| 摘要 |
PROBLEM TO BE SOLVED: To ensure concentricity in a wide range by extending a second thrust washer outward in an axial direction so as to separate from a first thrust washer, and providing with a wide rim engaged with a cylindrical guide surface of a second supporting member. SOLUTION: First and second thrust washers 68, 70 are provided with first and second thrust surfaces 82, 84, and are engaged with first and second supporting members 64, 66, and a radial direction thrust surface 86 to which the thrust surface 84 is pushed down is arranged on the supporting member 66. A cylindrical guide surface 88 of the supporting member 66 is extended in an axial direction to a plane surface corresponding to the thrust surface 82, and an annular groove 92 is arranged between the guide surface 88 and the thrust surface 86. A wide rim 90 which is extended for a length of an axial direction is arranged in a direction separated from a roller and the thrust washer 68 on the thrust washer 70, its guide surface is engaged with the cylindrical guide surface 88, and is extended in an annular groove 92. An assembly 62 is guided extending over an axial direction distance which is equal to the sum of the distance between the thrust surfaces 82 and 84 and the length of an axial direction of the wide rim 90. And thereby, it is possible to ensure concentricity of the supporting member 66. |
