TW202014315A - Composite wheel rim - Google Patents

Abstract

A composite wheel rim defines a center of circle. The composite wheel rim includes an outer frame and an inner frame which are both made of composite material. The outer frame has a radial cross-section which is V-shaped. The outer frame has a bottom and an opening. The inner frame has a radial cross-section which is U-shaped and is arranged in the opening of the outer frame to close the opening of the outer frame. The inner frame has a bottom portion and two lateral portions extending from two ends of the bottom portion. The two lateral portions are engaged with the outer frame. Each of the lateral portions has a hook portion at an end away from the bottom portion. The two hook portion bend toward each other. A section of each lateral portion between the hook portion and the bottom portion has a minimum thickness ranged 1.0 mm to 1.5 mm.

Description

Composite wheels

The invention relates to a composite material rim.

The cross section of the conventional carbon fiber bicycle rim is composed of a larger V-shaped region and a smaller U-shaped region located at the opening of the V-shaped region. The two side walls of the U-shaped region are usually used as the brake side for the brake, so it is often It is formed by stacking at least 10 layers of carbon fiber cloth to provide sufficient thickness and structural strength.

However, today's bicycle brake systems mostly use disc brake systems, especially for sports cars used in competitions. The structural strength of the side walls of the U-shaped area no longer requires such high requirements. On the contrary, the thicker rims increase the weight. The burden is greater.

The main purpose of the present invention is to provide a composite rim, which can achieve extremely light weight, reduce materials and costs, and increase riding speed.

To achieve the above object, the present invention provides a composite rim, which defines a center of circle, and the composite rim includes an outer frame portion and an inner frame portion.

The outer frame portion has a V-shaped radial section and has a bottom portion farther away from the center of the circle and an opening closer to the center of the circle. The outer frame portion is formed of a composite material; the inner frame portion has a U-shaped radial section and is provided with The opening is closed in the opening of the outer frame portion. The inner frame portion is formed of composite material. The inner frame portion has a bottom portion farther away from the center of the circle and two side walls extending from both ends of the bottom toward the center of the circle The two side wall portions of the inner frame portion and the outer frame portion are connected to each other, and each end of the side wall portion away from the bottom of the inner frame portion is provided with an inner hook portion, the two inner hook portions are bent toward each other, and each of the side wall portions The minimum thickness of the portion between the inner hook portion and the bottom of the inner frame portion is 1.0 mm to 1.5 mm.

The following merely illustrates the possible implementation forms of the present invention with examples, but it is not intended to limit the scope of the invention to be protected, and will be described first.

Please refer to FIGS. 1 to 6, the present invention provides a composite rim, which defines a center of circle. The composite rim includes an outer frame portion 10 and an inner frame portion 20.

The outer frame portion 10 has a V-shaped radial cross section and has a bottom portion farther away from the center of the circle and an opening closer to the center of the circle. The outer frame portion 10 is formed of a composite material; the inner frame portion 20 has a U-shaped radial section It is formed in the opening of the outer frame portion 10 to close the opening. The inner frame portion 20 is formed of composite material. The inner frame portion 20 has a bottom 201 farther away from the center of the circle and two ends from the bottom 201 Two side wall portions 202 extending toward the center of the circle, the two side wall portions 202 of the inner frame portion 20 and the outer frame portion 10 are connected to each other, and each end of the side wall portion 202 away from the bottom 201 of the inner frame portion 20 is provided with an inner hook Part 203, the two inner hook parts 203 are bent toward each other, each part of the side wall part 202 located between the inner hook part 203 and the bottom part 201 of the inner frame part 20 has a minimum thickness of 1.0 mm to 1.5 mm, and each of the side walls The shortest distance d from the end of the portion 202 farther away from the bottom 201 to the bottom 201 is greater than 5.1 mm (in this embodiment, the bottom has a concave central portion and two side portions closer to the two side wall portions, each The shortest distance d from the end of the side wall portion 202 farther away from the bottom 201 to the side of the bottom 201 is greater than 5.1 mm).

