JP3301772B2 - Motor cooling device for electric scooter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor cooling device for an electric scooter.

[0002]

2. Description of the Related Art Conventionally, scooter type vehicles have used an internal combustion engine which uses gasoline as a power source, burns the gasoline and converts the power into power, and drives the vehicle with the power. However, in an internal combustion engine that uses gasoline as a fuel, measures against vibration and noise are indispensable, and measures must be taken against heat generated by cooling the internal combustion engine and exhaust gas. It is difficult to take countermeasures. In addition, it has been pointed out that various parts such as a carburetor, an air cleaner, and a muffler are required as ancillary equipment of an engine, and there are various problems such as a limited gasoline resource for fuel.

[0003] Therefore, if an electric motor is driven by driving an electric motor by a battery and the rear wheels are rotated by the motor, the above-mentioned pollution problem does not occur, the number of equipment with an engine is small, and heat measures are not required. Although very preferred, no motorized scooter-type vehicle with a unit swing engine has yet been provided. If the electric motor is used as the engine of the power source, the electric motor has a heat-generating effect during operation, so that cooling must be considered even if not as much as the internal combustion engine.

In the case of the unit swing engine system, if the electric motor is provided with a radiation fin, the unit swing engine may hit the bottom of the storage chamber of the vehicle body when swinging up and down, or the radiation fin may hinder the detachment of the rear wheel. There are problems such as hindrance.

The present invention has been made in consideration of the above-mentioned circumstances, and an electric scooter which does not hinder the swing of a unit swing engine and does not hinder the attachment / detachment of a rear wheel while increasing the cooling effect of an electric motor. It is an object of the present invention to provide a motor cooling device.

[0006]

According to a first aspect of the present invention, there is provided a motor cooling device for an electric scooter, comprising: a rear wheel and a plurality of radiating fins; And a unit swing engine comprising the above-described electric motor and an engine case mounted with the above-mentioned electric motor and supporting the rear wheel on a rear rear wheel axle, to constitute a unit swing engine, and a unit swing engine using the electric motor as a power source. Using a V-belt for the transmission mechanism of
A unit swing engine capable of detaching the rear wheel from the electric motor disposition side, comprising a seat and an article storage chamber capable of storing a helmet disposed below the seat,
In a motor cooling device for an electric scooter suspended vertically up and down on a vehicle body at a lower portion of a rear body covered with a vehicle body cover, the vehicle body cover shape of the rear body is a rear-upward shape toward a vehicle rear portion. The electric motor is disposed at a front portion of the engine case and in parallel with the rear wheel axle so that a center of the motor is lower than a deepest portion of the article storage chamber and partially overlaps a contour of a lower portion of the rear body in a vehicle side view, and A plurality of radiating fins extending in the front-rear direction
A front part of the radiating fins and the vehicle body are disposed on an outer periphery of a motor case of the electric motor so that the rear fin is located substantially within the width of the rear body and at least a part of the rear wheel is located outside the vehicle width direction in plan view of the vehicle. While securing a gap with the frame,
When the unit swing engine swings upward, a traveling wind is provided between the radiation fins by securing a space between the radiation fins on the upper side of the outer periphery of the electric motor and the front part of the vehicle and the bottom surface of the article storage chamber and the body cover. And the radiating fins can pass between the body frame or the article storage room, and further, the shape of the radiating fins extending toward the rear of the vehicle is
The length is set so as not to interfere when the electric motor is mounted on the unit swing engine when the rear wheel is attached or detached.

