External intelligent speed control system and bicycle

Abstract

According to the external intelligent speed change system and the bicycle, the riding state of a rider can be determined by arranging a plurality of state detection units, a main controller is connected to a flywheel speed change device so that the main controller can have the capacity of controlling the flywheel speed change device to shift gears, and therefore the riding state of the rider can be determined. The self-adaptive adjustment of the gear of the flywheel is achieved in the riding process of a rider, meanwhile, the movable shaft sleeve is arranged on the middle shaft, the crankset is arranged on the shaft sleeve, then an external telescopic mechanism can be controlled by the electric control driving unit to drive the shaft sleeve to move along the middle shaft, the crankset can move along the middle shaft, and therefore the gear of the flywheel can be adjusted in a self-adaptive mode. Therefore, the included angle between the chain and the chain wheel is effectively reduced, and the riding efficiency of a bicycle user is improved.

Description

TECHNICAL FIELD

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

[0002] Nowadays, the gear shifting of a variable speed bicycle needs to be completed manually. During riding, whether encountering ups and downs in slope or planning to adjust the riding speed, the rider has to rely on his own experience to determine the gear shifting time, which undoubtedly puts a high standard on the rider's experience accumulation. Novices often have difficulty in accurately grasping it. Once the gear shifting operation is improper, significant jerk will occur in the riding process, which not only intensifies the physical exertion of the rider and reduces the riding efficiency, but also makes the sprocket and chain prone to have a too large included angle in most gear positions during gear shifting, further reducing the riding efficiency and making the overall riding experience worse. CONTENT OF THE UTILITY MODEL

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

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

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

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

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

[0008] an electrically controlled sprocket structure, which comprises a shaft sleeve, an extension mechanism and an electrically controlled driving unit; the shaft sleeve is sleeved on a 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 shaft sleeve is arranged on a sprocket; the middle shaft is used to rotate and install on a frame; the extension mechanism is located on the outer side of the middle shaft and is connected to the shaft sleeve and / or the sprocket; the electrically controlled driving unit is arranged on the frame and is used 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 contraction; the shaft sleeve can rotate relative to the extension mechanism, and the electrically controlled driving unit is electrically connected with the main controller.

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

[0010] The external intelligent variable speed system and the bicycle of the embodiment of the present application can determine the riding state of the rider by setting multiple state detection units, can make the main controller have the ability to control the gear shifting of the freewheel variable speed device by connecting the main controller to the freewheel variable speed device, so as to realize the adaptive adjustment of the freewheel gear position during the rider's riding process. At the same time, by setting a movable shaft sleeve on the middle shaft and setting a tooth disc on the shaft sleeve, the tooth disc can be moved along the middle shaft by controlling the movable shaft sleeve to move along the middle shaft by the external telescopic mechanism driven by the electric control driving unit, so that the included angle between the chain and the tooth disc can be effectively reduced, thereby improving the riding efficiency of the bicycle user.

[0011] 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

[0012] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0013] Figure 1 An electrical system diagram of the external intelligent variable speed system provided by the embodiment of the present application is provided;

[0014] Figure 2 A schematic diagram of the overall structure of the electric tooth disc structure provided by the embodiment of the present application is provided;

[0015] Figure 3 A partial sectional view of the electric tooth disc structure provided by the embodiment of the present application is provided.

[0016] REFERENCE NUMERALS:

[0017] Middle shaft 100; limiting protrusion 101;

[0018] Shaft sleeve 200;

[0019] Tooth disc 300;

[0020] Telescopic mechanism 400;

[0021] First bearing 500; axial locking structure 501; first locking plug 502; first sealing ring 503;

[0022] Second bearing 600; second locking plug 601; second sealing ring 602;

[0023] Assembly seat 700; mounting hole 701; accommodation cavity 702;

[0024] Frame 800;

[0025] Third bearing 900;

[0026] Crank connecting shaft 1000;

[0027] Flywheel 1100;

[0028] 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; electronically controlled drive unit 1210. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] See Figure 1 As shown, one embodiment of this application provides an external intelligent transmission system, which includes:

[0035] Multiple status detection units, each of which is used to collect at least one of the bicycle operating parameters and / or at least one of the human functional parameters;

[0036] The main controller 1201 is electrically connected with the plurality of state detection units respectively.

[0037] The freewheel gear device is connected with the main controller 1201 and is used for adjusting the gear position of the freewheel 1100.

