Electric control crankset structure and bicycle

Abstract

According to the electric control crankset structure and the bicycle, a movable shaft sleeve is arranged on a middle shaft, a crankset is arranged on the shaft sleeve, and then the shaft sleeve can be driven by an electric control driving unit to move along the middle shaft, so that the crankset can move along the middle shaft, and the included angle between a chain and the crankset is effectively reduced; therefore, the riding efficiency of a bicycle user is improved. In addition, due to the fact that the included angle is decreased, the meshing cut-in range of the chain and the teeth is wider, chain falling caused by returning can be reduced, asymmetric abrasion of the tooth parts is reduced, axial stress of the tooth parts is reduced, tooth deformation can be reduced, and the service life can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bicycles, in particular to an electric control tooth disc structure and a bicycle. BACKGROUND

[0002] In the transmission system of a variable speed bicycle, when the height difference of the freewheel tooth disc group changes, the meshing angle between the chain and the freewheel will produce an angle deviation. At this time, the driving force transmitted by the chain will produce a lateral component due to the deviation of the meshing angle from the ideal state, resulting in part of the power being unable to be used to drive the freewheel to rotate. This energy loss is proportional to the size of the meshing angle, the larger the angle, the more significant the power loss, which ultimately affects the riding efficiency of the rider. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide an electric control tooth disc structure and a bicycle, which can improve the riding efficiency of the user of the bicycle.

[0004] The electric control tooth disc structure according to the first aspect of the present application comprises:

[0005] A middle shaft for rotating installation on a frame;

[0006] A shaft sleeve sleeved on the middle shaft and movable along the axial direction of the middle shaft, the shaft sleeve and the middle shaft being relatively fixed in the circumferential direction of the middle shaft;

[0007] A tooth disc provided on the shaft sleeve;

[0008] A telescopic mechanism located on the outer side of the middle shaft and connected to the shaft sleeve and / or the tooth disc;

[0009] An electric control driving unit provided on the frame for driving the telescopic mechanism to rotate, so that the telescopic mechanism drives the shaft sleeve to move along the axial direction of the middle shaft, the shaft sleeve being rotatable relative to the telescopic mechanism;

[0010] An electric control module electrically connected to the electric control driving unit.

[0011] The bicycle according to the second aspect of the present application comprises the electric control tooth disc structure according to the first aspect.

[0012] The electric control sprocket structure and bicycle of the embodiment of the application can drive the shaft sleeve to move along the central shaft through the electric control driving unit, so that the sprocket can move along the central shaft, so as to effectively reduce the included angle between the chain and the sprocket, thereby improving the riding efficiency of the bicycle user. In addition, because the included angle is reduced, the meshing cutting range of the chain and the tooth is wider, the chain can be reduced, the asymmetric wear of the tooth part is reduced, the axial stress of the tooth part is reduced, the deformation of the tooth is reduced, and the service life is prolonged.

[0013] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 It is a schematic view of the cooperation of the traditional sprocket and the freewheel;

[0016] Figure 2 It is a schematic view of the cooperation of the sprocket and the freewheel of the present application;

[0017] Figure 3 It is a schematic view of the overall structure of the electric control sprocket structure of the present application;

[0018] Figure 4 It is a partial sectional view of the electric control sprocket structure of the present application;

[0019] Figure 5 It is an electrical system diagram of the electric control sprocket structure provided by the embodiment of the application.

[0020] Reference signs:

[0021] Central shaft 100; limiting protrusion 101;

[0022] Shaft sleeve 200;

[0023] Sprocket 300;

[0024] Telescopic mechanism 400;

[0025] First bearing 500; axial locking structure 501; first locking plug 502; first sealing ring 503;

[0026] Second bearing 600; second locking plug 601; second sealing ring 602;

[0027] Assembly seat 700; mounting hole 701; accommodation cavity 702;

[0028] frame 800;

[0029] third bearing 900;

[0030] crank connecting shaft 1000;

[0031] flywheel 1100;

[0032] electric control driving unit 1201; electric control module 1202; display unit 1203; position detection unit 1204; power storage unit 1205; wireless communication module 1206. DETAILED DESCRIPTION

[0033] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as limiting the present application.

