A crane anti-derailment device

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By introducing anti-derailment limiting rollers and side rollers into the anti-derailment device of the overhead crane, combined with collision buffers, the problem of derailment caused by inertia or uneven track is solved, achieving higher operational safety and structural stability.

CN224513049UActive Publication Date: 2026-07-17WUHAN HENGJI AUTOMATION CONTROL CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: WUHAN HENGJI AUTOMATION CONTROL CO LTD
Filing Date: 2025-07-23
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

Existing anti-derailment devices for overhead cranes rely solely on simple contact guidance between the guide rail and the rollers. During high-speed operation, sudden stops, or track deformation, lateral deviations can easily occur due to inertia or uneven guide rails, leading to derailment accidents.

Method used

The crane adopts anti-derailment components, including anti-derailment limiting roller structure, side anti-derailment roller structure, collision buffer, etc., which replace sliding friction with rolling friction to achieve multi-directional limiting, reduce running resistance, and enhance structural stability and safety.

Benefits of technology

It effectively prevents lateral deviation of the overhead crane, reduces wear, extends component life, adapts to high-speed and heavy-load conditions, and improves operational safety and structural stability.

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Abstract

This utility model discloses a crane anti-derailment device, relating to the field of crane anti-derailment technology. It addresses the problem that existing crane anti-derailment devices rely solely on simple contact guidance between the guide rail and rollers, lacking dedicated anti-derailment components. This leads to lateral deviation due to inertia or uneven guide rails during high-speed operation, sudden stops, or track deformation, easily resulting in derailment accidents. The crane anti-derailment component includes a crane running guide rail and a mounting frame. A mounting crossbeam is bolted to the mounting frame, and a crane support connector is welded to the mounting crossbeam. A first anti-derailment component is connected through the mounting frame, and a second anti-derailment component is fixedly connected to the lower end of the mounting crossbeam. Limiting ball bearings are embedded in the mounting frame. A first limiting guide groove and a second limiting guide groove are milled at the upper end and middle position of the crane running guide rail, respectively. A third limiting guide groove is milled on the mounting frame.

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Description

Technical Field

[0001] This utility model relates to the field of crane derailment prevention technology, specifically to a crane derailment prevention device. Background Technology

[0002] Overhead cranes, also known as gantry cranes, are lifting equipment that spans across workshops, warehouses, and material yards for material handling. Because their ends rest on tall concrete pillars or metal supports, they resemble bridges. The bridge frame of an overhead crane runs longitudinally along rails laid on elevated supports on both sides, making full use of the space beneath the bridge frame for material handling without obstruction from ground equipment. It is the most widely used and numerous type of lifting machinery. Traditional devices achieve guidance only through simple contact between the guide rails and the crane rollers, without dedicated anti-derailment components. During high-speed operation, sudden stops, or track deformation, the crane is prone to lateral shift due to inertia or uneven guide rails, leading to derailment accidents.

[0003] However, existing anti-derailment devices for overhead cranes rely solely on simple contact guidance between the guide rail and the rollers, without dedicated anti-derailment components. During high-speed operation, sudden stops, or track deformation, lateral deviation can easily occur due to inertia or unevenness of the guide rail, leading to derailment accidents. Therefore, they do not meet current requirements. To address this, we propose an anti-derailment device for overhead cranes. Utility Model Content

[0004] The purpose of this utility model is to provide a crane anti-derailment device to solve the problem mentioned in the background art that the existing crane anti-derailment devices rely only on the simple contact guidance between the guide rail and the roller and do not have a dedicated anti-derailment component. When running at high speed, stopping suddenly or when the track is deformed, the lateral deviation caused by inertia or unevenness of the guide rail can easily lead to derailment accidents.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crane anti-derailment device, comprising a crane anti-derailment component assembly, which includes a crane running guide rail, a mounting frame, and further comprising: a mounting crossbeam bolted to the mounting frame, a crane support connector welded to the mounting crossbeam, a collision buffer embedded and fixedly connected to the crane support connector, a first anti-derailment component penetrating the mounting frame, a second anti-derailment component fixedly connected to the lower end of the mounting crossbeam, a limiting ball bearing embedded and connected to the mounting frame, a first limiting guide groove and a second limiting guide groove milled at the upper end and middle position of the crane running guide rail respectively, and a third limiting guide groove milled on the mounting frame.

