Anti-puncturing noise-reducing tire and preparation method thereof

Abstract

The invention provides an anti-pricking noise-reducing tire and a preparation method thereof, and relates to the technical field of tires, the anti-pricking noise-reducing tire comprises a tire main body composed of a hub and an outer tire, a cavity is formed between the hub and the outer tire, and the anti-pricking noise-reducing tire further comprises an elastic anti-pricking layer and a self-repairing layer; through the arrangement of the rubber buffer ring, the metal microporous net, the anti-impact layer and the like, the protection layer capable of flexibly changing is arranged in the tire, after the spines penetrate through the outer tire, the flexible protection layer deforms along with the movement tracks of the spines and wraps the spines, and the tire cannot leak air; and aiming at the impact force caused by the spines to the elastic anti-puncturing layer, the anti-impact liquid in the anti-impact layer is instantly changed into a solid-like state from a liquid state, so that hard support is provided for the metal microporous net and the impact force is absorbed, and the anti-puncturing property of the tire is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of puncture-proof and noise-reducing tires, in particular to a puncture-proof and noise-reducing tire and a preparation method thereof. Background Art

[0002] As consumers' demands for the safety and comfort of automobile products continue to increase, and the new energy vehicle market develops rapidly, tires equipped with advanced features are becoming more and more popular. Therefore, most automobile manufacturers will basically develop and promote high-performance tires with functions such as puncture protection and noise reduction.

[0003] The Chinese patent with application number CN202121446441.6 discloses a nanomaterial-filled puncture-proof tire, a tire body composed of a wheel hub and a carcass, the carcass consisting of an outer tire and an inner tire arranged inside the outer tire and sleeved on the outer surface of the wheel hub, a cavity one is opened inside the outer tire, and a carcass protection rubber layer is installed on the inner wall of the cavity one, the carcass protection rubber layer is wrapped around the outside of the anti-puncture unit, and the anti-puncture unit is configured to prevent air leakage caused by nails piercing during the driving of the tire body; by arranging the anti-puncture unit for use in conjunction with the protective part, the metal mesh plate layer one and the metal mesh plate layer two can play a preliminary anti-puncture effect, the polymer anti-puncture protection layer can wrap the stator when the nail pierces, and play a good sealing and protection effect, the rubber plate is combined with the metal chain plate layer to form the protective part, and the metal chain plate layer is used to play a secondary anti-puncture effect, which can ensure the good anti-puncture characteristics of the tire body and effectively prevent the tire from being punctured.

[0004] The Chinese patent with application number CN202322972595.4 discloses an anti-puncture and air-leakage noise-reducing tire, including a tire main body, a memory rubber layer is adhered to the inner side corresponding to the outer working surface of the tire main body, the memory rubber layer is a sticky soft hot-melt rubber layer, and a shock-absorbing and noise-reducing middle cushion layer with an elastic foaming structure is adhered to the inner side of the memory rubber layer. The middle cushion layer is bonded to the memory rubber layer and has a tensile force on the memory rubber layer in the opposite direction of the deformation and stretching direction of the memory rubber layer. The memory rubber layer is arranged in the tire main body. When a foreign object is inserted into the tire, the memory rubber layer will wrap the foreign object in all directions in time to form an air leakage safety protection zone to prevent gas leakage in the tire main body, and a shock-absorbing and noise-reducing middle cushion layer with an elastic foaming structure is adhered on the memory rubber layer, which can tighten the stretched memory rubber layer to prevent leakage and can also reduce the noise generated by the friction between the tire and the ground and the friction vibration of foreign objects, thereby reducing the safety hazards of driving and the discomfort caused by noise.

[0005] The existing puncture-proof and noise-reducing tires still have the following problems: 1. Existing run-flat tires prevent blowouts by reinforcing the inner liner, but this method has poor puncture-proof performance. Although it prevents blowouts, the tire will still be punctured when encountering thorns. Some tires are provided with a non-Newtonian fluid layer inside to cushion the thorns that penetrate the tire according to the characteristics of the non-Newtonian fluid. However, since the ends of the thorns are very sharp, the effect of the non-Newtonian fluid layer directly cushioning the ends is very limited, and it is very easy for the non-Newtonian fluid layer to be directly penetrated.

[0006] 2. When the spikes are fixed on the ground, after the tire is pierced, the spikes do not move with the tire. For smaller wounds, such as small and uniform wounds like nails, the wounds can be repaired by the air pressure inside the tire, and there will be no large amount of air leakage. However, for larger wounds, such as spikes like glass fragments or ceramic fragments, the repair effect will decrease and the repair time will be longer. At this time, as the internal pressure of the tire continues to decrease, the repair effect of the sealant on the wound will become worse. Summary of the invention

[0007] In view of the above problems, the present invention provides a puncture-proof and noise-reducing tire and a preparation method thereof, which has excellent puncture-proof and noise-reducing effects.

