Tyre

A technology for tires and treads, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc., and can solve problems such as inability to fully exert the wiping effect, low ground pressure, and inability to fully improve braking performance. Achieve the effects of improving the wiping effect, increasing the ground pressure, and reducing the contact angle
CN112976954APending Publication Date: 2021-06-18SUMITOMO RUBBER IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUMITOMO RUBBER IND LTD
Publication Date
2021-06-18

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Abstract

The invention improves wiping effect and improves braking performance on icy roads. In a cross section at right angles to the longitudinal direction of a lateral groove (3), at least one wall surface (8) of the lateral groove (3) includes a serrated part (9). The serrated part (9) is formed by alternately repeating multiple first face parts (11) and second face parts (12), The first face parts (11) tilt in a direction in which groove width becomes wider to the groove bottom (13), The second face parts (12) extend substantially parallel to the tread surface (2S) from the groove bottom side end (11e) to the groove width center (j) side.
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Description

technical field

[0001] The present invention is suitable as a studless tire, and particularly relates to a tire with improved braking performance on icy roads. Background technique

[0002] For studless tires, in order to improve running performance on icy and snowy roads, etc., a pattern in which blocks defined by circumferential grooves and lateral grooves are arranged on the tread portion is widely used.

[0003] The wall surface of the lateral groove used in such a pattern is generally formed with an inclined surface inclined in a direction in which the groove width decreases toward the bottom of the groove (see, for example, Patent Document 1 below).

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 11-99810

[0005] On the other hand, on an icy road surface, a thin water film is formed by melting the ice due to the contact pressure of the tire. And, if this water film is sandwiched between the tread surface and the icy road surface, the grip force...

Claims

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