding guide disposed on a ring gear of the gear unit, the ring gear being disposed within the interior of the housing.

16. The hand power tool according to claim 15 , wherein the bearing sliding guide is a groove.

17. The hand power tool according to claim 16 , wherein the groove is formed in a circumferential surface of the ring gear.

18. The hand power tool according to claim 15 , wherein the ring gear is axially and rotationally fixed relative to the housing.

19. The hand power tool according to claim 15 , wherein the bearing sliding guide is arranged on an interior wall of the housing.

20. The hand power tool according to claim 15 , wherein the housing is a gear unit housing configured to retain the gear unit.

21. The hand power tool according to claim 15 , wherein:
the housing has a peripheral wall that defines the interior of the housing, and
the bearing sliding guide does not extend from the interior of the housing to an exterior of the housing.

22. The hand power tool according to claim 15 , wherein the ring gear is a shift ring gear.

23. The hand power tool according to claim 15 , wherein the housing is a gear unit housing.

24. A gear shift device for a shiftable gear unit of a power tool, the gear unit having at least two gear stages, the gear shift device comprising:
a non-pivoting transmission member configured to act upon a gear unit component, the gear unit component displaceable relative to a housing; and
an operating element positioned outwardly of the housing and linearly displaceable relative to the housing, the operating element coupled to the transmission member to actuate the transmission member to act upon the gear unit component,
wherein the transmission member is axially displaceable by the operating element between at least two actuating positions that correspond to the at least two gear stages of the gear unit,
wherein a bearing sliding guide is disposed in an interior of the housing, the bearing sliding guide receiving and slidingly guiding the transmission member, and
wherein the transmission member has at least one axial portion that extends in an axial direction and that is accommodated in the bearing sliding guide.

25. A hand power tool, comprising:
a shiftable gear unit having at least two gear stages; and
a gear shift device configured to shift the gear unit, the gear shift device including:
a non-pivoting transmission member configured to act upon a gear unit component, the gear unit component displaceable relative to a housing; and
an operating element positioned outwardly of the housing and linearly displaceable relative to the housing, the operating element coupled to the transmission member to actuate the transmission member to act upon the gear unit component,
wherein the transmission member is axially displaceable by the operating element between at least two actuating positions that correspond to the at least two gear stages of the gear unit,
wherein a bearing sliding guide is disposed in an interior of the housing, the bearing sliding guide receiving and slidingly guiding the transmission member, and
wherein the transmission member has at least one axial portion that extends in an axial direction and that is accommodated in the bearing sliding guide.

Assignees

• Bosch Gmbh Robert

Inventors

• Duerr Thomas

Classifications

• F16H59/041

  consisting of a final output mechanism, e.g. ratio selector being directly linked to a shift fork · CPC title

• Y10T74/20177

  Particular element [e.g., shift fork, template, etc.] · CPC title

• F16H3/62

  Gearings having three or more central gears (F16H3/68 - F16H3/78 take precedence) · 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

• B25F5/001 Primary

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