Vehicle body reinforcing structure and vehicle

Abstract

The utility model provides a vehicle body reinforcing structure and a vehicle, and belongs to the technical field of vehicle bodies, and the vehicle body reinforcing structure comprises a middle floor connecting plate arranged below a middle floor of the vehicle body and a safety belt reinforcing plate arranged at the rear end of the middle floor connecting plate. The middle floor connecting plate extends in the front-back direction of the whole vehicle, the front end of the middle floor connecting plate is connected with the rear floor front cross beam, the rear end of the middle floor connecting plate is connected with the safety belt reinforcing plate, and the rear end of the safety belt reinforcing plate is connected with the rear floor middle cross beam. According to the vehicle body reinforcing structure, a continuous stress structure can be formed between the rear floor front cross beam and the rear floor middle cross beam, collision force can be effectively dispersed and transmitted in the vehicle running process, and therefore the overall strength of a vehicle body and the anti-collision capacity of the vehicle body can be improved; meanwhile, the length of the middle floor connecting plate can be effectively shortened, the mold development difficulty and the whole vehicle weight can be reduced, and therefore the competitiveness of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, in particular to a vehicle body reinforcement structure. Simultaneously, the utility model also relates to a vehicle provided with the vehicle body reinforcement structure. Background Art

[0002] With the advancement of automotive technology, the number of vehicles has increased, and competition among vehicle models has intensified. Vehicle performance has become increasingly important, with floor modal and rear seatbelt strength becoming key indicators. In existing structures, a left and right center floor connecting plate, arranged along the vehicle's fore-and-aft direction, are typically connected between the rear floor front and rear cross members. A seatbelt reinforcement plate and a seat pivot reinforcement plate are also installed between the left and right center floor connecting plates. Furthermore, a raised plate is typically installed on both the left and right center floor connecting plates, connecting them to the seatbelt reinforcement plate and seat pivot reinforcement plate via the raised plate.

[0003] This structure results in the left and right center floor connecting plates being long and irregular in shape, resulting in low material utilization and requiring a large number of molds. Furthermore, the large size of the left and right center floor connecting plates increases the difficulty of mold development and precision requirements, necessitating additional costs. Furthermore, this structure has numerous unnecessary overlapping areas, which increases weight and reduces market competitiveness. Utility Model Content

[0004] In view of this, the present invention aims to propose a vehicle body reinforcement structure to reduce the length of the center floor connecting plate, reduce the difficulty of mold development and reduce the overall weight.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A vehicle body reinforcement structure includes a center floor connecting plate provided below a center floor of a vehicle body, and a seat belt reinforcement plate provided at a rear end of the center floor connecting plate;

[0007] The middle floor connecting plate extends along the front-to-back direction of the vehicle, and the front end of the middle floor connecting plate is connected to the front crossbeam of the rear floor, the rear end of the middle floor connecting plate is connected to the seat belt reinforcement plate, and the rear end of the seat belt reinforcement plate is connected to the middle crossbeam of the rear floor.

[0008] Furthermore, the two center floor connecting plates are arranged opposite to each other in the left-right direction of the vehicle, and the two seat belt reinforcement plates are arranged opposite to each other in the left-right direction of the vehicle;

[0009] The safety belt reinforcement plate on each side is connected to the middle floor connecting plate on the corresponding side.

[0010] Furthermore, at least one of the seat belt reinforcement plates is provided with a protruding portion;

[0011] The protruding portion protrudes along the left-right direction of the entire vehicle, and the two safety belt reinforcement plates are connected together through the protruding portion.

[0012] Furthermore, the two safety belt reinforcement plates are both provided with the protruding parts, and an anti-error structure is provided on one of the protruding parts.

[0013] Furthermore, the error-proofing structure includes a boss provided on one of the protruding portions.

[0014] Furthermore, the center floor connecting plate includes a main portion protruding toward a side away from the center floor of the vehicle body, and an outer flange provided along an edge of the main portion;

[0015] The main body and the vehicle body mid-floor surround a cavity, and the outer flange is connected to the vehicle body mid-floor and the safety belt reinforcement plate.

[0016] Furthermore, the middle floor connecting plate is connected to a seat hook mounting plate provided on the middle floor of the vehicle body.

