JP2021030902A - Non-pneumatic tire - Google Patents

Abstract

To provide a non-pneumatic tire making it possible to prevent that outer joint parts of connection parts adjacent to each other may be separated from each other in a tire circumferential direction.SOLUTION: A non-pneumatic tire includes a plurality of connection parts, each of which includes: a first connection part 4 extended from one side in a tire width direction of an inner annular part toward the other side in a tire width direction of an outer annular part 3; and a second connection part 5 extended from the other side in the tire width direction of the inner annular part toward one side in the tire width direction of the outer annular part 3. The connection parts include an outer connection part connecting to the outer annular part 3. A longitudinal direction of the outer connection part intersects with a tire width direction D1.SELECTED DRAWING: Figure 7

Description

The present invention relates to non-pneumatic tires.

Conventionally, for example, a non-pneumatic tire includes an inner annular portion and an outer annular portion arranged concentrically, and a plurality of connecting portions that connect the inner annular portion and the outer annular portion and are arranged in parallel in the tire circumferential direction. (For example, Patent Document 1). The plurality of connecting portions are a first connecting portion extending from one side of the inner annular portion in the tire width direction toward the other side in the tire width direction of the outer annular portion, and a tire of the inner annular portion from the other side in the tire width direction to the outer annular portion. It is provided with a second connecting portion extending toward one side in the width direction.

The connecting portion includes an outer joint portion that joins with the outer annular portion. Since the longitudinal direction of the outer joint is parallel to the tire width direction, the outer joints of the adjacent connecting portions are separated from each other in the tire circumferential direction. As a result, for example, in the tire circumferential direction, a difference in rigidity is generated in the outer annular portion.

JP-A-2015-39986

Therefore, an object of the present invention is to provide a non-pneumatic tire capable of suppressing the outer joints of adjacent connecting portions from being separated from each other in the tire circumferential direction.

The non-pneumatic tire includes an inner annular portion and an outer annular portion arranged concentrically, and a plurality of connecting portions that connect the inner annular portion and the outer annular portion and are arranged in parallel in the tire circumferential direction. The plurality of connecting portions are the first connecting portion extending from one side of the inner annular portion in the tire width direction toward the other side of the outer annular portion in the tire width direction, and the inner annular portion from the other side in the tire width direction. The outer annular portion includes a second connecting portion extending toward one side in the tire width direction, the connecting portion includes an outer joint portion that joins the outer annular portion, and the longitudinal direction of the outer joint portion is a tire. Crosses in the width direction.

Further, in the non-pneumatic tire, the outer joint portion of the connecting portion may overlap with the outer joint portion of the connecting portion adjacent to the connecting portion in the tire width direction.

Further, in the non-pneumatic tire, the outer joint portion of the first connecting portion may overlap with the outer joint portion of the second connecting portion in the tire circumferential direction.

Further, in a non-pneumatic tire, on the side where the longitudinal direction of the outer joint portion of the first connecting portion is inclined with respect to the tire width direction, the longitudinal direction of the outer joint portion of the second connecting portion is the tire width direction. It may be configured to be opposite to the side that is inclined with respect to.

Further, in a non-pneumatic tire, the connecting portion is formed in a plate shape, and on the side where the thickness direction of the first connecting portion is inclined with respect to the tire width direction, the thickness direction of the second connecting portion is the tire width. It may be configured to be opposite to the side inclined with respect to the direction.

Further, in a non-pneumatic tire, the first connecting portion and the second connecting portion are alternately arranged in the tire circumferential direction, and the connecting portion includes an inner joint portion to be joined to the inner annular portion. The outer joint portion of the connecting portion may be configured to overlap the inner joint portion of the connecting portion adjacent to the connecting portion in the tire radial direction.

FIG. 1 is an overall side view of the non-pneumatic tire according to the embodiment. FIG. 2 is a diagram illustrating the first inclined side. FIG. 3 is a diagram illustrating the second inclined side. FIG. 4 is an enlarged view of the IV region of FIG. FIG. 5 is a perspective view of a main part of the non-pneumatic tire according to the embodiment. FIG. 6 is a developed view of the VI-VI curve cross section of FIG. FIG. 7 is a developed view of the VII-VII curve cross section of FIG. FIG. 8 is the same development view as that of FIG. 7, and is a diagram for explaining the operation of the tire. FIG. 9 is the same developed view as that of FIG. 7, and is a view showing the position of the inner joint portion in the tire radial direction. FIG. 10 is a side view of a main part of a non-pneumatic tire according to another embodiment. FIG. 11 is a perspective view of a main part of the non-pneumatic tire according to the embodiment. FIG. 12 is a developed view of the XII-XII curve cross section of FIG. FIG. 13 is a developed view of the XIII-XIII curve cross section of FIG. FIG. 14 is a cross-sectional view taken along the tire circumferential direction of the non-pneumatic tire according to still another embodiment, and is a developed view of the tire radial direction outward view. FIG. 15 is a cross-sectional view taken along the tire circumferential direction of the non-pneumatic tire according to still another embodiment, and is a developed view of the tire radial direction outward view.

Hereinafter, an embodiment of a non-pneumatic tire will be described with reference to FIGS. 1 to 9. In each drawing (the same applies to FIGS. 10 to 15), the dimensional ratio of the drawings and the actual dimensional ratio do not always match, and the dimensional ratios between the drawings do not necessarily match. Absent.

As shown in FIG. 1, the non-pneumatic tire (hereinafter, also simply referred to as “tire”) 1 according to the present embodiment includes a support structure 1a that supports a load from a vehicle. The support structure 1a includes an inner annular portion 2 and an outer annular portion 3 arranged concentrically, and a plurality of connecting portions 4 and 5 connecting the inner annular portion 2 and the outer annular portion 3. The outer annular portion 3 is arranged outside the inner annular portion 2 and houses the inner annular portion 2 inside, and the connecting portions 4 and 5 are between the inner annular portion 2 and the outer annular portion 3. Have been placed.

