Carbon fiber hub and bicycle

Abstract

The utility model discloses a carbon fiber hub and a bicycle, the hub comprises a shaft core, a first bearing, a shaft sleeve and a disc brake seat, the shaft core and the shaft sleeve are rotatably connected through the first bearing, and both the shaft core and the shaft sleeve are made of carbon fiber materials. The shaft sleeve is provided with a first installation part, and a plurality of first key grooves extending in the axial direction are formed in the inner wall of the shaft sleeve in the circumferential direction. The disc brake base is inserted in the axial direction and fixedly connected to the first installation part in a gluing mode and is suitable for being matched with a disc brake device to achieve braking, a plurality of first splines extending in the axial direction are arranged on the outer wall of the disc brake base in the circumferential direction, and the first splines are matched with the first key grooves in the first installation part of the shaft sleeve in a one-to-one correspondence mode. The carbon fiber hub adopts components made of carbon fibers, and has the advantages of light weight and high strength.

Description

Technical Field

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

[0002] In the bicycle manufacturing industry, lightweight design has always been a key research focus. This design can improve the handling, acceleration, and overall performance of a bicycle. The hub is a crucial component of a bicycle wheelset, primarily responsible for connecting the wheel to the frame and supporting wheel rotation. A hub typically includes an axle, bearings, and a bushing; rear hubs also include a freehub. The hub axle is fixed to the frame to secure its position. The bearings are mounted on the axle and connect to the hub bushing, which in turn connects to the spokes, thus connecting the hub to the rim. In the rear wheelset, the freehub also connects to the cassette and engages with the hub bushing via a ratchet mechanism to transmit chain power to the rear wheel. Currently, hubs are generally made of metal. While metal offers good strength and durability, its weight increases the overall weight of the bicycle. For bicycles used in long rides or competitive racing, this weight can negatively impact riding performance. Utility Model Content

[0003] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a carbon fiber hub and bicycle. The carbon fiber hub is a component made of carbon fiber and has the advantages of being lightweight and having high strength.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Technical Solution 1: A carbon fiber hub for fixing to a bicycle frame and connecting to a wheel rim via spokes, comprising: a core made of carbon fiber and adapted to be fixed to the frame; a plurality of first bearings axially sleeved on the core; a bushing made of carbon fiber axially sleeved on the core and the first bearings to allow axial rotational connection between the bushings and the core, and adapted to be connected to the wheel rim via the spokes; a first mounting portion provided at the first end of the bushing in the axial direction, the inner wall of the first mounting portion being provided with a plurality of axially extending first keyways along the circumferential direction; and a disc brake seat axially inserted into and glued to the first mounting portion and adapted to cooperate with a disc brake device to achieve braking, the outer wall of which is provided with a plurality of axially extending first splines along the circumferential direction, each first spline corresponding to each of the first keyways on the first mounting portion of the bushing.

[0006] Technical Solution 2 based on Technical Solution 1: The bushing is provided with a first abutting wall facing its first end on the inner side of the first mounting part, and the disc brake seat is provided with a second abutting wall adapted to abut against the first abutting wall axially after the disc brake seat is inserted into the first mounting part; when the disc brake seat is glued and fixed to the bushing, the first abutting wall and the second abutting wall, the outer wall of the disc brake seat and the inner wall of the first mounting part are all glued mating surfaces.

[0007] Technical Solution 3 based on Technical Solution 2: The disc brake seat has a recessed groove along the axial direction from the first abutment wall at the position of each of the first splines, and the recessed groove is adapted to accommodate glue when the disc brake seat and the bushing are glued and fixed together.

[0008] Technical solution four based on technical solution three: the end of the first end of the bushing forms a third abutment wall facing the first end; the outer wall of the disc brake seat is provided with an abutment flange in the circumferential direction that is away from the second abutment wall relative to the first spline; the third abutment wall is adapted to abut against the abutment flange in the axial direction.

[0009] Technical solution five based on technical solution four: The bushing is provided with a plurality of second splines along the circumferential direction on the outer wall of the first mounting part for circumferential upper limit engagement with the spoke seat connecting the spokes, and the position of the second splines corresponds one-to-one with the position of the first keyway.

[0010] Technical solution six based on technical solution five: The disc brake seat is provided with a plurality of third splines along the circumferential direction on the outer wall of the abutting flange, each corresponding to the position of the first spline. The third splines are adapted to cooperate with the second splines in limiting and fitting the spoke seat.

