JPH08207825A - Car body structure of automobile - Google Patents

Abstract

PURPOSE: To simplify the car body structure of an automobile by connecting the end part of a side member and the end part of a cross member to each other through a gusset having its closed cross section and bending the extended part of an outer member so as to be connected to two surfaces sandwiching the outside surface of the gusset and the corner part of a cross member end. CONSTITUTION: The mounting flange 6C of a gusset 6 fixed on a cross member 5, is connected on the inner bottom wall 21 of an inner member 2, and a mounting flange 6B is connected on the lower surface of an opening side lower wall 22, and also a mounting flange 6A is connected on the flat plate outer wall part 30 of a first outer member 3, and a lower mounting flange 2B is held by a mounting flange 61A and the flat plate outer wall part 30. Therefore, in addition to connecting the cross member 5 and a side member 1 to each other by the gusset 6, the lower end bent part 32 of the first outer member 3 is put over the fixed surface 52 of the cross member 5 so that connecting rigidity between the cross member 5 and the side member 1 can be extremely improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front portion or a rear portion of a vehicle body, and side members extending on both sides of the vehicle body in a front-rear direction.
The present invention relates to a vehicle body structure of an automobile, which is characterized by a connection structure with a cross member extending in the vehicle width direction.

[0002]

2. Description of the Related Art Conventionally, in the front part of a vehicle body, a connecting portion between front side members extending in the front-rear direction on both sides of the vehicle body and a cross member extending in the vehicle body width direction, particularly a connecting portion between the front side member and the frontmost cross member. For example, as shown in FIG. 6, the structure of the front end member of the front side member a having a rectangular cross section extending in the front-rear direction on both sides of the vehicle body,
A structure in which an end portion of a cross member b extending in the vehicle body width direction is coupled via a coupling plate c, and a box structure portion having a space is interposed between a lower surface of the front side member a and an upper surface of the cross member b. It is known that such a material is used (see Japanese Utility Model Laid-Open No. 5-80976).

[0003]

However, in the above-described conventional connecting structure of the front side member a and the cross member b, the connecting plate c and the closing plate d suspended from the vehicle body outer surface of the front side member a.
Since they are connected through the box structure formed by and, there is a problem that the rigidity of the joint is insufficient. Also, attach the tie down hook to the front side member a.
However, since the tie-down hook is fixed to the closing plate d, the strength of the joint portion of the tie-down hook to which a large load is applied may be insufficient. In order to solve the above-mentioned problem, some reinforcing members are separately provided, but there is a problem that the number of parts increases, the structure becomes complicated, and the cost increases.

An object of the present invention is to improve the joint rigidity between the side member and the cross member at the front or rear of the vehicle and to simplify the structure without the need for a separate reinforcing member. It is to provide a body structure.

[0005]

In order to achieve the above object, a vehicle body structure of an automobile according to the present invention comprises an inner member having a U-shaped cross-section that is open on the outside of the vehicle body, and a front side of the inner member that covers the open side. A side member at a joint portion between a side member that extends in the vehicle body front-rear direction and includes a cross member that extends in the vehicle body width direction and that includes a first outer member and a second outer member that covers the opening side between the first outer members at both ends. And an end of the cross member are joined together via a gusset forming a closed cross section, and a first outer member extension portion formed by extending the first outer member is bent, and the first outer member is bent. The extension portion and the bent portion are joined to the vehicle body outer surface of the gusset and the two surfaces sandwiching the corner portion of the cross member end, whereby the joint rigidity between the side member and the cross member is improved. Since the tie down hook is connected to at least one of the first outer member and the second outer member of the side member, the gusset, and the cross member, the side member and the cross member can be provided without providing a separate reinforcing member. The joint rigidity of is improved. The tie-down hook plate is provided with a bent portion inward of the vehicle body, the bent portion is joined to a corner portion of the cross member end, and is joined to the cross member at the lower surface continuing to the corner portion, so that the side member and the cross member are crossed. The joint rigidity with the member is further improved. The second outer member is extended in the front-rear direction of the vehicle body, the first outer member and the second outer member extension are overlapped and joined, and the tie-down hook is fixed to the overlapping portion of the first outer member and the second outer member. By being done,
The strength of the fixed portion of the tie-down hook is improved without providing a separate reinforcing member.

[0006]

Embodiments of the present invention will be described with reference to FIGS. The side members 1 extending in the vehicle body front-rear direction on both sides of the vehicle body include an inner member 2 having a U-shaped cross-section that is open to the outside of the vehicle body, a first outer member 3 that covers the opening side of the inner member 2 at both ends in the vehicle body front-rear direction, and both ends. And a second outer member 4 that covers the open side of the inner member 2 between the first outer members 3.

