Patent ID: 6158558
Filing Date: 2000-12-12
Classification: F16D

Abstract:
An electromechanically operated disc brake for motor vehicles with a brake disc and a brake caliper, with an actuating unit provided on the brake caliper and with two friction linings, each of which acts together with one side of a brake disc respectively and which are arranged in the brake caliper in such a way that a limited displacement is possible, wherein one of the friction linings is brought into engagement directly with the brake disc by means of an actuating element through the actuating unit and the other friction lining is brought into engagement with the brake disc through the effect of a reaction force generated by the brake caliper, and wherein the actuating unit exhibits an electric motor with a rotor, arranged coaxially to the actuating element as well as a reducing gear arranged between said electric motor and the actuating element, as well as means which prevent reverse rotation of the rotor of the electric motor when the current supplied to the electric motor is switched off after the electric motor was activated, wherein the means are made up of an electric magnet whose armature is coupled to the rotor in a rotationally and longitudinally displaceable manner.