Low flatbed semitrailer with protective structure

Abstract

The utility model relates to the technical field of low flatbed semitrailers, and discloses a low flatbed semitrailer with a protective structure, which comprises a frame, a plurality of first guardrails are rotatably connected to both sides of the frame, the plurality of first guardrails are arranged in pairs, four rotating shafts are fixedly connected to the surface of one side, far away from the frame, of each group of first guardrails, the four rotating shafts are arranged in pairs, the surfaces of the two groups of rotating shafts are sleeved with second guardrails, one side of one first guardrail is provided with a rotating mechanism used for rotating the first guardrail, the ends of the sides, away from the frame, of the multiple first guardrails are provided with first storage grooves, and the interiors of the multiple first storage grooves are slidably connected with extension arms; and lifting mechanisms for lifting the extension arms are arranged in the multiple first storage grooves. Through the arrangement of the first guardrail and the second guardrail, the guardrail can be prevented from being disassembled and assembled during use.

Description

Technical Field

[0001] This utility model relates to the field of low-bed semi-trailer technology, and in particular to a low-bed semi-trailer with a protective structure. Background Technology

[0002] Low-bed semi-trailers with protective structures are vehicles that add protective features to traditional low-bed semi-trailers. They are primarily used to improve transportation safety and protect cargo. These semi-trailers are typically equipped with side panels, rear tailgates, guardrails, and other protective features to effectively prevent cargo from falling or sliding during transport, protecting the safety of the driver and other road users. The protective structure not only improves cargo safety but also enhances the overall stability of the vehicle, reducing driving risks caused by cargo movement. These vehicles usually need to meet certain safety standards and regulations to ensure safety and reliability during transportation. Low-bed semi-trailers with protective structures provide additional safety when transporting heavy cargo and are widely used in industries such as construction, engineering, and logistics.

[0003] Some existing low-flatbed semi-trailers with protective structures are in use, and their guardrails are usually modular, which means that they need to be disassembled and reassembled during use. However, the disassembly process may damage the guardrails themselves, and long-term disassembly and installation may also cause wear and tear on the parts, thus affecting the service life of the guardrails. Therefore, this problem needs to be solved. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a low-flatbed semi-trailer with a protective structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-bed semi-trailer with a protective structure includes a frame. Multiple first guardrails are rotatably connected to both sides of the frame, and these guardrails are arranged in pairs. Each pair of first guardrails has four rotating shafts fixedly connected to its surface away from the frame. These four rotating shafts are also arranged in pairs. A second guardrail is fitted onto the surface of each pair of rotating shafts. One of the first guardrails has a rotating mechanism for rotating it. The ends of the multiple first guardrails away from the frame have first storage slots. Extension arms are slidably connected inside each of the multiple first storage slots. A lifting mechanism for raising and lowering the extension arms is also provided inside each of the multiple first storage slots. The arrangement of the first and second guardrails avoids the need for disassembly and assembly of the guardrails during use.

[0007] As a further embodiment of this utility model, the rotating mechanism includes a first connecting member, which is fixedly connected to one side of the first guardrail. A first hydraulic rod is rotatably connected to the surface of the first connecting member away from the first guardrail. The first hydraulic rod is rotatably connected to one side of the vehicle frame. By setting the first hydraulic rod, the guardrail can be rotated.

