High-low board semitrailer can lie before compartment structure

Abstract

A flatbed semi-trailer front cargo box structure includes a front cargo box body. The front cargo box body is mounted on the front side of the frame via several tilting support components and can be switched between an upright position and a forward-tilted horizontal position. The tilting support components include a front cargo box connector, a frame connector, a first pin, and a second pin. The front cargo box connector is fixedly mounted on the front cargo box body, and the frame connector is fixedly mounted on the front side of the frame. The front cargo box connector is hinged to the frame connector via the first pin. When the front cargo box body is upright or horizontal, the front cargo box connector is locked and positioned on the frame connector via the second pin. This utility model's front cargo box structure can quickly switch between an upright position and a forward-tilted horizontal position. It has a simple structure, is convenient and quick to operate, and ensures that the front cargo box structure is locked and positioned in both states, guaranteeing structural stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer technology, specifically to a structure for a high-low plank semi-trailer with a front box that can be laid flat. Background Technology

[0002] Currently, low-bed semi-trailers are mainly used to transport large, non-detachable goods. During transportation, the goods may move forward due to inertia as the train brakes, causing damage to the cab at the front of the semi-trailer and endangering the driver's safety. When the low-bed semi-trailer needs to load goods in front of the frame, the upright front box will affect the loading of the goods. At the same time, due to the uncertainty of the transported goods, a fixed front box will limit the types and sizes of goods and have poor loading flexibility. Therefore, it is necessary to design a low-bed semi-trailer with a flat front box structure, which can improve the flexibility and loading space of the low-bed semi-trailer for loading goods, while also protecting the cab when the goods are prone to displacement.

[0003] Chinese utility model patent CN202320621625.4 discloses a flatbed truck body, comprising a truck body mainly composed of a floor, a front panel, side panels, and a rear panel. The front panel is connected to the floor via a hinge and can be flipped outward around the hinge. A telescopic support frame and a limiting component are provided on the front end of the floor. The support frame supports the front panel, and the limiting component restricts the outward flipping of the front panel. When the front panel flips, the pin on the insert box and the telescopic support frame are pulled out, and the front panel flips around the hinge, so that the front panel is in a horizontal state on the telescopic support frame. This design not only increases the length of the truck body but also enables quick disassembly, improving loading quality and efficiency. The manufacturing process is simple, and it can be widely used in the front panel structure assembly of flatbed trucks, flatbed trailers, and semi-trailers. However, the telescopic support frame in the aforementioned patent is slidably connected to the front crossbeam of the cargo box floor. Although strong magnets are provided to magnetically attract the telescopic support frame to the cargo box floor, the strong magnets on the limiting plates at the ends of the support rods are relatively small compared to the size of the support rods. The resulting magnetic attraction is not reliable and cannot guarantee that the telescopic support frame will not retract due to bumps and vibrations during vehicle transportation. Consequently, it cannot effectively support the front panel of the cargo box after it has been flipped, causing the front panel to be unstable and even tilt downwards after flipping. This fails to achieve the purpose of increasing the length of the cargo box and also poses a safety hazard. At the same time, the front panel of the cargo box directly presses on the telescopic support frame after flipping, and there is no locking between the front panel and the telescopic support frame. The front panel of the cargo box lacks fixation and is in a free-flipping state. During vehicle transportation, the front panel of the cargo box will vibrate violently up and down due to bumps and vehicle vibrations, which will continuously impact the telescopic support frame. This will subject the telescopic support frame to intermittent strong pressure, causing it to bend or break, resulting in poor reliability. Moreover, the overall structural design of the aforementioned patent is relatively complex, and the flipping operation is cumbersome and inefficient. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a flat-lying front cargo box structure for high-low bed semi-trailers. This front cargo box structure can quickly switch between an upright state and a forward-tilted horizontal state. It has a simple structure, is easy and quick to operate, and locks the front cargo box structure in both states, ensuring structural stability and reliability. This provides limiting protection for cargo that may slide or shift when transporting large, non-detachable goods in high-low bed semi-trailers, improving cargo transportation safety. At the same time, when there is no need for protection of transported goods, it can expand the transportation space and improve the flexibility of loading cargo.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a high-low board semi-trailer with a flat-lying front box structure, including a front box body, which is installed on the front side of the frame through several flip support components and can be transformed between an upright state and a forward flipped-forward horizontal state. The tilting support assembly includes a front box connector, a frame connector, a first pin, and a second pin. The front box connector is fixedly installed on the front box body, and the frame connector is fixedly installed on the front side of the frame. The front box connector is hinged to the frame connector by the first pin. When the front box body is upright or horizontal, the front box connector is locked and positioned on the frame connector by the second pin.

