Column A lower anti-collision structure and mounting method

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to an A-pillar lower anti-collision structure and an installation method, and the A-pillar lower anti-collision structure comprises an A-pillar lower hinge pillar (1); the A column lower hinge column (1) is connected with a front cabin vertical plate (2); a front vertical plate connecting plate (3) and a column A lower reinforcing plate (4) are respectively arranged on the column A lower hinge column (1); a cavity structure is arranged between the front vertical plate connecting plate (3) and the A column lower reinforcing plate (4); the cavity structure is arranged on one side of the front cabin vertical plate (2) and one side of the A column lower hinge column (1); the front vertical plate connecting plate and the A column lower reinforcing plate form a cavity anti-collision structure with a closed section in front of the A column lower hinge column and the forecabin vertical plate, so that the structural strength of the lower portion of the A column is enhanced, and meanwhile the connecting strength of the forecabin vertical plate and the A column lower hinge column is enhanced. The intrusion amount of the A column lower hinge column during small offset collision can be effectively reduced, and the problem that wheels intrude into a cab is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to an A-pillar lower anti-collision structure and an installation method thereof. Background Art

[0002] With the continuous development of the automobile industry, the market has increasingly higher requirements for the collision safety performance of vehicles. When a vehicle is in a small offset collision, the tires will hit and squeeze the A-pillar lower hinge column and the front cabin vertical plate, causing serious deformation of the A-pillar lower hinge column and the front cabin vertical plate, resulting in excessive intrusion, and the connection between the A-pillar lower hinge column and the front cabin vertical plate is easily torn, causing the wheel to invade the cockpit, seriously threatening the life safety of the driver in the vehicle. Currently, most models on the market only rely on spot welding or a single-layer connecting plate to connect the A-pillar lower hinge column and the front cabin vertical plate, with poor anti-collision performance. Therefore, in a small offset collision, the tearing of the connection between the A-pillar lower hinge column and the front cabin vertical plate and the problem of the wheel invading the cockpit cannot be well solved.

[0003] After searching, the applicant found that the Chinese patent document with publication number 217048785U disclosed a lower A-pillar of an automobile, an A-pillar of an automobile and an automobile on July 26, 2022. The lower A-pillar of the automobile includes a lower A-pillar inner panel, a lower A-pillar outer panel, a first hinge reinforcement plate and a second hinge reinforcement plate. The area between the first hinge reinforcement plate and the second hinge reinforcement plate of the lower A-pillar outer panel and the lower A-pillar inner panel is the main deformation area; the lower A-pillar of the automobile also includes a first support member and a second support member, and the first support member and the second support member are arranged on the main deformation area of ​​the lower A-pillar outer panel; the device also cannot solve the above-mentioned technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide an A-pillar lower anti-collision structure and an installation method that can improve the connection strength and anti-collision performance of the A-pillar lower hinge column and the front cabin vertical plate. Summary of the invention

[0005] The object of the present invention is to provide an A-pillar lower anti-collision structure and an installation method thereof, which can improve the connection strength and anti-collision performance of the A-pillar lower hinge pillar and the front cabin vertical plate.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an A-pillar lower anti-collision structure, including an A-pillar lower hinge column; the A-pillar lower hinge column is connected to a front cabin vertical plate; a front vertical plate connecting plate and an A-pillar lower reinforcement plate are respectively provided on the A-pillar lower hinge column; a cavity structure is provided between the front vertical plate connecting plate and the A-pillar lower reinforcement plate; the cavity structure is provided on one side of the front cabin vertical plate and the A-pillar lower hinge column.

[0007] The front vertical plate connecting plate includes a bending section; the front cabin vertical plate includes a first front cabin vertical plate connecting section; the A-pillar lower hinge column includes a hinge column connecting section; the first front cabin vertical plate connecting section is connected to the hinge column connecting section; the cavity structure includes a first cavity; the first cavity is arranged in the bending section; the first front cabin vertical plate connecting section and the hinge column connecting section are both arranged in the first cavity.

