Two-way self-locking safety fastener structure for container door

Abstract

The application discloses a container door bidirectional self-locking type safety fastener structure and relates to the field of container door locks. The container door bidirectional self-locking type safety fastener structure comprises two installation boxes, an installation pipe is rotationally connected in the installation box, a transmission gear is fixedly sleeved on the outer surface of the installation pipe, two outer transmission racks are meshingly connected with the outer surface of the transmission gear, two inner transmission racks meshingly connected with the transmission gear are arranged at the rear of the two outer transmission racks, the container door bidirectional self-locking type safety fastener structure is rotated by rotating the installation pipe to drive the transmission gear to rotate, and then the outer transmission rack and the inner transmission rack are moved to drive the fixed pipe to be inserted into the door frame fixing groove, so that the inner and outer double fixing is realized, the stability after locking is greatly enhanced, the door lock loosening or opening caused by bumping or external force during transportation is effectively prevented, and the safety of goods is ensured. Meanwhile, when the outer transmission rack moves, the self-locking column is automatically inserted into the self-locking hole to complete self-locking under the action of the first spring, so that the operation is convenient and safe.

Description

Technical Field

[0001] This invention relates to container door lock technology, specifically to a two-way self-locking safety fastener structure for container doors. Background Technology

[0002] In the container shipping industry, the security, stability, and ease of use of container door locks are crucial, directly affecting the safety of goods inside the container and the efficiency of loading and unloading. However, existing container door lock technology has many problems and fails to meet the needs of actual transportation and operation.

[0003] Existing container door locks have significant shortcomings in terms of locking stability. During transportation, containers encounter various complex environments and road conditions, inevitably subjected to bumps and external forces. Existing lock structures often fail to provide sufficient stability, easily leading to loosening or even opening, putting the cargo inside at risk of loss or damage, causing substantial economic losses for the shipper. Furthermore, regarding ease of operation, some locks' self-locking mechanisms require additional complex procedures. In emergencies or when operators are inexperienced, errors can easily occur, preventing timely self-locking and compromising security. Moreover, some lock designs are inefficient, resulting in cumbersome opening processes that waste time and manpower, reducing loading and unloading efficiency.

[0004] In summary, existing container door lock technologies have problems in terms of locking stability and ease of operation, which urgently need to be addressed. Therefore, developing a new type of container door lock structure is of great practical significance. Summary of the Invention

[0005] The purpose of this invention is to provide a two-way self-locking safety fastener structure for container doors, so as to solve the problems of locking stability and ease of operation in the existing container door lock technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a two-way self-locking safety fastener structure for a container door, comprising two mounting boxes, an mounting tube rotatably connected inside the mounting box, a transmission gear fixedly sleeved on the outer surface of the mounting tube, two external transmission racks meshing with the outer surface of the transmission gear, two internal transmission racks meshing with the transmission gear behind the two external transmission racks, and a fixing tube fixedly connected to both the external and internal transmission racks via a connecting plate, with a limit block slidably connected to the outer surface of the fixing tube;

[0007] One side of the external drive rack is provided with a self-locking mechanism connected to the mounting box. The self-locking mechanism is used to self-lock the external drive rack and the drive gear.

[0008] Furthermore, the self-locking mechanism includes a self-locking pin slidably connected to an external transmission rack. A first spring, fixedly connected to the external transmission rack, is fitted onto the outer surface of the self-locking pin. A snap-fit ​​box is provided inside the mounting box. A self-locking hole, slidably connected to the self-locking pin, is provided on the snap-fit ​​box. A transmission pin, slidably connected to the mounting box, is slidably connected to the snap-fit ​​box. A first transmission wedge is fixedly connected to the transmission pin. A second transmission wedge is slidably connected to one side of the first transmission wedge. A top pin, slidably connected to the snap-fit ​​box, is fixedly connected to one side of the second transmission wedge. A second spring, fixedly connected to the snap-fit ​​box, is fixedly connected to one side of the second transmission wedge.

