Self-adaptive bicycle speed change system and bicycle

Abstract

According to the self-adaptive bicycle speed change system and the bicycle, the riding state of a rider can be determined by arranging a torque detection unit and a pedaling frequency detection unit, 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, and the speed change efficiency of the bicycle is improved. 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 adaptive bicycle gear shifting system and a bicycle. BACKGROUND

[0002] At present, the speed change bicycle relies on manual gear shifting. When facing slope changes or speed adjustments during riding, the rider has to judge the gear shifting time by experience. This is quite challenging for beginners who lack experience. Once the beginners make a mistake, they will feel obvious jerks during riding, which increases physical consumption and makes the riding experience worse. In addition, during the gear shifting process, the angle between the chain and the sprocket of some gears is too large, which reduces the riding efficiency and further damages the riding experience. CONTENT OF THE UTILITY MODEL

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

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

[0005] a torque detection unit configured to detect the output torque of the human body pedaling;

[0006] a pedaling frequency detection unit configured to detect the pedaling frequency of the human body pedaling the crank;

[0007] a main controller electrically connected to the torque detection unit and the pedaling frequency detection unit;

[0008] a freewheel gear shifting device electrically connected to the main controller and configured to adjust the gear of the freewheel;

[0009] a sprocket moving mechanism communicatively connected to the main controller, the sprocket moving mechanism being configured to drive the sprocket to move along the central shaft in the axial direction.

[0010] The bicycle according to the second aspect of the present application comprises the adaptive bicycle gear shifting system according to the first aspect.

[0011] The adaptive bicycle gear shifting system and the bicycle according to the present application can determine the riding state of the rider by the torque detection unit and the pedaling frequency detection unit. The main controller is connected to the freewheel gear shifting device, so that the main controller has the ability to control the gear shifting of the freewheel gear shifting device. The sprocket mechanism is adjusted from the traditional fixed type to the form of moving along the central shaft. The angle between the chain and the sprocket can be kept as small as possible after the gear shifting is completed. Finally, the rider can ride more comfortably and efficiently during the riding process.

[0012] 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

[0013] 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:

[0014] Figure 1 An electrical system diagram of the adaptive bicycle shifting system provided for the embodiments of the present application;

[0015] Figure 2 A schematic diagram of the overall structure of the tooth disc moving mechanism provided for the embodiments of the present application;

[0016] Figure 3 A partial sectional view of the tooth disc moving mechanism provided for the embodiments of the present application.

[0017] Reference Signs:

[0018] 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;

[0019] Middle shaft 200;

[0020] Shaft sleeve 300;

[0021] Electric drive mechanism 410; drive motor 411; speed reducer 412; electric control module 413; wireless communication module 414; wireless power storage module 415; drive lead screw 420; moving part 430;

[0022] Assembly seat 500;

[0023] Frame 600;

[0024] Tooth disc 700;

[0025] Crank connecting shaft 800;

[0026] Flywheel 900;

[0027] 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

[0028] The embodiments of the present application will be described in detail below with reference to the drawings, examples of which 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 examples for explaining the present application, and should not be understood as limiting the present application.

[0029] In the description of the present application, if there is a description to first, second, etc., it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0030] In the description of the present application, it should 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, which is only for the convenience of describing the present application and simplifying the description, and should not be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0031] In the description of the present application, it should 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.

[0032] The technical solutions of the present application will be described below in conjunction with the drawings, obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0033] Referring to Figure 1 An adaptive bicycle shifting system provided by an embodiment of the present application, the adaptive bicycle shifting system comprises:

[0034] The torque detection unit 1010 is configured to detect the output torque of the human body pedaling;

[0035] The pedaling frequency detection unit 1020 is configured to detect the pedaling frequency of the human body pedaling the crank;

[0036] The main controller 1030 is electrically connected with the torque detection unit 1010 and the pedaling frequency detection unit 1020, respectively;

[0037] The freewheel shifting device is electrically connected with the main controller 1030, and is configured to adjust the gear position of the freewheel 900;

[0038] The tooth disc moving mechanism is in communication connection with the main controller 1030, and the tooth disc moving mechanism is configured to drive the tooth disc 700 to move axially along the central shaft 200.

