Hub device and bicycle

Abstract

The utility model provides a hub device and a bicycle. The hub device comprises a connecting shaft, a tower footing assembly, a hub assembly and a one-way locking assembly. The connecting shaft comprises two sections which are oppositely arranged. The tower footing assembly is rotationally connected to one section of the connecting shaft and used for inputting power. The hub assembly is rotationally connected to the other section of the connecting shaft and used for outputting power. The one-way locking assembly is arranged between the tower footing assembly and the hub assembly and is in transmission connection with the tower footing assembly and the hub assembly. The one-way locking assembly comprises a fixing part, and the fixing part is connected to the hub assembly. One end of the fixing part corresponds to the tower footing assembly and is in rolling connection with the tower footing assembly. The hub device provided by the embodiment of the utility model has the advantages that when the tower footing assembly drives the hub assembly to rotate, the tower footing assembly and the fixing part of the one-way locking assembly can roll, and compared with the implementation mode that the tower footing assembly is in contact with at least part of the one-way locking assembly in the related technology, the hub device is more convenient to use. Friction resistance can be reduced, and transmission efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, specifically to a hub device and a bicycle. Background Technology

[0002] The hub assembly is a crucial component in a bicycle wheel, connecting the spokes and transmitting power. As the drive wheel, the rear wheel hub assembly typically includes a hub shell, a freehub body, and a one-way locking mechanism. The one-way locking mechanism is located between the freehub body and the hub. When the rider pedals, the rotational power is transmitted from the drivetrain to the freehub body, and then from the freehub body to the hub via the one-way locking mechanism.

[0003] As the freehub base drives the hub to rotate, the freehub base also moves relative to at least part of the one-way locking assembly. In the relevant technology, the freehub base and the surface of at least part of the one-way locking assembly are always in contact. When the freehub base moves relative to the contacting part of the one-way locking assembly, it generates a large frictional resistance, which not only reduces the transmission efficiency, but also requires the rider to pedal harder to drive the bicycle. Utility Model Content

[0004] The embodiments of this utility model provide a hub device and a bicycle, which can improve the technical problems of low transmission efficiency and poor riding experience of hub devices in related technologies.

[0005] This application provides a hub device, comprising:

[0006] The connecting shaft consists of two segments that are positioned opposite each other.

[0007] The tower base assembly, rotatably connected to a section of the connecting shaft, is used for power input;

[0008] The hub assembly is rotatably connected to the other end of the connecting shaft and is used to output power;

[0009] A one-way locking assembly is disposed between the freehub assembly and the hub assembly, and is drivingly connected to the freehub assembly and the hub assembly;

[0010] The one-way locking assembly includes a fixing part connected to the hub assembly; one end of the fixing part is disposed corresponding to the freehub base assembly and is tumbledly connected to the freehub base assembly.

[0011] In one embodiment, the tower base assembly includes a tower base body, the tower base body including a first segment and a second segment connected to each other, and a positioning end is provided between the first segment and the second segment;

[0012] The one-way locking assembly further includes a movable part connected to the first segment. The movable part is rotatably engaged with the fixed part, and the fixed part is rotatably connected with the positioning end.

[0013] In one embodiment, the hub assembly further includes at least two rollers, which are spaced apart along the rotation direction of the hub assembly and are tactilely connected between the fixing part and the positioning end.

[0014] In one embodiment, the roller includes ball bearings or needle rollers.

[0015] In one embodiment, the maximum gap between the fixing part and the positioning end is less than the radial dimension of the roller;

[0016] The fixing part is provided with an annular groove or a recess, and the roller is rotatably disposed within the annular groove or the recess; or...

[0017] The positioning end is provided with an annular groove or a recess, and the roller is rotatably disposed within the annular groove or the recess; or...

[0018] The fixing part is provided with an annular groove, and the positioning end is provided with an annular groove or multiple recesses, and the roller is rotatably disposed within the annular groove or recesses; or...

[0019] The fixing part is provided with a recess, the positioning end is provided with an annular groove, and the roller is rolled within the annular groove and the recess.

[0020] In one embodiment, the tower base assembly further includes a flange connected to the tower base body for forming at least part of the positioning end;

[0021] The flange has a first through hole, which is used to inject lubricating medium between the fixing part and the positioning end.

[0022] In one embodiment, the first segment has an external thread, the movable part has an internal thread, and the movable part is screwed onto the first segment.

