Multi air chamber tire
A multi air chamber tire 1 includes a tread portion 4 , a pair of bead portions 2 , a pair of sidewall portions 3 , and partition walls 30 respectively provided to half portions of a tire which are defined with respect to a tire equator plane, the partition walls 30 partitioning an inner cavity of the tire to form a plurality of air chambers disposed adjacent to each other. Each of the partition walls 30 includes a first coupling portion 9 a and a second coupling portion 9 b coupled with a tire inner wall surface. When the tire 1 is filled with fluid, a first air chamber 20 is formed in a space inward of the partition walls 30 in a tire width direction, and a second air chamber 21 is formed in each space between a partition wall 30 and the tire inner wall surface of a sidewall portion 3.
1. A multi air chamber tire comprising:
a tread portion;
a pair of bead portions;
a pair of sidewall portions extending between the tread portion and the pair of bead portions; and
partition walls respectively provided to half portions of a tire which are defined with respect to a tire equator plane, the partition walls partitioning an inner cavity of the tire to form a plurality of air chambers disposed adjacent to each other, wherein
each of the partition walls includes a first coupling portion coupled with a tire inner wall surface, and a second coupling portion coupled with the tire inner wall surface at a position outward of the first coupling portion in a tire radial direction,
in a state where the tire is filled with fluid, a first air chamber is formed in a space located at a position inward of the partition walls in a tire width direction, and a second air chamber is formed in each space located between a partition wall of the partition walls and the tire inner wall surface of a sidewall portion of the pair of sidewall portions, and
in each partition wall, the second coupling portion is coupled with the tire inner wall surface at a position outward of a respective ground contact edge of the tread portion in the tire width direction and inward of a respective maximum width position of a belt provided in the tread portion in the tire width direction by 10% to 20% of a maximum width of the belt.
2. The multi air chamber tire according to claim 1 , wherein
each of the partition walls is a member which constrains expansion and deformation.
3. The multi air chamber tire according to claim 1 , wherein
each of the pair of bead portions includes a bead core, and
in each partition wall, the first coupling portion is coupled with the tire inner wall surface at a position outward of the respective bead core in the tire radial direction.
4. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber.
5. The multi air chamber tire according to claim 4 , wherein
in each second air chamber, the ventilation member is disposed at a position where the ventilation member penetrates through the sidewall portion of the pair of sidewall portions.
6. The multi air chamber tire according to claim 4 , wherein in each second air chamber, the ventilation member is disposed at a position where the ventilation member penetrates through the partition wall of the partition walls.
7. The multi air chamber tire according to claim 4 , further comprising in each second air chamber a second ventilation member configured to allow ventilation to the second air chamber, wherein in each second air chamber, the ventilation member is disposed at a position where the ventilation member penetrates through the sidewall portion of the pair of sidewall portions, and in each second air chamber, the second ventilation member is disposed at a position where the ventilation member penetrates through the partition wall of the partition walls.
8. The multi air chamber tire according to claim 1 , wherein
each of the partition walls is a member which constrains expansion and deformation,
each of the pair of bead portions includes a bead core, and
in each partition wall, the first coupling portion is coupled with the tire inner wall surface at a position outward of the respective bead core in the tire radial direction.
9. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber, wherein
each of the partition walls is a member which constrains expansion and deformation.
10. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber, wherein
each of the pair of bead portions includes a bead core, and
in each partition wall, the first coupling portion is coupled with the tire inner wall surface at a position outward of the respective bead core in the tire radial direction.
11. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber, wherein
each of the partition walls is a member which constrains expansion and deformation,
each of the pair of bead portions includes a bead core, and
in each partition wall, the first coupling portion is coupled with the tire inner wall surface at a position outward of the respective bead core in the tire radial direction.
12. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber and a second ventilation member configured to allow ventilation to the second air chamber, wherein
each of the partition walls is a member which constrains expansion and deformation,
in each second air chamber, the ventilation member is disposed at a position where the ventilation member penetrates through the sidewall portion of the pair of sidewall portions, and
in each second air chamber, the second ventilation member is disposed at a position where the ventilation member penetrates through the partition wall of the partition walls.
13. The multi air chamber tire according to claim 1 , further comprising, in each second air chamber, a ventilation member configured to allow ventilation to the second air chamber and a second ventilation member configured to allow ventilation to the second air chamber, wherein
each of the pair of bead portions includes a bead core,
in each partition wall, the first coupling portion is coupled with the tire inner wall surface at a position outward of the respective bead core in the tire radial direction,
in each second air chamber, the ventilation member is disposed at a position where the ventilation member penetrates through the sidewall portion of the pair of sidewall portions, and
in each second air chamber, the second ventilation member is disposed at a position where the ventilation member penetrates through the partition wall of the partition walls.