CN113443068B - Speed change executing mechanism, bicycle speed changer and control method - Google Patents

Abstract

The application provides a speed change executing 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 speed change wire; the one end at output shaft place of steering wheel is located to the cavity support cover, and the output shaft passes behind the cavity support and is connected with the capstan winch to drive the capstan winch through the steering wheel output shaft and rotate, and then taut or loosen the last fixed variable speed line of capstan winch, realize electronic type variable speed, whole device cost is lower, and is applicable to the bicycle of repacking traditional mechanical type variable speed system, application scope is wide.

Description

Speed change executing mechanism, bicycle speed changer and control method

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 performs speed change operation through various mechanical structures such as gears, ratchets, winches and the like in a speed change operation mechanism, and the mechanical structure of mechanical speed change becomes complex and heavy along with the increase of bicycle gears, so that the problem of reliability reduction is brought; meanwhile, due to the fact that the gear shifting wires are wound in multiple circles, the problem of fatigue fracture of the gear shifting wires is likely to occur in mechanical gear shifting.

At present, some manufacturers adopt an electronic speed change system, remove the speed change line of the traditional speed change mechanical system, 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 change device, and needs to completely replace the traditional mechanical speed change system on a bicycle, so that the cost is high.

Disclosure of Invention

The invention 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 speed change actuator, including a steering engine, a hollow bracket, and a winch to which a speed change wire is fixed;

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

In another possible implementation manner of the first aspect, the gear shift actuator further includes a friction spring and a clamping member;

the friction elastic sheet is arranged on the hollow bracket 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 transmission 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 speed change button and the speed change executing mechanism and is configured to control the speed change executing mechanism to carry out the up-shift operation or the down-shift operation according to the up-shift signal or the down-shift signal.

In another possible implementation manner of the second aspect, the shift button includes a first circuit board, a first bracket, a first battery, a first housing, and a first clamp 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 implementation manner of the second aspect, the first circuit board includes:

a push button switch configured to acquire an upshift signal or a downshift signal according to the high and low levels;

a wireless transmission module electrically connected to the push 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 transmission module.

In another possible implementation manner of the second aspect, the controller includes a second circuit board, a third circuit board, a second battery, a magnetic terminal, a second bracket, a second housing, and a second clamping ring;

the second battery is electrically connected with the magnetic attraction terminal, 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 attraction terminal and the second support are installed inside the second housing, and the second clamping ring is installed outside the second housing.

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

a wireless receiving module, which is wirelessly connected with the speed change button and is configured to wirelessly receive the upshift signal or the downshift signal;

a control module electrically connected to the wireless receiving module and configured to output a driving signal according to the upshift signal or the downshift signal;

and the voltage reducing module is electrically connected with the wireless receiving module and the control module and is configured to supply power to the wireless receiving module and the control module.

In another possible implementation manner 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 enable the steering engine to rotate by a corresponding angle according to the driving signal;

the motor control module is electrically connected with the control module and is configured to enable the motor to rotate for corresponding 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 charging module is electrically connected with the steering engine 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 steering engine control module, the motor control module and the motor encoder.

In a third aspect, an embodiment of the present application provides a method for controlling a bicycle derailleur, comprising the steps of:

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

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

controlling the speed change executing mechanism to rotate by a corresponding gear angle according to the upshift signal or the downshift signal and combining with the initial gear;

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

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

when the speed change button is pressed for more than a first preset time period, the position of the speed change executing mechanism is finely adjusted upwards or downwards according to the upshift signal or the downshift signal and combined with the initial gear;

when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is at the highest gear or the lowest gear, keeping the gear unchanged;

when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is not in the highest gear or the lowest gear, the gear of the speed change executing mechanism is increased by one gear or decreased by one gear according to the upshift signal or the downshift signal in combination with the initial gear;

the first preset time period is longer than the second preset time period.

