Disc wheel rim structure

Abstract

The utility model discloses a disc wheel rim structure. Comprising a rim body and a connecting hole used for installing a hub in the middle of the rim body, and the rim body comprises supporting thin layers laid on the two faces of a PBO honeycomb filling layer. According to the rim body provided by the scheme, the structure does not need to be made into a shape with a drum in the middle and two thin sides, and the safety is still ensured while the whole rim body is lighter and thinner; the PBO honeycomb filling layer is light in weight, high in strength and suitable for the use scene of the disc wheel.

Description

Technical Field

[0001] The present invention relates to the field of disc wheels, and in particular to a disc wheel rim structure. Background Art

[0002] In recent years, with the popularity of various cycling sports, the demands for bicycles have become diversified; whether it is a general riding bicycle, or a racing or mountaineering bicycle, there are different demands for bicycle specifications. Racing bicycles often use disc wheels, which are also called closed wheels. In indoor track competitions, front and rear disc wheels are a very common configuration.

[0003] In the prior art, the rim body generally includes two discs, and the middle layer in each disc is generally filled with polyurethane foam material. This structural setting makes the disc wheel too thick as a whole. In order to meet the demand for lightweight, the manufacturer makes the middle layer into a hollow structure. However, in order to meet the support requirements, the middle layer in the hollow state must be thickened in the middle to form an arch bridge effect. Therefore, no matter which situation is, it is impossible to avoid the problem of too thick overall thickness and high resistance. In the prior art, such as Figure 1 As shown, the overall structure of the disc wheel is set to be a drum in the middle and thin on both sides. The supporting force can be enhanced by the arch bridge effect during movement, but the setting of this structure increases the thickness and weight of the disc wheel. In the prior art, the thickness of the bulging part of the disc wheel is generally about 10 cm.

[0004] The disc wheel is different from the common bicycle wheel. There is no spoke support inside the disc wheel. In the prior art, it mainly relies on the wheel frame and two discs. In order to meet the support requirements, the disc itself needs to have a certain thickness, and the middle needs to be filled with foam material or a hollow structure. The molding process in the prior art includes the following steps:

[0005] (Considering that the hollow structure is lighter than the filled molding process, only the preparation process of the disc wheel with a hollow structure in the middle is described here.)

[0006] S1. Place the inner cavity mold (usually a plastic airbag bag, which serves as an auxiliary function) between the two steel plates of the disc mold;

[0007] S2, injecting gas into the inner cavity mold until it is combined with the disc mold;

[0008] S3, remove the disc mold and lay carbon cloth on the outside of the inner cavity mold;

[0009] S4. After the disc is formed, the inner cavity mold is removed.

[0010] The Chinese patent with publication number CN208664806U and application date July 27, 2018 discloses a lightweight disc wheel with an inner lining plate, including a rim body, a cavity is provided inside the rim body, an engineering plastic support thin layer is provided on the inner wall of the cavity, a carbon fiber cloth is provided on the outer wall of the engineering plastic support thin layer, a connecting hole is provided through the center of the rim body surface, and a wind flow hole is provided through the rim body surface on one side of the connecting hole. The disadvantage is that in terms of the overall structure, although the thickness of the carbon fiber cloth is thinner than that of a traditional disc wheel, in order to meet the support requirements, the thickness of the hollow structure in the middle of the disc must not be reduced; in addition, in terms of the manufacturing process, the process is cumbersome, troublesome, time-consuming and labor-intensive.

[0011] Therefore, there is a need for a disc wheel rim structure that can be thinner and lighter while meeting safety requirements. Summary of the invention

[0012] In order to solve the above-mentioned problem, this scheme provides a disc wheel rim structure.

[0013] To achieve the above-mentioned purpose, the technical solution adopted in this scheme is: a disc wheel rim structure, including a rim body, a connecting hole in the middle for limiting the hub and a groove on the outside for limiting the tire, and the rim body includes a supporting thin layer laid on both sides of a PBO honeycomb filling layer.

[0014] Furthermore, the PBO honeycomb filling layer is a honeycomb plate structure, and each pore size of the PBO honeycomb filling layer is 2 to 3 mm.

[0015] Furthermore, each pore size of the PBO honeycomb filling layer is 2.5 cm.

[0016] Furthermore, the rim body has the same thickness at the top and bottom, ranging from 2.8 to 3 cm.

[0017] Furthermore, the thickness of the rim body is 2.9 cm.

[0018] Furthermore, the supporting thin layer is carbon fiber cloth.

