Nonpneumatic tire

Patent metadata

Field	Value
Publication number	US-11654716-B2
Application number	US-202016869996-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	Nov 10, 2017
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

An object of the present disclosure is to provide a non-pneumatic tire having a small temperature dependence of ride comfort, providing a good ride comfort over a wide temperature range, and having an excellent durability. A solution thereto is a non-pneumatic tire ( 1 ) using a resin composition for a framework member, the resin composition having a bending modulus of elasticity at −20° C. according to ISO 178 of 1600 MPa or less, and a bending modulus of elasticity at 60° C. according to ISO 178 of 150 MPa or more.

First claim

The invention claimed is:

1. A non-pneumatic tire using a resin composition for a framework member, the resin composition having a bending modulus of elasticity at −20° C. according to ISO 178 of 1600 MPa or less, and a bending modulus of elasticity at 60° C. according to ISO 178 of 150 MPa or more, wherein the resin composition comprises a thermoplastic elastomer (A) having a hard segment and a soft segment in a molecule thereof, and a resin (B) of the same kind as the hard segment other than the thermoplastic elastomer (A).

2. The non-pneumatic tire according to claim 1 ,
wherein the thermoplastic elastomer (A) is a polyester-based thermoplastic elastomer, and the resin (B) is a polyester resin.

3. The non-pneumatic tire according to claim 2 ,
wherein the hard segment of the polyester-based thermoplastic elastomer is polybutylene terephthalate, and the polyester resin is polybutylene terephthalate.

4. The non-pneumatic tire according to claim 3 ,
wherein a mass ratio of the thermoplastic elastomer (A) to the resin (B), A/B, is 60/40 to 40/60.

5. The non-pneumatic tire according to claim 4 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

6. The non-pneumatic tire according to claim 3 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

7. The non-pneumatic tire according to claim 2 ,
wherein a mass ratio of the thermoplastic elastomer (A) to the resin (B), A/B, is 60/40 to 40/60.

8. The non-pneumatic tire according to claim 7 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

9. The non-pneumatic tire according to claim 2 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

10. The non-pneumatic tire according to claim 1 ,
wherein a mass ratio of the thermoplastic elastomer (A) to the resin (B), A/B, is 60/40 to 40/60.

11. The non-pneumatic tire according to claim 10 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

12. The non-pneumatic tire according to claim 1 , comprising:
a wheel portion to be attached to an axle;
an inner cylinder externally covering the wheel portion;
an outer cylinder surrounding the inner cylinder from an outside in a tire radial direction;
a plurality of connecting members arranged along a tire circumferential direction between the inner cylinder and the outer cylinder and connecting the inner cylinder and the outer cylinder to each other; and
a tread member provided outside the outer cylinder in the tire radial direction,
wherein the inner cylinder, the outer cylinder, and the connecting members serving as the framework member are formed of the resin composition.

Assignees

• Bridgestone Corp

Inventors

• EGUCHI Sinichi

Classifications

• B60C2001/0091

  Compositions of non-inflatable or solid tyres · CPC title

• B60C7/18

  disposed radially relative to wheel axis · CPC title

• B60C7/146

  extending substantially radially, e.g. like spokes · CPC title

• B60C2011/0025

  Modulus or tan delta · CPC title

• B60C1/00 Primary

  Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title