JP2019131146A - Saddle-riding type electric vehicle - Google Patents

Abstract

To provide a saddle-riding type electric vehicle which can achieve a preferable seat height and a preferable minimum ground clearance.SOLUTION: A saddle-riding type electric vehicle (100) includes: a front wheel (1) and a rear wheel (2); a vehicle body frame (10); a battery unit (30) disposed at the vehicle body frame; an electric motor (40) which is supplied with electric power from the battery unit to drive the rear wheel; and a mono shock type rear suspension (50) including a rear arm (51) and a rear cushion (52). The vehicle body frame includes: a head tube (11); and a pivot shaft (17) swingably supporting the rear arm. The battery unit is disposed between the head tube and the pivot shaft. The electric motor is disposed below the battery unit in the vehicle body frame. The rear cushion overlaps with the battery unit in a vehicle side view and is disposed at the outer side of the vehicle body frame in a vehicle plan view.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a straddle-type electric vehicle.

  In recent years, various straddle-type electric vehicles such as electric motorcycles have been developed (for example, Patent Document 1). As a result of various studies on the electrification of off-road motorcycles, particularly small off-road motorcycles, the applicant of the present application has found that there is the following demand for small electric off-road motorcycles.

(1) The level of performance required for the rear suspension is high. Conventional suspensions in which a rear cushion is connected to the rear end of each of the pair of rear arms (that is, including two rear cushions) may not satisfy the required running performance.
(2) In order to improve the followability to the road surface, we do not want to place heavy parts such as an electric motor in the unsprung part.
(3) Since the vehicle body itself is small in a small vehicle, it is desirable to use as much space as possible for mounting the battery on the vehicle body.
(4) When attaching and detaching the battery, it is desirable to take out and attach the battery from the upper side of the vehicle body in view of the structure of the vehicle body frame and the fouling property.

JP 2010-83348 A

  However, in order to satisfy all of the above demands (1) to (4), an electric motor and a speed reduction mechanism are disposed below the sprung portion, a rear cushion is disposed thereon, and a battery is disposed thereon. become. Therefore, the height dimension of the vehicle body becomes large, and the seat height becomes too high, or the minimum ground height becomes too low. That is, it is impossible to achieve both a preferable seat height and a preferable minimum ground clearance.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a straddle-type electric vehicle that can achieve both a preferable seat height and a preferable minimum ground clearance.

  A straddle-type electric vehicle according to an embodiment of the present invention includes a front wheel and a rear wheel, a vehicle body frame, a battery unit including a battery and disposed in the vehicle body frame, and power supplied from the battery unit to the rear wheel. An electric motor for driving, and a rear shock suspension that is a monoshock-type rear suspension, and that includes a rear arm that rotatably supports the rear wheel and a rear cushion connected to the rear arm. The battery unit is disposed between the head pipe and the pivot shaft, and the electric motor is mounted on the vehicle body frame. The rear cushion is arranged below the battery unit, and the rear cushion is Overlapping the battery unit, and is disposed outside the said body frame when the vehicle is viewed in a plane.

  In one embodiment, the rear cushion is biased to one side in the vehicle width direction, and the electric motor is biased to the other side in the vehicle width direction.

  Another straddle-type electric vehicle according to an embodiment of the present invention includes a front wheel and a rear wheel, a body frame, a battery unit including a battery and disposed in the body frame, and power supplied from the battery unit to the rear An electric motor that drives the wheel; and a rear suspension that is a monoshock-type rear suspension that rotatably supports the rear wheel, and includes a rear cushion connected to the rear arm, and the vehicle body frame includes: The battery pipe is disposed between the head pipe and the pivot shaft, and the electric motor is connected to the vehicle body frame. The rear cushion is disposed below the battery unit in the vehicle width direction. Offset to one side of definitive, and overlaps the battery unit as viewed from the side of the vehicle, the electric motor is offset to the other side in the vehicle width direction.

  In a certain embodiment, the longitudinal direction of the said battery unit has faced the vehicle front-back direction.

  In one embodiment, the length of the battery unit along the longitudinal direction is not less than half of the distance between the head pipe and the pivot shaft.

  In one embodiment, substantially the entire rear cushion overlaps the battery unit in a side view of the vehicle.

