TWI569988B - Manufacturing process of lightening bicycle wheel rim and structure of wheel rim - Google Patents

Description

Bicycle wheel lightweight process and its rim structure

The invention relates to a bicycle rim lightweight manufacturing process and a rim structure thereof, in particular to a lightweighting requirement and capable of maintaining the necessary structural strength without damaging the overall aesthetic image, and in its overall application. The bicycle wheel rim lightweight process and its rim structure, which are more practical and effective, are the inventors of its innovative application.

According to the bicycle system, it is an extremely convenient means of transportation. It uses the strength of the feet to step on it and advances. It not only has the effect of fitness, but also is an excellent tool for leisure sports, and because it does not require additional fuel. So that it can save energy costs, have environmental protection effects, plus the bicycle is slower and safer to use.

As with the above bicycles, in addition to being a basic means of transportation, it also has a combination of leisure and sports functions. Coupled with the improvement of research and development capabilities and the advancement of technology, bicycle appearance, riding comfort, body strength, weight, speed, etc. have become the focus of development; especially for bicycles used in professional competitive competitions, riding comfort, body Strength, weight and speed are definitely the goals that the driver pursues. In order to move the bicycle toward a lightweight structure, in recent years, a rim made of carbon fiber has been developed to replace the conventional metal rim, thereby effectively reducing the overall weight of the bicycle.

The traditional carbon fiber rim forming technology is to first set up an annular capsular bag, and inflate the inside of the capsular bag to bulge the sac, and then affix the multi-layer carbon fiber cloth on the outer surface of the capsular bag, wherein the carbon fiber cloth material The number of layers to be applied is changed according to the structural strength required by the rim. Usually, the surface provided for the spokes requires a high structural strength, so the number of layers of the carbon fiber cloth to be attached is about 7 layers, while the rims are other. The structural strength requirement of the part is slightly lower, so the number of layers of the attached carbon fiber cloth is about 5 layers; however, since the conventional carbon fiber rim must be sequentially applied through the layers of the carbon fiber cloth, the construction is carried out. It takes a lot of time and labor; in addition, it must pay attention to whether there is residual air between the adjacent upper and lower carbon fiber cloths. If the residual air will make the adjacent upper and lower carbon fiber cloths not completely flattened, Producing locally prominent products, so the traditional production method can not effectively reduce the defect rate of carbon fiber rims; and the price of carbon fiber cloth itself is high, and the material cost required to cover multiple layers is relatively high. Plus; but these reasons are important factors in carbon fiber rims price is not close to the people's cause.

Because of the above-mentioned deficiencies in the production process of the conventional carbon fiber rim, the inventors have previously developed a method for manufacturing a carbon fiber rim according to the above-mentioned problem. The steps include:

A. A strip of metal formed by heating a metal substrate to a moldable temperature and then extruding to obtain a strip of a desired shape, the strip comprising two side walls, one connected to the opposite end faces of the side walls a connecting wall and an inner ring wall connected between the radially inner edges of the side walls, so that a space is enclosed between the two side walls, the connecting wall and the inner ring wall;

B. joining the two ends of the strip body, the two ends of the formed strip body are joined into a circle shape to form a wheel frame skeleton body body;

C. Milling the through hole and the spoke joint hole, and milling a plurality of through holes and a plurality of spoke joint holes on the frame body of the wheel frame to form a wheel frame skeleton; and the spoke joint holes are milled and formed on the inner ring wall Each of the spoke-bonding holes is not disposed corresponding to any of the through-holes, and is located on the inner ring wall between the two of the through-holes, and each of the spoke-bonding holes is provided with a spoke joint Piece

D. Surface roughening treatment is performed to surface roughen the wheel frame skeleton of the through hole and the spoke joint hole to increase the surface roughness of the wheel frame skeleton;

E, covering the carbon fiber cloth material, cutting the carbon fiber cloth material into a preset shape, and then covering the surface of the wheel frame skeleton, and covering the through hole at the same time;

F. heating and setting, placing the wheel frame skeleton whose surface has been covered with the carbon fiber cloth material in a mold, and heating and shaping to form a carbon fiber layer on the surface of the wheel frame skeleton, and thereby forming a carbon fiber wheel Semi-finished product;

G. Surface treatment, which is to finish surface treatment of the carbon fiber rim semi-finished product with the surface coated with the carbon fiber cloth material to obtain a bicycle carbon fiber rim finished product.

