CN104364090A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN104364090A CN104364090A CN201380029217.9A CN201380029217A CN104364090A CN 104364090 A CN104364090 A CN 104364090A CN 201380029217 A CN201380029217 A CN 201380029217A CN 104364090 A CN104364090 A CN 104364090A
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- Prior art keywords
- mentioned
- rib
- circumferential
- stria
- groove
- Prior art date
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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
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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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
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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
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
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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
- B60C11/04—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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C11/125—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern arranged at the groove bottom
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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
- B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
- B60C2011/0016—Physical properties or dimensions
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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
- B60C2011/0348—Narrow grooves, i.e. having a width of less than 4 mm
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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
- B60C2011/0362—Shallow grooves, i.e. having a depth of less than 50% of other grooves
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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
- B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane 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
- B60C2011/0358—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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- 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
- B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
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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
- B60C2011/0381—Blind or isolated grooves
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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
- B60C2011/0386—Continuous ribs
- B60C2011/039—Continuous ribs provided at the shoulder portion
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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
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/133—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising recesses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
In order to improve uneven wear resistance and wet road performance, a pneumatic tire comprises: a circumferential narrow groove (5) that is formed with a groove depth shallower than a circumferential main groove (3) and extends in the tire circumferential direction and within a range of 40 to 60 [%] of the tire width direction measurement of a lateral rib (41) from one side of the lateral rib in the tire width direction, where a center main groove (31) is the center circumferential main groove when there is an odd number of circumferential main grooves, and the lateral rib is a rib (4) adjacent to either side of the center main groove in the tire width direction; a tire-width direction narrow groove (6), a plurality of which are disposed in the tire circumferential direction, that is formed with a groove depth shallower than the circumferential main groove and is provided extending in the lateral rib while intersecting with the tire circumferential direction, with one end linked to and terminating in a circumferential main groove that is adjacent to the lateral rib on the exterior side in the tire width direction and the other end passing through the circumferential narrow groove and terminating within the lateral rib; and a circumferential groove bottom sipe (7) formed in the bottom of the circumferential narrow groove along the direction in which the circumferential narrow groove extends.
Description
Technical field
The present invention relates to a kind of air-inflation tyre possessing resistance to partial wear performance and wet road performance.
Background technology
The pickup truck air-inflation tyre etc. that JATMA specifies is mainly used in local traveling, can loiter during middle low speed driving repeated multiple timesly, therefore, requires that it possesses excellent resistance to partial wear performance and earth-grasping force (wet road performance).
In the past, the air-inflation tyre is such as, described in patent documentation 1 provided with altogether three grooves at fetus face: 1 central circumferential slot on tire equator face and a pair side circumferential slot laid respectively between this central circumferential slot and two tyre surface ends.By these circumferential slots, divide formation 4 row rib.Rib between central authorities' circumferential slot and side circumferential slot be provided with from central circumferential slot along and the direction that intersects of tire circumference extends many translots, be communicated to this translot and along tire circumferential extend the first stria portion, the first traverse furrow groove being communicated to the first stria portion, be communicated to the first traverse furrow groove and along circumferential the second stria portion extended of tire and the second traverse furrow groove being communicated to the second stria portion and translot.
In addition, in the past relative to the air-inflation tyre of above-mentioned patent documentation 2, air-inflation tyre described in patent documentation 2 and then be provided with one end at circumferential slot place, side opening, the other end is communicated with the second stria portion and lasts till the first traverse furrow groove, relative to the inclined groove that extends of tire equator face tilt ground.
In addition, air-inflation tyre described in previous patent document 3, it marks off rib-like land portion respectively between 3 circumferential major troughs of fetus face setting, the Width groove this rib-like land portion arranging 1 secondary groove of circumference and carries out being communicated with between circumferential major trough and the secondary groove of circumference, divides, forms block land portion.
