KR101214112B1 - Continuously variable transmission of bicycle with regenerative braking - Google Patents

Abstract

The present invention relates to a continuously variable transmission of a bicycle having a regenerative means, the first gear unit to which the rotational force of the pedal of the bicycle is transmitted, the hydraulic pressure generating unit to generate the hydraulic pressure by the rotational force of the pedal, and opening and closing the oil passage Hydraulic braking unit, a hydraulic driving unit for generating a driving force by the hydraulic pressure generated in the hydraulic generating unit, a second gear unit for converting the driving force generated in the hydraulic driving unit and supplied to the rear wheel of the bicycle, and during braking of the hydraulic braking unit Regeneration means for reusing the remaining drive force is characterized in that it comprises. Therefore, the present invention provides a regenerative means to the continuously variable transmission of the bicycle, to recover the drive energy remaining during the deceleration of the bicycle or the downhill of the bicycle as electrical energy to the electric motor generator for the acceleration of the bicycle or climbing the ramp. Providing energy to generate a driving force in the second gear portion provides an effect of improving the operating efficiency of the continuously variable transmission.

Description

Continuously variable transmission of bicycle with regenerative braking

The present invention relates to a continuously variable transmission of a bicycle having regenerative means, and more particularly, to a continuously variable transmission of a bicycle having regenerative means for transmitting the rolling force of the bicycle pedal to the rear wheel of the bicycle through a fluid.

Normally, a bicycle is configured to transmit power by installing a sprocket having a different size on a rotation shaft of a pedal and a rear wheel, respectively, and a bicycle of this structure rotates a sprocket installed on a shaft of a pedal when the user rotates the pedal by foot. And the chain again rotates the sprocket installed on the rear axle so that the rear wheel is rotated to drive the bicycle. At this time, by changing the diameter size of the sprockets installed on both sides, the driving speed of the bicycle is given a change in various driving speeds such as high speed, medium speed and low speed.

However, such a conventional bicycle has power loss due to the friction of the chain consisting of several nodes and friction between the chain and the sprocket, it is difficult to drive the bike, especially when carrying loads and climbing uphill.

In addition, there is a disadvantage in that noise occurs while driving the bicycle due to friction between the chain and the sprocket, or the chain and the sprocket are worn down, which shortens the life of the bicycle.The failure of the chain is loosened or extended due to wear of the chain and the sprocket frequently occurs do.

In particular, since chains and sprockets are completely exposed to rain and moisture, the oxidation corrosion is faster, resulting in a shorter life span. Therefore, there is an inconvenience to supply the lubricant frequently. In addition, such a lubricant is attached to the leg or pants of the user has a problem of providing contamination.

In recent years, the use of hydraulic systems, which play a key role in the modern industry, ranging from heavy machinery to precision processing machines, has been continuously examined for the technology applied to bicycle transmissions. Therefore, there has been an attempt to replace the transmission of a conventional bicycle using a chain with a hydraulic transmission having higher durability while continuously changing the speed stage.

In particular, the bicycle has been used as a power transmission device in a conventional bicycle, but the environment in which the bicycle is used is composed of sand, road salt, and materials that cause friction or corrosion in contact with the chain at all times. These materials include sprockets and transmissions. In addition to causing catastrophic mechanical wear on the chain itself, there was also the problem of the chain coming off the sprocket.

On the other hand, a bicycle with a hydraulic continuously variable transmission is located entirely in a space where parts are enclosed, so that mechanical parts are separated from unwanted external contaminants. By using hydraulic pressure, power is transmitted through a narrow pipe line. This pipe is located in the bicycle frame and will always transmit power without interruption of power transmission.

In particular, the hydraulic continuously variable transmission solves the above problems because the hydraulic pipe can be disposed in any direction or position. It can be seen that a bicycle having a hydraulic continuously variable transmission has considerable advantages over conventional bicycles.

However, most studies on bicycles using hydraulic continuously variable transmissions from literature have shown that the operating efficiency is less than 80% [M.T. Socks, Design of a High-Efficiency Hydrostatic Bicycle Transmission, Thesis (S.B.), 2006].

On the other hand, it can be seen that the conventional chain-driven bicycle has an efficiency of more than 90% [Human Power, Technical Journal of the IHPVA, Number 52, 2001, Human Power, Technical Journal of the IHPVA, Number 55, 2003-2004 ].

