Vehicle body structure and vehicle

Abstract

The utility model relates to the technical field of vehicles, and particularly 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 seat cross beam located above the front floor panel; the seat cross beam is of an arc-shaped structure which is gradually arched upwards from the left end and the right end to the middle in the left-right direction of the whole vehicle, the front floor panel is provided with a panel middle section located below the seat cross beam, and the panel middle section is of an arc-shaped structure which is arranged along with the shape of the seat cross beam when viewed from the front-back direction of the whole vehicle. When a vehicle is subjected to side collision, the seat cross beam can be guided to deform upwards, the situation that the deformed seat cross beam extrudes a front floor structure to invade downwards, space of a battery pack is occupied, and the battery pack is damaged can be avoided, and the safety of vehicle collision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, especially a kind of vehicle body structure and vehicle. BACKGROUND

[0002] At present, in vehicle, especially in new energy vehicle with battery pack arranged at front floor bottom, seat cross beam is generally arranged at vehicle body front floor position, and seat cross beam also generally adopts flat structure extending horizontally (i.e. left-right direction of whole vehicle).

[0003] The seat cross beam with the structure form can meet the installation needs of vehicle seat, but when vehicle collision occurs, especially side collision occurs, the force transmission path of seat cross beam on front floor is horizontal transmission, and under the horizontal extrusion of collision force, seat cross beam will be deformed. Since the deformation of seat cross beam is uncontrollable during collision, it is easy to deform downward and extrude front floor panel, and the extruded front floor panel will intrude downward together with seat cross beam.

[0004] At this time, if seat cross beam intruding downward collides with battery pack and front floor panel, it will cause problems such as stress damage of battery cell and damage of battery pack, and even cause battery pack fire in serious cases, thereby being not conducive to improving the safety of vehicle collision. SUMMARY

[0005] Therefore, the utility model aims at providing a vehicle body structure to improve the safety of vehicle collision.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A vehicle body structure includes sill beams arranged on left and right sides, a front floor panel located between the sill beams on the left and right sides, and a seat cross beam located above the front floor panel.

[0008] The seat cross beam is an arc-shaped structure gradually arched upward from left and right ends to middle part in left-right direction of whole vehicle, the front floor panel has a panel middle section located below the seat cross beam, and from front-rear direction of whole vehicle, the panel middle section is an arc-shaped structure conforming to the seat cross beam.

[0009] Further, the seat cross beam is roll-formed, and the cross section of the seat cross beam is a closed cross section with closed periphery or an open cross section with at least one side open.

[0010] Further, the seat cross beam includes a plurality of cross beam bodies connected in sequence in front-rear direction of whole vehicle, and the cross section of each cross beam body is in the shape of Chinese character "j".

[0011] Further, the seat cross beam comprises a front cross beam and a rear cross beam arranged along the front-rear direction of the vehicle;

[0012] The middle panel section comprises a front middle panel section below the front cross beam and a rear middle panel section below the rear cross beam.

[0013] Further, the front cross beam and the rear cross beam have different curvatures, and the curvature of the front middle panel section matches the front cross beam, and the curvature of the rear middle panel section matches the rear cross beam.

[0014] Further, the front floor panel comprises a front panel section on the front side of the middle panel section, and the middle of the front panel section in the left-right direction is upwardly convex to form a front middle channel section.

[0015] The front middle channel section extends along the front-rear direction of the vehicle and is located between the front wall structure and the front cross beam.

[0016] Further, the front floor panel comprises a rear panel section on the rear side of the middle panel section, and the middle of the rear panel section in the left-right direction is upwardly convex to form a rear middle channel section.

[0017] The rear middle channel section extends along the front-rear direction of the vehicle and is located between the rear cross beam and the front cross beam of the rear floor.

[0018] Further, the seat cross beam is connected to the rocker beams on both sides, and the seat cross beam and the rocker beams on both sides are connected through the connecting plates.

