Novel carbon fiber disc wheel

Abstract

The utility model discloses a novel carbon fiber disc wheel which comprises a rim and a side plate fixed on the side face of the rim, the side plate comprises an inner carbon fiber layer, an outer carbon fiber layer and a foaming layer arranged between the inner carbon fiber layer and the outer carbon fiber layer, and the foaming layer is provided with a plurality of hollow holes. And the inner carbon fiber layer and the outer carbon fiber layer are mutually attached and fixed at the hollow holes. According to the carbon fiber disc wheel, the foaming layer is additionally arranged in the side plate, meanwhile, the hollow holes are formed in the foaming layer, and the inner carbon fiber layer and the outer carbon fiber layer are mutually attached and fixed at the hollow holes, so that the rigidity and the strength of the whole disc wheel are greatly improved, and the overall performance of the disc wheel is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber disc wheels, in particular to a novel carbon fiber disc wheel. Background Art

[0002] Carbon fiber disc wheels are often used in racing bicycles because of their light weight and high strength. In order to reduce weight and strengthen the existing carbon fiber disc wheels, a foam layer is usually embedded in the side panels of the disc wheel. The foam layer increases the strength of the side panels without substantially increasing their weight, thereby improving the overall performance of the disc wheel. However, the carbon fiber layers on both sides of the foam layer are completely separated by the foam layer and are only bonded at the edges of the foam layer. The bonding of the carbon fiber layers on both sides is not strong enough, and the carbon fiber layer and the foam layer are also prone to delamination. This is a problem that needs to be solved urgently for carbon fiber disc wheels. In view of this, the inventors of the present application have invented a new type of carbon fiber disc wheel. Utility Model Content

[0003] The utility model aims to provide a novel carbon fiber disc wheel which can effectively improve its strength.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of carbon fiber disc wheel, including a rim and a side panel fixed on the side of the rim, the side panel including an inner carbon fiber layer, an outer carbon fiber layer, and a foaming layer arranged between the inner carbon fiber layer and the outer carbon fiber layer, the foaming layer is provided with a plurality of hollow holes, and the inner carbon fiber layer and the outer carbon fiber layer are bonded and fixed to each other at the hollow holes.

[0005] Furthermore, the inner carbon fiber layer protrudes outward at the hollow hole and is bonded and fixed to the outer carbon fiber layer.

[0006] Furthermore, the sum of the areas of the hollow holes accounts for 1 / 6-3 / 6 of the area of ​​the foaming layer.

[0007] Furthermore, the foaming layer is a one-piece integral structure.

[0008] Furthermore, the outer diameter of the foaming layer is smaller than the outer diameters of the inner carbon fiber layer and the outer carbon fiber layer.

[0009] Furthermore, the foaming layer is annular, and the thickness of the inner edge and the outer edge of the foaming layer are both smaller than the thickness of the middle portion.

[0010] Furthermore, the foaming layer is a PMI layer, and the density of the PMI is 0.05-0.3 g / cm 3 .

[0011] Furthermore, the hollow holes are arranged in a circle along the center of the foaming layer, and multiple circles of hollow holes are provided along the inner edge to the outer edge of the foaming layer, and the hollow holes in adjacent circles are staggered.

[0012] After adopting the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model provides a carbon fiber disc wheel with a foaming layer added to the side plate and hollow holes in the foaming layer. The inner carbon fiber layer and the outer carbon fiber layer are bonded and fixed to each other at the hollow holes, so that the rigidity and strength of the entire disc wheel are greatly improved, and the overall performance thereof is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of a disc wheel according to an embodiment of the utility model;

[0015] Figure 2 This is an exploded view of the disc wheel of the utility model embodiment;

[0016] Figure 3 This is a schematic diagram of the side panel of the utility model embodiment after the inner carbon fiber layer is hidden;

[0017] Figure 4 This is a cross-sectional view of the inner carbon fiber layer, the foaming layer, and the outer carbon fiber layer in an embodiment of the present utility model.

