CN111703257A

CN111703257A - Tread structure and tire

Info

Publication number: CN111703257A
Application number: CN202010710377.1A
Authority: CN
Inventors: 陈建国; 龙娟; 黄炽强; 官声欣
Original assignee: Wanli Tire Corp ltd
Current assignee: Wanli Tire Corp ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-09-25
Anticipated expiration: 2040-07-22
Also published as: CN111703257B

Abstract

The application discloses a tread structure and a tire, wherein the tread structure is sequentially provided with an outer tire shoulder rib, a central rib and an inner tire shoulder rib which are separated by a longitudinal main groove from the outer side to the inner side; the outer tire shoulder rib is provided with a plurality of first transverse grooves which are arranged in the circumferential axial direction and have unequal pitches; the inner tire shoulder rib is provided with a plurality of second transverse grooves which are arranged in the circumferential axial direction and have unequal pitches; the first transverse groove is closed in the outer tire shoulder rib; the second transverse groove axially penetrates through the inner shoulder rib; the pitch of the first transverse groove is larger than that of the second transverse groove; the groove width of the first transverse groove is smaller than that of the second transverse groove; the central rib is provided with a plurality of first knife grooves with unequal intervals; the first cutter flutes are axially obliquely arranged with at least one end penetrating through the adjacent longitudinal main grooves. The tread structure makes the tire both have stable performance, the braking performance of controlling, guarantees again noise and takes comfortable performance, reaches the optimization and the balance of tread structural performance.

Description

Tread structure and tire

Technical Field

The application relates to the technical field of vehicle tires, in particular to a tread structure and a tire.

Background

The abrasion performance and the bearing performance of the tire are the focus of the market attention during the running of the vehicle. With the continuous development of the global automobile industry technology and the continuous improvement of the automobile concept by people, higher and higher requirements are put forward on tires for providing bearing capacity and transmitting driving force, particularly, the continuous expansion of new energy automobiles leads to the increasing attention on the noise, riding comfort, dry and wet land safety and rolling resistance performance of the tires.

Generally, the car tire tread has a large block pattern and a small block pattern, a symmetrical pattern, an asymmetrical pattern and a guide pattern according to different use requirements. How to improve the dry/wet control performance and the braking performance of the tire and ensure the riding comfort performance of the tire to the maximum extent so as to achieve the balance of the performances and design the optimal tire product is always the key consideration of tire tread pattern designers.

Disclosure of Invention

In view of the above, an object of the present application is to provide a tread structure and a tire, such that the tire has stable dry/wet handling performance and braking performance, and ensures noise and riding comfort performance, thereby achieving optimization and balance of tire performance.

In order to achieve the technical purpose, the application provides a tread structure, wherein outer shoulder ribs, central ribs and inner shoulder ribs which are separated by longitudinal main grooves are sequentially arranged from an outer shoulder contour line to an inner shoulder contour line;

the outer tire shoulder rib is provided with a plurality of first transverse grooves distributed around the circumference of the tire surface;

the inner tire shoulder rib is provided with a plurality of second transverse grooves distributed around the circumference of the tire surface;

the first transverse grooves are sequentially distributed at intervals according to a plurality of first pitches and do not penetrate through the adjacent longitudinal main grooves;

the second transverse grooves are sequentially distributed at intervals according to a plurality of second pitches, and both ends of each second transverse groove penetrate through the inner tire shoulder ribs;

preferably, the first pitches are 3-5;

the second pitches are 3-5;

there are a plurality of each of the first pitches and a plurality of each of the second pitches.

Preferably, the number of the first pitches is equal to that of the second pitches, and the first pitches correspond to the second pitches one by one;

any one first pitch is larger than or equal to a corresponding second pitch;

the groove width of the first transverse groove is smaller than that of the second transverse groove;

the central rib is provided with a plurality of first knife grooves which are distributed around the circumference of the tread and have unequal intervals;

the first cutter flutes are axially obliquely arranged, and at least one end of each first cutter flute penetrates through the adjacent longitudinal main groove.

Preferably, the number of the central ribs is 2-5.

Preferably, the number of the central ribs is 3, and a second central rib, a first central rib and a third central rib which are separated by the longitudinal main groove are sequentially formed along the outer shoulder rib towards the inner shoulder rib.

Preferably, at least one end of the first blade flute is provided with a wedge angle notch.

Preferably, a plurality of second cutter grooves which are obliquely arranged are arranged on the outer shoulder rib;

the second sipe number is 1/2 of the first transverse groove;

and the edge of the second knife slot is provided with a cutting edge which penetrates through the adjacent longitudinal main grooves.