However, the carbon fiber rim obtained by the above-mentioned production has good structural strength and low process cost, but the adhesion of the carbon fiber cloth is poor due to the large through-hole area; now, the inventor has been in the related industry for many years. Rich in design and development and practical production experience, we will provide a bicycle rim lightweight process and its rim structure, in order to achieve better practical value.

The main object of the present invention is to provide a bicycle rim lightweight manufacturing process and a rim structure thereof, in particular to a lightweighting requirement, and to maintain the necessary structural strength without destroying the overall aesthetic image, but in its entirety The bicycle rim lightweight process and its rim structure are used for the purpose of using more practical and effective characteristics.

The main purpose and effect of the bicycle wheel rim lightweighting process of the present invention are achieved by the following specific technical means, and the steps are as follows:

S1) The wheel frame skeleton is provided with a wheel frame skeleton including an inner frame portion, a covering portion and a supporting portion between the inner frame portion and the covering portion, and a plurality of spoke connecting holes are arranged in the inner frame portion of the wheel frame And a nozzle hole penetrating the inner frame portion and the support portion;

S2) Milling through hole machining - Milling a plurality of through holes in the inner frame portion and the support portion end face of the wheel frame, and evenly distributing the plurality of through holes in the inner frame portion and the support portion, the through hole area occupying the inner frame portion The total area of the support portion is 35% to 85%%, and the processing process keeps the distance between two adjacent through holes maintained at 0.5 to 1.5 mm;

S3) surface roughening treatment - performing surface roughening treatment on the wheel frame skeleton of the finished through hole to increase the surface roughness of the wheel frame skeleton;

S4) coating the carbon fiber cloth material-cutting the carbon fiber cloth material into a preset shape, then covering the surface of the wheel frame skeleton, and covering the through hole at the same time;

S5) heat setting - placing the wheel frame skeleton whose surface has been coated with the carbon fiber cloth material in a mold, and heat setting to form a carbon fiber layer on the surface of the wheel frame skeleton;

S6) Surface treatment - The surface of the rim on which the carbon fiber layer is formed is surface-treated to produce a bicycle lightweight rim finished product.

A preferred embodiment of the bicycle rim lightweighting process as described above, wherein the wheel frame skeleton is one of an aluminum alloy or a magnesium alloy.

A preferred embodiment of the bicycle rim lightweighting process as described above, wherein the surface treatment comprises a surface polishing process and a spray coating process on the rim forming the carbon fiber layer.

A preferred embodiment of the bicycle rim lightweighting process as described above, wherein the carbon fiber cloth material is coated on the wheel frame skeleton by a layer of 1 to 2 layers, and the laminated carbon fiber cloth material is coated The texture is a staggered stack.

The main purpose and effect of the bicycle lightweight rim structure of the present invention are achieved by the following specific technical means:

The rim structure is obtained by the above process, and comprises: a wheel frame skeleton and a carbon fiber layer covering the surface of the wheel frame skeleton; wherein the wheel frame skeleton comprises an inner frame portion combined with the spokes, corresponding a covering portion of the tire and a supporting portion between the inner frame portion and the covering portion are disposed, and the inner frame portion of the wheel frame skeleton and the end surface of the supporting portion are evenly distributed with a plurality of through holes, and the through hole area occupies about the inner frame portion And a total area of the support portion is 35% to 85%, and a gap of 0.5 to 1.5 mm is formed between the two adjacent through holes, and the carbon fiber layer is coated on the outer surface of the wheel frame skeleton, and covers the through hole together; Thereby, the bicycle rim can be lightened and the carbon fiber layer can be firmly attached to the wheel frame, thereby achieving the effect of improving the structural strength of the rim.

