A heavy duty pneumatic tire (100) is provided with a carcass ply (40) constituting the skeleton of the tire, and a belt layer (15) disposed on the outside of the carcass ply in the radial direction of the tire in a tread portion (10). The carcass ply (40) has a first curvature change portion (P1) that is a boundary between a first site (P0-P1) including a tire equatorial line (CL) and a second site (P1-P2) that is disposed on the outside of the first site in the tire width direction and on the inside in the radial direction and that has a larger cross-sectional curvature than the first site, and a second curvature change portion (P2) that is disposed on the outside of the first site in the tire width direction and on the inside of the second site in the radial direction and that has a larger cross-sectional curvature than the first site. And a second curvature change portion (P2) that is a boundary between the second portion and a third portion (P2-P3) that is disposed on the inside of the second portion in the tire radial direction and that has a smaller cross-sectional curvature than the second portion. The heavy duty pneumatic tire (100) is further provided with a cushion rubber (17a), the inner end of which in the tire width direction is positioned in the first curvature change section (P1), and which is disposed between the carcass ply (40) and the belt layer (15).
重载用充气轮胎(100)具备构成轮胎的骨架的胎体帘布层(40)和在胎面部(10)中配置于胎体帘布层的轮胎径向外侧的带束层(15)。胎体帘布层(40)具有第1曲率变化部(P1)和第2曲率变化部(P2),该第1曲率变化部(P1)是第1部位(P0‑P1)和第2部位(P1‑P2)的分界,该第1部位(P0‑P1)包含轮胎赤道线(CL),该第2部位(P1‑P2)配置于第1部位的轮胎宽度方向外侧且是径向内侧且截面的曲率比第1部位大,该第2曲率变化部(P2)是第2部位和第3部位(P2‑P3)的分界,该第3部位(P2‑P3)配置于第2部位的轮胎径向内侧且截面的曲率比第2部位小。重载用充气轮胎(100)还具备缓冲橡胶(17a),该缓冲橡胶(17a)的轮胎宽度方向内侧端位于第1曲率变化部(P1)并且该缓冲橡胶(17a)配置于胎体帘布层(40)与带束层(15)之间。
Heavy duty pneumatic tire
重载用充气轮胎
2024-08-09
Patent
Electronic Resource
Chinese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |