JP5608445B2 - 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.

As this type of non-pneumatic tire, 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 a tire circumferential direction There is known a configuration including a plurality of connecting members that are provided and connect a mounting body and a ring-shaped body.
The connecting member is a first extending extending in a curved manner so as to protrude toward one side in the tire circumferential direction from the outer side in the tire radial direction toward the inner side in the tire side view when the tire is viewed from the axial direction. A connecting plate, and a second connecting plate extending curvedly toward the other side in the tire circumferential direction, each end of each connecting plate being connected to the inner peripheral surface side of the ring-shaped body In addition, each other end is connected to an attachment body.
According to such a non-pneumatic tire, it is possible to prevent the occurrence of puncture while suppressing the increase in weight, hardness and rolling resistance and ensuring good riding comfort and maneuverability.

JP 2010-036885 A

  However, in the conventional non-pneumatic tire, the other end portions of the two connection plates are connected to the outer peripheral surface of the mounting body by bonding or adhesion, so that not only the attachment / detachment takes time but also the attachment. There is a possibility that the attachment positions of the other end portions of the two connection plates with respect to the outer peripheral surface of the body may vary, or the attachment cost of the other end portions of the two connection plates occupying the outer peripheral surface of the attachment body may be bulky.

  The present invention has been made in consideration of such circumstances, and each of the other end portions of both connection plates can be easily and accurately attached to and detached from the outer peripheral surface of the attachment body. It aims at providing the non-pneumatic tire which can suppress the attachment margin of each other end part of both the connecting plates which occupies the outer peripheral surface of this.

In order to solve the above problems and achieve such an object, the non-pneumatic tire of the present invention includes an attachment body attached to an axle, and a ring-like body surrounding the attachment body from the outside in the tire radial direction. A non-pneumatic tire provided with a plurality of connecting members that are provided along the tire circumferential direction and connect the attachment body and the ring-shaped body, and the connecting member removes the tire from its axial direction. As viewed from the side of the tire, the first connecting plate extending while curving so as to be convex toward one side in the tire circumferential direction, and the other side in the tire circumferential direction, gradually from the outside in the tire radial direction toward the inside. A second connecting plate that extends while being curved so as to be convex, and each one end portion of both the connecting plates is connected to the inner peripheral surface side of the ring-shaped body, and each other end portion is On the mounting body The other end of each of the connecting plates is inserted into a plurality of storage grooves formed at intervals in the tire circumferential direction on the outer peripheral surface of the attachment body and connected to the attachment body, and the storage groove wherein the open end of the outer peripheral surface of the mounting member, of the tire circumferential direction, in the direction in which the first connecting plate or the second connecting plate inserted into the receiving groove is convexly curved in the previous SL tire side view of The chamfered portion is formed on the wall portion facing the opposite side.

In the present invention, the other end portions of both the connecting plates are inserted into the storage grooves and connected to the mounting body, so that the other end portions of both connecting plates are connected to the outer periphery of the mounting body by, for example, bonding or bonding. Compared with the case of connecting to the surface, the other end portions of both connecting plates can be attached to the attachment body with high accuracy, and attachment and removal can be easily performed.
Also, as described above, since the other end portions of the both connecting plates are inserted into the storage grooves and connected to the mounting body, for example, the other end portions of both the connecting plates are connected to the mounting body by bonding or bonding. Compared with the case of connecting to the outer peripheral surface, it is possible to reduce the mounting margin of each other end of both connecting plates occupying the outer peripheral surface of the mounting body. Therefore, for example, without reducing the number of connecting members or increasing the outer diameter of the attachment body, the attachment allowance is widened to improve the connection strength between the other end portions of both connection plates and the attachment body. Can be easily realized.
Furthermore, at the opening end portion of the storage groove, the first connection plate or the second connection plate inserted into the storage groove in the circumferential direction of the tire is opposite to the direction in which the first connection plate is curved and convex in the tire side view. Since the chamfered portion is formed on the wall portion facing the outside, an external force such as the weight of the vehicle body, for example, moves the attachment body and the ring-shaped body relatively closer to the non-pneumatic tire in the tire radial direction. When each of the connecting plates is bent and deformed to further reduce the original radius of curvature of the intermediate portion in the extending direction in the side view of the tire, the wall portion at the opening end portion of the storage groove is The other end portions of both connecting plates can be brought into contact with a surface instead of a corner, or can be made non-contact. Therefore, it is possible to suppress damage to both the connecting plates and the attachment body, and it is possible to reduce friction loss and prevent an increase in rolling resistance.