[0006] Preferably, the first anti-derailment component includes an anti-derailment limiting roller structure and a roller connecting shaft. The first anti-derailment component is provided with the anti-derailment limiting roller structure, and the anti-derailment limiting roller structure is tactilely connected to the second limiting guide groove. The anti-derailment limiting roller structure is provided with a roller connecting shaft, and the roller connecting shaft is through-connected to the anti-derailment limiting roller structure.

[0007] Preferably, the second anti-derailment component includes a side anti-derailment roller structure and a roller connecting shaft. The side anti-derailment roller structure is provided on the second anti-derailment component, and the side anti-derailment roller structure is embedded and connected to the first limiting guide groove and the third limiting guide groove. The side anti-derailment roller structure is provided with a roller connecting shaft, and the roller connecting shaft is connected through the roller connecting shaft.

[0008] Preferably, one end of the roller connecting shaft is provided with a side anti-derailment roller auxiliary component, and the side anti-derailment roller auxiliary component is fixedly connected to one end of the roller connecting shaft.

[0009] Preferably, the collision buffer includes a collision rubber pad, a spring suppressor, and a spring structure. The collision buffer is provided with a collision rubber pad, which is embedded and connected to the collision buffer. The collision buffer is provided with a spring suppressor inside, which is fixedly connected to the inner bottom wall of the collision buffer. The other end of the spring suppressor is connected to the collision rubber pad. The spring suppressor is provided with a spring structure, which is ring-connected to the spring suppressor.

[0010] Preferably, the overhead crane support connector is provided with mounting bolt holes and slots, which are formed by punching and milling with the overhead crane support connector. The front end face of the overhead crane support connector is provided with a collision buffer mounting groove, which is formed by flushing with the front end face of the overhead crane support connector.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, through the arrangement of a first anti-derailment component, an anti-derailment limiting roller structure, a roller connecting shaft, a second anti-derailment component, a side anti-derailment roller structure, a roller connecting shaft, a side anti-derailment roller auxiliary component, and limiting ball components, achieves lateral limiting of the overhead crane during operation by means of a first anti-derailment component, which is connected to the second limiting guide groove through a rolling connection of the anti-derailment limiting roller structure, thus preventing derailment. The roller connecting shaft penetrates the roller structure, providing rigid support and transmitting rotational power to ensure stable rotation of the roller. Rolling friction replaces sliding friction, reducing running resistance and wear on the guide groove and roller, and extending the component's lifespan. Through the geometric fit between the guide groove and the roller, lateral deviation of the overhead crane is avoided, improving operational safety. The second anti-derailment component, through the side anti-derailment roller structure, is simultaneously embedded in both the first and third limiting guide grooves, achieving dual longitudinal and lateral limiting. The roller connecting shaft penetrates the roller structure, providing stable support and transmitting motion loads. The dual guide grooves enhance limiting strength, adapting to complex working conditions such as high speed and heavy load. The embedded connection method reduces the risk of bolt loosening and improves structural stability. The roller structure evenly distributes local loads to the guide grooves, reducing the risk of structural deformation. Side anti-derailment roller auxiliary components are fixed to the end of the roller connecting shaft, using geometric constraints to assist the roller structure in precise alignment with the guide groove. Limiting ball bearings are embedded in the contact surface between the mounting frame and the guide rail, dispersing local stress through ball rolling. This load dispersion prevents localized wear between the guide rail and the mounting frame, extending the overall structural lifespan. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the overhead crane anti-derailment component device of this utility model;

[0014] Figure 2 This is a partial structural diagram of the crane anti-derailment component device of this utility model;

[0015] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0016] Figure 4 This is a schematic diagram of the collision buffer structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the overhead crane support connector structure of this utility model.