[0034] In the description of the present application, if there is a description to the first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0035] In the description of the present application, it is to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc., is based on the orientation or position relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not to indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In the description of the present application, it is to be understood that, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0037] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0038] In order to better describe the electric control toothed disc structure and bicycle of the embodiments of the present application, the change of the angle between the chain and the toothed disc 300 in the traditional bicycle gear adjustment process is briefly described here. Referring to Figure 1When the chain is in the highest gear position on the cassette 1100, i.e., the highest gear ratio, there is a large angle θ between the chain and the chainring 300. Because of this angle θ, a large axial component of the chain's driving force cannot be used to drive the cassette 1100 to rotate, resulting in energy waste. Understandably, the larger the angle θ, the more energy is wasted. This embodiment reduces energy waste by lowering the angle θ, thereby improving riding efficiency. (Refer to...) Figure 2 , Figure 2 The dashed rectangle can be understood as the position of the crankset 300 before it moves, and the solid rectangle can be understood as the position of the crankset 300 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.

[0039] The following is for reference. Figure 3 and Figure 5 This invention describes the structure of an electronically controlled crankset and a bicycle according to embodiments of the present invention.

[0040] See Figures 3 to 5 As shown, an embodiment of this application provides an electronically controlled crankcase structure, which includes:

[0041] The central shaft 100 is used for rotatable mounting on the frame 800;

[0042] A bushing 200 is fitted onto a 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.

[0043] The toothed plate 300 is located on the bushing 200;

[0044] The telescopic mechanism 400 is located outside the central shaft 100 and is connected to the bushing 200 and / or the toothed disc 300.

[0045] An electronically controlled drive unit 1201 is mounted on the frame 800 and is used to drive the telescopic mechanism 400 to move, so that the telescopic mechanism 400 telescopic drive bushing 200 moves along the axial direction of the central shaft 100, and the bushing 200 can rotate relative to the telescopic mechanism 400.

[0046] The electronic control module 1202 is electrically connected to the electronic control drive unit 1201.

[0047] 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 bushing 200 can then be driven to move along the bottom bracket 100 by the electronically controlled drive unit 1201, thereby allowing the chainring 300 to move along the bottom bracket 100. This effectively reduces the angle between the chain and the chainring 300, thus improving the cycling efficiency of the cyclist. Furthermore, the smaller angle allows for a wider engagement range between the chain and the teeth, reducing chain slippage, asymmetrical wear on the teeth, and axial stress on the teeth, which helps reduce tooth deformation and extends service life.

[0048] 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.

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

[0050] Furthermore, the length of the bushing 200 can be flexibly adjusted according to actual needs, for example, Figure 4 As shown, when the design length is long, the bushing 200 can be extended between the central shaft 100 and the bearing system used to mount the central shaft 100. When the design length is short, it does not need to extend between the central shaft 100 and the bearing system used to mount the central shaft 100, and the entire bushing remains outside the bearing system. It should be noted that both the long and short bushing 200 have their advantages. When the demand for moving drive of the sprocket 300 is relatively small, a shorter bushing 200 can be considered.

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

[0052] The aforementioned electronically controlled drive unit 1201 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.

[0053] The aforementioned electronically controlled drive unit 1201 is controlled by the electronically controlled module 1202, that is, the electronically controlled drive unit 1201 can be operated by the electronically controlled module 1202.

[0054] Specifically, the configuration of the electronically controlled drive unit 1201 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 1201 can be a hydraulic drive system, and the electronically controlled module 1202 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 1201 can be a pneumatic drive system, and the electronically controlled module 1202 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 1201 can be a power supply unit, and the electronically controlled module 1202 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 1202 directly sends control signals to the electric push rod for extension and retraction control. The specific selection can be adjusted according to actual needs.

[0055] The aforementioned electronic control module 1202 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 1202.

[0056] The aforementioned electronic control module 1202 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 1201 can be directly controlled to complete the adjustment of the chainring 300 position. 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.

[0057] The drive mechanism composed of the aforementioned electronically controlled drive unit 1201 and 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.

