Vehicle body frame structure and vehicle

Abstract

The invention discloses a vehicle body frame structure and a vehicle. The vehicle body frame structure comprises two front longitudinal beams arranged in the width direction of the vehicle in a spaced mode; the two ends of the front cross beam are connected with the two front longitudinal beams respectively; the two ends of the dash panel lower cross beam are connected with the two front longitudinal beams respectively, the dash panel lower cross beam is connected with the front cross beam, and the dash panel lower cross beam is arranged on the side, facing the tail of a vehicle body, of the front cross beam. According to the vehicle body frame structure, the middle force transmission structure of the vehicle body frame structure is formed by the front cross beam and the dash panel lower cross beam, collision force is effectively transmitted to the rear portion of the vehicle, the middle force transmission path of the vehicle body is increased, and the collision performance of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and more specifically, to a body frame structure and a vehicle. Background Art

[0002] The existing body frame structure has a weak collision resistance and a relatively single force transmission path, which affects the collision force transmission effect and the deformation energy absorption ability of the body frame structure. Summary of the Invention

[0003] An object of the present invention is to provide a new technical solution for a body frame structure and a vehicle, which can at least solve the problems of weak collision ability and single force transmission path in the existing body frame structure.

[0004] In a first aspect of the present invention, there is provided a body frame structure, including: two front longitudinal beams spaced apart in the vehicle width direction; a front cross beam, with both ends of the front cross beam respectively connected to the two front longitudinal beams; a lower front bulkhead cross beam, with both ends of the lower front bulkhead cross beam respectively connected to the two front longitudinal beams, the lower front bulkhead cross beam being connected to the front cross beam, and the lower front bulkhead cross beam being arranged on a side of the front cross beam facing the vehicle tail.

[0005] Optionally, at least part of the front cross beam is located above at least part of the lower front bulkhead cross beam.

[0006] Optionally, the front cross beam is an integrally formed structure; and / or; the lower front bulkhead cross beam is an integrally formed structure.

[0007] Optionally, the body frame structure further includes a central tunnel, and the central tunnel is connected to the lower front bulkhead cross beam.

[0008] Optionally, the projection of the lower front bulkhead cross beam in the vehicle height direction at least partially overlaps with the projection of the central tunnel in the vehicle height direction.

[0009] Optionally, on the side of the lower front bulkhead cross beam away from the central tunnel in the vehicle height direction, there is a plane for connecting a battery pack.

[0010] Optionally, the front cross beam is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity; and / or; the lower front bulkhead cross beam is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity.

[0011] Optionally, the vehicle body frame structure further includes: a rear casting of the front longitudinal beam; a rear brace of the front longitudinal beam, the rear casting of the front longitudinal beam being connected to the rear brace of the front longitudinal beam; in the longitudinal direction of the vehicle, at least a part of the front longitudinal beam is located on the front side of the rear casting of the front longitudinal beam and the rear brace of the front longitudinal beam, and the front longitudinal beam is respectively connected to the rear casting of the front longitudinal beam and the rear brace of the front longitudinal beam.

[0012] Optionally, the rear casting of the front longitudinal beam is connected to the rear brace of the front longitudinal beam; the rear brace of the front longitudinal beam is connected to the front cross beam, and a part of the rear casting of the front longitudinal beam extends away from the front cross beam.

[0013] Optionally, the rear casting of the front longitudinal beam is connected to the lower cross beam of the front panel.

[0014] Optionally, in the longitudinal direction of the vehicle, the rear casting of the front longitudinal beam extends backward to the rear side of the lower cross beam of the front panel.

[0015] Optionally, the projection of the rear casting of the front longitudinal beam in the vehicle width direction at least partially overlaps with the projection of the rear brace of the front longitudinal beam in the vehicle width direction.

[0016] Optionally, the rear casting of the front longitudinal beam is an integrally formed structure; and / or, the rear brace of the front longitudinal beam is an integrally formed structure.

[0017] Optionally, the vehicle body frame structure further includes: a sill, the sill being connected to the sill connection part of the rear casting of the front longitudinal beam.

[0018] Optionally, the front side of the sill is connected to the rear casting of the front longitudinal beam, extends toward the side surface of the lower cross beam of the front panel, and is connected to the rear casting of the front longitudinal beam.

[0019] Optionally, the sill connection part is provided with a sill beam receiving cavity, and at least a part of the sill beam is arranged in the sill beam receiving cavity.

[0020] Optionally, the vehicle body frame structure further includes a reinforcing beam, the reinforcing beam being connected to the sill beam and the sill connection part.

[0021] Optionally, in the vehicle width direction, the reinforcing beam is arranged between the sill beam and the sill connection part.

[0022] Optionally, the front side of the reinforcing beam is connected to the rear casting of the front longitudinal beam, extends toward the side surface of the lower cross beam of the front panel, and is connected to the rear casting of the front longitudinal beam.

[0023] Optionally, the body frame structure further includes: a front seat cross member, both ends of the front seat cross member are respectively connected to the sill; a middle floor cross member, the middle floor cross member is connected to the sill; in the vehicle front-rear direction, the front seat cross member is located in front of the middle floor cross member.

[0024] Optionally, both ends of the front seat cross member are respectively connected to the reinforcing beam.

[0025] Optionally, the front side of the middle floor cross member is connected to the rear side of the reinforcing beam.

[0026] Optionally, the rear end of the center tunnel is connected to the middle floor cross member.

[0027] Optionally, the body frame structure further includes: a front bumper beam, the front longitudinal beam is connected to the front bumper beam; a front energy absorber box, one end of the front energy absorber box is connected to the front bumper beam, and the other end is connected to the front longitudinal beam; a front energy absorber box reinforcing beam, one end of the front energy absorber box is connected to the front bumper beam, and the other end of the front energy absorber box reinforcing beam extends to the front longitudinal beam; in the vehicle width direction, at least part of the front energy absorber box reinforcing beam is spaced apart from at least part of the front longitudinal beam.

[0028] Optionally, the front energy absorber box reinforcing beam is directly connected to the front energy absorber box or the front longitudinal beam.

[0029] Optionally, the body frame structure further includes: a front energy absorber box mounting column, the energy absorber box is connected to the front longitudinal beam through the front energy absorber box mounting column.

[0030] Optionally, the upper side beam is connected to the front energy absorber box mounting column.

[0031] Optionally, the body frame structure further includes a front wheel arch, the front wheel arch is connected to the upper side beam.

[0032] Optionally, the front energy absorber box mounting column extends in the vehicle height direction, and the lower end of the front energy absorber box mounting column is formed as a subframe mounting seat.

[0033] Optionally, the body frame structure further includes: two rear longitudinal beams spaced apart in the vehicle width direction, the rear longitudinal beams are connected to the sill.

[0034] Optionally, the body frame structure further includes a rear underfloor cross member, both ends of the rear underfloor cross member are respectively connected to the sill.

