Tire having reinforcing belt with reduced noise

Abstract

The present invention relates to a tire having a reinforcing belt with reduced noise and, more specifically, to a tire having a reinforcing belt with reduced noise, comprising: a belt layer provided inward in a radial direction of the tire with respect to a tread in contact with the ground; a reinforcing belt layer provided on an outer side in a radial direction of the tire with respect to the belt layer; a carcass layer provided at an inner side in a radial direction of the tire with respect to the belt layer; and a filling layer provided between the carcass layer and an inner liner, thereby improving the rigidity of the tread portion and driving performance and simultaneously reducing noise caused by resonance.

Description

Tires with noise-reducing reinforcement belts

[0001] The present invention relates to a tire having a lightweight reinforcing belt with reduced noise, and more specifically, to a tire having a reinforcing belt with reduced noise for improving the rigidity and driving performance of the tread portion while simultaneously reducing noise caused by resonance.

[0002]

[0003] Tires perform the functions of transmitting power to the ground, braking, and cushioning vibrations and shocks from the ground that occur during vehicle operation.

[0004] The tire, which plays an important role in driving and braking such a vehicle, is equipped with internal air pressure to perform the function of a tire and comprises a tread portion that contacts the road surface, a belt layer that maintains the grip of the tread, and a carcass portion that forms the framework of the tire.

[0005] Recently, in heavy-duty tires mounted on trucks or buses, a circumferential reinforcing layer is placed on the belt layer to suppress the growth of the tire diameter in the center region and to equalize the contact pressure distribution related to the tire width direction, thereby improving the tire's resistance to uneven wear.

[0006] However, these belt layers often have problems in terms of durability, such as separation caused by continuous force acting on the ends of the belt layer during tire operation.

[0007] To address these conventional problems, a reinforcing belt layer was previously arranged radially outward from the belt layer. While this reinforcing belt layer improved high-speed durability and wear performance, it presented issues such as increased noise generation and reduced rolling resistance due to increased weight.

[0008] In addition, each tire has a unique frequency band, which changes depending on changes in the compound, structure, mold shape, etc. However, the conventional method of adding a reinforcing belt layer has the problem of increasing noise by generating resonance in the 200-300 Hz frequency band while increasing the stiffness of the tire.

[0009] Therefore, technology is needed to improve the rigidity and driving performance of the tread while simultaneously reducing noise.

[0010] <Prior Art> Chinese Registered Patent No. 102171058

[0011]

[0012] The objective of the present invention to solve the above-mentioned problems is to provide a tire having a noise-reducing reinforcing belt that improves the rigidity and driving performance of the tread portion while simultaneously reducing noise caused by resonance.

[0013] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0014]

[0015] The configuration of the tire having a noise-reducing reinforcing belt according to the present invention for achieving the above-mentioned purpose comprises: a belt layer provided radially inward from the tread in contact with the ground; a reinforcing belt layer disposed radially outward from the belt layer; a carcass layer provided radially inward from the belt layer; and a filling layer provided between the carcass layer and the inner liner.

[0016] In an embodiment of the present invention, the belt layer is composed of a plurality of belts, and the width of the filling layer may be formed to be smaller than the width of the first belt layer located radially inward among the plurality of belts.

[0017] In an embodiment of the present invention, the carcass layer is composed of a carcass cord and a carcass topping rubber surrounding it, and the filling layer may have the same physical properties as the carcass topping rubber.

[0018] In an embodiment of the present invention, the reinforcing belt layer may have a winding portion in which a strap is disposed and an open portion in which the strap is not disposed along the width direction of the tire.

[0019] In an embodiment of the present invention, the winding portion may be formed to include an overlapping portion in which adjacent straps partially overlap.

[0020] In an embodiment of the present invention, the winding portion may include a first strap wound radially outward from the belt on the tire; a second strap wound adjacent to the first strap; and the overlapping portion formed by the first strap and the second strap overlapping.

[0021] In an embodiment of the present invention, the overlap portion may be 30% of the width of the first strap and the second strap.

[0022] In an embodiment of the present invention, the open portion provided between adjacent winding portions among the reinforcing belt layers, where the strap is not disposed, may be 50% of the width of the first strap and the second strap.

[0023] In an embodiment of the present invention, the reinforcing belt layer may be composed of a fabric cord and a topping rubber surrounding it.

[0024] In an embodiment of the present invention, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0025] In an embodiment of the present invention, the tread comprises a center block and a shoulder block formed by dividing them by a plurality of grooves, and the filling layer may be located radially inward from a pair of the shoulder blocks of the tire.

[0026] In an embodiment of the present invention, a pair of the filling layers may be spaced apart to have a gap of 70 to 80 percent of the width of the belt layer located on the outermost side in the radial direction of the tire.

[0027] In an embodiment of the present invention, the width of the filling layer may be provided to extend from the end of the belt layer located at the innermost radial direction of the tire to a position spaced 20 to 25 mm in the width direction of the belt layer.

[0028]

[0029] The effect of the present invention according to the above configuration is that the rigidity of the tread and driving performance can be improved compared to conventional open-pitch tires.

