Non-pneumatic tire

Abstract

To provide a non-pneumatic tire capable of inhibiting malfunctions of an embedded electronic component.SOLUTION: A non-pneumatic tire includes: an inner annular part; an outer annular part concentrically disposed at the tire radial outer side of the inner annular part; a connection part which connects the inner annular part with the outer annular part; and an electronic component embedded in the inner annular part or the outer annular part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a non-pneumatic tire.

Background Art

[0002] Patent Document 1 discloses a non-pneumatic tire in which electronic components are embedded. However, the patent document does not disclose the embedding positions of the electronic components in the non-pneumatic tire, and depending on the embedding positions of the electronic components, there is a risk that the electronic components may malfunction due to deformation of the non-pneumatic tire during grounding or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a non-pneumatic tire capable of suppressing malfunction of embedded electronic components.

Means for Solving the Problems

[0005] The non-pneumatic tire of the present disclosure includes an inner annular portion, an outer annular portion concentrically disposed radially outside the tire diameter of the inner annular portion, a connecting portion connecting the inner annular portion and the outer annular portion, and an electronic component embedded in the inner annular portion or the outer annular portion.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0007] <Embodiment 1> Hereinafter, Embodiment 1 of the non-pneumatic tire of the present disclosure will be described with reference to FIGS. 1 to 4. In each figure (the same applies to FIGS. 5 to 8), the dimensional ratio in the drawing does not necessarily match the actual dimensional ratio, and the dimensional ratios between the drawings do not necessarily match either.

[0008] In each figure, the first direction D1 is the tire axial direction D1 parallel to the axis 1b that is the rotation center of the non-pneumatic tire (hereinafter also referred to as "tire") 1, the second direction D2 is the tire diameter direction D2 that is the diameter direction of the tire 1, and the third direction D3 is the tire circumferential direction D3 that is the direction around the axis 1b. Also, the tire equatorial plane S1 is a plane orthogonal to the axis 1b and located at the center of the tire 1 in the tire axial direction D1, and the tire meridian plane is a plane including the axis 1b and orthogonal to the tire equatorial plane S1.

[0009] Note that in the tire axial direction D1, the inner side is the side closer to the tire equatorial plane S1, and the outer side is the side farther from the tire equatorial plane S1. Also, in the tire diameter direction D2, the inner side is the side closer to the axis 1b, and the outer side is the side farther from the axis 1b.

[0010] As shown in FIGS. 1 and 2, the tire 1 according to Embodiment 1 includes an inner annular portion 2, an outer annular portion 3 concentrically arranged outside the inner annular portion 2, and a connecting portion 1d connecting the inner annular portion 2 and the outer annular portion 3. A tread 6 that contacts the ground is provided outside the outer annular portion 3 in the tire radial direction D2. The tire 1 may be provided with a fitting member for an axle or a wheel or the like inside the inner annular portion 2 in the tire radial direction D2.

[0011] The inner annular portion 2, the outer annular portion 3, and the connecting portion 1d (hereinafter also collectively referred to as the "support structure 1a") support the load from the vehicle. The support structure 1a is preferably formed of an elastic material. Examples of the base material of the support structure 1a include thermoplastic elastomers such as polyester elastomers, crosslinked rubbers such as natural rubber, or other resins (for example, thermoplastic resins such as polyethylene resins, thermosetting resins such as polyurethane resins).

[0012] From the viewpoint of improving uniformity, the inner annular portion 2 is preferably in a cylindrical shape with a constant thickness (dimensions in the tire radial direction D2, including not only the same but also substantially the same with errors such as manufacturing errors). The thickness of the inner annular portion 2 is not particularly limited, but is appropriately set from the viewpoints of sufficiently transmitting force to the connecting portion 1d and achieving weight reduction and durability improvement.

