Transport vehicle

The utility model provides a transport vehicle, and relates to the technical field of material transport. The transport vehicle comprises a frame, driving wheels and suspension mechanisms, wherein thedriving wheels and the suspension mechanisms are oppositely arranged on the two sides of the frame. The suspension mechanism comprises a movable base, a fixed plate, a nitrogen spring and a guide column arranged between the movable base and the fixed plate in a supporting mode. The guide columns are arranged in the guide holes in a penetrating mode and fixedly connected with the frame. The movable base can move up and down along the guide column relative to the frame. The nitrogen spring is elastically deformed along with the movement of the moving seat, and the elastic pressure of the nitrogen spring is transmitted to the driving wheel through the moving seat, namely the driving wheel is pressed to the ground. When the transport vehicle runs to the uneven ground, the nitrogen springs cankeep constant pressure ap