CN105691112A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN105691112A CN105691112A CN201510829993.8A CN201510829993A CN105691112A CN 105691112 A CN105691112 A CN 105691112A CN 201510829993 A CN201510829993 A CN 201510829993A CN 105691112 A CN105691112 A CN 105691112A
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- China
- Prior art keywords
- transverse groove
- major trough
- tire
- landing part
- groove
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric 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
- B60C11/032—Patterns comprising isolated recesses
- B60C11/0323—Patterns comprising isolated recesses tread comprising channels under the tread surface, e.g. for draining water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
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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
- B60C2011/0353—Circumferential grooves characterised by width
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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
Abstract
The present invention provides a pneumatic tire (1). A tread portion (2) comprises a first main groove (3) and a second main groove (4), the second main groove is adjacent to the first main groove and arranged to an outer side of the axial direction of the tire relative to the first main groove, and a first landing portion (9) is formed between the first main groove and the second main groove. The first landing portion (9) includes: a first transverse groove (15) extending from the first main groove and comprising an inner end (15e) ended in the first landing portion (9); a second transverse groove (16) extending from the second main groove and comprising an inner end (16e) ended in the first landing portion (9); and a longitudinal slot (17) communicated with the second transverse groove (16) and provided with two ends (17e) (17e) ended in the first landing portion (9). The tire axial length of the second transverse groove (16) is more than 50% of the tire axial maximum width of the first landing portion (9). According to the pneumatic tire, stable performance of manipulating on a dry pavement is maintained and turning performance on a wet pavement is improved.
Description
Technical field
The present invention relates to a kind of pneumatic tire, this pneumatic tire maintains the control stability on dry pavement and improves the turn performance on wet road surface。
Background technology
In recent years, it is desirable to there is the pneumatic tire of excellent wetland performance。In order to make airtyred wetland performance improve, for instance having such technology, the landing part being arranged at fetus face is provided with transverse groove, this transverse groove extends completely across this landing part。
But, pneumatic tire as above has the rigidity of the landing part of fetus face to diminish, and dry pavement and the control stability on wet road surface worsen such problem。
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-116306 publication
Summary of the invention
The present invention proposes in view of as above problem points, and its main purpose is in that to provide a kind of pneumatic tire, it is possible to maintains the control stability on dry pavement and can improve the turn performance on wet road surface。
The pneumatic tire of the present invention, there is fetus face, wherein, described fetus face is provided with multiple major trough extended continuously at tire circumferential direction, described major trough comprises the 1st major trough and the 2nd major trough, 2nd major trough is adjacent with described 1st major trough and is arranged at outside tire axial compared with described 1st major trough, it is formed with the 1st landing part between described 1st major trough and described 2nd major trough, being provided with the 1st transverse groove in described 1st landing part, the 1st transverse groove extends from described 1st major trough and has the inner terminated in described 1st landing part；2nd transverse groove, the 2nd transverse groove extends from described 2nd major trough and has the inner terminated in described 1st landing part；And vertical slit, this vertical slit connects with described 2nd transverse groove and the two ends of this vertical slit terminate in described 1st landing part, more than the 50% of the tire axial Breadth Maximum that tire axial length is described 1st landing part of described 2nd transverse groove。
The pneumatic tire of the present invention, preferably, described fetus face has asymmetric decorative pattern, this asymmetric decorative pattern specify to vehicle install towards, described asymmetric decorative pattern comprises the inner tread end being positioned at vehicle interior side when tire is installed to vehicle, and described 2nd major trough is arranged at the side near inner tread end。
The pneumatic tire of the present invention, it is preferred that described 1st transverse groove and described 2nd transverse groove tilt relative to tire axial。
The pneumatic tire of the present invention, it is preferred that described 1st transverse groove and described 2nd transverse groove are mutually towards inclined。
The pneumatic tire of the present invention, preferably, described 1st transverse groove is alternately arranged on tire circumferential direction with described 2nd transverse groove, and the described inner of described 1st transverse groove that the two ends of described vertical slit are not adjacent with on tire circumferential direction connects but positioned adjacent。
The pneumatic tire of the present invention, it is preferred that described vertical slit extends along tire circumferential direction。
The pneumatic tire of the present invention, it is preferred that the groove depth of described vertical slit is 1～2mm。
