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目前的轮胎式起重机广泛采用置于卷筒内部由两个行星排组成的封闭式行星传动作为卷扬装置的传动系统,简称封闭式行星传动卷筒。其结构简图如图1。封闭式行星传动简图
The current tire cranes are widely used in the drum by the internal planetary gear consisting of two planets as a winding device transmission system, referred to as the closed planetary transmission drum. The structure of Figure 1. Enclosed planetary transmission diagram