CN102756619B - Air-inflation tyre - Google Patents
Air-inflation tyre Download PDFInfo
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- CN102756619B CN102756619B CN201210112705.3A CN201210112705A CN102756619B CN 102756619 B CN102756619 B CN 102756619B CN 201210112705 A CN201210112705 A CN 201210112705A CN 102756619 B CN102756619 B CN 102756619B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0355—Circumferential grooves characterised by depth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Air-inflation tyre of the present invention, can suppress the reduction of control stability and anti-irregular wear performance and improve wet road performance.Under the state loading normal loading, the ground plane of fetus face (2) is set to, and the ground contact length of the tire circumference in tire equator (C) is 1.05 ~ 1.15 times of the ground contact length of tire shoulder position.Land portion width (Wc) of the tire axial in central land portion (5) is more than 0.8 times of land portion width (Ws) of the tire axial in tire-shoulder land portion (6) and is less than 1.0 times.Central land portion is provided with: central counter drain (7), and it more to extend continuously along tire circumference by the region of the inner side of tire axial at the midway location than land portion width (Wc) and has the trench depth less than the average trench depth of central main groove (3) and shoulder main groove (4); Central transverse (8), it connects central main groove (3) and shoulder main groove (4) and have the trench depth less than average trench depth.Tire-shoulder land portion (6) is along the continuous and unbroken strip decorative pattern of tire circumference.
Description
Technical field
The present invention relates to the decline and the air-inflation tyre of raising wet road performance that suppress control stability and anti-irregular wear performance, particularly relate to the air-inflation tyre being suitable as light truck.
Background technology
The known air-inflation tyre being formed with the block-type tread of multiple pattern block at fetus face.In recent years, for this air-inflation tyre, require the further raising of wet road performance.In order to improve wet road performance, to discharge swimmingly for the purpose of the moisture film between fetus face and road surface, propose the scheme etc. such as increasing and be arranged at the tap drain of fetus face, the ditch width of traverse furrow.
But, in the methods described above, because ground contact area reduces, so decorative pattern rigidity declines, therefore there is the problem of control stability, anti-irregular wear penalty.
Patent documentation 1:JP JP 2002-46427 publication
Summary of the invention
The present invention proposes in view of above problem, its main purpose is, there is provided a kind of equipping position of each tap drain, counter drain and the trench depth of traverse furrow, the land portion width in each land portion and shape of ground plane extended along tire circumference with regulation be basic, suppress the air-inflation tyre of the decline of control stability and anti-irregular wear performance road performance and raising is wet.
Invention in the present invention described in technical scheme 1 is a kind of air-inflation tyre, by in tire equator along the central main groove that extends continuously of tire circumference, with outside the tire axial two of this central main groove along a pair shoulder main groove extending continuously of tire circumference, and a pair central land portion extended between above-mentioned shoulder main groove and above-mentioned central main groove is marked off at fetus face, and a pair tire-shoulder land portion extended between above-mentioned shoulder main groove and tyre surface ground terminal, this is airtyred is characterised in that, be assembled in regular wheel rim at wheel rim and fill in standard and press, and load normal loading and with under the state of the camber angle ground connection of the 0 degree loading normal loading that is plane, the ground plane of fetus face is configured to: the ground contact length of the tire circumference in tire equator be and tire equator interval tyre surface ground connection width 40% 1.05 ~ 1.15 times of ground contact length of tire circumference of tire shoulder position of distance, above-mentioned central land portion is configured to: the land portion width of the tire axial in this central land portion is more than 0.8 times of the land portion width of the tire axial in above-mentioned tire-shoulder land portion and is less than 1.0 times, and be provided with in above-mentioned central land portion: central counter drain, it more extends along tire circumference by the region of the inner side of tire axial continuously at the midway location than above-mentioned land portion width, and there is the trench depth of 0.2 ~ 0.5 times of the average trench depth of the trench depth of above-mentioned central main groove and the trench depth of above-mentioned shoulder main groove, central transverse, it connects above-mentioned central main groove and above-mentioned shoulder main groove and has the trench depth of 0.2 ~ 0.5 times of above-mentioned average trench depth, and above-mentioned tire-shoulder land portion is along the continuous and unbroken strip decorative pattern of tire circumference.
In addition, invention described in technical scheme 2, on the airtyred basis described in technical scheme 1, the formation in above-mentioned central land portion comprises: more more lean on the outside pattern block outside tire axial by the side pattern block inside tire axial with than above-mentioned central counter drain than above-mentioned central counter drain, the pattern block width of the tire axial of above-mentioned side pattern block is 0.6 ~ 0.9 times of the pattern block width of above-mentioned outside pattern block.
In addition, invention described in technical scheme 3, on the airtyred basis described in technical scheme 2, above-mentioned side pattern block is provided with the inner side sipes per tire of the semi-open type extended outside tire axial from above-mentioned central main groove, above-mentioned outside pattern block is provided with the outside sipes per tire of the semi-open type extended inside tire axial from above-mentioned shoulder main groove, and the total number of above-mentioned inner side sipes per tire is less than the total number of above-mentioned outside sipes per tire.