Compared with the prior art, the embodiment of the application has the beneficial effects that: the speed change actuating mechanism drives the winch to rotate through the steering engine output shaft, and then tightens or loosens a speed change wire fixed on the winch, electronic speed change is achieved, the whole device is a refitted suite, and the speed change actuating mechanism can be directly installed on a bicycle adopting a traditional mechanical speed change system, and is matched with the bicycle for use, so that the cost is low.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is an exploded view of a shift actuator provided in an embodiment of the present application;

FIG. 3 (a) is a schematic diagram of a first configuration of a winch for a transmission actuator according to an embodiment of the present application;

FIG. 3 (b) is a schematic diagram of a second configuration of a winch for a transmission actuator according to an embodiment of the present application;

FIG. 4 is a schematic structural view of a shift button of a bicycle derailleur provided in an embodiment of the present application;

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

FIG. 6 is a circuit diagram of a first circuit board of a bicycle derailleur provided in an embodiment of the present application;

FIG. 7 is a schematic structural view of a controller for a bicycle derailleur according to an embodiment of the present application;

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

FIG. 9 is a circuit diagram of a second and third circuit board of a bicycle derailleur provided in an embodiment of the present application;

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

Reference numerals illustrate:

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

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, 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 for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" 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 is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

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

The existing electronic speed-changing system of the bicycle is high in selling price and cost because the traditional speed-changing wire of the mechanical speed-changing system is removed and the electronic control unit is directly utilized to replace a complex mechanical structure, so that the electronic speed-changing system cannot be popularized to a common bicycle; meanwhile, the electronic speed changing system on the market is mainly a whole set of speed changing suite, and the traditional mechanical speed changing system on the bicycle needs to be completely replaced, so that the cost is high.

For this reason, this application provides a speed change actuating mechanism, adopts cavity leg joint steering wheel and capstan winch to drive the capstan winch through the steering wheel output shaft and rotate, and then taut or loosen the last fixed variable speed line of capstan winch, make bicycle derailleur rear derailleur take place the displacement, stir bicycle chain to on another flywheel of bicycle derailleur, realize electronic type speed change and the cost is lower, be applicable to the bicycle of repacking traditional mechanical type speed change system simultaneously.

The following is an exemplary description of the shift actuator provided in this application, taken in conjunction with the accompanying drawings:

fig. 1 is a schematic structural diagram of a gear shifting actuator provided in an embodiment of the present application, as shown in fig. 1, and for convenience of explanation, only the portions related to the embodiment are shown, and detailed below: illustratively, it may include: steering engine 100, hollow bracket 200 and winch 300 with fixed gear line; the hollow bracket 200 is sleeved at one end of the steering engine 100 where the output shaft is located, and the output shaft penetrates through the hollow bracket 200 and is connected with the winch 300.

In this application embodiment, rotate through the output shaft of steering wheel and drive the capstan winch and rotate, rotate through driving the capstan winch and make the variable speed line of fixing on the capstan winch taut or relax to make bicycle derailleur rear derailleur take place the displacement, stir bicycle chain to another piece flywheel of bicycle derailleur, realize electronic type variable speed. Meanwhile, a steering engine mounting hole, a friction spring piece mounting position and a wire passing seat of the speed-change wire tube are arranged on the hollow support. The radius of the winch can be adjusted according to actual conditions (for example, the radius can be 10 mm), and the tooth shape of the teeth on the winch is saw-tooth.

Fig. 2 is an exploded view of the gear shifting actuator according to the embodiment of the present application, fig. 3 (a) is a first structural schematic diagram of the winch of the gear shifting actuator according to the embodiment of the present application, and fig. 3 (b) is a second structural schematic diagram of the winch of the gear shifting actuator according to the embodiment of the present application; as shown in fig. 2, 3 (a), and 3 (b), the gear shift actuator may further include a friction spring 301 and a clamping member 101, for example; the friction spring 301 is mounted on the hollow bracket 200 and is meshed with the teeth of the winch 300, and the clamping piece 101 is mounted 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 moment, can prevent that the capstan winch from being pulled back by the return moment of rear derailleur and causing the reversal. Meanwhile, the friction force caused by the friction spring plate can be modified by modifying the thickness of the friction spring plate. The friction spring plate can comprise arc-shaped bulges or zigzag-shaped bulges, when the bulges of the friction spring plate are arc-shaped, the teeth of the winch are arc-shaped teeth meshed with each other, the bulges have less abrasion on the winch and the friction spring plate, but the friction spring plate is nondirectional, and the same friction force can be generated during upshifting and downshifting. When the bulge of the friction spring plate is in a zigzag shape, the teeth of the winch are zigzag teeth meshed with each other, the inclined plane angle in the upshift direction is smaller, and the inclined plane angle in the downshift direction is larger, so that smaller friction force is brought in the upshift direction, and larger friction force is brought in the downshift direction. The shift actuator is mounted to the bicycle shifter by a clamp.

The speed change actuating mechanism can be refitted to various existing bicycles using a traditional mechanical speed change system, the speed change debugging threshold of the bicycle is reduced, a rider does not need to master the wire pulling ratio of the speed changer, the speed change up and down limiting, the rear shifting speed change stroke and other debugging processes, the speed change system can be automatically debugged, the response time of the speed change system can be reduced, and the speed change accuracy is improved.

