Electric vehicle

Abstract

To effectively cool at least one of a motor and a control device.SOLUTION: An electric two-wheeled motor vehicle 10 includes: a vehicle body frame 12; a pivot shaft 24 disposed on the vehicle body frame 12; a swing arm 50 including an opening 60 and a storage space 62 communicating with the opening 60; a rear wheel 26 supported by the swing arm 50; a motor 70 stored in the storage space 62 and configured to drive the rear wheel 26; a control device 75 stored in the storage space 62 and configured to control the motor 70; an air duct 80 stored in the storage space 62; and a cooling fan 90 communicating with the opening 60 and configured to feed air to the storage space 62. A first opening 81H opening to the cooling fan 90 is formed in a right end 80R of the air duct 80. A second opening 82H opening to at least one of the motor 70 and the control device 75 is formed in a left end 80L of the air duct 80.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electric vehicle. [Background technology]

[0002] An electric vehicle such as an electric motorcycle includes a motor that drives a drive wheel (e.g., a rear wheel), a battery that supplies power to the motor, and a control device that controls the motor. For example, in the electric motorcycle of Patent Document 1, the motor and the control device are housed in a swing arm that supports the rear wheel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5208653 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the electric motorcycle of Patent Document 1, the swing arm includes an equipment mounting space that houses the motor and the control device, and an air flow space through which air sent from the fan flows, and the equipment mounting space and the air flow space are separated by a partition wall, which causes a problem that the air sent from the fan cannot sufficiently cool the motor and the control device, which are heat-generating components.

[0005] The present invention has been made in consideration of the above-mentioned points, and an object of the present invention is to provide an electric vehicle capable of effectively cooling at least one of a motor and a control device. [Means for solving the problem]

[0006] The electric vehicle of the present invention comprises a body frame, a pivot shaft provided on the body frame, a swing arm supported for swinging on the pivot shaft and having an opening and an accommodation space communicating with the opening, a rear wheel supported by the swing arm, a motor housed in the accommodation space and driving the rear wheel, a control device housed in the accommodation space and controlling the motor, an air duct housed in the accommodation space, and a cooling fan communicating with the opening and sending air to the accommodation space, wherein one end of the air duct is formed with a first opening that opens toward the cooling fan, and the other end of the air duct is formed with a second opening that opens toward at least one of the motor and the control device.

[0007] In the electric vehicle according to the present invention, the first opening formed at one end of the air duct opens toward the cooling fan, and the second opening formed at the other end of the air duct opens toward at least one of the motor and the control device. According to the above aspect, the air sent from the cooling fan can be made to flow to at least one of the motor and the control device via the air duct. This makes it possible to effectively cool the motor and the control device, and to suppress the occurrence of malfunctions in the motor and the control device.

[0008] Another electric vehicle according to the present invention comprises a body frame, a pivot shaft provided on the body frame, a swing arm supported to be swingable on the pivot shaft and having an opening and an accommodation space communicating with the opening, a rear wheel supported by the swing arm, a drive shaft disposed at a rear end of the swing arm and supporting the rear wheel, a motor housed in the accommodation space and driving the rear wheel, a control device housed in the accommodation space and controlling the motor, and a cooling fan communicating with the opening and sending air to the accommodation space, wherein the swing arm is located on one side of the rear wheel in a vehicle width direction and is disposed between the front and rear of the vehicle. the first portion is disposed in a front-rear direction of the vehicle, and a second portion is located forward of the rear wheels and extends from a front end of the first portion toward the other side in the vehicle width direction, at least one of the motor and the control device is disposed in the first portion, the drive shaft is disposed at a rear end of the first portion, the opening is located in the second portion on the opposite side to the motor and the control device disposed in the first portion with respect to a vehicle center line that extends in a front-rear direction of the vehicle in a plan view and passes through the center of the rear wheels in the vehicle width direction, and the cooling fan sends air to the motor and the control device disposed in the first portion.