In addition, invention described in technical scheme 4, on the airtyred basis described in technical scheme 3, above-mentioned side pattern block due to above-mentioned central transverse be 45 ~ 75 degree relative to the angle of tire circumference, form almost parallel quadrangle form thus, above-mentioned outside pattern block is divided into multiple outsides pattern block small pieces by above-mentioned outside sipes per tire, and above-mentioned outside pattern block small pieces comprise: small pieces outside first, and it comprises the bight in acute angle outside the tire axial of above-mentioned outside pattern block; Small pieces outside second, it comprises the bight in obtuse angle outside the tire axial of above-mentioned outside pattern block, and outside above-mentioned second, the minimum length La of the tire circumference of small pieces is less than the minimum length Lb of the tire circumference of small pieces outside above-mentioned first.
In addition, invention described in technical scheme 5, on the airtyred basis described in technical scheme 3 or 4, above-mentioned side pattern block is divided into multiple side pattern block small pieces by above-mentioned inner side sipes per tire, above-mentioned side pattern block small pieces comprise: small pieces inside first, and it comprises the bight in acute angle inside the tire axial of above-mentioned side pattern block; Small pieces inside second, it comprises the bight in obtuse angle inside the tire axial of above-mentioned side pattern block, and inside above-mentioned second, the minimum width Wa of the tire axial of small pieces is less than the minimum width Wb of the tire axial of small pieces inside above-mentioned first.
Air-inflation tyre of the present invention fetus face by tire equator along the tire central main groove that extends continuously of circumference and outside the tire axial two of this central main groove along a pair shoulder main groove that tire circumference extends continuously, and mark off a pair central land portion extended between above-mentioned shoulder main groove and above-mentioned central main groove and a pair tire-shoulder land portion extended between above-mentioned shoulder main groove and tyre surface ground terminal.
In addition, be assembled in regular wheel rim at wheel rim and fill in standard pressure and load normal loading and under the state of the loading normal loading being plane with the camber angle ground connection of 0 degree, the ground plane of fetus face is configured to, and the ground contact length of the tire circumference in tire equator is 1.05 ~ 1.15 times of the ground contact length of the tire circumference of the tire shoulder position of the distance of 40% of interval tyre surface ground connection width from tire equator.This air-inflation tyre can reduce the difference of the difference of the earth contact pressure of the tire axial both sides in central land portion and the earth contact pressure in central land portion and tire-shoulder land portion.Therefore air-inflation tyre of the present invention can suppress the irregular wears such as the tire shoulder defect wearing and tearing easily produced in tire-shoulder land portion, and then improves anti-irregular wear performance.
In addition, the land portion width of the tire axial in central land portion is set to more than 0.8 times of the land portion width of the tire axial in tire-shoulder land portion and is less than 1.0 times.Thus, during turning driving, the rigidity that effect has the tire-shoulder land portion of larger transverse force can be improved, thus control stability and anti-irregular wear performance can be improved.
In addition, be provided with in above-mentioned central land portion: central counter drain, its midway location at the land portion width than above-mentioned central land portion more extends along tire circumference continuously by the region of the inner side of tire axial, and has the trench depth of 0.2 ~ 0.5 times of the average trench depth of the trench depth of above-mentioned central main groove and the trench depth of above-mentioned shoulder main groove; Central transverse, it connects above-mentioned central main groove and above-mentioned shoulder main groove, and has the trench depth of 0.2 ~ 0.5 times of above-mentioned average trench depth.This central counter drain can discharge the moisture film between central land portion and road surface more reliably.In addition, central transverse contributes to the water capacity in central main groove, central counter drain to change places to shoulder main groove side to discharge.Further, the trench depth of central counter drain and central transverse is defined as the less degree of depth of 0.2 ~ 0.5 times of above-mentioned average depth.Therefore air-inflation tyre of the present invention can prevent the rigidity in central land portion from declining, thus guarantees control stability and anti-irregular wear performance at a high level, and improves wet road performance further.
In addition, tire-shoulder land portion is along the continuous and unbroken strip decorative pattern of tire circumference.Thus, improve the rigidity in tire-shoulder land portion further, and the large change of the earth contact pressure near tyre surface ground terminal can be resisted, thus control stability and anti-irregular wear performance are guaranteed in higher level ground.
Accompanying drawing explanation
Fig. 1 is the expansion drawing of the airtyred fetus face representing an embodiment of the invention.
Fig. 2 (a) is for representing that the air-inflation tyre of present embodiment is grounded on the birds-eye view of the ground plane on road surface, and (b) is the cutaway view parallel with the tire equator face of the state representing (a).
Fig. 3 is the partial enlarged drawing of Fig. 1.
