JP6173903B2 - Non pneumatic tire - Google Patents

Description

  The present invention relates to a non-pneumatic tire that does not need to be filled with pressurized air when used.

  Conventional non-pneumatic tires include solid rubber tires such as solid tires and cushion tires. Such a tire having a solid rubber structure has a large mass and lacks shock absorption, so that it is actually not used in a tire for passenger cars where ride comfort performance is important. Therefore, in order to improve the performance of the non-pneumatic tire, a non-pneumatic tire having a structure in which the inner annular portion and the outer annular portion provided concentrically are connected by spokes has been proposed.

  For example, Patent Document 1 proposes a structure in which a support wall that connects the inner annular portion and the outer annular portion is provided with a support wall that intersects the tire equatorial plane multiple times on the circumference while continuing in the tire circumferential direction. Has been. Patent Document 2 discloses a configuration in which an inner annular portion and an outer annular portion are connected by a plurality of spokes arranged at intervals in the tire circumferential direction, and the spokes are inclined with respect to the tire axial direction. Has been. In Patent Document 3, after providing an intermediate annular portion between the inner annular portion and the outer annular portion, between the inner annular portion and the intermediate annular portion, and between the intermediate annular portion and the outer annular portion, respectively. A structure is disclosed in which a plurality of spokes extending in the tire axial direction are disposed at intervals in the tire circumferential direction.

  In these non-pneumatic tires, when a load is applied, the inner ring portion and the outer ring portion are deformed in a direction in which the distance between them approaches, and a compression force acts on the spokes. Can be absorbed. However, in a structure in which a plurality of spokes extending in the tire axial direction are arranged at intervals in the tire circumferential direction, there is a possibility that adjacent spokes may contact each other by bending in a direction approaching each other, and durability may be impaired. There is. In particular, when the spoke is formed of a polymer material such as a resin or an elastomer for the purpose of weight reduction or the like, there is a problem that it is difficult to exhibit excellent durability.

  By the way, Patent Document 4 discloses a structure in which an annular structure and an inner annular structure are connected by a plurality of metal spring members as an in-wheel motor type tire / wheel assembly for an electric vehicle. Yes. In addition, as an example of the arrangement of the metal spring members, a structure in which metal spring members having a circular arc cross section are arranged so that the convex portions of the arcs face outward in the tire axial direction is disclosed. However, this document requires that the connecting portion be made of a metal spring member for the purpose of effectively radiating the heat of the motor into the air, and avoids contact between the spokes. There is no disclosure about the effect of improving durability.

Japanese Patent Laid-Open No. 3-82601 JP 2013-139253 A JP 2009-035050 A JP 2012-187882 A

  This invention is made | formed in view of the above point, and it aims at providing the non-pneumatic tire which can improve durability.

The non-pneumatic tire according to the present embodiment includes an inner annular portion, an outer annular portion surrounding the outer periphery of the inner annular portion, a connecting portion connecting the inner annular portion and the outer annular portion, and an outer periphery of the outer annular portion. In the non-pneumatic tire provided with a tread portion provided on the tire, the connecting portion includes a circumferential support wall provided at both ends in the tire axial direction and extending in the tire circumferential direction and made of resin or elastomer, The circumferential support walls at both ends are each formed in a convex shape outward in the tire axial direction.
In the non-pneumatic tire according to claim 1, the circumferential support wall is composed of a plate-like wall portion having a curved or bent cross-sectional shape that swells outward in the tire axial direction. It is provided continuously over the entire circumference.
In the pneumatic tire according to claim 2, the circumferential support walls disposed at both ends in the tire axial direction are connected by an elastic member that regulates a distance between the circumferential support walls.

  According to the present embodiment, the circumferential support wall provided as the connecting portion that connects the inner annular portion and the outer annular portion has a convex shape toward the outer side in the tire axial direction. Will bend and deform outward in the tire axial direction. That is, since the circumferential support walls provided at both ends bend in a direction away from each other, the support walls are not in contact with each other, and durability can be improved.

