WO2020124280A1

WO2020124280A1 - Integrated automatic rear derailleur of bicycle

Info

Publication number: WO2020124280A1
Application number: PCT/CN2018/000426
Authority: WO
Inventors: 郑仲瑞
Original assignee: 郑仲瑞
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2020-06-25

Abstract

Disclosed is an integrated automatic rear derailleur of a bicycle. The automatic rear derailleur comprises a base component (1), a control unit (2), a movable component (3), a chain tension guide member (4), a guide wheel device (5) and a forwards-backwards pedalling sensing component (6), wherein the control unit (2) is fixed to the base component (1), the movable component (3) is pivoted to and assembled at the base component (1) and can move among a plurality of gear positions of a bicycle rear gear shift toothed disc (B3); the guide wheel device (5) comprises a tension wheel (50) and a guide wheel (51) and is supported by the chain tension guide member (4), the tension wheel (50) or the guide wheel (51) is provided with at least two sensing bodies (500, 510); and the forwards-backwards pedalling sensing component (6) is arranged on a side of the tension wheel (50) or the guide wheel (51), and a sensor (61) is arranged at a position, corresponding to the at least two sensing bodies (500, 510), in the forwards-backwards pedalling sensing component (6). The automatic rear derailleur can be automatically switched to the best gear according to a cycling speed, such that cycling is more relaxing and pleasant.

Description

Bicycle integrated automatic rear derailleur

Technical field

The invention relates to an integrated automatic rear derailleur for bicycles, in particular to an integrated automatic rear derailleur, which has no complicated accessories and physical operation buttons installed with speed change, which can smoothly and accurately achieve the automatic speed change function.

Background technique

Bicycles are simple and lightweight, with transportation and sports functions, and are popular with all ages. In order to make riding easier and labor-saving, most bicycles are equipped with gear shifting devices, but the existing transmission is a switch that is mounted on the handlebar. To control the transmission upshift or downshift through cables or wires, but the gears need to be continuously switched during riding, which causes a great operating burden on the rider, so most riders choose the laborious riding method without changing gears , So that the transmission is useless and adds weight. Although there are automatic transmissions on the market, there is no overall design. A variety of components and wires need to be installed on various parts of the bicycle, including speed sensors (installed on the wheels) and torque sensors (installed on the Pedal), rpm sensor (installed on the pedal crank or front gear), generator (installed on the wheel) or battery storage device (installed on the frame)... etc., so the automatic transmission device is on the bicycle The various components and complex wiring on the board cause difficulties in installation, which is too complicated and difficult to maintain for a bicycle that demands simple and light weight, which makes it unacceptable to the market; and it is currently installed on the stepping crank A1 or front chainring The rotation speed sensor A2 (as shown in Figure 1) on the automatic transmission must be synchronized with the derailleur movement and human pedaling movement. The signal will be sensed only once after each pedal rotation, and its sensing resolution is low, so it cannot be Stepping now responds quickly to changes in the stepping signal, so the automatic shift cannot be performed quickly within the optimal time, and smooth and precise automatic shifting cannot be achieved.

Summary of the invention

The main purpose of the present invention is to provide a bicycle-integrated automatic rear derailleur, which is compatible with the existing rear gear shifting gear and is easy to install, and has the speed change function of automatically operating the rear derailleur without manually pressing a button.

The bicycle integrated automatic rear derailleur of the present invention includes:

A base member on which a fixed element is provided to be mounted on a bicycle frame;

A control unit provided on the base member;

A movable member assembled on the base member and movable between a plurality of gear positions of the rear shift gear of the bicycle;

A chain tension guide is pivotally assembled at the end of the movable member and rotates with the pivotal connection;

A guide wheel device supported by the chain tension guide, the guide wheel device includes a tension wheel and a guide wheel;

It is characterized in that the control unit is provided with a servo motor, a first circuit board and a speed sensor, and the crank set of the servo motor is connected with a connecting rod to the movable member to make the movable member relative to the base The component moves between the gears of the chainring. The first circuit board is provided with a microprocessor and a storage unit. The speed sensor is electrically connected to the first circuit board. The rear wheel of the bicycle corresponds to the speed sensor. A speed sensing body is provided at the position to sense the speed of the bicycle; at least two sensing bodies are provided on the tension wheel or the guide wheel of the guide wheel device, and the chain tension guide is provided on one side of the tension wheel or the guide wheel There is a stepping forward and reverse sensing member, the stepping forward and reverse sensing member is provided with a stepping forward and reverse sensing circuit board corresponding to the tension wheel or the guide wheel A sensor is provided at the position of the at least two sensing bodies, the sensor can sense the sensing signal generated by the rotation of each sensing body on the tension wheel or the guide wheel, the stepping forward and reverse sensing circuit board and the first circuit The board is electrically connected.

