Electrically controlled moving tooth disc mechanism, transmission system and bicycle

Abstract

This application discloses an electronically controlled moving chainring mechanism, a shifting system, and a bicycle. The bottom bracket is installed in a cylinder body and is fixed circumferentially to the bushing. The piston is detachably connected to the bushing. When the pedal drives the bottom bracket to rotate, the bottom bracket drives the bushing to rotate, which in turn drives the chainring to rotate. When the freewheel shifts gears, the electronically controlled drive mechanism can actively drive the piston to move axially, and drive the bushing and chainring to adjust their positions synchronously, thereby reducing the angle between the chain, chainring, and freewheel, and improving riding efficiency. Furthermore, the reduced angle expands the meshing range between the chain and the teeth, reducing chain slippage, asymmetrical wear, and axial stress, lowering the risk of tooth deformation, and extending the service life of components. Compared to the traditional passive adjustment method of the chain driving the chainring, this embodiment actively controls the chainring movement through an electronically controlled drive mechanism, resulting in smoother and more precise chainring movement, avoiding jamming, and ensuring stable positioning after reaching the correct position, thus improving riding stability.

Description

Technical Field

[0001] This application relates to the field of bicycles, and in particular to an electronically controlled moving chainring mechanism, a shifting system, and a bicycle. Background Technology

[0002] The derailleur system, as a key component of a multi-speed bicycle, plays a crucial role in its performance. In traditional derailleur systems, when the rider shifts gears, the chain moves between different levels on the freewheel. If an angle forms between the end of the chain around the freewheel and the end around the chainring, it causes chain slack. This slack causes ineffective dissipation of the chain's driving force along the bottom bracket axis, significantly reducing the chain's transmission efficiency and impacting the rider's riding efficiency and experience. Furthermore, chain slack can easily lead to problems such as uneven shifting, chain slippage, asymmetrical wear of the teeth, and tooth deformation, shortening the bicycle's lifespan. Utility Model Content

[0003] This application aims to provide an electronically controlled moving chainring mechanism, a gear shifting system, and a bicycle, which can improve the rider's riding experience and extend the bicycle's service life.

[0004] The electrically controlled moving crank mechanism according to a first aspect embodiment of this application includes:

[0005] A drive cylinder includes a cylinder body and a piston, the cylinder body being mounted on a vehicle frame, and the piston being slidably mounted within the cylinder body;

[0006] A central shaft is rotatably mounted inside the cylinder, with both ends of the central shaft extending out of the cylinder.

[0007] A bushing is fitted onto the central shaft and can slide along the axial direction of the central shaft. The bushing and the central shaft are fixed relative to each other in the circumferential direction of the central shaft. The piston is detachably connected to the bushing.

[0008] The toothed disc is connected to one end of the bushing;

[0009] An electronically controlled drive mechanism is used to adjust the injection state of the medium entering the cylinder so that the piston moves axially along the central shaft and drives the bushing to move synchronously.

[0010] The control module is electrically connected to the electronically controlled drive mechanism and is used to control the operation of the electronically controlled drive mechanism.

[0011] A bicycle gear shifting system according to a second aspect embodiment of this application includes:

[0012] The electrically controlled moving tooth plate mechanism as described in the first aspect embodiment;

[0013] The flywheel speed changer is connected to the control module and is used to adjust the flywheel's gear position.

[0014] The bicycle according to a third aspect embodiment of this application includes the bicycle gear shifting system as described in the first aspect embodiment.

[0015] The electronically controlled moving chainring mechanism, gear shifting system, and bicycle of this application embodiment feature a bottom bracket mounted within a cylinder body and fixed circumferentially to a bushing. The piston and bushing are detachably connected. When the pedals rotate the bottom bracket, the bottom bracket rotates the bushing, which in turn rotates the chainring. When the freewheel shifts gears, the electronically controlled drive mechanism actively drives the piston to move axially, simultaneously adjusting the bushing and chainring positions. This reduces the angle between the chain, chainring, and freewheel, improving riding efficiency. Furthermore, the reduced angle expands the chain-tooth engagement range, reducing chain slippage, asymmetrical wear, and axial stress, lowering the risk of tooth deformation, and extending component lifespan. Compared to the traditional passive adjustment method of the chain-driven chainring, this application embodiment utilizes an electronically controlled drive mechanism for active control, resulting in smoother and more precise chainring movement, preventing jamming, and ensuring stable positioning after reaching its destination, thus improving riding stability.

[0016] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram illustrating the connection between a traditional chainring and a freewheel.

