External self-adaptive speed control system and bicycle

Abstract

According to the external self-adaptive speed change system and the bicycle, by arranging a torque detection unit and a pedaling frequency detection unit, the output torque and pedaling frequency can be obtained, then the riding state of a rider can be determined, a main controller is connected to a flywheel speed change device, and therefore the riding state of the rider can be determined. According to the technical scheme, the main controller can have the capability of controlling the flywheel speed change device to shift gears, so that self-adaptive adjustment of flywheel gears is completed in the riding process of a rider, meanwhile, the movable shaft sleeve is arranged on the middle shaft, and the crankset is arranged on the shaft sleeve; furthermore, an external telescopic mechanism can be controlled by the electric control driving unit to drive the shaft sleeve to move along the middle shaft, so that the chain wheel can move along the middle shaft, 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 adaptive gear shifting system and a bicycle. BACKGROUND

[0002] Nowadays, the gear shifting of a variable speed bicycle still needs to be manually operated by a rider. During the riding process, whether encountering a change in slope or wanting to adjust the riding speed, the rider needs to judge when to shift gears according to his own experience, which puts a high requirement on the experience accumulation of the rider. Novices often have difficulty in accurately grasping it. If the shifting operation is improper, a significant jerk will occur during the riding process, which not only increases the physical consumption of the rider and reduces the riding efficiency, but also causes the sprocket and the chain to form a large angle in most gear positions during the shifting, resulting in further reduction of the riding efficiency and poor overall riding experience. CONTENT OF THE UTILITY MODEL

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

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

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

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

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

[0008] a freewheel gear shifting device connected with the main controller for adjusting the gear position of a freewheel;

[0009] an electrically controlled sprocket structure comprising 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 for rotatingly installing 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 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 contraction, the shaft sleeve can rotate relative to the extension mechanism, and the electrically controlled driving unit is electrically connected with the main controller.

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

[0011] The external adaptive variable speed system and the bicycle provided by the embodiment of the present application can obtain the output torque and the pedaling frequency through the torque detection unit and the pedaling frequency detection unit, and then determine the riding state of the rider. The main controller is connected to the freewheel variable speed device, so that the main controller has the ability to control the gear shifting of the freewheel variable speed device, to realize the adaptive adjustment of the freewheel gear position during the rider's riding. Meanwhile, the movable shaft sleeve is arranged on the middle shaft, and the toothed disc is arranged on the shaft sleeve, so that the movable shaft sleeve is driven to move along the middle shaft by the external telescopic mechanism driven by the electric control driving unit, so that the toothed disc can move along the middle shaft, so that the included angle between the chain and the toothed disc is effectively reduced, thereby improving the riding efficiency of the bicycle user.

[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 external adaptive variable speed system provided by the embodiment of the present application;

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

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

[0017] Reference Signs:

[0018] Middle shaft 100; limiting protrusion 101;

[0019] Shaft sleeve 200;

[0020] Toothed disc 300;

[0021] Telescopic mechanism 400;

[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; accommodation cavity 702;

[0025] Frame 800;

[0026] Third bearing 900;

[0027] crank connecting shaft 1000;

[0028] flywheel 1100;

[0029] main controller 1201; position detection unit 1202; wireless communication module 1203; torque detection unit 1204; pedaling frequency detection unit 1205; human-computer interaction unit 1206; lactic acid detection device 1207; heart rate detection device 1208; blood pressure detection device 1209; electric control driving unit 1210. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0031] In the description of the present application, if the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features or implying the order of the indicated technical features.

[0032] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] The technical solutions of the present application will be described in detail below in combination with the drawings. Obviously, the following described embodiments are only part of the embodiments of the present application, not all embodiments.

[0035] Referring to Figure 1 The external adaptive speed change system provided by an embodiment of the present application includes:

[0036] The torque detection unit 1204 is configured to detect the output torque of the human body pedaling;

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

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

[0039] The flywheel speed change device is connected with the main controller 1201 and is used for adjusting the gear position of the flywheel 1100.

