Power assist device for steering apparatus

Details Power assist device for steering apparatus Power assist device for steering apparatus

1998-10-14

2000-02-29

Hurley, Kevin

Motor vehicles

Steering gear

With electric power assist

B62D 504

Patent

active

060297689

ABSTRACT:
In a power assist device 5, a hollow type electric motor 6 and a hollow-type wave drive gear 7 are concentrically arranged, and a steering shaft 2 is inserted into the center of these component parts. The rotational output of the hollow output shaft 61 of the electric motor 6 is input to a wave generator 74, and a rotational output of reduced speed is derived from a cup-shaped flexible external gear 73. This rotational output is transferred as a force assisting the steering shaft 2 in steering operation. The power assist device 5 employs a small, compact wave gear drive and has the motor 6 and the wave drive gear 7 each of hollow type adaptable to be concentrically mounted on the outer periphery of the steering shaft 2. Therefore a small, compact power assist device can be configured, substantially reducing the installation space.

REFERENCES:
patent: 5850765 (1998-12-01), Shirasawa
patent: 5931054 (1999-08-01), Shirokoshi et al.

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