A vehicle engine compartment rear section structure, a front compartment assembly and a vehicle

Abstract

The application relates to the technical field of vehicle body structure, and discloses a vehicle engine compartment rear section structure, a front compartment assembly and a vehicle. The vehicle engine compartment rear section structure comprises a front wallboard middle beam assembly, a front wallboard lower beam assembly and a beam middle reinforcing piece assembly. The longitudinal section of the front wallboard middle beam assembly is in a U shape. The lower part of the front wallboard middle beam assembly is fixedly connected with the upper part of the front wallboard lower beam assembly. The beam middle reinforcing piece assembly is fixedly connected at the middle part of the front wallboard middle beam assembly and the front wallboard lower beam assembly. The front compartment assembly comprises the vehicle engine compartment rear section structure, a front wallboard, an A column inner plate, an engine compartment boundary beam assembly, a rocker beam and a middle channel. The application can avoid the destructive damage caused by the collision force gathering in the front wallboard area, and reduce the invasion amount of the cockpit and the damage risk of the battery pack.

Description

Technical Field

[0001] This invention relates to the field of vehicle body structure technology, and in particular to a rear section structure of the engine compartment, a front compartment assembly, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicles in my country, the consumer market is paying increasing attention to vehicle safety performance. Due to the significant differences between electric vehicles and traditional fuel vehicles in terms of battery pack layout, the main load-bearing beam structure of the entire vehicle body differs considerably. In particular, the longitudinal beam structure under the passenger compartment is replaced by the battery pack, reducing the force transmission path in a collision and increasing the deformation of the front bulkhead area and passenger compartment, which can easily cause physical injury to the occupants.

[0003] For the force transmission structure in the engine compartment of traditional gasoline vehicles, the collision force from the front of the vehicle is transmitted to the engine compartment side beams, and then mainly transferred to the rear of the vehicle through the sill side beams, the front floor under-longitudinal beams, and the central channel reinforcement beam. For example, the force transmission structure of a front beam system for automobiles and the automobile disclosed in patent publication number CN115352530A involves the collision force borne by the front collision beam being transmitted through the engine compartment side beams via three paths: the sill side beams, the front floor under-longitudinal beams, and the central channel reinforcement beam. This structure is complex and severely encroaches on the battery pack placement space. Therefore, the structure in this patent document cannot meet the requirements for battery pack placement and is not suitable for existing new energy vehicles.

[0004] Regarding the force transmission structure in the engine compartment area of ​​new energy vehicles, the presence of a large battery pack structure beneath the passenger compartment prevents the placement of front floor longitudinal beams and central channel reinforcement beams. For example, patent CN216468090U discloses a front-end force transmission structure and vehicle, where the rear section of the front longitudinal beam is composed of interconnected components. This interconnected structure leads to reduced collision energy efficiency during energy transfer. Furthermore, the complex structure of the rear section of the side beam, composed of interconnected components, makes precise body control difficult, resulting in dimensional inaccuracies that fail to meet the matching requirements of the CTB battery pack's mounting and sealing surfaces. Therefore, this structure is unsuitable for CTB battery pack technology.

[0005] In addition, patent CN115092262A discloses a cast aluminum engine compartment assembly and vehicle, which describes an engine compartment body structure integrally cast from aluminum alloy. This integral die-cast structure results in higher overall vehicle costs due to material and manufacturing costs. Furthermore, because the front engine compartment is a single-piece structure, damage during a collision often necessitates complete replacement, increasing maintenance costs.

[0006] In summary, how to avoid the destructive effect of collision forces accumulating in the front bulkhead area, and how to reduce the intrusion into the passenger compartment and the risk of damage to the power battery pack are issues that new energy vehicles need to further address. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a rear section structure of a vehicle engine compartment, a front compartment assembly, and a vehicle, wherein the rear section structure of the vehicle engine compartment can avoid the destructive effect caused by the accumulation of collision forces in the front bulkhead area, and reduce the amount of intrusion into the cockpit and the risk of damage to the battery pack.

