Workshop Overhead Crane

Core Components: Gearbox, Motor, Gear

Place of Origin: Henan, China

Warranty: 1 Year

Weight (KG): 30000 kg

Video outgoing-inspection: Provided

Machinery Test Report: Provided

Selling Units: Single item

Single package size: 600X300X300 cm

Single gross weight: 200.000 kg

 

 

 

Workshop overhead cranes consist of several critical components that work together to provide safe and efficient material handling. Here's a detailed breakdown:

Main Structural Components

Bridge Girder(s)

Single girder (for lighter loads) or double girder (for heavy-duty applications)

Box-type or I-beam construction

Supports the entire load and moves along the runway

 

End Trucks

Wheeled assemblies at each end of the bridge

Contain drive motors and wheels for longitudinal movement

Equipped with bumpers for collision protection

 

Hoisting Mechanism

Hoist Unit

Electric chain hoist (1-20 tons) or wire rope hoist (5-500+ tons)

Includes motor, gearbox, brake, and load drum

May feature variable frequency drive for smooth operation

 

Trolley

Carries the hoist across the bridge girder(s)

Manual push, hand chain, or motor-driven options

Equipped with limit switches for safe travel

Runway System

Runway Beams

Typically I-beams or box sections

Mounted to building columns or freestanding support structure

Must be properly aligned and leveled

 

Runway Rails

Steel tracks for smooth crane movement

Usually ASME standard crane rails or modified I-beams

Electrical Systems

Power Supply

Festoon system (cable trays with sliding contacts)

Conductor bar system for cleaner power delivery

Emergency stop circuits for safety

 

Control System

Pendant control (most common)

Radio remote control options

Variable speed controls available

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Safety Components

Limit Switches

Upper/lower hoist limits

Bridge and trolley travel limits

Load Monitoring

Load moment indicators

Overload protection devices

Bumpers & Buffers

Rubber or spring shock absorbers

End-of-travel buffers

Optional Features

Lighting Package - Work area illumination

Crane Scale - Integrated weighing system

Anti-Sway System - For precision load positioning

Automation - Programmed movement patterns

Key Considerations for Component Selection

Capacity Requirements - Match components to your maximum load

Duty Cycle - Standard (CMAA Class B) vs. heavy-duty (Class D)

Span Length - Determines girder size and runway requirements

Lifting Height - Affects hoist selection and building clearances

Environmental Factors - Corrosion protection, explosion-proof options

Proper maintenance of these components is essential for safe operation and long service life. Regular inspections should focus on:

Structural integrity of girders and connections

Wear patterns on wheels and rails

Proper functioning of all safety devices

Electrical system condition

Sketch

 

Main technical

 

 

Key Advantages of Workshop Overhead Cranes

Space Optimization

Operates above floor level, freeing up valuable workspace

Eliminates floor obstructions compared to forklifts or mobile cranes

Ideal for facilities with limited floor space

Enhanced Productivity

Faster material handling than manual methods

Enables precise positioning of heavy loads

Reduces worker fatigue and injury risks

Safety Improvements

Removes need for manual lifting of heavy objects

Reduces forklift traffic and associated hazards

Built-in safety features (limit switches, overload protection)

Cost Efficiency

Lower long-term operating costs than forklifts

Minimal maintenance requirements

Long service life (20+ years with proper maintenance)

Versatility

Customizable for specific applications

Adaptable to various load capacities (1-500+ tons)

Can be equipped with special attachments (magnets, grabs, etc.)

Improved Workflow

Enables straight-line material movement

Facilitates assembly line processes

Reduces material handling time

 

 

Specialized Applications

Foundries: Handling molten metal containers

Paper Mills: Moving heavy paper rolls

Shipbuilding: Positioning large ship components

Construction: Pre-cast concrete handling

Common Applications

Manufacturing Facilities

Moving raw materials between workstations

Positioning heavy machinery components

Handling finished products for storage/shipping

Automotive Industry

Engine assembly and installation

Chassis handling and positioning

Stamping press servicing

Metal Fabrication

Moving steel plates and beams

Loading/unloading CNC machines

Handling heavy weldments

Warehousing & Logistics

Loading/unloading trucks

Stacking heavy pallets

Moving large equipment

Maintenance Shops

Equipment repair and servicing

Heavy component replacement

Machine tool installation

Aerospace Industry

Aircraft component handling

Engine maintenance

Large assembly positioning

Energy Sector

Transformer handling

Turbine maintenance

Heavy generator positioning

 

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%.