JP2012086820A - Wheel for two-wheel vehicle having honeycomb structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shape and a structure which have a necessary and sufficient strength for a wheel for a two-wheel vehicle, are made from lightweight material, and are small in volume.SOLUTION: A spoke assembly shape when viewing a wheel from a lateral direction is formed into a honeycomb structure in which three regular hexagons are radially formed from a central hub, and the regular hexagons are combined toward a rim. The positional relationship between the front surface and the back surface is displaced at 60°. The material of a spoke is made of a carbon fiber molded and covered with a resin, the carbon fiber is formed into an interweaved string-like form, the cross-sectional surface of the spoke after resin molding work is formed into a round, elliptical or ship-like shape. In the method of manufacturing this wheel for a two-wheel vehicle, two of the interweaved carbon strings are twisted and used as one side of the regular hexagon, and the two carbon strings are separated one by one at each branch point of the regular hexagon, and each twisted with one separated from two adjacent sides. Thereby, the respective sides of all the regular hexagons forming the honeycomb structure become a continuum of the carbon strings connected by the twisting.

Description

  The present invention relates to a wheel for a motorcycle.

  Two-wheeled vehicles, especially bicycle wheels, come in various forms of spoke assembly. A normal tangent set as shown in Patent Document 1 and a front wheel that is not subjected to a rotational load may be given priority to weight reduction by simply providing spokes radially. As shown in FIG. 1 of Patent Document 2, a method of integrally forming a hub, spokes, and rims has been partially put into practical use. As an example of irregularly assembling spokes, as shown in FIGS. 1 and 2 of Patent Document 3 and FIG. 1 of Patent Document 4, the spokes connected to the hub are bent or deformed while being connected to the rim. It may be designed for the purpose of shock absorption.

Japanese Patent No. 3578118 Real fair 06-006962 ACT 04-037001 Real fairness 07-04201

  Since the wheel receives the total weight of the two-wheeled vehicle and the weight of the driver with the front and rear wheels, a large load is applied particularly to the spokes. Since damage to the wheel leads to a serious accident while driving, we want to ensure sufficient strength.

  On the other hand, reducing the weight of the wheel has the effect of increasing the running speed. In particular, bicycles that are powered by human power greatly benefit from the weight reduction. If the necessary and sufficient strength can be obtained, a shape and structure using a light material and having as little volume as possible are desirable.

  The spoke assembly when the wheel is viewed from the lateral direction has a honeycomb structure in which three regular hexagons are radially formed from the central hub, and the regular hexagons are combined toward the rim. Further, the positional relationship was displaced 60 degrees between the front surface and the back surface.

  The spoke material is made of carbon fiber coated and molded with a resin, and the carbon fiber is a knitted yarn shape. The cross-section of the spoke after the resin molding process is circular, elliptical, or ship-shaped. Two knitted carbon yarns are twisted together to form one side of a regular hexagon, and at the branch point of the regular hexagon, the two carbon yarns are separated one by one and twisted one by one separated from two adjacent sides. It was set as the manufacturing method of combining. As a result, a carbon fiber continuum was formed in which each side of all regular hexagons forming the honeycomb structure was bonded not by adhesion but by twisting.

  When the wheel is viewed from the vertical direction, the spoke connecting the hub and the rim is not a straight line but an arch shape curved outward. In addition, a line connecting two sides of the six regular hexagonal rims on both the front and back surfaces formed radially from the central hub is a top rim of the inner periphery of the rim, and a deep rim structure is formed in which spokes are connected to this.

  High strength carbon fibers can be used as yarns, twisted to form a continuous bonded body, and this has an arch-type honeycomb structure that is an assembly of regular hexagons, thereby ensuring high strength. Furthermore, by changing the assembly position of the spokes by 60 degrees on the front and back sides, the load was distributed and the structure was able to withstand loads from all angles.

