Tire

Abstract

A tire is disclosed. The disclosed tire may comprise: a tread part which has a center block formed at the center side in the widthwise direction of the tire and has grooves extending in the circumferential direction of the tire; a carcass part which is provided inside the tread part; a belt part which is laminated on the carcass part; a reinforcement belt part which is laminated on the belt part; and an additional belt part which is provided between the reinforcement belt part and the center block.

Description

tire

[0001] The present invention relates to a tire, and more particularly, to a tire capable of reducing the weight of the tire while improving ride comfort and durability.

[0002] Most countries, except for some countries in Europe, Asia Pacific, and Russia, operate a plunger evaluation certification system.

[0003] Until now, plunger evaluation has not been a major topic of interest, but with the global focus on eco-friendliness and the rise in raw material prices, the importance of RR performance and weight reduction has increased. As a result, cases of tire strength falling short in plunger evaluations have frequently occurred due to the resulting weight reduction in products, making reinforcement necessary.

[0004] Plunger testing is a test that uses a plunger to apply load to the tread area, assessing the energy value when a tire puncture occurs. The plunger test is conducted using a device that meets regulatory requirements. A rod-shaped plunger is used to press a specific tire block, and the resulting load and displacement are used to measure deformation energy. The deformation energy must meet the standards established by each country's regulations.

[0005] Conventional tires have sufficiently reinforced structures to meet the regulations set by each country, but as the materials and structures of semi-finished products layered under the tread, such as carcasses, belts, and reinforcing belts, become lighter, cases are occurring where they do not meet the regulations.

[0006] Therefore, technology is needed to simultaneously reduce the weight of tires and improve their strength.

[0007] The purpose of the present invention to solve the above problems is to provide a tire that applies a reinforcement structure that improves ride comfort and durability while simultaneously reducing the weight of the tire and improving strength.

[0008] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] According to one embodiment of the present invention, a tire may be provided that includes a center block formed on the center side of the width direction of the tire, a tread portion including a groove extending in the circumferential direction of the tire, a carcass portion provided on the inner side of the tread portion, a belt portion laminated on the upper part of the carcass portion, a reinforcing belt portion laminated on the upper part of the belt portion, and an additional belt portion provided between the reinforcing belt portion and the center block.

[0010] The above carcass portion may be provided with at least one sheet, the above belt portion may be provided with at least two sheets, and the above reinforcing belt portion may be provided with at least one sheet.

[0011] The belt portion includes a first belt laminated on the upper portion of the carcass portion, and a second belt laminated on the upper portion of the first belt, and the first belt and the second belt may be provided as a high tensile belt or a super high tensile belt (ultra tensile belt).

[0012] The above reinforcing belt portion is provided with a closed pitch, and the additional belt portion can be formed by laminating it on top of the reinforcing belt portion.

[0013] The above reinforcing belt part is provided with an open pitch, and the additional belt part can be formed by laminating it on top of the reinforcing belt part.

[0014] According to one embodiment of the present invention, a tire may be provided, including a tread portion including a center groove extending in the circumferential direction of the tire on the center side of the width direction of the tire and center blocks formed on both sides of the center groove, a carcass portion provided on the inner side of the tread portion, a belt portion laminated on the upper part of the carcass portion, a reinforcing belt portion laminated on the upper part of the belt portion, and an additional belt portion provided between the reinforcing belt portion and the center block.

[0015] The above carcass portion may be provided with at least one sheet, the above belt portion may be provided with at least two sheets, and the above reinforcing belt portion may be provided with at least one sheet.

[0016] The belt portion includes a first belt laminated on the upper portion of the carcass portion, and a second belt laminated on the upper portion of the first belt, and the first belt and the second belt may be provided as a high tensile belt or a super high tensile belt (ultra tensile belt).

[0017] The above reinforcing belt portion is provided with a closed pitch, and the additional belt portion can be formed in a laminated manner on top of the reinforcing belt portion.

[0018] The above reinforcing belt part is provided with an open pitch, and the additional belt part can be formed by laminating it on top of the reinforcing belt part.

[0019] According to one embodiment of the present invention described above, the number of carcass parts, belts, and reinforcing belt parts is reduced compared to conventional tires, resulting in a lightweight structure, thereby enabling the manufacture of an environmentally friendly tire.

[0020] In addition, according to the present invention, the strength reduction that occurs as the structure becomes lighter is reinforced by providing a partial additional belt section, thereby providing the effect of preventing a decrease in durability while reducing the weight of the structure.

