CN102756619A - Pneumatic tyre - Google Patents
Pneumatic tyre Download PDFInfo
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- CN102756619A CN102756619A CN2012101127053A CN201210112705A CN102756619A CN 102756619 A CN102756619 A CN 102756619A CN 2012101127053 A CN2012101127053 A CN 2012101127053A CN 201210112705 A CN201210112705 A CN 201210112705A CN 102756619 A CN102756619 A CN 102756619A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0355—Circumferential grooves characterised by depth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Provided is pneumatic tyre capable of inhibiting the decrease of the manipulation stability and anti-uneven wearing performance and raising wet-path performance. Under the state of loading standard load, the ground plane of the tyre face (2) is set into tthat: the grounding length of the tyre circumference upon the tyre equator (C) is 1.05-1.15 times of the ground length at the tyre shoulder. The axial land length (Wc) of the tyre of the central land part (5) is 0.8-1.0 times of axial land width (Ws) of the tyre shoulder land part (6). The central land part comprises a central assistant channel (7) and a central transverse channel (8), wherein the central assistant channel (7) is in the area closer to the axial inner side of the tyre than the central position of the land part width (Wc) and continuously extends in the circumferential direction of the tyre, with channel depth less than the average channel depth of the central main channel (3) and the tyre shoulder main channel (4); and the central transverse channel (8) connects the central main channel (3) to the tyre shoulder main channel (4), with the channel depth less than the average channel depth. The tyre shoulder land part (6) has a strip-like pattern continuously extending in the circumferential direction of the tyre without interruption.
Description
Technical field
The present invention relates to suppress the air-inflation tyre of operation stabilization performance and anti-irregular wear performance decrease and the wet road of raising performance, relate in particular to and be suitable as the air-inflation tyre that light truck is used.
Background technology
The known air-inflation tyre that is formed with the block-type tread of a plurality of pattern blocks at fetus face.In recent years, for this air-inflation tyre, require the further raising of wet road performance.In order to improve wet road performance, be purpose with the moisture film of discharging swimmingly between fetus face and the road surface, proposed for example to increase the scheme etc. of the ditch width of the tap drain that is arranged at fetus face, traverse furrow.
Yet, in above-mentioned method,,, therefore have the problem of operation stabilization performance, anti-irregular wear mis-behave so the decorative pattern rigidity descends because ground contact area reduces.
Patent documentation 1:JP spy opens the 2002-46427 communique
Summary of the invention
The present invention proposes in view of above problem; Its main purpose is; Provide a kind of equipping position, counter drain and traverse furrow of each tap drain that circumferentially extends along tire with regulation trench depth, each land portion land portion width and ground plane be shaped as basically, suppress operation stabilization performance and anti-irregular wear performance decrease and improve the air-inflation tyre of wet road performance.
The invention that technical scheme 1 is put down in writing among the present invention is a kind of air-inflation tyre; Through the central tap drain of the circumferential extension continuously of tire and a pair of tire shoulder tap drain that circumferentially extends continuously along tire in tire axial two outsides of this central authorities' tap drain in the tire equator upper edge; And in a pair of tire shoulder land portion that fetus face marks off a pair of central land portion of between above-mentioned tire shoulder tap drain and above-mentioned central tap drain, extending and between above-mentioned tire shoulder tap drain and tyre surface ground terminal, extends; This airtyred being characterised in that; In wheel rim is assembled in regular wheel rim and filling standard, press and load normal loading and be under the state of loading normal loading on plane with the camber angle ground connection of 0 degree; The ground plane of fetus face is configured to: the circumferential ground contact length of the tire on the tire equator is and tire equator 1.05～1.15 times of the circumferential ground contact length of the tire of the tire shoulder position of 40% distance of tyre surface ground connection width at interval; Above-mentioned central land portion is configured to: the land portion width of the tire axial of this land portion of central authorities is more than 0.8 times and less than 1.0 times of land portion width of the tire axial of above-mentioned tire shoulder land portion; And portion is provided with on above-mentioned central land: central counter drain; Its than the midway location of above-mentioned land portion width the more axial area inside of roller tire circumferentially extend continuously along tire, and have 0.2～0.5 times the trench depth of average trench depth of trench depth of trench depth and the above-mentioned tire shoulder tap drain of above-mentioned central tap drain; Central authorities' traverse furrow, 0.2～0.5 times the trench depth that it connects above-mentioned central tap drain and above-mentioned tire shoulder tap drain and has above-mentioned average trench depth, above-mentioned tire shoulder land portion is along the circumferential continuous and unbroken strip decorative pattern of tire.
