Non-pneumatic tire

Patent metadata

Field	Value
Publication number	US-9895933-B2
Application number	US-201414892262-A
Country	US
Kind code	B2
Filing date	Jan 20, 2014
Priority date	Jun 11, 2013
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A non-pneumatic tire has high durability performance. A non-pneumatic tire is provided with: an annular tread section ( 2 ) which comes into contact with the road surface; an annular inner peripheral section ( 3 ) which is located on the inside of the tread section ( 2 ) in the radial direction of the tire; and a plurality of connection sections ( 4 ) which connect the tread section ( 2 ) and the inner peripheral section ( 3 ). The connection sections ( 4 ), the inner surface ( 2 b ) of the tread section ( 2 ), and/or the outer surface ( 3 a ) of the inner peripheral section ( 3 ) is provided with a plurality of dimples ( 5 ).

First claim

The invention claimed is:

1. A non-pneumatic tire comprising:
an annular tread portion that comes into contact with a road;
an annular inner peripheral portion being located radially inwardly of the tread portion; and
a plurality of connecting portions connecting the tread portion with the inner peripheral portion, wherein the connecting portions have a plate-like shape extending in an axial direction of the tire, the connecting portions are spaced from one another in the circumferential direction of the tire, and at least one of the connecting portions is provided with a plurality of dimples.

2. The non-pneumatic tire according to claim 1 , wherein a ratio A/B of a total surface area A of all the dimples to a total virtual surface area B of all of the surfaces of the connecting portions including all the dimples is in a range of from 10% to 80%.

3. The non-pneumatic tire according to claim 1 , wherein the connecting portions comprises a rough surface having a surface roughness of from 1 to 30 micrometer at least partially.

4. The non-pneumatic tire according to claim 1 , wherein the dimples have a depth of from 0.1 to 2 mm.

5. The non-pneumatic tire according to claim 1 , wherein the dimples have a diameter of from 1 to 20 mm.

6. The non-pneumatic tire according to claim 1 ,
wherein each of the connecting portions includes a central region having a center corresponding to a tire equatorial plane and a width being a half of the maximum width of the connecting portion, and a pair of shoulder regions each located between the central region and a side edge of the connecting portion, and
each shoulder region has a dimple surface ratio lower than that of the central region, where the dimple surface ratio is a total surface area of the dimples provided on the concerned region to the total virtual surface area of all of the surfaces of the concerned region of the connecting portion including all the dimples.

7. The non-pneumatic tire according to claim 1 ,
wherein each of the connecting portions comprises a central region having a center corresponding to a tire equatorial plane and a width being a half of the maximum width of the connecting portion and a pair of shoulder regions each located between the central region and a side edge of the connecting portion, and
the shoulder regions are provided with some dimples having a depth shallower than that of the dimples provided on the central region.

8. The non-pneumatic tire according to claim 1 , wherein the plurality of dimples comprise first dimples and second dimples, the second dimples having diameters smaller than those of the first dimples.

9. The non-pneumatic tire according to claim 8 , wherein
each of the connecting portions comprises a central region having a center corresponding to a tire equatorial plane and a width being a half of the maximum width of the connecting portion, and
the central region is provided with the first dimples and the second dimples.

10. The non-pneumatic tire according to claim 9 , wherein
each of the connecting portions comprises a pair of shoulder regions each located between the central region and a side edge of the connecting portion, and
the shoulder regions are provided with only the first dimples.

11. The non-pneumatic tire according to claim 10 , wherein the first dimples are arranged with same pitches in the central region and the shoulder regions.

12. The non-pneumatic tire according to claim 9 , wherein each of the second dimples is surrounded by a plurality of the first dimples.

13. The non-pneumatic tire according to claim 8 , wherein each of the second dimples is surrounded by a plurality of the first dimples.

Assignees

• Sumitomo Rubber Ind

Inventors

• Sugiya Makoto
• Iwamura Wako
• Asano Kazuo

Classifications

• B60C7/00 Primary

  Non-inflatable or solid tyres (B60C1/00 takes precedence) · CPC title

• B60C7/14 Primary

  using springs · CPC title

• B60C7/18

  disposed radially relative to wheel axis · CPC title

• B60C23/19

  for dissipating heat · CPC title

• B60C2007/146

  Operations & Transport · mapped topic