JP3070353B2 - Body floor 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 floor structure, and more particularly to a vehicle body floor structure of an electric vehicle powered by a battery.

[0002]

2. Description of the Related Art In an electric vehicle, a vehicle-mounted battery occupies a considerable weight and a mounting space. Therefore, as shown in, for example, Japanese Patent Application Laid-Open No. 5-208617, a dedicated battery is provided below the floor panel. Is provided, and a plurality of batteries are mounted and stored on the battery frame.

[0003]

If a collision input acts from one side during a side collision of the vehicle, the battery frame may be deformed and interfere with the battery.

Accordingly, the present invention provides a vehicle body floor structure capable of avoiding deformation of a battery frame at the time of a side collision of a vehicle and protecting a battery safely.

[0005]

A battery frame is connected to a floor member which is joined and disposed on a lower surface of a floor panel and extends in the vehicle longitudinal direction and the vehicle width direction, and a battery is mounted on the battery frame. The battery is sealed and stored between a floor panel and a battery frame, and a power collection and distribution reinforced by an outer case is provided inside a floor tunnel formed at the center of the floor panel in a vehicle longitudinal direction. A floor cross member joined to the floor panel surface and arranged in the vehicle width direction with the floor tunnel portion in the middle in the arrangement area of the controller unit. It is joined across the side wall of the floor tunnel and the floor member on the side of the floor panel.

[0006]

When a collision input acts on one of the floor cross members from one side via the floor member side portion of the floor panel at the side collision of the vehicle, the controller unit in the floor tunnel portion functions as a rigid input transmission system. Therefore, the collision input is transmitted to the other floor cross member and the floor member side part via the floor tunnel unit and the controller unit, and the collision input is distributed and burdened on the entire floor components.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, in which the same reference numerals are given to the same parts as in the above-mentioned conventional construction.

FIG. 12 shows the overall structure of one embodiment of the present invention, wherein 1 is a floor panel, 5 is a floor member joined to the lower surface of the floor panel 1 to form a floor frame member, , A pair of cross members 7, 8, 9, which are connected across the side members 6, 6 and extend in the vehicle width direction; The gusset member 10 is connected to the outside of the side members 6 and 6 via a plurality of outriggers 11a.
It is composed of each skeletal member such as a side sill 11 extending in the vehicle longitudinal direction.

Reference numeral 12 denotes a bottomed battery frame on which a plurality of batteries 16 are mounted. The front frame 13, the side frames 14 on both sides, and the rear frame 15 are connected to the cross member 7 of the floor member 5 and the side members 6 on both sides. , The gusset member 10 and the cross member 8 are connected to the lower surfaces of the cross members 8 by bolts and nuts via sealing members (not shown) so that the battery 16 is sealed and stored between the floor panel 1 and the battery frame 12. I have to.

Here, an inner case 21 made of a metal panel material is reinforced inside a floor tunnel portion 2 formed in the center part of the floor panel 1 in the longitudinal direction of the vehicle body as shown in FIGS. A controller unit 20 for power collection and distribution is provided.

The controller unit 20 includes flanges 21 a formed on both sides of a lower bottom edge of the outer case 21.
The lower surface of the mounting bracket 22 joined to the corners on both sides of the lower portion of the floor tunnel portion 2 is overlapped and connected by bolts and nuts 23.

The floor cross members 3 and 3 joined to the floor panel 1 and arranged in the vehicle width direction with the floor tunnel 2 in the middle are disposed in the area where the controller unit 20 is disposed. The side wall 2a of the floor tunnel 2 and the floor member on the side of the floor panel 1, specifically, the side sill 11, are joined together.

The ends of the floor cross members 3 and 3 on the floor tunnel section 2 side are connected to the controller unit 2.
0 so that the load is transmitted from one floor cross member 3 to the other floor cross member 3 via the controller unit 20 reliably and smoothly. It is good to keep it.

According to the structure of the above-described embodiment, at the time of a side collision of the vehicle, one side is provided from one side via the floor member side portion (side sill 11, outrigger 11a, side member 6, etc., see FIG. 12). When a collision input acts on the floor cross member 3, the controller unit 20 disposed inside the floor tunnel unit 2 functions as a rigid input transmission system, and the collision input is transmitted via the floor tunnel unit 2 and the controller unit 20. The input is transmitted to the other floor cross member 3 and the floor member side portion.

Therefore, the side wall 2 of the floor tunnel 2
a is not crushed, floor panel 1 and floor member 5
Of course, the collision input can be distributed and borne by the entire floor component such as the battery frame 12 connected to the floor member 5.

As a result, it is possible to suppress the floor cross member 3 and the floor member side portion from being deformed and moved toward the center of the floor due to the crush deformation of the side wall 2a of the floor tunnel portion 2. 12
, The battery 16 can be safely protected.

