JP6134204B2 - 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.

In a conventional pneumatic tire that is used while being filled with pressurized air, the occurrence of puncture is an unavoidable problem in structure.
In order to solve such a problem, in recent years, for example, as shown in Patent Document 1 below, an attachment body attached to an axle, a ring-like body surrounding the attachment body from the outside in the tire radial direction, and these There has been proposed a non-pneumatic tire including a plurality of connecting members disposed along the tire circumferential direction between an attachment body and a ring-shaped body.

JP 2011-156905 A

  However, in the conventional non-pneumatic tire, it is necessary to connect both ends of each of the plurality of connecting members to the ring-shaped body and the attachment body separately in the assembly thereof, which not only takes manufacturing time but also reduces the weight. It was also a hindrance.

  The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a non-pneumatic tire that can be easily assembled and can also be reduced in weight.

In order to solve the above-described problems and achieve such an object, a non-pneumatic tire of the present invention includes an attachment body attached to an axle, an inner cylinder body mounted on the attachment body, and the inner cylinder body A ring member having an outer cylinder that surrounds the outer side of the tire in the radial direction of the tire and a plurality of ring members disposed along the tire circumferential direction between the inner cylinder and the outer cylinder, A connecting member for relatively elastically displacing the connecting member, and the connecting member is disposed between one end connected to the outer cylinder and the other end connected to the inner cylinder. A plurality of curved portions that are curved in the tire circumferential direction are formed in a middle portion of the tire along the direction in which the connecting member extends in a tire side view when the tire is viewed from the tire width direction. The bending directions of the bending portions adjacent to each other are mutually The plurality of bending portions are a first bending portion that is curved so as to protrude toward one of the tire circumferential direction and the other side, and the first bending portion and the connecting member. A second bending portion located between the one end portion and curved so as to protrude toward the opposite side of the bending direction of the first bending portion in the tire circumferential direction; the first bending portion; and the connecting member A third bending portion that is positioned between the other end portion of the first bending portion and is curved toward the opposite side of the bending direction of the first bending portion in the tire circumferential direction. The first bending portion has a larger radius of curvature in the tire side view than the second bending portion and the third bending portion, and the connecting member is in the tire radial direction in the tire side view. The ring formed symmetrically with respect to a center line extending along the ring A material and a plurality of the connecting members are integrally formed, and each of the connecting members is connected to the outer cylinder, and the other end is connected to the inner cylinder. A plurality of first elastic connection plates arranged at one tire width direction position along the tire circumferential direction, and the second elastic connection plate includes the first elastic connection plate; A plurality of tire width direction positions different from the tire width direction position are arranged along the tire circumferential direction, and the plurality of curved portions are formed in each of the first elastic connection plate and the second elastic connection plate, The plurality of curved portions formed on the first elastic coupling plate are curved so as to project toward the other side in the tire circumferential direction, the first curved portion, and the first elastic portion. A tie positioned between the one end of the connecting plate and Tire circumferential direction located between the second curved portion curved so as to project toward one side in the circumferential direction, the first curved portion, and the other end portion of the first elastic connecting plate The third curved portion curved so as to project toward one side of the tire, and the plurality of curved portions formed on the second elastic connecting plate are directed toward one side in the tire circumferential direction. The first curved portion curved so as to project, and the first curved portion is positioned between the first curved portion and the one end of the second elastic connecting plate, and projects toward the other side in the tire circumferential direction. The second curved portion that is curved in a curved manner, and the first curved portion and the other end of the second elastic connecting plate are located so as to project toward the other side in the tire circumferential direction. And a third bending portion .

In the non-pneumatic tire, the one end portion of the first elastic connection plate is located on one side in the tire circumferential direction from the other end portion, and the second elastic connection plate includes the one end portion, the other end portion located on the other side in the tire circumferential direction from the respective end portions of the first elastic coupling plate in one of said connecting member and said second elastic connecting plate, the outer tube On the inner peripheral surface of the body, the positions in the tire width direction may be different from each other and connected to the same position in the tire circumferential direction.
In the non-pneumatic tire, the ring member is divided into a one-side divided ring member located on one side in the tire width direction and a second-side divided ring member located on the other side in the tire width direction. It may be.

  According to this invention, it can be easily assembled and the weight can be reduced.

