Carbon fiber hollow closed wheel with middle reinforcing rib

Abstract

The utility model discloses a kind of carbon fiber hollow closed wheels with middle reinforcing rib, it is related to wheel field, including mounting seat, wheel frame, side plate and the reinforcing rib of outside wrapping carbon yarn.The utility model is enclosed by mounting seat, wheel frame and two side plates to form integrally formed carbon fiber hollow closed wheel, strengthen the strength of vehicle wheel while lightening weight, ensure that closed wheel does not occur deformation when bearing alternate load;The carbon yarn wrapped outside reinforcing rib can increase the strength of reinforcing rib, avoid the deformation of reinforcing rib when being impacted by load during bicycle travel, so that the deformation of carbon fiber hollow closed wheel is caused, while significantly improve the tensile strength and load capacity of carbon fiber hollow closed wheel lateral stress area;The side plate provided not only has the effect of closed rectifier, but also has the effect of connecting mounting seat and wheel frame, avoid the energy loss caused by spoke deformation, reduce even avoid the deformation of carbon fiber hollow closed wheel after being impacted by load.

Description

Technical Field

[0001] This utility model relates to the field of wheel technology, specifically to a carbon fiber hollow enclosed wheel with a central reinforcing rib. Background Technology

[0002] Bicycle closed wheels (also known as disc wheels or pancake wheels) are a special type of wheel set without spokes, in the shape of a sealed disc. They are usually made of carbon fiber and filled with foam material, and are designed specifically to improve aerodynamic performance. Closed wheels can significantly increase speed on flat roads or in windless conditions by reducing drag and turbulence generated by the spokes.

[0003] For example, patent CN215513072U, published on January 14, 2022, entitled "A Carbon Fiber Enclosed Wheel," includes a rim, hub, drive-side fairing, non-drive-side fairing, and several supporting spokes. The drive-side and non-drive-side fairings each have a first mounting through hole and a second mounting through hole. The drive-side and non-drive-side fairings are mounted on the drive and non-drive sides of the hub, respectively. The non-drive-side fairing has a centrally raised arc-shaped curved surface structure, and a support kit is provided on the non-drive side of the hub. The support kit is fitted onto the non-drive side of the hub, and its outer end is connected to the non-drive-side fairing. This patent, by adding a support kit to the non-drive side of the hub, allows the non-drive-side fairing to be unrestricted by the hub structure. Compared to ordinary non-drive-side fairings, the degree of arc curvature can be greater within a certain range, thus improving the overall rigidity of the enclosed wheel and enhancing its market competitiveness.

[0004] The shortcomings of the existing technology are that it uses spokes to support the rim and hub, and then wraps the sides of the rim and hub with a cover (drive side fairing and non-drive side fairing) to seal the rim, hub and spokes. However, the spokes still play a supporting role, which can easily lead to instability of the wheel's center of gravity. In addition, the impact resistance of spoked wheels is limited, which can easily lead to stress concentration and fatigue fracture. At the same time, the cover only serves a sealing function. Utility Model Content

[0005] The purpose of this invention is to provide a carbon fiber hollow enclosed wheel with a central reinforcing rib to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A hollow, enclosed carbon fiber wheel with a central reinforcing rib includes a mounting base, a wheel frame coaxially disposed on the outer side of the mounting base, and two side plates disposed between the wheel frame and the mounting base. The mounting base, the wheel frame, and the two side plates form a hollow, enclosed wheel. The wheel also includes: The reinforcing ribs are multiple in number and evenly arranged along the circumference of the mounting base. The reinforcing ribs are disposed between the two side plates and are used to connect and fix the two side plates. The outer side of the reinforcing ribs is wrapped with carbon yarn.

[0007] As described above, the mounting base has a circular through hole in the middle, which is used to install the hub and bearing.

[0008] As described above, the outer side of the wheel rim is provided with a hook edge, and the middle of the wheel rim is provided with a valve hole.

[0009] As described above, the two ends of the side plate are respectively connected to the mounting base and the wheel frame.