[0008] The technical solution is that the present invention comprises a tire body consisting of a wheel hub and a tire, a cavity is formed between the wheel hub and the tire, and further comprises: An elastic puncture-proof layer is arranged in the cavity, the elastic puncture-proof layer is an annular structure and its outer edge is fixedly connected to the inner wall of the outer tire. When the spike penetrates the outer tire and contacts the elastic puncture-proof layer, the elastic puncture-proof layer generates elastic deformation and wraps the spike; The self-repairing layer is an annular structure and is coaxially fixed with the inner ring of the elastic anti-puncture layer. A sealant is arranged inside the self-repairing layer. When the spike penetrates the elastic anti-puncture layer and the self-repairing layer, the sealant inside thereof repairs the hole under the action of the tire pressure.

[0009] Preferably, the elastic puncture-proof layer comprises a rubber buffer ring in contact with the inner wall of the outer tire, and a metal microporous mesh is fixedly connected to the side of the rubber buffer ring away from the outer tire.

[0010] Preferably, a gap is formed between the rubber buffer ring and the inner wall of the outer tire to prevent the rubber buffer ring from fitting too closely to the outer tire and affecting the deformation of the elastic anti-puncture layer.

[0011] Preferably, a side of the metal microporous mesh away from the rubber buffer ring is fixedly connected with an impact-resistant layer, the impact-resistant layer is made of rubber material and has an annular cavity, and an impact-resistant liquid is arranged inside the annular cavity.

[0012] Preferably, a plurality of circumferentially evenly distributed partition bars are arranged inside the annular cavity, and the plurality of circumferentially evenly distributed partition bars divide the annular cavity into a plurality of circumferentially evenly distributed unit cavities, and the anti-shock liquid is located inside the plurality of unit cavities.

[0013] Preferably, the self-repairing layer comprises two coaxially arranged rubber outer rings and rubber inner rings, the interiors of the rubber outer rings and rubber inner rings are respectively provided with a plurality of circumferentially evenly distributed repair cavities, the repair cavities of the rubber outer rings and rubber inner rings are staggered and partially overlapped, and the sealant is arranged in the repair cavity.

[0014] Preferably, a movable isolation membrane is provided on the inner wall of the plurality of repair cavities, the sealant is located inside the isolation membrane, air storage cavities are respectively provided on both sides of the repair cavity, a through groove is provided between the air storage cavity and the repair cavity, and compressed gas is provided inside the air storage cavity for extruding the sealant.

[0015] Preferably, the tire includes a carcass and a sidewall, the carcass is in direct contact with the ground, the transition zone between the carcass and the sidewall is a shoulder, the cross-section of the shoulder is an arc-shaped structure, and the multiple air storage cavities are located on the inner side of the shoulder. When the tire contacts the ground and causes the shoulders on both sides to deform, the shoulders squeeze the adjacent air storage cavities.

[0016] Preferably, it also includes a noise reduction mechanism, which is coaxially arranged at the inner circle of the self-repairing layer, and the noise reduction mechanism includes an annular frame, on which a plurality of arc-shaped sound-absorbing cottons evenly distributed around the circumference are arranged; The annular frame includes two symmetrically distributed annular metal bars, the diameter of the annular metal bars is consistent with the inner diameter of the self-repairing layer, and a plurality of circumferentially evenly distributed connecting bars are fixed on the two annular metal bars. A placement groove is formed between two adjacent connecting bars and the two annular metal bars, and a plurality of arc-shaped sound-absorbing cottons are respectively fixedly connected in the corresponding placement grooves. The annular metal bars and the connecting bars are made of stainless steel.

[0017] A method for preparing a puncture-proof and noise-reducing tire comprises the following steps: Step 1: Before the tire body is vulcanized and formed, an elastic anti-puncture layer is installed on the tire. The specific steps are as follows: S101: preheating the metal microporous mesh, and then bonding and fixing the rubber buffer ring, the metal microporous mesh and the impact-resistant layer in sequence by means of a high-temperature resistant adhesive; S102: injecting anti-shock liquid into multiple unit cavities of the anti-shock layer, and immediately sealing the injection port with a hot melt tool after each injection. After all injections are completed, an elastic anti-puncture layer is obtained; S103: installing an elastic puncture-proof layer on the inner wall of the outer tire, wherein the outer edge of the elastic puncture-proof layer is bonded and fixed to the inner wall of the outer tire by a high temperature resistant adhesive, and a gap is left between the elastic puncture-proof layer and the outer tire; Step 2: Install a self-repairing layer on the basis of the elastic anti-puncture layer. The specific steps are as follows: S201: The rubber outer ring and the rubber inner ring are bonded and fixed by a high temperature resistant adhesive, and the repair cavities of the rubber outer ring and the rubber inner ring are arranged alternately; S202: injecting sealant into the repair cavity of the rubber outer ring and the rubber inner ring, and immediately sealing the injection port with a hot melt tool after each injection is completed. After all injections are completed, a self-repairing layer is obtained; S203: bonding and fixing the self-repairing layer and the elastic puncture-proof layer by means of a high-temperature resistant adhesive to obtain a finished tire product; Step 3: vulcanizing and molding the tire semi-finished product to obtain a tire finished product; Step 4: Install a noise reduction mechanism in the finished tire. The specific steps are as follows: S401: fixing a plurality of arc-shaped sound-absorbing cottons in a plurality of placement grooves of the ring frame in sequence; S402: The annular frame is coaxially placed in the outer tire so that the annular frame contacts the self-repairing layer.

