Intelligent bicycle speed change system and bicycle

Abstract

According to the intelligent bicycle speed change system and the bicycle, the riding state of a rider can be determined by arranging a plurality of state detection units, and a main controller is connected to a flywheel speed change device, so that the main controller has the capability of controlling the flywheel speed change device to shift gears; the self-adaptive adjustment of the gear of the flywheel can be completed in the riding process of a rider, meanwhile, the crankset mechanism is adjusted to be capable of moving along the middle shaft from a traditional fixed mode, the included angle between the chain and the crankset can be kept in the state as small as possible all the time after gear shifting is completed, and finally the self-adaptive adjustment of the gear of the flywheel can be completed. By means of the means, a rider can feel more comfortable and efficient in the riding process.

Description

TECHNICAL FIELD

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

[0002] At present, the gear shifting of a variable speed bicycle still needs to be manually operated, therefore, when encountering a change in slope or needing to adjust the speed during riding, the rider needs to judge the gear shifting timing by relying on his own experience. This mode puts high requirements on the experience accumulation of the rider, especially beginners often have difficulty in accurately grasping the gear shifting timing, and operation errors not only cause obvious jerking during riding, but also increase physical consumption and greatly reduce the riding experience. At the same time, during gear shifting, the angle between the sprocket and the chain may be large, thereby reducing the riding efficiency and further affecting the riding experience. CONTENT OF THE INVENTION

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

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

[0005] a plurality of state detection units, each of which is used to collect at least one of bicycle operating parameters and / or at least one of human body function parameters;

[0006] a main controller, which is electrically connected to the plurality of state detection units;

[0007] a freewheel gear shifting device, which is electrically connected to the main controller and is used to adjust the gear position of the freewheel;

[0008] a sprocket moving mechanism, which is in communication connection with the main controller and is used to drive the sprocket to move along the central shaft in the axial direction.

[0009] The bicycle according to the second aspect of the present application comprises the intelligent bicycle gear shifting system according to the first aspect.

[0010] The intelligent bicycle gear shifting system and the bicycle according to the present application can determine the riding state of the rider by arranging a plurality of state detection units, and the main controller can control the gear shifting of the freewheel gear shifting device, thereby achieving self-adaptive adjustment of the gear position of the freewheel during the riding of the rider. At the same time, the sprocket mechanism is changed from the traditional fixed type to the form of being movable along the central shaft, so that the angle between the chain and the sprocket can be kept as small as possible after gear shifting, and finally, the rider can ride more comfortably and efficiently.

[0011] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0012] 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:

[0013] Figure 1 An electrical system diagram of the intelligent bicycle gear shifting system provided for the embodiments of the present application;

[0014] Figure 2 An overall structure schematic diagram of the tooth disc moving mechanism provided for the embodiments of the present application;

[0015] Figure 3 A partial sectional view of the tooth disc moving mechanism provided for the embodiments of the present application.

[0016] Reference Signs:

[0017] 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;

[0018] Middle shaft 200;

[0019] Shaft sleeve 300;

[0020] 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;

[0021] Assembly seat 500;

[0022] Frame 600;

[0023] Tooth disc 700;

[0024] Crank connecting shaft 800;

[0025] Flywheel 900;

[0026] Torque detection unit 1010; pedaling frequency detection unit 1020; main controller 1030; human-computer interaction unit 1040; lactic acid detection device 1050; heart rate detection device 1060; blood pressure detection device 1070. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation of the present application, and are not to be understood as a limitation of the present application.

[0028] In the description of the present application, if there is a description to first, second, etc. is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present application, it is to be understood that the orientation description, such as up, down, etc. indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it is to be noted that, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] The technical solutions of the present application will be described below in detail in combination with the drawings, obviously, the following described embodiments are part of the embodiments of the present application, not all the embodiments.