[0038] The electric control tooth disc structure comprises a shaft sleeve 200, an extension mechanism 400 and an electric control driving unit 1210. 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 and is arranged on the tooth disc 300. The middle shaft 100 is used for rotatingly installing the tooth disc 300 on the frame 800. The extension mechanism 400 is located outside the middle shaft 100 and is connected with the shaft sleeve 200 and / or the tooth disc 300. The electric control driving unit 1210 is arranged on the frame 800 and is used for driving 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 1210 is electrically connected with the main controller 1201.

[0039] In the embodiment, the plurality of state detection units are arranged to determine the riding state of the rider. The main controller 1201 is connected with the freewheel gear device, so that the main controller 1201 has the ability to control the gear shifting of the freewheel gear device, to realize the self-adaptive adjustment of the gear position of the freewheel 1100 during the rider's riding. Meanwhile, the movable shaft sleeve 200 is arranged on the middle shaft 100, and the tooth disc 300 is arranged on the shaft sleeve 200. Then, the electric control driving unit 1210 is used to control the external extension mechanism 400 to drive the shaft sleeve 200 to move along the middle shaft 100, so that the tooth disc 300 can move along the middle shaft 100, to effectively reduce the included angle between the chain and the tooth disc 300, thereby improving the riding efficiency of the bicycle user.

[0040] The bicycle operating parameters can include the parameters that can be directly detected on the bicycle, such as the driving speed, the wheel speed, the pedaling frequency, the torque and the like. The specific number of the parameters needs to be flexibly selected according to the actual demand. In many common scenarios, the pedaling frequency and the torque can meet the demand.

[0041] The human function parameters can include the parameters that need to be detected on the rider, such as the blood pressure, the lactic acid, the heart rate, the blood oxygen content and the like. The specific number of the parameters needs to be flexibly selected according to the actual demand. In many common scenarios, the lactic acid and the heart rate can meet the demand.

[0042] The main controller 1201 can directly obtain the bicycle operating parameters and / or human function parameters collected by the plurality of state detection units after being electrically connected to the plurality of state detection units. The types and quantities of the collected parameters need to be determined according to the types of the sensors corresponding to the plurality of state detection units and the speed of each type.

[0043] The main controller 1201 can control the freewheel gear shifting device to adjust the gear position of the freewheel 1100 after being electrically connected to the freewheel gear shifting device of the bicycle.

[0044] The freewheel gear shifting device can directly use a mature electric freewheel gear shifting mechanism on the market for controlling the gear shifting of the freewheel 1100, or can use other forms of freewheel gear shifting mechanisms that can be controlled by the main controller 1201. For example, a 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 bicycle operating parameters and the human function parameters can reflect the physical state of the rider to a certain extent. For example, the torque can reflect the force state of the rider during riding. Generally, the greater the force, the greater the torque. The pedaling frequency can directly reflect the speed of the rider pedaling the pedal. Generally, the faster the speed, the more tiring it is. Lactic acid can directly reflect the current anaerobic exercise situation or fatigue state of the rider. Generally, the higher the lactic acid, the more prominent the anaerobic exercise situation or the more fatigue. Heart rate can directly reflect the load state of the rider. Generally, the higher the heart rate, the greater the current load on the rider. Based on the foregoing principles, the current riding state of the rider can be effectively determined by comprehensively analyzing the bicycle operating parameters and the human function parameters, and then the freewheel 1100 can be controlled to shift up when the rider is in a state of exertion, and to shift down when the rider is too relaxed. However, there are many ways to determine the riding state of the rider by using the bicycle operating parameters and the human function parameters. Generally, multiplication, weighted operation, etc. can be directly used. Some fixed calculation models can also be used. For example, the product of lactic acid and heart rate 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 gear can be shifted up when the product is greater than the pre-set threshold or threshold range, and the gear can be shifted down when the product is less than the pre-set threshold or threshold range. Of course, a weight factor can be further introduced to perform weighted operation on lactic acid and heart rate, so that a better calculation value (the product can be understood as the calculation value) for determining the pre-set threshold or threshold range can be obtained in some scenarios. Then, the calculation value and the pre-set threshold or threshold range can be used to determine the riding state of the rider. There are many ways to determine the riding state of the rider. The user can choose the appropriate way according to the actual needs.

