WO2011116630A1

WO2011116630A1 - Improved bicycle carbon fiber rim structure and manufacture method thereof

Info

Publication number: WO2011116630A1
Application number: PCT/CN2011/000464
Authority: WO
Inventors: 王景山; 卓建议
Original assignee: 厦门鸿基伟业复材料科技有限公司
Priority date: 2010-03-25
Filing date: 2011-03-21
Publication date: 2011-09-29

Abstract

An improved bicycle carbon fiber rim (1) structure comprises an independent inner cavity (11) and an independent outer cavity (12). The two cavities are formed by carbon fiber layers in an integrated manner. A metal shell strengthening piece (2) matching with the shape of the outer cavity (12) is arranged in the inner wall of said outer cavity (12). A manufacture method of said rim (1) structure comprises the follow steps: making an aluminum core shaft, making an outer cavity (12) blank, making an inner cavity (11) blank, making a rim (1) blank, pressing, heating, cooling and solidifying said rim (1) blank, and forming a gap (122) on said outer cavity (12). The structure can improve the braking stability of the bicycle, and prevent the rim (1) from being damaged and cracked, thus prolong the service life of the rim (1).

Description

Improved bicycle carbon fiber rim structure and manufacturing method thereof

The present invention relates to a bicycle carbon fiber rim structure, and more particularly to a cavity structure of a carbon fiber rim inner tube and a method of fabricating the same. Background technique

Because carbon fiber bicycles are light in weight and good in strength, they are very popular among bicycle lovers. In order to make the performance of carbon fiber bicycles better and better, the producers continue to research and develop new structures of carbon fiber bicycle parts, which makes the product quality and performance more ideal. . The carbon fiber rim is an important part of the bicycle, and the structural improvement is also very important. The cross-sectional structure of the commonly used carbon fiber rim 1 is as shown in Fig. 1, which includes two independent inner 11 and outer 12 cavities, and the inner cavity 11 In order to be closed, the spoke nut locks the outer end of the spoke in the cavity, and the outer cavity 12 is an open cavity for the inner tube of the bicycle; the upper side walls 121 of the outer cavity of the rim are parallel to each other to form a brake position. When the bicycle is running, the brake pads forcefully clamp the parallel two side walls 13 to stop the rotating rim 1 by frictional force, and the purpose of braking is activated; therefore, when the brake pads clamp the forces of the two parallel side walls 121 The larger the friction, the greater the friction generated, and the shorter the time for the rim to stop moving. This requires high strength of the two side walls 121 of the outer cavity 12, and the wheel as shown in FIG. The ring structure, the two cavities are formed by the carbon fiber. Since the outer cavity 12 has a notch 122 of the inner tube of the device, it is not a complete body, and the two side walls 121 are easily deformed when being clamped by the brake pads, and act on the two side walls. The clamping force of 121 is weakened Good braking effect, reduces the reliability of the brake; and the side walls often sandwiched by the external force, easy to crack, impact strength of the rim, so that the service life of the rim Lower.

Summary of the invention

In order to solve the technical problems existing in the prior art, the present invention provides an improved bicycle carbon fiber rim structure which overcomes the disadvantages of the background art, increases the service life of the carbon fiber rim, the friction of the brake pad, and enhances the braking effect.

The invention also provides a manufacturing method for realizing the above structure, which is simple and convenient for processing the inner tube of the finished product, and the two upper sidewalls of the outer cavity as the brake have good strength, abrasion resistance and deformation after being subjected to external force. Small, with better braking effect.

The technical proposal of the invention is: an improved bicycle carbon fiber rim structure, which is integrally formed with two independent inner and outer cavities by a carbon fiber layer, and the inner cavity is a closed cavity at one end of the fixed spoke, and the outer cavity is The open cavity of the inner tube is arranged, and the two side walls of the outer cavity of the rim are parallel to each other, and the inner wall of the outer cavity is glued with a metal shell reinforcement matching the shape.

The reinforcement member is an aluminum casing.

