CN103895453A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN103895453A CN103895453A CN201310337017.1A CN201310337017A CN103895453A CN 103895453 A CN103895453 A CN 103895453A CN 201310337017 A CN201310337017 A CN 201310337017A CN 103895453 A CN103895453 A CN 103895453A
- Authority
- CN
- China
- Prior art keywords
- tire
- mentioned
- traverse furrow
- tap drain
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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 present invention relates to a pneumatic tire which evenly increases draining performance and anti-wear performance. On the tire tread (2) is provided with: a central main channel (3A), an intermediate principal sulcus (3B), a tire shoulder main channel (3C), a central groove crossing channel (4A), an intermediate transverse groove (4B) and a tire shoulder transverse groove (4C). The intermediate transverse groove (4B) and the tire shoulder transverse groove (4C) are approximately in linear extension and their channel widths range between 4 -16.0mm. At the bottoms of the intermediate transverse groove (4B) and the tire shoulder transverse groove (4C) are provided reinforced steel the depth of which is no less than 50% (T). After the central block (5), the central region of the ends of the (5A) land ratio after the middle block (6) at both ends of the middle region (6A) of the land is 1.05 -1.25 times. The central groove crossing channel (4A) with respect to the tire axial angle has an angle 15 -45 degrees which is larger than that of the middle transverse groove (4B) with respect to the tire axial angle.
Description
Technical field
The present invention relates to balancedly improve the air-inflation tyre of drainage performance and abrasion resistance properties.
Background technology
There is following air-inflation tyre in the past, that is: marked off multiple pattern blocks at fetus face by many tap drains that circumferentially extend along tire and many traverse furrows that extend along tire axial.In recent years, to improve so airtyred abrasion resistance properties as object, and in traverse furrow, be provided with from the lacing wire of the darkest bottom of trench protuberance of this traverse furrow.In the time of tire rolling, the tire that lacing wire suppresses pattern block circumferentially moves, thereby the slippage that pattern block is produced reduces.
But air-inflation tyre as described above can reduce because of lacing wire the ditch volume of traverse furrow, thereby makes drainage performance variation.And, if the wearing and tearing of pattern block further develop, because traverse furrow is interrupted, therefore especially there is the problem of drainage performance variation latter stage in wearing and tearing.There is following patent documentation 1 as correlation technique.
Patent documentation 1: TOHKEMY 2011-230643 communique
Summary of the invention
The present invention makes in view of actual conditions as described above, main purpose is to provide a kind of air-inflation tyre, this air-inflation tyre improves the land ratio of middle section of fetus face and the ratio of the land ratio of zone line, and then improve the shape of central traverse furrow, middle traverse furrow and tire shoulder traverse furrow, as substantially, balancedly improve drainage performance and abrasion resistance properties.
The invention that in the present invention, technical scheme 1 is recorded is a kind of air-inflation tyre, by fetus face setting: 1 the central tap drain circumferentially extending continuously along tire in tire equator, the a pair of middle tap drain circumferentially extending continuously along tire in the tire axial both sides of this central authorities' tap drain, the a pair of tire shoulder tap drain circumferentially extending continuously along tire between above-mentioned middle tap drain and ground terminal, connect many central traverse furrows between above-mentioned central tap drain and above-mentioned middle tap drain, connect many middle traverse furrows between above-mentioned middle tap drain and above-mentioned tire shoulder tap drain, and connect many tire shoulder traverse furrows between above-mentioned tire shoulder tap drain and above-mentioned ground terminal, have thus: the center running lug of being divided by above-mentioned central tap drain, above-mentioned middle tap drain and above-mentioned central traverse furrow is arranged to a pair of center running lug forming along the circumferential interval of tire and be listed as, pattern block in the middle of form a pair of being set by the middle pattern block that in the middle of above-mentioned, tap drain, above-mentioned tire shoulder tap drain and above-mentioned middle traverse furrow are divided along the circumferential interval of tire is listed as, and will be by above-mentioned tire shoulder tap drain, the pattern block on tire shoulder that above-mentioned ground terminal and above-mentioned tire shoulder traverse furrow are divided arranges a pair of pattern block on tire shoulder row that form along the circumferential interval of tire, this airtyred being characterised in that, in the middle of above-mentioned traverse furrow and above-mentioned tire shoulder traverse furrow taking linearity roughly extend and ditch width as 4.0mm～16.0mm, at the bottom of trench of above-mentioned middle traverse furrow and above-mentioned tire shoulder traverse furrow, more than 50% lacing wire of the darkest trench depth that not arrange from the height of the darkest bottom of trench protuberance be above-mentioned each traverse furrow, through the region between the tire circumferential line at the tire axial two ends of above-mentioned center running lug that is the land ratio of middle section be: through 1.05 times～1.25 times of the land ratio of the region between the tire circumferential line at the tire axial two ends of pattern block in the middle of above-mentioned that is zone line, above-mentioned central traverse furrow is 15 °～45 ° with respect to the angle of tire axial and is greater than the angle of above-mentioned middle traverse furrow with respect to tire axial.
In addition, the invention described in technical scheme 2 is on the airtyred basis described in technical scheme 1, disposes the tread-rubber that forms outer surface of tire at above-mentioned fetus face, and the complex modulus of elasticity E* of above-mentioned tread-rubber is 6.3MPa～7.7MPa.