[0032] Referring to Figure 1 The intelligent bicycle speed change system provided by an embodiment of the present application, the intelligent bicycle speed change system comprises:

[0033] A plurality of state detection units, each state detection unit is used for collecting at least one of bicycle running parameters and / or at least one of human body function parameters;

[0034] A main controller 1030, electrically connected with the plurality of state detection units respectively;

[0035] A freewheel speed change device, electrically connected with the main controller 1030, used for adjusting the gear position of the freewheel 900;

[0036] A tooth disc moving mechanism, in communication connection with the main controller 1030, the tooth disc moving mechanism is used for driving the tooth disc 700 to move axially along the central shaft 200.

[0037] In the embodiments of the present application, by setting multiple state detection units, the riding state of the rider can be determined, and by connecting the main controller 1030 to the freewheel gear shifting device, the main controller 1030 can be provided with the ability to control the gear shifting of the freewheel gear shifting device, and further, the adaptive adjustment of the gear position of the freewheel 900 can be completed during the rider's riding process. At the same time, the chainring mechanism is changed from the traditional fixed type to the form of being movable along the central shaft, so that the angle between the chain and the chainring can be kept as small as possible after the gear shifting is completed. Finally, through the above-mentioned means, the rider can be more comfortable and efficient during the riding process.

[0038] The above-mentioned bicycle operating parameters can include parameters such as driving speed, wheel speed, pedaling frequency, torque, etc. which can be directly detected on the bicycle. The specific number of types needs to be flexibly selected according to actual needs. In many common scenarios, setting pedaling frequency and torque can meet the requirements.

[0039] The above-mentioned human function parameters can include blood pressure, lactic acid, heart rate, blood oxygen content, etc. which need to be obtained by detecting the rider. The specific number of types needs to be flexibly selected according to actual needs. In many common scenarios, setting lactic acid and heart rate can meet the requirements.

[0040] After the main controller 1030 is electrically connected to the multiple state detection units, the bicycle operating parameters and / or human function parameters collected by the multiple state detection units can be directly obtained. The specific type and number of collection need to be determined according to the type of sensor corresponding to the multiple state detection units and the speed of each type.

[0041] After the main controller 1030 is electrically connected to the freewheel gear shifting device of the bicycle, the adjustment of the gear position of the freewheel 900 can be controlled by the freewheel gear shifting device.

[0042] The above-mentioned freewheel gear shifting device can directly adopt the mature electric freewheel gear shifting mechanism on the market for controlling the gear shifting of the freewheel 900, or other forms of freewheel gear shifting mechanism that can be controlled by the main controller 1030. For example, a common electric freewheel gear shifting mechanism can start the gear shifting operation by giving a simple control instruction.

[0043] It should be noted that the bicycle operating parameters and the human body function parameters can reflect the body state of the rider to a certain extent during riding. For example, the torque can reflect the force state of the rider during riding. Generally, the more forceful, the greater the torque. The pedaling frequency can directly reflect the speed of the rider pedaling the pedal. Generally, the faster the speed, the more difficult it is. Lactic acid can directly reflect the current anaerobic exercise situation or fatigue state of the rider. Generally, the higher the lactic acid, the more prominent the anaerobic exercise situation or the more fatigue. Heart rate can directly reflect the load state of the rider. Generally, the higher the heart rate, the greater the current load on the rider. Based on the foregoing principle, the current riding state of the rider can be effectively determined by comprehensively determining the bicycle operating parameters and the human body function parameters, and then the sprocket 900 is controlled to shift up when the human body is tired, and the sprocket 900 is controlled to shift down when it is too easy. However, how to determine the riding state of the rider by using the bicycle operating parameters and the human body function parameters can be achieved in many ways. Generally, multiplication operation, weighted operation, etc. can be directly used. Some fixed calculation models can also be used. Taking lactic acid and heart rate as an example, the product of lactic acid and heart rate can be directly used, and the product and the pre-set threshold or threshold range can be used to determine whether the current riding state is ideal. For example, the product is greater than the pre-set threshold or threshold range to shift up, and the product is less than the pre-set threshold or threshold range to shift down. Of course, a weight factor can be further introduced to perform weighted operation on lactic acid and heart rate, so that a better calculation value (the product can be understood as the calculation value) for determining the pre-set threshold or threshold range can be obtained in some scenarios. Then, the calculation value and the pre-set threshold or threshold range can be used to complete the determination. The specific implementation manner is various, and the specific implementation manner can be selected by the user according to the actual demand.

