Casting forming cabin piece, vehicle front anti-collision energy absorption structure and vehicle

Abstract

The present application relates to vehicle body parts, in particular to a cast forming engine bay part, a vehicle front anti-collision energy absorption structure and a vehicle, the cast forming engine bay part comprising an engine bay part body integrally cast formed by an aluminum alloy, the engine bay part body comprising a base plate vertically arranged and serving as a lower plate part of a front wall plate assembly, left and right portions of the front side of the base plate being provided with horizontal sections extending forward as rear sections of engine bay longitudinal beams. The vehicle front anti-collision energy absorption structure comprises a front anti-collision beam assembly, an engine bay longitudinal beam assembly, a front subframe assembly, a battery pack assembly and the cast forming engine bay part; the front subframe assembly is connected between the front portions of the front sections of the two engine bay longitudinal beams in the front portion, and the rear portion of the front subframe assembly is connected between the left and right horizontal sections of the engine bay part body; a first support is connected between the rear side of the base plate and the front side of the front subframe assembly, and a front cross beam of a battery pack box body of the battery pack assembly is connected with the rear side of the base plate. It can achieve the effect of lightweight under the premise of improving strength, rigidity and collision safety.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle body part, in particular to a cast forming engine compartment part, a vehicle front anti-collision energy absorption structure and a vehicle. BACKGROUND

[0002] As disclosed in CN109353412A, a front collision energy absorption device and a vehicle body assembly having the same, and CN212556497U, a connection structure of a front longitudinal beam and a front longitudinal beam sealing plate, the longitudinal beam and the front subframe structure are relatively traditional, the energy that the vehicle body longitudinal beam can resist is limited, and the collision safety demand of the existing new energy vehicle model cannot be met; at present, new energy vehicles are very popular, and the most concerned by consumers are collision safety performance and endurance mileage, but in order to increase endurance, it is necessary to carry out light weight, and in order to collision safety, it is necessary to increase weight, and the contradiction between endurance mileage and collision safety exists in the whole vehicle development process of each vehicle body. The traditional idea is to increase the battery energy, but the cost is very expensive. SUMMARY

[0003] The purpose of the present application is to provide a cast forming engine compartment part, a vehicle front anti-collision energy absorption structure and a vehicle, which can achieve the effect of light weight under the premise of improving the strength, rigidity and collision safety.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, the present application provides a cast forming engine compartment part, comprising an engine compartment part body integrally cast formed by aluminum alloy, the engine compartment part body comprising a vertical base plate, the base plate serving as a lower plate of a front wall plate assembly; the left and right parts of the front side of the base plate are provided with horizontal sections extending forward, and the horizontal sections serve as rear sections of engine compartment longitudinal beams.

[0006] Further, the upper front side of the engine compartment part body is connected with a shock tower, the upper rear side of the engine compartment part body is connected with an A-pillar assembly, and the lower part of the engine compartment part body is connected with a rocker side beam; the rear side of the base plate is connected with a battery pack box front cross beam.

[0007] In a second aspect, the application provides a vehicle front anti-collision energy absorption structure, comprising a front anti-collision beam assembly, a cabin longitudinal beam assembly, a front subframe assembly, a battery pack assembly and the cast cabin part as described above; the cabin longitudinal beam assembly comprises cabin longitudinal beam front segments arranged on the left and right sides respectively, the front anti-collision beam assembly is connected between the front ends of the two cabin longitudinal beam front segments, and the front ends of the left and right horizontal segments of the cabin part body are connected with the rear ends of the cabin longitudinal beam front segments on the corresponding sides respectively; the front part of the front subframe assembly is connected between the front parts of the two cabin longitudinal beam front segments, and the rear part of the front subframe assembly is connected between the left and right horizontal segments of the cabin part body; a plurality of first supports are connected between the rear side of the front subframe assembly and the front side of the base plate of the cabin part body, and the front cross beam of the battery pack box of the battery pack assembly is connected with the rear side of the base plate.

[0008] Further, the front cross beam fixed to the cabin longitudinal beam assembly and the rear cross beam fixed to the left and right horizontal segments of the cabin part body are further included, the left and right ends of the front cross beam are fixedly connected with the rear parts of the two cabin longitudinal beam front segments through second supports, and the left and right ends of the rear cross beam are fixedly connected with the front parts of the horizontal segments of the cabin part body through third supports.

[0009] Further, the materials of the cabin longitudinal beam front segments, the front subframe assembly, the front cross beam and the rear cross beam are all aluminum alloy.