[0013] The width (dimensions in the tire axial direction D1) of the inner annular portion 2 is appropriately set according to the application or the like. On the inner peripheral surface of the inner annular portion 2 in the tire radial direction D2, it is preferable to provide protrusions (or depressions) 2a for maintaining fitting for mounting to an axle or a wheel.

[0014] The inner annular portion 2 is provided with an inner reinforcing layer 21 embedded in the inner annular portion 2 to enhance the rigidity of the inner annular portion 2. The inner reinforcing layer 21 is not particularly limited, but for example, it is formed of fiber-reinforced plastic (FRP). Examples of the fiber-reinforced plastic include glass fiber-reinforced plastic (GFRP) and carbon fiber-reinforced plastic (CFRP). Examples of the material of the inner reinforcing layer 21 include, in addition to fiber-reinforced plastic, steel cord, a cylindrical metal ring, and a high-modulus resin ring.

[0015] The inner reinforcing layer 21 may be composed of a single layer or may be composed of a plurality of layers (each layer having the same material or each layer having a different material). When composed of a plurality of layers, the inner reinforcing layer 21 may be a single reinforcing layer wound in a spiral shape or may be a plurality of reinforcing layers arranged concentrically. The inner reinforcing layer 21 may extend continuously along the tire circumferential direction D3 or may extend discontinuously.

[0016] From the viewpoint of improving uniformity, the outer annular portion 3 preferably has a cylindrical shape with a constant thickness (dimension in the tire radial direction D2) (including the same and substantially the same). The thickness of the outer annular portion 3 is appropriately set from the viewpoints of sufficiently transmitting the force from the connecting portion 1d and achieving weight reduction and durability improvement. The width (dimension in the tire axial direction D1) of the outer annular portion 3 is appropriately set according to the application and the like.

[0017] The outer annular portion 3 is provided with an outer reinforcing layer 31 embedded in the outer annular portion 3 to enhance the rigidity of the outer annular portion 3. The outer reinforcing layer 31 is not particularly limited, but for example, it is formed of fiber-reinforced plastic in the same manner as the inner reinforcing layer 21. Examples of the material of the outer reinforcing layer 31 include, in addition to fiber-reinforced plastic, steel cord, a cylindrical metal ring, and a high-modulus resin ring.

[0018] The outer reinforcing layer 31 may be composed of a single layer or a plurality of layers (each layer being the same material or each layer being a different material). When composed of a plurality of layers, the outer reinforcing layer 31 may be a single reinforcing layer wound in a spiral shape or a plurality of reinforcing layers arranged concentrically. The outer reinforcing layer 31 may extend continuously along the tire circumferential direction D3 or may extend discontinuously.

[0019] The connecting portion 1d includes a plurality of first connecting portions 4 and a plurality of second connecting portions 5. The first connecting portion 4 and the second connecting portion 5 are each independently arranged in the tire circumferential direction D3. Note that the connecting portion 1d may extend continuously, for example, in the tire circumferential direction D3. The first connecting portion 4 and the second connecting portion 5 may be connected at least partially in the tire circumferential direction D3, for example.

[0020] The first connecting portion 4 and the second connecting portion 5 are formed in a plate shape and arranged along the tire circumferential direction D3. The number of the first connecting portions 4 and the second connecting portions 5 is not particularly limited, but is appropriately set, for example, from the viewpoints of sufficiently supporting the load from the vehicle while achieving weight reduction, noise reduction, improvement of power transmission, and improvement of durability.

[0021] The plurality of first connecting portions 4 and second connecting portions 5 are arranged in parallel along the tire circumferential direction D3 with a gap G1 therebetween alternately. Each gap G1 is preferably constant (including the same and substantially the same) from the viewpoint of improving uniformity.