[0046] The above-mentioned middle shaft 100 can be mounted on the frame 800 through the assembly seat 700. Specifically, the assembly seat 700 can be mounted with a bearing system, and the middle shaft 100 is mounted 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 a crank connecting shaft 1000 for connecting a crank, and the crank is used to mount a pedal, and a bicycle user rotates the crank through the pedal, thereby driving the middle shaft 100 to rotate.

[0047] The above-mentioned shaft sleeve 200 is sleeved outside the middle shaft 100 and can move 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.

[0048] In addition, the length of the shaft sleeve 200 can be flexibly adjusted according to actual needs. For example, as shown in Figure 3 , when the designed 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 designed 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, and in the case that the driving demand of the tooth disc 300 is small, the shaft sleeve 200 with a shorter length can be considered.

[0049] The above-mentioned telescopic mechanism 400 is located outside the middle shaft 100, for example, can be mounted on the assembly seat 700, or can be directly mounted on the frame 800. The telescopic mechanism 400 can be connected to the shaft sleeve 200, or can be connected to the tooth disc 300, or can be 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 can be slightly deviated from the axial direction of the middle shaft 100. The telescopic mechanism 400 can drive the shaft sleeve 200 to move through its own telescopic function, thereby adjusting the relative position of the tooth disc 300 and the middle shaft 100, and thereby adjusting the relative position between the tooth disc 300 and the freewheel 1100, so as to adjust the included angle between the chain and the tooth disc 300. It should be noted that the shaft sleeve 200 can rotate relative to the telescopic mechanism 400 in the circumferential direction of the shaft sleeve 200.

[0050] The above-mentioned electric control driving unit 1210 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 between the tooth disc 300 and the freewheel 1100, and thereby adjust the included angle between the chain and the tooth disc 300.

[0051] The above-mentioned electric control driving unit 1210 is controlled by the main controller 1201, that is, the electric control driving unit 1210 can be operated by the main controller 1201.

[0052] Specifically, the electric control driving unit 1210 also has differences in settings according to different types of telescopic mechanisms 400. For example, in the case of a hydraulic cylinder, the electric control driving unit 1210 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. In the case of a pneumatic cylinder, the electric control driving unit 1210 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. In the case of an electric push rod, the electric control driving unit 1210 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 participate in power supply, 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.

[0053] The above-mentioned main controller 1201 can 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, in the case of no position detection function, the power-on time of the electric control driving unit 1210 can be directly controlled to complete the tooth disc position adjustment. 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 (such as the leftmost end or the rightmost end) after each use of the bicycle, so as to avoid cumulative errors.

[0054] The driving mechanism composed of the above-mentioned electric control driving unit 1210 and the telescopic mechanism 400 is a mechanism that is actively adjusted, and therefore, the movement of the shaft sleeve 200 can be limited, that is, the shaft sleeve 200 will not passively move due to the traction of the chain, thereby improving the stability of riding.

[0055] In some embodiments, the plurality of state detection units at least include:

[0056] The lactic acid detection device 1207 is in communication connection with the main controller 1201, and is used for detecting the lactic acid of the human body; and / or,

[0057] The heart rate detection device 1208 is in communication connection with the main controller 1201, and is used for detecting the heart rate of the human body; and / or,

[0058] The blood pressure detection device 1209 is in communication connection with the main controller 1201, and is used for detecting the blood pressure of the human body.

[0059] In this embodiment, considering that the states of lactic acid, heart rate and blood pressure can effectively reflect the function 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 realize detection of the lactic acid, heart rate and blood pressure of the rider, so that when the lactic acid, heart rate and blood pressure are high, the gear can be lowered in time to avoid injury to the rider, and when it is judged that the state of the rider is good, the gear can be raised, and the like.

[0060] 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.

[0061] In addition, it should be noted that the aforementioned process of determining the physical state or function state of the rider by using lactic acid and heart rate can be understood as that when the blood pressure parameter is added, the lactic acid and heart rate obtained in the foregoing can be comprehensively considered, for example, the product of the three can be used to control the gear, and the control mode can refer to the aforementioned control mode of lactic acid and heart rate. It can also be understood that any two parameters of lactic acid, heart rate and blood pressure can be directly used to control the gear according to the control process of lactic acid and heart rate.

[0062] The aforementioned lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can all directly use mature products on the market.

[0063] 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.

[0064] In some embodiments, the lactic acid detection device 1207, the heart rate detection device 1208 and the blood pressure detection device 1209 can be arranged in multiple numbers, so that multiple collected values can be obtained for mean value calculation, thereby avoiding errors caused by a single sensor sampling.

