Hand-held power tool

Patent metadata

Field	Value
Publication number	US-9415497-B2
Application number	US-201013381846-A
Country	US
Kind code	B2
Filing date	Jun 1, 2010
Priority date	Jul 3, 2009
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

In a hand-held power tool, in particular an impact drill driver, having a gearbox assemblage, a hammer impact mechanism, and a tool spindle, the gearbox assemblage includes at least one gear stage element which is provided in order to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a planetary gearbox assemblage;
a hammer impact mechanism including a drive rotation element; and
a tool spindle;
wherein the planetary gearbox assemblage includes at least one planetary gear stage element adapted to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode,
wherein the at least one planetary gear stage element is an element of at least one gear stage of the planetary gearbox assemblage adapted to increase a rotation speed for an impact drive in which a rotation speed of the drive rotation element is higher than a rotation speed of the tool spindle,
wherein the planetary gearbox assemblage includes four gear stages, wherein the first, the second and the third gear stages are adapted to reduce rotation speed of the spindle, and the fourth gear stage is the gear stage adapted to increase the rotation speed for the impact drive,
wherein the fourth gear stage includes at least one sun gear that, in at least one operating state, is connectable nonrotatably to the drive rotation element of the hammer impact mechanism,
wherein the drive rotation element is arranged as an impact mechanism shaft that encases at least a region of the tool spindle.

2. The hand-held power tool according to claim 1 , wherein the hand-held power tool is arranged as an impact drill driver.

3. The hand-held power tool according to claim 1 , wherein the gearbox assemblage is adapted to generate, in at least one operating state, at least two output rotary motions that have a non-integer ratio to one another.

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

5. The hand-held power tool according to claim 4 , further comprising:
a spring element adapted to, in at least one operating state, exert a force on the axially movable ring gear.

6. The hand-held power tool according to claim 1 , wherein the tool spindle includes a rotary entrainment contour adapted to create an axially displaceable and nonrotatable connection along a rotation axis.

7. The hand-held power tool according to claim 1 , further comprising:
a torque setting unit including a clutch apparatus adapted to limit, in at least one operating state, a maximum torque transferrable via the tool spindle.

8. The hand-held power tool according to claim 7 , further comprising:
an operating element adapted to actuate the clutch apparatus.

9. The hand-held power tool according to claim 1 , wherein the drive rotation element has a rotation axis arranged coaxially with at least a part of the tool spindle.

10. The hand-held power tool according to claim 1 , wherein the hammer impact mechanism includes an eccentric element.

11. The hand-held power tool according to claim 10 , wherein the eccentric element includes a rotation axis that coincides with a rotation axis of the tool spindle.

12. The hand-held power tool according to claim 1 , wherein the hammer impact mechanism includes a striker that at least partly surrounds the tool spindle in at least one plane.

13. The hand-held power tool according to claim 1 , wherein the hammer mechanism includes a linearly moveable striker that impacts a transfer element of the tool spindle linearly in a hammer impact mode.

14. The hand-held power tool according to claim 13 , 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, the impact surface of the striker and the impact surface of the transfer element are oriented substantially parallel to one another.

15. The hand-held power tool according to claim 13 , wherein the striker is supported rotatably on the tool spindle.

16. The hand-held power tool according to claim 1 , wherein the at least one gear stage includes a sun gear arranged on the tool spindle, at least one planet wheel that meshes with the sun gear, and a ring gear that meshes with the at least one planet wheel.

17. The hand-held power tool according to claim 1 , wherein the at least one planetary gear stage element is embodied as a planet carrier.

18. The hand-held power tool according to claim 1 , wherein the at least one planetary gear stage element is embodied as a common planet carrier of the third and the fourth gear stages.

19. The hand-held power tool according to claim 1 , wherein the tool spindle includes a rotary entrainment contour adapted to create an axially displaceable and non-rotatable connection with the planetary gearbox assemblage along a rotation axis for pickoff of a rotation speed of the tool spindle in at least one operating state.

20. A hand-held power tool, comprising:
a gearbox assemblage;
a hammer impact mechanism; and
a tool spindle;
wherein the gearbox assemblage includes at least one gear stage element adapted to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode, wherein the planetary gearbox assemblage includes four gear stages, wherein the first, the second and the third gear stages are adapted to reduce rotation speed of the spindle, and the fourth gear stage is the gear stage adapted to increase the rotation speed for the impact drive, wherein the at least one planetary gear stage element is embodied as a common planet carrier of the third and the fourth gear stages,
wherein the tool spindle includes a rotary entrainment contour adapted to create an axially displaceable and non-rotatable connection to the at least one gear stage element along a rotation axis of the tool spindle,
wherein the rotary entrainment contour is configured as an internal tooth set of the at least one gear stage element and an external tooth set of the tool spindle.

21. A hand-held power tool, comprising:
a planetary gearbox assemblage;
a hammer impact mechanism including a drive rotation element; and
a tool spindle;
wherein the planetary gearbox assemblage includes at least one planetary gear stage element adapted to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode,
wherein the at least one planetary gear stage element is an element of at least one gear stage of the planetary gearbox assemblage adapted to increase a rotation speed for an impact drive in which a rotation speed of the drive rotation element is higher than a rotation speed of the tool spindle,
wherein the planetary gearbox assemblage includes four gear stages, wherein the first, the second and the third gear stages are adapted to reduce rotation speed of the spindle, and the fourth gear stage is the gear stage adapted to increase the rotation speed for the impact drive,
wherein the at least one planetary gear stage element is embodied as a common planet carrier of the third and the fourth gear stages.

22. A hand-held power tool, comprising:
a planetary gearbox assemblage;
a hammer impact mechanism including a drive rotation element; and
a tool spindle;
wherein the planetary gearbox assemblage includes at least one planetary gear stage element adapted to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode,
wherein the at least one planetary gear stage element is an element of at least one gear stage of the planetary gearbox assemblage ad

Assignees

• Hecht Joachim
• Roehm Heiko
• Herr Tobias
• Bosch Gmbh Robert

Inventors

• Hecht Joachim
• Roehm Heiko
• Herr Tobias

Classifications

• B25D2211/068

  Crank-actuated impulse-driving mechanisms · CPC title

• B25D2211/061

  Swash-plate actuated impulse-driving mechanisms · CPC title

• B25D11/062 Primary

  comprising a wobbling mechanism, swash plate · CPC title

• B25D16/006

  Mode changers; Mechanisms connected thereto · CPC title

• B25D16/003

  Clutches specially adapted therefor · CPC title