| 摘要 |
A cross groove variety of constant velocity universal joint includes an inner race 11 having a plurality of grooves 14 formed in an outer surface 13 thereof and an outer race 15 having a plurality of grooves 18 formed in an inner surface 16 thereof. For each pair of associated inner and outer race grooves 14, 18, the inner race groove 14 is inclined in one direction relative to the rotational axis of the joint, while the outer race groove 18 is inclined in the opposite direction. A ball 20 is disposed in each of the associated inner and outer race grooves 14, 18 for providing a driving connection between the inner and outer races 11, 15. A cage 21 is provided for retaining the balls 20 in the grooves 14, 18. In a first embodiment (Figures 1 and 2) mating spherical surfaces 17, 23 are formed on the inner surface 16 of the outer race 15 and the outer surface of the cage 21. The engagement of these spherical surfaces 15, 23 prevents the centre of the joint from moving axially during use. In a second embodiment (Figure 3), mating spherical surfaces 43, 34 are formed on the inner surface of the cage 41 and the outer surface 33 of the inner race 31 for the same purpose. <IMAGE>
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