An automatic locking and unlocking device for a container trailer

Abstract

The utility model discloses an automatic switch lock device for container trailer, including lock box, locating seat, lock head, lock bar, connecting rod drive mechanism and linear cylinder, locating seat fixedly embeds in the top of lock box, and lock head is established in the upper portion of locating seat through vertical shaft rotation, and the lower extreme of vertical shaft is worn out locating seat bottom end. The lock bar is horizontally arranged in the lower portion of lock box and is arranged in the dislocation with vertical shaft, and the perforation is seted up on the lateral wall of lock box, and the linear cylinder is installed in the opposite side with the perforation. Linear cylinder is linked with the lower extreme of vertical shaft and lock bar through connecting rod drive mechanism respectively, and under the working condition, linear cylinder drives lock head to rotate in 0~90 degree range relative to locating seat, simultaneously, drives lock bar to move along its axial direction, makes lock bar upper end portion can extend to the outside of lock box. The utility model discloses linear cylinder control lock bar telescoping and lock head rotation 90 degree and lock the goods cabinet or unlock, and the degree of automation is high, need not getting off manual operation, improves the convenience and security of operation.

Description

Technical Field

[0001] This utility model relates to the field of container trailer lock technology, specifically to an automatic lock opening and closing device for container trailers. Background Technology

[0002] During road transport, container trucks need to be locked to the trailer frame to ensure safety during acceleration, deceleration, and turning, thus preventing the danger of the container falling off the trailer frame. The secure connection between the container and the trailer typically uses an oblong-shaped buttonlock mounted on the trailer frame. The buttonlock's lock head is inserted into an oblong-shaped lock hole at the bottom corner of the container. By rotating the lock head 90° using a handle mounted on the buttonlock, the container is locked to the semi-trailer.

[0003] Currently, most container trailers require manual operation of multiple latches via levers, which is time-consuming, labor-intensive, and inefficient. During vehicle movement, the latches may open spontaneously due to bumps and vibrations, potentially causing the container to fall and resulting in an accident. Furthermore, port safety requirements necessitate that drivers remain in the cab throughout the entire port operation. Before entering or after leaving the port, the driver must stop the vehicle and manually operate the latches to lock the container to the trailer frame. This is especially problematic when turning within the port area, where empty containers also pose a risk of falling. Automatic locking and unlocking of the latches from inside the cab would significantly reduce safety hazards and improve transportation efficiency. Therefore, existing technology requires further improvement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to propose an automatic locking and unlocking device for container trailers, which solves the problem that the existing button locks require manual operation, which is time-consuming, laborious, and inefficient. During vehicle operation, the button locks may open on their own due to bumps and vibrations, which could cause the container to fall.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An automatic locking and unlocking device for a container trailer includes a lock box, a positioning seat, a lock head, a locking rod, a linkage transmission mechanism, and a linear cylinder. The positioning seat is fixedly embedded in the top of the lock box, with the upper part of the positioning seat located on the outside of the lock box. The locking rod, the linkage transmission mechanism, and the linear cylinder are all located on the inside of the lock box.

[0007] The lock head is located directly above the positioning seat. The lock head rotates with the positioning seat via a vertical shaft located at its bottom, with the lower end of the vertical shaft extending out of the bottom of the positioning seat.

[0008] The locking rod is horizontally positioned at the bottom of the lock box and is offset from the vertical axis. A through hole corresponding to the end position of the locking rod is provided on the side wall of the lock box, and a linear cylinder is installed on the side opposite to the through hole.

[0009] The piston rod end of the linear cylinder is connected to the lower end of the vertical shaft and the locking rod respectively through the connecting rod transmission mechanism. In the working state, the linear cylinder drives the vertical shaft and the locking head to rotate relative to the positioning seat in the range of 0° to 90° through the connecting rod transmission mechanism. At the same time, it drives the locking rod to move along its axial direction, so that the other end of the locking rod extends to the outside of the lock box or is retracted into the lock box.

[0010] Furthermore, the lock box is a square metal shell, including a top plate and four side plates. The corresponding ends of any two adjacent side plates are fixedly connected, and the upper end of each side plate is fixedly welded to the top plate as a whole.

[0011] The top plate has mounting holes, and the positioning seat passes through the inner side of the mounting holes. Its outer side wall is fixedly welded to the top plate as a whole.

[0012] Furthermore, the vertical shaft is a straight circular shaft, which passes through the inner side of the positioning seat and rotates with it. The upper end of the vertical shaft is fixedly connected to the bottom of the lock head, and its lower end is rotatably connected to the side wall of the lock box through a bearing seat.

[0013] Furthermore, the lock head is a four-sided pyramid with a rectangular bottom, and the positioning seat is a cuboid structure that matches the bottom shape of the lock head.

