Non-pneumatic resilient wheel

Patent metadata

Field	Value
Publication number	US-11267287-B2
Application number	US-201716337106-A
Country	US
Kind code	B2
Filing date	Sep 25, 2017
Priority date	Sep 27, 2016
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A non-pneumatic elastic wheel (30) defining three perpendicular directions, circumferential (X), axial (Y) and radial (Z), comprises at least: —a hub (31), for example made of metal; an annular band referred to as a shear band (32) oriented in the circumferential direction (X), surmounted by a tread (33); and a plurality of support elements (34) connecting the hub (31) to the annular shear band (32). The annular shear band (32) is formed by a laminate comprising at least one layer of silicone rubber, in particular of the high temperature crosslinking type, such as, for example, a silicone rubber of VMQ or PVMQ grade, the said layer being sandwiched between two layers of fibre-resin composite comprising filaments of an inorganic substance, in particular glass, embedded in a thermoset resin such as, for example, a vinyl ester resin.

First claim

The invention claimed is:

1. A non-pneumatic elastic wheel defining three perpendicular directions, the perpendicular directions being circumferential X, axial Y and radial Z, the wheel comprising:
a hub;
an annular shear band oriented in the circumferential direction X, surmounted by a tread; and
a plurality of support elements connecting the hub to the annular shear band,
wherein the annular shear band is formed by a laminate comprising at least one silicone rubber layer sandwiched between two fiber-resin composite layers comprising glass filaments embedded in a thermoset resin, and
wherein the silicone rubber layer and the fiber-resin composite layers are joined together by at least one adhesion primer.

2. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber layer has a thickness T 1 which is greater than the thickness T 2 of each fiber-resin composite layer.

3. The non-pneumatic elastic wheel according to claim 2 , wherein the silicone rubber layer has a thickness T 1 of between 1.5 and 3 times the thickness T 2 of each fiber-resin composite layer.

4. The non-pneumatic elastic wheel according to claim 1 , wherein T 1 is between 1 and 3 mm.

5. The non-pneumatic elastic wheel according to claim 4 , wherein T 1 is between 1.5 and 2.5 mm.

6. The non-pneumatic elastic wheel according to claim 1 , wherein T 2 is between 0.25 and 2 mm.

7. The non-pneumatic elastic wheel according to claim 6 , wherein T 2 is between 0.5 and 1.5 mm.

8. The non-pneumatic elastic wheel according to claim 1 comprising at least two layers of silicone rubber and three layers of fiber-resin composite.

9. The non-pneumatic elastic wheel according to claim 1 , wherein the adhesion primer is based on an organosilane or organopolysiloxane.

10. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is less than 5 MPa.

11. The non-pneumatic elastic wheel according to claim 10 , wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is between 1 and 5 MPa.

12. The non-pneumatic elastic wheel according to claim 11 , wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is between 1 and 3 MPa.

13. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 350%.

14. The non-pneumatic elastic wheel according to claim 13 , wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 400%.

15. The non-pneumatic elastic wheel according to claim 14 , wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 450%.

16. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber is of the high temperature crosslinking type.

17. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber is of a grade selected from the group consisting of MQ, FMQ, PMQ, VMQ, PVMQ and FVMQ.

18. The non-pneumatic elastic wheel according to claim 17 , wherein the silicone rubber is of VMQ or PVMQ grade.

19. The non-pneumatic elastic wheel according to claim 18 , wherein the silicone rubber is of PVMQ grade.

20. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber exhibits a glass transition temperature Tg 1 which is less than −100° C.

21. The non-pneumatic elastic wheel according to claim 20 , wherein the silicone rubber exhibits a glass transition temperature Tg 1 which is less than −110° C.

22. The non-pneumatic elastic wheel according to claim 20 , wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation ASM10, measured at −100° C., which is less than 30 MPa.

23. The non-pneumatic elastic wheel according to claim 22 , wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation ASM10, measured at −100° C., which is less than 20 MPa.

24. The non-pneumatic elastic wheel according to claim 20 , wherein the silicone rubber exhibits an elongation at break Et, measured at −100° C., which is greater than 100%.

25. The non-pneumatic elastic wheel according to claim 24 , wherein the silicone rubber exhibits an elongation at break Et, measured at −100° C., which is greater than 150%.

26. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber is a composition based on silicone rubber and on at least one additive.

27. The non-pneumatic elastic wheel according to claim 26 , wherein the additive is a crosslinking agent.

28. The non-pneumatic elastic wheel according to claim 27 , wherein the additive is an organic peroxide type crosslinking agent.

29. The non-pneumatic elastic wheel according to claim 26 , wherein the additive is a filler.

30. The non-pneumatic elastic wheel according to claim 29 , wherein the additive is a silica type filler.

31. The non-pneumatic elastic wheel according to claim 1 , wherein the glass transition temperature Tg 2 of the thermoset resin is greater than 30° C.

32. The non-pneumatic elastic wheel according to claim 31 , wherein the glass transition temperature Tg 2 of the thermoset resin is greater than 70° C.

33. The non-pneumatic elastic wheel according to claim 1 , wherein the silicone rubber layer comprises 100 phr of silicone elastomer.

Assignees

• Michelin & Cie

Inventors

• Delfino Antonio
• Berguerand Philippe
• Pozo François
• Schroeter Pascal

Classifications

• B60C9/18 Primary

  Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers · CPC title

• B60C7/102 Primary

  Tyres built-up with separate rubber parts · CPC title

• B60C9/0028

  Reinforcements comprising mineral fibres, e.g. glass or carbon fibres · CPC title

• B60C7/22

  having inlays other than for increasing resiliency, e.g. for armouring · CPC title

• B60B1/0261

  characterised by spoke form · CPC title