Self-adaptive speed control system and bicycle

Abstract

According to the self-adaptive speed change system and the bicycle, the riding state of a rider can be determined by arranging a pedaling frequency detection unit and a torque detection unit, a main controller is connected to a flywheel speed change device, so that the main controller has the capability of adjusting the gear of a flywheel, and the speed change efficiency of the bicycle is improved. Self-adaptive adjustment of the flywheel gear can be completed based on the riding state in the riding process of the rider, and the riding efficiency of the rider is improved; meanwhile, the movable shaft sleeve is arranged on the middle shaft, and the chain wheel is arranged on the shaft sleeve, so that the chain wheel can be driven by the electric control driving unit to adaptively adjust along with the gear change of the bicycle when the gear change of the flywheel of the bicycle is carried out, and the included angle between the chain and the chain wheel is effectively reduced; therefore, the riding efficiency is further improved.

Description

TECHNICAL FIELD

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

[0002] At present, the manual gear shifting of the variable speed bicycle is required in the riding. No matter the slope changes or the speed adjustment, the rider has to judge when to shift gears by experience. This requires a high experience reserve for the rider, and the novice often has difficulty in controlling it. Once the gear shifting is wrong, the riding will be obviously interrupted, the rider's physical consumption will be increased, the riding efficiency will be reduced, and the experience will be poor. Moreover, when the gear shifting is performed, the angle between the sprocket and the chain is easily too large in many gear positions, the riding efficiency is low, and the overall feeling of the riding is further deteriorated. CONTENT OF THE UTILITY MODEL

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

[0004] The adaptive 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, respectively;

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

[0009] an electric sprocket device comprising a middle shaft, a shaft sleeve, an extension mechanism and an electric control driving unit; the middle shaft is configured to be rotatably installed on the frame; the shaft sleeve is sleeved on the middle shaft and can move along the axial direction of the middle shaft, the shaft sleeve and the middle shaft are relatively fixed in the circumferential direction of the middle shaft, and the sprocket is arranged on the shaft sleeve; the extension mechanism is arranged in the middle shaft and connected to the shaft sleeve and / or the sprocket; the electric control driving unit is arranged on the frame and configured to drive the extension mechanism to operate, so that the extension mechanism drives the shaft sleeve to move along the axial direction of the middle shaft through extension and retraction, the shaft sleeve can rotate relative to the extension mechanism, and the electric control driving unit is electrically connected to the main controller.

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

[0011] The adaptive speed change system and the bicycle provided by the embodiment of the present application can determine the riding state of the rider by setting the pedal frequency detection unit and the torque detection unit, can make the main controller have the ability to adjust the gear position of the freewheel by connecting the main controller to the freewheel speed change device, and can then complete the adaptive adjustment of the gear position of the freewheel based on the riding state during the rider's riding process, thereby improving the riding efficiency of the rider. Meanwhile, by setting the movable shaft sleeve on the middle shaft and the tooth disc on the shaft sleeve, the tooth disc can be adaptively adjusted by the electric control driving unit to follow the gear position change of the bicycle when the gear position of the bicycle freewheel changes, so as to effectively reduce the included angle between the chain and the tooth disc, thereby further improving the riding efficiency.

[0012] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[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 speed change system provided by the embodiment of the present application;

[0015] Figure 2 A schematic diagram of the overall structure of the electric tooth disc device provided by the embodiment of the present application;

[0016] Figure 3 A partial sectional view of the electric tooth disc device provided by the embodiment of the present application.

[0017] Reference Signs:

[0018] Middle shaft 100; mounting cavity 101; let-out slot 102; limiting protrusion 103;

[0019] Shaft sleeve 200;

[0020] Tooth disc 300;

[0021] Telescopic mechanism 400; connecting piece 401;

[0022] First bearing 500; axial locking structure 501; first locking plug 502; first sealing ring 503;

[0023] Second bearing 600; second locking plug 601; second sealing ring 602;

[0024] Assembly seat 700; mounting hole 701; let-out cavity 702;

[0025] Frame 800;

[0026] First medium delivery pipe 900; Second medium delivery pipe 901; Electrically controlled drive unit 902; Rotary joint 903;

[0027] Crankshaft connecting shaft 1000;

[0028] Flywheel 1100;

[0029] Main controller 1201; position detection unit 1202; wireless communication module 1203; torque detection unit 1204; cadence detection unit 1205; human-machine interaction unit 1206; lactic acid detection device 1207; heart rate detection device 1208; blood pressure detection device 1209. Detailed Implementation

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

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

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

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

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

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

[0036] The torque detection unit 1204 is used to detect the output torque of human stepping.

[0037] The pedal frequency detection unit 1205 is configured to detect the pedal frequency of the human body pedaling the crank;

[0038] The main controller 1201 is electrically connected to the torque detection unit 1204 and the pedal frequency detection unit 1205, respectively.

[0039] The flywheel speed change device is connected to the main controller 1201 and is configured to adjust the gear position of the flywheel 1100.