[0035] Optionally, the body frame structure further includes a rear longitudinal beam connecting member, the rear longitudinal beam is connected to the sill through the rear longitudinal beam connecting member.

[0036] Optionally, the rear longitudinal beam connecting member is connected to the rear underfloor cross beam.

[0037] Optionally, the projection of the rear longitudinal beam connecting member in the vehicle's front-rear direction at least partially overlaps with the projection of the sill beam in the vehicle's front-rear direction.

[0038] Optionally, the rear longitudinal beam connecting member includes a rear longitudinal beam middle support beam and a rear longitudinal beam inner support beam. One end of the rear longitudinal beam middle support beam is connected to the rear longitudinal beam, and the other end is connected to the rear underfloor cross beam; one end of the rear longitudinal beam inner support beam is connected to the rear longitudinal beam, and the other end is connected to the sill. Wherein, in the vehicle width direction, the ends of the rear longitudinal beam middle support beam and the rear longitudinal beam inner support beam away from the rear longitudinal beam are spaced apart.

[0039] Optionally, the rear longitudinal beam connecting member further includes a rear longitudinal beam outer support beam. One end of the rear longitudinal beam outer support beam is connected to the rear longitudinal beam, and the other end is connected to the sill.

[0040] Optionally, the projection of the rear longitudinal beam outer support beam in the vehicle's front-rear direction at least partially overlaps with the projection of the sill beam in the vehicle's front-rear direction.

[0041] Optionally, in the vehicle width direction, the ends of the rear longitudinal beam outer support beam and the rear longitudinal beam middle support beam away from the rear longitudinal beam are spaced apart.

[0042] Optionally, in the vehicle height direction, the rear longitudinal beam outer support beam is located below the rear longitudinal beam middle support beam.

[0043] Optionally, the body frame structure further includes a rear frame stabilizer bar, and both ends of the rear frame stabilizer bar are respectively connected to the rear longitudinal beam.

[0044] In a second aspect of the present invention, there is provided a vehicle, including: the body frame structure described in the above embodiments; a subframe, and the subframe is connected to the body frame structure.

[0045] The body frame structure of the present invention forms a middle force transmission structure of the body frame structure through the front cross beam and the front apron lower cross beam, effectively transmits the collision force to the rear of the vehicle, increases the middle force transmission path of the body, and improves the collision performance of the vehicle.

[0046] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. Description of the Drawings

[0047] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0048] Figure 1It is a partial structural schematic diagram of a vehicle body frame structure according to an embodiment of the present invention;

[0049] Figure 2 It is a structural schematic diagram of a middle frame of a vehicle body frame structure according to an embodiment of the present invention;

[0050] Figure 3 It is a partial structural schematic diagram of a middle frame of a vehicle body frame structure according to an embodiment of the present invention;

[0051] Figure 4 It is another partial structural schematic diagram of a middle frame of a vehicle body frame structure according to an embodiment of the present invention;

[0052] Figure 5 It is a structural schematic diagram of a front frame of a vehicle body frame structure according to an embodiment of the present invention;

[0053] Figure 6 It is another structural schematic diagram of a front frame of a vehicle body frame structure according to an embodiment of the present invention;

[0054] Figure 7 It is a structural schematic diagram of a rear frame of a vehicle body frame structure according to an embodiment of the present invention;

[0055] Figure 8 It is a partial structural schematic diagram of a rear frame of a vehicle body frame structure according to an embodiment of the present invention.

[0056] Reference numerals:

[0057] Front frame 10; front anti-collision beam 11; front longitudinal beam 12; upper side beam 13; subframe 14; front anti-collision beam connecting plate 15; front energy-absorbing box 16; front energy-absorbing box strengthening beam 17; front energy-absorbing box bolt sleeve 18; front energy-absorbing box mounting column 19; floor 101; fork arm rear support 102; front fender frame 103; front wheel housing 104; shock absorber bracket 105; front subframe 106; front subframe front point mounting block 107;

[0058] Middle frame 20; front cross beam 21; lower front bulkhead cross beam 22; central tunnel 23; rear casting of front longitudinal beam 24; rear brace of front longitudinal beam 25; sill 26; central beam 27; front seat cross beam 28; middle floor cross beam 29; seat mounting longitudinal beam 201; strengthening beam 202; sill beam 203;

[0059] Rear frame 30; rear anti-collision beam 31; rear longitudinal beam 32; rear frame stabilizer bar 34; rear wheel housing 36; outer brace beam of rear longitudinal beam 304; lower rear floor cross beam 305; inner brace beam of rear longitudinal beam 306; front joint of rear longitudinal beam 307; middle brace beam of rear longitudinal beam 310. Detailed implementation manners

[0060] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0061] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention or its application or use.

[0062] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0063] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0064] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0065] In the description of the present invention, features related to the terms "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0066] In the description of the present invention, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0067] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" involved should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] The following specifically describes the body frame structure according to an embodiment of the present invention with reference to the accompanying drawings.

[0069] As Figure 1 and Figure 2 shown, the body frame structure according to an embodiment of the present invention includes two front longitudinal beams 12, a front cross beam 21, and a lower front bulkhead cross beam 22.

[0070] Specifically, the two front longitudinal beams 12 are arranged at intervals in the vehicle width direction. The two ends of the front cross beam 21 are respectively connected to the two front longitudinal beams 12. The two ends of the lower front bulkhead cross beam 22 are respectively connected to the two front longitudinal beams 12, the lower front bulkhead cross beam 22 is connected to the front cross beam 21, and the lower front bulkhead cross beam 22 is provided on the side of the front cross beam 21 facing the vehicle tail.

[0071] In other words, as Figure 1 and Figure 2 shown, the body frame structure according to an embodiment of the present invention mainly consists of two front longitudinal beams 12, a front cross beam 21, and a lower front bulkhead cross beam 22. Among them, the two front longitudinal beams 12 are arranged at intervals in the vehicle width direction. The two ends of the front cross beam 21 are respectively connected to the two front longitudinal beams 12. The two ends of the lower front bulkhead cross beam 22 are respectively connected to the two front longitudinal beams 12, and the front cross beam 21 is located at the root of the front longitudinal beam 12 (the inner side of the two side castings). The lower front bulkhead cross beam 22 extends along the end of the front cross beam 21 towards the vehicle tail direction, and the lower front bulkhead cross beam 22 is directly connected to the front cross beam 21, and the lower front bulkhead cross beam 22 is provided on the side of the front cross beam 21 facing the vehicle tail. The lower front bulkhead cross beam 22 and the front cross beam 21 cooperate to form a first force transmission structure. The first force transmission structure serves as the middle force transmission structure of the body frame, and can transmit the collision force to the rear of the vehicle, increasing the middle force transmission path of the body and improving the collision performance of the vehicle.

