Vehicle body floor frame structure and vehicle

Abstract

The invention provides a vehicle body floor frame structure and a vehicle. The vehicle body floor frame structure comprises a front wall cross beam, a penetrating cross beam and a rear floor rear cross beam. The penetrating longitudinal beams are located on the left and right sides of the middle channel; first cable-stayed beams are formed at the two ends of the front wall cross beam respectively, and the first ends of the first cable-stayed beams are located at the joint of the front wall cross beam and the first end of the front cabin longitudinal beam rear section of the vehicle. The second end of the first cable-stayed beam, the second end of the front cabin longitudinal beam rear section and the middle channel are all connected to the penetrating cross beam. And the penetrating cross beam, the penetrating longitudinal beam, the rear floor rear cross beam and the doorsill beam are combined to define a mounting plane of a power battery pack of the vehicle. Impact force from the front of the vehicle can be dispersed, the extrusion risk of a passenger compartment behind the front wall cross beam and a power battery pack behind the penetrating cross beam is reduced, and the battery capacity is improved through the flat design of the lower portion of the vehicle body floor, so that the endurance mileage of the whole vehicle is increased.

Description

Technical Field

[0001] This application relates to the technical field of vehicle bodies, and particularly to a body floor frame structure and a vehicle. Background Art

[0002] As a new energy vehicle, an electric vehicle has the advantages of energy conservation and environmental protection. The battery pack of an electric vehicle is generally arranged under the body floor. The size of the space where the battery pack is located determines the battery capacity of the battery pack, and thus determines the cruising range of the whole vehicle.

[0003] Currently, a common problem in the field of electric vehicles is that the cruising range of the electric vehicle battery is limited. In order to improve the cruising range of the whole vehicle, a larger space needs to be provided for the battery pack. Some load-bearing beams in the traditional body floor frame structure are cancelled, thereby reducing the strength of the body skeleton. To ensure the body strength, the lower body frame of the vehicle needs to be strengthened. Summary of the Invention

[0004] The embodiments of this application provide a body floor frame structure and a vehicle to solve the problem of how to increase the installation space of the battery pack while ensuring the strength of the body floor frame.

[0005] In a first aspect, the embodiments of this application provide a body floor frame structure, including:

[0006] A front bulkhead cross beam, a through cross beam, and a rear floor rear cross beam;

[0007] Through longitudinal beams located on both sides of the vehicle's middle channel, and the through longitudinal beams are sequentially connected to the front bulkhead cross beam, the through cross beam, and the rear floor rear cross beam;

[0008] First diagonal beams are respectively formed at both ends of the front bulkhead cross beam. The first end of the first diagonal beam is located at the connection between the front bulkhead cross beam and the first end of the rear section of the vehicle's front engine compartment longitudinal beam;

[0009] The second end of the first diagonal beam, the second end of the rear section of the front engine compartment longitudinal beam, and the middle channel are all connected to the through cross beam;

[0010] Wherein, the through cross beam, the through longitudinal beams, the rear floor rear cross beam, and the vehicle's sill beam are combined to enclose and form the installation plane of the vehicle's power battery pack.

[0011] Further, the through longitudinal beam includes: a front connecting plate, a front floor lower longitudinal beam, and a rear connecting plate;

[0012] Wherein, the front connecting plate is located between the front bulkhead cross beam and the through cross beam;

[0013] The front underfloor longitudinal beam is located between the through beam and the front cross beam of the rear floor of the vehicle for installing the rear seats;

[0014] The rear connecting plate is located between the front cross beam of the rear floor and the rear cross beam of the rear floor.

[0015] Furthermore, a cavity structure is formed between the front underfloor longitudinal beam and the middle channel.

[0016] Furthermore, the front underfloor longitudinal beam includes a first beam body and a second beam body, the second beam body is bent relative to the first beam body, and the cross section of the front underfloor longitudinal beam is L-shaped;

[0017] The cross section of the middle channel is arched;

[0018] The cavity structure is formed between the first beam body, the second beam body and the middle channel.

[0019] Furthermore, the lower end surfaces of the through beam, the through longitudinal beam, the rear cross beam of the rear floor and the sill beam of the vehicle are located in the same plane.

[0020] Furthermore, it further includes:

[0021] The front upper floor longitudinal beam located between the through beam and the front cross beam of the front floor of the vehicle for installing the front seats;

[0022] The first end of the front upper floor longitudinal beam is connected to the second end of the rear section of the front engine compartment longitudinal beam, and the second end of the front upper floor longitudinal beam is connected to the front cross beam of the front floor.