In addition, invention described in technical scheme 3 is on the airtyred basis described in technical scheme 1 or 2, above-mentioned central tap drain along tire circumferentially extend with linearity and its ditch width be less than above-mentioned in the middle of the ditch width of tap drain, above-mentioned in the middle of tap drain and above-mentioned tire shoulder tap drain along tire circumferentially extend with zig-zag and the amplitude of oscillation of each ditch line of centers more than 2mm.
In addition, invention described in technical scheme 4 is in technical scheme 1 to 3 on the airtyred basis described in any one, above-mentioned central traverse furrow comprises: be configured in tire equator a side the first central traverse furrow and be configured in the second central traverse furrow of the opposite side of tire equator, above-mentioned the first central traverse furrow and above-mentioned the second central traverse furrow, arrange along the circumferential interval of tire with identical spacing, and tire week upwards staggering half pitch phase place and configuring.
In addition, in technical scheme 1 to 4 on the airtyred basis described in any one in the invention of technical scheme 5, traverse furrow and the above-mentioned central traverse furrow adjacent with this centre traverse furrow in the middle of above-mentioned, arrange along the circumferential interval of tire with identical spacing, and tire week upwards staggering half pitch phase place and configuring.
In addition, in technical scheme 1 to 5 on the airtyred basis described in any one in the invention of technical scheme 6, above-mentioned central traverse furrow comprises: the medial sulcus portion that extend with linearity in outside from above-mentioned central tap drain to tire axial and the lateral sulcus portion of extending to tire equator side with linearity from tap drain in the middle of above-mentioned, above-mentioned medial sulcus portion and above-mentioned lateral sulcus portion are in upwards staggered positions of tire week.
In addition, in technical scheme 1 to 6 on the airtyred basis described in any one in the invention of technical scheme 7, above-mentioned fetus face has the directivity decorative pattern of having specified hand of rotation, and above-mentioned central traverse furrow lands and rolls tiltedly after the tire rotation direction of tire axial lateral.
Air-inflation tyre of the present invention, fetus face has: the center running lug of being divided by central tap drain, middle tap drain and central traverse furrow is arranged to a pair of center running lug forming along the circumferential interval of tire and be listed as; In the middle of the middle pattern block of being divided by middle tap drain, tire shoulder tap drain and middle traverse furrow is arranged to form a pair of along the circumferential interval of tire, pattern block is listed as; And be listed as a pair of pattern block on tire shoulder forming being set by the pattern block on tire shoulder of tire shoulder tap drain, ground terminal and the division of tire shoulder traverse furrow along the circumferential interval of tire.
Middle traverse furrow and tire shoulder traverse furrow taking linearity roughly extend and ditch width as 4.0～16.0mm.Middle traverse furrow like this and the resistance of water drainage of tire shoulder traverse furrow are little.Therefore improve drainage performance.And in the middle of guaranteeing, the rigidity of pattern block and pattern block on tire shoulder is high.Therefore improve abrasion resistance properties.In more than 50% lacing wire of the bottom of trench of middle traverse furrow and the tire shoulder traverse furrow the darkest trench depth that not arrange from the height of the darkest bottom of trench protuberance be each traverse furrow.Even if also can guarantee thus the ditch volume of middle traverse furrow and tire shoulder traverse furrow latter stage in wearing and tearing.Therefore further improve drainage performance.
Through the region between the tire circumferential line at the two ends of the tire axial of center running lug that is the land ratio of middle section be, through 1.05～1.25 times of the land ratio of the region between the tire circumferential line at the two ends of the tire axial of middle pattern block that is zone line.Guarantee that thus the rigidity of center running lug is higher than the rigidity of middle pattern block, thereby can make to travel time, effect there are the center running lug of large load and effect to have the earth contact pressure producing on the middle pattern block of the load less than center running lug even.Therefore balancedly reduce the slippage because of the caused center running lug of tire rolling and middle pattern block, thereby improve abrasion resistance properties.
Central authorities' traverse furrow is 15～45 ° with respect to the angle of tire axial.When the ora terminalis of the side that first lands of center running lug can disperse and relax ground connection thus from the impact on road surface.Therefore make the slippage of center running lug reduce.In addition, central traverse furrow is greater than the angle of middle traverse furrow with respect to tire axial with respect to the angle of tire axial.Thus center running lug first land the ora terminalis of side and middle pattern block first land the ora terminalis of side can balancedly relax ground connection time from the impact on road surface.Therefore make the slippage of center running lug and middle pattern block even, thereby further improve abrasion resistance properties.Therefore air-inflation tyre of the present invention balancedly improves drainage performance and abrasion resistance properties.
Brief description of the drawings
Fig. 1 is the expansion drawing that represents the fetus face of an embodiment of the invention.
Fig. 2 is the X-X cutaway 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 expansion drawing of the fetus face of other embodiments.
Fig. 6 is the expansion drawing of the fetus face of another embodiment.
Description of reference numerals: 3A ... central authorities' tap drain; 3B ... middle tap drain; 3C ... tire shoulder tap drain; 4A ... central authorities' traverse furrow; 4B ... middle traverse furrow; 4C ... tire shoulder traverse furrow; 5 ... center running lug; 5A ... middle section; 6 ... middle pattern block; 6A ... zone line; R ... hand of rotation.
