JP3172952B2 - Electric motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric two-wheeled vehicle that runs using an electric motor as a drive source.

[0002]

2. Description of the Related Art In recent years, motorcycles having a structure in which a rear wheel is driven by an electric motor have attracted attention. In this type of electric motorcycle, an electric motor is mounted instead of the engine, and a plurality of batteries for supplying power to the electric motor are mounted on the vehicle body.

[0003]

However, in a conventional electric motorcycle, a plurality of relatively heavy batteries must be mounted in addition to a heavy electric motor in order to enable long-time running. The mounting position of the battery was a problem.

[0004] That is, when the battery is arranged on the front side or the rear side of the electric motor, the weight distribution between the front and rear wheels tends to be biased. In addition, since the mounting amount of the battery is large, a mounting space for those members is required to be wide, and depending on the arrangement of the battery, the wheel base becomes long or the seat height becomes high.

[0005] On the other hand, there has been a demand for mounting a large amount of stored items on a motorcycle.

[0006]

An electric motorcycle according to the present invention has an upper frame extending rearward substantially horizontally from a head pipe, and a lower frame bent downward between the head pipe and a seat. A front portion extending downward from the head pipe to the frame, a bottom portion extending substantially horizontally rearward from the lower end of the front portion, and a rear portion extending upward from the rear end of the bottom portion and connected to the upper frame; A motor for driving a rear wheel via a power transmission member is fixed on the bottom portion, and a plurality of power sources are provided below the upper frame and close to the upper side of the motor to supply power to the motor. And a battery storage box having an opening formed on a side surface thereof so that these batteries can be attached and detached from the side of the vehicle body. A luggage storage box having an opening formed on an upper surface so that luggage can be taken in and out from above, is disposed in proximity to an upper side of the battery storage box. And the luggage storage box is formed so as to extend over substantially the entire space formed between the head pipe and the front end of the seat. An electric motor, a battery storage box, and a luggage storage box are arranged vertically.

[0007]

Since the electric motor, the battery and the luggage storage box are positioned vertically between the front and rear wheels, the mounting space for these members does not increase in the longitudinal direction of the vehicle body. The weight is distributed approximately evenly. In addition, the luggage storage box is located in a relatively large space above the upper frame and between the head pipe and the seat. Further, the electric motor and the battery storage box are disposed by effectively utilizing the space formed inside the lower frame, so that attachment / detachment of the battery and loading / unloading of the luggage can be performed independently.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view of an electric motorcycle according to the present invention, FIG. 2 is a plan view of the same, and FIG.
FIG. 4 is a cross-sectional view taken along a line IV-IV in FIG. 1,
FIG. 5 is a perspective view showing a battery box used for the electric motorcycle according to the present invention.

In these figures, reference numeral 1 denotes a motorcycle frame, and the frame 1 includes a front wheel 2 and a steering wheel 3.
A head pipe 5 that supports a front fork 4 having a steering wheel so as to be steerable, a main frame 6 (an upper frame according to the present invention) made of a single tube material extending substantially horizontally rearward from the head pipe 5; Down tube 7 made of one pipe material extending downward from head pipe 5
And two left and right seat pillar tubes 8 and the like, which are bent downward in a J-shape in a side view and connect the lower end of the down tube 7 and the rear portion of the main frame 6. The lower frame according to the present invention is constituted by the down tube 7 and the seat pillar tube 8. The lower frame includes a front portion extending downward and downward in the down tube 7 and the seat pillar tube 8, a bottom portion extending substantially horizontally rearward from a lower end of the front portion in the seat pillar tube 8, and a bottom portion extending in the seat pillar tube 8. A rear portion extending upward from the rear end of the portion forms a substantially U-shape in side view.

A helmet box 9 described later and a seat 10 are supported and fixed to the main frame 6.

The seat pillar tube 8 has a rear wheel 1 attached thereto.
The rear arm 12 rotatably supports the pivot shaft 1
3 for swinging support. One rear cushion unit 14 is interposed between the rear arm 12 and the main pipe 6 at the center in the vehicle width direction.

As shown in FIG. 3, the helmet box 9 is formed in a box shape that opens upward, and stores a helmet box main body 9a that stores a helmet 15, and a helmet that is pivotally supported by the helmet box main body 9a. And a lid 9b in the form of a box lid for closing an opening on the upper surface of the box body 9a. The lid 9b is disposed close to the upper side of a battery box 23 described later. That is, the helmet box 9 is formed so that the helmet 15 can be put in and out from above. The helmet box 9 is formed so as to extend over substantially the entire space formed between the head pipe 5 and the seat front end in a side view.