[0022] The thickness (dimension in the tire circumferential direction D3) of the first connecting portion 4 and the second connecting portion 5 is not particularly limited, but, for example, it widens toward the outside in the tire radial direction D2 so that the gap G1 is constant (including the same and substantially the same) in the tire radial direction D2. The thickness of the first connecting portion 4 and the second connecting portion 5 is appropriately set from the viewpoints of sufficiently transmitting the force from the inner annular portion 2 and the outer annular portion 3 while achieving weight reduction and improvement of durability. Note that the first connecting portion 4 and the second connecting portion 5 may have, for example, a constant thickness (including the same and substantially the same), and the gap G1 may widen toward the outside in the tire radial direction D2.

[0023] As shown in FIGS. 3 and 4, the first connecting portion 4 extends from one side D1a in the tire axial direction D1 of the inner annular portion 2 (the right side in FIGS. 3 and 4, hereinafter also referred to as the "first axial direction side") to the other side D1b in the tire axial direction D1 of the outer annular portion 3 (the left side in FIGS. 3 and 4, hereinafter also referred to as the "second axial direction side"). Further, the second connecting portion 5 extends from the second axial direction side D1b of the inner annular portion 2 to the first axial direction side D1a of the outer annular portion 3.

[0024] The first connecting portion 4 and the second connecting portion 5 extend so as to be inclined in opposite directions and intersect in the view of the tire circumferential direction D3. That is, the first connecting portion 4 and the second connecting portion 5 are arranged in a substantially X shape in the view of the tire circumferential direction D3. As a result, a closed space 1c is formed between the first connecting portion 4 and the second connecting portion 5 in the view of the tire circumferential direction D3. As a result, the elasticity of the connecting portion 1d can be enhanced, and thus the riding comfort performance of the vehicle can be improved. Note that the first connecting portion 4 and the second connecting portion 5 may extend so as to be inclined in the same direction, for example.

[0025] The width (dimension in the tire axial direction D1) of the inner end portion 4a of the first connecting portion 4 in the tire radial direction D2 is larger than the width of the central portion 4b of the first connecting portion 4, and the width of the outer end portion 4c of the first connecting portion 4 in the tire radial direction D2 is larger than the width of the central portion 4b of the first connecting portion 4. Specifically, the width of the first connecting portion 4 is constant (including the same and substantially the same) at the central portion 4b and increases from the central portion 4b toward the end portions 4a and 4c. The widths of the inner end portion 5a, the central portion 5b, and the outer end portion 5c of the second connecting portion 5 have the same relationship as the widths of the inner end portion 4a, the central portion 4b, and the outer end portion 4c of the first connecting portion 4, respectively. The widths of the first connecting portion 4 and the second connecting portion 5 are not particularly limited, but are appropriately set, for example, from the viewpoint of sufficiently transmitting the forces from the inner annular portion 2 and the outer annular portion 3 while achieving weight reduction and improvement in durability.

[0026] The relationship (size relationship, ratio) between the width and thickness of the first connecting portion 4 and the second connecting portion 5 is not particularly limited, but is appropriately set from the viewpoint of reducing the ground contact pressure dispersion while improving durability. The average width of the first connecting portion 4 and the second connecting portion 5 is preferably larger than the average thickness of the first connecting portion 4 and the second connecting portion 5.

[0027] The tread 6 is made of rubber, resin, or the like, similar to a conventional pneumatic tire, and may have a pattern (groove) on its outer peripheral surface, similar to a conventional pneumatic tire. The tread 6 is attached to the outer peripheral surface of the outer annular portion 3, for example, by a vulcanizing adhesive.

[0028] In the present embodiment, the tread 6 is composed of a plurality of layers. The tread 6 includes a first layer 6a that contacts the ground and a second layer 6b that is disposed inside the first layer 6a in the tire radial direction D2. Note that the tread 6 may be composed of a single layer (for example, only the first layer 6a).