[0019] Figure 2 This is a schematic diagram illustrating the fit between the chainring and the freewheel in this application;

[0020] Figure 3 An electrical system diagram of the electrically controlled moving crank mechanism provided in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the overall structure of the electrically controlled moving crank mechanism provided in the embodiments of this application;

[0022] Figure 5 A cross-sectional view of the electrically controlled moving toothed disc mechanism provided in an embodiment of this application;

[0023] Figure 6 for Figure 5 A magnified view of the area where the first annular limiting part is located;

[0024] Figure 7 for Figure 5 A magnified view of the area where the first bearing is located;

[0025] Figure 8 for Figure 5 A magnified view of the area where the second bearing is located.

[0026] Figure label:

[0027] Drive cylinder 100; cylinder body 101; piston 102; medium chamber 103; first chamber 104; second chamber 105; medium conveying pipe 106; first annular limiting part 107; second annular limiting part 108; drive source 109; reversing valve 110; first locking member 111; second locking member 112;

[0028] Central shaft 200; Abutment part 201;

[0029] 300 bushing; 301 annular recess;

[0030] Crankset 400;

[0031] First bearing 500;

[0032] Second bearing 600;

[0033] Isolation Department 700;

[0034] Frame 800;

[0035] Flywheel 900;

[0036] Control module 1010; display unit 1020; position detection unit 1030; torque detection unit 1040; cadence detection unit 1050; human-machine interaction unit 1060; lactic acid detection device 1070; heart rate detection device 1080; blood pressure detection device 1090. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] To better describe the electronically controlled moving chainring mechanism, bicycle, and bicycle shifting system of this application, a brief description is provided here of the 400° angle change between the chain and chainring during conventional bicycle gear shifting. (Reference) Figure 1 When the chain is in the highest gear (900) on the cassette, there is a large angle θ between the chain and the chainring 400. Because of this angle θ, a significant axial component of the chain's driving force cannot be used to drive the cassette 900, resulting in energy waste. Understandably, the larger the angle θ, the more energy is wasted. This embodiment reduces energy waste by decreasing the angle θ, thereby improving riding efficiency. (Reference) Figure 2 , Figure 2 The dashed rectangle can be understood as the position of the crankset 400 before it moves, and the solid rectangle can be understood as the position of the crankset 400 after it moves. The included angle after the movement is β, which is significantly smaller than the angle θ, thus effectively reducing the axial force component.

[0043] Based on the above scenario, the following describes the electronically controlled moving chainring mechanism, control method, device, equipment, medium, and bicycle according to embodiments of this application.

[0044] See Figures 3 to 8 As shown, one embodiment of this application provides an electrically controlled moving crank mechanism, which includes:

[0045] The drive cylinder 100 includes a cylinder body 101 and a piston 102. The cylinder body 101 is used to be mounted on the frame 800, and the piston 102 is slidably mounted in the cylinder body 101.

[0046] The central shaft 200 is rotatably mounted inside the cylinder body 101, with both ends of the central shaft 200 extending out of the cylinder body 101;

[0047] A bushing 300 is fitted onto a central shaft 200 and can slide along the axial direction of the central shaft 200. The bushing 300 and the central shaft 200 are relatively fixed in the circumferential direction of the central shaft 200. The piston 102 is detachably connected to the bushing 300.

[0048] The toothed sprocket 400 is connected to one end of the bushing 300;

[0049] An electronically controlled drive mechanism is used to adjust the injection state of the medium entering the cylinder 101 so that the piston 102 moves axially along the central shaft 200 and drives the bushing 300 to move synchronously.

[0050] The control module 1010 is electrically connected to the electric drive mechanism and is used to control the operation of the electric drive mechanism.

[0051] In this embodiment, the bottom bracket 200 is installed inside the cylinder 101 and is circumferentially fixed to the bushing 300. The piston 102 is detachably connected to the bushing 300. When the pedal drives the bottom bracket 200 to rotate, the bottom bracket 200 drives the bushing 300 to rotate, which in turn drives the chainring 400 to rotate. When the freewheel 900 shifts gears, the electronically controlled drive mechanism can actively drive the piston 102 to move axially and synchronously adjust the positions of the bushing 300 and the chainring 400, thereby reducing the angle between the chain and the chainring 400 and the freewheel 900, improving riding efficiency. Furthermore, the reduced angle expands the meshing range between the chain and the teeth, reducing chain slippage, asymmetrical wear, and axial force, lowering the risk of tooth deformation, and extending the service life of components. Compared to the traditional passive adjustment method of the chain driving the chainring 400, this embodiment actively controls the chainring 400 through an electronically controlled drive mechanism, resulting in smoother and more precise movement, avoiding jamming, and ensuring stable positioning after reaching its destination, thus improving riding stability.

