Port bulk cargo compartment door closing assembly
By designing an adjustable-length port bulk cargo box door closing component, the problem of non-adjustable component length in existing technologies has been solved, improving operational efficiency and safety, and adapting to the usage needs of different scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RI ZHAO GANG JI ZHUANG XIANG FA ZHAN YOU XIAN GONG SI DI YI GANG WU FEN GONG SI
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-28
AI Technical Summary
The existing port bulk cargo box door closing components do not have an adjustable length function during use, resulting in low operational efficiency and affecting the overall operation rhythm and safety.
An assembly structure including a long rod, an extension rod, a threaded groove, an anti-slip plate, and a T-shaped pivot is designed. The assembly length can be flexibly adjusted through threaded connection and sliding adjustment, and a locking mechanism ensures stability.
It enables the length of the closing component to be adjusted according to needs, adapting to the usage requirements of different scenarios, improving operational efficiency and safety, and reducing labor intensity and potential safety risks.
Smart Images

Figure CN224173882U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of freight car door technology, and in particular to a port bulk freight car door closing component. Background Technology
[0002] With large bulk carriers frequently docking, a large amount of bulk cargo needs to be quickly transferred inland. To improve transfer efficiency, ports have placed higher demands on the closing components of bulk cargo wagon doors, hoping to achieve rapid and automatic closing, reduce vehicle waiting time, and improve the overall logistics turnover speed. Some busy coastal ports have exceeded 100 million tons of cargo throughput annually, with hundreds of bulk cargo wagons entering and leaving every day. Only efficient wagon door closing components can meet such a huge transportation demand. The automation level of port bulk cargo train wagon door closing processes is not high, and the operation is highly dependent on manpower. Specialized tools for locking bulk cargo train wagons are indispensable tools for loading and unloading workers. The rationality of tools directly affects operational efficiency, safety, and economic benefits. Taking Rizhao Port No. 1 Company as an example, in the traditional process of locking bulk cargo train doors, loading and unloading workers need to manually hammer or use mechanical assistance to close them, resulting in low operational efficiency, easy hammering and mechanical injuries, and safety hazards.
[0003] Closing cargo compartment doors in ports largely relies on manual operation. Workers must climb to the top of the compartment, manually push the heavy doors, and then align and lock them. This process is extremely labor-intensive, with workers spending long hours at height and facing the risk of falls due to spilled cargo or loss of balance. Furthermore, manual operation is slow, with each door taking a significant amount of time to close. This is especially problematic in large ports with massive daily cargo throughput and numerous cargo compartments queuing for loading and unloading; the inefficiency of manual door closing severely hinders the overall operational pace. Currently available cargo compartment door closing components lack adjustable length, limiting their usability and reducing efficiency. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a port bulk cargo box door closing component, which aims to improve the problem that the existing bulk cargo box door closing components do not have the function of adjusting the length during use, resulting in certain limitations and reduced efficiency in daily use.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a port bulk cargo box door closing assembly, comprising a long rod one, a circular hole being formed in the middle of the left side of the long rod one, a circular column being fixedly connected to the inner side of the circular hole, an extension rod being fixedly connected to the middle of the right side of the circular column, a threaded column being fixedly connected to the other end of the extension rod, a second long rod being provided on the left side of the first long rod, a threaded groove being formed in the inner side of the second long rod, and circular grooves being formed between adjacent sections of the first and second long rods. A second anti-slip plate is slidably connected to the inner side of the circular groove. An arc-shaped groove is provided on the other side of the second anti-slip plate. A first anti-slip plate is slidably connected to the inner side of the arc-shaped groove. Circular limiting posts are provided on the outer walls of both the first and second long rods. A T-shaped rotating shaft is provided on the front inner side of the circular limiting post. A pressing plate is rotatably connected to the top of the outer wall of the T-shaped rotating shaft. A fixing plate is fixedly connected to the rear outer wall of the first long rod. A rotating shaft is rotatably connected to the rear inner side of the fixing plate. A C-shaped elbow is rotatably connected to the outer wall of the rotating shaft.
