CN104149553B - A kind of have the fixing rib tire turned to - Google Patents

Abstract

The invention discloses and a kind of have the fixing rib tire turned to, the installation of this tire has fixed-direction.Tire centerline circumference rib and two annular ribs grooves composition tyre surface central areas, tyre surface central area the S shape that extends of taking advantage of a situation to shoulder region, C-shaped decorative pattern groove are split to form as shoulder zone.Between S shape and C-shaped groove are formed, it is provided with three arch decorative pattern grooves, connection annular ribs groove and C-shaped decorative pattern groove, is being provided with only connection S shape and an arch decorative pattern groove for C-shaped decorative pattern groove near edge, sidewall.Tread contour is combined as single pitch with S shape decorative pattern groove and C-shaped decorative pattern groove, on the white space at different pitch decorative pattern intervals, is provided with the sharp knife shape decorative pattern groove of two arcs and anti-skidding fine groove.The oriented rib tire of the present invention has fixing rotation direction, does not the most affect tire ground connection performance, and can reduce resistance to water-flow, accelerates drainage speed, it is provided that excellent wetland and the non-skid property on hydrops road surface.

Description

A kind of have the fixing rib tire turned to

Technical field

The present invention relates to the rib tire of a kind of oriented rolling, be exactly bionical oriented rib tire, it is possible to promote the rib tire of tire anti-slide performance by reducing resistance to water-flow.

Background technology

Along with improving constantly of road speed, people are to safety concerns, comfortableness and handling etc. propose strict requirements, it is desirable to automobile not only has the maneuvering performance of excellence on face, main line, wet and slippery and hydrops road surface operation stabilization is proposed requirement simultaneously.In recent years, European Union has promulgated EC1222/2009 " about fuel efficiency and the tire tag of other parameters ", clearly proposes the wet road surface of relevant tire and grasps performance rate and noise grade etc..Similar regulation has started to implement in Japan, and the U.S. also will implement in the near future." the green tire technical specification " of China will be issued and implemented.

Running car is on hydrops road surface, if the groove internal water accumulation of tire and contact area, road surface can not be discharged when maybe cannot discharge in time, the flowing pressure that access area produces will make tire progressively disengage with road surface to contact, until generation " water skiing ".Now, tire drastically declines with road surface adhesion property, and vehicle loses manipulation ability, has a strong impact on traffic safety.Tread pattern structure pattern is one of principal element affecting tire antiskid aqueous energy.Wherein, groove mainly plays guiding and drain function, and the size of groove drainability directly influences tire wet-sliding resistant performance.In groove, water velocity is the biggest, and unit interval internal drainage amount is the biggest, and the antiskid aqueous of tire can be the highest, and the critical velocity that hydroplaning occurs is the biggest.For this, occur in that the pattern structure design patent of various ways and document are to improve tire antiskid aqueous energy, as United States Patent (USP) US 7806156 B2 improves tyre tread antiskid aqueous energy by amendment decorative pattern layout, United States Patent (USP) US7290578 B2 promotes tire antiskid aqueous energy by the way of amendment pattern block structure increases decorative pattern drainability.Chinese patent 200820114662.1 improves decorative pattern drainability by tread pattern structure carries out Bionic Design, and Chinese patent 201210085734.5 proposes groove wall and arranges bionic, non-smooth structure lifting groove current handling capacity.But, abovementioned technology improves mainly for tread contour partial structurtes, and the measure to decorative pattern integral structure layout is relatively fewer, so shows slightly under the requirement to lifting tire antiskid aqueous energy and lacks of staying power.

Summary of the invention

It is contemplated that propose a kind of there is the fixing rib tire turned to, it is possible to guide surface gathered water to pass through, reduce groove trough wall surface resistance when current pass through, improve groove displacement, thus reduce tyre surface by current flowing pressure effect simultaneously.This tire tread is when hydrops road traveling, it is provided that good wet-sliding resistant performance, it is ensured that vehicle safety when the tire rainy day travels.

For achieving the above object, the present invention adopts the following technical scheme that

There is the fixing rib tire turned to, its tread contour mainly includes S shape decorative pattern groove and C-shaped decorative pattern groove and auxiliary arch drainage groove on central authorities' decorative pattern rib and adjacent with this two rectangular flower groove grooves, pattern block on tire shoulders, and drainage groove and the anti-skidding fine groove with the distribution of sharp knife shape combine.Central authorities' decorative pattern rib rotates in a circumferential direction along tire and forms, and offers the auxiliary lateral trench of diamond shaped in its side.