[0008] The present invention solves the above-mentioned technical problems through the following technical means:

[0009] In a first aspect, this invention discloses a rear section structure of a vehicle engine compartment, including a front bulkhead middle crossbeam assembly, a front bulkhead lower crossbeam assembly, and a crossbeam reinforcement assembly. The lower part of the front bulkhead middle crossbeam assembly is fixedly connected to the upper part of the front bulkhead lower crossbeam assembly, and the crossbeam reinforcement assembly is fixedly connected at the middle position of the front bulkhead middle crossbeam assembly and the front bulkhead lower crossbeam assembly. In this technical solution, the crossbeam reinforcement assembly not only strengthens the connection between the front bulkhead middle crossbeam assembly and the front bulkhead lower crossbeam assembly, but also forms a complete force transmission path with the external central channel, thereby avoiding the destructive effect of collision force accumulation in the front bulkhead area and reducing the intrusion into the cockpit and the risk of damage to the battery pack.

[0010] Furthermore, the front bulkhead middle beam assembly includes a front bulkhead middle beam, the longitudinal section of which is U-shaped, and the middle part of which is fixedly connected to the upper end of the middle beam reinforcing member assembly; the upper and lower ends of the front bulkhead middle beam are respectively provided with a front bulkhead upper connecting part and a front bulkhead lower connecting part; both the left and right ends of the front bulkhead middle beam are provided with external connecting parts, and both the left and right sides of the front bulkhead middle beam are provided with longitudinal beam upper connecting parts.

[0011] Furthermore, the lower crossbeam assembly of the front bulkhead includes a lower crossbeam of the front bulkhead, the longitudinal section of which is L-shaped, and the middle part of which is fixedly connected to the middle reinforcing member assembly of the crossbeam; the upper end of the lower crossbeam of the front bulkhead is provided with a lower crossbeam upper connecting part that connects to the middle crossbeam of the front bulkhead, and the lower crossbeam of the front bulkhead is also provided with a rear connecting part; both the left and right ends of the lower crossbeam of the front bulkhead are provided with sill beam connecting parts, and both the left and right sides of the lower crossbeam of the front bulkhead are provided with longitudinal beam lower connecting parts.

[0012] Furthermore, the reinforcing member assembly in the crossbeam is an M-shaped cavity structure, and the reinforcing member assembly in the crossbeam is provided with a reinforcing member connecting part that connects to the crossbeam assembly in the front bulkhead and the lower crossbeam assembly in the front bulkhead; the reinforcing member assembly in the crossbeam also has a front bulkhead connecting part, which is used to connect with the front bulkhead and the central channel.

[0013] Furthermore, both the middle crossbeam and the lower crossbeam of the front bulkhead are integral thermoformed sheet metal structures. In this design, both the middle crossbeam and the lower crossbeam of the front bulkhead are integral thermoformed structural components, integrating multiple parts in the rear section of the traditional front cabin longitudinal beam structure into a single complete part, thus avoiding incomplete force transmission caused by multiple parts.

[0014] Furthermore, the lines connecting the upper and outer connecting parts of the longitudinal beams and the upper section of the crossbeam reinforcement assembly form a triangular distribution, while the lines connecting the lower connecting parts of the longitudinal beams, the sill beam connecting parts, and the crossbeam reinforcement assembly form a right-angled trapezoidal distribution. This ensures that the collision force transmitted by the cabin side beam assembly is evenly distributed across the front bulkhead crossbeam assembly and the lower front bulkhead crossbeam assembly, and is relatively evenly transmitted to the A-pillar inner panel, sill beam, and central tunnel, guaranteeing effective collision energy transfer.

