Vehicle body reinforcement structure and vehicle provided therewith

Abstract

The application provides a vehicle body reinforcing structure and a vehicle provided with the same. The vehicle body reinforcing structure comprises a rear floor framework in a rear floor assembly, front floor upper longitudinal beams arranged on left and right sides, and a front wall lower cross beam. The vehicle body reinforcing structure further comprises a rear floor lower cross beam connected to a bottom of the rear floor framework, rocker beams arranged on the left and right sides, and a torsion box connected to rear ends of the front engine compartment longitudinal beams on the left and right sides. The rear floor framework, the front wall lower cross beam, and the front floor upper longitudinal beams and the front wall longitudinal beams on the left and right sides are connected to form a first annular reinforcing structure. The rear floor lower cross beam, the engine compartment rear section cross beam, and the rocker beams and the torsion box on the left and right sides are connected to form a second annular reinforcing structure. The vehicle body reinforcing structure can increase the structural strength and torsional stiffness of the vehicle body, improve the collision force transmission effect during a collision, and improve the safety of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle body technology, and particularly to a body reinforcement structure. The invention also relates to a vehicle equipped with the aforementioned body reinforcement structure. Background Technology

[0002] Currently, with the development of automotive technology and the improvement of people's living standards, the popularity of cars among the public is increasing. Especially with the rapid development of new energy vehicles, car companies are also transforming towards electrification and launching a variety of pure electric or hybrid models to meet people's different car usage needs.

[0003] Regardless of whether it's a gasoline-powered vehicle or a new energy vehicle, as people pay increasing attention to overall vehicle safety, the structural strength of the vehicle body and its ability to transmit collision forces have become key focuses for automakers' R&D personnel. Therefore, improving and optimizing the vehicle body structure to enhance its performance, improve its force transmission capabilities during collisions, and ultimately improve overall vehicle safety is of paramount importance. Summary of the Invention

[0004] In view of this, the present invention aims to propose a vehicle body reinforcement structure that can increase the structural strength and torsional stiffness of the vehicle body, thereby improving the overall vehicle safety.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A vehicle body reinforcement structure includes a rear floor frame in a rear floor assembly, longitudinal beams on the front floor on the left and right sides, and a lower crossbeam of the front bulkhead. It also includes a lower crossbeam of the rear floor connected to the bottom of the rear floor frame, sill beams on the left and right sides, and torsion boxes connected to the rear ends of the longitudinal beams of the front engine compartment on the left and right sides respectively.

[0007] The rear ends of the longitudinal beams on both sides of the front floor are connected to the rear floor frame, and the front ends of the longitudinal beams on both sides of the front floor are connected to the lower crossbeam of the front enclosure through the front enclosure longitudinal beam. The rear floor frame, the lower crossbeam of the front enclosure, and the longitudinal beams on both sides of the front floor and the front enclosure longitudinal beam are connected to form a first ring-shaped reinforcing structure.

[0008] The left and right sides of the lower rear floor crossbeam are respectively connected to the rear end of the corresponding side sill beam. The torsion box on each side is connected to the front end of the sill beam on the same side. The rear section crossbeam of the cabin is connected between the torsion boxes on both sides. The lower rear floor crossbeam, the rear section crossbeam of the cabin, the sill beams on both sides and the torsion box are connected to form a second ring reinforcement structure.

[0009] Furthermore, the rear floor frame has rear floor longitudinal beams disposed on the left and right sides, and each rear floor longitudinal beam is provided with a reinforcing sealing plate. Both reinforcing sealing plates extend along the front-rear direction of the vehicle, and the front end of each reinforcing sealing plate extends from the front end of the rear floor longitudinal beam on the same side.

[0010] The rear ends of the longitudinal beams on the front floor on each side are connected to the rear floor frame via the reinforcing sealing plate on the same side.

[0011] Furthermore, each of the reinforcing sealing plates is separated into an upper cavity and a lower cavity located above and below the reinforcing sealing plate within the longitudinal beam of the rear floor on the same side; the rear end of each of the reinforcing sealing plates is correspondingly arranged with the front mounting part of the rear subframe within the longitudinal beam of the rear floor on the same side.

[0012] Furthermore, the top of the rear floor longitudinal beam is covered with a longitudinal beam cover plate; the lower cavity is formed between the rear floor longitudinal beam and the reinforcing sealing plate, and the upper cavity is formed between the rear floor longitudinal beam, the reinforcing sealing plate, and the longitudinal beam cover plate.

[0013] Furthermore, the front mounting part of the rear subframe includes a threaded connector disposed in the lower cavity of the longitudinal beam; the threaded connector is integrally formed and has a support plate connected to the rear floor longitudinal beam, and a threaded sleeve connected to the support plate at one end; the threaded sleeve is provided with a threaded connection hole, the threaded connection hole is disposed through the support plate, and the bottom of the rear floor longitudinal beam is provided with a connection through hole corresponding to the threaded connection hole.

[0014] Furthermore, the end of the threaded sleeve away from the base plate passes through the reinforcing sealing plate and extends into the upper cavity of the longitudinal beam; the distance between the end of the threaded sleeve extending into the upper cavity of the longitudinal beam and the reinforcing sealing plate is within 10mm, and the threaded sleeve is connected to the reinforcing sealing plate.

[0015] Furthermore, the portion of the reinforcing sealing plate into the upper cavity of the longitudinal beam is provided with reinforcing ribs; the reinforcing ribs include annular reinforcing ribs and multiple linear reinforcing ribs connected to the annular reinforcing ribs; the annular reinforcing ribs are arranged around the threaded sleeve, and the multiple linear reinforcing ribs are arranged radially around the annular reinforcing ribs.

[0016] Furthermore, the front mounting portion of the rear subframe also includes a side reinforcing plate located within the lower cavity of the longitudinal beam. The side reinforcing plate is connected to the rear floor longitudinal beam, and is arranged side-by-side on one side of the threaded sleeve, which is connected to the side reinforcing plate; and / or,

[0017] The support plate is spot-welded to the rear floor longitudinal beam, and the bolted parts are integrally stamped.

[0018] Furthermore, the rear floor skeleton further has a rear floor middle cross member connected between the rear floor longitudinal beams on both sides. The lower rear floor cross member is in a "C" shape with an opening facing forward; each side of the rear floor longitudinal beam is connected to the rear end of the same side sill beam, and the lower rear floor cross member is connected between the front sections of the rear floor longitudinal beams on both sides and the rear floor middle cross member.

[0019] Furthermore, the rear floor skeleton further has a front rear floor cross member and a rear rear floor cross member connected between the rear floor longitudinal beams on both sides; the front rear floor cross member is connected between the front sections of the rear floor longitudinal beams on both sides, the rear rear floor cross member is connected between the rear sections of the rear floor longitudinal beams on both sides, and the rear floor middle cross member is connected in the transition area between the front and rear sections of each side of the rear floor longitudinal beam;

[0020] A ring structure is formed by connecting between the front rear floor cross member, the rear floor middle cross member and the rear floor longitudinal beams on both sides, and a ring structure is formed by connecting between the rear rear floor cross member, the rear floor middle cross member and the rear floor longitudinal beams on both sides.

[0021] Furthermore, rear sill beams are provided at the rear ends of both sides of the sill beams. Each side of the rear sill beam is connected to the rear floor longitudinal beam; a longitudinal beam front section cavity is formed by enclosing between the front section on each side, the rear sill beam and the rear floor panel, and a lower cross member side cavity is formed by enclosing between the front section on each side, the rear sill beam and the lower rear floor cross member;

[0022] A middle cross member cavity is formed by enclosing between the rear floor middle cross member and the rear floor panel, and a lower cross member middle cavity is formed by enclosing between the lower rear floor cross member and the rear floor middle cross member; the longitudinal beam front section cavity and the lower cross member side cavity are stacked in the up-down direction of the whole vehicle, and the middle cross member cavity and the lower cross member middle cavity are stacked in the up-down direction of the whole vehicle.

[0023] Furthermore, it further includes a front row seat mounting cross member connected between the sill beams on both sides, and a middle channel extending in the front-rear direction of the whole vehicle; the front row seat mounting cross member penetrates from one side of the sill beam to the other side of the sill beam, the front end of the middle channel is connected to the lower front cross member, and the rear end of the middle channel is connected to the front row seat mounting cross member.

[0024] Furthermore, the front row seat mounting cross member includes a cross member body, and connecting beams connected to the left and right ends of the cross member body. The cross member body is formed by roll forming, and the cross member body has a plurality of cross member main bodies connected in sequence in the front-rear direction of the whole vehicle. The cross section of each cross member main body is in a "U" shape; and / or,

[0025] The middle channel has a plurality of middle channel bodies connected in sequence in the left-right direction of the whole vehicle, and the cross-section of each middle channel body is in a "Ji" shape.