The pneumatic tire of the present invention, it is preferred that maximum in the groove width that groove width is each described major trough of described 2nd major trough。
The effect of invention
The airtyred fetus face of the present invention, is provided with the 1st landing part between the 1st major trough and the 2nd major trough, and the 2nd major trough and the 1st major trough are adjacent and be arranged on outside tire axial compared with the 1st major trough。It is provided with in the 1st landing part and extends and have the 1st inner transverse groove terminated in the 1st landing part from the 1st major trough and extend from the 2nd major trough and there is the 2nd inner transverse groove terminated in the 1st landing part。
These the 1st transverse grooves and the 2nd transverse groove not exclusively cross the 1st landing part, and therefore the 1st landing part is formed as rib that is continuous at tire circumferential direction and that have high circumferencial direction rigidity and lateral stiffness。Such 1st landing part is favorably improved the control stability on dry pavement。It addition, when advancing in wet road surface, the moisture film of the lower section of the 1st landing part can be discharged to the 1st major trough or the 2nd major trough of the both sides of the 1st landing part expeditiously via the 1st transverse groove or the 2nd transverse groove。Further, more than the 50% of the Breadth Maximum of the tire axial that length is the 1st landing part of the tire axial of the 2nd transverse groove, therefore, it is possible to reliably discharge more water to tyre surface side (the 2nd major trough side)。
It addition, the airtyred fetus face in the present invention is provided with vertical slit, this vertical slit and the connection of the 2nd transverse groove and two ends terminate in the 1st landing part。Such vertical slit can not make the 1st landing part lateral stiffness reduce and the 1st landing part provide tire circumferential direction marginal element。Therefore, the pneumatic tire of the present invention is turned when advancing on wet road surface, and vertical slit can improve the frictional force of road pavement。When advancing it addition, turn on wet road surface, vertical slit because act on the cross force of the 1st landing part and to the direction compression of compression groove width。The compression of such vertical slit makes the water in vertical slit discharge to the 2nd major trough well via the 2nd transverse groove impetus。The pneumatic tire of the present invention passes through these potentiations, it is possible to play the high turn performance on wet road surface。
Accompanying drawing explanation
Fig. 1 is the expanded view of the airtyred fetus face of one embodiment of the present invention。
Fig. 2 is the enlarged drawing of the fetus face of the vehicle interior side of Fig. 1。
Fig. 3 is the enlarged drawing of the fetus face of the vehicle outside of Fig. 1。
Fig. 4 is the expanded view of the fetus face of other embodiments。
Fig. 5 is the expanded view of the fetus face of another other embodiments。
Fig. 6 is the expanded view of the fetus face of comparative example。
Fig. 7 is the expanded view of the fetus face of other comparative examples。
Symbol description
1 pneumatic tire
2 fetus faces
3 the 1st major troughs
4 the 2nd major troughs
9 the 1st landing parts
15 the 1st transverse grooves
The inner of 15e the 1st transverse groove
16 the 2nd transverse grooves
The inner of 16e the 2nd transverse groove
17 vertical slits
The two ends of the vertical slit of 17e
Ti tyre surface end
Detailed description of the invention
Hereinafter, based on accompanying drawing, one mode of the enforcement of the present invention is illustrated。
Fig. 1 has illustrated the expanded view of the fetus face 2 of the pneumatic tire 1 representing one embodiment of the present invention。The pneumatic tire (being sometimes also only called " tire " below) 1 of present embodiment is such as suitably used as the pneumatic tire into passenger car。
As it is shown in figure 1, fetus face 2 has asymmetrical tread contour, this asymmetrical tread contour specify to vehicle install towards。Fetus face 2 has the outside tyre surface end To being positioned at vehicle outside to vehicle when tire 1 is installed and the inner tread end Ti being positioned at vehicle interior side to vehicle when installing。To vehicle install towards such as representing by word etc. at side of sidewall portion (not shown)。
Specify that described each " tyre surface end " To, Ti is as the tire 1 regular load of load making normal state, and it being grounding to, with the state of camber angle 0 degree, the earthing position that most roller tire during plane is axially external, normal state refers to and is assembled in regular wheel rim at wheel rim and is filled with regular intrinsic pressure non-loaded state。Under normal state, it is stipulated that the distance of each tire axial between tyre surface end To, Ti is as tyre surface ground connection width TW。When not regulation especially in advance, the size etc. in each portion of tire is the value measured under normal state。
" regular wheel rim " refers in the schematism comprising the specification that tire is based on, this specification wheel rim to every kind of tire defined, in JATMA it is such as " standard rim ", TRA is " design wheel rim (DesignRim) ", is then " measuring wheel rim (MeasuringRim) " in ETRTO。
" regular intrinsic pressure " refers in the schematism comprising the specification that tire is based on, each specification air pressure to every kind of tire defined, JATMA is " most hyperbar ", TRA is the maximum recorded in table " tyre loads restriction (TIRELOADLIMITSATVARIOUSCOLDINFLATIONPRESSURES) under different cold the blowing pressures ", is " the blowing pressure (INFLATIONPRESSURE) " in ETRTO。When tire is passenger car, regular intrinsic pressure for 180kPa。
