A concealed box van door lock

Abstract

The utility model relates to the technical field of automobile parts, disclose a hidden box type truck door lock, a hidden box type truck door lock, including the box door, the box door bottom fixedly connected with the rod sleeve, the rod sleeve inside slide connection has the main lock bar, the main lock bar top fixedly connected with power transmission assembly, the main lock bar front fixedly connected with the lock hole seat, the main lock bar front fixedly connected with the secondary lock pin, the secondary lock pin fixedly connected in the lock hole seat top, the rod sleeve outside fixedly connected with the outer protective cover, the main lock bar top abuts with the buffer rubber mat, the lock hole seat front fixedly connected with the anti -prying cover, the anti -prying cover inboard rotationally connected with the anti -prying clamping plate. In the utility model, the anti -prying cover and the clamping plate enhance the anti -cracking ability, the dust bellows and the outer protective cover improve the environmental adaptability, and the power transmission assembly guarantees the stable operation and reduces the interference.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a concealed box truck door lock. Background Technology

[0002] Box truck door locks are key components for ensuring the sealing of cargo boxes and the safety of goods. They are mainly used for locking the cargo box doors of box trucks, logistics vehicles, etc. The overall design emphasizes safety, durability, and ease of operation. The operation design allows for quick opening and closing, and simple daily maintenance is required to maintain performance.

[0003] The most commonly used locks for van doors are mainly divided into three types: pin tumbler locks, wafer locks, and electronic locks. In pin tumbler locks, a key is inserted into the lock cylinder, and when it is turned, it causes the pins at different heights to match the key teeth, pushing the bolt back to unlock. In wafer locks, the unique arrangement of the wafers unlocks the lock. When the key is inserted, the wafers are raised to a specific position, allowing the lock cylinder to rotate and thus moving the bolt. Electronic locks typically use an electronic control system, controlling the opening and closing of the bolt via a password or fingerprint. They generally consist of an electronic control module, a motor, a battery, and a mechanical lock body. After the user enters the correct password or verifies their fingerprint, the electronic control module drives the motor to move the bolt.

[0004] In pin tumbler locks, the internal structure relies solely on a single row of pins matching the key teeth for locking. Since the lock is exposed, it can be easily cracked using simple techniques. In leaf locks, the core structure depends on the precise fit between the metal leaf and the lock cylinder shaft. In high-temperature, extremely cold, or high-humidity environments, without proper concealment and protection, the leaf is easily affected by the environment, causing it to jam and fail to spring back. In electronic locks, the exposed keypad is highly susceptible to external environmental influences, leading to button malfunctions, misidentification, and other problems, impacting logistics efficiency. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a concealed box truck door lock, which aims to improve the problems of high risk of technical cracking, poor environmental adaptability, and easy interference with operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A concealed box truck door lock includes a box door, characterized in that: a rod sleeve is fixedly connected to the bottom of the box door, a main locking rod is slidably connected inside the rod sleeve, a power transmission assembly is fixedly connected to the top of the main locking rod, a lock hole seat is fixedly connected to the front of the main locking rod, limit protrusions are fixed on both the left and right sides inside the rod sleeve, a secondary locking pin is fixedly connected to the front of the main locking rod, the secondary locking pin is fixedly connected to the top of the lock hole seat, a safety lever is fixedly connected to the right side of the secondary locking pin, an outer protective cover is fixedly connected to the outside of the rod sleeve, a buffer pad abuts against the top of the main locking rod, an anti-pry cover is fixedly connected to the front of the lock hole seat, an anti-pry plate is rotatably connected to the inner side of the anti-pry cover, a plate lever is fixedly connected to the outer side of the anti-pry plate, and the plate lever is fixedly connected to the inner side of the anti-pry cover.

[0008] As a further description of the above technical solution:

[0009] The power transmission assembly includes a drive link, which is fixedly connected to the top of the main lock rod. A transmission swing arm is fixedly connected to the top of the drive link, and a handle shaft is fixedly connected to the top of the transmission swing arm. An operating handle is fixedly connected to the right side of the handle shaft.

[0010] As a further description of the above technical solution:

[0011] A connecting rod pin is fixedly connected to the top of the main locking rod, and the connecting rod pin is fixedly connected to the front of the drive connecting rod.