[0052] Furthermore, the bottom bracket 200 and bushing 300 are located within the cylinder block 101. The sliding piston 102 directly drives the crankset 400 to move. This design is simple, convenient, and ingenious. The piston 102 is also detachable, making assembly of the crankset 400 mechanism easier and facilitating cleaning or replacement. Moreover, the bottom bracket 200 is mounted within the drive cylinder 100, forming a unified assembly that is more convenient for assembly onto or disassembly from the frame 800.

[0053] The aforementioned control module 1010 can use electronic control devices, such as electronic switches, electronic control panels, etc., to enable direct manual control of operation. In this case, the position that the drive chainring 400 can move to can be adjusted by the user based on their riding experience.

[0054] The aforementioned control module 1010 can also directly achieve automatic adjustment of the crankset position so that the crankset 400 is always in a better relative position with the freewheel 900.

[0055] The aforementioned drive cylinder 100 can be a hydraulic cylinder or a pneumatic cylinder. The frame 800 can be provided with mounting holes, and the drive cylinder 100 is installed in the mounting holes. The cylinder body 101 can be provided with mounting cavities, and the two ends of the mounting cavity can be through-holes. The piston 102 is slidably installed in the cylinder body 101. The sliding direction of the piston 102 can be horizontal, and the piston 102 is driven by a medium such as oil or gas.

[0056] The aforementioned electrically controlled drive mechanism can be a hydraulic drive system paired with a hydraulic cylinder, or a pneumatic drive system paired with a pneumatic cylinder. The control module 1010 controls the movement of the piston 102 along the axis by controlling the hydraulic oil injection state in the hydraulic cylinder or controlling the air injection state in the pneumatic cylinder.

[0057] The aforementioned central shaft 200 is rotatably mounted in the mounting cavity of the cylinder 101. The axial direction of the central shaft 200 can be parallel to the sliding direction of the piston 102. Both ends of the central shaft 200 extend out of the cylinder 101. Crank connecting shafts can be provided at both ends of the central shaft 200 for connecting cranks. The cranks are used to mount foot pedals. The rider rotates the cranks by using the foot pedals, thereby driving the central shaft 200 to rotate.

[0058] The aforementioned bushing 300 is fitted onto the central shaft 200 and can slide along the axial direction of the central shaft 200. The bushing 300 and the central shaft 200 are relatively fixed in the circumferential direction of the central shaft 200. Specifically, the central shaft 200 and the bushing 300 can be connected by a key. In this case, along the axial direction of the central shaft 200, the keyway for installing the key is longer than the key to facilitate the sliding of the bushing 300. Alternatively, the bushing hole of the bushing 300 can be set as a square hole, thus allowing the central shaft 200 and the bushing 300 to be relatively fixed in the circumferential direction of the central shaft 200. The piston 102 and the bushing 300 are detachably connected. For example, part of the bushing 300 is located inside the cylinder 101, and one end of the bushing 300 can extend out of the cylinder 101. The piston 102 and the part of the bushing 300 located inside the cylinder 101 are detachably connected. The piston 102 and the bushing 300 can be connected by snap-fit, interference fit, or fasteners, etc.

[0059] The aforementioned chainring 400 is connected to one end of the bushing 300. Specifically, the chainring 400 is connected to the end of the bushing 300 that extends out of the cylinder body 101. When the foot pedal drives the bottom bracket 200 to rotate, the bottom bracket 200 drives the bushing 300 to rotate, and the bushing 300 in turn drives the chainring 400 to rotate. The drive cylinder 100 can drive the piston 102 to slide, and the piston 102 can drive the bushing 300 to slide along the axial direction of the bottom bracket 200. The bushing 300 can then drive the chainring 400 to move along the axial direction of the bottom bracket 200, thereby adjusting the relative position of the chainring 400 and the bottom bracket 200.

[0060] In some implementations, such as Figure 5 , Figure 6 and Figure 8 As shown, the inner peripheral wall of the cylinder 101 has a groove, which surrounds the outer peripheral wall of the bushing 300 to form a medium cavity 103. The piston 102 is located in the medium cavity 103 to divide the medium cavity 103 along the axial direction of the central axis 200 to form a first cavity 104 and a second cavity 105. Both the first cavity 104 and the second cavity 105 are provided with connecting holes for connecting the medium delivery pipe 106.

