Puncture-proof and explosion-proof bicycle tire

Abstract

The invention relates to the technical field of bicycle tires, in particular to a puncture-proof and explosion-proof bicycle tire. The invention provides a puncture-proof and explosion-proof bicycle tire. The puncture-proof and explosion-proof bicycle tire is sequentially provided with a tire body cord fabric layer, a steel wire cord fabric layer and tread rubber from inside to outside. According to the puncture-proof and explosion-proof bicycle tire, the puncture-proof and explosion-proof performance can be remarkably improved while the riding experience is considered.

Description

Technical Field

[0001] This invention relates to the field of bicycle tire technology, and more particularly to a puncture-proof and explosion-proof bicycle tire. Background Technology

[0002] Puncture damage to bicycle tires is one of the most common accidents during cycling. Sharp objects (such as gravel, glass, and nails) can easily penetrate the tire crown, leading to air leakage or a blowout, especially when riding on unpaved roads where the risk is significantly increased. To improve puncture resistance, the industry has developed various technical solutions, but all have obvious limitations. For example, existing technology discloses a tubeless tire with a polymer composite puncture-resistant layer. This tire has a tubeless structure and, from the outside in, includes a tread rubber (contact layer), a cushioning layer, a carcass ply (polyester or nylon), a polymer composite puncture-resistant layer (such as a thickened butyl rubber or aramid fiber layer), and an innermost airtight layer. It achieves this by adding a layer of polymer composite material between the carcass ply and the airtight layer, utilizing the material's thickness and toughness to prevent sharp objects from penetrating, while relying on the carcass ply to maintain basic structural strength. Meanwhile, because polymer composite materials are prone to fatigue deformation after long-term road impact, their puncture resistance decreases with the extension of use time, and their resistance to puncture by high-strength sharp objects (such as nails) is weakened, there is still a risk of tire blowout. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a puncture-proof and explosion-proof bicycle tire, which can significantly improve the puncture-proof and explosion-proof performance while taking into account the riding experience.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a puncture-proof and explosion-proof bicycle tire, comprising, from the inside out, a tire carcass ply, a steel cord ply, and a tread compound.

[0005] Preferably, the steel cord layer does not completely cover the tire carcass cord layer, but rather covers the entire tire crown area in a continuous ring.

[0006] Preferably, the angle between the two sides of the steel cord fabric layer and the two sides of the tire crown centerline is ≤45°.

[0007] Preferably, the steel wire cord layer coincides with the contact surface of the puncture-proof and explosion-proof bicycle tire in the thickness direction.

[0008] Preferably, the thickness of the steel wire cord fabric layer is 0.5~0.8mm.

[0009] Preferably, the angle between the weaving angle of the steel wires in the steel cord layer and the circumferential direction of the tire is 30~45°.

[0010] Preferably, the steel cord fabric layer is bonded to the carcass cord layer and the tread adhesive layer by adhesive bonding.

[0011] Preferably, the steel wire cord layer is replaced with a mixed cord layer of aramid and steel wire or a composite cord layer of steel wire and nylon interwoven.

[0012] Preferably, it also includes steel wire rings; The steel wire ring is located in the annular area where the puncture-proof and explosion-proof bicycle tire contacts the wheel hub.

[0013] Preferably, the tire carcass ply is composed of more than one layer of cords embedded in rubber.