Description of reference numerals: 2... fetus face; 3... central main groove; 4... shoulder main groove; 5... central land portion; 6... tire-shoulder land portion; 7... central counter drain; 8... central transverse; C... tire equator; Wc... the land portion width in central land portion; Ws... the land portion width in tire-shoulder land portion; Te... tyre surface ground terminal.
Detailed description of the invention
As shown in Figure 1, the air-inflation tyre of present embodiment is (following, sometimes referred to as " tire "), such as be suitable as light truck tire to utilize, its fetus face 2 be provided with on tire equator C along a tire central main groove 3 extending continuously of circumference and in the tire axial both sides of this central main groove 3 along a pair shoulder main groove 4 that tire circumference extends continuously.Thus, mark off at fetus face 2: a pair central land portion 5 extended between central main groove 3 and shoulder main groove 4, a pair tire-shoulder land portion 6 extended between shoulder main groove 4 and tyre surface ground terminal Te.Thus the tire of present embodiment has four land portion altogether at fetus face 2.
At this, above-mentioned " tyre surface ground terminal " Te is defined as, regular wheel rim being assembled in wheel rim and tire 1 under filling the non-loaded normal state of pressing in standard, loading normal loading and with the camber angle ground connection of 0 degree for leaning on most the earthing position outside tire axial during plane.In addition, the distance of the tire axial between this tyre surface ground terminal Te, Te is defined as tyre surface ground connection width TW.In addition, the size etc. in each portion of tire is the value under normal state when being not particularly limited.
In addition, above-mentioned " regular wheel rim " refers in the schematism of the specification comprising tire institute foundation, the wheel rim of this specification is specified according to each tire, such as if JATMA is then " standard rim ", if TRA is then " DesignRim ", if ETRTO is then " MeasuringRim ".
In addition, above-mentioned " in standard pressure " refers in the schematism of the specification comprising tire institute foundation, the air pressure of each specification is specified according to each tire, if JATMA is then " the highest air pressure ", if the maxim of TRA then described in table " TIRELOADLIMITSATVARIOUSCOLDINFLATIONPRESSURES ", if ETRTO is then " INFLATIONPRESSURE ", but when tire be car use get 180kPa.
And, " normal loading " refers in the schematism of specification comprising tire institute foundation, the load of each specification is specified according to each tire, if JATMA is then " maximum load capability ", if the maxim of TRA then described in table " TIRELOADLIMITSATVARIOUSCOLDINFLATIONPRESSURES ", if ETRTO is then " LOADCAPACITY ", but when tire be car use get be equivalent to above-mentioned load 88% load.
In the present embodiment, above-mentioned central main groove 3 is alternately formed by spreading all over tire circumference: the straight part 3A that the ditch width of this central main groove 3 the is certain and ditch width bellying 3B larger than the ditch width of this straight part 3A.The movement that when this central main groove 3 utilizes straight part 3A to suppress braking, the rocking of vehicle, sideslip etc. are unstable, and the draining in straight part 3A can be discharged swimmingly.In addition, the moisture film on road surface effectively can be collected at bellying 3B.Therefore, central main groove 3 can improve control stability, wet road performance.
In addition, above-mentioned shoulder main groove 4 is the linearities along tire circumference, is formed in the present embodiment with certain width.In addition, the width of the shoulder main groove 4 of present embodiment is formed as wider than central main groove 3.This shoulder main groove 4 contributes to improving control stability, wet road performance.
In addition, for central main groove 3 and shoulder main groove 4 ditch width (the ditch width at a right angle with the length direction of ditch, below, for other ditch too.) W1, W2 and trench depth (not shown), can be set as of all kinds by convention.But, if above-mentioned ditch width W1, W2 and/or trench depth excessive, then each land portion 5,6 rigidity decline, thus there is the tendency of control stability, anti-irregular wear penalty, on the contrary, if too small, then exist drainage worsen tendency.Therefore ditch width W1, W2 are such as preferably 2.5 ~ 8.0% of tread width TW, and in addition, trench depth is preferably 8.0 ~ 15.0mm.
In addition, for the equipping position of shoulder main groove 4, such as, tire axial distance L1 between its line of centers G2 and above-mentioned tire equator C, be preferably more than 13% of tyre surface ground connection width TW, be more preferably more than 20%, be preferably less than 26% in addition, be more preferably less than 25%.By shoulder main groove 4 is set in such scope, each rigid balancing in central land portion 5 and tire-shoulder land portion 6 is improved, improve control stability.