[0044] In addition, further considering the scenario that the tooth disc moving mechanism can drive the tooth disc 700 to move axially along the central shaft 200, the tooth disc 700 is controlled to move axially along the central shaft 200 before or after or at the same time as the sprocket shifting device is controlled to complete gear shifting by the main controller 1030, so that the angle between the chain and the tooth disc 700 can be reduced as much as possible after the sprocket 900 is shifted, so as to improve the riding experience of the rider to the greatest extent.

[0045] It can be understood that the tooth disc 700 can move axially along the central shaft 200, which means that the central shaft 200 has a space reserved for the tooth disc 700 to move.

[0046] The tooth disc moving mechanism can achieve various ways of driving the tooth disc 700 to move axially along the central shaft 200.

[0047] In some embodiments, the tray moving mechanism can include a shaft sleeve 300, an electric control driving unit, the electric control driving unit including a telescopic mechanism and a driving device arranged in pair with the telescopic mechanism, the shaft sleeve 300 being sleeved on the middle shaft 200 and being movable along the axial direction of the middle shaft 200, the shaft sleeve 300 being relatively fixed with the middle shaft 200 in the circumferential direction of the middle shaft 200; the tray 700 being arranged on the shaft sleeve 300; the telescopic mechanism being located outside the middle shaft 200 and being connected to the shaft sleeve 300 and / or the tray 700; the driving device being arranged on the frame 600 and being used to drive the telescopic mechanism to operate, so that the telescopic mechanism drives the shaft sleeve 300 to move along the axial direction of the middle shaft 200, and the shaft sleeve 300 is rotatable relative to the telescopic mechanism. Then, the main controller 1030 can send a command for driving the tray 700 to move to the driving device, so as to control the movement of the tray 700. There are many ways for the tray 700 to move along the middle shaft 200, which will not be described here again, and some of the implementation manners will be further described later.

[0048] The telescopic mechanism can be a hydraulic cylinder, an air cylinder, an electric push rod or the like, and the driving device can be an electric driving device matched with the hydraulic cylinder, the air cylinder or the electric push rod, such as a hydraulic driving system, a pneumatic driving system, an electric driving system or the like.

[0049] In some embodiments, the plurality of state detection units at least include:

[0050] The lactic acid detection device 1050 is in communication connection with the main controller 1030 and is used to detect the lactic acid of the human body; and / or,

[0051] The heart rate detection device 1060 is in communication connection with the main controller 1030 and is used to detect the heart rate of the human body; and / or,

[0052] The blood pressure detection device 1070 is in communication connection with the main controller 1030 and is used to detect the blood pressure of the human body.

[0053] In the embodiment, the state of the lactic acid, the heart rate and the blood pressure can effectively reflect the functional state of the human body, and then the lactic acid detection device 1050, the heart rate detection device 1060 and the blood pressure detection device 1070 are introduced to detect the lactic acid, the heart rate and the blood pressure of the rider, so that the gear can be lowered in time to avoid injury to the rider when the lactic acid, the heart rate and the blood pressure are high, and the gear can be raised when it is judged that the state of the rider is good.

[0054] It should be noted that, in actual application, one or more of the lactic acid detection device 1050, the heart rate detection device 1060 and the blood pressure detection device 1070 can be selected according to actual needs, and multiple devices do not have to be selected at the same time.