In one Embodiment which concerns on this invention, it is the schematic perspective view which decomposed | disassembled some non-pneumatic tires. It is the tire side view which looked at the non-pneumatic tire shown in FIG. 1 from the one side of the tire width direction. The side view which looked at the 1st division case body from which the one side division ring member and the 1st elastic connection board were formed in one in the tire width direction among the non-pneumatic tires shown in Drawing 1, or the other side It is the side view which looked at the 2nd division case body in which the division ring member and the 2nd elastic connection board were formed integrally from the other side of the tire width direction. It is an enlarged view which shows the principal part of FIG.

Hereinafter, an embodiment of a non-pneumatic tire according to the present invention will be described with reference to FIGS. 1 to 4.
The non-pneumatic tire 1 includes an attachment body 11 attached to an axle (not shown), an inner cylinder body 12 externally mounted on the attachment body 11, and an outer cylinder body 13 surrounding the inner cylinder body 12 from the outer side in the tire radial direction. A plurality of ring members 14 provided between the inner cylindrical body 12 and the outer cylindrical body 13 are disposed along the tire circumferential direction, and the two cylindrical bodies 12 and 13 are relatively elastically connected to each other. And a tread member 16 disposed on the outer peripheral surface side of the outer cylindrical body 13 over the entire circumference thereof.

  Here, the attachment body 11, the inner cylinder body 12, the outer cylinder body 13, and the tread member 16 are each arranged coaxially with the common shaft. Hereinafter, the common axis is referred to as an axis O, a direction along the axis O is referred to as a tire width direction H, a direction orthogonal to the axis O is referred to as a tire radial direction, and a direction around the axis O is a tire circumference. It is called direction. In addition, the attachment body 11, the inner cylinder body 12, the outer cylinder body 13, and the tread member 16 are disposed such that the center portions in the tire width direction H are aligned with each other.

  Of the ring member 14, the outer cylinder 13 is larger in size in the tire width direction H than the inner cylinder 12, that is, the width is larger. A plurality of protrusions 12a that protrude toward the inner side in the tire radial direction and extend over the entire length in the tire width direction H are disposed on the inner peripheral surface of the inner cylindrical body 12 at intervals in the tire circumferential direction. ing.

As shown in FIGS. 1 and 2, the attachment body 11 includes a mounting cylinder portion 17 to which the front end portion of the axle is mounted, an outer ring portion 18 that surrounds the mounting cylinder portion 17 from the outside in the tire radial direction, And a plurality of ribs 19 that connect the mounting cylinder portion 17 and the outer ring portion 18.
The mounting cylinder portion 17, the outer ring portion 18, and the rib 19 are integrally formed of a metal material such as an aluminum alloy. The mounting cylinder portion 17 and the outer ring portion 18 are each formed in a cylindrical shape and arranged coaxially with the axis O. The plurality of ribs 19 are arranged point-symmetrically with respect to the axis O.

A plurality of key groove portions 18a that are recessed toward the inside in the tire radial direction and that extend in the tire width direction H are formed on the outer peripheral surface of the outer ring portion 18 at intervals in the tire circumferential direction. The key groove portion 18 a is opened only on one side of both ends in the tire width direction H on the outer peripheral surface of the outer ring portion 18, and the other side is closed. The protrusions 12a of the inner cylinder 12 of the ring member 14 are fitted into these key groove portions 18a.
Of the wall surfaces defining the key groove portion 18a, the pair of side wall surfaces and the bottom wall surface facing each other in the tire circumferential direction form a right angle. In addition, a pair of side wall surfaces rising from the inner peripheral surface of the inner cylindrical body 12 and a top wall surface facing the inner side in the tire radial direction out of the outer surface of the protruding portion 12a form a right angle. The sizes of the protrusion 12a and the key groove 18a in the tire circumferential direction are equal to each other.

  Here, at the edge of one side in the tire width direction H in the outer ring portion 18, a recess 18 b that is recessed toward the other side in the tire width direction H and into which the plate material 28 is fitted is located at a position corresponding to the key groove portion 18 a. Is formed. A through hole is formed in the plate member 28, and a female screw communicating with the through hole of the plate member 28 fitted in the recess 18b on a wall surface facing the one side in the tire width direction H among the wall surfaces defining the recess 18b. The part is formed. A plurality of these internal thread portions and through holes are formed at intervals in the tire circumferential direction.

