A low-flatbed semi-trailer with protective features

Abstract

This utility model discloses a low-bed semi-trailer with protective functions, belonging to the technical field of transport vehicles. The semi-trailer includes a semi-trailer rear, a semi-trailer cargo platform, and a semi-trailer connecting platform. Its sides are equipped with a telescopic protective structure controlled by an opening and closing assembly. This structure consists of hollow side panels, nested side panels, and a locking knob, etc., and can be extended and locked laterally. When retracted, it facilitates quick loading and unloading of goods from the side by forklifts. Simultaneously, the semi-trailer also features a flip-down loading platform, which, when unfolded, forms a ramp, facilitating personnel loading and unloading operations. The opening and closing states of the side panels and loading platform can be flexibly controlled through a motor-driven gear and sprocket system. This device effectively solves the problems of traditional semi-trailers having a single loading and unloading method and lacking side panel protection, combining protective and auxiliary loading and unloading functions. It has the advantages of simple operation and high loading and unloading efficiency, significantly improving the convenience of transportation and operation.

Description

Technical Field

[0001] This utility model relates to the field of transport vehicle technology, specifically a low-flatbed semi-trailer with protective functions. Background Technology

[0002] With the rapid development of my country's logistics and transportation industry, the volume of road freight transport has continued to grow, placing higher demands on the efficiency and adaptability of transportation equipment. As an important tool for transporting heavy equipment, construction machinery, and oversized cargo, the functionality and safety of low-bed semi-trailers are particularly crucial. In actual use, it is necessary not only to ensure the stability and safety of goods during transportation but also to consider the convenience and efficiency of loading and unloading operations.

[0003] Currently, most common low-flatbed semi-trailers use fixed side protection structures, which provide some protection but cannot flexibly adapt to different loading and unloading methods. The difficulty in quickly adjusting the structural form according to actual operational needs limits their application effectiveness in diverse logistics scenarios and increases operating time and complexity. Utility Model Content

[0004] The purpose of this utility model is to provide a low-bed semi-trailer with protective functions to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-bed semi-trailer with protective function, comprising a semi-trailer rear, a semi-trailer cargo platform, and a semi-trailer connecting plate. The cargo platform is welded to the side of the semi-trailer rear. Two retractable plate fixing blocks are welded to one side of the cargo platform. A retractable plate mounting post is connected between the two retractable plate fixing blocks via a bearing. A retractable plate mounting tube is nested to the outside of the side wall of the retractable plate mounting post via a bearing. Two first knobs are threaded to the side wall of the retractable plate mounting tube, and the two first knobs pass through the retractable plate mounting tube and abut against the retractable plate mounting post. Next, a hollow side plate is welded to the side wall of the shrink plate mounting tube. Two limiting slots are opened on both sides of the hollow side plate. A nested side plate is slidably connected inside the hollow side plate. A rotating column is connected through the side of the nested side plate by a bearing. Two hooks are connected to the two ends of the rotating column through the two limiting slots. A hook post is welded between the two hooks. A second knob is threaded to the side wall of one of the hooks. The second knob passes through the hook and abuts against the hollow side plate. A driven gear is welded to the shrink plate mounting post through a shrink plate fixing block. An opening and closing assembly is installed on the semi-trailer cargo board.

[0006] Preferably, the opening and closing assembly includes a gear mounting block welded to the semi-trailer cargo plate, a motor bolted to the semi-trailer cargo plate, a gear mounting shaft connected to one end of the motor output shaft via a coupling, and the other end of the gear mounting shaft mounted on the side wall of the gear mounting block via a bearing. A drive gear and a first sprocket are welded to the side wall of the gear mounting shaft. Two sprocket mounting blocks are welded to the upper surface of the semi-trailer cargo plate, and a sprocket mounting post is connected between the sprocket mounting blocks via a bearing. A ratchet is welded to one side of the sprocket mounting block via a shaft, and a pawl is connected to the side wall of one side of the sprocket mounting block via a rotating shaft. A third sprocket and a second sprocket are welded to the side wall of the sprocket mounting post, so that the retractable board assembly and the loading board are retracted and lowered synchronously.

