JP2002337746A - Car body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car body front structure capable of improving rigidity of a wheel arch part. SOLUTION: In this car body front structure, a front pillar part X is formed by joining the back end of a dash side panel 20 to the front end of a side body outer panel 10, the lower side of the front pillar part X is provided with a front wheel house panel 30 joining with the front end of the side body outer panel 10, and a wheel arch part Y is formed of the lower end of the front part of the side body outer panel 10 and the front wheel house panel 30. The front part structure has built-in reinforcements 40 integrated from the front pillar part X to the wheel arch part Y and a side sill part Z.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure capable of improving vehicle body rigidity from a front pillar portion to a wheel arch portion and a side sill portion.

[0002]

2. Description of the Related Art FIG. 10 shows a front side of a vehicle body.
FIG. 11 shows a cross-sectional structure of the lower part of the front pillar. A front pillar portion 100 and a side sill portion 101 are provided on the front side surface of the vehicle body. As conceptually shown in FIG. 12, the front pillar portion 100 and the side sill portion 10 are provided.
Reference numeral 1 denotes a structure connected by one front wheel house panel 102. As shown in FIG. 11, the side body outer panel 103, the dash side panel 104, and the front wheel house panel 102 are usually combined with each other to form a vehicle body side, as shown in FIG. The structure is such that the body outer panel 103 and the dash side panel 104 are connected by the front wheel house panel 102. On the rear side of the dash side panel 104, one side of the side body outer panel 103 and one side of the front wheel house panel 102 are joined to each other to form a front wheel house portion formed of one wall surface.

For this reason, as shown in FIGS. 12 and 13 before and after deformation, when a load is applied from the front, the front wheel house panel 102 may be deformed below the front pillar portion 100. .

[0004] Therefore, a vehicle front structure for reinforcing the front wheel house panel 102 has been filed (Japanese Patent Application Laid-Open No. H11-78989). This prior art will be described with reference to FIGS. 14 to 17. A front body A is provided with a side body outer panel 105, a dash side panel 106, and a front wheel house panel 1.
07 is disposed, and the side body outer panel 10 is provided.
5 and the rear end of the dash side panel 106 are joined to a closed cross section, and reinforcement 108 is disposed inside the closed cross section to reinforce it, thereby forming a front pillar section 109 having a closed cross section structure. ing. On the other hand, the side body outer panel 105 and a side panel of a main floor pan (not shown) constitute a side sill portion 110 having a closed cross-sectional structure. In FIGS. 15 to 17, *
The mark indicates the welding location.

A lower portion of the front pillar portion 109 is provided with a front wheel house panel 107 having a constant width and extending between the front pillar portion 109 and the side sill portion 110 and joined to a lower end portion of the side body outer panel 105. A front wheel house side that forms a closed cross section so as to extend over the lower surface of the side body outer panel 105 and the lower surface of the front wheel house panel 107 along a joint w between the lower end of the body outer panel 105 and one side of the front wheel house panel 107. The member 111 is connected to the front wheel house panel 107 and the side body outer panel 10 via both side portions 111a.
5 are joined together. Thus, the front pillar portion 109 having the closed cross-sectional structure and the side sill portion 1 having the closed cross-sectional structure are provided.
10 are connected by a closed cross section S, and a double-walled wall surface is formed on the lower surface side of the front wheel house portion.

According to the above configuration, the front pillar portion 109 having a closed cross-sectional structure and the side sill portion 110 having a closed cross-sectional structure are provided.
Are connected by the closed cross section S, and a double-walled wall is formed on the lower surface side of the front wheel house portion, so that the rigidity of the vehicle body can be improved. Further, since the front wheel house can be made strong against a load applied from the front, deformation of the front wheel house can be prevented.

[0007]

However, according to the above-mentioned front structure of the vehicle body, the front wheel house, that is, the wheel arch has only a slight closed cross section S, so that the wheel is not affected by an impact load from the front. The rigidity of the arch portion may be insufficient.

An object of the present invention is to solve the above-mentioned problems and to provide a vehicle body front structure capable of improving the rigidity of a wheel arch portion.

