Vehicle body structure and vehicle

Abstract

The utility model relates to the technical field of vehicles, and provides a vehicle body structure and a vehicle, the vehicle body structure comprises threshold beams arranged on the left side and the right side respectively, a front floor panel located between the threshold beams on the two sides, and a front floor lower beam body arranged on the inner side of at least one threshold beam; the front floor lower beam body is located below the front floor panel and comprises a front beam body and a rear beam body which are arranged front and back in a spaced mode. The front beam body and the rear beam body are each provided with a longitudinal part arranged in the front-back direction of the whole vehicle and a transverse part arranged in the left-right direction of the whole vehicle, and all the transverse parts are connected with the doorsill beams on the same side. According to the vehicle body structure, the transverse part in the front beam body and the transverse part in the rear beam body can be connected with the doorsill beam, a transverse force transmission channel can be formed, the corresponding capacity of a vehicle during front collision and side collision can be improved, and the collision safety of the vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a vehicle body structure. This utility model also relates to a vehicle equipped with the aforementioned vehicle body structure. Background Technology

[0002] With the rapid development of new energy vehicles, the battery pack, as a core component of pure electric vehicles and hybrid vehicles, is crucial to the overall structural design and safety of the vehicle due to its installation location and fixing method. In traditional vehicle body structures, the front floor under-mounted longitudinal beams and sill beams mainly bear the function of absorbing and transmitting the collision force in frontal and rear collisions. Therefore, the sill beams and front floor under-mounted longitudinal beams are usually designed as a through structure, while the battery pack is usually placed between the two front floor under-mounted longitudinal beams and connected to the two front floor under-mounted longitudinal beams through the two sides of the battery pack frame.

[0003] However, while the battery pack frame itself can act as a force-transmitting beam to transfer collision forces, when the front floor under-floor longitudinal beam and the battery pack frame are combined and connected, both become longitudinal force transmission channels, resulting in performance redundancy and waste in the vehicle structure's response to frontal and rear collisions. Furthermore, the front floor under-floor longitudinal beam and its connected battery pack frame cannot provide support for improving the vehicle's side-impact response performance, thus hindering the improvement of overall vehicle collision safety. Utility Model Content

[0004] In view of this, the present invention aims to propose a vehicle body structure to improve the collision safety of vehicles.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A vehicle body structure includes sill beams disposed on the left and right sides, a front floor panel located between the two sill beams, and a front floor underbeam disposed on the inner side of at least one of the sill beams.

[0007] The front floor sub-beam is located below the front floor panel and includes a front beam and a rear beam arranged at intervals.

[0008] Both the front beam and the rear beam have a longitudinal portion arranged along the front-rear direction of the vehicle and a transverse portion arranged along the left-right direction of the vehicle, and each transverse portion is connected to the sill beam on the same side.

[0009] Furthermore, battery pack mounting points are respectively provided on the front beam and the rear beam; and / or, the longitudinal portion and the transverse portion of the front beam and the rear beam are connected to form an "L" shaped structure.

[0010] Furthermore, the front beam and / or the rear beam are integrally formed.

[0011] Furthermore, the front end of the longitudinal portion of the front beam is connected to the rear section of the longitudinal beam of the front engine compartment on the same side.

[0012] Furthermore, the rear section of the front cabin longitudinal beam is integrated into a single die-cast front bulkhead structure. The front bulkhead structure is connected to the sill beams on the left and right sides, and the front beam body, the sill beam on the same side, and the front bulkhead structure are connected to form a ring structure.

[0013] Furthermore, the rear end of the longitudinal portion of the rear beam is connected to the rear floor longitudinal beam on the same side, and the rear beam, the rear floor longitudinal beam on the same side, and the sill beam are connected to form a ring structure.

[0014] Furthermore, the battery pack mounting points on the front beam and the rear beam each include a mounting base plate and a projection weld nut on the mounting base plate, and the front beam, the rear beam, and the mounting base plate are all provided with mounting through holes corresponding to the projection weld nut.

[0015] Furthermore, it also includes a seat crossbeam connecting the two side sill beams, the seat crossbeam being located above the front floor panel and including a front crossbeam and a rear crossbeam arranged at intervals; the front beam and the front crossbeam are connected in the vertical direction of the vehicle, and / or, the rear beam and the rear crossbeam are connected in the vertical direction of the vehicle.