[0072] In the present invention, as Figure 1 shown, the body frame structure according to an embodiment of the present invention can be roughly divided into a front frame 10, a middle frame 20, and a rear frame 30 that are sequentially connected along the vehicle length direction. Among them, the middle frame 20 can absorb the collision force transmitted by the front frame 10 and transmit a part of the collision force to the rear frame 30, realizing the absorption and dispersion of the collision energy and improving the collision performance of the body frame structure. As Figure 1 andFigure 2 As shown, the middle frame 20 can be partially constituted by the front cross member 21 and the lower front panel cross member 22. The lower front panel cross member 22 extends along the end of the front cross member 21 towards the rear of the vehicle body. The lower front panel cross member 22 and the front cross member 21 cooperate to form a first force transmission structure. As the middle force transmission structure of the vehicle body frame, the first force transmission structure can transmit the collision force to the central tunnel 23 at the rear of the vehicle body, increasing the middle force transmission path of the vehicle body and improving the collision performance of the vehicle.

[0073] In the present invention, the middle force transmission structure (the first force transmission structure) of the vehicle body frame is mainly divided into the X-direction force transmitted from the front frame 10, the Y-direction force received by the carbon cabin itself during side collisions, and the force transmitted from rear collisions. During a frontal head-on collision, it is borne by the entire carbon cabin.

[0074] It should be noted that the front, middle, rear, left, and right orientation descriptions in the present invention are all referenced with the front, rear, left, and right of the vehicle body as the reference points. X, Y, and Z respectively represent the length direction, width direction, and height direction of the vehicle body, and will not be re-explained in the following embodiments of the present invention.

[0075] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, at least part of the front cross member 21 is located above at least part of the lower front panel cross member 22, which is beneficial to the transmission of the collision force and improves the collision performance of the vehicle body.

[0076] According to an embodiment of the present invention, the front cross member 21 is an integrally formed structure, which improves the overall structural strength of the front cross member 21 and is beneficial to enhancing the collision force of the vehicle body. Or the lower front panel cross member 22 can be an integrally formed structure, which improves the overall structural strength of the lower front panel cross member 22 and is beneficial to enhancing the collision force of the vehicle body. Of course, both the front cross member 21 and the lower front panel cross member 22 can also be integrally formed structures to further enhance the collision force of the vehicle body.

[0077] According to an embodiment of the present invention, as Figure 3 shown, the vehicle body frame structure further includes a central tunnel 23, and the central tunnel 23 is connected to the lower front panel cross member 22. The lower front panel cross member 22 extends along the end of the front cross member 21 towards the rear of the vehicle body, and the lower front panel cross member 22 is directly connected to the front cross member 21. The lower front panel cross member 22 and the front cross member 21 cooperate to form a first force transmission structure. As the middle force transmission structure of the vehicle body frame, the first force transmission structure can transmit the collision force to the central tunnel 23, increasing the middle force transmission path of the vehicle body and improving the collision performance of the vehicle.

[0078] The body frame structure of the present invention forms the middle force transmission structure of the body frame structure through the front cross beam 21 and the lower front panel cross beam 22, effectively transmits the collision force to the central tunnel 23, and transmits it to the rear frame 30 through the central tunnel 23, increasing the middle force transmission path of the body and improving the collision performance of the vehicle.

[0079] According to an embodiment of the present invention, as Figure 3 and Figure 4 shown, the projection of the lower front panel cross beam 22 in the vehicle height direction overlaps at least partially with the projection of the central tunnel 23 in the vehicle height direction, ensuring that the lower front panel cross beam 22 can effectively transmit the collision force to the central tunnel 23 and then transmit it to the rear of the vehicle through the central tunnel.

[0080] According to an embodiment of the present invention, as Figure 3 and Figure 4 shown, on one side of the lower front panel cross beam 22 away from the central tunnel 23 in the vehicle height direction, it is designed as a plane, and the plane is used to connect the battery pack to ensure the stable installation of the battery pack and the lower front panel cross beam 22.

[0081] According to an embodiment of the present invention, as Figure 3 and Figure 4 shown, the front cross beam 21 is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity. By arranging the reinforcing ribs, the overall structural strength of the front cross beam 21 is further improved. Alternatively, the lower front panel cross beam 22 is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity to improve the overall structural strength of the lower front panel cross beam 22. Of course, in the present invention, the cavities of the front cross beam 21 and the lower front panel cross beam 22 can both be provided with reinforcing ribs to further improve the overall structural strength of the body frame structure.

[0082] In the present invention, the cross section of the front cross beam 21 is in the shape of a Chinese character 'Mu', and the cross section of the lower front panel cross beam 22 is triangular. That is to say, as Figure 3 shown, the middle frame of the present invention adopts a frame type middle force transmission structure. A front cross beam 21 with a cross section in the shape of a Chinese character 'Mu' is arranged at the root of the front longitudinal beam 12 (inside the two side castings), and a lower front panel cross beam 22 with a triangular cross section is arranged behind the front cross beam 21. The front cross beam 21 and the lower front panel cross beam 22 transmit the collision force transmitted by the front longitudinal beam 12 to the central tunnel 23. The central tunnel 23 is arranged in the middle in the Y direction of the lower front panel cross beam 22 and extends backward along the X direction of the vehicle body. In terms of the front collision force transmission, by arranging the front cross beam 21 with a cross section in the shape of a Chinese character 'Mu' and the lower front panel cross beam 22 with a triangular cross section, the collision ability of the middle frame 20 is effectively improved.

[0083] According to an embodiment of the present invention, as Figure 1 and Figure 2As shown, the body frame structure further includes: a rear casting 24 of the front longitudinal beam and a rear brace 25 of the front longitudinal beam. The rear casting 24 of the front longitudinal beam and the rear brace 25 of the front longitudinal beam also form part of the structure of the middle frame 20. Among them, the rear casting 24 of the front longitudinal beam is connected to the rear brace 25 of the front longitudinal beam. In the vehicle's front-rear direction, at least part of the front longitudinal beam 12 is located on the front side of the rear casting 24 of the front longitudinal beam and the rear brace 25 of the front longitudinal beam. And the front longitudinal beam 12 is respectively connected to the rear casting 24 of the front longitudinal beam and the rear brace 25 of the front longitudinal beam to receive the collision force transmitted by the front longitudinal beam 12, so as to realize the dispersion and transmission of collision energy.

[0084] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, the rear casting 24 of the front longitudinal beam is connected to the rear brace 25 of the front longitudinal beam. The rear brace 25 of the front longitudinal beam is connected to the front cross beam 21, and a part of the rear casting 24 of the front longitudinal beam extends in a direction away from the front cross beam 21 to realize the transmission of the collision force.

[0085] In the present invention, referring to Figure 1 and Figure 2 , the rear casting 24 of the front longitudinal beam is installed on the opposite sides of the end of the front cross beam 21. The rear brace 25 of the front longitudinal beam is connected to the side of the front cross beam 21 facing the vehicle's tail, and the lower cross beam 22 of the front bulkhead is connected to the rear casting 24 of the front longitudinal beam and the rear brace 25 of the front longitudinal beam. In the middle force transmission structure of the middle frame 20, it is mainly divided into the X-direction force transmitted from the front frame 10, the Y-direction force received by the carbon cabin itself during a side collision, and the force transmitted from a rear collision. Among them, the collision force during a frontal collision is borne by the carbon cabin as a whole.

