电动牵引车以蓄电池为动力,环保性能优良,生产作业效率高,广泛应用于铁路、机场等物流系统。目前,电动牵引车的前进、后退动作主要受方向开关总成上的进退开关、加速器、电控单元和电动机控制。这种控制方式有3个缺点:一是当牵引车与托盘车进行拖挂作业时,不能精确调整牵引销与托盘车挂钩的位置,容易碰伤牵引车车体; Electric tractor battery-powered, excellent environmental performance, high production efficiency, widely used in railways, airports and other logistics systems. At present, the forward and backward movement of the electric tractor is mainly controlled by the advance / retreat switch, accelerator, electric control unit and motor on the direction switch assembly. This control has three shortcomings: First, when the tractor and the pallet truck for towing operations, can not accurately adjust the position of the traction pin and the pallet truck hook, easy to bruise the tractor body;