Large-broken-width low-flat tire

Abstract

The invention discloses a large-broken-width and low-flat tire which comprises a rim and a tire crown, tire shoulders are arranged on the two sides of the tire crown, a main groove is formed in the middle of the side, away from the rim, of the tire crown, a secondary groove is further formed in the side, away from the rim, of the tire crown, and a running face is arranged on the outer side of the tire crown; a tire crown first-section arc TR1 is arranged on one side of the middle position of the outer surface of the tire crown, a tire crown second-section arc TR2 and a tire shoulder arc TR3 are sequentially arranged at the position, away from the middle position of the tire crown, of the tire crown first-section arc TR1, and the tire shoulder arc TR3 is in an arc-shaped arch bridge design. According to the outer contour design method of the tire, stress balance of all parts of the tire shoulder is achieved, the grounding mark shape of the tire is improved, the abnormal abrasion problem of the large-broken-width and low-flat tire is reduced, the grounding mark shape of the tire can be improved, grounding pressure distribution can be optimized, and the abnormal abrasion problem of the tire can be solved according to the outer contour design method of the tire.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to a tire with a large broken width and low profile. Background technique [0002] The larger the broken width of the tire and the lower the aspect ratio, the wider the running surface (90-100% of the nominal broken width); the outline design of the existing pneumatic tires usually adopts the design of two-section arcs or three-section arcs of the crown. It is wide and has a long crown arc length. Due to the large area of ​​the shoulder area during the grounding process, the circumferential groove wall of the shoulder and the outer edge of the shoulder (the position in contact with the sidewall) are under greater force, resulting in the central part of the shoulder being lifted. Without contact with the ground, the ground pressure of the tire is unevenly distributed, causing abnormal wear of the tire. [0003] Aiming at the above problems, a tire with a large broken width and low pro...

AI Technical Summary

Problems solved by technology

[0002] The larger the broken width of the tire and the lower the aspect ratio, the wider the running surface (90-100% of the nominal broken width); the contour design of the existing pneumatic tires usually adopts the design of two-section arcs or three-section arcs of the crown. It is wide and has a long crown arc length. Due to the large area of ​​the shoulder area during the grounding process, the circumferential groove wall of the shoulder and the outer edge of the shoulder (the position in contact with the sidewall) are under greater force, resulting in the central part of the shoulder being lifted. Not in contact with the ground, uneven distribution of tire contact pressure, resulting in abnormal tire wear

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