Travelling Single Girder Overhead 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

🔧 What Is the Main Beam?
It's the horizontal beam that spans the width of the crane's operating area.

In a single girder crane, there's only one main beam, unlike double girder cranes which have two.

🏗️ Main Functions:
Supports the hoist and trolley that moves along the beam.

Transfers the load weight to the end trucks, which then transfer it to the runway beams or supporting structure.

📐 Common Specifications:
Material: Usually made from Q235B / Q345B steel, or sometimes box-type welded structure for strength and lightness.

Cross-Section: Can be I-beam (rolled steel) or box-type (welded steel plates).

Length: Depends on the span requirement (often 5m to 30m or more).

Camber: Designed with a slight arch (camber) to counteract bending under load.

🧰 Integrated Features:
Running rail on the top of the beam for the hoist/trolley.

Electrical cable support (cable festoon system or conductor rail).

 

2.Lifting System

A Travelling Single Girder Overhead Crane Lifting System is a common type of industrial lifting equipment used in factories, warehouses, and workshops. Here's a breakdown of its components and function:

🔧 What It Is:
A Single Girder Overhead Crane consists of a single horizontal beam (girder) that supports a hoist which moves along the girder. The entire girder travels along rails mounted on the building structure, allowing full coverage of the working area.

🧱 Main Components:
Single Girder – One main beam spanning across the workspace.

End Carriages – Located at both ends of the girder; have wheels that move along the runway rails.

Hoist and Trolley – Lifting mechanism that travels along the girder; can be electric or manual.

Runway Beams/Rails – Mounted on the structure or columns for crane movement.

Control System – Either pendant control, wireless remote control, or a cabin.

🔄 Key Movements:
Hoist Movement (Up/Down)

Trolley Travel (Left/Right along the girder)

Crane Travel (Forward/Backward along the runway)

3.End carriage

A Travelling Single Girder Overhead Crane End Carriage is a critical component of a single girder overhead crane system. Here's a breakdown of what it is and what it does:

🔧 What is an End Carriage?
An end carriage is the wheeled structure on either side of the overhead crane that allows the entire crane bridge (the horizontal beam) to move along the runway beams. These run on tracks fixed to the building's structure.

⚙️ Key Features:
Travelling Mechanism: Equipped with motorized wheels or geared motors to move the crane along the length of the building or workshop.

Support for Bridge Beam: Holds the single girder (main beam) and allows it to span across the work area.

Drive Units: Often come with built-in motors and gearboxes for smooth, synchronized motion.

Wheel Type: Can be standard or anti-friction wheels depending on load and rail type.

📏 Typical Specifications:
Load Capacity: Depends on the crane system, but generally supports light to medium loads (up to ~20 tons).

Travel Speed: Variable (e.g., 10–20 m/min) depending on the application and motor system.

Motor Type: Usually three-phase induction motors with brake systems.

Materials: High-strength steel, with precision-machined wheels.

🧰 Optional Features:
Frequency inverters for smooth acceleration/deceleration.

Anti-collision sensors for safety.

Encoder or limit switches for position control.

 

4.Crane travelling mechanism

The travelling mechanism of a Single Girder Overhead Crane is a critical component that enables the crane to move horizontally along the runway rails installed on either side of the crane bay. Here's a breakdown of the main components and how the system works:

🔧 Key Components of the Travelling Mechanism
Crane End Carriages (End Trucks):

Located on either end of the girder.

Each has wheels that run on the runway rails.

Often include motors, gearboxes, and wheel assemblies.

Travel Drive Motors:

Electric motors mounted on the end carriages.

Drive the wheels directly or via gear reducers.

May be single-speed, dual-speed, or variable frequency drives (VFDs) for smoother control.

Wheels:

Typically made of forged steel.

Can be double-flanged or guided by side rollers.

Designed for long life and smooth movement on the rail.

Gearboxes:

Connected between the motors and the wheels.

Provide the necessary torque and speed conversion.

Brakes:

Electromagnetic or hydraulic.

Ensure the crane stops safely and securely when needed.

Couplings:

Link the motors and gearboxes to the wheel shafts.

Absorb shock loads and misalignments.

Control System:

Operator uses a pendant, radio remote control, or cabin controls.

Sends commands to the motor control center to manage movement.

🚀 Working Principle
When an operator activates the crane to move along the runway:

Electrical signals are sent to the travel motors.

Motors drive the gearboxes, which turn the wheels.

The crane travels along the length of the bay in either direction (long travel).

Braking systems slow down and stop the crane smoothly when required.

