A pneumatic tire

Abstract

The present invention relates to a pneumatic tire for a vehicle, and more specifically, to a pneumatic tire having a sound-absorbing material that is stably installed. Accordingly, the present invention provides a pneumatic tire comprising a tread portion (100), a sidewall portion (200), and a bead portion (300), wherein an inner liner layer (400) is installed inside the tire, one or more rod-shaped fixing structures (500) for fixing a sound-absorbing material (600) are installed on the inner liner layer (400), and the sound-absorbing material (600) is coupled to and fixedly installed on the rod-shaped fixing structures (500).

Description

Technology Field

[0001] The present invention relates to a pneumatic tire for a vehicle, and more specifically, to a pneumatic tire having a sound-absorbing material that is stably installed. Background Technology

[0003] With the transition from internal combustion engine-based vehicles to electric motor-based intelligent vehicle systems, tires have become required not only to transmit driving power, maintain air pressure, and support loads, but also to produce low noise and receive signals from the external environment.

[0004] However, tires are composed of a multi-layer structure. As they are the only part where the vehicle comes into contact with the ground, high reliability is critical, which limits the addition of devices. Currently, most mounting structures are provided by attaching additional structures to frequently deformed and large parts through a secondary process after tire manufacturing, such as the pocket structure receiver disclosed in U.S. Patent No. 9016118 (published June 28, 2011) or the tire of the prior art indicating the mounting location of additional structures for contact-type signal reception and noise reduction.

[0005] However, as mentioned above, when applying a pocket-structured receptor, there is a problem in that the size of the additional structure is limited by the size of the pocket.

[0006] In addition, when additional structures are installed through additional processes that are prone to containing defects in parts of the tire that are frequently deformed, there is a possibility that they may be damaged due to tire deformation, aging, and impact. Such damage can become the starting point of cracks or cause unexpected noise, thereby having a direct impact on accidents.

[0007] In addition, due to the diverse tire usage environments and long usage times, there is a problem in that it is difficult for manufacturers and workers to identify the possibility of adhesive defects in advance.

[0008] In addition, when additional structures are installed through secondary processing after the tire is manufactured, there is a problem in that partial replacement and repair of the device is difficult. Furthermore, since the manufacturer and workers perform the work in advance, there is also a problem in that it is difficult to respond to the diverse requirements of the end user.

[0009] Therefore, reliable mounting technology for additional structures is required for tire usage.

[0010] Korean Registered Patent No. 10-1775797, titled "Tire Sound-Absorbing Material Fixing Structure Equipped with Sound-Absorbing Material Fixing Bands and Tire Manufactured Including the Same," relates to a sound-absorbing material fixing structure for a tire and a method for manufacturing the same for attaching and fixing a sound-absorbing material to a tire. More specifically, the invention provides a technology for a sound-absorbing material fixing structure comprising a plurality of sound-absorbing material fixing bands, each comprising a sound-absorbing material for reducing noise generated inside the tire, a connecting part made of a stretchable material that is coupled to the inner surface of the tire, and a pressing part that functions to press the sound-absorbing material against the inner liner of the tire and maintain the state of contact. The pressing part applies downward pressure to the upper surface of the sound-absorbing material as it expands and contracts, and since a separate adhesive layer is not applied, the sound-absorbing material attachment process is facilitated, and the sound-absorbing material can be firmly attached and fixed to the inner surface of the tire without damaging the tire. However, the above technology had a problem in that residual vibrations occurred during the pressing and contracting process.

[0011] Korean Patent Publication No. 10-2021-0022383, "Tire including sealant layer and sound-absorbing layer," relates to a tire including a sealant layer and a sound-absorbing layer. More specifically, the tire comprises a sound-absorbing layer attached to the inner surface of the tire; and a sealant layer disposed between the inner surface of the tire and the sound-absorbing layer, the sealant layer having a sealant that attaches the sound-absorbing layer to the inner surface of the tire, wherein the sound-absorbing layer comprises a non-woven fabric. However, the above technology had the disadvantage that the installation of the sound-absorbing layer was not easy. Prior art literature

