Torsional hub shell

Abstract

The invention discloses a torsion hub shell which comprises a hollow hub shell body, and two flanges used for being connected with spokes are arranged on the surface of the hub shell body. The hub shell is composed of a first shell, a second shell and a third shell, the second shell and the third shell are arranged on the two sides of the first shell, the first shell is provided with a twisted structure formed by twisting in the axial direction, and the inner side of the second shell is provided with a gear ring used for being coupled with a tower footing. The twisted structure comprises a plurality of supporting faces and reinforcing ribs among the supporting faces, and the reinforcing ribs extend in the riding direction and are used for enhancing the strength of the shell. The first flange and the second flange are arranged on the outer surfaces of the second shell and the first shell correspondingly and used for achieving spoke connection. The hub shell is novel in structure, has excellent strength and stability, and is particularly suitable for being applied to a high-performance bicycle wheel set.

Description

Technical Field

[0001] The present invention belongs to the technical field of flower drums and discloses a torsion flower drum housing. Background Art

[0002] With the popularization of cycling and the development of the trend of overall vehicle lightweight, the flower drum, as an important core component connecting the frame and the wheel set, the optimization of its structural performance and manufacturing process has become a hot topic in current technology research and development. Traditional flower drum housings are usually made of aluminum alloy materials and are formed by mechanical processing methods such as CNC turning and milling. Although they can meet the basic strength requirements, they have deficiencies such as large weight, long processing cycle, and limited design shapes. In the field of high-end sports bicycles, especially in road racing or mountain off-road applications, cyclists' requirements for the overall vehicle weight, structural strength, impact resistance, and fatigue resistance are increasing day by day, and the manufacturing methods and structural designs of traditional flower drums are difficult to meet the professional needs of this type of users.

[0003] In addition, most of the existing flower drum housings have a straight cylinder or symmetrical structure design, lacking the ability to guide and adjust the spoke tension distribution. In an asymmetrical wheel set structure (such as the rear wheel with a large tension difference between the freehub side and the non-freehub side), it is very difficult for the traditional flower drum housing to achieve tension balance adjustment, thus affecting the overall stability and service life of the wheel set. At the same time, it is difficult for the traditional flower drum structure to balance lightweight and strength, resulting in sacrificing some reliability while pursuing weight reduction.

[0004] Therefore, there is an urgent need to provide a flower drum housing with novel structure, convenient manufacturing, and excellent performance to meet the multiple requirements of the new generation of high-performance bicycles for lightweight, personalization, and functionality of the flower drum. Summary of the Invention

[0005] To solve the above problems, the present invention provides a torsion flower drum housing, which adopts an axial torsion structure. On the basis of ensuring the structural strength, it can optimize the force distribution of the spokes and improve the overall torsional resistance and riding stability of the wheel set.

[0006] The technical solution provided by the present invention is as follows:

[0007] A torsion flower drum housing includes a flower drum housing with a hollow interior. Two flanges extending outward are provided on the surface of the flower drum housing, and the flanges are used to connect the spokes;

[0008] The flower drum housing includes a first housing, and second and third housings provided on both sides of the first housing. The first housing is axially twisted to form a twisted pattern.

[0009] In some embodiments, a gear ring coupled to the freehub is provided inside the second housing.

[0010] In some embodiments, the gear ring is integrally formed with the second housing.

[0011] In some embodiments, the twisted flower includes a plurality of support surfaces and a plurality of reinforcing ribs located between the support surfaces and protruding from the support surfaces.

[0012] In some embodiments, the reinforcing ribs extend from the second housing to the third housing and along the riding direction.

[0013] In some embodiments, the number of the reinforcing ribs is 5 - 8.

[0014] In some embodiments, the flange includes a first flange provided on the outer surface of the second housing.

[0015] In some embodiments, the flange includes a second flange provided on the outer surface of the first housing on the side away from the second housing.

[0016] In some embodiments, the diameter of the first flange is larger than the diameter of the second flange.

[0017] In summary, the beneficial effects of the present invention are as follows:

[0018] (1) The present invention sets the hub shell into a torsional structure and distributes it along the riding direction. That is, when the bicycle moves forward, the reinforcing ribs are arranged along the forward direction, which plays a role in dispersing and guiding the axial stress. It effectively enhances the structural stability of the hub shell under complex loads such as torsion, side pressure, and impact, and is particularly suitable for high-performance bicycles such as mountain bikes and road bikes that require high-strength support.