[0029] As shown in FIGS. 2 to 4, the tire 1 includes an electronic component 7, and the electronic component 7 is embedded in the inner annular portion 2. The electronic component 7 is provided inside the inner annular portion 2 so as not to be exposed on the surface. In the present embodiment, the electronic component 7 is not embedded in the outer annular portion 3 and the connecting portion 1d. The electronic component 7 is not particularly limited, but includes, for example, a storage unit for storing information and a communication unit for communicating with the outside. Thereby, the information in the storage unit can be read by a reading device (reader) or the storage unit can be stored with information by a writing device (writer).

[0030] In this embodiment, the electronic component 7 is not particularly limited, but for example, it is an RFID tag. The RFID tag is a passive transponder and performs wireless communication with an external device such as a reader or a writer. The RFID tag includes an RFID chip having a storage unit and an antenna corresponding to a communication unit. As the antenna, various types of antennas such as a coil-shaped spring antenna, a plate-shaped antenna, and a rod-shaped antenna can be used. For example, an antenna formed by printing a predetermined pattern on a flexible substrate may be used. The storage unit in the chip can store identification information such as the manufacturing number and the component number of the tire 1, tire information such as the size and speed range of the tire 1, manufacturing information such as the manufacturing date, manufacturing location, and lot of the used material, usage management information such as the usage period, mileage, wear state, trauma, and inspection time, and retread information (number of times) of the tread 6, etc.

[0031] Thereby, even in a non-pneumatic tire in which the area where information can be displayed is smaller than that of a pneumatic tire, the above information can be managed. Note that the electronic component 7 may be, for example, an IC tag, or may be a piezoelectric element, a strain sensor, etc. that includes a detection unit for detecting the state of the tire 1 and a communication unit. The tire 1 may be configured to include a plurality of identical or different electronic components 7, and each electronic component 7 may be embedded in the inner annular portion 2.

[0032] From the viewpoint of more surely suppressing the failure of the electronic component 7 due to the deformation of the inner annular portion 2, it is preferable that the electronic component 7 is arranged in direct or indirect contact with the inner reinforcing layer 21 (via an adhesive or a coating material described later). That is, it is preferable that the electronic component 7 is arranged between the inner reinforcing layer 21 and the material of the inner annular portion 2. When the tire 1 receives an external force, the displacement amount of the inner annular portion 2 near the inner reinforcing layer 21 becomes close to the displacement amount of the inner reinforcing layer 21 having higher rigidity than the base material of the inner annular portion 2. Therefore, the failure of the electronic component 7 due to the deformation of the inner annular portion 2 is less likely to occur. When the inner reinforcing layer 21 is composed of a plurality of layers, from the viewpoint of increasing the adhesive strength with the electronic component 7, it is preferable that the electronic component 7 is arranged between the plurality of layers of the inner reinforcing layer 21.

[0033] From the viewpoint of more surely suppressing the failure of the electronic component 7 due to the deformation of the inner annular portion 2, it is preferable that the electronic component 7 is disposed inside the inner reinforcing layer 21 in the tire radial direction D2.

[0034] From the viewpoints of suppressing the failure of the electronic component 7 and making it easier for a reading device or the like to approach the electronic component 7 from the outside in the tire radial direction D2 of the inner annular portion 2, the electronic component 7 is disposed within a position (first non-connection position) X1 avoiding the connection position between the inner annular portion 2 and the connection portion 1d.

[0035] As shown in FIG. 4, the tire 1 includes a mark portion 8 indicating the position where the electronic component 7 is embedded. The mark portion 8 is not particularly limited. For example, the mark portion 8 is disposed on the outer peripheral surface of the inner annular portion 2 so as to overlap the position where the electronic component 7 is embedded in the tire radial direction D2 view. Note that the mark portion 8 may be disposed on the side surface (one or both of the tire axial directions D1) of the inner annular portion 2 so as to overlap the position where the electronic component 7 is embedded in the tire axial direction D1 view, or may be disposed on the inner peripheral surface of the inner annular portion 2 or the outer annular portion 3. The mark portion 8 is not particularly limited. For example, the mark portion 8 is a triangular (round or the like is also possible) depression or protrusion.