[0008] A first connecting plate connecting section and a second connecting plate connecting section are respectively provided on both sides of the bending section; the A-pillar lower reinforcement plate includes a first reinforcement plate connecting section; a second reinforcement plate connecting section and a third reinforcement plate connecting section are respectively provided on both sides of the first reinforcement plate connecting section; the first connecting plate connecting section and the second reinforcement plate connecting section are connected; and a second cavity is provided between the first connecting plate connecting section and the first reinforcement plate connecting section.

[0009] One side of the second connecting plate connecting section is connected to the hinge column connecting section; the other side of the second connecting plate connecting section is connected to the third reinforcing plate connecting section; and a third cavity is provided between the second connecting plate connecting section and the third reinforcing plate connecting section.

[0010] The first front cabin vertical plate connecting section is connected with a front baffle cross beam; one end of the front baffle cross beam is connected to the first front cabin vertical plate connecting section; the other end of the front baffle cross beam is connected to the lower part of the front baffle body.

[0011] The front vertical plate connecting plate and the A-pillar lower reinforcing plate are both connected with a first connecting bolt; the front fender cross beam is provided with a first projection welding nut; the first connecting bolt is connected in the first projection welding nut.

[0012] The first front cabin vertical plate connecting section is connected to the second front cabin vertical plate connecting section; the second front cabin vertical plate connecting section is connected to the front longitudinal beam supporting plate; one end of the front longitudinal beam supporting plate is connected to the second front cabin vertical plate connecting section; the other end of the front longitudinal beam supporting plate is connected to the front longitudinal beam; the front longitudinal beam is connected to the lower part of the front baffle body.

[0013] The front vertical plate connecting plate and the A-pillar lower reinforcing plate are both connected with second connecting bolts; the front longitudinal beam supporting plate is provided with a second projection welding nut; the second connecting bolt is connected in the second projection welding nut.

[0014] A method for installing the anti-collision structure under the A-pillar, the method comprising the following steps:

[0015] 1) Connect the front vertical plate connecting plate to the A-pillar lower reinforcement plate;

[0016] 2) Connect the front baffle cross beam to the front cabin vertical plate and the lower part of the front baffle body respectively;

[0017] 3) Connecting the front longitudinal beam support plate to the front longitudinal beam and the front cabin vertical plate respectively; connecting the front longitudinal beam to the lower part of the front baffle body;

[0018] 4) Connect the front vertical plate connecting plate and the A-pillar lower reinforcement plate to the A-pillar lower hinge column, the front fender crossbeam and the front longitudinal beam support plate respectively.

[0019] In the step 1), the front vertical plate connecting plate is welded to the A-pillar lower reinforcement plate; in the step 2), the two ends of the front fender cross beam are respectively welded to the front compartment vertical plate and the lower part of the front fender body; in the step 3), the front longitudinal beam support plate is respectively welded to the front longitudinal beam and the front compartment vertical plate; the front longitudinal beam is welded to the lower part of the front fender body.

[0020] The beneficial effects of this application are:

[0021] The front vertical plate connecting plate and the A-pillar lower reinforcement plate of the present application form a closed-section cavity anti-collision structure in front of the A-pillar lower hinge column and the front cabin vertical plate, thereby reinforcing the lower structural strength of the A-pillar, and also strengthening the connection strength between the front cabin vertical plate and the A-pillar lower hinge column; it can effectively reduce the intrusion amount of the A-pillar lower hinge column during a small offset collision, solve the problem of the wheel intruding into the cockpit, and improve the vehicle's safety collision performance during a small offset collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a structural schematic diagram of the anti-collision structure under the A-pillar.

[0024] Figure 2 This is an exploded view of the anti-collision structure under the A-pillar.

[0025] Figure 3 This is a cross-sectional view of the anti-collision structure under the A-pillar.

[0026] Figure 4 This is a schematic diagram of the connection status of the front vertical plate connecting plate and the A-pillar lower reinforcement plate of the A-pillar lower anti-collision structure.

[0027] The marks in the above figure are:

[0028] The markings in the figure are:

[0029] 1. A-pillar lower hinge column, 101. Hinge column connecting section,

[0030] 2. front cabin vertical plate, 201. first front cabin vertical plate connecting section, 202. second front cabin vertical plate connecting section,

[0031] 3. front vertical plate connecting plate, 301. bending section, 302. first connecting plate connecting section, 303. second connecting plate connecting section,

[0032] 4. A-pillar lower reinforcement plate, 401. first reinforcement plate connecting section, 402. second reinforcement plate connecting section, 403. third reinforcement plate connecting section,

[0033] 5. First cavity, 501, second cavity, 502, third cavity,

[0034] 6. Front fender crossbeam,

[0035] 7. The lower part of the front baffle body,

[0036] 8. First connecting bolt, 801. First projection welding nut,

[0037] 9. Front longitudinal beam support plate,

[0038] 10. Front longitudinal beam,

[0039] 11. A second connecting bolt, 111. A second projection welding nut. DETAILED DESCRIPTION

[0040] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0041] Figure 1 The A-pillar lower anti-collision structure shown includes an A-pillar lower hinge column 1; the A-pillar lower hinge column 1 is connected to a front cabin vertical plate 2; a front vertical plate connecting plate 3 and an A-pillar lower reinforcement plate 4 are respectively provided on the A-pillar lower hinge column 1; a cavity structure is provided between the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4; the cavity structure is provided on one side of the front cabin vertical plate 2 and the A-pillar lower hinge column 1.

[0042] The front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 form a closed-section cavity anti-collision structure in front of the A-pillar lower hinge column 1 and the front cabin vertical plate 2, thereby reinforcing the lower structural strength of the A-pillar, and also strengthening the connection strength between the front cabin vertical plate 2 and the A-pillar lower hinge column 1; it can effectively reduce the intrusion amount of the A-pillar lower hinge column 1 during a small offset collision, solve the problem of the wheel intruding into the cockpit, and improve the safety collision performance of the vehicle during a small offset collision; the material of the A-pillar lower reinforcement plate 4 is HC420 / 780DPD+Z, with a material thickness of 2.5mm; the material of the front vertical plate connecting plate 3 is HC420 / 780DPD+Z, with a material thickness of 2.5mm.

[0043] The front vertical plate connecting plate 3 includes a bending section 301; the front cabin vertical plate 2 includes a first front cabin vertical plate connecting section 201; the A-pillar lower hinge column 1 includes a hinge column connecting section 101; the first front cabin vertical plate connecting section 201 is connected to the hinge column connecting section 101; the cavity structure includes a first cavity 5; the first cavity 5 is arranged in the bending section 301; the first front cabin vertical plate connecting section 201 and the hinge column connecting section 101 are both arranged in the first cavity 5.

[0044] The cross-section of the bending section 301 is U-shaped; the first cavity 5 is provided in the bending section 301; the cross-sections of the first front cabin vertical plate connecting section 201 and the hinge pillar connecting section 101 are both Z-shaped structures; the ends of the first front cabin vertical plate connecting section 201 and the hinge pillar connecting section 101 are welded; and the ends of the first front cabin vertical plate connecting section 201 and the hinge pillar connecting section 101 are inserted into the first cavity 5 of the bending section 301; when the vehicle is impacted, the bending section 301 can effectively buffer the connection between the first front cabin vertical plate connecting section 201 and the hinge pillar connecting section 101.

[0045] A first connecting plate connecting section 302 and a second connecting plate connecting section 303 are respectively provided on both sides of the bending section 301; the A-pillar lower reinforcement plate 4 includes a first reinforcement plate connecting section 401; a second reinforcement plate connecting section 402 and a third reinforcement plate connecting section 403 are respectively provided on both sides of the first reinforcement plate connecting section 401; the first connecting plate connecting section 302 and the second reinforcement plate connecting section 402 are connected; and a second cavity 501 is provided between the first connecting plate connecting section 302 and the first reinforcement plate connecting section 401.

