Rack-and-pinion steering apparatus

Details Rack-and-pinion steering apparatus Rack-and-pinion steering apparatus

2005-07-26

2008-10-28

Morris, Lesley D. (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C180S428000

Reexamination Certificate

active

07441626

ABSTRACT:
The present invention provides a rack-and-pinion steering apparatus capable of effectively reducing reverse input, while a high degree of design freedom is secured. The sum of the tilt angle of a rack tooth with respect to a reference line perpendicular to the axial line of a rack shaft and the tilt angle of a pinion tooth with respect to the axial line of a pinion shaft does not coincide with the tilt angle of the axial line of the pinion shaft with respect to the reference line. Crowning is given on the tooth surface of the rack tooth (or the pinion tooth) in order to decrease the tooth width on one end side in the direction of tooth trace and to increase the tooth width on the other end side according to the state of contact with the pinion tooth (or the rack tooth) opposed thereto.

REFERENCES:
patent: RE28740 (1976-03-01), Bishop
patent: 4116085 (1978-09-01), Bishop
patent: 4189955 (1980-02-01), Bishop
patent: 4382389 (1983-05-01), Namiki et al.
patent: 6390230 (2002-05-01), Shimizu et al.
patent: 6543569 (2003-04-01), Shimizu et al.
patent: 6-115440 (1994-04-01), None

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