Vehicle body rear structure

Abstract

The application provides a vehicle body rear structure and a vehicle. The vehicle body rear structure comprises rear longitudinal beams arranged on left and right sides of the vehicle body, wherein each of the rear longitudinal beams comprises upper and lower longitudinal beams arranged in an upper-lower interval, and the rear end of the upper longitudinal beam is located behind the rear end of the lower longitudinal beam in the front-rear direction of the vehicle. The vehicle body rear structure further comprises rear crash beams connected to the rear ends of the upper longitudinal beams on the left and right sides, and connecting beams connecting the upper longitudinal beams and the lower longitudinal beams on each side. The vehicle body rear structure can increase the rigidity of the whole rear part of the vehicle body, form a collision force transmission network at the rear part of the vehicle body, help the collision force to be transmitted and dispersed to the front passenger cabin, improve the collision force transmission effect when the vehicle collides, and improve the collision safety of the vehicle.

Description

Technical Field

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

[0002] The rear main structure of a vehicle typically includes rear longitudinal beams, rear cross beams, rear shock absorber towers, and the rear suspension mounting structure. It not only serves to mount components such as the rear floor, rear bulkhead, rear shock absorbers, and rear suspension, but also, in the event of a collision, acts as the primary force transmission structure, directly impacting the overall vehicle's crash safety. Current rear vehicle structures still suffer from shortcomings in overall rigidity and a relatively simple force transmission channel, hindering the effective distribution and transfer of collision forces during a crash, thus negatively impacting overall vehicle crash safety. Summary of the Invention

[0003] In view of this, the present invention aims to propose a rear structure of the vehicle body to improve the overall vehicle collision safety.

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

[0005] A rear structure of a vehicle body includes rear longitudinal beams disposed on the left and right sides. Each of the rear longitudinal beams on both sides includes an upper longitudinal beam and a lower longitudinal beam arranged at intervals. In the longitudinal direction of the entire vehicle, the rear end of the upper longitudinal beam is located behind the rear end of the lower longitudinal beam.

[0006] It also includes a rear anti-collision beam connected to the rear end of the upper longitudinal beams on both sides, and a connecting beam connecting the upper longitudinal beams and the lower longitudinal beams on each side together.

[0007] Furthermore, each of the connecting beams on both sides includes a front connecting beam arranged near the front end of the rear longitudinal beam of the vehicle body, and a rear connecting beam connected to the rear end of the lower longitudinal beam, with the top of each rear connecting beam connected to the upper longitudinal beam on the same side.

[0008] Furthermore, the front connecting beam is inclined from bottom to top toward the rear of the vehicle; and / or, each of the rear connecting beams is arranged along the vertical direction of the entire vehicle, and the top of each of the rear connecting beams is connected to the bottom of the upper longitudinal beam on the same side.

[0009] Furthermore, each of the rear connecting beams on both sides is provided with a diagonal support beam on the side facing the rear of the vehicle. The bottom end of each diagonal support beam is connected to the rear connecting beam on the same side, and the top end of each diagonal support beam is connected to the upper longitudinal beam on the same side.

[0010] Furthermore, the top end of each of the inclined support beams is connected to the bottom of the upper longitudinal beam on the same side; and / or, the bottom end of each of the inclined support beams is connected to the rear end of the lower longitudinal beam on the same side in the front-rear direction of the vehicle.

[0011] Furthermore, the top of the upper longitudinal beams on both sides are provided with rear shock absorber towers, and the rear shock absorber towers on both sides are connected by a shock absorber tower crossbeam.

[0012] Furthermore, each of the rear shock absorber towers is made of extruded aluminum profiles, and each rear shock absorber tower is provided with a rear shock absorber mounting groove, within which a rear shock absorber mounting point is provided; and / or,

[0013] Each of the rear shock absorber towers is provided with a triangular reinforcing rib on the side facing the rear of the vehicle, and the reinforcing rib is connected between the upper longitudinal beam and the rear shock absorber tower.

[0014] Furthermore, both sides of the rear shock absorber towers are equipped with reinforcing brackets on the side facing the front of the vehicle. The reinforcing brackets are V-shaped and have inner and outer reinforcing beams.

[0015] The rear ends of the inner and outer reinforcing beams on each side are connected to the rear shock absorber tower on the same side, and the front ends of the inner and outer reinforcing beams on each side are connected to the upper crossbeam of the rear bulkhead located at the rear of the passenger compartment.

[0016] Furthermore, the rear end of each of the inner reinforcing beams is connected to the top of the rear shock absorber tower on the same side. In the vertical direction of the vehicle, the rear end of each of the outer reinforcing beams is lower than the rear end of the inner reinforcing beams on the same side, and the rear end of each of the outer reinforcing beams is connected to the front-facing end face of the rear shock absorber tower on the same side; and / or,

[0017] The inner reinforcing beams on both sides are connected to the upper crossbeam of the rear enclosure via the same connecting bracket.