[0018] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: 1. A flexible protective layer is set inside the tire through the settings of rubber buffer ring, metal microporous mesh and impact-resistant layer. When the spike penetrates the outer tire, the flexible protective layer deforms along the movement trajectory of the spike to wrap the spike, and the tire will not have air leakage problems; at the same time, the elastic anti-puncture layer and the impact-resistant layer cooperate to form a double-layer protection effect. The elastic anti-puncture layer serves as the first barrier to prevent punctures. It is mainly used to absorb the impact force of the spikes and provide protection for the subsequent impact-resistant layer to prevent the end of the spike from directly acting on the impact-resistant layer, and expand the force-bearing surface of the impact-resistant layer, so that more impact-resistant liquid inside the impact-resistant layer changes its shape, further improving the anti-puncture effect of the tire.

[0019] 2. Through the settings of rubber outer ring, rubber outer ring and sealant, a self-repairing layer is added on the basis of improving the puncture resistance of the tire. Different from the conventional self-repairing method, the sealant is set inside the rubber ring, and the sealants in the two rubber rings are staggered to avoid repair dead corners. When repairing the tire later, the rubber inner ring can be directly polished and patched, which makes the repair faster.

[0020] 3. Through the settings of the air storage cavity, isolation membrane and through grooves, when glass fragments or ceramic fragments penetrate the self-repairing layer and cause a large irregular wound, and the spikes do not move with the tire, the gas inside the tire will quickly leak out from the wound. After the isolation membrane is penetrated, the sealant inside it moves toward the wound under the action of the internal air pressure of the tire. At the same time, since the compressed gas inside the air storage cavity always squeezes the isolation membrane, the flow speed of the sealant to the wound is accelerated, thereby improving the repair effect of the self-repairing layer; not only that, every time the tire rotates a circle, the shoulders on both sides of the outer tire contact the ground and deform, and the air storage cavity is squeezed. During the movement of the vehicle, the continuous rotation of the tire causes the air storage cavity to form a pulsed extrusion force on the sealant, further increasing the flow speed of the sealant.

[0021] 4. The conventional tire noise reduction structure uses sound-absorbing cotton fixed on the inner wall of the tire through the settings of arc-shaped sound-absorbing cotton, annular metal strips and connecting strips. However, when this noise reduction structure is combined with the conventional self-repairing layer, it will make the tire more difficult to repair and patch. In order to make the noise reduction mechanism have better flexibility, combined with the special structure of the above-mentioned self-repairing layer, a quick-release noise reduction mechanism is adopted. When the tire is repaired later, the noise reduction structure can be quickly removed without causing trouble to the repairing workers. At the same time, since the annular frame has a certain elasticity, the annular frame can also provide a certain hard support for the elastic anti-puncture layer, thereby improving the anti-puncture effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0023] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the tire and the elastic puncture-proof layer in the present invention.

[0024] Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 4 It is a schematic diagram of the explosion of the elastic anti-puncture layer in the present invention.

[0026] Figure 5 It is a planar cross-sectional view of the tire and the self-repairing layer in the present invention.

[0027] Figure 6 The present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0028] Figure 7 It is a partial cross-sectional view of the self-repairing layer in the present invention.

[0029] Figure 8 The present invention Figure 7 Enlarged schematic diagram of the structure at C in the middle.

[0030] Fig. 9 It is an exploded schematic diagram of the noise reduction mechanism and the tire body in the present invention.

[0031] Fig.10 It is an exploded schematic diagram of the noise reduction mechanism in the present invention.

