Vehicle body floor structure and vehicle

Abstract

The utility model provides a vehicle body floor structure and a vehicle. The vehicle body floor structure comprises a front floor unit and a rear floor unit, the front floor unit comprises a main body part and a rear extension plate which is arranged in a penetrating manner in the left-right direction of the whole vehicle; the rear extension plate is in lap joint with the rear end of the main body part, and the lap joint position of the rear extension plate on the main body part is adjustable in the front-back direction of the whole vehicle. According to the vehicle body floor structure, by adjusting the lap joint position of the rear extension plate on the main body part, the length of the front floor unit can be adjusted, and the universality of the vehicle body floor structure on vehicle types with different wheelbases can be improved.

Description

Technical Field

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

[0002] In the current automobile manufacturing industry, as consumer demands become increasingly diversified and personalized, the diversification of vehicle design has become an important trend in the industry. Vehicles with different wheelbases not only meet the needs of different driving scenarios, but also provide drivers with a more diversified driving experience. As one of the core components of a car, the design and manufacturing of the body floor structure are closely related to the performance of the entire vehicle.

[0003] In the traditional production model, the body floor structures of different wheelbases and models are usually designed independently, and the body floor structures of each model require specific vehicle parts to be welded together. These vehicle parts are often only applicable to the corresponding models. When the production line switches to the production of another model, the corresponding vehicle parts need to be remade according to the new model design, which undoubtedly increases the production cost and cycle, and also reduces the flexibility and efficiency of the production line.

[0004] Due to the irregular shapes and irregular edges of existing vehicle parts during production, a large number of welding points are often required during welding to ensure the stability of the structure. This not only increases the complexity of the manufacturing process, but also may lead to a reduction in structural strength. At the same time, due to the large number of welding points, the overall performance of the vehicle floor structure may also be affected. Therefore, the existing vehicle parts constituting the vehicle body floor have poor versatility and have the hidden danger of low structural strength. Utility Model Content

[0005] In view of this, the utility model aims to provide a vehicle body floor structure to improve the versatility of the front floor on vehicle models with different wheelbases.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A vehicle body floor structure includes a front floor unit;

[0008] The front floor unit includes a main body and a rear extension plate that is arranged through the vehicle in the left-right direction;

[0009] The rear extension plate is overlapped on the rear end of the main body, and in the front-rear direction of the whole vehicle, the overlap position of the rear extension plate on the main body is adjustable.

[0010] Furthermore, the main body includes a front floor middle channel, and a left front floor and a right front floor respectively arranged on the left and right sides of the front floor middle channel;

[0011] The rear extension plate includes a middle arched section overlapped on the middle channel of the front floor, and side sections arranged on the left and right sides of the middle arched section, and the side sections on both sides are overlapped on the left front floor and the right front floor respectively.

[0012] Furthermore, the left front floor and the right front floor are both provided with first convex ribs arranged along the front-rear direction of the vehicle;

[0013] Corresponding to each of the first convex ribs, a second convex rib is respectively provided on the two side sections; each of the second convex ribs is overlapped on the corresponding first convex rib.

[0014] Furthermore, the front floor unit further includes front floor longitudinal beams respectively arranged at the bottom of the left front floor and the right front floor, and longitudinal beam reinforcement plates respectively arranged corresponding to the front floor longitudinal beams;

[0015] Each of the longitudinal beam reinforcement plates is respectively located below the side section on the corresponding side, and the front end of each of the longitudinal beam reinforcement plates is overlapped and connected to the front floor longitudinal beam, and the rear end of each of the longitudinal beam reinforcement plates is overlapped and connected to the front cross beam of the rear floor.

[0016] Furthermore, the projection of the front end edge of the rear extension plate in the vertical direction of the entire vehicle is in a straight line shape.

[0017] Furthermore, it also includes a rear floor front cross beam and a rear floor which are sequentially arranged behind the front floor unit along the front-rear direction of the vehicle;

[0018] The rear floor front cross beam comprises a main beam body and a front cross beam reinforcement plate buckled on the main beam body;

[0019] The rear end of the rear extension plate is clamped between the main beam body and the front cross beam reinforcement plate.

