JP3951742B2 - Body structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body structure, and more particularly to a vehicle body structure of a vehicle such as an automobile in which a lower part of a pillar is coupled to an upper part of a rocker.
[0002]
[Prior art]
Conventionally, an example of a vehicle body structure of a vehicle such as an automobile in which a lower portion of a pillar is coupled to an upper portion of a rocker is disclosed in Japanese Patent Laid-Open No. 10-7021.
[0003]
As shown in FIG. 6, in this vehicle body structure, a reinforcement 106 is disposed in a joint portion between a pillar 100 and a rocker (also referred to as a side sill) 102. Further, the connecting portion between the pillar portion 108 and the rocker portion 110 of the reinforcement 106 is a flat portion 108C that is flush with the side wall 108A of the pillar portion 108, and straddles the front and rear side portions of the flat portion 108C and the rocker inner 112. By arranging the braces 114 and 116 as reinforcing members, the flat portion 108C and the braces 114 and 116 function as rib walls in the closed cross section of the rocker 102, thereby increasing the rigidity of the rocker 102 and at the time of a side collision. The pillar 100 is prevented from being deformed to the side of the passenger compartment.
[0004]
[Problems to be solved by the invention]
However, in this vehicle body structure, an opening 120 is formed in the upper portion of the rocker 102 at the joint portion between the pillar 100 and the rocker 102, and the strength of the rocker 102 is not sufficient. In order to improve this, it is desired to form the upper wall portion of the rocker 100 at this portion, that is, the joint portion between the pillar 100 and the rocker 102 to form a closed cross-sectional structure, but the upper wall portion of the rocker 100 is formed at this portion. If the closed cross-section structure is used, the braces 114 and 116 as the reinforcing members cannot be welded within the closed cross-section of the rocker 102.
[0005]
In consideration of the above facts, the present invention has an object to obtain a vehicle body structure in which an upper wall portion is formed in a rocker at a joint portion between a pillar and a rocker to form a closed cross-sectional structure and a reinforcing member can be welded in the closed cross-section of the rocker. is there.
[0006]
[Means for Solving the Problems]
The vehicle body structure of the present invention according to claim 1 is a rocker having a closed cross-sectional structure and extending in the vehicle front-rear direction,
A pillar having a lower part coupled to the upper part of the rocker;
A front wall portion fixed by one-side welding to the lower portion of the pillar inside the rocker, and closing a substantially entire area of the closed cross section of the rocker on a substantially extended line of the front wall portion of the pillar; A reinforcing member having a rear wall that closes substantially the entire area of the closed cross-section of the rocker on a substantially extended line of the wall;
The reinforcing member is U-shaped with the opening facing downward in a side view, and the upper wall portion of the reinforcing member and the upper wall portion of the rocker are a part of the coupling portion between the pillar and the rocker. It is characterized by a double structure over almost the entire area .
[0007]
Accordingly, the rocker and the pillar can be joined at the joint portion by forming the upper wall in the rocker to have a closed cross-sectional structure, and the reinforcing member can be fixed by welding in the rocker having the closed cross-sectional structure by one-side welding. Further, the front wall portion of the reinforcing member closes substantially the entire area of the closed cross section of the rocker on the substantially extended line of the front wall portion of the pillar, and the rear wall portion of the reinforcing member is on the substantially extended line of the rear wall portion of the pillar. Since the entire area of the closed cross section of the rocker is closed, the structure can be like a structure in which pillars are skewered into the rocker. As a result, the upper wall portion can be formed in the rocker at the joint portion between the pillar and the rocker to form a closed cross-sectional structure, and the reinforcing member can be welded in the closed cross section of the rocker. In addition, the reinforcing member has a U-shape with the opening facing downward in a side view, and the upper wall portion of the reinforcing member and the upper wall portion of the rocker have a double structure over substantially the entire area where the pillar and the rocker are joined. Therefore, it is possible to improve the strength and rigidity in the vicinity of the coupling portion between the pillar and the rocker, and to effectively reinforce the upper surface of the rocker that contributes to the strength at the time of a vehicle side collision.
[0010]
The present invention according to claim 2, Te bodywork smell of claim 1, the prior SL reinforcing member is on one side welded to the vehicle transverse direction outer side wall and the vehicle width direction inner side wall portion of the rocker It is characterized by.
