Non-pneumatic tire

Abstract

The present invention relates to a non-pneumatic tire and, more specifically, comprises: a tread part to come into contact with the ground; a rim part disposed radially inward from the tread part of the tire; a band part having an inner band provided on the outer circumferential surface of the rim part, and an outer band provided on the inner circumferential surface of the tread part; and a plurality of spoke parts for connecting the inner band and the outer band, wherein the spoke parts include a first side spoke and a second side spoke, which are provided on two side surfaces of the band part and extend in the circumferential direction of the tire such that the wide surfaces thereof face the side surfaces of the tire, thereby reducing aerodynamic effects during traveling, ensuring resistance to external impact, and reducing noise generation.

Description

non-pneumatic tires

[0001] The present invention relates to a non-pneumatic tire, and more specifically, to a non-pneumatic tire for improving the aerodynamic effect generated during driving, ensuring resistance to external impacts, and reducing noise generation.

[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] Tires, which play a crucial role in the driving and braking of such vehicles, were equipped with internal air pressure to perform their function. However, when a tire is damaged due to punctures or impacts caused by external substances, the internal air pressure cannot be maintained, leading to difficulties in driving and consequently, a problem arising in that the tire fails to perform its function.

[0005] On the other hand, unlike pneumatic tires, non-pneumatic tires are constructed with a new concept of process and structure that allows for significant reductions in production costs through the simplification of materials and processes, as well as substantial reductions in energy consumption and the generation of harmful substances. This offers the significant advantage of avoiding problems that can be caused by insufficient air pressure. Furthermore, they have the advantage of preventing the standing wave phenomenon that occurs in pneumatic tires and significantly improving rolling resistance. Accordingly, the technological development of such non-pneumatic tires has been actively pursued recently.

[0006] However, most conventionally disclosed non-pneumatic tires are designed with open sides, similar to carriage wheels. This design has the problem of reduced resistance to external impacts and poor aerodynamic performance during driving.

[0007] To improve this, many companies have attempted to improve it by applying plates that block the side sections, but in areas with a lot of deformation such as curbs or speed bumps, such plates are actually damaged, causing a counterproductive effect, so an alternative is needed.

[0008] <Prior Art> Korean Registered Patent No. 10-2415200

[0009]

[0010] The objective of the present invention, which aims to solve the above-mentioned problems, is to provide a non-pneumatic tire that improves the aerodynamic effect generated during driving, secures resistance to external impacts, and reduces noise generation.

[0011] 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.

[0012]

[0013] The configuration of the airless tire according to the present invention for achieving the above-mentioned purpose comprises: a tread portion arranged to be in contact with the ground; a rim portion arranged radially inward from the tread portion; a band portion having an inner band arranged on the outer circumference of the rim portion and an outer band arranged on the inner circumference of the tread portion; and a plurality of spoke portions arranged to connect the inner band and the outer band, wherein the spoke portions are characterized by having a first side spoke and a second side spoke arranged on both sides of the band portion and extending in the circumferential direction of the tire such that the wider surface faces the side of the tire.

[0014] In an embodiment of the present invention, the spoke portion may further include one or more intermediate spokes provided between the first side spoke and the second side spoke.

[0015] In an embodiment of the present invention, the first side spoke and the second side spoke may be provided such that their stiffness is different from that of the intermediate spoke.

[0016] In an embodiment of the present invention, the intermediate spoke may include a first intermediate spoke adjacent to the first side spoke; and a second intermediate spoke adjacent to the second side spoke.

[0017] In an embodiment of the present invention, the first intermediate spoke is arranged to be symmetrical with respect to the first side spoke along the y-axis, and the second intermediate spoke may be arranged to be symmetrical with respect to the second side spoke along the y-axis.

[0018] In an embodiment of the present invention, the first side spoke may include: a first body having one end connected to the outer band and the other end extending diagonally in one direction toward the inner side of the tire; a second body having one end connected to the other end of the first body and the other end extending diagonally in another direction toward the inner side of the tire; a third body having one end connected to the other end of the second body and the other end extending diagonally in one direction toward the inner side of the tire; and a fourth body having one end connected to the other end of the third body and the other end extending diagonally in another direction toward the inner side of the tire and connected to the inner band.

