Vehicle body structure and vehicle

Abstract

A vehicle body structure, comprising a first force transmission structure (10), the first force transmission structure (10) comprising a front wall connecting member (11), a cross car beam (15), a pair of shock absorber bases (12), a pair of connecting structures (13), and a pair of A pillars (14). Two ends of the front wall connecting member (11) are connected to the pair of shock absorber bases (12), respectively. Two ends of the cross car beam (15) are connected to the pair of A pillars (14), respectively. Two ends of one of the connecting structures (13) are connected to one of the A pillars (14) and one of the shock absorber bases (12), respectively, and two ends of the other connecting structure (13) are connected to the other A pillar (14) and the other shock absorber base (12), respectively. Further provided is a vehicle. The front wall connecting member is arranged between the pair of shock absorber bases, so that the torsional rigidity of a front portion of a vehicle body is improved. Furthermore, the connecting structures are arranged to connect the shock absorber bases to the A pillars, so that the front wall connecting member, the cross car beam, and the connecting structures jointly form a quadrilateral structure, and collision force from the front part of the vehicle body is effectively transmitted and split up, improving the vehicle collision safety performance.

Description

Body structure and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311272229.6, filed on September 28, 2023, the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to, but is not limited to, the field of vehicle technology, and in particular to a vehicle body structure and a vehicle. Background Art

[0004] At present, with the development of the vehicle industry, people's requirements for the performance of vehicle safety facilities are constantly increasing, and users are paying more and more attention to the safety performance of vehicles when purchasing vehicles.

[0005] Summary of the Invention

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0007] The present application provides a vehicle body structure and a vehicle, which can improve the collision safety performance of the vehicle.

[0008] The present application discloses a vehicle body structure, including a first force transmission structure, which includes a front panel connector, an instrument cross beam, a pair of shock absorber seats, a pair of connecting structures and a pair of A-pillars; the two ends of the front panel connector are respectively connected to the pair of shock absorber seats; the two ends of the instrument cross beam are respectively connected to the pair of A-pillars; the two ends of one of the connecting structures are respectively connected to one of the A-pillars and one of the shock absorber seats, and the two ends of the other connecting structure are respectively connected to the other A-pillar and the other shock absorber seat.

[0009] Optionally, each of the connecting structures includes a first force transmitting member and a second force transmitting member connected together, the first force transmitting member is connected to the front side of the corresponding A-pillar, and the second force transmitting member is connected to the inner side of the corresponding A-pillar.

[0010] Optionally, the front dash connecting member includes a front dash upper cross beam, a front guard plate and a connecting plate, the front dash upper cross beam is fixed to the front guard plate, and the connecting plate connects the pair of shock absorber seats and the front dash upper cross beam.

[0011] Optionally, along the vehicle body height direction, the position of the instrument cross beam is higher than the position of the front wall connecting piece.

[0012] Optionally, along the width direction of the vehicle body, the length of the instrument cross beam is greater than the length of the front wall connecting piece.

[0013] Optionally, the vehicle body structure also includes a second force transmission structure, which includes a front lower cross beam, a pair of first diagonal bracing beams, a pair of door sill beams and a pair of front longitudinal beams, wherein the front lower cross beam is located at the bottom of the vehicle body; the pair of front longitudinal beams are respectively connected to the two ends of the front lower cross beam; the two ends of one of the first diagonal bracing beams are respectively connected to one of the door sill beams and one end of the front lower cross beam, and the two ends of another first diagonal bracing beam are respectively connected to the other door sill beam and the other end of the front lower cross beam.

[0014] Optionally, the second force transmission structure further includes a center longitudinal beam, one end of which is connected to the middle portion of the front lower cross beam, and the other end of which extends toward the rear of the vehicle body.

[0015] Optionally, the second force transmission structure also includes at least one pair of second diagonal bracing beams, wherein the two ends of one of the second diagonal bracing beams are respectively connected to one of the first diagonal bracing beams and the middle longitudinal beam, and the two ends of another second diagonal bracing beam paired with the one second diagonal bracing beam are respectively connected to the other first diagonal bracing beam and the middle longitudinal beam.

[0016] Optionally, the vehicle body structure further includes a third force transmission structure, which includes a central channel. The central channel extends along the length direction of the vehicle body and is connected to the center longitudinal beam.

[0017] Optionally, the third force transmission structure also includes a front floor and a battery pack, the central channel is arranged on the front floor, at least a portion of the battery pack is arranged below the front floor, the left and right sides of the battery pack are respectively connected to the pair of door sill beams, and the front side of the battery pack is connected to the front floor.

