JP2013199240A - Electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vehicle that can secure a wide battery space without having a long wheel base.SOLUTION: An electric vehicle mounts batteries 22 and drives a motor for vehicle driving on electric power of the batteries 22. The electric vehicle includes a battery frame 15 for supporting the batteries 22. The battery frame 15 has a pair of right and left plates 42, 41 on right and left rear wheels 4 of the electric vehicle, and the batteries 22 are divided in the respective plates 42, 41 and supported by them.

Description

  The present invention relates to an electric vehicle that drives a vehicle driving motor with electric power of a battery.

  Conventionally, some electric vehicles include a battery frame that supports a battery (see, for example, Patent Document 1). In Patent Document 1, a pair of left and right sheet metal support cases functioning as a battery frame are disposed in front of the rear wheel and below the seat, and the battery is supported by these support cases. According to this configuration, since the battery frame having rigidity is used, the battery having a relatively heavy weight can be supported with sufficient support strength.

JP-A-4-358833

However, in the conventional electric vehicle, since the battery frame is disposed in front of the rear wheel, the position of the battery is limited to a position higher than the rear wheel. In particular, in the scooter type small vehicle as shown in Patent Document 1, the space between the lower part of the seat and the rear wheel is small, and it is difficult to mount a large battery in this space, and it is stored under the seat. It is also difficult to secure space. As a method of avoiding this, a method of expanding the space between the rear wheel and the lower part of the seat by arranging the rear wheel further rearward is conceivable. However, with this method, the wheel base, which is the distance between the front and rear wheels, becomes longer, and the vehicle body becomes larger.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an electric vehicle capable of ensuring a wide battery space without lengthening the wheel base.

In order to achieve the above object, the present invention provides a battery (22, 322) mounted on an electric vehicle that drives a vehicle drive motor (21, 321) with electric power of the battery (22, 322). 22 and 322). The battery frame (15, 315) includes a pair of left and right plates (42, 315) on the left and right of the wheels (4) of the electric vehicle (1, 301). 41), and the batteries (22, 322) are distributed and supported by the plates (42, 41).
According to the present invention, since the battery is distributed and supported on each plate, it is not necessary to provide a space for the battery before and after the wheel, and a wide battery space can be secured without lengthening the wheel base. .

Further, the present invention is characterized in that the battery (22, 322) overlaps the wheel (4) in a side view of the vehicle body.
According to the present invention, it is possible to arrange the wheels so as to overlap the battery, and it is possible to secure a wide battery space without lengthening the wheel base.
Further, according to the present invention, the rear part of the pair of left and right plates (42, 41) spreads outward in the vehicle width direction toward the rear of the vehicle body, and the front part (4A) of the wheel (4) is located between these rear parts. It is characterized by that.
According to the present invention, the wheels can be arranged close to the rear side, and a wide battery space can be secured without lengthening the wheel base. Further, since the width of the front portion of the plate is reduced, it becomes easier for a person to straddle the front side of the battery frame.

Further, according to the present invention, the battery (22) is distributed and supported by the pair of left and right plates (42, 41) with different sizes, and the one-side battery (61) supported by one of the plates (41). A power drive unit (23) for driving the vehicle drive motor (21) is further supported on the other plate (42) on which the other battery (62) having a smaller size is supported. Features.
According to the present invention, the right and left weight balance can be made uniform.

In the present invention, the motor for driving the vehicle (21) is disposed in the vicinity of the wheel (4) on either the left or right side of the wheel (4), and the other plate (42) (4) is a plate located on the same side as the vehicle drive motor (21), and the power drive unit (23) is interposed between the vehicle drive motor (21) and the other battery (62). ) Is supported.
According to the present invention, the power drive unit can be protected by surrounding the power drive unit by the vehicle drive motor and the other battery, and the wiring connecting the power drive unit, the other battery, and the vehicle drive motor can be shortened. it can.

Further, according to the present invention, the battery (322) is distributed and supported in substantially the same size on each of the pair of left and right plates (42, 41), and the pair of left and right plates (42, 41) is supported by the battery. A power drive unit (323) for driving the vehicle drive motor (321) is supported on the front plate (340) connected at the front of the frame (315).
According to the present invention, a large battery is supported on each of the left and right plates, and the left and right weight balance of the vehicle can be made uniform while securing the battery capacity, and the wiring connecting the power drive unit and the battery can be shortened. .
In the present invention, the battery (22, 322) is covered with a resin or metal cover (64, 65, 364), and the cover (64, 65, 364) is in close contact with the plate (42, 41). It is characterized by doing.
According to the present invention, the heat of the battery can be efficiently radiated to the plate side through the cover.

In addition, the present invention is characterized in that a fan (67, 267) for circulating external air between the plates (42, 41) is disposed at least on either the upper part or the lower part of the plates (42, 41). To do.
According to the present invention, heat transmitted from the battery to the plate can be radiated by the wind of the fan, and the battery can be efficiently cooled.
Further, according to the present invention, a cavity (44) for discharging air to the outside by the fan (67) is provided between the pair of left and right plates (42, 41), and the cavity (44) It is characterized by communicating in the cover (64, 65, 364).
According to the present invention, the heat of the battery can be discharged by the flow of air discharged from the inside of the cover through the hollow portion to the outside, and the battery can be efficiently cooled.

Further, according to the present invention, the battery (322) is covered with a resin or metal cover (364), the cover (364) is in close contact with the plate (42, 41), and the plate (42, 41) A fan (67) that circulates external air between the plates (42, 41) is disposed in at least one of the upper part and the lower part, and the fan (67) is interposed between the pair of left and right plates (42, 41). Is provided with a cavity (44) for discharging air to the outside, and the cavity (44) communicates with the cover (364) and is in contact with the front plate (340). 323) is provided with a cooling fin (324A) on the mounting surface (324), and the cooling fin (324A) is exposed in the cavity (44).
According to the present invention, the air flowing from the cavity to the outside can be applied to the cooling fin, and the power drive unit can be efficiently cooled.

Further, the present invention is characterized in that a cushion unit (39) of the wheel (4) passes between the pair of left and right plates (42, 41).
According to the present invention, the space between the plates can be used effectively, and the vehicle can be downsized.
Further, the present invention is characterized in that the upper end of the cushion unit (339) of the wheel (4) is connected to the rear part of the pair of left and right plates (42, 41) behind the battery (322). .
According to the present invention, the cushion unit can be supported with a simple configuration even when the batteries are provided on the left and right sides of the battery frame.

Further, according to the present invention, the battery frame (15, 315) is covered with a vehicle body cover (C) with a storage space (25, 26) in front of and behind the battery frame (15, 315). C) has an opening that exposes the storage space (25, 26) upward, and the opening is closed by a seat (24) of the electric vehicle (1, 301).
According to the present invention, the storage space can be secured by effectively using the space below the seat before and after the battery frame. The storage space can be easily accessed by simply opening the seat.

Further, according to the present invention, of the front and rear storage spaces (25, 26), the front storage space (25) opens upward by the opening when the seat (24) is opened, and the rear storage space. (26) is characterized in that the upper part is opened by opening an opening lid (36) provided at the rear part of the vehicle body cover (C).
According to the present invention, the storage space can be easily accessed.