Then, the ring member 14 is bolted through the through hole of the plate member 28 fitted in the recess 18b in a state where the inner cylinder 12 is fitted on the attachment body 11 and the protrusion 12a is fitted in the key groove 18a. Is fixed to the attachment body 11 by screwing into the female thread portion. In this state, the protruding portion 12a is formed in the tire width direction H by the plate member 28 and the other wall surface facing the one side located at the other end in the tire width direction H among the wall surfaces defining the recess 18b. It is sandwiched.
In the outer ring portion 18, a plurality of hollow holes penetrating in the tire radial direction are arranged at intervals in the tire width direction H in a portion located between the key groove portions 18 a adjacent in the tire circumferential direction. A plurality of hole rows 18c are formed at intervals in the tire circumferential direction. The rib 19 is also formed with a hole 19a penetrating in the tire width direction H.

  The tread member 16 is formed in a cylindrical shape and integrally covers the outer peripheral surface side of the outer cylindrical portion 13 of the ring member 14 over the entire area. The tread member 16 is made of, for example, vulcanized rubber obtained by vulcanizing natural rubber and / or a rubber composition, or a thermoplastic material. Examples of the thermoplastic material include a thermoplastic elastomer or a thermoplastic resin. Examples of the thermoplastic elastomer include amide-based thermoplastic elastomer (TPA), ester-based thermoplastic elastomer (TPC), olefin-based thermoplastic elastomer (TPO), styrene-based thermoplastic elastomer (TPS), and urethane as defined in JIS K6418. Examples thereof include a thermoplastic elastomer (TPU), a crosslinked thermoplastic rubber (TPV), and other thermoplastic elastomers (TPZ). Examples of the thermoplastic resin include urethane resin, olefin resin, vinyl chloride resin, and polyamide resin. From the viewpoint of wear resistance, it is preferable to form the tread member 16 from vulcanized rubber.

The connecting member 15 includes a first elastic connecting plate 21 and a second elastic connecting plate 22 that connect the inner cylinder 12 and the outer cylinder 13 in the ring member 14 to each other.
The connecting member 15 includes a plurality of first elastic connecting plates 21 arranged along the tire circumferential direction at a position in one tire width direction H, and the second elastic connecting plate 22 is a position in the one tire width direction H. A plurality (60 in the illustrated example) are provided along the tire circumferential direction so that a plurality of different tire width directions H are arranged along the tire circumferential direction.
That is, the plurality of first elastic connecting plates 21 are arranged at the same position in the tire width direction H along the tire circumferential direction, and the plurality of second elastic connecting plates 22 are separated from the first elastic connecting plate 21. A plurality of tires are arranged along the tire circumferential direction at the same position in the tire width direction H that is separated in the tire width direction H.

Note that the plurality of connecting members 15 are separately disposed between the inner cylinder 12 and the outer cylinder 13 in the ring member 14 at positions that are point-symmetric with respect to the axis O. All the connecting members 15 have the same shape and size. Furthermore, the width of the connecting member 15 is smaller than the width of the outer cylinder 13.
The first elastic coupling plates 21 adjacent in the tire circumferential direction are not in contact with each other, and the second elastic coupling plates 22 adjacent in the tire circumferential direction are also in non-contact with each other. Further, the first elastic connecting plate 21 and the second elastic connecting plate 22 adjacent in the tire width direction H are also not in contact with each other.
In addition, the width | variety of each of the 1st elastic connection board 21 and the 2nd elastic connection board 22 is mutually equal. The thicknesses of the first elastic connecting plate 21 and the second elastic connecting plate 22 are also equal to each other.

Here, in the first elastic connecting plate 21, one end 21a connected to the outer cylinder 13 is located on one side in the tire circumferential direction from the other end 21b connected to the inner cylinder 12, Of the two elastic connecting plates 22, one end 22 a connected to the outer cylinder 13 is located on the other side in the tire circumferential direction with respect to the other end 22 b connected to the inner cylinder 12.
Further, the respective one end portions 21 a and 22 a of the first elastic connecting plate 21 and the second elastic connecting plate 22 in one connecting member 15 are made to have different positions in the tire width direction H on the inner peripheral surface of the outer cylindrical body 13. And are connected to the same position in the tire circumferential direction.