[0009] According to another electric vehicle of the present invention, the opening is located in the second part of the swing arm on the opposite side of the vehicle center line from at least one of the motor and the control device arranged in the first part of the swing arm in a plan view. A cooling fan communicating with the opening sends air to at least one of the motor and the control device arranged in the first part. According to the above aspect, the air sent from the cooling fan can be made to flow to at least one of the motor and the control device. This makes it possible to effectively cool the motor and the control device, and to suppress the occurrence of malfunctions in the motor and the control device. Effect of the Invention

[0010] According to the present invention, it is possible to provide an electric vehicle capable of effectively cooling at least one of a motor and a control device. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a side view of an electric motorcycle according to one embodiment. [Diagram 2] FIG. 2 is a plan view of the electric motorcycle according to one embodiment. [Diagram 3] FIG. 3 is a cross-sectional view of a swing arm according to one embodiment. [Figure 4] FIG. 4 is a side view of a swing arm according to one embodiment. [Diagram 5] FIG. 5 is a cross-sectional view of a swing arm according to a modified example. [Figure 6] FIG. 6 is a cross-sectional view of a swing arm according to another modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of an electric vehicle according to the present invention will be described with reference to the drawings. Here, an electric motorcycle will be described as an example of an electric vehicle, but the electric vehicle of the present invention is not limited to an electric motorcycle. It should be noted that the embodiment described here is not intended to particularly limit the present invention. Furthermore, the same reference numerals are used for members and parts that perform the same function, and duplicated descriptions will be omitted or simplified as appropriate.

[0013] FIG. 1 is a side view of an electric motorcycle 10. In the following description, unless otherwise specified, the terms front, rear, left, right, top, and bottom refer to the front, rear, left, right, top, and bottom as seen by the rider of the electric motorcycle 10. The symbols F, Rr, L, R, U, and D in the drawings represent the front, rear, left, right, top, and bottom, respectively. The symbol Y in the drawings represents the vehicle width direction. In this embodiment, the vehicle width direction Y is the left-right direction. The symbol X in the drawings represents the vehicle front-rear direction. The vehicle front-rear direction X is a direction perpendicular to the vehicle width direction Y in a plan view. The symbol Z in the drawings represents the up-down direction. The up-down direction Z is a direction perpendicular to the vehicle width direction Y in a front view. However, the above directions are merely defined for convenience and should not be interpreted in a restrictive manner.

[0014] As shown in FIG. 1, the electric motorcycle 10 includes a body frame 12, a pivot shaft 24 provided on the body frame 12, a swing arm 50 supported so as to be swingable on the pivot shaft 24, a battery 30, a body cover 13 that covers the body frame 12, a front wheel 25, and a rear wheel 26.

[0015] As shown in FIG. 1, the body frame 12 includes a handlebar 14, a head pipe 16 extending downward from the handlebar 14, a front fork 18 connected to the lower end of the head pipe 16, a down tube 20 extending downward from the middle of the head pipe 16, and a pair of left and right main pipes 22 connected to the rear end of the down tube 20. A front wheel 25 is rotatably attached to the lower end of the front fork 18. The front wheel 25 constitutes a driven wheel. The main pipe 22 extends diagonally upward and rearward in a side view. A rear cushion 28 is stretched between the rear of the swing arm 50 and the rear of the main pipe 22. A rear wheel 26 is rotatably provided at the rear end of the swing arm 50. The rear wheel 26 constitutes a drive wheel driven by the power of a motor 70, which will be described later.

[0016] 1, the electric motorcycle 10 includes a seat 32 on which a rider sits. The seat 32 is supported by the main pipe 22.

[0017] The battery 30 is a drive source that drives the motor 70, which will be described later. The battery 30 supplies power to the motor 70 via a control device 75, which will be described later. The battery 30 is a chargeable and dischargeable battery. The battery 30 is, for example, a lithium ion battery or a nickel-metal hydride battery. As shown in FIG. 1 , the battery 30 is disposed below the seat 32. The battery 30 is disposed forward of the swing arm 50. The battery 30 is supported by the body frame 12. The battery 30 is supported by, for example, the main pipe 22.

[0018] As shown in Fig. 1, the pivot shaft 24 is provided on the down tube 20 of the body frame 12. The pivot shaft 24 extends in the vehicle width direction Y (see Fig. 2).

[0019] As shown in FIG. 1, a front end 50F of the swing arm 50 (see also FIG. 3) is attached to the pivot shaft 24. The swing arm 50 is configured to be swingable in the vertical direction Z around the pivot shaft 24. The swing arm 50 rotatably supports the rear wheel 26. The swing arm 50 is disposed below the seat 32. As shown in FIG. 2, the swing arm 50 is disposed behind the battery 30.