[0011]
Therefore, in addition to the content described in claim 1, the strength of the joint between the pillar and the rocker can be further improved by welding the reinforcing member to the outer wall portion in the vehicle width direction and the inner wall portion in the vehicle width direction of the rocker. At the same time, it is possible to suppress the collapse of the cross section of the rocker.
[0012]
According to a third aspect of the present invention, in the vehicle body structure according to the first aspect, the reinforcing member is welded on one side to an upper wall portion of the rocker.
[0013]
Therefore, in addition to the contents of the first aspect, the strength and rigidity of the joint between the pillar and the rocker can be further improved by welding the reinforcing member to the upper wall of the rocker on one side.
[0014]
The invention according to claim 4 is the vehicle body structure according to any one of claims 1 to 3 , wherein the one-side welding is laser welding.
[0015]
Therefore, in addition to the content described in any one of claims 1 to 3, the reinforcing member can be easily welded into a rocker having a closed cross-sectional structure by using laser welding.
[0016]
Embodiment
An embodiment of a vehicle body structure according to the present invention will be described with reference to FIGS.
[0017]
In the figure, the arrow FR indicates the vehicle body front direction, the arrow IN indicates the vehicle width inside direction, and the arrow UP indicates the vehicle body upward direction.
[0018]
As shown in FIG. 1, a rocker 10 is disposed along the vehicle front-rear direction at the vehicle width direction outer lower portion of the vehicle body of this embodiment. The rocker 10 is disposed on the outer side in the vehicle width direction (not shown in FIG. 1, refer to FIG. 4), and the rocker constituting the outer side in the vehicle width direction of the rocker 10 on the inner side in the vehicle width direction of the outer outer 11. The outer reinforcement 12 and the rocker inner 14 constituting the inner side of the rocker 10 in the vehicle width direction are provided.
[0019]
The cross-sectional shape of the rocker outer reinforcement 12 viewed from the vehicle front-rear direction is a U-shape with the opening facing inward in the vehicle width direction. A flange 12B is formed at an inner end in the vehicle width direction of the upper wall portion 12A of the rocker outer reinforcement 12 at the inner end in the vehicle width direction of the lower wall portion 12C of the lower wall portion 12C of the rocker outer reinforcement 12. Is formed with a flange 12D downward.
[0020]
On the other hand, the cross-sectional shape of the rocker inner 14 viewed from the vehicle front-rear direction is a U-shape with the opening facing outward in the vehicle width direction. A flange 14B is formed upward at the outer end in the vehicle width direction of the upper wall portion 14A of the rocker inner 14 and downward at the outer end in the vehicle width direction of the lower wall portion 14C of the rocker inner 14. A flange 14D is formed.
[0021]
The flange 12B and the flange 12D of the rocker outer reinforcement 12 are welded to the flange 14B and the flange 14D of the rocker inner 14, respectively. ing.
[0022]
A lower portion of a center pillar (B pillar) 20 is coupled to a center portion in the vehicle longitudinal direction at the upper portion of the rocker 10.
[0023]
The center pillar 20 is disposed on the outer side in the vehicle width direction (not shown in FIG. 1, refer to FIG. 4), and constitutes the outer side in the vehicle width direction of the center pillar 20 on the inner side in the vehicle width direction of the outer cylinder 11. The center pillar outer reinforcement 22 and the center pillar inner 24 constituting the inner side in the vehicle width direction of the center pillar 20 are provided.
[0024]
The cross-sectional shape of the center pillar outer reinforcement 22 viewed from the vehicle vertical direction is a U-shape with the opening facing inward in the vehicle width direction. A flange 22B is formed on the inner end in the vehicle width direction of the front wall portion 22A of the center pillar outer reinforcement 22, and an inner end in the vehicle width direction of the rear wall portion 22C of the center pillar outer reinforcement 22 is formed. The part is formed with a flange 22D toward the rear.
[0025]
On the other hand, the cross-sectional shape of the center pillar inner 24 viewed from the vehicle front-rear direction is a straight line extending in the front-rear direction.