[0086] The X-direction force transmitted from the front frame 10 ( Figure 2 the arrow in it indicates the force transmission path), one of its component forces is transmitted backward through the front cross beam 21, the rear casting 24 of the front longitudinal beam, the rear brace 25 of the front longitudinal beam, the lower cross beam 22 of the front bulkhead and other components to form a first force transmission structure to realize the dispersion of collision energy. It should be noted that those skilled in the art can understand that for the structure of the vehicle body, there are two rear castings 24 of the front longitudinal beam and two rear braces 25 of the front longitudinal beam, and they are symmetrically arranged left and right in the vehicle body width direction. And for the structures such as the sill 26, the front longitudinal beam 12, and the rear longitudinal beam 32 in the body frame structure, there are two symmetrically arranged ones, which will not be described in detail in the following embodiments of the present invention.

[0087] In some specific embodiments of the present invention, as Figures 1 to 3 shown, the rear casting 24 of the front longitudinal beam is connected to the lower cross beam 22 of the front bulkhead. In the vehicle's front-rear direction, the rear casting 24 of the front longitudinal beam extends backward to the rear side of the lower cross beam 22 of the front bulkhead. The projection of the rear casting 24 of the front longitudinal beam in the vehicle width direction and the projection of the rear brace 25 of the front longitudinal beam in the vehicle width direction at least partially overlap to ensure the effective transmission of the collision force.

[0088] By arranging a front crossbeam 21 with an eye-shaped cross-section at the root of the front longitudinal beam 12 (inside the two-sided castings), a front apron lower crossbeam 22 with a triangular cross-section is connected between the front crossbeam 21 and the rear casting 24 of the front longitudinal beam. The front crossbeam 21 and the front apron lower crossbeam 22 transfer the collision force transmitted by the front longitudinal beam 12 to the central tunnel 23. The central tunnel 23 is arranged in the middle of the front apron lower crossbeam 22 in the Y direction and extends backward along the X direction of the vehicle body. In terms of frontal collision force transmission, by arranging the front crossbeam 21 with an eye-shaped cross-section and the front apron lower crossbeam 22 with a triangular cross-section, the collision resistance of the middle frame 20 is effectively improved.

[0089] According to an embodiment of the present invention, the rear casting 24 of the front longitudinal beam is an integrally formed structure, which improves the overall structural strength of the rear casting 24 of the front longitudinal beam. Alternatively, the rear brace 25 of the front longitudinal beam is an integrally formed structure, which improves the overall structural strength of the rear brace 25 of the front longitudinal beam. Of course, both the rear casting 24 of the front longitudinal beam and the rear brace 25 of the front longitudinal beam can be integrally formed parts, further improving the overall structural strength of the vehicle body frame structure and being beneficial to improving the collision performance of the vehicle body.

[0090] According to an embodiment of the present invention, as Figure 2 shown, the vehicle body frame structure further includes: a sill 26, and the sill 26 is connected to the sill connection part of the rear casting 24 of the front longitudinal beam. The sill 26 is used as a part of the structure of the middle frame 20 and is used to transmit the collision force backward. The X-direction force ( Figure 2 the arrow in the figure indicates the force transmission path) transmitted from the front frame 10, and one of its component forces is transmitted backward through a first force transmission structure composed of several components such as the front crossbeam 21, the rear casting 24 of the front longitudinal beam, the rear brace 25 of the front longitudinal beam, and the front apron lower crossbeam 22 to disperse the collision energy. The collision force transmitted by the first force transmission structure is transmitted to the central beam 27 which is connected to the front crossbeam 21. The central beam 27 and the sill 26 form a second force transmission structure, and the two sills 26 on the left and right and the central beam 27 together bear the collision force transmitted by the first force transmission structure.

[0091] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, the front side of the sill 26 is connected to the rear casting 24 of the front longitudinal beam. At the same time, the sill 26 extends toward the side surface of the front apron lower crossbeam 22 and is connected to the rear casting 24 of the front longitudinal beam, improving the force transmission effect and the frontal collision and side collision capabilities.

[0092] According to an embodiment of the present invention, a sill beam receiving cavity is arranged at the sill connection part, and at least part of the sill beam 203 is arranged in the sill beam receiving cavity, ensuring the structural stability of the sill 26, being beneficial to improving the force transmission effect and the frontal collision and side collision capabilities.

[0093] According to an embodiment of the present invention, the body frame structure further includes a reinforcing beam 202, and the reinforcing beam 202 is connected to the sill beam 203 and the sill connection part. By providing the reinforcing connection, the overall structural strength of the sill 26 is further improved, the overall collision performance of the body frame structure is improved, and the front collision and side collision capabilities are improved.

[0094] According to an embodiment of the present invention, in the vehicle width direction, the reinforcing beam 202 is disposed between the sill beam 203 and the sill connection part, which is beneficial to enhancing the overall structural strength of the sill 26, improving the overall collision performance of the body frame structure, and improving the front collision and side collision capabilities.

[0095] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, the front side of the reinforcing beam 202 is connected to the rear casting 24 of the front longitudinal beam, and extends toward the side surface of the lower cross beam 22 of the front panel, and is connected to the rear casting 24 of the front longitudinal beam, further enhancing the force transmission effect and improving the front collision and side collision capabilities.

[0096] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, the body frame structure further includes: a front seat cross beam 28 and a floor middle cross beam 29. Among them, both ends of the front seat cross beam 28 are respectively connected to the sill 26. The floor middle cross beam 29 is connected to the sill 26; in the vehicle front-rear direction, the front seat cross beam 28 is located in front of the floor middle cross beam 29. The front seat cross beam 28 passes through the central beam 27, and both ends of the front seat cross beam 28 are respectively connected to the sill 26. The left and right sills 26 and the central beam 27 together bear the collision force transmitted by the first force transmission structure, and at the same time, these components are assisted by the front seat cross beam 28 and the floor middle cross beam 29 to improve the lateral stability. The floor middle cross beam 29 is arranged in parallel with the front seat cross beam 28, and the floor middle cross beam 29 is respectively connected to the sill 26 and the central beam 27. The floor middle cross beam 29, the sill 26, the central beam 27 and the front seat cross beam 28 form a third force transmission structure. The first force transmission structure as a whole forms a structural shape of a field plus a mouth, and receives the collision force transmitted by the second force transmission structure and the collision force transmitted by the rear frame 30.

[0097] In the present invention, the front seat cross beam 28 is bolted to the central beam 27. Other structural components of the middle frame 20 can also be connected and fixed by means of bolts, nuts, or spot welding, CO2 gas shielded welding, etc., to improve the overall stability of the body frame structure.

