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The Working Principle Of Truck Mounted Crane
- Aug 31, 2017 -

Underneath the boom, there is a rotating reel, which is wrapped around the wire rope, and the wire rope pulls the upper lifting arm out of the pulley on the top of the next arm, and so on. When retracted, the reel is reversed to reclaim the wire rope, and the lifting arm is retracted in the next time. This rotating reel is driven by a hydraulic motor, so you can see two tubing, but don't use it as an oil cylinder.

In addition, there are some car crane telescopic arms fitted with a set of plunger-type cylinder, but this application is very rare. Because of the high cost of multistage plunger type cylinder, and the elastic bending occurs when the boom is loaded, it has great effect on the life of the oil cylinder.