In addition; The invention that technical scheme 2 is put down in writing; On the airtyred basis that technical scheme 1 is put down in writing; The formation of above-mentioned central land portion comprises: than the above-mentioned central counter drain axially inboard inboard pattern block of roller tire and than the above-mentioned central counter drain axial outside pattern block in the outside of roller tire more more, the pattern block width of the tire axial of above-mentioned inboard pattern block is 0.6～0.9 times of pattern block width of above-mentioned outside pattern block.
In addition; The invention that technical scheme 3 is put down in writing; On the airtyred basis that technical scheme 2 is put down in writing; Above-mentioned inboard pattern block is provided with from the inboard sipes per tire of above-mentioned central tap drain to the semi-open type of tire axial outside extension, and above-mentioned outside pattern block is provided with from the outside sipes per tire of above-mentioned tire shoulder tap drain to the inboard semi-open type of extending of tire axial, and the total number of above-mentioned inboard sipes per tire is less than the total number of above-mentioned outside sipes per tire.
In addition; The invention that technical scheme 4 is put down in writing, on the airtyred basis that technical scheme 3 is put down in writing, above-mentioned inboard pattern block is because the above-mentioned central traverse furrow angle circumferential with respect to tire is 45～75 degree; Form the almost parallel quadrangle form thus; Above-mentioned outside pattern block is divided into a plurality of outsides pattern block small pieces by above-mentioned outside sipes per tire, and above-mentioned outside pattern block small pieces comprise: first outside small pieces, and it comprises the bight that is acute angle in the tire axial outside of above-mentioned outside pattern block; Second outside small pieces, it comprises the bight in obtuse angle in the tire axial outside of above-mentioned outside pattern block, the circumferential minimum length La of the tire of above-mentioned second outside small pieces is less than the circumferential minimum length Lb of the tire of above-mentioned first outside small pieces.
In addition; The invention that technical scheme 5 is put down in writing; On the airtyred basis that technical scheme 3 or 4 is put down in writing; Above-mentioned inboard pattern block is divided into a plurality of inboard pattern block small pieces by above-mentioned inboard sipes per tire, and above-mentioned inboard pattern block small pieces comprise: the first inboard small pieces, and it comprises the inboard bight that is acute angle of tire axial of above-mentioned inboard pattern block; The second inboard small pieces, it comprises the inboard bight in obtuse angle of tire axial of above-mentioned inboard pattern block, the minimum width Wa of the tire axial of the above-mentioned second inboard small pieces is less than the minimum width Wb of the tire axial of the above-mentioned first inboard small pieces.
Air-inflation tyre of the present invention passes through central tap drain that tire circumferentially extends continuously in the tire equator upper edge and a pair of tire shoulder tap drain that circumferentially extends continuously along tire in tire axial two outsides of this central authorities' tap drain at fetus face, and a pair of tire shoulder land portion that marks off a pair of central land portion of between above-mentioned tire shoulder tap drain and above-mentioned central tap drain, extending and between above-mentioned tire shoulder tap drain and tyre surface ground terminal, extend.
In addition; In wheel rim is assembled in regular wheel rim and filling standard, press and load normal loading and be under the state of loading normal loading on plane with the camber angle ground connection of 0 degree; The ground plane of fetus face is configured to, and the circumferential ground contact length of the tire on the tire equator is from tire equator 1.05～1.15 times of the circumferential ground contact length of the tire of the tire shoulder position of 40% distance of tyre surface ground connection width at interval.This air-inflation tyre can reduce earth contact pressure poor of poor and central land portion and tire shoulder land portion of the earth contact pressure of the tire axial both sides in the portion of central land.Therefore air-inflation tyre of the present invention can suppress the irregular wears such as the damaged wearing and tearing of tire shoulder that portion produces on tire shoulder land easily, and then improves anti-irregular wear performance.
In addition, the land portion width of the tire axial of central land portion is set to more than 0.8 times and less than 1.0 times of land portion width of the tire axial of tire shoulder land portion.Thus, during turning driving, can the rigidity of the tire shoulder land portion of bigger transverse force be arranged the raising effect, thereby can improve operation stabilization performance and anti-irregular wear performance.
In addition; Portion is provided with on above-mentioned central land: central counter drain; Its than the midway location of the land portion width of above-mentioned central land portion the more axial area inside of roller tire circumferentially extend continuously along tire, and have 0.2～0.5 times the trench depth of average trench depth of trench depth of trench depth and the above-mentioned tire shoulder tap drain of above-mentioned central tap drain; Central authorities' traverse furrow, it connects above-mentioned central tap drain and above-mentioned tire shoulder tap drain, and has 0.2～0.5 times trench depth of above-mentioned average trench depth.This central counter drain can be discharged the moisture film between central land portion and the road surface more reliably.In addition, central traverse furrow helps the water capacity in central tap drain, the central counter drain changed places and discharges to tire shoulder tap drain side.And the trench depth of central counter drain and central traverse furrow is defined as 0.2～0.5 times small depth of above-mentioned average depth.Therefore air-inflation tyre of the present invention can prevent that the rigidity of central land portion from descending, thereby guarantees operation stabilization performance and anti-irregular wear performance high-levelly, and further improves wet road performance.