[0040] The electric control toothed 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 toothed disc 300. The middle shaft 100 is used for rotatingly installing the toothed 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 toothed 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.

[0041] In the embodiment, the torque detection unit 1204 and the pedal frequency detection unit 1205 are arranged, so that the output torque and the pedal frequency can be obtained, and the riding state of the rider can be determined. The main controller 1201 is connected with the flywheel speed change device, so that the main controller 1201 has the ability to control the gear shifting of the flywheel speed change device, so as to realize the self-adaptive adjustment of the gear position of the flywheel 1100 during the rider rides. 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. Then, the electric control driving unit 1210 can control the external extension mechanism 400 to drive the shaft sleeve 200 to move along the middle shaft 100, so that the toothed disc 300 can move along the middle shaft 100, so as to effectively reduce the included angle between the chain and the toothed disc 300, thereby improving the riding efficiency of the bicycle user.

[0042] The torque detection unit 1204 can be a torque sensor, a stress sensor or the like. The torque detection unit 1204 can be installed on the crank, the middle shaft 100 or the like, so as 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 or the like. The pedal frequency detection unit 1205 can directly detect the rotation frequency of the crank, the toothed disc 300 or the like, so as 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 position 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 for controlling gear shifting of the freewheel 1100, 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 is controlled to shift up when the human body is in a state of effort, and the freewheel 1100 is controlled to shift down when the human body is in a state of too much ease. How to determine the riding state by using the torque and the pedaling frequency can be achieved in many ways. For example, the product of the torque and the 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 a weighted operation on the torque and the pedaling frequency, so that a better 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 are then 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, thereby driving the middle shaft 100 to rotate.

[0049] The aforementioned bushing 200 is fitted onto the outer side of the central shaft 100 and can move along the central shaft 100. After the chainring 300 is fixed on the bushing 200, the chainring 300 can move along the central shaft 100, thereby adjusting the relative position of the chainring 300 and the central shaft 100. The bushing 200 and the central shaft 100 are relatively fixed in the circumferential direction so that when the central shaft 100 rotates, it can drive the bushing 200 to rotate, thereby driving the chainring 300 to rotate.

[0050] Furthermore, the length of the bushing 200 can be flexibly adjusted according to actual needs, for example, Figure 3 As shown, when the design length is long, the bushing 200 can be extended between the central shaft 100 and the bearing system used to mount the central shaft 100. When the design length is short, it does not need to extend between the central shaft 100 and the bearing system used to mount the central shaft 100, and the entire bushing remains outside the bearing system. It should be noted that both the long and short bushing 200 have their advantages. When the demand for moving drive of the sprocket 300 is relatively small, a shorter bushing 200 can be considered.

[0051] The aforementioned telescopic mechanism 400 is located outside the bottom bracket 100. For example, it can be mounted on the assembly seat 700 or directly on the frame 800. The telescopic mechanism 400 can be connected to the bushing 200, the chainring 300, or both. The telescopic direction of the telescopic mechanism 400 can be along the axis of the bottom bracket 100, or slightly offset relative to the axis of the bottom bracket 100. The telescopic mechanism 400 can drive the bushing 200 to move through its own telescopic movement, thereby adjusting the relative position of the chainring 300 and the bottom bracket 100, and further adjusting the relative position between the chainring 300 and the freewheel 1100, thus adjusting the angle between the chain and the chainring 300. It should be noted that the bushing 200 can rotate circumferentially relative to the telescopic mechanism 400.

[0052] The aforementioned electronically controlled drive unit 1210 can drive the telescopic mechanism 400 to operate, thereby enabling the telescopic mechanism 400 to extend and retract, thereby moving the bushing 200 and / or the chainring 300 to adjust the relative position between the chainring 300 and the freewheel 1100, and thus adjusting the angle between the chain and the chainring 300.

[0053] The aforementioned electronically controlled drive unit 1210 is controlled by the main controller 1201, that is, the electronically controlled drive unit 1210 can be operated by the main controller 1201.

