CN110182004B - A winter tire equipped with a multi-layer three-dimensional steel sheet structure - Google Patents

Abstract

The present invention discloses a winter tire equipped with a multi-layer three-dimensional steel sheet structure, specifically a tire having a main tread layer, a secondary tread layer and a bottom tread layer on a radial section, and a "water drop" type 3D three-dimensional profile structure with narrow grooves, which improves the tire tail swing problem caused by the swing of the tread sub-blocks. A tread pattern is also arranged on the tread, and the tread pattern includes a plurality of longitudinal grooves and a plurality of transverse grooves. The longitudinal grooves and the transverse grooves cut the tread into a plurality of pattern blocks. The longitudinal grooves are distributed along the circumference of the tire, and the longitudinal grooves include a first longitudinal groove and a second longitudinal groove. The transverse grooves are distributed on the left and right sides of the first longitudinal groove and the second longitudinal groove, and are arranged in a "herringbone" shape, including a first transverse groove and a second transverse groove.

Description

A winter tire equipped with a multi-layer three-dimensional steel sheet structure

Technical Field

The invention relates to the field of tires, in particular to a winter tire equipped with a multi-layer three-dimensional steel sheet structure.

Background Art

Snow tires are tires designed to further improve braking and handling performance on snowy or icy roads in winter compared to general tires.

The typical structure of a snow tire is generally based on a block tread pattern shape, and multiple cuts are used on the tread blocks to reduce rigidity and improve traction on snowy or icy roads. The presence of these cuts is one of the most significant features that distinguishes snow tires from traditional summer tires.

In existing tires, the presence of cuts can reduce the rigidity of the blocks and improve traction on snow, but the sub-blocks formed by the cuts swing a lot during vehicle driving, resulting in a defect of reduced braking performance or handling performance on general wet or dry roads.

Summary of the invention

Based on the deficiencies in the prior art mentioned in the above background technology, the present invention provides a winter tire equipped with a multi-layer three-dimensional steel sheet structure.

The present invention overcomes the above technical problems by adopting the following technical solutions, specifically:

A winter tire equipped with a multi-layered three-dimensional steel sheet structure comprises a carcass forming a main body of the tire, a crown reinforcement, two beads for fixing the tire to a rim, a sidewall extending radially outward from the bead to the crown, and a tread circumferentially covered by a rubber layer extending in an axial width across the crown reinforcement. A tread pattern is also arranged on the tread, the tread pattern comprises a plurality of longitudinal grooves and a plurality of transverse grooves, the longitudinal grooves and the transverse grooves cut the tread into a plurality of pattern blocks, the longitudinal grooves are distributed along the circumference of the tire, the longitudinal grooves comprise a first longitudinal groove and a second longitudinal groove, the transverse grooves are distributed on the left and right sides of the first longitudinal groove and the second longitudinal groove, and are arranged in a herringbone pattern, comprising a first transverse groove and a second transverse groove.

As a further solution of the present invention: the tread includes a main tread layer, a secondary tread layer and a bottom tread layer on a radial cross section.

As a further solution of the present invention: the main tread layer is made of a first rubber mixture with a Shore hardness of less than 60 in the vulcanized state, and its thickness is set to a value between 0.1 mm and 15 mm.

As a further solution of the present invention: the secondary tread layer is made of a second rubber mixture with a Shore hardness greater than or equal to the first rubber mixture, and its thickness is set to a value between 0.1 mm and 15 mm.

As a further solution of the present invention: the bottom tread layer is made of a third rubber mixture with viscosity, and the thickness is set to a value between 0.1 mm and 15 mm.

As a further solution of the present invention: the longitudinal grooves also include a first "Z"-shaped longitudinal groove, a second "Z"-shaped longitudinal groove, a first "V"-shaped longitudinal groove, a second "V"-shaped longitudinal groove, a third longitudinal groove and a fourth longitudinal groove.

As a further solution of the present invention: the first "Z"-shaped longitudinal groove, the second "Z"-shaped longitudinal groove, the first "V"-shaped longitudinal groove, the second "V"-shaped longitudinal groove, the third longitudinal groove and the fourth longitudinal groove are distributed in an intermittent circumferential form on the tire.

As a further solution of the present invention: the pattern block includes a first pattern block located at the tire top, and a plurality of narrow grooves are arranged on the first pattern block. The narrow grooves are on the circumferential surface of the first pattern block and are alternately in contact with the groove walls of the longitudinal grooves and the transverse grooves.

As a further solution of the present invention: the offset distance between the troughs or peaks corresponding to two adjacent narrow grooves is between 0mm and 5mm, the radial depth height difference between two adjacent narrow grooves on the same first pattern block is between 0.1mm and 20mm, and the distance from the narrow groove to the groove wall of the longitudinal groove and the transverse groove is between 0.1mm and 20mm.