[0023] Furthermore, through holes corresponding to the screw holes on the power battery pack are provided on the through beam, the through longitudinal beam, the rear cross beam of the rear floor and the sill beam.

[0024] Furthermore, a torque box is provided between the first diagonal beam of the front wall cross beam and the through beam;

[0025] Wherein, a second diagonal beam and a third diagonal beam are formed between the torque box and the through beam.

[0026] Furthermore, it further includes:

[0027] The rear floor longitudinal beam for connecting the rear cross beam of the rear floor and the sill beam.

[0028] In a second aspect, an embodiment of the present application further provides a vehicle, and the vehicle includes the above-mentioned body floor frame structure.

[0029] The embodiment of the present application at least includes the following technical effects:

[0030] In the technical solution of the embodiment of the present application, by arranging a first diagonal tension beam at the connection between the front bulkhead cross beam and the first end of the rear section of the front engine compartment longitudinal beam of the vehicle, the first diagonal tension beam extends from the connection between the front bulkhead cross beam and the first end of the rear section of the front engine compartment longitudinal beam of the vehicle to penetrate the cross beam, and a longitudinally penetrating longitudinal beam is arranged, so that the collision impact force from the front of the vehicle is transmitted to the front bulkhead cross beam, the first diagonal tension beam, the penetrating cross beam and the longitudinal beam through the rear section of the front engine compartment longitudinal beam, thereby the impact force of the collision impact force from the front of the vehicle can be dispersed, and the risk of extrusion of the rear passenger compartment of the front bulkhead cross beam and the power battery pack behind the penetrating cross beam is reduced. By arranging the lower end surfaces of the penetrating cross beam, the longitudinal beam, the rear cross beam of the rear floor and the sill beam of the vehicle in the same plane, the flatness of the lower part of the vehicle body floor can be ensured, and further the installation space of the power battery pack is ensured, the battery capacity is increased, and thus the cruising range of the whole vehicle is improved. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0032] Figure 1 is a three-dimensional structural schematic diagram of the vehicle body floor frame structure provided by the embodiment of the present application;

[0033] Figure 2 is one of the top-view structural schematic diagrams of the vehicle body floor frame structure provided by the embodiment of the present application;

[0034] Figure 3 is a side-view structural schematic diagram of the vehicle body floor frame structure provided by the embodiment of the present application;

[0035] Figure 4 is the other top-view structural schematic diagram of the vehicle body floor frame structure provided by the embodiment of the present application;

[0036] Figure 5 is a three-dimensional structural schematic diagram of the front bulkhead structure provided by the embodiment of the present application;

[0037] Figure 6 is a top-view structural schematic diagram of the front floor structure provided by the embodiment of the present application;

[0038] Figure 7 is a three-dimensional structural schematic diagram of the front floor structure provided by the embodiment of the present application;

[0039] Figure 8 is Figure 6 the sectional view along the line A-A of

[0040] Figure 9 for Figure 7 the enlarged view of the structure of the "M" part in

[0041] Figure 10 It is a three - dimensional structure schematic diagram of the rear floor structure provided by an embodiment of the present application;

[0042] Figure 11 It is one of the force - transmission schematic diagrams of the body floor frame structure provided by an embodiment of the present application;

[0043] Figure 12 It is the second force - transmission schematic diagram of the body floor frame structure provided by an embodiment of the present application;

[0044] Explanation of reference numerals:

[0045] 100 - body floor frame structure; 110 - front - surround cross - beam; 120 - through - beam; 130 - rear - floor rear cross - beam; 140 - rear - floor front cross - beam; 150 - front - floor front cross - beam; 160 - front - floor rear cross - beam; 111 - first diagonal tension beam; 112 - second diagonal tension beam; 113 - third diagonal tension beam; 200 - middle channel; 310 - through - longitudinal beam; 320 - rear section of the front engine - compartment longitudinal beam; 330 - upper longitudinal beam of the front floor; 340 - rear - floor longitudinal beam; 311 - front connecting plate; 312 - lower longitudinal beam of the front floor; 313 - rear connecting plate; 3121 - first beam body; 3122 - second beam body; 350 - sill beam; 400 - torque box; 500 - power battery pack; 210 - front - surround structure; 220 - front - floor structure; 230 - rear - floor structure. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts belong to the scope of protection of the present application.

[0047] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0048] In the description of the embodiments of the present application, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In addition, in the description of the present application, unless otherwise clearly defined, the cooperating components can be connected by using the conventional connection structures in the art. Moreover, the terms "installation", "connection", "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in combination with the specific circumstances.

