Power tool brake mechanism

Patent metadata

Field	Value
Publication number	US-9546701-B2
Application number	US-201214119627-A
Country	US
Kind code	B2
Filing date	Mar 29, 2012
Priority date	May 24, 2011
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

A power tool brake mechanism, in particular a portable power tool brake mechanism, includes at least one mechanical brake unit that has at least one brake element mounted rotatably about a rotation axis and at least one actuating unit that has at least one movably mounted actuating element. The actuating unit is configured to activate and/or deactivate the brake unit. The power tool brake mechanism further includes at least one movement converting unit that has at least one movement converting element configured to convert a movement of the actuating element into a movement of a counter-brake element of the brake unit. The movement of the counter-brake element is at least in a direction that is different from a direction extending along the rotation axis of the brake element.

First claim

The invention claimed is:

1. A power-tool braking device, comprising:
at least one mechanical braking unit that includes:
at least one braking element mounted so as to be rotatable about a rotation axis; and
a counter braking element configured to move relative to the at least one braking element;

at least one actuating unit that includes at least one movably mounted actuating element, the actuating unit being configured to one or more of activate and deactivate the at least one braking unit; and
at least one movement conversion unit that includes at least one movement conversion element configured to convert a movement of the at least one actuating element into a movement of the counter-braking element of the at least one braking unit, at least in a direction that is substantially transverse from a direction extending along the rotation axis of the at least one braking element, and that is substantially transverse from a direction of motion of the at least one actuating element.

2. The power-tool braking device as claimed in claim 1 , wherein the at least one movement conversion element is pivotably mounted.

3. The power-tool braking device as claimed in claim 1 , wherein the at least one braking unit further includes:
at least one spring element configured to apply a spring force to the counter-braking element in the direction of the braking element.

4. The power-tool braking device as claimed in claim 1 , wherein the at least one movement conversion element is configured as a rocker having a pivot axis that is at least substantially perpendicular to the rotation axis.

5. The power-tool braking device as claimed in claim 4 , wherein:
the at least one actuating unit further includes a coupling element that is fixed to the at least one actuating element so as to convert the movement of the at least one actuating element; and
the rocker has at least one angled region configured to act in combination with the coupling element of the at least one actuating unit.

6. The power-tool braking device as claimed in claim 4 , wherein the counter-braking element is fixed to the rocker.

7. The power-tool braking device as claimed in claim 1 , wherein the at least one movement conversion unit is configured as a cam mechanism.

8. The power-tool braking device as claimed in claim 7 , wherein:
the at least one movement conversion unit further includes at least one further movement conversion element; and
the at least one the movement conversion element is configured as a pin configured to act in combination with the at least one further movement conversion element of the movement conversion unit so as to convert the movement of the at least one actuating element.

9. The power-tool braking device as claimed in claim 8 , wherein the at least one further movement conversion element is configured as a groove in which the pin partially engages.

10. The power-tool braking device as claimed in claim 1 , wherein the power-tool braking device is configured as a hand power-tool braking device.

11. A portable power tool, comprising:
at least one power-tool braking device, the power-tool braking device including:
at least one mechanical braking unit having:
at least one braking element mounted so as to be rotatable about a rotation axis; and
a counter braking element configured to move relative to the at least one braking element;

at least one actuating unit that includes at least one movably mounted actuating element, the at least one actuating unit being configured to one or more of activate and deactivate the at least one braking unit; and
at least one movement conversion unit having at least one movement conversion element configured to convert a movement of the at least one actuating element into a movement of the counter-braking element of the at least one braking unit, at least in a direction that is substantially transverse from a direction extending along the rotation axis of the at least one braking element, and that is substantially transverse from a direction of motion of the at least one actuating element.

12. The portable power tool as claimed in claim 11 , wherein the portable power tool is configured as an angle grinder.

13. A power-tool braking device, comprising:
a mechanical braking unit operable to brake a power tool, including:
a braking element mounted to be rotatable about a rotation axis; and
a counter braking element configured to move relative to the braking element;

an actuating unit configured to operate the braking unit, and including a movably mounted actuating element; and
a movement conversion unit that includes:
a rocker that is pivotably mounted about a pivot axis that is at least substantially perpendicular to the rotation axis,
the rocker configured to convert a movement of the actuating element into a different movement of the counter-braking element, and
the different movement being in a direction that differs from a direction extending along the rotation axis.

14. The power-tool braking device as claimed in claim 13 , wherein the braking unit further includes:
at least one spring element configured to apply a spring force to the counter-braking element in a direction of the braking element.

15. The power-tool braking device as claimed in claim 13 , wherein:
the actuating unit further includes a coupling element fixed to the actuating element; and
the rocker defines at least one angled region, configured to act in combination with the coupling element to convert the movement of the actuating element.

16. The power-tool braking device as claimed in claim 13 , wherein the counter-braking element is fixed to the rocker.

Assignees

• Wiker Juergen
• Schadow Joachim
• Maute Joerg
• Esenwein Florian
• Lutz Manfred
• Bosch Gmbh Robert

Inventors

• Wiker Juergen
• Schadow Joachim
• Maute Joerg
• Esenwein Florian
• Lutz Manfred

Classifications

• B24B23/022 Primary

  Spindle-locking devices, e.g. for mounting or removing the tool · CPC title

• B24B23/02

  with rotating grinding tools; Accessories therefor · CPC title

• F16D63/006 Primary

  Positive locking brakes · CPC title