[0032] Explanation of the symbols in the schematic diagram: 1. Wheel hub; 2. Outer tire; 3. Tire body; 4. Cavity; 5. Elastic anti-puncture layer; 6. Self-repairing layer; 7. Rubber buffer ring; 8. Metal microporous mesh; 9. Impact-resistant layer; 10. Unit cavity; 11. Rubber outer ring; 12. Rubber inner ring; 13. Repair cavity; 14. Air storage cavity; 15. Through groove; 16. Tire body; 17. Sidewall; 18. Shoulder; 19. Ring frame; 20. Arc-shaped sound-absorbing cotton; 21. Ring-shaped metal strip; 22. Connecting strip. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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 those skilled in the art without creative work are within the scope of protection of the present invention. Example 1

[0034] Existing run-flat tires prevent blowouts by reinforcing the inner liner, but this method has poor puncture-proof performance. Although it prevents blowouts, it will still be punctured when encountering thorns. Some tires are provided with a non-Newtonian fluid layer inside to cushion the thorns that penetrate the tire according to the characteristics of the non-Newtonian fluid. However, since the ends of the thorns are very sharp, the effect of the non-Newtonian fluid layer directly cushioning the ends is very limited, and the phenomenon of directly penetrating the non-Newtonian fluid layer is very likely to occur. This embodiment is specially invented to solve the above problems.

[0035] Depend on Figures 1 to 4 A tire body 3 is shown, which includes a wheel hub 1 and a tire outer tire 2, a cavity 4 is formed between the wheel hub 1 and the tire outer tire 2, and an elastic puncture-proof layer 5 and a self-repairing layer 6: The elastic puncture-proof layer 5 is arranged in the cavity 4. The elastic puncture-proof layer 5 is an annular structure and its outer edge is fixedly connected to the inner wall of the outer tire 2. When the spike penetrates the outer tire 2 and contacts the elastic puncture-proof layer 5, the elastic puncture-proof layer 5 generates elastic deformation and wraps the spike. The self-repairing layer 6 is an annular structure and is coaxially fixed with the inner ring of the elastic anti-puncture layer 5. A sealant is arranged inside the self-repairing layer 6. When the spike penetrates the elastic anti-puncture layer 5 and the self-repairing layer 6, the sealant inside repairs the hole under the action of the tire pressure.

[0036] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, to further supplement the layered structure of the elastic anti-puncture layer 5, the elastic anti-puncture layer 5 includes a rubber buffer ring 7 in contact with the inner wall of the outer tire 2. The material of the rubber buffer ring 7 is mainly styrene-butadiene synthetic rubber, which has good flexibility and wear resistance. It is mainly copolymerized by butadiene and styrene. This is also one of the most commonly used general synthetic rubbers. No further details are given here. The rubber buffer ring 7 is fixedly connected to a metal microporous mesh 8 on the side away from the outer tire 2. As the name suggests, the metal microporous mesh 8 is a metal material with many tiny holes, specifically a porous plate. The metal microporous mesh 8 is made of stainless steel and has a thickness of 0.8 mm. When the spikes penetrate the outer tire 2, the rubber buffer ring 7 and the metal microporous mesh 8 block the spikes to prevent the tire from being directly penetrated and causing air leakage.

[0037] refer to Figure 3 As shown, it is further supplemented that a gap is formed between the rubber buffer ring 7 and the inner wall of the outer tire 2 to prevent the rubber buffer ring 7 from being closely attached to the outer tire 2 and affecting the deformation of the elastic anti-puncture layer 5.

[0038] Please refer to Figures 2 to 4 As shown, the metal microporous mesh 8 is fixedly connected to an impact-resistant layer 9 on one side away from the rubber buffer ring 7. The impact-resistant layer 9 is made of rubber and has an annular cavity. The interior of the annular cavity is provided with an impact-resistant liquid. The impact-resistant liquid is a non-Newtonian fluid, such as polyethylene, polyacrylamide, polyvinyl chloride and other polymer solutions. When the impact-resistant layer 9 is subjected to a large impact force, part of the impact-resistant liquid becomes very viscous, and even temporarily exhibits solid properties, thereby providing rigid support for the metal microporous mesh 8 and absorbing the impact force.

[0039] At the same time, in order to prevent the sharp thorns from puncturing the impact-resistant layer 9, causing a large outflow of impact-resistant liquid, which may adhere to the tread of the outer tire 2, thereby reducing the friction between the tire and the ground and posing certain safety issues, a plurality of circumferentially evenly distributed spacers are arranged inside the annular cavity. The plurality of spacers divide the annular cavity into a plurality of circumferentially evenly distributed unit cavities 10, and the impact-resistant liquid is located inside the plurality of unit cavities 10.

[0040] During use, when the vehicle is suddenly punctured by a sharp thorn while driving, the thorn penetrates the outer tire 2 and contacts the elastic anti-puncture layer 5, and the elastic anti-puncture layer 5 is deformed. As the sharp thorn continues to penetrate deeper, the sharp thorn penetrates the rubber buffer ring 7 and contacts the metal microporous mesh 8. Since it happens very quickly, the impact-resistant liquid instantly changes from liquid to a solid-like state, thereby providing rigid support for the metal microporous mesh 8 and absorbing the impact force.

