An automatic internal transmission and hub assembly

Abstract

This application discloses an automatic internal transmission, comprising: a hub shaft; a hub rotatably mounted on the hub shaft; a planetary gear assembly disposed on the hub shaft and within the hub for transmitting driving force to the hub; a one-way clutch disposed between the planetary gear assembly and the hub; a power input component rotatably mounted on the hub shaft for providing driving force to the planetary gear assembly; a control ring acting on the one-way clutch; a centrifugal block connected to the hub and the control ring, the centrifugal block having a rotational state relative to the hub, thereby driving the control ring to rotate, so that the driving force transmitted by the planetary gear assembly is transmitted to the hub via the one-way clutch; and a holding component disposed on the hub to maintain the state of the centrifugal block and / or the control ring after rotation. Compared with the prior art, the automatic internal transmission and hub assembly provided by this application can maintain the gear position for a period of time when the vehicle speed decreases, improving the user's riding experience.

Description

Technical Field

[0001] This application relates to the field of vehicle transmission technology, and more specifically, to an automatic internal transmission, and also to a wheel hub assembly incorporating the automatic internal transmission. Background Technology

[0002] The internal derailleur of a bicycle uses a planetary gear assembly as the main transmission component and is enclosed within the hub of the rear wheel axle. It overcomes the shortcomings of external derailleurs and provides better transmission performance, and its application in production is becoming increasingly widespread.

[0003] Later, automatic internal transmissions emerged, capable of automatically changing gears according to vehicle speed, improving the user experience. Existing automatic internal transmissions are equipped with centrifugal blocks. The rotation of the wheel hub or planetary gear assembly causes the centrifugal blocks to rotate under centrifugal force, thereby causing the centrifugal blocks to act on a one-way clutch. The driving force of the planetary gear assembly is then transmitted to the wheel hub through the one-way clutch, achieving automatic gear shifting.

[0004] However, with existing automatic internal gearboxes, after completing an automatic shift, as the vehicle speed decreases, the centrifugal weight returns to its pre-shift position. If the user continues riding, the automatic internal gearbox will re-shift, resulting in a poor riding experience for the user. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an automatic internal transmission and a wheel hub assembly, which, compared to the prior art, can maintain the gear position for a period of time when the vehicle speed decreases, thereby improving the user's riding experience.

[0006] In order to solve the problems of existing technologies,

[0007] In a first aspect, this application provides an automatic internal transmission, comprising:

[0008] Wheel hub axle;

[0009] A hub that is rotatably fitted onto the hub axle;

[0010] A planetary gear assembly disposed on the hub shaft and placed inside the hub for transmitting driving force to the hub;

[0011] A one-way clutch is provided between the planetary gear assembly and the hub;

[0012] A power input component that is rotatably mounted on the hub shaft and used to provide driving force to the planetary gear assembly;

[0013] The control ring acting on the one-way clutch;

[0014] A centrifugal block connected to the hub and the control ring, the centrifugal block having a rotational state that rotates relative to the hub and thereby drives the control ring to rotate, so that the driving force transmitted by the planetary gear assembly is transmitted to the hub via the one-way clutch;

[0015] A retaining assembly disposed on the hub to maintain the state of the centrifugal block and / or the control ring after rotation.

[0016] Preferably, the retaining component includes:

[0017] Magnetic adsorption components are installed on the inner lining of the wheel hub;

[0018] Passive adsorption element disposed on the centrifuge block.

[0019] Preferably, the retaining component includes:

[0020] Magnetic adsorption element disposed on the centrifuge block;

[0021] Passive adsorption components are installed on the inner lining of the wheel hub.

[0022] Preferably, the retaining component includes:

[0023] Magnetic adsorption components are installed on the inner lining of the wheel hub;

[0024] Passive adsorption element disposed on the control ring.

[0025] Preferably, the retaining assembly includes a spring sheet disposed on the inner liner of the hub, the spring sheet having a recess;

[0026] The centrifuge block is provided with a pressing part, so that when the centrifuge block rotates, the pressing part can press the spring piece and place it in the recess.

[0027] Preferably, the spring sheet includes a connecting portion and an elastic portion, the connecting portion is mounted on the inner liner, and the recess is disposed on the elastic portion.