[0055] In addition, it should be noted that the aforementioned process of determining the physical state or functional state of the rider by using lactic acid and heart rate can be understood as follows: when the blood pressure parameter is increased, the lactic acid and heart rate obtained in the foregoing can be comprehensively considered, for example, the product of the three can be used, and the calculation value obtained by using the weighted calculation of the three can be used to control the gear position. The specific control method can refer to the aforementioned lactic acid and heart rate control method. It can also be understood that any two parameters of lactic acid, heart rate and blood pressure can be directly used to control the gear shift process according to the control method of lactic acid and heart rate.

[0056] The lactic acid detection device 1050, the heart rate detection device 1060, and the blood pressure detection device 1070 can all be directly used as mature products on the market.

[0057] 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 a smart wearable device, and the collected data can be transmitted to the main controller 1030 through wireless communication by the smart wearable device.

[0058] In some embodiments, the plurality of state detection units further comprise:

[0059] The torque detection unit 1010 is in communication connection with the main controller 1030 and is configured to detect the output torque of the human body pedaling.

[0060] The pedaling frequency detection unit 1020 is in communication connection with the main controller 1030 and is configured to detect the pedaling frequency of the human body pedaling the crank.

[0061] The torque detection unit 1010 can be a torque sensor, a stress sensor, etc., which can be installed at the crank, the middle shaft 200, etc., to detect the torque formed by the rider pedaling the crank.

[0062] 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 sprocket 700, etc., to determine the pedaling frequency of the rider.

[0063] In the present embodiment, the torque detection unit 1010 and the pedaling frequency detection unit 1020 are introduced to enrich the ways of detecting the riding state of the rider and to better adapt to the needs of different scenarios.

[0064] It should be noted that the output torque and the pedaling frequency are also the detection results of the state detection unit, and thus, when the output torque and the pedaling frequency are needed, the lactate, the heart rate, the output torque and the pedaling frequency can be comprehensively considered, for example, the gear control can be performed by using the product of three or four of them, and the calculation value of the result of the weighted calculation of three or four of them, and the specific control mode can refer to the control mode of the lactate and the heart rate. It can also be understood that any two parameters selected from the output torque, the pedaling frequency, the lactate, the heart rate and the blood pressure can be directly controlled by referring to the control gear shifting process of the lactate and the heart rate.

[0065] In some embodiments, the intelligent bicycle shifting system further comprises:

[0066] The human-computer interaction unit 1040 is in communication connection with the main controller 1030.

[0067] 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 additionally provided to adjust the pre-set threshold value or threshold value range, so as to better meet the use requirements of different riders.

[0068] It should be noted that in the case of having other intelligent terminals, the rider can also transmit the instruction for modifying the pre-set threshold value or threshold value range to the main controller 1030 through the other intelligent terminals, so as to complete the adjustment of the pre-set threshold value or threshold value range.

[0069] In some embodiments, the torque detection unit 1010 is arranged on the crank and / or the pedal 700 and / or the middle shaft 200; and / or,

[0070] The pedaling frequency detection unit 1020 is arranged on the crank and / or the pedal 700 and / or the middle shaft 200.

[0071] The torque detection unit 1010 described above is arranged on the crank, the pedal 700 or the middle shaft 200, and theoretically, the detection of the torque can be realized. Although the values directly detected at different positions can be different, they can be pre-processed by simple mathematical operations to obtain the output torque formed by the rider pedaling the pedal.

[0072] The torque detection unit 1010 described above can include multiple torque sensors, in which case, the torque sensors can be arranged at multiple positions of the crank, the pedal 700 and the middle shaft 200. Subsequently, after normalization processing, mean value calculation can be performed to obtain the torque closest to the true torque and eliminate the error caused by the collection of a single sensor.

[0073] The torque detection unit 1010 can be arranged on the crank, the chainring 700 or the middle shaft 200, and theoretically, the torque can be detected. Although the values detected at different positions are different, the values can be obtained by simple preprocessing to represent the torque formed by the rider pedaling the pedal.

[0074] The pedal frequency detection unit 1020 can include multiple pedal frequency sensors. In this case, the torque sensor can be arranged at multiple positions of the crank, the chainring 700 or the middle shaft 200. After normalization, the mean value can be calculated to obtain the closest real pedal frequency and eliminate the error caused by a single sensor.

