| 摘要 |
PROBLEM TO BE SOLVED: To prevent a rattling occurrence in an axial direction of a spider and to reduce a bending torque by specifying a shape size and a material in a pin engaged with an axial hole of a cross shaft and projected from a shaft end. SOLUTION: In a state that a thrust piece 8 is inserted into an axial hole 65 of a spider 6, an end thereof is projected from a shaft portion 61 and is engaged with a bottom surface of a bearing cup 71. When press-inserting the cup 71, the piece 8 causes a compression elastic plastic deformation and retains an axial predetermined position by a previous pressure. The piece 8 is made of a polyacetal or polyamide resin and a convergent projection 82a is formed on an outer side of large diameter portions 82, 82 at both ends of a small diameter portion. When a length of the small diameter portion 81 of the piece 8 is 2.5-3.3 mm, a ratio of a sectional area and a length of the small diameter portion 81 is made to 1.7-2.4, and when the length is 3.3-4.1 mm, the ratio of the sectional area and the length is made to 1.5-2.2. Thereby, a rigidity of the small diameter portion 81 of the thrust piece 8 is appropriately adjusted.
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