JP2000309292A - Two-wheeled vehicle with electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve overstridability by a passenger and to improve handling performance with low center of gravity, and to make a battery installable on a frame of a two-wheeled vehicle without increasing the size of the battery, as well as to shorten the wiring between a motor and the battery. SOLUTION: In this two-wheeled vehicle, a vehicle frame is made up of a pipe frame 11F that extends in a rear bottom direction from a head pipe 12 supporting a front wheel 14F and that bends downward, and a frame that extends upward from a rear portion of the pipe frame 11F so as to support a seat 18. In this case, an electric motor unit 20 is mounted below the seat 18 at a rear portion of the pipe frame. Also, a battery (battery box) is disposed on a straight portion of the vehicle frame along the vehicle frame, and a contact point of the battery is provided on the side of the electric motor unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle with an electric motor.

[0002]

2. Description of the Related Art Conventionally, as an electric motorcycle,
No. 95283 is disclosed. The technology disclosed in this publication is an electric bicycle with a pedal, in which a motor is disposed at a high position below a saddle, a battery is disposed in front and rear in a concave portion of a frame having no floor portion, and an axle of front and rear wheels is provided. This is the same arrangement as that of the above, or a higher-order arrangement.

[0003]

In the prior art described above, a heavy motor is disposed at a high position directly below a saddle, and a roller is pressed against a rear wheel rim by driving the motor so that the rear wheel is driven by the motor. This is an assisted bicycle, in which a battery is disposed in a concave portion of a bicycle frame. Therefore, when the battery is in the concave portion of the bicycle frame,
The arrangement configuration is the same as or higher than the axles of the front and rear wheels, and is relatively high in the concave portion of the bicycle frame. Therefore, it is hard to say that the straddling property is the best. In addition, since the heavy motor is disposed at a high position directly below the saddle, there is a possibility that the center of gravity may be increased, and the maneuverability of the motorcycle may be reduced. Furthermore, the battery is located in the recess of the bicycle frame, while the motor is located at a higher position, as described above, so that the wiring between them is longer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to improve the straddling property, to lower the center of gravity by arranging the motor and battery at a lower position, and to improve the maneuverability. It is an object of the present invention to provide a two-wheeled vehicle with an electric motor in which the battery is housed in the frame without prominently projecting the external appearance of the battery and the wiring between the motor and the battery can be shortened.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is a pipe frame extending rearward and downward from a head pipe supporting a front wheel and bent downward, and a pipe frame above a rear portion of the pipe frame. An electric motor unit is mounted below the seat at the rear of the pipe frame, and a battery is mounted on the straight portion of the body frame along the body frame. And the battery contacts are provided on the electric motor unit side.

According to the first aspect, since the pipe frame is bent downward, the center of gravity is low, the straddling property of the frame is good, and the motor of the heavy object has a low center of gravity near the center below the seat of the motorcycle. The battery placed along the body frame can be mounted without prominent appearance and has contacts on the side close to the motor. Wiring is short.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of the electric motorcycle. In FIG. 1, reference numeral 11 denotes a body frame, and the body frame 11 is formed by connecting a front frame 11F and a rear frame 11R. The front frame 11F is formed of a pipe bent in a substantially L-shape when viewed from the side.
2 is fixed.

A front fork 13 supports a front wheel 14F so as to be steerable by a handle 15 on the head pipe 12, and a control box 17 containing a control device 16 to be described later is provided at the front of the head pipe 12 at the center of the front wheel 14F. It is fixed behind the axis C. In the front frame 11F, the front portion 11a is extended slightly downward from the rear surface of the head pipe 12 while being slightly inclined rearward.
(A curved L-shape when viewed from the opposite side) and extends rearward to form a lower straight portion 11b.

The rear frame 11R has a substantially "shape" when viewed from the side, and includes an upright portion 11c, which is connected to the lower end of the lower straight portion 11b of the front frame 11F and has a lower end connected to the lower end thereof. Higher part 1 extending backward from the upper end of the
1d. The front frame 11F and the rear frame 11R are formed of a pipe material and are formed of a pipe frame. A seat 18 and a carrier 19 are provided on an upper portion 11d of the rear frame 11R, and a rear wheel 14R is swingably supported by a swing unit 20 at a lower end of the upright portion 11c.