[0023] In one embodiment, the movable part includes a mounting frame and a rolling element. The mounting frame is connected to the tower base. The mounting frame has a ramp, and a groove is formed between the ramp and the fixed part. The groove gradually narrows from one end to the other. The rolling element is movably disposed in the groove and maintains contact with the mounting frame and the fixed part.

[0024] In one embodiment, the movable part further includes a limiting edge, and each side of the roller slope is provided with a limiting edge. At least one of the limiting edges is provided with a second through hole, which communicates with the roller groove and is used to inject a lubricating medium.

[0025] This application also provides a bicycle, including:

[0026] Frame;

[0027] The front wheel is rotatably mounted on the front side of the frame;

[0028] The rear wheel is rotatably mounted on the rear side of the frame; the rear wheel includes the hub device described in any embodiment of this application, and the hub device is located at the center of the rear wheel.

[0029] The beneficial effects of the embodiments of this utility model are as follows: The hub device provided in this application provides a rolling connection between one end of the one-way locking component and the freehub component. The advantage is that when the freehub component drives the hub component to rotate, the freehub component and the fixed part of the one-way locking component can roll. Compared with the related art, where the freehub component is in contact with at least part of the one-way locking component, this can reduce frictional resistance and improve transmission efficiency and riding experience. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an exploded schematic diagram of the hub device provided in the embodiments of this application;

[0032] Figure 2 This is a cross-sectional schematic diagram of the hub device provided in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the structure of the tower base component provided in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram showing the connection between the fixing part and the positioning end in an embodiment of this application;

[0035] Figure 5 This is an exploded view of the one-way locking component provided in the embodiments of this application;

[0036] Figure 6 This is a cross-sectional schematic diagram of the one-way locking member provided in the embodiments of this application;

[0037] Figure 7 This is a schematic diagram of the structure of the one-way locking member provided in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Hub assembly;

[0040] 10. Tower base assembly; 11. Tower base shell; 111. Tower base body; 1111. First section; 1112. Second section; 112. Positioning end; 113. Flange; 1131. First through hole; 1132. Weight reduction groove; 12. First bearing;

[0041] 20. Hub assembly; 21. Hub shell; 210. Receiving cavity; 22. Second bearing;

[0042] 30. One-way locking assembly; 31. Fixing part; 311. Outer ring; 312. Inner ring; 32. Moving part; 320. Groove; 321. Mounting bracket; 3211. Roller ramp; 322. Rolling element; 323. Limiting edge; 3230. Second through hole; 324. Sliding element; 3240. Mounting space; 3241. Mating surface; 325. Elastic element;

[0043] 40. Roller; 50. Connecting shaft; 60. Limiting side cover. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0045] The hub assembly is a crucial component in a bicycle wheel, connecting the spokes and transmitting power. As the drive wheel, the rear wheel hub assembly typically includes a hub shell, a freehub body, and a one-way locking mechanism. The one-way locking mechanism is located between the freehub body and the hub. When the rider pedals, the rotational power is transmitted from the drivetrain to the freehub body, and then from the freehub body to the hub via the one-way locking mechanism.

[0046] As the freehub base drives the hub to rotate, the freehub base also moves relative to at least part of the one-way locking assembly. In the relevant technology, the freehub base and the surface of at least part of the one-way locking assembly are always in contact. When the freehub base moves relative to the contacting part of the one-way locking assembly, it generates a large frictional resistance, which not only reduces the transmission efficiency, but also requires the rider to pedal harder to drive the bicycle.

[0047] Based on the technical problems existing in the hub device in related technologies, this application provides a hub device that can improve the low transmission efficiency and poor riding experience of the hub device.

[0048] Please see Figure 1 and Figure 2 , Figure 1 This is an exploded schematic diagram of the hub device provided in the embodiments of this application. Figure 2 This is a cross-sectional schematic diagram of the hub device provided in the embodiments of this application.

[0049] The hub device 1 provided in this application embodiment may include a base assembly 10, a hub assembly 20, a one-way locking assembly 30, and a connecting shaft 50.

[0050] The freehub base assembly 10 is used for power input. The hub assembly 20 is used for power output. A one-way locking assembly 30 is located between the freehub base assembly 10 and the hub assembly 20, providing a drive connection between them.

[0051] The one-way locking assembly 30 may include a fixing part 31, which is connected to the hub assembly 20.

