Motor vehicles – Compensating devices
Patent
1994-12-07
1996-01-09
Hurley, Kevin T.
Motor vehicles
Compensating devices
464 45, 464 35, B62D 504
Patent
active
054821282
ABSTRACT:
A lock nut having a tapered portion at one end thereof is screwed halfway through an output shaft that transfers motion to a steering mechanism. A tapered fitting hole formed through an axis of a worm wheel is fitted onto an outer circumference of the tapered portion with a slip plate interposed therebetween. By tightening the lock nut, the worm wheel is pressed and fixed to a support portion formed on a portion of the output shaft, and a worm directly connected to an output side of a steering assisting electric motor is made to engage with a gear formed on the outer circumference of the worm wheel. In normal operation, the torque of the electric motor is transmitted to the worm wheel via the worm, and further on to the output shaft via friction on the slip plate. Upon application of an excessive rotational torque in the event of a motor lock, slippage occurs on the slip plate to allow free rotation of the output shaft.
REFERENCES:
patent: 3203268 (1965-08-01), Manone et al.
patent: 4880407 (1989-11-01), Carton-Bacon
patent: 4910443 (1990-03-01), Zylstra et al.
patent: 5016740 (1991-05-01), Ito et al.
patent: 5213173 (1993-05-01), Konishi et al.
Takaoka Manabu
Watanabe Masayuki
Hurley Kevin T.
Koyo Seiko Co. Ltd.
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