[0019] In an embodiment of the present invention, the first side spoke may be formed such that the first body, the second body, the third body, and the fourth body are extended by a predetermined length in the circumferential direction of the tire, so that the wide surface faces the side direction of the tire.

[0020] In an embodiment of the present invention, the spoke portion may be provided such that the surface in contact with the band portion is located inward from the width of the tread portion.

[0021] In an embodiment of the present invention, the spoke portion may be arranged in a plurality along the circumferential direction of the tire.

[0022] In an embodiment of the present invention, a sound-absorbing portion may be included that is provided inside the spoke portion and extends in the circumferential direction of the tire.

[0023] In an embodiment of the present invention, the sound-absorbing member may be made of TPA (thermoplastic polyamide elastomer) material.

[0024] In an embodiment of the present invention, the sound-absorbing part may have a hardness (HS) of 52 to 55 and an elongation of 800 to 850%.

[0025] In an embodiment of the present invention, the sound-absorbing part may be manufactured by 3D printing.

[0026] In an embodiment of the present invention, the sound-absorbing member may be made of a porous material.

[0027] In another embodiment of the present invention, a method for manufacturing a non-pneumatic tire is provided, comprising: a step of marking a position to which each spoke is to be attached on a vulcanized plate; a step of manufacturing each of the spokes; and a step of attaching the manufactured spoke to a position marked in advance on the vulcanized plate to form the spoke portion.

[0028] In an embodiment of the present invention, in the step of indicating the location where each spoke is to be attached to the vulcanized plate, a groove extending in the tire width direction may be formed in the vulcanized plate at the location where the spoke is to be attached.

[0029] In an embodiment of the present invention, the step of forming the spoke portion by attaching the manufactured spoke to a pre-marked position on the vulcanized plate may include: a step of sanding the attachment position on the vulcanized plate where the spoke is to be attached; and a step of attaching the spoke to the attachment position by means of an adhesive.

[0030] In an embodiment of the present invention, the step of forming the spoke portion by attaching the manufactured spoke to a pre-marked position on the vulcanized plate may include: a step of sanding the attachment position on the vulcanized plate where the spoke is to be attached; a step of applying cement to the attachment position and then attaching cushion gum; and a step of applying heat and pressure by a mold to chemically bond the spoke to the attachment position.

[0031]

[0032] The effect of the present invention according to the above configuration is that there is no problem of foreign matter getting stuck between the spokes and causing damage, and even if the side spokes are partially damaged, the middle spoke supports the inner side, so it has excellent resistance to external impact and the aerodynamic effect is improved during driving.

[0033] In addition, according to the present invention, the weight of the spokes can be reduced compared to conventional non-pneumatic tires.

[0034] In addition, according to the present invention, characters can be engraved on the side spokes of the spoke portion, or a transfer sheet can be attached.

[0035] 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.

[0036]

[0037] FIG. 1 is a perspective view of a non-pneumatic tire according to an embodiment of the present invention.

[0038] FIG. 2 is a perspective view showing a tread portion and a spoke portion according to an embodiment of the present invention.

[0039] FIG. 3 is a perspective view of a tread portion and a modular spoke portion according to an embodiment of the present invention.

[0040] FIG. 4 is a photograph of a tread section and a modular spoke section according to an embodiment of the present invention.

[0041] FIG. 5 is a photograph of a state in which a modular spoke part according to an embodiment of the present invention is attached.

[0042] FIG. 6 is an example diagram showing a sound-absorbing part inserted into a spoke part according to an embodiment of the present invention.

[0043] FIG. 7 is an example diagram of the installation of a modular spoke section according to an additional embodiment of the present invention.

[0044] Figure 8 shows the stress analysis results according to the applied load.

[0045] Figure 9 shows the result of 3D printing modeling.