[0019] Furthermore, the supporting thin layer includes an intermediate layer between two layers of carbon fiber cloth.

[0020] Furthermore, the middle layer between the carbon fiber cloths is a hollow layer or a PBO fiber filler.

[0021] In summary, this solution has the following advantages:

[0022] The rim body provided by this solution does not need to be made into a middle drum structure, and the two sides are thin, which makes the overall structure lighter and thinner while still ensuring safety; the PBO honeycomb filling layer is light in weight but high in strength, and is suitable for the use scenarios of disc wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of a bicycle disc wheel in the prior art;

[0024] Figure 2 is a schematic cross-sectional view of the disc wheel rim in this scheme;

[0025] Figure 3 It is a schematic diagram of a disc wheel rim structure;

[0026] Figure 4 This is the structural diagram of the PBO honeycomb filling layer;

[0027] Figure 5 is a cross-sectional view of the disc wheel rim in the first embodiment;

[0028] Figure 6 is a cross-sectional view of the disc wheel rim in the second embodiment;

[0029] Figure 7 It is a cross-sectional view of the disc wheel rim in the third embodiment.

[0030] in:

[0031] 1. Rim body; 11. PBO honeycomb filling layer; 12. Support thin layer; 121. Carbon fiber cloth;

[0032] 122, middle layer; 122a, hollow layer; 122b, PBO fiber filler; 13, connecting hole; 14, groove. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0034] Embodiment 1:

[0035] A disc wheel rim structure, such as Figure 2-5 As shown, the rim body 1 includes a PBO honeycomb filling layer 11 and support thin layers 12 laid on both sides.

[0036] In this solution, the rim body 1 provided, the PBO honeycomb filling layer 11 used in the middle has the advantages of low density and high rigidity. The PBO fiber has excellent modulus, making it difficult to deform when subjected to force. When it encounters damage, its material properties can also ensure rigidity and greater safety. Therefore, through the molding process of this solution, such as Figure 2 and 3 As shown, the rim body 1 has a consistent thickness from top to bottom, and does not need to be bulged in the middle. The rim body 1 is thin on both sides, which makes the rim body lighter and thinner as a whole while still ensuring safety.

[0037] like Figure 4As shown, the PBO honeycomb filling layer 11 is a honeycomb panel structure, and a carbon fiber cloth 121 is laid on the outside.

[0038] The diameter of each hole of the PBO honeycomb filling layer 11 is 2-3 mm, and the honeycomb plate structure is light in weight but high in strength, and is suitable for the use of disc wheels. In this embodiment, the diameter of each hole of the PBO honeycomb filling layer 11 is 2.5 cm.

[0039] In the structural setting of this scheme, the thickness of the rim body 1 is consistent from top to bottom, ranging from 2.8 to 3 cm, and the weight is less than 0.85 kg. In this embodiment, the thickness of the rim body 1 is 2.9 cm, and the weight is 0.83 kg.

[0040] In this embodiment, the supporting thin layer 12 is a carbon fiber cloth 121. T800 carbon fiber cloth is preferred, which has very high rigidity and strength and is very light, thus reducing the overall weight of the rim body 1.

[0041] Specifically, after the PBO honeycomb filling layer 11 is manufactured, carbon fiber cloth 121 is laid on both the front and back surfaces thereof.

[0042] In the molding process provided by the present solution, the PBO honeycomb filling layer 11 is used to replace the inner and outer molds, which simplifies the molding process and overcomes the problem of excessive weight of the disc wheel in the prior art.

[0043] The connecting hole 13 in this solution is used to install the hub, and after installation, the hub is connected to the bicycle body.

[0044] The rim body 1 further includes a groove 14, and the groove 14 is used to limit the tire.

[0045] The forming process of the disc wheel rim structure comprises the following steps:

[0046] S1. A PBO honeycomb filling layer is made based on the shape of the cavity (the manufacture of the PBO honeycomb filling layer belongs to the prior art and is completely achievable. This scheme provides an implementation method based on the prior art);

[0047] First, aniline is mixed with a solvent and an appropriate amount of additives are added. Then, a polymerization reaction is carried out at a constant temperature. During the reaction, the temperature and reaction time are controlled to make the aniline molecules undergo a polymerization reaction to form polybenzimidazole. After the polymerization reaction is completed, the obtained product is a mixture.

[0048] The mixture is added to the solvent and stirred thoroughly to dissolve the mixture evenly. Then, the dissolved liquid is spun through a spinning machine. During the spinning process, the dissolved liquid is gradually solidified to form continuous fibers by controlling parameters such as temperature, humidity and stretching speed.

[0049] During the curing process, the polybenzimidazole molecules in the fiber are further cross-linked by controlling parameters such as temperature and time, and a high-strength PBO fiber structure is formed. The curing process can be performed using a thermosetting resin or other cross-linking agent.

[0050] The strength and toughness of PBO fibers are enhanced by stretching, and PBO fibers are heat-formed into a honeycomb panel structure and processed into corresponding shapes according to cavity requirements.

[0051] S2. Lay supporting thin layers on both sides of the PBO honeycomb filling layer.

[0052] Carbon fiber cloth is laid on both sides of the PBO honeycomb filling layer.

[0053] Embodiment 2:

[0054] The features of this embodiment that are different from those of the first embodiment are as follows:

[0055] In this embodiment, reference Figure 6 The supporting thin layer 12 includes an intermediate layer 122 between two layers of carbon fiber cloth 121, and the intermediate layer 122 is preferably a hollow layer 122a.

[0056] In the structural setting of this embodiment, a hollow layer 122a is set in the carbon fiber cloth 121. Although the thickness is thicker than that of the first embodiment, combined with the PBO honeycomb filling layer 11, the overall thickness is still thinner than the prior art, and the consistent upper and lower widths will not affect the use of the product. In addition, the hollow layer 122a has a low density and is lighter in weight.

[0057] Embodiment three:

[0058] The features of this embodiment that are different from those of Embodiment 1 and Embodiment 2 are as follows:

[0059] In this embodiment, reference Figure 7 The middle layer 122 between the two layers of carbon fiber cloth 121 is a PBO fiber filler 122B.

[0060] In the structural setting of this embodiment, the PBO fiber filler 122B added to the carbon fiber cloth 121, although its density is greater than that of the hollow layer 122a and its weight is heavier, combined with the characteristics of the PBO fiber, when the product is made using this structure, it is less likely to deform when subjected to force, and when it encounters damage, it can also ensure rigidity and greater safety.

[0061] In summary, the rim body provided by the present application does not need to be made into a middle drum, and the structure of the two sides is thin, which is lighter and thinner as a whole while still ensuring safety; the PBO honeycomb filling layer is light in weight but high in strength, and is suitable for the use of disc wheels;

[0062] In the molding process provided by this solution, a PBO honeycomb filling layer is used to replace the inner and outer molds, which simplifies the molding process and overcomes the problem of excessive weight of the disc wheel in the prior art.

[0063] The above implementation is only to illustrate the technical concept and features of this solution, and its purpose is to enable people familiar with this technology to understand the content of this solution and implement it accordingly, and it cannot be used to limit the protection scope of this solution. Any equivalent transformation or modification made according to the spirit of this solution should be included in the protection scope of this solution.

[0064] In the description of this scheme, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0065] For those skilled in the art, the specific meanings of the above terms in this solution can be understood according to specific circumstances.

[0066] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present solution, various obvious or equivalent modifications or substitutions that can be made by technicians in this field to the above details will be included in the protection scope of the present solution.

Claims

1. A disc wheel rim structure, characterized in that: The rim body (1) comprises a rim body (1), a connection hole (13) in the middle for limiting the hub, and a groove (14) on the outside for limiting the tire. The rim body (1) comprises a supporting thin layer (12) laid on both sides of a PBO honeycomb filling layer (11).

2. The disc wheel rim structure according to claim 1, characterized in that: The diameter of each hole of the PBO honeycomb filling layer (11) is 2 to 3 mm.

3. The disc wheel rim structure according to claim 1, characterized in that: The diameter of each hole of the PBO honeycomb filling layer (11) is 2.5 cm.

4. The disc wheel rim structure according to claim 1, characterized in that: The rim body (1) has a consistent thickness at the top and bottom, ranging from 2.8 to 3 cm.

5. The disc wheel rim structure according to claim 1, characterized in that: The thickness of the rim body (1) is 2.9 cm.

6. The disc wheel rim structure according to claim 1, characterized in that: The supporting thin layer (12) is a carbon fiber cloth (121).

7. The disc wheel rim structure according to claim 1, characterized in that: The supporting thin layer (12) comprises an intermediate layer (122) between two layers of carbon fiber cloth (121).

8. The disc wheel rim structure according to claim 7, characterized in that: The middle layer (122) between the carbon fiber cloths (121) is a hollow layer (122a) or a PBO fiber filler (122b).

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