[0019] The vehicle body structure further comprises front floor upper longitudinal beams arranged on both left and right sides, and the front floor upper longitudinal beams on both sides extend along the front-rear direction of the vehicle, and the front floor upper longitudinal beams on both sides pass through between the connecting plates and the front floor panel on the same side respectively.

[0020] Further, the front ends of the front floor upper longitudinal beams on both sides are bifurcated and have first branch beams and second branch beams.

[0021] The front ends of the first branch beams on both sides extend to be connected to the front wall structure, and the front ends of the second branch beams on both sides gradually bend to one side of the rocker beams on the same side and are connected to the rocker beams on the same side.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] The vehicle body structure, by making the seat cross beam and the lower panel middle section be the arc-shaped structure which is arched upward, can make the collision force transmitted along the seat cross beam have the vertical upward component force in addition to the horizontal force when the vehicle collides, especially when the side collision occurs, and the vertical component force can make the extrusion deformation trend of the seat cross beam upward, guide the upward deformation of the seat cross beam, avoid the downward intrusion of the extrusion front floor structure after the deformation of the seat cross beam, occupy the battery pack space, cause the damage of the battery pack, thereby being favorable to improving the safety of the vehicle collision.

[0024] In addition, the seat cross beam is roll-formed, so that the preparation of the seat cross beam is facilitated, and the structural strength thereof is ensured.

[0025] Secondly, the radii of the front and rear cross beams are different, and the radii of the front and rear portions of the panel middle section are matched with the front and rear cross beams, respectively, which is helpful to matching the seat cross beam with the surrounding vehicle body structure arrangement, and is favorable to ensuring the setting effect of each structure in the vehicle body.

[0026] Furthermore, the middle channel rear section is formed on the panel rear section and located between the rear cross beam and the front cross beam of the rear floor, so as to play the role of the rear collision force transmission beam, which is helpful to transmitting the rear collision force to the seat cross beam and improving the transmission and dispersion effect of the collision force.

[0027] In addition, the front end of each front floor upper longitudinal beam has the first branch arm connected with the front wall structure and the second branch arm curved towards the rocker beam and connected with the rocker beam, so as to provide the longitudinal force transmission path and form the transverse force transmission path between the front floor upper longitudinal beam and the rocker beam, thereby further improving the transmission and dispersion effect of the collision force.

[0028] Another purpose of the present application is to provide a vehicle, wherein the vehicle is provided with the vehicle body structure as described above.

[0029] The vehicle of the present application has the same beneficial effects as the vehicle body structure described above compared with the prior art, and thus will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain the present application and, to provide no undue limitation on the present application. In the drawings:

[0031] Figure 1 A schematic view of the vehicle body structure according to an embodiment of the present application;

[0032] Figure 2 A schematic view of the structure of the front floor panel and the seat cross beam according to an embodiment of the present application;

[0033] Figure 3 A schematic view of the structure of the front floor panel according to an embodiment of the present application;

[0034] Figure 4 A schematic view of the structure of the front floor panel according to an embodiment of the present application; Figure 2 A sectional view of position A-A in the vehicle body structure according to an embodiment of the present application;

[0035] Figure 5 A schematic view of the structure of the seat cross beam according to an embodiment of the present application;

[0036] Figure 6 A schematic view of the structure of the seat cross beam according to an embodiment of the present application; Figure 5 A sectional view of position B-B in the vehicle body structure according to an embodiment of the present application;

[0037] Figure 7 A schematic view of the structure of the front floor upper longitudinal beam according to an embodiment of the present application;

[0038] Figure 8 A schematic view of the structure of the front floor frame according to an embodiment of the present application

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 1, rocker beam; 2, front floor panel; 3, seat cross beam; 4, front wall structure; 5, front floor front cross beam; 6, rear floor longitudinal beam; 7, front floor upper longitudinal beam; 8, front engine compartment longitudinal beam; 9, connecting plate;

