Spoke anti-rotation assembly part, anti-rotation spoke, hub, hub assembly and bicycle rim

Abstract

The utility model discloses a spoke anti-rotation assembly part, anti-rotation spoke, hub, hub component and bicycle rim, the assembly part comprises a connecting body, a mounting cavity matched with the bicycle spoke is formed in the connecting body, the top of the connecting body is provided with a limit cap, and the limit cap is connected with the connecting body. A first limiting straight edge and a second limiting straight edge are arranged on the limiting cap or the connecting body in a protruding and extending mode, and the first limiting straight edge and the second limiting straight edge are parallel to each other and used for abutting against spoke grooves of the hub from the two sides so as to prevent spokes from rotating. According to the hub, T-shaped clamping grooves do not need to be additionally machined, limiting is achieved through the positions of the spoke grooves in the hub, grooves can be formed in the two end faces of each spoke disc, the weight of the hub is reduced, meanwhile, the spokes are woven in a crossed mode, the shapes are diversified, and assembly parts are simple in structure and prevent the spokes from rotating.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hubs, and in particular to a spoke anti-rotation assembly, an anti-rotation spoke, a hub, a wheel hub assembly and a bicycle rim. Background Art

[0002] At present, various cycling equipment such as electric bicycles for commuting and mountain bikes for fitness are becoming more and more popular. Bicycles need hub components for transmission. Hub components include hubs and freewheel bases. Several spokes connect hubs and rims.

[0003] Spokes and hubs are important components of wheels on bicycles, electric vehicles and motorcycles. The hub is an important component that connects the axle and spokes. Its quality directly affects the performance of the vehicle and determines the structural strength, load-bearing capacity and service life of the entire wheel. The hub generally includes a hub body and spoke discs at both ends of the hub body. In the traditional connection structure between spokes and hubs, one end of the spoke is connected to the spoke disc through a connector, and the other end is connected to the wheel rim.

[0004] Please refer to Figure 1 as well as Figure 2 In the existing spoke arrangement installation structure, the hub assembly includes a freehub 150 and a hub 120. The hub 120 is provided with a left spoke disc 161 and a right spoke disc 162, and each spoke disc has a plurality of T-shaped slots on the outer side, such as a T-shaped slot on the outer side of the right spoke disc 162. Figure 1 As shown, it includes a connecting body 101 , a limiting body 103 is arranged on the top of the connecting body 101 , and notches are cut on both sides of the limiting body 103 to prevent the connecting body 101 from rotating, thereby forming a flat fixing portion 104 .

[0005] The existing hubs and connectors have the following disadvantages: the position of the slot where the spoke connector is assembled with the hub is limited by the machining process, and a T-shaped slot must be processed separately, such as Figure 2 The illustrated clamping groove 171 and the T-shaped clamping grooves 172 and 173 on both sides are used to clamp the two ends of the clamping portion 104 at the flat notch position of the spoke connecting head.

[0006] However, the T-slots of the left spoke disc 161 and the right spoke disc 162 are only provided on one side of the outer side. Further expanding the slot 171 to provide two symmetrical T-slots in the slot cavity requires thickening the flange to reserve space for the T-slots, thus making the existing hub heavier.

[0007] In addition, the cross-spoke method with T-shaped slots on one side is limited in appearance and shape due to the limitation on the number of installed spokes. Summary of the invention

[0008] Based on this, in order to solve the above-mentioned problems in traditional technologies, the utility model proposes a spoke groove on the hub that limits its own position. Each spoke disk can be grooved on both end faces, which reduces the weight of the hub while increasing the spoke installation stations to diversify the spoke cross-weaving methods. The assembly structure is simple and prevents the spokes from rotating, and includes a spoke anti-rotation assembly, an anti-rotation spoke, a hub, a hub assembly, and a bicycle rim.