[0065] In some embodiments, the plurality of state detection units include:

[0066] The moment detection unit 1204 is in communication connection with the main controller 1201 and is configured to detect the output moment of the human body pedaling; and / or,

[0067] The pedaling frequency detection unit 1205 is in communication connection with the main controller 1201 and is configured to detect the pedaling frequency of the human body pedaling the crank.

[0068] The torque detection unit 1204 can be a torque sensor, a stress sensor, etc., and can be installed on the crank, the middle shaft 100, etc., to detect the torque generated by the rider pedaling the crank.

[0069] The pedaling frequency detection unit 1205 can be a pressure sensor, an angular velocity sensor, a photoelectric sensor, a contact sensor, etc., and can detect the pedaling frequency of the rider by directly detecting the rotation frequency of the crank, the pedal 300, etc.

[0070] In this embodiment, the torque detection unit 1204 and the pedaling frequency detection unit 1205 are introduced to enrich the ways of detecting the riding state of the rider and better adapt to the needs of different scenarios, considering that the output torque and the pedaling frequency can also reflect the riding state.

[0071] It should be noted that the output torque and the pedaling frequency are also the detection results of the state detection unit, and therefore, when the output torque and the pedaling frequency are needed, they can also be comprehensively considered together with the previously obtained lactic acid and heart rate, for example, the product of three or four of them, or a calculation value obtained by weighted calculation of three or four of them can be used for gear control, and the specific control mode can refer to the control mode of the previously described lactic acid and heart rate. It can also be understood that any two parameters selected from the output torque, the pedaling frequency, the lactic acid, the heart rate, and the blood pressure can be directly controlled by referring to the control gear shifting process of the lactic acid and the heart rate.

[0072] In some embodiments, the torque detection unit 1204 is arranged on the crank and / or the pedal 300 and / or the middle shaft 100; and / or,

[0073] The pedaling frequency detection unit 1205 is arranged on the crank and / or the pedal 300 and / or the middle shaft 100.

[0074] The torque detection unit 1204 can be arranged on the crank, the pedal 300, or the middle shaft 100, and theoretically, it can detect the torque. Although the values directly detected at different positions can be different, they can be preprocessed by simple mathematical operations to obtain the output torque generated by the rider pedaling the pedal.

[0075] The torque detection unit 1204 can include multiple torque sensors, in which case, torque sensors can be arranged at multiple positions of the crank, the pedal 300, and the middle shaft 100. Subsequently, after normalization, mean value calculation can be performed to obtain the most accurate torque and eliminate errors caused by a single sensor.

[0076] The torque detection unit 1204 can be arranged on the crank, the chainring 300, or the middle shaft 100, and theoretically, torque detection can be achieved. Although the values obtained by direct detection are different when arranged at different positions, the values can be obtained by simple preprocessing to represent the torque formed by the rider pedaling the pedal.

[0077] The above-mentioned pedal frequency detection unit 1205 can include a plurality of pedal frequency sensors. In this case, torque sensors can be arranged at multiple positions in the crank, the chainring 300, and the middle shaft 100. Subsequently, mean value calculation can be performed after normalization processing to obtain the pedal frequency closest to the true pedal frequency and eliminate errors caused by a single sensor.

[0078] In some embodiments, the external intelligent variable speed system further comprises:

[0079] The human-computer interaction unit 1206 is in communication connection with the main controller 1201.

[0080] 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 added to adjust the pre-set threshold or threshold range, so as to better meet the use requirements of different riders.

[0081] It should be noted that in the case of having other intelligent terminals, the rider can also transmit the instruction for modifying the pre-set threshold or threshold range to the main controller 1201 through the other intelligent terminals to complete the adjustment of the pre-set threshold or threshold range.

[0082] In some embodiments, the electrically controlled chainring structure further comprises:

[0083] The position detection unit 1202 is in electrical connection with the main controller 1201 and is used to obtain the position of the chainring 300 on the middle shaft 100.

[0084] In the present embodiment, the position detection unit 1202 can be arranged to directly determine the current position of the chainring 300, and the main controller 1201 can be adapted to adjust the position of the chainring 300 according to the current gear information of the freewheel 1100. Generally, the chainring 300 will correspond to the tooth disc corresponding to the current gear of the freewheel 1100 as much as possible to reduce the inclination angle of the chain.

