WO2019044420A1 - Electric vehicle - Google Patents

Abstract

The electric vehicle includes a seat (7) on which an occupant sits, a battery (26a) disposed below the seat (7), and an electric motor (31) connected to the drive wheels (FW, RW). At least a part of the electric motor (31) is arranged to overlap the battery (26a) in a side view.

Description

Electric vehicle

The present invention relates to an electric vehicle.
Priority is claimed on Japanese Patent Application No. 2017-167377, filed Aug. 31, 2017, the content of which is incorporated herein by reference.

BACKGROUND Conventionally, there is an electric vehicle using an electric motor as a traveling drive source (see, for example, Patent Document 1).
In this technique, the rear wheels are driven by the electric motor 3 disposed behind the seats 15 and 16 and between the left and right rear wheels 11 and 12 to drive the vehicle.

Japan JP 2013-159306

In the above-mentioned prior art, the battery 2 having a lateral width dimension extending between the side members 5 and 6 is mounted under the seats 15 and 16. The electric motor 3 is disposed behind the battery 2.
However, when the heavy electric motor is disposed at the rear (vehicle rear) of the battery, in the case of a particularly small electric vehicle, efficient component arrangement such as concentration of mass becomes an issue.

The aspect which concerns on this invention is made in consideration of such a situation, and it aims at providing the electrically-driven vehicle which can aim at concentration of mass by arrange | positioning an electric motor efficiently.

In order to solve the above-mentioned subject, the present invention adopted the following modes.
(1) The electric vehicle according to one aspect of the present invention is connected to the seat (7) on which the occupant sits, the battery (26a) disposed below the seat (7), and the drive wheels (FW, RW) And at least a portion of the electric motor (31) is arranged to overlap the battery (26a) in a side view.
(2) In the aspect of the above (1), the seat (7) may be disposed at a central portion in the longitudinal direction of the vehicle.
(3) In the aspect of the above (1) or (2), at least a part of the electric motor (31) is a body frame member (12, 13a, 13b, 13c) in at least one of a side view and a front view. It may be arranged to overlap.
(4) In any one of the modes (1) to (3), the electric motor (31) further includes a transmission mechanism (35), and at least a part of the transmission mechanism (35) It may be disposed below the sheet (7).
(5) In the aspect of the above (4), the vehicle further comprises a propeller shaft (45, 46) extending in the vehicle longitudinal direction from the transmission mechanism (35), and an output shaft (31a) of the electric motor (31) It may be arranged along the direction.
(6) In the above aspect (5), the propeller shaft (45, 46) and the output shaft (31a) of the electric motor (31) sandwich a center line (CL) in the vehicle width direction in top view It may be arranged as follows.
(7) In any one of the modes (4) to (6), a first rubber mount (33M) is provided between the electric motor (31) and the vehicle body frame (10), and the transmission mechanism A second rubber mount (37M, 38M) may be provided between (35) and the vehicle body frame (10).

According to the above aspect (1), at least a part of the electric motor is disposed in the dead space under the seat and is disposed so as to overlap with the battery under the seat in a side view, so a small electric vehicle However, it is possible to effectively utilize the space under the seat, to arrange the electric motor having a capacity, and to concentrate the mass.
In the case of the above (2), since the heavy battery and the electric motor are disposed below the seat disposed at the central portion in the longitudinal direction of the vehicle, it is possible to further concentrate the mass.
In the case of the above (3), the electric motor and the vehicle body frame member are arranged to overlap in at least one of the side view and the front view, so that the disturbance from the longitudinal direction and the vehicle width direction to the electric motor can be Can be prevented by using
In the case of the above (4), since at least a part of the transmission mechanism connected to the electric motor is disposed under the seat, the dead space under the seat is used more effectively, and the seat is disposed at the central portion in the vehicle longitudinal direction. With this configuration, the transmission mechanism, which is a heavy load, is disposed at the center of the vehicle in the front-rear direction, so that the mass can be further concentrated.
In the case of the above (5), since the output shaft of the electric motor and the propeller shaft are disposed substantially parallel to each other, it becomes easy to connect the electric motor and the propeller shaft via the transmission mechanism, shortening the transmission path to improve efficiency It can transmit power well. Further, by arranging the output shaft of the electric motor and the propeller shaft in the front-rear direction, bulkiness in the vehicle width direction can be suppressed, and a compact arrangement can be achieved.
In the case of the above (6), since the propeller shaft and the output shaft of the electric motor are laid out with the center line in the vehicle width direction, the running stability is improved by the distribution arrangement of the heavy electric motor and the propeller shaft. At the same time, the transmission mechanism connecting the electric motor and the propeller shaft straddles the center line in the vehicle width direction, so that mass concentration can be achieved.
In the case of the above (7), since the electric motor and the transmission mechanism are rubber-mounted to the vehicle body frame at at least one place, the vibration proofing of the drive source can be secured.