[0030] In addition, according to the present invention, the rolling resistance of the tire is improved and noise is reduced at the same time.

[0031] 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 configuration of the invention described in the detailed description of the invention or the claims.

[0032]

[0033] FIG. 1 is an exemplary diagram of a tire according to a first embodiment of the present invention.

[0034] FIG. 2 is an exemplary diagram of a tire according to a second embodiment of the present invention.

[0035] FIG. 3 is an exemplary diagram of a tire according to a third embodiment of the present invention.

[0036] FIG. 4 is an exemplary diagram of a reinforcing belt layer according to a third embodiment of the present invention.

[0037] FIG. 5 is an exemplary diagram of a tire according to the fourth embodiment of the present invention.

[0038] FIG. 6 is an exemplary diagram of a tire according to the fifth embodiment of the present invention.

[0039] Figure 7 is a graph showing the natural frequency bands of the comparative example and the example.

[0040] Figure 8 is a graph showing the harmony band where resonance sounds occur in the comparative example and the example.

[0041] Figure 9 is a graph showing the magnitude of the resonance sound according to the harmony band.

[0042] Figure 10 is a table showing the magnitude of the natural frequency according to the material of the reinforcing belt layer.

[0043] Figure 11 is a table showing the magnitude of the natural frequency according to the material and structure of the reinforcing belt.

[0044] Figure 12 is a table showing the rotational resistance of the comparative example and the example.

[0045] Figure 13 is a graph showing the rotational resistance of the comparative example and the example.

[0046]

[0047] The tire having a noise-reducing reinforcing belt according to the present invention is characterized by comprising: a belt layer provided radially inward from the tread in contact with the ground; a reinforcing belt layer disposed radially outward from the belt layer; a carcass layer provided radially inward from the belt layer; and a filling layer provided between the carcass layer and the inner liner.

[0048]

[0049] The present invention will be described below with reference to the attached drawings. However, the present invention can be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0050] Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0051] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0052] Additionally, terms such as "...part," "...unit," and "...module" described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software.

[0053] Additionally, in this specification, when a step is described as being located "before" or "after" another step, this includes not only cases where a step is in a direct chronological relationship with another step, but also cases where there is an indirect chronological relationship in which the chronological order of the two steps may change, such as a mixing step following each step.

[0054]

[0055] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0056] FIG. 1 is an exemplary diagram of a tire according to a first embodiment of the present invention.

[0057] Referring to FIG. 1, a tire (100) according to the first embodiment may include a belt layer (110), a reinforcing belt layer (120), a carcass layer (140), a filling layer (150), an inner liner (160), and a tread (170).

[0058] The above belt layer (110) may be provided radially inward from the tread in contact with the ground and may consist of a plurality of belts.

[0059] For example, the belt layer (110) may include a first belt layer (111) and a second belt layer (112).

[0060] The first belt layer (111) and the second belt layer (112) may be extended in a toroidal shape in the width direction of the tie, and the first belt layer (111) may be extended to be the same length as or longer than the second belt layer (112).

[0061] The reinforcing belt layer (120) is positioned radially outward from the belt layer (110) and can be extended to completely cover the radially outward side of the belt layer (110).

[0062] The above reinforcing belt layer (120) may consist of a fabric cord and a topping rubber surrounding it.

[0063] At this time, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0064] The above carcass layer (140) may be provided radially inward from the belt layer (120) of the tire. The above carcass layer (140) forms the framework of the tire and may be provided to consist of a cord layer wrapped in rubber.

[0065] More specifically, the carcass layer (140) may be composed of a carcass cord and a carcass topping rubber surrounding the carcass cord.

[0066] The above tread (170) constitutes the part of the tire that contacts the ground and may be provided to have a center block (172) and a shoulder block (173) divided by a plurality of grooves (171) formed along the circumferential direction.

[0067] The above filling layer (150) is provided as a filling sheet and can be provided by being inserted or attached between the carcass layer (140) and the inner liner (160) of the tire.

[0068] The above filling layer (150) can be formed extending along the circumferential direction of the tire between the carcass layer (140) and the inner liner (160) of the tire.

[0069] The above filling layer (150) can be provided to have the same physical properties as the carcass topping rubber. More specifically, the above filling layer (150) can be provided to have the same hardness, strength, and viscoelasticity as the carcass topping rubber.

[0070] For example, the hardness of the carcass topping rubber is 60 to 65, the 100% modulus is 20 to 30, and the 300% modulus is 100 to 135, and the filling layer (150) can also be prepared to have the same physical properties.

[0071] Additionally, the filling layer (150) may be formed to have a width smaller than the width of the first belt layer (111) located at the innermost radial direction of the tire among the belt layers (110).

[0072] More specifically, the filling layer (150) can be formed to have a width of 85 to 90% of the width of the first belt layer (111).

[0073] Additionally, the above-mentioned filling layer (150) may be provided in pairs, and each of the filling layers (150) may be positioned radially inward from the pair of shoulder blocks (173).

[0074] And, the above-mentioned filling layer (150) may be spaced apart from each other to have a gap of 70 to 80% of the width of the second belt layer (112), which is the outermost belt layer in the radial direction of the tire.

[0075] Additionally, the width of the above-mentioned filling layer (150) may be arranged to extend to a position spaced 20 to 25 mm in the width direction of the first belt layer (111) from the end of the first belt layer (111), which is the innermost belt layer in the radial direction of the tire.

[0076]

[0077] FIG. 2 is an exemplary diagram of a tire according to a second embodiment of the present invention.

[0078] Referring to FIG. 2, the tire (200) according to the second embodiment may include a belt layer (210), a reinforcing belt layer (220), a terminal belt layer (230), a carcass layer (240), a filling layer (250), and an inner liner (260).

[0079] The above belt layer (210) may be provided radially inward from the tread in contact with the ground and may consist of a plurality of belts.

[0080] For example, the belt layer (210) may include a first belt layer (211) and a second belt layer (212).

[0081] The first belt layer (211) and the second belt layer (212) may be extended in a toroidal shape in the width direction of the tie, and the first belt layer (211) may be extended to be the same length as or longer than the second belt layer (212).

[0082] The reinforcing belt layer (220) may be formed to extend longitudinally along the belt layer (210) to cover the radially outer side of the tire from the belt layer (210). At this time, the reinforcing belt layer (220) may be provided in multiple numbers and may be spaced apart from each other at a predetermined interval. As a result, the radially outer side of the tire of the belt layer (210) may be provided in a form that is not covered by the reinforcing belt layer (220) at regular intervals and remains open.

[0083] The reinforcing belt layer (220) provided in this manner can be positioned on the inner side of the second belt layer (212) based on the width direction of the tire.

[0084] And, the reinforcing belt layer (220) may be composed of a fabric cord and a topping rubber surrounding it.

[0085] At this time, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0086] The above-mentioned end belt layer (230) is positioned radially outward from the belt layer (210) and can be provided at a position corresponding to both end portions of the belt layer (210).

[0087] The above end belt layer (230) may be formed so as to be spaced apart from the adjacent reinforcing belt layer (220) by a predetermined distance.

[0088] The above-mentioned end belt layer (230) provided in this manner may be positioned on the outer side of both ends of the above-mentioned second belt layer (212) based on the width direction of the tire.

[0089] The above carcass layer (240) may be provided radially inward from the belt layer (220) of the tire. The above carcass layer (240) forms the framework of the tire and may be provided to consist of a cord layer wrapped in rubber.

[0090] More specifically, the carcass layer (240) may be composed of a carcass cord and a carcass topping rubber surrounding the carcass cord.

[0091] The above tread (270) constitutes the part of the tire that contacts the ground and may be provided to have a center block (272) and a shoulder block (273) divided by a plurality of grooves (271) formed along the circumferential direction.

[0092] The above filling layer (250) is provided as a filling sheet and can be provided by being inserted or attached between the carcass layer (240) and the inner liner (260) of the tire.

[0093] The above filling layer (250) can be formed extending along the circumferential direction of the tire between the carcass layer (240) and the inner liner (260) of the tire.

[0094] The above filling layer (250) may be provided to have the same physical properties as the carcass topping rubber. More specifically, the above filling layer (250) may be provided to have the same hardness, strength, and viscoelasticity as the carcass topping rubber.

[0095] For example, the hardness of the carcass topping rubber is 60 to 65, the 100% modulus is 20 to 30, and the 300% modulus is 100 to 135, and the filling layer (250) can also be prepared to have the same physical properties.

[0096] Additionally, the filling layer (250) may be formed to have a width smaller than the width of the first belt layer (211) located at the innermost radial direction of the tire among the belt layers (210).

[0097] More specifically, the filling layer (250) can be formed to have a width of 85 to 90% of the width of the first belt layer (211).

[0098] Additionally, the above-mentioned filling layer (250) may be provided as a pair, and each of the filling layers (250) may be positioned radially inward from the pair of shoulder blocks (273).

[0099] And, the above-mentioned filling layer (250) may be spaced apart from each other to have a gap of 70 to 80 percent of the width of the second belt layer (212), which is the outermost belt layer in the radial direction of the tire.

[0100] Additionally, the width of the above-mentioned filling layer (250) may be arranged to extend to a position spaced 20 to 25 mm in the width direction of the first belt layer (211) from the end of the first belt layer (211), which is the innermost belt layer in the radial direction of the tire.

[0101]

[0102] FIG. 3 is an exemplary diagram of a tire according to a third embodiment of the present invention, and FIG. 4 is an exemplary diagram of a reinforcing belt layer according to a third embodiment of the present invention.

[0103] Referring to FIGS. 3 and 4, a tire (300) according to the third embodiment may include a belt layer (310), a reinforcing belt layer (320), a terminal belt layer (330), a carcass layer (340), a filling layer (350), and an inner liner (360).

[0104] The above belt layer (310) may be provided radially inward from the tread in contact with the ground and may consist of a plurality of belts.

[0105] For example, the belt layer (310) may include a first belt layer (311) and a second belt layer (312).

[0106] The first belt layer (311) and the second belt layer (312) may be extended in a toroidal shape in the width direction of the tie, and the first belt layer (311) may be extended to be the same length as or longer than the second belt layer (312).