[0041] 201, middle section of the panel; 201a, front part of the middle section of the panel; 201b, rear part of the middle section of the panel; 202, front section of the panel; 202a, front section of the middle channel; 203, rear section of the panel; 203a, rear section of the middle channel; 301, front cross beam; 302, rear cross beam; 3a, main body of the cross beam; 7a, first support beam; 7b, second support beam. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, specific details are set forth such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0044] In the description of the utility model, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, it is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, if the terms "first", "second" appear, they are also used for description purposes only and cannot be understood as indicating or implying relative importance.

[0045] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connector" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.

[0046] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] Embodiment one

[0048] The present embodiment relates to a vehicle body structure which is adapted to be used in a new energy vehicle model provided with a battery pack, the battery pack is specifically located at the bottom of the front floor in the vehicle body, and the vehicle body structure of the present embodiment can also improve the safety of the vehicle in the event of a collision through its structural design.

[0049] Overall structure, combined Figures 1 to 3 The vehicle body structure of the embodiment includes the rocker beams 1 arranged on the left and right sides, the front floor panel 2 arranged between the two rocker beams 1, and the seat cross beam 3 arranged above the front floor panel 2.

[0050] The seat cross beam 3 is an arc-shaped structure gradually arching upward from the left and right ends to the middle in the left-right direction of the vehicle, and the front floor panel 2 has a panel middle section 201 arranged below the seat cross beam 3, which is also an arc-shaped structure conforming to the seat cross beam 3 in the front-rear direction of the vehicle.

[0051] At this time, as arranged above, by making the seat cross beam 3 and the panel middle section 201 below it arc-shaped structures arching upward, the embodiment can make the collision force transmitted along the front floor and mainly along the seat cross beam 3 have a vertical upward component force in addition to the horizontal force when the vehicle collides, especially when it collides from the side, and the vertical component force can make the extrusion deformation trend of the seat cross beam 3 upward, guiding the seat cross beam 3 to deform upward, thereby helping to avoid the deformed seat cross beam 3 extruding the front floor structure downward to invade the battery pack space and cause damage to the battery pack, so as to improve the vehicle collision safety.

[0052] Based on the overall introduction above, specifically, it can be understood that by making the seat cross beam 3 and the panel middle section 201 below it arc-shaped structures arching upward, they can not only guide the seat cross beam 3 to deform upward when colliding, but also take advantage of the high strength of the arc-shaped structure to ensure the structural strength of the seat cross beam 3 itself, thereby helping to increase the overall rigidity of the front floor position.

[0053] In addition, it is worth noting that in the vehicle body structure of the embodiment, the rocker beams 2 arranged on the left and right sides of the front floor panel 1, and the front engine compartment longitudinal beams 8, the front floor panel longitudinal beams 5 and the rear floor longitudinal beams 6 to be mentioned below all adopt the conventional structures in the existing vehicle body, and the connection between the two rocker beams 2 and the front floor panel 1, as well as the arrangement of the front engine compartment longitudinal beams 8, the front floor panel longitudinal beams 5 and the rear floor longitudinal beams 6 in the vehicle body can also refer to the relevant arrangement in the existing vehicle body, which will not be described here.

[0054] In the embodiment, when implemented, for the seat cross beam 3 adopting the arc-shaped structure above, in order to obtain better collision response capability, the included angle between the tangent of each end of the seat cross beam 3 and the left-right direction of the vehicle can be generally set to 6°-15°, and it can be 6°, 7°, 8°, 10°, 12° or 15°, etc.

[0055] In addition, continuing to combine Figures 4 to 6As shown in the figure, as a preferred implementation form, the seat crossbeam 3 of this embodiment can be, for example, a roll-formed sheet metal part, and the cross-section of the seat crossbeam 3 is also a closed cross-section enclosed on all sides, or an open cross-section with at least one side open. At this time, by roll-forming the seat crossbeam 3 and making the cross-section of the seat crossbeam 3 a closed cross-section or an open cross-section with a side opening, it is obvious that it is convenient for the preparation of the seat crossbeam 3 and can also ensure the structural strength of the seat crossbeam 3.