[0040] The electric toothed disc device comprises a middle shaft 100, a shaft sleeve 200, an extension mechanism 400, and an electric control driving unit 902. The middle shaft 100 is configured to rotate and is installed on the frame 800. The shaft sleeve 200 is sleeved on the middle shaft 100 and can move along the axial direction of the middle shaft 100. The shaft sleeve 200 is fixed relative to the middle shaft 100 in the circumferential direction of the middle shaft 100. The toothed disc 300 is arranged on the shaft sleeve 200. The extension mechanism 400 is arranged in the middle shaft 100 and is connected to the shaft sleeve 200 and / or the toothed disc 300. The electric control driving unit 902 is arranged on the frame 800 and is configured to drive the extension mechanism 400 to operate, so that the extension mechanism 400 drives the shaft sleeve 200 to move along the axial direction of the middle shaft 100. The shaft sleeve 200 can rotate relative to the extension mechanism 400. The electric control driving unit 902 is electrically connected to the main controller 1201.

[0041] In the embodiments of the present application, the pedal frequency detection unit 1205 and the torque detection unit 1204 are arranged to determine the riding state of the rider. The main controller 1201 is connected to the flywheel speed change device, so that the main controller 1201 has the ability to adjust the gear position of the flywheel 1100. Thus, the main controller 1201 can adaptively adjust the gear position of the flywheel 1100 based on the riding state of the rider during the riding process, thereby improving the riding efficiency of the rider. Meanwhile, the movable shaft sleeve 200 is arranged on the middle shaft 100, and the toothed disc 300 is arranged on the shaft sleeve 200. Thus, when the gear position of the bicycle flywheel 1100 changes, the electric control driving unit 902 is used to drive the toothed disc 300 to adaptively adjust the toothed disc 300 according to the change of the gear position of the bicycle, so that the included angle between the chain and the toothed disc 300 is effectively reduced, thereby further improving the riding efficiency.

[0042] The torque detection unit 1204 can be a torque sensor, a stress sensor, etc. The torque detection unit 1204 can be installed on the crank, the middle shaft 100, etc. to detect the torque formed by the rider pedaling the crank.

[0043] The pedal frequency detection unit 1205 can be a pressure sensor, an angular velocity sensor, an optical sensor, a contact sensor, etc. The pedal frequency detection unit 1205 can directly detect the rotation frequency of the crank, the toothed disc 300, etc. to determine the pedal frequency of the rider.

[0044] The main controller 1201 can directly obtain the output torque collected by the torque detection unit 1204 and the pedaling frequency collected by the pedaling frequency detection unit 1205 after being electrically connected to the torque detection unit 1204 and the pedaling frequency detection unit 1205.

[0045] The main controller 1201 can control the freewheel gear shifting device to adjust the gear of the freewheel 1100 after being electrically connected to the freewheel gear shifting device.

[0046] The freewheel gear shifting device can directly use a mature electric freewheel 1100 gear shifting mechanism on the market, or use other forms of freewheel 1100 gear shifting mechanism that can be controlled by the main controller 1201. For example, a common electric freewheel 1100 gear shifting mechanism can start gear shifting operation by giving a simple control instruction.

[0047] It should be noted that the torque can reflect the force state of the rider when riding, and generally the more force, the greater the torque. 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 rider's current state of riding can be effectively determined by comprehensively considering the torque and the pedaling frequency, and the freewheel 1100 can be controlled to shift up when the human body is in a state of effort, and the freewheel 1100 can be controlled to shift down when the human body is in a state of ease. How to determine the riding state by using torque and pedaling frequency can be achieved in many ways. For example, the product of torque and pedaling frequency can be directly used to determine whether the rider is in an ideal riding state based on the product and a pre-set threshold or threshold range. 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 to perform weighted operation on the torque and the pedaling frequency, 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. The calculation value and the pre-set threshold or threshold range can be used to determine the ideal riding state. The specific implementation can be achieved in many ways, and the user can select the specific implementation according to actual needs.

[0048] The middle shaft 100 can be installed on the frame 800 through the assembly seat 700. Specifically, the assembly seat 700 can be installed with a bearing system, and the middle shaft 100 is installed on the bearing system to enable the middle shaft 100 to rotate. In addition, the two ends of the middle shaft 100 can be provided with crank connecting shafts 1000 for connecting cranks, and the cranks are used to install pedals. The user of the bicycle rotates the cranks through the pedals, and then drives the middle shaft 100 to rotate.

[0049] The shaft sleeve 200 is sleeved outside the middle shaft 100 and is movable along the middle shaft 100. After the tooth disc 300 is fixed on the shaft sleeve 200, the tooth disc 300 can move along the middle shaft 100, so as to adjust the relative position of the tooth disc 300 and the middle shaft 100. The shaft sleeve 200 and the middle shaft 100 are relatively fixed in the circumferential direction, so that when the middle shaft 100 rotates, the shaft sleeve 200 can be driven to rotate, thereby driving the tooth disc 300 to rotate.

[0050] In addition, the length of the shaft sleeve 200 can be flexibly adjusted according to actual needs. For example, as shown in Figure 3 the design length is longer, the shaft sleeve 200 can be extended to between the middle shaft 100 and the bearing system for mounting the middle shaft 100, and when the design length is shorter, the shaft sleeve 200 can not be extended to between the middle shaft 100 and the bearing system for mounting the middle shaft 100, and the whole is kept outside the bearing system. It should be noted that the shaft sleeve 200 has advantages in length. When the demand for moving and driving the tooth disc 300 is small, the shaft sleeve 200 with shorter length can be considered.

