Long life low wind resistance spoke

Abstract

The utility model discloses a long -life low wind resistance spoke relates to spoke technical field, including the pole body, and the pole body is stacked by a plurality of top and bottom planing spindle body structure, the spindle body structure has a plurality of protruding petal, and the symmetry center line of petal in the front direction is identical with the rotation of wheel forward direction, and the arc surface of petal on both sides in the front direction all extend streamline type to rear, and the same side petal between the spindle body structure of adjacent upper and lower is equipped with the connecting plate for transmitting side bending stress, and one end of pole body is equipped with the threaded section, and the other end is equipped with the fender cap. The utility model provides a long -life low wind resistance spoke, and the wind area is small, has streamline shape structure, and the wind resistance is small, and the spindle body structure set up on the pole body has the spherical structure, can effectively disperse stress, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of spoke technology, specifically to a long-life, low-drag spoke. Background Technology

[0002] In recent years, cycling has become increasingly popular, prompting manufacturers to invest heavily in bicycle research and development. Spokes, the structure connecting the rim and hub, ensure effective synchronization between them. Therefore, balancing the lateral stiffness, rotational drive force, wind resistance, and weight of the spokes is crucial. Currently, spokes are generally divided into round spokes and oblong spokes. While round spokes offer higher lateral stiffness and lighter weight, their round shape results in lower rotational drive force and higher wind resistance. Similarly, because the oblong direction of oblong spokes is parallel to the rotational direction of the rim, they offer better rotational drive force and lower wind resistance compared to round spokes. However, since the oblong direction of oblong spokes extends laterally across the sides of the bicycle, their lateral stiffness is relatively insufficient, and they are larger, heavier, and have a shorter lifespan, presenting shortcomings that urgently need improvement. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a long-life, low-wind-resistance spoke. Technical solution

[0004] A long-life, low-drag spoke includes a rod body, which is composed of multiple spindle structures with flattened tops and bottoms stacked together. Each spindle structure has multiple protruding petals. The symmetrical center line of the front petal is aligned with the direction of rotation of the wheel. The arc-shaped surfaces of the petals on both sides of the front extend backward in a streamlined manner. A connecting plate for transmitting lateral bending stress is provided between the petals on the same side of adjacent upper and lower spindle structures. One end of the rod body has a threaded section, and the other end has a stop cap.

[0005] Furthermore, the spindle structure on the rod has 3-6 petals, preferably 3.

[0006] Furthermore, both ends of the rod are columnar structures, with a threaded section at the end of one columnar structure and a stop cap at the end of the other columnar structure. The diameter of the columnar structure is greater than or equal to the maximum diameter of the spindle structure.

[0007] Furthermore, the columnar structure with threaded sections is straight.

[0008] Furthermore, the columnar structure connecting the cap is either straight or bent in an L-shape.

[0009] Furthermore, the top and bottom spindle structures are cut off from the very middle, and the cut surfaces are connected to the columnar structures.

[0010] Beneficial effects:

[0011] Traditional pole structures are cylindrical, or the middle part of a cylinder is flattened into a roughly rectangular structure. For the same weight and radial dimensions, the cylindrical shape has a large windward area and a small streamline amplitude, resulting in high wind resistance. Flattening the cylinder results in a small windward area, but the narrow width and rectangular shape lead to insufficient lateral rigidity.

[0012] This invention provides a long-life, low-drag spoke design. The spoke's rod structure is specially designed, with multiple spindle-shaped structures stacked together. Each spindle structure has a forward-facing petal as a wind-breaking surface, while the side petals have a streamlined structure with large amplitudes to reduce wind resistance. For the same diameter, the windward area is also smaller than that of a cylinder. Furthermore, a connecting plate is incorporated to transfer stress during lateral bending. The spindle structure has a near-spherical characteristic, effectively dispersing stress and preventing breakage at the thin joints between adjacent spindle structures, resulting in a long service life. For the same diameter and material, this invention's structure is also lighter than a cylindrical structure, reducing overall vehicle weight, lowering friction, and enhancing vehicle handling performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the spoke structure of this utility model; Figure 2 This is a schematic diagram of the spindle body structure of this utility model; Figure 3 This is a schematic diagram of the AA cross section of the spindle structure of this utility model when the number of petals is 3; Figure 4 This is a schematic diagram of the AA cross section of the spindle structure of this utility model when the number of petals is 4; Figure 5 This is a schematic diagram of the AA cross-section of the spindle structure of this utility model when the number of petals is 7. Figure 6 This is a schematic diagram of the AA cross section of the spindle structure of this utility model when the number of petals is 8.

[0014] In the diagram, 1 is the rod; 2 is the spindle structure; 3 is the petals; 4 is the connecting plate; 5 is the threaded section; 6 is the stop cap; and 7 is the columnar structure. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings.

