PERSONAL, GREEN-ENERGY, TRANSPORTATION DEVICE WITH SINGLE WHEEL AND SELF-BALANCING FUNCTION

Abstract

The present invention relates to a personal, green-energy, transportation device with single wheel and self-balancing function. The personal, green-energy, transportation device can be propelled by the manpower and simultaneously execute the self-balancing function thereof. The device comprises: a body, a wheel, a pedal portion, a roller chain, an in-wheel motor, and a sensing-control module, wherein the sensing-control module detects the balancing condition of the body when the personal, green-energy, transportation device is driven, and then the sensing-control module controls the in-wheel motor to output a balancing torque for maintaining the self balance of the body.

Description

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a personal transportation device with a single wheel, and more particularly, to a personal, green-energy, transportation device with a single wheel and a self-balancing function, in which when a driver moves the center of gravity thereof or provides a pedaling power to the personal transportation device, a sensing-control module detects the balancing change of the personal transportation device and an in-wheel motor outputs a balancing torque which can maintain the self-balance of the personal transportation device and assist the driver to move the device forward or backward.

2. Description of Related Art

The prototype of a bicycle is first appeared in the manuscript written by Leonardo da Vinci, however, the entity of the bicycle is manufactured in the end of the eighteenth century. After near one hundred year's evolution, modern form of the bicycle is born in 1874. A British engineer named Roson designs and build a bicycle with a roller chain and sprockets. In 1886, Another British named John. K. Stahly designs a new style bicycle fitted with a fork and brakes. The sizes of the front and the rear wheel of the new style bicycle are the same in order to maintain balance, moreover, rubber wheels are firstly adopted in the new style bicycle of Stahly, such that, Stahly is later known as the “father of a bike”. In 1888, Ireland's veterinary Dunlop, who mounts an inflatable rubber into the bicycle wheels such that the bicycle wheels become inflatable, which makes the bicycle more complete.

In the early years, bicycles are treated as a main personal transportation device. However, with industrialization and the advancement of science and technology, medium-size and heavy vehicles begin to use the internal combustion engine to generate power. Internal combustion engines are also used widely to propel personal transportation devices such as motorcycles. In recent years, there are many countries aware of the environmental protection, so that the medium-size and heavy vehicles with the internal combustion engines cause major environment pollutions are often criticized by environmental groups. As a result, light-weight electric transportation devices capable of saving energy and protecting environment are researched, developed and manufactured under the advocacy of public policies and the sponsorship of government projects.

One of the personal light-weight electric transportation devices is firstly proposed by an American inventor Dean Kamen. Mimicking the sensory organs of balance and the feet of a man, Dean Kamen adopts a high-precision solid-state gyroscope and servomotors in the device, and in addition, Dean Kamen utilizes a microprocessor as the central control unit. The device possesses self-balancing function and is sold under the name “Segway”. In Segway, the high-precision solid-state gyroscope is the sensor to detect the balancing change of the device and to output a signal to the micro-processor. Then, after processing the signal, the micro-processor controls the servomotor such that the dynamic balance of the whole device is maintained.

After Segway is proposed, a variety of light electric transportation devices with the self-balancing function, including “Enicycle” and “U3-X”, have been proposed. Compared to vehicles using internal combustion engines, Segway, Enicycle and U3-X are more beneficial to the environment. However, since the power of Segway, Enicycle and U3-X comes solely from electricity, the driver's manpower can not be input to these devices to be the main driving force for saving energy sake. For this reason, Segway, Enicycle and U3-X can not be treated as true green-energy transportation devices.

In view of the fact that the light-weight electric transportation devices still have rooms for improvement from the green-energy aspect, the inventors of the present application have made great efforts to make innovative research and eventually conceived a personal, green-energy, transportation device with single wheel and self-balancing function.

BRIEF SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a personal, green-energy, transportation device with a single wheel and a self-balancing function, in which the manpower can be adopted as a driving force and an electric in-wheel motor is used for executing the self-balancing function, moreover, a sensing-control module detects the balancing change of the personal transportation device, and then outputs a control signal to an in-wheel motor to maintain the self-balance of the personal transportation device.

