Hub assemblies and bicycles

Abstract

The hub assembly includes a hub axle (100), a hub (200) rotatably fitted onto the hub axle (100), a planetary gear assembly (300) attached to the hub axle (100) and disposed within the hub (200) for transmitting a driving force to the hub (200), a power input member (400) rotatably fitted onto the hub axle (100) for providing a driving force to the planetary gear assembly (300), a control assembly (500) acting on the planetary gear assembly (300) for switching a driving force transmission path, an electric shifting assembly (600) acting on the control assembly (500) to switch the driving force transmission path, and a drive motor (10) installed within the hub (200) for providing a driving force to the hub (200).

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application filed with the China Patent Office on January 19, 2022, bearing application number 202210061317.0 and entitled "Hub Assembly and Bicycle," the entire contents of which are incorporated herein by reference. [Technical field] The present application relates to the technical field of shifting gears in motor vehicles, and more particularly to hub assemblies and bicycles having such hub assemblies. [Background technology]

[0002] The derailleur is located inside the hub assembly of a bicycle, providing great convenience to cyclists. With the development of bicycle derailleurs, internal derailleurs are becoming increasingly popular among cyclists due to their many advantages, such as high efficiency, heavy-duty capacity, dustproofness, and waterproofness.

[0003] The internal bicycle transmission uses a planetary gear assembly as the transmission body and is assembled enclosed within the hub of the rear wheel axle. This overcomes the drawbacks of external transmissions and provides good transmission performance.

[0004] However, conventional bicycles generally use only a derailleur to change gears, and conventional derailleurs use a thumb shifter attached to the handlebars to control the internal derailleur, making operation relatively complicated. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above technical problems, the present application provides a hub assembly and a bicycle that, compared with the prior art, can achieve accurate and easy gear changes on a bicycle, making cycling less laborious and improving the user's cycling experience. [Means for solving the problem]

[0006] In order to solve the problems of the prior art,

[0007] According to a first aspect, the present application provides: The hub axle and a hub rotatably fitted onto the hub axle; a planetary gear assembly mounted on the hub axle and disposed within the hub for transmitting a driving force to the hub; a power input member rotatably fitted on the hub axle for providing driving force to the planetary gear assembly; a control assembly that acts on the planetary gear assembly and switches the transmission path of the driving force; an electric transmission assembly that acts on the control assembly to switch the transmission path of the driving force; a drive motor disposed within the hub for providing a driving force to the hub; A hub assembly is provided.

[0008] Preferably, the control assembly comprises: a base body attached to the hub axle; A switching member installed on the base body; and a control sleeve acting on the switching member to switch the switching member into engagement with or disengagement from the sun gear of the planetary gear assembly.

[0009] Preferably, the electronic transmission assembly comprises: a control motor; a control ring having a pushing portion and connected to the control sleeve; a transmission member that is driven by the control motor and acts on the pushing portion to rotate the control ring around the hub axle.

[0010] Preferably, the transmission member is A transmission ring; a tooth portion provided on an outer peripheral surface of the transmission ring; a worm gear structure driven by the control motor and meshing with the toothed portion; a pushing member disposed on the transmission ring and acting on the pushing portion.

[0011] Preferably, a mounting hole is provided in the transmission ring, a spring is provided in the mounting hole, and the pushing member is connected to the spring.

[0012] Preferably, the A mounting base is disposed within the hub, and an annular chamber is disposed within the mounting base; The transmission ring is inserted into the annular chamber, control Both the motor and the worm gear structure are disposed within the annular chamber.

[0013] Preferably, a hole plate mounted on the mounting base; The transmission ring further includes a positioning magnet.

[0014] Preferably, the power input member includes a freewheel mount attached to the hub axle via a first bearing, and a transmission gear attached to the freewheel mount, A mounting chamber is provided in the freewheel mount, and the hub is mounted in the mounting chamber via a second bearing.

[0015] According to a second aspect, the present application further provides a bicycle including a hub assembly according to any one of the above claims.

