KR102312931B1 - A non pneumatic tire and mnufactureing method of it - Google Patents

Abstract

The present invention relates to a non-pneumatic tire for a vehicle, and more particularly, to a non-pneumatic tire for a vehicle that allows the rim of a conventional pneumatic tire to be used as it is. Accordingly, in the non-pneumatic tire for a vehicle, the present invention includes a tread part 100 that comes into contact with the ground, a spoke part 200 installed at the bottom of the tread part 100 to relieve an impact, and a rim 400 of the tire. It provides a non-pneumatic tire for a vehicle, characterized in that it comprises a bead portion 300 for fastening with.

Description

Non-pneumatic tire for vehicle and manufacturing method thereof

The present invention relates to a non-pneumatic tire for a vehicle, and more particularly, to a non-pneumatic tire for a vehicle that allows the rim of a conventional pneumatic tire to be used as it is.

Recently, as a technology developed to replace a conventional radial tire, a tread compound deformation technology or a non-pneumatic (or non-pneumatic) tire has been mentioned. Among the tires mentioned above, the tire that is being developed the fastest is the non-pneumatic tire. Early non-pneumatic tires were developed for the purpose of counteracting a puncture that occurs when a sidewall receives an impact due to an external impact. The non-pneumatic tire is a tire designed to compensate for the disadvantages of the conventional radial tire through the structure of a tire having a separate cushioning means without filling it with air. However, if the structure of the buffer means is weak, there is a problem that the tire may be damaged because it cannot support the weight of the vehicle. Conventional non-pneumatic tires usually consist of a tread in contact with the ground, a spoke portion having a plurality of spokes to absorb shocks generated on the road, and a wheel mounted on a vehicle. .

Hereinafter, the prior art will be looked at. Identifiers in the following prior art are irrelevant to the present invention.

Republic of Korea Patent No. 10-1015363 'non-pneumatic tire-integrated wheel structure' relates to a non-pneumatic tire-integrated wheel structure to which a non-pneumatic tire that supports a vehicle without using pneumatic pressure is applied. A non-pneumatic tire 10 having a; a drum 20 installed inside the space of the rim 14 so as to be spaced apart from the rim 14; a bearing (15) installed between the rim (14) and the drum (20); an axle connecting portion 30 installed inside the drum 20 and having a hub 35 to which an axle is connected; a pair of vertical movement links 40 respectively installed on the inner upper and lower portions of the drum 20 and connecting the axle connecting portion 30 and the drum 20; A pair of cantilever beams 33 installed in the axle connection part 30 in a symmetrical structure and a pair of suspensions 50 for connecting the drum 20, respectively, are included, wherein the drum 20 includes the axle The connection part 30 is located inside the large-diameter part 21 to which the vertical movement link 40 and the suspension 50 are installed, and the large-diameter part 21 is installed inside the large-diameter part 21 and the vertical movement link 40 and the suspension The first coupling part 23 and the second coupling part 24 to which 50 is hinged, and the large diameter part 21 are coupled to one side of the large diameter part 21 to support the large diameter part 21 and the axle connection part 30 Disclosed is a non-pneumatic tire-integrated wheel structure comprising a small-diameter portion 22 having a hole through which the tire passes. No. 10-1015363 secures safety by the non-pneumatic tire, and can alleviate the impact transmitted along the rotational direction through the relative rotation of the non-pneumatic tire with respect to the axle part, and the up-and-down movement link and suspension As it absorbs vibration and blocks movement in other directions, the effect of improving riding comfort can be expected.

Republic of Korea Patent No. 10-1147859, 'Non-pneumatic tire with reinforced side part' relates to a non-pneumatic tire for a vehicle. It is about a pneumatic tire. No. 10-1147859 has a tread (1) in contact with a road surface, the tread (1) having an elastic body part (2) in contact with the inside of the tread (1), and a side surface while in contact with the inside of the elastic body part (2) The reinforced spoke part 3 and the wheel 4 disposed in contact with the inside of the spoke part 3, the tread 1, the elastic body part 2, the spoke part 3 and the wheel ( 4) In a non-pneumatic tire formed by physical and chemical bonding at high pressure and temperature by inserting a polymer or an adhesive among polymers or polymers, the spoke part 3 has a thick spoke 3b of circular cross section on both sides. ) and a thin spoke 3a connecting between the thick spoke 3b, and a thin spoke 3a that transmits the load of the vehicle and a thick spoke 3b that supports the side part of the tire in a compressed form. Disclosed is a non-pneumatic tire for reinforcing the side portion, characterized in that the spoke portion 3 is connected to the elastic body portion 2 by an outer shear layer 3c and to the wheel 4 by an inner shear layer 3d. there is a bar

Republic of Korea Patent Registration No. 10-1015363 'Integrated wheel structure with non-pneumatic tires' (Announced on February 16, 2011) Republic of Korea Patent No. 10-1147859 'Non-pneumatic tire with reinforced side part' (Announced on May 24, 2012)

Conventional non-pneumatic tires have a structure that cannot use the rim of a general pneumatic tire. That is, in order to use a non-pneumatic tire, a dedicated tire needs to be replaced, but there is a problem in that the cost consumed for this is enormous.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical problem, an embodiment of the present invention is a non-pneumatic tire for a vehicle. 200) and a non-pneumatic tire for a vehicle including a bead part 300 for fastening with the rim 400 of the tire.