Preferably, the depth of the middle part of the first knife groove is greater than that of the two ends of the first knife groove, and a thin steel sheet is embedded in the first knife groove.

Preferably, the longitudinal main grooves have chamfered groove walls.

Preferably, the groove width of the longitudinal main groove adjacent to the outer shoulder rib is smaller than the groove width of the longitudinal main groove adjacent to the inner shoulder rib.

Preferably, the groove edges of the first transverse groove and the second transverse groove are arcs formed by multiple arcs;

the edges of the first transverse groove and the second transverse groove are provided with cut edges;

the present application also provides a tire having a tread provided with the tread structure of any of the above.

According to the technical scheme, the tread structure comprises the outer shoulder ribs, the central ribs and the inner shoulder ribs, and the first transverse grooves, the first knife grooves and the second transverse grooves are respectively arranged at unequal pitches; the outer side emphasizes the controllability, and the first transverse groove is closed in the outer tire shoulder rib and does not penetrate through the main groove; the inner side is provided with water drainage performance, and the second transverse groove penetrates through the two sides; the design of the application can effectively reduce the rigidity of the tread, enhance the drainage performance of the wetland, improve the safety of the wetland and avoid the problem of easy loud resonance caused by equidistant arrangement, thereby achieving the purpose of reducing noise; meanwhile, as the first sipe is used as a dividing line of the central pattern rib, other sipe divisions are not arranged among all pitches, and when the tire is started, braked and turned, compared with the traditional pattern design with the sipe divisions, the rigidity of each pitch pattern block is stronger, the excessive deformation of the tire when the tire is contacted with the ground is reduced, the riding comfort is improved, and the performances of the tire such as control, abrasion, rolling resistance and the like are effectively kept; the arc top of the flute of the first knife adopts the design of an oblique trimming shape.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of an asymmetric tread configuration for a tire provided herein;

in the figure: 11. a first central rib; 12. a second central rib; 13. a third central rib; 2. an outer shoulder rib; 21. a first lateral trench; 22. a second flute; 3. an inner shoulder rib; 31. a second lateral trench; 4. a longitudinal main groove; 5. a first knife flute; 6. a wedge angle notch; 7. and (6) trimming.

Detailed Description

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses a tread structure.

Referring to fig. 1, the present application provides an embodiment: a tread structure, the tread structure arranges the outer tire shoulder rib 2, central rib and inner tire shoulder rib 3 separated by the longitudinal main groove 4 from the outer tire shoulder contour line to the inner tire shoulder contour line sequentially; the outer tire shoulder rib 2 is provided with a plurality of first transverse grooves 21 distributed around the circumference of the tire tread; the inner shoulder ribs 3 are provided with a plurality of second transverse grooves 31 distributed around the circumference of the tread; the first transverse grooves 21 are sequentially distributed at intervals according to a plurality of first pitches; the second transverse grooves 31 are sequentially distributed at intervals according to a plurality of second pitches; the first transverse grooves 21 do not penetrate through the adjacent longitudinal main grooves, so that the grounding area is increased, and the operability is enhanced; the second transverse grooves 31 axially penetrate through the inner shoulder ribs, namely one ends of the second transverse grooves penetrate through the adjacent longitudinal main grooves 4, and the other ends of the second transverse grooves penetrate through the outer portion of the tire tread, so that the drainage performance of the tire is enhanced; the number of first lateral grooves 21 is less than the number of second lateral grooves 31; while the width of the first transverse groove 21 is smaller than the width of the second transverse groove 31; the central rib is provided with a plurality of first knife grooves 5 which are distributed around the circumference of the tread and have unequal intervals; the first cutter groove grains 5 are axially and obliquely arranged, and at least one end of each first cutter groove grain penetrates through the adjacent longitudinal main grooves 4; the axial inclination arrangement is that the tire rotation axis is used as a reference line to incline left and right.

The unequal distance arrangement of the first transverse groove 21, the second transverse groove 31 and the first knife groove strip 5 avoids the resonance noise of the tire; the first sipe grooves 5 penetrating the longitudinal main grooves 4 further improves the drainage performance of the tire, and specifically, may penetrate the longitudinal main grooves 4 on both sides or may penetrate only one side.