[0107] The reinforcing belt layer (320) is positioned radially outward from the belt layer (310) and may include a winding portion (321) and an open portion (325) alternately arranged along the width direction of the tire.

[0108] The above-mentioned winding portion (321) is a portion where a strap is wound, and is provided so that adjacent straps partially overlap, and may include a first strap (322), a second strap (323), and an overlapping portion (324).

[0109] The first strap (322) can be arranged to be wound radially outward from the belt layer (310).

[0110] The second strap (323) is provided to be wound radially outward from the belt layer (310) and can be provided to be wound adjacent to the first strap (322).

[0111] The above-mentioned overlapping portion (324) may be formed such that the adjacent first strap (322) and the second strap (323) overlap each other.

[0112] At this time, the overlapping portion (324) may be formed by overlapping by 25 to 35% of the width of the first strap (322) and the second strap (323). Preferably, the overlapping portion (324) may be overlapped by 30% of the width of the first strap (322) and the second strap (323).

[0113] For example, the width of the first strap (322) and the second strap (323) may be 10 mm, and the width of the overlapping portion (324) may be 3 mm.

[0114] The above-mentioned open portion (325) is a portion where the strap is not discharged and can be provided between a pair of the above-mentioned winding portions (321).

[0115] The above-mentioned open portion (325) may be provided in a range of 45 to 55% of the width of the first strap (322) and the second strap (323), and preferably in a range of 50%.

[0116] For example, when the width of the first strap (322) and the second strap (323) is 10 mm, the width of the open portion (325) can be 5 mm.

[0117] The reinforcing belt layer (320) provided in this manner can be positioned on the inner side of the second belt layer (312) based on the width direction of the tire.

[0118] The above reinforcing belt layer (320) may be composed of a fabric cord and a topping rubber surrounding it.

[0119] At this time, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0120] The above-mentioned end belt layer (330) is positioned radially outward from the belt layer (310) and can be provided at a position corresponding to both end portions of the belt layer (310).

[0121] The above end belt layer (330) may be formed such that adjacent straps partially overlap and are spaced apart from adjacent reinforcing belt layers (320) by a predetermined distance.

[0122] Specifically, the end belt layer (330) according to the third embodiment may be provided with the same configuration as the winding portion (321) of the reinforcing belt layer (320).

[0123] And, the end belt layer (330) may be spaced apart from the reinforcing belt layer (320) by a predetermined distance, for example, it may be formed spaced apart by the same distance as the open portion (325).

[0124] The above-mentioned end belt layer (330) provided in this manner may be positioned on the outer side of both ends of the above-mentioned second belt layer (312) based on the width direction of the tire.

[0125] The above carcass layer (340) may be provided radially inward from the belt layer (320) of the tire. The above carcass layer (340) forms the framework of the tire and may be provided to consist of a cord layer wrapped in rubber.

[0126] More specifically, the carcass layer (340) may be composed of a carcass cord and a carcass topping rubber surrounding the carcass cord.

[0127] The above tread (370) constitutes the part of the tire that contacts the ground and may be provided to have a center block (372) and a shoulder block (373) divided by a plurality of grooves (371) formed along the circumferential direction.

[0128] The above filling layer (350) is provided as a filling sheet and can be provided by being inserted or attached between the carcass layer (340) and the inner liner (30) of the tire.

[0129] The above filling layer (350) can be formed extending along the circumferential direction of the tire between the carcass layer (340) and the inner liner (360) of the tire.

[0130] The above filling layer (350) may be provided to have the same physical properties as the carcass topping rubber. More specifically, the above filling layer (350) may be provided to have the same hardness, strength, and viscoelasticity as the carcass topping rubber.

[0131] For example, the hardness of the carcass topping rubber is 60 to 65, the 100% modulus is 20 to 30, and the 300% modulus is 100 to 135, and the filling layer (350) can also be prepared to have the same physical properties.

[0132] Additionally, the filling layer (350) may be formed to have a width smaller than the width of the first belt layer (311) located at the innermost radial direction of the tire among the belt layers (310).

[0133] More specifically, the filling layer (350) can be formed to have a width of 85 to 90% of the width of the first belt layer (311).

[0134] Additionally, the above-mentioned filling layer (350) may be provided as a pair, and each of the above-mentioned filling layers (350) may be positioned radially inward from the pair of above-mentioned shoulder blocks (373).

[0135] And, the above-mentioned filling layer (350) may be spaced apart from each other to have a gap of 70 to 80% of the width of the second belt layer (312), which is the outermost belt layer in the radial direction of the tire.

[0136] Additionally, the width of the above-mentioned filling layer (350) may be arranged to extend to a position spaced 20 to 25 mm in the width direction of the first belt layer (311) from the end of the first belt layer (311), which is the innermost belt layer in the radial direction of the tire.

[0137]

[0138] FIG. 5 is an exemplary diagram of a tire according to the fourth embodiment of the present invention.

[0139] Referring to FIG. 5, the tire (400) according to the fourth embodiment may include a belt layer (410), a reinforcing belt layer (420), a terminal belt layer (430), a carcass layer (440), a filling layer (450), and an inner liner (460).