[0016] Compared with the prior art, the hub assembly provided by the present invention has an electric shifting assembly and a drive motor installed inside the hub. The electric shifting assembly can act on the control assembly in a timely manner to switch the driving force transmission path, allowing for simple operation to change the shift position. In addition, the drive motor can provide driving force to the hub and assist the hub's rotation, not only realizing accurate and easy gear changes on the bicycle, but also making cycling more labor-saving and improving the user's cycling experience. [Brief explanation of the drawings]

[0017] In order to more clearly explain the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art may obtain other drawings according to these drawings without making any efforts that amount to inventive step. [Figure 1] 1 is a structural schematic diagram of a hub assembly provided by an embodiment of the present invention; [Figure 2] FIG. 2 is an enlarged schematic view of a portion A in FIG. [Figure 3] 1 is a structural schematic diagram of a hub assembly provided by an embodiment of the present invention; [Figure 4] 1 is a schematic diagram of the three-dimensional structure of a hub assembly provided by an embodiment of the present invention; [Figure 5] 2 is a structural schematic diagram of a worm gear and a transmission ring according to an embodiment of the present invention; FIG. [Figure 6] 3A and 3B are structural schematic diagrams of a pressing member in an embodiment of the present invention. [Figure 7] FIG. 10 is a structural schematic diagram of the worm gear and the transmission ring according to the embodiment of the present invention from another perspective; [Figure 8] 2 is a structural schematic diagram of a mounting base according to an embodiment of the present invention; FIG. [Figure 9] 1 is a structural schematic diagram of a transmission ring according to an embodiment of the present invention; [Figure 10] FIG. 2 is a structural schematic diagram of a control ring in an embodiment of the present invention. [Figure 11] 3 is a structural schematic diagram of a base body according to an embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] In order to allow those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are described below clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative work fall within the scope of protection of the present application.

[0019] It should be noted that when an element is referred to as being "fixed" or "mounted" to another element, it can be directly on the other element or indirectly mounted to the other element, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the orientations or positional relationships indicated by the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," etc. are orientations or positional relationships shown based on the drawings, and are merely for the convenience of describing and simplifying the description of this application, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limiting this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to mean or imply relative importance or to implicitly designate the number of technical features they refer to. Accordingly, a feature qualified by "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "plurality" and "some" mean two or more than two, unless otherwise clearly and specifically limited.

[0022] Furthermore, the structures, proportions, sizes, etc. shown in the drawings of this specification are all intended to facilitate understanding and interpretation by those skilled in the art in accordance with the contents disclosed in the specification, and are not intended to limit the conditions under which this application is implemented. Therefore, they have no technically substantial meaning, and any modification of structures, changes in proportion relationships, or adjustments in size are included within the scope of the technical content disclosed in this application as long as they do not affect the effects and objectives achieved by this application.

[0023] The present embodiment is described in an incremental manner.

[0024] As shown in Figures 1 to 11, an embodiment of the present invention provides a hub assembly including a hub axle 100, a hub 200 rotatably fitted onto the hub axle 100, a planetary gear assembly 300 provided on the hub axle 100 and disposed within the hub 200 for transmitting driving force to the hub 200, a power input member 400 rotatably fitted onto the hub axle 100 for providing driving force to the planetary gear assembly 300, a control assembly 500 acting on the planetary gear assembly 300 for switching the driving force transmission path, an electric shifting assembly 600 acting on the control assembly 500 to switch the driving force transmission path, and a drive motor 10 installed within the hub 200 for providing driving force to the hub 200.

[0025] Compared with the prior art, the hub assembly provided by the present invention is equipped with an electric shifting assembly 600 and a driving motor 10. The electric shifting assembly 600 can act on the control assembly 600 in a timely manner to switch the driving force transmission path, allowing the shift position to be changed with a simple operation. The driving motor 10 can provide driving force to the hub 200 and assist the rotation of the hub 200, which not only enables accurate and easy gear changes of the bicycle, but also saves the cyclist more effort during cycling and improves the user's cycling experience.

[0026] In a preferred embodiment, a torque sensor and / or a speed sensor and / or a gyro can be installed, and the electric transmission assembly 600 or the drive motor 10 can realize automatic gear shifting of the transmission or automatic assistance of the drive motor 10 according to signals monitored by the torque sensor and / or the speed sensor and / or the gyro. By adopting this structure, the cyclist does not need to perform gear shifting operations, further improving the cycling experience of the cyclist.

[0027] In this embodiment of the invention, the hub axle 100 is fixedly mounted to the bicycle frame.

[0028] In this embodiment of the present invention, the hub 200 is rotatable relative to the hub axle 100 and can be fitted with spokes. When the hub 200 rotates, the bicycle wheel rotates, and the rotational speed of the hub 200 matches the rotational speed of the bicycle wheel.

[0029] The planetary gear assembly 300 in this embodiment includes a sun gear 310 that is rotatable around the hub axle 100, planetary gears 320 that mesh with the sun gear 310, a ring gear 330 that meshes with the planetary gears 320, and a planet carrier 340 that holds the planetary gears 320. The ring gear 330 is fixed to the hub 200. Two or more sets of planetary gear assemblies 300 are installed so that driving force can be transmitted through different paths.