In addition, tire shoulder land portion is along the circumferential continuous and unbroken strip decorative pattern of tire.Thus, further improve the rigidity of tire shoulder land portion, and can resist near the big variation of the earth contact pressure the tyre surface ground terminal, thereby operation stabilization performance and anti-irregular wear performance are guaranteed in higher level ground.
Description of drawings
Fig. 1 is the expansion drawing of the airtyred fetus face of expression an embodiment of the invention.
Fig. 2 (a) is the birds-eye view that the air-inflation tyre of this embodiment of expression is grounded on the ground-surface ground plane, (b) is the parallel cutaway view of tire equator face with the state of representing (a).
Fig. 3 is the partial enlarged drawing of Fig. 1.
Description of reference numerals: 2... fetus face; 3... central tap drain; 4... tire shoulder tap drain; 5... central land portion; 6... tire shoulder land portion; 7... central counter drain; 8... central traverse furrow; C... tire equator; The land portion width of Wc... central land portion; Ws... the land portion width of tire shoulder land portion; Te... tyre surface ground terminal.
The specific embodiment
As shown in Figure 1; The air-inflation tyre of this embodiment (below; Sometimes abbreviate " tire " as); For example be suitable as light truck and utilize, be provided with central tap drain 3 that tire circumferentially extends continuously in tire equator C upper edge and a pair of tire shoulder tap drain 4 that circumferentially extends continuously along tire in the tire axial both sides of this central authorities' tap drain 3 at its fetus face 2 with tire.Thus, mark off at fetus face 2: in a pair of central land portion 5 of extending between central tap drain 3 and the tire shoulder tap drain 4, a pair of tire shoulder land portion 6 of between tire shoulder tap drain 4 and tyre surface ground terminal Te, extending.Thereby the tire of this embodiment has four land portions altogether at fetus face 2.
At this; Above-mentioned " tyre surface ground terminal " Te is defined as; Wheel rim is assembled in the tire 1 under the non-loaded normal state of pressing in regular wheel rim and the filling standard, the axial earthing position in the outside of roller tire when loading normal loading and being the plane with the camber angle ground connection of 0 degree.In addition, the distance of the tire axial between this tyre surface ground terminal Te, the Te is defined as tyre surface ground connection width TW.In addition, the size of each one of tire etc. is not having to be the value under the normal state under the situation of particular determination.
In addition; Above-mentioned " regular wheel rim " is meant in the schematism of the specification that comprises tire institute foundation; Stipulate the wheel rim of this specification according to each tire; For example if JATMA then is " standard rim ", if TRA then is " Design Rim ", if ETRTO then is " Measuring Rim ".
In addition; Above-mentioned " pressing in the standard " is meant in the schematism of the specification that comprises tire institute foundation; Stipulate that according to each tire the air of each specification presses, if JATMA then be " high-altitude air pressure ", if TRA is then for showing the maxim that " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " put down in writing; If ETRTO then is " INFLATION PRESSURE ", but be to get 180kPa under the car situation about using at tire.
And; " normal loading " is meant in the schematism of the specification that is comprising tire institute foundation; Stipulate the load of each specification according to each tire, if JATMA then is " maximum load capability ", if the maxim that TRA is then put down in writing for table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES "; If E TRT O then is " LOAD CAPACITY ", but be to get 88% the load that is equivalent to above-mentioned load under the car situation about using at tire.
In this embodiment, above-mentioned central tap drain 3 circumferentially alternately is formed with by spreading all over tire: 3A of linearity portion that the ditch width of this central authorities' tap drain 3 is certain and ditch width are than the big bellying 3B of ditch width of the 3A of this linearity portion.This central tap drain 3 utilizes the 3A of linearity portion to suppress unsettled movements such as the rocking of glancing impact vehicle, sideslip, and can discharge the draining in the 3A of linearity portion swimmingly.In addition, can compile the ground-surface moisture film effectively at bellying 3B.Therefore, central tap drain 3 can improve operation stabilization performance, wet road performance.
In addition, above-mentioned tire shoulder tap drain 4 is along the circumferential linearity of tire, in this embodiment, forms with certain width.In addition, the width of the tire shoulder tap drain 4 of this embodiment forms wideer than central tap drain 3.This tire shoulder tap drain 4 helps to improve operation stabilization performance, wet road performance.
