KR101815735B1

KR101815735B1 - Electrical bicycle

Info

Publication number: KR101815735B1
Application number: KR1020150078878A
Authority: KR
Inventors: 한명환
Original assignee: 한명환
Priority date: 2015-06-03
Filing date: 2015-06-03
Publication date: 2018-01-30
Also published as: KR20160142740A

Abstract

The present invention relates to an electric bicycle. An electric bicycle according to the present invention includes a solar cell that generates electric energy using solar light, a battery that stores electric energy output by the solar cell, an electric motor that is driven by a power source supplied from the battery, A pedal assembly, a gear box part that receives a driving force through a belt connected to the electric motor and rotates a pedal shaft connected to the pedal, rotates the pedal shaft while changing a gear ratio according to a load state, and a control part that controls driving of the electric motor . According to the present invention, it is possible to drive an electric bicycle using solar electric power. When a load is applied, the gear ratio is automatically changed to a lower gear ratio. When the load state is lost, the gear ratio is automatically changed to an upper gear ratio, .

Description

Electrical bicycle

The present invention relates to an electric bicycle, and more particularly, to an electric bicycle capable of automatically changing a gear ratio according to a load state.

Generally, an electric bicycle is a bicycle with an electric motor and a rechargeable battery in a general bicycle frame, and when the pedal is treaded, the electric motor is operated to lower the strength when climbing a hill. These electric bicycles are the next-generation one-way transportation system that is regarded as having eco-friendliness and convenience. It is attracting attention as an eco-friendly means of transportation as well as an increase in the number of households around the world.

According to the World Electric Bicycle Report (EBRW), electric bicycles sell more than 36 million units annually in the world. In particular, China and Europe North America account for more than 95% of the total market, leading the market. Electric bicycles are expected to grow rapidly as ICT convergence type transportation vehicles. Electronic and chemical companies are showing interest in the electric bicycle market, which is likely to grow in the future, in order to preempt the automobile industry, batteries and electronic control devices.

Generally, electric bicycles can run up to 20km ~ 60km at a speed of 20km ~ 30km per charging time, and prices are gradually lowered due to new technology development and production increase.

However, the distribution of electric bicycles is still insignificant in Korea due to cultural factors and legal regulatory issues. Electric bicycles are more likely to be used for leisure than for transportation.

Therefore, in order to speed up popularization by recognizing an electric bicycle as an environment-friendly transportation device for leisure, it is necessary to increase the efficiency and extend the travel distance by one charge, You need to consider an electric bicycle that can charge an additional battery.

Accordingly, it is an object of the present invention to provide a battery bicycle which can be additionally charged using solar light, and which improves the battery usage efficiency by automatically changing the gear ratio according to the load state.

According to an aspect of the present invention, there is provided an electric bicycle comprising: a solar cell that generates electric energy using solar light; a battery that stores electric energy output from the solar cell; A gear box part for rotating the pedal shaft connected to the pedal through a belt connected to the electric motor and rotating the pedal shaft while changing the gear ratio according to a load state, And a control unit for controlling driving of the electric motor.

And a charging unit that generates electric energy according to driving of the pedal assembly and outputs the electric energy to the battery.

The gear box portion may include a plurality of gears arranged so that the gear ratios sequentially change and a gear ratio lower than the current level when the load is applied, And a gear level changing unit for connecting any one of the gears of the gears.

According to the present invention, a battery for driving an electric motor can be charged by using a solar battery. When the load is applied, the gear box portion is changed to a gear ratio lower than the current level. Can be changed automatically. Accordingly, the electric bicycle can be operated in an optimal state, and the battery consumption can be minimized, so that the possible distance traveled by one charge can be extended, and the number of battery charging times can be minimized.

1 is a block diagram for explaining a configuration of an electric bicycle according to an embodiment of the present invention,
FIG. 2 through FIG. 4 are views showing an example of the configuration of the driving unit of FIG. 1, and FIG.
5 to 8 are diagrams referred to in explanation of the gear level changing portion.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a block diagram of an electric bicycle according to an embodiment of the present invention.

1, the electric bicycle 100 includes a solar cell 110, a battery 120, a driving unit 130, a pedal assembly 160, a charging unit 170, (180), and a control unit (190). The driving unit 130 may include an electric motor 140 and a gear box unit 150. When such components are implemented in a practical application, two or more components may be combined into one component as needed, or one component may be divided into two or more components.

The solar cell 110 generates electric energy using sunlight.

The battery 120 stores electric energy output from the solar cell 110 and the charger 170, and supplies power to the driving unit 130.