[0051] The above-mentioned telescopic mechanism 400 is installed in the middle shaft 100. The telescopic mechanism 400 can be connected to the shaft sleeve 200, or connected to the tooth disc 300, or connected to both the shaft sleeve 200 and the tooth disc 300. The telescopic direction of the telescopic mechanism 400 can be the axial direction of the middle shaft 100, or slightly deviated from the axial direction of the middle shaft 100. The telescopic mechanism 400 can drive the shaft sleeve 200 to move by its own telescopic function, thereby adjusting the relative position of the tooth disc 300 and the middle shaft 100, and further adjusting the relative position of the tooth disc 300 and the flywheel 1100, so as to adjust the included angle between the chain and the tooth disc 300.

[0052] The above-mentioned electric control driving unit 902 can drive the telescopic mechanism 400 to operate, so as to make the telescopic mechanism 400 telescopic to drive the shaft sleeve 200 and / or the tooth disc 300 to move, so as to adjust the relative position of the tooth disc 300 and the flywheel 1100, thereby adjusting the included angle between the chain and the tooth disc 300.

[0053] The above-mentioned electric control driving unit 902 is controlled by the main controller 1201, that is, the electric control driving unit 902 can be operated by the main controller 1201 to work.

[0054] Specifically, the electric control driving unit 902 also has different settings according to the type of the telescopic mechanism 400. For example, when the telescopic mechanism 400 is a hydraulic cylinder, the electric control driving unit 902 can be a hydraulic driving system, and the main controller 1201 drives the telescopic movement of the piston rod of the hydraulic cylinder by adjusting the injection of the hydraulic driving system into the rodless cavity and the rod cavity of the hydraulic cylinder. When the telescopic mechanism 400 is a pneumatic cylinder, the electric control driving unit 902 can be a pneumatic driving system, and the main controller 1201 adjusts the working state of the pneumatic cylinder by adjusting the inflation state of the pneumatic driving system. When the telescopic mechanism 400 is an electric push rod, the electric control driving unit 902 can be a power supply unit, and the main controller 1201 adjusts the telescopic state of the electric push rod by adjusting the power supply state of the power supply unit. In some scenarios, the power supply unit can only supply power, and the main controller 1201 directly sends a control signal to the electric push rod for telescopic control. The specific selection can be adjusted according to actual needs.

[0055] The main controller 1201 described above can also directly realize automatic adjustment of the position of the shaft sleeve 200, so that the tooth disc 300 is always in an optimal relative position with the flywheel 1100. For example, when there is no position detection function, the power-on time of the electric control driving unit 902 can be directly controlled to complete the position adjustment of the tooth disc 300. For example, power-on for 1S can move a displacement corresponding to one gear position. At the same time, in order to more accurately complete the displacement control of the tooth disc 300, the tooth disc 300 can be controlled to return to zero position (for example, the leftmost end or the rightmost end) after each use of the bicycle, so as to avoid cumulative errors.

[0056] The driving mechanism composed of the electric control driving unit 902 and the telescopic mechanism 400 can also realize the limitation of the movement of the shaft sleeve 200, that is, the shaft sleeve 200 will not passively move due to the traction of the chain, thereby improving the stability of riding.

[0057] In some embodiments, referring to Figure 1 The adaptive gear shifting system further comprises:

[0058] The human-computer interaction unit 1206 is in communication connection with the main controller 1201.

[0059] In the present 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 1206 can be additionally provided to adjust the pre-set threshold or threshold range, so as to better meet the use requirements of different riders.

[0060] It should be noted that in the case of other intelligent terminals, the rider can also transmit instructions to modify the pre-set threshold or threshold range to the main controller 1201 through other intelligent terminals to complete the adjustment of the pre-set threshold or threshold range.

[0061] In addition, the setting of the man-machine interaction unit 1206 can also enable the rider to understand some parameters related to the bicycle or the rider that can be displayed on the interaction interface, such as the position of the chainring, the gear position of the freewheel 1100, the pedaling frequency, the output torque, and the like.

[0062] In some embodiments, the torque detection unit 1204 is arranged on the crank and / or the chainring 300 and / or the bottom bracket 100; and / or,

[0063] The pedaling frequency detection unit 1205 is arranged on the crank and / or the chainring 300 and / or the bottom bracket 100.

[0064] The torque detection unit 1204 described above is arranged on the crank, the chainring 300, or the bottom bracket 100, and theoretically can achieve detection of the torque. Although the values directly detected by being arranged at different positions can be different, they can all be pre-processed through simple mathematical operations to obtain an output torque that can represent the pedaling of the rider.

[0065] The torque detection unit 1204 described above can include multiple torque sensors. In this case, torque sensors can be arranged at multiple positions in the crank, the chainring 300, and the bottom bracket 100. Subsequently, after normalization processing, mean value calculation can be performed to obtain a torque closest to the true torque and eliminate errors caused by a single sensor.

[0066] The torque detection unit 1204 described above is arranged on the crank, the chainring 300, or the bottom bracket 100, and theoretically can achieve detection of the torque. Although the values directly detected by being arranged at different positions can be different, they can all be pre-processed to obtain a torque that can represent the pedaling of the rider.

