KR20100034780A - Snow tire - Google Patents

Abstract

PURPOSE: A snow tire is provided to improve a braking force and traction power along with a steering performance on a snowy road. CONSTITUTION: A snow tire comprises a first block(B1), a second block(B2), a third block(B3), a fourth block(B4), a fifth block(B5), a first longitudinal groove(G1), a second longitudinal groove(G2), a third longitudinal groove(G3), a fourth longitudinal groove(G4), a first transversal groove(G5) and a second transversal groove(G6). The first block is formed on the center region of a thread in the tire traveling direction. The second and third blocks are respectively formed on the shoulder part of the thread in the tire width direction. The fourth and fifth blocks are respectively formed between the first and second blocks and the first and third blocks. The first transversal groove is connected with the first longitudinal groove and the third longitudinal groove.

Description

Snow tires {SNOW TIRE}

The present invention relates to a snow tire, and more particularly, to improve the braking and traction properties of the snow road and to improve the drainage performance on a slush road while reducing noise during driving on snow roads and ice roads. It relates to a snow tire with an improved tread pattern to maximize braking and traction.

In general, the tire is, as shown in FIG. 1, between a tread 101 in contact with the road surface, a carcass 102 forming the skeleton of the tire, between the tread 101 and the carcass 102. An installed liner layer 103, an inner liner 104 for preventing air leakage; Side wall (105) to protect the carcass 102 and to allow flexible flexing movement; It consists of the bead part 106 which mounts a tire to a rim. In addition, the pattern of the tread 101 is composed of a plurality of tread blocks (Block, B) and a plurality of grooves (Groove, G) formed between the plurality of tread blocks (B), respectively.

Such a tire is extruded compounding rubber mixed with various chemicals such as carbon black and sulfur, which is a kind of black pigment, to natural rubber, which is a raw material, or the compounding rubber is used as a cord or bead wire ( After completing the green tire through a molding process combining various semi-finished products cut through a rolling process topping to a bead wire or the like by a molding machine, the green tire is finally put into a vulcanization mold and subjected to high pressure and high temperature for a predetermined time. It is manufactured by carrying out a vulcanization step of adding.

Snow tires, unlike the above-described general tires, in order to improve the braking force on snow roads and ice roads in winter, stud type is installed in the tread block of the tire spikes, and the tread block is divided into a plurality of cuffs There is a studless type formed.

In the stud type snow tire, as shown in FIG. 2, a predetermined groove 201 is formed on the surface of the tread block 200 and a metal stud 202 is forcibly fitted in the groove 201. It is structure to install. By the way, this type of snow tire has excellent braking ability when driving in winter, but the road surface is easily damaged by the stud 202 made of metal when driving on a dry road, and noise and dust are generated. Rather, there is a problem in that cracks are easily generated at the inner lower end of the groove 201 by inserting and installing the metal stud 202.

On the other hand, the studless snow tire has a structure in which a plurality of cuffs 302 having a predetermined depth are formed in the tread block 300 partitioned by the groove 301, as shown in FIG. The stiffness of each portion of the tread block 300 divided by the cuff 302 is not only the same, but the rigidity of the tread block 300 divided into a deep and large number of cuffs 302 is very weak compared to other tires. As the movement of the tread block 300 divided during the driving of the abrasion phenomenon is abnormal, the snow performance is remarkably degraded according to the progress of wear on the surface of the tread block 300, and the tire has a very long service life. There was a problem of shortening. In particular, the aforementioned tireless snow tire has a good straight performance when driving on snow roads and ice roads by the plurality of cuffs 302 formed on the tread block 300, but the traction force due to the cuffs is poor when turning. The turning performance was deteriorated, which was disadvantageous in terms of noise. In addition, there is a problem that can not maintain the normal braking force and traction force due to the drainage performance is reduced on the road surface where the water is slightly thin as the temperature rises in the snow road surface or freezing road state, that is, the slush (slush) road surface.

Accordingly, the present invention has been made to solve the above-mentioned problems, while improving the braking and traction characteristics of snow road maneuverability while reducing noise while driving on snow roads and ice roads, and improving drainage performance even on slush roads. The purpose is to maximize the dynamics and traction.