[0028] Preferably, a mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base;

[0029] The retaining component includes:

[0030] A spring tab is disposed on the mounting base, and the spring tab has a recess.

[0031] The centrifuge block is provided with a pressing part, so that when the centrifuge block rotates, the pressing part can press the spring piece and place it in the recess.

[0032] Preferably, the spring includes a connecting portion and an elastic portion, the connecting portion is mounted on the mounting base, and the recess is disposed in the elastic portion.

[0033] Preferably, the centrifuge block is further provided with a spring receiving cavity for accommodating the spring.

[0034] Preferably, the retaining component includes:

[0035] Guide limiting element provided on the inner liner of the wheel hub;

[0036] The pressure-bearing component is limited by the guide limiting member;

[0037] A first compression spring acts on the guide limiting member and the pressure receiving member;

[0038] The centrifuge block is provided with a pressing groove, so that when the centrifuge block rotates, the edge of the pressing groove can press the pressure-receiving component, so that the pressure-receiving component is placed in the pressing groove.

[0039] Preferred,

[0040] The guide limiting member is provided with a guide cavity, and the first compression spring is placed in the guide cavity;

[0041] The pressure-receiving component is provided with a limiting part, and the outlet of the guide cavity is provided with a blocking part. One end of the pressure-receiving component is connected to the first compression spring, and the other end is placed at the outlet, so that the limiting part contacts the blocking part under the action of the first compression spring.

[0042] Preferred,

[0043] A mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base;

[0044] The retaining component includes:

[0045] A spring seat with a spring mounting position, hinged to the mounting base.

[0046] A second compression spring is connected at one end to the spring mounting position, and the other end of the second compression spring is connected to the centrifugal block.

[0047] Preferably, a mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base.

[0048] Preferably, the centrifuge block includes an arm and a centrifuge part connected to the arm, a mounting pin provided on the arm, a pin hole provided on the mounting base, the pin hole being sleeved on the mounting pin, and the arm being able to rotate around the mounting pin.

[0049] Preferably, a mounting groove is provided on the arm, and a connecting pin is provided on the control ring. The connecting pin is placed in the mounting groove, and the arm is rotatable relative to the connecting pin.

[0050] Secondly, this application also provides a wheel hub assembly, comprising:

[0051] The automatic internal transmission described in any one of the foregoing claims; and,

[0052] The motor is located inside the wheel hub.

[0053] Secondly, this application also provides a wheel hub assembly, comprising:

[0054] The automatic internal transmission described in any one of the foregoing claims; and,

[0055] A lock installed inside the wheel hub and capable of operating on the wheel hub.

[0056] Compared with the prior art, the automatic internal transmission provided by this invention has a holding component on the wheel hub to maintain the state of the centrifugal block and / or control ring after rotation. When the automatic internal transmission completes automatic shifting, even if the vehicle speed decreases, the holding component can maintain the state of the centrifugal block and / or control ring after rotation. This allows the driving force of the planetary gear assembly to be transmitted to the wheel hub through a one-way clutch (i.e., maintaining the gear position). When the vehicle speed continues to decrease to a certain speed, the centrifugal block returns to the position before automatic shifting. Therefore, when the vehicle speed decreases, the gear position can be maintained for a period of time, improving the user's riding experience. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of the structure of the automatic internal transmission provided in Embodiment 1 of the present invention;

[0059] Figure 2 This is a schematic diagram of the installation position of the control ring of the automatic internal transmission provided in Embodiment 1 of the present invention;

[0060] Figure 3 This is a schematic diagram of the state of the holding component in the automatic internal transmission when it is in operation, provided in Embodiment 1 of the present invention;

[0061] Figure 4 for Figure 3Enlarged view of point A in the middle;

[0062] Figure 5 This is a schematic diagram of the mounting base in Embodiment 1 of the present invention;

[0063] Figure 6 This is a schematic diagram of the centrifuge block in Embodiment 1 of the present invention;

[0064] Figure 7 This is a schematic diagram of the structure of the magnetic adsorption component on the inner liner in Embodiment 1 of the present invention;

[0065] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0066] Figure 9 This is a schematic diagram of the control loop structure in Embodiment 1 of the present invention;

[0067] Figure 10 This is a three-dimensional schematic diagram of the mounting components in Embodiment 2 of the present invention;