[0006] Beneficial effects: The front box body is installed on the front side of the frame via the front box connector and the frame connector of the flip support assembly. The front box connector and the frame connector are hinged by the first pin, which allows the front box body to flip around the first pin with the front box connector. When the front box body is upright or flat, the second pin can lock the front box body and the front box connector on the frame connector for positioning. This allows the front box body to quickly change between the upright state and the forward flip to the horizontal state. The structure is simple, the operation is convenient and quick, and the front box structure can be locked and positioned in both states, ensuring structural stability and reliability.

[0007] Therefore, when transporting large, non-detachable cargo in a low-bed semi-trailer, raising the front cargo box allows it to limit and protect the cargo from potential sliding displacement, preventing damage to the cab and improving transport safety. When no protection is required, lowering the front cargo box expands transport space, improves economic efficiency, facilitates loading, and increases loading flexibility.

[0008] Based on the above, both ends of the first pin and the second pin are provided with round holes, and cotter pins can be detachably installed in the round holes.

[0009] Beneficial effect: The cotter pin can limit the first and second pins, preventing them from falling off during use.

[0010] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages: (1) It can improve the loading efficiency of cargo: by flattening the front box and reducing the front protrusion of the high and low bed semi-trailer, cargo can be loaded through the front, which can effectively improve the loading efficiency of loading cargo from the semi-trailer. (2) It can effectively improve space utilization: When the front box does not need to be limited when transporting goods, the flat front box can realize the integration of the front box and the semi-trailer platform, increase the cargo loading space, and improve the economic benefits of transportation. (3) It can effectively improve the safety of loaded goods: Through the flip support component, the front compartment can be flipped quickly, so that the front compartment can be erected and the goods that may be displaced can be limited, thereby improving the safety of goods transportation. (4) The flip support component can lock the front box structure in both upright and flat states, ensuring the structural strength and load-bearing capacity of the front box structure and meeting the requirements of high and low flatbed semi-trailers for highway transportation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a structural schematic diagram of the flip support component of this utility model.

[0013] Figure 3 This is a structural diagram of the front compartment body of this utility model in the upright state.

[0014] Figure 4 This is a schematic diagram of the structure of the front compartment of this utility model when it is flipped forward to a horizontal state.

[0015] In the diagram: 1. Front compartment body; 2. Frame; 3. Front compartment connector; 4. Frame connector; 5. First pin; 6. Second pin; 7. First hinge pin hole; 8. First positioning pin hole; 9. Second hinge pin hole; 10. Second positioning pin hole; 11. Third positioning pin hole; 12. Round hole. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0017] like Figures 1-4As shown, a high-low bed semi-trailer with a flat-lying front box structure includes a front box body 1. The front box body 1 is installed on the front side of the frame 2 through several flip support components and can be changed between an upright state and a forward flipped-forward horizontal state. The tilting support assembly includes a front box connector 3, a frame connector 4, a first pin 5, and a second pin 6. The front box connector 3 is fixedly installed on the front box body 1, and the frame connector 4 is fixedly installed on the front side of the frame 2. The front box connector 3 is provided with a first hinge pin hole 7 and a first positioning pin hole 8, and the frame connector 4 is provided with a second hinge pin hole 9, a second positioning pin hole 10, and a third positioning pin hole 11. The first hinge pin hole 7 and the second hinge pin hole 9 are hinged by the first pin 5 so that the front body 1 can rotate around the first pin 5 along with the front connecting piece 3. When the first positioning pin hole 8 and the second positioning pin hole 10 are aligned and connected by the second pin 6, the front box body 1 is erected and locked on the frame connector 4 along with the front box connector 3. When the first positioning pin hole 8 and the third positioning pin hole 11 are aligned and connected by the second pin 6, the front box body 1 flips forward to a horizontal position and locks itself in place on the frame connector 4 along with the front box connector 3.

