10 Ton Overhead Bridge Crane

1. Bridge Girder(s)

The main horizontal beam(s) of the crane that support the trolley and span the width of the crane runway. In 10-ton cranes, this can be single or double girder.
2. End Trucks (End Carriages)

Located at both ends of the girder(s); these house wheels and motors that allow the crane to travel along the runway rails.

3.Hoist Unit

The hoist lifts and lowers the load. A wire rope hoist or electric chain hoist is typically used in 10-ton cranes.
4.Trolley Frame

Carries the hoist and allows it to travel horizontally along the girder. In single girder, it's a monorail trolley; in double girder, it's a top-running trolley.

5. Hook Block

The component attached to the end of the hoisting cable or chain used to attach the load. Includes safety latch.
6. Lifting Mechanism

Includes motor, gearbox, brake, drum, and wire rope/chain to perform the lifting operation.

7. Crane Travel Mechanism

Motors, wheels, and drives on the end trucks move the entire bridge along the runway system.
8. Trolley Travel Mechanism

Moves the hoist/trolley unit side-to-side along the bridge girder.

9. Electrical Control Panel

The main distribution and control center for power and operation logic. May include inverter (VFD), overload protection, etc.
10. Power Supply System

Festoon system, cable reel, or conductor bars supply power to the hoist and trolley.

11. Control System

Options: Push-button pendant control, wireless radio remote, or driver's cabin.
12. Limit Switches

Prevent over-travel of hoist and trolley in all directions.

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13. Braking Systems

Motors have electromagnetic or hydraulic brakes for precise stopping.
14. Buffers & End Stops

Mechanical bumpers on crane/trolley ends to absorb shock and prevent overrun.
15. Load Limiter (Overload Protection)

Detects excessive load and prevents operation above rated capacity.

Sketch

Main technical

The 10-ton capacity is ideal for medium-duty lifting, suitable for the following industries:

