Patent ID: 6375593
Filing Date: 2002-04-23
Classification: F16C,F16H

Abstract:
A power roller bearing for use in a toroidal type continuously variable transmission system in which a power roller supported by a power roller bearing is interposed between an input disk and an output disk in a rotatable and inclinable manner, said power roller bearing comprising:an inner race with said power roller mounted thereon, said power roller having a traction portion to be contacted with said input and output disks in such a manner the rotation of said input disk is transmitted to said output disk through a rotational movement of said power roller; an outer race disposed opposite to said inner race for supporting said power roller rotatably; and, a rolling element interposed between said inner and outer races in such a manner that it is held between ring-shaped race grooves respectively formed on the mutually opposing surfaces of said inner and outer races, wherein each of said race grooves respectively formed on said inner and outer races has an arc-shaped cross section, and the radii of curvatures of the arc-shaped cross sections of said race grooves are set in the range of 52% to 59% of the diameter of said rolling element.