In each figure, the first direction D1 is the tire width direction D1 parallel to the axis of rotation of the tire 1, and the second direction D2 is the tire radial direction D2 which is the radial direction of the tire 1. The third direction D3 is the tire circumferential direction D3, which is the direction around the axis. Further, the tire equatorial plane S1 is a plane orthogonal to the axial center and is located at the center of the tire width direction D1 of the tire 1, and the tire meridional plane is a plane including the axial center and is the tire equatorial plane S1. It is a plane orthogonal to.

Of the tire width directions D1, one side D1a is referred to as the first width direction side D1a, and the other side D1b is referred to as the second width direction side D1b. Further, of the tire circumferential directions D3, one side D3a is referred to as a first circumferential direction D3a, and the other side D3b is referred to as a second circumferential direction D3b.

Further, in the tire width direction D1, the inside is on the side close to the tire equatorial plane S1, and the outside is on the side far from the tire equatorial plane S1. Further, in the tire radial direction D2, the inner side is on the side close to the axial center, and the outer side is on the side far from the axial center.

Further, as shown in FIG. 2, the side toward the first circumferential direction D3a as it goes to the first width direction side D1a (the side toward the second circumferential direction D3b as it goes to the second width direction side D1b) D4. Is referred to as the first inclined side D4. Then, as shown in FIG. 3, the side toward the second circumferential direction D3b as it goes to the first width direction side D1a (the side toward the first circumferential direction D3a as it goes to the second width direction side D1b) D5. Is referred to as the second inclined side D5.

In addition, "the inclined side with respect to the tire width direction D1 (tire circumferential direction D3) is the same" means that it is the same inclined side (for example, the first inclined side D4, D4 and the second inclined side D5, D5). To say. That is, even if the inclination angles with respect to the tire width direction D1 (tire circumferential direction D3) are different, if the inclination sides are the same D4 and D4 (D5, D5), "the inclination side with respect to the tire width direction D1 (tire circumferential direction D3) is Included in "is the same".

Further, "the inclined side with respect to the tire width direction D1 (tire circumferential direction D3) is opposite" means that it is the opposite inclined side (first inclined side D4 and second inclined side D5). That is, even if the inclination angle with respect to the tire width direction D1 (tire circumferential direction D3) is the same, if the inclination sides are opposite D4 and D5, "the inclination side with respect to the tire width direction D1 (tire circumferential direction D3) is opposite. "include.

Returning to FIG. 1, the tire 1 has a reinforcing layer 1b arranged outside the support structure 1a and a tread portion 1c arranged outside the reinforcing layer 1b and in contact with the ground in order to reinforce the support structure 1a. It has. Further, although not shown, the tire 1 may be provided with a member for fitting with an axle or a rim inside the support structure 1a. For example, it is preferable that the inner annular portion 2 is provided with irregularities or the like for maintaining the fitability on the inner peripheral surface for mounting on the axle or the rim.

The material of the support structure 1a is not particularly limited, but for example, the support structure 1a is made of an elastic material. Further, for example, as the base material of the support structure 1a, a thermoplastic elastomer such as a polyester elastomer, a crosslinked rubber such as a natural rubber, or another resin (for example, a thermoplastic resin such as a polyethylene resin, a thermosetting resin such as a polyurethane resin, etc.) Resin) may be adopted. Further, for example, a reinforcing material such as a fiber or a metal cord may be embedded inside the base material.

The reinforcing layer 1b includes, for example, a steel cord, a fiber reinforced plastic cord such as CFRP or GFRP arranged substantially parallel to the tire width direction D1, a cylindrical metal ring, a high modulus resin ring, or the like. It is composed of. Further, the tread portion 1c may be made of rubber, resin or the like like the conventional pneumatic tire, and may have a pattern (groove) on the outer peripheral surface like the conventional pneumatic tire.

From the viewpoint of improving uniformity, the inner annular portion 2 preferably has, for example, a cylindrical shape having a constant thickness (including not only the same but also substantially the same having an error such as a manufacturing error). The thickness of the inner annular portion 2 (dimension in the tire radial direction D2) is not particularly limited, but for example, from the viewpoint of reducing the weight and improving the durability while sufficiently transmitting the force to the connecting portions 4 and 5. It is set as appropriate.

The inner diameter of the inner annular portion 2 is not particularly limited, but is appropriately set according to, for example, the dimensions of the rim and the axle on which the tire 1 is mounted. The width of the inner annular portion 2 (dimension in the tire width direction D1) is not particularly limited, but is appropriately set according to, for example, the application, the length of the axle, and the like.

From the viewpoint of improving uniformity, the outer annular portion 3 preferably has, for example, a cylindrical shape having a constant thickness (including the same and substantially the same). The thickness of the outer annular portion 3 (dimension in the tire radial direction D2) is not particularly limited, but for example, from the viewpoint of sufficiently transmitting the force from the connecting portions 4 and 5 while reducing the weight and improving the durability. , Set as appropriate.

The inner diameter of the outer annular portion 3 is not particularly limited, but is appropriately set according to the intended use, for example. The width of the outer annular portion 3 (dimension in the tire width direction D1) is not particularly limited, but is appropriately set according to, for example, an application. The width of the outer annular portion 3 is preferably the same as the width of the inner annular portion 2.