[0052] One end of the fixing part 31 is provided corresponding to the tower base assembly 10 and is rolledly connected to the tower base assembly 10.

[0053] The connecting shaft 50 positions and connects the tower base assembly 10 and the hub assembly 20.

[0054] The connecting shaft 50 may include two sections arranged opposite to each other, with the base assembly 10 rotatably connected to one section of the connecting shaft 50 and the hub assembly 20 rotatably connected to the other section of the connecting shaft 50.

[0055] In practical use, the freewheel assembly 10 is used to connect to the freewheel and input the power from the rider's pedaling. The hub assembly 20 is used to connect the spokes, supporting the rim and outputting power outwards.

[0056] For example, when the freehub base assembly 10 rotates in the first rotation direction, the freehub base assembly 10 is connected to the fixed part 31 through a transmission connection, i.e., the one-way locking assembly 30 is locked, allowing the freehub base assembly 10 to drive the hub assembly 20 to rotate through the one-way locking assembly 30, thereby causing the wheel to rotate. When the freehub base assembly 10 rotates in the second rotation direction, the freehub base assembly 10 rotates relative to the fixed part 31, i.e., the freehub base assembly 10 spins freely, the one-way locking assembly 30 is not locked, and the freehub base assembly 10 cannot drive the hub assembly 20 to rotate. The first and second rotation directions are two opposite rotation directions of the freehub base assembly 10.

[0057] The hub device 1 provided in this application embodiment has the advantage of setting a rolling connection between the one-way locking component 30 and the freehub assembly 10 at one end of the freehub assembly 10. When the freehub assembly 10 drives the hub assembly 20 to rotate, the freehub assembly 10 and the fixing part 31 of the one-way locking component 30 can roll. Compared with the related art implementation in which the freehub assembly 10 is in contact with at least part of the one-way locking component 30, it can reduce frictional resistance and improve transmission efficiency and riding experience.

[0058] Please see Figure 2 and Figure 3 , Figure 3 This is a schematic diagram of the structure of the tower base assembly provided in an embodiment of this application. The tower base assembly 10 may include a tower base shell 11, and the tower base shell 11 may include a tower base body 111.

[0059] For example, the tower body 111 may include a first segment 1111 and a second segment 1112 connected to each other. The first segment 1111 is a part close to the hub assembly 20, and correspondingly, the second segment 1112 is another part away from the hub assembly 20. A positioning end 112 is provided between the first segment 1111 and the second segment 1112.

[0060] The one-way locking assembly 30 also includes a movable part 32, which is connected to the first segment 1111. Specifically, the tower base body 111 can be a hollow shell, and the movable part 32 has an assembly opening. The movable part 32 is fitted onto the first segment 1111 and is positioned towards the positioning end 112. In one embodiment, the outer side of the first segment 1111 may be provided with a spline, and the inner side of the movable part 32 (i.e., the side facing the assembly opening) may be provided with a spline groove. The movable part 32 is fitted onto the first segment 1111, and the spline and spline groove cooperate to limit the movable part 32 to rotate circumferentially relative to the tower base shell 11, thereby enabling the tower base assembly 10 to drive the movable part 32 to perform transmission movement.

[0061] In one embodiment, the first segment 1111 may have external threads, and the movable part 32 may have internal threads. The movable part 32 is screwed onto the first segment 1111, which also limits the circumferential rotation of the movable part 32 relative to the tower base shell 11. In this embodiment, since there is no uneven thickness between the tower base shell 11 and the movable part 32 due to the provision of splines or spline grooves, it can effectively avoid cracking caused by uneven stress in cases where heat treatment is required for the tower base shell 11 and the movable part 32 in some embodiments, thereby improving the structural strength.

[0062] Please see Figure 2 and Figure 4 , Figure 4 This is a schematic diagram showing the connection between the fixing part and the positioning end in an embodiment of this application. The movable part 32 and the fixing part 31 are rotatably engaged, and the fixing part 31 can be rotatably connected to the positioning end 112.

[0063] The hub assembly 1 may further include rollers 40, and at least two rollers 40 may be provided. The rollers 40 may be ball bearings or needle rollers. The rollers 40 are disposed between the fixed part 31 and the positioning end 112. Two or more rollers 40 are spaced apart along the rotation direction of the hub base assembly 10. In some embodiments, the rollers 40 may be spaced using a cage (not shown) to avoid rolling friction between adjacent rollers 40.