[0041] It should be noted that the impact-resistant layer 9 and the metal microporous mesh 8 form a double-layer impact-resistant effect. When the end of the spike contacts the metal microporous mesh 8, the metal microporous mesh 8 is deformed and acts on the impact-resistant layer 9. At this time, the impact-resistant layer 9 is affected by a larger surface, causing more non-Newtonian fluid inside the impact-resistant layer 9 to change its shape, instantly changing from a liquid state to a solid-like state; preventing the end of the spike from directly acting on the impact-resistant layer 9, thereby improving the buffering effect of the impact-resistant layer 9.

[0042] To sum up, a flexible protective layer is arranged inside the tire through the rubber buffer ring 7, the metal microporous mesh 8 and the impact-resistant layer 9. When the spike penetrates the outer tire 2, the flexible protective layer deforms along the movement trajectory of the spike to wrap the spike, and the tire will not have air leakage problems; at the same time, the elastic anti-puncture layer 5 and the impact-resistant layer 9 cooperate to form a double-layer protection effect. The elastic anti-puncture layer 5 serves as the first barrier to prevent punctures. It is mainly used to absorb the impact force of the spikes and provide protection for the subsequent impact-resistant layer 9, which not only avoids the end of the spike from directly acting on the impact-resistant layer 9, but also produces a better anti-puncture effect because the action surface of the impact-resistant layer 9 becomes larger, thereby further improving the puncture resistance of the tire. Example 2

[0043] After the elastic anti-puncture layer 5 is provided, since the metal microporous mesh 8 is adopted inside the elastic anti-puncture layer 5, it can produce a better blocking effect on larger spikes. However, when the spikes move with the tire, the spikes are always in contact with the metal anti-puncture layer. At the same time, the air pressure inside the tire increases the contact force between the metal anti-puncture layer and the spikes. Especially when the vehicle is traveling on a bumpy or stone-filled road, it is easy for the spikes to penetrate the elastic anti-puncture layer 5. In addition, for small spikes such as nails, the nails can easily pass directly through the micropores to puncture the tire. Further improvements are made on the basis of the above embodiment.

[0044] Please refer to Figures 5 to 8As shown, the elastic puncture-proof layer 5 is fixedly connected to a self-repairing layer 6 on one side away from the outer tire 2, and a sealant is arranged in the self-repairing layer 6. Since the common tire self-repairing method is to apply a layer of special sealant on the inner wall of the tire, this layer of sealant remains liquid under normal circumstances. When the tire is punctured by a nail or other sharp object, the sealant will flow around the puncture object and fill around the puncture. Once the puncture object is removed, the sealant will quickly solidify, seal the puncture, and prevent air leakage. However, when repairing the tire in this way, the sealant needs to be manually scraped off, and the repair process is very troublesome, and even the traditional tire repair method cannot be used. Therefore, it is further supplemented to the structure of the self-repairing layer 6 that the self-repairing layer 6 includes two coaxially arranged rubber outer rings 11 and rubber inner rings 12, and a plurality of circumferentially evenly distributed repair cavities 13 are respectively opened inside the rubber outer ring 11 and the rubber inner ring 12. The repair cavities 13 of the rubber outer ring 11 and the rubber inner ring 12 are staggered and partially overlapped. The sealant is arranged in the repair cavity 13, and the sealant is a synthetic rubber-based material.

[0045] During use, when the spike penetrates the self-repairing layer 6, the sealant inside the rubber ring flows around the spike. After the spike is pulled out, the sealant solidifies and seals the hole to prevent gas leakage.

[0046] To sum up, by configuring the rubber outer ring 11, the rubber outer ring 11 and the sealant, a self-repairing layer 6 is added on the basis of improving the puncture resistance of the tire. Different from the conventional self-repairing method, the sealant is arranged inside the rubber ring, and the sealants in the two rubber rings are staggered to avoid repair dead corners. When the tire is repaired later, the rubber inner ring 12 can be directly polished and patched, and the repair is faster. Example 3

[0047] When the spike is fixed on the ground and the tire is penetrated, the spike does not move with the tire. For smaller wounds, such as small and uniform wounds caused by nails, the wounds can be repaired by the air pressure in the tire without a large amount of air leakage. However, for larger wounds, such as glass fragments or ceramic fragments, the repair effect will decrease and the repair time will be longer. At this time, as the internal pressure of the tire continues to decrease, the repair effect of the sealant on the wound will become worse. Improvements are made based on the above embodiments.

[0048] refer to Figures 6 to 8 As shown, a movable isolation membrane is provided on the inner wall of the plurality of repair cavities 13, and the sealant is located inside the isolation membrane. Air storage cavities 14 are respectively provided on both sides of the repair cavity 13, and a through groove 15 is provided between the air storage cavity 14 and the repair cavity 13. Compressed gas is provided inside the air storage cavity 14 for squeezing the sealant.