 

 

5.Trolley travelling mechanism

The travelling mechanism of a Single Girder Overhead Crane Trolley is a key component that allows the trolley (which carries the hoist) to move laterally along the bridge girder. This mechanism is crucial for positioning loads accurately across the working area. Here's a breakdown of its components and operation:

🔧 Components of the Travelling Mechanism
Travel Wheels

Attached to the trolley frame.

Run along the top or bottom flange of the single girder (depending on design).

Usually made of forged steel.

Drive Motor

Powers the movement of the trolley.

Usually an electric motor, sometimes integrated with a gearbox (geared motor).

Gearbox / Transmission System

Reduces motor speed and increases torque.

Transfers torque from the motor to the drive wheels.

Couplings

Connect motor/gearbox to drive wheels.

Allow for slight misalignment and torque transmission.

Brakes

Often electromagnetic.

Automatically apply when power is off, ensuring safe stopping.

Control System

Controls the start, stop, direction, and speed.

Operated via pendant control, radio remote, or cabin.

⚙️ How It Works
When the operator activates the travel function, the motor turns the drive wheels.

These wheels move the trolley (and hoist) along the length of the single girder.

The movement allows the load to be positioned left or right (along the X-axis of crane operation).

7.Crane Hook

The hook is a lifting component attached to the hoist (which is mounted on the girder). It:

Engages the load via slings, chains, or lifting devices.

Is typically forged from high-strength steel.

May come in different designs: single hook, double hook, C-type hook, etc.

✅ Key Features of a Crane Hook on a Single Girder Crane:

Feature Description
Load Capacity Varies (typically 1–20 tons for single girder cranes)
Swiveling Some hooks rotate 360° to align with the load
Latch Safety latch prevents the load from slipping off
Mounting Attached to a wire rope hoist or chain hoist
Standard Often meets ISO, DIN, or FEM standards

8.Motor

⚙️ Motor Types Used
Squirrel Cage Induction Motors (Most common)

Durable and simple

Low maintenance

Slip Ring Motors

Used for heavy-duty applications requiring high starting torque

Brake Motors

Integrated braking system to hold position when not powered

🔌 Key Motor Specifications
When choosing or replacing a motor for a single girder crane, these parameters matter:

Spec Description
Power (kW/HP) Depends on crane capacity and speed (typically 0.75–15 kW)
Voltage Common: 380V / 415V / 440V AC, 3-phase
Speed (RPM) Usually low-speed motors (around 900–1500 RPM)
Duty Class S3 to S4 (intermittent or short-time duty)
Brake Type Electromagnetic disc or shoe brakes
Enclosure Type TEFC (Totally Enclosed Fan Cooled) for dusty environments

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9.Sound and light alarm system & limit switch

A Travelling Single Girder Overhead Crane typically incorporates sound and light alarm systems and limit switches to enhance operational safety and control. Here's a quick breakdown of both systems:

🔊 Sound and Light Alarm System
Purpose: To warn personnel of crane movement or potential hazards.

Features:

Audible alarms (buzzers or sirens): Alert workers when the crane is operating or moving.

Visual alarms (flashing lights): Often mounted on the crane to signal movement or emergency states.

Automatic activation: Typically linked to crane movement (e.g. when hoisting, traversing, or traveling).

Manual override (optional): For emergency warnings.

Benefits:

Improves workplace safety.

Reduces risk of accidents by increasing awareness.

🛑 Limit Switches
Purpose: To prevent the crane or hoist from moving beyond safe operational limits.

Types:

Travel Limit Switches: Prevent the crane from traveling beyond the end of the runway.

Hoist Limit Switches: Stop the hook from over-hoisting (going too high) or over-lowering (going too low).

Slewing/Trolley Limit Switches (if applicable): Limit the side movement of trolley or rotation of the crane.

Working:

When the mechanism reaches a predefined point, the switch is triggered.

It cuts power to the relevant motor, stopping motion instantly.

Benefits:

Prevents mechanical damage.

Avoids potential collisions or load drops.

10.Safety Devices

A travelling single girder overhead crane must be equipped with various safety devices to ensure safe operation and prevent accidents. Here's a list of essential safety features typically used:

🔧 Mechanical Safety Devices
Limit Switches

Hoisting limit switch: Prevents over-lifting and over-lowering of the hook.

Travel limit switches: Prevent the crane or trolley from colliding with end stops.

End Stops & Buffers

Mounted at the end of crane runways to absorb impact and prevent derailment.