[0085] The position detection unit 1202 can be arranged 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 central shaft 100 can be determined by simple addition and subtraction operation. Alternatively, an ultrasonic sensor or other non-contact sensor can be used for detection. 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 not limited in the embodiment.

[0086] In some embodiments, the position detection unit 1202 includes a displacement sensor electrically connected to the main controller 1201, and the displacement sensor is used to detect the extension distance of the extension end of the telescopic mechanism 400.

[0087] In the 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 screw rod of the electric push rod. This can effectively reduce the interference of external factors on detection, improve the accuracy of detection, and effectively reduce the damage of external impact to the position detection unit 1202.

[0088] In some embodiments, the electric toothed disc structure further includes:

[0089] The power storage unit is used to provide power for the electric drive unit 1210 and the main controller 1201.

[0090] In the embodiment, the power storage unit is directly used as a power source, for example, a lithium battery or other storage battery. This can effectively improve the user experience, and the user does not need to use an external mobile power supply for power supply.

[0091] In some embodiments, the electric drive unit 1210 and the main controller 1201 can be powered by a mobile power supply.

[0092] In some embodiments, the electric toothed disc structure further includes:

[0093] The wireless communication module 1203 is electrically connected to the main controller 1201.

[0094] The wireless communication module 1203 can realize wireless communication with the outside world. For example, the current relative position of the toothed disc 300 can be transmitted to the outside world through the wireless communication module 1203 by wireless communication. In addition, the operation data collected by the main controller 1201 on the remaining bicycles can be uploaded to the cloud for storage and record, so as to provide more in-depth services for users in the future.

[0095] The wireless communication module 1203 can be a Bluetooth module, a WIFI module, etc. The specific type can be selected according to actual needs.

[0096] In some embodiments, the telescopic mechanism 400 is provided in multiple numbers and arranged uniformly in the circumferential direction of the shaft sleeve 200; and / or,

[0097] The telescopic mechanism 400 is at least one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0098] Taking the telescopic mechanism 400 as an oil cylinder in a hydraulic cylinder as an example, the cylinder body of the oil cylinder can be mounted on the assembly seat 700 or the frame 800, the piston rod of the oil cylinder can be connected to the shaft sleeve 200 and / or the toothed disc 300, and the frame 800 can further be provided with an electric control driving unit 1210, which can include an oil pump, an oil delivery pipe, an oil tank, etc. The oil pump is arranged between the oil tank and the oil cylinder through the oil delivery pipe, and 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, thereby realizing telescoping.

[0099] In this embodiment, the telescopic mechanism 400 is a hydraulic cylinder, a pneumatic cylinder or an electric push rod, which has simple structure, is easy to install and has good telescoping effect.

[0100] It should be noted that when the telescopic mechanism 400 is one, the telescopic mechanism 400 is one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod, and when the telescopic mechanism 400 is multiple, all the telescopic mechanisms 400 can also be one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod, that is, different telescopic mechanisms 400 can be of different types.

[0101] In some embodiments, the electric toothed disc structure further comprises:

[0102] 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, and a clearance cavity 702 is formed between the hole wall of the mounting hole 701 and the outer circumferential wall of the middle shaft 100, and the shaft sleeve 200 extends into the clearance cavity 702.

[0103] The above assembly seat 700 is used for mounting on the frame 800, as shown in Figure 2 and Figure 3 The assembly seat 700 is provided with a mounting hole 701, the middle shaft 100 is rotatably mounted in the mounting hole 701, and a clearance cavity 702 is formed between the hole wall of the mounting hole 701 and the outer circumferential wall of the middle shaft 100, and the shaft sleeve 200 extends into the clearance cavity 702.

[0104] 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, and both 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 to enable the middle shaft 100 to rotate, and the outer diameter of the middle shaft 100 is smaller than the hole diameter of the mounting hole 701, so that a displacement 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 can have part of the structure extending into the displacement cavity 702 when moving to any position along the axial direction of the middle shaft 100; the shaft sleeve 200 can have part of the structure extending into the displacement cavity 702 when moving to part of the position along the direction close to the assembly seat 700, and the shaft sleeve 200 is located outside one end of the assembly seat 700 as a whole when moving to part of the position along the direction away from the assembly seat 700. The specific length of the shaft sleeve 200 can be flexibly adjusted according to actual needs, which will not be described here.