[0067] The pedaling frequency detection unit 1205 described above can include multiple pedaling frequency sensors. In this case, pedaling frequency sensors can be arranged at multiple positions in the crank, the chainring 300, and the bottom bracket 100. Subsequently, after normalization processing, mean value calculation can be performed to obtain a pedaling frequency closest to the true pedaling frequency and eliminate errors caused by a single sensor.

[0068] In some embodiments, referring to Figure 1 , the adaptive gear shifting system further comprises:

[0069] The lactate detection device 1207 is in communication connection with the main controller 1201 and is used for detecting human lactate; and / or,

[0070] The heart rate detection device 1208 is in communication connection with the main controller 1201, and is configured to detect the heart rate of the human body; and / or

[0071] The blood pressure detection device 1209 is in communication connection with the main controller 1201, and is configured to detect the blood pressure of the human body.

[0072] In this embodiment, considering that the state of lactic acid, heart rate and blood pressure can effectively reflect the functional state of the human body, the lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 are introduced to detect the lactic acid, heart rate and blood pressure of the rider, so that the gear can be lowered in time to avoid injury to the rider when the lactic acid, heart rate and blood pressure are high, and the gear can be raised when it is determined that the state of the rider is good, and the like.

[0073] It should be noted that in actual application, one or more of the lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can be selected according to actual needs, and multiple devices do not have to be selected at the same time.

[0074] In addition, it should be noted that the aforementioned process of determining the physical state or functional state of the rider by using the output torque and pedal frequency can be understood as follows: when one or more of the parameters of lactic acid, heart rate and blood pressure are added, the output torque and pedal frequency obtained in the foregoing can be comprehensively considered, for example, the product of three or more parameters, and the calculation value of the weighted calculation result of three or more parameters can be used to control the gear position, and the specific control mode can refer to the aforementioned torque and pedal frequency control mode. It can also be understood that any two parameters of torque, pedal frequency, lactic acid, heart rate and blood pressure can be directly used to control the gear shifting process.

[0075] The aforementioned lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can all be directly used as mature products on the market.

[0076] In some embodiments, the lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can all be arranged on a smart wearable device, and the collected data can be transmitted to the main controller 1201 through the smart wearable device by wireless communication.

[0077] In some embodiments, the lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can be provided in multiple numbers, so that the mean value can be calculated after multiple collection values are obtained, thereby avoiding errors caused by a single sensor sampling.

[0078] In some embodiments, referring to Figure 1 The electric toothbrush device further comprises:

[0079] The position detection unit 1202 is electrically connected to the main controller 1201, and is configured to obtain the position of the toothed disc 300 on the axle 100.

[0080] In this embodiment, the position detection unit 1202 can directly determine the current position of the toothed disc 300, and the main controller 1201 can further adjust the position of the toothed disc 300 according to the current gear position of the flywheel 1100. Generally, the toothed disc 300 corresponds to the gear corresponding to the current gear position of the flywheel 1100 as much as possible, so as to reduce the inclination angle of the chain.

[0081] The position detection unit 1202 can be in various forms, for example, a laser radar arranged on the frame 800 can be used to detect the distance between the frame 800 and the toothed disc 300, and then the position of the toothed disc 300 on the axle 100 can be determined by simple addition and subtraction operation. In addition, the detection can also be completed by using an ultrasonic sensor or other non-contact sensor. In addition, a displacement sensor can be used to directly detect the extension distance of the extension end of the telescopic mechanism 400. The specific detection method is various, and is not limited in the embodiment.

[0082] In some embodiments, the position detection unit 1202 includes a displacement sensor electrically connected to the main controller 1201, and the displacement sensor is configured to detect the extension distance of the extension end of the telescopic mechanism 400.

[0083] In this embodiment, the displacement sensor is used to directly detect the extension distance of the extension end of the telescopic mechanism 400, for example, the extension distance of the piston rod of the hydraulic cylinder or the extension distance of the screw rod of the electric push rod. This can effectively reduce the interference of external factors on the detection, improve the accuracy of the detection, and also effectively reduce the damage of external impact to the position detection unit 1202.

[0084] In some embodiments, the electric toothed disc device further comprises:

[0085] The power storage unit is configured to provide power for the electric control driving unit 902 and the main controller 1201.

[0086] In this embodiment, the power storage unit is directly used as a power supply, for example, a lithium battery or other storage battery is directly used. This can effectively improve the user experience, and the user does not need to use an external mobile power supply for power supply.

[0087] In some embodiments, the electric control driving unit 902 and the main controller 1201 can be powered by a mobile power supply.

[0088] In some embodiments, the electric toothed disc device further comprises:

[0089] The wireless communication module 1203 is electrically connected with the main controller 1201.

[0090] The wireless communication module 1203 can realize wireless communication with the outside world. For example, the current relative position of the pedal 300 can be transmitted to the outside world through the wireless communication module 1203, and the data collected by the main controller 1201 on the remaining bicycle can also be uploaded to the cloud for storage and record, so as to provide more in-depth services for users in the future.

[0091] The wireless communication module 1203 can be a Bluetooth, WIFI, etc. The specific selection can be made according to actual needs.

[0092] In some embodiments, the pedal device further comprises:

[0093] The assembly seat 700 is used for mounting on the frame 800, and the assembly seat 700 is provided with a mounting hole 701. The middle shaft 100 is rotatably mounted in the mounting hole 701. A clearance cavity 702 is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the middle shaft 100. The shaft sleeve 200 extends into the clearance cavity 702.