The inner cavity fixing spoke is provided with a reinforced aluminum strip.

The metal shell reinforcement is coated with a layer of high temperature glue or high temperature resin and glued to the inner wall of the outer cavity.

The manufacturing method of the present invention is: An improved method for manufacturing a bicycle carbon fiber rim structure:

First, aluminum mandrel production: The aluminum mandrel is hollow, its cross-sectional shape and size are consistent with the outer cavity of the carbon fiber rim, the aluminum mandrel is provided with pressurized air holes, coated on the surface of the aluminum mandrel a layer of high temperature glue or high temperature resin;

Second, the outer cavity blank production: the above aluminum shell mandrel is coated with a carbon fiber layer; Third, the inner cavity blank production: the inner cavity mandrel with the cross section and the inner cavity cross-sectional shape and size is coated with the carbon fiber layer;

4. Production of rim blanks: The outer cavity blanks and the inner cavity blanks are placed up and down, and the left and right centerlines are overlapped, and then the carbon fiber layers are simultaneously coated on the two blanks to form a rim. 5. The blanks of the above-mentioned rim blanks are pressed and heated in the mold. When the carbon fiber layers are integrated into one body, they are cooled and solidified, and the semi-finished products of the rims are taken out. 6. The top slit of the rim semi-finished product is processed into a gap of the outer cavity in which the inner tube can be installed. In the preferred method:

At the time of production of the rim blank, a strong aluminum strip is attached to the outer cavity blank and then the carbon fiber layer yarn is coated. When the end of the spoke is locked in this way, the strength of the bottom wall of the rim is better, the life is longer, and the pulling of the spoke is not easily deformed.

It can be seen from the above that the beneficial effects of the present invention are: Since the inner wall of the outer cavity of the carbon fiber rim of the present invention is provided with a metal casing reinforcement matching the shape thereof, the outer casing is added by the metal casing reinforcement Rigidity, when the brake pads hold the two side walls of the rim, the two side walls are not deformed by the clamping force, and the friction force is not weakened, so that the bicycle improves the reliability of the brake; The reinforcing member increases the strength of the outer cavity body, and the two side wall bodies are clamped by the brake pad, which is less prone to crack damage and increases the service life of the rim; and the metal reinforcing member is a housing matched with the inner cavity of the outer cavity. Therefore, it still has the function of mounting the inner tube. Moreover, the aluminum mandrel is a hollow casing, which is easy to cover the carbon fiber rim layer, and the semi-finished product is easy to cut when processed. DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

1 is a schematic cross-sectional view of a conventional carbon fiber rim. 2 is a schematic view showing the cross-sectional structure of a carbon fiber rim of the present invention.

3 is a schematic cross-sectional view of a mandrel of an aluminum piece according to the present invention.

4 is a schematic cross-sectional view of a rim blank of the present invention.

detailed description

The invention provides an improved bicycle carbon fiber rim structure. As shown in FIG. 2 and FIG. 3, the carbon fiber layer integrally forms two independent inner 11 and outer 12 cavities, and the inner cavity 11 is a fixed spoke end. The outer cavity 12 is an open cavity provided with an inner tube. The upper part of the rim and the two side walls 121 constituting the outer cavity are parallel to each other, and the inner wall of the outer cavity 12 is provided with an aluminum shield matching the shape thereof. The casing reinforcement member 2; the inner cavity body 11 is provided with a reinforcing aluminum strip 3 at the spoke.