[0009] In the first aspect, the utility model relates to a spoke anti-rotation assembly, including a connector, a mounting cavity formed in the connector for cooperating with a bicycle spoke, a limiting cap is arranged on the top of the connector, a first limiting straight edge and a second limiting straight edge are protruding from the limiting cap or the connector, the first limiting straight edge and the second limiting straight edge are parallel to each other, and are used to press against the spoke groove of the hub from both sides to prevent the spoke from rotating.

[0010] In the anti-rotation implementation method, the first limiting straight edge and the second limiting straight edge are the two side edges of the square protrusion of the limiting cap; or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap, and the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connecting body, and the first limiting straight edge and the second limiting straight edge are the two side edges of the limiting block.

[0011] In the second aspect, the utility model relates to an anti-rotation spoke, comprising a main body, a first connecting end, a second connecting end and an assembly part, the first connecting end fixes the assembly part and is clamped on the spoke disk of the hub, the second connecting end is connected to the rim, the assembly part comprises a connector, a mounting cavity is formed in the connector and is mounted in cooperation with the first connecting end, a limiting cap is arranged on the top of the connector, a first limiting straight edge and a second limiting straight edge are protruded from the limiting cap or the connector, the first limiting straight edge and the second limiting straight edge are parallel to each other, and are used to press against the spoke grooves of the spoke disk from both sides to prevent the spokes from rotating.

[0012] In the anti-rotation implementation method, the first limiting straight edge and the second limiting straight edge are the two side edges of the square protrusion of the limiting cap, or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap, and the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connecting body, and the first limiting straight edge and the second limiting straight edge are the two side edges of the limiting block.

[0013] In the third aspect, the utility model relates to a hub, comprising a hub shell, wherein a first spoke disk and a second spoke disk are respectively arranged at two ends of the hub shell, the first spoke disk and the second spoke disk respectively include a plurality of spoke ears, each spoke ear is respectively provided with a limit groove and a connected spoke groove on the front and rear end surfaces, and an assembly part is installed in each limit groove and the spoke groove; the assembly part includes a limit cap and a connector which are inserted into the corresponding limit groove, a first limit straight edge and a second limit straight edge are protruding from the limit cap or the connector, the first limit straight edge and the second limit straight edge are parallel to each other, and are used to press against the corresponding spoke groove from both sides to prevent the spokes from rotating.

[0014] Among them, one end face of each spoke ear is provided with a first limiting groove and a first spoke groove connected with the first limiting groove, and the other end face is provided with a second limiting groove and a second spoke groove connected with the second limiting groove, and the outlet direction of the second spoke groove is opposite to the outlet direction of the first spoke groove; each assembly part includes a connector, an installation cavity for installing the spoke is formed in the connector, a limiting cap is arranged on the top of the connector, and the first limiting straight edge and the second limiting straight edge are protrudingly arranged on the limiting cap or the connector.

[0015] The first limiting straight edge and the second limiting straight edge are the two side edges of the square protrusion of the limiting cap, or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap; the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connector, and the first limiting straight edge and the second limiting straight edge are the two side edges of the limiting block.

[0016] In a fourth aspect, the utility model relates to a wheel hub assembly, comprising a hub and a freewheel base, the hub comprising a hub shell, the hub shell being respectively provided with a first spoke disk and a second spoke disk at both ends, the first spoke disk and the second spoke disk respectively comprising a plurality of spoke ears, each spoke ear being respectively provided with a limiting groove and a connected spoke groove on the front and rear end surfaces, and an assembly part being installed in each pair of limiting grooves and spoke grooves; the assembly part comprises a limiting cap and a connector which are inserted into the corresponding limiting grooves, a first limiting straight edge and a second limiting straight edge protruding from the limiting cap or the connector, the first limiting straight edge and the second limiting straight edge being parallel to each other, and being used to press against the corresponding spoke grooves from both sides to prevent the spokes from rotating.