[0026] Furthermore, mounting through holes for battery pack installation are provided on both sides of the sill beams, and nut plates corresponding to the mounting through holes; the mounting through holes are long holes extending in the left-right direction of the whole vehicle, the nut plate has a bottom plate and welding nuts provided on the bottom plate, and the battery pack is connected to the welding nuts through connecting bolts passing through the mounting through holes;

[0027] A crush plate is connected to the bottom plate through a deformable connecting portion, the welding nuts are connected to the crush plate, and when the connecting portion is deformed, the welding nuts can move relative to the bottom plate along the length direction of the mounting through hole.

[0028] Furthermore, through holes are provided on the bottom plate, the crush plate is located in the through holes, and among the two ends of the crush plate in the length direction of the mounting through hole, one end is connected to the bottom plate through the connecting portion, and a deformation space is formed between the other end and the inner wall of the notch; and / or,

[0029] The connecting portion adopts a bent connecting plate.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The body strengthening structure of the present invention enables the rear floor skeleton to be connected to the rear end of the front floor upper longitudinal beam, the front end of the front floor upper longitudinal beam is connected to the front lower cross beam through the front surround longitudinal beam, and at the same time enables the rear floor skeleton, the front lower cross beam, and the front floor upper longitudinal beams and front surround longitudinal beams on both sides to be connected to form a first annular strengthening structure, and by providing the rear floor lower cross beam, enables the torsion boxes on both sides to be connected through the rear section of the engine compartment cross beam, and at the same time enables the rear floor lower cross beam, the rear section of the engine compartment cross beam, and the sill beams and torsion boxes on both sides to be connected to form a second annular strengthening structure.

[0032] Thereby, the present invention can not only utilize the characteristics of the large strength of the annular structure to increase the structural strength and torsional stiffness of the body, improve the structural strength and torsional stiffness of the bottom of the body, but also can utilize the annular structure to form two upper and lower annular force transmission channels in the body, which helps to transmit and disperse the collision force in the body, and is beneficial to improving the safety of the whole vehicle.

[0033] Furthermore, the reinforced endplate increases the structural strength of the rear floor longitudinal beam and facilitates the connection between the front floor longitudinal beam and the rear floor frame. The reinforced endplate separates the rear floor longitudinal beam into upper and lower cavities, and its rear end aligns with the front mounting point of the rear subframe. This dual-cavity structure not only increases the structural strength of the rear floor longitudinal beam and enhances its impact force transmission capacity, but also improves the dynamic stiffness of the rear subframe mounting point, thus improving the torsional performance of the rear of the vehicle. The longitudinal beam cover plate on top of the rear floor longitudinal beam enhances the structural performance of the rear floor longitudinal beam area and facilitates the molding of the upper cavity.

[0034] This one-piece molding of the bolted connector eliminates the need for welding between the support plate and the bolt sleeve, preventing rust at the connection point and improving the overall rust resistance of the bolted connector. The one-piece molding also ensures the structural strength of the bolted connector itself, contributing to improved reliability of the subframe installation. One end of the bolt sleeve passes through and connects to the reinforcing plate, which increases the stability of the bolted connector installation and enhances the rigidity of the front mounting point on the rear subframe. The distance between the reinforcing plate and the end of the bolt sleeve is within 10mm, increasing the height of the lower cavity along the bolt sleeve's axial direction, which helps increase the cross-sectional dimensions of the lower cavity and improves the overall structural strength of the rear floor longitudinal beam after the reinforcing plate is installed.

[0035] Secondly, the addition of reinforcing ribs increases the rigidity of the bolt sleeve by strengthening the sealing plate structure, thereby improving the stability of the subframe installation. The reinforcing ribs consist of annular reinforcing ribs and radially arranged linear reinforcing ribs, enhancing the bolt sleeve's resistance to deformation in the central position and further increasing the overall rigidity of the bolted connection. By adding side reinforcing plates, the strength of the lower cavity structure is increased, improving the overall strength of the bolted connection location and enhancing the reliability of the rear subframe installation.

[0036] The support plate is spot-welded to the rear floor longitudinal beam, which reduces damage to both the support plate and the rear floor longitudinal beam, avoids the ablation failure caused by MIG welding, improves the torsional resistance of the bolted connection, and ensures the reliability of the bolted connection within the rear floor longitudinal beam. The bolted connection is formed using a one-piece stamping method, ensuring its structural strength and toughness, and increasing the reliability of the bolted connection structure.

[0037] Furthermore, the lower crossbeam of the rear floor connects the front sections of the longitudinal beams on both sides of the rear floor and the middle crossbeam of the rear floor, which increases the strength and rigidity of the front part of the rear floor assembly, improves the stability of the battery pack rear or fuel tank installation, and also increases the structural strength of the rear floor frame. By setting up a front and rear crossbeam of the rear floor, and connecting the front and middle crossbeams with the longitudinal beams on both sides of the rear floor, as well as the rear and middle crossbeams with the longitudinal beams on both sides of the rear floor, to form a ring structure, the high strength of the ring structure can be utilized to further enhance the structural strength of the rear floor frame.

[0038] By forming stacked longitudinal beam front cavities and lower crossbeam side cavities, as well as stacked middle crossbeam cavities and lower crossbeam central cavities, a dual-cavity structure can be used to increase the structural strength of the front sides and the middle of the front of the rear floor assembly. This also improves the dynamic stiffness of the front mounting point of the rear subframe and enhances the rear-end collision performance. The front seat mounting crossbeam has a continuous structure, ensuring the continuity of the force transmission channel formed by the front seat mounting crossbeam, which is beneficial for improving side-impact force transmission capabilities.

[0039] Furthermore, using a roll forming process for the crossbeam body, and constructing it from multiple crossbeam bodies with a Z-shaped cross-section, increases the structural strength of the crossbeam body itself. Similarly, constructing the central channel from sequentially connected central channel bodies with a Z-shaped cross-section creates a wave-like structure, increasing the cross-sectional area and structural strength of the central channel, thus enhancing its collision force transmission performance.

[0040] The battery pack mounting point at the sill beam consists of a long, narrow mounting hole and a nut plate with a base plate and a welded nut. The welded nut can move relative to the base plate along the length of the mounting hole, enabling collapsible displacement of the battery pack mounting point in the event of a side impact. This helps reduce the impact on the battery pack and improves its safety. A collapsible plate is located within a through hole in the base plate, with one end connected to the base plate via a connector, and the other end forming a deformation space. This simplifies the nut plate structure and limits the movement distance of the welded nut, ensuring effective use when the nut plate collapses. The connector uses a curved connecting plate, which is simple in structure, easy to manufacture, and provides good collapsible deformation.

[0041] Another object of the present invention is to provide a vehicle having the body reinforcement structure described above.

[0042] The vehicle described in this invention has the same beneficial effects as the aforementioned vehicle body reinforcement structure, and will not be repeated here. Attached Figure Description

[0043] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0044] Figure 1 This is a schematic diagram of the vehicle body structure described in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram showing the connection between the reinforcing sealing plate, the longitudinal beam on the front floor, and the longitudinal beam in the front engine compartment as described in an embodiment of the present invention.

[0046] Figure 3 This is a schematic diagram of the vehicle body structure from the bottom view according to an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the rear floor assembly according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the rear floor frame according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram illustrating the installation of the reinforcing sealing plate within the rear floor longitudinal beam according to an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram illustrating the arrangement of the front mounting portion of the rear subframe within the rear floor longitudinal beam, as described in an embodiment of the present invention.

[0051] Figure 8 for Figure 7 A magnified view of part A in the middle;

[0052] Figure 9 This is a schematic diagram of the threaded sleeve through-reinforced sealing plate configuration according to an embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram showing the relative arrangement of the reinforcing sealing plate, screw connector, and side reinforcing plate according to an embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the structure of the screw connector according to an embodiment of the present invention;

[0055] Figure 12 This is a schematic diagram of the side reinforcing plate according to an embodiment of the present invention;

[0056] Figure 13 This is a schematic diagram showing the connection between the screw connector and the side reinforcing plate according to an embodiment of the present invention;

[0057] Figure 14 for Figure 13 A schematic diagram of the structure shown from another perspective;

[0058] Figure 15 This is a schematic diagram of the structure of the reinforcing sealing plate according to an embodiment of the present invention;

[0059] Figure 16 This is a schematic diagram of the collision force transmission of the first annular reinforcing structure described in an embodiment of the present invention during a head-on collision;

[0060] Figure 17 This is a schematic diagram illustrating the fit between the lower crossbeam of the rear floor and the rear floor frame as described in an embodiment of the present invention.