[0020] As shown in FIG. 3, the swing arm 50 includes a case 51 and a cover 52 that covers the left side surface of the case 51. There is no partition wall between the case 51 and the cover 52. That is, the internal space of the case 51 and the internal space of the cover 52 are continuous. The swing arm 50 has a first portion 55 that extends in the vehicle front-rear direction X and a second portion 56 that extends in the vehicle width direction Y. The first portion 55 is formed by a part of the case 51 and the cover 52. The first portion 55 is located to the left of the rear wheel 26. The second portion 56 is formed by a part of the case 51. The second portion 56 extends rightward from a front end portion 55F of the first portion 55. A right end portion 56R of the second portion 56 is located to the right of the rear wheel 26. The second portion 56 is located forward of the rear wheel 26.

[0021] As shown in Fig. 3, the swing arm 50 has a first chamber 55S and a second chamber 56S which define an accommodation space 62 described below. The first chamber 55S is provided in the first portion 55. The second chamber 56S is provided in the second portion 56. The first chamber 55S and the second chamber 56S are aligned in the vehicle width direction Y. The first chamber 55S is located to the left of the second chamber 56S. The first chamber 55S is in communication with the second chamber 56S.

[0022] As shown in FIG. 3, the swing arm 50 has an opening 60, a storage space 62 communicating with the opening 60, and an exhaust port 68 communicating with the storage space 62. The opening 60 is formed in the case 51. The opening 60 is formed in the second part 56 of the swing arm 50. The opening 60 is formed on the right side of the second part 56. In the second part 56, the opening 60 is located on the opposite side of the control device 75 and the motor 70 described later with respect to the vehicle center line CL in a plan view. That is, the opening 60 is located to the right of the vehicle center line CL. The vehicle center line CL is a line that extends in the vehicle front-rear direction X and passes through the center of the rear wheel 26 in the vehicle width direction Y. The opening 60 opens to the right. As shown in FIG. 2, the opening 60 is located to the right of the battery 30. As shown in FIG. 3, the storage space 62 is formed in the case 51 and the cover 52. The exhaust port 68 is formed in the case 51. The exhaust port 68 is formed in the first portion 55 of the swing arm 50. The exhaust port 68 opens toward the rear. The exhaust port 68 is located rearward of the motor 70. The exhaust port 68 is located rearward of the drive shaft 34, which will be described later.

[0023] As shown in Fig. 3, the electric motorcycle 10 includes a drive shaft 34. The drive shaft 34 extends in the vehicle width direction Y. The drive shaft 34 rotatably supports the rear wheel 26. The drive shaft 34 is disposed at a rear end portion of the swing arm 50. More specifically, the drive shaft 34 is disposed at a rear end portion 55R of a first portion 55 of the swing arm 50.

[0024] As shown in FIG. 3, the electric motorcycle 10 includes a motor 70 that drives the rear wheel 26, a control device 75 that controls the motor 70, an air duct 80, and a cooling fan 90.

[0025] As shown in FIG. 3, the control device 75 is accommodated in the accommodation space 62 of the swing arm 50. The control device 75 is disposed at the front end 55F of the first portion 55 of the swing arm 50. The control device 75 is fixed to the front end 55F by an attachment means (not shown). The control device 75 is accommodated in the first chamber 55S of the swing arm 50. The control device 75 is located to the left of the vehicle center line CL. The control device 75 is connected to the battery 30 (see FIG. 1) by wiring (not shown). The control device 75 controls the drive of the motor 70. That is, the control device 75 controls the drive of the rear wheel 26.

[0026] As shown in FIG. 3, the motor 70 is accommodated in the accommodation space 62 of the swing arm 50. The motor 70 is disposed at the rear end 55R of the first portion 55 of the swing arm 50. The motor 70 is accommodated in the first chamber 55S of the swing arm 50. The motor 70 is located to the left of the vehicle center line CL. The motor 70 is disposed rearward of the control device 75. The motor 70 is disposed forward of the drive shaft 34. A first gear 70G is provided on the rotating shaft 70S of the motor 70. The first gear 70G meshes with a second gear 34G provided on the drive shaft 34. The driving force of the motor 70 is transmitted to the drive shaft 34 (i.e., the rear wheel 26) via the first gear 70G and the second gear 34G. The motor 70 is connected to the control device 75 by wiring (not shown).