Prior art document
Patent documentation
[patent documentation 1] Japanese Patent Laid-Open 2010-12965 publication
[patent documentation 2] Japanese Patent Laid-Open 2010-149761 publication
[patent documentation 3] Japanese Patent Laid-Open 2012-86755 publication
Summary of the invention
The problem that invention quasi-solution is determined
Air-inflation tyre described in above-mentioned patent documentation 1 ~ patent documentation 3 is provided with circumferential secondary groove (the first stria portion and the second stria portion) in rib-like land portion (rib), and be provided with the Width groove (translot) that this circumferential secondary groove (the first stria portion and the second stria portion) is communicated with the circumferential major trough (central circumferential slot) of central authorities, divide in the tire width direction both sides of the circumferential slot (central circumferential slot) of central authorities, form block land portion.This air-inflation tyre described in patent documentation 1 ~ patent documentation 3 marks off block land portion in the tire width direction both sides of the circumferential slot (central circumferential slot) of central authorities, the rigidity of this part is reduced, therefore, when being mainly used in local traveling, loitering repeatedly due to during middle low speed driving, easily there is premature wear (central authorities' wearing and tearing) in the middle section of fetus face.That is, the requirement meeting resistance to partial wear performance is difficult to.
The present invention develops to form in view of the above problems, and its object is to provides a kind of air-inflation tyre that can improve resistance to partial wear performance and wet road performance.
For the technological means of technical solution problem
In order to solve the problem, realize object of the present invention, the air-inflation tyre of the first invention, it is by least 3 circumferential major troughs along the extension of tire circumference, form at least 4 the rib-like lands portion extended along tire circumference, it is characterized in that, when above-mentioned circumferential major trough is odd number bar, with the above-mentioned circumferential major trough of central authorities for central major trough, when above-mentioned circumferential major trough is even number bar, using 2 of center side each above-mentioned circumferential major troughs in the lump as central major trough, using with the tire width direction two of above-mentioned central major trough outside adjacent rib-like land portion as rib-like land, side portion time, comprise: circumferential stria, it is from the tire width direction side in rib-like land portion, above-mentioned side, be more than or equal to this rib-like land, side portion tire width direction size 40%, be less than or equal in the scope of 60%, extend along tire circumference, and the groove depth formed is more shallow than above-mentioned circumferential major trough, Width stria, it is configured with multiple in tire circumference, be arranged in rib-like land portion, above-mentioned side, one end be communicated to the tire width direction in rib-like land portion, above-mentioned side outside adjacent circumferential major trough end at this circumferential major trough, the other end runs through above-mentioned circumferential stria and intersection extension in tire circumference while ending in rib-like land portion, above-mentioned side, and the groove depth formed is more shallow than above-mentioned circumferential major trough, and circumferential slot cunette groove, it is formed along the bearing of trend of this circumferential stria at the bottom land of above-mentioned circumferential stria, wherein make with inside the tire width direction in the above-mentioned circumferential stria rib-like land portion, above-mentioned side that is boundary for rib-like, make with outside the tire width direction in the above-mentioned circumferential stria rib-like land portion, above-mentioned side that is boundary for bulk.
According to this air-inflation tyre, under the effect of circumferential stria, there is tire circumference drainage, under the effect of Width stria, have to the drainage outside tire width direction, thus wet road performance (road-holding property and braking ability at wet-skid road surface) can be improved.In addition, inside the tire width direction in rib-like land, side portion, (central major trough side) is rib-like, thus unnecessary rigidity can be suppressed to reduce, and improves resistance to partial wear performance.Especially, when being mainly used in local traveling, the fetus face middle section generation premature wear (central authorities' wearing and tearing) caused owing to loitering repeatedly during middle low speed driving can be suppressed.In addition, by circumferential stria being arranged on 40% of the tire width direction size being more than or equal to rib-like land, side portion, being less than or equal to the scope of 60%, the i.e. substantial middle place of tire width direction, the poor rigidity of rib-like land, side portion on tire width direction diminishes, and therefore can suppress partial wear.Further, the groove depth that circumferential stria is formed is more shallow than circumferential major trough, circumferential slot cunette groove can be utilized to fill up this groove depth poor, thus the rigidity of the rib-like in rib-like land, side portion can be made to keep evenly on tire width direction, suppresses partial wear.Consequently can improve resistance to partial wear performance and wet road performance.
