Electric chainring apparatus, control method and apparatus, device, medium and bicycle
Patent Information
- Application Number
- PCT/CN2025/085694
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-12
- Filing Date
- 2025-03-28
- Publication Date
- 2026-09-17
Smart Images
Figure CN2025085694_17092026_PF_FP_ABST
Abstract
Description
Electric crankset, control method, device, equipment, medium and bicycle Technical Field
[0001] This application relates to the field of bicycles, and in particular to an electric crankset, control method, device, equipment, medium, and bicycle. Background Technology
[0002] In the current gearing system, when a rider operates a multi-speed bicycle to shift gears, the chain flexibly switches between different levels of freewheel sprockets. The angle between the chain and the chainring, and between the chain and the freewheel, also changes with the gear selection. The more this angle deviates from the ideal zero-degree state, the more axial force is generated by the chain's driving force due to the angle, significantly reducing the effective power driving the freewheel and thus significantly decreasing riding efficiency. Summary of the Invention
[0003] This application aims to provide an electric crankset device, control method, apparatus, equipment, medium, and bicycle that can improve the riding efficiency of cyclists.
[0004] The electric crankset according to a first aspect embodiment of this application includes:
[0005] The center axle is used for rotatable mounting to the chassis;
[0006] A bushing is fitted onto the central shaft and can move 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.
[0007] The toothed disc is disposed on the bushing;
[0008] A telescopic mechanism is located inside the central shaft and connected to the bushing and / or the toothed disc;
[0009] An electronically controlled drive unit is mounted on the vehicle frame and is used to drive the telescopic mechanism to operate, so that the telescopic mechanism can extend and retract to drive the bushing to move axially along the central shaft, and the bushing can rotate relative to the telescopic mechanism.
[0010] The electronic control module is electrically connected to the electronic control drive unit.
[0011] The bicycle according to a second aspect embodiment of this application includes an electric crankset as described in the first aspect embodiment.
[0012] A control method for an electric crankset according to a third aspect of this application is used to control an electric crankset as described in the first aspect embodiment, the control method comprising:
[0013] Get the current gear information of the bicycle flywheel;
[0014] Based on the current gear information, the electronically controlled drive unit is controlled to drive the chainring to move, thereby reducing the angle between the chain and the chainring.
[0015] An electric crankset control device according to a fourth aspect embodiment of this application is used to control an electric crankset as described in the first aspect embodiment, the electric crankset control device comprising:
[0016] The gear information acquisition module is used to acquire the current gear information of the bicycle flywheel;
[0017] The chainring adjustment module is used to control the electronically controlled drive unit to move the chainring according to the current gear information, so as to reduce the angle between the chain and the chainring.
[0018] According to the fifth aspect of this application, the electronic device includes: a processor and a memory storing computer program instructions;
[0019] When the processor executes computer program instructions, it implements the electric crankshaft control method as described in the third aspect embodiment above.
[0020] A computer-readable storage medium according to a sixth aspect of this application stores computer-executable instructions for performing an electric crankset control method as described in the third aspect of this application.
[0021] The electric chainring device, control method, apparatus, device, medium, and bicycle of this application embodiment, by setting a movable bushing on the bottom bracket and mounting the chainring on the bushing, allows the electric control module to control the electric control drive unit to drive the chainring to move along the bottom bracket. Ultimately, when the bicycle freewheel changes gears, the electric control drive unit can adaptively adjust the chainring to follow the gear changes, effectively reducing the angle between the chain and the chainring, thereby improving the cyclist's riding efficiency. Furthermore, the smaller angle allows for a wider engagement range between the chain and teeth, reducing chain slippage, asymmetrical wear on the teeth, and axial stress on the teeth, thus minimizing tooth deformation and extending service life.
[0022] 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
[0023] 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:
[0024] Figure 1 is a schematic diagram of the traditional chainring and freewheel connection;
[0025] Figure 2 is a schematic diagram of the fit between the chainring and the flywheel provided in an embodiment of this application;
[0026] Figure 3 is a schematic diagram of the overall structure of the electric crankshaft device provided in the embodiment of this application;
[0027] Figure 4 is a partial cross-sectional view of the electric crankshaft device provided in an embodiment of this application;
[0028] Figure 5 is an electrical system diagram of the electric crankshaft device provided in an embodiment of this application;
[0029] Figure 6 is a flowchart of the electric crankshaft control method provided in the embodiments of this application.