[0061] Taking hydraulic oil as the medium as an example, the medium delivery pipe 106 is an oil pipe. Two connecting holes can be connected to a servo hydraulic station through the medium delivery pipe 106. The medium delivery pipe 106 can be equipped with a reversing valve 110. When the servo hydraulic station injects oil into the first chamber 104 through the medium delivery pipe 106 and extracts oil from the second chamber 105, it can drive the piston 102 to slide in one direction, thereby driving the bushing 300 to slide in one direction. After the reversing valve 110 reverses, the servo hydraulic station injects oil into the second chamber 105 through the medium delivery pipe 106 and extracts oil from the first chamber 104, thereby driving the piston 102 to slide in the opposite direction, thereby driving the bushing 300 to slide in the opposite direction, thus realizing the sliding adjustment of the bushing 300, thereby realizing the axial movement adjustment of the crankshaft 400 along the central shaft 200. The structure is simple, the operation is convenient, and the adjustment effect is good. Moreover, the outer peripheral wall of the bushing 300 and the inner peripheral wall of the cylinder body 101 form a medium cavity 103. Compared with traditional oil cylinders or air cylinders, the central shaft 200 passing through the cylinder body 101 does not need to pass through the medium cavity 103, thus it will not affect the medium in the medium cavity 103, nor will it affect the sealing of the medium cavity 103.

[0062] In some implementations, reference Figure 3 , Figure 5 An electronically controlled drive mechanism, including:

[0063] The drive source 109 is connected to the communication holes provided on the first cavity 104 and the second cavity 105 through the medium delivery pipe 106;

[0064] The reversing valve 110 is used to adjust the state of the medium injected by the drive source 109 into the first chamber 104 and the second chamber 105; both the reversing valve 110 and the drive source 109 are electrically connected to the control module 1010.

[0065] When hydraulic oil is used as the medium, the aforementioned drive source 109 can be a servo hydraulic station, and when air is used as the medium, an air pump can be used directly.

[0066] The aforementioned reversing valve 110 can control the entry of the medium into the first chamber 104 and the second chamber 105. Its specific functions have been described above and will not be repeated here.

[0067] In some embodiments, the drive cylinder 100 is configured as a hydraulic cylinder, and the drive source 109 is configured as a servo hydraulic station.

[0068] In this embodiment, a hydraulic cylinder is used as the drive cylinder 100. The hydraulic cylinder has strong driving force and the drive piston 102 slides more precisely, thereby improving the effect of moving and adjusting the drive bushing 300 and the toothed plate 400. At the same time, using a servo hydraulic station can also better improve the driving accuracy of the piston 102.

[0069] In some implementations, such as Figure 5 As shown, the groove is annular and surrounds the bushing 300, and the piston 102 is annular and surrounds the bushing 300.

[0070] In this embodiment, this configuration not only facilitates the machining of the groove and piston 102, but also improves the sliding effect of driving the piston 102. Furthermore, the bushing 300 can cooperate with the piston 102 when rotated to different angles, further improving the sliding effect of driving the bushing 300. In addition, the groove sealing is more convenient and has a better sealing effect.

[0071] In some embodiments, multiple grooves may be provided, arranged circumferentially along the bushing 300, and multiple pistons 102 may be provided correspondingly, arranged circumferentially along the grooves. For example, the outer peripheral wall of the bushing 300 may have an annular recess along the circumferential direction, the piston 102 may be engaged in the annular recess and be able to slide relative to the bushing 300 along the circumferential direction, and sealing portions may be provided on both sides of the piston 102, sealing the groove between the groove and the outer annular recess to achieve a sealing effect. By synchronously driving the sliding of multiple pistons 102, the multiple pistons 102 can jointly drive the bushing 300 to slide.

[0072] In this embodiment, multiple pistons 102 are provided. When one of the pistons 102 is damaged, the corresponding piston 102 can be replaced instead of replacing all the pistons 102, thus reducing costs.

[0073] In some implementations, such as Figure 5 , Figure 6 and Figure 8 As shown, the inner peripheral wall of the cylinder body 101 is provided with a first annular limiting part 107 and a second annular limiting part 108 arranged along the axial direction of the bushing 300. The first annular limiting part 107 and the second annular limiting part 108 extend along the circumferential direction of the bushing 300 and fit against the outer peripheral wall of the bushing 300. A groove is formed between the first annular limiting part 107 and the second annular limiting part 108.

[0074] In this embodiment, a first annular limiting part 107 and a second annular limiting part 108 are provided on the inner peripheral wall of the cylinder 101 to form a medium cavity 103. The structure is simple, and the first annular limiting part 107 and the second annular limiting part 108 can also naturally seal the medium cavity 103, resulting in better sealing performance.