The side view of the non-pneumatic tire concerning a 1st embodiment. Sectional drawing in the rim assembly state in the position corresponded to the II-II line | wire of FIG. Sectional drawing of the non-pneumatic tire which concerns on 2nd Embodiment. The front view of the inner side annular part which shows the arrangement | positioning relationship between the circumferential direction support wall and axial direction spoke in 2nd Embodiment. The fragmentary perspective view of the support structure in 2nd Embodiment. Sectional drawing of the non-pneumatic tire which concerns on 3rd Embodiment. The front view of the inner side annular part which shows the arrangement | positioning relationship between the circumferential direction support wall and axial direction spoke in 3rd Embodiment. Sectional drawing of the non-pneumatic tire which concerns on 4th Embodiment. The front view of the inner side annular part which shows the arrangement | positioning relationship between the circumferential direction support wall and axial direction spoke in 4th Embodiment. Sectional drawing of the non-pneumatic tire which shows the example of a change of 4th Embodiment. The side view of the non-pneumatic tire concerning a 5th embodiment. XII-XII sectional view taken on the line of FIG.

  Hereinafter, the non-pneumatic tire according to the embodiment will be described with reference to the drawings.

  1 and 2 show a non-pneumatic tire 10 according to the first embodiment. The non-pneumatic tire 10 includes an inner annular portion 12, an outer annular portion 14 that surrounds the outer periphery of the inner annular portion 12, a connecting portion 16 that connects the inner annular portion 12 and the outer annular portion 14, and an outer periphery of the outer annular portion 14. And a tread portion 18 provided on the head.

  As shown in FIG. 2, the inner annular portion 12 is a portion that is attached to the rim 2 of the wheel 1, and has a cylindrical shape that is externally fitted to the rim 2. The outer annular portion 14 has a cylindrical shape surrounding the inner annular portion 12 coaxially (that is, concentrically) with a gap therebetween, and the inner annular portion 12 and the inner annular portion 12 so as to surround the entire width. The same width is set in the tire axial direction A. The connecting part 16 is a part that supports the outer annular part 14 with respect to the inner annular part 12, and is interposed between the inner annular part 12 and the outer annular part 14 to couple them together. In the non-pneumatic tire 10, the inner annular portion 12, the outer annular portion 14, and the connecting portion 16 constitute a support structure 20 that supports a load from the vehicle.

  In the present embodiment, the support structure 20 is made of resin or elastomer. These resins or elastomers may be reinforced with reinforcing materials such as fibers.

  Examples of the resin include a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin include polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, polyamide resin, polyester resin, polycarbonate resin, acrylonitrile butadiene styrene resin (ABS resin), acrylonitrile styrene resin (AS resin), and the like. Any one of these or a combination of two or more can be used. Moreover, as a thermosetting resin, an epoxy resin, a phenol resin, a polyurethane resin, a silicon resin, a polyimide resin, a melamine resin, an unsaturated polyester resin, etc. are mentioned, and these are used alone or in combination of two or more. Can do.

  Examples of the elastomer include a thermoplastic elastomer or a crosslinked rubber. Examples of the thermoplastic elastomer include polyester elastomers, polyolefin elastomers, polyamide elastomers, polystyrene elastomers, polyvinyl chloride elastomers, polyurethane elastomers, and the like, and any one or a combination of these can be used. As rubber components constituting the crosslinked rubber, natural rubber, styrene butadiene rubber (SBR), butadiene rubber (BR), isoprene rubber (IIR), nitrile rubber (NBR), hydrogenated nitrile rubber (hydrogenated NBR), Synthetic rubbers such as chloroprene rubber (CR), ethylene propylene rubber (EPDM), fluorine rubber, silicon rubber, acrylic rubber, urethane rubber and the like can be mentioned, and any one of these or a combination of two or more can be used. As a crosslinking agent for crosslinking these rubber components, for example, sulfur, sulfur compounds, metal oxides, modified phenol resins, and the like can be used depending on the type of rubber component.

  Examples of the reinforcing material that reinforces these resins or elastomers include reinforcing fibers such as long fibers, short fibers, woven fabrics, and nonwoven fabrics, and granular fillers. Examples of the reinforcing fibers include rayon cords, polyamide cords such as nylon-6,6, polyester cords such as polyethylene terephthalate, aramid cords, glass fiber cords, carbon fibers, steel cords, and the like. Examples of the particulate filler include ceramics such as carbon black, silica, and alumina, and other inorganic fillers.

