Automatic internal gear hubs and bicycles

Abstract

The automatic internal transmission (100) includes a hub axle (10), an input mechanism (20), an output mechanism (30), a shift mechanism (40), and an automatic shift control mechanism (50). The shift mechanism (40) includes a first planetary gear train (41) and a second planetary gear train (42). The automatic shift control mechanism (50) includes a centrifugal block (501) and a clutch control unit (53). The centrifugal block (501) is connected to the output mechanism (30). The centrifugal block (501) is connected to the output mechanism (30) and is capable of rotating in a first direction relative to the output mechanism (30) to a first state to rotate the clutch control unit (53) and transmit driving force via the first planetary gear train (41), and the centrifugal block (501) is further capable of rotating in the first direction relative to the output mechanism (30) to a second state to further rotate the clutch control unit (53) and transmit driving force via the second planetary gear train (42). The bicycle includes a body and an automatic internal transmission (100).

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application filed with the China National Intellectual Property Administration on April 12, 2022, with the application number 202210380344.4 and the title of the invention being "Automatic Internal Gearshift and Bicycle", and all its contents are incorporated into this application by reference. The present invention relates to the technical field of bicycle internal gearshifts, and particularly to automatic internal gearshifts and bicycles.

Background Art

[0002] A bicycle is also called a cycle or a tricycle. After a person rides a bicycle, pedaling with the feet serves as the power, making it an environmentally friendly means of transportation. In modern society, bicycles have already become a preferred means of transportation and fitness for residents in various countries around the world, especially in developed countries. At the same time, the core of the global bicycle industry has also shifted from traditional mobility-aiding means of transportation to sports, mountain, and leisure types. In developed countries such as the United States, Europe, and Japan, bicycles have become ordinary sports, fitness, leisure, and entertainment products. Moreover, with the continuous development of technology, the emergence of bicycle internal gearshifts has made it increasingly convenient for cyclists to adjust the shift positions of bicycles.

[0003] Conventional internal gear hubs are broadly classified into components such as the hub shaft, input mechanism, output mechanism, gear shifting mechanism, and shift control mechanism. The input mechanism is used to connect to the freewheel of the rear wheel of a bicycle, so that when an internal gear hub is mounted on a bicycle, the input mechanism can rotate in conjunction with the freewheel. The output mechanism is usually the rear wheel hub, so that when an internal gear hub is mounted on a bicycle, the rotation of the output mechanism rotates the rear wheel in sync, enabling the bicycle to move. The gear shifting mechanism is provided between the input mechanism and the output mechanism and is a transmission member between the input mechanism and the output mechanism, used to rotate the output mechanism by transmitting the rotational power of the input mechanism to the output mechanism. Multiple power transmission paths can be provided in the gear shifting mechanism, and a shift control mechanism is used to control the gear shifting mechanism. Gear shifting on a bicycle is achieved by controlling the clutch between components in the gear shifting mechanism with a shift control mechanism, or by controlling the clutch between the gear shifting mechanism and the output mechanism with a shift control mechanism.

[0004] An automatic internal gear hub is a type of internal gear hub that employs an automatic shift control mechanism. This mechanism eliminates the need for the cyclist to perform extra manual adjustments, automatically shifting gears in response to changes in the bicycle's speed. An automatic shift control mechanism typically includes a centrifugal block and a clutch control unit. The centrifugal block is usually rotatably connected to the hub, and the clutch control unit is connected to the centrifugal block. Once the hub's rotational speed reaches a certain level, the centrifugal block is "thrown" outward by centrifugal force. This "thrown" causes the clutch control unit to rotate, connecting the components of the gear shift mechanism to each other, or connecting the gear shift mechanism and the output mechanism. This transmits the driving force of the input mechanism to the hub via the clutch control unit, thereby achieving automatic gear shifting.

[0005] In an automatic internal gear hub, if there are multiple shift positions, the automatic internal gear hub typically has multiple sets of centrifugal blocks and clutch control units, with each set of centrifugal blocks connected to a corresponding set of clutch control units.

[0006] However, in conventional automatic internal gear hubs, the centrifugal blocks and clutch control units that control different shift positions are independent of each other. Therefore, during the adjustment process, different centrifugal blocks are thrown out by centrifugal force, which in turn controls and rotates different clutch control units, thereby enabling adjustment between multiple shift positions. In use, the phenomenon of "skipping" occurs very easily. For example, if the centrifugal block for adjusting the medium-speed shift position has not yet been "thrown out," the centrifugal block for adjusting the high-speed shift position may have already been "thrown out." As a result, the automatic internal gear hub jumps directly from the low-speed shift position, bypassing the intermediate shift position, to reach another shift position, affecting the cyclist's cycling experience. [Overview of the project] [Problems that the invention aims to solve]

[0007] Conventional automatic internal gear hubs suffer from a technical problem where a phenomenon called "skipping" easily occurs during the gear shifting process, affecting the cyclist's cycling experience. The present invention provides an automatic internal gear hub that can effectively prevent the occurrence of this "skipping" phenomenon, thereby better ensuring the cyclist's cycling experience. [Means for solving the problem]

[0008] An automatic internal gear hub, comprising a hub shaft, an input mechanism, an output mechanism, a gear shift mechanism, and an automatic shift control mechanism, Both the input mechanism and the output mechanism are rotatably mounted on the hub shaft, and the input mechanism is used to provide driving force to rotate the output mechanism. The gear shifting mechanism is mounted on the hub shaft and is located between the input mechanism and the output mechanism. The aforementioned gear shifting mechanism includes at least a first planetary gear train and a second planetary gear train. The automatic shift control mechanism includes a centrifugal block and a clutch control unit, wherein the centrifugal block is rotatably connected to the output mechanism and the centrifugal block is connected to the clutch control unit. The centrifugal block can rotate the clutch control unit by rotating along a first direction relative to the output mechanism to a first state such that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the first planetary gear train. The centrifugal block can be further rotated to a second state along a first direction relative to the output mechanism, thereby further rotating the clutch control unit, so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the second planetary gear train.

[0009] Preferably, the clutch control unit includes a synchronous ring, a control sleeve, and a clutch controller, wherein the centrifugal block is connected to the synchronous ring, the control sleeve is connected to the synchronous ring, the clutch controller is located between the gear shift mechanism and the output mechanism, and the centrifugal block is capable of rotating the control sleeve by rotating the synchronous ring to control the clutch controller. In the first state, the control sleeve controls the clutch controller to couple the first planetary gear train to the output mechanism. In the second state, the control sleeve controls the clutch controller to couple the second planetary gear train to the output mechanism.

[0010] Preferably, the clutch controller includes a hub bush, a first click, and a second click, wherein the hub bush is connected to the output mechanism, and the first click and the second click are each rotatably connected to the hub bush. In the first state, the control sleeve controls the first click to connect the first click to the first planetary gear train. In the second state, the control sleeve controls the second click to connect the second click to the second planetary gear train.

[0011] Preferably, the first click and the second click are spaced apart from each other along the axial direction, and a first control groove and a second control groove are provided in the control sleeve, the first control groove penetrates the control sleeve radially and the first control groove is provided along the axial direction corresponding to the first click, the second control groove penetrates the control sleeve radially and the second control groove is provided along the axial direction corresponding to the second click, In the first state, the inner wall of the first control groove contacts and pushes down the first click, causing the first click to connect to the first planetary gear train through the first control groove. In the second state, the inner wall of the second control groove contacts and pushes down the second click, causing the second click to connect to the second planetary gear train through the second control groove.

[0012] Preferably, the synchronous ring includes a synchronous ring body, a centrifugal block connecting projection, and a control sleeve connecting projection, wherein the centrifugal block connecting projection is provided at one end of the synchronous ring body along the axial direction, and at least two centrifugal block connecting projections are provided, the centrifugal block is connected to the centrifugal block connecting projection, the control sleeve connecting projection is provided at the other end of the synchronous ring body along the axial direction, and the control sleeve is connected to the control sleeve connecting projection.

[0013] Preferably, further comprising a first elastic recovery member, The first elastic recovery member is connected to the output mechanism and is used to provide a first restoring force for the centrifugal block by its own elasticity so that the centrifugal block returns along the second direction and maintains its initial state. The second and first directions are two opposite directions.

[0014] Preferably, the first elasticity adjustment structure is further included, and the first elasticity recovery member is connected to the output mechanism via the first elasticity adjustment structure. The first elasticity adjustment structure includes a first adjustment member and a first drive member, wherein the first adjustment member is connected to the first elastic recovery member, the first drive member is connected to the output mechanism, and the first drive member is connected to the first adjustment member, and the first drive member can change the strain state of the first elastic recovery member by operating the first adjustment member to change the first restoring force received by the centrifugal block.

[0015] Preferably, the first adjusting member is rotatably connected to the output mechanism, the first elastic recovery member is a torsion spring, and the first driving member rotates the first adjusting member, thereby allowing the first elastic recovery member to twist.

[0016] Preferably, the first adjusting member is provided with a first gear, and the first driving member meshes with the first gear.

[0017] Preferably, the first drive member includes a first drive stud and a drive rack, the output mechanism has a first screw hole, the first drive stud is fitted correspondingly into the first screw hole, the drive rack meshes with the first gear, and the first drive stud can rotate the first adjustment member by moving the drive rack.

[0018] Preferably, the first drive member further includes a first return spring, the ends of which are connected to the drive rack and the output mechanism, respectively, and the first return spring is used to provide a restoring force for the drive rack by its own elasticity.

[0019] Preferably, the first drive member includes a rotating plate, a link, and a rotating plate drive lever. The rotating plate is rotatably connected to the output mechanism, and the rotating plate is connected to the first adjusting member via the link. The rotating plate drive lever is movably mounted on the output mechanism, and the rotating plate drive lever can rotate the rotating plate so that the link rotates the first adjusting member.

[0020] Preferably, the link is connected to one end of the rotating plate, and a turbine structure is provided at the other end of the rotating plate. The rotating plate drive lever includes a worm and a drive lever. The worm meshes with the turbine structure, the drive lever is connected to the worm, and the drive lever is movably mounted on the output mechanism. The drive lever can rotate the rotating plate by engaging the worm with the turbine structure by rotating the worm.

[0021] Preferably, a mounting hole is formed in the output mechanism. The drive lever is mounted in the mounting hole, and a sealing ring is mounted on the drive lever. The drive lever is interference-fitted with the hole wall of the mounting hole via the sealing ring.

[0022] Preferably, the rotating plate drive lever is a stud. A first threaded hole is formed in the output mechanism, and the rotating plate drive lever is correspondingly mounted at the position of the first threaded hole.

[0023] Preferably, both ends of the first elastic recovery member are respectively connected to the first adjusting member and the centrifugal block.

[0024] Preferably, it further includes a second elastic recovery member and a damping member. Both ends of the second elastic recovery member are connected to the damping member and the output mechanism, respectively. The damping member is used to prevent the centrifugal block from moving, and the damping member is used to provide a second restoring force to the centrifugal block by the elasticity of the second elastic recovery member so that the centrifugal block returns along the second direction and maintains the first state.

[0025] Preferably, the system further includes a second elasticity adjustment structure, the second elasticity recovery member being connected to the output mechanism via the second elasticity adjustment structure, The second elasticity adjustment structure includes a second adjustment member and a second drive member, the second adjustment member being connected to the second elastic recovery member, the second drive member being connected to the output mechanism, and the second drive member being connected to the second adjustment member, and the second drive member being able to change the strain state of the second elastic recovery member by operating the second adjustment member so as to change the second restoring force that the damping member provides to the centrifugal block.

[0026] Preferably, the second adjusting member is rotatably connected to the output mechanism, the second elastic recovery member is a torsion spring, and the second driving member can rotate the second adjusting member, thereby causing the second elastic recovery member to twist.

[0027] Preferably, the second adjusting member is provided with a second gear, and the second driving member meshes with the second gear.

[0028] Preferably, the second drive member includes a second drive stud and a second drive assembly, the output mechanism has a second screw hole, the second drive stud is fitted correspondingly into the second screw hole, the second drive assembly meshes with the second gear, and the first drive stud can rotate the second adjustment member by driving the second drive assembly.

[0029] Preferably, the second drive assembly includes an oscillating gear and an intermediate gear, the oscillating gear being rotatably connected to the output mechanism, the intermediate gear being rotatably connected to the output mechanism, and the intermediate gear meshing with the oscillating gear and the second gear respectively, and the second drive stud is capable of rotating the intermediate gear and the second adjusting member by oscillating the oscillating gear.

[0030] Preferably, the second drive member further includes a second recovery torsion spring, the ends of which are connected to the oscillating gear and the output mechanism, respectively, and the second recovery torsion spring is used to provide a restoring force for the oscillating gear by its own elasticity.

[0031] Preferably, the output mechanism includes a hub body and a mounting base, the mounting base being fixedly connected to the hub body, the first adjustment structure and the second adjustment structure both being connected to the mounting base, and the centrifugal block being rotatably connected to the mounting base.

[0032] Preferably, the mounting base has a slide groove having an opening at one end, and the slide groove extends along the rotational direction of the centrifugal block. The centrifugal block includes a centrifugal block body and a centrifugal block projection, the centrifugal block body being rotatably connected to the mounting base, the centrifugal block projection being connected to the centrifugal block body, the damping member being offset from the centrifugal block body along the axial direction, the centrifugal block projection being located in the slide groove, and after the centrifugal block rotates under centrifugal force, the centrifugal block projection is able to slide out from the opening and out of the slide groove. The damping member is positioned correspondingly at the opening and is used to block the centrifugal block projection.

[0033] Preferably, the mounting base further includes a damping member suction unit, the damping member suction unit being connected to the mounting base and located near the opening, and the damping member suction unit being used to suction the damping member so that the damping member is in its initial position.

[0034] Preferably, in the first state, the centrifugal block projection is located near the opening, and the damping member adsorption unit is further used to adsorb the centrifugal block projection.

[0035] Preferably, the system further includes a centrifugal block adsorption unit, the centrifugal block adsorption unit being connected to the output mechanism, and the centrifugal block adsorption unit being used to adsorb the centrifugal block such that the centrifugal block maintains the second state.

[0036] A bicycle comprising a frame and an automatic internal gear hub as described in any one of the above items, wherein the automatic internal gear hub is mounted on the drive wheel of the frame.

[0037] Compared to the prior art, the automatic internal gear hub provided by the present invention includes a hub shaft, an input mechanism, an output mechanism, a gear shift mechanism, and an automatic shift control mechanism, wherein both the input mechanism and the output mechanism are rotatably mounted on the hub shaft, and the input mechanism is used to provide driving force to rotate the output mechanism, the gear shift mechanism is mounted on the hub shaft and positioned between the input mechanism and the output mechanism, the gear shift mechanism includes at least a first planetary gear train and a second planetary gear train, and the automatic shift control mechanism includes a centrifugal block and a clutch control unit, the centrifugal block is rotatably connected to the output mechanism The centrifugal block is connected to the clutch control unit, and the centrifugal block can rotate the clutch control unit by rotating it to a first state along a first direction relative to the output mechanism so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the first planetary gear train, and the centrifugal block can further rotate the clutch control unit by rotating it to a second state along the first direction relative to the output mechanism so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the second planetary gear train. The automatic internal gear hub controls the clutch control unit via the centrifugal block so that it rotates at different angles in the same direction, thereby adjusting the shift position and preventing the phenomenon of "skipping" during the shift position adjustment process, thus better guaranteeing the cyclist's cycling experience. [Brief explanation of the drawing]

[0038] To more clearly illustrate the embodiments of this application or the technical concepts in the prior art, the following briefly introduces the drawings necessary for describing the embodiments or the prior art. Clearly, the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings in accordance with these, provided they do not perform work commensurate with inventive step. [Figure 1] This is a schematic diagram of the three-dimensional structure of an automatic internal gear hub provided by the embodiment. [Figure 2]Figure 1 is a schematic diagram of the cross-sectional structure of an automatic internal transmission. [Figure 3] Figure 1 is a schematic diagram of the three-dimensional structure of some components in an automatic internal transmission. [Figure 4] Figure 2 is a schematic cross-sectional view of some components of an automatic internal transmission. [Figure 5] Figure 4 is a schematic cross-sectional view of the first planetary gear train and clutch control unit from a different angle. [Figure 6] Figure 4 is a schematic cross-sectional view of the second planetary gear train and clutch control unit from a different angle. [Figure 7] Figure 5 is a schematic diagram of the three-dimensional structure of the control sleeve. [Figure 8] Figure 5 is a schematic diagram of the three-dimensional structure of the hub bush. [Figure 9] Figure 5 is a schematic diagram of the three-dimensional structure of the ring gear in the first planetary gear train. [Figure 10] Figure 5 is a schematic diagram of the three-dimensional structure of the first click. [Figure 11] Figure 2 is a schematic diagram of the three-dimensional structure of the aforementioned synchronization ring. [Figure 12] Figure 1 is a schematic plan view of some of the components in an automatic internal transmission. [Figure 13] Figure 1 is a schematic diagram of the three-dimensional structure of some components in an automatic internal transmission. [Figure 14] Figure 13 is a schematic plan view of the component shown. [Figure 15] Figure 13 is a schematic diagram of the three-dimensional structure of the first adjustment member. [Figure 16] Figure 1 is a schematic plan view of some of the components in an automatic internal transmission. [Figure 17] Figure 1 is a schematic diagram of the three-dimensional structure of some components in an automatic internal transmission. [Figure 18] Figure 1 is a schematic diagram illustrating the positional structure of some components of an automatic internal gear hub when it is in first gear. [Figure 19] Figure 1 is a schematic diagram illustrating the positional structure of some components of an automatic internal gear hub when it is in 2nd gear. [Figure 20] Figure 1 is a schematic diagram illustrating the positional structure of some components of an automatic internal gear hub when it is in 3rd gear. [Figure 21] Figure 16 is a schematic diagram of the three-dimensional structure of the second adjustment member. [Figure 22] Figure 16 is a schematic diagram of the three-dimensional structure of the damping member. [Figure 23] Figure 1 is a schematic diagram illustrating the positional structure of some components of an automatic internal gear hub when it is in 3rd gear. [Figure 24] This is a schematic cross-sectional view of some components in an automatic internal transmission provided by another embodiment. [Figure 25] Figure 24 is a schematic diagram of the three-dimensional structure of some components in an automatic internal transmission. [Figure 26] Figure 24 is a schematic diagram of the three-dimensional structure of a worm. [Figure 27] Figure 24 is a schematic diagram of the three-dimensional structure of the drive lever. [Figure 28] This is a schematic plan view of some components in an automatic internal transmission provided by another embodiment. [Figure 29] Figure 28 is a schematic diagram of the three-dimensional structure of some components in an automatic internal gear hub. [Modes for carrying out the invention]

[0039] To help those skilled in the art better understand the technical concepts presented in this application, the technical concepts in the embodiments of this application are described below clearly and completely. Clearly, the embodiments described are only a selection, and not all, of the embodiments of this application. All other embodiments that can be obtained based on the embodiments of this application, without any creative work by those skilled in the art, are all within the scope of protection of this application.

[0040] It should be noted that when a component is said to be "fixed," "attached," or "provided" to another component, it is possible that it is directly on the other component or indirectly provided to it. Similarly, when one component is said to be "connected" to another component, or when one component is said to be "connected" to another component, it is possible that it is directly connected to the other component or indirectly connected to the other component.

[0041] Furthermore, the structures, proportions, sizes, etc., shown in the drawings herein are solely for the purpose of enabling those skilled in the art to understand and interpret them in accordance with the content disclosed in the specification, and are not intended to limit the conditions under which this application may be implemented. Therefore, they have no substantive technical significance, and any modification of the structure, change in proportions, or adjustment of size is included within the scope of the technical content disclosed herein, as long as it does not affect the effects and objectives achieved by this application.

[0042] The present invention provides an automatic internal gear hub, comprising a hub shaft, an input mechanism, an output mechanism, a gear shift mechanism, and an automatic shift control mechanism, wherein both the input mechanism and the output mechanism are rotatably mounted on the hub shaft, and the input mechanism is used to provide driving force to rotate the output mechanism, the gear shift mechanism is mounted on the hub shaft and positioned between the input mechanism and the output mechanism, the gear shift mechanism comprises at least a first planetary gear train and a second planetary gear train, the automatic shift control mechanism comprises a centrifugal block and a clutch control unit, the centrifugal block is rotatably connected to the output mechanism, and The centrifugal block is connected to the clutch control unit, and the centrifugal block can rotate the clutch control unit by rotating to a first state along a first direction relative to the output mechanism so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the first planetary gear train, and the centrifugal block can further rotate the clutch control unit by rotating to a second state along the first direction relative to the output mechanism so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the second planetary gear train. The automatic internal gear hub does not exhibit the phenomenon of "skipping" during the shift position adjustment process, thereby better ensuring a cycling experience for cyclists.