[0039] In the embodiments of the present application, the torque detection unit 1010 and the pedal frequency detection unit 1020 are provided to determine the riding state of the rider, and the main controller 1030 is connected to the freewheel gear shifting device, so that the main controller 1030 has the ability to control the gear shifting of the freewheel gear shifting device, and further can complete the adaptive adjustment of the gear position of the freewheel 900 during the rider's riding. 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.

[0040] The torque detection unit 1010 can be a torque sensor, a stress sensor, etc., which can be installed at the crank, the central shaft, etc., to realize the detection of the torque formed by the rider pedaling the crank.

[0041] The pedal 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 pedal frequency of the rider.

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

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

[0044] The 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 can adopt other forms of freewheel 900 gear shifting mechanism that can be controlled by the main controller 1030. For example, the common electric freewheel gear shifting 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 torque and pedaling frequency of the rider can be effectively judged whether the rider is currently in a more laborious state, and then when the human body is laborious, the sprocket 900 is controlled to shift up, and when it is too easy, the sprocket 900 is controlled to shift down. How to determine the riding state by using torque and pedaling frequency, the specific way can be more, 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 judged whether it is in a more ideal riding state, for example, the product can be greater than the pre-set threshold or threshold range to shift up, and less than the pre-set threshold or threshold range to shift down, of course, a weight factor can be further introduced, and the torque and pedaling frequency are weighted to obtain a better calculation value for the pre-set threshold or threshold range for judgment (the product can be understood as the calculation value), and then the calculation value and the pre-set threshold or threshold range are used to complete the judgment, the specific way can be more, and the specific way is selected by the user according to the actual demand.

[0046] In addition, further considering the scene that the tooth disc moving mechanism can drive the tooth disc 700 to move axially along the middle shaft 200, the tooth disc 700 is controlled to move axially along the middle shaft 200 before or after or at the same time as the main controller 1030 controls the sprocket shift device to complete the gear shifting, so that the angle between the chain and the tooth disc 700 can be reduced as much as possible after the sprocket 900 shifts, so as to improve the riding experience of the rider to the greatest extent.

[0047] It can be understood that the tooth disc 700 can move axially along the middle shaft 200, which means that the middle shaft 200 has a space reserved for the tooth disc 700 to move.

[0048] The tooth disc moving mechanism can realize the driving of the tooth disc 700 to move axially along the middle shaft 200 in many ways.

[0049] For example, the toothed disc moving mechanism can include a shaft sleeve 300, an extension mechanism, an electric control driving unit, the shaft sleeve 300 is sleeved on the middle shaft 200 and can move along the axial direction of the middle shaft 200, the shaft sleeve 300 is relatively fixed with the middle shaft 200 in the circumferential direction of the middle shaft 200; the toothed disc 700 is arranged on the shaft sleeve 300; the extension mechanism is located outside the middle shaft 200 and is connected to the shaft sleeve 300 and / or the toothed disc 700; the electric control driving unit is arranged on the frame 600 and is used to drive the extension mechanism to operate, so that the extension mechanism drives the shaft sleeve 300 to move along the axial direction of the middle shaft 200, and the shaft sleeve 300 can rotate relative to the extension mechanism. Then, the main controller 1030 can send a command for driving the toothed disc 700 to move to the electric control driving unit, so as to control the movement of the toothed disc 700. There are many ways for the toothed disc 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.

[0050] The extension mechanism can be a hydraulic cylinder, an air cylinder, an electric push rod or the like, and the electric control driving unit is an electric driving device matched with the hydraulic cylinder, the air cylinder or the electric push rod.

[0051] In some embodiments, with reference to Figure 1 The adaptive bicycle gear shifting system further comprises:

[0052] The human-computer interaction unit 1040 is in communication connection with the main controller 1030.

