	US 12,017,324 B2
	Quick clamping device for a portable machine tool, in particular an angle grinder, comprising at least one output shaft that can be rotatably driven
Andreas Zurbruegg, Lohn-Ammansegg (CH)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 16/341,295
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Oct. 4, 2017, PCT No. PCT/EP2017/075114 § 371(c)(1), (2) Date Apr. 11, 2019, PCT Pub. No. WO2018/072997, PCT Pub. Date Apr. 26, 2018.
Claims priority of application No. 10 2016 220 367.3 (DE), filed on Oct. 18, 2016.
Prior Publication US 2021/0276146 A1, Sep. 9, 2021
Int. Cl. B24B 45/00 (2006.01); B24B 23/02 (2006.01)

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

17 Claims

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

a housing;

at least one output shaft configured to be driven in rotation;

at least one clamping unit including at least one movably mounted clamping element located at least partially outside of the housing and configured to exert a clamping force on an insert tool unit in a clamping position of the at least one movably mounted clamping element, the at least one clamping unit configured for fixing the insert tool unit to the at least one output shaft without use of tools;

at least one operator control unit configured to move the at least one movably mounted clamping element into the clamping position and/or to move the at least one movably mounted clamping element into a release position of the at least one movably mounted clamping element; and

at least one securing unit configured to prevent movement of the at least one movably mounted clamping element from the clamping position into the release position of the at least one movably mounted clamping element at least when the at least one movably mounted clamping element is acted on by a first force which is decoupled from the at least one operator control unit and which acts in a first direction toward the release position of the at least one movably mounted clamping element,

wherein, in the release position, the insert tool unit is configured to be removed from the at least one clamping unit and/or from the at least one output shaft, and

wherein the at least one movably mounted clamping element has a pivot axis that runs at least substantially perpendicular to an axis of rotation of the output shaft.