Self-adaptive speed change control system, bicycle and bicycle speed change system

Abstract

The utility model discloses a self-adaptive variable-speed control system, a bicycle and a bicycle variable-speed system.By arranging a torque detection unit and a pedaling frequency detection unit, output torque and pedaling frequency can be obtained, then the riding state of a rider can be determined, meanwhile, a variable-speed controller is connected to a flywheel variable-speed device, and therefore the riding state of the rider can be determined. Therefore, the variable speed controller has the capability of controlling the flywheel speed change device to shift gears so as to achieve the purpose of adjusting the flywheel gears, and moreover, the riding state of a rider can be determined by utilizing the output torque and the pedaling frequency, so that the self-adaptive adjustment of the flywheel gears can be completed in the riding process of the rider, and the riding experience of the rider is improved. A rider can be in a comfortable state or a state expected by the rider as much as possible in the riding process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bicycles, in particular to an adaptive gear shifting control system, a bicycle and a bicycle gear shifting system. BACKGROUND

[0002] At present, the gear shifting means of the gear shifting bicycle is mainly manual gear shifting. During the riding process, the rider needs to judge when to shift gears according to his own experience in the face of road condition changes and riding speed adjustments. However, this requires a high level of experience for the rider, and novice riders often have difficulty accurately determining the timing of gear shifting. Improper gear shifting timing not only causes a sense of stagnation during riding, increases physical exertion, and seriously affects the user's riding experience, but also hinders the smooth riding of novice users, to a large extent, hinders the popularization of the gear shifting bicycle and limits its application in a wider population. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide an adaptive gear shifting control system, a bicycle and a bicycle gear shifting system, which can improve the riding efficiency of the bicycle rider.

[0004] The adaptive gear shifting control system according to the first aspect of the present application comprises:

[0005] a torque detection unit for detecting the output torque of human pedaling;

[0006] a pedaling frequency detection unit for detecting the pedaling frequency of the human pedaling crank;

[0007] a gear shifting controller electrically connected to the torque detection unit and the pedaling frequency detection unit; the gear shifting controller is also electrically connected to the freewheel gear shifting device of the bicycle.

[0008] The bicycle gear shifting system according to the second aspect of the present application comprises:

[0009] the adaptive gear shifting control system according to the first aspect;

[0010] a freewheel gear shifting device connected to the gear shifting controller for adjusting the gear position of the freewheel.

[0011] The bicycle according to the third aspect of the present application comprises the adaptive gear shifting control system according to the first aspect.

[0012] The adaptive speed control system, the bicycle and the bicycle speed change system provided by the embodiments of the present application can obtain the output torque and the pedaling frequency through the torque detection unit and the pedaling frequency detection unit, and then determine the riding state of the rider. Meanwhile, the speed control device is connected to the freewheel speed change device, so that the speed control device has the ability to control the gear shifting of the freewheel speed change device, so as to achieve the purpose of adjusting the freewheel gear position. Moreover, the output torque and the pedaling frequency can be used to determine the riding state of the rider, so that the adaptive adjustment of the freewheel gear position can be completed during the rider's riding process, so that the rider can be in a more comfortable state or the state expected by the rider as much as possible during the riding process.

[0013] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 An electrical system diagram of the adaptive speed control system provided by the embodiments of the present application;

[0016] Figure 2 A schematic diagram of the overall structure of the tooth disc moving mechanism provided by the embodiments of the present application;

[0017] Figure 3 A partial sectional view of the tooth disc moving mechanism provided by the embodiments of the present application;

[0018] Figure 4 An electrical system diagram of the tooth disc moving mechanism provided by the embodiments of the present application.

[0019] Reference Signs:

[0020] First bearing 110; second bearing 120; axial locking structure 130; first locking plug 140; first sealing ring 150; second locking plug 160; second sealing ring 170;

[0021] Middle shaft 200;

[0022] Shaft sleeve 300;

[0023] Electric drive mechanism 410; drive motor 411; speed reducer 412; electric control module 413; wireless communication module 414; power storage module 415; drive lead screw 420; moving part 430;

[0024] Assembly seat 500;

[0025] Frame 600;

[0026] Crankset 700;

[0027] Crankshaft connecting shaft 800;

[0028] Flywheel 900;

[0029] Torque detection unit 1010; cadence detection unit 1020; speed controller 1030; human-machine interaction unit 1040; lactic acid detection device 1050; heart rate detection device 1060; blood pressure detection device 1070. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0032] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] In the description of this application, it should be noted that, unless otherwise explicitly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0034] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this application, not all embodiments.