[0026]
The flange 22B and the flange 22D of the center pillar outer reinforcement 22 are welded to the front edge 24A and the rear edge 24B of the center pillar inner 24, respectively, and the center pillar outer reinforcement 22 and the center pillar inner 24 are vehicles. A closed section 26 extending in the vertical direction is formed.
[0027]
As shown in FIG. 4, the lower end edge portion 22F of the vertical wall portion 22E of the center pillar outer reinforcement 22 is welded to the upper portion 12F of the vertical wall portion 12E of the rocker outer reinforcement 12. The lower end edge 24C of the center pillar inner 24 is welded between the flange 12B of the rocker outer reinforcement 12 and the flange 14B of the rocker inner 14.
[0028]
As shown in FIG. 1, a bracket serving as a reinforcing member is provided at a portion that is a lower extension line of the center pillar outer reinforcement 22 in the closed cross section 16 of the rocker 10, that is, a portion that is below the center pillar 20. 30 is disposed.
[0029]
As shown in FIG. 2, the bracket 30 has a U shape with an opening facing downward in a side view. From the front end portion of the upper wall portion 30A of the bracket 30, a front wall portion 30B that is inclined obliquely downwardly forward is formed, and a flange 30C is formed forwardly at the lower end portion of the front wall portion 30B. Yes. On the other hand, from the rear end portion of the upper wall portion 30A of the bracket 30, a rear wall portion 30D that is inclined rearward and downward is formed, and a flange 30E is provided at the lower end portion of the rear wall portion 30D toward the rear. Is formed.
[0030]
In addition, a flange 30F is formed on the outer end in the vehicle width direction of the upper wall portion 30A, the front wall portion 30B, and the rear wall portion 30D of the bracket 30 toward the inside of the U-shape. A flange 30G is formed toward the inner side of the U-shape at the inner ends in the vehicle width direction of the portion 30A, the front wall portion 30B, and the rear wall portion 30D.
[0031]
As shown in FIG. 3, a flange 22 </ b> G is formed at the lower end portion of the front wall portion 22 </ b> A of the center pillar outer reinforcement 22 toward the front, and the flange 22 </ b> G is an upper wall portion of the rocker outer reinforcement 12. It is welded to the upper surface of 12A. Further, a flange 22H is formed rearwardly at the lower end portion of the rear wall portion 22C of the center pillar outer reinforcement 22, and this flange 22H is welded to the upper surface of the upper wall portion 12A of the rocker outer reinforcement 12. Has been.
[0032]
The front wall portion 30B of the bracket 30 is disposed on a substantially extended line of the front wall portion 22A of the center pillar outer reinforcement 22, and the rear wall portion 30D of the bracket 30 is a rear wall portion of the center pillar outer reinforcement 22. It is disposed on a substantially extended line of 22C. Therefore, the pillar 20 is skewered to the rocker 10.
[0033]
As shown in FIG. 4, the upper wall portion 30 </ b> A of the bracket 30 is formed on each lower surface of the upper wall portion 12 </ b> A of the rocker outer reinforcement 12 and the upper wall portion 14 </ b> A of the rocker inner 14. Continuous welding is performed by laser welding as one-side welding (welded portion P1).
[0034]
As shown in FIG. 1, the welded portion P1 between the upper wall portion 30A of the bracket 30 and the upper wall portion 10A of the rocker 10 is a rectangular continuous weld along the outer peripheral portion of the upper wall portion 30A of the bracket 30. Yes.
[0035]
As shown in FIG. 4, the flange 30 </ b> F of the bracket 30 is continuously welded by laser welding as one-side welding to the vertical wall portion 12 </ b> E of the rocker outer reinforcement 12 constituting the vehicle width direction outer side wall portion 10 </ b> B of the rocker 10. (Welded part P2). Further, the flange 30G of the bracket 30 is continuously welded by laser welding as one-side welding to the vertical wall portion 14E of the rocker inner 14 that substantially constitutes the vehicle width direction inner side wall portion 10C of the rocker 10 (welded portion P3). .
[0036]
As shown in FIG. 1, a welded portion P2 between the flange 30F of the bracket 30 and the outer wall portion 10B in the vehicle width direction of the rocker 10 is a U-shaped continuous weld along the flange 30F of the bracket 30. The welded part P3 between the 30 flanges 30G and the rocker 10 inner wall part 10C in the vehicle width direction is U-shaped continuous welding along the flange 30G of the bracket 30.
