Tire crane: the use of tire type chassis traveling boom rotating crane.

The tire crane is a kind of full rotary crane which is installed on a special chassis composed of heavy tires and axles. Its upper structure is basically the same as that of the crawler crane. In order to ensure the stability of the fuselage during installation, the crane is equipped with four retractable legs. On the flat ground, it is not necessary to use outriggers for small lifting and low-speed driving of lifting objects. It consists of two parts: getting on and getting off. The upper carriage is the lifting operation part, equipped with boom, lifting mechanism, luffing mechanism, counterweight and turntable, etc.; the lower carriage is the supporting and walking part. The upper and lower parts are connected by slewing rings. In order to ensure the stability of the crane, it is generally necessary to lay down the legs, increase the bearing surface and level the fuselage.