The rear portion of the lid 9b is pivotally supported by the helmet box main body 9a, and the helmet box main body 9a is opened by raising the front portion as shown by a two-dot chain line in FIG. .

The left and right sides of the helmet box main body 9a are covered with a top cover 16. The lid 9 is attached to the top cover 16 on the left side of the vehicle body.
A lock mechanism 9c for locking in a state where b is closed is attached.

The upper edge of the top cover 16 is shown in FIG.
As shown in FIG. 7, the helmet is formed so as to face the inside of the lid 9b in the closed state, so that rainwater or the like does not easily enter the helmet storage portion.

The seat 10 is fixed via a support stay 10a extending upward from the rear end of the main frame 6.

Reference numeral 17 denotes an electric motor for driving the rear wheel 11, and this electric motor 17 is a portion which is the lowest position of the seat pillar tube 8 with the rotating shaft supporting the rotor directed in the vehicle width direction. That is, it is mounted on the bottom side of the lower frame (the part extending substantially horizontally in the seat pillar tube 8). The coil, which is the stator of the electric motor 17, is connected to a battery described later via a controller described later. As shown in FIG. 3, the mounting structure of the electric motor 17 is such that brackets 8a are provided on the left and right seat pillar tubes 8, respectively, and the base 17a of the electric motor 17 is bolted to the brackets 8a.

A sprocket 18 constituting a part of a power transmission member along the rear arm 12 is mounted on the rotating shaft of the electric motor 17. This sprocket 18
Is connected to a sprocket 20 of the rear wheel 11 via a chain 19.

That is, the rotation of the rotating shaft of the electric motor 17 causes the rear wheel 11 to rotate.

Reference numeral 21 denotes a battery for supplying power to the motor 17, and reference numeral 22 denotes a controller for controlling the motor.
The battery 21 is housed in a battery box 23 and mounted on a vehicle body.

As shown in FIG. 5, the battery box 23 is integrally formed of a synthetic resin in a box shape that opens to the left of the vehicle body. In the box body 23a having a box shape, four batteries 21 are provided. Partition plate 23 for storage
b are provided. As shown in FIG. 1, the battery box 23 is located at a position close to the upper side of the electric motor 17, and is located at the front of the lower frame (in the rear down position of the down tube 7 and the seat pillar tube 8 in a side view). It is formed so as to extend over substantially the entire area of the space formed between the extending portion) and the rear portion (the portion extending upward in the seat pillar tube 8). By storing the battery 21 in the battery box 23, the battery 21 is disposed above the electric motor 17 and between the head pipe 5 and the seat 10 so as to be detachable from the side of the vehicle body. .
A notch 23c for passing a battery cord (not shown) for connecting the front and rear batteries 21 is formed in each partition plate 23b.

The battery box 23
The three brackets 23d projecting from the opening edge are fixed to the frame 1 by bolting to the battery box brackets 6a, 7a of the main frame 6 and the down tube 7. Further, as shown in FIG. 3, a rear bottom portion of the box body 23a is supported on the upper portion of the electric motor 17 via a rubber damper 24, and a front bottom portion is provided with a rubber damper 25 on the support plate 7b of the down tube 7. Has been supported through.

Reference numeral 26 denotes a battery band for fixing the battery 21 to the battery box 23. The battery band 26 is bolted to a bracket 23e protruding from an opening of the battery box 23 so that the battery 21 is mounted on the vehicle body. It is configured to press from the left side. FIG. 1 shows a state where the battery band 26 is removed.

The controller 22 is shown in FIGS.
As shown in the figure, the battery box 23 is mounted at a position just beside the right side of the vehicle body, and controls the amount of current supplied from the battery 21 to the electric motor 17 in accordance with the amount of operation of the throttle grip 3a of the steering wheel 3. It is configured as follows.

That is, by operating the throttle grip 3a, the rotation speed of the electric motor 17 changes.

Reference numeral 27 denotes a charger for charging the battery 21. The charger 27 is configured to charge the battery 21 by changing an AC 100V power supply to DC 12V. The output side is connected to the battery 21 and the input side is a charging socket 28 located at the rear side of the battery box 23. It is connected to the.

As shown in FIG. 4, the charger 27 is supported and fixed to the main frame 6 via a charger support plate 27a at the rear of the main frame. In FIG. 4, a member denoted by reference numeral 29 located below the main frame 6 is a rear fender.

