| 摘要 |
A torque converter comprises an input member and an output member that are interconnected by a planetary gear arrangement. A planet carrier of the planetary gear arrangement is driven by the input member and a sun wheel of the planetary gear arrangement is also driven by the input member, but through an infinitely variable change-speed mechanism which includes an adjustable pulley chain-drive mechanism using a chain. A preferred construction for the chain includes links pivoted to one another by members that bear on one another with convex surfaces. The torque converter can be used singularly or two torque converters can be employed, independently to drive the rear wheels of a tractor and to assist steering of the tractor.
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