阅读说明：本技术 变速执行机构、自行车变速器及控制方法 (Speed change actuating mechanism, bicycle speed changer and control method ) 是由 刘志坤 巩伟杰 于 2021-07-23 设计创作，主要内容包括：本申请提供了一种变速执行机构、自行车变速器及控制方法,应用于自行车变速器,包括舵机、中空支架和固定有变速线的绞盘；中空支架套设于舵机的输出轴所在的一端,输出轴穿过中空支架后与绞盘连接,从而通过舵机输出轴带动绞盘转动,进而拉紧或放松绞盘上固定的变速线,实现电子式变速,整个装置成本较低,且适用于改装传统机械式变速系统的自行车,适用范围广。(The application provides a variable speed actuating mechanism, a bicycle speed changer and a control method, which are applied to the bicycle speed changer and comprise a steering engine, a hollow bracket and a winch fixed with a variable speed wire; the one end at the output shaft place of steering wheel is located to the cavity support cover, and the output shaft passes behind the cavity support to be connected with the capstan winch to drive the capstan winch through the steering wheel output shaft and rotate, and then the variable speed line of fixing on the taut or relaxation capstan winch realizes the electronic type variable speed, and whole device cost is lower, and is applicable to the bicycle of repacking traditional mechanical type speed change system, and application scope is wide.)

1. A variable speed actuating mechanism is applied to a bicycle speed changer and is characterized by comprising a steering engine, a hollow bracket and a winch fixed with a variable speed line;

the hollow support is sleeved at one end where an output shaft of the steering engine is located, and the output shaft penetrates through the hollow support and then is connected with the winch.

2. The variable speed actuator of claim 1, further comprising a friction spring and a clamping member;

the friction elastic sheet is arranged on the hollow support and meshed with the teeth of the winch, and the clamping piece is arranged on the outer side of the steering engine.

3. A bicycle derailleur, characterized in that it comprises a gear change actuator according to claim 1 or 2, and

a shift button configured to acquire an upshift signal or a downshift signal;

and the controller is electrically connected with the gear shift button and the gear shift execution mechanism and is configured to control the gear shift execution mechanism to perform an upshift operation or a downshift operation according to the upshift signal or the downshift signal.

4. The bicycle shifter of claim 3, wherein the shift button includes a first circuit board, a first bracket, a first battery, a first housing and a first clip;

the first circuit board and the first battery are mounted on two sides of the first support, the first circuit board, the first support and the first battery are mounted inside the first shell, and the clamping ring is mounted outside the first shell.

5. The bicycle shifter of claim 4, wherein the first circuit board includes:

a button switch configured to acquire an upshift signal or a downshift signal according to a high-low level;

a wireless transmission module electrically connected with the button switch and configured to wirelessly transmit the upshift signal or the downshift signal;

and the battery interface is electrically connected with the button switch and the wireless transmitting module.

6. The bicycle shifter of claim 3, wherein the controller includes a second circuit board, a third circuit board, a second battery, a magnetically attractive terminal, a second bracket, a second housing, and a second clamping ring, the magnetically attractive terminal electrically connects the second battery, the second battery is mounted inside the second bracket, the second circuit board and the third circuit board are mounted on both sides of the second bracket, the second circuit board, the third circuit board, the second battery, the magnetically attractive terminal and the second bracket are mounted inside the second housing, and the second clamping ring is mounted outside the second housing.

7. The bicycle shifter of claim 6, wherein the second circuit board includes:

the wireless receiving module is wirelessly connected with the gear shift button and is configured to wirelessly receive the upshifting signal or the downshifting signal;

the control module is electrically connected with the wireless receiving module and is configured to output a driving signal according to the upshifting signal or the downshifting signal;

a voltage reduction module electrically connected with the wireless receiving module and the control module and configured to supply power to the wireless receiving module and the control module.