[0068] Figure 11 This is a schematic diagram showing the state of the component when it is in operation according to Embodiment 2 of the present invention;

[0069] Figure 12 This is a schematic diagram of the retaining component structure in Embodiment 3 of the present invention;

[0070] Figure 13 This is a schematic diagram of the state when the component is not working in Embodiment 4 of the present invention;

[0071] Figure 14 This is a schematic diagram of the state of the component when it is in operation according to Embodiment 4 of the present invention;

[0072] Figure 15 This is a schematic diagram of the spring seat in Embodiment 4 of the present invention;

[0073] Figure 16 This is a schematic diagram of the wheel hub assembly structure provided in an embodiment of the present invention.

[0074] in,

[0075] 10 automatic internal transmissions, 20 motors, 30 locks;

[0076] Wheel hub axle 100;

[0077] Wheel hub 200, inner liner 210, mounting base 220, pin hole 221, rotation notch 230;

[0078] Planetary gear assembly 300, one-way clutch 400, power input component 500;

[0079] Control ring 600, connecting pin 610;

[0080] Centrifuge block 700, arm 710, mounting pin 711, mounting groove 712, centrifuge part 720, pressing part 721, spring receiving cavity 730, pressing groove 740;

[0081] The components include: retaining component 800, spring piece 810, recess 811, connecting part 812, elastic part 813, magnetic adsorption component 820, passive adsorption component 830, guide limiting component 841, guide cavity 8411, blocking part 8412, pressure receiving component 842, limiting part 8421, first compression spring 843, spring seat 850, spring mounting position 851, and second compression spring 852. Detailed Implementation

[0082] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0083] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0084] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0086] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0087] Example 1

[0088] Please Figures 1 to 9 As shown in Figure 16, an embodiment of the present invention provides an automatic internal transmission 10, comprising: a hub shaft 100; a hub 200 rotatably mounted on the hub shaft 100; a planetary gear assembly 300 disposed on the hub shaft 100 and located within the hub 200 for transmitting driving force to the hub 200; a one-way clutch 400 disposed between the planetary gear assembly 300 and the hub 200; and a power transmission mechanism rotatably mounted on the hub shaft 100 for providing driving force to the planetary gear assembly 300. Insertion component 500; control ring 600 acting on one-way clutch 400; centrifugal block 700 connected to hub 200 and control ring 600, centrifugal block 700 having a rotational state relative to hub 200, thereby driving control ring 600 to rotate, so that the driving force transmitted by planetary gear assembly 300 is transmitted to hub 200 via one-way clutch 400; holding component 800 disposed on hub 200 to maintain the state of centrifugal block 700 and / or control ring 600 after rotation.

[0089] The automatic internal transmission provides rotational force through the power input component 500. This rotational force is directly transmitted to the wheel hub 200, causing it to rotate, thus rotating the bicycle wheel. As the wheel hub 200 rotates, the centrifugal block 700 rotates relative to the wheel hub 200 due to centrifugal force. During the rotation of the centrifugal block 700, it drives the control ring 600 to rotate. Since the control ring 600 acts on the one-way clutch 400, its rotation drives the one-way clutch 400, putting it in an engaged state. That is, the planetary gear assembly 300 can directly transmit the shifted driving force to the wheel hub 200 through the one-way clutch 400. During riding, as the vehicle speed (rotation speed of hub 200) decreases, the centrifugal force on centrifugal block 700 decreases. At this time, centrifugal block 700 will return to its previous position, resulting in a gear shift (taking two-speed as an example, before centrifugal block 700 rotates, it is in first gear; after centrifugal block 700 rotates, since the driving force of hub 200 comes from planetary gear assembly 300, it is in second gear; when the centrifugal force on centrifugal block 700 decreases and it returns to its starting position, it shifts to first gear). The automatic internal transmission provided in this embodiment of the invention, due to the presence of a holding component 800, can hold the centrifugal block. The centrifugal block 700 and / or control ring 600 are in the state after rotation. Therefore, even if the vehicle speed decreases, the holding component 800 can maintain the state of the centrifugal block 700 and / or control ring 600 after rotation until the preset vehicle speed. This allows the driving force of the planetary gear assembly 300 to be transmitted to the wheel hub 200 through the one-way clutch 400 (i.e., keeping the gear unchanged). When the vehicle speed continues to decrease to a certain speed, the centrifugal block 700 returns to the position before automatic transmission. Therefore, when the vehicle speed decreases, the gear can be kept unchanged for a period of time until the preset vehicle speed, without the need for frequent automatic gear switching, thus improving the user's riding experience.

