Hand-power tool with an oscillation-damping device

Patent metadata

Field	Value
Publication number	US-10071468-B2
Application number	US-201013515652-A
Country	US
Kind code	B2
Filing date	Oct 22, 2010
Priority date	Dec 16, 2009
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A hand-power tool includes at least one oscillation-damping device that has at least one damping spring, a damping mass, and a mechanism housing. The oscillation-damping device has at least two retaining parts that at least partly enclose the damping mass.

First claim

The invention claimed is:

1. A portable power tool, comprising:
at least one vibration absorbing device which includes:
an absorption mass;
at least one absorption spring defining a spring direction along which the at least one absorption spring transmits a spring force to the absorption mass;
at least two holding parts at least partially enclosing the absorption mass such that the at least two holding parts surround at least one point of the absorption mass on a plane oriented perpendicularly to the spring direction; and
at least one spring receptacle connected in a form-fitting and mechanically fixed manner to the absorption mass; and

a mechanism housing.

2. The portable power tool as claimed in claim 1 , wherein the at least one absorption spring is configured to exert a fastening force on the mechanism housing, the at least one absorption spring and the mechanism housing being configured such that the fastening force counteracts and prevents a movement of at least a portion of the vibration absorbing device in at least one operating state.

3. The portable power tool as claimed in claim 1 , wherein the holding parts are formed as identical parts having identical external dimensions.

4. The portable power tool as claimed in claim 1 , wherein the holding parts are configured to guide the absorption spring such that the holding parts exert a bearing force on the absorption spring in a direction perpendicular to the spring direction.

5. The portable power tool as claimed in claim 1 , wherein the mechanism housing includes a housing cover which has a fastening mechanism configured to fasten at least a portion of the vibration absorbing device such that the portion of the vibration absorbing device cannot move in relation to the housing cover.

6. The portable power tool as claimed in claim 1 , wherein the at least one spring receptacle exerts an acceleration force on the absorption mass in a first operating state and exerts an opposition force on the holding part in a second operating state.

7. The portable power tool as claimed in claim 6 , further comprising:
at least one support element configured to exert a support force on the at least one spring receptacle in a direction opposite the acceleration force exerted by the absorption spring.

8. The portable power tool as claimed in claim 1 , wherein the absorption spring is arranged entirely in an axial region of the absorption mass that is bounded by two planes oriented perpendicularly to the spring direction and which intersect the absorption mass.

9. The portable power tool as claimed in claim 1 , wherein the at least one spring receptacle includes a contact surface abutting the absorption mass, and the at least one spring receptacle is configured such that the form-fitting connection transmits a first force between the at least one spring receptacle and the absorption mass over the contact surface in a force direction, and the contact surface extends perpendicular to the force direction.

10. A vibration absorbing system for a portable power tool, comprising:
at least one vibration absorbing device which includes:
an absorption mass;
at least one absorption spring defining a spring direction along which the at least one absorption spring transmits a spring force to the absorption mass;
at least two holding parts at least partially enclosing the absorption mass such that the at least two holding parts surround at least one point of the absorption mass on a plane oriented perpendicularly to the spring direction; and
at least one spring receptacle connected in a form-fitting and mechanically fixed manner to the absorption mass; and

a mechanism housing.

Assignees

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

Inventors

• Kuhnle Alex
• 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

• B25D17/24

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

• B25D2211/068

  Crank-actuated impulse-driving mechanisms · CPC title

• B25F5/006 Primary

  Vibration damping means · CPC title

• B25D2217/0092

  being spring-mounted · CPC title