JP3307870B2 - Car body side sill reinforcement structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side sill reinforcement structure for an automobile body having an inner panel and an outer panel facing each other in a vehicle width direction, and a pair of left and right reinforcing panels interposed between the inner panel and the outer panel. It is.

[0002]

2. Description of the Related Art Generally, a vehicle body is provided with a sheet metal side sill which constitutes a lower portion thereof and extends in the front-rear direction. Conventionally, this side sill faces the inner and outer panels in the vehicle width direction. And a pair of left and right reinforcing panels interposed between the inner and outer panels (Japanese Patent Laid-Open No. 8-192767).

[0003]

By the way, in the side sill having the above structure, it is possible to join the upper edges and the lower edges of the respective panels by spot welding to thereby connect the panels to each other. It is conceivable, however, that in this case, each of the above-mentioned edges becomes four-ply.

However, when the number of members to be superimposed becomes four or more as described above, when welding is performed by spot welding using a commonly used welding gun, the welding becomes insufficient and the bonding strength becomes insufficient. May be insufficient, and the side sill having the above-described configuration may not be able to secure sufficient strength for providing the pair of left and right reinforcing panels.

On the other hand, as described above, before the side sill,
The rear end is joined to the front and rear pillars to ensure sufficient strength, but the strength of the middle portion in the longitudinal direction of the side sill tends to be lower than this.

Therefore, when the vehicle body receives a large impact force at the time of a collision or the like, there is a possibility that stress tends to concentrate on a middle portion of the side sill.

The present invention has been made in view of the above circumstances. When the side sill includes a pair of left and right reinforcing panels, the side sill has sufficient strength to match these reinforcing panels. The task is to do so.

Further, in a side sill in which the front and rear ends are joined to the front and rear pillars, when the front and rear ends of the side sill are compared with the intermediate portion, the strength of each part is more uniform. It is another object of the present invention to prevent a stress from being concentrated in a middle portion of the side sill when the vehicle body receives a large impact force.

[0009]

Means for Solving the Problems A side sill reinforcing structure for an automobile body according to the present invention for solving the above problems is as follows.

According to the first aspect of the present invention, a lower portion of the vehicle body 1 is formed and extends in the front-rear direction.
The side sill 6 coupled to the vehicle 10 includes an inner and outer panels 16 and 17 facing each other in the vehicle width direction, and a pair of left and right reinforcing panels 18 and 19 interposed between the inner and outer panels 16 and 17. In the side sill reinforcement structure of the automobile body in which the upper edges 21 of the panels 16 to 19 and the lower edges 22 are respectively joined,

The two reinforcing panels 18 joined to each other,
Notches 25 are alternately formed along the longitudinal direction of each of the edges 21 and 21 (and the edges 22 and 22) of the 19, and within each of the notches 25, a reinforcement in which the notch 25 is not formed is provided. Edges 21 (and edge 2 of panels 18 and 19)
2) and the edge 2 of the inner and outer panels 16 and 17
Spot welding S1,1,21 (and edges 22,22)
It is bound to each other by,

[0012] before top SL side sill 6, the pitch dimension _{(P 1} of the spot welding S at the rear end side, P _{2, P} 4,
P ₅ ), the pitch dimension P ₃ in the middle part of the side sill 6 is made shorter ,

[0013] The short portion of the pitch dimension P ₃ of the spot welding S in the middle portion of the upper SL side sill 6, is obtained by offset either one of the pillar side of said front and rear pillars 9,10 .

[0014]

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

In FIG. 2, reference numeral 1 denotes an automobile body.
The arrow Fr indicates the front.

The vehicle body 1 is supported on a running road surface 4 by front wheels 2 and rear wheels 3. The vehicle body 1 is made of sheet metal, and constitutes left and right lower portions of a front portion thereof and extends in the front-rear direction. A left and right lower portion of a rear portion of the vehicle body 1 constitutes a rear portion of the side sill 6. It has another side sill 7 extending in the front-rear direction, and these side sills 6 and 7 are integrally formed with each other. These left side sills 6,
Floor panel 8 between 7 and right side sills 6 and 7
Has been erected.

The front and rear ends of the side sill 6 are integrally and rigidly connected to the lower ends of the front and rear pillars 9 and 10, respectively. ,Previous,
The rear pillars 10 and 11 are integrally and rigidly connected to the lower ends thereof. Each side of the roof panel 12 is supported on each of the upper ends of the pillars 9 to 11, and the interior of the vehicle body 1 surrounded by the floor panel 8, the left and right pillars 9 to 11, and the roof panel 12 is a vehicle compartment 13. ing. Note that the pillar denoted by reference numeral 10 is generally called a center pillar.

