阅读说明：本技术 一种低滚阻噪音的电动汽车轮胎 (Electric automobile tire with low rolling resistance noise ) 是由 王�锋 鲁言宏 李健军 王晓明 杨盛 陈雪梅 孙仕娟 李梅 陈东 朱丽艳 于 2020-03-31 设计创作，主要内容包括：本发明公开了一种低滚阻噪音的电动汽车轮胎,包括形成轮胎主体的胎体和胎冠增强件,胎体表面层包括一个主胎面层、一个副胎面层和一个底部胎面层；两个胎圈,与安装轮辋相接触用于将轮胎固定到轮辋上；两个胎肩,所述胎肩从胎圈径向向外延伸至胎冠,胎肩周向各节距排布时,采用多层次变节距排列方式,所述排列方式包括两个中部花纹块部位Ⅱ和位于二者之间的胎肩部位Ⅰ,本发明中胎面周向各节距排布时,采用多层次变节距排列方式,通过仿真模拟优化分析,实现轮胎低噪音特性；纵向沟槽和横向沟槽将胎面分割成多个花纹块,各花纹块周向表面分布有多条细窄的沟槽,用于破开水膜,提升轮胎抓地力。(The invention discloses a low rolling resistance noise electric vehicle tire, which comprises a tire body and a tire crown reinforcing part, wherein the tire body and the tire crown reinforcing part form a tire main body; two beads in contact with the mounting rim for securing the tire to the rim; the tire comprises two tire shoulders, wherein the tire shoulders extend outwards from the tire bead to the tire crown in the radial direction, and when the tire shoulders are arranged at each pitch in the circumferential direction, a multi-level variable-pitch arrangement mode is adopted, wherein the arrangement mode comprises two middle pattern block parts II and a tire shoulder part I positioned between the two middle pattern block parts II; the tread is divided into a plurality of pattern blocks by the longitudinal grooves and the transverse grooves, and a plurality of narrow grooves are distributed on the circumferential surface of each pattern block and used for breaking a water film and improving the grip of the tire.)

1. A low rolling resistance noise motor vehicle tyre, characterized by comprising a carcass (10) and a crown reinforcement forming the main body of the tyre, the surface layer of the carcass (10) comprising a main tread layer (11), a secondary tread layer (12) and a bottom tread layer (13);

two beads in contact with the mounting rim for securing the tire to the rim;

the tire shoulder extends outwards from the tire bead to the tire crown in the radial direction, and when the tire shoulders are distributed at each pitch in the circumferential direction, a multi-level variable-pitch arrangement mode is adopted, wherein the arrangement mode comprises two middle pattern block parts II and a tire shoulder part I positioned between the two middle pattern block parts II;

the tread, the tread is crossed the rubber layer that the whole axial width of crown reinforcement extends and covers circumferentially, and radially by the compound sizing composition of multilayer, be equipped with the tread pattern on the tread, the tread pattern comprises a plurality of longitudinal grooves (31) and a plurality of horizontal grooves (32), and longitudinal grooves (31) and horizontal grooves (32) cut into a plurality of decorative pattern blocks (20) with the tire tread, distribute many thin narrow grooves (40) that are used for destroying the water film in order to strengthen the grip of tire on the block (20) circumferential surface.

2. The low rolling noise electric vehicle tire according to claim 1, wherein the radial depth of the grooves (40) is not greater than 1 mm.

3. The low rolling resistance noise electric vehicle tire according to claim 1, wherein the main tread layer (11) is made of a first rubber compound having tan no less than 1.0 at 0 ℃ and a radial thickness setting in the range of 0.1mm to 15 mm.

4. The low rolling resistance noise electric vehicle tire according to claim 1, wherein the secondary tread layer (12) is made of a second rubber compound having tan no greater than 0.1 at 60 ℃, and its radial thickness setting is in the range of 0.1mm to 15 mm.

5. Motor vehicle tyre with low rolling resistance noise according to claim 1, characterized in that the bottom tread layer (13) is made of a third rubber compound with very high viscosity, with a radial thickness setting in the range of 0.1mm to 15 mm.

6. The electric vehicle tire with low rolling resistance noise according to claim 1, wherein the tire shoulder portion I adopts an arrangement mode that the total pitch number is not less than sixty and the pitch type is not less than three, and the middle pattern block portion II adopts an arrangement mode that the total pitch number is not less than forty and the pitch type is not less than three.

7. The low rolling resistance noise electric vehicle tire according to claim 1, wherein the total number of the tire shoulder portion i is sixty-four pitches, the pitch types are four, and the total pitch number of the middle block portion ii is forty-five, and the pitch types are three.