[0043] Refer to Figures 1 to 23 in combination. This embodiment provides an automatic internal gear hub 100 for automatically shifting gears according to the vehicle speed during the vehicle's journey.

[0044] The automatic internal gear hub 100 includes a hub shaft 10, an input mechanism 20, an output mechanism 30, a gear shift mechanism 40, and an automatic shift control mechanism 50. Both the input mechanism 20 and the output mechanism 30 are rotatably mounted on the hub shaft 10. Specifically, the input mechanism 20 is mounted on the hub shaft 10 and is rotatable relative to the hub shaft 10, the output mechanism 30 is mounted on the hub shaft 10 and is rotatable relative to the hub shaft 10, and the hub shaft 10 is the pivot axis for the input mechanism 20 and the output mechanism 30. The input mechanism 20 is used to provide driving force to rotate the output mechanism 20. Specifically, the input mechanism 20 may be a freewheel, and the output mechanism 30 may be a hub. The input mechanism 20 is used to connect to the pedals on the bicycle via a chain, and the output mechanism 30 is used to connect to the drive wheels on the bicycle. When a cyclist rides the bicycle, they pedal, which rotates the input mechanism 20, and then inputs driving force to the automatic internal gear hub 100 via the input mechanism 20. This driving force is then output through the output mechanism 30 to rotate the drive wheels of the vehicle, thereby enabling the vehicle to move.

[0045] The gear shift mechanism 40 is mounted on the hub shaft 10 and is located between the input mechanism 20 and the output mechanism 30, and is used to transmit the driving force of the input mechanism 20 to the output mechanism 30. In other words, the gear shift mechanism 40 is provided between the input mechanism 20 and the output mechanism 30 and is used to transmit the driving force input from the input mechanism 20 to the output mechanism 30.

[0046] The transmission mechanism 40 includes at least a first planetary gear train 41 and a second planetary gear train 42. Specifically, in this embodiment, the automatic internal gear transmission 100 is a three-speed automatic internal gear transmission. In first gear, the driving force input from the input mechanism 20 is transmitted directly to the output mechanism 30 via the one-way clutch 21, that is, it directly rotates the output mechanism 30 via the input mechanism 20. In second gear, the driving force input from the input mechanism 20 is transmitted to the output mechanism 30 via the first planetary gear train 41. In third gear, the driving force input from the input mechanism 20 is transmitted to the output mechanism 30 via the second planetary gear train 42. Of course, in other embodiments, the automatic internal gear transmission 100 may further be an automatic internal gear transmission with any other gear, depending on the actual needs. In this embodiment, only the three-speed automatic internal gear transmission 100 will be described as an example.

[0047] The automatic shift control mechanism 50 includes a centrifugal block 501 and a clutch control unit 53, wherein the centrifugal block 501 is rotatably connected to the output mechanism 30 and the centrifugal block 501 is connected to the clutch control unit 53.

[0048] The centrifugal block 501 can rotate the clutch control unit 53 by rotating it to a first state along a first direction relative to the output mechanism 30, so that the driving force transmitted by the input mechanism 20 is transmitted to the output mechanism 30 via the first planetary gear train 41. That is, the centrifugal block 501, after receiving force, can rotate relative to the output mechanism 30, thereby rotating the clutch control unit 53, directly or indirectly coupling the clutch control unit 53 with the output mechanism 30 and the first planetary gear train 41. The driving force input from the input mechanism 20 is transmitted to the output mechanism 30 via the first planetary gear train 41, thereby changing the power transmission path in the automatic internal gear transmission 100 and enabling gear shifting in the automatic internal gear transmission 100.

[0049] The centrifugal block 501 can further rotate the clutch control unit 53 by rotating further along the first direction relative to the output mechanism 30, so that the driving force transmitted by the input mechanism 20 is transmitted to the output mechanism 30 via the second planetary gear train 42. That is, after receiving force, the centrifugal block 501 can further rotate relative to the output mechanism 30, thereby further rotating the clutch control unit 53, directly or indirectly coupling the clutch control unit 53 with the output mechanism 30 and the second planetary gear train 42. This allows the driving force input from the input mechanism 20 to be transmitted to the output mechanism 30 via the second planetary gear train 42, thereby changing the power transmission path in the automatic internal gear transmission 100 and enabling shift shifting in the automatic internal gear transmission 100. The first direction may be a clockwise or counterclockwise rotation direction. It should be noted that the first state and the second state refer to the state after the centrifugal block 501 has rotated from its initial position by two different angles in the same direction. That is, the first state is the state after the centrifugal block 501 has rotated by one angle from its initial position, and the second state is the state after the centrifugal block 501 has rotated by another angle in the same direction from its initial position. The angle required to rotate to the second state is greater than the angle required to rotate to the first state; that is, the first state must be reached before the second state can be reached.

[0050] Specifically, in this embodiment, the centrifugal block 501 is used to control the shift between 1st and 2nd gear, and between 2nd and 3rd gear. More specifically, when a part of the centrifugal block 501 is "thrown out" ("thrown out" means that after the centrifugal block receives centrifugal force, it rotates relative to the output mechanism 30 in a direction away from the hub shaft 10), the centrifugal block 501 is in the first state, and the automatic internal gear 100 can be shifted to 2nd gear. When the centrifugal block 501 is completely "thrown out", the centrifugal block 501 is in the second state, and the automatic internal gear 100 can be shifted to 3rd gear. That is, different shift position control conversions are achieved by "throwing out" the centrifugal block 501 to different degrees after receiving centrifugal force. Of course, in other embodiments, more shift positions can be controlled by different degrees of "throwing out" of the same type of centrifugal block 501. For example, if a part of the centrifugal block 501 is "thrown out", it can be controlled to shift into 2nd gear; if the centrifugal block 501 is "thrown out" further, it can be controlled to shift into 3rd gear; and if the centrifugal block 501 is "thrown out" even further, it can be controlled to shift into 4th gear. Specifically, the number of shift positions controlled by the centrifugal block 501 can be selected according to actual needs, and this embodiment will only describe, as an example, the centrifugal block 501 controlling the shift from 1st to 2nd gear and the shift from 2nd to 3rd gear.

[0051] During the process of riding the bicycle, after the rotational speed of the output mechanism 30 reaches a certain speed, the centrifugal block 501 is "thrown" outward by the action of centrifugal force. Since the clutch control unit 53 is connected to the centrifugal block 501, when the centrifugal block 501 is "thrown" outward, the clutch control unit 53 is rotated, the rotational state of the clutch control unit 53 is changed, and the components of the clutch control unit 53 are directly or indirectly connected to the output mechanism 30, thereby changing the power transmission path in the automatic internal gear hub 100 and enabling shifting of the automatic internal gear hub 100. The coupling member in the clutch control unit 53 may be provided between the gear shift mechanism 40 and the output mechanism 30, so that after the centrifugal block 501 rotates the clutch control unit 53 to a certain angle, the coupling member in the clutch control unit 53 connects the corresponding member in the gear shift mechanism 40 and the corresponding member in the output mechanism 30 to each other, thereby achieving gear shifting. Alternatively, the coupling member in the clutch control unit 53 may be provided in the gear shift mechanism 40, so that after the centrifugal block 501 rotates the clutch control unit 53 to a certain angle, the coupling portion in the clutch control unit 53 connects two (or more) members in the gear shift mechanism 40 to each other, thereby achieving gear shifting. In other words, the clutch control unit 53 may be provided between the transmission mechanism 40 and the output mechanism 30 and used to control the coupling of the transmission mechanism 40 and the output mechanism 30 with each other, or the clutch control unit 53 may be provided in the transmission mechanism 40 and used to control the coupling of members within the transmission mechanism 40 with each other.

[0052] To understand, in conventional automatic internal gear hubs, the centrifugal blocks and clutch control units that control different shift positions are independent of each other. Therefore, in the specific adjustment process, different centrifugal blocks are thrown by centrifugal force, which in turn controls and rotates different clutch control units, thereby enabling adjustment between multiple shift positions. For example, if an automatic internal gear hub has three shift positions, it typically includes a second-speed centrifugal block, a third-speed centrifugal block, a first clutch control unit, and a second clutch control unit, with the second-speed centrifugal block connected to the first clutch control unit and the third-speed centrifugal block connected to the second centrifugal control unit. When the bicycle is in first gear, neither the second-speed nor the third-speed centrifugal block operates. After the bicycle's speed increases to a certain level, the 2nd gear centrifugal block is "thrown" outward by centrifugal force, which rotates the 1st clutch control unit and connects the clutch controller in the 1st clutch control unit to the 2nd gear planetary gear train in the transmission mechanism. In this case, the bicycle is in 2nd gear. If the bicycle's speed increases further, the 3rd gear centrifugal block is "thrown" outward by centrifugal force, which rotates the 2nd clutch control unit and connects the clutch controller in the 2nd clutch control unit to the 3rd gear planetary gear train in the transmission mechanism. In this case, the bicycle is in 3rd gear. During use, the phenomenon of "skipping" occurs very easily. For example, if the 2nd gear centrifugal block is "thrown" and does not rotate the 1st clutch control unit to adjust to 2nd gear, the 3rd gear centrifugal block has already been "thrown" and rotates the 2nd clutch control unit, entering 3rd gear. As a result, the bicycle skips from 1st to 2nd gear and jumps directly to 3rd gear, creating a phenomenon called "jumping," which affects the cyclist's cycling experience.

[0053] In this embodiment, the clutch control unit 53 is connected via the centrifugal block 501, and by rotating the clutch control unit 53 at different angles in the same direction via the centrifugal block 501, adjustment of different shift positions is achieved. As a result, the process of adjusting from a low-speed shift position to a high-speed shift position always passes through an intermediate-speed shift position. This effectively avoids the phenomenon of "skipping" and better ensures the cyclist's cycling experience.