The swing unit 20 has a front portion swingably connected to a rear frame 11R and supports a rear wheel 14R at a rear portion. A cushion unit 21 is provided between the swing unit 20 and a rear portion of an upper portion 11d of the rear frame 11R. I have. FIG.
, The axle of the front wheel 14F is indicated by Af, and the axle of the rear wheel 14R is indicated by Ar. The body frame 11 is provided with a front cover 22 at the front of the front frame 11F, a floor panel 23 at the rear of the front frame 11F, and a rear cover 24 at the rear frame 11R.

A front cover 22 covers instruments not shown and the above-mentioned control box 17, and a floor panel 23 extends forward and backward substantially in line with a line H connecting the axles Af and Ar of the front and rear wheels 14F and 14R. And rear cover 24
Covers the rear wheel 14R and also functions as a rear fender. Although the front cover 22 is not explicitly shown in the drawing,
An intake hole for guiding traveling wind to the control device 16 in the control box 17 is formed at the front. In FIG. 1, reference numeral 25 denotes a front fender, and reference numeral 26 denotes a stand.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. Referring to FIG. 1, the floor panel 23 will be described.
Below the battery box 27, a support plate 28
And is fixed to the front frame 11F via the. The central part in the width direction (left-right direction) of the bottom plate 27a and the support plate 28 of the battery box 27 is curved upwardly in a semicircular shape and bulges upward. The curved parts 27b and 28a are used to form a front frame 11F made of one pipe material. Is supported so as to straddle the lower straight portion 11b.

The battery box 27 has an upper opening, and a lid 29 is attached to the upper opening so as to be openable and closable.
30R (represented by a number without a subscript if necessary) is accommodated. The batteries 30L and 30R are symmetrical to the left and right of the lower straight portion 11b of the front frame 11F, and
The center of gravity is disposed below the line connecting the axles Af and Ar. Specifically, the batteries 30L and 30R are arranged such that the entire battery is located below a line connecting the axles Af and Ar. These batteries 30 are connected to the control device 16 as described later.

FIG. 3 is a cross-sectional plan view of the power system. As shown in FIG. 3, the swing unit 20 has a DC motor 32 fixed to a front portion of a case 31 and substantially constitutes an electric motor unit. The unit 20 has a rear wheel 1
The 4R axle Ar is supported, and the output shaft 3 of the DC motor 32 is supported.
2a is axle A through a belt-type continuously variable transmission 33, a clutch 34 and a decelerator groove 35 disposed in a case 31.
r. The DC motor 32 has windings on a stator and a rotor, respectively, and these windings are connected to the control device 16. The DC motor 32 is supplied with power from the battery 30 via the control device 16, and the current supplied to the winding is controlled by the control base 16 according to the running state.

The continuously variable transmission 33 is constructed by mounting a belt 38 between a drive pulley 36 and a dry pulley 37, and the drive pulley 36 is connected to the output shaft 32 of the DC motor 32.
a, the driven pulley 37 is connected to the input shaft 39 of the speed reduction mechanism 35;
It is provided in. The continuously variable transmission 33 includes pulleys 36, 3
7 each have a fixed face and a movable face movable in the axial direction with respect to the fixed face;
The movable face 7 moves in the axial direction to change the gear ratio.
The clutch 34 is a centrifugal clutch that connects the clutch inner 41 and the clutch outer 42 in response to the rotation speed of the weight roller 40. The clutch 34 is provided coaxially with the input shaft 39 described above, and
Reference numeral 1 denotes a drain pulley 37 and a clutch outer 42 is connected to the input shaft 39 so as to be rotatable.

The reduction mechanism 35 includes a gear 39a fixed to the input shaft 39 and gears 43a, 43 fixed to the intermediate shaft 43.
b, a gear 39 fixed to the axle Ar
a, 43a and gears 43b, 44 mesh with each other to form an axle Ar
Reduce the power transmitted to the motor. The DC motor 32, the continuously variable transmission 33, the clutch 34, and the reduction mechanism 3
5 is described in detail in the patent application (name: electric motor vehicle) filed on July 13, 1999 by the present applicant, so that the description is simplified. The motor may be a brushless DC motor.