[0058] In some embodiments, the electronically controlled crankset structure further includes:

[0059] The display unit 1203 is mounted on the frame 800 and is electrically connected to the electronic control module 1202.

[0060] In this embodiment, by providing a display unit 1203 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.

[0061] The aforementioned display unit 1203 can be directly installed on the handlebars of a bicycle.

[0062] In some embodiments, the electronically controlled crankset structure further includes:

[0063] The position detection unit 1204 is electrically connected to the electronic control module 1202 and is used to obtain the position of the crankset 300 on the central axis 100.

[0064] In this embodiment, the current position of the chainring 300 can be directly determined by setting the position detection unit 1204, which makes it easier for the electronic control module 1202 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 chainring corresponding to the current gear of the freewheel 1100 to reduce the tilt angle of the chain.

[0065] The aforementioned position detection unit 1204 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.

[0066] In some embodiments, the position detection unit 1204 includes a displacement sensor electrically connected to the electronic control module 1202, the displacement sensor being used to detect the extension distance of the telescopic end of the telescopic mechanism 400.

[0067] 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 1204.

[0068] In some embodiments, the electronically controlled crankset structure further includes:

[0069] The energy storage unit 1205 is used to provide power to the electronic control drive unit 1201 and the electronic control module 1202.

[0070] In this embodiment, the energy storage unit 1205 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.

[0071] In some implementations, the electronically controlled drive unit 1201 and the electronically controlled module 1202 can be powered by a mobile power supply.

[0072] In some embodiments, the electronically controlled crankset structure further includes:

[0073] The wireless communication module 1206 is electrically connected to the electronic control module 1202.

[0074] The aforementioned wireless communication module 1206 can achieve wireless communication with the outside world. For example, it can transmit the current relative position of the chainring 300 to the outside world through wireless communication. It can also upload the operating data collected by the other bicycle electronic control modules 1202 to the cloud for storage and recording, so as to provide users with more in-depth services in the future.

[0075] The aforementioned wireless communication module 1206 can be a Bluetooth, WIFI, or other wireless communication module 1206. The specific choice can be made according to actual needs.

[0076] In some embodiments, the telescopic mechanism 400 is provided with a plurality of components evenly arranged circumferentially along the bushing 200; and / or,

[0077] The telescopic mechanism 400 is at least one of a hydraulic cylinder, a pneumatic cylinder, or an electric actuator.

[0078] Taking the telescopic mechanism 400 as an example of a hydraulic cylinder, the cylinder body can be mounted on the assembly seat 700 or the frame 800. The piston rod of the cylinder can be connected to the bushing 200 and / or the crankshaft 300. The frame 800 can also be equipped with an electronically controlled drive unit 1201, which may include an oil pump, an oil supply pipe, and an oil tank. The oil pump is located between the oil tank and the cylinder via the oil supply pipe. By injecting or extracting oil into the rodless chamber of the cylinder and into the rod chamber of the cylinder, the oil pump can control the sliding of the piston rod, thereby achieving telescopic movement.

[0079] In this embodiment, the telescopic mechanism 400 is a hydraulic cylinder, a pneumatic cylinder, or an electric push rod, which has a simple structure, is easy to install, and has a good telescopic effect.

[0080] It should be noted that when there is only one telescopic mechanism 400, it can be one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. When there are multiple telescopic mechanisms 400, all of them can also be one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. In other words, different telescopic mechanisms 400 can be of different types.

[0081] In some embodiments, the electronically controlled crankset structure further includes:

[0082] The assembly seat 700 is used to be mounted on the frame 800. The assembly seat 700 is provided with a mounting hole 701. The central shaft 100 is rotatably mounted 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.

[0083] The aforementioned assembly mount 700 is used for mounting on the chassis 800, such as Figure 3 and Figure 4 As shown, the assembly seat 700 is provided with a mounting hole 701, and the central shaft 100 is rotatably mounted 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, and the relief cavity 702 is for the bushing 200 to extend into.

[0084] 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. The central shaft 100 may be mounted within the mounting hole 701 via a bearing system to allow the central shaft 100 to rotate. The outer diameter of the central shaft 100 is smaller than the diameter of the mounting hole 701, so that a clearance cavity 702 is formed between the wall of the mounting hole 701 and the outer peripheral wall of the central shaft 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.