[0016] Furthermore, cavities are formed between the front crossbeam and the rear crossbeam and the front floor panel, as well as between the front beam and the rear beam and the front floor panel.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The vehicle body structure described in this utility model, by setting a front floor under-beam including a front beam and a rear beam, ensures that both the front and rear beams contain longitudinal and transverse portions, with the transverse portion connected to the sill beam on the same side. This not only allows the longitudinal portions of the front and rear beams to form a front floor longitudinal beam structure, but also, through the connection between the transverse portion and the sill beam, establishes a structural connection between the front floor longitudinal beam structure and the sill beam. This not only improves the structural strength of the front floor area and provides transverse support for the sill beam, but also forms a transverse force transmission channel, improving the collision force transmission effect and enhancing the vehicle's ability to respond to side impacts, thus contributing to improved vehicle collision safety.

[0019] Furthermore, battery pack mounting points are located on the front and rear beams, facilitating battery pack installation and layout. The battery pack frame also forms a longitudinal force transmission structure, enhancing the vehicle's ability to withstand frontal and rear collisions. The longitudinal and transverse sections of both the front and rear beams are connected to form an L-shaped structure, which is simple, easy to design and manufacture, and convenient for placement on the front floor. The front and rear beams are integrally molded, ensuring their structural strength. The front end of the longitudinal section of the front beam connects to the rear section of the front engine compartment longitudinal beam on the same side, forming a new force transmission channel that helps disperse collision forces.

[0020] Furthermore, the rear section of the front engine compartment longitudinal beam is integrated into the one-piece die-cast front bulkhead structure, which facilitates the forming of the front engine compartment longitudinal beam. Simultaneously, the front beam connects with the sill beam on the same side and the front bulkhead structure to form a ring structure, which helps improve the structural strength of the front of the vehicle and increases the structural strength at the rear battery pack mounting point. The rear beam connects with the rear floor longitudinal beam and sill beam on the same side to form a ring structure, which helps to distribute and transmit collision forces, and also helps to increase the structural strength at the rear battery pack mounting point.

[0021] Furthermore, the projection weld nuts are mounted on the front and rear beams via a mounting base plate. This simple structure effectively connects the battery pack, ensuring reliable installation and facilitating installation. The seat crossbeams increase the lateral rigidity of the vehicle's midsection, and the connection between the front and rear beams and the crossbeams enhances the transmission and dispersion of collision forces. Additionally, cavities are formed between the front and rear crossbeams and the front floor panel, as well as between the front and rear beams and the front floor panel. These cavities on the upper and lower sides of the front floor panel together form a large cavity structure, improving energy absorption during side impacts.

[0022] Another objective of this invention is to provide a vehicle having the body structure described above.

[0023] The vehicle and / or body structure described in this utility model have the same technical effects as the prior art, and will not be described in detail here. Attached Figure Description

[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0025] Figure 1 This is a schematic diagram of the vehicle body structure described in an embodiment of the present utility model;

[0026] Figure 2This is a schematic diagram of the vehicle body structure described in this embodiment of the present invention, omitting the battery pack.

[0027] Figure 3 for Figure 2 An enlarged view of the location shown in Figure A;

[0028] Figure 4 for Figure 2 A magnified view of the location shown in B;

[0029] Figure 5 This is a schematic diagram of the annular structure consisting of the rear floor longitudinal beam, the sill beam, and the front floor lower beam as described in an embodiment of the present utility model.

[0030] Figure 6 This is a schematic diagram of the structure of the front floor underbeam as described in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the vehicle body structure described in an embodiment of the present invention from another perspective;

[0032] Figure 8 for Figure 1 A sectional view at the position indicated by CC in the middle;

[0033] Figure 9 for Figure 1 A cross-sectional view at the location shown in DD;

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Threshold beam;

[0036] 2. Front floor panel;

[0037] 3. Front floor subfloor beam; 3a. Front beam; 3b. Rear beam; 301. Longitudinal section; 302. Transverse section; 303. Mounting base plate; 304. Projection welded nuts;

[0038] 4. Rear section of the longitudinal beam in the forward engine compartment;

[0039] 5. Front structure;

[0040] 6. Rear floor longitudinal beams;

[0041] 7. Seat crossbeam; 701. Front crossbeam; 702. Rear crossbeam;

[0042] 8. Battery pack. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0045] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, in the description of this utility model, unless otherwise explicitly specified, the connecting structures between the mating components can be conventional in the art. Moreover, the terms "installation," "connection," "joining," and "connecting element" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] This embodiment relates to a vehicle body structure, which, in terms of overall structure, combines... Figure 1 and Figure 2 As shown, the vehicle body structure includes sill beams 1 on the left and right sides, a front floor panel 2 located between the two sill beams 1, and a front floor underbeam 3 disposed on the inner side of at least one of the sill beams 1.

