Tool Device for a Hand-Held Power Tool

Patent metadata

Field	Value
Publication number	US-2021221021-A1
Application number	US-202117173768-A
Country	US
Kind code	A1
Filing date	Feb 11, 2021
Priority date	Aug 22, 2016
Publication date	Jul 22, 2021
Grant date	—

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

1 - 28 . (canceled)

29 . A tool device for machining a workpiece, comprising:
a connector device defining a clearance and configured to be releasably connected to a tool receptacle device of the hand-held power tool such that an output axis of an output shaft of the hand-held power tool and a tool rotation axis of the tool device substantially coincide, the connector device comprising:
a plurality of clamping wings extending radially inwardly at least substantially along an orthogonal plane to the tool rotation axis, each clamping wing of the plurality of clamping wings including a first delimitation edge that lies on a first delimitation circle defined around the tool rotation axis and that and that at least partially defines a radial extent of the clearance.

30 . The tool device as claimed in claim 29 , wherein a circumferential distance along the first delimitation circle between each adjacent pair of clamping wings is less than a circumferential extent of the first delimitation edges of the adjacent pair of clamping wings.

31 . The tool device as claimed in claim 30 , wherein the circumferential distance between each adjacent pair of clamping wings is up to 50% less than the circumferential extent of the first delimitation edges of the adjacent pair of clamping wings.

32 . The tool device as claimed in claim 30 , wherein the clearance is further defined by a plurality of second delimitation edges, which extend circumferentially between adjacent clamping wings along a second delimitation circle that has a greater diameter than the first delimitation circle.

33 . The tool device as claimed in claim 32 , wherein a first diameter of the first delimitation circle is between 50% and 95% of a second diameter of the second delimitation circle.

34 . The tool device as claimed in claim 32 , wherein each clamping wing includes a torque-receiving region between the first delimitation edge and an adjacent one of the plurality of second delimitation edges, the torque-receiving region including a drive edge and/or a drive face configured to receive torque applied in the circumferential direction,

35 . The tool device as claimed in claim 34 , wherein each torque-receiving region is angled relative to a 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.

36 . The tool device as claimed in claim 35 , 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.

37 . The tool device as claimed in claim 35 , wherein each torque-receiving region is defined at least in portions by at least one of an axial and a radial extent of the associated clamping wing.

38 . The tool device as claimed in claim 29 , wherein each clamping wing is asymmetrical about every plane of symmetry defined by the radial direction and an axial direction of the tool rotation axis,

39 . The tool device as claimed in claim 29 , wherein the connector device further comprises at least one tool assembly coding element configured, when the tool device is mounted on the tool receptacle device, to interact with at least one assembly coding element of the tool receptacle device.

40 . The tool device as claimed in claim 39 , wherein the at least one tool assembly coding element is defined in each clamping wing of the plurality of clamping wings as a recess that extends completely through a maximum axial material thickness of the clamping wing.

41 . The tool device as claimed in claim 29 , wherein each clamping wing is configured as a spring wing that is elastically flexural in an axial direction.

42 . The tool device as claimed in claim 41 , wherein each clamping wing has a maximum benchmark that corresponds to a spring rate of between 10,000 N/mm and 350,000 N/mm.

43 . The tool device as claimed in claim 29 , wherein the connector device further comprises a disk-shaped or angulated support flange.

44 . The tool device as claimed in claim 43 , further comprising:
an operating region connected to the support flange and completely surrounding the support flange, the operating region configured to operate on a workpiece or a workpiece assembly, wherein the operating region is disposed on the support flange in such a manner that the operating region projects in an axial direction from the support flange toward the tool receptacle device of the hand-held power tool.

45 . The tool device as claimed in claim 44 , wherein the support flange has a support lip extending radially and overlapping the operating region on a side of the operating region configured for operating on the workpiece 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 lip.

46 . The tool device as claimed in claim 29 , wherein the clearance is configured as a material cut-out that extends through the entire material thickness of the tool device and completely encompasses the output shaft of the hand-held power tool.

47 . The tool device as claimed in claim 29 , wherein the plurality of clamping wings includes an even plurality of clamping wings arranged symmetrically about the tool rotation axis.

48 . A power tool system comprising:
at least one hand-held power tool having a tool receptacle device and an output shaft with defining output axis; and a tool device comprising:
a connector device defining a clearance and configured to be releasably connected to the tool receptacle device such that the output axis of the output shaft and a tool rotation axis of the tool device substantially coincide, the connector device comprising,
a plurality of clamping wings extending radially inwardly at least substantially along an orthogonal plane to the tool rotation axis, each clamping wing of the plurality of clamping wings including a first delimitation edge that lies on a first delimitation circle defined around the tool rotation axis and that and that at least partially defines a radial extent of the clearance.

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