JPH0664561A - Lower structure of body - Google Patents

Abstract

PURPOSE:To improve the assembling rigidity of connecting parts between a frame member and a floor panel without causing large weight increase. CONSTITUTION:The vehicle width direction inner end part 28A of a gusset 28 is formed into approximately L-shape cross section and connected, by bolts 29, to the front wall part and upper wall part of an overlapped part between the bent part 34 of a rear floor panel 32 and both vehicle width direction end parts 36A of a center floor cross reinforcement 36. The gusset 28 is extended almost horizontally outward in the vehicle width direction, and its vehicle width direction outer end part 28B is connected to a center pillar inner 30, a locker inner 26 and the rear floor panel 32 respectively by bolts 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body lower structure,
Particularly, the present invention relates to a lower structure of a vehicle body in which a floor pan and frame members provided at both ends of the floor pan in the vehicle width direction are connected by a reinforcing member.

[0002]

2. Description of the Related Art Center pillars, rockers, etc. as frame members are provided at both ends of a floor pan of an automobile body in the vehicle width direction, and a load is applied to these frame members from the outside in the vehicle width direction. An example of a lower structure of a vehicle body for reinforcing these frame members is shown in Japanese Utility Model Laid-Open No. 3-68176.

As shown in FIG. 7, in the lower structure of the vehicle body, an outer end portion 72 in the vehicle width direction of a floor reinforce 72 fixed to an upper surface of a floor pan 70 along the vehicle width direction.
A is fixed to an inner panel 78 that constitutes an inner side portion in the vehicle width direction of the intersection of the center pillar portion 74 and the locker portion 76, penetrates the inner panel 78, and the tip 72B of the floor reinforce 72 is the center. It is fixed to the outer panel 80 that constitutes the vehicle width direction outer side portion of the intersection of the pillar portion 74 and the locker portion 76. Therefore, the support rigidity of the center pillar portion 74 is improved, and the deformation of the outer panel 80 can be suppressed.

[0004]

However, in the lower structure of the vehicle body, the portion 70A of the floor pan 70 to which the floor reinforce 72 is coupled is a flat surface. For this reason, the assembling rigidity of the joint portion between the floor reinforcement 72 and the floor pan 70 is low, and the center pillar portion 7
4 or the locker portion 76 when a load is applied from the outside in the vehicle width direction, this portion 70A may be deformed. In order to prevent this, it is necessary to increase the thickness of the floor pan. Increases weight.

In view of the above facts, the present invention has an object to obtain a lower structure of a vehicle body which can improve the assembling rigidity of the connecting portion between the frame member and the floor pan without causing a significant increase in weight. is there.

[0006]

A lower part of a vehicle body according to a first aspect of the present invention is a floor pan having a bent portion having a substantially L-shaped cross section as viewed in the vehicle width direction, and the floor pan. Of the vehicle body in the vehicle width direction and the vehicle width direction inner end are substantially L-shaped in cross section and are polymer-bonded to the bent portion, and the vehicle width direction outer end is connected to the frame member in reinforcement. And a member.

[0007]

According to the vehicle body lower structure of the invention as set forth in claim 1, the skeleton members provided at both ends of the floor pan in the vehicle width direction have a substantially L-shaped cross section as viewed in the vehicle width direction. The reinforcing member is joined to the bent portion of the floor pan having high rigidity against the load applied from the vehicle width direction by the reinforcing member, and the cross-sectional shape viewed from the vehicle width direction is substantially L-shaped. The inner end is polymer-bonded to the bent portion of the floor pan.

Therefore, when a load is applied to the skeleton member from the outside in the vehicle width direction, the load is efficiently transmitted to the bent portion of the floor pan via the reinforcing member, so that the floor pan is less likely to be deformed and the skeleton member It is possible to improve the assembling rigidity of the joint between the floor pan and the floor pan. Further, in the present invention, since it is not necessary to increase the thickness of the floor pan, the weight does not increase significantly.

[0009]

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

In the figure, the arrow FR indicates the front direction of the vehicle body, the arrow IN indicates the inner direction of the vehicle body, and the arrow UP indicates the upper direction of the vehicle body.

As shown in FIG. 4, the vehicle body 10 of this embodiment.
Is a two-door type, and a side outer panel 12 is formed around the door mounting opening 10A. That is, the outer side portion in the vehicle width direction of the intersection 18 between the center pillar 14 and the locker 16 as the frame member of the vehicle body 10 is formed by the side outer panel 12.

As shown in FIG. 1, the lower portion of the side outer panel 12 is provided with a rocker outer portion 2 along the longitudinal direction of the vehicle body.
0 from the center portion of the locker outer portion 20 in the vehicle front-rear direction toward the center pillar outer portion 2 toward the upper side of the vehicle body.
2 is branched.

The lower part of the center pillar outer part 22 of the side outer panel 12 is divergent toward the front and rear direction of the vehicle body, and the cross sectional shape of the center pillar outer part 22 as seen from the vehicle body vertical direction is such that the opening is inward in the vehicle width direction. The front vertical flange 22A and the vertical rear flange 22B are formed in a hat shape.