[0054] Specifically, in this embodiment, the automatic internal gear hub 100 is provided with six centrifugal blocks 501, and all six centrifugal blocks 501 are connected to the same clutch control unit 53, thereby enabling the six centrifugal blocks to operate in synchronization with the clutch control unit 53. For convenience of description, one of the six centrifugal blocks 501 is the first centrifugal block 51, and one is the second centrifugal block 52. Of course, in other embodiments, the number of centrifugal blocks provided in the automatic internal gear hub 100 may be more or less. In this embodiment, the six centrifugal blocks enable more stable control of the clutch control unit 53 and better ensure the stability of the shift.

[0055] Preferably, the clutch control unit 53 includes a synchronous ring 531, a control sleeve 532, and a clutch controller 533, wherein the centrifugal block 501 is connected to the synchronous ring 531, the control sleeve 532 is connected to the synchronous ring 531, and the clutch controller 533 is located between the transmission mechanism 40 and the output mechanism 30. The centrifugal block 501 is capable of rotating the control sleeve 532 by rotating the synchronous ring 531 to control the clutch controller 533. In the first state, the control sleeve 532 controls the clutch controller 533 to couple the first planetary gear train 41 to the output mechanism 30. In the second state, the control sleeve 532 controls the clutch controller 533 to couple the second planetary gear train 42 to the output mechanism 30. In other words, in this embodiment, the clutch control unit 53 is provided between the gear shift mechanism 40 and the output mechanism 30, and the clutch control unit 53 is used to control the coupling between the gear shift mechanism 40 and the output mechanism 30. By rotating the synchronous ring 531 via the centrifugal block 501, the control sleeve 532 is rotated via the synchronous ring 531, and the clutch controller 533 is further controlled via the control sleeve 532, thereby coupling the first planetary gear train 41 and the output mechanism 30 via the clutch controller 533 and achieving two-speed gear shifting. Furthermore, by further rotating the synchronous ring 532 via the centrifugal block 501, the control sleeve 532 is further rotated via the synchronous ring 531, and the clutch controller 533 is further controlled via the control sleeve 532, thereby coupling the second planetary gear train 42 and the output mechanism 30 via the clutch controller 533 and achieving three-speed gear shifting.

[0056] Specifically, in this embodiment, the six centrifugal blocks 501 are distributed in an annular array on the synchronous ring 531.

[0057] Preferably, the clutch controller 533 includes a hub bush 5331, a first click 5332, and a second click 5333, wherein the hub bush 5331 is connected to the output mechanism 30, and the first click 5332 and the second click 5333 are each rotatably connected to the hub bush 5331. In the first state, the control sleeve 532 controls the first click 5332 to couple the first click 5332 to the first planetary gear train 41. In the second state, the control sleeve 532 controls the second click 5333 to couple the second click 5333 to the second planetary gear train 42. That is, in this embodiment, the clutch controller 533 is mounted on the output mechanism 30, and the clutch controller 533 is a click-type controller, and after the rotational speed of the output mechanism 30 reaches a certain level, it controls the corresponding click via the control sleeve 532 to achieve coupling between the gear shift mechanism 40 and the output mechanism 30. Of course, in other embodiments, the clutch controller 533 may employ a clutch controller of a different type structure, for example, a click-type, roller-type, wedge-type, or a type in which a click and a roller are coupled.

[0058] Preferably, the first click 5332 and the second click 5333 are spaced apart from each other along the axial direction, and a first control groove 5321 and a second control groove 5322 are provided in the control sleeve 532, the first control groove 5321 penetrates the control sleeve 532 radially and is provided along the axial direction corresponding to the first click 5332, the second control groove 5322 penetrates the control sleeve 532 radially and is provided along the axial direction corresponding to the second click 5333. In the first state, the inner wall of the first control groove 5321 contacts and pushes down the first click 5332, causing the first click 5332 to connect to the first planetary gear train 41 through the first control groove 5321. In the second state, the inner wall of the second control groove 5322 contacts and pushes down the second click 5333, causing the second click 5333 to connect to the second planetary gear train 42 through the second control groove 5322. This better avoids interference between the structures, better ensures control stability, and at the same time makes the structure more compact, requiring less space to be occupied. When the centrifugal block 501 is subjected to centrifugal force and a portion is "thrown" to the first state, the control sleeve 532 is rotated, causing the groove wall of the first control groove 5321 to contact and push down the first control click 5332, thereby connecting the first planetary gear train 42 and the output mechanism 30 via the first control click 5332 and achieving shift speed change. When the centrifugal block 501 is subjected to centrifugal force and is completely "thrown" to the second state, the control sleeve 532 is further rotated so that the groove wall of the second control groove 5322 comes into contact with and pushes down the second click 5333, thereby coupling the second planetary gear train 43 and the output mechanism 30 via the second control click 5333 and achieving shift speed change.

[0059] In this embodiment, it should be noted that both the axial and radial directions are axial and radial directions along the hub axis 10.

[0060] Specifically, in this embodiment, a click mounting groove 5334 is provided on the inner surface of the hub bush 5331, and the first click 5332 and the second click 5333 are correspondingly mounted in the click mounting groove 5334. A hub connection groove 5335 is provided on the outer surface of the hub bush 5331, and the hub bush 5331 is fixedly connected to the output mechanism 30 via the hub connection groove 5335. The first click 5332 includes a rotating part 5336 correspondingly mounted in the click mounting groove 5334, an operating part 5337, and a control unit 5338 extending axially from the operating part 5337. The control sleeve 532 is used to contact the control unit 5338, thereby pushing down the first click 5332 and coupling the operating part 5337 with the first planetary gear train 41. A coupling groove 4111 is provided on the outer surface of the ring gear 411 of the first planetary gear train 41. When the control sleeve 532 pushes down the first click 5332, the actuation part 5337 is inserted into the coupling groove 4111 in response, thereby achieving coupling between the two. The structure of the second click 5333 is basically similar to that of the first click 5332, and will not be elaborated upon here. Furthermore, the coupling structure of the second planetary gear train 42 with the second click 5333 is similar to the coupling structure of the first planetary gear train 41, and will not be elaborated upon here.

[0061] Preferably, the synchronous ring 531 includes a synchronous ring body 5311, a centrifugal block connecting projection 5312, and a control sleeve connecting projection 5313, wherein the centrifugal block connecting projection 5312 is provided at one end of the synchronous ring body 5311 along the axial direction, the centrifugal block 501 is connected to the centrifugal block connecting projection 5312, the control sleeve connecting projection 5313 is provided at the other end of the synchronous ring body 5311 along the axial direction, and the control sleeve 532 is connected to the control sleeve connecting projection 5313. This better ensures connection stability between the synchronous ring 531, the centrifugal block 501, and the control sleeve 532. Here, the connection between the synchronous ring 531 and the control sleeve 532 may be rigid or flexible. A rigid connection means that the synchronous ring 531 and the control sleeve 532 are directly connected, and the synchronous ring 531 can rotate the control sleeve 532 in synchronization. Flexible connection means that the synchronization ring 531 and the control sleeve 532 can be connected via a buffering and energy storage member (for example, a torsion spring), and the synchronization ring 531 can rotate the control sleeve 532 with a relative delay.

[0062] Preferably, the automatic internal gear hub 100 further includes a first elastic recovery member 60, which is connected to the output mechanism 30 and is used to provide a first restoring force for the centrifugal block 501 by its own elasticity, such that the centrifugal block 501 returns along a second direction and maintains an initial state. The second and first directions are two opposite directions. The initial state means the state that the centrifugal block 501 maintains when not subjected to centrifugal force, and in this embodiment, specifically, the state when the automatic internal gear hub 100 is in first gear.

[0063] Preferably, the automatic internal gear hub 100 further includes a second elastic recovery member 70 and a damping member 80, the ends of which are connected to the damping member 80 and the output mechanism 30, respectively, the damping member 80 is used to prevent the centrifugal block 501 from moving, and the damping member 80 is used to provide a second restoring force to the centrifugal block 501 by the elasticity of the second elastic recovery member 70 so that the centrifugal block 501 returns to its original position and maintains the first state.

[0064] Both the first elastic recovery member 60 and the second elastic recovery member 70 are members that can generate elastic strain after being subjected to a force, and that can return to their initial state after the applied force is reduced or removed.

[0065] The fact that the centrifugal block 501 returns to its initial state means that, due to the tendency of the centrifugal block 501 to rotate to its initial state position, if the centrifugal force acting on the centrifugal block 501 is reduced or eliminated, the first restoring force can rotate the centrifugal block 501 toward its initial position, and at the same time, even after the rotation is completed, the first restoring force can maintain the state of the centrifugal block 501. In other words, the first elastic recovery member 60 is used to provide the centrifugal block 501 with a force opposite to the tendency of the centrifugal force, thereby allowing the centrifugal block 501 to fully recover via the first elastic recovery member 60, and restoring the shift position. As a result, when the centrifugal block 501 is subjected to centrifugal force, the centrifugal force will always resist the first restoring force that the first elastic recovery member 60 applies to the centrifugal block 501, thereby allowing the centrifugal block 501 to be "thrown" outwards, and thereby allowing the clutch control unit 53 to rotate sufficiently and achieve gear shifting. It should be noted that the first restoring force that the first elastic recovery member 60 applies to the centrifugal block 501 may be applied to the centrifugal block 501 directly or indirectly. For example, the first elastic member 60 may be directly connected to the first centrifugal block 51, thereby allowing the first elastic member 53 to act directly on the first centrifugal block 51, or the first elastic member 60 may be connected to the clutch control unit 53, thereby allowing the first elastic member 53 to act directly on the clutch control unit 53 and indirectly provide the first restoring force to the centrifugal block 501 via the clutch control unit 53, and furthermore, the first elastic member 60 may be connected to other intermediate members and act on the centrifugal block 501 via other intermediate members, that is, the first restoring force provided by the elasticity of the first elastic member 60 only needs to act on the centrifugal block 501. In addition, the first restoring force may completely restore the centrifugal block 501 to its initial position, or the first restoring force may restore a part of the centrifugal block 501 to its initial position.In other words, the first restoring force should rotate the centrifugal block 501 in the reverse direction, thereby rotating the clutch control unit 53 and achieving a change in the shift position.

[0066] The fact that the centrifugal block 501 returns to its original position and maintains the first gear state means that when the centrifugal force acting on the centrifugal block 501 decreases due to the tendency of the centrifugal block 501 to rotate to its initial position, the second restoring force can rotate the second centrifugal block 501 toward its initial position, and even after the rotation is complete, the second restoring force can maintain the state of the second centrifugal block 501. In other words, the second elastic recovery member 70 is used to provide the centrifugal block 501 with a force opposite to the tendency of the centrifugal force via the damping member 80, thereby allowing a portion of the centrifugal block 501 to recover via the damping member 80, restoring the shift position and maintaining the second gear state. As a result, when the centrifugal block 501 is subjected to centrifugal force, the centrifugal force will always resist the second restoring force that the damping member 80 applies to the centrifugal block 501, thereby allowing the centrifugal block 52 to be completely "thrown" outwards, and the clutch control unit 53 to rotate sufficiently to achieve gear shifting. It should be noted that in other embodiments, the second restoring force may completely restore the centrifugal block 501 to its initial position.

[0067] This allows the automatic internal gear hub 100 to automatically recover via the first elastic recovery member 60 and the second elastic recovery member 70, enabling it to automatically switch to a low-speed shift position after the vehicle speed decreases, further ensuring a pleasant cycling experience.

[0068] Specifically, in this embodiment, the first elastic recovery member 60 is used to act on the first centrifugal block 51, and the second elastic recovery member 70 is used to act on the second centrifugal block 52. Of course, in other embodiments, the first elastic recovery member 60 and the second elastic recovery member 70 may act on the same centrifugal block 501 simultaneously. In this embodiment, the first elastic recovery member 60 and the second elastic recovery member 70 act on different centrifugal blocks 501, thereby facilitating the installation of each member and avoiding interference between the members.

[0069] Preferably, the automatic internal gear hub 100 further includes a first elasticity adjustment structure 90, and the first elasticity recovery member 60 is connected to the output mechanism 30 via the first elasticity adjustment structure 90.

[0070] The first elasticity adjustment structure 90 includes a first adjustment member 91 and a first drive member 92. The first adjustment member 91 is connected to the first elastic recovery member 60, and the first drive member 92 is connected to the output mechanism 30. The first drive member 92 is also connected to the first adjustment member 91, and the first drive member 92 can change the strain state of the first elastic recovery member 60 by operating the first adjustment member 91 to change the first restoring force received by the first centrifugal block 51. That is, the first drive member 92 is mounted on the output mechanism 30, and the first drive member 92 is used to provide driving force to the first adjustment member 91 so that the first adjustment member 91 is operated. The operation of the first adjustment member 91 means that the first adjustment member 91 moves or rotates relative to the first elastic recovery member 60, thereby biasing the first elastic recovery member 60, generating strain in the first elastic recovery member 60, and changing the strain state of the first elastic recovery member 60. By changing the first restoring force that the first elastic recovery member 60 applies to the first centrifugal block 51, the first centrifugal block 51 can receive a smaller centrifugal force and be partially "thrown out" (or the first centrifugal block 51 needs to receive a larger centrifugal force in order to be partially "thrown out"). In other words, in this embodiment, the first adjustment member 91 is movable relative to the first elastic recovery member 60, thereby changing the strain state of the first elastic recovery member 60 and further changing the magnitude of the first restoring force that the first elastic recovery member 60 applies to the first centrifugal block 51, so that the internal gear hub 100 can "throw out" the centrifugal block 501 at different rotational speeds as needed, thereby meeting the cycling needs of different cyclists. The first drive member 92 is used to provide driving force to the first adjustment member 91 and to drive the first adjustment member 91.The first drive member 92 may be manually driven to provide driving force for the first adjustment member 91, or it may be automatically driven to provide driving force for the first adjustment member 91; in other words, it is sufficient that the first adjustment member 91 can be driven via the first drive member 92.

[0071] Preferably, the automatic internal gear hub 100 further includes a second elasticity adjustment structure 110, and the second elastic recovery member 70 is connected to the output mechanism 30 via the second elasticity adjustment structure 110.

[0072] The second elasticity adjustment structure 110 includes a second adjustment member 111 and a second drive member 112, the second adjustment member 111 being connected to the second elastic recovery member 70, the second drive member 112 being connected to the output mechanism 30, and the second drive member 112 being connected to the second adjustment member 111, and the second drive member 112 is capable of changing the strain state of the second elastic recovery member 70 by operating the second adjustment member 111 so as to change the second restoring force that the damping member 80 provides to the second centrifugal block 52. That is, the second drive member 112 is mounted on the output mechanism 30, and the second drive member 112 is used to provide driving force to the second adjustment member 111 so as to operate the second adjustment member 111. The operation of the second adjusting member 111 means that the second adjusting member 111 moves or rotates relative to the second elastic recovery member 70, thereby biasing the second elastic recovery member 70, generating strain in the second elastic recovery member 70, and changing the strain state of the second elastic recovery member 70. By changing the second restoring force that the damping member 80 applies to the second centrifugal block 52, the second centrifugal block 52 can receive a smaller centrifugal force and be completely "thrown" outwards (or the second centrifugal block 52 needs to receive a larger centrifugal force in order to be completely "thrown" outwards). In other words, in this embodiment, the second adjustment member 111 is movable relative to the second elastic recovery member 70, thereby changing the strain state of the second elastic recovery member 70 and further changing the magnitude of the second restoring force that the second elastic recovery member 70 imparts to the second centrifugal block 52 via the damping member 80, so that the internal gear hub 100 can achieve the centrifugal block 501 to be completely "thrown out" at different rotational speeds as needed, thereby meeting the cycling needs of different cyclists. The second drive member 112 is used to provide driving force to the second adjustment member 111 and to drive the second adjustment member 111.The second drive member 112 may be manually driven to provide driving force for the second adjustment member 111, or it may be automatically driven to provide driving force for the second adjustment member 111; in other words, it is sufficient that the second adjustment member 111 can be driven via the second drive member 112.

[0073] In this embodiment, the second restoring force is used to restore a portion of the second centrifugal block 52 to its initial position. Specifically, after the rotational speed of the output mechanism 30 increases, the centrifugal force acting on the first centrifugal block 51, in opposition to the first restoring force, causes a portion of the six centrifugal blocks 501 to be "thrown out," rotating the clutch control unit 53 and shifting from first gear to second gear. In second gear, the second centrifugal block 52 is just in contact with the damping member 80, and the second centrifugal block 52 is blocked by the damping member 80. After the rotational speed of the output mechanism 30 increases further, the centrifugal force acting on the second centrifugal block 52, in opposition to the second restoring force, causes the six centrifugal blocks 501 to be completely "thrown out," further rotating the clutch control unit 53 and shifting from second gear to third gear. The damping member 80 also prevents the second centrifugal block 52 from jumping during the cycling process, thereby improving the cyclist's cycling experience. In other words, in this embodiment, the second restoring force is used to move the second centrifugal block 52 from the second state in which it is completely "thrown out" to the first state in which it is partially "thrown out," that is, to shift the automatic internal gear hub 100 from third gear to second gear. The damping member 80 also helps to better maintain the automatic internal gear hub 100 in second gear, thereby better ensuring stability of the state.

[0074] To understand, in conventional automatic internal gear hubs, the elastic recovery member is directly connected to the hub, and the restoring force that the elastic recovery member applies to the centrifugal block is constant. As a result, the centrifugal block is "thrown" and the automatic internal gear hub performs gear changes at the same rotational speed each time. Different cyclists have different gear change needs. For example, some cyclists need to be able to "throw" the centrifugal block at relatively low speeds to achieve gear changes, while others need to "throw" the centrifugal block at relatively high speeds to achieve gear changes. Conventional automatic internal gear hubs cannot meet this particular need of cyclists and are therefore limited.

[0075] The automatic internal gear hub 100 provided in this embodiment is connected to the first elastic recovery member 60 via the first adjustment member 91, and the first adjustment member 91 can be driven via the first drive member 92 to operate. This allows the cyclist to apply driving force to the first adjustment member 91 via the first drive member 92 as needed, thereby "compressing" or "relaxing" the first elastic recovery member 60 and changing the first restoring force that the first elastic recovery member 60 applies to the first centrifugal block 51. This allows the cyclist to "throw out" the first centrifugal block 51 at relatively low speeds, or to "throw out" the first centrifugal block 51 only at relatively high speeds. The second elasticity adjustment structure 110 also allows for adjustment of the elasticity of the second elastic recovery member 70. The automatic internal gear hub 100 can better meet the different cycling needs of cyclists.

[0076] Preferably, the first adjustment member 91 is rotatably connected to the output mechanism 30, and the first elastic recovery member 60 is a torsion spring. The first drive member 92 can twist the first elastic recovery member 60 by rotating the first adjustment member 91. More preferably, both ends of the first elastic recovery member 60 are connected to the first adjustment member 91 and the first centrifugal block 51, respectively. That is, in this embodiment, the first elastic recovery member 60 is directly connected to the first centrifugal block 51, and the torsional force of the first elastic recovery member 60 imparts the first restoring force to the first centrifugal block 51. Furthermore, the first adjustment member 91 is connected to the output mechanism 30, and the first adjustment member 91 is rotatable relative to the output mechanism 30, thereby twisting the first elastic recovery member 60 and adjusting the torsional force of the first elastic recovery member 60. Of course, in other embodiments, the first elastic recovery member 60 may be replaced with other elastic members, such as tension springs or compression springs. Furthermore, the first adjustment member 91 may be slidably mounted on the output mechanism 30, thereby changing the strain state of the first elastic recovery member 60 by moving the first adjustment member 91. In addition, the first elastic recovery member 60 may not be directly connected to the first centrifugal block 51, but rather applied to the first centrifugal block 51 via other intermediate members. In this embodiment, the first elastic recovery member 60 is a torsion spring, and the first adjustment member 91 is rotatably connected to the output mechanism 30, thereby simplifying the overall structure, reducing the space required, making placement more convenient, and simultaneously increasing the stability of the control process. Direct connection of the first elastic recovery member 60 to the first centrifugal block 51 also allows for better application of force to the first centrifugal block 51.

[0077] Preferably, the first adjusting member 91 is provided with a first gear 911, and the first driving member 92 meshes with the first gear 911. That is, both the first adjusting member 91 and the first driving member 92 are provided with teeth, and the first driving member 92 and the first gear 911 mesh with each other. This better ensures that the first driving member 92 drives the first adjusting member 91, better guarantees that the first driving member 92 can rotate the first adjusting member 91, and ensures stability during the driving process. At the same time, it better avoids unexpected sliding between the first driving member 92 and the first adjusting member 91, and better guarantees that the position of the first adjusting member 91 is maintained after it has been sufficiently adjusted.