According to a second aspect of the present invention, there is provided a motor cooling device for an electric scooter, comprising: an electric motor having a rear wheel and a plurality of radiating fins in a motor case; An engine case having the electric motor mounted thereon and the rear wheel pivotally supported on a rear rear wheel shaft is unitized to form a unit swing engine, and a V-belt is provided in a transmission mechanism of the unit swing engine using the electric motor as a power source. A unit swing engine that allows the rear wheel to be attached to and detached from the side on which the electric motor is provided, a seat and an article storage chamber in which a helmet disposed below the seat can be stored; A motor cooling device for an electric scooter suspended vertically on a vehicle body at a lower portion of a rear body covered by The shape of the body cover of the body is a rear-up shape toward the rear of the vehicle, and the electric motor is arranged parallel to the rear wheel axis so that at least one of the electric motors is located below the deepest part of the article storage room at the front of the engine case. A plurality of heat dissipating fins are provided on the outer periphery of the motor case of the electric motor so as to be substantially within the width of the rear body in a plan view of the vehicle and at least partially outside the rear wheel in the vehicle width direction. In addition to securing a clearance between the front portion of the radiating fin and the vehicle body frame, when the unit swing engine swings upward, the radiating fin on the upper side of the outer periphery of the electric motor and the radiating fin on the front side of the vehicle and the article storage chamber are provided. By securing a space between the bottom surface and the vehicle body cover, traveling wind can be passed between the radiation fins and between the radiation fins and the body frame or the article storage room, The one in which the engine mounting boss is disposed between the heat radiating fins of the two or more electric motors.

According to a third aspect of the present invention, there is provided a motor cooling device for an electric scooter, wherein a generator is disposed on a side of the electric motor opposite to a vehicle width direction. It was done.

[0009]

The traveling wind hits the radiating fins as the scooter travels, and heat is exchanged on the entire surface to dissipate the heat of the electric motor. Even if the engine case of the unit swing engine swings upward due to the running of the scooter, the upper side of the radiation fin does not hit the lower surface of the vehicle body, so it is safe,
Also, the rear wheel can be easily attached and detached.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In the scooter, a steering shaft of a front wheel 2 is pivotally supported at a front portion of a vehicle body frame 1 and a handle 3 is mounted on an upper portion thereof as shown in a schematic side view in FIG.
A seat 4 is provided at an upper rear portion of the body frame 1, and an article storage room 6 for storing a helmet 5 and the like is provided below the seat 4.
Is provided. The article storage room 6 is opened and closed by opening and closing the sheet 4.
You can put your luggage in and out.

An engine case 9 of a unit swing engine 8 is mounted on a suspension shaft 7 at a rear portion of the body frame 1.
The rear wheel 11 is pivotally supported at the rear of the engine case 9, and the upper part of the engine case 9 and the vehicle body frame 1 are connected by a cushion unit 12 to form an electric power unit. are doing.

The engine case 9 is shown in FIGS.
As shown in FIG. 5, a notch step 9b which is one step lower is formed at a position close to the suspension part 7 on the opposite side to the part 9a in which the power transmission mechanism 13 is provided and extends rearward along one side of the rear wheel 11, An electric motor 14 is attached to the notch 9b with a bolt 15. The electric motor mounting surface of the notch step 9b is located outside the maximum diameter portion of the rear wheel 11.

The motor case 14a of the electric motor 14
A plurality of radiating fins 16, 16,... Perpendicular to a direction perpendicular to the axis of the radiating fins 16 are provided on the outer periphery at predetermined intervals. As shown in FIG. 1, the front side of the heat radiation fin 16 has a slope 16b whose upper side 16a is gentle on the front side of the vehicle body.
A steep slope 16c is formed on the rear side of the vehicle body to form a mountain shape. Thus, when the engine case 9 swings upward, the gently inclined surface 9b is positioned on the lower surface of the vehicle body, that is, in FIG.
As shown by a dashed line, the shape does not hit the bottom surface 6a of the article storage chamber 6. As shown in FIG. 2, the radiating fins 16, 16 are disposed so as to be located within the width of the rear body 1 a and outside the rear wheel 11 in the vehicle width direction in a plan view of the vehicle.

The front and rear of the radiation fins 16 are formed to extend in the front-rear direction of the vehicle body. However, the heat dissipating fins 16 extending to the rear of the vehicle body have a length that does not hinder the removal of the rear wheel 11 from the axle as shown by a chain line in FIG. It has a length that does not hinder.

