Ball cage for helical ballspline

Details Ball cage for helical ballspline Ball cage for helical ballspline

1988-07-26

1989-12-19

Herrmann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

744248B, 74459, 244 75R, 244213, 340672, 464 23, 464160, F16H 2522, B64C 1334, G08B 2100

Patent

active

048874795

ABSTRACT:
A ball cage for a helical ballspline of a mechanical movement device comprises a cage in the form of a tubular sleeve adapted to be arranged between a helically threaded inner member and a complimentary helically threaded outer member of the helical ballspline. The inner and outer members are displaceable relative to one another along a helical path formed by the threads thereof. The tubular sleeve of the ball cage includes a plurality of ball pockets formed therein for accommodating thrust transmitting balls of the ballspline arranged in the helical path. Two slots are formed in the ball cage for cooperation with respective pins fixed on the inner and outer members of the ballspline for axially and rotatably translating the ball cage with respect to both the inner and outer members during relative displacement of the inner and outer members for guiding the cage in a helical movement corresponding to a rolling movement imparted to the balls by relative displacement between the inner and outer members of the ballspline.

REFERENCES:
patent: 2690683 (1954-10-01), Schottler
patent: 2711655 (1955-06-01), Schottler
patent: 2739491 (1956-03-01), Russell
patent: 3935754 (1976-02-01), Comollo
patent: 3986689 (1976-10-01), Maltby
patent: 4688744 (1987-08-01), Aldrich
patent: 4730503 (1988-03-01), Rosenthal

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