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. When the fixing part and the tower footing assembly are in the first state, the fixing part and the tower footing assembly are spaced; and when the fixed part and the tower footing assembly are in the second state, the fixed part is partially contacted with the tower footing assembly. According to the hub device provided by the embodiment of the invention, the tower footing assembly and the fixing part can be switched between the two states, and the hub device has the beneficial effects that the mutual contact time and frictional resistance can be greatly reduced, and the transmission efficiency and the riding experience feeling are effectively 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 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.

[0011] The fixing part is connected to the hub assembly; when the fixing part and the freehub base assembly are in a first state, the fixing part and the freehub base assembly are spaced apart; when the fixing part and the freehub base assembly are in a second state, the fixing part is in partial contact with the freehub base assembly.

[0012] 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;

[0013] 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 can contact the positioning end portion.

[0014] In one embodiment, the positioning end includes an end face corresponding to the fixing part, the end face including a contact area and a non-contact area connected to each other, the contact area protruding from the non-contact area.

[0015] The maximum distance between the non-contact area and the fixed part is greater than the height of the contact area protruding from the non-contact area, and the area of ​​the contact area is smaller than the area of ​​the non-contact area.

[0016] In one embodiment, along the radial direction of the end face, the contact area is located inside the end face, and the non-contact area is located outside the end face; or

[0017] The contact area is located on the outer side of the end face, and the non-contact area is located on the inner side of the end face.

[0018] In one embodiment, the ratio of the area of ​​the contact area to the area of ​​the non-contact area is between 0.05 and 0.5.

[0019] In one embodiment, the tower base assembly further includes a flange disposed on the tower base body for forming at least part of the positioning end;

[0020] The flange includes two end sides and a peripheral side. The two end sides are arranged opposite to each other, and the peripheral side is connected between the two end sides. A weight-reducing groove is formed on one end side and / or the peripheral side.

[0021] 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.

[0022] 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.

[0023] In one embodiment, the movable part further includes a limiting edge, and each side of the rolling ramp is provided with a limiting edge, and at least one of the limiting edges is provided with a through hole, the through hole communicating with the rolling groove.

[0024] In one embodiment, the movable part further includes a slider and an elastic member. The slider is movably disposed in the roller groove, and the elastic member connects the slider and the mounting bracket. The slider is provided with a mating surface for adapting to the rolling element.

[0025] In one embodiment, the mounting bracket is made of bearing steel and the sliding element is made of brass.

[0026] In one embodiment, the fixing part is made of bearing steel and includes an outer ring and a heat-treated inner ring, with the outer ring sleeved on the inner ring.

[0027] In one embodiment, the outer ring has an internal thread, the inner ring has an external thread, and the outer ring is screwed to the inner ring.

[0028] This application also provides a bicycle, including:

[0029] Frame;

[0030] The front wheel is rotatably mounted on the front side of the frame;

[0031] 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.

[0032] The beneficial effects of the embodiments of this utility model are as follows:

[0033] The hub device provided in this application embodiment has a fixed part and a freehub assembly that are spaced apart in a first state and partially in contact in a second state. Its advantage is that when the freehub assembly drives the hub assembly to rotate, the freehub assembly and the fixed part can simultaneously switch between the two states. In the first state, sliding friction between the freehub assembly and the fixed part can be avoided. Compared with related technologies where the freehub assembly and the one-way locking assembly maintain at least partial contact, the hub device provided in this application can significantly reduce the contact time and frictional resistance throughout the entire process of the freehub assembly driving the hub assembly to rotate, effectively improving transmission efficiency and riding experience. Attached Figure Description

[0034] 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.

[0035] Figure 1 This is an exploded schematic diagram of the hub device provided in the embodiments of this application;

[0036] Figure 2 This is a cross-sectional schematic diagram of the hub device provided in the embodiments of this application;

[0037] Figure 3 This is a cross-sectional schematic diagram of the tower base component provided in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram showing the connection between the fixing part and the positioning end provided in an embodiment of this application;

[0039] Figure 5 This is an exploded view of the one-way locking component provided in the embodiments of this application;

[0040] Figure 6 This is a cross-sectional schematic diagram of the one-way locking member provided in the embodiments of this application;

[0041] Figure 7 This is a schematic diagram of the structure of the one-way locking member provided in the embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Hub assembly;

[0044] 10. Tower base assembly; 11. Tower base shell; 111. Tower base body; 1111. First section; 1112. Second section; 112. Positioning end; 1121. Contact area; 1122. Non-contact area; 113. Flange; 1130. Weight reduction groove; 12. First bearing;

[0045] 20. Hub assembly; 21. Hub shell; 210. Receiving cavity; 22. Second bearing;

[0046] 30. One-way locking assembly; 31. Fixed 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. Through hole; 324. Sliding element; 3240. Mounting space; 3241. Mating surface; 325. Elastic element;

[0047] 50. Connecting shaft; 60. Limiting side cover. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Based on the technical problems existing in the hub devices of related technologies, this application provides a hub device that can improve the low transmission efficiency and poor riding experience of the hub devices of related technologies.