[0030] Reference numerals: Central shaft 100; Mounting cavity 101; Relief groove 102; Limiting protrusion 103; Bushing 200; Crankset 300; Telescopic mechanism 400; Connecting piece 401; First bearing 500; Axial locking structure 501; First locking plug 502; First sealing ring 503; Second bearing 600; Second locking plug 601; Second sealing ring 602; Assembly seat 700; Mounting hole 701; Relief cavity 702; Frame 800; First medium conveying pipe 900; Second medium conveying pipe 901; Electrically controlled drive unit 902; Rotary joint 903; Crank connecting shaft 1000; Flywheel 1100; Electrical control module 1201; Display unit 1202; Position detection unit 1203; Energy storage unit 1204; Wireless communication module 1205. Detailed Implementation
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] To better describe the electric chainring device and bicycle of this application embodiment, a brief description is given here of the change in the angle between the chain and the chainring 300 during the traditional bicycle gear adjustment process. Referring to Figure 1, when the chain is in the highest gear position of the freewheel 1100, that is, when the gear ratio is the highest, there is a large angle θ between the chain and the chainring 300. Because of the existence of angle θ, a large axial component of the chain's driving force cannot be used to drive the freewheel 1100 to rotate, resulting in energy waste. It can be understood that the larger the angle θ is, the more energy is wasted. However, this application embodiment reduces energy waste by reducing the angle θ, thereby improving riding efficiency. Referring to Figure 2, the dashed rectangle in Figure 2 can be understood as the position of the chainring 300 before movement, and the solid rectangle can be understood as the position of the chainring 300 after movement. After movement, the angle is β, and angle β is significantly smaller than angle θ, thereby effectively reducing the axial component of the force.
[0037] Based on the above scenario, the electric crankset device, control method, apparatus, device, medium, and bicycle of the present application embodiments are described below.
[0038] Referring to Figures 3 to 5, an embodiment of this application provides an electric crankset device, which includes:
[0039] The central shaft 100 is used for rotatable mounting on the frame 800;
[0040] A bushing 200 is sleeved on the central shaft 100 and can move along the axial direction of the central shaft 100. The bushing 200 and the central shaft 100 are relatively fixed in the circumferential direction of the central shaft 100.
[0041] The toothed plate 300 is disposed on the bushing 200;
[0042] The telescopic mechanism 400 is located inside the central shaft 100 and connected to the bushing 200 and / or the toothed disc 300;
[0043] An electronically controlled drive unit 902 is mounted on the frame 800 and is used to drive the telescopic mechanism 400 to operate, so that the telescopic mechanism 400 extends and retracts to drive the bushing 200 to move axially along the central shaft 100, and the bushing 200 can rotate relative to the telescopic mechanism 400.
[0044] The electronic control module 1201 is electrically connected to the electronic control drive unit 902.
[0045] In this embodiment, a movable bushing 200 is provided on the bottom bracket 100, and a chainring 300 is provided on the bushing 200. The electronic control module 1201 controls the electronic control drive unit 902 to drive the chainring 300 to move along the bottom bracket 100. Finally, when the bicycle freewheel 1100 changes gears, the electronic control drive unit 902 can adaptively adjust the chainring 300 to follow the gear changes, effectively reducing the angle between the chain and the chainring 300, thereby improving the cyclist's riding efficiency. Furthermore, the smaller angle allows for a wider meshing range between the chain and teeth, reducing chain slippage, asymmetrical wear on the teeth, and axial stress on the teeth, thus reducing tooth deformation and extending service life.
[0046] The aforementioned bottom bracket 100 can be mounted on the frame 800 via an assembly mount 700. Specifically, the assembly mount 700 can be equipped with a bearing system, and the bottom bracket 100 is mounted on the bearing system to enable the bottom bracket 100 to rotate. In addition, crank connecting shafts 1000 can be provided at both ends of the bottom bracket 100 for connecting cranks. The cranks are used to mount pedals, and the cyclist rotates the cranks by pedaling, thereby driving the bottom bracket 100 to rotate.
[0047] 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.
[0048] Furthermore, the length of the bushing 200 can be flexibly adjusted according to actual needs. For example, as shown in Figure 4, 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 remains outside the bearing system. It should be noted that both the short and long 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.
[0049] The aforementioned telescopic mechanism 400 is installed inside the bottom bracket 100. 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 the axial direction of the bottom bracket 100, or a slight offset relative to the axial direction 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.
[0050] The aforementioned electronically controlled drive unit 902 can drive the telescopic mechanism 400 to operate, thereby enabling the telescopic mechanism 400 to extend and retract, causing the bushing 200 and / or the chainring 300 to move, so as to adjust the relative position between the chainring 300 and the freewheel 1100, thereby adjusting the angle between the chain and the chainring 300.
[0051] The aforementioned electronically controlled drive unit 902 is controlled by the electronically controlled module 1201, that is, the electronically controlled drive unit 902 can be operated by the electronically controlled module 1201.
[0052] Specifically, the configuration of the electronically controlled drive unit 902 varies depending on the type of the telescopic mechanism 400. For example, if the telescopic mechanism 400 is a hydraulic cylinder, the electronically controlled drive unit 902 can be a hydraulic drive system, and the electronically controlled module 1201 drives the extension and retraction of the piston rod of the hydraulic cylinder by adjusting the injection of fluid into the rodless chamber and rod chamber of the hydraulic cylinder by the hydraulic drive system. If the telescopic mechanism 400 is a pneumatic cylinder, the electronically controlled drive unit 902 can be a pneumatic drive system, and the electronically controlled module 1201 adjusts the operation of the cylinder by adjusting the inflation state of the pneumatic drive system into the cylinder. If the telescopic mechanism 400 is an electric push rod, the electronically controlled drive unit 902 can be a power supply unit, and the electronically controlled module 1201 adjusts the extension and retraction 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 also only participate in power supply, and the electronically controlled module 1201 directly sends control signals to the electric push rod for extension and retraction control. The specific selection can be adjusted according to actual needs.