" regular load " refers in the schematism comprising the specification that tire is based on, the load to every kind of tire defined of each specification, JATMA is " maximum load capability ", TRA is the maximum recorded in table " tyre loads restriction (TIRELOADLIMITSATVARIOUSCOLDINFLATIONPRESSURES) under different cold the blowing pressures ", is " load capacity (LOADCAPACITY) " in ETRTO。When tire is passenger car, regular load is the load of be equivalent to described load 88%。
Fetus face 2 in present embodiment be provided with multiple along tire circumferential direction continuously and the major trough extended。
In the present embodiment, major trough comprises the 1st major trough the 3, the 2nd major trough the 4, the 3rd major trough the 5 and the 4th major trough 6。1st major trough 3 is arranged at than tire equator C more by the position of vehicle interior side。2nd major trough 4 is disposed adjacent with the 1st major trough 3 in most inner tread end Ti side。3rd major trough 5 is arranged at outermost tyre surface end To side。4th major trough 6 is more being disposed adjacent with the 3rd major trough 5 by vehicle outside than tire equator C。
Each major trough 3 to 6 is the linearity along tire circumferential direction。Water in groove can be discharged by such major trough 3 to 6 swimmingly to the rear of direction of rotation, therefore improves wetland performance。
In the present embodiment, the groove width of the major trough of vehicle interior side is formed as bigger than the groove width of the major trough of vehicle outside。Generally, when turning is advanced, the cross force acted in the landing part of vehicle outside is bigger than the cross force acted in the landing part of vehicle interior side。Therefore, in order to make the cornering force to vehicle outside and vehicle interior side uniformly improve control stability, it is necessary to the tire axial rigidity of the landing part corresponding with cross force。Therefore, preferably the groove width W2 of the 2nd major trough 4 is formed bigger than the groove width W3 of the 3rd major trough 5。It addition, the landing part of tire equator C side is difficult to discharge the moisture film of the lower section of each landing part compared with the landing part of tyre surface end To, Ti side of both sides。Therefore, preferably groove width W1, the W4 of the 1st major trough the 3 and the 4th major trough 6 improve greatly drainage performance than the groove width W3 of the 3rd major trough 5。It addition, in order to be effectively discharged out being difficult to act on the moisture film of the lower section of the landing part between the 1st major trough the 3 and the 2nd major trough 4 of relatively larger transverse power, in the present embodiment, the groove width W2 making the 2nd major trough 4 is maximum。It addition, the groove width of each major trough is not limited to such mode。
From the viewpoint effectively playing above-mentioned effect, the groove width W1 of the 1st major trough 3 is preferably the 4.5%～8.5% of tyre surface ground connection width TW。The groove width W2 of the 2nd major trough 4 is preferably the 5.5%～9.5% of tyre surface ground connection width TW。The groove width W3 of the 3rd major trough 5 is preferably the 1.5%～5.5% of tyre surface ground connection width TW。The groove width W4 of the 4th major trough 6 is preferably the 4%～8% of tyre surface ground connection width TW。Though being not particularly limited, but the groove depth of each major trough 3 to 6 (omitting diagram) is preferably 7.0～9.5mm。
Fetus face 2 is formed with the 1st landing part 13, landing part the 12 and the 5th, landing part the 11, the 4th, landing part the 10, the 3rd, landing part the 9, the 2nd by each major trough 3 to 6。
The 1st landing part 9 is divided by the 1st major trough the 3 and the 2nd major trough 4。The 2nd landing part 10 is divided with inner tread end Ti by the 2nd major trough 4。The 3rd landing part 11 is divided by outside tyre surface end To and the 3 major trough 5。The 4th landing part 12 is divided by the 3rd major trough the 5 and the 4th major trough 6。The 5th landing part 13 is divided by the 1st major trough the 3 and the 4th major trough 6。
Fig. 2 is the enlarged drawing of the 1st landing part 10, landing part the 9 and the 2nd。As in figure 2 it is shown, arrange the 1st transverse groove the 15, the 2nd transverse groove 16 and vertical slit 17 in the 1st landing part 9。
1st transverse groove 15 extends from the 1st major trough 3 and has the inner 15e terminated in the 1st landing part 9。The groove width of the 1st transverse groove 15 of present embodiment is incremented by towards the 1st major trough 3 side。Thus, the water in groove is smoothly discharged the 1st major trough 3。
1st transverse groove 15 has the 1st groove edge 15a and the 2nd groove edge 15b extended in the opposing party side of tire circumferential direction extended in a side side of tire circumferential direction。Till 1st groove edge 15a of present embodiment linearly extends to the 1st major trough 3 from described inner 15e。2nd groove edge 15b of present embodiment from described inner 15e arc-shaped extend to the 1st major trough 3 till。The rigidity of the 1st landing part 9 is maintained higher by such 1st transverse groove 15。
1st transverse groove 15 tilts relative to tire axial。Thus, earth contact pressure when advancing of keeping straight on, cross force when advancing of turning is utilized more to be smoothly discharged the water in groove。
In order to effectively play effect as above, the 1st transverse groove 15 is preferably 30～50 degree relative to the angle, θ 1 of tire axial。Angle, θ 1 such as the 1st transverse groove 15 of present embodiment is defined by the arranging angle of the 1st groove edge 15a linearly formed。