[0056] In specific implementation, for the seat crossbeam 3 that is roll-formed and has a closed cross-section, its cross-sectional shape can include, for example, but is not limited to, the shape of "day" or "mu", and when the seat crossbeam 3 adopts an open cross-section, the shape of its cross-section can include, for example, but is not limited to, the shapes of "M" or "Ω".

[0057] It should be noted that in addition to the roll-forming method, as other feasible implementation forms, of course, the seat crossbeam 3 of this embodiment can also be, for example, stamping formed, or the seat crossbeam 3 of this embodiment can also adopt an extruded profile. In this way, making the seat crossbeam 3 by stamping or using an extruded profile can also facilitate the preparation of the seat crossbeam 3 and is conducive to ensuring the structural strength of the seat crossbeam 3.

[0058] However, for the seat crossbeam 3 of this embodiment, in addition to being formed by the above-mentioned roll-forming or stamping methods, or using an extruded profile. Of course, it is also feasible for the seat crossbeam 3 to be formed by other methods such as sheet metal welding, as long as the overall structure of the prepared seat crossbeam 3 is an arc structure that arches upward in the middle to be able to decompose the collision force transmitted to the seat crossbeam 3 upward.

[0059] Continue as Figure 4 As shown in the figure, in this embodiment, taking the seat crossbeam 3 with a bottom-opening roll-formed structure as an example, as a preferred implementation form, when the seat crossbeam 3 is arranged on the front floor panel 2, for example, the bottom of the seat crossbeam 3 can be snap-connected to the front floor panel 2, so that the cross-section at the position of the seat crossbeam 3 on the front floor is a closed cross-section.

[0060] The seat crossbeam It can be understood that making the seat crossbeam 3 and the front floor panel 2 form a closed cross-section can utilize the characteristic of the large structural strength of the cavity structure to better increase the structural strength at the position of the seat crossbeam 3. Based on the connection between the bottom of the seat crossbeam 3 and the front floor panel 2, preferably, in specific implementation, this embodiment can, for example, also make each position of the seat crossbeam 3 have an equal cross-section in the left-right direction of the whole vehicle. In this way, the equal cross-section of each position of the seat crossbeam 3 can also be conducive to the preparation of the seat crossbeam 3 and facilitate the connection between it and the front floor panel 2.

[0061] In this embodiment, still taking the roll forming of the seat crossbeam 3 as an example, as a preferred implementation form, in combination with Figure 5 and Figure 6 shown in, the seat crossbeam 3 may include, for example, a plurality of crossbeam bodies 3a connected in sequence in the front-rear direction of the whole vehicle, and the cross-section of each crossbeam body 3a is also in a "ji" shape. At this time, making the seat crossbeam 3 include a plurality of crossbeam bodies 3a connected in sequence, and making the cross-section of each crossbeam body 3a in a ji shape, obviously it can utilize the characteristic of the large structural strength of the ji shape structure to better ensure the structural strength of the seat crossbeam 3.

[0062] Still as Figure 1 , Figure 2 and Figure 4 shown in, preferably in this embodiment, the above-mentioned seat crossbeam 3 may include a front crossbeam 301 and a rear crossbeam 302 arranged at intervals in the front-rear direction of the whole vehicle. At the same time, the middle section 20 of the above panel may also include a front part 201a of the middle section of the panel located below the front crossbeam 301, and a rear part 201b of the middle section of the panel located below the rear crossbeam 302.