1 is a left side view of an electrically powered vehicle in an embodiment of the present invention. It is a top view of the above-mentioned electric vehicles. It is a top view which shows the power transmission system from the drive source of the said electric vehicle. It is a top view which shows the electric power supply system to the drive source of the said electric vehicle. It is a perspective view which shows the periphery of the battery of the vehicle body left side of the said electric vehicle, and a battery case. It is a perspective view which shows the vehicle width direction inner side of the said battery case. It is a perspective view which shows the periphery of the drive device of the said electric vehicle. It is a block diagram showing the main composition of the above-mentioned electric vehicles.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, directions such as front, rear, left, and right are the same as the directions in the vehicle described below unless otherwise specified. Further, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, an arrow UP indicating the upper side of the vehicle, and a line CL indicating the left-right center of the vehicle are described at appropriate positions in the drawings used for the following description.

<Whole vehicle>
The electric vehicle 1 shown in FIGS. 1 and 2 has a pair of left and right steered wheels and front wheels FW as drive wheels on the left and right sides of the front of the vehicle body and rear wheels as a pair of left and right drive wheels on both sides It has RW. For example, the electric vehicle 1 according to the present embodiment is a relatively small four-wheeled vehicle (MUV: multi-utility vehicle) whose main purpose is traveling on rough terrain such as a wasteland. The electric vehicle 1 is not limited to the MUV.

The electric vehicle 1 includes a roll bar 20 as an upper body that defines a riding space R. In the riding space R, a seat 7 having a seat 7a and a backrest 7b is disposed. The seat 7 has a pair of left and right seating surfaces. A dashboard 9 is disposed in front of the seat 7 with a foot space F open. A steering wheel 8 is disposed on one side (for example, the right side) of the dashboard 9. At the rear of the passenger space R (rear of the seat 7), a loading platform 3 is disposed. In front of the riding space R, a bonnet 2 is disposed. On the left and right sides of the seat 7, a pair of left and right guard pipes 4a are disposed. A pair of left and right side panels 4b is disposed below the left and right guard pipes 4a. Side doors 4c are disposed on the left and right sides of the foot space F.

The roll bar 20 includes a pair of left and right loop-shaped portions 21, front and rear cross frames 13 a and 13 b connecting the left and right loop-shaped portions 21 at the roof portion of the roll bar 20, and the back of the sheet 7 at the rear portion of the roll bar 20. The rear frame 16 supports the heel 7b from the rear and supports the left and right independent headrests 7c, and the front frame 14 supports the dashboard 9 and the steering column at the front portion of the roll bar 20.

The loop-shaped portion 21 includes a lower side 21a disposed substantially horizontally in a side view, a front upper extension 21b bent upward from the front end of the lower side 21a, and a rear end of the lower side 21a. A rear upper extension 21c which is bent to extend upward and an upper side 21d extending between upper ends of the upper extensions 21b and 21c are continuously formed. The lower side 21a is included in the step frame 5a, and supports the step floor 5 on which the passenger places his / her foot.

<Body frame>
Referring to FIGS. 1 and 3, the roll bar 20 is mounted on a vehicle body frame 10 as a lower body on which drive system components are mounted.
The vehicle body frame 10 is formed by integrally combining a plurality of types of steel materials by welding or the like. The vehicle body frame 10 includes a main frame 11 in a frame shape in plan view including a pair of left and right side frames 12, and a front frame 14 and a rear frame 16 coupled to front and rear of the main frame 11, respectively.

A drive device 30 including an electric motor 31 which is a drive source of the electric vehicle 1 is mounted on the main frame 11. Front and rear differential mechanisms 41 and 42 are mounted on the front frame 14 and the rear frame 16, respectively. The front and rear differential mechanisms 41 and 42 are connected to be able to transmit power via the drive device 30 and the front and rear propeller shafts 45 and 46, respectively. The front frame 14 and the rear frame 16 respectively support front and rear suspension devices 51 and 52 for independently suspending the left and right front wheels FW and the left and right rear wheels RW.

