WO2021145276A1

WO2021145276A1 - Saddled electric vehicle

Info

Publication number: WO2021145276A1
Application number: PCT/JP2021/000435
Authority: WO
Inventors: 和彦小野; 紗織 ▲高▼田; 雄大廣瀬; 翔吾西田; 健二玉木
Original assignee: 本田技研工業株式会社
Priority date: 2020-01-17
Filing date: 2021-01-08
Publication date: 2021-07-22
Also published as: JP7292432B2; JPWO2021145276A1

Abstract

A motorcycle (1) that is a saddled electric vehicle (1) comprising: a swing arm (21) that is connected to a body frame (5) so that a proximal-end side can swing up and down, the swing arm (21) supporting a rear wheel (6) on a distal-end side; and a prime mover component (34) mounted on the proximal-end side of the swing arm (21) with respect to the rear wheel (6), the prime mover component (34) being capable of swinging integrally with the swing arm (21). The prime mover component (34) is provided with an electric motor (30) that causes the saddled electric vehicle (1) to travel, a battery (40) that stores electric power to be supplied to the electric motor (30), and a control device (37) that drivably controls the electric motor (30). Provided between the prime mover component (34) and the rear wheel (6) is a flow path formation section (50) that forms an outside air flow path (50a) in which the lower-end side is narrower than the upper-end side in a side view, the upper-end side of the outside air flow path (50a) being designated as an outside air introduction section (55). The electric motor (30), the battery (40), and the control device (37) are each provided with a heat dissipation section (30b, 37b, 40b) that faces into the outside air flow path (50a).

Description

Saddle-type electric vehicle

The present invention relates to a saddle-riding electric vehicle.
The present application claims priority based on Japanese Patent Application No. 2020-006382 filed in Japan on January 17, 2020, the contents of which are incorporated herein by reference.

Patent Document 1 discloses the following configuration in a saddle-riding electric vehicle. In this configuration, an electric motor for traveling and a battery and a control device for the electric motor are integrally swingable on the swing arm.
Patent Document 2 discloses a configuration in which a condenser case having cooling fins is arranged at a position facing the front end of a drive wheel (rear wheel) in the swing arm.

Japanese Patent No. 5460545 Japanese Patent No. 4202825

By the way, in

Patent Documents

1 and 2 above, when the output of the electric motor is increased, the amount of heat generated by the prime mover parts such as the electric motor, the control device and the battery increases. On the other hand, when the cooling fins are provided in the prime mover parts as in Patent Document 2, a space for taking in the running wind is required in the cooling fins. Then, it is necessary to retract the position of the rear wheels in order to secure space, and it is possible that the wheelbase becomes large, so caution is required.

Therefore, an object of the present invention is to efficiently improve the cooling performance of the prime mover parts while reducing the wheelbase in the saddle-riding type electric vehicle in which the prime mover parts are mounted on the swing arm.

In the first aspect of the present invention, a swing arm (21) that connects the base end side to the vehicle body frame (5) so as to be swingable up and down and supports the rear wheel (6) on the tip side, and the swing arm (21). ), Which is a saddle-mounted electric vehicle (1) equipped with a prime mover component (34) mounted on the base end side of the rear wheel (6) and capable of swinging integrally with the swing arm (21). The prime mover component (34) includes an electric motor (30) that runs the saddle-riding electric vehicle (1), a battery (40) that stores electric power to be supplied to the electric motor (30), and the electric motor. A control device (37) for driving and controlling (30) is provided, and an outside air flow path whose lower end side is narrower than that of the upper end side in a side view is provided between the motor component (34) and the rear wheel (6). The electric motor (30), the battery (40), and the battery (40) are provided with a flow path forming portion (50) that forms (50a) and has an outside air introduction portion (55) on the upper end side of the outside air flow path (50a). Each of the control devices (37) includes heat radiating portions (30b, 37b.40b) facing the outside air flow path (50a).

According to this configuration, it is possible to unitize the prime mover parts including the electric motor, the control device and the battery together with the swing arm. Therefore, it is possible to facilitate the assembly of the vehicle and the electrical connection between the parts. By mounting the heavy motor component on the base end side of the swing arm rather than the rear wheel, it is possible to reduce the influence on the operability of the swing arm. By introducing the outside air from above into the outside air flow path whose lower end side is narrower than that of the upper end side, the flow of the outside air in the outside air flow path is stabilized and the flow velocity is increased, so that the prime mover component can be efficiently cooled. The outside air flow path whose lower end side is narrower than that of the upper end side can be easily formed along the curvature of the front upper portion of the rear wheel. At this time, since the rear wheels move forward as much as possible, it is possible to suppress the expansion of the wheelbase and the increase in size of the vehicle.