[0064] In some embodiments, the balls can be ceramic balls. Compared to balls made of other materials, one advantage of using ceramic balls is that they have better self-lubricating properties, maintaining a better lubrication state during friction and reducing the frictional resistance between the fixed part and the positioning end. Another advantage is that they have better surface finish, achieving higher precision during processing, reducing surface roughness, and making the actual contact area between the ball and the contact surface smaller when rolling, thereby reducing friction.

[0065] like Figure 4 The fixing part 31 and / or the positioning end 112 may be provided with an assembly structure, which may be an annular groove or a plurality of discretely distributed recesses arranged along the rotation direction of the tower base assembly 10. The maximum gap between the fixing part 31 and the positioning end 112 is less than the radial dimension of the roller 40, so that the roller 40 is rolled behind the assembly structure, and the two ends of the roller in the radial direction can maintain a rolling connection between the fixing part 31 and the positioning end 112.

[0066] It should be noted that the maximum gap between the fixing part 31 and the positioning end 112 refers to the maximum assembly distance that the side of the fixing part 31 facing the positioning end 112 can achieve relative to the positioning end 112 when the fixing part 31 moves axially relative to the base assembly 10 along the connecting shaft 50 during the use of the hub assembly 1, excluding the assembly structure. The radial direction of the roller 40 refers to the diameter of the ball bearing or the diameter of the needle roller end face.

[0067] For example, in some embodiments, the fixing part 31 or the positioning end 112 may be provided with an assembly structure, and the roller 40 is rotatably disposed within the assembly structure: specifically, the fixing part 31 is provided with an annular groove or a recess, and the roller 40 is rotatably disposed within the annular groove or recess; or, the positioning end 112 is provided with an annular groove or a recess, and the roller 40 is rotatably disposed within the annular groove or a recess. Furthermore, in other embodiments, the fixing part 31 is provided with an annular groove, and the positioning end 112 is provided with an annular groove or multiple recesses, and the roller 40 is rotatably disposed within the annular groove or a recess. Alternatively, the fixing part 31 is provided with a recess, the positioning end 112 is provided with an annular groove, and the roller 40 is rotatably disposed within both the annular groove and the recess.

[0068] Please see Figure 3 The tower base shell 11 may also include a flange 113, which is provided on the tower base body 111 and can be used to form at least a partial positioning end 112.

[0069] Specifically, the flange 113 includes two end sides and a peripheral side, with the two end sides arranged opposite to each other, one end side being close to the first segment 1111, for forming at least a partial positioning end 112.

[0070] The flange 113 may have a first through hole 1131 for injecting lubricating medium between the fixing part 31 and the positioning end 112. In one embodiment, the first through hole 1131 may be correspondingly provided with a roller 40 (or assembly structure), and the roller 40 may be rolledly assembled on one end of the first through hole 1131. Understandably, the first through hole 1131 may also be provided in a region offset from the roller 40 (or assembly structure).

[0071] In practical use, the user can inject lubricating medium from the other end of the first through hole 1131 away from the roller 40. The lubricating medium can gradually seep into the gap between the fixed part 31 and the flange 113, thereby effectively reducing the rolling friction resistance between the fixed part 31 and the flange 113 and effectively improving the transmission efficiency.

[0072] In some embodiments, a weight-reducing groove 1132 is provided on one end side and / or the circumferential side of the flange 113.

[0073] For example, a weight-reducing groove 1132 may be formed on one end of the flange 113 where at least part of the positioning end 112 is formed. Alternatively, in one embodiment, a weight-reducing groove 1132 may be formed on the end of the flange 113 facing away from the positioning end 112. Alternatively, in one embodiment, a weight-reducing groove 1132 may be formed on the circumferential side of the flange 113. Alternatively, in one embodiment, weight-reducing grooves 1132 may be formed on both the end of the flange 113 where at least part of the positioning end 112 is formed. Alternatively, in one embodiment, weight-reducing grooves 1132 may be formed on both the end of the flange 113 facing away from the positioning end 112 and the circumferential side. This reduces the weight of the tower base shell 11 when the flange 113 forms at least part of the positioning end 112, which is beneficial for rapid braking or rapid start-up.

[0074] Please see Figure 1 and Figure 2 The hub assembly 20 includes a hub shell 21. A receiving cavity 210 is provided in one end of the hub shell 21 near the base assembly 10, and a fixing part 31 is assembled within this receiving cavity 210. The fixing part 31 has a through opening, and one end of the base shell 11 used for assembling a movable part 32, together with the movable part 32, is installed in the through opening so that the movable part 32 and the fixing part 31 are rotatably connected.