[0035] See Figure 1 As shown, an embodiment of this application provides an adaptive transmission control system, which includes:

[0036] The torque detection unit 1010 is used to detect the output torque of human stepping.

[0037] The cadence detection unit 1020 is used to detect the cadence of a human pedaling the crank.

[0038] The variable speed controller 1030 is electrically connected to the torque detection unit 1010 and the pedaling frequency detection unit 1020 respectively, and is also used for electrically connecting the freewheel variable speed device of the bicycle.

[0039] In the embodiment, the torque detection unit 1010 and the pedaling frequency detection unit 1020 are arranged to obtain the output torque and the pedaling frequency, and then the riding state of the rider can be determined. Meanwhile, the variable speed controller 1030 is connected to the freewheel variable speed device, so that the variable speed controller 1030 has the ability to control the gear shifting of the freewheel variable speed device, to achieve the purpose of adjusting the gear position of the freewheel 900. Moreover, the output torque and the pedaling frequency can be used to determine the riding state of the rider, so that the adaptive adjustment of the gear position of the freewheel 900 can be completed during the riding process of the rider, so that the rider can be in a more comfortable state or the expected state as much as possible during the riding process.

[0040] The torque detection unit 1010 can be a torque sensor, a stress sensor, etc., which can be installed on the crank, the intermediate shaft, etc., to achieve the torque formed by the rider pedaling the crank.

[0041] The pedaling frequency detection unit 1020 can be a pressure sensor, an angular velocity sensor, an optical sensor, a contact sensor, etc., which can directly detect the rotation frequency of the crank, the chainring, etc., to determine the pedaling frequency of the rider.

[0042] After the variable speed controller 1030 is electrically connected to the torque detection unit 1010 and the pedaling frequency detection unit 1020, the output torque collected by the torque detection unit 1010 and the pedaling frequency collected by the pedaling frequency detection unit 1020 can be directly obtained.

[0043] After the variable speed controller 1030 is electrically connected to the freewheel variable speed device of the bicycle, the variable speed controller 1030 can control the freewheel variable speed device to complete the adjustment of the gear position of the freewheel 900.

[0044] The freewheel variable speed device can directly use the mature electric freewheel variable speed mechanism on the market for controlling the gear shifting of the freewheel 900, or other forms of freewheel 900 variable speed mechanism that can be controlled by the variable speed controller 1030. For example, the common electric freewheel variable speed mechanism can start the gear shifting operation by giving a simple control instruction.

[0045] It should be noted that the torque can reflect the force state of the rider when riding, and generally the more forceful, the greater the torque, and the pedaling frequency can directly reflect the speed of the rider pedaling the pedal, and generally the faster the speed, the more effort, based on the foregoing principle, the current riding state of the rider can be effectively determined by comprehensively considering the torque and pedaling frequency, and then when the human body is determined to be laborious, the sprocket 900 is controlled to be shifted up, and when it is too easy, the sprocket 900 is controlled to be shifted down. How to determine the riding state by using torque and pedaling frequency can be more specific, for example, the product of torque and pedaling frequency can be directly used, and based on the product and the pre-set threshold or threshold range, it can be determined whether it is in a more ideal riding state, for example, the product is greater than the pre-set threshold or threshold range, and the sprocket is shifted up, and the product is less than the pre-set threshold or threshold range, and the sprocket is shifted down. Of course, a weight factor can be further introduced to perform a weighted operation on the torque and the pedaling frequency, so that in some scenarios, a better calculation value (the product can be understood as the calculation value) for the pre-set threshold or threshold range for determination can be obtained, and then the calculation value and the pre-set threshold or threshold range are used to complete the determination. There are many specific ways that can be used, and the user can choose according to actual needs.

[0046] In some embodiments, with reference to Figure 1 The adaptive gear shifting control system further comprises:

[0047] The human-computer interaction unit 1040 is in communication connection with the gear shifting controller 1030.

[0048] In the embodiment, further considering that the physical qualities of individuals are different, and the bicycle can be used by multiple people, the human-computer interaction unit 1040 can be added to adjust the pre-set threshold or threshold range, so as to better meet the use requirements of different riders.

[0049] It should be noted that in the case of other intelligent terminals, the rider can also transmit the instruction for modifying the pre-set threshold or threshold range to the gear shifting controller 1030 through other intelligent terminals to complete the adjustment of the pre-set threshold or threshold range.

[0050] In some embodiments, the torque detection unit 1010 is arranged on the crank and / or the chainring 700 and / or the middle shaft 200; and / or,

[0051] The pedaling frequency detection unit 1020 is arranged on the crank and / or the chainring 700 and / or the middle shaft 200.

[0052] The torque detection unit 1010 can be arranged on the crank, the chainring 700, or the middle shaft 200, and theoretically can achieve detection of the torque. Although the values directly detected by the torque detection unit 1010 arranged at different positions can be different, the values can be preprocessed by simple mathematical operations to obtain the output torque formed by the rider pedaling the pedal.

[0053] The torque detection unit 1010 can include a plurality of torque sensors. In this case, the torque sensors can be arranged at multiple positions of the crank, the chainring 700, and the middle shaft 200. Subsequently, mean value calculation can be performed after normalization processing to obtain the torque closest to the true torque and eliminate errors caused by a single sensor.

[0054] The torque detection unit 1010 can be arranged on the crank, the chainring 700, or the middle shaft 200, and theoretically can achieve detection of the torque. Although the values directly detected by the torque detection unit 1010 arranged at different positions can be different, the values can be preprocessed by simple mathematical operations to obtain the output torque formed by the rider pedaling the pedal.

[0055] The pedal frequency detection unit 1020 can include a plurality of pedal frequency sensors. In this case, the pedal frequency sensors can be arranged at multiple positions of the crank, the chainring 700, and the middle shaft 200. Subsequently, mean value calculation can be performed after normalization processing to obtain the pedal frequency closest to the true pedal frequency and eliminate errors caused by a single sensor.

[0056] In some embodiments, with reference to Figure 1 The shift controller 1030 is further configured to be communicatively connected to the chainring moving mechanism, and the chainring moving mechanism is configured to drive the chainring 700 to move axially along the middle shaft 200.

[0057] In this embodiment, the chainring moving mechanism is further considered to drive the chainring 700 to move axially along the middle shaft 200. Therefore, before or after or at the same time as the shift controller 1030 controls the freewheel shift device to complete gear shifting, the chainring 700 can be controlled to move axially along the middle shaft 200, so that the angle between the chain and the chainring 700 can be reduced as much as possible after the freewheel 900 shifts, thereby improving the riding experience of the rider to the greatest extent.

[0058] In some embodiments, with reference to Figure 1 The adaptive shift control system further includes:

[0059] The lactate detection device 1050 is communicatively connected to the shift controller 1030 and is configured to detect the lactate of the human body.

[0060] In this embodiment, considering that the state of lactic acid can effectively reflect the function state of the human body, a lactic acid detection device 1050 is introduced to detect the lactic acid of the rider, so that the gear can be lowered in time to avoid injury to the rider when there is more lactic acid.

[0061] In addition, the lactic acid detected by the lactic acid detection device 1050 can also be comprehensively considered with the aforementioned acquired cadence and torque, for example, the product of the three, and the calculation value calculated by the weighted calculation of the three, etc. can be used for gear control, and the specific control mode can refer to the aforementioned cadence and torque control mode.

[0062] The aforementioned lactic acid detection device 1050 can adopt a mature lactic acid detection device 1050 on the market.

[0063] In some embodiments, referring to Figure 1 , the adaptive gear shifting control system further comprises:

[0064] The heart rate detection device 1060 is in communication connection with the gear shifting controller 1030, and is used for detecting the heart rate of the human body.

[0065] In this embodiment, considering that the state of heart rate can effectively reflect the function state of the human body, a heart rate detection device 1060 is introduced to detect the heart rate of the rider, so that the gear can be lowered in time to avoid injury to the rider when the heart rate is too high.

[0066] In addition, the heart rate detected by the heart rate detection device 1060 can also be comprehensively considered with the aforementioned acquired cadence and torque, for example, the product of the three, and the calculation value calculated by the weighted calculation of the three, etc. can be used for gear control, and the specific control mode can refer to the aforementioned cadence and torque control mode.

[0067] In some embodiments, referring to Figure 1 , the adaptive gear shifting control system further comprises:

[0068] The blood pressure detection device 1070 is in communication connection with the gear shifting controller 1030, and is used for detecting the blood pressure of the human body.

