Machine tool with tool-accommodating device

Patent metadata

Field	Value
Publication number	US-10471518-B2
Application number	US-201414909247-A
Country	US
Kind code	B2
Filing date	Jul 25, 2014
Priority date	Aug 1, 2013
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

The invention relates to a machine tool, in particular a hand held machine tool, which has a tool-accommodating device which can be moved, in particular in oscillating fashion, about a drive axis, in order to retain a tool device on the machine tool. The tool-accommodating device has at least one clamping device, at least one retaining device and at least one locking device. The retaining device can be moved from at least one first, open position into at least one second, closed position. It is also the case that the retaining device can be forced by a clamping force, by way of the clamping device, preferably in the closing direction from said first, open position in the direction of said second, closed position. The locking device can be moved between at least one first, locking position and at least one second, unlocking position. It is possible here for said locking device to block movement of the retaining device in at least one locking position. A force applied to the locking device directly or indirectly by the tool device moves said locking device from one of said locking positions into one of said unlocking positions. This allows the tool device to be inserted particularly quickly and straightforwardly into the machine tool.

First claim

What is claimed is:

1. A machine tool, which has a tool receiving device moving around a driving axis,
wherein the tool receiving device is adapted to hold a tool device on the machine tool such that the driving axis and a tool axis of rotation are substantially coincident,
wherein the tool receiving device has at least one clamping device, at least one holding device and at least one locking device,
wherein the holding device can be moved from a first open position into a second closed position, wherein a clamping force can be applied onto the holding device by the clamping device, wherein when the holding device is in the second closed position the holding device extends at least partly into or through the tool device,
wherein the locking device can be moved between a first locking position and a second unlocking position, wherein the locking device is adapted to cooperate with the holding device, wherein a movement of the holding device can be blocked in the first open position by the locking device when the locking device is in the first locking position, and
wherein the locking device is designed such that the locking device can be moved from the first locking position into the second unlocking position by a force, which has been applied by the tool device on the holding device, which acts on the locking device.

2. The machine tool according to claim 1 , wherein the clamping device has at least one spring device and that the spring device is selected from a group of devices comprising at least:
a gas or oil pressure spring device,
a sheet or diaphragm spring device,
a spiral spring device,
a coil spring,
a torsion spring,
a torsion bar spring,
an elastomeric spring device,
a magnetic and electromagnetic spring device, and
a combination of several of the devices.

3. The machine tool according to claim 1 , wherein the holding device is rotatably mounted in at least one direction of rotation and/or that at least in one direction the holding device is translatory mounted.

4. The machine tool according to claim 1 , wherein the machine tool comprises two of the holding devices.

5. The machine tool according to claim 4 , wherein each of the two holding devices are movable in substantially opposite directions.

6. The machine tool according to claim 1 , wherein
a locking force action can be applied from the locking device on the clamping device in the locking position,
a unlocking force action can be applied from the tool device on the locking device, and
the unlocking force action is opposite to the locking force action.

7. The machine tool according to claim 6 , wherein
the locking device comprises a first locking surface section and a second locking surface section,
the first locking surface section contacts directly or indirectly the second locking surface section, and
at least one component of the clamping force is directed substantially parallel to at least a normal to the first locking surface section or to the second locking surface section.

8. The machine tool according to claim 7 , wherein the first locking surface section is mounted in regard to the second locking surface section in the locking position and is mounted with sliding bearings.

9. The machine tool according to claim 1 , wherein
the clamping device comprises a moving element,
the moving element can be moved along a first direction of movement,
the locking device has a contact surface, and
the contact surface is adapted to be contacted by the moving element.

10. The machine tool according to claim 9 , wherein
when the locking device is substantially in the first locking position, a normal to the contact surface in a contact point with the moving element includes an angle γ1 with the first direction of movement of the moving element, and
the angle γ1 is larger than 80 degrees and
smaller than or equal to 315 degrees.

11. The machine tool according to claim 9 ,
when the locking device is substantially in the second unlocking position, a normal to the contact surface in a contact point with the moving element includes an angle γ2 with the first direction of movement of the moving element, and
the angle γ2 is smaller than or equal to 180 degrees and larger than 95 degrees.

12. The machine tool according to claim 1 , wherein
a connection device of the machine tool comprises a torque transmission section, the torque transmission section comprises at least two output area region each having a plurality of surface points for transmitting a driving force to the tool device, wherein the torque transmission section is spaced apart to the driving axis,
tangent planes on the surface points are inclined in regard to an axial plane, which includes the driving axis, and
these tangent planes are inclined in regard to a radial plane, which extends perpendicular to the driving axis.

13. The machine tool according to claim 12 , wherein at least one of the at least two output area regions are at least in sections substantially planar.

14. The machine tool according to claim 13 , wherein at least one of the at least two output area regions are at least partially curved.

15. The machine tool according to claim 12 , wherein
the torque transmission area has at least one first upper boundary plane and at least one second lower boundary plane,
the at least one first upper boundary plane and the at least one second lower boundary plane are substantially perpendicular to the driving axis,
the at least one first upper boundary plane and the at least one second lower boundary plane are spaced apart from each other, and
each of the at least two output area regions is disposed between one of the at least one first upper boundary plane and one of the at least one second lower boundary plane.

16. The machine tool according to claim 15 , wherein a plurality of the at least two output area regions extend between one single first upper boundary plane and one single second lower boundary plane.

17. The machine tool according to claim 12 , wherein the torque transmission region has a plurality of output area regions which are arranged rotationally symmetrical around the driving axis.

18. The machine tool according to claim 12 , wherein
at least two of the at least two output area regions are arranged symmetrically to a plane of symmetry,
the driving axis is located in the plane of symmetry, and
the output area regions are arranged substantially contiguously.

19. The machine tool according to claim 12 , wherein
the torque transmission region comprises a side wall,
the side wall extends spaced radially from the driving axis, and
the side wall comprises the at least two output area regions.

20. The machine tool according to claim 19 , wherein the side wall extends substantially radially closed around the driving axis.

21. The machine tool according to claim 12 , wherein a normal to one of the tangent planes is oriented in the radial direction away from the driving axis.

22. The machine tool according to claim 12 , wherein a normal to one of the tangent planes is oriented in the radial direction towards the driving axis.

23. The machine tool according to claim 12 , wherein
the angle α is enclosed between one of the tangent planes and the radial plane, wherein the radial plane is arranged vertically to the driving axis,
the angle α is smaller than 90 degrees, and
the angle α is larger than 0 degree.

24. The machine tool according to clai

Assignees

• Fein C & E Gmbh
• Bosch Gmbh Robert

Inventors

• Klabunde Olaf
• Blickle Juergen
• Thomaschewski Walter
• Bek Fabian
• Delfini Stefano
• Fellmann Willi
• Luescher Bruno
• Bozic Milan
• Mathys Thomas
• Grolimund Daniel

Classifications

• Y10T279/1071

  Lever · CPC title

• B27B19/006

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

• Y10T279/18

  Pivoted jaw · CPC title

• Y10T279/33

  Member applies axial force component · CPC title

• B24B23/04 Primary

  with oscillating grinding tools; Accessories therefor · CPC title