[0018] In the diagram: 1. Overhead crane anti-derailment component; 2. Overhead crane running guide rail; 21. No. 1 limit guide groove; 22. No. 2 limit guide groove; 3. Mounting longitudinal frame; 31. No. 3 limit guide groove; 4. Mounting cross frame; 5. Overhead crane support connector; 51. Mounting fixing bolt hole groove; 52. Collision buffer mounting groove; 6. Collision buffer component; 61. Collision rubber pad; 62. Spring suppressor; 63. Spring structure; 7. First anti-derailment component; 71. Anti-derailment limit roller structure; 72. Roller connecting shaft; 8. Second anti-derailment component; 81. Side anti-derailment roller structure; 82. Roller connecting shaft; 821. Side anti-derailment roller auxiliary component; 9. Limiting ball component. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figure 1-5 This utility model provides an embodiment of a crane anti-derailment device, comprising a crane anti-derailment component device 1, which includes a crane running guide rail 2 and a mounting frame 3. It also includes: a mounting crossbeam 4 bolted to the mounting frame 3; a crane support connector 5 welded to the mounting crossbeam 4; a collision buffer 6 embedded and fixedly connected to the crane support connector 5; a first anti-derailment component 7 penetratingly connected to the mounting frame 3; a second anti-derailment component 8 fixedly connected to the lower end of the mounting crossbeam 4; a limiting ball joint 9 embedded and connected to the mounting frame 3; a first limiting guide groove 21 and a second limiting guide groove 22 milled at the upper end and middle position of the crane running guide rail 2, respectively; and a third limiting guide groove 31 milled on the mounting frame 3.

[0021] Please see Figure 2 The first anti-derailment component 7 includes an anti-derailment limiting roller structure 71 and a roller connecting shaft 72. The anti-derailment limiting roller structure 71 is provided on the first anti-derailment component 7, and the anti-derailment limiting roller structure 71 is rolledly connected to the second limiting guide groove 22. The roller connecting shaft 72 is provided on the anti-derailment limiting roller structure 71, and the roller connecting shaft 72 is connected to the anti-derailment limiting roller structure 71 through the roller. Through the rolling connection between the anti-derailment limiting roller structure 71 and the second limiting guide groove 22, the lateral limiting of the crane during operation is realized to prevent derailment. The roller connecting shaft 72 serves as a support and transmission component to ensure stable rotation of the roller structure. Rolling friction replaces sliding friction, reducing running resistance and wear, and extending the life of the guide groove and roller. The precise limiting design prevents the crane from deviating from the track, improving operational safety. The structure is compact and the maintenance cost is low.

[0022] Please see Figure 2The second anti-derailment component 8 includes a side anti-derailment roller structure 81 and a roller connecting shaft 82. The side anti-derailment roller structure 81 is embedded in and connected to the first limiting guide groove 21 and the third limiting guide groove 31. The side anti-derailment roller structure 81 has a roller connecting shaft 82 that is continuously connected to each other. Through the embedded connection with the first limiting guide groove 21 and the third limiting guide groove 31, the side anti-derailment roller structure 81 achieves multi-directional limiting, preventing the overhead crane from derailing under complex working conditions. The roller connecting shaft 82 provides rigid support. The multiple guide grooves enhance the reliability of the limiting mechanism, adapting to complex scenarios such as high speed and heavy load; the embedded connection reduces the risk of vibration and loosening, resulting in higher stability; the roller structure disperses local stress, reducing the risk of structural deformation.

[0023] Please see Figure 3 One end of the roller connecting shaft 82 is provided with a side anti-derailment roller auxiliary component 821, and the side anti-derailment roller auxiliary component 821 is fixedly connected to one end of the roller connecting shaft 82. The side anti-derailment roller auxiliary component 821 is fixed to the end of the roller connecting shaft 82, which assists the side anti-derailment roller structure 81 to achieve precise guidance. The auxiliary guidance function improves the limit accuracy and reduces the sway of the overhead crane.