Detailed description of the invention
Below, based on brief description of the drawings an embodiment of the invention.
As shown in Figure 1, the air-inflation tyre of present embodiment is for example suitable as the heavy duty pneumatic vehicle tire that truck, passenger vehicle are used, and it has the non-symmetrical tread contour of the hand of rotation R that has specified tire.The hand of rotation R of tire for example represents in sidewall portion (not shown) with word etc.
Thus, fetus face 2 disposes: the center running lug 5 of being divided by central tap drain 3A, middle tap drain 3B and central traverse furrow 4A is arranged to a pair of center running lug row 5R forming along the circumferential interval of tire; The middle pattern block 6 of being divided by middle tap drain 3B, tire shoulder tap drain 3C and middle traverse furrow 4B is arranged to a pair of middle pattern block row 6R forming along the circumferential interval of tire; And the pattern block on tire shoulder 7 of being divided by tire shoulder tap drain 3C, ground terminal Te and tire shoulder traverse furrow 4C is arranged to a pair of pattern block on tire shoulder row 7R forming along the circumferential interval of tire.
Wherein, " ground terminal " Te is defined as: wheel rim is assembled into regular wheel rim, has filled the tire of regular interior pressure and uncharged normal state, the outermost earthing position of tire axial when loading regular load and being grounded on plane with the camber angle of 0 degree.And under normal state, the distance of the tire axial between this ground terminal Te, Te is defined as tyre surface ground connection width TW.In addition, the size of the each portion of tire etc. are the value under above-mentioned normal state in the situation that of specified otherwise not.
In addition, above-mentioned " regular wheel rim " refers in the schematism including the specification of tire institute foundation, specify the wheel rim of this specification according to each tire, for example, if JATMA represents " standard rim ", if TRA represents " Design Rim ", if ETRTO represents " Measuring Rim ".
In addition, above-mentioned " regular interior pressure " is in the schematism including the specification of tire institute foundation, specify the air pressure of each specification according to each tire, if JATMA represents " anticyclonic pressure ", if TRA represents the maxim that " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " records, if ETRTO represents " INFLATION PRESSURE ", but the situation that is passenger car tire at tire is next for 180kPa.
In addition, " regular load " refers to, in the schematism including the specification of tire institute foundation, specifies the load of each specification according to each tire, if JATMA, be " maximum load capability ", if TRA, the maxim of recording for table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO, be " LOAD CAPACITY ", in the situation that tire is passenger car tire, for being equivalent to 88% load of above-mentioned load.
As shown in Figure 2, dispose at fetus face 2 the tread-rubber 2G that forms outer surface of tire 2a.The complex modulus of elasticity E* of such tread-rubber 2G is preferably 6.3～7.7MPa.That is, be less than 6.3MPa at the complex modulus of elasticity E* of tread-rubber 2G, the slippage of the pattern block 5 to 7 when tire rolling increases, thereby increases abrasion loss.In addition, likely in pattern block 5 to 7 generation heel toe wearing and tearing.Complex modulus of elasticity E* at tread-rubber 2G exceedes 7.7MPa, easily produce " crack " at the bottom of trench of each tap drain 3A to 3C, each traverse furrow 4A to 4C, thereby likely make the Groove of resistance to TGC(Tread Cracking: tread void crack) degradation.Therefore the complex modulus of elasticity E* of tread-rubber 2G is more preferably more than 6.5MPa, in addition more preferably below 7.5MPa.
As shown in Figure 3, the central tap drain 3A of present embodiment for example circumferentially extends with linearity along tire.Central tap drain 3A like this can discharge the water in ditch to the rear of tire rotation direction swimmingly, and guarantees to travel that time effect has the circumferential rigidity of the tire of center running lug 5 of large load high, thereby improves abrasion resistance properties, resistance to partial wear performance.
The ditch line of centers 10 that comprises the middle tap drain 3B of ditch line of centers 10a, 10b is alternately connected intermediate point s1 and obtains with intermediate point s2, wherein intermediate point s1 be in the middle of tap drain 3B tire axial inner side inner side costa colpi 10x tire axial inner side some a1, with the intermediate point of the some a2 of inner side of the tire axial of the outside costa colpi 10y in the tire axial outside of middle tap drain 3B, intermediate point s2 is outermost some a3 of tire axial of inner side costa colpi 10x, intermediate point with the outermost some a4 of tire axial of outside costa colpi 10y.
More than the amplitude of oscillation λ 1 of the ditch line of centers 10 of middle tap drain 3B is preferably 2mm, more preferably more than 4mm.That is, if the amplitude of oscillation λ 1 of middle tap drain 3B is less than 2mm, the drainage performance variation while likely making turning driving.In addition, if the amplitude of oscillation λ 1 of middle tap drain 3B exceedes 8mm, the resistance of water drainage while travelling increases, thereby likely makes drainage performance variation.Therefore in the middle of, the amplitude of oscillation λ 1 of tap drain 3B is preferably below 8mm, more preferably below 6mm.In this manual, the amplitude of oscillation λ 1 of the ditch line of centers 10 of middle tap drain 3B is distances of the tire axial of intermediate point s1 and intermediate point s2.