🏗️ 1. Manufacturing Plants

Transporting heavy components between workstations

Assembling machinery or large metal parts

🛠️ 2. Steel and Metal Workshops

Lifting steel plates, profiles, coils

Handling dies, molds, or fabrication assemblies

🏢 3. Warehouses & Logistics

Loading/unloading of goods and raw materials

Moving palletized products or bulky items

⚙️ 4. Equipment Maintenance Facilities

Removing/installing motors, gearboxes, pumps

Supporting repair of large industrial equipment

🚢 5. Shipyards and Marine Industry

Lifting engines or marine components

Assisting in shipbuilding and maintenance

🚆 6. Rail, Energy & Power Stations

Lifting transformers, turbines, or track equipment

Handling cable drums and switchgear

🧱 7. Construction & Precast Concrete Yards

Lifting precast beams, blocks, or panels

1) Design and planning
Determine technical parameters: Determine the crane's lifting capacity, span, lifting height, working speed and other technical parameters according to customer needs and the actual situation of the place of use. For example, the crane used for lifting goods in indoor warehouses may have a lifting capacity of less than 5 tons and a span of less than 20 meters; while the crane used for production and lifting in large factories may have a lifting capacity of tens or even hundreds of tons, and the span will increase accordingly.
Structural design: Carry out the structural design of the crane according to the technical parameters, including the design of the main beam, end beam, outrigger, walking mechanism, lifting mechanism, etc. Designers need to use mechanical principles and engineering experience to ensure the structural strength, stability and reliability of the crane. For example, the design of the main beam should take into account the maximum bending moment and shear force to be borne, and select the appropriate cross-sectional shape and size.
Material selection: Select appropriate raw materials according to design requirements, such as steel model and specifications. Generally, high-strength, low-alloy steel, such as Q345B, is selected to ensure the load-bearing capacity and durability of the crane. At the same time, for some key components, such as wire ropes and brakes, reliable quality and standard accessories should also be selected.
2) Cutting and pretreatment
Steel cutting: Cut the purchased steel according to the designed size. Common cutting methods include flame cutting, plasma cutting, laser cutting, etc. For example, flame cutting can be used for thicker steel plates; laser cutting can be used for thin plates or parts with higher precision requirements. The edges of the cut steel need to be polished to remove burrs and oxide scale.
Steel pretreatment: Pretreatment of the cut steel, including shot blasting and surface cleaning. Shot blasting can effectively remove impurities such as rust and oxide scale on the surface of steel, and improve the surface quality and coating effect of steel. The surface of the pretreated steel should have a certain degree of roughness to facilitate subsequent coating.
3) Welding and assembly
Main beam welding: Assemble the cut steel plates into the shape of the main beam and then weld them. The welding of the main beam generally adopts welding methods such as submerged arc welding or gas shielded welding to ensure the welding quality. During the welding process, attention should be paid to controlling welding deformation and adopting reasonable welding sequence and process parameters. For example, for a longer main beam, the segmented welding method can be used, first welding the middle part and then welding to both ends to reduce welding deformation.
End beam and outrigger welding: The end beam and outrigger are welded to the main beam to form the bridge structure of the crane. The welding of the end beam and outrigger should also pay attention to controlling the welding deformation and welding quality to ensure the overall strength and rigidity of the bridge.
Assembly of other components: Assemble other components such as the walking mechanism, lifting mechanism, and electrical system to the bridge. The installation of the walking mechanism and lifting mechanism should be carried out strictly in accordance with the design requirements to ensure its flexible operation, safety and reliability. The installation of the electrical system should pay attention to the rationality and safety of the wiring to avoid problems such as line confusion and short circuit.
4) Surface treatment and painting
Surface treatment: The assembled crane is subjected to surface treatment, such as shot blasting and phosphating treatment again to improve the adhesion of the coating. Phosphating treatment can form a phosphate film on the surface of the steel to enhance the corrosion resistance and wear resistance of the coating.
Painting: Painting operations are carried out according to customer requirements and environmental conditions. Painting generally includes multiple layers of coating such as primer and topcoat. Each layer of coating must be evenly applied and the thickness must meet the standard requirements. For example, the primer can be epoxy zinc-rich primer, which has good anti-corrosion performance; the topcoat can be polyurethane topcoat, which has good weather resistance and decorative properties. After painting, the crane should be placed in a well-ventilated environment to dry or dry.
5) Debugging and inspection
No-load debugging: After the crane is assembled, no-load debugging should be carried out first. Start each operating mechanism of the crane to check whether it is running normally, whether there is abnormal noise, whether the motor and brake are working reliably, etc. For example, check whether the wheels of the walking mechanism can rotate flexibly and whether the drum of the lifting mechanism can wind the wire rope normally.
Load debugging: After the no-load debugging is normal, load debugging is carried out. Gradually load according to a certain proportion of the rated load to check the performance of the crane under load. During the load debugging process, the stress, strain, deflection and other parameters of the crane should be monitored to ensure that they are within the allowable range. At the same time, it is also necessary to check whether the braking performance of the brake meets the requirements.
Safety device inspection: Inspect the safety devices of the crane, such as limit switches, overload protection devices, emergency brake devices, etc. These safety devices are important components to ensure the safe operation of the crane, and their operation must be reliable. For example, the limit switch should be able to cut off the power supply in time when the crane reaches the limit position to prevent the crane from collision and damage.
6) Packaging and transportation
Packaging: Cranes that have passed the commissioning inspection are packaged. Generally, moisture-proof and shock-proof packaging materials such as plastic film and foam pads are used to package the crane. For some large cranes, wooden box packaging can also be used to increase the strength and stability of the packaging.
Transportation: Choose the appropriate transportation method based on factors such as the size, weight and transportation distance of the crane. Common transportation methods include road transportation and rail transportation. During transportation, fixation and protection measures should be taken to prevent the crane from collision and damage.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.