[0006] As a further description of the above technical solution:
[0007] A circular block is fixedly connected to the left end of the elongated rod 2. A T-shaped head 1 is fixedly connected to the left side of the circular block. Circular strips 1 are fixedly connected to the upper and lower sides of the outer wall of the T-shaped head 1. A T-shaped head 2 is fixedly connected to the right side of the bottom end of the outer wall of the T-shaped head 1.
[0008] As a further description of the above technical solution:
[0009] Protective sleeves are fixedly connected to the outer walls of the first and second long rods on opposite sides, and anti-slip grooves are provided on the outer walls of the protective sleeves.
[0010] As a further description of the above technical solution:
[0011] The C-shaped elbow has anti-slip strips fixedly connected to both the front and rear sides of its outer wall.
[0012] As a further description of the above technical solution:
[0013] Each C-shaped elbow is fixedly connected to a second anti-slip strip.
[0014] As a further description of the above technical solution:
[0015] The inner side of the threaded groove is threadedly connected to the outer wall of the threaded column.
[0016] As a further description of the above technical solution:
[0017] The outer wall of the T-shaped head is fixedly connected to the front and rear sides with circular strips.
[0018] As a further description of the above technical solution:
[0019] Both the front and rear ends of the T-shaped head are fixedly connected with retaining rings.
[0020] This utility model has the following beneficial effects:
[0021] 1. In this utility model, when it is necessary to close the cargo box door of a port bulk cargo truck, the pressing plate is first swung upward, causing the anti-slip plate one and anti-slip plate two to slide synchronously along the inner side of the circular groove. By moving the extension rod outward, the length between the elongated rod one and the elongated rod two can be adjusted. Finally, the pressing plate is pressed downward, thereby locking the circular limit post in conjunction with the T-shaped rotating shaft. Therefore, the length of the cargo box door closing tool can be adjusted according to the needs, thereby meeting the usage conditions of different scenarios and providing the best performance of the closing component tool. Attached Figure Description
[0022] Figure 1 This is a front perspective view of a port bulk cargo car door closing assembly proposed in this utility model;
[0023] Figure 2 This is a rear view of a port bulk cargo car door closing assembly proposed in this utility model;
[0024] Figure 3 This is a partial structural diagram of a port bulk cargo car door closing assembly proposed in this utility model;
[0025] Figure 4 This is a partial structural exploded view of a port bulk cargo car door closing assembly proposed in this utility model;
[0026] Figure 5 This is a partial structural schematic diagram of a port bulk cargo car door closing assembly proposed in this utility model;
[0027] Figure 6 This is a structural exploded view of a port bulk cargo car door closing assembly proposed in this utility model;
[0028] Figure 7 This is a partial structural exploded view of a port bulk cargo car door closing assembly proposed in this utility model.
[0029] Legend:
[0030] 1. Long rod one; 2. Long rod two; 3. Protective sleeve; 4. Circular block; 5. T-head one; 6. Circular strip one; 7. Circular hole; 8. Retaining ring; 9. Circular strip two; 10. T-head two; 11. Anti-slip groove; 12. Fixing plate; 13. Anti-slip strip one; 14. C-shaped elbow; 15. Rotating shaft; 16. Anti-slip strip two; 17. Circular limit post; 18. Extension rod; 19. Threaded post; 20. Anti-slip plate one; 21. Anti-slip plate two; 22. Circular post; 23. Arc groove; 24. T-shaped rotating shaft; 25. Pressing plate; 26. Threaded groove; 27. Circular groove. Detailed Implementation
[0031] 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.
