CN104108289A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- CN104108289A CN104108289A CN201410085555.0A CN201410085555A CN104108289A CN 104108289 A CN104108289 A CN 104108289A CN 201410085555 A CN201410085555 A CN 201410085555A CN 104108289 A CN104108289 A CN 104108289A
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- tire
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- tap drain
- tire shoulder
- ditch
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Abstract
The invention provides a pneumatic tire which can maintain turning stability and improve the wet road performance and the passenger comfort performance. The pneumatic tire comprises a pair of tire shoulder main trenches (3) and a central main trench (4) at a tread portion (2) so that a pair of intermediate land portions (6) is defined. Each intermediate land portion (6) comprises an outer side intermediate land portion (6A) which is provided with an outer side intermediate cross trench (20) with the trench width of 0.5mm-1.5mm and is not provided with trenches with the width greater than 1.5mm. Each outer side intermediate cross trench (20) comprises a first tilting portion (21) tilting relative to the axial direction of the tire and a second tilting portion (22) tilting towards the direction opposite to the first tilting portion (21).
Description
Technical field
The air-inflation tyre that stability Qie Shishi road performance while the present invention relates to maintain turning and ride comfort can improve.
Background technology
At airtyred fetus face, be provided with the tap drain circumferentially extending continuously along tire.Such tap drain improves tire Shi road performance.
Yet tap drain likely exists the stability while making the rigidity of fetus face reduce and make to turn (to be sometimes referred to as below " turning stability ".) problem that reduces.
For example, in following patent documentation 1, propose to have following air-inflation tyre, that is: when carrying out vehicle installation, be positioned at the land part by vehicle outside than tire equator and be set to along the circumferential continuous rib of tire.Such air-inflation tyre increases the rigidity of the land part of vehicle outside, and the stability that makes to turn improves.
Yet there is the problem that reduces wet road performance and ride comfort energy in such air-inflation tyre.
Patent documentation 1: TOHKEMY 2009-149124 communique
Summary of the invention
The present invention proposes in view of above-mentioned actual conditions, and it is a kind of with being shaped as of land part in the middle of improving air-inflation tyre basic, that maintain turning stability and the wet road performance of raising and ride comfort energy that its object is to provide.
The invention that technical scheme 1 in the present invention is recorded is a kind of air-inflation tyre, this air-inflation tyre is by being arranged on the distolateral a pair of tire shoulder tap drain circumferentially extending continuously along tire of ground connection of the both sides of tire equator and tyre surface at fetus face, and the central tap drain circumferentially extending continuously along tire between described a pair of tire shoulder tap drain, come the both sides in tire equator, and land part in the middle of marking off between described tire shoulder tap drain and described central tap drain, and this airtyred installation direction towards vehicle is appointed, described airtyred being characterised in that, in the middle of described, land part is included in when vehicle is installed and is configured in than tire equator by land part in the middle of the outside of vehicle outside, in the middle of described outside, land part is provided with and will between described central tap drain and described tire shoulder tap drain, be communicated with, and traverse furrow in the middle of the outside that ditch width is 0.5mm～1.5mm, and be not provided with the ditch that ditch width is greater than 1.5mm, in the middle of described outside, traverse furrow comprises the first rake with respect to tire axial inclination, and with second rake towards inclination contrary with described the first rake.
And, invention described in technical scheme 2, on the airtyred basis described in technical scheme 1, in the middle of described, land part is included in when vehicle is installed and is configured in than tire equator by land part in the middle of the inner side of vehicle interior side, in the middle of described inner side, land part is provided with centre, many inner sides traverse furrow being communicated with up between described central tap drain and described tire shoulder tap drain, and in the middle of described inner side, traverse furrow comprises that ditch width is that the thin-width part of 0.5mm～1.5mm and ditch width are greater than 1.5mm and the thick width portion below 4.0mm.
And, the invention described in technical scheme 3, on the airtyred basis described in technical scheme 2, described thin-width part is communicated with described tire shoulder tap drain, and described thick width portion is communicated with described central tap drain.
And, invention described in technical scheme 4, on airtyred basis in technical scheme 1 to 3 described in any one, described tire shoulder tap drain is included in the outside tire shoulder tap drain that is configured in tire axial outside when vehicle is installed, in the tire radial cross section that comprises tire rotation axle, the furrow bank face of the tire axial of described outside tire shoulder tap drain inner side comprises: the steeply inclined face extending towards tire radial outside from the ditch bottom of described outside tire shoulder tap drain; And the gently sloping surface portion of gently tilting than this greatly sloped side.
And, the invention described in technical scheme 5, on the airtyred basis described in technical scheme 4, the circular-arc curved surface in tire outside with center is caved in in described gently sloping surface portion.
