JPH06166383A - Vehicle body structure of automobile - Google Patents

Abstract

PURPOSE:To improve the vehicle width direction strength of a locker portion without making weight increase large. CONSTITUTION:A locker reinforcement 26 is provided in a locker portion 12, and the reinforcement 26 is made to be of an arch type in which an approximate locker longitudinal center position is made to be a top point 26A and this top point 26A protrudes to the vehicle width direction outside. The front end 26D of the locker reinforcement 26 is coupled to the rear portion 14B of a front side member 14, and the rear end 26G of the reinforcement 26 is coupled to the front portion 18B of a rear floor side member 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of an automobile, and more particularly to a vehicle body structure having a rock reinforce.

[0002]

2. Description of the Related Art Conventionally, in a vehicle body structure of an automobile, a structure is known in which a rocker portion is provided with a reinforcement to improve the strength of the rocker portion.
No. 183.

As shown in FIG. 6, in the vehicle body structure of this automobile, a rocker reinforcement 7 is provided in a rocker 70.
Two are provided. Further, as shown in FIG. 7, the rocker inner panel 74 is provided at the rear portion 70A of the rocker 70.
The rear end 72A of the rocker reinforcement 72 and the front end 76A of the rear side member 76 are connected with the rear end member 72 sandwiched therebetween.
As a result, the joint strength between the rocker 70 and the rear side member 76 is improved.

[0004]

However, the vehicle body structure of this automobile has a rocker 70 and a rear side member 76.
It improves the bond strength with. That is, it contributes to the bending input acting on the rocker portion to increase the bending strength of other members, for example, the front side member and the rear floor side member, coupled to the rocker portion, to the rocker portion bending strength. Therefore, the strength of the rocker portion in the vehicle width direction is determined by the bending strength of each member. Therefore, the axial strength of each member,
That is, the weight efficiency is low and the weight increase is large as compared with the case of improving the tensile compression strength.

In view of the above facts, an object of the present invention is to provide a vehicle body structure capable of improving the strength of the rocker portion in the vehicle width direction without increasing the weight increase.

[0006]

According to a vehicle body structure of an automobile of the present invention as set forth in claim 1, the front end of the rocker part of the vehicle body is connected to the rear part of the front side member and the rear end is connected to the front part of the rear floor side member. It is characterized in that it is provided with an arch-shaped rocker reinforcement having an apex at the center of the rocker in the front-rear direction and an apex protruding outward in the vehicle width direction.

[0007]

In the vehicle body structure for an automobile according to the first aspect of the present invention, when a load from the side of the vehicle body acts on the rocker portion, the load is transmitted by the rocker reinforcement to the rear portion of the front side member and the front portion of the rear floor side member. It In this case, the rocker reinforcement has an arched shape with the apex at the center of the rocker in the front-rear direction and the apex protruding outward in the vehicle width direction, so the input load is transmitted along the rocker reinforcement and the front side member and the rear floor side member are connected. To each of them as an axial force.

Therefore, as compared with the conventional structure in which the strength of the rocker portion is increased by increasing the bending strength of each constituent member, the rocker portion has a structure with a high weight efficiency of improving the axial strength of the rock reinforce, that is, the tensile compression strength. The strength of can be improved. Therefore, the weight increase can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vehicle body structure of an automobile according to the present invention will be described with reference to FIGS.

In the figure, an arrow FR indicates a front direction of the vehicle body, an arrow UP indicates an upward direction of the vehicle body, and an arrow IN indicates a vehicle width inward direction.

As shown in FIG. 2, rocker portions 12 extending in the front-rear direction of the vehicle body are formed at the lower portions of both ends in the vehicle width direction of the vehicle interior of the vehicle body 10.

As shown in FIG. 1, a front wheel house 13 is provided on the front side of the rocker portion 12 in the vehicle front-rear direction, and a front side member 14 is arranged inside the front wheel house 13 in the vehicle width direction. ing. A front portion 14A of the front side member 14 extends in the vehicle body front-rear direction at a portion inside the rocker portion 12 in the vehicle width direction and serves as a skeletal member of the front body 10A. Further, the rear portion 14B of the front side member 14 is
It is curved outward in the vehicle width direction, and the rear end portion 14C is joined to the vehicle width direction inner portion of the front end 12A of the rocker portion 12.

A rear wheel house 16 is provided on the rear side of the rocker portion 12 in the vehicle front-rear direction, and a rear floor side member 18 is arranged inside the rear wheel house 16 in the vehicle width direction. A rear portion 18A of the rear floor side member 18 extends in the vehicle body front-rear direction at a portion located inside the rocker portion 12 in the vehicle width direction.
It is a skeleton member of 0B. Further, the front portion 18B of the rear floor side member 18 is curved outward in the vehicle width direction, and the front end portion 18C is coupled to the vehicle width direction inner portion of the rear end 12B of the rocker portion 12.

As shown in FIG. 3, the rocker portion 12 includes a rocker outer panel 20 which constitutes an outer portion in the vehicle width direction of the rocker portion 12 and a floor side member 22 which constitutes an inner portion in the vehicle width direction of the rocker portion 12. It is configured to have a closed cross-section portion 24 extending in the front-rear direction of the vehicle body.
In addition, in the closed cross section 24, the rock reinforce 26
Is provided.