In the electric vehicle according to the present invention, the battery frame has a pair of left and right plates on the left and right of the wheel of the electric vehicle, and the battery is distributed and supported on each plate, so that a space for the battery is provided on the front and rear of the wheel. There is no need, and a wide battery space can be secured without lengthening the wheelbase.
In addition, the battery can be arranged close to the wheel as viewed from the side of the vehicle body, and a wide battery space can be secured without lengthening the wheel base.

In addition, the rear part of the pair of left and right plates is located between the pair of left and right plates that spread outward in the vehicle width direction toward the rear of the vehicle body. A large battery space can be secured. Further, since the width of the front portion of the plate is reduced, it becomes easier for a person to straddle the front side of the battery frame.
In addition, the batteries are distributed and supported by a pair of left and right plates in different sizes, and the power drive unit is supported on the other plate on which the other battery having a smaller size than the one battery is supported. The weight balance can be made uniform.

In the vehicle drive motor, the other plate on which the other side battery is supported is a plate located on the same side as the vehicle drive motor with respect to the wheels, and between the vehicle drive motor and the other side battery. In addition, since the power drive unit is supported, the power drive unit can be protected by surrounding the power drive unit with the vehicle drive motor and the other battery, and wiring for connecting the power drive unit, the other battery and the vehicle drive motor can be provided. Can be shortened.
In addition, the batteries are distributed and supported on each of the left and right plates in approximately the same size, and a power drive unit is provided on the front plate of the battery frame, so a large battery is supported on each of the left and right plates. Thus, while ensuring the battery capacity, the left and right weight balance of the vehicle can be made uniform, and the wiring connecting the power drive unit and the battery can be shortened.

In addition, since the resin or metal cover is in close contact with the plate, the heat of the battery can be efficiently radiated to the plate side through the cover.
In addition, since the fan for circulating the external air between the plates is arranged, the heat transmitted from the battery to the plate can be dissipated by the wind of the fan, and the battery can be cooled efficiently.
Moreover, since the cavity provided between the plates communicates with the inside of the cover, the heat of the battery can be discharged by the flow of air discharged from the inside of the cover through the cavity to the outside, and the battery can be efficiently Can be cooled.

In addition, a cooling fin is provided on the mounting surface of the power drive unit that contacts the front plate, and the cooling fin is exposed in the cavity, so that air flowing from the cavity to the outside can be applied to the cooling fin. Can be cooled efficiently.
Furthermore, since the wheel cushion unit passes between the pair of left and right plates, the space between the plates can be used effectively, and the vehicle can be downsized.
In addition, since the upper ends of the wheel cushion units are connected to the rear portions of the pair of left and right plates behind the battery, the cushion unit can be supported with a simple configuration even when the batteries are provided on the left and right sides of the battery frame.

Furthermore, since the storage space before and after the battery frame is closed by the seat, the storage space can be secured by effectively using the space below the seat before and after the battery frame. The storage space can be easily accessed by simply opening the seat.
In addition, the front storage space is opened upward by the opening when the seat is opened, and the rear storage space is opened upward by opening the opening lid provided at the rear of the vehicle body cover. Can be accessed.

1 is a left side view of an electric vehicle according to a first embodiment of the present invention. It is a left view of the electric vehicle of the state which removed the vehicle body cover. It is the figure which looked at the electric vehicle of the state which removed the vehicle body cover from upper direction. It is the top view which looked at the electric vehicle of the state which removed the vehicle body cover from the downward direction. It is a perspective view of the electric vehicle of the state which removed the vehicle body cover. It is a perspective view of a battery frame. It is a perspective view which shows the battery frame provided with the bracket. It is the figure which looked at the attachment state of a battery from the vehicle body left side. It is a figure which shows the attachment method of a battery. It is the figure which looked at the attachment state of a battery from the vehicle body back. It is a perspective view which shows the attachment state of a storage box. It is a left view of the electric vehicle of the state which removed the vehicle body cover and the storage box in 2nd Embodiment. It is a left view of the electric vehicle in 3rd Embodiment. It is the top view which looked at the electric vehicle from the upper part. It is the figure which looked at the electric vehicle from back. It is a perspective view of an electric vehicle. It is the perspective view which looked at the power drive unit from the back side. It is a perspective view of a battery frame, one side battery, and another side battery. It is a perspective view which shows the lower part of an other side battery.

Embodiments of the present invention will be described below with reference to the drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are the same as directions with respect to the vehicle body unless otherwise specified. Moreover, the symbol FR shown in each figure indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol R indicates the right side of the vehicle body.
[First Embodiment]
FIG. 1 is a left side view of the electric vehicle according to the first embodiment of the present invention.
As shown in FIG. 1, the electric vehicle 1 is a scooter-type electric two-wheeled vehicle having a low floor 32 on which a driver puts his / her foot. 4 (wheel) is supported by the swing arm 10 connected to the rear part of the vehicle body frame F. The vehicle body frame F is covered with a resin vehicle body cover C.

FIG. 2 is a left side view of the electric vehicle 1 with the vehicle body cover C removed. FIG. 3 is a view of the electric vehicle 1 with the vehicle body cover C removed as viewed from above. FIG. 4 is a plan view of the electric vehicle 1 with the body cover C removed as viewed from below. FIG. 5 is a perspective view of the electric vehicle 1 with the vehicle body cover C removed. In FIGS. 2, 3, and 5, a storage box 80 described later is not shown.
As shown in FIGS. 1 to 5, the vehicle body frame F is configured by integrally joining a plurality of metal parts by welding or the like, and includes a head pipe 11 provided at the front portion and a rear lower portion from the head pipe 11. A down frame 12 that extends, an under frame 13 that inclines rearwardly downward from the lower end of the down frame 12, a rear frame 14 that is provided at the rear end of the under frame 13, and a battery that extends upward from the rear frame 14 Frame 15. At the rear part of the battery frame 15, a plate-like rear base part 70 extending rearward above the rear wheel 4 is provided.
Further, cross frames 5 and 6 extending in the vehicle width direction are provided at the front portion and the rear portion of the under frame 13. The cross frames 5 and 6 are provided with a pair of left and right floor frames 7 connecting the ends of the cross frames 5 and 6 in the vehicle width direction back and forth.

A pair of left and right front forks 17 that support the front wheel 3 are rotatably supported by the head pipe 11, and a steering handle 18 is provided on an upper portion of the front fork 17.
As shown in FIG. 5, the rear frame 14 is a frame configured by combining plate materials in a substantially box shape, and faces the front plate portion 14 </ b> A that is coupled to the rear end of the underframe 13 and the side frame. It has a pair of left and right side plate portions 14B facing and an upper plate portion 14C constituting the upper surface of the rear frame 14. The rear and lower surfaces of the rear frame 14 are open.
The front plate portion 14A of the rear frame 14 is provided with a base portion 14D that protrudes forward along the upper plate portion 14C. In addition, stays 14E and 14F connected to the battery frame 15 are provided upright on the front portion and the left and right edges of the upper plate portion 14C.

