| 摘要 |
A constant velocity stroking joint includes a housing having an inner cylindrical surface formed with axial guide channels aligned with guide channels of an inner race to provide axial ball tracks for a set of spherical balls. A double offset outer cage has a part-spherical outer diameter surface and a spherical inner diameter surface with centers of curvature axially offset from a center plane of the balls on opposite side thereof to provide constant velocity. An intermediate cage is provided between the inner race and outer cage having a spherical outer diameter surface with a radius of curvature matching that of the mating surface of the outer cage for maintaining constant velocity. The intermediate cage has a cylindrical inner diameter surface mating with a cylindrical outer diameter surface of the inner race, enabling the inner race to stroke axially of the outer cage with low friction, low load rolling action of the balls along the ball tracks while maintaining a constant velocity characteristic for all axial stroke conditions.
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