A cap structure of a carbon fiber spoke

Abstract

This utility model discloses a cap structure for carbon fiber spokes, relating to the field of carbon fiber spoke technology. Its main feature is that the cap has a through hole coaxially formed for mounting the spoke body. The cap and the spoke body are bonded and fixed together by an adhesive layer. An annular groove is provided within the through hole, and the adhesive layer is embedded in the annular groove. This application has the effect of improving the connection strength between the cap and the spoke body.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber technology, and in particular to a hat head structure for carbon fiber spokes. Background Technology

[0002] Currently, carbon fiber spokes are made of carbon fiber as the core material and are used as supporting components to connect bicycle hubs and rims. They mainly consist of the spoke body with a carbon fiber core and the toothed caps and caps installed at both ends of the spoke body.

[0003] In existing technologies, to improve the connection strength between the spoke body and the crown and head, tapered joints are often formed at both ends of the spoke body, and matching tapered grooves are provided inside the crown and head. The tapering action is used to improve the connection strength between the spoke body and the crown and head.

[0004] However, in actual use, this structure, which relies solely on the tapered shape to enhance strength, is still prone to slippage, and therefore requires improvement. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a hat head structure with carbon fiber spokes, which can improve the connection strength between the hat head and the spoke body.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A cap structure for carbon fiber spokes, wherein the cap has a through hole for mounting the spoke body, an adhesive layer is disposed between the cap and the spoke body, an annular groove is disposed in the through hole, and the adhesive layer is embedded in the annular groove.

[0008] By adopting the above technical solution, the adhesive connection structure between the cap and the spoke body, combined with the interlocking effect of the adhesive layer and the annular groove, forms a mechanically interlocking force, which increases the friction between the cap and the spoke body and improves the connection strength between the cap and the spoke body.

[0009] In one possible implementation, the annular groove has a V-shaped cross-section, and the annular groove through holes are evenly distributed circumferentially along the axis of the inner wall of the cap. The annular groove has several channels evenly distributed along its axial direction.

[0010] By adopting the above technical solution, the V-shaped annular groove, taking advantage of its structural characteristics, is easy to form when processing the annular groove.

[0011] In one possible implementation, the annular grooves are distributed along the axial direction of the cap, and any two adjacent annular grooves are intersected.

[0012] By adopting the above technical solution, the adjacent annular grooves are arranged in a cross shape, forming a structure in which the cross grooves and the adhesive layer are subjected to cross forces, which can further improve the connection strength between the cap and the spoke body.

[0013] In one possible implementation, the cap head includes a connecting portion and a joint portion, the connecting portion being columnar, and the joint portion being located at the end of the connecting portion away from the spoke body, the joint portion having a convex cross-section.

[0014] By adopting the above technical solution, the design of the connecting part can ensure the contact area between the spoke body and the cap, and the convex shape of the joint can improve the smoothness of the cap engagement.

[0015] In one possible implementation, the wall thickness of the connecting portion gradually decreases from one end of the joint portion to the other end, and the wall thickness of the connecting portion at the end away from the joint portion is greater than or equal to 1 mm.

[0016] By adopting the above technical solution, and by setting the wall thickness of the connecting part to gradually decrease from one end of the joint to the other end, the weight of the cap can be reduced while ensuring the contact area and strength between the connecting part and the spoke body. This is especially important in the field of lightweight carbon fiber spokes.

[0017] In one possible implementation, the groove depth of the annular groove is less than 0.2 mm.

[0018] By adopting the above technical solution, the thickness of the annular groove needs to be controlled within 0.2 mm. If it is too large, it will have a significant impact on the strength and stability of the inner wall structure of the cap.

[0019] Compared with existing technologies, the advantages of this utility model are:

[0020] 1. Through the adhesive connection structure between the cap and the spoke body, combined with the interlocking effect of the adhesive layer and the annular groove, a mechanical interlocking force is formed, which increases the friction between the cap and the spoke body and improves the connection strength between the cap and the spoke body.

