Common excavator structures include power units, work devices, slewing mechanisms, steering mechanisms, transmission mechanisms, running gear and auxiliary facilities.
From the appearance, the excavator consists of three parts: the working device, the upper turntable, and the running mechanism. According to its structure and use, it can be divided into: crawler type, tire type, walking type, full hydraulic, semi-hydraulic, full rotation, non-full rotation, general purpose, special type, articulated type, telescopic arm type and so on.
The working device is a device that directly performs the excavation task. It is hinged by three parts: boom, stick and bucket. The boom landing, the stick telescopic and the bucket rotation are all controlled by a reciprocating double-acting hydraulic cylinder. In order to meet the needs of various construction operations, the excavator can be equipped with a variety of work equipment, such as digging, lifting, loading, leveling, clamping, dozing, impact hammer and other work tools.
The swinging and running device is the body of the hydraulic excavator, and the power unit and the transmission system are arranged on the upper part of the turntable. The engine is the power source of the excavator. Most of the diesel is used in a convenient place, and the electric motor can be used instead.
The transmission mechanism transmits the power of the engine to the actuators such as the hydraulic motor and the hydraulic cylinder through the hydraulic pump, and pushes the working device to perform various operations.
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