The charging socket 28 has a structure to which a charging cord (not shown) is connected, and an insertion opening of the charging cord is opened on the left side of the vehicle body. As the charging cord, 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 is used.

In the figure, reference numeral 30 denotes a side cover, 31 denotes a front fender, and 32 denotes a footrest attached to the seat pillar tube 8. The side cover 30
Is disposed at a position just beside the battery box 23 in a portion surrounded by the main frame, the down tube 7 and the seat pillar tube 8, and is configured to cover the left and right sides of the battery box portion.

The side cover 3 located on the left side of the vehicle body
0 has a lid 30a at a portion facing the charging socket 28. The lid 30a is configured to be openable and closable by, for example, pivotally supporting an upper portion thereof on the side cover 30 side. The charging socket 28 is exposed by opening the lid 30a.

As shown in FIG. 1, the front fender 31 has a plurality of slits 31a formed in a mudguard portion behind the front fork 4. When the slit 31a is formed in this manner, the traveling wind is flowed to the rear of the front fender 31 through the slit 31a, so that the traveling wind easily hits the electric motor 17 and the electric motor 17 can be efficiently cooled. The flow direction of the traveling wind is indicated by an arrow A in FIG.

In the electric motorcycle constructed as described above, when the rotation shaft of the electric motor 17 is rotated by operating the throttle grip 3a, the rotational force is transmitted to the rear wheel 11 via the chain 19 and the rear wheel sprocket 20. Become traveling.

The battery 21 is charged by opening the lid 30a of the left side cover 30 and connecting a charging cord to the charging socket 28 in this state.

In order to attach and detach the battery 21,
The operation is performed with the left side cover 30 removed from the vehicle body to expose the battery box 23 and the battery band 26 removed. At this time, the battery 21 is put into and taken out of the battery box 23 from the left side of the vehicle body.
On the other hand, the helmet 15 is
It is taken in and out of .

Accordingly, in the electric motorcycle constructed as described above, the electric motor 17, the battery 21, and the helmet box 9 are positioned vertically between the front wheel 2 and the rear wheel 11, so that the mounting space for these members is limited to the vehicle body. The length of the vehicle body is not lengthened in the front-rear direction, and the weight of the vehicle body is evenly distributed to the front wheel 2 and the rear wheel 11. Further, the electric motor 17 is relatively small on the bottom of the lower frame, the width of which in the front-rear direction gradually increases toward the top as viewed from the side, that is, in the portion of the space surrounded by the lower frame where the width in the front-rear direction is the narrowest. , And a narrow space can be used without waste, and the capacity of the battery box 23 can be increased by effectively utilizing the space formed above the electric motor 17 and having a relatively large width in the front-rear direction. . The battery box 23 is formed so as to extend over substantially the entire space formed between the front part and the rear part of the lower frame in a side view, and the helmet box 9 is provided between the head pipe 5 and the seat front end. Since the space is formed so as to extend over substantially the entire area of the battery box 23, the capacity of the battery box 23 and the helmet box 9 can be increased by maximizing the space. Further, the helmet box 9 and the battery box 23 are formed separately, and the helmet box 9 is disposed on the upper side and the battery box 23 is disposed on the lower side with the main frame 6 interposed therebetween. Since the helmet box 9 and the battery box 23 are arranged side by side in the vertical direction, the frame 1 forms a loop with the upper frame and the lower frame to secure sufficient rigidity. And the helmet box 9 and the battery box 2
3 can have a large capacity. In addition, the loading / unloading of the luggage and the attachment / detachment of the battery 21 can be performed independently, so that the luggage in / out luggage and the attachment / detachment workability of the battery 21 can be improved.

In this embodiment, an example is shown in which the controller 22 is mounted on the right side of the battery box 23.
As shown in FIG. 6, it can be disposed on the front side of the down tube 7.

FIG. 6 is a view showing another example in which the mounting position of the controller is changed. In FIG. 6, the same reference numerals are given to the same or equivalent members as those described in FIG. 1 and detailed description is omitted. . In FIG. 6, the controller 22 is fixed to the lower front portion of the down tube 7. By doing so, the controller 22 is controlled by the front fender 31
Is located just behind the slit 31a,
The air is cooled by the traveling wind A passing through the slit 31a.

