Abstract: According to Archard’s wear theory, the internal wear analysis of the Rzeppa constant velocity universal joint is carried out. By calculating the instantaneous angular velocity of the ball in the groove and the contact point between the groove and the ball, the instantaneous sliding and rolling of the ball in the groove are analyzed. The sliding and rolling state of the ball in the groove is judged, and the law of the change of friction force between the ball and the star sleeve and the bell shell with the input end rotation angle and axe swing angle is obtained. The results of geometric derivation and computer simulation also show that the wear type of ball cage constant velocity universal joint is fatigue wear and the wear condition in seven-channel universal joint is better than that in six-channel joint. At the same time, the specific relationship between volume wear rate and input shaft speed, rotation angle and swing angle is deduced, which lays an important theoretical foundation for the follow-up study

Key words: Rzeppa constant velocity universal joint, inner and outer raceway, wear analysis