The driving unit 130 includes an electric motor 140 and a gear box unit 150 and drives the pedal assembly 160 to run the electric bicycle 100. At this time, the gear box part 150 automatically changes the gear ratio according to the load condition.

The pedal assembly 160 is provided with a pedal (not shown), and the pedal shaft connected to the pedal by the driving unit 130 is rotated to drive the electric bicycle 100. In addition, the user may rotate the pedal to drive the electric bicycle 100,

The charging unit 170 generates electric energy according to the running of the electric bicycle 100 and outputs the electric energy to the battery 120. [

The sensor unit 180 senses the speed of the electric bicycle 100, the number of revolutions of the wheel, the inclination, and the like, and transmits the sensed result to the controller 190

The control unit 190 typically controls the operation of each module to control the overall operation of the electric bicycle 100.

The driving speed of the electric bicycle 100 can be adjusted according to the control of the control unit 190 by driving the pedal shaft installed in the pedal assembly 160 by the driving unit 130. [ In addition, when the electric bicycle 100 is driven, the gear ratio of the gear box part 150 varies according to the load state, and the electric bicycle 100 can be driven in an optimal state.

2 to 4 show an example of the configuration of the driving unit

2 to 4, the driving unit 130 may include an electric motor 140 and a gear box unit 150. [ The electric motor 140 is driven by the electric power supplied from the battery 120. The driving force of the electric motor 140 is transmitted to the gear box portion 150 through the belt 145 and the gear box portion 150 rotates the pedal assembly 160 to which the pedal is connected.

3 and 4, the gear box portion 150 includes a plurality of gears G1 to Gn so that a gear ratio of several tens can be set. The gear box part 150 uses one of a plurality of gears G1 to Gn while moving back and forth depending on a load state. When the load is applied, such as when climbing a slope or other sloping road, Level gear ratio and automatically changes to a gear ratio higher than the current level when the vehicle is no-load, such as when driving on a flat or downhill road.

5 to 8 are diagrams referred to in explanation of the gear level changing portion.

The gear level changing portions 151, 153, and 155 are provided for each of the plurality of gears G1 to Gn, respectively, and show portions corresponding to one gear G1 in FIG. 5 and FIG. The gear level changing units 151, 153, and 155 automatically change the gear ratio to a lower level than the current level when a load is applied, and when the load level becomes unloaded, such as when running on a flat surface or a downhill road, So that it can be changed automatically.

That is, the gear level changing units 151, 153, and 155 can change the gear ratio to a gear ratio lower than the current level when the rotation of the currently used gear is stopped under the load.

In Figs. 7 and 8, the portions denoted by reference numerals 158 and 159 denote parts that allow the gear to be automatically changed when the gear is rotated and under load. That is, the portion denoted by reference numeral 158 functions as a stop device when the load is applied and functions to change the gear to an upper-level gear ratio when entering a no-load state, and a portion denoted by reference numeral 159 And a function of changing the gear ratio to a lower level when a load is applied.

With this configuration, the gear ratio can be automatically changed according to the load condition, and the efficiency can be optimized. In addition, the gear ratio can be automatically changed according to the load state by using another structure.

It should be noted that the configuration and the method of the embodiments described above are not limitedly applied to the electric bicycle according to the present invention, but the embodiments may be modified such that all or some of the embodiments are selectively And may be configured in combination.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

110: Solar cell 120: Battery
130: driving part 140: electric motor
150: gear portion 160: second indicator portion
170: Charging unit 180: Sensor unit
190:

Claims

A solar cell that generates electric energy using solar light;
A battery for storing electrical energy output by the solar cell;
An electric motor driven by a power source supplied from the battery;
A pedal assembly to which the pedal is installed;
A charging unit for generating electric energy according to driving of the pedal assembly and outputting the electric energy to the battery;
A control unit for controlling driving of the electric motor;
A sensor unit for sensing at least one of a speed, a number of revolutions, and an inclination of the electric bicycle and transmitting the sensed result to the control unit; And
A pedal shaft connected to the pedal is rotated by receiving a driving force through a belt connected to the electric motor,
A plurality of gears arranged adjacent to each other on the same axis so that the gear ratio sequentially changes,
And a second gear disposed adjacent to the first gear is used to stop the rotation of the first gear currently in use among the plurality of gears when the load is applied, And a gear level changing unit for changing the gear ratio to a gear ratio higher than the current level by making the upper gear adjacent to the second gear currently in use to be usable when no load is applied,
And a gear box portion that rotates the pedal shaft while automatically changing a gear ratio by allowing any one of the plurality of gears to be used while moving back and forth along the axial direction according to a load state.

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