The length L1 of the tire axial of the 1st transverse groove 15 is preferably the 25%～45% of the tire axial Breadth Maximum Wa of the 1st landing part 9。That is, when the length L1 of the 1st transverse groove 15 less than the 1st landing part 9 Breadth Maximum Wa 25%, have the worry that wetland performance cannot be made to improve。When the 1st transverse groove 15 length L1 more than the 1st landing part 9 Breadth Maximum Wa 45%, have the worry that the rigidity of the 1st landing part 9 reduces。
In order to effectively play above-mentioned effect, the maximum groove width W5 of the 1st transverse groove 15 is preferably the 20%～30% of the tire axial Breadth Maximum Wa of the 1st landing part 9。It addition, the groove depth of the 1st transverse groove 15 (omitting diagram) is preferably the 65%～75% of the groove depth of the 1st major trough 3。It addition, the groove width such as the 1st transverse groove 15 of present embodiment is defined as the distance intermarginal with the groove in the 1st groove edge 15a direction at a right angle linearly extended。
2nd transverse groove 16 extends from the 2nd major trough 4 and has the inner 16e terminated in the 1st landing part 9。So, owing to the 1st transverse groove the 15 and the 2nd transverse groove 16 crosses the 1st landing part 9 by halves, therefore the 1st landing part 9 is formed as rib that is continuous at tire circumferential direction and that have high circumferencial direction rigidity and lateral stiffness。Thus the control stability on dry pavement can be improved in the 1st landing part 9。It addition, when advancing in wet road surface, the moisture film of the lower section of the 1st landing part 9 can be discharged to the 1st major trough the 3 or the 2nd major trough 4 of the both sides of the 1st landing part 9 effectively via the 1st transverse groove the 15 or the 2nd transverse groove 16。
Towards the 2nd major trough 4, groove width W6 is incremented by 2nd transverse groove 16。Water in its groove can be smoothly discharged the 2nd major trough 4 by such 2nd transverse groove 16。In the present embodiment, the 2nd transverse groove 16 linearly extends。
2nd transverse groove the 16 and the 1st transverse groove 15 is alternately arranged on tire circumferential direction。Thus, the tire axial rigidity homogenization of the 1st landing part 9 is made throughout tire circumferential direction。" alternately arranged " refers to, the state that the inner 16e of inner 15e and the 2 transverse groove 16 of the 1st transverse groove 15 misplaces on tire circumferential direction。In order to effectively play effect as above, the tire circumferential direction distance La of the inner 16e of inner 15e and the 2 transverse groove 16 of the 1st transverse groove 15 is preferably more than the 25% of the tire circumferential direction spacing P1 of the 1st transverse groove 15, more preferably more than 30%。
In the present embodiment, the 2nd transverse groove 16 is connected with the 2nd major trough 4 being arranged near inner tread end Ti side。Thus, even if in acting on the landing part of vehicle interior side of the little cross force of the cross force being compared to the landing part for vehicle outside, also utilizing cross force that the water in groove is smoothly discharged inner tread end Ti side (the 2nd major trough 4), therefore wetland performance improves。It addition, the 2nd major trough 4 being connected to the 2nd transverse groove 16 can also be arranged near tyre surface end To side, outside。
More than the 50% of the tire axial Breadth Maximum Wa that tire axial length L2 is the 1st landing part 9 of the 2nd transverse groove 16。Thereby, it is possible to reliably tyre surface end Ti side (the 2nd major trough 4) discharges more water to the inside。In order to reliably play such effect, the tire axial length L2 of the 2nd transverse groove 16 is preferably more than the 55% of the tire axial Breadth Maximum Wa of the 1st landing part 9。It addition, when the tire axial length L2 of the 2nd transverse groove 16 is excessive, have the worry that the decorative pattern rigidity of the 1st landing part 9 reduces。Therefore, the tire axial length L2 of the 2nd transverse groove 16 is preferably less than the 70% of the tire axial Breadth Maximum Wa of the 1st landing part 9, more preferably less than 65%。
2nd transverse groove 16 tilts to tire axial。Thus, it is also possible to utilize cross force when advancing of turning, ground pressure when advancing of keeping straight on that the water in the 2nd transverse groove 16 is smoothly discharged to the 2nd major trough 4。In order to effectively play such effect, the angle, θ 2 relative to tire axial of the 2nd transverse groove 16 is preferably 30～50 degree。The angle, θ 2 of the 2nd transverse groove 16 is defined in the angle of a sequence of groove center line 16c of tire axial by by the centre position of tire circumferential direction line intermarginal for the groove by the 2nd transverse groove 16。
2nd transverse groove the 16 and the 1st transverse groove 15 is to inclined。Thereby, it is possible to make the tire axial rigidity of the 1st landing part 9 impartial throughout tire circumferential direction ground convergence。Therefore, it is possible to the turn performance on the control stability being greatly improved on dry pavement, wet road surface。
For the control stability maintained on dry pavement and the turn performance improving wet road surface, the groove width W6 of the 2nd transverse groove 16 is preferably the 15%～25% of the tire axial Breadth Maximum Wa of the 1st landing part 9。It addition, the groove depth of the 2nd transverse groove 16 (omitting diagram) is preferably the 65%～75% of the groove depth of the 2nd major trough 4。