[0046] The first connecting plate connecting section 302 and the second connecting plate connecting section 303 are respectively arranged on both sides of the bending section 301, and are an integral structure with the bending section 301; the second reinforcing plate connecting section 402 and the third reinforcing plate connecting section 403 are respectively arranged on both sides of the first reinforcing plate connecting section 401, and are an integral structure with the first reinforcing plate connecting section 401; the bending section 301 is spot-welded to the first reinforcing plate connecting section 401; the first connecting plate connecting section 302 and the second reinforcing plate connecting section 402 are spot-welded; the second cavity 501 is arranged between the first connecting plate connecting section 302, the first reinforcing plate connecting section 401 and the bending section 301.

[0047] One side of the second connecting plate connecting section 303 is connected to the hinge column connecting section 101 ; the other side of the second connecting plate connecting section 303 is connected to the third reinforcing plate connecting section 403 ; and a third cavity 502 is provided between the second connecting plate connecting section 303 and the third reinforcing plate connecting section 403 .

[0048] The third cavity 502 is arranged between the second connecting plate connecting section 303, the bending section 301 and the third reinforcing plate connecting section 403; the second cavity 501 and the third cavity 502 can enhance the overall structural strength; when the vehicle is impacted, the second cavity 501 and the third cavity 502 can provide effective buffering.

[0049] The first front cabin vertical plate connecting section 201 is connected with the front baffle cross beam 6 ; one end of the front baffle cross beam 6 is connected to the first front cabin vertical plate connecting section 201 ; the other end of the front baffle cross beam 6 is connected with the lower part 7 of the front baffle body.

[0050] One end of the front fender crossbeam 6 is welded to the first front cabin vertical plate connecting section 201; the other end of the front fender crossbeam 6 is welded to the lower part 7 of the front fender body; the front fender crossbeam 6 is bolted to the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4; thus, the front fender crossbeam 6 can provide an installation position for the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4, and when the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are impacted, the front fender crossbeam 6 can transfer and disperse the impact force, so that the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 have stronger impact resistance.

[0051] The front vertical plate connecting plate 3 and the A-pillar lower reinforcing plate 4 are both connected with first connecting bolts 8 ; the front fender cross beam 6 is provided with a first projection welding nut 801 ; the first connecting bolt 8 is connected in the first projection welding nut 801 .

[0052] The front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are welded; the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are both provided with bolt mounting holes, and the first connecting bolt 8 is installed in the bolt mounting hole; the bolt mounting hole is provided on the side of the A-pillar lower reinforcement plate 4 close to the front fender cross beam 6; a plurality of first projection welding nuts 801 are installed on the top surface of the front fender cross beam 6; the first connecting bolt 8 is threadedly connected with the first projection welding nut 801, so that the side edges of the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 can be fixed on the front fender cross beam 6.

[0053] The first front cabin vertical plate connecting section 201 is connected to the second front cabin vertical plate connecting section 202; the second front cabin vertical plate connecting section 202 is connected to the front longitudinal beam supporting plate 9; one end of the front longitudinal beam supporting plate 9 is connected to the second front cabin vertical plate connecting section 202; the other end of the front longitudinal beam supporting plate 9 is connected to the front longitudinal beam 10; the front longitudinal beam 10 is connected to the lower part 7 of the front baffle body.

[0054] The second front cabin vertical plate connecting section 202 and the first front cabin vertical plate connecting section 201 are an integral structure; the end of the front longitudinal beam support plate 9 is welded to the second front cabin vertical plate connecting section 202; the front longitudinal beam support plate 9 is arranged on one side of the front fender cross beam 6; one end of the front longitudinal beam support plate 9 is first welded to the front longitudinal beam 10; the front longitudinal beam support plate 9 is spliced ​​with the front fender cross beam 6; the other end of the front longitudinal beam support plate 9 is welded to the second front cabin vertical plate connecting section 202; the front longitudinal beam 10 is welded to the lower part of the front fender body 7.

[0055] The front vertical plate connecting plate 3 and the A-pillar lower reinforcing plate 4 are both connected with second connecting bolts 11 ; the front longitudinal beam supporting plate 9 is provided with second projection welding nuts 111 ; the second connecting bolts 11 are connected to the second projection welding nuts 111 .

