JP2990983B2 - Car body 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 vehicle body structure, and more particularly to a vehicle body structure provided with a rock reinforce.

[0002]

2. Description of the Related Art Conventionally, in a vehicle body structure, a structure in which a reinforcement is provided in a rocker portion to improve the strength of the rocker portion has been known.
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.
2 are provided. As shown in FIG. 7, a rocker inner panel 74 is provided at a rear portion 70A of the rocker 70.
The rear end 72A of the rock reinforce 72 and the front end 76A of the rear side member 76 are connected with each other,
Thereby, the joining strength between the rocker 70 and the rear side member 76 is improved.

[0004]

However, the vehicle body structure of this automobile is composed of a rocker 70 and a rear side member 76.
And to improve the bonding strength. That is, for the bending input acting on the rocker portion, the contribution of other members coupled to the rocker portion, for example, the front side member and the rear floor side member, to the rocker portion bending strength is increased. Therefore, the strength in the vehicle width direction of the rocker portion 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 where the tensile compression strength is improved.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a vehicle body structure in which the strength of a rocker portion in the vehicle width direction can be improved without increasing the weight.

[0006]

SUMMARY OF THE INVENTION The present invention as set forth in claim 1, a motor vehicle chassis frame and the body are disposed is rocker reinforcement in the rocker portion of a vehicle body made in one piece
A vehicle body structure, said rocker reinforcement is the front end has an apex substantially rocker longitudinal center position with the rear end to the front side member rear portion are coupled to the rear floor side member front the vertices outside in the vehicle width direction It is characterized by having an arch shape that protrudes into the shape.

[0007]

In the vehicle body structure 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 to the rear portion of the front side member and the front portion of the rear floor side member by the rocker reinforcement. You. In this case, since the rock reinforce has an arch shape whose vertex is located substantially at the center position in the front-rear direction of the rocker and the vertex projects outward in the vehicle width direction, the input load is transmitted along the rock reinforce, and the front side member, the rear floor side member and To each other as an axial force.

Therefore, compared to the conventional structure in which the strength of the rocker portion is improved by increasing the bending strength of each component, the rocker portion has a structure with high weight efficiency of improving the axial strength of the rocker reinforcement, that is, the tensile compression strength. Can be improved in strength. For this reason, weight increase can be reduced.

[0009]

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

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

As shown in FIG. 2, a lower portion of both ends in the vehicle width direction of a vehicle body of a vehicle body 10 is a rocker portion 12 extending in the vehicle front-rear direction.

As shown in FIG. 1, a front wheel house 13 is provided on the front side of the rocker section 12 in the vehicle longitudinal direction, and a front side member 14 is disposed inside the front wheel house 13 in the vehicle width direction. ing. The front portion 14A of the front side member 14 extends in the vehicle front-rear direction at a position inside the rocker portion 12 in the vehicle width direction and serves as a frame member of the front body 10A. The rear portion 14B of the front side member 14 is
It is curved outward in the vehicle width direction, and a rear end portion 14C is connected to a vehicle width direction inside portion of a front end 12A of the rocker portion 12.

A rear wheel house 16 is provided behind the rocker section 12 in the vehicle longitudinal direction. A rear floor side member 18 is disposed 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 front-rear direction at a position inward of the rocker portion 12 in the vehicle width direction.
0B skeletal member. Further, a front portion 18B of the rear floor side member 18 is curved outward in the vehicle width direction, and a front end portion 18C is coupled to a vehicle width direction inside portion of the rear end 12B of the rocker portion 12.

As shown in FIG. 3, the rocker portion 12 is composed of a rocker outer panel 20 that forms an outer portion of the rocker portion 12 in the vehicle width direction, and a floor side member 22 that forms an inner portion of the rocker portion 12 in the vehicle width direction. And has a closed section 24 extending in the front-rear direction of the vehicle body.
In the closed section 24, a rock reinforce 26 is provided.
Is provided.

