JPH11255145A - Vehicular floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure as wide as possible of a compartment space as well as to maintain good floor rigidity. SOLUTION: The vehicular floor structure includes a floor center member 10 arranged on a plurality of cross members 18, 20, 22 separately provided in the longitudinal direction of a vehicle. The floor center member 10 is formed of an extrusion molding material of a flat semicylindrical shape or an equal leg trapezoid with a hollow and closed cross section and includes a plural number of ribs 30 separately provided in the width direction and integrally connecting an upper wall 28 and a lower wall 26 together. The floor center member 10 is practically extending from a toe board 14 to a rear floor 16. The floor center member 10 also includes a pair of flanges 10A on the periphery on both sides to receive the periphery of a floor panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In a vehicle such as an automobile, for example, as described in Japanese Patent Application Laid-Open No. Hei 6-339789, in order to secure the rigidity of the floor of the vehicle, a floor panel generally has a center in a lateral direction of the vehicle. The portion is provided with a tunnel portion extending in the vehicle front-rear direction and having a substantially U-shaped or U-shaped cross section and rising upward.

[0003]

According to such a floor structure, the rigidity of the floor can be ensured without excessively increasing the plate pressure of the floor panel, but the tunnel portion is formed in an upwardly raised form. Therefore, there is a problem that the space in the vehicle compartment becomes narrower, and in particular, in the case of a passenger car, the place and method of placing the feet of the vehicle occupant are restricted. In addition, if the raised height of the tunnel portion is reduced to eliminate or alleviate such a problem, sufficient rigidity of the floor cannot be secured.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional floor structure in which a tunnel portion is provided on a floor panel. It is an object of the present invention to secure as large a vehicle interior space as possible while maintaining good floor rigidity by securing the rigidity of the floor with members.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a main object of the present invention is to provide a vehicle comprising: a plurality of cross beams which are arranged in a longitudinal direction of a vehicle; The floor center member has a hollow closed cross-sectional shape, and has a rib for integrally connecting an upper wall and a lower wall, which is achieved by a vehicle floor structure. You.

According to the configuration of the first aspect, the floor center member extending in the front-rear direction of the vehicle is disposed on the plurality of cross members spaced apart in the front-rear direction of the vehicle, and the floor center member is a hollow closed member. Since it has a cross-sectional shape and has ribs for integrally connecting the upper wall and the lower wall, it is possible to sufficiently increase the rigidity of the floor center member without increasing the height of the floor center member. In addition to securing high floor rigidity, the interior space of the vehicle can be increased as compared with a conventional floor structure in which a tunnel portion is provided on a floor panel.

Further, according to the present invention, in order to effectively achieve the above-mentioned main object, in the above-mentioned structure of the first aspect, the floor center member is formed of an extruded material. Configuration).

According to the second aspect of the present invention, since the floor center member is formed by extruded material, the floor center member having the upper wall, the lower wall, and the rib for integrally connecting these members can be easily and efficiently used. It can be manufactured well, thereby improving the productivity of the floor portion of the vehicle and reducing the manufacturing cost.

According to the present invention, in order to effectively achieve the above-mentioned main object, in the above-mentioned structure of the first aspect, the floor center member extends substantially from the toeboard portion to the rear floor portion. This is configured (the configuration of claim 3).

According to the third aspect of the present invention, since the floor center member extends substantially from the toeboard portion to the rear floor portion, the tunnel portion of the floor panel extends only from the toeboard portion to the front of the rear floor portion. It becomes possible to increase the rigidity of the floor structure as compared with the case of the conventional general floor structure.

[0011]

According to a preferred aspect of the present invention, in the above-mentioned structure, the floor center member has a flat lower wall and an upwardly convex substantially arcuate or equal leg. It has a trapezoidal cross-sectional shape, has a lower wall and an upper wall integrally connected at both side edges, and is configured so as to have a flat, semicylindrical shape or an isosceles trapezoidal shape as a whole (preferred embodiment 1).

According to another preferred aspect of the present invention, in the configuration of the first aspect, the rib is configured to extend over substantially the entire length of the floor center member (preferred aspect 2). .

According to another preferred aspect of the present invention, in the configuration of the first aspect, the floor center member is configured to have a plurality of ribs spaced apart from each other in a width direction thereof ( Preferred embodiment 3).

According to another preferred embodiment of the present invention, in the configuration of the preferred embodiment 1, the lower wall has a larger width than the upper wall, and the floor center member is formed by both side edges of the lower wall. It is configured to have a pair of flanges that are defined and receive the edge of the floor panel (preferred embodiment 4).

According to another preferred embodiment of the present invention, in the above construction, the floor center member and the cross member are made of a light alloy extruded material, and the floor center member is formed of It is configured to be fixed to the cross member by arc welding (preferred mode 5).