[0015] Furthermore, the lower front bulkhead beam assembly also includes a front subframe rear mounting point reinforcement plate, a front bulkhead support bracket, and battery pack mounting nuts disposed on the lower front bulkhead beam. In this technical solution, the front subframe rear mounting point reinforcement plates can be symmetrically disposed on the lower front bulkhead beam assembly, the front bulkhead support brackets are evenly distributed from left to right on the lower front bulkhead beam assembly, and the battery pack mounting nuts are evenly distributed from left to right on the lower front bulkhead beam assembly, thereby enabling the lower front bulkhead beam to be fixedly installed with the front subframe and the power battery pack.

[0016] Furthermore, the lower crossbeam of the front bulkhead is provided with multiple battery pack mounting holes and multiple front subframe rear mounting holes. The portion of the lower crossbeam of the front bulkhead located at the battery pack mounting holes serves as the battery pack sealing surface, and a battery pack sealing strip is provided on the battery pack sealing surface. A front subframe rear mounting point reinforcement plate is provided on the lower crossbeam of the front bulkhead located at the multiple front subframe rear mounting holes. Since the front subframe rear mounting points and the battery pack front mounting points are arranged on the same component, during installation, it is only necessary to ensure that the gap between the front subframe assembly and the battery pack meets the requirements, thereby increasing the arrangement space of the battery pack assembly and improving the vehicle's driving range.

[0017] Furthermore, the crossbeam assembly in the front bulkhead also includes a steering column mounting plate, which is fixedly mounted on the crossbeam in the front bulkhead.

[0018] Secondly, this invention also discloses a front cabin assembly, including the aforementioned rear section structure of the vehicle engine compartment, as well as a front bulkhead, an inner A-pillar panel, an engine compartment side beam assembly, a sill beam, and a central passageway; the front bulkhead is located above the reinforcing member assembly in the crossbeam; the front bulkhead is fixedly connected to the upper connecting portion and the lower connecting portion of the front bulkhead, the inner A-pillar panel is fixedly connected to the outer connecting portion, the engine compartment side beam assembly is fixedly connected to the upper connecting portion of the longitudinal beam, the sill beam is fixedly connected to the sill beam connecting portion, and the front bulkhead and central passageway are fixedly connected to the front bulkhead connecting portion. This arrangement, compared to the traditional central passageway structure, greatly reduces the encroachment of the central passageway on the passenger compartment space in the X and Z directions, providing spatial feasibility for the arrangement of a centrally located air conditioner or a floating instrument panel.

[0019] Furthermore, the nacelle side beam assembly includes an outer panel of the engine nacelle side beam, an inner panel of the engine nacelle side beam, and a rear section of the engine nacelle side beam connected in sequence, and the rear section of the engine nacelle side beam is fixedly connected to the middle crossbeam of the front bulkhead and the lower crossbeam of the front bulkhead.

[0020] Thirdly, the present invention also discloses a vehicle, the vehicle comprising a vehicle body and the aforementioned rear section structure of the vehicle engine compartment or front compartment assembly.

[0021] The present invention provides a rear section structure of a vehicle engine compartment, a front compartment assembly, and a vehicle, which have the following advantages:

[0022] 1. In this invention, the front bulkhead middle crossbeam assembly, the front bulkhead lower crossbeam assembly, and the middle crossbeam reinforcement assembly are interconnected, connecting the entire rear section of the engine compartment structure with the left and right A-pillar inner panels, sill beams, and central tunnel to form a transversely continuous protective barrier structure with two horizontal and three vertical axes. This design makes the connection structure of the rear section of the automotive engine compartment longitudinal beams more complete, the manufacturing process simpler, and the force transmission performance superior. The integrated front bulkhead middle crossbeam assembly and the front bulkhead lower crossbeam assembly, while ensuring sufficient strength, can effectively transfer force to the A-pillar inner panels, sill beams, and central tunnel, thereby ensuring the stability of the vehicle body structure and reducing the intrusion of the front bulkhead into the passenger compartment during a collision.