[0098] In some specific embodiments of the present invention, referring to Figure 1 and Figure 2, both ends of the front seat crossbeam 28 are respectively connected to the reinforcing beam 202. The front side of the floor middle crossbeam 29 is connected to the rear side of the reinforcing beam 202, improving the force transmission effect and increasing the front-back force transmission path of the vehicle body. The rear end of the central tunnel 23 is connected to the floor middle crossbeam 29, further enhancing the force transmission effect.

[0099] As Figure 1 and Figure 2 shown, the floor middle crossbeam 29 is respectively connected to the sill 26 and the central beam 27. The floor middle crossbeam 29, the sill 26, the central beam 27 and the front seat crossbeam 28 form a structure of a Chinese character "tian" plus a Chinese character "kou", and the sill 26 and the floor middle crossbeam 29 and the rear frame 30 form a structure of a Chinese character "kou". The Y-direction force received by the carbon cabin itself during a side collision is mainly borne by the third force transmission structure of the "tian + kou" shape (see Figure 2 ). When the left and right sills 26 receive the force from a side collision, the left and right sills 26 and the seat installation longitudinal beam 201 distribute this force to the floor middle crossbeam 29, the front seat crossbeam 28, the lower front bulkhead crossbeam 22 and the rear frame 30 through their own rigidity (deflection).

[0100] According to the principle of force and moment balance, the middle crossbeam bears a large force, and the two end crossbeams bear a small force. Among them, the front seat crossbeam 28 is the main force transmission component. To prevent the front crossbeam from being bent due to excessive force, it is designed to be combined with the central beam 27 to improve its bending resistance performance. The collision force transmitted from the rear is distributed by the rear frame 30 to the left and right sills 26. Since the value of the rear collision force is small, the middle longitudinal beam (relative to the frontal collision) is cancelled in the present invention. Therefore, it only needs to form a structure of a Chinese character "kou" composed of the left and right sills 26, the rear frame 30 and the floor middle crossbeam 29 to meet the collision requirements. The parts described in the middle frame 20 of the present invention are all connected to each other by bolt and nut cooperation.

[0101] The middle frame 20 of the present invention, as Figure 4 shown, in terms of side collision force transmission, a seat installation longitudinal beam 201 is provided inside the sill 26 beam, and a seat installation crossbeam with a closed cross-section is provided between the seat installation longitudinal beams 201. These two crossbeams transmit and disperse the collision force transmitted from the side sill 26 to the middle. In terms of rear collision force transmission, a backrest rear crossbeam is provided at the front section of the rear longitudinal beam (inside the two castings). This crossbeam transmits the collision force transmitted from the rear frame to the sill 26.

[0102] According to an embodiment of the present invention, the vehicle body frame structure further includes: a front anti-collision beam 11, a front energy absorption box 16, and a front energy absorption box reinforcing beam 17. Among them, the front longitudinal beam 12 is connected to the front anti-collision beam 11. One end of the front energy absorption box 16 is connected to the front anti-collision beam 11, and the other end is connected to the front longitudinal beam 12. For the front energy absorption box reinforcing beam 17, one end of the front energy absorption box 16 is connected to the front anti-collision beam 11, and the other end of the front energy absorption box reinforcing beam 17 extends to the front longitudinal beam 12. In the vehicle width direction, at least part of the front energy absorption box reinforcing beam 17 is spaced apart from at least part of the front longitudinal beam 12. The front energy absorption box reinforcing beam 17, the front energy absorption box 16, and the front anti-collision beam 11 form a triangular fourth force transmission structure.

[0103] In the present invention, Figure 6 The arrow direction indicates the force transmission direction. The collision force transmitted from the front anti-collision beam 11 to the front longitudinal beam 12 can be decomposed. The force value of the frontal collision is dispersed by the front anti-collision beam 11 to the left and right two sub-assemblies to bear together. According to the balance of force and moment, it is necessary to consider the transmission of the X-direction force and the stability of the Y-direction structure at the same time. The decomposition of the X-direction force value is as follows: Taking the left half as an example, the right half is designed in the same way and is also symmetrical. From the middle of the front anti-collision beam 11 (or the force received in the offset collision), it is transmitted through the front anti-collision beam 11 itself to the small sub-assembly (the fourth force transmission structure) composed of the front anti-collision beam connecting plate 15 and the front energy absorption box 16 by shielded metal arc welding.

[0104] In the present invention, as Figure 5 and Figure 6 shown, the front frame 10 includes structures such as a front anti-collision beam 11, a front longitudinal beam 12, a front fender frame 103, and a front suspension structure. Among them, the front longitudinal beam 12 is connected to the front anti-collision beam. The front fender frame 103 is connected to the front longitudinal beam 12. The front suspension structure is connected to the front longitudinal beam 12. The front longitudinal beam 12 receives the collision force of the front anti-collision beam 11 and divides the collision force into multiple layers of collision force transmission routes through the front longitudinal beam 12, the front fender frame 103, and the front suspension structure. The front anti-collision beam 11 and the front longitudinal beam 12 are assembled and connected by bolts and nuts. The front longitudinal beam 12 and the front fender frame 103 are connected by bolts, nuts, and welds. The front longitudinal beam 12 and the front suspension structure are assembled and connected by bolts and nuts, thereby realizing the upper, middle, and lower three-layer frontal collision force transmission structure.

[0105] According to an embodiment of the present invention, the front energy absorption box reinforcing beam 17 is directly connected to the front energy absorption box 16 or the front longitudinal beam 12, improving the collision force transmission effect of the front frame 10 and enhancing the overall collision performance of the vehicle body frame.

[0106] According to an embodiment of the present invention, the vehicle body frame structure further includes: a front energy absorption box mounting column 19 and a front energy absorption box 16. The front energy absorption box mounting column 19 is connected to the front longitudinal beam 12 to form a stable force transmission structure. As Figure 5 and Figure 6As shown in the figure, the front energy absorption box bolt sleeve 18 connects the front energy absorption box 16 and the front energy absorption box reinforcement beam 17. The front energy absorption box mounting column 19 connects the front energy absorption box 16, the front longitudinal beam 12 and the front energy absorption box reinforcement beam 17 to construct the fourth force transmission structure into the first-level linear force transmission structure. The fourth force transmission structure and the front bumper beam 11, the front energy absorption box reinforcement beam 17, the front energy absorption box bolt sleeve 18, and the front energy absorption box mounting column 19 on the left side of the vehicle body form a stable triangular small assembly stable force transmission structure. As the first-level force transmission foundation, this structure can be regarded as the first-level linear force transmission structure along the X-axis in the overall vehicle dimension. Similarly, on the right side of the vehicle body, the first-level linear force transmission structure along the X-axis is also composed of the local part of the front bumper beam 11, the front bumper beam connection plate 15 on the right side, the front energy absorption box 16, the front energy absorption box reinforcement beam 17, the front energy absorption box bolt sleeve 18, and the front energy absorption box mounting column 19, realizing the effective dispersion of collision energy and improving the collision performance of the vehicle body frame structure.

