CN112976948B

CN112976948B - Off-road tyre

Info

Publication number: CN112976948B
Application number: CN202110374694.5A
Authority: CN
Inventors: 王�锋; 鲁言宏; 李梅; 孙仕娟; 刘飞; 朱丽艳; 陈东; 陈雪梅
Original assignee: Shandong Linglong Tyre Co Ltd
Current assignee: Shandong Linglong Tyre Co Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2024-05-14
Anticipated expiration: 2041-04-08
Also published as: CN112976948A

Abstract

The invention discloses an off-road tire, which comprises a tire body and a tread structure arranged on the surface of the tire body, wherein the tread structure consists of shoulder pattern blocks, side pattern blocks and center pattern blocks; the shoulder pattern blocks consist of long pattern blocks and short pattern blocks with different shapes; the long pattern blocks and the short pattern blocks are alternately arranged in the circumferential direction of the tire; the shoulder pattern blocks formed by each long pattern block and one short pattern block correspond to one edge pattern block, two edge pattern blocks are arranged in the transverse direction of the tire, and the two edge pattern blocks correspond to tire shoulders on two sides respectively. Even under the use condition of low air pressure, the tire can maintain the rigidity in the circumferential direction of the tire.

Description

Off-road tyre

Technical Field

The invention relates to the technical field of tires, in particular to an off-road tire.

Background

When a vehicle runs on off-road conditions (non-paved roads such as deserts and muddy roads), in order to ensure the traction performance of the tire, the capacity ratio of the grooves in the tread structure is generally increased, and the inclusion of the tire on mud and sand is increased, so that the traction performance is improved. In addition, in off-road conditions, people choose to increase the capability of the tire to sink sediment by adopting a method for reducing the tire pressure, and thereby further increase the traction performance of the tire.

The increase in the volume ratio of the grooves in the tread structure reduces the overall ratio of the blocks, and reduces the strength of individual blocks, while at the same time resulting in a decrease in rigidity in the tire circumferential direction. In particular, most people choose to use a method of reducing the tire pressure to more enhance the tire traction performance. At the same time, rigidity in the tire circumferential direction is further weakened. In the running process of the tire, the rigidity weakening can increase the heat generation of the tire, reduce the durability of the tire pattern block, and easily cause the phenomena of pattern block cracking, block collapse and the like. In addition, the reduced rigidity increases the hysteresis of the tire response, degrading the handling performance of the tire.

Disclosure of Invention

The present invention is directed to an off-road tire, which solves the above-mentioned problems.

In order to achieve the above purpose, the present invention provides the following technical solutions:

An off-road tire comprises a tire body and a tread structure arranged on the surface of the tire body, wherein the tread structure consists of shoulder pattern blocks, side pattern blocks and center pattern blocks; the shoulder pattern blocks consist of long pattern blocks and short pattern blocks with different shapes; the long pattern blocks and the short pattern blocks are alternately arranged in the circumferential direction of the tire; the shoulder pattern blocks formed by each long pattern block and one short pattern block correspond to one side pattern block, two side pattern blocks are arranged in the transverse direction of the tire, the two side pattern blocks correspond to the tire shoulders on two sides respectively, and the two side pattern blocks are arranged in a staggered manner in the circumferential direction of the tire and meshed with each other; and in the transverse direction of the tire, a central pattern block is arranged at the engagement center of the two side pattern blocks.

As a further scheme of the invention: two side blocks arranged in the transverse direction of the tire are defined as one group, and each two groups of side blocks form a special 'back' circulation structure in the circumferential direction of the tire.

As a further scheme of the invention: the center of each return-type circulation structure is provided with a corresponding central pattern block, and the central pattern block and the corresponding return-type circulation form a joggle-joint structure.

As a further scheme of the invention: the joggle joint type structure is characterized in that a central pattern block and two groups of edge pattern blocks form a linking area A, the linking area A forms a certain thickness, and the thickness is formed in a range of 0 mm-4 mm.

As a further scheme of the invention: the central pattern block forms a certain angle beta with the transverse direction of the tire, and the angle beta is formed between 20 degrees and 40 degrees.

As a further scheme of the invention: the central pattern block forms a length L1 in the transverse direction of the tire and forms a length L2 in the circumferential direction of the tire, and the length L1 of the central pattern block is larger than the length L2, so that the central pattern block presents a rectangle; the length L2 and the length L1 of the central pattern block form a certain proportion, and the proportion (L2/L1) is set between 0.4 and 0.9.

Compared with the prior art, the invention has the beneficial effects that: the invention provides an off-road tire, wherein four adjacent side pattern blocks in a tread structure form a reverse-word circulation, a central pattern block is added in the center of the reverse-word circulation, and a unique joggle structure is formed between the central pattern block and the four adjacent side pattern blocks. The joggle joint structure connects every four edge pattern blocks with one central pattern block, so that the central pattern block plays a role of connecting the edge pattern blocks, and the stress of the four edge pattern blocks is balanced in the connecting process, thereby improving the rigidity of the tire in the circumferential direction and the transverse direction, improving the control and traction performance of the tire and reducing the phenomena of pattern block split and block collapse. Even under the use condition of low air pressure, the tire can maintain the rigidity in the circumferential direction of the tire.

Drawings

Fig. 1 is a structural view of a tire tread to which an embodiment of the present invention is applied.