And, invention described in technical scheme 6, on airtyred basis in technical scheme 1 to 5 described in any one, described fetus face more has tire shoulder land part by the position in tire axial outside than described tire shoulder tap drain, described tire shoulder land part comprises that vehicle is configured in tire shoulder land, the outside part of vehicle outside while installing, tire shoulder land, described outside part, by ditch width, than described tire shoulder tap drain, tire shoulder rill little and that circumferentially extend continuously along tire is divided into, the inside portion of the outside portion in tire axial outside and tire axial inner side, described inside portion is the rib circumferentially extending continuously along tire.
And, invention described in technical scheme 7, on airtyred basis in technical scheme 1 to 6 described in any one, in the tire radial cross section that comprises tire rotation axle, the ditch wall in the tire axial outside of described tire shoulder tap drain, with respect to the furrow rim in the tire axial outside through described tire shoulder tap drain and perpendicular to the normal of the tread of described fetus face, with the angle of 16o～20o, tilt.
And, invention described in technical scheme 8, on airtyred basis in technical scheme 1 to 7 described in any one, in the middle of described outside, traverse furrow comprises the connecting portion between described the first rake and described the second rake, and described connecting portion is located at the position by tire axial inner side than the center of the tire axial of land part in the middle of described outside.
Air-inflation tyre of the present invention has and when vehicle is installed, is configured in than tire equator by land part in the middle of the outside of vehicle outside.In the middle of outside, land part is provided with centre, outside that be communicated with and that ditch width is 0.5mm～1.5mm traverse furrow between central tap drain and tire shoulder tap drain.So middle traverse furrow Shi Shi road, outside performance improves, and appropriateness is alleviated the rigidity of middle land, outside part and improved ride comfort energy.
In addition, in the middle of outside, land part is not provided with the ditch that ditch width is greater than 1.5mm.Thus, suppress the significantly decline of the rigidity of middle land, outside part.Therefore, maintain turning stability.
In addition, in the middle of outside, traverse furrow comprises with respect to the first rake of tire axial inclination and with second rake towards inclination contrary with the first rake.In the middle of outside, traverse furrow is owing to having specified as described above ditch width, and therefore, when loading ground contact load, in the middle of outside, the ditch wall of traverse furrow is mutually close to and becomes one.Now, because traverse furrow in the middle of outside comprises the first rake and second rake of mutual reversal dip, therefore in the middle of outside, land part suppresses the shear deformation of tire axial effectively.Therefore, more effectively maintain turning stability.
Accompanying drawing explanation
Fig. 1 is the expansion drawing of the airtyred fetus face of present embodiment.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the enlarged drawing of middle land, the outside part of Fig. 1.
The block diagram of land part in the middle of outside when Fig. 4 (a) is non-loaded, (b) is the block diagram of land part in the middle of the outside that in the middle of outside, the ditch wall of traverse furrow is close to mutually.
Fig. 5 is the enlarged drawing of middle land, the inner side part of Fig. 1.
Fig. 6 is the enlarged drawing of tire shoulder land, the outside part of Fig. 1.
Fig. 7 is the enlarged drawing of tire shoulder land, the inner side part of Fig. 1.
Fig. 8 is the enlarged drawing of the central land part of Fig. 1.
Fig. 9 (a) is the amplification view of inner side tire shoulder tap drain, is (b) amplification view of outside tire shoulder tap drain.
Description of reference numerals
2: fetus face; 3: tire shoulder tap drain; 4: central tap drain; 6A: land part in the middle of outside; 6: middle land part; 20: traverse furrow in the middle of outside; 21: the first rakes; 22: the second rakes.
The specific embodiment
As shown in Figure 1, the air-inflation tyre of present embodiment (following, to be sometimes only recited as " tire ") the 1st, the appointed air-inflation tyre of direction of installing to vehicle.The vehicle outside when left side of the tire 1 of Fig. 1 is vehicle installation.The tire of present embodiment is asymmetric with respect to tire equator C left and right.The suitable radial tyre as car of tire 1 of present embodiment is used.
Fetus face 2 at tire 1 is provided with a pair of tire shoulder tap drain 3,3 and a pair of central tap drain 4,4.
Tire shoulder tap drain 3 in the both sides of tire equator C and the ground terminal Te side of tyre surface along tire, circumferentially extend continuously.The tire shoulder tap drain 3 of present embodiment has roughly fixing ditch width and is linearity.Tire shoulder tap drain 3 is included in the inner side tire shoulder tap drain 3B that is configured in the outside tire shoulder tap drain 3A of vehicle outside and is configured in vehicle interior side when vehicle is installed.
" tyre surface ground terminal Te " refers to: wheel rim is assembled in to regular wheel rim (not shown) and the tire 1 that is filled with under the normal state that regular interior pressure there is no loading loads regular load, and the outermost earthing position of tire axial while making this tire be grounded on plane with 0 ° of camber angle.
Described " regular wheel rim " refers to: in the schematism of the specification that comprises tire institute foundation, this specification is according to the determined wheel rim of each tire, for example, if JATMA is " standard rim ", if TRA is " Design Rim ", if ETRTO is " Measuring Rim ".