[0036] Next, an example of a method for embedding the electronic component 7 in the inner annular portion 2 will be illustrated.

[0037] First, the electronic component 7 is set in a mold for molding the support structure 1a. In the present embodiment, the inner reinforcing layer 21 with the electronic component 7 attached or placed thereon is set in the mold of the support structure 1a. If necessary, the outer reinforcing layer 31 is also set in the mold. When the inner reinforcing layer 21 is composed of a plurality of layers, the electronic component 7 may be sandwiched between the plurality of layers. Next, a material is injected into the mold and cured to mold the support structure 1a. Thereby, the electronic component 7 can be embedded in the inner annular portion 2. Thereafter, the tread 6 is attached to the outer peripheral surface of the outer annular portion 3.

[0038] Before attaching or placing the electronic component 7 on the inner reinforcing layer 21, for example, the electronic component 7 may be coated with the same material as the support structure 1a (or a different material). Thereby, the coated electronic component 7 can be joined to the inner reinforcing layer 21, and it is possible to make it difficult to peel off the electronic component 7.

[0039] When the electronic component 7 is coated, in order to increase the bonding strength between the coating and the injection material during molding, it is preferable to perform a surface treatment on the outer surface of the coating.

[0040] For example, after molding the support structure 1a, a depression may be provided in the inner annular portion 2, the electronic component 7 may be attached or placed in the depression, and the electronic component 7 may be embedded in the inner annular portion 2 by covering the depression with a lid.

[0041] <Embodiment 2> Hereinafter, Embodiment 2 will be described with reference to FIGS. 5 and 6. As shown in FIGS. 5 and 6, in Embodiment 2, the electronic component 7 is embedded in the outer annular portion 3. Note that the tire 1 may be configured to include a plurality of identical or different electronic components 7, and each electronic component 7 may be embedded in the outer annular portion 3.

[0042] From the viewpoint of suppressing the failure of the electronic component 7 due to the deformation of the outer annular portion 3, the electronic component 7 is preferably disposed in contact with the outer reinforcing layer 31. That is, the electronic component 7 is preferably disposed between the outer reinforcing layer 31 and the material of the outer annular portion 3. When the outer reinforcing layer 31 is composed of a plurality of layers, from the viewpoint of increasing the bonding strength with the electronic component 7, the electronic component 7 is preferably disposed between the plurality of layers of the outer reinforcing layer 31.

[0043] From the viewpoint of suppressing the failure of the electronic component 7 due to the deformation of the outer annular portion 3 and improving the communication between the electronic component 7 and a reading device or the like, the electronic component 7 is preferably disposed within a position (second non-connection position) X2 that avoids the connection position between the outer annular portion 3 and the connection portion 1d.

[0044] The electronic component 7 is preferably disposed inside the outer reinforcing layer 31 in the tire radial direction D2 from the viewpoint of suppressing the failure of the electronic component 7 due to the deformation of the outer annular portion 3 or the tread 6.

[0045] The outer annular portion 3 is provided with a mark portion 8 indicating the position where the electronic component 7 is embedded. The mark portion 8 is not particularly limited. For example, the mark portion 8 is disposed on the inner peripheral surface of the outer annular portion 3 so as to overlap the position where the electronic component 7 is embedded in the tire radial direction D2 view. Note that the mark portion 8 may be disposed on one side surface or both side surfaces of the outer annular portion 3 so as to overlap the position where the electronic component 7 is embedded in the tire axial direction D1 view, or may be disposed on the inner annular portion 2. The mark portion 8 is not particularly limited. For example, the mark portion 8 is a triangular (or circular) depression or protrusion.

[0046] Since other configurations are the same as those in the first embodiment, the description thereof is omitted. The method of embedding the electronic component 7 is the same as that in the first embodiment.