[0038]

As described above, the electric motorcycle according to the present invention has the upper frame extending rearward substantially horizontally from the head pipe, and the lower frame bent downward between the head pipe and the seat. A front portion extending downward from the head pipe to the lower frame, a bottom portion extending substantially horizontally rearward from a lower end of the front portion, and a rear portion extending upward from the rear end of the bottom portion and connected to the upper frame; A motor for driving a rear wheel via a power transmission member is fixed on the bottom portion, and the power is supplied to the motor under the upper frame and close to the upper side of the motor. A battery storage box that houses a plurality of batteries and has an opening formed on a side surface thereof so that these batteries can be attached to and detached from the side of the vehicle body is provided. A baggage storage box having an opening formed on an upper surface so as to allow luggage to be taken in and out from above, disposed in proximity to an upper side of the battery storage box; And forming the luggage storage box so as to extend over substantially the entire space formed between the head pipe and the seat front end, Since the motor, the battery storage box, and the luggage storage box are arranged vertically, the motor, the battery, and the luggage storage box are positioned vertically between the front wheel and the rear wheel. It does not become longer in the front-rear direction, and moreover, the weight of the vehicle body is substantially evenly distributed to the front wheels and the rear wheels.

Accordingly, it is possible to obtain an electric motorcycle in which a required amount of batteries can be mounted while the wheelbase is suppressed from becoming unnecessarily long and the seat height is prevented from increasing.

Also, relative to a portion on the bottom side of the lower frame, the width of which in the front-rear direction gradually increases as it goes upward in a side view, that is, the portion of the space surrounded by the lower frame in which the width in the front-rear direction is the narrowest. A narrow motor can be disposed to use the narrow space without waste, and the battery storage box and luggage storage box can be effectively used by making use of the relatively wide space in the front-rear direction formed above the motor. Capacity can be increased. The battery storage box is formed so as to extend over substantially the entire space formed between the front part and the rear part of the lower frame in a side view,
The luggage storage box is formed so as to extend over substantially the entire space formed between the head pipe and the front end of the seat. Can be achieved. Furthermore, the luggage storage box and the battery storage box are formed separately,
The luggage storage box is placed on the upper side of the upper frame and the battery storage box is placed on the lower side, and the luggage storage box is opened upward and the battery storage box is opened to the side, so the luggage storage box and the battery storage box are While adopting the configuration of arranging vertically, the body frame forms a loop with the upper frame and the lower frame while ensuring sufficient rigidity,
It is possible to increase the capacity of the luggage storage box and the battery storage box without the body frame being in the way. Also,
The loading / unloading of the luggage and the attachment / detachment of the battery can be performed independently, so that the luggage loading / unloading property and the battery attaching / detaching workability can be improved.

Further, since the electric motor, the battery, and the luggage storage box are positioned substantially at the center in the front-rear direction of the vehicle body, there is an effect that the mass can be concentrated.

[Brief description of the 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.

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

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a perspective view showing a battery box used for the electric motorcycle according to the present invention.

FIG. 6 is a diagram showing another example in which the mounting position of the controller is changed.

[Explanation of symbols]

 1 frame 7 down tube 8 seat pillar tube 9 helmet box 11 rear wheel 12 rear arm 17 motor 19 chain 21 battery

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-217384 (JP, A) JP-A 1-275281 (JP, A) JP-A 62-155181 (JP, A) 63064 (JP, U) Japanese Utility Model 63-1392 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62J 9/00 B60L 11/18 B62M 7/02

Claims (1)

(57) [Claims] 1. A substantially horizontal rearward extension from a head pipe.
An upper frame, and a lower frame that is bent downward between the head pipe and the seat;
Front extending downward from the pipe and the lower end of this front
From the bottom that extends substantially horizontally to the rear, and the rear end of this bottom
After extending upward and connecting to the upper frame
And a rear wheel on the bottom portion.
The motor driven via the connecting member is fixed,
Below the arm and close to the top of the motor,
Stores multiple batteries for powering the motor and
Battery on the side so that it can be removed from the side of the vehicle
With a battery storage box with an opening formed
The battery compartment above the upper frame
Luggage can be put in and out from above, close to the top of the box
A luggage storage box with an opening formed on the top
The front side of the lower frame when the battery storage box is viewed from the side.
Extends over substantially the entire space formed between
Formed so that the luggage storage box and the head pipe
Over the entire area of the space formed between the front end of the seat
Formed so as to extend, the motor, battery storage box and
An electric motorcycle, wherein luggage storage boxes are arranged vertically .