Preferably, the radial cross section of the inner frame portion 20 is formed by laminating 4 to 15 layers of composite materials. More preferably, at least one of the composite material layers is arranged by carbon fibers at an angle of 90 degrees±15 Carbon fiber cloth with a total thickness greater than or equal to 0.3mm (may be only one composite layer is composed of carbon fiber cloth with a temperature of 90 degrees ± 15 degrees and its thickness is directly greater than or equal to 0.3mm, or there are multiple composite material layers It is composed of carbon fiber cloth of 90 degrees ± 15 degrees and the total thickness of these composite layers is greater than or equal to 0.3 mm, and the composite layers of these carbon fiber cloths of 90 degrees ± 15 degrees may be stacked next to each other or separated from each other and arranged at intervals Specifically, in this embodiment, the composite layers at least include a first composite layer 21, a second composite layer 22, and a third composite layer 23, the second composite layer 22 The third composite material layer 23 is sequentially stacked on the middle portion of the first composite material layer 21, and then bent with both ends of the first composite material layer 21 to form the two side wall portions 202, the first composite material layer 21 The two ends of the are further folded back onto the third composite material layer 23 so that the radial cross section of the inner frame portion 20 has a four-layer structure; in more detail, the first composite material layer 21 is FAW (Fiber Areal Weight, fiber Weight per unit area) -100 degree +45 degree carbon fiber cloth and FAW-100 -45 degree carbon fiber cloth are formed together, the second composite layer 22 is FAW-200 90 degree carbon fiber cloth and FAW-100 90 degree carbon fiber cloth Formed together, the third composite material layer 23 is a 90-degree carbon fiber cloth of FAW-200. Preferably, both ends of the first composite material layer 21 are covered by a fourth composite material layer 24, and the fourth composite material Layer 24 is SCRIM mesh.

However, the composite material layers may not be formed by laminating and laminating, or may be formed by winding a composite material on the outer surface of the inner mold, for example, a carbon fiber cloth of FAW-100.

With the above structure, the side wall of the inner frame portion of the composite rim provided by the present invention is thin, which achieves an excellent lightweight effect, but is sufficient to provide tire support. , It can reduce the weight of the rim to the maximum to improve the speed, and the structural strength is enough to meet the demand, which is very effective.

10: outer frame portion 20: inner frame portion 201: bottom portion 202: side wall portion 203: inner hook portion 21: first composite layer 22: second composite layer 23: third composite layer 24: fourth composite layer d: shortest distance

Fig. 1 is a perspective view of an inner frame portion of the present invention. 2 is a schematic diagram of the composite material layer of the inner frame portion of the present invention. 3 is a cross-sectional view of the inner frame portion of the present invention. 4 is a cross-sectional view of the present invention. Fig. 5 is a perspective schematic view of the present invention. 6 is a perspective view of the present invention.

20: inner frame

21: The first composite layer

22: Second composite layer

23: The third composite layer

d: shortest distance

Claims (7)

A composite rim defines a circle center. The composite rim includes: an outer frame portion having a V-shaped radial section and having a bottom part farther away from the center and an opening closer to the center, the outer frame part It is formed by composite materials; an inner frame portion, which is U-shaped in radial section and is provided in the opening of the outer frame portion to close the opening, the inner frame portion is formed of composite material, and the inner frame portion has a distance One bottom of the circle center and two side wall portions extending from both ends of the bottom toward the center of the circle, the two side wall portions of the inner frame portion and the outer frame portion are connected to each other, and each of the side wall portions is away from one end of the bottom of the inner frame portion An inner hook portion is provided, the two inner hook portions are bent toward each other, and the minimum thickness of each portion of the side wall portion between the inner hook portion and the bottom of the inner frame portion is 1.0 mm to 1.5 mm. The composite rim according to claim 1, wherein the radial cross section of the inner frame portion is formed by laminating 4 to 15 layers of composite materials. The composite material rim according to claim 2, wherein at least one of the composite material layers is composed of carbon fiber cloth with a carbon fiber arrangement angle of 90 degrees ± 15 degrees and its total thickness is greater than or equal to 0.3 mm. The composite rim of claim 2, wherein the composite layers include at least a first composite layer, a second composite layer and a third composite layer, the second composite layer and the first Three composite layers are sequentially stacked on the middle portion of the first composite layer and then bent with the two ends of the first composite layer to form the two side wall portions, the two ends of the first composite layer are further folded back to the In the third composite material layer, the radial cross section of the inner frame portion has a four-layer structure. The composite rim according to claim 4, wherein the first composite layer is formed of +45 degree carbon fiber cloth of FAW-100 and -45 degree carbon fiber cloth of FAW-100, and the second composite layer is FAW The 90-degree carbon fiber cloth of -200 is formed together with the 90-degree carbon fiber cloth of FAW-100, and the third composite layer is a 90-degree carbon fiber cloth of FAW-200. The composite rim of claim 5, wherein both ends of the first composite material layer are covered by a fourth composite material layer, and the fourth composite material layer is a SCRIM mesh cloth. The composite rim of claim 1, wherein the shortest distance from the end of each side wall portion farther away from the bottom to the bottom is greater than 5.1 mm.

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