Front and rear seat support frames 18a and 18b having a height are fixed to the main frame 11. The seat 7 is supported on the front and rear seat support frames 18a and 18b via a substantially horizontal support frame 18c (see FIGS. 5 and 6). The seat 7 is spaced apart above the main frame 11 substantially at the center in the longitudinal direction of the vehicle. A battery 25 for supplying power to the electric motor 31 of the drive device 30 is mounted in a space extending from below the seat 7 to below the seat 7. The battery 25 is composed of a plurality of unit batteries 25a.

Below the sheet 7, a junction box 61 is provided, in which unit wires 61a extending from the plurality of unit batteries 25a are integrated. Behind the junction box 61, a PDU (power driver unit) 62 to which a collective wire 61b extending from the junction box 61 is connected is disposed. Above the PDU 62, an electric control unit (ECU) 66 that drives and controls the electric motor 31 via the PDU 62 is disposed. For example, the PDU 62 and the ECU 66 constitute an integral control unit 66U (see FIG. 8).

The main frame 11 includes, for example, a pair of left and right side frames 12 made of square steel pipe, front and rear cross frames 13a and 13b connecting front and rear end portions of the left and right side frames 12, and front and rear middle portions near the front of the left and right side frames 12. And an intermediate cross frame 13c connecting the two. The term "intermediate" used in the present embodiment is intended to include not only the center between the ends of the target but also the inner range between the ends of the target.

Lower side portions 21a of left and right loop-shaped portions 21 of the roll bar 20 are connected to the left and right outer sides of the left and right side frames 12 via front and rear connecting frames 23a and 23b extending in the left-right direction. The lower portion of the rear upper extending portion 21c of the left and right loop-shaped portions 21 of the roll bar 20 is connected to the left and right outer sides of the rear seat support frame 18b via a rear upper connecting frame 23c extending in the left-right direction.

Referring also to FIG. 5, the loop portion 21 is disposed at the rear of the unit battery pair 26a as a lower side portion 21a as an outside arrangement portion disposed outside the unit battery pair 26a of the battery 25 described later. And a rear upper extension 21c as a rear arrangement part. A rear upper connecting frame 23c is disposed behind the unit battery pair 26a. Disturbance to the unit battery pair 26a is suppressed by these frame members.

Referring to FIGS. 1 and 3, the front frame 14 has a box structure having a width smaller than that of the main frame 11 as a whole and a height higher than that of the main frame 11.
A front differential mechanism 41 is mounted inside the front frame 14. The inner end portions of the left and right suspension arms 51 a of the front suspension device 51 are supported by the left and right side portions of the front frame 14 so as to be able to swing up and down. The upper ends of the left and right cushion units 51 b of the front suspension device 51 are supported on the upper side of the left and right sides of the front frame 14.
The lower end portion of the left and right cushion unit 51b is connected to the left and right suspension arms 51a.

The rear frame 16 has a box structure having a width smaller than that of the main frame 11 as a whole and a height higher than that of the main frame 11. A rear differential mechanism 42 is mounted inside the rear frame 16. The inner end portions of the left and right suspension arms 52 a of the rear suspension device 52 are supported on the left and right side portions of the rear frame 16 so as to be vertically swingable. The upper ends of the left and right cushion units 52 b of the rear suspension device 52 are supported on the upper side of the left and right sides of the rear frame 16. The lower ends of the left and right cushion units 52b are connected to the left and right suspension arms 52a.

<Drive device>
Referring to FIGS. 1, 3 and 7, the drive device 30 includes an electric motor 31 and an electric motor 31 disposed at the rear left side of the main frame 11 along the drive axis (motor axis) C1 in the front-rear direction. A distribution mechanism (transfer) 35 is integrally provided so as to extend from the front end to the right beyond the vehicle body left-right center CL.

The electric motor 31 is driven by the power of the battery 25. The electric motor 31 is driven at variable speed by, for example, VVVF (variable voltage variable frequency) control. The electric motor 31 is controlled so as to have a continuously variable transmission. However, the invention is not limited to this. The electric motor 31 may be controlled so as to have a stepped transmission.

The electric motor 31 includes a cylindrical housing 32 centered on the motor axis C1. A rear mount portion 33 for the motor support portion 13b1 provided on the rear cross frame 13b of the main frame 11 is provided on the vehicle body left and right center CL side of the rear end portion of the housing 32. The rear mount portion 33 is supported (rubber mounted) on the motor support portion 13b1 via a bolt 33a extending in the vertical direction and a rubber bush 33b through which the bolt 33a is inserted. The symbol C2 indicates the axis of the bolt 33a. A rubber mount portion 33M for supporting the rear portion of the housing 32 of the electric motor 31 on the vehicle body frame 10 is configured by including the motor support portion 13b1, the rear mount portion 33, the bolt 33a and the rubber bush 33b.