[0140] The belt layer (410) may be provided radially inward from the tread in contact with the ground and may include a first belt layer (411) and a second belt layer (412).

[0141] The first belt layer (411) and the second belt layer (412) may be extended in a toroidal shape in the width direction of the tie, and the first belt layer (411) may be extended longer than or equal to the length of the second belt layer (412).

[0142] The reinforcing belt layer (420) is positioned radially outward from the belt layer (410) and may include a winding portion (421) and an open portion (425) alternately arranged along the width direction of the tire.

[0143] The above-mentioned winding portion (421) is a portion where a strap is wound, and is provided so that adjacent straps partially overlap, and may include a first strap (422), a second strap (423), and an overlapping portion (424).

[0144] The first strap (422) can be arranged to be wound radially outward from the belt layer (410).

[0145] The second strap (423) is provided to be wound radially outward from the belt layer (410) and can be provided to be wound adjacent to the first strap (422).

[0146] The above-mentioned overlapping portion (424) may be formed such that the adjacent first strap (422) and the second strap (423) overlap each other.

[0147] At this time, the overlapping portion (424) may be formed by overlapping by 25 to 35% of the width of the first strap (422) and the second strap (423). Preferably, the overlapping portion (424) may be overlapped by 30% of the width of the first strap (422) and the second strap (423).

[0148] For example, the width of the first strap (422) and the second strap (423) may be 10 mm, and the width of the overlapping portion (424) may be 3 mm.

[0149] The above-mentioned open portion (425) is a portion where the strap is not discharged and can be provided between a pair of the above-mentioned winding portions (421).

[0150] The above-mentioned open portion (425) may be provided in a range of 45 to 55% of the width of the first strap (422) and the second strap (423), and preferably in a range of 50%.

[0151] For example, when the width of the first strap (422) and the second strap (423) is 10 mm, the width of the open portion (425) can be provided as 5 mm.

[0152] The reinforcing belt layer (420) provided in this manner can be positioned on the inner side of the second belt layer (412) based on the width direction of the tire.

[0153] The above reinforcing belt layer (420) may be composed of a fabric cord and a topping rubber surrounding it.

[0154] At this time, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0155] The above-mentioned end belt layer (430) is positioned radially outward from the belt layer (410) and can be provided at a position corresponding to both end portions of the belt layer (410).

[0156] The above-mentioned end belt layer (430) includes a third strap (431) wound radially outward from the belt layer (410) and a fourth strap (432) wound adjacent to the third strap (431), and the second strap (431) and the fourth strap (432) may be formed to extend as a single layer without overlapping parts.

[0157] And, the end belt layer (430) may be spaced apart from the reinforcing belt layer (420) by a predetermined distance, for example, it may be formed spaced apart by the same distance as the open portion (425).

[0158] The above-described end belt layer (430) provided in this manner may be provided to extend from both ends of the second belt layer (412) to the outer side of the end of the first belt layer (411) based on the width direction of the tire. The total length of the above-described end belt layer (430) may be provided as 200% of the length of the first strap (422).

[0159] The above carcass layer (440) may be provided radially inward from the belt layer (420) of the tire. The above carcass layer (440) forms the framework of the tire and may be provided to consist of a cord layer wrapped in rubber.

[0160] More specifically, the carcass layer (440) may be composed of a carcass cord and a carcass topping rubber surrounding the carcass cord.

[0161] The above tread (470) constitutes the part of the tire that contacts the ground and may be provided to have a center block (472) and a shoulder block (473) divided by a plurality of grooves (471) formed along the circumferential direction.

[0162] The above filling layer (450) is provided as a filling sheet and can be provided by being inserted or attached between the carcass layer (440) and the inner liner (460) of the tire.

[0163] The above filling layer (450) can be formed extending along the circumferential direction of the tire between the carcass layer (440) and the inner liner (460) of the tire.

[0164] The above filling layer (450) may be provided to have the same physical properties as the carcass topping rubber. More specifically, the above filling layer (450) may be provided to have the same hardness, strength, and viscoelasticity as the carcass topping rubber.

[0165] For example, the hardness of the carcass topping rubber is 60 to 65, the 100% modulus is 20 to 30, and the 300% modulus is 100 to 135, and the filling layer (450) can also be prepared to have the same physical properties.

[0166] Additionally, the filling layer (450) may be formed to have a width smaller than the width of the first belt layer (411) located at the innermost radial end of the tire among the belt layers (410).

[0167] More specifically, the filling layer (450) can be formed to have a width of 85 to 90% of the width of the first belt layer (411).

[0168] Additionally, the above-mentioned filling layer (450) may be provided in pairs, and each of the above-mentioned filling layers (450) may be positioned radially inward from the pair of above-mentioned shoulder blocks (473).

[0169] And, the above-mentioned filling layer (450) may be spaced apart from each other to have a gap of 70 to 80 percent of the width of the second belt layer (412), which is the outermost belt layer in the radial direction of the tire.

[0170] Additionally, the width of the above-mentioned filling layer (450) may be arranged to extend to a position spaced 20 to 25 mm in the width direction of the first belt layer (411) from the end of the first belt layer (411), which is the innermost belt layer in the radial direction of the tire.

