Tool holder

Patent metadata

Field	Value
Publication number	US-9694472-B2
Application number	US-201314383610-A
Country	US
Kind code	B2
Filing date	Jan 23, 2013
Priority date	Mar 8, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A tool holder, particularly a hand-held power tool holder, is provided for an oscillating and/or rotational drive of at least one insertion tool. The tool holder includes at least one holder-side fastening element that is provided at least substantially for a coupling with the at least one insertion tool. The tool holder also includes at least one bearing unit provided for movably mounting the at least one holder-side fastening element in a movement at least partially deviating from an axial direction. The movement at least partially deviating from the axial direction of the at least one fastening element is provided at least substantially for creating a fastening force in the axial direction.

First claim

The invention claimed is:

1. A hand-held power tool, comprising:
a drive shaft configured to be driven with a driving motion by the power tool;
a tool holder configured to drive at least one insert tool in an oscillating and/or rotational manner, the tool holder including:
at least one fastening element configured at least substantially to couple with the at least one insert tool;
at least one further fastening element that is fixed to the drive shaft and configured to at least substantially pass through and geometrically engage with at least one fastening recess of the at least one insert tool so as to radially and circumferentially secure the at least one insert tool to the tool holder and to transmit the driving motion of the drive shaft to the at least one insert tool via the geometric engagement; and
at least one bearing unit configured to mount the at least one fastening element so as to be movable into a movement which deviates at least in part from an axial direction,

wherein the movement, which deviates at least in part from the axial direction, of the at least one fastening element is configured at least substantially to generate a fastening force in the axial direction.

2. The hand-held power tool as claimed as claim 1 , wherein the at least one fastening element defines at least one transforming face that is configured to engage at least one fastening recess of the at least one insert tool in a direction of the movement, and that is oriented at an angular inclination relative to the axial direction such that the transforming face transforms the movement into a fastening force, formed at least substantially by a clamping force, in the axial direction as the transforming face engages the at least one fastening recess of the at least one insert tool.

3. The hand-held power tool as claimed as claim 1 , wherein the at least one fastening element includes a transforming region having a concave cone shape,
the tool holder further including at least one clamping element that has at least one cone-shaped region, and that is configured to move axially so that the cone-shaped region engages the concave cone shape of the at least one fastening element to transform movement of the at least one clamping element in the axial direction into the movement of the at least one fastening element that deviates from the axial direction.

4. The hand-held power tool as claimed as claim 1 , wherein the at least one bearing unit is configured to mount the at least one fastening element so as to be movable at least in part into a radial direction relative to a drive axis.

5. The hand-held power tool as claimed as claim 1 , wherein the at least one bearing unit is configured to mount the at least one fastening element so as to be pivotable at least in part.

6. The hand-held power tool as claimed as claim 1 , wherein the at least one fastening element is configured to project over the drive shaft at least substantially in the axial direction.

7. The hand-held power tool of claim 1 , wherein:
the at least one fastening element defines at least one first transformation surface and at least one second transformation surface, the at least one second transformation surface configured to at least substantially pass through the at least one fastening recess of the at least one insert tool in a coupled position of the at least one insert tool;
the tool holder further includes at least one clamping element that is mounted so as to be axially displaceable and that defines at least one third transformation surface;
the at least one third transformation surface is configured to engage with the at least one first transformation surface as the at least one clamping element is axially displaced to move the at least one fastening element along the movement; and
the movement is configured to cause the at least one second transformation surface to engage the at least one fastening recess of the at least one fastening element and generate the fastening force in the axial direction.

Assignees

• Bosch Gmbh Robert

Inventors

• Luescher Bruno
• Mueller-Boysen Ulrich
• Kreissig Albrecht
• Waibel Tobias

Classifications

• B24B45/006 Primary

  Quick mount and release means for disc-like wheels, e.g. on power tools · CPC title

• Y10T279/33

  Member applies axial force component · CPC title

• B27B5/30

  for mounting or securing saw blades or saw spindles · CPC title

• B24B27/08

  being portable · CPC title

• B27B19/006

  with oscillating saw blades; Hand saws with oscillating saw blades · CPC title