JPH05112270A - Battery support device for electric vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] Make it easy to attach and detach the battery. [Structure] A battery frame 12 opened upward is supported by a floor part frame 4 which passes under a step floor 5, and front and rear mounting parts 36 and 45 are provided in front and rear of the battery case 12, and a weld nut 37, 46 is provided. The battery 15 is put in the battery case 12, the fixing member 58 is arranged in the front-rear direction on the upper portion thereof, and the front-rear end portions are attached to the front attaching portion 3.
6 and the rear mounting portion 45, and the battery 15 is fixed by fastening with bolts 61 and 63. As a result, if the step floor 5 is removed, the battery 15 can be quickly removed above the battery case 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery supporting device for an electric vehicle such as an electric scooter, an electric three-wheeled vehicle and an electric four-wheeled vehicle.

[0002]

2. Description of the Related Art The present applicant has already filed Japanese Patent Application No. Hei 2-162242.
I am applying for an electric vehicle as a number. In the example of the present application, a scooter type vehicle body provided with a step floor is provided, and a battery is supported by a floor frame that passes under the step floor in the front-rear direction. It is disclosed to drive a power unit that is a combination of an electric motor pivotally mounted to the rear of the frame and a belt type transmission.

[0003]

By the way, in order to support the battery in the above-described electric vehicle, it is natural that the battery is firmly fixed to the floor frame side so as to withstand vibration during traveling. However, if they are fixed too strongly, it will take time and effort to attach and detach them during replacement or inspection. Therefore, in such a case, it is desired that the battery can be easily attached and detached. The present invention aims to satisfy such a need.

[0004]

According to a first aspect of the present invention, a floor case frame below a step floor supports a battery case opening upward, the battery case is accommodated on the battery case, and the upper part of the battery is stepped. Hold it with a fixing member that extends in the front-rear direction along the bottom surface of the floor,
The front and rear ends of the fixing member are detachably attached to the battery case by connecting members.

According to a second aspect of the invention, in the battery of the first aspect, the bottom portion is elastically supported via an elastic body previously attached to the battery case, and the upper portion is elastically attached to the fixing member in advance. And is elastically supported.

According to the third aspect of the invention, the floor frame is formed of a single member extending in the front-rear direction at the center of the vehicle body, and the battery case for accommodating the battery is supported above or below the floor frame. At the same time, the battery case is characterized by being provided with an inlet / outlet opening to the side of the vehicle body.

The invention of claim 4 is characterized in that the opening / closing port of claim 3 is openably / closably covered by an opening / closing member.

[0008]

According to the first aspect of the present invention, the battery can be taken out above the battery case simply by removing the step floor and subsequently removing the connecting members at two positions before and after the fixing member.

According to the second aspect of the present invention, if the battery is put in the battery case and the upper part is pressed by the fixing member, the bottom side is attached by the elastic member to the battery case.
The upper side is elastically supported by elastic members attached to the fixing member.

According to the third aspect of the present invention, since the floor frame is not provided on the side of the battery case, the battery can be taken in and out from the side of the vehicle body through the take-in / out port of the side of the battery case.

According to the fourth aspect of the invention, when the opening / closing member is opened, the battery can be taken in and out from the side of the vehicle body through the loading / unloading port, and when the opening / closing member is closed after accommodating the battery, the battery cannot be dropped into the battery case. Hold stable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described with reference to FIGS. FIG. 2 is a partially cutaway view showing the shape of the left side surface of the vehicle body of the electric scooter to which this embodiment is applied. In this figure, a steering shaft 2 supporting a front wheel 1 is supported by an upper end of a main frame 3, and a lower end of the main frame 3 extends obliquely downward and is connected to a front end of a floor frame 4. The floor frame 4 is a member that makes a pair of right and left and extends rearward while opening to the side (see FIGS. 3 and 4 described later), and a step floor 5 is detachably fixed to the upper surface thereof by bolts 6. .. The step floor 5 is a portion on which the foot is put during traveling.