[0018] Optionally, the third force transmission structure further includes a battery pack longitudinal beam, which is arranged along the length direction of the vehicle body and passes through the middle of the battery pack. The battery pack longitudinal beam is integrated with the battery pack and is connected to the central channel.

[0019] Optionally, the central channel is spot-welded to the center longitudinal beam, and the battery pack longitudinal beam is bolted to the central channel.

[0020] Optionally, the pair of connecting structures are spot-welded to the pair of shock absorber seats respectively, the pair of connecting structures are spot-welded to the pair of A-pillars respectively, and the front wall connecting piece is spot-welded to the pair of shock absorber seats.

[0021] The present application also discloses a vehicle, comprising the vehicle body structure as described above.

[0022] The vehicle body structure of this application improves the front torsional rigidity of the vehicle body by providing a front dash connector between a pair of shock absorber mounts. A connecting structure is also provided to connect the shock absorber mounts to the A-pillars. The front dash connector, instrument crossbeam, and connecting structure together form a quadrilateral structure, effectively transmitting and decomposing collision forces from the front of the vehicle body, thereby improving the vehicle's collision safety performance.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present invention. Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0025] FIG1 is a perspective view of the vehicle body structure of the present application.

[0026] FIG2 is a perspective view of the first force transmission structure in FIG1 , and the direction of the arrow is the transmission direction of the collision force.

[0027] FIG3 is a partial stereoscopic view of the first force transmission structure in FIG2 , in which the instrument cross beam is not shown.

[0028] FIG4 is a three-dimensional view of the first force transmission structure in FIG3 from another perspective.

[0029] FIG5 is a perspective view of the second force transmission structure in FIG1 , and the direction of the arrow is the transmission direction of the collision force.

[0030] FIG6 is an exploded view of the third force transmission structure in FIG1 , wherein the front floor is not shown.

[0031] Description of reference numerals:

[0032] 10. First force transmission structure; 11. Front panel connecting member; 111. Front panel upper cross member; 112. Front guard plate; 113. Connecting plate; 12. Shock absorber seat; 121. First connecting edge; 122. Second connecting edge; 123. Third connecting edge; 13. Connecting structure; 131. First force transmission member; 132. Second force transmission member; 133. Third force transmission member; 14. A-pillar; 15. Instrument cross member; 20. Second force transmission structure; 21. Front longitudinal member; 22. Front panel lower cross member; 23. First diagonal bracing beam; 24. Door sill beam; 25. Middle longitudinal beam; 26. Second diagonal bracing beam; 30. Third force transmission structure; 31. Front floor; 311. Central channel; 32. Battery pack; 321. Battery pack longitudinal beam; 41. Side panel. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of this specification, as detailed in the appended claims.

[0034] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this specification. As used in this specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information without departing from the scope of this specification. Depending on the context, the term "if" as used herein may be interpreted as "when," "when," or "in response to determining."

[0036] When some vehicles in the related technology are subjected to a collision (especially a head-on collision), the collision energy between the various structures of the front engine compartment is not properly dispersed, thereby affecting the absorption and transmission of the collision energy by the body structure. The collision safety performance of the body structure is low, resulting in deformation of the passenger compartment, posing a major safety hazard.

[0037] In view of this, the present application provides a vehicle body structure and a vehicle, which can improve the collision safety performance of the vehicle.

[0038] Next, the embodiments of this specification are described in detail.

[0039] In this application, along the length direction of the vehicle body, the vehicle's forward direction is defined as forward, and the vehicle's backward direction is defined as backward; along the width direction of the vehicle body, the side close to the passenger compartment is defined as inner, and the side close to the outside of the vehicle is defined as outer.

[0040] As shown in FIG1 , the vehicle body structure provided in the present application includes a first force transmission structure 10 located in the front engine compartment of the vehicle body, a second force transmission structure 20 and a third force transmission structure 30 located at the bottom of the vehicle body.

[0041] Referring to Figures 2 to 4 , the first force transmission structure 10 includes a dash connector 11, a car cross beam (CCB) 15, at least one pair of shock absorber mounts 12, at least one pair of connecting structures 13, and at least one pair of A-pillars 14. The dash connector 11 has two ends connected to the shock absorber mounts 12. The CCB 15 has two ends connected to the A-pillars 14. One connecting structure 13 has two ends connected to one of the A-pillars 14 and one of the shock absorber mounts 12, while another connecting structure 13 has two ends connected to the other A-pillar 14 and the other shock absorber mount 12.

