| 摘要 |
PROBLEM TO BE SOLVED: To provide a uniform movement universal coupling which improves durability, reduces induction thrust, increases the strength of the leg shaft and the ring, and reduces the processing cost. SOLUTION: Three axial track grooves 4 are formed in the internal periphery. In a uniform movement universal coupling provided with the external joint member 1 having a roller guide face 5 in the axial direction at both sides of the respective track grooves 4, a tripod member 2 having three leg shafts 6 radially projected, a roller 9 contained in the track groove 4 of the external joint member 1, and a ring 7 externally inserted in the leg shaft 6 to rotatably support the roller 9 and in which a roller 9 can move in the axial direction of an external joint member 1 along the roller guide face, the outer peripheral face of the leg shaft 6 has a protruded spherical shape and the inner peripheral face of the ring 7 is formed in a cylindrical face. Further, a protrusion 11 limitting the relative displacement in the shaft direction between the ring 7 and the leg shaft 6 is provided at the inner peripheral face.
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