Patent ID: 6572452
Filing Date: 2003-06-03
Classification: B24B,F16H

Abstract:
A method for working, to a desired configuration and feature by super finish working, an axial surface of a disc as an input disc or an output disc for a toroidal type continuously variable transmission which comprises an input disc having an outer peripheral surface defined by a cylindrical surface and an axial surface constituted by an input concave surface including an arcuate section, an output disc having an outer peripheral surface constituted by a cylindrical surface and at least one axial surface, which is opposed to said input concave surface and defined by an output concave surface including an arcuate section, a plurality of trunnions disposed at twisted positions with respect to said input and output discs between portions of said input and output discs and rockable between said portions, and a plurality of power rollers each having a convex peripheral surface defined by a rotating arc surface and pinched between said input concave surface and said output concave surface in a condition that said power rollers are rotatably supported by said trunnions, and in which torque is transmitted from said input disc to said output disc via said plurality of power rollers, wherein:by urging a shoe against a portion of circumference of said axial surface of said disc, said disc for the toroidal type continuously variable transmission is supported for rotation around its center axis, and said disc for the toroidal type continuously variable transmission is rotated in a condition that a super finish working grindstone is urged against a portion circumferentially deviated from said portion of the axial surface urged by said shoe.