[0017] Furthermore, an avoidance hole is provided on the safety belt reinforcement plate corresponding to the connection point between the middle floor connecting plate and the seat hook mounting plate.

[0018] Furthermore, the safety belt reinforcement plate is rectangular; and / or,

[0019] A matching protrusion protruding toward one side of the seat hook mounting plate is formed on the middle floor of the vehicle body, and a connecting protrusion is formed on the middle floor connecting plate. The connecting protrusion is embedded in the matching protrusion and is connected to the matching protrusion and the seat hook mounting plate.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The vehicle body reinforcement structure described in the present invention, by arranging a center floor connecting plate and a safety belt reinforcement plate at the rear end of the center floor connecting plate under the center floor of the vehicle body, and connecting the front end of the center floor connecting plate to the front cross beam of the rear floor, and the rear end of the safety belt reinforcement plate to the center cross beam of the rear floor, not only does it not occupy additional space in the vehicle, but also provides support and reinforcement for the center floor; moreover, a continuous force-bearing structure can be formed between the front cross beam of the rear floor and the center cross beam of the rear floor, which can effectively disperse and transmit collision forces during vehicle driving, thereby improving the overall strength of the vehicle body and the collision resistance of the vehicle body; at the same time, it can also effectively shorten the length of the center floor connecting plate, reduce the difficulty of mold development, and reduce the weight of the entire vehicle, which can help improve the competitiveness of the entire vehicle.

[0022] In addition, by arranging the center floor connecting plate and the seat belt reinforcement plate in two relative positions in the left and right directions of the vehicle, it can not only further improve the overall structural strength of the vehicle body, but also help maintain the overall posture of the vehicle body, and better resist external forces that may cause the vehicle body to twist, thereby improving the vehicle's handling performance and ride comfort; at the same time, it can also form more force transmission paths, avoiding the problem of local stress concentration that may occur when the impact force is only transmitted in the single-side structure.

[0023] Secondly, by providing a protruding portion on the seat belt reinforcement plate and connecting the two seat belt reinforcement plates together through the protruding portion, the structural integrity of the vehicle body in the lateral direction can be enhanced, and a lateral force transmission channel can be formed between the two center floor connecting plates, which can make the collision force flow more smoothly and diversified in the entire vehicle body reinforcement structure, effectively avoid the accumulation of collision force in local areas, improve the rear floor mode, reduce the rear floor resonance frequency, and thus improve ride comfort.

[0024] By providing protruding portions on both seat belt reinforcement plates and an anti-error structure on one of the protruding portions, a symmetrical transverse connection structure can be formed for the vehicle body. When the vehicle is subjected to lateral force, the two seat belt reinforcement plates can share the external force more evenly and transmit the force more efficiently through the protruding portions, thereby enhancing the vehicle body's resistance to deformation in the transverse direction. The provision of the anti-error structure allows the installer to quickly and accurately identify the installation direction and position when installing the seat belt reinforcement plates, thereby improving installation efficiency.

[0025] Furthermore, the anti-error structure includes a boss on one of the protruding portions. This not only further enhances the structural strength of the protruding portion, but also features a simple structure, facilitates manufacturing, and provides a clear visual and physical reference. The center floor connecting plate comprises a main portion and an outward flange along its edge. This creates a cavity between the main portion and the center floor of the vehicle body, enhancing the structural strength of the center floor connecting plate and, in turn, the deformation resistance of the entire vehicle body in this area. Furthermore, the cavity provides a certain degree of sound insulation and noise reduction, improving ride comfort. The outward flange facilitates the connection between the center floor connecting plate and the center floor and seatbelt reinforcement plate through the flange.

[0026] In addition, by connecting the center floor connecting plate with the seat hook mounting plate located on the center floor of the vehicle body, when the seat is subjected to external forces, these external forces can be effectively transmitted to the center floor connecting plate through the seat hook mounting plate, and then dispersed and transmitted with the help of the center floor connecting plate, the front and rear cross beams of the rear floor and the seat belt reinforcement plate, thereby effectively avoiding structural deformation or damage in the seat installation area due to local excessive forces, and providing more reliable protection for the safety of children riding in the vehicle.