The above is a first embodiment of a tread structure provided in the embodiments of the present application, and the following is a second embodiment of a tread structure provided in the embodiments of the present application, specifically referring to fig. 1:

a tread structure, the tread structure arranges the outer tire shoulder rib 2, central rib and inner tire shoulder rib 3 separated by the longitudinal main groove 4 from the outer tire shoulder contour line to the inner tire shoulder contour line sequentially; the outer tire shoulder rib 2 is provided with a plurality of first transverse grooves 21 distributed around the circumference of the tire tread; the inner shoulder ribs 3 are provided with a plurality of second transverse grooves 31 distributed around the circumference of the tread; the first transverse grooves 21 are sequentially distributed at intervals according to a plurality of first pitches; the second transverse grooves 31 are sequentially distributed at intervals according to a plurality of second pitches; the first transverse grooves 21 do not penetrate through the adjacent longitudinal main grooves, so that the grounding area is increased, and the operability is enhanced; the second transverse grooves 31 axially penetrate through the inner shoulder ribs, namely one ends of the second transverse grooves penetrate through the adjacent longitudinal main grooves 4, and the other ends of the second transverse grooves penetrate through the outer portion of the tire tread, so that the drainage performance of the tire is enhanced; the number of first lateral grooves 21 is less than the number of second lateral grooves 31; while the width of the first transverse groove 21 is smaller than the width of the second transverse groove 31; the central rib is provided with a plurality of first knife grooves 5 which are distributed around the circumference of the tread and have unequal intervals; the first cutter groove grains 5 are axially and obliquely arranged, and at least one end of each first cutter groove grain penetrates through the adjacent longitudinal main grooves 4; the axial inclination arrangement is that the tire rotation axis is used as a reference line to incline left and right.

Further, the first pitch is 3-5, and the second pitch is 3-5; there are a plurality of the various first pitches and a plurality of the various second pitches.

Furthermore, the number of the first pitches is equal to that of the second pitches, and the first pitches correspond to the second pitches one by one; any one of the first pitches is greater than a corresponding one of the second pitches.

Particularly, the existence of multiple pitches optimizes the noise of the tire in the running process and effectively avoids the resonance problem; conventionally arranged in 3-5 pitches, each width pitch comprising a plurality of numbers; in this embodiment, the number of the first pitches is equal to that of the second pitches, and corresponds to each other.

Taking 3 types of the first pitches and the second pitches as an example, the widths of the three first pitches are respectively W1, W2 and W3, and the widths of the corresponding three second pitches are respectively N1, N2 and N3, wherein W1 is greater than N1, W2 is greater than N2, and W3 is greater than N3, so that the outer shoulder rib 2 has a larger grounding area and better operability compared with the inner shoulder rib 1.

Further, the depths of different positions of each first knife groove grain 5 are not equal, and the depths of two ends of the first knife groove grain 5 are smaller than the depth of the middle of the first knife groove grain 5.

Furthermore, the number of the central ribs is 2-5, and the number of the corresponding longitudinal main grooves 4 is 3-6.

Specifically, the unequal spacing arrangement of the plurality of central ribs is similar to the first pitch and the second pitch, and a plurality of spacings are protected, specifically such that the spacing of the central ribs near the inner side is smaller than the corresponding spacing of the central ribs near the outer side.

Further, in this embodiment, the number of the center ribs is 3, and the second center rib 12, the first center rib 11, and the third center rib 13 are respectively arranged along the outer shoulder rib toward the inner shoulder rib.

Further, the first lug grooves 5 are inclined upward from the upper side to the lower side at the end near the inner shoulder rib 3 and downward from the upper side to the lower side at the end near the outer shoulder rib 2.

Furthermore, the two edges of the first knife groove strip 5 are provided with cut edges 7, and at least one end of the first knife groove strip is provided with a wedge angle notch 6.

The arrangement of the cut edges 7 on the first knife groove lines 5 enhances the drainage of the wetland; meanwhile, the wedge angle notch is more beneficial to the tire to puncture a water film, the early-stage abrasion of the end part is prevented, the noise is optimized, the end part can be mutually supported when the tire tread is deformed, and the excessive deformation is reduced; in other embodiments, the first blade flutes 5 disposed on different center ribs may be disposed in other manners according to different road conditions of different vehicles, for example, wedge-angle notches are disposed at both left and right ends of the first blade flutes 5 on the center ribs.

Further, second knife groove grains 22 are arranged between every two first transverse grooves 21, one end of each second knife groove grain 22 penetrates through the longitudinal main groove 4, and the end is provided with a cutting edge 7;

the second knife blade grooves 22 are distributed among the first transverse grooves 21 at intervals, and the number of the second knife blade grooves is 1/2 of the first transverse grooves 21;

the spaced apart arrangement here means that the number of axially arranged first transverse grooves 21 is 2 between two second flutes 22.

The rigidity of the outer tire shoulder rib 2 is effectively reduced by the second sipes, and the turning control performance is improved.

Furthermore, fine steel sheets are embedded in the first knife groove grains 5, so that the effect of reducing the rigidity of the central rib within a certain range is achieved, and the riding comfort is improved.