Tire shoulder tap drain 3C for example circumferentially extends with zig-zag along tire.The tire shoulder tap drain 3C of present embodiment alternately configures tire shoulder long leg 12A and tire shoulder short leg 12B.Tire shoulder long leg 12A has the side that lands after tire rotation direction and rolls oblique ditch line of centers 13a from ground terminal Te side direction tire equator C.Tire shoulder short leg 12B has the side that lands after tire rotation direction and rolls oblique ditch line of centers 13b from tire equator C side direction ground terminal Te.The direction of tilt of tire shoulder long leg 12A and tire shoulder short leg 12B also can be distinguished on the contrary.
Comprise the ditch line of centers 13 of the tire shoulder tap drain 3C of ditch line of centers 13a, 13b, intermediate point s3 is alternately connected with intermediate point s4 and obtains, wherein intermediate point s3 be the tire axial inner side of tire shoulder tap drain 3C inner side costa colpi 13x tire axial inner side some a5, with the intermediate point of the some a6 of inner side of the tire axial of the outside costa colpi 13y in the tire axial outside of tire shoulder tap drain 3C, intermediate point s4 is outermost some a7 of tire axial of inner side costa colpi 13x, intermediate point with the outermost some a8 of tire axial of outside costa colpi 13y.
According to the reason same with the amplitude of oscillation λ 1 of the ditch line of centers 10 of middle tap drain 3B, more than the amplitude of oscillation λ 2 of the ditch line of centers 13 of tire shoulder tap drain 3C is preferably 2mm, more preferably more than 4mm, be preferably in addition below 8mm, more preferably below 6mm.The distance of the amplitude of oscillation λ 2 use intermediate point s3 of the ditch line of centers 13 of tire shoulder tap drain 3C and the tire axial of intermediate point s4 defines.
As shown in Figure 2, the ditch width W1 of central tap drain 3A is less than the ditch width W2 of middle tap drain 3B.Thus, reducing effect has near the earth contact pressure of costa colpi of the central tap drain 3A of the center running lug 5 of large load, thereby improves abrasion resistance properties.
In order balancedly to improve above-mentioned effect and drainage performance, the ditch width that the ditch width W1(of the tap drain 3A of central authorities and the length direction of ditch are rectangular, below for other tap drains 3B, 3C too) be preferably the more than 0.8% of tyre surface ground connection width TW, more preferably more than 1.2%, be preferably in addition below 2.4%, more preferably below 2.0%.Equally, the ditch width W2 of middle tap drain 3B is preferably the more than 1.5% of tyre surface ground connection width TW, more preferably more than 1.0%, is preferably in addition below 4.5%, more preferably below 4.0%.And the ditch width W3 of tire shoulder tap drain 3C is preferably the more than 1.0% of tyre surface ground connection width TW, more preferably more than 1.5%, be preferably in addition below 4.0%, more preferably below 3.5%.
According to improving drainage performance and guaranteeing the viewpoint of the rigidity of each pattern block 5 to 7, the trench depth D1 to D3 of each tap drain 3A to 3C is preferably for example 15～25mm.
As shown in Figure 1, central tap drain 3A is arranged on tire equator C.Tire axial distance L 2 between middle tap drain 3B and tire equator C is preferably 12～22% of tyre surface ground connection width TW.Tire axial distance L 3 between tire shoulder tap drain 3C and tire equator C is preferably 28～33% of tyre surface ground connection width TW.Balancedly guarantee thus 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 discharged swimmingly.Each position of each tap drain 3A to 3C is determined by their ditch line of centers.In addition as in the present embodiment, in as jagged non-directional middle tap drain 3B and tire shoulder tap drain 3C, the amplitude of oscillation line of centers G2 of the ditch line of centers 13 of amplitude of oscillation line of centers G1, the tire shoulder tap drain 3C of the ditch line of centers 10 of tap drain 3B in the middle of adopting.
The traverse furrow 4A of central authorities lands towards ground terminal Te side direction tire hand of rotation from tire equator C side and rolls tiltedly.Central traverse furrow 4A like this can utilize the rolling of tire, and the water in ditch is discharged to ground terminal Te side swimmingly from tire equator C side.
As shown in Figure 3, central traverse furrow 4A is 15～45 ° with respect to the angle θ 1 of tire axial.That is, being less than 15 ° at the angle θ 1 of central traverse furrow 4A, in ora terminalis 5x(Fig. 3 of the side that first lands of center running lug 5, is the ora terminalis of the downside of center running lug 5) circumferentially disperse along tire from the impact on road surface cannot be by ground connection time.Therefore the slippage of center running lug 5 increases, and makes abrasion resistance properties, the degradation of resistance to partial wear.And the drainage performance variation while making to travel.Exceed 45 ° at the angle θ 1 of central traverse furrow 4A, the rigidity of the tire axial of center running lug 5 reduces, thereby makes abrasion resistance properties, the degradation of resistance to partial wear.Drainage performance variation while making turning driving.Therefore the angle θ 1 of central traverse furrow 4A is preferably more than 20 °, is preferably in addition below 40 °.In addition, the angle θ 1 of the traverse furrow 4A of central authorities is that the angle of the ditch line of centers 14 of central traverse furrow 4A is (following, angle θ 2, θ 3 for middle traverse furrow 4B and tire shoulder traverse furrow 4C define too), wherein the ditch line of centers 14 of central traverse furrow 4A will couple together between circumferential the tire of the open end of the both sides of central traverse furrow 4A intermediate point b1, b2.
