SEVENCRANE underhung bridge crane is a lifting equipment that is placed horizontally over workshops, warehouses and yards for lifting materials. Because its two ends are located on tall cement pillars or metal supports, it looks like a bridge. The bridge of the bridge crane runs longitudinally along the tracks laid on the elevated structures on both sides, making full use of the space under the bridge to lift materials without being hindered by ground equipment. It is the most widely used and most numerous type of lifting machinery.
An industrial underhung bridge crane whose bridge frame runs on an elevated track is also called the overhead crane. The bridge frame of the bridge crane runs longitudinally along the tracks laid on the elevated bridges on both sides, and the lifting trolley runs transversely along the tracks laid on the bridge frame, forming a rectangular working range, so that the space under the bridge frame can be fully utilized to lift materials. Hindered by ground equipment. This kind of crane is widely used in indoor and outdoor warehouses, factories, docks and open-air storage yards.
Warehouse underhung bridge crane cost generally consist of a bridge frame (also called a trolley). It is composed of lifting mechanism, trolley and trolley transfer mechanism, control room, trolley conductive device (auxiliary slide wire), crane main power conductive device (main slide wire) and other parts.
Bridge Frame
The bridge frame is the basic component of the bridge crane, which consists of the main beam, end beam, walking platform and other parts. The main beam spans over the spans and has structural forms such as box, truss, web, and round tube. There are end beams connected to both ends of the main beam, and there are walking platforms and safety railings on the outside of the two main beams. The carriage moving mechanism is installed on the walking platform on one side of the cab, and the device that supplies power to the electrical equipment of the trolley, that is, the auxiliary slide line, is installed on the walking platform on the other side. Guide rails are laid above the main beam for the trolley to move. The entire bridge crane is dragged by the cart moving mechanism and moves along the guide rail along the length of the workshop.
Car Transfer Mechanism
The trolley is placed on the bridge guide rail and can move along the width of the workshop. The trolley is mainly made of welded steel plates and consists of a trolley frame, a trolley moving mechanism and a lifting mechanism on it.
The trolley moving mechanism is composed of trolley motor, brake, coupling, reducer and wheels. The trolley motor drives the trolley’s driving wheel through the reducer, and drags the trolley to move along the guide rail. Since the trolley’s driving wheels are close to each other, they are driven by one motor.
There are two transmission forms of the trolley’s moving mechanism: one is that the reduction box is in the middle of the two driving wheels; the other is that the reduction gearbox is installed on one side of the trolley. The reduction box is installed between the two driving wheels, so that the torque borne by the drive shaft is relatively uniform; the reduction box is installed on one side of the trolley, making installation and maintenance more convenient.
Improve the Organization
The lifting mechanism consists of a lifting motor, reducer, reel, brake, etc. The lifting motor is connected to the reducer through a coupling, a brake wheel, and the output shaft of the reducer is connected to the drum around which the wire rope is wound. A hook is installed at the other end of the wire rope. When the drum rotates, the hook is wound along with the wire rope. It rises or falls by winding or releasing on the barrel. 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 on the hook moves up and down as the drum rotates; as the trolley moves left and right in the width direction of the workshop, it can also move forward and backward with the cart in the length direction of the workshop. In this way, the movement of heavy objects in the vertical, horizontal and longitudinal directions can be realized, and the heavy objects can be moved to any position in the workshop to complete the lifting and transportation tasks.
Control Room
The control room is the pod for operating the crane, also known as the cab. The control room contains large and small car transfer mechanism control devices, lifting mechanism control devices and crane protection devices, etc.
The control room is generally fixed at one end of the main beam, and there are also a few that are installed under the car and move with the car. There is a hatch leading to the walkway above the control room for maintenance personnel to get up and down when inspecting the mechanical and electrical equipment of large and small cars.
There are three types of movement of top 10 underhung bridge crane for sale:
(1) The underhung bridge crane is driven by the trolley motor to move longitudinally forward and backward along the tracks on both sides of the factory workshop.
(2) The trolley and the lifting mechanism on the main beam of the large trolley are driven by the trolley motor to move laterally left and right along the main beam track of the bridge.
(3) The lifting motor (main hook, auxiliary hook) drives the heavy object to perform vertical lifting movements.
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