[0063] By making the seat crossbeam 3 include the front and rear crossbeams arranged at intervals, it can utilize the multiple mounting points provided by the front crossbeam 301 and the rear crossbeam 302 to facilitate the installation of the vehicle seat, and can also ensure the reliability of the installation of the vehicle seat. In specific implementation, generally, the mounting brackets fixedly connected to the top of each seat crossbeam 3 can be used for the mounting points for the installation of the vehicle seat.

[0064] On the basis that the seat crossbeam includes the front and rear crossbeams arranged at intervals, as a feasible implementation form, this embodiment may further make the arcs of the front crossbeam 301 and the rear crossbeam 302 different, and the arc of the front part 201a of the middle section of the panel is set to match the front crossbeam 301, and the arc of the rear part 201b of the middle section of the panel is set to match the rear crossbeam 302.

[0065] At this time, making the arcs of the front and rear crossbeams different, and making the arcs of the front and rear parts of the middle section of the panel match the front and rear crossbeams respectively, which helps to make the seat crossbeam 3 match the layout of the surrounding body structure, and is beneficial to ensuring the setting effect of each structure in the body. In specific implementation, generally, the arc of the front crossbeam 301 can be made smaller than that of the rear crossbeam 302, which helps to make the height of the front crossbeam 301 match the height of the front section 202a of the middle channel located in front of it.

[0066] In this embodiment, as a preferred implementation form, still as Figure 2 and Figure 3As shown, in addition to the middle section 201 of the panel, the aforementioned front floor panel 2 also includes a front section 202 of the panel located in front of the middle section 201, and the middle part of the front section 202 of the panel protrudes upward in the left-right direction to form a central channel front section 202a. The central channel front section 202a extends along the front-rear direction of the vehicle and is located between the front bulkhead structure 4 and the front crossbeam 301.

[0067] At this point, it should be noted that the aforementioned front bulkhead structure 4, located at the rear of the front engine compartment of the vehicle body, can be, for example, an integrally die-cast part, integrating the lower front bulkhead plate, the front bulkhead central channel connecting plate, and the rear sections of the torsion boxes on both sides and the front engine compartment longitudinal beams 8. The front ends of the side sill beams 1 are connected to the front bulkhead structure 4, making the front bulkhead structure 4 integrally die-cast. Obviously, compared with the conventional sheet metal welding structure, this facilitates the preparation of the lower front bulkhead structure of the vehicle body and also increases the structural strength of this part.

[0068] Furthermore, by forming a central channel front section 202a on the front section 202 of the panel, and extending this central channel front section 202a between the front bulkhead structure 4 and the front crossbeam 301, it can be understood that it not only utilizes the lower space of the central channel front section 202a to provide space for pipelines or drive shafts in the vehicle, but also allows the central channel front section 202a to act as a force transmission beam. This allows it to resist deformation of the front part of the vehicle body in a frontal collision under the support of the rear front crossbeam 201, and also helps to transmit and disperse the frontal collision force to the seat crossbeam 3, thereby improving the safety of the vehicle in a frontal collision.

[0069] Continue as Figure 2 and Figure 3 As shown in the figure, in another preferred embodiment, the front floor panel 2 of this embodiment also includes a rear panel section 203 located behind the middle section 201 of the panel, and similarly, the middle section of the rear panel section 203 in the left-right direction also protrudes upward to form a middle channel rear section 203a.

[0070] The aforementioned rear section 203a of the central channel extends along the longitudinal direction of the vehicle and is located between the rear crossbeam 302 and the front crossbeam 5 of the rear floor. By forming the rear section 203a of the central channel on the rear section 203 of the panel and extending it between the rear crossbeam 302 and the front crossbeam 5 of the rear floor, it can be understood that it can act as a rear impact force transmission beam. This helps to transfer part of the impact force at the rear floor longitudinal beam 6 to the front crossbeam 5 of the rear floor when the vehicle is involved in a rear impact, and then to the seat crossbeam 3 via the front crossbeam 5 of the rear floor, thereby improving the impact force transmission and dispersion effect.