Furthermore, since each other end of each of the connecting plates is connected to the mounting body by being inserted into the storage groove, the storage groove is cut in the cutting direction in which it cuts from the outer peripheral surface of the mounting body toward the inside thereof. In the case of non-penetrating forward, both connecting plates are used when an external force such as the weight of the vehicle body acts on the non-pneumatic tire and the attachment body and the ring-shaped body move relatively closer to the tire radial direction. It becomes possible to make each other end part contact | abut to the front-end surface located in the front end of the said cutting direction among the wall surfaces which define a storage groove. Therefore, compared with the case where each other end part of both connection plates is connected to the outer peripheral surface of the attachment body, for example, by bonding or adhesion, the durability and strength of the connection part between each other end part of both connection plates and the attachment body. Can be improved.
In addition, when the extending direction in the tire side view of each of the other end portions of both connecting plates coincides with the cutting direction of the storage groove into which the other end portion is inserted, The end portion can be easily entered into the storage groove, and the cost increase of the non-pneumatic tire can be suppressed. Further, when the other end portions of both connecting plates are formed flat or in a single arc shape, both connecting plates can be easily formed, and the cost of the non-pneumatic tire is increased. Can be reliably suppressed.

  Here, the attachment body may be formed with a female screw portion that opens into the housing groove, and the other end portions of the two connecting plates may be fixed by fixing bolts screwed to the female screw portion.

  In this case, since the other end portions of both connecting plates are fixed by fixing bolts screwed to the female screw portions, it is possible to reliably prevent the other end portions of both connecting plates from coming out of the storage grooves. be able to.

  The chamfered portion may be formed in a convex curved shape.

  In this case, since the chamfered portion is formed in a convex curved shape, it is possible to reliably prevent the other end portions of both connecting plates and the wall portion at the opening end portion of the storage groove from abutting at the corners. Can do.

  According to the present invention, the other end portions of both connecting plates can be easily and accurately attached to and detached from the outer peripheral surface of the mounting body, and each other of both connecting plates occupying the outer peripheral surface of the mounting body. The mounting cost of the end 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 a schematic perspective view which shows a part of non-pneumatic tire of FIG. It is the front view which looked at some non-pneumatic tires shown in Drawing 1 and Drawing 2 from the tire width direction. It is a partial side view of the non-pneumatic tire shown in FIG. It is the X section enlarged view of the non-pneumatic tire shown in FIG. It is the Y section enlarged view of the non-pneumatic tire shown in FIG.

Hereinafter, an embodiment of a non-pneumatic tire according to the present invention will be described with reference to FIGS. 1 to 6.
The non-pneumatic tire 1 includes a mounting body 11 attached to an axle (not shown), a ring-shaped body 12 surrounding the mounting body 11 from the outside in the tire radial direction, and a plurality of mounting bodies 11 provided along the tire circumferential direction. A connecting member 13 that connects the outer peripheral surface side and the inner peripheral surface 12b side of the ring-shaped body 12, a tread member 14 disposed on the outer peripheral surface 12c side of the ring-shaped body 12 over the entire circumference, and the ring-shaped body 12 And a reinforcing layer 15 disposed between the tread member 14 and the tread member 14.
The attachment body 11, the ring-shaped body 12, the tread member 14, and the reinforcing layer 15 are each formed with the same size in the tire width direction H and are coaxial with the axis O in the tire width direction H. The central portions are arranged to coincide with each other.

  The attachment body 11 is formed in a cylindrical shape, and a plurality of ribs 11 a extending along the tire radial direction and having both ends connected to the inner peripheral surface of the attachment body 11 are provided inside the attachment body 11. These ribs 11a are arranged point-symmetrically with respect to the axis O. A mounting hole 11b into which the front end of the axle is fitted is formed at the center in the tire radial direction where the plurality of ribs 11a intersect inside the mounting body 11. The attachment body 11 and the rib 11a are integrally formed of a metal material such as an aluminum alloy.

The tread member 14 is formed in a cylindrical shape, and integrally covers the outer peripheral surface 12c side of the ring-shaped body 12 over the entire region. The tread member 14 is formed of, for example, a vulcanized rubber obtained by vulcanizing at least one of natural rubber and 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. In addition, it is preferable to form the tread member 14 with vulcanized rubber from the viewpoint of wear resistance.
The reinforcing layer 15 includes a rubber sheet formed in a cylindrical shape, and a steel cord embedded in a plurality of rows in the rubber sheet. The reinforcing layer 15 is in close contact with the inner peripheral surface of the tread member 14 and the outer peripheral surface 12c of the ring-shaped body 12 by elastic restoring forces of both connecting plates 21 and 22 described later. The reinforcing layer 15 may be formed integrally with the tread member 14.

  The connecting member 13 is gradually curved so as to protrude toward one side in the tire circumferential direction from the outer side in the tire radial direction toward the inner side in the tire side view when the tire 1 is viewed from the axis O direction. A first connecting plate 21 that extends and a second connecting plate 22 that extends while being curved toward the other side in the tire circumferential direction are provided. Each of the first connection plate 21 and the second connection plate 22 is formed of, for example, a metal material or a resin material that has almost no hysteresis loss. One end portions 21 a and 22 a of both the connecting plates 21 and 22 are connected to the inner peripheral surface 12 b side of the ring-shaped body 12, and the other end portions 21 b and 22 b are connected to the attachment body 11.