[0075] For example, the inner side of the hub shell 21 facing the receiving cavity 210 may be provided with a spline groove, and the outer side of the fixing part 31 may be provided with a matching spline, which fits into the spline groove. Alternatively, the inner side of the hub shell 21 may be provided with a flat keyway, and the outer side of the fixing part 31 may be provided with a protruding structure, such as a flat key, which fits into the keyway. Alternatively, in some embodiments, the inner side of the hub shell 21 may be provided with an internal thread, and the outer side of the fixing part 31 may be provided with an external thread, with the fixing part 31 screwed into the hub shell 21. Through any of the above optional designs, the fixing part 31 can be circumferentially limited within the receiving cavity 210.

[0076] Please see Figure 2 and Figure 5 , Figure 5 This is an exploded view of the one-way locking member provided in an embodiment of this application. The fixing part 31 may be made of bearing steel. In one embodiment, the fixing part 31 includes an outer ring 311 and a heat-treated inner ring 312, so that the mechanical properties of the outer ring 311 and the inner ring 312 are different. The outer ring 311 is sleeved on the inner ring 312, so that the outer ring 311 and the inner ring 312 are connected.

[0077] In this embodiment, by setting the fixing part 31 as two detachable components and heat-treating the inner ring 312, it is beneficial to improve the mechanical properties of the inner ring 312, such as hardness, wear resistance, and strength, which can reduce the wear of the inner ring 312 when the roller 40 rolls. The outer ring 311 is not heat-treated, which can maintain the good toughness and impact resistance of the outer ring 311. When the hub shell 21 is impacted by external force, the outer ring 311 can play a buffering role, absorb some energy, and prevent the one-way locking assembly 30 from breaking and being damaged due to impact force.

[0078] In some embodiments, the outer ring 311 has an internal thread, and the inner ring 312 may have an external thread, with the outer ring 311 and the inner ring 312 screwed together. In other words, both the outer ring 311 and the inner ring 312 include opposite outer and inner sides. The outer side of the outer ring 311 is adapted to fit the inner wall of the hub shell 21, the inner side of the outer ring 311 has a thread, and the outer side of the inner ring 312 has a thread. The thread on the outer side of the inner ring 312 connects with the thread on the inner side of the outer ring 311, and the inner side of the inner ring 312 is adapted to fit the movable part 32. Alternatively, the outer side of the inner ring 312 may have a key, and the inner side of the outer ring 311 may have a keyway, which can also achieve circumferential fixation between the inner and outer rings.

[0079] By setting the inner ring 312 and the outer ring 311 to be screwed together, compared with the implementation method of connecting the inner ring 312 and the outer ring 311 with a key and keyway, the uneven thickness caused by the opening of keyways in the inner and outer rings can be avoided, the formation of weak areas can be avoided, and the deformation of the inner ring 312 after heat treatment can be effectively prevented and reduced.

[0080] Please see Figure 5 and Figure 6 , Figure 6 This is a cross-sectional schematic diagram of the one-way locking member provided in an embodiment of this application. The movable part 32 may include a mounting frame 321 and a rolling element 322. The mounting frame 321 may be made of bearing steel and is connected to the tower base 111. The mounting frame 321 is provided with a ramp 3211, and a groove 320 is formed between the ramp 3211 and the fixed part 31. The groove 320 gradually narrows from one end to the other end. The rolling element 322 is movably disposed in the groove 320 and maintains contact with the mounting frame 321 and the fixed part 31.

[0081] Specifically, the mounting bracket 321 has an assembly opening and includes an inner side facing the assembly opening and an outer side away from the assembly opening. In one embodiment, the inner side of the mounting bracket 321 is threaded so that the mounting bracket 321 can be threadedly connected to the first section 1111 of the tower base 111. The outer side of the mounting bracket 321 away from the tower base 111 has a ramp 3211. When the movable part 32 is rotated and engaged with the fixed part 31, the ramp 3211 of the mounting bracket 321 and the inner side of the fixed part 31 form a groove 320. The rolling element 322 is movably disposed in the groove 320 and maintains contact with the inner side of the fixed part 31 and the ramp 3211 of the mounting bracket 321.

