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What Are the Main Parts of Excavator?Tags: used komatsu excavators for sale used excavators for sale in australia2013-12-02
Excavator (including used excavator) now has become one of the main engineering machinery in engineering construction. Generally, transmission gear, operating gear, slewing gear, running gears are the main parts of an excavator. Looking from the exterior, the excavator consists of three parts --- the working device, the upper turret, running gear. A ccording to its structure and uses, it can be divided into a variety of types, such as crawler-type, rubber-type, walking-pedrail, full hydraulic, half of the hydraulic, rotary, the none rotary, general type, special type, radial type, telescopic jib type, etc.
The working device is one of the main components of hydraulic excavator. It is a kind of device which is done directly for mining tasks. And it consists of three parts such as movable arm, arm and bucket hinge. The mining equipment generally adopts the bucket rod oil cylinder to excavate. Movable arm oil cylinder is mainly used for adjusting the cutting Angle, remove obstacles, and full dipper bucket at the end of mining. Actually, movable arm ups and downs, bucket rod telescopic and bucket rotation are all controlled by reciprocating double-acting hydraulic cylinder. In order to meet the needs of the various construction works, excavators can be equipped with a variety of work device, such as mining, lifting, loading, level off, clamp, bulldozing, impact hammer and other operation equipments.
The body of rotary and walking device is a hydraulic excavator. And the upper turntable is equipped with power plant and driving system. As we all know, engine is the power source of the excavator, and in most cases, we can use motor when using diesel at a convenient site as well. Walking device of the reaction force can make the excavator for a short walk at the same time, according to the different structure, it can be divided into two categories---crawler-type and rubber-type. The crawler-type walking device is made up of roller, chain wheel, driving wheel, guide wheel, tensioning device, walking and other components of the hydraulic motor, reducer, etc. The hydraulic excavator walking device is driven by hydraulic motor, reducer, wheel, and each of the caterpillar has its own hydraulic motor and reducer. Besides, as the two hydraulic motor can be operated independently, the machine crawler can synchronize forward and back around, and also can be done through a caterpillar brake turn, and accidentally it can also be driven by two tracks the opposite direction to realize the spin. Above all, the operation is simple.
The slewing gear includes rotary drive device and slewing bearing.The slewing drive generally adopts quantitative motor, it realizes the rotation through gear reducer. Moreover, it has plenty of advantages, such as compact structure, small size, high speed and efficiency rate, strong carrying capacity, small heat and power loss, reliable work, etc, Rotary bearing generally used rolling bearing whose one of the most widely used is single row and double row ball type roller slewing bearing.
The transmission gear pass the engine power through the hydraulic pump to the actuators such as the hydraulic motor and hydraulic cylinder. As a result it will promote the working device, so as to complete all assignments.
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