[0032] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a port bulk cargo box door closing assembly, comprising an elongated rod 1, a circular hole 7 in the middle of the left side of the elongated rod 1, a circular column 22 fixedly connected to the inner side of the circular hole 7, an extension rod 18 fixedly connected to the middle of the right side of the circular column 22, a threaded column 19 fixedly connected to the other end of the extension rod 18, an elongated rod 2 on the left side of the elongated rod 1, a threaded groove 26 in the inner side of the elongated rod 2, circular grooves 27 between adjacent elongated rods 1 and 2, and an anti-slip plate 2 slidably connected to the inner side of the right circular groove 27. 1. An arc-shaped groove 23 is provided on the other side of the anti-slip plate 21. The anti-slip plate 20 is slidably connected to the inner side of the arc-shaped groove 23. The outer walls of the long rod 1 and the long rod 2 are provided with circular limiting posts 17. The inner front side of the circular limiting post 17 is provided with a T-shaped rotating shaft 24. The top of the outer wall of the T-shaped rotating shaft 24 is rotatably connected with a pressing plate 25. The outer rear side of the outer wall of the long rod 1 is fixedly connected with a fixing plate 12. The inner rear side of the fixing plate 12 is rotatably connected with a rotating shaft 15. The outer wall of the rotating shaft 15 is rotatably connected with a C-shaped elbow 14. The inner side of the threaded groove 26 is threadedly connected to the outer wall of the threaded post 19.
[0033] Specifically, the long rod 1 and the long rod 2 are connected by a threaded groove 26 on the inner surface of the long rod 2. This threaded groove 26 matches the corresponding structure on the long rod 1, and the two are adjustable. Circular grooves 27 are provided on the adjacent end faces of the long rod 1 and the long rod 2. These circular grooves 27 provide installation space and enhance the stability of the structure. T-shaped rotating shafts 24 are provided on the front side inside these circular limiting posts 17. The upper end of the T-shaped rotating shafts 24 is connected to the pressing plate 25 through a bearing, so that the pressing plate 25 can rotate flexibly as needed to perform specific operations or provide auxiliary support. Circular limiting posts 17 are mounted on the outer surfaces of the long rod 1 and the long rod 2. T-shaped rotating shafts 24 are provided on the front side inside these circular limiting posts 17.
[0034] Please see the appendix Figure 4 - Appendix Figure 7 A circular block 4 is fixedly connected to the left end of the long rod 2. A T-head 5 is fixedly connected to the left side of the circular block 4. Circular strips 6 are fixedly connected to the upper and lower sides of the outer wall of the T-head 5. A T-head 10 is fixedly connected to the right side of the bottom end of the outer wall of the T-head 5. A retaining ring 8 is fixedly connected to the front and rear ends of the T-head 10. Anti-slip strips 13 are fixedly connected to the front and rear sides of the outer wall of the C-shaped elbow 14.
[0035] Specifically, this circular block 4 not only serves as a connector but also plays an important role in transmitting force and stabilizing the structure. Its left edge extends into a T-shaped head 5, which enhances the stability of the connection. These circular strips 6 not only increase the contact area of the T-shaped head 5 and improve the stability of the connection, but the addition of the T-shaped head 10 also enriches the entire connection function. All of them are fixedly installed with retaining rings 8.
[0036] Please see the appendix Figure 5 - Appendix Figure 7 The rear side of the C-shaped elbow 14 is fixedly connected with anti-slip strip 2 16. The outer walls of the long rod 1 and the long rod 2 are fixedly connected with protective sleeve 3 on the side away from each other. The outer wall of the protective sleeve 3 is provided with anti-slip groove 11. The front and rear sides of the outer wall of the T-shaped head 2 10 are fixedly connected with circular strip 2 9.
[0037] Specifically, these protective sleeves 3 not only match the overall appearance of the device, but more importantly, they are made of soft and durable materials, which can effectively buffer external impacts, reduce damage caused by collisions and friction, and extend the service life of the device. At the same time, the outer wall of the protective sleeve 3 is also provided with anti-slip grooves 11, which improves the stability and reliability of the T-head 10 when connected to other components. The presence of the circular strip 9 may also provide auxiliary guidance for specific operations, making the use of the device more convenient and efficient.
