Importance

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Abstract

A transmission chain includes a plurality of cylindrical hollow bushes each of which has an outer circumferential surface press-fitted into a bush hole formed in at least one plate, as well as an inner circumferential surface rotatably supported by an outer circumferential surface of a pin. The at least one plate is arranged at such a position relative to a corresponding bush as to prevent a center portion of the bush from expanding radially outward even when the bush is press-fitted into the plate. Since deformation of a bush during press-insertion of the bush into the plates can be prevented and thus the parallelism of the inner circumferential surface of the bush is maintained, elongation of the chain which would otherwise occur due to wear at the initial stage of use of the chain is suppressed effectively.

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First Claim