As shown in FIG. 1, in the rocker reinforcement 26, a portion outside the center floor cross member 28 in the vehicle width direction, which is substantially the center position in the rocker front-rear direction, is defined as a vertex 26A. It has an arched shape that protrudes outward. That is, Rockari Force 2
6 is an arcuate shape that bulges outward in the vehicle width direction in plan view, and the center position of the rocker in the front-rear direction is the apex 26A.

As shown in FIG. 3, the cross-sectional shape of the rock reinforce 26 seen from the front-rear direction of the vehicle body is a U-shaped cross-section with the opening facing inward in the vehicle width direction. A flange 26B is formed toward the upper side in the vertical direction, and a flange 26C is formed at the lower end edge of the opening toward the lower side in the vehicle vertical direction. Further, the flange 26B of the rock reinforce 26 is formed by the rocker outer panel 2
No. 0 upper flange 20A and the floor side member 22 upper flange 22A are welded, and the flange 26C of the rocker reinforcement 26 includes a lower flange 20B of the rocker outer panel 20 and a lower flange 22B of the floor side member 22. Is welded between. Note that FIG.
Reference numeral 30 indicates a floor pan.

As shown in FIG. 4, the rear portion 14B of the front side member 14 is a front side member outer 3 which constitutes an outer side portion of the front side member 14 in the vehicle width direction.
2 and a front side member inner 34 that forms an inner side portion of the front side member 14 in the vehicle width direction, and a closed cross section 36 that communicates with the closed cross section 24 (see FIG. 3).
The structure has In addition, the front end 26D of the rocker reinforcement 26 is inserted into the closed cross-section portion 36, and the upper wall portion 26E of the front end 26D of the rocker reinforcement 26 is welded to the upper wall portion 34A of the front side member inner 34. Front end 2 of the reinforcement 26
The lower wall portion 26F of 6D is the front side member inner 3
4 is welded to the lower wall portion 34B.

As shown in FIG. 5, the rear end 20C of the rocker outer panel 20 is constituted by the front portion 18B of the rear floor side member 18, and the closed cross section 38 which communicates with the closed cross section 24 (see FIG. 3). The structure has Further, the rear end 26G of the lock reinforce 26 is inserted into the closed cross-section part 38, and the upper wall part 26H of the rear end 26G of the lock reinforce 26 is welded to the upper wall part 18D of the rear floor side member 18. A lower wall portion 26J of the rear end 26G of the rocker reinforcement 26 is welded to a lower wall portion 18E of the rear floor side member 18.

Next, the operation of this embodiment will be described. In the vehicle body structure for an automobile of this embodiment, when a load (arrow F1 in FIG. 1) from the vehicle body acts on the rocker portion 12, the load is applied by the rocker reinforcement 26 to the rear portion 14B of the front side member 14 and the rear floor side member. 18 is transmitted to the front part 18B. In this case, since the rocker reinforcement 26 has an apex 26A at the center position in the front-rear direction of the rocker, and the apex 26A has an arched shape protruding outward in the vehicle width direction, the input load (arrow F1 in FIG. 1) is applied to the rocker reinforcement 26. The force is transmitted along the axial direction and is transmitted to the front side member 14 and the rear floor side member 18 as a force (arrow F2 and arrow F3 in FIG. 1) along the axial direction.

Therefore, as compared with the conventional structure in which the strength of the rocker portion 12 is improved by increasing the bending strength of each component,
The strength of the rocker portion 12 can be improved with a structure having a high weight efficiency of improving the strength of the rocker reinforcement 26 in the axial direction, that is, the tensile compression strength. Therefore, the weight increase can be reduced.

Further, in the vehicle body structure of the automobile of this embodiment,
Unlike the conventional structure, there is no bent part at the joint of each member,
The buckling load of the bent portion does not become a problem.

[0022]

In the vehicle body structure of an automobile according to the present invention, the front end is connected to the rocker portion of the vehicle body, the front end is connected to the rear portion of the front side member, and the rear end is connected to the front portion of the rear floor side member. Since the configuration is provided with the arch-shaped rock reinforce having the apex protruding outward in the vehicle width direction, it has an excellent effect that the vehicle width direction strength of the rocker portion can be improved without increasing the weight increase. .

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a vehicle body structure of an automobile according to an embodiment of the present invention as seen from the diagonally front inside side of the vehicle body.

3 is a sectional view taken along line 3-3 of FIG.

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

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a perspective view showing a vehicle body structure of an automobile according to a conventional example, as seen from an oblique front inside of the vehicle body.

7 is a sectional view taken along line 7-7 of FIG.

[Explanation of symbols]

 10 vehicle body 12 rocker part 14 front side member 14B rear part 18 rear floor side member 18B front part 26 rocker reinforcement 26A apex 26D front end 26G rear end

Claims (1)

[Claims] 1. An arch in which a front end is coupled to a rocker portion of a vehicle body and a rear end is coupled to a rear portion of a front side member and a rear end is coupled to a front portion of a rear floor side member, respectively, and an apex of the rocker is centered in the longitudinal direction of the rocker, and the apex projects outward in the vehicle width direction. A car body structure characterized by having a modeled rock reinforce.