A derailment prevention wheel structure for rail-mounted cranes

Abstract

This utility model discloses an anti-derailment wheel structure for rail-mounted gantry cranes, belonging to the field of lifting and transport machinery technology. The structure includes a U-shaped plate, with left and right extended side plates fixedly connected to its left and right sides respectively. An upper horizontal plate is connected to the top of the two extended side plates, and upper rotating shafts and upper rollers are arranged on both sides of the upper horizontal plate. A connector is provided on the front of the U-shaped plate, and the top of the connector is connected to a lower horizontal plate via a rotating wheel connecting block. Lower rotating shafts and lower rollers are arranged on both sides of the lower horizontal plate. The upper and lower rollers respectively clamp the upper and lower sides of the rail, forming a bidirectional clamping and limiting structure, effectively preventing the rail-mounted gantry crane from derailing during operation. The rollers use a rotary connection, converting sliding friction into rolling friction, reducing running resistance, and improving running stability and safety. The structure is simple and reliable, easy to install and adjust, and suitable for various types of rail-mounted lifting equipment.

Description

Technical Field

[0001] This utility model relates to the field of lifting and transport machinery technology, specifically to an anti-derailment wheel structure for rail-mounted cranes. Background Technology

[0002] Anti-derailment wheel structures for rail-mounted cranes are safety protection devices installed on the traveling mechanism of rail-mounted cranes. They are primarily used to prevent lateral deviation of the crane during operation due to uneven tracks, skewed loads, external impacts, or wear and tear on the mechanism, which could cause the wheels to derail and lead to serious safety accidents such as equipment overturning or cargo falling. This structure typically uses lateral rollers or guide devices to laterally limit the crane's traveling wheels, ensuring they always run smoothly along the centerline of the track.

[0003] Currently, common anti-derailment structures mostly employ fixed lateral guide rails or single-sided roller limiting methods. For example, some equipment welds fixed baffles to the sides of the traveling wheels, achieving limiting through contact between the baffles and the side of the rail. Although this method is simple in structure, it has obvious drawbacks: First, the friction between the baffle and the rail is sliding friction, resulting in high running resistance, noise, and wear. After long-term use, the gap increases, and the limiting effect decreases. Second, single-sided limiting is prone to failure due to uneven force when the crane is running in reverse or subjected to large lateral forces, still posing a risk of derailment.

[0004] Furthermore, some existing technologies employ structures with movable rollers, but these often only have a single layer of rollers, failing to achieve full enclosure and constraint of the track. When the crane experiences vertical displacement due to load swing or localized track deformation, a single layer of rollers cannot effectively limit the vertical movement of the crane body, potentially leading to wheel derailment or jamming. Simultaneously, the existing devices have limited height and width adjustment ranges, making it difficult to adapt to the fine-tuning needs of different track types or installation locations, resulting in inconvenient installation and maintenance, and poor versatility. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-derailment wheel structure for rail cranes to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a derailment prevention wheel structure for a rail-mounted crane, including a U-shaped plate, a left extension side plate fixedly connected to the left side of the U-shaped plate, a right extension side plate fixedly connected to the right side of the U-shaped plate, and upper horizontal plates fixedly connected to the top of the left and right extension side plates. There are two upper horizontal plates, and an upper rotating shaft is provided in the center of each of the two upper horizontal plates. An upper roller is rotatably connected to the upper rotating shaft. A connector is provided on the front of the U-shaped plate, and a rotating wheel connecting block is provided on the top of the connector. A lower horizontal plate is provided on the rotating wheel connecting block, and a lower rotating shaft is provided on each side of the lower horizontal plate. A lower roller is rotatably connected to the lower rotating shaft.

[0007] According to the above technical solution, the U-shaped plate has multiple parallel threaded holes on both its left and right sides.

[0008] According to the above technical solution, the middle part of the connector is coaxially provided with a threaded through hole with the middle part of the U-shaped plate.

[0009] According to the above technical solution, the connector is provided with a limiting member, which is threadedly connected to the connector and the U-shaped plate.