Further, the inner groove wall of the longitudinal main groove 4 has a certain inclined angle;

particularly, the inclination angle of the groove wall is variable between 8 and 15 degrees, the self-cleaning capability of the tire is improved, and the wet land anti-skid performance, the turning stability and the accurate steering response are provided.

Further, the groove width of the longitudinal main groove 4 on the outer side of the tire is smaller than that of the inner main groove 4, so that the grounding area of the outer tire shoulder rib 2 is effectively increased, and the steering control stability of the tire is facilitated.

Further, the groove edges of the first transverse groove 21 and the second transverse groove 31 are all designed to be in multi-section arc eccentric wear prevention, and the groove edges are provided with the cut edges 7, so that the drainage performance is further enhanced, the abnormal wear condition of the tire in the early stage of use is reduced, and the attractiveness is improved.

The above is the second embodiment of the tread structure provided in the embodiments of the present application, and the present application also provides the third embodiment: a tire comprising the tread structure of any of the above embodiments.

Further, the first transverse groove 21 and the second transverse groove 31 are arranged in different pitches and different widths; the pitch width of the first transverse grooves 21 can be set to be 25-60 mm, and the number of the first transverse grooves is 45-65; the pitch width of the second transverse grooves 31 can be set to be 20-45 mm, the number of the second transverse grooves is 65-85, and specifically, the pitch width of the first transverse grooves 21 is constantly larger than that of the second transverse grooves 31.

Further, the width of each first knife flute 5 is less than 8 mm; the width of the longitudinal main groove 4 can be 8 mm-16 mm.

Furthermore, the ratio of the width of the central rib to the width of the whole tread is 0.45-0.6; the width of the inner shoulder rib 31 accounts for the whole tread width and is 0.18-0.25, and the width of the outer shoulder rib 21 is larger than that of the inner shoulder rib 31 by adjusting the groove width of the longitudinal main groove 4.

The tread of the whole tire adopts an asymmetric design, and the groove edge lines of the first transverse groove 21 and the second transverse groove 31 adopt an anti-eccentric wear design of a multi-section arc, so that the shape and the grounding stress distribution of a grounding impression of a tire shoulder part of the tire are optimized, the early wear of the tire shoulder part is prevented, and the control stability of the tire is enhanced.

While the present application has been described with reference to the particular embodiments and applications of the present application, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present application.

Claims

1. The tire tread structure is characterized in that an outer tire shoulder rib, a central rib and an inner tire shoulder rib which are separated by a longitudinal main groove are sequentially arranged on the tire tread structure from an outer tire shoulder contour line to an inner tire shoulder contour line;

the outer tire shoulder rib is provided with a plurality of first transverse grooves distributed around the circumference of the tire tread;

the inner shoulder ribs are provided with a plurality of second transverse grooves distributed around the circumference of the tire tread;

2. A tread structure according to claim 1, wherein said first pitches are 3-5;

the second pitches are 3-5;

3. A tread structure according to claim 2, wherein said first number of pitches is equal to said second number of pitches, in a one-to-one correspondence;

any one of the first pitches is greater than a corresponding one of the second pitches.

4. A tread structure according to claim 1, wherein the number of said central ribs is 2-5.

5. The tread structure according to claim 4, wherein said central ribs are 3, and are respectively formed in sequence from said outer shoulder rib to said inner shoulder rib, a second central rib, a first central rib and a third central rib separated by said longitudinal main grooves;

the groove edges at two sides of the first knife groove are provided with cut edges, and at least one end of the first knife groove is provided with a wedge angle notch.

6. A tread structure according to claim 1, wherein said outer shoulder rib is provided with a plurality of second sipes arranged obliquely and passing through adjacent said longitudinal main grooves;

the second sipe number is 1/2 of the first transverse groove;

and the edge of the second knife slot is provided with a cutting edge.

7. The tread structure of claim 1, wherein the depth of the middle portion of the first blade groove is greater than the depths of the two ends, and steel sheets are embedded in the middle portion of the first blade groove.

8. A tread structure according to claim 1, wherein said longitudinal main grooves have chamfered groove walls;

the groove width of the longitudinal main groove adjacent to the outer tire shoulder rib is smaller than that of the longitudinal main groove adjacent to the inner tire shoulder rib.

9. The tread structure of claim 4, wherein the grooves of the first and second lateral grooves are arcs of a plurality of arcs along the side lines;

the edges of the first transverse groove and the second transverse groove are also provided with cut edges;

and a cut edge is also arranged at one end edge of the second transverse groove, which is communicated with the adjacent longitudinal main groove.

10. A tyre, characterized in that the tread of the tyre is provided with a tread structure according to any one of claims 1 to 9.