High Quality Single Girder Bridge Crane

Core Components: Gearbox, Motor, Gear

Place of Origin: Henan, China

Warranty: 1 Year

Weight (KG): 10000 kg

Video outgoing-inspection: Provided

Machinery Test Report: Provided

Selling Units: Single item

Single package size: 600X300X300 cm

Single gross weight: 200.000 kg

 

 

 

1.Main beam

Box-Type Welded Structure:
The main beam adopts a box-type or I-beam welded structure with reinforced ribs. This design provides high torsional rigidity and load-bearing capacity while keeping the overall weight low.

Optimized Profile:
Designed using finite element analysis (FEA) to ensure optimal strength-to-weight ratio, reduce deadweight, and enhance crane performance.

Camber Design:
Built-in camber (arch curve) compensates for deflection under load, ensuring stability and balance during lifting.

 

2.Lifting System

Lifting Hoist
Type: Electric wire rope hoist or electric chain hoist

Configuration: Compact low-headroom or standard headroom, based on application

Lifting Capacity: 1 ton to 20 tons (customizable)

Lifting Height: Standard 6–12 meters; extendable upon request

Lifting Motor
Type: Squirrel cage or pole-changing motor

Insulation Class: F or H

Protection Class: IP54–IP55

Cooling Method: Natural air or fan-cooled

Brands: Siemens, ABM, Nanjing Motor, SEW (optional)

Features:

Thermal protection

Smooth start and stop

Optional variable frequency drive (VFD) for soft operation

Gearbox
Design: Helical or planetary geared transmission

Lubrication: Oil-filled sealed system for low maintenance

Noise Level: Low-noise, vibration-resistant design

Rope Drum & Wire Rope
Drum: Grooved high-strength steel drum for proper rope guidance and extended rope life

Rope: Anti-rotation, galvanized wire rope with safety factor ≥ 5:1

3.End carriage

The end carriage is a critical structural and mechanical component of a single girder bridge crane. It connects to both ends of the main beam and houses the crane traveling mechanism, enabling smooth and accurate movement along the runway rails. Designed with modular structure and high precision, the end carriages ensure reliable performance, ease of assembly, and long-term durability.

 

4.Crane travelling mechanism

The crane traveling mechanism enables the entire crane to move along the longitudinal runway rails, allowing it to reach any position within the workshop or warehouse. Built for precision, durability, and smooth motion, this mechanism is engineered with advanced motor technology and robust gear systems to meet high-quality operational standards.

5.Trolley travelling mechanism

The trolley traveling mechanism allows the hoisting trolley (which carries the hoist and hook) to move horizontally along the bottom flange of the main girder, enabling lateral movement of loads. It is engineered for precision, smooth motion, and high durability to suit continuous industrial operation.

6.Crane wheel

The wheels of a single girder bridge crane are critical components that support and guide the movement of both the crane (end carriages) and the trolley along the runway and main beam. High-quality wheels ensure smooth travel, long service life, and reduced rail wear, especially in demanding industrial environments.

7.Crane Hook

Single Hook:

Most commonly used for single girder cranes due to compact design and simplicity

Suitable for capacities from 1 to 20 tons (customizable)

Swivel Hook (optional):

Allows 360° rotation to prevent rope twisting and improve load positioning

8.Motor

The motor is the heart of the crane's mechanical systems, powering the lifting, trolley, and long-travel movements. In a high-quality single girder bridge crane, motors are engineered for reliability, high efficiency, smooth performance, and long service life under continuous industrial use.

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9.Sound and light alarm system & limit switch

Sound and Light Alarm System
Overview
The sound and light alarm system is a key safety feature of high-quality single girder bridge cranes. It provides audible and visual warnings during crane operation to alert workers of movement, lifting, or abnormal conditions-significantly reducing the risk of accidents in busy industrial environments.

Limit Switches
Overview
Limit switches are critical safety devices used to prevent over-travel or dangerous movements of crane components such as the hoist, trolley, and crane bridge. They automatically cut off power or trigger an alarm when motion exceeds preset safe ranges.

10.Safety Devices

Overload Protection Device
Detects if the crane is lifting beyond its rated capacity

Automatically stops lifting operation to prevent mechanical damage or accidents

Typically uses load cells or strain gauge sensors integrated into the hoist system

Limit Switches
Lifting Limit Switch: Prevents hook over-travel (over-hoisting and over-lowering)

Travel Limit Switch: Stops trolley and crane travel at runway or beam ends to avoid collisions

Adjustable and mechanically robust for long-term reliability

Emergency Stop (E-Stop)
Emergency stop buttons located at the control pendant, cabin, and remote control

Instantly cuts power to all crane motors when pressed

Easily accessible and highly responsive

Anti-Collision System
Sensors (ultrasonic, infrared, or laser) detect proximity of multiple cranes or obstacles

Automatically slows down or stops the crane to avoid collisions

Widely used in workshops with several cranes operating simultaneously

Travel and Hoist Brakes
Electromagnetic or spring-applied disc brakes with automatic engagement in power failure

Provide safe holding of the load and crane position

Hook Safety Latch
Prevents accidental disengagement of the load from the hook

Usually spring-loaded and made of high-strength steel.