Vertical slit 17 connects with the 2nd transverse groove 16 and two ends 17e, 17e terminate in the 1st landing part 9。Such vertical slit 17 can not make the lateral stiffness of the 1st landing part 9 reduce, and provides the marginal element of tire circumferential direction to the 1st landing part 9。Therefore, when on wet road surface, turning is advanced, the vertical slit 17 of present embodiment can improve the frictional force of road pavement。Further, turn in wet road surface when advancing, vertical slit 17 due to act on the cross force of the 1st landing part 9 and to the direction compression making groove width W7 reduce。The compression of such vertical slit 17 makes the water in vertical slit 17 discharge to the 2nd major trough 4 well via the 2nd transverse groove 16 impetus。Therefore, the wet turn performance on road surface is greatly improved。
Vertical slit 17 extends along tire circumferential direction。Thus, cross force when advancing of turning acts on more greatly near vertical slit 17, therefore makes the groove width W7 of vertical slit 17 produce to reduce the compression in direction further。Thus, when turning traveling, the water in vertical slit 17 is made to discharge to the 2nd major trough 4 more swimmingly。It addition, " extending along tire circumferential direction " refers to that the angle, θ 3 relative to tire circumferential direction of vertical slit 17 is below 5 degree。The angle, θ 3 of vertical slit 17 is defined with a sequence of dummy line 17c of straight line by by two ends 17e, 17e of vertical slit 17。
In the present embodiment, two ends 17e, 17e of vertical slit 17 are positioned near the inner 15e of the 1st transverse groove 15, do not connect with the inner 15e of the 1st transverse groove 15。Such vertical slit 17 maintains the rigidity of the 1st bigger landing part 9, and makes the water in vertical slit 17 reliably be discharged to inner tread end Ti side (the 2nd major trough 4)。
The vicinity of inner 15e of the 1st transverse groove 15 " the outer end 17e of vertical slit 17 be positioned at " refers to, in order to effectively play above-mentioned effect, for instance the 5%～15% of the tire axial Breadth Maximum Wa that beeline Lb is the 1st landing part 9 of the tire circumferential direction of the inner 15e of outer end 17e and the 1 transverse groove 15 of vertical slit 17。When described beeline Lb more than the 1st landing part 9 Breadth Maximum Wa 15%, the tire circumferential direction length L3 of vertical slit 17 diminishes, and has the worry of the moisture film of the lower section that cannot effectively gather the 1st landing part 9。
Preferably vertical slit 17 the 1st transverse groove 15 that to be arranged on tire circumferential direction adjacent is inner between 15e, 15e。Thus, it is formed without vertical slit 17 overlapping portion overlapping on tire circumferential direction with the 1st transverse groove 15 or described overlapping portion diminishes, therefore, it is possible to maintain the tire axial rigidity of the 1st bigger landing part 9。The compacting effect of the moisture film produced in order to ensure vertical slit 17 and maintain the tire axial rigidity of the 1st landing part 9, preferably the 75%～95% of the tire circumferential direction spacing P1 that tire circumferential direction length L3 is the 1st transverse groove 15 of vertical slit 17。
The vertical slit 17 of present embodiment connects with the 2nd transverse groove 16 in the position offset to tire circumferential direction position from the centre position of its tire circumferential direction length L3。2nd transverse groove 16, from vertical slit 17 tyre surface end Ti side to the inside, extends in one direction, and this direction is the direction from the skew of position, described centre position。Thus, the corner portion 18 of the side, obtuse angle owing to being formed between vertical slit the 17 and the 2nd transverse groove 16 of the 1st landing part 9 is arranged at the longer side separated on tire circumferential direction of vertical slit 17 by the 2nd transverse groove 16, therefore suppresses the reduction of the decorative pattern rigidity in corner portion 18。When inner 16e excessive position skew from the centre position of vertical slit 17 of the 2nd transverse groove 16, the described distance La of the inner 15e of inner 16e and the 1 transverse groove 15 of the 2nd transverse groove 16 diminishes, and has the worry that the tire axial rigidity gradient change of the 1st landing part 9 is big。From such viewpoint, it is preferable that the tire circumferential direction distance Lc of the inner 16e of outer end 17e and the 2 transverse groove 16 of the tire circumferential direction of vertical slit 17 is the 20%～40% of the tire circumferential direction length L3 of vertical slit 17。
In order to effectively make to indulge produced by cross force when turning is advanced the reduction of the lateral stiffness of the compression generation of slit 17 and suppression the 1st landing part 9, it is preferable that the 3%～13% of the tire axial Breadth Maximum Wa that average groove width W7 is the 1st landing part 9 of vertical slit 17。According to same viewpoint, it is preferable that the groove depth (omitting diagram) of vertical slit 17 is about 1～2mm。
So, by arranging the 1st transverse groove the 15, the 2nd transverse groove 16 and vertical slit 17, when turning traveling, even if having the 1st landing part 9 of the vehicle interior side of the cross force less than the 3rd landing part 12, landing part the 11, the 4th of vehicle outside in effect, it is also possible to swimmingly the moisture film of the lower section of the 1st landing part 9 is effectively discharged out to the 1st major trough the 3, the 2nd major trough 4。Therefore, it is possible to play the high turn performance on wet road surface。