[0011] Technical solution seven based on technical solution one: also includes a tower base and several second bearings; the second end of the bushing is provided with a second mounting part in the axial direction; the second bearings are sleeved on the shaft core in the axial direction; the tower base is installed on the second mounting part and is rotatably connected to the shaft core around the axial direction through the second bearings.

[0012] Technical solution eight based on technical solution seven: The tower base includes a shell, a transmission gear, and a gear seat; the shell is provided with a first tooth, and the transmission gear is provided with a second tooth that forms a ratchet engagement with the first tooth; the inner wall of the second mounting part of the bushing is provided with a plurality of second keyways extending axially along the circumferential direction; the gear seat is inserted into and glued to the second mounting part along the axial direction, and its outer wall is provided with a plurality of fourth splines extending axially along the circumferential direction, each of the fourth splines corresponding to and engaging with the second keyways on the second mounting part of the bushing; the inner wall of the gear seat is provided with a third tooth along the circumferential direction, and the outer wall of the transmission gear is provided with a fourth tooth that meshes with the third tooth along the circumferential direction.

[0013] In addition, the present invention also provides a technical solution eight: a bicycle, which includes a frame and a wheelset, wherein the wheelset is connected to the frame using carbon fiber hubs as described in any one of technical solutions one to seven.

[0014] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0015] Technical Solution 1 provides a carbon fiber hub. The hub's axle and bushing are made of carbon fiber. Compared to conventional metal hubs, using carbon fiber significantly reduces the hub's weight while maintaining good mechanical strength, thus improving the rider's performance. Specifically, a first mounting portion is provided on the bushing, with a first keyway on the first mounting portion. A first spline is provided on the disc brake mount. The disc brake mount can be inserted into the first mounting portion, and the first keyway and second spline form a circumferential limiting fit. Simultaneously, the disc brake mount is glued to the bushing, ensuring it will not detach from the bushing. Since the bushing is made of carbon fiber while the disc brake mount is generally made of metal, they need to be manufactured separately. However, conventional bolt fastening structures can easily cause the disc brake mount to detach. Therefore, a glued connection with a circumferential limiting fit effectively improves the hub's circumferential load-bearing capacity. Furthermore, this connection method is simple and convenient to assemble, effectively improving assembly efficiency.

[0016] In technical solution two, the bushing is provided with a first abutment wall, and the disc brake seat is provided with a second abutment wall. When the disc brake seat and the bushing are glued together, the outer wall of the disc brake seat and the inner wall of the bushing, as well as the first abutment wall and the second abutment wall, all form glued mating surfaces. That is, the two can be glued together at these locations. The first abutment wall and the second abutment wall limit the installation depth of the disc brake seat, which facilitates the installation of the disc brake seat. At the same time, the mating of multiple walls increases the contact area between the bushing and the disc brake seat, thereby increasing the stability and reliability of the connection between the disc brake seat and the housing. This allows the disc brake device to work more stably during braking and reduces the risk of brake failure due to the disc brake seat loosening.

[0017] In technical solution three, a recess is set on the disc brake mount at the position corresponding to the first spline. When the disc brake mount is glued and fixed, the glue will enter the recess. After the glue cures, the glue in the recess will be integrated with the glue in other parts, thereby increasing the contact area of ​​the glue bonding and further improving the installation stability of the disc brake mount. At the same time, the recess can also reduce the volume and weight of the disc brake mount.

[0018] In technical solution four, the first end of the outer shell forms a third abutment wall, and the outer wall of the disc brake seat is provided with an abutment flange. The two abut against each other along the axial direction, which further limits the installation depth of the disc brake seat and increases axial obstruction to prevent glue from overflowing from the first mounting part.

[0019] In technical solution five, a second spline is provided on the outer wall of the bushing. The second spline can form a limiting fit with the spoke seat that connects the spokes in the circumferential direction, so that the bushing can rotate together with the spokes and the wheel rim.

[0020] In technical solution six, a third spline is provided on the disc brake seat. The third spline can cooperate with the second spline, and the two together form a limiting cooperation with the spoke seat. The spoke seat can also play a limiting role on the disc brake seat and the bushing in the opposite direction, thereby improving the connection stability of the disc brake seat and the bushing.

[0021] In technical solution seven, the carbon fiber hub also includes a freehub and a second bearing. The carbon fiber hub with the freehub can be used on the rear wheel of a bicycle. The freehub can be connected to the freewheel, thereby driving the rear wheel assembly to rotate through chain drive.