[0010] As described above, the reinforcing rib has symmetrically arranged arc-shaped portions at the center of its side, and the side plate is attached to the side of the reinforcing rib.

[0011] The reinforcing ribs mentioned above are made of PMI material.

[0012] The beneficial effects of this utility model in the above technical solution are as follows: 1. This utility model is a carbon fiber hollow enclosed wheel formed by the mounting base, wheel frame and two side plates in one piece, so as to enhance the strength of the wheel and reduce the weight. Multiple reinforcing ribs are set between the two side plates to increase the strength of the enclosed wheel and ensure that the enclosed wheel will not deform when subjected to alternating loads. This utility model increases the strength of the closed wheel by providing multiple reinforcing ribs, and the carbon yarn wrapped around the outside of the reinforcing ribs can increase the strength of the reinforcing ribs, preventing the reinforcing ribs from deforming when subjected to impact loads during bicycle movement, thus preventing the carbon fiber hollow closed wheel from deforming. At the same time, it significantly improves the tensile strength and load-bearing capacity of the lateral stress area of ​​the carbon fiber hollow closed wheel. The side plate of this utility model not only has the function of sealing and rectifying, but also connects the mounting base and the wheel frame, avoiding energy loss caused by spoke deformation and reducing or even avoiding deformation of the carbon fiber hollow sealed wheel after being subjected to impact load. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A three-dimensional structural diagram of the carbon fiber hollow closed wheel with intermediate reinforcing rib provided in this utility model embodiment; Figure 2A schematic diagram of the planar structure of a carbon fiber hollow closed wheel with intermediate reinforcing ribs provided in another embodiment of this utility model; Figure 3 Provided for another embodiment of this utility model Figure 2 Sectional view at point AA; Figure 4 Provided for another embodiment of this utility model Figure 3 A magnified view of a portion of point M; Figure 5 This is a schematic diagram of the planar structure between the reinforcing rib and the arc portion provided in another embodiment of the present invention; Figure 6 A cross-sectional view between the reinforcing rib and the carbon yarn provided in another embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Mounting base; 10. Circular through hole; 2. Wheel frame; 20. Hook edge; 21. Valve hole; 3. Side plate; 4. Reinforcing rib; 40. Carbon fiber yarn; 41. Arc section. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "side", "inner", "outer", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figures 1-6 As shown in the figure, the present invention provides a hollow enclosed carbon fiber wheel with a central reinforcing rib, comprising a mounting base 1, a wheel frame 2 coaxially disposed on the outer side of the mounting base 1, and two side plates 3 disposed between the wheel frame 2 and the mounting base 1. The mounting base 1, the wheel frame 2, and the two side plates 3 form a hollow enclosed wheel, and further comprising: Reinforcing ribs 4, there are multiple reinforcing ribs 4 and they are evenly arranged along the circumference of the mounting base 1. The reinforcing ribs 4 are disposed between the two side plates 3. The reinforcing ribs 4 are used to connect and fix the two side plates 3. The outer side of the reinforcing ribs 4 is wrapped with carbon yarn 40.