[0030] In this embodiment, the power input member 400 includes a freewheel mount 410 and a freewheel 420. The freewheel 420 is fixedly attached to the freewheel mount 410, which is attached to the hub axle 100 via a first bearing 411. The freewheel 420 rotates when it receives a force, causing the freewheel mount 410 to rotate. A one-way clutch or click mechanism 430 is installed between the freewheel mount 410 and the ring gear 330. When the rotation speed of the freewheel mount 410 is higher than that of the ring gear 330, the driving force is transmitted to the ring gear 330 via the one-way clutch or click mechanism 430 via the freewheel mount 410. When the rotation speed of the freewheel mount 410 is lower than that of the ring gear 330, the driving force is not transmitted directly to the ring gear 330 via the freewheel mount 410, but is transmitted to the ring gear 330 after being shifted by the planetary gear assembly 300. The freewheel mount 410 is fixedly connected to the planet carrier 340 so that when the freewheel mount 410 rotates, it simultaneously rotates the planet carrier 340 .

[0031] In this embodiment of the present invention, a mounting chamber 412 is provided in the freewheel mount 410, and the end of the hub 200 closest to the freewheel 420 is located within the mounting chamber 412, with the hub 200 mounted within the mounting chamber 412 via a second bearing 413. With this arrangement, the engagement portions of the ring gear 330, one-way clutch or click mechanism 430, freewheel mount 410, and second bearing 413 can essentially be located on a single vertical section, significantly reducing the width of the internal derailleur, making its structure more compact, and reducing the size of the locknut on the bicycle frame.

[0032] In this embodiment of the present invention, the control assembly 500 includes a base body 510 that is attached to the hub axle 100, a switching member 520 that is mounted on the base body 510, and a control sleeve 530 that acts on the switching member 520 to switch the switching member 520 between an engaged state and a disengaged state with the sun gear 310 of the planetary gear assembly 300.

[0033] The base body 510 is provided with a first groove and a second groove. One end of the switching member 520 is placed in the first groove. Due to the action of the torsion spring, the other end of the switching member 520 engages with the inner surface of the sun gear 310, locking the sun gear 310 and preventing it from rotating. When the control sleeve 530 rotates, it acts on the switching member 520 and presses the other end of the switching member 520 into the second groove. In this case, the switching member 520 and the sun gear 310 are in a disengaged state, allowing the sun gear 310 to rotate. There are multiple switching members 520, the number of which matches the number of sun gears. As the control sleeve 530 rotates, the multiple switching members 520 are switched between an engaged state and a disengaged state.

[0034] The base body 510 may be fixed to the hub axle 100 by a key or flat position method, so that the base body 510 does not rotate relative to the hub axle 100.

[0035] The electric shifting assembly 600 in this embodiment of the present invention includes an attached control motor 610, a control ring 620 having a pushing portion 621 and connected to the control sleeve 530, and a transmission member 630 that is moved by the control motor 610 and acts on the pushing portion 621 to rotate the control ring 620 around the hub axle 100.

[0036] When a signal monitored by the torque sensor and / or speed sensor and / or gyro is transmitted to the control motor 610, the control motor 610 operates and acts on the transmission member 630, which in turn acts on the pushing portion 621 via the transmission member 630, thereby rotating the control ring 620. Since the control ring 620 is connected to the control sleeve 530, the control sleeve 530 rotates, switching the state of the switching member 520 and thereby changing the transmission path of the driving force.

[0037] Preferably, the transmission member 630 includes a transmission ring 631, a tooth portion 632 installed on the outer surface of the transmission ring 631, a worm gear structure 633 driven by the control motor 610 and meshing with the tooth portion 632, and a pushing member 634 installed on the transmission ring 631 and acting on the pushing portion 621.

[0038] The control motor 610 acts on the tooth portion 632 by moving the worm gear structure 633, and the tooth portion 632 meshes with the worm gear structure 633, causing the transmission ring 631 to rotate. As a result, the pushing member 634 pushes the pushing portion 621, causing the control ring 620 to rotate, and thereby causing the control sleeve 530 to rotate.

[0039] Preferably, a mounting hole 635 is provided in the transmission ring 631, a spring 636 is provided in the mounting hole 635, and the pushing member 634 is connected to the spring 636. One end of the pushing member 634 contacts the spring 636, and the other end contacts the pushing portion 621, so that the spring 636 is in a compressed state. By providing the spring 636, a buffer is provided between the transmission ring 631 and the pushing portion 621. control It can provide protection for the motor.

