JP2985447B2 - Front structure of car body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front structure of a vehicle body, and more particularly, to a rocker disposed on a lateral side of a floor panel of a vehicle body and extending in the front-rear direction of the vehicle body, and disposed in front of the rocker. And a front side member extending in the front-rear direction of the vehicle body.

[0002]

2. Description of the Related Art There is a front structure of an automobile having a side sill or rocker which is arranged on a side of a vehicle body and extends in the front-rear direction of the vehicle body and a front side member which is connected to the rocker and extends in the front-rear direction of the vehicle body. For example,
-36876 gazette). In such a front structure, FIGS.
The rocker 10 is located on the lateral side of the floor panel 12 and is located below the door 16 as shown in FIG. And the front side member 14 is arrange | positioned in front of the rocker 10, and is located in the lateral side part of an engine room. The locker 10 is formed in a closed section by an inner panel 18 and an outer panel 19, and has a front side panel 14.
Is formed in a closed cross section by the inner panel 20 and the outer panel 21.

In order to increase the rigidity, the rocker 10 is provided with a reinforcement 22 and a front side member 14.
Reinforce 24 has been incorporated into
The reinforcement 22 is formed of a flat plate mainly for convenience of manufacture of the front member 14 and the front side member 14.
The reinforcement 24 is in close contact with the inner panel 20. In addition, the rocker 10 and the front side member 14 are connected via a curved portion 26 for arrangement reasons.
The front side member 14 is located inside the rocker 10 in the lateral direction of the vehicle body.

[0004]

As a result of forming the rocker 10 and the front side member 14 as described above, a line in plan view (hereinafter, referred to as a line) in which the centroids of the closed cross sections of the respective portions of the rocker 10 are connected in the front-rear direction. C1 is deviated to the outside of the vehicle body, and the center line of the front side member 14
C2 is biased toward the inside of the vehicle body, and the distance D between the centroids C1 and C2
Is getting bigger. Therefore, when the vehicle is traveling forward and collides, a large moment input is applied to the rocker 10 with respect to the input to the front side member 14,
The deformation of the vehicle body becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a front structure of an automobile body capable of reducing a moment input applied to a rocker.

[0006]

According to the present invention, there is provided a rocker which is disposed on a lateral side of a floor panel of a vehicle body and extends in the front-rear direction of the vehicle body. A front structure of an automobile body including a front side member disposed inward and extending in the front-rear direction of the vehicle body, wherein the rocker and the front side member are coupled. The rocker and the front side member are each formed in a closed cross section by an inner panel and an outer panel, and a line in plan view in which the centroid of the closed cross section in each part of the rocker is connected in the front-rear direction. It is formed so as to be deflected to the panel side, and to deviate a line in plan view, in which the centroids of the closed cross sections of the respective parts of the front side member are connected in the front-rear direction, to the outer panel side.

[0007]

[Function and Effect] The line of plan view in which the centroid of the closed cross section in each part of the rocker is connected in the front-rear direction is deviated to the inner panel side, and the centroid of the closed cross section in each part of the front side member is shifted in the front-rear direction. As a result of displacing the series of lines in plan view toward the outer panel, the distance between the rocker center line and the front side member center line is reduced. As a result, the moment input to the rocker is reduced, and the deformation of the vehicle body can be suppressed to a small range when an automobile traveling forward collides.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. Components having substantially the same shape or structure as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIGS. 1 to 5 show a front structure of an automobile body.
As shown in FIG. 2, a rocker 30 is disposed on the lateral side of the floor panel 12 of the vehicle body and extends in the front-rear direction of the vehicle body, and is disposed in front of the rocker 30 inward of the rocker 30 in the lateral direction of the vehicle body, A front side member 32 extends in the front-rear direction of the vehicle body, and the rocker 30 and the front side member 32 are combined.

The rocker 30 is formed in a closed section by the inner panel 18 and the outer panel 19. On the other hand, the front side member 32 is formed in a closed cross section by the inner panel 20 and the outer panel 21. The inner panel 18 of the rocker 30 and the inner panel 20 of the front side member 32 are connected via a curved portion 26, and the rocker 30 is formed by spot welding the flange 18a of the inner panel 18 and the flange 19a of the outer panel 19. Have been. Furthermore, the flange 21 of the outer panel 21
a, and a front side member 32 is formed by spot welding the flange 19b of the outer panel 19 to the outer panel 21 at an appropriate location on the inner panel 20, and the rocker 30 and the front side member 32 are interposed via the curved portion 26. Are combined.

