由于偏心轮可装于轴的任何部位，不必把主轴作成曲柄。

Because an eccentric can be attached anywhere along a shaft, it is unnecessary to form any part of the shaft into a crank.

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设计的新型三环减速器主要由圆弧齿同步齿形带、小带轮、大带轮、曲柄轴、传动环板、输出轴、外齿轮和箱体等组成。

Newly developed three ring gear reducer is comprised of synchronous belt, big and small pulleys, crankshaft, drive ring plate, output shaft, external gear and case.

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