JP2000255451A - Front car body structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the front car body structure of an automobile, capable of improving the rigidity of a car body front side face. SOLUTION: In an automotive front car body structure having front pillar and side sill portions reinforced by reinforcing members, in a connecting part between the lower end of the front pillar portion and the front end of the side sill portion, an auxiliary reinforcing member 17 is incorporated to plot the internal space of the connecting part in a car width direction together with reinforcing members 13 and 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front body structure of a motor vehicle capable of improving the rigidity of a lower portion of a front pillar in a four-wheeled vehicle.

[0002]

2. Description of the Related Art FIG. 19 shows a front side of a vehicle body at a rear side of a wheel house. This body front side 100
The impact load from the front that is applied to the tire 1
It will be transmitted through 01. This car front side 1
20 includes a front pillar portion 102 and a side sill portion 103, as shown in FIGS. 20 and 21, and a door mounting opening portion 104 is formed. The joint between the front pillar portion 102 and the side sill portion 103 is connected to a dash panel 105 or a dash lower cross member 106.
, Dash side panel 107 or side sill inner panel 108, front pillar hinge reinforcement 109 or side sill strength 11
0 and four types of side body outer panels 111 are joined together.

At the joint between the lower end of the front pillar 102 and the front end of the side sill, the lower end of the front pillar hinge reinforcement 109 and the front end of the side sill strength 110 are joined to form the front pillar 1.
02 The lower side is reinforced.

[0004]

However, if an excessive impact load is applied to the front end portion of the front pillar portion 102 via a tire or the like, the upper edge of the side silence length 110 is opened below the front pillar portion 102. The upper part of 110 has an open sectional structure. As a result, there is a possibility that a deformation of the side body outer panel 111 of the front pillar portion 102 with respect to an impact load from the front may cause torsional deformation due to bending buckling or moment at the peripheral portion of the front side surface 100 of the vehicle body.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a vehicle front body structure capable of improving the rigidity of a lower portion of a front pillar portion.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a front body structure of an automobile in which a front pillar portion and a side sill portion are reinforced by a reinforcing member. An auxiliary reinforcing member that partitions an internal space of the connecting portion in the vehicle width direction together with the reinforcing member is provided in a connecting portion with the front end portion. Further, in a front body structure of an automobile in which a reinforcing member provided in a front pillar portion is joined to a reinforcing member provided in a side sill portion, and a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion is reinforced. An auxiliary reinforcing member which partitions an internal space of the connecting portion in the vehicle width direction together with the reinforcing member at a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion; Is disposed so as to correspond to the joint between the two reinforcing members. Further, in a vehicle front body structure in which a reinforcing member provided in a front pillar portion is joined to a reinforcing member provided in a side sill portion, and a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion is reinforced. An auxiliary reinforcing member which partitions an internal space of the connecting portion in the vehicle width direction together with the reinforcing member at a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion; On the inner wall surface of the side sill portion. The auxiliary reinforcing member may be provided with a bead on a wall surface, and the bead may be provided with a protruding portion toward the outside or inside of the vehicle body.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the body of a monocoque type four-door car, and FIG.
3 and 4 are conceptual diagrams showing a side body of the automobile of FIG.
Is an exploded perspective view of FIG. 2, and FIGS. 5 to 7 are sectional views of FIG.

1 to 7, in the case of a four-door vehicle, door openings 5, 6 for assembling a front door 3, a rear door 4, and the like are provided in a side body 2 constituting a side surface of the vehicle body 1. On both sides of the door openings 5, 6, front pillars 7, which support the door openings 5, 6,
The center pillar 8 or the rear pillar 9 is usually
Is provided. Side sill portions 10 and 11 are formed below the door openings 5 and 6 to reinforce the door openings 5 and 6.

The structure of the front pillar portion 7 and the side sill portion 10 provided with the front door 3 of the side body 2 is shown by disassembling the front end of the side body 2 and viewing from the indoor side according to FIGS. explain. The front pillar portion 7 and the side sill portion 10 of the side body 2 include an outermost side body outer panel 12, a front pillar hinge reinforcement (reinforcing member) 13 for reinforcing the front pillar portion 12A of the side body outer panel 12, and the side body. The outer panel 12 includes a cross section for reinforcing a side sill portion 12B of the outer panel 12, a substantially U-shaped side sill strength 14 (reinforcing member), an innermost side sill inner panel 15, a dash side panel 16, and the like. At a position corresponding to the joint X between the lower end 13B of the front pillar hinge reinforcement 13 and the front end 14A of the side sill strength 14, an auxiliary reinforcing member 17 is provided to be joined to the front end 14A of the side sill strength 14. . The auxiliary reinforcing member 17 is provided so as to partition the lower end of the front pillar 7 in the vehicle width direction. As shown in FIGS. 5 and 6, the auxiliary reinforcing member 17 is joined so as to face the side silence length 14, and is disposed so as to be partitioned with the side silence length 14 in the vehicle width direction in a longitudinal sectional view. ing. As a result, a closed cross-sectional S structure is formed by the side sill strength 14 and the auxiliary reinforcing member 17 when viewed from the front side of the vehicle body, with the lower end portion of the front pillar portion 7 as a vertical cross section. The side sill inner panel 15 and the dash side panel 16 are formed by a front end portion 15A of the side sill inner panel 15 and the dash side panel 16.
Are joined together with their lower ends 16B.

