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What is the working principle of the excavator?

Release Time: 2021-04-21


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What is the working principle of the excavator?

Excavator structures include power unit, working unit, slewing mechanism, operating mechanism, transmission mechanism, walking mechanism and auxiliary facilities.

The transmission mechanism transmits the power of the engine to hydraulic motors, hydraulic cylinders and other actuators through the hydraulic pump, and pushes the working device to move, thereby completing various tasks.

Used Doosan DX55-9C excavator

Walking device of excavator

The walking device is the chassis, including the crawler frame and the walking system. It is mainly composed of the crawler frame, the walking motor + reducer and its pipeline, the driving wheel, the guide wheel, the supporting wheel, the supporting wheel, the crawler, and the tensioning buffer device. 

The function is to support the weight of the excavator and convert the power transmitted by the driving wheels into traction to realize the walking of the whole machine.

The frame assembly (ie, the crawler walking frame assembly) is an integral welded part with an X-shaped structure. Its main advantage is that it has a high load-bearing capacity. 

The frame assembly is welded by three parts: the left longitudinal beam (that is, the left crawler frame), the main frame (that is, the middle frame), and the right longitudinal beam (that is, the right crawler frame). The weight of the frame assembly is 2 tons.

Doosan DX55-9C excavator

The central swivel joint is a hydraulic component that connects the slewing platform and the oil circuit of the chassis. It ensures that after the slewing platform rotates at any angle, the walking motor can still distribute oil normally.

Working device of excavator

The main component of the hydraulic excavator is the working device. At present, the SY series excavator is equipped with a backhoe working device. 

It is mainly used to excavate the soil below the stop surface, but it can also excavate the soil below the maximum cutting height, except for digging. 

Ditching and loading can also carry out simple site leveling work. Excavation work is suitable for excavating the soil of grade Ⅰ~Ⅳ, and above grade Ⅴ, hydraulic hammer or blasting means are required.

The backhoe working device is composed of main parts such as boom, stick, bucket, rocker, connecting rod, and working device hydraulic pipeline including boom cylinder, stick cylinder and bucket cylinder.

Doosan DX55-9C excavator,used excavators supplier, guarantees the quality of used excavators, at reasonable prices and high cost performance.