Spoke

Abstract

The utility model relates to a spoke which comprises a spoke body, a cap head and a tooth cap, the cap head and the tooth cap are connected to the two ends of the spoke body, the cap head and the tooth cap are used for being connected with a hub and a rim respectively, a first conical hole is formed in the cap head, a second conical hole is formed in the tooth cap, and the two ends of the spoke body are in tight fit with the conical surfaces of the first conical hole and the second conical hole respectively. The cap head comprises a columnar main body and a flange annularly arranged on the periphery of the main body, the main body comprises a cap head front end and a cap head rear end in the axial direction, the flange is closer to the cap head front end, and the rear end of the flange is of a convex arc-shaped inclined structure gradually approaching the peripheral surface of the main body backwards; the front end of the flange is obliquely connected to the peripheral face of the body in the mode that the front end of the flange gradually gets close to the body forwards, a distance H is formed between the termination portion of the front end of the flange and the front end of the cap head, and the front end of the flange and the peripheral face of the body are in transition through a downwards-concave chamfer. The tensile strength of the flange is improved, and the service life of the cap head is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessories, specifically to a spoke. Background Technology

[0002] Existing connectors on carbon fiber spokes (including nut caps for connecting to rims and nut caps for connecting to hubs) are typically glued to the carbon fiber spoke body. While this method is convenient, the connection strength is unstable, quality is difficult to control, and there is a risk of the connectors separating from the spoke body under long-term use. Therefore, the requirements for process control and adhesive bonding are particularly high. Furthermore, the nut caps in existing technologies have relatively low strength and short service life. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a structurally optimized spoke structure.

[0004] This utility model is achieved using the following technical solution:

[0005] This utility model proposes a spoke, including a spoke body and a cap and a toothed cap connected to both ends of the spoke body. The cap and toothed cap are used to connect the hub and the rim, respectively. The cap has a first conical hole, and the toothed cap has a second conical hole. The two ends of the spoke body are respectively fitted with the conical surfaces of the first and second conical holes for tight fit. The cap includes a columnar body and a flange arranged around the outer periphery of the body. The body includes a front end and a rear end of the cap in the axial direction. The flange is closer to the front end of the cap. The rear end of the flange is a convex arc-shaped inclined structure that gradually approaches the outer periphery of the body. The front end of the flange is inclined and connected to the outer periphery of the body in a manner that gradually approaches the body. The termination of the front end of the flange and the front end of the cap have a distance H. The front end of the flange and the outer periphery of the body are transitioned by a concave chamfer.

[0006] Preferably, the axial length of the main body is between 10mm and 14mm, and the spacing H is between 0.4mm and 0.7mm.

[0007] Preferably, the radius of the chamfer is between 0.1 mm and 1.5 mm.

[0008] Preferably, the first tapered hole and / or the second tapered hole are several channels with different tapers.

[0009] Preferably, the spoke body is made of carbon fiber.

[0010] This invention offers the following advantages: The cap and lugs of this invention can be fixedly connected to the end of the spoke body without the need for adhesives, facilitating subsequent connection of the cap and lugs to the corresponding rims and hubs. Furthermore, the anti-detachment and limiting structure formed by the conical fit between the cap and lugs and the spoke body effectively prevents the cap and lugs from detaching from the end of the spoke body. Additionally, this invention further improves the flange structure to increase its tensile strength and extend the service life of the cap. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the spokes in the embodiment;

[0012] Figure 2 This is a three-dimensional schematic diagram of the cap head in the embodiment;

[0013] Figure 3 This is a cross-sectional view of the cap head in the embodiment;

[0014] Figure 4 This is a three-dimensional schematic diagram of the dental cap in the embodiment;

[0015] Figure 5 This is a cross-sectional view of the tooth cap in the embodiment. Detailed Implementation

[0016] 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.