[0075] In some implementations, such as Figure 5 , Figure 6 and Figure 8 As shown, one end of the bushing 300 is integrally formed with a flange, the sprocket 400 is connected to the flange, the first annular limiting part 107 is located on the side of the second annular limiting part 108 away from the sprocket 400, the inner peripheral wall of the cylinder body 101 protrudes to form the second annular limiting part 108, the first annular limiting part 107 is detachable, and after the first annular limiting part 107 and the piston 102 are disassembled, they can be taken out from the end of the cylinder body 101 away from the sprocket 400.

[0076] In this embodiment, the inner peripheral wall of the cylinder body 101 protrudes to form a second annular limiting part 108, meaning that the cylinder body 101 and the second annular limiting part 108 are integrally formed, which simplifies processing and improves sealing. The flange and bushing 300 are integrally formed, resulting in high structural strength. In this embodiment, since the flange and bushing 300 are integrally formed, and the first annular limiting part 107 is detachably connected to the cylinder body 101, during assembly, the bushing 300 can be inserted into the cylinder body 101 from the end near the gear 400. Then, the piston 102 is inserted into the cylinder body 101 from the end away from the gear 400 and connected to the bushing 300. Next, the first annular limiting part 107 is inserted into the cylinder body 101 from the end away from the gear 400 and connected to the cylinder body 101. When the piston 102 needs to be disassembled for maintenance, replacement, or cleaning, the first annular limiting part 107 is removed, and then the piston 102 is removed and pulled out from the end of the cylinder body 101 away from the gear 400. This avoids the situation where the flange is not detachable, making it difficult to install and remove the piston 102 from the end of the cylinder body 101 near the gear 400, thus making assembly and disassembly more convenient.

[0077] In some embodiments, the outer peripheral wall of the first annular limiting portion 107 is threadedly connected to the inner peripheral wall of the cylinder body 101.

[0078] The outer peripheral wall of the first annular limiting part 107 is provided with external threads, and the inner peripheral wall of the corresponding area of ​​the cylinder body 101 is provided with internal threads. The outer peripheral wall of the first annular limiting part 107 and the inner peripheral wall of the cylinder body 101 are connected by the mating of external and internal threads, which makes it more convenient to disassemble and assemble the first annular limiting part 107.

[0079] The aforementioned first annular limiting part 107 can also be engaged with the cylinder body 101.

[0080] In some embodiments, the above-mentioned electrically controlled moving crank mechanism further includes:

[0081] The first bearing 500 is installed in the cylinder 101 at the end away from the gear sprocket 400, and the central shaft 200 is installed in the first bearing 500;

[0082] The second bearing 600 is installed in the cylinder 101 at one end near the gear 400, and the outer peripheral wall of the bushing 300 is attached to the inner peripheral wall of the second bearing 600.

[0083] In this embodiment, the rotational installation of the central shaft 200 can be achieved using the first bearing 500 and the second bearing 600, satisfying the rotational requirements of the central shaft 200 and making its rotation smoother. Furthermore, the second bearing 600 can also support the bushing 300, making its sliding and rotation smoother.

[0084] It should be noted that the bushing 300 can be clearance-fitted with the second bearing 600, thereby allowing relative sliding between them. A first locking member 111 can be provided on the side of the first bearing 500 and the second bearing 600 that is opposite to each other, to lock and position the first bearing 500 and the second bearing 600. For example, there can be two first locking members 111 for locking the first bearing 500. One first locking member 111 can be threaded or snapped into the central shaft 200 to abut against the inner ring of the first bearing 500, and the other first locking member 111 can be threaded or snapped into the cylinder body 101 to abut against the outer ring of the first bearing 500. There can be only one first locking member 111 for locking the second bearing 600, which is threaded or snapped into the cylinder body 101.

[0085] In some implementations, such as Figure 5 and Figure 8 As shown, the second bearing 600 is located on the side of the second annular limiting part 108 near the toothed plate 400, and an isolation part 700 is provided between it and the second annular limiting part 108. The isolation part 700 abuts against the inner ring of the second bearing 600.

[0086] The aforementioned isolation section 700 may be annular and fitted onto the outside of the bushing 300.

[0087] In this embodiment, the second bearing 600 is located on the side of the second annular limiting part 108 near the gear 400, making disassembly and assembly more convenient and providing better support for the bushing 300. The isolation part 700 not only limits the movement of the second bearing 600 but also separates it from the second annular limiting part 108, preventing the second annular limiting part 108 from interfering with the operation of the second bearing 600.

[0088] In some implementations, such as Figure 5 , Figure 7 As shown, the outer peripheral wall of the central shaft 200 has an abutment portion 201, which abuts against the side of the first bearing 500 near the toothed plate 400. An annular recess 301 is formed on the inner side of the end of the bushing 300 away from the toothed plate 400. The annular recess 301 extends circumferentially along the bushing 300. When the bushing 300 slides toward the first bearing 500, the abutment portion 201 can extend into the annular recess 301.