In addition, the air-inflation tyre of the second invention is characterised in that, in the first invention, and then comprises Width bottom land groove, and it is formed along the bearing of trend of this Width stria at the bottom land of above-mentioned Width stria.
According to this air-inflation tyre, the groove depth that Width stria is formed is more shallow than circumferential major trough, Width bottom land groove can be utilized to fill up this groove depth poor, thus the block rigidity in rib-like land, side portion can be made to keep evenly on tire width direction and tire circumference, suppress partial wear.Consequently can obtain the effect significantly improving resistance to partial wear performance.
In addition, the air-inflation tyre of the 3rd invention is characterised in that, in the first or second invention, and then comprises tread groove, and it is from the other end of above-mentioned Width stria, extends, end in rib-like land portion, above-mentioned side in above-mentioned central major trough side.
According to this air-inflation tyre, rib-like inside the tire width direction in rib-like land, side portion makes the other end of Width stria stop, start from here to extend tread groove, thus the resistance to partial wear performance of the rib-like in rib-like land, side portion can be maintained, and promote drainage further, improve wet road performance.
In addition, the air-inflation tyre of the 4th invention is characterised in that, second or the 3rd in invention, deducts cross part when above-mentioned Width stria runs through above-mentioned circumferential stria, forms above-mentioned Width bottom land groove.
Cross part when circumferential stria runs through for Width stria, if Width bottom land groove runs through this cross part, then near bulk and the rib-like rigidity meeting local reduction of the part of cross part, therefore, deduct this part to arrange the rigidity that Width bottom land groove can suppress rib-like land, side portion unnecessary and reduce, improve resistance to partial wear performance.
In addition, the air-inflation tyre of the 5th invention is characterised in that, in the arbitrary invention in the second to the 4th invention, is communicated with above-mentioned tread groove, forms above-mentioned Width bottom land groove.
According to this air-inflation tyre, Width bottom land groove is communicated with tread groove, significantly can obtains the effect of above-mentioned tread groove.That is, the resistance to partial wear performance of the rib-like in rib-like land, side portion can be maintained, and drainage can be promoted further, improve wet road performance.
In addition, the air-inflation tyre of the 6th invention is characterised in that, in the arbitrary invention in the first to the 5th invention, the maximum groove depth of above-mentioned groove from above-mentioned tyre surface is set to be more than or equal to above-mentioned circumferential major trough groove depth 60%, the scope be less than or equal under 90%.
According to this air-inflation tyre, being more than or equal to 60% of the maximum groove depth of circumferential major trough by the maximum groove depth of groove from tyre surface being set to, the effect significantly improving drainage can be obtained; Be set to and be less than or equal to 90%, can obtain and make the rib-like in rib-like land, side portion and block rigidity keep uniform remarkable result on tire width direction and tire circumference.Its result is, can obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance.
In addition, the air-inflation tyre of the 7th invention is characterised in that, in the arbitrary invention in the first to the 6th invention, be bent to form above-mentioned Width stria along each linear components, and described linear components at least has two angles relative to tire circumference.
According to this air-inflation tyre, form Width stria along linear components, so can obtain the effect significantly improving drainage, more can improve wet road performance.
In addition, the air-inflation tyre of the 8th invention is characterised in that, in arbitrary invention in the first to the 7th invention, above-mentioned Width stria is formed as, the end side groove width W1 being communicated to above-mentioned circumferential major trough and the wide W2 of other end side channel ending at rib-like land portion, above-mentioned side meets the relation of W2<W1, and at one end changes groove width gradually between side and another side.
According to this air-inflation tyre, the end side groove width W1 that above-mentioned Width stria is communicated to circumferential major trough is greater than the wide W2 of other end side channel ending at rib-like land, side portion, and at one end change groove width gradually between side and another side and formed, therefore can improve the drainage from rib-like land, side portion to circumferential major trough side.
In addition, the air-inflation tyre of the 9th invention is characterised in that, in arbitrary invention in the first to the 8th invention, the maximum groove depth of above-mentioned circumferential stria and above-mentioned Width stria is set to and is more than or equal to 10% of above-mentioned circumferential major trough groove depth, is less than or equal to the scope of 40%.