[0061] Figure 18 This is a schematic diagram of the structure of the lower crossbeam of the rear floor as described in an embodiment of the present invention;

[0062] Figure 19 This is a schematic diagram illustrating the structure of the front section cavity of the longitudinal beam and the side cavity of the lower crossbeam according to an embodiment of the present invention;

[0063] Figure 20 This is a schematic diagram illustrating the structure of the middle crossbeam cavity and the middle cavity of the lower crossbeam according to an embodiment of the present invention;

[0064] Figure 21 This is a schematic diagram of the central channel arrangement as described in an embodiment of the present invention;

[0065] Figure 22 This is a schematic diagram of the front seat mounting beam according to an embodiment of the present invention;

[0066] Figure 23 This is a schematic diagram of the structure of the beam body according to an embodiment of the present invention;

[0067] Figure 24 for Figure 17 A magnified view of part B in the middle section;

[0068] Figure 25 This is a schematic diagram of the nut plate according to an embodiment of the present invention;

[0069] Figure 26 This is a schematic diagram of the structure of the base plate according to an embodiment of the present invention;

[0070] Figure 27 This is a schematic diagram of the collision force transmission of the second annular reinforcing structure described in an embodiment of the present invention during a head-on collision;

[0071] Explanation of reference numerals in the attached figures:

[0072] 1. Rear floor assembly; 2. Sill beam; 3. Front floor panel; 4. Front engine compartment longitudinal beam; 5. Front seat mounting crossbeam; 6. Lower rear floor crossbeam; 7. Torque box; 8. Rear engine compartment crossbeam; 9. Nut plate; 10. Front floor longitudinal beam; 11. Front bulkhead longitudinal beam; 12. Front bulkhead panel; 13. Lower front bulkhead panel; 14. Lower front bulkhead crossbeam; 15. Reinforcing panel; 16. Screw fasteners; 17. Side reinforcing plates; 18. Center tunnel;

[0073] 100. Rear floor frame; 200. Rear floor panel; 300. Rear floor front crossbeam reinforcement plate; 200a. Longitudinal beam cover plate; 101. Rear floor longitudinal beam; 101a. Front section; 101b. Rear section; 102. Rear floor middle crossbeam; 103. Rear floor front crossbeam; 104. Rear floor rear crossbeam; 2a. Rear sill beam; 2b. Mounting through hole; 501. Front mounting crossbeam; 502. Rear mounting crossbeam; 5a. Crossbeam body; 5b. Connecting beam; 5c. Crossbeam main body; 6a. Lower 6b. Side of the lower crossbeam; 901. Middle of the lower crossbeam; 901. Base plate; 901a. Collapsed plate; 901b. Connecting part; 901c. Through hole; 902. Welded nut; 1601. Support plate; 1602. Screw sleeve; 1603. Threaded connection hole; 1604. Notch; 1501. Annular reinforcing rib; 1502. Linear reinforcing rib; 1503. Through hole; 1504. Strip reinforcing rib; 1701. Connecting flange; 1702. Groove; 18a. Main body of the central channel;

[0074] M, upper cavity; N, lower cavity; S, upper longitudinal beam cavity; Q, front longitudinal beam cavity; G, front section of longitudinal beam cavity; H, side cavity of lower crossbeam; E, middle crossbeam cavity; F, middle cavity of lower crossbeam; k, crushing deformation zone. Detailed Implementation

[0075] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0076] In the description of this invention, it should be noted that the use of terms such as "upper," "lower," "inner," and "outer," indicating orientation or positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the use of terms such as "first" and "second" is also for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0077] Furthermore, in the description of this invention, unless otherwise explicitly specified, the connecting structures between mating components can be conventional in the art. Moreover, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0078] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0079] Example 1

[0080] This embodiment relates to a vehicle body reinforcement structure, combined with... Figures 1 to 3 As shown, it includes a rear floor frame 100 in the rear floor assembly 1, longitudinal beams 10 on the front floor on the left and right sides, and a lower crossbeam 14 on the front bulkhead. It also includes a lower crossbeam 6 on the rear floor connected to the bottom of the rear floor frame 100, sill beams 2 on the left and right sides, and torsion boxes 7 connected to the rear ends of the longitudinal beams 4 on the left and right sides of the front cabin respectively.

[0081] The rear ends of the longitudinal beams 10 on both sides of the front floor are connected to the rear floor frame 100, and the front ends of the longitudinal beams 10 on both sides of the front floor are connected to the lower front crossbeam 14 through the front longitudinal beam 11. At the same time, the rear floor frame 100, the lower front crossbeam 14, and the longitudinal beams 10 and 11 on both sides of the front floor are also connected to form the first annular reinforcing structure.

[0082] Then, the left and right sides of the lower floor beam 6 are connected to the rear end of the corresponding side sill beam 2, and the torsion boxes 7 on each side are connected to the front end of the sill beam 2 on the same side. The rear section beam 8 of the cabin is connected between the torsion boxes 7 on both sides. The lower floor beam 6, the rear section beam 8 of the cabin, and the sill beams 2 and torsion boxes 7 on both sides are also connected to form a second ring reinforcement structure.

[0083] At this point, the above structural design connects the rear floor frame 100 to the rear end of the front floor longitudinal beam 10, and the front end of the front floor longitudinal beam 10 is connected to the front lower crossbeam 14 via the front longitudinal beam 11. The rear floor frame 100, the front lower crossbeam 14, and the front floor longitudinal beams 10 and front longitudinal beams 11 on both sides are connected to form a first annular reinforcement structure. Furthermore, by setting the rear floor lower crossbeam 6, the torsion boxes 7 on both sides are connected via the rear section crossbeam 8 of the cabin. At the same time, the rear floor lower crossbeam 6, the rear section crossbeam 8 of the cabin, and the sill beams 2 and torsion boxes 7 on both sides are connected to form a second annular reinforcement structure.

[0084] This embodiment not only utilizes the high strength of the ring structure to increase the structural strength and torsional stiffness of the vehicle body, and improves the structural strength and torsional stiffness of the bottom of the vehicle body, but also utilizes the ring structure to form two ring-shaped force transmission channels in the vehicle body, which is beneficial to the transmission and dispersion of collision forces in the vehicle body.

[0085] Specifically, continue to be by Figures 4 to 6 and combined Figure 16 As shown, in a preferred embodiment, the rear floor frame 100 of this embodiment has rear floor longitudinal beams 101 disposed on the left and right sides, and each rear floor longitudinal beam 101 is provided with a reinforcing sealing plate 15. Both reinforcing sealing plates 15 extend along the front-rear direction of the vehicle, and the front end of each reinforcing sealing plate 15 extends from the front end of the rear floor longitudinal beam 101 on the same side.

[0086] Thus, based on the aforementioned reinforcement plate 15, in this embodiment, the rear end of the longitudinal beam 10 on each side of the front floor is specifically connected to the front end of the reinforcement plate 15 on the same side, thereby enabling the rear end of the longitudinal beam 10 on each side of the front floor to be connected to the rear floor frame 100 through the reinforcement plate 15 on the same side. Moreover, it can be understood that the reinforcement plate 15 also increases the structural strength of the rear floor longitudinal beam 101 and facilitates the connection between the longitudinal beam 10 on the front floor and the rear floor frame 100.

[0087] In a preferred embodiment, in addition to the reinforcing sealing plate 15, each reinforcing sealing plate 15 is also divided within the rear floor longitudinal beam 1 on the same side into an upper cavity M and a lower cavity N located above and below the reinforcing sealing plate 15, respectively. Simultaneously, the rear ends of each reinforcing sealing plate 15 are correspondingly positioned with the front mounting portion of the rear subframe within the rear floor longitudinal beam 101 on the same side.

[0088] This design allows the reinforcing plate 15 to separate an upper cavity M and a lower cavity N within the rear floor longitudinal beam 101, and ensures that the rear end of the reinforcing plate 15 corresponds to the front mounting portion of the rear subframe. On one hand, the resulting dual-cavity structure increases the structural strength of the rear floor longitudinal beam 101, enhancing its impact force transmission capability. On the other hand, it also improves the dynamic stiffness of the rear subframe mounting point, which is beneficial for enhancing the overall vehicle handling and comfort.

[0089] In this embodiment, the front floor longitudinal beam 10 is located above the front floor panel 3 and extends along the longitudinal direction of the vehicle. The front bulkhead longitudinal beam 11 is connected above the front bulkhead lower panel 13, and the front bulkhead lower panel 13 is connected between the front bulkhead panel 12 and the front floor panel 3. In addition, the rear end of the front engine compartment longitudinal beam 4 and the front end of the front bulkhead longitudinal beam 11 are respectively located on the front and rear sides of the front bulkhead panel 12, so that the front bulkhead longitudinal beam 11 and the front engine compartment longitudinal beam 4 are connected in the longitudinal direction of the vehicle.

