JPH09272400A - Floor structure of electromobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure of an electromobile wherein the strength of a floor panel can be enhanced without using special structural parts. SOLUTION: The floor structure of an electromobile is provided with a floor panel 1 and a fixing portion 1A which is disposed on the floor panel 1 so as to secure seats 23 and 24, and seat belts 34 and 36, wherein, under the floor panel 1, a bottom portion 50 on which a battery 57 for power supply, and a battery container 49 with frame portions 51 and 56 upwardly projecting from the bottom portion 50 are arranged, and the fixing portion 1A is reinforced by the battery container 49.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure of an electric vehicle in which a fixing portion provided for fixing a body holder to a floor panel has improved strength.

[0002]

2. Description of the Related Art FIG. 4 is a schematic perspective view showing a floor structure of a conventional electric vehicle (not shown), and FIG. 5 is a partial sectional view showing a floor structure of a conventional electric vehicle. Arrow A in FIG. 4 indicates the front of the electric vehicle, and arrow B indicates the rear of the electric vehicle. A fixing portion 10 formed by bending the floor panel 100 upward is formed substantially at the center of the floor panel 100.
0A is provided. The fixed portion 100A is the rising portion 101.
A and 101B, and a flat portion 101C connecting the upper ends of the rising portions 101A and 101B are provided. The bending strength of the floor panel 100 is increased by the fixing portion 100A.

A seat (body holder) 102 is provided on the upper side of the floor panel 100, and inner rails 103 are fixed to both sides of the seat 102 in the front-rear direction. In FIG. 5, for convenience, only one inner rail 103 of each seat 102 is shown. A buckle 104 is fixed to the side surface of the inner rail 103, and a tongue plate 130 attached to a seat belt (body holder) 105 is attached to the buckle 104.

On the other hand, L-shaped brackets 106 are fastened and fixed by bolts 107 and nuts 110 on the indoor side of the rising portions 101A and 101B, respectively. A long outer rail 1 is provided on the upper surface of the bracket 106.
08 is fixed along the front-back direction. The outer rail 108 is formed in a C-shaped cross section, and its opening is directed upward. A part of the inner rail 103 is inserted into the opening of the outer rail 108, and the inner rail 103 is movably held along the outer rail 108. In this way, the seat 102 is configured to be movable according to the body of the occupant, and the seat 102 is stopped at a predetermined position by an adjuster (not shown).

A reinforcing plate 109 formed by bending along the shape of the lower surface of the floor panel 100 is fixed by spot welding to the outdoor side of the floor panel 100, that is, the lower surface of the fixing portion 100A. The reinforcing plate 109 includes a pair of flat portions 111 and 112, rising portions 113 and 114 that are raised from opposite side edges of the flat portions 111 and 112, and a top plate portion 115 that connects the upper ends of the rising portions 113 and 114. It consists of and. A shaft hole (not shown) is provided in each of the rising portions 113 and 114, and the bolt 10 is inserted in the shaft hole.
7 is inserted and fastened integrally with the bracket 106.

In the above structure, when the occupant of the electric vehicle is wearing the seat belt 105 and is running, when the occupant's weight is suddenly moved forward A due to the rapid deceleration, the occupant is moved by the seat belt 105. It is restricted and the posture on the sheet 102 is maintained. At this time, the weight shift acts as a tensile load on the seat belt 105, and the tensile load is transmitted to the floor panel 100 and the reinforcing member 109 via the inner rail 103, the outer rail 108, the bracket 106, and the bolt 107.
Finally, the floor panel 100 and the reinforcing member 109 receive the tensile load.

[0007]

However, the conventional floor structure has a problem that the electric vehicle becomes heavy because the reinforcing plate 109 which is a special component is used to receive the tensile load. .

The present invention has been made in view of the above circumstances, and when the electric vehicle decelerates rapidly and the weight of the occupant moves, the tension transmitted to the fixed portion of the floor panel via the body holder. It is an object of the present invention to provide a floor structure of an electric vehicle that can improve the strength against a load and can receive a tensile load without using a special component. This purpose is achieved by transmitting the tensile load that acts on the floor panel to the battery storage box that stores the battery for the power source, and distributing the tensile load to the entire battery storage box and receiving it by the entire floor panel. To be done.

[0009]

In order to achieve the above object, the invention described in claim 1 is a floor panel and a fixing for fixing a body holder provided on the floor panel. In a floor structure of an electric vehicle including a portion, a battery storage box having a bottom portion supporting a battery for a power source and a frame portion projecting upward from the bottom portion is arranged on the lower side of the floor panel, The battery storage box is characterized in that the fixing portion is reinforced.