The reduction of the operation efficiency of the hydraulic continuously variable transmission is caused by the loss of energy in the hydraulic valve, etc. by using various hydraulic components in the hydraulic continuously variable transmission. Therefore, there is a problem that the hydraulic continuously variable transmission is limited to the bicycle. .

The present invention has been made in order to solve the above-mentioned conventional problems, the second gear unit by providing the electrical energy to the drive motor generator generator by recovering the drive energy remaining during the deceleration of the bicycle or the descent of the ramp as electrical energy Generate driving force to improve the operating efficiency of the continuously variable transmission, improve the regenerative efficiency of the continuously variable transmission, improve the driving safety, improve the stability of the continuously variable transmission, improve the transmission efficiency, and improve the wear and corrosion of parts. It is an object of the present invention to provide a continuously variable transmission of a bicycle having a regenerative means for preventing it.

The present invention for achieving the above object, the first gear unit is connected to the pedal of the bicycle and the rotational force of the pedal is transmitted; A hydraulic pressure generating part installed downstream of the first gear part to generate hydraulic pressure by a rotational force of a pedal; A hydraulic brake installed downstream of the hydraulic generator to open and close the hydraulic flow path; A hydraulic driving unit installed downstream of the hydraulic braking unit to generate a driving force by the hydraulic pressure generated by the hydraulic generating unit; A second gear part installed downstream of the hydraulic drive part to convert a driving force generated in the hydraulic drive part to be supplied to the rear wheel of the bicycle; And regenerative means connected to the second gear part to reuse the driving force remaining during braking of the hydraulic brake part, wherein the regenerative means includes a driving motor combined generator connected to the second gear part, and the driving motor combined use. And a storage battery for storing electricity generated in the generator, wherein the combined driving motor generator generates a driving force in the second gear unit by electricity stored in the storage battery.

A first clutch is provided between the first gear portion and the hydraulic pressure generating portion of the present invention.

The hydraulic generating unit of the present invention, the hydraulic pump connected to the first gear unit, a check valve for controlling the hydraulic pressure generated by the hydraulic pump, a hydraulic tank for storing the hydraulic pressure generated by the hydraulic pump, the hydraulic pump It is provided with a pressure relief valve to control the excessive hydraulic pressure generated from.

The hydraulic brake of the present invention is composed of a hydraulic brake using a four-port two-position proportional control valve.

The hydraulic drive unit of the present invention is installed downstream of the hydraulic brake unit, the pressure relief valve for controlling excessive hydraulic pressure, the hydraulic motor operated by the hydraulic pressure supplied from the hydraulic brake unit, the torque generated from the hydraulic motor It is provided with a torque converter for converting.

The second gear unit of the present invention comprises a transmission gear having a drive gear and a driven gear, wherein the drive gear generator is connected to the drive gear via a third clutch, and the fourth gear is connected to the driven gear. The rear wheels of the bicycle are connected through each other.

As described above, in the present invention, by installing the regenerative means in the continuously variable transmission of the bicycle, the drive motor at the time of deceleration of the bicycle or when the descending of the ramp is recovered as electrical energy to drive the acceleration of the bicycle or climbing the ramp By providing electric energy to the combined generator to generate a driving force in the second gear portion provides an effect of improving the operating efficiency of the continuously variable transmission.

It is possible to improve the regenerative efficiency of the continuously variable transmission by installing a clutch between the first gear portion and the hydraulic generating portion, respectively, by operating the second gear portion by the regenerative means.

By using the proportional control valve in the hydraulic braking unit, the braking force of the continuously variable transmission can be improved, and a drum brake is additionally installed in the rear wheel to enable braking in the event of an abnormal hydraulic braking unit, thereby improving driving safety.

It is possible to use the residual oil by installing hydraulic pump and hydraulic tank in the oil generating part, and by installing hydraulic motor and torque converter in the hydraulic driving part to prevent excessive hydraulic operation by the hydraulic motor, thereby improving the stability of the continuously variable transmission. To minimize the size of the hydraulic generating part and the hydraulic driving part, the gear part is provided at the pedal part and the rear wheel part, respectively, and provides the effect of further improving the shifting efficiency.

