KR100792974B1 - Heavy duty pneumatic vehicle tire - Google Patents

Abstract

A heavy duty pneumatic vehicle tire is provided to prevent partial abrasion by maximizing buffering effect of a lug and to minimize deformation of a sidewall by reducing movement of a tread edge section while driving a vehicle. A heavy duty pneumatic vehicle tire comprises a tread, a sidewall, a bead section and a shoulder section(11) formed between the tread and the sidewall. Lug grooves(12) are continuously formed at the shoulder section(11) in the inner circumferential direction of the tire. Cylindrical grooves(13) having a cylinder shape are formed in the inner sides of the lug grooves(12), respectively. The distance(d) between two ends of the cylindrical groove(13) is larger than the width(w) of the lug groove(12). The interval(D) between the cylindrical grooves(13) corresponds to 40% to 50% of the interval(L) between the lug grooves(12).

Description

Heavy-duty pneumatic tires {Heavy duty pneumatic vehicle tire}

1 is a side view of main parts of a heavy-duty tire of the present invention;

Figure 2 is an excerpt sectional view of the main portion of the heavy-load tire of the present invention

<Description of the symbols for the main parts of the drawings>

1. Tread

11.shoulder

12. Lug groove

13. Cylindrical groove

131. Stone Bump

14. Belt 3

2. Sidewall

3. Bead part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to heavy duty tires, and more particularly to improvements in cushioning lug grooves.

Typical heavy duty tires include a carcass made of steel and a belt layer consisting of 3-4 sheets. Such a heavy-loaded tire has been pointed out as an important problem of deterioration due to uneven wear, and various tread patterns have been introduced to improve this.

Particularly, in the shoulder portion where the tread portion and the sidewall portion meet, a lot of techniques for pattern formation of the shoulder portion have been proposed in order to solve this problem because the occurrence frequency of uneven wear is significantly higher than that of the other portions.

One of the patterns for preventing the uneven wear of the shoulder portion is to form a lug groove in the shoulder. These lug grooves can have a buffering effect at the shoulder portion, thereby preventing uneven wear, but it is difficult to expect a sufficient buffering effect by the lug groove alone. In recent years, a number of techniques for applying a decupling groove for forming a narrow circumferential groove in the shoulder portion have been introduced to prevent uneven wear. However, there is still a problem that the decoupling groove may be damaged such as tearing.

In addition, in addition to the uneven wear phenomenon, high heat is generated in the belt layer due to flexion movement and friction during driving, and this heat acts as a factor of deteriorating the durability of the tire. It does not provide a solution to the heat generation problem.

Thus, the present invention is to form a cylindrical groove in the circumferential direction inside the axial end of the lug groove, both ends of the cylindrical groove is characterized in that larger than the width of the lug groove to maximize the cushioning effect of the lug, row of tread belt portion It is an object of the present invention to provide a heavy duty tire that improves the durability of the tire by effectively releasing the gas.

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

The present invention consists of a tread (1), sidewall (2) and bead portion (3), the lug groove (12) in the circumferential direction on the shoulder portion (11) between the tread (1) and sidewall (2) In the continuously formed, the cylindrical groove 13 in the circumferential direction is formed inside the axial end of the lug groove 12, and both end distances d of the cylindrical groove 13 are the width of the lug groove 12 ( It is characterized by greater than w).

The diameter D1 of the cylindrical groove 13 is formed to be 3/10 of the lug groove length L3, and preferably 3.4 mm based on a general heavy tire.

The spacing D between each cylindrical groove 13 is 40-45% of the spacing L between the lug and the lug groove, and is preferably 12.7 mm based on a general heavy duty tire.

In order to prevent the stone from being inserted into the lug groove 12 and the cylindrical groove 13 when driving, the anti-rotation jaw 131 is formed at the corner where the inner surface of the lug groove 12 is in contact with the cylindrical groove 13 and rounding. It is desirable to have a treatment.

delete

As described above, according to the present invention, the buffering effect of the lug groove is maximized to prevent uneven wear, to reduce the movement of the tread edge portion during driving to minimize the deformation of the sidewall, and the tread belt through the cylindrical groove adjacent to the belt By discharging negative heat to the outside effectively, there is an effect of improving the durability of the tire.

Claims (4)

Comprising a tread and sidewalls and a bead portion, the lug groove is formed continuously in the circumferential direction on the shoulder portion between the tread and the sidewall, to form a cylindrical groove in the circumferential direction inside the axial end of the lug groove, Both ends of the groove (d) is a heavy-duty pneumatic tire, characterized in that larger than the width (w) of the lug groove. The heavy-duty pneumatic tire according to claim 1, wherein a bite stopper (131) is formed at an edge where the inner surface of the lug is in contact with the cylindrical groove. delete The diameter D1 of the cylindrical groove is defined as 3/10 of the lug groove length L3, and the spacing D between each cylindrical groove is 40- of the spacing L between the lug and the lug. Heavy duty pneumatic tire, characterized in that 45%.

Images