[0018] Furthermore, a rear suspension mounting plate is connected between the upper and lower longitudinal beams on both sides, and the rear suspension mounting plate is provided with a rear suspension mounting point. The rear suspension mounting plate is also provided on both the front and rear sides of the rear shock absorber tower; and / or,

[0019] A rear lower crossbeam is connected between the lower longitudinal beams on both sides, and the rear lower crossbeam includes a front lower crossbeam located near the front end of the lower longitudinal beams on both sides, and a rear lower crossbeam connected between the rear ends of the lower longitudinal beams on both sides.

[0020] Furthermore, at least one of the upper longitudinal beam, the lower longitudinal beam, the rear anti-collision beam, and the connecting beam is made of extruded aluminum profile.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The rear vehicle structure described in this invention comprises upper and lower longitudinal beams, with connecting beams between them on each side. This not only increases the overall rigidity of the rear of the vehicle through the double-beam structure formed by the upper and lower longitudinal beams and the connecting beams, but also creates a dual-channel force transmission structure between the rear of the vehicle and the passenger compartment. The connecting beams also form a collision force transmission channel between the upper and lower longitudinal beams. Therefore, a collision force transmission network is formed at the rear of the vehicle, which helps to disperse rear-end collision forces towards the passenger compartment, improving the impact force transmission effect during a collision and thus enhancing overall vehicle collision safety.

[0023] Furthermore, the connecting beam consists of a front connecting beam and a rear connecting beam, which can respectively reinforce the front and rear positions of the rear longitudinal beam of the vehicle body. The front connecting beam slopes upwards towards the rear of the vehicle, which can guide the rear-end collision force downwards and help transfer the impact force to the lower sill beam. The rear connecting beam connects the rear end of the lower longitudinal beam to the upper longitudinal beam, which facilitates the connection and installation of the rear connecting beam. It also enables the rear connecting beam to act as a crash beam at the rear end of the lower longitudinal beam, so as to have a larger contact area with the colliding object and reduce collision damage.

[0024] By incorporating a diagonal support beam, the guiding effect of the beam allows for better transfer of impact force from the upper longitudinal beam to the lower longitudinal beam. This fully utilizes the upper and lower longitudinal beams for impact force transmission, thereby improving the impact force transmission effect at the rear of the vehicle. Connecting the top of the diagonal support beam to the bottom of the upper longitudinal beam facilitates the connection between the two beams while avoiding a side connection that could negatively impact the arrangement of surrounding components. Furthermore, ensuring the bottom of the diagonal support beam connects to the rear end of the lower longitudinal beam in the longitudinal direction of the vehicle guarantees the continuity of impact force transmission, further enhancing its effectiveness.

[0025] Secondly, the crossbeam between the two rear shock absorber towers helps improve the overall torsional stiffness of the rear of the vehicle. It also creates a lateral force transmission channel between the two towers, facilitating the transmission and decomposition of collision forces. The rear shock absorber towers are made of extruded aluminum profiles, which are simple to manufacture, have high structural strength, and are lightweight. This facilitates the production of the rear shock absorber towers while ensuring their structural strength, thus enabling lightweight design. The triangular reinforcing ribs between the rear shock absorber towers and the rear longitudinal beam improve the reliability of the towers on the rear longitudinal beam, thereby enhancing the stability of the rear shock absorber installation.

[0026] A reinforcing bracket consisting of inner and outer reinforcing beams is installed on the side of the rear shock absorber towers facing the front of the vehicle. This not only improves the rigidity of the rear of the vehicle and the connection strength between the rear of the vehicle and the passenger compartment by utilizing the upper crossbeam of the rear bulkhead, but also creates a force transmission channel between the rear longitudinal beams and the upper crossbeam of the rear bulkhead, helping to disperse the impact force between the passenger compartment and the rear longitudinal beams. The different heights of the rear ends of the inner and outer reinforcing beams allow the inner reinforcing beam to exert downward pressure on the rear shock absorber towers, while the outer reinforcing beam provides support. This helps improve the stability of the rear shock absorber towers and enhances their force transmission performance, thus improving the overall vehicle collision safety. The inner reinforcing beams on both sides are connected to the upper crossbeam of the rear bulkhead via the same connecting bracket, allowing the two reinforcing brackets to form a "W" shape, further enhancing the reinforcement effect of the two side reinforcing brackets and facilitating the connection between the reinforcing brackets and the upper crossbeam of the rear bulkhead.

[0027] In addition, the rear suspension mounting plate between the upper and lower longitudinal beams not only facilitates the installation of the rear suspension at the rear of the vehicle, but also increases the overall strength of the rear longitudinal beams and adds a collision force transmission channel between the upper and lower longitudinal beams. The rear lower crossbeam between the two lower longitudinal beams further improves the overall torsional rigidity of the rear of the vehicle, and also allows for better transmission and dispersal of collision forces between the two lower longitudinal beams, thereby reducing collision damage and improving overall vehicle collision safety.

