| 摘要 |
An oil-free chain is provided to prevent sliding-contact wear between outer circumferential surfaces of connecting pins and inner circumferential surfaces of bushes. An oil-free chain(100) comprises an inner link including a pair of end portions of bushings(130) that are press-fitted to bushing holes of a pair of inner plates(110) and an outer link including both end portions of connecting pins(160) penetrating into the bush that are press-fitted to pinholes of a pair of outer plates(150). The inner link is alternately connected with the outer link lengthwise of the chain. In addition, lubricant is sealed between inner circumferential surfaces of the bushings and outer circumferential surfaces of the connecting pins. An end portion of each bushings is projected from outer surfaces of the inner plates. The end portions are supported to a bush bearing portion extending as an offset state.
|
