Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

2007-01-09

2007-01-09

Winner, Tony (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

Reexamination Certificate

active

10866182

ABSTRACT:
An electric power steering apparatus comprises a rack shaft movable in the axial direction. The rack shaft is meshed with a pinion rotated in response to the operation of a steering member. The rotation of the output shaft in an electric motor is decelerated by first and second gears which are meshed with each other. A motion conversion mechanism for converting the rotation of the second gear into the axial movement of the rack shaft comprises a rotating cylinder rotated in synchronization with the second gear and a screw shaft. The screw shaft is integrally provided coaxially with the rack shaft and is screwed into the rotating cylinder through a rolling member. A screw groove in the screw shaft and the teeth in the first gear are twisted in the same direction.

REFERENCES:
patent: 6155376 (2000-12-01), Cheng
patent: 2002/0096389 (2002-07-01), Saruwatari et al.
patent: 2004/0168849 (2004-09-01), Honaga et al.
patent: 9-66844 (1997-03-01), None

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