[0052] 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.

[0053] 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.

[0054] The connecting shaft 50 positions and connects the tower base assembly 10 and the hub assembly 20.

[0055] 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.

[0056] 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.

[0057] The one-way locking assembly 30 may include a fixing part 31, which is connected to the hub assembly 20. When the fixing part 31 and the freehub base assembly 10 are in a first state, the fixing part 31 is spaced apart from the freehub base assembly 10; when the fixing part 31 and the freehub base assembly 10 are in a second state, the fixing part 31 is in partial contact with the freehub base assembly 10.

[0058] Specifically, in the use of the hub device 1 provided in this application embodiment, the fixing part 31 can move closer to or further away from the freehub base assembly 10 under the action of axial load. The axial load can be the axial component of the load exerted on the fixing part 31 by the freehub base assembly 10 and / or the hub assembly 20.

[0059] When the fixing part 31 is away from the tower base assembly 10, the fixing part 31 and the tower base assembly 10 can be spaced apart, i.e., the first state; conversely, the fixing part 31 is in contact with the tower base assembly 10, i.e., the second state.

[0060] 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.

[0061] 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.

[0062] The hub device 1 provided in this application embodiment has a fixed part 31 that is spaced apart from the freehub assembly 10 in a first state and partially in contact in a second state. Its advantage is that when the freehub assembly 10 drives the hub assembly 20 to rotate, the freehub assembly 10 and the fixed part 31 can switch between the two states at any time. In the first state, sliding friction between the freehub assembly 10 and the fixed part 31 can be avoided. Therefore, during the entire process of the freehub assembly 10 driving the hub assembly 20 to rotate, the contact time and frictional resistance can be greatly reduced, effectively improving transmission efficiency and the user's riding experience.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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, cracking caused by uneven stress can be effectively avoided in some embodiments where the tower base shell 11 and the movable part 32 require heat treatment, thereby improving the structural strength.

[0067] Please see Figure 2 and Figure 4 , Figure 4This 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 partially contact the positioning end 112.

[0068] Specifically, the positioning end 112 may include an end face corresponding to the fixing part 31. The end face includes a contact area 1121 and a non-contact area 1122 connected to each other. The contact area 1121 may protrude from the non-contact area 1122, and the maximum gap between the non-contact area 1122 and the fixing part 31 is greater than the height of the contact area 1121 protruding from the non-contact area 1122, so that the contact area 1121 can contact the fixing part 31, while the non-contact area 1122 remains spaced apart from the fixing part 31 due to the limitation of the contact area 1121.

[0069] It should be noted that the maximum gap between the non-contact area 1122 and the fixing part 31 refers to the maximum assembly distance that the side of the fixing part 31 facing the positioning end 112 can reach relative to the positioning end 112 when the fixing part 31 moves axially relative to the base assembly 10 along the connecting shaft 50 in the hub device 1.

[0070] Please continue reading. Figure 4 Along the radial direction of the end face of the positioning end 112, the contact area 1121 may be located on the inner side of the end face, and the non-contact area 1122 may be located on the outer side of the end face. Alternatively, in some embodiments, the contact area 1121 may be located on the outer side of the end face, and the non-contact area 1122 may be located on the inner side of the end face. It is understood that the contact area 1121 may also be provided at other suitable locations on the end face, as long as the contact area 1121 can ensure that the fixing part 31 and the non-contact area 1122 are spaced apart. Here, the inner side of the end face refers to the side of the end face closer to the connecting shaft 50, and the outer side refers to the side of the end face away from the connecting shaft 50.

[0071] The area of ​​the contact area 1121 is smaller than the area of ​​the non-contact area 1122. The ratio of the areas of the contact area 1121 to the non-contact area 1122 can be set between 0.05 and 0.5. For example, the ratio of the areas of the contact area 1121 to the non-contact area 1122 can be any one of the following optional ratios: 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, and 0.5. Of course, in some other embodiments, it can also be any other optional value between 0.05 and 0.5. This application does not specifically limit the specific values.

