Front cabin connecting structure and vehicle

Abstract

The invention provides a front cabin connecting structure and a vehicle. The front cabin connecting structure comprises a front longitudinal beam and a front wheel cover side reinforcing beam assembly. The front wheel cover side reinforcing beam assembly comprises a side reinforcing beam, a front reinforcing cavity and a rear reinforcing cavity. The side reinforcing beam is located above the front longitudinal beam and connected with the front longitudinal beam through the front reinforcing cavity and the rear reinforcing cavity. By arranging the front reinforcing cavities and the rear reinforcing cavities which are connected with the side reinforcing beams and the front longitudinal beams, supporting is provided, a force transmission path is formed, stress can be effectively dispersed, meanwhile, resonance at the position of a wheel cover is reduced, and the overall torsional rigidity of a vehicle body is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a front cabin connection structure and a vehicle. Background Art

[0002] As people's living standards improve, consumers have higher and higher requirements for automobile quality. As the part that indirectly contacts the driver and passengers, the front cabin connection structure is increasingly concerned by consumers for its safety and quietness. At the same time, as the most important component of the overall structure body, the front cabin connection structure, with its efficient and excellent structure, can not only provide high rigidity, improve durability, NVH, VD and collision safety performance, but also improve the body's bending and torsional rigidity, mode, NTF / VTF (Noise Transfer Function / Vibration Transfer Function), etc.

[0003] The existing front engine room connection structure is usually composed of the left front wheel cover side reinforcement beam outer plate, the front section of the left front wheel cover side reinforcement beam outer plate, the front wheel cover front connection plate, the left front wheel cover side reinforcement beam outer plate, the fender middle fixing bracket and the front fender lining mounting bracket, etc. These parts form a large bull horn-shaped frame. The front section of the left front wheel cover side reinforcement beam outer plate extends downward and connects to the root of the front anti-collision beam assembly, transmitting the positive impact force to the A-pillar area, thereby dispersing it to various parts of the vehicle body. The transmission channel is smooth, but the positive force received by the left front wheel cover side reinforcement beam cannot be fully utilized. At the same time, the rigidity of the front engine room assembly is poor, there is no stable force transmission channel, and the upper and lower connections are not stable enough, which affects the torsional performance of the vehicle; and there are many parts and the structure is complex.

[0004] In order to meet the performance requirements and layout requirements of the vehicle body torsional stiffness, NVH road noise, durability, safety, installation point dynamic stiffness, etc., the front cabin connection structure is generally designed with a large cavity and a complex reinforcement structure. According to CAE topology optimization analysis, the larger the cavity area, the more effective the force transmission path. However, if multiple objectives are not considered comprehensively, a lot of layout space will be wasted, the cavity overlap will be discontinuous, and the existing structural space can only be continuously patched and strengthened, resulting in low energy transfer efficiency and force transmission efficiency, complex manufacturing and high cost, and poor performance in various aspects.

[0005] Therefore, it is necessary to provide an improved front cabin connection structure and a vehicle to solve the above problems. Summary of the invention

[0006] The present application provides a front cabin connection structure and a vehicle that can improve force transmission efficiency and torsional stiffness.

[0007] An embodiment of the present application provides a front cabin connection structure, including a front longitudinal beam and a front wheel cover side reinforcement beam assembly; the front wheel cover side reinforcement beam assembly includes a side reinforcement beam, a front reinforcement cavity and a rear reinforcement cavity; the side reinforcement beam is located above the front longitudinal beam and is connected to the front longitudinal beam through the front reinforcement cavity and the rear reinforcement cavity.

[0008] Furthermore, the front longitudinal beam, the side reinforcement beam, the front reinforcement cavity and the rear reinforcement cavity together form a frame structure.