[0050] The front floor sub-beam 3 is located below the front floor panel 2 and includes a front beam 3a and a rear beam 3b arranged at intervals. Both the front beam 3a and the rear beam 3b have a longitudinal portion 301 arranged along the front-rear direction of the vehicle and a transverse portion 302 arranged along the left-right direction of the vehicle. Each transverse portion 302 is connected to the sill beam 1 on the same side.

[0051] At this point, as described above, by setting a front floor under-beam 3 including a front beam 3a and a rear beam 3b, both the front beam 3a and the rear beam 3b include a longitudinal portion 301 and a transverse portion 302, and the transverse portion 302 is connected to the sill beam 1 on the same side. In this embodiment, the longitudinal portion 301 in the front beam 3a and the rear beam 3b forms a front floor longitudinal beam structure. At the same time, by utilizing the connection between the transverse portion 302 and the sill beam 1, this embodiment can also connect the front floor longitudinal beam structure with the sill beam 1 to establish a structural association. This not only improves the structural strength of the front floor of the vehicle body and provides transverse support for the sill beam 1, but also forms a transverse force transmission channel, improving the collision force transmission effect and the vehicle's ability to respond to side collisions, thereby achieving the effect of improving vehicle collision safety.

[0052] Based on the above overview, specifically, as a preferred embodiment, the inner side of both side sill beams 1 can be provided with a front floor underbeam 3 to ensure the symmetry of both sides of the vehicle body and to ensure the vehicle's collision safety. Of course, the front floor underbeam 3 can also be provided only on the inner side of one side sill beam 1, while the other side sill beam 1 or other conventional brackets or beam structures can be used to achieve the installation and fixation of the battery pack 8.

[0053] In addition, in this embodiment, battery pack mounting points are respectively provided on the front beam 3a and the rear beam 3b. In this way, by providing battery pack mounting points on the front beam 3a and the rear beam 3b, the installation and arrangement of the battery pack 8 can be facilitated. At the same time, the frame of the battery pack 8 itself can be used to form a longitudinal force transmission structure, thereby improving the vehicle's ability to cope with frontal and rear collisions.

[0054] like Figure 8 As shown, since the battery pack 8 is connected below the front beam 3a and the rear beam 3b, the frame of the battery pack 8, together with the front beam 3a, the rear beam 3b and the front floor panel 2 located on the same side, form a ring structure. Through the setting of this ring structure, when the vehicle is subjected to a collision along the longitudinal direction of the vehicle, that is, in the case of a frontal collision and a rear collision, the ring structure forms a new force transmission channel, which is conducive to the transmission and dispersion of the collision force.

[0055] Specifically, in this embodiment, the longitudinal portion 301 and the transverse portion 302 of both the front beam 3a and the rear beam 3b are connected to form an "L"-shaped structure. By setting the longitudinal portion 301 and the transverse portion 302 as an "L"-shaped structure, the structure of the front floor under-beam 3 is simplified, making it easier to design and manufacture, and also facilitating its placement on the front floor of the vehicle. In practical implementation, the transverse portion 302 of this embodiment is arranged perpendicular to the sill beam 1. In the event of a side collision, this improves the support effect of the transverse portion 302 on the sill beam 1 and facilitates the transmission and dispersion of collision forces.

[0056] To facilitate the processing and forming of the front floor subfloor beam 3, in this embodiment, one or both of the front beam 3a and the rear beam 3b are integrally formed. By using integrally formed front beam 3a and rear beam 3b, not only is their processing and manufacturing easier, but the structural integrity of the front floor subfloor beam 3 is also ensured, which helps to improve the structural strength of the front beam 3a and rear beam 3b themselves, thus guaranteeing the vehicle's collision safety. In specific implementation, the front beam 3a and rear beam 3b of this embodiment can be made of sheet metal and processed using integral stamping technology.

[0057] Furthermore, to enhance vehicle collision safety, the front end of the longitudinal portion 301 in the front beam 3a of this embodiment is connected to the rear section 4 of the front engine compartment longitudinal beam on the same side. The front beam 3a connects both the front engine compartment longitudinal beam and the sill beam 1, creating a new force transmission channel between them. When a collision occurs, the collision force experienced by the front engine compartment longitudinal beam can be transmitted to the sill beam 1 through the front beam 3a, facilitating the transmission of the collision force and further improving vehicle collision safety.

