A double-linkage rotary lock device for container trailers

Abstract

This utility model discloses a double-linkage rotary lock device for container trailers, including a lock box, a positioning sleeve, a lock head, a lock rod, a chain drive mechanism, and a stepper motor. The positioning sleeve is fixedly embedded in the top of the lock box, with its upper end protruding from the upper surface of the lock box. The lock head is mounted above the positioning sleeve via a rotating shaft and rotates with the positioning sleeve. The lower end of the rotating shaft protrudes from the bottom of the positioning sleeve. The stepper motor is located inside the lock box on one side, and its output end is connected to the lower end of the rotating shaft via the chain drive mechanism, driving the rotating shaft and the lock head to rotate. The lock rod is arranged laterally inside the lock box on one side, and slides with the lock box along its axial direction. One end of the lock rod is connected to the output end of the stepper motor via a gear and rack mechanism, driving the other end of the lock rod to extend to the outside of the lock box. This utility model simultaneously controls the rotation of the lock head and the extension and retraction of the lock rod through a motor, achieving a high degree of automation. Locking and unlocking can be completed from the cab, avoiding manual operation by the driver and improving the convenience and safety of operation.

Description

Technical Field

[0001] This utility model relates to the field of trailer lock technology, specifically to a double-linkage rotary lock 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 a double-linkage rotary lock device for container trailers, which solves the problem that the existing rotary locks require manual operation, which is time-consuming, laborious, and inefficient. During vehicle operation, the rotary 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] A double-linkage rotary lock device for a container trailer includes a lock box, a positioning sleeve, a lock head, a lock rod, a chain drive mechanism, and a motor. The positioning sleeve is fixedly embedded in the top of the lock box, and the upper end of the positioning sleeve protrudes from the upper surface of the lock box.

[0007] The lock head is mounted above the positioning sleeve via a rotating shaft and rotates in conjunction with the positioning sleeve. The lower end of the rotating shaft extends out of the bottom of the positioning sleeve. The motor is located inside the lock box on one side, and its output end is connected to the lower end of the rotating shaft via the chain drive mechanism, driving the rotating shaft and the lock head to rotate relative to the positioning sleeve.

[0008] The locking rod is arranged laterally inside the lock box and is located on the side opposite to the motor. The locking rod slides along its axis with the lock box.

[0009] One end of the locking lever is connected to the output end of the motor through a gear and rack mechanism, driving the other end of the locking lever to extend to the outside of the lock box or retract 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 to form a whole.

[0011] The motor is a stepper motor. A transmission shaft is vertically installed on one side of the lock box. The transmission shaft is rotatably connected to the lock box through a bearing seat, and its lower end is connected to the output shaft of the stepper motor through a coupling.

[0012] Furthermore, the rotating shaft is a straight round shaft that is vertically inserted inside the positioning sleeve. Its upper end extends out of the upper end face of the positioning sleeve and is fixedly connected to the bottom of the lock head as one piece. The lower end of the rotating shaft is rotatably connected to the side wall of the lock box through the second bearing seat.

[0013] Furthermore, the chain drive mechanism includes a driving sprocket, a driven sprocket, and a chain. The driving sprocket is fixedly sleeved on the outside of the drive shaft, the driven sprocket is located below the positioning sleeve and fixedly sleeved on the outside of the rotating shaft, and the driven sprocket is connected to the driving sprocket through the chain.

[0014] Furthermore, the gear and rack mechanism includes a gear and a spur rack. The gear is fixedly sleeved on the outside of the transmission shaft, and the spur rack is located on one side of the gear and is laterally slidingly engaged with the inner wall of the lock box through a linear guide assembly. The tooth profile of the spur rack meshes with the gear.

[0015] Furthermore, one end of the locking rod is fixedly connected to the corresponding end of the rack via a connector, and a through hole corresponding to the position of the locking rod end is provided on the side wall of the lock box.

[0016] A guide sleeve is fixed on the inner wall of the lock box, and a through hole communicates with the inside of the guide sleeve. The other end of the lock rod passes through the inner side of the guide sleeve and can extend to the outside of the lock box through the through hole located on the side wall of the lock box.

[0017] Furthermore, the linear guide assembly includes linear guide rails and guide blocks. There are two linear guide rails, arranged parallel to each other with one above the other. Each linear guide rail is equipped with two guide blocks, each guide block slidingly engaging with its corresponding linear guide rail. All guide blocks are fixedly connected to the rack.

[0018] By adopting the above technical solution, the beneficial technical effects of this utility model are as follows: This utility model can control its lock head to rotate within the range of 0° to 90° by a stepper motor, and at the same time control the lock rod to extend to the outside of the lock box, so as to lock containers in different placement positions on the trailer frame. The driver can complete the locking and unlocking in the cab. It 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

[0019] Figure 1 This is a schematic diagram illustrating the structural principle of a double-linkage rotary lock device for container trailers according to this utility model.