[0010] According to the above technical solution, the left extension side plate and the right extension side plate are coaxially aligned.

[0011] According to the above technical solution, the lower roller is parallel and aligned with the upper roller.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are: The upper rollers on both sides of the upper horizontal plate engage with the upper end of the track, and the lower rollers on both sides of the lower horizontal plate engage with the lower end of the track, forming a two-way wrap-around limiting structure. Whether the crane experiences lateral deviation or vertical movement during operation, immediate restraint is achieved through the contact between the rollers and the sides of the track, effectively preventing the wheels from derailing and significantly improving operational safety. Both the upper and lower rollers are rotatably connected via a rotating shaft, transforming the sliding friction between the traditional baffle and the track into rolling friction. As the crane moves, the rollers rotate accordingly, significantly reducing running resistance and wear, decreasing noise and energy consumption, while ensuring the long lifespan and reliability of the limit mechanism. The U-shaped plate has multiple parallel mounting threaded holes on both sides. The left and right extended side plates can be fixed by selecting mounting holes of different heights, realizing the height adjustment of the upper roller assembly to adapt to different rail sizes or installation space requirements. The connector is further fixed to the U-shaped plate by a limiting component. The limiting depth can be adjusted according to the crane tail structure to improve connection stability and installation flexibility, making it suitable for various models of rail cranes. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the present invention; Figure 3 This is an installation diagram of this utility model; In the diagram: 1. U-shaped plate; 111. Mounting threaded hole; 2. Left extension side plate; 3. Right extension side plate; 4. Connector; 5. Limiting component; 6. Rotary wheel connecting block; 7. Lower horizontal plate; 8. Lower rotating shaft; 9. Lower roller; 10. Upper horizontal plate; 11. Upper rotating shaft; 12. Upper roller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] See Figure 1 This utility model provides a technical solution: a derailment prevention wheel structure for a rail-mounted crane, comprising a U-shaped plate 1. The left and right sides of the U-shaped plate 1 are provided with multiple parallel mounting threaded holes 111. A left extension side plate 2 is fixedly connected to the left side of the U-shaped plate 1 through the mounting threaded holes 111, and a right extension side plate 3 is fixedly connected to the right side of the U-shaped plate 1 through the mounting threaded holes 111. The left and right extension side plates 3 have the same side plate threaded holes, which are aligned with the mounting threaded holes 111 on the U-shaped plate 1. The height of the left and right extension side plates 2 and 3 can be adjusted by mounting them on different mounting threaded holes 111. The left and right extension side plates 2 and 3 are coaxially aligned. A connector 4 is provided on the front of the U-shaped plate 1 for connecting... A threaded through hole is coaxially opened in the middle of the component 4 and the middle of the U-shaped plate 1. A limiting component 5 is provided on the connecting component 4. The limiting component 5 is threadedly connected to the connecting component 4 and the U-shaped plate 1. The limiting component 5 contacts the tail of the crane by the depth of its rotation, thereby forming a limit. A rotating wheel connecting block 6 is provided on the top of the connecting component 4. A lower horizontal plate 7 is provided on the rotating wheel connecting block 6. A lower rotating shaft 8 is provided on each side of the lower horizontal plate 7. A lower roller 9 is rotatably connected to the lower rotating shaft 8. An upper horizontal plate 10 is fixedly connected to the top of the left extension side plate 2 and the right extension side plate 3. There are two upper horizontal plates 10. An upper rotating shaft 11 is provided in the middle of each of the two upper horizontal plates 10. An upper roller 12 is rotatably connected to the upper rotating shaft 11. The lower roller 9 is parallel and aligned with the upper roller 12. The two lower rollers 9 on the lower horizontal plate 7 are engaged with the lower end, and the two upper rollers 12 on the upper horizontal plate 10 are engaged with the upper end of the track. This prevents the crane from derailing during operation. At the same time, since rollers are used, they do not hinder the operation and movement. On the contrary, they help the crane.