[0090] It is understandable that by strengthening the connection between the sealing plate 15, the longitudinal beam 10 on the front floor, the longitudinal beam 11 of the front bulkhead, and the longitudinal beam 3 of the front engine compartment, a continuous force transmission channel can be formed in the front-rear direction of the vehicle. In this way, it can be combined with the force transmission channel formed by the sill beam 2 to form a dual-channel force transmission structure in the vehicle body, which is conducive to the transmission and dispersion of collision force in the vehicle body.

[0091] In addition, it should be noted that the connection between the aforementioned front bulkhead longitudinal beam 11 and the front engine compartment longitudinal beam 4 is such that their projections in the longitudinal direction of the vehicle overlap at least partially. In this way, a reliable force transmission channel can be formed between the front engine compartment longitudinal beam 4 and the front bulkhead longitudinal beam 11, so that the collision force can be transmitted along the longitudinal direction of the vehicle using this new force transmission channel.

[0092] In this embodiment, based on the provision of the front floor longitudinal beam 10 and the front bulge longitudinal beam 11, the following is still referred to Figure 16 As shown, in a preferred embodiment, an upper longitudinal beam cavity S is formed between the front floor longitudinal beam 10 and the front floor panel 3, and a front bulkhead longitudinal beam cavity Q is formed between the front bulkhead longitudinal beam 11 and the front bulkhead lower panel 13. Furthermore, the front end of the upper longitudinal beam cavity S communicates with the front bulkhead longitudinal beam cavity Q, and the rear end of the upper longitudinal beam cavity S communicates with the lower cavity N.

[0093] At this point, by setting up the upper longitudinal beam cavity S and the front longitudinal beam cavity Q, the structural strength of the front floor longitudinal beam 10 and the front longitudinal beam 11 can be improved by taking advantage of the high structural strength of the cavity. The upper longitudinal beam cavity S is connected to the front longitudinal beam cavity Q and the lower cavity N, which can also improve the continuity of the longitudinal (vehicle front-rear direction) force transmission channel formed by the front longitudinal beam 11, the front floor longitudinal beam 10 and the rear floor longitudinal beam 101, which is also conducive to improving the collision force transmission effect.

[0094] In a preferred embodiment, both rear floor longitudinal beams 101 are integrally formed within the rear floor frame 100, and each rear floor longitudinal beam 101 is covered with a longitudinal beam cover plate 200a. The rear floor longitudinal beams 101 and the reinforcing sealing plate 15 form a lower cavity N, while the rear floor longitudinal beams 101, the reinforcing sealing plate 15, and the longitudinal beam cover plate 200a form an upper cavity M. Furthermore, by covering the rear floor longitudinal beams 101 with the longitudinal beam cover plate 200a, the structural performance of the rear floor longitudinal beams 101 is improved, and the forming of the upper cavity M is facilitated.

[0095] In this embodiment, as a preferred implementation, the rear floor frame 100 is further formed with a front rear floor crossbeam 103, a middle rear floor crossbeam 102, and a rear rear floor crossbeam 104 connecting the two rear floor longitudinal beams 101. Furthermore, it should be noted that the rear floor frame 100 of this embodiment can, for example, employ a conventional sheet metal welded structure; however, as a preferred implementation, combined with… Figure 5 and Figure 6 As shown, the rear floor frame 100 in this embodiment can be manufactured using an integral thermoforming process. This allows the rear floor frame 100 to be integrally thermoformed, which facilitates the molding of the rear floor frame 100 and also ensures the structural strength of the rear floor frame 100.

[0096] One-piece thermoforming is a forming process frequently used in current car body manufacturing. It typically involves heating a steel sheet to uniformly austenitize it, then feeding it into a mold with an internal cooling system for stamping. Finally, through cooling, the austenite is transformed into martensite, etc., completing the forming process. Through the above forming process, the prepared car body parts can be hardened, thereby significantly improving their strength.

[0097] Specifically, in practical implementation, a preferred method is to use laser welding thermoforming, which involves using laser welding technology to join sheets of different materials, thicknesses, and coatings together and weld them into a single sheet before the hot stamping process. This single sheet is then hot stamped to produce the rear floor frame 100. Laser welding can address the performance requirements of ultra-wide panels and different parts of the rear floor frame 100, resulting in significant improvements in vehicle weight reduction, overall vehicle cost reduction, energy conservation, and environmental protection.

[0098] In this embodiment, the longitudinal beam cover plate 200a covering the top of the rear floor longitudinal beam 101 is specifically a part of the rear floor panel assembly. Typically, the longitudinal beam cover plates 200a at both rear floor longitudinal beams 1 and the middle rear floor panel 200 together form the rear floor panel assembly. The rear floor panel assembly, the aforementioned rear floor frame 100, and the rear sill beams 2a connected to the outer front sections of the rear floor longitudinal beams 101 on both sides can be combined to form the rear floor assembly in the vehicle body.

[0099] In addition, as a preferred structural form, continuing as... Figures 7 to 14 As shown, the front mounting part of the rear subframe in this embodiment includes a bolted member 16 disposed in the longitudinal beam 101 of the rear floor, and the bolted member 16 is specifically located in the lower cavity N.

[0100] In terms of specific structure, the aforementioned screw connector 16 is integrally formed and has a support plate 1601 and a screw sleeve 1602 connected to the support plate 1601 at one end. The support plate 1601 is connected to the rear floor longitudinal beam 101, and the screw sleeve 1602 is provided with a threaded connection hole 1603, which penetrates through the support plate 1601. At the same time, a connection through hole corresponding to the threaded connection hole 1603 is also provided at the bottom of the rear floor longitudinal beam 101.

[0101] Understandably, by integrally molding the screw connector 16, there is no welded connection between the support plate 1601 and the screw sleeve 1602 in the screw connector 16. This prevents rust from occurring at the connection point and improves the overall rust resistance of the screw connector 16. Furthermore, the integral molding of the screw connector 16 also ensures its structural strength, which helps to improve its reliability in use.

[0102] In this embodiment, as a preferred implementation, the threaded connector 16 can be integrally stamped during manufacturing. Furthermore, in terms of specific configuration, the support plate 1601 can, for example, extend along the length of the rear floor longitudinal beam 101, with the bottom end of the threaded sleeve 1602 connected to the middle of the support plate 1601. Here, using an integral stamping method to form the threaded connector 16 ensures the structural strength and toughness of the threaded connector 16, increasing the reliability of the structure. Moreover, in terms of the specific forming process, after the threaded connector 16 is stamped through multiple processes, the threaded connection hole 1603 can be machined using a tapping machine.

[0103] Furthermore, in specific implementations, the thickness of the threaded connector 16 can range from 2.5 to 3 mm. For example, the thickness of the support plate 1301 in the threaded connector 16 can be 2.5 mm, 2.8 mm, or 3 mm. Meanwhile, the threaded connector 16 is preferably made of DC series steel or high-strength steel. When high-strength steel is used, the strength of the material is generally below 1000 MPa to avoid difficulties in forming the threaded connector 16 due to excessive strength, and to prevent the threaded sleeve 1602 from becoming too brittle and easily breaking.

[0104] As a preferred connection method, the support plate 1601 in this embodiment can be spot-welded to the rear floor longitudinal beam 101. In this case, spot welding the support plate 1601 to the rear floor longitudinal beam 101 reduces damage to both the support plate 1601 and the rear floor longitudinal beam 101, avoids the ablation failure caused by MIG welding in the prior art, improves the torsional resistance of the bolted connector 16 after connection, and ensures the reliability of the bolted connector 16 within the rear floor longitudinal beam 101.

[0105] To further improve the spot welding effect between the support plate 1601 and the rear floor longitudinal beam 101, this embodiment can also provide a U-shaped notch 1604 at one edge of the support plate 1601 to increase the number of weld points, thereby improving the welding strength between the support plate 1601 and the rear floor longitudinal beam 101. Of course, depending on specific usage requirements, the notch 1604 can also be set in other positions and in other shapes.

[0106] In this embodiment, as a preferred implementation, the end of the threaded sleeve 1602 away from the support plate 1601 also penetrates the reinforcing sealing plate 15 and extends into the upper cavity M of the longitudinal beam, and the threaded sleeve 1602 is also connected to the reinforcing sealing plate 15. In this case, having one end of the threaded sleeve 1602 penetrate the reinforcing sealing plate 15 and connect to it increases the stability of the threaded connection 16 by utilizing the reinforcing sealing plate 15, which helps to improve the rigidity of the front mounting part of the rear subframe.

[0107] In a practical implementation, as an example arrangement, the distance between the end of the threaded sleeve 1602 that extends into the upper cavity M and the reinforcing sealing plate 15 can be set within 10mm. This arrangement increases the height of the cavity along the axial direction of the threaded sleeve 1602, which helps to increase the cross-sectional dimensions of the lower cavity N and improves the overall structural strength of the rear floor longitudinal beam 101 after the reinforcing sealing plate 15 is installed.