Technical Field

The invention relates to the technical field of tire equipment, in particular to an electric automobile tire with low rolling resistance noise.

Background

Generally, a tire comprises: a tread cap comprising a tread rubber layer and a tread cap reinforcement. The crown reinforcement is covered by steel wires and nylon fibers along the circumferential direction of the tire; two sidewalls extending radially outward from the bead to a crown; two beads intended to come into contact with a mounting rim for fixing the tyre to the rim; at least one carcass reinforcement is anchored to each bead, usually by winding around a reinforcing structure of a circumferential steel wire.

With the increasing exhaustion of petroleum energy, the automobile industry is more and more developing towards the aspect of new energy electric automobiles. The limitation of the battery technology of the electric automobile often cannot provide higher endurance mileage. In order to ensure the high mileage of a vehicle, the tire which is the only tire of the whole vehicle and is in contact with the ground needs to have the performance requirement of low rolling resistance, and the electric vehicle instantly reaches the maximum torque when being started, so that the used tire needs higher ground holding force, but the performance of the existing tire cannot meet the requirement.

In view of the above problems, a low rolling resistance noise electric vehicle tire is now provided.

Disclosure of Invention

The invention aims to provide an electric vehicle tire with low rolling resistance noise to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a low rolling resistance noise electric vehicle tyre comprises a tyre body and a tyre crown reinforcing member, wherein the tyre body comprises a main tyre surface layer, a secondary tyre surface layer and a bottom tyre surface layer;

two beads in contact with the mounting rim for securing the tire to the rim;

the tire shoulder extends outwards from the tire bead to the tire crown in the radial direction, and when the tire shoulders are distributed at each pitch in the circumferential direction, a multi-level variable-pitch arrangement mode is adopted, wherein the arrangement mode comprises two middle pattern block parts II and a tire shoulder part I positioned between the two middle pattern block parts II;

the tire tread is circumferentially covered by a rubber layer stretching across the whole axial width of the crown reinforcement and is composed of multiple layers of composite rubber materials in the radial direction, tread patterns are arranged on the tire tread and are composed of a plurality of longitudinal grooves and a plurality of transverse grooves, the tire tread is cut into a plurality of pattern blocks by the longitudinal grooves and the transverse grooves, and a plurality of narrow grooves used for breaking water films to enhance the grip force of the tire are distributed on the circumferential surface of each pattern block.

As a further scheme of the invention: the radial depth of the groove is not more than 1 mm.

As a still further scheme of the invention: the main tread layer is made of a first rubber compound having tan no less than 1.0 at 0 ℃ and has a radial thickness setting in the range of 0.1mm to 15 mm.

As a still further scheme of the invention: the sub tread layer is made of a second rubber compound having tan of not more than 0.1 at 60 ℃, and its radial thickness setting value is in the range of 0.1mm to 15 mm.

As a still further scheme of the invention: the bottom tread layer is made of a third rubber compound of extremely strong viscosity, with a set value of radial thickness in the range of 0.1mm to 15 mm.

As a still further scheme of the invention: the tire shoulder part I adopts an arrangement mode that the total pitch number is not less than sixty and the pitch type is not less than three, and the middle pattern block part II adopts an arrangement mode that the total pitch number is not less than forty and the pitch type is not less than three.

As a still further scheme of the invention: the total number of the tire shoulder parts I is sixty-four pitches, the types of the pitches are four, the total number of the pitches of the middle pattern block parts II is forty-five, and the types of the pitches are three.

Compared with the prior art, the invention has the beneficial effects that: when the tire tread is distributed at each pitch in the circumferential direction, a multi-level variable pitch arrangement mode is adopted, and the low-noise characteristic of the tire is realized through simulation optimization analysis; the tread is divided into a plurality of pattern blocks by the longitudinal grooves and the transverse grooves, and a plurality of narrow grooves are distributed on the circumferential surface of each pattern block and used for breaking a water film and improving the grip of the tire.

Drawings

Fig. 1 is a front view of a tire for an electric vehicle according to a preferred embodiment of the present invention;

FIG. 2-1 is an enlarged top view of the block shown in FIG. 1;

FIG. 2-2 is a schematic view of the narrow groove of FIG. 2 during vehicle travel;

FIG. 3 is a radial cross-sectional view of a multi-level tread;

fig. 4 is a pitch arrangement explanatory diagram.

Wherein: carcass 10, main tread layer 11, one secondary tread layer 12, one bottom tread layer 13, blocks 20, longitudinal grooves 31, lateral grooves 32, grooves 40.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.