Actuator for steering the rear wheels in front and rear wheel st

Details Actuator for steering the rear wheels in front and rear wheel st Actuator for steering the rear wheels in front and rear wheel st

1986-01-24

1988-08-30

Love, John J.

Land vehicles

Wheeled

Running gear

180140, B62D 900

Patent

active

047671297

ABSTRACT:
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 is 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.

REFERENCES:
patent: 4105086 (1978-08-01), Ishii et al.
patent: 4566710 (1986-01-01), Furakawa et al.
J. E. Shingley, Mechanical Engineering Design, McGraw Hill Book Co., N.Y., 1963.
D. W. Dudley, Gear Handbook, McGraw Hill Book Co., N.Y., 1962.

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