[0085] In this embodiment, compared to the bushing 200 which can only move back and forth outside one end of the assembly seat 700, in this application, a relief cavity 702 is formed between the hole wall of the mounting hole 701 and the outer peripheral wall of the bottom bracket 100. The bushing 200 can extend into the relief cavity 702, which not only makes the movement path of the bushing 200 longer, thus making the adjustment range of the chainring 300 along the axial direction of the bottom bracket 100 larger, but also makes the bushing 200 extend further along the axial direction of the bottom bracket 100, thus making the structure of the bushing 200 stronger. At the same time, the installation stability of the bushing 200 is better, which can reduce the shaking of the chainring 300, thereby further improving the riding experience.

[0086] 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.

[0087] In some embodiments, the crankcase 300 can be mounted 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.

[0088] 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.

[0089] In some embodiments, the electronically controlled crankset structure further includes:

[0090] The first bearing 500 is installed at the end of the mounting hole 701 that is away from the toothed plate 300;

[0091] The second bearing 600 is installed in the mounting hole 701 at one end near the toothed plate 300;

[0092] The central shaft 100 is rotatably mounted within the first bearing 500 and the second bearing 600.

[0093] 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.

[0094] In some embodiments, a limiting protrusion 101 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 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.

[0095] In some implementations, such as Figure 4 As shown, on the assembly seat 700 or the frame 800, a first locking plug 502 is provided 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.

[0096] 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.

[0097] In some embodiments, the first bearing 500 may be a ball bearing. In this embodiment, the ball bearing's strong axial bearing capacity can better withstand the axial force when the crankset 300 moves, and the ball bearing can also better fix the central shaft 100.

[0098] It should be noted that the first bearing 500 can also be other suitable types of bearings, which will not be elaborated here.

[0099] In some embodiments, the second bearing 600 is configured as a needle roller bearing and is sleeved on the outside of the bushing 200, which is movable relative to the second bearing 600 along the axial direction of the central shaft 100.

[0100] 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.

[0101] 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 set as 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 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.

[0102] It should be noted that the second bearing 600 can also be other suitable types of bearings, which will not be elaborated here.

[0103] In some embodiments, the electronically controlled crankset structure further includes:

[0104] Assembly base 700 is used for mounting on frame 800, central axle 100 is rotatably mounted on assembly base 700, and telescopic mechanism 400 is located on assembly base 700.

[0105] In this embodiment, by setting the bottom bracket 100 and the telescopic mechanism 400 in the assembly base 700, the entire electronically controlled crankset structure can be set as an assembly structure. In this way, the entire electronically controlled crankset structure can be quickly installed and replaced through the assembly base 700, providing users with a better user experience.

[0106] In some embodiments, the electronically controlled crankset structure further includes:

[0107] The third bearing 900 is disposed on the bushing 200 and / or the toothed plate 300 and is coaxial with the bushing 200. The third bearing 900 is connected to the telescopic mechanism 400, and the bushing 200 rotates relative to the telescopic mechanism 400 through the third bearing 900.

[0108] The aforementioned third bearing 900 may include an inner ring and an outer ring that rotate relative to each other. One of the inner ring and the outer ring is fixedly connected to the bushing 200 and / or the gear sprocket 300, and the other is fixedly connected to the telescopic mechanism 400. The bushing 200 can rotate relative to the telescopic mechanism 400 by the relative rotation of the inner ring and the outer ring. The structure is simple, and the bushing 200 can rotate relative to the telescopic mechanism 400 when it rotates to any angle, which makes it more practical.

[0109] It should be noted that one of the inner ring and the outer ring can be fixedly connected to the bushing 200, fixedly connected to the crankcase 300, or fixedly connected to both the bushing 200 and the crankcase 300.

[0110] In some implementations, such as Figure 4 As shown, multiple telescopic mechanisms 400 are provided and are evenly arranged along the circumference of the bushing 200. For example, there can be three, four, or other suitable numbers of telescopic mechanisms 400, and the multiple telescopic mechanisms 400 are evenly arranged along the circumference of the bushing 200.