[0058] Based on this, such as Figure 5 As shown, in this embodiment, the rear section 4 of the front engine compartment longitudinal beam is integrated into the one-piece die-cast front bulkhead structure 5. The front bulkhead structure 5 is connected to the sill beams 1 on both sides, and the front beam 3a, the sill beam 1 on the same side, and the front bulkhead structure 5 form a ring structure. Integrating the rear section 4 of the front engine compartment longitudinal beam into the one-piece die-cast front bulkhead structure 5 facilitates the forming of the front engine compartment longitudinal beam. Simultaneously, the combination of the one-piece die-cast front bulkhead structure 5 and the front engine compartment longitudinal beam increases the rigidity of the front of the vehicle body. Furthermore, Figure 5 The arrows in the diagram indicate the direction of collision force transmission. By forming a ring support structure with the front beam 3a, sill beam 1, and front bulkhead structure 5, the collision force on the front of the vehicle can be better transmitted to the sill beam 1 through the front crossbeam and the connection between the front bulkhead structure 5 and the sill beam 1. This facilitates the transmission and dispersion of collision force, improves the vehicle's collision safety, and also helps to improve the structural strength of the battery pack mounting point, ensuring the stability of the battery pack 8 installation.

[0059] In specific implementation, the front structure 5 of this embodiment is generally an aluminum alloy die-cast structure. In addition to adopting an integral die-cast front structure 5, the front structure 5 and the rear section 4 of the front engine compartment longitudinal beam can also adopt conventional sheet metal structures.

[0060] In addition, such as Figure 3As shown, in this embodiment, the rear section 4 of the front engine compartment longitudinal beam overlaps the end of the longitudinal portion 301 of the front beam 3a, so that the longitudinal portion 301 of the front crossbeam is sandwiched between the rear end of the front engine compartment longitudinal beam and the front floor panel 2. This improves the connection strength between the rear section 4 of the front engine compartment longitudinal beam and the front beam 3a, and also improves the force transmission efficiency of the collision force between the rear section 4 of the front engine compartment longitudinal beam and the front beam 3a. Meanwhile, as... Figure 4 As shown, the rear section 4 of the forward engine compartment longitudinal beam and the longitudinal portion 301 of the forward crossbeam are provided with corresponding fixing holes. The rear section 4 of the forward engine compartment longitudinal beam and the forward crossbeam can be connected and fixed by bolts passing through the corresponding fixing holes, which can achieve a good fixing effect.

[0061] Furthermore, in this embodiment, the rear end of the longitudinal portion 301 of the rear beam 3b is connected to the rear floor longitudinal beam 6 on the same side, and the rear beam 3b, the rear floor longitudinal beam 6 on the same side, and the sill beam 1 are connected to form a ring structure. When a rear-end collision occurs, in addition to being transmitted to the front of the vehicle along the sill beam 1, the collision force can also be transmitted to the sill beam 1 through the rear crossbeam via the connection between the rear beam 3b and the rear floor longitudinal beam 6 and the sill beam 1, thus continuing to transmit and disperse the collision force to other structures of the vehicle, thereby forming a new force transmission channel, which helps to transmit and disperse the collision force and improve the collision safety of the vehicle. At the same time, the ring structure formed by the connection between the rear beam 3b, the rear floor longitudinal beam 6, and the sill beam 1 can also increase the structural strength of the rear battery mounting point and ensure the stability of the battery pack 8 installation.

[0062] In practical implementation, the end of the longitudinal portion 301 of the rear beam 3b is lapped and connected to the end of the rear floor longitudinal beam 6, which increases the connection area between the rear beam 3b and the rear floor longitudinal beam 6. At the same time, both the longitudinal portion 301 of the rear beam 3b and the rear floor longitudinal beam 6 are provided with fixing holes for bolt connection, which ensures the connection strength between the rear beam 3b and the rear floor longitudinal beam 6, and improves the force transmission efficiency between the rear beam 3b and the rear floor longitudinal beam 6.

