Body structure and vehicle equipped with the same

Abstract

This invention provides a vehicle body structure and a vehicle equipped with it. The vehicle body structure includes a rear floor longitudinal beam and a reinforcing plate disposed within the rear floor longitudinal beam. The reinforcing plate extends along the longitudinal direction of the vehicle and divides the rear floor longitudinal beam into an upper cavity and a lower cavity located above and below the reinforcing plate, respectively. The rear end of the reinforcing plate is correspondingly disposed with the front mounting portion of the rear subframe within the rear floor longitudinal beam, and the front end of the reinforcing plate extends from the front end of the rear floor longitudinal beam. The vehicle body structure of this invention can increase the structural strength of the rear floor longitudinal beam by utilizing the formed dual-cavity structure, improve the impact force transmission capacity of the rear floor longitudinal beam, and also improve the dynamic stiffness of the rear subframe mounting point, thereby improving the torsional performance of the rear of the vehicle body.

Description

Technical Field

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

[0002] In the event of a vehicle collision, the vehicle body needs to effectively transmit the impact force to disperse and absorb it, protecting the safety of the occupants. Therefore, as one of the main channels for transmitting impact force within the vehicle body, the structural strength of the rear floor longitudinal beam, and its connection with other surrounding components, significantly influences its impact force transmission performance. Furthermore, at the rear of the vehicle, the rear subframe, as a crucial component, also affects the vehicle's handling and comfort due to the dynamic stiffness of its mounting points. Therefore, increasing the dynamic stiffness of the rear subframe mounting points is also an important aspect of vehicle body design. Summary of the Invention

[0003] In view of this, the present invention aims to provide a vehicle body structure that can increase the structural strength of the rear floor longitudinal beam and improve the dynamic stiffness of the rear subframe mounting point.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A vehicle body structure includes a rear floor longitudinal beam and a reinforcing sealing plate disposed within the rear floor longitudinal beam;

[0006] The reinforcing sealing plate extends along the front-rear direction of the vehicle and divides the rear floor longitudinal beam into an upper cavity and a lower cavity located above and below the reinforcing sealing plate, respectively.

[0007] The rear end of the reinforcing plate is correspondingly positioned to the front mounting portion of the rear subframe within the rear floor longitudinal beam, and the front end of the reinforcing plate extends from the front end of the rear floor longitudinal beam.

[0008] Furthermore, it also includes longitudinal beams arranged side by side on the front floor inside the sill beam;

[0009] The longitudinal beam on the front floor is located above the front floor and extends along the front-rear direction of the vehicle.

[0010] The front end of the longitudinal beam on the front floor is connected to the front bulkhead longitudinal beam, and the front bulkhead longitudinal beam and the front engine compartment longitudinal beam are connected in the longitudinal direction of the whole vehicle. The rear end of the longitudinal beam on the front floor is connected to the front end of the reinforcing plate.

[0011] Furthermore, the front end of the rear floor longitudinal beam is connected to the rear floor front crossbeam, the end of the rear floor front crossbeam is connected to the sill beam, and the reinforcing sill plate extends forward from the bottom of the rear floor front crossbeam and is connected to the front floor longitudinal beam; and / or,

[0012] An upper longitudinal beam cavity is formed between the longitudinal beam on the front floor and the front floor itself. A front longitudinal beam cavity is formed between the front longitudinal beam and the lower front panel. The front end of the upper longitudinal beam cavity is connected to the front longitudinal beam cavity, and the rear end of the upper longitudinal beam cavity is connected to the lower cavity.

[0013] Furthermore, the rear floor longitudinal beam has a longitudinal beam body integrally formed in the rear floor frame, and a longitudinal beam cover plate covering the top of the longitudinal beam body.

[0014] The reinforcing sealing plate and the front mounting part of the rear subframe are located inside the longitudinal beam body, and the lower cavity is formed between the longitudinal beam body and the reinforcing sealing plate, while the upper cavity is formed between the longitudinal beam body, the reinforcing sealing plate and the longitudinal beam cover plate.

[0015] Furthermore, the rear floor frame is integrally thermoformed, and the rear floor frame also includes a rear floor middle crossbeam and a rear floor rear crossbeam connected to the main body of the longitudinal beam.

[0016] The front mounting section of the rear subframe is located in the area where the main body of the longitudinal beam intersects and connects with the crossbeam in the rear floor.

[0017] Furthermore, the front mounting portion of the rear subframe includes a nut plate disposed within the lower cavity;

[0018] The nut plate is integrally formed, and the nut plate has a base plate connected to the rear floor longitudinal beam, and a threaded sleeve connected to the base plate at one end;

[0019] The screw sleeve is provided with a threaded connection hole, which penetrates the base plate, and the bottom of the rear floor longitudinal beam is provided with a connection through hole corresponding to the threaded connection hole.