In FIGS. 1, 3, and 4, the side sill 6
Are inner and outer panels 16 and 17 facing each other in the vehicle width direction and extending in the front-rear direction;
A pair of right and left reinforcing panels 18 and 19 interposed between the first and second panels 6 and 17 and extending in the front-rear direction.
Upper edges 21 and lower edges 22 of 9 are joined to each other. In this case, a space 2 is provided between the vertical portions of the panels 16 to 19.
3 are provided and have a box-shaped cross section. Bulkheads 24 are attached to the reinforcing panel 19 at various locations in the longitudinal direction by spot welding S, and the reinforcing panel 19 is reinforced.

The two reinforcing panels 18 joined to each other,
Notches 25 are alternately formed in the respective edges 21 and 21 (and edges 22 and 22) of the 19 along the longitudinal direction, and in each of the notches 25, a reinforcement in which the notch 25 is not formed is provided. The edges 21 (and edges 22) of the panels 18 and 19 and the edges 21 and 21 (and edges 22 and 22) of the inner and outer panels 16 and 17 are joined to each other by spot welding S.

According to the above configuration, the spot to be spot-welded S is spot-welded S in a triple-layered manner except for the edge 21 (and the edge 22) where the notch 25 is formed. The number of members to be overlapped for the welding S is reduced to less than four, and the welding is sufficient, and a predetermined bonding strength is secured.

Moreover, the notches 25 are provided at the edges 21 and 21 (and at the edges 22 and 2) of the reinforcing panels 18 and 19.
2) are alternately formed along the longitudinal direction, that is, one of the reinforcing panels 18 and 19 and each edge 21, 21 and 21 (and end) of the inner and outer panels 16 and 17 are formed. Rim 22, 22, 22)
And the other reinforcing panel 19 and the inner,
Edges 21, 21, 21 of outer panels 16, 17
1 (and edges 22, 22, 22) are obtained alternately along the longitudinal direction. For this reason, the inner and outer panels 16 and 17 are prevented from being unevenly reinforced by one of the reinforcing panels 18 and 19, and are reinforced by the respective reinforcing panels 18 and 19 without unevenness and in a well-balanced manner. Becomes

Therefore, when the side sill 6 includes the pair of left and right reinforcing panels 18 and 19, the side sill 6 has sufficient strength to match the reinforcing panels 18 and 19.

In FIG. 1, the pitch dimension (P ₁ , P ₂ , P ₄ , P ₅ ) of the spot weld S at the front and rear end sides of the side sill 6 in the longitudinal direction of the side sill 6.
Than, the pitch dimension P ₃ in the longitudinal direction of the intermediate portion of the side sill 6 is shortened.

Here, the strength of the middle portion in the longitudinal direction of the side sill 6 tends to be lower than the strength of the front and rear end portions of the side sill 6 before being joined to the front and rear pillars 9 and 10. as such, because of the shorter pitch dimension P ₃ of the spot welding S in an intermediate portion of the side sill 6, correspondingly, the panels 16 in the intermediate portion of the side sill 6
The connection between the 19 portions is further strengthened, and the strength of the intermediate portion is improved.

Therefore, in the side sill 6 in which the front and rear pillars are joined to the front and rear pillars 9 and 10, when the front and rear ends of the side sill 6 are compared with the intermediate portions, the strength of each part is different from each other. Therefore, when the vehicle body 1 receives a large impact force such as at the time of a collision of the vehicle body 1, it is possible to prevent the stress from being concentrated in the middle of the side sill 6.

In FIG. 1, when the vehicle receives an impact force from the front or the rear thereof, the side sills 6 (or the side sills 7) are provided so that the side sills 6 and 7 can more firmly oppose the impact force. middle section with a pitch dimension P ₃ short portion of the spot welding S) of the said front and rear pillars 9, 10 (or 10, 11)
Is deflected to one of the pillars.

[0027] More specifically, prior to the front portion of the body 1, in the intermediate portion of the side sill 6 between the rear pillars 9 and 10, portions shorter pitch dimension P ₃ of the spot welding S is pre-pillar 9 Side sill 6
The front side is more reinforced.

For this reason, while the vehicle is traveling forward, the vehicle body 1
When a vehicle collides with any object in front of it (at the time of a frontal collision), the side sill 6 receives a particularly large impact force at its front side, but as described above, the front side of the side sill 6 is further reinforced. The side sill 6 can more firmly resist the impact force, and the deformation of the vehicle compartment 13 is more reliably prevented.