  In each of the connecting plates 21 and 22, the intermediate portion positioned between the one end portion 21a and 22a and the other end portion 21b and 22b is curved so as to be convex in the tire circumferential direction as described above. In this intermediate portion, the one end side portion located on the one end portion 21a, 22a side has a larger radius of curvature in the tire side view and longer than the other end side portion located on the other end portion 21b, 22b side. Is getting longer. The one end portions 21a and 22a of the connecting plates 21 and 22 are connected to one end of the intermediate portion via a bent portion, and are directed toward the opposite side of the tire circumferential direction to the direction in which the intermediate portion is curved and convex. It is extended. The other end portions 21b, 22b of both the connecting plates 21, 22 are smoothly connected to the other end of the intermediate portion and extend in a direction substantially orthogonal to the one end portions 21a, 22a. In addition, the one end parts 21a and 22a and the other end parts 21b and 22b in both the connecting plates 21 and 22 are each formed in a flat or single arc shape.

  The one end portions 21 a and 22 a of the first connecting plate 21 and the second connecting plate 22 in one connecting member 13 are connected to the same position in the tire circumferential direction on the inner peripheral surface 12 b side of the ring-shaped body 12. These one end portions 21a and 22a are connected to the inner peripheral surface 12b side of the ring-shaped body 12 with different positions in the tire width direction H from each other. In the illustrated example, the one end portions 21 a and 22 a of the first connecting plate 21 and the second connecting plate 22 in one connecting member 13 are at both end portions in the tire width direction H on the inner peripheral surface 12 b side of the ring-shaped body 12. They are linked separately.

The shape of each connecting member 13 in the side view of the tire is line-symmetric with respect to an imaginary line L that extends through the tire circumferential direction center portion of the connecting member 13 along the tire radial direction, as shown in FIG. It has become. The imaginary line L passes through the one end portions 21a and 22a of the connecting plates 21 and 22 and the axis O.
That is, the lengths of both the connecting plates 21 and 22 are equal to each other, and the other end portions 21b and 22b of the both connecting plates 21 and 22 are arranged on the outer peripheral surface of the mounting body 11 in the tire side view. Each position is spaced apart from each end 21a, 22a in the tire radial direction by the same angle (for example, 20 ° to 135 °) on one side and the other side in the tire circumferential direction around the axis O. It is connected separately. When this angle is set to 20 ° or more and 90 ° or less, for example, both the connecting plates adjacent to each other in the tire circumferential direction can be reduced while reducing the weight of the non-pneumatic tire 1 while securing a large number of connecting members 13. It is possible to prevent interference between the two 21 and 22. Further, the other end portions 21 b and 22 b of both the connecting plates 21 and 22 are respectively connected to both end portions in the tire width direction H on the outer peripheral surface of the attachment body 11.

  The plurality of connecting members 13 are separately arranged between the attachment body 11 and the ring-shaped body 12 at positions that are point-symmetric with respect to the axis O. Further, the connecting member 13 includes a plurality of first connecting plates 21 arranged along the tire circumferential direction at a position in one tire width direction H, and the second 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. Furthermore, all the connecting members 13 have the same shape and size.

  Further, the first connecting plates 21 adjacent in the tire circumferential direction are substantially parallel to each other and opposed in the tire circumferential direction, and the second connecting plates 22 adjacent in the tire circumferential direction are also substantially parallel to each other. Opposing in the circumferential direction. Further, a plurality of first connection plates 21 are disposed at one end in the tire width direction H of the non-pneumatic tire 1, and the second connection plate 22 is the other end of the non-pneumatic tire 1 in the tire width direction H. A plurality are arranged in the section.

  The sizes of the first connecting plate 21 and the second connecting plate 22 in the tire width direction H (the direction of the axis O), that is, the widths thereof are equal to each other. The thicknesses of the first connecting plate 21 and the second connecting plate 22 are also equal to each other. Furthermore, in each of these connection plates 21 and 22, the widths of the one end portions 21a and 22a and the other end portions 21b and 22b are larger than the intermediate portions located between them.

  The ring-shaped body 12 is divided into a large number of ring divided bodies 12a along the tire circumferential direction. The ring divided body 12a is formed of a metal material, and its size in the tire radial direction, that is, its thickness is larger than the thickness of both the connecting plates 21 and 22. Moreover, the both ends of the tire width direction H in the back surface of the ring division body 12a which comprises the internal peripheral surface 12b of the ring-shaped body 12 are depressed. Further, a gap in the tire circumferential direction is provided between the ring divided bodies 12a adjacent in the tire circumferential direction. Furthermore, each one end part 21a, 22a of both the connection plates 21 and 22 in one connection member 13 is connected separately to both ends in the tire width direction H on the back surface of one ring divided body 12a.