[0009] Furthermore, a third spring, which is fixedly connected to the mounting box, is fixedly sleeved on the outer surface of the transmission column, and a ball bearing is rotatably connected to one end of the self-locking column.

[0010] Furthermore, an intermediate transmission rack is meshed with the outer surface of the transmission gear, a transmission plate is fixedly connected to one side of the intermediate transmission rack, a fixed post is fixedly connected to the transmission plate and slidably connected to the mounting box, and a fixing hole is provided on the mounting box for slidably connecting to the fixed post.

[0011] Furthermore, two oil injection pipes are fixedly connected to the mounting pipe, and oil seepage holes are opened on the outer surface of the fixed pipe. An oil supply mechanism is provided on the mounting box, which is used to supply oil to the mounting pipe and the fixed pipe.

[0012] Furthermore, the oil supply mechanism includes an oil supply tank fixedly connected to the mounting box, an extrusion plate slidably connected inside the oil supply tank, an extrusion column slidably connected to the oil supply tank fixedly connected to one side of the extrusion plate, the outer surface of the mounting tube being fixedly connected to the oil supply tank via a hose, and a hose fixedly connected to the oil supply tank being fixedly connected to the outer surface of the mounting tube.

[0013] Furthermore, an oil inlet pipe is fixedly connected to the outer surface of the oil supply tank, and a sealing block is threaded onto the oil inlet pipe.

[0014] Furthermore, a mounting block is fixedly connected to the mounting box, and the mounting block has mounting holes.

[0015] Compared with the prior art, the container door bidirectional self-locking safety fastener structure provided by the present invention has the following beneficial effects:

[0016] The container door's bidirectional self-locking safety fastener structure of this invention possesses unique bidirectional self-locking and convenient opening functions, bringing extremely high safety and convenience to the use of container doors. During the locking process, rotating the mounting tube drives the transmission gear to rotate, which in turn moves the outer and inner transmission racks, causing the fixing tube to insert into the door frame fixing groove, achieving double fixing from both inside and outside. This greatly enhances the stability after locking, effectively preventing the door lock from loosening or opening due to bumps or external forces during transportation, ensuring cargo safety. Simultaneously, when the outer transmission rack moves, the self-locking pin automatically inserts into the self-locking hole under the action of the first spring to complete the self-locking, requiring no additional operation, making it both convenient and safe.

[0017] To open, pull or push the drive column, which, through a series of transmissions, pushes the top column out of the self-locking column, releasing the self-lock. Then, rotating the mounting tube in the opposite direction removes the fixed tube, enabling portable opening. Furthermore, the drive column can move both inside and outside the door, and the mounting tube can also rotate in both directions, allowing the door to open from both sides. This prevents external personnel from accidentally locking loading and unloading workers inside the container during loading, comprehensively improving the door lock's security and practicality, and providing reliable protection for container transportation.

[0018] A complete lubrication system is formed by the oil spray pipe on the mounting pipe and the oil seepage hole on the fixing pipe, in conjunction with the oil supply mechanism. The oil supply mechanism is simple to operate: lubricating oil is injected into the oil supply tank through the oil inlet pipe, and after tightening the sealing block, the extrusion column is pushed. The extrusion plate acts like a precise oil pump, forcing the oil through the hoses into the mounting and fixing pipes. The mounting pipe then sprays lubricating oil evenly onto the surfaces of the internal gears and rack through the oil spray pipe, forming a lubricating protective film that effectively reduces friction and wear, lowers noise, and extends service life. The fixing pipe slowly overflows lubricating oil through the oil seepage hole, fully lubricating the contact surfaces of the limit block and the fixing pipe, ensuring smooth sliding and reducing jamming. This comprehensive lubrication design can withstand humid marine and harsh land transportation environments, preventing the lock body from rusting and maintaining good working condition at all times, ensuring safe transportation of goods. It is also easy to operate, requiring no professional maintenance, reducing operating costs and maintenance difficulty, and has extremely high practical value and promotional significance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a partial first perspective view of the connection state between the bidirectional self-locking safety fastener structure of the present invention and the container door;