In the second aspect of the present invention, in the first aspect, the flow path forming portion (50) has a wind guide fan (51) that allows outside air to flow into the outside air flow path (50a) from above to below. I have.
According to this configuration, since the outside air is positively flowed from the upper side to the lower side in the outside air flow path by the wind guide fan, the prime mover parts can be cooled more efficiently.

A third aspect of the present invention includes a rear fender (28) extending along the outer peripheral portion of the rear wheel (6) in the first or second aspect, and the rear fender (28) is the flow path. A wall portion (36a) that separates the outside air flow path (50a) in the forming portion (50) from the rear wheel (6) side is provided.
According to this configuration, since the flow path forming portion includes the rear fender, it is possible to simplify the component configuration.

A fourth aspect of the present invention is that in any one of the first to third aspects, the flow path forming portion (50) faces the lower end side of the outside air flow path (50a) downward. It is an outside air blowing unit (56) that blows out outside air.
According to this configuration, since the outside air is blown downward, it is difficult for the muddy water or the like wound up from the road surface to enter the outside air flow path, and it is possible to prevent the muddy water or the like from adhering to the heat radiating portion. Therefore, it is possible to maintain good cooling performance of the prime mover parts and reduce the maintenance frequency.

A fifth aspect of the present invention is that in any one of the first to fourth aspects, the motor component (34) is from the upper side to the lower side of the battery (40), the control device (37), and the like. These are arranged in the order of the electric motor (30).
According to this configuration, since the battery is arranged at the uppermost stage of the prime mover component, the battery having a relatively low heat resistant temperature among the prime mover components can be preferentially cooled by the outside air flowing from above to below. After cooling the battery, the control device and the electric motor, which generate a relatively large amount of heat, are cooled, so that the prime mover parts can be cooled efficiently. Since the prime mover parts are arranged in the order in which the battery power is supplied, the length of the electrical wiring between the parts can be efficiently suppressed.

A sixth aspect of the present invention is, in any one of the first to fifth aspects, a main stand (14) that rotates between a used state in which the vehicle body is supported and a stored state in which the vehicle body is not supported. ), The prime mover component (34) is provided with a charging port (38) capable of charging the battery (40), and the charging port (38) is in a state where the main stand (14) is in use. At one time, the charging cord (39) is exposed to the outside of the vehicle body cover (11) so that the charging cord (39) can be connected, and the charging port (38) is at least partially described when the main stand (14) is in the retracted position. The charging cord (39) cannot be connected by hiding inside the vehicle body cover (11).
According to this configuration, when the main stand is in use, the rear suspension makes a full stroke in the extension direction. When the main stand is in the retracted position, the rear wheels touch the ground and the rear suspension strokes in the contraction direction. The charging port is arranged on the swing arm so that the charging port appears and disappears on the outside of the vehicle body cover due to the swing of the swing arm accompanying the operation of the main stand. As a result, when the charging cord is connected to the charging port, it is necessary to stand up using the main stand, so that the vehicle body can be charged in a stable state.

A seventh aspect of the present invention comprises, in the sixth aspect, a stand lock device (15) that locks the rotation of the main stand (14) when it is in use. When the charging cord (39) is connected to the charging port (38), the stand lock device (15) operates by the electric power from the charging cord (39) to rotate the main stand (14). To lock.
According to this configuration, after the charging cord is connected in the standing state using the main stand, the main stand cannot be retracted, so that the stability of the vehicle body during charging can be reliably maintained. Further, when parking using the main stand, it becomes difficult for the rear wheels to touch the ground, so that it is possible to prevent an unintended start when the charging cord is connected.

In the eighth aspect of the present invention, in any one of the first to seventh aspects, the vehicle body is supported in an upright state in which the vehicle body is tilted to one side in the vehicle width direction and the vehicle body is tilted to one side in the vehicle width direction. The prime mover component (34) includes a side stand (13), and the prime mover component (34) has a charging port (38) capable of charging the battery (40) on the other side opposite to the side stand (13) in the vehicle width direction. I have.
According to this configuration, since the charging port faces upward in the standing state using the side stand, it is possible to easily access the charging port and facilitate the charging work.