[0019] (2) The present invention sets a plurality of reinforcing ribs and support surfaces in the torsional area, effectively dispersing the stress concentration area in the torsional section and enhancing the overall rigidity and anti-deformation ability of the structure, which is suitable for high-intensity riding conditions.

[0020] (3) The present invention integrates a gear ring coupled to the freehub in the inner side of the second housing of the hub shell. This gear ring can be directly engaged with the freehub structure, improving the structural compactness and simplifying the assembly process, and reducing the number of parts and the accumulation of tolerances. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic three-dimensional structure diagram of the present invention.

[0022] Figure 2 is a schematic side view structure diagram of the present invention.

[0023] The reference numerals are as follows:

[0024] 1, hub shell; 11, first housing; 12, second housing; 13, third housing; 21, first flange; 22, second flange; 111, twisted flower; 121, gear ring; 1111, support surface; 1112, reinforcing rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] 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 to the protection scope of the present invention.

[0026] The present invention provides a torsion hub shell, which is mainly applied to the rear hub structure of a bicycle wheel set. The main innovation of this hub shell lies in its adoption of an axial torsion structure, which can optimize the force distribution of the spokes on the basis of ensuring the structural strength, and improve the overall torsional resistance and riding stability of the wheel set.

[0027] As Figure 1-2 shown, the torsion hub shell includes a hub shell 1 with an overall hollow cylindrical structure. Flanges 2 for connecting with bicycle spokes are provided at both ends of the hub shell 1. The hub shell 1 is composed of three parts, namely a first shell 11, a second shell 12 and a third shell 13. The first shell 11 is located in the middle, and the second shell 12 and the third shell 13 are respectively arranged on both sides of the first shell 11.

[0028] In this embodiment, the first shell 11 is the core structure of the hub shell, and its characteristic is that it forms a torsion structure along the axial direction, namely "twisted pattern 111". This twisted pattern structure is not a simple straight cylinder, but by designing several inclined planes, the entire first shell generates a spiral torsion in the axial direction, thereby enhancing its overall torsional rigidity.

[0029] Specifically, the twisted pattern 111 is composed of several support surfaces 1111, and these support surfaces are planar structures that are slightly inclined along the axis of the hub and arranged symmetrically around the center axis. Several reinforcing ribs 1112 are provided between each support surface 1111. These reinforcing ribs 1112 extend from the second shell 12 towards the third shell 13 and are distributed along the riding direction, that is, when the bicycle is moving forward, the reinforcing ribs are arranged along the forward direction, playing a role in dispersing and guiding the axial stress.

[0030] The reinforcing ribs 1112 are convex structures protruding from the outer surface of the support surface 1111, and their cross-sections can be semicircular, trapezoidal or other polygons. The specific shape can be optimized according to the mechanical analysis in actual applications. This structure effectively enhances the structural stability of the hub shell under complex loads such as torsion, side pressure and impact, and is particularly suitable for high-performance bicycles such as mountain bikes and road bikes that require high-strength support.

[0031] In this application, the number of the reinforcing ribs 1112 is 5 - 8. In this embodiment, preferably 6 reinforcing ribs are adopted. The reinforcing ribs are arc-shaped and evenly distributed along the circumferential direction of the hub shell between adjacent support surfaces, so as to effectively enhance the axial, radial and torsional stresses borne by the hub shell during riding without increasing the overall weight, and improve the strength and anti-fatigue performance of the overall structure. The specific number of the reinforcing ribs can also be adjusted according to the actual load requirements to adapt to the mechanical property requirements of different wheel set structures or riding scenarios.

[0032] In a preferred implementation manner, the second shell 12 is arranged on the carrier side of the first shell 11, that is, on the side close to the freewheel installation end. A first flange 21 is arranged on its outer surface for connecting the spokes. A gear ring 121 for connecting with the carrier assembly is arranged in the internal structure. Preferably, the gear ring 121 and the second shell 12 are integrally formed, that is, the gear ring 121 and the shell structure are an integrated structure, avoiding problems such as loosening and tooth misalignment that may be caused by the traditional processing methods of heating and press-fitting or gluing a metal gear ring in a hub, thereby improving the stability and processing efficiency of the product, and also helping to further reduce the weight of the bicycle.