[0053] The aforementioned electronic control module 1201 can use electronic control devices, such as solenoid valves, electronic switches, etc., to achieve direct manual control of operation. At this time, the position that the drive shaft sleeve 200 can move to can be adjusted by the user based on the riding experience of the electronic control module 1201.
[0054] The aforementioned electronic control module 1201 can also directly achieve automatic adjustment of the position of the bushing 200, so that the chainring 300 is always in an optimal relative position with the freewheel 1100. For example, without a position detection function, the energizing duration of the electronic control drive unit 902 can be directly controlled to adjust the position of the chainring 300. For example, energizing for 1 second can move the chainring by the displacement corresponding to one gear. At the same time, in order to more accurately control the displacement of the chainring 300, the chainring 300 can be controlled to return to the zero position (e.g., the leftmost or rightmost end) after each use of the bicycle to avoid cumulative errors.
[0055] The drive mechanism composed of the aforementioned electronically controlled drive unit 902 and the telescopic mechanism 400 is an actively adjustable mechanism, which can also restrict the movement of the bushing 200. That is, the bushing 200 will not move passively due to the traction of the chain, thus improving the stability of riding.
[0056] In some embodiments, the electric crankset device further includes:
[0057] The display unit 1202 is mounted on the vehicle frame 800 and is electrically connected to the electronic control module 1201.
[0058] In this embodiment, by providing a display unit 1202 on the frame 800, the rider can easily understand the current position of the chainring 300 during riding, thereby facilitating the rider to improve the efficiency and accuracy of adjusting the chainring 300.
[0059] In some embodiments, the electric crankset device further includes:
[0060] The position detection unit 1203 is electrically connected to the electronic control module 1201 and is used to obtain the position of the toothed plate 300 on the central axis 100.
[0061] In this embodiment, the current position of the chainring 300 can be directly determined by setting the position detection unit 1203, which makes it easier for the electronic control module 1201 to adaptively adjust the position of the chainring 300 according to the current gear information of the freewheel 1100. Usually, the chainring 300 will correspond as closely as possible to the gear corresponding to the current gear of the freewheel 1100 to reduce the tilt angle of the chain.
[0062] The aforementioned position detection unit 1203 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 300, and then the position of the chainring 300 on the bottom bracket 100 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 extension distance of the telescopic end of the telescopic mechanism 400. There are various specific detection methods, and no specific limitation is made in this embodiment.
[0063] In some embodiments, the position detection unit 1203 includes a displacement sensor electrically connected to the electronic control module 1201, the displacement sensor being used to detect the extension distance of the telescopic end of the telescopic mechanism 400.
[0064] In this embodiment, a displacement sensor is used to directly detect the extension distance of the telescopic end of the telescopic mechanism 400, for example, the extension distance of the piston rod of the hydraulic cylinder or the lead screw of the electric push rod. This can effectively reduce the interference of external factors on the detection, improve the accuracy of the detection, and also effectively reduce the damage of external impacts to the position detection unit 1203.
[0065] In some embodiments, the electric crankset device further includes:
[0066] The energy storage unit 1204 is used to provide power to the electronically controlled drive unit 902 and the electronically controlled module 1201.
[0067] In this embodiment, the energy storage unit 1204 is directly used as the power source, such as a lithium battery or other storage battery, which can effectively improve the user experience, and the user no longer needs to connect an external power source for power supply.
[0068] In some implementations, the electronically controlled drive unit 902 and the electronically controlled module 1201 can be powered by a mobile power supply.
[0069] In some embodiments, the electric crankset device further includes:
[0070] The wireless communication module 1205 is electrically connected to the electronic control module 1201.
[0071] The aforementioned wireless communication module 1205 can achieve wireless communication with the outside world. For example, the current relative position of the chainring 300 can be transmitted to the outside world through the wireless communication module 1205. It can also upload the operating data collected by the other bicycle electronic control modules 1201 to the cloud for storage and recording, so as to provide users with more in-depth services in the future.
[0072] The wireless communication module 1205 mentioned above can be a Bluetooth, WIFI or other wireless communication module 1205. The specific choice can be made according to the actual needs.
[0073] In some embodiments, the electric crankset device further includes:
[0074] The assembly seat 700 is used to be installed on the frame 800. The assembly seat 700 is provided with a mounting hole 701. The central shaft 100 is rotatably installed in the mounting hole 701. A relief cavity 702 is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the central shaft 100. The relief cavity 702 allows the bushing 200 to extend into it.