According to the present invention, in a saddle-riding electric vehicle in which a prime mover component is mounted on a swing arm, it is possible to efficiently improve the cooling performance of the prime mover component while reducing the wheelbase.

It is a left side view of the motorcycle in embodiment of this invention. It is a left side view of the swing unit of the motorcycle. It is a top view of the swing unit. It is a left side view corresponding to FIG. 2 with the main stand upright.

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

<Whole vehicle>
As shown in FIG. 1, the saddle-riding electric vehicle of the present embodiment has, for example, a unit swing type scooter-type motorcycle 1. The motorcycle 1 includes a front wheel 2 which is a steering wheel and a rear wheel 6 which is a driving wheel. The front wheels 2 are supported by a pair of left and right front forks 3 and can be steered by the bar handle 4. The rear wheel 6 is supported by the swing unit 10 and can be driven by the prime mover (electric motor 30) included in the swing unit 10. In the figure, reference numeral 6a is an output shaft (rear wheel axle) along the vehicle width direction of the swing unit 10, reference numeral C1 is the central axis of the rear wheel axle 6a, and reference numeral C2 is a pivot shaft 27 along the vehicle width direction at the front end of the swing unit 10. The central axis and the reference numeral C3 indicate the central axis of the drive shaft of the electric motor 30 along the vehicle width direction.

The swing unit 10 integrally includes an electric motor 30, a belt-type transmission mechanism V that transmits the driving force of the electric motor 30 to the rear wheels 6, and an electric device 35 for driving the electric motor 30. There is. The electric motor 30 is arranged in front of, for example, the outer peripheral front end of the rear wheel 6.

Steering system parts including the bar handle 4, front fork 3, and front wheel 2 are operably supported by the front end of the vehicle body frame 5. The rear wheel 6 is supported by the rear portion of the swing unit 10. The front part of the swing unit 10 is supported by the lower part of the vehicle body frame 5 so as to be swingable up and down. The rear portion of the swing unit 10 is supported on the rear upper portion of the vehicle body frame 5 via a rear cushion 7.

The body frame 5 is formed by integrally joining, for example, a plurality of types of steel materials by welding or the like. The vehicle body frame 5 includes a head pipe 5a located at the front end portion, a down frame 5b extending downward from the head pipe 5a, a lower frame 5c extending rearward from the lower end portion of the down frame 5b to the lower portion of the vehicle body, and a rear portion of the lower frame 5c. The cross frame 5d that extends in the vehicle width direction and connects the rear end of the lower frame 5c to the center in the vehicle width direction, and the left and right that extend backward and upward after extending from both sides of the cross frame 5d in the vehicle width direction. It includes a pair of rear frames 5e.

The motorcycle 1 includes a step floor 9 on which the driver seated on the seat 8 rests his / her feet, a front body FB connected to the front of the step floor 9, and a rear body RB connected to the rear of the step floor 9. A seat 8 is supported on the rear body RB. Above the step floor 9, a straddle space K1 is formed so that the occupant can easily straddle the vehicle body.

The circumference of the vehicle body frame 5 is covered with the vehicle body cover 11. The vehicle body cover 11 includes a front body cover 11a that forms the appearance of the front body FB, a floor cover 11b that forms the step floor 9, and a rear body cover 11c that forms the appearance of the rear body RB.

On the lower left side of the vehicle body, a side stand 13 is provided to support the vehicle body in an upright position tilted to the left. A main stand 14 is provided at the lower part of the vehicle body (for example, the lower part of the swing unit 10) to support the vehicle body in an upright and upright state. In the motorcycle 1 in a standing state using the main stand 14, the rear wheels 6 are separated from the ground and the rear suspension (rear cushion 7) is fully extended.

<Swing unit>
As shown in FIGS. 2 and 3, the swing unit 10 includes a swing arm 21 as a skeleton. The swing arm 21 includes, for example, an arm portion 22 that cantilever supports the rear wheel 6 from the left side. The arm portion 22 is, for example, a transmission case for accommodating the transmission mechanism V. The transmission mechanism V may be exposed to the outside of the swing arm 21. The swing arm 21 does not have to also serve as a case for accommodating the transmission mechanism V and the like. The swing arm 21 may include a pair of left and right arm portions that both hold and support the rear wheels 6. The swing unit 10 is provided with a rear fender 28 that covers the outer circumference of the range passed from the front portion to the upper portion of the rear wheel 6 so as to be integrally swingable.