[0028] The upper longitudinal beam, lower longitudinal beam, rear anti-collision beam, and connecting beam are made of extruded aluminum profiles. The characteristics of extruded aluminum profiles can be used to facilitate the preparation of each beam, ensure the structural strength of each beam, and also facilitate the lightweighting of each beam.

[0029] Another object of the present invention is to provide an automobile having a rear body structure as described above.

[0030] The automobile described in this invention, by incorporating the aforementioned rear body structure, can increase the overall rigidity of the rear body and form a collision force transmission network at the rear of the vehicle. This facilitates the transmission and dispersion of rear-end collision forces, improves the collision force transmission effect at the rear of the vehicle, enhances collision safety, and has excellent practicality. Attached Figure Description

[0031] 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:

[0032] Figure 1 This is a schematic diagram illustrating the arrangement of the rear structure of the vehicle body according to an embodiment of the present invention within the vehicle.

[0033] Figure 2This is a schematic diagram showing the connection between the rear structure of the vehicle body and the rear crossbeam of the passenger compartment as described in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the rear structure of the vehicle body according to an embodiment of the present invention;

[0035] Figure 4 for Figure 3 A schematic diagram of the structure shown from another perspective;

[0036] Figure 5 This is a schematic diagram of the rear longitudinal beam and rear shock absorber tower on one side of the vehicle body;

[0037] Figure 6 This is a schematic diagram of the structure of the rear shock absorber tower according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram illustrating the transmission of collision force during a rear-end collision of a vehicle, as described in an embodiment of the present invention.

[0039] Figure 8 This is a schematic diagram illustrating the transmission of collision force in the rear structure of the vehicle body during a rear-end collision, as described in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Rear longitudinal beam; 2. Rear shock absorber tower; 3. Shock absorber tower crossbeam; 4. Reinforcing bracket; 5. Passenger compartment; 6. Front connecting beam; 7. Rear connecting beam; 8. Diagonal support beam; 9. Rear bumper beam; 10. Rear suspension mounting plate; 11. Front lower crossbeam; 12. Rear lower crossbeam; 13. Reinforcing rib; 14. B-pillar; 15. Sill beam; 16. Center tunnel; 17. Rear bulkhead reinforcement plate;

[0042] 101. Upper longitudinal beam; 102. Lower longitudinal beam; 201. Rear shock absorber mounting slot; 202. Rear shock absorber mounting hole; 401. Inner reinforcing beam; 402. Outer reinforcing beam; 403. Connecting bracket; 501. Rear upper crossbeam; 502. Rear middle crossbeam; 503. Rear lower crossbeam; 1001. Reinforcing rib plate. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0044] 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.

[0045] 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.

[0046] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Example 1

[0048] This embodiment relates to a rear structure of a vehicle body, combined with Figures 1 to 4 As shown, it includes rear longitudinal beams 1 on the left and right sides of the vehicle body. Each rear longitudinal beam 1 includes an upper longitudinal beam 101 and a lower longitudinal beam 102 arranged at intervals. The rear structure of the vehicle body also includes a rear anti-collision beam 9 connected to the rear end of the upper longitudinal beams 101 on both sides, and a connecting beam that connects the upper longitudinal beams 101 and the lower longitudinal beams 102 on each side together.

[0049] At this point, the rear longitudinal beam 1 of the vehicle body is composed of an upper longitudinal beam 101 and a lower longitudinal beam 102, and a connecting beam is set between the upper and lower longitudinal beams on each side. This not only increases the overall rigidity of the rear of the vehicle body through the double beam structure formed by the upper and lower longitudinal beams and the connecting effect of the connecting beam, but also forms a double-channel force transmission structure between the rear of the vehicle body and the passenger compartment 5. The connecting beam can also form a collision force transmission channel between the upper and lower longitudinal beams, thereby forming a collision force transmission network at the rear of the vehicle body. This helps to transmit and disperse the collision force to the passenger compartment 5 in front, and can improve the collision force transmission effect during a collision.

[0050] Specifically, in the longitudinal direction of the vehicle, this embodiment also positions the rear end of the upper longitudinal beam 101 behind the rear end of the lower longitudinal beam 102, meaning the extension length of the upper longitudinal beam 101 towards the rear of the vehicle is greater than that of the lower longitudinal beam 102. Furthermore, the front ends of the upper longitudinal beams 101 on both sides are connected to the rear central crossbeam 502 located at the rear of the passenger compartment 5, and the front ends of each lower longitudinal beam 102 are connected to the rear ends of the sill beam 15 on the same side. The aforementioned rear central crossbeam 502 and the upper rear crossbeam 502 located above it are also connected via the B-pillars 14 on both sides. Below the rear central crossbeam 502, a lower rear crossbeam 503 is also provided, which connects between the rear ends of the sill beams 15 on both sides.