[0075] In some embodiments, multiple lactate detection devices 1050, heart rate detection devices 1060 and blood pressure detection devices 1070 can be arranged to obtain multiple values and then calculate the mean value to avoid errors caused by a single sensor.

[0076] In some embodiments, the chainring moving mechanism includes:

[0077] The shaft sleeve 300 is movably arranged on the middle shaft 200 and located on the side of the middle shaft 200 close to the chainring 700. The chainring 700 is arranged on the shaft sleeve 300.

[0078] The electric control driving unit is in communication connection with the main controller 1030 and is used to drive the shaft sleeve 300 to move axially along the middle shaft 200.

[0079] In this embodiment, the movable shaft sleeve 300 is arranged on the middle shaft 200, and the chainring 700 is arranged on the shaft sleeve 300. The electric control driving unit drives the shaft sleeve 300 to move along the middle shaft 200, so that the chainring 700 can move along the middle shaft 200. Finally, when the bicycle freewheel 900 changes the gear position, the electric control driving unit drives the chainring 700 to adaptively adjust the gear position to effectively reduce the angle between the chain and the chainring 700, thereby improving the riding efficiency of the bicycle rider. In addition, because the angle is small, the meshing range of the chain and the teeth is wider, which can reduce the back-off chain, reduce the wear of the asymmetric teeth, reduce the axial force of the teeth, and is beneficial to reduce the deformation of the teeth, thereby prolonging the service life.

[0080] The shaft sleeve 300 is arranged on the middle shaft 200 and can move along the middle shaft 200. After the chainring 700 is fixed on the shaft sleeve 300, the chainring 700 can move along the middle shaft 200 to adjust the relative position of the chainring 700 and the middle shaft 200.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] The aforementioned electronically controlled 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.

[0087] The aforementioned electronically controlled drive unit can be located inside or outside the central shaft 200. The specific location can be flexibly adjusted according to actual needs, and the drive shaft sleeve 300 can be moved.

[0088] The aforementioned electronically controlled drive unit is connected to the main controller 1030, and then adjusts the position of the gear plate according to the control signal sent by the main controller 1030.

[0089] Because the aforementioned electronically controlled drive unit is an actively adjusting mechanism, it can also restrict the movement of the bushing 300. That is, the bushing 300 will not move passively due to the traction of the chain, thus improving the stability of riding.

[0090] In some embodiments, the middle shaft 200 is provided with a mounting cavity in the axial direction, and the outer peripheral wall of the middle shaft 200 is provided with a first key groove in communication with the mounting cavity;

[0091] The electric control driving unit includes:

[0092] The electric driving mechanism 410 is electrically connected with the main controller 1030 and is located in the mounting cavity away from the tooth disc 700;

[0093] The driving screw 420 is located in the mounting cavity close to the tooth disc 700, and one end of the driving screw 420 is connected with the electric driving mechanism 410;

[0094] The moving part 430 is threadedly connected with the driving screw 420, and the moving part 430 is connected with the shaft sleeve 300 and / or the tooth disc 700 through the first key groove; the electric driving mechanism 410 is used to drive the driving 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.

[0095] The above-mentioned middle shaft 200 is provided with a mounting cavity in the axial direction, and the mounting cavity can be used to accommodate the electric control driving unit.

[0096] The above-mentioned middle shaft 200 is provided with a crank connecting shaft 800 at both ends, and a through hole is formed 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 mounting cavity, and a wiring seat electrically connected with the electric control driving unit can be arranged in the through hole, so as to facilitate subsequent charging and / or data transmission operation of the electric control driving unit.

[0097] The above-mentioned mounting cavity can be divided into two chambers, the first chamber is arranged away from the shaft sleeve 300, and the second chamber is arranged close to the shaft sleeve 300, the electric driving mechanism 410 can be arranged in the first chamber, and the driving screw 420 and the moving part 430 can be arranged in the second chamber, so as to separate the electric part structure and reduce the possibility of damage to the electric part structure caused by the external environment during use.

