Patent ID: 6652385
Filing Date: 2003-11-25
Classification: F16D,Y10S

Abstract:
A constant velocity universal joint comprising:an outer joint member having a curved guide groove formed in the axial direction on a spherical inner circumferential surface thereof; an inner joint member having a curved guide groove formed in the axial direction on a spherical outer circumferential surface thereof; a ball track formed by the coordination of the guide groove of said outer joint member and the guide groove of said inner joint member that opposes the former, the ball track having a wedge-like shape that reduces toward one side in the axial direction; a torque transmitting ball disposed in the ball track; a cage having a pocket for holding the torque transmitting ball; and a preloading means that reduces a clearance between the torque transmitting ball and the ball track, wherein a clearance &dgr; of the pocket in the axial direction between the pocket of said cage and the torque transmitting ball is set in a range of 0&gE;&dgr;&gE;55 &mgr;m, wherein said preloading means comprises an elastic member interposed between said inner joint member and the cage, and wherein the elastic member presses said inner joint member in a direction opposite to an offset direction of a center of the guide groove of said inner joint member.