KR20120028549A

KR20120028549A - Complex carbon materials comprising carbon sheet and fibers, components of bicycles comprising the same, and the bicycles using the same

Info

Publication number: KR20120028549A
Application number: KR1020100090463A
Authority: KR
Inventors: 김영철
Original assignee: 소닉스자펜 주식회사
Priority date: 2010-09-15
Filing date: 2010-09-15
Publication date: 2012-03-23
Also published as: WO2012036396A3; WO2012036396A2

Abstract

PURPOSE: A bicycle, a carbon composite material, and a part for the bicycle are provided to damp shock by physical operations or external shock. CONSTITUTION: A carbon composite material comprises a fiber material and carbon sheet films(20a,20b). The fiber material is inserted into the carbon composite material. The fiber material is wholly aromatic polyester or poly acrylate. The fiber material forms an inner layer. Carbon sheet films are respectively attached to the upper and lower ends of the fiber material. The carbon sheet film surrounds the fiber material.

Description

COMPLEX CARBON MATERIALS COMPRISING CARBON SHEET AND FIBERS, COMPONENTS OF BICYCLES COMPRISING THE SAME, AND THE BICYCLES USING THE SAME}

The present invention relates to a composite carbon material made of a carbon sheet and a fiber material, a bicycle part and a bicycle including the same, and a bicycle including the same. Large carbon composite material with high effect of distributing physical force transmitted by unbalanced mixing of external force, minimizing change of rigidity and elasticity even with temperature change, bicycle parts and copper parts applied with copper material It relates to a bicycle comprising a.

The various parts used in the bicycle should be able to attenuate the shock generated by external impact or physical operation, and the change of stiffness and elasticity is minimized even when the temperature changes, and the unbalanced blending of external force is applied. The effect of distributing the physical force transmitted to the body is required to have a large characteristic.

Conventionally, as a material of such a component, as shown in FIG. 1A, a carbon sheet and a fiber glass sheet are formed in a double layer, or in FIG. 1B, various functions are formed in a multilayer. Products applied in the form of and are widely used. However, existing materials such as those of FIGS. 1A and 1B are very weak to external shocks and have a disadvantage of being broken or partially broken when used in a moving product due to excessively strong rigidity.

In addition, the carbon wheel, which has the most problems among the conventional bicycle parts, is subjected to a lot of wind influences when driving in the configuration as shown in FIG. Particularly, as shown in Fig. 1D, which is the cut surface of Fig. 1C, and Figs. 1E (Detailed view of the rim portion) to 1f (Detailed view of the brake contact surface), the brake contact surface 2 on the carbon wheel side is used for a long time. ) At any moment generates heat between 180 and 220 degrees or more.

If this phenomenon persists for a certain period of time, high temperature is applied to the epoxy used in the carbon wheel manufacturing process. As the hardness of the epoxy decreases, the tire support groove 1 is left on the carbon wheel due to the pressure of the tire 5. The separation of the tire 5 occurs due to the phenomenon of opening to the right and to the right, respectively.

This is the departure of the tire (5) is increased as the time passes after a certain period of use rather than the initial purchase of the product. The most likely reason for this is the air pressure of the tube 6 in the tire 5 due to the wear and tear of the thickness between the tire support groove 1 and the brake contact surface 2 gradually.

In addition, in the prior art, since the multilayer structure of the carbon and the carbon layer is constituted as shown in FIG. 1F, the carbon damaged as shown in FIG. 1G due to friction between the temperature applied to the brake contact surface 2 and the brake pad 4 has a temperature. It has structural defects that can only be sensitive to.

Another problem with the prior art is that the carbon wheel shows a difference in stiffness and elasticity according to the temperature deviation, which is easily broken because the shock absorption is very high at low temperatures, and on the contrary, the stiffness and elasticity are low at high temperatures. It is caused by losing.

Vibration shock of the carbon wheel produced according to the prior art, as can be seen in Figure 1c because the spoke has a thick oval shape, the shock transmission is spread throughout the entire vibration and appear quickly.