It can be seen from the above components and implementation description that the present invention has the following advantages as compared with the prior art:

1. The wheel frame skeleton of the present invention is evenly distributed through the through holes and arranged at the end faces of the inner frame portion and the support portion, so that there is a gap between the through holes and the through holes for the carbon fiber layer to be combined, and the carbon fiber layer adhesion area can be increased to allow the carbon fiber layer to be Can flatten the effect of the service.

2. The wheel frame skeleton of the present invention can reduce the weight of the wheel frame skeleton to the lightest by the milling of the through holes, and the carbon fiber layer can be formed on the surface of the wheel frame skeleton to improve the finished wheel product. The structural strength makes the carbon fiber rim have the advantages of light weight and good structural strength.

3. The lightweight rim of the present invention first uses a metal material as the wheel frame skeleton, and then attaches the carbon fiber cloth material to the surface of the wheel frame skeleton, thereby greatly reducing the number of layers of the carbon fiber cloth material and reducing the carbon fiber cloth material. The amount of use is reduced to reduce the cost of manufacturing.

4. The lightweight rim of the present invention can greatly reduce the number of layers of carbon fiber cloth attached, and can also achieve stable adhesion, so that the man-hours and processes required for production can be shortened, and the production process is accelerated. Increase productivity and product yield.

For a more complete and clear disclosure of the technical content, the purpose of the invention and the effects thereof achieved by the present invention, it is explained in detail below, and please refer to the drawings and drawings:

First, the practical application techniques and means of the present invention, as shown in the first to sixth figures, are schematic diagrams of the flow process of the bicycle wheel rim lightweight process block, the steps of which are as follows:

S1) The wheel frame skeleton is provided with an inner frame portion (11) including a spoke, a covering portion (12) corresponding to the tire, and a space between the inner frame portion (11) and the covering portion (12) a wheel frame skeleton (1) of the support portion (13), and a plurality of spoke coupling holes (14) and a penetrating inner frame portion (11) and the support portion (13) are disposed in the inner frame portion (11) of the wheel frame Air nozzle hole (15);

S2) Milling through hole machining - the inner frame portion (11) and the support portion (13) face milling machine are machined with a plurality of through holes (16), and the plurality of through holes (16) are evenly distributed. The inner frame portion (11) and the support portion (13) have an area of about 35% to 85% of the total area of the inner frame portion (11) and the support portion (13), and the processing process makes the two adjacent portions The spacing of the holes (16) is maintained at 0.5 to 1.5 mm;

S3) Surface Rough Treatment - The surface frame roughening of the wheel frame skeleton (1) for completing the milling through hole (16) is performed to increase the surface roughness of the wheel frame skeleton (1). However, this step mainly increases the roughness of the surface of the wheel frame skeleton (1) to produce a good bonding effect with the carbon fiber cloth (21);

S4) coating the carbon fiber cloth material - cutting the carbon fiber cloth material (21) into a predetermined shape, and leaving the spoke coupling hole (14) and the hole (211) of the nozzle hole (15), And then covering the surface of the wheel frame skeleton (1), and covering the through hole (16) at the same time, further the carbon fiber cloth (21) is coated on the wheel frame skeleton (1) The number of layers is 1-2 layers, and the lines of the laminated carbon fiber cloth (21) are staggered;

S5) Heat setting - placing the wheel frame skeleton (1) having the surface covered with the carbon fiber cloth (21) in a mold and heat setting to form a surface on the wheel frame skeleton (1) Carbon fiber layer (2);

S6) Surface treatment - the surface of the surface of the carbon fiber layer (2) is subjected to a surface polishing process and a surface treatment of a spray coating process to obtain a bicycle lightweight rim finished product.