According to this air-inflation tyre, if the maximum groove depth of circumferential stria and Width stria is be more than or equal to circumferential major trough groove depth 10%, then more can play drainage, obtain the effect significantly improving wet road performance.In addition, if the maximum groove depth of circumferential stria and Width stria is be less than or equal to circumferential major trough groove depth 40%, then the rigidity in rib-like land, side portion can be suppressed further to reduce, obtain the effect significantly improving resistance to partial wear performance.Consequently can obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance.
In addition, the air-inflation tyre of the tenth invention is characterised in that, in arbitrary invention in the first to the 9th invention, the groove width of above-mentioned central major trough be more than or equal to tire equator face to ground terminal tire width direction size 3%, be less than or equal to 15% scope, the position that each above-mentioned circumferential major trough distance tire equator face in rib-like land portion, above-mentioned side is therebetween set relative to above-mentioned central major trough be more than or equal to tire equator face to ground terminal tire width direction size 50%, be less than or equal to 60% scope.
Tire easily with the tire width direction center side of tyre surface for starting point, occur water skiing (hydroplaning) phenomenon.Therefore, according to this air-inflation tyre, the central major trough groove width being configured at tire width direction center side is specified, and by with the tire width direction of central major trough outside the position of adjacent circumferential major trough be configured in tire width direction center side, the drainage of tire width direction center side can be improved, thus further can improve wet road performance.
In addition, the air-inflation tyre of the 11 invention is characterised in that, in the arbitrary invention in the first to the tenth invention, tire width direction outermost rib-like land portion do not configure be more than or equal to above-mentioned circumferential major trough groove depth 10% stria and groove.
According to this air-inflation tyre, tire width direction outermost rib-like land portion does not configure be more than or equal to circumferential major trough groove depth 10% stria and groove, thus the more significant effect improving resistance to partial wear performance can be obtained.
In addition, the air-inflation tyre of the 12 invention is characterised in that, in the arbitrary invention in the first to the 11 invention, the JIS hardness of sizing material at 20 DEG C forming above-mentioned fetus face is the scope being more than or equal to 60, being less than or equal to 75.
According to this air-inflation tyre, by making the JIS hardness of the sizing material of formation fetus face at 20 DEG C for being more than or equal to 60, can be obtained by suitable hardness and significantly improve the effect of resistance to partial wear performance and significantly improve the effect of wet road performance.
In addition, the air-inflation tyre of the 13 invention is characterised in that, in the arbitrary invention in the first to the 12 invention, it is applicable to be pressed in the pickup truck air-inflation tyre being less than or equal to 600kPa in regulation.
According to this air-inflation tyre, because it is mainly used in local traveling, can loiter during middle low speed driving repeated multiple timesly, therefore, require that it possesses excellent resistance to partial wear performance and earth-grasping force (wet road performance).According to this air-inflation tyre, as being mainly used in the local pickup truck air-inflation tyre travelled, excellent resistance to partial wear performance and the requirement of earth-grasping force can be met.
Invention effect
The air-inflation tyre that the present invention is correlated with can improve resistance to partial wear performance and wet road performance.
Accompanying drawing explanation
Fig. 1 is the airtyred planar view that embodiment of the present invention is relevant.
Fig. 2 is the planar view of other examples airtyred that embodiment of the present invention is correlated with.
Fig. 3 is the airtyred partial magnified sectional view shown in Fig. 1 and Fig. 2.
Fig. 4 is the airtyred part amplification view shown in Fig. 1 and Fig. 2.
Fig. 5 is the chart representing the airtyred performance test results that the embodiment of the present invention is correlated with.
Fig. 6 is the chart representing the airtyred performance test results that the embodiment of the present invention is correlated with.
Fig. 7 is the chart representing the airtyred performance test results that the embodiment of the present invention is correlated with.
Fig. 8 is the chart representing the airtyred performance test results that the embodiment of the present invention is correlated with.