[0023] 2. In the vehicle front compartment assembly of the present invention, when a frontal collision or offset collision occurs, the collision energy after deformation of the energy-absorbing box and other components is transferred from the front to the rear section along the side beam assembly of the engine compartment. The residual collision energy continues to be transferred through the rear section structure of the engine compartment of the present invention. The rear section structure of the engine compartment, composed of the front bulkhead crossbeam assembly, the lower front bulkhead crossbeam assembly, and the crossbeam reinforcement assembly connected between the side beam assembly, the A-pillar inner panel, the sill beam, and the center tunnel, makes the transfer of collision energy in the rear section of the engine compartment more stable and balanced, reducing the intrusion into the passenger compartment. When applied to new energy vehicles with power battery packs, the above-mentioned force transfer method can also effectively reduce the risk of battery pack damage in the event of a collision.

[0024] 3. The crossbeam in the front bulkhead and the lower crossbeam of the front bulkhead are both integral thermoformed sheet metal structures. Compared with the traditional structure that uses multiple parts to connect with each other, the present invention can reduce the number of connection welding points of multiple parts, achieve higher integration, reduce manufacturing molds, and save development costs.

[0025] 4. When applied to new energy vehicles with CTB power battery packs, the present invention improves the dimensional accuracy of the battery pack mounting points and sealing surfaces by arranging the CTB battery pack mounting holes, CTB battery pack sealing surfaces, and front subframe rear mounting holes on the same part. Furthermore, during vehicle assembly, it is only necessary to ensure that the gap between the front subframe assembly and the battery pack meets the requirements, thereby increasing the arrangement space of the battery pack assembly and improving the vehicle's driving range. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the rear section of the vehicle engine compartment in Example 1;

[0027] Figure 2 yes Figure 1 The top view of the exploded diagram;

[0028] Figure 3 This is a partial schematic diagram of the front compartment assembly of Embodiment 2;

[0029] Figure 4 This is a bottom view of the front cabin assembly of Embodiment 2;

[0030] Figure 5 yes Figure 4 A cross-sectional view along the "AA" direction;

[0031] Figure 6 This is an exploded view of the front compartment assembly of Example 2;

[0032] Figure 7 This is a schematic diagram of the collision force transmission path of the front compartment assembly in Example 2.

[0033] In the diagram, each number represents:

[0034] Front bulkhead middle crossbeam assembly 1, front bulkhead middle crossbeam 11, upper connecting part 111, lower connecting part 112, outer connecting part 113, upper connecting part 114 of longitudinal beam, steering column mounting plate 12.

[0035] 2. Lower crossbeam assembly of front bulkhead; 21. Lower crossbeam of front bulkhead; 211. Upper connecting part of lower crossbeam; 212. Rear connecting part; 213. Sill beam connecting part; 214. Lower connecting part of longitudinal beam; 215. Battery pack mounting hole; 216. Battery pack sealing surface; 217. Rear mounting hole of front subframe; 22. Rear mounting point reinforcement plate of front subframe; 23. Front bulkhead support bracket; 24. Battery pack mounting nut.

[0036] 3. Reinforcing component assembly in the crossbeam; 31. Reinforcing component connecting part; 32. Front bulkhead connecting part.

[0037] 4. Front bulkhead panel; 5. Inner A-pillar panel; 6. Engine compartment side beam assembly; 61. Outer engine compartment side beam panel; 62. Inner engine compartment side beam panel; 63. Rear section of engine compartment side beam; 7. Sill beam; 8. Central passage; 9. Power battery pack; 91. Battery pack sealing strip. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0039] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product size; it is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0040] In the figures of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this invention and simplifying the description, and do 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. Therefore, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] Example 1

[0042] This embodiment describes a rear section structure of a vehicle engine compartment, such as... Figures 1-2 As shown, it includes a front bulkhead middle crossbeam assembly 1, a front bulkhead lower crossbeam assembly 2, and a crossbeam middle reinforcement assembly 3; the longitudinal section of the front bulkhead middle crossbeam assembly 1 is U-shaped, the lower part of the front bulkhead middle crossbeam assembly 1 is welded and fixed to the upper part of the front bulkhead lower crossbeam assembly 2, and the crossbeam middle reinforcement assembly 3 is welded and fixed at the middle position of the front bulkhead middle crossbeam assembly 1 and the front bulkhead lower crossbeam assembly 2.