[0007] Preferably, two loading platform mounting blocks are welded to the side of the semi-trailer loading platform, and a loading platform mounting column is connected between the two loading platform mounting blocks by a bearing. A fourth sprocket is welded to the loading platform mounting column through one of the loading platform mounting blocks, and a loading platform is welded to the side wall of the loading platform mounting column, so that workers can board the vehicle through the loading platform.

[0008] Preferably, the driven gear meshes with the driving gear, the first sprocket and the second sprocket are connected by a chain drive, the third sprocket and the fourth sprocket are connected by a chain drive, and the ratchet and the pawl engage with each other.

[0009] Preferably, the upper surface of the hollow side plate is provided with a hook groove, and the hook post is engaged in the hook groove.

[0010] Preferably, a semi-trailer connecting plate is welded to the side of the semi-trailer cargo platform, two cargo fixing blocks are welded to the upper surface of the semi-trailer cargo platform, and a semi-trailer connecting column and two semi-trailer support columns are bolted to the lower surface of the semi-trailer connecting plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: Flexible and efficient loading and unloading: By setting up a retractable and lockable structure, it can provide ample side operation space when retracted, which is convenient for forklifts to carry out rapid mechanized loading and unloading operations. When the loading platform is unfolded, it forms a ramp, which can help personnel to safely and conveniently board the vehicle and carry out manual handling. It realizes the flexible switching between manual operation and mechanical loading and unloading modes, significantly improving the adaptability of loading and unloading and overall efficiency.

[0012] Easy and labor-saving operation: The opening and closing components are driven by a motor and transmitted through a gear and sprocket system. The opening and closing of the side panels and boarding platform can be controlled remotely or easily, which significantly reduces the labor intensity of operators, simplifies the operation process, and improves the convenience of operation.

[0013] Sturdy structure and reliable protection: The telescopic side plate adopts a nested structure and multiple knob locking design, which can effectively expand the protective area and maintain structural stability during transportation. The ratchet and pawl mechanism in the opening and closing assembly can reliably lock the position of the sprocket and side plate, effectively preventing the mechanism from accidentally rotating or loosening due to vibration or external impact during transportation or operation, ensuring the safety and reliability of the equipment. The overall structure has good impact and vibration resistance, ensuring the safety of driving and operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a side view of the present invention. Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of some of the components of this utility model.

[0015] In the diagram: 1. Semi-trailer tail; 2. Semi-trailer connecting column; 3. Semi-trailer cargo platform; 4. Cargo fixing block; 5. Semi-trailer connecting plate; 6. Semi-trailer support column; 7. Hollow side plate; 8. Nested side plate; 9. Shrink plate fixing block; 10. Shrink plate mounting column; 11. Shrink plate mounting tube; 12. First knob; 13. Rotating column; 14. Hook; 15. Hook column; 16. Sprocket mounting block; 17. Pawl; 18. Ratchet; 19. Third sprocket; 20. Fourth sprocket; 21. Boarding plate mounting column; 22. Boarding plate; 23. Boarding plate mounting block; 24. Sprocket mounting column; 25. Second sprocket; 26. Gear mounting block; 27. Drive gear; 28. First sprocket; 29. ​​Gear mounting shaft; 30. Second knob; 31. Driven gear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", 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.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Please see Figure 1-5 This utility model provides a technical solution: a low-bed semi-trailer with protective function, including a semi-trailer rear 1, a semi-trailer cargo platform 3, and a semi-trailer connecting plate 5. The semi-trailer cargo platform 3 is welded to the side of the semi-trailer rear 1. Two shrink plate fixing blocks 9 are welded to one side of the semi-trailer cargo platform 3. A shrink plate mounting column 10 is connected between the two shrink plate fixing blocks 9 through a bearing. A shrink plate mounting tube 11 is nested to the outside of the side wall of the shrink plate mounting column 10 through a bearing. Two first knobs 12 are threaded to the side wall of the shrink plate mounting tube 11. The two first knobs 12 pass through the shrink plate mounting tube 11 and abut against the shrink plate mounting column 10. A hollow side plate 7 is welded to the side wall of the retractable plate mounting tube 11. Two limiting slots are opened on both sides of the hollow side plate 7. A nested side plate 8 is slidably connected inside the hollow side plate 7. A rotating column 13 is connected through the side of the nested side plate 8 via a bearing. Two hooks 14 are connected through the two limiting slots at both ends of the rotating column 13. A hook column 15 is welded between the two hooks 14. A second knob 30 is threaded to the side wall of one hook 14. The second knob 30 passes through the hook 14 and abuts against the hollow side plate 7. A driven gear 31 is welded through a retractable plate fixing block 9. An opening and closing assembly is installed on the semi-trailer cargo platform 3.