[0090] In this embodiment of the invention, the centrifugal block 700 is connected to the hub 200 by means of a mounting base 220 mounted on the inner liner 210 of the hub 200, and the centrifugal block 700 hinged to the mounting base 220. The centrifugal block 700 includes an arm 710 and a centrifugal portion 720 connected to the arm 710. A mounting pin 711 is provided on the arm 710, and a pin hole 221 is provided on the mounting base 220. The pin hole 221 is fitted onto the mounting pin 711, and the arm 710 is rotatable around the mounting pin 711.

[0091] When the hub 200 rotates, since the mounting seat 220 is mounted on the inner liner 210 of the hub 200, the mounting seat 220 rotates with the hub 200, and the pin hole 221 also rotates with the hub 200. Since the arm 710 can rotate around the mounting pin 711, while the mounting seat 220 rotates with the hub 200, the centrifugal block 700 will rotate around the mounting pin 711 due to centrifugal force, causing the centrifugal part 720 to move closer to the inner liner 210 of the hub 200.

[0092] Of course, the positions of the mounting pin 711 and the pin hole 221 can be interchanged. That is, the mounting pin 711 can be set on the mounting base 220 and the pin hole 221 can be set on the arm 710.

[0093] In this embodiment of the invention, an mounting groove 712 is provided on the arm 710, and a connecting pin 610 is provided on the control ring 600. The connecting pin 610 is placed in the mounting groove 712, and the arm 710 can rotate relative to the connecting pin 610.

[0094] The mounting groove 712 is located on the arm 710 at the end away from the centrifugal part 720, and the mounting pin 711 is located between the mounting groove 712 and the centrifugal part 720. Thus, when the arm 710 rotates about the mounting pin 711, it causes the mounting groove 712 to rotate about the mounting pin 711 as well. During this rotation, the mounting groove 712 moves the connecting pin 610, thereby causing the control ring 600 to rotate. This causes the control ring 600 to act on the one-way clutch 400, engaging the one-way clutch 400.

[0095] The retaining component 800 in this embodiment of the invention includes: a magnetic adsorption member 820 disposed on the inner liner 210 of the hub 200; and a passive adsorption member 830 disposed on the centrifugal block 700. The magnetic adsorption member 820 is capable of adsorbing with the passive adsorption member 830.

[0096] When the centrifugal block 700 rotates to a preset position under centrifugal force, the one-way clutch 400 is engaged, and the power input component 500 provides rotational force, which is transmitted to the hub 200 through the planetary gear assembly 300 and the one-way clutch 400. At this time, due to the mutual attraction between the magnetic adsorption component 820 and the passive adsorption component 830, the state of the centrifugal block 700 after rotation is maintained. Even if the speed of the hub 200 decreases (the centrifugal force on the centrifugal block 700 decreases), the centrifugal block 700 will not immediately return to the starting position of rotation.

[0097] Of course, the positions of the magnetic adsorption component 820 and the passive adsorption component 830 can be interchanged. That is, the magnetic adsorption component 820 is set on the centrifugal block 700, and the passive adsorption component 830 is set on the inner liner 210 of the hub 200.

[0098] Among them, the magnetic adsorption component 820 is preferably made of a magnet, and the passive adsorption component 830 can be made of a magnet or a metal or alloy that can be adsorbed by a magnet, such as iron, cobalt, or nickel.

[0099] When the magnetic adsorption component 820 is placed on the centrifuge block 700, a magnet mounting hole is provided on the arm 710, and the magnet is installed in the magnet mounting hole. When the centrifuge block 700 rotates to the position where the shift is successful, the magnet comes into contact with the passive adsorption component 830, and the two are attracted to each other, which helps to hold the centrifuge block 700.