[0050] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] Embodiment 1

[0052] The embodiment of the present application provides a body floor frame structure. As Figure 1 shown, it is a three-dimensional structure schematic diagram of the body floor frame structure. The body floor frame structure 100 includes:

[0053] a front bulkhead cross member 110, a through cross member 120, and a rear floor rear cross member 130;

[0054] through longitudinal beams 310 located on the left and right sides of the vehicle's middle channel 200, and the through longitudinal beams 310 are sequentially connected to the front bulkhead cross member 110, the through cross member 120, and the rear floor rear cross member 130;

[0055] At both ends of the front bulkhead cross member 110, first diagonal tension beams 111 are respectively formed. The first end of the first diagonal tension beam 111 is located at the connection of the front bulkhead cross member 110 and the first end of the rear section of the vehicle's front engine compartment longitudinal beam 320;

[0056] The second end of the first diagonal tension beam 111, the second end of the rear section of the front engine compartment longitudinal beam 320, and the middle channel 200 are all connected to the through cross member 120;

[0057] Wherein, the through cross member 120, the through longitudinal beams 310, the rear floor rear cross member 130, and the vehicle's sill beam 350 are combined to enclose and form the installation plane of the vehicle's power battery pack.

[0058] Specifically, the front bulkhead cross member 110, the through cross member 120, and the rear floor rear cross member 130 are arranged in parallel with each other. The through longitudinal beams 310 located on the left and right sides of the vehicle's middle channel 200 are sequentially connected to the front bulkhead cross member 110, the through cross member 120, and the rear floor rear cross member 130. And reinforcing ribs can be provided inside the front bulkhead cross member 110, the through cross member 120, the rear floor rear cross member 130, and the through longitudinal beams 310 to improve the overall structural strength.

[0059] In the embodiments of the present application, the through longitudinal beams 310 are two symmetrically arranged beams located on both the left and right sides of the middle channel 200. The number of the through longitudinal beams 310 is at least two, and the present application does not limit the number of the through longitudinal beams. Among them, as Figure 4 shown, the through longitudinal beam 310 is spliced by three sections, front and back. The through longitudinal beam 310 includes: a front connecting plate 311, a front underfloor longitudinal beam 312, and a rear connecting plate 313. Refer to Figure 1 as well. The front connecting plate 311 is located between the front surround cross beam 110 and the through cross beam 120; the front underfloor longitudinal beam 312 is located between the through cross beam 120 and the front rear floor cross beam 140 of the vehicle for installing the rear row seats; the rear connecting plate 313 is located between the front rear floor cross beam 140 and the rear rear floor cross beam 130. Specifically, each section included in the through longitudinal beam 310 is located on the same longitudinal straight line, which can ensure the inertia of the vehicle body force transmission channel during a collision and effectively ensure the reliability of force transmission.

[0060] As Figure 3 shown, it is a schematic side view structure diagram of the vehicle body floor frame structure. An installation plane for installing the power battery pack 500 is formed at the lower end of the vehicle body floor frame structure 100, which is surrounded by the combination of the through cross beam 120, the through longitudinal beam 310, the rear rear floor cross beam 130, and the vehicle sill beam 350.

[0061] In the embodiments of the present application, by setting the lower end surfaces of the through cross beam, the through longitudinal beam, the rear rear floor cross beam, and the vehicle sill beam on the same plane, and through holes corresponding to the screw holes on the power battery pack are provided on the through cross beam, the through longitudinal beam, the rear rear floor cross beam, and the sill beam. Thus, the flatness of the lower part of the vehicle body floor is ensured, and further, the installation space of the power battery pack is ensured, the battery capacity is increased, and the vehicle endurance mileage is improved.

[0062] As Figure 2 shown, it is a schematic top view structure diagram of the vehicle body floor frame structure. The vehicle body floor frame structure 100 can be divided into three parts from front to back, which are the front surround structure 210, the front floor structure 220, and the rear floor structure 230 in sequence.

[0063] Next, the front surround structure, the front floor structure, and the rear floor structure will be introduced respectively.

[0064] As Figure 5As shown in the figure, it is a three-dimensional structure schematic diagram of the front panel structure 210. At both ends of the front panel crossbeam 110, first diagonal beams 111 are respectively formed, so that a flared structure is formed at each end of the front panel crossbeam 110. The first end of the first diagonal beam 111 is located at the connection between the front panel crossbeam 110 and the first end of the rear section 320 of the front engine compartment longitudinal beam of the vehicle, and the second end is connected to the through crossbeam 120. Moreover, the through crossbeam 120 is also connected to the second end of the rear section 320 of the front engine compartment longitudinal beam and the middle channel 200. In the embodiment of the present application, by arranging the first diagonal beam 111 at the connection between the front panel crossbeam 110 and the first end of the rear section 320 of the front engine compartment longitudinal beam of the vehicle, the first diagonal beam 111 extends from the connection between the front panel crossbeam 110 and the first end of the rear section 320 of the front engine compartment longitudinal beam of the vehicle to the through crossbeam 120, and a longitudinally through through longitudinal beam 310 is arranged, so that the collision impact force from the front of the vehicle is transmitted to the front panel crossbeam 110, the first diagonal beam, the through crossbeam 120 and the through longitudinal beam 310 through the rear section 320 of the front engine compartment longitudinal beam, thereby the collision impact force from the front of the vehicle can be dispersed, and the risk of extrusion of the rear occupant compartment of the front panel crossbeam 110 and the rear power battery pack of the through crossbeam 120 can be reduced.

[0065] Specifically, a torsion box 400 is arranged between the first diagonal beam 111 of the front panel crossbeam 110 and the through crossbeam 120; wherein, a second diagonal beam 112 and a third diagonal beam 113 are formed between the torsion box 400 and the through crossbeam 120.

[0066] In the front panel structure of the embodiment of the present application, there are six diagonal beams and four longitudinal beams between the front panel crossbeam 110 and the through crossbeam 120. The six diagonal beams are respectively two first diagonal beams 111, two second diagonal beams 112 and two third diagonal beams 130, and the four longitudinal beams are respectively the left and right side beams of the two rear sections 320 of the engine compartment longitudinal beam and the middle channel 200 (that is, the front connecting plate 311 in the through longitudinal beam 310), so that 12 connection points are formed on the front panel crossbeam 110 and the through crossbeam 120, and the connection points are arranged staggeredly to form a closed-loop structure network, thereby the front collision force transmitted by the engine compartment longitudinal beam can be effectively absorbed, and the front collision force of the engine compartment longitudinal beam can be decomposed and transmitted to each direction smoothly step by step, avoiding local structural distortion and tearing caused by concentrated stress. At the same time, the strong structure network can also be used to resist the rearward movement of the tires and the parts in the engine compartment after being impacted from the front, avoiding excessive intrusion into the passenger compartment and endangering the survival and escape space of the front row occupants. At the same time, the mechanical properties of the structure network can also better provide an installation carrier for the vehicle frame and the power battery pack.

[0067] As Figure 6 and Figure 7 shown, they are respectively the top view structure schematic diagram and the three-dimensional structure schematic diagram of the front floor structure 220, and refer to Figure 1, between the through-beam 120 and the rear floor rear cross-beam 130, there is also included a front floor front cross-beam 150 and a front floor rear cross-beam 160 for installing the front row seats. Among them, the left and right ends of the front floor front cross-beam 150 and the front floor rear cross-beam 160 are respectively connected to the sill beam 350. In the longitudinal direction of the vehicle, there is also provided a front floor upper longitudinal beam 330 located above the floor for force transmission. The front floor upper longitudinal beam 330 is located between the through-beam 120 and the front floor front cross-beam 150. The first end of the front floor upper longitudinal beam 330 is connected to the second end of the rear section of the front engine compartment longitudinal beam 320. The front floor upper longitudinal beam 330 is arranged on both sides of the middle channel, being an extension of the rear section of the front engine compartment longitudinal beam 320, so that the arrangement of the two front floor upper longitudinal beams is more regular, and the stability of the overall structure can be improved.

[0068] During a frontal collision of the vehicle, the impact force can also be transmitted to the front floor upper longitudinal beam through the rear section of the front engine compartment longitudinal beam, resisting the collapse and deformation at the connection between the broken engine compartment longitudinal beam and the front floor, further dispersing the impact force of the collision impact force from the front of the vehicle, and reducing the risk of extrusion of the rear occupant compartment of the front cross-beam and the power battery pack behind the through-beam. In addition, the front floor front cross-beam and the front floor rear cross-beam are arranged at intervals front and rear, and can also resist side collisions of the vehicle.

[0069] As shown in Figure 6 to Figure 9 shown, among which, Figure 8 is Figure 6 a schematic cross-sectional view of line A-A of Figure 9 is Figure 7 a magnified view of the structure of the "M" part in . The middle channel 200 extends along the longitudinal direction of the vehicle. The middle channel 200 bulges towards the height direction of the vehicle in the middle of the width direction of the vehicle, forming a middle channel body with an arched cross-section. The front floor lower longitudinal beam 312 is located on both sides of the middle channel 200. Among them, a cavity structure is formed between the front floor lower longitudinal beam 312 and the middle channel 200, which can enhance the structural strength of the middle channel body. Specifically, the front floor lower longitudinal beam 312 includes a first beam body 3121 and a second beam body 3122. The second beam body 3122 is bent relative to the first beam body 3121, and the cross-section of the front floor lower longitudinal beam 312 is L-shaped; the front floor lower longitudinal beam 312 is arranged inside the middle channel 200, that is, on the side facing away from the convex direction. The plane where the first beam body 3121 in the front floor lower longitudinal beam 312 is located is parallel to the vehicle body floor. The second beam body 3122 is used to provide an installation point for the power battery pack. A cavity structure with a triangular cross-section is formed between the plane where the second beam body 3122 is located and the side of the middle channel 200 facing away from the convex direction. Since the triangular structure has the characteristic of high strength, the structural strength of the middle channel can be enhanced. In addition, by setting the front floor lower longitudinal beam 312 as a beam with an L-shaped cross-section, the flatness of the floor can be guaranteed, and further the installation space of the power battery pack installed under the floor can be guaranteed.

[0070] In addition, the front floor longitudinal beam 312 is located below the floor. The flanging of the beam, i.e., the cross-section is L-shaped, can increase the strength of the front floor longitudinal beam 312, and further improve the strength of the entire through longitudinal beam 310.

[0071] As Figures 6 to 7 shown, the front floor structure 220 of the embodiment of the present application includes two cross beams and six longitudinal beams, which are connected to each other to form a network structure, improving the stiffness of each beam body, enhancing its bending resistance, ensuring the structural strength and reliability of the structural framework in the front floor area, and improving the overall stability of the framework structure. Among them, the two cross beams refer to the front floor front cross beam 150 and the front floor rear cross beam 160, and the six longitudinal beams refer to two sill beams 350, two front floor lower longitudinal beams 312, and two front floor upper longitudinal beams 330. The two cross beams are located above the floor and are used for installing the front row seats and for withstanding side collisions of the vehicle. The front floor upper longitudinal beam 330 is located above the floor and belongs to a force transmission beam. Its front end is connected to the rear section of the front engine compartment longitudinal beam 320, and its rear end is connected to the front floor front cross beam 150. During a frontal collision of the vehicle, it can resist the collapse and deformation at the connection between the rear section of the front engine compartment longitudinal beam 320 and the front floor. The front floor lower longitudinal beam 312 is located below the floor, is a part of the through longitudinal beam 310, and at the same time provides an installation point for the power battery pack. The L-shaped cross-section design can form a hollow structure with a triangular cross-section with the middle channel, thereby ensuring the flatness of the lower surface of the floor and ensuring the installation space for the power battery pack.

[0072] As Figure 10 shown, it is a three-dimensional structural schematic diagram of the rear floor structure 230. The rear floor rear cross beam 130 and the sill beam 350 can be connected through the rear floor longitudinal beam 340.

[0073] In the rear floor area composed of the rear floor front cross beam 140 and the rear floor rear cross beam 130, it includes two cross beams and four longitudinal beams, which are connected to each other to form a network structure, improving the stiffness of each beam body, enhancing its bending resistance, ensuring the structural strength and reliability of the structural framework in the rear floor area, and improving the overall stability of the framework structure. Among them, the two cross beams are the rear floor front cross beam 140 and the rear floor rear cross beam 130, and the four longitudinal beams are two rear connecting plates 313 (the rear section of the through longitudinal beam 310) and two rear floor longitudinal beams 340.

[0074] As Figure 11 shown, it is a force transmission schematic diagram corresponding to the body floor frame structure of the embodiment of the present application when receiving a frontal collision force. The body floor frame structure can smoothly decompose and transmit the frontal collision force of the engine compartment longitudinal beam to each direction step by step, as Figure 12As shown in the figure, it is a force transmission schematic diagram of the body floor frame structure provided by the embodiment of the present application when subjected to a side collision force. The body floor frame structure can smoothly decompose and transmit the side collision force received by the sill beam in all directions step by step. In summary, the body floor frame structure provided by the embodiment of the present application can avoid local structural distortion and tearing caused by concentrated stress. At the same time, the strong structure network can also be used to resist the rearward movement of the tires and parts in the engine compartment after being impacted from the front, and avoid excessive intrusion into the passenger compartment, endangering the survival and escape space of the front-row occupants.