[0108] In this embodiment, we continue to combine Figure 9 and Figure 15 As shown, in a preferred structural form, the portion of the threaded sleeve 1602 of the reinforcing sealing plate 15 that extends into the upper cavity M is also provided with reinforcing ribs. In this case, in a specific structure, the aforementioned reinforcing ribs include annular reinforcing ribs 1501 and a plurality of linear reinforcing ribs 1502 connected to the annular reinforcing ribs 1501.

[0109] The reinforcing sealing plate 15 has a through hole 1503 for the end of the threaded sleeve 1602 to pass through. An annular reinforcing rib 1501 is formed on the edge of the through hole 1503 and surrounds the threaded sleeve 1602. Multiple linear reinforcing ribs 1502 are arranged radially around the annular reinforcing rib 1501. Furthermore, the number of linear reinforcing ribs 1502 can be set to... Figure 9 and Figure 15 The quantities shown, and except for Figure 9 and Figure 15 In addition to the quantities shown, the quantities can be determined based on usage requirements.

[0110] In this embodiment, it is understood that the reinforcing ribs are composed of annular reinforcing ribs 1501 and radially arranged linear reinforcing ribs 1502, which can improve the deformation resistance of the threaded sleeve 1602 located in the middle position, further increase the overall rigidity of the threaded connector 16, reduce the deformation of the threaded sleeve 1602 during the movement, and thus improve the reliability of the threaded connector 16.

[0111] In addition to the aforementioned reinforcing ribs, as a preferred embodiment, this embodiment also provides a plurality of strip-shaped reinforcing ribs 1504 extending along the length of the reinforcing sealing plate 15, one of which extends to connect with a corresponding linear reinforcing rib 1502. These strip-shaped reinforcing ribs 1504 strengthen the structure of the reinforcing sealing plate 15 and are simple in structure and easy to process and form.

[0112] To further enhance the strength of the front mounting point of the rear subframe, as a preferred embodiment, the front mounting portion of the rear subframe in this embodiment also includes a side reinforcing plate 17 located within the lower cavity N. At least one side of the side reinforcing plate 17 is connected to the rear floor longitudinal beam 101, and the side reinforcing plate 17 is arranged side-by-side on one side of the threaded sleeve 1602, which is also connected to the side reinforcing plate 17. Here, by providing the side reinforcing plate 17, the strength of the lower cavity N can be increased, improving the overall strength of the location of the bolted component, and contributing to improved reliability of the rear subframe mounting.

[0113] In terms of specific structure, the aforementioned side reinforcing plate 17 extends along the width direction of the rear floor longitudinal beam 101 and can be located on the front or rear side of the threaded sleeve 1602. Furthermore, this embodiment also provides a connecting flange 1701 on the side reinforcing plate 17, allowing the side reinforcing plate 17 to be connected to the rear floor longitudinal beam 101. This connection between the side reinforcing plate 17 and the rear floor longitudinal beam 101 via the connecting flange 1701 not only increases the structural strength of the side reinforcing plate 17 itself but also improves the reliability of the connection between the side reinforcing plate 17 and the rear floor longitudinal beam 101.

[0114] As one example of the arrangement of the connecting flange 1701, in this embodiment, the connecting flange 1701 can be arranged, for example, at the bottom and both sides of the side reinforcing plate 17. The connecting flange 1701 located on one side is used to connect with the reinforcing sealing plate 15. The connecting flange 1701 located at the bottom is located on a portion of the support plate 1601 and is welded to both the support plate 1601 and the rear floor longitudinal beam 101. Of course, in specific implementations, the position and number of the connecting flanges 1701 can be adjusted according to connection requirements.

[0115] Furthermore, as a preferred embodiment, this embodiment also forms a groove 1702 on the side reinforcing plate 17, and the threaded sleeve 1602 is connected within this groove 1702. The groove 1702 conforms to the shape of the threaded sleeve 1602, and for example, the groove 1702 is arc-shaped, matching the outer peripheral wall of the threaded sleeve 1602. This arrangement allows the side reinforcing plate 17 to fit snugly against the threaded sleeve 1602, facilitating the connection between them and ensuring the stability of the connection between the threaded sleeve 1602 and the side reinforcing plate 17. Simultaneously, the groove 1702 also provides positioning for the installation of the side reinforcing plate 17.

[0116] In this embodiment, the side reinforcing plate 17 is preferably connected to the bolted parts and the rear floor longitudinal beam 101 by MIG welding to further improve the connection strength.

[0117] In a preferred embodiment, the torque boxes 7 on both sides are in a "V" shape. The front end of each torque box 7 is connected to the bottom of the rear end of the longitudinal beam 4 of the front engine compartment on the same side. One side of the rear end of each torque box 7 is connected to the front end of the sill beam 2, and the other side is connected to the rear crossbeam 8 of the engine compartment. In specific implementation, the torque box 7 can adopt a conventional structure from existing vehicle models, and it is usually connected to the longitudinal beam 4 of the front engine compartment, the sill beam 2, and the rear crossbeam 8 of the engine compartment by welding.

[0118] The aforementioned rear crossbeam 8 of the engine compartment is specifically connected to the front end of the front floor panel 3 and located at the bottom of the front floor panel 3. The rear crossbeam 8 also spans the central tunnel 18 at the bottom to connect the torsion boxes 7 on both sides. In specific implementation, the rear crossbeam 8 of the engine compartment in this embodiment can adopt a beam structure commonly found in existing vehicle models. For example, it can be a sheet metal welded structure or made of extruded aluminum.

[0119] In addition, see also Figure 3 As shown, the lower crossbeam 6 of the rear floor in this embodiment is also specifically shaped like a "C" with the opening facing forward, and continues to be combined with Figure 17 As shown, based on the arrangement of the rear floor crossbeam 102 in the rear floor frame 100 described above, the lower rear floor crossbeam 6 is also specifically connected between the front section 101a of the two rear floor longitudinal beams 101 and the rear floor crossbeam 102. In this way, by connecting the lower rear floor crossbeam 6 between the front section 101a of the two rear floor longitudinal beams 101 and the rear floor crossbeam 102, the strength and rigidity of the front part of the rear floor assembly 1 can be increased, improving the stability of the battery pack rear end or fuel tank installation in the vehicle body. At the same time, it can also increase the structural strength of the rear floor frame 100, thereby helping to improve the overall torsional rigidity of the rear floor assembly 1.

[0120] In this embodiment, the aforementioned front crossbeam 103 of the rear floor is specifically connected between the front sections 101a of the longitudinal beams 101 of the two rear floors, and the front crossbeam 103, the middle crossbeam 102, and the longitudinal beams 101 of the two rear floors are connected to form a ring structure. In this way, by connecting the front crossbeam 103, the middle crossbeam 102, and the longitudinal beams 101 of the two rear floors to form a ring structure, the structural strength of the front part of the rear floor frame 100 can be improved by utilizing the high strength of the ring structure.

[0121] Furthermore, in this embodiment, the rear floor crossbeam 104 is connected between the rear sections 101b of the two rear floor longitudinal beams 101. At the same time, the aforementioned rear floor middle crossbeam 102 is also specifically connected to the transition area between the front section 101a and the rear section 101b of each side rear floor longitudinal beam 101, so that the rear floor front crossbeam 103 and the rear floor rear crossbeam 104 are respectively located on the front and rear sides of the rear floor middle crossbeam 102.

[0122] Similar to the front crossbeam 103 of the rear floor, in this embodiment, the rear crossbeam 104, the middle crossbeam 102, and the longitudinal beams 101 on both sides of the rear floor are also connected to form a ring structure. In this way, by connecting the rear crossbeam 104, the middle crossbeam 102, and the longitudinal beams 101 on both sides of the rear floor to form a ring structure, the rigidity of the rear floor frame 100 can be better improved by using a double ring structure based on the ring structure formed by the front crossbeam 103.

[0123] It should be noted that the longitudinal beam cover plate 200a covers the top of the rear floor longitudinal beam 101, thereby forming a longitudinal beam cavity within the rear floor longitudinal beam 101, thus improving the overall structural strength of the rear floor longitudinal beam 101. In this embodiment, based on the coverage of the rear floor panel 200, beam cavities can also be formed at the rear floor middle crossbeam 102 and the rear floor rear crossbeam 104 to improve the structural strength at the locations of the rear floor middle crossbeam 102 and the rear floor rear crossbeam 104.

[0124] At the rear floor front crossbeam 103, a rear floor front crossbeam reinforcement plate 300 can be further provided. The rear floor front crossbeam reinforcement plate 300 is connected between the rear sill beams 2a at the rear ends of the two side sill beams 2, and it, together with the rear floor front crossbeam 103, the rear floor panel 200, etc., also form a cavity structure to increase the structural strength at the rear floor front crossbeam 103.

