Actuator for steering the rear wheels in front and rear...

Details Actuator for steering the rear wheels in front and rear... Actuator for steering the rear wheels in front and rear...

B - Operations, Transporting

62

D

180/34

B62D 7/00 (2006.01) B62D 7/15 (2006.01)

Patent

CA 1266620

- 19 - ABSTRACT OF THE DISCLOSURE Disclosed is an actuator for steering the rear wheels in front and rear wheel steering device for vehicle in which the external forces, such as the self aligning torque of the rear wheels and irregularities of the road surface, which may be applied to the rear wheels are prevented from being transmitted to the actuator for controlling the steering angle of the rear wheels. Thereby, the steering angle of the rear wheels are determined solely by the control action of the front and rear wheel steering device and the motion of the vehicle is not affected by external forces. As a result, the vehicle motion is stabilized. When the force for steering the front wheels are transmitted to the rear wheels to steer them, elimination of the reaction from the road to the actuator prevents undesirable variation in the force required to steer the vehicle or the force required to hold a steering angle. Elimination of reaction to the actuator can be accomplished by worm gears, screw threads and so on in which the lead angle is smaller than the friction angle.

500374

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