[0010] Further, the front anti-collision beam assembly comprises a front anti-collision beam and an energy absorption box connected between the rear side of the front anti-collision beam and the front end of the cabin longitudinal beam front segment.

[0011] Further, the front subframe assembly comprises first beams arranged on the left and right sides respectively, a second beam connected between the front parts of the two first beams, a third beam connected between the middle parts of the two first beams, and a fourth beam connected between the rear parts of the two first beams.

[0012] The number of the first supports is two, and the two first supports are arranged between the rear side of the fourth beam and the front side of the base plate in the left-right direction.

[0013] Further, the battery pack box front cross beam is provided with a through hole vertically penetrating the upper and lower side walls of the battery pack box front cross beam, the lower end of the first support is provided with a rearwardly extending support lug, and a first mounting bolt is connected with the base plate by penetrating the support lug, the through hole and the base plate from bottom to top.

[0014] Further, the front end of the first support and the rear side of the front subframe assembly are connected by a second mounting bolt.

[0015] In a third aspect, the application provides a vehicle comprising the cast cabin part as described above or the vehicle front anti-collision energy absorption structure as described above.

[0016] The application has the following beneficial effects:

[0017] 1. The engine compartment body of the present application is integrally cast from aluminum alloy. Compared with the steel engine compartment, the overall weight is reduced under the premise of ensuring the structural strength to meet the performance requirements, meeting the lightweight demand of the vehicle body. At the same time, the lower plate part of the front wall plate assembly and the middle and rear sections of the longitudinal beam assembly of the engine compartment body are combined into one, that is, the vertical base plate replaces the traditional lower plate part of the front wall plate assembly, which simplifies the vehicle body structure while improving the rigidity of the body-in-white, and maximizes the protection of the passenger compartment and the battery pack. The horizontal section extending forward on the left and right sides of the base plate serves as the rear section of the engine compartment longitudinal beam, thereby achieving the effect of reducing the traditional longitudinal beam assembly while greatly improving the strength.

[0018] 2. The vehicle front anti-collision energy absorption structure of the present application comprises a front anti-collision beam assembly, an engine compartment longitudinal beam assembly, a front subframe assembly, a battery pack assembly and the cast engine compartment part; the front part of the front subframe assembly is connected between the front parts of the two front sections of the engine compartment longitudinal beam, and the rear part of the front subframe assembly is connected between the left and right horizontal sections of the engine compartment body; a plurality of first supports are connected between the rear side of the front subframe assembly and the front side of the base plate of the engine compartment body, and the battery pack box front cross beam of the battery pack assembly is connected with the rear side of the base plate, finally forming a transmission path; from the front anti-collision beam assembly to the front subframe assembly, then to the battery pack box front cross beam through the first support, the collision energy is shared by the front subframe assembly and the battery pack assembly, and the energy absorption effect of the front part of the vehicle body is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the cast engine compartment part of the present application;

[0020] Figure 2 is one of the connection schematic diagrams of the cast engine compartment part of the present application and the shock tower;

[0021] Figure 3 is the second connection schematic diagram of the cast engine compartment part of the present application and the shock tower;

[0022] Figure 4 is the connection schematic diagram of the cast engine compartment part of the present application and the A-pillar assembly and the rocker side beam;

[0023] Figure 5 is the connection cross-sectional schematic diagram of the cast engine compartment part of the present application and the rocker side beam;

[0024] Figure 6 is the connection schematic diagram of the cast engine compartment part of the present application and the engine compartment longitudinal beam assembly and the front subframe assembly;

[0025] Figure 7 is a schematic diagram of the vehicle front anti-collision energy absorption structure of the present application;

[0026] Figure 8 is a schematic view of the cross section of the energy absorption box according to the present application;

[0027] Figure 9 is a schematic view of the connection of the first bracket according to the present application;

[0028] Figure 10 is a schematic view of the cross section of the connection of the first bracket according to the present application.

