Puncture-proof and gas-retaining tubeless road bicycle tire

Abstract

The invention relates to the field of tubeless tires of bicycles, and discloses a puncture-proof and air-retaining tubeless road bicycle tire which is characterized in that a first cloth puncture-proof layer and a second cloth puncture-proof layer are additionally arranged between a tire tread and a tire body cord fabric layer. The first cloth puncture-proof layer wraps the seam allowance on one side of the tire to the seam allowance on the other side of the tire, and reverse wrapping is formed at the seam allowance part, so that the seam allowance of the tire can be firmly fixed in a bead seat of a rim, and the safety and the airtight performance of the tire are effectively improved. The first cloth stab-resistant layer and the second cloth stab-resistant layer are made of compact canvas, so that the stab-resistant performance of the tire can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of bicycle tubeless tires, in particular to a puncture-proof and air-retaining tubeless road bicycle tire. Background Art

[0002] In the development history of automobile tires, the emergence of tubeless tires is an important innovation. Traditional tires rely on inner tubes to inflate, while the airtight layer of tubeless tires is directly attached to the inner wall of the tire, which can effectively prevent gas leakage and cooperate with special rims to form a sealed space for inflation.

[0003] The advantages of tubeless tires are very significant. From a safety perspective, the lack of an inner tube reduces the risk of sudden blowouts caused by inner tube rupture. Even if punctured by a sharp object, the rubber at the puncture will tightly wrap the foreign object, allowing the gas to leak slowly, giving the driver more time to respond. In terms of maintenance convenience, tubeless tires are easier to install and remove, and there is no need to carefully handle the inner tube like traditional tires, reducing the difficulty and cost of maintenance. At the same time, it has better heat dissipation performance, because there is less friction between the inner tube and the outer tire to generate heat, it can maintain a lower temperature when driving at high speeds or for long periods of time, extending the service life of the tire.

[0004] However, the manufacturing process of tubeless tires is relatively complex and the cost is high, which makes the price of tubeless tires generally higher than that of traditional tires. Moreover, the requirements for rims are strict, and they must be matched with special rims to ensure good sealing, which limits their application in some old models. In addition, in extreme cases, such as when the tire is severely damaged, it is difficult to repair tubeless tires, and the entire tire may need to be replaced, unlike traditional tires where the inner tube can be repaired.

[0005] A Chinese invention patent (publication number: CN117698336A, publication date: 2024.03.15) discloses a non-inflatable vacuum tire. The tire includes a tread layer and a carcass ply, the tread layer is arranged above the carcass ply and located at the tire crown, 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 carcass ply or fixedly arranged below the carcass ply, the puncture-proof airtight layer includes one or more layers of canvas, the warp and weft of the canvas are composed of a plurality of filaments, and the canvas is formed into a puncture-proof airtight layer by dipping and coating; the puncture-proof airtight layer at least covers the spur mouth to the shoulder position, and the lower end of the puncture-proof airtight layer extends to the spur mouth position and forms an inverted structure. The vacuum tire improves the puncture resistance and airtightness of the tire by a puncture-proof airtight layer composed of dipped and coated canvas. However, road bicycles need to be lightweight, so this tire is not suitable for road bicycles. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a puncture-proof and air-preserving tubeless road bicycle tire.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: The tire includes a tread, a first anti-puncture layer, a second anti-puncture layer, and a carcass ply. The first anti-puncture layer and the second anti-puncture layer are fixedly arranged between the tread and the carcass ply. Both ends of the carcass ply are turned up to the lower part of the crown position of the tread, and the two ends of the carcass ply overlap or leave a gap. The first anti-puncture layer wraps from the bead on one side of the tire to the bead on the other side and forms a turn-up at the bead position. The transverse width of the first anti-puncture layer at the bead position is 1-5 mm. The second anti-puncture layer is located above or below the first anti-puncture layer and can completely cover the two ports of the carcass ply, and the transverse width of the second anti-puncture layer is 10-40 mm. The first anti-puncture layer and the second anti-puncture layer are made of a single-layer canvas, and the density of the warp and weft of the canvas is 300-720 threads / 10 cm.