[0051] As a preferred implementation method, continue to refer to Figures 2 to 5 As shown, in this embodiment, the front portions of the upper longitudinal beams 101 and lower longitudinal beams 102 on each side are curved. Furthermore, viewed from the vertical direction of the vehicle, the curved portion of the front portion of the upper longitudinal beams 101 on each side is located inside the curved portion of the front portion of the lower longitudinal beam 102 on the same side in the horizontal direction of the vehicle. By setting the front portions of the upper longitudinal beams 101 and lower longitudinal beams 102 to be curved, the connection between the upper and lower longitudinal beams and the passenger compartment 5 structure is facilitated, and a weak stress point is avoided at the front of the rear longitudinal beam 1 of the vehicle body. Simultaneously, the fact that the curved portion of the front portion of the upper longitudinal beams 101 on each side is located inside the curved portion of the front portion of the lower longitudinal beam 102 on the same side also facilitates the separate connection of the upper and lower longitudinal beams and helps improve the force dispersion effect of the upper and lower longitudinal beams at the rear of the passenger compartment 5.

[0052] In this embodiment, as a preferred implementation, it is still composed of Figures 1 to 4 and combined Figure 5 As shown, the connecting beams provided between the upper and lower longitudinal beams on both sides include a front connecting beam 6 located near the front end of the rear longitudinal beam 1 of the vehicle body, and a rear connecting beam 7 connected to the rear end of the lower longitudinal beam 102. Furthermore, the front connecting beam 6 is also inclined from bottom to top towards the rear of the vehicle. In this way, by making the front connecting beam 6 inclined from bottom to top towards the rear of the vehicle, the rear-impact force can be guided downwards, helping to transfer the impact force to the sill beams 15 located on both sides of the passenger compartment 5, thereby reducing intrusion damage to the passenger compartment 5.

[0053] Furthermore, by simultaneously installing the aforementioned front connecting beam 6 and rear connecting beam 7, this embodiment can also strengthen the front and rear positions of the rear longitudinal beam 1 of the vehicle body, thereby improving the overall torsional rigidity of the rear of the vehicle body. In addition, in a specific design, each rear connecting beam 7 in this embodiment is arranged along the vertical direction of the entire vehicle, and the top of each rear connecting beam 7 is connected to the upper longitudinal beam 101 on the same side. Thus, by connecting the rear end of the lower longitudinal beam 102 to the upper longitudinal beam 101 through the rear connecting beam 7, the connection of the rear connecting beam 7 is facilitated, and the rear connecting beam 7 can also act as a crash beam at the rear end of the lower longitudinal beam 102, providing a larger contact area with the colliding object and thus reducing collision damage.

[0054] In this embodiment, based on the aforementioned rear connecting beam 7, as a preferred implementation, the rear connecting beam 7 also has a diagonal support beam 8 on the rear side facing the vehicle. This diagonal support beam 8 slopes upwards towards the rear of the vehicle, and its top end is connected to the upper longitudinal beam 101 on the same side. It can be understood that by providing the diagonal support beam 8 connecting the rear end of the lower longitudinal beam 102 and the upper longitudinal beam 102, the overall structural strength of the rear longitudinal beam 1 of the vehicle body can be increased through the double beam structure. Furthermore, the guiding effect of the diagonal support beam 8 allows the collision force at the upper longitudinal beam 101 to be better transferred to the lower longitudinal beam 102, fully utilizing the upper and lower longitudinal beams for collision force transmission, thereby improving the collision force transmission effect at the rear of the vehicle body.

[0055] In a specific implementation, preferably, the top ends of each side rear connecting beam 7 and each side inclined support beam 8 are connected to the bottom of the upper longitudinal beam 101 on the same side. This connection of the top ends of the rear connecting beam 7 and the inclined support beam 8 to the bottom of the upper longitudinal beam 101 facilitates the connection between the rear connecting beam 7 and the inclined support beam 8 and the upper longitudinal beam 101. Simultaneously, it is understood that this also avoids the adverse effects on the arrangement of surrounding components caused by the side connection of these two beams to the upper longitudinal beam 101.

[0056] Furthermore, in this embodiment, preferably, combined with Figure 2 , Figure 4 ,as well as Figure 5 As shown, the bottom end of each diagonal support beam 8 is also configured to connect with the rear end of the lower longitudinal beam 102 on the same side in the longitudinal direction of the vehicle. This connection means that the projections of the bottom end of the diagonal support beam 8 and the rear end of the lower longitudinal beam 102 on the same side in the longitudinal direction of the vehicle at least partially overlap. By connecting the bottom end of the diagonal support beam 8 with the rear end of the lower longitudinal beam 102 on the same side, the continuity of collision force transmission can be ensured, thereby further improving the collision force transmission effect.