[0071] In the embodiment, it is worth pointing out that, in specific implementation, similar to the related arrangement in the prior art front floor of the vehicle body, the seat cross beam 3 is also connected with the two side rocker beams 1, and the end of the seat cross beam 3 can be directly connected with the rocker beam 1, for example. However, as a preferred implementation form, the seat cross beam 3 is still connected with the two side rocker beams 1 through the connecting plate 9, as shown in Figure 1 and Figure 2 for example.

[0072] In this way, by connecting the seat cross beam 3 with the two side rocker beams 1 through the connecting plate 9, on the one hand, the seat cross beam 3 and the two side rocker beams 1 can be connected to form a frame structure, which not only can increase the structural strength of the front floor position, but also can increase the transverse force transmission channel at the front floor position, which is beneficial to the transmission and dispersion of the collision force when the vehicle is side-impacted. On the other hand, by using the connecting plate 4, it is obvious that compared with the direct connection of the seat cross beam 3 and the rocker beam 1, the connection operation between the two can also be facilitated in the case of integrally roll forming the seat cross beam 3.

[0073] When the connecting plate 9 is used, preferably, the two side connecting plates 9 can also be buckled and connected on the front floor panel 2 and form a cavity with the front floor panel 2. In this way, by buckling and connecting the connecting plate 9 on the front floor panel 2 and forming a cavity with the front floor panel 2, the structural strength of the connecting plate 9 position can be increased, which is helpful to increase the energy absorption capacity of the inner side position of the rocker beam 1 when the vehicle is side-impacted.

[0074] As shown in Figure 1 , as a preferred implementation form, the vehicle body structure of the embodiment further comprises front floor upper longitudinal beams 7 arranged on the left and right sides. Among them, the two side front floor upper longitudinal beams 7 extend along the front-rear direction of the whole vehicle, and each side front floor upper longitudinal beam 7 passes between the same side connecting plate 9 and the front floor panel 2.

[0075] At this time, by arranging the two side front floor upper longitudinal beams 7, as shown in Figure 8 , the embodiment can form a front floor frame structure at the front floor position of the vehicle body in cooperation with the middle channel structure formed by each seat cross beam 3 and the front and rear parts of the front floor panel 2. Therefore, by using the front floor frame structure, not only the structural strength of the front floor position, that is, the middle part of the vehicle body can be increased, and the overall torsional stiffness of the vehicle body can be improved, but also a plurality of transverse and longitudinal interlaced force transmission channels can be formed at the front floor position, which is helpful to improve the transmission effect of the collision force.

[0076] In a specific implementation, as a preferred implementation form, the front ends of the two side front floor side members 7 can each be bifurcated and have a first branch 7a and a second branch 7b. The front end of each first branch 7a extends to the front wall structure 4, and each first branch 7a can be arranged in correspondence with the upper and lower portions of the rear section of the side front engine compartment longitudinal beam 8 to form a force transmission channel between the front engine compartment longitudinal beam 8 and the front floor side member 7. The front end of each second branch 7b gradually curves toward one side of the side rocker beam 1 and is connected to the side rocker beam 1.

[0077] In this way, by providing the front end of each front floor side member 7 with a first branch 7a connected to the front wall structure 4 and a second branch 7b curved toward and connected to the side rocker beam 1, the embodiment can form a transverse force transmission path between the front floor side member 7 and the side rocker beam 1 while providing a longitudinal force transmission path through the front floor side member 7, thereby further improving the dispersion effect of the collision force.

[0078] The vehicle body structure of the embodiment is designed as above, and by providing the seat cross beam 3 with an upwardly arched structure and the front floor side member 7, the seat cross beam 3 can be guided to deform upward when the vehicle is in a collision, especially a side collision, so that the seat cross beam 3 does not press the front floor structure to intrude downward and occupy the battery pack space, causing damage to the battery pack. At the same time, the front floor frame structure can be formed in the vehicle body, which helps to increase the rigidity of the middle part of the vehicle body and improve the dispersion effect of the collision force at the front floor position, thereby improving the safety of the vehicle in a collision.

