The structure of the crane is classified

Answer:

In the driver mode: one type of drive, which drives the active wheel on both sides with an electric motor drive the long drive shaft. The other type is driven by an electric motor, which is driven separately by the active wheel on both sides. More medium and small bridge crane brake, reducer and motor group synthesis drive mode, the integration of the "triad" big lifting weight of ordinary bridge crane for ease of installation and adjustment, drive often adopt universal coupling. According to structure form, the crane is mainly divided into small light lifting equipment, bridge frame (bridge, gantry crane), arm posture (self-propelled, tower, portal crane, rail, pontoon type, mast crane), cable type.

Girder crane: the beam crane mainly includes single beam bridge crane and double beam bridge crane The main beam of the single beam bridge crane bridge is made of the composite section of steel and steel. The lifting car is often assembled from a hoist, an electric gourd, or a hoist with a hoist. There are two kinds of supporting and hanging type in the bridge. The crane track of the former bridge over the beam of the car; The bridge of the latter is in a crane track suspended under the frame of the workshop. Single beam bridge crane breakups, electric two kinds. Manual single-beam bridge crane institutions working speed is low, the weight is small, but its quality is small, easy to organize production, low cost, suitable for no power after carrying amount is not big, requirements for speed and productivity is not high. Manual single beam bridge crane adopts manual monorail car as the running car, and as the lifting mechanism, the bridge is made up of the main beam and the beam. The main beam is usually made of single piece of steel, and the end beam is welded with a shape or steel plate. The electric single beam bridge crane works faster, the productivity is more manual and the weight is larger. Electric single-beam bridge crane is operated by bridge frame and large car

Light lifting equipment Light and small hoisting equipment is characterized by light, compact structure, simple action, and a range of projective points and lines. Light, small lifting equipment, usually only one lift mechanism, it can only make heavy weight to make a single lift movement. Among them: jack, block, hand (gas, electricity), hoist, etc. Electric gourds are often fitted with running cars and metal frames to expand the scope of the work. Electric hoist The CD1 and MD1 series of steel wire rope electric hoist are based on the original CD and MD type. It has compact structure, lightweight, safe and reliable, large parts of general degree, strong interchangeability, high lifting capacity, maintenance is convenient wait for a characteristic, is widely used, popular light lifting equipment. The gourd has a fixed and small car type. Fixed by the fixed leg on the up, down, left, right location is divided into different A1, A2, A3, A4 type, can be directly installed on the frame is used, the car has run function, can be installed on the track. Bridge crane

Lifting machinery used in bridge engineering, according to its structure and properties of different, general can be divided into small light lifting equipment, bridge type crane hoisting machinery and boom type, cable crane four categories. Light and small lifting equipment such as jack, pneumatic gourd, electric gourd, balance gourd, winch and so on. Bridge type crane machine such as beam crane and so on. The arm frame type crane, such as fixed revolving crane, tower crane, truck crane, tyre crane, crawler crane, etc. A cable crane is like a lift. Moving crane, tower crane, mast crane.

(1) the gantry crane is all: the non-main beam, the main span of the car. (2) semi-portal crane: the legs have a high degree of difference and can be used for the civil request of the site. (3) double cantilever gantry crane: the most common type of structure, the structure and scale of the unit is reasonable. (4) single cantilever gantry crane: this structure is usually chosen because of the limits of the field. Single-girder crane girder structure divided by (1) single beam gantry crane cantilever structure is simple, manufacture and installation is convenient, its quality is small, the railway box girder frame structure. The overall stiffness is weaker than the double girder crane. So when you start to weigh Q is less than 50 tons, and S is less than or equal to 35 meters, we can use this form. Single beam crane main door leg is type L and C type. L-type production and convenience, good mechanical state installation type, its quality is small, but by lifting the volume of smaller freight department in the leg space. The aim is to have more horizontal space, allowing the goods to be tilted or bent in the shape of the legs. (2) double beam carrying capacity of the double beam bridge crane, large span, the overall stability, varieties, quality and the same, but from the weight of its own single-girder gantry crane, compared to a few bigger, cost is higher also. According to the structure of the main beam, it can be divided into box girders and truss forms. The box structure is more commonly used.