[0013] Republic of Korea Registered Patent No. 10-1775797 'Tire sound-absorbing material fixing structure equipped with a sound-absorbing material fixing band and tire manufactured including the same' Registration Date: August 31, 2017 Republic of Korea Published Patent No. 10-2021-0022383 'Tire including a sealant layer and a sound-absorbing material layer' Publication Date: March 3, 2021 The problem to be solved

[0014] Therefore, the present invention aims to solve the problems of the aforementioned prior art and has the technical objective of providing an air-filled tire that enables the stable installation of sound-absorbing material on the inner side of the tire. means of solving the problem

[0016] One embodiment of the present invention for achieving the above-described purpose provides an air-filled tire comprising a tread portion (100), a sidewall portion (200), and a bead portion (300), wherein an inner liner layer (400) is installed inside the tire, and one or more rod-shaped fixing structures (500) are installed to fix a sound-absorbing material (600) to the inner liner layer (400), and the sound-absorbing material (600) is coupled to and fixedly installed on the rod-shaped fixing structures (500). Effects of the invention

[0018] The air-filled tire according to one embodiment of the present invention described above can expect the effect of increasing resistance to movement by increasing the rigidity of the device using a sound-absorbing material fixing structure to counteract the movement that occurs as the height of the sound-absorbing material increases.

[0019] In addition, by increasing the resistance to movement, the problem of reduced fatigue durability due to the lateral movement of the sound-absorbing material can be prevented, and residual vibrations can be prevented.

[0020] Furthermore, the present invention provides a method of fixing the sound-absorbing material such as a snap-fit ​​method or a method using a sound-absorbing material fixing cap, thereby providing the effect of stably fixing the sound-absorbing material.

[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 configuration of the invention described in the detailed description of the invention or the claims. Brief explanation of the drawing

[0023] FIG. 1 is a cross-sectional view of a key part of an embodiment in which a fixing structure of an air-filled tire according to the present invention is installed in an inner liner layer. FIG. 2 is a cross-sectional view of a key part of an embodiment in which a fixing structure of an air-filled tire according to the present invention is inserted and installed in a socket. FIG. 3 is a perspective view of the fixing structure of the air-filled tire of the present invention. FIG. 4 is a perspective view of an embodiment in which a sound-absorbing material is combined with a fixing structure of an air-filled tire according to the present invention. FIG. 5 is a perspective view of another embodiment in which a sound-absorbing material is combined with a fixing structure of an air-filled tire according to the present invention. FIG. 6 is a perspective view of another embodiment in which a sound-absorbing material is combined with a fixing structure of an air-filled tire according to the present invention. FIG. 7 is a cross-sectional view showing the first and second embodiments of the installation location of the fixing structure of the pneumatic tire of the present invention. FIG. 8 is a cross-sectional view showing the third and fourth embodiments of the installation location of the fixing structure of the pneumatic tire of the present invention. FIG. 9 is a cross-sectional view showing the first and second embodiments of the installation of sound-absorbing material. FIG. 10 is a cross-sectional view showing the third and fourth embodiments of the installation of sound-absorbing material. Specific details for implementing the invention

[0024] In the following description of the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0025] Since embodiments according to the concept of the present invention may be subject to various modifications and may 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 specific disclosed forms, and it should be understood that the present invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention.

[0026] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0027] 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 specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, 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.

[0028] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings illustrating embodiments of the present invention.

[0030] FIG. 1 is a cross-sectional view of a key part of an embodiment in which a fixing structure of an air-filled tire of the present invention is installed in an inner liner layer, and FIG. 2 is a cross-sectional view of a key part of an embodiment in which a fixing structure of an air-filled tire of the present invention is inserted and installed in a socket.

[0031] The present invention provides an air-filled tire comprising a tread portion (100), a sidewall portion (200), and a bead portion (300), wherein an inner liner layer (400) is installed inside the tire, and one or more rod-shaped fixing structures (500) are installed to fix a sound-absorbing material (600) to the inner liner layer (400), and the sound-absorbing material (600) is coupled to and fixedly installed on the rod-shaped fixing structures (500).

[0032] According to the above configuration, the behavior occurring as the height of the sound-absorbing material (300) increases is controlled by using a sound-absorbing material fixing structure (500). The rigidity of the device can be increased to increase resistance to movement. By increasing resistance, the problem of reduced durability caused by fatigue due to the lateral movement of the sound-absorbing material (600) can be prevented, and the effect of preventing residual vibration can be expected.