[0027] As shown in FIG. 3, the air duct 80 is accommodated in the accommodation space 62 of the swing arm 50. The air duct 80 is disposed in the second portion 56 of the swing arm 50. The air duct 80 is accommodated in the second chamber 56S of the swing arm 50. The air duct 80 is disposed forward of the rear wheel 26. The air duct 80 is disposed to the left of the cooling fan 90. When the opening 60 of the swing arm 50 is the upstream side and the exhaust port 68 of the swing arm 50 is the downstream side, the air duct 80 is disposed downstream of the cooling fan 90. The air duct 80 extends in the vehicle width direction Y. The air duct 80 intersects with the vehicle center line CL in a plan view. A first opening 81H that opens toward the cooling fan 90 is formed at the right end 80R of the air duct 80. The first opening 81H opening toward the cooling fan 90 means that the cooling fan 90 is located on an extension of the first opening 81H. The first opening 81H is located to the right of the vehicle center line CL. A second opening 82H that opens toward at least one of the motor 70 and the control device 75 is formed at the left end 80L of the air duct 80. The second opening 82H of this embodiment opens toward the control device 75. The second opening 82H opening toward the control device 75 means that the control device 75 is located on an extension of the second opening 82H. The second opening 82H is located to the left of the vehicle center line CL. The second opening 82H opens so as to incline to the right as it goes rearward. The opening area of ​​the first opening 81H is larger than the opening area of ​​the second opening 82H. As shown in FIG. 4, at least a part of the air duct 80 overlaps with the control device 75 in a side view of the vehicle. The first opening 81H overlaps at least a portion of the second opening 82H in a side view of the vehicle. In this embodiment, the first opening 81H overlaps the entirety of the second opening 82H in a side view of the vehicle. The second opening 82H overlaps at least a portion of the control device 75 in a side view of the vehicle. In this embodiment, the entirety of the second opening 82H overlaps the control device 75 in a side view of the vehicle.

[0028] As shown in FIG. 3, the cooling fan 90 is accommodated in the accommodation space 62 of the swing arm 50. The cooling fan 90 is disposed in the second portion 56 of the swing arm 50. The cooling fan 90 is accommodated in the second chamber 56S of the swing arm 50. The cooling fan 90 is disposed on the opposite side of the control device 75 with respect to the vehicle center line CL in a plan view. That is, the cooling fan 90 is located to the right of the vehicle center line CL. The cooling fan 90 is disposed to the right of the rear wheel 26. The cooling fan 90 is provided to the left of the opening 60, but may be provided in the opening 60. The rotation axis of the cooling fan 90 extends in the vehicle width direction Y. The cooling fan 90 communicates with the opening 60 of the swing arm 50. Note that a dedicated intake duct may be provided between the cooling fan 90 and the opening 60 to guide the air flowing in from the opening 60 to the intake port of the cooling fan 90. As shown in FIG. 4, the cooling fan 90 overlaps a part of the control device 75 in a side view of the vehicle. The cooling fan 90 may be arranged so as to overlap a part of the motor 70 in a side view of the vehicle, or may be arranged so as to overlap a part of the control device 75 and a part of the motor 70 in a side view of the vehicle. As shown in FIG. 3, the cooling fan 90 sends air to the accommodation space 62 of the swing arm 50. More specifically, the cooling fan 90 sends air outside the swing arm 50 into the accommodation space 62. The cooling fan 90 sends air to at least one of the control device 75 and the motor 70. In this embodiment, the cooling fan 90 sends air to the control device 75 and the motor 70. The air outside the swing arm 50 flows into the accommodation space 62 by the cooling fan 90 as shown by the arrow FL, flows through the air duct 80 in the order of the control device 75 and the motor 70, and is discharged to the outside from the exhaust port 68.

[0029] As described above, in the electric motorcycle 10 of this embodiment, the first opening 81H formed at the right end 80R of the air duct 80 opens toward the cooling fan 90, and the second opening 82H formed at the left end 80L of the air duct 80 opens toward at least one of the motor 70 and the control device 75. According to the above aspect, the air sent from the cooling fan 90 can be made to flow through the air duct 80 to at least one of the motor 70 and the control device 75. This makes it possible to effectively cool the motor 70 and the control device 75, and to prevent malfunctions in the motor 70 and the control device 75.

