Excavator

Common excavator structures include power devices, working devices, slewing mechanisms, control mechanisms, transmission mechanisms, walking mechanisms, and auxiliary facilities.
The transmission mechanism transmits the power of the engine to the hydraulic motor, hydraulic cylinder, and other executive elements through the hydraulic pump, and promotes the action of the working device, to complete various operations.
Walking device
The walking device is the chassis, including the crawler frame and the walking system, which is mainly composed of the crawler frame, the walking motor + reducer and its pipeline, the driving wheel, the guide wheel, the carrier sprocket, the supporting wheel, the crawler, and the tension buffer device. Its function is to support the weight of the excavator and transform the power transmitted by the driving wheel into the traction force, to realize the walking of the whole machine.
The frame assembly (i.e. crawler walking frame assembly) is an integral weldment with an X-shaped structure. Its main advantage is its high bearing capacity. The frame assembly is composed of three parts: left longitudinal beam (left track frame), mainframe (middle frame), and right longitudinal beam (right track frame). The weight of the frame assembly is 2 tons.
The central rotary joint is a hydraulic component connecting the rotary platform and the oil circuit of the chassis. It ensures that the walking motor can normally distribute oil after the rotary platform rotates at any angle. The current rotary joint is 5-way.
Working device
The working device is the main part of a hydraulic excavator. At present, sy series excavator is equipped with a backhoe working device, which is mainly used to excavate the soil below the parking surface but can also excavate the soil below the maximum cutting height. In addition to digging, trenching, and loading, it can also carry out simple site leveling work. The excavation operation is suitable for excavating grade I ~ IV soil, and a hydraulic hammer or blasting method is required for grade V or above.
The backhoe working device is composed of the boom, stick, bucket, rocker, connecting rod, and hydraulic pipeline of the working device including boom cylinder, stick cylinder, and bucket cylinder.