[0018] Furthermore, both ends of the first pin 5 and the second pin 6 are provided with round holes 12, and cotter pins can be detachably installed in the round holes 12.

[0019] Specifically, such as Figure 2 As shown, the front box connector 3 is a channel steel with a vertical setting and an opening on the front side. The front box connector 3 is welded to the front side of the front box body 1. A first hinge pin hole 7 and a first positioning pin hole 8 are provided on the lower part of the left and right side plates of the front box connector 3. The first positioning pin hole 8 is located on the front side of the first hinge pin hole 7. The frame connector 4 is a double-ear hinge support with a front opening. The frame connector 4 is welded to the front side of the front beam of the frame 2. The left and right ear plates of the frame connector 4 are provided with a second hinge pin hole 9, a second positioning pin hole 10 and a third positioning pin hole 11. The second positioning pin hole 10 is located in front of the second hinge pin hole 9 and the third positioning pin hole 11 is located below the second hinge pin hole 9. The distances between the first hinge pin hole 7 and the first positioning pin hole 8, the distances between the second hinge pin hole 9 and the second positioning pin hole 10, and the distances between the second hinge pin hole 9 and the third positioning pin hole 11 are all the same. The lower part of the front box connector 3 is placed between the two ear plates of the frame connector 4, and the first hinge pin hole 7 and the second hinge pin hole 9 are directly opposite each other. The first pin 5 passes through and connects the first hinge pin hole 7 and the second hinge pin hole 9. When the front compartment body 1 is erected along with the front compartment connector 3, the first positioning pin hole 8 and the second positioning pin hole 10 are aligned left and right. Inserting the second pin 6 into the first positioning pin hole 8 and the second positioning pin hole 10 can lock and position the front compartment connector 3. When the front compartment body 1 flips forward to a horizontal position along with the front compartment connector 3, the first positioning pin hole 8 rotates downward to correspond to the third positioning pin hole 11 on the left and right. The second pin 6 is then inserted into the first positioning pin hole 8 and the third positioning pin hole 11 to lock and position the front compartment connector 3. Furthermore, the lower end of the front compartment connector 3 rotates to the rear end and abuts against the frame connector 4, which further enhances the structural strength and load-bearing capacity.

[0020] This invention enables the front compartment body 1 to quickly change between an upright state and a forward-flipped horizontal state. It has a simple structure, is easy and quick to operate, and locks the front compartment structure in both states, ensuring structural stability and reliability.

[0021] Therefore, when transporting large, non-detachable cargo in a low-bed semi-trailer, raising the front cargo box 1 can limit and protect the cargo from potential sliding displacement, preventing damage to the cab and improving cargo transportation safety. When no protection is required when transporting cargo in a low-bed semi-trailer, lowering the front cargo box 1 expands the transportation space, improves transportation efficiency, facilitates cargo loading, and increases loading flexibility.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A flatbed semi-trailer front cargo box structure, comprising a front cargo box body, characterized in that: The front compartment body is mounted on the front side of the frame via several tilting support components and can be transformed between an upright position and a forward tilting to a horizontal position; The tilting support assembly includes a front box connector, a frame connector, a first pin, and a second pin. The front box connector is fixedly installed on the front box body, and the frame connector is fixedly installed on the front side of the frame. The front box connector is hinged to the frame connector by the first pin. When the front box body is upright or horizontal, the front box connector is locked and positioned on the frame connector by the second pin.

2. The high / low bed semi-trailer with a flat-lying front cargo box structure according to claim 1, characterized in that: Both ends of the first and second pins have round holes, in which cotter pins can be detachably installed.

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