[0014] The upper end of the vertical shaft is fixedly connected to the bottom center of the lock head, and the lower edge of the lock head protrudes outward relative to the circumferential sidewall of the vertical shaft.

[0015] Furthermore, the linkage transmission mechanism includes a push rod, a crank, and a connecting rod. One end of the push rod is fixedly connected to the piston rod of the linear cylinder, and the other end is fixedly connected to the end of the locking rod away from the through hole.

[0016] One end of the crank is fixedly connected to the lower outer wall of the vertical shaft, one end of the connecting rod is rotatably connected to the other end of the crank, and the other end is rotatably connected to the push rod. During the extension of the piston rod of the linear cylinder, the push rod drives the crank and the vertical shaft to rotate clockwise through the connecting rod.

[0017] Furthermore, the push rod slides in conjunction with the lock box via a guide assembly. The guide assembly includes a linear guide rail and a guide slider. The linear guide rail is fixedly installed below the push rod via a bracket, and the guide slider is installed on the linear guide rail, with its top fixedly connected to the bottom of the push rod.

[0018] Furthermore, a guide sleeve is provided on the inner wall of the lock box. One end of the guide sleeve is fixedly connected to the periphery of the through hole, and its interior communicates with the through hole. The other end of the lock rod passes through the inner side of the guide sleeve and extends to the outside of the lock box through the through hole.

[0019] By adopting the above technical solution, the beneficial technical effects of this utility model are as follows: This utility model can control the rotation of its lock head within the range of 0° to 90° through a linear cylinder, thereby locking the container onto the trailer frame. The driver can complete the locking and unlocking from the cab, which has a high degree of automation, avoids the driver getting out of the vehicle to operate manually, improves the convenience of operation, and is suitable for special work sites with safety requirements. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the structural principle of an automatic locking and unlocking device for container trailers according to this utility model.

[0021] Figure 2 This is a diagram illustrating the working state of an automatic locking and unlocking device for container trailers according to this utility model. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings:

[0023] Combination Figure 1 and Figure 2 An automatic locking and unlocking device for container trailers includes a lock box 1, a positioning seat 2, a lock head 3, a locking rod 4, a linkage transmission mechanism 5, and a linear cylinder 6. The lock box 1 is a square metal shell, comprising a top plate 11 and four side plates 12. Corresponding ends of any two adjacent side plates 12 are fixedly connected, and the upper ends of each side plate 12 are fixedly welded to the top plate 11. The positioning seat 2 is fixedly embedded in the top of the lock box 1, with its upper part extending beyond the upper surface of the lock box 1. The locking rod 4, the linkage transmission mechanism 5, and the linear cylinder 6 are all located inside the lock box 1.

[0024] The lock head 3 is a solid four-sided pyramid with a rectangular bottom. The positioning seat 2 is a cuboid structure that matches the shape of the bottom of the lock head 3. The upper end of the vertical shaft 21 is fixedly connected to the bottom center of the lock head 3. The lower edge of the lock head 3 protrudes outward relative to the circumferential sidewall of the vertical shaft 21.

[0025] The top plate 11 has mounting holes adapted to the positioning seat 2. The positioning seat 2 is vertically inserted into the mounting holes, and its outer side wall is fixedly welded to the top plate 11. The inner side of the positioning seat 2 has a shaft hole that matches the vertical shaft 21. Specifically, the vertical shaft 21 is a straight round shaft, which is vertically inserted into the shaft hole of the positioning seat 2 and rotates with the positioning seat 2.

[0026] In addition, the lock head 3 is mounted above the positioning seat 2 via a vertical shaft 21 and is rotatably engaged with the positioning seat 2. The upper end of the vertical shaft 21 extends through the upper surface of the positioning seat 2 and is fixedly connected to the bottom of the lock head 3 as a whole. The lower end of the vertical shaft 21 extends through the bottom of the positioning seat 2 and is rotatably connected to the inner wall of the lock box 1 via a bearing seat 22.

[0027] The linear cylinder 6 is fixedly installed inside the left side of the lock box 1. The linear cylinder 6 is a conventional linear cylinder and is connected to the air system pipeline of the tractor. The output end of the linear cylinder 6 is connected to the lower end of the vertical shaft 21 through the linkage transmission mechanism 5 located inside the lock box 1, driving the vertical shaft 21 and the lock head 3 to rotate relative to the positioning seat 2 within the range of 0° to 90°. When the lock head 3 is at the 0° position, the length direction of the bottom surface of the lock head 3 is consistent with the length direction of the upper surface of the positioning seat 2. During the descent of the container, the upper part of the lock head 3 and the positioning seat 2 inserts into the lock hole located at the bottom of the container. When the lock head 3 rotates to the 90° position, it locks the container onto the trailer frame.