[0009] Furthermore, the front reinforcement cavity is arranged at the front ends of the front longitudinal beam and the side reinforcement beam; the lower part of the front reinforcement cavity is connected to the top wall and the inner wall of the front longitudinal beam; the upper part of the front reinforcement cavity is connected to the inner wall and the bottom wall of the side reinforcement beam.

[0010] Furthermore, the front reinforcement cavity includes an inner connecting plate and a side connecting plate, and the inner connecting plate and the side connecting plate together form a front cavity; the inner connecting plate is connected to the inner side wall and top wall of the front longitudinal beam and the inner side wall and bottom wall of the side reinforcement beam; the side connecting plates are respectively connected to the top wall of the front longitudinal beam and the bottom wall of the side reinforcement beam.

[0011] Furthermore, the rear reinforcement cavity is arranged behind the front reinforcement cavity; the lower part of the rear reinforcement cavity is connected to the outer side wall of the front longitudinal beam; the upper part of the rear reinforcement cavity is connected to the inner side wall and bottom wall of the side reinforcement beam.

[0012] Furthermore, the rear reinforcement cavity includes a front reinforcement member, a rear connecting plate and a front upper cover plate; the front reinforcement member, the rear connecting plate and the front upper cover plate are overlapped in pairs to form a rear cavity.

[0013] Furthermore, the front reinforcement is located on the front side of the rear connecting plate, and the front upper cover plate is arranged on the inner side of the front reinforcement and the rear connecting plate; the front reinforcement, the rear connecting plate and the front upper cover plate are all welded to the outer side wall of the front longitudinal beam and the inner side wall or bottom wall of the side reinforcement beam.

[0014] Furthermore, it also includes a front anti-collision beam assembly, which includes a front anti-collision beam body and energy absorption boxes arranged on both sides of the front anti-collision beam body; the rear part of the energy absorption box protrudes into the front longitudinal beam, and the energy absorption box and the front longitudinal beam are fixed by bolts.

[0015] Furthermore, the lower portion of the front reinforcement cavity is also fixed to the front longitudinal beam and the energy absorption box by means of the bolts.

[0016] Furthermore, it also includes an upper cross beam, which includes a main body portion perpendicular to the front longitudinal beam and connecting portions located on both sides of the main body portion and inclined relative to the main body portion; the side reinforcement beam is offset outward and rearward relative to the front longitudinal beam; and the connecting portion is connected to the front portion of the side reinforcement beam.

[0017] Furthermore, it also includes a shock absorber seat and a shock absorber seat connecting crossbeam, the shock absorber seat includes a front wheel cover and a shock absorber mounting plate; the rear part of the front longitudinal beam is connected to the inner side of the front wheel cover; the side reinforcement beam is connected to the outer side of the front wheel cover; the two ends of the shock absorber seat connecting crossbeam are respectively connected to the shock absorber seat; the rear reinforcement cavity is connected to the front side of the front wheel cover.

[0018] Furthermore, the side reinforcement beam includes a side reinforcement beam outer plate, a front section of the side reinforcement beam outer plate and a side reinforcement beam inner plate; the side reinforcement beam outer plate and the front section of the side reinforcement beam outer plate are arranged along the front-to-back direction, and the side reinforcement beam inner plate is arranged on the inner side of the side reinforcement beam outer plate and the front section of the side reinforcement beam outer plate; the side reinforcement beam outer plate, the front section of the side reinforcement beam outer plate and the side reinforcement beam inner plate together form a cavity.

[0019] An embodiment of the present application further provides a vehicle, comprising the above-mentioned front cabin connection structure.

[0020] The side reinforcement beam of the present application is located above the front longitudinal beam and is connected to the front longitudinal beam through the front reinforcement cavity and the rear reinforcement cavity. The two cavities provide Z-direction support for the side reinforcement beam, which can reduce the resonance at the wheel arch and improve the overall torsional stiffness of the vehicle body. At the same time, the front reinforcement cavity, the rear reinforcement cavity, the front longitudinal beam and the side reinforcement beam jointly form a force transmission path, which can effectively disperse the force and improve the force transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2 is a perspective view of a front cabin connection structure according to an exemplary embodiment of the present application.