[0021] Figure 2This is a partial second perspective view of the connection state between the bidirectional self-locking safety fastener structure of the present invention and the container door;

[0022] Figure 3 This is a partial third perspective view of the connection state between the bidirectional self-locking safety fastener structure of the present invention and the container door;

[0023] Figure 4 This is a partial fourth perspective view of the connection state between the bidirectional self-locking safety fastener structure of the present invention and the container door;

[0024] Figure 5 This is a top view of the internal structure of the snap-fit ​​box of the present invention;

[0025] Figure 6 This is a partial front view of the internal structure of the external transmission rack of the present invention;

[0026] Figure 7 This is a side view of the internal structure of the fuel tank of the present invention;

[0027] Figure 8 For the present invention Figure 3 Enlarged view of A in the middle;

[0028] Figure 9 For the present invention Figure 4 A magnified view of B in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Mounting box; 2. Mounting tube; 3. Transmission gear; 4. External transmission rack; 5. Internal transmission rack; 6. Fixing tube; 7. Limiting block; 11. Self-locking post; 12. First spring; 13. Snap-fit ​​box; 14. Self-locking hole; 15. Transmission post; 16. First transmission wedge; 17. Second transmission wedge; 18. Top post; 19. Second spring; 190. Third spring; 191. Ball bearing; 21. Intermediate transmission rack; 22. Transmission plate; 23. Fixing post; 24. Fixing hole; 31. Oil injection pipe; 32. Oil seepage hole; 41. Oil supply tank; 42. Extrusion plate; 43. Extrusion post; 44. Oil inlet pipe. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Please see Figures 1 to 9As shown, the present invention provides a two-way self-locking safety fastener structure for a container door, including two mounting boxes 1. A mounting tube 2 is rotatably connected inside the mounting box 1. A transmission gear 3 is fixedly sleeved on the outer surface of the mounting tube 2. Two external transmission racks 4 are meshed on the outer surface of the transmission gear 3. Two internal transmission racks 5 are provided behind the two external transmission racks 4 and mesh with the transmission gear 3. A fixing tube 6 is fixedly connected to both the external transmission racks 4 and the internal transmission racks 5 through a connecting plate. A limit block 7 is slidably connected to the outer surface of the fixing tube 6.

[0034] A self-locking mechanism connected to the mounting box 1 is provided on one side of the external transmission rack 4. The self-locking mechanism is used to self-lock the external transmission rack 4 and the transmission gear 3. A mounting block is fixedly connected to the mounting box 1, and a mounting hole is provided on the mounting block.

[0035] The self-locking mechanism includes a self-locking pin 11 slidably connected to the external transmission rack 4. A first spring 12, which is fixedly connected to the external transmission rack 4, is fixedly sleeved on the outer surface of the self-locking pin 11. A snap-fit ​​box 13 is provided inside the mounting box 1. A self-locking hole 14, which is slidably connected to the self-locking pin 11, is provided on the snap-fit ​​box 13. A transmission pin 15, which is slidably connected to the mounting box 1, is provided on the transmission pin 15. A first transmission wedge 16 is fixedly connected to the transmission pin 15. A second transmission wedge 17 is slidably connected to one side of the first transmission wedge 16. A top pin 18, which is slidably connected to the snap-fit ​​box 13, is fixedly connected to one side of the second transmission wedge 17. A second spring 19, which is fixedly connected to the snap-fit ​​box 13, is fixedly connected to one side of the second transmission wedge 17.

[0036] A third spring 190, which is fixedly connected to the mounting box 1, is fixedly sleeved on the outer surface of the transmission column 15, and a ball bearing 191 is rotatably connected to one end of the self-locking column 11.