[0047] <Embodiment 3> Hereinafter, Embodiment 3 will be described with reference to FIGS. 7 and 8. As shown in FIGS. 7 and 8, in Embodiment 3, the inner annular portion 2 is provided with a protrusion 9 in which the electronic component 7 is embedded and which protrudes from the inner annular portion 2 toward the connecting portion 1d side (outer side) in the tire radial direction D2.

[0048] Note that the outer annular portion 3 may be configured to include a protrusion 9 protruding toward the connecting portion 1d side (inner side) in the tire radial direction D2. Further, the tire 1 may be configured to include a plurality of identical or different electronic components 7, and the inner annular portion 2 and / or the outer annular portion 3 may be configured to include a plurality of protrusions 9 in which each electronic component 7 is embedded.

[0049] The protrusion 9 is preferably disposed on the outer peripheral surface of the inner annular portion 2 having less deformation than the outer annular portion 3 from the viewpoint of suppressing the failure of the electronic component 7 due to the deformation of the support structure 1a.

[0050] From the viewpoint of more surely suppressing the failure of the electronic component 7, the protrusion 9 is preferably disposed at the first non-connection position X1 (the second non-connection position X2). Note that, from the viewpoint of enhancing the joining strength with the support structure 1a, the protrusion 9 may be connected to, for example, the inner end portions 4a, 5a (outer end portions 4c, 5c) of the first connection portion 4 and the second connection portion 5.

[0051] The protrusion 9 is not particularly limited. For example, the protrusion 9 includes a display surface 91 for displaying information of the tire 1. Examples of the information displayed on the display surface 91 include characters, symbols, figures, barcodes, two-dimensional barcodes, etc. indicating identification information such as a manufacturing number and a part number, and manufacturing information such as a tire size and a manufacturing date.

[0052] From the viewpoint of enhancing the workability of the display surface 91 and the visibility of the display surface 91, the protrusion 9 is preferably disposed outside in the tire axial direction D1. From the viewpoint of preventing breakage due to buckling of the protrusion 9, the protrusion 9 is preferably connected to only one of the inner annular portion 2 and the outer annular portion 3. That is, it is preferable that the inner annular portion 2 and the outer annular portion 3 are not connected by the protrusion 9.

[0053] The protrusion 9 is not particularly limited. For example, the protrusion 9 is formed in a substantially quadrangular flat plate shape, and the display surface 91 (when not provided with the display surface 91, the surface corresponding to the display surface 91) is disposed in a direction intersecting the tire axial direction D1. Note that, for example, the display surface 91 may be disposed in a direction intersecting the tire radial direction D2, or the display surface 91 may be disposed at a position intersecting the tire circumferential direction D3.

[0054] From the viewpoint of enhancing the joining strength with the support structure 1a, for example, the protrusion 9 is preferably integrally formed with the inner annular portion 2 (outer annular portion 3). Note that, for example, the protrusion 9 may be formed separately from the inner annular portion 2 (outer annular portion 3) and joined to the inner annular portion 2 (outer annular portion 3) by adhesion or welding. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

[0055] As described above, like the above-described embodiment, the tire 1 preferably has a configuration including an inner annular portion 2, an outer annular portion 3 disposed concentrically outside the inner annular portion 2 in the tire radial direction D2, a connecting portion 1d that connects the inner annular portion 2 and the outer annular portion 3, and an electronic component 7 embedded in the inner annular portion 2 or the outer annular portion 3.

[0056] According to such a configuration, by embedding the electronic component 7 in the inner annular portion 2 or the outer annular portion 3, which has less deformation compared to the connecting portion 1d, it is possible to suppress the failure of the embedded electronic component 7.

[0057] Further, by embedding the electronic component 7 in the inner annular portion 2 or the outer annular portion 3, for example, even when the electronic component 7 peels off within the inner annular portion 2 or the outer annular portion 3, it is possible to suppress the electronic component 7 from peeling off and falling from the inner annular portion 2 or the outer annular portion 3. Furthermore, by embedding the electronic component 7 in the inner annular portion 2 or the outer annular portion 3, for example, it is possible to suppress the electronic component 7 from being unintentionally replaced or the like.