[0105] In the embodiment, compared with the shaft sleeve 200 which can only move back and forth outside one end of the assembly seat 700, in the application, the displacement cavity 702 is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the middle shaft 100, and the shaft sleeve 200 can extend into the displacement cavity 702, thereby not only making the moving path of the shaft sleeve 200 longer, thereby making the adjustment range of the tooth disc 300 along the axial direction of the middle shaft 100 larger, but also making the shaft sleeve 200 extend longer along the axial direction of the middle shaft 100, thereby making the structural strength of the shaft sleeve 200 higher, and the installation stability of the shaft sleeve 200 better, which can reduce the shaking of the tooth disc 300, thereby further improving the riding experience.

[0106] It can be understood that if the shaft sleeve 200 can only move back and forth outside 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 middle shaft 100 and the assembly seat 700 is certain, in order to enable the shaft sleeve 200 to move a certain displacement along the axial direction of the middle shaft 100, the length of the shaft sleeve 200 can only be set shorter, so that the structural strength is low, and the stability is poor, the tooth disc 300 is easy to shake, and the riding experience is affected, and in the application, the displacement 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 middle shaft 100, which can effectively solve the above problems.

[0107] In some embodiments, the tooth disc 300 can be mounted at the end of the shaft sleeve 200 away from the assembly seat 700, and when the shaft sleeve 200 moves to any position along the axial direction of the middle shaft 100, the end of the shaft sleeve 200 away from the tooth disc 300 is located in the displacement cavity 702.

[0108] In this embodiment, the shaft sleeve 200 is arranged to extend along the axis of the middle shaft 100 for a longer distance, and the structure of the shaft sleeve 200 is stronger, and the installation stability of the shaft sleeve 200 is better, and the shaking of the toothed disc 300 can be reduced, and the riding experience can be further improved, and in addition, the interference between the shaft sleeve 200 and the assembly seat 700 when the shaft sleeve 200 enters the accommodation cavity 702 can be avoided, and the movement of the shaft sleeve 200 is smoother.

[0109] In some embodiments, the electric control toothed disc structure further comprises:

[0110] The first bearing 500 is installed at the end of the mounting hole 701 away from the toothed disc 300;

[0111] The second bearing 600 is installed at the end of the mounting hole 701 close to the toothed disc 300;

[0112] The middle shaft 100 is rotatably installed in the first bearing 500 and the second bearing 600.

[0113] In this embodiment, the rotation of the middle shaft 100 is realized 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.

[0114] In some embodiments, a limiting protrusion 101 is arranged on the outer peripheral wall of the middle shaft 100 and on the side of the first bearing 500 close to the shaft sleeve 200 to provide a restriction in one direction, and an axial locking structure 501 is arranged on the outer peripheral wall of the middle shaft 100 and on the side of the first bearing 500 away from the shaft sleeve 200, so as to realize the restriction of the first bearing 500 in the other direction, and at the same time, the movement of the middle shaft 100 in the axial direction is limited. For example, the axial locking structure 501 can be an axial locking nut, the outer peripheral wall of the end of the middle shaft 100 away from the shaft sleeve 200 can be provided with external threads, and the axial locking nut is threadedly connected with the middle shaft 100. Of course, the axial locking structure 501 can also be a locking ring, the outer peripheral wall of the end of the middle shaft 100 away from the shaft sleeve 200 can be provided with a snap ring, and the axial locking is arranged in the snap ring.

[0115] In some embodiments, as shown in Figure 3 the first locking screw plug 502 is arranged on the side of the first bearing 500 away from the shaft sleeve 200 on the assembly seat 700 or the frame 800, and the first locking screw plug 502 is located on the outer peripheral side of the axial locking structure 501 to realize the fixation of the first bearing 500. The second locking screw plug 601 can be arranged on the side of the second bearing 600 away from the first bearing 500 on the assembly seat 700 or the frame 800, and the second locking screw plug 601 can be located on the outer side of the shaft sleeve 200 to realize the fixation of the second bearing 600.

[0116] It should be noted that when there is a gap between the first locking plug 502 and the axial locking structure 501, a first sealing ring 503 can be arranged between the first locking plug 502 and the axial locking structure 501. When there is a gap between the second locking plug 601 and the shaft sleeve 200, a second sealing ring 602 can be arranged between the second locking plug 601 and the shaft sleeve 200.

[0117] In some embodiments, the first bearing 500 can be a ball bearing. In this embodiment, by taking advantage of the strong axial bearing capacity of the ball bearing, the axial force during movement of the tooth disc 300 can be better borne, and the shaft 100 can be better fixed through the ball bearing.

[0118] It should be noted that the first bearing 500 can also be other suitable types of bearings, which will not be described here.

[0119] In some embodiments, the second bearing 600 is arranged as a needle bearing and is sleeved on the outside of the shaft sleeve 200, and the shaft sleeve 200 can move relative to the second bearing 600 along the axial direction of the shaft 100.

[0120] The above-mentioned second bearing 600 can be an inner ringless needle bearing, and the end of the shaft sleeve 200 away from the tooth disc 300 can extend into the second bearing 600 as the inner ring of the second bearing 600.

[0121] In this 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 force 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 along the axial direction of the shaft 100, thereby reducing the axial friction force on the outer peripheral wall of the shaft sleeve 200, making the movement of the shaft sleeve 200 along the axial direction of the shaft 100 more smooth, and the shifting of the tooth disc 300 more smooth. In addition, the shaft sleeve 200 can also support the second bearing 600, making the installation of the second bearing 600 more stable.

[0122] It should be noted that the second bearing 600 can also be other suitable types of bearings, which will not be described here.

[0123] In some embodiments, the electrically controlled tooth disc structure further comprises:

[0124] The assembly seat 700 is used for mounting on the frame 800, the shaft 100 is rotatably mounted on the assembly seat 700, and the telescopic mechanism 400 is arranged on the assembly seat 700.

[0125] In this embodiment, by arranging the middle shaft 100 and the telescopic mechanism 400 in the assembly seat 700, the entire electric control gear structure can be arranged as an assembly structure, and the entire electric control gear structure can be quickly installed and replaced through the assembly seat 700, thereby providing better use experience for the user.

[0126] In some embodiments, the electric control gear structure further comprises:

[0127] The third bearing 900 is arranged on the shaft sleeve 200 and / or the gear plate 300 and is coaxial with the shaft sleeve 200. The third bearing 900 is connected to the telescopic mechanism 400, and the shaft sleeve 200 rotates relative to the telescopic mechanism 400 through the third bearing 900.

[0128] The third bearing 900 can include an inner ring and an outer ring that rotate relative to each other. One of the inner ring and the outer ring is fixedly connected to the shaft sleeve 200 and / or the gear plate 300, and the other is fixedly connected to the telescopic mechanism 400. The shaft sleeve 200 rotates relative to the telescopic mechanism 400 through the relative rotation of the inner ring and the outer ring. The structure is simple, and the shaft sleeve 200 can rotate relative to the telescopic mechanism 400 at any angle, which is more practical.

[0129] It should be noted that one of the inner ring and the outer ring can be fixedly connected to the shaft sleeve 200, or fixedly connected to the gear plate 300, or fixedly connected to both the shaft sleeve 200 and the gear plate 300.

[0130] In some embodiments, as shown in FIG. 1, the telescopic mechanism 400 is arranged in multiple numbers and uniformly arranged along the circumference of the shaft sleeve 200. For example, the telescopic mechanism 400 can be three, four or other suitable number, and the multiple telescopic mechanisms 400 are uniformly arranged along the circumference of the shaft sleeve 200. Figure 3 In this embodiment, when the shaft sleeve 200 is driven, the shaft sleeve 200 is subjected to more uniform stress, thereby making the shaft sleeve 200 slide more smoothly.

[0131] In some embodiments, the length of the shaft 100 along the axial direction thereof is 1.2 to 3 times the moving stroke of the shaft sleeve 200.

[0132] The length of the shaft sleeve 200 along the axial direction thereof can be 1.2, 2, 2.5, 3 or other suitable multiple of the moving stroke of the shaft sleeve 200. In this way, it can not only avoid the moving stroke of the shaft sleeve 200 being too low due to the shaft sleeve 200 being too long, thereby affecting the gear shifting effect of the gear plate 300, but also avoid the structure strength of the shaft sleeve 200 being reduced and the installation being unstable due to the shaft sleeve 200 being too short.

[0133]

[0134] ​In some embodiments, a key structure is installed between the middle shaft 100 and the shaft sleeve 200, and the relative rotation between the middle shaft 100 and the shaft sleeve 200 is limited by the key structure. For example, the outer circumferential wall of the middle shaft 100 and the inner circumferential wall of the shaft sleeve 200 are both provided with a key groove, the key groove extends along the axial direction of the middle shaft 100, the key structure is installed in the two key grooves and can slide relative to the key grooves along the axial direction of the middle shaft 100. Alternatively, one of the outer circumferential wall of the middle shaft 100 and the inner circumferential wall of the shaft sleeve 200 is provided with a key groove, the key groove extends along the axial direction of the middle shaft 100, and the key structure is installed in the other and extends into the key groove, the key structure can slide relative to the key groove along the axial direction of the middle shaft 100.