Here, in the present embodiment, the one end portions 21a and 22a of the connecting plates 21 and 22 are ring-shaped by bolts 31 inserted from the outside in the tire radial direction into the insertion holes 33 formed in the ring-shaped body 12. The body 12 is connected to the inner peripheral surface 12b side.
In the example shown in the drawing, a female screw member 32 having a female screw is disposed on each of the one end portions 21a and 22a of the connecting plates 21 and 22, and a first through hole is formed. Then, the bolt 31 inserted into the insertion hole 33 as described above is screwed into the female screw of the female screw member 32 through the first through hole, whereby each of the one end portions 21a of both the connecting plates 21 and 22; 22 a is sandwiched between the female screw member 32 and the ring-shaped body 12 in the tire radial direction and connected to the inner peripheral surface 12 b side of the ring-shaped body 12.

The outer portion of the insertion hole 33 located outside in the tire radial direction is a counterbore hole 33a, and the head of the bolt 31 is accommodated in the counterbore hole 33a. That is, the counterbore hole 33 a is a recess that houses the head of the bolt 31. In the illustrated example, the counterbore hole 33a is gradually reduced in diameter from the outer side to the inner side in the tire radial direction, and the head of the bolt 31 is a countersunk bolt formed in an inverted truncated cone shape.
The female screw member 32 is a plate body on which a plurality of female screws are formed, and a plurality of bolts 31 are provided. In the illustrated example, the female screw member 32 is formed in a rectangular shape in plan view that is long in the tire width direction H, and two female screws are formed at intervals in the tire width direction H. Note that two first through holes are formed at one end portions 21a and 22a of the connecting plates 21 and 22 at intervals in the tire width direction H, respectively.

In the ring-shaped body 12, there is provided an elastic member 16 that extends over the entire circumference along the tire circumferential direction and connects a large number of ring divided bodies 12a in the tire circumferential direction. The elastic member 16 is made of, for example, a vulcanized rubber obtained by vulcanizing at least one of natural rubber and a rubber composition, a metal material, a thermoplastic material, or the like. Examples of the metal material include aluminum and stainless steel. Examples of the thermoplastic material include the aforementioned thermoplastic elastomers or thermoplastic resins.
In the example shown in the drawing, the elastic members 16 are disposed separately at both ends in the tire width direction H in the ring-shaped body 12. Further, a gap in the tire radial direction is provided between a portion of the elastic member 16 located between the ring divided bodies 12 a adjacent in the tire circumferential direction and the inner peripheral surface of the reinforcing layer 15.

  The elastic member 16 is divided into a large number of elastic divided bodies 16a along the tire circumferential direction, and each elastic divided body 16a is a plate body having a rectangular shape in plan view long in the tire circumferential direction, as shown in FIG. Thus, one elastic division body 16a has connected two ring division bodies 12a in the tire peripheral direction. Further, by connecting the two elastic divided bodies 16a to one ring divided body 12a, the elastic member 16 extends over the entire circumference in the tire circumferential direction, and a large number of ring divided bodies 12a are connected to the entire tire circumferential direction. It is connected over the circumference. In addition, two second through holes are formed at both ends in the tire circumferential direction of the elastic divided body 16a at intervals in the tire width direction H. The bolt 31 inserted into the insertion hole 33 as described above is screwed into the female screw of the female screw member 32 through the first through hole and the second through hole.

In the present embodiment, a plurality of storage grooves 34 are formed on the outer peripheral surface of the attachment body 11 at intervals in the tire circumferential direction, and the other end portions 21b and 22b of both the connecting plates 21 and 22 are stored. It is connected to the attachment body 11 by being inserted into the groove 34.
The storage grooves 34 are formed separately at both ends in the tire width direction H on the outer peripheral surface of the attachment body 11 and open toward the outside in the tire width direction H. The other end portions 21b and 22b of the connecting plates 21 and 22 face or contact the inner wall surface facing the outer side in the tire width direction H from the outer side in the tire width direction H among the wall surfaces defining the storage groove 34. In the state of contact, both ends of the mounting body 11 in the tire width direction H are connected separately.

  Further, the storage groove 34 is non-penetrating forward in the cutting direction of cutting from the outer peripheral surface of the attachment body 11 toward the inside thereof. In addition, this cutting direction is inclined with respect to both the tire radial direction and the tire circumferential direction, and the extending direction in the tire side view of each of the other end portions 21b, 22b of both the connecting plates 21, 22 is as follows. The other end portions 21b and 22b coincide with the cutting direction of the storage groove 34 into which the other end portions 21b and 22b are inserted. Further, in the outer circumferential surface of the attachment body 11, the storage groove 34 located at one end in the tire width direction H and the storage groove 34 located at the other end in the tire width direction H are arranged in the tire circumferential direction. The formation positions along are different from each other.

