JP2008222038A - Non-pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-pneumatic tire capable of facilitating positioning of respective spokes of adjacent divided structures and eliminating variation between tires when a spoke structure is formed by combination of the plurality of divided structures. <P>SOLUTION: In the non-pneumatic tire, a tread ring 11 is mounted on the outer periphery of the spoke structure 1 constituted so as to circumferentially intermittently arrange the plurality of spokes 4 between annular outer peripheral member 2 and inner peripheral member 3. The spoke structure 1 is formed by the plurality of divided structures 51 (52, 53) divided in the tire width direction, and the positions of the spokes 4 are circumferentially shifted from each other between the adjacent divided structures 51, 52. Interfaces 6 between the divided structures 51, 52 are formed to have an irregular shape engaged with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a non-pneumatic tire, and more particularly to a non-pneumatic tire that facilitates the positioning of spokes between each other when the spoke structure is constituted by a divided structure divided into a plurality of parts in the tire width direction.

  In order to improve the riding comfort performance of non-pneumatic tires that have been used mainly in industrial vehicles in the past and to be applicable to passenger vehicles, as shown in FIG. A non-pneumatic tire has been proposed in which a spoke structure 1 in which a large number of spokes 4 are radially formed is interposed (see, for example, Patent Document 1).

  However, in the non-pneumatic tire having the spoke structure in this manner, since the spokes are intermittently arranged at a predetermined interval in the circumferential direction, the compression rigidity is different between a portion where the spoke is present and a portion where the spoke is not present on the circumference. . For this reason, there has been a problem that the vibration during running is increased, and the ride comfort cannot be equal to that of a pneumatic tire.

The present inventors have solved this problem by suppressing the spoke structure by dividing the spoke structure into a plurality of bands in the tire width direction and shifting the positions of the spokes in the circumferential direction between the divided structures. I found what I can do. However, it is very difficult to assemble the divided structure divided into a plurality of parts with the spoke positions accurately positioned, and there is a problem that variations occur between tires.
Special Table 2005-500932 Publication

  An object of the present invention is to provide a non-pneumatic tire that facilitates positioning between spokes of adjacent divided structures and eliminates variations between tires when the spoke structure is formed from a combination of a plurality of divided structures. Is to provide.

  The non-pneumatic tire of the present invention for achieving the above object is provided on the outer periphery of a spoke structure configured such that a large number of spokes are intermittently arranged in the circumferential direction between an annular outer peripheral member and an inner peripheral member. In a non-pneumatic tire attached with a tread ring, the spoke structure is divided into a plurality of divided structures in the tire width direction, and the positions of the spokes are shifted in the circumferential direction between the adjacent divided structures. It is characterized in that it is arranged and the interface between these divided structures is formed in an uneven shape that meshes with each other.

  In another non-pneumatic tire of the present invention, a tread ring is attached to the outer periphery of a spoke structure configured to intermittently arrange a large number of spokes in the circumferential direction between an annular outer peripheral member and an inner peripheral member. In the non-pneumatic tire, the spoke structure is divided into a plurality of divided structures in the tire width direction, and the positions of the spokes are shifted in the circumferential direction between the adjacent divided structures, and these A plurality of through holes communicating between the divided structures are provided, and a connecting pin is inserted into these through holes.

  Further, in any non-pneumatic tire, the divided structure is preferably divided into a plurality of tire circumferential directions, and a division interface in the tire circumferential direction forms an engagement surface that faces the tire radial direction. It is good to do so.

  Moreover, it is good to form the unevenness | corrugation which mutually meshes in the joining interface of the said spoke structure and the said tread ring.

  The former non-pneumatic tire of the present invention is composed of a split structure in which the spoke structure is divided into a plurality of parts in the tire width direction, and the positions of the spokes are shifted in the circumferential direction between the adjacent divided structures. Because it is configured, the distance between spokes in the circumferential direction can be made as small as possible, and the difference in compression rigidity at each position in the circumferential direction can be reduced, so that vibration during driving can be suppressed and riding comfort can be reduced. Can be improved. In addition, since the interface between the divided structures is formed in an uneven shape that meshes with each other, positioning between the divided structures can be performed accurately and easily, and variations between tires can be eliminated.

  The latter non-pneumatic tire of the present invention is constituted by a divided structure in which the spoke structure is divided into a plurality in the tire width direction, and the positions of the spokes are shifted in the circumferential direction between the adjacent divided structures. Since it is comprised, the vibration at the time of driving | running | working can be suppressed similarly to the above, and riding comfort can be improved. In addition, a plurality of through-holes communicating between these divided structures are provided, and a connecting pin is inserted into these through-holes. Can be eliminated.

