The working principle of a kind of hydraulic-mechanical combination driving device based on lever-toggle force-amplifier was introduced in the article, its force calculation formulas are given also.

介绍了一种基于杠杆-铰杆增力机构的液压-机械复合传动装置的工作原理，给出了其力学计算公式。

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Furthermore, one hand lever (5) is connected by a joint to one of the jaws (7), and a pressure support is located between the hand levers (4, 5) for the formation of a toggle (K).

另外，一个手柄(5)通过接头连接到其中一个钳口(7)，并且压力支撑件位于手柄(4,5)之间用于形成曲柄杠杆机构(K)。

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