Mounting flanges 2A and 2B extending in the front-rear direction of the vehicle body are respectively erected on the upper and lower ends of the inner member 2 on the open side, and the open side is extended continuously from the upper and lower ends of the inner bottom wall 21 toward the outer side of the vehicle body. The upper wall 21 is formed shorter than the lower wall 22 on the open side, and the upper end of the second outer member 4 is bent toward the inner member 2 side, that is, the inner side of the vehicle body, and the mounting flange 4A extending in the vehicle body front-rear direction is provided on the upper end thereof. The overlapping plate 41 is formed by providing shallow steps at both ends in the front-rear direction of the vehicle body, and an appropriate number of through holes 410 are formed in the overlapping plate 41.

The first outer member 3 has a flat plate outer wall portion 30 extending to a position below the inner member 2, and the flat plate outer wall portion 30.
An upper end bent portion 31 provided by bending the upper end of the plate, a mounting flange 3A standing on the end of the upper end bent portion 30, and a lower end of the flat plate outer wall portion 30, that is, an extension portion. The lower end bent portion 32 bent toward the member 2 side, that is, the inside of the vehicle body is provided, and the flat plate outer wall portion 30 is provided at a position matching the through hole 410 of the overlapping plate 41 of the second outer member 4. A through hole 301 is provided, and a through hole 302 is provided at substantially the center of the lower end bent portion 32.
A through hole 321 is formed in the.

The cross member 5 extending in the width direction of the vehicle body has a lower surface inclined upward toward the outside of the vehicle at an end portion in the vehicle width direction, and a fixing surface 52 is formed continuously with the corner portion 51.
A through hole 520 is formed in the mounting flange 5 at the widthwise end of the vehicle body.
A is provided. A gusset 6 is fixed to the upper surface of the end of the cross member 5, and the gusset 6 is inclined upward toward the outside of the vehicle body, and the gusset 6 extends outward of the vehicle body in succession to the inclined surface 60, and A pair of side walls 61 erected parallel to the front and rear side walls, mounting flanges 6A and 61A on the outer edge of the vehicle body of the side wall 61, and mounting flanges 6B on the upper edge of the side wall 61 respectively extend in a direction orthogonal to the side wall 61. , Mounting flange 6
A step is formed between A and the mounting flange 61A,
A mounting flange 6C is provided upright on the upper end of the slope 60.

The tie-down hook 7 includes the first outer member 3
A tie-down hook formed in a flat plate shape to be joined to the outer surface of the flat plate outer wall portion 30 of the vehicle body and having through holes 711 and through holes 712 that respectively match the through hole 301 and the through hole 302 of the flat plate outer wall portion 30. Plate 71 and Tie Down Hook Plate 71
Bending member 72 with the lower end bent and a through hole 721
And a hook member 73 made of a bar material formed in a substantially U shape, and the bent end of the hook member 73 projects downward from the lower end of the tie-down hook plate 71. Support flanges 71A and 71B are provided upright on the edge of the tie-down hook plate 71, and the hook members are formed by the support flanges 71A and 71B.
73 is fixedly supported.

Explaining the entire structure, the upper mounting flange 2A of the inner member 2 is left with a predetermined size for fixing the first outer member 3 to both ends of the inner member 2 in the vehicle front-rear direction, and the second outer member 4 is fixed. The mounting flange 4A is joined, and the lower end of the second outer member 4 is joined to the lower mounting flange 2B of the inner member 2 to cover the open side of the inner member 2. A part of the first outer member 3 is superposed on the overlapping plate 41 of the second outer member 4 to be attached to cover the open end of the inner member 2, and the first outer member 3 is attached to the upper mounting flange 2A of the inner member 2. Of the first outer member 3 is joined to the lower mounting flange 2B of the inner member 2, and the through hole 301 of the flat plate outer wall portion 30 and the through hole 410 of the overlapping plate 41 are joined together. I am doing it.

The mounting flange 6C of the gusset 6 fixed to the cross member 5 is joined to the inner bottom wall 21 of the inner member 2, the mounting flange 6B is joined to the lower surface of the open side lower wall 22, and the mounting flange 6A is It is joined to the flat plate outer wall portion 30 of the first outer member 3 (see FIG. 4) and has a mounting flange 61A.
Is joined to the inner surface of the vehicle body of the lower mounting flange 2B of the inner member 2, that is, the lower mounting flange 2B is sandwiched by the mounting flange 61A and the flat plate outer wall portion 30. The mounting flange 5A of the cross member 5 is the flat plate outer wall portion of the first outer member 3.
When it is joined to 30, the fixing surface 52 of the cross member 5
The lower end bent portion 32 of the first outer member 3 is connected to the through hole 520 and the through hole.
321 and are polymerized in agreement.