[0053] 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 arranged to adjust the pre-set threshold value or threshold value range, so as to better meet the use requirements of different riders.

[0054] It should be noted that in the case of other intelligent terminals, the rider can also transmit a command 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.

[0055] In some embodiments, the torque detection unit 1010 is arranged on the crank and / or the toothed disc 700 and / or the middle shaft 200; and / or,

[0056] The pedaling frequency detection unit 1020 is arranged on the crank and / or the toothed disc 700 and / or the middle shaft 200.

[0057] The torque detection unit 1010 is arranged on the crank, the toothed disc 700 or the middle shaft 200, and theoretically, the torque can be detected. Although the values directly detected at different positions can be different, they can be pre-processed through simple mathematical operations to obtain an output torque that can represent the output torque formed by the rider pedaling the pedal.

[0058] The torque detection unit 1010 can include multiple torque sensors, in which case, torque sensors can be arranged at multiple positions of the crank, the chainring 700, and the middle shaft 200. Subsequently, after normalization processing, mean value calculation can be performed to obtain the most accurate torque and eliminate errors caused by individual sensor collection.

[0059] The torque detection unit 1010 can be arranged on the crank, the chainring 700, or the middle shaft 200, and theoretically, torque detection can be achieved. Although the values directly detected at different positions are different, they can be obtained by simple preprocessing to represent the torque formed by the rider pedaling the pedal.

[0060] The pedal frequency detection unit 1020 can include multiple pedal frequency sensors, in which case, pedal frequency sensors can be arranged at multiple positions of the crank, the chainring 700, and the middle shaft 200. Subsequently, after normalization processing, mean value calculation can be performed to obtain the most accurate pedal frequency and eliminate errors caused by individual sensor collection.

[0061] In some embodiments, with reference to Figure 1 The adaptive bicycle gear shifting system further comprises:

[0062] The lactic acid detection device 1050 is in communication connection with the main controller 1030 and is configured to detect the lactic acid of the human body; and / or,

[0063] The heart rate detection device 1060 is in communication connection with the main controller 1030 and is configured to detect the heart rate of the human body.

[0064] In this embodiment, considering that the state of lactic acid and heart rate can effectively reflect the functional state of the human body, the lactic acid detection device 1050 is introduced to detect the lactic acid of the rider, and the heart rate detection device 1060 is introduced to detect the heart rate, so that when the lactic acid is high and the heart rate is high, the gear can be lowered in time to avoid injury to the rider.

[0065] In addition, the lactic acid detected by the lactic acid detection device 1050 and / or the heart rate detected by the heart rate detection device 1060 can also be comprehensively considered with the pedal frequency and torque obtained as described above. For example, the product of three or four, and the calculation value of the weighted calculation result of three or four can be used for gear control. The specific control mode can refer to the pedal frequency and torque control mode described above.

[0066] In some embodiments, the adaptive bicycle gear shifting system further comprises:

[0067] The blood pressure detection device 1070 is in communication connection with the main controller 1030 and is configured to detect the blood pressure of the human body.

[0068] In this embodiment, the state of blood pressure can effectively reflect the function state of the human body, and the 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.

[0069] 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 can be used, and the calculated value of the result of the weighted calculation of the three can be used to control the gear, and the specific control mode can refer to the aforementioned cadence and torque control mode.

[0070] It should be noted that the three of lactic acid, heart rate and blood pressure can be selectively combined with cadence and torque according to actual needs, one of them can be selected, or multiple parameters can be selected, when multiple parameters are selected, multiple parameters can be comprehensively considered with the aforementioned acquired cadence and torque, for example, the product of all selected parameters can be used, and the calculated value of the result of the weighted calculation of all selected parameters can be used to control the gear, and the specific control mode can refer to the aforementioned cadence and torque control mode.

[0071] 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 main controller 1030 through wireless communication by the smart wearable device.

[0072] The aforementioned lactic acid detection device 1050, heart rate detection device 1060 and blood pressure detection device 1070 can directly use mature products on the market.