[0014] This invention provides a puncture-proof and puncture-proof bicycle tire, comprising, from the inside out, a carcass ply, a steel cord ply, and a tread compound. When punctured by a sharp object, the tread compound of this puncture-proof and puncture-proof bicycle tire provides initial protection. If the object penetrates to the steel cord ply, its high-strength steel wire weave structure disperses the impact force through a mesh-like structure. Simultaneously, the rigidity of the steel wire directly prevents further penetration, avoiding contact with and damage to the inner layers, thus achieving puncture-proof and puncture-proof functions. Furthermore, the steel cord ply can also constrain excessive deformation of the tire crown after inflation, improving tire stability. Therefore, the puncture-proof and puncture-proof bicycle tire of this invention significantly improves puncture and puncture resistance while maintaining a comfortable riding experience. Meanwhile, the fatigue resistance of the steel cord layer in the puncture-proof and explosion-proof bicycle tire of the present invention is far superior to that of the composite polymer puncture-proof layer in the prior art. After long-term use, the puncture resistance decay rate is less than 5% (compared to ≥20% in the prior art), and the puncture resistance rate against high-strength sharp objects such as nails can reach more than 95%, greatly improving explosion-proof safety. At the same time, the steel cord layer can simultaneously enhance the rigidity of the tire crown, reduce tread deformation during driving, and make the tire-ground contact area more stable, indirectly improving braking performance and wear resistance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the puncture-proof and explosion-proof bicycle tire of the present invention, wherein 1 is the tread rubber, 2 is the steel cord layer, 3 is the multi-layer tire carcass cord layer, and 4 is the steel wire ring. Figure 2 This is a physical image showing the puncture-resistant and explosion-proof bicycle tire described in Embodiment 1 of the present invention. Detailed Implementation

[0016] like Figure 1 As shown, the present invention provides a puncture-proof and explosion-proof bicycle tire, comprising a tire carcass ply, a steel cord ply, and a tread rubber layer arranged sequentially from the inside out.

[0017] As an embodiment of the present invention, the steel cord ply does not completely cover the carcass ply, but continuously covers the entire crown area in a ring.

[0018] As an embodiment of the present invention, the included angle between the two sides of the steel cord fabric layer and the two sides of the center line of the tire crown is ≤45°, preferably 45°.

[0019] In one embodiment of the present invention, the steel wire cord layer coincides with the contact surface of the puncture-proof and explosion-proof bicycle tire in the thickness direction.

[0020] In one embodiment of the present invention, the steel cord ply is bonded to the carcass ply and the tread compound by adhesive bonding, and there is no relative displacement between the steel cord ply and the carcass ply and the tread compound. The present invention does not impose any special limitations on the adhesive used for bonding; any high-temperature resistant adhesive well-known to those skilled in the art can be used.

[0021] In one embodiment of the present invention, the angle between the weaving angle of the steel wires in the steel cord layer and the tire circumference is 30-45°. Controlling the angle between the weaving angle of the steel wires in the steel cord layer and the tire circumference within the above range can balance the puncture resistance and tire elasticity of the self-propelled tire.

[0022] As an embodiment of the present invention, the thickness of the steel wire cord layer is 0.5~0.8mm, preferably 0.5mm, 0.6mm, 0.7mm or 0.8mm.

[0023] In this invention, the steel wire cord fabric layer only needs the above-mentioned thickness range (thinner thickness) to achieve the stab-proof effect of the existing 3-4mm composite polymer stab-proof layer, and its strength is 5-8 times that of the composite polymer stab-proof layer of the same thickness.

[0024] In one embodiment of the present invention, the steel wire cord layer is replaced with a mixed cord layer of aramid and steel wire or a composite cord layer of steel wire and nylon interwoven. The aramid fiber has high strength and lightweight characteristics, and when mixed with steel wire, the weight can be further reduced while maintaining puncture resistance, but the cost will increase by 20% to 30%. The composite cord layer of steel wire and nylon interwoven uses the elasticity of nylon fiber to compensate for the excessive rigidity of steel wire, improving riding comfort, but the puncture resistance is reduced by about 10% compared to the steel wire cord layer.

[0025] As an embodiment of the present invention, the puncture-proof and explosion-proof bicycle tire further includes a steel wire ring; the steel wire ring is located in the annular area where the puncture-proof and explosion-proof bicycle tire contacts the wheel hub.

[0026] In one embodiment of the present invention, the carcass ply is composed of more than one layer of cords embedded in rubber. The present invention does not impose any particular limitation on the specific number of cord layers in the carcass ply; any number known to those skilled in the art can be used.