Overload Limiter (Load Limiter)

Prevents the crane from lifting loads above its rated capacity.

Anti-Derailment Devices

Keeps the crane securely on its rails during movement.

Brake System

Automatic brakes engage when the power is off or when the operator stops the crane.

⚡ Electrical Safety Devices
Emergency Stop Button

Instantly cuts off power and stops all crane operations.

Phase Failure Protection

Prevents crane operation when a phase of electrical power is lost or reversed.

Overcurrent and Overvoltage Protection

Protects motors and electrical components from damage.

Earth Fault Protection / Grounding System

Ensures operator safety in case of insulation failure.

👷 Operational and Additional Safety Features
Warning Devices

Audible and visual alarms (horns, flashing lights) when the crane is moving or lifting.

Operator Cab or Pendant Control with Safety Features

Emergency stop, control lock, and proper insulation.

Load Indicator or Display (optional but recommended)

Shows real-time load being lifted.

Anti-collision Devices (for multiple cranes on same runway)

Prevents cranes from colliding with each other.

Wire Rope Safety

Use of quality wire rope and drum with safety groove; regular inspection required.

Maintenance Platforms and Access Ladders (if applicable)

For safe maintenance of crane components.

 

11.Control Mode

The control mode of a travelling single girder overhead crane refers to how the crane's movements-such as hoisting, traversing (trolley travel), and long travel (crane movement along the runway)-are managed by the operator. There are several common control modes, depending on the design and application of the crane. Here are the main types:

🔹 1. Pendant Control (Wired)
Description: A handheld control unit is physically connected to the crane via a cable.

Pros:

Simple and cost-effective.

Direct and reliable control.

Cons:

Limited operator mobility.

Risk of cable wear or entanglement.

🔹 2. Wireless Remote Control
Description: The operator uses a wireless remote to control the crane from a safe distance.

Pros:

Increased safety and mobility.

Operator can stand in the best position for visibility and safety.

Cons:

Requires battery power.

Slightly higher cost.

Potential for signal interference (though modern systems are quite robust).

🔹 3. Cabin Control (Rare for Single Girder)
Description: An operator sits in a cabin mounted on the crane.

Pros:

Suitable for large or heavy-duty cranes with frequent use.

Good visibility over the work area.

Cons:

Uncommon for single girder cranes due to space and cost.

More complex installation and operation.

🔹 4. Automatic/PLC-Controlled Operation
Description: Crane operation is partially or fully automated using programmable logic controllers (PLCs).

Pros:

Precise and repeatable movement.

Can be integrated into automated production lines.

Cons:

High initial cost and complexity.

Requires advanced setup and maintenance.

Sketch

 

Main technical

 

 

A Traveling Single Girder Overhead Crane offers several advantages that make it a popular choice for various industrial and commercial applications. Some of the key benefits include:

Cost-Effective: Single girder cranes are generally more affordable than their double girder counterparts because they require fewer materials and less labor to construct and install.

Space Efficiency: These cranes are ideal for areas with limited overhead space, as they typically have a smaller, more compact design. The reduced height of the girder system allows more clearance below the crane.

Lightweight Design: The single girder design reduces the overall weight of the crane, which can lead to less strain on the building structure and reduced operational wear and tear.

Simple Construction and Maintenance: With fewer components compared to double girder cranes, single girder systems are simpler to maintain, with fewer parts that may need repairs or replacement over time.

Versatility: They are suitable for a wide range of lifting applications, from light to moderate loads, in industries such as warehouses, workshops, and factories.

Improved Visibility: The lower profile of the crane provides better visibility for operators, reducing the risk of accidents and improving overall safety.

Reduced Operational Costs: Due to the lighter weight and more straightforward design, these cranes tend to have lower energy consumption and operational costs compared to more complex systems.

Customizable Options: Traveling single girder cranes can be customized with a variety of features, including different lifting capacities, control systems, and hook configurations, to meet specific needs.

Faster Installation: Since the design is less complex, these cranes are typically quicker to install, which can minimize downtime for businesses during setup.

In general, a traveling single girder overhead crane is ideal for situations where lifting needs are moderate and efficiency, cost, and space constraints are a priority.

 

 

A Travelling Single Girder Overhead Crane is a type of crane that consists of a single horizontal girder (the main support beam) supported by end trucks that allow the crane to move along parallel tracks. These cranes are widely used in various industries and applications due to their efficient use of space and ability to lift heavy loads. Here are some typical applications:

1. Manufacturing and Assembly
Used in factories for lifting and moving heavy components, such as parts in automotive assembly lines, machinery in industrial manufacturing, and components in equipment assembly.

