JPH09254861A - Electric assisted power bicycle - Google Patents

Abstract

(57) An object of the present invention is to efficiently use electric power of a battery of a bicycle having a small capacity to minimize consumption and to assist a braking device of the bicycle. SOLUTION: A regenerative braking device 2 provided on an electric auxiliary power motor attached to a bicycle is connected to a rear wheel by performing a regenerative braking operation control by a regenerative braking means A mounted on a fulcrum of a brake lever. Puts the motor in regenerative charging mode and executes regenerative braking. In this way, since the regenerative braking device 2 operates only when the vehicle is in a traveling state where braking or deceleration is required by turning the switch on and off, the bicycle driver does not feel discomfort during inertial traveling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power assisted bicycle having an electric power assisting device including a battery and a motor, and more particularly to an electric power assisting device having a regenerative braking control device that operates a motor as a generator to brake the bicycle. Regarding bicycles.

[0002]

2. Description of the Related Art In a bicycle having an electric auxiliary power unit composed of a battery and a motor, a regenerative braking system which uses the power motor as a generator during running, such as used in an electric vehicle, has not been used. This is because deceleration occurs due to the operation of the regenerative braking device during traveling at a constant speed, and therefore, there is a feeling of strangeness in inertial traveling as compared with a bicycle without an electric auxiliary power unit. Therefore, in order to decelerate and brake a bicycle equipped with an electric power assist device, a braking device (brake) such as a brake shoe provided on the front wheels and rear wheels is used as in a normal bicycle.

[0003]

However, the battery capacity of a bicycle having a conventional electric auxiliary power unit is much smaller than that of an electric vehicle such as an electric vehicle. Moreover, since the regenerative braking device used in the electric vehicle is not adopted, the battery of the bicycle having a small capacity consumes electric power in a short time, and there is a problem that the braking device cannot be assisted. is there.

The present invention has been made in view of the above circumstances, and provides an electrically assisted power bicycle that efficiently uses battery power to minimize consumption and assists a bicycle braking device. The purpose is to do.

[0005]

In order to achieve the above object, the present invention is directed to an electric power assisted bicycle having an electric power assist unit composed of a battery and a motor, in which the motor is operated as a generator to charge the battery and drive transmission of the bicycle. This is achieved by a configuration including regenerative braking means that applies braking to the system and regenerative control means that is attached to a brake lever of a bicycle and controls the operation of the regenerative braking means. Further, the regenerative control means is provided with a volume for detecting the amount of displacement of the brake lever, and by charging the battery with the amount of power generation corresponding to the amount of displacement of the brake lever, braking corresponding to the amount of displacement is applied to the drive transmission system of the bicycle. With the added structure, the effect of the present invention can be exhibited more effectively.

[0006] As another configuration, in an electrically assisted power bicycle having an electrically assisted power unit composed of a battery and a motor, regenerative braking is performed in which the motor is operated as a generator to charge the battery to apply braking to the drive transmission system of the bicycle. Means, a strain gauge that is installed at a position where distortion occurs during braking in the brake system, and detects the amount of strain, and regenerative braking means is controlled so that the battery is charged with the amount of power generation according to the amount of strain detected by the strain gauge. It is also possible to adopt a configuration having a regeneration control unit for

As described above, according to the electrically assisted power bicycle according to the present invention, first, the switch which is the regeneration control means is attached to the brake lever, and the switch is turned on in accordance with the operation of the brake lever, so that the battery is generated by the motor power generation. Charge it and apply braking to your bicycle. Furthermore, by providing the regeneration control means with a volume for detecting the amount of displacement of the brake lever, it is possible to carry out smoother motor power generation.

