CN118665082A - Ultra-wide section bicycle tire - Google Patents

Abstract

The present invention relates to the field of tire manufacturing, and in particular to an ultra-wide section bicycle tire. An ultra-wide section bicycle tire, the tire section width is greater than 3.0 inches, the tire comprises a carcass, the carcass is composed of a cord layer located on the inner side of the tire and a buffer layer located below the crown, the cord layer comprises a first layer of cord fabric and a second layer of cord fabric, the second layer of cord fabric is located on the inner side of the first layer of cord fabric; the first layer of cord fabric is wrapped around the bead to the position of the tire shoulder pattern block, and the distance A between the end point of the cord fabric and the tire shoulder pattern is greater than 5mm; the inner second layer of cord fabric is wrapped around the bead to the position near the tire rim line, and the distance h between the end point of the cord fabric and the bead of the tire is greater than 5mm. The tire can effectively reduce the rolling resistance of the tire, improve the handling performance of the tire, and at the same time avoid the sidewall wrinkle problem of tires without rubber on the sidewall.

Description

Ultra-wide section bicycle tire

Technical Field

The invention relates to the field of tire manufacturing, in particular to an ultra-wide section bicycle tire.

Background Art

As an important part of bicycles, bicycle tires play a vital role in the performance and service life of bicycles. As cycling enthusiasts continue to increase their requirements for bicycle performance, the design and manufacturing technology of bicycle tires are also constantly improving. In particular, ultra-wide section bicycle tires (tire section width greater than 3.0 inches) can show significant advantages in improving handling, comfort and durability.

The Chinese invention patent application (publication number: CN116901619A, publication date: 2023-10-20) discloses a non-inflatable vacuum tire, which includes a tread layer and a cord layer, the tread layer is arranged above the cord layer and located at the crown of the tire, and the surface of the tread layer is provided with a pattern groove; the tire also includes a puncture-proof airtight layer, the puncture-proof airtight layer is fixedly arranged between the tread layer and the cord layer or fixedly arranged below the cord layer, and the puncture-proof airtight layer includes one or more layers of canvas, and the canvas is formed into a puncture-proof airtight layer by dipping and coating; the vacuum tire improves the puncture resistance and airtightness of the tire through the puncture-proof airtight layer composed of dipped and coated canvas. However, there is not much improvement in reducing the rolling resistance of the tire and improving the handling and comfort.

Summary of the invention

In order to solve the above technical problems, the purpose of the present invention is to provide an ultra-wide section bicycle tire, which can effectively reduce the tire rolling resistance, improve the tire handling performance, and avoid the sidewall wrinkle problem of tires without rubber on the sidewall.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

An ultra-wide section bicycle tire, the tire section width is greater than 3.0 inches, the tire comprises a carcass, the carcass is composed of a cord layer located inside the tire and a buffer layer located below the crown, the cord layer comprises a first cord layer and a second cord layer, the second cord layer is located inside the first cord layer;

The two first cord fabric end points of the first layer of cord fabric do not overlap each other, the distance between them is greater than 10 mm, and the distance A between the first cord fabric end point and the tire shoulder pattern overlap is greater than 10 mm;

The second layer of cord fabric is wrapped around the tire mouth to a position near the tire rim line, and the distance h between the two second cord fabric end points of the second layer of cord fabric and the tire mouth is greater than 5mm;

The two ends of the buffer layer are respectively located below the first layer of cord fabric, and are overlapped with the two first cord fabric end points of the first layer of cord fabric, and the overlapping length is greater than 10 mm.

Preferably, the buffer layer is cross-laminated with the second layer of cord layer, the buffer layer is laminated between the tread and the cord layer, and the tail of the first layer of cord fabric is laminated above or below the buffer layer; preferably, the buffer layer is cross-laminated with the second layer of cord layer in the warp direction.

Preferably, the first layer of cord fabric and the second layer of cord fabric are made of nylon, rayon, PET, PEN, lyocell, aramid or a combination thereof, and the angle between the warp and the equatorial plane X is 30-60°.

Preferably, the ratio of the tire section height H to the section width L is 1:1-1:1.5; the height h2 of the top and bottom surfaces of the tread is 5-20 mm, preferably, the ratio of the tire section height H to the section width L is 1:2-1:1.4, and the height h2 of the top and bottom surfaces of the tread is 8-15 mm. The above structure can significantly increase the contact area, thereby improving grip and stability.

Preferably, the crown comprises a crown portion extending across the equatorial plane X and two lateral portions arranged on opposite axial sides relative to the crown portion; the curvature radius of the crown portion is 150-250 mm, and the angle a is 8-15°; the curvature radius of the lateral portion is 30-45 mm, and the angle β is 25-45°.

Preferably, the distance A between the end point of the first layer of cord fabric and the shoulder pattern of the tire is 6-20 mm; the distance h1 between the end point of the second layer of cord fabric and the tire mouth is 10-20 mm; and/or, the distance between the two first cord fabric ends is 10 mm-80 mm, and the overlap length of the buffer layer and the two first cord fabric ends is greater than 10-40 mm. The above distances can be adjusted according to the tire section width of the tire.

