Bicycle woven spoke

Abstract

The invention discloses a bicycle woven spoke which comprises a spoke body, one end of the spoke body is provided with a first spoke head connected with a hub, the other end of the spoke body is provided with a second spoke head connected with a hub, the spoke body is formed by weaving fiber threads, PBO fibers are adopted as the material of the spoke body, and the weight of the spoke is greatly reduced. The weight of the whole wheel is reduced, energy consumption needed by a rider in the riding process is reduced, the riding efficiency in long-distance riding or competition is improved, meanwhile, the strength and shearing resistance of the spokes are improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of spokes and discloses a braided spoke for a bicycle. Background Art

[0002] Road bikes are favored by many cycling enthusiasts because of their lightness and speed. In the construction of road bikes, spokes are an important part of connecting the hub and rim, which directly affects the strength and stability of the whole vehicle. Traditional road bike braided spokes are mostly made of metal materials, such as stainless steel or aluminum alloy. Although these materials have high strength, they are relatively heavy and are easily corroded after long-term use, leading to fatigue and breakage of the spokes. In addition, the manufacturing process of metal spokes is complicated and the production cost is high, which limits their widespread application in high-performance bicycles.

[0003] In order to solve the above problems, in recent years, researchers have begun to explore the use of new materials and structural designs to improve the performance of bicycle braided spokes. For example, fiber materials are gradually being used in the manufacture of bicycle braided spokes due to their excellent strength and lightweight properties. However, in the prior art, the connection method of fiber spokes often relies on glue or mechanical connectors, which may lead to unstable connections during high-intensity riding and affect the overall performance of the spokes. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a bicycle braided spoke, which has obvious advantages in strength, stability and lightness, and provides a new solution for improving the performance of road bicycles.

[0005] The technical solution provided by the present invention is as follows:

[0006] A bicycle braided spoke comprises a spoke body, one end of the spoke body has a first spoke head connected to a hub, the other end of the spoke body has a second spoke head connected to a hub, and the spoke body is braided from fiber wires;

[0007] The first spoke head and the second spoke head are formed integrally with the spoke body or formed separately.

[0008] In some embodiments, the fiber strands are PBO fibers.

[0009] In some embodiments, the first spoke head is formed separately from the spoke body, and the first spoke head has a first wrapping portion extending to one side of the spoke body, and the other side is a first connecting portion. The fiber line of the spoke body is woven and wrapped to fix the first spoke head through the first wrapping portion.

[0010] In some embodiments, the second spoke head is formed separately from the spoke body, and the second spoke head has a second wrapping portion extending to one side of the spoke body, and the other side is a second connecting portion. The fiber line of the spoke body weaves and wraps the first spoke head through the second wrapping portion to fix it.

[0011] In some embodiments, the first spoke head is an annular locking structure, and the second spoke head is an annular locking structure.

[0012] In some embodiments, the first spoke head, the second spoke head and the spoke body are integrally formed, and the first spoke head and the second spoke head are annular locking structures woven from fiber lines.

[0013] In some embodiments, the first spoke head and the second spoke head are metal connecting parts, and the surfaces of the first wrapping portion and the second wrapping portion are provided with rough surfaces.

[0014] In some embodiments, the rough surface is a protrusion, a barb structure, or an inverted trapezoidal surface.

[0015] On the other hand, a bicycle braided spoke weaving process is applied to a bicycle braided spoke in which a first spoke head and a second spoke head are integrally formed, the spoke body is formed by a PBO fiber braided wire, the single PBO fiber braided wire is braided by a plurality of fiber bundles, the single PBO fiber braided wire includes spread ends on both sides and a core end in the middle, and the weaving process includes the following steps:

[0016] S1: Several fiber bundles at both ends of a single PBO fiber braided wire are in a spread state, and the junction between the spread end and the core end is bent into an annular lock structure, and then the spread fiber bundles at the spread end are braided around the core end from the junction of the annular lock structure and the spoke body, and are braided and extended along the core end to the middle of the braided wire to form a first spoke head;

[0017] S2: Weave in the same way to form the second spoke head;

[0018] S3: The loose ends on both sides of the spoke are wrapped around the center end and woven together to meet at the middle of the spoke body, thereby completing the integral molding of the first spoke head and the second spoke head with the spoke body.

[0019] In some embodiments, the fiber strands are PBO fibers.