In the embodiment of the bicycle rim lightweighting process of the present invention, the wheel frame skeleton (1) is one of an aluminum alloy or a magnesium alloy. Among them, magnesium alloy is the lightest metal, has high strength and high rigidity, and is a highly active metal, which is easily oxidized, so it cannot be exposed to the atmosphere for a long time, and the carbon fiber cloth (21) is coated on the surface to form it. The carbon fiber layer (2) prevents the oxidation of the magnesium alloy and increases the durability of the product.

For the lightweight rim structure made by the bicycle rim lightweight manufacturing process of the present invention described above, please refer to the fifth to sixth figures, which include:

The frame frame (1) includes an inner frame portion (11) combined with the spokes, a covering portion (12) corresponding to the assembled tire, and a portion between the inner frame portion (11) and the covering portion (12). a supporting portion (13), wherein the inner frame portion (11) of the wheel frame is provided with a plurality of spoke coupling holes (14) and a nozzle hole (15) penetrating the inner frame portion (11) and the supporting portion (13), The inner frame portion (11) and the end surface of the support portion (13) of the wheel frame frame (1) are evenly distributed with a plurality of holes (16) occupying an inner frame portion (11) and a support portion (the inner frame portion (11) and the support portion ( 13) a total area of 35% to 85%, and a gap of 0.5 to 1.5 mm formed between two adjacent through holes (16);

a carbon fiber layer (2) covering the surface of the wheel frame skeleton (1) is coated on the surface of the wheel frame skeleton (1) with at least one layer of carbon fiber cloth (21), and is coated on the carbon fiber cloth (21) A hole (211) is provided corresponding to the spoke coupling hole (14) and the nozzle hole (15), and the carbon fiber cloth (21) covers the through hole (16).

However, the above-described embodiments or drawings are not intended to limit the structure or the use of the present invention, and any suitable variations or modifications of the invention will be apparent to those skilled in the art.

It can be seen from the above components and implementation description that the present invention has the following advantages as compared with the prior art:

1. The wheel frame skeleton of the present invention is evenly distributed through the through holes and arranged at the end faces of the inner frame portion and the support portion, so that there is a gap between the through holes and the through holes for the carbon fiber layer to be combined, and the carbon fiber layer adhesion area can be increased to allow the carbon fiber layer to be Can flatten the effect of the service.

2. The wheel frame skeleton of the present invention can reduce the weight of the wheel frame skeleton to the lightest by the milling of the through holes, and the carbon fiber layer can be formed on the surface of the wheel frame skeleton to improve the finished wheel product. The structural strength makes the carbon fiber rim have the advantages of light weight and good structural strength.

3. The lightweight rim of the present invention first uses a metal material as the wheel frame skeleton, and then attaches the carbon fiber cloth material to the surface of the wheel frame skeleton, thereby greatly reducing the number of layers of the carbon fiber cloth material and reducing the carbon fiber cloth material. The amount of use is reduced to reduce the cost of manufacturing.

4. The lightweight rim of the present invention can greatly reduce the number of layers of carbon fiber cloth attached, and can also achieve stable adhesion, so that the man-hours and processes required for production can be shortened, and the production process is accelerated. Increase productivity and product yield.

In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please forgive the review, and grant the patent, it is really sensible.

(1) ‧ ‧ wheel frame skeleton

(11) ‧‧‧Inside frame

(12) ‧‧‧Covering Department

(13) ‧ ‧ support

(14) ‧‧‧ spoke bonding holes

(15) ‧‧‧ vents

(16)‧‧‧Tongkong

(2) ‧‧‧carbon fiber layer

(21)‧‧‧Carbon fiber cloth

(211)‧‧‧ holes

(S1) ‧ ‧ wheel frame skeleton

(S2)‧‧‧ Milling through hole machining

(S3) ‧‧‧Surface roughening

(S4) ‧ ‧ covered carbon fiber cloth

(S5) ‧‧‧Heating stereotypes

(S6) ‧‧‧Surface treatment

First: Schematic diagram of the block flow of the process of the present invention