[0029] In the figure, 1 - nacelle body, 11 - base plate, 12 - horizontal section, 13 - first mounting point, 14 - second mounting point, 15 - third mounting point,

[0030] 2 - front anti-collision beam assembly, 21 - front anti-collision beam, 22 - energy absorption box, 23 - first mounting plate,

[0031] 3 - nacelle longitudinal beam assembly, 31 - nacelle longitudinal beam front section, 32 - second mounting plate,

[0032] 4 - front subframe assembly, 41 - first beam, 42 - second beam, 43 - third beam, 44 - fourth beam,

[0033] 5 - battery pack assembly, 51 - battery pack box front cross beam,

[0034] 6 - first bracket, 61 - first mounting bolt, 62 - second mounting bolt, 63 - lug, 7 - second bracket, 8 - third bracket, 9 - front cross beam, 10 - rear cross beam,

[0035] 100 - shock tower, 200 - A-pillar assembly, 300 - rocker side beam. DETAILED DESCRIPTION

[0036] Other advantages and effects of the present application can be easily understood by those skilled in the art from the above description of the preferred embodiments. The present application can also be implemented or applied in other different specific embodiments, and the details in the description can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0037] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the components related to the present application are shown in the drawings, but not drawn according to the number, shape and size of the components in actual implementation. The type, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout type of the components can also be more complex.

[0038] Embodiment one, see Figure 1The illustrated cast forming engine compartment part includes an engine compartment part body 1 integrally cast formed by aluminum alloy, the engine compartment part body 1 includes a vertically arranged base plate 11, taking the base plate 11 as the lower plate of the front wall plate assembly; the left and right parts of the front side of the base plate are provided with a forwardly extending horizontal section 12, taking the horizontal section 12 as the rear section of the engine compartment longitudinal beam. The engine compartment part body 1 is integrally cast formed by aluminum alloy, compared with the steel engine compartment part, under the premise of ensuring that the structural strength meets the performance requirements, the overall weight is reduced, meeting the lightweight demand of the vehicle body. At the same time, the engine compartment part body 1 combines the lower plate of the front wall plate assembly and the middle and rear sections of the longitudinal beam assembly, that is, taking the vertically arranged base plate 11 instead of the lower plate of the traditional front wall plate assembly, simplifying the vehicle body structure while improving the rigidity of the body in white, and maximizing the protection effect on the passenger compartment and the battery pack. The horizontal section 12 extending forwardly at the left and right parts of the front side of the base plate 11 is used as the rear section of the engine compartment longitudinal beam, thereby realizing the effect of shortening the traditional longitudinal beam assembly while greatly improving the strength.

[0039] In the embodiment, referring to Figure 1 and Figure 3 , the upper front side of the engine compartment part body 1 is connected with the shock tower 100, specifically, the first mounting point 13 connected with the rear part of the lower end of the shock tower 100 is arranged at the upper front side of the engine compartment part body 1, and the front part of the lower end of the shock tower 100 is connected with the rear part of the engine compartment longitudinal beam assembly 3. Referring to Figure 1 、 Figure 4 and Figure 5 , the upper rear side of the engine compartment part body 1 is connected with the A-pillar assembly 200, and the lower part of the engine compartment part body 1 is connected with the rocker side beam 300, specifically, the second mounting point 14 connected with the A-pillar assembly 200 is arranged at the upper part of the left and right end parts of the engine compartment part body 1, and the third mounting point 15 connected with the rocker side beam 300 is arranged at the lower part of the left and right end parts of the engine compartment part body 1. The rear side of the base plate 11 is connected with the battery pack box front cross beam 51. By connecting the engine compartment part body 1 with multiple adjacent components, when the vehicle collides, energy can be transmitted to the adjacent components, improving the energy absorption effect.

[0040] In the embodiment, referring to Figure 1 、 Figure 6 to Figure 10, the vehicle front anti-collision energy absorption structure shown, including front anti-collision beam assembly 2, cabin longitudinal beam assembly 3, front subframe assembly 4, battery pack assembly 5 and the cast forming cabin piece of the application. The cabin longitudinal beam assembly 3 includes the cabin longitudinal beam front segment 31 arranged on the left and right sides, the front anti-collision beam assembly 4 is connected between the front ends of the two cabin longitudinal beam front segments 31, and the left and right horizontal segments 12 of the cabin piece body 1 are connected with the rear ends of the corresponding side cabin longitudinal beam front segments 31 respectively; the front part of the front subframe assembly 4 is connected between the front parts of the two cabin longitudinal beam front segments 31, and the rear part of the front subframe assembly 4 is connected between the left and right horizontal segments 12 of the cabin piece body 1; the rear side of the front subframe assembly 4 and the front side of the base plate 11 of the cabin piece body 1 are connected by two first supports 6, and the battery pack box front cross beam 51 of the battery pack assembly 5 is connected with the rear side of the base plate 11. The two first supports 6 are arranged between the rear side of the front subframe assembly 4 and the front side of the base plate 11 in the left-right direction. Through the above arrangement, the transmission path is finally formed; from the front anti-collision beam assembly 2 to the front subframe assembly 4, and then transmitted to the battery pack box front cross beam 51 through the first support 6, part of the collision energy is shared by the front subframe assembly 4 and the battery pack assembly 5, and the energy absorption effect of the front part of the vehicle body is improved.