[0094] The assembly seat 700 can be detachably arranged on the frame 800. For example, the assembly seat 700 can be clamped on the frame 800 or mounted on the frame 800 by fasteners. The assembly seat 700 is provided with a mounting hole 701 extending in the horizontal direction. The two ends of the mounting hole 701 can be provided through. The middle shaft 100 can be arranged in the mounting hole 701 through a bearing system, so that the middle shaft 100 can rotate. The outer diameter of the middle shaft 100 can be smaller than the hole diameter of the mounting hole 701 near the pedal 300, so that a clearance cavity 702 is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the middle shaft 100. When the shaft sleeve 200 moves in the axial direction of the middle shaft 100 to any position, part of the structure of the shaft sleeve 200 extends into the clearance cavity 702. When the shaft sleeve 200 moves in the direction close to the assembly seat 700 to a part of the position, part of the structure of the shaft sleeve 200 extends into the clearance cavity 702. When the shaft sleeve 200 moves in the direction away from the assembly seat 700 to a part of the position, the shaft sleeve 200 is located outside one end of the assembly seat 700 as a whole. The specific length of the shaft sleeve 200 can be flexibly adjusted according to actual needs, which will not be described here.

[0095] In the embodiment, the entire electric toothed disc device can be arranged as an assembly structure, and the entire electric toothed disc device can be quickly installed and replaced through the assembly seat 700, thereby providing better use experience for the user. In addition, compared with the shaft sleeve 200 moving back and forth at one end of the assembly seat 700, in the application, the hole wall of the mounting hole 701 and the outer peripheral wall of the central shaft 100 form a space-allowing cavity 702, the shaft sleeve 200 can extend into the space-allowing cavity 702, thereby not only making the moving path of the shaft sleeve 200 longer, thereby making the adjustment range of the toothed disc 300 along the axial direction of the central shaft 100 larger, but also making the shaft sleeve 200 extend along the axial direction of the central shaft 100 longer, thereby making the structural strength of the shaft sleeve 200 higher, and the installation stability of the shaft sleeve 200 better, thereby reducing the shaking of the toothed disc 300, and further improving the riding experience.

[0096] It can be understood that if the shaft sleeve 200 moves back and forth at one end of the assembly seat 700, not only the moving path of the shaft sleeve 200 is shorter, but also since the distance between the end of the central shaft 100 and the assembly seat 700 is certain, in order to make the shaft sleeve 200 move along the axial direction of the central shaft 100 by a certain displacement, the length of the shaft sleeve 200 can only be set shorter, thereby not only the structural strength is low, but also the stability is poor, the toothed disc 300 is easy to shake, and the riding experience is affected, and in the application, the space-allowing cavity 702 for the shaft sleeve 200 to extend into is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the central shaft 100, thereby effectively solving the above problems.

[0097] In some embodiments, as shown in Figure 3 the toothed disc 300 can be installed at the end of the shaft sleeve 200 away from the assembly seat 700, and when the shaft sleeve 200 moves along the axial direction of the central shaft 100 to any position, the end of the shaft sleeve 200 away from the toothed disc 300 is located in the space-allowing cavity 702.

[0098] In the embodiment, the arrangement makes the shaft sleeve 200 extend along the axial direction of the central shaft 100 longer, thereby making the structural strength of the shaft sleeve 200 higher, and the installation stability of the shaft sleeve 200 better, thereby reducing the shaking of the toothed disc 300, and further improving the riding experience, and in addition, the interference between the shaft sleeve 200 and the assembly seat 700 when the shaft sleeve 200 enters the space-allowing cavity 702 can be avoided, thereby making the movement of the shaft sleeve 200 more smooth.

[0099] In some embodiments, the electric toothed disc device further comprises:

[0100] the first bearing 500 is installed at the end of the mounting hole 701 away from the toothed disc 300;

[0101] the second bearing 600 is installed at the end of the mounting hole 701 close to the toothed disc 300;

[0102] The middle shaft 100 is rotatably installed in the first bearing 500 and the second bearing 600.

[0103] In the embodiment, the rotation of the middle shaft 100 is achieved by the first bearing 500 and the second bearing 600, the rotation requirement of the middle shaft 100 is met, and the rotation of the middle shaft 100 is smoother.

[0104] In some embodiments, as shown in FIG. 1, a limiting protrusion 103 is arranged on the outer circumferential wall of the middle shaft 100 and on the side of the first bearing 500 close to the shaft sleeve 200 to provide a limitation in one direction. Meanwhile, an axial locking structure 501 is arranged on the outer circumferential wall of the middle shaft 100 and on the side of the first bearing 500 away from the shaft sleeve 200 to achieve the limitation of the first bearing 500 in the other direction, and the limitation of the movement of the middle shaft 100 in the axial direction is also achieved. Figure 3 In some embodiments, as shown in FIG. 1, a first locking screw plug 502 is arranged on the assembly seat 700 or the frame 800 on the side of the first bearing 500 away from the shaft sleeve 200. The first locking screw plug 502 is located on the outer circumferential side of the axial locking structure 501 to achieve the fixation of the first bearing 500. A second locking screw plug 601 can be arranged on the assembly seat 700 or the frame 800 on the side of the second bearing 600 away from the first bearing 500. The second locking screw plug 601 can be located on the outer side of the shaft sleeve 200 to achieve the fixation of the second bearing 600.