Fig. 4 is a schematic structural view of a shift button of a bicycle transmission according to an embodiment of the present application, and fig. 7 is a schematic structural view of a controller of a bicycle transmission according to an embodiment of the present application, as shown in fig. 4 and fig. 7, and exemplary, the embodiment of the present application provides a bicycle transmission, which may include: a shift actuator, and a shift button 400 configured to acquire an upshift signal or a downshift signal; the controller 500, electrically connected to the shift button 400 and the shift actuator, is 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 upshift signal or the downshift signal of the user is obtained through the speed change button, and the speed change executing mechanism is controlled to carry out upshift operation or downshift operation through the controller according to the upshift signal or the downshift signal, so that the adjustment of the speed gear of the bicycle can be completed directly through electronic signal transmission without mechanical braking.

FIG. 5 is an exploded view of a shift button of a bicycle transmission provided in an embodiment of the present application, 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 housing 440, and a first clamping ring 450; the first circuit board 410 and the first battery 430 are mounted on 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 housing 440, and the clamping ring 450 is mounted outside the first housing 440.

In the embodiment of the application, the upshift requirement or the downshift requirement of the user is acquired through the first circuit board; the first circuit board is connected with the first battery through the first bracket, and a mounting hole for connecting the first shell is provided, so that a gap between the printed circuit board and the wireless transmission 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 through 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 consistent with the outer edge of the top cover, and after the top cover and the bottom cover are assembled, external liquid can enter the shell through the thin wall under the action of gravity. Therefore, this structure can prevent to a certain extent that the rain splashes the water that brings, in order to guarantee that the shell has certain waterproof dustproof ability simultaneously, will annotate the waterproof glue in each hole department of shell after the assembly is accomplished, keeps tact switch still work when preventing to intaking. The speed change button is arranged on a bicycle handlebar through the first clamping ring, the first clamping ring comprises a first upper clamping ring and a first lower clamping ring, the adjacent ends of the first upper clamping ring and the first lower clamping ring are respectively provided with a through hole matched with each other, a rotating shaft is formed after the bolts are inserted, the first upper clamping ring can rotate around the rotating shaft, the installation is convenient, the other ends of the first upper clamping ring and the first lower clamping ring are respectively provided with a hole capable of being provided with a locking bolt, the first clamping ring can be locked after the first clamping ring is matched with the handlebar, so that the speed change button is fixed on the bicycle handlebar, and simultaneously, the two ends of the first lower clamping ring are also provided with holes connected with the first shell and fixedly connected with the first shell through bolts.

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, the first circuit board 410 can include: a push button 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 push button switch 411 and configured to wirelessly transmit an upshift signal or a downshift signal; the battery interface 413 is electrically connected to the push switch 411 and the wireless transmission module 412.

In this embodiment, the upshift signal or the downshift signal is obtained according to the high-low level through the button switch, for example, the button switch may include an upshift button and a downshift button, and after being pressed, the upshift signal and the downshift signal are respectively output, the level states of the upshift button and the downshift button are monitored through the wireless transmission module, and when the pin level of the upshift button or the downshift button is monitored to change, the corresponding upshift signal or the downshift signal is sent to the wireless receiving module, and the battery power supply or the external power supply is connected through the battery interface, so as to supply power to the button switch and the wireless transmission module.

FIG. 8 is an exploded view of a controller for a bicycle transmission provided in an embodiment of the present application, as shown in FIG. 8, 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 holder 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 housing 560, and the second clamping ring 570 is mounted outside the second housing 560. Wherein the second housing 560 includes a second top cover and a second bottom cover.