[0082] This manual uses the example of a rider riding a bicycle on a level surface to illustrate the working principle of the hub assembly 1. When the rider needs to propel the bicycle forward, pedaling causes the chainring to rotate, which in turn causes the freehub assembly 10 to rotate. The freehub assembly 10 then causes the mounting bracket 321 to rotate relative to the fixed part 31. Since the rolling element 322 is in contact with the fixed part 31 and the mounting bracket 321, when the mounting bracket 321 rotates relative to the fixed part 31, it allows the rolling element 322 to move into the narrow space within the groove 320 until the rolling element 322 is locked between the groove 321 and the inner side of the fixed part 31. From this point on, the power input from the freehub assembly 10 can be transmitted to the hub assembly 20 through the rolling element 322, thereby causing the rear wheel of the bicycle to rotate.

[0083] like Figure 5 The movable part 32 may further include limiting edges 323. Each side of the ramp 3211 has a limiting edge 323, which restricts the movement direction of the rolling element 322 to prevent it from moving outwards from the ramp 3211. For example, one limiting edge 323 may be connected to one side of the mounting bracket 321, and the other limiting edge 323 may be connected to one side of the inner side of the fixed part 31; or, both limiting edges 323 may be connected to the mounting bracket 321, with the two limiting edges 323 facing each other on both sides of the ramp 3211; or, both limiting edges 323 may be connected to the fixed part 31, with the two limiting edges 323 facing each other on both sides of the inner side of the fixed part 31. Through any of the above embodiments, the rolling element 322 can be effectively prevented from rolling out of the ramp 3211, ensuring a rolling connection between the fixed part 31 and the movable part 32.

[0084] Please see Figure 6 and Figure 7 , Figure 7This is a schematic diagram of the structure of a one-way locking member provided in an embodiment of this application. In one embodiment, at least one limiting edge 323 may have a second through hole 3230, which connects to the rolling groove 320. For example, a through hole may be formed in one of the limiting edges 323, or through holes may be formed in both limiting edges 323, so that a lubricating medium can be added through the second through hole 3230. The lubricating medium seeps into the rolling groove 320 to lubricate the two relatively moving parts and reduce rolling friction.

[0085] Please continue reading. Figure 5 and Figure 6 In one embodiment, the movable part 32 may further include a slider 324 and an elastic member 325. The slider 324 may be made of brass or other suitable materials. Compared to sliders made of other materials, one advantage of using brass for the slider 324 is that it provides better wear resistance. Another advantage is that brass itself has a certain self-lubricating property, which can reduce the frictional resistance of the slider 324 when sliding relative to the roll ramp. The slider 324 is movably disposed in the groove 320. The slider 324 has a mating surface 3241 for adapting to the rolling element 322. The rolling element 322 is adapted to the mating surface 3241. The elastic member 325 connects the slider 324 and the mounting bracket 321 so that the rolling element 322 remains in contact with the roll ramp 3211 and the fixing part 31.

[0086] For example, the rolling element 322 can be a needle roller or a ball roller, and the sliding element 324 can be a flat structural component. One end of the sliding element 324 can be a concave surface that matches the shape of the rolling element 322 to increase the contact area between the sliding element 324 and the rolling element 322, thereby enabling the sliding element 324 to smoothly push the rolling element 322. The sliding element 324 can have a longitudinally elongated mounting space 3240 along its sliding direction. The elastic element 325 can be a cylindrical spring. The length of the mounting space 3240 along the sliding direction is less than the axial length of the spring, so that a part of the spring can be fitted into the mounting space 3240, and the other part can extend out of the mounting space 3240 to elastically abut against the mounting bracket 321, thereby making the sliding element 324 and the mounting bracket 321 elastically connected.

[0087] Please see Figure 2 The connecting shaft 50 may include two shaft segments arranged opposite to each other, one shaft segment being rotatably connected to the base assembly 10, and the other shaft segment being rotatably connected to the hub assembly 20.

[0088] Specifically, the freehub base assembly 10 may also include a first bearing 12 connecting the freehub base shell 11 and the connecting shaft 50. The first bearing 12 is installed inside the freehub base shell 11. The hub assembly 20 may also include a second bearing 22 connecting the hub shell 21 and the connecting shaft 50. The second bearing 22 is installed inside the hub shell 21. The connecting shaft 50 passes through the first bearing 12 and the second bearing 22, so that the hub assembly 20 and the freehub base assembly 10 are rotatably connected to the connecting shaft 50.

