| 摘要 |
A reduction drive assembly for driving a chain or circular drum having a plurality of circular roller elements and including a shaft having first and second opposite disposed offset eccentrics with the first gear movably mounted on the first eccentric and a second gear movably mounted on the second eccentric with the gears having guide holes therein and guide pins extending between a pair of plates and through the guide holes for controlling the relative rotation between the gears. The novelty in the assembly resides in the configuration of the periphery of the gears, i.e., the tooth shape, as defined mathematically in terms of x and y coordinates with the x and y axes passing through the center of the gear. The gears are also novel in that the guide holes extending through the gears are disposed on centers located relative to the crown of a gear tooth and the adjacent root or throat.
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