[0075] Embodiment 2

[0076] This embodiment relates to a vehicle, and the body of the vehicle is provided with the body floor frame structure in Embodiment 1.

[0077] By setting the body floor frame structure in Embodiment 1, the vehicle in this embodiment can disperse the impact force of the collision impact from the front of the vehicle, reducing the risk of extrusion of the passenger compartment behind the front bulkhead cross member and the power battery pack behind the through beam. The lower end surfaces of the through beam, the lower end surfaces of the through longitudinal beams, the lower end surface of the rear floor rear cross member, and the lower end surface of the vehicle sill beam are set in the same plane, so as to ensure the flatness of the lower part of the body floor, and further ensure the installation space of the power battery pack, improve the battery capacity, and thus achieve an increase in the overall vehicle cruising range.

[0078] The above is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A body floor frame structure, characterized in that, Comprising: A front cross beam (110), a through cross beam (120), and a rear floor rear cross beam (130); Through longitudinal beams (310) located on both left and right sides of the vehicle's middle channel (200), and the through longitudinal beams (310) are sequentially connected to the front cross beam (110), the through cross beam (120), and the rear floor rear cross beam (130); At both ends of the front cross beam (110), first diagonal tension beams (111) are respectively formed, and the first end of the first diagonal tension beam (111) is located at the connection between the front cross beam (110) and the first end of the rear section of the vehicle's front engine compartment longitudinal beam (320); The second end of the first diagonal tension beam (111), the second end of the rear section of the front engine compartment longitudinal beam (320), and the middle channel (200) are all connected to the through cross beam (120); Wherein, the through cross beam (120), the through longitudinal beams (310), the rear floor rear cross beam (130), and the vehicle's sill beam (350) are combined to enclose and form an installation plane for the vehicle's power battery pack (500).

2. The body floor frame structure according to claim 1, characterized in that The through longitudinal beam (310) includes: a front connecting plate (311), a front floor lower longitudinal beam (312), and a rear connecting plate (313); Wherein, the front connecting plate (311) is located between the front cross beam (110) and the through cross beam (120); The front floor lower longitudinal beam (312) is located between the through cross beam (120) and the front cross beam (140) of the vehicle for installing the rear row seats; The rear connecting plate (313) is located between the front cross beam (140) of the rear floor and the rear floor rear cross beam (130).

3. The body floor frame structure according to claim 2, characterized in that A cavity structure is formed between the front floor lower longitudinal beam (312) and the middle channel (200).

4. The body floor frame structure according to claim 3, characterized in that The front floor lower longitudinal beam (312) includes a first beam body (3121) and a second beam body (3122), the second beam body (3122) is bent relative to the first beam body (3121), and the cross section of the front floor lower longitudinal beam (312) is L-shaped; The cross section of the middle channel (200) is arched; The cavity structure is formed between the first beam body (3121), the second beam body (3122), and the middle channel (200).

5. The body floor frame structure according to claim 1, characterized in that The lower end surfaces of the through cross beam (120), the through longitudinal beams (310), the rear floor rear cross beam (130), and the vehicle's sill beam (350) are located on the same plane.

6. The body floor frame structure according to claim 1, characterized in that, Further comprising: A front floor upper longitudinal beam (330) located between the through cross beam (120) and the front cross beam (150) of the vehicle for installing the front row seats; The first end of the front floor longitudinal beam (330) is connected to the second end of the rear section of the front engine compartment longitudinal beam (320), and the second end of the front floor longitudinal beam (330) is connected to the front floor front cross beam (150).

7. The vehicle body floor frame structure according to claim 1, wherein Through holes corresponding to the screw holes on the power battery pack (500) are provided on the through cross beam (120), the through longitudinal beam (310), the rear floor rear cross beam (130), and the sill beam (350).

8. The vehicle body floor frame structure according to claim 1, wherein A torsion box (400) is provided between the first diagonal tension beam (111) of the front panel cross beam (110) and the through cross beam (120); Wherein, a second diagonal tension beam (112) and a third diagonal tension beam (113) are formed between the torsion box (400) and the through cross beam (120).

9. The body floor frame structure according to claim 1, characterized in that Further comprising: A rear floor longitudinal beam (340) for connecting the rear floor rear cross beam (130) and the sill beam (350).

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

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