Furthermore, in this embodiment, the female thread part 11c opened in the accommodation groove | channel 34 is formed in the attachment body 11, and each other end part 21b, 22b of both the connection plates 21 and 22 was screwed by this female thread part 11c. The fixing bolt 35 is pressed against the wall surface defining the storage groove 34 and fixed.
The female threaded portion 11c extends in a direction orthogonal to the cutting direction, and two of the female threaded portions 11c are arranged in the tire width direction H with respect to one storage groove 34. Further, the female screw portion 11 c passes through an intermediate portion of the storage groove 34 in the cutting direction in a direction orthogonal to the cutting direction, and is open to both the inner peripheral surface and the outer peripheral surface of the attachment body 11. The fixing bolt 35 is screwed into the female screw portion 11c from the inner peripheral surface side of the attachment body 11, and the other end portions 21b and 22b of both the connecting plates 21 and 22 are wall surfaces that define the storage groove 34. In the tire circumferential direction, the first connecting plate 21 or the second connecting plate 22 inserted into the storage groove 34 is fixed to a portion facing the opposite side of the curved and convex direction in the tire side view. It is pressed by a bolt 35.

In the present embodiment, the opening end of the storage groove 34 on the outer peripheral surface of the attachment body 11, that is, the rear end of the storage groove 34 in the cutting direction, is inserted into the storage groove 34 in the tire circumferential direction. A chamfered portion 34a is formed on a wall portion of the first connecting plate 21 or the second connecting plate 22 facing the opposite side of the direction in which the first connecting plate 21 or the second connecting plate 22 is curved and convex in the side view of the tire.
In the chamfered portion 34a, the clearance in the tire circumferential direction gradually increases with the other end portion 21b of the first connecting plate 21 or the other end portion 22b of the second connecting plate 22 as it goes from the front to the rear in the cutting direction. ing. The chamfered portion 34 a is inclined at 5 ° or more and 45 ° or less with respect to the cutting direction of the storage groove 34. Further, on the wall surface defining the storage groove 34, the first connection plate 21 or the second connection plate 22 inserted into the storage groove 34 in the tire circumferential direction is curved and convex in the tire side view. In the portion facing the direction, the other end portions 21b and 22b inserted into the storage groove 34 are in contact with each other over the entire length in the extending direction. Further, the chamfered portion 34 a is formed over the entire length in the tire width direction H of the opening end portion of the storage groove 34. Further, the front end of the chamfered portion 34a in the cutting direction is located behind the female screw portion 11c in the cutting direction.

  As described above, according to the non-pneumatic tire 1 according to the present embodiment, the other end portions 21b and 22b of the first connecting plate 21 and the second connecting plate 22 are inserted into the storage groove 34 and attached. 11, compared with the case where the other end portions 21 b, 22 b of both the connection plates 21, 22 are connected to the outer peripheral surface of the mounting body 11, for example, by bonding or adhesion, etc. Each of the other end portions 21b and 22b can be attached to the attachment body 11 with high accuracy and can be easily attached and detached.

  Since the other end portions 21b and 22b of the connecting plates 21 and 22 are inserted into the storage groove 34 and connected to the mounting body 11 in this way, for example, both connecting plates 21 and Compared to the case where the other end portions 21b and 22b of the connection body 22 are connected to the outer peripheral surface of the attachment body 11, the attachment cost of the other end portions 21b and 22b of the connecting plates 21 and 22 occupying the outer peripheral surface of the attachment body 11 It becomes possible to keep it narrow. Therefore, for example, even if the number of the connecting members 13 is not reduced or the outer diameter of the attachment body 11 is not increased, the attachment margin is widened and the other end portions 21b, 22b of the connection plates 21, 22 and the attachment body are increased. 11 can be easily realized.

  Furthermore, since the storage groove 34 is non-penetrating forward in the cutting direction, an external force such as the weight of the vehicle body acts on the non-pneumatic tire 1 to cause the attachment body 11 and the ring-shaped body 12 to move relative to each other. When the movement toward the tire radial direction is made, the other end portions 21b and 22b of the connecting plates 21 and 22 are placed on the front end surface located at the front end in the cutting direction among the wall surfaces defining the storage groove 34. It becomes possible to contact. Therefore, compared with the case where each other end part 21b, 22b of both connection plates 21, 22 is connected to the outer peripheral surface of the attachment body 11, for example, by bonding or adhesion, the other end part 21b of both connection plates 21, 22; The durability and strength of the connecting portion between 22b and the attachment body 11 can be improved.

  Moreover, the extending direction in the tire side view of each of the other end portions 21b and 22b of both the connecting plates 21 and 22 coincides with the cutting direction of the storage groove 34 into which the other end portions 21b and 22b are inserted. Therefore, the other end portions 21b and 22b of the connecting plates 21 and 22 can be easily entered into the storage groove 34, and the cost increase of the non-pneumatic tire 1 can be suppressed. Furthermore, since the other end portions 21b and 22b of both the connecting plates 21 and 22 are formed in a flat or single arc shape, both the connecting plates 21 and 22 can be easily formed, and non-air The cost increase of the entering tire 1 can be reliably suppressed.