[0022] In technical solution eight, the hub base includes a housing, a drive gear, and a gear seat. The housing and drive gear form a ratchet engagement through the first and second teeth, allowing the housing to mesh with the drive gear in one rotational direction and disengage from it in the other. Simultaneously, the drive gear and gear seat form a circumferential limiting engagement through the third and fourth teeth, allowing the torque from the housing to the drive gear to be transmitted to the gear seat. The gear seat then engages with the second keyway on the second mounting part of the bushing via a fourth spline. The gear seat and the second mounting part of the bushing are also inserted and glued together, thus forming a strong circumferential limiting engagement between the gear seat and the bushing. The torque from the gear seat can be transmitted to the bushing, and then through the bushing to the spokes and rim. Since the gear seat is made of metal and the bushing is made of carbon fiber, manufacturing them separately and then gluing them together with a circumferential limiting engagement effectively improves the hub's circumferential load-bearing capacity. This connection method is simple and convenient to assemble, effectively improving assembly efficiency.

[0023] Technical solution nine provides a bicycle including a frame and a wheelset, wherein the wheelset uses the aforementioned carbon fiber hubs. Due to the use of the carbon fiber hubs, the weight of the bicycle is reduced, and the rider can have better riding performance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an explosion diagram of the carbon fiber hub according to an embodiment of the present invention. Figure 1 ;

[0026] Figure 2 This is an explosion diagram of the carbon fiber hub according to an embodiment of the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram showing the assembly state of the carbon fiber hub according to an embodiment of the present utility model;

[0028] Figure 4 for Figure 3 Schematic diagram of section AA;

[0029] Figure 5 This is a schematic diagram of the disc brake mount in the carbon fiber hub according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the carbon fiber hub bushing according to an embodiment of the present utility model.

[0031] Explanation of key figure labels:

[0032] Shaft core 1; First bearing 2; Bushing 3; First mounting part 4; First keyway 5; Disc brake seat 6; First spline 7; First abutment wall 8; Second abutment wall 9; Countersunk groove 10; Third abutment wall 11; Abutment flange 12; Second spline 13; Third spline 14; Tower base 15; Second bearing 16; First side cover 17; Second side cover 18; Sealing ring 19; Transmission gear 20; Gear seat 21; Housing 22; Transmission sleeve 23; Bearing sleeve 24; Limiting step 25; First tooth 26; Second tooth 27; Second mounting part 28; Second keyway 29; Fourth spline 30; Third tooth 31; Fourth tooth 32; Sleeve part 33. Detailed Implementation

[0033] 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 preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0035] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0036] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0037] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0038] This utility model relates to a bicycle, which mainly includes a frame and a wheelset. The wheelset includes a rim, spokes, spoke mounts, and carbon fiber hubs. The structure of the carbon fiber hubs differs between the front and rear wheelsets. For ease of explanation, this utility model embodiment uses the carbon fiber hub of the rear wheelset as an example. Furthermore, the bicycle may also include handlebars, pedals, disc brakes, a chain, and a freewheel. These components or devices are conventional in the art and will not be described in detail here.

[0039] Reference Figure 1 and Figure 2 The carbon fiber hub is used to fix the wheel to the frame and connect it to the wheel rim via spokes. The hub is fixed to the spoke seat, and the spokes connect the spoke seat and the wheel rim.

[0040] The carbon fiber hub includes: a core 1, which is made of carbon fiber and is adapted to be fixed to the frame; a plurality of first bearings 2, which are axially sleeved on the core 1; a bushing 3, which is made of carbon fiber and is axially sleeved on the core 1 and the first bearings 2 to be axially rotatably connected to the core 1 via the first bearings 2, and is adapted to be connected to the wheel rim via the spokes; the first end of the bushing 3 is provided with a first mounting part 4, and the inner wall of the first mounting part 4 is provided with a plurality of axially extending first keyways 5 along the circumferential direction; a disc brake seat 6, which is axially inserted and glued to the first mounting part 4 and adapted to cooperate with the disc brake device to achieve braking, and the outer wall is provided with a plurality of axially extending first splines 7 along the circumferential direction, and each first spline 7 corresponds to a first keyway 5 on the first mounting part 4 of the bushing 3.

[0041] Furthermore, since the carbon fiber hub in this embodiment is applied to the rear wheel assembly, it also includes: a freehub base 15 and several second bearings 16; the second end of the bushing 3 is provided with a second mounting portion 28 in the axial direction; the second bearings 16 are axially sleeved on the axle core 1; the freehub base 15 is mounted on the second mounting portion 28 and is rotatably connected to the axle core 1 about the axial direction through the second bearings 16.

[0042] In this embodiment, refer to Figure 1 Since both the hub's axle 1 and bushing 3 are rotating bodies, the construction of each component of the hub will be described in terms of axial and circumferential directions. Furthermore, two ends are defined along the axial direction of the hub: a first end and a second end. The first end is... Figure 1 The upper end, that is, the end where the disc brake mount 6 is installed, the second end is... Figure 1 The lower end, that is, the end where the tower base 15 is installed. It should be understood that the terms "upper end" and "lower end" here refer to... Figure 1 The posture of the drum shown is for reference only and does not represent the state and orientation of the drum during use.

[0043] Specifically, shaft core 1 is along Figure 1 The axially extending hollow tubular component shown is made of carbon fiber. Its manufacturing process can be pultrusion, filament winding, or molding, as long as the core 1 can be manufactured. Two circumferentially projecting limiting steps 25 are provided on the outer wall of the core 1. The step surface of the upper limiting step 25 faces the first end, and the step surface of the lower limiting step 25 faces the second end. There are two first bearings 2, whose inner diameter matches the outer diameter of the core 1. One first bearing 2 is fitted axially from top to bottom onto the core 1 and limited by the upper limiting step 25, while the other first bearing 2 is fitted axially from bottom to top and limited by the lower limiting step 25.

[0044] Bushing 3 is a hollow tubular component extending axially, also made of carbon fiber. (See reference...) Figure 1 and Figure 2 The bushing 3 may include a first mounting portion 4 located at the top, a sleeve portion 33 located in the middle, and a second mounting portion 28 located at the bottom. The first mounting portion 4 is used to mount the disc brake mount 6, the second mounting portion 28 is used to mount the freehub base 15, and the sleeve portion 33 is used to accommodate the middle portion of the shaft core 1. (See reference...) Figure 3 and Figure 4 The outer diameter of the first bearing 2 at the second end position matches the inner diameter of the corresponding position of the bushing 3, forming a connection. The outer diameter of the first bearing 2 at the first end position matches the inner diameter of the corresponding position of the disc brake seat 6. Simultaneously, the disc brake seat 6 is fixedly connected to the bushing 3. Therefore, the first bearing 2 at the first end position is connected to the bushing 3 through the disc brake seat 6. The axle core 1 is then fixed to the frame. The bushing 3 forms a rotatable connection with the axle core 1 around the axial direction through the two first bearings 2. This rotatable connection means that the bushing 3 can rotate relative to the axle core 1 around the axis shown in the attached diagram.

[0045] The bushing 3 has a first abutting wall 8 facing its first end on the inner side of the first mounting part 4, and a third abutting wall 11 facing its first end is formed at the end of the first end. Furthermore, a plurality of second splines 13 are arranged circumferentially on the outer wall of the first mounting part 4 for circumferentially positioning and engaging with the spoke seat connecting the spokes, and the positions of the second splines 13 correspond to the positions of the first keyway 5.

[0046] Specifically, refer to Figure 4 and Figure 6The first mounting portion 4 of the bushing 3 has a larger inner and outer diameter than the sleeve portion 33. A right-angle bend is formed between the sleeve portion 33 and the first mounting portion 4 on its inner wall. The first abutment wall 8 is provided on this right-angle bend, with its surface facing the first end of the bushing 3. Simultaneously, multiple outwardly recessed and axially extending first keyways 5 are arranged circumferentially on the inner wall of the first mounting portion 4. The lower end of each first keyway 5 extends to the first abutment wall 8, and its upper end extends to the third abutment wall 11, which is the axial end wall of the bushing 3. In this embodiment, there are five first keyways 5, evenly distributed circumferentially. Furthermore, multiple outwardly protruding and axially extending second splines 13 are arranged circumferentially on the outer wall of the first mounting portion 4. These second splines 13 can mate with the keyways on the spoke seats, allowing the bushing 3 and the spoke seats to form a circumferentially limiting fit. Similarly, multiple outwardly protruding and axially extending second splines 13 are also arranged circumferentially on the outer wall of the second mounting portion 28 of the bushing 3. These second splines 13 can also mate with the keyways on the spoke seats, allowing the bushing 3 and the spoke seats to form a circumferential limiting fit. With this arrangement, the two ends of the bushing 3 in the axial direction respectively form limiting fits with two spoke seats, and these two spoke seats are then connected to the wheel rim through two sets of spokes, thus forming a fixed connection between the bushing 3 and the wheel rim.