Central authorities' decorative pattern rib is along tire circumference longitudinal integral type ribs of a week, is separated by rectangular flower groove groove between central authorities' decorative pattern rib and remaining tread block.At sidewall area, the arch pattern block being connected with rectangular flower groove groove be taken advantage of a situation to shoulder region by tyre surface central area extend S shape decorative pattern groove, C-shaped decorative pattern groove is split to form.On rotating direction, S shape decorative pattern groove and C-shaped groove groove on the big pattern block with fish tail fin-shaped formed, it is provided with four arch drainage grooves, pattern block is divided into several little pattern blocks.Wherein three arch drainage groove one end near tyre surface central authorities decorative pattern rib are connected with rectangular flower groove groove, and present the rounding off at tip, and the other end is connected with C-shaped decorative pattern groove；Arch drainage groove near position, sidewall does not connects with the rectangular flower groove groove at tyre surface center, is only connection S shape decorative pattern groove and C-shaped decorative pattern groove.

Center running lug is provided with the lateral trench of rhombus, can play the effect that collateral branch's pipe is eliminated the noise.The width of this transverse pattern groove is 4 6mm, the 30 50% of a length of center running lug width, and centrage becomes 10 °-20 ° with tire axial.Under the effect of being squeezed of rolling tire decorative pattern, it is possible to interference rectangular flower groove groove internal gas flow, thus reduce the radiation of annular ribs ditch gas column resonance noise.Meanwhile, the existence of lateral trench can reduce the stress concentration of central tire decorative pattern.The existence of lateral trench makes to present inside center running lug discontinuity, it is possible at tire radial compression applied incision one's water breaks film, and hydrops more preferably more thoroughly by the lateral trench draining being connected with rectangular flower groove groove, improves the antiskid outlet capacity of tire.

On rotating direction, 3 arch channel near tyre surface central authorities decorative pattern rib connect with rectangular flower groove groove, effectively play access area surface gathered water shunting, increase decorative pattern groove drain discharge.Only connecting S shape and the drainage groove of C-shaped decorative pattern groove at tire shoulder, the existence of this drainage groove can effectively reduce the rigidity of shoulder region pattern block, plays good steering manipulation ability.While big pattern block offers drainage groove, it is possible to the energy that when getting rid of tire high speed scroll in time, decorative pattern produces, improve splendid heat dissipation characteristics.The existence of decorative pattern cutter groove, on the premise of effectively heat radiation, it is possible to reduce the rigidity of tread block, it is provided that enough grabs ground ability and vehicle riding comfort.Its sharp slot wedge, it is possible to destroy rapidly moisture film, it is ensured that the effective grounding of tire, it is provided that tire earth-grasping force on dry, wet road surface and stability.

C-shaped decorative pattern groove and a single pitch of S shape decorative pattern groove composition tread contour, whole tire tread decorative pattern is that circumference is equidistantly evenly distributed on tread area on the basis of this single pitch；

Along tire rolling direction, the tyre surface between the S shape decorative pattern groove of C-shaped decorative pattern groove and a single pitch is provided with one section of tire shoulder white space；On tire prison white space, it is provided with the arc-shaped sharp knife decorative pattern groove extended from tyre surface mediad shoulder region, pattern block big for shoulder region is divided into three each and every one little pattern blocks, and on this pattern block, offer anti-skidding thin cutter groove, wherein one end of thin cutter groove and tyre surface center rectangle decorative pattern groove, one end connects with sharp knife decorative pattern groove, and the radian of the two is consistent.Thin cutter groove depth is 1 3mm, and width is 2 3mm, and the groove depth of sharp knife shape is equal to two arch groove depth, and its width is 40% the 50% of pattern block on tire shoulder width.Tyre surface is mainly separated by the existence of thin cutter groove and sharp knife groove, while taking into account tyre tread antiskid water, it is ensured that when tire bears load, increase the bearing capacity of tread contour, that improves tire grabs ground ability, and then improves the tire operational stability on dry and wet ground.