The lower end portion 13B of the front pillar hinge reinforcement 13 and the side sill strength 1
4, the front end 14A is spot-weld w as shown in FIG.
1 and so on. An auxiliary reinforcing member 17 is joined to the front end 14A of the side sill strength 14 at a position corresponding to the joint X between the lower end 13B of the front pillar hinge reinforcement 13 and the front end 14A of the side sill strength 14. As shown in FIGS. 8 and 9, the auxiliary reinforcing member 17 is formed of a metal panel 19 having a stepped portion 18 formed on an upper end 17a by press working.

The auxiliary reinforcing member 17 has an upper end portion 17a at the front pillar portion 7 at a side silence length 14a.
The upper end portion 17a of the side sill portion 10 is connected to the side body outer panel 12 and the side sill inner panel 15 by spot welding w2 or the like.
Are spot-welded w3 together with the upper flange portion 14a of the side sill strength 14 so as to be sandwiched between the flange portions 12a and 15a (see FIGS. 5 and 6). The lower end portion 17b of the auxiliary reinforcing member 17 is spot-welded w4 together with the lower flange portion 14b of the side sill length 14 so as to be sandwiched between the flange portions 12b and 15b of the side body outer panel 12 and the side sill inner panel 15 (FIG. 5, 6). The front end portion 17c of the auxiliary reinforcing member 17 is attached to the front flange portion 14c of the side sill strength 14 by the front flange portion 13c of the front pillar hinge reinforcement 13.
are joined together with c by spot welding w4.
The front flange portion 13c of the front pillar hinge reinforcement 13 is provided with flange portions 12c, 15c of the side body outer panel 12 and the side sill inner panel 15.
(See FIG. 7).

After the front pillar hinge reinforcement 13 and the side sill strength 14 are integrally assembled, they are joined (outer comp) to the side body outer panel 12 and assembled. The side sill inner panel 15 and the dash side panel 16 are attached thereto. And the front part of the side body 2 is assembled. The front pillar portion 7 and the side sill portion 10 of the side body 2 have a closed cross section S formed by the side sill length 14 and the auxiliary reinforcing member 17.

According to the above configuration, when an impact load is applied to the front pillar portion 7 and the side sill portion 10 of the side body 2 from the front by a tire or the like, the side body outer panel forming the outer surfaces of the front pillar portion 7 and the side sill portion 10 is formed. The impact load is transmitted to 12 and the side sill inner panel 15. Inside the side body outer panel 12 and the side sill inner panel 15, a closed cross section S is formed by a side sill length 14 and an auxiliary reinforcing member 17. Is joined to disperse and absorb the stress to the rear of the vehicle body. Therefore, rigidity can be improved by preventing local bending buckling or torsional deformation. The auxiliary reinforcing member 17
As shown in FIG. 10 and FIG.
By forming the bead 20 in the longitudinal direction of the vehicle body 9, the rigidity of the side body 2 can be improved. The width and the number of the beads 20 can be appropriately selected. The direction of the bead 20 may be either vertical or horizontal, but a bead in the vehicle longitudinal direction is effective for a load from the front of the vehicle.

FIGS. 12 and 13 show a modified example of the auxiliary reinforcing member 21. In this case, the auxiliary reinforcing member 21 has a length L in the longitudinal direction of the vehicle body and a side sill for lowering the getting on and off. The rear end T
It extends to a shorter position. The one shown in the drawing extends to a substantially intermediate position between the shape change portion O and the rear end portion T. Thereby, the portion of the closed cross section S partitioned in the vehicle width direction can be lengthened, so that
The rigidity in the longitudinal direction of the vehicle body can be improved. Also in this case, the rigidity can be improved by forming the beads along the longitudinal direction of the vehicle body.