[0020] Figure 2 This is a diagram illustrating the working state of a double-linkage rotary lock device for container trailers according to this utility model. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings:

[0022] Combination Figure 1 and Figure 2 A double-linkage rotary lock device for container trailers includes a lock box 1, a positioning sleeve 2, a lock head 3, a lock rod 4, a chain drive mechanism 5, and a stepper motor 6. The lock box 1 is a square metal shell, including a top plate 11 and four side plates 12. The corresponding ends of any two adjacent side plates 12 are fixedly connected, and the upper end of each side plate 12 is fixedly welded to the top plate 11. The positioning sleeve 2 is fixedly embedded in the top of the lock box 1, and the upper end of the positioning sleeve 2 protrudes from the upper surface of the lock box 1.

[0023] The lock head 3 is a rectangular solid cone with a rectangular base. The positioning sleeve 2 is a cuboid structure that matches the bottom of the lock head 3. The top plate 11 has a mounting hole that fits the positioning sleeve 2. The positioning sleeve 2 is vertically inserted into the mounting hole, and its outer wall is fixedly welded to the top plate 11. The inner side of the positioning sleeve 2 has a shaft hole that matches the rotating shaft 21. Specifically, the rotating shaft 21 is a straight round shaft that is vertically inserted into the shaft hole of the positioning sleeve 2 and rotates with the positioning sleeve 2.

[0024] Additionally, the lock head 3 is positioned above the positioning sleeve 2 via a rotating shaft 21 and rotatably engages with the positioning sleeve 2. The upper end of the rotating shaft 21 extends through the upper surface of the positioning sleeve 2 and is fixedly connected to the bottom of the lock head 3 as a single unit. The lower end of the rotating shaft 21 extends through the bottom of the positioning sleeve 2 and is rotatably connected to the inner wall of the lock box 1 via a bearing seat 22. The lock head 3 can rotate relative to the positioning sleeve 2 within a range of 0° to 90°. When the lock head 3 is at the 0° position, the length direction of the lock head 3 is consistent with the length direction of the positioning sleeve 2. During the descent of the container, the upper part of the lock head 3 and the positioning sleeve 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.

[0025] The stepper motor 6 is fixedly installed inside the lock box 1 on one side. The stepper motor 6 is a stepper motor with an angle position locking function, which is a common technology. The output end of the stepper motor 6 is connected to the lower end of the rotating shaft 21 through the chain drive mechanism 5, driving the rotating shaft 21 and the lock head 3 to rotate relative to the positioning sleeve 2. Specifically, a transmission shaft 61 is vertically provided on one side of the lock box 1. The transmission shaft 61 is rotatably engaged with the lock box 1 through a bearing seat 62, and its lower end is connected to the output shaft of the stepper motor 6 through a coupling 63.

[0026] The chain drive mechanism 5 includes a drive sprocket 51, a driven sprocket 52, and a chain 53. The drive sprocket 51 is fixedly sleeved on the outside of the drive shaft 61. The driven sprocket 52 is located below the positioning sleeve 2 and is fixedly sleeved on the outside of the rotating shaft 21. The driven sprocket 52 is connected to the drive sprocket 51 through the chain 53.

[0027] The locking rod 4 is arranged laterally inside the lock box 1 and is located on the side opposite to the stepper motor 6. The locking rod 4 slides along its axial direction with the lock box 1. One end of the locking rod 4 is connected to the output end of the stepper motor 6 through a gear and rack mechanism, and the other end of the locking rod 4 is driven by the gear and rack mechanism to extend to the outside of the lock box 1 or retract into the lock box 1.

[0028] Specifically, the gear and rack mechanism includes a gear 71 and a rack 72. The gear 71 is fixedly sleeved on the outside of the transmission shaft 61, and the rack 72 is located on one side of the gear 71 and slides laterally with the inner wall of the lock box 1 through a linear guide assembly. The tooth profile of the rack 72 meshes with the gear 71.

[0029] The linear guide assembly includes a linear guide rail 73 and guide sliders 74. There are two linear guide rails 73, which are arranged parallel to each other, one above the other. Each linear guide rail 73 is provided with two guide sliders 74. Each guide slider 74 is slidably engaged with the linear guide rail 73 it is on. All guide sliders 74 are fixedly connected to the rack 72.

[0030] One end of the locking rod 4 is fixedly connected to the corresponding end of the rack 72 via a connector 75. A through hole 13 corresponding to the end position of the locking rod 4 is provided on the side wall of the lock box 1. A guide sleeve 41 is fixed on the inner side wall of the lock box 1. The through hole 13 communicates with the interior of the guide sleeve 41. The other end of the locking rod 4 passes through the inner side of the guide sleeve 41 and can extend to the outside of the lock box 1 through the through hole 13 located on the side wall of the lock box 1.

