KR100425834B1 - Tire for military use improving in discharging soil and stability of trveling - Google Patents

Abstract

When the tire rotates, the ground pressure is generated between the road surface and the tire tread ground plane. If the ground pressure is not evenly distributed, uneven wear occurs between the unit blocks of the tread, resulting in the vibration of the tire, and the ground pressure. Due to the nonuniformity of the vehicle, there is a risk of serious vehicle accidents due to deterioration of traction with the road surface. In addition, due to a relationship in which each unit block of the tread is not ideally arranged, the traction performance is also acted as a factor of lowering the traction performance.

In the present invention, by appropriately arranging the blocks and grooves of the tread portion, by maintaining the stiffness between the unit blocks sufficiently to induce a uniform ground pressure, to improve the tire shaking and noise, and also to improve the handling performance (handling). In addition, the smooth traction performance was induced to exhibit excellent traction performance.

Description

Military tire with improved soil stability and driving stability {TIRE FOR MILITARY USE IMPROVING IN DISCHARGING SOIL AND STABILITY OF TRVELING}

The present invention is to improve the running stability in addition to the performance required in the running characteristics of military tires, that is, the soil discharge, traction and uniform wear performance, and in order to satisfy the above-mentioned performances at the same time, A military tire having a tread pattern in which blocks and grooves are appropriately arranged.

The soil release property refers to a property of pushing out soil, etc. trapped between tread grooves, that is, a tire spitting soil and stones stuck between blocks of a tread pattern while driving.

Among the general tires, especially the road surface of military tires has various driving conditions such as field roads, unpaved roads, and pavement roads. Therefore, a tread pattern capable of exhibiting performance suitable for such various driving surfaces is required.

However, the conventional tread pattern of tires applied to military trucks has had a limitation in that the arrangement of blocks and grooves simultaneously meets the above various performances.

To be more specific, the tread pattern configuration of military tires to improve traction performance and soiling performance is vulnerable to driving stability performance, that is, handling, driving stability, noise, etc., and the pattern configuration for driving stability performance deteriorates traction performance. Had the disadvantages of being.

The present invention has been made to improve the problems of the tread pattern of the conventional tire as described above, and an object of the present invention is to provide a tread pattern that improves the driving stability performance while maintaining the topological performance and traction performance.

1 is a perspective view of a tire tread according to the present invention,

2 is a detailed view of the main part of FIG.

3 is an enlarged view illustrating main parts of FIG. 2.

(Explanation of reference numerals)

W ... Tread entire ground area (tread full width)

Wc ... center block area, Ws ... shoulder block area,

L ... connecting virtual line of center block and shoulder block,

α ... the angle between the transverse direction of the ground plane and the imaginary line (L),

Bc ... center block, Bs ... shoulder block,

Groove width between short sides of G1 ... center block,

Groove width between center block and short side and shoulder block,

Tie bar connecting T1 ... center block, T2 bar connecting T2 ... center block and shoulder block,

C ... center block length, D ... center block width,

H1, H2, H3, H4 ... round the corners of the center block,

Sw ... total length of the shoulder block, δ ... inflection angle of the shoulder block.

Hereinafter, a configuration of a tread pattern of a tire according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a tire tread according to the present invention, FIG. 2 is a detailed view of the main part of FIG.

On the basis of when the tread grounds the ground, the entire tread ground area W is divided into the center block area Wc of the tread and the shoulder block area Ws on both sides thereof. Such block regions are repeatedly arranged in the circumferential direction of the tire to form a block array.

The boundary between the center block area Wc and the shoulder block area Ws is bounded by a range of four quarters of the full width W of the tread, that is, W / 4, and the center block Bc and the shoulder block Bs. Is placed on one line L in the transverse direction of the ground plane, and this line L forms an angle α of 50 to 55 ° with respect to the running direction of the tire.

This allows the center block Bc and the shoulder block Bs to be located on one line L, thereby providing continuity of the grounded surface when the tire rotates, so that the tires for military vehicles run on pavement while remaining in traction performance. This is to prevent vehicle shaking caused by tire vibration.

The angle of 50 to 55 ° of the center block Bc and the shoulder block Bs with respect to the driving direction is set to maintain sufficient driving stability performance and to exhibit traction performance which is a basic performance in the field. At ~ 50km / h, the top up is made smoothly. In addition, it is a range that can prevent the shaking of the tire when traveling on the pavement at the speed of 80 ~ 90km / h, and to maximize the handling and running stability. Grooves are formed between the center blocks Bc, between the shoulder blocks Bs, and between the center blocks and the shoulder blocks. Further, in the groove G2 formed between the short side of the center block Bc and the short side of the shoulder block Bs opposite thereto, a tie bar T2 connecting the center block and the shoulder block is formed. Another groove T1 connecting the center block is formed in the groove formed between the long sides of the block.

The area ratio of the center block Bc and the shoulder block Bs is set in the range of 0.47 ≦ Bc / Bs ≦ 0.53. If the area ratio of the center block (Bc) and shoulder block (Bs) is out of the above range, due to the difference in the ground pressure, the block having a small area is relatively large stress is more likely to cause abnormal wear phenomenon, In addition, there is a disadvantage of the possibility of noise is set in the above range.