If the cross section near Fig. 2 (a) and tire equator C thereof is namely shown in (b), the ground plane Se of the fetus face 2 under the state loading above-mentioned normal loading is (in this figure, the region surrounded by ground connection edge Y-Y) be set to, the ground contact length Lc of the tire circumference on tire equator C is 1.05 ~ 1.15 times of the ground contact length Ls of the tire circumference at the Sh place, tire shoulder position of the distance of 40% of interval tyre surface ground connection width TW from tire equator C.That is, in the present invention, ground plane Se is set as that the ratio of Lc/Ls is less than the ratio of the Lc/Ls of the ground plane of existing tire, thus close to substantially rectangular shape.This tire, difference and the central land portion 5 of the earth contact pressure of the tire axial both sides in central land portion 5 reduce with the difference of the earth contact pressure in tire-shoulder land portion 6, thus the tire shoulder defect easily produced in tire-shoulder land portion 6 can be suppressed to wear and tear, and then improve anti-irregular wear performance.In addition, in the present embodiment, owing to being provided with central main groove 3 on tire equator C, thus above-mentioned ground contact length Lc with the virtual ground edge Y1 connecting the ground connection edge Y of tire axial both sides smoothly for benchmark sets.
At this, if the above-mentioned ground contact length Lc on tire equator C is less than 1.05 with the ratio Lc/Ls of the above-mentioned ground contact length Ls at Sh place, tire shoulder position, the earth contact pressure in the tire-shoulder land portion 6 during traveling of then keeping straight on increases, craspedodrome stability worsens, in addition, the wearing and tearing in tire-shoulder land portion 6 can increase, and thus easily shoulder wear occur.On the contrary, be greater than 1.15 if above-mentioned than Lc/Ls, then the earth contact pressure in tire-shoulder land portion 6 becomes too small compared with central land portion 5, and tire-shoulder land portion 6 produces skids, the wearing and tearing of same easily generation tire shoulder defect.Based on this viewpoint, be above-mentionedly preferably more than 1.07 than Lc/Ls, and be more preferably less than 1.13.
In addition, as shown in Figure 1, central land portion 5 is set to, and the land portion width W c of the tire axial in this central land portion 5 is more than 0.8 times of the land portion width Ws of the tire axial in above-mentioned tire-shoulder land portion 6 and is less than 1.0 times.This central land portion 5 and tire-shoulder land portion 6 balancedly guarantee the rigidity in each land portion 5,6, improve control stability, anti-irregular wear performance.Wherein, when land portion width W c, the Ws in each land portion 5,6 are not one fixed widthes, its maximum width is defined as each land portion width.
In addition, central land portion 5 is provided with: central counter drain 7, and its midway location at the above-mentioned land portion width W c than this central land portion 5 more extends along tire circumference continuously by the region of the inner side of tire axial; Central transverse 8, it connects above-mentioned central main groove 3 and above-mentioned shoulder main groove 4.Thus, central land portion 5 is divided into: side pattern block row 10R, and it is by than central counter drain 7 more by the side pattern block 10 that marks off inside tire axial along tire circumferential array; Outside pattern block row 11R, it is by than central counter drain 7 more by the outside pattern block 11 that marks off outside tire axial along tire circumferential array.
The central counter drain 7 of present embodiment extends into linearity along tire circumference.This central counter drain 7 can discharge the moisture film on central land portion 5 and road surface effectively.
Above-mentioned central transverse 8 extends obliquely relative to tire axial.In a pair central land portion 5,5, the inclination of central transverse 8 can be equidirectional, also can be opposite sense.In the present embodiment, each central land portion 5 is provided with the central transverse 8 to inclined (in this example, towards upper right side).This central transverse 8 can have nothing to do with the hand of rotation of tire and utilize centnifugal force during turning to be discharged to shoulder main groove 4 swimmingly by the water in central main groove 3.
Central transverse 8 is preferably more than 45 degree relative to the angle θ 1 of tire circumference, is more preferably more than 50 degree, is preferably less than 75 degree in addition, is more preferably less than 65 degree.If above-mentioned angle θ 1 increases, then drainage when likely making craspedodrome travel worsens, and on the contrary, if above-mentioned angle θ 1 reduces, then likely makes the rigidity in central land portion 5 decline.Wherein, in the present invention, owing to making the earth contact pressure in central land portion 5 even, so the above-mentioned angle θ 1 of central transverse 8 can be reduced.
In addition, as shown in amplify in Fig. 3, the central transverse 8 of present embodiment comprises: be formed at the middle body of this central transverse 8 and the wide portion 12 of ditch constant width; Connect this wide portion 12 with central main groove 3 and the first widening portion 13 of increasing in central main groove 3 side of ditch width; And connect above-mentioned wide portion 12 with shoulder main groove 4 and the second widening portion 14 of increasing in shoulder main groove 4 side of ditch width.This central transverse 8 makes the draining between central main groove 3 and shoulder main groove 4 more smooth and easy, contributes to improving wet road performance.
In order to effectively play this effect, the ditch width W4a of the first widening portion 13 is preferably more than 1.1 with the ditch width of the ditch width W4 in wide portion 12 than W4a/W4, is more preferably more than 1.3.Similarly, the ditch width W4b of the second widening portion 14 is preferably more than 1.5 with the ditch width of the ditch width W4 in wide portion 12 than W4b/W4, is more preferably more than 2.0.On the other hand, if above-mentioned ditch width increases than W4a/W4 and W4b/W4, then the rigidity of side pattern block 10 and/or outside pattern block 11 is likely made to decline.Based on this viewpoint, above-mentioned ditch width is preferably less than 2.1 than W4a/W4, is more preferably less than 1.9.In addition, above-mentioned ditch width is preferably less than 4.5 than W4b/W4, is more preferably less than 4.0.In addition, in order to the draining swimmingly of tyre surface ground terminal Te side, the ditch width W4b of the second widening portion 14 is preferably greater than the ditch width W4a of the first widening portion 13.