Therefore, according to the first aspect of the present invention, the strength (rigidity) of the fixing portion for fixing the body holder to the floor panel is reinforced by the battery storage box, so that the electric vehicle is drastically changed. When the weight of the occupant shifts due to deceleration, the weight shift is transmitted as a tensile load to the fixed portion via the body holder, and this tensile load is dispersed to the frame and bottom of the battery storage box. In addition, the inertial force due to the battery weight gives a reinforcing effect equivalent to that when the reinforcing plate is set. For this reason, it is possible to effectively prevent deformation such that the fixing portion is lifted up without providing a special component for reinforcing the fixing portion, the number of parts of the electric vehicle as a whole is suppressed, and the weight is light. Can be realized.

According to the second aspect of the present invention, the planar shape of the frame portion is formed in a lattice shape, and the connecting member for connecting the fixed portion and the intersection of the frame portion is provided. Characterize.

Therefore, according to the invention described in claim 2, the same effect as in claim 1 can be obtained, and since the fixed portion and the intersection of the lattice-shaped frame portion are connected by the connecting member, The tensile load transmitted from the fixed portion to the frame portion via the connecting member is dispersed in all directions, and the dispersion efficiency is improved. Therefore, the relaxation function for stress concentration is further improved.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described more specifically with reference to the drawings. The present invention is applied to an electric vehicle (not shown) that travels by the driving force of a motor or a motor generator. An internal combustion engine is installed separately,
An electric vehicle of a type in which this internal combustion engine and a motor or a motor generator are used together may be used.

FIG. 1 is a schematic perspective view showing the construction of a floor panel 1 attached to an electric vehicle, in which the arrow C direction indicates the front of the electric vehicle and the arrow D direction indicates the rear of the electric vehicle. The plane shape of the floor panel 1 is integrally formed into a substantially rectangular shape. The floor panel 1 is provided with a fixed portion 1A that is formed by bending to fix a body holder described later to the floor panel 1 in the front-rear direction. The fixed portion 1A includes a pair of flat portions 2 and 3. The flat portions 2 and 3 have a pair of rising portions 4 and 5 which are raised from the opposite side edges to the same height, and a flat connecting portion 6 which connects the upper ends of the rising portions 4 and 5.

A plurality of holes, in the illustrated embodiment, four holes 7 and 8 are provided in the rear half of the flat portions 2 and 3 along the front-rear direction. The holes 7 and 8 are set to have the same arrangement position in the front-rear direction. Further, a plurality of holes 9 and 10 are provided in the upright portions 4 and 5 along the front-rear direction, and four holes are provided in the illustrated embodiment. The arrangement positions of the holes 9 and 10 in the front-rear direction are set to be the same as the arrangement positions of the holes 4 and 5 in the front-rear direction.

FIG. 2 shows the floor structure of the electric vehicle in this embodiment, and is a sectional view taken along the line I--I of FIG. The rocker panels 11 and 12 provided on both sides of the floor panel 1 include outer plates 13 and 14 and inner plates 15 and 16, respectively.
It is formed by joining and fixing. The inner plates 15 and 16 are provided with horizontal support portions 17 and 18 provided along the front-rear direction, and the side edges of the flat portions 2 and 3 of the floor panel 1 are spotted on the upper surfaces of the support portions 17 and 18, respectively. It is fixed by welding.

On the outer ends of the supporting portions 17 and 18, there are provided upright portions 19 and 20 which are raised almost vertically. The upright portions 19 and 20 are provided with a plurality of brackets at predetermined intervals along the front-rear direction. 21 and 22 are fixed. Bracket 2
Reference numerals 1 and 22 are bent and formed in an L shape, one component piece thereof is welded and fixed to the upright portions 19 and 20, and the other component piece projects substantially horizontally above the floor panel 1.

On the other hand, seats (body holders) 23, 24 are provided on the upper side of the floor panel 1, that is, on the indoor side. Long frames 25 and 26 are provided on both sides of the seat 23 along the front-rear direction.
In the lower part of the inner rail 27, 28 having an inverted T-shaped cross section.
Is provided. Then, the frame 26 on the connecting portion 6 side
A buckle 33 is attached to the side surface of the buckle 33, and a tongue plate 34A attached to a seat belt (body holder) 34 is attached inside the buckle 33.