Conventional non-pneumatic tires have a structure that cannot use the rim of a general pneumatic tire. However, the present invention provides a non-pneumatic tire that can be mounted on a conventional rim by having the same beaded portion as a conventional pneumatic tire.

In addition, the present invention has an advantage in that there is less possibility of damage to the spokes because the bead portion primarily receives the lateral force applied during cornering driving without the spokes directly receiving it. In addition, since the spokes do not directly receive lateral force, it can be expected to improve the ride comfort and the problem of driving performance degradation mentioned in other non-pneumatic tires (NPT).

division Conventional NPT Invention NPT Handling 5 8 Braking 5 9 Weight 20 kg 12 kg Noise 5 8

Table 1 above compares and evaluates the present invention and its H433 product, and compares performance with respect to handling, braking, weight, and noise. From the above table, it can be seen that the performance of the non-pneumatic tire of the present invention is improved compared to the prior art.

In addition, the present invention has the advantage of easy retreading because it is manufactured by bonding the tread to the spoke part and then vulcanizing it. Accordingly, there is an advantage of being able to easily replace the tread according to various uses such as snow and racing as well as regeneration.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of a main part of an embodiment of a non-pneumatic tire of the present invention;
2 is a sectional view of a main part of an embodiment of a non-pneumatic tire of the present invention.
3 is a perspective view of one embodiment of a non-pneumatic tire of the present invention;
4 is an exploded perspective view of another embodiment of the non-pneumatic tire of the present invention.
5 is a perspective view of another embodiment of a non-pneumatic tire of the present invention;
6 is a side view of another embodiment of a non-pneumatic tire of the present invention;

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view of a main part of an embodiment of a non-pneumatic tire of the present invention, and Fig. 2 is a cross-sectional view of a main part of an embodiment of a non-pneumatic tire of the present invention. The present invention relates to a non-pneumatic tire for a vehicle, a tread part 100 coming into contact with the ground, a spoke part 200 installed at the bottom of the tread part 100 to relieve an impact, and a rim 400 of the tire and fastened It provides a non-pneumatic tire for a vehicle including a bead portion 300 for

The bead part 300 is formed of rubber, has a mounting surface 301 having a shape corresponding to the part to which the rim 400 of the tire is mounted, and is used to improve rigidity in order to be firmly attached to the rim 400 . It includes a bead bundle 310 composed of bead wires. That is, the non-pneumatic tire of the present invention has the advantage that it can be mounted on the rim of a general vehicle by having the bead part 300 like general pneumatic tires.

As described above, the bead part 300 in the present invention can be applied between the wheel and the spoke, means from the bead to the sidewall, and is produced in a size that is 50% lower than that of the existing bead filler in a state where air is not injected. It has the advantage of having a structure that is easy to replace with a wheel.

On the other hand, the tread part 100 is characterized in that it is easily replaced by a re-treading method, and can be attached by utilizing all tread extrudates corresponding to the tread parts of various tires. In this case, a method of bonding the tread and the spoke unit 200 may use an bonding method used in a general retreading method.

The non-pneumatic tire of the present invention includes a bead filler 320 that surrounds the bead bundle 310 and has rigidity for maintaining the skeleton of the bead unit 300 .

The height h1 of the bead part 300 is preferably 11 to 50% of the total tire height h2. That is, the ratio of the height of the structure of the bead part 300 and the spoke part 200 is 11-50: 50-89. When the height of the bead part 300 is less than 10%, it goes down to the height of the bead filler 320, so there is no flexible zone, and the spokes may be damaged during cornering driving. ) and the same problem with no difference occurs.

In addition, when the height of the bead part 300 exceeds 50% of the total tire height h2, the fluidity of the tire increases, and the installation with the rim 400 becomes unstable. As a problem occurs, the concept of a non-neumatic tire cannot be applied.

For the above reasons, in order to optimize the height of the bead part 300 , the height h1 of the spoke part 200 is preferably 50 to 89% of the total tire height h. The spoke unit 200 is provided with elastic spokes in a mesh structure to alleviate the impact from the ground. The present invention is not limited to the spoke structure of the spoke portion 200 .