In addition, for the ditch width of central tap drain 3 and tire shoulder tap drain 4 (with the rectangular ditch width of the length direction of ditch, below, for other ditch too.) W1, W2 and trench depth (not shown), can be set at of all kinds by convention.Yet if above-mentioned ditch width W1, W2 and/or trench depth are excessive, the rigidity of each land portion 5,6 descends, thereby has the tendency of operation stabilization performance, anti-irregular wear mis-behave, on the contrary, if too small, the tendency that then exists drainage to worsen.Therefore ditch width W1, W2 for example are preferably 2.5～8.0% of tread width TW, and in addition, trench depth is preferably 8.0～15.0mm.
In addition, for the equipping position of tire shoulder tap drain 4, the tire axial distance L 1 between its line of centers G2 and the above-mentioned tire equator C for example; Be preferably more than 13% of tyre surface ground connection width TW; More preferably more than 20%, be preferably in addition below 26%, more preferably below 25%.Through tire shoulder tap drain 4 is set in such scope, each rigid balancing of central land portion 5 and tire shoulder land portion 6 is improved, improve the operation stabilization performance.
Like near the cross section Fig. 2 (a) and the tire equator C thereof is shown in (b); The ground plane Se that loads the fetus face 2 under the state of above-mentioned normal loading is (among this figure; By ground connection edge Y-Y area surrounded) be set to, the circumferential ground contact length Lc of the tire on the tire equator C is for from tire equator C 1.05～1.15 times of the circumferential ground contact length Ls of the tire of the tire shoulder position Sh of 40% the distance of tyre surface ground connection width TW at interval.That is, in the present invention, ground plane Se is set at the ratio of the ratio of Lc/Ls less than the Lc/Ls of the ground plane of existing tire, approaches the essentially rectangular shape thus.This tire; The difference of the poor and central land portion 5 of the earth contact pressure of the tire axial both sides in the land portion 5 of central authorities and the earth contact pressure of tire shoulder land portion 6 reduces; Thereby can suppress the damaged wearing and tearing of tire shoulder that portion 6 produces on tire shoulder land easily, and then improve anti-irregular wear performance.In addition, in this embodiment, because tire equator C is provided with central tap drain 3, so above-mentioned ground contact length Lc is that benchmark is set with the virtual ground edge Y1 of the ground connection edge Y that connects the tire axial both sides smoothly.
At this; If the ratio Lc/Ls of the above-mentioned ground contact length Lc on the tire equator C and the above-mentioned ground contact length Ls at Sh place, tire shoulder position is less than 1.05; The earth contact pressure of the tire shoulder land portion 6 when then going increases, and the stability of keeping straight on worsens, in addition; The wearing and tearing of tire shoulder land portion 6 can increase, thereby the tire shoulder wearing and tearing take place easily.On the contrary, if above-mentioned than Lc/Ls greater than 1.15, then become too small with the earth contact pressure that central land portion 5 compares tire shoulder land portion 6, tire shoulder land portion 6 produces skids, and is easy to generate the damaged wearing and tearing of tire shoulder equally.Based on this viewpoint, above-mentionedly be preferably more than 1.07 than Lc/Ls, and more preferably below 1.13.
In addition, as shown in Figure 1, central land portion 5 is set to, and the width W c of land portion of the tire axial of this land portion of central authorities 5 is more than 0.8 times and less than 1.0 times of land portion width Ws of the tire axial of above-mentioned tire shoulder land portion 6.This central land portion 5 and tire shoulder land portion 6 balancedly guarantee the rigidity of each land portion 5,6, improve operation stabilization performance, anti-irregular wear performance.Wherein, not under the situation of certain width at the width W c of land portion, the Ws of each land portion 5,6, its maximum width is defined as each land portion width.
In addition, central land portion 5 is provided with: central counter drain 7, its than the midway location of the above-mentioned land width W c of portion of this land portion of central authorities 5 the more axial area inside of roller tire circumferentially extend continuously along tire; Central authorities' traverse furrow 8, it connects above-mentioned central tap drain 3 and above-mentioned tire shoulder tap drain 4.Thus, central land portion 5 is divided into: inboard pattern block row 10R, its be with than central counter drain 7 more the inboard pattern block 10 that marks off of the axial inboard of roller tire form along the tire circumferential array; Outside pattern block row 11R, its be with than central counter drain 7 more the roller tire axially the outside pattern block 11 that marks off of the outside form along the tire circumferential array.
The central counter drain 7 of this embodiment circumferentially extends into linearity along tire.This central counter drain 7 can be discharged central land portion 5 and ground-surface moisture film effectively.
Above-mentioned central traverse furrow 8 extends with respect to tire axial obliquely.In a pair of central land portion 5,5, the inclination of central traverse furrow 8 can be equidirectional, also can be opposite sense.In this embodiment, the central traverse furrow 8 that is provided with to inclined (in this example) in each central land portion 5 towards the upper right side.This central traverse furrow 8 can utilize the centnifugal force when turning that the water in the central tap drain 3 is discharged to tire shoulder tap drain 4 swimmingly with the irrelevant to rotation direction of tire.