[0089] In this embodiment, an abutment portion 201 is provided to limit the first bearing 500. The abutment portion 201 is integrally formed through the outer peripheral wall of the central shaft 200, which facilitates processing. An annular recess 301 is formed on the inner side of the end of the bushing 300 away from the crankcase 400. When the bushing 300 slides toward the first bearing 500, the abutment portion 201 can extend into the annular recess 301. This makes the movement path of the bushing 300 longer, and thus the movement path of the crankcase 400 longer.

[0090] In some implementations, reference Figure 5 , Figure 7 and Figure 8 As shown, the frame 800 may be provided with second locking members 112 at both ends of the cylinder 101. The second locking members 112 and the frame 800 may be threaded or snapped together. The second locking members 112 limit the cylinder 101 to prevent the cylinder 101 from moving at will.

[0091] In some embodiments, the electrically controlled moving crank mechanism further includes:

[0092] The display unit 1020 is mounted on the frame 800 and is electrically connected to the control module 1010.

[0093] In this embodiment, by providing a display unit 1020 on the frame 800, the rider can easily understand the current position of the chainring 400 during riding, thereby facilitating the rider to improve the efficiency and accuracy of adjusting the chainring 400.

[0094] In some embodiments, the electrically controlled moving crank mechanism further includes:

[0095] The position detection unit 1030 is electrically connected to the control module 1010 and is used to obtain the position of the crankset 400 on the central axis 200.

[0096] In this embodiment, the current position of the chainring 400 can be directly determined by setting the position detection unit 1030, which makes it easier for the control module 1010 to adaptively adjust the position of the chainring according to the current gear information of the freewheel 900. Usually, the chainring 400 will correspond as closely as possible to the gear corresponding to the current gear of the freewheel 900 in order to reduce the tilt angle of the chain.

[0097] The aforementioned position detection unit 1030 can be configured in various ways. For example, a laser radar mounted on the frame 800 can be used to detect the distance between the frame 800 and the chainring 400, and then the position of the chainring 400 on the bottom bracket 200 can be determined by simple addition and subtraction. Alternatively, other non-contact sensors such as ultrasonic sensors can be used to complete the detection. In addition, a displacement sensor can be used to directly detect the movement distance of the piston 102. There are various specific detection methods, and no specific limitation is made in this embodiment.

[0098] See Figure 3 As shown, one embodiment of this application provides a bicycle gear shifting system, including:

[0099] Such as the electrically controlled moving gear mechanism mentioned above;

[0100] The flywheel speed changer is connected to the control module 1010 and is used to adjust the gear position of the flywheel 900.

[0101] In this embodiment, the bicycle gear system includes the electronically controlled moving chainring mechanism as described above, and thus possesses the beneficial effects of the electronically controlled moving chainring mechanism as described above, which will not be repeated here.

[0102] In this embodiment, the bicycle gear system includes the electronically controlled moving chainring mechanism as described above, and thus possesses the beneficial effects of the electronically controlled moving chainring mechanism as described above, which will not be repeated here.

[0103] The aforementioned flywheel shifter can adjust the gear position of the flywheel 900, and can also feed back the current gear position information of the flywheel 900 to the control module 1010, so that the control module 1010 can adjust the position of the chainring according to the gear position information of the flywheel 900.

[0104] The aforementioned flywheel transmission device can be made using a commercially available, mature electronically controlled flywheel transmission adjustment mechanism.

[0105] Understandably, when the flywheel derailleur does not have a memory function, the control module 1010 can memorize the gear change state according to control commands to determine the current gear position of the flywheel 900. Furthermore, to reduce the impact of accumulated errors, after each stop of riding, the flywheel 900 can be controlled to return to a specific gear, such as the intermediate gear.

[0106] In some implementations, see Figure 3 The bicycle gear system also includes:

[0107] The torque detection unit 1040 is electrically connected to the control module 1010 and is used to detect the output torque of human stepping.

[0108] The cadence detection unit 1050 is electrically connected to the control module 1010 and is used to detect the cadence of a human pedaling the crank.

[0109] The torque detection unit 1040 mentioned above can be a torque sensor, stress sensor, etc., and can be installed on the crank, bottom bracket 200, etc. to detect the torque generated by the rider pressing the crank.

[0110] The aforementioned cadence detection unit 1050 can be a pressure sensor, angular velocity sensor, photoelectric sensor, contact sensor, etc., and can determine the rider's cadence by directly detecting the rotation frequency of structures such as the crank and chainring 400.