[0020] Furthermore, the end of the threaded sleeve away from the base plate passes through the reinforcing sealing plate and extends into the upper cavity, and the threaded sleeve is connected to the reinforcing sealing plate.

[0021] Furthermore, the distance between the end of the threaded sleeve that extends into the upper cavity and the reinforcing sealing plate is within 10mm;

[0022] The reinforcing sealing plate has reinforcing ribs at the portion where the threaded sleeve extends into the upper cavity.

[0023] Furthermore, the reinforcing rib includes an annular reinforcing rib body and a plurality of linear reinforcing rib bodies connected to the annular reinforcing rib body;

[0024] The annular reinforcing rib is arranged around the threaded sleeve, and the plurality of linear reinforcing ribs are arranged radially around the annular reinforcing rib.

[0025] Furthermore, the front mounting portion of the rear subframe also includes a reinforcing plate located within the lower cavity;

[0026] At least one side of the reinforcing plate is connected to the rear floor longitudinal beam, and the reinforcing plates are arranged side by side on one side of the threaded sleeve, the threaded sleeve being connected to the reinforcing plate.

[0027] Furthermore, the reinforcing plate is provided with a connecting flange, and the reinforcing plate is connected to the rear floor longitudinal beam through the connecting flange; and / or,

[0028] A groove is formed on the reinforcing plate, and the threaded sleeve is connected in the groove, with the groove conforming to the shape of the threaded sleeve.

[0029] Furthermore, the base plate is spot-welded to the rear floor longitudinal beam; and / or, the nut plate is integrally stamped.

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

[0031] The vehicle body structure described in this invention, by providing a reinforcing plate extending along the longitudinal direction of the vehicle within the rear floor longitudinal beam, and by dividing the reinforcing plate into an upper cavity and a lower cavity within the rear floor longitudinal beam, and by aligning the rear end of the reinforcing plate with the front mounting part of the rear subframe, not only increases the structural strength of the rear floor longitudinal beam and enhances its collision force transmission capability through the formed dual-cavity structure, but also improves the dynamic stiffness of the rear subframe mounting point, thereby improving the torsional performance of the rear of the vehicle body and ultimately enhancing the overall collision safety of the vehicle.

[0032] Furthermore, connecting the front end of the reinforcing panel to the longitudinal beam on the front floor creates a continuous force transmission channel between the reinforcing panel and the longitudinal beam in the longitudinal direction of the vehicle. This, combined with the force transmission channel formed by the sill beam, creates a dual-channel force transmission structure within the vehicle body, which is beneficial for the transmission and dispersion of collision forces. The front end of the rear floor longitudinal beam connects to the front crossbeam of the rear floor, and the end of the front crossbeam connects to the sill beam. The front end of the reinforcing panel extends from the bottom of the front crossbeam of the rear floor. This not only facilitates the connection between the reinforcing panel and the longitudinal beam on the front floor, but also allows the front crossbeam of the rear floor to form a lateral force transmission channel that intersects with the longitudinal beam on the front floor, the reinforcing panel, and the rear floor longitudinal beam, further enhancing the dispersion of collision forces.

[0033] The inclusion of the upper longitudinal beam cavity and the front longitudinal beam cavity enhances the structural strength of the longitudinal beams on the front floor and in the front bulkhead. The upper longitudinal beam cavity connects with the front bulkhead longitudinal beam cavity and the lower cavity, improving the continuity of the longitudinal force transmission channels formed by the front bulkhead longitudinal beam, the front floor longitudinal beam, and the rear floor longitudinal beam, thus improving the impact force transmission effect. The rear floor longitudinal beam consists of a main body and a cover plate. The integrated molding of the rear floor frame facilitates the fabrication and molding of the rear floor longitudinal beam and also improves its structural performance.

[0034] Secondly, the integrated thermoforming of the rear floor frame facilitates its formation and ensures its structural strength. This allows the front mounting section of the rear subframe to be located at the intersection of the longitudinal beams and the central crossbeam of the rear floor. The central crossbeam enhances the rigidity of the front mounting section, improving the reliability of the subframe installation. Furthermore, the integrated molding of the nut plate eliminates the need for welded connections between the base plate and the bolt sleeve, preventing rust at the connection point and improving the overall rust resistance of the nut plate. The integrated molding also ensures the structural strength of the nut plate itself, further enhancing the reliability of the subframe installation.