The electric motor 30 is driven by the electric power of the battery 40. The electric motor 30 is driven at a variable speed by, for example, VVVF (variable voltage variable frequency) control. The electric motor 30 is speed-shift controlled so as to have a continuously variable transmission, but the electric motor 30 is not limited to this. The electric motor 30 may be speed-shift controlled so as to have, for example, a stepped transmission. The swing unit 10 may include a mechanical transmission mechanism using a belt, gears, or the like.

The front lower end portion 24 of the swing arm 21 is supported by a pivot portion 5f at the lower part of the vehicle body frame 5 so as to be swingable up and down via a suspension link 26. In the embodiment, the axis along the vehicle width direction that connects the front lower end portion 24 of the swing arm 21 to the rear end portion of the suspension link 26 is defined as the pivot shaft (swing shaft) 27 of the swing unit 10.

The swing arm 21 is provided with a cross portion 25 extending in the vehicle width direction between the front lower end portion 24 and the front end portion of the rear wheel 6. The cross portion 25 has, for example, a hollow rectangular parallelepiped shape. Inside the cross portion 25, a cylindrical electric motor 30 whose drive shaft is directed to the left-right direction is housed. An equipment storage box 36 for accommodating the electrical equipment 35 is mounted above the cross portion 25. The electric motor 30 is not limited to the configuration accommodated in the cross portion 25, and may be accommodated in the arm portion 22 (transmission case).

The electric device 35 includes a battery 40 and a PCU (Power Control Unit) 37. The battery 40 stores electric power to be supplied to the electric motor 30. The PCU 37 drives and controls the electric motor 30. The battery 40 and the PCU 37 overlap each other, for example, with the battery 40 in the upper stage and the PCU 37 in the lower stage. In this state, the electric device 35 is housed in the device storage box 36. Hereinafter, the electric motor 30, the battery 40, and the PCU 37 may be collectively referred to as a prime mover component 34.

The battery 40 and the PCU 37 each have a rectangular parallelepiped shape that substantially overlaps with the cross portion 25 in a plan view. The battery 40 has a larger vertical dimension than the PCU 37. The battery 40 generates a predetermined high voltage (for example, 48V). The battery 40 is composed of, for example, a lithium ion battery as an energy storage that can be charged and discharged. The battery 40 may be inserted into and removed from the device storage box 36 without tools. The battery 40 can be charged by a charger outside the vehicle while being mounted on the vehicle body. The battery 40 may be rechargeable by a charger outside the vehicle or can be used as a mobile battery in a state of being removed from the vehicle body.

The battery 40 is connected to the PCU 37 via a contactor (electromagnetic switch) or a solid state relay such as a FET. The PCU 37 integrally includes a PDU (PowerDriverUnit) and an ECU (ElectricControlUnit). The battery 40 includes a BMU (Battery Managing Unit) that monitors the charge / discharge status, temperature, and the like. The information monitored by the BMU is shared with the ECU when the battery 40 is mounted on the vehicle body. Output request information from the accelerator sensor is input to the ECU. The ECU drives and controls the electric motor 30 via the PDU based on the input output request information.

The electric power from the battery 40 is supplied to the PDU, which is a motor driver, converted from direct current to three-phase AC, and then supplied to the electric motor 30, which is a three-phase AC motor. A three-phase cable extends from the PDU, and this three-phase cable is connected to the electric motor 30. The electric motor 30 performs power running operation according to the control by the PDU to drive the vehicle. The ECU controls charging / discharging of the battery 40, and switches between supplying electric power to the battery 40 and discharging from the battery 40.

A charging port 38 for detachably connecting a charging cord outside the vehicle is provided on the side surface (right side surface) of the device storage box 36 opposite to the side stand 13 in the left-right direction. The charging port 38 includes a plug receiver 38a that allows the insertion plug 39a at the tip of the charging cord to be inserted and removed from the outside in the vehicle width direction.

At least a part of the charging port 38 is hidden inside the vehicle body cover 11 in the vehicle width direction in a 1G state in which the rear wheel 6 is in contact with the ground and the rear suspension is sunk by the weight of the vehicle (see FIGS. 1 and 2). The charging port 38 cannot connect the charging cord 39 outside the vehicle when the motorcycle 1 is in the 1G state.
The entire charging port 38 is exposed to the outside of the vehicle body cover 11 in the vehicle width direction in an upright state using the main stand 14 (a state in which the rear suspension is fully extended and the rear wheels 6 are floating from the ground) (see FIG. 4). ). The charging port 38 can be connected to the charging cord 39 outside the vehicle when the motorcycle 1 is in the upright state.