[0020] In summary, the beneficial effects of the present invention are as follows:

[0021] (1) The present invention uses PBO fiber as the spoke body material. The density of PBO fiber is relatively low, only 1.56 g / cm 3, compared with traditional metal materials, the weight of the spokes is greatly reduced. This not only reduces the weight of the entire wheel, but also reduces the energy consumption required by the rider during riding, and improves riding efficiency in long-distance riding or competitions. At the same time, PBO fiber has extremely high tensile strength and wear resistance, and its tensile strength can reach 5.8GPa. During long-term riding, the spokes can withstand greater impact, tension and lateral shear force, greatly extending their service life.

[0022] (2) The present invention uses a fiber thread weaving process to achieve a firm and uniform connection between the spoke head and the spoke body, thereby avoiding the stress concentration problem caused by mechanical connection in traditional metal spoke heads. The weaving method enables the spokes to evenly disperse stress when impacted by external forces, thereby improving the overall impact resistance of the spokes and ensuring stability during riding.

[0023] (3) When the spoke body of the present invention is integrally formed, the ends of the fiber lines are woven in the middle of the spoke body. The fiber lines of the woven spoke body are tightened against each other. Due to the friction between the fiber lines, the ends of the fiber lines do not need to be fixed by connecting parts and will not fall off, thereby improving the lightweight of the spokes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the braided spoke structure;

[0025] Figure 2 This is a schematic diagram of the spoke structure of Example 3;

[0026] Figure 3 This is a schematic diagram of the structure of the rough surface of the barb structure in Example 4;

[0027] Figure 4 This is a schematic diagram of the structure of the rough surface with an inverted trapezoidal structure in Example 4;

[0028] Figure 5 This is a schematic diagram of the weaving of the annular lock structure in Example 5;

[0029] Figure 6 This is a schematic diagram of the annular lock structure in Example 5.

[0030] The reference numerals are as follows:

[0031] 1. Spoke body; 2. First spoke head; 3. Second spoke head; 4. Spread end; 5. Core end; 21. First wrapping portion; 22. First connecting portion; 31. Second wrapping portion; 32. Second connecting portion. DETAILED DESCRIPTION

[0032] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0033] Example 1

[0034] Please refer to Figure 1-3 The present invention proposes a bicycle braided spoke, which is designed to provide a structure that is both lightweight and high-strength to meet the dual needs of modern bicycles, especially high-end racing bicycles, for lightness and strength. Traditional spokes are usually made of metal materials, such as stainless steel or aluminum alloy. Although they have good durability and strength, there is still room for improvement in reducing the weight of the vehicle body. The spoke body 1 of the present invention is woven from fiber wires, which greatly reduces the weight compared to traditional metal spokes. The spoke body 1 has a first spoke head 2 connected to the hub at one end and a second spoke head 3 connected to the hub at the other end.

[0035] The fiber line used in the spoke body 1 is PBO (poly(p-phenylene benzobisoxazole) fiber, which is a new type of high-performance fiber material widely used in aerospace, military protection and other fields. The strength of PBO fiber is as high as 5.8GPa, and the elastic modulus is 270GPa. Compared with other high-performance fibers such as carbon fiber or Kevlar (aramid fiber), its heat resistance is better and can withstand high temperatures up to 600°C. In addition, the density of PBO fiber is only 1.56g / cm 3 , which allows the spokes to maintain high strength while achieving extremely light weight, which is an extremely important advantage for long-term riding, especially for racing bicycles.

[0036] This fiber material can not only reduce the overall weight of the bicycle, but also improve the bicycle's fatigue resistance. Traditional metal spokes are prone to breakage due to fatigue during long-term use, while PBO fiber has higher fatigue resistance and shear resistance and longer service life, which can avoid the inconvenience of frequent replacement of spokes.

[0037] Example 2

[0038] This embodiment further describes the structural details of the bicycle braided spokes. The spoke body 1 is provided with a first spoke head 2 and a second spoke head 3 at both ends. Different from the simple mechanical connection of the traditional bicycle spokes, the present invention tightly combines the spoke body and the spoke head by weaving. Specifically, the first spoke head 2 has a first wrapping portion 21 extending to one side of the spoke body 1. This structure can provide sufficient contact area so that the fiber line of the spoke body can tightly wrap the first spoke head 2 by weaving, and the second spoke head 3 is the same. Thereby avoiding the problem of falling off or loosening caused by loose connection in the traditional connection method.