[0035] One end of the threaded sleeve passes through and connects to the reinforcing plate. The reinforcing plate increases the stability of the nut plate installation and improves the rigidity of the front mounting part of the rear subframe. The distance between the reinforcing plate and the end of the threaded sleeve is within 10mm, which increases the height of the cavity along the threaded sleeve's axial direction, helping to increase the cavity's cross-sectional dimensions and improve the overall structural strength of the vehicle's longitudinal beams after the reinforcing plate is installed. Adding reinforcing ribs further enhances the rigidity of the threaded sleeve and improves the stability of the subframe installation by utilizing the increased structure of the reinforcing plate.

[0036] In addition, the reinforcing ribs consist of annular reinforcing ribs and radially arranged linear reinforcing ribs, which enhance the deformation resistance of the central threaded sleeve and further increase the overall rigidity of the nut plate. The addition of reinforcing plates increases the strength of the cavity structure, improves the overall strength of the nut plate location, and enhances the reliability of the rear subframe installation. The reinforcing plate is connected to the vehicle body longitudinal beams via connecting flanges, which not only increases the structural strength of the reinforcing plate itself but also improves the reliability of the connection between the reinforcing plate and the vehicle body longitudinal beams. The threaded sleeve is connected within a groove on the reinforcing plate, facilitating the connection between the two and ensuring the stability of the connection between the threaded sleeve and the reinforcing plate.

[0037] The base plate is spot-welded to the body longitudinal beams, which reduces damage to the base plate and body longitudinal beams, avoids the ablation failure caused by MIG welding, improves the torsional resistance of the nut plate after connection, and ensures the reliability of the nut plate within the body longitudinal beams. The nut plate is formed by one-piece stamping, ensuring its structural strength and toughness, and increasing the reliability of the nut plate structure.

[0038] Another object of the present invention is to provide a vehicle having the body structure described above.

[0039] The vehicle described in this invention has the same beneficial effects as the aforementioned vehicle body structure compared to the prior art, and will not be repeated here. Attached Figure Description

[0040] 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:

[0041] Figure 1 This is a schematic diagram of the vehicle body structure described in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram showing the connection between the rear floor longitudinal beam, the front floor longitudinal beam, and the front engine compartment longitudinal beam as described in an embodiment of the present invention.

[0043] Figure 3 This is a schematic diagram illustrating the cooperation between the reinforcing sealing plate and the front crossbeam of the rear floor as described in an embodiment of the present invention;

[0044] Figure 4 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;

[0045] Figure 5 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.

[0046] Figure 6 for Figure 5 A magnified view of part A in the middle;

[0047] Figure 7 This is a schematic diagram of the threaded sleeve through-reinforced sealing plate configuration according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram showing the relative arrangement of the reinforcing sealing plate, nut plate, and reinforcing plate according to an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the nut plate according to an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the reinforcing plate according to an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram showing the connection between the nut plate and the reinforcing plate according to an embodiment of the present invention;

[0052] Figure 12 for Figure 11 A schematic diagram of the structure shown from another perspective;

[0053] Figure 13 This is a schematic diagram of the structure of the reinforcing sealing plate according to an embodiment of the present invention;

[0054] Figure 14 This is a schematic diagram illustrating the force transmission during a head-on collision of the vehicle body structure described in an embodiment of the present invention.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Rear floor longitudinal beam; 2. Rear floor panel; 3. Front floor longitudinal beam; 4. Sill beam; 5. Front bulkhead longitudinal beam; 6. Front engine compartment longitudinal beam; 7. Rear floor front crossbeam; 8. Front floor; 9. Front bulkhead panel; 10. Front bulkhead lower panel; 11. Reinforcing sealing plate; 12. Nut plate; 13. Reinforcing plate;

[0057] 1a. Main body of longitudinal beam; 1b. Cover plate of longitudinal beam; 100. Rear floor frame; 101. Middle crossbeam of rear floor; 102. Rear crossbeam of rear floor;

[0058] 4a. Rear door sill beam;

[0059] 1201, base plate; 1202, threaded sleeve; 1203, threaded connection hole; 1204, notch;

[0060] 1101. Annular reinforcing rib; 1102. Linear reinforcing rib; 1103. Through hole; 1104. Strip reinforcing rib;

[0061] 1301. Connecting flange; 1302. Groove;

[0062] M, upper cavity; N, lower cavity; S, upper longitudinal beam cavity; Q, front longitudinal beam cavity. Detailed Implementation

[0063] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0064] 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.

[0065] 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.

[0066] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0067] Example 1

[0068] This embodiment relates to a vehicle body structure, which, in terms of overall structure, combines... Figures 1 to 4 ,as well as Figure 14 As shown, it includes a rear floor longitudinal beam 1 and a reinforcing sealing plate 11 disposed within the rear floor longitudinal beam 1.