[0018] Description of reference numerals:

[0019] 10- Rim,

[0020] 20-side panels,

[0021] 21-Inner carbon fiber layer,

[0022] 22-Outer carbon fiber layer,

[0023] 23-foaming layer, 231-hollow hole,

[0024] 24-Hub hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0027] Cooperate Figures 1 to 4As shown, the utility model discloses a novel carbon fiber disc wheel, including a wheel rim 10 and a side panel 20 fixed to the side of the wheel rim 10, the side panel 20 including an inner carbon fiber layer 21, an outer carbon fiber layer 22, and a foaming layer 23 arranged between the inner carbon fiber layer 21 and the outer carbon fiber layer 22, the foaming layer 23 is provided with a plurality of hollow holes 231, and the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are adhered and fixed to each other at the hollow holes 231.

[0028] The wheel rim 10 is annular and is integrally formed of carbon fiber. The outer periphery of the wheel rim 10 is provided with a tire groove, and the inner side is generally provided with spoke holes for installing spokes.

[0029] There are two side panels 20, which are fixed on both sides of the wheel rim 10 respectively, and enclosed with the wheel rim 10 to form a relatively closed space. A hub hole 24 for mounting a hub (not shown in the figure) is provided in the middle of the side panel 20. The two side panels 20 have slightly different shapes, but have the same internal structure, and both include an inner carbon fiber layer 21, an outer carbon fiber layer 22, and a foaming layer 23 provided between the inner carbon fiber layer 21 and the outer carbon fiber layer 22. The foaming layer 23 is wrapped between the inner carbon fiber layer 21 and the outer carbon fiber layer 22. The foaming layer 23 increases the thickness of the entire side panel 20, which can effectively increase its strength.

[0030] Among them, a plurality of hollow holes 231 are provided on the foaming layer 23, and the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are bonded and fixed to each other at the hollow holes 231. The carbon fiber product is to fix multiple layers of carbon fiber cloth together under heating and pressurization conditions by resin. The design of the hollow holes 231 ensures that the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are not completely isolated, and the bonding position and area of ​​the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are increased, which can effectively enhance the strength of the entire side panel 20. In addition, compared with the design of completely isolating the inner carbon fiber layer 21 from the outer carbon fiber layer 22 by the entire foaming layer, designing the hollow holes 231 in the foaming layer 23 can also slightly reduce the weight of the disc wheel.

[0031] Cooperate Figures 2 to 3 As shown, the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are both annular, and the through holes in the middle cooperate with each other to form a hub hole 24 for installing the hub. After the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are bonded and fixed, their outer diameters are equal, and the foam layer 23 is correspondingly annular, and the inner diameter of the foam layer 23 is larger than the outer diameter of the hub hole 24. At the same time, the outer diameter of the foam layer 23 is smaller than the outer diameters of the inner carbon fiber layer 21 and the outer carbon fiber layer 22. In this way, the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are bonded and fixed along the inner and outer edges of the foam layer 23, respectively. In addition, the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are also bonded and fixed correspondingly at the hollow holes 231 of the foam layer 23. The bonding between the inner carbon fiber layer 21 and the outer carbon fiber layer 22 is more firmly, which is beneficial to further improve the strength of the side panel 20.

[0032] Among them, the thickness of the inner edge and the outer edge of the foaming layer 23 are both smaller than the thickness in the middle part. The thickness of the inner edge (inner peripheral edge) and the outer edge (outer peripheral edge) of the foaming layer 23 changes from large to small. This makes it easier for the inner carbon fiber layer 21 and the outer carbon fiber layer 22 to be attached and fixed along the inner and outer edges of the foaming layer 23. The formed side panel 20 has a smooth transition at the edge, which is more beautiful.

[0033] In this embodiment, the foaming layer 23 is a PMI layer, which is polymethacrylimide (PMI) foam plastic, a lightweight, closed-cell rigid foam plastic. The foaming layer 23 is preferably made of PMI, but can also be made of other suitable materials. The density of the PMI used is 0.05-0.3 g / cm 3 In addition, the foaming layer 23 is a one-piece integral structure, the foaming layer 23 is stronger, and there will be no splicing error problem during the production and processing process.

