What is a crane

    A crane is a  hoist crane  is a for loop, intermittent movement of machinery. A work cycle include: extract extract means to put items from the lift, and then move to the designated place lower level items, followed by a reverse movement, so extract unit returns to original position for the next cycle.
       Crane hoisting mechanism mainly run agencies, luffing, slewing mechanism and metal structures:

       Crane hoisting mechanism is the basic work of institutions, mostly by hanging system and winch components, there are also lifting heavy objects through the hydraulic system.

       Operating agencies to transport heavy loads or adjust the level of vertical  overhead bridge crane  working position, usually by the motor, speed reducer, brake and wheel components.

       Luffing jib crane in only with, the amplitude decreases when the jib looked up, bent over when the amplitude increases, the amplitude of balanced and unbalanced luffing two kinds.

       Rotating mechanism for rotating the boom is driven by the device and the rotary bearing device component.

        Steel crane  metal structure is the skeleton, the main carrier such as bridge, boom and mast for box-shaped structure or truss structure, but also for the web structure, and some can be used as a steel support beam.