[0111] In this embodiment, the bushing 200 is configured such that when the bushing 200 is driven, the bushing 200 is subjected to more uniform force, which in turn makes the bushing 200 slide more smoothly.

[0112] 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.

[0113] The length of the bushing 200 along its own axial direction can be 1.2 times, 2 times, 2.5 times, 3 times, or other suitable multiples of the travel of the bushing 200. This not only avoids the bushing 200 being too long, which would result in a low travel of the bushing 200 and thus affect the shifting effect of the gear sprocket 300, but also avoids the bushing 200 being too short, which would result in a decrease in structural strength and unstable installation.

[0114] In some implementations, such asFigure 4 As shown, 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.

[0115] 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.

[0116] This utility model embodiment also provides a bicycle, which includes the above-described electronically controlled chainring structure.

[0117] The bicycle according to this utility model embodiment, by adopting the above-described electronically controlled chainring structure, not only improves the riding efficiency of the cyclist but also reduces issues such as chain slippage, asymmetrical wear of the teeth, and tooth deformation, thereby enhancing the cyclist's riding experience and extending the bicycle's lifespan. Furthermore, compared to the chain-driven chainring 300 movement during gear shifting using the freewheel 1100, this application actively drives the chainring 300 through the extension and retraction of the telescopic mechanism 400. This results in smoother and more precise chainring movement, reducing the occurrence of jamming, and ensuring that the chainring 300 remains stationary after reaching its designated position, thus improving riding stability. Additionally, the bushing 200 of this application can rotate circumferentially relative to the telescopic mechanism 400, thereby preventing interference between the bushing 200 and the telescopic mechanism 400 when the bushing 200 rotates with the bottom bracket 100.

[0118] It should be noted that since bicycles can adopt all the technical solutions of the above-mentioned electronic chainring structure, they have at least all the beneficial effects brought about by the above-mentioned technical solutions. These additional beneficial effects will not be elaborated here.

[0119] It is understood that other components and operations of the bicycle according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0120] 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 electronically controlled dental crank structure, characterized in that, include: The center axle is used for rotatable mounting to the chassis; 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. The toothed disc is disposed on the bushing; A telescopic mechanism is located outside the central shaft and connected to the bushing and / or the toothed disc; 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. The electronic control module is electrically connected to the electronic control drive unit.

2. The electronically controlled dental crank structure according to claim 1, characterized in that, The electronically controlled crankcase structure also includes: The display unit is mounted on the vehicle frame and is electrically connected to the electronic control module.

3. The electronically controlled dental crank structure according to claim 1, characterized in that, The electronically controlled crankcase structure also includes: The position detection unit is electrically connected to the electronic control module and is used to obtain the position of the dental disc on the central axis.

4. The electronically controlled dental crank structure according to claim 3, characterized in that, The position detection unit includes a displacement sensor electrically connected to the electronic control module, and the displacement sensor is used to detect the extension distance of the telescopic end of the telescopic mechanism.

5. The electronically controlled dental crank structure according to claim 1, characterized in that, The telescopic mechanism is provided in multiple forms and is evenly arranged along the circumference of the bushing; and / or, The telescopic mechanism is at least one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

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

7. The electronically controlled crankcase structure according to claim 6, characterized in that, The electronically controlled crankcase structure also includes: A first bearing is installed at the end of the mounting hole away from the toothed disc; The second bearing is installed at one end of the mounting hole near the toothed disc; The central shaft is rotatably mounted within the first bearing and the second bearing.

8. The electronically controlled crankset structure according to claim 1, characterized in that, The electronically controlled crankcase structure also includes: An assembly base is used to mount the vehicle frame, the central shaft is rotatably mounted on the assembly base, and the telescopic mechanism is located on the assembly base.

9. The electronically controlled dental crank structure according to claim 1, characterized in that, The electronically controlled crankcase structure also includes: A third bearing is disposed on the bushing and / or the toothed disc and is coaxial with the bushing. The third bearing is connected to the telescopic mechanism, and the bushing rotates relative to the telescopic mechanism through the third bearing.

10. A bicycle, characterized in that, Includes the electronically controlled dental chain structure as described in any one of claims 1 to 9.

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