Power assistance means for a steering gear and a steering gear a

Details Power assistance means for a steering gear and a steering gear a Power assistance means for a steering gear and a steering gear a

1987-11-12

1989-06-13

Herrmann, Allan D.

Machine element or mechanism

Gearing

Follow-up mechanism

74422, 180142, 180148, B62D 504

Patent

active

048381063

ABSTRACT:
Power assistance mechanism for a rack and pinion steering gear assembly and an assembly which includes such mechanism includes a main rack and pinion steering gear 1 mounted on which is an auxiliary rack and pinion unit 9. The unit 9 includes an auxiliary rack bar 11, the rack of which engages with an auxiliary pinion in an auxiliary housing 10. The auxiliary pinion is rotatable by an electric motor 23 in the housing 10 to drive the auxiliary rack bar 11. The housing 10 is bolted through brackets 14 to the housing 2a of the main gear 1 while the auxiliary rack bar is coupled through a bracket 16 to the rack bar of the main gear 1. The electric motor 23 is controlled by a switch 27 in the steering input 7 to the pinion of the main steering gear 1 so that when the main rack bar is driven by rotation of the main pinion, the switch 27 is actuated to energize the electric motor and drive the auxiliary rack bar 11 in a sense appropriate to assist the displacement of the main rack bar.

REFERENCES:
patent: 3426863 (1969-02-01), Hanson
patent: 3944015 (1976-03-01), Bishop
patent: 4214642 (1980-07-01), Dauvergne
patent: 4408673 (1983-10-01), Leiber
patent: 4580651 (1986-04-01), Adams
patent: 4681183 (1987-07-01), Oshita
patent: 4708220 (1987-11-01), Noto et al.
patent: 4742882 (1988-05-01), Shimizu et al.

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