[0033] Accordingly, it is preferable that the height (h1) of the sound-absorbing material (600) be 15 to 70% of the tire height (h2), and the width (w1) be 10 to 70% of the tire width (w2). If the height and width of the sound-absorbing material (600) are excessively large, there is a risk of residual vibrations occurring due to irregular movement during driving. Therefore, the above numerical limitations are significant.

[0035] FIG. 1 illustrates an embodiment in which the fixed structure (500) is installed on the inner liner layer (400) using an adhesive attachment method.

[0036] As illustrated in FIG. 1, an adhesive layer is formed between the bottom surface of the bottom edge (510) of the fixed structure (500) and the surface of the inner liner layer (400), so that the bottom edge (510) can be easily joined to the inner liner layer (400).

[0037] Alternatively, as illustrated in FIG. 2, the present invention may have a socket (410) formed on the surface of the inner liner layer (400) having a space for receiving the bottom edge (510), wherein the socket (410) may be molded integrally with the inner liner layer (400). Such a structure requires a brader of a corresponding shape during the vulcanization of the tire. Alternatively, the socket (410) may be manufactured separately and attached to the surface of the inner liner layer (400).

[0038] Additionally, the bottom end (510) of the fixed structure (500) is inserted into the socket (410), thereby providing a configuration in which the fixed structure (500) is fixedly installed inside the tire. If necessary, an adhesive or the like can be injected into the socket (410) to achieve a more secure connection.

[0040] FIG. 3 is a perspective view of a fixing structure of an air-filled tire according to the present invention. Here, FIG. 3 (A) is a structure without a protrusion (530), FIG. 3 (B) is a structure with a protrusion (530) formed, and FIG. 3 (C) is a structure with an upper section (520) tilted.

[0041] As illustrated in FIG. 3, the fixed structure (500) is composed of a disc-shaped bottom end (510) and a rod-shaped top end (520) installed on the bottom end (510). Also, as shown in FIG. 3 (B), the fixed structure (500) may be provided with a projection (530) for firmly gripping the sound-absorbing material (600).

[0042] Here, the protrusion (530) may be formed in a wing-shaped form such that the longitudinal cross-section in the length direction of the upper section (520) is trapezoidal and the cross-section perpendicular to the length direction of the upper section (520) is circular.

[0043] FIG. 4 is a perspective view of an embodiment in which a sound-absorbing material is combined with a fixing structure of an air-filled tire according to the present invention.

[0044] In the embodiment of FIG. 4, the upper end (520) is inserted into the through hole (610) of the sound-absorbing material (600) and fastened, and a cap (540) is installed at the end of the upper end (520) to further strengthen the fastening of the sound-absorbing material (600). If necessary, an adhesive or the like can be applied to the upper end (520) to achieve a more robust fastening.

[0045] In the embodiment of FIG. 4, a fastening projection is formed on the cap (540) and inserted into the through hole of the upper section (520) to be fastened, but the method of fastening the cap (540) and the upper section (520) is not limited thereto.

[0046] FIG. 5 is a perspective view of another embodiment in which a sound-absorbing material is coupled to a fixing structure of an air-filled tire according to the present invention, and FIG. 6 is a perspective view of yet another embodiment in which a sound-absorbing material is coupled to a fixing structure of an air-filled tire according to the present invention.

[0047] Specifically, FIG. 5 is an example of the structure (A) of FIG. 3 described above, and FIG. 6 is an example of the structure (B) of FIG. 3 described above.

[0048] As shown in FIG. 5, the rod-shaped upper end (520) can be directly inserted into the through hole (610) of the sound-absorbing material (600) and joined. At this time, an adhesive layer can be formed between the inner surface of the through hole (610) and the surface of the upper end (520) for fixation.

[0049] As shown in FIG. 6, a groove with a shape corresponding to a protrusion (530) is formed inside the through hole (610) of the sound-absorbing material (600), and when the upper end (520) is inserted into the through hole (610) of the sound-absorbing material (600), the protrusion (530) is fitted into the groove of the through hole (610), thereby allowing the sound-absorbing material (600) and the fixing structure (500) to be firmly connected.

