JPH06206579A - Lower part body structure for vehicle - Google Patents

Abstract

PURPOSE:To provide a lower part body structure for a vehicle for reducing a number of part items while improving shock absorptiveness. CONSTITUTION:In a lower part body structure for a vehicle formed with a closed section structure by a pillar reinforce 22 and a lock pillar 21 by arranging the pillar reinforce 22 along a vertical direction in a lower part side in the inside of the lock pillar 21 of a two-door vehicle, the pillar reinforce 22 is formed so as to spread out its lower end part side, and a lower end part front side location 22b of the pillar reinforce 22 is extended frontward in a side sill 2 and also formed into a bag structure. The front side location 22b is fixed into the side sill 2, and a lower end part rear side location 22c of the pillar reinforce 22 is extended rearward and connected to a rear wheel house 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower vehicle body structure of a vehicle, and more particularly to an improvement of a pillar reinforcement arranged in a lock pillar of a two-door vehicle.

[0002]

2. Description of the Related Art Conventionally, some lock pillars of a two-door vehicle are provided with a pillar reinforcement to improve rigidity.

An example is shown in FIGS. 7 to 9. That is, reference numeral 1 in FIG. 7 is a lock pillar,
Reference numeral 2 is a side sill, reference numeral 3 is a rear wheel house, and a pillar reinforcement 4 is provided in the lock pillar 1.

Specifically, as shown in FIG. 8, the lock pillar 1 is formed by joining a lock pillar inner 5, a body side outer 6, and a rear fender 7 from the vehicle interior side, and at the same time, the lock pillar inner is formed. The pillar reinforcement 4 is disposed on the lower side between the body 5 and the body side outer 6. The pillar reinforcement 4 has a hat-shaped cross section and is joined to the lock pillar inner 5. A plate-shaped sill brace 10 is arranged below the pillar reinforcement 4 as shown in FIG. 7.

Further, reference numeral 8 in FIG. 8 is a floor panel, and this floor panel 8 has a step portion 8a formed in a staircase shape in the vicinity of the front side of the rear wheel house 3, and this step portion 8a.
On the lower side, as shown in FIG. 9, a cross member 9 is arranged along the vehicle width direction to form a closed cross section 11.

An example of this type is described in Japanese Utility Model Laid-Open No. 63-156873.

[0007]

However, in such a conventional one, a load is applied to the pillar reinforcement 4 at the time of a side collision of the vehicle, but the reinforcement 4 and the closed cross section 11 are separated from each other. Therefore, the impact absorbing ability of the closed cross-section portion 11 from the reinforcement 4 is not effectively exhibited, and the impact absorbing property cannot be said to be good.

Further, since the sill brace 10 is arranged below the pillar reinforcement 4 to secure the strength, the number of parts is increased.

Therefore, it is an object of the present invention to provide a lower vehicle body structure for a vehicle, in which the shock absorption is improved and the number of parts is reduced.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a pillar reinforce is provided along the up-down direction on the lower side inside the lock pillar of a two-door vehicle. In a lower body structure of a vehicle in which a closed cross-section structure is formed by a pillar reinforcement and a lock pillar, the pillar reinforcement is formed so that the lower end side is widened toward the end, and the front side portion of the lower end of the pillar reinforcement is a side sill. Rear wheel house or the rear wheel by extending forward and forming a bag structure, fixing the front portion inside the side sill, and extending the rear portion of the lower end portion of the pillar reinforcement backward. It is characterized in that it has a lower body structure of a vehicle coupled to the vicinity of the house.

[0011]

According to such means, since the rear portion of the lower end portion of the pillar reinforcement is extended rearward and joined to the rear wheel house or the vicinity of the rear wheel house, the pillar reinforcement and the lock pillar are The closed cross-section portion formed in 1) and the closed cross-section portion formed in the vehicle width direction on the floor as described above are continuous. Therefore,
The impact load input to the pillar reinforce at the time of a vehicle side collision is effectively transmitted to the closed cross section of the floor, so that the impact energy absorption capability is improved.

Further, since the front portion of the lower end of the pillar reinforcement is formed in a bag structure and is fixed in the side sill, rigidity can be ensured and the sill brace used in the past can be eliminated, so that the number of parts can be reduced. You can

[0013]

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

1 to 4 show a first embodiment of the present invention. It should be noted that the same or equivalent members as the conventional ones will be described with the same reference numerals.

First, the structure will be described. Reference numeral 21 is a lock pillar, reference numeral 2 is a side sill, reference numeral 3 is a rear wheel house, and a pillar reinforcement 22 is disposed in the lock pillar 21.

Specifically, the lock pillar 21 includes the lock pillar inner 5, the body side outer 6, and the lock pillar inner 5, from the vehicle interior side.
The rear fender 7 is joined and formed, and the pillar reinforcement 22 is disposed on the lower side between the lock pillar inner 5 and the body side outer 6 (details will be described later).

The side sill 2 has a closed cross-section structure including the sill inner 23 and a part of the body side outer 6, and the body side outer 6 is joined to the front end 7a of the lower end of the rear fender 7.