A pivot shaft 19 that passes through the left and right side plate portions 14B is provided at the rear portion of the rear frame 14. The swing arm 10 has a pair of left and right front end portions 10A extending forward and backward on the outer surface side of the left and right side plate portions 14B, and is pivotally supported by a pivot shaft 19 inserted through the front end portions 10A so as to be swingable up and down. The pair of front end portions 10A are connected by a cross pipe 10B (FIG. 4) extending in the vehicle width direction.
The swing arm 10 is a cantilever type that supports the rear wheel 4 from the left and right sides, extends to the left side of the rear wheel 4 along the left side plate portion 14B, and pivots the rear wheel 4 on the right side of the rear portion. Support. The swing arm 10 has a motor storage chamber 20 bulging to the left side at the rear, and a three-phase AC motor 21 (vehicle drive motor) that drives the rear wheel 4 is stored in the motor storage chamber 20. Yes. The motor 21 rotates the axle 4B via a plurality of reduction gears, and the rear wheel 4 is driven by the rotation of the axle 4B.

The battery frame 15 is connected to the upper plate portion 14C of the rear frame 14 and extends upward. A battery 22 that supplies power to the motor 21 is supported by the battery frame 15.
A power drive unit 23 (not shown in FIG. 5) for controlling the driving of the motor 21 is supported by the battery frame 15. The power drive unit 23 converts the direct current supplied from the battery 22 into an alternating current and supplies it to the motor 21. The battery 22 and the power drive unit 23 are connected by wiring (not shown). The three wires 28 connecting the power drive unit 23 and the motor 21 are drawn out from the lower part of the rear portion of the power drive unit 23, pass through the swing arm 10, and are connected to the motor 21 in the motor storage chamber 20.
A bracket 50 to which the upper end of a cylindrical cushion unit 39 (FIG. 3) is connected is provided on the upper part of the battery frame 15. The lower end of the cushion unit 39 is connected to the cross pipe 10 </ b> B of the swing arm 10.

As shown in FIG. 1, the seat 24 on which the driver is seated is disposed above the battery frame 15.
A front storage space 25 (a front storage space) capable of storing articles is provided below the front portion of the seat 24 and in front of the battery frame 15. A rear storage space 26 (rear storage space) capable of storing articles is provided below the rear portion of the sheet 24. A storage box 80 provided across the front storage space 25 and the rear storage space 26 is disposed below the seat 24, and the seat 24 is supported by the storage box 80. The seat 24 is pivotably connected back and forth via a hinge 81 provided on the front surface of the upper portion of the storage box 80, and the opening of the upper portion of the storage box 80 is opened and closed as the seat 24 rotates. The

As shown in FIG. 1, the vehicle body cover C includes a front cover 30 that covers the front of the head pipe 11 and the down frame 12, a leg shield 31 that covers the rear of the head pipe 11 and the down frame 12, and an upper portion of the under frame 13. A low floor 32 that covers and puts the driver's feet, a pair of left and right under covers 33 that covers the sides of the under frame 13, a center cover 35 that covers the battery frame 15 from the front under the seat 24, and a center cover 35, a pair of left and right side covers 34 extending to the rear of the vehicle body, covering the battery 22 and the like below the seat 24, and a rear cover 36 (opening lid) covering the rear storage space 26 from above at the rear of the seat 24. ) And an upper cover 37 that covers the central portion of the steering handle 18. The front wheel 3 is covered with a front fender 38. The rear wheel 4 is covered at the top by a rear fender 29.
A low voltage battery 85 that drives auxiliary equipment such as vehicle lights is supported by the under frame 13 below the low floor 32.

FIG. 6 is a perspective view of the battery frame 15.
As shown in FIGS. 3, 5 and 6, the battery frame 15 is a columnar frame having a torii-like cross-sectional shape, and a front connecting plate 40 (front plate) extending vertically toward the front side of the vehicle. ), A pair of left and right plates 42 and 41 extending rearward from the rear surface of the front connecting plate 40, and between the one (right side) plate 41 and the other (left side) plate 42 behind the front connecting plate 40. It has a reinforcing connecting plate portion 43 that is stretched over. In the front portion of the battery frame 15, a hollow portion 44 surrounded by the front connection plate 40, the plates 42 and 41 and the reinforcing connection plate portion 43 is formed. The hollow portion 44 communicates with the upper and lower sides of the battery frame 15.
The battery frame 15 is made of a metal having high thermal conductivity. Here, the battery frame 15 is made of an aluminum alloy as an example. The battery frame 15 has the same cross-sectional shape in the vertical direction, and can be easily manufactured by extrusion molding. The rear base 70 is welded between the rear portions of the plates 42 and 41 after the battery frame 15 is formed by extrusion molding. The rigidity of the battery frame 15 can be effectively improved by connecting the plates 42 and 41 at the rear part by the rear base part 70.

The plates 42 and 41 are flat rectangular plates that are connected to each other by the front connecting plate 40 and are formed such that the distance between them increases in the vehicle width direction toward the rear of the vehicle body. The plates 42 and 41 are formed in a C-shape that widens toward the rear side when viewed from above, and a space S that is wider in the vehicle width direction toward the rear side is formed between the plates 42 and 41. . The space S is open vertically and rearward. The battery 22 is attached to battery attachment surfaces 42A and 41A that are the outer surfaces of the plates 42 and 41.
The front connection plate 40 has ribs 45 that protrude in the vehicle width direction from the front end portions of the plates 42 and 41. Each rib 45 is provided substantially perpendicular to the plates 42 and 41.
A plurality of fixing holes 15A are formed under the front connecting plate 40 and the plates 42, 41, and the battery frame 15 is inserted into the stays 14E, 14F of the rear frame 14 and fastened to the fixing holes 15A. It is coupled to the rear frame 14 by bolts 15B (FIG. 5).

FIG. 7 is a perspective view showing the battery frame 15 provided with the bracket 50.
As shown in FIG. 7, the bracket 50 is coupled to the upper part of the battery frame 15 by welding or the like. The bracket 50 includes a plate portion 51 extending along the upper edge of the front connection plate 40 of the battery frame 15, and a pair of left and right side plate portions 52, 52 extending from the plate portion 51 along the upper edges of the plates 42, 41, A reinforcing plate portion 53 spanned between the side plate portions 52 and 52 along the reinforcing connecting plate portion 43 and a support plate portion 54 spanned between the side plate portions 52 and 52 behind the reinforcing plate portion 53 are provided. doing.

An opening 55 that communicates with the cavity 44 of the battery frame 15 is formed in the front portion of the bracket 50. The side plate parts 52, 52 extend to the middle part before and after the plates 42, 41, and the support plate part 54 is located at the middle part before and after the battery frame 15.
A pair of stay pieces 54A, 54A projecting downward are provided on the lower surface of the support plate portion 54, and the upper end of the cushion unit 39 is connected to a cushion support bolt 39A (FIG. 9) inserted through the stay pieces 54A, 54A. The

A step portion 55A in which the periphery of the opening 55 is lowered by one step is formed at the front portion of the bracket 50, and a lid plate 56 (FIG. 5) that closes the opening 55 is fixed to the step portion 55A. A pair of guide ribs 56 </ b> A and 56 </ b> A extending in the vehicle width direction are formed on the upper surface of the lid plate 56.
An air hole 57 that allows the cavity 44 to communicate with the outside is formed in the front part of the upper part of the left and right plates 42 and 41. In addition, a tool hole 58 that opens on the side of the stay piece 54 </ b> A is formed behind the air hole 57 in the upper part of the plate 42. The air hole 57 and the tool hole 58 are formed in a joint portion between the plate 42 and the bracket 50.