[0111] It should be noted that torque reflects the rider's effort level while riding; generally, the more effort is exerted, the greater the torque. Cadence directly reflects the rider's pedaling speed; generally, the faster the speed, the more effort is required. Based on the aforementioned principles, by combining the rider's torque and cadence, it is possible to effectively determine whether the rider is currently in a relatively strenuous state. When it is determined that the rider is exerting effort, the 900-speed flywheel is controlled to shift up a gear; when it is too easy, the 900-speed flywheel is controlled to shift down a gear. There are many ways to determine riding status using torque and cadence. For example, one can directly use the product of torque and cadence, and then use this product and a pre-set threshold or threshold range to determine whether the riding state is ideal. For instance, if the product is greater than the pre-set threshold or threshold range, one can shift up; if it is less than the pre-set threshold or threshold range, one can shift down. Of course, one can also introduce a weighting factor to perform a weighted calculation on torque and cadence, thereby obtaining a better calculated value for judging the pre-set threshold or threshold range in some scenarios (the aforementioned product can be understood as a calculated value). Then, the calculated value and the pre-set threshold or threshold range can be used to complete the judgment. There are many ways to use this method, and the user can choose the method according to their actual needs.

[0112] In some implementations, see Figure 3 The bicycle gear system also includes:

[0113] The human-machine interaction unit 1060 is communicatively connected to the control module 1010.

[0114] In this embodiment, taking into account the differences in individual physical fitness and the possibility that the bicycle may be used by multiple people, a human-computer interaction unit 1060 can be added to adjust the preset threshold or threshold range in order to better meet the usage needs of different cyclists.

[0115] It should be noted that, in the presence of other smart terminals, cyclists can also transmit instructions to the control module 1010 to modify the preset threshold or threshold range through other smart terminals, thereby completing the adjustment of the preset threshold or threshold range.

[0116] In some embodiments, the torque detection unit 1040 is disposed on the crank and / or chainring 400 and / or bottom bracket 200; and / or,

[0117] The cadence detection unit 1050 is mounted on the crank and / or chainring 400 and / or bottom bracket 200.

[0118] The torque detection unit 1040 can be installed on the crank, chainring 400, or bottom bracket 200. Theoretically, it can detect torque. Although the values ​​obtained by direct detection may be different depending on the location, they can all be preprocessed through simple mathematical operations to obtain the output torque that can represent the rider's pedaling force.

[0119] The torque detection unit 1040 may include multiple torque sensors. In this case, torque sensors can be set at multiple locations in the crank, chainring 400, and bottom bracket 200. After normalization, the mean value can be calculated to obtain the torque closest to the real value and eliminate the error caused by the acquisition of a single sensor.

[0120] The torque detection unit 1040 can be installed on the crank, chainring 400, or bottom bracket 200. Theoretically, it can detect torque. Although the values ​​obtained by direct detection will be different depending on the location, they can all be obtained by simple preprocessing to represent the torque generated by the rider pedaling.

[0121] The aforementioned cadence detection unit 1050 may include multiple cadence sensors. In this case, torque sensors can be set at multiple locations in the crank, chainring 400, and bottom bracket 200. After normalization processing, the mean value can be calculated to obtain the cadence closest to the true value and eliminate the error caused by the acquisition of a single sensor.

[0122] In some implementations, see Figure 3 The bicycle gear system also includes:

[0123] Lactic acid detection device 1070, communicatively connected to control module 1010, is used to detect lactic acid in the human body; and / or,

[0124] The heart rate detection device 1080 is communicatively connected to the control module 1010 and is used to detect human heart rate.

[0125] In this embodiment, considering that lactic acid and heart rate can effectively reflect the functional state of the human body, a lactic acid detection device 1070 is introduced to detect the cyclist's lactic acid, and a heart rate detection device 1080 is introduced to detect the heart rate. This allows for timely downshifting when lactic acid levels are high and heart rate is high, thus avoiding injury to the cyclist.

[0126] In addition, the lactate detected by the lactate detection device 1070 and / or the heart rate detected by the heart rate detection device 1080 can also be considered in combination with the aforementioned cadence and torque. For example, the gear control can be performed by using the product of the three or four, or by using the weighted calculation result of the three or four. The specific control method can refer to the aforementioned cadence and torque control method.

[0127] In some implementations, see Figure 3 The bicycle gear system also includes:

[0128] The blood pressure detection device 1090 is communicatively connected to the control module 1010 and is used to detect human blood pressure.

[0129] In this embodiment, considering that blood pressure can effectively reflect the functional state of the human body, a blood pressure detection device 1090 is introduced to detect the rider's blood pressure, so that when the blood pressure is too high, the gear can be downshifted in time to avoid injury to the rider.

