Among the numerous components of a crane, the end beam may not be the most eye-catching, but it undoubtedly plays a crucial role in connecting the upper and lower parts.Many people who are new to cranes think that end beams only appear on double-girder cranes. In fact, this is a common misunderstanding.Today, let's have a good talk about what end beams are and their functions in different types of cranes.
What is an end beam
The end beams are the crossbeam structures at both ends of the crane bridge frame, just like the "left and right arms" of the bridge frame.It is connected to the main beam (or the main load-bearing part of the bridge frame) on one side, and wheels, buffers, limiters and other components are installed on the other side, enabling the crane to move smoothly on the track.
Structurally speaking, end beams are usually box-shaped structures welded together, and some are steel section composite structures. The main considerations are load-bearing capacity and anti-deformation ability.Its length should be designed based on parameters such as the span and rated lifting capacity of the crane. It is necessary to ensure a stable connection with the main beam while also making the installation position of the wheels comply with the track spacing requirements.
End beams are not only found on double-girder cranes
Many people think that end beams are exclusive to double-girder cranes, but that's not the case.End beams can be seen in various types of cranes such as single-girder cranes and gantry cranes. However, in different models, their forms and functions may vary slightly.
- The end beam of a double beam crane: In a double-girder crane, the end beam is a key component connecting the two main beams, forming a complete "bridge frame" structure.It not only has to bear the weight transmitted by the main beam, but also move the entire bridge frame on the trolley track, so the requirements for strength and rigidity are particularly high.Moreover, on the end beams of a double-girder crane, a large vehicle running mechanism is usually installed, including motors, reducers, wheel sets, etc. These components work together to enable the crane to move laterally.
- The end beams of a single beam crane: Although a single-girder crane has only one main girder, end beams are still needed at both ends for support and connection.The end beams of single-girder cranes are relatively lighter, but their functions are not bad.One end of it is connected to the main beam, and the other end is equipped with wheels, allowing the crane to run on the track.Meanwhile, some limit devices and buffers will also be installed on the end beams to ensure the safety of the crane during operation.
- The end beam of a gantry crane: In the gantry structure of a gantry crane, the end beam is also an important component.It is located on both sides of the gantry, not only supporting the main beam but also bearing the self-weight and lifted load of the entire crane, while moving along the ground track with the gantry.The end beams of gantry cranes often need to be designed in different lengths and structural forms according to the site conditions and operation requirements.
No matter what type of crane it is, the core role of the end beam cannot be separated from these points:
- Connection and load-bearing: It connects the main beam, running mechanism and other components into a whole, evenly transmitting the lifted weight and self-weight to the track, ensuring the overall stability of the crane during operation.
- Achieving mobility: The wheel sets and running mechanisms installed on the end beams are the "power sources" that enable the crane to move along the tracks, allowing the crane to operate flexibly within a certain range.
- Safety Assurance: Safety devices such as buffers and travel limiters are usually installed on the end beams. When the crane runs to both ends of the track, these devices can play a role in buffering and limiting, preventing the crane from derailing or colliding, and ensuring the safety of the operation.