[0009]

According to the present invention, a front pillar portion is formed by joining a rear end portion of a dash side panel to a front end portion of a side body outer panel, and a lower portion of the front pillar portion is formed. On the side, a front wheel house panel is provided by joining to a front end of the side body outer panel, and a front lower end of the side body outer panel and a front wheel house panel are provided.
In the vehicle body front structure in which the wheel arch portion is formed, a reinforcement integrated from the front pillar portion to the wheel arch portion and the side sill portion is incorporated. Further, the present invention resides in that a reinforcement, a side body outer panel, and a front wheel house side member are installed in the wheel arch portion, and a closed cross section is formed therebetween. Further, according to the present invention, the reinforcement and the front wheel house side member form a first closed cross section, and the reinforcement and the side body outer panel disposed outside the reinforcement include a first closed section. 2 in that a closed cross section is formed. Still further, in the present invention, a sub-reinforcement is added inside the reinforcement. Further, in the present invention, the side sill portion is constituted by a reinforcement, a side body outer panel, and a center pillar lower panel, and two closed cross sections are formed inside the side sill portion. Further, the present invention resides in that each of the panels and the reinforcement is joined to each other at a place where two or three sheets overlap.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 7 show a vehicle body front structure according to the present invention. FIG. 1 is a conceptual diagram of a vehicle body showing a state where a side body outer panel is removed, and FIG. 2 is a vehicle body front part shown in FIG. FIG. 3 is a perspective view showing a front portion of the vehicle body in FIG. 2, FIGS. 4 to 6 are cross-sectional views of various parts in FIG. 3, and FIG. 7 is a state in which reinforcement is removed in FIG. FIG.

1 to 3, a front pillar portion X forming a door opening B, a wheel arch portion Y, and a side sill portion Z are provided at a front portion A of a vehicle body. These front pillar portion X and wheel arch portion Y
The side sill portion Z includes an outer side body outer panel 10, various inner side panels, and reinforcement for reinforcement.

Hereinafter, the structures of the front pillar portion X, the wheel arch portion Y, and the side sill portion Z will be described.
As shown in FIG. 3, the front pillar portion X includes a side body outer panel 10, a dash side panel 20,
And the upper end 31 of the front wheel house panel 30. At the front end of the side body outer panel 10, as shown in FIG. 4, a rectangular pillar portion 11 forming a front pillar portion X is provided, and a flange portion 11 a provided on both sides of the pillar portion 11 in a vertical direction; The rear end portion 21 of the dash side panel 20 is joined to each other by spot welding w to form a front pillar portion X having a closed cross section S1. Inside this closed section S1,
A pillar portion 41 of a reinforcement 40 (hinge) for reinforcing a hinge portion to be described later is disposed on the inner surface of the pillar portion 11 so as to reinforce a hinge portion for attaching a door (not shown). Pillar part 4 of reinforcement 40
3 is spot-welded w between the flange portions 11a of the pillar portion 11 and the rear end portion 21 of the dash side panel 20 via the flange portions 41a (see FIG. 4).

As shown in FIG. 5, the wheel arch portion Y includes a wheel house portion 32 of a front wheel house panel 30 disposed below the front pillar portion X.
The arch 12 of the side body outer panel 10, the wheel house 32, and the side body outer panel 1
0 and the front wheel house side member 50 bridged over the arch portion 12 of the vehicle. Front wheel house panel 30 and side body outer panel 1
Reference numeral 0 denotes a circle formed by spot welding the vehicle width direction outer flange portion 32a of the wheel house portion 32 of the front wheel house panel 30 and the vehicle width direction inner flange portion 12a of the arch portion 12 of the side body outer panel 10 to each other. An arcuate curved surface is formed. An arc-shaped front wheel house side member 50 is spanned between the wheel house 32 of the front wheel house panel 30 and the arch 12 of the side body outer panel 10 on the arch 12 of the side body outer panel 10 and spotted. Welded.

Front wheel house side member 50
In the middle part in the vehicle width direction, a rectangular bent portion 51 protruding toward the tire side is formed along the circumferential direction of the tire, and the vehicle width direction inner flange portion 50a of the front wheel house side member 50 is formed. It is joined to the arch portion 12 of the side body outer panel 10 by spot welding w. The vehicle width direction inner flange portion 50a of the front wheel house side member 50 includes a vehicle width direction outer flange portion 32a of the wheel house portion 32 of the front wheel house panel 30 and a vehicle width direction inner flange of the arch portion 12 of the side body outer panel 10. The three parts are joined together by spot welding w together with the part 12a. The vehicle width direction outer flange portion 50b of the front wheel house side member 50 is spot welded to the arch portion 12 of the side body outer panel 10 together with the vehicle width direction outer flange portion 42b of the arch portion 42 of the reinforcement 40.
(See FIG. 5).