[0057] In this embodiment, a rear shock absorber tower 2 is provided at the top of each side of the upper longitudinal beam 101. Preferably, in specific implementation, the rear shock absorber towers 2 on each side can be made of extruded aluminum profiles, for example. Furthermore, combined with... Figure 7 As shown, each rear shock absorber tower 2 is provided with a rear shock absorber mounting slot 201, and each rear shock absorber mounting slot 201 is also provided with a rear shock absorber mounting point.

[0058] At this point, by using extruded aluminum profiles to make the rear shock absorber tower 2, the simple manufacturing process, high structural strength, and light weight of extruded aluminum profiles can be utilized to facilitate the manufacturing of the rear shock absorber tower 2, while also ensuring the structural strength of the rear shock absorber tower 2 and facilitating its lightweight design.

[0059] In this embodiment, combined with Figure 6 As shown, the rear shock absorber tower 2, made of extruded aluminum, has a square structure and can be welded to the top of the rear longitudinal beam 1 of the vehicle body. Meanwhile, the rear shock absorber mounting groove 201 can be formed on the rear shock absorber tower 2 by machining after the rear shock absorber tower 2 has been extruded.

[0060] It should be noted that when machining the rear shock absorber mounting groove 201, a structure such as a mounting platform should be machined into the rear shock absorber mounting groove 201. At this time, the rear shock absorber mounting point can be installed as described above. Figure 5 The diagram shows a rear shock absorber mounting hole 202 located on the mounting platform. Specifically, there are two rear shock absorber mounting holes 202 arranged at intervals, with the openings facing the openings of the rear shock absorber mounting slots 201. In practice, the rear shock absorber can be installed in the rear shock absorber mounting slots 201 using bolts.

[0061] In this embodiment, since the rear shock absorber tower 2 is located on the top of the rear longitudinal beam of the vehicle body, as a preferred embodiment, a triangular reinforcing rib 13 is provided on the rear side of each rear shock absorber tower 2, that is, on the rear side of the rear shock absorber tower 2. The reinforcing ribs 13 at each rear shock absorber tower 2 can generally be arranged in a row of multiple ribs, and each reinforcing rib 13 can be connected between the rear longitudinal beam 1 of the vehicle body and the rear shock absorber tower 2. It is understood that by providing the aforementioned triangular reinforcing ribs 13 between the rear shock absorber tower 2 and the rear longitudinal beam 1 of the vehicle body, the reliability of the rear shock absorber tower 2 installed on the rear longitudinal beam 1 of the vehicle body can be improved, thereby enhancing the stability of the rear shock absorber installation.

[0062] Continue as Figures 1 to 4As shown in the diagram, in this embodiment, a shock absorber crossbeam 3 is also connected between the left and right rear shock absorber towers 2. The presence of the shock absorber crossbeam 3 between the two rear shock absorber towers 2 helps to improve the overall torsional stiffness of the rear of the vehicle body, and also forms a lateral force transmission channel between the two rear shock absorber towers 2, which facilitates the transmission and decomposition of collision forces. The shock absorber crossbeam 3 can be connected to the two rear shock absorber towers 2 using conventional screwing or welding methods. Preferably, the shock absorber crossbeam 3 can also be configured to connect to the top of each rear shock absorber tower 2 to facilitate the connection between them.

[0063] In a preferred embodiment, this example provides reinforcing brackets 4 on the side of both rear shock absorber towers 2 facing the front of the vehicle. Each reinforcing bracket 4 is V-shaped and has an inner reinforcing beam 401 and an outer reinforcing beam 402. The front ends of both the inner and outer reinforcing beams 401 and 402 are connected to the upper crossbeam 501 of the rear bulkhead located at the rear of the passenger compartment 5. The rear ends of the inner reinforcing beams 401 are connected to the top of the rear shock absorber tower 2 on the same side, and the rear ends of the outer reinforcing beams 402 are connected to the side of the rear shock absorber tower 2 on the same side. Furthermore, in the vertical direction of the vehicle, the rear ends of each outer reinforcing beam 402 are positioned lower than the rear ends of the inner reinforcing beams 401 on the same side.

[0064] At this point, a reinforcing bracket 4, consisting of an inner reinforcing beam 401 and an outer reinforcing beam 402, is installed on the side of the rear shock absorber towers 2 facing the front of the vehicle. The front ends of the inner and outer reinforcing beams 401 and 402 are connected to the upper crossbeam 501 of the rear bulkhead, and the rear ends of the inner and outer reinforcing beams 401 and 402 are connected to the front shock absorber tower 2. The rear end of the outer reinforcing beam 402 is positioned lower than the rear end of the inner reinforcing beam 401. This embodiment not only improves the rigidity of the rear part of the vehicle body and the connection strength between the rear part of the vehicle body and the passenger compartment 5 by means of the upper crossbeam 501, but also forms a force transmission channel between the rear longitudinal beam 1 and the upper crossbeam 501, which helps to disperse the collision force between the passenger compartment 5 and the rear longitudinal beam 1.