As a further solution of the present invention: the narrow groove is in the shape of a water drop.

After adopting the above structure, the present invention has the following advantages compared with the prior art: maintaining the ice and snow performance of the tire through the main tread layer, improving the radial rigidity of the tire through the sub-tread layer, and preventing the sub-tread layer from separating from the crown reinforcement through the bottom tread; the "water drop" type 3D three-dimensional contour structure of the narrow groove provides a larger linear extension length than the straight structure under the same radial size, thereby providing a larger and higher gripping edge on snowy or muddy roads, improving the tire tail swing problem caused by the swing of the tread sub-blocks.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a winter tire equipped with a multi-layer three-dimensional steel sheet structure.

FIG. 2 is an enlarged top view of a tread block in a winter tire equipped with a multi-layer three-dimensional steel sheet structure.

FIG. 3 is a three-dimensional cross-sectional view of a tread block in a winter tire equipped with a multi-layer three-dimensional steel sheet structure.

In the figure: 1-longitudinal groove; 2-transverse groove; 3-narrow groove; 4-first pattern block; 11-first longitudinal groove; 12-second longitudinal groove; 13-first "Z"-shaped longitudinal groove; 14-second "Z"-shaped longitudinal groove; 15-first "V"-shaped longitudinal groove; 16-second "V"-shaped longitudinal groove; 17-third longitudinal groove; 18-fourth longitudinal groove; 21-first transverse groove; 22-second transverse groove.

DETAILED DESCRIPTION

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

When the term "radial" is used, the expression relates to the radial direction of the tire, if closer to the axis of rotation of the tire, then the expression is "radially inside"; when the term "circumferential" is used, the expression is related to the direction of tire rolling.

Example 1

Referring to FIGS. 1 to 3 , in an embodiment of the present invention, a winter tire equipped with a multi-layer three-dimensional steel sheet structure includes a carcass forming a tire body, a crown reinforcement, two beads for fixing the tire to a rim, a sidewall extending radially outward from the beads to the crown, and a tread circumferentially covered by a rubber layer extending across the crown reinforcement in an axial width;

Specifically, the tread includes a main tread layer, a sub-tread layer and a bottom tread layer on a radial section. The main tread layer is made of a first rubber mixture with a Shore hardness of less than 60 in the vulcanized state, and its thickness is set to a value between 0.1 mm and 15 mm, so as to maintain the ice and snow performance of the tire; the sub-tread layer is made of a second rubber mixture with a Shore hardness greater than or equal to the first rubber mixture, and its thickness is set to a value between 0.1 mm and 15 mm, so as to improve the radial rigidity of the tire; the bottom tread layer is made of a sticky third rubber mixture, so as to prevent the sub-tread layer from separating from the crown reinforcement, and the thickness of the rubber layer is set to a value between 0.1 mm and 15 mm.

Furthermore, a tread pattern is also provided on the tread, and the tread pattern includes a plurality of longitudinal grooves 1 and a plurality of transverse grooves 2. The longitudinal grooves 1 and the transverse grooves 2 cut the tread into a plurality of pattern blocks. Furthermore, the longitudinal grooves 1 are distributed along the circumference of the tire, and the longitudinal grooves 1 include a first longitudinal groove 11 and a second longitudinal groove 12. The transverse grooves 2 are distributed on the left and right sides of the first longitudinal grooves 11 and the second longitudinal grooves 12, and are arranged in a "herringbone" shape, including a first transverse groove 21 and a second transverse groove 22.

Preferably, the longitudinal groove 1 also includes a first "Z"-shaped longitudinal groove 13, a second "Z"-shaped longitudinal groove 14, a first "V"-shaped longitudinal groove 15, a second "V"-shaped longitudinal groove 16, a third longitudinal groove 17 and a fourth longitudinal groove 18. The first "Z"-shaped longitudinal groove 13, the second "Z"-shaped longitudinal groove 14, the first "V"-shaped longitudinal groove 15, the second "V"-shaped longitudinal groove 16, the third longitudinal groove 17 and the fourth longitudinal groove 18 are distributed in an intermittent circumferential form on the tire, thereby further dividing the tread blocks. The staggered longitudinal grooves 1 and transverse grooves 2 give the tire a greater snow holding capacity on snowy roads.