In addition, the length L1 of the bead filler 320 is preferably 10 to 50% of the length L2 of the bead part 300 . In the present invention, the structure of the bead part 300 is composed of the same structure and material as that of a conventional tire. At this time, if the height of the bead filler 310 in the bead part 300 is less than 10%, it is impossible to install between the wheel and the tire, and if it exceeds 50%, there is a risk that cracks may grow due to excessive folding during driving.

According to the above configuration, the bead part 300 of the present invention not only provides a function that can be attached to a general rim, but also the bead part ( 300) can expect the function that it receives first. Because of this configuration, the present invention has an advantage in that there is little risk of damage to the spokes. In addition, since the spokes do not directly receive lateral force, it can be expected to improve the ride comfort and driving performance degradation problems mentioned in other non-pneumatic tires (NPT).

The present invention will further describe a method of manufacturing a non-pneumatic tire according to an embodiment of the present invention.

First, in the first step (s110), it is formed of rubber, has a mounting surface 301 having a shape corresponding to the part to which the rim 400 of the tire is mounted, and has rigidity in order to be firmly attached to the rim 400 . A bead portion 300 including a bead bundle 310 composed of bead wires to improve may be formed. And, in the second step (s120), the spoke portion 200 may be adhered to the bead portion 300 through an adhesive. Next, in the third step (s130), the tread part 100 may be installed by winding the semi-finished product of the tread part 100 on the spoke part 200 . Finally, a non-pneumatic tire may be manufactured by performing a vulcanization process in the fourth step ( s140 ).

In the third step, the tread part 100 is attached using a tread extrudate, and the range of the tread extrudate used at this time is not limited in the present invention.

As the tread part 100 of the present invention is installed on the spoke part 200 through the above processes, the application of a tretread process, which is a tire regeneration process, is very advantageous. Accordingly, in the fourth step (s140), the entire tire may be vulcanized, but the vulcanization method in the re-tread process in which only the tread portion is vulcanized may be applied.

Hereinafter, another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 4 is an exploded perspective view of another embodiment of the non-pneumatic tire of the present invention, Fig. 5 is a perspective view of another embodiment of the non-pneumatic tire of the present invention, and Fig. 6 is a side view of another embodiment of the non-pneumatic tire of the present invention. 4 to 6 , in the non-pneumatic tire of the present invention, the bead part 300 is retractable inside the spoke part 200 , and the spoke part 200 is inside the tread part 100 . Since it is retractable, it may be formed by assembling the tread part 100 , the spoke part 200 , and the bead part 300 .

Each of the tread part 100, the spoke part 200, and the bead part 300 may be manufactured as a separate finished product, and in this case, the tread part 100, the spoke part 200, and the bead part 300 with the above. ) after assembling sequentially, by introducing air into the tread part 100 or the bead part 300 to increase the volume of the tread part 100 or the bead part 300, the bead part 300, the spoke part ( 200) and the tread part 100 may be closely fixed to form the non-pneumatic tire of the present invention. Here, by introducing air into the tread part 100 or the bead part 300 to increase the volume of the tread part 100 or the bead part 300, the bead part 300, the spoke part 200 and the tread part ( 100) It is natural that each can be closely fixed.

Other matters may be the same as those of the above-described embodiment of the present invention.

The present invention will further describe a method of manufacturing a non-pneumatic tire according to another embodiment of the present invention.

In the first step (s210), it is formed of rubber, has a mounting surface 301 of a shape corresponding to the part to which the rim 400 of the tire is mounted, and improves rigidity in order to be firmly attached to the rim 400 . The bead portion 300 including the bead bundle 310 composed of bead wires for can be molded. And, in the second step (s220), it can be assembled by inserting the bead part 300 inside the spoke part 200 . Next, in the third step (s230), the assembly of the spoke part 200 and the bead part 300 may be inserted into the tread part 100 and assembled. Finally, in the fourth step (s240), air is injected into the bead part 300 or the tread part 100 to closely fix the bead part 300, the spoke part 200 and the tread part 100, respectively. have.

Here, between the inner surface of the tread part 100 and the outer surface of the spoke part 200, a first adhesive part having adhesive performance and formed along the inner surface shape of the tread part 100 is formed, and the spoke part ( Between the inner surface of the 200 and the outer surface of the bead portion 300, it is possible to form a second adhesive portion formed along the inner surface shape of the spoke portion (200). Accordingly, when air is introduced into the bead part 300 or the tread part 100 to bring the bead part 300, the spoke part 200 and the tread part 100 into close contact with each other, the bead part 300 and the spoke part The coupling force of each of the 200 and the tread part 100 may be increased to increase the durability of the non-pneumatic tire of the present invention.