[0019] In another embodiment of this utility model, a circular through hole 10 is provided in the middle of the mounting base 1, and the circular through hole 10 is used to install the hub and bearing; The specific implementation is as follows: The mounting base 1 is coaxially arranged with the wheel rim 2. A hub and bearing are installed in the center of the mounting base 1 through a circular through hole 10. The mounting base 1 is mounted on the bicycle frame (front fork or rear fork) through the hub and bearing. This allows the carbon fiber hollow enclosed wheel to be mounted on the bicycle frame through the hub and bearing in the circular through hole 10, so that the carbon fiber hollow enclosed wheel can move with the frame. At the same time, multiple reinforcing ribs 4 are provided between the two side plates 3 to connect the two side plates 3. The reinforcing ribs 4 have two functions: first, the reinforcing ribs 4 can effectively distribute the force on the wheel and reduce the risk of deformation under high-speed rotation or impact load, thereby enhancing the structural strength and deformation resistance of the carbon fiber hollow enclosed wheel; second, by connecting the side plates 3 of the carbon fiber hollow enclosed wheel, the reinforcing ribs 4 can optimize the overall rigidity of the wheel and reduce the impact of lateral forces. The reinforcing ribs 4, positioned between the side plates 3, reduce torsional distortion, improve riding stability, and increase the torsional stiffness of the carbon fiber hollow enclosed wheel. Secondly, the rational layout of the reinforcing ribs 4 guides airflow, reduces turbulence inside the wheel hub, and further reduces wind resistance. Furthermore, the localized reinforcement of the reinforcing ribs 4 reduces material usage while maintaining strength, thus lowering the weight of the carbon fiber hollow enclosed wheel. Simultaneously, carbon fiber yarn 40 is wrapped around the outside of the reinforcing ribs 4 to increase their strength and prevent deformation of the reinforcing ribs 4 under impact loads during bicycle operation, thereby significantly improving the tensile strength and load-bearing capacity of the lateral stress area of ​​the carbon fiber hollow enclosed wheel. In another embodiment provided by this utility model, a hook edge 20 is provided on the outer side of the wheel frame 2, and a valve hole 21 is provided in the middle of the wheel frame 2; The specific implementation method is as follows: the rubber tire is secured to the outside of the rim 2 via hooks 20. The hooks 20, by tightly fitting the edge of the rubber tire, ensure that the inner tube air does not leak out, maintaining stable tire pressure. The valve hole 21 is made as small as possible to ensure the integrity of the rim 2 structure and the strength of the rim 2. In another embodiment provided by this utility model, the two ends of the side plate 3 are respectively connected to the mounting base 1 and the wheel frame 2; The specific implementation method is as follows: The two ends of the side plate 3 are connected to the mounting base 1 and the wheel frame 2. At the same time, the two side plates 3 respectively enclose the side between the mounting base 1 and the wheel frame 2. The side plate 3 has two functions: First, the side plate 3 can enclose the side between the mounting base 1 and the wheel frame 2. The carbon fiber hollow enclosed wheel adopts a spokeless design, which can significantly reduce airflow turbulence and wind resistance, especially on flat roads or downhill, the speed is significantly improved, allowing the bicycle to obtain greater speed. Second, the side plate 3 can connect the side between the mounting base 1 and the wheel frame 2. The carbon fiber hollow enclosed wheel structure is integrally molded, avoiding energy loss caused by spoke deformation, and the power transmission is more direct when pedaling. Third, the side plate 3 can work with the reinforcing rib 4 to keep the axis between the mounting base 1 and the wheel frame 2 always aligned, reducing or even avoiding the deformation and damage of the carbon fiber hollow enclosed wheel after being subjected to impact loads when the bicycle is moving, and ensuring the shape of the carbon fiber hollow enclosed wheel to avoid bumps when rotating.

[0020] In another embodiment provided by this utility model, an arc portion 41 is symmetrically provided in the middle of the side of the reinforcing rib 4, and the side plate 3 is attached to the side of the reinforcing rib 4. The specific implementation method is as follows: A symmetrical arc portion 41 is provided on the middle of the side of the reinforcing rib 4, that is, the middle of the side of the reinforcing rib 4 is hyperbolic. The change in curvature of the hyperbola can more effectively disperse local stress concentration. Compared with straight lines, the hyperbolic reinforcing rib 4 can significantly reduce peak stress. The shape of the hyperbola can adjust the natural frequency of the structure and suppress resonance. At the same time, the gradual change in shape of the hyperbola reduces the amount of material used while ensuring bending stiffness. Thus, the arc portion 41 of the reinforcing rib 4 can ensure that the carbon fiber hollow enclosed wheel can maintain its shape when subjected to alternating loads, ensuring strength without damage. In addition, the side plate 3 is attached to the side of the reinforcing rib 4, so that the outer side of the side plate 3 follows the side of the reinforcing rib 4 and has a hyperbolic streamline shape, so that the carbon fiber hollow enclosed wheel can optimize airflow turbulence during movement, allowing the bicycle to obtain greater speed. In another embodiment provided by this utility model, the reinforcing rib 4 is made of PMI material; The specific implementation method is as follows: The reinforcing rib 4 is made of PMI (polymethacrylimide, a lightweight, closed-cell rigid foam plastic). The main chain of PMI molecules contains a large number of rigid imide six-membered rings, and there are a large number of hydrogen bonds between molecules, so it has high heat resistance. As a lightweight, closed-cell rigid foam plastic, PMI achieves lightweight design while maintaining high strength, and is widely used in aerospace, transportation and other fields. Thus, carbon yarn 40 is wrapped around the outside of the reinforcing rib 4, so that the carbon yarn 40 can improve the strength of the reinforcing rib 4 and prevent the reinforcing rib 4 from deforming when subjected to impact loads during bicycle movement, thus preventing deformation of the carbon fiber hollow closed wheel. At the same time, it significantly improves the tensile strength and load-bearing capacity of the lateral stress area of ​​the carbon fiber hollow closed wheel.