A pivot bracket 7 is attached to the rear portion of the floor portion frame 4, and a front end portion of the power unit 8 is rotatably attached to the front portion by a pivot shaft 9. A rear bracket 10 is provided so as to project obliquely forward from the lower end of the pivot bracket 7.

The rear bracket 10 and the main frame 3
The front and rear parts of the battery case 12 are laterally attached to the front bracket 11 extending rearward from the lower end of the battery case 12 by long bolts 13 and 14, respectively. The battery case 12 is opened upward, and the battery 1 is provided inside.
5 are accommodated. A coupler 16 is attached to the side of the battery 15. However, these details will be described later. The side of the battery case 12 is almost covered with the skirt portion 17 of the step floor 5.

A rear portion of the floor frame 4 behind the pivot bracket 7 constitutes a rear frame 18 which continuously extends obliquely upward and rearward, and surrounds this periphery to form a rear cover 19.
Is installed. A seat 20 is provided above the rear cover 19.
Is attached via a hinge 21 so as to be openable and closable, and a storage case 22 capable of accommodating a helmet or the like is provided below the seat 20, and is opened upward with the seat 20 as a lid.

A fan 23, which rotates when the battery 15 is charged, is provided in the lower portion of the bottom of the container 22 in the rear cover 19.
Is provided so as to face the rear end opening of the duct 24. The front end portion of the duct 24 is opened above the rear portion of the battery case 12, and when the battery 15 is charged, the fan 23 rotates and sucks the air inside the battery case 12, so that the inside of the battery case 12 is exposed to the outside air. Is sucked in to cool the battery 15.

The bottom portion 25 of the rear cover 19 extends obliquely upward and rearward so that the inside is substantially sealed, and the exhaust air from the fan 23 and the traveling wind taken in through the opening 26 formed in the front portion of the rear cover 19 are transmitted to the bottom portion 25. It is designed to flow to the rear end portion of the rear cover 19 as shown by the arrow. Therefore, a converter 27 and a controller 28 are arranged inside the rear cover 19 along the bottom portion 25, and a charger 29 is arranged in the space above the controller 28 and behind the container 22.

A lid 30 for a charger is provided on the surface of the rear cover 19 above the charger 29 and behind the seat 20 so as to be freely openable and closable, and at the time of charging, the lid 30 is opened to take out the cord 31 housed therein and turn it to a commercial power source. It is designed to connect. When the lid 30 for the charger is in the closed state, the lid 30 is pressed by the rear end of the seat 20.

FIG. 1 is an enlarged cross-sectional view in the front-rear direction near the battery case 12, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. In addition, FIG. 4 shows a battery case 12 and a battery 1.
5 is a development view of the fan 5, the fan 23, and the duct 24. FIG.

1 and 3 and 4, the battery case 12 has a front wall 32, a rear wall 33 and a side wall 34,
The bracket 3 that allows the long bolt 13 to pass through the lower portion of the front wall 32
5 projects forward, and a mounting portion 36 projects upward in the center of the upper part. A weld nut 37 is attached to the attachment portion 36. A spacer 38 having a U-shaped cross section is provided at the center of the inside of the front wall 32 in the vertical direction with the open portion facing outward, and a sponge plate 39 is provided inside thereof.

A bracket 40 through which the long bolt 14 is inserted is also projected rearward to the lower part of the rear wall 33, and a spacer 41 having a U-shaped cross section is arranged in the center of the inside in the vertical direction with the open portion facing outward. The projection 42 provided at the lower part of the rear wall 3
The inner surface cut-and-raised portion 43 of 3 is connected with a bolt 44. The upper end of the spacer 41 is a mounting portion 45 that is folded back substantially horizontally.
And a weld nut 46 (FIG. 1) is attached thereto. A sponge plate 47 is also arranged vertically on the inner side surface of the battery case of the spacer 41.