[0024] Please see Figure 4 The collision buffer 6 includes a collision rubber pad 61, a spring suppressor 62, and a spring structure 63. The collision rubber pad 61 is embedded in and connected to the collision buffer 6. The spring suppressor 62 is located inside the collision buffer 6 and is fixedly connected to the inner bottom wall of the collision buffer 6. The other end of the spring suppressor 62 is connected to the collision rubber pad 61. The spring structure 63 is provided on the spring suppressor 62 and is looped around it. The collision rubber pad 61 directly absorbs the collision energy, the spring structure 63 further buffers the impact force through compression, and the spring suppressor 62 prevents excessive deformation or uncontrolled rebound of the spring. This multi-stage buffer design of rubber and springs significantly reduces the damage to the crane and track caused by collision impacts; the spring suppressor 62 prevents buffer failure and extends its service life.

[0025] Please see Figure 5The overhead crane support connector 5 is provided with mounting bolt holes and slots 51, which are formed by punching and milling. A collision buffer mounting groove 52 is provided on the front end face of the overhead crane support connector 5, which is formed by flushing. The mounting bolt holes and slots 51 are used to rigidly connect the overhead crane body to the support structure. The collision buffer mounting groove 52 provides a dedicated mounting position for the collision buffer 6, ensuring its proper function. The punched and milled holes and slots have high precision, ensuring connection strength and sealing. The modular design simplifies the installation process and improves assembly efficiency. The dedicated buffer mounting position avoids interference from external forces on the buffer, ensuring its buffering effectiveness.

[0026] Working Principle: During use, the overhead crane anti-derailment device is initially positioned by the mounting frame 3 and the overhead crane running guide rail 2. The mounting frame 3 is vertically fixed to the side of the guide rail, and its milled No. 3 limiting guide groove 31 forms an interlocking fit with the side anti-derailment roller structure 81 of the second anti-derailment component 8. The mounting crossbeam 4 is horizontally connected to the mounting frame 3 and bolted to the overhead crane body through the overhead crane support connector 5. Simultaneously, its front end face has a collision buffer mounting groove 52 providing a dedicated mounting position for the collision buffer component 6, ensuring stable operation of the buffer function. When the overhead crane moves along the guide rail, the first anti-derailment component 7 and the second anti-derailment component 8 work together to achieve multi-directional limiting. The anti-derailment limiting roller structure 71 on the first anti-derailment component 7 is supported by the roller connecting shaft 72 and forms a rolling connection with the No. 2 limiting guide groove 22 of the overhead crane running guide rail 2. Rolling friction replaces sliding friction, reducing running resistance. Simultaneously, the lateral limiting of the roller and guide groove prevents the overhead crane from deviating left or right. The side anti-derailment roller structure 81 on the second anti-derailment component 8 is fixed to the lower end of the mounting crossbeam 4 via roller connecting shaft 82. Its roller portion is simultaneously embedded in the first limiting guide groove 21 on the overhead crane running guide rail 2 and the third limiting guide groove 31 on the mounting longitudinal frame 3, forming a double-guide-groove limiting system. This embedded connection method reduces the risk of vibration and loosening, ensuring the overhead crane maintains longitudinal and lateral stability under high-speed, heavy-load, or complex working conditions. The limiting ball bearings 9 embedded on the mounting longitudinal frame 3 further disperse local stress, helping to reduce swaying during overhead crane operation. If the overhead crane collides due to sudden stop, external interference, or failure of the track end limit, the collision buffer 6 activates a multi-stage buffering mechanism. The collision rubber pad 61 directly contacts the colliding object, absorbing most of the impact energy through material deformation, reducing the damage to the overhead crane body and track caused by the instantaneous impact force. The spring structure 63 is triggered after the rubber pad is compressed, further dispersing the remaining energy through elastic deformation, extending the buffer time, and reducing peak stress. The spring suppressor 62 is connected to the spring structure 63 in a ring. One end is fixed to the bottom wall inside the buffer and the other end is connected to the collision rubber pad 61 to prevent the spring from being over-compressed or rebounding out of control, and to ensure that the buffering process is stable and controllable.