The circumferentially distributed arch decorative pattern groove of pattern block on tire shoulder and tyre surface rectangular flower groove groove junction are provided with the reinforcement of projection, by rectangular flower groove groove to transverse pattern groove transition, shoulder region pattern block can be reinforced, reduce resistance to rolling, improve impact resistance and the wearability of tyre tread.

Optimizing the arrangement of, in conjunction with physical dimension and the angle of decorative pattern groove, scientific allocation and sizing material optimization of decorative pattern groove and pattern block, it is possible to ensure that the hardness of pattern block is impartial, make earth-catching property and the steering behaviour Proper Match of tire, improve the combination property of tire；The rational deployment increasing auxiliary transverse pattern groove and groove can be effectively improved tire antiskid aqueous energy and reduce study on tire pattern noise；

The present invention has the fixing rib tire turned to, and the circumferential groove being mainly connected with tyre surface center annular ribs ditch by increase changes access area water (flow) direction, reduces resistance to water-flow, promotes drainage speed, improves the antiskid aqueous energy of tire.Simultaneously, by guiding annular ribs ditch airflow diversion effect, annular ribs ditch gas column resonance noise is reduced while improving tyre tread drainability, at tire shoulder, the connection of transverse pattern reduces the generation of pumping noise, there is good braking ability and stable operation performance simultaneously, and good looking appearance is generous.

Accompanying drawing explanation

Fig. 1 is the pattern structure on tire tread two-dimensional development figure of the present invention.

Fig. 2 is the pattern structure on tire tread partial 3-D view of the present invention.

Fig. 3 is the resistance coefficient scattergram that existing groove wall is subject to.

Fig. 4 is the resistance coefficient scattergram that groove wall of the present invention is subject to.

Fig. 5 is the flowing pressure scattergram that existing groove wall is subject to.

Fig. 6 is the flowing pressure scattergram that groove wall of the present invention is subject to.

In figure, 1, central authorities decorative pattern rib；2, rectangular flower groove groove；3, auxiliary transverse pattern groove；4, S shape decorative pattern groove；5, C-shaped decorative pattern groove；6, arch decorative pattern groove；7, arch decorative pattern groove 7；8, arch decorative pattern groove 8；9, arch decorative pattern groove 9；10, sharp knife shape decorative pattern groove；11, anti-skidding thin cutter groove；12, reinforcement.

Detailed description of the invention

The technical measures implementing above-mentioned purpose of the present invention and use are as described below:

The oriented rib tire of the present invention is adapted to high-performance motion car, installs and has fixed-direction.

As it is shown in figure 1, tire tread is divided into decorative pattern central area and shoulder zone two parts.Wherein, in the flower in heart region, along tire axial width, tire tread center is provided with a central decorative pattern rib 1 circumferentially, and the width of central authorities' decorative pattern rib 1 accounts between the 5%-6% of tyre surface axial width, and the height of central authorities' decorative pattern rib 1 is 8-10mm；Be provided with the rectangular flower groove groove 2 of extremely strong drain function along tire circumferential direction in central authorities decorative pattern rib 1 left and right sides, the degree of depth of rectangular flower groove groove 2 is equal to the height of central authorities' decorative pattern rib 1, and width accounts between the 4%-5% of tyre surface axial width.Central authorities' decorative pattern rib 1 and two the rectangular flower groove grooves 2 being close to this form tread contour central area, and the tread portion of both sides, tread contour central area is shoulder zone.

In the ground connection front end of rotating direction, it is provided with the S shape decorative pattern groove 4 extended by tyre surface central area to shoulder zone；S shape decorative pattern groove 4 is with core rib 1 as axis of symmetry, and symmetrical is distributed in both sides shoulder zone.S shape decorative pattern groove 4 is made up of the circular arc of three radius of curvature respectively R1, R2, R3, R1 is 210 215mm, R2 is 230 235mm, R3 is 130 135mm, radius of curvature is that the circular arc of R1 is tangent with 60 ° of angles with rectangular flower groove groove (2), radius of curvature be the arc length of R1 be 12% the 15% of tread width, radius of curvature be the arc length of R2 be 26% the 28% of tire tread width, radius of curvature be the arc length of R3 be 16% the 18% of tire tread width.S shape decorative pattern groove width in tire circumferential direction is 6-8mm, the degree of depth is 8-10mm.