[0046] FIG. 10 is a flowchart of a method for manufacturing a modular spoke part according to an embodiment of the present invention.

[0047] FIG. 11 is a flowchart of the step in which a spoke produced according to an embodiment of the present invention is attached to a pre-marked position on a vulcanized plate to form a spoke portion.

[0048] FIG. 12 is a flowchart of the step in which a spoke is formed by attaching a manufactured spoke to a pre-marked position on a vulcanized plate according to another embodiment of the present invention.

[0049]

[0050] The pneumatic tire of the present invention comprises: a tread portion arranged to be in contact with the ground; a rim portion arranged radially inward from the tread portion; a band portion having an inner band arranged on the outer circumference of the rim portion and an outer band arranged on the inner circumference of the tread portion; and a plurality of spoke portions arranged to connect the inner band and the outer band, wherein the spoke portions are characterized by having a first side spoke and a second side spoke arranged on both sides of the band portion and extending in the circumferential direction of the tire such that the wider surface faces the side of the tire.

[0051]

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057]

[0058] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0059] FIG. 1 is a perspective view of a non-pneumatic tire according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a tread portion and a spoke portion according to an embodiment of the present invention.

[0060] FIG. 3 is a perspective view of a tread portion and a modular spoke portion according to an embodiment of the present invention, and FIG. 4 is a photograph of a tread portion and a modular spoke portion according to an embodiment of the present invention.

[0061] FIG. 5 is a photograph of a modular spoke section attached according to an embodiment of the present invention, and FIG. 6 is an example diagram of a sound-absorbing section inserted into a spoke section according to an embodiment of the present invention.

[0062] Referring to FIGS. 1 to 6, the non-pneumatic tire (1000) according to the present invention may include a tread portion (1100), a band portion (1200), a spoke portion (1300), a rim portion (1400), and a sound-absorbing portion (1500).

[0063] The tread portion (1100) is located at the outermost part of the non-pneumatic tire (1000) and can be arranged to come into contact with the ground.

[0064] The above tread section (1100) may include a center block (1110) and a shoulder block (1120).

[0065] Specifically, the tread portion (1100) is provided with a plurality of grooves along the circumferential direction of the non-pneumatic tire (1000), and the center block (1110) and the shoulder block (1120) may be separated by the grooves. The number of center blocks (1110) may be one or more.

[0066] The center block (1110) is positioned between the shoulder blocks (1120), and in one embodiment, for convenience of explanation, it is illustrated and described as two.

[0067] The above shoulder blocks (1120) may be provided as a pair, positioned on both sides in the width direction of the above air-filled tire (1000).

[0068] The rim portion (1400) may be provided on the radial inner side of the non-pneumatic tire from the tread portion (1100).

[0069] The band portion (1200) may be provided between the rim portion (1400) and the tread portion (1100) and may include an inner band (1210) and an outer band (1220).

[0070] The inner band (1210) may be provided on the outer surface of the rim portion (1400).

[0071] The above outer band (1220) can be provided on the inner surface of the tread portion (1100).

[0072] In addition, a guide groove may be formed on the outer side of the mold forming the inner band (1210) and the outer band (1220) in the tire width direction to guide a protrusion that guides the position where the spoke portion (1300) can be attached.

[0073] As a result, a protruding guide portion may be further formed on the inner band (1210) and the outer band (1220) so that the spoke portion (1300) can be attached.

[0074] The spoke portion (1300) may be provided to connect the inner band (1210) and the outer band (1220).

[0075] The above spoke portion (1300) may be provided to include a plurality of spokes, and may be provided to have two or more spokes including a first side spoke (1310) and a second side spoke (1320).

[0076] Specifically, the first side spoke (1310) and the second side spoke (1320) are provided on both sides of the band portion (1200) and can be provided extending in the circumferential direction of the tire so that the wider side faces the side of the tire.

[0077] The first side spoke (1310) and the second side spoke (1320) may be arranged to be located at the lower part of a pair of shoulder blocks (1120), respectively.