[0051] Example 1

[0052] Example 1 relates to an example of installing a fixing structure on the longitudinal section of a tire.

[0053] FIG. 7 is a cross-sectional view showing the first and second embodiments of the installation location of the fixing structure of the air-filled tire of the present invention. FIG. 7 (A) illustrates a first embodiment in which one set of two fixing structures (500) is installed on the inner surface corresponding to the tire tread portion (100).

[0054] In this way, the fixed structures (500) are installed in multiple numbers on the inner surface corresponding to the tire tread portion (100), and the multiple fixed structures (500) can form a set. According to the above embodiment, there is an advantage that a sound-absorbing material of sufficient thickness can be installed on the tread portion side.

[0055] FIG. 7 (B) illustrates a second embodiment in which one of the fixing structures (500) is installed on each inner surface corresponding to the bead portion (300) on both sides of the tire to form one set. According to this configuration, sound-absorbing material is installed on the high-rigidity bead portion that grips the wheel, thereby enabling high durability and reducing resonance noise from the wheel.

[0056] FIG. 8 is a cross-sectional view showing the third and fourth embodiments of the installation location of the fixing structure of the air-filled tire according to the present invention. FIG. 8 (A) illustrates a third embodiment in which one fixing structure (500) is installed on each inner surface corresponding to the sidewall portion (200) of the tire to form one set. This configuration has the advantage of effectively reducing resonance noise generated from the bending of the sidewall.

[0057] FIG. 8 (B) illustrates a fourth embodiment in which one of the fixing structures (500) is installed on the inner surface corresponding to the shoulder portion (210) of the tire to form one set. The shoulder portion (210) is the boundary point between the tread portion (100) and the sidewall portion (200), and is a part where a lot of deformation and bending occurs during driving. The above installation location can efficiently reduce resonance noise in the tread portion and the sidewall portion.

[0059] Example 2

[0060] Example 2 relates to an example of installing a fixed structure on the cross-section of a tire.

[0061] FIG. 9 is a cross-sectional view illustrating a first and second embodiment of the installation of sound-absorbing material. FIG. 9 (A) illustrates a first embodiment in which two or more sets of the fixed structure (500) are installed at equal intervals in a radial direction inside the tire, and an annular sound-absorbing material (600) is connected to the sets of the fixed structure (500) and continuously installed in a circumferential direction within the tire interior space.

[0062] The above embodiment provides a configuration suitable for cases where the entire interior of the tire must be filled with sound-absorbing material (600).

[0063] FIG. 9 (B) illustrates a second embodiment in which two or more sets of fixed structures (500) are installed at equal intervals in a radial direction inside a tire, and sound-absorbing materials (600) corresponding to each fixed structure (500) are fastened to each fixed structure (500). In the above embodiment, the size of the sound-absorbing material (600) can be easily adjusted, and the occurrence of residual vibration caused by the movement of the sound-absorbing material can be minimized.

[0064] FIG. 10 is a cross-sectional view illustrating the third and fourth embodiments of the installation of sound-absorbing material. FIG. 10 (A) illustrates a third embodiment in which two or more sets of the fixed structure (500) are installed at equal intervals in a radial direction inside the tire, and rod-shaped sound-absorbing material (600) is installed intermittently in a circumferential direction within the tire interior space by being fastened to some of the sets of the fixed structure (500). In the above embodiment, the weight of the sound-absorbing material (600) is reduced compared to Example 1.

[0065] FIG. 10 (B) illustrates a fourth embodiment in which four sets of fixed structures (500) are installed radially inside a tire at equal intervals, the sound-absorbing material (600) is formed in a rod shape, and both ends of the sound-absorbing material (600) are connected in the longitudinal direction to the upper ends (520) of two fixed structures (500), and the upper ends (520) of the fixed structures (500) are formed to have an inclination of 0 to 90 degrees with respect to the bottom end (510) of the fixed structures (500) in order to adjust the installation angle of the sound-absorbing material (600).

[0066] At this time, the angle of the upper section (520) of the fixed structure (600) is determined by the installation angle of the sound-absorbing material (600). The above configuration has the advantage of being able to install a small amount of sound-absorbing material over a wide area.

