	US 11,717,935 B2
	Quick-clamping device for a portable machine tool
Bruno Luescher, Zofingen (CH); Andreas Zurbruegg, Luterbach (CH); Bruno Sinzig, Oberbipp (CH); and Marcus Schuller, Dettenhausen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 16/620,816
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Jul. 5, 2018, PCT No. PCT/EP2018/068217 § 371(c)(1), (2) Date Dec. 9, 2019, PCT Pub. No. WO2019/015980, PCT Pub. Date Jan. 24, 2019.
Claims priority of application No. 10 2017 212 526.8 (DE), filed on Jul. 20, 2017.
Prior Publication US 2020/0094373 A1, Mar. 26, 2020
Int. Cl. B24B 45/00 (2006.01); B24B 23/02 (2006.01)

CPC B24B 45/006 (2013.01) [B24B 23/028 (2013.01)]

15 Claims

1. A quick-change clamping device for a portable power tool, comprising:

at least one clamping unit having at least one clamping element mounted movably with respect to a movement axis of the clamping unit such that the clamping unit is configured to fix an insert tool unit to an output shaft of the portable power tool without the use of any tools; and

at least one control unit having at least one movably mounted control element configured to actuate the clamping unit, the control element mounted in at least a translational manner and configured to bring the clamping unit from a clamping position into a release position in dependence on a movement of the control element,

wherein the control element is configured as a pushbutton and has a movement axis that runs at least substantially parallel to the movement axis of the clamping unit, and

wherein the at least one clamping unit includes an arcuate coulisse element in which a securing unit is arranged, the securing unit being operably connected to the control element such that movement of the pushbutton along the movement axis causes movement of the securing unit along the movement axis within the coulisse element, pivoting the coulisse element about a pivot axis so as to move the at least one clamping element from the clamping position to the release position.