[0069] The reinforcing plate 11 extends along the front-rear direction of the vehicle and divides the rear floor longitudinal beam 1 into an upper cavity M and a lower cavity N located above and below the reinforcing plate 11, respectively. At the same time, the rear end of the reinforcing plate 11 is correspondingly set with the front mounting part of the rear subframe in the rear floor longitudinal beam 1, and the front end of the reinforcing plate 11 extends out from the front end of the rear floor longitudinal beam 1.

[0070] At this point, by providing a reinforcing sealing plate 11 extending along the longitudinal direction of the vehicle within the rear floor longitudinal beam 1, and by dividing the reinforcing sealing plate 11 into an upper longitudinal beam cavity M and a lower longitudinal beam cavity N within the rear floor longitudinal beam 1, and by aligning the rear end of the reinforcing sealing plate 11 with the front mounting portion of the rear subframe, this embodiment can increase the structural strength of the rear floor longitudinal beam 1 and improve its collision force transmission capability using the formed dual-cavity structure. Furthermore, it can also improve the dynamic stiffness of the rear subframe mounting point, thereby enhancing the overall handling and comfort of the vehicle.

[0071] Based on the above overall structure, specifically, as a preferred embodiment, the vehicle body structure of this embodiment also includes a front floor longitudinal beam 3 arranged side by side on the inner side of the sill beam 4. The front floor longitudinal beam 3 is located above the front floor 8 and extends along the longitudinal direction of the entire vehicle. The front end of the front floor longitudinal beam 3 is connected to the front bulkhead longitudinal beam 5. The front bulkhead longitudinal beam 5 and the front engine compartment longitudinal beam 6 are connected in the longitudinal direction of the entire vehicle, and the rear end of the front floor longitudinal beam 3 is connected to the front end of the reinforcing liner 11.

[0072] It is understandable that connecting the front end of the reinforcing plate 11 to the longitudinal beam 3 on the front floor allows the reinforcing plate 11 and the longitudinal beam 11 on the front floor to form a continuous force transmission channel in the front-rear direction of the vehicle. In this way, it can work with the force transmission channel formed by the sill beam 4 to form a dual-channel force transmission structure in the vehicle body, which is beneficial to the transmission and dispersion of collision force in the vehicle body.

[0073] Furthermore, it should be noted that the rear floor longitudinal beam 1, the front floor longitudinal beam 3, the front bulkhead longitudinal beam 5, and the front engine compartment longitudinal beam 6 are all arranged symmetrically in the vehicle body. Therefore, this embodiment will take the rear floor longitudinal beam 1, the reinforcing panel 11, the front floor longitudinal beam 3, and the front bulkhead longitudinal beam 5 on one side as examples for description.

[0074] In the vehicle body structure of this embodiment, the front bulkhead longitudinal beam 5 is connected above the front bulkhead lower plate 10, and the front bulkhead lower plate 10 is connected between the front bulkhead plate 9 and the front floor 8. Meanwhile, the rear end of the front engine compartment longitudinal beam 6 and the front end of the front bulkhead longitudinal beam 5 are respectively located on the front and rear sides of the front bulkhead plate 9. Furthermore, the connection arrangement between the aforementioned front bulkhead longitudinal beam 5 and the front engine compartment longitudinal beam 6, that is, their projections in the longitudinal direction of the vehicle at least partially overlap, thus forming a reliable force transmission channel between the front engine compartment longitudinal beam 6 and the front bulkhead longitudinal beam 5, allowing the collision force to be transmitted along the longitudinal direction of the vehicle using this new force transmission channel.

[0075] In this embodiment, as a preferred implementation, the following continues... Figure 1 and Figure 2 As shown, the front end of the rear floor longitudinal beam 1 is connected to the rear floor front crossbeam 7, the end of the rear floor front crossbeam 7 is connected to the sill beam 4, and the reinforcing sill plate 11 also extends forward from the bottom of the rear floor front crossbeam 7 to connect with the front floor longitudinal beam 3.

[0076] At this point, it should be noted that the rear end of the sill beam 4 generally has a rear sill beam 4a, which is connected to the front section of the rear floor longitudinal beam 1. Thus, the end of the aforementioned rear floor front crossbeam 7 is connected to the rear sill beam 4a to achieve the connection with the sill beam 4.

[0077] In addition, it is understandable that by connecting the front end of the rear floor longitudinal beam 1 to the rear floor front crossbeam 7, and connecting the end of the rear floor front crossbeam 7 to the sill beam 4, and by extending the front end of the reinforcing plate 11 from the bottom of the rear floor front crossbeam 7, it is not only convenient to connect the reinforcing plate 11 to the front floor longitudinal beam 3, but also to use the rear floor front crossbeam 7 to form a transverse (left-right direction of the whole vehicle) force transmission channel that intersects with the front floor longitudinal beam 3, the reinforcing plate 11, and the rear floor longitudinal beam 1, thereby helping to improve the collision force dispersion effect.