The bicycle integrated automatic rear derailleur of the present invention, wherein the first circuit board in the control unit includes a current detection circuit for detecting the current consumption of the servo motor. When the current consumption of the servo motor reaches a set value, the control unit will Take corresponding measures, for example: restore the servo motor's previous normal position, or turn off the servo motor power to avoid damage to the servo motor.

The bicycle integrated automatic rear derailleur of the present invention, wherein the first circuit board in the control unit includes a power management circuit and a battery, the power management circuit provides control of the control unit to sleep and wake up or shut down and start up, which can be effective Save electricity and extend usage time.

According to the bicycle integrated automatic rear derailleur of the present invention, the power management circuit can change the operating frequency of the derailleur according to the amount of battery power, which can achieve the power saving function and prolong the use time.

The bicycle integrated automatic rear derailleur of the present invention, wherein the at least two sensors provided on the pedaling forward and reverse sensing circuit boards are respectively set at different angles, and the sensor body on the guide wheel device is installed on the sensor The position induced by the rotation can sense the phase difference of the signal and provide the judgment of pedaling forward and reverse. As the basis of the shifting timing of the derailleur, it can achieve the effect of protecting the transmission. The pedal forward and reverse sensing circuit board The sensing body on the magnetic induction or light induction.

The bicycle integrated automatic rear derailleur of the present invention, wherein the stepping forward/reverse sensing circuit board not only provides a stepping forward/reverse signal, the forward stepping signal can also be used as a judgment of the derailleur's stepping, as the power management The basis for the circuit to wake up or start the system is to achieve the action of the derailleur to start automatically. When the positive stepping signal is not received for a period of time, it can be used as the basis for the power management circuit to sleep or shut down. Electric energy, prolong the use time.

The bicycle integrated automatic rear derailleur of the present invention, wherein the first circuit board in the control unit has a communication unit, which can perform two-way data exchange with other mobile devices, and the communication unit is wired or wireless communication the way.

The bicycle integrated automatic rear derailleur of the present invention, wherein the control circuit in the first circuit board in the control unit will perform the shift boundary detection action of the derailleur at the first start, when the pedal is driven by hand or stepped on When the front chainring rotates and the chain links the guide wheel and the tension wheel, the control circuit will control the servo motor to search for the upper and lower boundaries. The search process will detect the current consumption of the servo motor through the current detection circuit. The servo motor When the current consumption reaches a set value, the control circuit will record the position. The control circuit will then operate in this range, so the upper and lower boundaries of the derailleur can be automatically detected.

The bicycle integrated automatic rear derailleur of the present invention, wherein the control circuit in the first circuit board in the control unit can accept the boundary detection command transmitted by the communication unit, and re-execute the boundary detection action, when the detection is completed, Send the detection result back to the communication unit.

The bicycle integrated automatic rear derailleur of the present invention, wherein the control circuit in the first circuit board in the control unit includes an acceleration sensor, which detects the dial when the pedal is pedaled or when the pedal is rotated manually According to the vibration value of the chain, the control circuit will fine-tune or modify the output position of the servo motor according to the vibration value, so that the vibration value of the acceleration sensor is reduced to a set value, so the effect of automatic calibration of the derailleur can be achieved, eliminating Trouble adjusting the derailleur.

The bicycle integrated automatic rear derailleur of the present invention, wherein the control circuit in the first circuit board in the control unit performs the gear shift position detection operation after the boundary detection is completed at the initial start, and the control circuit includes acceleration The sensor needs to step on or manually rotate the pedal when performing this action. The control circuit will drive the servo motor to detect the vibration value of the acceleration sensor at all positions in the upper and lower boundaries. The control circuit will record the vibration value and position in all positions , The control circuit calculates that the reversal point with less vibration is the proper tooth position and records it to the storage unit, so the position with the least vibration is the best tooth position, which can automatically set the derailleur The effect of gear position avoids the trouble of manual adjustment of the derailleur.

The bicycle integrated automatic rear derailleur of the present invention, wherein the control circuit in the first circuit board in the control unit can accept the gear position detection command transmitted by the communication unit, and re-execute the derailleur gear position detection Action, when the detection is completed, the detection result is returned to the communication unit.