Although the above description is based on the illustrated example, the configuration of the side sill 6 may be applied to the other side sill 7 described above. In this case, the reference numerals corresponding to the front and rear pillars are 10 and 11, respectively. Become.

Further, before the rear portion of the body 1, in the intermediate portion of the side sill 7 between the rear pillars 10 and 11, the rear portion where the pitch dimension P ₃ are shortened spot welding S pillar 1
The rear side of the side sill 7 may be further reinforced by being deviated to one side. In this manner, when the vehicle body 1 of the automobile is collided from behind (at the time of a rear collision), the rear side of the side sill 7 receives a particularly large impact force. Since the side sill 7 is further reinforced, the side sill 7 can more strongly resist the impact force.

[0031]

The effects of the present invention are as follows.

According to the first aspect of the present invention, a side sill, which constitutes a lower portion of the vehicle body and extends in the front-rear direction, has front and rear ends connected to the front and rear pillars, has inner and outer panels facing each other in the vehicle width direction. And a pair of left and right reinforcing panels interposed between the inner and outer panels, and a side sill reinforcement for an automobile body in which upper edges and lower edges of the panels are joined to each other. In structure

Notches are formed alternately along the longitudinal direction at the edges of the two reinforcing panels joined to each other, and within each of the notches, the edges of the reinforcing panel on which the notches are not formed are formed. And the edges of the inner and outer panels are connected to each other by spot welding.

For this reason, the spot to be spot-welded is spot-welded in a three-layered manner except for the edge where the notch is formed, so that the number of members to be overlapped for spot-welding is four. When the number is less than the number of sheets, the welding becomes sufficient, and a predetermined bonding strength is secured.

Moreover, the cutouts are formed alternately along the longitudinal direction at the respective edges of the two reinforcing panels, that is, one of the reinforcing panels and the inner and outer panels at the respective edges of the inner and outer panels. The mutual connection and the mutual connection of the respective edges of the other reinforcing panel and the inner and outer panels are obtained alternately along the longitudinal direction. Therefore, the inner panel and the outer panel are prevented from being unevenly reinforced by one of the reinforcing panels, and the respective reinforcing panels are reinforced without unevenness in a balanced manner.

Therefore, when the side sill has a pair of left and right reinforcing panels, the side sill has sufficient strength to match these reinforcing panels.

Further, prior to the side sill, than the pitch dimension of the spot weld at the rear end, Yes by shortening the pitch dimension in the intermediate portion of the side sill occurs the following effects.

That is, the strength of the middle portion in the longitudinal direction of the side sill tends to be lower than the strength of the front and rear end portions connected to the front and rear pillars.
Since the pitch dimension of the spot welding in the middle portion of the side sill is further reduced, the strength of the middle portion of the side sill is improved accordingly.

Therefore, in the side sill in which the front and rear ends are joined to the front and rear pillars, the strength of each part becomes more uniform when the front and rear ends of the side sill are compared with the middle part. In addition, when the vehicle body receives a large impact force, it is possible to prevent stress from being concentrated in the middle of the side sill.

Further, a portion where the pitch dimension of the spot welding is shortened in the middle of the side sill is shifted toward one of the front and rear pillars.

For this reason, for example, when a vehicle collides, a portion where the above-mentioned pitch dimension is shortened is deviated before or after it is considered that a larger impact force is received, and this deviation is performed. If you reinforce the side more strongly,
The side sill can more firmly oppose the impact force, so that the deformation of the cabin is effectively prevented.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of FIG. 2;

FIG. 2 is a side view of the vehicle body.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 6 Side sill 9,10 pillar 13 Cabin 16 Inner panel 17 Outer panel 18,19 Reinforcement panel 21,22 Edge 25 Notch S Spot welding

Claims (1)

(57) [Claims] 1. A side sill, which constitutes a lower portion of a vehicle body and extends in the front-rear direction, has front and rear ends joined to front and rear pillars, and has an inner and an outer panel facing in the vehicle width direction. A pair of left and right reinforcement panels interposed between the outer panels, and upper edges of each of the panels,
In the side sill reinforcement structure for an automobile body in which the lower edges are respectively joined to each other, a notch is formed alternately along the longitudinal direction at each of the edges of the two reinforcing panels joined to each other, and each of these notches is formed. in-out, and the edge of the reinforcing panel the notch is not formed, the inner, coupled to each other by spot welding the end edges of the outer panel, before top Symbol sill, of the spot weld at the rear end portion than the pitch dimension, shortening the pitch dimension in the intermediate portion of the side sill, a portion of a shorter pitch size of the spot weld in the middle portion of the upper Symbol sill, the front, on one of the pillar-side one of the rear pillars side sill reinforcement structure of automobile body obtained by offset.