FIGS. 3 and 4 show a second embodiment of the present invention. In the upper part of the outer case 21 of the controller unit 20, a portion which is coaxial with the left and right floor cross members 3 and 3 in plan view is shown. A brace 24 having an inverted hat shape in cross section is joined in the vehicle width direction, and a closed cross section 25 is formed in the upper portion of the outer case 21 so as to be substantially coaxial with the floor cross members 3 and 3 in plan view.

Therefore, according to this embodiment, the rigidity of the outer case 21 is increased by the closed cross-section 25, and the transmission of the collision input between the floor cross members 3 can be satisfactorily performed.

In this embodiment, the height of the outer case 21 is increased in order to form the closed cross section 25. However, if there is sufficient space in the upper part of the outer case 21, the floor may be used. With the same height as the cross members 3, 3, the closed section 25 can be configured at the same height position without offsetting the closed cross section 25 from the floor cross members 3, 3 in the vertical direction.

FIGS. 5, 6 and 7 to 11 show the third and fourth embodiments of the present invention. These embodiments are also designed for the purpose of continuous transmission of collision input.

In the third embodiment shown in FIGS. 5 and 6,
In the upper portion of the floor tunnel portion 2, a brace 26 having an inverted hat-shaped cross section is joined to a portion coaxial with the left and right floor cross members 3 and 3 in plan view in the vehicle width direction. A closed cross section 27 is formed substantially coaxially with the floor cross members 3 and 3 in plan view.

In this embodiment, in order to avoid interference between the brace 26 and the outer case 21 of the controller unit 20, the upper part of the outer case 21 is provided with a brace 26
Is formed.

The ends of the floor cross members 3 and 3 extend slightly upward so as to straddle the closed cross section 27 so as to increase the efficiency of force transmission.

Therefore, according to this embodiment, the controller unit 20 and the closed section 27 of the floor tunnel section 2 form a rigid input transmission system, and
The input transmission between the three can be continuously and satisfactorily performed.

In the fourth embodiment shown in FIGS. 7 to 11, the mounting bracket 2 of the controller unit 20 is used.
8 is formed in a hat-shaped cross-section that joins substantially along the inner side surface shape of the floor tunnel portion 2, and a concave portion 28a is formed in the center of the upper surface portion in the vehicle width direction to form the upper wall 2b of the floor tunnel portion 2. Between the left and right floor cross members 3,3
And a closed cross-section portion 29 which is coaxially connected in plan view.

Further, a reinforcing bead 30 is expanded toward the vehicle cabin from the side wall 2a of the floor tunnel portion 2 to the floor panel 1 at a position substantially at the center of the joint arrangement portion of the floor cross members 3 and 3. It is formed so that the closed cross section 29 and the reinforcing bead 30 are continuous.

Therefore, in the fourth embodiment, similarly to the third embodiment, the controller unit 20 and the portion where the closed section 29 of the floor tunnel 2 and the reinforcing bead 30 are formed form a rigid input transmission system. Thus, input transmission between the floor cross members 3 and 3 can be continuously and satisfactorily performed.

[0028]

As described above, according to the present invention, it is possible to arrange the controller unit as a rigid input transmission system in the floor tunnel to transmit the input between the left and right floor cross members at the time of a side collision. Therefore, the crush deformation of the side wall of the floor tunnel portion can be eliminated, and the collision input can be dispersed and burdened on the entire floor component.

As a result, the battery can be safely protected by avoiding inward deformation of the floor member side portion and the battery frame due to the crushing deformation of the side wall of the floor tunnel portion.

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a schematic perspective view of a controller unit according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a schematic exploded perspective view of a third embodiment of the present invention.

FIG. 7 is a perspective explanatory view showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

FIG. 9 is an exploded perspective view of FIG. 8;

FIG. 10 is a sectional view taken along the line CC of FIG. 8;

FIG. 11 is a sectional view taken along the line DD in FIG. 8;

FIG. 12 is an exploded perspective view showing the entire structure of one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor panel 2 Floor tunnel part 2a Side wall of floor tunnel part 3 Floor cross member 5 Floor member 12 Battery frame 16 Battery 20 Controller unit 21 Outer case

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 25/20

Claims (1)

(57) [Claims] Claims: 1. A floor panel is joined to a lower surface of a floor panel,
A battery frame is coupled to a floor member extending in the vehicle longitudinal direction and the vehicle width direction, a battery is mounted on the battery frame, and the battery is sealed and stored between the floor panel and the battery frame. A controller unit for power collection and distribution reinforced by an outer case is arranged inside a floor tunnel formed in the front and rear direction of the vehicle body at the center of the floor panel, while being joined to the floor panel surface. A floor cross member that is arranged opposite to the vehicle width direction with the floor tunnel part in the middle,
A vehicle body floor structure, wherein the controller unit is provided in a region where the controller unit is provided, and is joined to a side wall of the floor tunnel and a floor member on a side of a floor panel.