As shown in Figure 1, the central traverse furrow 4A of present embodiment is formed as comprising: be configured in tire equator C a side (in Fig. 1 for left side) the first central traverse furrow 15A and be configured in the second central traverse furrow 15B of the opposite side (being right side in Fig. 1) of tire equator C.The first central traverse furrow 15A and the second central traverse furrow 15B arrange along the circumferential interval of tire with identical spacing Pa.The first central traverse furrow 15A and the second central traverse furrow 15B tire week are upwards staggering half pitch phase place and are configuring., the circumferential central portion of the tire of central traverse furrow 4A and center running lug 5 is arranged side by side on tire axial.Thus, by the angle θ of central traverse furrow 4A 1 is made as to above-mentioned scope, thereby suppress to slide to tire axial near the circumferential two ends of tire of the center running lug 5 that the rigidity of tire axial is little.Therefore improve abrasion resistance properties and resistance to partial wear performance.
As shown in Figure 4, central traverse furrow 4A comprises: the 16A of medial sulcus portion extending to tire axial outside with linearity from central tap drain 3A and the 16B of lateral sulcus portion extending to tire equator C side with linearity from middle tap drain 3B.The 16A of medial sulcus portion and the 16B of lateral sulcus portion are in upwards staggered positions of tire week.For example, the tire circumferential distance La of the inner 17i of the tire axial of the tire axial outer end 17e of the ditch line of centers 17a of the 16A of medial sulcus portion and the ditch line of centers 17b of the 16B of lateral sulcus portion be the 16A of medial sulcus portion ditch width W4a 13～23%.Central traverse furrow 4A so balancedly improves the rigidity of the tire circumferential end of drainage performance and center running lug 5.
The tire axial outer end 17e of the ditch line of centers 17a of the 16A of medial sulcus portion is the intermediate point with linearity tire axial outer end of costa colpi 18x, the 18y of the central traverse furrow 4A of extension outside tire axial from central tap drain 3A.The inner 17i of tire axial of the ditch line of centers 17b of the 16B of lateral sulcus portion is the intermediate point with linearity tire axial the inner of costa colpi 18z, the 18w of the central traverse furrow 4A of extension inside tire axial from middle tap drain 3B.
The viewpoint of during according to tire rolling, the water in ditch being discharged swimmingly from tire equator C side direction ground terminal Te side and the viewpoint of guaranteeing the rigidity of center running lug 5, the average ditch width that the ditch width W4(of central traverse furrow 4A like this and ditch line of centers 14 are rectangular, for middle traverse furrow 4B, tire shoulder traverse furrow 4C too) be for example preferably 4～16mm.
As shown in Figure 4, " roughly linearity " refers to following ditch, that is: in middle traverse furrow 4B, in costa colpi 20x(Fig. 4 of the circumferential side of tire, for the costa colpi of upside) on the most approaching in the middle of traverse furrow 4B ditch line of centers 21 some 20a, with in the costa colpi 20y(of the circumferential opposite side of tire Fig. 4, be the costa colpi of downside) on approach the some 20b of ditch line of centers 21 direction rectangular with respect to ditch line of centers 21 most distance W 5a be: the more than 80% of ditch width W5 of middle traverse furrow 4B.Middle traverse furrow 4B like this, owing to guaranteeing that resistance of water drainage is little, therefore keeps high drainage performance.Same with the situation of middle traverse furrow 4B, " the roughly linearity " of tire shoulder traverse furrow 4C is that the inner distance W6a of tire shoulder traverse furrow 4C is tire shoulder traverse furrow 4C shown in ditch width W6(Fig. 1) more than 80% ditch.
The ditch width W5 of middle traverse furrow 4B is 4.0～16.0mm., be less than 4.0mm drainage performance variation at the ditch width W5 of middle traverse furrow 4B.Ditch width W5 at middle traverse furrow 4B exceedes 16.0mm, and the circumferential rigidity of the tire of middle pattern block 6 reduces, thereby makes the degradation of resistance to partial wear.Therefore, more than in the middle of, the ditch width W5 of traverse furrow 4B is preferably 4.5mm, be preferably in addition below 15.5mm.According to same viewpoint, the ditch width W6 of tire shoulder traverse furrow 4C is more than 4.0mm, and more than being preferably 4.5mm, and the ditch width W6 of tire shoulder traverse furrow 4C, below 16.0mm, is preferably below 15.5mm.
As shown in Figure 3, middle traverse furrow 4B is less than the angle θ 1 of central traverse furrow 4A with respect to the angle θ 2 of tire axial.When craspedodrome is travelled, center running lug 5 effects have than the large load of middle pattern block 6.Therefore specify as described above the angle of each traverse furrow 4A, 4B, when the ora terminalis 6x of the ora terminalis 5x of the side that first lands of center running lug 5 and the side that first lands of middle pattern block 6 can balancedly relax ground connection thus from the impact on road surface.Therefore the slippage of center running lug 5 and middle pattern block 6 becomes evenly, thereby further improves abrasion resistance properties.
In order to make the slippage of center running lug 5, middle pattern block 6 and pattern block on tire shoulder 7 even, the angle θ 2 of middle traverse furrow 4B is preferably formed as being greater than the angle θ 3 of tire shoulder traverse furrow 4C with respect to tire axial.