[0075] The aforementioned assembly seat 700 may be detachably mounted on the frame 800. For example, the assembly seat 700 may be snapped onto the frame 800 or mounted on the frame 800 by fasteners. The assembly seat 700 has a horizontally extending mounting hole 701, with both ends of the mounting hole 701 extending through it. The bottom bracket 100 may be mounted within the mounting hole 701 via a bearing system to allow the bottom bracket 100 to rotate. The outer diameter of the bottom bracket 100 may be smaller than the diameter of the mounting hole 701 at the end near the chainring 300, so that a clearance cavity 702 is formed between the wall of the mounting hole 701 and the outer peripheral wall of the bottom bracket 100. The bushing 200 can be moved axially along the central shaft 100 to any position, with a portion of its structure extending into the relief cavity 702; alternatively, when the bushing 200 is moved to a partial position closer to the assembly seat 700, a portion of its structure extends into the relief cavity 702, and when the bushing 200 is moved to a partial position further away from the assembly seat 700, the entire bushing 200 is located outside one end of the assembly seat 700. The specific length of the bushing 200 can be flexibly adjusted according to actual needs, and will not be elaborated further here.
[0076] In this embodiment, the entire electric crankset can be configured as a single assembly, allowing for quick installation and replacement via the assembly base 700, providing a better user experience. Furthermore, compared to the bushing 200, which can only move back and forth at one end of the assembly base 700, in this application, a clearance cavity 702 is formed between the wall of the mounting hole 701 and the outer peripheral wall of the bottom bracket 100. The bushing 200 can extend into the clearance cavity 702, thus not only extending the movement path of the bushing 200 and allowing for a wider adjustment range of the crankset 300 along the axial direction of the bottom bracket 100, but also extending the bushing 200 further along the axial direction of the bottom bracket 100, resulting in higher structural strength and better installation stability, reducing crankset 300 wobble and further improving the riding experience.
[0077] Understandably, if the bushing 200 can only move back and forth outside one end of the assembly seat 700, not only is the movement path of the bushing 200 short, but also, since the distance between the end of the bottom bracket 100 and the assembly seat 700 is fixed, in order for the bushing 200 to move a certain displacement along the axial direction of the bottom bracket 100, the length of the bushing 200 can only be set to be short. Thus, not only is the structural strength low, but the stability is also poor, and the chainring 300 is prone to shaking, affecting the riding experience. In this application, a relief cavity 702 for the bushing 200 to extend into is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the bottom bracket 100, which can effectively solve the above problems.
[0078] In some embodiments, as shown in FIG4, the crankcase 300 can be installed on the end of the bushing 200 away from the assembly seat 700. When the bushing 200 moves to any position along the axial direction of the central shaft 100, the end of the bushing 200 away from the crankcase 300 is always located in the relief cavity 702.
[0079] In this embodiment, this configuration not only makes the bushing 200 extend longer along the axial direction of the central shaft 100, thus making the bushing 200 structurally stronger, but also improves the installation stability of the bushing 200, reducing the shaking of the chainring 300 and further improving the riding experience. In addition, it can also avoid interference between the bushing 200 and the assembly seat 700 when the bushing 200 enters the clearance cavity 702, thus making the movement of the bushing 200 smoother.
[0080] In some embodiments, the electric crankset device further includes:
[0081] The first bearing 500 is installed at the end of the mounting hole 701 that is away from the toothed plate 300;
[0082] The second bearing 600 is installed in the mounting hole 701 at one end near the toothed plate 300;
[0083] The central shaft 100 is rotatably mounted within the first bearing 500 and the second bearing 600.
[0084] In this embodiment, the rotation setting of the central shaft 100 can be achieved by using the first bearing 500 and the second bearing 600, which satisfies the rotation requirements of the central shaft 100 and makes the rotation of the central shaft 100 smoother.
[0085] In some embodiments, as shown in FIG4, a limiting protrusion 103 is provided on the outer peripheral wall of the central shaft 100, on the side of the first bearing 500 near the bushing 200, to provide a directional restriction. Simultaneously, an axial locking structure 501 is provided on the outer peripheral wall of the central shaft 100, on the side of the first bearing 500 away from the bushing 200, thereby restricting the first bearing 500 in another direction and also restricting the axial movement of the central shaft 100. For example, the axial locking structure 501 can be an axial locking nut, and the outer peripheral wall of the end of the central shaft 100 away from the bushing 200 can be provided with external threads, with the axial locking nut threadedly connected to the central shaft 100. Alternatively, the axial locking structure 501 can be a locking ring, and the outer peripheral wall of the end of the central shaft 100 away from the bushing 200 can be provided with a retaining ring, with the axial lock engaged within the retaining ring.
[0086] In some embodiments, as shown in FIG4, a first locking plug 502 is provided on the assembly seat 700 or the frame 800 on the side of the first bearing 500 away from the bushing 200. The first locking plug 502 is located on the outer periphery of the axial locking structure 501 to fix the first bearing 500. On the assembly seat 700 or the frame 800, a second locking plug 601 can be provided on the side of the second bearing 600 away from the first bearing 500. The second locking plug 601 can be located on the outer side of the bushing 200 to fix the second bearing 600.
[0087] It should be noted that when there is a gap between the first locking screw plug 502 and the axial locking structure 501, a first sealing ring 503 can be provided between the first locking screw plug 502 and the axial locking structure 501. When there is a gap between the second locking screw plug 601 and the bushing 200, a second sealing ring 602 can be provided between the second locking screw plug 601 and the bushing 200.
