Tramcar narrow-gauge railway transport vehicle mines transport coal, ore and waste rock and other bulk materials, are generally required traction locomotive or winch. Harvesters basic components: the frame include car beams, buffers and axis card. Car beam is the main bearing member tramcar. In addition to gravity and traction carriages outside the coal mine tub, in operation to withstand great shock, vibration and other additional loads. Car manufacturing special steel beams in general. Mine car transport coal mines, ore and waste rock and other bulk materials handling vehicles narrow gauge railway Qinghai Coal mine car, generally required traction locomotive or winch. Harvesters basic components: the axis card is connected to the frame and the wheel body, the current use of the plug. Wheel is undercarriages tub, according to different structures, there are open and closed two.