Beijing North Zhongyi Heavy Machinery Co., Ltd. : The working principle of truck crane
Description：Under the inside of the lifting arm there is a rotating drum, above which is a wire rope, which pull....
Under the inside of the lifting arm there is a rotating drum, above which is a wire rope, which pulls the previous lifting arm out through a pulley on the top of the next arm, and so on. When retracted, the reel is reversed to recover the wire rope, and the heavy arm retracted under the weight. This rotating drum is driven by a hydraulic motor, so you can see two tubing, but it should not be used as a cylinder.
In addition, there are some truck crane telescopic arm inside the installation of the plunger type cylinder, but this kind of application is rarely seen. Because the multi-stage plunger type cylinder is expensive, and the lifting arm will be elastic bending under load, which has a great impact on the life of the cylinder.
This paper is organized by Renxian Linyang Sealing Factory