[0027] In this invention, the puncture-proof and blast-proof bicycle tires are more suitable for scenarios with high puncture resistance requirements, such as mountain bikes and long-distance commuter bikes, but not for racing-grade road bikes that pursue extreme lightweight design. Furthermore, the puncture-proof and blast-proof bicycle tires can be mass-produced simply by adding a "steel cord layer bonding station" to existing tire production lines, without requiring modifications to core equipment, demonstrating strong process compatibility.

[0028] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] Example 1 like Figure 1 As shown, the puncture-proof and explosion-proof bicycle tire consists of multiple layers of tire carcass ply (three layers in the thickness direction of the tread rubber and two layers in other positions), steel cord ply, and tread rubber, arranged sequentially from the inside out. The angle between the two sides of the steel cord layer and the two sides of the tire crown centerline is 45°, and the steel cord layer coincides with the contact surface of the puncture-proof and explosion-proof bicycle tire in the thickness direction. The steel cord fabric layer is bonded to the carcass cord layer and the tread rubber respectively by means of high temperature resistant adhesive, and there is no relative displacement between the steel cord fabric layer and the carcass cord layer and the tread rubber. The angle between the weaving angle of the steel wires in the steel cord layer and the circumferential direction of the tire is 45°. The thickness of the steel wire cord fabric layer is 0.8 mm; The puncture-proof and explosion-proof bicycle tire also includes a steel wire ring; the steel wire ring is located in the annular area where the puncture-proof and explosion-proof bicycle tire contacts the wheel hub.

[0030] Test case The puncture-proof and explosion-proof bicycle tire described in Example 1 was installed on a bicycle rim (rim model 26X1.95). An adult weighing 90kg rode the bicycle at a speed of 5km / h and ran over a nail plate (steel nail diameter 3mm, steel nail density 30×30) repeatedly 10 times. The test results are as follows. Figure 2 As shown, by Figure 2It can be seen that the puncture-proof and explosion-proof bicycle was intact and not punctured.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A puncture and explosion-proof bicycle tire characterized by, The tire body ply, the steel cord ply and the tread rubber are sequentially arranged from inside to outside.

2. The anti-puncture, anti-explosion bicycle tire according to claim 1, characterized in that, The steel cord ply does not completely cover the tire body ply and is annular and continuously covers the entire crown area.

3. The anti-puncture, anti-explosion bicycle tire according to claim 2, characterized in that, The angle between the two sides of the steel cord ply and the two sides of the crown center line is ≤45°.

4. The anti-puncture, anti-explosion bicycle tire according to claim 3, characterized in that, The steel cord ply and the landing surface of the anti-puncture and anti-explosion bicycle tire coincide in the thickness direction.

5. The anti-puncture, anti-explosion bicycle tire according to claim 3, characterized in that, The thickness of the steel cord ply is 0.5-0.8 mm.

6. The anti-puncture, anti-explosion bicycle tire according to claim 4, characterized in that, The angle between the weaving angle of the steel wire in the steel cord ply and the tire circumferential direction is 30-45°.

7. The anti-puncture, anti-explosion bicycle tyre according to any of claims 1 to 6, characterized in that, The steel cord ply is attached to the tire body ply and the tread rubber by gluing.

8. The anti-puncture, anti-explosion bicycle tire according to claim 1, characterized in that, The steel cord ply is replaced by a mixed ply of aramid and steel wire or a composite ply of steel wire and nylon interwoven with nylon.

9. The anti-puncture, anti-explosion bicycle tire according to claim 1, characterized in that, A bead is further included. The bead is located in the annular area where the anti-puncture and anti-explosion bicycle tire contacts the hub.

10. The anti-puncture, anti-explosion bicycle tire according to claim 1, characterized in that, The tire body ply is composed of >1 layer of cord embedded in rubber.

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