The bicycle integrated automatic rear derailleur of the present invention additionally includes a battery, which is electrically connected to the first circuit board in the control unit to supply power.

The bicycle integrated automatic rear derailleur of the present invention has the advantage that the stepping forward and reverse sensing circuit board arranged on the chain tension guide relative to the position of the tension wheel or the guide wheel of the guide wheel device can be precise and fast Responding to the change of the pedaling signal, it can provide a resolution of up to 4 times higher than the traditional rotation speed installed on the pedal crank or front chainring, to solve the key of the bicycle automatic transmission in the derailleur movement and human pedaling movement need to be synchronized, Therefore, the chain can be wound up or down smoothly, and the smooth and accurate automatic transmission function can be achieved.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of the conventional rotation speed sensor installed on the stepping crank.

Figure 2 is a perspective view of an embodiment of the present invention.

Fig. 3 is a perspective view of another embodiment of the invention.

4 is a block diagram of a control unit according to an embodiment of the invention.

FIG. 5 is a schematic diagram of an embodiment of the present invention assembled on a bicycle.

Fig. 6 is an enlarged schematic view of a guide wheel device according to an embodiment of the invention.

7 is a perspective view of another embodiment of the present invention.

Fig. 8 is a flowchart of the operation of the present invention.

DESCRIPTION OF REFERENCE NUMERALS: 1- base member; 10 fixed element; 2- control unit; 20- servo motor; 200- crank; 201- connecting rod; 21- battery; 22- first circuit board; 220- micro processing 221-storage unit; 222-power management circuit; 223-current detection circuit; 224-acceleration sensor; 225-communication unit; 23-speed sensor; 3-movable member; 4-chain tension guide; 5-guide Wheel device; 50-tension wheel; 500-induction body; 51-guide wheel; 510-induction body; 6-stepping forward and reverse sensing circuit board; 60-stepping forward and reverse sensing circuit board; 61-sensor; A1- Stepping on the crank; A2-returning speed sensor; B-frame; B1-rear wheel; B2-speed sensor; B3-rear shift gear; B4-stepping pedal; B5-front gear; B6-chain.

detailed description

The technical means adopted by the present invention in order to achieve the above-mentioned use purpose and effect, hereby cite preferred and feasible embodiments, and in conjunction with the drawings, the details are as follows:

For an embodiment of the present invention, please refer to FIGS. 2-6. The integrated automatic rear derailleur of the bicycle includes:

A base member 1 on which a fixing element 10 is provided to be mounted on the bicycle frame B;

A control unit 2 is provided on the base member 1. The control unit 2 is provided with a servo motor 20, a battery 21, a first circuit board 22 and a speed sensor 23. The crank 200 of the servo motor 20 is connected with a connecting rod 201, the servo motor 20 and the battery 21 are electrically connected to the first circuit board 22, the first circuit board 22 is provided with a microprocessor 220, a storage unit 221, a power management circuit 222, a current detection circuit 223, acceleration A sensor 224 and a communication unit 225, the speed sensor 23 is electrically connected to the first circuit board 22, and a speed sensor B2 is provided on the rear wheel B1 of the bicycle corresponding to the speed sensor 23 to sense the speed of the bicycle, The speed sensor 23 is magnetic induction or light induction;

A movable member 3 is assembled on the base member 1, and a connecting rod 201 connected to the crank 200 of the servo motor 20 is connected to the movable member 3 to move the movable member 3 relative to the base The member 1 moves between a plurality of gear positions of the rear shift gear B3 of the bicycle;

A chain tension guide 4, pivotally assembled at the end of the movable member 3, and rotates with the pivotal joint;

A guide wheel device 5, supported by the chain tension guide 4, the guide wheel device 5 includes a tension wheel 50 and a guide wheel 51, the tension wheel 50 is provided with at least two inductors 500, the at least two inductors 500 are respectively Set at different angles;

A stepping forward and reverse sensing member 6 is provided on the chain tension guide 4 and corresponds to one side of the tension wheel 50. The stepping forward and reverse sensing member 6 is provided with a stepping forward and reverse sensing circuit board 60, a sensor 61 is provided on each position of the stepping forward and reverse sensing circuit board 60 corresponding to the at least two sensing bodies 500 on the tension wheel 50, and the sensor 61 can sense each induction on the tension wheel 50 The sensing signal generated by the rotation of the body 500, the sensor 61 and the sensing body 500 are magnetic induction or light induction, the stepping forward and reverse sensing circuit board 60 is electrically connected to the first circuit board 22.

