On one side, the tracked walking device is a tracked bearing,There is a loss of cloud friction between the hinges, rollers and channels, and the power consumption of the walking device during movement and the rotation is greater than that of the tire walking device. As a result, the efficiency is relatively low, the walking apparatus is of a large structure, the manufacturing costs are high, the components are easy to wear and the high maintenance costs.However, for traction vehicles that have to work outdoors, it is hoped that the walking system that interacts with the ground will provide greater traction. Most bulldozers therefore use equipment caterpillar.