As it is shown in figure 1, in rotating direction ground connection rear end, along central authorities' decorative pattern rib 1 on the 84mm position of S shape decorative pattern groove 4, be provided with the C-shaped decorative pattern groove 5 extended by tyre surface central area to shoulder zone；C-shaped decorative pattern groove 5 is with core rib 1 as axis of symmetry, and symmetrical is distributed in both sides shoulder zone.C-shaped decorative pattern groove 5 is made up of the circular arc of two sections of radius of curvature respectively R4, R5, R4 is 120mm 125mm, R5 is 110mm 115mm, radius of curvature is that R4 is tangent with 75 ° of angles with rectangular flower groove groove 2, radius of curvature is 18% the 20% of a length of tread width of the circular arc of R4, and radius of curvature is 36% the 40% of a length of tread width of the circular arc of R5；C-shaped decorative pattern groove width in tire circumferential direction is 6 8mm, the degree of depth is 8 10mm.

As shown in Figure 1, S shape decorative pattern groove 4 and C-shaped decorative pattern groove 5 and with longitudinal rectangle groove groove 2 around fish tail fin-shaped pattern block on, it is provided with four arch decorative pattern grooves, respectively arch decorative pattern groove 6, arch decorative pattern groove 7, arch decorative pattern groove 8 and arch decorative pattern groove 9.The radius of curvature R 6 of arch decorative pattern groove 6 is 35-40mm, and width is 4-6mm, and the degree of depth is 8-10mm；The radius of curvature R 7 of arch decorative pattern groove 7 is 95-105mm, and width is 4-6mm, and the degree of depth is 8-10mm；The radius of curvature R 8 of arch decorative pattern groove 8 is 240-250mm, and width is 4-6mm, and the degree of depth is 8-10mm；The radius of curvature R 9 of arch decorative pattern groove 9 is 115-125mm, and width is 3-5mm, degree of depth 8-10mm；

Arch decorative pattern groove 6, arch decorative pattern groove 7 are connected with the rectangular flower groove groove 2 of tyre surface middle section with one end of arch decorative pattern groove 8, and are connected with rectangular flower groove groove 2 with rounding off state；The rectangular flower groove groove 2 of the tyre surface central area between S shape decorative pattern groove 4 and C-shaped decorative pattern groove is divided into quarter by arch decorative pattern groove 6, arch decorative pattern groove 7, arch decorative pattern groove 8；Meanwhile, the other end of arch decorative pattern groove 6, arch decorative pattern groove 7 and arch decorative pattern groove 8 is connected with C-shaped decorative pattern groove 5.

S shape decorative pattern groove 4 and C-shaped decorative pattern groove 5 and with longitudinal rectangle groove groove 2 around fish tail fin-shaped pattern block on, at shoulder region away from central tire decorative pattern rib 1, one end of arch decorative pattern groove 9 and S shape decorative pattern groove join in radius of curvature R 3 and the transition position of radius of curvature R 4, the other end is connected with C-shaped decorative pattern groove 5, this junction point distance tire sidewall edge 15-20mm.In C-shaped decorative pattern groove 5 part arc length between rectangular flower groove groove 2 to arch decorative pattern groove 9 and C-shaped decorative pattern groove 5 junction point, arch decorative pattern groove 6, arch decorative pattern groove 7 and arch decorative pattern groove 8 by the circular arc of the C-shaped decorative pattern groove 5 of this part along tire axial width quarter.Multiple arch decorative pattern groove is set on above-mentioned tail fin shape pattern block, can not only play and cut through moisture film, the feature of shunting annular ribs ditch flow, improve tire antiskid aqueous energy, and fluid motion stress can be reduced, reduce the compression to air, reduce the high-frequency noise of rolling tire, quiet comfortable, safe environment is provided to driver, the existence of arch groove not only increases the antiskid aqueous energy of tire, and pattern block rigidity is also had effect of optimization, be conducive to improving decorative pattern deformation, increase the traveling of tire handling and accelerate, braking ability.

As it is shown in figure 1, along tire rolling direction, along tire rolling direction, C-shaped decorative pattern groove 5 and S shape decorative pattern groove 4 forms a single pitch of tread contour；The 15-16% of a length of tire overall diameter of single pitch, whole tire tread decorative pattern is that circumference is equidistantly evenly distributed on tread area on the basis of this single pitch.