[0078] According to one embodiment, the first side spoke (1310) may include a first body (1311), a second body (1312), a third body (1313), and a fourth body (1314).

[0079] The first body (1311) may be configured such that one end is connected to the outer band (1220) and the other end extends diagonally in one direction toward the inside of the tire.

[0080] The second body (1312) may be configured such that one end is connected to the other end of the first body (1311), and the other end extends diagonally toward the inner side of the tire.

[0081] One end of the third body (1313) is connected to the other end of the second body (1312), and the other end may extend diagonally in one direction toward the inside of the tire.

[0082] One end of the fourth body (1314) is connected to the other end of the third body (1313), and the other end is extended diagonally toward the inner side of the tire and can be connected to the inner band (1210).

[0083] In addition, the first body (1311), the second body (1312), the third body (1313), and the fourth body (1314) may be formed to extend a predetermined length in the circumferential direction of the tire, so that the wider side faces the side direction of the tire. As a result, when viewing the non-pneumatic tire (1000) from the side, the gap may be almost invisible.

[0084] In particular, the first connecting portion where the first body (1311) and the second body (1312) are connected and inflected, the second connecting portion where the second body (1312) and the third body (1313) are connected and inflected, and the third connecting portion where the third body (1313) and the fourth body (1314) are connected and inflected can each be formed to be thicker than the first body (1311), the second body (1312), the third body (1313), and the fourth body (1314).

[0085] In addition, the first connecting part, the second connecting part, and the third connecting part may each be formed such that the curvature of the protruding surface is greater than the curvature of the opposite surface.

[0086] The shape of the first side spoke (1310) is not limited to one embodiment.

[0087] The second side spoke (1320) is located on the opposite side of the first side spoke (1310) and has a shape corresponding to the first side spoke (1310), but can be provided in a y-axis symmetrical form.

[0088] The first side spoke (1310) and the second side spoke (1320) may be arranged so that the surface in contact with the band portion (1200) is located inward from the width of the tread portion (1100), thereby ensuring stable attachment.

[0089] And, the spoke portion (1300) may be configured to further include one or more intermediate spokes provided between the first side spoke (1310) and the second side spoke (1320).

[0090] In one embodiment, it is described that there are a total of two intermediate spokes, including a first intermediate spoke (1330) and a second intermediate spoke (1340), but the number of intermediate spokes is not limited thereto.

[0091] The first intermediate spoke (1330) is provided at the bottom of the center block (1110) and may be provided adjacent to the first side spoke (1310). The first intermediate spoke (1330) may be formed to have a shape corresponding to the first side spoke (1310) and to be symmetrical along the y-axis.

[0092] The second intermediate spoke (1340) is provided at the bottom of the center block (1110) and may be provided adjacent to the second side spoke (1320). The second intermediate spoke (1340) may be formed to have a shape corresponding to the second side spoke (1310) and to be symmetrical along the y-axis.

[0093] At this time, the first intermediate spoke (1330) and the second intermediate spoke (1340) may be provided with a gap such that their middle portions do not come into contact with each other until 160% of the load of the vehicle being mounted is applied to the tire.

[0094] In addition, it is preferable that the first intermediate spoke (1330) and the second intermediate spoke (1340) are spaced apart so that they do not come into contact with each other even when the tire twists due to cornering.

[0095] Additionally, the first side spoke (1310) and the second side spoke (1320) may be provided with the same or different rigidity as the first intermediate spoke (1330) and the second intermediate spoke (1340).

[0096] In particular, the first intermediate spoke (1330) and the second intermediate spoke (1340) may be provided with greater rigidity than the first side spoke (1310) and the second side spoke (1320). The first intermediate spoke (1330) and the second intermediate spoke (1340) provided in this way can support the space between the tread portion (1100) and the rim portion (1400) and allow for stable driving even if the first side spoke (1310) and the second side spoke (1320) are damaged, such as by tearing.

[0097] Also, each spoke forming the spoke portion (1300) may be provided with a different shape from one another.

