| 摘要 |
A power transmission chain has a plurality of overlapping inner (11) and outer (12) link plates interconnected by transverse pins (13) that pass through aligned apertures in the overlapping plates (11,12). The pins (13) are square or rectangular in cross section and one of the planar surfaces on each pin is designed to bear against an arcuate bearing surface (17) defining part of the aperture in the inner link plate (11). The outer link plate (12) has a square or rectangular aperture (16a) that is a friction fit with the pin (13). The arrangement provide an articulating joint in which there is rolling contact between the planar and arcuate bearing surfaces during articulation of the first link member on the pin and thus reduces noise and wear.
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