Described " regular interior pressure " refers to: in the schematism of the specification that comprises tire institute foundation, this specification is according to the determined air pressure of each tire, for example, if JATMA is " the highest air pressure ", if TRA is the maxim for recording in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO is " INFLATION PRESSURES ".
Described " regular load " refers to: in the schematism of the specification that comprises tire institute foundation, this specification is according to the determined load of each tire, for example, if JATMA is " maximum load ability ", if TRA is the maxim for recording in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO is " LOAD CAPACITY ".
Central authorities' tap drain 4 circumferentially extends continuously along tire between tire shoulder tap drain 3,3 and in the both sides of tire equator C.The central tap drain 4 of present embodiment has roughly fixing ditch width and is linearity.Central authorities' tap drain 4 is included in the tap drain 4B of inner side central authorities that is configured in the outside tap drain 4A of central authorities of vehicle outside when vehicle is installed and is configured in vehicle interior side.
The ditch width W2 of the ditch width W1 of tire shoulder tap drain 3 and central tap drain 4 is for example 6%～8% of tyre surface ground connection width TW.When such tire shoulder tap drain 3 and central tap drain 4 travel Shi road, effectively the moisture film between road surface and fetus face 2 is discharged, thereby improve wet road performance.
In addition, tyre surface ground connection width TW is the distance of the tire axial between tyre surface ground terminal Te, the Te of tire 1 of normal state.
The A-A cutaway view of Fig. 1 has been shown in Fig. 2.As shown in Figure 2, the ditch depth d1 of tire shoulder tap drain 3 and central tap drain 4 and d2 preference 5mm～10mm in this way.
As shown in Figure 1, fetus face 2 be divided into central land part 5 between a pair of central tap drain 4,4, the middle land part 6 in each side of tire equator C between tire shoulder tap drain 3 and central tap drain 4 and than tire shoulder tap drain 3,3 more by a pair of tire shoulder land part 7,7 in tire axial outside.
Middle land part 6 comprises that vehicle is configured in while installing than tire equator C and is more configured in than tire equator C more by land part 6B in the middle of the inner side of vehicle interior side when land part 6A and vehicle are installed in the middle of the outside of vehicle outside.
The enlarged drawing of land part 6A in the middle of outside has been shown in Fig. 3.As shown in Figure 3, in the middle of outside, land part 6A has roughly fixing width.In the middle of outside, the width W 3 of the tire axial of land part 6A is preferably shown in tyre surface ground terminal TW(Fig. 1 and Fig. 2, below same) 0.09 times～0.13 times.In the middle of such outside, land part 6A maintains wet road performance and brings into play excellent road-holding property.
In the middle of outside, land part 6A is provided with traverse furrow 20 in the middle of outside.In the middle of outside, traverse furrow 20 is communicated with between central tap drain 4 and tire shoulder tap drain 3.In the middle of outside, the ditch width W4 of traverse furrow 20 is 0.5mm～1.5mm.So middle traverse furrow 20Shi Shi road, outside performance improves, and the rigidity of the appropriateness alleviation middle land part 6A in outside, thereby improves comfort level by bus.
In the middle of outside, land part 6A is not provided with the ditch that ditch width is greater than 1.5mm.Thus, suppress the significantly reduction of the rigidity of the middle land part 6A in outside.Therefore, maintain higher turning stability.
When in the situation that in the middle of outside the land 6A of portion the ditch that ditch width is greater than 1.5mm is set, the rigidity of land part 6A can reduce in the middle of outside, thus the stability that makes to turn reduces.And, in the situation that the ditch width W4 of traverse furrow 20 is less than 0.5mm in the middle of outside, cannot expect to improve wet road performance.
In the middle of outside traverse furrow 20 comprise the first rake 21 of tilting with respect to tire axial, with contrary with the first rake towards the second rake 22 tilting and connect the connecting portion 23 between them.
The block diagram of land part 6A in the middle of outside has been shown at Fig. 4 (a) and (b).As shown in Figure 4, when in the middle of outside, land part 6A is non-loaded, traverse furrow 20 openings in the middle of outside.As mentioned above, in the middle of outside, the ditch width of traverse furrow 20 is 0.5mm～1.5mm, therefore as shown in Figure 4 (b), and when loading ground contact load, land part 6A in the middle of the power F1 that tire is circumferential and F2 act on, in the middle of outside, the ditch wall of traverse furrow 20 is mutually close to and is integral.Now, because traverse furrow 20 in the middle of outside comprises mutually the first rake 21 and the second rake 22 towards reversal dip, even if therefore the power F3 of tire axial and F4 act on outside in the middle of land part 6A be also difficult for deforming.That is, the middle land part 6A in outside suppresses the shear deformation of tire axial effectively.Therefore, more effectively maintain turning stability.