[0037] The outer surface of the transmission gear 3 is meshed with an intermediate transmission rack 21. A transmission plate 22 is fixedly connected to one side of the intermediate transmission rack 21. A fixing post 23 that is slidably connected to the mounting box 1 is fixedly connected to the transmission plate 22. A fixing hole 24 that is slidably connected to the fixing post 23 is provided on the mounting box 1.

[0038] In practical use, the mounting box 1 is first securely fixed to the container door through the mounting holes on the mounting block. Simultaneously, the limiting block 7 is precisely fixed to the container door panel, and a fixing groove matching the fixing tube 6 is made on the container door frame. When locking the container door, simply rotate the mounting tube 2. The mounting tube 2 drives the transmission gear 3 to rotate, precisely transmitting power to the outer transmission rack 4 and the inner transmission rack 5, causing them to move along a predetermined trajectory. The outer transmission rack 4 and the inner transmission rack 5 drive the fixing tube 6 to move, allowing the fixing tube 6 to accurately insert into the fixing groove on the container door frame, achieving double fixing of the container door from both inside and outside. This design greatly improves the stability of the container door after locking, effectively preventing the lock from loosening or opening due to bumps or external forces during transportation, thus ensuring the safety of the goods inside the container.

[0039] While the external drive rack 4 is moving, the self-locking pin 11 on the external drive rack 4, under the action of the first spring 12, quickly and accurately inserts into the self-locking hole 14 on the snap-fit ​​box 13, firmly fixing the self-locking pin 11 and the external drive rack 4, thereby achieving self-locking of the fixing tube 6. This self-locking mechanism requires no additional operation steps and is completed automatically during the door locking process, greatly improving the convenience and safety of use.

[0040] When the container door needs to be opened after the self-locking is complete, simply pull or push the transmission column 15. This compresses the third spring 190, and simultaneously, the transmission column 15 moves the first transmission ramp 16. The first transmission ramp 16, through its inclined surface, moves the second transmission ramp 17. The second transmission ramp 17 then moves the top column 18, which pushes the self-locking column 11 out of the self-locking hole 14, releasing the self-locking state. At this point, rotating the mounting tube 2 in the reverse direction allows the fixing tube 6 to be easily removed from the fixing groove, enabling portable opening of the self-locked fixing tube 6.

[0041] Furthermore, this structure features a unique and user-friendly design. The drive column 15 can move both inside and outside the container door, while the mounting tube 2 can also rotate both inside and outside the container door, allowing the container door to be opened from both directions. This design plays a crucial role in preventing the loading of larger containers, avoiding situations where external personnel might accidentally trap loading and unloading workers inside the container due to negligence, further enhancing the security and practicality of the door lock.

[0042] Example 2

[0043] Based on Example 1, please refer to Figures 4 to 8As shown, two oil injection pipes 31 are fixedly connected to the mounting pipe 2, and an oil seepage hole 32 is opened on the outer surface of the fixed pipe 6. An oil supply mechanism is provided on the mounting box 1, which is used to supply oil to the mounting pipe 2 and the fixed pipe 6.

[0044] The oil supply mechanism includes an oil supply tank 41 fixedly connected to the mounting box 1, an extrusion plate 42 slidably connected inside the oil supply tank 41, an extrusion column 43 slidably connected to the oil supply tank 41 fixedly connected to one side of the extrusion plate 42, the outer surface of the mounting pipe 2 is fixedly connected to the oil supply tank 41 through a hose, and the outer surface of the fixed pipe 6 is fixedly connected to a hose fixedly connected to the oil supply tank 41.

[0045] An oil inlet pipe 44 is fixedly connected to the outer surface of the oil supply tank 41, and a sealing block is threaded onto the oil inlet pipe 44.