In order effectively to bring into play above-mentioned effect, the angle θ 2 of middle traverse furrow 4B is preferably more than 3 °, more preferably more than 4 °, is preferably in addition below 10 °, more preferably below 9 °.The angle θ 3 of tire shoulder traverse furrow 4C is preferably more than 0.5 °, more preferably more than 1 °, is preferably in addition below 5 °, more preferably below 4.5 °.
As shown in Figure 1, the spacing Pb of middle traverse furrow 4B is identical with the spacing Pa of central traverse furrow 4A.Middle traverse furrow 4B and central traverse furrow 4A tire week are upwards staggering half pitch phase place and are configuring., the circumferential central portion of the tire of central traverse furrow 4A and middle pattern block 6 is arranged side by side along tire axial.And the central portion of the tire axial of middle traverse furrow 4B and center running lug 5 is arranged side by side on tire axial.The ora terminalis that suppresses thus the circumferential both sides of tire of center running lug 5 slides along tire axial along the ora terminalis of the circumferential both sides of tire of tire axial slip and the middle pattern block 6 of inhibition.Therefore further improve abrasion resistance properties, resistance to partial wear performance.
As shown in Figure 2, at the bottom of trench of the middle traverse furrow 4B of present embodiment, lacing wire is not set.Thus, even if also can guarantee the ditch volume of middle traverse furrow 4B latter stage in wearing and tearing.Therefore further improve drainage performance.In addition, at the bottom of trench of middle traverse furrow 4B, lacing wire (dotting) T also can be set, in the middle of this lacing wire T is less than from the height H 1 of the darkest bottom of trench protuberance 50% of the darkest trench depth D5 of traverse furrow 4B.The possibility that such lacing wire T makes a big impact to drainage performance is little.According to the viewpoint of further raising drainage performance, at the bottom of trench of the tire shoulder traverse furrow 4C of present embodiment, lacing wire is not set yet.Same with the situation of middle traverse furrow 4B in addition, 50% lacing wire (dotting) T that is less than the darkest trench depth D6 of tire shoulder traverse furrow 4C from the height H 2 of the darkest bottom of trench protuberance also can be set.
Though not particular determination, in order balancedly to guarantee the rigidity of drainage performance and each land portion 5,6 and 7, trench depth D4 and the D5 of central traverse furrow 4A and middle traverse furrow 4B are for example preferably 15.0～25.0mm.The trench depth D6 of tire shoulder traverse furrow 4C is for example preferably 10.0～20.0mm.
As shown in Figure 4, the land ratio Lc of middle section 5A is 1.05～1.25 times of land ratio Lm of zone line 6A.Middle section 5A is through the region between tire circumferential line 5c, the 5c of tire axial two ends 5e, the 5e of center running lug 5.Zone line 6A is through the region between tire circumferential line 6c, the 6c of tire axial two ends 6e, the 6e of middle pattern block 6.1.05 times of land ratio Lm that are less than zone line 6A at the land ratio Lc of middle section 5A, or the land ratio Lc of middle section 5A exceedes in the situation of 1.25 times of land ratio Lm of zone line 6A, cannot balancedly guarantee the rigidity of center running lug 5 and the rigidity of middle pattern block 6, thereby earth contact pressure when center running lug 5 and middle pattern block 6 are travelled becomes inhomogeneous.Therefore the difference of the slippage of center running lug 5 and middle pattern block 6 increases when tire rolling, thereby makes the degradation of resistance to partial wear.
On each pattern block 5 to 7 of present embodiment, be provided with and overlook the rill 22 extending along tire axial with crank-like roughly while observation.Such rill 22 can reduce the tire circumferential lengths of each pattern block 5 to 7, suppresses tire rolling and the slippage that produces.
High and suppress slippage in order to ensure the rigidity of each pattern block 5 to 7, the width W 7 of rill is preferably 1.0～3.0mm left and right.Equally, shown in depth D 7(Fig. 2 of rill) be preferably about 1.0～4.0mm.
On center running lug 5, middle pattern block 6 and pattern block on tire shoulder 7, be provided with chamfered section m, this chamfered section m is that top and each tap drain 3 that each tap drain 3 and each traverse furrow 4 are intersected cut rear formation with the top that rill 22 intersects obliquely with general triangular shape.Such chamfered section m can improve the rigidity of each pattern block 5 to 7, and inhibition becomes, and pattern block is damaged, the starting point of partial wear.
Above, although embodiments of the present invention are explained, the present invention is not limited to above-mentioned detailed description of the invention but can changes to variety of way and implements.
Embodiment
In order to confirm effect of the present invention, the heavy duty pneumatic vehicle tire of the 11.00R20 with the motif of Fig. 1 and the specification based on table 1 is tested.Except the ditch that table 1 is recorded, ditch width and the angle etc. of each ditch are as shown in Figure 1.In 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 authorities' traverse furrow: 21.0mm
The trench depth of middle traverse furrow: 21.0mm
The trench depth of tire shoulder: 14.5mm
The trench depth of rill: 2.0mm
Test method is as follows.
