Electric power steering device

Details Electric power steering device Electric power steering device

1997-01-23

1998-10-13

Young, Lee W.

Motor vehicles

Steering gear

With electric power assist

192 37, 74388PSA, 74412TA, B62D 504

Patent

active

058198717

ABSTRACT:
A torque is transmitted from a steering assistance motor to a steering shaft via a gear. The first rotation restraining element, which is radially deformed by being sandwiched between the outer circumference of the steering shaft and the inner circumference of the gear, exerts a radial force corresponding to the radial deformation on the steering shaft and the gear, to generate a torque based on friction for restraining the relative rotation between the shaft and gear. The restraining torque generated based on the deformation of the first rotation restraining element is smaller than the breaking torque of the second rotation restraining element, which is fitted to the steering shaft and the gear via clearances so as to restrain the relative rotation between the shaft and gear.

REFERENCES:
patent: 4726437 (1988-02-01), Norton
patent: 5016740 (1991-05-01), Ito et al.
patent: 5213173 (1993-05-01), Konishi et al.
patent: 5482128 (1996-01-01), Takaoka et al.

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