CN111703258B - Tread structure and tire - Google Patents

Abstract

The application discloses a tread structure and a tire, wherein the tread structure is sequentially provided with an outer shoulder rib, a center rib and an inner 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 circumferentially and axially arranged and have unequal pitches; the inner shoulder rib is provided with a plurality of second transverse grooves which are axially arranged along the circumference and have unequal pitches; the first transverse groove penetrates through the longitudinal main groove; the second transverse groove axially penetrates through the inner shoulder rib; the pitch of the first transverse grooves is larger than that of the second transverse grooves; the first transverse groove has a smaller groove width than the second transverse groove; the central rib is provided with a plurality of first knife flutes with unequal intervals; the first sipe is disposed axially and obliquely, and at least one end extends through an adjacent longitudinal primary groove. The tread structure of the application ensures that the tire has stable control performance and braking performance, ensures noise and riding comfort performance, and achieves the optimization and balance of the tread structure performance.

Description

Tread structure and tire

Technical Field

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

Background

The wear and load bearing properties of tires during vehicle travel are a focus of market attention. With the continuous development of global automobile industry technology and the continuous improvement of automobile concepts by people, higher and higher requirements are put on tires for providing bearing capacity and transmitting driving force, and particularly, the continuous expansion and the expansion of new energy automobiles are also focused on the noise, riding comfort, dry and wet land safety and rolling resistance of the tires.

Generally, according to different use requirements, the tread structure pattern of the car has the parts of large block patterns and small block patterns, symmetrical patterns, asymmetrical patterns and guiding patterns. How to improve the control performance and braking performance of the tire dry/wet land and ensure the riding comfort performance of the vehicle to the greatest extent, so as to achieve the balance of the performance, design the best tread structure product, and the design of the best tread structure product is always considered by tire tread pattern designers.

Disclosure of Invention

In view of the above, the present application aims to provide a tread structure and a tire, which enable the tire to have stable dry/wet steering performance and braking performance, ensure noise and riding comfort performance, and achieve optimization and balance of tread structure performance.

In order to achieve the technical aim, the application provides a tread structure, wherein an outer tire shoulder rib, a center rib and an inner tire shoulder rib which are separated by a longitudinal main groove are sequentially distributed 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 rib is provided with a plurality of second transverse grooves distributed around the circumference of the tread;

the first transverse grooves are sequentially distributed at intervals according to various first pitches and penetrate through adjacent longitudinal main grooves;

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

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 cutter grooves which are distributed around the circumference of the tread and are not equally spaced;

The first sipe is disposed axially and obliquely, and at least one end penetrates adjacent to the longitudinal main groove.

Preferably, the first pitch is 3-5;

The number of the second pitches is 3-5;

A plurality of each of the first pitches and each of the second pitches.

Preferably, the first pitch seed number is equal to the second pitch seed number and corresponds to each other one by one;

Any one of the first pitches is larger than or equal to a corresponding one of the second pitches.

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

Preferably, the number of the central ribs is 3, and a first central rib, a second central rib and a third central rib separated by the longitudinal main groove are formed along the direction from the outer shoulder rib to the inner shoulder rib in sequence.

Preferably, the first sipe in the first center rib is axially through the first center rib;

a wedge angle notch is formed at one end, close to the outer shoulder rib, of the first knife groove on the second central rib and the first knife groove on the third central rib;

The first knife groove on the third center rib axially penetrates through the third center rib, and a trimming edge is arranged at one end edge, close to the inner shoulder rib.

Preferably, second tool flutes are arranged between every two first transverse grooves;

one end of each of two ends of the second cutter groove penetrates through the adjacent main groove, and a wedge angle notch is formed in the end;

the other end of the second knife groove penetrates through the outer tire shoulder rib to be communicated with the outer side of the tire.

Preferably, the depth of the middle part of the first tool groove is larger than that of the two ends, and steel sheets are inlaid in the first tool groove.

Preferably, the longitudinal main groove has a groove wall that is tangential.

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

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

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

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

The application also provides a tyre, the tread of which is provided with a tread structure as described in any of the preceding claims.

