Tire cavity resonance restricting device and pneumatic tire
View Patent ↗A tire cavity resonance restricting device to be mounted on the inner surface of the tread portion facing to the cavity of a pneumatic tire. The tire cavity resonance restricting device includes a cross-sectional area changing member for changing the cross-sectional area of the cavity in tire meridian cross section, and an elastic fixing member in the form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion. The elastic fixing member has an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached. The non-attachment portion is greater in mass than the attachment portion.
1. A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;
a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section; and
an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
wherein the non-attachment portion of the elastic fixing member is greater in mass than the attachment portion thereof,
wherein the non-attachment portion of the elastic fixing member is greater in thickness than the attachment portion thereof.
2. A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;
a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section; and
an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
wherein the non-attachment portion of the elastic fixing member is greater in mass than the attachment portion thereof,
wherein the non-attachment portion of the elastic fixing member is greater in width than the attachment portion thereof.
3. A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising:
a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section; and
an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
wherein the non-attachment portion of the elastic fixing member is greater in mass than the attachment portion thereof,
wherein the attachment portion of the elastic fixing member has holes formed therein.
4. A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;
a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section; and
an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion,
wherein the cross-sectional area changing member attached to the elastic fixing member has through holes formed there in.
5. A tire cavity resonance restricting device according to claim 4 , wherein the holes have openings facing to the cavity.
6. A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;
a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section; and
an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
wherein a mass adjusting element is continuously provided on the non-attachment portion along the circumferential direction throughout the full length of the non-attachment portion.
7. A tire cavity resonance restricting device according to claim 6 , wherein the mass adjusting element is formed from an element having a density that is five time greater or more than an apparent density of the cross-sectional area changing member.
8. A tire cavity resonance restricting device according to any one of claims 1 - 4 and 6 , having regions formed when the tire cavity resonance restricting device is equally sectioned into thirty-six regions at given positions around a circumference of the elastic fixing member in the form of a ring along a direction of the circumference, the regions including one region having a maximum mass Ma and one region having a minimum mass Mb, a mass ratio Ma/Mb being one to ten.
9. A tire cavity resonance restricting device according to any one of claims 1 - 4 and 6 , wherein the elastic fixing member is formed from a belt-shaped band made of metal or resin.
10. A tire cavity resonance restricting device according to any one of claims 1 - 4 and 6 , wherein the cross-sectional area changing member is formed of a sponge.
11. A pneumatic tire having a tire cavity resonance restricting device according to any one of claims 1 - 4 and 6 .