[0135] In the embodiment, the relative rotation between the middle shaft 100 and the shaft sleeve 200 is limited by the key structure, and the middle shaft 100 can drive the gear disc 300 on the shaft sleeve 200 to rotate.

[0136] The embodiments of the present application also provide a bicycle, which comprises the external intelligent gear shifting system as described above. Since the bicycle has the external intelligent gear shifting system, the bicycle has all the beneficial effects brought by the external intelligent gear shifting system.

[0137] The above is only a specific embodiment 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. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. An external intelligent variable speed system, characterized by, include: Multiple status detection units, each of which is used to collect at least one of bicycle operating parameters and / or at least one of human functional parameters; The main controller is electrically connected to multiple status detection units. A flywheel speed changer, connected to the main controller, is used to adjust the gears of the flywheel; An electronically controlled crankset structure includes a bushing, a telescopic mechanism, and an electronically controlled drive unit. The bushing is fitted onto the bottom bracket and can move axially along the bottom bracket. The bushing and the bottom bracket are fixed relative to each other in the circumferential direction of the bottom bracket. The bushing is mounted on the crankset. The bottom bracket is rotatably mounted on the frame. The telescopic mechanism is located outside the bottom bracket and is connected to the bushing and / or the crankset. The electronically controlled drive unit is mounted on the frame and is used to drive the telescopic mechanism to operate, causing the telescopic mechanism to extend and retract, driving the bushing to move axially along the bottom bracket. The bushing can rotate relative to the telescopic mechanism. The electronically controlled drive unit is electrically connected to the main controller.

2. The externally intelligent transmission system of claim 1, wherein The plurality of said state detection units include at least: A lactic acid detection device, communicatively connected to the main controller, is used to detect lactic acid in the human body; and / or, A heart rate detection device, communicatively connected to the main controller, is used to detect human heart rate; and / or, A blood pressure detection device, which is communicatively connected to the main controller, is used to detect human blood pressure.

3. The external intelligent shifting system according to claim 1 or 2, characterized in that, The plurality of state detection units include: The torque detection unit, communicatively connected to the main controller, is used to detect the output torque of human footsteps; and / or, The cadence detection unit is connected in communication with the main controller and is used to detect the cadence of the human body when pedaling the crank.

4. The externally intelligent transmission system of claim 3, wherein The torque detection unit is mounted on the crank and / or chainring and / or bottom bracket; and / or, The cadence detection unit is mounted on the crank and / or chainring and / or bottom bracket.

5. The externally intelligent transmission system of claim 1, wherein The electronically controlled crankcase structure also includes: The position detection unit, electrically connected to the main controller, is used to obtain the position of the toothed chain on the central axis.

6. The externally intelligent transmission system of claim 1, wherein The electronically controlled crankcase structure also includes: An assembly seat is provided for mounting on the vehicle frame. The assembly seat has a mounting hole, and the central shaft is rotatably mounted in the mounting hole. A clearance cavity is formed between the wall of the mounting hole and the outer peripheral wall of the central shaft, and the clearance cavity allows the bushing to extend into it.

7. The externally intelligent transmission system of claim 6, wherein The electronically controlled crankcase structure also includes: A first bearing is installed at the end of the mounting hole away from the toothed disc; The second bearing is installed at one end of the mounting hole near the toothed disc; The central shaft is rotatably mounted within the first bearing and the second bearing.

8. The externally intelligent transmission system of claim 1, wherein The electronically controlled crankcase structure also includes: An assembly base is used to mount the vehicle frame, the central shaft is rotatably mounted on the assembly base, and the telescopic mechanism is located on the assembly base.

9. The externally intelligent transmission system of claim 1, wherein The electronically controlled crankcase structure also includes: A third bearing is disposed on the bushing and / or the toothed disc and is coaxial with the bushing. The third bearing is connected to the telescopic mechanism, and the bushing rotates relative to the telescopic mechanism through the third bearing.

10. A bicycle characterized in that, Includes the external intelligent transmission system as described in any one of claims 1 to 9.

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