[0042] The front dash connector 11 includes a front dash upper cross member 111, a front fender 112, and a connecting plate 113. The front dash upper cross member 111 and the connecting plate 113 are both fixed to the front fender 112. Specifically, the front dash upper cross member 111 and the connecting plate 113 are both fixed above the front fender 112. The shock absorber seat 12 is connected to the front dash upper cross member 111 via the connecting plate 113. By providing the front dash connector 11, the shock absorber seats 12 on both sides are connected, thereby improving the torsional rigidity of the front vehicle body and enhancing the connection strength of the upper structure in the front engine compartment. In some cases, during an impact, the connecting plate 113 may collapse to a certain extent, thereby effectively absorbing the impact force and reducing the impact energy.

[0043] In this embodiment, the shock absorber mounts 12 are front shock absorber mounts, and a pair of them are located on the left and right sides of the front engine compartment of the vehicle body. The shock absorber mounts 12 include a first connecting edge 121, a second connecting edge 122, and a third connecting edge 123. The first connecting edge 121 is located on the side of the shock absorber mount 12 near the front connector 11 and is connected to the connecting plate 113. The second connecting edge 122 is located on the side opposite the first connecting edge 121 and is connected to the side panel 41 of the vehicle body. The third connecting edge 123 is located at the rear side of the shock absorber mount 12.

[0044] The front end of the connecting structure 13 is connected to the shock absorber seat 12, and the rear end is connected to the A-pillar 14. The connecting structure 13 can be connected to the third connecting edge 123 of the shock absorber seat 12, the second connecting edge 122 of the shock absorber seat 12, or both the third connecting edge 123 and the second connecting edge 122. The connecting structure 13 includes a first force transmission member 131 and a second force transmission member 132 connected together. The front portion of the first force transmission member 131 is connected to the front portion of the second force transmission member 132. It will be understood that in this embodiment, there are two connecting structures 13.

[0045] In some cases, a portion of the connection structure 13 may also be connected to the dash connector 11 to better transmit and disperse the impact force. As shown in Figures 3 and 4 , the connection structure 13 also includes a third force transmission member 133. This third force transmission member 133 is positioned along the width of the vehicle body and connects both the second force transmission member 132 and the dash connector 11. The third force transmission member 133 can also be considered part of the dash connector 11.

[0046] The first force transmission member 131 is connected to the front side of the A-pillar 14. Specifically, the first force transmission member 131 is located on a relatively outer side, and its end close to the rear side of the vehicle body is connected to the front side of the A-pillar 14. The second force transmission member 132 is connected to the inner side of the A-pillar 14. In this way, the impact force can be transmitted to the A-pillar 14 respectively through the first force transmission member 131 and the second force transmission member 132, thereby increasing the force transmission path and better dispersing the impact force. The setting of the connecting structure 13 can, on the one hand, improve the torsional stiffness of the front engine compartment structure, and on the other hand, can also improve the bending stiffness of the front engine compartment structure in the length direction of the vehicle body, thereby making the collision area of ​​the vehicle body more stable and enhancing the protection of the vehicle body.

[0047] The instrument cross member 15 is connected at both ends to a pair of A-pillars 14. The height of the second force transmission member 132 at its connection to the A-pillars 14 is approximately equal to that of the instrument cross member 15. Thus, as indicated by the arrows in Figure 2, the dash connector 11, instrument cross member 15, and two connecting structures 13 together form a quadrilateral closed loop. The pair of shock absorber mounts 12 are located at two adjacent vertices of the quadrilateral, and the pair of A-pillars 14 are located at the other two vertices of the quadrilateral.

[0048] Specifically, in this embodiment, the instrument cross beam 15 is positioned higher than the dash connector 11 along the vehicle body height. Along the vehicle body width, the instrument cross beam 15 is longer than the dash connector 11. Therefore, the height of the connecting structure 13 gradually increases from front to back, and the connecting structure 13 gradually tilts outward. The dash connector 11, instrument cross beam 15, and the two connecting structures 13 together form a trapezoidal closed-loop structure that is narrow in front and wide in the back. In some cases, due to variations in vehicle body design, the length of the instrument cross beam 15 may equal or be less than the length of the dash connector 11.

