JPH11301551A - Electric bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bicycle with low center of gravity, good fore-aft weight balance, good assembling performance and good maneuverability by making an electric drive unit water proof and providing as breathing means an air plug having a hat-shaped porous sheet made of laminated fiber layers to simplify the water proof structure. SOLUTION: To integrate an electric drive unit, a motor, a reduction gear, a sensor, and a control circuit are accommodated in an electronic drive unit cover and the cover is closed. The integrated electric drive unit is assembled under a main pipe and a saddle pipe of a vehicle body. A breather hole 17 is provided on an upper face 10 on the installation side of electric drive unit to the vehicle body, and a breather sheet 16 having breathing function is fixed so as to block the breather hole 17. The characteristic of the breather sheet 16 is such that it permits air but does not permit water to go through. Accordingly, the pneumatic pressure inside the unit is maintained constant. A convex portion is formed on an upper face of the electric drive unit and breathing means is provided at the convex portion. As a result, water is prevented from entering breathing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electric bicycle.

[0002]

2. Description of the Related Art Conventionally, a motor, a speed reducer, a sensor, and a control circuit are conventionally constructed. However, since all of them are not integrated, they are separately assembled to a main body, and it is necessary to take waterproof measures for individual elements. there were.

[0003]

Taking waterproof measures for each of a motor, a speed reducer, a sensor, and a control circuit requires a lot of work and complicates the structure. An object of the present invention is to provide a simplified electric drive device.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a human-powered driving device that drives driving wheels by using a power transmission mechanism with a torque generated by a driver, and an electric driving device that assists driving by the human-powered driving device. A rechargeable battery that supplies electric power to the electric driving device, wherein the electric driving device determines the auxiliary electric torque based on the auxiliary driving electric motor that generates the auxiliary electric torque and the human power torque and the traveling speed. A control circuit for controlling the auxiliary driving electric motor so as to generate the auxiliary electric torque, the electric bicycle having a very simplified waterproof structure, small size, light weight and light weight. You can do it.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric bicycle according to the present invention is a human-powered driving device for driving driving wheels by using a power transmission mechanism with a torque generated by a driver, and an electric driving device for assisting driving by the human-powered driving device. And a rechargeable battery that supplies power to the electric driving device, wherein the electric driving device generates an auxiliary driving electric motor, and generates the auxiliary electric torque based on the human-powered torque and the traveling speed. And a control circuit for controlling the auxiliary driving electric motor so as to generate the auxiliary electric torque, wherein the electric driving device has a waterproof structure.

Furthermore, by providing a ventilation plug equipped with a sheet hat-shaped perforated plate laminated with a fiber layer as breathing means of the electric driving device, air is allowed to pass through the waterproof structure of the electric driving device without passing water. To form a ventilation path.

[0007] Further, the electric drive device has a projection on a part thereof,
By providing a ventilation cap provided with a sheet hat-shaped perforated plate on which a fiber layer is laminated as a breathing means on the convex portion, water does not easily flow into the breathing means.

[0008] Further, by providing a concave and convex portion serving as a drainage means in a part of the electric drive device, water does not flow into the breathing means. Accordingly, there is no fear that the waterproof effect is degraded due to dust and rust accumulated inside the bicycle, and the dust and rust can be washed away by rainwater and the waterproof effect can be maintained for a long time.

Further, the breathing sheet may be fixed by using a fastener or a screw used in the electric drive device. Accordingly, the electric drive device can be fixed without adding a waterproofing part, and a simplified electric drive device can be manufactured, so that the electric drive device can have a structure that does not interfere with the electric bicycle.

Further, by disposing the breathing sheet between the bracket that fixes the electric drive device and the electric drive device, muddy water can be avoided during bicycle running, and the waterproof structure can be simplified. Become.