[0016] Working principle: The device and the crane are connected via connector 4 and U-shaped plate 1. Connector 4 and U-shaped plate 1 have coaxial threaded through holes in their middle sections. During installation, the pre-installed mounting holes of the corresponding connection parts of the crane are aligned with these threaded through holes. High-strength bolts are then passed through the threaded through holes and tightened, rigidly fixing connector 4 to the crane body. This, in turn, ensures a stable connection between the entire wheel structure and the crane, guaranteeing that the connection can withstand the loads and vibrations during the operation of the rail-mounted crane. To prevent relative displacement at the connection points, the limiting piece 5 on connector 4 is threaded to both connector 4 and U-shaped plate 1. After the main connection is completed, the limiting piece 5 is rotated to adjust its insertion depth, ensuring its end fits tightly against the corresponding limiting surface at the tail of the crane, forming a lateral limiting support. This further restricts horizontal displacement between the device and the crane, preventing bolts from loosening due to long-term vibration and improving the stability and reliability of the connection. After connection and fixation, the lower rollers 9 on both sides of the lower horizontal plate 7 are engaged with the lower ends of the track, and the upper rollers 12 on the upper horizontal plate 10 are engaged with the upper ends of the track. Through the bidirectional clamping structure of the upper and lower rollers, the track is fully enclosed and limited. When the rail crane experiences lateral deviation, tilting, or other derailment-prone situations, the two sides of the track contact the corresponding upper roller 12 or lower roller 9. The rollers dissipate the lateral force through rotation, and at the same time, the contact limit prevents the crane from continuing to deviate, thus avoiding a derailment accident. The upper roller 12 has a shaft hole in its center that matches the outer diameter of the upper rotating shaft 11, and the lower roller 9 has a shaft hole that matches the lower rotating shaft 8. During assembly, the upper rotating shaft 11 is passed through the shaft hole of the upper roller 12, and the lower rotating shaft 8 is passed through the shaft hole of the lower roller 9. The lower roller 9 is parallel and aligned with the upper roller 12, and the left extension side plate 2 is coaxial and aligned with the right extension side plate 3. When the rail-mounted crane moves along the track, the upper and lower rollers roll synchronously, converting sliding friction into rolling friction and reducing running resistance. At the same time, the rollers roll in accordance with the direction of track extension, ensuring that the crane can still move smoothly under the limit state without affecting normal operation.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A derailment prevention wheel structure for a rail-mounted crane, characterized in that, The device includes a U-shaped plate (1), a left extension side plate (2) fixedly connected to the left side of the U-shaped plate (1), a right extension side plate (3) fixedly connected to the right side of the U-shaped plate (1), and an upper horizontal plate (10) fixedly connected to the top of the left extension side plate (2) and the right extension side plate (3). There are two upper horizontal plates (10), and an upper rotating shaft (11) is provided in the center of each of the two upper horizontal plates (10). An upper roller (12) is rotatably connected to the upper rotating shaft (11). A connector (4) is provided on the front of the U-shaped plate (1), and a rotating wheel connecting block (6) is provided on the top of the connector (4). A lower horizontal plate (7) is provided on the rotating wheel connecting block (6), and a lower rotating shaft (8) is provided on each side of the lower horizontal plate (7). A lower roller (9) is rotatably connected to the lower rotating shaft (8).

2. The anti-derailment wheel structure for a rail-mounted crane according to claim 1, characterized in that, The U-shaped plate (1) has multiple parallel mounting threaded holes (111) on both the left and right sides.

3. The anti-derailment wheel structure for a rail crane according to claim 2, characterized in that, The connector (4) has a threaded through hole coaxially with the middle part of the U-shaped plate (1).

4. The anti-derailment wheel structure for a rail crane according to claim 3, characterized in that, The connector (4) is provided with a limiting member (5), and the limiting member (5) is threadedly connected to the connector (4) and the U-shaped plate (1).

5. The anti-derailment wheel structure for a rail crane according to claim 4, characterized in that, The left extended side plate (2) and the right extended side plate (3) are coaxially aligned.

6. The anti-derailment wheel structure for a rail-mounted crane according to claim 5, characterized in that, The lower roller (9) is aligned parallel to the upper roller (12).

Images