[0021] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0022] Figure 1 is an enlarged cross-sectional view of a tire according to a first embodiment of the present invention.

[0023] Figure 2 is a cross-sectional view showing the overall configuration of a tire according to the first embodiment of the present invention.

[0024] Figure 3 is a cross-sectional view showing the main configuration of a tire according to the first embodiment of the present invention.

[0025] Figure 4 is a cross-sectional view showing the main configuration of a tire according to the second embodiment of the present invention.

[0026] Figure 5 is a cross-sectional view showing the overall configuration of a tire according to a third embodiment of the present invention.

[0027] Figure 6 is a cross-sectional view showing the main configuration of a tire according to a third embodiment of the present invention.

[0028] Figure 7 is a cross-sectional view showing the main configuration of a tire according to the fourth embodiment of the present invention.

[0029] In describing the present invention below, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0030] Since embodiments according to the concept of the present invention can be modified in various ways and take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to a specific disclosed form, and it should be understood that the present invention includes all modifications, equivalents, and alternatives included within the spirit and technical scope of the present invention.

[0031] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0032] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the present invention. The singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, it should be understood that the terms “comprises” or “has” indicate the presence of implemented features, numbers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0033] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

[0034] FIG. 1 is an enlarged cross-sectional view of a tire according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the overall configuration of a tire according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the main configuration of a tire according to the first embodiment of the present invention.

[0035] As illustrated in FIGS. 1 to 3, the tire (100) according to the first embodiment may include a tread portion (110), a carcass portion (120), a belt portion (130), a reinforcing belt portion (140), and an additional belt portion (150).

[0036] The above tread portion (110) may include a center block (111) and a groove (112).

[0037] The above center block (111) may be arranged to be located at the center of the width of the tread portion (110).

[0038] The above groove (112) is provided on both sides of the center block (111) and can be formed to extend in the circumferential direction of the tire.

[0039] The above carcass portion (120) is provided on the inner side of the tread portion (110) and may be provided to form the skeleton of the tire. The above carcass portion (120) may be composed of a cord layer wrapped with rubber and may be provided as a single sheet.

[0040] The above belt portion (130) may be laminated on the upper portion of the carcass portion (120) and provided between the tread portion (110) and the carcass portion (120).

[0041] More specifically, the belt portion (130) may include a first belt (131) laminated on the upper portion of the carcass portion (120) and a second belt (132) laminated on the upper portion of the first belt (131).

[0042] The above belt portion (130) is provided as two belts, and can be provided to strongly hold the carcass portion (120) to increase the elasticity of the tread portion (110).

[0043] In addition, the belt portion (130) may be made of a high tensile belt or a super high tensile belt (ultra tensile belt).

[0044] The above reinforcing belt part (140) may be arranged to be stacked on top of the belt part (130). At this time, the reinforcing belt part (140) may be arranged to extend longer than the belt part (130) so as to reinforce the side surface of the belt part (130).

[0045] In particular, the reinforcing belt portion (140) according to the first embodiment can be provided with a closed pitch.

[0046] Here, closed pitch means that the reinforcing belt portion (140) is formed continuously without any gaps in the middle.

[0047] The above reinforcing belt portion (140) can be formed as one piece.

[0048] The above additional belt part (150) can be formed by being laminated on top of the above reinforcing belt part (140).

[0049] More specifically, the additional belt portion (150) may be formed on the upper portion of the reinforcing belt portion (140) and the inner side of the tread portion (110), and may be formed at a position corresponding to the center block (111), which is a portion pressed by the plunger. In addition, the additional belt portion (150) may be formed to have a length less than the width of the center block (111).

[0050] At this time, the additional belt portion (150) may be formed by stacking one or more sheets.

[0051] Figure 4 is a cross-sectional view showing the main configuration of a tire according to the second embodiment of the present invention.

[0052] Referring to FIG. 4, the tread portion, carcass portion, and belt portion of the tire (200) according to the second embodiment are substantially the same as the configuration of the tire (100) according to the first embodiment, so a detailed description thereof will be omitted.

[0053] The reinforcing belt portion (240) according to the second embodiment may be arranged to be stacked on top of the belt portion (230). At this time, the reinforcing belt portion (240) may be arranged to extend longer than the belt portion (230) so as to reinforce the side surface of the belt portion (230).