The present invention to achieve the above object, the first block formed in the tire running direction on the center of the tread; Second and third blocks respectively formed in the width direction of the tire on the shoulder portion of the tread; Fourth and fifth blocks formed between the first block and the second block and between the first block and the third block, respectively; A first type groove and a second type groove in the tire traveling direction so as to partition between the first block and the fourth block and between the first block and the fifth block; A third type groove and a fourth type groove formed in the tire driving direction so as to partition between the second block and the fourth block and between the third block and the fifth block; A first branch groove formed in the width direction of the tire from the first type groove and the third type groove so as to be in communication with the first type groove and the third type groove, and to divide the second block and the fourth block into a plurality of unit blocks, respectively. 1 transverse groove; A second transverse groove formed in communication with the fourth type groove and branched from the fourth type groove in a tire width direction to divide the third block into a plurality of unit blocks; Has a tread pattern comprising a,

Each side edge of the second block and the fourth block is bent inward at a predetermined interval so that the first type groove and the third type groove are formed in a zigzag shape.

In the present invention, the fourth block and the fifth block, the first semi-groove which is formed to be inclined at a predetermined angle in the middle of the fourth block so as to communicate with the first type groove and the third type grooves; And second semi-grooves which are formed to be inclined at a predetermined angle at positions communicating with the second type grooves and the second horizontal grooves, respectively.

In the present invention, a plurality of zigzag cuffs are formed on the first block, the second block, the third block, and the fourth block, and some of the cuffs are horizontally formed in the tire width direction. , The remaining part of the cuff is characterized in that each is formed to be inclined at different angles.

In addition, in the present invention, the cuff formed in the fourth block is inclined in the same direction as the first semi groove, but inclined in the opposite direction to the cuff formed in the first block and the fifth block, the fifth block The cuff formed in the inclined in a direction different from the second semi-groove.

In addition, in the present invention, the width of the blocks are each formed of 11 to 22% of the tread width, the width of the longitudinal grooves are characterized in that each of the width of the tread width is formed 4.5 to 6.2%.

In addition, in the present invention, the first horizontal groove is connected in a curved form starting from one side of the first block to the second block through the fourth block, the second horizontal groove of the fifth block Starting from one side to the third block is characterized in that connected in a curved form.

Further, in the present invention, the first horizontal groove has a downward curved shape from the first block toward the second block, and the second horizontal groove has an upward curved shape from the fifth block toward the third block. .

According to the present invention, it is possible to improve the braking property and the traction property along with the snow maneuverability while improving the noise during driving on the snow road and the ice road, and also to improve the drainage performance on the slush road surface to maintain the braking property and the traction property better. Can be.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, Figure 4 is a plan view showing the tread pattern shape of a snow tire according to the present invention.

As shown in FIG. 4, the tread pattern structure of the snow tire of the present invention includes a plurality of longitudinal grooves G1, G2, G3, and G4 formed in the running direction (circumferential direction) of the tire, and the width direction (laterally) of the tire. Direction), a plurality of horizontal grooves G5 and G6, and a plurality of blocks B1, B2, B3, divided by the longitudinal grooves G1, G2, G3 and G4 and the horizontal grooves G5 and G6. B4, B5).

The plurality of blocks B1, B2, B3, B4, and B5 may include a first block B1 formed in the tire running direction at the center portion of the tread and a second block B2 formed in the tire width direction at the shoulder portion of the tread. ) And a third block B3, and a fourth block B4 formed between the first block B1 and the second block B2 and between the first block B1 and the third block B3, respectively. And a fifth block B5.

The plurality of longitudinal grooves G1, G2, G3, and G4 may divide tires between the first block B1 and the fourth block B4 and between the first block B1 and the fifth block B5. The first type groove G1 and the second type groove G2 formed in the driving direction, between the second block B2 and the fourth block B4, and the third block B3 and the fifth block ( B5) is composed of a third type groove G3 and a fourth type groove G4 respectively formed in the tire traveling direction so as to be partitioned therebetween.