[0022] Figure 2 yes Figure 1 A top view of the front cabin connection structure is shown.

[0023] Figure 3 yes Figure 1 A partial perspective view of the front cabin connection structure is shown.

[0024] Figure 4 yes Figure 3 A perspective view of the front cabin connection structure from another perspective is shown.

[0025] Figure 5 yes Figure 3 A perspective view of the front cabin connection structure from another perspective is shown.

[0026] Figure 6 yes Figure 1 A partial three-dimensional view of the rear reinforcement cavity of the front cabin connection structure is shown.

[0027] Figure 7 yes Figure 5 A partial three-dimensional view of the front reinforcement cavity of the front cabin connection structure is shown.

[0028] Figure 8 yes Figure 7 A three-dimensional view of the front reinforcement cavity is shown.

[0029] Fig. 9 yes Figure 8 A perspective view of the inner connecting plate shown.

[0030] Fig.10 yes Figure 8 A perspective view of the side connecting plate shown.

[0031] Fig.11 It is a three-dimensional diagram of the front reinforcement cavity and the rear reinforcement cavity after assembly.

[0032] Fig.12 yes Fig.11 A stereoscopic view from another perspective of the front reinforcement cavity and the rear reinforcement cavity after being assembled.

[0033] Fig.13 yes Fig.11 A stereoscopic view from another perspective of the front reinforcement cavity and the rear reinforcement cavity after being assembled.

[0034] Fig.14 yes Fig.11 A perspective view of the front reinforcement is shown.

[0035] Fig.15 yes Fig.11 A perspective view of the rear connecting plate is shown.

[0036] Fig.16 yes Fig.11 A perspective view of the front upper cover shown.

[0037] Description of Figure Numbers:

[0038] 10. Front longitudinal beam; 11. Top wall; 12. Inner side wall; 13. Outer side wall; 14. Upper flange; 20. Front wheel housing side reinforcement beam assembly; 21. Side reinforcement beam; 211. Side reinforcement beam outer plate; 212. Side reinforcement beam outer plate front section; 213. Side reinforcement beam inner plate; 2131. Inner side wall; 2132. Bottom wall; 214. Cavity; 22. Front reinforcement cavity; 221. Inner connecting plate; 2 211, main board; 2212, side board; 2213, connecting piece; 2214, first mounting hole; 2215, through hole; 222, side connecting plate; 2221, main board; 2222, upper flange; 2223, lower flange; 2224, front fold; 2225, rear fold; 2226, second mounting hole; 223, front cavity; 23, rear reinforcement cavity; 231, Front reinforcement; 2311, first main board; 2312, second main board; 2313, connection; 2314, upper flange; 2315, side flange; 232, rear connection plate; 2321, main board; 2322, upper flange; 2323, lower flange; 2324, front fold; 2325, rear fold; 233, front upper cover; 2331, main board; 2332, upper flange ; 2333, lower flange; 2334, front folding edge; 2335, rear folding edge; 234, rear cavity; 30, front anti-collision beam assembly; 31, front anti-collision beam body; 32, energy absorption box; 321, bolt; 40, upper crossbeam; 41, main body; 42, connecting part; 50, cavity; 60, shock absorber seat; 61, front wheel cover; 62, shock absorber mounting plate; 70, shock absorber seat connecting crossbeam. DETAILED DESCRIPTION

[0039] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0040] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0041] See also Figures 1 to 3As shown, the present application provides a front cabin connection structure, including a front longitudinal beam 10 and a front wheel housing side reinforcement beam assembly 20. The front wheel housing side reinforcement beam assembly 20 includes a side reinforcement beam 21, a front reinforcement cavity 22 and a rear reinforcement cavity 23. The side reinforcement beam 21 is located above the front longitudinal beam 10 and is connected to the front longitudinal beam 10 through the front reinforcement cavity 22 and the rear reinforcement cavity 23.