The side wall 34 has a slope portion 48 whose lower portion is inclined toward the center of the vehicle body at an angle θ with respect to the horizontal direction (FIG. 3).
Mount mounting holes 49 are formed here at appropriate intervals in the front-rear direction. By providing the slope portion 48, the bank of the vehicle body becomes advantageous.

An inclined portion 51 of a lower mount rubber 50 having a shape that can follow the slope portion 48 and the bottom portion 12a is engaged with the mount mounting hole 49 by a head portion 52 formed at the tip. The inclined portion 51 has the same inclination as the inclined portion 48, and the head 5
2 is formed slightly larger than the mount mounting hole 49. The horizontal portion 53, which is a portion along the bottom portion 12a of the lower mount rubber 50, forms a protruding portion 54 upward, which elastically supports the bottom portion of the battery 15 and protrudes the mounting portion 55 downward, where the bottom portion 12a. Mounting holes 12 that are slightly smaller than the mounting portions 55 formed in the front-rear direction at appropriate intervals
engage with b.

A sponge plate 56 is provided in the center of the bottom portion 12a in the front-rear direction so as to connect the front and rear sponge plates 39 and 47.

As will be described later, the battery 15 is a battery pack which will be described later and is long in the front-rear direction.
One is prepared and arranged in the battery case 12 so as to be long in the left-right direction in the front-rear direction, and a gap 56 is formed in the front-rear direction in an intermediate portion between the two (FIG. 3).

The upper portion of the battery 15 is pressed by a sponge plate 57 and a fixing member 58 provided in the front-rear direction. The fixing member 58 is a member having a U-shaped cross section, and a lower bent portion 59 that overlaps with the mounting portion 36 is formed at the front end portion, and the bolt through hole 60 and the weld nut 37 formed in the lower bent portion 59 are connected to each other. By matching and passing the bolt 61,
The downward bent portion 59 and the mounting portion 36 are fastened together with the bolt 61.

A bolt through hole 6 is also formed at the rear end of the fixing member 58.
2 is formed, and it is fastened with a bolt 63 in line with the weld nut 46 provided on the mounting portion 45 of the spacer 41. An elongated hole 64 is formed in the vicinity of the bolt through hole 62, and an elongated hole 65 having the same shape is also formed in the sponge plate 57 that overlaps therebelow.

A cross member 66 projecting in the left-right direction is provided in the middle of the fixing member 58 at the front and back, and an upper mount rubber 68 is press-fitted from below into mounting holes 67 formed at the left and right ends of the fixing member 58. The upper end portion 69 projects upward and abuts against the inner surface of the step floor 5 so that it can be elastically supported. A lower end portion 70 of the upper mount rubber 68 projects downward from the cross member 66 and fits into an angled front-and-back frame 71 of each battery 15, so that the upper portion of the battery 15 can be elasticized.

As is apparent from FIG. 3, the fixing member 58 is placed on each battery 15, and the front and rear ends thereof are connected to the battery case 12.
When the step floor 5 is placed on the step mount 5 after being fixed upward, the upper end 69 of the upper mount rubber 68 projects upward from the cross member 66 and elastically supports the lower surface of the step floor 5. In this state, the skirt portion 17 of the step floor 5 overlaps the outside of the side wall portion 34 of the battery case 12 with a slight ventilation gap 72 as described above. Further, one collector coupler 16 is provided for each of the left and right batteries 15.

FIG. 5 shows a plane structure on the floor frame side for mounting the step floor. Cross plates 4a are arranged in parallel at two front and rear positions between the left and right floor frames 4, and both ends thereof are It is fastened to the bracket 4b on the floor frame 4 side with bolts 4c. Weld nuts 4d are provided at the left and right ends of each cross plate 4a, and the floor frame 4 is fixed thereto by bolts 6.

