Hand-held power tool

Patent metadata

Field	Value
Publication number	US-10183391-B2
Application number	US-201614993251-A
Country	US
Kind code	B2
Filing date	Jan 12, 2016
Priority date	Jul 3, 2009
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A hand-held power tool, in particular an impact drill driver, has a gearbox assemblage, a hammer impact mechanism, and a tool spindle. The hammer impact mechanism includes a striker that at least partly surrounds the tool spindle in at least one plane.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a gearbox assemblage;
a hammer impact mechanism; and
a tool spindle including a tool mounting device;
wherein the hammer impact mechanism includes a linearly moveable striker that at least partly surrounds the tool spindle in at least one plane,
wherein in at least one operating state, the striker impacts the tool spindle linearly,
wherein in at least one operating state, the striker impacts a transfer element of the tool spindle linearly, wherein the transfer element is arranged as a thickening of the tool spindle,
wherein the hammer impact mechanism has a drive rotation element having a rotation axis that is disposed coaxially with at least a part of the tool spindle,
wherein the drive rotation element is arranged as an impact mechanism shaft that encases at least a region of the tool spindle and transfers a rotary motion to the striker to generate an impact.

2. The hand-held power tool of claim 1 , wherein the hammer impact mechanism includes a resilient lever element, supported pivotably around a pivot axis, which is to drive the striker of the hammer impact mechanism in at least one operating state.

3. The hand-held power tool of claim 1 , wherein in at least one operating state, the striker is freely movable in a principal working direction.

4. The hand-held power tool of claim 1 , wherein the tool spindle includes a rotary entrainment contour which is for creating an axially displaceable and nonrotatable connection along a rotation axis.

5. The hand-held power tool of claim 4 , wherein the rotary entrainment contour is configured to create an axially displaceable and non-rotatable connection with at least one gear stage element of the gearbox assemblage along a rotation axis for pickoff of a rotation speed of the tool spindle in at least one operating state.

6. The hand-held power tool of claim 5 , wherein the rotary entrainment contour is embodied as an external tooth set of the tool spindle and an internal tooth set of the at least one gear stage element.

7. The hand-held power tool of claim 5 , wherein the at least one gear stage element is embodied as a planet carrier.

8. The hand-held power tool of claim 1 , wherein the gearbox assemblage includes at least one sun gear that, in at least one operating state, is connected nonrotatably to at least a part of the hammer impact mechanism.

9. The hand-held power tool of claim 8 , wherein the at least one sun gear is connected nonrotatably to a drive rotation element of the hammer impact mechanism.

10. The hand-held power tool of claim 1 , further comprising:
an electric motor and a battery connector unit for supplying the electric motor with energy.

11. The hand-held power tool of claim 1 , wherein the hammer impact mechanism includes a releasable clutch apparatus to transfer a rotary motion.

12. The hand-held power tool of claim 11 , wherein the clutch apparatus is to be closed by a force transferred via the tool spindle.

13. The hand-held power tool of claim 11 , wherein an operating element by way of which the clutch apparatus can be actuated.

14. The hand-held power tool of claim 11 , wherein the clutch apparatus is configured to releasably nonrotatably connect in at least one operating state a drive rotation element of the hammer impact mechanism and at least one gear stage element of the gearbox assemblage.

15. The hand-held power tool of claim 11 , wherein the clutch apparatus includes a spring element configured to close the clutch apparatus when the tool spindle is loaded with a force in an axial direction.

16. The hand-held power tool of claim 1 , wherein a torque setting unit has a clutch apparatus that is for limiting, in at least one operating state, a maximum torque transferred via the tool spindle.

17. The hand-held power tool of claim 1 , wherein the gearbox assemblage has at least one gear stage element to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode.

18. The hand-held power tool of claim 17 , wherein the at least one gear stage element is embodied as a planet carrier.

19. The hand-held power tool of claim 1 , wherein the gearbox assemblage includes at least one ring gear that is supported axially movably.

20. The hand-held power tool of claim 1 , wherein the gearbox assemblage includes at least one gear stage to increase a rotation speed for an impact drive.

21. The hand-held power tool of claim 1 , wherein the hand-held power tool is an impact drill driver.

22. The hand-held power tool of claim 1 , wherein the tool spindle and the impact mechanism shaft rotate, in at least one operating state, at a different angular speed.

23. The hand-held power tool of claim 1 , wherein the striker has an impact surface that is oriented substantially perpendicular relative to the tool spindle and the transfer element has an impact surface that is oriented substantially perpendicular relative to the tool spindle.

24. The hand-held power tool of claim 1 , wherein the gearbox assemblage is embodied as a planetary gearbox assemblage.

25. The hand-held power tool of claim 24 , wherein the planetary gearbox assemblage includes at least one gear stage adapted to reduce rotation speed of the tool spindle and at least one gear stage adapted to increase a rotation speed of a drive rotation element of the hammer impact mechanism for an impact drive.

26. The hand-held power tool of claim 25 , wherein the at least one gear stage adapted to increase the rotation speed of the drive rotation element includes at least one sun gear that, in at least one operating state, is connectable nonrotatably to the drive rotation element.

27. The hand-held power tool of claim 24 , wherein the planetary gearbox assemblage includes at least one planetary gear stage element which is adapted to increase the rotation speed of a drive rotation element of the hammer impact mechanism for an impact drive.

28. The hand-held power tool of claim 27 , wherein the at least one planetary gear stage element is embodied as a planet carrier.

29. The hand-held power tool of claim 28 , wherein the at least one planetary gear stage element is embodied as a common planet carrier of two planet gear stages.

30. A hand-held power tool, comprising:
a gearbox assemblage;
a hammer impact mechanism; and
a tool spindle including a tool mounting device;
wherein the hammer impact mechanism includes a linearly moveable striker that at least partly surrounds the tool spindle in at least one plane,
wherein in at least one operating state, the striker impacts the tool spindle linearly,
wherein the tool spindle includes a rotary entrainment contour which is for creating an axially displaceable and nonrotatable connection along a rotation axis,
wherein the rotary entrainment contour is configured to create an axially displaceable and non-rotatable connection with at least one gear stage element of the gearbox assemblage along a rotation axis for pickoff of a rotation speed of the tool spindle in at least one operating state.

Assignees

• Bosch Gmbh Robert

Inventors

• Hecht Joachim
• Roehm Heiko
• Herr Tobias

Classifications

• B25D11/00

  Portable percussive tools with electromotor {or other motor} drive · CPC title

• B25D2217/0015

  Anvils · CPC title

• B25D16/006

  Mode changers; Mechanisms connected thereto · CPC title

• B25D11/062

  comprising a wobbling mechanism, swash plate · CPC title

• B25D16/003 Primary

  Clutches specially adapted therefor · CPC title