[0033] The tooth profile of the gear ring 121 can be selected from common rectangular teeth, triangular teeth or involute tooth profiles according to the meshing mode with the carrier. The material can be an enhanced polymer composite material or high-strength aluminum alloy. The clearance between its inner hole structure and the carrier ratchet is controlled within 0.05 mm to ensure efficient energy transfer and stable meshing during the transmission process.

[0034] Further, the third shell 13 is located on the side of the first shell 11 away from the carrier and is connected to the spokes on the other side of the wheel. To achieve structural symmetry and tension balance, a second flange 22 is arranged on the outer surface of the third shell 13. Compared with the first flange 21, the diameter of the second flange 22 is slightly smaller, forming an asymmetric flange layout structure. This design is especially applicable to the bicycle wheel set under the carrier offset structure, which can optimize the tension distribution of the spokes and prevent the rim from shifting.

[0035] In actual use, the diameter of the first flange 21 is preferably 60 - 70 mm, and the diameter of the second flange 22 is 50 - 60 mm. The difference between the two is about 10 mm. The tension balance of the wheel set can be further improved by adjusting the arrangement mode of the spokes (such as adopting a 2-cross or 3-cross lacing method).

[0036] The flange 2 is a key part for connecting the spoke to the hub shell. In the present invention, the flange is divided into a first flange 21 and a second flange 22, which are respectively arranged on the outer surfaces of the second shell 12 and the third shell 13. A plurality of through holes evenly distributed are provided on the outer side of the flange 2 for passing through the spokes. The through holes can be round holes or oval holes, and corresponding chamfering treatments are designed according to the shape of the spoke head to avoid stress concentration. There is a certain included angle between the arrangement angle of the through holes and the axis, generally 3°-6°, which is convenient for the spokes to be connected to the rim at a reasonable angle.

[0037] After the torsion hub shell of the present invention is installed on the rear wheel set of the whole vehicle, the torsion structure can effectively reduce the torsion of the shell caused by pedaling, effectively improve the transmission efficiency. The application of the polymer material reduces the overall weight of the hub and improves the riding lightness. At the same time, the integrated design of the gear ring reduces the assembly error and improves the overall reliability.

[0038] In summary, the torsion hub shell of the present invention has significant advantages in terms of structural design, material application and performance, and is suitable for popularization and application in various mid - to - high - end bicycle products.

[0039] It should be noted that, in the drawings or the main text of the specification, the implementation manners that are not shown or described are all forms known to those of ordinary skill in the art, and no detailed description is given. In addition, the above definitions of each element and method are not limited to the specific structures, shapes or manners mentioned in the embodiments.

[0040] It also should be noted that this text can provide demonstrations of parameters including specific values, but these parameters do not necessarily exactly equal the corresponding values, but can approximate the corresponding values within an acceptable error tolerance or design constraints. The directional terms mentioned in the embodiments, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", etc., are only references to the directions in the drawings and are not used to limit the protection scope of this application.

[0041] 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 forms disclosed herein. It should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A torsion hub shell, characterized in that: It includes a hub shell (1) with a hollow interior. Two outwardly extending flanges (2) are provided on the surface of the hub shell (1), and the flanges (2) are used to connect the spokes. The hub shell (1) includes a first shell body (11), and second shell bodies (12) and third shell bodies (13) provided on both sides of the first shell body (11). The first shell body (11) is axially twisted to form a twisted pattern (111).

2. The torsional hub shell according to claim 1, characterized in that, A gear ring (121) coupled to a freewheel is provided inside the second shell body (12).

3. The torsion hub shell according to claim 2, wherein The gear ring (121) is integrally formed with the second shell body (12).

4. The torsional hub shell according to claim 1, characterized in that, The twisted pattern (111) includes a plurality of support surfaces (1111), and a plurality of reinforcing ribs (1112) located between the support surfaces (1111) and protruding from the support surfaces (1111).

5. The torsional hub shell according to claim 4, characterized in that, The reinforcing ribs (1112) extend from the second shell body (12) to the third shell body (13) and along the riding direction.

6. The torsion hub shell according to claim 5, characterized in that, The number of the reinforcing ribs (1112) is 5 - 8.

7. The torsion hub shell according to claim 3, wherein, The flange (2) includes a first flange (21) provided on the outer surface of the second shell body (12).

8. The torsion hub shell according to claim 7, characterized in that The flange (2) includes a second flange (22) provided on the outer surface of the first shell body (11) on the side away from the second shell body (12).

9. The torsional hub shell according to claim 8, characterized in that, The diameter of the first flange (21) is larger than the diameter of the second flange (22).

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