| 摘要 |
<p>A roller-chain bushing (18) with a stress-relief opening (22) centrally located along the seam (24) of a rolled or roll-formed bushing includes a tapered or relief segment (64,68) at each bushing end to permit compressive fitting of the bushing ends into a link-plate hole thereby minimizing deformation of the bushing end, which tapered or relief segment (64,68) is locally deformed or worked at a specific location prior to forming the bushing (18) and the tapered segment (64,68) is provided in a bushing region diametrically opposite the seam (24) to reduce barrelling of the bushing (18) at mating of the bushing (18) with the roller link-plate (12), and positioning of the tapered region (64,68) along the chain pitch line (32) at the point of stress concentration during chain assembly reduces the initial wear of the pin (16) and bushing (18) from initial chain loading. <IMAGE> <IMAGE></p> |