[0039] The weaving method not only enhances the connection strength, but also effectively avoids the local stress concentration phenomenon that may occur in mechanical connections. In traditional mechanical connections, the connection between the spoke head and the spoke body usually relies on threads, rivets or glue. Although these connection methods can provide sufficient fixing force to a certain extent, they often form stress concentration points at the connection parts, causing these parts to be more prone to fatigue cracks during long-term use. The weaving method can evenly disperse the stress, making the force on the entire spoke more uniform, thereby extending the service life of the spoke. At the same time, after the spokes are installed, the braided spokes will be tightened under the action of the spoke tension, further wrapping the first wrapping part 21 or the second wrapping part 31, thereby improving the fixing strength.

[0040] The structure of the second spoke head 3 is similar to that of the first spoke head, and it also has a second wrapping portion 31 extending toward one side of the spoke body 1. The fiber line also fixes the second spoke head 3 by weaving and wrapping. Due to the flexibility of this weaving method, the spoke can be adaptively adjusted according to the running state of the bicycle in actual use, and can maintain sufficient rigidity to support the operation of the wheel, and has a certain flexibility to buffer the vibration during riding, thereby improving riding comfort.

[0041] Example 3

[0042] The design of the spoke head can be optimized accordingly for different types of bicycles. For example, in road bicycles and racing bicycles, the riding speed is fast, and higher requirements are placed on the tensile strength and connection firmness of the spokes. For this reason, the spoke head in the present invention can adopt an annular lock structure, that is, the first connecting portion 22 and the second connecting portion 32 are designed as a closed annular structure. This structure can ensure that the connection between the spoke head and the hub and the wheel hub is more stable, avoiding dangerous situations caused by loose or broken spokes during high-speed riding. Of course, the structure of the first connecting portion 22 and the second connecting portion 32 can also be a commonly used connection structure in existing spokes.

[0043] This annular lock structure is firmly fixed to the spoke body by weaving fiber lines, making the connection between the spoke and the wheel tighter. In actual production, this annular lock structure can be formed in one step by a mold, and can be made of either metal material or the same PBO fiber material as the spoke body. The high strength and light weight of PBO fiber make this annular lock structure not only provide sufficient strength, but also further reduce the weight of the wheel.

[0044] Example 4

[0045] This embodiment describes in detail the design details when the first spoke head 2 and the second spoke head 3 are made of metal. In some cases, metal materials are still the first choice for some bicycle enthusiasts and professional riders due to their high rigidity and durability. Therefore, the present invention provides a design using metal spoke heads, which can further enhance the connection strength and durability of braided spokes while maintaining the lightness of the braided spokes. The metal spoke heads can be traditional threaded rods or T-shaped inlaid structures.

[0046] In order to ensure that the fiber line and the metal spoke head are more firmly combined, the present invention provides a rough surface on the surface of the metal spoke head. These rough surfaces can be convex points, barbs or other microstructures with friction. The role of the rough surface is to increase the friction between the fiber line and the metal surface, and prevent the fiber line from sliding or loosening due to force during long-term use.

[0047] Specifically, the convex point structure can be manufactured by machining or mold forming processes and distributed on the surface of the wrapped part of the metal spoke head. These convex points can be in different shapes, such as circular, oval or strip-shaped, to increase friction in different directions. The barb structure can further enhance the grip of the fiber line by creating a plurality of tiny hook-shaped protrusions on the metal surface. The inverted trapezoidal structure has a larger diameter on the side close to the spoke body 1. When the spoke is tensioned, the side with a larger diameter can act as a fiber for the wrapped braided spoke, thereby improving the stability of the connection. This structure is particularly suitable for bicycles that frequently perform intense exercises, such as climbing or rocking.

[0048] Metal spoke heads not only enhance the connection strength, but also provide flexibility in material selection. Common metal materials include aluminum alloy, stainless steel or titanium alloy, which have different strength, rigidity and corrosion resistance, and can be selected according to the actual use environment of the bicycle. Aluminum alloy is light and has good corrosion resistance, suitable for road bikes and urban riding; while titanium alloy, although more expensive, has extremely high strength and durability, and is suitable for use in high-end racing bicycles.

[0049] In terms of weaving technology, the braided spokes of the present application can be woven manually or by a computer-controlled multi-axis braiding machine. The braiding machine controls the arrangement and tightness of the fiber lines according to set parameters, thereby achieving high-precision and high-consistency spoke production.