[0098] The spoke portion (1300) provided as described above may be provided in a modular form and arranged in multiple numbers along the circumferential direction of the tire.

[0099] Specifically, the spoke portion (1300) having multiple spokes may be provided to be detachably attached at predetermined intervals along the circumferential direction of the non-pneumatic tire (1000).

[0100] The above-mentioned non-pneumatic tire (1000) provided in this manner allows for convenient maintenance by enabling only the relevant spoke portion (1300) to be replaced when damage occurs to a specific spoke portion (1300).

[0101] Additionally, the spoke portion (1300) may be arranged so that its width narrows toward the center of the tire. The spoke portion (1300) arranged in this way may form a circle so that adjacent spoke portions (1300) do not interfere with each other.

[0102]

[0103] FIG. 7 is an example diagram of the installation of a modular spoke section according to an additional embodiment of the present invention.

[0104] Meanwhile, referring further to FIG. 7, the spoke portion (1300) of the above-mentioned airless tire (1000) may be attached such that the wide side faces both sides, and some spoke portions (2300) may be arranged in a direction perpendicular to the previously arranged spoke portion (1300).

[0105] In addition, the spoke portions (1300) attached along the circumferential direction may be arranged to have different rigidities. For example, it is possible to attach spoke portions (1300) having two types of rigidity alternately.

[0106] Meanwhile, among the spoke portions (1300), the first side spoke (1310) and the second side spoke (1320) may be made of non-petroleum and petroleum materials such as urethane and plastic, in addition to rubber, and the first intermediate spoke (1330) and the second intermediate spoke (1340) may be made of carbon fibers and glass fibers, as well as materials extracted from petroleum and materials made from non-petroleum (including plant-based) materials.

[0107] The sound-absorbing part (1500) is provided inside the spoke part (1300) and can be extended in the circumferential direction of the non-pneumatic tire (1000).

[0108] For example, as illustrated in FIG. 6, the sound-absorbing member (1500) may be provided between the first side spoke (1310) and the first intermediate spoke (1330), and between the second side spoke (1320) and the second intermediate spoke (1340).

[0109] The above sound-absorbing part (1500) may be made of a material having a hardness (HS) of 52 to 55 and an elongation of 800 to 850%. For example, the above sound-absorbing part (1500) may be made of a TPA (thermoplastic polyamide elastomer) material that satisfies the above conditions.

[0110] In addition, the sound-absorbing part (1500) may be made of a porous material. That is, the sound-absorbing part (1500) may be provided to maintain a porous form without undergoing separate chemical treatment.

[0111] The sound-absorbing member (1500) provided in this way can reduce noise generated during driving.

[0112] Figure 8 shows the results of stress analysis according to the applied load, and Figure 9 shows the results of 3D printing modeling.

[0113] Referring to FIGS. 8 and 9, the present invention, as described above, can be manufactured by 3D printing modeling, and can be configured so that 3D printing is performed by considering the contact pitch arrangement between spokes according to the stress analysis results according to the load.

[0114] In particular, the tread portion (1100), the band portion (1200), the spoke portion (1300), and the sound-absorbing portion (1500) can be divided into multiple parts so that 3D printing can be performed.

[0115] In this way, when manufactured by a 3D printer, the sound-absorbing part (1500) may be provided to be manufactured together by 3D printing inside the spoke part (1300). That is, the sound-absorbing part (1500) may be provided by being inserted into the inside of the spoke part (1300) provided in a modular form, or it may be provided by being manufactured by 3D printing.

[0116]

[0117] FIG. 10 is a flowchart of a method for manufacturing a non-pneumatic tire and a modular spoke part according to an embodiment of the present invention.

[0118] Referring to FIG. 10, the manufacturing method of the aforementioned modular spoke portion (1300) may include a step (S110) of marking a position to which each spoke is to be attached to a vulcanized plate, a step (S120) of manufacturing each spoke, and a step (S130) of attaching the manufactured spoke to a position marked in advance on the vulcanized plate to form a spoke portion.

