Patent ID: 6325740
Filing Date: 2001-12-04
Classification: F16H

Abstract:
A toroidal continuously variable transmission, comprising:a rotary shaft;first and second disks respectively rotatably supported on the periphery of said rotary shaft, said first and second disks respectively having inner peripheral surfaces of said first and second disks which are disposed opposed to each other, said inner peripheral surfaces respectively having a cross section formed in an arc-shaped concave surface;a plurality of trunnions swingable about pivot shafts disposed at torsional positions with respect to the center axes of said first and second disks;a plurality of displacement shafts respectively disposed on said trunnions;a plurality of power rollers respectively held between said first and second disks while being rotatably supported on the peripheries of said displacement shafts, each of the peripheries of said power rollers being formed in a spherically-shaped convex surface;a loading nut threadedly fixed to a part of said rotary shaft; and,a metal elastic member having one side thereof supported by said loading nut to apply an elastic force in a direction where said first and second disks approach each other,wherein said loading nut has one end face opposed to said elastic member and includes a fastening deformable portion formed in the other end face thereof,the hardness of said one end face opposed to said elastic member is set at HRc45 or higher, andthe hardness of said fastening deformable portion is set at HRc30 or lower.