[0008] Preferably, the distance between the two ends of the ply is 5≤A≤35 mm.

[0009] Preferably, the density of the warp and weft of the ply is 300-720 threads / 10 cm.

[0010] Preferably, a chafing cloth is provided on the outer side of the first anti-puncture layer at the bead position.

[0011] For the puncture-proof and air-preserving tubeless road bicycle tire designed by the present invention, a first anti-puncture layer and a second anti-puncture layer are added between the tread and the carcass ply. The first anti-puncture layer wraps from the bead on one side of the tire to the bead on the other side and forms a turn-up at the bead position, which can firmly fix the bead of the tire inside the bead seat of the rim, effectively improving the safety and airtight performance of the tire. The first anti-puncture layer and the second anti-puncture layer are made of dense canvas, which can effectively improve the puncture-proof performance of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 One of the structural schematic diagrams of the tire of the present invention.

[0013] Figure 2 Another structural schematic diagram of the tire of the present invention.

[0014] Figure 3 Another structural schematic diagram of the tire of the present invention. DETAILED DESCRIPTION

[0015] Combined with the embodiments of the present invention, the technical solutions in the embodiments will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0017] Embodiment 1 As Figure 1 shown, a puncture-proof and air-preserving tubeless road bicycle tire, the tire includes a tread 1, a first cloth puncture-proof layer 2, a second cloth puncture-proof layer 3, and a ply 4 from outside to inside. Both ends of the ply 4 are turned up and wrapped below the crown position of the tread 1, and both ends of the ply 4 overlap each other, with a spacing width A = 30 mm. The warp and weft densities of the ply 4 are 500 threads / 10 cm.

[0018] The first cloth puncture-proof layer 2 wraps from the bead 5 on one side of the tire to the bead 5 on the other side. The lateral width of the first cloth puncture-proof layer 2 at the bead 5 is 5 mm, and a chafing cloth 6 is provided on the outer side of the first cloth puncture-proof layer 2 at the bead 5. The second cloth puncture-proof layer 3 is located above the first cloth puncture-proof layer 2, can completely cover both ports of the ply 4, and the lateral width of the second cloth puncture-proof layer 3 is 40 mm. The first cloth puncture-proof layer 2 and the second cloth puncture-proof layer 3 are made of canvas, and the warp and weft densities of the canvas are 500 threads / 10 cm.

[0019] Embodiment 2 As Figure 2 shown, a puncture-proof and air-preserving tubeless road bicycle tire, the tire includes a tread 1, a first cloth puncture-proof layer 2, a second cloth puncture-proof layer 3, and a ply 4 from outside to inside. Both ends of the ply 4 are turned up and wrapped below the crown position of the tread 1, and there is a gap between both ends of the ply 4, with a spacing width A = 15 mm. The warp and weft densities of the ply 4 are 500 threads / 10 cm.

[0020] The first puncture-proof layer 2 wraps from the bead 5 on one side of the tire to the bead 5 on the other side. The transverse width of the first puncture-proof layer 2 at the bead 5 is 5 mm. The second puncture-proof layer 3 is located above the first puncture-proof layer 2 and can completely cover the two ports of the carcass ply 4, and the transverse width of the second puncture-proof layer 3 is 40 mm. The first puncture-proof layer 2 and the second puncture-proof layer 3 are made of canvas, and the density of the warp and weft of this canvas is 500 threads / 10 cm.

[0021] Comparative Example 1 The difference from Example 1 is that the first puncture-proof layer 2 is made of mesh fabric.

[0022] Comparative Example 2 The difference from Example 1 is that the transverse width of the first puncture-proof layer 2 at the bead 5 is 0 mm.

[0023] Comparative Example 3 The difference from Example 1 is that the transverse width of the first puncture-proof layer 2 at the bead 5 is 6 mm.

[0024] Comparative Example 4 The difference from Example 1 is that the second puncture-proof layer 3 is not used.