According to another preferred embodiment of the present invention, in the configuration of the preferred embodiment 4, the floor center member is disposed substantially at the center between the left and right floor under reinforcements, and The floor panel is provided so as to extend between the flange portion and the left and right floor under reinforcements (preferable embodiment 6).

According to another preferred embodiment of the present invention, in the above-mentioned preferred embodiment 6, each floor panel is configured to extend from the toeboard portion to the rear floor portion (preferred embodiment 7).

According to another preferred embodiment of the present invention, in the configuration of the preferred embodiment 6, each floor panel is formed of a light alloy, and a flange portion of the floor center member and left and right floor under reinforcements. Is fixed by spot welding (preferred mode 8).

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a preferred embodiment of the present invention.

FIG. 1 is a perspective view showing an embodiment of a floor structure according to the present invention, FIG. 2 is an enlarged partial perspective view showing the floor center member shown in FIG. 1, and FIG.
FIG. 4 is an enlarged partial cross-sectional view along the line III, and FIG.

In these figures, reference numeral 10 denotes a floor center member, and reference numeral 12 denotes left and right floor under reinforcements extending in the longitudinal direction of the vehicle. The floor center member 10 extends in the vehicle front-rear direction from the toeboard portion 14 to the rear floor portion 16 at the center between the left and right floor under reinforcements 12, and a front cross member 18 connected to the floor under reinforcement 12 at both ends. , The center cross member 20 and the rear cross member 22. A pair of outer front cross members 24 are provided on both sides of the front cross member 18 in alignment therewith.

In the illustrated embodiment, a floor center member 10, a floor under reinforcement 12,
Each of the cross members 18 to 22 and the outer cross member 24 are formed by extrusion from an aluminum alloy. The floor center member 10 has a flat plate-like lower wall 26.
And an upper wall 28 which is upwardly convex and has an upper wall 28 integrally connected to the lower wall at both side edges, and has a substantially flat, semi-cylindrical hollow closed cross-sectional shape as a whole. It has a constant cross-sectional shape throughout.

The lower wall 26 has a larger width than the upper wall 28, so that the floor center member 10 has a pair of flange portions 10A on both side edges. The upper wall 28 and the lower wall 26 are integrally connected to each other by a plurality of ribs 30 which are spaced apart from each other in the width direction and extend in the vertical direction.
Each rib extends in the vehicle front-rear direction over the entire length of the floor center member 10.

Also, floor under reinforcement 1
2 has a rectangular or inverted leg-shaped trapezoidal closed cross-sectional shape having a pair of flange portions 12A on both sides, and each of the cross members 18 to
Each of the outer cross member 22 and the outer cross member 24 has a rectangular or upwardly-opened trapezoidal open cross-sectional shape having a pair of flange portions 18A, 20A, 22A, 24A on both sides. The rear floor portion 16 is slightly higher than the front floor portion 32, and the floor center member 10 and the floor under reinforcement 12 are slightly upwardly inclined from the front floor portion 32 to the rear floor portion 16.

The floor center member 10 is integrally connected to the cross members 18 to 22 at the lower wall 26 by arc welding, and the cross members 18 to 22 are integrally connected to the floor under reinforcement 12 at both ends by arc welding. Have been. The outer cross member 24 is integrally connected to the floor under reinforcement 12 at the inner end by arc welding, and is integrally connected to the floor side member 34 at the outer end by arc welding. In the illustrated embodiment, the floor side member 34 is also formed by extrusion from an aluminum alloy.

As shown in detail in FIG. 4, an inner floor panel 36 is provided between the flange portion 10A of the floor center member 10 and the flange portion 12A of the floor under reinforcement 12, and a floor under reinforcement is provided. An outer floor panel 38 extends between the flange 12A of the ment 12 and the flange 34A of the floor side panel 34. The inner floor panel 36 and the outer floor panel 38 are formed of an aluminum alloy plate.
It is fixed to the corresponding flange portion by spot welding at both side edges, and is connected at the front end to a toe board (not shown) by spot welding.

Thus, according to the illustrated embodiment, the floor center member 10 is formed of an extruded material having a substantially flat semi-cylindrical hollow closed cross section, and the upper wall 28 and the lower wall 26 are formed in the width direction. Are connected to each other by a plurality of ribs 30 which are spaced apart from each other and extend in the vertical direction. Each rib extends over the entire length of the floor center member 10, so that the height of the floor center member is increased. Without doing so, sufficient rigidity of the floor center member can be ensured, thereby securing a large vehicle interior space as compared with the related art while ensuring good floor rigidity of the vehicle.

