US 11,673,218 B2
Safety braking device
Daniel Dennis, Nuertingen (DE); and Florian Esenwein, Leinfelden-Echterdingen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/275,714
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Sep. 20, 2019, PCT No. PCT/EP2019/075279
§ 371(c)(1), (2) Date Mar. 12, 2021,
PCT Pub. No. WO2020/064524, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 10 2018 216 573.4 (DE), filed on Sep. 27, 2018.
Prior Publication US 2022/0055166 A1, Feb. 24, 2022
Int. Cl. B60K 6/26 (2007.10); B23Q 11/00 (2006.01); F16D 63/00 (2006.01); F16D 67/02 (2006.01); B27B 5/38 (2006.01); F16D 11/10 (2006.01)
CPC B23Q 11/0092 (2013.01) [F16D 63/006 (2013.01); F16D 67/02 (2013.01); B27B 5/38 (2013.01); F16D 11/10 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A safety brake device for a power tool for braking a machining tool driven by means of a drive unit via an output unit including an output shaft, comprising:
a decoupling device, configured to decouple the output unit from the drive unit during a braking operation thereby reducing at least one of a rotational mass and rotational energy to be braked of the output unit; and
at least one brake device comprising at least one first brake device part and one second brake device part, wherein the first brake device part is arranged on the output shaft of the output unit so as to allow essentially no relative rotation, and wherein the second brake device part is configured to allow essentially no relative rotation with respect to the power tool, and the first brake device part and the second brake device part are configured to interact mechanically with one another during a braking operation and in such a way to stop rotation of the output unit,
wherein the first brake device part of the brake device is embodied in one piece with the decoupling device, and
wherein the first brake device part and the second brake device part each includes a plurality of toothing elements, and the at least one brake device is configured such that, during the braking operation, the first brake device part is moved axially along the output shaft in a direction toward the second brake device part so as to couple the first and second brake device parts in such a way that the plurality of toothing elements of the first brake device part interlock with the plurality of toothing elements of the second brake device part in a form fit.