In addition, the central authorities trench depth D3 (not shown) of the counter drain 7 and trench depth D4 (not shown) of central transverse 8, is all set to 0.2 ~ 0.5 times of the average trench depth DA (not shown) of the trench depth of central main groove 3 and the trench depth of shoulder main groove 4.This central counter drain 7 and central transverse 8 can prevent the rigidity in central land portion 5 from declining, and discharge the moisture film between central land portion 5 and road surface swimmingly.Wherein, if the trench depth D3 of central the counter drain 7 and trench depth D4 of central transverse 8 is less than 0.2 times of average trench depth DA, then cannot expect the raising of wet road performance, on the contrary, if above-mentioned trench depth D3 and D4 exceedes 0.5 times of average trench depth DA, then the rigidity in central land portion 5 declines, control stability and anti-irregular wear penalty.Particularly, above-mentioned trench depth D3 and D4 is more preferably more than 0.3 times of above-mentioned average trench depth DA, and is more preferably less than 0.4 times.
In addition, based on the viewpoint playing above-mentioned effect further, the ditch width W3 of central counter drain 7 is preferably more than 15% of the ditch width W2 of shoulder main groove 4, is more preferably more than 20%, is preferably less than 45% in addition, is more preferably less than 40%.Similarly, minimum ditch width (in the present example the ditch width in the wide portion 12) W4 of central transverse 8 is preferably more than 1.0mm, is more preferably more than 2.0mm, is preferably below 5.0mm in addition, is more preferably below 3.5mm.
The pattern block width W 6 of the tire axial of above-mentioned outside pattern block 11 is greater than the pattern block width W 5 of side pattern block 10.Thereby, it is possible to when making turning, effect has the lateral rigidity of the outside pattern block 11 of larger transverse force to increase, thus improve anti-irregular wear performance, control stability.On the other hand, if the pattern block width W 6 of outside pattern block 11 is excessive, then the lateral rigidity excessive descent of side pattern block 10, likely makes the anti-irregular wear penalty of control stability, this part.Therefore the pattern block width W 5 of side pattern block 10 is preferably more than 0.6 times of the pattern block width W 6 of outside pattern block 11, is more preferably more than 0.7 times, is preferably less than 0.9 times in addition, is more preferably less than 0.8 times.
In addition, be provided with the inner side sipes per tire 15 of semi-open type at the side pattern block 10 of present embodiment, inside this, sipes per tire 15 to extend and outer end forms terminal in side pattern block 10 from central main groove 3 outside tire axial.Thus, side pattern block 10 is divided into multiple side pattern block small pieces 10a by inner side sipes per tire 15.The side pattern block small pieces 10a of present embodiment comprises: small pieces 10a1 inside first, and it comprises the bight Ku1 of the acute angle inside the tire axial of side pattern block 10; Small pieces 10a2 inside second, it comprises the bight Ku2 at the obtuse angle inside the tire axial of side pattern block 10.
In addition, be provided with the outside sipes per tire 16 of semi-open type at outside pattern block 11, outside this, sipes per tire 16 to extend and the inner forms terminal in outside pattern block 11 from shoulder main groove 4 inside tire axial.Thus, outside pattern block 11 is divided into multiple outside pattern block small pieces 11a by outside sipes per tire 16.In the present embodiment, outside pattern block small pieces 11a comprises: small pieces 11a1 outside first, and it comprises the bight Ks1 of the acute angle outside the tire axial of outside pattern block 11; Small pieces 11a2 outside second, it comprises the bight Ks2's at the obtuse angle outside the tire axial of outside pattern block 11.
This inner side sipes per tire 15 and outside sipes per tire 16 can not make the rigidity excessive descent in central land portion 5, can relax distortion, suppress the heel toe of each pattern block 10,11 to wear and tear, in addition, can play edge effect, improve the traction property on wet road.
In addition, the total number of inner side sipes per tire 15 is preferably less than the total number of above-mentioned outside sipes per tire 16.Thereby, it is possible to suppress the rigidity of the side pattern block 10 that earth contact pressure is large when keeping straight on traveling to decline, and the outside pattern block 11 of larger transverse force is had to give more marginal element to effect during turning.In addition, can make the earth contact pressure of the outside pattern block 11 that the pattern block width of tire axial is large evenly or relax distortion etc. thus.