[0020] Furthermore, the main beam body is bent and includes a bottom plate body, a middle plate body and a top plate body connected together, and the front cross beam reinforcement plate is bent and includes a lower plate, a vertical plate and an upper plate connected together;

[0021] The lower plate is arranged on the bottom plate body, the upper plate is arranged on the top plate body, and a chamber is formed between the vertical plate and the middle plate body.

[0022] Furthermore, the vertical plate is extended from the rear end of the lower plate toward the top of the vehicle, and the middle plate body is inclined toward the upper rear of the vehicle.

[0023] Furthermore, the rear end of the rear extension plate is clamped between the lower plate and the bottom plate body, and the front end of the rear floor plate is clamped between the upper plate and the top plate body.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] The vehicle body floor structure described in the utility model makes the length of the front floor unit in the front-to-rear direction of the vehicle adjustable by adjusting the overlapping position of the rear extension plate on the main body, thereby facilitating the versatility of the front floor unit on vehicle models with different wheelbases, simplifying the number of components constituting the front floor unit, and improving the welding efficiency of the front floor unit.

[0026] The segmented arched structure of the rear extension plate is adapted to the shape of the channel in the front floor of the main body and the front floors on both sides, so that the overlapped cooperation between the rear extension plate and the main body is easily achieved.

[0027] The rib structure can enhance the structural strength of the plate. The ribs are arranged along the front and rear direction of the vehicle to facilitate the adjustment of the overlapped parts.

[0028] The setting of the front floor longitudinal beam and the longitudinal beam reinforcement plate can play a good supporting and structural strengthening role.

[0029] The seams between the left and right front floors, the front floor center channel and the front floor rear extension plate are made into a straight line, so that the front floor rear extension plate of models with different wheelbases can be better overlapped with the left and right front floors and the center channel.

[0030] The front cross beam of the rear floor is divided into two parts: the main beam body and the front cross beam reinforcement plate, which is convenient for the processing and manufacturing of the beam body. The rear extension plate is clamped between the main beam body and the front cross beam reinforcement plate to improve the connection strength between the rear extension plate and the cross beam.

[0031] The plates with a bent structure are buckled together to form a cavity structure, which can improve the structural performance of the beam.

[0032] The vertical plate is extended upward from the rear end of the lower plate, which provides convenient conditions for raising the height of the rear floor, and the middle plate is tilted toward the upper rear of the vehicle, which is beneficial to improving the supporting performance of the main beam.

[0033] The rear end of the rear extension plate is clamped between the lower plate and the bottom plate body, which is beneficial to improving the connection reliability between the rear extension plate and the main beam body, and the front end of the rear floor is clamped between the upper plate and the top plate body, which is beneficial to improving the connection reliability between the rear floor and the main beam body.

[0034] The utility model also provides a vehicle, wherein the vehicle is provided with the vehicle body floor structure as described above.

[0035] The vehicle described in the present invention has the same beneficial effects as the above-mentioned vehicle body floor structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0037] Figure 1 This is a structural schematic diagram of the vehicle body floor structure according to an embodiment of the utility model;

[0038] Figure 2 It is a structural schematic diagram of the vehicle body floor structure according to an embodiment of the utility model from another angle;

[0039] Figure 3 A top view of the vehicle body floor structure according to an embodiment of the utility model;

[0040] Figure 4 A bottom view of the vehicle body floor structure according to an embodiment of the utility model;

[0041] Figure 5 This is a structural schematic diagram of a rear extension plate of a vehicle body floor structure according to an embodiment of the utility model;

[0042] Figure 6 for Figure 3 The local cross-section diagram at AA;

[0043] Description of reference numerals:

[0044] 1. Main body;

[0045] 101. middle channel of front floor; 102. left front floor; 103. right front floor; 104. first convex rib;

[0046] 2. Rear extension board;