[0042] By providing the front reinforcement cavity 22 and the rear reinforcement cavity 23, the torsional stiffness of the vehicle and the mode at the wheel housing can be effectively improved, while the resonance at the wheel housing is reduced and the torsional stiffness of the vehicle body as a whole is improved. The side reinforcement beam 21 is located above the front longitudinal beam 10 and is connected to the front longitudinal beam 10 through the front reinforcement cavity 22 and the rear reinforcement cavity 23, providing a new force transmission path, which can effectively disperse the force, improve the force transmission efficiency, and increase the fatigue endurance life, meeting the performance requirements of the vehicle under various extreme working conditions.

[0043] The front longitudinal beam 10, the side reinforcement beam 21, the front reinforcement cavity 22 and the rear reinforcement cavity 23 are arranged in a ring-shaped frame structure, and together form a frame structure 50, thereby forming a ring-shaped force transmission path. The structure near the cavity 50 takes into account the connection in the three directions of X, Y, and Z to improve the local stiffness. While ensuring the continuity of the force transmission path, the area of ​​the cavity 50 is minimized as much as possible to increase the lower layout space to meet the vehicle's headlight layout space requirements and lightweight requirements; at the same time, the Z direction is parallel to meet the installation requirements.

[0044] The moment of inertia and cross-sectional area of ​​cavity 50 are used to transmit energy, disperse force and improve the performance of the front wheel cover assembly. According to CAE topology optimization analysis, cavity 50 makes the force transmission path of the front cabin connection structure effective, which makes a great contribution to the suppression of NVH road noise and vibration, and plays a decisive role in safety and durability.

[0045] The front engine room connection structure also includes a front anti-collision beam assembly 30 and an upper cross beam 40. The head-on collision force from the front of the vehicle is transmitted to the rear of the vehicle body through the front anti-collision beam assembly 30, the upper cross beam 40, the front longitudinal beam 10 and the side reinforcement beam 21 in sequence.

[0046] The front anti-collision beam assembly 30 includes a front anti-collision beam body 31 and energy absorption boxes 32 arranged on both sides of the front anti-collision beam body 31. The rear portion of the energy absorption box 32 protrudes into the front longitudinal beam 10, and the energy absorption box 32 and the front longitudinal beam 10 are fixed by bolts 321.

[0047] The upper cross beam 40 includes a main body 41 perpendicular to the front longitudinal beam 10 and connecting parts 42 located on both sides of the main body 41 and inclined relative to the main body 41. The side reinforcement beam 21 is first offset outward and then protrudes backward relative to the front longitudinal beam 10. The connecting part 42 is connected to the front part of the side reinforcement beam 21.

[0048] The offset setting of the side reinforcement beam 21 enables it to better absorb the impact force from the side, disperse the collision energy, and further enhance the safety of the vehicle during a collision. At the same time, the side reinforcement beam 21 is raised in the Z direction through two cavities, which saves a large layout space and is conducive to the layout of the vehicle's headlights and engine hood locks.

[0049] The front cabin connection structure also includes a shock absorber seat 60 and a shock absorber seat connecting crossbeam 70, and the shock absorber seat 60 includes a front wheel cover 61 and a shock absorber mounting plate 62. The rear portion of the front longitudinal beam 10 is connected to the inner side of the front wheel cover 61. The side reinforcement beam 21 is connected to the outer side of the front wheel cover 61. The two ends of the shock absorber seat connecting crossbeam 70 are respectively connected to the shock absorber seat 60. The rear reinforcement cavity 23 is connected to the front side of the front wheel cover 61. The upper crossbeam 40 and the two side reinforcement beams 21 on both sides thereof can form a semi-annular force transmission structure, and the upper crossbeam 40 and the side reinforcement beams 21 on both sides thereof further form a closed annular frame structure together with the shock absorber seat connecting crossbeam 70 and the shock absorber seats 60 on both sides thereof; the force transmission in all directions can be dispersed, thereby improving the torsional rigidity of the vehicle body as a whole.