  The tread portion 18 provided on the outer periphery of the support structure 20 is a portion serving as a tread surface portion of the non-pneumatic tire 10 and is formed of a rubber elastic body provided on the outer peripheral surface of the outer annular portion 14. As the tread portion 18, the same tread rubber as that of a conventional pneumatic tire can be used, and although not shown, a tread pattern similar to that of a conventional pneumatic tire is usually provided on the surface. A reinforcing layer such as a belt may or may not be provided between the tread portion 18 and the outer annular portion 14.

  The connecting portion 16 includes circumferential support walls 22 provided at both ends in the tire axial direction A and extending in the tire circumferential direction C. As shown in FIG. 2, the circumferential support wall 22 is formed by connecting the inner annular portion 12 and the outer annular portion 14 to each other at the ends of the inner annular portion 12 and the outer annular portion 14 in the tire axial direction A. It is a wall part which supports the annular part 14 with respect to the inner annular part 12, and is provided in a pair on the left and right so as to face the tire axial direction A. Here, both end portions in the tire axial direction A in which the circumferential support wall 22 is provided are regions on both sides excluding the central portion of the inner annular portion 12, and the central portion is the tire axial direction of the inner annular portion 12. This is a region about 1/3 of the entire width of the inner annular portion 12 with the center position in A as the center of the region.

  The circumferential support wall 22 is a wall portion extending along the tire circumferential direction C. In this example, a plurality of circumferential support walls 22 are provided at intervals in the tire circumferential direction C as shown in FIG. It is provided as a spoke. Specifically, the circumferential support walls 22 are arranged at equal intervals in the tire circumferential direction C. The number of the circumferential support walls 22 in the tire circumferential direction C is not particularly limited, but is preferably 2 to 300 pairs, more preferably 4 to 2 with the circumferential support walls 22 and 22 at both ends as a pair. There are 200 pairs.

  As shown in FIG. 2, the circumferential support walls 22, 22 at both left and right ends are each formed in a convex shape toward the outside in the tire axial direction A. That is, the circumferential support wall 22 is a plate-like wall portion having a curved or bent cross-sectional shape that bulges outward in the tire axial direction A, and the inner peripheral side root portion 24 and the outer side with respect to the inner annular portion 12. A radially central portion 28 is formed so as to be positioned on the outer side in the tire axial direction A with respect to the outer peripheral side root portion 26 with respect to the annular portion 14. Accordingly, the left and right circumferential support walls 22 and 22 are formed in a cross-sectional shape that swells so that the radial center portions 28 and 28 are separated from each other. Here, the symbol R indicates the radial direction (tire radial direction).

  In addition, since the circumferential direction support wall 22 comprises the connection part 16, it consists of above-described resin or an elastomer, and this includes what was reinforced with reinforcement materials, such as a fiber as mentioned above. It is.

  The non-pneumatic tire 10 according to the present embodiment is manufactured by forming the support structure 20 by molding or injection molding and then forming the tread portion 18 on the outer periphery of the support structure 20 by vulcanization molding or the like. can do. The manufacturing method of the support structure 20 having the circumferential support wall 22 as described above is not particularly limited. For example, the inner annular portion 12, the outer annular portion 14, and the circumferential support wall 22 are separately molded. These may be joined and integrated, or alternatively, the support structure 20 may be formed into two parts in the tire axial direction A and both may be joined and integrated. Alternatively, the inner annular portion 12 and the outer annular portion may be joined together. 14 having an inner / outer two-layer structure that can be fitted to each other, an inner layer of the inner annular portion 12, an inner layer of the outer annular portion 14, a part having one circumferential support wall 22, and an outer layer of the inner annular portion 12; The parts having the outer layer of the outer annular portion 14 and the other circumferential support wall 22 may be formed in advance, and both may be fitted and integrated. Alternatively, the inner annular portion 12, the outer annular portion 14, and the circumferential support wall 22 may be integrally formed.

