挖掘机动臂是用于操作挖掘机的部件，挖掘机是用于挖洞或移动大量材料的重型机械。挖掘机通常有一个底座，底座上有轨道或踏板固定在旋转的轮子上，还有一个称为“驾驶舱”的单元，可以旋转360度，这样操作员就可以在不重新定位整个单元的情况下接触到材料的各个方面。挖掘机动臂从房屋前部伸出，通常由两部分组成，以便更好地接近。
Excavator boom is a component used to operate excavator. Excavator is a heavy machinery used to dig holes or move a large amount of materials. Excavators usually have a base on which rails or pedals are fixed to the rotating wheels, and a unit called "cockpit" which can rotate 360 degrees, so that the operator can access all aspects of the material without repositioning the whole unit. The excavator boom extends from the front of the house and is usually composed of two parts for better access.
铲斗安装在挖掘臂的末端，负责挖掘和容纳要移动的材料。挖掘机动臂和铲斗的所有部件都是液压控制的。外部支柱充满液体——通常是某种油——并可以被加压，从而推动内部活塞向前。当压力释放时，活塞将缩回。这样，挖掘机动臂和铲斗这两个部分就可以从机器的操作室进行控制。
The bucket is installed at the end of the excavation arm and is responsible for excavating and containing the material to be moved. All components of the excavator boom and bucket are hydraulically controlled. The outer strut is filled with liquid - usually some kind of oil - and can be pressurized to push the inner piston forward. When the pressure is released, the piston will retract. In this way, the excavator boom and bucket can be controlled from the operating room of the machine.
超大型挖掘机的动臂通常是钢制的。臂的两个部分是铰接的，这是可能的，因为在两个臂部分之间的连接点处有轴承或衬套。液压装置安装在沿臂长的不同点上；他们的战略位置允许有效的锻炼，并将尽可能地伸展他们的手臂。其他液压装置安装在铲斗附近，用于伸出或缩回附件。这些也将被安装，以允许尽可能多的扩张和收缩。
The boom of super large excavator is usually made of steel. The two parts of the arm are hinged, which is possible because there are bearings or bushings at the connection point between the two arm parts. The hydraulic device is installed at different points along the arm length; Their strategic position allows for effective exercise and will extend their arms as much as possible. Other hydraulic devices are installed near the bucket to extend or retract attachments. These will also be installed to allow as much expansion and contraction as possible.
挖掘臂上可以连接其他附件。快速耦合设计允许用户切换铲斗的另一个附件，以适应特定的工作，从而增加机器的多功能性。其他附件可能包括手钻附件、压实轮、切割轮、抓钩臂等。当拿起或操作圆木和树木时，抓臂特别有用。凿岩机附件可用于快速有效地破碎混凝土或沥青。可以使用挖掘机耙和水陆两用附件拖水。用于高度化应用的其他特殊附件可以定制或通过有限的生产制造。
Other attachments can be attached to the boom. The quick coupling design allows the user to switch another attachment of the bucket to adapt to specific work, thereby increasing the versatility of the machine. Other accessories may include hand drill accessories, compaction wheel, cutting wheel, grab arm, etc. Grab arms are particularly useful when picking up or manipulating logs and trees. Rock drill accessories can be used to break concrete or asphalt quickly and effectively. Excavator rake and amphibious accessories can be used to tow water. Other special accessories for highly specialized applications can be customized or manufactured through limited production.
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