Retainer for ball screw crossover tube

Details Retainer for ball screw crossover tube Retainer for ball screw crossover tube

1996-12-13

1999-01-05

Marmor, Charles A.

Machine element or mechanism

Gearing

Teeth

74499, F16H 5517

Patent

active

058551425

ABSTRACT:
A retainer for a crossover tube of a ball screw between a rack piston and a worm shaft of a motor vehicle power steering gear. The ball screw includes a helical passage between the rack piston and the worm shaft, a U-shaped crossover tube on the rack piston, and a plurality of bearing balls which roll in a ball circuit defined by the helical passage and the crossover tube. The crossover tube retainer is a molded plastic arch straddling a linear segment of the crossover tube having a web bridging the gap between the crossover tube and the rack piston bore. The thrust of the bearing balls urging dislodgment of the crossover tube from the rack piston is reacted against the rack piston bore through the web of the molded plastic arch across a bearing surface of the web having a contour complementary to the contour of the rack piston bore above the molded plastic arch. A pair of side walls of the molded plastic arch flare laterally outward in opposite directions from a throat of the molded plastic arch so that the retainer is compatible with ball screws having different helical lead angles.

REFERENCES:
patent: 2380662 (1945-07-01), Means, Jr.
patent: 2917938 (1959-12-01), Folkerts
patent: 3022772 (1962-02-01), Zeigler et al.
patent: 3176535 (1965-04-01), Rowland
patent: 3206995 (1965-09-01), Bohnhoff
patent: 3327551 (1967-06-01), Prueter
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patent: 4235122 (1980-11-01), Walter
patent: 4342235 (1982-08-01), Benton
patent: 4750378 (1988-06-01), Sheppard
patent: 5211069 (1993-05-01), Wada et al.
patent: 5303607 (1994-04-01), Katahira
patent: 5341701 (1994-08-01), Krom et al.

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