CN104275987A - Pneumatic tyre - Google Patents

Pneumatic tyre Download PDF

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Publication number
CN104275987A
CN104275987A CN201410142757.4A CN201410142757A CN104275987A CN 104275987 A CN104275987 A CN 104275987A CN 201410142757 A CN201410142757 A CN 201410142757A CN 104275987 A CN104275987 A CN 104275987A
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China
Prior art keywords
edge
pattern block
wall
tire
towards
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CN201410142757.4A
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CN104275987B (en
Inventor
末吉裕介
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Abstract

The invention provides a pneumatic tyre which is able to further provide increased performance on a snowy road and to provide improved wearing prevention performance. The surface (2) of the pneumatic tyre is provided with a first pattern blocks (12) carved by horizontal ditches (4). Each pattern block comprises a pedaling face, a pattern block wall face (13) and an edge (14). The edge comprises a tooth gear part (18). The tooth gear part comprises a first edge (15), a second edge (16) and a third edge. The second edge is connected with one end (15A) of the first edge. The third edge is connected with the other end (15B) of the first edge. The other end is arranged at a position more nearer to the gravity center of the first pattern block of the one side. The pattern block wall comprises a first wall face, a second wall face, a third wall face and a fourth wall face; the fourth wall face is mounted between the first wall face and the third wall face; the first wall face is in an almost triangle shape enclosed by the first edge extending from the first wall face, the second edge extending from the ditch bottom and the third edge extending from the third wall face.

Description

Air-inflation tyre
Technical field
The present invention relates to the air-inflation tyre at fetus face with the pattern block marked off by multiple traverse furrow.
Background technology
In the past, proposed there is the air-inflation tyre (for example, referring to following patent documentation 1) adopting and there is at fetus face the tread contour of multiple pattern block.In order to improve the friction force for ice road surface, the edge of the tread of described pattern block such as comprises toothed section.
Patent documentation 1: Japanese Unexamined Patent Publication 2012-218651 publication
But for the toothed section at the edge of described pattern block, the rigidity of the recess caved in the center of gravity side towards described pattern block is low.Therefore, the distortion of described pattern block near recess increases, and therefore there is the tendency being easy to produce partial wear.
Summary of the invention
The present invention completes in view of actual conditions so above, and its main purpose is to provide a kind of rideability that can further improve on ice road surface, and can improve the air-inflation tyre of resistance to partial wear performance.
The present invention relates to air-inflation tyre, this air-inflation tyre has at least one first pattern block marked off by multiple traverse furrow at fetus face, this is airtyred is characterised in that, at least one edge that described first pattern block comprises tread, pattern block wall and extends between this tread and this pattern block wall, at least one edge described comprises toothed section, and this toothed section comprises: the first edge tilted relative to tire axial; Be connected with the one end at described first edge and towards and the second edge of tilting of described first edge opposite sense; And to be connected with the other end at described first edge and towards and the 3rd edge that tilts of described first edge opposite sense, the other end at described first edge is positioned at the position leaning on the center of gravity side of described first pattern block than the one end at described first edge, and the pattern block wall extended from the described edge of described first pattern block towards tire radial direction inner side comprises: the first wall extended from described first edge towards tire radial direction inner side; The second wall extended from described second edge towards tire radial direction inner side; The 3rd wall extended from described 3rd edge towards tire radial direction inner side; And the 4th wall be configured between described first wall and described 3rd wall, described 4th wall is for by the first edge extended at described first wall, in the second edge that the bottom of trench of described traverse furrow extends and the roughly triangular shape that surrounds of the 3rd edge in described 3rd wall extension.
Described air-inflation tyre involved in the present invention, be preferably, the first intersection point of described first edge and described 3rd edges intersect, is positioned at the described other end at described first edge.
Described air-inflation tyre involved in the present invention, be preferably, the second intersection point of described first edge and described second edges intersect, is positioned at and extends the first longitudinal edge from the described one end at described first edge towards described bottom of trench.
Described air-inflation tyre involved in the present invention, is preferably, the 3rd intersection point of described second edge and described 3rd edges intersect, is positioned at the 3rd longitudinal edge extended towards described bottom of trench with the end of described first opposition side, edge from described 3rd edge.
Described air-inflation tyre involved in the present invention, is preferably, and at the described tread of described first pattern block, is formed from described second wall towards at least one the first cutter grooves extended with the direction of described second edge quadrature.