[0049] Specifically, the connecting structure 13 is spot-welded to the shock absorber mount 12, the connecting structure 13 is spot-welded to the A-pillar 14, and the dash connector 11 is spot-welded to the shock absorber mount 12. Compared to traditional welding methods, spot welding is faster and produces smooth weld surfaces, eliminating the need for additional polishing. This improves vehicle aesthetics and assembly efficiency. Furthermore, the welds are of stable quality, meeting design strength requirements, and require no additional welding materials, resulting in a low cost.

[0050] When the vehicle is subjected to a head-on collision, the impact force from the front of the vehicle body is transmitted by the front dash connector 11 to the connecting structures 13 on both sides. This is then dispersed through the connecting structures 13 to the instrument cross member 15, achieving an integrated transmission path and further enhancing the stability of the vehicle body in the collision zone. Notably, during the transmission of the collision force, the instrument cross member 15 provides strong support for the lower portion of the A-pillar 14. Therefore, a large portion of the impact force from the upper part of the vehicle body is dispersed to the instrument cross member 15, leaving only a small amount of force transmitted through the upper side member above the A-pillar 14. This ensures that the upper side member of the A-pillar 14 does not bend or even deform during the collision, meeting the intrusion tolerance requirements and further improving safety performance.

[0051] As shown in Figures 1 and 5, the vehicle body structure of the present application also includes a second force transmission structure 20 located at the bottom of the vehicle body. The second force transmission structure 20 includes a front lower cross member 22, at least a pair of first diagonal bracing beams 23, at least a pair of door sill beams 24, and at least a pair of front longitudinal beams 21. The front lower cross member 22 is located at the bottom of the vehicle body. The front lower cross member 22 is arranged along the width direction of the vehicle body. A pair of front longitudinal beams 21 are respectively connected to the two ends of the front lower cross member 22 and extend forward along the length direction of the vehicle body. A pair of door sill beams 24 are respectively arranged on both sides of the vehicle body and extend toward the rear of the vehicle body. The two ends of one of the first diagonal bracing beams 23 are respectively connected to one of the door sill beams 24 and one end of the front lower cross member 22, and the two ends of the other first diagonal bracing beam 23 are respectively connected to the other door sill beam 24 and the other end of the front lower cross member 22.

[0052] When the vehicle collides, the front longitudinal beam 21 located at the front of the vehicle is hit first, and the impact force can be transmitted to the front lower cross beam 22. The front lower cross beam 22 is connected to the door sill beam 24 through the first diagonal support beam 23, and the impact force is transmitted to the door sill beams 24 on the left and right sides, realizing the transmission and dispersion of the impact force, avoiding excessive concentration of the impact force, thereby ensuring the integrity of the passenger compartment structure during the vehicle collision and reducing the damage to the occupants.

[0053] The second force transmission structure 20 also includes a center longitudinal beam 25 and at least one pair of second diagonal bracing beams 26. One end of the center longitudinal beam 25 is connected to the center portion of the dash lower cross member 22, and the other end extends toward the rear of the vehicle body. One of the second diagonal bracing beams 26 has its ends connected to one of the first diagonal bracing beams 23 and the center longitudinal beam 25, respectively. Another second diagonal bracing beam 26 has its ends connected to another first diagonal bracing beam 23 and the center longitudinal beam 25, respectively. In other cases, the ends of the second diagonal bracing beams 26 may also be connected to the dash lower cross member 22 and the center longitudinal beam 25, respectively.

[0054] Specifically, the second diagonal bracing beam 26 is connected to the first diagonal bracing beam 23 on the side of the first diagonal bracing beam 23 closest to the front lower cross member 22. The second diagonal bracing beam 26 is connected to the center longitudinal beam 25 on the side of the center longitudinal beam 25 away from the front lower cross member 22. The second diagonal bracing beam 26 can be arranged at an angle to the center longitudinal beam 25. In this embodiment, the angle formed by the second diagonal bracing beam 26 and the center longitudinal beam 25 is an acute angle. The front lower cross member 22, the second diagonal bracing beam 26, and the center longitudinal beam 25 together form a triangular structure.

[0055] It is understood that the front panel lower cross member 22, the middle longitudinal member 25, and the second diagonal bracing beams 26 on both sides can form two small triangles, and the front panel lower cross member 22 and the second diagonal bracing beams 26 on both sides can also form a large triangle structure composed of the above two small triangles. By forming multiple triangular structures, the structural strength can be further improved and the force transmission path can be increased.