[0050] Example 5

[0051] This embodiment provides an implementation method in which the first spoke head 2 and the second spoke head 3 are integrally formed with the spoke body 1, specifically:

[0052] Please refer to Figure 5-6The braided spokes shown, the spoke body 1 of this embodiment is formed by a PBO fiber braided wire, and the single PBO fiber braided wire is woven from a number of fiber bundles. During weaving, the fiber bundles at both ends of the single PBO fiber braided wire are in a scattered state. At this time, the single PBO fiber braided wire is divided into scattered ends 4 on both sides and a core end 5 in the middle. The annular lock structure on both sides is woven in the same way. One side is used as an example in the figure: the junction of the scattered end 4 and the core end 5 is bent into an annular lock structure, and then the scattered fiber bundles of the scattered end 4 are woven around the core end 5 from the junction of the annular lock structure and the spoke body 1, and are woven and extended along the core end 5 to the middle of the braided wire. The scattered ends 4 on both sides of the spokes are wrapped around the core end 5 and woven, and then meet in the middle of the spoke body 1, thereby completing the integral molding of the first spoke head 2 and the second spoke head 3 with the spoke body 1.

[0053] In this embodiment, a single 0.9 mm PBO fiber braided wire is used for weaving. The first spoke head 2 and the second spoke head 3 are annular lock buckles formed by a single PBO fiber braided wire. The fiber wire diameter at the first spoke head 2 and the second spoke head 3 is 0.9 mm. Weaving starts from the end of the lock buckle. The cross-sectional diameter of the woven spoke body 1 is 1.8 mm. The strength of the woven PBO braided spokes is greater than that of a single PBO fiber wire.

[0054] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments.

[0055] It should also be noted that this document may provide demonstrations of parameters containing specific values, but these parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint. Directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", etc., are only referenced to the directions of the drawings and are not intended to limit the scope of protection of this application.

[0056] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A bicycle braided spoke, characterized in that: The spoke body (1) comprises a spoke body (1), one end of the spoke body (1) comprises a first spoke head (2) connected to a hub, and the other end of the spoke body (1) comprises a second spoke head (3) connected to a hub, and the spoke body (1) is woven from fiber wires; The first spoke head (2) and the second spoke head (3) are integrally formed with the spoke body (1) or are separately formed.

2. The bicycle braided spoke according to claim 1, characterized in that: The fiber line is PBO fiber.

3. The bicycle braided spoke according to claim 1, characterized in that: The first spoke head (2) is formed separately from the spoke body (1); the first spoke head (2) has a first wrapping portion (21) extending toward one side of the spoke body (1), and a first connecting portion (22) on the other side; the fiber line of the spoke body (1) is woven and wrapped around the first spoke head (2) through the first wrapping portion (21) to fix it.

4. The bicycle braided spoke according to claim 3, characterized in that: The second spoke head (3) is formed separately from the spoke body (1); the second spoke head (3) has a second wrapping portion (31) extending toward one side of the spoke body (1), and a second connecting portion (32) on the other side; the fiber line of the spoke body (1) is woven and wrapped around the first spoke head (2) through the second wrapping portion (31) to fix it.

5. The bicycle braided spoke according to claim 1, characterized in that: The first spoke head (2) is an annular locking structure, and the second spoke head (3) is an annular locking structure.

6. The bicycle braided spoke according to claim 1, characterized in that: The first spoke head (2), the second spoke head (3) and the spoke body (1) are integrally formed; the first spoke head (2) and the second spoke head (3) are annular locking structures woven from fiber lines.

7. The bicycle braided spoke according to claim 4, characterized in that: The first spoke head (2) and the second spoke head (3) are metal connecting parts, and the surfaces of the first wrapping portion (21) and the second wrapping portion (31) are provided with rough surfaces.

8. The bicycle braided spoke according to claim 7, characterized in that: The rough surface is a convex point, a barb structure or an inverted trapezoidal surface.

9. A bicycle braided spoke weaving process, applied to the bicycle braided spoke as claimed in claim 6, characterized in that: The spoke body 1 is formed by a fiber braided wire, and the single fiber braided wire is braided by a plurality of fiber bundles. The single fiber braided wire includes a spread end 4 on both sides and a core end 5 in the middle. The braiding process includes the following steps: S1: A plurality of fiber bundles at both ends of a single fiber braided wire are in a spread state, and the junction of the spread end 4 and the core end 5 is bent into an annular lock structure, and then the spread fiber bundles at the spread end 4 are braided around the core end 5 from the junction of the annular lock structure and the spoke body 1, and are braided and extended along the core end 5 toward the middle of the braided wire to form a first spoke head 2; S2: weaving in the same way to form the second spoke head 3; S3: The scattered ends 4 on both sides of the spokes are wrapped around the central end 5 and woven together at the middle of the spoke body 1, thereby completing the integral molding of the first spoke head 2 and the second spoke head 3 with the spoke body 1.

10. A bicycle braided spoke weaving process according to claim 9, characterized in that: The fiber is PBO fiber.

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