[0027] By providing clearance holes on the seatbelt reinforcement plate at the connection points between the center floor connecting plate and the seat hook mounting plate, sufficient working space is provided for installation tools and the operator's hands, thereby improving vehicle assembly efficiency. The rectangular shape of the seatbelt reinforcement plate makes its structure relatively simple and regular, which reduces mold development difficulty and mold precision, and also improves the uniformity of force applied to all parts of the seatbelt reinforcement plate.

[0028] In addition, by embedding the connecting protrusion on the center floor connecting plate into the mating protrusion, not only does it provide positioning for the installation of the center floor connecting plate on the center floor of the vehicle body, thereby improving assembly efficiency, but it also forms a tight interlocking connection between the center floor connecting plate and the center floor of the vehicle body, thereby effectively preventing the connecting protrusion from loosening or detaching due to external forces such as vibration and bumps during vehicle driving, greatly improving the stability of the connection between the center floor connecting plate and the center floor of the vehicle body and the seat hook mounting plate, and ensuring the integrity and reliability of the vehicle body reinforcement structure in this area.

[0029] Another object of the present invention is to provide a vehicle provided with the vehicle body reinforcement structure as described above.

[0030] The vehicle described in the present invention can improve the overall strength of the vehicle body and the collision resistance of the vehicle body by providing the vehicle body reinforcement structure as described above; at the same time, it can also effectively shorten the length of the center floor connecting plate, reduce the difficulty of mold development, and reduce the weight of the entire vehicle, thereby helping to improve the competitiveness of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 This is a schematic structural diagram of the vehicle body reinforcement structure according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic structural diagram of the vehicle body reinforcement structure according to an embodiment of the present utility model from another perspective;

[0034] Figure 3 This is a diagram showing the assembly state of the rear floor front cross member, rear floor rear cross member, middle floor connecting plate and seat belt reinforcement plate according to an embodiment of the present utility model;

[0035] Figure 4 This is a schematic structural diagram of the middle floor connecting plate according to an embodiment of the present utility model;

[0036] Figure 5 This is a schematic structural diagram of a safety belt reinforcement plate according to an embodiment of the present utility model.

[0037] Description of reference numerals:

[0038] 1. Middle floor connecting plate; 2. Seat belt reinforcement plate; 3. Rear floor front cross member; 4. Rear floor rear cross member; 5. Rear floor longitudinal member; 6. Seat hook mounting plate;

[0039] 101. Main body; 102. Outer flange; 1021. Connecting protrusion;

[0040] 201. Avoidance hole; 202. Protruding part; 203. Boss. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0042] In describing this utility model, it should be noted that the directional terms used in this embodiment, such as "up, down, left, right, front, and back," are defined with reference to the up-down, left-right, and front-back directions of the vehicle. The up-down direction of the vehicle is also the vehicle's height (Z direction), the front-back direction of the vehicle is also the vehicle's length (X direction), and the left-right direction of the vehicle is also the vehicle's width (Y direction). Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0045] Example 1

[0046] Given that the existing technology suffers from problems such as large left and right center floor connecting plates due to unreasonable structural design, difficulty in mold development, low precision, increased vehicle weight, and low market competitiveness, this embodiment specifically proposes a novel vehicle body reinforcement structure comprising a center floor connecting plate 1 disposed below the center floor of the vehicle body, and a seatbelt reinforcement plate 2 disposed at the rear end of the center floor connecting plate 1.

[0047] Among them, the middle floor connecting plate 1 extends along the front and rear direction of the vehicle, and the front end of the middle floor connecting plate 1 is connected to the front cross beam 3 of the rear floor, the rear end of the middle floor connecting plate 1 is connected to the seat belt reinforcement plate 2, and the rear end of the seat belt reinforcement plate 2 is connected to the middle cross beam of the rear floor.

[0048] This embodiment provides a center floor connecting plate 1 below the center floor of the vehicle body, along with a seatbelt reinforcement plate 2 at the rear end of the center floor connecting plate 1. The front end of the center floor connecting plate 1 is connected to the front cross member 3 of the rear floor, while the rear end of the seatbelt reinforcement plate 2 is connected to the center cross member of the rear floor. This design not only saves space within the vehicle but also provides support and reinforcement for the center floor. Furthermore, a continuous force-bearing structure is formed between the front cross member 3 and the center cross member of the rear floor, effectively dispersing and transmitting collision forces during vehicle operation, thereby improving the overall strength and collision resistance of the vehicle body. Furthermore, the length of the center floor connecting plate 1 can be effectively shortened, reducing mold development complexity and overall vehicle weight, thereby enhancing the overall competitiveness of the vehicle.