[0125] Of course, when the rear floor front crossbeam reinforcement plate 300 is installed, the front ends of the reinforcing sealing plates 15 on both sides extend from the bottom of the rear floor front crossbeam reinforcement plate 300 and connect with the rear ends of the corresponding front floor longitudinal beam 10. Furthermore, by utilizing the connection between the rear floor front crossbeam reinforcement plate 300 and the side sill beams 2, a lateral (left-right direction of the whole vehicle) force transmission channel can also be formed that intersects with the front floor longitudinal beam 10, the reinforcing sealing plate 15, and the rear floor longitudinal beam 101, which helps to improve the dispersion effect of collision force in the vehicle body.

[0126] Furthermore, as a preferred embodiment, the front mounting portions of the rear subframe on each side are also located in the area where the rear floor longitudinal beam 101 intersects with the rear floor middle crossbeam 102. This location, with the front mounting portions of the rear subframe in the area where the rear floor longitudinal beam 101 intersects with the rear floor middle crossbeam 102, allows for increased rigidity of the front mounting point of the rear subframe via the rear floor middle crossbeam 102, thereby improving the reliability of the rear subframe mounting.

[0127] In this embodiment, as mentioned above, a rear sill beam 2a is provided at the rear end of each side sill beam 2, and each side sill beam 2 is connected to the rear floor longitudinal beam 101 on the same side through the rear sill beam 2a. Furthermore, the rear sill beam 2a, as the rear end part of the sill beam 2, mainly serves to connect with the rear floor longitudinal beam 101 and the C-pillar, etc. In terms of specific structure, the rear end of the rear sill beam 2a is also usually connected to the rear floor longitudinal beam 101, the longitudinal beam cover plate 200a, and the front end of the rear wheel arch, etc., to form a stable structure.

[0128] In this embodiment, each rear sill beam 2a is connected to the front section 101a of the rear floor longitudinal beam 101 on the same side, and the left and right sides of the lower rear floor crossbeam 6 are also connected to the corresponding rear sill beam 2a. Thus, it can be understood that by setting the rear sill beam 2a and connecting the lower rear floor crossbeam 6 to the rear sill beams 2a on both sides, a connection can be established between the lower rear floor crossbeam 6 and the sill beams on both sides of the vehicle body, thereby improving the setting effect of the lower rear floor crossbeam 6.

[0129] In this embodiment, the structure of the lower crossbeam 6 of the rear floor is as follows: Figure 18 As shown, for ease of description, the C-shaped lower crossbeam 6 of the rear floor can be divided into left and right side sections 6a and a middle section 6b. The side sections 6a are mainly connected to the front sections 101a of the rear floor longitudinal beams 101 on both sides, and to the rear door sill beams 2a on both sides. The middle section 6b is mainly connected to the middle crossbeam 102 of the rear floor.

[0130] To further enhance the structural strength of the front sides of the rear floor assembly 1, the following continues... Figure 19As shown in the diagram, taking one side as an example, in this embodiment, a longitudinal beam front section cavity G is also formed between the front section 101a, the rear sill beam 2a, and the rear floor panel 200 on each side. At the same time, a lower crossbeam side cavity H is formed between the front section 101a, the rear sill beam 2a, and the lower crossbeam 6 of the rear floor. The longitudinal beam front section cavity G and the lower crossbeam side cavity H are stacked in the vertical direction of the entire vehicle.

[0131] At this point, by forming the upper and lower stacked longitudinal beam front cavity G and the lower crossbeam side cavity H, the double cavity structure can be used to increase the structural strength of the front two sides of the rear floor assembly 1.

[0132] Based on the aforementioned longitudinal beam front cavity G and lower crossbeam side cavity H, this embodiment preferably continues as follows: Figure 20 As shown, a middle crossbeam cavity E is formed between the middle crossbeam 102 of the rear floor and the rear floor panel 200. At the same time, a lower crossbeam middle cavity F is formed between the lower crossbeam 6 of the rear floor and the middle crossbeam 102 of the rear floor. The middle crossbeam cavity E and the lower crossbeam middle cavity F are also stacked in the vertical direction of the whole vehicle.

[0133] In this way, by forming the middle crossbeam cavity E and the lower crossbeam middle cavity F, which are also stacked in the upper and lower layers, the structural strength of the front middle position of the rear floor assembly can be increased by utilizing the double cavity structure. At the same time, it can also cooperate with the double cavity structures on both sides to improve the dynamic stiffness of the front mounting point of the rear subframe and improve the collision performance of the rear of the vehicle.

[0134] In this embodiment, preferably, the vehicle involved is a new energy vehicle, thus including a battery pack in the vehicle body. Meanwhile, the front end of the battery pack can be connected to the rear crossbeam 8 of the engine compartment and the torsion boxes 7 on both sides, the left and right sides of the battery pack are respectively connected to the corresponding door sill beams 2, and the rear end of the battery pack can be connected to the lower crossbeam 6 of the rear floor.

[0135] Understandably, by connecting the battery pack to each beam and the torsion box 7 and installing it in the vehicle body, not only can the battery pack be installed and arranged in the vehicle body, but the reliability of the battery pack installation can also be improved by utilizing the ring structure formed by each beam and the torsion box 7.

[0136] In a further preferred embodiment where a battery pack is provided, for example, sealing rings may be provided between the top of the battery pack and the rear floor lower crossbeam 6, the rear section crossbeam 8 of the cabin, and the sill beams 2 and torsion box 7 on both sides. Furthermore, based on this, the top of the battery pack also forms the front floor panel 3 located between the sill beams 2 on both sides, and the front rear floor panel located in front of the rear floor lower crossbeam 6.

[0137] The aforementioned rear floor front panel, also known as the rear floor panel 200, is the portion located between the rear floor middle crossbeam 102 and the rear floor front crossbeam 103. Furthermore, by making the top of the battery pack form both the front floor panel 3 and the rear floor front panel, the existing front floor panel 2 and rear floor front panel can be eliminated, allowing the battery pack to be integrated with the vehicle body. This reduces the number of vehicle body parts and contributes to lightweight design and lower manufacturing costs. Of course, by installing sealing rings between the top of the battery pack and each beam and torsion box 7, the vehicle's interior sealing can be ensured when the top of the battery pack serves as both the front floor panel 3 and the rear floor front panel.

[0138] It should be noted that, in addition to using the top of the battery pack as both the front floor panel 3 and the front panel of the rear floor, in actual implementation, a front floor panel 2 and a front panel of the rear floor can also be provided in the vehicle body. Moreover, when the front panel of the rear floor is replaced by the top of the battery pack, the middle part of the rear floor panel 200 is only arranged at the position of the rear floor middle crossbeam 102, while the parts on both sides that serve as longitudinal beam cover plates 200a are still arranged at the front end of the rear floor longitudinal beam 101.

[0139] In this embodiment, it is still by Figure 1 and Figure 2 and combined Figure 21 As shown, a front seat mounting beam 5 is connected between the two side door sill beams 2, and the body reinforcement structure of this embodiment also includes a central channel 18 extending along the front-rear direction of the vehicle.

[0140] Specifically, the front seat mounting beam 5 includes a front mounting beam 501 and a rear mounting beam 502 spaced apart along the front-rear direction of the vehicle, and both the front mounting beam 501 and the rear mounting beam 502 are connected by a sill beam 2 on one side to a sill beam 2 on the other side. The front end of the center tunnel 18 is connected to the lower front fascia beam 14, and the rear end of the center tunnel 18 is connected to the front mounting beam 501 in the front seat mounting beam 5.

[0141] Understandably, making the front seat mounting beams 5 a through structure ensures the continuity of the force transmission channel formed by the front seat mounting beams 5, which is beneficial to improving the side impact force transmission capability.

[0142] In practical implementation, as a preferred implementation method, it will continue to be combined with Figure 22 and Figure 23 As shown in the figure, taking the front seat mounting beam 501 as an example, each front seat mounting beam 5 in this embodiment includes a beam body 5a and a connecting beam 5b connected to the left and right ends of the beam body 5a, and the connecting beams 5b at both ends are specifically connected to the door sill beams 2 on both sides.

[0143] In addition, as a preferred implementation form, the crossbeam body 5a of this embodiment can also be formed by a roll-forming process. Structurally, the crossbeam body5a can be arranged to have a plurality of crossbeam main bodies 5c connected in sequence in the front-rear direction of the whole vehicle, and the cross-section of each crossbeam main body 5c is also in a "C" shape. At this time, making the crossbeam body 5a of the front-row seat mounting crossbeam 5 be formed by a roll-forming process and making the crossbeam body 5a consist of a plurality of crossbeam main bodies 5c with a "C" -shaped cross-section can increase the structural strength of the front-row seat mounting crossbeam 5 itself, contribute to improving the stability of the front-row seat setting, and at the same time is beneficial to improving the torsional stiffness of the middle part of the vehicle body and the collision force transmission effect of the front-row seat mounting crossbeam 5.