[0072] In one embodiment, the fixing part 31 may be provided with a protruding structure (not shown). In the hub assembly 1, the maximum distance between the fixing part 31 and the positioning end 112 is greater than the protruding length of the protruding structure. When the freehub assembly 10 drives the hub assembly 20 to rotate, the fixing part 31 can be spaced apart from the positioning end 112 or the protruding structure can be in contact with the positioning end 112. That is, the fixing part 31 can change with the positioning end 112 at any time between the first state and the second state. This helps to reduce the sliding contact time and sliding friction resistance, thereby improving the transmission efficiency between the freehub assembly 10 and the hub assembly 20.

[0073] It should be noted that the maximum distance between the fixing part 31 and the positioning end 112 refers to the maximum distance that the fixing part 31 can reach relative to the positioning end 112, excluding the protruding structure, on one side of the fixing part 31 facing the positioning end 112 when the fixing part 31 moves axially relative to the tower base assembly 10.

[0074] 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.

[0075] The flange 112 includes two end sides and a peripheral side. The two end sides are arranged opposite to each other. One end side is close to the first segment 1111 and is used to form at least a partial positioning end 112. A weight reduction groove 1130 is provided on one end side and / or the peripheral side.

[0076] For example, a weight-reducing groove 1130 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 1130 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 1130 may be formed on the circumferential side of the flange 113. Alternatively, in one embodiment, both the end of the flange 113 where at least part of the positioning end 112 is formed and the circumferential side may have weight-reducing grooves 1130, or in one embodiment, both the end of the flange 113 facing away from the positioning end 112 and the circumferential side may have weight-reducing grooves 1130. This allows for a reduction in 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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 failing due to impact force.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] like Figure 5The 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.

[0087] Please see Figure 6 and Figure 7 , Figure 7 This 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 through hole 3230, which connects to the roller 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 through hole 3230. The lubricating medium seeps into the roller groove 320 to lubricate the two relatively moving parts and reduce rolling friction.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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 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 base assembly and the hub assembly, providing a driving connection between the freehub base assembly and the hub assembly; the one-way locking assembly includes a fixing part. The fixing part is connected to the hub assembly; when the fixing part and the freehub base assembly are in a first state, the fixing part and the freehub base assembly are spaced apart; when the fixing part and the freehub base assembly are in a second state, the fixing part is in partial contact with 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 can contact the positioning end portion.

3. The hub device according to claim 2, characterized in that, The positioning end includes an end face corresponding to the fixing part, the end face including a contact area and a non-contact area connected together, the contact area protruding from the non-contact area. The maximum distance between the non-contact area and the fixing part is greater than the height of the contact area protruding from the non-contact area; the area of ​​the contact area is smaller than the area of ​​the non-contact area.

4. The hub device according to claim 3, characterized in that, Along the radial direction of the end face, the contact area is located inside the end face, and the non-contact area is located outside the end face; or The contact area is located on the outer side of the end face, and the non-contact area is located on the inner side of the end face.

5. The hub device according to claim 3 or 4, characterized in that, The ratio of the area of ​​the contact area to the area of ​​the non-contact area is between 0.05 and 0.

5.

6. The hub device according to any one of claims 2-4, characterized in that, The tower base assembly further includes a flange disposed on the tower base body for forming at least part of the positioning end; The flange includes two end sides and a peripheral side. The two end sides are arranged opposite to each other, and the peripheral side is connected between the two end sides. A weight-reducing groove is formed on one end side and / or the peripheral side.

7. The hub device according to any one of claims 2-4, 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 2-4, 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, with one limiting edge provided on each side of the roll ramp. At least one of the limiting edges is provided with a through hole, and the through hole communicates with the rolling groove.

10. The hub device according to claim 8, characterized in that, The movable part further includes a slider and an elastic element. The slider is movably disposed in the roller groove, and the elastic element connects the slider and the mounting bracket. The slider is provided with a mating surface for adapting to the rolling element.

11. The hub device according to claim 10, characterized in that, The mounting bracket is made of bearing steel, and the sliding component is made of brass.

12. The hub device according to any one of claims 1-4, characterized in that, The fixing part is made of bearing steel. The fixing part includes an outer ring and a heat-treated inner ring, with the outer ring sleeved on the inner ring.

13. The hub device according to claim 12, characterized in that, The outer ring has an internal thread, the inner ring has an external thread, and the outer ring is screwed to the inner ring.

14. 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 1-13, the hub assembly being disposed at the center of the rear wheel.

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