Patent ID: 9611908
Date: 2017-04-04
CPC Classifications: F16D

Claim:
1. An electromechanical disc brake device including a piston unit which is configured to move friction pads in a direction of a disc, the electromechanical disc brake comprising: an external shaft configured to rotate within the piston unit and to move the piston unit in the direction of the disc or in the opposite direction of the disc, the external shaft having a plurality of first friction members along an inner surface of the external shaft; and an internal shaft connected to a motor to rotate when the motor is driven and located within the external shaft, the internal shaft having a plurality of second friction members arranged between the first friction members along an outer circumferential surface of the internal shaft and contacting two adjacent first friction members, wherein each of the first friction members is disposed on an end of an elastic member, which is located in a mounting groove formed along the inner surface of the external shaft, and is in contact with the outer circumferential surface of the internal shaft.