| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel steering device which can have stable vehicle steering ability without transmitting disturbance torque to a motor rotor even when an axial external force is exerted on a wheel. SOLUTION: The wheel steering device is provided with a movable forward and backward rod 3 coupled to a support member 2 to freely steer a wheel 1, and a ball screw 5 to move forward and backward the rod 3 through rotation of a motor 4. A rotation transmission system to transmit rotation to a nut 5b of the ball screw 5 from the motor 4 is provided with a clutch 6 forming a reverse input limiting means. The clutch 6 prevents rotation of the rotor of a motor 1 by an external force exerted on the wheel 1. The clutch 6 employs a means to transmit rotation to an output shaft from an input shaft but cuts off transmission of rotation from the output shaft to the input shaft side. |