The charging port 38 is arranged on the upper rear side of the device storage box 36. By arranging the charging port 38 above the device storage box 36 (above the upper and lower center portions), the charging port 38 can be easily hidden in the vehicle body cover 11.
The charging port 38 is arranged at the rear portion (rearward from the front-rear central portion) of the device accommodating box 36 so as to be as far as possible from the pivot shaft 27. As a result, the amount of movement of the charging port 38 when the rear suspension is expanded and contracted increases, and the charging port 38 tends to appear and disappear with respect to the vehicle body cover 11.

The charging port 38 of the embodiment is arranged at a height at which the entire body cover 11 is exposed to the outside in the vehicle width direction when the main stand 14 is used. That is, the entire charging port 38 is exposed to the outside of the vehicle body cover 11 in the vehicle width direction in a state where the rear suspension is fully extended. This encourages the use of the main stand 14 when charging the battery 40, and ensures that the main stand 14 stabilizes the vehicle body. After charging the battery 40, if the main stand 14 is stored, the charging port 38 becomes inconspicuous, and the influence on the appearance is suppressed.

The charging port 38 may be entirely exposed to the outside of the vehicle body cover 11 in the vehicle width direction in an upright state (inclined state of the vehicle body) using the side stand 13. In this case, the charging port 38 is arranged on the right side surface (the side surface opposite to the side stand 13) of the device storage box 36. In this configuration, the charging port 38 faces upward in the standing state using the side stand 13, and the charging cord 39 can be easily attached and detached. In this configuration, an interlock device that locks the swing of the swing unit 10 when the battery 40 is charged may be further provided.

The motorcycle 1 is provided with a stand lock device 15 that regulates that the main stand 14 is erroneously stored when the battery 40 is charged in the standing state using the main stand 14. The stand lock device 15 engages and disengages a locking member such as a lock pin with respect to the main stand 14 in a state where the main stand 14 is rotated to the used position (vehicle body support position). The stand lock device 15 functions as an interlock device that regulates the storage of the main stand 14 when the battery 40 is charged. The stand lock device 15 makes it impossible for the main stand 14 to rotate to the retracted position by engaging the locking member with the main stand 14 in the used position. This regulates that the main stand 14 is erroneously stored when the battery 40 is charged.

The stand lock device 15 includes a solenoid that operates a locking member such as a lock pin. When the charging cord 39 outside the vehicle is connected to the charging port 38, the solenoid operates by utilizing a part of the supplied electric power. That is, the BMU operates the solenoid at the same time as the start of charging. The solenoid remains in the operating state (stand-locked state) until the user voluntarily stops charging (until the charging cord 39 is removed). As a result, the stand lock device 15 operates reliably when the battery 40 is charged, and the main stand 14 is maintained (fixed) in the used state. As a result, even if the user straddles the vehicle body or loads luggage or the like when charging the battery 40, the rear suspension is prevented from shrinking and the charging cord 39 is prevented from coming off. The solenoid may be operated not only by the electric power supplied from the outside of the vehicle but also by the electric power of the traveling battery 40 or the auxiliary battery.

<Equipment cooling structure>
Next, the cooling structure of the prime mover component 34 such as the battery 40, the PCU 37, and the electric motor 30 will be described.
As shown in FIG. 2, a flow path forming portion 50 is provided between the prime mover component 34 and the rear wheel 6 to form an outside air flow path 50a whose lower end side is narrower than the upper end side in a side view. The rear wall 25a of the cross portion 25 and the rear wall 36a of the equipment storage box 36 are arranged so as to be connected to each other in a flat manner. The front walls of the flow path forming portion 50 on the pivot shaft 27 side are formed by the two

rear walls

25a and 36a.

The rear wall 53 on the rear wheel 6 side of the flow path forming portion 50 is formed by the rear fender 28. For example, standing walls 28a stand forward from both the left and right sides of the rear fender 28. The left and right vertical walls 28a form the left and right side walls of the flow path forming portion 50 on the outer side in the vehicle width direction. The flow path forming portion 50 forms a duct 50b penetrating in the vertical direction, and the internal space of the duct 50b is defined as an outside air flow path 50a.