8. The bicycle shifter of claim 7, wherein the third circuit board includes:

the steering engine control module is electrically connected with the control module and is configured to rotate the steering engine by a corresponding angle according to the driving signal;

a motor control module electrically connected with the control module and configured to rotate a motor for a corresponding number of turns according to the driving signal;

the motor encoder is electrically connected with the motor control module and the control module and is configured to feed back the current gear of the motor control module to the control module in real time;

and the boosting and charging module is electrically connected with the rudder machine control module, the motor control module and the motor encoder and is configured to boost the output voltage of the second battery and access an external charging power supply to supply power to the rudder machine control module, the motor control module and the motor encoder.

9. A method of controlling a bicycle derailleur according to any one of claims 3-8, comprising the steps of:

reading the recorded initial gear of the speed change actuating mechanism;

restoring the gear of the speed change actuating mechanism to the initial gear;

controlling the gear-shifting executing mechanism to rotate by a corresponding gear angle according to the upshifting signal or the downshifting signal in combination with the initial gear;

and recording a new gear after the gear angle corresponding to the swing of the speed change actuating mechanism.

10. The control method according to claim 9, wherein said controlling the shift actuator to rotate by a corresponding gear angle in conjunction with the initial gear in accordance with the upshift or downshift signal includes:

finely adjusting the position of the gear shifting actuating mechanism upwards or downwards according to the upshifting signal or the downshifting signal and the initial gear when the gear shifting button is pressed for more than a first preset time length;

when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is in the highest gear or the lowest gear, keeping the gear unchanged;

when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is not in the highest gear or the lowest gear, the gear of the gear shift execution mechanism is increased by one gear or decreased by one gear according to the gear shift up signal or the gear shift down signal and the initial gear;

the first preset duration is longer than the second preset duration.

Technical Field

The application belongs to the technical field of bicycle speed changers, and particularly relates to a speed change executing mechanism, a bicycle speed changer and a control method.

Background

The traditional mechanical speed change system carries out speed change operation through various mechanical structures such as gears, ratchets, winches and the like in a speed change operation mechanism, and along with the increase of bicycle gears, the mechanical structure of mechanical speed change becomes complicated and heavy, so that the problem of reliability reduction is brought; meanwhile, the mechanical speed change also has the problem of fatigue fracture of the speed change wire due to the winding of multiple turns of the speed change wire.

At present, some manufacturers adopt an electronic speed change system, remove a speed change line of a traditional speed change mechanical system, and directly utilize an electronic control unit to replace a complex mechanical structure, but the existing electronic speed change system is generally a whole set of electronic speed changer, needs to completely replace the traditional mechanical speed change system on a bicycle, and has higher cost.

Disclosure of Invention

The application aims to provide a speed change executing mechanism, a bicycle speed changer and a control method, and aims to solve the problem that a traditional electronic speed change system is high in cost.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a variable speed actuator, including a steering engine, a hollow bracket, and a winch to which a variable speed cable is fixed;

the hollow support is sleeved at one end where an output shaft of the steering engine is located, and the output shaft penetrates through the hollow support and then is connected with the winch.

In another possible embodiment of the first aspect, the shift actuator further comprises a friction spring and a clamping member;

the friction elastic sheet is arranged on the hollow support and meshed with the teeth of the winch, and the clamping piece is arranged on the outer side of the steering engine.

In a second aspect, embodiments of the present application provide a bicycle derailleur comprising the shift actuator, and

a shift button configured to acquire an upshift signal or a downshift signal;

and the controller is electrically connected with the gear shift button and the gear shift execution mechanism and is configured to control the gear shift execution mechanism to perform an upshift operation or a downshift operation according to the upshift signal or the downshift signal.

In another possible embodiment of the second aspect, the shift button includes a first circuit board, a first bracket, a first battery, a first housing, and a first clip ring;

the first circuit board and the first battery are mounted on two sides of the first support, the first circuit board, the first support and the first battery are mounted inside the first shell, and the clamping ring is mounted outside the first shell.

