Non-pneumatic tire
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×(H/S) 0.7 ≤K≤75×(H/S) 0.7 .
1. A non-pneumatic tire comprising a support structure for supporting a load from a vehicle, wherein
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 is configured such that elongated plate-like first connecting portions and elongated plate-like second connecting portions are arrayed along the tire circumferential direction, the first connecting portions being extended from one side in a tire width direction of the inner annular portion to another side in a tire width direction of the outer annular portion, and the second connecting portions being extended from another side in the tire width direction of the inner annular portion to one side in the tire width direction of the outer annular portion,
in each of the first connecting portions and the second connecting portions, a plate thickness is smaller than a plate width, and a plate thickness direction is oriented to the tire circumferential direction,
with S being a length in the tire width direction and H being a height in a tire radial direction for each of the first connecting portions and the second connecting portions, an inclination angle K of a centerline of the plate width of each of the first connecting portions and the second connecting portions with respect to the tire width direction in an intersecting portion of each of the first connecting portions and each of the second connecting portions when viewed from the tire circumferential direction satisfies a relationship of a following Expression (1):
30×( H/S ) 0.7 ≤K≤ 75×( H/S ) 0.7 (1),
at least either one of the first connecting portion and the second connecting portion when viewed from the tire circumferential direction includes a first bent portion in which an inclination angle of the centerline of the plate width with respect to the tire width direction changes,
an angle change of the inclination angle at the first bent portion is 45° or less,
the at least either one of the first connecting portion and the second connecting portion when viewed from the tire circumferential direction further includes a second bent portion in which the inclination angle of the centerline of the plate width with respect to the tire width direction changes, and
a difference between the angle change of the inclination angle in the first bent portion and an angle change of the inclination angle in the second bent portion is 30° or less.
2. The non-pneumatic tire according to claim 1 , wherein an intersection of the centerlines of the plate widths of the first connecting portion and the second connecting portion in the intersecting portion is located at a position in a range of 30 to 70% of the height H in the tire radial direction from an inner circumferential surface of the outer annular portion toward an inside in the tire radial direction.
3. The non-pneumatic tire according to claim 1 , wherein the angle change of the inclination angle in the second bent portion is 45° or less.