[0047] 201, middle arched section; 202, side section; 203, second convex rib;

[0048] 3. Front floor longitudinal beam; 4. Longitudinal beam reinforcement plate;

[0049] 5. Front crossbeam of rear floor;

[0050] 501, main beam; 5011, bottom plate; 5012, middle plate; 5013, top plate;

[0051] 502, front crossbeam reinforcement plate; 5021, lower plate; 5022, vertical plate; 5023, upper plate;

[0052] 6. Rear floor;

[0053] s. chamber. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0055] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0056] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In addition, in the description of the present invention, unless otherwise clearly defined, the mating parts may be connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0058] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0059] Embodiment 1

[0060] The present embodiment relates to a vehicle body floor structure to improve the versatility of the front floor on vehicle models with different wheelbases.

[0061] In terms of overall structure, combined Figure 1 and Figure 2 As shown, the vehicle body floor structure of this embodiment includes a front floor unit, which includes a main body 1 and a rear extension plate 2 that is arranged to pass through the vehicle in the left-right direction. The rear extension plate 2 is overlapped at the rear end of the main body 1, and the overlap position of the rear extension plate 2 on the main body 1 in the front-rear direction of the vehicle is adjustable.

[0062] As configured above, the vehicle body floor structure in this embodiment makes the length of the front floor unit in the front-to-rear direction of the vehicle adjustable by adjusting the overlap position of the rear extension plate 2 on the main body 1, thereby facilitating the versatility of the front floor unit on vehicle models with different wheelbases, and simplifies the number of components constituting the front floor unit, thereby improving the welding efficiency of the front floor unit.

[0063] In order to facilitate the overlap and cooperation between the rear extension plate 2 and the main body 1, Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the main body 1 in this embodiment includes a front floor middle channel 101, and a left front floor 102 and a right front floor 103 respectively arranged on the left and right sides of the front floor middle channel 101, the rear extension plate 2 includes a middle arched section 201 overlapped on the front floor middle channel 101, and side sections 202 respectively arranged on the left and right sides of the middle arched section 201, the side sections 202 on both sides are overlapped on the left front floor 102 and the right front floor 103 respectively, through the segmented arched structure setting of the rear extension plate 2, and adapted to the shape of the front floor middle channel 101 and the front floors on both sides of the main body 1, it is convenient to realize the overlapping cooperation between the rear extension plate 2 and the main body 1.

[0064] Specifically, the front floor middle channel 101 in this embodiment is arched upward gradually compared to the left front floor 102 and the right front floor 103 arranged on the left and right sides of the front floor middle channel 101, so that the front floor middle channel 101 can reduce the space occupied by the vehicle cabin while accommodating the vehicle axle body, which is beneficial to the arrangement of other structures on the vehicle and improves space utilization.

[0065] In order to facilitate the adjustment of the overlapping parts, Figure 3 As shown, the left front floor 102 and the right front floor 103 of the vehicle body floor structure in this embodiment are both provided with first convex ribs 104 arranged along the front-rear direction of the vehicle, and corresponding to each first convex rib 104, second convex ribs 203 are respectively provided on the two side sections 202; each second convex rib 203 is overlapped on the corresponding first convex rib 104, and the arrangement of the convex rib structure can enhance the structural strength of the plate body. The convex ribs are arranged along the front-rear direction of the vehicle, which is convenient for adjusting the overlapped parts.

[0066] Specifically, the first rib 104 and the second rib 203 enhance the respective structural strengths of the main body 1 and the rear extension plate 2, and the second rib 203 overlaps the first rib 104, thereby increasing the structural strength of the connection. When adjusting the length of the front floor unit, it is convenient to position the main body 1 and the rear extension plate 2, and the structure is simple, which is conducive to design implementation.

