IMPROVEMENTS IN ELECTRIC ACTUATORS FOR VEHICLE POWERED STEERING SYSTEMS

摘要

An electric actuator is disclosed for use in a vehicle power steering system which comprises an electric motor (20) and a gearbox (22). The electric motor (20) comprises a stator (26) and an armature (27) concentric with the stator (26) and adapted to rotate about a common axis, and a single common output shaft (40) is provided which extends through the actuator (14) to transmit torque from the motor (20) to a drive portion (70) of the output shaft (40) remote from the gearbox (22), from whence torque is transmitted to the gearbox (22) through a transmission portion (60) of the shaft (40). A clutch (21) may also be provided between the motor (20) and the output shaft (40).