A bicycle carbon spoke, a bicycle wheel and a bicycle
By combining the carbon fiber spoke body with the axial extension component and incorporating an anti-detachment structure, the problem of carbon fiber spokes being incompatible with universal hubs was solved, resulting in improved strength and reliability while reducing weight and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN BAIYEXING OUTDOOR PROD CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-10
Smart Images
Figure CN224476765U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bicycle spoke technology, and in particular to a bicycle carbon spoke, a bicycle wheel, and a bicycle. Background Technology
[0002] Traditional stainless steel spokes are heavy, costly, and inefficient to produce, making their upgrading imperative. To address this, carbon fiber spokes (referred to as "carbon spokes"), designed for lightweighting and high strength, have emerged.
[0003] Existing carbon spokes typically consist of a carbon fiber rod connected to two metal parts at either end. One metal part is the hub cap, and the other is the rim cap. However, this design has several drawbacks: the metal parts connecting the hub and rim often use an outer sleeve structure, directly fitted onto the carbon rod. This design not only results in an excessively large radial dimension at the joint, increasing weight and cost, but more importantly, the hub cap is incompatible with standard hubs, requiring a dedicated, typically heavier, hub. This largely negates the core lightweight advantage of carbon materials, severely limiting its market application due to poor compatibility. Furthermore, from a structural mechanics perspective, the overall strength and reliability of current carbon spokes still have room for improvement. Utility Model Content
[0004] Therefore, in response to at least one of the above problems, this utility model provides a bicycle carbon spoke, a bicycle wheel, and a bicycle.
[0005] This utility model is achieved using the following solution:
[0006] This utility model proposes a carbon spoke for bicycles, including a carbon fiber spoke body and an axial extension member. The axial extension member extends at least along the entire length of the carbon fiber spoke body. The carbon fiber spoke body is coupled to the axial extension member. At least one of a cap and a lug cap is integrally provided on the axial extension member.
[0007] In one embodiment, the axial extension is used as an inner core structure and is axially disposed through the carbon fiber spoke body.
[0008] In one embodiment, the axial extension has inverted tapered sections at both ends, and the diameter of the inverted tapered sections gradually increases from the center of the axial extension toward both ends, so that the axial extension has a structure that is thin in the middle and thick at both ends.
[0009] In one embodiment, an anti-detachment structure is further provided on the surface of the axial extension that is coupled to the carbon fiber spoke body.
[0010] In one embodiment, the axial extension has inverted tapered sections at both ends, and an anti-detachment structure is provided on the surface of the axial extension that is engaged with the carbon fiber spoke body. The anti-detachment structure is provided on the surface of the inverted tapered section.
[0011] In one embodiment, the anti-detachment structure includes a boss portion disposed on the surface of the axial extension member; or,
[0012] The anti-detachment structure includes a stepped portion disposed on the surface of the axial extension member, the stepped surface of the stepped portion being disposed opposite to the center of the bicycle carbon spokes.
[0013] In one embodiment, the boss portion is an annular boss structure with a rectangular cross-section, and multiple boss portions are provided, which are distributed along the length direction of the axial extension member; the step portion is an annular step structure, and multiple step portions are provided, which are distributed along the length direction of the axial extension member.
[0014] In one embodiment, the anti-detachment structure includes a protrusion disposed on the outer surface of the axial extension member, the protrusion being generally teardrop-shaped; or, the anti-detachment structure includes a wave structure disposed on the outer surface of the axial extension member.
[0015] This utility model also proposes a bicycle wheel, including a rim, a hub, and a tire mounted on the rim; characterized in that it further includes a plurality of bicycle carbon spokes as described in any of the preceding claims, wherein the caps of the bicycle carbon spokes are used to connect to the hub, and the tooth caps of the bicycle carbon spokes are used to connect to the rim.
[0016] This utility model also proposes a bicycle, including the bicycle wheel as described above.
[0017] The technical solution provided by this utility model has the following technical effects:
[0018] 1. This utility model provides a bicycle carbon spoke, a bicycle wheel, and a bicycle. The bicycle carbon spoke includes a carbon fiber spoke body and an axial extension member. The axial extension member extends at least along the entire length of the carbon fiber spoke body. The carbon fiber spoke body is integrated with the axial extension member. At least one of a cap and a lug cap is integrally provided on the axial extension member, which can enhance the overall strength and reliability of the carbon spoke. Thus, while maintaining the lightweight characteristics of the carbon spoke, it greatly improves the tensile strength of the entire carbon spoke. It also allows the cap to be adapted to ordinary hubs without the need for a special hub, and the manufacturing process is simple.