  In the illustrated example, in each of the first elastic connecting plate 21 and the second elastic connecting plate 22, intermediate portions 21c and 22c positioned between the one end portions 21a and 22a and the other end portions 21b and 22b are arranged in the tire circumferential direction. A plurality of curved portions 21d to 21f and 22d to 22f that are curved are formed along the direction in which the connecting plates 21 and 22 extend in a side view of the tire 1 when the tire 1 is viewed from the tire width direction H. In each of the connecting plates 21 and 22, among the plurality of bending portions 21d to 21f and 22d to 22f, the bending directions of the bending portions 21d to 21f and 22d to 22f adjacent to each other in the extending direction are opposite to each other. It has become.

The plurality of curved portions 21d to 21f formed on the first elastic connecting plate 21 are a first curved portion 21d curved so as to protrude toward the other side in the tire circumferential direction, a first curved portion 21d, and one end portion. 21a and a second curved portion 21e curved so as to project toward one side in the tire circumferential direction, and located between the first curved portion 21d and the other end 21b and the tire circumference And a third bending portion 21f that is curved so as to project toward one side of the direction.
The plurality of curved portions 22d to 22f formed on the second elastic connecting plate 22 are a first curved portion 22d curved so as to project toward one side in the tire circumferential direction, a first curved portion 22d, and one end portion. 22a and the second curved portion 22e curved so as to protrude toward the other side in the tire circumferential direction, and located between the first curved portion 22d and the other end 22b and the tire circumference And a third curved portion 22f curved so as to project toward the other side of the direction.
In the illustrated example, the first bending portions 21d and 22d have a larger radius of curvature in the tire side view than the second bending portions 21e and 22e and the third bending portions 21f and 22f. The first curved portions 21d and 22d are disposed at the center of the first elastic connecting plate 21 and the second elastic connecting plate 22 in the extending direction.

  Further, the lengths of the two elastic connecting plates 21 and 22 are equal to each other, and the other end portions 21b and 22b of the two elastic connecting plates 21 and 22 are, as shown in FIG. Thus, the same angle (for example, 20 ° or more) on one side and the other side in the tire circumferential direction around the axis O from the position facing the one end portions 21a, 22a in the tire radial direction on the outer peripheral surface of the inner cylindrical body 12 135 degrees or less), and connected to each position separated by one. Further, the first bending portions 21d and 22d, the second bending portions 21e and 22e, and the third bending portions 21f and 22f of the first elastic connecting plate 21 and the second elastic connecting plate 22 are mutually in the tire circumferential direction. The opposite direction is the same and the size is the same.

Thereby, the shape of each connecting member 15 in the side view of the tire extends along the tire radial direction and passes through the one end portions 21a and 22a of both connecting plates 21 and 22, as shown in FIG. The line is symmetrical with respect to the virtual line L.
Further, in each of the elastic connecting plates 21 and 22, the one end side portion extending from the central portion in the extending direction to the one end portions 21a and 22a is more than the other end side portion extending from the central portion to the other end portions 21b and 22b. The thickness is increased. Thereby, while suppressing the increase in the weight of the connecting member 15 and ensuring the flexibility of the connecting member 15, the strength of the one end side portion where a large load is easily applied to the first and second elastic connecting plates 21 and 22 is increased. Can be increased. In addition, these one end side parts and other end side parts are smoothly connected without a level | step difference.

In the present embodiment, the ring member 14 and the plurality of connecting members 15 are integrally formed.
Further, in the present embodiment, as shown in FIG. 1, the ring member 14 is divided into one side split ring member 23 located on one side in the tire width direction H and the other side division located on the other side in the tire width direction H. It is divided into a ring member 24. In the illustrated example, the ring member 14 is divided at the center in the tire width direction H.

The one-side split ring member 23 is formed integrally with the first elastic connecting plate 21, and the other-side split ring member 24 is formed integrally with the second elastic connecting plate 22.
Further, in the present embodiment, the one-side split ring member 23 and the first elastic connecting plate 21, and the other-side split ring member 24 and the second elastic connecting plate 22 are integrally formed by casting or injection molding, respectively.
Hereinafter, a structure in which the one-side split ring member 23 and the first elastic connecting plate 21 are integrally formed is referred to as a first split case body 31, and the other-side split ring member 24 and the second elastic connecting plate 22 are integrally formed. This is referred to as a second divided case body 32.

