JPH05105144A - Motorcycle driven by electric motor - Google Patents

Abstract

PURPOSE:To mount a large number of batteries, suppressing the increase of the length of a wheel base and the height of the foot placing position. CONSTITUTION:A power unit 10 equipped with an electric motor is installed below a seat on a frame 1 which is bent downward between a head pipe 5 and a seat 7. A plurality of batteries 8 are installed at the bendable part of the frame 1. The battery 8 positioned on the rear side of a car body is positioned over the power unit 10. Since the battery 8 and the power unit 10 are superposed, viewed from over the car body, the mounting length can be shortened by the superposed part. The battery mounting space is made slender in the longitudinal direction, and each foot placing part is formed on both the sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motorcycle which uses an electric motor as a drive source for traveling.

[0002]

2. Description of the Related Art Recently, as a motorcycle, one having a structure in which a rear wheel is driven by an electric motor has been attracting attention. In this type of electric motorcycle, an electric motor is attached instead of the engine, and a plurality of batteries for supplying electric power to the electric motor are mounted on the vehicle body.

[0003]

However, in the conventional electric two-wheeled vehicle, in addition to the heavy electric motor, a plurality of relatively heavy batteries must be mounted to enable long-time running. The location of the battery was a problem.

That is, for example, in a scooter type motorcycle, if the battery is placed at the footrest position between the front and rear wheels for the purpose of a low center of gravity, the wheelbase becomes longer or the footrest position becomes higher depending on the arrangement.

[0005]

In an electric motorcycle according to the present invention, a power unit including an electric motor, a rear wheel drive power transmission device extending rearward from the electric motor, and a rear wheel is mounted on the frame below the seat. A plurality of batteries, which are pivotally supported so as to be swingable up and down and which feed the electric motor, are mounted by being bent along the left and right pipes of the frame so as to face the left and right pipes. The battery located at is located above the electric motor of the power unit.

[0006]

[Function] Since the battery located on the rear side of the vehicle body and the front portion of the power unit overlap when viewed from above the vehicle body, the length of the vehicle body in the front-rear direction required to mount them on the vehicle body is shortened by the dimension of the overlapped portion. Become. In addition, the battery mounting space becomes elongated in the front and rear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a side view of an electric motorcycle according to the present invention, in which the vehicle body cover is removed. 2 is a plan view of an electric motorcycle according to the present invention, FIG. 3 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV of a vehicle body portion in FIG. 1, and FIG. 5 is a power unit in FIG. 6 is a sectional view taken along line VV of FIG. 6, and FIG. 6 is a perspective view showing a battery box used in the electric motorcycle according to the present invention.

In these drawings, reference numeral 1 denotes a frame, which is a head pipe 5 for supporting a front fork 4 having a front wheel 2 and a handle 3 in a steerable manner.
Left and right 2 extended rearward from this head pipe 5
It is composed of a book main pipe 6 and the like.

The main pipe 6 is formed by bending a pipe having a circular cross section, and the left and right pipes are provided at the same height position so as to overlap each other when viewed from the lateral direction of the vehicle.

The main pipe 6 is bent downward between the head pipe 5 and the seat 7, and the main pipe 6 extends forward from the head pipe 5 while being inclined rearward, and the front and rear direction of the vehicle body. It is composed of a horizontal portion located in the central portion and a rear portion that extends downward and rearward below the seat 7 and extends toward the rear portion of the vehicle body. The left and right main pipes 6 are connected at the horizontal portion by two cross pipes 6a and 6b. The seat 7 is supported and fixed to the main pipe 6 via a gate-shaped rear frame 6c that is bridged between the left and right main pipes 6 at the rear portion of the vehicle body.

A battery box 9 for accommodating a battery 8 is mounted on the horizontal portion of the main pipe 6 so as to face between the left and right main pipes 6, and a bent portion on the rear side of the horizontal portion will be described later. A power unit 10 with a built-in electric motor as a unit swing type prime mover is a spindle 1
It is swingably supported via 1. The support shaft 11
Are arranged with their axial direction oriented in the vehicle width direction.

