Wheel steering apparatus

Abstract

To provide a wheel steering apparatus capable of exhibiting a stabilized vehicle steerability without transmitting an external disturbance torque to a motor rotor even when the wheel receives an axially acting external force, this wheel steering apparatus includes a reciprocatingly movable rod 3 drivingly connected with a support member 2 for steerably supporting a wheel 1, and a ball screw mechanism 5 for reciprocatingly moving the rod 3 in response to rotation of a drive motor 4. In a rotational transmission system for transmitting rotation of the drive motor 4 to a nut member 5b of the ball screw mechanism 5, a clutch assembly 6 defining a reverse input limiting means is provided for preventing a rotar of the drive motor 4 from being rotated by the external force acting on the wheel 1. This clutch assembly 6 used is of a design wherein although rotation can be transmitted from an input shaft to an output shaft, no rotation is transmitted from the output shaft to the input shaft.

Dependencies are inferred from the claim text.