[0019] 2. An anti-detachment structure is also provided on the surface of the axial extension that is bonded to the carbon fiber spoke body. The anti-detachment structure can further increase the bonding force between the carbon fiber spoke body and the axial extension. After the carbon fiber spoke body is cured, its inner surface is tightly fitted with the axial extension, so that the carbon fiber spoke body and the axial extension are firmly bonded together. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a bicycle carbon spoke according to the first embodiment of this utility model;
[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0022] Figure 3 yes Figure 1 Enlarged view of point B in the middle;
[0023] Figure 4 This is a front view of the axial extension of this embodiment;
[0024] Figure 5 This is a schematic diagram of the structure of a bicycle carbon spoke according to the second embodiment of this utility model;
[0025] Figure 6 yes Figure 5 Enlarged view of point C in the middle;
[0026] Figure 7 yes Figure 5 Enlarged view of point D in the middle;
[0027] Figure 8 This is a schematic diagram of the structure of a bicycle carbon spoke according to the third embodiment of this utility model;
[0028] Figure 9 yes Figure 8 Enlarged view at point E in the middle;
[0029] Figure 10 yes Figure 8 Enlarged view at point F;
[0030] Figure 11 This is a schematic diagram of the structure of a bicycle carbon spoke according to the fourth embodiment of this utility model;
[0031] Figure 12 yes Figure 11 Enlarged view of point G in the middle;
[0032] Figure 13 yes Figure 11 Enlarged view of point H in the middle;
[0033] Figure 14 This is a schematic diagram of the structure of a bicycle carbon spoke according to the fourth embodiment of this utility model;
[0034] Figure 15 yes Figure 14 Enlarged view of point J in the middle;
[0035] Figure 16 yes Figure 14 A magnified view of point K in the middle. Detailed Implementation
[0036] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0037] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0038] Example 1
[0039] like Figures 1-4 As shown, this embodiment provides a bicycle carbon spoke 1, including a carbon fiber spoke body 10 and an axial extension 20. The axial extension 20 extends at least along the entire length of the carbon fiber spoke body 10. The carbon fiber spoke body 10 is integrated with the axial extension 20. A cap 21 and a bead 22 are integrally formed on the axial extension 20, with the cap 21 and bead 22 located at opposite ends of the axial extension 20. Because the cap 21 and bead 22 are integrally formed on the axial extension 20, the overall strength and reliability of the carbon spoke are enhanced. This significantly improves the tensile strength of the entire carbon spoke while maintaining its lightweight characteristics. Furthermore, the cap 21 can be adapted to ordinary hubs without the need for a dedicated hub. Moreover, this structure consists of only two parts: the carbon fiber spoke body 10 and the axial extension 20, simplifying the manufacturing process. In other embodiments, one of the cap 21 and bead 22 is integrally formed on the axial extension 20, which is also a feasible technical solution.
[0040] In this embodiment, the axial extension 20 is used as the inner core structure. The axial extension 20 is axially inserted through the carbon fiber spoke body 10, meaning the carbon fiber spoke body 10 covers the axial extension 20, and both ends of the axial extension 20 are exposed, allowing the hub 21 and spoke 22 to be exposed, thus facilitating connection to the hub or rim. Of course, in some other embodiments, the carbon fiber spoke body 10 may also be located on one side of the axial extension 20 and integrated with it. This embodiment uses the axial extension 20 as the inner core structure, with the carbon fiber spoke body 10 covering the axial extension 20. This structure has good mechanical properties, achieves optimal lightweighting, and is easy to manufacture. The carbon fiber spoke body 10 can be easily shaped to obtain more functions, such as reducing wind resistance.
[0041] In this embodiment, the axial extension 20 has a structure that is thinner in the middle and thicker at both ends. This allows the middle part of the axial extension 20 to be made thinner based on the same size of bicycle carbon spoke 1, thereby further improving the lightweight effect of bicycle carbon spoke 1 and reducing material costs. In addition, it also helps to increase the bonding force between the carbon fiber spoke body 10 and the axial extension 20, making it less likely for the carbon fiber spoke body 10 to slide on the axial extension 20.
[0042] In this embodiment, the axial extension 20 is provided with inverted tapered sections 201 at both ends. The diameter of the inverted tapered sections 201 gradually increases from the center of the axial extension 20 toward both ends, so that the axial extension 20 presents a structure that is thin in the middle and thick at both ends.