Tire shoulder sipes per tire 22 inside tire shoulder sipes per tire 21 and the 2nd it is provided with inside the tire shoulder transverse groove the 20, the 1st of inner side in the 2nd landing part 10。
Inner side tire shoulder transverse groove 20 extends from inner tread end Ti to the 2nd major trough 4 side, and has the inner 20i terminated in the 2nd landing part 10。Such inner side tire shoulder transverse groove 20 is able to maintain that the rigidity of the 2nd higher landing part 10, and swimmingly the moisture film of the tread of the 2nd landing part 10 can be discharged to inner tread end Ti。
Inside 1st tire shoulder sipes per tire 21 by between inner 20i and the 2 major trough 4 of inner side tire shoulder transverse groove 20 in succession。In the present embodiment, the 2nd landing part 10 has bigger decorative pattern rigidity in tire equator C side。
Inside 2nd, tire shoulder sipes per tire 22 extends from the 2nd major trough 4 tyre surface end Ti side to the inside and terminates in the 2nd landing part 10。Inside such 2nd, tire shoulder sipes per tire 22 can absorb the moisture film of the 2nd landing part 10 and discharge to the 2nd major trough 4。Inside 2nd, tire shoulder sipes per tire 22 is not limited to such mode, for instance can also be the mode crossing the 2nd landing part 10。
Fig. 3 is the enlarged drawing of the 3rd landing part 11 to the 5th landing part 13。As it is shown on figure 3, in the 3rd landing part 11, cross the 3rd transverse groove 25 of the 3rd landing part 11, and the 1st sipes per tire 26 being configured between the 3rd transverse groove 25,25 that tire circumferential direction is adjacent is arranged alternately at tire circumferential direction。
3rd transverse groove 25 comprises from the outside tyre surface end To lateral part 27 extended, and is connected to lateral part 27 and the sipes per tire portion 28 connected with the 3rd major trough 5。Such 3rd transverse groove 25, owing to the water in lateral part 27 being discharged to outside tyre surface end To, therefore improves wetland performance。It addition, sipes per tire portion 28 maintains the tire circumferential direction rigidity of the 3rd higher landing part 11, therefore improve abrasion resistance properties。It addition, sipes per tire portion 28 absorbs the moisture film between the tread of road surface and the 3rd landing part 11, hence help to improve wetland performance。In this manual, " sipes per tire portion " is the width indentation shape less than 1.5mm。
In the present embodiment, lateral part 27 and sipes per tire portion 28 relative to tire axial towards inclined。Thus, it is suppressed that the rigidity at lateral part 27 with the 3rd landing part 11 at the crossover location place in sipes per tire portion 28 reduces。In the present embodiment, lateral part 27 and sipes per tire portion 28 are smoothly continuous。Such 3rd transverse groove 25 maintains the rigidity of the 3rd higher landing part 11。" smoothly continuous " refers to following state: form sipes per tire portion 28 between the dummy line 27c, the 27c that make groove edge 27e, 27e of both sides of lateral part 27 smoothly extend to the 3rd major trough 5 side。This definition can also use when the 4th transverse groove 29 described later and the 5th transverse groove 32。
Lateral part 27 and sipes per tire portion 28 arc-shaped ground extend。Thus, it is ensured that the draining opposing in groove is less, therefore wetland performance improves。
In the present embodiment, two ends 26e, 26i of the 1st sipes per tire 26 terminates and the lateral part 27 of the 1st sipes per tire the 26 and the 3rd transverse groove 25 is to inclined in the 3rd landing part 11。Such 1st sipes per tire 26 maintains the tire axial rigidity of the 3rd higher landing part 11。
The inner 26i of the 1st sipes per tire 26 is positioned at outside tire axial compared with the inner 27i of lateral part 27。That is, the 1st sipes per tire 26 does not repeat at tire axial with sipes per tire portion 28。Such 1st sipes per tire 26 maintains the decorative pattern rigidity of the tire equator C side of the 3rd bigger landing part 11, and contributes to making groove edge 27e, 27e opening and closing of the lateral part 27 of the 3rd transverse groove 25 when ground connection, discharges more water
In order to suppress the excessive reduction of the tire circumferential direction rigidity of the 3rd landing part 11, it is preferable that the tire axial length L5 of the 1st sipes per tire 26 is less than the tire axial length L4 of lateral part 27。More preferably the 65%～85% of the tire axial length L4 that tire axial length L5 is lateral part 27 of the 1st sipes per tire 26。
4th landing part 12 is provided with the 4th transverse groove 29 crossing the 4th landing part 12。4th transverse groove 29 comprises the lateral part 30 extended from the 3rd major trough 5 to the 4th major trough 6 side, and is connected to lateral part 30 and the sipes per tire portion 31 connected with the 4th major trough 6。Thus, in the 4th landing part 12, wetland performance is also made to improve with abrasion resistance properties。
Lateral part 30 and sipes per tire portion 31 relative to tire axial towards inclined。Thus, it is suppressed that the rigidity at lateral part 30 with the 4th landing part 12 at the crossover location place in sipes per tire portion 31 reduces。In the present embodiment, lateral part 30 and sipes per tire portion 31 are smoothly continuous。
Lateral part 30 and sipes per tire portion 31 arc-shaped ground extend。Thus, it is ensured that the draining opposing in groove is less, therefore wetland performance improves。
The lateral part 30 of the 4th transverse groove 29 is smoothly continuous via the sipes per tire portion 28 of the 3rd major trough the 5 and the 3rd transverse groove 25。Thus, suitably making the decorative pattern rigidity of the 3rd landing part 11 near the sipes per tire portion 28 of the 3rd transverse groove 25 diminish, the opening and closing in the sipes per tire portion 28 during ground connection becomes big therefore wetland performance and improves。" smoothly continuous " refers to following state: make the lateral part 30 of dummy line 28c and the 4 transverse groove 29 that the sipes per tire portion 28 of the 3rd transverse groove 25 extends to tire equator C side intersect。
In such present embodiment, it is not provided with vertical slit 17 in the 2nd landing part 10 to the 4th landing part 12。Thus, the 2nd landing part 10 to the 4th landing part 12 of the relatively larger transverse power of effect maintains bigger decorative pattern rigidity compared with the 1st landing part 9。It addition, utilize bigger cross force, the moisture film of the lower section of each landing part 10 to 12 is discharged by the 4th transverse groove 29 of the 3rd transverse groove the 25 and the 4th landing part 12 of inner side tire shoulder transverse groove the 20, the 3rd landing part 11 of the 2nd landing part 10 swimmingly to each tyre surface end Ti, To side。Therefore, improve the rigid balancing of the 1st to the 4th landing part 9 to 12 and can make to the cornering force convergence of vehicle outside and vehicle interior side homogeneous, and owing to being effectively discharged out moisture film, therefore maintain the control stability on dry pavement and turn performance on wet road surface is greatly improved。
5th landing part 13 is provided with the 5th transverse groove 32 crossing the 5th landing part 13。5th transverse groove 32 comprises the lateral part 33 extended from the 4th major trough 6, and is connected to lateral part 33 and the sipes per tire portion 34 connected with the 1st major trough 3。
Lateral part 33 and sipes per tire portion 34 relative to tire axial towards inclined。Thus, it is suppressed that the rigidity at lateral part 33 with the 5th landing part 13 at the crossover location place in sipes per tire portion 34 reduces。In the present embodiment, lateral part 33 and sipes per tire portion 34 are smoothly continuous。
The lateral part 33 of the 5th transverse groove 32 is smoothly continuous with the sipes per tire portion 31 of the 4th transverse groove 29 via the 4th major trough 6。Thus, making the decorative pattern rigidity of the 4th landing part 12 near the sipes per tire portion 31 of the 4th transverse groove 29 moderately diminish, the opening and closing in the sipes per tire portion 31 during ground connection becomes big, and therefore wetland performance improves。" smoothly continuous " refers to following state: make the lateral part 33 of dummy line 31c and the 5 transverse groove 32 that the sipes per tire portion 31 of the 4th transverse groove 29 extends to tire equator C side intersect。
5th landing part 13 is provided with the 6th transverse groove 35 extending from the 1st major trough 3 to the 4th major trough 6 side and terminating in the 5th landing part 13。Such 6th transverse groove 35 balancedly improves the decorative pattern rigidity of the tire axial both sides of the 5th landing part 13, and the abrasion convergence making the tire axial both sides of the 5th landing part 13 is homogeneous。
Above, embodiments of the present invention are described in detail, but the present invention has been not limited to embodiment illustrated, naturally can be deformed into various mode and implement。
[embodiment]
Manufacture experimently the passenger car pneumatic tire of size 215/60R17 of the motif with Fig. 1 based on the specification of table 1, and test their abrasion resistance properties, wetland performance。The main common specification of each on approbation tire, method of testing are as follows。
Tyre surface ground connection width TW:158mm
The groove depth of each major trough: 8.2mm
The maximum groove depth of the lateral part of the 3rd transverse groove: 6.6mm
The groove depth of each lateral part of the 4th and the 5th transverse groove: be 5.8mm
The groove depth in each sipes per tire portion: 4.0～5.5mm
The degree of depth of each sipes per tire: 4.0mm
The turn performance > of < control stability on dry pavement/on wet road surface
The all of passenger car that each test tire is installed on the front-wheel drive that capacity is 2400cc under the following conditions are taken turns, and test driver has been advanced at the test road of wet bituminous paving of the test road of dried asphalt road and the hydrops that is provided with the 6mm depth of water。Further, by the sense organ of test driver, the traveling characteristics about steering wheel response now, curving, pull strength and earth-grasping force etc. has been evaluated。To set embodiment 1 as scoring 100 to represent result。Numerical value is the bigger the better。Numerical difference 10 submeter shows there is significant performance change between the two, differs from 5 submeters and shows there is obvious performance change between the two。Differ from less than the 3 points differences being difficult to discover degree for co-driver。
Wheel rim (all take turns): 7.0J × 17
Intrinsic pressure (all take turns): 240kPa
Table 1 represents the result etc. of test。
Table 1
The result of test, it is thus identified that the tire of embodiment, compared with the tire of comparative example 1, maintains the control stability on dry pavement and the turn performance on wet road surface improves about 10 points。Even if it addition, when making tire size change, also showing the tendency identical with this test result。
Claims (8)
1. a pneumatic tire, this pneumatic tire has fetus face, it is characterised in that
Described fetus face is provided with multiple major trough extended continuously at tire circumferential direction,