[0041] In this embodiment, since the left and right parts of the front side of the base plate 11 of the cabin piece body 1 extend forward as the horizontal segments 12 of the cabin longitudinal beam rear segment, that is, the cabin piece body 1 formed by integral casting replaces part of the cabin longitudinal beam assembly 3, and thus the length of the cabin longitudinal beam front segment 31 of the cabin longitudinal beam assembly 3 is only about 400mm, realizing the effect of shortening the traditional longitudinal beam assembly while greatly improving the strength.

[0042] As a preferred embodiment of this embodiment, the cabin longitudinal beam assembly 3 is fixedly connected with a front cross beam 9, and the left and right horizontal segments 12 of the cabin piece body 1 are fixedly connected with a rear cross beam 10. Specifically, the left and right end parts of the front cross beam 9 are fixedly connected with the rear parts of the two cabin longitudinal beam front segments 31 through the second support 7 by bolts, and the left and right end parts of the rear cross beam 10 are fixedly connected with the front parts of the horizontal segments 12 of the cabin piece body 1 through the third support 8 by bolts. The arrangement of the front cross beam 9 and the rear cross beam 10 avoids the intrusion into the passenger compartment during the collision process due to the deformation of the root part of the cabin piece body 1 in the left-right direction, resulting in the failure of the passenger protection zone.

[0043] As a preferred embodiment of this embodiment, in order to meet the lightweighting requirements of the vehicle body, the materials of the cabin longitudinal beam front segment 31, the front subframe assembly 4, the front cross beam 9 and the rear cross beam 10 are all aluminum alloy.

[0044] As a preferred embodiment of the present embodiment, the front anti-collision beam assembly 2 comprises a front anti-collision beam 21 and an energy absorption box 22 connected between the rear side of the front anti-collision beam 21 and the front end of the cabin longitudinal beam front section 31. Specifically, a first mounting plate 23 is fixedly connected to the rear end of the energy absorption box 22, and a second mounting plate 32 is fixedly connected to the front end of the cabin longitudinal beam front section 31, and the first mounting plate 23 and the second mounting plate 32 are connected by bolts, which is convenient and fast to assemble and stable and reliable in connection. In order to meet the lightweight requirement of the vehicle body, the front anti-collision beam 21 and the energy absorption box 22 are also made of aluminum alloy. Referring to Figure 8 , the energy absorption box 22 is designed with three closed connection structures in cross section, which ensures that the energy absorption box 22 has sufficient structural strength.

[0045] As a preferred embodiment of the present embodiment, the front subframe assembly 4 has a double-ring structure, which comprises first beams 41 arranged on the left and right sides, a second beam 42 connected between the front portions of the two first beams 41, a third beam 43 connected between the middle portions of the two first beams 41, and a fourth beam 44 connected between the rear portions of the two first beams 41. The third beam 43 has a three-closed-connection-structure cross section, and the first beam 41, the second beam 42, and the fourth beam 44 each have a single closed structure. The connection of the front subframe assembly 4 with the cabin longitudinal beam assembly 3 and the cabin body 1 can also transmit the force of the front subframe assembly 4 to the battery pack assembly 5 when a collision occurs, which can avoid the failure of the cabin body 1 due to excessive force, thereby achieving the purpose of protecting the passengers. At the same time, the double-ring structure of the front subframe assembly 4 can improve the connection stiffness of the suspension system, reduce the transmission of road excitation to the vehicle body, and improve the NVH performance of the vehicle.

[0046] As a preferred embodiment of the present embodiment, the battery pack box front cross beam 51 is provided with a through hole vertically penetrating the upper and lower side walls of the battery pack box front cross beam 51, the rear lower end of the first support 6 is provided with a rearwardly extending lug 63, and the first mounting bolt 61 is connected with the base plate 11 by penetrating the lug 63 and the through hole from bottom to top. The front end of the first support 6 is connected with the rear side of the fourth beam 44 of the front subframe assembly 4 by two second mounting bolts 62. The first support 6 is fixed between the fourth beam 44 of the front subframe assembly 4 and the base plate 11 of the cabin body 1 by bolt connection, which ensures the effective formation of the transmission path.