Here, the injection molding may be a general method in which the entire first and second divided case bodies 31 and 32 are simultaneously molded separately, or the first and second divided case bodies 31 and 32. In each case, one of the one-side and other-side split ring members 23 and 24 and the first and second elastic connecting plates 21 and 22 may be insert molding in which one is used as an insert and the other is injection-molded, or so-called two colors. Molding or the like may be used.
In each of the first and second split case bodies 31 and 32, the one side and the other side split ring members 23 and 24 and the first and second elastic connecting plates 21 and 22 are formed of different materials. Alternatively, the same material may be used. Examples of this material include a metal material and a resin material, but a resin material, particularly a thermoplastic resin is preferable from the viewpoint of weight reduction.
When the entire first and second divided case bodies 31 and 32 are simultaneously injection-molded separately, a plurality of protrusions 12a formed on the inner cylindrical body 12 may be used as the gate portion.

  In each of the first and second divided case bodies 31 and 32, the center portion of the first and second elastic connecting plates 21 and 22 in the tire width direction H, the center portion of the outer cylinder 13 in the tire width direction H, and the inner The central portion of the cylindrical body 12 in the tire width direction H coincides with each other, the inner cylindrical body 12 is smaller in width than the outer cylindrical body 13, and each of the first elastic connecting plate 21 and the second elastic connecting plate 22 is provided. It is equivalent to the width.

And the edges in the tire width direction H of the outer cylindrical body 13 of the one-side split ring member 23 and the outer cylindrical body 13 of the other-side split ring member 24 are connected by, for example, welding, fusion, or adhesion. Yes. Of these, in the case of welding, for example, hot plate welding or the like may be employed.
Further, the edges in the tire width direction H of the inner cylinder 12 of the one-side split ring member 23 and the inner cylinder 12 of the other-side split ring member 24 are separated in the tire width direction H. Thereby, it is prevented that the burr | flash generate | occur | produces in the internal peripheral surface of the inner cylinder body 12 externally fitted by the attachment body 11. FIG.

Further, the first divided case body 31 and the second divided case body 32 have the same shape and the same size as shown in FIG. 3 in a state before the connection of the 31, 32 as described above.
And when connecting as described above, each connecting member 15 in the tire circumferential direction of each of the first divided case body 31 and the second divided case body 32 is line-symmetric as described above in the tire side view. While aligning the positions, the outer casings 13 of the first split case body 31 and the second split case body 32 are in a state in which the directions of the tire width direction H of the split case bodies 31 and 32 are opposite to each other. The non-pneumatic tire 1 can be obtained by connecting the end edges in the tire width direction H while abutting each other.

  As described above, according to the non-pneumatic tire 1 according to the present embodiment, the first divided case body 31 in which the one-side divided ring member 23 and the first elastic connecting plate 21 are integrally formed, and the other-side divided ring. Since the member 24 and the second elastic connecting plate 22 are integrally formed with the second divided case body 32, when assembling the non-pneumatic tire 1, both end portions 21a of the plurality of connecting members 15 are provided. Since it is sufficient if the first and second divided case bodies 31 and 32 are attached to the attachment body 11 without connecting the 22a, 21b, and 22b to the inner cylinder body 12 and the outer cylinder body 13 separately, the manufacturing time is reduced. It can be shortened.

Further, since the first and second divided case bodies 31 and 32 are provided, for example, both end portions 21a, 22a, 21b, and 22b of the connecting member 15, the inner cylinder body 12 and the outer cylinder body 13 are connected to the fastening member. The weight can be reduced as compared with the case of connecting with the like.
Further, a plurality of first elastic connecting plates 21 are arranged along the tire circumferential direction at a position in one tire width direction H, and the second elastic connecting plates 22 are arranged around the tire circumference at other tire width direction H positions. Since a plurality are arranged along the direction, it is possible to prevent the adjacent connecting members 15 from interfering with each other in the tire circumferential direction, and it is possible to prevent the number of arrangement members from being limited.