[0021] 2. The adjacent annular grooves are arranged in a cross shape, forming a cross-stress structure with the adhesive layer, which can further improve the connection strength between the cap and the spoke body;

[0022] 3. By setting the wall thickness of the connector to gradually decrease from one end of the joint to the other, the weight of the cap can be reduced while ensuring the contact area and strength between the connector and the spoke body. This is especially important in the field of lightweight carbon fiber spokes. Attached Figure Description

[0023] Figure 1This is a schematic cross-sectional view of the cap installation in Embodiment 1 of this application;

[0024] Figure 2 This is a cross-sectional schematic diagram of the cap head of Embodiment 1 of this application;

[0025] Figure 3 This is a cross-sectional schematic diagram of the cap head of Embodiment 2 of this application;

[0026] Figure 4 This is a cross-sectional schematic diagram of the cap head of Embodiment 3 of this application.

[0027] Explanation of the labels in the diagram:

[0028] 1. Hat head; 101. Connecting part; 102. Joint part; 2. Spoke body; 3. Through hole; 4. Adhesive layer; 5. Annular groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail below. An embodiment of this application discloses a cap structure with carbon fiber spokes.

[0030] Example 1:

[0031] Reference Figure 1 , Figure 2 The cap head 1 has a through hole 3 coaxially provided for the installation of the spoke body 2. The cap head 1 and the spoke body 2 are bonded and fixed together by an adhesive layer 4. An annular groove 5 is provided in the through hole 3, and the adhesive layer 4 is embedded in the annular groove 5.

[0032] The annular groove 5 has a V-shaped cross section. The annular groove 5 and the annular through hole 3 are evenly distributed around the inner wall of the cap head 1. The annular groove 5 has several channels evenly distributed along its axial direction. In this embodiment, three channels are provided.

[0033] The cap head 1 includes a connecting part 101 and a joint part 102. The connecting part 101 is hollow and cylindrical. The joint part 102 is located at the end of the connecting part 101 away from the spoke body 2. The cross-section of the joint part 102 is convex.

[0034] Specifically, the groove depth of the annular groove 5 is less than 0.2 mm.

[0035] The implementation principle of Example 1 is as follows: an annular groove 5 is machined out in the head 1, an adhesive layer 4 is coated on the spoke body 2, and it is installed into the through hole 3 of the head 1 for curing and fixing.

[0036] Example 2:

[0037] Reference Figure 3The difference from Embodiment 1 is that the annular groove 5 is provided with several channels along the axial direction of the cap head 1, and any two adjacent annular grooves 5 are intersected. In this embodiment, the annular groove 5 is provided with four channels.

[0038] The implementation principle of Example 2 is different from that of Example 1 in that the structure of the annular groove 5 is different.

[0039] Example 3:

[0040] Reference Figure 4 The difference from Embodiment 1 is that the wall thickness of the connecting part 101 gradually decreases from one end of the joint part 102 to the other end, and the wall thickness of the connecting part 101 at the end away from the joint part 102 is greater than or equal to 1 mm.

[0041] The implementation principle of Example 3 is different from that of Example 1 in that the structure of the connecting part 101 is different.

[0042] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A hat head structure with carbon fiber spokes, characterized in that, The cap (1) is provided with a through hole (3) for mounting the spoke body (2). An adhesive layer (4) is provided between the cap (1) and the spoke body (2). An annular groove (5) is provided in the through hole (3), and the adhesive layer (4) is embedded in the annular groove (5).

2. The cap structure with carbon fiber spokes according to claim 1, characterized in that, The annular groove (5) has a V-shaped cross section. The annular groove (5) has an annular through hole (3) evenly distributed around the inner wall of the cap (1) along its axis. The annular groove (5) has several channels evenly distributed along its axis.

3. The cap structure with carbon fiber spokes according to claim 1, characterized in that, The annular groove (5) is provided with several grooves along the axial direction of the cap (1), and any two adjacent annular grooves (5) are intersected.

4. The cap structure with carbon fiber spokes according to claim 1, characterized in that, The cap (1) includes a connecting part (101) and a joint part (102). The connecting part (101) is columnar, and the joint part (102) is located at the end of the connecting part (101) away from the spoke body (2). The joint part (102) has a convex cross-section.

5. The cap structure with carbon fiber spokes according to claim 4, characterized in that, The wall thickness of the connecting part (101) gradually decreases from one end of the joint part (102) to the other end, and the wall thickness of the end of the connecting part (101) away from the joint part (102) is greater than or equal to 1 mm.

6. The cap structure with carbon fiber spokes according to claim 1, characterized in that, The groove depth of the annular groove (5) is less than 0.2 mm.

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