Further, in the present embodiment, the other end portions 21 b and 22 b of both the connecting plates 21 and 22 are formed on the wall surface defining the storage groove 34 by the fixing bolt 35 screwed to the female screw portion 11 c formed on the attachment body 11. Since it is pressed and fixed, it can suppress reliably that each other end part 21b and 22b of both these connection plates 21 and 22 remove | deviates from the accommodation groove | channel 34. FIG.
Further, in the present embodiment, an external force acts on the non-pneumatic tire 1 and the attachment body 11 and the ring-shaped body 12 are relatively displaced relatively in the tire width direction H, and one of the connecting plates 21 and 22 is displaced. Even if the other end portions 21b and 22b are displaced from the storage groove 34 toward the outer side in the tire width direction H, the other end portions 22b and 21b come into contact with the inner wall surface of the storage groove 34. The one other end 21b, 22b can be prevented from being detached from the storage groove 34.

Further, in the opening end portion of the storage groove 34, the first connection plate 21 or the second connection plate 22 inserted into the storage groove 34 in the tire circumferential direction is curved and convex in the tire side view. Since the chamfered portion 34a is formed on the wall portion facing in the opposite direction, the attachment body 11 and the ring-shaped body 12 are moved relatively closer to the tire radial direction to the non-pneumatic tire 1. For example, when an external force such as the weight of the vehicle body acts and the connecting plates 21 and 22 are bent and deformed so as to further reduce the original radius of curvature of the intermediate portion in the extending direction in the tire side view. The wall portion at the opening end portion of the groove 34 may be in contact with the other end portions 21b and 22b of both the connecting plates 21 and 22 by a surface instead of a corner, or may be non-contact. Therefore, it is possible to suppress damage to both the connecting plates 21 and 22 and the attachment body 11, and it is possible to reduce friction loss and prevent an increase in rolling resistance.
Furthermore, in this embodiment, since the chamfered portion 34a is inclined at 5 ° or more and 45 ° or less with respect to the cutting direction of the storage groove 34, the chamfered portion 34a is formed, so that the attachment body 11 of the female screw portion 11c is formed. It can prevent that the intensity | strength of the part located in an outer peripheral surface side falls.

In addition, since the elastic member 16 that extends along the tire circumferential direction and connects a large number of ring divided bodies 12a in the tire circumferential direction is provided in the ring-shaped body 12, the deformation of the ring-shaped body 12 It becomes possible to regulate the amount, and by dividing the ring-shaped body 12 into a large number of ring divided bodies 12a, it is possible to suppress the flexibility of the ring-shaped body 12 from becoming excessively high.
Therefore, the variation in the contact pressure within the contact surface can be reliably suppressed, and the ring-shaped body 12 is divided into a large number of ring divided bodies 12a, thereby increasing the rolling resistance of the non-pneumatic tire 1. Or it can suppress that the load concerning both the connection plates 21 and 22 becomes high.

  Among these, since it becomes possible to suppress that the load concerning both the connection plates 21 and 22 becomes high, in order to divide the ring-shaped body 12 into many ring division bodies 12a, both connection plates 21, It is not necessary to increase the bending rigidity of 22 and improve its durability, and it is possible to suppress an increase in the weight of these connecting plates 21 and 22. Therefore, it is possible to prevent the weight of the non-pneumatic tire 1 from increasing as the ring-shaped body 12 is divided into a large number of ring divided bodies 12a.

  Furthermore, since a large number of ring divided bodies 12a are connected in the tire circumferential direction by elastic members 16 instead of rigid bodies, it is possible to prevent the ground contact area from being greatly reduced, and the load received from the road surface Is distributed over a wide range of the non-pneumatic tire 1 through the elastic member 16, so that it is possible to prevent a portion where a large load is locally applied, and durability can be improved.

Moreover, in this embodiment, since the clearance of the tire circumferential direction is provided between the ring division bodies 12a adjacent in a tire circumferential direction, it becomes possible to improve the softness | flexibility of the non-pneumatic tire 1 reliably. Further, since a gap in the tire radial direction is provided between a portion of the elastic member 16 located between the ring divided bodies 12a adjacent to each other in the tire circumferential direction and the inner circumferential surface of the reinforcing layer 15, the road surface It is possible to reliably transmit the load received from both the connecting plates 21 and 22, and the above-described effects can be reliably achieved, and the tread member 14 and the reinforcing layer 15 are provided on the outer peripheral surface 12 c side of the ring-shaped body 12. Can be easily mounted.
Furthermore, in this embodiment, since the elastic member 16 is divided into a large number of elastic divided bodies 16a along the tire circumferential direction, the elastic member 16 having the above-described effects can be easily formed, It can be easily installed.

Moreover, in this embodiment, each end part 21a, 22a of both the connection plates 21 and 22 is ring-shaped body 12 with the bolt 31 inserted from the outer side of the tire radial direction in the insertion hole 33 formed in the ring-shaped body 12. Since it is connected to the inner peripheral surface 12b side, the one end portions 21a, 22a of both connecting plates 21, 22 and the inner peripheral surface 12b side of the ring-shaped body 12 can be easily connected and released. Thus, the cost increase of the non-pneumatic tire 1 can be suppressed.
Furthermore, since the head of the bolt 31 is housed in the counterbore hole 33 of the insertion hole 33, it is possible to prevent the head of the bolt 31 from protruding from the outer peripheral surface 12 c of the ring-shaped body 12. Interference between the head of the bolt 31 and the inner peripheral surface of the reinforcing layer 15 can be prevented.