[0069] In this embodiment, considering that the state of blood pressure can effectively reflect the function state of the human body, a blood pressure detection device 1070 is introduced to detect the blood pressure of the rider, so that the gear can be lowered in time to avoid injury to the rider when the blood pressure is too high.

[0070] In addition, the heart rate detected by the blood pressure detection device 1070 can also be comprehensively considered with the aforementioned acquired cadence and torque, for example, the product of the three, and the calculation value calculated by the weighted calculation of the three, etc. can be used for gear control, and the specific control mode can refer to the aforementioned cadence and torque control mode.

[0071] It should be noted that the lactic acid, heart rate, and blood pressure can be selectively combined with the pedaling frequency and torque according to actual needs, one of them can be combined with the pedaling frequency and torque, or multiple parameters can be selected, when multiple parameters are selected, the multiple parameters can be comprehensively considered with the pedaling frequency and torque obtained in the foregoing, for example, the product of all selected parameters, and the result of the weighted calculation of all selected parameters, etc. The calculated value is used to control the gear position, and the specific control mode can refer to the foregoing pedaling frequency and torque control mode.

[0072] In some embodiments, the lactic acid detection device 1050, the heart rate detection device 1060, and the blood pressure detection device 1070 can be arranged on the smart wearable device, and the collected data can be transmitted to the speed control device 1030 through the smart wearable device through wireless communication.

[0073] In some embodiments, the lactic acid detection device 1050, the heart rate detection device 1060, and the blood pressure detection device 1070 can be arranged on the smart wearable device, and the collected data can be transmitted to the speed control device 1030 through the smart wearable device through wireless communication.

[0074] Referring to Figures 2 to 4 The bicycle speed change system provided by an embodiment of the present application includes:

[0075] The adaptive speed change control system as described above;

[0076] The freewheel speed change device is connected with the speed control device 1030 and is used to adjust the gear position of the freewheel 900.

[0077] The bicycle speed change system in the embodiment includes the adaptive speed change control system as described above, and thus has the beneficial effects of the adaptive speed change control system as described above, which will not be described here.

[0078] In some embodiments, the bicycle speed change system further includes:

[0079] The tooth disc moving mechanism is in communication connection with the speed control device 1030, and is used to drive the tooth disc 700 to move axially along the central shaft 200.

[0080] In the embodiment, the tooth disc moving mechanism is further considered to drive the tooth disc 700 to move axially along the central shaft 200, so that the speed control device 1030 controls the tooth disc 700 to move axially along the central shaft 200 before or after or at the same time as the freewheel speed change device completes the gear position change, so that the angle between the chain and the tooth disc 700 can be reduced as much as possible after the freewheel 900 changes the gear position, so as to improve the riding experience of the rider to the greatest extent. In some embodiments, the lactic acid detection device 1050, the heart rate detection device 1060, and the blood pressure detection device 1070 can be arranged on the smart wearable device, and the collected data can be transmitted to the speed control device 1030 through the smart wearable device through wireless communication.

[0081] It can be understood that the above-mentioned tooth disc 700 can be axially moved along the middle shaft 200, which indicates that a space for the tooth disc 700 to move is reserved on the middle shaft 200.

[0082] The above-mentioned tooth disc moving mechanism can realize many ways of driving the tooth disc 700 to move axially along the middle shaft 200. For example, the tooth disc moving mechanism can include a shaft sleeve 300, a telescopic mechanism, and an electrically controlled driving unit. The shaft sleeve 300 is sleeved on the middle shaft 200 and can move axially along the middle shaft 200, and the shaft sleeve 300 is relatively fixed with the middle shaft 200 in the circumferential direction of the middle shaft 200. The tooth disc 700 is arranged on the shaft sleeve 300. The telescopic mechanism is located outside the middle shaft 200 and is connected to the shaft sleeve 300 and / or the tooth disc 700. The electrically controlled driving unit is arranged on the frame 600 and is used to drive the telescopic mechanism to operate, so that the telescopic mechanism drives the shaft sleeve 300 to move axially along the middle shaft 200, and the shaft sleeve 300 can rotate relative to the telescopic mechanism. Further, the electrically controlled driving unit can be controlled by the speed controller 1030 to send a command to drive the tooth disc 700 to move, so as to control the movement of the tooth disc 700. There are many other ways to drive the tooth disc 700 to move along the middle shaft 200, which will not be described here, and some of the implementation manners will be further described later.

[0083] The above-mentioned telescopic mechanism can be a hydraulic cylinder, an air cylinder, an electric push rod, etc., and the electrically controlled driving unit is an electric driving device matched with the hydraulic cylinder, the air cylinder, or the electric push rod.