[0028] The locking rod 4 is horizontally arranged at the lower part of the lock box 1 and is offset from the vertical axis 21. Specifically, the locking rod 4 is located in front of the vertical axis 21 and is perpendicular to the vertical axis 21. A connector 41 is fixed to the left end of the locking rod 4, and the connector 41 is connected to the piston rod end of the linear cylinder 61 through the linkage transmission mechanism 5. A through hole 13 is opened on the right side wall of the lock box 1, corresponding to the position of the right end face of the locking rod 4. The linear cylinder 61 is located on the side opposite to the through hole 13, and the cylinder body of the linear cylinder 61 is fixedly connected to the lock box 1 through the cylinder seat at its bottom.

[0029] A guide sleeve 42 is provided on the right side wall of the lock box 2. The right end of the guide sleeve 42 is fixedly connected to the outer part of the lock box 1 located in the through hole 13. The interior of the guide sleeve 42 communicates with the through hole 13. The right end of the locking rod 4 passes through the inner side of the guide sleeve 42 and slides against the inner wall of the guide sleeve 42. The guide sleeve 42 restricts the radial displacement of the right end of the locking rod 4. In the working state, the linear cylinder 6 drives the locking rod 4 to move along its axial direction through the linkage transmission mechanism 5, so that the right end of the locking rod 4 extends to the outside of the lock box 1 through the through hole 13 or retracts into the lock box 1.

[0030] The linkage transmission mechanism 5 includes a push rod 51, a crank 52, and a connecting rod 53. The left end of the push rod 51 is fixedly connected to the piston rod end of the linear cylinder 6 by bolts, and the right end of the push rod 51 is fixedly connected to the connecting piece 41 located at the left end of the locking rod 4 by bolts. The lower end of the vertical shaft 21 is fixedly fitted with an annular sleeve 23, and one end of the crank 52 is fixedly connected to the outer circumferential wall of the lower end of the vertical shaft 21 as a whole.

[0031] A hinge seat 54 is fixedly installed on the top of the push rod 51 near the linear cylinder 6. The left end of the connecting rod 51 is rotatably connected to the hinge seat 54 through a pin, and the right end of the connecting rod 51 is rotatably connected to the other end of the crank 52 through the same pin. During the extension of the piston rod of the linear cylinder, the push rod drives the crank and the vertical shaft to rotate clockwise through the connecting rod. During the retraction of the piston rod of the linear cylinder, the push rod drives the crank and the vertical shaft to rotate counterclockwise through the connecting rod.

[0032] In a preferred embodiment, the push rod 51 is slidably engaged with the lock box 1 via a guide assembly. The guide assembly includes a linear guide rail 71 and a guide slider 72. The linear guide rail 71 is fixedly mounted below the push rod 51 via a bracket, and the guide slider 72 is slidably disposed on the linear guide rail 71. The top of the guide slider 72 is fixedly connected to the bottom of the push rod 51. The guide assembly can overcome the reaction force of the connecting rod 51 on the push rod 51, improving the stability of the push rod 51's movement and the service life of the linear guide rail 71.

[0033] In operation, the piston rod of the linear cylinder 6 is at the rear dead center of its stroke. The piston rod drives the locking rod 4 to move linearly to the right via the push rod 51. The piston rod stops moving after reaching the front dead center of its stroke. During the process of the piston rod moving from the rear dead center to the front dead center, the right end of the locking rod 4 extends to the outside of the lock box 1 through the through hole 13 and passes into the lock hole located on the side of the container, locking the container to the trailer frame. At the same time, as the push rod 51 moves to the right, it drives the lock head 3 to rotate clockwise around the vertical axis 21 via the connecting rod 53. When the piston rod reaches the front dead center of its stroke, the lock head 3 locks the container above the lock box 1 to the frame of the container trailer.

[0034] When the container is placed on one side of the rotary lock device, the linear cylinder 6 drives the end of the locking rod 4 through the linkage mechanism 5 to extend to the outside of the lock box 1 and penetrate to the destination. After reaching the destination, the linear cylinder 6 drives the end of the locking rod 4 through the linkage mechanism 5 to exit from the lock hole located on the side of the container, thus releasing the lock. The linkage mechanism 5 of this pneumatic rotary lock device adopts a double linkage structure, which can simultaneously control the lock head 3 and the locking rod 4 to lock containers with different installation methods, improving the versatility of the rotary lock device and making it suitable for both large and small containers.

[0035] The pneumatic rotary lock device is installed at the end of the front or rear crossbeam of the container trailer. Specifically, the lock box 1 of the pneumatic rotary lock device is fixedly welded to the end of the front or rear crossbeam. The upper surface of the top plate 11 of the lock box 1 is at the same level as the upper surface of the crossbeam it is located on. Each container trailer is equipped with four pneumatic rotary lock devices, and the four containers are located at the four corners of the trailer. The linear cylinder 6 of the pneumatic rotary lock device is supplied with air by the air circuit system of the tractor. In addition, the signal end of the linear cylinder 6 is connected to the control system located in the tractor, and the working state of the linear cylinder 6 is controlled by a switch located in the cab. According to the command, the linear cylinder 6 simultaneously drives the lock head 3 to rotate and the lock rod 4 to extend and retract through the chain drive mechanism 5. It is suitable for locking and unlocking containers on the frame in different placement positions or methods, and meets the usage requirements of both flatbed trailers and gooseneck trailers.