2. Warehouse and Distribution Centers
Helps in moving materials or products along a designated path, loading/unloading goods from containers, or organizing inventory.

3. Construction
Employed in construction sites for lifting building materials, structural steel, or heavy tools and equipment in high-rise construction or large infrastructure projects.

4. Material Handling
Used to transport heavy loads such as steel, pipes, and raw materials in steel mills, factories, or warehouses. These cranes help in stacking and unstacking materials efficiently.

5. Shipyards and Ports
Used for loading and unloading heavy cargo or containers from ships, especially in port terminals or shipbuilding yards.

6. Mining and Heavy Industry
Used in mines or heavy industry plants to lift and move mining equipment, raw materials, or products in areas with limited space.

7. Power Stations
In power plants, they assist in the maintenance or handling of large equipment, like generators or turbines, during installation or repair work.

 

The production procedure for a single girder overhead crane involves several key steps, each of which ensures the final product meets safety, quality, and functional standards. Here's a general outline of the process:

1. Design and Engineering
Customer Requirements: Gather specifications based on the lifting capacity, span, height of lift, and operational conditions.

Design Layout: Create a detailed design, including the crane's structural components (girder, trolley, hoist), and ensure compliance with international safety and performance standards.

Stress and Load Analysis: Engineers perform calculations to determine the loads each component will bear during operation.

Drawings and Approvals: Produce CAD drawings and get customer approval for the final design.

2. Material Selection and Procurement
Material Specification: Based on the design, choose suitable materials (e.g., steel for the girder and structural components, specialized materials for the hoist).

Procurement: Order and acquire materials based on the specifications (e.g., steel plates, beams, motors, electrical components).

3. Fabrication
Cutting and Shaping: Steel plates and beams are cut to the required sizes and shapes for the crane structure (girder, support legs, etc.).

Welding and Assembly: Components are welded together to form the crane's main structure, including the girder and supporting parts.

Machining: Certain parts, such as bearings, wheels, or brackets, may need precise machining to meet tolerances.

4. Hoist and Trolley Manufacturing
Hoist Assembly: The hoist unit, which includes the motor, gearbox, drum, and cable system, is assembled.

Trolley Construction: The trolley, which carries the hoist, is built to fit onto the crane's girder and travel along it smoothly.

Motor and Control Systems: Motors and control panels are installed, ensuring the trolley and hoist can be operated safely and efficiently.

5. Painting and Surface Treatment
Surface Preparation: After fabrication, all steel components are cleaned (e.g., shot blasting or sandblasting) to remove rust, mill scale, and contaminants.

Painting: A protective coating or paint is applied to prevent corrosion and improve the crane's lifespan. The paint can be color-coded for visual identification or to match customer preferences.

Drying: Allow the painted components to cure and dry fully before moving on to the next steps.

6. Assembly and Integration
Main Assembly: The crane's components (girder, trolley, hoist, control systems) are assembled together in the factory. This includes installing the trolley on the girder, aligning the hoist, and connecting electrical components.

Electrical Wiring: Wiring for control systems, safety devices (limit switches, emergency stops), and any automated systems is installed.

Testing: Preliminary functional testing is conducted to ensure all parts operate correctly.

7. Quality Control and Testing
Inspection: Thorough inspection of welds, structural components, and moving parts. Check for proper alignment and finishing.

Load Testing: Perform static and dynamic load tests to ensure the crane can handle its rated capacity. This step simulates actual operational conditions.

Safety Features Check: Ensure that safety systems, such as limit switches, overload protection, emergency stops, and alarms, are functioning.

8. Packaging and Shipping
Final Inspection: Conduct a final round of inspections to verify all systems and components.

Packing: Components are carefully packed for transportation to prevent damage during shipping. Some parts may be disassembled for easier shipping.

Shipping: The crane is shipped to the customer, ensuring compliance with shipping regulations and proper documentation.

9. Installation and Commissioning
Site Preparation: The customer prepares the installation site, ensuring the area is safe and ready for crane installation.

Installation: The crane is installed at the customer's site, including final assembly if necessary.

Commissioning: The crane is tested again on-site to confirm all systems work as expected and that the crane operates safely.

10. Training and Handover
Training: Operators and maintenance personnel are trained on how to use and maintain the crane properly.

Handover: The crane is officially handed over to the customer after final checks and customer satisfaction approval.

By following these steps, the single girder overhead crane is successfully produced and delivered, ensuring it meets the customer's specifications and industry safety standards.

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%.