[0030] In the electric motorcycle 10 of this embodiment, the control device 75 is disposed at the front end 55F of the first portion 55 of the swing arm 50, the drive shaft 34 is disposed at the rear end 55R of the first portion 55 of the swing arm 50, and the air duct 80 is disposed at the second portion 56 of the swing arm 50. According to the above aspect, the air sent from the cooling fan 90 to the control device 75 disposed at the front end 55F of the first portion 55 can be more effectively circulated via the air duct 80 disposed at the second portion 56.

[0031] In the electric motorcycle 10 of this embodiment, the air duct 80 extends in the vehicle front-rear direction X and intersects, in a plan view, with the vehicle center line CL that passes through the center of the rear wheel 26 in the vehicle width direction Y. According to the above aspect, the air taken in from the opening 60 can be more reliably directed to the control device 75.

[0032] In the electric motorcycle 10 of this embodiment, the opening 60 is located in the second portion 56 on the opposite side to the control device 75 with respect to the vehicle center line CL in a plan view. According to the above aspect, the opening 60 can be provided in a portion away from the control device 75, so that more unheated outside air (air present outside the swing arm 50) can flow to the control device 75.

[0033] In the electric motorcycle 10 of this embodiment, the cooling fan 90 is disposed on the opposite side of the vehicle center line CL from the control device 75 in a plan view. According to the above aspect, it is possible to take in more unheated outside air from the opening 60.

[0034] In the electric motorcycle 10 of this embodiment, the opening 60 opens toward the other side (here, the right) in the vehicle width direction Y, and the rotation shaft of the cooling fan 90 extends in the vehicle width direction Y. According to the above aspect, even if a heat-generating component such as the battery 30 is disposed in front of the swing arm 50, air warmed by the heat-generating component is prevented from flowing into the accommodation space 62 through the opening 60. This makes it possible to more effectively cool the control device 75.

[0035] In the electric motorcycle 10 of this embodiment, the second opening 82H of the air duct 80 overlaps with at least a part of the control device 75 in a side view of the vehicle. According to the above aspect, the air from the cooling fan 90 can be sent to the control device 75 more effectively.

[0036] In the electric motorcycle 10 of this embodiment, the first opening 81H of the air duct 80 overlaps with at least a part of the second opening 82H in a side view of the vehicle. According to the above aspect, the air from the cooling fan 90 can be sent to the control device 75 more effectively.

[0037] In the electric motorcycle 10 of this embodiment, the control device 75 is housed in the first chamber 55S of the swing arm 50, the air duct 80 is housed in the second chamber 56S of the swing arm 50, and the control device 75 overlaps with at least a portion of the air duct 80 in a side view of the vehicle. According to the above aspect, air from the cooling fan 90 can be sent to the control device 75 more effectively.

[0038] In the electric motorcycle 10 of this embodiment, the opening 60 is located in the second portion 56 of the swing arm 50 on the opposite side to at least one of the motor 70 and the control device 75 arranged in the first portion 55 of the swing arm 50 with respect to the vehicle center line CL in a plan view. The cooling fan 90 communicating with the opening 60 sends air to at least one of the motor 70 and the control device 75 arranged in the first portion 55. According to the above embodiment, the cooling fan 90 can cause unheated outside air to flow to at least one of the motor 70 and the control device 75. This can effectively cool the motor 70 and the control device 75, and can prevent malfunctions in the motor 70 and the control device 75.

[0039] In the electric motorcycle 10 of this embodiment, a first opening 81H opening toward the cooling fan 90 is formed at the right end 80R of the air duct 80, and a second opening 82H opening toward at least one of the motor 70 and the control device 75 disposed at the front end 55F is formed at the left end 80L of the air duct 80. According to the above aspect, the air sent from the cooling fan 90 through the air duct 80 can be effectively directed toward at least one of the motor 70 and the control device 75.

[0040] In the electric motorcycle 10 of this embodiment, the control device 75 is housed in the first chamber 55S of the swing arm 50, the air duct 80 is housed in the second chamber 56S of the swing arm 50, and the control device 75 overlaps with at least a portion of the air duct 80 in a side view of the vehicle. According to the above aspect, air from the cooling fan 90 can be sent to the control device 75 more effectively.