Further, the ratio of the groove width G1 between the short sides of the center block Bc and the width of the groove G2 between the short side of the center block and the short side of the shoulder block Bs is in the range of 0.78 ≦ G1 / G2 ≦ 0.82. Set it. In order to prevent the difference between the distance between the center block Bc and the shoulder block Bs too large, the range is set in the above range to exclude vehicle shaking and vibration caused by disconnection between the blocks when the tire rotates. If it is out of the above range, the grounding interval between each block increases, so that the possibility of power generation by vehicle vibration increases.

In addition, the tie bars T1 and T2 are set to a height of 10 to 12 mm at the bottom of the groove, and the width and length thereof are the width D and the length of the center block Bc. For C), it should be in the range of D / 3 and C / 2, respectively.

This is to prevent each block from being damaged by the impact of heavy loads or obstacles when the vehicle runs under heavy loads or when the vehicle passes obstacles such as stones / gravel, and to minimize the flow between blocks. If the height and width of the grooves are less than the above range, the binding force between the blocks is weakened, and there is a high risk of losing its function. If the grooves are more than the above range, the soiling and traction performance may be reduced.

3 is an enlarged view illustrating main parts of FIG. 2;

First, the center block Bc has a deformed rectangular shape so that the ratio D / C of the length C and the width D is in a range of 0.65 ≦ D / C ≦ 0.70, and the block itself is either up or down. It has the same shape from side to side. This is to maintain the rigidity sufficient for the force applied in the rotational direction and the transverse direction of the tire when the vehicle is running so that there is no deformation, and the ratio of width and length in the above range is sufficient to secure the width of the groove This is to improve Saturn / towing performance.

If the width is less than the above-mentioned range, the width of the groove becomes too large. Therefore, when the tread is grounded, the short circuit between the blocks becomes more likely to develop into a vehicle shaking phenomenon, and if it exceeds the above range, the width of the horizontal groove becomes dense. Running stability can be improved, but it results in a decrease in traction / discharge performance.

The corners H1 and H2 of the center block Bc are treated with rounds of R8 to R10 and R10 to R12, respectively, and the side surfaces H3 and H4 are treated with rounds of R18 to R22 and R28 to R32, respectively. The boundary is bounded by dividing the total length (C) by three. This is to prevent damage to the center block, the risk of damage due to the impact of the obstacle is greater when the range is below the above range, when the above range has a disadvantage that the strong image of the military tire pattern is impeded.

The shoulder block is configured to lie on an extension line of the center block, and the part facing the center block has the same width, and when the total length of the shoulder block is Sw, it is bent at the part of Sw / 3 from the end of the ground plane. The angle δ is in the range of 130 to 150 degrees.

The same widths of the center block and the shoulder block face each other to eliminate abnormal wear caused by the difference in stiffness of each block along with the continuity of the ground plane when the tire rotates. Sw / It is formed in three parts in order to maintain traction performance in the range which does not reduce the rigidity of the said shoulder block.

If it is larger than Sw / 3, the shoulder block retains more rigidity than necessary, and if it is lower than Sw / 3, the possibility of block damage is increased due to the decrease in rigidity of the shoulder block.

According to the tread pattern of the present invention made up of the above objects and configurations, it is possible to eliminate abnormal wear of the tire, to improve the clay / traction performance, to improve the running stability, and to improve the handling performance and noise (noise) Is also reduced.

Claims (6)

For military tires, The boundary between the center block Bc and the shoulder block Bs divided in the tread full width W is bounded at the position of W / 4 with respect to the tread full width W, and the center block Bc and the shoulder block ( Bs) lies on a straight line L having an angle α of 55 to 60 ° in the running direction of the ground plane, and the short side of the center block Bc and the shoulder block Bs opposite thereto. The groove G2 formed between the short sides of the tie bar T2 is formed to connect the center block and the shoulder block, and the groove formed between the long side of the center block is another tie bar T1 connecting the center block. Military tires, which are characterized in that the emulsification and running stability improved. The method of claim 1, An area tire having an area ratio between the center block Bc and the shoulder block Bs in the range of 0.47 ≦ Bc / Bs ≦ 0.53, wherein the tire and the run stability are improved. The method of claim 1, The ratio of the groove width G1 between the short side of the center block Bc and the groove width G2 between the short side of the center block and the short side block of the shoulder block Bs is in the range of 0.78 ≦ G1 / G2 ≦ 0.82. Military tire with improved clay and running stability. The method of claim 1, The height of the tie bars (T1, T2) has a range of 10-12mm, the width and the length of the width of the center block (Bc) D and the width (C) of D / 3 and C, respectively Military tires with improved soil stability and run stability, characterized in that the length of / 2. The method according to any one of claims 1 to 4, The center block (Bc) is a military tire with improved soil stability and run stability, characterized in that the ratio (D / C) of the length (C) and width (D) is 0.65≤D / C≤0.70. The method according to any one of claims 1 to 4, The shoulder block Bs forms a portion facing the center block Bc in the same width as the center block Bc, but Sw / 3 from the ground plane end with respect to the entire length Sw of the shoulder block Bs. Military tire with improved soil stability and running stability, characterized by having an angle of 130 to 150 ° from the position.