[0043] Specifically, the front bulkhead middle beam assembly 1 includes a front bulkhead middle beam 11 and a steering column mounting plate 12. The steering column mounting plate 12 is fixedly installed on the front bulkhead middle beam 11. The middle part of the front bulkhead middle beam 11 is welded and fixed to the upper end of the middle beam reinforcing assembly 3. The upper end and lower end of the front bulkhead middle beam 11 are respectively provided with a front bulkhead upper connecting part 111 and a front bulkhead lower connecting part 112. Specifically, the front bulkhead upper connecting part 111 and the front bulkhead lower connecting part 112 can be welded edges or bolted fixing edges. Both the left and right ends of the front bulkhead middle beam 11 are provided with external connecting parts 113, and both the left and right sides of the front bulkhead middle beam 11 are provided with longitudinal beam upper connecting parts 114.

[0044] The lower crossbeam assembly 2 of the front bulkhead includes a lower crossbeam 21, the longitudinal section of which is L-shaped. The middle part of the lower crossbeam 21 is welded and fixed to the middle reinforcing member assembly 3 of the crossbeam. The upper end of the lower crossbeam 21 is provided with a lower crossbeam upper connecting part 211 that connects to the middle crossbeam 11 of the front bulkhead. The lower crossbeam 21 is also provided with a rear connecting part 212. In this embodiment, the lower crossbeam upper connecting part 211 and the rear connecting part 212 can be welded edges or bolted edges. Both ends of the lower crossbeam 21 are provided with sill beam connecting parts 213, and both sides of the lower crossbeam 21 are provided with longitudinal beam lower connecting parts 214. The crossbeam reinforcement assembly 3 has an M-shaped cavity structure. The crossbeam reinforcement assembly 3 is provided with a reinforcement connection part 31 that connects to the front bulkhead middle crossbeam assembly 1 and the front bulkhead lower crossbeam assembly 2. The reinforcement connection part 31 can be a welded edge or a bolted fixing edge. The crossbeam reinforcement assembly 3 also has a front bulkhead connection part 32, which is used to connect to the front bulkhead 4 and the central channel 8. To increase the integrity of force transmission, in this embodiment, both the front bulkhead middle crossbeam 11 and the front bulkhead lower crossbeam 21 are integral thermoformed sheet metal structures.

[0045] In this embodiment, in order to ensure that the collision force transmitted by the cabin side beam assembly 6 can be evenly distributed on the front bulkhead middle beam assembly 1 and the front bulkhead lower beam assembly 2, and relatively evenly transmitted to the A-pillar inner panel 5, sill beam 7 and central passage 8, so as to ensure the effective transmission of collision energy, the connecting lines between the upper connecting part 114 of the longitudinal beam, the outer connecting part 113 and the upper section of the middle reinforcement assembly 3 of the crossbeam are triangularly distributed, and the connecting lines between the lower connecting part 214 of the longitudinal beam, the sill beam connecting part 213 and the middle reinforcement assembly 3 of the crossbeam are right-angled trapezoidally distributed.

[0046] To enable the lower front bulkhead beam 21 to be fixedly installed with the external front subframe and power battery pack 9, the lower front bulkhead beam assembly 2 also includes a front subframe rear mounting point reinforcement plate 22, a front bulkhead support bracket 23, and a battery pack mounting nut 24 disposed on the lower front bulkhead beam 21. In this embodiment, the two front subframe rear mounting point reinforcement plates 22 are symmetrically arranged on the lower front bulkhead beam assembly 2, the four front bulkhead support brackets 23 are evenly arranged from left to right on the lower front bulkhead beam assembly 2, and the battery pack mounting nuts 24 are evenly arranged from left to right on the lower front bulkhead beam assembly 2.

