Pneumatic tire

Abstract

A pneumatic tire simultaneously satisfying both on-ice turning performance and ice braking performance and also simultaneously satisfying both dry turning performance and dry braking performance. The pneumatic tire has a tread pattern (T) having land sections such as blocks (1) in which sipes (10) are formed. First sipes (10) are provided in a region (Ai) on the inner side, in the direction of installation of the tire on the vehicle, of a tire equator line (CL), and second sipes (20) are provided in a region (Ao) on the outer side of the tire equator line (CL). The first sipes (10) each have a recessed or projected engagement section in a cross-section parallel to the tire equator line (CL). In each second sipe (20), an inner wall surface extending in a tire width direction (WD) or in a direction inclined from the tire width direction has rows of grooves and ridges, and each row has a portion inclined in the direction where the sipe are formed.

Description

Technical field [0001] The present invention involves an inflatable tire with tire pattern, which is especially suitable for inlayless tires (tires in winter). The tire pattern forms a so -called three -dimensional knife trough pattern. Background technique [0002] In the past, for the purpose of improving the ice and snow pavement without nail -free tires, there was a structure that configured multiple knife trough patterns in various departments (central ministry, connection (Media) department, and tire shoulder.By forming such a knife slot pattern in the pattern, the edge effect, water removal effect, and condensation effect are improved. Therefore, in recent years, it has inclined to increase the number of knife trough patterns. [0003] However, when increasing the number of knife groove patterns to increase the density of the knife slot pattern, this problem will occur: Although the number of edges is increased, due to the overall rigidity of the pattern block, the tank pa...

AI Technical Summary

Problems solved by technology

[0003] However, when increasing the number of sipe lines to increase the sipe density, there will be such a problem: although the number of edges is increased, the overall The reduced rigidity of the sipe will cause excessive collapse of the sipe, which will weaken the edge effect. In addition, the ground contact area will become smaller, which will reduce the driving performance on ice and snow roads

In this sipe, since concave engaging portions are respectively provided on the outer top and the inner top, the effect of restraining the movement of the block piece in the front-rear direction is strong, and conversely, the effect of restraining its movement in the lateral direction is weak.

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