As it is shown in figure 1, the tyre surface between the S shape decorative pattern groove 4 of C-shaped decorative pattern groove 5 and a single pitch is provided with one section of tire shoulder white space；On tire shoulder white space, being provided with two the sharp knife shape decorative pattern grooves 10 and anti-skidding thin cutter groove 11 extended to shoulder zone from tyre surface central area, the decorative pattern of shoulder zone is divided into three equal parts, spacing is 35mm.Anti-skidding thin cutter groove 11 and rectangular flower groove groove 2 are tangent with 75 ° of angles, and the radius of curvature R 11 of anti-skidding thin cutter groove 11 is 180-190mm, the 12%-14% that arc length is tread width of anti-skidding thin cutter groove 11, and the width of anti-skidding thin cutter groove 11 is 2-4mm, and the degree of depth is 3-5mm；Sharp knife shape decorative pattern groove 10 extends to tire sidewall edge from one end of anti-skidding thin cutter groove 11, and its radius of curvature R 10 is equal with radius of curvature R 9, and the width of sharp knife shape decorative pattern groove 10 is 6-8mm, and the degree of depth is 8-10mm.Sharp knife shape decorative pattern groove 10 and anti-skidding fine groove 11 are with tyre surface central rib decorative pattern 1 as axis of symmetry, and symmetrical is distributed in both sides shoulder zone.Above-mentioned sharp knife shape groove 10 and the existence of anti-skidding fine groove 11, not only ensure that shoulder region can effectively cut through moisture film and drain the water away, there is the antiskid aqueous energy on good wet-skid road surface handling and hydrops road surface, and refined pattern block on tire shoulder, the reasonably optimizing stiffness distribution of shoulder region pattern block, to improving tire steering behaviour, reducing noise and all have directly help.

As it is shown in figure 1, for reducing the generation of noise in rolling tire driving process, the side of central authorities' decorative pattern rib 1 is provided with the auxiliary transverse pattern groove 3 of diamond shaped.The centrage of auxiliary transverse pattern groove 3 becomes 10 °-20 ° with tire circumferential direction, the auxiliary transverse pattern groove 3 a length of 3-5mm in tire circumferential direction, width along tire axial direction is the 30-50% of central authorities' decorative pattern rib 1 width, the degree of depth is the 80%-90% of central authorities' decorative pattern rib 1 height.

As shown in Figure 1, for making the water movement in rectangular flower groove groove 2 smooth and easy, give full play to the drainability of tread contour groove, S shape decorative pattern groove 4 and C-shaped decorative pattern groove 5 rectangular flower groove groove 2 with tyre surface central area respectively forms the rounding off at tip, so effectively rectangular flower groove groove current can be played shunting action, increase the drainability of decorative pattern groove, thus improve wetland pull strength and prevent hydroplaning.

As it is shown in figure 1, S shape decorative pattern groove 4, C-shaped decorative pattern groove 5 and arch decorative pattern groove 6, arch decorative pattern groove 7 and arch decorative pattern groove 8 are being provided with reinforcement 12 with longitudinal rectangle groove groove 2 junction.The height of reinforcement 12 is 1-2mm, and the width on tire axial direction is 3-5mm.The existence of reinforcement 12 can reinforce shoulder region pattern block, reduces resistance to rolling, improves impact resistance and the wearability of tyre tread

Know-why for the present invention, separately design the pattern structure in tire access area with identical groove sump volume, on the premise of water velocity is identical, using Fluid Mechanics Computation (CFD) that different groove resistances to water-flow and wall flowing pressure have been carried out numerical simulation prediction, result of calculation is as shown in Figure 4 and Figure 6.

Fig. 3 is the current of the identical incoming flow conditions of wall surface resistance coefficient of original pattern structure, when through identical groove sump volume, and the resistance coefficient (because pattern structure is symmetrical, taking its half is object of study) that the groove wall of different Pattern Design is subject to；From Fig. 3,4, under identical streamflow regime, the wall surface resistance coefficient of original pattern structure is 492.6, the tread pattern structure wall surface resistance coefficient of the present invention is 443.8, by contrast it appeared that the oriented rib tire of the present invention can effectively reduce water flows through the resistance coefficient of out-of-date groove trough wall surface, improve current Negotiation speed.