A clutch is installed between the second gear portion and the regenerative means, and between the second gear portion and the rear wheel portion, respectively, to block power transmission to the rear wheel portion during braking by the hydraulic braking portion, and transmit power to the regenerative means, thereby regenerative efficiency of the continuously variable transmission. It will be possible to improve.

By applying the hydraulic system stored in the hydraulic system by applying the hydraulic system to the continuously variable transmission of the bicycle, the operation efficiency of the bicycle is increased, and the transmission efficiency is improved.

In addition, by transmitting the rolling force of the pedal to the rear wheel through the fluid, it is possible to reduce the frictional resistance to reduce the power loss, and the function of generating hydraulic pressure by the fluid, and lubricating each part evenly, so that the wear of the parts and It is effective in preventing corrosion.

In addition, by using the hydraulic continuously variable transmission, quiet operation is possible because no operation noise is generated, and greater torque can be obtained by hydraulic pressure. There is an effect that the bicycle is driven.

1 is a block diagram showing a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention.
2 is a circuit diagram showing an open circuit configuration of a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention.
Figure 3 is a circuit diagram showing a closed circuit configuration of a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention.
4 and 5 are graphs showing the characteristics of the continuously variable transmission of the bicycle having the regenerative means according to an embodiment of the present invention.
Figure 6 is a block diagram showing a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram showing a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention, Figure 2 is an open circuit configuration of a continuously variable transmission of a bicycle having a regenerative means according to an embodiment of the present invention 3 is a circuit diagram illustrating a closed circuit configuration of a continuously variable transmission of a bicycle having a regenerative means according to an exemplary embodiment of the present invention, and FIGS. 4 and 5 illustrate a regenerative means according to an exemplary embodiment of the present invention. Figure 6 is a graph showing the characteristics of the continuously variable transmission of the bicycle, Figure 6 is a block diagram showing a continuously variable transmission of the bicycle having a regenerative means according to an embodiment of the present invention.

As shown in Figs. 1 and 6, the continuously variable transmission of the bicycle of the present embodiment is the first gear portion 20, the hydraulic pressure generating portion 30, the hydraulic braking portion 40, the hydraulic driving portion 50, the second gear portion 60, the regenerative means 80 is to transmit the driving force of the pedal unit 10 of the bicycle to give the user a stepping force to the rear wheel portion (70).

The pedal unit 10 is installed at the central part of the bicycle to give the user a foot power using the foot, and consists of a pedal 11 and a rotation angle sensor 12. The pedal 11 is rotatably installed under the seat of the bicycle, and the rotation angle sensor 12 is coupled to the crankshaft of the pedal 11 to detect the angular velocity of the pedal 11.

The rotation angle sensor 12 is used to measure the speed of the pedal unit 10 by the user, is installed in the crank mechanism of the pedal unit 10, the feedback signal from the rotation angle sensor 12 is automatic shift control Used for

The first gear unit 20 is connected to the pedal 11 of the bicycle, the rotational force of the pedal 11 is transmitted, consists of a transmission gear having a drive gear 21 and the driven gear 22, the pedal of the bicycle ( A rotation angle sensor 12 is provided between 11) and the first gear portion 20.

The drive gear 21 is connected to the rotary shaft of the pedal 11 to transmit the rotational force of the pedal 11, the driven gear 22 is coupled to engage with the drive gear 21 to increase the rotational speed of the drive gear 21. It is connected to the hydraulic generator 30 is changed.

A first clutch 22a mounted on the driven gear 22 is installed between the first gear portion 20 and the hydraulic generating portion 30 to provide power between the first gear portion 20 and the hydraulic generating portion 30. The delivery will be interrupted.

The hydraulic pressure generating unit 30 is installed downstream of the first gear unit 20 to generate hydraulic pressure by the rotational force of the pedal 11, the hydraulic pump 31, the check valve 32, the hydraulic tank 33, It consists of a pressure relief valve 34, each connected by a hydraulic pipe. This hydraulic pipe is used to connect the hydraulic components of the continuously variable transmission and supply high pressure hydraulic pressure for the operation of the continuously variable transmission.

The hydraulic pump 31 is coupled via the driven gear 22 and the first clutch 22a of the first gear portion 20 to transmit and operate the rotational force of the pedal 11, and to the first clutch 22a. By this, the rotational force transmission of the pedal 11 is interrupted. As the hydraulic pump 31, it is preferable to use a variable bidirectional hydraulic pump in order to convert the power generated by the bicycle user into hydraulic pressure.

In addition, the volume of the hydraulic pump 31 is adjusted by controlling the swash plate angle of the hydraulic pump, the signal for angle control of the swash plate angle can be selected, such as the automatic control mode and the user manual operation mode in accordance with the control of the main valve. .

In the manual operation mode, the volume of the hydraulic pump 31 is continuously changed so that the user can obtain a comfortable condition. In this manual operation mode, the volume of the hydraulic pump 31 is controlled and maintained by a mechanical mechanism.

In the automatic control mode, the swash plate angle of the hydraulic pump 31 is adjusted so that the user is optimized for an operation state and a road condition according to the rotation speed of the crankshaft of the pedal 11 and the torque of the rotation shaft of the hydraulic pump 31.

The check valve 32 is connected to the output end of the hydraulic pump 31 to control the hydraulic pressure generated by the hydraulic pump 31. The hydraulic tank 33 is connected to the downstream of the check valve 32 to store the hydraulic pressure generated by the hydraulic pump 31, consists of a small hydraulic tank to supply the hydraulic pressure to the continuously variable transmission if necessary.

The pressure relief valve 34 is connected to the downstream of the hydraulic tank 33 to control the excessive hydraulic pressure generated by the hydraulic pump 31, which is used to limit the pressure of the hydraulic oil inside the continuously variable transmission to a predetermined value when the continuously variable transmission is driven. do.

The pressure relief valve 34 is set to a low operating pressure to prevent overload in situations such as sudden shock or automatic control mode malfunction, and the set pressure of the valve is manually set by the user by an adjustment screw. Can be adjusted.

The hydraulic braking unit 40 is composed of a hydraulic brake which is installed downstream of the hydraulic generating unit 30 and uses a four-port two-position proportional control valve that can control the opening and closing of the hydraulic pipe. The hydraulic generating unit 30 and the hydraulic driving unit By controlling the flow of hydraulic pressure between the 50 to give a brake force to the rear wheel portion 70 of the bicycle.

The hydraulic brake of the hydraulic brake unit 40 can be used by setting in an automatic control mode or a manual mode, and by using such a hydraulic brake, the brake is integrated to protect the brake system in a poor environment of the environment, the user or the driver Can generate a strong braking force without much effort as in a hand brake.

The proportional control valve of the hydraulic braking unit 40 is used to control the flow rate discharged from the hydraulic motor 51 in the braking process, and in the neutral position, the valve is kept open and both lines of the valve are connected.

The opening area of the proportional control valve is reduced in proportion to the control signal of the proportional solenoid. The control signal is determined by the control of the main control valve, and the maximum braking occurs when the valve is completely shut off.

In particular, instead of using such a hydraulic brake, the conventional drum brake 72 is additionally installed in the rear wheel portion 70 can be used for the convenience of the user so that it can be operated in an emergency.

The hydraulic driving unit 50 is installed downstream of the hydraulic braking unit 40 to generate a driving force by the hydraulic pressure generated in the hydraulic generating unit 30, the hydraulic motor 51, the pressure relief valve 52, the torque converter ( 53), each connected by hydraulic pipe. This hydraulic pipe is used to connect the hydraulic components of the continuously variable transmission and supply high pressure hydraulic pressure for the operation of the continuously variable transmission.

The hydraulic motor 51 is operated by the hydraulic pressure supplied from the hydraulic braking unit 40 to generate a rotational driving force. As the hydraulic motor 51, it is preferable to use a fixed-capacity bidirectional hydraulic motor to obtain a mechanical rotational force for driving the bicycle using hydraulic pressure.

The torque sensor is used to measure the output torque of the hydraulic drive unit 50 of the continuously variable transmission and is installed on the output shaft of the hydraulic motor 51, so that the feedback signal from the torque sensor is used for automatic shift control.

The pressure relief valve 52 is connected to the downstream of the hydraulic brake unit 40 to control the excessive hydraulic pressure of the hydraulic brake unit 40, and is used to limit the pressure of the hydraulic oil inside the continuously variable transmission to a predetermined value when the continuously variable transmission is driven. do. The pressure relief valve 52 is preferably set to the maximum pressure value in the continuously variable transmission to prevent the maximum pressure rise.

