Generally composed of a power device, a transmission device, a walking device and a working device. Principle: Use a bucket to excavate materials above or below the carrier surface and load the earth moving machinery into the transport vehicle or unloaded to the stockyard. A self-propelled mining machine that uses a bucket to shovel a strip or mineral product from a work surface and transport it to a discharge site for unloading. History: The first manual excavator has been in existence for more than 130 years, and it has experienced a fully automatic hydraulic excavator from steam driven bucket rotary excavator to electric drive and internal combustion engine driven rotary excavator, applying electromechanical and hydraulic integration technology. Gradually develop the process.
Due to the application of hydraulic technology, in the 1940s, there was a suspended excavator equipped with a hydraulic backhoe on the tractor. In the early and mid-1950s, a towed full-flush hydraulic excavator and a crawler-type full hydraulic excavator were successively developed. . The hydraulic excavator that was initially trial-produced is hydraulic technology using aircraft and machine tools. It lacks hydraulic components suitable for various working conditions of excavators. The manufacturing quality is not stable enough, and the supporting parts are not complete. Since the 1960s, hydraulic excavators have entered the stage of promotion and vigorous development, and the number of excavator manufacturers and varieties in various countries has increased rapidly, and the output has soared. Between 1968 and 1970, the output of hydraulic excavators accounted for 83% of the total output of excavators, and is now close to 100%.