Preferably, the tire sidewall has no rubber layer, or a rubber layer is provided from the tire sidewall to the gusset; the first layer of cord fabric and the second layer of cord fabric are laminated in parallel; the second layer of cord fabric and the buffer layer are cross-laminated with the same warp direction.

Preferably, a layer of anti-rug cloth with a width of 6mm-20mm is adhered to the tire mouth; preferably, the anti-rug cloth is made of canvas; more preferably, the canvas is made of a fabric material selected from nylon, rayon, PET, PEN, lyocell, aramid or a combination thereof.

Preferably, the distance from the upper end point of the anti-rug cloth to the tire mouth is 6-20 mm.

Preferably, a rubber layer is provided from the sidewall to the lip of the tire, and the anti-scratch cloth is located between the rubber layer and the cord layer.

The present invention improves the compression resistance and wear resistance of the tire by innovatively designing an ultra-wide section bicycle tire and optimizing the design of the carcass structure and the cord fabric layer. A special structural design is adopted to reduce the deformation of the tire during driving, thereby reducing the rolling resistance. To this end, the present invention has made significant progress in reducing rolling resistance, improving handling performance and improving riding comfort. This technical solution not only solves the wrinkle problem of traditional tires without rubber on the sidewall, but also optimizes the material selection and structural design, providing new ideas and technical support for the development of bicycle tires.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of the structure of Embodiment 2 of the present invention.

FIG3 is a schematic diagram of the structure of Embodiment 3 of the present invention.

FIG. 4 is a schematic structural diagram of a buffer layer, a first layer of cord fabric, and a second layer of cord fabric according to the present invention.

DETAILED DESCRIPTION

The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example 1

As shown in FIG. 1 , an ultra-wide section bicycle tire has a tire section width of 4.0 inches. The tire comprises a crown 1, a sidewall 2, a tread 3 and a carcass 4. The ratio of the tire section height H to the section width L is 1:1.35. The heights h2 of the top and bottom surfaces of the crown 1 are 10 mm. The crown 1 comprises a crown portion extending across the equatorial plane X and two lateral portions arranged on opposite sides of the crown portion in the axial direction. The radius of curvature of the crown portion is 200 mm, and the angle a is 12°. The radius of curvature of the lateral portion is 40 mm, and the angle β is 30°.

As shown in FIG1 , the carcass 4 is composed of a cord layer located on the inner side of the tire and a buffer layer 43 located below the tread crown 1, wherein the cord layer includes a first layer of cord fabric 41 and a second layer of cord fabric 42, wherein the second layer of cord fabric 42 is located on the inner side of the first layer of cord fabric 41; the first layer of cord fabric 41 is wrapped around the sub-mouth 3 to the position of the tire shoulder pattern block, and the two first cord fabric end points 44 of the first layer of cord fabric 41 do not overlap with each other, and the distance between the two is 30 mm, and the distance A of the first cord fabric end point 44 overlapping with the tire shoulder pattern is 35 mm; the second layer of cord fabric 42 is wrapped around the sub-mouth 3 to the position near the tire rim line, and the distance h1 of the two second cord fabric end points 45 of the second layer of cord fabric 42 to the tire sub-mouth 3 is 20 mm; the two ends of the buffer layer 43 are respectively located below the first layer of cord fabric 41, and are overlapped with the two first cord fabric end points 44 of the first layer of cord fabric 41, and the overlapping length is 33 mm.

As shown in FIG4 , the first layer of cord fabric 41 and the second layer of cord fabric 42 do not overlap in the middle; the first layer of cord fabric 41 and the second layer of cord fabric 42 are laminated in the same layer; the second layer of cord fabric 42 and the buffer layer 43 are laminated crosswise, and the warp direction is the same. The buffer layer 43 and the second layer of cord fabric 42 are laminated crosswise, the buffer layer 43 is laminated between the crown 1 and the cord layer, and the tail of the first layer of cord fabric 41 is laminated on or below the buffer layer 43. The cord fabric of the buffer layer 43, the first layer of cord fabric 41 and the second layer of cord fabric 42 are made of nylon, rayon, PET, PEN, lyocell fiber, aramid or a combination thereof, and the angle between the warp and the equatorial plane X is 45°.

As shown in FIG1 , the tire sidewall has no rubber layer, and a layer of anti-rug cloth 7 with a width of 15 mm is attached to the tire mouth 3; the distance between the end of the anti-rug cloth 7 and the tire mouth 3 is 12 mm. The material type of the anti-rug cloth 7 is canvas; the canvas is made of a fabric material selected from nylon, rayon, PET, PEN, lyocell fiber, aramid or a combination thereof.

Example 2

As shown in FIG. 2 , a rubber layer is provided from the sidewall of the tire to the tip 3 ; other technical features are as shown in Example 1.