[0043] Reference Figures 1-3 An anti-detachment structure 3 is also provided on the surface of the axial extension 20 that is bonded to the carbon fiber spoke body 10. The anti-detachment structure 3 can further increase the bonding force between the carbon fiber spoke body 10 and the axial extension 20. After the carbon fiber spoke body 10 is cured, its inner side is tightly fitted with the axial extension 20, so that the carbon fiber spoke body 10 and the axial extension 20 are firmly bonded together.
[0044] The surfaces of the inverted tapered sections 201 at both ends of the axial extension 20 are provided with anti-detachment structures 3. The two ends of the axial extension 20 are fastened to the inner wall of the carbon fiber spoke body 10 through the anti-detachment structures 3 on the surface of the inverted tapered sections 201, which can improve the bonding force between the axial extension 20 and the carbon fiber spoke body 10, thereby greatly improving the tensile strength of the entire carbon spoke 1.
[0045] In this embodiment, as Figure 2As shown, the anti-detachment structure 3 includes a boss portion 23 disposed on the outer surface of the axial extension member 20. The boss portion 23 can be an annular boss structure, such as an annular boss structure with a rectangular cross-section. Of course, in some other embodiments, the boss portion 23 can also be a separate boss structure, or the cross-section of the boss portion 23 can also be other shapes, such as trapezoids.
[0046] In this embodiment, multiple bosses 23 can be provided, and the multiple bosses 23 are distributed along the length direction of the axial extension 20, thereby further enhancing the bonding effect.
[0047] Example 2
[0048] Please see Figures 5-7 As shown, this embodiment provides a bicycle carbon spoke 1a, which differs from Embodiment 1 above in that: the anti-detachment structure 3 includes a stepped portion 24 disposed on the outer surface of the axial extension member 20a, with the stepped surface of the stepped portion 24 facing away from the middle of the bicycle carbon spoke 1a. The stepped portion 24 can increase the bonding force between the carbon fiber spoke body 10 and the axial extension member 20a. After the carbon fiber spoke body 10 is cured, its inner surface is tightly fitted with the axial extension member 20a, so that the carbon fiber spoke body 10 and the axial extension member 20a are firmly bonded together.
[0049] In this embodiment, the surfaces of the inverted conical sections 201 at both ends of the axial extension 20a are provided with stepped portions 24. The two ends of the axial extension 20a are fastened to the inner wall surface of the carbon fiber spoke body 10 through the stepped portions 24, which can improve the bonding force between the axial extension 20a and the carbon fiber spoke body 10, thereby greatly improving the tensile strength of the entire carbon spoke 1a.
[0050] In this embodiment, the step portion 24 can be an annular step structure, and multiple step portions 24 can be provided. Multiple step portions 24 are distributed along the length direction of the axial extension 20a, thereby further enhancing the bonding effect.
[0051] Example 3
[0052] Please see Figures 8-10 As shown, this embodiment provides a bicycle carbon spoke 1b, which differs from Embodiment 1 above in that: the anti-detachment structure 3 includes a protrusion 25 disposed on the outer surface of the axial extension 20b. The protrusion 25 can increase the bonding force between the carbon fiber spoke body 10 and the axial extension 20b. After the carbon fiber spoke body 10 is cured, its inner surface is tightly fitted with the axial extension 20b, so that the carbon fiber spoke body 10 and the axial extension 20b are firmly bonded together. The protrusion 25 can be entirely teardrop-shaped, thereby enhancing the bonding force with the carbon fiber spoke body 10 while allowing the teardrop-shaped protrusion 25 to fit more tightly with the carbon fiber spoke body 10, resulting in a better molding effect.
[0053] In this embodiment, the surfaces of the inverted conical sections 201 at both ends of the axial extension 20b are provided with protrusions 25. The two ends of the axial extension 20b are fastened to the inner wall surface of the carbon fiber spoke body 10 through the protrusions 25, which can improve the bonding force between the axial extension 20b and the carbon fiber spoke body 10, thereby greatly improving the tensile strength of the entire carbon spoke 1b.
[0054] Example 4
[0055] Please see Figures 11-13 As shown, this embodiment provides a bicycle carbon spoke 1c, which differs from the above embodiment 1 in that: the anti-detachment structure 3 includes a wave structure 26 disposed on the outer surface of the axial extension 20c. The wave structure 26 can increase the bonding force between the carbon fiber spoke body 10 and the axial extension 20c. After the carbon fiber spoke body 10 is cured, its inner side is tightly fitted with the axial extension 20c, so that the carbon fiber spoke body 10 and the axial extension 20c are firmly bonded together.