Accordingly, to achieve the abovementioned objective, the inventors propose a personal, green-energy, transportation device with a single wheel and a self-balancing function, which comprises: a body, a wheel, a pedal portion, a roller chain, an in-wheel motor, and a sensing-control module, wherein the body comprises: a body, which comprises: a main shaft portion, having a main shaft first end and a main shaft second end, wherein a handle is attached to the main shaft first end, and a first sprocket wheel is disposed between the main shaft first end and the main shaft second end; at least one extension shaft portion, having a extension shaft first end and an extension shaft second end, in which the extension shaft first end is connected to the main shaft portion; and a supporting portion, having at least one supporting bar and a supporting base, wherein one end of the supporting bar is connected to the supporting base for supporting the supporting base;

a wheel, connected to the extension shaft second end through an center axle thereof and having a second sprocket wheel, wherein the wheel can be driven by a driving force via the second sprocket wheel;

a pedal portion, having two pedals and two axles, in which one end of the axle is connected to the pedal, and the another end of the axle is connected to the first sprocket wheel;

a roller chain, connecting the first sprocket wheel and the second sprocket wheel, wherein when applying the driving force to the pedal portion to rotate the first sprocket wheel, the roller chain transmits a mechanical power to the second sprocket wheel and consequently makes the wheel to rotate;

an in-wheel motor, disposed on the wheel and outputting a balancing torque to maintain the self balance of the body; and

a sensing-control module, disposed on the supporting base, wherein the sensing-control module is able to sense the balancing condition of the body, and to control the in-wheel motor for keeping the self balance of the body, and the sensing-control module comprises: an inertia-sensing unit, having an inclinometer and a gyroscope, wherein the inclinometer is adopted for detecting a tilt of the body and outputs a tilt signal, and the gyroscope is used for detecting an angular velocity of the body and outputting an angular velocity signal; a control unit, electrically connected to the inertia-sensing unit for receiving the tilt signal and the angular velocity signal, and outputting a control signal after processing the tilt signal and the angular velocity signal; and

a motor-driving unit, electrically connected to the control unit for receiving the control signal, and, according to the control signal, controlling the in-wheel motor to output the balance torque for maintaining the self balance of the body.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The invention as well as a preferred mode of use and advantages thereof will be best understood by referring to the following detailed description of an illustrative embodiment in conjunction with the accompanying drawings, wherein:

FIG. 1 is a framework diagram of a personal, green-energy, transportation device with single wheel and self-balancing function according to the present invention;

FIG. 2 is an operation schematic diagram of the personal, green-energy, transportation device with single wheel and self-balancing function according to the present invention;

FIG. 3 is the framework diagram of a sensing control unit of the personal, green-energy, transportation device with single wheel and self-balancing function according to the present invention;

FIG. 4 is the framework diagram of the personal, green-energy, transportation device installed with two auxiliary mechanisms according to the present invention; and

FIG. 5 is the operation schematic diagram of using the auxiliary mechanisms to turn the personal, green-energy, transportation device.

DETAILED DESCRIPTION OF THE INVENTION

To more clearly describe a personal, green-energy, transportation device with single wheel and self-balancing function according to the present invention, embodiments of the present invention will be described in detail with reference to the attached drawings hereinafter.

With reference to FIG. 1, which illustrates a framework diagram of a personal, green-energy, transportation device with single wheel and self-balancing function according to the present invention, the personal, green-energy, transportation device 1 with single wheel and self-balancing function includes: a body 11, a wheel 13, a pedal portion 14, a roller chain 15, an in-wheel motor 17, a sensing-control module 18, and a seat cushion 1A, wherein the body 11 includes: a main shaft portion 111, having a main shaft first end 1111 and a main shaft second end 1112 that a handle 1113 is attached to the main shaft first end 1111, and a first sprocket wheel 1114 is disposed between the main shaft first end 1111 and the main shaft second end 1112; two extension shaft portions 112, wherein each of the extension shaft portions 112 have an extension shaft first end 1121 and an extension shaft second end 1122 that the two extension shaft first ends 1121 are connected to the main shaft portion 111; and a supporting portion 116, which has two supporting bars 1161 and a supporting base 1162, wherein one end of the supporting bar 1161 is connected to the supporting base 1162 for supporting the supporting base 1162. In addition, the body 11 further includes a supporting member 1115, which is disposed on the main shaft second end 1112 and able to prevent the personal, green-energy, transportation device 1 from falling when the power is off.

Referring to FIG. 1 again, the wheel 13 is connected to the extension shaft second end 1122 through a center axle thereof and has a second sprocket wheel 1311. The wheel 13 can be driven by a driving force via the second sprocket wheel 1311, wherein the driving force is generated by a driver. The pedal portion 14 has two pedals 141 and two axles 142. One end of the axle 142 is connected to the pedal 141, and the another end of the axle 142 is connected to the first sprocket wheel 1114. The roller chain 15 is disposed on the first sprocket wheel 1114 and the second sprocket wheel 1311. When a driver pedals the two pedals 141, a mechanical force is used as the driving force and applied to the whole pedal portion 14 and in the way that the first sprocket wheel 1114 is rotated and the roller chain 15 drives the second sprocket wheel 1311 to rotate so as to transfer the driving force to the wheel 13. The in-wheel motor 17 is disposed on the central part of wheel 13, wherein the in-wheel motor 17 can output a balancing torque to maintain the self balance of the body 11 when the personal, green-energy, transportation device 1 is driven.

