Adapter for a rolling assembly and rolling assembly comprising same

Patent metadata

Field	Value
Publication number	US-10953690-B2
Application number	US-201615573745-A
Country	US
Kind code	B2
Filing date	May 3, 2016
Priority date	May 12, 2015
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Adapter for rolling assembly comprising tire and rim to provide the connection therebetween. The adapter has axially inner end with inner reinforcing element, axially outer end with outer reinforcing element, and a body. The outer reinforcing element, axially outside of bearing face (21), is a bead wire made of three layers (23, 24, 25) of metal threads and concentric. First layer (23) includes metal thread of diameter D1, 0.8≤D1≤5 mm, second layer (24) has metal thread of diameter D2, D2≤1.4×D1, and wound in a helix at angle A2, 2°≤A2≤10°, and third layer (25) has metal thread of diameter D3 and wound in a helix around second layer (24) at angle A3, 2°≤A3≤10°, and of opposite sign to A2.

First claim

The invention claimed is:

1. A rolling assembly having an axis of rotation, the rolling assembly comprising a tire having two beads, a rim having two rim bead seats, and two adapters, for each bead, the adapter being configured to provide the connection between the bead and the rim, the adapter comprising:
an axially inner end comprising an inner reinforcing element and adapted to be mounted on a rim bead seat;
an axially outer end comprising an outer reinforcing element and adapted to come into contact, via a substantially radial axially inner face, or bearing face, with a bead;
a body connecting the axially outer end to the axially inner end so as to form a single piece, and comprising at least one main reinforcement providing the connection between the outer reinforcing element and the inner reinforcing element, and comprising a substantially axial adapter seat adapted to come into contact with a bead,
wherein the outer reinforcing element is wholly axially on the outside of the bearing face, wherein the outer reinforcing element is an annular structure, referred to as a bead wire, having a mean line and comprised of a stack of at least three layers comprised of metal threads and concentric with respect to the mean line, wherein a first layer or core comprises at least one metal thread having a diameter D 1 at least equal to 0.8 mm and at most equal to 5 mm, wherein a second layer is comprised of a metal thread having a diameter D 2 at most equal to 1.4 times the diameter D 1 and wound in a helix around the core, forming, with the mean line of the bead wire, an angle A 2 at least equal to 2° and at most equal to 10°, and wherein a third layer is comprised of a metal thread having a diameter D 3 wound in a helix around the second layer, forming, with the mean line of the bead wire, an angle A 3 at least equal to 2° and at most equal to 10°, and of opposite sign to that of the angle A 2 ,
wherein the main reinforcement comprises at least one layer of mutually parallel reinforcers, each at least one layer being wound respectively around the inner reinforcing element of the axially inner end and around the outer reinforcing element of the axially outer end, and in the body, main and return portions of the at least one layer contact one another at a midpoint of the body, so as to constitute, at least at the midpoint, a radial stack of at least two reinforcing layers.

2. The rolling assembly according to claim 1 , wherein the core of the bead wire is comprised of a single metal thread.

3. The rolling assembly according to claim 1 , wherein the third layer is comprised of a metal thread having a diameter D 3 equal to the diameter D 2 .

4. The rolling assembly according to claim 1 , wherein the angles A 2 and A 3 formed respectively by the metal threads that comprise the second and third layers of the bead wire are at least equal to 3° and at most equal to 8°.

5. The rolling assembly according to claim 1 , with the second layer of the bead wire comprising, in any radial section, N 2 sections of individual threads of diameter D 2 , wherein the number N 2 of sections of individual threads of diameter D 2 is at least equal to 5.

6. The rolling assembly according to claim 1 , with the second layer of the bead wire comprising, in any radial section, N 2 sections of individual threads of diameter D 2 , and with the third layer of the bead wire comprising, in any radial section, N 3 sections of individual threads of diameter D 3 , wherein the number N 3 of sections of individual threads of diameter D 3 is at least equal to the number N 2 +6 of sections of individual threads of diameter D 2 .

