Investigation of telescopic boom with single cylinder and pinning system for truck crane

Structure of telescopic boom is becoming increasingly complicated, since truck crane with excellent performance, larger-ton as well as intelligence has dominated the tendency of development, enterprises home and abroad attach importance to the investigation of telescopic boom and some achievements have been obtained. So far, structure of telescopic boom with single cylinder and pinning system equipped with high intelligence and reliable performance represents the newest technology. Targeted with telescopic boom with single cylinder and pinning system, the paper builds the model of the whole telescopic boom. Secondly, the paper investigates the statics of telescopic boom, which provides strong proof for the optimization design of telescopic boom, more specifically, at the background of crane with lifting competence 25 ton(rating load), contour plot of press and displacement for each boom in all-extended condition are also studied, which contributes to strengthening design of slide-pad attached to moving boom and also confirms location of regional stress concentration for each boom. Finally, the cross-section size for the first telescopic boom is optimized by using optimization toolbox provided by MATLAB software which brings about the reducing gross weight of the whole system.