The plurality of horizontal grooves G5 and G6 communicate with the first type groove G1 and the third type groove G3, and the plurality of second blocks B2 and the fourth block B4, respectively. A first horizontal groove (G5) and a fourth horizontal groove (G4) formed by branching from the first type groove (G1) and the third type groove (G3) in the tire width direction so as to be divided into unit blocks of The second horizontal groove G6 is formed by branching from the fourth type groove G4 in the tire width direction so as to communicate with each other and divide the third block B3 into a plurality of unit blocks.

The widths of the blocks B1, B2, B3, and B4 are formed to be 11 to 22% of the tread width TW, respectively, and the widths of the longitudinal grooves G1, G2, G3, and G4 are respectively tread widths (T1). TW) of 4.5 to 6.2%.

The first horizontal groove G5 is curved in a curve form starting from one side of the first block B1 and penetrating through the fourth block B4 to the second block B2. G6) is connected in a curved form starting from one side of the fifth block B5 to the third block B3. The first horizontal groove G5 is curved downward from the first block B1 to the second block B2, and the second horizontal groove G6 is the third block from the fifth block B5. Upward towards (B3).

The longitudinal grooves G1, G2, G3, and G4 and the horizontal grooves G5 and G6 formed as described above not only improve driving maneuverability and braking performance on snow roads and ice roads, but also drain water on slush road surfaces. Improved performance can maximize braking and traction.

In particular, in the present invention, each side of the second block (B2) and the fourth block (B4) to the inner side at regular intervals so that the first type groove (G1) and the third type groove (G3) is formed in a zigzag form. The bending angle a is preferably about 3.4 ° with respect to the circumferential direction of the tread. The shape of the second block (B2) and the fourth block (B4) formed in this way can improve the driving maneuverability and braking performance on the snow road and ice road than the rectangular block, the first type groove (G1) of the zigzag shape ) And the third type groove G3 may further improve drainage performance when turning.

On the other hand, the first semi-groove G7 and the second semi-groove G8 are formed on the upper surfaces of the fourth block B4 and the fifth block B5, respectively. The first semi groove G7 is inclined at a predetermined angle with respect to the width direction (lateral direction) of the tread, but is inclined at about 14 degrees, for example. Similarly, the second semigroove G8 is inclined at a predetermined angle with respect to the width direction of the tread, for example, inclined at about 15 °. Here, the first semi groove G7 is formed in the middle of the fourth block B4 so as to communicate with the first type groove G1 and the third type groove G3, and the second semi grooves G8) is formed at a position in communication with the second type groove G2 and the second horizontal groove G6.

By the first semigroove G7 and the second semigroove G8 of this structure, the drainage performance between the above-described longitudinal grooves G1, G2, G3, and G4 and the transverse grooves G5 and G6 may be increased. In addition, it can further improve driving maneuverability and braking performance on snow and ice roads.

In addition, in order to improve driving maneuverability and braking performance on the snow road surface and the icy road surface, the first block B1, the second block B2, the third block B3, and the fourth block B4, A plurality of zigzag kerfs K1, K2, K3, K4, and K5 are formed. Cuffs K2 and K3 formed in the second block B2 and the third block B3 of the shoulder portion are horizontally formed in the tire width direction so as to improve the grip force when going straight, the first block B1 of the center portion, The cuffs K1, K4, K5 formed in the fourth block B4 and the fifth block B5 are inclined at different angles so as to improve the grip force during the turning. For example, the cuff K1 formed in the first block B1 is inclined at about 18 ° with respect to the tire width direction, and the cuff K4 formed in the fourth block B4 is inclined at about 27 ° with respect to the tire width direction. The cuff K5 formed in the fifth block B5 is inclined at about 15 ° with respect to the tire width direction. The cuff K4 formed in the fourth block B4 is inclined in the same direction as the first semi-groove G7, and the cuffs K1 and K5 formed in the first block B1 and the fifth block B5. It is inclined in the opposite direction to). In addition, the cuff K5 formed in the fifth block B5 is inclined in a direction different from that of the second semi-groove G8.

