Tool chucking device

Patent metadata

Field	Value
Publication number	US-9463547-B2
Application number	US-201113981524-A
Country	US
Kind code	B2
Filing date	Dec 27, 2011
Priority date	Jan 25, 2011
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A tool chucking device, especially an oscillation tool chucking device, includes at least one chucking unit which has at least one chucking element for clamping a treatment tool in an axial direction and at least one control unit for actuating the chucking element. The tool chucking device further includes at least one conversion unit which is designed to modify a conversion ratio depending on at least one movement component of a control element of the control unit.

First claim

The invention claimed is:

1. A tool clamping fixture, comprising:
at least one clamping unit having (i) at least one clamping element configured to clamp a machining tool in an axial direction and (ii) at least one control unit configured to actuate the at least one clamping element; and
at least one conversion unit operatively connected to the at least one clamping element and the at least one control unit, and configured to alter a conversion ratio in dependence on movement of a control element of the at least one control unit, the at least one conversion unit including a control cam surface including a first cam surface portion defining a first cam pitch and a second cam surface portion defining a second cam pitch,
wherein the first cam pitch is different from the second cam pitch,
wherein the conversion ratio is a ratio of a change in position of the control element to a change in position of the at least one clamping element, and
wherein the control element of the at least one control unit is configured as a control lever mounted pivotably about a pivot axis running parallel to the axial direction.

2. The tool clamping fixture as claimed in claim 1 , wherein the conversion unit has at least one scanning element configured to move the clamping element in dependence on the course of the control cam along the axial direction.

3. The tool clamping fixture as claimed in claim 2 , wherein the scanning element is configured as a bolt.

4. The tool clamping fixture as claimed in claim 3 , wherein the bolt has a longitudinal extent which, in a mounted state, runs along a direction extending at least substantially perpendicular to the axial direction.

5. The tool clamping fixture as claimed in claim 1 , further comprising at least one decoupling element configured to decouple the control unit in at least one operating mode from a motion of the clamping element.

6. The tool clamping fixture as claimed in claim 1 , wherein the control unit comprises at least one scanner receiving element configured to receive a scanning element of the conversion unit, the scanner receiving element being connected at least in a rotationally fixed manner to the control lever.

7. The tool clamping fixture as claimed in claim 1 , wherein the tool clamping fixture is an oscillation tool clamping fixture.

8. The portable machine tool as claimed in claim 1 , wherein the decoupling unit has at least one stop element configured to limit a motion of the clamping element along the axial direction in the direction of the control unit.

9. The portable machine tool as claimed in claim 1 , wherein the first cam pitch and the second cam pitch are mutually differing with respect to a surface of the at least one conversion unit.

10. The portable machine tool as claimed in claim 1 , wherein the control element extends from a portion of the at least one conversion unit and is movable relative to the at least one clamping element.

11. A tool clamping fixture, comprising:
at least one clamping unit having (i) at least one clamping element configured to clamp a machining tool in an axial direction and (ii) at least one control unit configured to actuate the clamping element;
at least one conversion unit operatively connected to the at least one clamping unit and the at least one control unit, and configured to alter a conversion ratio in dependence on movement of a control element of the control unit; and
at least one decoupling element configured to decouple the control unit in at least one operating mode from a motion of the clamping element,
wherein the decoupling unit has at least one stop element configured to limit a motion of the clamping element along the axial direction in the direction of the control unit, and
wherein the conversion ratio is a ratio of a change in position of the control element to a change in position of the clamping element.

12. A portable machine tool, comprising:
at least one tool clamping fixture including:
at least one clamping unit having (i) at least one clamping element configured to clamp a machining tool in an axial direction and (ii) at least one control unit configured to actuate the at least one clamping element; and
at least one conversion unit operatively connected to the at least one clamping element and the at least one control unit, and configured to alter a conversion ratio in dependence on movement of a control element of the at least one control unit, the at least one conversion unit including a control cam surface including a first cam surface portion defining a first cam pitch and a second cam surface portion defining a second cam pitch,

wherein the first cam pitch is different from the second cam pitch,
wherein the conversion ratio is a ratio of a change in position of the control element to a change in position of the at least one clamping element, and
wherein the control element of the at least one control unit is configured as a control lever mounted pivotably about a pivot axis running parallel to the axial direction.

13. The portable machine tool as claimed in claim 12 , wherein the portable machine has an oscillatingly drivable spindle.

Assignees

• Fankhauser Marcel
• Luescher Bruno
• Bosch Gmbh Robert

Inventors

• Fankhauser Marcel
• Luescher Bruno

Classifications

• B27B19/006

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

• B24B45/00

  Means for securing grinding wheels on rotary arbors (suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00) · CPC title

• B24B45/006

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

• B24B23/046

  Clamping or tensioning means for abrasive sheets · CPC title

• B24B23/04 Primary

  with oscillating grinding tools; Accessories therefor · CPC title