Rectilinear motion rolling guide unit

Details Rectilinear motion rolling guide unit Rectilinear motion rolling guide unit

1989-07-24

1990-02-20

Kashnikow, Andres

Bearings

Linear bearing

Recirculating

384 44, 384 45, F16C 3106

Patent

active

049021435

ABSTRACT:
A rectilinear motion rolling guide unit comprises: a long track rail having an I-shaped cross section; a casing having an inverse U-shaped cross section; and rolling elements interposed between the track rail and the casing. The casing rides over the track rail through a cavity portion having an inverse U-shaped cross section formed in the central lower portion of the casing. The corners of the upper and lower projecting portions on both sides of the rail are chamfered into inclined surfaces, thereby forming two upper and lower rail side track surfaces. Two upper and lower casing side track surfaces are formed on the inner peripheral surfaces of the cavity portion at the positions corresponding to the rail side track surfaces. The rolling elements are interposed between the opposite rail side and casing side track surfaces, respectively, thereby allowing the relative free slide motion to be executed between the track rail and the casing. Return passageways are formed in the casing. Two direction turning passageways for the rolling elements which roll on the casing side track surfaces are formed in the side plate. Two side plates are attached to both ends in the longitudinal direction of the casing. The casing side track surfaces and the return passageways are coupled, thereby forming two endless rolling element circulating passageways which perpendicularly cross into the casing. Lengths of load track surfaces of the circulating passageways are equal. Balls roll on one of the load track surfaces and the rollers which are arranged in parallel roll on the other load track surface.

REFERENCES:
patent: 4563045 (1986-01-01), Katayama
patent: 4582369 (1986-04-01), Itoh
patent: 4799805 (1989-01-01), Tanaka

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