[0047] Reference Figure 1 , Figure 2 and Figure 5 The disc brake seat 6 is a hollow tubular component extending axially. It has a relatively short axial length and external teeth on its outer wall near its first end to connect and engage with the disc brake device to achieve braking of the wheelset. The outer diameter of the portion of the disc brake seat 6 near its second end matches the inner diameter of the first mounting portion 4 of the bushing 3. The outer wall of the disc brake seat 6 has a first spline 7, which corresponds to and engages with the first keyway 5 on the first mounting portion 4. Therefore, the disc brake seat 6 can be inserted axially into the first mounting portion 4 of the bushing 3, forming a circumferential limiting fit with the bushing 3. Furthermore, the disc brake seat 6 is glued and fixed to the first mounting portion 4 of the bushing 3 to prevent the disc brake seat 6 from detaching from the bushing 3 axially.

[0048] The disc brake seat 6 is provided with a second abutment wall 9 adapted to axially abut against the first abutment wall 8 after the disc brake seat 6 is inserted into the first mounting part 4; when the disc brake seat 6 is glued and fixed to the bushing 3, the first abutment wall 8, the second abutment wall 9, the outer wall of the disc brake seat 6, and the inner wall of the first mounting part 4 are all glued mating surfaces. The outer wall of the disc brake seat 6 is provided with an abutment flange 12 circumferentially away from the second abutment wall 9 relative to the first spline 7; the third abutment wall 11 is adapted to axially abut against the abutment flange 12.

[0049] Specifically, refer to Figure 5 The end wall of the second end of the disc brake seat 6 forms a second abutment wall 9, and the outer wall of the disc brake seat 6 is surrounded by a protruding abutment flange 12. The distance between the lower end wall of the abutment flange 12 and the second abutment wall 9 is the same as the distance between the first abutment wall 8 and the third abutment wall 11 on the bushing 3. After the disc brake seat 6 is inserted into the bushing 3, the abutment flange 12 abuts against the third abutment wall 11, and the second abutment wall 9 abuts against the first abutment wall 8. The first spline 7 is inserted into the first keyway 5, and the outer wall of the disc brake seat 6 fits against the inner wall of the bushing 3. When gluing and fixing the disc brake seat 6 and the bushing 3, glue can be applied to the outer wall below the abutting flange 12 and the second abutting wall 9 of the disc brake seat 6, and then the disc brake seat 6 is inserted into the bushing 3. At this time, the first abutting wall 8 and the second abutting wall 9, the outer wall of the disc brake seat 6 and the inner wall of the first mounting part 4 all serve as gluing mating surfaces, so that the disc brake seat 6 can have sufficient gluing contact area with the bushing 3.

[0050] In addition, refer to Figure 5 The disc brake seat 6 has a recessed groove 10 along the axial direction from the first abutment wall 8 at each of the first splines 7. The groove 10 is adapted to accommodate glue when the disc brake seat 6 and the bushing 3 are glued together. (Refer to...) Figure 4 The inner wall at the second end of the disc brake mount 6 has an inwardly bent right-angle structure. The second end of the first bearing 2 abuts against the wall surface of this right-angle bent structure facing the first end. Therefore, the side wall of the disc brake mount 6 does not have sufficient thickness for the recess 10 to be formed. Meanwhile, referring to... Figure 4 and Figure 5 The first spline 7 protrudes from the outer wall of the disc brake mount 6, and the recess 10 is set in this part of the body. The recess 10 is set on the disc brake mount 6 at the position corresponding to the first spline 7. When the disc brake mount 6 is glued and fixed, the glue will enter the recess 10. After the glue cures, the glue in the recess 10 will be integrated with the glue in other parts, thereby increasing the contact area of ​​the glue bonding and further improving the installation stability of the disc brake mount 6. At the same time, the recess 10 can also reduce the volume and weight of the disc brake mount 6.

