Patent ID: 8007388
Filing Date: 2011-08-30
Classification: F16G

Abstract:
1. A plate-link chain for a belt-driven conical-pulley transmission having a variable transmission ratio, said chain comprising: a plurality of link plates pivotally connected with each other via pairs of rocker members that include two rocker members each, the rocker members running transversely to the longitudinal direction of the plate-link chain and being situated in openings in the link plates, curved contact surfaces situated on the rocker members and in the openings of the link plates, along which curved surfaces the rocker members and link plates bear against each other to transmit force, and curved rolling surfaces situated on the rocker members along which the rocker members roll on each other and/or slide on each other along pitch lines to transmit force, wherein each of the link plate openings has at least three spaced contact regions that are inwardly convexly curved, and wherein two of the inwardly convexly curved contact regions of each of the plate openings, namely a first inwardly curved contact region and a second inwardly curved contact region, when viewed in a cross sectional view in the direction of the rocker member height, lie on opposed facing surfaces of each of the link plate openings and substantially within an area that is defined between a first contact point line that passes through pitch lines of two adjacent rocker member pairs when the chain is in a swing-back condition, and a second contact point line that passes through pitch lines of two adjacent rocker member pairs when the plate-link chain is in a fully curved condition as the chain passes around a wheel.