[0027] After the crane stops, all components return to their initial state. The anti-derailment limiting roller structure 71 and the side anti-derailment roller structure 81 maintain light contact with the guide groove to avoid secondary shaking due to excessive gap.

[0028] The spring structure 63 of the collision buffer 6 slowly resets under the action of the spring suppressor 62, and the collision rubber pad 61 returns to its original state, preparing for the next buffering.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] All standard parts used in this article can be purchased from the market. The specific connection methods of each part are all conventional methods such as bolts, rivets, and welding that are mature in the existing technology. They all use conventional models and connection methods in the existing technology, and will not be described in detail here.

Claims

1. A crown block anti-derailing device, comprising a crown block anti-derailing assembly device (1), the crown block anti-derailing assembly device (1) comprising a crown block running rail (2) and a mounting longitudinal frame (3), characterized in that: It also includes: a mounting crossbeam (4) bolted to the mounting longitudinal frame (3), a crane support connector (5) welded to the mounting crossbeam (4), a collision buffer (6) inlaid and fixedly connected to the crane support connector (5), a first anti-derailment component (7) penetratingly connected to the mounting longitudinal frame (3), a second anti-derailment component (8) fixedly connected to the lower end of the mounting crossbeam (4), a limit ball component (9) inlaid and connected to the mounting longitudinal frame (3), a first limit guide groove (21) and a second limit guide groove (22) punched and milled on the upper end and middle position of the crane running guide rail (2), and a third limit guide groove (31) punched and milled on the mounting longitudinal frame (3).

2. The overhead traveling crane anti-derailing device according to claim 1, characterized in that: The first anti-derailment component (7) includes an anti-derailment limiting roller structure (71) and a roller connecting shaft (72). The first anti-derailment component (7) is provided with an anti-derailment limiting roller structure (71), and the anti-derailment limiting roller structure (71) is tactilely connected to the second limiting guide groove (22). The anti-derailment limiting roller structure (71) is provided with a roller connecting shaft (72), and the roller connecting shaft (72) is through-connected to the anti-derailment limiting roller structure (71).

3. The anti-derailment device for overhead cranes according to claim 1, characterized in that: The second anti-derailment assembly (8) includes a side anti-derailment roller structure (81) and a roller connecting shaft (82). The side anti-derailment roller structure (81) is provided on the second anti-derailment assembly (8), and the side anti-derailment roller structure (81) is embedded and connected with the first limiting guide groove (21) and the third limiting guide groove (31). The side anti-derailment roller structure (81) is provided with a roller connecting shaft (82), and the roller connecting shaft (82) is connected to the roller connecting shaft (82) through.

4. The overhead traveling crane anti-derailing device according to claim 3, characterized in that: One end of the roller connecting shaft (82) is provided with a side anti-derailment roller auxiliary component (821), and the side anti-derailment roller auxiliary component (821) is fixedly connected to one end of the roller connecting shaft (82).

5. The overhead hoist de-rail prevention device of claim 1, wherein: The collision buffer (6) includes a collision rubber pad (61), a spring suppressor (62), and a spring structure (63). The collision buffer (6) is provided with a collision rubber pad (61), and the collision rubber pad (61) is embedded and connected to the collision buffer (6). The collision buffer (6) is provided with a spring suppressor (62) inside, and the spring suppressor (62) is fixedly connected to the inner bottom wall of the collision buffer (6). The other end of the spring suppressor (62) is connected to the collision rubber pad (61). The spring suppressor (62) is provided with a spring structure (63), and the spring structure (63) is ring-connected to the spring suppressor (62).

6. The overhead hoist de-rail prevention device of claim 1, wherein: The overhead crane support connector (5) is provided with mounting bolt hole groove (51), and the mounting bolt hole groove (51) is formed by punching and milling with the overhead crane support connector (5). The front end face of the overhead crane support connector (5) is provided with collision buffer mounting groove (52), and the collision buffer mounting groove (52) is formed by flushing with the front end face of the overhead crane support connector (5).