Patent ID: 6071210
Filing Date: 2000-06-06
Classification: F16H

Abstract:
A ball spline for use in a troidal-type continuously variable transmission, comprising:a plurality of spline grooves respectively formed in an outer peripheral surface of an input shaft and in an inner wall surface of a mounting hole opened up in a central portion of an input disc in such a manner that they extend along a direction of said input shaft and are opposed to each other, thereby forming spline gaps by two mutually opposing spline grooves respectively formed in the outer peripheral surface of the input shaft and in the inner wall surface of the mounting hole of said spline grooves; anda plurality of balls arranged in series within said spline gaps, wherein, while allowing a movement of said input disc in the direction of said input shaft by means of contact between said spline gaps and said balls, said input shaft and said input disc are drivingly connected to each other,wherein the number of said spline gaps is set different from integral multiples of the number of power rollers which are held by and between said input disc and an output disc in contact with said two discs in order to transmit a rotation torque between said input and output discs.