Further, as in a further structure of the present invention, in an electric power assisted bicycle, a regenerative braking device, a volume for detecting a displacement amount of a brake lever attached to a brake lever, and a strain amount attached at a position where a strain occurs during braking. By providing a regenerative braking control means consisting of a combination of a strain gauge for detection, a display for displaying a signal from the regenerative braking device, etc., regenerative charging is not performed during inertial running at a constant speed, which is exactly the same as a conventional bicycle. Although the vehicle is in a running state, the regenerative braking device works only in a running state where braking or deceleration is required, so that the bicycle driver does not feel discomfort.
Due to the auxiliary function of the speed reducer, braking by human power can be made extremely small even on a long downhill, and the effect of the battery can be lengthened.

Further, since the regenerative braking is continuously changed without providing steps for stable running of the bicycle, there is no impact due to the operation of the regenerative braking device, and more efficient regenerative charging can be performed. it can. In addition, the bicycle driver shifts the gears to a higher ratio, which increases the motor speed for the same bicycle speed,
More regenerative energy can be generated than before shifting.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is an explanatory diagram for explaining the overall configuration of the first embodiment of the present invention. In the figure, 1 is a bicycle, 2 is a regenerative braking device provided on an electric auxiliary power motor,
Reference numeral 6 is a brake shoe provided on the front and rear wheels. The regenerative braking device 2 is provided with a CPU, a ROM, a RAM, an input / output port (for a display, a motor, etc.),
Sends and receives data and signals to and from external devices.

At the brake lever fulcrum, a switch A which is a regeneration control means is mounted. As such a switch, a limit switch or the like is used, for example. The switch A is turned on by the operation of the brake lever 5, and when the operation of the regenerative braking device 2 is started, the motor connected to the rear wheels is rotated to be in the regenerative charging mode, and the regenerative braking operates.

In this way, the regenerative charging mode is controlled by turning on / off the switch A. Therefore, during inertial running of the bicycle 1 at a constant speed, regenerative charging is not performed and the bicycle is in the same traveling state as a conventional bicycle. By operating the brake, the switch A is turned on and the bicycle is regeneratively charged in the regenerative charging mode. I do. In other words, the regenerative braking device 2 operates only when the vehicle is in a traveling state that requires braking or deceleration,
Bicycle drivers will not feel discomfort during inertial driving. Further, the deceleration by the regenerative braking device 2 also functions as an auxiliary of the conventional deceleration device, and it becomes possible to obtain a stronger braking force. This makes it possible to obtain an effect that makes it almost unnecessary to use manual braking such as a long downhill.

That is, the regenerative braking device 2 is used only during braking and deceleration without impairing the conventional feeling of running during inertial running.
Operates to minimize the consumption of the battery and to assist the braking device. Also, because of the simple structure,
The above effect can be obtained without cost. In addition, normally, the one-way clutch provided on the rear wheel side is
The structure attached to the pedal side shown by B in the figure is suitable.

(Second Embodiment) The second embodiment will be described with reference to FIGS. Figure 2 is an explanation of the volume, Figure 3
[Fig. 3] is an explanatory diagram illustrating a regenerative charge amount. In FIG.
A volume 4 as a device for detecting the amount of displacement of the brake lever 5 is arranged at the position of a fulcrum, and the operating angle is represented by Θ. The regenerative braking device 2 adjusts the regenerative power generation time according to the operating angle Θ. The operating angle Θa of the volume 4 shows the case where there is no braking force by the brake lever 5, the operating angle Θb of the volume 4 shows the case where the braking force is small, and the operating angle Θc of the volume 4 shows the case where the braking force is large. Is shown. Θa <Θb <Θc.

3 (a), (b), and (c), the regenerative power generation time is also t1, t according to the size of the operating angle Θ of the volume 4.
2 and t3. As is clear from the figure, the regenerative power generation time is proportional to the power generation amount. The change in the regenerative power generation time continuously changes without steps to stabilize the running of the bicycle. Thereby, the regenerative braking device 2
The impact that is expected to occur due to the operation of the is eliminated, and more efficient regenerative charging can be performed.
That is, by continuously changing from gentle regenerative braking to maximum regenerative braking, regenerative charging can be performed effectively and efficiently as an auxiliary to the main braking device.