[0078] In this embodiment, based on the provision of the front floor longitudinal beam 3 and the front bulkhead longitudinal beam 5, the following is still referred to Figure 14 As shown, in a preferred embodiment, an upper longitudinal beam cavity S is formed between the longitudinal beam 3 on the front floor and the front floor itself, while a front longitudinal beam cavity Q is formed between the front longitudinal beam 5 and the lower front panel 10. Furthermore, the front end of the upper longitudinal beam cavity S communicates with the front longitudinal beam cavity Q, and the rear end of the upper longitudinal beam cavity S communicates with the lower cavity N.

[0079] In this way, by setting up the upper longitudinal beam cavity S and the front longitudinal beam cavity Q, the structural strength of the cavity structure can be improved by taking advantage of its high structural strength. 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 5, the front longitudinal beam 3 and the rear longitudinal beam 1, which is also conducive to improving the collision force transmission effect.

[0080] In this embodiment, as a preferred implementation, the rear floor longitudinal beam 1 has a longitudinal beam body 1a integrally formed in the rear floor frame 100, and a longitudinal beam cover plate 1b covering the top of the longitudinal beam body 1a.

[0081] The reinforcing plate 11 and the front mounting part of the rear subframe are located within the longitudinal beam body 1a. The longitudinal beam body 1a and the reinforcing plate 11 form a lower cavity N, while the longitudinal beam body 1a, the reinforcing plate 11, and the longitudinal beam cover plate 1b form an upper cavity M. In this configuration, the rear floor longitudinal beam 1 is composed of the longitudinal beam body 1a and the longitudinal beam cover plate 1b. The integrated molding of the rear floor frame 100 facilitates the fabrication and molding of the rear floor longitudinal beam 1 and also improves its structural performance.

[0082] Furthermore, regarding the rear floor frame 100 of this embodiment, as a preferred implementation, it is combined with... Figure 4 and Figure 5 As shown, it can be integrally thermoformed, and the rear floor frame 100 further includes a rear floor crossbeam 101 and a rear floor crossbeam 102 connected to the longitudinal beam body 1a. This allows the rear floor frame 100 to be integrally thermoformed, which facilitates the forming of the rear floor frame 100 and also ensures the structural strength of the rear floor frame 100.

[0083] 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.

[0084] 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.

[0085] In this embodiment, the longitudinal beam cover plate 1b covering the top of the longitudinal beam body 1a is specifically a part of the rear floor panel assembly. Typically, the longitudinal beam cover plates 1b at both rear floor longitudinal beams 1 and the middle rear floor panel 2 together form the rear floor panel assembly. The rear floor panel assembly, together with the aforementioned rear floor frame 100 and the rear sill beams 4a connected to the outer sides of the front section of the two rear floor longitudinal beams 1, can be combined to form the rear floor assembly in the vehicle body.

[0086] Still Figure 5 As shown, in a preferred embodiment, the front mounting portion of the rear subframe is located in the area where the longitudinal beam body 1a intersects with the rear floor crossbeam 101. This location, with the front mounting portion of the rear subframe in the area where the longitudinal beam body 1a intersects with the rear floor crossbeam 101, enhances the rigidity of the front mounting point of the rear subframe, thereby improving the reliability of the rear subframe mounting.

[0087] In addition, as a preferred structural form, continuing as... Figures 6 to 12 As shown, the front mounting part of the rear subframe in this embodiment includes a nut plate 12 disposed in the longitudinal beam body 1a, and the nut plate 12 is specifically located in the lower cavity N.

[0088] The nut plate 12 is integrally formed and structurally includes a base plate 1201 and a threaded sleeve 1202 connected to the base plate 1201 at one end. The base plate 1201 is connected to the longitudinal beam body 1a. The threaded sleeve 1202 has a threaded connection hole 1203 that penetrates through the base plate 1201. At the same time, a connection through hole corresponding to the threaded connection hole 1203 is provided at the bottom of the longitudinal beam body 1a.

[0089] Understandably, by integrally molding the nut plate 12, there is no welded connection between the base plate 1201 and the threaded sleeve 1202 in the nut plate 12. This prevents rust from occurring at the connection point and improves the overall rust resistance of the nut plate 12. Furthermore, the integral molding of the nut plate 12 also ensures its structural strength, which helps to improve its reliability in use.

[0090] In this embodiment, as a preferred implementation, the nut plate 12 can be integrally stamped during manufacturing. Furthermore, in terms of specific configuration, the base plate 1201 can, for example, extend along the length of the longitudinal beam body 1a, with the bottom end of the threaded sleeve 1202 connected to the middle of the base plate 1201.