[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 provided with separate detection modules, which can be connected to the main controller 1030 through data lines, and the detection modules can be installed on the rider during use, and can be hung on the bicycle when not in use.

[0074] In some embodiments, the tooth disc moving mechanism comprises:

[0075] The shaft sleeve 300 is movably sleeved on the middle shaft 200 and 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;

[0076] The electric drive 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.

[0077] In this embodiment, the movable sleeve 300 is arranged on the central shaft 200, and the tooth disc 700 is arranged on the sleeve 300. Then, the sleeve 300 is driven to move along the central shaft 200 by the electric drive unit, so that the tooth disc 700 can move along the central shaft 200. Finally, when the bicycle freewheel 900 changes the gear position, the tooth disc 700 is driven by the electric drive unit to adapt to the change of the bicycle gear position, so that the included angle between the chain and the tooth disc 700 is effectively reduced, 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 wear of the asymmetric tooth part, reduce the axial force of the tooth part, and is beneficial to reduce the deformation of the tooth, thereby prolonging the service life.

[0078] The sleeve 300 is arranged on the central shaft 200 and can move along the central shaft 200. After the tooth disc 700 is fixed on the sleeve 300, the tooth disc 700 can move along the central shaft 200, so as to adjust the relative position of the tooth disc 700 and the central shaft 200.

[0079] The central shaft 200 is arranged on the frame 600 through the bearing system, so that the sleeve 300 can rotate with the central shaft 200 to realize rotation.

[0080] The crank connecting shaft 800 can be arranged at both ends of the central shaft 200 to connect the crank. The rider rotates the crank to drive the central shaft 200 to rotate, and then drives the sleeve 300 to rotate.

[0081] The maximum moving range of the sleeve 300 on the central shaft 200 in the axial direction of the central shaft 200 can be adaptively adjusted according to the length of the central shaft 200. Specifically, referring to Figure 2 , Figure 3 The maximum moving distance can be constrained by the length of the central shaft 200 and the position of the frame 600, or a separate limiting mechanism can be arranged to limit the moving range of the sleeve 300.

[0082] The length of the sleeve 300 can be flexibly adjusted according to actual needs. For example, as shown in Figure 3 , when the designed length is longer, the sleeve 300 can be extended between the bearing system and the central shaft 200. When the designed length is shorter, the sleeve 300 can not be extended between the bearing system and the central shaft 200, and the whole is kept outside the bearing system. It should be noted that the sleeve 300 has advantages in length. When the driving demand of the tooth disc 700 is small, the sleeve 300 with shorter length can be considered.

[0083] In some scenarios, the length of the sleeve 300 can be considered to be 1.2 to 3 times the moving stroke of the tooth disc 700.

[0084] The electric drive unit can drive the shaft sleeve 300 to move, so as to adjust the relative position of the tooth disc 700 and the middle shaft 200, and then adjust the relative position between the tooth disc 700 and the flywheel 900, and finally adjust the included angle between the chain and the tooth disc 700.

[0085] The electric drive unit can be arranged in the middle shaft 200 or outside the middle shaft 200, and the specific arrangement position can be flexibly adjusted according to actual needs, and the drive shaft sleeve 300 can be driven to move.

[0086] The electric drive unit is connected with the main controller 1030, and then adjusts the position of the tooth disc according to the control signal sent by the main controller 1030.

[0087] The electric drive unit is a driving adjustment mechanism, so it can also limit the movement of the shaft sleeve 300, that is, the shaft sleeve 300 will not move passively due to the traction of the chain, thereby improving the stability of riding.

[0088] In some embodiments, the middle shaft 200 is provided with a mounting cavity in the axial direction, and a first key groove is formed in the outer peripheral wall of the middle shaft 200 and communicates with the mounting cavity.

[0089] The electric drive unit includes:

[0090] The electric drive mechanism 410 is electrically connected with the main controller 1030 and is located in the mounting cavity away from the tooth disc 700.