[0084] In some embodiments, with reference to Figures 2 to 4 , the tooth disc moving mechanism comprises:

[0085] The shaft sleeve 300 is movably sleeved on the middle shaft 200 and is located on one side of the middle shaft 200 close to the tooth disc 700. The tooth disc 700 is arranged on the shaft sleeve 300.

[0086] The electrically controlled driving unit is in communication connection with the speed controller 1030 and is used to drive the shaft sleeve 300 to move axially along the middle shaft 200.

[0087] In this embodiment, by arranging the movable shaft sleeve 300 on the middle shaft 200 and arranging the tooth disc 700 on the shaft sleeve 300, the electrically controlled driving unit can be used to drive the shaft sleeve 300 to move along the middle shaft 200, so that the tooth disc 700 can move along the middle shaft 200. Finally, when the bicycle freewheel 900 changes the gear position, the electrically controlled driving unit can be used to drive the tooth disc 700 to adaptively adjust according to the change of the bicycle gear position, so as to effectively reduce the included angle between the chain and the tooth disc 700, thereby improving the riding efficiency of the bicycle rider. In addition, because the included angle is reduced, the meshing cutting range of the chain and the tooth is wider, which can reduce the chain falling back, reduce the asymmetric wear of the tooth part, reduce the axial force of the tooth part, and is beneficial to reducing the deformation of the tooth, thereby prolonging the service life.

[0088] The aforementioned bushing 300 is fitted onto the central shaft 200 and can move along the central shaft 200. After the crankcase 700 is fixed on the bushing 300, the crankcase 700 can be moved along the central shaft 200, thereby adjusting the relative position of the crankcase 700 and the central shaft 200.

[0089] The aforementioned central axle 200 is mounted on the frame 600 via a bearing system, allowing the bushing 300 to rotate along with the central axle 200.

[0090] The bottom bracket 200 can be equipped with crank connecting shafts 800 at both ends for connecting cranks. The cyclist rotates the crank to drive the bottom bracket 200 to rotate, which in turn drives the bushing 300 to rotate.

[0091] The maximum range of movement of the aforementioned bushing 300 along the axial direction of the central shaft 200 can be adaptively adjusted according to the length of the central shaft 200. For details, please refer to... Figure 2 , Figure 3 The maximum travel distance can be constrained by the length of the central axle 200 and the position of the frame 600, or a separate limiting mechanism can be set to limit the travel range of the bushing 300.

[0092] The length of the aforementioned bushing 300 can be flexibly adjusted according to actual needs, for example, as... Figure 3 As shown, when the design length is long, the bushing 300 can be extended between the bearing system and the central shaft 200; when the design length is short, it does not need to extend between the bearing system and the central shaft 200, and the entire bushing remains outside the bearing system. It should be noted that both the length and the length of the bushing 300 have their advantages. When the demand for the movement drive of the sprocket 700 is relatively small, a shorter bushing 300 can be considered.

[0093] In some scenarios, the length of the aforementioned bushing 300 can be set to 1.2 to 3 times the travel of the chainring 700.

[0094] The aforementioned electric drive unit can drive the bushing 300 to move, thereby adjusting the relative position of the chainring 700 and the bottom bracket 200, thereby adjusting the relative position between the chainring 700 and the freewheel 900, and thus adjusting the angle between the chain and the chainring 700.

[0095] The aforementioned electric drive unit can be installed inside or outside the central shaft 200. The specific installation position can be flexibly adjusted according to actual needs, so as to enable the drive shaft sleeve 300 to move.

[0096] The aforementioned electric drive unit is connected to the transmission controller 1030, and then adjusts the position of the chainring according to the control signal sent by the transmission controller 1030.

[0097] The above electric drive unit is a mechanism that is actively adjusted, and therefore, the movement of the shaft sleeve 300 can be limited, i.e., the shaft sleeve 300 will not move passively due to the traction of the chain, thereby improving the stability of the ride.

[0098] In some embodiments, an installation cavity is arranged axially in the middle shaft 200, and a first key groove is arranged in the outer peripheral wall of the middle shaft 200 and communicates with the installation cavity.

[0099] The electric drive unit includes:

[0100] The electric drive mechanism 410 is electrically connected to the speed control device 1030 and is located in the installation cavity away from the toothed disc 700.