The flow path forming portion 50 is provided with a wind guide fan 51 at the upper end opening of the duct 50b. The wind guide fan 51 introduces outside air into the duct 50b from above to below. The upper end side of the flow path forming portion 50 is an outside air introduction portion 55. The wind guide fan 51 is not limited to the configuration provided at the upper end of the duct 50b, and may be arranged at the lower end of the duct 50b or at the intermediate portion in the vertical direction. The outside air introduced into the duct 50b flows in the outside air flow path 50a at a higher flow velocity toward the lower side, and is blown downward from the lower end opening of the duct 50b. The lower end side of the flow path forming portion 50 is an outside air blowing portion 56.

The rear end of the electric motor 30 is provided with a heat radiating portion 30b facing the outside air flow path 50a. The heat radiating portion 30b penetrates the rear wall 25a of the cross portion 25 and faces the outside air flow path 50a, for example. The heat radiating unit 30b includes, for example, flat plate-shaped heat radiating fins orthogonal to the vehicle width direction. A plurality of heat radiating fins are provided side by side in the vehicle width direction.
Similarly, at the rear end of the battery 40, for example, a heat radiating portion 40b that penetrates the rear wall 36a of the equipment accommodating box 36 and faces the outside air flow path 50a is provided. At the rear end of the PCU 37, for example, a heat radiating portion 37b that penetrates the rear wall 36a of the equipment accommodating box 36 and faces the outside air flow path 50a is provided.

In the motorcycle 1 having the above configuration, when the battery 40 is charged, the main stand 14 is used to put the vehicle body in an upright state. As a result, the rear suspension is extended and the charging port 38 is exposed to the outside in the vehicle width direction, so that the charging cord 39 outside the vehicle can be connected to the charging port 38.

When the charging cord 39 is connected to the charging port 38, the stand lock device 15 and the air guide fan 51 operate using a part of the power supplied from the charging cord 39. The operation of the stand lock device 15 restricts the rotation of the main stand 14 to the retracted position, and retracts the main stand 14 during charging to prevent the rear suspension from shrinking. By operating the wind guide fan 51, the battery 40 being charged is preferentially cooled. After cooling the battery 40, the outside air sequentially cools the PCU 37 and the electric motor 30, which generate a relatively large amount of heat. At this time, since the outside air flows from above into the outside air flow path 50a which is narrower toward the lower side, the flow of the outside air is stable and the flow velocity is increased, and the prime mover component 34 can be efficiently cooled. The outside air flow path 50a, which is narrower toward the lower side, is easily formed by using the rear fender 28 extending from the front portion to the upper portion of the rear wheel 6. Immediately before the front end of the rear wheel 6, a narrow portion 57 having a narrow front-rear width near the lower end of the outside air flow path 50a is located, so that the position of the rear wheel 6 is not significantly retracted.

As described above, the motorcycle 1 (saddle-riding electric vehicle) in the above embodiment is connected to the vehicle body frame 5 so that the base end side can swing up and down and supports the drive wheels (rear wheels 6) on the front end side. The swing arm 21 is provided with a prime mover component 34 mounted on the base end side (front end side) of the swing arm 21 with respect to the rear wheel 6 and capable of swinging integrally with the swing arm 21. The prime mover component 34 includes an electric motor 30 for traveling the motorcycle 1, a battery 40 for storing electric power to be supplied to the electric motor 30, and a control device (PCU37) for driving and controlling the electric motor 30. A flow path forming portion is formed between the prime mover component 34 and the rear wheel 6 so that the lower end side is narrower than the upper end side in the side view and the upper end side of the outside air flow path 50a is the outside air introduction portion 55. It has 50. The electric motor 30, the battery 40, and the PCU 37 each have

heat radiating portions

30b, 37b, which face the outside air flow path 50a. It is equipped with 40b.

According to this configuration, the prime mover component 34 including the electric motor 30, the PCU 37, and the battery 40 can be unitized together with the swing arm 21. Therefore, it is possible to facilitate the assembly of the vehicle and the electrical connection between the parts. By mounting the prime mover component 34, which is a heavy object, on the base end side of the swing arm 21 with respect to the rear wheel 6, the influence on the operability of the swing arm 21 can be reduced. By introducing the outside air into the outside air flow path 50a from above, the flow of the outside air in the outside air flow path 50a is stabilized and the flow velocity is increased, so that the prime mover component 34 can be efficiently cooled. The outside air flow path 50a can be easily formed along the curvature of the front upper portion of the rear wheel 6. At this time, since the rear wheels 6 move forward as much as possible, it is possible to suppress the expansion of the wheelbase and the increase in size of the vehicle.