[0017] Preferably, a first limit groove and a first spoke groove connected to the first limit groove are formed on one end face of each spoke ear, and a second limit groove and a second spoke groove connected to the second limit groove are formed on the other end face, and the outlet direction of the second spoke groove is opposite to the outlet direction of the first spoke groove; each assembly part includes a connector, in which an installation cavity for installing the spoke is formed, a limit cap is arranged on the top of the connector, and the first limit straight edge and the second limit straight edge are protrudingly arranged on the limit cap or the connector.

[0018] In a fifth aspect, the utility model relates to a bicycle rim, comprising a rim and a hub assembly located at the center of the rim, wherein the hub assembly comprises the hub and freewheel base as described in the third aspect.

[0019] The spoke anti-rotation assembly, anti-rotation spoke, hub, hub assembly and bicycle wheel rim of the utility model, the assembly is a limiting structure with the same shape as the hub spoke groove protruding from the edge of the limiting cap, relying on the shape and position of the spoke groove on the hub to achieve the limit anti-rotation, the assembly structure is simple and easy to install. The assembly can be made of metal material or carbon fiber material or other materials.

[0020] The hub, wheel hub assembly and bicycle wheel rim of the utility model can respectively open more limit grooves and spoke grooves on the front and rear end surfaces of each disk surface of the first spoke disk and the second spoke disk, thereby reducing the weight of the hub and increasing the spoke installation stations to diversify the spoke cross-weaving methods.

[0021] The anti-rotation spoke, hub, wheel hub assembly and bicycle rim of the utility model can realize the anti-rotation function of the spoke by means of the structure of the spoke groove itself under the same conditions by using the anti-rotation assembly designed in this embodiment. The double-sided grooves can reduce the weight of the hub and facilitate processing and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] in:

[0024] Figure 1 It is a structural diagram of a connector in the prior art;

[0025] Figure 2 It is a structural schematic diagram of a hub and a T-shaped slot in the prior art;

[0026] Figure 3 This is a schematic structural diagram of a first embodiment of a spoke anti-rotation assembly of this embodiment;

[0027] Figure 4 It is a structural schematic diagram of a second embodiment of the spoke anti-rotation assembly of this embodiment;

[0028] Figure 5 It is a structural schematic diagram of a third embodiment of the spoke anti-rotation assembly of this embodiment;

[0029] Figure 6 It is a schematic structural diagram of the hub in the first direction of this embodiment;

[0030] Figure 7 is a schematic structural diagram of the hub in the second direction of this embodiment;

[0031] Figure 8 It is a structural schematic diagram of a first embodiment of the anti-rotation spoke of this embodiment;

[0032] Fig. 9 It is a structural schematic diagram of a second embodiment of the anti-rotation spoke of this embodiment;

[0033] Fig.10 A first direction structural diagram of the bicycle wheel rim of this embodiment and an enlarged diagram of the hub assembly;

[0034] Fig.11 It is a second direction structural diagram of the bicycle rim of this embodiment and an enlarged diagram of the hub assembly. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Please refer to Figure 3 , Figure 4 as well as Figure 5 , which are structural diagrams of two different embodiments of spoke rotating assemblies. Figure 3 As shown, in the first embodiment, the spoke anti-rotation assembly 6 includes a connecting body 61, and a mounting cavity 62 is formed in the connecting body 61 to be mounted in cooperation with the spokes of the bicycle. From the BB cross-sectional view, a limiting cap 67 is provided on the top of the connecting body 61. The limiting cap 67 protrudes to provide a first limiting straight edge 63 and a second limiting straight edge 65. The first limiting straight edge 63 is the outer edge of the first convex strip extending from the limiting cap 67, and the second limiting straight edge 65 is the outer edge of the second convex strip protruding from the limiting cap. In this embodiment, corresponding to the shape of the spoke groove of the hub, the first limiting straight edge 63 and the second limiting straight edge 65 are parallel to each other, and are used to press against the spoke groove of the hub from both sides to prevent the spokes from rotating, such as Figure 6 Spoke grooves 322 are shown.