[0049] refer to Figure 6As shown, the outer tire 2 includes a carcass 16 and a sidewall 17. The carcass 16 is in direct contact with the ground. The transition area between the carcass 16 and the sidewall 17 is a shoulder 18. The cross-section of the shoulder 18 is an arc-shaped structure. Multiple air storage cavities 14 are located on the inner side of the shoulder 18. When the outer tire 2 is in contact with the ground and the shoulders 18 on both sides are deformed, the shoulders 18 squeeze the adjacent air storage cavities 14.

[0050] When a vehicle tire is penetrated by a sharp object, there are two situations according to the behavior of the sharp object: The spike moves with the tire: In this case, a slender object such as a nail is embedded in the tire and rotates with it. At this time, the fluidity of the sealant is not required to be high, because as the tire rotates, the sealant will gradually cover and seal the wound to prevent air leakage.

[0051] Spikes fixed to the ground: When sharp objects such as nails or other small and uniform objects are fixed to the ground and only penetrate the tire without moving with it, smaller wounds can be self-repaired by the air pressure inside the tire, avoiding significant air leakage; however, for larger wounds, such as irregular damage caused by glass or ceramic fragments, the repair effect is significantly reduced and the repair process is slower; and as the internal pressure of the tire continues to decrease, the effectiveness of the sealant on large wounds will also weaken, making repair more difficult.

[0052] During use, the gas inside the gas storage chamber 14 always squeezes the two sides of the isolation membrane. Under normal working conditions, the isolation membrane isolates the sealant from the compressed gas. The purpose of this setting is, on the one hand, to make the sealant more fluid under the action of pressure on both sides, and will not adhere to the inner wall of the repair cavity 13, thereby increasing the repair speed of the wound; on the other hand, it prevents the compressed gas from mixing with the sealant, so that the compressed gas only increases the lateral thrust on the sealant.

[0053] When a larger spike such as glass fragments or ceramic fragments penetrates the self-repairing layer 6, the sealant is subjected to pressure from two directions at the same time. The two pressures are the pressure of the gas leaking outward from the tire and the squeezing force of the air storage chamber 14 on both sides of the sealant. The sealant quickly wraps around the spike under the squeezing of the gas on both sides.

[0054] In summary, through the arrangement of the air storage cavity 14, the isolation membrane and the through groove 15, when glass fragments or ceramic fragments penetrate the self-repairing layer 6 and cause a large irregular wound, and the spikes do not move with the tire, the gas inside the tire quickly leaks out from the wound. After the isolation membrane is penetrated, the sealant inside it moves toward the wound under the action of the air pressure inside the tire. At the same time, since the compressed gas inside the air storage cavity 14 always squeezes the isolation membrane, the flow speed of the sealant to the wound is accelerated, thereby improving the repair effect of the self-repairing layer 6. Moreover, every time the tire rotates one circle, the shoulders 18 on both sides of the outer tire 2 come into contact with the ground and deform, and the air storage chamber 14 is squeezed. During the movement of the vehicle, the continuous rotation of the tire causes the air storage chamber 14 to form a pulsed squeezing force on the sealant, further increasing the flow rate of the sealant. Example 4

[0055] Conventional noise reduction tires have a ring of sound-absorbing cotton bonded to the inner ring of the outer tire 2 to process the noise of the cavity 4 in the tire. It is not convenient to repair the tire. Further improvements are made on the basis of the above embodiment.

[0056] refer to Fig. 9 and Fig.10 As shown, the tire also includes a noise reduction mechanism, which is coaxially arranged at the inner circle of the self-repairing layer 6. The noise reduction mechanism includes an annular frame 19, on which a plurality of arc-shaped sound-absorbing cottons 20 evenly distributed around the circumference are arranged. The arc-shaped sound-absorbing cottons 20 have an open porous structure. When sound waves pass through these pores, they interact with the fibers inside the material, thereby reducing the noise of the tire cavity 4. To further supplement the structure of the annular frame 19, the annular frame 19 includes two symmetrically distributed annular metal bars 21, the diameter of the annular metal bar 21 is consistent with the inner diameter of the self-repairing layer 6, and a plurality of circumferentially evenly distributed connecting bars 22 are fixed on the two annular metal bars 21. A placement groove is formed between two adjacent connecting bars 22 and the two annular metal bars 21, and a plurality of the arc-shaped sound-absorbing cottons 20 are respectively fixedly connected in the corresponding placement grooves. The material of the annular metal bar 21 is stainless steel with a thickness of 1 mm, and the material of the connecting bar 22 is stainless steel with a thickness of 3 mm. The stainless steel material has good ductility at room temperature.

[0057] During use, workers fix multiple arc-shaped sound-absorbing cottons 20 in the corresponding placement grooves in sequence. Before fixing the outer tire 2 and the wheel hub 1, the annular frame 19 is placed coaxially with the outer tire 2, and the annular frame 19 is in contact with the self-repairing layer 6. Finally, the outer tire 2 and the wheel hub 1 are installed.