[0091] The drive screw 420 is located in the mounting cavity close to the tooth disc 700, and one end of the drive screw 420 is connected with the electric drive mechanism 410.

[0092] The moving part 430 is threadedly connected with the drive 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 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 as to drive the shaft sleeve 300 to move along the middle shaft 200.

[0093] The mounting cavity is arranged in the middle shaft 200 in the axial direction, and the electric drive unit can be arranged in the mounting cavity.

[0094] The middle shaft 200 is provided with a crank connecting shaft 800 at both ends, a through hole is formed in the crank connecting shaft 800 away from the shaft sleeve 300 and along the axial direction of the middle shaft 200, so as to communicate with the mounting cavity, and a wiring seat electrically connected with the electric drive unit can be arranged in the through hole, so as to charge the electric drive unit and / or perform data transmission operation.

[0095] The mounting 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 driving mechanism 410 can be arranged in the first chamber, and the driving lead screw 420 and the moving piece 430 can be arranged in the second chamber, so as to separate the electrical part structure, and reduce the possibility of damage to the electrical part structure caused by the external environment during use.

[0096] 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 in a strip shape, and the length direction is consistent with the axial direction of the middle shaft 200, so as to connect the moving piece 430 with the shaft sleeve 300, and also allow the moving piece 430 to slide along the first key groove. At the same time, the arrangement of the first key groove can effectively prevent the shaft sleeve 300 from rotating relative to the middle shaft 200.

[0097] 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 arrangement of multiple first key grooves can increase the stability between the moving piece 430 and the shaft sleeve 300. Figure 3 As shown in the figure, the middle shaft 200 is provided with two first key grooves. The upper part and the lower part of the inner wall of the shaft sleeve 300 are connected with the moving piece 430 through the first key grooves.

[0098] The electric driving mechanism 410 is arranged on one side of the mounting cavity, and the moving piece 430 is arranged on the other side of the mounting cavity. The electric driving mechanism 410 and the moving piece 430 are connected through the driving lead screw 420, so that the electric driving mechanism 410 can drive the moving piece 430 to move along the axial direction of the middle shaft 200 through the driving lead screw 420, and then drive the shaft sleeve 300 and / or the toothed disc 700 to move through the moving piece 430.

[0099] The moving piece 430 can be a nut, or other base with a threaded hole structure.

[0100] In this embodiment, the electric driving mechanism 410 can drive the lead screw 420 to rotate, and then drive the moving piece 430 to move along the axial direction of 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. At the same time, the electric driving mechanism 410 can realize accurate control of the moving position of the shaft sleeve 300, and also can 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.

[0101] In some embodiments, the driving screw 420 described above can be replaced by a hydraulic cylinder, and the electric driving mechanism 410 can be replaced by a controlled hydraulic driving system, which can also drive the moving part. In the case of a large volume of hydraulic driving system, the hydraulic driving system can be arranged outside the shaft, and the hydraulic driving system is connected to the hydraulic cylinder arranged in the mounting cavity through the oil pipe, which can 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 driving system are connected through a hydraulic rotary joint, so that the external hydraulic driving system does not affect the rotation ability of the shaft.

[0102] In some embodiments, referring to Figure 3 , the electric driving mechanism 410 comprises:

[0103] The driving motor 411 is arranged in the mounting cavity;

[0104] The speed reducer 412 is arranged in the mounting cavity and located between the driving motor 411 and the tooth disc 700, and the speed reducer 412 is used to drive the driving screw 420 to rotate;

[0105] The electric control module 413 is arranged in the mounting cavity and electrically connected with the driving motor 411.

[0106] The driving motor 411, the speed reducer 412 and the driving screw 420 described above are arranged in the mounting cavity in sequence.

[0107] The driving motor 411 described above can be connected to the external main controller 1030 through the through hole arranged on the crank connecting shaft 800, and the control of the driving motor 411 can be directly completed by the external main controller 1030. The driving motor 411 described above can also be connected with the main controller 1030 through the electric control module 413 arranged in the mounting cavity, and the control of the driving motor 411 can be indirectly completed by the main controller 1030 through the electric control module 413.