[0041] In the electric motorcycle 10 of this embodiment, the cooling fan 90 overlaps at least a portion of at least one of the control device 75 and the motor 70 in a side view of the vehicle. According to the above aspect, air from the cooling fan 90 can be sent to the control device 75 and / or the motor 70 more effectively.

[0042] In the electric motorcycle 10 of this embodiment, the control device 75 and the motor 70 are disposed in the first portion 55, and the opening 60 is located on the opposite side of the vehicle center line CL from the control device 75 and the motor 70 disposed in the first portion 55 in a plan view. According to the above embodiment, the opening 60 can be provided in a portion away from the control device 75 and the motor 70, so that more unheated outside air can flow to the control device 75 and the motor 70.

[0043] In the electric motorcycle 10 of this embodiment, the opening 60 is formed in the second portion 56 on the other side surface in the vehicle width direction Y (for example, the right side surface). According to the above aspect, even if a heat-generating member such as the battery 30 is disposed in front of the swing arm 50, air warmed by the heat-generating member is prevented from flowing into the accommodation space 62 through the opening 60. This makes it possible to more effectively cool the control device 75.

[0044] In the electric motorcycle 10 of this embodiment, the rotation axis of the cooling fan 90 extends in the vehicle width direction Y. According to the above aspect, air can be made to flow from the opening 60 toward the accommodation space 62 more effectively.

[0045] Although the preferred embodiments of the present invention have been described above, the above-described embodiments are merely examples, and the present invention can be embodied in various other forms.

[0046] In the above-described embodiment, the second opening 82H of the air duct 80 is open toward the control device 75, but is not limited thereto. For example, the second opening 82H of the air duct 80 may be open toward the motor 70. Also, as shown in FIG. 5, the second opening 82H of the air duct 80 may include a control device opening 82H1 that opens toward the control device 75 and a motor opening 82H2 that opens toward the motor 70. In this case, the air sent from the cooling fan 90 is sent to the control device 75 through the control device opening 82H1 and to the motor 70 through the motor opening 82H2.

[0047] In the above-described embodiment, the opening 60 is open toward the right, but is not limited thereto. For example, as shown in Fig. 6, the opening 60 may be open toward the front. In the example shown in Fig. 6, the opening 60 overlaps with the vehicle center line CL.

[0048] In the above-described embodiment, the electric motorcycle 10 has the air duct 80 housed in the housing space 62 of the swing arm 50, but the electric motorcycle 10 does not necessarily have to have the air duct 80. In this case, the cooling fan 90 is disposed so as to be able to send air directly to at least one of the control device 75 and the motor 70. For example, the cooling fan 90 is disposed in the housing space 62 so that the control device 75 and / or the motor 70 are located on an extension line of the rotation axis of the cooling fan 90.

[0049] In the above-described embodiment, the case 51 and the cover 52 are continuous and are not separated by a partition wall, but the case 51 and the cover 52 may be separated by a partition wall. In this case, the partition wall may be provided with a communication hole that communicates the case 51 and the cover 52. The motor 70 may be disposed so as to penetrate the partition wall. The control device 75 may be disposed on the surface of the partition wall facing the cover 52. In this case, the control device 75 is indirectly cooled through the partition wall by air discharged from the air duct 80. By forming the partition wall from an aluminum alloy, the cooling performance of the control device 75 is improved. [Explanation of symbols]

[0050] 10 Electric motorcycles (electric vehicles) 12 Body frame 24 Pivot Axis 26 Rear wheel 34 Drive shaft 50 Swingarm 55 Part 1 55S Room 1 55F front end 55R rear end 56 Part 2 56S Room 2 60 Opening 62 Containment Space 70 Motor 75 Control Device 80 Air Duct 80R right end (one end) 80L Left end (other end) 81H 1st opening 82H 2nd opening 90 Cooling fan

Claims

1. The vehicle frame, A pivot shaft provided on the vehicle body frame; a swing arm supported by the pivot shaft so as to be capable of swinging, the swing arm having an opening and an accommodation space communicating with the opening; A rear wheel supported by the swing arm; a motor that is accommodated in the accommodation space and drives the rear wheels; A control device that is accommodated in the accommodation space and controls the motor; an air duct accommodated in the accommodation space; a cooling fan communicating with the opening and sending air into the storage space; a first opening portion is formed at one end of the air duct, the first opening portion being open toward the cooling fan; The other end of the air duct has a second opening formed therein, the second opening opening toward at least one of the motor and the control device.

