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1. (WO2017152928) A BRAKE FOR AN ACTUATOR OF AN INDUSTRIAL ROBOT

Pub. No.:    WO/2017/152928    International Application No.:    PCT/EP2016/054745
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Mar 08 00:59:59 CET 2016
IPC: F16D 63/00
B60T 1/00
B25J 19/00
Applicants: ABB SCHWEIZ AG
Inventors: TRANGÄRD, Arne
Title: A BRAKE FOR AN ACTUATOR OF AN INDUSTRIAL ROBOT
Abstract:
A brake (10) for an actuator (150) of an industrial robot (110) comprises a first element (20) with a plurality of legs (30) arranged at regular intervals, and a second element (90)configured to get in between a pair of legs (30) to engage the brake (10) and to thereby oppose a relative movement between the first and the second elements (20, 90), the second element (90) further being configured to get out from between the pair of legs (30) to release the brake (10) and to thereby allow a free relative movement between the first and the second elements (20, 90). The legs (30) are configured to bend aside such that the second element (90) comes in between an adjacent pair of legs (30) if braking energy needed to stop the relative movement between the first and the second elements (20, 90) exceeds a threshold value. The braking effect is dominantly based on deformation (internal friction) of the first element (20) instead of friction between the first and second elements (20, 90), and therefore a contaminant like oil does not have a strong influence on the braking effect.