[0101] The drive screw 420 is located in the installation cavity close to the toothed disc 700, and one end of the drive screw 420 is connected to the electric drive mechanism 410.

[0102] The moving part 430 is threadedly connected to the drive screw 420, and the moving part 430 is connected to the shaft sleeve 300 and / or the toothed disc 700 through the first key groove. The electric drive mechanism 410 is used to drive the drive screw 420 to rotate to drive the moving part 430 to move along the axial direction of the middle shaft 200, so that the shaft sleeve 300 moves along the middle shaft 200.

[0103] The above installation cavity is arranged axially in the middle shaft 200, and the installation cavity can be used to accommodate the electric drive unit.

[0104] The above middle shaft 200 is provided with a crank connecting shaft 800 at both ends, and a through hole is arranged in the crank connecting shaft 800 away from the shaft sleeve 300 along the axial direction of the middle shaft 200 to communicate with the installation cavity. An electric connector can be arranged in the through hole to electrically connect the electric drive unit, so as to facilitate subsequent charging and / or data transmission operations of the electric drive unit.

[0105] The above installation cavity can be divided into two chambers, a first chamber is arranged away from the shaft sleeve 300, and a second chamber is arranged close to the shaft sleeve 300. The electric drive mechanism 410 can be arranged in the first chamber, and the drive screw 420 and the moving part 430 can be arranged in the second chamber, so as to separate the electrical structure and reduce the possibility of damage to the electrical structure by the external environment during use.

[0106] The outer peripheral wall of the middle shaft 200 is provided with a first key groove on the side close to the shaft sleeve 300, the first key groove is connected with the mounting cavity, the first key groove can be provided in a strip shape, and the length direction is consistent with the axial direction of the middle shaft 200, so that the moving part 430 is connected with the shaft sleeve 300, and the moving part 430 can also slide along the first key groove. At the same time, the setting of the first key groove can effectively prevent the relative rotation of the shaft sleeve 300 and the middle shaft 200.

[0107] The first key groove can be provided on the side of the outer peripheral wall of the middle shaft 200 close to the shaft sleeve 300, and the first key groove can be provided on the side of the outer peripheral wall of the middle shaft 200 close to the shaft sleeve 300. The setting of multiple first key grooves can increase the stability between the moving part 430 and the shaft sleeve 300. As shown in the figure, the middle shaft 200 is provided with two first key grooves, and the upper and lower parts of the inner wall of the shaft sleeve 300 are connected with the moving part 430 through the first key grooves. Figure 3

[0108] The electric drive mechanism 410 is arranged on one side of the mounting cavity, and the moving part 430 is arranged on the other side of the mounting cavity. The electric drive mechanism 410 and the moving part 430 are connected through the drive screw 420, so that the electric drive mechanism 410 can drive the moving part 430 to move along the axial direction of the middle shaft 200 through the drive screw 420, and then drive the shaft sleeve 300 and / or the tooth disc 700 through the moving part 430.

[0109] The moving part 430 can be a nut, or other base with a threaded hole structure.

[0110] In this embodiment, the electric drive mechanism 410 can drive the screw 420 to rotate and then drive the moving part 430 to move along the axial direction of the middle shaft 200, so as to adjust the position of the shaft sleeve 300 and adjust the relative position of the tooth disc 700 and the flywheel 900. Moreover, the electric drive mechanism 410 can realize accurate control of the moving position of the shaft sleeve 300, and the electric drive mechanism 410 can also realize the limitation of the movement of the shaft sleeve 300, so that the shaft sleeve 300 cannot be passively moved under the traction of the chain, and the stability of riding is improved.

[0111] In some embodiments, the drive screw 420 can be replaced by a hydraulic cylinder, and the electric drive mechanism 410 can be replaced by a hydraulic drive system controlled by an electric control, which can also drive the moving part. In the case that the hydraulic drive system has a large volume, the hydraulic drive system can be arranged outside the middle shaft, and the hydraulic drive system is connected to the hydraulic cylinder arranged in the mounting cavity through the oil outlet pipe, so as to realize the extension and contraction control of the piston rod of the hydraulic cylinder. It should be noted that the hydraulic cylinder and the hydraulic drive system are connected through a hydraulic rotary joint, so that the external hydraulic drive system will not affect the rotation ability of the middle shaft.

[0112] In some embodiments, with reference to​Figures 2 to 4 , the electric drive mechanism 410 comprises:

[0113] The drive motor 411 is arranged in the mounting cavity.

