VEHICLE POWER STEERING DEVICE

摘要

A motor-driven power steering device adapted to speed-reduce the rotation output from a driving source by a worm gear speed reducer and transmit it as an auxiliary steering torque to a steering shaft in such a manner as to supplement the steering force applied to a steering wheel, and adapted to steer the ground-engaging wheels is provided with a cooling means for circulating air within the gear chamber of the worm gear speed reducer to cool the gear chamber interior.