[0025] A tubeless road bicycle tire, the tire includes a tread 1 and a carcass ply 4 from outside to inside. The two ends of the carcass ply 4 are turned up and wrapped under the crown position of the tread 1, and the two ends of the carcass ply 4 overlap each other, and the spacing width A = 30 mm. The density of the warp and weft of this carcass ply 4 is 500 threads / 10 cm.

[0026] The first puncture-proof layer 2 wraps from the shoulder on one side of the tire to the shoulder on the other side. The transverse width of the first puncture-proof layer 2 at the bead 5 is 5 mm. The second puncture-proof layer 3 is located above the first puncture-proof layer 2 and can completely cover the two ports of the carcass ply 4, and the transverse width of the second puncture-proof layer 3 is 40 mm. The first puncture-proof layer 2 and the second puncture-proof layer 3 are made of canvas, and the density of the warp and weft of this canvas is 500 threads / 10 cm.

[0027] The airtightness of the tires of Example 1, Example 2 and Comparative Example 1 was tested, and the internal tire pressure was measured indirectly within 24 h. The results are shown in Table 1. Duration (h) Comparative Example 1 (kPa) Comparative Example 2 (kPa) Comparative Example 3 (kPa) Example 1 (kPa) Example 2 (kPa) 0 550 550 550 550 550 1 512 528 541 541 534 2 483 501 538 537 529 3 455 476 534 533 524 6 395 450 526 526 516 9 352 400 521 520 509 12 300 350 512 511 504 24 223 296 501 501 495

[0028] Table 1 Record table of internal tire pressure change within 24 h As can be seen from Table 1, the airtightness of Examples 1 and 2 is better than that of Comparative Examples 1 and 3. From Examples 1 and Comparative Example 1, it can be seen that although the mesh fabric is thinner and lighter than the canvas, its airtightness is relatively poor; from Examples 1 and Comparative Example 2, it can be seen that if the first stab-proof layer 2 does not form a reverse wrap at the rabbet 5, the air retention effect will be greatly weakened; from Examples 1 and Comparative Example 3, it can be seen that a wider reverse wrap width does not bring better airtightness, but instead causes waste of materials and an increase in the weight of the tire.

[0029] Table 2 Puncture Resistance Performance Test Category Puncture force threshold (N) Leakage rate after being punctured by a sharp object (kPa / min) Example 1 800 2 Comparative Example 1 500 5 Comparative Example 4 650 3 The above is the description of the embodiments of the present invention. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. 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 herein, but rather to the widest scope consistent with the principles and novel points disclosed herein.

Claims

1. A puncture-proof and air-retaining tubeless road bicycle tire, characterized in that, The tire includes a tread (1), a first puncture-proof layer (2), a second puncture-proof layer (3), and a carcass ply (4). The first puncture-proof layer (2) and the second puncture-proof layer (3) are fixedly arranged between the tread (1) and the carcass ply (4). Both ends of the carcass ply (4) are turned up to the position below the crown of the tread (1), and both ends of the carcass ply (4) are overlapped or have a gap; the first puncture-proof layer (2) wraps from the bead (5) on one side of the tire to the bead (5) on the other side and forms a turn-up at the bead (5) portion. The lateral width of the first puncture-proof layer (2) at the bead (5) portion is 1-5 mm; the second puncture-proof layer (3) is located above or below the first puncture-proof layer (2) and can completely cover the two ports of the carcass ply (4), and the lateral width of the second puncture-proof layer (3) is 10-40 mm; the first puncture-proof layer (2) and the second puncture-proof layer (3) are made of a single-layer canvas, and the warp and weft densities of the canvas are 300-720 threads per 10 cm.

2. The tubeless puncture-proof and air-retaining road bicycle tire according to claim 1, wherein The distance between both ends of the carcass ply (4) is 5 ≤ A ≤ 35 mm.

3. A puncture-resistant and air-retaining tubeless road bicycle tire according to claim 1, characterized in that, The warp and weft densities of the carcass ply (4) are 300-720 threads per 10 cm.

4. A puncture-proof and air-retaining tubeless road bicycle tire according to claim 1, characterized in that, An anti-abrasion cloth (6) is arranged on the outer side of the first puncture-proof layer (2) at the bead (5) portion.

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