[0119] In the step (S110) where the location to which each spoke is to be attached is indicated on the vulcanized plate, the vulcanized plate may be provided with a groove formed extending in the tire width direction at the location to which the spokes are to be attached.

[0120] At this time, the vulcanized plate may be vulcanized to a thickness of 1 mm or less.

[0121] Next, in the step (S120) where each spoke is manufactured, the spoke may be formed according to a preset design and manufactured by vulcanizing at a temperature of 150 to 160 degrees for 30 to 35 minutes, taking into account the shrinkage rate of the material.

[0122] FIG. 11 is a flowchart of the step in which a spoke produced according to an embodiment of the present invention is attached to a pre-marked position on a vulcanized plate to form a spoke portion.

[0123] Referring to FIG. 11, the step (S130) of forming a spoke portion by attaching a manufactured spoke to a pre-marked position on a vulcanized plate may include a step (S131) ​​of sanding the attachment position on the vulcanized plate where the spoke is to be attached, and a step (S132) of attaching the spoke portion to the attachment position by means of an adhesive.

[0124] In the step (S131) ​​where the attachment location to which the spoke is to be attached is sanded among the vulcanized plates, the attachment location to which the spoke is to be attached among the vulcanized plates may be sanded for at least 1 minute.

[0125] Next, in the step (S132) where the spoke is attached to the attachment location by an adhesive, the spoke may be arranged to be attached to the attachment location by an adhesive.

[0126] FIG. 12 is a flowchart of the step in which a spoke is attached at a pre-marked position on a vulcanized plate according to another embodiment of the present invention to form a spoke portion.

[0127] Referring to FIG. 12, the step (S130) of forming a spoke portion by attaching a manufactured spoke to a pre-marked position on a vulcanized plate may include the step of sanding the attachment position on the vulcanized plate where the spoke is to be attached (S231), the step of applying cement to the attachment position and then attaching cushion gum (S232), and the step of chemically bonding the spoke to the attachment position by applying heat and pressure by a mold (S233).

[0128] In the step (S231) where the attachment location to which the spoke is to be attached is sanded among the vulcanized plates, the attachment location to which the spoke is to be attached on the vulcanized plates may be sanded for at least 1 minute.

[0129] Next, in the step (S232) where the cushion gum is attached after applying cement to the attachment location, the cushion gum may be attached after applying cement to the attachment location.

[0130] Next, in the step (S233) where heat and pressure are applied by a mold to chemically bond the spoke to the attachment location, heat and pressure may be applied to the mold to chemically bond the spoke to the attachment location.

[0131] The spoke portion (1300) produced in this way can be attached to the band portion (1200) or directly attached to the rim portion (1400), etc. after sanding the upper and lower surfaces.

[0132] As described above, the present invention does not have the problem of foreign matter getting stuck between the spokes and causing damage, and even if the side spokes are partially damaged, the middle spoke supports the inner side, so it has excellent resistance to external impact and improves aerodynamic effects during driving.

[0133] In addition, according to the present invention, the weight of the spokes can be reduced to about 2 / 3 compared to conventional non-pneumatic tires.

[0134] In addition, according to the present invention, characters may be engraved on the side spokes of the spoke portion, or a transfer sheet may be attached to achieve advertising effects.

[0135] 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.

[0136] 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.

[0137]

[0138] <Explanation of Symbols>

[0139] 1000: Non-pneumatic tire

[0140] 1100: Tread

[0141] 1110: Center Block

[0142] 1120: Shoulder Block

[0143] 1200: Band Club

[0144] 1210: Medial band

[0145] 1220: Outer band

[0146] 1300: Spoke section

[0147] 1310: 1st side spoke

[0148] 1311: First body

[0149] 1312: Second body

[0150] 1313: Third body

[0151] 1314: Fourth body

[0152] 1320: 2nd side spoke

[0153] 1330: 1st middle spoke

[0154] 1340: 2nd middle spoke

[0155] 1400: Limbu

[0156] 1500: Sound-absorbing part

[0157] 2300: Spoke section

Claims

1. A tread portion provided to contact the ground; A rim portion provided on the radially inner side of the tire from the tread portion above; A band portion having an inner band provided on the outer surface of the rim portion and an outer band provided on the inner surface of the tread portion; and It includes a plurality of spoke portions arranged to connect the inner band and the outer band, The above spoke portion is, A non-pneumatic tire characterized by having a first side spoke and a second side spoke provided on both sides of the above-mentioned band portion and extended in the circumferential direction of the tire such that the wider surface faces the side of the tire.