Described air-inflation tyre involved in the present invention, is preferably, and at the described tread of described first pattern block, is formed with multiple second cutter grooves that court extends with the direction of described second sides aligned parallel.
Described air-inflation tyre involved in the present invention, be preferably, described fetus face comprise be divided in most roller tire equator side tire crown land part, be divided in by the tire-shoulder land part outside tire axial and the middle land part that is divided between described tire crown land part and described tire-shoulder land part, described middle land part comprises the multiple middle pattern block marked off by multiple middle transverse groove, and described middle pattern block comprises the first pattern block described at least one.
Air-inflation tyre of the present invention is formed with recess in another side at the first edge of the first pattern block, but the 4th wall that this part is configured between the first wall of pattern block wall and the 3rd wall is strengthened, thus improves rigidity.Therefore, suppress the distortion of another side at the first edge at the first pattern block, thus suppress the partial wear at this place.
Air-inflation tyre of the present invention utilizes the 4th wall of the roughly triangular shape surrounded to the 3rd edge by the first edge balancedly to improve tire rigid circumference and tire axial rigidity near the other end at the first edge.Therefore, the edge of the first pattern block can reliably ground connection, improves the curving and braking ability on ice road surface in the lump, thus improve the ice snow covered pavement performance of tire.
Accompanying drawing explanation
Fig. 1 is the expansion drawing of the airtyred fetus face of an embodiment of the invention.
Fig. 2 is the partial enlarged drawing of first pattern block of Fig. 1.
Fig. 3 is the block diagram of the first pattern block.
Fig. 4 is a block diagram part for the pattern block wall of the first pattern block be exaggerated.
Fig. 5 (A) and Fig. 5 (B) is the block diagram of the pattern block wall of other embodiment.
Fig. 6 (A) and Fig. 6 (B) is the block diagram of the pattern block wall of other embodiment.
Description of reference numerals
1: air-inflation tyre; 2: fetus face; 4: traverse furrow; 5: pattern block; 12: the first pattern blocks; 13: pattern block wall; 14: edge; 15: the first edges; 16: the second edges; 17: the three edges; 19: the first walls; 21: the three walls; 22: the four walls; 22A: the first edge; 22B: the second edge; 22C: the three edge; C: tire equator.
Detailed description of the invention
Below, based on accompanying drawing, an embodiment of the invention are described.
Fig. 1 shows the expansion drawing of the fetus face 2 of the air-inflation tyre (following, to be sometimes only designated as " tire ") 1 of present embodiment.The tire 1 of present embodiment is such as expressed as the nonskid tire of car.But the present invention is also applicable to the tire of each generic categories such as heavy lift use certainly.
As shown in Figure 1, tire 1 such as there is non-symmetrical fetus face 2 and to vehicle installation direction be designated.Installation direction to vehicle such as represents with word etc. in the sidewall of tire 1 (omitting diagram).
The tire 1 of present embodiment is provided with many tap drains 3 such as extended continuously along tire circumference and many traverse furrows 4 extended from tap drain 3 at fetus face 2.
The tap drain 3 of present embodiment is preferably formed to the linearity or zig-zag that extend along tire circumference.When tap drain 3 is linearity, the rear of the moisture film in ditch towards tire rotation direction can be discharged swimmingly, thus excellent drainage performance can be played.On the other hand, under tap drain 3 is jagged situation, improve the marginal element of tire axial, improve the friction force when driving on ice road surface, braking, and increase ditch volume, snow road can play large snow post shearing force.
Tap drain 3 such as comprises: be configured in than the outside crown tap drain 3A of tire equator C by vehicle outside; Be configured in than tire equator C more by the inner tyre crown tap drain 3B of vehicle interior side; Be configured in than the external shoulder tap drain 3C of outside crown tap drain 3A by vehicle outside; And be configured in than the inner side shoulder main groove 3D of inner tyre crown tap drain 3B by vehicle interior side.Wherein, position when above-mentioned " vehicle interior side " and " vehicle outside " represent that tire 1 is installed in vehicle.
Inner tyre crown tap drain 3B preference is as being zig-zag.In order to improve turning performance, tire 1 exist such as relative to vehicle with Ha shape, namely carry out the tendency of installing with negative camber angle.Therefore, the ground pressure of the vehicle interior side of tire 1 is larger than the ground pressure of vehicle outside.From such a viewpoint, jagged inner tyre crown tap drain 3B further can play friction force when driving, braking effectively on ice road surface, further can improve the ice snow covered pavement performance of tire 1.
