KR20170092267A

KR20170092267A - Pneumatic Tire for Mud Terrain

Info

Publication number: KR20170092267A
Application number: KR1020160013394A
Authority: KR
Inventors: 김호석
Original assignee: 금호타이어 주식회사
Priority date: 2016-02-03
Filing date: 2016-02-03
Publication date: 2017-08-11
Also published as: KR101950554B1

Abstract

The present invention is suitable for running on a rough road such as a muddy road and has a plurality of decorations on the bottom surface of a groove to facilitate the discharge of foreign matter and improve the durability of the bottom surface of the groove, The present invention relates to a pneumatic tire for a vehicle,
A pneumatic tire for MT in which a pattern block (20) is formed to be larger than a tire for a passenger car and a groove (25) is formed to be wider on a rough road, The decor 10 has a linear portion 11 formed in the longitudinal direction of the groove 25 and an inclined portion 12 inclined at an angle with respect to the longitudinal direction of the groove 25, And a connection part 13 formed by connecting the part 11 and the inclined part 12.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pneumatic tire for MT,

The present invention relates to a pneumatic tire for MT suitable for running on a rough road such as a muddy road, and more particularly, to provide a tire having a plurality of decors on the bottom surface of a groove to facilitate foreign matter discharge and improve durability of the bottom surface of the groove, The present invention relates to a pneumatic tire for MT, which can easily discharge foreign matter.

Generally, off-road tires suitable for off-road roads are divided into AT (All Terrain) tires and MT (Mud Terrain) tires depending on the driving environment. AT tires are tires that are thicker than tires for general passenger cars so that they can be used for asphalt pavement as well as for rough driving. MT tires are off-road tires with a large pattern block and a wide groove bottom . Although such MT tires have excellent frequency capability in rough roads, they are suitable for use in mountaineering since they have a disadvantage in that the riding feeling and the braking force on roads are low due to the rough and rigid structure.

The reason why the pattern block is enlarged in the MT tire and the bottom surface of the groove is formed to be wide is that the foreign object is easily discharged when the foreign substance is caught between the blocks of the tire while improving the gripping force of the tire, .

However, since the size of the pattern block of a typical MT tire is large, foreign substances such as clay, sand and gravel trapped in the groove are not smoothly discharged, and the thickness of the groove portion is thinner than the thickness of the pattern block portion, There is a problem in that the bottom surface of the cover can be easily damaged.

Meanwhile, as a result of investigation of the prior art related to the present invention, a large number of patent documents have been searched and some of them will be described as follows.

Patent Literature 1 discloses a structure in which a stone interposition earth which prevents a groove formed in a tread from being stuck is formed into a spiral so that a stone interposition earth moves in a spiral direction in accordance with the bending of a tread portion according to the running of a vehicle, And the stuck-at-rest zone pushes out the stones inserted in the grooves to allow the stone stuck in the grooves to escape, thereby reducing cracks and growth in the tires.

Patent Document 2 discloses a tire comprising a plurality of blocks formed along an outer circumferential surface of a tire, a plurality of longitudinal grooves partitioning the block along the running direction of the tire, and a groove protrusion formed at regular intervals along both sides of the longitudinal groove This makes it possible to prevent breakage of the tread by preventing small stones or foreign matter from being caught in the grooves during traveling and to allow water to be blown off by the sharp portions of the groove projections and to be easily discharged to the side surfaces of the groove grooves, And the tread of the tire is improved so that the adjustment stability can be improved and the reliability of the product can be improved.

Patent Document 3 discloses that a vortex generating device is provided not only on the bottom of the groove but also on both side walls, the vortex generating device being formed in a mountain shape having a height of 3 mm or less and a long length in the groove direction, , And the critical speed at which the hydroplaning phenomenon occurs is increased, and the drainage performance is improved.

KR 10-2002-0003022 A KR 10-0778935 B1 KR 10-0812049 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the conventional art, and it is an object of the present invention to provide a golf club having a plurality of decors on the bottom surface of a groove, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pneumatic tire for MT which can easily discharge foreign matter.

In order to achieve the above object, the present invention provides a pneumatic tire for MT in which a pattern block is formed larger than a tire for a passenger car and a groove is formed to be wider on a rough road, The decor is formed by a straight portion formed in the longitudinal direction of the groove, an inclined portion inclined at an angle with respect to the longitudinal direction of the groove, and a connecting portion formed by connecting the straight portion and the inclined portion.

According to the pneumatic tire for MT according to the present invention, the connection portion is thickest and thinner toward the end of the straight portion and the inclined portion, and has a tilt in the longitudinal direction.

According to the pneumatic tire for MT according to the present invention, the outer surface is formed as an inclined surface, and the width of the deco becomes narrower toward the upper side. The inclined surface of the connecting portion has a trapezoidal shape, And the inclined surface of the inclined portion has the widest width at the connection portion and zero width at the end portion.

According to the pneumatic tire for MT of the present invention, which is easy to discharge foreign matter, the decor is arranged in pairs so that straight portions are positioned on both side walls of the groove, and are arranged in a zigzag shape along the width direction of the groove .

Further, according to the pneumatic tire for MT of the present invention, which is easy to discharge foreign matter, the decoy is disposed at intervals of 1 mm when disposed along the longitudinal direction of the groove, and the maximum height of the decoy is 1 mm .

The MT tire of the present invention, which is easy to discharge foreign matter, has a structure in which a certain shape of decors are continuously arranged in a relatively thin groove so that the tire moves in a different form from that of the pattern block and the groove, So that it is possible to prevent foreign objects such as dust and the like from being quickly discharged and to prevent the groove from being damaged by a sharp object.