In another possible embodiment of the second aspect, the first circuit board includes:

a button switch configured to acquire an upshift signal or a downshift signal according to a high-low level;

a wireless transmission module electrically connected with the button switch and configured to wirelessly transmit the upshift signal or the downshift signal;

and the battery interface is electrically connected with the button switch and the wireless transmitting module.

In another possible embodiment of the second aspect, the controller includes a second circuit board, a third circuit board, a second battery, a magnetically attractive terminal, a second bracket, a second housing, and a second clamping ring;

the magnetic terminal is electrically connected with the second battery, the second battery is installed inside the second support, the second circuit board and the third circuit board are installed on two sides of the second support, the second circuit board, the third circuit board, the second battery, the magnetic terminal and the second support are installed inside the second shell, and the second clamping ring is installed outside the second shell.

In another possible embodiment of the second aspect, the second circuit board includes:

the wireless receiving module is wirelessly connected with the gear shift button and is configured to wirelessly receive the upshifting signal or the downshifting signal;

the control module is electrically connected with the wireless receiving module and is configured to output a driving signal according to the upshifting signal or the downshifting signal;

a voltage reduction module electrically connected with the wireless receiving module and the control module and configured to supply power to the wireless receiving module and the control module.

In another possible embodiment of the second aspect, the third circuit board includes:

the steering engine control module is electrically connected with the control module and is configured to rotate the steering engine by a corresponding angle according to the driving signal;

a motor control module electrically connected with the control module and configured to rotate a motor for a corresponding number of turns according to the driving signal;

the motor encoder is electrically connected with the motor control module and the control module and is configured to feed back the current gear of the motor control module to the control module in real time;

and the boosting and charging module is electrically connected with the rudder machine control module, the motor control module and the motor encoder and is configured to boost the output voltage of the second battery and access an external charging power supply to supply power to the rudder machine control module, the motor control module and the motor encoder.

In a third aspect, embodiments of the present application provide a method of controlling a bicycle transmission, comprising the steps of:

reading the recorded initial gear of the speed change actuating mechanism;

restoring the gear of the speed change actuating mechanism to the initial gear;

controlling the gear-shifting executing mechanism to rotate by a corresponding gear angle according to the upshifting signal or the downshifting signal in combination with the initial gear;

and recording a new gear after the gear angle corresponding to the swing of the speed change actuating mechanism.

In another possible embodiment of the third aspect, the controlling the shift actuator to rotate by a corresponding gear angle in conjunction with the initial gear according to the upshift or downshift signal includes:

finely adjusting the position of the gear shifting actuating mechanism upwards or downwards according to the upshifting signal or the downshifting signal and the initial gear when the gear shifting button is pressed for more than a first preset time length;

when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is in the highest gear or the lowest gear, keeping the gear unchanged;

when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is not in the highest gear or the lowest gear, the gear of the gear shift execution mechanism is increased by one gear or decreased by one gear according to the gear shift up signal or the gear shift down signal and the initial gear;

the first preset duration is longer than the second preset duration.

Compared with the prior art, the embodiment of the application has the advantages that: foretell variable speed actuating mechanism drives the capstan winch through the steering wheel output shaft and rotates, and then the variable speed line of fixing on the taut or relax capstan winch realizes the electronic type variable speed, and whole device is the repacking external member, can directly install on the bicycle that adopts traditional mechanical type speed change system, and the cooperation is used, and the cost is lower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a shift actuator according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of a variable speed actuator provided in accordance with an embodiment of the present application;

FIG. 3(a) is a schematic diagram of a first construction of a winch of the variable speed actuator according to the embodiment of the present application;

FIG. 3(b) is a second schematic diagram of a winch of the variable speed actuator according to the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a shift button of the bicycle shifter provided in the embodiments of the present application;