[0031] The rotary locks for container trailers are installed at the ends of the front or rear crossbeams of the container trailer. The outer wall of the lock box 1 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 rotary locks for container trailers, and the four containers are located at the four corners of the trailer. The stepper motor 6 of the rotary locks for container trailers is powered by the battery of the tractor unit. In addition, the signal terminal of the stepper motor 6 is connected to the control system located in the tractor unit, and the working state of the stepper motor 6 is controlled by a switch located in the cab.

[0032] In this embodiment, the chain drive mechanism 5 adopts a double linkage structure. The stepper motor 6 drives the lock head 3 to rotate and the lock rod 4 to extend and retract simultaneously through the chain drive mechanism 5 according to the instruction. It is suitable for locking and unlocking containers on the frame in different placement positions or methods, and meets the usage requirements of flatbed trailers and gooseneck trailers at the same time.

[0033] 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 container is placed on top of the front or rear crossbeam, the lock head 3 of the container trailer's turn lock is used to lock the container to the trailer frame. When the container container is placed on the adjacent rear side of the front crossbeam or the adjacent front side of the rear crossbeam, the locking bar 4 of the container trailer's turn lock extends from inside the lock box 1 to lock the container to the trailer frame.

[0034] The parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] 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.

[0037] 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. A double-linkage rotary lock device for a container trailer, characterized in that, It includes a lock box, a positioning sleeve, a lock head, a lock rod, a chain drive mechanism, and a motor. The positioning sleeve is fixedly embedded in the top of the lock box, and the upper end of the positioning sleeve protrudes from the upper surface of the lock box. The lock head is mounted above the positioning sleeve via a rotating shaft and rotates in conjunction with the positioning sleeve. The lower end of the rotating shaft extends out of the bottom of the positioning sleeve. The motor is located inside the lock box on one side, and its output end is connected to the lower end of the rotating shaft via the chain drive mechanism, driving the rotating shaft and the lock head to rotate relative to the positioning sleeve. The locking rod is arranged laterally inside the lock box and is located on the side opposite to the motor. The locking rod slides along its axis with the lock box. One end of the locking lever is connected to the output end of the motor through a gear and rack mechanism, driving the other end of the locking lever to extend to the outside of the lock box or retract into the lock box.

2. The double-linkage rotary lock 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 to form a whole. The motor is a stepper motor. A transmission shaft is vertically installed on one side of the lock box. The transmission shaft is rotatably connected to the lock box through a bearing seat, and its lower end is connected to the output shaft of the stepper motor through a coupling.

3. The double-linkage rotary lock device for a container trailer according to claim 1, characterized in that, The rotating shaft is a straight round shaft that is vertically inserted inside the positioning sleeve. Its upper end extends out of the upper end face of the positioning sleeve and is fixedly connected to the bottom of the lock head as one piece. The lower end of the rotating shaft is rotatably connected to the side wall of the lock box through the second bearing seat.

4. A double-linkage rotary lock device for a container trailer according to claim 2, characterized in that, The chain drive mechanism includes a driving sprocket, a driven sprocket, and a chain. The driving sprocket is fixedly sleeved on the outside of the drive shaft, and the driven sprocket is located below the positioning sleeve and fixedly sleeved on the outside of the rotating shaft. The driven sprocket is connected to the driving sprocket through the chain.

5. A double-linkage rotary lock device for a container trailer according to claim 2, characterized in that, The gear and rack mechanism includes a gear and a spur rack. The gear is fixedly sleeved on the outside of the transmission shaft, and the spur rack is located on one side of the gear and slides laterally with the inner wall of the lock box through a linear guide assembly. The tooth profile of the spur rack meshes with the gear.

6. A double-linkage rotary lock device for a container trailer according to claim 5, characterized in that, One end of the locking rod is fixedly connected to the corresponding end of the straight rack via a connector, and a through hole corresponding to the position of the end of the locking rod is provided on the side wall of the lock box; A guide sleeve is fixed on the inner wall of the lock box, and a through hole communicates with the inside of the guide sleeve. The other end of the lock rod passes through the inner side of the guide sleeve and can extend to the outside of the lock box through the through hole located on the side wall of the lock box.

7. A double-linkage rotary lock device for a container trailer according to claim 5, characterized in that, The linear guide assembly includes linear guide rails and guide blocks. There are two linear guide rails, arranged parallel to each other, one above the other. Each linear guide rail is equipped with two guide blocks, each of which slides in cooperation with the linear guide rail it is on. All guide blocks are fixedly connected to the rack.

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