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US 9,415,497 B2Granted
Hand-held power tool
AssigneeRobert Bosch GmbH
InventorsJoachim Hecht, Heiko Roehm, Tobias Herr
Life of this patent
Estimating the term…
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.
Claims40
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.
6 more elements
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.
4 more elements
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.
5 more elements
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 at least three gear stages, wherein the first and the second gear stages are adapted to reduce rotation speed of the spindle, and the third gear stage is the gear stage adapted to increase a rotation speed for the impact drive,
- wherein the third 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.
6 more elements
Dependencies are inferred from the claim text.