[0054] In particular, the reinforcing belt portion (240) according to the second embodiment can be provided with an open pitch.

[0055] Specifically, the reinforcing belt section (240) typically employs a nylon-aramid hybrid to enhance performance, such as improved NV performance (rumble) and high-speed durability. However, this tends to worsen pattern noise. Therefore, to improve this, the reinforcing belt section (240) is formed with sections where reinforcing belts are not formed in the middle and are spaced apart. This is called an open pitch.

[0056] The reinforcing belt portion (240) prepared in this manner can be formed as a single piece.

[0057] The above additional belt part (250) can be formed by being laminated on top of the above reinforcing belt part (240).

[0058] More specifically, the additional belt portion (250) may be formed on the upper portion of the reinforcing belt portion (240) and on the inner side of the tread portion, and may be formed at a position corresponding to the center block, which is a portion pressed by the plunger. In addition, the additional belt portion (250) may be formed to have a length less than the width of the center block. At this time, the additional belt portion (250) may be laminated and arranged on the upper portion of the belt portion (230) on a portion where the reinforcing belt is not formed due to the open pitch.

[0059] In addition, the additional belt portion (250) may be formed by stacking two or more sheets to further enhance durability.

[0060] FIG. 5 is a cross-sectional view showing the overall configuration of a tire according to a third embodiment of the present invention, and FIG. 6 is a cross-sectional view showing the main configuration of a tire according to a third embodiment of the present invention.

[0061] As illustrated in FIGS. 5 and 6, a tire (300) according to the third embodiment may include a tread portion (310), a carcass portion (320), a belt portion (330), a reinforcing belt portion (340), and an additional belt portion (350).

[0062] The above tread portion (310) may include a center groove (311) and a center block (312).

[0063] The above-mentioned center groove (311) may be formed to extend in the circumferential direction of the tire along the width central axis of the tread portion (310).

[0064] The above center block (312) can be formed on both sides of the above center groove (311).

[0065] The above carcass portion (320) is provided on the inner side of the tread portion (310) and may be provided to form the skeleton of the tire. The above carcass portion (320) may be composed of a cord layer wrapped with rubber and may be provided as a single sheet.

[0066] The above belt portion (330) may be laminated on the upper portion of the carcass portion (320) and provided between the tread portion (310) and the carcass portion (320).

[0067] More specifically, the belt portion (330) may include a third belt (331) laminated on the upper portion of the carcass portion (320) and a second belt (332) laminated on the upper portion of the third belt (331).

[0068] The above belt portion (330) is provided as two belts, and can be provided to strongly hold the carcass portion (320) to increase the elasticity of the tread portion (310).

[0069] Additionally, the belt portion (330) may be made of a high tensile belt or a super high tensile belt (ultra tensile belt).

[0070] The above reinforcing belt portion (340) may be arranged to be stacked on top of the belt portion (330). At this time, the reinforcing belt portion (340) may be arranged to extend longer than the belt portion (330) so as to reinforce the side surface of the belt portion (330).

[0071] In particular, the reinforcing belt portion (340) according to the third embodiment can be provided in a closed pitch.

[0072] Here, closed pitch means that the reinforcing belt portion (340) is formed continuously without any gaps in the middle.

[0073] The above reinforcing belt portion (340) may be formed as a single sheet. The additional belt portion (350) may be formed by being laminated on top of the reinforcing belt portion (340).

[0074] More specifically, the additional belt portion (350) may be formed on the upper portion of the reinforcing belt portion (340) and the inner side of the tread portion (310), and may be formed at a position corresponding to a pair of center blocks (312) that are pressed by the plunger. In addition, the additional belt portion (350) may be formed to have a length less than the width of each of the pair of center blocks (312).

[0075] Figure 7 is a cross-sectional view showing the main configuration of a tire according to the fourth embodiment of the present invention.

[0076] Referring to FIG. 7, the tread portion, carcass portion, and belt portion of the tire (400) according to the fourth embodiment are substantially the same as the configuration of the tire (300) according to the third embodiment, so a detailed description thereof will be omitted.

[0077] The reinforcing belt portion (440) according to the fourth embodiment may be arranged to be stacked on top of the belt portion (430). At this time, the reinforcing belt portion (440) may be arranged to extend longer than the belt portion (430) so as to reinforce the side surface of the belt portion (430).

[0078] In particular, the reinforcing belt portion (440) according to the fourth embodiment can be provided with an open pitch.

