Linear bearing for continuous longitudinal movement

F - Mech Eng,Light,Heat,Weapons – 16 – C

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F16C 29/06 (2006.01)

Patent

CA 1278601

ABSTRACT OF THE DISCLOSURE A linear bearing for continuous longitudinal movement in which friction due to changes in the direction of rotation of the rollers is eliminated or substantially reduced. The linear bearing comprises a housing which defines at least one closed roller orbit having an inner surface and an outer surface for accommodating a plurality of rollers. Each roller orbit also comprises a load zone and a return travel zone, which are interconnected at both ends by reversal regions. The load zone is partly defined by a raceway located in the housing adjacent to the load zone for applying a load to the rollers, the raceway forming part of the outer surface of each roller orbit. Respective section planes of the rollers in the load zone and the rollers in the return travel zone intersect along an axis which extends parallel to the load zone, and advantageously define an angle of about 15° to 60°, or more preferably about 40° to 50°. Each of the reversal regions includes a transitional region that is approximately helically curved, and a two-dimensionally curved region in which the axes of rotation of the rollers are substantially parallel to the axes of rotation of the rollers in the return travel zone.

519540

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