[0054] Specifically, the electric control driving unit 1210 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 1210 can be a hydraulic driving system. 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 or the rod cavity of the hydraulic cylinder. When the telescopic mechanism 400 is a pneumatic cylinder, the electric control driving unit 1210 can be a pneumatic driving system. 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 1210 can be a power supply unit. 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 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, when there is no position detection function, the power-on time of the electric control driving unit 1210 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 (such as 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 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.

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

[0058] 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,

[0059] 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,

[0060] 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.

[0061] In this embodiment, considering that the state of lactic acid, heart rate and blood pressure can effectively reflect the function state of the human body, a lactic acid detection device 1207, a heart rate detection device 1208 and a blood pressure detection device 1209 are introduced to realize detection of the lactic acid, heart rate and blood pressure of the rider, so that the gear can be timely lowered when the lactic acid is high, the heart rate is too high, and the blood pressure is high, to avoid injury to the rider.

[0062] It should be noted that the three of lactic acid, heart rate and blood pressure can be selectively combined with the pedaling frequency and torque according to actual needs. One of them can be combined with the pedaling frequency and torque, or multiple of them can be selected. When multiple of them are selected, the multiple parameters can be comprehensively considered with the previously obtained pedaling frequency and torque. For example, the product of all selected parameters, and the calculation value of the result of weighted calculation of all selected parameters can be used to control the gear position. The specific control mode can refer to the previously described pedaling frequency and torque control mode.

[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 the smart wearable device. 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 provided with separate detection modules. These detection modules can be connected to the main controller 1201 through data lines. When in use, the detection modules are installed on the rider. When not in use, they can be mounted on the bicycle.

[0065] 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,

[0066] The pedaling frequency detection unit 1205 is arranged on the crank and / or the pedal 300 and / or the middle shaft 100.

[0067] The torque detection unit 1204 described above is arranged on the crank, the pedal 300 or the middle shaft 100. In theory, torque detection can be realized. Although the values directly detected by different positions may be different, they can be preprocessed through simple mathematical operations to obtain an output torque that can represent the output torque formed by the rider pedaling the pedal.

[0068] The torque detection unit 1204 described above can include multiple torque sensors. In this case, torque sensors can be arranged at multiple positions of the crank, the pedal 300 and the middle shaft 100. Subsequently, mean value calculation can be performed after normalization processing to obtain the most accurate torque and eliminate errors caused by single sensor collection.

[0069] 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, they can be obtained by simple preprocessing to represent the torque formed by the rider pedaling the pedal.

[0070] 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, after normalization processing, mean value calculation can be performed to obtain the pedal frequency closest to the true pedal frequency and eliminate errors caused by a single sensor.

[0071] In some embodiments, with reference to Figure 1 , the external adaptive gear shifting system further comprises:

[0072] The human-computer interaction unit 1206 is in communication connection with the main controller 1201.

[0073] 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.

[0074] It should be noted that in the case of other smart 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 smart terminal, to complete the adjustment of the pre-set threshold or threshold range.

[0075] In some embodiments, with reference to Figure 1 , the electrically controlled chainring structure further comprises:

[0076] 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.

[0077] In the present embodiment, the position detection unit 1202 can be arranged to directly determine the current position of the chainring 300, and then the main controller 1201 can be facilitated to adaptively 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, so as to reduce the inclination angle of the chain.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] In some embodiments, the electric toothed disc structure further includes:

[0082] The power storage unit is used to provide power for the electric drive unit 1210 and the main controller 1201.

[0083] In the embodiment, the power storage unit is directly used as a power supply, for example, a lithium battery or other storage battery. This can effectively improve the user experience, and the user does not need to externally connect a mobile power supply for power supply.

[0084] In some embodiments, the electric drive unit 1210 and the main controller 1201 can be powered by a mobile power supply.

[0085] In some embodiments, referring to Figure 1 , the electric toothed disc structure further includes:

[0086] The wireless communication module 1203 is electrically connected to the main controller 1201.

[0087] 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.

[0088] The wireless communication module 1203 can be a Bluetooth module, a WIFI module, etc. The specific type can be selected according to actual needs.

