汽车起重机部分操作知识——吊臂伸缩操作：
Some operation knowledge of truck crane - boom telescopic operation:
吊臂伸缩操作首先了解一下吊臂伸缩机构，它是有基本臂（一节臂）、二节臂、三节臂、四节臂、五节臂、六节臂等，（主臂）。一节副臂、二节副臂、吊臂滑轮、臂端滑轮、基本臂上装有卷线盒、力矩限制器的角度传感器、吊臂长度传感器、高度限位报警开关，扭王块模具 高铁遮板模具 阶梯护坡模具 拱形护坡模具 卵形槽模具 保定室内设计培训 保定平面设计培训吊臂内有伸缩油缸、粗细拉索、拉索绳排、导向滑轮、各吊臂之间上、下、左、右有不等的导向滑块等组成。上车操纵室普型产品左边第二个手柄为伸缩控制手柄，手柄向前推为吊臂外伸，手柄向内拉为吊臂缩回（K型产品先按下变幅伸缩转换开关后，右手柄向右扳为吊臂外伸，手柄向左扳为吊臂缩回）。两种产品手柄回到中位为伸缩停止运动，如伸缩需要快速运动可加大油门增快速度。
Boom telescopic operation first understand the boom telescopic mechanism, which has basic boom (one boom), two boom, three boom, four boom, five boom, six boom, etc. (main boom). One jib, two jibs, boom pulley, boom end pulley, angle sensor with reel box and moment limiter, boom length sensor and height limit alarm switch are installed on the basic boom. The boom is composed of telescopic oil cylinder, thick and thin cable, cable rope row, guide pulley, and unequal guide sliding blocks between each boom. The second handle on the left of the common product in the upper control room is the telescopic control handle. Push the handle forward to extend the boom, and pull the handle inward to retract the boom (for K-type product, press the luffing telescopic change-over switch first, pull the right handle to the right to extend the boom, and pull the handle to the left to retract the boom). When the handles of the two products return to the middle position, the telescopic movement stops. If the telescopic movement needs fast movement, the accelerator can be increased to increase the speed.