As is apparent from FIG. 4, the duct 24 surrounds the central space 73 and separates the air passages into the left and right sides, and the lower portion opens toward the upper rear portion of the battery case 12 and the upper portion of the battery case 12. The rear part is attached to the lower part of the front end of the rear cover 19 by a bolt 74. The rear part of the duct 24 rises upward and enters the space below the step part 22a (FIG. 2) formed at the bottom of the container 22, and the mounting parts 75a formed on the left and right of the top part 75 are attached to the left and right rear parts by the bolts 76. Stay 77 with both ends supported between frames 18
Mounted to. The fan 23 is fitted and attached to the opening 78 formed at the center of the top portion 75 via an elastic member 79.

FIG. 6 is a diagram showing the battery 15 in a simplified manner. Each battery 15 has four battery cells 80, which are wet secondary batteries having an appropriate structure, in the height direction and the front-back direction.
It is a battery pack in which six pieces are arranged side by side and connected in series, and the periphery thereof is connected by a frame member 81. The frame member is a pair of front and rear frames 7 arranged in the front-rear direction on the upper and lower surfaces of each battery 15.
1 and an upper and lower frame 81 for vertically connecting the front and rear ends thereof
Composed of and. Since an appropriate number of ribs 82 are formed on the surface of each battery cell 80, a large number of ventilation grooves 83 are formed in the left-right direction on the connection surface between adjacent battery cells 80. In addition, in this figure, the ventilation groove 83 is omitted.

The air in the battery case 12 is transferred to the duct 24.
As a result of being sucked into the battery case 12 through the fan 23, the outside air sucked into the battery case 12 from the side air gap 72 (FIG. 3) flows through the air passage 83 and the gap 56 between the left and right batteries 15. When passing, the battery 15 is efficiently cooled. The ventilation groove 83 is closed at the rear of each battery 15 by bonding a sealing tape 84. This is for giving suction force by the fan 23 to the front end portion so as not to locally suck only the portion near the duct 24. The degree of closure with the sealing tape 84 is appropriately selected.

As is apparent from FIG. 3, the collector coupler 16
Has an upper and lower two-divided structure, one of which is provided with a female terminal 86 to which the battery terminal 85 is connected, and the other of which is provided with a male terminal 87 to be inserted therein. Male Terminal 87
Is connected to a harness 88 (FIG. 1) extending from the collector coupler 16 to the motor of the power unit 8. As is apparent from FIG. 1, the current collector coupler 16 is attached to the side surface of the battery 15 with three bolts 89, and can be extracted upward by removing these bolts.

FIG. 7 shows a plane sectional structure of the power unit 8. The case body 90 of the power unit 8 is divided into a motor chamber 92 in which an electric motor 91 is accommodated and a transmission chamber 96 in which a belt type continuously variable transmission 93, a starting clutch 94 and a speed reduction mechanism 95 are accommodated.

A bearing portion 98 of a motor shaft 97 is formed between the motor chamber 92 and the transmission chamber 96. Both chambers communicate with each other behind the bearing portion 98. A motor fan 99 is provided on the motor shaft 92 side of the motor shaft 97, and a drive pulley 100 is provided on the transmission chamber 96 side. The drive pulley 100 is also provided with a belt fan 101, and an exhaust port 102 is formed at the bottom of the middle portion of the transmission chamber 96 to open to the atmosphere.

The electric motor 91 in the motor chamber 92 is
A magnet 103 and a stator coil 104 arranged around the magnet 103 are provided. A heat sink 105 is attached to the right wall portion of the motor chamber 92 with bolts 106, and the periphery is covered with a cover 107. One end of a duct 109 is connected to the opening 108 of the cover 107, and the other end communicates with the inside of the rear cover 19 (FIG. 2).

When the motor fan 99 is rotated coaxially by the rotation of the motor shaft 97, the relatively clean air in the rear cover 19 is sucked into the motor chamber 92 through the opening 109 and the electric motor 91. After cooling, it flows out into the transmission chamber 96, and is further discharged into the atmosphere through the exhaust port 102.

