Patent ID: 9217479
Filing Date: 2015-12-22
Classification: F16D

Abstract:
1. An electric brake system comprising: a rotary shaft driven by an electric motor; a linear motion mechanism, including a linear motion member, for converting a rotary motion of the rotary shaft to a linear motion of the linear motion member; a caliper body formed with a receiving hole in which the linear motion member is axially slidably received; a friction pad arranged at an axial front end of the linear motion member and configured to be pressed against a brake disk by the linear motion member; a reaction force receiving member provided axially rearwardly of the linear motion member for receiving an axially rearward reaction force applied to the linear motion member when the friction pad is pressed by the linear motion member; a displacement sensor for detecting a pressing force to the friction pad by measuring a displacement of the reaction force receiving member; and a snap ring fitted in a circumferential groove formed in an inner wall of the receiving hole at a portion of the inner wall located axially rearwardly of an area of the inner wall where the linear motion member slides, the snap ring restraining axially rearward movement of the reaction force receiving member.