[0067] In order to improve the structural strength of the vehicle body floor structure, combined with Figure 2 and Figure 4 As shown, the front floor unit in this embodiment also includes front floor longitudinal beams 3 respectively arranged at the bottom of the left front floor 102 and the right front floor 103, and longitudinal beam reinforcement plates 4 respectively arranged corresponding to each front floor longitudinal beam 3. Each longitudinal beam reinforcement plate 4 is respectively located below the side section 202 on the corresponding side, and the front end of each longitudinal beam reinforcement plate 4 is overlapped and connected with the front floor longitudinal beam 3, and the rear end of each longitudinal beam reinforcement plate 4 is overlapped and connected with the rear floor front cross beam 5. The arrangement of the front floor longitudinal beams 3 and the longitudinal beam reinforcement plates 4 can play a good supporting and structural reinforcement role.

[0068] Specifically, front floor longitudinal beams 3 arranged along the front-rear direction of the vehicle are respectively provided on the bottom plates of the left front floor 102 and the right front floor 103. The front floor longitudinal beams 3 are located in the middle of the left front floor 102 and the right front floor 103, and can improve the supporting strength of the middle of the left front floor 102 and the right front floor 103. In coordination with this, the longitudinal beam reinforcement plate 4 can improve the supporting strength of the middle of the two side sections 202 of the rear extension plate 2, and the longitudinal beam reinforcement plate 4 is overlapped on the front floor longitudinal beam 3, which is convenient for adjusting the position of the rear extension plate 2 and facilitating the adjustment of the length of the front floor unit.

[0069] In order to facilitate the overlap of the rear extension plate 2 with the left and right front floors 103 and the middle channel, Figure 3 and Figure 4 As shown, the projection of the front edge of the rear extension plate 2 in the present embodiment in the up and down direction of the vehicle is in a straight line, so that the left and right front floors 103, the front floor middle channel 101 and the front floor rear extension plate 2 are divided into a straight line, so that the front floor rear extension plate 2 of different wheelbase models can be better overlapped with the left and right front floors 103 and the middle channel.

[0070] Specifically, when the projection of the front edge of the rear extension plate 2 in the up and down direction of the vehicle is in a straight line, it is convenient to adjust the position of the rear extension plate 2 on the main body 1. When it is necessary to adjust the overlapping position of the rear extension plate 2 on the main body 1 corresponding to different wheelbases, it is only necessary to adjust the size of the rear extension plate 2 along the length direction of the vehicle, and then overlap the rear extension plate 2 on the main body 1 to achieve the adjustment of the length of the front floor unit.

[0071] In more detail, the projection of the front edge of the rear extension plate 2 is linear, which is convenient for the manufacture of the mold of the rear extension plate 2 and the cutting of the raw materials of the rear extension plate 2, and when the rear extension plate 2 is stamped on the mold, the plate of suitable length can be placed in the same mold for stamping and forming. The size of the rear extension plate 2 along the length direction of the vehicle can be adjusted by only adjusting the position of the plate in the mold, which is conducive to design implementation.

[0072] In order to facilitate the processing and manufacturing of the body floor structure, combined with Figures 1 to 4As shown, the vehicle body floor structure in this embodiment also includes a rear floor front cross beam 5 and a rear floor 6 which are sequentially arranged behind the front floor unit along the front and rear directions of the vehicle. The rear floor front cross beam 5 includes a main beam body 501 and a front cross beam reinforcement plate 502 which is buckled on the main beam body 501. The rear end of the rear extension plate 2 is clamped between the main beam body 501 and the front cross beam reinforcement plate 502. The rear floor front cross beam 5 is divided into two parts, namely the main beam body 501 and the front cross beam reinforcement plate 502, which is convenient for the processing and manufacturing of the beam body. The rear extension plate 2 is clamped between the main beam body 501 and the front cross beam reinforcement plate 502, which is convenient for improving the connection strength between the rear extension plate 2 and the cross beam.

[0073] Specifically, the main beam body 501 and the front beam reinforcement plate 502 of the rear floor front beam 5 in this embodiment are respectively welded to the upper and lower surfaces of the rear end of the rear extension plate 2, and the rear extension plate 2 is clamped between the main beam body 501 and the front beam reinforcement plate 502, which facilitates the welding process of the rear extension plate 2, the main beam body 501 and the front beam reinforcement plate 502, and helps to improve processing efficiency.