[0091] Here, the nut plate 12 is formed by one-piece stamping, which can ensure the structural strength and toughness of the nut plate 12 and increase the reliability of the nut plate 12 structure. In terms of specific forming process, after the nut plate 12 is formed by stamping through multiple processes, the threaded connection hole 1203 can be processed by tapping machine.

[0092] Furthermore, the thickness of the nut plate 12 can range from 2.5 to 3 mm. For example, the thickness of the nut plate 12 can be 2.5 mm, 2.8 mm, or 3 mm. Meanwhile, the nut plate 12 is preferably made of DC series steel or high-strength steel. When the nut plate 12 is made of high-strength steel, the strength of the material is generally below 1000 MPa to avoid difficulties in forming the nut plate 12 due to excessive strength, and to prevent the threaded sleeve 1202 from becoming too brittle and prone to breakage.

[0093] As a preferred connection method, the base plate 1201 in this embodiment can be spot welded to the longitudinal beam body 1a. Spot welding the base plate 1201 to the longitudinal beam body 1a can reduce damage to the base plate 1201 and the longitudinal beam body 1a, avoid the ablation failure caused by the use of MIG welding in the prior art, improve the torsional resistance of the nut plate 12 after connection, and ensure the reliability of the nut plate 12 in the longitudinal beam body 1a.

[0094] To further improve the spot welding effect between the base plate 1201 and the longitudinal beam body 1a, this embodiment can also provide a U-shaped notch 204 at one edge of the base plate 1201 to increase the number of weld points, thereby improving the welding strength between the base plate 1201 and the longitudinal beam body 1a. Of course, depending on specific usage requirements, the notch 204 can also be set in other positions and in other shapes.

[0095] In this embodiment, as a preferred implementation, the end of the threaded sleeve 1202 away from the base plate 1201 also penetrates the reinforcing sealing plate 11 and extends into the upper cavity M of the longitudinal beam, and the threaded sleeve 1202 is also connected to the reinforcing sealing plate 11. At this time, by setting one end of the threaded sleeve 1202 through the reinforcing sealing plate 11 and connecting it to the reinforcing sealing plate 11, the stability of the nut plate 12 can be increased by utilizing the reinforcing sealing plate 11, which helps to improve the rigidity of the front mounting part of the rear subframe.

[0096] In a practical implementation, as an example arrangement, the distance between the end of the threaded sleeve 1202 that extends into the upper cavity M and the reinforcing sealing plate 11 can be set within 10mm. This arrangement increases the height of the cavity along the axial direction of the threaded sleeve 1202, which helps to increase the cross-sectional dimensions of the lower cavity N and improves the overall structural strength of the longitudinal beam body 1a after the reinforcing sealing plate 11 is installed.

[0097] In this embodiment, we continue to combine Figure 13 As shown, in a preferred structural form, the portion of the threaded sleeve 1202 of the reinforcing sealing plate 11 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 1101 and multiple linear reinforcing ribs 1102 connected to the annular reinforcing ribs 1101.

[0098] The reinforcing sealing plate 11 has a through hole 1103 for the end of the threaded sleeve 1202 to pass through. An annular reinforcing rib 1101 is formed on the edge of the through hole 1103 and surrounds the threaded sleeve 1202. Multiple linear reinforcing ribs 1102 are arranged radially around the annular reinforcing rib 1101. Furthermore, the number of linear reinforcing ribs 1102 can be set to... Figure 13 The quantities shown, and except for Figure 13 In addition to the quantities shown, the quantities can be determined based on usage requirements.

[0099] In this embodiment, it is understood that the reinforcing ribs are composed of annular reinforcing ribs 1101 and radially arranged linear reinforcing ribs 1102, which can improve the deformation resistance of the threaded sleeve 1202 located in the middle position, further increase the overall rigidity of the nut plate 12, reduce the deformation of the threaded sleeve 1202 during the movement, and thus improve the reliability of the nut plate 12.

[0100] In addition to the aforementioned reinforcing ribs, as a preferred embodiment, this embodiment also provides a plurality of strip-shaped reinforcing ribs 304 extending along the length of the reinforcing sealing plate 11, one of which extends to connect with a corresponding linear reinforcing rib 1102. These strip-shaped reinforcing ribs 304 strengthen the structure of the reinforcing sealing plate 11 and are simple in structure and easy to process and form.

