Crane classification according to the different structure

1, beam crane. Over a rectangular space in its operations, and more for workshops, warehouses, open yard loading and unloading goods, etc., a beam cranes, bridge cranes, gantry cranes, Cranes, carrying bridges.
① crane beam: beam cranes including single girder overhead cranes and double girder overhead crane
Single girder overhead crane bridge girder to use more of the word steel or steel type with steel composite section.  Hoist and trolley  often  Chain Block   electric hoist or hoist as  lift hoist  parts assembly.
Press the tray support and hanging two. The former car beam bridge crane along the orbit; latter along the suspension bridge crane under roof in the plant orbit. Single girder overhead crane of manual, electric two kinds. Manual single girder overhead crane agencies working speed is low, since the weight is also smaller, but their quality is small, easy to organize production, low cost, when used without the power handling of small, less demanding on the speed and productivity occasions. Manual single girder overhead crane with manual monorail running as car, hand pull hoist as lifting mechanism, the bridge from the main beam and end beam components. Girder generally use a single beam, side beam is formed by bending steel or steel plate welded into.
Electric single girder overhead crane working speed, high productivity compared to manual, from the weight as well. Electric single girder overhead crane from the bridge, traveling mechanism, electric hoist and electrical equipment and other components.
② bridge crane:
Overhead bridge crane is the bridge in orbit a bridge crane, also known as the crane. Bridge crane bridge laying on both sides along the elevated tracks run vertically, lifting trolley along the track on the bridge laying sideways to form a rectangle scope of work, you can take advantage of the space under the bridge lifting materials, not hampered by ground equipment.
Bridge crane is widely used in indoor and outdoor warehouses, factories, docks and open storage yard, etc.. Bridge crane bridge crane can be divided into ordinary, simple beam bridge crane bridge crane and metallurgical dedicated three.
General overhead cranes generally lifting trolley bridge operating agencies, bridge metal structures.  hoist and trolley  and the hoisting mechanism, trolley run institutions and small frame of three parts.
lift hoistincludes a motor, brake, reducer, drum and pulley. Motor through reducer, driving drum rotation, so that the wire rope around the drum or from a roll down to lift heavy loads. Small frame and mounting bracket is lifting mechanism and trolley run institutions and other parts of the rack, usually welded structure.
2, jib cranes (jib crane)
Jib crane with column type, wall-mounted, balancing crane three forms.
① column jib crane is the cantilever can be fixed on the base around a fixed column rotation, or a rigid connection between the cantilever and rotary column, the base support with respect to the vertical centerline of the inner rotating cantilever composed by columns and cantilever cranes. It is suitable for lifting small, round or operating services sector occasions. Generally used for machine tools and other artifacts chucking and handling.
    Column jib crane jib crane column to use more electric chain hoist as lifting mechanism and the operating agencies, and less use of wire rope hoist and chain hoists. Job rotation and horizontal movement to use more manual, only in greater weight when starting the use of electric.
② wall crane is fixed on the wall jib crane, or you can along the wall or other support structure on an elevated track running boom cranes.
Wall line of cranes using the occasion of a larger span, building height larger plant or warehouse, close to the wall near the frequent lifting operations at the most suitable. Wall with the top of the line multi-crane or bridge crane beam with the use of near a wall in a rectangular space at the service responsible for lifting small light objects by a large beam or bridge crane commitment.
③ balance crane known as balance suspended, it is the use of four-bar linkage principle so that the load and the counterweight constitutes a balanced system, you can use a variety spreader flexible and easily lifting loads in three-dimensional space. Balance crane lightweight and flexible, it is an ideal lifting small items of lifting equipment, are widely used in factory floor machine loading and unloading, in-process, automatic line, the production line of the workpiece, sand box lifting, parts assembly, as well as railway stations, docks, warehouses and other occasions
3, gantry cranes
Gantry crane gantry structure is generally based on the form of the main beam form spreader form classification.
Sub-frame structure by
(A) full gantry crane: the main beam without overhang, the car performed in the main span.
(B) semi-gantry cranes: legs are height difference, according to the civil use of space requirements.
(C) double cantilever gantry crane: The most common form of a structure, the structure of the force and the effective use of site area is reasonable.
(D) single cantilever gantry crane: This structure is often limited due to the venue being used.
Press the main beam structure in the form of
(A) single girder gantry crane
Single girder gantry crane cantilever simple structure, easy installation, the quality of their small, mostly off-track girder box-shaped frame structure. And double-girder gantry crane compared to the overall stiffness is weaker. Therefore, when the starting weight Q ≤ 50t, span S ≤ 35m, we can use this form. Single girder crane main gate door legs with L-type and C-type two forms. L-type manufacturing, easy installation, good force conditions , the quality of their small, but, lifting cargo space through the legs at a relatively small number. C shaped legs made of inclined or curved shape, aimed at a larger horizontal space to make the goods pass the feet.
(B) double girder overhead crane
Double girder overhead crane carrying capacity, span, overall stability, variety, but the quality of their starting weight with the same single-girder gantry crane compared to the bigger, the cost is higher. According to the main beam structure is different, can be divided into box girders and trusses in two forms. Now more commonly used box-shaped structure.