[0074] In order to improve the structural performance of the beam, Figure 6 As shown, the main beam body 501 in this embodiment is bent, and includes a bottom plate body 5011, a middle plate body 5012 and a top plate body 5013 connected together, the front cross beam reinforcement plate 502 is bent, and includes a lower plate 5021, a vertical plate 5022 and an upper plate 5023 connected together, the lower plate 5021 is arranged on the bottom plate body 5011, the upper plate 5023 is arranged on the top plate body 5013, and a cavity s is formed between the vertical plate 5022 and the middle plate body 5012. The plates with a bent structure are buckled together to facilitate the formation of a cavity structure, which can improve the structural performance of the beam body.

[0075] Specifically, the cross-section of the main beam body 501 along the length direction of the vehicle body in this embodiment is in a "Z"-shaped structure, which can increase the height of the rear floor 6 while ensuring the structural strength of the transition area between the rear extension plate 2 and the rear floor 6. In coordination with this, the front cross beam reinforcement plate 502 arranged under the main beam body 501 strengthens the structure of the main beam body 501, and the chamber s formed between the main beam body 501 can provide better structural strength, and is beneficial to the force transmission during the side collision of the vehicle, thereby improving the strength and collision performance of the entire vehicle.

[0076] In order to raise the height of the rear floor 6, Figure 6 As shown, the vertical plate 5022 of the vehicle body floor structure in this embodiment is extended from the rear end of the lower plate 5021 toward the top of the vehicle, and the middle plate body 5012 is inclined toward the upper rear of the vehicle, so that the vertical plate 5022 is extended upward from the rear end of the lower plate 5021, which provides convenient conditions for raising the height of the rear floor 6, and the inclined setting of the middle plate body 5012 toward the upper rear of the vehicle is beneficial to improving the supporting performance of the main beam body 501.

[0077] In order to improve the connection reliability between the rear extension plate 2 and the adjacent structure, Figure 6 As shown, the rear end of the rear extension plate 2 of the vehicle body floor structure in this embodiment is clamped between the lower plate 5021 and the bottom plate body 5011, and the front end of the rear floor 6 is clamped between the upper plate 5023 and the top plate body 5013, so that the rear end of the rear extension plate 2 is clamped between the lower plate 5021 and the bottom plate body 5011, which is beneficial to improving the connection reliability of the rear extension plate 2 and the main beam body 501, and the front end of the rear floor 6 is clamped between the upper plate 5023 and the top plate body 5013, which is beneficial to improving the connection reliability of the rear floor 6 and the main beam body 501.

[0078] The vehicle body floor structure of this embodiment can adjust the length of the front floor unit by adjusting the overlapping position of the rear extension plate 2 on the main body 1, which is conducive to adapting to the floor design requirements of vehicles with different wheelbases, and the arrangement of the ribs and longitudinal beams on the main body 1 and the rear extension plate 2 can effectively improve the supporting strength and structural strength of the front floor unit. The arrangement of the rear floor front cross beam 5 facilitates the lifting transition of the rear extension plate 2 and the rear floor 6, and can improve the structural strength of the transition area between the rear floor 6 and the rear extension plate 2. In addition, a chamber s is formed between the main beam body 501 of the rear floor front cross beam 5 and the front cross beam reinforcement plate 502, which is conducive to the transmission of force in a side collision of the vehicle, thereby improving the structural strength and collision performance of the entire vehicle.

[0079] The vehicle body floor structure of this embodiment can adapt to the layout requirements of the floor structure of vehicles with different wheelbases, and can ensure the strength of the vehicle's bottom plate structure. It is also easy to adjust the length of the front floor unit to adapt to the wheelbase, which can improve the processing efficiency and use quality of the vehicle.

[0080] Embodiment 2

[0081] This embodiment relates to a vehicle, in which the vehicle body floor structure in the first embodiment is provided.