[0021] Working Principle: The mounting base 1 is coaxially arranged with the wheel rim 2. A hub and bearing are mounted in the center of the mounting base 1 through a circular through-hole 10. The mounting base 1 is then mounted on the bicycle frame (front or rear fork) via the hub and bearing. This allows the entire carbon fiber hollow enclosed wheel to be mounted on the bicycle frame through the hub and bearing within the circular through-hole 10, enabling the carbon fiber hollow enclosed wheel to move with the frame. Simultaneously, multiple reinforcing ribs 4 are provided between the two side plates 3 to connect them. The reinforcing ribs 4 serve two purposes: firstly, they effectively distribute the force on the wheel, reducing the risk of deformation under high-speed rotation or impact loads, thereby enhancing the structural strength and deformation resistance of the carbon fiber hollow enclosed wheel; secondly, by connecting the sides of the carbon fiber hollow enclosed wheel, the reinforcing ribs 4 optimize the overall rigidity of the wheel, reducing torsion caused by lateral forces, improving riding stability, and increasing the torsional stiffness of the carbon fiber hollow enclosed wheel; thirdly, the reinforcing ribs 4 positioned between the side plates 3 can reduce… Fatigue damage is prevented, material aging is delayed, and the service life of the carbon fiber hollow sealed wheel is extended. Secondly, the reasonable layout of the reinforcing rib 4 can guide airflow, reduce turbulence inside the wheel hub, and further reduce the wind resistance of the carbon fiber hollow sealed wheel. Moreover, by locally strengthening the reinforcing rib 4, the amount of material used can be reduced while ensuring strength, thus reducing the weight of the carbon fiber hollow sealed wheel. At the same time, carbon yarn 40 is wrapped around the outside of the reinforcing rib 4 so that the carbon yarn 40 can increase the strength of the reinforcing rib 4 and prevent the reinforcing rib 4 from deforming when subjected to impact loads during bicycle travel, which would cause the carbon fiber hollow sealed wheel to deform. At the same time, it significantly improves the tensile strength and load-bearing capacity of the lateral stress area of ​​the carbon fiber hollow sealed wheel. The rubber tire is fastened to the outside of the wheel frame 2 by the hook edge 20. The hook edge 20 ensures that the inner tube air does not leak out by tightly fitting the edge of the rubber tire, maintaining stable tire pressure. The valve hole 21 is made as small as possible to ensure the integrity of the wheel frame 2 structure and ensure the strength of the wheel frame 2. The two ends of the side plate 3 connect the mounting base 1 to the wheel rim 2. Simultaneously, the two side plates 3 respectively enclose the side surface between the mounting base 1 and the wheel rim 2. The side plates 3 have two functions: First, they enclose the side surface between the mounting base 1 and the wheel rim 2. The carbon fiber hollow enclosed wheel adopts a spokeless design, which significantly reduces airflow turbulence and wind resistance, especially on flat roads or downhill slopes, resulting in a noticeable speed increase and allowing the bicycle to achieve greater speed. Second, the side plates 3 connect the side surface between the mounting base 1 and the wheel rim 2. The carbon fiber hollow enclosed wheel structure is integrally molded, avoiding the energy loss caused by spoke deformation. The side plate 3, in conjunction with the reinforcing rib 4, ensures that the axis between the mounting base 1 and the wheel rim 2 is always aligned, reducing or even preventing deformation and damage to the carbon fiber hollow sealed wheel after impact loads during bicycle operation, thus maintaining the shape of the carbon fiber hollow sealed wheel to avoid bumps during rotation; the reinforcing rib 4 is made of PMI material. The main chain of PMI molecules contains a large number of rigid imide six-membered rings, and there are a large number of hydrogen bonds between molecules, so it has high heat resistance. As a lightweight, closed-cell rigid foam plastic, PMI achieves lightweight design while maintaining high strength. This design, widely used in aerospace, transportation, and other fields, involves wrapping carbon yarn 40 around the outside of the reinforcing rib 4. This not only enhances the strength of the reinforcing rib 4 but also prevents deformation of the carbon fiber hollow enclosed wheel under impact loads during bicycle operation, thus significantly improving the tensile strength and load-bearing capacity of the lateral stress area. The reinforcing rib 4 also features symmetrically arranged arc sections 41 on its side center, meaning the side center of the reinforcing rib 4 is hyperbolic. The change in curvature of the hyperbola more effectively disperses local stress concentration compared to straight lines. The reinforcing rib 4 can significantly reduce peak stress, and the hyperbolic shape can adjust the natural frequency of the structure and suppress resonance. At the same time, the gradual change of the hyperbolic shape can reduce the amount of material used while ensuring bending stiffness. Thus, the arc part 41 of the reinforcing rib 4 can ensure that the carbon fiber hollow enclosed wheel can maintain its shape when subjected to alternating loads, ensuring strength without damage. In addition, the side plate 3 is attached to the side of the reinforcing rib 4, so that the outer side of the side plate 3 follows the side of the reinforcing rib 4 to form a hyperbolic streamline shape, so that the carbon fiber hollow enclosed wheel can optimize airflow turbulence during movement, allowing the bicycle to obtain greater speed.