[0056] When the vehicle is hit head-on, the impact force is transferred from the front longitudinal beam 21 at the front of the vehicle to the dash lower cross member 22. The dash lower cross member 22 further distributes the impact force to the second diagonal bracing beam 26 and the center longitudinal beam 25. The triangular structure formed by the dash lower cross member 22, the second diagonal bracing beam 26, and the center longitudinal beam 25 absorbs the impact force, making the vehicle body structure more stable.

[0057] The setting of the second force transmission structure 20 can transmit the impact force from the front longitudinal beam 21 to the rocker beam 24 and the middle longitudinal beam 25 respectively, further improving the multi-path transmission and dispersion of the collision force, ensuring the integrity of the passenger compartment structure, and reducing the damage to the occupants in the vehicle during a collision.

[0058] As shown in Figures 1 and 6 , the vehicle body structure also includes a third force transmission structure 30. This structure comprises a front floor 31 and a central channel 311 disposed on the front floor 31. The front floor 31 is located at the bottom of the vehicle body. The central channel 311 extends along the length of the vehicle body and is connected to the center longitudinal beam 25. This channel transmits and distributes the impact force from the second force transmission structure 20 to the third force transmission structure 30. Specifically, the central channel 311 is spot-welded to the center longitudinal beam 25.

[0059] The third force transmission structure 30 also includes a battery pack 32 and a battery pack longitudinal beam 321. At least a portion of the battery pack 32 is disposed below the front floor 31. The left and right sides of the battery pack 32 are respectively connected to a pair of door sill beams 24, and the front side of the battery pack 32 is connected to the front floor 31. In some cases, the battery pack 32 may also extend rearward to below the rear floor (not shown in the figure). The battery pack longitudinal beam 321 is disposed along the length direction of the vehicle body and passes through the middle of the battery pack 32. The battery pack longitudinal beam 321 is integrated with the battery pack 32, and the battery pack longitudinal beam 321 is connected to the central channel 311, for example, by bolts.

[0060] The third force transmission structure 30 connects the central tunnel 311 with the battery pack longitudinal beams 321, thereby integrating the front floor 31 and the battery pack 32. Furthermore, the connection between the central tunnel 311 and the center longitudinal beams 25 forms a unified collision path for the lower body of the vehicle, effectively transmitting and dispersing collision forces while ensuring a lightweight vehicle body system, thereby enhancing vehicle collision safety.

[0061] The vehicle body structure of the present application improves the torsional rigidity of the front portion of the vehicle body by providing a front dash connector 11 between a pair of shock absorber mounts 12. A connecting structure 13 is also provided to connect the shock absorber mounts 12 to the A-pillars 14. The front dash connector 11, the instrument cross member 15, and the connecting structure 13 together form a quadrilateral structure, effectively transmitting and decomposing collision forces from the front of the vehicle body, thereby improving the vehicle's collision safety performance.

[0062] The vehicle body structure of the present application rationally plans the collision path. When the vehicle is hit, the first force transmission structure 10, the second force transmission structure 20 and the third force transmission structure 30 work together to transmit and decompose the collision force. Especially when applied to vehicles without B-pillars, the vehicle body structure of the present application allows most of the collision force to be transmitted from the lower part of the vehicle body, and less force is transmitted through the upper side beam of the A-pillar 14, ensuring that the upper side beam of the A-pillar 14 does not bend or even deform during the collision, meeting the intrusion volume requirements. As a result, the B-pillar-free vehicle body can well meet the five-star collision requirements of the frontal safety collision NCAP (New Car Assessment Program) and the CIASI (China Insurance Automotive Safety Index) crash resistance performance, especially the property requirements of small offset collisions.

[0063] The present application also provides a vehicle, comprising the vehicle body structure described above. For example, the vehicle may be a new energy vehicle.

[0064] The above descriptions are only some embodiments of the present application and do not constitute any formal limitation to the present application. Although the present application has been disclosed in some embodiments as above, they are not intended to limit the present application. Any technician familiar with the art can make some changes or modifications to equivalent embodiments of the above-disclosed technical contents without departing from the scope of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the present application are still within the scope of the present application.

Claims

1. A vehicle body structure, comprising a first force transmission structure (10), wherein the first force transmission structure (10) comprises a front wall connecting member (11), an instrument cross beam (15), a pair of shock absorber seats (12), a pair of connection structures (13) and a pair of A-pillars (14); Both ends of the front enclosure connecting member (11) are respectively connected to the pair of shock absorber seats (12); The two ends of the instrument cross beam (15) are respectively connected to the pair of A-pillars (14); The two ends of one connection structure (13) are respectively connected to one A-pillar (14) and one shock absorber seat (12), and the two ends of another connection structure (13) are respectively connected to another A-pillar (14) and another shock absorber seat (12).