[0008] As a further embodiment of this utility model, the lifting mechanism includes a second storage slot, which is opened inside the extension arm. A second hydraulic rod is provided inside the second storage slot. One end of the second hydraulic rod is fixedly connected to the inner surface of the first storage slot, and the other end of the second hydraulic rod is fixedly connected to one side inside the second storage slot. The ends of the multiple extension arms away from the first guardrail are all hinged with second connecting members. The tops of the multiple second connecting members are all fixedly connected with top plates. Sliding grooves are opened on the symmetrical sides of the two first guardrails. The same rear guardrail is slidably connected inside the two sliding grooves. Two support arms are symmetrically fixedly connected to the bottom of the frame away from the rear guardrail. Multiple tires are rotatably connected to the surface of the frame near the rear guardrail. The multiple tires are arranged in groups of three. The extension arms can be raised and lowered by the second hydraulic rod.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. This utility model employs a hydraulic rod to drive the guardrail to rotate, thus avoiding the need for disassembly and assembly during use. This effectively solves the problem that disassembly may damage the guardrail itself, and prolonged disassembly and installation may lead to wear and tear on parts, affecting the service life of the guardrail. First guardrails are installed on both sides of the vehicle frame, and extension arms are installed inside multiple first guardrails. The tops of these extension arms are connected to the same top plate. Because the first hydraulic rod is connected to one of the first guardrails, its activation drives that guardrail to rotate. Since the multiple first guardrails are connected by the top plate, when one guardrail rotates, the others also rotate, achieving the purpose of protection. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a low-flatbed semi-trailer with a protective structure proposed in this utility model.

[0012] Figure 2 This is a side view schematic diagram of a low-flatbed semi-trailer with a protective structure proposed in this utility model.

[0013] Figure 3 for Figure 2 Enlarged structural diagram at point A in the diagram;

[0014] Figure 4 for Figure 2 Enlarged structural diagram at point B in the diagram;

[0015] Figure 5 This is a schematic diagram of the rotating mechanism of a low-flatbed semi-trailer with a protective structure proposed in this utility model.

[0016] Figure 6 for Figure 5 A magnified structural diagram at point C in the diagram.

[0017] In the diagram: 1. Frame; 2. First guardrail; 3. Roof plate; 4. Rear bumper; 101. Tire; 102. Support arm; 201. First connector; 202. First hydraulic rod; 203. Shaft; 204. Second guardrail; 205. Slide groove; 206. First storage slot; 301. Extension arm; 302. Second connector; 303. Second storage slot; 304. Second hydraulic rod. Detailed Implementation

[0018] 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 some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1 - Figure 6 A low-bed semi-trailer with a protective structure includes a frame 1. Multiple first guardrails 2 are rotatably connected to both sides of the frame 1, and the multiple first guardrails 2 are arranged in pairs. Each pair of first guardrails 2 has four rotating shafts 203 fixedly connected to the surface of the side away from the frame 1. The four rotating shafts 203 are arranged in pairs. A second guardrail 204 is sleeved on the surface of each pair of rotating shafts 203. One side of one of the first guardrails 2 is provided with a rotating mechanism for rotating the first guardrail 2. The ends of the multiple first guardrails 2 away from the frame 1 are provided with first storage slots 206. Extension arms 301 are slidably connected inside the multiple first storage slots 206. Lifting mechanisms for raising and lowering the extension arms 301 are provided inside the multiple first storage slots 206. The arrangement of the first guardrails 2 and second guardrails 204 can avoid the need for disassembly and assembly of the guardrails during use.

[0020] Preferably, the rotating mechanism includes a first connecting member 201, which is fixedly connected to one side of the first guardrail 2. A first hydraulic rod 202 is rotatably connected to the surface of the first connecting member 201 away from the first guardrail 2. The first hydraulic rod 202 is rotatably connected to one side of the vehicle frame 1. The guardrail can be rotated by the first hydraulic rod 202.

[0021] Preferably, the lifting mechanism includes a second storage slot 303, which is formed inside the extension arm 301. A second hydraulic rod 304 is disposed inside the second storage slot 303. One end of the second hydraulic rod 304 is fixedly connected to the inner surface of the first storage slot 206, and the other end of the second hydraulic rod 304 is fixedly connected to one side inside the second storage slot 303. Second connecting members 302 are hinged to the ends of the multiple extension arms 301 on the side away from the first guardrail 2, and tops of the multiple second connecting members 302 are fixedly connected to a top. Plate 3, on which the two first guardrails 2 are symmetrically provided with sliding grooves 205, the same rear guardrail 4 is slidably connected inside the two sliding grooves 205. The rear guardrail 4 can be quickly installed by setting the sliding grooves 205. Two support arms 102 are symmetrically fixedly connected to the bottom of the side of the frame 1 away from the rear guardrail 4. Multiple tires 101 are rotatably connected to the surface of the frame 1 near the rear guardrail 4. The multiple tires 101 are arranged in groups of three. The extension arm 301 can be raised and lowered by setting the second hydraulic rod 304.