[0049] Based on the above overall introduction, an exemplary structure of the vehicle body reinforcement structure of this embodiment is referred to as Figures 1 to 3 As shown in , the same as the prior art is that the rear floor front cross beam 3 and the rear floor middle cross beam are arranged along the left and right directions of the vehicle and connected between the rear floor longitudinal beams 5 on both sides. Figure 1 and Figure 3 As shown in , as a further embodiment, there are two center floor connecting plates 1 arranged opposite to each other in the left-right direction of the vehicle, there are two seat belt reinforcement plates 2 arranged opposite to each other in the left-right direction of the vehicle, and the seat belt reinforcement plates 2 on each side are connected to the center floor connecting plate 1 on the corresponding side.

[0050] Such an arrangement can make the vehicle body reinforcement structure have similar structure and connection relationship on the left and right sides. When the vehicle is subjected to lateral force (such as centrifugal force when turning, side collision force, etc.) during driving, the center floor connecting plate 1 and the seat belt reinforcement plate 2 arranged symmetrically on both sides can enable the vehicle body to bear these lateral forces more evenly. The center floor connecting plate 1 and the seat belt reinforcement plate 2 on the left and right sides can work together to distribute the lateral force evenly to both sides of the vehicle body, avoiding excessive force on one side causing excessive tilt or deformation of the vehicle body, effectively enhancing the lateral stability of the vehicle body and improving the vehicle's handling performance.

[0051] As a specific embodiment, Figure 4As shown in the figure, the center floor connecting plate 1 of this embodiment includes a main portion 101 that protrudes away from the vehicle body center floor, and an outer flange 102 arranged along the edge of the main portion 101. The main portion 101 forms a cavity with the vehicle body center floor structure, while the outer flange 102 connects to the vehicle body center floor and the seatbelt reinforcement plate 2. The main portion 101 acts as a reinforcing rib to absorb some of the external forces when the vehicle encounters bumps or collisions during driving, enhancing the structural strength of the center floor connecting plate 1 and thus improving the deformation resistance of the entire vehicle body in this area. The outer flange 102 facilitates the connection of the center floor connecting plate 1 to the vehicle body center floor and the seatbelt reinforcement plate 2. Furthermore, the cavity formed by the main portion 101 and the vehicle body center floor structure also provides a certain degree of sound insulation and noise reduction, thereby improving ride comfort.

[0052] In addition, in this embodiment, as a further implementation method, combined with Figure 1 and Figure 2 As shown in the figure, the center floor connecting plate 1 is connected to the seat hook mounting plate 6 located on the center floor of the vehicle body. The seat hook mounting plate 6 is capable of mounting child seat hooks. This arrangement allows various external forces acting on the seat during driving to be effectively transmitted to the center floor connecting plate 1 via the seat hook mounting plate 6. These forces are then distributed and transmitted through the connections between the center floor connecting plate 1, the rear floor front cross member 3, the rear floor rear cross member 4, and the seatbelt reinforcement plate 2. This prevents structural deformation or damage to the seat mounting area due to localized excessive force, provides strong structural support for the secure installation of the seat, and enhances child safety.

[0053] As a preferred embodiment, Figure 4 As shown in the figure, the center floor panel of the vehicle body has a mating protrusion formed on it, which projects toward one side of the seat hook mounting plate 6. A connecting protrusion 1021 is also formed on the center floor connecting plate 1. Connecting protrusion 1021 engages with the mating protrusion and connects to the mating protrusion and the seat hook mounting plate 6. This design benefits from the precise positioning of the center floor connecting plate 1 on the center floor panel. During installation, the installer simply aligns and engages connecting protrusion 1021 with the mating protrusion to quickly determine the correct installation position for the center floor connecting plate 1, improving installation efficiency.

[0054] Moreover, the connecting protrusion 1021 is embedded in the matching protrusion, so that the center floor connecting plate 1 is tightly connected with the center floor of the vehicle body and the seat hook mounting plate 6. This kind of interlocking connection can effectively prevent the connection parts from loosening or detaching due to external forces such as vibration and bumps during vehicle driving, thereby greatly improving the stability of the connection. Figure 4As shown in , in order to prevent local stress concentration, as a preferred embodiment, the connecting protrusion 1021 and the matching protrusion are both circular. Of course, in addition to being circular, the connecting protrusion 1021 and the matching protrusion can also be configured in other shapes.