11.Control Mode

The control mode defines how the operator interacts with the crane to perform lifting, trolley, and traveling movements. High-quality single girder bridge cranes offer multiple control options to meet diverse operational needs, ensuring safety, precision, and ease of use.

Sketch

 

Main technical

 

 

1. Lightweight and Compact Design
Uses a single girder main beam, reducing overall crane weight.

Smaller headroom requirement, maximizing lifting height and space utilization.

Easier installation and less structural support needed in the building.

2. Cost-Effective
Lower initial investment compared to double girder cranes.

Reduced material and manufacturing costs.

Lower maintenance expenses due to simpler structure and fewer components.

3. High Efficiency and Flexibility
Smooth and precise lifting and traveling operations.

Wide range of lifting capacities (typically from 1 to 20 tons) adaptable to various applications.

Suitable for diverse industries including manufacturing, warehousing, automotive, and light assembly.

4. Easy Operation and Control
Multiple control modes available: pendant, wireless remote, cabin, and automation-ready.

Smooth acceleration and deceleration with optional VFD control reduces load swing and wear.

Intuitive controls improve operator comfort and safety.

5. Safety and Reliability
Equipped with advanced safety devices such as overload protection, limit switches, emergency stop, and anti-collision systems.

Durable, high-quality components ensure long service life and reduced downtime.

Complies with international safety standards (FEM, ISO, CMAA).

6. Maintenance-Friendly
Simplified design allows easy access to mechanical and electrical parts.

Standardized components make replacement and repair convenient.

High-quality motors, brakes, and electrical systems reduce maintenance frequency.

 

1. Manufacturing and Assembly Plants
Ideal for lifting and moving raw materials, parts, and finished products within assembly lines.

Used in automotive, electronics, machinery, and appliance production to enhance workflow efficiency.

2. Warehousing and Storage Facilities
Facilitates loading and unloading of goods.

Efficiently handles pallets, containers, and heavy equipment.

Optimizes space with precise load positioning.

3. Workshops and Maintenance Areas
Assists in lifting heavy machine parts for repair, maintenance, and fabrication.

Provides safe and easy handling of tools and equipment.

4. Light to Medium Duty Material Handling
Suitable for industries requiring moderate lifting capacity (1 to 20 tons).

Common in textile mills, plastics, food processing, and packaging industries.

5. Construction and Fabrication
Supports lifting and positioning of steel structures, frames, and components.

Used in metal fabrication shops and prefabrication plants.

6. Laboratories and Research Facilities
Handles delicate and precise material lifting with smooth control.

Enables safe movement of experimental equipment and apparatus.

7. Hazardous and Special Environments
Explosion-proof single girder cranes available for petrochemical, pharmaceutical, and mining industries.

Customized with corrosion-resistant coatings for chemical plants.

 

1. Design and Engineering
Requirement Analysis: Collect client requirements including load capacity, span, lifting height, control mode, and special features.

Structural Design: Use advanced CAD software (e.g., AutoCAD, SolidWorks) to design the main beam, end carriages, trolley, and hoisting mechanisms ensuring compliance with FEM, ISO, and CMAA standards.

Electrical & Control Design: Develop electrical schematics and control system layouts.

Load Calculation & Simulation: Perform finite element analysis (FEA) and dynamic simulations to verify structural integrity and performance.

2. Material Procurement
Select high-quality steel plates and components per design specifications.

Source motors, gearboxes, electrical parts, and safety devices from certified suppliers.

Inspect all incoming materials for quality and compliance.

3. Fabrication
Cutting & Shaping: Use CNC plasma cutting and laser cutting machines to precisely cut steel plates.

Forming & Bending: Bend steel components to required shapes with press brakes.

Welding: Skilled welders perform welding following strict procedures (MIG/TIG welding, full penetration) to ensure structural strength.

Stress Relieving: Conduct post-welding heat treatment to reduce residual stresses.

4. Machining
Machine critical parts such as wheel sets, shafts, bearing seats, and connection interfaces using CNC machining centers.

Ensure precision tolerances and surface finishes as per design requirements.

5. Assembly
Pre-assemble subcomponents such as end carriages, trolley frames, and hoisting units.

Assemble the main beam, install end carriages, trolley, and hoist.

Install electrical components, wiring, and control panels.

Fit safety devices including limit switches, overload protection, and alarms.

6. Surface Treatment
Conduct sandblasting or shot blasting to clean surfaces.

Apply anti-corrosion primer and high-quality industrial paint coatings.

Optional powder coating or special coatings for harsh environments.

7. Testing & Quality Control
Static Load Testing: Verify lifting capacity using calibrated test weights.

Dynamic Testing: Check operational functions including lifting, trolley, and crane travel.

Safety Devices Test: Validate limit switches, overload protection, alarms, and emergency stop functions.

Electrical Testing: Insulation resistance, continuity, and control system functionality.

Final Inspection: Comprehensive review by quality assurance team before shipment.

8. Packaging and Delivery
Dismantle large components as required for transport.

Use protective packaging to prevent damage during shipping.

Prepare shipping documents and manuals.

Coordinate logistics for on-time delivery.

9. Installation and Commissioning (Optional)
Provide on-site assembly, installation, and alignment services.

Conduct final functional testing and operator training.

Hand over complete documentation including certificates, manuals, and maintenance guides.

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%.