[0012] As a further description of the above technical solution:

[0013] A dustproof corrugated pipe is fixedly connected to the front part of the rod sleeve, and the dustproof corrugated pipe is fixedly connected to the rear part of the lock hole seat.

[0014] As a further description of the above technical solution:

[0015] The sleeve has a guide groove inside, and the main locking rod is slidably connected inside the guide groove.

[0016] As a further description of the above technical solution:

[0017] A locking plate spring is fixedly connected to the outer side of the anti-pry plate, and the other end of the locking plate spring is fixedly connected to the inner side of the anti-pry cover.

[0018] As a further description of the above technical solution:

[0019] Guide sliders are fixedly connected to both the left and right sides of the main locking rod, and wear-resistant bushings are fixedly connected to the outer side of the main locking rod. The wear-resistant bushings are fixedly connected inside the rod sleeve.

[0020] As a further description of the above technical solution:

[0021] A locking pin sleeve is fixedly connected to the outside of the secondary locking pin.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the anti-pry cover and the anti-pry plate work together to effectively block external violent prying. The plate spring provides continuous pressure to the anti-pry plate, making it fit tightly and improving the protection. With the double protection of the secondary lock pin and the safety lever, the lock pin sleeve enhances the structural strength of the secondary lock pin, greatly reducing the risk of the door lock being technically cracked.

[0024] 2. In this utility model, the dustproof corrugated pipe can prevent dust and impurities from entering the lock body and keep the lock body clean. The anti-wear bushing can reduce the wear of the main lock rod and the rod sleeve and extend the service life of the components. The outer protective cover provides external protection for the rod sleeve, resisting external collisions and corrosion, so that the door lock can still work stably under complex working conditions and adapt to different environments.

[0025] 3. In this utility model, the power transmission component has a stable structure, and the drive linkage, transmission swing arm, and other components are precisely matched. The linkage pin enhances the stability of the connection. The guide groove and guide slider ensure smooth sliding of the main locking rod, the limiting protrusion prevents excessive sliding of the main locking rod, reduces jamming and interference during operation, and the buffer rubber pad reduces the impact on the top of the main locking rod, improving ease of use and comfort. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a concealed box truck door lock proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the transmission swing arm structure of a concealed box truck door lock proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the drive linkage structure of a concealed box truck door lock proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the rod sleeve structure of a concealed box truck door lock proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the secondary locking pin connection structure of a concealed box truck door lock proposed in this utility model.

[0031] Legend:

[0032] 1. Box door; 2. Rod sleeve; 3. Main locking rod; 4. Drive linkage; 5. Linkage pin; 6. Transmission swing arm; 7. Handle shaft; 8. Operating handle; 9. Lock hole seat; 10. Limiting protrusion; 11. Dustproof corrugated pipe; 12. Secondary locking pin; 13. Safety lever; 14. Outer protective cover; 15. Buffer pad; 16. Anti-pry cover; 17. Guide groove; 18. Anti-pry plate; 19. Plate lever; 20. Plate spring; 21. Guide slider; 22. Locking pin sleeve; 23. Anti-wear bushing. Detailed Implementation