[0144] In this embodiment, as a preferred implementation form, the above middle channel 18 also has a plurality of middle-channel main bodies 18a connected in sequence in the left-right direction of the whole vehicle structurally, and referring to Figure 23 the cross-sectional structure of the crossbeam body 5a shown, the cross-section of each middle-channel main body 18a is also in a "C" shape. In this way, making the middle channel 18 consist of middle-channel main bodies 18a connected in sequence and with a "C" -shaped cross-section can make the cross-section of the middle channel 18 in a wavy structure in the left-right direction of the whole vehicle, which can increase the cross-sectional area of the middle channel 18, improve the structural strength of the middle channel 18 itself, and contribute to improving the collision force transmission performance of the middle channel 18.

[0145] Of course, during specific implementation, to facilitate the connection between the front end of the middle channel 18 and the lower front crossbeam 14, this embodiment can make the front end of the middle channel 18 have an end structure with a cross-section also in a "C" shape, and the front ends of each middle-channel main body 18a are as Figure 21 shown connected to this end structure, and this end structure is also connected to the lower front crossbeam 14.

[0146] It should be noted that during specific implementation, the battery pack mounting points on the lower rear floor crossbeam 6, the torque box 7, and the rear engine compartment crossbeam 8 generally can adopt conventional mounting structural forms such as threaded sleeves or projection welding nuts.

[0147] For the battery pack mounting points on the sill beam 2, of course, they can also adopt structures such as conventional threaded sleeves or projection welding nuts. However, as a preferred implementation form, referring to <id = Figures 24 to 26 shown, and taking the battery pack mounting point at the rear sill beam 2a as an example, the battery pack mounting points at the sill beam 2 specifically include mounting through holes 201 provided on the rear sill beam 2a and nut plates 9 provided inside the rear sill beam 2a.

[0148] The aforementioned mounting hole 201 is an elongated hole extending along the left-right direction of the entire vehicle, and the nut plate 9 has a base plate 901 and a welded nut 902 disposed on the base plate 901. At the same time, a collapsible plate 901a is also connected to the base plate 901 via a deformable connecting part 901b, and the welded nut 902 is welded to the collapsible plate 901a. When the connecting part 901b deforms, the welded nut 902 can move relative to the base plate 901 along the length direction of the mounting hole 201.

[0149] Thus, by making the battery pack mounting point at the sill beam 2 consist of a long strip mounting hole 201 and a nut plate 9 having a base plate 901 and a welding nut 902, and the welding nut 902 can move relative to the base plate 901 along the length direction of the mounting hole 201, this embodiment can achieve the collapse displacement of the battery pack side mounting point when the vehicle is involved in a side collision, which helps to reduce the impact on the battery pack and improve the safety of the battery pack.

[0150] In this embodiment, for the aforementioned nut plate 9, more specifically, please refer to... Figure 25 and Figure 26 As shown, as an exemplary structural form, a through hole 901c is provided on the base plate 901, and one side of the through hole 901c also penetrates the base plate 901. At the same time, the crumple plate 901a is located in the through hole 901c. The crumple plate 901a is located at both ends in the length direction (left-right direction of the vehicle) of the mounting hole 201. One end is connected to the base plate 901 through the connecting part 901b, and the other end forms a crushing deformation zone k between itself and the inner wall of the through hole 901c.

[0151] At this time, the collapse plate 901a is placed in the through hole 901c on the base plate 901, and one end of the collapse plate 901a is connected to the base plate 901 through the connecting part 901b, and the other end forms a crushing deformation zone k. This helps to simplify the structure of the nut plate 9 and can limit the movement distance of the collapse plate 901a with the welded nut 902, thus ensuring the performance of the nut plate 9 when it collapses.

[0152] In this embodiment, the connecting portion 901b can be, for example, a curved connecting plate. In its natural state, the connecting plate is curved, and the crumple plate 901a is positioned within the base plate 901. During a side collision, the side of the battery pack is subjected to force, which is transmitted to the crumple plate 901a via bolts connected to the weld nut 902. Then, the crumple plate 901a pulls on the connecting portion 901b, deforming the curved connecting portion 901b and compressing the crumple deformation zone k, thereby achieving the crumple function of the battery pack mounting point a.

[0153] It is understandable that in this embodiment, the connecting portion 901b is made of a curved connecting plate, which not only has the advantages of simple structure and easy manufacturing, but also has a good collapse deformation effect. Moreover, in specific implementation, in addition to using a curved connecting plate located at one end of the collapse plate 901a, the connecting portion 901b can also be set in other positions. For example, it is also possible to set the connecting portion 901b composed of curved connecting plates on the front and rear sides of the collapse plate 901a.

[0154] In this embodiment, the vehicle body reinforcement structure connects the reinforcing plate 15 within the rear floor frame 100 to the rear end of the longitudinal beam 10 on the front floor. The front end of the longitudinal beam 10 on the front floor is connected to the lower crossbeam 14 of the front bulkhead via the longitudinal beam 11. Simultaneously, the rear floor frame 100, the lower crossbeam 14, and the longitudinal beams 10 and 11 on both sides of the front floor form a first annular reinforcement structure. Furthermore, by providing a C-shaped lower rear floor crossbeam 6, the torsion boxes 7 on both sides are connected via the rear section crossbeam 8 of the engine compartment. The lower rear floor crossbeam 6, the rear section crossbeam 8 of the engine compartment, and the sill beams 2 and torsion boxes 7 on both sides are connected to form a second annular reinforcement structure.

[0155] Therefore, this embodiment can not only utilize the high strength of each annular structure to increase the structural strength and torsional stiffness of the vehicle body, but also utilize the annular force transmission channel formed by the annular structure to facilitate the transmission and dispersion of collision forces in the vehicle body, thereby improving the safety of the entire vehicle.

[0156] In the event of a car collision, on the one hand, such as Figure 16 As shown, taking a frontal collision as an example, the frontal collision force is transmitted rearward through the front bumper beam and the front cabin longitudinal beam 4, and can also be transmitted rearward through the front bulkhead longitudinal beam 11 and the front floor longitudinal beam 10. Furthermore, the collision force transmitted to the rear floor longitudinal beam 101 can also achieve dual-channel force transmission at the rear floor longitudinal beam 101 based on the upper and lower dual-cavity structure in the rear floor longitudinal beam 101, thereby improving the transmission effect of the collision force.

[0157] On the other hand, such as Figure 27 As shown, taking a frontal collision as an example, the collision force is transmitted rearward from the front engine compartment longitudinal beam 4. At the rear of the front engine compartment, the collision force can be transmitted laterally (in the left-right direction of the vehicle) via the rear section crossbeam 8. In the middle of the vehicle, the collision force can be transmitted rearward along the side sill beams 2, and can also be transmitted laterally using the front seat mounting crossbeam 5. At the rear of the vehicle, the collision force from the sill beam 2 can be transmitted longitudinally (in the front-rear direction of the vehicle) and laterally at the rear floor frame 100, and can also be transmitted using the lower rear floor crossbeam 6, thus achieving a good transmission and dispersion effect to improve collision safety.

[0158] Example 2

[0159] This embodiment relates to a vehicle equipped with the body reinforcement structure described in Embodiment 1. By incorporating the body reinforcement structure of Embodiment 1, the vehicle of this embodiment can increase the structural strength and torsional stiffness of the body, and also facilitate the transmission and dispersion of collision forces within the body, thereby improving the overall safety of the vehicle and demonstrating excellent practicality.

[0160] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle body reinforcement structure, characterized in that: The rear floor assembly (1) includes an integrally thermoformed rear floor frame (100), front floor longitudinal beams (10) on the left and right sides, and front lower crossbeam (14), as well as a rear floor lower crossbeam (6) connected to the bottom of the rear floor frame (100), sill beams (2) on the left and right sides, and torsion boxes (7) connected to the rear ends of the front cabin longitudinal beams (4) on the left and right sides respectively. The rear ends of the longitudinal beams (10) on both sides of the front floor are connected to the rear floor frame (100), and the front ends of the longitudinal beams (10) on both sides of the front floor are connected to the lower crossbeam (14) of the front enclosure through the front longitudinal beam (11). The rear floor frame (100), the lower crossbeam (14), and the longitudinal beams (10) and the front longitudinal beams (11) on both sides of the front floor are connected to form a first ring-shaped reinforcing structure. The rear floor frame (100) has rear floor longitudinal beams (101) on the left and right sides, and a rear floor middle crossbeam (102) connecting the rear floor longitudinal beams (101) on both sides. The rear floor lower crossbeam (6) is in the shape of a "C" with its opening facing forward. The rear floor lower crossbeam (6) is connected between the front section (101a) of the rear floor longitudinal beams (101) on both sides and the rear floor middle crossbeam (102). The left and right sides of the rear floor lower crossbeam (6) are respectively connected to the rear end of the corresponding side sill beam (2). The torsion box (7) on each side is connected to the front end of the sill beam (2) on the same side. The rear section crossbeam (8) of the cabin is connected between the torsion boxes (7) on both sides. The rear floor lower crossbeam (6), the rear section crossbeam (8) of the cabin, the sill beam (2) on both sides and the torsion box (7) are connected to form a second ring reinforcement structure.

