Handheld tool device

Patent metadata

Field	Value
Publication number	US-10315299-B2
Application number	US-201214368469-A
Country	US
Kind code	B2
Filing date	Dec 19, 2012
Priority date	Dec 27, 2011
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A handheld tool device includes a hammer mechanism that has at least a striker and a cam guide that drives the striker at least in a hammer-drilling mode. The striker has at least a portion of the cam guide.

First claim

What is claimed is:

1. A handheld tool device, comprising:
a hammer mechanism which includes a striker and at least one cam guide which drives the striker at least in a hammer-drilling mode, wherein the striker includes at least a portion of the cam guide and is supported to move axially to provide impacts in an axial impact direction, wherein the striker is fixed against rotation relative to a handheld tool housing during an impact operation such that the striker is rotationally immobile relative to the handheld tool housing during the impact operation,
wherein the hammer mechanism includes a hammer mechanism spindle which includes at least a portion of the cam guide,
wherein the striker at least substantially surrounds the hammer mechanism spindle on at least one plane by 360 degrees; and
a tool spindle, wherein the striker surrounds the tool spindle on at least one plane by 360 degrees,
wherein the tool spindle is disposed at least substantially coaxially with the hammer mechanism spindle,
wherein the cam guide has an impact free-running region through which a connecting element moves, at least in a hammer-drilling mode, without experiencing an axial force,
wherein the cam guide has an impact pull-up region which moves the striker, at least in a hammer-drilling mode, counter to the axial impact direction,
wherein the impact pull-up region is of a helical configuration and extend through 180 degrees about a rotation axis of the hammer mechanism spindle.

2. The handheld tool device as recited in claim 1 , wherein the cam guide has a mounting aperture.

3. The handheld tool device as recited in claim 1 , wherein the hammer mechanism spindle has a guide cam of the cam guide.

4. The handheld tool device as recited in claim 1 , wherein the hammer mechanism has a connecting element which in at least one operating state transmits a motion to the striker.

5. The handheld tool device as recited in claim 4 , wherein the connecting element is embodied as a ball.

6. The handheld tool device as recited in claim 1 , wherein the hammer mechanism has a striker guide which supports the striker in a manner fixed against relative rotation.

7. The handheld tool device as recited in claim 1 , wherein the hammer mechanism has a hammer mechanism spring which is supported on the striker and on the handheld tool housing.

8. The handheld tool device as recited in claim 1 , wherein the hammer mechanism includes a first cam guide and a second cam guide.

9. The handheld tool device as recited in claim 8 , wherein the first cam guide and the second cam guide are disposed offset by 180 degrees about the rotation axis.

10. The handheld tool device as recited in claim 8 , wherein the first cam guide and the second cam guide are disposed one behind the other in the axial impact direction.

11. The handheld tool device as recited in claim 1 , wherein the impact free-running region connects two ends of the helical impact pull-up region and extends through 180 degrees about the rotation axis of the hammer mechanism spindle.

12. A handheld tool, comprising:
a handheld tool device, comprising:
a hammer mechanism which includes a striker and at least one cam guide which drives the striker at least in a hammer-drilling mode, wherein the striker includes at least a portion of the cam guide and is supported to move axially to provide impacts in an axial impact direction, wherein the striker is fixed against rotation relative to a handheld tool housing during an impact operation such that the striker is rotationally immobile relative to the handheld tool housing during the impact operation,
wherein the hammer mechanism includes a hammer mechanism spindle which includes at least a portion of the cam guide,
wherein the striker at least substantially surrounds the hammer mechanism spindle on at least one plane by 360 degrees; and
a tool spindle, wherein the striker surrounds the tool spindle on at least one plane by 360 degrees,
wherein the tool spindle is disposed at least substantially coaxially with the hammer mechanism spindle,
wherein the cam guide has an impact free-running region through which a connecting element moves, at least in a hammer-drilling mode, without experiencing an axial force,
wherein the cam guide has an impact pull-up region which moves the striker, at least in a hammer-drilling mode, counter to the axial impact direction,
wherein the impact pull-up region is of a helical configuration and extend through 180 degrees about a rotation axis of the hammer mechanism spindle.

Assignees

• Bosch Gmbh Robert

Inventors

• Herr Tobias

Classifications

• B25D2217/0015

  Anvils · CPC title

• B25D2250/231

  Sleeve details · 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

• B25D2250/371

  Use of springs · CPC title

• B25D2211/006

  Parallel drill and motor spindles · CPC title