In order to solve this problem, conventionally, a stainless steel spoke is applied to the carbon rim as shown in FIG. 1H, or a carbon spoke is applied to the aluminum rim as shown in FIG. 1I. However, when the aluminum rim is worn or damaged, repair or When it is impossible to replace the stainless steel spokes to the carbon rims, the spokes have been damaged due to the impacts on the spokes, and thus, the spoke holes have been damaged.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is that the effect of attenuating the shock generated by itself or the impact applied from the outside by physical operation is large, and rigidity and elasticity even with temperature changes In order to minimize the change of, and to provide a composite carbon material having a great effect of distributing the physical force delivered to an unbalanced combination of externally acting forces.

Another object of the present invention is to provide various parts for bicycles to which the composite carbon material is applied in whole or in part.

Still another object of the present invention is to provide a bicycle including a component to which the composite carbon material is applied in whole or in part.

The technical problem of the present invention as described above is achieved by the following means.

(1) a fiber material inserted therein; And a carbon sheet layer surrounding the fiber material.

(2) The method according to claim 1,

The fiber material is a composite carbon material, characterized in that the wholly aromatic polyester fiber or polyacrylate.

(3) The method according to claim 1,

The fiber material comprises an inner layer, the composite carbon material, characterized in that the planar composite carbon sheet attached to the carbon sheet layer on the top and bottom of the fiber material, respectively.

(4) The method according to 1,

The fiber material is a composite carbon material, characterized in that the plurality of fiber yarns are contained therein, the circular composite carbon string wrapped around the carbon sheet layer is rotated around.

(5) The method according to 4,

Composite fiber material, characterized in that the plurality of fiber yarns are twisted.

(6) The method according to 1,

A fiber composite constitutes an inner layer, and a planar composite carbon sheet having a carbon sheet layer attached to upper and lower ends of the fibrous material, respectively; And

A composite carbon material comprising a plurality of fiber yarns inside, a circular composite carbon string wrapped around the carbon sheet layer is rotated around.

(7) Bicycle parts manufactured using the composite carbon material according to any one of paragraphs 1 to 6.

(8) The bicycle part according to claim 7, wherein the composite carbon material is applied in whole or in part as a material of a bicycle frame, a handle bar, a saddle, a seat post, a stamp, or a wheel.

(9) A bicycle comprising a bicycle component according to (7).

According to the present invention, the effect of attenuating the shock generated by itself from the external impact or physical operation is great, the change in rigidity and elasticity is minimized even when the temperature changes, and is transmitted to an unbalanced combination of externally acting forces. It provides composite carbon material with great effect of distributing physical force.

1A to 1I are diagrams illustrating components of bicycles according to the prior art.
2a and 2b is a block diagram of a composite carbon material according to the present invention.
3 is a block diagram of a bicycle frame to which a composite carbon material according to the present invention is applied.
Figure 4 is a block diagram of a bicycle handlebar applied composite carbon material according to the present invention.
5 is a block diagram of a bicycle saddle to which a composite carbon material according to the present invention is applied.
6 is a block diagram of a bicycle seat post to which the composite carbon material according to the present invention is applied.
7 is a block diagram of a bicycle stamp to which the composite carbon material according to the present invention is applied.
8a to 8d is a block diagram of a wheel to which a composite carbon material according to the present invention is applied.

The present invention is a fiber material inserted therein; And it provides a composite carbon material comprising a carbon sheet layer surrounding the fiber material.

Hereinafter, the content of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a is a configuration of the composite carbon material according to the first embodiment of the present invention, the composite carbon material shown in Figure 2a is composed of a fiber material of the inner layer 10, the carbon sheet on the top and bottom of the fiber material, respectively It is characterized by a planar composite carbon sheet having layers 20a and 20b attached thereto. Preferably the fiber material is a wholly aromatic polyester fiber or polyacrylate as a special fiber.

Figure 2b is a configuration of a composite carbon material according to a second embodiment of the present invention, the composite carbon material shown in Figure 2b is a fiber material includes a plurality of fiber yarns 30 therein, the carbon around The sheet layer 40 is characterized by a circular composite carbon string surrounding the rotation. Preferably the fiber material is a wholly aromatic polyester fiber or polyacrylate as a special fiber. In addition, the fiber yarn 30 may take a configuration in which a plurality of twisted yarns are twisted.