2. The vehicle body structure according to claim 1, wherein: Each of the connection structures (13) comprises a first force transmission member (131) and a second force transmission member (132) connected together, wherein the first force transmission member (131) is connected to the front side of the corresponding A-pillar (14), and the second force transmission member (132) is connected to the inner side of the corresponding A-pillar (14).

3. The vehicle body structure according to claim 1 or 2, wherein: The front wall connecting member (11) comprises a front wall upper cross beam (111), a front guard plate (112) and a connecting plate (113). The front enclosure upper cross beam (111) is fixed to the front guard plate (112), The connecting plate (113) connects the pair of shock absorber seats (12) and the front enclosure upper cross beam (111).

4. The vehicle body structure according to any one of claims 1 to 3, wherein: Along the vehicle body height direction, the position of the instrument cross beam (15) is higher than the position of the front enclosure connecting member (11).

5. The vehicle body structure according to any one of claims 1 to 4, wherein: Along the width direction of the vehicle body, the length of the instrument cross beam (15) is greater than the length of the front enclosure connecting piece (11).

6. The vehicle body structure according to any one of claims 1 to 5, further comprising a second force transmission structure (20), wherein the second force transmission structure (20) comprises a front wall lower cross beam (22), a pair of first diagonal bracing beams (23), a pair of door sill beams (24) and a pair of front longitudinal beams (21), The front lower cross beam (22) is located at the bottom of the vehicle body; The pair of front longitudinal beams (21) are respectively connected to two ends of the front enclosure lower cross beam (22); The two ends of one of the first diagonal bracing beams are respectively connected to one of the sill beams and one end of the front panel lower cross beam, and the two ends of another of the first diagonal bracing beams are respectively connected to the other end of the other sill beam and the front panel lower cross beam.

7. The vehicle body structure according to claim 6, wherein: The second force transmission structure (20) further comprises a middle longitudinal beam (25), one end of which is connected to the middle portion of the front enclosure lower cross beam (22), and the other end of which extends toward the rear of the vehicle body.

8. The vehicle body structure according to claim 7, wherein: The second force transmission structure (20) further comprises at least one pair of second diagonal bracing beams (26), wherein two ends of one second diagonal bracing beam (26) are respectively connected to one first diagonal bracing beam (23) and the middle longitudinal beam (25), and two ends of another second diagonal bracing beam (26) paired with the one second diagonal bracing beam are respectively connected to another first diagonal bracing beam (23) and the middle longitudinal beam (25).

9. The vehicle body structure according to claim 7 or 8, further comprising a third force transmission structure (30), wherein the third force transmission structure (30) comprises a central channel (311), wherein the central channel (311) extends along the length direction of the vehicle body, and wherein the central channel (311) is connected to the center longitudinal beam (25).

10. The vehicle body structure according to claim 9, wherein: The third force transmission structure (30) further includes a front floor (31) and a battery pack (32). The central channel (311) is arranged on the front floor (31), At least a portion of the battery pack (32) is disposed below the front floor (31), the left and right sides of the battery pack (32) are respectively connected to the pair of door sill beams (24), and the front side of the battery pack (32) is connected to the front floor (31).

11. The vehicle body structure according to claim 10, wherein: The third force transmission structure (30) further comprises a battery pack longitudinal beam (321), wherein the battery pack longitudinal beam (321) is arranged along the length direction of the vehicle body and passes through the middle of the battery pack (32), the battery pack longitudinal beam (321) and the battery pack (32) are integrated into one body, and the battery pack longitudinal beam (321) is connected to the central channel (311).

12. The vehicle body structure according to claim 11, wherein: The central channel (311) is spot-welded to the middle longitudinal beam (25), and the battery pack longitudinal beam (321) is bolted to the central channel (311).

13. The vehicle body structure according to any one of claims 1 to 12, wherein: The pair of connection structures (13) are respectively connected to the pair of shock absorber seats (12) by spot welding, the pair of connection structures (13) are respectively connected to the pair of A-pillars (14) by spot welding, and the front enclosure connection piece (11) is connected to the pair of shock absorber seats (12) by spot welding.

14. A vehicle comprising the vehicle body structure according to any one of claims 1 to 13.

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