The distribution mechanism 35 decelerates the driving force of the electric motor 31 and outputs the driving force to the front and rear propeller shafts 45 and 46. The distribution mechanism 35 includes a horizontally long casing 36 that accommodates a reduction gear and the like. The front end of the housing 32 of the electric motor 31 is integrally coupled to the left rear of the casing 36. At the left end portion of the casing 36, a left mount portion 37 for the left support portion 12b1 provided on the left side frame 12 of the main frame 11 is provided. The left mount portion 37 is supported (rubber mounted) by the left support portion 12b1 via a bolt 37a extending in the front-rear direction and a rubber bush 37b through which the bolt 37a is inserted. The symbol C3 indicates the axis of the bolt 37a. A rubber mount 37M for supporting the left side of the casing 36 of the distribution mechanism 35 on the vehicle body frame 10 is configured including the left support 12b1, the left mount 37, the bolt 37a and the rubber bush 37b.

At the right end of the casing 36, a right mount 38 for the right support 12b2 provided on the right side frame 12 is provided. The right mount portion 38 is supported (rubber mounted) by the right support portion 12b2 via a bolt 38a extending in the front-rear direction and a rubber bush 38b through which the bolt 38a is inserted. The code C4 indicates the axis of the bolt 38a. A rubber mount 38M for supporting the right side of the casing 36 of the distribution mechanism 35 on the vehicle body frame 10 is configured including the right support 12b2, the right mount 38, the bolt 38a and the rubber bush 38b.
The drive device 30 is mounted inside the main frame 11 via the three mount portions 33M, 37M and 38M described above.

Front and rear drive shafts 35a and 35b extending in the front and rear direction extend in the front and back of the right side portion of the distribution mechanism 35. The front and rear drive shafts 35a and 35b are coaxial with each other. The symbol C5 indicates the axis of the front and rear drive shafts 35a and 35b.
The front end portion of the front drive shaft 35a is supported by a front bearing portion 39a provided on the main frame 11, and the rear end portion of the front propeller shaft 45 is connected to this front end portion via a universal joint. The front end of the front propeller shaft 45 is connected to the front differential mechanism 41 supported by the front frame 14 via a universal joint. Left and right drive shafts 41a extend from the front differential mechanism 41, and the left and right drive shafts 41a are connected to the left and right front wheels FW.

The rear end of the rear drive shaft 35b is supported by a rear bearing 39b provided on the main frame 11, and the front end of the rear propeller shaft 46 is connected to the rear end via a universal joint. The rear end portion of the rear propeller shaft 46 is connected to a rear differential mechanism 42 supported by the rear frame 16 via a universal joint. Left and right drive shafts 42a extend from the rear differential mechanism 42, and the left and right drive shafts 42a are connected to the left and right rear wheels RW.
The front and rear drive shafts 35a and 35b (and consequently the front and rear propeller shafts 45 and 46) of the distribution mechanism 35 and the output shaft 31a of the electric motor 31 are distributed to the left and right across the vehicle left and right center CL.

The driving force of the electric motor 31 is transmitted to the left and right front wheels FW via the distribution mechanism 35, the front propeller shaft 45, the front differential mechanism 41 and the left and right drive shafts 41a, and the distribution mechanism 35, the rear propeller shaft 46, the rear differential It is transmitted to the left and right rear wheels RW via the mechanism 42 and the left and right drive shafts 42a. A clutch case 36a is attached to the right front of the distribution mechanism 35. The clutch case 36a accommodates a dog clutch that switches power transmission to the front propeller shaft 45.

Referring also to FIG. 2, the electric motor 31 is at least partially (rear) disposed between the seat 7 and a second battery 27 described later in the battery 25 in plan view. The electric motor 31 is disposed such that at least a part (in this example, the front part) overlaps the sheet 7 (that is, below the sheet 7) in plan view. Below the sheet 7, at least a part (in this example, the whole) of the distribution mechanism 35 is disposed.
The electric motor 31 is disposed such that at least a part (in the present example, the lower part) overlaps the side frame 12 of the vehicle body frame 10 in side view and overlaps each cross frame 13a, 13b, 13c of the vehicle body frame 10 in front view It is done.

