Rocker joint pin type CVT chain

摘要

An improved rocker joint pin type CVT chain has link plates connected by rocker joints, each including a rocker pin and a seat pin in an insertion bore of the link plate, the rocker pin and the seat pin making rolling contact along opposing rolling arcuate surfaces thereof as the chain bends and straightens when passing around a pulley. At respective minimums, the sectional area of the link plate formed between the link plate insertion bore and the outer periphery of the link plate relative to the pulley, is greater than the sectional area formed between the link plate insertion bore and the inner periphery. The radii of curvature of the inner rolling contact surfaces of the rocker pin and seat pin are smaller than those of the outer rolling contact surfaces. The fatigue strength at the minimum sectional area portions is thereby increased and the deviation from the chain center line of the contact point of the opposing rolling contact surfaces is minimized in a straightened position of the chain, thereby reducing the load applied to the inner minimum sectional area portion.