[0068] An air-filled tire having an inner mounting structure of an embodiment of the present invention with the above-described configuration can be applied to various vehicles, such as racing cars, electric vehicles, and general vehicles.

[0070] Although the technical concept of the present invention described above has been specifically described in preferred embodiments, it should be noted that such embodiments are for illustrative purposes only and are not intended to be limiting. Furthermore, those skilled in the art will understand that various embodiments are possible within the scope of the technical concept of the present invention. Accordingly, the true scope of technical protection of the present invention should be determined by the technical concept of the appended claims. Explanation of the symbols

[0072] 100: Tread 200: Shoulder area 210: Sidewall 300: Bead part 400: Inner liner layer 500: Fixed structure 510: Hem 520: Upper section 530: Protrusion 540: Cap 600: Sound-absorbing material 610: Communion

Claims

Claim 1 An air-filled tire comprising a tread portion (100), a sidewall portion (200), and a bead portion (300), wherein an inner liner layer (400) is installed inside the tire, and one or more rod-shaped fixing structures (500) for fixing a sound-absorbing material (600) are installed on the inner liner layer (400), and the sound-absorbing material (600) is coupled to and fixedly installed on the rod-shaped fixing structures (500). Claim 2 An air-filled tire according to claim 1, wherein the fixed structure (500) is composed of a bottom end (510) and a rod-shaped top end (520) installed on the bottom end (510). Claim 3 In paragraph 2, a socket (410) having a space for receiving the bottom end (510) is installed on the surface of the inner liner layer (400), and the bottom end (510) of the fixing structure (500) is inserted into the socket (410), thereby fixing the fixing structure (500) inside the tire, characterized in that the air-filled tire is fixedly installed inside the tire. Claim 4 In paragraph 3, the air-filled tire is characterized in that the fixed structure (500) has a projection (530) for firmly gripping the sound-absorbing material (600) or a cap (540) coupled to the end of the rod structure of the fixed structure (500). Claim 5 In paragraph 4, the air-filled tire is characterized in that the fixed structure (500) is installed in multiple numbers on the inner surface corresponding to the tire tread portion (100). Claim 6 An air-filled tire according to claim 4, characterized in that one fixing structure (500) is installed on each inner surface corresponding to the bead portion (300) on both sides of the tire to form one set. Claim 7 An air-filled tire according to claim 4, characterized in that one fixing structure (500) is installed on each inner surface corresponding to the sidewall portion (200) of the tire to form one set. Claim 8 An air-filled tire according to claim 4, characterized in that one fixing structure (500) is installed on each corresponding inner surface corresponding to the shoulder portion (210) of the tire to form one set. Claim 9 An air-filled tire characterized in that, in any one of claims 5 to 8, the fixed structure (500) is installed in radially at equal intervals with two or more sets, and an annular sound-absorbing material (600) is connected to the sets of the fixed structure (500) and continuously installed in a circumferential direction within the tire's internal space. Claim 10 In any one of claims 5 to 8, the air-filled tire is characterized in that two or more sets of the fixed structure (500) are installed at equal intervals in a radial direction inside the tire, and a rod-shaped sound-absorbing material (600) is fastened to some of the sets of the fixed structure (500) and is intermittently installed in a circumferential direction within the internal space of the tire. Claim 11 In any one of claims 5 to 8, the air-filled tire is characterized in that two or more sets of fixed structures (500) are installed at equal intervals in a radial direction inside the tire, and sound-absorbing materials (600) corresponding to each fixed structure (500) are fastened and installed to each fixed structure (500). Claim 12 An air-filled tire characterized in that, in any one of claims 5 to 8, the fixed structure (500) is installed in four sets at equal intervals in a radial direction inside the tire, the sound-absorbing material (600) is formed in a rod shape, the two ends of the sound-absorbing material (600) are each connected in the longitudinal direction to the upper ends (520) of the two fixed structures (500), and the upper ends (520) of the fixed structure (500) are formed to have an inclination of 0 to 90 degrees with respect to the bottom end (510) of the fixed structure (500) in order to adjust the installation angle of the sound-absorbing material (600).

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