Excavator [1], also known as excavating machinery, also known as excavating machinery, is an earthmoving machinery that uses a bucket to excavate materials higher or lower than the bearing surface and load them into transport vehicles or unload them to the dump yard.

The materials excavated by excavators are mainly soil, coal, sand and soil and rock after pre-loosening. From the development of construction machinery in recent years, the development of excavator is relatively fast, excavator has become one of the most important construction machinery in engineering construction. The three most important parameters of excavator are: operating weight (mass), engine power and bucket capacity.