[0046] In practical use, when lubrication maintenance of the door lock is required, simply inject lubricating oil into the oil supply tank 41 through the oil inlet pipe 44, and then tighten the sealing block. When lubrication is needed, push the extrusion column 43, which in turn moves the extrusion plate 42. The extrusion plate 42 acts like a precise oil pump, squeezing the oil in the oil supply tank 41, allowing the lubricating oil to smoothly enter the mounting pipe 2 and the fixing pipe 6 through the hose. The mounting pipe 2 sprays lubricating oil evenly onto the internal gear and rack surfaces through the oil spray pipe 31, forming a protective lubricating film that effectively reduces friction and wear between the gears and rack, lowers noise, and extends service life. Simultaneously, the fixing pipe 6 slowly overflows lubricating oil through the oil seepage hole 32, allowing the lubricating oil to seep between the limit block 7 and the fixing pipe 6, fully lubricating their contact surfaces and ensuring smoother sliding of the fixing pipe 6, reducing the occurrence of jamming.

[0047] This comprehensive lubrication design provides all-around maintenance for the lock body, effectively preventing corrosion from prolonged use and significantly improving its stability and reliability. Whether in humid marine environments or harsh land transport conditions, it ensures the lock remains in optimal working condition, providing strong protection for the safe transport of containerized goods. Furthermore, the lubrication mechanism is simple and convenient to operate, requiring no professional personnel for lubrication and maintenance, reducing operating costs and maintenance difficulty, and possessing high practical value and significant potential for widespread adoption.

[0048] Working Principle: The mounting box 1 is fixedly installed on the container door, and the limiting block 7 is fixedly installed on the container door panel. A fixing groove is made on the container door frame. When locking the container door, rotating the mounting tube 2 drives the transmission gear 3, which in turn moves the outer transmission rack 4 and the inner transmission rack 5. The outer and inner transmission racks 4 and 5 then move the fixing tube 6, inserting it into the fixing groove on the container door frame. This achieves internal and external fixation of the container door, greatly improving the stability of the locked door. When the outer transmission rack 4 moves, the self-locking pin 11 on the outer transmission rack 4, under the force of the first spring 12, is driven to insert into the self-locking hole 14 on the snap-fit ​​box 13, fixing the self-locking pin 11 and the outer transmission rack 4, thereby securing the fixing tube 6. The self-locking mechanism, once completed, allows the container door to be opened by pulling or pushing the transmission column 15. This compresses the third spring 190, and the transmission column 15 moves the first transmission ramp 16, which in turn moves the second transmission ramp 17. The second transmission ramp 17 then moves the top column 18, which pushes the self-locking column 11 out of the self-locking hole 14. The mounting tube 2 is then rotated to remove the fixing tube 6 from its groove, allowing for easy opening of the self-locked fixing tube 6. The transmission column 15 can move both inside and outside the container door, and the mounting tube 2 can also rotate within the door, enabling the door to be opened from both sides. This prevents external personnel from accidentally trapping loading and unloading workers inside the container during loading of larger containers, further enhancing the door's security.

[0049] Lubricating oil is injected into the oil supply tank 41 through the oil inlet pipe 44, and then the oil inlet pipe 44 is sealed by the sealing block. When the door lock is lubricated, the squeezing column 43 is pushed, which drives the squeezing plate 42 to move. The squeezing plate 42 squeezes the oil in the oil supply tank 41, so that the lubricating oil enters the installation pipe 2 and the fixing pipe 6 through the hose. The installation pipe 2 sprays oil to lubricate the surface of the gears and rack inside through the oil spray pipe 31. At the same time, the fixing pipe 6 overflows the lubricating oil through the oil seepage hole 32. At this time, the lubricating oil lubricates the space between the limit block 7 and the fixing pipe 6, thereby achieving comprehensive lubrication of the lock body, effectively preventing the lock body from rusting and further improving the stability of the lock body.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A container door bidirectional self-locking safety fastener structure, characterized in that, It includes two mounting boxes (1), and a mounting tube (2) is rotatably connected inside the mounting box (1). A transmission gear (3) is fixedly sleeved on the outer surface of the mounting tube (2). Two external transmission racks (4) are meshed on the outer surface of the transmission gear (3). Two internal transmission racks (5) are provided behind the two external transmission racks (4) and meshed with the transmission gear (3). A fixing tube (6) is fixedly connected to both the external transmission racks (4) and the internal transmission racks (5) through a connecting plate. A limit block (7) is slidably connected to the outer surface of the fixing tube (6). One side of the external transmission rack (4) is provided with a self-locking mechanism connected to the mounting box (1). The self-locking mechanism is used to self-lock the external transmission rack (4) and the transmission gear (3).