[0051] Reference Figure 1 , Figure 2 and Figure 3The tower base 15 includes a housing 22, a transmission gear 20, and a gear seat 21. The housing 22 is provided with a first tooth 26, and the transmission gear 20 is provided with a second tooth 27 that forms a ratchet engagement with the first tooth 26. The inner wall of the second mounting portion 28 of the bushing 3 is provided with a plurality of second keyways 29 extending axially along the circumferential direction. The gear seat 21 is inserted into and glued to the second mounting portion 28 along the axial direction, and its outer wall is provided with a plurality of fourth splines 30 extending axially along the circumferential direction. Each of the fourth splines 30 corresponds to and engages with the second keyways 29 on the second mounting portion 28 of the bushing 3. The inner wall of the gear seat 21 is provided with a third tooth 31 along the circumferential direction, and the outer wall of the transmission gear 20 is provided with a fourth tooth 32 that meshes with the third tooth 31 along the circumferential direction.

[0052] There are two second bearings 16, both of which are fitted onto the shaft core 1 near the second end and are positioned by bearing sleeves 24 fitted onto the shaft core 1. The inner rings of the two second bearings 16 are fixed to the shaft core 1, and the outer rings are fixed to the housing 22 of the tower base 15, forming a rotatable connection between the housing 22 and the shaft core 1. A transmission sleeve 23 is also fitted onto the shaft core 1 between the second bearing 16 located at the upper position and the first bearing 2 located at the lower position. A sealing ring 19 is provided on the end wall of the first end of the housing 22, and the sealing ring 19 abuts against the end wall of the second end of the gear seat 21.

[0053] The housing 22 and the transmission gear 20 form a ratchet engagement through the first tooth 26 and the second tooth 27, allowing the housing 22 to mesh with the transmission gear 20 in one rotational direction and disengage from it in the other rotational direction. Simultaneously, the transmission gear 20 and the gear seat 21 form a circumferential limiting engagement through the third tooth 31 and the fourth tooth 32, allowing the torque of the housing 22 on the transmission gear 20 to be transmitted to the gear seat 21. The gear seat 21 then engages with the second keyway 29 on the second mounting portion 28 of the bushing 3 through the fourth spline 30. Simultaneously, the gear seat 21 and the second mounting portion 28 of the bushing 3 are inserted and glued together, thus forming a strong circumferential limiting engagement between the gear seat 21 and the bushing 3. The torque of the gear seat 21 can be transmitted to the bushing 3, and then through the bushing 3 to the spokes and rim. Since the gear seat 21 is made of metal and the bushing 3 is made of carbon fiber, the two are molded and manufactured separately. They are then glued together and connected by upper limit fitting in the circumferential direction. This effectively improves the hub's ability to bear loads in the circumferential direction. Furthermore, this connection method is simple and convenient to assemble, which can effectively improve assembly efficiency.

[0054] In addition, refer to Figure 1 and Figure 2The hub also includes a first side cover 17 and a second side cover 18. The first side cover 17 is sleeved and fixed to the first end of the shaft core 1, and the second side cover 18 is sleeved and fixed to the second end of the shaft core 1, respectively used to position the upper first bearing 2 and the lower second bearing 16 of the two second bearings 16.

[0055] The bicycle wheelset of this embodiment uses the aforementioned carbon fiber hub. Due to the use of this carbon fiber hub, the bicycle's weight is reduced, allowing the rider to have better riding performance. The hub's axle core 1 and bushing 3 are made of carbon fiber. Compared to conventional metal hubs, using carbon fiber significantly reduces the hub's weight while maintaining good mechanical strength, thereby improving the rider's riding performance. The hub features a first mounting portion 4 on the bushing 3, a first keyway 5 on the first mounting portion 4, and a first spline 7 on the disc brake seat 6. The disc brake seat 6 can be inserted into the first mounting portion 4, and a circumferential limiting fit is formed by the cooperation of the first keyway 5 and the second spline 13. At the same time, the disc brake seat 6 is glued to the bushing 3 to ensure that the disc brake seat 6 will not fall off the bushing 3. Since the bushing 3 is made of carbon fiber and the disc brake seat 6 is generally made of metal, the two need to be manufactured separately. However, using a conventional bolt fastening structure can easily cause the disc brake seat 6 to fall off. Therefore, the method of glued fixation and circumferential limiting fit is used to form a connection, which can effectively improve the hub's ability to bear loads in the circumferential direction. In addition, this connection method is simple and convenient to assemble, which can effectively improve assembly efficiency.