FIG. 8 is a view of the attachment state of the battery 22 as viewed from the left side of the vehicle body. FIG. 8 shows a state in which a lid 72 described later is removed from the left battery 22.
As shown in FIGS. 5 and 8, the batteries 22 are arranged separately on the left and right sides of the vehicle body, and are supported by the one-side battery 61 supported by the right plate 41 of the battery frame 15 and the left plate 42. And the other battery 62. The one side battery 61 is a larger battery than the other side battery 62. That is, in the battery 22, the one side battery 61 is distributed and arranged on the right side plate 41, and the other side battery 62 having a size smaller than that of the one side battery 61 is distributed and arranged on the left side plate 42. Here, the other battery 62 is approximately half the size of the one battery 61. The one-side battery 61 and the other-side battery 62 are connected in series by a connection wiring 68 so that a high voltage can be obtained. The connection wiring 68 is drawn from the upper surface of the front part of the one-side battery 61 and the other-side battery 62, and is passed between the guide ribs 56 </ b> A and 56 </ b> A of the lid plate 56.

As shown in FIGS. 5 and 8, the other battery 62 includes one battery module 63 and a resin battery cover 65 (cover) in which the battery module 63 is accommodated. The battery module 63 is obtained by stacking a plurality of plate-like battery cells into a box shape.
The battery cover 65 includes a box-shaped case 71 whose one surface on the outer side of the vehicle body is open, and a lid 72 that closes the opening surface 71A of the case 71. The battery cover 65 is large enough to accommodate one battery module 63. doing. The lid 72 is fixed to the case 71 by a band 73 (FIG. 5) that contacts the outer surface of the lid 72. The band 73 extends in the front-rear direction, and is fastened to a fixing portion 71B provided on the front edge and the rear edge of the case 71.

The battery module 63 is supported in the battery cover 65 in close contact with the inner plate portion 71 </ b> C facing the lid 72. The battery cover 65 is fixed by bolts 74 so that the inner plate portion 71 </ b> C is in close contact with the battery mounting surface 42 </ b> A of the plate 42 of the battery frame 15. The bolts 74 are inserted into a plurality of fixing portions 71 </ b> D provided at upper and lower edges of the case 71 and fastened to the battery frame 15.
The inner plate portion 71 </ b> C is provided with a ventilation pipe 71 </ b> E that protrudes toward the plate 42, and the ventilation pipe 71 </ b> E is connected to the air hole 57 of the battery frame 15. It communicates with the cavity 44 of the battery frame 15 through the pipe 71E and the air hole 57.

  The other battery 62 is positioned in the front-rear direction by being abutted against the left rib 45 and extends rearward from the rear end of the plate 42. The other battery 62 is provided on the upper part of the battery frame 15 in the vertical direction. A lower portion of the plate 42 located below the other battery 62 in the battery frame 15 is a power drive unit attachment surface 42B to which the power drive unit 23 (FIG. 2) is attached in close contact.

FIG. 9 is a diagram illustrating a method for attaching the battery 22.
Referring to FIGS. 5, 8, and 9, two battery modules (not shown) that are the same as battery module 63 of other battery 62 are stored in one battery 61. The one-side battery 61 has two battery modules and a resin battery cover 64 (cover) in which these battery modules are stored.
The battery cover 64 has a box-shaped case 76 whose one surface on the outer surface side of the vehicle body is open and a lid 77 that closes the opening surface 76A of the case 76, and can accommodate two battery modules arranged side by side. It has a large size. The lid 77 is fixed to the case 76 by a pair of bands 78 and 78 (FIG. 5) that abut against the outer surface of the lid 77. The bands 78 and 78 extend in the front-rear direction, and are fastened to fixing portions 76 </ b> B provided on the front edge and the rear edge of the case 76.

  The two battery modules are supported in the battery cover 64 in close contact with the inner plate portion 76 </ b> C facing the lid 77. The battery cover 64 is fixed by bolts (not shown) so that the inner plate portion 76C is in close contact with the battery mounting surface 41A of the plate 41 of the battery frame 15. The bolts are inserted into a plurality of fixing portions 76D provided on the upper and lower edges of the case 76 and fastened to the battery frame 15.

The inner plate portion 76C is provided with a ventilation pipe (not shown) that protrudes toward the plate 41, and the ventilation pipe is connected to the air hole 57 of the battery frame 15 so that the space inside the battery cover 64 is reached. Is communicated with the cavity 44 of the battery frame 15 through the vent pipe and the air hole 57.
The one-side battery 61 is positioned in the front-rear direction by being abutted against the right-side rib 45, and extends rearward from the rear end of the plate 41. The one-side battery 61 is provided over the entire upper and lower sides of the battery frame 15 in the vertical direction.

  As shown in FIG. 9, a hook portion 82 and a pair of protrusions 83, 83 projecting toward the plate 41 are formed on the upper portion of the rear portion of the inner plate portion 76 </ b> C of the case 76. As shown in FIG. 9, the case 76 is attached to the air hole 57 of the plate 41 with the case 76 tilted forward, and the case 76 is rotated around the vent pipe as an axis. The hook 82 is hooked on the upper edge of the plate 41, and the protrusions 83 and 83 are brought into contact with the rear edge of the upper edge of the plate 41. Thereafter, the case 76 is fixed with bolts. A hook portion 82 and a pair of protrusions 83 and 83 (FIG. 10) are also formed on the inner plate portion 71 </ b> C of the case 71, and the case 71 is attached to the plate 42 in the same manner as the case 76.

  As shown in FIGS. 1 and 4, a lower part of the battery frame 15 is provided with a blower fan 67 (fan) that sucks out the air in the cavity 44 to the outside. The blower fan 67 is attached to the lower surface of the upper plate portion 14C inside the rear frame 14, and is exposed to the cavity portion 44 through a hole (not shown) formed in the upper plate portion 14C. The outlet 67 </ b> A of the blower fan 67 faces rear right so that the blown air does not hit the rear wheel 4. Thus, since heat is discharged from the vicinity of the rear frame 14 at the bottom of the vehicle, it is not necessary to provide an exhaust duct or the like in the blower fan 67 to control the direction of exhaust, and the cooling structure can be simplified.

When the blower fan 67 is driven, the air in the one-side battery 61 and the other-side battery 62 reaches the cavity 44 through the ventilation pipe 71E, the ventilation pipe (not shown) and the air holes 57, 57, and the cavity. 44 flows downward and is discharged to the outside from the outlet 67 </ b> A of the blower fan 67. For this reason, the heat of the one side battery 61 and the other side battery 62 can be quickly discharged | emitted outside. Here, the battery covers 64 and 65 are provided with air inlets (not shown) through which air is introduced.
Further, since the battery covers 64 and 65 and the power drive unit 23 are attached in close contact with the plates 42 and 41 made of a material having high thermal conductivity, the heat of the one-side battery 61, the other-side battery 62 and the power drive unit 23 is attached. Can be efficiently radiated through the plates 42 and 41.
Furthermore, since the battery frame 15 can be cooled by the air flowing through the cavity 44, the one-side battery 61, the other-side battery 62, and the power drive unit 23 can be efficiently cooled.

FIG. 10 is a view of the attachment state of the battery 22 as viewed from the rear of the vehicle body.
As shown in FIGS. 2, 3, 5, and 10, the battery frame 15 is coupled to the upper plate portion 14 </ b> C of the rear frame 14 and is erected in a state of being slightly inclined rearward. For this reason, the space in front of the battery frame 15 increases toward the top, and the front storage space 25 can be enlarged, and the driver can easily straddle the front of the center cover 35 (FIG. 1). The upper end of the rear battery frame 15 extends to a height that overlaps the head pipe 11.