Central authorities' traverse furrow 8 angle θ 1 circumferential with respect to tire is preferably more than 45 degree, more preferably more than 50 degree, is preferably in addition below 75 degree, more preferably below 65 degree.If above-mentioned angle θ 1 increases, the drainage when going is worsened, on the contrary,, then might make the rigidity decline of central land portion 5 if above-mentioned angle θ 1 reduces.Wherein, in the present invention, owing to make the earth contact pressure in the central land portion 5 even, so can reduce the above-mentioned angle θ 1 of central traverse furrow 8.
In addition, shown in amplifying among Fig. 3, the central traverse furrow 8 of this embodiment comprises: be formed at constant wide 12 of middle body and the ditch width of this central authorities' traverse furrow 8; Connect this wide 12 first widening portion 13 that increases in central tap drain 3 sides with central tap drain 3 and ditch width; And connect above-mentioned wide 12 second widening portion 14 that increases in tire shoulder tap drain 4 sides with tire shoulder tap drain 4 and ditch width.This central traverse furrow 8 makes the draining between central tap drain 3 and the tire shoulder tap drain 4 more smooth and easy, helps to improve wet road performance.
In order to bring into play this effect effectively, the ditch width W4a of first widening portion 13 is preferably more than 1.1 than W4a/W4 with the ditch width of wide 12 ditch width W4, more preferably more than 1.3.Likewise, the ditch width W4b of second widening portion 14 is preferably more than 1.5 than W4b/W4 with the ditch width of wide 12 ditch width W4, more preferably more than 2.0.On the other hand, if above-mentioned ditch width increases than W4a/W4 and W4b/W4, the rigidity of inboard pattern block 10 and/or outside pattern block 11 is descended.Based on this viewpoint, above-mentioned ditch width is preferably below 2.1 than W4a/W4, more preferably below 1.9.In addition, above-mentioned ditch width is preferably below 4.5 than W4b/W4, more preferably below 4.0.In addition, for to the draining swimmingly of tyre surface ground terminal Te side, the ditch width W4b of second widening portion 14 is preferably more than the ditch width W4a of first widening portion 13.
In addition, the trench depth D4 (not shown) of trench depth D3 of central counter drain 7 (not shown) and central traverse furrow 8 all is set to 0.2～0.5 times of average trench depth DA (not shown) of trench depth of trench depth and the tire shoulder tap drain 4 of central tap drain 3.This central counter drain 7 and central traverse furrow 8 can prevent that the rigidity of central land portion 5 from descending, and discharge the moisture film between central land portion 5 and the road surface swimmingly.Wherein, If the trench depth D4 of the trench depth D3 of central counter drain 7 and central traverse furrow 8 is less than 0.2 times of average trench depth DA; Then can't expect the raising of wet road performance, on the contrary, if above-mentioned trench depth D3 and D4 surpass 0.5 times of average trench depth DA; The rigidity of then central land portion 5 descends, operation stabilization performance and anti-irregular wear mis-behave.Particularly, above-mentioned trench depth D3 and D4 be more than 0.3 times of above-mentioned average trench depth DA more preferably, and more preferably below 0.4 times.
In addition, based on the viewpoint of the above-mentioned effect of further performance, the ditch width W3 of central counter drain 7 is preferably more than 15% of ditch width W2 of tire shoulder tap drain 4, more preferably more than 20%, is preferably in addition below 45%, more preferably below 40%.Likewise, the ditch width of the minimum of central traverse furrow 8 (wide in the present example 12 ditch width) W4 is preferably more than the 1.0mm, more preferably more than the 2.0mm, is preferably in addition below the 5.0mm, more preferably below the 3.5mm.
The pattern block width W 6 of the tire axial of above-mentioned outside pattern block 11 is greater than the pattern block width W 5 of inboard pattern block 10.Thus, the lateral rigidity that acts on the outside pattern block 11 that bigger transverse force is arranged when turning is increased, thereby improve anti-irregular wear performance, operation stabilization performance.On the other hand, if the pattern block width W 6 of outside pattern block 11 is excessive, the lateral rigidity excessive descent of then inboard pattern block 10 might make the anti-irregular wear mis-behave of operation stabilization performance, this part.Therefore the pattern block width W 5 of inboard pattern block 10 is preferably more than 0.6 times of pattern block width W 6 of outside pattern block 11, more preferably more than 0.7 times, is preferably in addition below 0.9 times, more preferably below 0.8 times.