[0047] Embodiment three, a vehicle comprising the cast cabin part of embodiment one of the present application.

[0048] Embodiment four, a vehicle comprising the vehicle front anti-collision energy absorption structure of embodiment two of the present application.

[0049] The above embodiments are only the preferred embodiments of the present application for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A vehicle front anti-collision energy absorption structure, characterized by: It includes a front anti-collision beam assembly (2), a cabin longitudinal beam assembly (3), a front subframe assembly (4), a battery pack assembly (5) and a cast cabin component; The cast cabin component comprises a cabin component body (1) formed by integral casting of an aluminum alloy, the cabin component body (1) comprising a vertically arranged base plate (11), the base plate (11) serving as the lower plate of the front wall assembly; the left and right front sides of the base plate (11) are provided with horizontal sections (12) extending forward, the horizontal sections (12) serving as the rear sections of the cabin longitudinal beams; the upper front side of the cabin component body (1) is connected to the shock tower (100), the upper rear side of the cabin component body (1) is connected to the A-pillar assembly (200), and the lower part of the cabin component body (1) is connected to the door sill side beam (300); the rear side of the base plate (11) is connected to the front cross beam (51) of the battery pack box The cabin longitudinal beam assembly (3) includes cabin longitudinal beam front sections (31) provided on the left and right sides, the front anti-collision beam assembly (2) is connected between the front ends of the two cabin longitudinal beam front sections (31), and the front ends of the left and right horizontal sections (12) of the cabin component body (1) are respectively connected to the rear ends of the cabin longitudinal beam front sections (31) on the corresponding sides; The front portion of the front sub-frame assembly (4) is connected between the front portions of the two cabin longitudinal beam front sections (31), and the rear portion of the front sub-frame assembly (4) is connected between the left and right horizontal sections (12) of the cabin body (1); A plurality of first brackets (6) are connected between the rear side of the front subframe assembly (4) and the front side of the base plate (11) of the cabin body (1), and the front cross beam (51) of the battery pack box of the battery pack assembly (5) is connected to the rear side of the base plate (11).

2. The vehicle front anti-collision energy-absorbing structure according to claim 1, characterized in that: The invention also includes a front crossbeam (9) fixed to the cabin longitudinal beam assembly (3) and a rear crossbeam (10) fixed to the left and right horizontal sections (12) of the cabin component body (1), wherein the left and right ends of the front crossbeam (9) are fixedly connected to the rear parts of the two cabin longitudinal beam front sections (31) through a second bracket (7), and the left and right ends of the rear crossbeam (10) are fixedly connected to the front part of the horizontal section (12) of the cabin component body (1) through a third bracket (8).

3. The vehicle front anti-collision energy absorption structure according to claim 2, characterized in that: The cabin longitudinal beam front section (31), the front subframe assembly (4), the front crossbeam (9) and the rear crossbeam (10) are all made of aluminum alloy.

4. The vehicle front anti-collision energy-absorbing structure according to claim 1, characterized in that: The front anti-collision beam assembly (2) comprises a front anti-collision beam (21) and an energy absorption box (22) connected between the rear side of the front anti-collision beam (21) and the front end of the cabin longitudinal beam front section (31).

5. The vehicle front anti-collision energy-absorbing structure according to claim 1, characterized in that: The front subframe assembly (4) includes first beams (41) disposed on the left and right sides, a second beam (42) connected between the front portions of the two first beams (41), a third beam (43) connected between the middle portions of the two first beams (41), and a fourth beam (44) connected between the rear portions of the two first beams (41); The number of the first brackets (6) is two, and the two first brackets (6) are arranged between the rear side of the fourth beam (44) and the front side of the base plate (11) along the left-right direction.

6. The vehicle front anti-collision energy-absorbing structure according to claim 1, characterized in that: The front crossbeam (51) of the battery pack box is provided with a through hole that vertically penetrates the upper and lower side walls of the front crossbeam (51) of the battery pack box. The lower end of the first bracket (6) is provided with a support ear (63) extending backward. The first mounting bolt (61) passes through the support ear (63) and the through hole from bottom to top to connect with the base plate (11).

7. The vehicle front anti-collision energy-absorbing structure according to claim 1, characterized in that: The front end of the first bracket (6) is connected to the rear side of the front subframe assembly (4) using a second mounting bolt (62).

8. A vehicle, characterized in that: The vehicle front anti-collision energy-absorbing structure comprises the vehicle front anti-collision energy-absorbing structure according to any one of claims 1 to 7.

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