JPH05105160A - Motorcycle driven by electric motor - Google Patents

Abstract

PURPOSE:To centralize mass and efficiently cool an electric motor and a controller. CONSTITUTION:A frame 1 in T form on side view is formed from a lower part frame 7 and a main pipe extending nearly horizontally to the rear part of a vehicle body from a head pipe 4. A power unit 10 is installed at the lower edge part of the lower part frame 7, and a controller 27 is installed on the power unit 10. A plurality of batteries are installed along the main pipe 6. An electric motor, controller 27, and the battery 8 are positioned at the position at the near center in the longitudinal direction of the vehicle body, and the vehicle weight is distributed nearly uniformly on the front and rear wheels 2 and 19. A space into which the traveling wind is led is formed in front of the electric motor and the controller 27.

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, a plurality of relatively heavy batteries must be mounted in order to enable long-term running, and in addition, the electric motor and the controller are heavy. Since it is an object and generates heat, the mounting positions of the electric motor, the controller and the battery have been a problem.

That is, depending on the arrangement positions of the electric motor, the controller and the battery, the weight distribution between the front and rear wheels is likely to be biased, and if the electric motor and the controller are not sufficiently cooled, the function is deteriorated.

[0005]

An electric motorcycle according to the present invention includes a front frame portion extending rearward from a head pipe for supporting a front fork in a steerable manner, and a front frame portion extending downward from the frame portion to support a seat. A substantially T-shaped frame in a side view is formed by the lower frame portion, a rear wheel drive electric motor is attached to the lower end portion of the lower frame portion, and an electric motor controller is attached to the upper side of the electric motor along the lower frame portion. A plurality of batteries for supplying power to the electric motor are mounted along the front frame portion.

[0006]

A heavy electric motor, a controller and a battery are positioned at a position substantially centrally between the head pipe and the seat in the front-rear direction of the vehicle, and the weight of the vehicle is evenly distributed to the front wheels and the rear wheels. In addition, a space is provided in front of the electric motor and the controller to guide the traveling wind.

[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, which shows a state in which a left 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, and FIG. 4 is IV- in FIG.
FIG. 5 is a sectional view taken along line IV, FIG. 5 is a sectional view taken along line VV of the power unit in FIG. 1, and FIG. 6 is a perspective view of a battery box used in the electric motorcycle according to the present invention. In these figures,
Reference numeral 1 denotes a frame. The frame 1 includes a head pipe 4 for rotatably supporting a front fork 3 provided with a front wheel 2 and a head pipe 4 which extends substantially horizontally from the head pipe 4 toward the rear of the vehicle body and has a rear end portion. A single main pipe 6 that supports the seat 5 and a lower frame 7 that extends downward from the main pipe 6 are formed in a T-shape in a side view.

The main pipe 6 and the lower frame 7
Is formed by a rectangular pipe having a rectangular cross section. A battery box 9 for accommodating the battery 8 is attached to a horizontal portion of the main pipe 6 between the head pipe 4 and the seat 5, and a lower end of the lower frame 7 serves as a unit swing type prime mover described later. The power unit 10 is swingably supported via a support shaft 11. In addition, the support shaft 11 is arranged with its axial direction oriented in the vehicle width direction.

A rear portion of the seat 5 is pivotally supported by the main pipe 6, and as shown by a chain double-dashed line in FIG. 1, the front portion of the seat is lifted upward to erect the seat 5, thereby lowering the seat. It is configured so that the storage space of can be opened. As shown in FIG. 3, the storage space is formed by surrounding the seat lower space with left and right split type vehicle body covers 12 and 13 attached to the left and right of the frame 1 and a battery box 9 attached to the main pipe 6. Has been done.

In the storage space, a code box 14 is stored on the left side of the vehicle body with respect to the main pipe 6, and a charger 15 for charging the battery 8 is stored on the opposite side. The charger 15 uses a 100V AC power supply and a 12V DC power supply.
Instead of this, the battery 8 is configured to be charged, and its input side is connected to the charging cord 16 housed in the cord box 14. The code box 14 and the charger 15 are supported and fixed to the main pipe 6, respectively.

