Vehicle tire assembly

Patent metadata

Field	Value
Publication number	US-11433708-B2
Application number	US-202016781442-A
Country	US
Kind code	B2
Filing date	Feb 4, 2020
Priority date	Feb 4, 2020
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A vehicle tire assembly having a plurality of flexible spoke portions that extend from an outer annular ring to and inner annular ring. Adjacent pairs of the flexible spoke portions define a plurality of gaps therebetween. A plurality of electro-active members, are disposed radially inward from the outer annular ring and radially outward of the inner ring. The plurality of electro-active members are configured such that in the absence of an electric current flowing therethrough, the plurality of electro-active members flex in response to flexing of the plurality of flexible spoke portions. In the presence of an electric current flowing through the plurality of electro-active members, the plurality of electro-active members become more rigid and less flexible adding corresponding stiffness to the plurality of flexible spoke portions.

First claim

What is claimed is:

1. A vehicle tire assembly, comprising:
an outer annular ring;
an inner ring;
a plurality of flexible spoke portions that extend from the outer annular ring to the inner ring, adjacent pairs of the flexible spoke portions defining a plurality of gaps therebetween, the outer ring, the inner ring and the plurality of flexible spoke portions defining an airless tire section; and
a plurality of electro-active members, each of the plurality of electro-active members being disposed in alternating ones of the plurality of gaps radially inward from the outer annular ring and radially outward of the inner ring, the plurality of electro-active members being configured such that in the absence of an electric current flowing therethrough, the plurality of electro-active members flex in response to flexing of the plurality of flexible spoke portions, and in the presence of an electric current flowing through the plurality of electro-active members, the plurality of electro-active members become more rigid and less flexible adding corresponding stiffness to the plurality of flexible spoke portions.

2. The vehicle tire assembly according to claim 1 , wherein
the plurality of flexible spoke portions are non-linear in an unflexed state such that the corresponding ones of the plurality of gaps therebetween have a non-linear shape.

3. The vehicle tire assembly according to claim 2 , wherein
corresponding ones of the plurality of electro-active members are disposed in corresponding ones of each of the plurality of gaps.

4. The vehicle tire assembly according to claim 2 , wherein
each of the plurality of flexible spoke portions includes a curved section and the corresponding ones of the plurality of gaps therebetween include a corresponding curved section.

5. The vehicle tire assembly according to claim 4 , wherein
corresponding ones of the plurality of electro-active members is disposed in each corresponding one of the plurality of gaps at corresponding ones of the curved sections.

6. The vehicle tire assembly according to claim 1 , further comprising
a rigid rim configured for mounting to a vehicle, the inner ring being mounted to the rigid rim, and
at least one battery disposed within the airless tire section at a location proximate to the rigid rim configured to selectively provide electric current to the plurality of electro-active members.

7. The vehicle tire assembly according to claim 6 , further comprising
the at least one battery includes a plurality of batteries disposed within the airless tire section at locations adjacent to the rigid rim spaced apart from a center of the rigid rim.

8. The vehicle tire assembly according to claim 6 , wherein
each of the plurality of electro-active members includes at least one electro-active element that is flexible in the absence of an electric current flowing therethrough and is rigid the presence of an electric current flowing therethrough.

9. The vehicle tire assembly according to claim 8 , wherein
each of the plurality of electro-active members includes a plurality of electro-active elements that are flexible in the absence of an electric current flowing therethrough and are rigid in the presence of an electric current flowing therethrough.

10. The vehicle tire assembly according to claim 6 , further comprising
an electronic controller wirelessly connected to at least one battery, the electronic controller being configured to switch on thereby supplying electric current to the plurality of electro-active members and configured to switch off thereby not supplying electric current to the plurality of electro-active members.

11. The vehicle tire assembly according to claim 6 , wherein
the rigid rim is made of metal.

12. The vehicle tire assembly according to claim 1 , wherein
the outer annular ring includes an outer tread surface.

13. The vehicle tire assembly according to claim 1 , wherein
each of the plurality of electro-active members includes at least one electro-active element that is flexible in the absence of an electric current flowing therethrough and is rigid the presence of an electric current flowing therethrough.

14. The vehicle tire assembly according to claim 1 , wherein
corresponding ones of the plurality of electro-active members are disposed in corresponding ones of each of the plurality of gaps.

15. A vehicle tire assembly, comprising:
an outer annular ring;
an inner ring;
a plurality of flexible spoke portions that extend from the outer annular ring to the inner ring, adjacent pairs of the flexible spoke portions defining a plurality of gaps therebetween, the outer ring, the inner ring and the plurality of flexible spoke portions defining an airless tire section; and
a plurality of electro-active members, each of the plurality of electro-active members are embedded within corresponding ones of the plurality of flexible spoke portions radially inward and spaced apart from the outer annular ring, radially outward and spaced apart from the inner ring, the plurality of electro-active members being configured such that in the absence of an electric current flowing therethrough, the plurality of electro-active members flex in response to flexing of the plurality of flexible spoke portions, and in the presence of an electric current flowing through the plurality of electro-active members, the plurality of electro-active members become more rigid and less flexible adding corresponding stiffness to the plurality of flexible spoke portions.

16. A vehicle tire assembly, comprising
an outer annular ring;
an inner ring;
a plurality of flexible spoke portions that extend from the outer annular ring to the inner ring, adjacent pairs of the flexible spoke portions defining a plurality of gaps therebetween, the outer ring, the inner ring and the plurality of flexible spoke portions defining an airless tire section;
air retaining sections attached to the outer annular ring and the inner ring such that the air retaining sections are inflatable; and
a plurality of electro-active members, each of the plurality of electro-active members being disposed radially inward from the outer annular ring and radially outward of the inner ring, the plurality of electro-active members being configured such that in the absence of an electric current flowing therethrough, the plurality of electro-active members flex in response to flexing of the plurality of flexible spoke portions, and in the presence of an electric current flowing through the plurality of electro-active members, the plurality of electro-active members become more rigid and less flexible adding corresponding stiffness to the plurality of flexible spoke portions.

Assignees

• Nissan North America Inc

Inventors

• Cao Jinwei
• Zhao Nanzhu

Classifications

• B60C7/146 Primary

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

• F16F15/005

  using electro- or magnetostrictive actuation means (generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00) · CPC title

• B60C7/18

  disposed radially relative to wheel axis · CPC title

• F16F2224/0283

  piezoelectric; electro- or magnetostrictive · CPC title

• B60C7/20

  disposed circumferentially relative to wheel axis · CPC title