[0056] In this embodiment, the surfaces of the inverted conical sections 201 at both ends of the axial extension 20c are provided with wave structures 26. The two ends of the axial extension 20c are fastened to the inner wall surface of the carbon fiber spoke body 10 through the wave structures 26, which can improve the bonding force between the axial extension 20c and the carbon fiber spoke body 10, thereby greatly improving the tensile strength of the entire carbon spoke 1c.
[0057] Example 5
[0058] Please see Figures 14-16 As shown, this embodiment provides a bicycle carbon spoke 1d, which differs from the above embodiment 1 in that: the anti-detachment structure 3 includes a large wave structure 27 disposed on the outer surface of the axial extension 20d. The large wave structure 27 can increase the bonding force between the carbon fiber spoke body 10 and the axial extension 20d. After the carbon fiber spoke body 10 is cured, its inner side is tightly fitted with the axial extension 20d, so that the carbon fiber spoke body 10 and the axial extension 20d are firmly bonded together.
[0059] In this embodiment, the surfaces of the inverted conical sections 201 at both ends of the axial extension 20d are provided with large wave structures 27. The two ends of the axial extension 20d are fastened to the inner wall surface of the carbon fiber spoke body 10 through the large wave structures 27, which can improve the bonding force between the axial extension 20d and the carbon fiber spoke body 10, thereby greatly improving the tensile strength of the entire carbon spoke 1d.
[0060] Example 6
[0061] This embodiment provides a bicycle wheel, including a rim, a hub, and a tire mounted on the rim; it also includes a plurality of bicycle carbon spokes 1 (1a, 1b, 1c, or 1d) as described in any previous embodiment, wherein the caps 21 of the bicycle carbon spokes 1 (1a, 1b, 1c, or 1d) are used to connect to the hub, and the tooth caps 22 of the bicycle carbon spokes 1 (1a, 1b, 1c, or 1d) are used to connect to the rim.
[0062] Example 7
[0063] This embodiment provides a bicycle, including bicycle wheels as described in Embodiment 6.
[0064] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.
Claims
1. A bicycle carbon spoke, comprising a carbon fiber spoke body, characterized in that, It also includes an axial extension that extends at least along the entire length of the carbon fiber spoke body, the carbon fiber spoke body being coupled to the axial extension, and the axial extension having at least one of a cap and a toothed cap integrally provided thereon.
2. The bicycle carbon spokes according to claim 1, characterized in that: The axial extension is used as an inner core structure and is axially disposed through the carbon fiber spoke body.
3. The bicycle carbon spokes according to claim 1, characterized in that: The axial extension has inverted tapered sections at both ends, and the diameter of the inverted tapered sections gradually increases from the center of the axial extension toward both ends, so that the axial extension has a structure that is thin in the middle and thick at both ends.
4. The bicycle carbon spokes according to claim 1, characterized in that: An anti-detachment structure is also provided on the surface of the axial extension that is coupled to the carbon fiber spoke body.
5. The bicycle carbon spoke according to claim 4, characterized in that: The axial extension has inverted tapered sections at both ends, and an anti-detachment structure is provided on the surface of the axial extension that is combined with the carbon fiber spoke body. The anti-detachment structure is provided on the surface of the inverted tapered section.
6. The bicycle carbon spoke according to claim 4 or 5, characterized in that: The anti-detachment structure includes a boss portion disposed on the surface of the axial extension member; or, The anti-detachment structure includes a stepped portion disposed on the surface of the axial extension member, the stepped surface of the stepped portion being disposed opposite to the center of the bicycle carbon spokes.
7. The bicycle carbon spoke according to claim 6, characterized in that: The boss portion is a ring-shaped boss structure with a rectangular cross-section, and multiple boss portions are provided, which are distributed along the length direction of the axial extension member; the step portion is a ring-shaped step structure, and multiple step portions are provided, which are distributed along the length direction of the axial extension member.
8. The bicycle carbon spokes according to claim 4 or 5, characterized in that: The anti-detachment structure includes a protrusion on the outer surface of the axial extension member, the protrusion being generally teardrop-shaped; or, the anti-detachment structure includes a wave structure on the outer surface of the axial extension member.
9. A bicycle wheel, comprising a rim, a hub, and a tire mounted on the rim; characterized in that: It also includes a plurality of bicycle carbon spokes as described in any one of claims 1-8, wherein the cap of the bicycle carbon spoke is used to connect to the hub, and the tooth cap of the bicycle carbon spoke is used to connect to the rim.
10. A bicycle, characterized in that: Including the bicycle wheel as described in claim 9.