Second figure: schematic view of the appearance of the wheel frame skeleton of the present invention

The third figure: the appearance of the wheel frame skeleton milling through hole of the present invention

Fourth: Schematic diagram of the appearance of the wheel frame skeleton covered carbon fiber cloth of the present invention

Figure 5: Appearance of the lightweight rim of the present invention

Figure 6 is a schematic cross-sectional view of the lightweight rim of the present invention

(S1) ‧ ‧ wheel frame skeleton

(S2)‧‧‧ Milling through hole machining

(S3) ‧‧‧Surface roughening

(S4) ‧ ‧ covered carbon fiber cloth

(S5) ‧‧‧Heating stereotypes

(S6) ‧‧‧Surface treatment

Claims (8)

The bicycle rim lightweight manufacturing process has the following steps: S1) The wheel frame skeleton is provided with a wheel frame skeleton including an inner frame portion, a covering portion and a supporting portion between the inner frame portion and the covering portion, and The inner frame ring of the wheel frame is provided with a plurality of spoke joint holes and a nozzle hole penetrating the inner frame portion and the support portion; S2) milling through hole processing - the inner frame portion of the wheel frame and the end face of the support portion are milled to produce a majority The through hole is evenly distributed in the inner frame portion and the support portion, and the through hole area accounts for about 35% to 85% of the total area of the inner frame portion and the support portion, and the processing process keeps the spacing between the two adjacent through holes 0.5~1.5mm; S3) Surface roughening treatment--surface roughening treatment of the wheel frame skeleton of the finished through-hole to increase the surface roughness of the wheel frame skeleton; S4) covering the carbon fiber cloth material-will After the carbon fiber cloth material is cut into a preset shape, it is coated on the surface of the wheel frame skeleton, and the covering layer covers the through hole at the same time; S5) heat setting - the surface has been covered with the carbon fiber cloth The wheel frame skeleton of the material is placed in a mold, And heating and shaping to form a carbon fiber layer on the surface of the wheel frame skeleton; S6) Surface treatment - the surface of the rim of the carbon fiber layer is surface-treated to obtain a bicycle lightweight rim finished product. The bicycle rim lightweighting process of claim 1, wherein the wheel frame skeleton is one of an aluminum alloy or a magnesium alloy. The bicycle rim lightweighting process of claim 1 or 2, wherein the surface treatment comprises a surface polishing process and a spray coating process on the rim forming the carbon fiber layer. The bicycle rim lightweighting process according to claim 1 or 2, wherein the number of layers of the carbon fiber cloth covering the wheel frame skeleton is 1-2 layers. The bicycle rim lightweighting process of claim 4, wherein the texture of the laminated carbon fiber cloth is a staggered stack. The bicycle rim lightweighting process according to claim 3, wherein the carbon fiber cloth material is layered on the wheel frame skeleton by 1 to 2 layers. The bicycle rim lightweighting process of claim 6, wherein the texture of the superposed carbon fiber cloth is a staggered stack. A bicycle lightweight rim structure comprising the process of any one of claims 1 to 7; comprising: a wheel frame skeleton comprising an inner frame portion combined with the spokes, and a corresponding assembly a covering portion of the tire and a supporting portion between the inner frame portion and the covering portion, and the inner frame portion of the wheel frame is provided with a plurality of spoke coupling holes and a nozzle hole penetrating the inner frame portion and the supporting portion, and The inner frame portion of the wheel frame skeleton and the end surface of the support portion are evenly distributed with a plurality of through holes, the through hole area occupies about 35% to 85% of the total area of the inner frame portion and the support portion, and 0.5 to 1.5 are formed between the two adjacent through holes. Mmm pitch; a carbon fiber layer covering the surface of the wheel frame skeleton, which is coated with at least one layer of carbon fiber cloth on the surface of the wheel frame skeleton, and holes are formed in the carbon fiber cloth corresponding to the spoke joint hole and the nozzle hole The carbon fiber cloth covers the through hole.