Patent ID: 9228648
Filing Date: 2016-01-05
CPC Classification: F16D,F16H

Claim Text:
1. An electric linear motion actuator comprising: a rotary shaft configured to be driven by an electric motor; a linear motion device which converts a rotation of the rotary shaft to a linear motion of a linear motion member such that the linear motion member is pressed against an object in an axially forward direction; a load sensor for detecting a magnitude of a load with which the linear motion member is pressed against the object; a temperature compensator for compensating for an influence of temperature on the load sensor; and a clearance controller for adjusting a clearance between the linear motion member and the object to a predetermined value by controlling the electric motor when pressure on the object from the linear motion member is released, wherein the clearance controller is configured to calculate a target rotational angle from a position of the electric motor corresponding to the magnitude of the load detected by the load sensor to a position of the electric motor where the clearance is at the predetermined value, and control the electric motor to rotate the electric motor by the target rotational angle, wherein the load sensor is located axially rearward of the linear motion device so as to axially support the linear motion device through a thrust bearing.