[0105] Figure 3 It should be noted that when there is a gap between the first locking screw plug 502 and the axial locking structure 501, a first sealing ring 503 can be arranged between the first locking screw plug 502 and the axial locking structure 501. When there is a gap between the second locking screw plug 601 and the shaft sleeve 200, a second sealing ring 602 can be arranged between the second locking screw plug 601 and the shaft sleeve 200.

[0106] In some embodiments, the first bearing 500 can be a ball bearing.

[0107] In the embodiment, the ball bearing has a strong axial bearing capacity, which can better bear the axial force when the tooth disc 300 moves, and the middle shaft 100 can be better fixed by the ball bearing.

[0108] In the embodiment, the ball bearing has a strong axial bearing capacity, which can better bear the axial force when the tooth disc 300 moves, and the middle shaft 100 can be better fixed by the ball bearing.

[0109] ​It should be noted that the first bearing 500 can also be other suitable types of bearings, which will not be described here.

[0110] In some embodiments, the second bearing 600 is arranged as a needle bearing and is sleeved on the outer side of the shaft sleeve 200, and the shaft sleeve 200 can move relative to the second bearing 600 in the axial direction of the central shaft 100.

[0111] The second bearing 600 described above can be a needle bearing without an inner ring, and the end of the shaft sleeve 200 away from the tooth disc 300 can extend into the second bearing 600 as an inner ring of the second bearing 600.

[0112] In the present embodiment, the shaft sleeve 200 extends into the second bearing 600 and can rotate relative to the second bearing 600, thereby reducing the circumferential friction on the outer peripheral wall of the shaft sleeve 200, making the rotation of the shaft sleeve 200 more smooth, thereby improving the riding efficiency. In addition, since the second bearing 600 is arranged as a needle bearing, the shaft sleeve 200 can move relative to the second bearing 600 in the axial direction of the central shaft 100, thereby reducing the axial friction on the outer peripheral wall of the shaft sleeve 200, making the shaft sleeve 200 move in the axial direction of the central shaft 100 more smoothly, and the shifting of the tooth disc 300 more smoothly. In addition, the shaft sleeve 200 can also support the second bearing 600, making the installation of the second bearing 600 more stable.

[0113] It should be noted that the second bearing 600 can also be other suitable types of bearings, which will not be described here.

[0114] In some embodiments, the central shaft 100 is provided with a mounting cavity 101, and the telescopic mechanism 400 is mounted in the mounting cavity 101. The outer peripheral wall of the central shaft 100 is provided with a displacement slot 102 communicating with the mounting cavity 101. The telescopic mechanism 400 is provided with a connecting piece 401, which is arranged in the displacement slot 102 and connected to the shaft sleeve 200 and / or the tooth disc 300.

[0115] The mounting cavity 101 described above can extend in the axial direction of the central shaft 100. Taking a hydraulic cylinder as an example of the telescopic mechanism 400, the mounting cavity 101 can be divided into two parts, including a first cavity and a second cavity. The first cavity can be arranged away from the tooth disc 300, and the second cavity can be arranged close to the tooth disc 300. The first cavity can be used to mount the cylinder body part of the hydraulic cylinder, and the second cavity can be used to accommodate the piston rod of the hydraulic cylinder and the connecting piece 401, etc.

[0116] The outer peripheral wall of the middle shaft 100 is provided with a clearance slot 102 on the side close to the shaft sleeve 200. The clearance slot 102 is connected with the mounting cavity 101. The clearance slot 102 can be provided in a strip shape, and the length direction is consistent with the axial direction of the middle shaft 100, so as to connect the connecting member 401 with the shaft sleeve 200 and / or the toothed disc 300, and guide the connecting member 401 to slide along the axial direction of the middle shaft 100. At the same time, the clearance slot 102 can effectively prevent the relative rotation between the shaft sleeve 200 and the middle shaft 100.

[0117] The clearance slot 102 can be provided in multiple on the side of the outer peripheral wall of the middle shaft 100 close to the shaft sleeve 200. The multiple clearance slots 102 can increase the connection stability between the connecting member 401 and the shaft sleeve 200 and / or the toothed disc 300. Figure 3 As shown in the figure, the middle shaft 100 is provided with two clearance slots 102. The upper part and the lower part of the inner wall of the shaft sleeve 200 are connected with the connecting member 401 through the clearance slots 102.

[0118] In the embodiment, the mounting cavity 101 is provided. The telescopic mechanism 400 can be protected, and the telescopic mechanism 400 is closer to the axial center of the middle shaft 100, so that the centrifugal force is smaller, the rotation of the middle shaft 100 is less hindered, the rotation of the middle shaft 100 is smoother, and the riding efficiency of the bicycle user is further improved.

[0119] In some embodiments, referring to Figure 2 、 Figure 3 The telescopic mechanism 400 is provided as a hydraulic cylinder or a pneumatic cylinder. The electric toothed disc device further comprises:

[0120] A first medium conveying pipe 900 is connected with the telescopic mechanism 400.