[0089] The hub assembly 1 may also include two limiting side covers 60, which are disposed opposite to each other at both ends of the connecting shaft 50. The base assembly 10 and the hub assembly 20 are disposed between the two limiting side covers 60. One limiting side cover 60 is sealed to the base assembly 10, and the other limiting side cover 60 is sealed to the hub assembly 20.

[0090] For example, both ends of the connecting shaft 50 may be provided with external threads, and correspondingly, the two limiting side covers 60 may be provided with matching internal threads, so that the two limiting side covers 60 can be screwed onto both ends of the connecting shaft 50, thereby restricting the axial movement of the freehub assembly 10 and the hub assembly 20 along the connecting shaft 50. The two limiting side covers 60 are also sealed to the freehub shell 11 and the hub shell 21 respectively, to prevent sewage or water vapor from seeping into the freehub shell 11 or the hub shell 21, thereby preventing the inside of the hub assembly 1 from rusting.

[0091] Based on the hub device 1 provided in the embodiments of this application, this application also provides a bicycle, which may include a frame, a front wheel and a rear wheel.

[0092] The front wheel is rotatably located on the front side of the frame, and the rear wheel is rotatably located on the rear side of the frame. The rear wheel includes a hub device 1 according to any embodiment of this application, and the hub device 1 is located at the center of the rear wheel.

[0093] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A flower drum device, characterized in that, include: The connecting shaft consists of two segments that are positioned opposite each other. The tower base assembly, rotatably connected to a section of the connecting shaft, is used for power input; The hub assembly is rotatably connected to the other end of the connecting shaft and is used to output power; A one-way locking assembly is disposed between the freehub assembly and the hub assembly, and is drivingly connected to the freehub assembly and the hub assembly; The one-way locking assembly includes a fixing part connected to the hub assembly; one end of the fixing part is disposed corresponding to the freehub base assembly and is tumbledly connected to the freehub base assembly.

2. The hub device according to claim 1, characterized in that, The tower base assembly includes a tower base body, which includes a first section and a second section connected to each other, and a positioning end is provided between the first section and the second section. The one-way locking assembly further includes a movable part connected to the first segment. The movable part is rotatably engaged with the fixed part, and the fixed part is rotatably connected with the positioning end.

3. The hub device according to claim 2, characterized in that, The hub assembly further includes at least two rollers, which are spaced apart along the rotation direction of the hub assembly and are tactilely connected between the fixing part and the positioning end.

4. The hub device according to claim 3, characterized in that, The rollers include ball bearings or needle rollers.

5. The hub device according to claim 3, characterized in that, The maximum gap between the fixing part and the positioning end is less than the radial dimension of the roller; The fixing part is provided with an annular groove or a recess, and the roller is rotatably disposed within the annular groove or the recess; or... The positioning end is provided with an annular groove or a recess, and the roller is rotatably disposed within the annular groove or the recess; or... The fixing part is provided with an annular groove, and the positioning end is provided with an annular groove or multiple recesses, and the roller is rotatably disposed within the annular groove or recesses; or... The fixing part is provided with a recess, the positioning end is provided with an annular groove, and the roller is rolled within the annular groove and the recess.

6. The hub device according to any one of claims 2-5, characterized in that, The tower base assembly further includes a flange connected to the tower base body for forming at least part of the positioning end; The flange has a first through hole, which is used to inject lubricating medium between the fixing part and the positioning end.

7. The hub device according to any one of claims 2-5, characterized in that, The first segment has an external thread, and the movable part has an internal thread. The movable part is screwed onto the first segment.

8. The hub device according to any one of claims 2-5, characterized in that, The movable part includes a mounting frame and a rolling element. The mounting frame is connected to the tower body. The mounting frame is provided with a ramp. A groove is formed between the ramp and the fixed part. The groove gradually narrows from one end to the other. The rolling element is movably disposed in the groove and keeps in contact with the mounting frame and the fixed part.

9. The hub device according to claim 8, characterized in that, The movable part also includes a limiting edge, and each side of the roller slope is provided with a limiting edge. At least one of the limiting edges is provided with a second through hole, which communicates with the roller groove and is used to inject lubricating medium.

10. A bicycle, characterized in that, include: Frame; The front wheel is rotatably mounted on the front side of the frame; The rear wheel is rotatably disposed at the rear of the frame; the rear wheel includes a hub assembly as described in any one of claims 1-9, the hub assembly being disposed at the center of the rear wheel.

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