[0171]

[0172] FIG. 6 is an exemplary diagram of a tire according to the fifth embodiment of the present invention.

[0173] Referring to FIG. 6, the tire (500) according to the fifth embodiment may include a belt layer (510), a reinforcing belt layer (520), a terminal belt layer (530), a carcass layer (540), a filling layer (550), and an inner liner (560).

[0174] The belt layer (510) may be provided radially inward from the tread in contact with the ground and may include a first belt layer (511) and a second belt layer (512).

[0175] The first belt layer (511) and the second belt layer (512) may be extended in a toroidal shape in the width direction of the tie, and the first belt layer (511) may be extended longer than or equal to the second belt layer (512).

[0176] The reinforcing belt layer (520) is positioned radially outward from the belt layer (510) and may include a winding portion (521) and an open portion (525) alternately arranged along the width direction of the tire.

[0177] The above-mentioned winding portion (521) is a portion where a strap is wound, and is provided so that adjacent straps partially overlap, and may include a first strap (522), a second strap (523), and an overlapping portion (524).

[0178] The first strap (522) can be arranged to be wound radially outward from the belt layer (510).

[0179] The second strap (523) is provided to be wound radially outward from the belt layer (510) and can be provided to be wound adjacent to the first strap (522).

[0180] The above-mentioned overlapping portion (524) may be formed such that the adjacent first strap (522) and the second strap (523) overlap each other.

[0181] At this time, the overlapping portion (524) may be formed by overlapping by 25 to 35% of the width of the first strap (522) and the second strap (523). Preferably, the overlapping portion (524) may be overlapped by 30% of the width of the first strap (522) and the second strap (523).

[0182] For example, the width of the first strap (522) and the second strap (523) may be 10 mm, and the width of the overlapping portion (524) may be 3 mm.

[0183] The above-mentioned open portion (525) is a portion where the strap is not discharged and can be provided between a pair of the above-mentioned winding portions (521).

[0184] The above-mentioned open portion (525) may be provided in a range of 45 to 55% of the width of the first strap (522) and the second strap (523), and preferably in a range of 50%.

[0185] For example, when the width of the first strap (522) and the second strap (523) is 10 mm, the width of the open portion (525) can be provided as 5 mm.

[0186] The reinforcing belt layer (520) provided in this manner can be positioned on the inner side of the second belt layer (512) based on the width direction of the tire.

[0187] The above reinforcing belt layer (520) may be composed of a fabric cord and a topping rubber surrounding it.

[0188] At this time, the fabric cord may be made of one or more of Nylon, Aramid, and PET.

[0189] The above-mentioned end belt layer (530) is positioned radially outward from the belt layer (510) and can be provided at a position corresponding to both end portions of the belt layer (510).

[0190] The above-mentioned end belt layer (530) includes a fifth strap (531) wound radially outward from the belt layer (510) and a sixth strap (532) wound adjacent to the fifth strap (531), and the fifth strap (531) and the sixth strap (532) may be arranged to form an overlapping portion that partially overlaps.

[0191] Specifically, the fifth strap (531) and the sixth strap (532) may be arranged so that 50 to 60 percent of the width of the fifth strap (531) and the sixth strap (532) overlap. Preferably, 55 percent overlap may be possible.

[0192] In addition, the fifth strap (531) and the sixth strap (532) may be provided in multiple numbers, and the fifth strap (531) and the sixth strap (532) may be provided in an alternating manner and may be provided as straps of the same width.

[0193] Additionally, the fifth strap (531) and the sixth strap (532) may be arranged so that a plurality of adjacent straps overlap each other without an open portion.

[0194] The above-described end belt layer (530) provided in this manner may be provided to extend from both ends of the second belt layer (412) to the outer side of the end of the first belt layer (511) based on the width direction of the tire. At this time, the above-described end belt layer (530) may be provided such that its total length in the width direction of the tire is within 30 mm.

[0195] As such, the above-mentioned end belt layer (530) can be arranged to be formed from 1 to 3 layers depending on the overlap range.

[0196] The above carcass layer (540) may be provided radially inward from the belt layer (520) of the tire. The above carcass layer (540) forms the framework of the tire and may be provided to consist of a cord layer wrapped in rubber.

[0197] More specifically, the carcass layer (540) may be composed of a carcass cord and a carcass topping rubber surrounding the carcass cord.

[0198] The above tread (570) constitutes the part of the tire that contacts the ground and may be provided to have a center block (572) and a shoulder block (573) divided by a plurality of grooves (571) formed along the circumferential direction.

[0199] The above filling layer (550) is provided as a filling sheet and can be provided by being inserted or attached between the carcass layer (540) and the inner liner (560) of the tire.

[0200] The above filling layer (550) can be formed extending along the circumferential direction of the tire between the carcass layer (540) and the inner liner (560) of the tire.

[0201] The above filling layer (550) may be provided to have the same physical properties as the carcass topping rubber. More specifically, the above filling layer (550) may be provided to have the same hardness, strength, and viscoelasticity as the carcass topping rubber.