[0016] As attached Figure 1 To be continued Figure 6 As shown. Specific implementation examples:

[0018] like Figure 1-2As shown, a long-life, low-drag spoke includes a rod 1, which is composed of multiple spindle structures 2 with flattened tops and bottoms stacked together. Each spindle structure 2 has multiple protruding petals 3, which resemble the shape of a starfruit, except for the number of petals. The symmetrical center line of the petal 3 at the front is aligned with the direction of rotation of the wheel. The arc surfaces of the petals 3 on both sides at the front extend backward in a streamlined manner. A connecting plate 4 for transmitting lateral bending stress is provided between the petals 3 on the same side of adjacent spindle structures 2. One end of the rod 1 is provided with a threaded section 5, and the other end is provided with a cap 6.

[0019] Figure 3-6 For the same maximum radial dimension and petal shape, the spindle structure with 3, 4, 7, and 8 petals respectively shows the maximum transverse cross-sectional view. Figure 2 The cross-sectional view of the AA tangent cut shows that when the number of petals is 3 and 4, the curved surfaces of the petals on both sides extend backward in a streamlined manner, which helps reduce wind resistance. When the number of petals is 7 and 8, the two lower petals begin to show curved surfaces protruding forward, and the wind resistance increases significantly. Therefore, the number of petals 3 in the spindle structure 2 on the rod 1 is preferably 3-6. More preferably, it is 3, which results in fewer petals, lower manufacturing costs, and a larger backward curvature. The above preferred number is limited to the case of this embodiment and may vary when the petal shape changes.

[0020] Both ends of the rod 1 are columnar structures 7. The threaded section 5 is located at the end of one of the columnar structures 7, and the stop cap 6 is located at the end of the other columnar structure 7. The diameter of the columnar structure 7 is greater than or equal to the maximum diameter of the spindle structure 2. If it is too thin, it will result in insufficient strength and easy breakage.

[0021] Preferably, the columnar structure 7 with threaded section 5 is straight; the columnar structure 7 connecting the stop cap 6 is straight or bent L-shaped, the shape of which is determined by its connection method with the bicycle hub.

[0022] Preferably, the top and bottom spindle structures 2 are cut off from the middle, and the cut surface is connected to the columnar structure 7. If the diameter of the columnar structure 7 is larger than the maximum cross-sectional diameter of the spindle 2, the cut surface can be connected to the columnar structure 7 through an arc transition.

[0023] Traditional rod structure 1 is cylindrical, or the middle part of the cylinder is flattened into a roughly rectangular structure. Under the same weight and radial dimensions, the cylindrical shape has a large windward area and a small streamline amplitude, resulting in high wind resistance. After flattening, the windward area is small, but the narrow width and rectangular shape lead to insufficient lateral rigidity.

[0024] This invention provides a long-life, low-drag spoke design. The spoke rod 1 is specially designed as a stack of multiple spindle structures 2. Each spindle structure 2 has a front-facing petal 3, the arc of which extends rearward to act as a wind-breaking surface. The two side petals 3 have a streamlined structure with a large amplitude to reduce wind resistance. For the same diameter, the frontal area is smaller than that of a cylinder (L < diameter d). Furthermore, a connecting plate 4 is provided to transfer stress during lateral bending. The spindle structures 2 have a near-spherical shape, effectively dispersing stress and preventing breakage at the thin joints of adjacent spindle structures 2. Additionally, the spindle structures 2 can effectively disperse axial stress, whether tensile or compressive. Moreover, for the same diameter and material, the structure of this invention has multiple hollowed-out areas, making it lighter than a cylindrical structure, reducing overall vehicle weight, lowering friction, and enhancing vehicle performance.

[0025] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection of the claims of this application.

Claims

1. A long-life, low-drag spoke, characterized in that, The rod includes a shaft composed of multiple stacked spindle structures with flattened tops and bottoms. Each spindle structure has multiple protruding petals. The symmetrical center line of the front petal is aligned with the direction of rotation of the wheel. The arc-shaped surfaces of the petals on both sides of the front extend backward in a streamlined manner. A connecting plate for transmitting lateral bending stress is provided between the petals on the same side of adjacent upper and lower spindle structures. One end of the shaft has a threaded section, and the other end has a stop cap.

2. The long-life, low-drag spoke according to claim 1, characterized in that, The spindle structure on the rod has 3-6 petals.

3. The long-life, low-drag spoke according to claim 2, characterized in that, The spindle structure on the rod has three petals.

4. The long-life, low-drag spoke according to claim 1, characterized in that, Both ends of the rod are columnar structures, with a threaded section at the end of one columnar structure and a stop cap at the end of the other columnar structure. The diameter of the columnar structure is greater than or equal to the maximum diameter of the spindle structure.

5. A long-life, low-drag spoke according to claim 4, characterized in that, The columnar structure with threaded sections is a straight type.

6. A long-life, low-drag spoke according to claim 4, characterized in that, The columnar structure connecting the cap is either straight or bent in an L-shape.

7. A long-life, low-drag spoke according to any one of claims 4-6, characterized in that, The top and bottom spindle structures are cut off from the middle, and the cut surfaces are connected to the columnar structures.

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