According to the technical scheme, the tread structure comprising the outer shoulder rib, the central rib and the inner shoulder rib is provided, and the first transverse grooves, the first knife grooves and the second transverse grooves with unequal pitches are respectively arranged, so that the rigidity of the tread can be effectively reduced, the drainage performance of the wetland is enhanced, the safety of the wetland is improved, the problem that loud resonance is easy to cause due to equidistant arrangement is avoided, and the aim of reducing noise is fulfilled; the first transverse groove penetrates through the main groove, and the second transverse groove penetrates through the whole inner shoulder rib, so that the drainage property of the tire is improved, and the rigidity is reduced; meanwhile, as the first cutter groove is adopted as the dividing line of the central rib, other cutter groove dividing lines are not arranged among the pitches, when the tire is started/braked/turned, compared with the traditional design of the cutter groove dividing line, the rigidity of each pitch pattern block is higher, the excessive deformation of the tread structure when the tread structure is contacted with the ground is reduced, and the performance of controlling, wearing, rolling resistance and the like of the tread structure can be effectively maintained while the riding comfort is improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a tread structure with asymmetric patterns provided in the present application;

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

Detailed Description

The following description of the embodiments of the present application will be made in detail, but not necessarily all embodiments, with reference to the accompanying drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the embodiments of 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 or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, 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 describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in embodiments of the present application will be understood in detail 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 is from the outside shoulder outline to the inside shoulder outline and is arranged with the outer tire shoulder rib 2, central rib and inner tire shoulder rib 3 separated by the longitudinal main groove 4 sequentially; the outer shoulder rib 2 is provided with a plurality of first transverse grooves 21 distributed around the circumference of the tread; the inner shoulder ribs 3 are provided with a plurality of second transverse grooves 31 distributed around the tread circumference; the first transverse grooves 21 are sequentially distributed at intervals according to a plurality of first pitches and penetrate through the adjacent longitudinal main grooves 4, so that the drainage performance of the tire is enhanced; the second transverse grooves 31 are sequentially distributed at intervals according to a plurality of second pitches, and both ends of the second transverse grooves penetrate through the inner shoulder ribs, namely one end of each second transverse groove penetrates through the adjacent longitudinal main groove 4, and the other end of each second transverse groove penetrates through the outside of the tread; while the first transverse groove 21 has a smaller groove width than the second transverse groove 31; the central rib is provided with a plurality of first sipes 5 distributed around the circumference of the tread and at unequal intervals; the first tool flutes 5 are arranged axially and obliquely, and at least one end penetrates through the adjacent longitudinal main grooves 4; the axial tilting arrangement is to tilt left and right about the tire rotation axis as a reference line.

The non-equidistant placement of the first transverse grooves 21, the second transverse grooves 31 and the first sipe 5 avoids resonance noise of the tire; meanwhile, the first cutter groove 5 penetrates through the longitudinal main groove 4 to further improve the drainage performance of the tire, and specifically, two sides of the first cutter groove penetrate through the longitudinal main groove 4, or only one side of the first cutter groove penetrates through the longitudinal main groove 4.

The above is an embodiment one of a tread structure provided by the present embodiment, and the following is an embodiment two of a tread structure provided by the present embodiment, please refer to fig. 1 specifically:

A tread structure, the tread structure is from the outline of the outer shoulder to the outline of the inner shoulder to arrange the outer shoulder rib 2, central rib and inner shoulder rib 3 separated by the longitudinal main groove 4 sequentially; the outer shoulder rib 2 is provided with a plurality of first transverse grooves 21 distributed around the circumference of the tread; the inner shoulder ribs 3 are provided with a plurality of second transverse grooves 31 distributed around the tread circumference; the first transverse grooves 21 are sequentially distributed at intervals according to a plurality of first pitches and penetrate through the adjacent longitudinal main grooves 4, so that the drainage performance of the tire is enhanced; the second transverse grooves 31 are sequentially distributed at intervals according to a plurality of second pitches, and both ends of the second transverse grooves penetrate through the inner shoulder ribs, namely one end of each second transverse groove penetrates through the adjacent longitudinal main groove 4, and the other end of each second transverse groove penetrates through the outside of the tread; while the first transverse groove 21 has a smaller groove width than the second transverse groove 31; the central rib is provided with a plurality of first sipes 5 distributed around the circumference of the tread and at unequal intervals; the first tool flutes 5 are arranged axially and obliquely, and at least one end penetrates through the adjacent longitudinal main grooves 4; the axial tilting arrangement is to tilt left and right about the tire rotation axis as a reference line.