The arch portion 42 of the reinforcement 40
Is formed with a rectangular bent portion 43 which is bent in a direction opposite to the rectangular bent portion 51 of the front wheel house side member 50. Thus, the first closed section S2 is formed in the wheel arch portion Y by the rectangular bent portion 51 of the front wheel house side member 50 and the bent portion 43 of the arch portion 42 of the reinforcement 40. The reinforcement 4 is also provided on the arch portion 12 of the side body outer panel 10.
The rectangular bent portion 13 is formed outside the bent portion 43 of the 0 arch portion 42, and the bent portion 43 and the bent portion 13 form a second closed cross section S3.
The arch portion 42 of the reinforcement 40 includes:
Inside the bent portion 43, a sub-reinforcement (hinge inner reinforcement) 60 having a U-shaped cross section is provided.
Are joined by spot welding w (see FIGS. 5 and 7).

As shown in FIG. 6, the side sill portion Z includes a side sill portion 14 of the side body outer panel 10 and a side sill portion 71 of the center pillar lower panel 70. The upper and lower flange portions 14a and 14b and the upper and lower flange portions 71a and 71b of the side sill portion 71 of the center pillar lower panel 70 are connected to each other.
a, 71a, and the lower flange portions 14b, 71b are joined by spot welding w to form a closed cross section.

The side sill portion Z of the reinforcement 40 includes an upper and lower flange portion 44 at the side sill portion Z.
a, 44b to the upper side flange portions 14a, 71, respectively.
a and the lower flange portions 14b and 71b are spot welded and joined together. The side sill portion 44 of the reinforcement 40 is disposed on the front side of the side sill portion Z, and has two closed cross sections S4 and S5 (see FIG. 6).

According to the above configuration, the reinforcement 40 is provided with the pillar portions 41 for reinforcing the front pillar portions X.
And, since the arch portion 42 for reinforcing the wheel arch portion Y and the side sill portion 44 for reinforcing the side sill portion Z are integrally formed, the wheel arch portion Y and the wheel arch portion Y when an impact load from the front is applied to the vehicle body The rigidity of the side sill portion Z is improved (see FIGS. 2 and 3).

The wheel arch portion Y has a rectangular bent portion 51 of the front wheel house side member 50.
And the bent portion 43 of the arch portion 42 of the reinforcement 40 form a closed cross section S2 larger than the conventional structure, and the second closed cross section S3 is formed outside the closed cross section S2. From, the section modulus is improved,
The rigidity of the wheel arch portion Y is improved (see FIG. 5). In addition, since the sub reinforcement 60 having a U-shaped cross section is joined to the arch portion 42 of the reinforcement 40 by spot welding w inside the bent portion 43, the rigidity of the wheel arch portion Y is further improved. can do.

Closed cross sections S1, S2, S are formed over the front pillar portion X, the wheel arch portion Y, and the side sill portion Z.
Since S3, S4, and S5 are formed continuously, the rigidity against an impact load from the front of the vehicle body can be improved. These closed sections S1, S2, S3, S4, S5
Are formed continuously, so that the front pillar portion X,
The torsional rigidity of the wheel arch portion Y and the side sill portion Z is improved (see FIGS. 4, 5, and 6).

FIG. 8 shows another embodiment of the present invention. Instead of the reinforcement 40, a front pillar reinforcement 81 having an arch 81a and a side sill reinforcement 82 having an arch 82a are provided. And the arch portions 81a, 82a of each other
Are stacked and joined to improve the rigidity of the wheel arch portion Y. In this case, the sub reinforcement 60 can be omitted.

FIG. 9 shows another embodiment of the present invention. In place of the reinforcement 40, a front pillar reinforcement 83, a wheel arch 84, and a side sill reinforcement 85 are so-called tailored blanks. A thick plate is used for the arch portion 84. Thus, the rigidity of the wheel arch portion 84 can be further improved. Note that, also in this case, the sub reinforcement 60 can be omitted.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, the sub-reinforcement 60 may be formed in a closed section. Further, a round pipe can be used for the sub reinforcement 60. Needless to say, the present invention can be implemented by appropriately changing the gist of the present invention without changing the gist of the present invention.

