| 摘要 |
PROBLEM TO BE SOLVED: To provide a constant velocity universal joint having sufficient reliability and durability even at a high operation angle. SOLUTION: An outer ring groove 1b is formed of two arcs 1b1, 1b2. The center O11 of the arc 1b1 in the back side is arranged in the outer side in the radial direction from an axial line L, and the center O12 of the arc 1b2 in the opening side is arranged in the inner side in the radial direction from the axial line L. An inner ring groove 2b is formed of two arcs 2b1, 2b2. The center O21 of the arc 2b1 in the back side is arranged in the inner side in the radial direction from the axial line L, and the center O22 of the arc 2b2 in the opening side is arranged in the outer side in the radial direction from the axial line L. A connection point P of the two arcs 1b1, 1b2 of the outer ring groove 1b and the centers O11, O12 of the respective arcs 1b1, 1b2 are arranged on a single outer ring groove straight line So. A connection point Q of the two arcs 2b1, 2b2 of the inner ring groove 2b and the centers O21, O22 of the respective arcs 2b1, 2b2 are arranged on a single inner ring groove straight line Si. The outer ring groove straight line So and the inner ring groove straight line Si are formed symmetrically in regard to a joint center C. COPYRIGHT: (C)2008,JPO&INPIT
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