Ball bearing for lengthwise movement

Details Ball bearing for lengthwise movement Ball bearing for lengthwise movement

1986-04-02

1988-01-05

Levy, Stuart S.

Bearings

Linear bearing

Recirculating

384 45, F16C 2906

Patent

active

047172649

ABSTRACT:
A ball bearing for lengthwise movement has a cage sleeve between a shaft and a housing. The cage sleeve has a plurality of circumferentially distributed channels in which a corresponding row of circulating balls is arranged. The balls loaded by the shaft travel in one linear raceway and return unloaded in another linear raceway, the ends of the linear raceways being connected by a pair of reversing raceways. A load-transmitting raceway rail is seated in each of a plurality of openings in the cage sleeve. Each raceway rail has a raceway groove formed by an inner shoulder and an outer shoulder which overlies the linear raceway for loaded balls, a surface portion which overlies the linear raceway for unloaded balls, and a pair of end surfaces which overlie the respective reversing raceways. These end surfaces are substantially parallel to a hypothetical half-circle defined by the path of a center point of a ball during travel in the corresponding reversing raceway and are substantially tangent to a hypothetical extension of the raceway groove such that smooth rolling of a circulating ball is enabled during transitions between the linear raceway for loaded balls and the reversing raceways.

REFERENCES:
patent: 3844629 (1974-10-01), Haines
patent: 4553796 (1985-11-01), Walter et al.
patent: 4572591 (1986-02-01), Walter et al.

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