| 摘要 |
A pivot pin assembly is disclosed which eliminates the need for a high pre-load torque to be applied in order to fix a friction-reducing element relative to the pivot pin. The pivot pin assembly includes a pivot pin having a shoulder formed on a central cylindrical portion thereof which is received in the bores of a forked member and in the bore of an intermediate member located therebetween. The pivot pin, has a conical surface at one end and is held fast in the bore of the other forked member by a collet which also has a tapered surface. The tapered surfaces of both the pin and the collet are mateable with the surfaces of the bores in the forked members as the collet is physically bolted to the pivot pin. A friction reducing element, having an inner and an outer race, is positioned about the central portion of the pivot pin such that the outer race is press-fitted into the bore of the intermediate member while the inner race is slidably received on the pivot pin and abuts against the aforementioned shoulder. An axial force is applied to the inner race by a compression spring which is positioned about the periphery of the pivot pin between the collet and the friction reducing element. The spring takes up slack between the collet and the pivot pin shoulder such that the conical surfaces can tightly interact. The spring also permits the friction reducing element to be held fixed relative to the pivot pin without requiring a high pre-load torque to be applied to the attaching bolt. |
