| 摘要 |
PROBLEM TO BE SOLVED: To constantly obtain the stable contact pressure regardless of the bending operation and to protect a spherical bearing part without affected by the rotational centrifugal force in a double Cardan joint. SOLUTION: In a double Cardan joint, an annular part 12 externally surrounding a cylindrical part 9 of a socket yoke 2 is mounted at a pin yoke 1 side, an inner peripheral surface of this annular part 12 is formed into the shape of a recessed sphericity concentric to a center of the joint, and an end of the cylindrical part 9 is provided with a seal 13 contacted with an inner peripheral surface of the annular part 12. That is, as the inner peripheral surface of the annular part 12 is formed into the shape of the recessed sphericity concentric to the joint center, a fastening margin of the seal 12 can be approximately uniformly kept on any sliding position when the seal 13 mounted on the cylindrical part 9 of the socket yoke 2 side is slided and moved on the inner peripheral surface of the annular part 12 at the pin yoke 1 side.
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