As the application of the retread process to the present invention is easy, there is an advantage in that the tread according to various uses such as snow and racing can be easily replaced as well as regeneration by the retread process.

The conventional non-pneumatic tire uses an adhesive between the spoke and the tread, and the tread gauge is generally 0.8 mm, which is thinner than the existing PCR. Therefore, the tread life (mileage) is also short, which reduces the cost efficiency compared to the product. However, the present invention can easily apply the retreading method, so it utilizes the extruded rubber (recoup rubber) generated during extrusion by the tire manufacturer, and uses the tread desired by the user (summer, winter, racing, semi, off-road). etc.) to select and re-thread. Accordingly, the producer can exhaust the recoup rubber, and the user can enjoy the diversity of the tread. In addition, according to this configuration, the gauge of the tread becomes thicker compared to the existing one, so that it is possible to provide a non-pneumatic tire (NPT) in which the life (mileage) of the tire is also sufficiently secured.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: tread
200: spoke part
300: bead unit
301: mounting surface
310: bead bundle
320: bead filler
400: rim

Claims (10)

In the non-pneumatic tire for a vehicle,
It includes a tread part 100 that comes into contact with the ground, a spoke part 200 that is installed at the bottom of the tread part 100 and relieves an impact, and a bead part 300 for fastening with the rim 400 of the tire, and ,
The tread part 100, the spoke part 200 and the bead part 300 are each formed separately,
The bead part 300 is introduced into the spoke part 200 , and the spoke part 200 is introduced into the tread part 100 , so that the tread part 100 and the spoke part 200 are introduced. ) and the bead part 300 are sequentially assembled to form a tire,
A first adhesive part having adhesive performance between the inner surface of the tread part 100 and the outer surface of the spoke part 200 and formed along the inner surface shape of the tread part 100 is formed,
A second adhesive portion formed along the inner surface shape of the spoke portion 200 is formed between the inner surface of the spoke portion 200 and the outer surface of the bead portion 300,
When the tread part 100, the spoke part 200, and the bead part 300 are combined, air is injected into the tread part 100 or the bead part 300, and the tread part 100 and By adhering each of the spoke part 200 and the bead part 300 to increase the adhesive bonding force, the durability of the tire is increased,
Since the height of the bead part 300 is 11-50% of the total tire height, it is easy to secure a flexible zone in the tire, so that the spoke part 200 is prevented from being damaged during cornering driving of the tire,
Since the height of the spoke part 200 is 50 to 89% of the total tire height, the mounting instability of the bead part 300 with respect to the rim 400 caused by the increase in the fluidity of the tire is prevented,
The spoke part 200 is provided with elasticity and has spokes and elasticity that are formed to extend in a straight line with respect to the radial direction of the tire in a cross section of the spoke part 200 perpendicular to the rotation axis of the tire, and have elasticity on the rotation axis of the tire. A non-pneumatic tire for a vehicle, characterized in that in the cross section of the vertical spoke portion (200), the impact from the ground is alleviated by providing a net structure by combining spokes formed in a wavy shape along the circumferential direction of the tire.
According to claim 1,
The bead part 300 is formed of rubber, has a mounting surface 301 having a shape corresponding to the part to which the rim 400 of the tire is mounted, and is used to improve rigidity in order to be firmly attached to the rim 400 . A non-pneumatic tire for a vehicle, characterized in that it comprises a bead bundle (310) composed of bead wires.
3. The method of claim 2,
A non-pneumatic tire for a vehicle, comprising a bead filler (320) surrounding the bead bundle (310) and having rigidity for maintaining the skeleton of the bead part (300).
4. The method of claim 3,
A non-pneumatic tire for a vehicle, characterized in that the length (L1) of the bead filler (320) is 10 to 50% of the length (L2) of the bead part (300).
delete delete delete delete delete In the manufacturing method of the non-pneumatic tire for a vehicle according to claim 1,
A bead formed of rubber, having a mounting surface 301 having a shape corresponding to the part to which the rim 400 of the tire is mounted, and composed of bead wires to improve rigidity in order to be firmly attached to the rim 400 . A first step (s210) of forming the bead portion 300 including the bundle 310 (s210);
a second step (s220) of assembling by inserting the bead part 300 into the spoke part 200;
a third step (s230) of assembling by inserting the assembly of the spoke part 200 and the bead part 300 into the tread part 100; and
a fourth step (s240) of injecting air into the bead part 300 or the tread part 100 to closely fix each of the bead part 300, the spoke part 200 and the tread part 100; A method of manufacturing a non-pneumatic tire for a vehicle, comprising:

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