[0037]
As shown in FIG. 3, the flange 30 </ b> C of the bracket 30 is welded to each upper surface of the lower wall portion 12 </ b> C of the rocker outer reinforcement 12 constituting the lower wall portion 10 </ b> D of the rocker 10 and the lower wall portion 14 </ b> B of the rocker inner 14. Are continuously welded by laser welding (welded portion P4). Further, the flange 30E of the bracket 30 is continuously formed by laser welding as one-side welding on each upper surface of the lower wall portion 12C of the rocker outer reinforcement 12 constituting the lower wall portion 10D of the rocker 10 and the lower wall portion 14B of the rocker inner 14. It is welded (welded part P5).
[0038]
As shown in FIG. 1, the welded portion P4 between the flange 30C of the bracket 30 and the lower wall portion 10D of the rocker 10 is a linear continuous weld along the flange 30C of the bracket 30, and the flange 30E of the bracket 30 is shown. The welded portion P5 between the rocker 10 and the lower wall portion 10D of the rocker 10 is a linear continuous weld along the flange 30E of the bracket 30.
[0039]
Next, the operation of this embodiment will be described.
[0040]
According to the vehicle body structure of the present embodiment, the upper wall 10A can be formed on the rocker 10 even at the joint portion between the rocker 10 and the pillar 20, and a closed cross-sectional structure can be obtained by one-side welding by laser welding. A bracket 30 as a reinforcing member can be fixed in the rocker 10 formed. Further, the front wall portion 30B and the rear wall portion 30D of the bracket 30 close the closed cross section 16 of the rocker 10 so that the pillar 20 is skewed into the rocker 10.
[0041]
As a result, the upper wall portion 10 </ b> A is formed on the rocker 10 at the joint portion between the pillar 20 and the rocker 10 to form a closed cross-sectional structure, and the bracket 30 can be welded into the closed cross-sectional portion 16 of the rocker 10. For this reason, the strength of the rocker 10 can be improved, and the strength and rigidity of the coupling portion between the pillar 20 and the rocker 10 can be improved.
[0042]
In the present embodiment, the bracket 30 is formed in a U shape with the opening facing downward in a side view, so that the rocker is locked by the upper wall portion 30A that connects the front wall portion 30B and the rear wall portion 30D of the bracket 30. 10 can be further improved, and the strength and rigidity of the joint between the pillar 20 and the rocker 10 can be further improved.
[0043]
Moreover, in this embodiment, since the upper wall part 30A of the bracket 30 was welded to the upper wall part 10A of the rocker 10 on one side (welded part P1), this part has a double structure. For this reason, the strength and rigidity in the vicinity of the joint portion between the pillar 20 and the rocker 10 can be further improved, and the upper surface of the rocker 10 having a high contribution to strength at the time of a vehicle side collision can be effectively reinforced.
[0044]
In the present embodiment, the flanges 30F and 30G of the bracket 30 are welded to the vehicle width direction outer side wall portion 10B and the vehicle width direction inner side wall portion 10C of the rocker 10 on one side (welded portions P2 and 3). The joint portion strength of the rocker 10 can be further improved, and the rocker's cross-sectional deformation can be suppressed.
[0045]
Further, in the present embodiment, the bracket 30 can be easily welded into the closed cross section 16 of the rocker 10 by using laser welding.
[0046]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is obvious to those skilled in the art. For example, in the above embodiment, as shown in FIG. 3, the front wall portion 30B of the bracket 30 is arranged on a substantially extended line of the front wall portion 22A of the center pillar outer reinforcement 22. The rear wall portion 30D of the bracket 30 is disposed on a substantially extended line of the rear wall portion 22C of the center pillar outer reinforcement 22, but instead of this, as shown in FIG. The upper end 30H of the portion 30B is shifted in the vehicle front-rear direction within the range L1 of the flange 22G, and the upper end 30J of the rear wall portion 30D of the bracket 30 is disposed on the flange 22H. It may be arranged shifted in the vehicle longitudinal direction in 囲内 L2.