The front and rear differential mechanisms 41 and 42 appropriately distribute the driving force to be transmitted to the left and right drive shafts and the left and right wheels by the differential mechanisms accommodated in the housing.
The rear propeller shaft 46 extends along the front-rear direction. The front propeller shaft 45 extends obliquely with respect to the front-rear direction so as to be positioned on one side (left side, the same side as the electric motor 31) toward the front side. By appropriately setting the lateral positions of the end portions on the differential mechanism side of the front and rear propeller shafts 45 and 46, it is possible to use the periphery of the differential mechanism of the existing vehicle or share the front and rear differential mechanisms 41 and 42 together. is there.

<Battery>
Referring to FIG. 4, the battery 25 includes a first battery 26 disposed below the seat 7 and a second battery 27 disposed behind the first battery 26 (below the seat 7). There is. For example, the first battery 26 and the second battery 27 are configured to include a plurality of unit batteries 25a identical to each other. The unit battery 25a has a rectangular parallelepiped shape whose longitudinal direction is the left-right direction. The unit battery 25a is a mobile battery that is detachable from the vehicle body.

The first battery 26 includes a pair of front and rear unit batteries 25a (hereinafter referred to as a unit battery pair 26a) in each of the left and right side portions of the vehicle body. That is, the first battery 26 includes a total of four unit batteries 25a. The left and right unit battery pairs 26 a are disposed below the seat 7. The left and right unit battery pairs 26a are disposed close to each other so that the front and rear unit batteries 25a are in contact with each other. The left and right unit battery pairs 26a are separated from each other in the left and right direction.

A junction box 61 is disposed in the space between the left and right unit battery pair 26a. The junction box 61 is disposed above at least a portion of the drive device 30 (e.g., the distribution mechanism 35). An ECU 66 is disposed behind the junction box 61. The PDU 62 is disposed below the ECU 66. The PDU 62 and the ECU 66 constitute an integral control unit 66U.

In the space between left and right unit battery pair 26a (the space surrounded by left and right unit battery pair 26a and control unit 66U), in addition to junction box 61, unit wiring 61a branched from junction box 61 to each unit battery 25a, and junction A collective wire 61 b and the like extending from the box 61 to the PDU 62 are disposed.
At least part of the front and rear propeller shafts 45, 46 is disposed below the space between the left and right unit battery pairs 26a in a plan view. That is, the left and right unit battery pairs 26 a are distributed to the left and right so as to sandwich the front and rear propeller shafts 45 and 46.

The second battery 27 includes a pair of left and right unit batteries 25a. The left and right unit batteries 25 a of the second battery 27 are disposed below and behind the seat 7. The left and right unit batteries 25a of the second battery 27 are separated from each other in the left-right direction. The space between the left and right unit batteries 25 a of the second battery 27 is smaller than the space between the left and right first batteries 26. For example, in each of the left and right sides of the vehicle body, the left-right center position of the unit battery 25a of the second battery 27 and the left-right inner end position of the unit battery 25a of the first battery 26 are substantially the same left-right direction position It is in. In a space between the left and right unit batteries 25 a of the second battery 27, a collective wiring 61 b extending in the front-rear direction from the junction box 61 to the PDU 62 is disposed.

The left and right unit batteries 25a of the second battery 27 are displaced upward with respect to the left and right unit battery pairs 26a. For example, the lower end position of the left and right unit battery 25a of the second battery 27 and the center position of the unit battery 25a of the first battery 26 in the vertical direction are at substantially the same vertical position.

The battery 25 generates a predetermined high voltage (48 to 72 V) by connecting a plurality of unit batteries 25a respectively included in the first battery 26 and the second battery 27 in series. Each unit battery 25a is, for example, a lithium ion battery as an energy storage that can be charged and discharged. Each unit battery 25a is inserted in and removed from the outside in the vehicle width direction with respect to the battery case 28 fixed to the vehicle body. The battery case 28 includes a battery insertion and removal opening 28 a that opens toward the outer side in the vehicle width direction, and a lid 28 b that opens and closes the battery insertion and removal opening 28 a. The unit battery 25a is accommodated in the battery case 28 so as to be able to be inserted and removed by sliding movement from the battery insertion and removal opening 28a in the vehicle width direction.

A unit wiring 61a corresponding to each unit battery 25a is connected to a wall 28c on the inner side in the vehicle width direction of the battery case 28. A connection terminal 28c1 is provided on the wall 28c. The connection terminal 28c1 penetrates the wall portion 28c to face the inside of the case, and detachably connects each unit battery 25a and the unit wiring 61a. The corresponding unit wiring 61a is connected to the connection terminal 28c1, and thus the unit battery 61a corresponding to each unit battery 25a is detachably connected via the connection terminal 28c1. The battery case 28 is provided for each unit battery 25a, but may be provided so as to be able to accommodate a plurality of unit batteries 25a. Among the plurality of battery cases 28, one corresponding to the left and right unit battery pair 26a may be referred to as a left and right battery case 28d.