[0058] In summary, the noise reduction mechanism has better flexibility through the arrangement of the arc-shaped sound-absorbing cotton 20, the annular metal strip 21 and the connecting strip 22. When the tire is subsequently repaired, the noise reduction structure can be quickly removed without causing trouble to the workers. At the same time, since the annular frame 19 has a certain elasticity, the annular frame 19 can also provide a certain rigid support for the elastic anti-puncture layer 5, thereby improving the anti-puncture effect.

[0059] A method for preparing a puncture-proof and noise-reducing tire comprises the following steps: Step 1: Before the tire body 3 is vulcanized and formed, an elastic puncture-proof layer 5 is installed on the tire casing 2. The specific steps are as follows: S101: preheating the metal microporous mesh 8, and then bonding and fixing the rubber buffer ring 7, the metal microporous mesh 8 and the impact-resistant layer 9 in sequence by means of a high-temperature resistant adhesive; S102: injecting anti-shock liquid into the multiple unit cavities 10 of the anti-shock layer 9, and immediately sealing the injection port with a hot melt tool after each injection. After all injections are completed, the elastic anti-puncture layer 5 is obtained; S103: installing an elastic puncture-proof layer 5 on the inner wall of the outer tire 2, wherein the outer edge of the elastic puncture-proof layer 5 is bonded and fixed to the inner wall of the outer tire 2 by a high temperature resistant adhesive, and a gap is left between the elastic puncture-proof layer 5 and the outer tire 2; Step 2: Add a self-repairing layer 6 on the basis of the elastic anti-puncture layer 5. The specific steps are as follows: S201: The rubber outer ring 11 and the rubber inner ring 12 are bonded and fixed by a high temperature resistant adhesive, and the repair cavities 13 of the rubber outer ring 11 and the rubber inner ring 12 are arranged alternately; S202: injecting sealant into the repair cavity 13 of the rubber outer ring 11 and the rubber inner ring 12, and immediately sealing the injection port with a hot melt tool after each injection. After all injections are completed, a self-repairing layer 6 is obtained; S203: The self-repairing layer 6 and the elastic puncture-proof layer 5 are bonded and fixed by a high-temperature resistant adhesive to obtain a finished tire product; Step 3: vulcanizing and molding the tire semi-finished product to obtain a tire finished product; Step 4: Install a noise reduction mechanism in the finished tire. The specific steps are as follows: S401: fixing a plurality of arc-shaped sound-absorbing cottons 20 in a plurality of placement grooves of the annular frame 19 in sequence; S402: The annular frame 19 is coaxially placed in the outer tire 2 so that the annular frame 19 contacts the self-repairing layer 6 .

[0060] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A puncture-proof and noise-reducing tire, comprising a tire body (3) composed of a wheel hub (1) and a tire casing (2), wherein a cavity (4) is formed between the wheel hub (1) and the tire casing (2), and characterized in that: Also includes: An elastic puncture-proof layer (5), the elastic puncture-proof layer (5) being arranged in the cavity (4), the elastic puncture-proof layer (5) being an annular structure and having an outer edge fixedly connected to the inner wall of the outer tire (2), and when the spike penetrates the outer tire (2) and contacts the elastic puncture-proof layer (5), the elastic puncture-proof layer (5) generates elastic deformation and wraps around the spike; The self-repairing layer (6) is an annular structure and is coaxially fixed with the inner ring of the elastic puncture-proof layer (5). A sealant is provided inside the self-repairing layer (6). When the spike penetrates the elastic puncture-proof layer (5) and the self-repairing layer (6), the sealant inside the self-repairing layer (6) repairs the hole under the action of the tire pressure.

2. The puncture-resistant and noise-reducing tire according to claim 1, characterized in that: The elastic puncture-proof layer (5) comprises a rubber buffer ring (7) in contact with the inner wall of the outer tire (2), and a metal microporous mesh (8) is fixedly connected to the side of the rubber buffer ring (7) away from the outer tire (2).

3. The puncture-resistant and noise-reducing tire according to claim 2, characterized in that: A gap is formed between the rubber buffer ring (7) and the inner wall of the outer tire (2), thereby preventing the rubber buffer ring (7) from being too closely attached to the outer tire (2) and affecting the deformation of the elastic anti-puncture layer (5).

4. The puncture-resistant and noise-reducing tire according to claim 3, characterized in that: An impact-resistant layer (9) is fixedly connected to the side of the metal microporous mesh (8) away from the rubber buffer ring (7); the impact-resistant layer (9) is made of rubber and has an annular cavity; and an impact-resistant liquid is arranged inside the annular cavity.

5. The puncture-resistant and noise-reducing tire according to claim 4, characterized in that: A plurality of circumferentially evenly distributed partition bars are arranged inside the annular cavity, and the plurality of circumferentially evenly distributed partition bars divide the annular cavity into a plurality of circumferentially evenly distributed unit cavities (10), and the anti-shock liquid is located inside the plurality of unit cavities (10).