[0047]
In the present embodiment, laser welding is used as one-side welding, but each welding portion may be welded on one side by another welding method instead of laser welding.
[0048]
【The invention's effect】
The vehicle body structure according to the first aspect of the present invention is a rocker having a closed cross-sectional structure and extending in the vehicle front-rear direction, a pillar having a lower part coupled to the upper part of the rocker, and one-side welding to a part below the pillar inside the rocker. The front wall portion that is fixed by substantially blocking the entire area of the closed section of the rocker on the substantially extended line of the front wall of the pillar, and the entire area of the closed section of the rocker is closed on the substantially extending line of the rear wall of the pillar. A reinforcing wall having a rear wall portion, and the reinforcing member is U-shaped with the opening facing downward in a side view, and the upper wall portion of the reinforcing member and the upper wall portion of the rocker are pillars The rocker has a double structure over the entire area of the joint between the rocker and the rocker. It has an excellent effect that it can be welded. Moreover, it has the outstanding effect that the upper surface of a rocker with high contribution of strength can be effectively reinforced when a vehicle side collision occurs.
[0050]
The present invention described in claim 2, since Te bodywork smell of claim 1, reinforcement member is one side welded to the vehicle transverse direction outer side wall and the vehicle width direction inner side wall portion of the rocker, wherein In addition to the effect described in Item 1, the joint portion strength between the pillar and the rocker can be further improved, and the rocker can be prevented from being broken in cross section.
[0051]
According to the third aspect of the present invention, in the vehicle body structure according to the first aspect, since the reinforcing member is welded to the upper wall portion of the rocker on one side, the strength of the rocker is added to the effect of the first aspect. Can be further improved, and the strength and rigidity of the joint between the pillar and the rocker can be further improved.
[0052]
The invention according to claim 4 is the vehicle body structure according to any one of claims 1 to 3, wherein the one-side welding is laser welding, so the effect according to any one of claims 1 to 3 is provided. In addition, the reinforcing member can be easily welded into a rocker having a closed cross-sectional structure.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a vehicle body structure according to an embodiment of the present invention as seen from the obliquely forward outer side of a vehicle.
FIG. 2 is a perspective view showing the bracket of the vehicle body structure according to the embodiment of the present invention, as viewed from the obliquely forward outer side of the vehicle body.
FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG.
4 is a cross-sectional view taken along line 4-4 of FIG.
FIG. 5 is a cross-sectional view corresponding to FIG. 3, showing a vehicle body structure according to another embodiment of the present invention.
FIG. 6 is a perspective view showing a vehicle body structure of a conventional example as seen from the obliquely forward outer side of the vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rocker 10A Rocker upper wall part 10B Rocker vehicle width direction outer side wall part 10C Rocker vehicle width direction inner side wall part 10D Rocker lower wall part 12 Rocker outer reinforcement 14 Rocker inner 16 Rocker closed cross section 20 Center pillar 22 Center Pillar outer reinforcement 24 Center pillar inner 30 Bracket (reinforcing member)
30A Bracket upper wall 30B Bracket front wall 30D Bracket rear wall

Claims (4)

A rocker that has a closed cross-sectional structure and extends in the vehicle longitudinal direction;
A pillar having a lower part coupled to the upper part of the rocker;
A front wall portion fixed by one-side welding to the lower portion of the pillar inside the rocker, and closing a substantially entire area of the closed cross section of the rocker on a substantially extended line of the front wall portion of the pillar; A reinforcing member having a rear wall that closes substantially the entire area of the closed cross-section of the rocker on a substantially extended line of the wall;
The reinforcing member is U-shaped with the opening facing downward in a side view, and the upper wall portion of the reinforcing member and the upper wall portion of the rocker are a part of the coupling portion between the pillar and the rocker. Body structure characterized by a double structure over almost the entire area . 2. The vehicle body structure according to claim 1, wherein the reinforcing member is welded on one side to an outer wall portion in the vehicle width direction and an inner wall portion in the vehicle width direction of the rocker . 2. The vehicle body structure according to claim 1, wherein the reinforcing member is welded on one side to an upper wall portion of the rocker . The vehicle body structure according to claim 1, wherein the one-side welding is laser welding .

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