Furthermore, the pattern block includes a first pattern block 4 located at the top of the tire, and a plurality of narrow grooves 3 are arranged on the first pattern block 4. The narrow grooves 3 are on the circumferential surface of the first pattern block 4, and are alternately in contact with the groove walls of the longitudinal groove 1 and the transverse groove 2. It should be noted that the offset distance between the troughs or peaks corresponding to two adjacent narrow grooves 3 is between 0 mm and 5 mm, and the radial depth d height difference between two adjacent narrow grooves 3 on the same first pattern block 4 is between 0.1 mm and 20 mm. The distance from the narrow groove 3 to the groove walls of the longitudinal groove 1 and the transverse groove 2 is between 0.1 mm and 20 mm. The tire tread rigidity is enhanced by the alternating contact narrow grooves 3 and the stepped depth design.

In order to ensure that during the running of the tire, the small blocks support each other through the three-dimensional modeling part between the rubber materials on both side walls of the narrow groove 3, the narrow groove 3 is in a teardrop shape, which is formed by vulcanizing a teardrop-shaped three-dimensional steel sheet on a mold. The narrow groove 3 has a larger linear extension than a straight structure under the same radial size, and can better resist the shear stress of the tire circumference, thereby improving the braking performance and handling performance of the tire.

The tires in the embodiments of the present invention were compared with the narrow grooves in the prior art in a straight line structure in a real vehicle test to test the braking performance and handling performance of the tires on different road surfaces. The comparison data are as follows:

project Dry braking Dry handling Snow brakes Snow handling Braking on ice Ice Control Ordinary snow tires 100 100 100 100 100 100 Tire of the present invention 103 104 103 102 104 105

The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. However, all changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more related listed items.

Claims (4)

1. A winter tire equipped with a multi-layer three-dimensional steel sheet structure, comprising a tire carcass forming a tire body, a crown reinforcement, two tire beads for fixing the tire to a wheel rim, a sidewall extending radially outward from the tire bead to the crown, and a tread circumferentially covered by a rubber layer extending in an axial width across the crown reinforcement, characterized in that a tread pattern is also provided on the tread, the tread pattern comprising a plurality of longitudinal grooves (1) and a plurality of transverse grooves (2), the longitudinal grooves (1) and the transverse grooves (2) cutting the tread into a plurality of pattern blocks, the longitudinal grooves (1) being distributed along the tire circumference, the longitudinal grooves (1) comprising a first longitudinal groove (11) and a second longitudinal groove (12), the transverse grooves (2) being distributed on the left and right sides of the first longitudinal groove (11) and the second longitudinal groove (12), being arranged in a herringbone pattern, and comprising a first transverse groove (21) and a second transverse groove (22); The tread comprises a main tread layer, a subtread layer and a bottom tread layer in a radial cross section; The main tread layer is made of a first rubber mixture with a Shore hardness of less than 60 in a vulcanized state, and its thickness is set to a value between 0.1 mm and 15 mm; The secondary tread layer is made of a second rubber mixture with a Shore hardness greater than or equal to the first rubber mixture, and its thickness is set to a value between 0.1 mm and 15 mm; The tread block comprises a first tread block (4) located at the top of the tire, a plurality of narrow grooves (3) are arranged on the first tread block (4), and the narrow grooves (3) are on the circumferential surface of the first tread block (4) and are in contact with the groove walls of the longitudinal grooves (1) and the transverse grooves (2) alternately; The offset distance between the troughs or crests corresponding to two adjacent narrow grooves (3) is between 0 mm and 5 mm, the radial depth height difference between two adjacent narrow grooves (3) on the same first pattern block (4) is between 0.1 mm and 20 mm, and the distance from the narrow groove (3) to the groove wall of the longitudinal groove (1) and the transverse groove (2) is between 0.1 mm and 20 mm; The narrow groove (3) is in the shape of a water drop. 2. A winter tire equipped with a multi-layered three-dimensional steel sheet structure according to claim 1, characterized in that the bottom tread layer is made of a third rubber mixture with viscosity, and the thickness setting value is between 0.1 mm and 15 mm. 3. A winter tire equipped with a multi-layer three-dimensional steel sheet structure according to claim 1, characterized in that the longitudinal groove (1) further comprises a first "Z"-shaped longitudinal groove (13), a second "Z"-shaped longitudinal groove (14), a first "V"-shaped longitudinal groove (15), a second "V"-shaped longitudinal groove (16), a third longitudinal groove (17) and a fourth longitudinal groove (18). 4. A winter tire equipped with a multi-layer three-dimensional steel sheet structure according to claim 3, characterized in that the first "Z"-shaped longitudinal groove (13), the second "Z"-shaped longitudinal groove (14), the first "V"-shaped longitudinal groove (15), the second "V"-shaped longitudinal groove (16), the third longitudinal groove (17) and the fourth longitudinal groove (18) are distributed on the tire in an intermittent circumferential form.