The charging cord 16 has a plug 16a to be plugged into a household power outlet (not shown), and is stored in the cord box 14 in a wound state by a cord reel mechanism (not shown).

The battery box 9 is integrally formed of synthetic resin, and as shown in FIG. 6, a pair of left and right battery accommodating portions 9a, which are formed in a box shape and open upward, are connected via a plate-like connecting portion 9b. The structure is linked. In addition, partition plates 9c are provided inside the left and right battery storage portions 9a.
It is divided into two rooms by the front and back. The partition plate 9c
A notch 9d for passing a battery cable (not shown) that connects the front and rear batteries 8 is formed in the.

As shown in FIG. 4, the battery box 9 is supported by the main pipe 6 such that the main pipe 6 is faced from below between the left and right battery accommodating portions 9a, and the plate-like connecting portion is provided. It is fixed to the main pipe 6 by a mounting bolt 9d penetrating 9b.
That is, when this battery box 9 is used, two batteries 8 can be mounted on one side of the main pipe 6 in the front-rear direction, and four batteries can be mounted in the left-right direction.

A battery cover 17 for covering the upper portion of the battery 8 by closing the opening between the left and right vehicle body covers 12, 13 is provided at a position above the battery box 9. This battery cover 1
7 is bridged over the left and right body covers 12, 13 and is detachably fixed to them.

The member indicated by the reference numeral 18 below the main pipe 6 and between the left and right battery storage portions 9a in FIG. 4 is a rear brake wire, a main harness or the like.

The power unit 10 includes a rear wheel 1 at the rear end.
It has a unit swing structure that rotatably and cantilever-supports 9, and includes a shaft drive device as a rear-wheel drive power transmission device. A rubber bush 20 is provided between the power unit 10 and the support shaft 11 as shown in FIG.
Is installed. That is, the power unit 10 swings up and down about the support shaft 11 while twisting the rubber bush 20. A rear cushion unit 21 is provided on the left side of the vehicle body between the rear portion of the power unit 10 and the frame 1.

As shown in FIG. 5, the power unit 10 includes an electric motor 22 located substantially in the center of the vehicle width direction, and an electric motor 2.
2 is provided with a propeller shaft 24 connected via a spur gear type speed reducing mechanism 23, a rear wheel shaft 26 connected to a rear end portion of the propeller shaft 24 via a bevel gear type speed reducing mechanism 25, and the like. Further, the electric motor 22 is of a so-called vertical type in which a rotating shaft supporting a rotor made of a magnet is oriented in the longitudinal direction of the vehicle body.

The coil, which is the stator of the electric motor 22, is connected to the battery 8 via a controller 27 fixed to the front part of the lower frame 7. The controller 27 determines the amount of current supplied from the battery 8 to the electric motor 22 by adjusting the throttle grip 27a of the steering wheel.
It is configured to control in accordance with the operation amount at.

In the power unit 10, when the throttle grip is operated to rotate the rotating shaft of the electric motor 22, the rotating force is transmitted to the rear wheel shaft 26 via the propeller shaft 24 to drive the rear wheel 19. It will be.

1 and 2, 28 is a footrest fixed to the lower frame 7, and 29 is the vehicle body cover 1.
It is a louver formed in Nos. 2 and 13. This louver 2
9 is formed at a position in front of the controller 27, and the traveling wind shown by an arrow A in FIG.
Is configured to lead to. Louver 29
By forming the above, the controller 27 that generates heat during traveling can be efficiently cooled by traveling wind.

In the electric motorcycle constructed as described above, when charging the battery 8, the seat 5 is erected and the charging cord 16 is pulled out from the cord box 14, and the plug 16a of the charging cord 16 is used as a household outlet. Connect and do.

The battery 8 is attached and detached by removing the battery cover 17 and exposing the battery 8 and the battery box 9.

Therefore, in this electric motorcycle, the electric motor 22, which is a heavy load, the controller 27, and the battery 8 are positioned at a position between the head pipe 4 and the seat 5 at a substantially central portion in the vehicle front-rear direction. The vehicle weight is substantially evenly distributed to the two and the rear wheels 19. Furthermore, the electric motor 2
In front of the controller 2 and the controller 2, there is provided a space in which traveling wind is guided.

Further, as shown in this embodiment, when the battery box 9 having a structure for distributing the right and left is attached to the main pipe 6 made of a square pipe, the battery box 9 is prevented from swinging to the left or right during cornering or the like. Since it is not necessary to specially provide a pressing member, a battery box mounting bracket, or the like, the cost can be reduced.

Further, since the battery 8 is exposed and the battery 8 can be attached and detached only by removing the battery cover 17, the maintainability can be improved.

In the above embodiment, the power unit 10 is of the unit swing type. However, as shown in FIG. 7, the electric motor may be fixed to the frame.

FIG. 7 is a view showing another embodiment in which the electric motor is fixed to the frame. In FIG. 7, reference numeral 31 is a frame for an electric motorcycle. The frame 31 is configured by connecting a frame body 33 to a head pipe 32. Note that FIG. 7 shows a view of the frame 31 from the front.

The frame body 33 is formed by casting, and an electric motor case 34 that opens to the side of the vehicle body is integrally provided at the lower end of the frame body 33. Reference numeral 35 denotes an electric motor. The electric motor 35 includes a stator 36 as a stator mounted in the electric motor case 34, an electric motor shaft 37 that supports the stator and is positioned in the stator 36, and the electric motor case 34. And a cover 38 that closes the opening of the.

The electric motor shaft 37 is rotatably supported at the right end of the vehicle body by a bearing 39 mounted in the electric motor case 34, and is fitted and supported by a cover 38.
The left end of the vehicle body is rotatably supported by 0.
Further, a sprout (not shown) is attached to the shaft end on the left side of the vehicle body of the electric motor shaft 37,
The rotation of 7 is transmitted to the rear wheels by a chain (not shown). Even with this structure, the same effect as that of the above embodiment can be obtained.

[0030]

As described above, in the electric motorcycle according to the present invention, the front frame portion that extends rearward of the vehicle body from the head pipe that rotatably supports the front fork and the seat that extends downward from the frame portion is supported. And a lower frame part that forms a substantially T-shaped frame in a side view, a rear-wheel drive electric motor is attached to the lower end part of the lower frame part, and an electric motor controller is provided above the electric motor along the lower frame part. Since a plurality of batteries for mounting and supplying power to the electric motor are mounted along the front frame portion, the electric motor, controller and battery, which are heavy objects, are positioned between the head pipe and the seat in a substantially central portion in the vehicle longitudinal direction. , The weight of the vehicle body is substantially evenly distributed to the front wheels and the rear wheels. In addition, a space is provided in front of the electric motor and the controller to guide the traveling wind.

Therefore, the vehicle weight is distributed substantially evenly to the front wheels and the rear wheels so that the mass can be concentrated and the electric motor and the controller can be sufficiently cooled. Further, according to the present invention, since the electric motor, the controller and the battery are arranged along the frame, there is an effect that it is possible to reduce the size and weight of the support structure for these heavy objects.

[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.

4 is a sectional view taken along line IV-IV 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 of a battery box used in the electric motorcycle according to the present invention.

FIG. 7 is a diagram showing another embodiment in which an electric motor is fixed to a frame.

[Explanation of symbols]

 1 frame 3 front fork 4 head pipe 5 seat 6 main pipe 7 lower frame 8 battery 9 battery box 10 power unit 22 electric motor 27 controller 31 frame 35 electric motor

Claims (1)

[Claims] 1. A front frame portion extending rearward of a vehicle body from a head pipe for supporting a front fork in a steerable manner,
A substantially T-shaped frame in a side view is formed by the lower frame portion that extends downward from the frame portion and supports the seat, and a rear wheel drive electric motor is attached to the lower end portion of the lower frame portion, and the upper side of the electric motor is also attached. An electric motorcycle, wherein a controller for an electric motor is attached to the lower frame portion, and a plurality of batteries for supplying electric power to the electric motor are attached to the front frame portion.