[0202] For example, the hardness of the carcass topping rubber is 60 to 65, the 100% modulus is 20 to 30, and the 300% modulus is 100 to 135, and the filling layer (550) can also be prepared to have the same physical properties.

[0203] Additionally, the filling layer (550) may be formed to have a width smaller than the width of the first belt layer (511) located at the innermost radial direction of the tire among the belt layers (510).

[0204] More specifically, the filling layer (550) can be formed to have a width of 85 to 90% of the width of the first belt layer (511).

[0205] Additionally, the above-mentioned filling layer (550) may be provided as a pair, and each of the above-mentioned filling layers (550) may be positioned radially inward from the pair of above-mentioned shoulder blocks (573).

[0206] And, the above-mentioned filling layer (550) may be spaced apart from each other to have a gap of 70 to 80% of the width of the second belt layer (512), which is the outermost belt layer in the radial direction of the tire.

[0207] Additionally, the width of the above-mentioned filling layer (550) may be provided to extend to a position spaced 20 to 25 mm in the width direction of the first belt layer (511) from the end of the first belt layer (511), which is the innermost belt layer in the radial direction of the tire.

[0208] Meanwhile, one of the above-described winding portions (321, 421, 521) can be provided at a position corresponding to the groove located between the center block and the shoulder block. The winding portions (321, 421, 521) provided in this manner can prevent the separation phenomenon of the tread and strengthen rigidity.

[0209]

[0210] Figure 7 is a graph showing the natural frequency bands of the comparative example and the example.

[0211] Referring to FIG. 7, the comparative example is a conventional tire without the above-mentioned filling layer (350, 250, 350), and the embodiment is a tire according to the present invention. Looking at FIG. 7, it can be seen that the shape of the graph of the embodiment is shifted to the left compared to the comparative example. Due to the attachment of the above-mentioned filling layer, the stiffness of the tire is lowered, and the natural frequency band is shifted to the left overall.

[0212] Figure 8 is a graph showing the harmony band where resonance sounds occur in the comparative example and the example, and Figure 9 is a graph showing the magnitude of the resonance sound according to the harmony band.

[0213] Referring to FIGS. 8 and 9, the resonance of the tire occurs in the frequency range of 200 to 230 Hz. While the conventional tire according to the comparative example generates resonance at the 5th to 6th harmony, the embodiment generates resonance at the 6th to 7th harmony band. It can be confirmed by the graph that the resonance in the 6th to 7th harmony band has a reduction effect.

[0214] Figure 10 is a table showing the magnitude of the natural frequency according to the material of the reinforcing belt.

[0215] Referring to Fig. 10, it can be seen that when the reinforcing belt is simulated with three different materials, the natural frequency of the N840D / 2 material according to the present invention is measured to be the lowest.

[0216] Figure 11 is a table showing the magnitude of the natural frequency according to the material and structure of the reinforcing belt.

[0217] Referring to Fig. 11, when the reinforcing belt is made of N1260D / 2 and N840D / 2 materials, it can be seen that the natural frequency of the tire is measured lower when the reinforcing belt is made of the JP0(5)0 structure with an open pitch structure in the middle, as in the embodiment of the present invention, compared to the JF5 structure without an open pitch.

[0218] FIG. 12 is a table showing the rotational resistance of the comparative example and the example, and FIG. 13 is a graph showing the rotational resistance of the comparative example and the example.

[0219] Referring to FIGS. 12 and FIGS. 13, it can be seen that the rolling resistance of the embodiment of the present invention at T3 is improved by about 5 to 6% compared to the comparative example at T1.

[0220] As such, according to the present invention, a filling layer (350, 250, 350) is provided, and by optimizing the material of the reinforcing belt layer to lower the stiffness, the frequency band is shifted, thereby improving rolling resistance and reducing noise.

[0221]

[0222] Although the foregoing description of the present invention has been illustrated with reference to the drawings, it is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form. Furthermore, the described techniques may be performed in a different order than the described method.

[0223] The embodiments described in this specification and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention. Accordingly, the scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

[0224]

[0225] <Explanation of Symbols>

[0226] 100: Tires

[0227] 110: Belt layer

[0228] 111: 1st belt layer

[0229] 112: Second belt layer

[0230] 120: Reinforcement belt layer

[0231] 121: Winding section

[0232] 122: First Strap

[0233] 123: Second Strap

[0234] 124: Overlapping part

[0235] 125: Open section

[0236] 130: End belt layer

[0237] 140: Cacaos layer

[0238] 150: Peeling layer

[0239] 160: Inner liner

[0240] 170: Tread

[0241] 171: Groove

[0242] 172: Center Block

[0243] 173: Shoulder Block

[0244]

[0245] 200: Tires

[0246] 210: Belt layer

[0247] 211: 1st belt layer

[0248] 212: Second belt layer

[0249] 220: Reinforcement belt layer

[0250] 221: Winding unit

[0251] 222: 1st Strap

[0252] 223: Second Strap

[0253] 224: Overlapping part

[0254] 225: Open section

[0255] 230: End belt layer

[0256] 231: The 3rd Strap

[0257] 232: The 4th Strap

[0258] 240: Kakas layer

[0259] 250: Peeling layer

[0260] 260: Innerliner

[0261] 270: Tread

[0262] 271: Groove

[0263] 272: Center Block

[0264] 273: Shoulder Block

[0265]