As shown in FIGS. 4 to 6, the plurality of connecting portions 4 and 5 are arranged in parallel in the tire circumferential direction D3, have a pitch (gap) between them, and are provided independently of each other. .. For example, the pitch length is preferably constant (including the same and substantially the same) from the viewpoint of improving uniformity. The pitch length and the number of connecting portions 4 and 5 are not particularly limited, but for example, from the viewpoint of sufficiently supporting the load from the vehicle, reducing the weight, reducing noise, improving power transmission, and improving durability. And it is set appropriately.

The plurality of connecting portions 4 and 5 include a plurality of first connecting portions 4 and a plurality of second connecting portions 5. The first connecting portion 4 extends from the first width direction side D1a of the inner annular portion 2 toward the second width direction side D1b of the outer annular portion 3. Further, the second connecting portion 5 extends from the second width direction side D1b of the inner annular portion 2 toward the first width direction side D1a of the outer annular portion 3.

As described above, the first connecting portion 4 and the second connecting portion 5 extend so as to be inclined in opposite directions in the tire circumferential direction D3. The first connecting portion 4 and the second connecting portion 5 intersect with each other in the tire circumferential direction D3. As a result, the elasticity can be increased, so that the riding comfort performance can be improved. The first connecting portion 4 and the second connecting portion 5 are alternately arranged in parallel in the tire circumferential direction D3. As a result, the ground pressure distribution during traveling can be made smaller.

Further, although not particularly limited, in the present embodiment, the connecting portions 4 and 5 overlap with the connecting portions 5 and 4 adjacent to each other in the tire circumferential direction D3 in the tire width direction D1. Specifically, the end portion of the connecting portions 4 and 5 in the tire radial direction D2 overlaps the end portion of the connecting portions 5 and 4 adjacent in the tire circumferential direction D3 in the tire radial direction D2 in the tire width direction D1. ing. In addition, in this specification, "overlapping" includes not only the whole overlapping but also a part (partially) overlapping.

Further, the connecting portions 4 and 5 are formed in a plate shape. The configuration of the connecting portions 4 and 5 is not particularly limited, but in the present embodiment, the connecting portions 4 and 5 are a pair of flat surface portions 4a and 4a (5a, 5a, which are separated from each other in the thickness direction D6 of the connecting portions 4 and 5. 5a) and a pair of curved surface portions 4b, 4b (5b, 5b) separated from each other in the width direction D7 of the connecting portions 4, 5 are provided.

The thicknesses of the connecting portions 4 and 5 (dimensions in the thickness direction D6) are not particularly limited, but for example, while sufficiently transmitting the force from the inner annular portion 2 and the outer annular portion 3, weight reduction and durability are improved. From the viewpoint, it is set appropriately. The thickness of the connecting portions 4 and 5 may be, for example, gradually increased along the tire radial direction D2 (see FIG. 4), or may be constant (same and substantially the same) over the tire radial direction D2, for example. (Including), or for example, it may be configured to become larger toward each end in the tire radial direction D2.

The widths of the connecting portions 4 and 5 (dimensions in the width direction D7) are not particularly limited, but for example, while sufficiently transmitting the force from the inner annular portion 2 and the outer annular portion 3, weight reduction and durability are improved. It is set appropriately from the viewpoint. The widths of the connecting portions 4 and 5 may be increased, for example, toward the respective ends in the tire radial direction D2 (see FIG. 5), or may be gradually increased along the tire radial direction D2, for example. It may be configured to be constant (including the same and substantially the same) over the tire radial direction D2, for example.

The relationship (size relationship, ratio) between the width and the thickness of the connecting portions 4 and 5 is not particularly limited, but is appropriately set from the viewpoint of improving the durability and reducing the dispersion of the ground pressure. For example, the average width of the connecting portions 4 and 5 is preferably larger than the average thickness of the connecting portions 4 and 5. For example, the narrowest width of the connecting portions 4 and 5 may be larger than the thickest thickness of the connecting portions 4 and 5.

As shown in FIGS. 5 to 7, the connecting portions 4 and 5 include inner joint portions 4c and 5c to be joined to the inner annular portion 2 and outer joint portions 4d and 5d to be joined to the outer annular portion 3. .. The inner joint portion 4c and the outer joint portion 4d of the first connecting portion 4 are referred to as the first inner joint portion 4c and the first outer joint portion 4d, respectively, and the inner joint portion 5c and the outer joint portion 5 of the second connecting portion 5 5d is referred to as a second inner joint portion 5c and a second outer joint portion 5d, respectively.

The shapes of the inner joints 4c and 5c are not particularly limited, but in the present embodiment, the inner joints 4c and 5c are formed to be long. Specifically, the inner joint portions 4c and 5c are formed in a rectangular shape.

Further, the outer joint portions 4d and 5d are formed to be long. Specifically, the outer joints 4d and 5d extend along the longitudinal direction D8. The shapes of the outer joint portions 4d and 5d are not particularly limited, but in the present embodiment, the outer joint portions 4d and 5d are formed in a rectangular shape.

The longitudinal directions D8 of the outer joints 4d and 5d intersect with the tire width direction D1. As a result, the length of the outer joint portions 4d and 5d in the tire circumferential direction D3 becomes longer than that in the configuration in which the longitudinal direction D8 of the outer joint portions 4d and 5d is parallel to the tire width direction D1. Therefore, it is possible to prevent the outer joint portions 4d and 5d of the adjacent connecting portions 4 and 5 from being separated from each other in the tire circumferential direction D3.

In the present embodiment, the first outer joint portion 4d and the second outer joint portion 5d adjacent to each other in the tire circumferential direction D3 overlap each other in the tire width direction D1. As a result, the first outer joint portion 4d and the second outer joint portion 5d adjacent to each other in the tire circumferential direction D3 are continuous in the tire circumferential direction D3. Therefore, for example, it is possible to suppress the occurrence of a local rigidity difference in the outer annular portion 3 in the tire circumferential direction D3.

