Excavator is one of the main construction machinery of earth and
rock engineering. It is mainly composed of power plant, transmission, action,
slewing mechanism, operating mechanism, electrical equipment, work device and
so on. The working device can be according to the requirements of different
variable for several types, so it is widely used in highway, railway,
construction, mining, national defense, and other projects. According to statistics,
more than 60%’s earth and rock engineering is completed by excavator. At
present, backhoe excavator is mainly used in highway engineering. Backhoe
excavator is mainly used for excavation conditions in the highway construction,
and its basic practices have ditch excavation and excavation of the side ditch.
To sum up, the excavator is applied in excavating material which is higher
or lower than the bearing machine and load into transport vehicles or discharge
to the stocking yard earthmoving machines. Excavating material is mainly loose
soil, coal, sediment, and the soil and rocks. From the point of the development
of construction machinery in recent years, the development of the excavator is relatively
quickly, and the excavator as one of the main engineering machinery model in
engineering construction, its right selection is more important. At the same
time, when meeting with the geological disasters such as typhoon, earthquake, and
mud-rock flow, excavators have also played a decisive role, alleviate sufferings
to the victims.