Further, elongated frames 29 and 30 are provided on both sides of the other seat 24 along the front-rear direction, and inner rails 31 and 32 having an inverted T-shaped cross section are provided below the frames 29 and 30, respectively. Is provided. A buckle 35 is attached to the side surface of the frame 29 on the connecting portion 6 side, and a tongue plate 36A attached to the seat belt 36 is attached inside the buckle 35.

The rising portions 19 of the rocker panels 11 and 12,
L-shaped brackets 21 and 22 are provided at 20, and brackets 41 and 42 bent in a crank shape are fixed to the brackets 21 and 22. The brackets 41 and 42 are fastened and fixed by a bolt 43 and a nut 44, respectively. Brackets 45 and 46 bent in an L shape are provided on the indoor side surfaces of the rising portions 4 and 5.
Are fixed along the longitudinal direction. The brackets 45 and 46 are each composed of a vertical portion and a horizontal portion, and are fastened and fixed to a hole provided in the vertical portion by a bolt (connection member) 47 and a nut (connection member) 48.

The outer rail 37 is fixed to the upper surface of the bracket 41, the outer rail 38 is fixed to the upper surface of the bracket 45, the outer rail 39 is fixed to the upper surface of the bracket 46, and the outer rail 40 is fixed to the upper surface of the bracket 42. It is fixed. Outer rail 3
7, to 40 have a substantially C-shaped cross-section, the opening of which is directed upward, and the outer rails 37 to 40 are supported substantially horizontally along the front-rear direction. Inner rails 27, 28, 31, 32 are inserted into the outer rails 37, 40 through their openings so that the seats 23, 24 are movable in the front-rear direction. In addition,
The seats 23 and 24 are stopped at arbitrary positions by an adjuster (not shown).

On the other hand, a battery storage box 49 is provided below the floor panel 1 (outside the room). The battery storage box 49 has a plate-shaped bottom portion 50 formed in a substantially rectangular planar shape, and plate-shaped frame portions 51 to 54 protruding upward from the four sides of the bottom portion 50. Then, the frame portion 51 and the frame portion 5
The facing surface of the frame 3 is connected to the frame 5 by the frame 55.
The surface facing 4 is connected by a frame 56.

Since the frame 55 and the frame 56 intersect each other, the planar shape thereof is formed in a substantially lattice shape, and the intersection of the frames 51 and 54 has a hole penetrating vertically. 58 is provided. Then, the frame portion 52,
The number and the positions of the holes 58 provided in the hole 54 are set to be the same as the number and the positions of the holes 7 and 8 of the floor panel 1.

A battery 57 is housed in a space E surrounded by the frame portions 51, 56, and 56 and the bottom portion 50 thus constructed. The battery storage box 49 is formed of a material that can withstand the weight of the battery 57, such as metal. Further, the battery 57 is connected to a motor (not shown) and a motor generator (not shown) mounted on the electric vehicle.

A bolt (connecting member) 59 is inserted into the hole 58 of the battery storage box 49 from below.
Is exposed above the floor panel 1 through the holes 7 and 8 of the floor panel 1, and a nut (connection member) 60 is attached to the tip of the bolt 59. Further, bolts 59 are also provided in holes 58 provided in the frame 55 of the battery storage box 49.
Is inserted. Brackets (connecting members) 61 and 62 that are bent and formed in an L shape are provided on the frame portion 55 so as to correspond to the holes 58, and bolts 59 are provided in the holes provided in the horizontal portions of the brackets 61 and 62. Inserted and nut 60
It is fixed by tightening.

On the other hand, holes 63 are formed in the vertical portions of the brackets 61 and 62 as shown in FIG. 3, and the vertical portions are in contact with the surfaces of the rising portions 4 and 5 on the outdoor side. Then, the bolt 47 is inserted into the hole 63 in the vertical portion,
It is tightened by the nut 48. Although the inner rails 39, 40 and the brackets 42, 46, 62 corresponding to the one seat 24 are shown in FIG. 3 for convenience, the inner rail 3 corresponding to the other seat 23 is shown.
7, 38 and brackets 41, 45, 61 are configured symmetrically with these.

That is, the brackets 45, 46, 61, 6
2 is integrally fastened and fixed to the rising portions 4 and 5 by a bolt 47 and a nut 48 which are common. Further, the battery storage box 49 is held in a state of being hung below the floor panel 1 by bolts 59, and
The tips of 1, to 54, that is, almost the entire upper surface is in contact with the lower surface of the floor panel 1.