The torque converter 53 is connected to the output end of the hydraulic motor 51 to convert the torque generated from the hydraulic motor 51 to a predetermined value.

The second gear unit 60 is installed downstream of the hydraulic driving unit 50 to convert the rotational driving force generated in the hydraulic driving unit 50 to supply to the rear wheel unit 70 of the bicycle, the second gear unit 60 Is composed of a transmission gear having a drive gear 61 and a driven gear 62.

The drive gear 61 is connected to the rotary shaft of the hydraulic motor 51 to transmit the rotational driving force of the hydraulic motor 51, the driven gear 62 is coupled to engage the drive gear 61 is coupled to the drive gear 61 of the It is connected to the rear wheel part 70 while changing the rotation speed.

The drive gear 61 is connected to the regenerative means 80 via the third clutch 61a, and the driven gear 62 is connected to the rear wheel part 70 of the bicycle via the fourth clutch 62a. have.

Accordingly, the power transmission between the second gear portion 60 and the regenerative means 80 is interrupted by the third clutch 61a, and the rear wheels of the second gear portion 60 and the bicycle are driven by the fourth clutch 62a. Power transmission between the parts 70 is interrupted.

The first gear portion 20 and the second gear portion 60 of the present embodiment can be integrated into the continuously variable transmission, because the speed of the pedal portion 10 by the user is lower than the average, so that the pedal portion 10 It is necessary to use the first gear unit 20 when driving the hydraulic pump 31 from the crank shaft connected to the rotating shaft of the other hand, while the speed of the hydraulic motor 51 is high, but the speed of the rear wheel unit 70 is low. In this case, it is necessary to use the second gear portion 60 between the shaft of the hydraulic motor 51 and the rear wheel portion 70.

Accordingly, by using the first gear portion 20 and the second gear portion 60 in the continuously variable transmission of the present embodiment, the hydraulic pump 31 and the hydraulic motor 51 are selected as small pumps and motors suitable for bicycles. It is preferable.

The rear wheel part 70 is installed at the rear end of the bicycle to impart a driving force, and consists of the rear wheel 71 and the drum brake 72. The rear wheel 71 is coupled to the driven gear 62 of the second gear unit 60 and is driven to rotate by the hydraulic motor 51 of the hydraulic drive unit 50. The rear wheel 71 and the second gear unit of the bicycle ( A drum brake 72 is provided between the driven gears 62 of 60 for emergency braking of the bicycle when the hydraulic brake unit 40 is abnormal.

The regenerative means 80 is connected to the second gear unit 60 to reuse the driving force of the hydraulic pressure remaining during braking of the hydraulic braking unit 40, and is composed of a driving motor combined generator 81 and a storage battery 82.

The combined drive motor generator 81 is connected via the drive gear 61 and the third clutch 61a of the second gear unit 60, so that the drive gear 61 of the hydraulic brake unit 40 is braked only. Power transmission is interrupted by the third clutch 61a so that the driving force is transmitted. At this time, the driven gear 62 of the second gear unit 60 is preferably the power transmission to the rear wheel portion 70 of the bicycle is blocked by the fourth clutch 62a.

In addition, the combined drive motor generator 81 is connected to the storage battery 82 to operate by using the electricity stored in the storage battery 82 when braking the hydraulic braking unit 40 to generate a driving force to the second gear unit 60 do.

The storage battery 82 is a storage battery that is connected to the drive motor generator 81 to store the electric energy generated by the drive motor generator 81, and the engraving current generated by the electromagnetic induction phenomenon of the drive motor generator 81. It is preferable to configure a rechargeable battery so that it can be stored, and more preferably, a highly efficient battery capable of minimizing discharge loss.

The continuously variable transmission of the bicycle of this embodiment is provided with a regenerative means to enable energy regeneration during braking, and the regenerative means is preferably provided on the side of the drum brake 72 of the rear wheel part 70.

Thus, the regenerative means 80 of the present embodiment is composed of a drive motor-generator 81 and a storage battery 82, and is formed between the driven gear 22 and the hydraulic pump 31 of the first gear unit 20. A first clutch 22a is installed, and a third clutch 61a is installed between the drive gear 61 of the second gear part 60 and the generator 81 for driving motor, and the second gear part 60 A fourth clutch 62a is installed between the driven gear 62 and the rear wheel portion 70 to connect and block power transmission between the component parts of the continuously variable transmission and operate according to the following operating principles.