[0056] The front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are welded; the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are both provided with bolt mounting holes, and the second connecting bolts 11 are installed in the bolt mounting holes; the bolt mounting holes are provided on the side of the A-pillar lower reinforcement plate 4 close to the front longitudinal beam support plate 9; a plurality of second projection welding nuts 111 are installed on the top surface of the front longitudinal beam support plate 9; the second connecting bolts 11 are threadedly connected with the second projection welding nuts 111, so that the side edges of the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 can be fixed on the front longitudinal beam support plate 9.

[0057] A method for installing an anti-collision structure under an A-pillar, the installation method comprising the following steps:

[0058] 1) Connect the front vertical plate connecting plate 3 with the A-pillar lower reinforcement plate 4;

[0059] 2) Connect the front baffle cross beam 6 to the front cabin vertical plate 2 and the lower part 7 of the front baffle body respectively;

[0060] 3) Connect the front longitudinal beam support plate 9 to the front longitudinal beam 10 and the front cabin vertical plate 2 respectively; connect the front longitudinal beam 10 to the lower part of the front fender body 7;

[0061] 4) Connect the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 to the A-pillar lower hinge column 1, the front fender cross beam 6 and the front longitudinal beam support plate 9 respectively.

[0062] In step 1), the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 are welded to form the A-pillar lower reinforcement plate assembly; in step 2), the front fender crossbeam 6 is welded to the front cabin vertical plate 2 and the lower part of the front fender body 7 respectively; in step 3), the front longitudinal beam support plate 9 and the front longitudinal beam 10 are welded to form the front longitudinal beam assembly; and then the front longitudinal beam assembly is welded to the front cabin vertical plate 2 and the lower part of the front fender body 7 respectively; in step 4), the A-pillar lower reinforcement plate assembly is connected and fixed to the A-pillar lower hinge column 1, the front longitudinal beam support plate 9, and the convex welding nut in the front fender crossbeam 6.

[0063] In step 1), the front vertical plate connecting plate 3 is welded to the A-pillar lower reinforcement plate 4; in step 2), the two ends of the front fender cross beam 6 are respectively welded to the front cabin vertical plate 2 and the lower part of the front fender body 7; in step 3), the front longitudinal beam support plate 9 is respectively welded to the front longitudinal beam 10 and the front cabin vertical plate 2; the front longitudinal beam 10 is welded to the lower part of the front fender body 7.

[0064] The specific workflow of the present invention is as follows:

[0065] 1) Connect the front vertical plate connecting plate 3 with the A-pillar lower reinforcement plate 4;

[0066] 2) Connect the front baffle cross beam 6 to the front cabin vertical plate 2 and the lower part 7 of the front baffle body respectively;

[0067] 3) Connect the front longitudinal beam support plate 9 to the front longitudinal beam 10 and the front cabin vertical plate 2 respectively; connect the front longitudinal beam 10 to the lower part of the front fender body 7;

[0068] 4) Connect the front vertical plate connecting plate 3 and the A-pillar lower reinforcement plate 4 to the A-pillar lower hinge column 1, the front fender cross beam 6 and the front longitudinal beam support plate 9 respectively.

[0069] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An A-pillar lower anti-collision structure, characterized in that: The invention comprises an A-pillar lower hinge column (1); the A-pillar lower hinge column (1) is connected to a front cabin vertical plate (2); a front vertical plate connecting plate (3) and an A-pillar lower reinforcement plate (4) are respectively provided on the A-pillar lower hinge column (1); a cavity structure is provided between the front vertical plate connecting plate (3) and the A-pillar lower reinforcement plate (4); the cavity structure is provided on one side of the front cabin vertical plate (2) and the A-pillar lower hinge column (1).

2. The A-pillar lower anti-collision structure according to claim 1, characterized in that: The front vertical plate connecting plate (3) comprises a bending section (301); the front cabin vertical plate (2) comprises a first front cabin vertical plate connecting section (201); the A-pillar lower hinge column (1) comprises a hinge column connecting section (101); the first front cabin vertical plate connecting section (201) is connected to the hinge column connecting section (101); the cavity structure comprises a first cavity (5); the first cavity (5) is arranged in the bending section (301); the first front cabin vertical plate connecting section (201) and the hinge column connecting section (101) are both arranged in the first cavity (5).