FIG. 5 is an exploded view of a shift button of the bicycle shifter provided in accordance with the present embodiment of the application;

FIG. 6 is a circuit diagram of a first circuit board of the bicycle shifter provided in the embodiments of the present application;

FIG. 7 is a schematic structural diagram of a controller of a bicycle shifter provided in an embodiment of the present application;

FIG. 8 is an exploded view of a controller for a bicycle shifter provided in accordance with an embodiment of the present application;

FIG. 9 is a circuit diagram of a second circuit board and a third circuit board of the bicycle shifter provided in the embodiments of the present application;

FIG. 10 is a flowchart of a method of controlling a bicycle shifter provided in an embodiment of the present application.

Description of reference numerals:

100-steering engine, 101-clamping piece, 200-hollow bracket, 300-winch, 301-friction shrapnel, 400-speed change button, 410-first circuit board, 411-button switch, 412-wireless sending module, 413-battery interface, 420-first bracket, 430-first battery, 440-first shell, 450-first clamping ring, 500-controller, 510-second circuit board, 511-wireless receiving module, 512-control module, 513-voltage reduction module, 520-third circuit board, 521-steering engine control module, 522-motor control module, 523-motor encoder, 524-voltage boost charging module, 530-second battery, 540-magnetic terminal, 550-second bracket, 560-second shell, 570-second gripper ring.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The existing electronic speed change system of the bicycle has higher selling price and cost because the speed change line of the traditional mechanical speed change system is removed and the electronic control unit is directly utilized to replace a complex mechanical structure, and the electronic speed change system can not be popularized to the common bicycle; meanwhile, the electronic speed change system in the market is mainly a whole set of speed change kit, and the traditional mechanical speed change system on the bicycle needs to be completely replaced, so that the cost is higher.

Therefore, the application provides a variable speed actuating mechanism, adopt cavity support connection steering wheel and capstan winch to drive the capstan winch through the steering wheel output shaft and rotate, and then the taut variable speed line that perhaps loosens fixed on the capstan winch, make bicycle derailleur rear derailleur take place the displacement, stir the bicycle chain to another flywheel of bicycle derailleur on, realize the electronic type variable speed, realize that electronic type variable speed and cost are lower, be applicable to the bicycle of repacking traditional mechanical type speed change system simultaneously.

The shift actuator provided by the present application will be described by way of example with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of a shift actuator according to an embodiment of the present application, and as shown in fig. 1, for convenience of description, only the parts related to the embodiment are shown, and detailed descriptions are as follows: illustratively, the method can comprise the following steps: the steering engine 100, the hollow bracket 200 and the winch 300 fixed with a speed change line; the hollow bracket 200 is sleeved at one end where the output shaft of the steering engine 100 is located, and the output shaft penetrates through the hollow bracket 200 and then is connected with the winch 300.

In this application embodiment, the output shaft through the steering wheel rotates and drives the capstan winch and rotate, rotates through driving the capstan winch and makes the variable speed line of fixing on the capstan winch taut or relax to make bicycle derailleur rear derailleur take place the displacement, stir the bicycle chain to another flywheel of bicycle derailleur on, realize the electronic type variable speed. Meanwhile, a steering engine mounting hole, a friction elastic sheet mounting position and a speed change line pipe threading seat are arranged on the hollow support. The radius of the capstan can be adjusted and set according to the actual situation (for example, 10mm can be used), and the tooth shape of the teeth on the capstan is sawtooth-shaped.

Fig. 2 is an exploded view of a variable speed actuator according to an embodiment of the present application, fig. 3(a) is a first structural diagram of a winch of the variable speed actuator according to the embodiment of the present application, and fig. 3(b) is a second structural diagram of the winch of the variable speed actuator according to the embodiment of the present application; as shown in fig. 2, 3(a) and 3(b), the shift actuator may further include a friction spring 301 and a clamping member 101; the friction shrapnel 301 is arranged on the hollow bracket 200 and is meshed with the teeth of the winch 300, and the clamping piece 101 is arranged on the outer side of the steering engine.