  The power drive unit 23 is formed in a box shape smaller than the other battery 62, and is fixed to the power drive unit mounting surface 42 </ b> B of the plate 42 by bolts (not shown) and is positioned below the other battery 62. Thus, since the power drive unit 23 is provided on the side of the other battery 62 that is smaller than the one battery 61, the left and right weight balance of the battery frame 15 can be made uniform.

As shown in FIG. 10, the power drive unit 23 is supported between the other battery 62 and the motor storage chamber 20 of the motor 21 in the rear view. For this reason, the power drive unit 23 can be protected by the other battery 62 and the motor storage chamber 20. Moreover, since the other side battery 62, the power drive unit 23, and the motor 21 are collectively provided on the same side with respect to the rear wheel 4, the wiring connecting them can be shortened.
Further, since the one-side battery 61, the other-side battery 62, and the power drive unit 23 are collectively supported by the battery frame 15 positioned at the center of the front and rear of the vehicle body below the seat 24, mass concentration can be achieved.

The rear wheel 4 is provided with its front part 4A entering the space S in the rear part of the battery frame 15. The one-side battery 61 and the power drive unit 23 are arranged in front of the rear wheel 4 in a side view of FIG. It is supported by the battery frame 15 so as to overlap the portion 4A. In the first embodiment, only the lower part of the rear part of the plates 42 and 41 overlaps the front part 4A of the rear wheel 4 in a side view.
3, the rear portions of the plates 42 and 41 overlap the front portion 4A of the rear wheel 4. As described above, the plates 42 and 41 extending toward the left and right side surfaces of the rear wheel 4 are provided, the other battery 62 and the one battery 61 are provided on the outer surface of the plates 42 and 41, and the space between the plates 42 and 41 is provided. Since the rear wheel 4 is placed in the S, the space for the battery 22 can be secured without lengthening the wheel base.

Further, since the plates 42 and 41 spread in the vehicle width direction toward the rear, and the width is reduced at the front, the vehicle width below the front of the seat 24 can be reduced, and the driver can easily get on and off. .
Further, by removing the side cover 34, the other side battery 62 and the one side battery 61 are exposed as a whole, so that maintainability is good.

As shown in FIG. 10, the cushion unit 39 extends vertically in the front portion of the space portion S of the battery frame 15, the upper end is connected to the support plate portion 54, the lower end is connected to the cross pipe 10 </ b> B, and the rear wheel 4 It is arranged at the center in the front vehicle width direction. Thus, by passing the cushion unit 39 through the space S between the plates 42 and 41, the vehicle can be reduced in size by effectively using the space, and the cushion unit 39 is disposed in the center in the vehicle width direction. Thus, the cushion unit 39 can be operated satisfactorily.
Further, the cushion support bolt 39A can pass through the tool hole 58 and is easily attached and detached by a tool inserted from the outside of the plate 42 into the tool hole 58. For this reason, maintainability is good.

FIG. 11 is a perspective view showing an attachment state of the storage box 80.
As shown in FIG. 1, the center cover 35 and the left and right side covers 34 are arranged so as to surround the battery frame 15, so that the front storage space 25 and the rear part having an opening on the upper surface around the battery frame 15. A storage space 26 is formed, and a storage box 80 is disposed in the front storage space 25 and the rear storage space 26.
As shown in FIG.1 and FIG.11, the storage box 80 is integrally formed ranging over the front part storage space 25 and the rear part storage space 26, and the upper surface is opened over the full length. The storage box 80 includes a front storage portion 80A that is provided in the front storage space 25 and is long in the vertical direction, and a rear storage portion 80B that extends from the top of the front storage portion 80A to the rear of the vehicle. In the storage box 80, the front storage portion 80A is placed on the base portion 14D of the rear frame 14, and the rear storage portion 80B is placed on and supported by the upper portion of the battery frame 15 and the rear base portion 70. It is fixed to the vehicle body frame F by the illustrated bolt.

The front storage space 25 is a space between the center cover 35 and the front connection plate 40 of the battery frame 15. The front storage space 25 is formed vertically long along the battery frame 15, and a long article can be stored in the front storage portion 80 </ b> A disposed in the front storage space 25. The seat 24 is pivotable about a hinge 81 and can be opened and closed. Opening the seat 24 exposes the upper opening of the front storage space 25 so that articles can be taken in and out of the front storage portion 80A. It becomes.
A seat catcher 27 (FIG. 1) that engages a hook (not shown) provided on the lower surface of the rear portion of the seat 24 is provided below the rear portion of the seat 24, and the hook engages with the seat catcher 27. Thus, the seat 24 is locked in the closed state.

  The rear storage space 26 is a space surrounded by the seat 24, the upper surface of the battery frame 15, the left and right side covers 34, the rear fender 29, and the rear cover 36. The rear storage space 26 is formed long in the front-rear direction, and a long article can be stored in the rear storage portion 80B disposed in the rear storage space 26. The opening at the front of the rear storage portion 80B is closed by the seat 24. The rear opening of the rear storage portion 80B is closed by the rear cover 36. The rear cover 36 is pivotable about a hinge 36A provided at the rear thereof so that the rear cover 36 can be opened and closed. By opening the rear cover 36, the upper opening of the rear storage space 26 is exposed and the rear storage portion 80B. It is possible to put in and out the goods.

A hook (not shown) that engages with the seat catcher 27 is provided on the lower surface of the front portion of the rear storage space 26, and the rear cover 36 is locked in a closed state by engaging the hook with the seat catcher 27. Is done. The seat catcher 27 is a lock mechanism common to the seat 24 and the rear cover 36. The seat 24 overlaps the rear cover 36 from above, and after the seat 24 is opened, the rear cover 36 can be opened.
In the first embodiment, since the other battery 62 and the one battery 61 are supported on the left and right plates 42 and 41 of the battery frame 15, a space can be secured before and after the battery frame 15, and the front storage space 25. And the rear storage space 26 can be provided, and a large storage space can be secured.
Further, since the sheet 24 is supported by the battery frame 15 via the storage box 80, it is not necessary to provide a dedicated frame for supporting the sheet 24.

  As described above, according to the first embodiment to which the present invention is applied, the battery frame 15 that supports the one-side battery 61 and the other-side battery 62 is provided, and the battery frame 15 is the rear wheel of the electric vehicle 1. 4 has a pair of left and right plates 42, 41, the one side battery 61 is distributed and supported by the plate 41, and the other side battery 62 is distributed and supported by the plate 42. It is not necessary to provide a space for the battery 62 before and after the rear wheel 4, and a wide battery space can be secured without increasing the wheel base between the front wheel 3 and the rear wheel 4.

Further, since the one-side battery 61 overlaps with the front portion 4A of the rear wheel 4 in a side view of the vehicle body, the rear wheel 4 can be disposed forward by an amount corresponding to the one-side battery 61, and the wheel base is not lengthened. In addition, a large battery space can be secured.
Further, the rear part of the pair of left and right plates 42 and 41 spreads outward in the vehicle width direction toward the rear of the vehicle body, and the front part 4A of the rear wheel 4 is located in the space S between these rear parts. It is possible to secure a large battery space without lengthening the wheelbase. In addition, since the widths of the front portions of the plates 42 and 41 are reduced, it is easy for a person to straddle the vicinity of the front portion of the battery frame 15.