The traverse furrow 4 of present embodiment preferably extends to linearity or zig-zag.When traverse furrow 4 is linearity, the rigidity contributing to the tire circumference maintaining pattern block 5 is large.On the other hand, under traverse furrow 4 is jagged situation, its ditch volume increases, and the snow post shearing force on snow road becomes large, contributes to improving ice snow covered pavement performance.
The furrow bank that traverse furrow 4 such as also can be formed as a side side is linearity and the furrow bank of the opposing party side is zig-zag.The furrow bank of the linearity of one side makes the flowing of draining smooth and easy and improves drainage performance, and contributes to the rigidity improving pattern block 5.Further, the jagged furrow bank of described the opposing party side increases the marginal element of tire axial and improves ice road performance, and improves snow post shearing force, thus contributes to improving ice snow covered pavement performance.
Traverse furrow 4 such as comprises: extend to many crown traverse furrow 4A will coupled together between outside crown tap drain 3A and inner tyre crown tap drain 3B; Extend to many outside middle transverse groove 4B will coupled together between outside crown tap drain 3A and external shoulder tap drain 3C; Extend to many inner side middle transverse groove 4C will coupled together between inner tyre crown tap drain 3B and inner side shoulder main groove 3D; Extend to many external shoulder traverse furrow 4D will coupled together between external shoulder tap drain 3C and tyre surface end Te; And extend to many inner side tire-shoulder transverse groove 4E will coupled together between inner side shoulder main groove 3D and tyre surface end Te.
The inner side middle transverse groove 4C of present embodiment such as extends to zig-zag from tire equator C side towards tyre surface ground terminal Te side.It is maximum that inner side middle transverse groove 4C is such as formed as ditch width in traverse furrow 4.Such inner side middle transverse groove 4C also can play large snow post shearing force when turning, thus further improves ice snow covered pavement performance.
Multiple pattern block 5 is marked off by these tap drains 3 and traverse furrow 4 at fetus face 2.The pattern block 5 of present embodiment comprises crown pattern block 7, outside middle pattern block 8, inner side middle pattern block 9, external shoulder pattern block 10 and inner side pattern block on tire shoulder 11.
Crown pattern block 7 tire crown land part by outside crown tap drain 3A, inner tyre crown tap drain 3B and crown traverse furrow 4A divide.Outside middle pattern block 8 by outside crown tap drain 3A, external shoulder tap drain 3C and outside middle transverse groove 4B divide.Inner side middle pattern block 9 by inner tyre crown tap drain 3B, inner side shoulder main groove 3D and inner side middle transverse groove 4C divide.External shoulder pattern block 10 divide by the tyre surface end Te in external shoulder tap drain 3C, outside and external shoulder traverse furrow 4D.Inner side pattern block on tire shoulder 11 divide by the tyre surface end Te of inner side shoulder main groove 3D, inner side and inner side tire-shoulder transverse groove 4E.
There is large ground pressure in inner side middle pattern block 9 due to effect, therefore there is the tendency being easy to especially produce partial wear.From such a viewpoint, in the present embodiment, inside at least one, middle pattern block 9 is formed as the first pattern block 12 involved in the present invention.In the present embodiment, all inner side middle pattern block 9 are formed with the first pattern block 12.
Fig. 2 shows middle pattern block 9 inside the first pattern block 12(by Fig. 1) near the partial enlarged drawing that is exaggerated.Fig. 3 shows middle pattern block 9 inside the first pattern block 12() block diagram.As shown in FIG. 2 and 3, the first pattern block 12 edge 14 of comprising tread 12S, pattern block wall 13 and extending between which.
The recess corresponding with the zig-zag of inner side middle transverse groove 4C is formed at edge 14.Edge 14 comprises toothed section 18, and this toothed section 18 comprises: the first edge 15 tilted relative to tire axial; Be connected with one end 15A at the first edge 15 and towards and the second edge 16 of tilting of the first edge 15 opposite sense; Be connected with the other end 15B at the first edge 15 and towards and the 3rd edge 17 that tilts of the first edge 15 opposite sense.The other end 15B at the first edge 15 is positioned at the position more leaning on center of gravity (not shown) side of the first pattern block 12 than one end 15A at the first edge 15.