The sill inner 23 has a rear end 23a
As shown in FIG. 4, the wheel house outer 25 of the rear wheel house 3 and the flange portions 25a, 26 of the inner 26 are formed.
It is joined to a.

Further, as shown in FIGS. 3 and 4, a flange portion 8b of the floor panel 8 is joined and disposed on the vehicle interior side of the sill inner 23. The floor panel 8 has a stepped portion 8a formed in a staircase shape in the vicinity of the front side of the rear wheel house 3, and a cross member 9 is arranged below the stepped portion 8a to form a closed cross-section portion 11. There is.

The pillar reinforcement 22 is formed so that its lower end side has a divergent shape along the vertical direction. The upper portion of the pillar reinforcement 22 has a hat-shaped horizontal cross section, and the upper flange portion 22a is joined to the lock pillar inner 5.
A front side portion 22b at the lower end of the pillar reinforcement 22 is extended forward in the side sill 2 and formed into a bag structure, and the front side portion 22b is fixed in the side sill 2. The front side portion 22 is formed in a shape that substantially closes the internal space of the side sill 2.

Further, as shown in FIG. 4, the rear side portion 22c of the lower end portion of the pillar reinforcement 22 is extended rearward,
This rear side portion 22c, the flange portion 25b of the rear wheel house outer 25, and the flange portion 7b of the rear fender 7
And 3 are hit by spot welding.

Further, the body side outer 6 has its rear end portion 6a not extended to the wheel house 3 but joined to the pillar reinforcement 22.

Next, the operation will be described. In such a configuration, the rear portion 2 of the lower end portion of the pillar reinforcement 22 is
Since 2c is extended rearward and joined to the rear wheel house 3, the closed cross-section structure formed by the pillar reinforcement 22 and the lock pillar inner 5 and the like, and the closed cross-section part on the floor panel 8 side as described above. 11 will be continuous.

Therefore, at the time of a side collision of the vehicle, the impact load input to the pillar reinforcement 4 is effectively transmitted to the closed cross section 11 on the floor panel 8 side, so that the impact energy absorption capability is improved.

Further, since the front side portion 22b of the lower end portion of the pillar reinforcement 22 is formed in a bag structure and is fixed so as to close the side sill 2, the strength of the side sill 2 can be improved at this portion. As a result, the conventionally used sill brace 10 can be eliminated, and the number of parts can be reduced. FIG. 5 shows a second embodiment of the present invention.

In this embodiment, the pillar reinforcement 3 is used.
The rear side portion 32a of the lower end portion of 2 is bent and joined to the flange portions 25a and 26a of the wheel house 3.
Even in this case, the load input to the pillar reinforcement 32 can be effectively transmitted to the floor panel 8 side.

FIG. 6 shows a third embodiment of the present invention.

In this embodiment, the rear end portion 6a of the body side outer 6 can be further extended rearward to hit four with the flange portion 25b of the wheel house outer 25 and the like.

In this way, the body side outer 6
The member weight increases, but the rigidity is improved.

Although the side sill 2 is composed of the body side outer 6 and the sill inner 23, the present invention is not limited to this, and it goes without saying that the sill outer 24 may be used instead of the body side outer 6. Also, the rear side portions 22c and 32a of the pillar reinforcements 22 and 32 are
Even if it is not directly fixed to the rear wheel house 3, even if it is fixed near this, the load can be effectively transmitted to the floor panel 8 side.

[0031]

As described above, according to the present invention, the impact load input to the pillar reinforcement is effectively transmitted to the closed cross section of the floor panel at the time of side collision of the vehicle. The absorption capacity of can be improved. In addition, the front portion of the lower end of the pillar reinforcement is formed in a bag structure and is fixed in the side sill, so the sill brace used in the past can be eliminated and the number of parts can be reduced, which is practically useful. Be effective.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a lower body structure of a vehicle according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of the first embodiment.

FIG. 3 is a sectional view taken along the line AA of the first embodiment.

FIG. 4 is a sectional view taken along the line BB of the first embodiment.

FIG. 5 is a sectional view corresponding to FIG. 4 showing a second embodiment of the present invention.

FIG. 6 is a sectional view corresponding to FIG. 4, showing a third embodiment of the present invention.

FIG. 7 is a front view corresponding to FIG. 1 showing a conventional example.

8 is a cross-sectional view taken along the line CC of FIG.

9 is a sectional view taken along the line DD of FIG.

Claims (1)

[Claims] 1. A lower vehicle body of a vehicle in which a pillar reinforce is arranged in a vertical direction on a lower side inside a lock pillar of a two-door vehicle, and a closed cross-section structure is formed by the pillar reinforce and the lock pillar. In the structure, the pillar reinforcement is formed such that the lower end side is widened toward the end, and the front side portion of the lower end portion of the pillar reinforcement is extended forward in the side sill and formed into a bag structure, and the front side portion is formed into the side sill. Fixed inside,
A lower vehicle body structure for a vehicle, characterized in that a rear side portion of a lower end portion of the pillar reinforcement is extended rearward and connected to a rear wheel house or a vicinity of the rear wheel house.