Further, when the bolt 31 is screwed into the female screw of the female screw member 32, the one end portions 21 a and 22 a of both the connecting plates 21 and 22 are sandwiched between the female screw member 32 and the ring-shaped body 12 in the tire radial direction and are ring-shaped. Since it is connected to the inner peripheral surface 12 b side of the body 12, the one end portions 21 a and 22 a of both the connecting plates 21 and 22 can be firmly connected to the inner peripheral surface 12 b side of the ring-shaped body 12.
Furthermore, since the female screw member 32 is a plate body on which a plurality of female screws are formed and a plurality of bolts 31 are provided, the one end portions 21a and 22a of both the connecting plates 21 and 22 and the ring-shaped body 12 are provided. It is possible to prevent an increase in the number of female screw members 32 due to the use of a plurality of bolts 31 in order to increase the connection strength with the inner peripheral surface 12b side.

  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, instead of the elastic member 16 shown in the embodiment, for example, a bundle wire, a single wire or a stranded wire formed of steel or the like and extended along the tire circumferential direction, or extended along the tire circumferential direction. A coil spring may be used.
Moreover, if the arrangement | positioning position of the elastic member 16 shown in the said embodiment is a position which can connect many ring division bodies 12a in the tire circumferential direction in the ring-shaped body 12, for example, a ring-shaped body The inner peripheral surface 12b of the twelve inner peripheral surface 12b may be changed as appropriate, for example, at the center in the tire width direction H.
The elastic member 16 may be continuously extended over the entire circumference along the tire circumferential direction. Further, the elastic member 16 may not be provided.

Moreover, in the said embodiment, although the structure provided with the 1st connection plate 21 and the 2nd connection plate 22 respectively as the connection member 13 was shown, it replaces with this and the 1st connection plate is provided in one connection member 13. You may employ | adopt the structure with which 21 and the 2nd connection board 22 were respectively provided with the position of the mutual tire width direction H differing.
A plurality of connecting members 13 may be provided along the tire width direction H between the attachment body 11 and the ring-shaped body 12.

Furthermore, the material which forms the 1st connection board 21 and the 2nd connection board 22 is not restricted to said each embodiment, You may change suitably.
Further, the other end portions 21b and 22b of the first connecting plate 21 and the second connecting plate 22 are opposite to each other, for example, on the outer peripheral surface of the mounting body 11 with the axis O sandwiched in the tire radial direction instead of the embodiment. Each of the positions may be connected separately.

Furthermore, in place of the embodiment, the reinforcing layer 15 is bonded to the outer peripheral surface 12c of the ring-shaped body 12 with an adhesive or the like, and the outer peripheral surface is bonded to the inner peripheral surface of the tread member 14 with an adhesive or the like. May be fixed. Further, the reinforcing layer 15 may not be provided.
Furthermore, in the said embodiment, although each end part 21a, 22a of both the connection plates 21 and 22 in one connection member 13 was connected to one ring division body 12a, a plurality of rings adjacent to each other in the tire circumferential direction. You may connect across the division body 12a.
Moreover, it replaces with the said embodiment, and each end part 21a, 22a of both the connection plates 21 and 22 may be connected to the inner peripheral surface 12b side of the ring-shaped body 12 by making a tire circumferential direction position mutually differ.

Furthermore, in the said embodiment, each end part 21a, 22a of both the connection plates 21 and 22 is ring-shaped with the bolt 31 inserted from the outer side of the tire radial direction in the insertion hole 33 formed in the ring-shaped body 12. Although connected to the inner peripheral surface 12b side of 12, instead of this, for example, it may be connected to the inner peripheral surface 12b side of the ring-shaped body 12 by bonding or adhesion. Further, a female screw is formed in the ring-shaped body 12 instead of the insertion hole 33, and the bolts 31 are screwed into the female screw from the inner side in the tire radial direction, so that the one end portions 21a, 22a of both the connecting plates 21, 22 are ring-shaped. You may connect to the inner peripheral surface 12b side of the shape body 12. FIG.
Moreover, the insertion hole 33 which does not have the counterbore hole 33a may be employ | adopted, and the volt | bolt 31 may be selected suitably not only in a flat head bolt.

Further, the female screw member 32 is not limited to the above embodiment, and may be appropriately selected, for example, a nut. Further, without providing the female screw member 32, a female screw is formed at each one end portion 21a, 22a of both the connecting plates 21, 22, and a bolt 31 is screwed into this female screw, so that each one end portion 21a, You may connect 22a to the inner peripheral surface 12b side of the ring-shaped body 12. FIG.
Moreover, in the said embodiment, although the internal thread part 11c was formed in the attachment body 11, and the fixing bolt 35 was screwed by this internal thread part 11c, the structure which does not have the internal thread part 11c and the fixing bolt 35 may be employ | adopted.