The sensing-control module 18 is disposed on the supporting base 1162, wherein the sensing-control module 18 is able to sense the balancing condition of the body 11, and to control the in-wheel motor 17 to keep the self balance of the body 11. The sensing-control module 18 includes: an inertia-sensing unit 181, having an inclinometer 1811 and a gyroscope 1812, wherein the inclinometer 1811 is adopted for detecting the tilt of the body 11 and outputs a tilt signal, and the gyroscope 1812 is used for detecting the angular velocity of the body 11 and outputs an angular velocity signal; a control unit 182, which is electrically connected to the inertia-sensing unit 181 for receiving the tilt signal and the angular velocity signal, and outputting a control signal after processing the tilt signal and the angular velocity signal; and a motor-driving unit 183, which is electrically connected to the control unit 182 for receiving the control signal, and controlling the in-wheel motor 17 to output the balancing torque for maintaining the self balance of the body 11 according to the control signal. Moreover, the sensing-control module 18 further includes a power supply unit 184, which is electrically connected to the inertia-sensing unit 181, control unit 182, motor-driving unit 183, and the in-wheel motor 17 for supplying the electricity. When the personal, green-energy, transportation device 1 is driven downhill, or the personal, green-energy, transportation device 1 is driven at high speed, the extra driving force, i.e., the mechanical power, can be transformed into an electrical power by the motor-driving unit 183 and the control unit 182, and the electrical power is stored in the power supply unit 184.

Please refer to FIG. 2, which illustrates an operation schematic diagram of the personal, green-energy, transportation device. As shown in FIG. 2, when a driver 2 drives the personal, green-energy, transportation device 1 of the present invention, the driver 2 sits on the seat cushion 1A, and the hands of the driver 2 hold the handle 1113 for controlling the body 11. The feet of the driver 2 are placed on the two pedals, respectively. The driver drives the device by pushing the two pedals to rotate the first sprocket wheel 1114 and the second sprocket wheel 1311. By doing so, the wheel 13 is rotated which makes the personal, green-energy, transportation device 1 to move by manpower.

Referring to FIG. 2 again, and simultaneously referring to FIG. 3, which illustrates the framework diagram of the sensing-control unit of the personal, green-energy, transportation device according to the present invention, when the driver 2 drives the personal, green-energy, transportation device 1 by the manpower, the sensing-control unit 18 detects the balancing condition of the body 11. As shown in FIG. 3, in the sensing-control unit 18, the inclinometer 1811 detects the tilt of the body 11 and the gyroscope 1812 detects the angular velocity of the body 11. When the driver 2 operates the personal, green-energy, transportation device 1 to move forward and backward, the inclinometer 1811 and the gyroscope 1812 send the tilt signal and the angular velocity signal to the control unit 182, respectively; then, the control unit 182 processes the tilt signal and the angular velocity signal and outputs the control signal to the motor-driving unit 183. According to the control signal, the motor-driving unit 183 controls the in-wheel motor 17 to output a balancing torque for keeping the self balance of the body 11.

Referring to FIG. 4 and FIG. 5, which respectively illustrate the framework diagram of the personal, green-energy, transportation device installed with two auxiliary mechanisms, and the operation schematic diagram of using the auxiliary mechanisms to turn the personal, green-energy, transportation device. As shown in FIG. 4 and FIG. 5, two auxiliary mechanisms 19 are disposed on two sides of the wheel 13, respectively. Each of the auxiliary mechanisms 19 include: an auxiliary wheel 191, an auxiliary axle 192 and a shock-absorbing member 193, wherein one end of the auxiliary axle 192 is connected to the extension shaft second end 1122, and the another end of the auxiliary axle 192 is connected to the auxiliary wheel 191, and the shock-absorbing member 193 is disposed on the auxiliary axle 192. As shown in FIG. 5, the driver 2 (the driver 2 is not shown in FIG. 5) is able to turn the personal, green-energy, transportation device when the driver applies a mechanical brake on one auxiliary wheel 191, or shifts the center of gravity thereof to produce velocity deference between two opposite auxiliary wheels 191, such that the personal, green-energy, transportation device 1 may be turned around by a small radius of rotation.