[0082] The vehicle in this embodiment, through the setting of the body floor structure in Example 1, the body floor structure in this embodiment can adapt to the layout requirements of the floor structure of vehicles with different wheelbases, and can ensure the strength of the vehicle's bottom plate structure, and is easy to adjust the length of the front floor unit to adapt to the wheelbase, which can improve the processing efficiency and use quality of the vehicle.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body floor structure, characterized in that: Includes front floor unit; The front floor unit comprises a main body (1) and a rear extension plate (2) which is arranged to pass through the entire vehicle in the left-right direction; The rear extension plate (2) is overlapped with the rear end of the main body (1), and in the front-rear direction of the whole vehicle, the overlap position of the rear extension plate (2) on the main body (1) is adjustable.

2. The vehicle body floor structure according to claim 1, characterized in that: The main body (1) comprises a front floor middle channel (101), and a left front floor (102) and a right front floor (103) respectively arranged on the left and right sides of the front floor middle channel (101); The rear extension plate (2) comprises a middle arched section (201) overlapped on the front floor middle channel (101), and side sections (202) arranged on the left and right sides of the middle arched section (201), and the side sections (202) on both sides are overlapped on the left front floor (102) and the right front floor (103) respectively.

3. The vehicle body floor structure according to claim 2, characterized in that: The left front floor (102) and the right front floor (103) are both provided with a first convex rib (104) arranged along the front-rear direction of the vehicle; Corresponding to each of the first convex ribs (104), a second convex rib (203) is respectively provided on the two side sections (202); each of the second convex ribs (203) is overlapped on the first convex rib (104) corresponding thereto.

4. The vehicle body floor structure according to claim 2, characterized in that: The front floor unit further comprises front floor longitudinal beams (3) respectively arranged at the bottom of the left front floor (102) and the right front floor (103), and longitudinal beam reinforcement plates (4) respectively arranged corresponding to each of the front floor longitudinal beams (3); Each of the longitudinal beam reinforcement plates (4) is located below the side section (202) on the corresponding side, and the front end of each of the longitudinal beam reinforcement plates (4) is overlapped and connected to the front floor longitudinal beam (3), and the rear end of each of the longitudinal beam reinforcement plates (4) is overlapped and connected to the front cross beam (5) of the rear floor.

5. The vehicle body floor structure according to claim 1, characterized in that: The projection of the front end edge of the rear extension plate (2) in the vertical direction of the entire vehicle is in the shape of a straight line.

6. The vehicle body floor structure according to any one of claims 1 to 5, characterized in that: It also includes a rear floor front cross beam (5) and a rear floor (6) which are sequentially arranged behind the front floor unit along the front-rear direction of the vehicle; The rear floor front cross beam (5) comprises a main beam body (501) and a front cross beam reinforcement plate (502) buckled onto the main beam body (501); The rear end of the rear extension plate (2) is clamped between the main beam body (501) and the front cross beam reinforcement plate (502).

7. The vehicle body floor structure according to claim 6, characterized in that: The main beam body (501) is bent and includes a bottom plate body (5011), a middle plate body (5012) and a top plate body (5013) connected together; the front cross beam reinforcement plate (502) is bent and includes a lower plate (5021), a vertical plate (5022) and an upper plate (5023) connected together; The lower plate (5021) is disposed on the bottom plate (5011), the upper plate (5023) is disposed on the top plate (5013), and a chamber (s) is formed between the vertical plate (5022) and the middle plate (5012).

8. The vehicle body floor structure according to claim 7, characterized in that: The vertical plate (5022) is extended from the rear end of the lower plate (5021) toward the top of the vehicle, and the middle plate body (5012) is inclined toward the upper rear of the vehicle.

9. The vehicle body floor structure according to claim 7, characterized in that: The rear end of the rear extension plate (2) is clamped between the lower plate (5021) and the bottom plate body (5011), and the front end of the rear floor (6) is clamped between the upper plate (5023) and the top plate body (5013).

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

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