In this application embodiment, the tooth intermeshing of friction shell fragment and capstan winch forms the frictional force when the capstan winch rotates through the elasticity of friction shell fragment material, and the moment that this frictional force produced is greater than the return moment of rear derailleur and is less than steering wheel output torque, can prevent that the capstan winch from being pulled by the return moment of rear derailleur and causing the reversal. Meanwhile, the friction force caused by the friction elastic sheet can be modified by modifying the thickness of the friction elastic sheet. The friction elastic sheet can comprise circular arc-shaped protrusions or sawtooth-shaped protrusions, when the protrusions of the friction elastic sheet are circular arc-shaped, the teeth of the winch are mutually meshed circular arc-shaped teeth, the abrasion of the protrusions on the winch and the friction elastic sheet is small, but the protrusions are not directional, and the same friction force can be generated during upshifting and downshifting. When the protrusions of the friction elastic sheet are in a sawtooth shape, the teeth of the winch are in a sawtooth shape and are meshed with each other, the angle of the inclined plane in the upshifting direction is smaller, and the angle of the inclined plane in the downshifting direction is larger, so that smaller friction force is brought in the upshifting direction, and larger friction force is brought in the downshifting direction. The shift actuator is mounted to the bicycle shifter by a clamp.

The application of the variable speed actuating mechanism can be refitted aiming at various existing bicycles using the traditional mechanical variable speed system, the threshold of variable speed debugging of the bicycle is reduced, a rider does not need to master the pull wire ratio of the speed changer, the upper limit and the lower limit of variable speed and knowledge needed to be involved in the debugging process of shifting the variable speed stroke and the like, the variable speed system can be debugged by himself, the response time of the variable speed system can be reduced, and the accuracy of variable speed is improved.

Fig. 4 is a schematic structural view of a shift button of a bicycle shifter provided in an embodiment of the present application, and fig. 7 is a schematic structural view of a controller of a bicycle shifter provided in an embodiment of the present application, as shown in fig. 4 and 7, for example, the embodiment of the present application provides a bicycle shifter, which may include, for example: a shift actuator, and a shift button 400 configured to acquire an upshift signal or a downshift signal; and a controller 500 electrically connected to the shift button 400 and the shift actuator and configured to control the shift actuator to perform an upshift operation or a downshift operation according to the upshift signal or the downshift signal.

In the embodiment of the application, the gear-up signal or the gear-down signal of a user is obtained through the gear-shifting button, and the gear-shifting executing mechanism is controlled to perform the gear-up operation or the gear-down operation through the controller according to the gear-up signal or the gear-down signal, so that the speed and the gear of the bicycle can be adjusted directly through electronic signal transmission without mechanical braking.

Fig. 5 is an exploded view of a shift button of a bicycle shifter provided in an embodiment of the present application, and as shown in fig. 5, an exemplary shift button 400 includes: a first circuit board 410, a first bracket 420, a first battery 430, a first case 440, and a first clip 450; the first circuit board 410 and the first battery 430 are mounted at both sides of the first bracket 420, the first circuit board 410, the first bracket 420 and the first battery 430 are mounted inside the first case 440, and the clip 450 is mounted outside the first case 440.