[0020] Furthermore, the opening and closing assembly includes a gear mounting block 26 welded to the semi-trailer cargo platform 3, a motor bolted to the semi-trailer cargo platform 3, a gear mounting shaft 29 connected to one end of the motor output shaft via a coupling, and the other end of the gear mounting shaft 29 mounted on the side wall of the gear mounting block 26 via a bearing. A drive gear 27 and a first sprocket 28 are welded to the side wall of the gear mounting shaft 29. Two sprocket mounting blocks 16 are welded to the upper surface of the semi-trailer cargo platform 3, and a sprocket mounting post 24 is connected between the sprocket mounting blocks 16 via a bearing. A ratchet 18 is welded to the sprocket mounting post 24 through one side of the sprocket mounting block 16, and a pawl 17 is connected to the side wall of one side of the sprocket mounting block 16 via a rotating shaft. A third sprocket 19 and a second sprocket 25 are welded to the side wall of the sprocket mounting post 24, so that the retractable plate assembly and the loading platform 22 are retracted and lowered synchronously.

[0021] Furthermore, two loading platform mounting blocks 23 are welded to the side of the semi-trailer loading platform 3. The two loading platform mounting blocks 23 are connected by a loading platform mounting column 21 through a bearing. A fourth sprocket 20 is welded to the loading platform mounting block 23 on one side through the loading platform mounting column 21. A loading platform 22 is welded to the side wall of the loading platform mounting column 21, so that workers can board the semi-trailer through the loading platform 22.

[0022] Furthermore, the driven gear 31 meshes with the driving gear 27, the first sprocket 28 and the second sprocket 25 are connected by chain drive, the third sprocket 19 and the fourth sprocket 20 are connected by chain drive, and the ratchet 18 and the pawl 17 engage with each other.

[0023] Furthermore, a hook groove is provided on the upper surface of the hollow side plate 7, and the hook post 15 is engaged in the hook groove.

[0024] Furthermore, a semi-trailer connecting plate 5 is welded to the side of the semi-trailer cargo platform 3, two cargo fixing blocks 4 are welded to the upper surface of the semi-trailer cargo platform 3, and a semi-trailer connecting column 2 and two semi-trailer support columns 6 are bolted to the lower surface of the semi-trailer connecting plate 5.

[0025] Working principle: Synchronous linkage and mode switching: The core operation of the semi-trailer is driven by a motor mounted on the semi-trailer loading platform 3. After the motor starts, power is output through the gear mounting shaft 29, driving the drive gear 27 on it to rotate. The drive gear 27 meshes with the driven gear 31 welded to the retractable platform mounting column 10, transmitting power to the side panel assembly. At the same time, the first sprocket 28 on the gear mounting shaft 29 drives the second sprocket 25 through a chain, which in turn drives the sprocket mounting column 24 and its third sprocket 19 to rotate. The third sprocket 19 finally drives the fourth sprocket 20 through a chain, thereby controlling the rotation of the loading platform mounting column 21. The rotation direction of the drive retractable platform mounting column 10 is opposite to that of the loading platform mounting column 21. Therefore, when the motor rotates in one direction, the telescopic plate assembly and the loading platform 22 will be lowered simultaneously, providing convenience for manual loading and unloading. When the motor rotates in the opposite direction, the telescopic plate assembly and the loading platform 22 will be retracted simultaneously, forming a protective mode. When the telescopic plate assembly and the loading platform 22 are retracted, the pawl 17 is moved to engage with the ratchet 18, which can reliably lock the position of the sprocket and the side plate.