[0033] 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 one system embodiment of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-5This utility model provides an embodiment of a concealed box truck door lock, including a box door 1, which serves as the installation base for the door lock. It not only provides a stable load-bearing platform for the entire door lock system, but its own structural strength can also indirectly enhance the overall stability of the door lock. All door lock-related components are directly or indirectly connected to the box door 1, making the door lock and the box body form a tight whole. During the frequent opening and closing of the box door 1, the force on the door lock can be effectively distributed, ensuring the door lock functions stably and avoiding the impact of the door lock performance due to the shaking of the box door 1. A rod sleeve 2 is fixedly connected to the bottom of the box door 1, and a main locking rod 3 is slidably connected inside the rod sleeve 2. A power transmission component is fixedly connected to the top of the main locking rod 3. The rod sleeve 2 provides space for the main locking rod 3 to be accommodated and move, and the smoothness of its inner wall can reduce the resistance when the main locking rod 3 slides. The main locking rod 3 provides dual protection and guidance. It restricts the main locking rod 3 to slide only along the preset track to prevent deviation, and also prevents external debris, rainwater and other substances from directly contacting the main locking rod 3, keeping the main locking rod 3 dry and clean, creating a stable working environment for it, and ensuring the long-term smooth operation of the main locking rod 3. As the core transmission and locking component of the door lock, the strength of the material of the main locking rod 3 directly determines the durability of the door lock. The door lock achieves locking and unlocking through precise sliding. When connecting key components, it can efficiently transmit the force from the power transmission component to the locking structure, driving related components to work together to ensure precise locking or unlocking. It also provides sufficient locking force in the locked state to prevent accidental opening of the door 1. A lock hole seat 9 is fixedly connected to the front of the main lock rod 3. As a key part of the lock's engagement with the lock body, the lock hole seat 9 tightly engages with the corresponding lock body structure when the lock is locked, increasing the contact area and enhancing the locking effect. This prevents the lock from loosening when the vehicle is bumpy. Limiting protrusions 10 are fixed on both the left and right sides inside the rod sleeve 2. These limiting protrusions 10 strictly limit the sliding stroke of the main lock rod 3, precisely preventing it from sliding excessively beyond its normal operating range and avoiding damage to other parts due to excessive sliding. In case of component collision damage or failure of the door lock to lock or open normally, to ensure the safety of the door lock operation, a secondary locking pin 12 is fixedly connected to the front of the main locking rod 3. The locking direction of the secondary locking pin 12 is complementary to that of the main locking rod 3, forming a double locking structure with the main locking rod 3. Based on the locking of the main locking rod 3, it further penetrates into the lock body to enhance the locking strength of the door lock, making the door lock more resistant to external forces and less likely to be pried open, greatly improving the safety of the door lock and providing more reliable protection for the goods inside the box. The secondary locking pin 12 is fixedly connected to the top of the lock hole seat 9, and a safety lever 13 is fixedly connected to the right side of the secondary locking pin 12. The safety lever 13 has moderate actuation force, which is convenient for operators to operate quickly and is used to control the working state of the secondary locking pin 12. When the safety lever 13 is in the locked position, it can firmly fix the secondary locking pin 12 and prevent it from accidentally extending or retracting.When unlocking, the secondary locking pin 12 can be released smoothly, increasing the safety and flexibility of the door lock operation and preventing door lock failure due to misoperation. An outer protective cover 14 is fixedly connected to the outside of the rod sleeve 2. The outer protective cover 14 completely covers the rod sleeve 2 and some connecting parts, providing comprehensive external protection for the rod sleeve 2 and internal main locking rod 3 and other components. It can resist external collisions, squeezing, scratches, and other external force damage that may be encountered during vehicle operation, while also isolating it from the high temperature of direct sunlight and rain erosion, slowing down the aging of components, thereby extending the service life of the door lock. The top of the main locking rod 3... The main locking rod 3 is abutted by a buffer pad 15. The thickness and elasticity of the buffer pad 15 have been optimized. When the main locking rod 3 slides to its limit position, it can quickly absorb the impact force between the main locking rod 3 and other components, transforming the hard collision into a soft contact. This significantly reduces the noise and vibration generated by the collision and prevents the components from cracking, deforming, or being damaged due to long-term collisions. At the same time, it allows the operator to feel a softer feedback during operation, improving the comfort of operation. The front of the lock hole seat 9 is fixedly connected to an anti-pry cover 16. The anti-pry cover 16 provides comprehensive shielding and protection for the lock hole seat 9 and its internal locking structure. This creates a robust external barrier, preventing lock-picking tools from directly contacting the locking components, increasing the difficulty of using such tools, and making it harder for criminals to apply effective force to pry the lock. This significantly improves the lock's anti-pry performance. The inner side of the anti-pry cover 16 is rotatably connected to an anti-pry plate 18, whose length and angle are rationally designed to completely cover key locking parts when closed. Together with the anti-pry cover 16, it forms double protection. Based on the blocking effect of the anti-pry cover 16, its rotational characteristics cause the anti-pry plate 18 to fit more tightly when a lock-picking tool attempts to penetrate, further enhancing the lock's anti-pry performance. To prevent the intrusion of lock-picking tools and increase the difficulty of entry, the anti-pry capability of the door lock is significantly enhanced. A latch lever 19 is fixedly connected to the outer side of the anti-pry plate 18. The end of the lever has anti-slip texture. Operators can easily control the rotation of the anti-pry plate 18 by moving the latch lever 19, which is labor-saving and convenient. It allows for quick opening or closing of the anti-pry plate 18, ensuring it can be flexibly opened when unlocking and tightly closed when locking, reliably maintaining its working or non-working state according to actual needs. The latch lever 19 is fixedly connected to the inner side of the anti-pry cover 16.

