PNEUMATIC TIRE

• Main Author: MURATA NAOHISA
• Format: Patent
• Language: English; Japanese
• Published: 07.12.2017
• Subjects: DEVICES OR ARRANGEMENTS RELATED TO TYRES; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a pneumatic tire that can improve noise performance and wet performance while maintaining steering stability.SOLUTION: In the pneumatic tire, a center block 20 and a shoulder block 21 are partitioned by a circumferential groove 10 extending in a tire circumferential direction, a plurality of inner inclining grooves 11 communicating with the circumferential groove 10 while inclining in one direction with respect to the tire circumferential direction and a plurality of outer inclining grooves 12 communicating with the inner inclining grooves 11 while inclining in the other direction with respect to the tire circumferential direction, and pitch of repetitive elements constituted of the grooves and the blocks is varied along the tire circumferential direction. The circumferential groove 10 is constituted of a plurality of widened parts 10A and a plurality of narrowed parts 10B arranged alternately in the tire circumferential direction, the inner inclining grooves 11 are communicated with the widened parts 10A, and inclination angles θ which is formed by a virtual line L through which centers of opening ends of a pair of inner inclining grooves 11 and 11 communicating with each widened part 10A are joined to each other are set smaller as the pitch of the repetitive elements is smaller.SELECTED DRAWING: Figure 3 【課題】操縦安定性能を維持しながら、騒音性能及びウェット性能を向上することを可能にした空気入りタイヤを提供する。【解決手段】タイヤ周方向に延びる周方向溝１０と、タイヤ周方向に対して一方向に傾斜しながら周方向溝１０に連通する複数本の内側傾斜溝１１と、タイヤ周方向に対して他方向に傾斜しながら内側傾斜溝１１に連通する複数本の外側傾斜溝１２とによってセンターブロック２０およびショルダーブロック２１が区画されて、これら溝およびブロックからなる繰り返し要素のピッチがタイヤ周方向に沿って変動している空気入りタイヤにおいて、周方向溝１０をタイヤ周方向に交互に配置された複数の拡幅部１０Ａと複数の狭幅部１０Ｂとで構成し、内側傾斜溝１１を拡幅部１０Ａに対して連通させて、各拡幅部１０Ａに連通する一対の内側傾斜溝１１，１１の開口端の中心どうしを結ぶ仮想直線Ｌがタイヤ周方向に対してなす傾斜角度θを繰り返し要素のピッチが小さいほど小さくする。【選択図】図３