On the other hand, in the present invention, it is possible to reduce the noise by changing the blocks divided by the unit pitch into three types so as not to have a periodicity in the entire tire to prevent the generation of a single frequency peak band generated during driving.

Although the present invention has been described with respect to preferred embodiments, the present invention is not limited thereto, and various modifications and applications of the present invention can be made by those skilled in the art without departing from the gist of the present invention.

1 is a cross-sectional view showing the structure of a general tire.

2 is a cross-sectional view showing the structure of a conventional stud type snow tire.

3 is a partial perspective view showing a tread structure in a snow tire of a conventional studless type.

4 is a plan view showing a tread pattern shape of a snow tire according to the present invention.

Description of the Related Art

B1, B2, B3, B4, B5: Block

G1, G2, G3, G4: longitudinal groove

G5, G6: Lateral Groove

G7, G8: Semi Groove

K1, K2, K3, K4, K5: Cuff

TW: Tread Width

Claims (7)

A first block B1 formed at the center of the tread in the tire running direction, A second block B2 and a third block B3 respectively formed in the width direction of the tire on the shoulder portion of the tread; A fourth block (B4) and a fifth block (B5) formed between the first block (B1) and the second block (B2) and between the first block (B1) and the third block (B3), respectively; The first type grooves G1 and the second type, respectively, in the tire traveling direction so as to partition between the first block B1 and the fourth block B4 and between the first block B1 and the fifth block B5. Groove (G2), Third type grooves G3 and fourth respectively formed in the tire driving direction so as to partition between the second block B2 and the fourth block B4 and between the third block B3 and the fifth block B5. Long groove (G4), The first type groove G1 communicates with the first type groove G1 and the third type groove G3 and divides the second block B2 and the fourth block B4 into a plurality of unit blocks, respectively. And the first horizontal groove G5 formed by branching from the third type groove G3 in the tire width direction, respectively. The second horizontal groove G6 which is in communication with the fourth type groove G4 and branched from the fourth type groove G4 in the tire width direction so as to divide the third block B3 into a plurality of unit blocks. Has a tread pattern comprising a, Each side edge of the second block (B2) and the fourth block (B4) is bent inward at a predetermined interval so that the first type groove (G1) and the third type groove (G3) is formed in a zigzag form. Snow tires. The method of claim 1, The upper surface of the fourth block (B4) and the fifth block (B5), inclined at a predetermined angle in the middle of the fourth block (B4) to communicate with the first type groove (G1) and the third type groove (G3). The first semi grooves G7 formed therein and the second semi grooves G8 formed to be inclined at a predetermined angle are formed at positions communicating with the second type grooves G2 and the second horizontal grooves G6, respectively. Snow tires characterized in that. The method of claim 1, A plurality of zigzag-shaped cuffs K1, K2, K3, K4, and K5 are formed on upper surfaces of the first block B1, the second block B2, the third block B3, and the fourth block B4. Among them, the cuff (K2, K3) is formed horizontally in the tire width direction, wherein the cuff (K1, K4, K5) are each snow tire, characterized in that formed inclined at different angles. The method of claim 3, The cuff K4 formed in the fourth block B4 is inclined in the same direction as the first semi-groove G7, but the cuffs K1 and K5 formed in the first block B1 and the fifth block B5. Snow slope, characterized in that inclined in the opposite direction to the cuff (K5) formed in the fifth block (B5) and in a different direction than the second semi-groove (G8). The method of claim 1, The widths of the blocks B1, B2, B3, and B4 are formed to be 11 to 22% of the tread width TW, respectively, and the widths of the longitudinal grooves G1, G2, G3, and G4 are respectively tread widths (T1). Snow tires, characterized in that formed from 4.5 to 6.2% of the TW). The method of claim 1, The first horizontal groove G5 is curved in a curve form starting from one side of the first block B1 and penetrating through the fourth block B4 to the second block B2. G6) is a snow tire, characterized in that is connected in a curved form starting from one side of the fifth block (B5) to the third block (B3). The method of claim 6, The first horizontal groove G5 is curved downward from the first block B1 to the second block B2, and the second horizontal groove G6 is the third block B3 from the fifth block B5. Snow tires characterized in that the upward curve toward the).

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