In the embodiment of the application, an upshift signal or a downshift signal is received through a second circuit board, a corresponding driving signal is generated, a steering engine or a motor is driven to rotate by a corresponding angle through a third circuit board according to the driving signal, the second circuit board and the third circuit board are powered by a second battery, an external power supply is connected through a magnetic terminal to charge the second battery, the second circuit board, the third circuit board and the battery are fixed through a second bracket, mounting holes are formed in the second bracket and the second top cover and the second bottom cover, a concave table (for example, a concave table with an axis inclined by 30 degrees) 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 bracket, so that the second bracket can be smoothly assembled into the second top cover, and a boss and the mounting hole for connecting the second bottom cover are formed on the outer side of the second bracket; the second shell is used for protecting the internal components of the controller, the influence of the external environment on the internal components is reduced, two through holes with the 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, after bolts are inserted, the through holes are used for being connected with the second support, the second support is fixed, and if external liquid needs to enter the second shell, the external liquid needs to flow into the through holes inclined by 30 degrees from bottom to top, so that the structure can prevent water from entering caused by rain and splash to a certain extent; meanwhile, the second bottom cover provides a mounting position and a wire passing hole of the magnetic terminal, the second bottom cover is provided with a thin wall which is consistent with the outer edge shape of the second top cover, and after the second top cover and the second bottom cover are assembled, external liquid can enter the second housing only by crossing the thin wall under the action of gravity, so that water entering caused by rain splashing can be prevented to a certain extent. The second outer shell is fixed on the bicycle seat tube through the second clamping ring, the second clamping ring is provided with a through hole which is connected with the second outer shell in a matched mode, a rotating shaft can be formed after the bolt is screwed in, and when the locking bolt at the other end of the second clamping ring is not screwed in, the second clamping ring can rotate around the rotating shaft, so that the bicycle seat tube is convenient to assemble and disassemble.

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

As shown in fig. 9, the third circuit board 520 may illustratively 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; the boost charging module 524 is electrically connected to 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 source 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 step-down 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, so that the rear derailleur is driven to move the bicycle chain to the other flywheel, the motor rotates by a corresponding number of turns according to the driving signal, so that the rear derailleur is driven to move the bicycle chain to the other flywheel, and the current gear of the motor control module is fed back to the control module in real time through the motor encoder, so that the rotation angle of the motor can be accurately adjusted; 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 increased through high voltage. The external 5VIN is a magnetic terminal used for charging in the controller, and can be connected with an external USB power source, such as a charger, so as to charge 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 and charging module is adopted to supply power to drive the steering engine or the motor to rotate.

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

s1, reading the recorded initial gear of the speed change executing mechanism;

s2, restoring the gear of the speed change executing mechanism to an initial gear;

s3, controlling the speed change executing mechanism to rotate by a corresponding gear angle according to the upshift signal or the downshift signal and combining with the initial gear;

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

In the embodiment of the application, after the occurrence of unexpected situations such as power failure, etc., in the process of restarting the controller, the storage (for example, read only memory, EEPROM) is utilized to acquire the gear data before power failure, firstly, the recorded initial gear of the speed change executing mechanism is read, and then the gear of the speed change executing mechanism is restored to the initial gear, so that after restarting under some limiting working conditions, the winch can still be maintained in situ, and the winch is prevented from automatically returning to the initial position during the initialization. The limit working conditions can include the conditions of battery power exhaustion, accidental disconnection of the controller or long-term non-use of a disconnected power supply.

Then, according to the upshift signal or the downshift signal and combining with the initial gear, the speed change executing mechanism is controlled to rotate by the corresponding gear angle, and the current gear is recorded, which comprises the following steps: judging whether the speed change button is pressed for more than a first preset time period, when the speed change button is pressed for more than the first preset time period, finely adjusting the position of the speed change executing mechanism upwards or downwards according to an upshift signal or a downshift signal in combination with an initial gear, otherwise, judging whether the speed change button is pressed for more than a second preset time period; when the speed change button is pressed for more than a second preset time period, judging whether the gear of the speed change executing mechanism is at the highest gear or the lowest gear, otherwise, keeping the gear unchanged; when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is at the highest gear or the lowest gear, keeping the gear unchanged; when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is not in the highest gear or the lowest gear, the gear of the speed change executing mechanism is increased by one gear or decreased by one gear according to the upshift signal or the downshift 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. Wherein the first preset time period is longer than the second preset time period.

In the embodiment of the application, after the upshift key is pressed for a long time for a first preset time period (for example, 5 seconds), the debugging mode is started, and in the debugging mode, the steering engine angle corresponding to the current gear can be increased by pressing the upshift key for a short time (for example, 1-2 seconds); and the steering engine angle corresponding to the current gear is reduced by pressing a downshift key for a short time (for example, 1-2 seconds). The debug mode is exited after a first preset duration (which may be, for example, 5 seconds) of downshift key is pressed. Wherein the second preset time period may be 1-2 seconds. Through the position of the speed change actuating mechanism of fine tuning upwards or downwards, the fine tuning function can be provided for steering engine rotation angles corresponding to each gear, and the universality of the application is guaranteed. Because steering wheel turned angle that different gears of different bicycles correspond probably is different, when providing the fine setting function of angle and enabling this application to install on different bicycles, according to the effect of actual variable speed with steering wheel swing angle upwards or fine setting downwards 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, the next operation of a steering engine is judged to be the increase of a rotation angle, the decrease of the rotation angle or the maintenance of the rotation angle by combining with the current gear, after the 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, and meanwhile, a speed change line is pulled for a certain distance, so that a bicycle chain is shifted to another flywheel of the bicycle speed change through the displacement of a rear derailleur, the whole control device is low in cost and suitable for modifying a bicycle of a traditional mechanical speed change system, and the application range is wide.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a 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 process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