[0108] The speed reducer 412 described above can provide a larger torque to improve the driving ability of the driving screw 420.

[0109] In some embodiments, referring to Figure 1 , Figure 3 The electric driving mechanism 410 further comprises:

[0110] The wireless communication module 414 is arranged in the mounting cavity and electrically connected with the electric control module 413;

[0111] 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 driving motor 411.

[0112] The wireless communication module 414 described above can realize wireless communication with the outside world.

[0113] The wireless communication module 414 can be Bluetooth, WIFI, etc. The specific selection can be made according to actual needs.

[0114] The wireless power storage module 415 can directly use a lithium battery. The use of the wireless power storage module 415 can make the electric control module 413, the wireless communication module 414, and the driving motor 411 run without relying on an external power supply, thereby reducing or even eliminating fixed wiring, improving the applicability of the adaptive bicycle shifting system, and reducing the installation difficulty of the adaptive bicycle shifting system.

[0115] The driving motor 411 can also be wirelessly connected to the main controller 1030 through the wireless communication module 414 arranged in the installation cavity. The main controller 1030 transmits instructions to the wireless communication module 414 through wireless communication, and then the wireless communication module 414 transmits the instructions to the electric control module 413, thereby indirectly controlling the driving motor 411. The specific control method needs to be adjusted according to actual application needs. That is, the electric control module 413 and the wireless communication module 414 can be optional modules.

[0116] In some embodiments, referring to Figures 2-3 The speed reducer 412, the driving motor 411, the electric control module 413, the wireless communication module 414, and the wireless power storage module 415 can be arranged as a motor assembly. By arranging in an assembly structure, installation and later maintenance can be quickly performed.

[0117] In some embodiments, the bearing system includes:

[0118] 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 tooth disc 700. The first bearing 110 is also used to limit the axial movement of the middle shaft 200.

[0119] In this embodiment, the first bearing 110 can be used to realize the rotation of the middle shaft 200, meeting the rotation requirement of the middle shaft 200. At the same time, in this embodiment, the first bearing 110 has a limiting function, so that when the driving shaft sleeve 300 moves, the middle shaft 200 will not move.

[0120] When the first bearing 110 is used to limit the axial movement of the middle shaft 200, a limiting protruding block can be arranged on the middle shaft 200 for cooperation. Figure 3As shown, a limiting protruding block is arranged on the outer peripheral wall of the middle shaft 200 at the part close to the shaft sleeve 300 of the first bearing 110 to provide a restriction in one direction, and an axial locking structure 130 is arranged at the part away from the shaft sleeve 300 of the first bearing 110 to realize the restriction of the first bearing 110 in the other direction, thus completing the restriction of the back-and-forth movement of the middle shaft 200 in the axial direction. A first locking screw plug 140 is arranged on the frame 600 or the assembly seat 500 at the part away from the shaft sleeve 300 of the first bearing 110 to realize the fixation of the first bearing 110.

[0121] The axial locking structure 130 can be directly realized by an axial locking nut.

[0122] After the installation of the axial locking structure 130, if there is a gap between the frame 600, a first sealing ring 150 can be added for sealing.

[0123] In some embodiments, the first bearing 110 can be a ball bearing.

[0124] In the present embodiment, the ball bearing has a strong axial bearing capacity, which can better bear the axial force of the movement of the tooth disc 700, and the ball bearing can better fix the middle shaft 200.

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

[0126] A second bearing 120 is arranged close to the tooth disc 700 to rotate the shaft sleeve 300.

[0127] In the present 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.

[0128] In some embodiments, the second bearing 120 is a needle bearing.

[0129] In the present embodiment, the second bearing 120 is a needle bearing, which can better improve the rotation and movement of the shaft sleeve 300.

[0130] In some embodiments, the second bearing 120 can also be a ball bearing or formed by a plurality of ball bearings.