Next, the operation of this embodiment will be described. In FIG. 1, when the battery 15 is first removed, the fixing member 58 is exposed by removing the bolt 6 and removing the step floor 5. Then, by removing the front and rear bolts 61 and 63 and removing the fixing member 58, the battery 15 can be taken out upward from the battery case 12. Therefore, it is possible to take out quickly only by removing the two bolts 61 and 63.

On the contrary, the battery 15 is replaced by the battery case 12
In order to support the battery 15 in the battery case 12
The battery case 12 is inserted into the inside of the battery case 12 from above.
It is placed on the lower mount rubber 50 to which is attached.
Then, the fixing member 58 is placed in the front-rear direction on the upper portion of the battery 15 via the sponge plate 57, and the front-rear end portions thereof are fixed by the bolts 6.
1 and 63 are attached to the front mounting portion 36 and the rear mounting portion 45 of the battery case 12, the fixing member 58 presses and fixes the upper portion of the battery 15, and at the same time, the fixing member 5
Since the lower end portion 70 of the upper mount rubber 68 provided on the cross member 66 of No. 8 contacts the front and rear frame 71, the battery 15
Is quickly supported by the battery case 12, and is elastically supported to be resistant to vibration. After that, when the step floor 5 is attached, the step floor 5 is elastically supported by the upper end portion 69 of the cross member 66, so that the upper mount rubber 68, which is a single member, simultaneously supports the battery 15 and the two members of the step floor 5. This is advantageous because it can be done.

Another embodiment in which the battery 15 can be attached to and detached from the side of the vehicle body will be described below. The same reference numerals are used for the common function parts as in the previous embodiment.

In each of these embodiments, the battery 15 is arranged in the width direction of the battery case 12 (vehicle width direction, the same applies hereinafter).
This is an example in which the longitudinal directions of the are aligned and attached and detached.
First, in the second embodiment shown in FIG. 8, the floor frame 4 is continuous with the lower part of the main frame 3 and the center part of the vehicle body is composed of a single pipe frame extending in the front-rear direction. 18 are connected.

The center of the upper part of the battery case 12 is attached to the floor frame 4, and a plurality of partition plates 110 are provided in the vehicle width direction orthogonal to the floor frame 4.
A plurality of battery storage chambers 111 are formed between the partition plates 110 along the entire length in the vehicle width direction. This battery storage chamber 11
1 has an inlet / outlet opening 112 opened to the side of the vehicle body. The battery 15 may be an assembled battery having the same configuration as the previous embodiment or a single cell.

In this case, since the floor frame 4 does not exist on the side of the battery case 12, the battery 15 can be attached / detached to / from the vehicle body side through the loading / unloading port 112. Therefore, it is advantageous when the weight of the battery 15 becomes large and it is difficult to lift the battery 15 upward. In addition, by providing the partition plate 110, it becomes strong against a hit from below. Further, as another effect of the single floor part frame 4, the step floor 5 can be narrowed, so that the vehicle body can be made slim and the foot wearing property can be improved.

In the third embodiment shown in FIG. 9, the side wall 34 is made openable / closable via a hinge 113 in addition to that of FIG. Therefore, the side wall 34 has the access port 112.
Is a member for opening and closing the, and constitutes the opening and closing member of the present application.
Although the battery 15 is a battery pack similar to the above,
The shape is adapted to the cross section of the battery case 12 in which the longitudinal direction is used as the vehicle width direction, the number of battery cells at the bottom is reduced, and the slope portion 48 is formed. Further, a protrusion 114 for escaping the floor frame 4 upward is formed in the central portion of the step floor 5, but since the feet F are placed on both sides of this portion, the presence of this portion does not matter.

In this way, the battery 15 can be pulled out in the vehicle width direction by opening the side wall 34. At this time, the portion of the battery 15 that has come out of the battery case 12 due to its own weight W is lowered, so the battery 15 The corner a at the back of the step floor 5 and the bottom of the battery 15 come out gradually downward while alternately contacting the open end b of the bottom 12a of the battery case 12, respectively.
The battery 15 can be pulled out without slipping off.