In addition, inner side sipes per tire 15 and outside sipes per tire 16 preferably all extend to the direction identical with central transverse 8, and in addition, each sipes per tire 15,16 is preferably formed with the angle that the above-mentioned angle θ 1 with central transverse is identical relative to the angle of tire circumference.This each sipes per tire 15,16 contributes to the higher rigidity guaranteeing each pattern block small pieces 10a, 11a of dividing in side pattern block 10 and outside pattern block 11.
In addition, in order to improve above-mentioned effect further, the tire axial length L5 of inner side sipes per tire 15 be preferably the pattern block width W 5 of side pattern block 10 more than 65% and less than 85%.Similarly, outside sipes per tire 16 tire axial length L6 be preferably outside pattern block 11 pattern block width W 6 more than 65% and less than 85%.
In addition, in the present embodiment, outside second, the minimum length La of the tire circumference of small pieces 11a2 is formed as, and is less than the minimum length Lb of the tire circumference of small pieces 11a1 outside above-mentioned first.Namely, by the above-mentioned minimum length Lb of small pieces 11a1 outside first of the bight Ks1 of the acute angle by comprising the pattern block that rigidity easily declines, be set to be greater than comprise easily fully guarantee the bight Ks2 at the obtuse angle of the pattern block of rigidity second outside the minimum length La of small pieces 11a2, therefore, it is possible to guarantee the rigid balancing of each outside small pieces 11a1 and 11a2, thus can suppress easily at the irregular wear etc. that outside pattern block 11 produces.On the other hand, if above-mentioned minimum length La becomes more too small than above-mentioned minimum length Lb, then respectively the rigid balancing of outside small pieces 11a1,11a2 declines, thus likely makes anti-irregular wear penalty.Therefore outside second small pieces 11a2 above-mentioned minimum length La and first outside the ratio La/Lb of above-mentioned minimum length Lb of small pieces 11a1 be preferably more than 0.65, be more preferably more than 0.75, be preferably less than 0.95 in addition, be more preferably less than 0.85.
Further, in the present embodiment, inside second, the minimum width Wa of the tire axial of small pieces 10a2 is formed as the minimum width Wb of the tire axial being less than small pieces 10a1 inside above-mentioned first.Namely, by the above-mentioned minimum width Wb of small pieces 10a1 inside first of the bight Ku1 of the acute angle by comprising the pattern block that rigidity easily declines be set to be greater than comprise easily fully guarantee the bight Ku2 at the obtuse angle of the pattern block of rigidity second inside the minimum width Wa of small pieces 10a2, thus synthetically guarantee the rigid balancing of each inner side small pieces 10a1 and 10a2, improve control stability.On the other hand, if above-mentioned minimum width Wa becomes more too small than above-mentioned minimum width Wb, the rigid balancing of each inner side small pieces 10a1 and 10a2 can be made on the contrary to decline, thus likely make anti-irregular wear penalty.Therefore inside second small pieces 10a2 above-mentioned minimum width Wa and first inside the ratio Wa/Wb of above-mentioned minimum width Wb of small pieces 10a1 be preferably more than 0.85, be more preferably more than 0.87, be preferably less than 0.95 in addition, be more preferably less than 0.93.
In addition, above-mentioned tire-shoulder land portion 6 is along the continuous and unbroken strip decorative pattern of tire circumference.Thus, improve the rigidity in tire-shoulder land portion 6 further, thus further improve control stability and anti-irregular wear performance.In addition, the effect of the irregular wear of the tyre surface ground terminal Te vicinity suppressing the change of earth contact pressure to increase is larger.
Be provided with in the tire equator C side in the tire-shoulder land portion 6 of present embodiment: extend with little length outside tire axial from shoulder main groove 4 and in tire-shoulder land portion 6, form band ditch 20 in the tire shoulder of terminal; And the length of tire axial is than sipes per tire 21 in the little tire shoulder of band ditch 20 in this tire shoulder.They relax the distortion of strip decorative pattern, contribute to the path wear etc. suppressing easily to produce at the lateral margin of strip decorative pattern.In addition, be provided with in the tyre surface ground terminal Te side in tire-shoulder land portion 6: to extend inside tire axial with little length from tyre surface ground terminal Te and in tire-shoulder land portion 6, form band ditch 22 tire shoulder of terminal; And the outer sipes per tire 23 of the little tire shoulder of the length of tire axial band ditch 22 outer than this tire shoulder.
Above, particularly preferred embodiment of the present invention has been described in detail, but has the invention is not restricted to graphic embodiment, also can be deformed into various mode to implement.
Embodiment
Manufacture and there is the decorative pattern of Fig. 1 and the air-inflation tyre (size: 205/85R15) of the light truck based on the specification of table 1, and their each performance is tested.
Wherein, common specification is as follows.