[0131] In some embodiments, a second locking screw plug 160 can be arranged on the frame 600 or the assembly seat 500 at the part close to the tooth disc 700 of the second bearing 120 to fix the needle bearing. After the installation of the second bearing 120, if there is a gap between the frame 600, a second sealing ring 170 can be added for sealing.

[0132] In some embodiments, the second key groove is formed on the outer circumferential wall of the middle shaft 200 and is arranged along the axial direction of the middle shaft 200, and the sliding key is arranged on the inner circumferential wall of the shaft sleeve 300 and is slidable along the second key groove.

[0133] The second key groove can limit the sliding direction of the sliding key, so that the movement of the shaft sleeve 300 is smoother, and the shaft sleeve 300 can also be provided with a certain limit ability of rotating along the circumferential direction of the middle shaft 200.

[0134] 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.

[0135] In some embodiments, the adaptive bicycle gear shifting system further comprises:

[0136] 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.

[0137] In the embodiment, the bearing system is arranged in the assembly seat 500, so that the entire adaptive bicycle gear shifting system can be arranged as an assembly structure, and the entire adaptive bicycle gear shifting system can be quickly installed and replaced through the assembly seat 500, thereby improving the use experience of the rider.

[0138] The application also provides a bicycle comprising the adaptive bicycle gear shifting system as described above. Because the bicycle comprises the adaptive bicycle gear shifting system, the bicycle has all the beneficial effects of the adaptive bicycle gear shifting system.

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

Claims

1. An adaptive bicycle shifting system, characterized in that, The adaptive bicycle gear shifting system comprises: a torque detection unit for detecting the output torque of the human body pedaling; a pedaling frequency detection unit for detecting the pedaling frequency of the human body pedaling the crank; a main controller electrically connected with the torque detection unit and the pedaling frequency detection unit respectively; a flywheel gear shifting device electrically connected with the main controller for adjusting the gear of the flywheel; a toothed disc moving mechanism in communication with the main controller, the toothed disc moving mechanism being used to drive the toothed disc to move along the middle shaft in the axial direction.

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

3. The adaptive bicycle shifting system of claim 1, wherein, The torque detection unit is arranged on the crank and / or the toothed disc and / or the middle shaft; and / or The pedaling frequency detection unit is arranged on the crank and / or the toothed disc and / or the middle shaft.

4. The adaptive bicycle shifting system of claim 1, wherein, The adaptive bicycle gear shifting system further comprises: a lactic acid detection device in communication with the main controller for detecting the lactic acid of the human body; and / or a heart rate detection device in communication with the main controller for detecting the heart rate of the human body.

5. The adaptive bicycle shifting system of claim 1 or 4, wherein, The adaptive bicycle gear shifting system further comprises: a blood pressure detection device in communication with the main controller for detecting the blood pressure of the human body.

6. The adaptive bicycle shifting system of claim 1, wherein, The toothed disc moving mechanism comprises: a shaft sleeve movably sleeved on the middle shaft and located on the side of the middle shaft close to the toothed disc, the toothed disc being arranged on the shaft sleeve; an electric drive unit in communication with the main controller for driving the shaft sleeve to move along the middle shaft in the axial direction.

7. The adaptive 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 electric drive unit comprises: an electric drive mechanism electrically connected with the main controller and located on the side of the installation cavity away from the toothed disc; a drive screw rod located on the side of the installation cavity close to the toothed disc, one end of the drive screw rod being connected with the electric drive mechanism; a moving piece threadedly connected with the drive screw rod, the moving piece being connected with the shaft sleeve and / or the toothed disc through the first key groove, the electric drive mechanism being used to drive the drive 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 adaptive bicycle shifting system of claim 7, wherein, The electric drive mechanism comprises: a drive motor arranged in the installation cavity; a speed reducer arranged in the installation cavity and located between the drive motor and the toothed disc, the speed reducer being used to drive the drive screw rod to rotate; an electric control module arranged in the installation cavity and electrically connected with the drive motor.

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

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

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