[0089] 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,

[0090] The telescopic mechanism 400 is at least one of a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] In some embodiments, the electric toothed disc structure further comprises:

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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 short, 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.

[0100] 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.

[0101] 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.

[0102] In some embodiments, the electric control toothed disc structure further comprises:

[0103] The first bearing 500 is installed at the end of the mounting hole 701 away from the toothed disc 300.

[0104] The second bearing 600 is installed at the end of the mounting hole 701 close to the toothed disc 300.

[0105] The middle shaft 100 is rotatably installed in the first bearing 500 and the second bearing 600.

[0106] In this embodiment, the rotation of the middle shaft 100 can be achieved by using 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.

[0107] 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 achieve 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.

[0108] In some embodiments, as shown in Figure 3 A first locking 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, and the first locking plug 502 is located on the outer peripheral side of the axial locking structure 501 to fix the first bearing 500. A second locking 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, and the second locking plug 601 can be located on the outer side of the shaft sleeve 200 to fix the second bearing 600.

[0109] 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.

[0110] In some embodiments, the first bearing 500 can be a ball bearing. In this embodiment, the ball bearing has strong axial bearing capacity, which can better bear the axial force when the tooth disc 300 moves, and the ball bearing can better fix the shaft 100.

[0111] It should be noted that the first bearing 500 can also be other suitable types of bearings, which will not be described here.

[0112] 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.

[0113] 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.

[0114] 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 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 on the outer peripheral wall of the shaft sleeve 200, making the shaft sleeve 200 move along the axial direction of the shaft 100 more smoothly, and the tooth disc 300 shifting more smoothly. In addition, the shaft sleeve 200 can also support the second bearing 600, making the second bearing 600 more stable.

[0115] It should be noted that the second bearing 600 can also be other suitable types of bearings, which will not be described here.

[0116] In some embodiments, the electrically controlled tooth disc structure further comprises:

[0117] 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.

[0118] 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.

[0119] In some embodiments, the electric control gear structure further comprises:

[0120] 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.

[0121] 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.

[0122] 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.

[0123] In some embodiments, as shown in Figure 3 The telescopic mechanism 400 can be three, four, or any other suitable number, and the plurality of telescopic mechanisms 400 are uniformly arranged along the circumference of the shaft sleeve 200.

[0124] In this embodiment, when the shaft sleeve 200 is driven, the shaft sleeve 200 is stressed more uniformly, and the sliding of the shaft sleeve 200 is smoother.

[0125] 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.

[0126] The length of the shaft sleeve 200 along the axial direction thereof can be 1.2, 2, 2.5, 3, or any other suitable multiple of the moving stroke of the shaft sleeve 200. In this way, the moving stroke of the shaft sleeve 200 can be prevented from being too low due to the excessive length of the shaft sleeve 200, thereby affecting the gear shifting effect of the gear plate 300, and the structure strength of the shaft sleeve 200 can be prevented from being reduced and the installation of the shaft sleeve 200 can be prevented from being unstable due to the excessive shortness of the shaft sleeve 200.

[0127] In some embodiments, as shown inFigure 3 As shown, the 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 peripheral wall of the middle shaft 100 and the inner peripheral 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 peripheral wall of the middle shaft 100 and the inner peripheral 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 on the other and extends into the key groove, and the key structure can slide relative to the key groove along the axial direction of the middle shaft 100.

[0128] In this 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.

[0129] The embodiments of the present application also provide a bicycle, which comprises the external adaptive derailleur as described above. Since the bicycle has the external adaptive derailleur, the bicycle has all the beneficial effects brought by the external adaptive derailleur.

[0130] The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that the protection scope of the present application should not be limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the present application, and these modifications or replacements should be covered in the protection scope of the present application.

Claims

1. An externally mounted adaptive transmission system, characterized by, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

2. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

3. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

4. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

5. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

6. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

7. The externally located adaptive transmission system of claim 6, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

8. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

9. The externally located adaptive transmission system of claim 1, wherein, The application relates to an external adaptive speed change system. The application relates to an external adaptive speed change system.

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