[0026] Manual adjustment and securing of the telescopic plate assembly: In the initial state, the telescopic plate assembly is in the extended protective position. When forklift operation is required, the operator first loosens the first knob 12, allowing the telescopic plate mounting tube 11 to rotate freely on the telescopic plate mounting post 10, thereby causing the hollow side plate 7 to rotate and retract towards the vehicle body. Next, loosen the second knob 30 to release the lock on the nested side plate 8, allowing it to be pushed into the hollow side plate 7 to further reduce the space occupied. Finally, the hook 14 and hook post 15 can be attached to the telescopic plate mounting post 10 to achieve final mechanical fixation, ensuring that the structure does not obstruct work during forklift operation.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low flat semi-trailer with a protection function, comprising a semi-trailer tail (1), a semi-trailer cargo plate (3) and a semi-trailer connecting plate (5), characterized in that: A semi-trailer cargo platform (3) is welded to the side of the rear (1) of the semi-trailer. A telescopic plate assembly is installed on one side of the semi-trailer cargo platform (3), and an opening and closing assembly is installed on the semi-trailer cargo platform (3). The telescopic platform assembly includes a semi-trailer cargo platform (3) with two retractable platform fixing blocks (9) welded to its side. A retractable platform mounting column (10) is connected between the two retractable platform fixing blocks (9) via a bearing. A retractable platform mounting tube (11) is nested to the outside of the side wall of the retractable platform mounting column (10) via a bearing. Two first knobs (12) are threaded to the side wall of the retractable platform mounting tube (11). The two first knobs (12) pass through the retractable platform mounting tube (11) and abut against the retractable platform mounting column (10). A hollow side plate (7) is welded to the side wall of the retractable platform mounting tube (11). The hollow side plate (7) has two sides... Two limiting slots are provided. A nested side plate (8) is slidably connected inside the hollow side plate (7). A rotating column (13) is connected through the side of the nested side plate (8) via a bearing. Two hooks (14) are connected through the two limiting slots at both ends of the rotating column (13). A hook column (15) is welded between the two hooks (14). A second knob (30) is threadedly connected to the side wall of one of the hooks (14). The second knob (30) passes through the hook (14) and abuts against the hollow side plate (7). A driven gear (31) is welded through a shrink plate fixing block (9).

2. The low flat semi-trailer with a protection function according to claim 1, characterized in that: The opening and closing assembly includes a gear mounting block (26) welded to a semi-trailer cargo platform (3), a motor connected to the semi-trailer cargo platform (3) by bolts, the output shaft of the motor being connected to one end of a gear mounting shaft (29) via a coupling, the other end of the gear mounting shaft (29) being mounted on the side wall of the gear mounting block (26) via a bearing, a drive gear (27) and a first sprocket (28) being welded to the side wall of the gear mounting shaft (29), two sprocket mounting blocks (16) being welded to the upper surface of the semi-trailer cargo platform (3), a sprocket mounting column (24) being connected between the sprocket mounting blocks (16) via a bearing, a ratchet (18) being welded to the sprocket mounting column (24) through one side of the sprocket mounting block (16), a pawl (17) being connected to the side wall of one side of the sprocket mounting block (16) via a rotating shaft, and a third sprocket (19) and a second sprocket (25) being welded to the side wall of the sprocket mounting column (24).

3. The low flatbed semitrailer with a protection function according to claim 2, characterized in that: The semi-trailer cargo platform (3) has two loading platform mounting blocks (23) welded to its side. The two loading platform mounting blocks (23) are connected by a loading platform mounting column (21) through a bearing. The loading platform mounting column (21) passes through one of the loading platform mounting blocks (23) and is welded to a fourth sprocket (20). The loading platform (22) is welded to the side wall of the loading platform mounting column (21).

4. The low flatbed semitrailer with a protection function according to claim 3, characterized in that: The driven gear (31) meshes with the driving gear (27), the first sprocket (28) and the second sprocket (25) are connected by chain drive, the third sprocket (19) and the fourth sprocket (20) are connected by chain drive, and the ratchet (18) and the pawl (17) engage with each other.

5. The low flatbed semitrailer with a protection function according to claim 1, characterized in that: The hollow side plate (7) has a hook groove on its upper surface, and the hook post (15) is engaged in the hook groove.

6. The low flat bed semi-trailer with protection function according to claim 1, characterized in that: The semi-trailer cargo platform (3) is welded to the side with a semi-trailer connecting plate (5), and two cargo fixing blocks (4) are welded to the upper surface of the semi-trailer cargo platform (3). The lower surface of the semi-trailer connecting plate (5) is bolted to a semi-trailer connecting column (2) and two semi-trailer support columns (6).

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