< drainage performance (wet road braking ability) >
Under the following conditions, by each full wheel that is installed on Japan's product truck (2-D car, installation abs braking device) of load carrying ability 8t for examination tire.And test driver is travelled testing vehicle on the test route of the asphalt coating of the depth of water 0.5～2.0mm, and has come into effect emergency braking from speed 65km/h.Stopping distance while now having measured from speed 60km/h to 20km/h.Result is with the inverse of stopping distance, and represents taking the value of embodiment 1 as 100 index.Numerical value is the bigger the better, and is nonconformity below 90.
Wheel rim: 8.00 × 20
Interior pressure: 780kPa
Loading conditions: each tire 30.4kN on axle drive shaft
The length of lacing wire/the be provided with length of the ditch line of centers of each traverse furrow of lacing wire: 30%( embodiment 6,7 and comparative example 5,6)
< abrasion resistance properties >
Test driver makes the above-mentioned testing vehicle 10000km that travels on dried asphalt road.Afterwards in 8 position measurements upwards of tire week the ditch surplus of central tap drain and middle tap drain.Result is with the aviation value of ditch surplus, and represents taking the value of embodiment 1 as 100 index.Numerical value is the bigger the better, and is nonconformity below 90.
The resistance to partial wear performance of < >
In 8 position measurements upwards of tire week abrasion loss poor at pattern block edge of the circumferential both sides of tire of poor and middle pattern block of abrasion loss at pattern block edge of the circumferential both sides of tire of center running lug of each testing tire of using under above-mentioned abrasion resistance properties.Result is with the inverse of the aviation value of the difference of abrasion loss, and represents taking the value of embodiment 1 as 100 index.Numerical value is the bigger the better, and 90 is nonconformity.
The resistance to TGC performance of < >
The ozone (500L/H) that sprays concentration 50pphm on one side travels each testing tire in following condition on one side on tumbler test machine.After travelling, the crack of the visual inspection bottom of trench by trier.Result is taking the tire of crack maximum as " 1 ", and 5 point-scores that the tire that does not produce crack is " 5 " represent.Test condition is as follows.
Interior 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 can be confirmed, compared with comparative example, has improved each performance the tyre equalizing of embodiment.In addition, in the middle of making, the ditch width of traverse furrow and tire shoulder traverse furrow changes and tests in preferred number range, and result is identical with this test result.
Claims (7)
1. an air-inflation tyre, by fetus face setting: 1 the central tap drain circumferentially extending continuously along tire in tire equator; The a pair of middle tap drain circumferentially extending continuously along tire in the tire axial both sides of this central authorities' tap drain; The a pair of tire shoulder tap drain circumferentially extending continuously along tire between above-mentioned middle tap drain and ground terminal; Connect many central traverse furrows between above-mentioned central tap drain and above-mentioned middle tap drain; Connect many middle traverse furrows between above-mentioned middle tap drain and above-mentioned tire shoulder tap drain; And connect many tire shoulder traverse furrows between above-mentioned tire shoulder tap drain and above-mentioned ground terminal,
Have thus: the center running lug of being divided by above-mentioned central tap drain, above-mentioned middle tap drain and above-mentioned central traverse furrow is arranged to a pair of center running lug forming along the circumferential interval of tire and be listed as; Pattern block in the middle of form a pair of being set by the middle pattern block that in the middle of above-mentioned, tap drain, above-mentioned tire shoulder tap drain and above-mentioned middle traverse furrow are divided along the circumferential interval of tire is listed as; And be listed as a pair of pattern block on tire shoulder forming being set by the pattern block on tire shoulder of above-mentioned tire shoulder tap drain, above-mentioned ground terminal and the division of above-mentioned tire shoulder traverse furrow along the circumferential interval of tire,
This airtyred being characterised in that,
In the middle of above-mentioned traverse furrow and above-mentioned tire shoulder traverse furrow taking linearity roughly extend and ditch width as 4.0mm～16.0mm,
The bottom of trench of traverse furrow and above-mentioned tire shoulder traverse furrow in the middle of above-mentioned, more than 50% lacing wire of the darkest trench depth that not arrange from the height of the darkest bottom of trench protuberance be above-mentioned each traverse furrow,
Through the region between the tire circumferential line at the tire axial two ends of above-mentioned center running lug that is the land ratio of middle section be: through 1.05 times～1.25 times of the land ratio of the region between the tire circumferential line at the tire axial two ends of pattern block in the middle of above-mentioned that is zone line
Above-mentioned central traverse furrow is 15 °～45 ° with respect to the angle of tire axial and is greater than the angle of above-mentioned middle traverse furrow with respect to tire axial.
2. air-inflation tyre according to claim 1, is characterized in that,
Dispose the tread-rubber that forms outer surface of tire at above-mentioned fetus face,
The complex modulus of elasticity E* of above-mentioned tread-rubber is 6.3MPa～7.7MPa.
3. air-inflation tyre according to claim 1 and 2, is characterized in that,
Above-mentioned central tap drain is circumferentially less than the ditch width of above-mentioned middle tap drain with linearity extension and its ditch width along tire,
In the middle of above-mentioned tap drain and above-mentioned tire shoulder tap drain along tire circumferentially extend with zig-zag and the amplitude of oscillation of each ditch line of centers more than 2mm.