Further, the one side battery 61 and the other side battery 62 are distributed and supported by the one plate 41 and the other plate 42 in different sizes, and the other side on which the other side battery 62 smaller than the one side battery 61 is supported. Since the power drive unit 23 for driving the motor 21 is supported by the plate 42, the left and right weight balance of the vehicle can be made uniform.
Further, the motor 21 is disposed in the vicinity of the rear wheel 4 on the left and right other side (left side) of the rear wheel 4, and the other plate 42 on which the smaller other battery 62 is supported is The plate is located on the same side as the motor 21, and the power drive unit 23 is supported between the motor 21 and the smaller other battery 62. Therefore, the power drive unit is constituted by the motor 21 and the smaller other battery 62. The power drive unit 23 can be protected by surrounding the power supply unit 23, and the wiring connecting the other battery 62 and the power drive unit 23 and the wiring 28 connecting the power drive unit 23 to the motor 21 can be shortened.

In addition, since the battery covers 64 and 65 made of resin having high thermal conductivity are in close contact with the plate, the one-side battery 61 and the other-side battery 62 are configured to transfer the heat of the one-side battery 61 and the other-side battery 62 to the battery cover 64 and 65. The heat can be efficiently radiated to the plates 42 and 41 through 65.
In addition, since the blower fan 67 that circulates the external air to the cavity 44 between the plates 42 and 41 is disposed below the plates 42 and 41 via the upper plate portion 14C of the rear frame 14, the one side battery 61 and the other side are arranged. The heat transmitted from the battery 62 to the plates 42 and 41 can be dissipated by the wind of the blower fan 67, and the one-side battery 61 and the other-side battery 62 can be efficiently cooled.

Further, a hollow portion 44 for discharging air to the outside by a blower fan 67 is provided between the pair of left and right plates 42 and 41, and the hollow portion 44 communicates with the battery covers 64 and 65. The heat of the one-side battery 61 and the other-side battery 62 can be discharged by the flow of air discharged from the inside of the 64, 65 through the cavity 44 to the outside, and the one-side battery 61 and the other-side battery 62 are efficiently cooled. it can.
Further, since the cushion unit 39 of the rear wheel 4 passes between the pair of left and right plates 42 and 41, the space between the plates 42 and 41 can be used effectively, and the electric vehicle 1 can be downsized.

Further, the battery frame 15 is covered with a vehicle body cover C with a front storage space 25 and a rear storage space 26 in front of and behind the battery frame 15, and the vehicle body cover C extends above the front storage space 25 and the rear storage space 26. Since the opening is closed by the seat 24 of the electric vehicle 1, the space below the seat 24 can be effectively used before and after the battery frame 15 to secure a storage space. Further, the front storage space 25 and the rear storage space 26 can be easily accessed simply by opening the seat 24.
Further, the front storage space 25 opens upward by the opening when the seat 24 is opened, and the rear storage space 26 opens upward by opening the rear cover 36 provided at the rear of the vehicle body cover C. The part storage space 25 and the rear storage space 26 can be easily accessed.

The first embodiment described above is merely an example of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
In the first embodiment, it has been described that the cushion unit 39 of the rear wheel 4 passes between the pair of left and right plates 42, 41. However, the present invention is not limited to this, and for example, the plate 42 , 41 may be provided so as to extend from the rear part of the battery 22 to the rear of the battery 22, and a cushion unit may be spanned between the stay and the rear part of the swing arm 10.

[Second Embodiment]
Hereinafter, a second embodiment to which the present invention is applied will be described with reference to FIG. In the second embodiment, parts that are configured in the same manner as in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
In the first embodiment, the blower fan 67 is described as being disposed below the plates 42, 41. However, in the second embodiment, the blower fan 267 (fan) is disposed above the plates 42, 41. ) Is different from the first embodiment.

FIG. 12 is a left side view of the electric vehicle 1 with the vehicle body cover C and the storage box 80 removed in the second embodiment.
As shown in FIG. 12, the blower fan 267 that sucks out air from the cavity 44 (FIG. 6) is attached to the upper surface of the bracket 50 so as to face the opening 55 (FIG. 7) of the bracket 50. A duct 267 </ b> A extending obliquely rearward is connected to the rear exhaust port of the blower fan 267. When the blower fan 267 is driven, the air in the one-side battery 61 and the other-side battery 62 is discharged from the duct 267A through the cavity 44. The duct 267A extends to the vicinity of the side cover 34 while avoiding the inside of the storage box 80, and the exhaust from the rear end of the duct 267A does not directly hit the seat 24 or the storage box 80 but is discharged to the outside. For this reason, it can prevent that the heat | fever of the exhaust_gas | exhaustion of the ventilation fan 267 affects the sheet | seat 24 and the storage box 80. FIG.

[Third Embodiment]
A third embodiment to which the present invention is applied will be described below with reference to FIGS. In the third embodiment, parts that are configured in the same manner as in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
In the third embodiment, the power drive unit 323 is disposed on the front surface of the battery frame 315, and the battery module 63 is added to the place where the power drive unit 23 of the first embodiment is disposed. The point that the motor 321 is an in-wheel motor arranged inside the rear wheel 4 is different from that of the first embodiment.

FIG. 13 is a left side view of electrically powered vehicle 301 in the third embodiment. FIG. 14 is a plan view of the electric vehicle 301 as viewed from above. FIG. 15 is a view of the electric vehicle 301 as viewed from the rear. FIG. 16 is a perspective view of the electric vehicle 301. Here, in FIG. 13 to FIG. 16, the vehicle body cover C is removed. 14 and 16 show a state in which the storage box 380 is removed.
As shown in FIGS. 13 to 16, the electric vehicle 301 has a vehicle body frame F, and a battery frame 315 is connected to the rear frame 14. A storage box 380 that is opened and closed by the seat 24 is provided in front of and behind the battery frame 315.

A swing arm 310 that pivotally supports the rear wheel 4 is swingably supported by the pivot shaft 19 at the rear portion of the rear frame 14. The swing arm 310 is a double-supported type that supports the rear wheel 4 from the left and right sides, and a pair of left and right arm portions 310A and 310A extending in the front and rear directions of the rear wheel and the arm portions 310A and 310A are connected at the front portion. Cross pipe 310B (FIG. 14), and a cylindrical portion 310C through which the pivot shaft 19 is inserted while connecting the arm portions 310A and 310A at the front end.
The motor 321 (vehicle driving motor) has a cylindrical case 321A provided integrally with the wheel of the rear wheel 4, and a rotor, a stator, and the like are incorporated in the case 321A. The motor 321 protrudes in the vehicle width direction from the rear wheel 4 and is supported between the rear end portions of the arm portions 310A and 310A.

The battery frame 315 includes plates 42 and 41, a front connection plate 340 (front plate) that connects the plates 42 and 41, a reinforcing connection plate portion 43 (FIG. 6), and a hollow portion 44. It is formed by molding. A bracket 350 is provided on the upper part of the battery frame 315. The configuration of the bracket 350 is the same as that of the bracket 50 of the first embodiment except that the support plate portion 54 is not provided.
As shown in FIG. 16, the power drive unit 323 that controls the driving of the motor 321 is supported by the front connection plate 340 on the front surface of the battery frame 315.
A battery 322 that supplies power to the motor 321 is supported by a battery frame 315.

