Pneumatic tire
A pneumatic tire includes: an annular-shaped tread portion extending in a tire circumferential direction; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions; wherein a band-like sound absorbing member is adhered on an inner surface of the tread portion in the tire circumferential direction; and a plurality of cuts with an angle θ with regard to the tire circumferential direction within a range of 40°≤θ≤90° are formed on both end portions in a lateral direction of the band-like sound absorbing member, and the cuts are connected only to one end portion in the lateral direction of the band-like sound absorbing member.
1. A pneumatic tire, comprising:
an annular-shaped tread portion extending in a tire circumferential direction;
a pair of sidewall portions disposed on both sides of the tread portion; and
a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions; wherein
a band-like sound absorbing member is adhered on an inner surface of the tread portion in the tire circumferential direction;
a plurality of cuts with an angle θ with regard to the tire circumferential direction within a range of 40°≤θ≤90° are formed on both end portions in a lateral direction of the band-like sound absorbing member, and the cuts are connected only to one end portion in the lateral direction of the band-like sound absorbing member;
the cuts are in a closed state and are configured to open during deformation of the pneumatic tire;
a depth d of the cuts is 50% or more and less than 100% with regard to a thickness D of the band-like sound absorbing member; and
the cuts are not formed in a surface of the sound absorbing member adhered to the inner surface of the tread portion.
2. The pneumatic tire according to claim 1 , wherein the band-like sound absorbing member has a missing portion in at least one section in the tire circumferential direction.
3. The pneumatic tire according to claim 1 , wherein a width a of the cuts of the band-like sound absorbing member is 5% to 25% with regard to a width A of the band-like sound absorbing member.
4. The pneumatic tire according to claim 3 , wherein a depth d of the cuts is 50% or more with regard to a thickness D of the band-like sound absorbing member.
5. The pneumatic tire according to claim 4 , wherein a volume of the band-like sound absorbing member is 10% to 30% with regard to luminal volume of the tire.
6. The pneumatic tire according to claim 5 , wherein the band-like sound absorbing member has a missing portion in at least one section in the tire circumferential direction.
7. The pneumatic tire according to claim 3 , wherein the band-like sound absorbing member has a missing portion in at least one section in the tire circumferential direction.
8. The pneumatic tire according to claim 3 , wherein a volume of the band-like sound absorbing member is 10% to 30% with regard to luminal volume of the tire.
9. The pneumatic tire according to claim 8 , wherein the band-like sound absorbing member has a missing portion in at least one section in the tire circumferential direction.
10. The pneumatic tire according to claim 1 , wherein a volume of the band-like sound absorbing member is 10% to 30% with regard to luminal volume of the tire.
11. The pneumatic tire according to claim 10 , wherein the band-like sound absorbing member has a missing portion in at least one section in the tire circumferential direction.