According to the pneumatic tire for MT of the present invention, the deco is formed to be inclined in the longitudinal direction and the outer side of the deco is formed as an inclined surface, so that the foreign matter is smoothly discharged.

In addition, according to the pneumatic tire for MT according to the present invention, since the pair of decors having the straight line portion and the inclined portion are arranged in pairs, the directionality is not given to the tire, so that the mounting direction is not limited.

1 is a reference diagram showing a typical tire for MT;
BACKGROUND OF THE INVENTION Field of the Invention [0001]
3 is a plan view of a decoy which is a main part of the present invention;
4 is a side view of a decoy which is a main part of the present invention.
5 is a sectional view taken along the line AA 'of FIG. 3;
6 is a reference view showing an arrangement of decors which is a main part of the present invention.

Hereinafter, a pneumatic tire for MT of the present invention, which facilitates the discharge of foreign matter, will be described with reference to the accompanying drawings.

As shown in FIGS. 2 to 5, the pneumatic tire for MT according to the present invention has a larger pattern block 20 than a tire for a passenger car, and the groove 25 is formed wider And the decorations 10 having a predetermined height are continuously arranged on the bottom surface of the groove 25. As shown in FIG.

The decor 10 includes a straight portion 11 formed in the longitudinal direction of the groove 25 and an inclined portion 12 inclined at a predetermined angle with respect to the longitudinal direction of the groove 25, And a connecting portion 13 connected to the inclined portion 12. 4, the connection portion 13 is thickest and thinner toward the end portions of the rectilinear section 11 and the inclined section 12, and is formed to have a slope in the longitudinal direction.

Since the decor 10 is formed in a three-dimensional shape and the groove 25 is exposed between the straight portion 11 and the inclined portion 12 of the deco 10, The portions where the decor 10 is formed move differently from the pattern blocks 20 and the grooves 25 when the respective parts of the tire are deformed and thereby the foreign substances such as soil, Is rapidly discharged. A portion of the groove 25 protruding from the bottom surface of the groove 25 is first brought into contact with a sharp object penetrating into the groove 25 so that the end of the sharp object pierces the bottom of the groove 25, It is possible to prevent damage.

Also, the outer surface of the decor 10 is formed of the inclined surfaces 11 ', 12', 13 ', and the width of the decor 10 becomes narrower toward the upper side. The inclined surface 13 'of the connection portion 13 has a trapezoidal shape and the inclined surface 11' of the linear portion 11 and the inclined surface 12 'of the inclined portion 12 are connected to each other The width is the widest and the width is 0 (zero) at the end portion.

For example, when the total length of the decor 10 is 7.7 mm, the maximum width of the decor 10 from the end of the straight line portion 11 to the end of the inclined portion 12 is 8 mm. The connecting portion 13 is formed to have a bottom width of 3 mm and an upper width of 2 mm. The maximum width of the linear portion 11 is 2.3 mm, the maximum width of the inclined portion 12 is 2.6 mm, and the maximum height of the decor 10 is 1 mm.

As described above, since the rectilinear portion, the inclined portion, and the connecting portion, which form the decor, are formed as inclined surfaces and the upper surfaces thereof are also formed as inclined surfaces, foreign substances can be discharged more easily.

6, the decor 10 is arranged in pairs so that the linear portions 11 are positioned on both side walls of the groove 25, and the decor 20 is formed in a zigzag shape along the width direction of the groove 25 . At this time, the decor 10 is preferably arranged at intervals of 1 mm along the longitudinal direction of the groove 25.

The pneumatic tire for MT according to the present invention having the above-described structure of the present invention has a larger pattern block and a wider groove than a tire for a passenger car so as to be suitable for rough running, Deco shapes of the three-dimensional shape are successively arranged in the grooves having a thin thickness from the top of the layer, so that the deco parts of the tire are moved differently from the pattern blocks and grooves, and foreign substances such as soil, sand and gravel, To be discharged. In addition, the deco of the three-dimensional shape prevents the grooves from being damaged by sharp foreign substances during the rough running.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be appreciated by those of ordinary skill in the art that numerous changes and modifications can be made to the invention without departing from the spirit and scope of the invention. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

10 ... Deco
11 ... straight portion
12 ... inclined portion
13 ... connection
11 ', 12', 13 '... inclined surfaces
20 ... pattern block
25 ... groove

Claims

A pneumatic tire for MT wherein a pattern block (20) is formed larger than a tire for a passenger car and a groove (25) is formed wider than the tire for a passenger car,
Deco (10) having a predetermined height is continuously arranged on the bottom surface of the groove (25)
The decor 10 includes a linear portion 11 formed in the longitudinal direction of the groove 25 and an inclined portion 12 inclined at an angle with respect to the longitudinal direction of the groove 25, And a connecting portion (13) formed by connecting the connecting portion (12) to the connecting portion (13).

The method according to claim 1,
The deco (10) is thickest at the connecting portion (13) and thinner toward the end portions of the rectilinear section (11) and the inclined section (12), and has a tilt in the longitudinal direction. Pneumatic tire.

The method according to claim 1,
The outer surface of the decor 10 is formed of the inclined surfaces 11 ', 12', and 13 '
The inclined surface 13 'of the connecting portion 13 has a trapezoidal shape,
The inclined surface 11 'of the linear portion 11 and the inclined surface 12' of the inclined portion 12 have the widest width at the connection portion and zero width at the end portion. Easy pneumatic tire for MT.

The method according to claim 1,
Characterized in that the decor (10) is arranged in pairs so as to position the straight line portions (11) on both side walls of the groove, and is arranged in a zigzag shape along the width direction of the groove. tire.

5. The method according to any one of claims 1 to 4,
The decor 10 is arranged at intervals of 1 mm along the longitudinal direction of the groove 25,
Wherein the maximum height of the decoy (10) is 1 mm.