Fig. 5,6 it is the current of identical incoming flow conditions, when through identical groove sump volume, the flowing pressure (because pattern structure is symmetrical, taking its half is object of study) that the groove wall of different Pattern Design is subject to；From Fig. 5,6, under identical streamflow regime, the wall maximum flowing pressure of original pattern structure is 89011.6Pa, the wall maximum flowing pressure of the tread pattern structure of the present invention is 78469.2Pa, by contrast it appeared that the oriented rib tire of the present invention can effectively reduce water flows through the flowing pressure that out-of-date groove trough wall surface is subject to, reduce the current lift to tire, improve tire antiskid aqueous energy.

Being shown by result of calculation Fig. 4 and Fig. 6, the oriented pattern structure of the present invention can effectively reduce resistance to water-flow coefficient, accelerates groove current Negotiation speed, simultaneously, reduce the current flowing pressure to groove wall, reduce the water flow impact pressure that tire is subject to, improve tire antiskid aqueous energy.

Claims (5)

1. one kind has the fixing rib tire turned to, it is characterised in that described tire tread is divided into decorative pattern central area and shoulder zone；Along tire axial width, tire tread center is provided with a central decorative pattern rib (1) along tire circumference, and the width of central authorities' decorative pattern rib (1) accounts between the 5%-6% of tyre surface axial width, and the height of central authorities' decorative pattern rib (1) is 8-10mm；It is provided with rectangular flower groove groove (2) along tire circumferential direction in central authorities decorative pattern rib (1) left and right sides, the degree of depth of rectangular flower groove groove (2) is equal to the height of central authorities' decorative pattern rib (1), and the width of rectangular flower groove groove (2) accounts between the 4%-5% of tyre surface axial width；Central authorities' decorative pattern rib (1) and two rectangular flower groove groove (2) the composition tread contour central areas being close to this, the tread portion of both sides, tread contour central area is shoulder zone；

In the ground connection front end of rotating direction, being provided with S shape decorative pattern groove (4) extended by tread contour central area to shoulder zone, described S shape decorative pattern groove (4) is with core rib (1) as axis of symmetry, and symmetrical is distributed in both sides shoulder zone；S shape decorative pattern groove (4) is made up of the circular arc of three radius of curvature respectively R1, R2, R3, R1 is 210 215mm, R2 is 230 235mm, R3 is 130 135mm, radius of curvature is that the circular arc of R1 is tangent with 60 ° of angles with rectangular flower groove groove (2), radius of curvature be the arc length of R1 be 12% the 15% of tread width, radius of curvature be the arc length of R2 be 26% the 28% of tread width, radius of curvature be the arc length of R3 be 16% the 18% of tire tread width；The width of S shape decorative pattern groove (4) is 6-8mm, the degree of depth is 8-10mm；In rotating direction ground connection rear end, along the 84mm position of central authorities' decorative pattern rib (1) distance S shape decorative pattern groove (4), it is provided with C-shaped decorative pattern groove (5) extended by tyre surface central area to shoulder zone, C-shaped decorative pattern groove (5) is with central authorities' decorative pattern rib (1) as axis of symmetry, and symmetrical is distributed in both sides shoulder zone；C-shaped decorative pattern groove (5) is made up of the circular arc of two radius of curvature respectively R4, R5, R4 is 120mm 125mm, R5 is 110mm 115mm, radius of curvature is that the circular arc of R4 is tangent with 75 ° of angles with rectangular flower groove groove (2), radius of curvature is 18% the 20% of a length of tread width of the circular arc of R4, and radius of curvature is 36% the 40% of a length of tread width of the circular arc of R5；The width of C-shaped decorative pattern groove is 6 8mm, the degree of depth is 8 10mm；

Between S shape decorative pattern groove (4) and C-shaped decorative pattern groove (5), be provided with four arch decorative pattern grooves, respectively arch decorative pattern groove A(6), arch decorative pattern groove B(7), arch decorative pattern groove C(8) and arch decorative pattern groove D(9)；Arch decorative pattern groove A(6) radius of curvature R 6 be 35-40mm, width is 4-6mm, and the degree of depth is 8-10mm；Arch decorative pattern groove B(7) radius of curvature R 7 be 95-105mm, width is 4-6mm, and the degree of depth is 8-10mm；Arch decorative pattern groove C(8) radius of curvature R 8 be 240-250mm, width is 4-6mm, and the degree of depth is 8-10mm；Arch decorative pattern groove D(9) radius of curvature R 9 be 115-125mm, width is 3-5mm, degree of depth 8-10mm；