The tie-down hook plate 71 of the tie-down hook 7 is superposed on the outer surface of the flat outer wall portion 30 of the first outer member 3 on the vehicle body, and the bending member 72 is outside the lower end bending portion 32 of the first outer member 3. The through hole 721 and the through hole 321 are overlapped and overlapped on the side surface, and the bolt 8 penetrates the through holes 721, 321, and 520, and the bending member 72 of the tie-down hook 7 and the first outer member 3 are formed. The lower end bent portion 32 and the fixing surface 52 of the cross member 5 are fastened (see FIG. 3).

According to this structure, in addition to the cross member 5 and the side member 1 being joined by the gusset 6, the lower end bent portion 32 of the first outer member 3 is overlapped with the fixing surface 52 of the cross member 5. Therefore, the joint rigidity between the cross member 5 and the side member 1 can be significantly improved. Furthermore, since the bending member 72 of the tie-down hook 7 is overlapped and fastened, the joint rigidity can be further increased.

The through hole 410 of the overlapping plate 41, the through hole 301 of the flat plate outer wall portion 30, and the through hole 711 of the tie-down hook plate 71 are aligned and fastened with the bolt 8 (see FIG. 5). Further, the through hole 302 of the flat plate outer wall portion 30 and the through hole 712 of the tie-down hook plate 71 are aligned and fastened with the bolt 8.

According to this structure, since the overlapping plate 41 and the tie-down hook plate 71 of the first outer member 3 and the second outer member 4 are overlapped and fastened, the strength of the mounting portion of the tie-down hook 7 is increased. It is possible to do so, and it is not necessary to provide a separate reinforcing member.

As shown in FIGS. 2 and 5, a bumper bracket 9 is fitted and fixed to the inside of the end opening of the side member 1, and as shown in FIG.
A front fender apron 10 is provided near the front end of the side member 1.

[0018]

Since the present invention is configured as described above, it has the following effects. The end portion of the side member and the end portion of the cross member are joined via a gusset forming a closed cross section, and a first outer member extension portion formed by extending the first outer member is bent, and the first outer member is bent. The member extension portion and the bent portion are joined to the vehicle body outer side surface of the gusset and the two surfaces sandwiching the corner portion of the cross member end, whereby the joint rigidity between the side member and the cross member is improved. Since the tie-down hook is coupled to at least one of the first outer member or the second outer member of the side member, the gusset, and the cross member, the side member and the cross member can be provided without providing a separate reinforcing member. The joint rigidity of is improved. The tie-down hook plate is provided with a bent portion inwardly of the vehicle body, and the bent portion is joined to a corner of the end of the cross member. The joint rigidity with the member is further improved. The second outer member is extended in the front-rear direction of the vehicle body, the first outer member and the second outer member extension are overlapped and joined, and the tie-down hook is fixed to the overlapping portion of the first outer member and the second outer member. As a result, the strength of the fixing portion of the tie-down hook is improved without providing a separate reinforcing member.

[Brief description of drawings]

FIG. 1 is an assembly diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

3 is a sectional view taken along line II-II in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is a perspective view showing a conventional front vehicle body structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 side member, 2 inner member, 3 1st outer member 4 2nd outer member, 5 cross member, 6 gasat 7 tie down hook, 8 bolt, 9 bumper bracket

Claims (4)

[Claims] 1. An inner member having a U-shaped cross-section that is open to the outside of the vehicle body, a first outer member that covers the open side at the front and rear ends of the inner member, and a second cover that covers the open side between the first outer members at both ends. In a connecting portion of a side member including an outer member extending in the vehicle front-rear direction and a cross member extending in the vehicle width direction, an end of the side member and an end of the cross member form a closed section through a gusset. The first outer member extension portion, which is formed by extending the first outer member while being joined, is bent, and the first outer member extension portion and the bent portion are formed on the vehicle body outer surface of the gusset and the cross member end. A vehicle body structure characterized by being joined to two surfaces sandwiching a corner. 2. The vehicle body according to claim 1, wherein the tie down hook is connected to at least one of the first outer member and the second outer member of the side member, the gusset and the cross member. Construction. 3. The tie-down hook plate is provided with a bent portion inwardly of the vehicle body, the bent portion is joined to a corner of the end of the cross member, and is joined to the cross member at a lower surface connected to the corner. The vehicle body structure for an automobile according to claim 2. 4. The second outer member is extended in the front-rear direction of the vehicle body, and the first outer member and the second outer member extension are overlapped and joined to each other to form a superposed portion between the first outer member and the second outer member. The vehicle body structure according to claim 2, wherein the tie down hook is fixed.