[0034] The sum of the areas of the hollow holes 231 accounts for 1 / 6-3 / 6 of the area of ​​the foam layer 23. The foam layer 23 is provided with a plurality of hollow holes 231, and the sum of the areas of all the hollow holes 231 accounts for 1 / 6-3 / 6 of the area of ​​the entire foam layer 23, wherein the area of ​​the entire foam layer 23 includes the area of ​​the hollow holes 231 of the foam layer 23. The foam layer 23 can increase the strength of the side panel 20 by increasing the thickness of the side panel 20. The area of ​​the hollow holes 231 should not be too large, but it should not be too small. If it is too small, the position and area of ​​the inner carbon fiber layer 21 and the outer carbon fiber layer 22 are not enough to be fixed, which will also affect the thickness of the side panel 20. Preferably, the sum of the areas of the hollow holes 231 accounts for about 1 / 3 of the area of ​​the foam layer 23.

[0035] In this embodiment, the hollow holes 231 are arranged in a circle along the center of the foam layer 23, and multiple circles of hollow holes 231 are provided along the inner edge to the outer edge of the foam layer 23, and the hollow holes 231 of adjacent circles are staggered along the diameter direction of the foam layer 23. The shape of the hollow holes 231 can be a regular hexagon, a regular pentagon, a square, a circle, or other regular or irregular shapes.

[0036] Cooperate Figures 2 to 4As shown, in this embodiment, the inner carbon fiber layer 21 is convex at the hollow hole 231 and is fixed to the outer carbon fiber layer 22. The inner carbon fiber layer 21 and the outer carbon fiber layer 22 should be fitted at the hollow hole 231, and the inner carbon fiber layer 21 convexly passes through the hollow hole 231 and is fixed to the outer carbon fiber layer 22. In this way, the outer carbon fiber layer 22 will not have unevenness, and the concave surface only appears on the inner side of the side plate 20 (the side fixed to the wheel rim 10), and the outer side of the side plate 20 will not have unevenness. When the side plates 20 on both sides are fixed to the wheel rim 10, the inner carbon fiber layer 21 is hidden, which can effectively ensure the aesthetic appearance of the entire disc wheel. When producing the side panel 20, the outer carbon fiber layer 22, the foaming layer 23, and the inner carbon fiber layer 21 are pre-formed first, and then put into a mold together for heating and pressurization. When being formed in the mold, the outer carbon fiber layer 22 is bonded to the inner wall of the mold cavity, and the air bag is bonded to the inner carbon fiber layer 21. The air bag is inflated and pressurized, and finally the inner carbon fiber layer 21 bulges outward at the hollow hole 231 and is bonded and fixed to the outer carbon fiber layer 22.

[0037] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A new type of carbon fiber disc wheel, characterized by: It includes a wheel rim and a side panel fixed on the side of the wheel rim, the side panel includes an inner carbon fiber layer, an outer carbon fiber layer, and a foaming layer arranged between the inner carbon fiber layer and the outer carbon fiber layer, the foaming layer is provided with a plurality of hollow holes, and the inner carbon fiber layer and the outer carbon fiber layer are bonded and fixed to each other at the hollow holes.

2. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The inner carbon fiber layer protrudes outward at the hollow hole and is fixedly attached to the outer carbon fiber layer.

3. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The sum of the areas of the hollow holes accounts for 1 / 6-3 / 6 of the area of ​​the foaming layer.

4. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The foaming layer is a one-piece integral structure.

5. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The outer diameter of the foaming layer is smaller than the outer diameters of the inner carbon fiber layer and the outer carbon fiber layer.

6. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The foaming layer is annular, and the thickness of the inner edge and the outer edge of the foaming layer are both smaller than the thickness of the middle portion.

7. A novel carbon fiber disc wheel as claimed in claim 1, characterized in that: The foaming layer is a PMI layer, and the density of the PMI is 0.05-0.3 g / cm 3 .

8. The novel carbon fiber disc wheel according to claim 1, characterized in that: The hollow holes are arranged in a circle along the center of the foaming layer, and multiple circles of hollow holes are provided along the inner edge to the outer edge of the foaming layer, and the hollow holes in adjacent circles are staggered.

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