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0018] See Figure 1-5As shown in the preferred embodiment of this utility model, a spoke is provided, including a spoke body 3 and a cap 1 and a toothed cap 2 connected to both ends of the spoke body 3. The cap 1 and the toothed cap 2 are used to connect the bicycle hub and the rim, respectively. The spoke body 3 can be a spoke commonly used in the art, such as a flat spoke or a round spoke. The spoke body 3 can be made of metal or reinforced materials such as carbon fiber. The toothed cap 2 has a threaded section formed on its outer periphery for locking onto the rim with a threaded connector. The head cap 1 has a first conical hole 11, and the tooth cap 2 has a second conical hole 21. The two ends of the spoke body 3 are respectively fitted with the conical surfaces of the first conical hole 11 and the second conical hole 21 for tight fit. For example, the two ends of the spoke body 3 can be inserted into the first conical hole 11 and the second conical hole 21, and then the spoke body 3 can be expanded by fiber and cured with epoxy resin to form a conical head, or the conical head can be formed by thickening the yarn. Then the head cap 1 and the tooth cap 2 can be tightened or pulled out to form an interference fit. For another example, conical or shuttle-shaped support members can be placed at both ends of the spoke body 3 to open it up and form a conical head, so as to achieve the conical fit between the spoke body 3 and the head cap 1 and the tooth cap 2. This conical surface fit allows the cap 1 and the toothed cap 2 to be fixedly connected to the end of the spoke body 3 without the need for adhesive, so that the cap 1 and the toothed cap 2 can be connected to the corresponding rim and hub in subsequent processes. At the same time, the conical fit between the cap 1 and the toothed cap 2 and the spoke body 3 forms an anti-detachment limiting structure, which can effectively prevent the cap 1 and the toothed cap 2 from coming off the end of the spoke body 3.

[0019] To improve fastening, it is preferable that the first tapered hole 11 and / or the second tapered hole 21 are configured as several channels with different tapers.

[0020] See Figure 3 The cap head 1 includes a columnar body 10 and a flange 12 surrounding the outer periphery of the body 10. The flange 12 serves as an anchoring part when the cap head 1 is connected to the hub, which can improve the stability of the connection between the cap head 1 and the hub. In addition, the structure of the flange 12 is further improved in this embodiment to increase the tensile strength of the flange 12 and the service life of the cap head 1. Specifically, the body 10 includes a cap head front end 101 and a cap head rear end 102 in the axial direction. The flange 12 is closer to the cap head front end 101. The rear end 121 of the flange is a convex arc-shaped inclined structure that gradually approaches the outer peripheral surface of the body 10. The front end 122 of the flange is inclinedly connected to the outer peripheral surface of the body 10 in a manner that gradually approaches the body 10. The termination of the front end 122 of the flange and the front end 101 of the cap head have a distance H. The front end 122 of the flange and the outer peripheral surface of the body 10 are transitioned by a concave chamfer 13. With this design, the front end of the cap 1 forms a stepped section, which can avoid stress concentration. In addition, the inclined design of the front end 122 of the flange and the chamfer 13 effectively improve the strength and stability of the flange 12.

[0021] In this embodiment, the axial length of the main body 10 is between 10mm and 14mm, the spacing H is between 0.4mm and 0.7mm, and the radius of the chamfer 13 is between 0.1mm and 1.5mm. Actual measurements show that within these ranges, the strength of the cap 1 can be improved while also considering its manufacturability and cost.

[0022] Furthermore, a first rivet and a second rivet can be inserted into the cap 1 and the toothed cap 2 respectively to expand / bias the two ends of the spoke body 3, so that the spoke body 3 is more securely locked in the cap 1 and the toothed cap 2, preventing the spoke body 3 from coming off during bumps. The first rivet and the second rivet can be fixed by riveting.

[0023] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A spoke, comprising a spoke body and a crown and a bead connected to both ends of the spoke body, the crown and the bead being used to connect a hub and a rim, respectively, characterized in that: The cap head has a first conical hole, and the tooth cap has a second conical hole. The two ends of the spoke body are respectively fitted with the conical surfaces of the first and second conical holes. The cap head includes a columnar body and a flange surrounding the outer periphery of the body. The body includes an axially oriented front end and a rear end. The flange is closer to the front end of the cap head. The rear end of the flange is a convex arc-shaped inclined structure that gradually approaches the outer periphery of the body. The front end of the flange is inclinedly connected to the outer periphery of the body in a manner that gradually approaches the body forward. The termination of the front end of the flange and the front end of the cap head have a distance H. The front end of the flange and the outer periphery of the body are transitioned by a concave chamfer.

2. The spokes according to claim 1, characterized in that: The axial length of the main body is between 10mm and 14mm, and the spacing H is between 0.4mm and 0.7mm.

3. The spokes according to claim 1, characterized in that: The radius of the chamfer is between 0.1mm and 1.5mm.

4. The spokes according to claim 1, characterized in that: The first tapered hole and / or the second tapered hole are several channels with different tapers.

5. The spokes according to claim 1, characterized in that: The spoke body is made of carbon fiber.

6. The spokes according to claim 1, characterized in that: The first rivet and the second rivet are respectively screwed and fixed inside the cap and the tooth cap to secure the two ends of the spoke body.

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