Moreover, the first outer joint portion 4d and the second outer joint portion 5d overlap each other in the tire circumferential direction D3. As a result, the first outer joint portion 4d and the second outer joint portion 5d are continuous in the tire width direction D1. Therefore, it is possible to suppress the occurrence of a local rigidity difference in the outer annular portion 3 in the tire width direction D1.

As described above, it is possible to effectively suppress the occurrence of a local rigidity difference in the outer annular portion 3 in the tire width direction D1 and the tire circumferential direction D3. Therefore, for example, it is possible to suppress the occurrence of vibration of the tire 1 during traveling.

The intersection angles θ1 and θ2 between the longitudinal direction D8 and the tire width direction D1 of the outer joint portions 4d and 5d are not particularly limited. For example, in the present embodiment, the intersection angle θ1 between the longitudinal direction D8 of the first outer joint portion 4d and the tire width direction D1 is the intersection angle θ2 between the longitudinal direction D8 of the second outer joint portion 5d and the tire width direction D1. Is the same as.

Further, in the connecting portions 4 and 5 formed in a plate shape, the curved surface portions 4b and 5b are easily elastically deformed, and the flat surface portions 4a and 5a are not easily elastically deformed. That is, the curved surface portions 4b and 5b have more elasticity than the flat surface portions 4a and 5a, and the flat surface portions 4a and 5a have more rigidity than the curved surface portions 4b and 5b. Then, during traveling, the curved surfaces 4b and 5b of the connecting portions 4 and 5 are elastically deformed, so that the connecting portions 4 and 5 are elastically deformed so as to fall or rise in the tire circumferential direction D3.

On the other hand, the width direction D7 of the connecting portions 4 and 5 is inclined with respect to the tire width direction D1. As a result, the curved surfaces 4b and 5b of the connecting portions 4 and 5 are elastically deformed, so that the deformation components of the connecting portions 4 and 5 are not only the deformation components in the tire radial direction D2 and the tire width direction D1 but also in the tire circumferential direction. A deformed component of D3 is also present. Therefore, the curved surfaces 4b and 5b of the connecting portions 4 and 5 are elastically deformed during traveling, so that not only the stress in the tire radial direction D2 and the tire width direction D1 but also the stress in the tire circumferential direction D3 can be relaxed. ..

Further, the side where the longitudinal direction D8 of the first outer joint portion 4d is inclined is the first inclined side D4, and the side where the longitudinal direction D8 of the second outer joint portion 5d is inclined is the second inclined side D5. As a result, the side D4 in which the longitudinal direction D8 of the first outer joint portion 4d is inclined with respect to the tire width direction D1 is the side D5 in which the longitudinal direction D8 of the second outer joint portion 5d is inclined with respect to the tire width direction D1. , The opposite. Therefore, for example, when the curved surfaces 4b and 5b of the connecting portions 4 and 5 are elastically deformed, the stress applied by the connecting portions 4 and 5 to the outer annular portion 3 can be dispersed.

The sides D4 and D5 in which the width direction D7 of the connecting portions 4 and 5 is inclined with respect to the tire width direction D1 are the sides D4 and D5 in which the longitudinal direction D8 of the outer joint portions 4d and 5d is inclined with respect to the tire width direction D1. Same as D5. Specifically, the side where the width direction D7 of the first connecting portion 4 and the longitudinal direction D8 of the first outer joint portion 4d are inclined is the first inclined side D4, respectively, and the width direction D7 and the width direction D7 of the second connecting portion 5 and The side on which the longitudinal direction D8 of the second outer joint portion 5d is inclined is the second inclined side D5, respectively.

Further, the sides D5 and D4 in which the thickness directions D6 of the connecting portions 4 and 5 are inclined with respect to the tire width direction D1 are the sides D5 in which the lateral joint portions 4d and 5d are inclined with respect to the tire width direction D1. , D4. Specifically, the side on which the thickness direction D6 of the first connecting portion 4 and the lateral direction D9 of the first outer joint portion 4d are inclined is the second inclined side D5, respectively, and the thickness direction D6 of the second connecting portion 5. The side on which the lateral side D9 of the second outer joint portion 5d is inclined is the first inclined side D4, respectively.

Although not particularly limited, in the present embodiment, the width direction D7 of the connecting portions 4 and 5 is parallel to the longitudinal direction D8 of the outer joint portions 4d and 5d (not only completely parallel but also substantially parallel). .. Further, although not particularly limited, in the present embodiment, the thickness direction D6 of the connecting portions 4 and 5 is parallel to the lateral joint portions 4d and 5d in the lateral direction D9 (including not only completely parallel but also substantially parallel). ).

By the way, since a large stress acts on the tire 1 during traveling, the connecting portions 4 and 5 are slightly elastically deformed in the thickness direction D6 so that the flat surfaces 4a and 5a of the connecting portions 4 and 5 are curved. At this time, since the flat surfaces 4a and 5a of the connecting portions 4 and 5 have high rigidity, large stresses F1 and F2 act on the outer annular portion 3 in the thickness direction D6 of the connecting portions 4 and 5.

On the other hand, the side D5 in which the thickness direction D6 of the first connecting portion 4 is inclined with respect to the tire width direction D1 is the side D4 in which the thickness direction D6 of the second connecting portion 5 is inclined with respect to the tire width direction D1. It's the opposite. As a result, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, the stress F1 applied to the outer annular portion 3 by the first connecting portion 4 is applied to the outer annular portion 3 on the side D5 on which the stress F1 acts. It is opposite to the working side D4 of the applied stress F2. Therefore, the stresses F1 and F2 can be dispersed.