As shown in Figure 3, the pattern block wall 13 extended from the toothed section 18 at the edge 14 of the first pattern block 12 towards tire radial direction inner side comprises: the first wall 19 extended from the first edge 15 towards tire radial direction inner side; The second wall 20 extended from the second edge 16 towards tire radial direction inner side; The 3rd wall 21 extended from the 3rd edge 17 towards tire radial direction inner side; And the 4th wall 22 be configured between the first wall 19 and the 3rd wall 21.
Fig. 4 shows the block diagram be exaggerated by pattern block wall 13.As shown in Figure 3 or Figure 4, the 4th wall 22 is formed as by the first edge 22A extended at the first wall 19, the second edge 22B extended at the bottom of trench 23 of inner side middle transverse groove 4C and the roughly triangular shape surrounded at the 3rd edge 22C that the 3rd wall 21 extends.That is, the 4th wall 22 increases the rubber volume of the part of the recess as pattern block wall 13.
For the tire 1 of present embodiment, be formed with recess in the other end 15B side at the first edge 15 of the first pattern block 12, but the 4th wall 22 that this recess is configured between the first wall 19 and the 3rd wall 21 is strengthened, and improves rigidity thus.Therefore, suppress the partial wear of the other end 15B side at the first edge 15 at the first pattern block 12, improve the resistance to partial wear performance of tire 1.
For the tire 1 of present embodiment, utilize the 4th wall 22 of the roughly triangular shape surrounded to the 3rd edge 22C by the first edge 22A, near the other end 15B at the first edge 15, balancedly improve tire rigid circumference and tire axial rigidity.Therefore, the edge 14 of the first pattern block 12 can reliably ground connection, improves the curving and braking ability on ice snow covered pavement, thus improve the ice snow covered pavement performance of tire 1.
4th wall 22 such as comprises: the first intersection point P1 that the first edge 22A is crossing with the 3rd edge 22C; The second intersection point P2 that first edge 22A is crossing with the second edge 22B; And the second edge 22B three intersection point P3 crossing with the 3rd edge 22C.
4th wall 22, its area is larger, more further can effectively play above-mentioned effect.From such a viewpoint, the first intersection point P1 preference is as being positioned at the other end 15B at the first edge 15.From the same viewpoint, the first longitudinal edge the 24, three intersection point P3 preference that second intersection point P2 preference extends from one end 15A at the first edge 15 towards bottom of trench 23 as being positioned at is as being positioned at the 3rd longitudinal edge 25 extended towards bottom of trench 23 with the end of the first opposition side, edge 15 from the 3rd edge 17.
As other embodiment of the present invention, external shoulder pattern block 10 or inner side pattern block on tire shoulder 11, such as, also can be formed as comprising at least one first pattern block 12.The furrow bank of an external shoulder traverse furrow 4D and inner side tire-shoulder transverse groove 4E such as side side extends to linearity, and the furrow bank of the opposing party side extends to zig-zag.Therefore, recess is formed with at the edge of a side side of outside pattern block on tire shoulder 10 or inner side pattern block on tire shoulder 11.In order to strengthen this recess, also the 4th wall 22 can be formed at the furrow bank of a side side of outside pattern block on tire shoulder 10 or inner side pattern block on tire shoulder 11.Thus, suppress partial wear and further improve the curving and braking ability on ice snow covered pavement.
As shown in Figure 1 to Figure 3, multiple cutter groove S is such as provided with at the pattern block 5 of present embodiment.Each cutter groove S contributes to the ice snow covered pavement performance improving tire 1 by edge effect.
Cutter groove S such as comprises the first cutter groove S1 and the second cutter groove S2.Second cutter groove S2 is roughly parallel to inner side middle transverse groove 4C extension and at least one end is communicated with tap drain 3.The second cutter groove S2 like this adjusts the rigidity of the first pattern block 12, contributes to preventing partial wear.
As shown in Figure 2 or Figure 3, the first cutter groove S1 such as extends from the second wall 20 towards the direction orthogonal with the second edge 16 at the tread 12S of the first pattern block 12.First cutter groove S1 contributes to the rigidity near the second edge 16 of adjustment first pattern block 12.First cutter groove S1 can reduce the poor rigidity near the edge 14 of the first pattern block 12, can suppress the partial wear of the first pattern block 12 and further improve the curving and braking ability on ice snow covered pavement.
The degree of depth of the first cutter groove S1 is such as preferably less than 50% of the trench depth of inner side middle transverse groove 4C.When the degree of depth of the first cutter groove S1 is greater than 50% of the trench depth of inner side middle transverse groove 4C, the rigidity near the second edge 16 of the first pattern block 12 likely can be made excessively to reduce.From such a viewpoint, the degree of depth of the first cutter groove S1 is more preferably 2.5 ~ 3.5mm.