Described major trough comprises the 1st major trough and the 2nd major trough, and the 2nd major trough is adjacent with described 1st major trough and is arranged at outside tire axial compared with described 1st major trough,
It is formed with the 1st landing part between described 1st major trough and described 2nd major trough,
It is provided with in described 1st landing part
1st transverse groove, the 1st transverse groove extends from described 1st major trough and has the inner terminated in described 1st landing part；
2nd transverse groove, the 2nd transverse groove extends from described 2nd major trough and has the inner terminated in described 1st landing part；And
Vertical slit, this vertical slit connects with described 2nd transverse groove and the two ends of this vertical slit terminate in described 1st landing part,
More than the 50% of the tire axial Breadth Maximum that tire axial length is described 1st landing part of described 2nd transverse groove。
2. pneumatic tire according to claim 1, it is characterised in that
Described fetus face has asymmetric decorative pattern, this asymmetric decorative pattern specify to vehicle install towards,
Described asymmetric decorative pattern comprises the inner tread end being positioned at vehicle interior side when tire is installed to vehicle,
Described 2nd major trough is arranged at the side near inner tread end。
3. the pneumatic tire according to claim 1 or 2, it is characterised in that
Described 1st transverse groove and described 2nd transverse groove tilt relative to tire axial。
4. pneumatic tire according to claim 3, it is characterised in that
Described 1st transverse groove and described 2nd transverse groove are mutually towards inclined。
5. pneumatic tire according to any one of claim 1 to 4, it is characterised in that
Described 1st transverse groove is alternately arranged on tire circumferential direction with described 2nd transverse groove,
The described inner of described 1st transverse groove that the two ends of described vertical slit are not adjacent with on tire circumferential direction connects but positioned adjacent。
6. pneumatic tire according to any one of claim 1 to 5, it is characterised in that
Described vertical slit extends along tire circumferential direction。
7. pneumatic tire according to any one of claim 1 to 6, it is characterised in that
The groove depth of described vertical slit is 1～2mm。
8. pneumatic tire according to any one of claim 1 to 6, it is characterised in that
In the groove width that groove width is each described major trough of described 2nd major trough maximum。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014249190A JP6126571B2 (en) | 2014-12-09 | 2014-12-09 | Pneumatic tire |
| JP2014-249190 | 2014-12-09 |
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| CN105691112A true CN105691112A (en) | 2016-06-22 |
| CN105691112B CN105691112B (en) | 2017-09-29 |
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| CN201510829993.8A Active CN105691112B (en) | 2014-12-09 | 2015-11-25 | Pneumatic tire |
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| JP (1) | JP6126571B2 (en) |
| CN (1) | CN105691112B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6711169B2 (en) * | 2016-06-24 | 2020-06-17 | 住友ゴム工業株式会社 | tire |
| JP6946923B2 (en) * | 2017-10-19 | 2021-10-13 | 横浜ゴム株式会社 | Pneumatic tires |
| JP7069793B2 (en) * | 2018-02-14 | 2022-05-18 | 横浜ゴム株式会社 | Pneumatic tires |
| JP7095370B2 (en) | 2018-04-06 | 2022-07-05 | 住友ゴム工業株式会社 | tire |
| JP7187903B2 (en) * | 2018-09-04 | 2022-12-13 | 横浜ゴム株式会社 | pneumatic tire |
| WO2021210521A1 (en) | 2020-04-17 | 2021-10-21 | ファナック株式会社 | Machine tool |
| US20230125142A1 (en) * | 2021-10-26 | 2023-04-27 | Sumitomo Rubber Industries, Ltd. | Tire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5616194A (en) * | 1993-09-20 | 1997-04-01 | Kumho & Co., Inc. | Pneumatic radial tire having a tread pattern |
| JP2013071633A (en) * | 2011-09-28 | 2013-04-22 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2013180637A (en) * | 2012-03-01 | 2013-09-12 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| DE102012108384A1 (en) * | 2012-09-10 | 2014-03-13 | Continental Reifen Deutschland Gmbh | Vehicle tires |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3949939B2 (en) * | 2001-11-14 | 2007-07-25 | 住友ゴム工業株式会社 | Pneumatic tire |
| US20110079334A1 (en) * | 2009-10-02 | 2011-04-07 | Andreas Bott | Tire tread having improved contact pressure distribution |
| JP5118742B2 (en) * | 2010-11-30 | 2013-01-16 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5592783B2 (en) * | 2010-12-29 | 2014-09-17 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5695476B2 (en) * | 2011-04-12 | 2015-04-08 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5659129B2 (en) * | 2011-11-21 | 2015-01-28 | 株式会社ブリヂストン | tire |
| JP5803859B2 (en) * | 2012-09-06 | 2015-11-04 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5873457B2 (en) * | 2013-04-12 | 2016-03-01 | 住友ゴム工業株式会社 | Pneumatic tire |
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- 2014-12-09 JP JP2014249190A patent/JP6126571B2/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5616194A (en) * | 1993-09-20 | 1997-04-01 | Kumho & Co., Inc. | Pneumatic radial tire having a tread pattern |
| JP2013071633A (en) * | 2011-09-28 | 2013-04-22 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2013180637A (en) * | 2012-03-01 | 2013-09-12 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| DE102012108384A1 (en) * | 2012-09-10 | 2014-03-13 | Continental Reifen Deutschland Gmbh | Vehicle tires |
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| CN105691112B (en) | 2017-09-29 |
| JP2016107912A (en) | 2016-06-20 |
| JP6126571B2 (en) | 2017-05-10 |
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