[0022] Working principle: When the guardrail needs to be raised, the first hydraulic rods 202 on both sides of the frame 1 are activated. First guardrails 2 are installed on both sides of the frame 1, and second guardrails 204 are installed between multiple first guardrails 2. Extension arms 301 are installed inside each of the multiple first guardrails 2, and the top of the multiple extension arms 301 is equipped with the same top plate 3. Because the first hydraulic rods 202 are connected to one of the first guardrails 2, when the first hydraulic rods 202 are activated, they can drive one of the first guardrails 2 to rotate. The multiple first guardrails 2 are connected through the top plate 3, so when one of the first guardrails 2 is raised... When guardrail 2 rotates, the remaining first guardrails 2 will also rotate to achieve the purpose of protection. A second hydraulic rod 304 is installed inside each of the first guardrails 2, and the second hydraulic rod 304 is connected to the extension arm 301. The height of the extension arm 301 and the top plate 3 can be adjusted through the second hydraulic rod 304 to ensure that it can adapt to more types of materials. A sliding groove 205 is opened on one side of the two tail first guardrails 2, and a rear stop 4 is installed between the two sliding grooves 205. Since the rear stop 4 is installed in a sliding manner, it can be determined whether to use the rear stop 4 according to the site conditions.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low flatbed semitrailer with a protective structure, comprising a frame (1), characterized in that, Both sides of the frame (1) are rotatably connected with a plurality of first guardrails (2), and the plurality of first guardrails (2) are arranged in pairs, and the surfaces of the first guardrails (2) away from the frame (1) are fixedly connected with four rotating shafts (203), and the four rotating shafts (203) are arranged in pairs, and the surfaces of the two groups of rotating shafts (203) are sleeved with second guardrails (204), one side of one of the first guardrails (2) is provided with a rotating mechanism for rotating the first guardrail (2), a plurality of first storage grooves (206) are formed in the ends of the first guardrails (2) away from the frame (1), a plurality of extension arms (301) are slidably connected in the plurality of first storage grooves (206), and a lifting mechanism for lifting the extension arm (301) is arranged in the plurality of first storage grooves (206).

2. The low flatbed semitrailer with a protective structure according to claim 1, characterized in that, The rotating mechanism comprises a first connecting piece (201), the first connecting piece (201) is fixedly connected to one side of the first guardrail (2), and the surface of the first connecting piece (201) away from the first guardrail (2) is rotatably connected with a first hydraulic rod (202), and the first hydraulic rod (202) is rotatably connected to one side of the frame (1).

3. The low flatbed semitrailer with a protective structure according to claim 2, characterized in that, The lifting mechanism comprises a second storage groove (303), the second storage groove (303) is formed in the extension arm (301), and the second storage groove (303) is provided with a second hydraulic rod (304).

4. The low flatbed semitrailer with a protective structure according to claim 3, characterized in that, One end of the second hydraulic rod (304) is fixedly connected to the inner surface of the first storage groove (206), and the other end of the second hydraulic rod (304) is fixedly connected to one side of the second storage groove (303).

5. The low flatbed semitrailer with a protective structure according to claim 4, characterized in that, The ends of the plurality of extension arms (301) away from the first guardrail (2) are hingedly connected with a second connecting piece (302), the top of the second connecting piece (302) is fixedly connected with a top plate (3), and the two first guardrails (2) are symmetrically provided with a sliding groove (205).

6. The low flatbed semitrailer with a protective structure according to claim 5, characterized in that The same backstop (4) is slidably connected in the two sliding grooves (205), the bottom of the frame (1) away from the backstop (4) is fixedly connected with two support arms (102), the surface of the frame (1) close to the backstop (4) is rotatably connected with a plurality of tires (101), and the plurality of tires (101) are arranged in groups of three.

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