As shown in FIG. 1, the rocker reinforcement 26 has an apex 26A at an outer portion of the center floor cross member 28 in the vehicle width direction, which is located substantially at the center of the rocker in the front-rear direction. It has an arch shape projecting outward. That is, Rocky Reinforce 2
Reference numeral 6 denotes a circular arc bulging outward in the vehicle width direction in a plan view, and a vertex 26A is located at a substantially rocker front-rear direction center position.

As shown in FIG. 3, the cross-sectional shape of the rock reinforce 26 when viewed from the vehicle front-rear direction is a U-shaped cross-section with the opening directed 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 edge of the opening toward the lower side in the vehicle vertical direction. Further, the flange 26B of the rocker reinforcement 26 is connected to the rocker outer panel 2.
0 is welded between the upper flange 20A and the upper flange 22A of the floor side member 22. The flange 26C of the rocker reinforcement 26 is connected to the lower flange 20B of the rocker outer panel 20 and the lower flange 22B of the floor side member 22. Welded between. Note that FIG.
Reference numeral 30 indicates a floor pan.

As shown in FIG. 4, a rear portion 14B of the front side member 14 is provided with a front side member outer 3 which constitutes an outer portion of the front side member 14 in the vehicle width direction.
2 and a front side member inner 34 that forms an inner 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).
It has a structure having. The front end 26D of the rock reinforce 26 is inserted into the closed section 36, and the upper wall 26E of the front end 26D of the rock reinforce 26 is welded to the upper wall 34A of the front side member inner 34. Front end 2 of Reinforce 26
The lower wall 26F of the 6D is the front side member inner 3
4 is welded to the lower wall portion 34B.

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

Next, the operation of this embodiment will be described. In the vehicle body structure of this embodiment, when a load (arrow F1 in FIG. 1) acts on the rocker portion 12 from the side of the vehicle body, 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 to the front 18B. In this case, since the rock reinforce 26 has an apex 26A at the approximate center position in the rocker front-rear direction and the apex 26A has an arch shape projecting outward in the vehicle width direction, the input load (arrow F1 in FIG. 1) is applied to the rock reinforce 26. And transmitted along the axial direction (arrows F2 and F3 in FIG. 1) to the front side member 14 and the rear floor side member 18, respectively.

Therefore, 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 by a structure having a high weight efficiency of improving the axial strength of the rock reinforce 26, that is, the tensile compression strength. For this reason, weight increase can be reduced.

In the vehicle body structure of the present embodiment,
Since there is no bent part at the joint of each member like the conventional structure,
The buckling load at the bent portion does not matter.

[0022]

According to the present invention, the chassis frame and the body are
Rockari info inside the rocker part of the integrally made body
Is the body structure of the car on which
The reinforcement has an arch shape in which a front end is joined to a rear part of a front side member and a rear end is joined to a front part of a rear floor side member, and a vertex is located at a center position in a substantially rocker front-rear direction, and a vertex projects outward in a vehicle width direction . Therefore, there is an excellent effect that the strength in the vehicle width direction of the rocker portion can be improved without increasing the weight.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of the vehicle body structure according to one embodiment of the present invention, as viewed from the inside of the vehicle diagonally forward.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1;

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

FIG. 5 is a sectional view taken along line 5-5 in FIG. 1;

FIG. 6 is a perspective view showing a vehicle body structure according to a conventional example, viewed obliquely from the front inside the vehicle body.

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body 12 Rocker part 14 Front side member 14B Rear part 18 Rear floor side member 18B Front part 26 Rocker reinforcement 26A Vertex 26D Front end 26G Rear end

Claims (1)

(57) [Claims] 1. The chassis frame and body are made in one piece
Rocker reinforcement is of disposed the body of the rocker portion
A body structure of a motor vehicle which, the rocker reinforcement is the front end has an apex substantially rocker longitudinal center position with the rear end to the front side member rear portion are coupled to the rear floor side member front the vertex car is the arched protruding outward in the width direction
Body structure of a motor vehicle, characterized in that there.