[0098] The above-mentioned outer peripheral wall of the middle shaft 200 is provided with a first key groove close to the shaft sleeve 300, the first key groove is connected with the mounting cavity, the first key groove can be in the shape of a long strip, and the length direction is consistent with the axial direction of the middle shaft 200, so as to connect the moving part 430 with the shaft sleeve 300 and also allow the moving part 430 to slide along the first key groove. At the same time, the arrangement of the first key groove can effectively prevent the relative rotation between the shaft sleeve 300 and the middle shaft 200.

[0099] The above-mentioned first key groove can be arranged in multiple on the outer peripheral wall of the middle shaft 200 close to the shaft sleeve 300, and the arrangement of multiple first key grooves can increase the stability between the moving part 430 and the shaft sleeve 300. Figure 3As shown, the middle shaft 200 is provided with two first key grooves, and the upper and lower portions of the inner wall of the shaft sleeve 300 are connected with the moving part 430 through the first key grooves.

[0100] 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 lead screw 420, so that the electric drive mechanism 410 can drive the moving part 430 to move axially along the middle shaft 200 through the drive lead screw 420, and then drive the shaft sleeve 300 and / or the toothed disc 700 to move through the moving part 430.

[0101] The moving part 430 can be a nut or other base with a threaded hole structure.

[0102] In this embodiment, the electric drive mechanism 410 can drive the lead screw 420 to rotate and then drive the moving part 430 to move axially along the middle shaft 200, so as to adjust the position of the shaft sleeve 300 and achieve the purpose of adjusting the relative position of the toothed disc 700 and the flywheel 900. Moreover, the electric drive mechanism 410 can achieve precise control of the moving position of the shaft sleeve 300, and at the same time, the electric drive mechanism 410 can also achieve 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, thereby improving the stability of riding.

[0103] In some embodiments, the drive lead 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 430. In the case of a large volume of the hydraulic drive system, the hydraulic drive system can be arranged outside the middle shaft 200. The hydraulic drive system is connected to the hydraulic cylinder arranged in the mounting cavity through an oil outlet pipe, so as to achieve the extension and retraction 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 200.

[0104] In some embodiments, the electric drive mechanism 410 comprises:

[0105] The drive motor 411 is arranged in the mounting cavity;

[0106] The speed reducer 412 is arranged in the mounting cavity and located between the drive motor 411 and the toothed disc 700. The speed reducer 412 is used to drive the drive lead screw 420 to rotate;

[0107] The electric control module 413 is arranged in the mounting cavity and electrically connected with the drive motor 411.

[0108] The driving motor 411 can be connected to the external main controller 1030 through the through hole provided on the crank connecting shaft 800, and the control of the driving motor 411 is directly completed by the external main controller 1030. The driving motor 411 can also be connected to the main controller 1030 through the electric control module 413 provided in the mounting cavity, and the control of the driving motor 411 is indirectly completed by the main controller 1030 through the electric control module 413.

[0109] The reducer 412 can provide greater torque to improve the driving capacity of the driving screw 420.

[0110] In some embodiments, the electric driving mechanism 410 further comprises:

[0111] The wireless communication module 414 is provided in the mounting cavity and is electrically connected to the electric control module 413.

[0112] The power storage module 415 is provided in the mounting cavity and is used to supply power to the electric control module 413, the wireless communication module 414, and the driving motor 411.

[0113] The wireless communication module 414 can realize wireless communication with the outside world.

[0114] The wireless communication module 414 can use Bluetooth, WIFI, or other wireless communication modules 414. The specific selection can be made according to actual needs.

[0115] The 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 no longer need to rely on external power supply, so that fixed wiring can be reduced or even cancelled, and the applicability of the intelligent bicycle variable speed system is improved, and the installation difficulty of the intelligent bicycle variable speed system is reduced.