In addition, be provided with the inboard sipes per tire 15 of semi-open type, the extending and the outer end forms the terminal in this inboard sipes per tire 15 from inboard pattern block 10 to the tire axial outside from central tap drain 3 at the inboard pattern block 10 of this embodiment.Thus, inboard pattern block 10 is divided into a plurality of inboard pattern block small pieces 10a by inboard sipes per tire 15.The inboard pattern block small pieces 10a of this embodiment comprises: the first inboard small pieces 10a1, and it comprises the bight Ku1 of the acute angle that the tire axial of inboard pattern block 10 is inboard; The second inboard small pieces 10a2, it comprises the bight Ku2 at the obtuse angle that the tire axial of inboard pattern block 10 is inboard.
In addition, pattern block 11 is provided with the outside sipes per tire 16 of semi-open type in the outside, and this outside sipes per tire 16 forms the terminal from tire shoulder tap drain 4 to the inboard extension of tire axial and the inner in outside pattern block 11.Thus, outside pattern block 11 is divided into a plurality of outside pattern block small pieces 11a by outside sipes per tire 16.In this embodiment, outside pattern block small pieces 11a comprises: first outside small pieces 11a1, the bight Ks1 of the acute angle in the tire axial outside of pattern block 11 outside it comprises; Second outside small pieces 11a2, the bight Ks2's at the obtuse angle outside it comprises outside the tire axial of pattern block 11.
This inboard sipes per tire 15 and outside sipes per tire 16 can not make the rigidity excessive descent of central land portion 5, can relax distortion, suppress the heel toe wearing and tearing of each pattern block 10,11, in addition, can bring into play edge effect, improve the traction property on the wet road.
In addition, the total number of inboard sipes per tire 15 is preferably the total number less than above-mentioned outside sipes per tire 16.Thus, the rigidity that can be suppressed at the inboard pattern block 10 that earth contact pressure is big when going descends, and effect has the outside pattern block 11 of bigger transverse force to give more marginal element when turning.The earth contact pressure that in addition, can make the big outside pattern block 11 of the pattern block width of tire axial thus evenly or relax distortion etc.
In addition, inboard sipes per tire 15 and outside sipes per tire 16 are preferably all to extending with central traverse furrow 8 identical directions, and in addition, each sipes per tire 15,16 angle circumferential with respect to tire is preferably to form with the above-mentioned angle θ 1 identical angle of central traverse furrow.This each sipes per tire 15,16 helps to guarantee each the pattern block small pieces 10a that in inboard pattern block 10 and outside pattern block 11, divides, the higher rigidity of 11a.
In addition, in order further to improve above-mentioned effect, the tire axial length L 5 of inboard sipes per tire 15 is preferably more than 65% and below 85% of pattern block width W 5 of inboard pattern block 10.Likewise, the tire axial length L 6 of outside sipes per tire 16 is preferably more than 65% and below 85% of pattern block width W 6 of outside pattern block 11.
In addition, in this embodiment, the circumferential minimum length La of tire of second outside small pieces 11a2 forms, less than the circumferential minimum length Lb of tire of above-mentioned first outside small pieces 11a1.Promptly; Through comprising the rigidity above-mentioned minimum length Lb of first outside small pieces 11a1 of the bight Ks1 of the acute angle of the pattern block of decline easily; Be made as minimum length La greater than second outside small pieces 11a2 of the bight Ks2 at the obtuse angle that comprises the pattern block of fully guaranteeing easily rigidity; Therefore the rigid balancing of each outside small pieces 11a1 and 11a2 can be guaranteed, thereby the easy irregular wear that pattern block 11 produces in the outside etc. can be suppressed.On the other hand, more too small than above-mentioned minimum length Lb if above-mentioned minimum length La becomes, then the rigid balancing of each outside small pieces 11a1,11a2 descends, thereby might make anti-irregular wear mis-behave.Therefore the above-mentioned minimum length La of second outside small pieces 11a2 is preferably more than 0.65 with the ratio La/Lb of the above-mentioned minimum length Lb of first outside small pieces 11a1, more preferably more than 0.75, is preferably in addition below 0.95, more preferably below 0.85.
And in this embodiment, the minimum width Wa of the tire axial of the second inboard small pieces 10a2 forms the minimum width Wb less than the tire axial of the above-mentioned first inboard small pieces 10a1.Promptly; The above-mentioned minimum width Wb of the first inboard small pieces 10a1 of the bight Ku1 of the acute angle through will comprising the pattern block that rigidity descends easily is made as the minimum width Wa greater than the second inboard small pieces 10a2 of the bight Ku2 at the obtuse angle that comprises the pattern block of fully guaranteeing rigidity easily; Thereby synthetically guarantee the rigid balancing of each inboard small pieces 10a1 and 10a2, improve the operation stabilization performance.On the other hand, more too small if above-mentioned minimum width Wa becomes than above-mentioned minimum width Wb, the rigid balancing of each inboard small pieces 10a1 and 10a2 is descended, thereby might make anti-irregular wear mis-behave.Therefore the above-mentioned minimum width Wa of the second inboard small pieces 10a2 is preferably more than 0.85 with the ratio Wa/Wb of the above-mentioned minimum width Wb of the first inboard small pieces 10a1, more preferably more than 0.87, is preferably in addition below 0.95, more preferably below 0.93.