When the brake is operated by the hydraulic brake unit 40, the power transmission between the drive gear 61 of the second gear unit 60 and the generator 81 combined with the drive motor of the regenerative means 80 is performed by the third clutch 61a. ), The kinetic energy of the bicycle, that is, the driving energy of the hydraulic motor 51 is regenerated by the drive motor combined generator 81 is charged to the storage battery 82 with the extra electric energy.

In order to compensate for the insufficient power when the brake is not operated by the hydraulic brake unit 40, that is, when accelerating a bicycle or climbing a slope, power transmission between the drive motor generator 81 and the drive gear 61 is suppressed. It is connected by three clutches 61a, and power is supplied from the storage battery 82 to the generator 81 combined with the driving motor, so that the driving force of the second gear unit 60 is increased.

Therefore, the operation efficiency of the continuously variable transmission is improved. In addition, the electrical energy of the storage battery 82 may also be used to supply power to other electrical devices such as a control unit, a lamp, and the like.

Particularly, since the regenerative means 80 of the present embodiment is used in the form of a generator combined with a motor and a drive motor, the regenerative means is simple and easy to install, and the drive motor and the generator of the regenerative means are integrally formed. There is an advantage to reduce the installation cost.

The control method of the hydraulic system applied to the continuously variable transmission of the bicycle of the present embodiment can be roughly divided into a pump control system and a valve control system. In the pump control system, the speed of the hydraulic actuator is directly controlled by the hydraulic pump, and is mainly used for driving a linear actuator using a mobile application.

In the case of the rotational load, the pump control system can be configured as an open circuit and a closed loop, as shown in FIGS. 2 and 3, which is called a hydraulic static transmission (HST).

The hydraulic continuously variable transmission of the closed circuit configuration has a simple structure and can easily dissipate the generated heat. On the other hand, using a continuously variable hydraulic continuously variable transmission improves the size of the device, the hydraulic tank capacity and the responsiveness of the system.

In hydraulic continuously variable transmissions, fixed and variable hydraulic elements or two variable hydraulic elements are combined together. 4 and 5, in the case of two hydraulic continuously variable transmissions, the speed diagrams of the hydraulic motors are respectively shown, and if both elements are composed of variable elements, the characteristics thereof can be represented by the combination of the above hydraulic continuously variable transmissions. have. From the above advantages, such a hydraulic continuously variable transmission can be applied to a high efficiency automatic transmission for a bicycle.

In addition, the continuously variable transmission of the present embodiment, as a control unit, implements an automatic transmission function using a main control valve, and the main control valve operates in two modes, an automatic control mode and a manual mode.

In particular, in the automatic control mode, by receiving the sensor signal from the main control valve to control the swash plate angle of the hydraulic pump 31 to generate the driving force of the bicycle according to the speed of the pedal unit 10 and the road conditions by the user. It is automatically controlled.

Therefore, the volume of the pump is adjusted by controlling the swash plate angle of the hydraulic pump 31, and the signal for angular control of the swash plate angle is selectively applied according to the signal of the main control valve such as an automatic control mode and a user manual operation mode. Can be.

In the manual operation mode, the volume of the hydraulic pump 31 can be continuously changed so that the user can obtain arbitrary driving conditions. In this manual operation mode, the volume of the pump is controlled and maintained by a mechanical mechanism.

In the automatic control mode, the swash plate angle of the hydraulic pump 31 is adjusted to be optimized for a user operation state and a road condition according to the crank speed of the pedal unit 10 and the torque of the hydraulic motor 51.

As described above, according to the present invention, by providing a regenerative means to the continuously variable transmission of the bicycle, the drive energy remaining during the deceleration of the bicycle or when the ramp is lowered as electrical energy, and the driving motor when the bicycle is accelerated or climbing the ramp By providing electric energy to the combined generator to generate a driving force in the second gear portion provides an effect of improving the operating efficiency of the continuously variable transmission.