The rocker 30 includes a reinforcement 34 disposed in a closed section thereof and a front side member 32.
Has a reinforcement 36 arranged in its closed section, and the shape and arrangement of these reinforcements are different from those of the prior art.

That is, the reinforcement 34 has a U-shaped cross section, is arranged close to the inner panel 18, and has upper and lower flanges 35 abutted against the inner surface of the inner panel 18 to be spot-welded. . On the other hand, the reinforcement 36 has a hat-shaped cross section, is disposed near the outer panel 21, and is spot-welded with upper and lower flanges 37 interposed between the flanges of the inner panel 20 and the outer panel 21. The shapes and arrangements of the reinforcements 34 and 36 are determined in consideration of the rigidity required for the rocker 34 and the front side member 32, respectively.

In the illustrated embodiment, the reinforcement 34
And the reinforcement 36 are connected via a smooth curved portion 38, and the curved portion 38 is connected to the inner panel 20.
The flange 39 is abutted against the inner surface of the curved portion 26 of FIG.

As a result of bringing the reinforcement 34 of the rocker 30 closer to the inner panel 18, the position of the centroid in the closed cross section of FIG. 3 approaches the inner panel 18. On the other hand, as a result of the reinforcement 36 of the front side member 32 being closer to the outer panel 21, the position of the centroid in the closed cross section in FIG. Accordingly, as shown in FIG. 1, the centroid of the closed cross section in each part of the front side member 32 is changed from the line C1 in plan view in which the centroid of the closed cross section in each part of the rocker 30 is connected in the front and rear direction. The distance d to the continuous line C2 in plan view is smaller than the distance D shown in FIG. And the centroid C1
And the centroid C2 are connected via a smooth centroid C3 of the curved portion 26. As a result, the moment input from the front side member 32 to the rocker 30 can be reduced.

To make the distance between the center line of the rocker 30 and the center line of the front side member 32 as small as possible,
There are several forms other than selecting the shape and arrangement of the reinforcement as in the above embodiment. For example, without using Reinforce, Rocker 3
0, the thickness of the inner panel 18 is made larger than the thickness of the outer panel 19, and the front side member 32 is made to make the thickness of the outer panel 21 larger than the thickness of the inner panel 20, using reinforcement, and Different thicknesses may be used, and the closed cross-sectional shape defined by the inner panel and the outer panel of each of the rocker 30 and the front side member 32 may be different from the conventional closed cross-sectional shape.

In the above embodiment, the front side lever 32
The rocker 30 and the front side member 32 are connected to each other via a curved portion 26 provided on the inner panel 20 of the first embodiment. However, instead of this, the curved portion is formed as a separate member, and this separate member is connected to the rocker and the front side member. The present invention can also be implemented in a structure in which the rocker is connected to the front side member by being connected to the members.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an operation of a front structure of an automobile body according to the present invention.

FIG. 2 is a perspective view showing a front structure of a vehicle body according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is an exploded perspective view of a front structure of the vehicle body according to the present invention.

FIG. 6 is a schematic plan view showing the operation of a conventional front structure of an automobile body.

FIG. 7 is a perspective view showing a front structure of a conventional vehicle body.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 7;

[Explanation of symbols]

 18, 20 Inner panel 19, 21 Outer panel 30 Rocker 32 Front side member 34, 36 Reinforce

Claims (1)

(57) [Claims] A rocker is disposed on a lateral side of a floor panel of a vehicle body and extends in the front-rear direction of the vehicle body. The rocker is disposed in front of the rocker and further inward of the vehicle body than the rocker in the lateral direction of the vehicle body. A front structure of an automobile body including a front side member extending in a front-rear direction, wherein the rocker and the front side member are coupled to each other, wherein the rocker and the front side member are each closed by an inner panel and an outer panel. And a line in a plan view in which the centroid of the closed cross section in each part of the rocker is connected to the inner panel side in the front-rear direction, and the closed cross section in each part of the front side member is A front structure of an automobile body, which is formed so as to deviate a line in plan view in which a center of gravity extends in the front-rear direction toward the outer panel.