[0050] See also Figures 4 to 7 As shown, the front longitudinal beam 10 includes a top wall 11, an inner side wall 12, an outer side wall 13 and an upper flange 14 fixed together. The front reinforcement cavity 22 is arranged at the front end of the front longitudinal beam 10 and the side reinforcement beam 21. The lower part of the front reinforcement cavity 22 is connected to the top wall 11 and the inner side wall 12 of the front longitudinal beam 10. The upper part of the front reinforcement cavity 22 is connected to the inner side wall 2131 and the bottom wall 2132 of the side reinforcement beam 21.

[0051] The front reinforcement cavity 22 is welded to the top wall 11 and the inner wall 12 of the front longitudinal beam 10, and the inner wall 2131 and the bottom wall 2132 of the side reinforcement beam 21, respectively, which can better absorb and disperse the impact energy during a collision, thereby reducing damage to the vehicle. At the same time, the implementation process is simple. Compared with the same type of structure, this structure only needs to weld the front longitudinal beam 10 and the side reinforcement beam 21 to the front reinforcement cavity 22, and does not need to increase the workstation and work hours for the final assembly, so the cost is low.

[0052] The side reinforcing beam 21 includes a side reinforcing beam outer plate 211, a side reinforcing beam outer plate front section 212, and a side reinforcing beam inner plate 213. The side reinforcing beam outer plate 211 and the side reinforcing beam outer plate front section 212 are arranged along the front-to-back direction, and the side reinforcing beam inner plate 213 is arranged on the inner side of the side reinforcing beam outer plate 211 and the side reinforcing beam outer plate front section 212. The side reinforcing beam outer plate 211, the side reinforcing beam outer plate front section 212, and the side reinforcing beam inner plate 213 together form a cavity 214.

[0053] The side reinforcement beam 21 is made of high-strength steel while meeting the requirements of torsional rigidity, structural durability, NVH road noise, VD control, strength and dynamic rigidity, taking into account the requirements of vehicle lightweighting to achieve the effect of cost reduction and weight reduction. The design of the cavity 214 can significantly improve the rigidity of the overall structure, especially when subjected to external impact, which helps to resist deformation and protect the safety of the passenger compartment.

[0054] The front reinforcement cavity 22 includes an inner connecting plate 221 and a side connecting plate 222, which together form a front cavity 223. The inner connecting plate 221 is welded to the inner side wall 12 and the top wall 11 of the front longitudinal beam 10, and the inner side wall 2131 and the bottom wall 2132 of the side reinforcement beam 21. The side connecting plate 222 is welded to the top wall 11 of the front longitudinal beam 10 and the bottom wall 2132 of the side reinforcement beam 21. Multiple connection points optimize force transmission, making the load more evenly distributed in the front cabin connection structure, which helps to improve impact resistance and overall stability.

[0055] See also Figures 8 to 10 As shown, the inner connecting plate 221 includes a main plate portion 2211, two side plate portions 2212 bent from the main plate portion 2211, and a plurality of connecting pieces 2213 arranged at the edges of the main plate portion 2211 and the two side plate portions 2212. The plurality of connecting pieces 2213 are respectively welded to the inner side wall 12, the top wall 11 and the upper flange 14 of the front longitudinal beam 10, the inner side wall 2131 and the bottom wall 2132 of the side reinforcing beam 21, and the side connecting plate 222. A first mounting hole 2214 is provided on the main plate portion 2211.