[0011]

(Embodiment 1) Hereinafter, an electric bicycle according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an external view of an electric bicycle showing the configuration of this embodiment. An electric drive unit 1 in which a motor, a speed reducer, a sensor, and a control circuit are integrated is assembled below a main pipe 2 and a saddle pipe 3 of a vehicle body with mounting screws. Since the electric drive device 1 is integrated, the assembling to the vehicle body is easy, and since the electric drive device 1 is located almost at the lower center of the vehicle body, it has a low center of gravity and realizes an electric bicycle with good operability. Further, in order to integrate the electric driving device, a motor, a speed reducer, a sensor, and a control circuit are accommodated in the electric driving device cover, and the electric driving device cover is closed. At this time, there is a breathing hole 17 on the upper surface of the electric drive device cover,
It is closed with a breathing sheet 16 and has a waterproof structure.

FIGS. 2 and 3 are schematic views of an electric drive device according to the present invention. FIG. 3 shows the electric drive device 1 and the ABC of FIG.
The figure cut | disconnected by DEF is shown. The electric drive device 1 has a motor 4, a speed reducer 5, a sensor 6, and a control circuit 7 integrated therein. When the crankshaft 8 is rotated by pedaling, the load torque is detected by the sensor 6, and the control circuit 7 A built-in microcomputer determines the output of the motor, drives the motor 4, and outputs to the sprocket 9 via the reduction gear 5 by combining with human power.

Although the temperature of the motor and control circuit of the electric bicycle rises due to the current during operation, it is inevitable that the motor and the control circuit will be rapidly cooled by rain or water on the road. Since the air in the electric drive repeatedly expands and contracts due to such temperature changes, appropriate breathing means is required.However, the breathing means may in some cases draw water, and its installation location and method must be carefully selected. No. When motors and control units are assembled in a distributed manner, the necessary space must be increased if appropriate respiratory means are provided for each.

FIG. 4 is a structural view of the breathing means of the electric drive device according to the present invention. A breathing sheet 16 having a breathing hole 17 and having a breathing action so as to close the breathing hole 17 is fixed to the upper surface 10 on the side where the electric drive device is mounted on the vehicle body.
The air pressure in the electric drive device 1 is kept constant through the breathing sheet 16. The breathing sheet 16 has a hole that is smaller than water molecules, and has a characteristic that air can pass through but water cannot enter.

FIG. 7 shows a method of fixing the electric drive device according to the present invention to an electric bicycle. The electric driving device is fixed with screws 19 to a bracket 18 connected to the main pipe 2 and the saddle pipe 3 of the electric bicycle. The bracket 18 has a U-shape.
The frame strength can be increased to hold the frame. By arranging the breathing hole 17 between the upper surface 10 on which the electric driving device is mounted and the bracket portion 18, the waterproof structure can be simplified without muddy water while the bicycle is running, and the device can be used for a long time. You can make an electric bicycle. The electric bicycle is provided with a plastic cover to protect the battery, the switch, and the LED. However, it is also possible to prevent a muddy water by providing a breathing hole in the cover.

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 5 shows a method of attaching the breathing means of the electric drive device according to the present invention.

In consideration of the flow of water transmitted from the pipes, seats, covers, batteries, etc. of the electric bicycle in rainy weather, a convex portion is provided on the upper surface of the electric drive device 1 so that water does not flow down to the breathing sheet 16. A breathing means is provided on the projection. With this configuration, the breathing unit is at a higher position in the upper surface of the electric driving device, and water flowing on the upper surface of the electric driving device does not flow into the breathing unit. Further, by providing unevenness on the upper surface of the electric drive device, water can be prevented from flowing into the breathing means.

(Embodiment 3) Hereinafter, Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 6 shows a method of fixing the breathing means of the electric drive device according to the present invention. Battery, key switch and L
A harness is connected from the outlet rubber 11 to perform external wiring with the ED. Note that a metal fixing plate 12 is attached to fix the outlet rubber 11.
The fixing plate 12 has a structure that hangs on the concave portion of the rubber outlet 11, and is not pulled out or pushed by the fixing plate 12 even if the rubber outlet 11 or the harness is pulled or pushed.

