Tool device for a hand-held power tool

Patent metadata

Field	Value
Publication number	US-11052564-B2
Application number	US-201716326109-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	Aug 22, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A tool device for a hand-held power tool, which can be operated such that the tool device is rotated about an output shaft of a tool-holding device, has at least one connecting device, which is detachably connected to an output shaft of the power tool. The connecting device is fastened to the tool-holding device so that a drive axis of the output shaft and a tool axis of rotation substantially coincide. The connecting device has a cut-out and at least one clamping wing, which at least partly bounds the cut-out in the radial direction of the tool axis of rotation and which is bounded substantially in the direction radial to the tool axis of rotation by a first bounding edge, which lies on a first bounding circle around the tool axis of rotation. The clamping wing extends at least substantially along a plane orthogonal to the tool axis of rotation.

First claim

The invention claimed is:

1. A tool device for machining a workpiece and configured to be received in a hand-held power tool that rotatably drives the tool device about an output shaft of a tool receptacle device, the tool device comprising:
at least one connector device configured to be releasably connected to an output shaft of the hand-held power tool, wherein the connector device is configured to be fastened to the tool receptacle device such that an output axis of the output shaft and a tool rotation axis of the tool device substantially coincide,
wherein the connector device defines a clearance,
wherein the connector device has at least one clamping wing which at least partially delimits the clearance in a radial direction of the tool rotation axis and which, in the radial direction, is substantially delimited by a first delimitation edge which lies on a first delimitation circle about the tool rotation axis,
wherein the clamping wing extends at least substantially along an orthogonal plane to the tool rotation axis,
wherein the clamping wing is asymmetrical about every plane of symmetry defined by the radial direction and an axial direction of the tool rotation axis,
wherein the at least one clamping wing includes a torque-receiving region, which includes a drive edge and/or a drive face, configured to receive a torque in a circumferential direction about the tool rotation axis,
wherein the torque-receiving region is angled relative to the radial direction counter to a rotation direction of the tool receptacle device in the operation of the hand-held power tool such that an inner radial end of the drive edge and/or drive face is arranged circumferentially beyond an outer radial end of the drive edge and/or drive face in the rotation direction,
wherein the connector device has at least one tool assembly coding element configured, when the tool device is disposed on the tool receptacle device, for interacting with at least one assembly coding element of the tool receptacle device, and
wherein the at least one tool assembly coding element is defined in the at least one clamping wing of the connector device as a recess that extends completely through a maximum axial material thickness of the at least one clamping wing.

2. The tool device as claimed in claim 1 , wherein the clamping wing is configured as a spring wing.

3. The tool device as claimed in claim 1 , wherein:
the at least one clamping wing includes at least two clamping wings; and
a circumferential distance between each adjacent pair of clamping wings of the at least two clamping wings is smaller than a circumferential extent of the first delimitation edges of the adjacent pair of clamping wings.

4. The tool device as claimed in claim 1 , wherein the connector device includes a disk-shaped or angulated support flange.

5. The tool device as claimed in claim 4 , wherein:
the tool device has an operating region which is connected to the support flange, completely surrounds the support flange, and is configured for acting on a workpiece or a workpiece assembly, and
the operating region is disposed on the support flange in such a manner that the operating region projects in relation to the support flange in the axial direction toward the tool receptacle device of the hand-held power tool.

6. The tool device as claimed in claim 4 , wherein:
in a region of the support flange, the tool device has at least one first upper support plane and at least one second lower support plane,
said support planes are disposed so as to be substantially perpendicular to the tool rotation axis,
said support planes are mutually spaced apart by a spacing distance, and
said support planes delimit an axial extent of the support flange.

7. The tool device as claimed in claim 4 , further comprising:
an operating region configured for machining a workpiece, said operating region being connected in a materially integral and form-fitting manner to the support flange.

8. The tool device as claimed in claim 7 , wherein the support flange has a securing structure which is configured such that, in the event of a broken connection between the support flange and the operating region, the operating region is held between the support flange and the power tool by the support flange and the hand-held power tool.

9. The tool device as claimed in claim 4 , wherein the support flange delimits the clearance in the radial direction to the tool rotation axis.

10. The tool device as claimed in claim 1 , wherein:
the clamping wing is delimited substantially in the radial direction by way of a second delimitation edge which lies on a second delimitation circle about the tool rotation axis, and
wherein a diameter of the first delimitation circle in relation to a diameter of the second delimitation circle has a ratio in a range from 50 to 95%.

11. The tool device as claimed in claim 1 , wherein the torque-receiving region is defined at least in portions by at least one of an axial and a radial extent of the clamping wing.

12. The tool device as claimed in claim 1 , wherein the torque-receiving region is angled by up to 30° in the circumferential direction about the tool rotation axis relative to a plane that is defined by an axial direction and the radial direction of the tool rotation axis.

13. The tool device as claimed in claim 1 , wherein:
the at least one clamping wing includes at least two clamping wings, each of which has one torque-receiving region of the at least one torque receiving region, which includes one drive edge and/or one drive face of the drive edge and/or drive face,
the one torque receiving region for each of the at least two clamping wings is disposed so as to be mutually parallel, spaced apart, and symmetrical about the tool rotation axis relative to the one torque receiving region of other clamping wings of the at least two clamping wings.

14. The tool device as claimed in claim 1 , wherein the clearance is configured as a material cut-out that extends through the entire material thickness of the tool device, wherein the material cut-out is configured so as to completely encompass the output shaft of the hand-held power tool.

15. The tool device as claimed in claim 1 , wherein the at least one clamping wing includes an even plurality of clamping wings arranged symmetrically about the tool rotation axis.

16. A tool device for machining a workpiece and configured to be received in a hand-held power tool that rotatably drives the tool device about an output shaft of a tool receptacle device, the tool device comprising:
at least one connector device configured to be releasably connected to an output shaft of the hand-held power tool, wherein the connector device is configured to be fastened to the tool receptacle device such that an output axis of the output shaft and a tool rotation axis of the tool device substantially coincide,
wherein the connector device defines a clearance,
wherein the connector device has a plurality of clamping wings which at least partially delimit the clearance in a radial direction defined relative to the tool rotation axis and which, in the radial direction, is substantially delimited by a first delimitation edge which lies on a first delimitation circle about the tool rotation axis,
wherein each clamping wing of the plurality of clamping wings extends at least substantially along an orthogonal plane to the tool rotation axis and extends radially inwardly from a second delimitation edge, which lies on a second delimitation circle and partially defines the clearance, to the first delimitation edge,
wherein the c

Assignees

• Bosch Gmbh Robert

Inventors

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

Classifications

• B24D5/16

  Bushings; Mountings · CPC title

• B24B45/006

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

• B23B51/0473

  Details about the connection between the driven shaft and the tubular cutting part; Arbors · CPC title

• B27B5/32 Primary

  Devices for securing circular saw blades to the saw spindle · 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