7. The rolling assembly according to claim 1 , wherein the diameter D 1 of the metal thread that comprises the core of the bead wire is at least equal to 1.2 mm and at most equal to 4.5 mm.

8. The rolling assembly according to claim 1 , with the metal threads of which the first, second and third layers of the bead wire are comprised of steel and having a breaking strength Rm, wherein the breaking strength Rm of a steel thread is at least equal to 1000 MPa and at most equal to 3000 MPa.

9. The rolling assembly according to claim 1 , with the bead wire having a circular radial cross section of diameter D S , wherein the diameter D S of the circular radial cross section of the bead wire is at least equal to 4 mm and at most equal to 25 mm.

10. The rolling assembly according to claim 1 , wherein the body comprises an annular seat reinforcer radially on the inside of the adapter seat.

11. The rolling assembly according to claim 10 , wherein the annular seat reinforcer comprises a reinforcing element coated in a polymer material.

12. The rolling assembly according to claim 11 , wherein the reinforcing element of the annular seat reinforcer comprises a metallic material such as steel.

13. The rolling assembly according to claim 11 , wherein the reinforcing element of the annular seat reinforcer comprises glass fibres coated in a polymer material.

14. The rolling assembly according to claim 1 , wherein the reinforcers are mutually parallel within one and the same layer and crossed with one another from one layer to the next, and wherein each of the layers of the main reinforcement of the body comprises reinforcers which make, with a circumferential direction of the tire, an angle at least equal to 30°, and coated with a polymer material having an elastic modulus at 10% elongation at most equal to 70 MPa.

15. The rolling assembly according to claim 1 , wherein an adapter is provided for each bead of the tire.

16. The rolling assembly according to claim 1 , with the metal threads of which the first, second and third layers of the bead wire are comprised of steel and having a breaking strength Rm, wherein the breaking strength Rm of a steel thread is at least equal to 1400 MPa and at most equal to 2800 MPa.

17. The rolling assembly according to claim 1 , with the bead wire having a circular radial cross section of diameter D S , wherein the diameter D S of the circular radial cross section of the bead wire is at least equal to 6 mm and at most equal to 21 mm.

18. An adapter for a rolling assembly having an axis of rotation, the rolling assembly comprising a tire having two beads, a rim having two rim bead seats, for each bead, the adapter providing the connection between the bead and the rim, the adapter comprising:
an axially inner end comprising an inner reinforcing element and adapted to be mounted on a rim bead seat;
an axially outer end comprising an outer reinforcing element and adapted to come into contact, via a substantially radial axially inner face, or bearing face, with a bead;
a body connecting the axially outer end to the axially inner end so as to form a single piece, and comprising at least one main reinforcement providing the connection between the outer reinforcing element and the inner reinforcing element, and comprising a substantially axial adapter seat adapted to come into contact with a bead,
wherein the outer reinforcing element is wholly axially on the outside of the bearing face, wherein the outer reinforcing element is an annular structure, referred to as a bead wire, having a mean line and comprised of a stack of at least three layers comprised of metal threads and concentric with respect to the mean line, wherein a first layer or core comprises at least one metal thread having a diameter D 1 at least equal to 0.8 mm and at most equal to 5 mm, wherein a second layer is comprised of a metal thread having a diameter D 2 at most equal to 1.4 times the diamete

Assignees

• Michelin & Cie

Inventors

• Barguet Henri
• Topin Arthur
• Ahouanto Michel

Classifications

• B60B25/10

  Seat rings for the tyre bead part, e.g. split · CPC title

• B60B21/10

  characterised by the form of tyre-seat or flange, e.g. corrugated (B60B21/02 takes precedence) · CPC title

• B60B21/02

  characterised by transverse section · CPC title

• B60B21/12

  Appurtenances, e.g. lining bands · CPC title

• B60C15/0209

  Supplementary means for securing the bead · CPC title