[0101] 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 reinforcing plate 13 located within the lower cavity N. At least one side of the reinforcing plate 13 is connected to the main body 1a of the longitudinal beam in the rear floor longitudinal beam 1, and the reinforcing plate 13 is arranged side-by-side on one side of the threaded sleeve 1202, which is also connected to the reinforcing plate 13. Here, by providing the reinforcing plate 13, the strength of the lower cavity N can be increased, improving the overall strength at the location of the nut plate 12, thus contributing to improved reliability of the rear subframe mounting.

[0102] In terms of specific structure, the aforementioned reinforcing plate 13 extends along the width direction of the longitudinal beam body 1a and can be located on the front or rear side of the threaded sleeve 1202. Furthermore, this embodiment also provides a connecting flange 1301 on the reinforcing plate 13, allowing the reinforcing plate 13 to be connected to the longitudinal beam body 1a via the connecting flange 1301. This connection between the reinforcing plate 13 and the longitudinal beam body 1a via the connecting flange 1301 not only increases the structural strength of the reinforcing plate 13 itself but also improves the reliability of the connection between the reinforcing plate 13 and the longitudinal beam body 1a.

[0103] As one example of the arrangement of the connecting flange 1301, in this embodiment, the connecting flange 1301 can be arranged, for example, at the bottom and both sides of the reinforcing plate 13. The connecting flange 1301 located on one side is used to connect with the reinforcing sealing plate 11. The connecting flange 1301 located at the bottom is located on a portion of the base plate 1201 and is welded to both the base plate 1201 and the longitudinal beam body 1a. Of course, in specific implementations, the position and number of the connecting flanges 1301 can be adjusted according to connection requirements.

[0104] Furthermore, as a preferred embodiment, this embodiment also forms a groove 1302 on the reinforcing plate 13, within which the threaded sleeve 1202 is connected. The groove 1302 conforms to the shape of the threaded sleeve 1202, and for example, is an arc shape that matches the outer peripheral wall of the threaded sleeve 1202. This arrangement allows the reinforcing plate 13 and the threaded sleeve 1202 to fit snugly, facilitating their connection and ensuring the stability of the connection between them. Simultaneously, the groove 1302 also positions the reinforcing plate 13 during installation.

[0105] In this embodiment, the reinforcing plate 13 is preferably connected to the nut plate 12 and the longitudinal beam body 1a by MIG welding to further improve the connection strength.

[0106] In this embodiment, the vehicle body structure features a reinforcing plate 11 extending along the longitudinal direction of the vehicle within the rear floor longitudinal beam 1. This reinforcing plate 11 divides the rear floor longitudinal beam 1 into an upper cavity M and a lower cavity N, with the rear end of the reinforcing plate 11 corresponding to the front mounting portion of the rear subframe. This dual-cavity structure not only increases the structural strength of the rear floor longitudinal beam 1 and enhances its collision force transmission capability, but also improves the dynamic stiffness of the rear subframe mounting point, thereby improving the torsional performance of the rear of the vehicle and ultimately enhancing the overall collision safety.

[0107] When a vehicle collision occurs, taking a frontal collision as an example, it is still necessary to combine... Figure 14 As shown, the frontal collision force is transmitted rearward through the front bumper beam and the front engine compartment longitudinal beam 6. In addition to being transmitted rearward through the sill beam 4, it can also be transmitted rearward through the newly added front bulkhead longitudinal beam 5 and the front floor longitudinal beam 4. Furthermore, the collision force transmitted to the rear floor longitudinal beam 1 can also achieve dual-channel force transmission at the rear floor longitudinal beam 1 based on the upper and lower dual-cavity structure within it, thereby improving the collision force transmission effect and enhancing the overall vehicle collision safety.

[0108] Example 2

[0109] This embodiment relates to a vehicle that incorporates the body structure described in Embodiment 1. By incorporating the body structure of Embodiment 1, this vehicle increases the structural strength of the rear floor longitudinal beam 1, enhances its impact force transmission capability, and also improves the dynamic stiffness of the rear subframe mounting points, thereby improving the torsional performance of the rear of the vehicle and demonstrating excellent practicality.

[0110] 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 structure, characterized in that: Includes a rear floor longitudinal beam (1) and a reinforcing sealing plate (11) disposed within the rear floor longitudinal beam (1); The reinforcing sealing plate (11) extends along the front-rear direction of the vehicle and is divided into an upper cavity (M) and a lower cavity (N) located above and below the reinforcing sealing plate (11) in the rear floor longitudinal beam (1). The rear end of the reinforcing plate (11) is correspondingly provided with the front mounting part of the rear subframe in the rear floor longitudinal beam (1), and the front end of the reinforcing plate (11) extends out from the front end of the rear floor longitudinal beam (1). It also includes longitudinal beams (3) arranged side by side on the front floor inside the threshold beam (4); The longitudinal beam (3) on the front floor is located above the front floor (8) and extends along the front-rear direction of the vehicle; The front end of the longitudinal beam (3) on the front floor is connected to the front bulkhead longitudinal beam (5), the front bulkhead longitudinal beam (5) and the front engine compartment longitudinal beam (6) are connected in the front-rear direction of the whole vehicle, and the rear end of the longitudinal beam (3) on the front floor is connected to the front end of the reinforcing plate (11). The front end of the rear floor longitudinal beam (1) is connected to the rear floor front crossbeam (7), the end of the rear floor front crossbeam (7) is connected to the sill beam (4), and the reinforcing sealing plate (11) extends forward from the bottom of the rear floor front crossbeam (7) and is connected to the front floor longitudinal beam (3); and / or, An upper longitudinal beam cavity (S) is formed between the longitudinal beam (3) on the front floor and the front floor, and a front longitudinal beam cavity (Q) is formed between the front longitudinal beam (5) and the front lower plate (10). The front end of the upper longitudinal beam cavity (S) is connected to the front longitudinal beam cavity (Q), and the rear end of the upper longitudinal beam cavity (S) is connected to the lower cavity (N).

2. The vehicle body structure according to claim 1, characterized in that: The rear floor longitudinal beam (1) has a longitudinal beam body (1a) integrally formed in the rear floor frame (100) and a longitudinal beam cover plate (1b) covering the top of the longitudinal beam body (1a). The reinforcing sealing plate (11) and the front mounting part of the rear subframe are located inside the longitudinal beam body (1a), and the lower cavity (N) is formed between the longitudinal beam body (1a) and the reinforcing sealing plate (11), and the upper cavity (M) is formed between the longitudinal beam body (1a), the reinforcing sealing plate (11) and the longitudinal beam cover plate (1b).

3. The vehicle body structure according to claim 2, characterized in that: The rear floor frame (100) is integrally thermoformed, and the rear floor frame (100) also has a rear floor middle crossbeam (101) and a rear floor rear crossbeam (102) connected to the longitudinal beam body (1a). The front mounting part of the rear subframe is located in the area where the longitudinal beam body (1a) intersects and connects with the crossbeam (101) in the rear floor.

4. The vehicle body structure according to any one of claims 1 to 3, characterized in that: The rear subframe front mounting portion includes a nut plate (12) disposed within the lower cavity (N). The nut plate (12) is integrally formed, and the nut plate (12) has a base plate (1201) connected to the rear floor longitudinal beam (1), and a threaded sleeve (1202) with one end connected to the base plate (1201). The threaded sleeve (1202) is provided with a threaded connection hole (1203), which is provided through the bottom plate (1201), and the bottom of the rear floor longitudinal beam (1) is provided with a connection through hole corresponding to the threaded connection hole (1203).

5. The vehicle body structure according to claim 4, characterized in that: The end of the threaded sleeve (1202) away from the base plate (1201) passes through the reinforcing sealing plate (11) and extends into the upper cavity (M), and the threaded sleeve (1202) is connected to the reinforcing sealing plate (11).

6. The vehicle body structure according to claim 5, characterized in that: The distance between the end of the threaded sleeve (1202) that extends into the upper cavity (M) and the reinforcing sealing plate (11) is within 10 mm; The reinforcing sealing plate (11) is provided with reinforcing ribs at the part where the threaded sleeve (1202) extends into the upper cavity (M).

7. The vehicle body structure according to claim 6, characterized in that: The reinforcing rib includes an annular reinforcing rib body (1101) and a plurality of linear reinforcing rib bodies (1102) connected to the annular reinforcing rib body (1101). The annular reinforcing rib (1101) is arranged around the threaded sleeve (1202), and a plurality of linear reinforcing ribs (1102) are arranged radially with the annular reinforcing rib (1101) as the center.

8. The vehicle body structure according to claim 4, characterized in that: The rear subframe front mounting section also includes a reinforcing plate (13) located in the lower cavity (N). At least one side of the reinforcing plate (13) is connected to the rear floor longitudinal beam (1), and the reinforcing plate (13) is arranged side by side on one side of the threaded sleeve (1202), which is connected to the reinforcing plate (13).

9. The vehicle body structure according to claim 8, characterized in that: The reinforcing plate (13) is provided with a connecting flange (1301), and the reinforcing plate (13) is connected to the rear floor longitudinal beam (1) through the connecting flange (1301); and / or, A groove (1302) is formed on the reinforcing plate (13), and the threaded sleeve (1202) is connected in the groove (1302). The groove (1302) is shaped to conform to the threaded sleeve (1202).

10. The vehicle body structure according to claim 4, characterized in that: The base plate (1201) is spot welded to the rear floor longitudinal beam (1); and / or, the nut plate (12) is integrally stamped.

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

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