Rail mounted gantry crane (RMG crane) is a heavy-duty container handling equipment widely used in railway freight terminals, container transfer stations, ports, logistics centers, and large container storage yards. It is mainly designed for container loading, unloading, stacking, and horizontal transportation, helping improve cargo handling efficiency and optimize yard management operations.
The crane is mainly composed of the main girder, rigid and flexible gantry legs, hoisting mechanism, trolley traveling mechanism, crane traveling mechanism, electrical control system, and operator cabin. With stable traveling performance and precise positioning capability, the rail mounted gantry crane can efficiently handle continuous high-frequency container operations in large-scale logistics environments.
According to different yard layouts and operational requirements, rail mounted gantry cranes can be designed in several structural types, including single cantilever, double cantilever, and non-cantilever configurations. Different designs provide flexible solutions for various container storage methods, truck transportation systems, and railway handling operations.
Main Structure of Rail Mounted Gantry Crane
Steel Structure Gantry Frame
The rail mounted gantry crane adopts a robust steel structure gantry frame, which forms the main supporting system of the whole machine. It is composed of main girders, rigid and flexible support legs, connecting frames, connecting beams, trolley running rails, walkways, railings, ladders, and other auxiliary metal structures. The combination of rigid and flexible legs helps improve stress balance and structural stability during heavy-duty operation, ensuring safe performance under large loads and long-span working conditions.
Lifting Trolley System
The lifting trolley is a key working unit of the crane, consisting of a trolley frame, hoisting mechanism, and trolley traveling mechanism. The main frame adopts a high-strength box-type welded structure to ensure durability and rigidity. It is also equipped with an integrated rain shed for outdoor operation. For safety and reliability, the trolley includes buffers, rail cleaners, stoppers, and travel limit devices to prevent mechanical impact and ensure smooth operation.
Trolley Traveling Mechanism
The trolley traveling system includes a driving device, walking support structure, and safety components. Its design ensures that wheel pressure is evenly distributed across the same support legs, improving stability during movement. The articulated balanced beam structure allows uniform force distribution on all wheels, reducing wear and extending service life while maintaining smooth and precise traveling performance.
Operator Cabin
The mobile operator cabin is directly connected to the trolley through a rigid support structure, allowing it to move synchronously with the rail mounted gantry crane. This design improves operator visibility and safety while effectively avoiding collisions with containers, stacks, and spreaders during operation.
Power Supply System
The gantry crane on rails adopts a high-voltage cable reel system for main power supply, ensuring stable energy transmission during long-distance traveling. For the trolley, a towline conductive system is used, providing flexible and reliable power delivery while maintaining continuous operation efficiency.
Safety Protection System
A comprehensive safety protection system is integrated into the gantry crane on rails, including short-circuit protection, over-current protection, voltage loss protection, zero protection, lifting limit protection, travel limit protection, overload limiter, emergency power-off system, sound and light alarm devices, and electrical interlock protection. These systems work together to ensure safe and stable crane operation under all working conditions.
Spreader System
The spreader is selected according to different container types and is designed for quick replacement to improve operational efficiency. The hydraulic power station is installed on the spreader, ensuring stable and reliable container lifting performance in various handling applications.
Comprehensive After-Sales Service Support
SEVENCRANE is committed to providing complete and reliable after-sales service to ensure that every RMG crane operates safely, efficiently, and with minimal downtime throughout its service life. Our support system covers installation, training, maintenance, spare parts supply, and long-term technical assistance, helping customers achieve worry-free operation.
Professional Installation & Commissioning
We provide professional installation and commissioning services for RMG cranes and other lifting equipment. Our experienced engineers can guide on-site assembly, electrical connection, system debugging, and full operational testing. This ensures that the crane is correctly installed according to technical standards and is ready for safe operation from the very beginning.
Operator Training
To ensure safe and efficient use of the equipment, SEVENCRANE offers on-site operator training services. Our technical team provides detailed guidance on crane operation, safety procedures, daily inspection methods, and basic troubleshooting. Proper training helps operators improve efficiency while reducing the risk of accidents and equipment damage.
Maintenance & Inspection Service
Regular maintenance is essential for extending RMG Crane life and ensuring stable performance. We provide scheduled inspection and maintenance services, including structural checks, electrical system inspection, lubrication, and safety device verification. Preventive maintenance helps identify potential issues early and reduces unexpected downtime.
Fast Spare Parts Supply
SEVENCRANE maintains a reliable supply chain for critical spare parts to ensure quick replacement when needed. We provide original components that match the crane system perfectly, helping customers minimize production interruptions and maintain continuous operation. Fast delivery of spare parts significantly improves overall equipment availability.
24-Hour Technical Support
Our technical support team is available 24 hours a day to assist customers with any operational or technical issues. Whether it is remote troubleshooting, system guidance, or emergency assistance, we provide timely and professional support to ensure safe and smooth RMG crane operation at all times.
Manufactured with high-strength steel structures and advanced control technology, the rail mounted gantry crane offers excellent stability, durability, and safety performance. SEVENCRANE can also customize lifting capacity, span, lifting height, operating speed, and intelligent control systems according to customer requirements, ensuring reliable and efficient solutions for different material handling applications.