Thus, the personal, green-energy, transportation device with the single wheel and the self-balancing function according to the present invention has been disclosed completely and clearly in the above description. In summary, the present invention has the following advantages:

• • 1. Through the sensing-control module and the in-wheel motor, it is able to keep the self-balance of the personal, green-energy, transportation device and make the device to move forward or backward.
  • 2. Using the two auxiliary mechanisms, the driver can turn the personal, green-energy, transportation device by applying the mechanical brake or laterally change the center of gravity thereof
  • 3. When the individual green-energy carrying device is driven downhill, or is driven at high speed, the extra driving force, i.e., the mechanical power, can be transformed into the electrical power by the motor-driving unit and the control unit, and the electrical power is stored in the power supply unit.
  • 4. The supporting member can hold the personal, green-energy, transportation device statically when the power of the personal, green-energy, transportation device is off; moreover, when the personal, green-energy, transportation device is held statically and the wheel is lifted off the ground, it can be used as an exercise bike. When the driver operates the exercise bike, the driver's manpower is transformed to the electrical power by the motor-driving unit and the control unit, and then the electrical power is also stored in the power supply unit; meanwhile, the sensing-control unit changes the mechanical resistance felt by the driver.

The above description is made on embodiments of the present invention. However, the embodiments are not intended to limit scope of the present invention, and all equivalent implementations or alterations within the spirit of the present invention still fall within the scope of the present invention.

Claims

1. A personal, green-energy, transportation device with single wheel and self-balancing function, comprising: a body, comprising: a main shaft portion, having a main shaft first end and a main shaft second end, wherein a handle is attached to the main shaft first end, and a first sprocket wheel being disposed between the main shaft first end and the main shaft second end;at least one extension shaft portion, having an extension shaft first end and an extension shaft second end, wherein the extension shaft first end is connected to the main shaft portion; anda supporting portion, having at least one supporting bar and a supporting base, wherein one end of the supporting bar is connected to the supporting base for supporting the supporting base;a wheel, being connected to the extension shaft second end through an center axle thereof and having a second sprocket wheel, wherein the wheel can be driven by a driving force via the second sprocket wheel;a pedal portion, having two pedals and two axles, wherein one end of the axle is connected to the pedal, and the another end of the axle is connected to the first sprocket wheel;a roller chain, connecting the first sprocket wheel and the second sprocket wheel, wherein when applying the driving force to the pedal portion to rotate the first sprocket wheel, the roller chain transmitting a mechanical power to the second sprocket wheel and consequently making the wheel to rotate;an in-wheel motor, being disposed on the wheel and outputting a balancing torque to maintain the self balance of the body; anda sensing-control module, being disposed on the supporting base, wherein the sensing-control module is able to sense the balancing condition of the body and control the in-wheel motor to keep the self balance of the body, and comprises: an inertia-sensing unit, having an inclinometer and a gyroscope, wherein the inclinometer is adopted for detecting the tilt of the body and outputs a tilt signal, the gyroscope being used for detecting the angular velocity of the body and outputting an angular velocity signal;a control unit, being electrically connected to the inertia-sensing unit for receiving the tilt signal and the angular velocity signal, and outputting a control signal after processing the tilt signal and the angular velocity signal; anda motor-driving unit, being electrically connected to the control unit for receiving the control signal, and according to the control signal, controlling the in-wheel motor to output the balance torque for maintaining the self balance of the body.

2. The personal, green-energy, transportation device of claim 1, further comprising: two auxiliary mechanisms, with each of the auxiliary mechanisms having an auxiliary wheel, an auxiliary axle and a shock-absorbing member that one end of the auxiliary axle being connected to the extension shaft second end, the other end of the auxiliary axle being connected to the auxiliary wheel, and the shock-absorbing member being disposed on the auxiliary axle; anda seat cushion, being disposed on the supporting base and adopted for seating.

3. The personal, green-energy, transportation device of claim 1, wherein the body further comprises a support member, being attached to the main shaft second end and being able to hold the personal, green-energy, transportation device statically when the power is off.

4. The personal, green-energy, transportation device of claim 1, wherein the sensing control module further comprises a power supply unit electrically connected to the inertia-sensing unit, control unit, motor-driving unit, and the in-wheel motor for supplying the electricity.

5. The personal, green-energy, transportation device of claim 4, wherein the driver can drive the device in three modes: The first mode is purely electric mode in which the driver moves the center gravity thereof forward or backward and the self-balancing function of the transportation device automatically drives the transportation device forward or backward accordingly. The second mode is the hybrid mode in which the driver can pedal the transportation device so that the manpower can assist the in-wheel motor to move the device forward, and the amount of assistance depends on the posture of the driver. The third mode is the excise mode, in which when the transportation device is held statically and the wheel is lifted off the ground, the pedaling power of the driver is transformed to an electrical power by the motor-driving unit and the control unit, and then the electrical power is also stored in the power supply unit, meanwhile the control circuit can change the mechanical resistance felt by the driver.

6. The personal, green-energy, transportation device of claim 2, wherein a driver is able to turn the personal, green-energy, transportation device through the auxiliary wheel, the auxiliary axle and the shock-absorbing member if the driver laterally changes the center of gravity thereof.