2. The container door bidirectional self-locking safety fastener structure according to claim 1, characterized in that, The self-locking mechanism includes a self-locking post (11) slidably connected to an external transmission rack (4). A first spring (12) fixedly connected to the external transmission rack (4) is fixedly sleeved on the outer surface of the self-locking post (11). A snap-fit ​​box (13) is provided inside the mounting box (1). A self-locking hole (14) slidably connected to the self-locking post (11) is provided on the snap-fit ​​box (13). A transmission post (15) slidably connected to the mounting box (1) is slidably connected to the snap-fit ​​box (13). A first transmission wedge (16) is fixedly connected to the transmission post (15). A second transmission wedge (17) is slidably connected to one side of the first transmission wedge (16). A top post (18) slidably connected to the snap-fit ​​box (13) is fixedly connected to one side of the second transmission wedge (17). A second spring (19) fixedly connected to the snap-fit ​​box (13) is fixedly connected to one side of the second transmission wedge (17).

3. The container door bidirectional self-locking safety fastener structure according to claim 2, characterized in that, The outer surface of the transmission column (15) is fixedly sleeved with a third spring (190) that is fixedly connected to the mounting box (1), and one end of the self-locking column (11) is rotatably connected with a ball (191).

4. The container door bidirectional self-locking safety fastener structure according to claim 1, characterized in that, The outer surface of the transmission gear (3) is meshed with an intermediate transmission rack (21), and a transmission plate (22) is fixedly connected to one side of the intermediate transmission rack (21). A fixing post (23) that is slidably connected to the mounting box (1) is fixedly connected to the transmission plate (22), and a fixing hole (24) that is slidably connected to the fixing post (23) is provided on the mounting box (1).

5. The container door bidirectional self-locking safety fastener structure according to claim 1, characterized in that, Two oil injection pipes (31) are fixedly connected to the mounting pipe (2). An oil seepage hole (32) is opened on the outer surface of the fixed pipe (6). An oil supply mechanism is provided on the mounting box (1). The oil supply mechanism is used to supply oil to the mounting pipe (2) and the fixed pipe (6).

6. The container door bidirectional self-locking safety fastener structure according to claim 5, characterized in that, The oil supply mechanism includes an oil supply tank (41) fixedly connected to the mounting box (1), an extrusion plate (42) slidably connected inside the oil supply tank (41), an extrusion column (43) slidably connected to the oil supply tank (41) fixedly connected to one side of the extrusion plate (42), the outer surface of the mounting pipe (2) is fixedly connected to the oil supply tank (41) through a hose, and the outer surface of the fixing pipe (6) is fixedly connected to a hose fixedly connected to the oil supply tank (41).

7. The container door bidirectional self-locking safety fastener structure according to claim 6, characterized in that, An oil inlet pipe (44) is fixedly connected to the outer surface of the oil supply tank (41), and a sealing block is threaded onto the oil inlet pipe (44).

8. The container door bidirectional self-locking safety fastener structure according to claim 1, characterized in that, An installation block is fixedly connected to the installation box (1), and an installation hole is provided on the installation block.

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