Patent ID: 6488588
Filing Date: 2002-12-03
Classification: F16D,Y10S

Abstract:
A ball fixed type 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 disposed in a ball track formed by the coordination of the guide groove of the outer joint member and the guide groove of the inner joint member, and a cage that holds the ball, with the center of the guide groove of the outer joint member and the center of the guide groove of the inner joint member being offset to the opposite sides to each other by equal distances in the axial direction with respect to the center plane of the joint that includes the center of the ball, whereinthe inner joint member is allowed to make relative displacement in the axial direction with respect to the cage, and elastic pressing means having a spherical surface that makes fitting contact with the outer circumferential surface of the inner joint member is interposed between the outer circumferential surface of the inner joint member and the inner circumferential surface of the cage, so that the elastic force of the elastic pressing means presses the outer circumferential surface of the inner joint member to the side opposite to the offset direction of the center of the guide groove thereof and wherein the inner joint member makes a relative displacement in the axial direction opposite to the offset direction to elastically press the ball for applying a preload between the ball track and the ball.