(Third Embodiment) A third embodiment will be described with reference to FIG. FIG. 4 is an explanatory diagram for explaining the operation of the strain gauge. In (a), a strain gauge A7 as a brake wire tension detecting device is arranged between the brake lever 5 and the brake shoe 6, that is, in the wire, and the regenerative power generation time is determined by the strain amount according to the tension.

In (b), a strain gauge B8 is arranged at a position around the brake where the most strain is considered to occur during braking, and the regenerative power generation time is determined by the detected strain amount. The relationship between the amount of strain and the regenerative power generation time is the same as in FIG. 3 already described. That is, regenerative charging can be performed by efficiently controlling the electric energy generated during braking or deceleration. The other functions and effects are the same as those in the second embodiment, and thus the description thereof is omitted.

FIG. 5 is a block diagram illustrating a regenerative braking device of the present invention. In FIG. 5, 2 is a volume 4
Of the regenerative braking device 10 for adjusting the regenerative power generation time according to the operating angle Θ of the LE. LE for displaying the signal from the regenerative braking device 2.
A display device such as D can inform the bicycle driver of the regenerative state, 11 is a motor provided in the electric auxiliary power unit, 12 is a battery provided in the electric auxiliary power unit, and 13 is a rear It is a ring.

When the bicycle driver wants a stronger regenerative effect while the regenerative braking device 2 is constantly operating, the number of rotations of the motor 11 is increased by shifting the gear to a higher ratio. A larger amount of regenerative energy is generated than before gear shifting, and a stronger braking effect can be obtained by generating more regenerative energy.

[0020]

As described above, in the electrically assisted power bicycle according to the present invention, the regenerative braking device for braking the bicycle by operating the motor provided in the electrically assisted power device as a generator, and the switch attached to the brake lever, By providing a regenerative braking control device consisting of a volume that detects the amount of displacement of the brake lever attached to the brake lever, or a combination of strain gauges that detects the amount of strain attached at the position where distortion occurs during braking, In addition, the power of the battery can be efficiently used to minimize the consumption and assist the braking device of the bicycle.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a volume used in a second embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a regenerative charge amount according to second to fourth embodiments of the present invention.

FIG. 4 is an explanatory diagram illustrating an operation of the strain gauge according to the third embodiment of the present invention.

FIG. 5 is a block diagram illustrating a regenerative braking device of the present invention.

[Explanation of symbols]

 1 Bicycle 2 Regenerative braking device 3 Switch 4 Volume 5 Brake lever 6 Brake shoe 7 Strain gauge A 8 Strain gauge B 10 Indicator 11 Motor 12 Battery 13 Rear wheel

Claims (3)

[Claims] 1. An electrically assisted power bicycle having an electrically assisted power unit composed of a battery and a motor, comprising: a regenerative braking means for operating the motor as a generator to charge the battery and braking the drive transmission system of the bicycle. And a regenerative control unit attached to the brake lever of the bicycle to control the operation of the regenerative braking unit. 2. The regenerative control means includes a volume for detecting a displacement amount of a brake lever, and a battery is charged with an amount of power generation corresponding to the displacement amount of the brake lever, so that braking according to the displacement amount drives the bicycle. The electric assisted power bicycle according to claim 1, wherein the bicycle is added to a transmission system. 3. An electrically assisted power bicycle having an electrically assisted power device including a battery and a motor, wherein the motor is operated as a generator to charge the battery and regenerative braking means for braking the drive transmission system of the bicycle. , A strain gauge that is installed at a position where distortion occurs during braking in the bicycle brake system and detects the amount of strain, and regenerative braking means that charges the battery with the amount of power generation according to the amount of strain detected by the strain gauge. An electric auxiliary power-assisted bicycle, comprising: a regeneration control unit for controlling.