6. The puncture-resistant and noise-reducing tire according to claim 5, characterized in that: The self-repairing layer (6) comprises two coaxially arranged rubber outer rings (11) and rubber inner rings (12), wherein a plurality of repair cavities (13) evenly distributed around the circumference are respectively provided inside the rubber outer rings (11) and the rubber inner rings (12), the repair cavities (13) of the rubber outer rings (11) and the rubber inner rings (12) are arranged alternately and partially overlapped, and the sealant is arranged in the repair cavities (13).

7. The puncture-resistant and noise-reducing tire according to claim 6, characterized in that: A movable isolation membrane is provided on the inner wall of the plurality of repair cavities (13), the sealant is located inside the isolation membrane, air storage cavities (14) are respectively provided on both sides of the repair cavity (13), a through groove (15) is provided between the air storage cavity (14) and the repair cavity (13), and compressed gas is provided inside the air storage cavity (14) for squeezing the sealant.

8. The puncture-resistant and noise-reducing tire according to claim 7, characterized in that: The outer tire (2) comprises a carcass (16) and a sidewall (17); the carcass (16) is in direct contact with the ground; a transition area between the carcass (16) and the sidewall (17) is a shoulder (18); the cross section of the shoulder (18) is an arc-shaped structure; the plurality of air storage chambers (14) are located on the inner side of the shoulder (18); when the outer tire (2) is in contact with the ground and the shoulders (18) on both sides are deformed, the shoulders (18) squeeze the adjacent air storage chambers (14).

9. The puncture-resistant and noise-reducing tire according to claim 8, characterized in that: It also includes a noise reduction mechanism, the noise reduction mechanism being coaxially arranged at the inner circle of the self-repairing layer (6), the noise reduction mechanism comprising an annular frame (19), and a plurality of arc-shaped sound-absorbing cottons (20) evenly distributed around the circumference being arranged on the annular frame (19); The annular frame (19) comprises two symmetrically distributed annular metal bars (21), the diameter of the annular metal bars (21) being consistent with the inner diameter of the self-repairing layer (6), a plurality of circumferentially evenly distributed connecting bars (22) being fixed to the two annular metal bars (21), a placement groove being formed between two adjacent connecting bars (22) and the two annular metal bars (21), a plurality of the arc-shaped sound-absorbing cottons (20) being fixedly connected in the corresponding placement grooves, and the annular metal bars (21) and the connecting bars (22) are both made of stainless steel.

10. A method for preparing a puncture-resistant and noise-reducing tire, characterized in that: The method for preparing the puncture-resistant and noise-reducing tire according to claim 9 comprises the following steps: Step 1: Before the tire body (3) is vulcanized and formed, an elastic puncture-proof layer (5) is installed on the tire casing (2). The specific steps are as follows: S101: preheating the metal microporous mesh (8), and then bonding and fixing the rubber buffer ring (7), the metal microporous mesh (8) and the impact-resistant layer (9) in sequence by using a high-temperature resistant adhesive; S102: injecting anti-impact liquid into the multiple unit cavities (10) of the anti-impact layer (9), and immediately sealing the injection port with a hot melt tool after each injection. After all injections are completed, an elastic anti-puncture layer (5) is obtained; S103: installing an elastic puncture-proof layer (5) on the inner wall of the outer tire (2), wherein the outer edge of the elastic puncture-proof layer (5) is bonded and fixed to the inner wall of the outer tire (2) by a high-temperature resistant adhesive, and a gap is left between the elastic puncture-proof layer (5) and the outer tire (2); Step 2: Installing a self-repairing layer (6) on the basis of the elastic anti-puncture layer (5), the specific steps are as follows: S201: The rubber outer ring (11) and the rubber inner ring (12) are bonded and fixed by using a high temperature resistant adhesive, and the repair cavities (13) of the rubber outer ring (11) and the rubber inner ring (12) are arranged alternately; S202: injecting sealant into the repair cavity (13) of the rubber outer ring (11) and the rubber inner ring (12), and immediately sealing the injection port with a hot melt tool after each injection is completed. After all injections are completed, a self-repairing layer (6) is obtained; S203: bonding and fixing the self-repairing layer (6) and the elastic puncture-proof layer (5) by means of a high-temperature resistant adhesive to obtain a finished tire product; Step 3: vulcanizing and molding the sub-finished tire to obtain a finished tire; Step 4: Install a noise reduction mechanism in the finished tire. The specific steps are as follows: S401: fixing a plurality of arc-shaped sound-absorbing cottons (20) in sequence in a plurality of placement grooves of the annular frame (19); S402: The annular frame (19) is coaxially placed inside the outer tire (2) so that the annular frame (19) is in contact with the self-repairing layer (6).

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