[0078] Preferably, the first drive member 92 includes a first drive stud 921 and a drive rack 922, and a first screw hole 31 is provided in the output mechanism 30, the first drive stud 921 is correspondingly mounted in the first screw hole 31, the drive rack 922 meshes with the first gear 911, and the first drive stud 921 can rotate the first adjustment member 91 by moving the drive rack 922. That is, the first drive stud 921 is mounted in the first screw hole 31, and by tightening the first drive stud 921, the first drive stud 921 can be moved, and furthermore, the drive rack 922 is moved via the first drive stud 921, and the first adjustment member 91 is rotated. In the first drive member 92 provided in this embodiment, the first drive stud 921 engages with the first screw hole 31 and drives the first adjustment member 91 via the drive rack 922, enabling the first drive member 92 to self-lock. After adjustment, the screwing between the first drive stud 921 and the first screw hole 31 prevents the first drive member 92 from moving in the reverse direction, better ensuring the reliability and effectiveness of the adjustment. In other words, in this embodiment, a manual drive structure is adopted for the first drive member 92, and when a cyclist needs to adjust the automatic internal gear hub 100, this can be achieved by manually tightening the first drive stud 921, resulting in a simple and reliable structure and effectively reducing costs. Of course, in other embodiments, any other implementation method may be adopted for the specific installation structure of the first drive member 92, and a rotary structure, such as a cam structure, may be adopted for the first drive stud 921.

[0079] Preferably, the first drive member 92 further includes a first return spring 923, the ends of which are connected to the drive rack 922 and the output mechanism 30, respectively, and the first return spring 923 is used to provide a restoring force for the drive rack 922 by its own elasticity. That is, the first return spring 923 is used to compress the first return spring 923 when the cyclist adjusts the first drive stud 921 closer to the drive rack 922 by providing the drive rack 922 with a force acting in the opposite direction to the first drive stud 921. When the cyclist adjusts the first drive stud 921 away from the drive rack 922, the first return spring 923 stiffens by its own elasticity, causing the drive rack 922 to move to one side closer to the first drive stud 921. As a result, when a cyclist adjusts the first drive stud 921 in the forward direction, the drive rack 922 is moved towards one side closer to the first return spring 923 via the first drive stud 921, thereby linking the first adjustment member 91 to the drive rack 922 so that the first elastic recovery member 60 is twisted and compressed. On the other hand, when a cyclist adjusts the first drive stud 921 in the reverse direction, the drive rack 922 is moved towards one side closer to the first drive stud 921 via the first return spring 923, thereby linking the first adjustment member 91 to the drive rack 922 so that the first elastic recovery member 60 is relaxed. By adjusting only the first drive stud 921, the elasticity of the first elastic recovery member 60 can be adjusted, making the adjustment process more convenient and easier, while simultaneously simplifying the structure, improving reliability, and reducing the required space.

[0080] Preferably, the second adjustment member 111 is rotatably connected to the output mechanism 30, the second elastic recovery member 70 is a torsion spring, and the second drive member 112 can twist the second elastic recovery member 70 by rotating the second adjustment member 111. That is, in this embodiment, the torsional force of the second elastic recovery member 70 applies the second restoring force to the second centrifugal block 52. Furthermore, the second adjustment member 111 is connected to the output mechanism 30 and is rotatable relative to the output mechanism 30, thereby twisting the second elastic recovery member 70 and adjusting the torsional force of the second elastic recovery member 70. Of course, in other embodiments, other elastic members such as tension springs, compression springs, etc. may be used for the second elastic recovery member 70. Furthermore, the second adjustment member 111 may be slidably mounted on the output mechanism 30, thereby allowing a change in the strain state of the second elastic recovery member 70 by moving the second adjustment member 111. In this embodiment, a torsion spring is used for the second elastic recovery member 70, and the second adjustment member 111 is rotatably connected to the output mechanism 30, thereby simplifying the overall structure, reducing the space required, making placement more convenient, and simultaneously increasing the stability of the control process.

[0081] Preferably, the second adjusting member 111 is provided with a second gear 1111, and the second driving member 112 meshes with the second gear 1111. That is, both the second adjusting member 111 and the second driving member 112 are provided with teeth, and the second driving member 112 and the second gear 1111 mesh with each other. This better ensures that the second driving member 112 drives the second adjusting member 111, better guarantees that the second driving member 112 can rotate the second adjusting member 111, and ensures stability during the driving process. At the same time, it better avoids unexpected sliding between the second driving member 112 and the second adjusting member 111, and better guarantees that the second adjusting member 111 will maintain its position after being sufficiently adjusted.

[0082] Preferably, the second drive member 112 includes a second drive stud 1121 and a second drive assembly 1122, and a second screw hole 32 is provided in the output mechanism 30, the second drive stud 1121 is correspondingly mounted in the second screw hole 32, the second drive assembly 1122 meshes with the second gear 1111, and the second drive stud 1121 can rotate the second adjustment member 111 by operating the second drive assembly 1122. That is, the second drive stud 1121 is mounted in the second screw hole 32, thereby the second drive stud 1121 can be moved by tightening the second drive stud 1121, and furthermore the second drive assembly 1122 is operated via the second drive stud 1121, thereby rotating the second adjustment member 111. In the second drive member 112 provided in this embodiment, the second drive stud 1121 engages with the second screw hole 32 and drives the second adjustment member 111 via the second drive assembly 1122, enabling the second drive member 112 to self-lock. After adjustment, the screwing between the second drive stud 1121 and the second screw hole 32 prevents the second drive assembly 1122 from moving in the reverse direction, better ensuring the reliability and effectiveness of the adjustment. In other words, in this embodiment, a manual drive structure is adopted for the second drive member 112, and when a cyclist needs to adjust the automatic internal gear hub 100, this can be achieved by manually tightening the second drive stud 1121, resulting in a simple and reliable structure and effectively reducing costs. Of course, in other embodiments, any other implementation method may be adopted for the specific installation structure of the second drive member 112, for example, a cam structure.

[0083] Preferably, the second drive assembly 1122 includes an oscillating gear 11221 and an intermediate gear 11222, wherein the oscillating gear 11221 is rotatably connected to the output mechanism 30, the intermediate gear 11222 is rotatably connected to the output mechanism 30, and the intermediate gear 11222 meshes with the oscillating gear 11221 and the second gear 1111, respectively, and the second drive stud 1121 can rotate the intermediate gear 11222 by oscillating the oscillating gear 11221, thereby rotating the second adjustment member 111. That is, both the oscillating gear 11221 and the intermediate gear 11222 are mounted on the output mechanism 30, and both the oscillating gear 11221 and the intermediate gear 11222 are rotatable relative to the output mechanism 30. As a result, when a cyclist adjusts the second drive stud 1121, the second drive stud 1121 is able to oscillate the oscillating gear 11221, which in turn causes the oscillating gear 11221 to rotate the intermediate gear 11222, which in turn rotates the second adjustment member 111 and adjusts the torsional force of the second elastic recovery member 70.

[0084] Preferably, the second drive member 112 further includes a second recovery torsion spring 1123, the ends of which are connected to the oscillating gear 11221 and the output mechanism 30, respectively, and the second recovery torsion spring 1123 is used to provide a restoring force for the oscillating gear 11221 by its own elasticity. That is, the second recovery torsion spring 1123 is used to compress the second recovery torsion spring 1123 when the cyclist adjusts the second drive stud 1121 closer to the oscillating gear 11221 by providing the oscillating gear 11221 with a force acting in the opposite direction to that of the second drive stud 1121. When a cyclist adjusts the second drive stud 1121 away from the oscillating gear 11221, the second recovery torsion spring 1123 stiffens due to its own elasticity, causing the oscillating gear 11221 to move to one side closer to the second drive stud 1121. As a result, when a cyclist adjusts the second drive stud 1121 in the forward direction, the oscillating gear 11221 is oscillated in the forward direction via the second drive stud 1121, which in turn rotates the intermediate gear 11222 via the oscillating gear 11221, and further causes the second elastic recovery member 70 to twist and compress via the first adjustment member 59. When a cyclist adjusts the second drive stud 1121 in the reverse direction, the oscillating gear 11221 is oscillated in the reverse direction via the second recovery torsion spring 1123, thereby rotating the intermediate gear 11222 via the oscillating gear 11221, and further loosening the second elastic recovery member 70 via the first adjustment member 59. By adjusting only the second drive stud 1121, the elasticity of the second elastic recovery member 70 can be adjusted, making the adjustment process more convenient and easier, while simultaneously simplifying the structure, improving reliability, and reducing the required space.

[0085] Preferably, the output mechanism 30 includes a hub body 33 and a mounting base 34, the mounting base 34 being fixedly connected to the hub body 33, the first elasticity adjustment structure 90 and the second elasticity adjustment structure 110 both being connected to the mounting base 34, and the centrifugal block 501 being rotatably connected to the mounting base 34. This allows the mounting base 34 to better support each component, ensure the position of each component, and ensure the stability of each component during adjustment.

[0086] Preferably, the mounting base 34 has a slide groove 342 having an opening 341 at one end, the slide groove 342 extends along the rotational direction of the second centrifugal block 52, the second centrifugal block 52 includes a centrifugal block body 521 and a centrifugal block projection 522, the centrifugal block body 521 is rotatably connected to the mounting base 34, the centrifugal block projection 522 is connected to the centrifugal block body 521, the damping member 80 is provided offset from the centrifugal block body 521 along the axial direction, the centrifugal block projection 522 is located in the slide groove 342 and after the second centrifugal block 52 rotates under centrifugal force, the centrifugal block projection 522 can slide out from the opening 341 and out of the slide groove 342, the damping member 80 is correspondingly located at the opening 341 and used to block the centrifugal block projection 522. This allows the position of the second centrifugal block 52 to be better guided via the slide groove 342, and also makes the overall structure more compact, saving more space that needs to be placed. Specifically, in this embodiment, in the first state, the centrifugal block projection 522 is positioned just at the opening 341 and is blocked by the damping member 80, thereby better maintaining stability in second gear.