[0056] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A carbon fiber hub for fixing to a frame and connecting to a wheel rim via spokes, characterized in that, include: A shaft core (1) is made of carbon fiber and is suitable for being fixed to the frame; Several first bearings (2) are sleeved axially on the core (1); A bushing (3), made of carbon fiber, is axially sleeved around the shaft core (1) and the first bearing (2) to allow axial rotational connection between the bushing (3) and the shaft core (1) via the first bearing (2), and is adapted to be connected to the wheel rim via the spokes; the first end of the bushing (3) in the axial direction is provided with a first mounting part (4), and the inner wall of the first mounting part (4) is provided with a plurality of axially extending first keyways (5) arranged circumferentially; and The disc brake mount (6) is inserted into and glued to the first mounting part (4) along the axial direction and is adapted to cooperate with the disc brake device to achieve braking. Its outer wall is provided with a plurality of first splines (7) extending along the axial direction. Each first spline (7) corresponds to each first keyway (5) on the first mounting part (4) of the bushing (3).

2. A carbon fiber hub as described in claim 1, characterized in that, The bushing (3) has a first abutting wall (8) facing its first end on the inner side of the first mounting part (4), and the disc brake seat (6) has a second abutting wall (9) adapted to abut against the first abutting wall (8) axially after the disc brake seat (6) is inserted into the first mounting part (4); when the disc brake seat (6) is glued and fixed to the bushing (3), the first abutting wall (8) and the second abutting wall (9), the outer wall of the disc brake seat (6) and the inner wall of the first mounting part (4) are all glued mating surfaces.

3. A carbon fiber hub as described in claim 2, characterized in that, The disc brake seat (6) has a recessed groove (10) along the axial direction from the first abutment wall (8) at the position of each of the first splines (7). The recessed groove (10) is adapted to accommodate glue when the disc brake seat (6) and the bushing (3) are glued together.

4. A carbon fiber hub as described in claim 3, characterized in that, The first end of the bushing (3) forms a third abutment wall (11) facing its first end; the outer wall of the disc brake seat (6) is provided with an abutment flange (12) in the circumferential direction, which is away from the second abutment wall (9) relative to the first spline (7); the third abutment wall (11) is adapted to abut against the abutment flange (12) in the axial direction.

5. A carbon fiber hub as described in claim 4, characterized in that, The bushing (3) has a plurality of second splines (13) arranged circumferentially on the outer wall of the first mounting part (4) for circumferentially positioning and engaging with the spoke seat connecting the spokes. The positions of the second splines (13) correspond one-to-one with the positions of the first keyway (5).

6. A carbon fiber hub as described in claim 5, characterized in that, The disc brake seat (6) has a plurality of third splines (14) arranged circumferentially on the outer wall of the abutting flange (12), which correspond one-to-one with the positions of the first splines (7). The third splines (14) are adapted to cooperate with the second splines (13) in limiting the fit of the spoke seat.

7. A carbon fiber hub as described in claim 1, characterized in that, It also includes a tower base (15) and several second bearings (16); the second end of the bushing (3) is provided with a second mounting part (28) in the axial direction; the second bearings (16) are sleeved on the shaft core (1) in the axial direction; the tower base (15) is installed on the second mounting part (28) and is rotatably connected to the shaft core (1) in the axial direction through the second bearings (16).

8. A carbon fiber hub as described in claim 7, characterized in that, The tower base (15) includes a housing (22), a transmission gear (20), and a gear seat (21); the housing (22) is provided with a first tooth (26), and the transmission gear (20) is provided with a second tooth (27) that forms a ratchet engagement with the first tooth (26); the inner wall of the second mounting part (28) of the bushing (3) is provided with a plurality of second keyways (29) extending axially along the circumferential direction; the gear seat (21) is inserted into and glued to the second mounting part (28) along the axial direction, and its outer wall is provided with a plurality of fourth splines (30) extending axially along the circumferential direction, and each of the fourth splines (30) corresponds to and engages with the second keyways (29) on the second mounting part (28) of the bushing (3); the inner wall of the gear seat (21) is provided with a third tooth (31) along the circumferential direction, and the outer wall of the transmission gear (20) is provided with a fourth tooth (32) that meshes with the third tooth (31) along the circumferential direction.

9. A bicycle comprising a frame and wheelsets, characterized in that, The wheelset is connected to the frame using a carbon fiber hub as described in any one of claims 1-8.

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