[0116] The driving motor 411 can also be wirelessly connected to the main controller 1030 through the wireless communication module 414 provided in the mounting cavity, and the control of the driving motor 411 is indirectly completed by the main controller 1030 through the wireless communication module 414. The specific selection of the control mode needs to be adjusted according to the actual application needs. That is, the electric control module 413 and the wireless communication module 414 can be understood as optional modules.

[0117] In some embodiments, with reference to Figures 1 to 3 The reducer 412, the driving motor 411, the electric control module 413, the wireless communication module 414, and the power storage module 415 can be provided as a motor assembly. By providing an assembly structure, installation and later maintenance can be quickly performed.

[0118] In some embodiments, the bearing system comprises:

[0119] The first bearing 110 is arranged to rotate the shaft 200 and is located on the shaft 200 away from the toothed disc 700. The first bearing 110 is also arranged to limit the axial movement of the shaft 200.

[0120] In this embodiment, the first bearing 110 is used to achieve the rotation of the shaft 200, meeting the rotation requirement of the shaft 200. At the same time, in this embodiment, the first bearing 110 is provided with a limiting function, so that when the drive shaft sleeve 300 moves, the shaft 200 will not move.

[0121] When the first bearing 110 is used to limit the axial movement of the shaft 200, a limiting protruding block can be arranged on the shaft 200 to cooperate with the first bearing 110, as shown in the figure. A limiting protruding block is arranged on the outer peripheral wall of the shaft 200 at the position close to the first bearing 110 to provide a one-way limit. At the same time, an axial locking structure 130 is arranged at the position away from the first bearing 110 to achieve the limitation of the first bearing 110 in the other direction, thereby completing the limitation of the axial movement of the shaft 200. A first locking plug 140 is arranged on the frame 600 or the assembly seat 500 at the position away from the first bearing 110 to fix the first bearing 110. Figure 3

[0122] The axial locking structure 130 can be directly used as an axial locking nut.

[0123] After the axial locking structure 130 is installed, if there is a gap between the frame 600, a first sealing ring 150 can be added for sealing.

[0124] In some embodiments, the first bearing 110 can be a ball bearing.

[0125] In this embodiment, the ball bearing has strong axial bearing capacity, which can better bear the axial force of the toothed disc 700. In addition, the ball bearing can better fix the shaft 200.

[0126] In some embodiments, the bearing system further comprises:

[0127] The second bearing 120 is arranged close to the toothed disc 700 to rotate the shaft sleeve 300.

[0128] In this embodiment, the shaft sleeve 300 is designed to extend between the shaft 200 and the frame 600. In order to reduce the friction between the shaft sleeve 300 and the frame 600, the second bearing 120 is arranged to make the shaft sleeve 300 rotate more smoothly.​

[0129] In some embodiments, the second bearing 120 is a needle bearing.

[0130] In the present embodiment, the second bearing 120 is selected as a needle bearing, which can better improve the rotating and moving effects of the shaft sleeve 300.

[0131] In some embodiments, the second bearing 120 can also be a ball bearing or formed by a combination of multiple ball bearings.

[0132] In some embodiments, a second locking plug 160 can be arranged on the frame 600 or the assembly seat 500 to fix the needle bearing at a position close to the sprocket 700. 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 for sealing.

[0133] In some embodiments, a second key groove is arranged on the outer circumferential wall of the shaft 200 along the axial direction of the shaft 200, and a sliding key is arranged on the inner circumferential wall of the shaft sleeve 300, which can slide along the second key groove.

[0134] The second key groove can limit the sliding direction of the sliding key, so that the moving process of the shaft sleeve 300 is more smooth, and the shaft sleeve 300 can also be provided with a certain restriction ability for rotating along the circumferential direction of the shaft 200.

[0135] In some embodiments, the second key groove and the first key groove can be the same key groove, which can meet the use requirements by setting the length of the key groove.

[0136] In some embodiments, the intelligent bicycle speed change system further comprises:

[0137] 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.