2. The vehicle body reinforcement structure according to claim 1, characterized in that: Each of the rear floor longitudinal beams (101) on each side is provided with a reinforcing sealing plate (15). The reinforcing sealing plates (15) on both sides extend along the front-rear direction of the vehicle, and the front end of each reinforcing sealing plate (15) extends from the front end of the rear floor longitudinal beam (101) on the same side. The rear ends of the longitudinal beams (10) on the front floor on each side are connected to the rear floor frame (100) via the reinforcing sealing plate (15) on the same side.

3. The vehicle body reinforcement structure according to claim 2, characterized in that: Each of the reinforcing sealing plates (15) is separated into an upper cavity (M) and a lower cavity (N) located above and below the reinforcing sealing plate (15) respectively within the rear floor longitudinal beam (101) on the same side. The rear end of each of the reinforcing sealing plates (15) is correspondingly provided with the front mounting part of the rear subframe in the rear floor longitudinal beam (101) on the same side.

4. The vehicle body reinforcement structure according to claim 3, characterized in that: The top of the rear floor longitudinal beam (101) is covered with a longitudinal beam cover plate (200a). The lower cavity (N) is formed between the rear floor longitudinal beam (101) and the reinforcing sealing plate (15), and the upper cavity (M) is formed between the rear floor longitudinal beam (101), the reinforcing sealing plate (15) and the longitudinal beam cover plate.

5. The vehicle body reinforcement structure according to claim 4, characterized in that: The front mounting part of the rear subframe includes a screw connector (16) located in the lower cavity (N). The screw connector (16) is integrally formed, and the screw connector (16) has a support plate (1601) connected to the rear floor longitudinal beam (101), and a screw sleeve (1602) with one end connected to the support plate (1601). The threaded sleeve (1602) is provided with a threaded connection hole (1603), which is provided through the support plate (1601), and the bottom of the rear floor longitudinal beam (101) is provided with a connection through hole corresponding to the threaded connection hole (1603).

6. The vehicle body reinforcement structure according to claim 5, characterized in that: One end of the threaded sleeve (1602) passes through the reinforcing sealing plate (15) and extends into the upper cavity (M); The distance between the end of the threaded sleeve (1602) that extends into the upper cavity (M) and the reinforcing sealing plate (15) is within 10 mm, and the threaded sleeve (1602) is connected to the reinforcing sealing plate (15).

7. The vehicle body reinforcement structure according to claim 5, characterized in that: The reinforcing sealing plate (15) is provided with reinforcing ribs at the part where the threaded sleeve (1602) extends into the upper cavity (M); The reinforcing rib includes an annular reinforcing rib body (1501) and a plurality of linear reinforcing rib bodies (1502) connected to the annular reinforcing rib body (1501). The annular reinforcing rib (1501) is arranged around the threaded sleeve (1602), and a plurality of linear reinforcing ribs (1502) are arranged radially with the annular reinforcing rib (1501) as the center.

8. The vehicle body reinforcement structure according to claim 5, characterized in that: The rear subframe front mounting portion also includes a side reinforcing plate (17) located within the lower cavity (N), the side reinforcing plate (17) being connected to the rear floor longitudinal beam (101), and the side reinforcing plate (17) being arranged side-by-side on one side of the threaded sleeve (1602), the threaded sleeve (1602) being connected to the side reinforcing plate (17); and / or, The support plate (1601) is spot welded to the rear floor longitudinal beam (101), and the bolted part (16) is integrally stamped.

9. The vehicle body reinforcement structure according to any one of claims 1 to 8, characterized in that: The rear floor longitudinal beams (101) on each side are connected to the rear end of the threshold beams (2) on the same side.

10. The vehicle body reinforcement structure according to claim 9, characterized in that: The rear floor frame (100) also has a rear floor front crossbeam (103) and a rear floor rear crossbeam (104) connected between the rear floor longitudinal beams (101) on both sides. The front cross member (103) of the rear floor is connected between the front sections (101a) of the rear floor longitudinal beams (101) on both sides, the rear cross member (104) of the rear floor is connected between the rear sections (101b) of the rear floor longitudinal beams (101) on both sides, and the middle cross member (102) of the rear floor is connected to the transition area between the front section (101a) and the rear section (101b) of the rear floor longitudinal beam (101) on each side; A ring structure is formed by connecting the front cross member (103) of the rear floor, the middle cross member (102) of the rear floor and the rear floor longitudinal beams (101) on both sides, and a ring structure is formed by connecting the rear cross member (104) of the rear floor, the middle cross member (102) of the rear floor and the rear floor longitudinal beams (101) on both sides.

11. The body strengthening structure according to claim 9, wherein: Rear sill beams (2a) are provided at the rear ends of the sill beams (2) on both sides, and each rear sill beam (2a) is connected to the rear floor longitudinal beam (101) on the same side; A longitudinal beam front cavity (G) is formed by enclosing between the front section (101a) on each side, the rear sill beam (2a) and the rear floor panel (200), and a lower cross beam side cavity (H) is formed by enclosing between the front section (101a) on each side, the rear sill beam (2a) and the lower cross beam (6) of the rear floor; A middle cross beam cavity (E) is formed by enclosing between the middle cross member (102) of the rear floor and the rear floor panel (200), and a lower cross beam middle cavity (F) is formed by enclosing between the lower cross beam (6) of the rear floor and the middle cross member (102) of the rear floor; The longitudinal beam front cavity (G) and the lower cross beam side cavity (H) are stacked in the up-and-down direction of the whole vehicle, and the middle cross beam cavity (E) and the lower cross beam middle cavity (F) are stacked in the up-and-down direction of the whole vehicle.

12. The body strengthening structure according to claim 1, wherein: It further includes a front row seat mounting cross beam (5) connected between the sill beams (2) on both sides, and a middle channel (18) extending in the front-rear direction of the whole vehicle; The front row seat mounting cross beam (5) penetrates from one side sill beam (2) to the other side sill beam (2), the front end of the middle channel (18) is connected to the front lower cross beam (14), and the rear end of the middle channel (18) is connected to the front row seat mounting cross beam (5).

13. The body strengthening structure according to claim 12, wherein: The front row seat mounting cross beam (5) includes a cross beam body (5a), and connecting beams (5b) connected to the left and right ends of the cross beam body (5a), the cross beam body (5a) is formed by roll forming, and the cross beam body (5a) has a plurality of cross beam main bodies (5c) connected in sequence in the front-rear direction of the whole vehicle, and the cross section of each cross beam main body (5c) is in a "U" shape; and / or, The middle channel (18) has a plurality of middle channel main bodies (18a) connected in sequence in the left-right direction of the whole vehicle, and the cross section of each middle channel main body (18a) is in a "U" shape.

14. The vehicle body reinforcement structure according to claim 1, characterized in that: Both sides of the threshold beam (2) are provided with mounting holes (2b) for battery pack installation, and nut plates (9) are provided corresponding to the mounting holes (2b); The mounting hole (2b) is an elongated hole extending along the left and right direction of the vehicle. The nut plate (9) has a base plate (901) and a welding nut (902) set on the base plate (901). The battery pack is connected to the welding nut (902) by a connecting bolt passing through the mounting hole (2b). A collapsible plate (901a) is connected to the base plate (901) via a deformable connecting part (901b). A welding nut (902) is connected to the collapsible plate (901a). When the connecting part (901b) deforms, the welding nut (902) can move relative to the base plate (901) along the length direction of the mounting hole (2b).

15. The vehicle body reinforcement structure according to claim 14, characterized in that: The base plate (901) has a through hole (901c), and the collapsible plate (901a) is located inside the through hole (901c). The collapsible plate (901a) is located at both ends of the mounting through hole (2b) along its length. One end of the collapsible plate is connected to the base plate (901) through the connecting part (901b), and the other end forms a deformation space (k) between itself and the inner wall of the through hole (901c); and / or, The connecting part (901b) adopts a curved connecting plate.

16. A vehicle, characterized in that: The vehicle is provided with a body reinforcement structure as described in any one of claims 1 to 15.

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