Power tool

Patent metadata

Field	Value
Publication number	US-11980947-B2
Application number	US-201716326746-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	Aug 22, 2016
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

A power tool, in particular a hand-held power tool, includes a tool-holding device that rotates about an output axis. The tool-holding device is configured to hold a tool device on the power tool such that the output axis and a tool rotation axis substantially coincide. The tool-holding device has at least a driver device and a clamping device that is movable relative to the driver device. To transfer a driving force to the tool device, the driver device has at least one torque transfer region that is arranged at a distance from the output axis. The driver device and the clamping device are configured to reach through a cut-out of the tool device, which cut-out extends through the entire material thickness of the tool device, and to clamp the tool device via the clamping device, which is movable substantially in a direction radial to the output axis.

First claim

The invention claimed is:

1. A power tool, comprising:
a tool receiving device configured to be moved in rotation about an output axis and hold a tool device on the power tool such that the output axis and a tool rotation axis substantially coincide, the tool receiving device comprising:
at least one driving device having at least one torque transmission region arranged at a distance from the output axis so as to transmit a driving force to the tool device; and
a clamping device that is movable relative to the driving device,

wherein:
the driving device and the clamping device are both configured to reach through a single cutout of the tool device that extends through the entire material thickness of a connection region of the tool device,
the clamping device is movable substantially in a radial direction in relation to the output axis to clamp the tool device, and
when the clamping device is in a release state, the clamping device projects, in an axial direction relative to the output axis, beyond the driving device in a direction oriented away from the power tool.

2. The power tool as claimed in claim 1 , wherein the tool receiving device defines an axial opening in which the clamping device is arranged.

3. The power tool as claimed in claim 2 , wherein the driving device comprises:
at least two driving jaws that delimit at least part of the axial opening in the radial direction, the at least two driving jaws configured to guide the clamping device of the tool receiving device in the radial direction,
wherein the at least two driving jaws are arranged parallel to and spaced apart from each other, the at least two driving jaws being symmetrical around the output axis.

4. The power tool as claimed in claim 3 , wherein the at least one torque transmission region is arranged on each of the at least two driving jaws and includes an output edge or surface, and wherein one or more of:
(i) the output edge or surface is rectilinear, flat, or curved,
(ii) the output edge or surface is angled contrary to a direction of rotation of the tool receiving device when the power tool is in operation,
(iii) the at least one torque transmission region includes at least two torque transmission regions, each having a respective output edge or surface, which are oriented away from each other, and which are substantially parallel to each other, and
(iv) the output edge or surface is angled with respect to a plane spanned by the axial direction and the radial direction of the output axis, in a circumferential direction around the output axis.

5. The power tool as claimed in claim 2 , wherein:
the clamping device includes two hook jaws arranged in the axial opening adjacent to the output axis, and
the at least one driving device includes two driving jaws, each of which delimits the axial opening and is adjacent to both of the two hook jaws so as to guide the two hook jaws in the axial opening.

6. The power tool as claimed in claim 1 , wherein the driving device has a maximal radial extent relative to the output axis that is greater than a maximal radial extent of the clamping device in a fastening state.

7. The power tool as claimed in claim 1 , wherein the tool receiving device has a flat seating surface that extends orthogonally in relation to the output axis and that is configured to support the tool device in the axial direction.

8. The power tool as claimed in claim 1 , wherein the tool receiving device has an actuation device that is configured, upon an axial actuation of the actuation device by an actuating force, to bring the clamping device from the release state, in which the tool device is configured to be removed from the tool receiving device, into a fastening state, in which the tool device is fastened to the tool receiving device.

9. The power tool as claimed in claim 1 , wherein the driving device comprises at least one mounting coding element that is one or more of:
(i) configured to act in combination with a tool mounting coding element of the tool device when the tool device has been arranged on the tool receiving device,
(ii) arranged on at least one driving jaw of the driving device, and
(iii) arranged so as to adjoin an inner circumferential surface of the at least one driving jaw.

10. The power tool as claimed in claim 1 , wherein the clamping device comprises one or more of:
at least one hook device that comprises at least one mounting coding element; and
a hook jaw having a clamping cutout in which the mounting coding element is arranged.

11. A power tool system, comprising:
at least one power tool comprising the tool receiving device as claimed in claim 1 ; and
the tool device having the single cutout, the tool device is configured to be received in the tool receiving device such that both the at least one driving device and the clamping device reach through the single cutout of the tool device, wherein the tool receiving device holds the tool device on the power tool such that the output axis of the power tool and a tool rotation axis of the tool device substantially coincide.

12. The power tool system as claimed in claim 11 , wherein the clamping device has at least one clamping surface configured to transmit an axial action of force to the tool device, wherein the at least one driving device has at least one torque transmission region configured to transmit a torque, in the circumferential direction around the output axis, to the tool device, wherein the tool device has a tool rotation axis and a connection device, the connection device having a cutout that is configured to at least partly encompass the tool receiving device of the hand-held power tool in the circumferential direction of the output axis, wherein the tool device has at least one torque take-up region that is spaced apart radially from the tool rotation axis, wherein the torque take-up region delimits the cutout, at least in sections, in the radial direction of the tool rotation axis, wherein the clamping device exerts an action of force upon the tool device in the region of the clamping surface, wherein the action of force has at least one component in the axial direction of the tool rotation axis, wherein the connection device extends in the axial direction between a first connection surface and a second connection surface that faces away from the first connection surface, wherein the first and second connection surfaces are arranged orthogonally in relation to the tool rotation axis, wherein the first and second connection surfaces form a material thickness of the connection device, and wherein the at least one torque take-up region is arranged between the first and second connection surfaces.

13. The power tool system as claimed in claim 12 , wherein the tool receiving device has a flat seating surface that is configured to support at least one contact surface of the tool device in the axial direction such that the seating surface extends, in the radial direction of the tool rotation axis, between a radial inner distance and a radial outer distance from the output axis, wherein the connection device of the tool device has at least one clamping wing, which at least partly delimits the cutout in the radial direction and which is delimited substantially in the radial direction in relation to the tool rotation axis by a first delimiting edge that lies on a first delimiting circle around the tool rotation axis, wherein, when the tool device has been fastened to the power tool, the first delimiting edge of the clamping wing of the tool device projects with respect to the radial inner distance of the seating surface, in the radial direction in relation to the outp

Assignees

• Bosch Gmbh Robert

Inventors

• Fellmann Willi
• Luescher Bruno
• Di Nicolantonio Aldo
• Zurbruegg Andreas
• Sinzig Bruno
• Quebatte Laurent
• Schuller Marcus

Classifications

• B24B23/028

  Angle tools · CPC title

• B24B23/022 Primary

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

• B23B31/10 Primary

  characterised by the retaining or gripping devices or their immediate operating means · CPC title

• B23D61/10

  clamped between hubs; Clamping or aligning devices therefor · CPC title

• B24B45/006 Primary

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