Electric rear wheel steering actuator

Details Electric rear wheel steering actuator Electric rear wheel steering actuator

1990-04-06

1992-02-11

Marmor, Charles A.

Motor vehicles

Compensating devices

280 91, B62D 504

Patent

active

050868616

ABSTRACT:
An apparatus for moving an object along a linear path, such as a tie rod end in a vehicle steering system, includes a generally tubular housing, an electric motor having a rotatable output shaft, a planetary gear set having an input attached to the output shaft and an output and a ball screw assembly having a rotatable nut attached to the planetary gear set output and a screw driven along a linear path of movement by the nut and adapted to be attached to an object to be moved, the output shaft, the planetary gear set and the ball screw assembly sharing a common longitudinal axis with the housing. The apparatus also includes a position sensor mounted on the housing for sensing the position of the screw along the path of movement and generating a sensor signal representing the position and a brake means attached to the output shaft whereby when the electric motor is actuated, the output shaft rotates the planetary gear set and the nut to move the screw along the path and when the screw reaches a predetermined position along the path, the brake is actuated to stop the rotation of the output shaft.

REFERENCES:
patent: 4653602 (1987-03-01), Anders et al.
patent: 4666014 (1987-05-01), Carlson et al.
patent: 4694925 (1987-09-01), Roberts
patent: 4705131 (1987-11-01), Shibahata et al.
patent: 4719981 (1988-01-01), Miyoshi
patent: 4842089 (1989-06-01), Kimbrough et al.
patent: 4895383 (1990-01-01), Abe et al.
patent: 4953650 (1990-09-01), Ohmura

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