[0022] The foregoing has only described certain exemplary embodiments of this utility model by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of this utility model. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this utility model.

Claims

1. A carbon fiber hollow enclosed wheel with a central reinforcing rib, comprising a mounting base (1), a wheel frame (2) coaxially disposed on the outer side of the mounting base (1), and two side plates (3) disposed between the wheel frame (2) and the mounting base (1), characterized in that, The mounting base (1), the wheel frame (2), and the two side plates (3) form a hollow enclosed wheel, and further include: Reinforcing ribs (4) are multiple and evenly arranged around the circumference of the mounting base (1). The reinforcing ribs (4) are located between the two side plates (3) and are used to connect and fix the two side plates (3). The outer side of the reinforcing ribs (4) is wrapped with carbon yarn (40).

2. A carbon fiber hollow enclosed wheel with intermediate reinforcing ribs according to claim 1, characterized in that, The mounting base (1) has a circular through hole (10) in the middle, which is used to install the hub and bearing.

3. A carbon fiber hollow enclosed wheel with intermediate reinforcing ribs according to claim 1, characterized in that, The outer side of the wheel frame (2) is provided with a hook edge (20), and the middle part of the wheel frame (2) is provided with a valve hole (21).

4. A carbon fiber hollow enclosed wheel with intermediate reinforcing ribs according to claim 1, characterized in that, The two ends of the side plate (3) are respectively connected to the mounting base (1) and the wheel frame (2).

5. A carbon fiber hollow enclosed wheel with intermediate reinforcing ribs according to claim 1, characterized in that, The reinforcing rib (4) has a symmetrically arranged arc portion (41) in the middle of its side, and the side plate (3) is attached to the side of the reinforcing rib (4).

6. A carbon fiber hollow enclosed wheel with intermediate reinforcing ribs according to claim 5, characterized in that, The reinforcing rib (4) is made of PMI material.

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