FIG. 2 is an enlarged view of a "joggle" configuration to which embodiments of the present invention are applied;

fig. 3 is a schematic thickness diagram of a link area a to which an embodiment of the present invention is applied.

Wherein: shoulder blocks 1, side blocks 2, center blocks 3, long blocks 11, short blocks 12.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, an off-road tire according to an embodiment of the present invention includes a tire body and a tread structure disposed on a surface thereof, wherein the tread structure is composed of shoulder blocks 1, side blocks 2 and center blocks 3. The shoulder blocks 1 are distributed at the left and right edges of the tread structure and are distributed in a symmetrical fashion. The shoulder block 1 is composed of long blocks 11 and short blocks 12 having different shapes. The long blocks 11 and the short blocks 12 are alternately arranged in the tire circumferential direction. Each of the long blocks 11 corresponds to one of the side blocks 2 with respect to the shoulder block 1 constituted by one of the short blocks 12. Two side pattern blocks 2 are arranged in the transverse direction of the tire, and the two side pattern blocks 2 are staggered and meshed with each other in the circumferential direction of the tire. Two side blocks 2 which are engaged with each other are defined as one group, and each two groups of side blocks 2 form a special "loop" in the tire circumferential direction. A central pattern block 3 is designed at the center of the 'Hui' shape circulation. The central pattern block 3 and the reverse word cycle form a unique joggle structure together. The joggle joint type structure designs a central pattern block 3 for every two groups of edge pattern blocks 2, and takes the central pattern block as a reference to form circulation in the circumferential direction of the tire. Each central block 3 acts as a linking edge block 2, thus equalizing the stress distribution in the central region of the crown and improving the overall rigidity of the tire in the circumferential direction. And the steering performance of the tire is improved on the basis of ensuring the overall traction performance of the tire.

Fig. 2 and 3 are enlarged views of a "joggle" structure and a thickness of a linking area a, to which the embodiments of the present invention are applied.

As shown in fig. 2 and 3, in the "joggle" structure, the center block 3 is located at the center of the "joggle" structure, and links the four side blocks 2 to form a linking area a, where a certain thickness H exists, and the thickness H is formed between 0mm and 4 mm. The thickness H is set to be larger in order to increase the rigidity in the tire circumferential direction. The thickness H is set smaller in order to reduce the rigidity in the tire circumferential direction. It should be noted that if the thickness H of the linking area a is set too large, the comfort performance, traction performance and mud and sand discharge performance of the tire are affected.

As shown in fig. 2, the center block 3 forms an angle β with the tire lateral direction, the angle β being formed between 20 ° and 40 °; preferably, the angle β is formed between 25 ° and 35 °. The center block 3 has a length L1 in the tire lateral direction and a length L2 in the tire circumferential direction. The length L1 of the central pattern block 3 is greater than the length L2, so that the central pattern block is rectangular; the length L2 and the length L1 of the central pattern block 3 form a certain proportion, and the proportion L2/L1 is set between 0.4 and 0.9. Preferably, the ratio L2/L1 is set between 0.45 and 0.75. At this time, if the angle β is too large or the ratio L2/L1 is too large, the linking reinforcement effect of the "mortise joint" structure in the tire circumferential direction is weakened, and the reinforcement effect of the "mortise joint" structure on the tire circumferential rigidity is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Claims

1. An off-road tire comprising a tire body and a tread structure disposed on a surface thereof;

The tire tread structure is characterized by comprising shoulder pattern blocks (1), side pattern blocks (2) and center pattern blocks (3);

the shoulder pattern block (1) consists of long pattern blocks (11) and short pattern blocks (12) with different shapes;

the long blocks (11) and the short blocks (12) are alternately arranged in the tire circumferential direction;

Shoulder pattern blocks (1) formed by each long pattern block (11) and one short pattern block (12) correspond to one side pattern block (2);

Two side pattern blocks (2) are arranged in the transverse direction of the tire, the two side pattern blocks (2) respectively correspond to tire shoulders on two sides, and the two side pattern blocks (2) are staggered and meshed with each other in the circumferential direction of the tire;

a central pattern block (3) is arranged at the center of the occlusion of the two edge pattern blocks (2) in the transverse direction of the tire;

two side pattern blocks (2) arranged in the transverse direction of the tire are defined as one group, and each two groups of side pattern blocks (2) form a special 'Chinese character' shape circulation structure in the circumferential direction of the tire;

The center of each return-type circulation structure is provided with a corresponding central pattern block (3), and the central pattern block (3) and the corresponding return-type circulation form a joggle-joint structure;

the central pattern block (3) forms a certain angle beta with the transverse direction of the tire, and the angle beta is formed between 20 degrees and 40 degrees;

the center block (3) has a length L1 in the tire transverse direction and a length L2 in the tire circumferential direction;

The length L1 of the central pattern block (3) is greater than the length L2, so that the central pattern block presents a rectangle; the length L2 and the length L1 of the central pattern block (3) form a certain proportion, and the proportion (L2/L1) is set between 0.4 and 0.9.

2. Off-road tyre according to claim 1, characterized in that the "joggle" structure, the central block (3) and the two sets of side blocks (2) form a linking area a, the linking area a forming a thickness in the range 0mm to 4 mm.