Patent ID: 9163672
Filing Date: 2015-10-20
Classification: F16D

Abstract:
1. A fixed type constant velocity universal joint, comprising: an outer joint member having: an inner joint member having a spherical outer peripheral surface provided with a plurality of track grooves that are paired with the plurality of track grooves of the outer joint member; a plurality of balls for transmitting torque, the plurality of balls being interposed between the plurality of track grooves of the outer joint member and the plurality of track grooves of the inner joint member; and a cage for holding the plurality of balls, the cage having a spherical outer peripheral surface and a spherical inner peripheral surface that are fitted respectively to the spherical inner peripheral surface of the outer joint member and the spherical outer peripheral surface of the inner joint member, wherein each of the plurality of track grooves of the outer joint member comprises: wherein the first track groove portions each comprise a circular-arc part having a curvature center that is prevented from being offset in the axial direction with respect to a joint center, wherein the first track groove portions are inclined in a circumferential direction with respect to a joint axial line, and adjacent pairs of the first track groove portions in the circumferential direction are inclined in opposite directions, wherein the second track groove portions each have a shape that is different from a shape of each of the first track groove portions, wherein the first track groove portions and the second track groove portions are connected respectively to each other on the opening side with respect to the joint center, and wherein each of the plurality of track grooves of the inner joint member is formed to be mirror-image symmetrical with a corresponding one of the plurality of track grooves of the outer joint member with respect to a plane comprising the joint center at an operating angle of 0°.