The telescopic device of self loading mixer is a special mechanism used to meet different construction requirements by changing the length of its telescopic pipe and then controlling the inclination angle or height of the discharge chute. Its structural forms include spring telescopic type, hydraulic driving type and hand screw telescopic type.
1.弹簧伸缩式伸缩装配。弹簧伸缩式伸缩装配首要由内管、外管、伸缩弹簧和限位装配等构成。该布局利用伸缩弹簧助力道理，在停止伸长功课时起到助力感化，在特定水平上下降了操控者的休息强度；在停止缩短功课时需降服弹簧阻力，操控性下降。弹簧伸缩式具备布局简略，本钱高等长处，但存在休息强度较高，不易操纵等错误谬误。
1. Spring telescopic device. The spring telescopic device is mainly composed of inner tube, outer tube, telescopic spring and limiting device. The structure uses the principle of telescopic spring to assist in the extension operation, which reduces the labor intensity of the operator to a certain extent; The spring resistance should be overcome during the contraction operation, and the controllability is reduced. The spring telescopic type has the advantages of simple structure and low cost, but it has the disadvantages of high labor intensity and difficult operation.
2.手摇丝杆伸缩式伸缩装配。手摇丝杆伸缩式伸缩装配首要有外管、内管、丝杠、丝母和轴承等构成。该机构利用螺旋副通报活动道理，螺母与螺杆绝对位移实现布局的伸缩。与以上2种情势比拟，手摇丝杆伸缩式具备布局简略、便于操纵、休息强度高等长处，故在自上料打金鱼 利用较为普遍。
2. Hand screw telescopic device. Hand screw telescopic device mainly consists of outer tube, inner tube, screw, screw nut and bearing. The mechanism uses the principle of transmission motion of screw pair, and the relative displacement of nut and screw realizes the expansion and contraction of the structure. Compared with the above two forms, the hand screw telescopic type has the advantages of simple structure, easy operation and low labor intensity, so it is widely used in the self feeding mixer.
3.液压驱动式伸缩装配。液压驱动式伸缩装配经由进程液压能驱动液压缸伸缩实现布局的伸缩，主动化水平获得进步，下降了休息强度，但需装备自力的液压驱动体系，进步了制作本钱。
3. Hydraulic driven telescopic device. The hydraulic driven telescopic device can drive the hydraulic cylinder to expand and expand to complete the expansion and contraction of the structure. The degree of automation is improved and the labor intensity is reduced. However, it needs to be equipped with an independent hydraulic drive system to increase the manufacturing cost.