Hand-power tool comprising an oscillation-damping device

Patent metadata

Field	Value
Publication number	US-9358677-B2
Application number	US-201013515788-A
Country	US
Kind code	B2
Filing date	Oct 22, 2010
Priority date	Dec 16, 2009
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A hand-power tool includes at least one oscillation-damping device that has at least one damping spring and a damping mass. The hand-power tool also includes a drive mechanism and a mechanism housing. The mechanism housing has a housing cover which is provided for closing a chamber in which the drive mechanism lies, and the housing cover has at least one fixing mechanism that at least partially fixes the oscillation-damping device in at least one operating state.

First claim

The invention claimed is:

1. A hand power tool, comprising:
a drive mechanism,
a mechanism housing defining (i) a chamber in which the drive mechanism is disposed and (ii) an opening leading into the chamber,
at least one vibration absorber device which has at least one absorber spring, an absorber mass, and a first holding part supporting an outermost axial end of the absorber mass, the at least one absorber spring defining a spring direction and the first holding part engaging the absorber mass such that the first holding part, the absorber spring, and the absorber mass are at least partially disposed on at least one same plane that is aligned normal to the spring direction, and
a housing cover having (i) an external surface facing away from the opening, (ii) an internal surface facing towards the opening, and (iii) at least one integrally-formed fastening mechanism extending from the internal surface and defining at least one planar fastening surface arranged normal to the spring direction,
wherein the absorber spring is configured to press the vibration absorber device into the planar fastening surface such that the vibration absorber device is completely retained on the housing cover by contact between the vibration absorber device and the planar fastening surface, and
wherein the housing cover and the retained vibration absorber device constitute a preassembled structural unit that (i) extends through the opening to the chamber and closes the chamber when the preassembled structural unit is connected to the mechanism housing and (ii) is spaced from and moveable relative to the hand power tool when the preassembled structural unit is disconnected from the mechanism housing.

2. The hand power tool as claimed in claim 1 , wherein the at least one vibration absorber device and the drive mechanism are disposed in the chamber closed by the structural unit.

3. The hand power tool as claimed in claim 1 , wherein the at least one absorber spring is configured to effect a fastening force upon the housing cover while the at least one vibration absorber device is retained on the housing cover.

4. The hand power tool as claimed in claim 1 , wherein:
the drive mechanism has a percussion mechanism, and
the percussion mechanism and the at least one vibration absorber device are at least partially disposed on at least one same plane that is aligned normal to the spring direction.

5. The hand power tool as claimed in claim 1 , wherein:
the at least one vibration absorber device has second holding part, and
the first holding part and the second holding part are supported against each other through the at least one absorber spring.

6. The hand power tool as claimed in claim 1 , wherein the at least one vibration absorber device has at least one spring receiver that, in at least one operating state, exerts an acceleration force upon the absorber mass and, in at least one operating state, supports a counter force of the acceleration force on the first holding part.

7. The hand power tool as claimed in claim 6 , wherein the at least one vibration absorber device has at least one support element that is configured to, in at least one operating state, press the spring receiver against the absorber spring.

8. The hand power tool as claimed in claim 1 , wherein the at least one absorber spring is disposed entirely in an axial region of the absorber mass.

Assignees

• Kuhnle Axel
• Tauber Matthias
• Bochert Juergen
• Diem Carsten
• Braun Willy
• Wiedemann Christian
• Kaiser Joerg
• Heinen Patrick
• Hahn Roger
• Speda Thomas
• Bosch Gmbh Robert

Inventors

• Kuhnle Axel
• Tauber Matthias
• Bochert Juergen
• Diem Carsten
• Braun Willy
• Wiedemann Christian
• Kaiser Joerg
• Heinen Patrick
• Hahn Roger
• Speda Thomas

Classifications

• B25D2250/121

  Housing details · CPC title

• B25D2217/0092

  being spring-mounted · CPC title

• B25D17/24

  Damping the reaction force {(resiliently mounted handles B25D17/043; dampers in connections of hammers to backhoes E02F3/966)} · CPC title

• B25F5/006 Primary

  Vibration damping means · CPC title