[0037] like Figure 4As shown, in the second embodiment, the spoke anti-rotation assembly 7 includes a connecting body 71, and a mounting cavity 72 for mounting with the bicycle spoke is formed in the connecting body 71. From the CC cross-sectional view, a limiting cap 78 is provided on the top of the connecting body 71. The limiting cap 78 protrudes to set a first limiting straight edge 75 and a second limiting straight edge 76. In this embodiment, the first limiting straight edge 75 and the second limiting straight edge 76 are two side edges of a square protrusion protruding from the limiting cap 78, including a first side edge and a second side edge, the first side edge corresponds to the first limiting straight edge 75, and the second side edge corresponds to the second limiting straight edge 76.

[0038] like Figure 5 As shown, in the third embodiment, the spoke anti-rotation assembly 9 includes a connecting body 91, and a mounting cavity 92 is formed in the connecting body 91 for mounting with the bicycle spoke. Figure 5 From the cross-section shown, a limiting cap 98 is provided on the top of the connector 91. A limiting block 94 is provided on the connector 91 below the limiting cap 98. The two sides of the limiting block 94 are respectively a first limiting straight edge 95 and a second limiting straight edge 96. In this embodiment, the spoke anti-rotation assembly 6, 7 or 9 is a limiting structure protruding from the edge of the corresponding limiting cap or connector and having the same shape as the spoke groove of the hub, and the limiting anti-rotation is achieved by relying on the shape and position of the spoke groove on the hub, and the assembly structure is simple and easy to install.

[0039] The anti-rotation spoke of this embodiment is formed by using the above-mentioned spoke anti-rotation assembly on the carbon spoke.

[0040] Please refer to Figure 8 as well as Fig. 9 , which are structural diagrams of the first and second embodiments of the anti-rotation spokes.

[0041] exist Figure 8 The anti-rotation spoke of the first embodiment includes a body 5 , a first connecting end 51 , a second connecting end 52 , and a spoke anti-rotation assembly 6 .

[0042] The end of the first connecting end 51 is fixedly connected to the assembly part 6, and the first connecting end 51 and the assembly part 6 are clamped on the spoke disk of the hub, for example Figure 6The hub 2 is shown as being mounted on the first spoke disc 20 or the second spoke disc 30. The second connecting end 52 is mounted on the corresponding fixing hole of the wheel rim 8 through the threaded end 53. The anti-rotation spoke 6 passes through the mounting cavity 62 of the connector 61 and the limiting cap 67, and is pressed in the mounting cavity 62 of the connector 61. The limiting cap 67 is protruding to set a first limiting straight edge 63 and a second limiting straight edge 65, and the first limiting straight edge 63 and the second limiting straight edge 65 are parallel to each other and are used to press against the spoke groove of the spoke disc from both sides to prevent the spoke from rotating. In this embodiment, a gap 64 is provided between the first limiting straight edge 63 and the second limiting straight edge 65.

[0043] exist Fig. 9 The anti-rotation spoke of the second embodiment shown is installed with the assembly part 7 of the second embodiment, which specifically includes a body 5 , a first connecting end 51 , a second connecting end 52 and a spoke anti-rotation assembly part 7 .

[0044] The end of the first connecting end 51 is fixedly connected to the assembly part 7, and the first connecting end 51 together with the assembly part 7 is clamped in the spoke ear of the hub, for example Figure 6 The spoke lug 32 of the hub 2 is shown. The second connecting end 52 is installed on the corresponding fixing hole of the rim 8 through the threaded end 53. The anti-rotation spoke 5 passes through the installation cavity 72 of the connecting body 71 and the limiting cap 78, and is pressed in the installation cavity 72 of the connecting body 71. The limiting cap 78 protrudes to set a first limiting straight edge 75 and a second limiting straight edge 76.