  Further, in the first elastic connecting plate 21, one end 21 a connected to the outer cylinder 13 is located on one side in the tire circumferential direction with respect to the other end 21 b connected to the inner cylinder 12, and the second Of the elastic connecting plate 22, one end 22 a connected to the outer cylinder 13 is located on the other side in the tire circumferential direction with respect to the other end 22 b connected to the inner cylinder 12. When an external force is applied to the entering tire 1, the first elastic connecting plate 21 and the second elastic connecting plate 22 can be easily elastically deformed, and the non-pneumatic tire 1 has good flexibility. Secure ride comfort.

  Further, in each of the first divided case body 31 and the second divided case body 32, the first elastic connecting plate 21 and the second elastic connecting plate 22 are arranged between the outer cylindrical body 13 and the inner cylindrical body 12. When the ring member 14 and the connecting member 15 are formed, only one of a plurality extending in a certain direction is disposed and the other extending in the other direction is not disposed in a side view of the tire. A case in which the ring member 14 and the connecting member 15 are formed integrally by forming the first and second divided case bodies 31 and 32 which are simple and easy to form, and the structure is complicated. This non-pneumatic tire 1 can be formed easily and reliably compared to the case of forming a body.

Moreover, since the 1st, 2nd division | segmentation case bodies 31 and 32 are each integrally formed by casting or injection molding, this non-pneumatic tire 1 can be formed still more easily.
Moreover, as described above, in each of the divided case bodies 31 and 32, only one of the elastic coupling plates 21 and 22 is disposed between the outer cylinder body 13 and the inner cylinder body 12. Therefore, when the divided case bodies 31 and 32 are integrally formed by casting or injection molding, it becomes possible to easily make the molten metal or molten resin easily reach every corner of the mold. It is also possible to suppress the structure from becoming complicated, and the non-pneumatic tire 1 can be formed more easily and reliably.

  Further, since the connecting member 15 is formed symmetrically with respect to the virtual line L in the tire side view, the spring constant along one side in the tire circumferential direction and the other side of the non-pneumatic tire 1 are along. It becomes possible to suppress the difference between the spring constant and good maneuverability.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the bending direction of the bending portions 21d to 21f in the first elastic connecting plate 21 and the bending direction of the bending portions 22d to 22f in the second elastic connecting plate 22 are not limited to the above embodiment, and may be changed as appropriate.
Moreover, in the said embodiment, although the structure provided with the 1st elastic connection board 21 and the 2nd elastic connection board 22 each as the connection member 15 was shown, it replaced with this and the 1st connection member 15 is 1st. A configuration may be adopted in which a plurality of elastic connecting plates 21 and a plurality of second elastic connecting plates 22 are provided in different positions in the tire width direction H.
A plurality of connecting members 15 may be provided along the tire width direction H between the inner cylinder 12 and the outer cylinder 13.

Further, the other end portions 21b and 22b of the first elastic connecting plate 21 and the second elastic connecting plate 22 are, for example, sandwiched the axis O in the tire radial direction on the outer peripheral surface of the inner cylindrical body 12 instead of the embodiment. May be connected to each position opposite to each other, or on the outer peripheral surface of the inner cylindrical body 12, tires are connected to the respective one end portions 21a, 22a of the first elastic connecting plate 21 and the second elastic connecting plate 22. You may connect with the position etc. which oppose in radial direction.
Further, instead of the above-described embodiment, the one end portions 21a and 22a of both the connecting plates 21 and 22 may be connected to the inner peripheral surface of the outer cylindrical body 13 at different positions in the tire circumferential direction.

Furthermore, it is not necessary to provide a gap in the tire width direction H between the inner cylinder 12 of the one-side split ring member 23 and the inner cylinder 12 of the other-side split ring member 24.
Further, three or more ring members 14 may be divided in the tire width direction H or may not be divided.
Further, the first and second divided case bodies 31 and 32 are not limited to the above embodiment, and may be formed by, for example, cutting.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

Next, the verification test about the effect demonstrated above was implemented.
The non-pneumatic tire 1 shown in FIGS. 1 to 4 was adopted as an example, and the non-pneumatic tire described in the above-mentioned prior art document was adopted as a comparative example. The tires were the same size.
Then, for each tire, the time and weight required for assembly were measured.
As a result, it was confirmed that the time required for assembly was 1/100 in the example compared to the comparative example, and the weight was reduced by 25% in the example compared to the comparative example.