In the embodiment of the application, the upshift requirement or the downshift requirement of a user is acquired through the first circuit board; the first circuit board and the first battery are connected through the first support, a mounting hole for connecting the first shell is provided, a gap between the printed circuit board and the wireless sending module is filled, and the first circuit board is protected; supplying power to the first circuit board through the first battery; the first circuit board, the first bracket and the first battery are protected by the first shell, so that the influence of the external environment on the circuit is reduced; the first shell comprises a top cover and a bottom cover, the bottom cover is provided with a thin wall which is consistent with the outer edge of the top cover in shape, and after the top cover and the bottom cover are assembled, external liquid can enter the shell only by passing through the thin wall due to the action of gravity. Consequently, this structure can prevent to a certain extent that rain from spattering the intaking that brings, has certain waterproof dustproof ability for guaranteeing the shell simultaneously, will annotate waterproof glue in each hole department of shell after the assembly is accomplished, keeps the light touch switch still work when preventing into water. Install shift button on the bicycle handlebar through first clamp ring, first clamp ring includes first clamp ring and first clamp ring down, the adjacent one end of first clamp ring and first clamp ring all is equipped with the through-hole of mutually supporting on first, form a pivot after inserting the bolt, can make first clamp ring rotate around this pivot, be convenient for install, the other end of first clamp ring and the other end of first clamp ring all are equipped with the hole of mountable locking bolt down, can lock first clamp ring after first clamp ring and handlebar cooperation, thereby fix shift button on the bicycle handlebar, still be equipped with the hole of being connected with first shell simultaneously at first clamp ring both ends, be used for through bolt and first shell fixed connection.

Fig. 6 is a circuit diagram of a first circuit board of a bicycle derailleur provided in an embodiment of the present application, as shown in fig. 6, for example, the first circuit board 410 may include: a push switch 411 configured to acquire an upshift signal or a downshift signal according to a high-low level; a wireless transmission module 412 electrically connected to the button switch 411 and configured to wirelessly transmit an upshift signal or a downshift signal; the battery interface 413 is electrically connected to the button switch 411 and the wireless transmission module 412.

In the embodiment of the application, the up-shift signal or the down-shift signal is obtained by the button switch according to the high and low levels, for example, the button switch may include an up-shift button and a down-shift button, the up-shift signal and the down-shift signal are respectively output after being pressed, the level states of the up-shift button and the down-shift button are monitored by the wireless transmission module, whenever the level change of the pin of the up-shift button or the down-shift button is monitored, the corresponding up-shift signal or the down-shift signal is transmitted to the wireless reception module, and the battery power supply or the external power supply is connected through the battery interface to supply power to the button switch and the wireless transmission module.

Fig. 8 is an exploded view of a controller of a bicycle shifter provided in an embodiment of the present application, as shown in fig. 8, for example, the controller 500 may include: a second circuit board 510, a third circuit board 520, a second battery 530, a magnetic terminal 540, a second bracket 550, a second housing 560, and a second clip 570; the magnetic terminal 540 is electrically connected with the second battery 530, the second battery 530 is mounted inside the second bracket 550, the second circuit board 510 and the third circuit board 520 are mounted on two sides of the second bracket 550, the second circuit board 510, the third circuit board 520, the second battery 530, the magnetic terminal 540 and the second bracket 550 are mounted inside the second shell 560, and the second clamping ring 570 is mounted outside the second shell 560. Wherein the second housing 560 includes a second top cover and a second bottom cover.

In the embodiment of the application, the second circuit board receives the upshift signal or the downshift signal and generates a corresponding driving signal, the third circuit board drives the steering engine or the motor to rotate by a corresponding angle according to the driving signal, the second circuit board and the third circuit board are powered by the second battery, the magnetic attraction terminal is connected with an external power supply to charge the second battery, the second circuit board and the third circuit board are fixed with the battery through the second support, and mounting holes for the second top cover and the second bottom cover are provided, a concave table (for example, a concave table with an axis inclined by 30 degrees) which is matched with the inner side of the top of the second top cover is arranged on the outer side of the top of the second support, so that the second support can be smoothly assembled into the second top cover, and a convex table and a mounting hole for connecting the second bottom cover are arranged on the outer side of the bottom of the second support; the second shell protects the internal components of the controller, the influence of the external environment on the internal components is reduced, two through holes with central axes inclined by 30 degrees relative to the wall surface of the second top cover are formed in the outer wall of the second top cover, bolts are inserted into the through holes and are used for being connected with the second support to fix the second support, and external liquid needs to flow into the through holes inclined by 30 degrees from bottom to top if entering the second shell, so that the structure can prevent water from entering the through holes due to rain splash to a certain degree; simultaneously, the second bottom provides the installation position of magnetism terminal of inhaling and crosses the line hole, and the second bottom is equipped with the thin wall of following the shape unanimity outward with the second top cap, and second top cap and second bottom assembly back because the effect of gravity, outside liquid need cross inside this thin wall could enter into the second shell, consequently, the intaking that can prevent that the rain from spattering and bringing of certain degree. On being fixed in bicycle seat pipe with the second shell through the second clamp ring, be equipped with the through-hole of being connected with the cooperation of second shell on the second clamp ring, can form the pivot behind the screw in bolt, when the locking bolt of the second clamp ring other end was not screwed in, can make the second clamp ring rotatory around the pivot, make things convenient for the dismouting.