The stresses F1 and F2 in FIG. 7 indicate a case where the rotation direction D10 of the tire 1 is the first circumferential direction side D3a. As described above, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, the stresses F1 and F2 applied by the connecting portions 4 and 5 to the outer annular portion 3 are in the thickness direction D6 of the connecting portions 4 and 5. , Works on the opposite side of the rotation direction D10.

For example, in the rotation direction D10 of FIG. 7, the thickness directions D6 of the connecting portions 4 and 5 are toward the inside of the tire width direction D1 as they go in the rotation direction D10. As a result, in FIG. 7, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, the stresses F1 and F2 applied to the outer annular portion 3 by the connecting portions 4 and 5 are on the opposite side to the rotational direction D10. Therefore, it works toward the outside of the tire width direction D1.

Therefore, since the stress F1 given to the outer annular portion 3 by the first connecting portion 4 and the stress F2 given to the outer annular portion 3 by the second connecting portion 5 act in directions away from each other, the stresses F1 and F2 are applied. Effectively dispersed. As a result, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, it is possible to effectively suppress the action of local stress on the outer annular portion 3.

The tire 1 according to the present embodiment is a tire 1 in which the mounting direction to the vehicle and the rotation direction D10 are not specified. Therefore, FIG. 8 shows a case where the rotation direction D10 of the tire 1 is the second circumferential direction side D3b.

In the rotation direction D10 of FIG. 8, similarly to FIG. 7, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, the side D5 on which the stress F1 applied by the first connecting portion 4 to the outer annular portion 3 acts is , It is opposite to the working side D4 of the stress F2 applied to the outer annular portion 3 by the second connecting portion 5. Therefore, the stresses F1 and F2 can be dispersed.

In the rotation direction D10 of FIG. 8, the thickness directions D6 of the connecting portions 4 and 5 are directed toward the outside of the tire width direction D1 as they go in the rotation direction D10. As a result, in FIG. 8, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, the stresses F1 and F2 given to the outer annular portion 3 by the connecting portions 4 and 5 are on the opposite side to the rotational direction D10. Therefore, it works toward the inside of the tire width direction D1.

Therefore, the stress F1 given to the outer annular portion 3 by the first connecting portion 4 and the stress F2 given to the outer annular portion 3 by the second connecting portion 5 work in directions closer to each other, and thus are compared with the case of FIG. Therefore, the stresses F1 and F2 cannot be effectively dispersed. As a result, although not particularly limited, in the tire 1 according to the present embodiment, as shown in FIG. 7, the thickness direction D6 of the connecting portions 4 and 5 goes inside the tire width direction D1 as it goes in the rotation direction D10. It is preferable that the rotation direction D10 is set so as to go toward.

Further, as shown in FIG. 9, the first outer joint portion 4d overlaps with the second inner joint portion 5c in the tire radial direction D2, and the second outer joint portion 5d overlaps with the first inner joint portion 4c. , Tires overlap in the radial direction D2. In FIG. 9, the first and second inner joints 4c and 5c are shown one by one, and the positions of the inner joints 4c and 5c in the tire radial direction D2 are shown by broken lines. ..

As described above, the outer joint portions 4d and 5d of the connecting portions 4 and 5 overlap with the inner joint portions 5c and 4c of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire radial direction D2. There is. As a result, the rigidity of the end regions 1d and 1d in the tire width direction D1 of the tire 1 can be increased. Therefore, for example, the braking performance of the tire 1 can be improved. Further, for example, it is possible to improve the steering stability performance of the tire 1 when turning.

The tire 1 is a central region arranged between a pair of end regions (also referred to as “shoulder regions”) 1d and 1d arranged outside the tire width direction D1 and a pair of end regions 1d and 1d. It has 1e (also called "center area"). The pair of end regions 1d and 1d and the central region 1e are regions that are divided so that the dimensions in the tire width direction D1 are even.

From the above, in the non-pneumatic tire 1 according to the present embodiment, the inner annular portion 2 and the outer annular portion 3 arranged concentrically, the inner annular portion 2 and the outer annular portion 3 are connected, and the tire circumferential direction. A plurality of connecting portions 4 and 5 arranged in parallel with D3 are provided, and the plurality of connecting portions 4 and 5 are provided from one side D1a of the inner annular portion 2 in the tire width direction to the other in the tire width direction of the outer annular portion 3. A first connecting portion 4 extending toward the side D1b and a second connecting portion 5 extending from the other side D1b of the inner annular portion 2 in the tire width direction toward the one side D1a of the outer annular portion 3 in the tire width direction. The connecting portions 4 and 5 are provided with outer joint portions 4d and 5d to be joined to the outer annular portion 3, and the longitudinal direction D8 of the outer joint portions 4d and 5d intersects the tire width direction D1.

According to such a configuration, since the longitudinal directions D8 of the outer joints 4d and 5d intersect with the tire width direction D1, the lengths of the outer joints 4d and 5d in the tire circumferential direction D3 become longer. .. As a result, it is possible to prevent the outer joint portions 4d and 5d of the adjacent connecting portions 4 and 5 from being separated from each other in the tire circumferential direction D3.

Further, in the non-pneumatic tire 1 according to the present embodiment, the outer joint portions 4d and 5d of the connecting portions 4 and 5 are the outer joint portions of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5. The configuration is such that 5d and 4d overlap with each other in the tire width direction D1.

According to such a configuration, the outer joint portions 4d and 5d of the adjacent connecting portions 4 and 5 are continuous in the tire circumferential direction D3. As a result, it is possible to suppress the occurrence of a local rigidity difference in the outer annular portion 3 in the tire circumferential direction D3.

Further, in the non-pneumatic tire 1 according to the present embodiment, the outer joint portion 4d of the first connecting portion 4 overlaps with the outer joint portion 5d of the second connecting portion 5 in the tire circumferential direction D3. It is a configuration.

