固定式等速自在継手

Abstract

This invention provides a fixed constant velocity universal joint that achieves both high efficiency and a wide operating angle, while also exhibiting excellent NVH characteristics. [Solution] In a track groove intersecting type fixed constant velocity universal joint 1, the track grooves 7 and 9 of the outer joint member 2 and the inner joint member 3 have a first track groove portion 7a and 9a provided in the axial region including the joint center O, and a second track groove portion 7b and 9b for accommodating high operating angles. The ball trajectory centerlines Xa and Ya of the first track groove portions 7a and 9a form an arc shape with curvature centers Oo1 and Oi1 that are not offset axially with respect to the joint center O. The curvature centers Oo1 and Oi1 are offset by Fy in the radial direction with respect to the joint axis NN toward the ball trajectory centerlines Xa and Ya.

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