[0100] The retaining component 800 in this embodiment of the invention can also adopt the following structure, which includes: a magnetic adsorption component 820 disposed on the inner liner 210 of the hub 200; and a passive adsorption component 830 disposed on the control ring 600. Specifically, a rotating area is provided on the inner liner 210 of the hub 200, wherein the rotating area is a rotating notch 230 disposed in the circumferential direction of the inner liner 210, the magnetic adsorption component 820 is disposed on the side wall of the rotating notch 230, and the passive adsorption component 830 is an adsorption plate disposed on the control ring 600 that is substantially parallel to the side wall of the rotating notch 230. The adsorption plate can rotate within the rotating notch 230 as the control ring 600 rotates. During the automatic transmission shifting process, the rotation angle of the control ring 600 is small, and the displacement of the adsorption plate within the rotating notch 230 is small. Since the magnetic adsorption force is small and can only have an adsorption effect within a certain distance, this structure can ensure that the adsorption plate is always in the magnetic adsorption area, the magnetic adsorption force has good linearity, and further ensures the stability of gear holding.

[0101] Example 2

[0102] Please Figure 10 , Figure 11 As shown, the difference between this embodiment and Embodiment 1 is that the structure of component 800 is different.

[0103] In this embodiment of the invention, the retaining component 800 includes a spring piece 810 disposed on the inner liner 210 of the hub 200, and a recess 811 disposed on the spring piece 810; a pressing part 721 is disposed on the centrifugal block 700 so that when the centrifugal block 700 rotates, the pressing part 721 can press the spring piece 810 and be placed in the recess 811.

[0104] The spring sheet 810 in this embodiment of the invention includes a connecting portion 812 and an elastic portion 813. The connecting portion 812 is mounted on the inner liner 210, and the recess 811 is disposed on the elastic portion 813. A spring sheet receiving cavity 730 for accommodating the spring sheet 810 is provided on the centrifugal block 700.

[0105] When the hub 200 rotates, the centrifugal block 700 rotates around the mounting pin 711 under centrifugal force. During the rotation, the centrifugal part 720 moves closer to the inner liner 210. During this process, the pressing part 721 on the centrifugal part 720 first contacts the elastic part 813 on the spring 810. As the centrifugal block 700 continues to rotate, the end of the elastic part 813 begins to enter the spring receiving cavity 730. The pressing part 721 continues to press the elastic part 813 until the pressing part 721 slides into the recess 811. At this time, the centrifugal block 700 rotates into place and the gear shift is successful. When the speed of the hub 200 decreases, the centrifugal force on the centrifugal block 700 decreases. At this time, the centrifugal block 700 tends to return to the starting position before gear shifting. Since the pressing part 721 on the centrifugal block 700 is located in the recess 811 on the elastic part 813, the centrifugal block 700 will not immediately return to the starting position before gear shifting. When the speed of the hub 200 decreases to a certain value, that is, when the centrifugal force on the centrifugal block 700 decreases to a certain value, the pressing part 721 will overcome the elastic force of the elastic part 813 and return to the starting position before gear shifting.

[0106] By using the holding component 800 provided in this embodiment of the invention, the gear can be kept unchanged for a period of time until the preset speed is reached when the vehicle speed decreases, without the need for frequent automatic gear switching, thus improving the user's riding experience.

[0107] Example 3

[0108] Please Figure 12 As shown, the difference between this embodiment and Embodiment 1 is that the structure of component 800 is different.

[0109] The retaining component 800 in this embodiment of the invention includes: a guide limiting member 841 disposed on the inner liner 210 of the hub 200; a pressure receiving member 842 limited by the guide limiting member 841; a first compression spring 843 acting on the guide limiting member 841 and the pressure receiving member 842; and a pressing groove 740 disposed on the centrifugal block 700 so that when the centrifugal block 700 rotates, the edge of the pressing groove 740 can press the pressure receiving member 842, so that the pressure receiving member 842 is placed in the pressing groove 740.

[0110] The guide limiting member 841 is provided with a guide cavity 8411, and the first compression spring 843 is placed inside the guide cavity 8411; the pressure receiving member 842 is provided with a limiting part 8421, and a blocking part 8412 is provided at the outlet of the guide cavity 8411. One end of the pressure receiving member 842 is connected to the first compression spring 843, and the other end is placed at the outlet, so that the limiting part 8421 contacts the blocking part 8412 under the action of the first compression spring 843.