According to such a configuration, the outer joint portion 4d of the first connecting portion 4 and the outer joint portion 5d of the second connecting portion 5 are continuous in the tire width direction D1. As a result, it is possible to suppress the occurrence of a local rigidity difference in the outer annular portion 3 in the tire width direction D1.

Further, in the non-pneumatic tire 1 according to the present embodiment, the side D4 in which the longitudinal direction D8 of the outer joint portion 4d of the first connecting portion 4 is inclined with respect to the tire width direction D1 is the second connecting portion 5. The longitudinal direction D8 of the outer joint portion 5d is opposite to the side D5 that is inclined with respect to the tire width direction D1.

According to such a configuration, the side D4 in which the longitudinal direction D8 of the outer joint portion 4d of the first connecting portion 4 is inclined is opposite to the side D5 in which the longitudinal direction D8 of the outer joint portion 5d of the second connecting portion 5 is inclined. It has become. As a result, the stress applied by the connecting portions 4 and 5 to the outer annular portion 3 can be dispersed.

Further, in the non-pneumatic tire 1 according to the present embodiment, the connecting portions 4 and 5 are formed in a plate shape, and the thickness direction D6 of the first connecting portion 4 is inclined with respect to the tire width direction D1. Is a configuration in which the thickness direction D6 of the second connecting portion 5 is opposite to the side D4 that is inclined with respect to the tire width direction D1.

According to such a configuration, when the connecting portions 4 and 5 are elastically deformed in the thickness direction D6, a large stress acts on the outer annular portion 3 in the thickness direction D6 of the connecting portions 4 and 5, whereas the first The side D5 on which the thickness direction D6 of the 1 connecting portion 4 is inclined is opposite to the side D4 on which the thickness direction D6 of the second connecting portion 5 is inclined. As a result, the working side D5 of the stress F1 given to the outer annular portion 3 by the first connecting portion 4 is opposite to the working side D4 of the stress F2 given to the outer annular portion 3 by the second connecting portion 5. Therefore, the stresses F1 and F2 acting on the outer annular portion 3 can be dispersed.

Further, in the non-pneumatic tire 1 according to the present embodiment, the first connecting portion 4 and the second connecting portion 5 are alternately arranged in the tire circumferential direction D3, and the connecting portions 4 and 5 are said. The inner joint portions 4c and 5c to be joined to the inner annular portion 2 are provided, and the outer joint portions 4d and 5d of the connecting portions 4 and 5 are the inner side of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5. The joints 4c and 5c overlap each other in the tire radial direction D2.

According to such a configuration, the outer joints 4d and 5d of the connecting portions 4 and 5 are the inner joints 5c and 4c of the connecting portions 5 and 4 adjacent to the connecting portions 5 and 4, and the tire radial direction D2 is viewed. It overlaps with. As a result, the rigidity of the end regions 1d and 1d in the tire width direction D1 of the tire 1 can be increased.

The non-pneumatic tire 1 is not limited to the configuration of the above-described embodiment, and is not limited to the above-mentioned action and effect. Further, it goes without saying that the non-pneumatic tire 1 can be modified in various ways without departing from the gist of the present invention. For example, it goes without saying that one or a plurality of configurations and methods according to the following various modification examples may be arbitrarily selected and adopted for the configurations and methods according to the above-described embodiment.

(1) In the non-pneumatic tire 1 according to the above embodiment, on the side D5 where the thickness direction D6 of the first connecting portion 4 is inclined with respect to the tire width direction D1, the thickness direction D6 of the second connecting portion 5 is the tire width. The configuration is opposite to the side D4 that is inclined with respect to the direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration. For example, as shown in FIGS. 10 to 13, the side D5 in which the thickness direction D6 of the first connecting portion 4 is inclined is the same as the side D5 in which the thickness direction D6 of the second connecting portion 5 is inclined. But it may be.

(2) Further, in the non-pneumatic tire 1 according to the above embodiment, the side D4 in which the longitudinal direction D8 of the first outer joint portion 4d is inclined with respect to the tire width direction D1 is the longitudinal direction of the second outer joint portion 5d. The configuration is such that D8 is opposite to the side D5 that is inclined with respect to the tire width direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration. For example, as shown in FIGS. 10 to 13, the side D4 in which the longitudinal direction D8 of the first outer joint portion 4d is inclined is the same as the side D4 in which the longitudinal direction D8 of the second outer joint portion 5d is inclined. It may be configured as.

The tire 1 according to FIGS. 10 to 13 will be described below.

As shown in FIGS. 10 to 13, the first connecting portion 4 and the second connecting portion 5 are alternately arranged in the tire circumferential direction D3. The outer joint portions 4d and 5d of the connecting portions 4 and 5 overlap with the outer joint portions 5d and 4d of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire width direction D1. For example, the first outer joint portion 4d overlaps the second outer joint portion 5d adjacent to the first circumferential direction side D3a in the tire width direction D1, and the second outer joint portion 5d is in the second circumferential direction. It overlaps with the first outer joint 4d adjacent to the side D3b in the tire width direction D1.

Further, the first outer joint portion 4d overlaps with the second outer joint portion 5d in the tire circumferential direction D3. Although not particularly limited, in FIGS. 10 to 13, the intersection angle θ1 between the longitudinal direction D8 of the first outer joint portion 4d and the tire width direction D1 is the longitudinal direction D8 of the second outer joint portion 5d and the tire width. It is the same as the intersection angle θ2 with the direction D1.

Further, the side where the thickness direction D6 of the first connecting portion 4 is inclined is the second inclined side D5, and the side where the thickness direction D6 of the second connecting portion 5 is inclined is also the second inclined side D5. The side D5 in which the thickness direction D6 of the connecting portions 4 and 5 is inclined with respect to the tire width direction D1 is the side D5 in which the lateral joint portions 4d and 5d are inclined with respect to the tire width direction D1. It is the same.