[0063] As a specific form of implementation, such as Figure 6 As shown, the battery pack mounting points on the front beam 3a and rear beam 3b of this embodiment both include a mounting base plate 303 and a projection-welded nut 304 provided on the mounting base plate 303. The front beam 3a, rear beam 3b, and mounting base plate 303 are all provided with mounting through holes corresponding to the projection-welded nuts 304. By providing the mounting base plate 303 and projection-welded nuts 304, the structure is simple and reliable, facilitating arrangement on the front beam 3a and rear beam 3b.

[0064] Furthermore, the mounting base plate 303 increases the contact area between the projection weld nut 304 and the periphery of the mounting through hole. When the projection weld nut 304 is pulled downward by the battery pack 8 due to its connection with the battery pack 8 frame, the mounting base plate 303 provides support for the projection weld nut 304, preventing the front and rear beams 3b from being dragged and deformed by the projection weld nut 304. This avoids damage to the structure of the mounting through hole, preventing the projection weld nut 304 from coming out of the front and rear beams 3b, thereby further improving the stability of the projection weld nut 304 arrangement and ensuring the reliability of the battery pack 8 connection. At the same time, the battery pack 8 frame can be connected to the projection weld nut 304 with bolts, which has good connection strength and facilitates the installation operation of the battery pack 8.

[0065] In specific implementation, the front beam 3a and the rear beam 3b of this embodiment are each provided with two mounting base plates 303 and projection weld nuts 304 provided on the mounting base plates 303. By increasing the number of projection weld nuts 304, the connection points between the front beam 3a and the rear beam 3b and the frame of the battery pack 8 are increased, thereby further improving the connection effect between the battery pack 8 and the front floor under-beam 3.

[0066] like Figure 7 As shown, this embodiment also includes a seat crossbeam 7 connecting the two side door sill beams 1. The seat crossbeam 7 is located above the front floor panel 2 and includes a front crossbeam 701 and a rear crossbeam 702 arranged at intervals. The front beam 3a and the front crossbeam 701 are connected in the vertical direction of the vehicle, meaning their projections in the vertical direction at least partially overlap. Similarly, the rear beam 3b and the rear crossbeam 702 in this embodiment can also be connected in the vertical direction of the vehicle. In specific implementations, the front crossbeam 701 and the rear crossbeam 702 are connected to the transverse portions 302 of the front beam 3a and the rear beam 3b.

[0067] Therefore, by setting up the seat crossbeam 7, the lateral stiffness of the middle part of the vehicle body, that is, the left-right stiffness of the entire vehicle, can be increased, and a lateral force transmission channel can be added in the middle part of the vehicle body. At the same time, the connection between the front and rear beams 3b and the front and rear crossbeams 702 can make the front floor beam 3 and the seat crossbeam 7 structurally well connected, which helps to improve the strengthening effect of the vehicle body and also helps to improve the transmission and dispersion effect of collision force.

[0068] Finally, as Figure 9As shown, in this embodiment, cavities are formed between the front crossbeam 701 and the rear crossbeam 702 and the front floor panel 2, as well as between the front beam 3a and the rear beam 3b and the front floor panel 2. By forming cavities between the front and rear crossbeams 702 and the front floor panel 2, and between the front and rear beams 3b and the front floor panel 2, the structural strength of the seat crossbeam 7 and the lower front floor beam 3 can be improved by utilizing the high structural strength of the cavities. Furthermore, the cavities on the upper and lower sides of the front floor panel 2 can be combined to form a large cavity structure close to the sill beam 1. This large cavity structure provides a large crumple zone, which helps to improve the energy absorption effect during a side impact, thereby improving the safety of the vehicle collision.

[0069] In this embodiment, the front floor panel 2 has flanges on both the left and right sides connecting the two sill beams 1. These flanges can overlap the sides and bottom of the sill beams 1 to improve the connection strength between the front floor panel 2 and the sill beams 1. The edges of the front floor underbeam 3 and the seat crossbeam 7 in this embodiment also have connecting flanges to increase the connection area between them and the front floor panel 2, thereby increasing the connection strength and ensuring the integrity of the cavity structure in the event of a vehicle collision. Furthermore, the connecting flanges of the front floor underbeam 3 and the seat crossbeam 7 in this embodiment at least partially overlap in the vertical direction of the vehicle, allowing the front floor underbeam 3 and the seat crossbeam 7 to be welded together vertically, further improving the structural strength of the large cavity structure.

