Crane is a certain scope and level of vertical lifting to carry a heavy load of multi-action lifting appliances, also known as cranes, is a for recycling, intermittent mechanical movement. A working cycle including: extract from the plant extract to bring the goods, and then move to designated locations levels down items, and then reverse campaign to extract device back to the original position for the next cycle. It is mainly used to being lifted into items with appropriate spreader can also be lifted after the bulk materials and liquid materials.
Typically, crane hoisting mechanism by (up and down movement of goods), run institutions (to enable mobile crane), Luffing agencies and rotary bodies (so that the level of articles for Mobile), together with metal bodies, power plant, manipulation control and the necessary combination of assistive devices.
Usually divided into crane jib type crane structure and bridge cranes. Jib cranes, including tower cranes, portal cranes, floating cranes, self-propelled crane, from the composition of the mast and boom crane mast, wall running along the wall line crane and mounted on the deck of a ship deck cranes, etc.; Bridge type of crane including the bridge crane, gantry cranes, transportation, such as bridges and cable crane. Cranes can also be use, drive ways and mobility features such as classification.
In the bridge used in lifting machinery, in accordance with its structure and properties vary, but generally can be divided into small light lifting equipment, bridge-type crane and jib crane type three categories. Light small lifting equipment such as: jack, hoist, winch, etc.. Such as the type of bridge crane beam cranes, gantry cranes and so on. The type of crane boom, such as fixed-slewing crane, tower crane, truck crane, tires, crawler cranes.