The battery 322 includes a one-side battery 361 supported by the right plate 41 of the battery frame 315 and an other battery 362 supported by the left plate 42. In the one-side battery 361 and the other-side battery 362, two battery modules 63 (FIG. 18) are stored one above the other. The one-side battery 361 and the other-side battery 362 are configured substantially symmetrically. The rear ends of the lower portions of the one-side battery 361 and the other-side battery 362 overlap the front portion 4A of the rear wheel 4 in a side view.
The battery cover 364 of the one-side battery 361 and the other-side battery 362 is different from the case 76 of the battery cover 64 of the first embodiment in the configuration of the case 376, and the configuration of the other parts is substantially the same. The battery cover 364 is made of resin, and the battery module 63 is attached to the inner plate portion 376C (FIG. 18) of the case 376 that is in close contact with the plates 42 and 41. The battery cover 364 is provided with a ventilation pipe 71E (FIG. 8) connected to the air hole 57 (FIG. 7) of the battery frame 315.
The one-side battery 361 and the other-side battery 362 are connected in series by a connection wiring 68 that passes between the guide ribs 56A and 56A.

FIG. 17 is a perspective view of the power drive unit 323 viewed from the back side.
As shown in FIGS. 16 and 17, the power drive unit 323 is formed in a rectangular box shape in plan view, and has a mounting surface 324 that comes into contact with the front connection plate 340 and a plurality of fins exposed to the front. And a front surface 325. The power drive unit 323 has a wiring 326 connected to the upper part of the other battery 362 at the upper part, and has cooling fins 324A formed on the mounting surface 324 at the lower part. The power drive unit 323 is fixed by bolting a plurality of fixing portions 323A provided at the edge to the front surfaces of the battery covers 364 of the one-side battery 361 and the other-side battery 362. Three wires 328 for connecting the power drive unit 323 to the motor 321 are pulled out from the lower right portion of the front surface 325 and bundled together, pass below the other battery 362, and above the left arm portion 310A. It extends rearward through and is connected to a motor 321.

FIG. 18 is a perspective view of the battery frame 315, the one-side battery 361, and the other-side battery 362. In FIG. 18, the lid 77 of the left case 376 is removed.
As shown in FIG. 18, an opening 340A communicating with the cavity 44 is formed in the front connection plate 340 of the battery frame 315. When the power drive unit 323 is attached to the front connection plate 340, the cooling fin 324A is formed. Protrudes into the cavity 44 from the opening 340A.

FIG. 19 is a perspective view showing the lower part of the other battery 362. FIG. 19 shows a state in which a lid 390 described later is removed.
As shown in FIGS. 18 and 19, the case 376 includes an intake portion 386 that takes in external air from the front surface 376 A of the case 376, a chamber 387 that bulges downward from the bottom surface of the case 376, and an intake portion 386 and a chamber 387. And a tube 388 connecting the two.
The air intake portion 386 has a wall portion 389 that protrudes in a frame shape from the lower portion of the front surface 376A and a lid 390 that closes an opening on the front surface of the wall portion 389, and is formed in a box shape. The inside of the intake portion 386 is partitioned into an upper chamber 386A and a lower chamber 386B by a partition plate 391 having a plurality of slits, and a plate-like filter 392 is set on the upper surface of the partition plate 391. . The filter 392 is sandwiched between a plurality of pins formed above the partition plate 391 and the partition plate 391A. The lid 390 is formed with an air inlet 395 that allows the upper chamber 386A to communicate with the outside. The air inlet 395 is formed by opening a lower surface of a bulging portion 395A that bulges forward from the lid 390, and water, dust, and the like are less likely to enter the upper chamber 386A from the air inlet 395.

A tube 388 is connected to the lower surface of the lower chamber 386B, and the tube 388 is bent backward and connected to the front surface of the chamber 387. The chamber 387 is an air passage extending forward and backward under the case 376, and extends to the rear part of the case 376 along the outer edge in the vehicle width direction of the case 376 below the bottom surface of the case 376. The chamber 387 communicates with the inside of the case 376 through a plurality of holes (not shown) formed over the entire bottom surface of the case 376.
Also in the one side battery 361, the intake section 386, the tube 388, and the chamber 387 are configured in the same manner as the other side battery 362.

  When the blower fan 67 is driven, the air in the one-side battery 361 and the other-side battery 362 passes through the ventilation pipe 71E (FIG. 8), the ventilation pipe (not shown), and the left and right air holes 57, 57 (FIG. 7). The air then reaches the inside of the hollow portion 44, passes through the periphery of the cooling fin 324 </ b> A, flows downward in the hollow portion 44, and is discharged to the outside from the outlet 67 </ b> A of the blower fan 67. Therefore, the heat of the one-side battery 361 and the other-side battery 362 can be quickly discharged to the outside, and the power drive unit 323 can be cooled by the air flowing through the cavity 44 via the cooling fins 324A.

  Further, the air sucked into the intake section 386 as the air is discharged from the blower fan 67 is purified by the filter 392, and then is filled almost uniformly from the front to the rear in the chamber 387 via the pipe 388. Then, the chamber 387 flows upward in the battery cover 364 to cool each battery module 63. Therefore, the insides of the one-side battery 361 and the other-side battery 362 can be kept clean, and air can be made to flow substantially uniformly in the one-side battery 361 and the other-side battery 362, thereby effectively cooling. Can do.

  As shown in FIGS. 13, 14, and 16, a pair of stays 346 and 346 extending to the rear side of the one-side battery 361 and the other-side battery 362 are provided on the upper portions of the rear portions of the plates 42 and 41 of the battery frame 315. It has been. At the rear ends of the stays 346 and 346, a pipe-like suspension connecting portion 347 extending rearward in the vehicle width is provided. The left and right end portions of the suspension coupling portion 347 are located above the left and right arm portions 310A and 310A. The cushion units 339 and 339 are provided as a pair of left and right, and are spanned between the left and right end portions of the suspension coupling portion 347 and the rear end portions of the arm portions 310A and 310A. In this way, the rigidity of the battery frame 315 can be improved by connecting the plates 42 and 41 by the suspension connecting portion 347 provided behind the one-side battery 361 and the other-side battery 362, and the one-side battery 361 and the other-side battery can be improved. Even if it is the structure which provided 362, cushioning performance can be ensured by arrange | positioning cushion units 339 and 339 on either side.

  As shown in FIGS. 14 and 15, both ends of the front cylindrical portion 310 </ b> C of the swing arm 310 are located on the outer side in the vehicle width direction from the front and rear intermediate portions of the one-side battery 361 and the other-side battery 362. For this reason, external force from the side can be received at both ends of the cylindrical portion 310C, and the one-side battery 361 and the other-side battery 362 can be protected.

As shown in FIGS. 13 and 15, the storage box 380 has a front storage portion 80A provided in the front storage space 25 (FIG. 1) and a rear storage portion 380B provided in the rear storage space 26. ing. The rear portion of the rear storage portion 380B is opened and closed by the rear cover 36. A recess 393 that is recessed in accordance with the suspension coupling portion 347 is formed on the lower surface of the rear portion of the rear storage portion 380B, and the rear portion of the storage box 380 is supported by the suspension coupling portion 347 from below. The power drive unit 323 is disposed between the front storage portion 80A and the front connection plate 340.
A storage portion 394 that protrudes into the space S between the plates 42 and 41 is formed on the bottom surface of the front portion of the rear storage portion 380B. The bottom portion 394A of the storage portion 394 extends below the upper end of the rear wheel 4 in the rear view. In this way, since the storage portion 394 is provided using the space portion S, the capacity of the storage box 380 can be secured larger.