[0087] Preferably, the automatic internal gear hub 100 further includes a damping member suction unit 120, which is connected to the mounting base 34, and is used to suction the damping member 80 so that the damping member 80 is in an initial position. That is, the damping member suction unit 120 is used to prevent the second centrifugal block 52 from moving by providing suction force to the damping member 80, thereby keeping the damping member 80 in an initial position. In this embodiment, specifically, the damping member suction unit 120 is located in the first state region where a portion of the second centrifugal block 52 is "thrown out", i.e., near the opening 341. In other words, the damping member suction unit 120 is located in the region where the second centrifugal block 52 is located when the automatic internal gear hub 100 is in second gear. In this embodiment, the damping member adsorption unit 120 is made of iron, and a magnet 81 is provided on the damping member 80, so the damping member adsorption unit 120 attracts the damping member 80 by magnetic force. Of course, in other embodiments, the damping member adsorption unit 120 is a magnet, but the damping member 80 may be made of an iron material to attract the damping member adsorption unit 120 to the damping member 80. Furthermore, the iron material may be made of a material that can be attracted to any other magnet, that is, it is sufficient that an attractive force is generated on the damping member 80 via the damping member adsorption unit 120, and the initial position of the damping member 80 is maintained.

[0088] In this embodiment, by providing the damping member suction unit 120, during the process of the automatic internal transmission 100 shifting from 3rd gear to 2nd gear, the damping member suction unit 120 can generate a suction force on the damping member 80, thereby speeding up the process of shifting from 3rd gear to 2nd gear and shortening the shift time. As can be understood, if the damping member suction unit 120 is not provided and an attempt is made to speed up the process of shifting from 3rd gear to 2nd gear, it is necessary to adjust the torsional force of the second elastic recovery member 70. However, increasing the torsional force of the second elastic recovery member 70 makes it more difficult to shift from 2nd gear to 3rd gear, and the second restoring force that must be resisted by centrifugal force becomes larger. In this embodiment, applying magnetic force to the damping member 80 via the damping member suction unit 120 and using that to attract it effectively overcomes this problem. In the process of shifting from 2nd to 3rd gear, initially, the centrifugal force only needs to resist the magnetic force applied to the damping member 80 by the damping member suction unit 120. After the damping member 80 separates from the damping member suction unit 120, there is no continuous opposing force, thus minimizing the impact on the process of shifting from 2nd to 3rd gear. Furthermore, the damping member suction unit 120 also allows the second centrifugal block 52 to be positioned more stably in the 2nd gear position, enabling more accurate shift positioning of the automatic internal gear hub 100.

[0089] Preferably, in the first state, the second centrifugal block projection 522 is located near the opening 341, and the damping member adsorption unit 120 is further used to adsorb the centrifugal block projection 522. Specifically, the centrifugal block projection 562 may be provided with a magnet, or the centrifugal block projection 562 may be directly made of a magnet, thereby allowing the damping member adsorption unit 120 to simultaneously generate a magnetic attraction force on the centrifugal block projection 562, thereby holding the second centrifugal block 52 in the second gear state relatively stably, and also shortening the time required to shift from first gear to second gear and making the shift position more accurate.

[0090] Preferably, the automatic internal gear hub 100 further includes a centrifugal block suction unit 130, the centrifugal block suction unit 130 is connected to the output mechanism 30, and the centrifugal block suction unit 130 is used to suction the centrifugal block 501 so that the centrifugal block 501 maintains the second state. That is, the centrifugal block suction unit 130 is mounted on the output mechanism 30 and used to suction the centrifugal block 501, thereby holding the centrifugal block 501 in a completely "thrown out" state, thereby holding the automatic internal gear hub 100 in the third gear state. Specifically, in this embodiment, the centrifugal block suction unit 130 is located near the region where the centrifugal block 501 is completely "thrown out," that is, the centrifugal block suction unit 130 is located in the region where the centrifugal block 501 is in the third gear state, and the centrifugal block suction unit 130 is provided with a third gear magnet 131, and an iron member is provided in the corresponding region of the centrifugal block 501. As a result, when the centrifugal block 501 rotates to the third gear state due to the action of centrifugal force, the centrifugal block suction unit 130 can attract the centrifugal block 501 by magnetic force, holding the centrifugal block 501 in the third gear state and making the third gear state of the automatic internal gear hub 100 more stable and accurate. Of course, in other embodiments, an iron member may be provided in the centrifugal block suction unit 130 and a magnet may be provided in the centrifugal block 501. Furthermore, the iron component may be made of a material that can be attracted to any other magnet, that is, it is sufficient if an attractive force is generated on the centrifugal block 501 via the centrifugal block attraction unit 130, thereby maintaining the second state of the centrifugal block 501.

[0091] Example 2 Refer to Figures 24 to 27 in combination. This embodiment provides an automatic internal gear hub 200, which is largely the same as the automatic internal gear hub 100 provided in Embodiment 1, with the main difference being the specific structure of the first drive member 210.

[0092] The first drive member 210 includes a rotating plate 220, a link 230, and a rotating plate drive lever 240. The rotating plate 220 is connected to an output mechanism 250, and the rotating plate 220 is connected to a first adjustment member 260 via the link 230. The rotating plate drive lever 240 is movably mounted on the output mechanism 250, and the rotating plate drive lever 240 can rotate the rotating plate 220 such that the link 230 rotates the first adjustment member 260. This allows the rotating plate drive lever 240 to provide driving force and rotate the rotating plate 220, thereby moving the link 230, and further rotating the first adjustment member 260 via the link 230, thereby achieving adjustment to the first elastic recovery member connected to the first adjustment member 260. In this embodiment, the first elastic recovery member is specifically a torsion spring, and the first elastic recovery member is directly connected to the centrifugal block. Similarly, the first elastic recovery member may indirectly provide a first restoring force to the centrifugal block (for example, the first elastic recovery member can be connected to other members such as a damping member or a clutch control unit).

[0093] Preferably, the link 230 is connected to one end of the rotating plate 220, and a turbine structure 270 is provided at the other end of the rotating plate 220. The rotating plate drive lever 240 includes a worm 280 and a drive lever 290. The worm 280 meshes with the turbine structure 270, and the drive lever 290 is connected to the worm 280. The drive lever 290 is movably mounted on the output mechanism 250. By rotating the worm 280, the drive lever 290 can rotate the rotating plate 220 through engagement between the worm 280 and the turbine structure 270. In other words, in this embodiment, the driving of the rotating plate 220 by the rotating plate drive lever 240 is specifically realized by the turbine worm structure, which better ensures interlock between the structures and better ensures the accuracy and stability of the control.

[0094] Specifically, in this embodiment, the specific connection structure between the drive lever 290 and the worm 280 is such that a mounting groove 281 is provided at one end of the worm 280, and a mounting portion 291 that matches the mounting groove 281 is provided at one end of the drive lever 290. This allows the drive lever 290 to be inserted into the mounting groove 281 via the mounting portion 291, thereby better achieving connection between the drive lever 290 and the worm 280 and better ensuring transmission stability.

[0095] Preferably, a mounting hole 251 is provided in the output mechanism 250, and the drive lever 290 is mounted in the mounting hole 251, specifically, the mounting hole 251 may be provided in the hub or end cover. Furthermore, a sealing ring 292 is fitted to the drive lever 290, and the drive lever 290 is compressed against the hole wall of the mounting hole 251 via the sealing ring 292. This better ensures the position of the drive lever 290 and prevents the drive lever 290 from moving and sliding.

[0096] Specifically, in this embodiment, a sealing ring mounting position 293 is provided on the drive lever 290, and the sealing ring 292 is correspondingly mounted at the sealing ring mounting position 293. The worm 280, the rotating plate 220, and the link 230 are all provided on a mounting base connected to the hub in the output mechanism 250. Of course, in other embodiments, the worm 280, the rotating plate 220, and the link 230 may be provided on other structures connected to the hub, depending on the actual needs. According to the automatic internal gear hub 200 provided in this embodiment, the mounting base and the hub / end cover can be kept from having a relative displacement relationship, and the worm 280, the rotating plate 220, and the link 230 mounted on the mounting base may be assembled spaced apart from the drive lever 290 mounted on the hub or end cover, making assembly more convenient and reducing the difficulty of mounting.

[0097] Example 3 Refer to Figures 28 and 29 in combination. This embodiment provides an automatic internal gear hub 300, which is largely the same as the automatic internal gear hub 100 provided in Embodiment 1 and the automatic internal gear hub 200 provided in Embodiment 2, with the main difference being the specific structure of the first drive member 310.

[0098] The first drive member 310 includes a rotating plate 320, a link 330, and a rotating plate drive lever 340. The rotating plate 320 is rotatably connected to the output mechanism 350, and the rotating plate 320 is connected to the first adjustment member 360 via the link 330. The rotating plate drive lever 340 is movably mounted on the output mechanism 350, and the rotating plate drive lever 340 can rotate the rotating plate 320 so that the link 330 rotates the first adjustment member 360. This allows the rotating plate drive lever 340 to provide driving force and rotate the rotating plate 320, thereby moving the link 330, and further rotating the first adjustment member 360 via the link 330, thereby achieving adjustment to the first elastic recovery member connected to the first adjustment member 360. In this embodiment, the first elastic recovery member is specifically a torsion spring, and the first elastic recovery member is directly connected to the centrifugal block. Similarly, the first elastic recovery member may indirectly provide a first restoring force to the centrifugal block (for example, the first elastic recovery member can be connected to other members such as a damping member or a clutch control unit).

[0099] Preferably, the rotating plate drive lever 340 is a stud, and a first screw hole 351 is provided in the output mechanism 350, and the rotating plate drive lever 340 is correspondingly mounted in the first screw hole 351. As a result, by tightening the rotating plate drive lever 340, the rotating plate drive lever 340 can be moved, and further the rotating plate 320 is rotated via the rotating plate drive lever 340, and the link 330 rotates the first adjustment member 360. In the first drive member 310 provided in this embodiment, the first drive member 310 can self-lock by engaging with the first screw hole 351 via the rotating plate drive lever 340. After adjustment, the screwing between the rotating plate drive lever 340 and the first screw hole 351 prevents the first drive member 310 from moving in the reverse direction, better ensuring the reliability and effectiveness of the adjustment. More preferably, torsion springs may be directly provided on the rotating plate 320 and the output mechanism 350, thereby allowing the rotating plate 320 to recover more effectively. More preferably, a sealing ring 341 is provided at the end of the rotating plate drive lever 340.