Further, the first pitch is 3-5, and the second pitch is 3-5; a plurality of first pitches and second pitches; i.e. the outer shoulder rib 2, a plurality of first pitches are arranged; on the inner shoulder rib 3, a plurality of each second pitch is provided.

Further, the first pitch seed number is equal to the second pitch seed number and corresponds to each other one by one; any one of the first pitches is larger than a corresponding one of the second pitches.

Specifically, the noise in the tire running process is optimized due to the existence of multiple pitches, and the resonance problem is effectively avoided; conventionally set to 3-5 pitches, each width of pitch comprising a plurality of numbers; in this embodiment, the number of the seeds of the first pitch is equal to the number of the seeds of the second pitch, and corresponds to one.

Taking 3 kinds of the ribs as examples, 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 larger than N1, W2 is larger than N2, and W3 is larger than N3, so that the grounding area of the outer shoulder rib 2 is larger than that of the inner shoulder rib 1, and the operability is better.

Further, the depth of each first sipe 5 is not equal at different positions, and the depth of both ends of the first sipe 5 is smaller than the depth of the middle.

Further, 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 of the plurality of center ribs is arranged similarly to the first pitch and the second pitch, and is protected with a plurality of pitches, specifically such that the pitch of the center ribs near the inner side is smaller than the pitch of the corresponding center ribs near the outer side.

Further, in this embodiment, the number of the central ribs is 3, and the first central rib 11, the second central rib 12 and the third central rib 13 are respectively arranged along the outer shoulder rib 2 toward the inner shoulder rib.

Further, the first sipe 5 is inclined from the upper direction to the lower direction with its one end close to the inner shoulder rib 3 being above and with its one end close to the outer shoulder rib 2 being below.

Further, the first knife groove 5 on the first center rib 11 axially penetrates through the first center rib 11, two sides of the first knife groove are communicated with the longitudinal main groove 4, and the groove edge is provided with a trimming edge 7;

the first knife groove 7 on the second center rib 12 is provided with a wedge angle notch 6 near one end of the outer shoulder rib 2, and the groove edge is provided with a trimming edge 7;

The first knife groove 7 on the third center rib 13 axially penetrates through the third center rib 13, a wedge angle notch 6 is arranged at one end, close to the outer shoulder rib 2, of the third center rib, and a trimming edge 7 is arranged at one end, close to the inner shoulder rib 3, of the third center rib.

Providing the cut edges 7 on the first sipe 5 enhances the wet land drainage; meanwhile, the wedge angle notch is more beneficial to the tire to puncture a water film, so that early-stage abrasion of the end part is prevented, and noise is optimized.

In this embodiment, the first sipe 5 on the first center rib 11 has a smaller inclination angle than the other ribs, so that no wedge angle notch is provided; specifically, in other embodiments, other arrangements may be performed on the first sipe 5 disposed on different center ribs according to different road conditions of different vehicles, for example, wedge angle notches may be disposed at the left and right ends of the first sipe 5 on the center rib.

Further, second tool grooves 22 are arranged between every two first transverse grooves 21, one end of each second tool groove 22 penetrates through the longitudinal main groove 4, and a wedge angle notch 6 is formed at the end of each second tool groove; the other end is connected to the outside of the outer shoulder rib 2;

The second tool grooves are slender patterns, so that the rigidity of the outer tire shoulder ribs 2 is effectively reduced, the turning control performance is improved, the second tool grooves can be mutually supported when the tire tread is deformed, and the situation of excessive deformation is reduced.

