Jinan professional 100 tons crane rental manufacturers - Shandong Rongsheng Limited provide crane hoisting crane structure includes hoisting mechanism, traveling mechanism, luffing mechanism, slewing mechanism and metal structure. Hoisting mechanism is the basic working body of the crane, mostly by hanging system and winch composition, but also lift weights through the hydraulic system. Operation mechanism for horizontal transport of heavy or longitudinal adjustment of the position of the crane's work generally consists of motor, reducer, brake and wheel components. Luffing mechanism is equipped with only the jib crane, when the jib looked amplitude decreases, the amplitude increases when bent, sub balanced and unbalanced luffing luffing two. Boom slewing mechanism for causing rotation is determined by the drive means and the rotary bearing device. Metal structure is the skeleton of a crane, the main carrier such as bridge, boom and mast can be box-shaped structure or truss structure, but also for the web structure, and some can be used as a steel support beam.