3. The A-pillar lower anti-collision structure according to claim 2, characterized in that: A first connecting plate connecting section (302) and a second connecting plate connecting section (303) are respectively provided on both sides of the bending section (301); the A-pillar lower reinforcement plate (4) includes a first reinforcement plate connecting section (401); a second reinforcement plate connecting section (402) and a third reinforcement plate connecting section (403) are respectively provided on both sides of the first reinforcement plate connecting section (401); the first connecting plate connecting section (302) and the second reinforcement plate connecting section (402) are connected; and a second cavity (501) is provided between the first connecting plate connecting section (302) and the first reinforcement plate connecting section (401).

4. The A-pillar lower anti-collision structure according to claim 3, characterized in that: One side of the second connecting plate connecting section (303) is connected to the hinge column connecting section (101); the other side of the second connecting plate connecting section (303) is connected to the third reinforcing plate connecting section (403); and a third cavity (502) is provided between the second connecting plate connecting section (303) and the third reinforcing plate connecting section (403).

5. The A-pillar lower anti-collision structure according to any one of claims 3 to 4, characterized in that: The first front cabin vertical plate connecting section (201) is connected to a front baffle crossbeam (6); one end of the front baffle crossbeam (6) is connected to the first front cabin vertical plate connecting section (201); and the other end of the front baffle crossbeam (6) is connected to a lower part of a front baffle body (7).

6. The A-pillar lower anti-collision structure according to claim 5, characterized in that: The front vertical plate connecting plate (3) and the A-pillar lower reinforcing plate (4) are both connected with a first connecting bolt (8); the front fender cross beam (6) is provided with a first projection welding nut (801); and the first connecting bolt (8) is connected to the first projection welding nut (801).

7. The A-pillar lower anti-collision structure according to claim 6, characterized in that: The first front cabin vertical plate connecting section (201) is connected to the second front cabin vertical plate connecting section (202); the second front cabin vertical plate connecting section (202) is connected to the front longitudinal beam supporting plate (9); one end of the front longitudinal beam supporting plate (9) is connected to the second front cabin vertical plate connecting section (202); the other end of the front longitudinal beam supporting plate (9) is connected to the front longitudinal beam (10); the front longitudinal beam (10) is connected to the lower part (7) of the front baffle body.

8. The A-pillar lower anti-collision structure according to claim 7, characterized in that: The front vertical plate connecting plate (3) and the A-pillar lower reinforcing plate (4) are both connected with a second connecting bolt (11); the front longitudinal beam supporting plate (9) is provided with a second projection welding nut (111); the second connecting bolt (11) is connected to the second projection welding nut (111).

9. A method for installing the anti-collision structure under the A-pillar according to any one of claims 1 to 8, characterized in that: The installation method comprises the following steps: 1) Connect the front vertical plate connecting plate (3) to the A-pillar lower reinforcement plate (4); 2) connecting the front baffle cross beam (6) to the front cabin vertical plate (2) and the lower part of the front baffle body (7) respectively; 3) connecting the front longitudinal beam support plate (9) to the front longitudinal beam (10) and the front cabin vertical plate (2) respectively; connecting the front longitudinal beam (10) to the lower part of the front baffle body (7); 4) The front vertical plate connecting plate (3) and the A-pillar lower reinforcing plate (4) are respectively connected to the A-pillar lower hinge column (1), the front fender cross beam (6) and the front longitudinal beam supporting plate (9).

10. The installation method according to claim 9, characterized in that: In the step 1), the front vertical plate connecting plate (3) is welded to the A-pillar lower reinforcement plate (4); in the step 2), the two ends of the front fender cross beam (6) are respectively welded to the front cabin vertical plate (2) and the lower part of the front fender body (7); in the step 3), the front longitudinal beam support plate (9) is respectively welded to the front longitudinal beam (10) and the front cabin vertical plate (2); the front longitudinal beam (10) is welded to the lower part of the front fender body (7).

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