  In the case of the non-pneumatic tire 10 of the present embodiment configured as described above, the left and right circumferential support walls 22 and 22 that connect the end portions of the inner annular portion 12 and the outer annular portion 14 are outward in the tire axial direction A. Supports the load by swelling. At that time, since these circumferential support walls 22 and 22 have a convex shape outward in the tire axial direction A, the outer circumferential support walls 22 and 22 are outward in the tire axial direction A when a compressive force acts upon receiving a load. Deflection and deformation. That is, since the circumferential support walls 22 and 22 provided at both ends bend away from each other, the circumferential support walls 22 and 22 adjacent to each other in the tire axial direction A do not come into contact with each other. Therefore, while the support structure 20 including the connecting portion 16 is formed of resin or elastomer, excellent durability can be exhibited, and both weight reduction and durability can be achieved.

  In addition, since the connecting portion 16 that connects the inner annular portion 12 and the outer annular portion 14 is configured by the circumferential support wall 22 extending along the tire circumferential direction C, the increase in rigidity in the radial direction R is suppressed, The rigidity in the direction C can be effectively increased.

  3 to 5 show a non-pneumatic tire 10A according to the second embodiment. In this example, the point which combined the said circumferential direction support wall 22 and the width direction spoke 30 extended in the conventional tire axial direction A differs from 1st Embodiment.

  That is, in 2nd Embodiment, the connection part 16 is comprised by the circumferential direction support walls 22 and 22 of both ends, and the several width direction spoke 30 extended in the tire axial direction A. As shown in FIG. A plurality of the width direction spokes 30 are provided at intervals in the tire circumferential direction C. In this example, the width direction spokes 30 are arranged at equal intervals in the tire axial direction A and alternately with the circumferential support walls 22.

  In the present embodiment, the circumferential support walls 22 are provided intermittently, i.e. discontinuously, at intervals in the tire circumferential direction C. Therefore, as shown in FIGS. It is also possible to provide a full width of 12. Thus, by making the circumferential support wall 22 discontinuous, the degree of freedom in design when combined with the conventional width direction spoke is improved, which can contribute to improvement in rigidity. That is, when the capability of supporting the load is insufficient with only the circumferential support wall 22, it can be assisted by providing the width direction spoke 30. Moreover, since the spacing between the width direction spokes 30 can be widened by the presence of the circumferential support wall 22, even if the width direction spokes 30 are bent by a load, contact between the adjacent width direction spokes 30 and 30 can be performed. Can be avoided, and the durability is not impaired. About 2nd Embodiment, the other structure and effect are the same as 1st Embodiment, and description is abbreviate | omitted.

  In addition, in FIGS. 3-5, although the width direction spoke 30 extended in the tire axial direction A was provided as a spoke combined with the circumferential direction support wall 22, you may provide the spoke extended in the direction inclined with respect to the tire axial direction A. Good. Thus, by combining with the spokes that are inclined with respect to the tire axial direction A and have a circumferential component, the rigidity in the tire circumferential direction C can be further increased while suppressing the increase in the rigidity in the tire radial direction R.

  6 and 7 show a non-pneumatic tire 10B according to the third embodiment. This example differs from the second embodiment in that the circumferential support wall 22A is provided continuously in the tire circumferential direction C.

  That is, in the third embodiment, the left and right circumferential support walls 22A and 22A are continuously provided over the entire circumference in the tire circumferential direction C. Accordingly, the circumferential support wall 22A has a ring plate shape, and an inner peripheral edge thereof is connected to the inner annular portion 12 and an outer peripheral edge is connected to the outer annular portion 14, respectively.

  Further, in this example, since the circumferential support wall 22A is provided on the entire circumference, the width direction spoke 30A is not the full width of the inner annular portion 12, and the inner annular portion 12 does not interfere with the circumferential support wall 22A. Are arranged at intervals in the tire circumferential direction C.

  In the present embodiment, since the circumferential support wall 22A is continuous in the tire circumferential direction C, foreign matter such as pebbles can be prevented from entering the tire. About 3rd Embodiment, another structure and effect are the same as 2nd Embodiment, and description is abbreviate | omitted.

  8 and 9 show a non-pneumatic tire 10C according to the fourth embodiment. This example differs from the second embodiment in that the left and right circumferential support walls 22 and 22 are connected by an elastic member 32.