[0138] In the present embodiment, the bearing system is arranged in the assembly seat 500, so that the entire intelligent bicycle speed change system can be arranged as an assembly structure, and the entire intelligent bicycle speed change system can be quickly installed and replaced through the assembly seat 500, thereby providing a better use experience for the rider.

[0139] The above is only a specific embodiment of the present application, and it should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. An intelligent bicycle shifting system, characterized by, The system comprises: a plurality of state detection units, each of which is used to collect at least one of a bicycle operating parameter and / or at least one of a human body function parameter; a main controller, which is electrically connected to the plurality of state detection units respectively; a flywheel gear device, which is electrically connected to the main controller, and is used to adjust the gear of the flywheel; a tooth disc moving mechanism, which is in communication with the main controller, and is used to drive the tooth disc to move along the middle shaft in the axial direction.

2. The intelligent bicycle shifting system of claim 1, wherein, The plurality of state detection units at least comprises: a lactic acid detection device, which is in communication with the main controller, and is used to detect the lactic acid of the human body; and / or, a heart rate detection device, which is in communication with the main controller, and is used to detect the heart rate of the human body; and / or, a blood pressure detection device, which is in communication with the main controller, and is used to detect the blood pressure of the human body.

3. The intelligent bicycle shifting system of claim 1 or 2, wherein, The plurality of state detection units comprises: a torque detection unit, which is in communication with the main controller, and is used to detect the output torque of the human body pedaling; and / or, a pedaling frequency detection unit, which is in communication with the main controller, and is used to detect the pedaling frequency of the human body pedaling the crank.

4. The intelligent bicycle shifting system of claim 3, wherein, The torque detection unit is arranged on the crank and / or the tooth disc and / or the middle shaft; and / or, The pedaling frequency detection unit is arranged on the crank and / or the tooth disc and / or the middle shaft.

5. The intelligent bicycle shifting system of claim 1, wherein, The intelligent bicycle gear shifting system further comprises: a human-computer interaction unit, which is in communication with the main controller.

6. The intelligent bicycle shifting system of claim 1, wherein, The tooth disc moving mechanism comprises: a shaft sleeve, which is movably sleeved on the middle shaft and located on one side of the middle shaft close to the tooth disc; the tooth disc is arranged on the shaft sleeve; an electrically controlled driving unit, which is in communication with the main controller, and is used to drive the shaft sleeve to move along the middle shaft in the axial direction.

7. The intelligent bicycle shifting system of claim 6, wherein, An installation cavity is arranged in the middle shaft in the axial direction, and a first key groove is formed in the outer peripheral wall of the middle shaft and communicates with the installation cavity; The electrically controlled driving unit comprises: an electric driving mechanism, which is electrically connected to the main controller, and is located on one side of the installation cavity away from the tooth disc; a driving screw rod, which is located on one side of the installation cavity close to the tooth disc, and one end of the driving screw rod is connected to the electric driving mechanism; a moving piece, which is threadedly connected to the driving screw rod, and is connected to the shaft sleeve and / or the tooth disc through the first key groove; the electric driving mechanism is used to drive the driving screw rod to rotate to drive the moving piece to move along the middle shaft in the axial direction, so that the shaft sleeve moves along the middle shaft.

8. The intelligent bicycle shifting system of claim 7, wherein, The electric driving mechanism comprises: a driving motor, which is arranged in the installation cavity; a speed reducer, which is arranged in the installation cavity and located between the driving motor and the tooth disc, and is used to drive the driving screw rod to rotate; an electric control module, which is arranged in the installation cavity and electrically connected to the driving motor.

9. The intelligent bicycle shifting system of claim 8, wherein, The electric driving mechanism further comprises: a wireless communication module, which is arranged in the installation cavity and electrically connected to the electric control module; a power storage module, which is arranged in the installation cavity, and is used to supply power to the electric control module, the wireless communication module and the driving motor.

10. A bicycle characterized in that, The system comprises the intelligent bicycle gear shifting system according to any one of claims 1 to 9.

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