This paper presented a lumped-parameter model for planetary gears, including mesh stiffness variation.

本文建立了时变啮合刚度的直齿行星齿轮动力学模型。

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The bike chain drives a sun gear on the rear axle, which transmits power to planetary gears situated around it.

自行车的链条会驱动后轮轮轴上的太阳齿轮，将动力传送到四周的行星齿轮。

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We review the existing problems, the present and future of the research on inner planetary gears with small tooth number differences.

评述了少齿差内齿行星齿轮传动的研究现状、存在的问题和将来的研究方向。

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In addition to the petrol engine and electric motor, the LF-CC hybrid drive system further comprises a generator, a high-performance battery, a power split device which, via planetary reduction gears, combines and re-allocates power from the engine, electric motor and generator according to operational requirements, and a compact power control unit to govern the high speed interaction of the system components.

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Instead of stepped gears like a conventional transmission, it has a fixed planetary gear, and changes engine speed by adjusting the generator electric load.

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