[0047] like Figure 4 and Figure 5 As shown, the lower crossbeam 21 of the front bulkhead is provided with six battery pack mounting holes 215 and two front subframe rear mounting holes 217. In order to arrange the mounting point and sealing surface of the front end of the battery pack on the same part, the dimensional accuracy of the mounting point and sealing surface is improved while reducing the number of parts. A transverse through rib is provided on the lower crossbeam 21 of the front bulkhead located at the battery pack mounting hole 215, which is the battery pack sealing surface 216. A battery pack sealing strip 91 is provided on the battery pack sealing surface 216. A front subframe rear mounting point reinforcement plate 22 is provided on the lower crossbeam 21 of the front bulkhead located at the front subframe rear mounting hole 217.

[0048] Example 2

[0049] This embodiment is a front cabin assembly, such as Figures 1-6 As shown, the vehicle includes the rear section structure of the engine compartment as described in Embodiment 1 above, as well as a front bulkhead 4, an inner A-pillar panel 5, an engine compartment side beam assembly 6, a sill beam 7, and a central passage 8. The front bulkhead 4 is located above the reinforcing member assembly 3 in the crossbeam. The front bulkhead 4 is welded and fixed to the upper connecting part 111 and the lower connecting part 112 of the front bulkhead. The inner A-pillar panel 5 is welded and fixed to the outer connecting part 113. The engine compartment side beam assembly 6 is welded and fixed to the upper connecting part 114 of the longitudinal beam. The sill beam 7 is welded and fixed to the sill beam connecting part 213. The front bulkhead 4 and the central passage 8 are welded and fixed to the front bulkhead connecting part 32. The engine compartment side beam assembly 6 includes an outer engine compartment side beam panel 61, an inner engine compartment side beam panel 62, and a rear section 63 of the engine compartment side beam connected in sequence. The rear section 63 of the engine compartment side beam is welded and fixed to the middle crossbeam 11 and the lower crossbeam 21 of the front bulkhead.

[0050] Through the above configuration, the front bulkhead middle crossbeam assembly 1, the front bulkhead lower crossbeam assembly 2, and the middle crossbeam reinforcement assembly 3 are interconnected, connecting the entire rear section of the engine compartment structure with the left and right A-pillar inner panels 5, sill beams 7, and central passage 8 to form a transversely continuous protective barrier structure with two horizontal and three vertical axes. This configuration makes the connection structure of the rear section of the longitudinal beams in the engine compartment more complete, the manufacturing process simpler, and the force transmission performance superior. The integrated front bulkhead middle crossbeam assembly 1 and the front bulkhead lower crossbeam assembly 2, while ensuring sufficient strength, can effectively transfer force to the A-pillar inner panels 5, sill beams 7, and central passage 8, thereby ensuring the stability of the vehicle body structure and reducing the intrusion of the front bulkhead into the passenger compartment during a collision.