In addition, above-mentioned tire shoulder land portion 6 is along the circumferential continuous and unbroken strip decorative pattern of tire.Thus, further improve the rigidity of tire shoulder land portion 6, thereby further improve operation stabilization performance and anti-irregular wear performance.In addition, the effect of the irregular wear of the tyre surface ground terminal Te vicinity of the variation increase of inhibition earth contact pressure is bigger.
Tire equator C side in the tire shoulder land of this embodiment portion 6 is provided with: from tire shoulder tap drain 4 band ditch 20 in the tire shoulder that extends and in tire shoulder land portion 6, form the terminal outside the tire axial with little length; And the length of tire axial is than sipes per tire 21 in the little tire shoulder of the interior band ditch 20 of this tire shoulder.Their relax the distortion of strip decorative pattern, help to suppress easily track wearing and tearing that the lateral margin at the strip decorative pattern produces etc.In addition, be provided with in the tyre surface ground terminal Te of tire shoulder land portion 6 side: extend and band ditch 22 outside the tire shoulder at formation terminal tire shoulder land portion 6 in to tire axial is inboard with little length from tyre surface ground terminal Te; And the length of tire axial is than the outer sipes per tire 23 of the little tire shoulder of the outer band ditch 22 of this tire shoulder.
More than, especially preferred embodiment specify of the present invention, but the invention is not restricted to graphic embodiment, also deformable is that variety of way is implemented.
Embodiment
Manufacturing has the decorative pattern of Fig. 1 and the air-inflation tyre of using based on the light truck of the specification of table 1 (size: 205/85R15), and their each performance tested.
Wherein, common specification is following.
Tyre surface ground connection width TW:150mm
Rim size: 15 * 5.5J
< central tap drain >
Ditch width W1/ tyre surface ground connection width TW:5.1%
Trench depth: 10.1mm
< tire shoulder tap drain >
Ditch width W2/ tyre surface ground connection width TW:6.5%
Trench depth: 10.1mm
< central counter drain >
Ditch width W3/ tyre surface ground connection width TW:1.8%
< central traverse furrow >
Ditch width W4:2.2mm
Trench depth D4:2.3mm
< inboard sipes per tire >
Width: 6.0～9.0mm
The sipes per tire degree of depth: 8.5mm
< outside sipes per tire >
Width: 6.0～9.0mm
The sipes per tire degree of depth: 6.0mm
Other
< each tire shoulder band ditch >
Trench depth: 7.7mm
< each tire shoulder sipes per tire >
Width: 2.0～5.0mm
The sipes per tire degree of depth: 5.0～10.0mm
< operation stabilization performance >
Each examination confession tire is assemblied in the four wheels that the Japan with following specification produces light truck; Driven on the test route of dried asphalt road, to go by a chaufeur, the sensory evaluation through chaufeur pair is estimated with relevant road-holding property such as steering handwheel responsibility, rigidity sense, adherence properties.The result is that 100 index is represented with comparative example 1.The big more expression of numerical value is good more.
Free air capacity: 3000cm
3
The interior pressure: 600kPa
Load-carrying: 1t
< wet road performance (sideslip test) >
Utilize above-mentioned testing vehicle; One side entering radius that gathers way on one side is that the asphalt coating of 100m is provided with the route that the depth of water is the puddles of water of 10mm, length 20m interimly; And instrumentation transverse acceleration (horizontal G), and calculate the average horizontal G of front-wheel under the speed of 55～80km/h.The result is that 100 index is represented with comparative example 1.Numerical value is the bigger the better.
< anti-irregular wear performance >
Under vehicle condition same as described above, the difference of the abrasion loss at two costa colpi places of the tire axial of the tire shoulder tap drain after going is measured.Particularly, supply tire to be assemblied in four wheels each examination and, five places on the tire circumference are measured, and calculate aviation value at the dried asphalt road 15000km that goes.The result is that 100 index is represented with the inverse of comparative example 1.Numerical value is big more, and the more little expression of irregular wear amount is good more.
The result of test is shown in table 1.
Table 1
The results verification of test is compared with comparative example, and the various performances of the tire of embodiment are improved.