  That is, in the fourth embodiment, the circumferential support walls 22 and 22 arranged at both ends in the tire axial direction A are connected to each other by the elastic member 32 that regulates the distance between the support walls 22 and 22. The elastic member 32 is provided by connecting radial central portions 28 and 28 that are swelled outward in the axial direction A of the left and right circumferential support walls 22 and 22. In this example, the elastic member 32 is made of resin or metal. It consists of a leaf spring made of metal. As shown in FIG. 9, the elastic member 32 is provided for each pair of circumferential support walls 22, 22 provided at intervals in the tire circumferential direction C.

  The manufacturing method of the structure connected with the elastic member 32 in this way is not particularly limited. For example, the circumferential support wall 22 and the elastic member 32 may be separately formed and joined together, or alternatively Alternatively, the circumferential support wall 22 may be provided with holes or protrusions, and the elastic member 32 may be integrated so as to fit into it, or the circumferential support wall 22 and the elastic member 32 may be integrally formed.

  In this embodiment, when the left and right circumferential support walls 22 and 22 are bent and deformed outward in the tire axial direction A under the load, the left and right circumferential support walls 22 and 22 are The distance between 22 can be prevented from becoming excessively large, and excessive bending deformation of the circumferential support wall 22 can be suppressed. Thereby, the rigidity of the non-pneumatic tire 10C can be increased, and the durability can be further increased.

  The elastic member 32 is not limited to the plate spring as described above, and may be constituted by a spring as shown in FIG. 10, for example. Regarding the fourth embodiment, other configurations and operational effects are the same as those of the second embodiment, and a description thereof will be omitted.

  11 and 12 show a non-pneumatic tire 10D according to the fifth embodiment. This example differs from the first embodiment in that an intermediate annular portion 34 is provided between the inner annular portion 12 and the outer annular portion 14.

  The intermediate annular portion 34 has a cylindrical shape that coaxially surrounds the outer periphery of the inner annular portion 12, and is disposed at an intermediate position in the radial direction R between the inner annular portion 12 and the outer annular portion 14. The intermediate annular portion 34 constitutes the support structure 20 together with the inner annular portion 12, the outer annular portion 14, and the connecting portion 16, and is made of resin or elastomer as described above.

  By providing the intermediate annular portion 34 in this manner, the connecting portion 16 includes an inner connecting portion 36 that connects the inner annular portion 12 and the intermediate annular portion 34, and an outer connecting portion 38 that connects the intermediate annular portion 34 and the outer annular portion 14. It consists of and. In this example, the outer connecting portion 38 is constituted by the circumferential support wall 22, and the inner connecting portion 36 is constituted only by the width direction spoke 40 extending in the tire axial direction A. Specifically, the outer connecting portion 38 is configured by arranging a plurality of left and right circumferential support walls 22, 22 provided at both ends in the tire axial direction A at intervals in the tire circumferential direction C. . The inner connecting portion 36 is configured by arranging a plurality of width direction spokes 40 extending in the entire width in the tire axial direction A at intervals in the tire circumferential direction C.

  In the present embodiment, since the intermediate annular portion 34 is provided, the height of the circumferential support wall 22 (dimension in the tire radial direction R) can be reduced, so that the tire shaft when receiving a load. The amount of bending deformation outward in the direction A can be suppressed, and contact with an obstacle during actual vehicle travel can be suppressed. Further, in this example, the circumferential support wall 22 is provided in the outer connecting portion 38, and the outer connecting portion 38 generally tends to bend and deform more than the inner connecting portion 36, so that the contact between the spokes is suppressed. This is advantageous in terms of improving durability.

  The circumferential support wall 22 may be provided not only on the outer connecting portion 38 but also on the inner connecting portion 36, or may be provided on both the inner connecting portion 36 and the outer connecting portion 38. Regarding the fifth embodiment, other configurations and operational effects are the same as those of the first embodiment, and a description thereof will be omitted.

  The non-pneumatic tire according to some embodiments described above can be used as a substitute for a conventional pneumatic tire such as a pneumatic tire for passenger cars, and is a solid rubber structure type such as a solid tire or a cushion tire. It can be used as an alternative to non-pneumatic tires. Specific applications other than general pneumatic tires include, for example, wheelchair tires and construction vehicle tires.