FIG. 4 shows a first embodiment of the control device. The control device 16 includes, as shown in FIG.
5. Indicator light 46, liquid crystal meter 47 and sound generator 48
These are connected in parallel to the battery 30 via the main switch 49. The drive circuit 45 is connected to the winding of the DC motor 32, and supplies a current having a duty factor corresponding to the operation of the accelerator grip (accelerator opening) from the battery 30 to the DC motor 32. The drive circuit 45 stores, for example, a vehicle speed versus duty factor characteristic as shown in FIG. 15 showing the control characteristic of the DC motor as a control map, and controls the duty factor according to the accelerator opening according to the control map. I do.

The indicator light 46 is turned on when the main switch 49 is closed to indicate that the main switch 49 is closed. Similarly, the liquid crystal meter 47 indicates that the main switch 49 is in the closed state, and the sound generator 48
Indicates that the main switch 49 has been operated by a sound such as a buzzer for a predetermined time when the main switch 49 is closed. The control device 16 displays the closed state of the main switch 49 with the indicator lamp 46 or the like.
Inconvenience such as forgetting to cut 9 can be prevented, and an appropriate current is supplied at the time of starting or the like because the duty factor is controlled according to the map.

In the motorcycle with an electric motor according to the present invention, the pipe frame (the front frame 11) is provided.
Since F) is bent downward, it has a low center of gravity and good straddling performance. Since the heavy motor (electric motor unit) is disposed near the center at the low center of gravity below the seat of the motorcycle, the handling becomes good. The heavier battery 30 is connected to the lower front frame 1.
Since the battery is arranged along the lower straight portion on the first floor, the battery can be mounted without prominently projecting its appearance. In addition, since the battery has a contact on the side near the motor, the wiring can be short. Since the center of gravity is located below the line H connecting the axles Af and Ar of the front and rear wheels 14F and 14R below the floor panel 23 and is arranged along the lower straight portion of the lower front frame 11F. Also, the center of gravity of the vehicle as a whole can be reduced, and the battery 30 can be easily attached and detached.

In the motorcycle with an electric motor according to the embodiment of the present invention, since a control box 17 for accommodating a control device 16 is provided at the front of the head pipe 12, switches and meters provided near the handle 15 are provided. Can be shortened. Furthermore, a ventilation hole or the like is provided in the cover 22 or the like to guide the traveling wind to the control device 16, and high cooling performance can be obtained.

The above-described control device 16 is not limited to the embodiment shown in FIG. 4, but may be, for example, the embodiment shown in FIG. 5, the embodiment shown in FIG. 6, the embodiment shown in FIG. It is also possible to configure them in the form or the form shown in FIG. 9, or to combine these forms.

FIG. 5 is a diagram showing a control device 16 according to a second embodiment. In the control device 16 shown in FIG. 5, a changeover switch 50 is connected in series with a main switch 49, and a solenoid 51 a of a relay 51 and a thyristor 52 are connected to the main switch 49 in series. Selector switch 50
Connects terminal 1 alternatively to terminal 2 or terminal 3,
The terminal 1 is connected to the main switch 49, the terminal 2 is connected to the start position lamp 54 and the gate of the thyristor 52 via the start switch 53, and the terminal 3 is connected to the running position lamp 55 and the drive circuit via the normally open contactor 51b of the relay 51. 45 (see FIG. 4 above).
The changeover switch 50 includes, for example, a main switch 49
It is also possible to automatically switch to a position where the terminal 1 and the terminal 2 are connected when the power supply is turned on.

When the changeover switch 50 is operated to the start position where the terminals 1 and 2 are connected and the start switch 53 is closed, the start position lamp 54 is turned on and the thyristor 52 is turned on. (O
N). Thereafter, when the changeover switch 50 is operated to the traveling position where the terminals 1 and 3 are connected, the relay 51
Of the traveling position lamp 5 is closed.
5 lights up, and the driving circuit 45 is connected to the battery 30 to be in a runnable state. Therefore, the driver can perform the starting operation in two motions.

