Patent ID: 6572509
Filing Date: 2003-06-03
Classification: F16H

Abstract:
A toroidal-type continuously variable transmission, comprising:an input disk and an output disk disposed such that they are opposed to each other and are concentric with each other; a plurality of power rollers swingably interposed between said input and output disks; and, a hydraulic loading mechanism for pushing said input disk toward a side of said output disk to thereby transmit a rotation power of said input disk through said power rollers to said output disk, said hydraulic loading mechanism comprising: a hydraulic cylinder disposed on the side of a back surface of said input disk for defining a hydraulic chamber between said input disk and said hydraulic cylinder; an oil supply member for supplying oil into said hydraulic chamber to thereby push said input disk; a countersunk spring disposed in said hydraulic chamber and interposed between the back surface of said input disk and an inner surface of said hydraulic cylinder for elastically pushing said input disk toward the side of said output disk; and, an oil flow passage, when oil is supplied to an inside area of said countersunk spring disposed within said hydraulic chamber by said oil supply member, for allowing said oil in the inside area of said countersunk spring to flow smoothly into an outside area of said countersunk spring.