Tyre surface ground connection width TW:150mm
Rim size: 15 × 5.5J
< central main groove >
Ditch width W1/ tyre surface ground connection width TW:5.1%
Trench depth: 10.1mm
< shoulder main groove >
Ditch width W2/ tyre surface ground connection width TW:6.5%
Trench depth: 10.1mm
< central authorities counter drain >
Ditch width W3/ tyre surface ground connection width TW:1.8%
< central transverse >
Ditch width W4:2.2mm
Trench depth D4:2.3mm
Sipes per tire > inside <
Width: 6.0 ~ 9.0mm
The sipes per tire degree of depth: 8.5mm
Sipes per tire > outside <
Width: 6.0 ~ 9.0mm
The sipes per tire degree of depth: 6.0mm
Other
< each tire shoulder band ditch >
Trench depth: 7.7mm
< each tire shoulder sipes per tire >
Width: 2.0 ~ 5.0mm
The sipes per tire degree of depth: 5.0 ~ 10.0mm
< control stability >
Each examination is assemblied in for tire the four wheels that the Japan with following specification produces light truck, driven to travel on the test route of dried asphalt road by a chaufeur, evaluated by the sensory evaluation pair road-holding property relevant with steering handwheel responsibility, rigidity sense, adherence properties etc. of chaufeur.The index that result is 100 with comparative example 1 represents.The larger expression of numerical value is better.
Free air capacity: 3000cm
3
Interior pressure: 600kPa
Load-carrying: 1t
< wets road performance (sideslip test) >
Utilize above-mentioned testing vehicle, periodically gather way on one side while enter to be provided with the route of the puddles of water that the depth of water is 10mm, length 20m on the asphalt coating that radius is 100m, and measure transverse acceleration (horizontal G), and calculate the average horizontal G of front-wheel under the speed of 55 ~ 80km/h.The index that result is 100 with comparative example 1 represents.Numerical value is the bigger the better.
The anti-irregular wear performance > of <
Under vehicle condition same as described above, the difference of the abrasion loss at two costa colpi places of the tire axial of the shoulder main groove after traveling is measured.Specifically, each examination be assemblied in four wheels for tire and travel 15000km at dried asphalt road, five places in tire circumference being measured, and calculates aviation value.The index that result is 100 with the inverse of comparative example 1 represents.Numerical value is larger, and the less expression of irregular wear amount is better.
The result of test is shown in table 1.
Table 1
The results verification tested, compared with comparative example, the various performances of the tire of embodiment are improved.
Claims (4)
1. an air-inflation tyre, by in tire equator along the tire central main groove that extends continuously of circumference and outside the tire axial two of this central main groove along a pair shoulder main groove that tire circumference extends continuously, and mark off a pair central land portion extended between above-mentioned shoulder main groove and above-mentioned central main groove and a pair tire-shoulder land portion extended between above-mentioned shoulder main groove and tyre surface ground terminal at fetus face, this is airtyred is characterised in that
Be assembled in regular wheel rim at wheel rim and fill in standard pressure and load normal loading and under the state of the loading normal loading being plane with the camber angle ground connection of 0 degree,
The ground plane of fetus face is configured to: the ground contact length of the tire circumference in tire equator be and tire equator interval tyre surface ground connection width 40% 1.05 ~ 1.15 times of ground contact length of tire circumference of tire shoulder position of distance,
Above-mentioned central land portion is configured to: the land portion width of the tire axial in this central land portion is more than 0.8 times of the land portion width of the tire axial in above-mentioned tire-shoulder land portion and is less than 1.0 times, and
Be provided with in above-mentioned central land portion: central counter drain, it more extends along tire circumference by the region of the inner side of tire axial continuously at the midway location than above-mentioned land portion width, and has the trench depth of 0.2 ~ 0.5 times of the average trench depth of the trench depth of above-mentioned central main groove and the trench depth of above-mentioned shoulder main groove; Central transverse, it connects above-mentioned central main groove and above-mentioned shoulder main groove and has the trench depth of 0.2 ~ 0.5 times of above-mentioned average trench depth,
Above-mentioned tire-shoulder land portion is along the continuous and unbroken strip decorative pattern of tire circumference,
The formation in above-mentioned central land portion comprises: more more lean on the outside pattern block outside tire axial by the side pattern block inside tire axial with than above-mentioned central counter drain than above-mentioned central counter drain,
The pattern block width of the tire axial of above-mentioned side pattern block is 0.6 ~ 0.9 times of the pattern block width of above-mentioned outside pattern block.
2. air-inflation tyre according to claim 1, is characterized in that,
Above-mentioned side pattern block is provided with the inner side sipes per tire of the semi-open type extended outside tire axial from above-mentioned central main groove,
Above-mentioned outside pattern block is provided with the outside sipes per tire of the semi-open type extended inside tire axial from above-mentioned shoulder main groove, and
The total number of above-mentioned inner side sipes per tire is less than the total number of above-mentioned outside sipes per tire.
