Vienos sijos viršutinis kranas

A single girder overhead crane is a type of bridge crane commonly used in industrial settings for material handling. It consists of a single horizontal beam (the girder) supported at both ends by end trucks, with a hoist and trolley system running along the underside of the girder.

Typical Applications

✔ Manufacturing Workshops: Automotive component assembly lines, material handling for mechanical processing

✔ Logistics and Warehousing: Pallet lifting in automated storage systems, bulk cargo transportation across storage zones

✔ Energy Sector: Power plant equipment maintenance, wind turbine blade assembly stations

As a leading supplier of bridge cranes, SEVENCRANE leverages its own modern manufacturing base to provide high-performance, cost-effective machines for customers worldwide. With over 20 years of industry experience and a manufacturing system certified by ISO, CE, and EAC, we ensure that every piece of equipment meets stringent industrial standards. Welcome to download the product manual or make an appointment with the factory for on-site machine inspection, and let our engineers customize the best material handling plan for you.

Lengvas ir efektyvus dizainas

The crane adopts an optimized box-type main girder structure, reducing its own weight by 15%-20%. This ensures exceptional stability within a load range of 1 to 20 tons, effectively reducing the load-bearing pressure on factory buildings.

Modular Intelligent Control

Equipped with a standard variable frequency drive system and anti-sway technology, the crane offers positioning accuracy of ±5mm. It supports three operational modes: remote control, pendant control, and cabin control, making it ideal for precision assembly scenarios. This flexibility ensures smooth handling in diverse environments.

Full Lifecycle Service

From load analysis and non-standard customization to installation, commissioning, and maintenance training, the crane provides a comprehensive, one-stop service. Key components come with a 2-year warranty, and lifetime technical support is offered to ensure optimal performance and longevity.

Factory Direct Supply Price Advantage

With in-house production of the main girder, end trucks, and electrical control systems, the crane is available at a cost that is 10%-15% lower than comparable models from competitors. This direct supply model allows for better pricing without compromising quality.

Fast Delivery Capability

Standard models are delivered within just 15 days from the factory, ensuring minimal downtime and quick deployment for your operations.

800+ Non-Standard Customization Cases

With experience in over 800 customized projects, the crane can be tailored to meet specific requirements such as explosion-proof models, low headroom versions, and dual-speed lifting systems, making it adaptable to various special applications.

Main beam

It is the main structural part of a single-beam bridge crane, usually consisting of a steel beam. It spans the working area of ​​the crane, supports other components and ensures stable operation of the crane.

End beam

The end beam is installed at both ends of the bridge, usually including a wheel frame and an electric drive device. They allow the entire crane to move longitudinally on the factory track.

Vežimėlis

The trolley is a device that moves along the bridge, which is equipped with a lifting mechanism. The trolley enables the hook to move laterally within the width of the bridge, thereby achieving precise lifting.

Keltuvas

The lifting mechanism is one of the core components of the crane, responsible for lifting and lowering the cargo. It usually includes components such as an electric motor, a reducer, a wire rope, and a hook. The lifting mechanism can provide different lifting capacities and lifting speeds as needed.

Control system

The control system is a device used to operate the crane. It controls the lifting, movement, running direction and speed of the crane, etc., to ensure efficient and safe operation of the crane.

Motors and drive system

The motor is the key device to drive the various moving parts of the crane (such as end beam drive, hoist trolley movement, etc.). The drive system usually includes motors, reducers and transmission devices to ensure the smooth operation of the crane.

Braking system

The braking system is used to control the crane to stop moving, ensuring that it can stop quickly and safely after the work is completed or in an emergency.

Raw material procurement and pretreatment

First, we start with high-quality steel, mainly including I-beams, steel sections and stainless steel plates. The purchased steel is subjected to chemical composition analysis and mechanical property tests to ensure compliance with industry standards. Subsequently, the steel is cut using CNC blanking equipment and pre-processed into the basic shapes of each component.

Processing and welding

The cut parts will enter the processing stage and will be further processed by lathes, milling machines and other precision machinery to ensure the dimensional accuracy of each component. The main structural parts such as bridges and end beams are usually processed by whole plate processing or multi-plate welding. During the welding process, the welds are processed strictly in accordance with the process requirements to ensure the welding quality and connection strength. At the same time, the welds are non-destructively tested to prevent safety hazards caused by welding defects.

Assembly and commissioning

The processed parts will be pre-assembled in the assembly workshop, mainly including the assembly of the main beam, hoisting mechanism, wheels and drive system. A standardized process is used in the assembly process, and each step must ensure a firm connection and precise fit. After assembly, technicians will debug the overall structure to ensure smooth operation of each motion mechanism and stable transmission system, and calibrate the electronic control system and frequency conversion speed regulation system.

Painting and anti-corrosion treatment

In order to extend the service life of the equipment, all steel structure components will be cleaned and rust-free before or after assembly, and sprayed with anti-rust paint or other environmentally friendly coatings. This step is not only beautiful, but also effectively prevents corrosion and wear.

Quality inspection and factory testing

After the product is assembled, a comprehensive quality inspection will be carried out, including size, load testing, wind resistance and reliability testing of the electronic control system. After all tests are qualified, the equipment enters the factory packaging and transportation preparation stage.

Perkrovos ribotuvas

This system monitors the crane’s load and automatically stops the operation if the load exceeds the safe limit, preventing overloading.

Cross travel limiter

Limit switches control the travel range of the crane to ensure it does not exceed its designated operating area, thereby preventing collisions or damage.

Kėlimo aukščio ribotuvas

The lifting height limiter is designed to prevent the crane’s spreader or hook from exceeding the predetermined highest or lowest position, thereby avoiding possible equipment damage or safety accidents. When the spreader rises or descends to the set limit position, the limiter will automatically cut off the lifting power source to ensure safe operation.

Buferis

The buffer is usually installed at the end of the crane running track. Its main function is to absorb the kinetic energy of the crane or trolley when it runs to the end of the track, slow down the impact and prevent equipment damage.