  As described above, according to the third embodiment to which the present invention is applied, the other-side battery 362 and the one-side battery 361 are distributed to the left and right pair of plates 42 and 41 with approximately the same size. Since the power drive unit 323 is provided on the front connection plate 340 of the battery frame 315, the large battery 362 and the one battery 361 are supported on the left and right plates 42 and 41, respectively, and the battery capacity is increased. In addition, the right and left weight balance of the vehicle can be made uniform, and the wiring 326 connecting the power drive unit 323 and the other battery 362 can be shortened.

Further, a cooling fin 324A is provided on the mounting surface 324 of the power drive unit 323 that contacts the front connection plate 340, and the cooling fin 324A is exposed in the cavity 44 of the battery frame 315. The flowing air can be applied to the cooling fins 324A, and the power drive unit 323 can be efficiently cooled.
In addition, since the upper ends of the cushion units 339 and 339 of the rear wheel 4 are connected to the suspension connecting portions 347 of the left and right plates 42 and 41 behind the other battery 362 and the one battery 361, the battery frame 315 Even if the one-side battery 361 and the other-side battery 362 are provided on the left and right sides, the cushion units 339 and 339 can be supported with a simple configuration.

The third embodiment described above merely shows one aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
In the third embodiment, the upper ends of the cushion units 339 and 339 of the rear wheel 4 are connected to the rear suspension connecting portion 347 of the pair of left and right plates 42 and 41 behind the one side battery 361 and the other side battery 362. However, the present invention is not limited to this. For example, as in the first embodiment, a cushion unit is passed between a pair of left and right plates 42 and 41, and the bracket 350 is provided. The upper end of the cushion unit may be coupled to the support plate portion, and the lower end may be coupled to the cross pipe 310B.
In the third embodiment, the blower fan 67 is described as being disposed below the plates 42 and 41. However, the configuration of the third embodiment is similar to that of the second embodiment. In addition, the blower fan 67 may be disposed on the upper portions of the plates 42 and 41.
In the first to third embodiments, the battery module 63 is described as being housed in the resin battery covers 64, 65, 364. However, the present invention is not limited to this, and heat conduction such as aluminum alloy is performed. The battery module 63 may be housed in a metal battery cover having high properties. Further, only the inner plate portions 71C, 76C, and 376C of the battery covers 65, 64, and 376 that are in close contact with the plates 42 and 41 may be made of a metal such as an aluminum alloy.

1,301 Electric vehicle 4 Rear wheel
4A Front part 15,315 Battery frame 21,321 Motor (vehicle drive motor)
22,322 Battery 23,323 Power drive unit 24 Seat 25 Front storage (front storage space)
26 Rear storage (rear storage space)
36 Rear cover (opening lid)
39,339 Cushion unit 41 Plate (one plate)
42 plates (the other plate)
44 Cavity 61 One side battery 62 Other side battery 64, 65, 364 Battery cover (cover)
67,267 Blower 324 Mounting surface 324A Cooling fin 340 Front connecting plate (front plate)
C Body cover

Claims (14)

In an electric vehicle equipped with a battery (22, 322) and driving a vehicle drive motor (21, 321) with electric power of the battery (22, 322),
A battery frame (15, 315) for supporting the battery (22, 322) is provided, and the battery frame (15, 315) is a pair of left and right plates on the left and right of the wheel (4) of the electric vehicle (1, 301). (42, 41), and the battery (22, 322) is distributed and supported by the plates (42, 41).   The electric vehicle according to claim 1, wherein the battery (22, 322) overlaps the wheel (4) in a side view of the vehicle body.   The rear portion of the pair of left and right plates (42, 41) extends outward in the vehicle width direction toward the rear of the vehicle body, and the front portion (4A) of the wheel (4) is positioned between the rear portions. Item 3. The electric vehicle according to Item 1 or 2.   The battery (22) is distributed and supported by the pair of left and right plates (42, 41) in different sizes, and is smaller than the one-side battery (61) supported by one of the plates (41). The power drive unit (23) for driving the vehicle drive motor (21) is further supported on the other plate (42) on which the other battery (62) is supported. 4. The electric vehicle according to any one of 3 to 3.   The vehicle drive motor (21) is disposed in the vicinity of the wheel (4) on either one of the left and right sides of the wheel (4), and the other plate (42) is connected to the wheel (4). The plate is located on the same side as the vehicle drive motor (21), and the power drive unit (23) is supported between the vehicle drive motor (21) and the other battery (62). The electric vehicle according to claim 4.   The battery (322) is distributed and supported by each of the pair of left and right plates (42, 41) with approximately the same size, and the pair of left and right plates (42, 41) is placed in front of the battery frame (315). 4. The electric drive according to claim 1, wherein a power drive unit (323) for driving the vehicle drive motor (321) is supported on the front plate (340) connected at a portion. 5. vehicle.   The battery (22, 322) is covered with a resin or metal cover (64, 65, 364), and the cover (64, 65, 364) is in close contact with the plate (42, 41). The electric vehicle according to any one of claims 1 to 6.   The fan (67, 267) for circulating external air between the plates (42, 41) is disposed on at least one of the upper part and the lower part of the plates (42, 41). Electric vehicle.   Between the pair of left and right plates (42, 41), a cavity (44) for discharging air to the outside by the fan (67) is provided, and the cavity (44) includes the cover (64, 65, 364), the electric vehicle according to claim 8.   The battery (322) is covered with a resin or metal cover (364), the cover (364) is in close contact with the plate (42, 41), and at least one of the upper part and the lower part of the plate (42, 41). A fan (67) for circulating external air is disposed between the plates (42, 41), and the fan (67) discharges air to the outside between the pair of left and right plates (42, 41). The cavity (44) is provided, the cavity (44) communicates with the cover (364), and the mounting surface of the power drive unit (323) that contacts the front plate (340). The electric motor according to claim 6, wherein a cooling fin (324A) is provided in (324), and the cooling fin (324A) is exposed in the hollow portion (44). Both.   The electric vehicle according to any one of claims 1 to 10, wherein a cushion unit (39) of the wheel (4) passes between the pair of left and right plates (42, 41).   The upper end of the cushion unit (339) of the wheel (4) is connected to the rear part of the pair of left and right plates (42, 41) behind the battery (322). The electric vehicle according to any one of the above.   The battery frame (15, 315) is covered with a vehicle body cover (C) with a storage space (25, 26) before and after the battery frame (15, 315), and the vehicle body cover (C) is covered with the storage frame. 13. An opening having a space (25, 26) exposed upward, the opening being closed by a seat (24) of the electric vehicle (1, 301). An electric vehicle according to the above.   Among the front and rear storage spaces (25, 26), the front storage space (25) opens upward by the opening when the seat (24) is opened, and the rear storage space (26) The electric vehicle according to claim 13, characterized in that the upper part opens by opening an opening lid (36) provided at the rear part of the vehicle body cover (C).

Images