[0130] In addition, the heart rate detected by the blood pressure monitoring device 1090 can also be considered in conjunction with the aforementioned cadence and torque. For example, the product of the three and the weighted sum of the three can be used to calculate the gear control. The specific control method can refer to the aforementioned cadence and torque control method.

[0131] It should be noted that lactate, heart rate, and blood pressure can be selectively combined with cadence and torque according to actual needs. You can choose one of them to combine with cadence and torque, or you can choose multiple parameters. When multiple parameters are selected, they can be comprehensively considered with the cadence and torque obtained above. For example, you can use the product of all selected parameters, or the weighted calculation result of all selected parameters, to control the gear. For specific control methods, please refer to the above-mentioned cadence and torque control methods.

[0132] In some implementations, the lactate detection device 1070, the heart rate detection device 1080, and the blood pressure detection device 1090 can all be installed on a smart wearable device, and the collected data can be transmitted to the control module 1010 via wireless communication through the smart wearable device.

[0133] The lactate detection device 1070, heart rate detection device 1080, and blood pressure detection device 1090 mentioned above can all be directly adopted from commercially available products.

[0134] In some implementations, the lactate detection device 1070, the heart rate detection device 1080, and the blood pressure detection device 1090 can be equipped with separate detection modules. These detection modules can be connected to the control module 1010 via data cables. When in use, the detection modules are installed on the cyclist, and when not in use, they can be hung on the bicycle.

[0135] This application also provides a bicycle that includes the electronically controlled moving chainring mechanism described above. Because the bicycle has the electronically controlled moving chainring mechanism, it possesses all the beneficial effects of such a mechanism.

[0136] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. An electrically controlled moving die plate mechanism, characterized by, include: A drive cylinder includes a cylinder body and a piston, the cylinder body being mounted on a vehicle frame and the piston being slidably mounted within the cylinder body; A central shaft is rotatably mounted inside the cylinder, with both ends of the central shaft extending out of the cylinder. A bushing is fitted onto the central shaft and can slide along the axial direction of the central shaft. The bushing and the central shaft are fixed relative to each other in the circumferential direction of the central shaft. The piston is detachably connected to the bushing. The toothed disc is connected to one end of the bushing; An electronically controlled drive mechanism is used to adjust the injection state of the medium entering the cylinder so that the piston moves axially along the central shaft and drives the bushing to move synchronously. The control module is electrically connected to the electronically controlled drive mechanism and is used to control the operation of the electronically controlled drive mechanism.

2. The electrically controlled moving die plate mechanism according to claim 1, wherein The inner peripheral wall of the cylinder is formed with a groove, and the groove and the outer peripheral wall of the bushing form a medium cavity. The piston is located in the medium cavity to divide the medium cavity along the axial direction of the central axis to form a first cavity and a second cavity. Both the first cavity and the second cavity are provided with a connecting hole, which is used to connect a medium delivery pipe.

3. The electrically controlled moving die plate mechanism according to claim 2, wherein The electronically controlled drive mechanism includes: The driving source is connected to the communication holes provided on the first cavity and the second cavity through the medium delivery pipe; A reversing valve is used to adjust the state of the medium injected by the drive source into the first chamber and the second chamber; both the reversing valve and the drive source are electrically connected to the control module.

4. The electrically controlled moving die plate mechanism according to claim 3, wherein The drive cylinder is configured as a hydraulic cylinder, and the drive source is configured as a servo hydraulic station.

5. The electrically controlled moving die plate mechanism according to claim 2, wherein The groove is annular and surrounds the bushing, and the piston is annular and surrounds the bushing.

6. The electrically controlled moving die plate mechanism according to claim 2, wherein The bushing has multiple grooves arranged circumferentially, and the piston has multiple pistons arranged circumferentially along the grooves.

7. The electrically controlled moving die plate mechanism according to claim 1, wherein The electrically controlled moving crank mechanism also includes: The position detection unit is electrically connected to the control module and is used to obtain the position of the dental disc on the central axis.

8. A bicycle derailleur system characterized by, include: The electrically controlled moving tooth plate mechanism as described in any one of claims 1 to 7; The flywheel speed changer is electrically connected to the control module and is used to adjust the flywheel's gear position.

9. The bicycle shifting system of claim 8, wherein, Also includes: The torque detection unit is electrically connected to the control module and is used to detect the output torque of human stepping. The cadence detection unit is electrically connected to the control module and is used to detect the cadence of a human pedaling the crank.

10. A bicycle characterized in that, Includes the electrically controlled moving tooth plate mechanism as described in any one of claims 1 to 7.

Images