Power assist apparatus for motor vehicle steering

Details Power assist apparatus for motor vehicle steering Power assist apparatus for motor vehicle steering

1997-02-20

2000-06-20

Boehler, Anne Marie

Motor vehicles

Steering gear

With electric power assist

74396, B62D 504

Patent

active

06076628&

ABSTRACT:
A power assist apparatus for a motor vehicle steering shaft including a speed reducer housing mounted on a steering column, an electric motor on the speed reducer housing, and a speed reducer consisting of a worm gear and a worm wheel. The worm gear is supported on the speed reducer housing for rotation with an output shaft of the electric motor. The worm wheel is rigidly connected to the steering shaft. The steering shaft is rotatably mounted on a bearing carrier having a cylindrical pilot which cooperates with a cylindrical journal on the speed reducer housing in rotatably supporting the bearing carrier on the speed reducer housing. The cylindrical pilot is eccentric relative to a longitudinal centerline of the steering shaft so that the steering shaft and the worm wheel traverse a circular orbit in the plane of the worm wheel when the bearing carrier rotates relative to the speed reducer housing. The circular orbit of the worm wheel has a component perpendicular to the worm gear to eliminate lash therebetween. The position of the bearing carrier relative to the speed reducer housing is captured by a ring clamped to the speed reducer housing over the bearing carrier.

REFERENCES:
patent: 1948487 (1934-02-01), Berry
patent: 2335606 (1943-11-01), Pelphrey
patent: 2553795 (1951-05-01), Staude
patent: 2754465 (1956-07-01), Brier
patent: 3191109 (1965-06-01), Hepner
patent: 3753375 (1973-08-01), Colletti
patent: 5445237 (1995-08-01), Eda et al.
patent: 5482128 (1996-01-01), Takaoka et al.

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