[0114] The speed reducer 412 is arranged in the mounting cavity and located between the drive motor 411 and the tooth disc 700, and the speed reducer 412 is used to drive the drive screw 420 to rotate.

[0115] The electric control module 413 is arranged in the mounting cavity and electrically connected with the drive motor 411.

[0116] The wireless communication module 414 is arranged in the mounting cavity and electrically connected with the electric control module 413.

[0117] The power storage module 415 is arranged in the mounting cavity and used to supply power for the electric control module 413, the wireless communication module 414 and the drive motor 411.

[0118] The drive motor 411, the speed reducer 412 and the drive screw 420 are arranged in the mounting cavity in sequence.

[0119] The drive motor 411 can be connected to the external speed change controller 1030 through the through hole arranged on the crank connecting shaft 800, and the control of the drive motor 411 is directly completed by the external speed change controller 1030. The drive motor 411 can also be connected with the speed change controller 1030 through the electric control module 413 arranged in the mounting cavity, and the control of the drive motor 411 is indirectly completed by the speed change controller 1030 through the electric control module 413. The drive motor 411 can also be wirelessly connected with the speed change controller 1030 through the wireless communication module 414 arranged in the mounting cavity, and the control of the drive motor 411 is indirectly completed by the speed change controller 1030 through the wireless communication module 414. The specific control mode needs to be adjusted according to the actual application requirement. That is, in the embodiment, the electric control module 413 and the wireless communication module 414 are optional modules.

[0120] The speed reducer 412 can provide a larger torque to improve the driving capacity of the drive screw 420.

[0121] The wireless communication module 414 can realize wireless communication with the outside world.

[0122] The wireless communication module 414 can adopt a Bluetooth, WIFI or other wireless communication module 414, and the specific selection can be selected according to the actual requirement.

[0123] The above-mentioned power storage module 415 can directly use a lithium battery. With the power storage module 415, the electric control module 413, the wireless communication module 414, and the driving motor 411 can operate without relying on an external power supply, thereby reducing or even eliminating fixed wiring, improving the applicability of the bicycle shifting system, and reducing the installation difficulty of the bicycle shifting system.

[0124] In some embodiments, with reference to Figures 2 to 4 , the speed reducer 412, the driving motor 411, the electric control module 413, the wireless communication module 414, and the power storage module 415 can be arranged as a motor assembly. By arranging as an assembly, installation and later maintenance can be quickly performed.

[0125] In some embodiments, the bearing system comprises:

[0126] The first bearing 110 is arranged to rotate the middle shaft 200 and is located on the side of the middle shaft 200 away from the gear disc 700. The first bearing 110 is also used to limit the axial movement of the middle shaft 200.

[0127] In the present embodiment, the first bearing 110 is used to realize the rotation of the middle shaft 200, meeting the rotation requirement of the middle shaft 200. At the same time, in the present embodiment, the first bearing 110 is provided with a limiting function, so that when the driving shaft sleeve 300 moves, the middle shaft 200 will not move.

[0128] The above-mentioned first bearing 110 for limiting the axial movement of the middle shaft 200 can be matched by arranging a limiting protruding block on the middle shaft 200, as shown in Figure 3 , a limiting protruding block is arranged on the outer peripheral wall of the middle shaft 200 at the part of the first bearing 110 close to the shaft sleeve 300 to provide a one-way limit. At the same time, an axial locking structure 130 is arranged at the part of the first bearing 110 away from the shaft sleeve 300 to realize the limitation of the first bearing 110 in the other direction, thereby completing the limitation of the back-and-forth movement of the middle shaft 200 in the axial direction. A first locking plug 140 is arranged on the frame 600 or the assembly seat 500 at the part of the first bearing 110 away from the shaft sleeve 300 to realize the fixation of the first bearing 110.

[0129] The above-mentioned axial locking structure 130 can directly use an axial locking nut.

[0130] After the installation of the above-mentioned axial locking structure 130, if there is a gap between the axial locking structure 130 and the frame 600, a first sealing ring 150 can be added for sealing.

[0131] In some embodiments, the first bearing 110 can use a ball bearing.

[0132] In this embodiment, the ball bearing has strong axial bearing capacity, which can better bear the axial force of the tooth disc 700, and the ball bearing can better fix the middle shaft 200.

[0133] In some embodiments, the bearing system further comprises:

[0134] The second bearing 120 is arranged near the tooth disc 700 and is used to rotate the shaft sleeve 300.