From the view point of identical with the degree of depth of the first cutter groove S1, the length in the rectangular direction of the first cutter groove S1 is such as preferably placed at center of gravity relative to the first pattern block 12 and the position more more outward than the imaginary line 17S making the 3rd edge 17 extend on the tread 12S of the first pattern block 12.The length in the rectangular direction of the first cutter groove S1 is more preferably 0.5 ~ 1.5mm.
Preferably at the pattern block 5 of present embodiment, arrange and the bight of each tread is cut sideling and the chamfered section M of the roughly triangular shape formed.At the first pattern block 12, such as at inner tyre crown tap drain 3B and inner side middle transverse groove 4C to report to the leadship after accomplishing a task and the summit becoming acute angle is provided with chamfered section M1.This chamfered section M1 contributes to the pattern block shortcoming or the partial wear that suppress the described summit starting from the first pattern block 12.
Fig. 5 (A) shows other the block diagram of pattern block wall 13 of embodiment of the present invention.
For the pattern block wall 13 of this embodiment, the inner side of tire radial direction of the other end 15B of the first intersection point P1 such as at the first edge 15 of the 4th wall 22 and the longitudinal edge 25 between the first wall 19 and the 3rd wall 21.Such pattern block wall 13 plays the stiffening effect to recess, compared with the pattern block wall 13 of above-mentioned embodiment, can increase the ditch volume of inner side middle transverse groove 4C, thus can play large snow post shearing force.
Fig. 5 (B) shows other the block diagram of pattern block wall 13 of embodiment of the present invention.
For the pattern block wall 13 of this embodiment, the 3rd intersection point P3 of the 4th wall 22 is such as leaning on the position inside pattern block center of gravity along the base 26 between the 3rd wall 21 and bottom of trench 23.Such pattern block wall 13 makes the rigidity of the outer side on the base 26 of the first pattern block 12 reduce, thus such as can suppress the be full of cracks of the outer side generation on base 26.
Fig. 6 (A) shows other the block diagram of pattern block wall 13 of embodiment of the present invention.
For the pattern block wall 13 of this embodiment, the second intersection point P2 of the 4th wall 22 is such as leaning on the position inside pattern block center of gravity along the base 27 between the first wall 19 and bottom of trench 23.Such pattern block wall 13 makes the rigidity of the outer side on the base 27 of the first pattern block 12 reduce, thus such as can suppress the be full of cracks of the outer side generation on base 27.
Fig. 6 (B) shows other the block diagram of pattern block wall 13 of embodiment of the present invention.
For the pattern block wall 13 of this embodiment, the first intersection point P1 of the 4th wall 22 is such as positioned at longitudinal edge 25, and the second intersection point P2 is such as positioned at base the 27, three intersection point P3 and is such as positioned at base 26.Such pattern block wall 13 plays the stiffening effect to recess, and the rigidity of the outer side of the first pattern block 12 is regulated, thus suppress the generation of be full of cracks, and the ditch volume of inner side middle transverse groove 4C can be increased, thus large snow post shearing force can be played.
Above, describe in detail, but the present invention is not limited to these embodiments to particularly preferred embodiment of the present invention, it can be deformed into various mode and be implemented.
Embodiment
Specification based on table 1 has manufactured experimently the test tire (size: 195/65R15) with the motif shown in Fig. 1, and tests these performances.
Each test method is as follows.
< control stability >
Each examination is installed on wheel rim (15 × 6.0J), interior pressure (210kPa) the full wheel that free air capacity is the back-wheel drive car of 2000cc for tire, is driven to travel on the test route on snow road by a chaufeur.The bearing circle responsibility evaluated based on the sense organ by chaufeur, rigidity sense, grab etc. relevant characteristic, the control stability on Lai Duixue road is evaluated.Result is the exponential representation of 100 with comparative example.Numerical value is the bigger the better.
< deceleration and stopping performance >
Each examination is installed on wheel rim (15 × 6.0J), interior pressure (210kPa) the full wheel that free air capacity is the back-wheel drive car of 2000cc for tire, is driven to travel on ice road surface by a chaufeur.Make described testing vehicle with the speeds of 30km/h, in this traveling, implement emergency braking, to until stop distance measure.For result, based on measured distance inverse and be the exponential representation of 100 with comparative example.Numerical value is the bigger the better.