[0051] In the event of a head-on collision or offset collision, the impact energy from the deformed energy-absorbing box is transferred along the cabin side beam assembly 6 from its front section to its rear section, and the remaining impact energy continues to be transferred through the rear section structure of the cabin according to the present invention. Figure 7 As shown, the cavity structure formed by the outer plate 61 of the engine compartment side beam and the front section of the engine compartment side beam bears the collision force transmitted from the front of the vehicle body. When the force is transmitted to the rear end of the engine compartment side beam, there are three transmission paths. The first path ( Figure 7 The force transmission path I is transmitted through the crossbeam 11 in the front bulkhead to the inner panel 5 of the A-pillar. The second path ( Figure 7 The force transmission path II) is transmitted to the sill beam 7 via the lower crossbeam 21 of the front bulkhead at the rear of the cabin side beam. The third path ( Figure 7 The force transmission path III is achieved through the transverse beam 11 and lower transverse beam 21 of the front bulkhead, which then transmits the force laterally to the floor and central passage 8 via the reinforcing assembly 3 in the transverse beam. The first force transmission path includes the engine compartment side beam, the transverse beam 11 of the front bulkhead, and the inner A-pillar panel 5. The rear ends of the outer panel 61 and inner panel 62 of the engine compartment side beam are connected to the cavity of the transverse beam 11 of the front bulkhead. The outer side of the transverse beam 11 bends backward to connect with the inner A-pillar panel 5, bearing the impact force transmitted from the outer upper passage. The second force transmission path includes the engine compartment side beam, the lower transverse beam 21 of the front bulkhead, and the sill beam 7. The rear section 63 of the engine compartment side beam and its reinforcing members are connected to the cavity of the lower transverse beam 21 of the front bulkhead. The outer side of the lower transverse beam 21 bends backward to connect with the sill beam 7, bearing the impact force transmitted from the outer lower passage. The third force transmission path includes the engine compartment side beam, the front bulkhead middle crossbeam 11, the front bulkhead lower crossbeam 21, the crossbeam middle reinforcement assembly 3, the front bulkhead 4, and the central channel 8. The front bulkhead middle crossbeam 11 and the front bulkhead lower crossbeam 21 are connected vertically, and the middle part of the two crossbeams is connected to the crossbeam middle reinforcement assembly 3. The front bulkhead middle crossbeam 11 and the front bulkhead lower crossbeam 21 are welded to the front bulkhead 4 to form two closed cavity structures, wherein the crossbeam middle reinforcement assembly 3 is connected to the central channel 8.

[0052] The rear section of the engine compartment, consisting of the front bulkhead crossbeam assembly 1, the lower front bulkhead crossbeam assembly 2, and the crossbeam reinforcement assembly 3, connected between the engine compartment side beam assembly 6, the A-pillar inner panel 5, the sill beam 7, and the central passage 8, ensures a more stable and balanced transmission of collision energy during the rear section of the engine compartment, reducing intrusion into the passenger compartment. When applied to new energy vehicles with power battery packs, this force transmission method can also effectively reduce the risk of battery pack damage in the event of a collision.

[0053] When this invention is applied to new energy vehicles with CTB power battery packs, the CTB battery pack mounting hole 215, battery pack sealing surface 216, and front subframe rear mounting hole 217 are arranged on the same part, thereby improving the dimensional accuracy of the battery pack mounting point and sealing surface. Furthermore, during vehicle assembly, it is only necessary to ensure that the gap between the front subframe assembly and the battery pack meets the requirements, thereby increasing the arrangement space of the battery pack assembly and improving the vehicle's driving range.

[0054] Example 3

[0055] This embodiment is a vehicle, which includes a vehicle body and the rear section structure of the vehicle engine compartment of Embodiment 1 above.

[0056] Example 4

[0057] This embodiment is a vehicle, which includes a vehicle body and the front compartment assembly of the above embodiment 2.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A vehicle engine bay rear section structure characterized by comprising: The front wallboard middle crossbeam assembly, the front wallboard lower crossbeam assembly and the crossbeam middle reinforcing member assembly are included; the lower part of the front wallboard middle crossbeam assembly is fixedly connected with the upper part of the front wallboard lower crossbeam assembly, and the crossbeam middle reinforcing member assembly is fixedly connected at the middle part of the front wallboard middle crossbeam assembly and the front wallboard lower crossbeam assembly; the front wallboard middle crossbeam assembly includes the front wallboard middle crossbeam, the left and right ends of the front wallboard middle crossbeam are provided with outer connecting parts, and the left and right sides of the front wallboard middle crossbeam are provided with longitudinal beam upper connecting parts; the front wallboard lower crossbeam assembly includes the front wallboard lower crossbeam, the left and right ends of the front wallboard lower crossbeam are provided with rocker beam connecting parts, and the left and right sides of the front wallboard lower crossbeam are provided with longitudinal beam lower connecting parts; the connecting lines among the longitudinal beam upper connecting parts, the outer connecting parts and the upper section of the crossbeam middle reinforcing member assembly are in triangular distribution, and the connecting lines among the longitudinal beam lower connecting parts, the rocker beam connecting parts and the crossbeam middle reinforcing member assembly are in right-angled trapezoidal distribution.

