According to the lifting properties: mobile crane, tower crane, mast crane.
According to the structure form, the crane is mainly divided into light and small lifting equipment, bridge type (bridge type, gantry crane), arm type (self-propelled, tower type, gantry type, railway type, floating boat type, mast type crane), cable type.
1. Light and small lifting equipment
Light and small lifting equipment is characterized by light, compact structure, simple action, operating scope projection to point, line based. Light, small lifting equipment, generally only one lifting mechanism, it can only make the weight for a single lifting movement. Belong to this category: jack, block, hand (gas, electric) hoist, winch, etc. Electric hoist is often equipped with a running trolley and a metal frame to expand the scope of operation.
< electric hoist >
CD1, MD1 series wire rope electric hoist is an improved product based on the original CD and MD. It has the characteristics of compact structure, lightweight, safe and reliable, universal degree of parts, strong interchangeability, high lifting capacity, easy maintenance and so on, is widely used, popular light lifting equipment.
The hoist has two types: fixed type and trolley type. The fixed type can be divided into FOUR types: A1, A2, A3 and A4 according to the different positions of the fixed feet on the top, bottom, left and right, which can be directly installed on the frame for use. The trolley type has the operation function and can be installed on the track for use. CD1 is single-speed lift, MD1 is normal speed and slow speed lift.
2. Bridge crane
It can be used for loading and unloading of goods in workshops, warehouses, open storage yards and other places, including beam cranes, bridge cranes, gantry cranes, cable cranes, carrier Bridges and so on.
(1) beam crane: beam crane mainly includes single beam bridge crane and double beam bridge crane
The main girder of single girder bridge crane adopts I-shaped steel or the combined section of steel and steel plate. The lifting trolley is usually assembled by hand hoist, electric hoist or hoist as lifting mechanism parts.
According to the bridge is divided into two kinds of support and suspension. The former bridge runs along the crane rail on the vehicle beam; The bridge of the latter runs along a crane track suspended under the roof of the factory. Single beam bridge crane part dynamic, electric two. Manual single beam bridge crane each mechanism working speed is low, the lifting weight is small, but its own mass is small, easy to organize production, low cost, suitable for no power after handling is not large, the speed and productivity requirements are not high occasions. Manual single beam bridge crane adopts manual monorail trolley as the running trolley, with hand hoist as the lifting mechanism, the bridge is composed of main beam and end beam. The main beam is generally made of a single I-beam, and the end beam is welded with shaped steel or bending steel plate.
Electric single beam bridge crane working speed, productivity is higher than manual, lifting weight is larger. Electric single beam bridge crane is composed of bridge frame, trolley running mechanism, electric hoist and electrical equipment.
(2) Bridge crane:
Bridge crane is a bridge crane running on the elevated track, also known as the roof crane. Bridge crane bridge along the laid on both sides of the elevated rail longitudinal operation, lifting trolley along the laid on the bridge rail transverse operation, constitute a rectangular working range, you can make full use of the space below the bridge lifting materials, not hindered by ground equipment.
The characteristics of bridge crane is that it can make the heavy objects hanging on the hook or other fetching devices realize vertical lifting or horizontal migration in space. Bridge crane includes: lifting mechanism, large and trolley running mechanism. Depending on the coordination of these mechanisms, heavy objects can be lifted and handled in a certain cube space. Bridge cranes, gantry cranes, loading and unloading Bridges, metallurgical bridge cranes, cable cranes, etc.
Bridge cranes are widely used in indoor and outdoor warehouses, factories, docks and open storage yards. Bridge cranes can be divided into ordinary bridge cranes, simple beam bridge cranes and metallurgical special bridge cranes three.
The common bridge crane is generally composed of lifting trolley, bridge running mechanism and bridge metal structure. The lifting trolley is composed of lifting mechanism, trolley running mechanism and trolley frame.
The lifting mechanism includes an electric motor, a brake, a reducer, a drum and a pulley block. The motor drives the drum to rotate through the reducer, so that the wire rope is wound on the drum or put down from the drum to lift the weight. Trolley frame is a frame for supporting and installing lifting mechanism and trolley running mechanism and other components, usually welded structure.