DESCRIPTION OF SYMBOLS 1 Non-pneumatic tire 11 Attachment body 12 Inner cylinder 13 Outer cylinder 14 Ring member 15 Connection member 21 1st elastic connection board 22 2nd elastic connection board 21a, 22a One end part 21b, 22b The other end part 21d, 22d 1st Curved portion 21e, 22e Second curved portion 21f, 22f Third curved portion 23 One side divided ring member 24 Other side divided ring member H Tire width direction L Virtual line O Axis line

Claims (3)

An attachment attached to the axle;
A ring member including an inner cylinder that is externally mounted on the attachment body, and an outer cylinder that surrounds the inner cylinder from the outside in the tire radial direction;
A plurality of connecting members that are disposed along the tire circumferential direction between the inner cylindrical body and the outer cylindrical body, and that connect these both cylindrical bodies relatively elastically and freely,
With
The connecting member has a curved portion that curves in the tire circumferential direction at an intermediate portion positioned between one end connected to the outer cylinder and the other end connected to the inner cylinder. In the tire side view when the tire is viewed from the tire width direction, a plurality of the connecting members are formed along the direction in which the connecting member extends, and the bending directions of the curved portions adjacent to each other among the curved portions are opposite to each other. ,
The plurality of curved portions include a first curved portion that is curved so as to project toward one of the tire circumferential direction and the other side, and the first curved portion and the one end portion of the connecting member. A second bending portion that is located between and curved toward the opposite side of the bending direction of the first bending portion in the tire circumferential direction; and the other end portion of the first bending portion and the connecting member And a third bending portion that is curved so as to protrude toward the opposite side of the bending direction of the first bending portion in the tire circumferential direction,
In the connecting member, the first bending portion has a larger radius of curvature in the tire side view than the second bending portion and the third bending portion,
The connecting member is formed in line symmetry with respect to a center line extending along the tire radial direction in the tire side view,
The ring member and the plurality of connecting members are integrally formed,
Each of the connection members includes a first elastic connection plate and a second elastic connection plate, one end of which is connected to the outer cylinder and the other end of which is connected to the inner cylinder.
A plurality of the first elastic connecting plates are arranged at one tire width direction position along the tire circumferential direction, and the second elastic connecting plates are different in the other tire width direction from the one tire width direction position. A plurality are arranged along the tire circumferential direction at the position ,
In each of the first elastic connecting plate and the second elastic connecting plate, the plurality of curved portions are formed,
The plurality of curved portions formed on the first elastic coupling plate are curved so as to project toward the other side in the tire circumferential direction, the first curved portion, and the first elastic portion. The second bending portion that is located between the one end portion of the connecting plate and is curved so as to protrude toward one side in the tire circumferential direction, the first bending portion, and the first elastic connecting plate The third curved portion located between the other end portion and curved so as to protrude toward one side in the tire circumferential direction, and
The plurality of curved portions formed on the second elastic connecting plate are curved so as to project toward one side in the tire circumferential direction, the first curved portion, and the second elastic portion. The second bending portion, which is located between the one end portion of the connecting plate and curved so as to protrude toward the other side in the tire circumferential direction, the first bending portion, and the second elastic connecting plate A non-pneumatic tire , comprising: the third curved portion that is located between the other end portion and is curved so as to protrude toward the other side in the tire circumferential direction . The non-pneumatic tire according to claim 1 ,
Of the first elastic connecting plate, the one end is located on one side in the tire circumferential direction from the other end,
Of the second elastic connecting plate, the one end is located on the other side in the tire circumferential direction from the other end,
The one end portions of the first elastic connection plate and the second elastic connection plate in one of the connection members have different positions in the tire width direction on the inner peripheral surface of the outer cylindrical body, so that the tire circumferential direction The non-pneumatic tire characterized by being connected to the same position in. The non-pneumatic tire according to claim 2 ,
The said ring member is divided | segmented into the one side division | segmentation ring member located in the one side of a tire width direction, and the other side division | segmentation ring member located in the other side of a tire width direction, The non-pneumatic characterized by the above-mentioned tire.

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