TWI421175B - Method of manufacturing bicycle wheel rim - Google Patents

Description

Bicycle wheel manufacturing method

The present invention relates to a method of manufacturing a bicycle rim.

Conventional composite rims are usually made of carbon fiber cloth, wherein the carbon fiber cloth is usually a single layer structure in the same arrangement, for example, 90 degrees, 60 degrees, 45 degrees, 30 degrees, 0 degrees or woven. Arrangement, etc., however, different arrangements will inevitably result in different stress directions, different strengths, and suitable force directions are different. Therefore, structural strength and tension cannot be balanced.

However, if a plurality of carbon fiber cloths of different arrangement directions are laminated together, the carbon fiber cloth layers in different alignment directions are easy to slide, and cannot be reliably positioned, so that the formed wheel is not structurally strong at all.

Further, if a strip member is provided for reinforcing the structural strength, the multi-layer carbon fiber cloth and the strip member are difficult to be closely laminated together, and are easily slid and dispersed.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method of manufacturing a bicycle rim to provide a rim having better structural strength and better tension.

In order to achieve the above object, the present invention provides a method for manufacturing a bicycle rim, comprising the steps of: laminating a composite material: sequentially laminating at least two composite material layers, wherein the stacking directions of the two composite material layers are different from each other, After the composite materials are laminated, a raw material layer is formed, the raw material layer has a first surface and a second surface, and the raw material layer Having a first end and a second end; placing the strips: spacing the two strips at predetermined positions on the first side of the material layer, and extending the strips to the strip The first end and the second end are perpendicular to each other; preforming: bending the first end and the second end of the material layer toward the same side of the material layer at a first bend and extending a predetermined distance And bending and extending a predetermined distance to the first surface at a second bending portion to cover the two strips and further conforming to the first surface of the material layer to form a general a U-shaped preform, wherein the first end and the second end of the material layer are folded back along the first surface of the material layer after being folded at the second bend, and further passed through the first bend Extending between the two first bends; stitching: stitching the preform to form at least four stitches to fix the overlapping material layers to each other; forming: placing the stitched preform in a mold Applying a warming pressure treatment to harden the material layer into a rim, wherein the rim The utility model has a bottom edge and two side edges respectively extending from opposite sides of the bottom edge and facing each other.

Two of the sutures are respectively adjacent to the two strips, and the other two sutures are respectively located at one side of the bottom edge of the rim.

Thereby, the rim provided by the invention is formed by laminating the composite material layers with different layers in the direction of the plurality of layers to form a rim having both strength and tension, and the stitching treatment further strengthens the structural strength and the positioning effect of the strips.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 to FIG. 4, the present invention provides a method for manufacturing a composite rim, comprising the following steps:

Laminated composite material: at least two composite material layers 1a, 1b, 1c, 1d are sequentially stacked, wherein the composite material layers 1a, 1b, 1c, 1d are arranged differently from each other, and the composite material layers 1a, 1b, 1c, 1d are superposed to form a raw material layer 1, as shown in FIG. 1 and FIG. 2, the raw material layer 1 has a first surface and a second surface, and the raw material layer has a first one. End 11 and a second end 12. In the main embodiment of the present invention, each of the composite material layers 1a, 1b, 1c, and 1d is a carbon fiber cloth, and the raw material layer 1 is formed by laminating more than two composite material layers 1a, 1b, 1c, and 1d, as shown in the figure. 1 and FIG. 2, and at least two adjacent composite layers 1a, 1b, 1c, 1d have different alignment directions, such as 90°, 60°, 45°, 30°, 0° or a weaving arrangement, thereby Strengthen the stress between the layer and the layer, and can take into account the structural strength and tensile strength.

Positioning the strips: the two strips 2 are placed at predetermined positions on the first side of the material layer 1, and the extending direction of each strip 2 is opposite to the first end 11 and the second end 12 The connection is vertical, as shown in Figure 2.

Pre-forming: the first end 11 and the second end 12 of the raw material layer 1 are respectively bent at a first bend toward the same side of the raw material layer 1 and extended by a predetermined distance, and then reversed to a second The bend is bent toward the first face and extends a predetermined distance The strip 2 is sandwiched and further adhered to the first side of the material layer 1 to form a U-shaped preform A, as shown in FIG. 3, wherein the material layer 1 is The first end 11 and the second end 12 extend along the first surface of the material layer 1 after being folded back at the second bend, and further extend through the first bend to the first first bend respectively between.

