Electro mechanical actuator

摘要

An electro-mechanical linear actuator particularly attractive for vehicle steering applications includes a case having a cover part rigidly attached to a housing part and an output rod supported on the case for linear shiftable movement along a primary axis of the case. An electric motor is mounted on the housing part of the case with a shaft of the motor supporting in cantilever fashion a pinion in a gear chamber of the case between the housing and cover parts. A drive gear is disposed in the gear chamber around output rod and meshes with the pinion. A tubular hub surrounds the output rod and is rigidly attached to the drive gear. A pair of taper roller bearings mount the tubular hub in cantilever fashion on the housing part for rotation about the primary axis. A ball screw assembly between the tubular hub and the output rod moves the rod linearly when the hub rotates.