伸缩臂挖机租赁能告知你的是，伸缩臂挖机具有哪些特征，因为这种设备是装在挖掘机大臂上的一种特殊工作装置；用于灵活扩展其作业半径以及垂直深挖范围。
What the leasing of telescopic boom excavator can tell you is what characteristics the telescopic boom excavator has, because this equipment is a special working device installed on the boom of excavator; It is used to flexibly expand its operation radius and vertical deep excavation range.
外伸缩臂，其特征主要在于：
The extended and retracted arm is mainly characterized by:
1、外伸缩臂由上滑动臂与下固定臂两部分构成，上滑动臂安装在下固定臂上方，通过两侧滚轮及道轨上下组成活动体，通过伸缩缸的伸缩来推动上滑动体前后自由伸缩
1. The extended and retracted arm is composed of an upper sliding arm and a lower fixed arm. The upper sliding arm is installed above the lower fixed arm and forms a movable body up and down through rollers on both sides and track rails. The upper sliding body can expand and retract freely back and forth through the expansion and contraction of the expansion cylinder

2、上滑动臂内装伸缩缸，伸缩缸的缸体固定在下固定臂上，伸缩缸活塞杆固定在上滑动臂上。其主要部件有：固定体、移动体、滑块、伸缩缸等。外伸缩臂具有受力大、结构简单，能够自由调整工作半径、调整挖掘深度，易于操作，适应特定环境作业。但其行程较小，一般其行程在4米内。
2. A telescopic cylinder is installed in the upper sliding arm, the cylinder body of the telescopic cylinder is fixed on the lower fixed arm, and the piston rod of the telescopic cylinder is fixed on the upper sliding arm. Its main components are: fixed body, moving body, sliding block, telescopic cylinder, etc. The extended and retracted arm has the advantages of large force, simple structure, free adjustment of working radius and excavation depth, easy operation and adaptation to specific environment. However, its travel is small, generally within 4 meters.
内伸缩臂，其特征主要在于：
The inner telescopic boom is mainly characterized by:
1、内伸缩臂是由移动体套入固定体内，通过伸缩缸的伸缩使移动体伸出及缩回，从而达到自由伸缩的目的；
1. The inner telescopic arm is sleeved into the fixed body by the moving body, and the moving body extends and retracts through the expansion and contraction of the telescopic cylinder, so as to achieve the purpose of free expansion and contraction;
2、其结构只有一个固定体和一个或多个移动体，节为固定体，其余的是移动体，移动体按其大小先后顺序套入固定体内，原理是二节套入一节、三节套入二节….，通过伸缩缸使其有顺序伸出或缩回；内伸缩臂其结构较复杂、生产成本较高，一般设计成两节以上，用于深坑作业的抓取与扬土。其优点是增大了作业半径以及挖掘深度。
2. Its structure has only one fixed body and one or more moving bodies. The first section is the fixed body and the rest is the moving body. The moving body is sleeved into the fixed body according to its size order. The principle is that two sections are sleeved into one section and three sections are sleeved into two sections, Extend or retract the telescopic cylinder in sequence; The internal telescopic boom has complex structure and high production cost. It is generally designed into more than two sections for grasping and lifting soil in deep pit operation. Its advantage is that it increases the operation radius and excavation depth.