In particular, according to the illustrated embodiment, the floor center member 10 has an extruded hollow closed cross-sectional shape in which an upper wall 28 and a lower wall 26 are integrally connected by a plurality of ribs 30 extending vertically. Since the floor center member is formed of a molding material, the floor center member can be manufactured easily and efficiently as compared with the case where the floor center member is manufactured by another method, thereby improving the productivity of the floor structure. Manufacturing costs can be reduced.

According to the illustrated embodiment, the upper wall 28 and the lower wall 26 of the floor center member 10 have a plurality of ribs 3.
0, the ribs 30 extend in the vehicle front-rear direction over the entire length of the floor center member 10, so that no ribs are provided or the ribs extend only a part of the entire length of the floor center member 10. Compared with the case, the strength and rigidity of the floor center member can be increased.

According to the illustrated embodiment, the floor center member 10 extends in the vehicle front-rear direction from the toe board portion 14 to the rear floor portion 16 at the center of the vehicle, and includes a front cross member 18, a center cross member 20, a rear cross member. Since they are arranged on the members 22 and fixed to them by arc welding, the floor rigidity of the vehicle is reduced as compared with the case where the floor center member 10 extends only from the toe board portion 14 to the center cross member 20, for example. It can be further improved.

According to the illustrated embodiment, the lower wall 26 has a larger width than the upper wall 28, so that the floor center member 10 has a pair of flange portions 10A on both side edges, and the flange portion 10A Since the inner edge of the inner floor panel 36 is fixed, the inner edge of the inner floor panel can be reliably supported, and there is no need to separately provide a means for supporting the inner edge of the inner floor panel.

Further, according to the illustrated embodiment, the floor center member 10, the floor under reinforcement 1,
2, each cross member 18-22, outer cross member 2
4. The floor side member 34 is formed of an extruded material made of an aluminum alloy, and the inner floor panel 36 and the outer floor panel 38 are formed of an aluminum alloy plate. It is possible to reduce the weight of the vehicle as compared with the case.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to the above-described embodiments, and various other embodiments are within the scope of the present invention. It will be clear to those skilled in the art that is possible.

For example, in the above embodiment, the upper wall 28 of the floor center member 10 has an upwardly convex bow shape, but the upper wall has an arbitrary shape such as an isosceles trapezoidal shape or an arc. Although the floor center member 10 has a constant cross-sectional shape over its entire length, for example, a part of the floor center member 10 is compressed and deformed in the vertical direction in the rear floor portion 16. May have a different cross-sectional shape from other portions.

In the above embodiment, the floor center member 10 is formed of an aluminum alloy and provided with four ribs 30. The material forming the floor center member is a light alloy other than the aluminum alloy. Or other metal material, and the number of ribs may be set to any number necessary according to the shape and size of the floor center member.

Further, in the above embodiment, the floor center member 10 is moved from the toe board portion 14 to the rear floor portion 1.
6, the floor center member may be configured to extend from the toeboard portion to the middle of the rear floor portion 16 or to the front end of the rear floor portion.

[0037]

As is apparent from the above description, according to the structure of the first aspect of the present invention, the rigidity of the floor center member can be sufficiently increased without increasing the height of the floor center member. Therefore, good floor rigidity can be ensured, and the cabin space can be made wider than in the case of a conventional floor structure in which a tunnel portion is provided on a floor panel.

According to the second aspect of the present invention, the floor center member having the upper wall, the lower wall, and the rib for integrally connecting the upper wall and the lower wall can be easily and efficiently manufactured. And the manufacturing cost can be reduced.

According to the third aspect of the present invention, since the floor center member extends substantially from the toeboard portion to the rear floor portion, the tunnel portion of the floor panel extends only from the toeboard portion to the front of the rear floor portion. The rigidity of the floor structure can be increased as compared with a conventional general floor structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a floor structure according to the present invention.

FIG. 2 is an enlarged partial perspective view showing the floor center member shown in FIG.

FIG. 3 is an enlarged partial sectional view taken along a line III-III in FIG. 2;

FIG. 4 is a cross-sectional view showing a supporting state of the floor panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Floor center member 12 ... Floor under reinforcement 14 ... Toe board part 16 ... Rear floor part 18-24 ... Cross member 26 ... Bottom wall 28 ... Top wall 30 ... Rib 36 ... Inner floor panel 38 ... Outer floor panel

Claims (3)

[Claims] A floor center member disposed on a plurality of cross members spaced apart in the front-rear direction of the vehicle and extending in the vehicle front-rear direction, wherein the floor center member has a hollow closed cross-sectional shape; A floor structure for a vehicle, comprising a rib for integrally connecting an upper wall and a lower wall. 2. The vehicle floor structure according to claim 1, wherein said floor center member is formed of an extruded material. 3. The vehicle floor structure according to claim 1, wherein said floor center member extends substantially from said toeboard portion to a rear floor portion.