Pontes rolantes
The Hoist Overhead Crane also called an EOT crane, is an efficient material handling lifting equipment with a structural design that provides strong load carrying capacity and flexible operating performance to meet the needs of various industrial environments. The electric hoist, as the hoisting mechanism, is an important part of the LH type hoist overhead crane, which can move freely along the track to realize the handling of goods in different positions. The electric hoist has the function of lifting, and the lifting and lowering of goods is accomplished through the drum and wire rope.
The core part of the electric hoist overhead crane is the bridge frame, which is composed of two main girders and end girders. The box structure bridge frame enhances the rigidity of the whole and ensures stability during the operation. The main beams are equipped with rails for the lateral movement of the electric hoist to ensure the smooth operation of the electric hoist on the bridge, so that it can accurately move to the required position for lifting and handling of goods.
To meet the requirements of different lifting needs and working scenes, the double girder Overhead bridge Crane is divided into LH-type double girder overhead crane and NLH-type European double girder overhead crane.
LH type double girder overhead crane is usually equipped with a wire rope electric hoist with fast running speed, which is suitable for occasions of frequent operation, but the requirement of running accuracy is low. Its lifting capacity ranges from 1 ton to 20 tons, which is suitable for the handling and lifting of light materials. With a simple structure and low overall height, it is suitable for environments with limited plant height, but its stability is slightly weaker. LH-type hoist overhead cranes have a low cost, which is ideal for customers with limited budgets and small lifting needs, and are widely used in scenarios such as machining workshops, assembly lines, and small warehouses.
NLH European Type Double Girder Overhead Cranes have a higher load capacity, ranging from 5 tons to 32 tons, suitable for medium or heavy material handling. Equipped with FEM standard double-speed or inverter-controlled European electric hoist, the motor is ABB, the reducer uses SEW, and the electrical components use Siemens. The running speed is adjustable, and the operation is precise to meet the demand for high stability and precision operation. Its structural design focuses on durability and is suitable for high-intensity and long-term working environments.NLH cranes can also be equipped with a remote control or automation control system, which is more powerful and suitable for heavy equipment installation, steel processing, and logistics and warehousing scenarios. Although the cost is higher, its excellent performance and cost-effectiveness are more suitable for customers who have higher requirements for equipment.
The hoist overhead crane is composed of key components such as the bridge, hoist mechanism, trolley, end trucks (traveling mechanism), runway beams & rails, electrical control system, braking system, and hook block. Below are the main parts and functions:
Bridge: The primary horizontal beam that spans the work area, supporting the hoist and trolley.
Hoist: The lifting mechanism that raises and lowers loads. Available in electric chain hoists or wire rope hoists. Equipped with a motor, brake, and gearbox for controlled lifting. and can be equipped with variable speed control for precision handling.
Trolley: Moves the hoist horizontally along the bridge. Can be manual, motorized, or geared for different operational needs. Often paired with limit switches to prevent over-travel.
Runway Beams & Rails: Support the crane structure and guide its movement.
End Trucks: Located at each end of the bridge, housing the wheels for movement.
Controls & Electrical System: Allows the operator to control crane movements. Equipped pendant controls (push-button or radio remote).
Variable frequency drives (VFDs) for smooth acceleration/deceleration.
Hook Block & Load Handling Attachments: Connects to the load for lifting. Forged steel hooks with safety latches. Can be replaced with magnets, grabs, or specialized lifting devices.
The design of hoist overhead crane variations is tailored to different industrial applications (e.g., workshops, foundries, warehouses). If you want details on a specific type of overhead crane (e.g., single-girder, double-girder, gantry).
The following two videos are about the components of the Hoist Overhead Crane and the customer site. Please click to view the details.
| Modelo | Ponte rolante de viga dupla tipo LH | ||||
| Capacidade (tonelada) | 5 | 10 | 16/3 | 20/5 | 32/5 |
| Alcance (m) | 10.5-31.5 | ||||
| Altura de elevação (m) | 6/9/12/18/Outra altura | ||||
| Velocidade de deslocação do carrinho (m/min) | 20 | ||||
| Modelo do guincho elétrico | CD1(MD1) | ||||
| Velocidade de deslocação da cabina (m/min) | 20 | ||||
| Velocidade de deslocação da grua - controlo no solo (m/min) | 20 | ||||
| Classe operária (FEM/ISO) | A3/A4 | ||||
| Fonte de energia | 3 Fase A.C.50HZ 380V | ||||
| Capacidade de elevação | T | 5 | 10 | 16/3.2 | 20/5 | 32/5 | 50/10 | ||
| Span | m | 10.5-31.5 | |||||||
| Velocidade | Main Hook Lifting | A5 | m/min | 11.3 | 8.5 | 7.9 | 7.2 | 7.5 | 5.9 |
| A6 | 15.6 | 13.3 | 13 | 12.3 | 9.5 | 7.8 | |||
| Aux. Hook Lifting | 16.7 | 19.5 | 19.5 | 10.4 | |||||
| Traveling with Crab | 37.2 | 43.8 | 44.6 | 44.6 | 42.4 | 38.5 | |||
| Cabin, remote control; ground handle | A5 | 89.8/91.8 | 90.7/91.9 /84.7 | 84.7/87.6 | 84.7/87.6 | 87/74.2 | 74.6 | ||
| A6 | 92.7/93.7 | 115.6/116 /112.5 | 112.5/101.4 | 112.5/101.4 | 101.4/101.8 | 75/76.6 | |||
| Operational Model | Cabin, remote control, ground handle | ||||||||
| Dever de trabalho | A5,A6 | ||||||||
| Fonte de alimentação | Three-phase A.C. 380V, 50Hz or customized | ||||||||
Fabrico: Suitable for workshops, warehouses, and production lines, and can quickly and accurately lift and move various parts, raw materials, and finished products.
Setor da logística: Efficiently complete the loading and unloading of containers, pallets, and large cargo, thereby improving logistics efficiency and reducing loading and unloading costs.
Construction industry: To lift construction materials such as steel bars, prefabricated components, etc., and install heavy equipment. This not only improves construction efficiency but also increases the safety of construction sites.
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