The resistance to partial wear performance > of <
In the test route being configured with the wearing and tearing energy measurement mechanism be made up of the ground plane internal stress measuring sensor can measured three axial stress and slippage survey sensor that are configured with multiple strain gage, by a driver, each examination is travelled for the front wheel drive car that the free air capacity of pressing (210kPa) to be installed on full wheel within tire is 2000cc.Based on the measured ground pressure when the braking of braking force described testing vehicle being loaded with to 0.2G and slippage, the wearing and tearing energy Ea calculating the side that first lands of the first pattern block with after to land the ratio (Ea/Eb) of wearing and tearing energy Eb of side.For result, based on calculated ratio inverse and be the exponential representation of 100 with comparative example.Numerical value is the bigger the better.In addition, generally speaking, described wearing and tearing can be able to calculate based on the product of ground pressure P and slippage X (PX), enter wearing and tearing energy measurement mechanism until value out carries out integration to try to achieve to surface of tyre.
Table 1
As shown in table 1, can confirm that the tire of embodiment improves as the control stability on the snow road of ice snow covered pavement performance and the deceleration and stopping performance on ice road surface and resistance to partial wear performance.

Claims (7)

1. an air-inflation tyre, it has at least one first pattern block marked off by multiple traverse furrow at fetus face, this is airtyred is characterised in that,
At least one edge that described first pattern block comprises tread, pattern block wall and extends between this tread and this pattern block wall,
At least one edge described comprises toothed section, and this toothed section comprises: the first edge tilted relative to tire axial; Be connected with the one end at described first edge and towards and the second edge of tilting of described first edge opposite sense; And to be connected with the other end at described first edge and towards and the 3rd edge that tilts of described first edge opposite sense,
The other end at described first edge is positioned at the position leaning on the center of gravity side of described first pattern block than the one end at described first edge,
The pattern block wall extended from the described edge of described first pattern block towards tire radial direction inner side comprises: the first wall extended from described first edge towards tire radial direction inner side; The second wall extended from described second edge towards tire radial direction inner side; The 3rd wall extended from described 3rd edge towards tire radial direction inner side; And the 4th wall be configured between described first wall and described 3rd wall,
Described 4th wall is for by the first edge extended at described first wall, in the second edge that the bottom of trench of described traverse furrow extends and the roughly triangular shape that surrounds of the 3rd edge in described 3rd wall extension.
2. air-inflation tyre according to claim 1, is characterized in that,
First intersection point of described first edge and described 3rd edges intersect, is positioned at the described other end at described first edge.
3. air-inflation tyre according to claim 1 and 2, is characterized in that,
Second intersection point of described first edge and described second edges intersect, is positioned at and extends the first longitudinal edge from the described one end at described first edge towards described bottom of trench.
4. the air-inflation tyre according to any one in claims 1 to 3, is characterized in that,
3rd intersection point of described second edge and described 3rd edges intersect, is positioned at the 3rd longitudinal edge extended towards described bottom of trench with the end of described first opposition side, edge from described 3rd edge.
5. the air-inflation tyre according to any one in Claims 1 to 4, is characterized in that,
At the described tread of described first pattern block, be formed from described second wall towards at least one the first cutter grooves extended with the direction of described second edge quadrature.
6. the air-inflation tyre according to any one in Claims 1 to 5, is characterized in that,
At the described tread of described first pattern block, be formed with multiple second cutter grooves that court extends with the direction of described second sides aligned parallel.
7. the air-inflation tyre according to any one in claim 1 ~ 6, is characterized in that,
Described fetus face comprise be divided in most roller tire equator side tire crown land part, be divided in by the tire-shoulder land part outside tire axial and the middle land part that is divided between described tire crown land part and described tire-shoulder land part,
Described middle land part comprises the multiple middle pattern block marked off by multiple middle transverse groove,
Described middle pattern block comprises the first pattern block described at least one.
CN201410142757.4A 2013-07-12 2014-04-10 Pneumatic tire Expired - Fee Related CN104275987B (en)

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CN109910512B (en) * 2017-12-13 2020-12-18 东洋橡胶工业株式会社 Pneumatic tire
US11179974B2 (en) 2017-12-13 2021-11-23 Toyo Tire Corporation Pneumatic tire
DE102018221502B4 (en) 2017-12-13 2022-09-29 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
CN111532087A (en) * 2019-02-06 2020-08-14 住友橡胶工业株式会社 Tyre for vehicle wheels

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