The main feature of the tire crane is: its driving cab and lifting control room are combined into one. It is evolved from a crawler crane (crawler crane), which turns the crawler and walking support part of the walking mechanism into a chassis with tires to overcome The shortcomings of crawler cranes (crawler cranes) causing damage to the road surface caused by the crawler plates are material handling machinery.

The bridge crane is a lifting equipment that is horizontally framed over the workshop, warehouse and material yard for material lifting. Because its two ends are located on tall concrete columns or metal supports, it looks like a bridge. The bridge frame of the bridge crane runs longitudinally along the tracks laid on the elevated bridges on both sides, which can make full use of the space under the bridge frame to lift materials without being hindered by ground equipment. It is the most widely used and the largest number of cranes.

Some of the working characteristics of lifting equipment is intermittent movement, that is, the corresponding mechanism of reclaiming, transporting, unloading and other actions in a working cycle is alternately working. The development and use of cranes in the market are becoming more and more extensive. Due to the fact that there are often some accidents when traveling without outriggers and lifting, the traveling speed is also faster than crawler cranes (crawler cranes); the operation is stable, the lifting capacity is large, and the lifting can be carried in a specific range, but the road must be smooth and solid , The tire pressure meets the requirements, and the lifting should not exceed 50cm from the ground; long-distance walking with load is prohibited. In order to ensure the safety of the operation, hoisting operations without hitting the outriggers are basically prohibited in China. The types of steel wire ropes used for cranes include phosphating-coated steel wire rope, galvanized steel wire rope and smooth steel wire