In addition, a clutch is provided between the first gear portion and the hydraulic generating portion to operate the second gear portion by regenerative means to improve the regenerative efficiency of the continuously variable transmission, between the second gear portion and the regenerative means, and between the second gear portion and the rear wheel. The clutch is installed between the parts to block the power transmission to the rear wheel part during braking by the hydraulic brake part and to transfer power to the regenerative means, thereby improving the regenerative efficiency of the continuously variable transmission.

In addition, by using a proportional control valve in the hydraulic braking unit, the braking force of the continuously variable transmission is improved, and a drum brake is additionally installed in the rear wheel to enable braking even in the event of an abnormal hydraulic braking unit. The hydraulic pump and hydraulic tank can be installed to use the residual hydraulic pressure. The hydraulic motor and torque converter are installed in the hydraulic drive unit to prevent excessive hydraulic operation by the hydraulic motor, improving the stability of the continuously variable transmission, and The gears may be installed on the rear wheels, respectively, to minimize the size of the hydraulic generator and the hydraulic driver, and provide an effect of further improving shift efficiency.

By applying the hydraulic energy stored in the hydraulic system by applying the hydraulic system to the continuously variable transmission of the bicycle, it increases the operating efficiency of the bicycle, improves the transmission efficiency, and transmits the rolling force of the pedal to the rear wheel through the fluid, thereby improving friction resistance. It can reduce the power loss by reducing the oil pressure, and the function to generate the hydraulic pressure by the fluid, lubricating each part evenly, preventing wear and corrosion of the parts, and by using the hydraulic continuously variable transmission, there is no operation noise The quiet driving is possible, and since a greater torque can be obtained by hydraulic pressure, the bicycle can be driven even by a small rolling force of the user than a conventional bicycle which is powered by a chain.

The present invention described above can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely examples in all respects and should not be interpreted limitedly.

10: pedal unit 20: first gear unit
30: hydraulic generating unit 40: hydraulic control unit
50: hydraulic drive part 60: second gear part
70: rear wheel part 80: regenerative means

Claims (6)

A first gear unit connected to the pedal of the bicycle to which the rotational force of the pedal is transmitted;
A hydraulic pressure generating part installed downstream of the first gear part to generate hydraulic pressure by a rotational force of a pedal;
A hydraulic brake installed downstream of the hydraulic generator to open and close the hydraulic flow path;
A hydraulic driving unit installed downstream of the hydraulic braking unit to generate a driving force by the hydraulic pressure generated by the hydraulic generating unit;
A second gear part installed downstream of the hydraulic drive part to convert a driving force generated in the hydraulic drive part to be supplied to the rear wheel of the bicycle; And
A regenerative means connected to the second gear part to reuse the driving force remaining during braking of the hydraulic brake part;
The regenerative means includes a drive motor generator connected to the second gear unit, and a storage battery for storing electricity generated by the drive motor generator.
The combined drive motor generator generates a driving force in the second gear unit by electricity stored in the storage battery,
The hydraulic drive unit is installed downstream of the hydraulic brake unit, the pressure relief valve for controlling excessive hydraulic pressure, the hydraulic motor operated by the hydraulic pressure supplied from the hydraulic brake unit, and converts the torque generated from the hydraulic motor A continuously variable transmission for a bicycle having a regenerative means, characterized in that it comprises a torque converter. The method of claim 1,
A continuously variable transmission for a bicycle having regenerative means, characterized in that a first clutch is provided between the first gear portion and the hydraulic pressure generating portion. The method of claim 1,
The hydraulic pressure generating unit, a hydraulic pump connected to the first gear unit, a check valve for controlling the hydraulic pressure generated by the hydraulic pump, a hydraulic tank for storing the hydraulic pressure generated by the hydraulic pump, and generated in the hydraulic pump A continuously variable transmission of a bicycle having a regenerative means, characterized in that it comprises a pressure relief valve for controlling excessive hydraulic pressure. The method of claim 1,
The hydraulic brake unit, continuously variable transmission of the bicycle, characterized in that consisting of a hydraulic brake used a four-port two-position proportional control valve. delete The method of claim 1,
The second gear part is composed of a transmission gear having a drive gear and a driven gear, the drive gear generator is connected to the drive gear via a third clutch, and the driven gear is connected to a bicycle via a fourth clutch. A continuously variable transmission of a bicycle having a regenerative means, characterized in that the rear wheel of the.

Images