[0055] In addition, if Figure 5 As shown in FIG, as a preferred embodiment, the seat belt reinforcement plate 2 of this embodiment is rectangular. Specifically, the seat belt reinforcement plate 2 is a standard rectangular shape, which also includes Figure 5 The shape shown in the figure is close to a standard rectangle, but there may be some minor irregularities. The basic characteristics of a rectangle are retained as a whole, with relatively long and short sides, and four corners that are relatively close to right angles. By setting the seat belt reinforcement plate 2 to be rectangular, its shape can be made relatively simple and regular, which can reduce the difficulty of mold development and reduce mold precision. In addition, it can also improve the uniformity of force applied to various parts of the seat belt reinforcement plate 2, which helps to avoid local stress concentration, thereby enhancing the structural stability of the seat belt reinforcement plate 2 itself and improving the deformation resistance of the entire vehicle body reinforcement structure. It should be noted that in addition to being set as a rectangle, the seat belt reinforcement plate 2 can also be set to other shapes.

[0056] In addition, to ensure the integrity of the cavity structure, e.g. Figure 3 As shown in FIG, as a preferred embodiment, the seatbelt reinforcement plate 2 is connected to the bottom of the center floor connecting plate 1. To this end, a clearance hole 201 is provided in the seatbelt reinforcement plate 2, corresponding to the connection point between the center floor connecting plate 1 and the seat hook mounting plate 6. The provision of the clearance hole 201 provides sufficient operating space for installation tools and the operator's hands, thereby improving vehicle assembly efficiency.

[0057] As a further embodiment, at least one of the seatbelt reinforcement plates 2 is provided with a protrusion 202 that extends in the left-right direction of the vehicle. The two seatbelt reinforcement plates 2 are connected together via this protrusion 202. This enhances the vehicle body's lateral structural integrity and reduces the possibility of relative displacement or inconsistent deformation between the two seatbelt reinforcement plates 2 due to lateral forces. Furthermore, a transverse force transmission channel is formed between the two center floor connecting plates 1, allowing collision forces to flow more smoothly and diversely throughout the vehicle body reinforcement structure. This effectively prevents the accumulation of collision forces in localized areas, enhances the rear floor modal state, and reduces the rear floor resonant frequency, thereby improving ride comfort.

[0058] And as Figure 3As shown in , as a preferred embodiment, both seat belt reinforcement plates 2 are provided with a protruding portion 202, and an anti-error structure is provided on the protruding portion 202 on the right side. In this embodiment, by providing protruding portions 202 on both seat belt reinforcement plates 2 and connecting them to each other, a more stable vehicle body structure can be formed. When the vehicle is subjected to lateral force, the two seat belt reinforcement plates 2 can share the external force more evenly and transmit the force more efficiently through the protruding portion 202, thereby enhancing the vehicle body's anti-deformation ability in the lateral direction and further improving the stability of the vehicle body's overall structure. The provision of the anti-error structure allows the installer to quickly and accurately identify the installation direction and position by relying on the anti-error structure when installing the seat belt reinforcement plate 2, thereby improving installation efficiency.

[0059] Among them, such as Figure 5 As shown in , as a specific structure, the anti-error structure of this embodiment includes a boss 203 provided on the protruding portion 202 of the right seat belt reinforcement plate 2. The anti-error structure adopts the design of the boss 203, which not only further improves the structural strength of the protruding portion 202, but also the boss 203 has a simple structure, is easy to process and manufacture, and can provide a clear visual and physical reference. It should be noted that in addition to the boss 203, the anti-error structure can also adopt other forms such as pits. In addition, in addition to providing an anti-error structure on the right seat belt reinforcement plate 2, an anti-error structure can also be provided on the left seat belt reinforcement plate 2.

[0060] The vehicle body reinforcement structure of this embodiment adopts the above structure, which can reduce the difficulty of mold development and reduce mold precision. In addition, the center floor connecting plate 1 and the seat belt reinforcement plate 2 on both sides are designed to be parts with the same large shape and size, with only slight changes in local features. In this way, the mold can be common-molded on the left and right sides, which can reduce the difficulty of mold development and reduce development costs and cycles.