The fourth embodiment shown in FIGS. 10 and 11 is basically the same as the first embodiment shown in FIG. 8, but the length of the battery case 15 in the longitudinal direction is reduced to about half, and the battery case 15 is formed in the lateral width direction. The storage room is separated into the left and right by the width. In this case, a partition plate 115 is also provided in the front-rear direction in the center of the battery case 12. Note that FIG. 11 is a view in which a step floor 5 is added to the cross section of FIG.

The fifth embodiment of FIG. 12 is an example in which the floor frame 4 formed of a single member is provided in the front and rear direction of the central portion below the battery case 12, and FIG. 13 is a cross section thereof. In this way, the step floor 5 can be made flat and have a large area. As is apparent from FIG. 13, slopes 116 are provided between both sides of the bottom 12a of the battery case 12 and the floor frame 4 to facilitate banking.

FIG. 14 and subsequent figures show examples in which the battery 15 is taken in and out by the guide means. First, the sixth embodiment of FIG. 14 is an embodiment similar to that of FIG. 9, but the step floor 5, the side wall 34 and the bottom portion 12a serve as the opening / closing member of the present application and can be opened and closed, and the battery 15 is a guide not shown. It is possible to move horizontally to the side of the vehicle body by means.

In the seventh embodiment shown in FIG. 15, the step floor 5, the side wall 34 and the bottom portion 12a are opened and closed, and the guide means comes out of the battery case 12 by gradually lowering the tip end side by the parallel links 117 of equal length. It is like this.

In the eighth embodiment shown in FIG. 16, each half of the step floor 5 and the bottom portion 12a can be opened and closed together with the side wall 34 in the central portion (the figure shows the state in which only the right side is opened).
The battery 15 is guided by a slide member 118 whose one end is rotatably supported. 2 slide members 118
One guide groove 119 is formed, and the side surface of the battery 15 is supported at two places in the guide groove 119. Therefore, the battery 15 is supported by the slide member 118 which is initially supported horizontally.
Moves in the horizontal direction to reach the opening 120 formed at the end of the guide groove 119. In this state, the slide member 118
When is rotated downward about the rotation center 121, the battery 15 tilts obliquely downward at an angle of about 45 ° and can be taken out sideways here.

In the ninth embodiment shown in FIG. 17, the battery 15 can be rotated by a large amount up to about 90 ° in comparison with the one shown in FIG.
It is rotated by 90 °, and the left side is rotated by about 90 ° or more by using the trapezoidal link 123 of unequal length. Any of these may be selected and used as necessary.

The tenth embodiment of FIG. 18 is an example using further trapezoidal links 125 and 126 of different unequal lengths, both of which can be pulled out obliquely downward, but a combination of link members. Thus, the inclination of the battery 15 can be set arbitrarily.

In the eleventh embodiment shown in FIG. 19, a pair of link members 127 and 128 having different lengths are used, and the center of rotation of each of them is located outside the upper portion of the battery 15. As a result, the battery 15 is pulled out in an upright state.

In the twelfth embodiment shown in FIG. 20, the left and right batteries 15 are moved in a non-uniform manner. The right side slides horizontally and the left side turns diagonally downward together with the side wall 34. Note that, as the combination of the left and right unbalanced operations, it is possible to arbitrarily combine the ones described so far or other ones.

[0055]

According to the first aspect of the present invention, the floor portion frame below the step floor supports the central portion of the battery case that opens upward, accommodates the battery on the battery case, and secures the upper portion of the battery. Hold down with a fixing member that extends in the front-rear direction along the lower surface of the step floor,
The front and rear ends of this fixing member were removably attached to the battery case by connecting members. Therefore, if the step floor is removed, then the battery can be taken out above the battery case only by removing the connecting members before and after the fixing member, so that the battery can be attached and detached quickly and the maintainability is improved.