Moreover, in the said embodiment, although the storage groove 34 was not penetrated ahead in the said cutting direction, you may penetrate. Furthermore, although the storage groove 34 is opened toward the outside in the tire width direction H, it may be closed. The storage groove 34 is not limited to both ends in the tire width direction H as long as it is the outer peripheral surface of the attachment body 11. The formation position may be changed as appropriate.
Furthermore, the ring-shaped body 12 and the elastic member 16 need not be divided into a large number along the tire circumferential direction.
Moreover, in the said embodiment, although the clearance of the tire circumferential direction was provided between the ring division bodies 12a adjacent in the tire circumferential direction, the circumferential edge of the ring division bodies 12a adjacent in the tire circumferential direction is mutually adjacent, or You may contact | abut.
Further, the tread member 14 may not be provided on the outer peripheral surface 12c side of the ring-shaped body 12.
Further, the shape of the connecting member 13 in the side view of the tire may be asymmetric with respect to the virtual line L.

Further, the chamfered portion 34 a may be formed in a convex curved shape toward the other end portion 21 b of the first connecting plate 21 or the other end portion 22 b of the second connecting plate 22.
In this case, it is possible to reliably prevent the other end portions 21b and 22b of the connecting plates 21 and 22 and the wall portion at the opening end portion of the storage groove 34 from coming into contact with each other at the corners.
Further, in the above embodiment, the front end of the chamfered portion 34a in the cutting direction is located behind the female screw portion 11c in the cutting direction. However, the front end of the chamfered portion 34a in the cutting direction is cut into the female screw portion 11c. You may connect from the back side of a direction.

  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.
As an example, the non-pneumatic tire 1 shown in FIGS. 1 to 6 was employed, and as a comparative example, a configuration without the chamfered portion 34a was employed in the non-pneumatic tire 1 of the example. The tire sizes of these examples and comparative examples were both 145 / 80R13.

First, using the comparative example as an evaluation criterion (100), the durability and rolling resistance of the non-pneumatic tire 1 of the example were evaluated by an index.
Regarding durability, the non-pneumatic tires of the comparative example and the example were rotated at a speed of 80 km / h in a state where the non-pneumatic tires were pressed onto the drum of the drum tester with a force of 2.5 kN, and the storage groove in the mounting body 11 Evaluation was made based on the time when breakage occurred at the opening end portion of 34, the other end portion 21 b of the first connecting plate 21, or the other end portion 22 b of the second connecting plate 22.
For rolling resistance, each tire described above was placed on the drum of the drum tester 2.5. The resistance force acting on the drum shaft when rotating at a speed of 80 km / h while being pressed with a force of kN was measured.

The results are shown in Table 1.
In this table, it is shown that durability is better as the numerical value is larger, and rolling resistance is better as the numerical value is smaller.

  As a result, in the non-pneumatic tire 1 of the embodiment, it is possible to suppress breakage of both the connecting plates 21 and 22 and the attachment body 11, and it is possible to reduce friction loss and prevent an increase in rolling resistance. confirmed.

  It is possible to attach and detach each other end of both connecting plates to the outer peripheral surface of the mounting body easily and with high accuracy. Can be suppressed.

DESCRIPTION OF SYMBOLS 1 Non-pneumatic tire 11 Attachment body 11c Female thread part 12 Ring-shaped body 12b Inner peripheral surface of a ring-shaped body 13 Connection member 21 1st connection plate 22 2nd connection plate 21a, 22a One end part 21b, 22b The other end part 34 Storage groove 34a Chamfered portion 35 Fixing bolt O Axis

Claims (3)

An attachment attached to the axle;
A ring-shaped body surrounding the mounting body from the outside in the tire radial direction;
A non-pneumatic tire provided with a plurality of connecting members that are provided along the tire circumferential direction and connect the attachment body and the ring-shaped body,
The connecting member extends in a curved manner so as to protrude toward one side in the tire circumferential direction from the outer side in the tire radial direction toward the inner side in the tire side view when the tire is viewed from the axial direction. 1 connection plate, and a second connection plate extending while curving so as to protrude toward the other side in the tire circumferential direction,
Each one end part of these both connecting plates is connected to the inner peripheral surface side of the ring-shaped body, and each other end part is connected to the attachment body,
Each other end of each of the connecting plates is connected to the mounting body by being inserted into a plurality of storage grooves formed at intervals in the tire circumferential direction on the outer peripheral surface of the mounting body,
In the open end of the outer peripheral surface of the mounting member of the receiving groove, of the tire circumferential direction, a convex first connecting plate or the second connecting plate inserted into the receiving groove is curved in front Symbol tire side view A non-pneumatic tire characterized in that a chamfered portion is formed on a wall portion facing in the opposite direction. The non-pneumatic tire according to claim 1,
The attachment body is formed with a female screw portion that opens into the storage groove, and the other end portions of the two connecting plates are fixed by fixing bolts screwed to the female screw portion. Non-pneumatic tire. The non-pneumatic tire according to claim 1 or 2,
The non-pneumatic tire characterized in that the chamfered portion is formed in a convex curved shape.

Images