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 solution. 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 herein, it should be understood that the disclosed bicycle derailleur and method can be implemented in other ways. For example, the bicycle transmission embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (7)

1. A speed change 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 speed change wire;

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

the speed change executing mechanism further comprises a friction elastic sheet and a clamping piece;

the friction elastic sheet is arranged on the hollow bracket and meshed with the teeth of the winch, the clamping piece is arranged on the outer side of the steering engine, and the torque generated by the friction elastic sheet is larger than the return torque of the rear derailleur and smaller than the output torque of the steering engine;

the friction elastic sheet comprises a circular arc-shaped bulge or a zigzag bulge, and when the friction elastic sheet comprises the circular arc-shaped bulge, the teeth of the winch are circular arc-shaped teeth meshed with each other, so that the same friction force is generated during upshifting and downshifting; when the friction spring plate comprises the zigzag protrusions, the teeth of the winch are the zigzag teeth meshed with each other, so that different friction forces are generated during upshifting and downshifting, the inclined plane angle of the zigzag protrusions in the upshifting direction is smaller than that in the downshifting direction, and the friction force generated by the zigzag protrusions in the upshifting direction is smaller than that generated in the downshifting direction.

2. A bicycle transmission comprising the shift actuator of claim 1, and

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

a controller electrically connected to the shift button 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;

the speed change button comprises a first circuit board, a first bracket, a first battery, a first shell and a first clamping 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.

3. The bicycle shifter of claim 2, wherein the first circuit board comprises:

a push button switch configured to acquire an upshift signal or a downshift signal according to the high and low levels;

a wireless transmission module electrically connected to the push 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 transmission module.

4. The bicycle shifter of claim 2, wherein the controller includes a second circuit board, a third circuit board, a second battery, a magnetic terminal, a second bracket, a second housing and a second clamp ring, the magnetic terminal electrically connecting the second battery, the second battery being mounted inside the second bracket, the second circuit board and the third circuit board being mounted on both sides of the second bracket, the second circuit board, the third circuit board, the second battery, the magnetic terminal and the second bracket being mounted inside the second housing, the second clamp ring being mounted outside the second housing.

5. The bicycle shifter of claim 4, wherein the second circuit board comprises:

a wireless receiving module, which is wirelessly connected with the speed change button and is configured to wirelessly receive the upshift signal or the downshift signal;

a control module electrically connected to the wireless receiving module and configured to output a driving signal according to the upshift signal or the downshift signal;

and the voltage reducing module is electrically connected with the wireless receiving module and the control module and is configured to supply power to the wireless receiving module and the control module.

6. The bicycle shifter of claim 5, wherein the third circuit board comprises:

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

the motor control module is electrically connected with the control module and is configured to enable the motor to rotate for corresponding 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 charging module is electrically connected with the steering engine 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 steering engine control module, the motor control module and the motor encoder.

7. A method of controlling a bicycle derailleur according to any one of claims 2 to 6, comprising the steps of:

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

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

controlling the speed change executing mechanism to rotate by a corresponding gear angle according to the upshift signal or the downshift signal and combining with the initial gear;

recording a new gear after the gear angle corresponding to the swing of the speed change executing mechanism;

the step-up signal or step-down signal is combined with the initial gear to control the speed change executing mechanism to rotate by a corresponding gear angle, and the step-up signal or step-down signal comprises the following steps:

when the speed change button is pressed for more than a first preset time period, the position of the speed change executing mechanism is finely adjusted upwards or downwards according to the upshift signal or the downshift signal and combined with the initial gear;

when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is at the highest gear or the lowest gear, keeping the gear unchanged;

when the speed change button is pressed for more than a second preset time period and the gear of the speed change executing mechanism is not in the highest gear or the lowest gear, the gear of the speed change executing mechanism is increased by one gear or decreased by one gear according to the upshift signal or the downshift signal in combination with the initial gear;

the first preset time period is longer than the second preset time period.

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