Introduction of excavator
First, the definition of excavators, excavators, also known as mining machinery (excavating machinery), is digging with bucket mining materials above or below the surface of the machine, and loaded into the transport vehicle or dump to the stacker of earthmoving machinery. The main materials are soil, coal, sediment and soil and rocks that have been pre - loosened. From the development of engineering machinery in recent years, the development of excavator is relatively fast, and excavator as one of the most important construction machinery models in engineering construction, the correct selection is also more important. Two, a brief history of excavator first hand excavator has been developed for more than 130 years of history, has experienced a gradual development process of automatic hydraulic excavator driven by steam rotary bucket excavator to the internal combustion engine and electric drive rotary excavator, application of mechatronics technology during the. The first hydraulic excavator was successfully invented in japan. Due to the application of hydraulic technology, 1940s has been installed in the tractor equipped with a backhoe hydraulic excavator suspension, in early 1950s, and have been developed in the mid towed rotary hydraulic excavators and crawler hydraulic excavator.
Excavator, also called excavating machinery, is a kind of earthmoving machine that uses bucket to excavate material that is higher than or lower than the machine surface and is loaded into transportation vehicle or unloaded to the stacker. Excavators are mainly made of soil, coal, sediment, and soil and rocks that have been pre - loosened. From the development of engineering 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 operation weight (quality), engine power and bucket bucket capacity.
The hydraulic excavator of the early trial production is the hydraulic technology adopting the airplane and the machine tool. It lacks the hydraulic component suitable for all kinds of working conditions of the excavator, the quality of manufacture is not stable enough, and the supporting parts are not complete. Since 1960s, hydraulic excavators have entered the stage of popularization and vigorous development, and the production and production of excavators and excavators in various countries have been increasing rapidly, and production has soared. In the past 1968-1970 years, hydraulic excavators have accounted for 83% of the total output of excavators, and are now close to 100%. Three 、 the structure of excavator, the common excavator structure includes power device, working device, slewing mechanism, control mechanism, transmission mechanism, walking mechanism and auxiliary facilities, etc.. In appearance, the excavator consists of three parts: the working device, the upper rotating platform and the walking mechanism.
