介绍了该车的车架、传动装置、弹簧支座、弹簧组合和主动轮部件等设计。

The designs of the vehicle's frame, transmission device, spring support, spring combination and driving wheel component, etc. were introduced.

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由于空腹轨道内空间小，驱动轮安装在空腹轨道外部，靠弹簧力产生的摩擦力带动小车运行。

Because the inner space of a hollow track is small, a driving wheel is arranged outside the hollow track in the prior art, and a dolly is driven to move by friction force generated by spring force.

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