Fig. 9 is a circuit diagram of a second circuit board and a third circuit board of a bicycle transmission provided by an embodiment of the present application, and as shown in fig. 9, the second circuit board 510 may exemplarily include a wireless receiving module 511 wirelessly connected with the shift button 400 and configured to wirelessly receive an upshift signal or a downshift signal; a control module 512 electrically connected to the wireless receiving module 511 and configured to output a driving signal according to the upshift signal or the downshift signal; and a voltage reduction module 513 electrically connected to the wireless receiving module 511 and the control module 512, and configured to supply power to the wireless receiving module 511 and the control module 512.

As shown in fig. 9, for example, the third circuit board 520 may include a steering engine control module 521, electrically connected to the control module 512, and configured to rotate the steering engine by a corresponding angle according to the driving signal; a motor control module 522 electrically connected to the control module 512 and configured to rotate the motor a corresponding number of turns according to the driving signal; a motor encoder 523 electrically connected to the motor control module 522 and the control module 512, and configured to feed back the current gear of the motor control module 522 to the control module 512 in real time; and the boost charging module 524 is electrically connected with the steering engine control module 521, the motor control module 522 and the motor encoder 523, and is configured to boost the output voltage of the second battery 530 and access an external charging power supply to supply power to the steering engine control module 521, the motor control module 522 and the motor encoder 523.

In the embodiment of the application, the wireless receiving module receives the upshift signal or the downshift signal sent by the wireless sending module, the control module generates the driving signal corresponding to the steering engine control module or the motor control module according to the upshift signal or the downshift signal, and the voltage reduction module provides stable 3.3V voltage for the wireless receiving module and the control module. The steering engine rotates by a corresponding angle according to the driving signal to drive the rear derailleur to move the bicycle chain to the other flywheel, the motor rotates by a corresponding number of turns according to the driving signal to drive the rear derailleur to move the bicycle chain to the other flywheel, and the motor encoder feeds back the current gear of the motor control module to the control module in real time so as to accurately adjust the rotating angle of the motor; the voltage of the 3.7V lithium battery is increased to 9V through the boost charging module, so that the VIN interface of the control module can be driven, and the torque of the motor is improved through high voltage. Outside 5VIN is the magnetism that is used for charging in the controller and inhales the terminal, can connect outside USB power, if charge precious etc to charge to the controller. Meanwhile, the driving signal output by the control module is a low-power PWM signal, and the steering engine or the motor cannot be directly driven, so that the steering engine or the motor receives the low-power PWM signal from the control module, and the power supply of the boosting charging module is adopted to drive the steering engine or the motor to rotate.

Fig. 10 is a flowchart of a control method of a bicycle transmission provided by an embodiment of the present application, and as shown in fig. 10, the control method of a bicycle transmission provided by an embodiment of the present application may include the steps of:

s1, reading the recorded initial gear of the gear shifting actuating mechanism;

s2, restoring the gear of the gear-shifting actuating mechanism to the initial gear;

s3, controlling the gear angle corresponding to the rotation of the gear shift executing mechanism according to the gear shift signal or the gear shift signal and the initial gear;

and S4, recording a new gear after the gear angle corresponding to the swing of the speed change actuating mechanism.