A center pillar inner 30 is arranged along the center pillar outer portion 22 inside the center pillar outer portion 22 of the side outer panel 12 in the vehicle width direction. The front end edge portion 30A and the rear end edge portion 30B of the center pillar inner 30 are welded to the vertical front flange 22A and the vertical rear flange 22B of the center pillar outer 22, respectively. The lower part of the center pillar inner portion 30 in the vertical direction of the vehicle body is widened toward the center pillar outer part 22 of the side outer panel 12, and a rectangular opening 31 for mounting the retractor is formed in the substantially center part of this part.
Are formed.

The cross-sectional shape of the rocker outer portion 20 of the side outer panel 12 when viewed from the front-rear direction of the vehicle body is a substantially U-shape with the opening facing inward in the vehicle width direction. The rocker inner 26 is arranged along the rocker outer portion 20. The cross-sectional shape of the rocker inner 26 when viewed from the front-rear direction of the vehicle body is a substantially U-shape with the opening facing outward in the vehicle width direction.
A vehicle width direction outer end portion of A is bent upward to form a flange 26B.
And is welded to the center pillar inner 30. An outer end portion of the lower wall portion 26C of the rocker inner 26 in the vehicle width direction is bent downward to form a flange 26D, which is welded to the lower flange 20A of the rocker outer portion 20.
Further, flanges 29A, which are provided upward at both ends of the front floor pan 29 in the vehicle width direction, are welded to the lower portion of the side wall portion 26E of the rocker inner 26.

A rear floor pan 32 is provided inside the rear portion 30C of the center pillar inner 30 in the vehicle width direction. Curved portions 32A that curve downward are formed at both ends of the rear floor pan 32 in the vehicle width direction.
2B is welded to the rear portion 30C of the center pillar inner 30. Further, the front end portion of the rear floor pan 32 is bent downward at a portion on the inner side in the vehicle width direction of the opening 31 of the center pillar inner 30 to form a bent portion 34. A center floor cross reinforcement 36 having a crank-shaped cross-section viewed from the vehicle width direction is superposed on the lower side of the bending portion 34 in the vehicle width direction so as to overlap with each other along the vehicle width direction. It is welded to the bottom surface.

As shown in FIG. 2, both ends 36A of the center floor cross reinforcement 36 in the vehicle width direction reach the vicinity of the curved portion 32A of the rear floor pan 32, and both ends 36A of the center floor cross reinforcement 36 in the vehicle width direction.
A vehicle width direction inner end portion 28A of the gusset 28 serving as a reinforcing member is superposed on the upper side of the rear floor pan 32 opposed to.

As shown in FIG. 3, the cross-sectional shape of the inner end portion 28A of the gusset 28 in the vehicle width direction as viewed from the vehicle width direction is substantially L-shaped along the bent portion 34 of the rear floor pan 32.

As shown in FIG. 1, the inner end 28A of the gusset 28 in the vehicle width direction has a bent portion 3 of the rear floor pan 32.
4 and the front wall portion and the upper wall portion of the overlapping portion of the center floor cross reinforcement 36 and both ends 36A in the vehicle width direction of the center floor cross reinforcement 36, respectively. Also, gusset 2
The reference numeral 8 extends substantially horizontally toward the outer side in the vehicle width direction, and the outer end portion 28B in the vehicle width direction reaches the center pillar inner 30. In addition, the vehicle width direction outer end 28B of the gusset 28
Extends toward the outside in the vehicle width direction, straddles the opening 31, and has a U-shaped cross section with the opening facing downward.

A vehicle width direction outer end of a front wall portion 28C of a vehicle width direction outer end 28B of the gusset 28 is bent forward in the vehicle body front-rear direction to form a flange 28D, which is a center pillar inner 30. And Rocka Inna 26
Are respectively connected to and by bolts 29. Further, the rear wall portion 2 of the vehicle width direction outer end portion 28B of the gusset 28
An outer end portion in the vehicle width direction of 8E is bent rearward in the vehicle body front-rear direction to form a flange 28F. The flange 28F is connected to the center pillar inner 30 and the rear floor pan 32 by bolts 29, respectively.

Next, the operation of this embodiment will be described.
According to the lower structure of the vehicle body of this embodiment, the rear floor pan 3
The load applied to the lower portion of the center pillar inner 30 that forms the inner portion of the center pillar 14 provided at both ends in the vehicle width direction of FIG. 2 has a substantially L-shaped cross section viewed from the vehicle width direction. To the bent portion 34 of the rear floor pan 32 having high rigidity with respect to the gusset 28,
A rear floor pan 32 has an inner end 28A in the vehicle width direction of the gusset 28 having a substantially L-shaped cross section as viewed in the vehicle width direction.
And is polymer-bonded to the bent portion 34.

Therefore, when a load is applied to the center pillar 14 from the outside in the vehicle width direction, the load is transmitted to the bent portion 34 of the rear floor pan 32 via the gusset 28, so that the rear floor pan 32 is less likely to be deformed. Center pillar 1
It is possible to improve the assembling rigidity of the connecting portion between the vehicle 4 and the rear floor pan 32. Further, in this embodiment, it is not necessary to increase the plate thickness of the rear floor pan 32, and the assembling rigidity of the connecting portion between the center pillar 14 and the rear floor pan 32 can be improved with a very lightweight and simple structure. There is no significant increase in weight.