[0107] See Figure 5 and Figure 6 , the front bumper beam 11, the front bumper beam connection plate 15, the front energy absorption box 16, the front energy absorption box reinforcement beam 17, the front energy absorption box bolt sleeve 18, and the front cabin front cross beam form a ring-shaped first-level planar force transmission structure. The connections between all parts in this ring-shaped first-level planar force transmission structure can be connected by bolts and nuts to improve the overall stability of the first-level planar force transmission structure.

[0108] As Figure 5 shown, the front frame 10 further includes a floor 101 and a fork arm rear support 102. Among them, the floor 101 is connected to the middle frame 20. The left and right fork arm rear supports 102 are respectively connected to the corresponding front longitudinal beam 12 and the floor 101, and the first-level planar force transmission structure, the floor 101, and the fork arm rear support 102 form a second-level planar force transmission structure. The front longitudinal beam 12 on the left side of the vehicle body is connected to the fork arm rear support 102 and the floor 101 by bolts and nuts.

[0109] Similarly, the front longitudinal beam 12 on the right side of the vehicle body is also connected to the fork arm rear support 102 and the floor 101 by bolts and nuts. The first-level planar force transmission and the second-level plane are connected by parts such as the front energy absorption box mounting column 19, the front energy absorption box reinforcement beam 17, the front energy absorption box bolt sleeve 18, and the front energy absorption box reinforcement beam 17, and the connection method can also be bolted connection. That is, the front energy absorption box bolt sleeve 18 on the left side of the vehicle body, the front energy absorption box mounting column 19, and the front energy absorption box reinforcement beam 17 are simultaneously connected to the front energy absorption box 16 and the front longitudinal beam 12 by bolts and nuts. Similarly, the front energy absorption box bolt sleeve 18 on the right side of the vehicle body, the front energy absorption box mounting column 19, and the front energy absorption box reinforcement beam 17 are simultaneously connected to the front energy absorption box 16 and the front longitudinal beam 12 by bolts and nuts.

[0110] According to an embodiment of the present invention, the upper side member 13 is connected to the front energy absorption box mounting column 19. The upper side member 13, as a part of the structure of the front frame 10, forms a front force transmission structure, increasing the transmission path of the collision force.

[0111] According to an embodiment of the present invention, as Figure 1 and Figure 2 shown, the body frame structure further includes a front wheel housing 104, and the front wheel housing 104 is connected to the upper side member 13. The front energy absorption box mounting column 19, the upper side member 13, the front wheel housing 104, the shock absorber bracket 105 and the floor 101 constitute a fifth force transmission structure. The body frame structure of the present invention expands from a plane to a three-dimensional space XYZ, that is, an upper-middle-lower three-layer frontal collision force transmission structure is adopted to suppress the rotation of the plane force transmission structure in the XZ plane. The upper force transmission assembly is formed by the front energy absorption box mounting column 19 together with the upper side member 13, the front wheel housing 104, the shock absorber bracket 105 and the floor 101. Among them, the front energy absorption box mounting column 19 and the upper side member 13 are connected by bolts and nuts, and the upper side member 13 is connected to the front wheel housing 104, the shock absorber bracket 105 and the floor 101 by welding spots.

[0112] According to an embodiment of the present invention, the front energy absorption box mounting column 19 extends along the vehicle height direction, and the lower end of the front energy absorption box mounting column 19 is formed as a subframe mounting seat, realizing multi-path transmission of the collision force, dispersing the expansion energy, and improving the collision performance of the vehicle body.

[0113] In the present invention, as Figure 6 shown, the front energy absorption box mounting column 19, the front subframe front point mounting block 107, the front subframe 106 and the floor 101 constitute a sixth force transmission structure. The fifth force transmission structure, the fourth force transmission structure and the sixth force transmission structure transmit force in the vehicle body height direction respectively, and the fifth force transmission structure, the fourth force transmission structure and the sixth force transmission structure form a stable structure in the shape of a Chinese character 'Ri'. Its lower layer connection is composed of the front energy absorption box mounting column 19 and the front subframe front point mounting block 107 in the middle layer force transmission path and the front subframe 106 and the floor 101. Among them, the front subframe front point mounting block 107 and the front energy absorption box mounting column 19 are connected by gas tungsten arc welding, and the front subframe front point mounting block 107 is connected to the front subframe 106, and the front subframe 106 and the floor 101 are connected by bolts and nuts. The three-layer structure in the second-level force transmission on the entire XZ plane forms a stable structure in the shape of a Chinese character 'Ri' to resist the intrusion of a frontal collision.

[0114] As Figure 6As shown in the figure, in the front frame 10 of the body frame structure of the present invention, a connecting beam is provided between the top of the front water tank column and the top of the front wheel housing 104, and the top of the front wheel housing 104 is directly connected to the rear carbon cabin to form an upper layer force transmission path. A rear section of the longitudinal beam is provided between the front longitudinal beam 12 and the sill 26, and the three form a middle layer force transmission path. A front subframe 106 is provided between the bottom of the front water tank column and the lower part of the front longitudinal beam 12 to complete the lower layer force transmission path for frontal collision, thereby realizing an upper, middle and lower three-layer frontal collision force transmission structure, effectively dispersing the collision energy and improving the vehicle collision performance.

[0115] According to an embodiment of the present invention, the body frame structure further includes: two rear longitudinal beams 32 spaced apart in the vehicle width direction, and the rear longitudinal beams 32 are connected to the sill to form a force transmission path at the rear of the vehicle body, improving the force transmission effect.

[0116] According to an embodiment of the present invention, the body frame structure further includes a rear floor lower cross beam 305, and both ends of the rear floor lower cross beam 305 are respectively connected to the sill 26 to form a force transmission path at the rear of the vehicle body, improving the force transmission effect.

[0117] According to an embodiment of the present invention, the body frame structure further includes a rear longitudinal beam connecting member, and the rear longitudinal beam 32 is connected to the sill 26 through the rear longitudinal beam connecting member to form a stable force transmission path for the rear frame 30, improving the rear collision performance of the vehicle body.

[0118] In some specific embodiments of the present invention, the rear longitudinal beam connecting member is connected to the rear floor lower cross beam 305. The projection of the rear longitudinal beam connecting member in the vehicle front-rear direction at least partially overlaps with the projection of the sill beam 203 in the vehicle front-rear direction, ensuring the stability of the connection between the rear longitudinal beam connecting member and the sill beam 203.

[0119] In some specific embodiments of the present invention, as Figure 7 shown, the rear longitudinal beam connecting member includes a rear longitudinal beam middle support beam 310 and a rear longitudinal beam inner support beam 306. One end of the rear longitudinal beam middle support beam 310 is connected to the rear longitudinal beam, and the other end is connected to the rear floor lower cross beam 305. One end of the rear longitudinal beam inner support beam 306 is connected to the rear longitudinal beam, and the other end is connected to the sill 26. Among them, in the vehicle width direction, the ends of the rear longitudinal beam middle support beam 310 and the rear longitudinal beam inner support beam 306 away from the rear longitudinal beam 32 are spaced apart. The rear longitudinal beam connecting member further includes a rear longitudinal beam outer support beam 304, and one end of the rear longitudinal beam outer support beam 304 is connected to the rear longitudinal beam 32, and the other end is connected to the sill 26.