According to the invention of claim 2, in the battery according to claim 1, the bottom portion is provided via the elastic body previously attached to the battery case, and the upper portion is provided via the elastic body previously attached to the fixing member. , Each of which is elastically supported. Therefore, the bottom part and the upper part can be elastically supported only by inserting the battery into the battery case and pressing the upper part with the fixing member, so that the elastic support is facilitated and the vibration is strong.

According to the third aspect of the invention, the floor frame is formed of a single member extending in the front-rear direction in the center of the vehicle body, and a battery case for accommodating a battery is provided above or below the floor frame. In addition to supporting it, the side of this battery case was provided with an opening and exit opening to the side of the vehicle body, so there is no floor frame on the side of the battery case, and the battery is passed through the opening and exit of the battery case side Can be taken in and out from the side. Therefore, the attachment / detachment operation can be facilitated even if the battery becomes large and the weight becomes large.

According to the fourth aspect of the present invention, since the opening / closing member of the third aspect is openably / closably covered by the opening / closing member, the battery can be taken in / out from the side of the vehicle body through the opening / closing member by opening the opening / closing member. When the opening / closing member is closed after the accommodation, the battery can be stably held in the battery case without falling off.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part of a first embodiment.

FIG. 2 is a partially cutaway left side view of the electric scooter to which the first embodiment is applied.

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

FIG. 4 is an exploded perspective view of essential parts of the first embodiment.

FIG. 5 is a partial cross-sectional view of the essential parts of the first embodiment.

FIG. 6 is a schematic perspective view of an essential part of the first embodiment.

FIG. 7 is a plan sectional view of the power unit according to the first embodiment.

FIG. 8 is a perspective view of a main part according to a second embodiment.

FIG. 9 is a lateral cross-sectional view of an essential part for explaining a method of using the third embodiment.

FIG. 10 is a perspective view of essential parts according to a fourth embodiment.

FIG. 11 is a cross sectional view of the fourth embodiment.

FIG. 12 is a perspective view of essential parts according to the fifth embodiment.

FIG. 13 is a transverse sectional view of the fifth embodiment.

FIG. 14 is a cross sectional view of the sixth embodiment.

FIG. 15 is a cross sectional view of the seventh embodiment.

FIG. 16 is a cross sectional view of the eighth embodiment.

FIG. 17 is a transverse sectional view of the ninth embodiment.

FIG. 18 is a transverse sectional view of the tenth embodiment.

FIG. 19 is a transverse sectional view of the eleventh embodiment.

FIG. 20 is a transverse sectional view of the twelfth embodiment.

[Explanation of symbols]

 4 Floor Frame 5 Step Floor 12 Battery Case 15 Battery 58 Fixing Member 50 Lower Mount Rubber 68 Upper Mount Rubber 112 Exit Port

Claims (4)

[Claims] 1. An electric vehicle in which a step floor is detachably attached to a floor frame disposed between the front and rear wheels in the front-rear direction, and a battery for driving power is supported by the floor frame below the step floor. A battery case with an upward opening is supported by the partial frame, the battery is accommodated in the battery case, and the upper part of the battery is pressed by a fixing member extending in the front-rear direction along the lower surface of the step floor. A battery supporting device for an electric vehicle, wherein each part is detachably attached to a battery case by a coupling member. 2. The battery according to claim 1, wherein a bottom portion is elastically supported via an elastic body previously attached to the battery case, and an upper portion is elastically supported via an elastic body previously attached to the fixing member. A battery supporting device for an electric vehicle characterized by being provided. 3. An electric vehicle in which a step floor is removably attached to a floor frame disposed in the front-rear direction between front and rear wheels, and a battery for driving power is supported by the floor frame below the step floor. The partial frame is formed of a single member extending in the front-rear direction in the center of the vehicle body, and a battery case for accommodating a battery is supported above or below the floor frame, and the vehicle body side is attached to the side portion of the battery case. A battery supporting device for an electric vehicle, which is provided with a loading / unloading opening that is open toward one side. 4. A battery supporting device for an electric vehicle, wherein the opening / closing opening of claim 3 is openably / closably covered by an opening / closing member.