[0111] When the hub 200 rotates, the centrifugal block 700 rotates around the mounting pin 711 under centrifugal force. During the rotation, the centrifugal part 720 moves closer to the inner liner 210. During this process, the edge of the pressing groove 740 presses the pressure receiving part 842, and the pressure receiving part 842 retracts to press the first compression spring 843, causing the first compression spring 843 to compress. As the centrifugal block 700 continues to rotate, the pressure receiving part 842 continues to retract until the pressure receiving part 842 slides into the pressing groove 740. At this time, the centrifugal block 700 rotates into place, and the gear shift is successful. When the speed of the hub 200 decreases, the centrifugal force on the centrifugal block 700 decreases. At this time, the centrifugal block 700 tends to return to the starting position before the gear shift. Since the pressure member 842 is in the pressing groove 740, the centrifugal block 700 will not immediately return to the starting position before the gear shift. When the speed of the hub 200 decreases to a certain value, that is, when the centrifugal force on the centrifugal block 700 decreases to a certain value, the edge of the pressing groove 740 presses the pressure member 842 again. The pressure member 842 retracts and presses the first compression spring 843, causing the pressure member 842 to slide out of the pressing groove 740, thereby causing the centrifugal block 700 to return to the starting position before the gear shift.

[0112] By using the holding component 800 provided in this embodiment of the invention, the gear can be kept unchanged for a period of time until the preset speed is reached when the vehicle speed decreases, without the need for frequent automatic gear switching, thus improving the user's riding experience.

[0113] Example 4

[0114] Please Figures 13 to 15 As shown, the difference between this embodiment and Embodiment 1 is that the structure of component 800 is different.

[0115] The retaining component 800 in this embodiment of the invention includes: a spring seat 850 with a spring mounting position 851 hinged to the mounting base 220; a second compression spring 852 with one end connected to the spring mounting position 851; and the other end of the second compression spring 852 connected to the centrifugal block 700.

[0116] Specifically, the spring mounting position 851 is a first spring mounting pin set on the spring seat 850, and the second compression spring 852 is sleeved on the first spring mounting pin. A second spring mounting pin is set on the centrifugal block 700, and the other end of the second compression spring 852 is sleeved on the second spring mounting pin, and the second compression spring 852 is always in a compressed state.

[0117] When the hub 200 rotates, the centrifugal block 700 rotates around the mounting pin 711 under centrifugal force. During the rotation, the centrifugal part 720 moves closer to the inner liner 210, and the spring seat 850 also rotates relative to the mounting seat 220. During this process, the centrifugal part 720 is always subjected to the force of the second compression spring 852. As the centrifugal block 700 continues to rotate until the centrifugal block 700 rotates to the position and successfully shifts gears, the centrifugal block 700 is also continuously subjected to the force provided by the second compression spring 852 to maintain the position of the centrifugal block 700 after successfully shifting gears. When the speed of hub 200 decreases, the centrifugal force on centrifugal block 700 decreases. At this time, centrifugal block 700 tends to return to the starting position before gear shift. Since centrifugal block 700 is continuously subjected to the force provided by the second compression spring 852, centrifugal block 700 will not immediately return to the starting position before gear shift. When the speed of hub 200 decreases to a certain value, that is, when the centrifugal force on centrifugal block 700 decreases to a certain value, centrifugal block 700 overcomes the force given by the second compression spring 852 and thus returns to the starting position before gear shift.

[0118] By using the holding component 800 provided in this embodiment of the invention, the gear can be kept unchanged for a period of time until the preset speed is reached when the vehicle speed decreases, without the need for frequent automatic gear switching, thus improving the user's riding experience.

[0119] Please Figure 16 As shown, embodiments of the present invention also provide a wheel hub assembly, including: an automatic internal transmission provided in any of the above embodiments; and a motor 20 disposed in the wheel hub 200 or a lock 30 capable of acting on the wheel hub.

