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pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc. It can solve the problems of reducing the cornering stiffness of steering operation and the decrease of handling stability, so as to improve ride comfort, High steering stability, the effect of maintaining steering stability

Active Publication Date: 2020-10-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the rigidity of the tread portion is reduced, the cornering rigidity (cornering power) at the time of steering operation will be reduced, and the steering stability tends to be reduced.

Method used

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Examples

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Embodiment Construction

[0026] An embodiment of the present invention will be described below with reference to the accompanying drawings. figure 1 It is a developed view of the tread portion 2 of the pneumatic tire 1 of the present embodiment, figure 2 yes figure 1 Middle A-A line sectional view. Such as figure 1 and figure 2 As shown, the pneumatic tire 1 of this embodiment has a plurality of main grooves 3 extending in the tire circumferential direction on the tread portion 2, and a plurality of land portions 4 divided by the main grooves 3, for example, a steel wire for passenger cars Radial tires.

[0027] The main grooves 3 include a pair of shoulder main grooves 5 disposed on the tread end Te side, and a pair of crown main grooves 6 disposed axially inward of the respective shoulder main grooves 5 . The land portion 4 includes a pair of shoulder ribs 7 , a pair of middle ribs 8 and a crown rib 9 . The shoulder rib 7 is arranged between the shoulder main groove 5 and the tread edge Te. ...

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Abstract

The present invention provides a pneumatic tire capable of improving the balance between handling stability and riding comfort. In this pneumatic tire, the main groove (3) includes a pair of shoulder main grooves (5) arranged on the tread end (Te) side, and the land portion (4) includes a pair of shoulder main grooves (5) arranged on the tread end (Te) side. A pair of shoulder ribs (7) between the ends (Te). The shoulder ribs (7) have a plurality of shoulder grooves (12) extending from the tread end (Te) to the axially inward side of the tire, and between the adjacent shoulder grooves (12) in the tire circumferential direction, The main groove (5) is a shoulder sipe (13) extending outward in the tire axial direction. The length (L1 ) is the length of the second region (7b) between the inner end (13i) of the shoulder sipe (13) and the inner end (12i) of the other adjacent shoulder groove (12) in the tire circumferential direction (L2) 2 to 4 times.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of improving the balance between steering stability and riding comfort. Background technique [0002] Generally, in order to improve riding comfort, the rigidity of the tread portion of a pneumatic tire is lowered so that the tread portion (tread rubber) absorbs the impact from the road surface. However, if the rigidity of the tread portion is reduced, the cornering rigidity (cornering power) at the time of steering operation is reduced, and the steering stability tends to be reduced. [0003] Conventionally, attempts have been made to provide a sipe on the tread portion of a pneumatic tire to balance ride comfort and steering stability. For example, Patent Document 1 below proposes a pneumatic tire having a shoulder groove and a shoulder sipe in a pair of shoulder ribs. [0004] 【Prior technical literature】 [0005] 【Patent Literature】 [0006] 【Patent Document 1】 [0007] Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03
CPCB60C11/0327B60C2011/0339B60C11/0306B60C2011/0341B60C11/12B60C2011/0386B60C2011/0381B60C11/04B60C11/1236B60C11/0304B60C11/0311B60C2011/039
Inventor 大泽拓也
Owner SUMITOMO RUBBER IND LTD