[0058] Also, in the tire 1 according to the above-described embodiment, it is preferable that the electronic component 7 is embedded only in the inner annular portion 2.

[0059] According to such a configuration, by embedding the electronic component 7 in the inner annular portion 2, which is mounted on the wheel, has less deformation compared to the outer annular portion 3, and is less affected by the heat generated by the deformation of the tread 6 and the connecting portion 1d, it is possible to suppress the failure of the embedded electronic component 7.

[0060] Also, in the tire 1 according to the above-described embodiment, the electronic component 7 may be embedded only in the outer annular portion 3.

[0061] According to such a configuration, by embedding the electronic component 7 in the outer annular portion 3, which has less deformation compared to the connecting portion 1d, it is possible to suppress the failure of the embedded electronic component 7.

[0062] Further, in the tire 1 according to the above embodiment, it is preferable that the electronic component 7 is embedded at a position (inside the first non-connection position X1 or inside the second non-connection position X2) avoiding the connection position between the inner annular portion 2 or the outer annular portion 3 and the connection portion 1d.

[0063] According to such a configuration, by embedding the electronic component 7 inside the first non-connection position X1 or the second non-connection position X2 where the influence of the load from the connection portion 1d is small and the deformation is small, it is possible to suppress the failure of the embedded electronic component 7.

[0064] Further, in the tire 1 according to the above embodiment, it is preferable that the inner annular portion 2 or the outer annular portion 3 is provided with a protrusion 9 protruding toward the connection portion 1d side in the tire radial direction D2, and the electronic component 7 is embedded in the protrusion 9.

[0065] According to such a configuration, by embedding the electronic component 7 in the protrusion 9 of the inner annular portion 2 or the outer annular portion 3 with less deformation compared to the connection portion 1d, it is possible to suppress the failure of the embedded electronic component 7. Further, by embedding the electronic component 7 in the protrusion 9, the protrusion 9 can be used as a mark at the position where the electronic component 7 is embedded.

[0066] Note that the tire 1 is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. Also, the tire 1 can of course be variously modified within a range not departing from the gist of the present invention. For example, it goes without saying that the configurations and methods according to the above-described Embodiments 1 to 3 can be arbitrarily selected singly or in plurality and adopted in the configurations and methods according to other embodiments.

Explanation of Reference Numerals

[0067] 1... Non-pneumatic tire, 1a... Support structure, 1b... Axle center, 1c... Closed space, 1d... Connection portion, 2... Inner annular portion, 21... Inner reinforcing layer, 3... Outer annular portion, 31... Outer reinforcing layer, 4... First connection portion, 5... Second connection portion, 6... Tread, 7... Electronic component, 8... Marking portion, 9... Protrusion, 91... Display surface, X1... First non-connection position, X2... Second non-connection position

Claims

1. An airless tire comprising: an inner annular portion; an outer annular portion concentrically arranged radially outside the inner annular portion in the tire diameter direction; a connecting portion connecting the inner annular portion and the outer annular portion; and an electronic component embedded in the inner annular portion or the outer annular portion. The inner annular portion or the outer annular portion has a protrusion protruding toward the connecting portion side in the tire diameter direction. The electronic component is embedded in the protrusion. The airless tire, wherein a thickness of the protrusion in the tire axial direction is smaller than a length of the protrusion in the tire diameter direction.

2. The airless tire according to claim 1, wherein the protrusion is provided on the inner annular portion.

3. The airless tire according to claim 1, wherein the protrusion is provided on the outer annular portion.

4. The airless tire according to any one of claims 1 to 3, wherein the protrusion is arranged at a position avoiding a connection position between the inner annular portion or the outer annular portion and the connecting portion.

5. The airless tire according to claim 1, wherein the protrusion has a display surface for displaying tire information.

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