[0121] A second medium conveying pipe 901 is rotationally connected with the first medium conveying pipe 900. The second medium conveying pipe 901 is used to connect an electric control driving unit 902.

[0122] The telescopic mechanism 400 is a hydraulic cylinder or a pneumatic cylinder, which has simple structure, convenient installation, and good telescopic effect.

[0123] Taking the telescopic mechanism 400 as an oil cylinder in the hydraulic cylinder as an example, the electric control driving unit 902 composed of an oil pump, an oil conveying pipe, an oil tank, an electromagnetic valve and the like can be further provided on the frame 800. The oil pump is arranged between the oil tank and the oil cylinder through the oil conveying pipe. The oil pump can control the sliding of the piston rod by injecting or extracting oil into or from the rodless cavity of the oil cylinder and injecting or extracting oil into or from the rod cavity of the oil cylinder, so as to realize telescopic effect.

[0124] The electric control driving unit 902 can be mounted on the frame 800 or the assembly seat 700. When the telescopic mechanism 400 is a hydraulic cylinder, the electric control driving unit 902 can include a hydraulic pump, and a liquid storage tank or the like can also be arranged on the frame 800 or the assembly seat 700. When the telescopic mechanism 400 is a pneumatic cylinder, the electric control driving unit 902 can be a gas pump. The telescopic mechanism 400 has a rodless cavity and a rod cavity. The first medium conveying pipe 900 can be two and respectively communicate with the rodless cavity and the rod cavity. The second medium conveying pipe 901 can be two and both are located outside the central shaft 100. The two second medium conveying pipes 901 are respectively rotationally connected with the two first medium conveying pipes 900. The ends of the two second medium conveying pipes 901 away from the first medium conveying pipes 900 are connected to the electric control driving unit 902.

[0125] In the embodiment, the electric control driving unit 902 injects or extracts the driving medium such as oil into or from the rodless cavity of the telescopic mechanism 400 and injects or extracts the driving medium such as oil into or from the rod cavity of the telescopic mechanism 400 through the first medium conveying pipe 900 and the second medium conveying pipe 901, so as to control the sliding of the piston rod and further realize the telescoping of the telescopic mechanism 400. The structure is simple and the operation is convenient. In addition, the second medium conveying pipe 901 is rotationally connected with the first medium conveying pipe 900, so that when the first medium conveying pipe 900 rotates with the central shaft 100, interference between the second medium conveying pipe 901 and the first medium conveying pipe 900 can be avoided, and the connectivity between the second medium conveying pipe 901 and the first medium conveying pipe 900 is better.

[0126] In some embodiments, with reference to Figure 2 、 Figure 3 , the electric toothbrush device further comprises:

[0127] The assembly seat 700 is arranged on the frame 800. The assembly seat 700 is provided with a mounting hole 701. The central shaft 100 is rotationally arranged in the mounting hole 701. The first medium conveying pipe 900 is arranged in the central shaft 100. The second medium conveying pipe 901 is arranged in the assembly seat 700. The outer side of the central shaft 100 is sleeved with a rotary joint 903. The first medium conveying pipe 900 is connected to the second medium conveying pipe 901 through the rotary joint 903.

[0128] The first medium conveying pipe 900 can be arranged in the central shaft 100. The second medium conveying pipe 901 can be arranged in the assembly seat 700. The rotary joint 903 can be annular. The rotary joint 903 can include an inner sleeve and an outer sleeve. The inner sleeve and the outer sleeve can rotate relative to each other. An annular channel is formed between the inner sleeve and the outer sleeve. The inner sleeve can be fixedly connected to the central shaft 100 and connected to the first medium conveying pipe 900. The outer sleeve can be fixedly connected to the assembly seat 700 and connected to the second medium conveying pipe 901. The first medium conveying pipe 900 and the second medium conveying pipe 901 both communicate with the annular channel.

[0129] In this embodiment, the communication between the first medium conveying pipe 900 and the second medium conveying pipe 901 is realized through the annular channel of the rotary joint 903, and the inner sleeve and the outer sleeve of the rotary joint 903 can rotate relative to each other, thereby realizing the rotary connection between the second medium conveying pipe 901 and the first medium conveying pipe 900. The structure is simple, the sealing performance is good, and the second medium conveying pipe 901 can be in communication with the first medium conveying pipe 900 when the middle shaft 100 rotates to any angle, and the practicability is better.

[0130] It should be noted that in some embodiments, the second medium conveying pipe 901 and the first medium conveying pipe 900 can also be rotatably connected through other ways. For example, an annular groove can be arranged on the outer circumferential wall of the middle shaft 100, the annular groove surrounds the middle shaft 100 in the circumferential direction of the middle shaft 100, the hole wall of the mounting hole 701 of the assembly seat 700 covers the annular groove to form an annular channel, and the first medium conveying pipe 900 and the second medium conveying pipe 901 are in communication with the annular channel, thereby realizing the rotary connection between the second medium conveying pipe 901 and the first medium conveying pipe 900. In addition, the hole wall of the mounting hole 701 of the assembly seat 700 can also be provided with an annular groove, the annular groove surrounds the middle shaft 100 in the circumferential direction of the middle shaft 100, the outer circumferential wall of the middle shaft 100 covers the annular groove to form an annular channel, and the first medium conveying pipe 900 and the second medium conveying pipe 901 are in communication with the annular channel, thereby realizing the rotary connection between the second medium conveying pipe 901 and the first medium conveying pipe 900. In addition, the outer circumferential wall of the middle shaft 100 and the hole wall of the mounting hole 701 of the assembly seat 700 can also be provided with annular grooves, the two annular grooves are butted to form an annular channel, and the first medium conveying pipe 900 and the second medium conveying pipe 901 are in communication with the annular channel, thereby realizing the rotary connection between the second medium conveying pipe 901 and the first medium conveying pipe 900.