[0079] Embodiment Two

[0080] The embodiment relates to a vehicle provided with the vehicle body structure in embodiment one.

[0081] The vehicle of the embodiment can guide the seat cross beam 3 to deform upward when the vehicle is in a collision, especially a side collision, so that the seat cross beam 3 does not press the front floor structure to intrude downward and occupy the battery pack space, causing damage to the battery pack. At the same time, the front floor frame structure can be formed in the vehicle body, which helps to increase the rigidity of the middle part of the vehicle body and improve the dispersion effect of the collision force at the front floor position, thereby improving the safety of the vehicle in a collision.

[0082] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vehicle body structure, characterized in that: It includes sill beams (1) separately provided on the left and right sides, a front floor panel (2) located between the two side sill beams (1), and a seat cross member (3) located above the front floor panel (2); The seat cross member (3) is an arc-shaped structure that gradually arches upward from the left and right ends to the middle in the vehicle's left-right direction. The front floor panel (2) has a panel middle section (201) located below the seat cross member (3), and viewed from the vehicle's front-back direction, the panel middle section (201) is an arc-shaped structure conforming to the seat cross member (3).

2. The vehicle body structure according to claim 1, characterized in that: The seat cross member (3) is roll-formed, and the cross-section of the seat cross member (3) is a closed cross-section that is closed all around or an open cross-section with at least one side open.

3. The vehicle body structure according to claim 2, characterized in that: The seat cross member (3) includes a plurality of cross member main bodies connected in sequence in the vehicle's front-back direction, and the cross-section of each cross member main body is in a "U" shape.

4. The vehicle body structure according to claim 1, characterized in that: The seat cross member (3) includes a front cross member (301) and a rear cross member (302) arranged at intervals in the vehicle's front-back direction; The panel middle section (201) includes a front part (201a) of the panel middle section located below the front cross member (301), and a rear part (201b) of the panel middle section located below the rear cross member (302).

5. The vehicle body structure according to claim 4, characterized in that: The front cross member (301) and the rear cross member (302) have different curvatures; The curvature of the front part (201a) of the panel middle section is set to match the front cross member (301), and the curvature of the rear part (201b) of the panel middle section is set to match the rear cross member (302).

6. The vehicle body structure according to claim 4, characterized in that: The front floor panel (2) includes a front section (202) of the panel located in front of the panel middle section (201), and a middle channel front section (202a) is formed by the middle part of the front section (202) protruding upward in the left-right direction; The middle channel front section (202a) extends in the vehicle's front-back direction and is located between the front panel structure (4) and the front cross member (301).

7. The vehicle body structure according to claim 4, characterized in that: The front floor panel (2) includes a rear section (203) of the panel located behind the panel middle section (201), and a middle channel rear section (203a) is formed by the middle part of the rear section (203) protruding upward in the left-right direction; The middle channel rear section (2 ​ ​ The vehicle body structure further comprises front floor longitudinal beams (7) arranged on left and right sides, the front floor longitudinal beams (7) on the left and right sides each extend along the front-rear direction of the vehicle, and each of the front floor longitudinal beams (7) on the left and right sides passes through between the connecting plate (9) and the front floor panel (2) on the same side.

9. The vehicle body structure according to claim 8, characterized in that: The front ends of the front floor longitudinal beams (7) on the left and right sides are bifurcated and have first branch beams (7a) and second branch beams (7b); The front ends of the first branch beams (7a) on the left and right sides each extend to be connected with the front wall structure (4), and the front ends of the second branch beams (7b) on the left and right sides gradually bend toward one side of the rocker beam (1) on the same side and are connected with the rocker beam (1) on the same side.

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

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