[0045] The spoke anti-rotation assembly or the anti-rotation spoke is used on a hub to form the spoke anti-rotation hub of the present embodiment.

[0046] Please refer to Figure 6 as well as Figure 7 , showing the first-view and reverse-view structural diagrams of the hub.

[0047] The hub of this embodiment includes a hub shell 2 and a spindle 1. The spindle 1 is inserted into the hub shell 2 and supports the hub shell 2 via a plurality of bearings.

[0048] The hub shell 2 is provided with a first spoke disc 20 and a second spoke disc 30 at both ends. The hub is transmission-engaged with a freewheel base 4 at one end of the second spoke disc 30.

[0049] The first spoke disc 20 includes a plurality of first spoke ears, such as first spoke ears 21, 22, and 23. The second spoke disc 30 includes a plurality of second spoke ears, such as second spoke ears 31, 32, 33, and 36.

[0050] Each spoke lug is provided with a limit groove and a connected spoke groove on both front and rear end surfaces. In specific implementation, one end surface of each spoke lug is provided with a first limit groove and a first spoke groove connected with the first limit groove, and the other end surface is provided with a second limit groove and a second spoke groove connected with the second limit groove, and the outlet direction of the second spoke groove is opposite to the outlet direction of the first spoke groove.

[0051] for example, Figure 6 as well as Figure 7 As shown, the first spoke lug 21 is provided with a first limiting groove 211 and a connected first spoke groove 212 on the outer end surface, and another groove group, a second limiting groove 215 and a connected second spoke groove 216, is provided on the inner end surface. Alternatively, the first spoke lug 23 is provided with a first limiting groove 231 and a connected first spoke groove 232 on the outer end surface, and another groove group, a second limiting groove 235 and a connected second spoke groove 236, is provided on the inner end surface. A groove shoulder is provided in each limiting groove, such as a groove shoulder 238 on the inner side of the first spoke lug 23.

[0052] The second spoke lug 32 is provided with a second limiting groove 321 and a connected second spoke groove 322 on the inner end surface, and another groove group, a first limiting groove 325 and a connected first spoke groove 326, is provided on the outer end surface. Alternatively, the second spoke lug 36 is provided with a second limiting groove 361 and a connected second spoke groove 362 on the inner end surface, and another groove group, a first limiting groove 365 and a connected first spoke groove 366, is provided on both outer ends. A groove shoulder is provided in each limiting groove, such as a groove shoulder 364 on the inner side of the second spoke lug 36.

[0053] Each spoke ear is equipped with two assembly parts in two groups of limit grooves and spoke grooves. For example, the first spoke ear 21 has two assembly parts for two spokes in the groove groups on the inner and outer end surfaces; the second spoke ear 32 has two assembly parts for two spokes in the groove groups on the inner and outer end surfaces.

[0054] During assembly, the assembly part 6, 7 or 9 is mounted on one end of the spoke and clamped in the spoke ear together with the corresponding spoke. The limiting cap 67 of the assembly part 6, the limiting cap 78 of the assembly part 7 or the limiting cap 98 of the assembly part 9 sinks into the limiting groove and is limited on the groove shoulder, such as the groove shoulder 238 of the spoke ear 23. The spoke passes through the corresponding spoke groove, such as the spoke groove 236. The spoke also clamps the first limiting straight edge and the second limiting straight edge of the assembly part into the corresponding spoke groove, such as Figure 6As shown, the limiting cap 67 of the assembly part 6 for fixing the spoke 5 is pushed into the second limiting groove 321 of the spoke ear 32 of the second spoke disk 30 and clamped on the groove shoulder, and the spoke passing through the spoke groove 322 clamps the first limiting straight edge 63 and the second limiting straight edge 65 into the corresponding second spoke groove 322; or the limiting cap 78 of the assembly part 7 is pushed into the first limiting groove 231 of the first spoke disk 20 and is limited on the groove shoulder 238, and the spoke passing through the spoke groove 232 clamps the first limiting straight edge 75 and the second limiting straight edge 76 into the first spoke groove 232; or as shown Figure 7 As shown, the limiting cap 98 of the assembly part 9 is pushed into the inner limiting groove 235 of the spoke ear 23 of the first spoke disk 20 and limited on the groove shoulder 238. The spoke passing through the spoke groove 236 will also clamp the first limiting straight edge 94 and the second limiting straight edge 95 into the spoke groove 236.

