Toyo Tire Corporation

Noriyuki Tsuji

Koji Arakawa

Yutaka Nakamoto

A non-pneumatic tire includes: an inner annular portion; an outer annular portion; a plurality of coupling portions which couple the inner annular portion and the outer annular portion to each other and are provided independently of one another in a tire circumferential direction; at least one annular overall reinforcing layer embedded entirely in the outer annular portion in a tire width direction; and at least one annular partial reinforcing layer embedded only in a part of the outer annular portion in the tire width direction, wherein the outer annular portion includes a connecting region to which the plurality of coupling portions are connected, and a non-connecting region to which the plurality of coupling portions are not connected, in the tire width direction, and wherein the partial reinforcing layer overlaps the non-connecting region in a tire radial direction when viewed from the tire circumferential direction.

Non-pneumatic tire

A pneumatic tires includes a tread, a pair of sidewalls, and a pair of bead portions that are arranged at intervals wider than a rim width of a corresponding regular rim in a non-rim-assembled state. Each of the pair of the bead portions includes a bead base at an inner diameter side end, a bead heel, and a bead back surface extending from an outer diameter side end of the bead heel, to the outer diameter side. In the non-rim-assembled state, the bead back surface is formed with a recess that is recessed inward in the width direction. In a rim-assembled state, the bead back surface is in close contact with substantially the entire surface of a radial portion of a rim flange of a regular rim.

Pneumatic tire

A pneumatic tire includes a pair of bead portions that are arranged at intervals wider than a regular rim width in a non-rim-assembled state. The bead portion includes a rim protector, a bead base, a bead heel, and a bead back surface. In the non-rim-assembled state, the bead back surface is formed with a recess that is recessed inward in the tire width direction. The bead back surface has a second curved portion constituting a deepest portion of the recess and a third curved portion extending inward in the tire width direction from the rim protector. When a height of the deepest portion is H2, a height H8 of a virtual intersection of a curve obtained by extending the second curved portion and a curve obtained by extending the third curved portion is larger than 1.5 times H10 and smaller than 3.0 times H10.

A non-pneumatic tire includes: an inner annular portion; an outer annular portion; and a plurality of connecting portions connecting the inner and outer annular portions to each other. The first and second connecting portions are arrayed along a tire circumferential direction. The first and second connecting portions have a plate thickness smaller than a plate width and have a plate thickness direction oriented to the tire circumferential direction. When S is a length in the tire width direction and H is a height in a tire radial direction in the first and second connecting portions, an inclination angle K of a centerline of each plate width w of the first and second connecting portions to the tire width direction in intersecting portions of the first and second connecting portions when viewed from the tire circumferential direction satisfies a relationship of 30&#xd7;(H/S)&#x2264;K&#x2264;75&#xd7;(H/S).

A non-pneumatic tire includes a support structure for supporting a load from a vehicle. The support structure includes an inner annular portion, an outer annular portion concentrically provided on an outer side of the inner annular portion, and a plurality of connecting portions which connect the inner annular portion and the outer annular portion to each other and are provided in a tire circumferential direction independently of one another, the plurality of connecting portions are configured such that elongated plate-like first connecting portions and elongated plate-like second connecting portions are arrayed along the tire circumferential direction, an angle &#x3b1; and an angle &#x3b2;, the angles being formed by an inner circumferential surface of the outer annular portion and both side surfaces of each of the connecting portions, both surfaces facing the tire circumferential direction, are 75&#xb0; or more and 120&#xb0; or less.

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Itami, Japan

Noriyuki Tsuji