[0266] 300: Tires

[0267] 310: Belt layer

[0268] 311: 1st belt layer

[0269] 312: Second belt layer

[0270] 320: Reinforcement belt layer

[0271] 321: Winding unit

[0272] 322: 1st Strap

[0273] 323: Second Strap

[0274] 324: Overlapping part

[0275] 325: Open section

[0276] 330: End belt layer

[0277] 331: The 5th Strap

[0278] 332: 6th Strap

[0279] 340: Cacaos layer

[0280] 350: Peeling layer

[0281] 360: Inner Liner

[0282] 370: Tread

[0283] 371: Groove

[0284] 372: Center Block

[0285] 373: Shoulder Block

[0286]

[0287] 400: Tires

[0288] 410: Belt layer

[0289] 411: 1st belt layer

[0290] 412: 2nd belt layer

[0291] 420: Reinforcement belt layer

[0292] 421: Winding section

[0293] 422: 1st Strap

[0294] 423: Second Strap

[0295] 424: Overlapping part

[0296] 425: Open section

[0297] 430: End belt layer

[0298] 431: Third Strap

[0299] 432: The 4th Strap

[0300] 440: Cacaos layer

[0301] 450: Peeling layer

[0302] 460: Innerliner

[0303] 470: Tread

[0304] 471: Groove

[0305] 472: Center Block

[0306] 473: Shoulder Block

[0307]

[0308] 500: Tires

[0309] 510: Belt layer

[0310] 511: 1st belt layer

[0311] 512: 2nd belt layer

[0312] 520: Reinforcement belt layer

[0313] 521: Winding unit

[0314] 522: 1st Strap

[0315] 523: Second Strap

[0316] 524: Overlapping section

[0317] 525: Open section

[0318] 530: End belt layer

[0319] 531: The 5th Strap

[0320] 532: 6th Strap

[0321] 540: Cacaos layer

[0322] 550: Peeling layer

[0323] 560: Innerliner

[0324] 570: Tread

[0325] 571: Groove

[0326] 572: Center Block

[0327] 573: Shoulder Block

Claims

1. A belt layer provided on the radially inner side of the tire from the tread in contact with the ground; A reinforcing belt layer disposed radially outward from the above belt layer; A carcass layer provided radially inward from the belt layer above; and A tire having a noise-reducing reinforcing belt characterized by including a filling layer provided between the carcass layer and the inner liner.

2. In Paragraph 1, The above belt layer is, It consists of multiple belts, A tire having a noise-reducing reinforcing belt, characterized in that the width of the filling layer is formed to be smaller than the width of the first belt layer located radially innermost among a plurality of belts.

3. In Paragraph 1, The above carcass layer is, It consists of a carcass cord and a carcass topping rubber surrounding it, and A tire having a noise-reducing reinforcing belt, characterized in that the above-mentioned filling layer has the same physical properties as the above-mentioned carcass topping rubber.

4. In Paragraph 1, The above reinforcing belt layer is, A tire having a noise-reducing reinforcing belt, characterized by having a winding portion where a strap is discharged and an open portion where the strap is not discharged, provided along the width direction of the tire.

5. In Paragraph 4, The above winding unit is, A tire having a noise-reducing reinforcing belt characterized by being formed to include an overlapping portion in which adjacent straps partially overlap.

6. In Paragraph 5, The above winding unit is, A first strap wound radially outward from the above belt; A second strap wound adjacent to the first strap; and A tire having a noise-reducing reinforcing belt characterized by including the overlapping portion formed by the first strap and the second strap overlapping.

7. In Paragraph 6, A tire having a noise-reducing reinforcing belt, characterized in that the overlapping portion is 30% of the width of the first strap and the second strap.

8. In Paragraph 6, Among the above reinforcing belt layers, the open portion provided between adjacent winding portions where the strap is not discharged is, A tire having a noise-reducing reinforcing belt characterized by being 50% of the width of the first strap and the second strap.

9. In Paragraph 1, The above reinforcing belt layer is, A tire having a noise-reducing reinforcing belt characterized by being composed of a fabric cord and a topping rubber surrounding it.

10. In Paragraph 9, The above fabric cord is, A tire having a noise-reducing reinforcing belt characterized by being made of one or more of Nylon, Aramid, and PET.

11. In Paragraph 1, The above tread includes a center block and a shoulder block formed by dividing by a plurality of grooves, and A tire having a noise-reducing reinforcing belt, characterized in that the above-mentioned filling layer is located radially inward from a pair of the above-mentioned shoulder blocks.

12. In Paragraph 11, A pair of the above-mentioned filling layers, A tire having a noise-reducing reinforcing belt, characterized by being spaced apart to have a gap of 70 to 80 percent of the width of the belt layer located at the outermost radial side of the tire.

13. In Paragraph 11, The width of the above filling layer is, A tire having a noise-reducing reinforcing belt characterized by being arranged to extend from the end of the belt layer located at the innermost radial end of the tire to a position spaced 20 to 25 mm in the width direction of the belt layer.

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