[0055] The hub assembly of this embodiment is formed by combining the above-mentioned hub with the freewheel base.

[0056] Please refer to Figure 6 as well as Figure 7 The hub assembly includes a hub and a freehub. The hub includes a hub shell 2 and a spindle 1. The spindle 1 is inserted into the hub shell 2 and supported by a plurality of bearings. The hub shell 2 is provided with a first spoke disc 20 and a second spoke disc 30 at both ends. The hub is transmission-engaged with a freehub 4 at one end of the second spoke disc 30.

[0057] The hub structure in the wheel hub assembly is the same as the aforementioned hub mechanism and will not be described in detail.

[0058] Please refer to Fig.10 as well as Fig.11 The present embodiment relates to a bicycle wheel rim, comprising a wheel rim 8 and a hub assembly located at the center of the wheel rim, wherein the wheel rim 8 is provided with a plurality of fixing holes for installing spokes, such as fixing holes 81. The wheel rim 8 is provided with an air nozzle assembly 85.

[0059] The wheel rim 8 is assembled with a hub assembly at the center through a plurality of carbon spokes. The hub assembly includes a hub 2 and a freehub 4. The hub shell 2 is provided with a first spoke disc 20 and a second spoke disc 30 at both ends. For example, the first connecting end 51 of the carbon spoke 5 together with the assembly part 6, 7 or 9 is clamped in the spoke ear 36 of the hub 2, and the second connecting end 52 is installed on the corresponding fixing hole 81 of the wheel rim 8 through the threaded end 53.

[0060] In this embodiment, each spoke lug may be provided with two spokes at the front and rear end surfaces. For example, the spoke 5 is provided at the outer end surface of the spoke lug 36 , and the spoke 5 ′ is provided at the inner end surface of the spoke lug 36 .

[0061] The spokes 5, the hub and the freewheel base structure in the rim are the same as described above and will not be described in detail.

[0062] This embodiment also relates to a bicycle, including a frame and a bicycle wheel rim 8 mounted on the frame. In the bicycle transmission, pedaling drives the chain plate, the chain drives the flywheel, the flywheel drives the freewheel base 4, the ratchet assembly in the freewheel base 4 drives the coupling gear ring, the coupling gear ring drives the hub 2, and the hub 2 finally drives the wheel to rotate through the spokes.

[0063] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A spoke anti-rotation assembly, characterized in that: The invention comprises a connector, in which an installation cavity for cooperating with a bicycle spoke is formed, a limiting cap is arranged on the top of the connector, a first limiting straight edge and a second limiting straight edge are protruding from the limiting cap or the connector, the first limiting straight edge and the second limiting straight edge are parallel to each other, and are used to press against the spoke groove of the hub from both sides to prevent the spoke from rotating.

2. The spoke anti-rotation assembly according to claim 1, characterized in that: The first limiting straight edge and the second limiting straight edge are two side edges of the square protrusion extending from the limiting cap; or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap, and the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connecting body, and the first limiting straight edge and the second limiting straight edge are two side edges of the limiting block.

