Ball screw and wheel steering device having the same

Details Ball screw and wheel steering device having the same Ball screw and wheel steering device having the same

2006-01-31

2006-01-31

Boehler, Anne Marie (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C074S499000

Reexamination Certificate

active

06991062

ABSTRACT:
A ball screw mechanism comprises a screw shaft, a nut and balls. The nut has a cylindrical portion in the axial middle on the outer peripheral surface thereof that becomes a fitting surface for fitting in a sleeve, and small diameter step portions in the opposite axial sides on the outer peripheral surface thereof that become non-fitting surfaces not fitting in the sleeve. A portion of a wheel steering shaft is provided with the screw shaft, and a plurality of balls are disposed in a rolling way defined between a thread groove formed in the outer periphery of the screw shaft and a thread groove formed in the inner periphery of the nut.

REFERENCES:
patent: 5590732 (1997-01-01), Sugino et al.
patent: 5738181 (1998-04-01), Kato
patent: 6112610 (2000-09-01), Welling
patent: 6186268 (2001-02-01), Onodera et al.
patent: 6378646 (2002-04-01), Bugosh
patent: 6464034 (2002-10-01), Toda et al.
patent: 08-133098 (1996-05-01), None
patent: 11-082666 (1999-03-01), None
patent: 2000-296780 (2000-10-01), None
patent: 2000-326857 (2000-11-01), None

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