[0079] Specifically, the reinforcing belt section (440) typically employs a nylon-aramid hybrid to enhance performance, such as improved NV performance (rumble) and high-speed durability. However, this tends to worsen pattern noise. Therefore, to improve this, the reinforcing belt section (440) is formed with sections where reinforcing belts are not formed in the middle and are spaced apart. This is called an open pitch.

[0080] The reinforcing belt portion (440) prepared in this manner can be formed as a single piece.

[0081] The above additional belt part (450) can be formed by being laminated on top of the above reinforcing belt part (440).

[0082] More specifically, the additional belt part (450) may be formed on the upper part of the reinforcing belt part (440) and on the inner side of the tread part, and may be formed at positions corresponding to the pair of center blocks, which are portions pressed by the plunger. In addition, the additional belt part (450) may be formed to have a length less than the width of each of the pair of center blocks. At this time, the additional belt part (250) may be stacked and arranged on the upper part of the belt part (230) on a portion where the reinforcing belt is not formed due to the open pitch.

[0083] In addition, the additional belt portion (450) may be formed by stacking two or more sheets to further enhance durability.

[0084] According to the present invention, which is prepared as described above, the number of carcass parts, belts, and reinforcing belt parts is reduced compared to conventional tires, and the structure is made lighter, thereby making it possible to manufacture an environmentally friendly tire.

[0085] In addition, according to the present invention, the effect of preventing a decrease in durability while reducing the weight of the structure is provided by partially reinforcing the decrease in strength that occurs as the structure becomes lighter by providing an additional belt portion.

[0086] In particular, the additional belt part can pass the plunger test, which is a required standard, by reinforcing the part where pressure is applied by the plunger in the plunger test.

[0087] While the technical concepts of the present invention described above have been specifically described in preferred embodiments, it should be noted that the above embodiments are intended for illustrative purposes only and are not intended to be limiting. Furthermore, those skilled in the art will appreciate that various embodiments are possible within the scope of the technical concepts of the present invention. Therefore, the true scope of technical protection of the present invention should be determined by the technical concepts of the appended claims.

Claims

1. A tread section including a center block formed on the center side of the width direction of the tire and a groove extending in the circumferential direction of the tire; A carcass portion provided on the inner side of the above tread portion; A belt portion laminated on the upper part of the above carcass portion; A reinforcing belt portion laminated on the upper part of the above belt portion; and A tire including an additional belt portion provided between the reinforcing belt portion and the center block.

2. In paragraph 1, A tire in which the carcass portion is provided with at least one sheet, the belt portion is provided with at least two sheets, and the reinforcing belt portion is provided with at least one sheet.

3. In paragraph 2, The above belt part, A first belt laminated on the upper part of the carcass; and It includes a second belt that is laminated on top of the first belt, A tire in which the first belt and the second belt are provided as high tensile belts or super high tensile belts (ultra tensile belts).

4. In paragraph 1, The above reinforcing belt part It is prepared with a closed pitch, The above additional belt part, A tire formed in layers on the upper part of the above reinforcing belt section.

5. In paragraph 1, The above reinforcing belt part It is prepared with an open pitch, The above additional belt part, A tire formed in layers on the upper part of the above reinforcing belt section.

6. A tread portion including a center groove extending in the circumferential direction of the tire on the center side of the width direction of the tire, and a center block formed on both sides of the center groove; A carcass portion provided on the inner side of the above tread portion; A belt portion laminated on the upper part of the above carcass portion; A reinforcing belt portion laminated on the upper part of the above belt portion; and A tire including an additional belt portion provided between the reinforcing belt portion and the center block.

7. In paragraph 6, A tire in which the carcass portion is provided with at least one sheet, the belt portion is provided with at least two sheets, and the reinforcing belt portion is provided with at least one sheet.

8. In paragraph 7, The above belt part, A first belt laminated on the upper part of the carcass; and It includes a second belt that is laminated on top of the first belt, A tire in which the first belt and the second belt are provided as high tensile belts or super high tensile belts (ultra tensile belts).

9. In paragraph 6, The above reinforcing belt part It is prepared with a closed pitch, The above additional belt part, A tire formed in layers on the upper part of the above reinforcing belt section.

10. In paragraph 6, The above reinforcing belt part It is prepared with an open pitch, The above additional belt part, A tire formed in layers on the upper part of the above reinforcing belt section.

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