Chuck

Patent metadata

Field	Value
Publication number	US-9676038-B2
Application number	US-201213357708-A
Country	US
Kind code	B2
Filing date	Jan 25, 2012
Priority date	Mar 2, 2011
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A chuck for a chiseling power tool has a holding sleeve that is arranged concentrically with respect to a working axis and that serves to receive one shank end of a tool having a locking groove. A locking element protrudes partially into the holding sleeve so as to engage with the locking groove. A sliding block guides the locking element, whereby the sliding block has a section that is wound helically around the working axis.

First claim

What is claimed is:

1. A chuck for a chiseling power tool comprising:
a holding sleeve arranged concentrically with respect to a working axis serving to receive one shank end of a tool having a locking groove;
a locking element protruding partially into the holding sleeve so as to engage with the locking groove, the locking element movable along the working axis; and
a sliding block, the sliding block having a groove wound helically around the working axis, the locking element being guided in the groove.

2. The chuck as recited in claim 1 further comprising a locking sleeve, an inside of the locking sleeve radially facing the working axis having the sliding block, the sliding block touching the locking element.

3. The chuck as recited in claim 2 wherein the locking sleeve is mounted so as to rotate around the working axis.

4. The chuck as recited in claim 2 wherein the inside of the locking sleeve has a cutout into which another locking element protrudes, a cutout dimension of the cutout being greater in a circumferential direction than a dimension of the sliding block in the circumferential direction.

5. The chuck as recited in claim 4 wherein the cutout has flanks parallel to the working axis, and the sliding block has flanks skewed with respect to the working axis or wound around the working axis.

6. The chuck as recited in claim 2 further comprising a detachable sliding block lock, the sliding block lock, in a locking position, tensioning the sliding block with a spring acting in the impact direction and, in an unlocked position, disengaging the spring from the sliding block.

7. The chuck as recited in claim 6 wherein the sliding block lock has the spring and a coupling element, the coupling element tensioned by a force of the spring against the locking sleeve in a direction of impact, and further comprising an actuation sleeve movable relative to the locking sleeve opposite to the direction of impact and joined to the coupling element or resting on the coupling element opposite to the direction of impact.

8. The chuck as recited in claim 2 wherein the holding sleeve has a slot, the locking element being inserted into the slot, the slot being wound helically around the working axis, at least in some sections.

9. The chuck as recited in claim 1 wherein the section is a helical section having a gradient angle between 5° and 25° relative to the working axis.

10. The chuck as recited in claim 1 wherein the locking element is in contact with the sliding block in a first circumferential direction as well as opposite to the first circumferential direction.

11. A chuck for a chiseling power tool comprising:
a holding sleeve arranged concentrically with respect to a working axis serving to receive one shank end of a tool having a locking groove;
a locking element protruding partially into the holding sleeve so as to engage with the locking groove, the locking element movable along the working axis;
a sliding block, the sliding block having a groove wound helically around the working axis or skewed with respect to the working axis, the locking element being guided in the groove; and
a locking sleeve, an inside of the locking sleeve radially facing the working axis having the sliding block, the sliding block touching the locking element, wherein the inside of the locking sleeve has a cutout into which another locking element protrudes, a cutout dimension of the cutout being greater in a circumferential direction than a dimension of the sliding block in the circumferential direction.

12. The chuck as recited in claim 11 wherein the cutout has flanks parallel to the working axis, and the sliding block has flanks skewed with respect to the working axis or wound around the working axis.

13. A chuck for a chiseling power tool comprising:
a holding sleeve arranged concentrically with respect to a working axis serving to receive one shank end of a tool having a locking groove;
a locking element protruding partially into the holding sleeve so as to engage with the locking groove, the locking element movable along the working axis;
a sliding block, the sliding block having a groove wound helically around the working axis or skewed with respect to the working axis, the locking element being guided in the groove;
a locking sleeve, an inside of the locking sleeve radially facing the working axis having the sliding block, the sliding block touching the locking element; and
a detachable sliding block lock, the sliding block lock, in a locking position, tensioning the sliding block with a spring acting in the impact direction and, in an unlocked position, disengaging the spring from the sliding block.

14. The chuck as recited in claim 13 wherein the sliding block lock has the spring and a coupling element, the coupling element tensioned by a force of the spring against the locking sleeve in a direction of impact, and further comprising an actuation sleeve movable relative to the locking sleeve opposite to the direction of impact and joined to the coupling element or resting on the coupling element opposite to the direction of impact.

Assignees

• Hauptmann Udo
• Hilti Ag

Inventors

• Hauptmann Udo

Classifications

• B25D11/005

  Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface · CPC title

• B25D17/088

  with radial movable locking elements co-operating with bit shafts specially adapted therefor · CPC title

• Y10T279/17094

  Sleeve type retainer · CPC title

• B25D2250/131

  Idling mode of tools · CPC title

• B23B31/1071 Primary

  Retention by balls (balls acting as jaws B23B31/22) · CPC title