FIGS. 14 to 16 show another embodiment of the present invention. The same parts as those in FIGS. 4 to 6 are denoted by the same reference numerals, and their description is omitted. In this case, as the auxiliary reinforcing member 22, a bulging portion 23 protruding toward the outside of the vehicle body is formed to improve rigidity. Auxiliary reinforcing member 22
Is formed by spot welding the flange portion 24 formed on the periphery to the side sill inner panel 15 so as to correspond to the junction between the side sill inner panel 15 and the dash side panel 16 to form a closed cross section S partitioned in the vehicle width direction. are doing. In this case, in the front pillar portion 7, the upper flange portion 22a is joined to the side sill inner panel 15 and the dash side panel 16, and the lower flange portion 22b
Are joined to the side sill inner panel 15, the side sill strength 14, and the side body outer panel 12. In the side sill portion 10, the upper and lower flange portions 22 are provided.
Both a and 22b are joined to the flanges of the side sill inner panel 15, the side sill strength 14, and the side body outer panel 12. by this,
By attaching the auxiliary reinforcing member 22 to the side sill inner panel 15 side, the same effect as in the above embodiment can be obtained.

FIGS. 17 and 18 show a modification of the embodiment shown in FIGS. In this case, the flange section 26 around the auxiliary reinforcing member 25 is joined to the inner surface side of the side sill strength 14 to form a closed section S partitioned in the vehicle width direction. Thereby, the number of welds on the lower side of the side sill portion 10 and on the upper side of the side sill portion 10 after the front pillar portion 7 becomes a three-piece structure of the side sill inner panel 15, the side sill strength 14, and the side body outer panel 12, which is effective. Can be spot welded. Therefore, weldability can be improved.

According to the above configuration, when an impact from the front of the vehicle body is applied to the front side surface of the vehicle body, an impact load in the arrow direction is applied to the front pillar portion 7 and the tip of the side sill portion 10. When the pillars of the side body outer panel 12 and the side sill inner panel 15 are deformed rearward by the load, the side sill strength 14 and the auxiliary reinforcing member 17 (21, 21) provided inside the pillars are provided.
25) The deformation is suppressed by the cross section S defined in the vehicle width direction or by the closed cross section S defined in the vehicle width direction of the side sill inner panel 15 and the auxiliary reinforcing member 22. Thus, deformation of the front side surface of the vehicle body can be prevented to a minimum.

The present invention is not limited to the above-described embodiment, but includes, for example, auxiliary reinforcing members 17, 21, and 2.
The size, material, or thickness of 2, 25 can be set as appropriate, and the size of the closed cross section S defined in the vehicle width direction can also be set as appropriate.
In addition, the auxiliary reinforcing members 17, 21, 22, 25 may be used in the case where one or a plurality of beads are vertically or
It can be provided in the lateral direction (vehicle longitudinal direction). Further, the rigidity of the auxiliary reinforcing members 17, 21, 22, 25 is further improved by joining the rear end portions thereof to a reinforcement or the like to form a closed complete cross-sectional structure. Can be. Needless to say, the present invention can be appropriately modified and implemented without departing from the scope of the present invention.

[0019]

As described above, according to the front vehicle body structure of the automobile according to the present invention, the following effects can be obtained. In a vehicle front body structure in which a front pillar portion and a side sill portion are reinforced by a reinforcing member, an internal space of the connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion is provided by the reinforcing member. In addition, since the auxiliary reinforcing member partitioning in the vehicle width direction is provided, the rigidity of the front end portion of the front pillar portion can be improved. The present invention also relates to a front part of an automobile in which a reinforcing member provided in a front pillar portion is joined to a reinforcing member provided in a side sill portion to reinforce a joint between a lower end portion of the front pillar portion and a front end portion of the side sill portion. In the vehicle body structure, an auxiliary reinforcing member that partitions the internal space of the connecting portion in the vehicle width direction together with the reinforcing member is provided at a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion, Since the auxiliary reinforcing member is disposed so as to correspond to the joint between the two reinforcing members, rigidity can be improved, and deformation of the front pillar portion can be suppressed to a minimum in response to an impact from the front side of the vehicle body. . In the vehicle front body structure in which the reinforcing member provided in the front pillar portion is joined to the reinforcing member provided in the side sill portion, and the joint between the lower end portion of the front pillar portion and the front end portion of the side sill portion is reinforced, At the joint between the lower end of the front pillar portion and the front end of the side sill portion, an auxiliary reinforcing member for partitioning the internal space of the connecting portion in the vehicle width direction together with the reinforcing member is provided. Since it is joined to the inner wall surface of the side sill portion, the rigidity can be improved, and the deformation of the front pillar portion can be suppressed to a minimum in response to an impact from the front side of the vehicle body. Furthermore, since the auxiliary reinforcing member extends along the side sill reinforcement, the deformation between the side body outer panel and the side sill inner panel against impact from the front side of the vehicle body is suppressed, minimizing the deformation of the front pillar. Can be suppressed. Local bending buckling and torsional deformation can be reduced. Further, by providing a reinforcing bead on the auxiliary reinforcing member, the rigidity can be improved. Moreover, the rigidity can be further improved by projecting the auxiliary reinforcing member toward the indoor side or the outdoor side.