[0056] The side connecting plate 222 includes a main plate portion 2221 and an upper flange 2222, a lower flange 2223, a front folding edge 2224 and a rear folding edge 2225 arranged at the edge of the main plate portion 2221. The upper flange 2222 is welded to the bottom wall 2132 of the side reinforcing beam 21. The lower flange 2223 is welded to the top wall 11 of the front longitudinal beam 10. The upper parts of the front folding edge 2224 and the rear folding edge 2225 are welded to the inner connecting plate 221. The lower parts of the front folding edge 2224 and the rear folding edge 2225 are welded to the upper flange 14 of the front longitudinal beam 10. The main plate portion 2221 is provided with a second mounting hole 2226 aligned with the first mounting hole 2214 for the fixing member to pass through.

[0057] The lower part of the front reinforcement cavity 22 is also fixed to the front longitudinal beam 10 and the energy absorption box 32 by bolts 321. The lower part of the main plate portion 2211 of the front reinforcement cavity 22 is provided with a through hole 2215, and the through hole 2215 is located below the first mounting hole 2214. The inner side wall 12 of the front longitudinal beam 10 and the rear part of the energy absorption box 32 are provided with holes aligned with the through hole 2215. The bolts 321 are assembled to the through hole 2215 and the hole to fix the front reinforcement cavity 22 to the front longitudinal beam 10 and the energy absorption box 32.

[0058] See also Figures 11 to 13 As shown, the rear reinforcement cavity 23 is arranged behind the front reinforcement cavity 22. The lower part of the rear reinforcement cavity 23 is connected to the outer side wall 13 of the front longitudinal beam 10. The upper part of the rear reinforcement cavity 23 is connected to the inner side wall 2131 and the bottom wall 2132 of the side reinforcement beam 21.

[0059] Please also see Figures 14 to 16 As shown, the rear reinforcement cavity 23 includes a front reinforcement 231, a rear connecting plate 232 and a front upper cover plate 233. The front reinforcement 231 is located at the front side of the rear connecting plate 232, and the front upper cover plate 233 is arranged on the inner side of the front reinforcement 231 and the rear connecting plate 232. The front reinforcement 231, the rear connecting plate 232 and the front upper cover plate 233 are overlapped in pairs to form a rear cavity 234. The front reinforcement 231, the rear connecting plate 232 and the front upper cover plate 233 are all welded to the outer side wall 13 of the front longitudinal beam 10 and the inner side wall 2131 or the bottom wall 2132 of the side reinforcement beam 21.

[0060] The combination of the front reinforcement 231, the rear connection plate 232 and the front upper cover plate 233 enhances the overall connection strength and rigidity. Through the overlapping design of these components, the load can be more evenly distributed inside the rear cavity 234, reducing local stress concentration, thereby improving impact resistance.

[0061] The front reinforcement 231 includes a first main board portion 2311, a second main board portion 2312, and a connecting portion 2313 connecting the first main board portion 2311 and the second main board portion 2312. An upper flange 2314 is provided at the upper edge of the first main board portion 2311, and a side flange 2315 is provided at the side edge of the second main board portion 2312. The upper flange 2314 is welded to the bottom wall 2132 of the side reinforcement beam 21, and the side flange 2315 is welded to the outer side wall 13 of the front longitudinal beam 10.

[0062] The rear connecting plate 232 includes a main plate portion 2321 and an upper flange 2322, a lower flange 2323, a front folding edge 2324 and a rear folding edge 2325 arranged at the edge of the main plate portion 2321. The upper flange 2322 is welded to the bottom wall 2132 of the side reinforcing beam 21. The lower flange 2323 is welded to the outer side wall 13 of the front longitudinal beam 10. The front folding edge 2324 is welded to the first main plate portion 2311 and the second main plate portion 2312. The rear folding edge 2325 is welded to the front upper cover plate 233.