Further, the side where the longitudinal direction D8 of the first outer joint portion 4d is inclined is the first inclined side D4, and the side where the longitudinal direction D8 of the second outer joint portion 5d is inclined is also the first inclined side D4. The side D4 in which the width direction D7 of the connecting portions 4 and 5 is inclined with respect to the tire width direction D1 is the same as the side D4 in which the longitudinal direction D8 of the outer joint portions 4d and 5d is inclined with respect to the tire width direction D1. Is.

(3) Further, in the non-pneumatic tire 1 according to the above embodiment, the intersection angle θ1 between the longitudinal direction D8 of the first outer joint portion 4d and the tire width direction D1 is the longitudinal direction D8 of the second outer joint portion 5d. The configuration is the same as the intersection angle θ2 with the tire width direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration.

For example, as shown in FIG. 14, the intersection angle θ1 between the longitudinal direction D8 of the first outer joint portion 4d and the tire width direction D1 is the intersection angle between the longitudinal direction D8 of the second outer joint portion 5d and the tire width direction D1. The configuration may be different from θ2. In FIG. 14, the intersection angle θ2 between the longitudinal direction D8 of the second outer joint portion 5d and the tire width direction D1 is from the intersection angle θ1 between the longitudinal direction D8 of the first outer joint portion 4d and the tire width direction D1. Is getting bigger.

Although not particularly limited, in the tire 1 according to FIG. 14, the tire 1 is attached to the vehicle so that the first width direction side D1a is on the outside when the vehicle is mounted and the second width direction side D1b is on the inside when the vehicle is mounted. It is preferable to be attached. That is, it is preferable that the tire 1 is mounted on the vehicle so that the second outer joint portion 5d is on the outside when mounted on the vehicle and the first outer joint portion 4d is on the inside when mounted on the vehicle.

In this way, when the first width direction side D1a is on the outside when mounted on the vehicle, the intersection angle θ2 between the longitudinal direction D8 of the first outer joint portion 5d and the tire width direction D1 is large, so that when mounted on the vehicle. The length of the outer second outer joint portion 5d in the tire circumferential direction D3 becomes even longer. Thereby, for example, the steering stability performance of the tire 1 when turning can be improved.

(4) Further, in the non-pneumatic tire 1 according to the above embodiment, the first connecting portion 4 and the second connecting portion 5 are alternately arranged in the tire circumferential direction D3. However, the non-pneumatic tire 1 is not limited to such a configuration. For example, as shown in FIG. 15, the plurality of second connecting portions 5 and 5 may be continuously arranged in parallel in the tire circumferential direction D3.

In the tire 1 according to FIG. 15, the number of the second connecting portions 5 is larger than the number of the first connecting portions 4. Although not particularly limited, in the tire 1 according to FIG. 15, the tire 1 is attached to the vehicle so that the first width direction side D1a is on the outside when the vehicle is mounted and the second width direction side D1b is on the inside when the vehicle is mounted. It is preferable to be attached. That is, it is preferable that the tire 1 is mounted on the vehicle so that the second outer joint portion 5d is on the outside when mounted on the vehicle and the first outer joint portion 4d is on the inside when mounted on the vehicle.

As described above, when the first width direction side D1a is outside when mounted on the vehicle, the number of the second connecting portions 5 is large, so that the tire circumferential direction D3 of the second outer joint portion 5d which is outside when mounted on the vehicle The total length will be longer. Thereby, for example, the steering stability performance of the tire 1 when turning can be improved. The plurality of first connecting portions 4 are also continuously arranged in parallel in the tire circumferential direction D3, so that the number of the first connecting portions 4 is the same as the number of the second connecting portions 5. But it may be.

(5) Further, the non-pneumatic tire 1 according to the above embodiment is a tire 1 in which the mounting direction to the vehicle and the rotation direction D10 are not specified. However, the non-pneumatic tire 1 is not limited to such a configuration.

For example, the non-pneumatic tire 1 may be a tire 1 whose mounting direction on a vehicle is designated, or may be, for example, a tire 1 whose rotation direction D10 is designated. The tire 1 may be configured so that both the mounting direction on the vehicle and the rotation direction D10 are specified. In such a configuration, the tire 1 is provided with, for example, a side surface portion of the support structure 1a a display portion that displays at least one of the vehicle mounting direction and the rotation direction D10.

For example, the tire 1 according to the above embodiment is a tire 1 in which the rotation direction D10 is designated so that the thickness direction D6 of the connecting portions 4 and 5 goes inward of the tire width direction D1 as the thickness direction D6 goes to the rotation direction D10. , May be the configuration. Further, for example, the tire 1 according to FIGS. 14 and 15 may be configured such that the tire 1 whose mounting direction to the vehicle is specified so that the first width direction side D1a is on the outside when mounted on the vehicle. ..

(6) Further, in the non-pneumatic tire 1 according to the above embodiment, the longitudinal direction D8 of the outer joint portions 4d and 5d is inclined with respect to the tire width direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration. For example, the longitudinal direction D8 of the outer joint portions 4d and 5d may be orthogonal to the tire width direction D1.

(7) Further, in the non-pneumatic tire 1 according to the above embodiment, the longitudinal directions D8 of all the outer joint portions 4d and 5d intersect with the tire width direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration.

For example, the outer joints 4d and 5d at which the longitudinal direction D8 intersects the tire width direction D1 may be one. Further, for example, it is preferable that the outer joint portions 4d and 5d where the longitudinal direction D8 intersects the tire width direction D1 are 50% or more of all the outer joint portions 4d and 5d, and 75. The configuration of% or more is more preferable, and the configuration of 100% or more is very preferable.