Referring to FIGS. 4 and 8, power from the battery 25 is supplied to the PDU 62 serving as a motor driver via a junction box 61 having a contactor (all not shown) interlocking with the main switch. The power from the battery 25 is converted from direct current to three-phase alternating current by the PDU 62 and then supplied to the electric motor 31 which is a three-phase alternating current motor.
The output voltage from the battery 25 is stepped down via the DC-DC converter 63, and is supplied to the 12V sub battery 64, general electric parts 65 such as lamps, and control system parts such as the ECU 66.
The junction box 61 integrates a plurality of unit wires 61 a extending from the unit batteries 25 a and extends the collective wires 61 b toward the PDU 62. The junction box 61 has fuses corresponding to the individual unit wires 61 a in addition to the contactors.
The PDU 62 includes an inverter and controls energization of the stator winding of the electric motor 31. The PDU 62 is provided with a heat sink.

For example, the unit battery 25a is charged by a charger connected to an AC 100 V power supply in a state of being removed from the vehicle body. In addition, the structure which the electrically-driven vehicle 1 equips with a charger may be sufficient. The unit battery 25a includes a battery managing unit (BMU) 68 that monitors the charge / discharge status, temperature, and the like. The information monitored by the BMU 68 is shared by the ECU 66 when the vehicle is mounted. Output request information from the accelerator sensor 69 is input to the ECU 66. The ECU 66 drives and controls the electric motor 31 via the PDU 62 based on the input output request information.

A plurality of unit wires 61 a extending from each battery case 28 is connected to a junction box 61 between unit battery pairs 26 a. A collective wire 61 b extends rearward from the rear of the junction box 61, and the collective wire 61 b is connected to the PDU 62. A three-phase cable 61 c extends forward from the PDU 62, and the three-phase cable 61 c is routed to the left and connected to the electric motor 31. The electric motor 31 performs the power running operation according to the control by the PDU 62 and causes the electric vehicle 1 to travel.

As described above, the electrically powered vehicle 1 in the above embodiment is provided on the seat 7 on which the occupant is seated, a pair of left and right unit battery pairs 26a arranged on the left and right under the seat 7 in the battery 25, and the vehicle body And a pair of left and right battery cases 28d for detachably holding left and right unit battery pairs 26a.
According to this configuration, since the unit battery pair 26a is distributed to the left and right in the dead space under the seat 7, the capacity of the battery 25 can be easily obtained, and by the left and right distribution arrangement of the unit battery pair 26a which is a heavy object, In particular, the running stability in the roll direction can be improved. Further, the heat generation of the battery 25 can be dispersed and the heat source concentration of the battery 25 can be avoided by the left and right distribution arrangement of the unit battery pair 26a. Furthermore, the unit battery pair 26a can be easily attached and detached from the outer side in the vehicle width direction, and the mobilization of the battery 25 can be facilitated.

Further, in the electrically powered vehicle 1, the left and right unit battery pair 26a is detachable from the left and right battery case 28d by a slide along the left and right direction.
According to this configuration, compared to the configuration in which the left and right unit battery pair 26a is detachable by the vertical movement, the weight at the time of battery attachment and detachment becomes easier to be received by the battery case 28, and attachment and detachment of the battery 25 which is a heavy object Can be made easier.

The electric vehicle 1 further includes propeller shafts 45, 46 extending in the vehicle width direction inside in the front-rear direction, and the left and right unit battery pairs 26a are arranged to sandwich the propeller shafts 45, 46 in the left-right direction.
According to this configuration, the left and right unit battery pairs 26a are distributed to the left and right of the propeller shafts 45, 46 on the inner side in the vehicle width direction, so an efficient layout of the left and right unit battery pairs 26a in a four-wheel drive vehicle is realized. can do.

The electric vehicle 1 further includes a step floor 5 on which the passenger places his / her foot and a step frame 5a for supporting the step floor 5, and the step frame 5a is disposed outside the left and right unit battery pair 26a in the vehicle width direction. A rear upper extension 21c disposed behind the left and right unit battery pair 26a is connected to the rear of the lower side 21a.
According to this configuration, the left and right unit battery pair 26a is disposed on the inner side in the vehicle width direction of the outer disposition portion (lower side portion 21a) of the step frame 5a and disposed in front of the rear disposition portion (rear upper extension portion 21c) As a result, external and rear disturbances to the left and right unit battery pairs 26a can be prevented by using the frame member including the step frame 5a.

