Introduce various types of cranes

There are different types of cranes, functional and structural characteristics are different types of  overhead bridge crane  are the following:
One, light and small crane
Small light lifting equipment is characterized by a lightweight, compact, simple operation, the operating range of the projector to point, line oriented. Light, compact lifting equipment, generally only a lifting mechanism, which only allows for a single heavy lifting movement. Fall into this category are: jack, pulley, hand (gas, electricity) moving hoists, winches and so on.
Two, bridge cranes
Bridge crane can be characterized so hang on a hook or other heavy objects on the device extracts the spatial vertically or horizontally to achieve migration.  hoist gantry crane  include: hoisting mechanism, large trolley agency. Rely on these institutions with the action, can make the weight in a certain cubic space lifting and handling.
Third, jib crane
Jib cranes include: hoisting mechanism, luffing mechanism, rotating mechanism. Rely on these institutions with the action, can in some heavy lifting and handling within the cylindrical space. Jib crane mounted on many vehicles or other forms of transport, and thus constitutes a rotating jib crane operation.
Four, lifts
Is characterized by a heavy lift or extract unit can only lift along the rails. Although only a lifting mechanism lifts, but the lift, there are many other appurtenances, so constitute a separate category, which includes: Lifts ship lift and so on. There are a variety crane classification. For example, according to extract device and use classification, crane hook, grab hoist crane s, electromagnetic crane, metallurgical cranes, stacker cranes, container cranes and rescue cranes.