(8) Further, in the non-pneumatic tire 1 according to the above embodiment, the outer joint portions 4d and 5d of the connecting portions 4 and 5 are the outer joint portions of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5. The configuration is such that 5d and 4d overlap with each other in the tire width direction D1. However, the non-pneumatic tire 1 is not limited to such a configuration, although such a configuration is preferable. For example, the outer joints 4d and 5d of the connecting portions 4 and 5 are separated from the outer joints 5d and 4d of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire width direction D1. It may be configured as.

(9) Further, in the non-pneumatic tire 1 according to the above embodiment, the outer joint portion 4d of the first connecting portion 4 overlaps with the outer joint portion 5d of the second connecting portion 5 in the tire circumferential direction D3. It is a composition. However, the non-pneumatic tire 1 is not limited to such a configuration, although such a configuration is preferable. For example, the outer joint portion 4d of the first connecting portion 4 may be separated from the outer joint portion 5d of the second connecting portion 5 in the tire circumferential direction D3.

(10) Further, in the non-pneumatic tire 1 according to the above embodiment, the connecting portions 4 and 5 are formed in a plate shape. However, the non-pneumatic tire 1 is not limited to such a configuration. For example, the connecting portions 4 and 5 may be formed in a polygonal columnar shape, may be formed in a columnar shape, or may be formed in a twisted plate shape. But it may be.

(11) Further, in the non-pneumatic tire 1 according to the above embodiment, the outer joint portions 4d and 5d of the connecting portions 4 and 5 are the inner joint portions of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5. It is configured to overlap with 4c and 5c in the tire radial direction D2. However, the non-pneumatic tire 1 is not limited to such a configuration, although such a configuration is preferable.

For example, the outer joints 4d and 5d of the connecting portions 4 and 5 are separated from the inner joints 4c and 5c of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire radial direction D2. It may be configured as. In the configuration, for example, the connecting portions 4 and 5 may be separated from the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire radial direction D2. The central portion of the connecting portions 4 and 5 in the tire radial direction D2 overlaps the central portion of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire radial direction D2 in the tire radial direction D2. It may be.

(12) Further, in the non-pneumatic tire 1 according to the above embodiment, the end portion of the connecting portions 4 and 5 in the tire radial direction D2 is the tire diameter of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5. The end portion in the direction D2 and the end portion in the tire width direction D1 are overlapped with each other. However, the non-pneumatic tire 1 is not limited to such a configuration.

For example, in the tire width direction D1 view, the connecting portions 4 and 5 may be separated from the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire circumferential direction D3. Further, for example, the central portion of the connecting portions 4 and 5 in the tire radial direction D2 is the central portion of the connecting portions 5 and 4 adjacent to the connecting portions 4 and 5 in the tire radial direction D2 and the central portion in the tire width direction D1. It may be configured to overlap.

1 ... Non-pneumatic tire, 1a ... Support structure, 1b ... Reinforcing layer, 1c ... Tread portion, 1d ... End region, 1e ... Central region, 2 ... Inner annular portion, 3 ... Outer annular portion, 4 ... First connection Part, 4a ... Flat part, 4b ... Curved part, 4c ... First inner joint part, 4d ... First outer joint part, 5 ... Second connecting part, 5a ... Flat part, 5b ... Curved part, 5c ... Second inner Joint portion, 5d ... 2nd outer joint portion, D1 ... tire width direction, D1a ... first width direction side, D1b ... second width direction side, D2 ... tire radial direction, D3 ... tire circumferential direction, D3a ... first circumference Directional side, D3b ... 2nd circumferential direction side, D4 ... 1st inclined side, D5 ... 2nd inclined side, D6 ... thickness direction, D7 ... width direction, D8 ... longitudinal direction, D9 ... short direction, D10 ... rotation direction , S1 ... Tire equatorial plane

Claims (6)

The inner and outer annular parts arranged concentrically,
A plurality of connecting portions that connect the inner annular portion and the outer annular portion and are arranged in parallel in the tire circumferential direction are provided.
The plurality of connecting portions are the first connecting portion extending from one side of the inner annular portion in the tire width direction toward the other side of the outer annular portion in the tire width direction, and the inner annular portion from the other side in the tire width direction. A second connecting portion extending toward one side in the tire width direction of the outer annular portion is provided.
The connecting portion includes an outer joining portion that joins with the outer annular portion.
A non-pneumatic tire in which the longitudinal direction of the outer joint intersects the tire width direction. The non-pneumatic tire according to claim 1, wherein the outer joint portion of the connecting portion overlaps the outer joint portion of the connecting portion adjacent to the connecting portion in the tire width direction. The non-pneumatic tire according to claim 1 or 2, wherein the outer joint portion of the first connecting portion overlaps the outer joint portion of the second connecting portion in a tire circumferential direction. The side where the longitudinal direction of the outer joint portion of the first connecting portion is inclined with respect to the tire width direction is the side where the longitudinal direction of the outer joint portion of the second connecting portion is inclined with respect to the tire width direction. The non-pneumatic tire according to any one of claims 1 to 3, which is the opposite. The connecting portion is formed in a plate shape.
The fourth aspect of claim 4, wherein the side where the thickness direction of the first connecting portion is inclined with respect to the tire width direction is opposite to the side where the thickness direction of the second connecting portion is inclined with respect to the tire width direction. Non-pneumatic tires. The first connecting portion and the second connecting portion are alternately arranged in the tire circumferential direction.
The connecting portion includes an inner joining portion that joins with the inner annular portion.
The non-pneumatic tire according to claim 4 or 5, wherein the outer joint portion of the connecting portion overlaps the inner joint portion of the connecting portion adjacent to the connecting portion in the tire radial direction.

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