[Brief description of the drawings]

FIG. 1 is a side view showing a vehicle body of an automobile.

FIG. 2 is a side view of a side body showing an embodiment of a front vehicle body structure of an automobile according to the present invention.

FIG. 3 is an exploded perspective view of the side body of FIG. 2;

FIG. 4 is an exploded perspective view showing a state where a part of FIG. 3 is assembled.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a sectional view taken along line BB of FIG. 2;

FIG. 7 is a sectional view taken along line CC of FIG. 2;

FIG. 8 is a perspective view showing an embodiment of a reinforcing member of the present invention.

FIG. 9 is a sectional view taken along line DD of FIG. 8;

FIG. 10 is a perspective view showing another embodiment of the reinforcing member according to the present invention.

FIG. 11 is a sectional view taken along line EE of FIG. 10;

FIG. 12 is a side view of a side body showing another embodiment of the front body structure of the automobile according to the present invention.

FIG. 13 is a side view showing another embodiment of the reinforcing member according to the present invention.

FIG. 14 is an exploded perspective view of a side body showing another embodiment of the present invention.

15 is a cross-sectional view showing a vertical cross-sectional structure of a front pillar portion of the vehicle body front structure shown in FIG.

16 is a cross-sectional view showing a vertical cross-sectional structure of a side sill portion of the vehicle body front structure shown in FIG.

FIG. 17 is a sectional view showing a modification of FIG.

FIG. 18 is a sectional view showing a modification of FIG.

FIG. 19 is a conceptual diagram showing a conventional vehicle body front structure.

20 is a sectional view taken along line FF of FIG. 19;

FIG. 21 is a sectional view taken along line GG of FIG. 19;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Side body 3 Front door 4 Rear door 5 Door opening 6 Door opening 7 Front pillar 8 Center pillar 9 Rear pillar 10 Side sill 11 Side sill 12 Side body outer panel 13 Front pillar hinge reinforcement 14 Side sill inner panel Reference Signs List 15 side sill strength 16 dash side panel 17 auxiliary reinforcing member 18 stepped portion 19 metal panel 20 bead 21 auxiliary reinforcing member 22 auxiliary reinforcing member 23 bulging portion 24 flange portion 25 auxiliary reinforcing member 26 flange portion S is partitioned in the vehicle width direction. Closed cross section

Claims (6)

[Claims] 1. A front body structure of an automobile in which a front pillar portion and a side sill portion are reinforced by a reinforcing member, wherein a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion has an internal space of the connecting portion. A front body structure of an automobile, wherein an auxiliary reinforcing member for partitioning the vehicle in the vehicle width direction is provided together with the reinforcing member. 2. A front portion of an automobile in which a reinforcing member provided in a front pillar portion is joined to a reinforcing member provided in a side sill portion to reinforce a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion. In the vehicle body structure, an auxiliary reinforcing member that partitions the internal space of the connecting portion in the vehicle width direction together with the reinforcing member is provided at a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion, A front vehicle body structure for an automobile, wherein an auxiliary reinforcing member is disposed so as to correspond to a joint portion between the two reinforcing members. 3. A front portion of a vehicle in which a reinforcing member provided in a front pillar portion is joined to a reinforcing member provided in a side sill portion to reinforce a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion. In the vehicle body structure, an auxiliary reinforcing member that partitions the internal space of the connecting portion in the vehicle width direction together with the reinforcing member is provided at a connecting portion between a lower end portion of the front pillar portion and a front end portion of the side sill portion, A front body structure of an automobile, wherein an auxiliary reinforcing member is joined to an inner wall surface of the side sill portion. 4. The front body structure of a vehicle according to claim 1, wherein the auxiliary reinforcing member extends along the front-rear direction of the vehicle body. 5. The front body structure of an automobile according to claim 1, wherein a reinforcing bead is provided on the auxiliary reinforcing member. 6. The front body structure of a vehicle according to claim 1, wherein the auxiliary reinforcing member protrudes toward the indoor side or the outdoor side.