When the electric motor 14 is arranged above the engine case 9 as shown in FIGS. 4 and 5, that is, above the position where the drive shaft is placed, there is a space on the rear wheel 11 side. The rear side of the vehicle body can be lengthened and the front side can be shortened. Also, the electric motor 14 is
When more than one fins are provided, the engine suspension boss 17 can be provided between the radiating fins 16, and the dead space can be effectively used.

As shown in FIG. 7, when the electric motor 14 is covered with a cover 18 of a part of the engine case 9 and has a forced air cooling structure with a fan 24, the shape of the radiation fin 16 is formed so as to match the internal space shape. Is done.

Power transmission mechanism 13 in engine case 9
The gear 2 is connected directly to the output shaft 19 of the electric motor 14 as shown in FIG.
0, 21 and a variable speed V
A drive pulley 23 of a belt transmission mechanism is provided, and a cooling fan 24 is provided on an outer surface of the drive pulley 23.
Is provided.

As shown in FIG. 3, a transmission drive shaft 25 is rotatably supported by bearings 26 and 26 behind the engine case 9, and a driven pulley 27 of a V-belt speed change mechanism is provided on the shaft 25. A V-belt is hung between these pulleys 23 and 27, and rotation is transmitted. A transmission drive gear 28 is fixed to the transmission drive shaft 25, and the transmission 28 is transmitted to the gear 32 of the rear wheel shaft 31 via intermediate gears 29 and 30 to form a transmission gear mechanism 35. Is transmitted to the rear wheel 11. In the figure, reference numeral 33 denotes a generator, which obtains electric power for a turn signal, a horn, and a light through a circuit different from a battery for the electric motor 14.

Accordingly, when the electric motor 14 is driven, the drive pulley 23 rotates, and the driven pulley 27 of the V-belt transmission mechanism transmits the transmission gears 28, 29, 30, 3
2, the rear wheel shaft 31 rotates, and the rear wheel 11 is driven to drive the vehicle.

The traveling wind generated by the traveling hits the radiating fins 16 on the peripheral surface of the electric motor 14, and the heat generated from the electric motor 14 exchanges heat with the traveling wind on the surface of the radiating fins 16 and is cooled. As shown in FIGS. 2 and 5, at least a part of the radiating fins 16 is located outside the rear wheel 11 in the vehicle width direction in order to enhance the cooling effect. Even if the engine case 9 swings up and down, the upper side 16a of the radiation fin 16 is shaped so as not to contact the bottom 6a of the article storage room 6 of the vehicle body. The space between 16 and 16 becomes a passage of the traveling wind, and the cooling effect can be improved. In addition, the unit swing engine 8 swings without any trouble even if the radiation fins 16 are provided, and the internal volume of the article storage room 6 does not decrease. Also, the radiation fins 16 do not become an obstacle when the rear wheel 11 is attached or detached. In the case of the forced air cooling system as shown in FIG. 7, cooling air from a fan 24 is applied through a cover 18 that covers the electric motor 14, heat is released through the radiation fins 16, and the electric motor 14 is cooled.

[0022]

According to the motor cooling device for an electric scooter according to the present invention, even in a scooter that uses an electric motor as a power source, even if the vehicle employs a unit swing engine system, the engine is driven by the vertical movement of the rear wheels. Radiation fins that do not affect the vehicle body when the case swings up and down are provided on the peripheral surface of the motor case of the electric motor. The radiating fins can be effectively dissipated, and the air that has cooled the radiating fins can be effectively prevented from trapping inside the rear body, effectively preventing overheating of the electric motor. The lowering can be prevented, and the traveling performance of the electric scooter can be improved. Also, even if the rear wheel is adjacent to the electric motor, the radiation fins of the electric motor do not impair the detachability of the rear wheel, and the rear wheel can be attached and detached without removing the electric motor, improving workability. Also, the volume of the article storage room of the vehicle body is not reduced. Since the heat of the electric motor can be dissipated by effectively utilizing the dead space of the vehicle body, there is no need to take any special cooling means, and the manufacturing cost can be substantially the same as the conventional one.

[Brief description of the drawings]

FIG. 1 is a side view showing a scooter to which the present invention is applied.

FIG. 2 is a plan view of the scooter shown in FIG.