[0120] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic internal transmission, characterized in that, include: Wheel hub axle; A hub that is rotatably fitted onto the hub axle; A planetary gear assembly disposed on the hub shaft and placed inside the hub for transmitting driving force to the hub; A one-way clutch is provided between the planetary gear assembly and the hub; A power input component that is rotatably mounted on the hub shaft and used to provide driving force to the planetary gear assembly; The control ring acting on the one-way clutch; A centrifugal block connected to the hub and the control ring, the centrifugal block having a rotational state that rotates relative to the hub and thereby drives the control ring to rotate, so that the driving force transmitted by the planetary gear assembly is transmitted to the hub via the one-way clutch; A retaining assembly disposed on the hub to maintain the state of the centrifugal block and / or the control ring after rotation.

2. The automatic internal transmission according to claim 1, characterized in that, The retaining component includes: Magnetic adsorption components are installed on the inner lining of the wheel hub; Passive adsorption element disposed on the centrifuge block.

3. The automatic internal transmission according to claim 1, characterized in that, The retaining component includes: Magnetic adsorption element disposed on the centrifuge block; Passive adsorption components are installed on the inner lining of the wheel hub.

4. The automatic internal transmission according to claim 1, characterized in that, The retaining component includes: Magnetic adsorption components are installed on the inner lining of the wheel hub; Passive adsorption element disposed on the control ring.

5. The automatic internal transmission according to claim 1, characterized in that, The retaining assembly includes a spring sheet disposed on the inner liner of the hub, and the spring sheet is provided with a recess; The centrifuge block is provided with a pressing part, so that when the centrifuge block rotates, the pressing part can press the spring piece and place it in the recess.

6. The automatic internal transmission according to claim 5, characterized in that, The spring sheet includes a connecting part and an elastic part. The connecting part is mounted on the inner liner, and the recess is disposed on the elastic part.

7. The automatic internal transmission according to claim 1, characterized in that, A mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base; The retaining component includes: A spring tab is disposed on the mounting base, and the spring tab has a recess. The centrifuge block is provided with a pressing part, so that when the centrifuge block rotates, the pressing part can press the spring piece and place it in the recess.

8. The automatic internal transmission according to claim 7, characterized in that, The spring includes a connecting part and an elastic part. The connecting part is mounted on the mounting base, and the recess is disposed in the elastic part.

9. The automatic internal transmission according to any one of claims 5 to 8, characterized in that, The centrifuge block is also provided with a spring receiving cavity for accommodating the spring.

10. The automatic internal transmission according to claim 1, characterized in that, The retaining component includes: Guide limiting element provided on the inner liner of the wheel hub; The pressure-bearing component is limited by the guide limiting member; A first compression spring acts on the guide limiting member and the pressure receiving member; The centrifuge block is provided with a pressing groove, so that when the centrifuge block rotates, the edge of the pressing groove can press the pressure-receiving component, so that the pressure-receiving component is placed in the pressing groove.

11. The automatic internal transmission according to claim 10, characterized in that, The guide limiting member is provided with a guide cavity, and the first compression spring is placed in the guide cavity; The pressure-receiving component is provided with a limiting part, and the outlet of the guide cavity is provided with a blocking part. One end of the pressure-receiving component is connected to the first compression spring, and the other end is placed at the outlet, so that the limiting part contacts the blocking part under the action of the first compression spring.

12. The automatic internal transmission according to claim 1, characterized in that, A mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base; The retaining component includes: A spring seat with a spring mounting position, hinged to the mounting base. A second compression spring is connected at one end to the spring mounting position, and the other end of the second compression spring is connected to the centrifugal block.

13. The automatic internal transmission according to any one of claims 1 to 6, 10, and 11, characterized in that, A mounting base is installed on the inner liner of the hub, and the centrifugal block is hinged to the mounting base.

14. The automatic internal transmission according to claim 13, characterized in that, The centrifuge block includes an arm and a centrifuge part connected to the arm, a mounting pin provided on the arm, a pin hole provided on the mounting base, the pin hole being sleeved on the mounting pin, and the arm being able to rotate around the mounting pin.

15. The automatic internal transmission according to claim 14, characterized in that, A mounting groove is provided on the arm, and a connecting pin is provided on the control ring. The connecting pin is placed in the mounting groove, and the arm can rotate relative to the connecting pin.

16. A wheel hub assembly, characterized in that, include: The automatic internal transmission according to any one of claims 1 to 15; A motor or a lock that can act on the wheel hub is installed inside the wheel hub.

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