Rear wheel steering mechanism with locking control for four-whee

Details Rear wheel steering mechanism with locking control for four-whee Rear wheel steering mechanism with locking control for four-whee

1989-04-04

1992-03-17

Hill, Mitchell J.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

280 91, B62D 504

Patent

active

050960148

ABSTRACT:
A four-wheel-steering system includes a rear wheel steering mechanism for turning rear wheels in response to energization of an actuator. A locking device is responsive to de-energization of the actuator for locking gears and a rack shaft to prevent the rear wheels from being turned. The locking device includes a longer arm on which first and second gears are rotatably mounted, a shorter arm pivotally coupled to the longer arm, a stopper coupled to the shorter arm and engageable with the second gear, and a spring acting on the stopper for normally urging the stopper into engagement with the second gear, the actuator comprising an electric motor angularly movable with respect to the second gear.

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