| 摘要 |
A constant velocity universal joint comprises an outer joint member having a plurality of grooves in the surface of a cylindrical bore therethrough. An inner joint member within the bore has grooves on its outer surface opposing the outer member grooves and a ball is positioned in each pair of opposed grooves. A cage between the joint members has a plurality of openings spaced to position the centers of the balls in a plane perpendicular to the axis of the cage. The inner spherical surface of the cage is guided upon the outer spherical surface of the inner joint member and the cage also has an outer spherical surface. The centers of the spherical surfaces of the cage are equidistant on opposite sides of the ball plane. One or more axially extending second grooves in the surface of the outer joint member bore are so disposed that each of said second grooves is between two adjacent ball grooves in the bore. A key is positioned within each one of the second grooves to engage the outer spherical surface of the cage. The key or keys are restrained against axial displacement or may have limited axial displacement.
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