Clamping device for a hand-held power tool

Patent metadata

Field	Value
Publication number	US-9486909-B2
Application number	US-201114118404-A
Country	US
Kind code	B2
Filing date	Dec 23, 2011
Priority date	Jun 6, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A clamping device for a hand-held power tool includes at least one clamping unit configured to clamp a processing tool in an axial direction and at least one operating unit configured to actuate the at least one clamping unit. The at least one operating unit has at least one jaw coupling element configured to couple the at least one operating unit to the at least one clamping unit in a rotationally fixed manner. The at least one jaw coupling element is supported so as to be movable at least substantially parallel to the axial direction.

First claim

The invention claimed is:

1. A hand-held power-tool clamping device, comprising:
at least one clamping unit configured to securely clamp a working tool in an axial direction; and
at least one operating unit configured to actuate the at least one clamping unit,
wherein the at least one operating unit has at least one claw coupling element mounted so as to be movable at least substantially parallelwise in relation to the axial direction, the at least one claw coupling element configured at least to couple the at least one operating unit to the at least one clamping unit in a rotationally fixed manner, and
wherein the at least one operating unit has at least one operating lever mounted so as to be rotatable about at least one rotation axis that is at least substantially parallel to the axial direction.

2. The hand-held power-tool clamping device as claimed in claim 1 , wherein:
the at least one operating unit has at least one cam mechanism configured to move the at least one claw coupling element, and
the at least one cam mechanism has at least one cam element disposed on an operating element of the at least one operating unit.

3. The hand-held power-tool clamping device as claimed in claim 2 , wherein the at least one cam mechanism has at least one movably mounted, pin-type actuating element configured to actuate the at least one claw coupling element.

4. The hand-held power-tool clamping device as claimed in claim 2 , wherein the at least one cam mechanism has at least one spring element configured to exert a spring force upon the at least one claw coupling element.

5. The hand-held power-tool clamping device as claimed in claim 1 ,
wherein the at least one operating unit has at least one tilt-lever unit configured to move the at least one claw coupling element.

6. The hand-held power-tool clamping device as claimed in claim 5 , wherein:
the at least one operating unit includes at least one operating lever configured to constitute a tilt-lever element of the at least one tilt-lever unit, and
the at least one operating lever is swivelable about a swivel axis that does not intersect the at least one rotation axis.

7. The hand-held power-tool clamping device as claimed in claim 6 , wherein the at least one tilt-lever unit has at least one operating-lever biasing element configured to exert a biasing force upon the at least one operating lever in at least one operating position of the at least one operating lever.

8. The hand-held power-tool clamping device as claimed in claim 5 , wherein:
the at least one claw coupling element is mounted so as to be rotatable relative to an operating lever of the at least one operating unit, and
the at least one claw coupling element is configured to be rotatable about a claw rotation axis that is at least substantially parallel to the axial direction.

9. The hand-held power tool clamping device as claimed in claim 5 , wherein the at least one tilt-lever unit has at least one movably mounted, pin-type actuating element configured to actuate the at least one claw coupling element.

10. The hand-held power tool clamping device as claimed in claim 5 , wherein the at least one tilt-lever unit has at least one spring element configured to exert a spring force upon the at least one claw coupling element.

11. The hand-held power-tool clamping device as claimed in claim 1 , wherein the at least one clamping unit has at least one clamping element, including a clamping head disposed eccentrically in relation to a longitudinal axis of the at least one clamping element.

12. The hand-held power-tool clamping device as claimed in claim 11 ,
wherein the at least one clamping unit has at least one anti-rotation element configured to secure the at least one clamping element against rotation, at least during at least one of a clamping operation and a release operation.

13. The hand-held power-tool clamping device as claimed in claim 1 , wherein the at least one clamping unit has at least one overload limiting element configured to interrupt a transmission of torque from the at least one operating unit to the at least one clamping unit if a maximum torque is exceeded.

14. The hand-held power-tool clamping device as claimed in claim 1 , wherein the at least one operating lever is mounted so as to be swiveled about at least one swivel axis that is at least substantially perpendicular to the axial direction.

15. The hand-held power-tool clamping device as claimed in claim 1 , wherein the clamping device is a clamping device for an oscillating hand-held power tool.

16. A hand-held power tool, comprising:
a hand-held power-tool clamping device, including:
at least one clamping unit configured to securely clamp a working tool in an axial direction; and
at least one operating unit configured to actuate the at least one clamping unit,
wherein the at least one operating unit has at least one claw coupling element mounted so as to be movable at least substantially parallelwise in relation to the axial direction, the at least one claw coupling element configured at least to couple the at least one operating unit to the at least one clamping unit in a rotationally fixed manner, and
wherein the at least one operating unit has at least one operating lever mounted so as to be rotatable about at least one rotation axis that is at least substantially parallel to the axial direction.

17. The hand-held power tool as claimed in claim 16 , wherein the hand-held power tool is a hand-held power tool having a spindle that can be driven in an oscillating manner.

Assignees

• Zieger Jens
• Lutz Tobias
• Gyori Szabolcs
• Bosch Gmbh Robert

Inventors

• Zieger Jens
• Lutz Tobias
• Gyori Szabolcs

Classifications

• B24B23/022 Primary

  Spindle-locking devices, e.g. for mounting or removing the tool · CPC title

• B25F5/00 Primary

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• B27B5/32

  Devices for securing circular saw blades to the saw spindle · CPC title

• Y10T279/33

  Member applies axial force component · CPC title