[0088] In some implementations, the first bearing 500 may be a ball bearing.
[0089] In this embodiment, the ball bearing has a strong axial bearing capacity, which can better withstand the axial force when the crank 300 moves. In addition, the ball bearing can better fix the central shaft 100.
[0090] It should be noted that the first bearing 500 can also be other suitable types of bearings, which will not be elaborated here.
[0091] In some embodiments, the second bearing 600 is configured as a needle roller bearing and is sleeved on the outside of the bushing 200, the bushing 200 being movable relative to the second bearing 600 along the axial direction of the central shaft 100.
[0092] The second bearing 600 mentioned above can be a needle roller bearing without an inner ring, and the end of the bushing 200 away from the gear plate 300 can extend into the second bearing 600 as the inner ring of the second bearing 600.
[0093] In this embodiment, the bushing 200 extends into the second bearing 600 and can rotate relative to the second bearing 600, thereby reducing the circumferential friction force on the outer peripheral wall of the bushing 200, making the rotation of the bushing 200 smoother, and thus improving riding efficiency. In addition, since the second bearing 600 is a needle roller bearing, the bushing 200 can move axially relative to the second bearing 600 along the central shaft 100, thereby reducing the axial friction force on the outer peripheral wall of the bushing 200, making the axial movement of the bushing 200 along the central shaft 100 smoother, and making the shifting of the chainring 300 smoother. Furthermore, the bushing 200 can also support the second bearing 600, making the installation of the second bearing 600 more stable.
[0094] It should be noted that the second bearing 600 can also be other suitable types of bearings, which will not be elaborated here.
[0095] In some embodiments, the central shaft 100 is provided with a mounting cavity 101, the telescopic mechanism 400 is installed in the mounting cavity 101, the outer peripheral wall of the central shaft 100 is provided with a relief groove 102 communicating with the mounting cavity 101, the telescopic mechanism 400 is provided with a connector 401, the connector 401 passes through the relief groove 102 and is connected to the bushing 200 and / or the toothed plate 300.
[0096] The aforementioned mounting cavity 101 can extend along the axial direction of the central shaft 100. Taking the telescopic mechanism 400 as a hydraulic cylinder as an example, the mounting cavity 101 can be divided into two parts, including a first chamber and a second chamber. The first chamber can be located away from the gear plate 300, and the second chamber can be located close to the gear plate 300. The cylinder body of the hydraulic cylinder can be installed in the first chamber, and the piston rod and connecting parts 401 of the hydraulic cylinder can be accommodated in the second chamber.
[0097] A clearance groove 102 is provided on the outer peripheral wall of the central shaft 100 near the bushing 200. The clearance groove 102 is connected to the mounting cavity 101. The clearance groove 102 can be elongated, with its length aligned with the axial direction of the central shaft 100, so that the connecting member 401 can connect with the bushing 200 and / or the gear plate 300. It also guides the connecting member 401, allowing it to slide along the axial direction of the central shaft 100. Furthermore, the clearance groove 102 effectively prevents relative rotation between the bushing 200 and the central shaft 100.
[0098] Multiple clearance grooves 102 can be formed on the outer peripheral wall of the central shaft 100 near the bushing 200. Providing multiple clearance grooves 102 can increase the connection stability between the connector 401 and the bushing 200 and / or the gear setter 300. As shown in Figure 4, the central shaft 100 has two clearance grooves 102, and the upper and lower parts of the inner wall of the bushing 200 are connected to the connector 401 through the clearance grooves 102.
[0099] In this embodiment, the mounting cavity 101 not only protects the telescopic mechanism 400 from being exposed and damaged, but also makes the telescopic mechanism 400 closer to the axis of the central shaft 100, resulting in less centrifugal force and less resistance to the rotation of the central shaft 100, making the rotation of the central shaft 100 smoother and further improving the riding efficiency of the cyclist.
[0100] In some embodiments, the telescopic mechanism 400 is configured as a hydraulic cylinder or a pneumatic cylinder, and the electric crankset device further includes:
[0101] The first medium delivery pipe 900 is connected to the telescopic mechanism 400;
[0102] The second medium delivery pipe 901 is rotatably connected to the first medium delivery pipe 900, and the second medium delivery pipe 901 is used to connect to the electronic control drive unit 902.
[0103] The aforementioned telescopic mechanism 400 is a hydraulic cylinder or a pneumatic cylinder, which has a simple structure, is easy to install, and has a good telescopic effect.
[0104] It should be noted that the telescopic mechanism 400 can also be other structures, such as an electric actuator, which will not be elaborated here.
[0105] Taking the telescopic mechanism 400 as an example of a hydraulic cylinder, the frame 800 can also be equipped with an electronically controlled drive unit 902 consisting of an oil pump, an oil pipe, an oil tank, a solenoid valve, and other structures. The oil pump is located between the oil tank and the oil cylinder via the oil pipe. By injecting or withdrawing oil into the rodless chamber of the oil cylinder and injecting or withdrawing oil into the rod chamber of the oil cylinder, the oil pump can control the sliding of the piston rod, thereby achieving telescopic movement.
