Pneumatic tire

Abstract

Provided is a pneumatic tire which can fundamentally prevent the phenomenon in which cracks are generated in the bottoms of grooves and the areas where the side walls of blocks meet the bottoms of grooves, can suppress irregular abrasion of the tread, can enhance the overall rigidity of the tread, and can also enhance the drainage performance. The pneumatic tire of the invention includes a tread, side walls and bead sections, with a large number of blocks compartmentalized by grooves being formed on the surface of the tread, and also includes reinforcing ribs that are positioned inside a groove and have their lower parts joined with the bottom of the groove, with one lateral surface of a reinforcing rib and one side wall of the groove being in contact.

Claims

1. A pneumatic tire comprising a tread, side walls and bead sections, and having a number of blocks that are compartmentalized by grooves formed on a surface of the tread, wherein the pneumatic tire further comprises: reinforcing ribs that are positioned inside a groove and have their lower parts joined with a bottom of the groove; wherein one lateral surface of each reinforcing rib and part of one side wall of the groove are formed in a jagged form in a radial direction to a center of the pneumatic tire and are formed as a cuff section by interdigitating with each other; wherein a centerline of each reinforcing rib has a structure that is offset from one sidewall of the groove; wherein the reinforcing ribs that are positioned inside the groove are spaced apart from each other at a certain interval along a circumferential direction of the pneumatic tire; and wherein an area where the cuff section of each reinforcing rib and the cuff section of the groove are joined is subjected to rounding.

2. The pneumatic tire according to claim 1, wherein a height of each reinforcing rib is 80% to 90% relative to a height of the groove.

3. The pneumatic tire according to claim 1, wherein a width of each reinforcing rib is 30% to 70% relative to a width of the groove.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a cross-sectional diagram illustrating the pneumatic tire according to an embodiment of the present invention.

(2) FIG. 2 is a plan view diagram illustrating the pneumatic tire according to an embodiment of the present invention.

(3) FIG. 3 is a cross-sectional diagram illustrating the reinforcing ribs and a block in the pneumatic tire according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(4) Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those having ordinary skill in the art to which the present invention is pertained can easily carry out the invention. However, the present invention can be realized in various different forms, and is not intended to be limited to the Examples that will be described herein. For similar members described throughout the entire specification, the same reference symbols will be assigned.

(5) FIG. 1 is a cross-sectional diagram illustrating the pneumatic tire according to the present invention, and FIG. 2 is a plan view diagram illustrating the pneumatic tire according to the present invention. FIG. 3 is a cross-sectional diagram illustrating the reinforcing ribs and blocks in the pneumatic tire according to the present invention.

(6) According to FIG. 1 to FIG. 3, the pneumatic tire (1) according to the present invention is configured to include a tread (10), a side wall (30), and bead sections. The pneumatic tire has a number of blocks (102) that are compartmentalized by grooves (101) formed on the surface of the tread (10), and includes reinforcing ribs (20) that are positioned inside the grooves (101).

(7) Furthermore, the pneumatic tire (1) according to the present invention further includes a carcass (40), a belt (50), and a rim (not shown in the diagram).

(8) Since the bead sections (not shown in the diagram), carcass (40), belt (50) and rim (not shown in the diagram) are the same as the corresponding members in the configuration of a general pneumatic tire, specific explanations will not be repeated. In the following, descriptions will be given with an emphasis on the reinforcing ribs (20) only.

(9) The reinforcing ribs (20) have their lower parts joined with the bottom of a groove (101). At this time, one lateral surface of a reinforcing rib (20) is in contact with one side wall of the groove (101). The reinforcing ribs (20) basically prevent any foreign materials such as pebbles from penetrating into the inside of the groove (101), and thus can guarantee the original service life of the tire. Specifically, the reinforcing ribs (20) are formed such that the height of a reinforcing rib is 80% to 90% relative to the height of the groove (101), and the width of the reinforcing rib is 30% to 70% relative to the width of the groove (101). Therefore, foreign materials such as relatively large stones or pebbles can be prevented from penetrating into the groove (101).

(10) Accordingly, the occurrence of cracks at the bottom of the groove (101) and the area where the bottom of the groove (101) meets the side wall of the groove (101), where cracks are generated intensively, can be fundamentally prevented.

(11) In addition, the reinforcing ribs (20) can suppress irregular abrasion of the tread (10).

(12) More specifically, since the reinforcing ribs (20) are engaged with one side wall of the groove (101), the reinforcing ribs can absorb the braking force, and thereby induces a driving force in the block (102), so that uniform abrasion can be induced.

(13) Furthermore, the center line (CL) of the reinforcing ribs (20) has a structure that is offset from one side wall of the groove (101). Therefore, the engagement force of the reinforcing ribs (20) and the block (102) can be further increased.

(14) Furthermore, at the surfaces where the reinforcing ribs (20) and the groove (101) are contacted, cuff sections (20a and 101a) are respectively formed. The cuff sections (20a and 101a) are formed in a jagged form and are interdigitated. These cuff sections (20a and 101a) are engaged with each other when relative movement occurs between the block (102) and the reinforcing ribs (20), and thereby enhance the overall rigidity of the tread (10).

(15) At this time, in the area where the cuff section (20a) of the reinforcing rib (20) and the cuff section (101a) of the groove (101) are joined, the cuff sections are perpendicularly disposed, tearing caused by stress concentration, chip cut, and abnormal abrasion of other grooves (101) may occur in the early stage. Therefore, in order to prevent this, the area where the cuff section (20a) of the reinforcing rib (20) and the cuff section (101a) of the groove (101) are joined is subjected to rounding.

(16) Such reinforcing ribs (20) are separated at a certain interval along the circumferential direction.

(17) That is, the reinforcing ribs (20) are formed at a certain interval along the circumferential direction, so that in the case where the vehicle runs on a wet road surface or runs in wet weather, water on a wet road or rain water can be made to be efficiently drained through the empty spaces formed between the grooves (101) and the reinforcing ribs (20).

(18) Preferred embodiments of the present invention have been described in detail, but the scope of rights of the present invention is not intended to be limited to these, and various modifications and improvements made by a person having ordinary skill in the art utilizing the basic concept of the present invention defined in the following claims are construed to be included in the scope of rights of the present invention.

REFERENCE SYMBOLS

(19) 10: TREAD 101: GROOVE 101a, 20a: CUFF SECTION 102: BLOCK 20: REINFORCING RIB 30: SIDE WALL 40: CARCASS 50: BELT