An improved bicycle carbon fiber rim structure manufacturing method:

First, the aluminum mandrel 2 is made: the aluminum mandrel 2 is a hollow ring, its cross-sectional shape and size are the same as the outer cavity 12 of the carbon fiber rim, the aluminum mandrel 2 is provided with pressurized air holes, in the aluminum The surface of the mandrel is coated with a layer of high temperature resin;

2. Production of outer cavity blank: The above-mentioned aluminum mandrel 2 is coated with a carbon fiber layer, and a gas hole is arranged outside the pressurized air hole of the aluminum mandrel;

Third, the inner cavity blank production: the inner cavity mandrel with the cross-section and the cross-sectional shape and size of the inner cavity 11 is coated with a carbon fiber layer;

4. Production of rim blanks: The above-mentioned outer cavity blanks and inner cavity blanks are placed up and down, and the left and right centerlines are overlapped, and then a strong aluminum strip 3 is attached to the outer cavity blanks. The carbon fiber layer yarn is coated with a carbon fiber layer at the same time as two blanks to form a rim blank;

5. Put the above-mentioned rim blank into the mold, pressurize it, heat it and solidify it, then cool it out, which is the semi-finished product of the rim. Since the aluminum mandrel 2 is provided with pressurized air holes, the nozzle of the air gun is pressurized. . Finally, the outer cavity 12 is machined into an open outer cavity as shown in FIG. Since the inner wall of the outer cavity 12 of the carbon fiber rim of the present invention is provided with an aluminum casing reinforcement 2 matching the shape thereof, since the aluminum casing reinforcement 2 increases the rigidity of the outer cavity, when the brake pad is clamped When the two side wall bodies 121 of the rim are held, the two side wall bodies 121 are not deformed by the clamping force, the frictional force is not weakened, thereby improving the reliability of the bicycle, and the aluminum shell reinforcement 2 The strength of the outer cavity 12 is increased, and the two side wall bodies 121 are clamped by the brake pads, which are less likely to cause crack damage and increase the service life of the rim; and because the aluminum reinforcement member 2 is matched with the inner cavity of the outer cavity. Housing, so it still has the function of installing the inner tube

The above is only the preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention and the contents of the specification should still belong to the present invention. Covered by the scope.

5

Inclusion (Rules 20.6)

Claims

Rights request

1. An improved bicycle carbon fiber rim structure, which integrally forms two independent inner and outer cavities from a carbon fiber layer, the inner cavity is a closed cavity at one end of the fixed spoke, and the outer cavity is an open cavity provided with an inner tube The body and the two side walls of the outer cavity of the rim are parallel to each other, and the inner wall of the outer cavity is glued with a metal shell reinforcement matched to the shape.

2. An improved bicycle carbon fiber rim structure according to claim 1 wherein the reinforcement member is an aluminum housing.

3. The improved bicycle carbon fiber rim structure according to claim 1, wherein: the inner cavity body is provided with a reinforced aluminum strip at the spoke.

4. An improved bicycle carbon fiber rim structure according to claim 1 or 2 or 3, wherein: the metal shell reinforcement member is coated with a layer of high temperature glue and an outer cavity. The inner wall is glued.

5. An improved bicycle carbon fiber rim structure manufacturing method, characterized in that: 1. Aluminum mandrel production: The aluminum core shaft is hollow, and its cross-sectional shape and size are different from the outer cavity of the carbon fiber rim. Consistently, the aluminum mandrel is provided with pressurized air holes, and a layer of high temperature glue or high temperature resin is coated on the surface of the aluminum mandrel;

2. Production of outer cavity blank: The outer core of the aluminum piece is coated with carbon fiber layer; the manufacture of three inner cavity blanks: outer cavity core coated carbon fiber with cross section and inner cavity shape and size Floor;

4. Production of rim blanks: The outer cavity blanks and the inner cavity blanks are placed up and down, and the left and right centerlines are overlapped, and then the carbon fiber layers are simultaneously coated on the two blanks to form a rim. Blank product 5. The above-mentioned rim blanks are placed in a mold for pressurization and heating. When the carbon fiber layers are integrated into one body, they are cooled and solidified, and the rim semi-finished products are taken out.

6. The top cut of the rim semi-finished product is processed into a gap of the outer cavity in which the inner tube can be installed.

6. The method for manufacturing an improved bicycle carbon fiber rim structure according to claim 5, wherein: when the rim blank is manufactured, a strong aluminum strip is attached to the outer cavity blank and then coated. Carbon fiber layer yarn.