[0063] The front upper cover plate 233 includes a main plate portion 2331 and an upper flange 2332, a lower flange 2333, a front folding edge 2334 and a rear folding edge 2335 arranged at the edge of the main plate portion 2331. The main plate portion 2331 is welded to the rear connecting plate 232, and there are three welding points between the main plate portion 2331 and the rear connecting plate 232. The upper flange 2332 is welded to the inner side wall 2131 of the side reinforcing beam 21. The lower flange 2333 is welded to the outer side wall 13 of the front longitudinal beam 10. The front folding edge 2334 is welded to the second main plate portion 2312. The rear folding edge 2335 is welded to the shock absorber seat 60.

[0064] In an embodiment of the present application, the side reinforcement beam 21, the front reinforcement cavity 22, the front longitudinal beam 10 and the rear reinforcement cavity 23 are made of high-strength steel to improve rigidity. In addition, composite materials (such as carbon fiber reinforced plastics) may be used to replace part of the steel to reduce weight and increase strength and impact resistance in other directions.

[0065] When the front anti-collision beam body 31 is subjected to a positive collision force, the positive collision force is transmitted from the energy absorption box 32 to the front longitudinal beam 10, and then to the front longitudinal beam 10 and the front reinforcement cavity 22, the rear reinforcement cavity 23 and the side reinforcement beam 21 to form a circular force transmission path. Since the front reinforcement cavity 22 and the rear reinforcement cavity 23 include multiple reinforcement members arranged along the Z direction: the inner connecting plate 221, the side connecting plate 222, the front reinforcement member 231, the rear connecting plate 232 and the front upper cover plate 233, and the rear reinforcement cavity 23 is connected to the front wheel cover 61, multi-channel force transmission can be performed in the Z direction.

[0066] The energy absorption box 32, the front longitudinal beam 10, the side reinforcement beam 21, the front reinforcement cavity 22 and the rear reinforcement cavity 23 all form cavities. The side reinforcement beam 21 can form a structure of a large ring inside a small ring, which not only meets the performance requirements but also takes into account the lightweight and cost requirements. The structure of the connection between the rings is simple and continuous, without any interruption in force transmission. The lap joints are reasonably designed and all adopt welding technology, which is simple and easy to manufacture.

[0067] The front cabin connection structure of this application takes multiple objectives into consideration. While meeting the performance requirements and layout requirements of the vehicle body torsional stiffness, NVH road noise, durability, safety, and installation point dynamic stiffness, the performance target is achieved through structural optimization without patching and strengthening. This makes the overall structure simpler and more efficient, and also achieves lightweight and reduces costs. The overall structure is strong, which can effectively prevent NVH road noise, and there are no modal and resonance problems. There are no abnormal noises and torsional stiffness problems under extreme working conditions.

[0068] The front cabin connection structure of the present application is provided with a rear reinforcement cavity 23 and a front reinforcement cavity 22 fixed to the front longitudinal beam 10 and the side reinforcement beam 21. The structure is simple and efficient, and can effectively disperse all the forces to all parts of the vehicle body structure, so that the forces are evenly distributed everywhere, and the stiffness and mode of the overall structure are improved. While meeting the performance requirements of torsional stiffness, structural durability, NVH road noise, VD control, strength and dynamic stiffness, the lightweight requirements of the whole vehicle are comprehensively considered, and the structure is optimized to achieve the effect of reducing cost and weight.

[0069] The present application also provides a vehicle, comprising the above-mentioned front cabin connection structure.

[0070] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A front cabin connection structure, characterized in that: It includes a front longitudinal beam and a front wheel cover side reinforcement beam assembly; the front wheel cover side reinforcement beam assembly includes a side reinforcement beam, a front reinforcement cavity and a rear reinforcement cavity; the side reinforcement beam is located above the front longitudinal beam and is connected to the front longitudinal beam through the front reinforcement cavity and the rear reinforcement cavity.

2. The front cabin connection structure according to claim 1, characterized in that: The front longitudinal beam, the side reinforcement beam, the front reinforcement cavity and the rear reinforcement cavity together form a frame structure.