[0135] In this embodiment, the shaft sleeve 300 is designed to extend between the middle shaft 200 and the frame 600, and the second bearing 120 is arranged to reduce the friction between the shaft sleeve 300 and the frame 600, so that the shaft sleeve 300 can rotate more smoothly.

[0136] In some embodiments, the second bearing 120 is a needle bearing.

[0137] In this embodiment, the second bearing 120 is a needle bearing, which can better improve the rotation and movement of the shaft sleeve 300.

[0138] In some embodiments, the second bearing 120 can also be a ball bearing or a combination of multiple ball bearings.

[0139] In some embodiments, a second locking plug 160 can be arranged on the frame 600 or the assembly seat 500 near the second bearing 120 to fix the needle bearing. After the second bearing 120 is installed, if there is a gap between the second bearing 120 and the frame 600, a second sealing ring 170 can be added to seal the gap.

[0140] In some embodiments, a second key groove is arranged on the outer circumferential wall of the middle shaft 200 along the axial direction of the middle shaft 200, and a sliding key is arranged on the inner circumferential wall of the shaft sleeve 300, and the sliding key can slide along the second key groove.

[0141] The second key groove can limit the sliding direction of the sliding key, so that the movement of the shaft sleeve 300 is more smooth, and the shaft sleeve 300 can also be provided with a certain restriction ability for the circumferential rotation of the middle shaft 200.

[0142] In some embodiments, the second key groove and the first key groove can be the same key groove, and the key groove can meet the use requirements by being arranged with a suitable length.

[0143] In some embodiments, the adaptive speed control system further comprises:

[0144] The assembly seat 500 is arranged in the frame 600 in a detachable manner, and the bearing system is arranged in the assembly seat 500.

[0145] In this embodiment, by arranging the bearing system in the assembly seat 500, the entire adaptive gear control system can be arranged as an assembly structure, and the entire adaptive gear control system can be quickly installed and replaced through the assembly seat 500, thereby improving the use experience of the rider.

[0146] The application also provides a bicycle comprising the adaptive gear control system as described above. Since the bicycle has the adaptive gear control system, the bicycle has all the beneficial effects brought by the adaptive gear control system.

[0147] The above is only a specific embodiment of the application, and those skilled in the art can clearly understand it. It should be understood that the protection scope of the application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the application, and these modifications or replacements should be covered within the protection scope of the application.

Claims

1. An adaptive speed control system, characterized in that, include: Torque detection unit is used to detect the output torque of human foot pedaling; The cadence detection unit is used to detect the cadence of a human pedaling the crank. The gear shift controller is electrically connected to the torque detection unit and the cadence detection unit, respectively; the gear shift controller is also used to electrically connect to the bicycle's freewheel gear shifting device.

2. The adaptive speed control system according to claim 1, characterized in that, The adaptive speed control system also includes: The human-machine interface unit is communicatively connected to the speed controller.

3. The adaptive speed control system according to claim 1, characterized in that, The torque detection unit is mounted on the crank and / or chainring and / or bottom bracket; and / or, The cadence detection unit is mounted on the crank and / or chainring and / or bottom bracket.

4. The adaptive speed control system according to claim 1, characterized in that, The speed controller is also used for communication connection with the crankcase moving mechanism; the crankcase moving mechanism is used to drive the crankcase to move axially along the central axis.

5. The adaptive speed control system according to claim 1, characterized in that, The adaptive speed control system also includes: The lactic acid detection device is communicatively connected to the speed controller and is used to detect lactic acid in the human body.

6. The adaptive speed control system according to claim 1, characterized in that, The adaptive speed control system also includes: A heart rate detection device is communicatively connected to the speed controller and is used to detect human heart rate.

7. The adaptive speed control system according to claim 1, characterized in that, The adaptive speed control system also includes: A blood pressure detection device is communicatively connected to the speed controller and is used to detect human blood pressure.

8. A bicycle gear shifting system, characterized in that, include: The adaptive speed control system as described in any one of claims 1 to 7; The flywheel gear shifting device is electrically connected to the gear controller and is used to adjust the gear position of the flywheel.

9. The bicycle transmission system according to claim 8, characterized in that, The bicycle transmission system also includes: The crankcase moving mechanism is communicatively connected to the speed controller and is used to drive the crankcase to move axially along the central axis.

10. A bicycle, characterized in that, Including the adaptive speed control system as described in any one of claims 1 to 7.

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