HEAVY LOAD TIRE AND MANUFACTURING METHOD OF HEAVY LOAD TIRE

• Main Author: MAEHARA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 16.08.2018
• Subjects: DEVICES OR ARRANGEMENTS RELATED TO TYRES; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To improve center wear resistant performance under a service condition of a light load.SOLUTION: In a tire meridian cross section in a 5% internal pressure state, the contour line of a surface of a tread part 2 is composed of a circular arc part J1 in a radius of curvature R1 and a circular arc part J2 except for a radius of curvature R2 of crossing at an inflection point P with this. The radius of curvature R2 is smaller than the radius of curvature R1. The inflection point P is positioned on a middle land part 11m. A distance Lp up to the inflection point P from a tire equator C is 0.35-0.50 time of a tread half width Wt.SELECTED DRAWING: Figure 2 【課題】 軽荷重の使用条件下における耐センター摩耗性能を向上させる。【解決手段】 ５％内圧状態におけるタイヤ子午断面において、トレッド部２の表面の輪郭線は、曲率半径Ｒ１の内の円弧部Ｊ１と、これに変曲点Ｐで交わる曲率半径Ｒ２の外の円弧部Ｊ２とからなる。曲率半径Ｒ２は、曲率半径Ｒ１より小な。変曲点Ｐは、ミドル陸部１１ｍ上に位置する。タイヤ赤道Ｃから変曲点Ｐまでの距離Ｌｐは、トレッド半幅Ｗｔの０．３５〜０．５０倍である。【選択図】図２