[0065] Furthermore, it is understood that in this embodiment, the inner reinforcing beam 401 and the outer reinforcing beam 402 in each reinforcing bracket 4 are at different heights at the ends connected to the rear shock absorber tower 2. This also enables the inner reinforcing beam 401 connected to the top of the rear shock absorber tower 2 to exert a downward pressure on the rear shock absorber tower 2, thereby helping to improve the stability of the rear shock absorber tower 2.

[0066] As a preferred implementation method, continue to combine Figures 1 to 4As shown, in this embodiment, the inner reinforcing beams 401 on both sides are connected to the upper crossbeam 501 of the rear enclosure via the same connecting bracket 403. This connection allows the inner reinforcing beams 401 on both sides to form a "W"-shaped structure, further improving the reinforcing effect of the reinforcing brackets 4 and facilitating the connection between the reinforcing brackets 4 and the upper crossbeam 501 of the rear enclosure.

[0067] In specific implementation, the aforementioned connecting bracket 403 can be made of aluminum alloy sheet and welded to the inner reinforcing beams 401 on both sides. Furthermore, as a preferred embodiment, the rear end of each outer reinforcing beam 402 is specifically connected to the end face of the front shock absorber tower 2 facing the front of the vehicle on the same side. In this case, the outer reinforcing beam 402 connected to the front end face of the rear shock absorber tower 2 not only provides support to the rear shock absorber tower 2 from the front, but also helps improve the reliability of the rear shock absorber tower 2 installation.

[0068] Furthermore, based on the aforementioned arrangement of the reinforcing ribs 13 located on the rear side of each rear shock absorber tower 2, it is clear that the reinforcing ribs 13 and the outer reinforcing beam 402 on the same side can clamp the rear shock absorber tower 2 on the same side in the longitudinal direction. Therefore, the stability of the rear shock absorber tower 2 can be better increased by utilizing the reinforcing ribs 13 and the outer reinforcing beam 402 on both sides, and the force transmission effect of each reinforcing rib 13 can also better improve the transmission effect of rear-impact collision force between the rear longitudinal beam 1, the rear shock absorber tower 2, and the outer reinforcing beam 402.

[0069] It should be noted that the upper longitudinal beam 101, lower longitudinal beam 102, rear anti-collision beam 9, front connecting beam 6, rear connecting beam 7, as well as the diagonal support beam 8, inner reinforcing beam 401, and outer reinforcing beam 402 described in this embodiment can all adopt beam structures commonly found in existing automobile bodies. Furthermore, as a preferred embodiment, at least one of the above-mentioned upper longitudinal beam 101, lower longitudinal beam 102, rear anti-collision beam 9, front connecting beam 6, rear connecting beam 7, diagonal support beam 8, inner reinforcing beam 401, and outer reinforcing beam 402 can be specifically made of extruded aluminum profiles. Of course, preferably, all of the above beams can be made of extruded aluminum profiles. Furthermore, the following rear lower crossbeams are also preferably made of extruded aluminum profiles.

[0070] In this embodiment, each of the above-mentioned beams is made of extruded aluminum profiles. The characteristics of extruded aluminum profiles can be used to facilitate the preparation of each beam, ensure the structural strength of each beam, and also facilitate the lightweighting of each beam.

[0071] Continue to refer to Figures 1 to 5As shown in the preferred embodiment, this embodiment has a rear suspension mounting plate 10 connected between the upper longitudinal beam 101 and the lower longitudinal beam 102 on both sides, and a rear suspension mounting point is provided on the rear suspension mounting plate 10. The aforementioned rear suspension mounting plate 10 is also provided on both the front and rear sides of the rear shock absorber tower 2. In this case, the rear suspension mounting plates 10 on each side of the rear shock absorber tower 2 are generally multiple, and usually the rear suspension mounting plates 10 should be arranged in pairs, with the two rear suspension mounting plates 10 in each pair spaced apart, for the installation of various components in the rear suspension.

[0072] In specific implementation, each rear suspension mounting plate 10 is preferably made of aluminum alloy plate and connected to the upper longitudinal beam 101 and the lower longitudinal beam 102 by welding. The rear suspension mounting points on the rear suspension mounting plates 10 are typically mounting holes provided on the rear suspension mounting plates 10. Furthermore, to increase the reliability of the rear suspension mounting plates 10, it is preferable to provide reinforcing ribs 1001 at each rear suspension mounting plate 10 to strengthen it. The aforementioned reinforcing ribs 1001 can also be made of aluminum alloy plate.

