Recirculating-ball linear bearing and guide rail therefor

Details Recirculating-ball linear bearing and guide rail therefor Recirculating-ball linear bearing and guide rail therefor

1983-02-10

1987-09-08

Levy, Stuart S.

Bearings

Linear bearing

Recirculating

384 49, F16C 2900, F16C 2906

Patent

active

046920390

ABSTRACT:
A combination of a guide rail and a linear bearing mounted astraddle thereon for linear rolling movement. The guide rail is of T-shaped cross section, having a head on both sides of which there are formed two pairs of parallel ball raceways of arcuate cross section, with each pair of raceways vertically spaced and angled away from each other. The linear bearing includes a body of inverted-U-shaped cross section having two pairs of ball raceways of arcuate cross section formed on its inner surfaces in opposed relation to the two pairs of raceways on the guide rail. A ball return passageway extends longitudinally through the bearing body in the adjacency of each raceway thereon. Fastened to the opposite ends of the bearing body, a pair of segmented end covers have hairpin grooves formed in their inside surfaces, each hairpin groove intercommunicating one raceway on the bearing body and one adjacent return passageway therein to allow recirculation of a group of antifriction balls. A pair of cages extend along the respective pairs of raceways on the bearing body for rollably holding the antifriction balls thereon. The cages are slotted to permit the balls to project therethrough for rolling engagement with the raceways on the guide rail.

REFERENCES:
patent: 2992620 (1961-07-01), Cherkas
patent: 4253709 (1981-03-01), Teramachi
patent: 4273389 (1981-06-01), Takai
patent: 4296974 (1981-10-01), Teramachi

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