In the electric vehicle 1, the electric motor 31 connected to the drive wheels (front and rear wheels FW and RW) and the second battery 27 disposed behind the seat 7 are provided. A portion is disposed between the seat 7 and the second battery 27.
According to this configuration, the electric motor 31 is disposed close to the left and right unit battery pair 26a and the second battery 27, and the electric motor 31 is disposed so as to be surrounded by the plurality of unit batteries 25a. The layout can be made efficient by shortening the distance to the motor 31, and concentration of mass can be achieved.

Further, in the electric vehicle 1, at least a part of the electric motor 31 is disposed below the seat 7, and wraps a position in the front-rear direction with the left and right unit battery pair 26a. At least a portion of the electric motor 31 is disposed below the seat 7 and is disposed so as to overlap the left and right unit battery pair 26a in a side view.
According to this configuration, at least a part of the electric motor 31 is disposed in the dead space under the seat 7, and the position of the unit battery pair 26a under the seat 7 is lapped in the front-rear direction. Also, the space under the seat 7 can be effectively utilized, and the electric motor 31 having a capacity can be disposed, and mass concentration can be achieved. Further, since the unit battery pair 26a and the electric motor 31 which are heavy objects are disposed below the seat 7 disposed at the central portion in the longitudinal direction of the vehicle, it is possible to further concentrate the mass.

In the electric vehicle 1, at least a part (lower part) of the electric motor 31 overlaps the side frame 12 of the vehicle body frame 10 in a side view, and the cross frames 13a, 13b, 13c of the vehicle body frame 10 in a front view It is arranged to overlap with.
According to this configuration, the electric motor 31 and the vehicle body frame member are arranged so as to overlap in a side view and a front view, so that disturbance from the front-rear direction and the vehicle width direction to the electric motor 31 is used Can be prevented.

The electric vehicle 1 further includes a distribution mechanism 35 connected to the electric motor 31, and at least a part of the distribution mechanism 35 is disposed below the seat 7.
According to this configuration, at least a part of the distribution mechanism 35 connected to the electric motor 31 is disposed under the seat 7, so that the dead space under the seat 7 can be used more effectively. Further, since the seat 7 is disposed at the central portion in the longitudinal direction of the vehicle, the distribution mechanism 35, which is a heavy load, is disposed at the central portion in the longitudinal direction of the vehicle, thereby further concentrating the mass.

The electric vehicle 1 further includes propeller shafts 45 and 46 extending in the vehicle longitudinal direction from the distribution mechanism 35, and the electric motor 31 is disposed with the output shaft 31a directed in the vehicle longitudinal direction.
According to this configuration, since the output shaft 31a of the electric motor 31 and the propeller shafts 45 and 46 are arranged substantially in parallel with each other, it is easy to connect the electric motor 31 and the propeller shafts 45 and 46 via the distribution mechanism 35 Thus, power can be efficiently transmitted by shortening the transmission path. In addition, by arranging the output shaft 31a of the electric motor 31 and the propeller shafts 45 and 46 in the front-rear direction, bulkiness in the vehicle width direction can be suppressed, and a compact arrangement can be achieved.

Further, in the electric vehicle 1, the propeller shafts 45 and 46 and the output shaft 31a of the electric motor 31 are disposed to sandwich the center line CL in the vehicle width direction in plan view.
According to this configuration, since the propeller shafts 45 and 46 and the output shaft 31a of the electric motor 31 are laid out with the center line CL in the vehicle width direction interposed therebetween, the heavy electric motor 31 and the propeller shafts 45 and 46 The distribution arrangement improves the running stability, and the distribution mechanism 35 connecting the electric motor 31 and the propeller shafts 45 and 46 straddles the center line CL in the vehicle width direction, so that mass concentration can be achieved.

Further, in the electric vehicle 1, the first rubber mount 33M is provided between the electric motor 31 and the vehicle body frame 10, and the second rubber mounts 37M and 38M are provided between the distribution mechanism 35 and the vehicle body frame 10. ing.
According to this configuration, since the electric motor 31 and the distribution mechanism 35 are supported on the vehicle body frame 10 by the plurality of rubber mounts 33M, 37M, 38M, it is possible to enhance the anti-vibration property of the drive device 30.

