Ball nut and screw assemblies with improved crossovers

Machine element or mechanism – Gearing – Teeth

Patent

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Details

744248R, F16H 2522

Patent

active

056220820

ABSTRACT:
A crossover button, in combination with a ball nut and screw assembly, has a generally Z-shaped body with a section received within a radial bore in the nut. The body has an axially diagonal, raceway turn bridging, ball crossover recirculation passage in its radially inner face which separates portions of a pair of adjacent raceway turns into ball path portions and non-ball path portions external to the ball path portions. The passage has entrances for different turns communicating with the ball path portions. Incorporated with the body are a pair of oppositely helically extending, integrated, normally non-load bearing legs, projecting laterally in a direction away from the passage entrances adjacent opposite ends of the passage in generally parallel lateral planes, which are received in the adjacent non-ball path portions of both the complemental nut and screw helicoidal grooves out of the path of the train of load bearing balls to function to prevent free-wheeling in the event of ball train failure.

REFERENCES:
patent: 2618166 (1952-11-01), Douglas
patent: 2995948 (1961-08-01), Galonska et al.
patent: 3512426 (1970-05-01), Dabringhaus
patent: 3580098 (1971-05-01), Goad
patent: 3815435 (1974-06-01), Eschenbacher et al.
patent: 3961541 (1976-06-01), Fund et al.
patent: 4148226 (1979-04-01), Benton
patent: 4272476 (1981-06-01), Wright et al.
patent: 4905534 (1990-03-01), Andonegui
patent: 5121647 (1992-06-01), Teramachi
patent: 5193409 (1993-03-01), Babinski

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