[0038] Working principle: When it is necessary to close the cargo box door of a bulk cargo truck at the port, first swing the pressing plate 25 upward to release the restriction on the circular limiting post 17. Then, fix the extension rod 18 to the circular post 22. Next, fix the circular post 22 to the circular hole 7 on the elongated rod 1. Then, rotate the elongated rod 1 and move the threaded post 19 connected to the extension rod 18 outward along the inner side of the threaded groove 26. At the same time, drive the anti-slip plate 1 20 and anti-slip plate 21 to slide synchronously along the inner side of the circular groove 27. By moving the extension rod 18 outward, the length between the elongated rod 1 and the elongated rod 2 can be adjusted. Finally, press the pressing plate 25 downward to lock the circular limiting post 17 with the T-shaped rotating shaft 24. Finally, use the adjusted tool to close the cargo box door. Therefore, the length of the tool for closing the cargo box door can be adjusted according to the needs, so as to meet the usage of different scenarios and provide the best performance of the closing tool.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.
Claims
1. A port bulk cargo car door closing assembly, comprising an elongated rod (1), characterized in that: A circular hole (7) is provided in the middle of the left side of the first elongated rod (1). A circular column (22) is fixedly connected to the inner side of the circular hole (7). An extension rod (18) is fixedly connected to the middle of the right side of the circular column (22). A threaded column (19) is fixedly connected to the other end of the extension rod (18). A second elongated rod (2) is provided on the left side of the first elongated rod (1). A threaded groove (26) is provided on the inner side of the second elongated rod (2). A circular groove (27) is provided between adjacent sections of the first elongated rod (1) and the second elongated rod (2). An anti-slip plate (21) is slidably connected to the inner side of the circular groove (27) on the right side. (21) has an arc groove (23) on the other side. The inner side of the arc groove (23) is slidably connected to the anti-slip plate (20). The outer walls of the long rod (1) and the long rod (2) are provided with circular limiting posts (17). The inner front side of the circular limiting post (17) is provided with a T-shaped rotating shaft (24). The top of the outer wall of the T-shaped rotating shaft (24) is rotatably connected to a pressing plate (25). The outer rear side of the long rod (1) is fixedly connected to a fixing plate (12). The inner rear side of the fixing plate (12) is rotatably connected to a rotating shaft (15). The outer wall of the rotating shaft (15) is rotatably connected to a C-shaped elbow (14).
2. The port bulk cargo car door closing assembly according to claim 1, characterized in that: A circular block (4) is fixedly connected to the left end of the long rod (2), a T-shaped head (5) is fixedly connected to the left side of the circular block (4), a circular strip (6) is fixedly connected to the upper and lower sides of the outer wall of the T-shaped head (5), and a T-shaped head (10) is fixedly connected to the right side of the bottom end of the outer wall of the T-shaped head (5).
3. A port bulk cargo car door closing assembly according to claim 1, characterized in that: The outer walls of the first long rod (1) and the second long rod (2) are fixedly connected to protective sleeves (3) on the side away from each other, and the outer walls of the protective sleeves (3) are provided with anti-slip grooves (11).
4. A port bulk cargo car door closing assembly according to claim 1, characterized in that: The C-shaped elbow (14) has anti-slip strips (13) fixedly connected to the front and rear sides of its outer wall.
5. A port bulk cargo car door closing assembly according to claim 1, characterized in that: Anti-slip strips (16) are fixedly connected to the rear side of each C-shaped elbow (14).
6. A port bulk cargo car door closing assembly according to claim 1, characterized in that: The inner side of the threaded groove (26) is threadedly connected to the outer wall of the threaded column (19).
7. A port bulk cargo car door closing assembly according to claim 2, characterized in that: The outer wall of the T-shaped head 2 (10) is fixedly connected with circular strips 2 (9) on both the front and rear sides.
8. A port bulk cargo car door closing assembly according to claim 2, characterized in that: Both the front and rear ends of the T-head 2 (10) are fixedly connected with retaining rings (8).