In addition, the composite carbon material in the present invention, the fiber material constitutes the inner layer, the planar composite carbon sheet having a carbon sheet layer attached to the top and bottom of the fiber material, respectively; And a plurality of fibrous yarns included therein, and a circular composite carbon string wrapped around the carbon sheet layer while the carbon sheet layer is rotated around is preferably applied. In addition, of course, the carbon composite sheet may be applied together with the flat composite carbon sheet and the circular composite carbon string.

Such a composite form may be formed by inserting a circular composite carbon string between layers of a flat composite carbon sheet, or laminating a circular composite carbon sheet between a circular composite carbon string and a string, and alternately moving up and down a circular composite carbon sheet. It is not particularly limited to the application form, such as the form in which the line is wrapped around the planar composite carbon sheet, it is possible to attach them using an adhesive such as epoxy or other special attachment forms such as screws, rivets, etc. There is no special restriction on this.

The composite carbon material according to the present invention having the above-described configuration should have a small width of change in impact resistance, stiffness and elasticity due to temperature change, and can be applied as a material of various parts that need to distribute physical force at the same time.

Examples of the parts are preferably bicycle parts, and specifically, the composite carbon material may be applied in whole or in part as a material of a bicycle frame, a handle bar, a saddle, a seat post, a stamp, or a wheel.

Hereinafter, the present invention will be described in detail with reference to more specific application examples.

Example 1 Planar Composite Carbon Sheet

As shown in FIG. 2a, a polyacrylate fiber was inserted between the carbon sheet and the carbon sheet layer to prepare a planar composite carbon sheet. In this case, the thickness, length, width, angle, dosage of epoxy, degree of cutting, etc. may be appropriately selected according to the needs of the user according to the type of carbon used in the preparation of the planar composite carbon sheet.

The flat composite carbon sheet prepared according to Example 1 and the carbon sheet prepared according to the prior art were tested using a jig, as shown in Table 1 below.

Comparison Prior Art (Carbon Sheet Layer) Plane Composite Carbon Sheet Layer 01. Thickness 1.0mm 1.0mm 02. Size 300mm X 200mm 300mm X 200mm 03. Warping Broken at 22 degrees Broken at 35 degrees 04. Strength 506.11 (kgf) 461.71 (kgf) 05. Instant Shock 100 / Kg (25 Degrees / Base) Cracking No crack 06. Continuous Shock 50 / Kg (25 Degrees / Base) 1200 times (after crack) 2400 times (after crack) 07. Weight 75 / g 72 / g 08. Image 30 degrees / Instantaneous shock 100 / Kg Cracking No crack 09. minus 25 degrees / instantaneous shock 100 / Kg Cracking and cutting No crack 10. Video 30 Degree / Continuous Shock 50 / Kg 1450 times (after crack) 2550 times (after crack) 11.minus 25 degrees / continuous shock 50 / Kg 970 breaks 1550 (after crack)

According to the experimental results, it can be seen that the planar composite carbon sheet layer according to the present invention is remarkably excellent in various properties.

Example 2 Circular Composite Carbon Cord

After twisting the polyacrylate fiber in several layers like yarn, the carbon sheet was rolled up while maintaining a constant distance at a 30 degree or 45 degree angle around the polyacrylate fiber to prepare a circular composite carbon cord as shown in FIG. 2b.

The circular composite carbon string as described above is made of a carbon sheet, but can also be substituted with a unicarbon sheet (Unidirectional Sheet), and also according to the type of carbon used in the production of the circular composite carbon string, the thickness, length, width, The angle, dosage of epoxy, degree of cleavage, etc. may be appropriately selected according to the needs of the user.

Experimental results of the circular composite carbon cord prepared by Example 2 and the product of rolling a carbon sheet prepared according to the prior art using a jig as shown in Table 2 below.

Comparison Prior art (carbon file) Round compound carbon file 01. Thickness 5 ø 5 ø 02. Length 300 mm 300 mm 03. Warping Broken at 19 degrees Broken at 32 degrees 04. Strength 506.11 (kgf) 461.71 (kgf) 05. Instant Shock 100 / Kg (25 Degrees / Base) Broken and cracked No crack 06. Continuous Shock 50 / Kg (25 Degrees / Base) 1530 (since broken) 2800 (after broken) 07. Weight 28 / g 27 / g 08. Image 30 degrees / Instantaneous shock 100 / Kg Broken and cracked No crack 09. minus 25 degrees / instantaneous shock 100 / Kg cut No crack 10. Video 30 Degree / Continuous Shock 50 / Kg 1650 (broken after) 2850 times (broken after) 11.minus 25 degrees / continuous shock 50 / Kg 1020 times (broken after) 2750 times (broken after)

According to the experimental results, it can be seen that the circular composite carbon string according to the present invention is remarkably excellent in various properties.

