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Tire for winter

A technology for tires and treads, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of reduced edge effects, reduced handling stability, and reduced friction, and achieves excellent ice performance. performance effect

Active Publication Date: 2016-07-27
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the blocks of such winter tires, since the deformation during running is small, the edges of the end edges of the blocks cannot be sufficiently grounded on the road surface, so there is a possibility that the edge effect may be reduced.
Therefore, when driving on ice, the frictional force when the tires start to slip sharply decreases, and there is a problem that the steering stability on ice decreases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] Prototypes based on the specifications in Table 1 have figure 1 Winter tires for cars with a basic pattern size of 205 / 60R16. As Comparative Example 1, a winter tire in which pins were provided only on blocks having substantially rectangular treads was trial-manufactured. Grip performance on ice, handling stability on ice, and pin holding performance of each test tire were tested. Common specifications and test methods for each test tire are as follows.

[0077] Mounting rim: 16×6.5

[0078] Tire internal pressure: front wheel 240kPa, rear wheel 220kPa

[0079] Test vehicle: front-wheel drive vehicle (displacement 2000cc)

[0080] Tire installation position: all wheels

[0081]

[0082] The grip performance on ice of the test vehicle mounted with each test tire was evaluated according to the driver's senses. The results are represented by a score of 100 for Comparative Example 1. The larger the score, the better the grip performance on ice.

[0083]

[0084] T...

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PUM

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Abstract

Provided is a tire for winter that exhibits exceptional on-ice performance. A tire (1) for winter is provided with a stud pin or a stud pin hole (8). Blocks (20) are sectioned in a tread part (2). Each of the blocks includes a triangular block (30) having a substantially triangular tread. The tread of the triangular block (30) includes a first peak (31) having the smallest interior angle, and a first edge (41) facing the first peak (31). The center (9) of the stud pin or the hole (8) is provided in the first edge (41) side of the triangular block (30).

Description

technical field [0001] The present invention relates to winter tires having excellent performance on ice. Background technique [0002] Patent Document 1 below proposes a winter tire having blocks on which pins are arranged in a tread portion. When such a winter tire is driven on ice, the pins are driven into the icy road surface, thereby exhibiting excellent performance on ice. [0003] In order to prevent the pins from coming off, the blocks on the tread portion are made of rubber with high hardness. In order to suppress deformation during running, blocks having holes for pins generally have substantially rectangular treads. Also, the pins are press-fitted into the blocks of the holes to increase the rigidity around the holes. [0004] In the blocks of such winter tires, since the deformation during running is small, the edges of the end edges of the blocks cannot be sufficiently brought into contact with the road surface, and therefore there is a possibility that the e...

Claims

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Application Information

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IPC IPC(8): B60C11/16B60C11/03B60C11/12B60C11/13
CPCB60C11/0302B60C11/11B60C11/1218B60C11/1236B60C11/1369B60C11/1625B60C2011/0362B60C2011/0374B60C2011/1213B60C11/16
Inventor 景山尚纪
Owner SUMITOMO RUBBER IND LTD
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