Further, in the present embodiment, as shown in FIG. 3, the vehicle width direction inner end portion 28A of the gusset 28 having a substantially L-shaped cross section viewed from the vehicle width direction is bent at the rear floor pan 32. Since the space is overlapped with the portion 34, the necessary space for the gusset 28 (the area S inside the broken line in FIG. 3) becomes the lower portion of the rear floor pan 32 and is not present in the passenger compartment, so that the rear foot space and the like become wider.

Further, in this embodiment, as shown in FIG. 1, the outer end portion 28B of the gusset 28 in the vehicle width direction is widened toward the outer side in the vehicle width direction and straddles the opening portion 31, so that the opening portion 31 is formed. Can be reinforced efficiently.

Further, in this embodiment, the gusset 28 is arranged substantially horizontally toward the outer side in the vehicle width direction and the vertical offset is eliminated, so that the weight of the gusset 28 can be reduced and the left and right center pillars can be reduced. It is possible to linearly connect the intersection portion 18 between the rocker 14 and the locker 16 with the gusset 28 and the center floor cross reinforcement 36, thereby enabling efficient reinforcement against the load input from the outside in the vehicle width direction. Has become.

Next, the second substructure of the vehicle body according to the present invention
An embodiment will be described with reference to FIGS.

Regarding the same members as in the first embodiment,
The same reference numerals are given and the description thereof is omitted.

As shown in FIG. 6, the vehicle body 40 of this embodiment.
Is a 4-door type, and the front door mounting opening 40A
The periphery and the periphery of the rear door mounting opening 40B are configured by the side outer panel 12 as an outer panel.

As shown in FIG. 5, the bent portion 34 of the rear floor pan 32 of the present embodiment is provided at a portion below the rear door mounting opening 40B and facing a substantially central portion in the vehicle front-rear direction. Therefore, the outer end portion 2 of the gusset 28 in the vehicle width direction
The flange 28D and the flange 28F of 8B are connected to the side wall portion 26E of the rocker inner 26 by bolts 29, respectively. In addition, the outer end portion 2 of the gusset 28 in the vehicle width direction
An upper wall portion 28G of 8B is extended outward in the vehicle width direction to form a flange 28H, and this flange 28H is superposed on the upper wall portion 26A of the rocker inner 26 and is in contact with the flange 26B.

Therefore, in this embodiment, except for the effect of effectively reinforcing the opening 31 for attaching the retractor,
It has the same effect as the embodiment.

In each of the above embodiments, the case where the skeleton member is the center pillar and the rocker has been described, but the skeleton member is not limited to these and may be another member such as a rear side member. Further, in each of the above-described embodiments, the gusset 28 is connected by the bolt 29, but the connection of the gusset 28 is not limited to the bolt, and other connecting methods such as welding may be used.

[0032]

According to the present invention, a floor pan having a bent portion whose cross-sectional shape when viewed from the vehicle width direction is substantially L-shaped, a skeleton member provided at both ends of the floor pan in the vehicle width direction, and a vehicle Since the inner end in the width direction has a substantially L-shaped cross-section, and the reinforcing member is superposed and joined to the bent portion of the floor pan and the outer end in the vehicle width direction is joined to the skeleton member, the weight is significantly increased. There is an excellent effect that the assembling rigidity of the joint portion between the skeleton member and the floor pan can be improved without inviting.

[Brief description of drawings]

FIG. 1 is a perspective view of a lower structure of a vehicle body according to a first embodiment of the present invention as seen from an oblique front inside of a vehicle body.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

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

FIG. 4 is a schematic perspective view showing a vehicle body to which a lower body structure of a first embodiment of the invention is applied.

FIG. 5 is a perspective view showing the lower structure of the vehicle body of the second embodiment of the present invention as seen from the diagonally rearward inner side of the vehicle body.

FIG. 6 is a schematic perspective view showing a vehicle body to which a lower body structure of a second embodiment of the invention is applied.

FIG. 7 is a perspective view showing a lower structure of a vehicle body of a conventional example as seen from an oblique front inside of the vehicle body.

[Explanation of symbols]

 10 vehicle body 12 center pillar (frame member) 14 rocker (frame member) 26 rocker inner 28 gusset (reinforcing member) 28A vehicle width direction inner end 28B vehicle width direction outer end 30 center pillar inner 31 retractor mounting opening 32 rear floor Pan 34 Bend

Claims (1)

[Claims] 1. A floor pan having a bent portion whose cross-sectional shape viewed from the vehicle width direction is substantially L-shaped, frame members provided at both ends of the floor pan in the vehicle width direction, and an inner side in the vehicle width direction. A lower structure of a vehicle body, comprising: a reinforcing member having an end portion having a substantially L-shaped cross-section and being superposed on the bent portion, and an outer end portion in a vehicle width direction being joined to the skeleton member.