In the motorcycle 1 according to the above embodiment, the flow path forming portion 50 includes a wind guide fan 51 that allows outside air to flow into the outside air flow path 50a from above to below.
According to this configuration, since the outside air is positively flowed from above to below in the outside air flow path 50a by the air guide fan 51, the prime mover component 34 can be cooled more efficiently.

The motorcycle 1 in the above embodiment includes a rear fender 28 extending along the outer peripheral portion of the rear wheels 6. The rear fender 28 includes a wall portion (rear wall 36a) that separates the outside air flow path 50a in the flow path forming portion 50 from the rear wheel 6 side.
According to this configuration, since the flow path forming portion 50 is configured to include the rear fender 28, it is possible to simplify the component configuration.

In the motorcycle 1 according to the above embodiment, the flow path forming portion 50 is an outside air blowing portion 56 that blows out the outside air downward from the lower end side of the outside air flow path 50a.
According to this configuration, since the outside air is blown downward, it is difficult for muddy water or the like rolled up from the road surface to enter the outside air flow path 50a. Therefore, it is possible to maintain good cooling performance of the prime mover component 34 and reduce the maintenance frequency.

In the motorcycle 1 according to the above embodiment, the prime mover component 34 arranges the battery 40, the PCU 37, and the electric motor 30 in this order from the upper side to the lower side.
According to this configuration, since the battery 40 is arranged at the uppermost stage of the prime mover component 34, the battery 40 having a relatively low heat resistant temperature among the prime mover components 34 can be preferentially cooled by the outside air flowing from above to below. can. After cooling the battery 40, the PCU 37 and the electric motor 30, which generate a relatively large amount of heat, are cooled, so that the prime mover component 34 can be efficiently cooled. Since the prime mover parts 34 are arranged in the order in which the electric power of the battery 40 is supplied, the length of the electric wiring between the parts can be efficiently suppressed.

The motorcycle 1 in the above embodiment includes a main stand 14 that rotates between a used state in which the vehicle body is supported and a stored state in which the vehicle body is not supported. The prime mover component 34 includes a charging port 38 that enables charging of the battery 40. The charging port 38 is exposed to the outside of the vehicle body cover 11 so that the charging cord 39 can be connected when the main stand 14 is in use. When the main stand 14 is in the retracted position, at least a part of the charging port 38 is hidden inside the vehicle body cover 11 so that the charging cord 39 cannot be connected.
According to this configuration, when the main stand 14 is in use, the rear suspension makes a full stroke in the extending direction. When the main stand 14 is in the retracted position, the rear wheel 6 touches the ground and the rear suspension strokes in the contraction direction. The charging port 38 is arranged on the swing arm 21 so that the charging port 38 appears and disappears on the outside of the vehicle body cover 11 due to the swing of the swing arm 21 accompanying the operation of the main stand 14. As a result, when the charging cord 39 is connected to the charging port 38, it is necessary to use the main stand 14 in an upright state, so that the vehicle body can be charged in a stable state.

The motorcycle 1 in the above embodiment includes a stand lock device 15 that locks the rotation of the main stand 14 when the main stand 14 is in use. When the charging cord 39 is connected to the charging port 38, the stand lock device 15 operates by the electric power from the charging cord 39 to lock the rotation of the main stand 14.
According to this configuration, after the charging cord 39 is connected in the standing state using the main stand 14, the main stand 14 cannot be stored, so that the stability of the vehicle body during charging can be reliably maintained.

The motorcycle 1 in the above embodiment includes a side stand 13 on one side of the vehicle body in the vehicle width direction to support the vehicle body in an upright state in which the vehicle body is tilted to one side in the vehicle width direction. The prime mover component 34 is provided with a charging port 38 capable of charging the battery 40 on the other side opposite to the side stand 13 in the vehicle width direction.
According to this configuration, since the charging port 38 faces upward in the standing state using the side stand 13, the charging port 38 can be easily accessed and the charging work can be facilitated.