[0106] The aforementioned electronically controlled drive unit 902 can be mounted on the frame 800 or the assembly base 700. When the telescopic mechanism 400 is configured as a hydraulic cylinder, the electronically controlled drive unit 902 may include a hydraulic pump. A liquid storage tank may also be provided on the frame 800 or the assembly base 700. When the telescopic mechanism 400 is configured as a pneumatic cylinder, the electronically controlled drive unit 902 may be an air pump. The telescopic mechanism 400 has a rodless chamber and a rod chamber. There may be two first medium delivery pipes 900, which are respectively connected to the rodless chamber and the rod chamber. There may be two second medium delivery pipes 901, both located outside the central shaft 100. The two second medium delivery pipes 901 are rotatably connected to the two first medium delivery pipes 900, and the ends of the two second medium delivery pipes 901 that are away from the first medium delivery pipes 900 are connected to the electronically controlled drive unit 902.
[0107] In this embodiment, the electronically controlled drive unit 902 injects or extracts driving media such as oil into the rodless cavity of the telescopic mechanism 400 via the first medium delivery pipe 900 and the second medium delivery pipe 901, and injects or extracts driving media such as oil into the rod cavity of the telescopic mechanism 400, thereby controlling the sliding of the piston rod and realizing the extension and retraction of the telescopic mechanism 400. This design is simple in structure and convenient in operation. Furthermore, the second medium delivery pipe 901 is rotatably connected to the first medium delivery pipe 900, thus preventing interference between the two pipes when the first medium delivery pipe 900 rotates with the central shaft 100, resulting in better connectivity between them.
[0108] In some embodiments, the electric crankset device further includes:
[0109] Assembly seat 700 is used for mounting on the frame 800. Assembly seat 700 is provided with mounting hole 701. The central shaft 100 is rotatably mounted in the mounting hole 701. The first medium conveying pipe 900 is provided in the central shaft 100. The second medium conveying pipe 901 is provided in the assembly seat 700. A rotary joint 903 is sleeved on the outer side of the central shaft 100. The first medium conveying pipe 900 is connected to the second medium conveying pipe 901 through the rotary joint 903.
[0110] The first medium delivery pipe 900 can be inserted through the central shaft 100, the second medium delivery pipe 901 can be inserted through the assembly seat 700, the rotary joint 903 can be annular, the rotary joint 903 can include an inner sleeve and an outer sleeve, the inner sleeve and the outer sleeve can rotate relative to each other, and an annular channel is formed between the inner sleeve and the outer sleeve. The inner sleeve can be fixedly connected to the central shaft 100 and connected to the first medium delivery pipe 900, and the outer sleeve can be fixedly connected to the assembly seat 700 and connected to the second medium delivery pipe 901. Both the first medium delivery pipe 900 and the second medium delivery pipe 901 are connected to the annular channel.
[0111] In this embodiment, the first medium conveying pipe 900 and the second medium conveying pipe 901 can be connected through the annular channel of the rotary joint 903. Moreover, since the inner and outer sleeves of the rotary joint 903 can rotate relative to each other, the second medium conveying pipe 901 and the first medium conveying pipe 900 can be rotatably connected. The structure is simple, the sealing performance is good, and the second medium conveying pipe 901 and the first medium conveying pipe 901 can be connected when the central shaft 100 is rotated to any angle, which makes it more practical.
[0112] It should be noted that in some embodiments, the second medium delivery pipe 901 and the first medium delivery pipe 900 can also be rotatably connected in other ways. For example, an annular groove can be provided on the outer peripheral wall of the central shaft 100, surrounding the central shaft 100 circumferentially. The wall of the mounting hole 701 of the assembly seat 700 covers the annular groove to form an annular channel. Both the first medium delivery pipe 900 and the second medium delivery pipe 901 communicate with the annular channel, thus achieving a rotatable connection between the second medium delivery pipe 901 and the first medium delivery pipe 900. Alternatively, the wall of the mounting hole 701 of the assembly seat 700 can be provided with an annular groove, surrounding the central shaft 100 circumferentially. The outer peripheral wall of the central shaft 100 covers the annular groove to form an annular channel. Both the first medium delivery pipe 901 and the second medium delivery pipe 901 communicate with the annular channel, similarly achieving a rotatable connection between the second medium delivery pipe 901 and the first medium delivery pipe 900. Alternatively, the outer peripheral wall of the central shaft 100 and the hole wall of the mounting hole 701 of the assembly seat 700 may both be provided with annular grooves, and the two annular grooves may be joined to form an annular channel. The first medium conveying pipe 900 and the second medium conveying pipe 901 are both connected to the annular channel, which can also realize the rotational connection between the second medium conveying pipe 901 and the first medium conveying pipe 900.