[0035] Reference Figure 2 The power transmission assembly includes a drive link 4, which is fixedly connected to the top of the main lock rod 3. A transmission swing arm 6 is fixedly connected to the top of the drive link 4, and a handle shaft 7 is fixedly connected to the top of the transmission swing arm 6. An operating handle 8 is fixedly connected to the right side of the handle shaft 7.

[0036] Reference Figure 3The top of the main locking rod 3 is fixedly connected to a connecting rod pin 5, which is fixedly connected to the front of the drive connecting rod 4. The surface of the connecting rod pin 5 is specially treated to reduce friction with the connection parts, which can enhance the stability of the connection between the main locking rod 3 and the drive connecting rod 4. During the power transmission process, even if it is subjected to frequent forces, it can ensure that there is no loosening or relative displacement between the main locking rod 3 and the drive connecting rod 4, ensuring that the force is efficiently and accurately transmitted from the drive connecting rod 4 to the main locking rod 3, avoiding power loss and maintaining the sensitivity of the door lock operation.

[0037] Reference Figure 1 A dustproof corrugated tube 11 is fixedly connected to the front of the sleeve 2. The dustproof corrugated tube 11 is fixedly connected to the rear of the lock hole seat 9. The dustproof corrugated tube 11 is made of a highly elastic material and can freely extend and retract with the sliding of the main lock rod 3. It effectively blocks dust, sand, moisture and other impurities from entering the inside of the sleeve 2, preventing impurities from adhering to the surface of the main lock rod 3 and other internal components, preventing the components from rusting or jamming, maintaining the normal working state of the components, and significantly extending the service life of the door lock. A plate spring 20 is fixedly connected to the outside of the anti-pry plate 18. The other end of the plate spring 20 is fixedly connected to the inside of the anti-pry cover 16. The elastic force of the plate spring 20 has been precisely adjusted to provide continuous and stable elastic force for the anti-pry plate 18, so that the anti-pry plate 18 can fit tightly against the inside of the anti-pry cover 16 when not in operation. It will not loosen on its own due to factors such as vehicle vibration, and always maintain the working position of the anti-pry plate 18 to ensure that it can immediately play an anti-pry role when faced with lock prying.

[0038] Reference Figure 3 and Figure 4The sleeve 2 has a guide groove 17 inside, and the main locking rod 3 is slidably connected inside the guide groove 17. The cross-sectional shape of the guide groove 17 is adapted to the main locking rod 3, and the inner wall is finely polished to provide precise guidance for the sliding of the main locking rod 3. This ensures that the main locking rod 3 maintains a stable posture during sliding, without lateral deviation or vertical wobbling, and avoids unnecessary friction and jamming between the main locking rod 3 and the inner wall of the sleeve 2, ensuring the smoothness and accuracy of the door lock operation. Guide sliders 21 are fixedly connected to both sides of the main locking rod 3. The guide sliders 21 are made of wear-resistant material, and their shape perfectly matches the guide groove 17. They work in conjunction with the guide groove 17 inside the sleeve 2 to form a sliding pair, further enhancing the sliding of the main locking rod 3. The guiding accuracy and stability are improved by converting the surface contact between the main locking rod 3 and the guide groove 17 into point contact, reducing the friction area and frictional resistance between the main locking rod 3 and the guide groove 17. This makes the main locking rod 3 slide more smoothly and reduces the operating force required by the operator. An anti-wear bushing 23 is fixedly connected to the outside of the main locking rod 3 and is fixedly connected inside the rod sleeve 2. The inner wall of the anti-wear bushing 23 is smooth and has a certain degree of elasticity, which can convert the direct metal friction between the main locking rod 3 and the rod sleeve 2 into friction between the bushing and both of them. This significantly reduces the wear rate of the components. At the same time, its own lubrication characteristics reduce sliding resistance, making the main locking rod 3 slide more smoothly in the rod sleeve 2, ensuring the flexibility of door lock operation, and reducing the failure rate caused by wear.