[0073] It is understandable that by setting the rear suspension mounting plate 10 between the upper longitudinal beam 101 and the lower longitudinal beam 102, it is not only convenient to install the rear suspension at the rear of the vehicle, but also to increase the overall strength of the rear longitudinal beam 1 of the vehicle body and to increase the collision force transmission channel between the upper and lower longitudinal beams, which is conducive to improving the collision safety of the whole vehicle.

[0074] Continue as Figure 3 and Figure 4 As shown in the illustration, in this preferred embodiment, a rear lower crossbeam is further connected between the two lower longitudinal beams 102. Specifically, this rear lower crossbeam includes a front lower crossbeam 11 located near the front end of the two lower longitudinal beams 102, and a rear lower crossbeam 12 connected between the rear ends of the two lower longitudinal beams 102. The front lower crossbeam 11 and the rear lower crossbeam 12 are connected to the two lower longitudinal beams 102 by welding. To increase the reliability of the connection, connecting ribs can also be provided between each rear lower crossbeam and the lower longitudinal beam 102.

[0075] By setting the rear lower crossbeams as described above between the lower longitudinal beams 102 on both sides, this embodiment can further improve the overall torsional stiffness of the rear of the vehicle body. At the same time, it can also better transmit and decompose the collision force between the lower longitudinal beams 102 on both sides, thereby reducing collision damage and improving the overall vehicle collision safety.

[0076] In this embodiment, continue as follows Figure 7As shown, when a rear-end collision occurs, for the rear longitudinal beams 1 on each side of the vehicle body, the collision force is first transmitted from the rear anti-collision beam 9 to the upper longitudinal beam 101 in the rear longitudinal beam 1. Then, part of the collision force is transmitted along the upper longitudinal beam 101 to the rear central crossbeam 502 in front, while another part of the collision force can be transmitted to the lower longitudinal beam 102 under the guidance of the diagonal support beam 8, and then continue to be transmitted along the lower longitudinal beam 102 to the sill beam 15 in front.

[0077] Moreover, combined with Figure 8 As shown, the impact force transmitted along the upper longitudinal beams 101 on both sides can be further transmitted forward at each rear shock absorber tower 2 via the reinforcing bracket 4 on the same side. The impact force transmitted along the inner reinforcing beam 401 can be transmitted to the central channel 16 via the rear upper crossbeam 501 and the rear reinforcing plate 17, thus dispersing and absorbing the impact force through the central channel 16 and the surrounding structure. The impact force transmitted along the outer reinforcing beam 402 is transmitted to the B-pillar 14 via the rear upper crossbeam 501, and can also be transmitted to the sill beam 15 on the same side via the B-pillar 14, thus dispersing and absorbing the impact force through the sill beam 15 and the surrounding structure.

[0078] Of course, in the event of a frontal collision, the impact force can be transmitted to the reinforcing brackets 4 through the central channel 16, the rear reinforcement plate 17, the side sill beams 15, the B-pillars 14, and the roof beam, and then transmitted to the rear longitudinal beams 1 through the reinforcing brackets 4. This embodiment disperses the impact force through the force transmission channels formed by the aforementioned force transmission structures, effectively dispersing and mitigating the impact force in a rear-end collision. Combined with the crumple zone energy absorption of the rear anti-collision beam 9 and the rear longitudinal beams 1, this significantly improves the overall vehicle collision safety.

[0079] In this embodiment, the rear structure of the vehicle body consists of an upper longitudinal beam 101 and a lower longitudinal beam 102, with connecting beams between the upper and lower longitudinal beams on each side. This structure not only increases the overall rigidity of the rear of the vehicle body through the double beam structure formed by the upper and lower longitudinal beams and the connecting effect of the connecting beams, but also allows the upper and lower longitudinal beams to form a double-channel force transmission structure between the rear of the vehicle body and the passenger compartment 5. The connecting beams can also form a collision force transmission channel between the upper and lower longitudinal beams.

[0080] In summary, this embodiment can form a collision force transmission network at the rear of the vehicle, which helps to transmit and disperse the rear collision force to the front passenger compartment 5, improves the collision force transmission effect during a vehicle collision, enhances the overall vehicle collision safety, and has good practicality.

[0081] Example 2

[0082] This embodiment relates to a car, the rear body structure of which is provided in Embodiment 1.

[0083] By incorporating the rear structure of the vehicle body as described in Embodiment 1, the overall rigidity of the rear of the vehicle body can be increased, and a collision force transmission network can be formed at the rear of the vehicle body. This helps to disperse the rear collision force towards the passenger compartment 5, thereby improving the collision force transmission effect during a collision and enhancing the overall vehicle collision safety. It has excellent practicality.