According to the experimental results of the present invention, the composite carbon sheet and the circular composite carbon string according to the present invention, which combines the carbon sheet and the special fiber, were superior to the existing carbon sheet itself, and were excellent in high strength, high elasticity, shock absorption, and heat transfer. .

Application Example 1 Bicycle Frame

The seat-post tubing, top tubing, and seat stay tubing of the bicycle frame as shown in FIG. 3 using the circular composite carbon line and the flat composite carbon sheet manufactured by the above embodiment. The result of applying each material in the ratio as shown in Table 3 for the parts where the physical force of tubing, Headset Tubing, Bottom Bracket Tubing, and Down Tubing is most applied Compared with the carbon sheet and fiberglass sheet according to the prior art, there is no driving, safety and fatigue. It was able to control the elasticity, and the circular composite carbon cord had a very high effect of distributing the physical force.

Used part Flat Composite Carbon Sheet Round compound carbon file Carbon sheet 3-1 30% 30% 40% 3-2 20% 20% 60% 3-1 15% 15% 70%

On the other hand, as in the prior art, the higher the addition ratio of fiberglass, the higher the fatigue feeling was confirmed. This is because the frame according to the prior art is so strong that it absorbs various shocks received from the ground as it is.

[Application Example 2] Bicycle Handlebar

The circular composite carbon sheet and the flat composite carbon sheet prepared according to the above embodiment were partially applied to both sides of the handlebar center in a form of a wire as shown in FIG. 4 (4-1: flat composite carbon sheet and a circular shape). Composite carbon cord composite, 4-2: handlebar center point carbon, 4-3: handlebars on both sides). At this time, it was applied in the ratio of 20% by weight of the circular composite carbon line on the inner surface, 30% by weight of the flat composite carbon sheet and 50% by weight of the carbon sheet on the inner surface mainly on the part of the stem most connected to the left and right. As a result, in the vertical vibration test of the handlebars, the original shape was maintained even after 5,500 vibrations, far exceeding 3,000 to 3,500 times compared to the general handlebar according to the prior art.

[Application Example 3] bicycle saddle

Bicycle saddle was manufactured in the same configuration as in FIG. 5 using the circular composite carbon file and the flat composite carbon sheet prepared according to the above embodiment (5-1: carbon sheet, 5-2: flat composite carbon sheet and circular composite) Where carbon string is synthesized, 5-3: carbon sheet). At this time, the V-shape was applied to the center of the saddle at the ratio of 30% by weight of circular composite carbon string, 50% by weight of flat composite carbon sheet, and 20% by weight of carbon sheet to reduce the impact of the saddle. Could get rid of.

Application Example 4 Bicycle Seat Post

The sheet post was manufactured in the same configuration as in FIG. 6 using the circular composite carbon strip and the flat composite carbon sheet prepared according to the above embodiment (6-1: part of a composite composite carbon sheet and a circular composite carbon strip, 6-2: carbon sheet). In this case, 20% by weight of a circular composite carbon file, 20% by weight of a flat composite carbon sheet, and 60% by weight of a carbon sheet are applied to the part that receives the most physical force in the seat post part. The angle of bending of the seatpost was obtained in a curved form rather than a right angle form, and no abnormality was found even in the vibration test more than 4,800 times. For reference, the general seat post according to the prior art is based on 3,000 times.

[Application Example 5] Bicycle Stamp

Using a circular composite carbon sheet and a flat composite carbon sheet prepared according to the above embodiment, a stamp was manufactured in the same configuration as in FIG. 7 (7-1: part of a composite composite carbon sheet and a circular composite carbon sheet, 2 : Carbon sheet, 7-3: A composite composite flat carbon sheet and a circular composite carbon string). At this time, 20 wt% of circular composite carbon files, 40 wt% of flat composite carbon sheets, and 40 wt% of carbon sheets were applied to the part that receives the most physical force in the seat post part, and thus the physical force distribution. As a result of the shock attenuation, there was no abnormality even more than 4,000 times in the vibration test without bending the stem. For reference, the stamp according to the prior art is based on 3,000 times.