[0120] In the present invention, structures such as the rear bumper beam 31 and the rear longitudinal beam 32 form the rear frame 30. Among them, the rear longitudinal beam 32 is connected to the rear bumper beam 31. The rear bumper beam 31 and the rear longitudinal beam 32 form the seventh force transmission structure. The force acting on the vehicle in the X direction is mainly transmitted from the rear bumper beam 31 to the rear longitudinal beam 32411 and the rear longitudinal beam 32. The rear longitudinal beam 32 on the left side of the vehicle decomposes the force to the rear longitudinal beam inner support beam 306, the rear longitudinal beam middle support beam 310, and the rear longitudinal beam outer support beam 304 through the rear longitudinal beam front joint 307. In the front collision and rear collision of the present invention, the front collision is a single piece, and the rear collision disperses the force through three beams to the entire passenger compartment. The middle force value in the entire rear collision force is transmitted through the structure to the whole formed by the left and right sills 26 and the rear floor cross beam 305, and then dispersed and transmitted by this whole.

[0121] In some specific embodiments of the present invention, the projection of the rear longitudinal beam outer support beam 304 in the vehicle's front-rear direction overlaps at least partially with the projection of the sill beam 203 in the vehicle's front-rear direction. In the vehicle width direction, the ends of the rear longitudinal beam outer support beam 304 and the rear longitudinal beam middle support beam 310 away from the rear longitudinal beam 32 are spaced apart. In the vehicle height direction, the rear longitudinal beam outer support beam 304 is located below the rear longitudinal beam middle support beam 310. The middle force value in the entire rear collision force is transmitted through the structure to the whole formed by the left and right sills 26 and the rear floor cross beam 305, and then dispersed and transmitted by this whole, forming a multi-layer force transmission structure to the passenger compartment in the up-down direction and a multi-layer force transmission structure to the passenger compartment in the vehicle width direction.

[0122] According to an embodiment of the present invention, the body frame structure further includes a rear frame stabilizer bar 34. The two ends of the rear frame stabilizer bar 34 are respectively connected to the rear longitudinal beam 32. The rear frame stabilizer bar 34 serves as a lateral stability structure for suppressing the rotation in the XY plane, and at the same time can also bear the force transmission in the vehicle width direction. Further, the rear frame stabilizer bar 34 is provided at the connection between the rear longitudinal beam 32 and the rear longitudinal beam front joint 307, which can effectively strengthen the structural strength of the connection, ensure the strength of the connection and not be easily damaged when being collided, and improve the force transmission ability.

[0123] In the present invention, the rear subframe, the rear subframe rear mounting seat, the rear subframe front mounting seat, the rear longitudinal beam outer support beam 304, the rear floor cross beam 305, and the sill 26 form the ninth force transmission structure. The eighth force transmission structure, the seventh force transmission structure, and the ninth force transmission structure transmit forces in the vehicle height direction respectively.

[0124] As Figure 7 and Figure 8 shown, in the lower layer force transmission structure of the rear frame 30, the force transmitted from the rear bumper beam 31 is transmitted to the rear subframe rear mounting seat through the rear longitudinal beam 32, and then through the rear subframe, the rear subframe front mounting seat, and the rear longitudinal beam outer support beam 304 to the whole formed by the two sills 26 and the rear floor cross beam 305, thereby forming the entire rear collision force transmission frame.

[0125] The present invention is provided with a rear subframe below the longitudinal beam, and a lower connecting beam connected to the sill 26 is provided at the front section of the rear longitudinal beam, thereby forming a rear collision lower layer force transmission path.

[0126] In summary, for the body frame structure according to the embodiments of the present invention, upper, middle, and lower three-layer frontal collision force transmission structures are provided in the front frame 10, the middle frame 20 adopts a frame-type middle force transmission structure, and the rear frame 30 adopts a multi-layer rear collision force transmission structure, forming multiple force transmission paths, effectively dispersing collision energy, and improving the collision performance of the vehicle.

[0127] Certainly, for those skilled in the art, other structures and working principles of the body frame structure can be understood and implemented, and will not be elaborated in detail in the present invention.

[0128] According to a second aspect of the present invention, a vehicle is provided, including the body frame structure and the subframe 14 in the above embodiments, and the subframe 14 is connected to the body frame structure. Since the body frame structure according to the embodiments of the present invention has the above technical effects, therefore, the vehicle according to the embodiments of the present invention should also have corresponding technical effects, that is, the vehicle of the present invention adopts this body frame structure, can form multiple force transmission paths, effectively disperse collision energy, and improve the collision performance of the vehicle.

[0129] Certainly, for those skilled in the art, other structures and working principles of the vehicle can be understood and implemented, and will not be elaborated in detail in the present invention.

[0130] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for the purpose of limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A body frame structure, characterized in that, it includes: Two front longitudinal beams arranged at intervals in the vehicle width direction; A front cross beam, with both ends of the front cross beam respectively connected to the two front longitudinal beams; A lower front bulkhead cross beam, with both ends of the lower front bulkhead cross beam respectively connected to the two front longitudinal beams, the lower front bulkhead cross beam being connected to the front cross beam, and the lower front bulkhead cross beam being arranged on the side of the front cross beam facing the vehicle tail.

2. The body frame structure according to claim 1, characterized in that, At least part of the front cross beam is located above at least part of the lower front bulkhead cross beam.

3. The body frame structure according to claim 1, characterized in that, The front cross beam is an integrally formed structure; and / or; The lower front bulkhead cross beam is an integrally formed structure.

4. The body frame structure according to claim 1, characterized in that, It further includes a central tunnel, and the central tunnel is connected to the lower front bulkhead cross beam.

5. The body frame structure according to claim 4, characterized in that, The projection of the lower front bulkhead cross beam in the vehicle height direction and the projection of the central tunnel in the vehicle height direction at least partially overlap.

6. The body frame structure according to claim 4, characterized in that, In the vehicle height direction, the side of the lower front bulkhead cross beam away from the central tunnel is a plane, and the plane is used to connect the battery pack.

7. The body frame structure according to claim 1, characterized in that, The front cross beam is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity; and / or; The lower front bulkhead cross beam is provided with a cavity extending in the vehicle width direction, and reinforcing ribs are arranged in the cavity.

8. The body frame structure according to claim 1, characterized in that, It further includes: A rear casting of the front longitudinal beam; A rear brace of the front longitudinal beam, the rear casting of the front longitudinal beam being connected to the rear brace of the front longitudinal beam; In the vehicle front-rear direction, at least part of the front longitudinal beam is located in front of the rear casting of the front longitudinal beam and the rear brace of the front longitudinal beam, and the front longitudinal beam is respectively connected to the rear casting of the front longitudinal beam and the rear brace of the front longitudinal beam.