Example 3

As shown in FIG. 3 , the tire mouth 3 is not provided with an anti-rubbing cloth 7 ; other technical features are the same as those shown in Example 1.

Comparative Example 1

The structure of the cord layer and the stab-proof airtight layer disclosed in the Chinese invention patent application (publication number: CN116901619A, publication date: 2023-10-20) is adopted, and other technical features are as in Example 1.

The following is a comparative data of effectively reducing the tire rolling resistance compared with Example 1 and Comparative Example 1.

Test process: Rolling resistance test machine - Paul Koster GmbH, Germany

Experimental data: (rolling resistance reduced by 25%)

The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novelties disclosed herein.

Claims (10)

1. An ultra-wide section bicycle tire, the tire section width is greater than 3.0 inches, the tire includes crown (1), sidewall (2), bead (3) and carcass (4), the carcass (4) is located the inboard ply and located under crown (1) and buffer layer (43) to make up, characterized by that, the ply includes the first layer of cord fabric (41) and second layer of cord fabric (42), the second layer of cord fabric (42) is located the inboard of the first layer of cord fabric (41);

The first layer of the cord fabric (41) bypasses the seam allowance (3) and reversely wraps the tire shoulder pattern block position, two first cord fabric end points (44) of the first layer of the cord fabric (41) are not overlapped with each other, the distance between the two first cord fabric end points is larger than 10mm, and the distance A between the first cord fabric end points (44) and the tire shoulder pattern is larger than 10mm;

The second layer of cord fabric (42) is reversely wrapped around the seam allowance (3) to a position near the tire rim line, and the distance h1 between two second cord fabric endpoints (45) of the second layer of cord fabric (42) and the tire seam allowance (3) is more than 5mm;

the two ends of the buffer layer (43) are respectively positioned below the first layer of cord fabric (41) and are mutually overlapped with two first cord fabric end points (44) of the first layer of cord fabric (41), and the mutually overlapped length is more than 10mm.

2. The ultra-wide section bicycle tire according to claim 1, characterized in that the buffer layer (43) is cross-bonded with the second layer of cord fabric (42), the buffer layer (43) is bonded between the crown (1) and the ply, and the tail of the first layer of cord fabric (41) is bonded above or below the buffer layer (43); preferably, the buffer layer (43) is cross-bonded to the second layer of cord fabric (42) in the warp direction.

3. An ultra-wide section bicycle tyre according to claim 1 or 2, characterized in that the first layer of cord fabric (41) and the second layer of cord fabric (42) are made of a fabric material selected from nylon, rayon, PET, PEN, lyocell, aramid or a combination thereof, the warp threads having an angle of 30-60 ° with respect to the equatorial plane X.

4. An ultra-wide section bicycle tire according to claim 1, wherein the ratio of tire section height H to section width L is 1:1-1:1.5; the height H2 of the top and bottom surfaces of the crown (1) is 5-20mm, preferably the ratio of the tire section height H to the section width L is 1:2-1:1.4, and the height H2 of the top and bottom surfaces of the crown (1) is 8-15mm.

5. An ultra-wide section bicycle tyre according to claim 4, characterized in that the crown (1) comprises a crown (1) portion extending across the equatorial plane X and two lateral portions arranged on axially opposite sides with respect to the crown (1) portion; the curvature radius of the crown (1) is 150-250mm, and the angle a is 8-15 degrees; the radius of curvature of the lateral portion is 30-45mm and the angle beta is 25-45 deg..

6. An ultra-wide section bicycle tire according to claim 1, characterized in that the distance a between the end point of the first layer of cord fabric (41) and the shoulder pattern of the tire is 6-35mm; the distance h1 from the tire fabric end point of the second layer of tire fabric (42) to the tire bead (3) is 10-20mm; and/or the distance between the two first cord fabric end points (44) is 20mm-80mm, and the overlapping length of the buffer layer (43) and the two first cord fabric end points (44) is more than 10-40mm.

7. An ultra-wide section bicycle tyre according to claim 1, characterized in that the tyre side is free of a layer of rubber, or the tyre side is provided with a layer of rubber at the location of the bead (3); the first layer of the cord fabric (41) and the second layer of the cord fabric (42) are laminated in sequence; the second layer of cord fabric (42) is crossed and attached with the buffer layer (43), and the warp directions are the same.

8. An ultra-wide section bicycle tyre according to any one of claims 1-7, characterized in that the bead (3) of the tyre is fitted with a layer of anti-friction cloth (7) having a width of 6-20 mm; preferably, the material type of the rubbing cloth (7) is canvas; still more preferably, the canvas is a woven material of nylon, rayon, PET, PEN, lyocell, aramid, or combinations thereof.

9. An ultra-wide section bicycle tyre according to claim 8, characterized in that the distance from the end point of the rubbing cloth (7) to the tyre bead (3) is 6-20mm.

10. An ultra-wide section bicycle tyre as claimed in claim 8, characterized in that the tyre is provided with a layer of rubber at the side to the bead (3) and the anti-rubbing cloth (7) is located between the layer of rubber and the ply.