Common excavator structures include power unit, working device, slewing mechanism, operating mechanism, transmission mechanism, bucket teeth, walking mechanism and auxiliary facilities, etc. From the appearance, the excavator consists of working device, upper turntable, and walking mechanism It consists of three parts. The following is the classification of common excavators: 1. According to the driving mode of common excavators, there are internal combustion engine-driven excavators and electric-driven excavators. Excavators and electric excavators are mainly used in high altitude hypoxia and underground mines and other flammable and explosive places. 2. According to different ways of walking, excavators can be divided into crawler excavators and wheel excavators. 3. According to different transmission modes, excavators can be divided into hydraulic excavators and mechanical excavators. Mechanical excavators are mainly used in some large mines. 4. Excavators are classified according to their purpose. Excavators can be divided into general excavators, mining excavators, marine excavators, and special excavators. 5. Machinery is divided into buckets, and excavators can be divided into shovel excavators and backhoe excavators. Front shovel excavators are mostly used to excavate materials above the surface, and backhoe excavators are mostly used to excavate materials below the surface.