[0039] Reference Figure 5 A locking pin sleeve 22 is fixedly connected to the outside of the secondary locking pin 12. The locking pin sleeve 22 provides comprehensive protection and reinforcement for the secondary locking pin 12, disperses the external force on the secondary locking pin 12, improves the structural strength and wear resistance of the secondary locking pin 12, prevents the secondary locking pin 12 from deforming or being damaged due to excessive local stress during frequent expansion and contraction and stress, effectively extends the service life of the secondary locking pin 12, and ensures the long-term effectiveness of the double locking structure.

[0040] Working principle: When locking the door, turn the operating handle 8, which drives the transmission swing arm 6 to swing through the handle shaft 7. The transmission swing arm 6 pulls the drive linkage 4, which in turn causes the main locking rod 3 to slide in the guide groove 17 of the rod sleeve 2. The lock hole seat 9 at the front of the main locking rod 3 moves accordingly to achieve initial locking. At the same time, the secondary locking pin 12 completes secondary locking under the action of the lock hole seat 9. The safety lever 13 can be moved to the locked position to strengthen the safety. The anti-pry plate 18 on the inner side of the anti-pry cover 16 is locked by the plate spring 20. It can be released by the plate lever 19. When unlocking, operate the operating handle 8 in the opposite direction. The main locking rod 3 slides in the opposite direction. All locking components are reset. The dustproof bellows 11 moves and extends with the lock hole seat 9. The outer protective cover 14 protects the internal components throughout the process. The buffer rubber pad 15 reduces the impact of the main locking rod 3. The limiting protrusion 10 limits the sliding range of the main locking rod 3. The guide slider 21 and the anti-wear bushing 23 ensure smooth sliding and reduce wear.

[0041] 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 the system technical features therein. 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 concealed box truck door lock, comprising a box door (1), characterized in that: The bottom of the door (1) is fixedly connected to a rod sleeve (2), and a main locking rod (3) is slidably connected inside the rod sleeve (2). A power transmission assembly is fixedly connected to the top of the main locking rod (3), and a lock hole seat (9) is fixedly connected to the front of the main locking rod (3). Limiting protrusions (10) are fixed on both the left and right sides inside the rod sleeve (2). A secondary locking pin (12) is fixedly connected to the front of the main locking rod (3), and the secondary locking pin (12) is fixedly connected to the top of the lock hole seat (9). A safety lever (13) is fixedly connected to the right side of the pin (12). An outer protective cover (14) is fixedly connected to the outside of the rod sleeve (2). A buffer pad (15) abuts against the top of the main locking rod (3). An anti-pry cover plate (16) is fixedly connected to the front of the lock hole seat (9). An anti-pry plate (18) is rotatably connected to the inside of the anti-pry cover plate (16). A plate lever (19) is fixedly connected to the outside of the anti-pry plate (18). The plate lever (19) is fixedly connected to the inside of the anti-pry cover plate (16).

2. The concealed box truck door lock according to claim 1, characterized in that: The power transmission assembly includes a drive link (4), which is fixedly connected to the top of the main lock rod (3). A transmission swing arm (6) is fixedly connected to the top of the drive link (4), and a handle shaft (7) is fixedly connected to the top of the transmission swing arm (6). An operating handle (8) is fixedly connected to the right side of the handle shaft (7).

3. A concealed van door lock according to claim 1, characterized in that: The top of the main locking rod (3) is fixedly connected to a connecting rod pin (5), which is fixedly connected to the front of the drive connecting rod (4).

4. A concealed van door lock according to claim 1, characterized in that: The front part of the rod sleeve (2) is fixedly connected to a dustproof corrugated pipe (11), which is fixedly connected to the rear part of the lock hole seat (9).

5. A concealed van door lock according to claim 1, characterized in that: The rod sleeve (2) is provided with a guide groove (17) inside, and the main locking rod (3) is slidably connected inside the guide groove (17).

6. A concealed van door lock according to claim 1, characterized in that: A plate spring (20) is fixedly connected to the outside of the anti-pry plate (18), and the other end of the plate spring (20) is fixedly connected to the inside of the anti-pry cover plate (16).

7. A concealed van door lock according to claim 1, characterized in that: Guide sliders (21) are fixedly connected to both the left and right sides of the main locking rod (3). Anti-wear bushings (23) are fixedly connected to the outside of the main locking rod (3). The anti-wear bushings (23) are fixedly connected inside the rod sleeve (2).

8. A concealed van door lock according to claim 1, characterized in that: A locking pin sleeve (22) is fixedly connected to the outside of the secondary locking pin (12).

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