Drive train used in a steering apparatus for rear wheels of a ve

Details Drive train used in a steering apparatus for rear wheels of a ve Drive train used in a steering apparatus for rear wheels of a ve

1993-10-28

1995-12-05

Rice, Kenneth R.

Motor vehicles

Compensating devices

180140, 180154, B62D 504

Patent

active

054720605

ABSTRACT:
A drive train of a steering apparatus for rear wheels of a vehicle transmits a driving force of a rotary motor to a steering shaft of rear wheels that is shiftable in the axial direction. The drive train comprises a reduction mechanism driven by the motor and a converting mechanism driven by the reduction mechanism for converting rotational motion of the motor to a linear motion for steering the rear wheels. The reduction mechanism includes a worm driven by the motor and a worm wheel driven by the worm. The converting mechanism comprises a trapezoidally-threaded screw mechanism including a trapezoidally-threaded female screw member and trapezoidally-threaded male screw member. One of the trapezoidally-threaded male and female screw members is driven by the worm wheel, and the other fixed to the steering shaft of rear wheels. A transmission efficiency of an input from the steering shaft of rear wheels to the trapezoidally-threaded screw mechanism is set to be zero. It is preferable to provide a backlash adjusting mechanism for adjusting a backlash of the trapezoidally-threaded screw mechanism.

REFERENCES:
patent: 4758012 (1988-07-01), Ogura et al.
patent: 4893688 (1990-01-01), Morishita
patent: 4987963 (1993-01-01), Oslapas et al.
patent: 5002142 (1991-03-01), Klosterhaus
patent: 5033566 (1991-07-01), Moretti et al.
patent: 5044454 (1991-09-01), Kanazawa et al.
patent: 5249638 (1993-10-01), Watanabe et al.
patent: 5265691 (1993-11-01), Konishi et al.
patent: 5314036 (1994-05-01), Kato et al.

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