[0070] In summary, the vehicle body structure of this embodiment adopts the above design. By setting a front floor under-beam 3 including a front beam 3a and a rear beam 3b, both the front beam 3a and the rear beam 3b include a longitudinal portion 301 and a transverse portion 302. The transverse portion 302 is connected to the sill beam 1 on the same side. This not only allows the longitudinal portion 301 of the front beam 3a and the rear beam 3b to form a front floor longitudinal beam structure, but also, by utilizing the connection between the transverse portion 302 and the sill beam 1, the front floor longitudinal beam structure can be connected to the sill beam 1 to establish a structural relationship. This not only improves the structural strength of the front floor of the vehicle body and provides transverse support for the sill beam 1, but also forms a transverse force transmission channel, improving the collision force transmission effect and the vehicle's ability to respond to side collisions. This is beneficial to improving the safety of vehicle collisions and has good practicality.

[0071] Example 2

[0072] This embodiment relates to a vehicle having the body structure described in Embodiment 1.

[0073] In this embodiment, the vehicle body structure, through the aforementioned configuration, utilizes the front beam 3a and rear beam 3b connected to the battery pack 8 frame to form a force transmission channel along the longitudinal direction of the vehicle body. This avoids the redundant waste of collision performance that would occur with the front floor beam 3 in frontal and rear-end collisions. Simultaneously, the connection between the lateral portions 302 of the front beam 3a and rear beam 3b and the sill beam 1 provides lateral support to the sill beam 1, thus forming a lateral force transmission channel. This enhances the vehicle's ability to withstand side collisions, thereby improving its collision safety.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle body structure, characterized in that: It includes a threshold beam (1) located on the left and right sides, a front floor panel (2) located between the two threshold beams (1), and a front floor underbeam (3) located inside at least one of the threshold beams (1). The front floor beam (3) is located below the front floor panel (2) and includes a front beam (3a) and a rear beam (3b) arranged at intervals. Both the front beam (3a) and the rear beam (3b) have a longitudinal portion (301) arranged along the front-rear direction of the vehicle and a transverse portion (302) arranged along the left-right direction of the vehicle. Each transverse portion (302) is connected to the sill beam (1) on the same side.

2. The vehicle body structure according to claim 1, characterized in that: Battery pack mounting points are respectively provided on the front beam (3a) and the rear beam (3b); and / or, The longitudinal portion (301) and the transverse portion (302) of the front beam (3a) and the rear beam (3b) are connected to form an "L"-shaped structure.

3. The vehicle body structure according to claim 1, characterized in that: The front beam (3a) and / or the rear beam (3b) are integrally formed.

4. The vehicle body structure according to claim 1, characterized in that: The front end of the longitudinal portion (301) of the front beam (3a) is connected to the rear section (4) of the longitudinal beam of the front engine room on the same side.

5. The vehicle body structure according to claim 4, characterized in that: The rear section (4) of the front cabin longitudinal beam is integrated into the die-cast front structure (5). The front structure (5) is connected to the sill beams (1) on the left and right sides, and the front beam (3a) is connected to the sill beam (1) on the same side and the front structure (5) to form a ring structure.

6. The vehicle body structure according to claim 1, characterized in that: The rear end of the longitudinal portion (301) of the rear beam (3b) is connected to the rear floor longitudinal beam (6) on the same side, and the rear beam (3b) is connected to the rear floor longitudinal beam (6) and the threshold beam (1) on the same side to form a ring structure.

7. The vehicle body structure according to claim 2, characterized in that: The battery pack mounting points on the front beam (3a) and the rear beam (3b) each include a mounting base plate (303) and a projection weld nut (304) provided on the mounting base plate (303). The front beam (3a), the rear beam (3b), and the mounting base plate (303) are all provided with mounting through holes corresponding to the projection weld nut (304).

8. The vehicle body structure according to any one of claims 1 to 7, characterized in that: It also includes a seat crossbeam (7) connecting the two side threshold beams (1), the seat crossbeam (7) being located above the front floor panel (2) and including a front crossbeam (701) and a rear crossbeam (702) arranged at a distance from each other. The front beam (3a) and the front crossbeam (701) are connected in the vertical direction of the vehicle, and / or the rear beam (3b) and the rear crossbeam (702) are connected in the vertical direction of the vehicle.

9. The vehicle body structure according to claim 8, characterized in that: Cavities are formed between the front crossbeam (701) and the rear crossbeam (702) and the front floor panel (2), as well as between the front beam (3a) and the rear beam (3b) and the front floor panel (2).

10. A vehicle, characterized in that: The vehicle has the body structure as described in any one of claims 1 to 9.

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