2. The vehicle engine bay rear section structure according to claim 1, characterized by: The longitudinal section of the front wallboard middle crossbeam is in U shape, the middle part of the front wallboard middle crossbeam is fixedly connected with the upper end of the crossbeam middle reinforcing member assembly; the upper end and the lower end of the front wallboard middle crossbeam are respectively provided with a front wallboard upper connecting part and a front wallboard lower connecting part.

3. A vehicle engine bay rear section structure according to claim 2, characterised in that: The longitudinal section of the front wallboard lower crossbeam is in L shape, the middle part of the front wallboard lower crossbeam is fixedly connected with the crossbeam middle reinforcing member assembly; the upper end of the front wallboard lower crossbeam is provided with a lower crossbeam upper connecting part connected with the front wallboard middle crossbeam, and the front wallboard lower crossbeam is further provided with a rear connecting part.

4. A vehicle engine bay rear section structure according to claim 3, characterized in that: The crossbeam middle reinforcing member assembly is in M-shaped cavity structure, the crossbeam middle reinforcing member assembly is provided with a reinforcing member connecting part connected with the front wallboard middle crossbeam assembly and the front wallboard lower crossbeam assembly; the crossbeam middle reinforcing member assembly is also provided with a front wallboard connecting part, and the front wallboard connecting part is used for being connected with the front wallboard and the middle channel.

5. The vehicle engine bay rear section structure according to claim 2, characterized by: The front wallboard middle crossbeam and the front wallboard lower crossbeam are both in one-piece hot forming sheet metal structure.

6. The vehicle engine bay rear section structure according to claim 3, characterized by: The front wallboard lower crossbeam assembly further includes a front subframe rear mounting point reinforcing plate, a front wallboard support bracket and a battery pack mounting nut provided on the front wallboard lower crossbeam.

7. The vehicle engine bay rear section structure according to claim 3, characterized by: The front wallboard lower crossbeam is provided with a plurality of battery pack mounting holes and a plurality of front subframe rear mounting holes, the part of the front wallboard lower crossbeam located at the battery pack mounting holes is a battery pack sealing surface, the battery pack sealing surface is provided with a battery pack sealing rubber strip, and the front wallboard lower crossbeam located at the plurality of front subframe rear mounting holes is provided with a front subframe rear mounting point reinforcing plate.

8. The vehicle engine bay rear section structure according to claim 2, characterized by: The front wallboard middle crossbeam assembly further includes a steering column mounting plate fixedly mounted on the front wallboard middle crossbeam.

9. A front bay assembly characterized by: The front cabin assembly includes the vehicle cabin rear section structure of claim 4, and a front wallboard, an A-pillar inner panel, a cabin side beam assembly, a rocker beam and a middle channel; the front wallboard is located above the crossbeam middle reinforcing member assembly; the front wallboard is fixedly connected with the front wallboard upper connecting part and the front wallboard lower connecting part, the A-pillar inner panel is fixedly connected with the outer connecting part, the cabin side beam assembly is fixedly connected with the longitudinal beam upper connecting part, the rocker beam is fixedly connected with the rocker beam connecting part, and the front wallboard and the middle channel are fixedly connected with the front wallboard connecting part.

10. A front compartment assembly according to claim 9, characterized in that: The cabin side beam assembly comprises an engine cabin side beam outer plate, an engine cabin side beam inner plate and an engine cabin side beam rear section connected in sequence, and the engine cabin side beam rear section is fixedly connected with the front bulkhead middle cross beam and the front bulkhead lower cross beam.

11. A vehicle characterized by: The vehicle comprises a vehicle body and the vehicle cabin rear section structure of claim 1 or the front cabin assembly of claim 9.

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