4. according to the air-inflation tyre described in any one in claim 1～3, it is characterized in that,
Above-mentioned central traverse furrow comprises: be configured in tire equator a side the first central traverse furrow and be configured in the second central traverse furrow of the opposite side of tire equator,
Above-mentioned the first central traverse furrow and above-mentioned the second central traverse furrow, arrange along the circumferential interval of tire with identical spacing, and tire week upwards staggering half pitch phase place and configuring.
5. according to the air-inflation tyre described in any one in claim 1～4, it is characterized in that,
Traverse furrow and the above-mentioned central traverse furrow adjacent with this centre traverse furrow in the middle of above-mentioned, arrange along the circumferential interval of tire with identical spacing, and tire week upwards staggering half pitch phase place and configuring.
6. according to the air-inflation tyre described in any one in claim 1～5, it is characterized in that,
Above-mentioned central traverse furrow comprises: the medial sulcus portion that extend with linearity in outside from above-mentioned central tap drain to tire axial and the lateral sulcus portion of extending to tire equator side with linearity from above-mentioned middle tap drain,
Above-mentioned medial sulcus portion and above-mentioned lateral sulcus portion are in upwards staggered positions of tire week.
7. according to the air-inflation tyre described in any one in claim 1～6, it is characterized in that,
Above-mentioned fetus face has the directivity decorative pattern of having specified hand of rotation,
Above-mentioned central traverse furrow lands and rolls tiltedly after the tire rotation direction of tire axial lateral.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-283375 | 2012-12-26 | ||
| JP2012283375A JP5739862B2 (en) | 2012-12-26 | 2012-12-26 | Heavy duty pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103895453A true CN103895453A (en) | 2014-07-02 |
| CN103895453B CN103895453B (en) | 2016-11-02 |
Family
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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367624A (en) * | 2015-12-07 | 2018-08-03 | 米其林集团总公司 | The tyre surface of tire for heavy civil engineering vehicle |
| CN108621709A (en) * | 2017-03-24 | 2018-10-09 | 住友橡胶工业株式会社 | Tire |
| CN110740882A (en) * | 2017-06-12 | 2020-01-31 | 倍耐力轮胎股份公司 | Tyre for vehicle wheels |
| 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 |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3042789B1 (en) | 2013-10-04 | 2020-11-04 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| JP6043265B2 (en) * | 2013-10-04 | 2016-12-14 | 住友ゴム工業株式会社 | Pneumatic tire |
| CN106414404B (en) | 2014-04-11 | 2020-02-21 | 默克专利有限公司 | Material for organic electroluminescent device |
| 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 |
| 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 |
| JP6859802B2 (en) | 2017-03-30 | 2021-04-14 | 住友ゴム工業株式会社 | tire |
| 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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2012035697A (en) * | 2010-08-05 | 2012-02-23 | Bridgestone Corp | Pneumatic tire |
| CN102529597A (en) * | 2010-11-29 | 2012-07-04 | 住友橡胶工业株式会社 | Racing kart tire |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-12-26 JP JP2012283375A patent/JP5739862B2/en active Active
-
2013
- 2013-08-05 CN CN201310337017.1A patent/CN103895453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2012035697A (en) * | 2010-08-05 | 2012-02-23 | Bridgestone Corp | Pneumatic tire |
| CN102529597A (en) * | 2010-11-29 | 2012-07-04 | 住友橡胶工业株式会社 | Racing kart tire |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367624A (en) * | 2015-12-07 | 2018-08-03 | 米其林集团总公司 | The tyre surface of tire for heavy civil engineering vehicle |
| CN108621709A (en) * | 2017-03-24 | 2018-10-09 | 住友橡胶工业株式会社 | Tire |
| CN110740882A (en) * | 2017-06-12 | 2020-01-31 | 倍耐力轮胎股份公司 | Tyre for vehicle wheels |
| CN110740882B (en) * | 2017-06-12 | 2022-05-24 | 倍耐力轮胎股份公司 | Tyre for vehicle wheels |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014125109A (en) | 2014-07-07 |
| CN103895453B (en) | 2016-11-02 |
| JP5739862B2 (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103895453A (en) | Pneumatic tire | |
| CN104908527B (en) | Pneumatic tire | |
| KR101562679B1 (en) | Pneumatic tire | |
| CN103802608B (en) | Pneumatic tire | |
| JP5250063B2 (en) | Pneumatic tire | |
| CN105377587B (en) | Tyre for heavy load | |
| JP4469399B2 (en) | studless tire | |
| CN102463852B (en) | Air-inflation tyre | |
| CN105459733B (en) | Pneumatic tire | |
| US10279631B2 (en) | Pneumatic tire | |
| CN105564160A (en) | Pneumatic tire | |
| CN102416829B (en) | Air-inflation tyre | |
| CN103832221A (en) | Pneumatic tire | |
| CN103303069A (en) | Pneumatic tire | |
| CN107867124A (en) | Tire | |
| CN103707722A (en) | Pneumatic tire | |
| JP2014101039A (en) | Pneumatic tire | |
| CN104890451A (en) | Inflation tyre | |
| CN101181862B (en) | Pneumatic tire | |
| KR101898453B1 (en) | Pneumatic tire | |
| CN104943478A (en) | Pneumatic tire | |
| CN103991336A (en) | Pneumatic tire | |
| CN103991339A (en) | Heavy duty pneumatic tire | |
| CN102896981A (en) | Pneumatic tire | |
| CN102189900B (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |