CN103895453B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- CN103895453B CN103895453B CN201310337017.1A CN201310337017A CN103895453B CN 103895453 B CN103895453 B CN 103895453B CN 201310337017 A CN201310337017 A CN 201310337017A CN 103895453 B CN103895453 B CN 103895453B
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Classifications
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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
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1369—Tie bars for linking block elements and bridging the groove
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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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
Abstract
The pneumatic tire of the present invention, balancedly improves drainage performance and abrasion resistance properties.This pneumatic tire, is provided with central main groove (3A), middle tap drain (3B), shoulder main groove (3C), central transverse (4A), middle transverse groove (4B) and tire-shoulder transverse groove (4C) at fetus face (2).Middle transverse groove (4B) and tire-shoulder transverse groove (4C) extend with substantially linear and ditch width is 4.0～16.0mm.Bottom of trench in middle transverse groove (4B) and tire-shoulder transverse groove (4C) is not provided with the lacing wire (T) of more than 50% of the deepest trench depth that height is each traverse furrow from the deepest bottom of trench protuberance.Land ratio through the middle section (5A) at the two ends of center running lug (5) is 1.05～1.25 times of the land ratio of the zone line (6A) through the two ends of middle pattern block (6).Central transverse (4A) is 15～45 ° relative to the angle of tire axial and is more than the middle transverse groove (4B) angle relative to tire axial.
Description
Technical field
The present invention relates to balancedly improve the pneumatic tire of drainage performance and abrasion resistance properties.
Background technology
There is following pneumatic tire, it may be assumed that at fetus face by a plurality of tap drain circumferentially extending along tire with along wheel in the past
The axially extended a plurality of traverse furrow of tire and mark off multiple pattern block.In recent years, to improve such airtyred mar proof
For the purpose of energy, and in traverse furrow, it is provided with the lacing wire of the deepest bottom of trench protuberance from this traverse furrow.When tire rolling, lacing wire suppresses
The tire circumference of pattern block moves, so that the slippage that pattern block produces reduces.
But, pneumatic tire as described above can reduce the ditch volume of traverse furrow because of lacing wire, so that drainage performance is deteriorated.
Further, if the abrasion of pattern block develops further, then it is interrupted due to traverse furrow, the most especially there is drainage latter stage in abrasion
The problem that can be deteriorated.Following patent documentation 1 is there is as correlation technique.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-230643 publication
Summary of the invention
The present invention is made in view of practical situation as described above, and main purpose is to provide a kind of pneumatic tire,
This pneumatic tire improves the ratio of the land ratio of the middle section of fetus face and the land ratio of zone line, and then it is horizontal to improve central authorities
The shape of ditch, middle transverse groove and tire-shoulder transverse groove, as substantially, balancedly improves drainage performance and abrasion resistance properties.
The invention that in the present invention, technical scheme 1 is recorded is a kind of pneumatic tire, by arranging at fetus face: in tire equator
On along 1 central main groove extending of the circumferentially continuous ground of tire；Circumferentially continuous along tire in the tire axial both sides of this central main groove
A pair middle tap drain that ground extends；Along a pair tire shoulder extending of the circumferentially continuous ground of tire between above-mentioned middle tap drain and earth terminal
Tap drain；Connect a plurality of central transverse between above-mentioned central main groove and above-mentioned middle tap drain；Connect above-mentioned middle tap drain with above-mentioned
A plurality of middle transverse groove between shoulder main groove；And it is horizontal to connect a plurality of tire shoulder between above-mentioned shoulder main groove and above-mentioned earth terminal
Ditch, thus has: by the center running lug divided by above-mentioned central main groove, above-mentioned middle tap drain and above-mentioned central transverse along taking turns
A pair center running lug row that tire is provided at circumferentially spaced；Will by above-mentioned middle tap drain, above-mentioned shoulder main groove and above-mentioned in
Between a pair middle pattern block row being provided at circumferentially spaced along tire of the middle pattern block that divides of traverse furrow；And will be by above-mentioned tire
Be provided at circumferentially spaced along tire a pair of the pattern block on tire shoulder that shoulder tap drain, above-mentioned earth terminal and above-mentioned tire-shoulder transverse groove divide
Pattern block on tire shoulder arranges, and this is airtyred is characterised by, above-mentioned middle transverse groove and above-mentioned tire-shoulder transverse groove are prolonged with substantially linear
Stretch and ditch width is 4.0mm～16.0mm, at above-mentioned middle transverse groove and the bottom of trench of above-mentioned tire-shoulder transverse groove, be not provided with from the deepest
Bottom of trench protuberance the deepest trench depth that height is above-mentioned each traverse furrow more than 50% lacing wire, through above-mentioned center running lug
Tire axial two ends tire circumferential line between region that is the land ratio of middle section be: through above-mentioned middle pattern block
Tire axial two ends tire circumferential line between region that is 1.05 times～1.25 times of land ratio of zone line, above-mentioned
Central transverse is 15 °～45 ° relative to the angle of tire axial and is more than the above-mentioned middle transverse groove angle relative to tire axial.
It addition, the invention described in technical scheme 2 is on the basis of the pneumatic tire described in technical scheme 1, at above-mentioned tire
Face has the tread rubber forming outer surface of tire, and the complex modulus E* of above-mentioned tread rubber is 6.3MPa～7.7MPa.
It addition, the invention described in technical scheme 3 is on the basis of the pneumatic tire described in technical scheme 1 or 2, above-mentioned in
Centre tap drain is less than the ditch width of above-mentioned middle tap drain, above-mentioned middle tap drain along tire circumference with linearity extension and its ditch width
And above-mentioned shoulder main groove extends along tire circumference with zigzag and the amplitude of oscillation of each ditch centrage is at more than 2mm.
It addition, the invention described in technical scheme 4 is the airtyred base in technical scheme 1 to 3 described in any one
On plinth, above-mentioned central transverse includes: is arranged in the first central transverse of the side of tire equator and is arranged in the another of tire equator
Second central transverse of side, above-mentioned first central transverse and above-mentioned second central transverse, with identical spacing along tire circumference
Interval is arranged, and staggers half pitch phase place in tire circumference and configure.
It addition, be airtyred basis described in any one in technical scheme 1 to 4 in the invention of technical scheme 5
On, above-mentioned middle transverse groove and the above-mentioned central transverse adjacent with this middle transverse groove, set along tire is circumferentially-spaced with identical spacing
Put, and in tire circumference, stagger half pitch phase place and configure.
It addition, be airtyred basis described in any one in technical scheme 1 to 5 in the invention of technical scheme 6
On, above-mentioned central transverse includes: from above-mentioned central main groove to the medial sulcus portion extended with linearity outside tire axial with from upper
Stating the lateral sulcus portion that middle tap drain extends to tire equator side with linearity, above-mentioned medial sulcus portion and above-mentioned lateral sulcus portion are at tire
Staggered positions in circumference.
It addition, be airtyred basis described in any one in technical scheme 1 to 6 in the invention of technical scheme 7
On, above-mentioned fetus face has the directivity decorative pattern specifying direction of rotation, and above-mentioned central transverse is taken turns towards tire axial lateral
Land inclination tiltedly after tire direction of rotation.
The pneumatic tire of the present invention, fetus face has: in being divided by central main groove, middle tap drain and central transverse
A pair center running lug row that centre pattern block is provided at circumferentially spaced along tire；Will by middle tap drain, shoulder main groove and in
Between a pair middle pattern block row being provided at circumferentially spaced along tire of the middle pattern block that divides of traverse furrow；And will be by tire shoulder master
A pair pattern block on tire shoulder that the pattern block on tire shoulder that ditch, earth terminal and tire-shoulder transverse groove divide is provided at circumferentially spaced along tire
Row.
Middle transverse groove and tire-shoulder transverse groove extend with substantially linear and ditch width is 4.0～16.0mm.In such
Between the resistance of water drainage of traverse furrow and tire-shoulder transverse groove little.Therefore drainage performance is improved.And guarantee middle pattern block and tire shoulder flower
The rigidity of stricture of vagina block is high.Therefore abrasion resistance properties is improved.Bottom of trench in middle transverse groove and tire-shoulder transverse groove is not provided with from the deepest ditch
The lacing wire of more than the 50% of the deepest trench depth that height is each traverse furrow of end protuberance.Even if also thus being able to really latter stage in abrasion
Protect middle transverse groove and the ditch volume of tire-shoulder transverse groove.Improve drainage performance the most further.
Region between the tire circumferential line at the two ends of the tire axial of center running lug that is the land of middle section
Ground ratio is, the region between the tire circumferential line at the two ends of the tire axial of middle pattern block that is the land of zone line
1.05～1.25 times of ratio.Therefore ensure that the rigidity rigidity higher than middle pattern block of center running lug such that it is able to make craspedodrome
During traveling, effect has the center running lug of big load and effect to have generation in the middle pattern block of the load less than center running lug
Earth contact pressure uniform.The most balancedly reduce the slip because of the center running lug caused by tire rolling and middle pattern block
Amount, thus improve abrasion resistance properties.
Central transverse is 15～45 ° relative to the angle of tire axial.The thus ora terminalis of the side that first lands of center running lug
From the impact on road surface when can disperse and relax ground connection.Therefore the slippage making center running lug reduces.It addition, central transverse
It is more than the middle transverse groove angle relative to tire axial relative to the angle of tire axial.Thus center running lug first lands side
Ora terminalis and middle pattern block first land the ora terminalis of side when can balancedly relax ground connection from the impact on road surface.Therefore central authorities are made
The slippage of pattern block and middle pattern block is uniform, thus improves abrasion resistance properties further.Therefore the inflated wheel of the present invention
Tire balancedly improves drainage performance and abrasion resistance properties.
Accompanying drawing explanation
Fig. 1 is the expanded view of the fetus face representing an embodiment of the invention.
Fig. 2 is the X-X sectional view of Fig. 1.
Fig. 3 is the enlarged drawing of the left-half of Fig. 1.
Fig. 4 is the enlarged drawing of the left-half of Fig. 1.
Fig. 5 is the expanded view of the fetus face of other embodiments.
Fig. 6 is the expanded view of the fetus face of another embodiment.
Description of reference numerals: 3A ... central main groove；3B ... middle tap drain；3C ... shoulder main groove；4A ... central transverse；4B…
Middle transverse groove；4C ... tire-shoulder transverse groove；5 ... center running lug；5A ... middle section；6 ... middle pattern block；6A ... zone line；
R ... direction of rotation.
Detailed description of the invention
Hereinafter, based on accompanying drawing, an embodiment of the invention is described.
As it is shown in figure 1, the pneumatic tire of present embodiment is such as suitable as the heavy load inflated wheel of truck, passenger vehicle
Tire, it has the asymmetrical tread contour of direction of rotation R specifying tire.Direction of rotation R of tire is such as with word etc.
Represent in sidewall (not shown).
Fetus face 2 at the tire of present embodiment be provided with in tire equator C along tire circumferentially continuous extend
Article one, central main groove 3A；In the tire axial both sides of this central main groove 3A along a pair middle tap drain extending of the circumferentially continuous ground of tire
3B；Along a pair shoulder main groove 3C extending of the circumferentially continuous ground of tire between middle tap drain 3B and earth terminal Te.Additionally in this reality
Execute in mode, be provided with connecting a plurality of central transverse 4A between central main groove 3A and middle tap drain 3B at fetus face 2；Connect
A plurality of middle transverse groove 4B between middle tap drain 3B and shoulder main groove 3C；And connect between shoulder main groove 3C and earth terminal Te
A plurality of tire-shoulder transverse groove 4C.
Thus, fetus face 2 is configured with: the central authorities that will be divided by central main groove 3A, middle tap drain 3B and central transverse 4A
A pair center running lug row 5R that pattern block 5 is provided at circumferentially spaced along tire；Will by middle tap drain 3B, shoulder main groove 3C with
And a pair middle pattern block row 6R that the middle pattern block 6 of middle transverse groove 4B division is provided at circumferentially spaced along tire；And
The pattern block on tire shoulder 7 divided by shoulder main groove 3C, earth terminal Te and tire-shoulder transverse groove 4C is provided at circumferentially spaced along tire and forms
A pair pattern block on tire shoulder row 7R.
Wherein, " earth terminal " Te is defined as: wheel rim is assembled into regular wheel rim, is filled with regular intrinsic pressure and no-load
The tire of normal state, tire axially outermost ground connection when loading regular load and be grounded on plane with the camber angle of 0 degree
Position.And under normal state, the distance of the tire axial between this earth terminal Te, Te is defined as tyre surface ground connection width
TW.It addition, the size etc. in each portion of tire, it is the value under above-mentioned normal state in the case of non-specified otherwise.
It addition, above-mentioned " regular wheel rim " refers in the schematism including the specification include tire institute foundation, according to often
Individual tire specifies the wheel rim of this specification, such as, if JATMA then represents " standard rim ", if TRA then represents " Design
Rim ", if ETRTO then represents " Measuring Rim ".
It addition, above-mentioned " regular intrinsic pressure " is in the schematism including the specification include tire institute foundation, according to each
Tire specifies the air pressure of each specification, if JATMA then represents " hyperbar ", if TRA then represents table " TIRE LOAD
LIMITS AT VARIOUS COLD INFLATION PRESSURES " described in maximum, if ETRTO then represents
" INFLATION PRESSURE ", but then for 180kPa in the case of tire is passenger car tire.
Additionally, " regular load " refers to, in the schematism including the specification include tire institute foundation, take turns according to each
Tire specifies the load of each specification, if JATMA, is " maximum load capability " then, if TRA, is then table " TIRE LOAD
LIMITS AT VARIOUS COLD INFLATION PRESSURES " if maximum recorded ETRTO, is then " LOAD
CAPACITY ", in the case of tire is passenger car tire, then it is the load of be equivalent to above-mentioned load 88%.
As in figure 2 it is shown, be configured with the tread rubber 2G forming outer surface of tire 2a at fetus face 2.Such tread rubber 2G's
Complex modulus E* is preferably 6.3～7.7MPa.That is, the complex modulus E* at tread rubber 2G is less than the situation of 6.3MPa
Under, then the slippage of the pattern block 5 to 7 during tire rolling increases, thus increases wear extent.Furthermore, it is possible to pattern block 5 to
7 produce heel toe abrasion.In the case of the complex modulus E* of tread rubber 2G is more than 7.7MPa, easily at each tap drain 3A to 3C, each
The bottom of trench of traverse furrow 4A to 4C produces " crack ", thus there is a possibility that the Groove of resistance to TGC(Tread Cracking: tread groove
Crack) degradation.Therefore the complex modulus E* of tread rubber 2G is more preferably more than 6.5MPa, is additionally more preferably
7.5MPa below.
As it is shown on figure 3, central main groove 3A of present embodiment such as extends along tire circumference with linearity.Such central authorities
Water in ditch can be smoothly discharged by tap drain 3A to the rear of tire direction of rotation, and effect when travelling that guarantees to keep straight on has big
The rigidity of tire circumference of center running lug 5 of load high, thus improve abrasion resistance properties, resistance to partial wear performance.
Middle tap drain 3B such as extends along tire circumference with zigzag.The middle tap drain 3B of present embodiment is by middle long limit
Portion 8A alternately configures with middle short leg 8B.Middle long leg 8A has ditch centrage 10a, and this ditch centrage 10a is towards wheel
Land side from the inclination of earth terminal Te lateral tire equator C tiltedly after tire direction of rotation.Middle short leg 8B has ditch centrage 10b,
This ditch centrage 10b tilts to the direction contrary for ditch centrage 10a with middle long leg 8A.Middle long leg 8A and centre
The incline direction of short leg 8B can also be distinguished on the contrary.
Ditch centrage 10 including the middle tap drain 3B of ditch centrage 10a, 10b is by intermediate point s1 and intermediate point s2 alternately
Ground connects and obtains, and wherein intermediate point s1 is the tire axial of the inner side costa colpi 10x inside the tire axial of middle tap drain 3B
The point a2's of the tire axial inner side of the outside costa colpi 10y outside the tire axial of the some a1 and middle tap drain 3B of inner side
Intermediate point, intermediate point s2 be the tire axial of outermost some a3 of tire axial and outside costa colpi 10y of inner side costa colpi 10x
The intermediate point of the some a4 in outside.
Amplitude of oscillation λ 1 of the ditch centrage 10 of middle tap drain 3B is preferably more than 2mm, more preferably more than 4mm.That is, middle main
If amplitude of oscillation λ of ditch 3B 1 is less than 2mm, it is likely that make drainage performance during turning driving be deteriorated.If it addition, middle tap drain 3B
Amplitude of oscillation λ 1 is more than 8mm, then the resistance of water drainage kept straight on when travelling increases, it is possible to make drainage performance be deteriorated.Therefore master in the middle of
Amplitude of oscillation λ 1 of ditch 3B is preferably below 8mm, more preferably below 6mm.In this manual, the ditch centrage 10 of middle tap drain 3B
Amplitude of oscillation λ 1 be intermediate point s1 and the distance of the tire axial of intermediate point s2.
Shoulder main groove 3C such as extends along tire circumference with zigzag.Shoulder main groove 3C of present embodiment is by long for tire shoulder limit
Portion 12A alternately configures with tire shoulder short leg 12B.Tire shoulder long leg 12A has after tire direction of rotation the side that lands from connecing
Ground lateral tire equator C of end Te rolls oblique ditch centrage 13a.Tire shoulder short leg 12B has after tire direction of rotation
Side, ground rolls oblique ditch centrage 13b from tire equator C lateral earth terminal Te.Tire shoulder long leg 12A's and tire shoulder short leg 12B
Incline direction can also be distinguished on the contrary.
Including the ditch centrage 13 of shoulder main groove 3C of ditch centrage 13a, 13b, it is that intermediate point s3 and intermediate point s4 is handed over
Alternately connecting and obtain, wherein intermediate point s3 is the tire axle of the inner side costa colpi 13x inside the tire axial of shoulder main groove 3C
The point a6 of the tire axial inner side of the outside costa colpi 13y outside the some a5 of inner side and the tire axial of shoulder main groove 3C
Intermediate point, intermediate point s4 is inner side outermost some a7 of tire axial of costa colpi 13x and the tire axial of outside costa colpi 13y
The intermediate point of outermost some a8.
According to the reason as amplitude of oscillation λ 1 of the ditch centrage 10 of middle tap drain 3B, the ditch centrage 13 of shoulder main groove 3C
Amplitude of oscillation λ 2 be preferably more than 2mm, more preferably more than 4mm, it is additionally preferred for below 8mm, more preferably below 6mm.Tire shoulder
Amplitude of oscillation λ 2 of the ditch centrage 13 of tap drain 3C defines by the distance of intermediate point s3 with the tire axial of intermediate point s4.
As in figure 2 it is shown, the ditch width W1 of central main groove 3A is less than the ditch width W2 of middle tap drain 3B.Thus, reduction effect
Have the center running lug 5 of big load central main groove 3A costa colpi near earth contact pressure, thus improve abrasion resistance properties.
In order to balancedly improve above-mentioned effect and drainage performance, the ditch width W1(of central main groove 3A and the length direction of ditch
Rectangular ditch width, below for other tap drains 3B, 3C too) it is preferably more than the 0.8% of tyre surface ground connection width TW, more
It is preferably more than 1.2%, it is additionally preferred be less than 2.4%, more preferably less than 2.0%.Equally, the ditch width W2 of middle tap drain 3B
It is preferably more than the 1.5%, more preferably more than 1.0%, it is additionally preferred be less than 4.5% of tyre surface ground connection width TW, more preferably
Less than 4.0%.And the ditch width W3 of shoulder main groove 3C is preferably more than the 1.0% of tyre surface ground connection width TW, more preferably 1.5%
Above, it is additionally preferred be less than 4.0%, more preferably less than 3.5%.
According to raising drainage performance and the viewpoint of the rigidity guaranteeing each pattern block 5 to 7, the trench depth of each tap drain 3A to 3C
D1 to D3 is preferably such as 15～25mm.
As it is shown in figure 1, central main groove 3A is arranged in tire equator C.Tire between middle tap drain 3B and tire equator C
Axial distance L2 is preferably the 12～22% of tyre surface ground connection width TW.Tire axial between shoulder main groove 3C and tire equator C away from
The 28～33% of tyre surface ground connection width TW it are preferably from L3.The most balancedly guarantee the rigidity of the tire axial of each pattern block 5 to 7.
And the moisture film between fetus face 2 and road surface is smoothly discharged.The each position of each tap drain 3A to 3C is by their ditch centrage
Determine.The most as in the present embodiment, as in jagged non-directional middle tap drain 3B and shoulder main groove 3C, adopt
With the middle amplitude of oscillation centrage G1 of ditch centrage 10 of tap drain 3B, the amplitude of oscillation centrage G2 of the ditch centrage 13 of shoulder main groove 3C.
Central transverse 4A lands inclination tiltedly from tire equator C side after earth terminal Te lateral tire direction of rotation.So
Central transverse 4A can utilize the rolling of tire, the water in ditch is discharged to earth terminal Te side swimmingly from tire equator C side.
As it is shown on figure 3, central transverse 4A is 15～45 ° relative to the angle, θ 1 of tire axial.That is, in central transverse 4A
In the case of angle, θ 1 is less than 15 °, then in ora terminalis 5x(Fig. 3 of the side that first lands of center running lug 5, for center running lug 5 times
The ora terminalis of side) cannot will disperse from the impact on road surface along tire circumference during ground connection.Therefore the slippage of center running lug 5 increases
Greatly so that abrasion resistance properties, the degradation of resistance to partial wear.And drainage performance when making craspedodrome travel is deteriorated.In central transverse
In the case of the angle, θ 1 of 4A is more than 45 °, the rigidity of the tire axial of center running lug 5 reduces, so that abrasion resistance properties, resistance to
Partial wear degradation.Drainage performance during turning driving is made to be deteriorated.Therefore the angle, θ 1 of central transverse 4A be preferably 20 ° with
On, it is additionally preferred it is less than 40 °.It addition, the angle of the ditch centrage 14 that angle, θ 1 is central transverse 4A of central transverse 4A (with
Under, angle, θ 2, θ 3 for middle transverse groove 4B and tire-shoulder transverse groove 4C define too), the wherein ditch center of central transverse 4A
Line 14 will couple together between intermediate point b1, b2 of the tire circumference of the opening of the both sides of central transverse 4A.
As it is shown in figure 1, central transverse 4A of present embodiment is formed as including: be arranged in side (Fig. 1 of tire equator C
In for left side) the first central transverse 15A and the second central authorities of the opposite side (for right side in Fig. 1) that is arranged in tire equator C horizontal
Ditch 15B.First central transverse 15A and the second central transverse 15B are provided at circumferentially spaced along tire with identical spacing Pa.The
One central transverse 15A and the second central transverse 15B stagger half pitch phase place in tire circumference and configure.That is, central authorities are horizontal
Ditch 4A is arranged side by side on tire axial with the central part of the tire circumference of center running lug 5.Thus, by by central transverse 4A
Angle, θ 1 be set to above-mentioned scope, thus suppress near the tire circumference two ends of the center running lug 5 that the rigidity of tire axial is little
Slide to tire axial.Therefore abrasion resistance properties and resistance to partial wear performance are improved.
As shown in Figure 4, central transverse 4A includes: from central main groove 3A with linearity to the inner side extended outside tire axial
Ditch portion 16A and the lateral sulcus portion 16B extended to tire equator C side with linearity from middle tap drain 3B.Medial sulcus portion 16A is with outer
Lateral sulcus portion 16B staggered positions in tire circumference.Such as, the tire axial outer end 17e of the ditch centrage 17a of medial sulcus portion 16A
The ditch that tire circumferential distance La is medial sulcus portion 16A with tire axial the inner 17i of the ditch centrage 17b of lateral sulcus portion 16B
The 13～23% of width W4a.Such central transverse 4A balancedly improves the tire circumference end of drainage performance and center running lug 5
The rigidity in portion.
The tire axial outer end 17e of the ditch centrage 17a of medial sulcus portion 16A be from central main groove 3A with linearity towards wheel
The intermediate point of the tire axial outer end of costa colpi 18x, 18y of central transverse 4A of the axially external extension of tire.The ditch of lateral sulcus portion 16B
Tire axial the inner 17i of centrage 17b is horizontal towards the central authorities extended inside tire axial with linearity from middle tap drain 3B
The intermediate point that the tire axial of costa colpi 18z, 18w of ditch 4A is inner.
According to viewpoint during tire rolling, the water in ditch being smoothly discharged from tire equator C lateral earth terminal Te side, with
And guaranteeing the viewpoint of the rigidity of center running lug 5, the ditch width W4(of such central transverse 4A is rectangular with ditch centrage 14
Average groove width degree, for middle transverse groove 4B, tire-shoulder transverse groove 4C too) such as it is preferably 4～16mm.
Middle transverse groove 4B and tire-shoulder transverse groove 4C extend with substantially linear.It is possible to from middle tap drain 3B via middle horizontal
Ditch 4B and tire-shoulder transverse groove 4C and to vehicle outside draining swimmingly.And, it is ensured that middle pattern block 6 and pattern block on tire shoulder 7
Rigidity is high.Therefore, it is possible to balancedly improve drainage performance and abrasion resistance properties.
As shown in Figure 4, " substantially linear " refers to following ditch, it may be assumed that in middle transverse groove 4B, in the side of tire circumference
Costa colpi 20x(Fig. 4 in, for the costa colpi of upside) on closest to middle transverse groove 4B ditch centrage 21 some 20a and tire week
To opposite side costa colpi 20y(Fig. 4 in, for the costa colpi of downside) on closest to the some 20b of ditch centrage 21 relative to ditch center
Distance W5a in the direction that line 21 is rectangular is: more than the 80% of the ditch width W5 of middle transverse groove 4B.Such middle transverse groove 4B by
In guaranteeing that resistance of water drainage is little, therefore keep high drainage performance.As the situation of middle transverse groove 4B, tire-shoulder transverse groove 4C " substantially
Linearity " be tire-shoulder transverse groove 4C ditch width W6(Fig. 1 that inner distance W6a is tire-shoulder transverse groove 4C shown in) more than 80%
Ditch.
Middle transverse groove 4B lands inclination tiltedly from tire equator C side after earth terminal Te lateral tire direction of rotation.Therefore
As the situation of central transverse 4A, when tire rolling, it is possible to by the water in ditch swimmingly from the lateral earth terminal of tire equator C
Te side is discharged.According to same viewpoint, tire-shoulder transverse groove 4C also from tire equator C side towards earth terminal Te lateral tire direction of rotation
After land inclination tiltedly.
The ditch width W5 of middle transverse groove 4B is 4.0～16.0mm.That is, the ditch width W5 in middle transverse groove 4B is less than 4.0mm
In the case of, drainage performance is deteriorated.In the case of the ditch width W5 of middle transverse groove 4B is more than 16.0mm, middle pattern block 6
The rigidity of tire circumference reduces, so that the degradation of resistance to partial wear.Therefore the ditch width W5 of middle transverse groove 4B is preferably 4.5mm
Above, it is additionally preferred for below 15.5mm.According to same viewpoint, the ditch width W6 of tire-shoulder transverse groove 4C is more than 4.0mm, preferably
For more than 4.5mm, and the ditch width W6 of tire-shoulder transverse groove 4C is below 16.0mm, preferably below 15.5mm.
As it is shown on figure 3, middle transverse groove 4B is less than the angle, θ 1 of central transverse 4A relative to the angle, θ 2 of tire axial.Keep straight on
During traveling, center running lug 5 effect has the load bigger than middle pattern block 6.Specify the most as described above each traverse furrow 4A,
The angle of 4B, thus the ora terminalis 6x of the side that first lands of the ora terminalis 5x of the side that first lands of center running lug 5 and middle pattern block 6
From the impact on road surface when can balancedly relax ground connection.Therefore the slippage of center running lug 5 and middle pattern block 6 becomes
Uniformly, thus improve abrasion resistance properties further.
In order to the slippage making center running lug 5, middle pattern block 6 and pattern block on tire shoulder 7 is uniform, middle transverse groove 4B
Angle, θ 2 is preferably formed into more than tire-shoulder transverse groove 4C relative to the angle, θ 3 of tire axial.
In order to effectively play above-mentioned effect, the angle, θ 2 of middle transverse groove 4B is preferably more than 3 °, more preferably more than 4 °,
Additionally it is preferably less than 10 °, more preferably less than 9 °.The angle, θ 3 of tire-shoulder transverse groove 4C is preferably more than 0.5 °, more preferably 1 °
Above, it is additionally preferred be less than 5 °, more preferably less than 4.5 °.
As it is shown in figure 1, spacing Pb of middle transverse groove 4B is identical with spacing Pa of central transverse 4A.Middle transverse groove 4B and central authorities
Traverse furrow 4A staggers half pitch phase place in tire circumference and configures.That is, central transverse 4A is circumferential with the tire of middle pattern block 6
Central part be arranged side by side along tire axial.Further, middle transverse groove 4B and the central part of the tire axial of center running lug 5 are at wheel
It is arranged side by side on tire is axial.Thus the ora terminalis of the tire circumference both sides of suppression center running lug 5 slides along tire axial and presses down
The ora terminalis of the tire circumference both sides of middle pattern block 6 processed slides along tire axial.Improve the most further abrasion resistance properties, resistance to partially
Polishing machine.
As in figure 2 it is shown, the bottom of trench in middle transverse groove 4B of present embodiment is not provided with lacing wire.Thus, even if at abrasion end
Phase can also ensure that the ditch volume of middle transverse groove 4B.Improve drainage performance the most further.It addition, at the bottom of trench of middle transverse groove 4B
Lacing wire (being represented by dashed line) T, this lacing wire T can also be set from the height H1 of the deepest bottom of trench protuberance less than middle transverse groove 4B
The 50% of deep trench depth D5.The probability that drainage performance is made a big impact by such lacing wire T is little.According to improving further
The viewpoint of drainage performance, the bottom of trench in tire-shoulder transverse groove 4C of present embodiment is also not provided with lacing wire.Additionally with middle transverse groove 4B
Situation is same, it is also possible to setting is less than the deepest trench depth D6 of tire-shoulder transverse groove 4C from the height H2 of the deepest bottom of trench protuberance
Lacing wire (being represented by dashed line) T of 50%.
Though non-particular determination, but in order to balancedly guarantee drainage performance and the rigidity in each land portion 5,6 and 7, central authorities are horizontal
Ditch 4A and trench depth D4 of middle transverse groove 4B and D5 are such as preferably 15.0～25.0mm.Trench depth D6 of tire-shoulder transverse groove 4C
Such as it is preferably 10.0～20.0mm.
As shown in Figure 4,1.05～1.25 times of the land ratio Lm that land ratio Lc is zone line 6A of middle section 5A.In
Centre region 5A is the region between tire circumferential line 5c of tire axial two ends 5e, 5e through center running lug 5,5c.Middle
Region 6A is the region between tire circumferential line 6c of tire axial two ends 6e, 6e through middle pattern block 6,6c.In central authorities
In the case of the land ratio Lc of region 5A is less than 1.05 times of the land ratio Lm of zone line 6A, or the land of middle section 5A
In the case of 1.25 times of the land ratio Lm exceeding zone line 6A than Lc, then cannot balancedly guarantee the firm of center running lug 5
Property and the rigidity of middle pattern block 6 so that earth contact pressure when center running lug 5 and middle pattern block 6 travel becomes uneven
Even.Therefore during tire rolling, the difference of the slippage of center running lug 5 and middle pattern block 6 increases, so that resistance to partial wear
Can be deteriorated.
Prolong along tire axial with substantially crank-like when each pattern block 5 to 7 of present embodiment is provided with top view
The rill 22 stretched.Such rill 22 can reduce the tire circumferential lengths of each pattern block 5 to 7, suppresses tire rolling to produce
Slippage.
Rigidity in order to ensure each pattern block 5 to 7 is high and suppresses slippage, the width W7 of rill be preferably 1.0～
3.0mm left and right.Equally, shown in degree of depth D7(Fig. 2 of rill) it is preferably 1.0～about 4.0mm.
Being provided with chamfered section m on center running lug 5, middle pattern block 6 and pattern block on tire shoulder 7, this chamfered section m is right
The top that top that each tap drain 3 intersects with each traverse furrow 4 and each tap drain 3 and rill 22 intersect is with roughly triangular shape obliquely
Formed after cutting.Such chamfered section m can improve the rigidity of each pattern block 5 to 7, and suppress to become pattern block defect,
The starting point of partial wear.
Above, although embodiments of the present invention are explained, but the present invention be not limited to above-mentioned specifically
Embodiment but various mode can be changed to and implement.
Embodiment
Weight in order to confirm the effect of the present invention, to the 11.00R20 of the motif and specification based on table 1 with Fig. 1
Load pneumatic tire is tested.In addition to the ditch that table 1 is recorded, the ditch width of each ditch and angle etc. are as shown in Figure 1.
It addition, the main common specification of each tire is as follows.
Tyre surface ground connection width TW:242.4mm
The trench depth of each tap drain: 21.0mm
The trench depth of central transverse: 21.0mm
The trench depth of middle transverse groove: 21.0mm
The trench depth of tire shoulder: 14.5mm
The trench depth of rill: 2.0mm
Method of testing is as follows.
＜ drainage performance (wet road braking) ＞
Under the following conditions, by each Japan's product truck (2-D car, installation abs braking being installed on loading capacity 8t for examination tire
Device) full wheel.Further, test driver makes test vehicle up at the test route of the bituminous paving of the depth of water 0.5～2.0mm
Sail, and come into effect brake hard from speed 65km/h.Now measure braking when speed 60km/h to 20km/h away from
From.Result is with the inverse of braking distance, and represents with the index that value is 100 of embodiment 1.Numerical value is the bigger the better, and less than 90
For defective.
Wheel rim: 8.00 × 20
Intrinsic pressure: 780kPa
Loading conditions: each tire 30.4kN in drive shaft
The length of the ditch centrage of each traverse furrow of the length of lacing wire/be provided with lacing wire: 30%(embodiment 6,7 and comparative example
5,6)
＜ abrasion resistance properties ＞
Test driver makes above-mentioned test vehicle travel 10000km on dried asphalt road.Afterwards in tire circumference
8 position measurements central main groove and the ditch surplus of middle tap drain.Result is with the meansigma methods of ditch surplus, and with embodiment 1
The index that value is 100 represent.Numerical value is the bigger the better, and less than 90 is defective.
＜ resistance to partial wear performance ＞
Central authorities' flower of each test tire that 8 position measurements in tire circumference use under above-mentioned abrasion resistance properties
The difference of the wear extent of the block edge of the tire circumference both sides of stricture of vagina block and the decorative pattern of the tire circumference both sides of middle pattern block
The difference of the wear extent of block edge.Result is with the inverse of the meansigma methods of the difference of wear extent, and with the index that value is 100 of embodiment 1
Represent.Numerical value is the bigger the better, and 90 is defective.
＜ resistance to TGC performance ＞
While the ozone (500L/H) of ejection concentration 50pphm, make each test tire at tumbler test in following condition
Travel on machine.After traveling, by the crack of the perusal bottom of trench of experimenter.The result tire maximum with crack, for " 1 ", does not produces
5 point-scores that tire is " 5 " in raw crack represent.Experimental condition is as follows.
Intrinsic pressure: 780kPa
Load: 30.4kN
Speed: 80km/h
Running time: 400 hours
Test results etc. are shown in table 1.
Table 1
The result of test is able to confirm that, compared with comparative example, improves each performance the tyre equalizing of embodiment.It addition,
The ditch width making middle transverse groove and tire-shoulder transverse groove changes in preferred numerical range and is tested, result and this test
Result is identical.
Claims (7)
1. a pneumatic tire, by arranging at fetus face: along 1 central authorities extending of the circumferentially continuous ground of tire in tire equator
Tap drain；In the tire axial both sides of this central main groove along a pair middle tap drain extending of the circumferentially continuous ground of tire；In above-mentioned centre
Along a pair shoulder main groove extending of the circumferentially continuous ground of tire between tap drain and earth terminal；Connect above-mentioned central main groove and above-mentioned centre
A plurality of central transverse between tap drain；Connect a plurality of middle transverse groove between above-mentioned middle tap drain and above-mentioned shoulder main groove；And
Connect a plurality of tire-shoulder transverse groove between above-mentioned shoulder main groove and above-mentioned earth terminal,
Thus have: the center running lug edge that will be divided by above-mentioned central main groove, above-mentioned middle tap drain and above-mentioned central transverse
A pair center running lug row that tire is provided at circumferentially spaced；Will be by above-mentioned middle tap drain, above-mentioned shoulder main groove and above-mentioned
A pair middle pattern block row that the middle pattern block that middle transverse groove divides is provided at circumferentially spaced along tire；And will be by above-mentioned
The pattern block on tire shoulder that shoulder main groove, above-mentioned earth terminal and above-mentioned tire-shoulder transverse groove divide be provided at circumferentially spaced along tire one
Pattern block on tire shoulder is arranged,
This is airtyred is characterised by,
Above-mentioned middle transverse groove and above-mentioned tire-shoulder transverse groove extend with substantially linear and ditch width is as 4.0mm～16.0mm,
At above-mentioned middle transverse groove and the bottom of trench of above-mentioned tire-shoulder transverse groove, be not provided with from the height of the deepest bottom of trench protuberance be above-mentioned respectively
The lacing wire of more than the 50% of the deepest trench depth of traverse furrow,
Region between the tire circumferential line at the tire axial two ends of above-mentioned center running lug that is the land of middle section
Ratio is: the region between the tire circumferential line at the tire axial two ends of above-mentioned middle pattern block that is the land of zone line
1.05 times of ratio～1.25 times,
Above-mentioned central transverse is 15 °～45 ° relative to the angle of tire axial and is more than above-mentioned middle transverse groove relative to tire axle
To angle.
Pneumatic tire the most according to claim 1, it is characterised in that
The tread rubber forming outer surface of tire it is configured with at above-mentioned fetus face,
The complex modulus E* of above-mentioned tread rubber is 6.3MPa～7.7MPa.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
Above-mentioned central main groove is less than the ditch width of above-mentioned middle tap drain along tire circumference with linearity extension and its ditch width,
Above-mentioned middle tap drain and above-mentioned shoulder main groove exist along tire circumference with the amplitude of oscillation of zigzag extension and each ditch centrage
More than 2mm.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
Above-mentioned central transverse includes: is arranged in the first central transverse of the side of tire equator and is arranged in the another of tire equator
Second central transverse of side,
Above-mentioned first central transverse and above-mentioned second central transverse, be provided at circumferentially spaced along tire with identical spacing, and
The half pitch that staggers in tire circumference phase place and configure.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
Above-mentioned middle transverse groove and the above-mentioned central transverse adjacent with this middle transverse groove, set along tire is circumferentially-spaced with identical spacing
Put, and in tire circumference, stagger half pitch phase place and configure.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
Above-mentioned central transverse includes: from above-mentioned central main groove to the medial sulcus portion extended with linearity outside tire axial and from
The lateral sulcus portion that above-mentioned middle tap drain extends to tire equator side with linearity,
Above-mentioned medial sulcus portion and above-mentioned lateral sulcus portion staggered positions in tire circumference.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
Above-mentioned fetus face has the directivity decorative pattern specifying direction of rotation,
Above-mentioned central transverse lands inclination tiltedly after the tire direction of rotation of tire axial lateral.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012283375A JP5739862B2 (en) | 2012-12-26 | 2012-12-26 | Heavy duty pneumatic tire |
| JP2012-283375 | 2012-12-26 |
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| Publication Number | Publication Date |
|---|---|
| CN103895453A CN103895453A (en) | 2014-07-02 |
| CN103895453B true CN103895453B (en) | 2016-11-02 |
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ID=50987167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310337017.1A Active CN103895453B (en) | 2012-12-26 | 2013-08-05 | Pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5739862B2 (en) |
| CN (1) | CN103895453B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105555549B (en) | 2013-10-04 | 2017-10-31 | 住友橡胶工业株式会社 | Pneumatic tire |
| JP6043265B2 (en) * | 2013-10-04 | 2016-12-14 | 住友ゴム工業株式会社 | Pneumatic tire |
| WO2015154843A1 (en) | 2014-04-11 | 2015-10-15 | Merck Patent Gmbh | Materials for organic electroluminescent devices |
| JP6529834B2 (en) * | 2015-06-17 | 2019-06-12 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Non pneumatic tire |
| FR3044596A1 (en) * | 2015-12-07 | 2017-06-09 | Michelin & Cie | PNEUMATIC TIRE TREAD FOR HEAVY VEHICLE TYPE GENIE CIVIL |
| FR3044597A1 (en) | 2015-12-07 | 2017-06-09 | Michelin & Cie | PNEUMATIC TIRE TREAD FOR HEAVY VEHICLE TYPE GENIE CIVIL |
| JP6766561B2 (en) * | 2016-09-29 | 2020-10-14 | 住友ゴム工業株式会社 | tire |
| JP6977274B2 (en) * | 2017-02-23 | 2021-12-08 | 横浜ゴム株式会社 | Pneumatic tires |
| EP3378678B1 (en) * | 2017-03-24 | 2021-01-20 | Sumitomo Rubber Industries, Ltd. | Tire |
| JP6859802B2 (en) | 2017-03-30 | 2021-04-14 | 住友ゴム工業株式会社 | tire |
| WO2018229578A1 (en) * | 2017-06-12 | 2018-12-20 | Pirelli Tyre S.P.A. | Tyre for vehicle wheels |
| JP6985896B2 (en) * | 2017-11-08 | 2021-12-22 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| JP7131337B2 (en) | 2018-11-29 | 2022-09-06 | 横浜ゴム株式会社 | pneumatic tire |
| JP7415156B2 (en) | 2020-01-17 | 2024-01-17 | 横浜ゴム株式会社 | tire |
| TWI803826B (en) * | 2021-02-09 | 2023-06-01 | 正新橡膠工業股份有限公司 | Tire tread noise reduction structure |
| CN114905893A (en) * | 2021-02-09 | 2022-08-16 | 正新橡胶工业股份有限公司 | Tire pattern noise reducing structure |
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| CN1769078A (en) * | 2004-10-13 | 2006-05-10 | 住友橡胶工业株式会社 | Heavy load type belt tyre |
| CN1781741A (en) * | 2004-11-18 | 2006-06-07 | 住友橡胶工业株式会社 | Heavy duty pneumatic tire |
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| JP5060573B2 (en) * | 2010-03-15 | 2012-10-31 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5249362B2 (en) * | 2010-03-16 | 2013-07-31 | 住友ゴム工業株式会社 | Rubber composition for tire and pneumatic tire |
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| CN1769078A (en) * | 2004-10-13 | 2006-05-10 | 住友橡胶工业株式会社 | Heavy load type belt tyre |
| CN1781741A (en) * | 2004-11-18 | 2006-06-07 | 住友橡胶工业株式会社 | Heavy duty pneumatic tire |
| CN102199316A (en) * | 2010-03-16 | 2011-09-28 | 住友橡胶工业株式会社 | Tire rubber composition and pneumatic tire |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2014125109A (en) | 2014-07-07 |
| JP5739862B2 (en) | 2015-06-24 |
| CN103895453A (en) | 2014-07-02 |
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