[0113] It is understandable that the first medium conveying pipe 900 can be directly inserted into the central shaft 100, and the second medium conveying pipe 901 can be directly inserted into the assembly seat 700. Alternatively, a first medium conveying channel can be opened on the central shaft 100, with the first medium conveying channel serving as part of the structure of the first medium conveying pipe 900, and a second medium conveying channel can be opened on the assembly seat 700, with the second medium conveying channel serving as part of the structure of the second medium conveying pipe 901.
[0114] In some embodiments, the length of the bushing 200 along its own axial direction is 1.2 to 3 times the travel of the bushing 200.
[0115] The length of the bushing 200 along its own axial direction is 1.2 to 3 times the travel of the bushing 200. For example, the length of the bushing 200 along its own axial direction can be 1.2, 2, 2.5, 3 times, or other suitable multiples of the travel of the bushing 200. This not only avoids the bushing 200 being too long, resulting in a too low travel and thus affecting the shifting effect of the gearbox 300, but also avoids the bushing 200 being too short, resulting in a decrease in structural strength and unstable installation.
[0116] In some embodiments, as shown in FIG4, a key structure is installed between the central shaft 100 and the bushing 200, and the key structure restricts the relative rotation of the central shaft 100 and the bushing 200. For example, both the outer peripheral wall of the central shaft 100 and the inner peripheral wall of the bushing 200 may be provided with keyways, the keyways extending along the axial direction of the central shaft 100, and the key structure is installed in both keyways and can slide relative to the keyways along the axial direction of the central shaft 100. Alternatively, one of the outer peripheral wall of the central shaft 100 and the inner peripheral wall of the bushing 200 may be provided with a keyway, the keyway extending along the axial direction of the central shaft 100, and the key structure is installed in the other and extends into the keyway, the key structure being able to slide relative to the keyway along the axial direction of the central shaft 100.
[0117] In this embodiment, the key structure can restrict the relative rotation between the central shaft 100 and the bushing 200, thereby enabling the central shaft 100 to drive the toothed disc 300 on the bushing 200 to rotate.
[0118] This application also provides a bicycle that includes the electric chainring device as described above. Because the bicycle has the electric chainring device, it possesses all the beneficial effects of such a device.
[0119] Referring to Figure 5, which is a flowchart of an electric crank device control method provided in an embodiment of this application, the electric crank device control method is used to control the electric crank device described above, including steps S100 to S200.
[0120] Step S100: Obtain the current gear information of the bicycle flywheel 1100;
[0121] In step S200, based on the current gear information, the electronic control drive unit 902 is controlled to drive the chainring 300 to move, so as to reduce the angle between the chain and the chainring 300.
[0122] The electric crankset control method in this application embodiment can be applied to the electronic control module 1201.
[0123] The electric crankcase control method in this application embodiment is based on the electric crankcase described above, which has been described in detail above and will not be repeated here.
[0124] During use, the aforementioned bicycle freewheel 1100 will shift gears, that is, adjust the chain to the gears corresponding to different gear levels on the freewheel 1100. The gear level on the freewheel 1100 that the user is currently using can be understood as the current gear information.
[0125] The current gear information can be obtained by setting the position detection unit 1203 in the gear shifting mechanism. The specific detection setting method has been described above and will not be repeated here.
[0126] Once the current gear information is obtained, it can be determined how the chainring 300 needs to be adjusted. Then, the chainring 300 can be moved by adjusting the electronic control drive unit 902 to reduce the angle between the chain and the chainring 300, and to make the angle between the chainring 300 and the chain as close to zero as possible.
[0127] In some implementations, based on the current gear information, the electronically controlled drive unit 902 is controlled to drive the chainring 300 to move, including:
[0128] Determine the target position of the chainring 300 corresponding to the current gear position information. The gear position information of the bicycle freewheel 1100 is different depending on the relative position of the chainring 300 and the bottom bracket 100.
[0129] The electronic control drive unit 902 drives the crankcase 300 to move, so that the crankcase 300 moves to the target position.
[0130] The crankset 300 corresponds to different gear positions depending on its location. Therefore, after determining the current gear position, the target position of the crankset 300 can be determined by identifying the corresponding position of the crankset 300. Once the target position of the crankset 300 is determined, the crankset 300 can be moved to the target position by controlling the electronic drive unit 902.
[0131] In some implementations, the gear information corresponding to each gear of the bicycle flywheel 1100 corresponds to a different relative position.
[0132] In this embodiment, different relative positions of the chainring 300 and the bottom bracket 100 are set for each gear of the bicycle freewheel 1100 corresponding to the gear information, so that the chainring 300 can better correspond to the gear of the freewheel 1100 corresponding to the current gear information, thereby reducing the angle between the chainring 300 and the chain and reducing the axial force.
[0133] When determining the relative position of the chainring 300 corresponding to each gear of the aforementioned bicycle freewheel 1100, it can be assumed that the chain is attached to that gear. If alignment between the chainring 300 and that gear is required, the relative position of the chainring 300 can be determined. It should be noted that if the movement range of the chainring 300 is restricted, and if alignment between the chainring 300 and the freewheel 1100 is not possible, then the position that minimizes the angle between the chainring 300 and the chain can be chosen as the relative position.