  As shown in the embodiment of FIG. 1, the non-pneumatic tire of the present invention is composed of a spoke structure 1 and a tread ring 11 joined to the outer peripheral side thereof, and the spoke structure 1 includes an annular outer peripheral member 2 and A large number of spokes 4 that are radially connected to the inner circumferential member 3 are arranged intermittently in the circumferential direction. The spoke structure 1 is divided into a plurality of divided structures 51, 52, and 53 in the tire width direction and between adjacent divided structures (for example, the divided structures 51 and 52 and the divided structures 52 and 53). The spokes 4 are combined and integrated so that the positions of the spokes 4 are shifted from each other by a half pitch in the circumferential direction. In the illustrated example, the number of divided structures is three, but the number of divided structures is not limited to this and may be two or more.

  As described above, when the divided structures are arranged such that the positions of the spokes are shifted in the circumferential direction, it is possible to reduce the difference in compression rigidity between the portion where the spoke is located and the portion where the spoke is not located. The vibration in the radial direction at the time of traveling is reduced, and smooth rotation is obtained, so that riding comfort is improved.

  As shown in FIG. 2, the divided structures 51, 52, and 53 are formed in a concave / convex shape in which rectangles are arranged in a zigzag shape, and the three divided structures are engaged with each other. A spoke structure 1 in which the bodies 51, 52, and 53 are combined together is formed. In this way, by forming the dividing interface 6 in the tire width direction in a concave and convex shape that meshes with each other in the tire circumferential direction, positioning is performed when the spokes 4 are assembled with the positions of the spokes 4 being shifted from each other in the circumferential direction between the divided structures. Can be set accurately and easily. Therefore, even when a large number of spoke structures are assembled, the spoke positions can be manufactured so that there is no variation between the spoke structures.

  FIG. 3 is an explanatory diagram showing an example of another embodiment of the present invention.

  The concavo-convex shape that determines the relative position between adjacent divided structures is not limited to the rectangular zigzag described above, but is provided on one of the divided structures 51 and 52 in the tire width direction as in the example of FIG. A hole extending in the width direction may be formed, and a pin-like protrusion 7 engaging with the hole may be provided on the other side. Thus, by inserting the protrusions 7 protruding from the one divided structure 52 in the tire width direction into the holes of the other divided structure 51, the displacement of the spoke 4 between the divided structures 51 and 52 can be accurately and accurately determined. It can be easily positioned.

  FIG. 4 is an explanatory view showing an example of still another embodiment of the present invention.

  In this embodiment, a plurality of through holes 8 communicating with each other in the width direction are provided at regular intervals in the divided structures 51 and 52 to be assembled with each other. These divided structures 51 and 52 are set in a state where both spokes 4 are displaced in the circumferential direction and assembled by inserting connecting pins 9 into the through holes 8. Thus, by inserting the connecting pin 9 into the through hole 8 in the tire width direction, it is possible to accurately position the spoke displacement between the two divided structures.

  In the present invention, in order to facilitate the rim assembly of the spoke structure described above, it is preferable to have a structure divided into a plurality of parts in the tire circumferential direction. Furthermore, as shown in FIGS. 5 to 8, it is preferable to form an engagement surface that faces the division interface of the division structure 51 (52, 53) in the tire circumferential direction so as to face each other in the tire radial direction.

  In the embodiment of FIG. 5, in the divided structure 51 (52, 53) divided in the circumferential direction, one end of the inner circumferential member 3 is formed in a step shape, and the upper side in the tire radial direction is in the tire circumferential direction. A protruding convex portion 13 is formed, and an end opposite to the protruding convex portion 13 is formed in a stepped shape so as to have a convex portion 13 ′ protruding on the lower side in the tire radial direction. Further, in the embodiment of FIG. 6, in the divided structure 51 (52, 53), the divided interfaces at both ends of the inner peripheral member 3 are formed obliquely, and one end portion is inclined upward toward the outer side in the tire radial direction. With respect to the end surface 14, the other end is formed on a downward inclined end surface 14 'facing inward in the tire radial direction.

  In the embodiment of FIG. 7, in the divided structure 51 (52, 53) divided in the tire circumferential direction, a hole 15 extending in the circumferential direction is formed at one end of the inner circumferential member 3, and the other is A pin-like protrusion 16 that engages with the hole is provided.

  In the embodiment of FIG. 8, in the divided structure 51 (52, 53), a plurality of convex portions 13 that protrude in the tire circumferential direction and invade into each other are formed at both ends of the inner circumferential member 3. They are formed alternately in the tire width direction.

  As shown in FIGS. 5 to 8, the divided interface of the divided structural bodies 51 (52, 53) divided in the tire circumferential direction is formed in a shape facing each other in the tire radial direction, and thus assembled to the rim. Sometimes, the tires can be restrained in the radial direction of the tire so that there is no step in the radial direction of the entire tire.