When using, please refer to Figure 2-6, the integrated automatic rear derailleur is set on the frame B of the bicycle through the fixing element 10 on the base member 1, the automatic rear derailleur can be It is suitable for different car models, and the assembly is very convenient and fast; when the user is riding a bicycle, the front chainring B5 is driven to rotate by stepping on the pedal B4, and the front chainring B5 drives the rear shifting chainring B3 to rotate through the chain B6, and The tension wheel 50 and the guide wheel 51 of the automatic rear derailleur are also linked by the chain B6, and the sensor body 500 on the tension wheel 50 rotates accordingly, and the forward and reverse sensing members are stepped on by one side The sensor 61 of 6 senses the change of the magnetic field to know the stepping information and the rotation speed of the tension wheel 50, which can instantly detect whether the user has stepped on, can more accurately sense the rotation speed, and send the rotation speed information to the control unit 2. The microprocessor 220 and the storage unit 221 on the first circuit board 22 perform information processing as a basis for driving the rear derailleur to automatically change speed, and then drive the crank 200 of the servo motor 20 to rotate and drive the connecting rod 201 to move. Control the movement of the movable member 3 to automatically shift to the best gear. The integrated automatic rear derailleur of the present invention is installed on the bicycle. The overall volume is small and the weight is light, which will not increase the physical burden of the rider and can be effectively solved. The installation of sensors and weight problems on various parts of the bicycle, without the need to install manual button control, makes riding more convenient and easy.

For another embodiment of the present invention, please refer to FIG. 7, at least two sensing bodies 500 on the tension wheel 50 of the guide wheel device 5 can also be provided on the guide wheel 51, so that the guide wheel 51 is provided with at least Two sensing bodies 510, the stepping forward and reverse sensing circuit board 6 is provided on the chain tension guide 4 and corresponds to one side of the guide wheel 51, and the stepping forward and reverse sensing circuit board 6 corresponds to the A sensor 60 is provided at the position of the at least two sensing bodies 510 on the guide wheel 51. The sensor 60 can also sense the sensing signal generated by the rotation of each sensing body 510 on the guide wheel 51, just like the operation mode of the above embodiment , Can achieve the same effect and purpose.

The operation flowchart of the automatic derailleur according to the present invention is shown in FIG. 8. When the pedal pedal B4 of the bicycle performs a pedaling action, the control unit 2 determines whether it is turned on, and when it is judged as “No”, the hardware is turned on and judged as When "Yes", it will receive various data, and then determine whether there is a connection with the mobile device. If it is "Yes", it will transmit and receive information with the mobile device. If it is "No", the control unit 2 will calculate the parameters. ：1. Calculate the rotation speed before the gear ratio of the front gear B5 to the tension wheel 50 or the

guide wheel

51, 2. Calculate the voltage of the

battery

21, 3. Calculate the driving speed after sensing the speed of the wheel B1, and then calculate the driving speed according to the calculated parameters (For example, speed) Determine whether shifting is required. If it is "Yes", then determine whether it is positive stepping. If it is "No", return to determining whether to shut down. If it is positive stepping, if it is "Yes" If it is "No", it returns to the judgment whether to shut down. If it is normal, if it is "Yes", it switches the gear. If it is "No", it returns to the judgment whether it is necessary. Shut down, after switching the gear, it will return to determine whether to shut down, if it is "Yes", the hardware will be shut down, if it is "No", it will return to receive all the data, and then the automatic shift mechanism will be carried out in sequence as shown in the previous actions , When the pedal pedal B4 of the bicycle is pedaled in the reverse direction and without pedaling, the control unit 2 can control the derailleur to not change speed, can prevent the chain B6 from falling off the chain and damage the derailleur, and can avoid the derailleur In this way, the user can automatically control the speed through the automatic derailleur when riding a bicycle, and can automatically switch to the best gear according to the speed of the bicycle, making the bicycle more relaxed and happy.

In summary, the present invention has indeed achieved the intended purpose and efficacy, and is more ideal and practical than the existing ones. However, the above embodiments are only specific descriptions of the preferred embodiments of the present invention. This embodiment is not intended to limit the claims of the present invention. Any other changes and modifications made without departing from the technical means disclosed by the present invention should be included in the claims covered by the present invention.