  In one embodiment, the longitudinal direction of the rear cushion faces the vehicle front-rear direction, and the rear end of the rear cushion is connected to the rear arm near the pivot shaft in the vehicle front-rear direction.

  In one embodiment, the straddle-type electric vehicle is disposed on the body frame and controls a motor control unit that controls the operation of the electric motor; and a speed reduction mechanism disposed on the body frame and connected to the electric motor. , And the motor control unit and the speed reduction mechanism are disposed below the battery unit.

  In one embodiment, the motor control unit is positioned in front of the electric motor and overlaps with an upper portion of the electric motor in a front view of the vehicle.

  The straddle-type electric vehicle according to the embodiment of the present invention includes a mono-shock type rear suspension, and thus has excellent running performance. In addition, it is easy to secure a large battery mounting capacity in the battery unit disposed between the head pipe and the pivot shaft. Furthermore, since the electric motor is disposed below the battery unit, that is, the battery unit is disposed above the electric motor, the battery can be easily attached and detached from the upper side. In addition, since the electric motor is disposed on the vehicle body frame, that is, on the sprung portion, road surface followability is improved. Furthermore, in the straddle-type electric vehicle of the present invention, the rear cushion overlaps the battery unit in a side view of the vehicle, and is disposed outside the vehicle body frame in a plan view of the vehicle. Therefore, since the dimension of the vehicle body in the height direction can be reduced, it is possible to achieve both a preferable seat height and a preferable minimum ground clearance.

  The rear cushion is biased to one side in the vehicle width direction, whereas the electric motor is biased to the other side in the vehicle width direction (that is, the electric motor is biased to the side opposite to the rear cushion) ), The deviation of the center of gravity of the vehicle due to the deviation of the rear cushion can be corrected.

  Another straddle-type electric vehicle according to the embodiment of the present invention includes a mono-shock type rear suspension, and thus has excellent running performance. In addition, it is easy to secure a large battery mounting capacity in the battery unit disposed between the head pipe and the pivot shaft. Furthermore, since the electric motor is disposed below the battery unit, that is, the battery unit is disposed above the electric motor, the battery can be easily attached and detached from the upper side. In addition, since the electric motor is disposed on the vehicle body frame, that is, on the sprung portion, road surface followability is improved. Furthermore, in another straddle-type electric vehicle according to an embodiment of the present invention, the rear cushion is biased to one side in the vehicle width direction and overlaps the battery unit in a side view of the vehicle. Therefore, since the dimension of the vehicle body in the height direction can be reduced, it is possible to achieve both a preferable seat height and a preferable minimum ground clearance. Further, since the electric motor is biased to the other side in the vehicle width direction, the bias of the vehicle center of gravity due to the bias of the rear cushion can be corrected.

  The longitudinal direction of the battery unit is preferably directed in the vehicle front-rear direction. That is, it is preferable that the battery unit has a horizontally long shape in a vehicle side view. Since the battery unit has a horizontally long shape, the mounting capacity of the battery can be increased while reducing the height dimension of the vehicle body.

  From the viewpoint of increasing the mounting capacity of the battery, the length along the longitudinal direction of the battery unit is preferably large, and specifically, it is preferably half or more of the distance between the head pipe and the pivot shaft.

  When the length along the longitudinal direction of the battery unit is large, many parts of the rear cushion may overlap the battery unit when viewed from the side of the vehicle, and substantially the entire rear cushion may overlap the battery unit.

  When the saddle type electric vehicle is for off-road use, it is preferable that the load on the road surface is relatively large when landing after jumping, and it is preferable to suppress torsion around the rear arm due to the reaction force of the rear wheel. It is preferable to operate the rear cushion at a site where rigidity is easily secured. Furthermore, when it is assumed that the vehicle travels off-road violently, the rear cushion, which is a heavy object, is preferably close to the center of gravity of the vehicle. Therefore, it is preferable that one end (rear end) of the rear cushion is connected to the rear arm in the vicinity of the pivot shaft in the vehicle front-rear direction.

  From the viewpoint of easily attaching and detaching the battery from the upper side, it is preferable that the motor control unit and the speed reduction mechanism are also arranged below the battery unit.

  When the motor control unit is positioned in front of the electric motor and overlaps the upper portion of the electric motor when viewed from the front of the vehicle, it is easy to apply running air for cooling to both the motor control unit and the electric motor. Become.

  According to the embodiment of the present invention, it is possible to provide a straddle-type electric vehicle that can achieve both a preferable seat height and a preferable minimum ground clearance.

1 is a left side view schematically showing a motorcycle (saddle-type electric vehicle) 100 according to an embodiment of the present invention. 1 is a right side view schematically showing a motorcycle 100. FIG. 1 is a left side view schematically showing a motorcycle 100. FIG. 1 is a top view schematically showing a motorcycle 100. FIG. 1 is a right side view schematically showing a motorcycle 100. FIG. 1 is a left side view schematically showing a motorcycle 100. FIG. 1 is a top view schematically showing a motorcycle 100. FIG. 1 is a left side view schematically showing a motorcycle (saddle-type electric vehicle) 200 according to an embodiment of the present invention. 1 is a top view schematically showing a motorcycle 200. FIG. 1 is a right side view schematically showing a motorcycle 200. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.

(Embodiment 1)
A straddle-type electric vehicle 100 according to the present embodiment will be described with reference to FIGS. 1 and 2. The straddle-type electric vehicle 100 of the present embodiment is an off-road motorcycle. FIG. 1 and FIG. 2 are a left side view and a right side view schematically showing the motorcycle 100, respectively. In the following description and drawings, front, rear, left, right, upper, and lower mean front, rear, left, right, upper, and lower when viewed from the occupant of the motorcycle 100, respectively.

[Overall structure of motorcycle]
As shown in FIGS. 1 and 2, the motorcycle 100 includes a front wheel 1, a rear wheel 2, a vehicle body frame 10, a handle 20, a front fork 22, a rear suspension 50, a vehicle body cover 24, and a seat 26. The motorcycle 100 further includes a battery unit 30, an electric motor 40, a motor control unit 42, and a speed reduction mechanism 44.

  The front fork 22 rotatably supports the front wheel 1. By operating the handle 20, the direction of the front wheel 1 changes.

  The vehicle body frame 10 supports the battery unit 30. Electric power is supplied from the battery unit 30 to the electric motor 40, and the electric motor 40 drives the rear wheel 2 via a belt 48 (or chain) or the like. A motor control unit 42 and a speed reduction mechanism 44 are disposed on the body frame 10. The motor control unit 42 controls the operation of the electric motor 40. The speed reduction mechanism 44 is connected to the electric motor 40.

  The vehicle body frame 10 supports the vehicle body cover 24 and the seat 26. The vehicle body cover 24 covers a part of the vehicle body frame 10. The seat 26 is disposed above the body frame 10.

  The rear suspension 50 is a monoshock type. The rear suspension 50 includes a rear arm 51 that rotatably supports the rear wheel 2, and a rear cushion 52 connected to the rear arm 51.

  Next, the configuration of the motorcycle 100 will be described in more detail with reference to FIGS. 3, 4, and 5. 3, 4, and 5 are a left side view, a top view, and a right side view schematically showing the motorcycle 100, respectively. 3, 4, and 5, the vehicle body cover 24 and the seat 26 are omitted for easy understanding.

[Body frame]
As shown in FIGS. 3, 4, and 5, the vehicle body frame 10 includes a head pipe 11, a pair of left and right upper frames 12, a pair of left and right lower frames 13, a pair of left and right seat rails 14, A first connection frame 15 and a pair of left and right second connection frames 16 are included. The body frame 10 includes a pivot shaft 17 that supports the rear arm 51 so as to be swingable.

  The head pipe 11 is disposed at the front portion of the vehicle body frame 10. A steering shaft 21 is inserted through the head pipe 11. An upper end and a lower end of the steering shaft 21 are connected to the front fork 22. A handle 20 is connected to the upper end of the steering shaft 21. When the rider operates the handle 20, the front fork 22 rotates and the direction of the front wheel 1 changes.

  The pair of left and right upper frames 12 are disposed away from each other in the vehicle width direction (left-right direction). The upper frame 12 extends in the front-rear direction. The front end of the upper frame 12 is connected to the upper part of the head pipe 11. The front end of the upper frame 12 is located above the rear end of the upper frame 12 in a vehicle side view. A pivot shaft 17 is disposed at the rear end of the upper frame 12.

  The pair of left and right lower frames 13 are arranged away from each other in the vehicle width direction (left-right direction). The lower frame 13 extends in the front-rear direction. The front end of the lower frame 13 is connected to the lower part of the head pipe 11. The front end of the lower frame 13 is located above the rear end of the lower frame 13 in a vehicle side view. The rear end of the lower frame 13 is connected to the front portion of the housing 41 that houses the electric motor 40 and the like.

  The pair of left and right seat rails 14 are arranged away from each other in the vehicle width direction (left-right direction). The seat rail 14 supports the seat 26. The seat rail 14 extends in the front-rear direction. A front end of the seat rail 14 is connected to an intermediate portion of the upper frame 12. The front end of the seat rail 14 is located below the rear end of the seat rail 14 in a vehicle side view.

  The pair of left and right first connection frames 15 are arranged away from each other in the vehicle width direction (left-right direction). The first connection frame 15 connects the upper frame 12 and the lower frame 13. The first connection frame 15 extends in the front-rear direction. The front end of the first connection frame 15 is located below the rear end of the first connection frame 15 in a vehicle side view. A front end of the first connection frame 15 is connected to an intermediate portion of the lower frame 13. A rear end of the first connection frame 15 is connected to an intermediate portion of the upper frame 12.

  The pair of left and right second connection frames 16 are arranged away from each other in the vehicle width direction (left-right direction). The second connection frame 16 connects the seat rail 14 and the upper frame 12. The second connection frame 16 extends in the front-rear direction. The front end of the second connection frame 16 is located below the rear end of the second connection frame 16 in a vehicle side view. The front end of the second connection frame 16 is connected to the rear portion of the upper frame 12. The rear end of the second connection frame 16 is connected to the rear portion of the seat rail 14.

[Battery unit]
The battery unit 30 is disposed on the vehicle body frame 10. Specifically, the battery unit 30 is disposed between the head pipe 11 and the rear wheel 2, more specifically, between the head pipe 11 and the pivot shaft 17.

  The battery unit 30 includes a battery 31 and a battery case (battery box) 32.

  The battery 31 is, for example, a lithium ion battery, but is not limited to this. The battery 31 may be detachable from the battery case 32.

  The battery case 32 accommodates the battery 31. The battery case 32 is configured such that the battery 31 can be taken out (or attached) from above. Although a specific configuration for this is not shown here, the battery case 32 includes, for example, a box-shaped case main body that opens upward and a lid that covers the opening of the case main body. When taking out the battery 31 from the battery case 32, first, the seat 26 is removed, then the lid of the battery case 32 is opened, and then the battery 31 is taken out from the case body of the battery case 32.

  The longitudinal direction of the battery unit 30 faces the vehicle front-rear direction. That is, the shape of the battery unit 30 is horizontally long.

  The upper surface 32 a of the battery case 32 is located above the upper frame 12. The lower surface 32 b of the battery case 32 is located below the upper frame 12. The front surface 32 c of the battery case 32 is located in front of the connection portion between the lower frame 13 and the first connection frame 15. The rear surface 32 d of the battery case 32 is located behind the connecting portion between the upper frame 12 and the second connection frame 16.

[Electric motor / deceleration mechanism]
The electric motor 40 is disposed below the battery unit 30 in the body frame 10. The electric motor 40 is located below the upper frame 12 in a vehicle side view. The electric motor 40 is, for example, a three-phase induction motor. The electric motor 40 forms a drive unit together with the speed reduction mechanism 44. The reduction mechanism 44 is, for example, a reduction gear train. The deceleration mechanism 44 is also disposed below the battery unit 30 (below the upper frame 12 in a vehicle side view). The drive unit includes a housing 41 that houses the electric motor 40 and the speed reduction mechanism 44. The front portion of the housing 41 is connected to the rear end of the lower frame 13. The upper portion of the housing 41 is connected to a bracket 18 </ b> A fixed to the vehicle body frame 10 (more specifically, to the rear portion of the first connection frame 15 and the middle portion of the upper frame 12). The drive unit may further include a clutch and a transmission.

[Motor control unit]
A motor control unit (MCU) 42 is disposed below the battery unit 30 (below the upper frame 12 in a vehicle side view). The motor control unit 42 is located in front of the electric motor 40 and overlaps the upper portion of the electric motor 40 when the vehicle is viewed from the front.

  The motor control unit 42 includes, for example, a circuit board and a housing 42a that houses the circuit board. A heat sink 42b is provided on the lower surface of the housing 42a.

  The housing 42a is attached to the vehicle body frame 10 (more specifically, to the lower frame 13 and / or the first connection frame 15) via a bracket (not shown). That is, the motor control unit 42 is supported by the vehicle body frame 10 via the bracket.

[Rear suspension]
The rear arm 51 includes a pair of left and right first support portions 51a, a pair of left and right second support portions 51b, and a third support portion 51c. The 1st support part 51a supports the rear wheel 2 rotatably. The second support portion 51b extends forward from the first support portion 51A. The front end of the second support portion 51 b is connected to the pivot shaft 17. The rear end of the second support portion 51b is continuous with the front portion of the first support portion 51a. The third support portion 51c is located above the second support portion 51b. The third support part 51c extends in a substantially arc shape so as to connect the front part of the right first support part 51a and the front part of the left first support part 51b.

  As shown in FIG. 5, the rear cushion 52 overlaps the battery unit 30 in a side view of the vehicle. Further, as shown in FIG. 4, the rear cushion 52 is disposed outside the vehicle body frame 10 in a vehicle plan view. In the illustrated example, the rear cushion 52 is located on the right side of the vehicle body frame 10. In other words, the rear cushion 52 is biased to one side (right side) in the vehicle width direction. On the other hand, as shown in FIG. 4, the electric motor 40 is biased to the other side (left side) in the vehicle width direction.

  The rear cushion 52 is disposed so as to extend in the front-rear direction. One end (front end) of the rear cushion 52 is connected to a bracket 18B fixed to the vehicle body frame 10 (more specifically, an intermediate portion of the upper frame 12). The other end (rear end) of the rear cushion 52 is connected to a bracket 18C fixed to the third support portion 51c of the rear arm 51. The rear cushion 52 is positioned between the seat rail 14 and the rear portion of the upper frame 12 in a side view of the vehicle and partially overlaps the second connection frame 16.

  As described above, the motorcycle (saddle-type electric vehicle) 100 according to the present embodiment includes the mono-shock type rear suspension 50 and thus has excellent running performance. In addition, it is easy to ensure a large mounting capacity of the battery 31 in the battery unit 30 disposed between the head pipe 11 and the pivot shaft 17. Furthermore, since the electric motor 40 is disposed below the battery unit 30, that is, the battery unit 30 is disposed above the electric motor 40, the battery 31 can be easily attached and detached from the upper side. In addition, since the electric motor 40 is disposed on the vehicle body frame 10, that is, on the sprung portion, road surface followability is improved.

  Furthermore, in the motorcycle 100 of the present embodiment, the rear cushion 52 overlaps the battery unit 30 when viewed from the side of the vehicle, and is disposed outside the body frame 10 when viewed from the vehicle. Therefore, since the dimension of the vehicle body in the height direction can be reduced, it is possible to achieve both a preferable seat height and a preferable minimum ground clearance.

  Further, since the rear cushion 52 is biased to one side in the vehicle width direction, the electric motor 40 is biased to the other side in the vehicle width direction. It can be corrected.

  As illustrated in the present embodiment, the longitudinal direction of the battery unit 30 is preferably directed in the vehicle front-rear direction. That is, it is preferable that the battery unit 30 has a horizontally long shape in a vehicle side view. Since the battery unit 30 has a horizontally long shape, the mounting capacity of the battery 30 can be increased while reducing the height dimension of the vehicle body.

  Here, as shown in FIG. 6, the distance between the head pipe 11 and the pivot shaft 17 (more specifically, the distance from the rear end of the head pipe 11 to the rear end of the pivot shaft 17) is D, and the battery unit 30. Let L be the length along the longitudinal direction. From the viewpoint of increasing the mounting capacity of the battery 30, the length L of the battery unit 30 is preferably large. Specifically, the length L of the battery unit 30 is preferably half or more of the distance D between the head pipe 11 and the pivot shaft 17, and more preferably 3/4 or more.

  When the length L along the longitudinal direction of the battery unit 30 is large, many parts of the rear cushion 52 may overlap the battery unit in a side view of the vehicle, and as illustrated, substantially the entire rear cushion 52 May overlap the battery unit 30.

  The rear end of the rear cushion 52 is preferably connected to the rear arm 51 in the vicinity of the pivot shaft 17 in the longitudinal direction of the vehicle as shown in FIG. 5 for the following reason. When the motorcycle (saddle-type electric vehicle) 100 is for off-road use as in the present embodiment, the road load during landing after jumping is relatively large, and twisting around the rear arm 51 due to rear wheel reaction force is suppressed. Therefore, it is preferable to operate the rear cushion 52 at a portion that is relatively close to the pivot shaft 17 and easily secures rigidity. Furthermore, when it is assumed that the vehicle travels off-road violently, the rear cushion 52, which is a heavy object, is preferably close to the center of gravity of the vehicle. Therefore, one end (rear end) of the rear cushion 52 is preferably connected to the rear arm 51 in the vicinity of the pivot shaft 17 in the vehicle longitudinal direction. Here, “in the vicinity of the pivot shaft 17” specifically refers to the front of the midpoint cp (see FIG. 5) of a virtual straight line connecting the pivot shaft 17 and the axle of the rear wheel 2 in the vehicle longitudinal direction. (Between the midpoint cp and the pivot shaft 17).

  From the viewpoint of easily attaching and detaching the battery 31 from the upper side, as illustrated in this embodiment, not only the electric motor 40 but also the motor control unit 42 and the speed reduction mechanism 44 are arranged below the battery unit. Preferably it is.

  Further, when the motor control unit 42 is positioned in front of the electric motor 40 and overlaps the upper portion of the electric motor 40 in a front view of the vehicle, both the motor control unit 42 and the electric motor 40 travel for cooling. It becomes easy to hit the wind. Therefore, the motor control unit 42 and the electric motor 40 can be suitably cooled.

  In this embodiment, the configuration in which the rear cushion 50 is located on the right side of the vehicle body frame 10 is illustrated. However, even if the rear cushion 50 is located on the left side of the vehicle body frame 10 (that is, the vehicle body frame 10 and the rear suspension 50). Or the like may be reversed left and right).

  Further, in the present embodiment, the configuration in which the electric motor 40 is biased in the vehicle width direction is illustrated, but as illustrated in FIG. 7, a configuration in which the electric motor 40 is not biased in the vehicle width direction is adopted. Good.

(Embodiment 2)
A motorcycle (saddle-type electric vehicle) 200 according to this embodiment will be described with reference to FIGS. 8, 9, and 10. FIGS. 8, 9 and 10 are a left side view, a top view and a right side view, respectively, schematically showing the motorcycle 200. FIG. In FIG. 8, FIG. 9, and FIG. 10, the vehicle body cover 24 and the seat 26 are omitted for easy understanding. Below, it demonstrates centering on the point from which the motorcycle 200 differs from the motorcycle 100 in the first embodiment.

  In the motorcycle 200 of this embodiment, a part of the body frame 10, more specifically, one of the pair of left and right second connection frames 16 (the one arranged on the right side) has the reaction 52 on the outside (right side). ) Is different from the motorcycle 100 of the first embodiment in that it extends so as to detour.

  The motorcycle (saddle-type electric vehicle) 200 according to the present embodiment also includes the mono-shock type rear suspension 50, and thus has excellent running performance. In addition, it is easy to ensure a large mounting capacity of the battery 31 in the battery unit 30 disposed between the head pipe 11 and the pivot shaft 17. Furthermore, since the electric motor 40 is disposed below the battery unit 30, that is, the battery unit 30 is disposed above the electric motor 40, the battery 31 can be easily attached and detached from the upper side. In addition, since the electric motor 40 is disposed on the vehicle body frame 10, that is, on the sprung portion, road surface followability is improved.

  Furthermore, in the motorcycle 200 of the present embodiment, the rear cushion 50 is biased to one side in the vehicle width direction and overlaps the battery unit 30 in a vehicle side view. Therefore, since the dimension of the vehicle body in the height direction can be reduced, it is possible to achieve both a preferable seat height and a preferable minimum ground clearance. Further, since the electric motor 40 is biased to the other side in the vehicle width direction (that is, to the side opposite to the rear cushion 52), the bias of the vehicle center of gravity due to the bias of the rear cushion 40 can be corrected.

  As described above, the motorcycles (saddle-type electric vehicles) 100 and 200 according to the embodiment of the present invention can achieve both a preferable seat height and a preferable minimum ground clearance.

  The straddle-type electric vehicle according to the embodiment of the present invention means an arbitrary vehicle on which an occupant rides and is not limited to a two-wheeled vehicle. The straddle-type electric vehicle according to the embodiment of the present invention may be a type of tricycle (LMW) that changes the traveling direction by tilting the vehicle body.

  According to the embodiment of the present invention, it is possible to provide a straddle-type electric vehicle that can achieve both a preferable seat height and a preferable minimum ground clearance. The embodiment of the present invention can be suitably used for an off-road type motorcycle, and can be particularly suitably used for an off-road type small motorcycle (for example, a seat height of 90 cm or less).

  1: front wheel, 2: rear wheel, 10: body frame, 11: head pipe, 12: upper frame, 13: lower frame, 14: seat rail, 15: first connecting frame, 16: second connecting frame, 17: Pivot shaft, 18A / 18B / 18C: bracket, 20: handle, 21: steering shaft, 22: front fork, 24: body cover, 26: seat, 30: battery unit, 31: battery, 32: battery case, 40: Electric motor, 41: housing, 42: motor control unit, 42a: housing, 42b: heat sink, 44: reduction mechanism, 48: belt, 50: rear suspension, 51: rear arm, 51a: first support, 51b: second Support portion, 51c: third support portion, 52: rear cushion, 100/200: motorcycle Straddle-type electric vehicle)

Claims (9)

With front and rear wheels,
Body frame,
A battery unit including a battery and disposed in the vehicle body frame;
An electric motor which is supplied with electric power from the battery unit and drives the rear wheel;
A mono-shock type rear suspension including a rear arm rotatably supporting the rear wheel and a rear cushion connected to the rear arm;
With
The body frame is
A head pipe,
A pivot shaft for swingably supporting the rear arm;
Including
The battery unit is disposed between the head pipe and the pivot shaft,
The electric motor is disposed below the battery unit in the body frame,
The rear cushion is a straddle-type electric vehicle that overlaps the battery unit in a side view of the vehicle and is disposed outside the body frame in a plan view of the vehicle. The rear cushion is biased to one side in the vehicle width direction,
The straddle-type electric vehicle according to claim 1, wherein the electric motor is biased to the other side in the vehicle width direction. With front and rear wheels,
Body frame,
A battery unit including a battery and disposed in the vehicle body frame;
An electric motor which is supplied with electric power from the battery unit and drives the rear wheel;
A mono-shock type rear suspension including a rear arm rotatably supporting the rear wheel and a rear cushion connected to the rear arm;
With
The body frame is
A head pipe,
A pivot shaft for swingably supporting the rear arm;
Including
The battery unit is disposed between the head pipe and the pivot shaft,
The electric motor is disposed below the battery unit in the body frame,
The rear cushion is biased to one side in the vehicle width direction, and overlaps the battery unit in a vehicle side view,
The electric motor is a straddle-type electric vehicle that is biased to the other side in the vehicle width direction.   The straddle-type electric vehicle according to any one of claims 1 to 3, wherein a longitudinal direction of the battery unit is directed in a vehicle front-rear direction.   The straddle-type electric vehicle according to any one of claims 1 to 4, wherein a length along a longitudinal direction of the battery unit is at least half of a distance between the head pipe and the pivot shaft.   The straddle-type electric vehicle according to any one of claims 1 to 5, wherein substantially the entire rear cushion overlaps the battery unit in a side view of the vehicle. The longitudinal direction of the rear cushion faces the vehicle longitudinal direction,
The straddle-type electric vehicle according to any one of claims 1 to 6, wherein a rear end of the rear cushion is connected to the rear arm in the vicinity of the pivot shaft in the vehicle longitudinal direction. A motor control unit disposed on the body frame and controlling the operation of the electric motor;
A speed reduction mechanism disposed on the body frame and connected to the electric motor;
Further comprising
The straddle-type electric vehicle according to any one of claims 1 to 7, wherein the motor control unit and the speed reduction mechanism are disposed below the battery unit.   The straddle-type electric vehicle according to any one of claims 1 to 8, wherein the motor control unit is positioned in front of the electric motor and overlaps an upper portion of the electric motor in a front view of the vehicle.

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