  As Example 1, a non-pneumatic tire corresponding to the first embodiment shown in FIG. 1 having a resin support structure and a rubber tread portion was made as an experiment. Rim diameter (inner diameter of inner annular portion): 354.8 mm, tire cross-section height (radial height from inner circumferential surface of inner annular portion to tread surface): 83 mm, tread width: 140 mm, circumferential support wall There were 40 pairs of 22 (80 in total). The second embodiment has a structure in which the left and right circumferential support walls 22 and 22 are connected to each other by using a leaf spring as the elastic member 32 with respect to the first embodiment. Example 3 is an example corresponding to the second embodiment shown in FIG. 3 and has a structure in which 20 width-direction spokes 30 are added to Example 1. The fourth embodiment has a structure in which the left and right circumferential support walls 22 and 22 are connected to each other by using a leaf spring as the elastic member 32 with respect to the third embodiment. Further, as a control, a non-pneumatic tire of a comparative example in which only 40 width direction spokes were arranged in the tire circumferential direction without providing a circumferential support wall with respect to Example 1 was produced.

  Durability was evaluated about the obtained non-pneumatic tire of the Example and the comparative example. Durability is an indoor drum tester equipped with a drum with a diameter of 1.7 m, the test speed is 80 km / h, and the tire load is 85 according to JIS rules (JIS rules for pneumatic tires corresponding to tire sizes). Starting from%, the load was increased every specified time and finally it was run at 140%. The distance traveled until the failure was determined and evaluated using an index with the value of the comparative example as 100. It shows that durability is excellent, so that an index | exponent is large. A result is as showing in following Table 1, and in Example 1, it was excellent in durability rather than the comparative example comprised only in the width direction spoke. Moreover, durability was further improved in Example 2 in which the circumferential support walls were connected to each other by an elastic member. Further, in Examples 3 and 4 in which the width direction spokes were combined with the circumferential support walls in comparison with Examples 1 and 2, a further improvement effect of durability was obtained.

以上、いくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。

Although some embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention.

10, 10A, 10B, 10C, 10D ... non-pneumatic tires,
12 ... Inner ring part, 14 ... Outer ring part, 16 ... Connection part, 18 ... Tread part,
22, 22A ... circumferential support wall, 30, 30A ... width direction spoke, 32 ... elastic member 34 ... intermediate annular part, 36 ... inner connecting part, 38 ... outer connecting part,
A ... tire axial direction, C ... tire circumferential direction

Claims (4)

An inner annular portion, an outer annular portion surrounding the outer periphery of the inner annular portion, a connecting portion connecting the inner annular portion and the outer annular portion, and a tread portion provided on the outer periphery of the outer annular portion. In non-pneumatic tires,
The connecting portion includes a circumferential support wall that is provided at both ends in the tire axial direction, extends in the tire circumferential direction, and is made of resin or elastomer, and the circumferential support wall is curved to bulge outward in the tire axial direction. a plate-shaped wall portion having a Jo or bent cross-sectional shape, whereby said has circumferential support wall of the end portions is formed in a convex shape toward the axially outer side respectively, the circumferential support wall A non-pneumatic tire provided continuously over the entire circumference in the tire circumferential direction . An inner annular portion, an outer annular portion surrounding the outer periphery of the inner annular portion, a connecting portion connecting the inner annular portion and the outer annular portion, and a tread portion provided on the outer periphery of the outer annular portion. In non-pneumatic tires,
The connecting portions include circumferential support walls provided at both ends in the tire axial direction and extending in the tire circumferential direction and made of resin or elastomer, and the circumferential support walls at the both ends are respectively directed outward in the tire axial direction. Formed into a convex shape,
The circumferential support wall disposed in the tire axial direction end portion, which is connected by an elastic member for regulating the distance between both circumferential supporting walls, non-pneumatic tire. 2. The connecting portion includes a plurality of spokes that extend in the tire axial direction or a direction inclined with respect to the tire axial direction together with the circumferential support wall and are arranged at intervals in the tire circumferential direction. Or the non-pneumatic tire of 2. An intermediate annular part is provided between the inner annular part and the outer annular part, and the connecting part includes an inner connecting part that connects the inner annular part and the intermediate annular part, and the intermediate annular part and the outer annular part. The non-pneumatic tire according to any one of claims 1 to 3 , comprising an outer connecting portion to be connected, wherein at least one of the inner connecting portion and the outer connecting portion includes the circumferential support wall.

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