The present invention is not limited to the above embodiment. For example,

heat radiating parts

30b, 37b. The 40b may be composed of a water-cooled heat exchanger as well as an air-cooled heat radiating fin. The wind guide fan 51 is not limited to the upper end position of the duct 50b, and may be arranged at an upper and lower intermediate position portion, a lower end position, or the like of the duct 50b.
The saddle-riding vehicle includes all vehicles in which the driver rides across the vehicle body. The saddle-riding vehicle includes not only motorcycles (including motorized bicycles and scooters) but also three-wheeled vehicles (including front two-wheeled and rear one-wheeled vehicles in addition to front one-wheeled and rear two-wheeled vehicles) or four-wheeled vehicles. Vehicles are also included. It also includes vehicles whose prime mover includes an engine (internal combustion engine).
The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as replacing the constituent elements of the embodiment with well-known constituent elements.

1 Motorcycle (saddle-type electric vehicle)
5 Body frame 6 Rear wheel 11 Body cover 13 Side stand 14 Main stand 15 Stand lock device 21 Swing arm 28 Rear fender 30 Electric motor 30b Heat dissipation part of electric motor 34 Motor parts 36a Rear wall (wall part)
37 PCU (control device)
37b PCU (control device) heat dissipation part 38 Charging port 39 Charging cord 40 Battery 40b Battery heat dissipation part 50 Flow path forming part 50a Outside air flow path 51 Wind guide fan 55 Outside air introduction part 56 Blowout part

Claims

A swing arm (21) that is connected to the vehicle body frame (5) so that the base end side can swing up and down and supports the rear wheel (6) on the front end side.
A saddle-riding electric vehicle including a prime mover component (34) mounted on the base end side of the swing arm (21) with respect to the rear wheel (6) and capable of swinging integrally with the swing arm (21). (1)
The prime mover component (34) is
The electric motor (30) that runs the saddle-riding electric vehicle (1) and
A battery (40) for storing electric power supplied to the electric motor (30) and
A control device (37) for driving and controlling the electric motor (30) is provided.
An outside air flow path (50a) whose lower end side is narrower than the upper end side in side view is formed between the prime mover component (34) and the rear wheel (6), and the upper end side of the outside air flow path (50a). Is provided with a flow path forming portion (50) having an outside air introduction portion (55).
Each of the electric motor (30), the battery (40), and the control device (37) is a saddle-mounted electric motor provided with heat radiating portions (30b, 37b.40b) facing the outside air flow path (50a). Vehicle (1).
The saddle-mounted electric vehicle (1) according to claim 1, wherein the flow path forming portion (50) includes a wind guide fan (51) that allows outside air to flow into the outside air flow path (50a) from above to below. ).
A rear fender (28) extending along the outer peripheral portion of the rear wheel (6) is provided.
The rear fender (28) according to claim 1 or 2, further comprising a wall portion (36a) separating the outside air flow path (50a) and the rear wheel (6) side in the flow path forming portion (50). Saddle-riding electric vehicle (1).
The item according to any one of claims 1 to 3, wherein the flow path forming portion (50) is an outside air blowing portion (56) in which the lower end side of the outside air flow path (50a) is an outside air blowing portion (56) that blows out outside air downward. Saddle-riding electric vehicle (1).
The motor component (34) is any one of claims 1 to 4, wherein the battery (40), the control device (37), and the electric motor (30) are arranged in this order from the upper side to the lower side. The saddle-riding type electric vehicle (1) described in.
It is equipped with a main stand (14) that rotates between a used state that supports the vehicle body and a retracted state that does not support the vehicle body.
The prime mover component (34) includes a charging port (38) that enables charging of the battery (40).
The charging port (38) is exposed to the outside of the vehicle body cover (11) when the main stand (14) is in use so that the charging cord (39) can be connected to the charging port (38).
Claim 1 that at least a part of the charging port (38) is hidden inside the vehicle body cover (11) so that the charging cord (39) cannot be connected when the main stand (14) is in the retracted position. The saddle-riding type electric vehicle (1) according to any one of 5 to 5.
A stand lock device (15) for locking the rotation of the main stand (14) when the main stand (14) is in use is provided.
When the charging cord (39) is connected to the charging port (38), the stand lock device (15) operates by electric power from the charging cord (39) to rotate the main stand (14). The saddle-riding type electric vehicle (1) according to claim 6.
A side stand (13) is provided on one side of the vehicle body in the vehicle width direction to support the vehicle body in an upright state in which the vehicle body is tilted to one side in the vehicle width direction.
From claim 1, the prime mover component (34) is provided with a charging port (38) capable of charging the battery (40) on the other side opposite to the side stand (13) in the vehicle width direction. The saddle-riding type electric vehicle (1) according to any one of 7.