3. The front cabin connection structure according to claim 2, characterized in that: The front reinforcement cavity is arranged at the front ends of the front longitudinal beam and the side reinforcement beam; the lower part of the front reinforcement cavity is connected to the top wall and the inner wall of the front longitudinal beam; the upper part of the front reinforcement cavity is connected to the inner wall and the bottom wall of the side reinforcement beam.

4. The front cabin connection structure according to claim 3, characterized in that: The front reinforcement cavity includes an inner connecting plate and a side connecting plate, and the inner connecting plate and the side connecting plate together form a front cavity; the inner connecting plate is connected to the inner side wall and top wall of the front longitudinal beam and the inner side wall and bottom wall of the side reinforcement beam; the side connecting plates are respectively connected to the top wall of the front longitudinal beam and the bottom wall of the side reinforcement beam.

5. The front cabin connection structure according to claim 2, characterized in that: The rear reinforcement cavity is arranged behind the front reinforcement cavity; the lower part of the rear reinforcement cavity is connected to the outer side wall of the front longitudinal beam; the upper part of the rear reinforcement cavity is connected to the inner side wall and the bottom wall of the side reinforcement beam.

6. The front cabin connection structure according to claim 5, characterized in that: The rear reinforcement cavity includes a front reinforcement member, a rear connecting plate and a front upper cover plate; the front reinforcement member, the rear connecting plate and the front upper cover plate are overlapped in pairs to form a rear cavity.

7. The front cabin connection structure according to claim 6, characterized in that: The front reinforcement is located at the front side of the rear connecting plate, and the front upper cover plate is arranged on the inner side of the front reinforcement and the rear connecting plate; the front reinforcement, the rear connecting plate and the front upper cover plate are all welded to the outer side wall of the front longitudinal beam and the inner side wall or bottom wall of the side reinforcement beam.

8. The front cabin connection structure according to claim 1, characterized in that: It also includes a front anti-collision beam assembly, which includes a front anti-collision beam body and energy absorption boxes arranged on both sides of the front anti-collision beam body; the rear part of the energy absorption box protrudes into the front longitudinal beam, and the energy absorption box and the front longitudinal beam are fixed by bolts.

9. The front cabin connection structure according to claim 8, characterized in that: The lower portion of the front reinforcement cavity is also fixed to the front longitudinal beam and the energy absorption box by means of the bolts.

10. The front cabin connection structure according to claim 1, characterized in that: It also includes an upper cross beam, which includes a main body portion perpendicular to the front longitudinal beam and connecting portions located on both sides of the main body portion and inclined relative to the main body portion; the side reinforcement beam is offset outward and rearward relative to the front longitudinal beam; and the connecting portion is connected to the front portion of the side reinforcement beam.

11. The front cabin connection structure according to claim 1, characterized in that: It also includes a shock absorber seat and a shock absorber seat connecting crossbeam, the shock absorber seat includes a front wheel cover and a shock absorber mounting plate; the rear part of the front longitudinal beam is connected to the inner side of the front wheel cover; the side reinforcement beam is connected to the outer side of the front wheel cover; the two ends of the shock absorber seat connecting crossbeam are respectively connected to the shock absorber seat; the rear reinforcement cavity is connected to the front side of the front wheel cover.

12. The front cabin connection structure according to claim 1, characterized in that: The side reinforcement beam includes a side reinforcement beam outer plate, a front section of the side reinforcement beam outer plate and a side reinforcement beam inner plate; the side reinforcement beam outer plate and the front section of the side reinforcement beam outer plate are arranged along the front-to-back direction, and the side reinforcement beam inner plate is arranged on the inner side of the side reinforcement beam outer plate and the front section of the side reinforcement beam outer plate; the side reinforcement beam outer plate, the front section of the side reinforcement beam outer plate and the side reinforcement beam inner plate together form a cavity.

13. A vehicle, characterized in that: It comprises the front cabin connection structure according to any one of claims 1 to 12.

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