Patent ID: 6152849
Filing Date: 2000-11-28
Classification: F16H,Y10T

Abstract:
A friction roller type continuously variable transmission comprising:input and output discs arranged on a common axis;friction rollers each being operatively interposed between said input and output discs to transmit torque therebetween;supporting members each rotatably supporting the friction roller and having a shaft extending therefrom;servo-pistons each including a hollow boss portion which has the shaft of a corresponding supporting member slidably received therein, said hollow boss portion being capable of pushing the corresponding supporting member to pivot the corresponding friction roller to continuously change a speed ratio between said input and output discs;links each connecting corresponding ends of said supporting members to suppress displacement of each friction roller which would occur when said input and output disk apply a thrust to the friction roller;articulated structures each being arranged between said hollow boss portion and the corresponding supporting member to permit a pivotal movement of the supporting member relative to said hollow boss portion only in a direction of the thrust; andpositioning structures each preventing a relative rotational movement between the supporting member and the corresponding hollow boss portion.