Hammer mechanism

Patent metadata

Field	Value
Publication number	US-9649757-B2
Application number	US-201113989247-A
Country	US
Kind code	B2
Filing date	Oct 14, 2011
Priority date	Nov 29, 2010
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A hammer mechanism has a clamping chuck and a snap die provided for the direct striking of an inserted tool. The snap die includes a coupling element for transmitting a rotary motion to the clamping chuck.

First claim

What is claimed is:

1. A hammer mechanism of an apparatus, the hammer mechanism being configured for striking a tool inserted into the apparatus, comprising:
a clamping chuck;
a clamping chuck drive shaft; and
a snap die configured to directly strike the inserted tool,
wherein the clamping chuck drive shaft is joined to the snap die in a torsionally fixed and axially displaceable manner, wherein the clamping chuck drive shaft is configured to directly act on the snap die,
wherein the snap die includes a coupling element for transmitting a rotary motion of the clamping chuck drive shaft to the clamping chuck.

2. The hammer mechanism as recited in claim 1 , wherein the clamping chuck includes an inserted-tool coupling region with which the coupling element of the snap die engages at least partially.

3. The hammer mechanism as recited in claim 2 , further comprising:
a clamping chuck drive shaft for transmitting a rotary motion to the snap die.

4. The hammer mechanism as recited in claim 3 , wherein the clamping chuck drive shaft is at least partially disposed in a recess of the snap die in at least one operating state.

5. The hammer mechanism as recited in claim 2 , wherein the snap die includes a sealing region which rests against the clamping chuck without gear teeth.

6. The hammer mechanism as recited in claim 3 , further comprising:
a hammer element which is mounted by the clamping chuck drive shaft in a manner allowing movement in a strike direction in at least one operating state.

7. The hammer mechanism as recited in claim 6 , wherein the clamping chuck drive shaft at least partially penetrates the hammer element.

8. The hammer mechanism as recited in claim 6 , wherein the hammer element is configured to provide a strike pulse in the strike direction.

9. The hammer mechanism as recited in claim 6 , wherein the strike direction is an axial strike direction.

10. The hammer mechanism as recited in claim 3 , further comprising:
an impact-generation deactivation unit having a blocking element which acts on the snap die parallel to a force of the clamping chuck drive shaft, in at least a drilling operation.

11. The hammer mechanism as recited in claim 3 , further comprising:
a planetary gearing which drives the clamping chuck drive shaft in at least one operating state.

12. The hammer mechanism as recited in claim 3 , further comprising:
an impact-generation unit; and
a coupling element which is connected to the clamping chuck drive shaft in a torsionally-fixed manner and drives the impact-generation unit.

13. The hammer mechanism as recited in claim 1 , wherein the snap die is mounted to the clamping chuck in an axially movable manner.

14. A hand-held tool, comprising:
an inserted tool element; and
a hammer mechanism having a clamping chuck, a clamping chuck drive shaft, and a snap die configured to directly strike the inserted tool element, wherein the clamping chuck drive shaft is joined to the snap die in a torsionally fixed and axially displaceable manner, wherein the clamping chuck drive shaft is configured to directly act on the snap die, and wherein the snap die includes a coupling element for transmitting a rotary motion of the clamping chuck drive shaft to the clamping chuck.

15. A hammer mechanism of an apparatus, the hammer mechanism being configured for striking a tool inserted into the apparatus, comprising:
a clamping chuck;
a snap die configured to directly strike the inserted tool;
a clamping chuck drive shaft for transmitting a rotary motion to the snap die; and
a hammer element which is mounted by the clamping chuck drive shaft in a manner allowing movement in a strike direction in at least one operating state,
wherein the snap die includes a coupling element for transmitting a rotary motion to the clamping chuck,
wherein the clamping chuck drive shaft at least partially penetrates the hammer element.

16. A hammer mechanism of an apparatus, the hammer mechanism being configured for striking a tool inserted into the apparatus, comprising:
a clamping chuck;
a snap die configured to directly strike the inserted tool;
a clamping chuck drive shaft for transmitting a rotary motion to the snap die; and
an impact-generation deactivation unit having a blocking element which acts on the snap die parallel to a force of the clamping chuck drive shaft, in at least a drilling operation,
wherein the snap die includes a coupling element for transmitting a rotary motion to the clamping chuck.

Assignees

• Hecht Joachim
• Roehm Heiko
• Kraus Martin
• Bosch Gmbh Robert

Inventors

• Hecht Joachim
• Roehm Heiko
• Kraus Martin

Classifications

• B25D11/062

  comprising a wobbling mechanism, swash plate · CPC title

• B25D2250/301

  Torque transmission means · CPC title

• B25D16/00

  Portable percussive machines with superimposed rotation {, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit (combined percussion and rotary drilling adapted for earth drilling E21B6/00)} · CPC title

• B25D2216/0023

  Tools having a percussion-and-rotation mode · CPC title

• B25D2217/0019

  Guide-sleeves · CPC title