2. In Paragraph 1, The above spoke portion is, A non-pneumatic tire characterized by further including one or more intermediate spokes provided between the first side spoke and the second side spoke.

3. In Paragraph 2, A non-pneumatic tire characterized in that the first side spoke and the second side spoke are provided to have different rigidity from the intermediate spoke.

4. In Paragraph 2, The above intermediate spoke is, A first intermediate spoke adjacent to the first side spoke; and A non-pneumatic tire characterized by including a second intermediate spoke adjacent to the second side spoke.

5. In Paragraph 4, The first intermediate spoke is arranged to be y-axis symmetric with respect to the first side spoke, and A non-pneumatic tire characterized in that the second intermediate spoke is arranged to be y-axis symmetric with respect to the second side spoke.

6. In Paragraph 1, The above-mentioned first side spoke is, A first body having one end connected to the outer band and the other end extending diagonally in one direction toward the inside of the tire; A second body having one end connected to the other end of the first body and the other end extending diagonally in the inner direction of the tire; A third body having one end connected to the other end of the second body and the other end extending diagonally in one direction toward the inside of the tire; and A non-pneumatic tire characterized by including a fourth body, wherein one end is connected to the other end of the third body, and the other end extends diagonally in the inner direction of the tire and is connected to the inner band.

7. In Paragraph 6, The above-mentioned first side spoke is, A non-pneumatic tire characterized in that the first body, the second body, the third body, and the fourth body are formed to extend by a predetermined length in the circumferential direction of the tire, so that the wide surface faces the side direction of the tire.

8. In Paragraph 1, The above spoke portion is, A non-pneumatic tire characterized in that the surface in contact with the band portion is positioned inwardly from the width of the tread portion.

9. In Paragraph 1, A non-pneumatic tire characterized in that the spoke portions are arranged in a plurality along the circumferential direction of the tire.

10. In Paragraph 1, A non-pneumatic tire characterized by including a sound-absorbing portion provided inside the spoke portion and extending in the circumferential direction of the tire.

11. In Paragraph 10, The above sound-absorbing part is characterized by being made of a porous material.

12. In the method for manufacturing a non-pneumatic tire according to claim 1, A step of marking the location where each spoke is to be attached to the vulcanized plate; A step in which each of the above spokes is manufactured; and A method for manufacturing a non-pneumatic tire, characterized by including the step of attaching the manufactured spoke to a pre-marked position on the vulcanized plate to form the spoke portion.

13. In Paragraph 12, In the step where the location to be attached to each spoke is marked on the vulcanized plate, A method for manufacturing a non-pneumatic tire, characterized in that the above-described vulcanized plate is provided with a groove formed extending in the tire width direction at a location where the above-described spoke is to be attached.

14. In Paragraph 12, The step of forming the spoke portion by attaching the above-manufactured spoke to a pre-marked position on the vulcanized plate is as follows: A step of sanding the attachment location on the vulcanized plate where the spoke is to be attached; and A method for manufacturing a non-pneumatic tire characterized by including the step of attaching the spoke to the attachment position by an adhesive.

15. In Paragraph 12, The step of forming the spoke portion by attaching the above-manufactured spoke to a pre-marked position on the vulcanized plate is as follows: A step of sanding the attachment location on the vulcanized plate where the spoke is to be attached; A step of attaching cushion gum after applying cement to the above attachment location; and A method for manufacturing a non-pneumatic tire characterized by including the step of applying heat and pressure by a mold to chemically bond the spoke to the attachment position.

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