Claims

A bicycle integrated automatic rear derailleur, including:

A base member on which a fixed element is provided to be mounted on a bicycle frame;

A control unit provided on the base member;

A movable member assembled on the base member and movable between a plurality of gear positions of the rear shift gear of the bicycle;

A chain tension guide is pivotally assembled at the end of the movable member and rotates with the pivotal connection;

A guide wheel device supported by the chain tension guide, the guide wheel device includes a tension wheel and a guide wheel;

It is characterized in that the control unit is provided with a servo motor, a first circuit board and a speed sensor, and the crank set of the servo motor is connected with a connecting rod to the movable member to make the movable member relative to the base The component moves between the gears of the chainring. The first circuit board is provided with a microprocessor and a storage unit. The speed sensor is electrically connected to the first circuit board. The rear wheel of the bicycle corresponds to the speed sensor. A speed sensing body is provided at the position to sense the speed of the bicycle; at least two sensing bodies are provided on the tension wheel or the guide wheel of the guide wheel device, and the chain tension guide is provided on one side of the tension wheel or the guide wheel There is a stepping forward and reverse sensing member, the stepping forward and reverse sensing member is provided with a stepping forward and reverse sensing circuit board corresponding to the tension wheel or the guide wheel A sensor is provided at the position of the at least two sensing bodies, the sensor can sense the sensing signal generated by the rotation of each sensing body on the tension wheel or the guide wheel, the stepping forward and reverse sensing circuit board and the first circuit The board is electrically connected.
The bicycle integrated automatic rear derailleur according to claim 1, wherein the first circuit board in the control unit includes a current detection circuit that detects the current consumed by the servo motor.
The bicycle integrated automatic rear derailleur according to claim 1, wherein the first circuit board in the control unit includes a power management circuit and a battery, and the power management circuit provides sleep and wake-up or shutdown and power-on control.
The bicycle integrated automatic rear derailleur according to claim 3, wherein the power management circuit can change the transmission operating frequency according to the amount of battery power.
The bicycle-integrated automatic rear derailleur according to claim 1, wherein at least two sensors provided on the pedaling forward and reverse sensing circuit boards are respectively set at different angles, and the induction body on the guide wheel device is installed At the position where the sensor can be sensed by rotation, it can sense the phase difference of the signal and provide the judgment of the forward and reverse pedaling. It is used as the basis for the timing of the shifting of the derailleur. The sensing body is magnetic induction or light induction.
The bicycle integrated automatic rear derailleur according to claim 1 or 3, wherein the stepping forward and reverse sensing circuit board not only provides a stepping forward and reverse signal, the forward stepping signal can also be used as a derailleur pedal As a basis for the power management circuit to wake up or start the system, the derailleur can start its own action.
The bicycle integrated automatic rear derailleur according to claim 1, wherein the first circuit board in the control unit has a communication unit which can communicate with other mobile devices in two-way data, the communication unit is Wired or wireless communication.
The bicycle-integrated automatic rear derailleur according to claim 1, wherein the control circuit in the first circuit board in the control unit performs the shift boundary detection operation of the derailleur at the initial startup.
The bicycle integrated automatic rear derailleur according to claim 7, wherein the control circuit in the first circuit board in the control unit can accept the boundary detection command transmitted from the communication unit and re-execute the boundary detection action, When the detection is completed, the detection result is sent back to the communication unit.
The bicycle-integrated automatic rear derailleur according to claim 1, wherein the control circuit in the first circuit board in the control unit includes an acceleration sensor, the acceleration when the pedal is pedaled or when the pedal is manually rotated The sensor will detect the vibration value of the derailleur, and the control circuit will fine-tune or modify the output position of the servo motor according to the vibration value to reduce the vibration value of the acceleration sensor to a set value.
The bicycle-integrated automatic rear derailleur according to claim 1, wherein the control circuit in the first circuit board in the control unit performs the gear shift position detection operation after the boundary detection is completed at the initial startup, the The control circuit includes an acceleration sensor. When performing this action, you need to step on or manually rotate the pedal. The control circuit will drive the servo motor to detect the vibration value of the acceleration sensor at all positions in the upper and lower boundaries. The control circuit will record all positions. Vibration value and position.
The bicycle-integrated automatic rear derailleur according to claim 7, wherein the control circuit in the first circuit board in the control unit can receive the gear position detection command transmitted from the communication unit and re-execute the dial Chain gear position detection action, when the detection is completed, the detection result is returned to the communication unit.
The bicycle integrated automatic rear derailleur according to claim 1, further comprising a battery, the battery is electrically connected to the first circuit board in the control unit to supply power.