The electric vehicle 1 further includes a pair of left and right battery connection terminals 28c1 provided on the inner side in the vehicle width direction of the left and right battery cases 28d to connect the left and right unit battery pairs 26a.
According to this configuration, the battery connection terminal 28c1 connecting the left and right unit battery pair 26a is disposed toward the inside in the vehicle width direction of the left and right battery case 28d, so the battery connection terminal 28c1 is not viewed from the outside in the vehicle width direction. Disturbance is less likely to occur, and the battery connection terminal 28c1 can be well protected.

Further, in the electric vehicle 1, the left and right unit wires 61a corresponding to the left and right unit battery pairs 26a are provided between the left and right battery cases 28d, and the vehicle width of the left and right battery cases 28d is provided to the left and right battery connection terminals 28c1. Left and right unit wires 61a are connected from the inside in the direction.
According to this configuration, the unit wiring 61a leading to the battery connection terminal 28c1 is disposed on the inner side in the vehicle width direction of the left and right battery cases 28d, so that the high voltage wiring can be well protected.

The electric vehicle 1 further includes a junction box 61 that distributes the unit wires 61a toward the left and right battery connection terminals 28c1, and the junction box 61 is disposed between the left and right battery cases 28d.
According to this configuration, since the junction box 61 is disposed between the left and right battery cases 28d, the wiring can be optimized by shortening the unit wiring 61a extending from the junction box 61 to the left and right battery connection terminals 28c1. .

Further, control unit 66U for controlling charging / discharging between electric motor 31 and left / right unit battery pair 26a is provided in the above-mentioned electric vehicle 1, and control unit 66U is disposed at the rear of junction box 61. , Collective wiring 61b extending between junction box 61 and control unit 66U in a region surrounded by junction box 61 and control unit 66U, three-phase cable 61c extending between control unit 66U and electric motor 31, and left / right unit wiring 61a Is arranged.
According to this configuration, the high-voltage electrical wiring is disposed in the space surrounded by the left and right battery cases 28d, the junction box 61 and the control unit 66U, so the electrical wiring is concentrated inside in the vehicle width direction and disturbance is difficult to occur. Thus, high voltage wiring can be well protected.

The present invention is not limited to the above embodiment. For example, the electric vehicle includes not only four-wheeled vehicles but also three-wheeled vehicles (in addition to front one and rear two wheels, front two and rear one wheels) ) May be used.
The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the scope of the present invention, such as replacing the components of the embodiment with known components.

1 electric vehicle 5 step floor 5a step frame 7 seat 10 body frame 12 side frame (body frame member)
13a Front cross frame (body frame member)
13b Rear cross frame (body frame member)
13c Intermediate cross frame (body frame member)
21a lower side (outside placement)
21c Rear upper extension (rear arrangement)
25 battery 25a unit battery 26 first battery 26a unit battery pair (battery)
27 second battery 28 battery case 28c1 battery connection terminal 28d battery case (battery holding portion)
31 Electric motor 31a Output shaft 33M, 37M, 38M Rubber mount 35 Distribution mechanism (transmission mechanism)
45 front propeller shaft 46 rear propeller shaft 61 junction box (distribution box)
61a Unit wiring (battery wiring)
61b Collective wiring (second wiring)
61c Three-phase cable (third wiring)
66U control unit (control unit)
FW front wheel (drive wheel)
RW rear wheel (drive wheel)
CL body left and right center (center line)

Claims (7)

A seat on which an occupant sits;
A battery disposed below the seat,
And an electric motor coupled to the drive wheel,
An electric vehicle, wherein at least a part of the electric motor is disposed to overlap with the battery in a side view. The electric vehicle according to claim 1, wherein the seat is disposed at a central portion in the longitudinal direction of the vehicle. The electric vehicle according to claim 1, wherein at least a part of the electric motor is disposed to overlap with a vehicle body frame member in at least one of a side view and a front view. And a transmission mechanism connected to the electric motor,
The electric vehicle according to any one of claims 1 to 3, wherein at least a part of the transmission mechanism is disposed below the seat. The system further comprises a propeller shaft extending in the vehicle longitudinal direction from the transmission mechanism,
The electric vehicle according to claim 4, wherein an output shaft of the electric motor is disposed along a longitudinal direction of the vehicle. The electric vehicle according to claim 5, wherein the propeller shaft and the output shaft of the electric motor are disposed to sandwich a center line in a vehicle width direction in top view. The first rubber mount portion is provided between the electric motor and the vehicle body frame, and the second rubber mount portion is provided between the transmission mechanism and the vehicle body frame. Electric vehicle described.

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