Patent ID: 6179744
Filing Date: 2001-01-30
Classification: F16C,F16H,Y10S

Abstract:
A trunnion supporting structure of a continuously variable transmission, said transmission comprising an input disk and output disk arranged facing each other on a rotation axis, power rollers for transmitting a torque between said disks, trunnions supporting said power rollers, and a link connecting said trunnions, wherein a gyration angle of the power rollers is varied by driving the trunnions along a trunnion axis at right angles to said rotation axis, said supporting structure comprising:a spherical joint fitted to the trunnion,a needle bearing disposed between the trunnion and the spherical joint, said needle bearing comprising plural rolling parts which allow relative rotation between the trunnion and the spherical joint,a shoulder part formed in the trunnion, the shoulder part extending at right angles to the trunnion axis, anda member which is fitted to the trunnion and, in cooperation with the shoulder part, prevents the relative displacement of said needle bearing and the trunnion in a direction of said trunnion axis.