[0036] Due to the different types of container containers, they are divided into large containers and small containers according to their length. When installing on a trailer, the small container needs to be placed at the front or rear of the trailer frame and pressed against the top of the front or rear crossbeam. The large container is placed between the adjacent rear side of the front crossbeam and the adjacent front side of the rear crossbeam. When the container is placed on top of the front or rear crossbeam, the lock head 3 of the pneumatic rotary lock device locks the container to the trailer frame. When the container is placed on the adjacent rear side of the front crossbeam or the adjacent front side of the rear crossbeam, the locking rod 4 of the pneumatic rotary lock device extends from the inside of the lock box 1 to lock the container to the trailer frame.

[0037] The parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An automatic locking and unlocking device for a container trailer, characterized in that, It includes a lock box, a positioning seat, a lock head, a lock rod, a linkage transmission mechanism, and a linear cylinder. The positioning seat is fixedly embedded in the top of the lock box, with the upper part of the positioning seat located on the outside of the lock box. The lock rod, the linkage transmission mechanism, and the linear cylinder are all located on the inside of the lock box. The lock head is located directly above the positioning seat. The lock head is rotatably engaged with the positioning seat via a vertical shaft located at its bottom. The lower end of the vertical shaft extends out of the bottom of the positioning seat. The locking rod is horizontally positioned at the bottom of the lock box and is offset from the vertical axis. A through hole corresponding to the end position of the locking rod is provided on the side wall of the lock box, and a linear cylinder is installed on the side opposite to the through hole. The piston rod end of the linear cylinder is connected to the lower end of the vertical shaft and the locking rod respectively through the connecting rod transmission mechanism. In the working state, the linear cylinder drives the vertical shaft and the locking head to rotate relative to the positioning seat in the range of 0° to 90° through the connecting rod transmission mechanism. At the same time, it drives the locking rod to move along its axial direction, so that the other end of the locking rod extends to the outside of the lock box or is retracted into the lock box.

2. An automatic locking and unlocking device for a container trailer according to claim 1, characterized in that The lock box is a square metal shell, including a top plate and four side plates. The corresponding ends of any two adjacent side plates are fixedly connected, and the upper end of each side plate is fixedly welded to the top plate as a whole. The top plate has mounting holes, and the positioning seat passes through the inner side of the mounting holes. Its outer side wall is fixedly welded to the top plate as a whole.

3. An automatic locking and unlocking device for a container trailer according to claim 1, characterized in that, The vertical shaft is a straight circular shaft. It passes through the inner side of the positioning seat and rotates with it. The upper end of the vertical shaft is fixedly connected to the bottom of the lock head, and its lower end is rotatably connected to the side wall of the lock box through a bearing seat.

4. An automatic locking and unlocking device for a container trailer according to claim 3, characterized in that The lock head is a square pyramid with a rectangular bottom, and the positioning seat is a cuboid structure that matches the shape of the bottom of the lock head; The upper end of the vertical shaft is fixedly connected to the bottom center of the lock head, and the lower edge of the lock head protrudes outward relative to the circumferential sidewall of the vertical shaft.

5. An automatic locking and unlocking device for a container trailer according to claim 1, wherein The linkage transmission mechanism includes a push rod, a crank, and a connecting rod. One end of the push rod is fixedly connected to the piston rod of the linear cylinder, and the other end is fixedly connected to the end of the locking rod away from the through hole. One end of the crank is fixedly connected to the lower outer wall of the vertical shaft, one end of the connecting rod is rotatably connected to the other end of the crank, and the other end is rotatably connected to the push rod. During the extension of the piston rod of the linear cylinder, the push rod drives the crank and the vertical shaft to rotate clockwise through the connecting rod.

6. An automatic locking and unlocking device for a container trailer according to claim 5, characterized in that The push rod slides into the lock box via a guide assembly. The guide assembly includes a linear guide rail and a guide slider. The linear guide rail is fixedly installed below the push rod via a bracket, and the guide slider is installed on the linear guide rail, with its top fixedly connected to the bottom of the push rod.

7. An automatic locking and unlocking device for a container trailer according to claim 1, wherein A guide sleeve is provided on the inner wall of the lock box. One end of the guide sleeve is fixedly connected to the periphery of the through hole, and its interior communicates with the through hole. The other end of the lock rod passes through the inner side of the guide sleeve and extends to the outside of the lock box through the through hole.

Images