Stitching: The preform A is sewn to form at least four stitches 3, and subjected to warming and pressing treatment to harden the material layer 1 into a rim B, as shown in FIG. In the main embodiment of the present invention, the preform A is sewn to form four seams 3, which are closely attached to the seam along the inner side of each strip 2, thereby reliably positioning the strip 2, And to facilitate the combination of the composite material layers 1a, 1b, 1c, 1d to avoid sliding off, preferably, the extending direction of the stitching is parallel to the extending direction of each of the strips.

The rim B has a bottom edge 41 and two side edges 42 extending from opposite sides of the bottom edge 41 and opposite to each other. The two strips 2 are respectively located at the bottom edge 41 and the rim Two sides of the two side edges 42 are adjacent to each other, and a side of each of the side edges 42 facing away from the other side 42 forms a braking edge 421, and each of the side edges 42 is bent away from one end of the bottom edge 41 toward the other side 42. Forming a frame lip 422 for fixing a tire, the bottom edge 41 and the two side edges 42 together enclose a tire groove. In short, the wheel B is a frame and can be supplied A tire combination.

In particular, in the main embodiment of the present invention, the two strips 2 are respectively located on one of the frame lips 422 of the rim, wherein the two seams 3 are located between the second bend and the strip 2 Adjacent to the strip 2 to provide better structural strength The frame lip is used to increase the strength of the combination with the tire, and the other two seams 3 are respectively located near the side edge 42 of the bottom edge 41 of the rim, thereby maintaining the shape of the U-shaped wheel frame and improving the strength.

In summary, the manufacturing method of the composite rim provided by the invention can be used for manufacturing a rim having good structural strength and tensile strength, and can reliably position the strips, and can avoid sliding between the multilayer composites or Detachment is actually a progressive effect, in line with the patent requirements stipulated by the national patent law, and the patent application is filed according to law.

1‧‧‧Material layer

41‧‧‧Bottom

11‧‧‧ first end

42‧‧‧ side

12‧‧‧ second end

421‧‧‧煞车煞

1a, 1b, 1c, 1d‧‧‧ composite layers

422‧‧‧Box lip

2‧‧‧Articles

A‧‧‧Preform

3‧‧‧ stitching

B‧‧‧Rounds

Figure 1 is a schematic cross-sectional view showing the composition of the present invention.

Figure 2 is a schematic view of a laminated composite of the present invention.

Figure 3 is a schematic illustration of the preforming of the present invention.

Figure 4 is a schematic view of the molding of the present invention.

2‧‧‧Articles

3‧‧‧ stitching

41‧‧‧Bottom

42‧‧‧ side

421‧‧‧煞车煞

422‧‧‧Box lip

B‧‧‧Rounds

Claims (5)

A method for manufacturing a bicycle rim comprises the steps of: laminating a composite material: sequentially laminating at least two composite material layers, wherein the two composite material layers are arranged differently from each other, and the composite materials are laminated to form a composite material. a material layer having a first surface and a second surface opposite to each other, the material layer having a first end and a second end opposite to each other; and a strip-shaped member: at least two strips are spaced apart At a predetermined position on the first side of the material layer, and the extending direction of each strip is perpendicular to the first end and the second end; preforming: the first end and the second end of the raw material layer Ends are respectively bent toward a first bend of the material layer and extended by a predetermined distance, and then bent at a second bend toward the first surface and extended by a predetermined distance to The two strips are sandwiched and further adhered to the first side of the material layer to form a U-shaped preform, wherein the first end and the second end of the material layer are in the second bend After the fold is folded back, it extends along the first side of the raw material layer, and further passes through Extending the first bend between the two first bends; stitching: stitching the preform to form at least four stitches to fix the overlapping material layers to each other; forming: pre-finishing The molded body is placed in a mold, and subjected to warming and pressing treatment, so that the raw material layer is hardened into a rim, wherein the rim has a bottom side and two side edges, and the two sides are opposite from the bottom side respectively. Side extensions and opposite to each other; wherein the two sutures are respectively adjacent to the two strips, and the other sutures are respectively located in the wheel The bottom edge of the circle is near one side. The method of manufacturing a bicycle rim according to claim 1, wherein the extending direction of the stitching is parallel to the extending direction of each of the strips. The method of manufacturing a bicycle rim according to claim 1, wherein each of the composite material layers is a carbon fiber cloth. The method of manufacturing a bicycle rim according to any one of claims 1 to 3, wherein a side of each side of the rim facing away from the other side forms a brake side, each side being away from the bottom side One end is bent toward the other side to form a frame lip for fixing a tire, and the bottom edge and the two sides together define a tire groove. The method of manufacturing a bicycle rim according to claim 4, wherein the two strips are respectively located on one of the rims of the rim, and the suture is located between the second bend and the strip adjacent to the rim Strips.