  It is good to form the unevenness | corrugation which mutually meshes | joins in the joining interface where the outer peripheral surface of the spoke structure 1 of this invention and the tread ring 11 fit. Although the shape of such an unevenness | corrugation is not specifically limited, For example, what is shown to FIG. 9 (A)-(F) can be illustrated as a shape when it sees from the outer peripheral surface by the side of a spoke structure. 9A shows a plurality of grooves 21 extending parallel to the tire circumferential direction, FIG. 9B shows a plurality of grooves 21 extending parallel to the tire width direction, and FIG. 9C shows a plurality of grooves inclined parallel to the tire circumferential direction. The grooves 21, (D) are a plurality of grooves 21 intersecting in a lattice pattern, (E) is a plurality of grooves 21 arranged intermittently, and (F) is a dimple-shaped recess 21. Moreover, you may make it combine multiple types of unevenness | corrugation among these. The inner surface side of the tread ring may have the same pattern that is inverted with respect to the outer peripheral surface of the spoke structure.

  In the example of FIGS. 9A to 9E, each groove is formed in a straight line, but the groove may be formed in a curved line, or may be formed in a wave shape or a zigzag shape. . In this way, by forming irregularities that mesh with each other at the joint interface between the outer peripheral surface of the outer peripheral member of the spoke structure and the inner surface of the tread ring, the coupling force between the spoke structure and the tread ring is increased, and the slippage during running, etc. Can be prevented.

  In the present invention, the outer peripheral member and the inner peripheral member of the spoke structure are preferably made of rubber or resin, rubber or resin coated with a cord reinforcing material, and more preferably rubber or resin. The materials constituting the outer peripheral member and the inner peripheral member may be the same or different. The spoke is not particularly limited as long as it is an elastic material. Preferably, rubber and elastic resin can be used.

  The non-pneumatic tire of the present invention is mainly suitable as an automobile tire, but can also be used as a motorcycle tire or a bicycle tire.

It is a perspective view which isolate | separates and shows an example of embodiment of the non-pneumatic tire of this invention. It is explanatory drawing which expands and shows an example of embodiment which joins the spoke structure used for this invention to the width direction. It is a perspective view which shows an example of other embodiment which joins the division structure used for this invention to the width direction. It is a perspective view which shows an example of other embodiment which joins the division structure used for this invention to the width direction. It is a perspective view which shows an example of embodiment which joins the division structure used for this invention to the circumferential direction. It is a perspective view which shows an example of other embodiment which joins the division structure used for this invention to the circumferential direction. It is a perspective view which shows an example of other embodiment which joins the division structure used for this invention to the circumferential direction. It is a perspective view which shows an example of other embodiment which joins the division structure used for this invention to the circumferential direction. (A)-(F) is a development view to the tire peripheral direction which shows an example of the embodiment of the unevenness formed in the outer peripheral surface of the division structure used for the present invention. It is the perspective view which mounted | wore the wheel with the conventional non-pneumatic tire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spoke structure 2 Outer peripheral member 3 Inner peripheral member 4 Spoke 51, 52, 53 Split structure 6 Interface 7 Protrusion 8 Through-hole 9 Connection pin 11 Tread ring 12 Wheel 13 Protrusion 14 Inclined end face 15 Hole 16 Protrusion 21 Groove Dent

Claims (4)

In a non-pneumatic tire in which a tread ring is attached to the outer periphery of a spoke structure configured to intermittently arrange a large number of spokes in the circumferential direction between an annular outer peripheral member and an inner peripheral member,
The spoke structure is divided into a plurality of divided structures in the tire width direction, the positions of the spokes are shifted from each other in the circumferential direction between the adjacent divided structures, and the interface between the divided structures Is a non-pneumatic tire that is formed in an uneven shape that meshes with each other. In a non-pneumatic tire in which a tread ring is attached to the outer periphery of a spoke structure configured to intermittently arrange a large number of spokes in the circumferential direction between an annular outer peripheral member and an inner peripheral member,
The spoke structure is divided into a plurality of divided structures in the tire width direction, the positions of the spokes are shifted from each other in the circumferential direction between the adjacent divided structures, and the spoke structures communicate with each other. A non-pneumatic tire in which a plurality of through holes are provided and connecting pins are inserted into the through holes.   The non-pneumatic tire according to claim 1 or 2, wherein the divided structure is divided into a plurality in the tire circumferential direction, and an engagement surface facing the tire radial direction is formed at a division interface in the tire circumferential direction.   4. The non-pneumatic tire according to claim 1, wherein unevenness that meshes with each other is formed at a joint interface between the spoke structure and the tread ring.

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