Patent ID: 9624994
Date: 2017-04-18
CPC Classifications: B60T,F16D,F16H

Claim:
1. An electric linear motion actuator comprising: an electric motor having a rotor shaft; a reduction gear mechanism configured to reduce the speed of, and output, rotation of the rotor shaft of the electric motor; a slide member capable of axially moving along a center axis of an output gear in the reduction gear mechanism; and a rotation-linear motion converting mechanism configured to convert a rotary motion of the output gear to a linear motion and transmit the linear motion to the slide member; and a locking mechanism capable of locking and unlocking the rotation of the rotor shaft of the electric motor, wherein the locking mechanism comprises: wherein the plunger and the locking pin are formed as separate parts, the plunger and the locking pin are disposed coaxial with each other such that an end surface of the plunger and an end surface of the locking pin axially face each other, and the end surface of the plunger and the end surface of the locking pin are shaped and disposed such that the plunger and the locking pin are brought into abutment with each other only at the end surface of the plunger and the end surface of the locking pin, wherein the locking pin is made of a non-magnetic material, and wherein a return spring is provided to apply an elastic force to the locking pin, thereby allowing the plunger to move backward along with the locking pin.