In the embodiment of the application, after an accident such as power failure occurs and in the process of initializing the restart controller, the memory (such as a read-only memory or an EEPROM) is used for acquiring gear data before power failure, the recorded initial gear of the speed change executing mechanism is read at first, and then the gear of the speed change executing mechanism is restored to the initial gear, so that after the restart is performed under some limit working conditions, the winch can still be maintained in the original position, and the winch is prevented from automatically returning to the initial position during initialization. The limit condition may include battery power exhaustion, accidental disconnection of the controller, or long-term non-use of the disconnected power supply.

Then, controlling the gear shift executing mechanism to rotate by a corresponding gear angle according to the upshift signal or the downshift signal in combination with the initial gear, and recording the current gear, wherein the method comprises the following steps of: judging whether the shift button is pressed for more than a first preset time, finely adjusting the position of the shift execution mechanism upwards or downwards according to an upshift signal or a downshift signal in combination with an initial gear when the shift button is pressed for more than the first preset time, and otherwise, judging whether the shift button is pressed for more than a second preset time; when the speed change button is pressed for more than a second preset duration, judging whether the gear of the speed change executing mechanism is in the highest gear or the lowest gear, and otherwise, keeping the gear unchanged; when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is in the highest gear or the lowest gear, keeping the gear unchanged; when the gear shift button is pressed for more than a second preset time and the gear of the gear shift execution mechanism is not in the highest gear or the lowest gear, the gear of the gear shift execution mechanism is increased by one gear or decreased by one gear according to the gear shift up signal or the gear shift down signal and the initial gear; and recording a new gear after the gear angle corresponding to the swing of the speed change actuating mechanism. The first preset time length is longer than the second preset time length.

In the embodiment of the application, a debugging mode is entered after a first preset time (for example, 5 seconds) is pressed for a long time to raise the gear, and the angle of the steering engine corresponding to the current gear can be increased in the debugging mode by pressing the gear-raising key for a short time (for example, 1-2 seconds); the steering engine angle corresponding to the current gear is reduced by short pressing (for example, 1-2 seconds) of the down-shift key. The debug mode is exited after a long press of the downshift key for a first preset duration (which may be 5 seconds, for example). The second preset time period may be 1-2 seconds. Through upwards or the position of fine setting variable speed actuating mechanism downwards, can provide the fine setting function for the steering wheel turned angle that each gear corresponds, guaranteed the commonality of this application. Because the steering wheel turned angle that different gears of different bicycles correspond may be different, when the fine setting function that provides the angle can make this application install on different bicycles, upwards or fine setting downwards steering wheel swing angle according to the effect of actual variable speed to obtain better variable speed effect.

The working process of the application is as follows: firstly, an upshift button or a downshift button of a speed change button is pressed, an upshift signal or a downshift signal is sent through a wireless sending module, a signal from the speed change button is received through a wireless receiving module, the wireless signal is converted into a switching value signal and is forwarded to a controller, the pressed button is judged to be the upshift button or the downshift button through the controller, next operation of a steering engine is judged to be increased, decreased or unchanged according to the current gear, after judgment is completed, the controller sends an execution command to the steering engine, an output shaft of the steering engine rotates to a specific angle and drives a winch to rotate, a speed change line is pulled for a certain distance, a bicycle chain is pushed to another flywheel of a bicycle speed changer through displacement of a rear derailleur, electronic speed change operation is achieved, the whole control device is low in cost and is suitable for modifying bicycles of a traditional mechanical speed change system, the application range is wide.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed bicycle shifter and method can be implemented in other ways. For example, the above-described bicycle transmission embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and additional divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.