In the above structure, when the occupant of the electric vehicle is wearing the seat belts 34 and 36 and is traveling, if the weight of the occupant moves forward C due to the rapid deceleration of the electric vehicle, the seat belt 34, 36 supports the occupant's body to maintain its posture. When the weight is moved, a tensile load acts on the seat belts 34, 36, and the tensile load is transmitted to the inner rails 25, 26, 29, 30. The tensile load transmitted to the inner rails 25, 30 is transmitted to the rocker panels 11, 12 via the outer rails 37, 40.

On the other hand, the tensile load transmitted to the inner rails 26, 29 is transmitted diagonally forward to the rising portions 4, 5 of the floor panel 1 via the outer rails 38, 39, brackets 45, 46 and bolts 47. To be done. Here, the fixed portion 1A of the floor panel 1 is a battery storage box 49.
Since it is reinforced by and the strength (rigidity) is improved,
The tensile load is applied via the bolt 59 to the battery storage box 49.
The whole, that is, the bottom portion 50 and the frame portions 52 and 54 are dispersed and received by the entire lower surface of the floor panel 1,
The inertial force due to the weight of the battery 57 provides a reinforcing effect equivalent to that when the reinforcing plate is set.

Therefore, it is possible to effectively prevent the fixing portion 1A from being deformed such that the fixing portion 1A is lifted upward without providing any special component parts, and the number of parts of the electric vehicle as a whole is suppressed to achieve weight reduction. be able to.

The hole 58 into which the bolt 59 is inserted is
Since it is provided at the intersection of the frame portions 51, 53, 55, 56, the tensile load transmitted to the bolt 59 is dispersed in all directions, and the dispersion efficiency is improved. Therefore, the relaxation function for stress concentration is more excellent.

In this embodiment, the brackets 45,
Although four 46, 61, 62 are provided in the front-rear direction corresponding to the holes 9, 10, respectively, it goes without saying that those integrally formed in the front-rear direction may be used. Further, in this embodiment, the buckles 33 and 35 are attached to the frames 26 and 29.
The buckles 33 and 35 are directly fixed to the side surface of the floor panel 1 by a connecting member such as a bolt.
A configuration of fixing to A may be adopted.

[0033]

As described above, according to the invention described in claim 1, the strength (rigidity) of the fixing portion for fixing the body holder to the floor panel is reinforced by the battery storage box. When the electric vehicle suddenly decelerates and the weight of the occupant shifts, the weight shift is transmitted as a tensile load to the fixed portion through the body holder, and this tensile load is transmitted to the frame portion of the battery storage box. In addition to being distributed to the bottom, the inertial force due to the weight of the battery gives a reinforcing effect equivalent to that when the reinforcing plate is set.

Therefore, it is possible to effectively prevent the fixing portion from being deformed such that the fixing portion is lifted up without providing any special component for reinforcing the fixing portion, and the number of parts of the electric vehicle as a whole is suppressed. Therefore, the weight can be reduced.

According to the invention described in claim 2, the same effect as in claim 1 can be obtained, and in addition, since the fixed portion and the intersection of the lattice-shaped frame portion are connected by the connecting member, The tensile load transmitted from the fixed portion to the frame portion via the connecting member is dispersed in all directions, and the dispersion efficiency is improved. Therefore, the relaxation function for stress concentration is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a floor structure of an electric vehicle according to the present invention.

FIG. 2 is a sectional view taken along the line II of FIG. 1, showing a floor structure of the electric vehicle according to the present invention.

FIG. 3 is an exploded perspective view showing main components of the floor structure of the electric vehicle according to the present invention.

FIG. 4 is a perspective view showing a schematic configuration of a floor structure of an electric vehicle in a conventional example.

FIG. 5 is a sectional view showing a main part of a floor structure of an electric vehicle in a conventional example.

[Explanation of symbols]

 1 Floor Panel 49 Battery Storage Box 50 Bottom 57 Battery 51, ~ 56 Frame

Claims (2)

[Claims] 1. A floor structure of an electric vehicle, comprising: a floor panel; and a fixing portion provided on the floor panel and for fixing a body holder, wherein a power source is provided below the floor panel. A battery storage box having a bottom portion that supports the battery and a frame portion that projects upward from the bottom portion, and the fixed portion is reinforced by the battery storage box. . 2. The electricity according to claim 1, wherein the frame portion is formed in a grid shape in a plan view, and a connecting member for connecting the fixing portion and an intersection of the frame portion is provided. Car floor structure.