[0061] Furthermore, the rear floor longitudinal beams 5, rear floor front cross member 3, rear floor rear cross member 4, center floor connecting plate 1, and seatbelt reinforcement plate 2 form a four-shaped force transmission path. A transverse force transmission path is also formed between the seatbelt reinforcement plates 2 on both sides. This improves the rear floor's modal properties, reduces resonance, and enhances ride comfort. Furthermore, the reduced overlap between the center floor connecting plate 1 and the seatbelt reinforcement plates 2 contributes to a reduction in vehicle weight.

[0062] Example 2

[0063] This embodiment relates to a vehicle, and the vehicle is provided with the vehicle body reinforcement structure of the first embodiment.

[0064] The vehicle of this embodiment can improve the overall strength of the vehicle body and the collision resistance of the vehicle body by providing the above-mentioned vehicle body reinforcement structure; at the same time, it can also effectively shorten the length of the center floor connecting plate 1, reduce the difficulty of mold development, and reduce the weight of the entire vehicle, thereby helping to improve the competitiveness of the entire vehicle.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle body reinforcement structure, characterized in that: It comprises a middle floor connecting plate (1) arranged below the middle floor of the vehicle body, and a safety belt reinforcing plate (2) arranged at the rear end of the middle floor connecting plate (1); The middle floor connecting plate (1) extends in the front-to-rear direction of the vehicle, and the front end of the middle floor connecting plate (1) is connected to the front crossbeam (3) of the rear floor, the rear end of the middle floor connecting plate (1) is connected to the safety belt reinforcement plate (2), and the rear end of the safety belt reinforcement plate (2) is connected to the middle crossbeam of the rear floor.

2. The vehicle body reinforcement structure according to claim 1, wherein: The two middle floor connecting plates (1) are arranged opposite to each other in the left-right direction of the vehicle, and the two safety belt reinforcement plates (2) are arranged opposite to each other in the left-right direction of the vehicle; The safety belt reinforcement plate (2) on each side is connected to the middle floor connecting plate (1) on the corresponding side.

3. The vehicle body reinforcement structure according to claim 2, wherein: At least one of the safety belt reinforcement plates (2) is provided with a protruding portion (202); The protruding portion (202) protrudes in the left-right direction of the entire vehicle, and the two safety belt reinforcement plates (2) are connected together via the protruding portion (202).

4. The vehicle body reinforcement structure according to claim 3, characterized in that: The two safety belt reinforcement plates (2) are both provided with the protruding portion (202), and an anti-error structure is provided on one of the protruding portions (202).

5. The vehicle body reinforcement structure according to claim 4, characterized in that: The error-proofing structure includes a boss (203) provided on one of the protruding parts (202).

6. The vehicle body reinforcement structure according to claim 1, characterized in that: The middle floor connecting plate (1) comprises a main body portion (101) protruding toward a side away from the vehicle body middle floor, and an outer flange (102) provided along an edge of the main body portion (101); The main body (101) and the vehicle body mid-floor enclose a cavity, and the outer flange (102) is connected to the vehicle body mid-floor and the safety belt reinforcement plate (2).

7. The vehicle body reinforcement structure according to any one of claims 1 to 6, characterized in that: The middle floor connecting plate (1) is connected to a seat hook mounting plate (6) provided on the middle floor of the vehicle body.

8. The vehicle body reinforcement structure according to claim 7, characterized in that: Corresponding to the connection point between the middle floor connecting plate (1) and the seat hook mounting plate (6), an avoidance hole (201) is provided on the safety belt reinforcement plate (2).

9. The vehicle body reinforcement structure according to claim 7, characterized in that: The safety belt reinforcement plate (2) is rectangular; and / or, A matching protrusion protruding toward one side of the seat hook mounting plate (6) is formed on the vehicle body middle floor, and a connecting protrusion (1021) is formed on the middle floor connecting plate (1). The connecting protrusion (1021) is embedded in the matching protrusion and connected to the matching protrusion and the seat hook mounting plate (6).

10. A vehicle, characterized in that: The vehicle is provided with the vehicle body reinforcement structure according to any one of claims 1 to 9.

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