2. a drive shaft disposed at a rear end of the swing arm and supporting the rear wheel; The swing arm is a first portion located on one side of the rear wheel in a vehicle width direction and extending in a vehicle front-rear direction; a second portion located forward of the rear wheel and extending from a front end portion of the first portion toward the other side in the vehicle width direction, The control device is disposed at the front end of the first portion; The drive shaft is disposed at a rear end of the first portion, The electric vehicle according to claim 1 , wherein the second portion is provided with the air duct.

3. The electric vehicle according to claim 2 , wherein the air duct extends in a front-rear direction of the vehicle and intersects, in a plan view, with a vehicle center line that passes through a center of the rear wheel in the vehicle width direction.

4. The electric vehicle according to claim 3 , wherein the opening is located in the second portion on an opposite side to the control device with respect to a center line of the vehicle in a plan view.

5. The electric vehicle according to claim 4 , wherein the cooling fan is disposed on an opposite side to the control device with respect to a center line of the vehicle in a plan view.

6. The opening portion opens toward the other side in the vehicle width direction, The electric vehicle according to claim 5 , wherein a rotation shaft of the cooling fan extends in the vehicle width direction.

7. The electric vehicle according to claim 6 , wherein the second opening of the air duct overlaps with at least a portion of the control device in a side view of the vehicle.

8. The electric vehicle according to claim 7 , wherein the first opening of the air duct overlaps with at least a portion of the second opening in a side view of the vehicle.

9. The swing arm includes a first chamber and a second chamber that define the accommodation space, The first chamber and the second chamber are aligned in a vehicle width direction, The control device is accommodated in the first chamber, The air duct is housed in the second chamber, The electric vehicle according to claim 1 , wherein the control device overlaps with at least a portion of the air duct in a side view of the vehicle.

10. The vehicle frame, A pivot shaft provided on the vehicle body frame; a swing arm supported by the pivot shaft so as to be capable of swinging, the swing arm having an opening and an accommodation space communicating with the opening; A rear wheel supported by the swing arm; a drive shaft disposed at a rear end of the swing arm and supporting the rear wheel; a motor that is accommodated in the accommodation space and drives the rear wheels; A control device that is accommodated in the accommodation space and controls the motor; a cooling fan communicating with the opening and sending air into the storage space; The swing arm is a first portion located on one side of the rear wheel in a vehicle width direction and extending in a vehicle front-rear direction; a second portion located forward of the rear wheel and extending from a front end portion of the first portion toward the other side in the vehicle width direction, At least one of the motor and the control device is disposed in the first portion; The drive shaft is disposed at a rear end of the first portion, the opening is located in the second portion on an opposite side to at least one of the motor and the control device disposed in the first portion with respect to a vehicle center line that extends in the front-rear direction of the vehicle in a plan view and passes through a center of the rear wheel in the vehicle width direction, The cooling fan sends air to at least one of the motor and the control device disposed in the first portion.

11. An air duct is provided in the storage space, a first opening portion is formed at one end of the air duct, the first opening portion being open toward the cooling fan; The electric vehicle according to claim 10 , wherein the other end of the air duct is formed with a second opening that opens toward at least one of the motor and the control device that are disposed in the first portion.

12. The swing arm includes a first chamber and a second chamber that define the accommodation space, The first chamber and the second chamber are aligned in the vehicle width direction, The control device is accommodated in the first chamber, The air duct is housed in the second chamber, The electric vehicle according to claim 11 , wherein the control device overlaps with at least a portion of the air duct in a side view of the vehicle.

13. The electric vehicle according to claim 10 , wherein the cooling fan overlaps at least a portion of at least one of the control device and the motor in a side view of the vehicle.

14. the controller and the motor are disposed in the first portion; The electric vehicle according to claim 10 , wherein the opening is located on an opposite side to the control device and the motor, which are disposed in the first portion, with respect to a center line of the vehicle in a plan view.

15. The electric vehicle according to claim 10 , wherein the opening is formed in the second portion on a side surface on the other side in the vehicle width direction.

16. The electric vehicle according to claim 15, wherein a rotation shaft of the cooling fan extends in the vehicle width direction.

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