FIG. 3 is a vertical sectional plan view of a unit swing engine.

FIG. 4 is a side view showing an embodiment of a scooter having a different mounting position of the electric engine.

FIG. 5 is a plan view of the scooter shown in FIG. 4;

FIG. 6 is a horizontal sectional view showing another example of mounting the electric motor.

FIG. 7 is a horizontal sectional view showing a case where the electric motor is covered with a cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame 6 Article storage room 7 Suspension part 8 Unit swing engine 9 Engine case 11 Rear wheel 12 Cushion unit 13 Transmission mechanism 14 Electric motor 16 Radiation fin 31 Rear wheel axle

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 39/00 B62K 11/10

Claims (3)

(57) [Claims] 1. A unit swing comprising: a rear wheel, an electric motor having a plurality of heat dissipating fins in a motor case, and an engine case to which the electric motor is mounted and which supports the rear wheel on a rear rear wheel shaft. A unit swing engine that constitutes an engine, uses a V-belt as a transmission mechanism of a unit swing engine that uses the electric motor as a power source, and allows the rear wheel to be detachable from a side on which the electric motor is provided. An article storage chamber capable of storing a helmet disposed below, and a motor cooling device for an electric scooter suspended vertically on a vehicle body at a lower part of a rear body in which a vehicle body frame is covered by a vehicle body cover, The shape of the body cover of the rear body is raised rearward toward the rear of the vehicle, and the electric motor is A plurality of heat dissipating fins arranged at the front of the vehicle and in parallel with the rear wheel axis so that the center of the motor partially overlaps the contour of the lower part of the rear body below the deepest part of the article storage chamber and extends in the front-rear direction of the vehicle. Is disposed on the outer periphery of the motor case of the electric motor such that at least a part of the rear fin is located substantially outside the width of the rear body in a vehicle plan view and the rear wheel is located outside the vehicle in the vehicle width direction. When the unit swing engine swings upward, a space is formed between the radiating fins on the upper side of the outer periphery of the electric motor and the front side of the vehicle, the bottom surface of the article storage chamber, and the vehicle body cover. To ensure that the traveling wind can pass between the radiating fins and between the radiating fins and the vehicle body frame or the article storage room. A motor cooling device for an electric scooter, wherein the electric motor has a length set so as not to interfere with the electric motor mounted on a unit swing engine when the rear wheel is attached or detached. 2. A unit swing comprising a rear wheel, an electric motor having a plurality of radiating fins in a motor case, and an engine case to which the electric motor is attached and which supports the rear wheel on a rear rear wheel shaft. A unit swing engine that constitutes an engine, uses a V-belt as a transmission mechanism of a unit swing engine that uses the electric motor as a power source, and allows the rear wheel to be detachable from a side on which the electric motor is provided. An article storage chamber capable of storing a helmet disposed below, and a motor cooling device for an electric scooter suspended vertically on a vehicle body at a lower part of a rear body in which a vehicle body frame is covered by a vehicle body cover, The shape of the body cover of the rear body is set to the rear ascending shape toward the rear of the vehicle, and the electric motor is mounted on the front of the engine case. At least two are arranged in parallel with the rear wheel axle so that at least one of them is below the deepest part of the article storage room, and is arranged on the outer periphery of the motor case of the electric motor substantially within the width of the rear body in plan view of the vehicle. A plurality of radiating fins are disposed so that at least a part of the fin is located outside the vehicle width direction, a gap between a front portion of the radiating fins and a vehicle body frame is secured, and the unit swing engine is moved upward. When swinging, the space between the radiating fins on the upper side of the outer periphery of the electric motor and the front side of the vehicle and the bottom surface of the article storage chamber and the vehicle body cover is ensured, so that the traveling wind can be distributed between the radiating fins and between the radiating fins and the vehicle body frame. Alternatively, it is possible to pass between said two or more electric motors, and said boss for engine suspension is disposed between said radiation fins of said two or more electric motors. Cooler motor cooling device. 3. On the opposite side of the electric motor in the vehicle width direction,
The motor cooling device for an electric scooter according to claim 1 or 2, wherein a generator is provided.