Application Example 6 Bicycle Wheel

Using the circular composite carbon file and the flat composite carbon sheet prepared by the above embodiment, as shown in Figure 8a to manufacture the wheel having the most problems. As shown in FIG. 8B, the brake contact surface is manufactured in a honeycomb structure in which the planar composite carbon sheet 100 and the circular composite carbon string 200 are formed in layers and layers in the prior art, at 180-220 degrees. It was confirmed that the change in shape was not observed at any temperature above, and it had a stable brake contact surface without peeling off the carbon sheet due to wear.

In the brake contact surface manufactured as described above, the temperature generated by the friction with the brake pads could be effectively dispersed through the polyacrylate fiber contained in the flat composite carbon sheet 100 and the circular composite carbon string 200. As the heat is transferred to the furnace, the shocks and external shocks generated by physical operation are also attenuated by these fibers. In particular, the impact attenuation phenomenon is that the polyacrylate fiber absorbs the shock delivered to the carbon sheet at a high speed, and the heat generated at the brake contact surface generated from the carbon sheet is very slow in the heat transfer rate of the carbon sheet, thereby increasing the temperature at the brake contact surface. Similarly, it is judged that the polyacrylate fibers are absorbed and dispersed.

In this application example, the carbon wheel is removed using the flat composite carbon sheet 100 and the circular composite carbon string 200 as shown in FIG. The thickness and shape of the spokes were slightly angled between the carbon rim and the drive center spokes so that the left and right spokes had different thicknesses and shapes. As a result, it was possible to eliminate the influence of the wind, it was confirmed that the running and rotation is very improved.

In addition, as another application of the present invention, the left spoke and the right spoke have different thicknesses and shapes by using the flat composite carbon sheet 100 and the circular composite carbon string 200 as shown in FIG. Instead, it was fixed between the carbon spokes and the aluminum rim using bolts or rivets, and then the high-strength epoxy was used to fix the aluminum rims without damaging the carbon spokes. As a result, there was no wind effect and the wheels with driving and straightness could be suppressed.

In addition, as another application example of the present invention, as shown in Figure 8d using a flat composite carbon sheet 100 and a circular composite carbon string 200 to form a carbon rim, it is possible to maintain the safety of the carbon rim and titanium spokes A guard was prepared in which the guard was mounted inside the carbon rim between the carbon rim and the titanium spokes. As a result, a safe configuration of the brake contact surface was possible, as well as a wheel without the influence of wind, and excellent in running and straightness.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It can be understood that

10,30: special fiber
20a, 20b, 40: carbon sheet
100: flat composite carbon sheet
200: round compound carbon

Claims

A fiber material inserted therein; And a carbon sheet layer surrounding the fiber material.

The method of claim 1,
The fiber material is a composite carbon material, characterized in that the wholly aromatic polyester fiber or polyacrylate

The method of claim 1,
The fiber material comprises an inner layer, the composite carbon material, characterized in that the planar composite carbon sheet attached to the carbon sheet layer on the top and bottom of the fiber material, respectively.

The method of claim 1,
The fiber material is a composite carbon material, characterized in that the plurality of fiber yarns are contained therein, the circular composite carbon string wrapped around the carbon sheet layer is rotated around.

The method of claim 4, wherein
Composite fiber material, characterized in that the plurality of fiber yarns are twisted.

The method of claim 1,
A fiber composite constitutes an inner layer, and a flat composite carbon sheet having a carbon sheet layer attached to upper and lower ends of the fibrous material, respectively; And
A composite carbon material comprising a plurality of fiber yarns inside, a circular composite carbon string wrapped around the carbon sheet layer is rotated around.

Bicycle parts manufactured using the composite carbon material according to any one of claims 1 to 6.

The bicycle part according to claim 7, wherein the composite carbon material is applied in whole or in part as a material of a bicycle frame, a handle bar, a saddle, a seat post, a stamp, or a wheel.

Bicycle comprising a bicycle component according to claim 7.