As shown in Figure 3, connecting portion 23 is preferably located at than the center 6c of the tire axial of land part 6A in the middle of outside and is more leaned on the position of tire axial inner side.Thus, owing to being loaded with larger ground contact load near connecting portion 23, therefore can further bring into play above-mentioned effect.
The connecting portion 23 of present embodiment is that the sharp-pointed kink by traverse furrow 20 in the middle of outside forms.Such connecting portion 23 can more effectively suppress the shear deformation of the middle land part 6A in outside when ditch wall contacts.Connecting portion 23 can be also circular-arc.
The distance L 1 along tire axial in the middle of connecting portion 23 and outside between the described center 6c of land part 6A, the more than 0.28 times of width W 3 of the tire axial of land part 6A in the middle of preferably, be more preferably more than 0.30 times, and be preferably below 0.36 times, more preferably below 0.34 times.Described distance L 1 when between the described center 6c of connecting portion 23 and the middle land part 6A in outside is less than in the situation of 0.28 times of the described width W 3 of land part 6A in the middle of outside, because connecting portion easy to wear 23 is positioned at tire axial outside, therefore likely can produce partial wear.On the contrary, when described distance L 1 is greater than in the situation of 0.36 times of the described width W 3 of land part 6A in the middle of outside, the first rake 21 increases, and likely cannot bring into play effect as described above.
The angle θ 2 with respect to tire axial of the first rake 21 is preferably more than 40 °, more preferably more than 45 °, and is preferably below 60 °, more preferably below 55 °.In the situation that the described angle θ 2 of the first rake 21 is less than 40 °, even if the ditch wall of traverse furrow 20 contacts the effect that also cannot obtain the distortion that suppresses tire axial in the middle of outside likely when loaded load.On the contrary, in the situation that the described angle θ 2 of the first rake 21 is greater than 60 °, likely near connecting portion 23, produce partial wear.
From the same viewpoint, the angle θ 3 with respect to tire axial of the second rake 22 is preferably more than 40 °, more preferably more than 45 °, and is preferably below 60 °, more preferably below 55 °.
The enlarged drawing of land part 6B in the middle of inner side has been shown in Fig. 5.As shown in Figure 5, in the middle of inner side, land part 6B has roughly fixing width W 5.
In order to maintain the rigidity of fetus face and the reduction of the road performance that suppresses to wet, the width W 5 of the tire axial of the middle land part 6B in inner side is the more than 0.11 times of tyre surface ground connection width TW preferably, be more preferably more than 0.13 times, and preferably below 0.17 times, preferred below 0.15 times.
In the middle of inner side, land part 6B is circumferentially alternately arranged at intervals with the middle traverse furrow 30 in inner side and the middle band ditch 31 in inner side along tire.
In the middle of inner side, traverse furrow 30 comprises thin-width part 32 and thick width portion 33.The ditch width W6 of thin-width part 32 is 0.5mm～1.5mm.Thin-width part 32 is communicated with tire shoulder tap drain 3.Thin-width part 32 tilts to extend with respect to tire axial.Thin-width part 32 is linearity.The drainage performance of such 32 pairs of tire shoulder tap drains 3 of thin-width part is assisted, thereby improves wet road performance.
In the situation that the ditch width W6 of thin-width part 32 is less than 0.5mm, likely cannot improve wet road performance.On the contrary, in the situation that the ditch width W6 of thin-width part 32 is greater than 1.5mm, likely in the middle of inner side, the rigidity of land part 6B reduces and the stability reduction that makes to turn.
Slightly width portion 33 has the ditch width thicker than thin-width part 32.The ditch width W7 of thick width portion 33 is greater than 1.2mm and below 4.0mm.Slightly width portion 33 is communicated in thin-width part 32 and central tap drain 4.Slightly width portion 33 tilts to extend with respect to tire axial.Slightly width portion 33 is linearity.Thick width portion 33 is like this applicable to the rigidity of land part 6B in the middle of inner side, thereby maintains turning stability.
More than the ditch width W7 of thick width portion 33 is preferably 1.7mm, more preferably more than 2.3mm, and be preferably below 3.5mm, more preferably below 3.0mm.When slightly the ditch width W7 of width portion 33 is less than 1.7mm, likely cannot improve wet road performance.On the contrary, in the situation that slightly the ditch width W7 of width portion 33 is greater than 3.5mm, the less rigid of land part 6B in the middle of inner side, the stability that likely makes to turn reduces.
In the middle of inner side, band ditch 31 is communicated with tire shoulder tap drain 3, and in the part 6B of land, forms end in the middle of inner side.In the middle of inner side, band ditch 31 extends along linearity.In the middle of inner side, band ditch 31 comprises the lateral sulcus portion 34 being communicated with tire shoulder tap drain 3 and the central sulcus portion 35 being communicated with the tire axial inner side of lateral sulcus portion 34.Lateral sulcus portion 34 has the ditch width that ditch width is larger than central sulcus portion 35.In the middle of inner side, band ditch 31 is alleviated the rigidity of land part 6B in the middle of inner side together with traverse furrow 30 in the middle of inner side, maintains turning stability, improves wet road performance and ride comfort energy.
As shown in Figure 1, tire shoulder land part 7 comprises tire shoulder land, the inner side part 7B that is configured in vehicle interior side when being configured in tire shoulder land, the outside part 7A of vehicle outside and vehicle when vehicle is installed installs.
The enlarged drawing of outside tire shoulder land part 7A has been shown in Fig. 6.As shown in Figure 6, outside tire shoulder land part 7A has roughly fixing width W 8.In order to make to turn, stability and ride comfort can and be deposited, the width W 8 of the tire axial of outside tire shoulder land part 7A, preferably the more than 0.18 times of tyre surface ground connection width TW, is more preferably more than 0.20 times, and be preferably below 0.24 times, more preferably below 0.22 times.
On tire shoulder land, outside, part 7A is provided with tire shoulder rill 40A.Tire shoulder rill 40A circumferentially extends continuously along tire.Thus, outside tire shoulder land part 7A is divided into the outside portion 41 in tire axial outside and the inside portion 42 of tire axial inner side.
Tire shoulder rill 40A has the ditch width less than tire shoulder tap drain 3.More than the ditch width W9 of tire shoulder rill 40A is preferably 0.5mm, more preferably more than 0.8mm, and be preferably below 1.5mm, more preferably below 1.2mm.Such tire shoulder rill 40A can not make the rigidity of outside tire shoulder land part 7A decline to a great extent.Therefore, make to turn stability Yu Shi road performance depositing.
From the same viewpoint, shown in ditch depth d3(Fig. 2 of tire shoulder rill 40A) be preferably 3.0mm more than, more preferably more than 3.5mm, and be preferably below 4.5mm, more preferably below 4.0mm.
The outside portion 41 of outside tire shoulder land part 7A has roughly fixing width.Outside portion 41 at tire shoulder land, outside part 7A is circumferentially alternately provided with the first band ditch 43 and the second band ditch 44 along tire.The first band ditch 43 extends to tire shoulder rill 40A from the outside of tyre surface ground terminal Te.The second band ditch 44 is from the outside extension of tyre surface ground terminal Te and at the interior formation end in described outside portion 41.Thus, improve wet road performance and partially sail performance.
The first band ditch 43 and the second band ditch 44 are preferably towards tire axial outside and ditch width reduces gradually.The first band ditch 43 like this and the second band ditch 44 make the rigidity of outside tire shoulder land part 7A increase gradually towards tire axial outside.Therefore, when turning outside tire shoulder land part 7A effect while having large load, the increase of the ground contact area of tire shoulder land, outside part 7A becomes mild.Turning stability while therefore especially improving sharply turning.
The inside portion 42 of outside tire shoulder land part 7A is the ribs that circumferentially extend continuously along tire.Ditch is not set completely in the described inside portion 42 of present embodiment.The circumferential rigidity of tire of outside tire shoulder land part 7A is improved in such inside portion 42, and the stability that makes to turn improves.
The width W 10 of the tire axial of described inside portion 42 is the more than 0.25 times of width W 8 of tire axial of outside tire shoulder land part 7A preferably, is more preferably more than 0.28 times, and preferably below 0.35 times, is more preferably below 0.32 times.Described inside portion 42 like this increases the rigidity of outside tire shoulder land part 7A.Therefore improve turning stability and ride comfort energy.
The enlarged drawing of inner side tire shoulder land part 7B has been shown in Fig. 7.As shown in Figure 7, inner side tire shoulder land part 7B has roughly fixing width W 11.In order to make to turn, stability and ride comfort can and be deposited, the width W 11 of the tire axial of inner side tire shoulder land part 7B is the more than 0.16 times of tyre surface ground connection width TW preferably, be more preferably more than 0.18 times, and preferably below 0.24 times, be more preferably below 0.22 times.
On tire shoulder land, inner side, part 7B is provided with tire shoulder rill 40B.Tire shoulder rill 40B circumferentially extends continuously along tire.Thus, inner side tire shoulder land part 7B is divided into and in tire axial outside, has the outside portion 51 of roughly fixing width and the inside portion 52 of tire axial inner side.
The tire shoulder rill 40B that is located at inner side tire shoulder land part 7B adopt be located at outside shown in tire shoulder rill 40A(Fig. 1 and Fig. 6 of tire shoulder land part 7A) identical ditch width and ditch depth.
The inside portion 52 of inner side tire shoulder land part 7B has roughly fixing width W 12.Inside portion 52 forms lengthwise pattern block 56 along the pattern block row of tire circumferential array by inner side tire shoulder traverse furrow 53.
The width W 12 of the tire axial of the inside portion 52 of inner side tire shoulder land part 7B is the more than 0.20 times of width W 11 of the tire axial of inner side tire shoulder land part 7B preferably, be more preferably more than 0.22 times, and preferably, below 0.26 times, be more preferably below 0.24 times.Thus, the rigidity of inner side tire shoulder land part 7B is improved in so described inside portion 52, and turning performance is improved.
The circumferential length L 2 of the tire of lengthwise pattern block 56 is the more than 6.0 times of width W 12 of the tire axial of described inside portion 52 preferably, are more preferably more than 6.5 times, and preferably below 8.0 times, are more preferably below 7.5 times.Such lengthwise pattern block 56 improves the circumferential rigidity of tire and can be out of shape along tire axial appropriateness.Therefore, maintain turning stability and improve ride comfort energy.
At tire shoulder land, inner side part 7B, along tire, be circumferentially arranged at intervals with the inner side tire shoulder traverse furrow 53 extending along tire axial from the outside of tyre surface ground terminal Te.
Inner side tire shoulder traverse furrow 53 comprises the second inner side tire shoulder traverse furrow 53B of inner the first inner side tire shoulder traverse furrow 53A being communicated with tire shoulder tap drain 3 and the inner 52 interior formation ends in inside portion.The first inner side tire shoulder traverse furrow 53A and the second inner side tire shoulder traverse furrow 53B are circumferentially arranged alternately along wheel.Thus, improve wet road performance and partially sail performance.
Inner side tire shoulder traverse furrow 53 comprises the first ditch portion 54 of extending along tire axial and the second ditch portion 55 being connected in the tire axial inner side of the first ditch portion 54, tilt with the angle larger than the first ditch portion 54 with respect to tire axial.
The first ditch portion 54 and tire axial almost parallel of inner side tire shoulder traverse furrow 53.Described the first ditch portion 54 is linearity.The described first ditch portion 54 of present embodiment is towards tire axial outside and ditch width reduces gradually.Turning stability while thus, improving sharply turning.
The second ditch portion 55 of inner side tire shoulder traverse furrow 53 extends along linearity with the ditch width of fixing.The second ditch portion 55 is communicated with tire shoulder rill 40B.The second ditch portion 55 tilts with respect to tire axial.The second ditch portion 55 like this compares with the ditch extending abreast along tire axial and can make the circumferential rigidity of tire of land part improve.Therefore, the second ditch portion 55 increases the rigidity of the tire axial inner side of inner side tire shoulder land part 7B relatively, and the stability that makes to turn improves.
The angle θ 4 with respect to tire axial of the second ditch portion 55 is preferably large than the angle with respect to tire axial of the first ditch portion 54.The described angle θ 4 of the second ditch portion 55 is preferably more than 40 °, more preferably more than 45 °, and is preferably below 60 °, is more preferably below 55 °.The second ditch portion 55 of such inner side tire shoulder traverse furrow 53 makes the circumferential rigidity of the tire of inner side tire shoulder land part 7B suitable, and make to turn stability and ride comfort can and be deposited.
The enlarged drawing of central land part 5 has been shown in Fig. 8.As shown in Figure 8, the center running lug 61 that central land part 5 is divided by central traverse furrow 60 is listed as along the pattern block of tire circumferential array.
Central authorities' land part 5 has roughly fixing width.The width W 13 of the tire axial of central authorities' land part 5 is the more than 0.08 times of tyre surface ground connection width TW preferably, is more preferably more than 0.10 times, and preferably below 0.16 times, is more preferably below 0.14 times.Thus, make the rigidity of central land part 5 become suitable, thereby improve ride comfort energy.
In central land part 5, in the mode replacing, be arranged at intervals with central traverse furrow 60 and central band ditch 62.
Central authorities' traverse furrow 60 is communicated in the central tap drain 4A in outside and the tap drain 4B of inner side central authorities.Central authorities' traverse furrow 60 extends with roughly fixing ditch width.Central authorities' traverse furrow 60 tilts with respect to tire axial.Central traverse furrow 60 so circumferentially and is axially brought into play edge effect at tire, and wet road performance is improved.
Central authorities' band ditch 62 is communicated with the tap drain 4B of inner side central authorities.Central authorities' band ditch 62 is preferably at the central band ditch 62 of central land part 5 interior formation ends.The rigidity of the inner side of the tire axial of the central band ditch 62 central land of alleviation parts 5 like this, improves wet road performance, and improves ride comfort energy.
The amplification view of inner side tire shoulder tap drain 3B has been shown in Fig. 9 (a), the amplification view of outside tire shoulder tap drain 3A has been shown in Fig. 9 (b).As shown in Fig. 9 (a) and Fig. 9 (b), ditch wall 10A, the 10B in the tire axial outside of outside tire shoulder tap drain 3A and inner side tire shoulder tap drain 3B, preferably with respect to the furrow rim 11 in the tire axial outside through tire shoulder tap drain 3 and perpendicular to the normal 12 of the tread 2s of fetus face 2, the angle θ 1 with 16 °～20 ° tilts.Such outside tire shoulder tap drain 3A and inner side tire shoulder tap drain 3B are discharged to the moisture film by ditch tire axial outside effectively, thereby improve wet road performance.
As shown in Figure 9 (b), the ditch wall 13 of the tire axial of outside tire shoulder tap drain 3A inner side comprises: the steeply inclined face 15 extending with linearity towards tire radial outside from the ditch bottom 14 of outside tire shoulder tap drain 3A; And the gently sloping surface portion 16 of gently tilting than this steeply inclined face 15.Such outside tire shoulder tap drain 3A increases ditch volume and makes wet road performance increase.
The circular-arc curved surface in tire outside with center is preferably caved in in gently sloping surface portion 16.Wet road performance improves in such gently sloping surface portion 16, and improves the horsestone performance of outside tire shoulder tap drain 3A.
As shown in Figure 1, in the middle of preferred central traverse furrow 60, inner side, in the middle of traverse furrow 30 and outside, the second rake 22 of traverse furrow 20 is located on same line.Thus, when Shi travels on road, make the moisture film between fetus face and road surface more effectively be discharged to tire axial outside.Therefore, improve wet road performance.
Above, air-inflation tyre of the present invention is had been described in detail, but the present invention is not limited to above-mentioned concrete embodiment, it can change to variety of way and implement.
Embodiment
Specification based on table 1 is of a size of the air-inflation tyre of 215/60R17 and manufactures experimently to having the motif of Fig. 1, Bing Duishi road performance, turning stability and ride comfort can be tested.Common-use size and the test method of each tire are as follows.
Wheel rim: 17 * 6.5J is installed
Inner pressure of tire: 240kPa
Test vehicle: four-wheel drive vehicle, free air capacity 2400cc
Tire installation site: entirely take turns
The < road performance > that wets
Make above-mentioned test vehicle with speed stage increase and enter following test route, measure the transverse acceleration (horizontal G) of the front-wheel of this test vehicle, calculate the average horizontal G of the front-wheel under the speed of 55Km/h～80Km/h.Result be take the exponential representation that embodiment 1 is 100.The wet road of the larger expression of numerical value performance is better.
Test route: the loop turn that radius is 100m
Road surface: depth of water 6mm is set on asphalt coating, the puddle of length 6m
< turning stability, ride comfort energy >
Turning stability and ride comfort when above-mentioned test vehicle is gone in ring on the test route of asphalt coating with the sense organ of chaufeur can be evaluated.Result is to take the expression of punctuating and annotating that embodiment 1 is 100, and numerical value larger expression turning stability or ride comfort can be better.
Test the results are shown in table 1.
Table 1
The wet road performance of stability in the time of can confirming that from the result of test the air-inflation tyre of embodiment maintains turning and raising and ride comfort energy.
Claims (8)
1. an air-inflation tyre, by the central tap drain that is arranged on the distolateral a pair of tire shoulder tap drain circumferentially extending continuously along tire of ground connection of the both sides of tire equator and tyre surface at fetus face and circumferentially extends continuously along tire between described a pair of tire shoulder tap drain, come the both sides in tire equator, and land part in the middle of marking off between described tire shoulder tap drain and described central tap drain, and this airtyred installation direction towards vehicle is appointed
Described airtyred being characterised in that,
When land part is included in vehicle installation in the middle of described, be configured in middle land, the outside part by vehicle outside than tire equator,
In the middle of described outside, land part is provided with centre, outside that be communicated with and that ditch width is 0.5mm～1.5mm traverse furrow between described central tap drain and described tire shoulder tap drain, and is not provided with the ditch that ditch width is greater than 1.5mm,
In the middle of described outside, traverse furrow comprises with respect to the first rake of tire axial inclination and with second rake towards inclination contrary with described the first rake.
2. air-inflation tyre according to claim 1, is characterized in that,
When land part is included in vehicle installation in the middle of described, be configured in middle land, the inner side part by vehicle interior side than tire equator,
In the middle of described inner side land part be provided with many that will between described central tap drain and described tire shoulder tap drain, be communicated with up inside centre traverse furrow,
In the middle of described inner side, traverse furrow comprises that ditch width is that the thin-width part of 0.5mm～1.5mm and ditch width are greater than 1.5mm and the thick width portion below 4.0mm.
3. air-inflation tyre according to claim 2, is characterized in that,
Described thin-width part is communicated with described tire shoulder tap drain,
Described thick width portion is communicated with described central tap drain.
4. according to the air-inflation tyre described in any one in claims 1 to 3, it is characterized in that,
Described tire shoulder tap drain is included in the outside tire shoulder tap drain that is configured in tire axial outside when vehicle is installed,
In the tire radial cross section that comprises tire rotation axle,
The furrow bank face of the tire axial inner side of described outside tire shoulder tap drain comprises: the steeply inclined face extending towards tire radial outside from the ditch bottom of described outside tire shoulder tap drain; And the gently sloping surface portion of gently tilting than this greatly sloped side.
5. air-inflation tyre according to claim 4, is characterized in that,
The circular-arc curved surface in tire outside with center is caved in in described gently sloping surface portion.
6. according to the air-inflation tyre described in any one in claim 1 to 5, it is characterized in that,
Described fetus face more has tire shoulder land part by the position in tire axial outside than described tire shoulder tap drain,
Described tire shoulder land part comprises that vehicle is configured in tire shoulder land, the outside part of vehicle outside while installing,
Tire shoulder land, described outside part, by ditch width, than described tire shoulder tap drain, tire shoulder rill little and that circumferentially extend continuously along tire is divided into, the inside portion of the outside portion in tire axial outside and tire axial inner side,
Described inside portion is the rib circumferentially extending continuously along tire.
7. according to the air-inflation tyre described in any one in claim 1 to 6, it is characterized in that,
In the tire radial cross section that comprises tire rotation axle,
The ditch wall in the tire axial outside of described tire shoulder tap drain, with respect to the furrow rim in the tire axial outside through described tire shoulder tap drain and perpendicular to the normal of the tread of described fetus face, tilts with the angle of 16o～20o.
8. according to the air-inflation tyre described in any one in claim 1 to 7, it is characterized in that,
In the middle of described outside, traverse furrow comprises the connecting portion between described the first rake and described the second rake,
Described connecting portion is located at the position by tire axial inner side than the center of the tire axial of land part in the middle of described outside.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2013087706A JP5894556B2 (en) | 2013-04-18 | 2013-04-18 | Pneumatic tire |
| JP2013-087706 | 2013-04-18 |
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| CN104108289A true CN104108289A (en) | 2014-10-22 |
| CN104108289B CN104108289B (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410085555.0A Active CN104108289B (en) | 2013-04-18 | 2014-03-10 | Pneumatic tire |
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| JP (1) | JP5894556B2 (en) |
| CN (1) | CN104108289B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105818614A (en) * | 2015-01-26 | 2016-08-03 | 住友橡胶工业株式会社 | Pneumatic tyre |
| CN107206847A (en) * | 2015-01-30 | 2017-09-26 | 株式会社普利司通 | Pneumatic tire |
| CN108382134A (en) * | 2017-01-18 | 2018-08-10 | 住友橡胶工业株式会社 | Tire |
| CN108621703A (en) * | 2017-03-21 | 2018-10-09 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN109968914A (en) * | 2017-11-27 | 2019-07-05 | 住友橡胶工业株式会社 | Tire |
| CN111070975A (en) * | 2018-10-22 | 2020-04-28 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN113997733A (en) * | 2021-11-05 | 2022-02-01 | 赛轮集团股份有限公司 | Tire tread |
| US20220126630A1 (en) * | 2020-10-26 | 2022-04-28 | Sumitomo Rubber Industries, Ltd. | Tire |
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| CN105818614A (en) * | 2015-01-26 | 2016-08-03 | 住友橡胶工业株式会社 | Pneumatic tyre |
| CN105818614B (en) * | 2015-01-26 | 2019-01-18 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN107206847B (en) * | 2015-01-30 | 2019-08-27 | 株式会社普利司通 | Pneumatic tire |
| CN107206847A (en) * | 2015-01-30 | 2017-09-26 | 株式会社普利司通 | Pneumatic tire |
| US10688830B2 (en) | 2015-01-30 | 2020-06-23 | Bridgestone Corporation | Pneumatic tire |
| CN108382134A (en) * | 2017-01-18 | 2018-08-10 | 住友橡胶工业株式会社 | Tire |
| CN108621703A (en) * | 2017-03-21 | 2018-10-09 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN109968914A (en) * | 2017-11-27 | 2019-07-05 | 住友橡胶工业株式会社 | Tire |
| CN109968914B (en) * | 2017-11-27 | 2022-06-24 | 住友橡胶工业株式会社 | Tyre for vehicle wheels |
| CN111070975A (en) * | 2018-10-22 | 2020-04-28 | 通伊欧轮胎株式会社 | Pneumatic tire |
| US20220126630A1 (en) * | 2020-10-26 | 2022-04-28 | Sumitomo Rubber Industries, Ltd. | Tire |
| US11820174B2 (en) * | 2020-10-26 | 2023-11-21 | Sumitomo Rubber Industries, Ltd. | Tire |
| CN113997733A (en) * | 2021-11-05 | 2022-02-01 | 赛轮集团股份有限公司 | Tire tread |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5894556B2 (en) | 2016-03-30 |
| JP2014210499A (en) | 2014-11-13 |
| CN104108289B (en) | 2017-06-16 |
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