[0025]

As described above, according to the vehicle body front structure according to the present invention, the following effects can be obtained.
2. A front pillar portion is formed by joining a rear end portion of a dash side panel to a front end portion of a side body outer panel, and is joined to a front end portion of the side body outer panel at a lower side of the front pillar portion. A front wheel house panel is provided, and the front lower end of these side body outer panels and the front wheel house panel form a wheel arch part in the vehicle body front part structure, integrated from the front pillar part to the wheel arch part and side sill part. Since the reinforcement is built in, the wheel arch portion and the side sill portion can be strengthened against a load applied from the front, so that deformation of the occupant space can be suppressed against an impact load from the front. In addition, lightening and cost reduction can be achieved by integration. In Claim 2, the reinforcement, the side body outer panel, and the front wheel house side member are installed in the wheel arch portion, and a closed cross section is formed. Therefore, a strong closed cross section is generated, thereby bending the wheel arch portion. The torsional rigidity is improved, and the deformation of the occupant space can be suppressed. 4. The second reinforcement according to claim 3, wherein the reinforcement and the front wheel house side member form a first closed cross section, and the reinforcement and a side body outer panel disposed outside the reinforcement are second. Since the closed cross section is formed, the section modulus is increased, and the rigidity of the wheel arch portion can be improved.
Additional components can be reinforced in the cross section. According to the fourth aspect, since the sub reinforcement is added inside the reinforcement, the rigidity of the wheel arch portion can be further improved. Also,
The bending and torsional rigidity of the wheel arch portion is improved, and deformation of the occupant space can be suppressed. The strength of the wheel arch can be adjusted by changing the plate thickness, the material, and the range to be added. In Claim 5, the side sill portion is constituted by a reinforcement, a side body outer panel, and a center pillar lower panel, and two closed cross sections are formed inside the side sill portion, so that a strong closed cross section is formed. Therefore, the bending and torsional rigidity of the side sill portion is improved, and the deformation of the occupant space can be suppressed. In claim 6, since each of the panels and the reinforcement is joined to each other at a place where two or three sheets overlap, it is possible to secure welding strength and eliminate welding defects.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle body conceptually showing an embodiment of a vehicle body front structure according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a perspective view showing an embodiment of a vehicle body front structure according to the present invention.

FIG. 4 is a sectional view taken along line CC of FIG. 3;

FIG. 5 is a sectional view taken along line DD of FIG. 3;

FIG. 6 is a sectional view taken along line EE of FIG. 3;

FIG. 7 is a conceptual diagram showing a structure of a sub reinforcement.

FIG. 8 is a conceptual diagram showing another embodiment of the present invention.

FIG. 9 is a conceptual diagram showing another embodiment of the present invention.

FIG. 10 is a conceptual diagram showing a conventional vehicle body front part.

FIG. 11 is a cross-sectional view showing a front wheel house panel portion below a conventional front pillar portion.

FIG. 12 is a conceptual diagram showing a structure of a conventional front wheel house panel portion.

FIG. 13 is a conceptual diagram showing a deformed state of a front wheel house panel portion below a conventional front pillar portion when a load is applied from the front.

FIG. 14 is a perspective view showing a front wheel house panel portion on a lower side of a conventional front pillar portion.

FIG. 15 is a sectional view taken along line FF of FIG. 14;

FIG. 16 is a sectional view taken along line GG of FIG. 14;

FIG. 17 is a sectional view taken along line HH of FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Side body outer panel 11 Pillar part 12 Arch part 13 Bend part 20 Dash side panel 21 Rear end part 30 Front wheel house panel 32 Wheel house part 40 Reinforcement 41 Pillar part 42 Arch part 43 Bend part 44 Side sill part 50 Front wheel house Side member 51 Bending part 60 Sub reinforcement 70 Center pillar lower panel A Body front part B Door opening X Front pillar part Y Wheel arch part Z Side sill part S1, S2, S3, S4, S5 Closed cross section

Claims (6)

[Claims] 1. A front pillar portion is formed by joining a rear end portion of a dash side panel to a front end portion of a side body outer panel, and is joined to a front end portion of the side body outer panel below the front pillar portion. A front wheel house panel is provided, and the front lower end of these side body outer panels and the front wheel house panel form a wheel arch part in the vehicle body front part structure, integrated from the front pillar part to the wheel arch part and side sill part. The front structure of the vehicle is characterized by a built-in reinforcement. 2. The vehicle body front structure according to claim 1, wherein a reinforcement, a side body outer panel, and a front wheel house side member are installed in the wheel arch portion, and a closed cross section is formed therebetween. 3. A first closed section is formed by the reinforcement and the front wheel house side member. A second closed body is formed by the reinforcement and a side body outer panel disposed outside the reinforcement. 3. The vehicle body front structure according to claim 2, wherein a closed cross section is formed. 4. The vehicle body front structure according to claim 3, wherein a sub-reinforcement is added inside the reinforcement. 5. The side sill portion according to claim 1, wherein the side sill portion includes a reinforcement, a side body outer panel, and a center pillar lower panel, and two closed cross sections are formed inside the side sill portion. Body front structure. 6. The vehicle body front structure according to claim 1, wherein the panels and reinforcement are joined to each other at a position where two or three sheets overlap. .