Arch decorative pattern groove A(6), arch decorative pattern groove B(7), arch decorative pattern groove C(8) one end be connected with rectangular flower groove groove (2) of tyre surface central area, and be connected with rectangular flower groove groove (2) with rounding off state；Arch decorative pattern groove A(6), arch decorative pattern groove B(7), arch decorative pattern groove C(8) rectangular flower groove groove (2) of the tyre surface central area between S shape decorative pattern groove (4) and C-shaped decorative pattern groove (5) is divided into quarter；Arch decorative pattern groove A(6), arch decorative pattern groove B(7), arch decorative pattern groove C(8) the other end be connected with C-shaped decorative pattern groove (5)；

Arch decorative pattern groove D(9) one end join with S shape decorative pattern groove (4) and be connected district in radius of curvature R 3 and radius of curvature R 4, the other end is connected with C-shaped decorative pattern groove (5), this junction point distance tire sidewall edge 15-20mm；At rectangular flower groove groove (2) to arch decorative pattern groove D(9) and C-shaped decorative pattern groove (5) junction point between C-shaped decorative pattern groove (5) part arc length on, arch decorative pattern groove A(6), arch decorative pattern groove B(7) and arch decorative pattern groove C(8) by the circular arc of C-shaped decorative pattern groove (5) of this part along tire axial width quarter；

Along tire rolling direction, C-shaped decorative pattern groove (5) and S shape decorative pattern groove (4) form a single pitch of tread contour；The 15-16% of a length of tire overall diameter of single pitch, whole tire tread decorative pattern is that circumference is equidistantly evenly distributed on tread area on the basis of this single pitch；Tyre surface between S shape decorative pattern groove (4) of C-shaped decorative pattern groove (5) and a single pitch is provided with one section of tire shoulder white space；

On tire shoulder white space, it is provided with two fine grooves being made up of sharp knife shape decorative pattern groove (10) and anti-skidding thin cutter groove (11) from tyre surface central area to shoulder zone, the pattern block of tire shoulder white space is divided into three equal parts, anti-skidding thin cutter groove (11) is tangent with 75 ° of angles with rectangular flower groove groove (2), the radius of curvature R 11 of anti-skidding thin cutter groove (11) is 180-190mm, the 12%-14% that arc length is tread width of anti-skidding thin cutter groove (11), the width of anti-skidding thin cutter groove (11) is 2 4mm, and the degree of depth is 3-5mm；Sharp knife shape decorative pattern groove (10) extends to tire sidewall edge from one end of anti-skidding thin cutter groove (11), and its radius of curvature R 10 is equal with radius of curvature R 9, and width is 6-8mm, and the degree of depth is 8-10mm；The fine groove that sharp knife shape decorative pattern groove (10) and anti-skidding thin cutter groove (11) form is with central authorities' decorative pattern rib (1) as axis of symmetry, and symmetrical is distributed in both sides shoulder zone.

The most according to claim 1 a kind of have the fixing rib tire turned to, it is characterised in that is provided with auxiliary transverse pattern groove (3) of diamond shaped on the side of described central authorities' decorative pattern rib (1)；The centrage of auxiliary transverse pattern groove (3) becomes 10 °-20 ° with tire circumferential direction, auxiliary transverse pattern groove (3) a length of 3-5mm in tire circumferential direction, width along tire axial direction is the 30-50% of central authorities' decorative pattern rib (1) width, and the degree of depth is the 80%-90% of central authorities' decorative pattern rib (1) height.

The most according to claim 1 a kind of have the fixing rib tire turned to, it is characterised in that described S shape decorative pattern groove (4) becomes the rounding off at tip respectively with C-shaped decorative pattern groove (5) with tyre surface rectangular flower groove groove (2).

The most according to claim 1 a kind of have the fixing rib tire turned to, it is characterised in that described anti-skidding thin cutter groove (11) is connected with rounding off state with rectangular flower groove groove (2).

The most according to claim 1 a kind of have the fixing rib tire turned to, it is characterized in that, described S shape decorative pattern groove (4), C-shaped decorative pattern groove (5) and arch decorative pattern groove A(6), arch decorative pattern groove B(7) and arch decorative pattern groove C(8) be provided with reinforcement (12) with longitudinal rectangle groove groove (2) junction, the height of reinforcement (12) is 1-2mm, and the width on tire axial direction is 3-5mm.