3. air-inflation tyre according to claim 2, is characterized in that,
Above-mentioned side pattern block is 45 ~ 75 degree due to above-mentioned central transverse relative to the angle of tire circumference, forms almost parallel quadrangle form thus,
Above-mentioned outside pattern block is divided into multiple outsides pattern block small pieces by above-mentioned outside sipes per tire,
Above-mentioned outside pattern block small pieces comprise: small pieces outside first, and it comprises the bight in acute angle outside the tire axial of above-mentioned outside pattern block; Small pieces outside second, it comprises the bight in obtuse angle outside the tire axial of above-mentioned outside pattern block,
Outside above-mentioned second, the minimum length La of the tire circumference of small pieces is less than the minimum length Lb of the tire circumference of small pieces outside above-mentioned first.
4. the air-inflation tyre according to Claims 2 or 3, is characterized in that,
Above-mentioned side pattern block is divided into multiple side pattern block small pieces by above-mentioned inner side sipes per tire,
Above-mentioned side pattern block small pieces comprise: small pieces inside first, and it comprises the bight in acute angle inside the tire axial of above-mentioned side pattern block; Small pieces inside second, it comprises the bight in obtuse angle inside the tire axial of above-mentioned side pattern block,
Inside above-mentioned second, the minimum width Wa of the tire axial of small pieces is less than the minimum width Wb of the tire axial of small pieces inside above-mentioned first.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-099298 | 2011-04-27 | ||
| JP2011099298A JP5337196B2 (en) | 2011-04-27 | 2011-04-27 | Pneumatic tire |
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| CN102756619A CN102756619A (en) | 2012-10-31 |
| CN102756619B true CN102756619B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210112705.3A Active CN102756619B (en) | 2011-04-27 | 2012-04-17 | Air-inflation tyre |
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| JP (1) | JP5337196B2 (en) |
| KR (1) | KR101787770B1 (en) |
| CN (1) | CN102756619B (en) |
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| JP5728035B2 (en) * | 2013-01-24 | 2015-06-03 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5698776B2 (en) * | 2013-02-14 | 2015-04-08 | 住友ゴム工業株式会社 | Heavy duty pneumatic tire |
| JP5715655B2 (en) * | 2013-03-22 | 2015-05-13 | 住友ゴム工業株式会社 | Pneumatic tire |
| CN104442208A (en) * | 2013-09-23 | 2015-03-25 | 招远市东晟橡胶制品有限公司 | Vehicle tire |
| JP5952797B2 (en) * | 2013-10-18 | 2016-07-13 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6306436B2 (en) * | 2014-05-30 | 2018-04-04 | 株式会社ブリヂストン | Pneumatic tire |
| JP6002182B2 (en) * | 2014-08-12 | 2016-10-05 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6657587B2 (en) | 2015-04-10 | 2020-03-04 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6561752B2 (en) * | 2015-10-09 | 2019-08-21 | 住友ゴム工業株式会社 | tire |
| JP6790443B2 (en) * | 2016-05-10 | 2020-11-25 | 横浜ゴム株式会社 | Pneumatic tires |
| CN106347033B (en) * | 2016-10-19 | 2018-07-06 | 安徽佳通乘用子午线轮胎有限公司 | A kind of UHP tires for promoting high-speed durability |
| JP6387144B1 (en) * | 2017-04-27 | 2018-09-05 | 東洋ゴム工業株式会社 | Pneumatic tire |
| US20190061430A1 (en) * | 2017-08-30 | 2019-02-28 | Sumitomo Rubber Industries, Ltd. | Pneumatic radial tire |
| JP7092591B2 (en) * | 2018-07-26 | 2022-06-28 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| CN112810387B (en) * | 2019-11-18 | 2023-10-17 | 住友橡胶工业株式会社 | Tire with a tire body |
| JP2022097867A (en) * | 2020-12-21 | 2022-07-01 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP7170769B2 (en) * | 2021-03-18 | 2022-11-14 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tire |
| CN117048250B (en) * | 2023-08-28 | 2024-02-13 | 山东玲珑轮胎股份有限公司 | Energy-saving tyre production device |
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| CN101875285A (en) * | 2009-04-28 | 2010-11-03 | 住友橡胶工业株式会社 | Heavy duty radial tire |
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| JPH05286311A (en) * | 1992-04-06 | 1993-11-02 | Bridgestone Corp | Pneumatic tire |
| JP2664116B2 (en) * | 1992-06-18 | 1997-10-15 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP3136101B2 (en) * | 1996-09-19 | 2001-02-19 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP4133147B2 (en) * | 2002-09-11 | 2008-08-13 | 株式会社ブリヂストン | Pneumatic tire |
| JP4742759B2 (en) * | 2005-09-06 | 2011-08-10 | 横浜ゴム株式会社 | Pneumatic tire |
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| CN101875285A (en) * | 2009-04-28 | 2010-11-03 | 住友橡胶工业株式会社 | Heavy duty radial tire |
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| Publication number | Publication date |
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| JP2012228981A (en) | 2012-11-22 |
| JP5337196B2 (en) | 2013-11-06 |
| KR20120121833A (en) | 2012-11-06 |
| CN102756619A (en) | 2012-10-31 |
| KR101787770B1 (en) | 2017-10-18 |
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