A controller 12 for controlling the power unit is mounted on the front part of the main pipe 6, and a charger 1 for charging the battery 8 is mounted on the rear part of the main pipe 6.
3 is installed. These members are also mounted so as to face each other between the left and right main pipes 6.

As shown in FIG. 6, the battery box 9 is integrally formed of a synthetic resin in a box-like shape having an upward opening. Inside the box-like box body 9a, four battery boxes are provided. Three partition plates 9b are provided to accommodate the battery 8 of FIG. The partition plate 9b is formed with a notch 9c through which a battery cable (not shown) for connecting the front and rear batteries 8 is passed.

The battery box 9 is shown in FIG.
As shown in FIG. 3, a support plate 9d that is supported by a steel plate stay 6d that is provided so as to extend between the left and right main pipes 6 and that is projected from the front and rear side plates is attached to the support bracket 1a of the frame 1.
It is fixed to the frame 1 by bolting to 1b. In addition, the support brackets 1a and 1b
Are attached to the cross pipes 6a and 6b of the frame 1, respectively.

Reference numeral 9e is a battery band for fixing the battery 8 to the battery box 9. The battery band 9e is bolted to a bracket 9f projecting from the opening of the battery box 9 so that the battery 8 is placed above. It is configured to be pressed from. And, above the battery band 9e, the body cover 1
It is covered with a battery cover 16 which constitutes a part of the battery 5.

The member denoted by the reference numeral 17 located above the battery band 9e and below the battery cover 16 in FIG. 3 is a rear brake wire or
Main harness etc.

The vehicle body cover 15 includes a left-right integrated upper cover 15a located above the main pipe 6 and an under cover 15b located below the main pipe 6.
It has and. An opening for battery maintenance is formed at a position above the battery box 9 in the upper cover 15a, and the battery cover 16 is detachably attached so as to close the opening.

The power unit 10 includes a rear wheel 1 at the rear end.
It has a unit swing structure that rotatably supports 8 in a cantilever manner, and includes a shaft drive device as a power transmission device for driving rear wheels. A rubber bush (not shown) is interposed between the power unit 10 and the support shaft 11. That is, the power unit 10 swings up and down about the support shaft 11 while twisting the rubber bush. Also, the rear part of the power unit 10 and the frame 1
A rear cushion unit 19 is interposed between the main pipe 6 on the left side of the vehicle body.

As shown in FIG. 5, the power unit 10 includes an electric motor 20 located substantially in the center of the vehicle width direction, and an electric motor 2.
0 is provided with a propeller shaft 22 which is connected via a spur gear type speed reduction mechanism 21 and a rear wheel shaft 24 which is connected to a rear end portion of the propeller shaft 22 via a bevel gear type speed reduction mechanism 23. The front portion (electric motor 20 portion) of the power unit 10 faces a position below the battery box 9.

The electric motor 20 is of a so-called vertical type in which a rotating shaft having a rotor made of a magnet is oriented in the longitudinal direction of the vehicle body. A coil, which is a stator of the electric motor 20, is connected to the battery 8 via a controller 12 fixed to the front part of the main pipe 6. In addition,
The controller 12 determines the amount of current supplied from the battery 8 to the electric motor 20 by controlling the throttle grip 3 of the handle 3.
It is configured to control according to the operation amount at a.

In the power unit 10, when the throttle grip 3a is operated to rotate the rotating shaft of the electric motor 20, the rotating force is transmitted to the rear wheel shaft 24 via the propeller shaft 22 to drive the rear wheel 18. Will be.

The charger 13 is constructed so as to charge the battery 8 by changing the AC 100V power source to a DC 12V, and as shown in FIG. 4, a support plate 6d provided on the left and right main pipes 6 is provided. Placed and fixed.

A charging socket (not shown) connected to the charging cord 25 is provided at the charging port 13a as an input portion of the charger 13. Charging cord 2
As 5, there is used one having a plug connected to the charging socket at one end and a plug connected to a household outlet or the like at the other end.

The charging port 13 in the vehicle body cover 15
A charging lid 15c for passing the charging cord 25 through is provided at a portion corresponding to a. The upper portion of the charging lid 15c is pivotally supported by the upper cover 15a, and is openable / closable as shown in FIG. Then, it is constantly biased in the closing direction by a return spring (not shown).

1 and 2, reference numeral 26 is a luggage basket mounted on the front portion of the vehicle body, and 27 is a footrest. The luggage basket 26 is supported on the front portion of the main pipe 6 via a gate-shaped support bracket 26a that is hung between the left and right main pipes 6, and is a space between the head pipe 5 and the seat 7. It is located in.

In the electric motorcycle constructed as described above, the charging operation of the battery 8 is performed by opening the charging lid 15c, inserting the charging cord 25 into the body cover 15, and connecting it to the charging socket of the charger 13. .. Further, the battery 8 is attached and detached by opening the battery cover 16 to expose the battery box 9 and removing the battery band 9e.

Therefore, in this electric two-wheeled vehicle, the battery 8 located on the rear side of the vehicle body and the front portion of the power unit 10 overlap when viewed from above the vehicle body. Is shortened by the size of the overlapping part. For this reason, the battery mounting amount can be increased as much as possible without expanding the distance between the head pipe 5 and the seat 7, in other words, without lengthening the wheel base. In addition, the battery mounting space becomes elongated in the front and rear.

[0028]

As described above, in the electric motorcycle according to the present invention, the power unit including the electric motor, the rear wheel drive power transmission device extending rearward from the electric motor, and the rear wheel is provided under the seat with the frame. A plurality of batteries are mounted so as to be pivotally supported on the vehicle so as to be swingable up and down and to feed the electric motor along the left and right pipes at the bent portion of the frame and facing the left and right pipes. Since the battery located on the side is located above the electric motor of the power unit, the battery located on the rear side of the vehicle body and the front part of the power unit overlap when viewed from above the vehicle body. The length in the front-rear direction is reduced by the size of the overlapping portion.

Therefore, according to the present invention, it is possible to obtain the electric two-wheeled vehicle in which the battery can be mounted as much as possible while suppressing the lengthening of the wheel base.

Further, since the battery mounting space is elongated in the front-rear direction, it is possible to secure footrest positions on both sides of the battery mounting portion.

Further, by positioning the battery above the electric motor, the lowest position of the vehicle body is
The electric motor near the rear wheel will be positioned. In other words, the vehicle height of the portion immediately after the front wheel becomes relatively high. Therefore, when the front wheels pass over a projection on the road surface, even if the vehicle body approaches the projection while the buffer spring is contracted, the vehicle body is hard to touch the projection.

[Brief description of drawings]

FIG. 1 is a side view of an electric motorcycle according to the present invention.

FIG. 2 is a plan view of the electric motorcycle according to the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV of the vehicle body portion in FIG.

5 is a cross-sectional view taken along the line VV of the power unit in FIG.

FIG. 6 is a perspective view showing a battery box used in the electric motorcycle according to the present invention.

[Explanation of symbols]

 1 frame 5 head pipe 7 seat 8 battery 9 battery box 10 power unit

Claims (1)

[Claims] 1. A motorcycle having a frame composed of a pair of left and right pipes bent downward between a head pipe and a seat, wherein an electric motor, a rear wheel drive power transmission device extending rearward from the electric motor, and a rear A power unit having a wheel is pivotally supported on the frame below the seat and is swingably mounted up and down, and a battery for supplying power to the electric motor is provided along the left and right pipes at the bent portion of the frame and the left and right pipes. An electric motorcycle, wherein a plurality of batteries are mounted facing each other, and a battery located on the rear side of the vehicle body is positioned above the electric motor of the power unit.