[0100] Example 4 This embodiment further provides a bicycle comprising a frame and an automatic internal gear hub, the automatic internal gear hub being the automatic internal gear hub 100, automatic internal gear hub 200, or automatic internal gear hub 300. The automatic internal gear hub is mounted on the drive wheel of the frame. Here, the bicycle may be a traditional bicycle, for example, a traditional two-wheeled bicycle, a bicycle in which the driving force is output to the rear wheel via the pedals by the cyclist, and the automatic internal gear hub can be specifically mounted on the rear wheel of a traditional bicycle. Of course, the bicycle may also be an electric assist bicycle, that is, a bicycle equipped with a device that provides extra power to the bicycle, reducing the difficulty of cycling for the cyclist with the extra power source. Specifically, for example, an electric assist bicycle assists with extra electrical energy. Of course, the power source of an assist bicycle is not limited to electrical energy, but may be other types of power sources. Also, the number of wheels of the bicycle is not limited to two, and the number of wheels of the bicycle may be selected according to actual needs.

[0101] The above describes only embodiments of the present invention, and it should be noted that those skilled in the art may make further improvements without departing from the creative concept of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An automatic internal gear hub, comprising a hub shaft, an input mechanism, an output mechanism, a gear shift mechanism, and an automatic shift control mechanism, Both the input mechanism and the output mechanism are rotatably mounted on the hub shaft, and the input mechanism is used to provide driving force to rotate the output mechanism. The gear shift mechanism is mounted on the hub shaft and is located between the input mechanism and the output mechanism. The aforementioned gear shifting mechanism includes at least a first planetary gear train and a second planetary gear train. The automatic shift control mechanism includes a centrifugal block and a clutch control unit, wherein the centrifugal block is rotatably connected to the output mechanism and connected to the clutch control unit. The centrifugal block can rotate the clutch control unit by rotating along a first direction relative to the output mechanism to a first state such that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the first planetary gear train. The centrifugal block can be further rotated to a second state along the first direction relative to the output mechanism, thereby further rotating the clutch control unit, so that the driving force transmitted by the input mechanism is transmitted to the output mechanism via the second planetary gear train. The clutch control unit includes a synchronous ring, a control sleeve, and a clutch, wherein the centrifugal block is connected to the synchronous ring, the control sleeve is connected to the synchronous ring, the clutch is located between the transmission mechanism and the output mechanism, and the centrifugal block is capable of rotating the control sleeve by rotating the synchronous ring to control the clutch. In the first state, the control sleeve controls the clutch to connect the first planetary gear train to the output mechanism. In the second state, the control sleeve controls the clutch to connect the second planetary gear train to the output mechanism. An automatic internal gear hub characterized by the following features.

2. The aforementioned clutch employs a roller clutch. Alternatively, the clutch includes a hub bush, a first click, and a second click, the hub bush being connected to the output mechanism, and the first click and the second click being rotatably connected to the hub bush, In the first state, the control sleeve controls the first click to connect the first click to the first planetary gear train. In the second state, the control sleeve controls the second click to couple the second click to the second planetary gear train. The automatic internal gear hub according to feature 1.

3. If the clutch includes a hub bush, a first click, and a second click, the first click and the second click are spaced apart from each other along the axial direction, and a first control groove and a second control groove are provided in the control sleeve, the first control groove penetrates the control sleeve radially and the first control groove is provided along the axial direction corresponding to the first click, the second control groove penetrates the control sleeve radially and the second control groove is provided along the axial direction corresponding to the second click, In the first state, the inner wall of the first control groove contacts and pushes down the first click, causing the first click to connect to the first planetary gear train through the first control groove. In the second state, the inner wall of the second control groove contacts and pushes down the second click, causing the second click to connect to the second planetary gear train through the second control groove. The automatic internal gear hub according to feature 2.

4. The synchronization ring includes a synchronization ring body, a centrifugal block connecting projection, and a control sleeve connecting projection, wherein the centrifugal block connecting projection is provided at one end of the synchronization ring body along the axial direction, the centrifugal block is connected to the centrifugal block connecting projection, the control sleeve connecting projection is provided at the other end of the synchronization ring body along the axial direction, and the control sleeve is connected to the control sleeve connecting projection. The automatic internal gear hub according to feature 1.

5. Further comprising a first elastic recovery member, The first elastic recovery member is connected to the output mechanism and is used to provide a first restoring force for the centrifugal block by its own elasticity so that the centrifugal block returns along the second direction and maintains its initial state. The second direction and the first direction are two opposite directions. The automatic internal gear hub according to feature 1.

6. The first elasticity adjustment structure is further included, and the first elastic recovery member is connected to the output mechanism via the first elasticity adjustment structure. The first elasticity adjustment structure includes a first adjustment member and a first drive member, wherein the first adjustment member is connected to the first elastic recovery member, the first drive member is connected to the output mechanism, and the first drive member is connected to the first adjustment member, and the first drive member can change the strain state of the first elastic recovery member by operating the first adjustment member to change the first restoring force received by the centrifugal block. The automatic internal gear hub according to feature 5.

7. The first adjusting member is rotatably connected to the output mechanism, the first elastic recovery member is a torsion spring, and the first driving member allows the first elastic recovery member to twist by rotating the first adjusting member. The automatic internal gear hub according to feature 6.

8. The first adjusting member is provided with a first gear, and the first driving member meshes with the first gear. The first drive member includes a first drive stud and a drive rack, the output mechanism has a first screw hole, the first drive stud is fitted correspondingly into the first screw hole, the drive rack meshes with a first gear, and the first drive stud can rotate the first adjustment member by moving the drive rack. The first drive member further includes a first return spring, the ends of which are connected to the drive rack and the output mechanism, respectively, and the first return spring is used to provide a restoring force for the drive rack by its own elasticity. The automatic internal gear hub according to feature 7.

9. The first drive member includes a rotating plate, a link, and a rotating plate drive lever, wherein the rotating plate is rotatably connected to the output mechanism and is connected to the first adjustment member via the link, the rotating plate drive lever is movably mounted on the output mechanism, and the rotating plate drive lever is capable of rotating the rotating plate such that the link rotates the first adjustment member. The link is connected to one end of the rotating plate, and a turbine structure is provided at the other end of the rotating plate. The rotating plate drive lever includes a worm and a drive lever, the worm meshes with the turbine structure, the drive lever is connected to the worm, and the drive lever is movably mounted on the output mechanism. The drive lever rotates the worm, thereby causing the rotating plate to rotate due to the engagement between the worm and the turbine structure. A mounting hole is provided in the output mechanism, the drive lever is mounted in the mounting hole, and a sealing ring is fitted to the drive lever, and the drive lever is tightly fitted to the wall of the mounting hole via the sealing ring. The rotating plate drive lever is a stud, and a first screw hole is provided in the output mechanism, and the rotating plate drive lever is correspondingly mounted in the first screw hole. The automatic internal gear hub according to feature 7.

10. The present invention further includes a second elastic recovery member and a damping member, Both ends of the second elastic recovery member are connected to the damping member and the output mechanism, respectively, the damping member is used to prevent the centrifugal block from moving, and the damping member is used to provide a second restoring force to the centrifugal block by the elasticity of the second elastic recovery member so that the centrifugal block returns along the second direction and maintains the first state. The automatic internal gear hub according to any one of claims 6 to 9.

11. The second elasticity adjustment structure is further included, and the second elastic recovery member is connected to the output mechanism via the second elasticity adjustment structure. The second elasticity adjustment structure includes a second adjustment member and a second drive member, wherein the second adjustment member is connected to the second elastic recovery member, the second drive member is connected to the output mechanism, and the second drive member is connected to the second adjustment member, and the second drive member can change the strain state of the second elastic recovery member by operating the second adjustment member so as to change the second restoring force that the damping member provides to the centrifugal block. The automatic internal gear hub according to feature 10.

12. The second adjusting member is rotatably connected to the output mechanism, the second elastic recovery member is a torsion spring, and the second driving member allows the second elastic recovery member to twist by rotating the second adjusting member. The automatic internal gear hub according to feature 11.

13. The second adjusting member is provided with a second gear, and the second driving member meshes with the second gear. The second drive member includes a second drive stud and a second drive assembly, the output mechanism has a second screw hole, the second drive stud is fitted into the corresponding second screw hole, the second drive assembly meshes with the second gear, and the second drive stud can rotate the second adjustment member by operating the second drive assembly. The second drive assembly includes an oscillating gear and an intermediate gear, the oscillating gear being rotatably connected to the output mechanism, the intermediate gear being rotatably connected to the output mechanism, and the intermediate gear meshing with the oscillating gear and the second gear respectively, and the second drive stud is capable of rotating the intermediate gear and the second adjusting member by oscillating the oscillating gear. The second drive member further includes a second recovery torsion spring, the ends of which are connected to the oscillating gear and the output mechanism, respectively, and the second recovery torsion spring is used to provide a restoring force for the oscillating gear by its own elasticity. The automatic internal gear hub according to feature 12.

14. The output mechanism includes a hub body and a mounting base, the mounting base being fixedly connected to the hub body, the first elasticity adjustment structure and the second elasticity adjustment structure both being connected to the mounting base, and the centrifugal block being rotatably connected to the mounting base. The automatic internal gear hub according to feature 11.

15. The mounting base has a slide groove with an opening at one end, and the slide groove extends along the rotational direction of the centrifugal block. The centrifugal block includes a centrifugal block body and a centrifugal block projection, the centrifugal block body being rotatably connected to the mounting base, the centrifugal block projection being connected to the centrifugal block body, and the damping member being provided offset from the centrifugal block body along the axial direction. The centrifugal block projection is located in the slide groove, and after the centrifugal block rotates due to centrifugal force, the centrifugal block projection is able to slide out from the opening in the slide groove. The damping member is located correspondingly at the opening and is used to block the centrifugal block projection. The present invention further includes a damping member suction unit, the damping member suction unit being connected to the mounting base and located near the opening, and the damping member suction unit being used to suction the damping member so that the damping member is in its initial position. In the first state, the centrifugal block projection is located near the opening, and the damping member adsorption unit is further used to adsorb the centrifugal block projection. The automatic internal gear hub according to feature 14.

16. The system further includes a centrifugal block adsorption unit, the centrifugal block adsorption unit being connected to the output mechanism, and the centrifugal block adsorption unit being used to adsorb the centrifugal block such that the centrifugal block maintains the second state. The automatic internal gear hub according to feature 1.

17. A bicycle, including a frame and an automatic internal gear hub, The automatic internal gear hub is mounted on the drive wheels of the vehicle body, and the automatic internal gear hub is the automatic internal gear hub described in any one of claims 1 to 9. A bicycle characterized by the following features.

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