[0134] In some implementations, a single chainring 300 position may correspond to multiple gears of the bicycle freewheel 1100. In this way, the frequency and time of chainring 300 movement can be reduced, the battery life of the energy storage unit 1204 can be improved, and the control difficulty can be reduced.
[0135] Specifically, three relative positions can be set, such as the left limit position, the middle position, and the right limit position. The number of gears on the cassette 1100 can be divided into four parts. If it is divisible by 4, the two middle parts are matched with the middle position of the chainring 300, and the two sides are matched with the left and right limit positions of the chainring 300 respectively. If it is not divisible by 4, the remainder after dividing by 4 is added to the middle position, so that the number of gears participating in the shifting at the middle position is more than the remainder.
[0136] The electric crankcase control method provided in this application can be executed by an electric crankcase control device. This application uses an electric crankcase control device executing the electric crankcase control method as an example to illustrate the electric crankcase control device provided in this application.
[0137] This application embodiment also provides an electric crankset control device, which includes:
[0138] The gear information acquisition module is used to acquire the current gear information of the bicycle flywheel 1100;
[0139] The chainring 300 adjustment module is used to control the electronic drive unit 902 to move the chainring 300 according to the current gear information, so as to reduce the angle between the chain and the chainring 300.
[0140] The electric crankset control device in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device, augmented reality (AR) / virtual reality (VR) device, robot, wearable device, super mobile personal computer, netbook, or personal digital assistant, etc. It can also be a server, network attached storage, personal computer, television set, ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific implementation.
[0141] This application also provides an electronic device, including: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the electric crankset control method as described above. The source table provided in this application can implement each process of the above-described electric crankset control method embodiment and achieve the same beneficial effects; to avoid repetition, it will not be described again here.
[0142] This application also provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or control module, causing the processor to perform the electric crankset control method described in the above embodiments, for example, the method described above.
[0143] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.
[0144] The functional blocks shown in the above structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM, floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.
[0145] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.
[0146] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus, and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.
[0147] 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 powered toothset device, characterized by, The electric toothed disc device comprises: a middle shaft for rotationally mounting on a frame; a shaft sleeve sleeved on the middle shaft and movable along the axial direction of the middle shaft, the shaft sleeve being fixed relative to the middle shaft in the circumferential direction of the middle shaft; a toothed disc arranged on the shaft sleeve; a telescopic mechanism arranged in the middle shaft and connected to the shaft sleeve and / or the toothed disc; an electric control driving unit arranged on the frame and configured to drive the telescopic mechanism to operate, so that the telescopic mechanism drives the shaft sleeve to move along the axial direction of the middle shaft, and the shaft sleeve is rotatable relative to the telescopic mechanism; an electric control module electrically connected to the electric control driving unit.
2. The electrically powered turntable device of claim 1, wherein, The electric toothed disc device further comprises: a display unit arranged on the frame and electrically connected to the electric control module.
3. The electrically powered turntable device of claim 1, wherein, The electric toothed disc device further comprises: a position detection unit electrically connected to the electric control module and configured to obtain the position of the toothed disc on the middle shaft.
4. The electrically powered turntable apparatus of claim 1, wherein, The telescopic mechanism is a hydraulic cylinder or a pneumatic cylinder, and the electric toothed disc device further comprises: a first medium conveying pipe connected to the telescopic mechanism; a second medium conveying pipe rotationally connected to the first medium conveying pipe, the second medium conveying pipe being configured to be connected to the electric control driving unit.
5. The electrically powered turntable device of claim 4, wherein, The electric toothed disc device further comprises: an assembly seat configured to be mounted on the frame, the assembly seat being provided with a mounting hole, the middle shaft being rotationally mounted in the mounting hole, the first medium conveying pipe being arranged in the middle shaft, the second medium conveying pipe being arranged in the assembly seat, the outer side of the middle shaft being sleeved with a rotary joint, and the first medium conveying pipe being connected to the second medium conveying pipe through the rotary joint.
6. A bicycle characterized in that, The electric toothed disc device comprises any one of the electric toothed disc devices according to claims 1 to 5.
7. A control method for an electric turntable device, characterized by comprising: The electric toothed disc device control method comprises: obtaining the current gear information of the bicycle freewheel; controlling the electric control driving unit to drive the toothed disc to move according to the current gear information, so as to reduce the included angle between the chain and the toothed disc.
8. An electric toothset apparatus control apparatus, characterized by comprising: The electric toothed disc device control apparatus comprises: a gear information obtaining module configured to obtain the current gear information of the bicycle freewheel; a toothed disc adjusting module configured to control the electric control driving unit to drive the toothed disc to move according to the current gear information of the bicycle freewheel, so as to reduce the included angle between the chain and the toothed disc.
9. An electronic device, comprising: The electronic device comprises a processor and a memory storing computer program instructions; The processor executes the computer program instructions to implement the electric toothed disc device control method according to claim 7.
10. A computer-readable storage medium, characterized in that: The computer readable storage medium stores computer executable instructions for causing a computer to execute the electric toothed disc device control method according to claim 7.