[0084] 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 rear structure of a vehicle body, characterized in that: The vehicle includes rear longitudinal beams (1) on the left and right sides respectively. Each of the rear longitudinal beams (1) on both sides includes an upper longitudinal beam (101) and a lower longitudinal beam (102) arranged at intervals. In the front-rear direction of the vehicle, the rear end of the upper longitudinal beam (101) is located behind the rear end of the lower longitudinal beam (102). It also includes a rear anti-collision beam (9) connected to the rear end of the upper longitudinal beams (101) on both sides, and a connecting beam that connects the upper longitudinal beams (101) and the lower longitudinal beams (102) on each side together; The top of the upper longitudinal beams (101) on both sides is provided with a rear shock absorber tower (2), and the rear shock absorber towers (2) on both sides are connected by a shock absorber tower crossbeam (3); the rear shock absorber towers (2) on both sides are provided with a reinforcing bracket (4) facing the front of the vehicle. The reinforcing bracket (4) is "V" shaped and has an inner reinforcing beam (401) and an outer reinforcing beam (402); the rear ends of the inner reinforcing beam (401) and the outer reinforcing beam (402) on each side are connected to the rear shock absorber tower (2) on the same side, and the front ends of the inner reinforcing beam (401) and the outer reinforcing beam (402) on each side are connected to the rear upper crossbeam (501) located at the rear of the passenger compartment (5); The rear end of each inner reinforcing beam (401) is connected to the top of the rear shock absorber tower (2) on the same side. In the vertical direction of the whole vehicle, the rear end of each outer reinforcing beam (402) is set lower than the rear end of the inner reinforcing beam (401) on the same side, and the rear end of each outer reinforcing beam (402) is connected to the end face of the rear shock absorber tower (2) on the same side facing the front of the vehicle.

2. The rear structure of the vehicle body according to claim 1, characterized in that: Both sides of the connecting beam include a front connecting beam (6) arranged near the front end of the rear longitudinal beam (1) of the vehicle body, and a rear connecting beam (7) connected to the rear end of the lower longitudinal beam (102). The top of each of the rear connecting beams (7) is connected to the upper longitudinal beam (101) on the same side.

3. The rear structure of the vehicle body according to claim 2, characterized in that: The front connecting beam (6) is inclined from bottom to top toward the rear of the vehicle; and / or, each of the rear connecting beams (7) is arranged along the vertical direction of the vehicle, and the top of each of the rear connecting beams (7) is connected to the bottom of the upper longitudinal beam (101) on the same side.

4. The rear structure of the vehicle body according to claim 2, characterized in that: Both sides of the rear connecting beam (7) are provided with inclined support beams (8) on the side facing the rear of the vehicle. The bottom end of each inclined support beam (8) is connected to the rear connecting beam (7) on the same side, and the top end of each inclined support beam (8) is connected to the upper longitudinal beam (101) on the same side.

5. The rear structure of the vehicle body according to claim 4, characterized in that: The top end of each of the inclined support beams (8) is connected to the bottom of the upper longitudinal beam (101) on the same side; and / or, the bottom end of each of the inclined support beams (8) is connected to the rear end of the lower longitudinal beam (102) on the same side in the front-rear direction of the vehicle.

6. The rear structure of the vehicle body according to claim 1, characterized in that: Each of the rear shock absorber towers (2) is made of extruded aluminum profiles, and each of the rear shock absorber towers (2) is provided with a rear shock absorber mounting groove (201), and a rear shock absorber mounting point is provided in the rear shock absorber mounting groove (201); and / or, Each of the rear shock absorber towers (2) is provided with a triangular reinforcing rib (13) on the side facing the rear of the vehicle. The reinforcing rib (13) is connected between the upper longitudinal beam (101) and the rear shock absorber tower (2).

7. The rear structure of the vehicle body according to claim 1, characterized in that: The inner reinforcing beams (401) on both sides are connected to the upper crossbeam (501) of the rear enclosure through the same connecting bracket (403).

8. The rear structure of the vehicle body according to claim 1, characterized in that: A rear suspension mounting plate (10) is connected between the upper longitudinal beam (101) and the lower longitudinal beam (102) on both sides. The rear suspension mounting plate (10) is provided with a rear suspension mounting point, and the rear suspension mounting plate (10) is provided on both the front and rear sides of the rear shock absorber tower (2); and / or, A rear lower crossbeam is connected between the two lower longitudinal beams (102), and the rear lower crossbeam includes a front lower crossbeam (11) located near the front end of the two lower longitudinal beams (102) and a rear lower crossbeam (12) connected between the rear ends of the two lower longitudinal beams (102).

9. The rear structure of the vehicle body according to any one of claims 1 to 8, characterized in that: At least one of the upper longitudinal beam (101), the lower longitudinal beam (102), the rear anti-collision beam (9), and the connecting beam is made of extruded aluminum profile.

10. A car, characterized in that: The vehicle body is provided with a rear body structure as described in any one of claims 1 to 9.

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