[0040] The hub assembly provided by the embodiment of the present invention further includes a mounting base 640 mounted on the hub axle 100 , and the electric shifting assembly 600 is mounted on the mounting base 640 .

[0041] Specifically, the mounting base 640 is installed in an annular chamber 641, the transmission ring 632 is inserted into the annular chamber 641, and the control motor 610 and worm gear structure 633 are both located within the annular chamber 641. This structure saves space in the axial direction of the hub assembly, making the width of the hub assembly more reasonable and reducing the size of the locknut on the bicycle frame.

[0042] The hub assembly provided by the embodiment of the present invention further includes a hole plate 642 mounted on the mounting base 640 and a positioning magnet 643 installed on the transmission ring 631. When shifting, the transmission ring 631 rotates, and the positioning magnet 643 on the transmission ring 631 rotates accordingly, and after rotating to the desired position, the hole plate 642 corresponds to the positioning magnet 643, thus ensuring more accurate shifting.

[0043] An embodiment of the present invention further provides a bicycle including the hub assembly described in any one of the above claims.

[0044] The above description of the disclosed embodiments will enable those skilled in the art to make or use the present invention. Various modifications to these embodiments will be 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 present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0045] 10···Drive motor; 100···hub axle; 200···hub; 300···Planetary gear assembly; 310···Sun gear; 320···planetary gear; 330···Ring gear; 340···Planet carrier; 400···Power input member; 410···Freewheel mount; 411···First bearing; 412···Dressing Room; 413···Second bearing; 420···freewheel; 430···One-way clutch or click mechanism; 500···Control assembly; 510···Base body; 520···Switching member; 530···Control sleeve; 600···Electronic shifting assembly; 610···Control motor; 620···Control ring; 621···Pushing part; 630···Transmission member; 631···Transmission ring; 632···Tooth section; 633···Worm gear structure; 634···Pushing member; 635···Mounting hole; 636···Spring; 640···Mounting base; 641···Annular chamber; 642···Hole plate; 643···Positioning magnet.

Claims

1. A hub assembly, The hub axle and a hub rotatably fitted onto the hub axle; a planetary gear assembly mounted on the hub axle and disposed within the hub for transmitting a driving force to the hub; a power input member rotatably fitted on the hub axle for providing driving force to the planetary gear assembly; a control assembly that acts on the planetary gear assembly and switches the transmission path of the driving force; an electric transmission assembly that acts on the control assembly to switch the transmission path of the driving force; a drive motor disposed within the hub for providing a driving force to the hub; the electric shifting assembly is mounted within the hub; a mounting base is disposed within the hub, an annular chamber is disposed within the mounting base, and the electric transmission assembly is disposed within the annular chamber; A hub assembly characterized by:

2. The control assembly includes: a base body attached to the hub axle; A switching member installed on the base body; a control sleeve acting on the switching member to switch the switching member between engagement and disengagement with the sun gear of the planetary gear assembly.

2. The hub assembly according to claim 1.

3. The electric transmission assembly includes: a control motor; a control ring having a pushing portion and connected to the control sleeve; a transmission member that is driven by the control motor and acts on the pushing portion to rotate the control ring around the hub axle.

3. The hub assembly according to claim 2.

4. The transmission member is A transmission ring; a tooth portion provided on an outer peripheral surface of the transmission ring; a worm gear structure driven by the control motor and meshing with the toothed portion; a pushing member that is installed on the transmission ring and acts on the pushing portion, 4. The hub assembly according to claim 3.

5. The transmission ring has a mounting hole, a spring is installed in the mounting hole, and the pushing member is connected to the spring.

5. The hub assembly according to claim 4.

6. a mounting base disposed within the hub, and an annular chamber disposed within the mounting base; The transmission ring is inserted into the annular chamber, and the control motor and the worm gear structure are both disposed within the annular chamber.

6. A hub assembly according to claim 4 or 5.

7. a hole plate mounted on the mounting base; and a positioning magnet installed on the transmission ring.

7. The hub assembly according to claim 6.

8. the power input member includes a freewheel mount attached to the hub axle via a first bearing, and a transmission gear attached to the freewheel mount, A mounting chamber is provided in the freewheel mount, and the hub is mounted in the mounting chamber via a second bearing.

6. A hub assembly according to claim 1, wherein the hub assembly comprises:

9. A bicycle employing the hub assembly according to any one of claims 1 to 5. A bicycle characterized by:

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