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Industrial overhead crane are lifting equipment that traverses materials in the workshop, warehouse and stockyard. Because its two ends are located on tall cement columns or metal brackets, they are shaped like bridges. The bridge of the industrial overhead crane runs longitudinally along the rails laid on the elevated sides of the bridge, which can make full use of the space under the bridge to lift the materials without being obstructed by the ground equipment. It is the most widely used and largest number of lifting appliances.
A type of industrial overhead crane that runs on an elevated rail, also known as a crane. The bridge of the industrial overhead crane runs longitudinally along the rails laid on the elevated rails on both sides. The lifting trolley runs transversely along the track laid on the bridge to form a rectangular working range, so that the space under the bridge can be fully utilized to lift the materials. Obstructed by ground equipment. This kind of crane is widely used in indoor and outdoor warehouses, factories, docks and open storage yards.
Bridge crane generally by the bridge (also known as cart).Lifting mechanism, trolley, trolley shifting mechanism, control room, trolley conductive device (auxiliary sliding line), crane main power conductive device (main sliding line) and other parts.
The bridge frame is the basic component of the bridge crane.Main beam span frame in the span above, there are box, dismember, web, round pipe and other structural forms.The end beam is connected at both ends of the main beam, a walking table is installed outside the two main beams, and a safety railing is provided.A large vehicle shifting mechanism is installed on the platform on one side of the cab, and a device to supply power to the electric equipment of the trolley is installed on the platform on the other side, that is, an auxiliary sliding line.There is a guide rail over the main beam for the car to move.The whole bridge crane moves along the guide rail of the length direction of the workshop under the drag of the cart moving mechanism.
Wagon shifting mechanism
The cart shifting mechanism is composed of the cart driving motor, drive shaft, reducer, wheel and brake.
Car shifting mechanism
The trolley is placed on the bridge guide rail, which can move along the width of the workshop.The trolley is mainly made of welded steel plate, composed of trolley frame and trolley shifting mechanism and lifting mechanism.
The car moving mechanism is composed of car motor, brake, coupling, reducer and wheel.The trolley motor drives the trolley's driving wheel through the reducer, and drives the trolley along the guide rail. Because the trolley's driving wheel is close to each other, it is driven by an electric motor.
There are two transmission forms of trolley shift mechanism: one is the reducer in the middle of two active wheels;The other is a gearbox mounted on the side of the car.The gearbox is installed in the middle of two driving wheels, so that the torque borne by the drive shaft is more uniform.The speed reducer is installed on the side of the car, which makes the installation and maintenance more convenient.
The lifting mechanism consists of a lifting motor, a reducer, a reel, a brake, and the like. The lifting motor is connected to the reducer via the coupling, the brake wheel, the output shaft of the reducer is connected with the reel of the wound wire rope, and the other end of the wire rope is equipped with a hook. When the reel rotates, the hook is wound with the wire rope. The winding or unwinding on the drum rises or falls. For cranes with a lifting capacity of 15t and above, there are two sets of lifting mechanisms, namely the main hook and the auxiliary hook.
It can be seen that the weight moves up and down along the reel on the hook; as the car gets left and right movement in the width direction of the workshop, it can move back and forth with the cart in the length direction of the workshop. In this way, the movement of the heavy objects in the vertical, horizontal and vertical directions can be realized, and the heavy objects can be moved to any position in the workshop to complete the lifting and transportation task.
The control room is the pod that controls the crane, also known as the cab. There are large and small car transfer mechanism control devices, lifting mechanism control devices and crane protection devices in the control room.
The control room is usually fixed at one end of the main beam, and a few are mounted under the trolley to move with the trolley. Above the control room, there is a hatch leading to the walkway for maintenance personnel to access the machinery and electrical equipment of the big and small cars.
There are three forms of motion for bridge cranes:
(1) The overhead crane is driven by the cart motor to move longitudinally back and forth along the two sides of the factory floor.
(2) The trolley and lifting mechanism on the main beam of the cart are driven by the trolley motor to move laterally left and right along the main beam rail of the bridge.
(3) The lifting motor (main hook, auxiliary hook) drives the heavy object to make vertical lifting movement.