9. The body frame structure according to claim 8, characterized in that, The rear casting of the front longitudinal beam is connected to the rear brace of the front longitudinal beam; the rear brace of the front longitudinal beam is connected to the front cross beam, and a part of the rear casting of the front longitudinal beam extends in a direction away from the front cross beam.

10. The body frame structure according to claim 8, characterized in that, The rear casting of the front longitudinal beam is connected to the lower front bulkhead cross beam.

11. The body frame structure according to claim 8, characterized in that, In the vehicle front-rear direction, the rear casting of the front longitudinal beam extends backward to the rear side of the lower front bulkhead cross beam.

12. The body frame structure according to claim 8, characterized in that, The projection of the rear casting of the front longitudinal beam in the vehicle width direction and the projection of the rear brace of the front longitudinal beam in the vehicle width direction at least partially overlap.

13. The body frame structure according to claim 8, characterized in that, The rear casting of the front longitudinal beam is an integrally formed structure; and / or, the rear brace of the front longitudinal beam is an integrally formed structure.

14. The body frame structure according to claim 8, characterized in that, it further comprises: a sill, and the sill is connected to the sill connecting portion of the rear casting of the front longitudinal beam.

15. The body frame structure according to claim 14, characterized in that, the front side of the sill is connected to the rear casting of the front longitudinal beam, extends towards the side surface of the lower cross member of the front bulkhead, and is connected to the rear casting of the front longitudinal beam.

16. The body frame structure according to claim 14, characterized in that, a sill beam receiving cavity is provided at the sill connecting portion, and at least part of the sill beam is arranged in the sill beam receiving cavity.

17. The body frame structure according to claim 16, characterized in that, it further comprises a reinforcing beam, and the reinforcing beam is connected to the sill beam and the sill connecting portion.

18. The body frame structure according to claim 17, characterized in that, in the vehicle width direction, the reinforcing beam is arranged between the sill beam and the sill connecting portion.

19. The body frame structure according to claim 17, characterized in that, the front side of the reinforcing beam is connected to the rear casting of the front longitudinal beam, extends towards the side surface of the lower cross member of the front bulkhead, and is connected to the rear casting of the front longitudinal beam.

20. The body frame structure according to claim 17, characterized in that, it further comprises: a front seat cross beam, and both ends of the front seat cross beam are respectively connected to the sill; a floor middle cross beam, and the floor middle cross beam is connected to the sill; in the vehicle front-rear direction, the front seat cross beam is located in front of the floor middle cross beam.

21. The body frame structure according to claim 20, characterized in that, both ends of the front seat cross beam are respectively connected to the reinforcing beam.

22. The body frame structure according to claim 20, characterized in that, the front side of the floor middle cross beam is connected to the rear side of the reinforcing beam.

23. The body frame structure according to claim 20, characterized in that, the rear end of the central tunnel is connected to the floor middle cross beam.

24. The body frame structure according to claim 1, characterized in that, it further comprises: a front anti-collision beam, and the front longitudinal beam is connected to the front anti-collision beam; a front energy absorption box, one end of the front energy absorption box is connected to the front anti-collision beam, and the other end is connected to the front longitudinal beam; a front energy absorption box reinforcing beam, one end of the front energy absorption box is connected to the front anti-collision beam, and the other end of the front energy absorption box reinforcing beam extends to the front longitudinal beam; in the vehicle width direction, at least part of the front energy absorption box reinforcing beam is spaced apart from at least part of the front longitudinal beam.

25. The body frame structure according to claim 24, characterized in that, the front energy absorption box reinforcing beam is directly connected to the front energy absorption box or the front longitudinal beam.

26. The body frame structure according to claim 24, characterized in that, it further comprises: a front energy absorption box mounting column, and the energy absorption box is connected to the front longitudinal beam through the front energy absorption box mounting column.

27. The body frame structure according to claim 26, characterized in that, the upper side beam is connected to the front energy absorption box mounting column.

28. The body frame structure according to claim 27, It is characterized in that it further includes a front wheel arch, and the front wheel arch is connected to the upper side beam.

29. The body frame structure according to claim 26, it is characterized in that the front energy absorption box mounting column extends along the vehicle height direction, and the lower end of the front energy absorption box mounting column is formed as a subframe mounting seat.

30. The body frame structure according to claim 16, it is characterized in that it further includes: two rear longitudinal beams arranged at intervals in the vehicle width direction, and the rear longitudinal beams are connected to the sill.

31. The body frame structure according to claim 16, it is characterized in that it further includes a rear floor lower cross beam, and both ends of the rear floor lower cross beam are respectively connected to the sill.

32. The body frame structure according to claim 31, it is characterized in that it further includes a rear longitudinal beam connecting member, and the rear longitudinal beam is connected to the sill through the rear longitudinal beam connecting member.

33. The body frame structure according to claim 32, it is characterized in that the rear longitudinal beam connecting member is connected to the rear floor lower cross beam.

34. The body frame structure according to claim 32, it is characterized in that the projection of the rear longitudinal beam connecting member in the vehicle front-rear direction and the projection of the sill beam in the vehicle front-rear direction at least partially overlap.

35. The body frame structure according to claim 32, it is characterized in that the rear longitudinal beam connecting member includes a rear longitudinal beam middle support beam and a rear longitudinal beam inner support beam. One end of the rear longitudinal beam middle support beam is connected to the rear longitudinal beam, and the other end is connected to the rear floor lower cross beam; one end of the rear longitudinal beam inner support beam is connected to the rear longitudinal beam, and the other end is connected to the sill; wherein, in the vehicle width direction, the ends of the rear longitudinal beam middle support beam and the rear longitudinal beam inner support beam away from the rear longitudinal beam are arranged at intervals.

36. The body frame structure according to claim 35, it is characterized in that the rear longitudinal beam connecting member further includes a rear longitudinal beam outer support beam. One end of the rear longitudinal beam outer support beam is connected to the rear longitudinal beam, and the other end is connected to the sill.

37. The body frame structure according to claim 36, it is characterized in that the projection of the rear longitudinal beam outer support beam in the vehicle front-rear direction and the projection of the sill beam in the vehicle front-rear direction at least partially overlap.

38. The body frame structure according to claim 36, it is characterized in that in the vehicle width direction, the ends of the rear longitudinal beam outer support beam and the rear longitudinal beam middle support beam away from the rear longitudinal beam are arranged at intervals.

39. The body frame structure according to claim 37, it is characterized in that in the vehicle height direction, the rear longitudinal beam outer support beam is located below the rear longitudinal beam middle support beam.

40. The body frame structure according to claim 30, it is characterized in that it further includes a rear frame stabilizer bar, and both ends of the rear frame stabilizer bar are respectively connected to the rear longitudinal beam.

41. A vehicle, it is characterized in that it includes: the body frame structure according to any one of claims 1-40; a subframe, and the subframe is connected to the body frame structure.

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