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Due to the integration of materials, making the role of cranes more and more important, nowadays, the development trend of cranes is high-speed, large-scale, intelligent and automated. The role of the gantry crane is getting bigger and bigger, we need to constantly improve it, so that its performance is getting better and better, and can meet the needs of more customers.

Gantry crane is a heavy mechanical equipment, and its working conditions are very heavy, we have to guarantee that it can have enough strength, rigidity and stability in the load complex and changing conditions, it is necessary to choose a crane that can carry the whole crane and connect the metal skeleton, so that there can be enough safety. The safe working life of the gantry crane is mainly determined by its metal skeleton, as long as the metal skeleton is not destroyed, it can be used safely, other devices and parts will not affect its life, but once its metal skeleton is destroyed, it will bring serious consequences to the gantry crane.

Metal structure form of gantry crane

Gantry crane metal structure according to the different force characteristics, we divided it into three categories, one is the beam and truss is to withstand the main components of the bending moment; the second is the main components of the column is to withstand the pressure; the third is the pressure and bending components, mainly used to both withstand the pressure and withstand the bending moment of the components. We can according to these components of the force mode and structural dimensions, the metal structure of the gantry crane is designed into structural type, solid web type and mixed type. Below we mainly talk about solid web members. The so-called solid web member, which is mainly composed of steel plate, the main applicable occasions is the load is larger and smaller dimensions. Its advantage is that it can use automatic welding, simple manufacturing, high fatigue strength, very small stress concentration, wide range of applications, installation and maintenance is very convenient, but at the same time it also has the disadvantage of self-importance and poor rigidity.

Gantry crane running mechanism composition

Running mechanism, refers to the crane to do horizontal movement of the mechanism, it is mainly used to move goods horizontally, rail running mechanism refers to the movement of the mechanism in the special track, it is characterized by running resistance is small, the load is large, the disadvantage is that the scope of movement is limited, and those trackless running mechanism, they can move on the ordinary road, with a wider range of operations. The running mechanism of the crane is mainly composed of driving device, running support device and safety device. The driving device includes the three parts of the prime mover and transmission device and brake, the running support device consists of the rail and steel wheels, the safety device includes the wind anti-slip device, travel limit switch, buffer and rail end stops, etc. These devices can effectively avoid the trolley derailment and prevent the crane from being blown by the strong winds leading to overturning.

Working principle of gantry crane hoisting mechanism

The electric motor of the crane is connected together through the coupling and reducer, and it works through the rotation of the low-speed shaft of the reducer to make the reel and the hook combined with the wire rope and so on. When the motor works, it rotates in different positive and negative directions to transfer the motion to the reel, and then the reel rolls in or releases the wire rope to make the hook hoist the weight up or down, and the basic principle is that the rotation of the motor is converted into the lifting and lowering motion of the weight. When braking is performed in the event of a sudden power failure, the load will stop at the specified position. When the hoist reaches the limit position, it will touch the limiter to stop the movement of the hook.