Claims (5)
1. air-inflation tyre; Through the central tap drain of the circumferential extension continuously of tire and a pair of tire shoulder tap drain that circumferentially extends continuously along tire in tire axial two outsides of this central authorities' tap drain in the tire equator upper edge; And in a pair of tire shoulder land portion that fetus face marks off a pair of central land portion of between above-mentioned tire shoulder tap drain and above-mentioned central tap drain, extending and between above-mentioned tire shoulder tap drain and tyre surface ground terminal, extends; This airtyred being characterised in that
In wheel rim is assembled in regular wheel rim and filling standard, press and load normal loading and be under the state of loading normal loading on plane with the camber angle ground connection of 0 degree,
The ground plane of fetus face is configured to: the circumferential ground contact length of the tire on the tire equator is and tire equator 1.05～1.15 times of the circumferential ground contact length of the tire of the tire shoulder position of 40% distance of tyre surface ground connection width at interval,
Above-mentioned central land portion is configured to: the land portion width of the tire axial of this land portion of central authorities is more than 0.8 times and less than 1.0 times of land portion width of the tire axial of above-mentioned tire shoulder land portion, and
Portion is provided with on above-mentioned central land: central counter drain; Its than the midway location of above-mentioned land portion width the more axial area inside of roller tire circumferentially extend continuously along tire, and have 0.2～0.5 times the trench depth of average trench depth of trench depth of trench depth and the above-mentioned tire shoulder tap drain of above-mentioned central tap drain; Central authorities' traverse furrow, 0.2～0.5 times the trench depth that it connects above-mentioned central tap drain and above-mentioned tire shoulder tap drain and has above-mentioned average trench depth,
Above-mentioned tire shoulder land portion is along the circumferential continuous and unbroken strip decorative pattern of tire.
2. air-inflation tyre according to claim 1 is characterized in that,
The formation of above-mentioned central land portion comprises: than the above-mentioned central counter drain axially inboard inboard pattern block of roller tire and more than the above-mentioned central counter drain axial outside pattern block in the outside of roller tire more,
The pattern block width of the tire axial of above-mentioned inboard pattern block is 0.6～0.9 times of pattern block width of above-mentioned outside pattern block.
3. air-inflation tyre according to claim 2 is characterized in that,
Above-mentioned inboard pattern block is provided with from the inboard sipes per tire of above-mentioned central tap drain to the semi-open type of tire axial outside extension,
Above-mentioned outside pattern block is provided with from the outside sipes per tire of above-mentioned tire shoulder tap drain to the inboard semi-open type of extending of tire axial, and
The total number of above-mentioned inboard sipes per tire is less than the total number of above-mentioned outside sipes per tire.
4. air-inflation tyre according to claim 3 is characterized in that,
Above-mentioned inboard pattern block forms the almost parallel quadrangle form thus because the above-mentioned central traverse furrow angle circumferential with respect to tire is 45～75 degree,
Above-mentioned outside pattern block is divided into a plurality of outsides pattern block small pieces by above-mentioned outside sipes per tire,
Above-mentioned outside pattern block small pieces comprise: first outside small pieces, and it comprises the bight that is acute angle in the tire axial outside of above-mentioned outside pattern block; Second outside small pieces, it comprises the bight in obtuse angle in the tire axial outside of above-mentioned outside pattern block,
The circumferential minimum length La of the tire of above-mentioned second outside small pieces is less than the circumferential minimum length Lb of the tire of above-mentioned first outside small pieces.
5. according to claim 3 or 4 described air-inflation tyres, it is characterized in that,
Above-mentioned inboard pattern block is divided into a plurality of inboard pattern block small pieces by above-mentioned inboard sipes per tire,
Above-mentioned inboard pattern block small pieces comprise: the first inboard small pieces, and it comprises the inboard bight that is acute angle of tire axial of above-mentioned inboard pattern block; The second inboard small pieces, it comprises the inboard bight in obtuse angle of tire axial of above-mentioned inboard pattern block,
The minimum width Wa of the tire axial of the above-mentioned second inboard small pieces is less than the minimum width Wb of the tire axial of the above-mentioned first inboard small pieces.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-099298 | 2011-04-27 | ||
| JP2011099298A JP5337196B2 (en) | 2011-04-27 | 2011-04-27 | Pneumatic tire |
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| Publication Number | Publication Date |
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| CN102756619A true CN102756619A (en) | 2012-10-31 |
| CN102756619B CN102756619B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210112705.3A Active CN102756619B (en) | 2011-04-27 | 2012-04-17 | Air-inflation tyre |
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| Country | Link |
|---|---|
| JP (1) | JP5337196B2 (en) |
| KR (1) | KR101787770B1 (en) |
| CN (1) | CN102756619B (en) |
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| CN104442208A (en) * | 2013-09-23 | 2015-03-25 | 招远市东晟橡胶制品有限公司 | Vehicle tire |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2012228981A (en) | 2012-11-22 |
| JP5337196B2 (en) | 2013-11-06 |
| KR20120121833A (en) | 2012-11-06 |
| CN102756619B (en) | 2016-01-13 |
| KR101787770B1 (en) | 2017-10-18 |
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