FIG. 6 is a diagram showing a third embodiment of the control device. The control device 16 shown in FIG.
A temperature sensor 56 for detecting the temperature of the drive circuit 45 and a temperature sensor 57 for detecting the temperature of the drive circuit 45. The detection signals of the temperature sensors 56 and 57 are processed by a controller 58 comprising a one-chip microcomputer or the like, and are processed by the DC motor 32. Is controlled. Further, the temperature is displayed by a temperature meter 59 or an overheat indicator lamp 60 connected to the controller 58. When the temperature of the DC motor 32 or the drive circuit 45 exceeds the allowable temperature, the controller 16
Is determined, the current supplied to the DC motor 32 is limited or stopped, and an alarm is issued by the lamp 60.

FIG. 7 is a diagram showing a fourth embodiment of the control device. The control device 16 shown in FIG. 7 connects an accelerator sensor 61 for detecting an accelerator opening and an accelerator warning light 62 to a controller 58, and the controller 58 controls the drive circuit 45 and the lighting of the warning light 62 based on the accelerator opening. Control. The control device 16 includes a main switch 4
When the accelerator opening is smaller than the predetermined opening at the time of the ON operation of 9, the energization to the DC motor 32 is permitted, but when the accelerator opening is equal to or more than the predetermined opening, the energization to the DC motor 32 is prohibited and a warning is issued. The light 62 is turned on, and thereafter, the warning light 62 is turned off under the condition that the accelerator opening is smaller than a predetermined opening by a driver's operation of returning the accelerator grip or the like,
The energization of the DC motor 32 is allowed.

FIG. 8 is a diagram showing a fifth embodiment of the control device. The control device 16 shown in FIG.
A charging outlet 63 is provided on the movable member 64 so that it can be stored by the operation of the movable member 64 (rotation indicated by an arrow in the figure), and a changeover switch 65 that switches by rotating the movable member 64 is provided. is there. Selector switch 65
Are a pair of terminals a1, a2 interposed between the battery 30 and the start switch 53, a pair of terminals b1, b2 interposed between the battery 30 and the ground end, and the movable member 64.
The outlet 63 is connected to the terminals b1 and b2 at the charging position shown in the drawing where the mover C is fixed to the
To connect and disconnect the terminals a1 and a2,
In the traveling position where is stored, the terminals a1 and a2 are electrically connected by the mover C to connect the battery 30 and the start switch 53. The start switch 53 is completely connected to the solenoid 66a of the relay 66. When the normally open contactor 66b is interposed between the battery 30 and the DC motor 32 and the start switch 53 is opened,
The solenoid 66a is energized and the contactor 66b closes.

The control device 16 charges the battery 30 by connecting the outlet 63 to a commercial power supply for home use at the charging position where the outlet 63 is protruded. In this charging position, the battery 30 and the start switch 63 are connected. Is separated by the changeover switch 65, so that the vehicle does not start even if the accelerator grip is erroneously operated. In the storage position where the outlet 63 is stored,
The changeover switch 65 conducts between the terminals a1 and a2, and can perform normal traveling.

FIG. 9 is a diagram showing a sixth embodiment of the control device. The control panel 16 shown in FIG.
And the indicator light 67 are connected to the normally open contactor 68b of the relay 68.
The main switch 49 is connected to the battery 30 through a pair of switches 49a and 49b. One of the switches 49a and 49b is connected in series with the brake switch 69, the start switch 53, and the solenoid 68 of the relay 68. And the other switch 49b is connected to the drive circuit 45 side terminal of the contactor 68b of the relay 68 and the start switch 53 of the solenoid 68a.
It is provided in series with a relay holding circuit connecting the side terminals. The above-described brake switch 69 is closed when the brake pedal is depressed, and the indicator light 67 is lit to indicate that the vehicle can travel.

At the time of start, the control device 16 closes the contactor 68b of the relay 68 on condition that the brake switch 69 is closed, that is, the brake pedal is depressed, and the drive circuit 45 To maintain the closed state of the contactor 68b of the relay 68 until the main switch 49 is closed. Therefore, it is possible to start only at the time of the brake operation.

FIGS. 10 to 14 show a two-wheeled electric motorcycle with an electric motor according to another embodiment of the present invention.
The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 10 is an exploded perspective view of a main part, and FIG.
1 is an exploded perspective view of another main part, FIG. 12 is a perspective view of one main part, FIG. 13 is a perspective view of the main part in a different state, FIG.
4 (a), (b), (c), and (d) are operation explanatory diagrams.

This motorcycle with an electric motor has a pair of tubes 70L, 70R in which the body frame 11 extends parallel to the front and rear while being separated to the left and right.
70R has projecting members 72L,
72R are provided in front and rear of the tube 70L, 7
A battery tray 71 on which the battery 30 is mounted on the OR is detachably mounted between the projecting members 72L and 72R.
The protruding members 72L and 72R are shown in FIGS. 14 (a), (b),
As shown in (c) and (d), when the vehicle body is tilted, it comes into contact with the road surface and is maintained in the tilted state. In addition, 73 is a cross tube.

The battery tray 71 has a substantially box shape with an open upper side, and the battery 30 is fixed inside. A hook portion 71a curved outward and downward on one of the right and left upper edges has an upper side on the other right and left sides. A flat plate-shaped fastening portion 71b extending to the side is integrally formed. In this battery tray 71, a hook portion 71a is locked to one tube 70R, and a fastening portion 71b
Are fixed to the tube 70L by bolts 74 that pass through the fastening portion 71b and are screwed to the other tube 70L. As shown in FIG. 12, a handle 71c is fixed to the front of the battery tray 71.

As shown in FIG. 11, the battery 30
Terminal cords 75a and 75b are connected to terminals t1 and t2 via terminal guides 76 by bolts 77. The terminal guide 76 is made of a flat insulating material, and has cylindrical members 78a and 78 having substantially semicircular cross sections at both rear corners.
b is fixedly fitted to the tubes 70L and 70R. The terminal guide 76 includes a cylindrical member 78a,
78b is fitted to the tubes 70L and 70R, and is fixed to the battery 30 together with the terminal cords 75a and 75b by bolts 77.

As shown in FIGS. 12 and 13, the battery tray 71 is provided with a stand 26 at the bottom so as to be detachable. The erecting stand 26 is attached to the mounting plate 7.
9, a pair of legs 80L, 80R are swingably supported, and these legs 80L, 80R are urged in one direction by a spring 81, and rollers 82L, 82R rotate below the legs 80L, 80R, respectively. It is provided freely. These rollers 82L and 82R are located above the lower ends of the legs 80L and 80R and separated from the road surface with the legs 80L and 80R standing up (see FIG. 12), but have a larger diameter than the legs 80L and 80R and have a larger diameter. , 80R lying down on the legs 80
L, 80R project to the side. This standing stand 26
Are attached to the battery tray 71 and the legs 80L, 8
A cart for transporting the battery 30 is configured together with the battery tray 71 that causes the 0R to fall down (see FIG. 13), and the battery 30 is transported by gripping and pulling the handle 71c with the rollers 82L and 82R grounded to the road surface. Can be done with

In the two-wheeled vehicle with an electric motor according to this embodiment, a heavy motor (electric motor unit) is disposed near the center at a low center of gravity below the seat of the two-wheeled vehicle in the same manner as described above. Therefore, handling becomes good.
The heavier battery 30 is arranged along the lower straight portion of the lower front frame 11F, so that the battery can be mounted without prominently projecting its appearance, and the battery is located closer to the motor. With contacts, the wiring is short. The heavy battery 30 is disposed such that its center of gravity is located below the floor panel 23 below the line H connecting the axles Af and Ar of the front and rear wheels 14F and 14R. As a result, the battery 30 can be easily attached and detached.

The two-wheeled vehicle also includes projecting members 72L, 70L projecting laterally from tubes 70L, 70R of the body frame 11.
72R is provided, and the battery tray 71 is attached by being bridged between the tubes 70L and 70R.
As shown in FIGS. 14 (a), (b), (c) and (d),
The attachment / detachment of the battery 30 can be performed by inclining the two-wheeled vehicle, and can be easily performed. That is, the mounting of the battery 30 is performed by inclining the upright motorcycle <FIG. 14 (a)> until the protruding member 72R comes into contact with the road surface to lock the hook portion 71a of the battery tray 71 with the tube 70R <FIG. 14 (b). )>, And then the motorcycle is tilted in the opposite direction to fasten the bolt 74 (FIG. 14 (c)). Removal of the battery 30 can be performed in the reverse order.

Accordingly, the battery 30 can be detached without being lifted. Then, after this, the terminal code 75
a and 75b are connected to the terminals t1 and t2 of the battery 30, but the battery 30 is fixed to the battery tray 71, and the battery tray 71 is attached to the vehicle body by engaging the hook portion 71a with the tube 70R. It can be accurately positioned at a predetermined position, and the terminal codes 75a, 75b and the like can be shortened. Further, the battery tray 71 is provided with the
Since the battery 30 can be used as a cart for transportation, transportation of the battery 30 is also easy.

[0038]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect of the present invention, an electric vehicle body frame includes a pipe frame extending rearward and downward from a head pipe supporting a front wheel and bending downward, and a frame extending upward from a rear portion of the pipe frame and supporting a seat. In a motorcycle with a motor, an electric motor unit is mounted below the seat at the rear of the pipe frame, and a battery is installed along the body frame on a straight portion of the body frame,
The battery contacts are provided on the electric motor unit side.

According to the first aspect, since the pipe frame extends rearward and downward from the head pipe and bends downward, the entire frame has a low center of gravity, and the occupant can cross over easily.
In addition, the electric motor, which is a heavy object, is disposed at the low center of gravity at a low position below the seat of the two-wheeled vehicle and near the center, so that the two-wheeled vehicle with the electric motor can be easily handled. Furthermore, by arranging the battery along the body frame in the straight portion of the body frame, the battery is arranged along the body frame, and the battery does not protrude greatly from the body frame. In harmony, the vehicle body frame can be mounted without greatly different appearance, and since the contacts are provided on the side close to the electric motor, the wiring between the battery and the electric motor can be shortened.

[Brief description of the drawings]

FIG. 1 is a side view of an electric motorcycle.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional plan view of a power system.

FIG. 4 is a diagram showing a first embodiment of a control device.

FIG. 5 is a diagram showing a second embodiment of the control device;

FIG. 6 is a diagram showing a third embodiment of the control device;

FIG. 7 is a diagram showing a fourth embodiment of the control device;

FIG. 8 is a diagram showing a fifth embodiment of the control device;

FIG. 9 is a diagram showing a control device according to a sixth embodiment;

FIG. 10 is an exploded perspective view of a main part,

FIG. 11 is an exploded perspective view of another main part.

FIG. 12 is a perspective view of one main part.

FIG. 13 is a perspective view of the main part in a different state.

FIGS. 14 (a), (b), (c), and (d) are action explanatory diagrams.

FIG. 15 is a map showing control characteristics of a DC motor.

[Explanation of symbols]

11: body frame, 11F: front frame of pipe frame, 11b: linear portion, 11R: rear frame (seat support frame), 12: head pipe, 1
4F: Front wheel, 14R: Rear wheel, 18: Seat, 20
... Electric motor unit, 30 (30L, 30R) ... Battery.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Suzuki 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Kenji Tamaki 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd. (72) Inventor Yoshihiro Nakazawa 1-4-1 Chuo, Wako-shi, Saitama Pref.

Claims (1)

[Claims] 1. An electric vehicle comprising a body frame comprising a pipe frame extending rearward and downward from a head pipe supporting front wheels and bending downward, and a frame extending above a rear portion of the pipe frame and supporting a seat. In a motorcycle with a motor, an electric motor unit is mounted below a seat behind the pipe frame, and a battery is installed along a vehicle body frame on a straight portion of the vehicle body frame, and a contact point of the battery is provided on the electric motor unit side. A two-wheeled vehicle with an electric motor.