Electric steering apparatus

Details Electric steering apparatus Electric steering apparatus

1989-10-24

1990-11-06

Braun, Leslie A.

Machine element or mechanism

Control lever and linkage systems

Hand operated

74409, 74441, 74495, 280775, B62D 118

Patent

active

049676180

ABSTRACT:
An electric steering apparatus which effects position adjustment by electric drive has a screw shaft parallel to upper and lower columns. A nut member rotatably supported by a housing fixed to a bracket is fixed against movement in the axial direction of the screw shaft and threadably engaged with a screw portion provided at one end of the screw shaft. In a preferred embodiment the other end of the screw shaft is pivotally connected to the upper column for pivotal movement relative to the bracket in the direction of tilt. The nut member is self-aligning in the housing, and the nut member is rotatively driven by an electric motor to move the screw shaft in the axial direction and thereby move the upper column, whereby position adjustment can be accomplished. The apparatus is provided with a back-lash preventing device in which the screw shaft is pressed against the nut member in a radial direction and the threadably engaged portions of the screw shaft and the nut member are urged against each other.

REFERENCES:
patent: 4503504 (1985-03-01), Suzumura et al.
patent: 4528862 (1985-07-01), Goldowsky
patent: 4602520 (1986-07-01), Nishikawa et al.
patent: 4633732 (1987-01-01), Nishikawa et al.
patent: 4669325 (1987-06-01), Nishikawa et al.
patent: 4691587 (1987-09-01), Farrand et al.
patent: 4739673 (1988-04-01), Ishikawa et al.
patent: 4753122 (1988-06-01), Nishikawa et al.
"How to Provide for Backlash in Threaded Parts", Bower, Mechanisms, Linkages, and Mechanical Controls, 1965, pp. 188-189.

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