[0131] It can be understood that the first medium conveying pipe 900 can be directly arranged on the middle shaft 100, and the second medium conveying pipe 901 can be directly arranged on the assembly seat 700, or a first medium conveying channel can be arranged on the middle shaft 100, the first medium conveying channel serving as part of the structure of the first medium conveying pipe 900, and a second medium conveying channel can be arranged on the assembly seat 700, the second medium conveying channel serving as part of the structure of the second medium conveying pipe 901.

[0132] The application also provides a bicycle comprising the adaptive gear shifting system as described above. The bicycle has the adaptive gear shifting system, thereby having all the beneficial effects brought by the adaptive gear shifting system.

[0133] The above merely illustrates the specific embodiments of the present application, and those skilled in the art can clearly understand that the protection scope of the present application is not limited to this, and any modification or replacement within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. An adaptive transmission system, characterized by, The adaptive variable speed system comprises: a torque detection unit for detecting the output torque of human body pedaling; a pedaling frequency detection unit for detecting the pedaling frequency of human body pedaling cranks; a main controller electrically connected with the torque detection unit and the pedaling frequency detection unit respectively; a flywheel variable speed device electrically connected with the main controller for adjusting the gear position of a flywheel; an electric toothed disc device comprising a middle shaft, a shaft sleeve, an extension mechanism, and an electric control driving unit; the middle shaft is used for rotating installation on a frame; the shaft sleeve is sleeved on the middle shaft and can move along the axial direction of the middle shaft, the shaft sleeve and the middle shaft are relatively fixed in the circumferential direction of the middle shaft, the shaft sleeve is provided with a toothed disc; the extension mechanism is arranged in the middle shaft and connected to the shaft sleeve and / or the toothed disc; the electric control driving unit is arranged on the frame and used for driving the extension mechanism to operate, so that the extension mechanism drives the shaft sleeve to move along the axial direction of the middle shaft through extension and retraction, the shaft sleeve can rotate relative to the extension mechanism, and the electric control driving unit is electrically connected with the main controller.

2. The adaptive shifting system of claim 1, wherein, The adaptive variable speed system further comprises: a man-machine interaction unit in communication connection with the main controller.

3. The adaptive shifting system of claim 1, wherein, The adaptive variable speed system further comprises: a lactic acid detection device in communication connection with the main controller and used for detecting the lactic acid of human body; and / or a heart rate detection device in communication connection with the main controller and used for detecting the heart rate of human body; and / or a blood pressure detection device in communication connection with the main controller and used for detecting the blood pressure of human body.

4. The adaptive shifting system of claim 1, wherein, The electric toothed disc device further comprises: a position detection unit electrically connected with the main controller and used for acquiring the position of the toothed disc on the middle shaft.

5. The adaptive shifting system of claim 1, wherein, The electric toothed disc device further comprises: an assembly seat used for installation on the frame, the assembly seat is provided with an installation hole, the middle shaft is rotatably installed in the installation hole, and a clearance cavity is formed between the hole wall of the installation hole and the outer peripheral wall of the middle shaft, and the clearance cavity is used for the shaft sleeve to extend into.

6. The adaptive shifting system of claim 5, wherein, The electric toothed disc device further comprises: a first bearing installed at one end of the installation hole away from the toothed disc; a second bearing installed at one end of the installation hole close to the toothed disc; the middle shaft is rotatably installed in the first bearing and the second bearing.

7. The adaptive shifting system of claim 1, wherein, The middle shaft is provided with an installation cavity, the extension mechanism is installed in the installation cavity, the outer peripheral wall of the middle shaft is provided with a clearance slot communicating with the installation cavity, the extension mechanism is provided with a connecting piece, and the connecting piece is arranged in the clearance slot and connected to the shaft sleeve and / or the toothed disc.

8. The adaptive shifting system of claim 1, wherein, The extension mechanism is arranged as a hydraulic cylinder or a pneumatic cylinder, and the electric toothed disc device further comprises: a first medium conveying pipe connected to the extension mechanism; a second medium conveying pipe in rotational connection with the first medium conveying pipe, and the second medium conveying pipe is used for connecting the electric control driving unit.

9. The adaptive shifting system of claim 8, wherein, The electric toothed disc device further comprises: an assembly seat used for installation on the frame, the assembly seat is provided with an installation hole, the middle shaft is rotatably installed in the installation hole, the first medium conveying pipe is arranged in the middle shaft, the second medium conveying pipe is arranged in the assembly seat, the outer side of the middle shaft is sleeved with a rotary joint, and the first medium conveying pipe is connected to the second medium conveying pipe through the rotary joint.

10. A bicycle characterized in that, An adaptive transmission system comprising any one of the features of claims 1 to 9. An adaptive transmission system comprising any one of the features of claims 1 to 9.

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