In a method of fixing the breathing sheet 16 made of a fluorine film or the like having a breathing action, a breathing hole 17 for breathing is provided on the wall of the auxiliary driving device, and the periphery of the breathing hole 17 is fixed with an adhesive. In order to increase the reliability with respect to aging and durability, the structure is such that the breathing sheet 16 is pressed in common with the fixing plate 12 used for the rubber outlet.

Further, a method of fixing the breathing sheet 16 using a screw portion used in the electric drive device 1 may be used.

[0022]

According to the first, second and third aspects of the present invention, the electric bicycle has a motor, a speed reducer, sensors, and a control circuit which are integrally formed and attached to the center and the lower part of the bicycle body. Thus, it is possible to provide a bicycle having good weight balance between the front and rear, good bicycle assemblability and good operability.

According to the fourth and fifth aspects of the present invention, in order to ensure waterproofness of the electric bicycle, the electric bicycle and the breathing sheet have an action of protecting against external factors such as rainwater, dust and rust. It is possible to provide a lightweight and simple auxiliary driving device which increases the reliability of fixing.

According to the sixth aspect of the present invention, in order to ensure the waterproofness of the electric bicycle, the reliability of the electric drive device and the breathing seat can be reliably fixed when the breathing seat is mounted, and the fixing method is simplified. It is intended to provide an electric drive device 1 to be formed.

According to the seventh aspect of the present invention, there is provided an electric drive device capable of preventing muddy water during running of a bicycle and simplifying a waterproof structure.

[Brief description of the drawings]

FIG. 1 is an external view of an electric bicycle according to a first embodiment of the present application.

FIG. 2 is a schematic diagram of the electric drive device.

FIG. 3 is a sectional view of the electric drive device.

FIG. 4 is a structural view of a breathing means of the electric drive device.

FIG. 5 is a diagram showing attachment of a breathing sheet to the electric drive device of the second embodiment.

FIG. 6 is a diagram showing a method of fixing a breathing unit of the electric drive device according to the third embodiment.

FIG. 7 is a view showing the electric drive device fixed to an electric bicycle.

[Description of Signs] 1 Electric drive device 2 Main pipe 3 Saddle pipe 4 Motor 5 Reduction gear 6 Sensor 7 Control circuit 16 Respiration seat

Claims (7)

[Claims] 1. A human-powered driving device that drives driving wheels using a power transmission mechanism with a torque generated by a driver, an electric driving device that assists driving by the human-powered driving device, and an electric power that is supplied to the electric driving device. With a rechargeable battery to supply,
The electric driving device determines the auxiliary electric torque based on the human-powered torque and the traveling speed, and the auxiliary driving electric motor generates the auxiliary electric torque. An electric bicycle, comprising: a control circuit for controlling the electric bicycle, wherein the electric driving device has a waterproof structure. 2. The electric bicycle according to claim 1, wherein the electric drive device is provided with breathing means having a waterproof function. 3. The electric bicycle according to claim 2, wherein a breathing plug fitted with a sheet-cap-shaped perforated plate having a laminated fiber layer is used as a breathing means of the electric drive device. 4. The electric bicycle according to claim 2, wherein the electric drive device has a convex portion on a part thereof, and the convex portion is provided with breathing means. 5. The electric bicycle according to claim 2, wherein an uneven portion serving as a drainage means is provided in a part of the electric drive device. 6. The electric device according to claim 3, wherein the fixing means of the electric drive unit and the fixing means of the ventilation plug provided with the sheet hat-shaped perforated plate on which the fiber layers serving as the breathing means are laminated are shared. bicycle. 7. An air vent provided with a sheet hat-shaped perforated plate on which a fiber layer serving as a breathing means is laminated is provided between a frame for fixing the electric driving device and the electric driving device. The described electric bicycle.