Further, the first knife groove 5 is embedded with a small steel sheet, so that the rigidity of the central rib is reduced within a certain range, and the riding comfort is improved.

Further, the inner channel wall of the longitudinal main channel 4 has a certain inclination angle;

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

Further, the width of the longitudinal main groove 4 at the outer side of the tire is smaller than that of the main groove 4 at the inner side, so that the grounding area of the outer 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 designed to be multi-segment arc anti-eccentric wear, and the edge of the groove is provided with the trimming 7, and meanwhile, one end of the second transverse groove 31, which is communicated with the longitudinal main groove 4, is provided with the trimming 7, so that the drainage performance is further enhanced, the abnormal wear condition of the tire in the early use period is reduced, and the aesthetic property is improved.

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

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

Further, the width of each first sipe 5 is less than 8mm; the width of the longitudinal main groove 4 may be 8mm to 16mm.

Further, the ratio of the width of the central rib to the width of the whole tread is between 0.45 and 0.6; the width of the shoulder rib 31 is between 0.18 and 0.25 of the whole tread width, and the width of the shoulder rib 2 is larger than the width of the shoulder rib 3 by adjusting the groove width of the longitudinal main groove 4.

The tread of the whole tire adopts an asymmetric design, the groove edges of the first transverse groove 21 and the second transverse groove 31 adopt a multi-segment arc eccentric wear prevention design along the line, the shape of a grounding trace and the distribution of grounding stress at the tire shoulder are optimized, the early abrasion at the tire shoulder is prevented, and the control stability of the tire is enhanced.

While the tread structure and the tire provided by the present application have been described in detail, those skilled in the art will appreciate that the present application is not limited to the specific embodiments and applications described above, based on the concepts of the embodiments of the present application.

Claims (8)

1. The tread structure is characterized in that an outer shoulder rib, a center rib and an inner shoulder rib which are separated by a longitudinal main groove are sequentially arranged in the tread structure 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 tread;

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

the first transverse grooves are sequentially distributed at intervals according to various first pitches and penetrate through adjacent longitudinal main grooves;

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

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 cutter grooves which are distributed around the circumference of the tread and are not equally spaced;

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

The central ribs comprise 3 ribs, and a first central rib, a second central rib and a third central rib which are separated by the longitudinal main groove are respectively formed along the direction from the outer shoulder rib to the inner shoulder rib in sequence;

the first knife groove on the first center rib axially penetrates through the first center rib, and the edges of the grooves on two sides are provided with cut edges;

A wedge angle notch is formed in one end, close to the outer shoulder rib, of the first knife groove on the second center rib, and trimming edges are arranged on the two edge grooves;

The first knife groove on the third center rib axially penetrates through the third center rib, a wedge angle notch is also arranged at one end, close to the outer shoulder rib, of the third center rib, and a trimming edge is also arranged at one end edge, close to the inner shoulder rib;

And one end of the first knife groove close to the inner shoulder rib is arranged above, and one end of the first knife groove close to the outer shoulder rib is arranged below and is inclined from top to bottom.

2. A tread construction according to claim 1, wherein the first pitch is 3-5;

The number of the second pitches is 3-5;

A plurality of each of the first pitches and each of the second pitches.

3. A tread construction according to claim 2, wherein the first pitch number is equal to the second pitch number and corresponds one to one;

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

4. A tread construction according to claim 1, wherein the first transverse grooves are provided with second sipes between each other;

one end of each of two ends of the second cutter groove penetrates through the adjacent main groove, and a wedge angle notch is formed in the end;

the other end of the second knife groove penetrates through the outer tire shoulder rib to be communicated with the outer side of the tire.

5. A tread construction according to claim 1 wherein the first sipe intermediate portion has a depth greater than the depth of the two ends and is internally inlaid with steel.

6. A tread construction according to claim 1, wherein the longitudinal main grooves have tangential groove walls;

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

7. The tread structure of claim 1, wherein the grooves of the first and second lateral grooves are bordered by arcs of a plurality of arcs;

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

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

8. A tire, characterized in that the tread of the tire is provided with a tread structure as claimed in any one of claims 1 to 7.