3. An anti-rotation spoke, characterized in that: The invention comprises a main body, a first connecting end, a second connecting end and an assembling part, wherein the first connecting end fixes the assembling part and is clamped on the spoke disk of the hub, and the second connecting end is connected to the wheel rim. The assembling part comprises a connecting body, in which an installation cavity for cooperating with the first connecting end is formed, and a limiting cap is arranged on the top of the connecting body. A first limiting straight edge and a second limiting straight edge are protruding from the limiting cap or the connecting body, and the first limiting straight edge and the second limiting straight edge are parallel to each other and are used to press against the spoke grooves of the spoke disk from both sides to prevent the spokes from rotating.

4. The anti-rotation spoke according to claim 3, characterized in that: The first limiting straight edge and the second limiting straight edge are two side edges of the square protrusion of the limiting cap; or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap, and the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connecting body, and the first limiting straight edge and the second limiting straight edge are two side edges of the limiting block.

5. A hub, characterized in that: The hub shell comprises a first spoke disk and a second spoke disk respectively arranged at two ends of the hub shell, the first spoke disk and the second spoke disk respectively comprise a plurality of spoke ears, each spoke ear is respectively provided with a limiting groove and a connected spoke groove on the front and rear end surfaces, and an assembly part is installed in each pair of the limiting grooves and the spoke grooves; the assembly part comprises a limiting cap and a connector which are inserted into the corresponding limiting grooves, a first limiting straight edge and a second limiting straight edge are protruding from the limiting cap or the connector, the first limiting straight edge and the second limiting straight edge are parallel to each other, and are used to press against the corresponding spoke grooves from both sides to prevent the spokes from rotating.

6. The hub according to claim 5, characterized in that: A first limiting groove and a first spoke groove connected to the first limiting groove are formed on one end face of each spoke ear, and a second limiting groove and a second spoke groove connected to the second limiting groove are formed on the other end face, and the outlet direction of the second spoke groove is opposite to the outlet direction of the first spoke groove; each assembly part includes a connector, an installation cavity for installing the spoke is formed in the connector, a limiting cap is arranged on the top of the connector, and the first limiting straight edge and the second limiting straight edge are protrudingly arranged on the limiting cap or the connector.

7. The hub according to claim 5, characterized in that: The first limiting straight edge and the second limiting straight edge are two side edges of the square protrusion of the limiting cap; or the first limiting straight edge is the outer side edge of the first protrusion extending from the limiting cap, and the second limiting straight edge is the outer side edge of the second protrusion extending from the limiting cap; or a limiting block is provided on the connecting body, and the first limiting straight edge and the second limiting straight edge are two side edges of the limiting block.

8. A wheel hub assembly, comprising a hub and a freehub, characterized in that: The hub includes a hub shell, and a first spoke disk and a second spoke disk are respectively arranged at two ends of the hub shell, and the first spoke disk and the second spoke disk respectively include a plurality of spoke ears, and each spoke ear is respectively provided with a limiting groove and a connected spoke groove on the front and rear end surfaces, and assembly parts are installed in the limiting groove and the spoke groove; the assembly parts include a limiting cap and a connecting body which are inserted into the corresponding limiting groove, and a first limiting straight edge and a second limiting straight edge are protruding from the limiting cap or the connecting body, and the first limiting straight edge and the second limiting straight edge are parallel to each other and are used to press against the corresponding spoke groove from both sides to prevent the spokes from rotating.

9. The wheel hub assembly according to claim 8, characterized in that: A first limiting groove and a first spoke groove connected to the first limiting groove are formed on one end face of each spoke ear, and a second limiting groove and a second spoke groove connected to the second limiting groove are formed on the other end face, and the outlet direction of the second spoke groove is opposite to the outlet direction of the first spoke groove; each assembly part includes a connector, an installation cavity for installing the spoke is formed in the connector, a limiting cap is arranged on the top of the connector, and the first limiting straight edge and the second limiting straight edge are protrudingly arranged on the limiting cap or the connector.

10. A bicycle wheel rim, comprising a wheel rim and a hub assembly located at the center of the wheel rim, characterized in that: The hub assembly includes a hub and a freehub as described in any one of claims 5 to 7.

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