  In addition, the carbon fiber has a high tensile strength while being lightweight, and the thinly knitted yarn secures the strength with a minimum volume, so that the weight can be reduced. In addition, the elliptical shape and the ship-shaped cross section are excellent in aerodynamic resistance, which contributes to an improvement in traveling speed.

  The wheel of the deep rim structure used in racing bicycles is suitable for cruising with less undulations, but by using the deep rim structure around the honeycomb structure, stable driving without compromising the benefits of the honeycomb structure Performance can be secured.

It is the figure which showed the single-sided wheel which assembled the spoke by the honeycomb structure. It is the figure which showed the double-sided wheel which assembled the spoke by the honeycomb structure. It is the figure which showed the wheel for rear wheels which assembled the spoke by the honeycomb structure. It is the figure from the vertical direction which showed the arch shape. It is the figure which showed the wheel made into the deep rim.

  The spoke assembly when the wheel is viewed from the side is a honeycomb structure in which three regular hexagons are formed radially from the central hub, and the regular hexagons are combined toward the rim. The front surface and the back surface are displaced by 60 ° to have a structure that can withstand loads from all angles. The spoke material is made of carbon fiber coated and molded with a resin, and the carbon fiber is a knitted yarn shape. The cross-section of the spoke after the resin molding process is circular, elliptical, or ship-shaped. Two knitted carbon yarns are twisted together to form one side of a regular hexagon, and at the branch point of the regular hexagon, the two carbon yarns are separated one by one and twisted one by one separated from two adjacent sides. It was set as the manufacturing method of combining. As a result, a carbon fiber continuum was formed in which each side of all regular hexagons forming the honeycomb structure was bonded not by adhesion but by twisting. When the wheel is viewed from the vertical direction, the spoke connecting the hub and the rim is not a straight line but an arch shape curved outward. In the case of a deep rim structure, the line connecting the two sides near the six regular hexagonal rims of the front and back surfaces formed radially from the central hub is the top line of the inner circumference of the rim, and the spoke is connected to this. did.

FIG. 1 shows an embodiment of the present invention, which shows a honeycomb structure using pre-knitted carbon yarns. First, cut the first yarn stump. Start from the upper right corner. 3. Same point from upper right point of right hexagon, same upper left point (4. Same point as upper right point of left hexagon), 1. 11. Hub, same point (5. Same as upper right point of lower hexagon), same lower right point, same upper right point, 14. Return to the upper right corner. Next, the second yarn is Start from the lower midpoint, 5. From the lower hexagon point to the lower right point, the upper right point, and 1. From the hub, the upper left point, from the lower left point to the lower point. Return to the lower midpoint. 7. Third yarn Start from the upper left middle point. 1. Left hexagon upper left point, lower left point, lower left point From hub, same upper right point, same upper point, same upper left point, 8. Return to the upper left middle point. The next thread is 13. From the middle lower right point 3. 4. Right hexagon lower point, Lower right lower hexagon point, 12. Lower right point. The next thread is 10. Starting from the lower left point, 5. Lower hexagon lower left point, upper left point, 4. From the left lower left hexagon point 9. Connect with the lower left middle point. The next thread is 7. From the upper left point, 4. 2. Left hexagon upper point, same upper right point, 5. Right upper hexagon point Connected to the upper right point. Next, 13. 2. Start from the lower right middle point. 5. Right hexagon lower right point, same upper right point, same upper point, Connect to the upper right point. Next, 7. Starting from the upper left point, 4. 8. Left hexagon upper point, same left upper point, same left lower point, Connect to the middle left point. Finally, 10. Starting from the lower left point, 5. Lower hexagon lower left point, same lower point, lower right point, 12. Connect to the lower right point.
According to this method, one side of each regular hexagon is formed by two twisted carbon yarns, and all sides forming the honeycomb structure are not bonded, and a continuous carbon yarn can be obtained.

  When forming a continuous thread of honeycomb structured yarn, a mold for fixing the yarn in advance is required, and after the honeycomb structure is completed, it is fixed by resin. If the die for storing the thread is an ellipse, the cross section of the thread is also an ellipse, and if it is a ship shape, it can be molded in a ship shape. If this mold has a hemispherical shape with an arch, the finished honeycomb structure will also draw an arch as shown in FIG. After the formation of spokes with honeycomb structure, Hub and 2. Connected to the rim. The ends of the yarn are fixed with a structure capable of adjusting the tension.

  When the front and back surfaces are displaced by 60 degrees, a stronger honeycomb structure is obtained as shown in FIG. The shape has sufficient strength against loads from all directions. The figure shows the honeycomb structure on the back surface with a double line for easy viewing. FIG. 3 shows a wheel for a rear wheel. Since power is transmitted to the rear wheels, torque force is generated in the rotational direction. In order to prevent breakage due to the twist, a connection method is employed in which only the portion connected to the hub avoids the twisting torque in the rotational direction.

  FIG. The wheel which is a specification of a deep rim is shown. A line connecting two sides near the rim of the six regular hexagons on both the front and back surfaces formed radially from the central hub is a top line on the inner circumference of the rim, and a structure having a honeycomb structure spoke is connected thereto. By making the periphery of the honeycomb structure a deep rim structure, stable running performance can be ensured without impairing the merit of the honeycomb structure.

  There are many people who switch to bicycles from the viewpoint of health maintenance or environmental protection. As a hobby, the number of people participating in bicycle races is increasing year by year. There is a need for a strong and light wheel that can maintain its strength and enjoy safe and stable driving performance. The invention can be provided by the invention.

1 hub 2 rim 3 right hexagon 4 left hexagon 5 lower hexagon 6 upper right point 7 upper left point 8 middle left point 9 middle left point 10 lower left point 11 lower middle point 12 lower right point 13 middle right lower point 14 middle upper right point 15 Deep Rim

Claims (6)

  In a two-wheeled vehicle wheel that consists of hub, spoke, and rim parts, the spoke assembly when the wheel is viewed from the side is formed with three regular hexagons radially from the center hub, and further toward the rim. A wheel for a motorcycle, characterized in that spokes are assembled by a honeycomb structure combining regular hexagons.   The two-wheeled vehicle wheel having the honeycomb structure according to claim 1, wherein the spokes installed on the front and back surfaces of the wheel have a 60-degree positional relationship displaced between the front and back surfaces. wheel.   In the wheel for a motorcycle having the above honeycomb structure, the spoke material is made of carbon fiber coated and molded with a resin, and the carbon fiber is a knitted thread shape, and the cross section of the spoke after the resin molding process is circular. The wheel for a two-wheeled vehicle according to claim 1, wherein the wheel has a shape of an oval or a ship.   In the wheel for a motorcycle having the honeycomb structure, two knitted carbon yarns are twisted to form one side of a regular hexagon, and at the branch point of the regular hexagon, two carbon yarns are separated one by one and adjacent to each other. According to the manufacturing method of twisting together one piece separated from two sides, each side of all regular hexagons forming the honeycomb structure is not bonded but is a continuous body of carbon yarns joined by twisting. The method for manufacturing a wheel for a motorcycle according to claim 3.   The wheel for a motorcycle having the honeycomb structure according to claim 1 or claim 2, wherein when the wheel is viewed from the vertical direction, the spoke connecting the hub and the rim is not a straight line but an arch shape curved outward. The wheel for two-wheeled vehicles in any one of Claim 2 or Claim 3.   In the wheel for a motorcycle having the above honeycomb structure, a line connecting two sides near the rim of the six regular hexagons on both the front and back surfaces formed radially from the central hub is a top line on the inner periphery of the rim, and a spoke is attached to this. The wheel for two-wheeled vehicles in any one of Claim 2 or Claim 3 characterized by the deep rim structure to connect.

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