Detailed description of the invention
Below, embodiments of the present invention are described in detail with reference to the accompanying drawings.In addition, the present invention is not limited to this embodiment.In addition, the inscape of present embodiment comprise relevant industry personnel can and easily displacement or content identical in fact.In addition, combination in any in the scope that the multiple modification recorded in present embodiment can be understood relevant industry personnel.
Fig. 1 and Fig. 2 is the airtyred planar view that present embodiment is relevant, and Fig. 3 is the airtyred partial magnified sectional view shown in Fig. 1 and Fig. 2, and Fig. 4 is the airtyred part amplification view shown in Fig. 1 and Fig. 2.
In below illustrating, tire radial direction refers to the direction orthogonal with the S. A. of air-inflation tyre 1 (not shown), tire radial direction inner side refers to the side towards S. A. in tire radial direction, and tire radial outside refers to the side away from S. A. in tire radial direction.In addition, tire width direction refers to the direction parallel with described S. A., refer to the side towards tire equator face (tire equator line) CL on tire width direction inside tire width direction, outside tire width direction, refer to the side away from tire equator face CL on tire width direction.In addition, tire circumference refers to the circumferencial direction of axle centered by above-mentioned S. A..In addition, tire equator face CL refers to the rotating shaft direct cross with air-inflation tyre 1, simultaneously by the plane at the tyre width center of air-inflation tyre 1.Tire equator line refers to and to be positioned on the CL of tire equator face and along the line of air-inflation tyre 1 circumference.In present embodiment, the symbol " CL " identical with tire equator face to tire equator wire tag.
As shown in Figures 1 and 2, the air-inflation tyre 1 of present embodiment has fetus face 2.Fetus face 2 is made up of elastomeric material, exposes in the tire outermost radial outside of air-inflation tyre 1, and its surface, as tyre surface 2a, forms the profile of air-inflation tyre 1.
In addition, the fetus face 2 of the air-inflation tyre 1 of present embodiment, on tyre surface 2a, tire width direction is provided with at least 3 circumferential major troughs 3 (being 3 in Fig. 1, is 4 in Fig. 2) extended along tire circumference side by side.Further, fetus face 2, on tyre surface 2a, by least 3 circumferential major troughs 3, is formed with at least 4 rib-like land portions 4 (being 4 in Fig. 1, is 5 in Fig. 2) extended along tire circumference.In addition, in the air-inflation tyre 1 of present embodiment, the tread contour of above-mentioned tyre surface 2a is preferably with tire equator face CL for boundary, the monosymmetric symmetrical tread contour of tire width direction.Symmetrical tread contour represents that when turning on tire width direction, tread contour is identical shape.Symmetrical tread contour comprises with tire equator face CL for boundary, phase deviation person in tire circumference.
Further, in the present embodiment, as shown in Figure 1, when circumferential major trough 3 is odd number bar, be central major trough 31 (in Fig. 1, the circumferential major trough 3 of central authorities is positioned on the CL of tire equator face) with the circumferential major trough 3 of central authorities.In addition, as shown in Figure 2, when circumferential major trough 3 is even number bar, using 2 of center side (outside tire width direction two) each circumferential major troughs 3 in the lump as central major trough 31.In addition, though do not express in figure, when circumferential major trough 3 is 5, because circumferential major trough 3 is odd number bar, so be central major trough 31 with the circumferential major trough 3 of central authorities.Further, using with the tire width direction two of above-mentioned each central major trough 31 outside adjacent rib-like land portion 4 as rib-like land, side portion 41.
Rib-like land, side portion 41 is formed with the groove width circumferential stria 5 narrower than circumferential major trough 3 and Width stria 6.In rib-like land, side portion 41, circumferential stria 5, from the side of tire width direction, is more than or equal to 40% of the tire width direction size W in this rib-like land, side portion 41, is less than or equal in the scope of 60%, extends along tire circumference, arranges.The groove depth D2 (with reference to figure 3) that this circumferential stria 5 is formed is shallower than the groove depth D1 (with reference to figure 3) of circumferential major trough 3.In addition, Width stria 6 is configured with multiple in tire circumference, it is in rib-like land, side portion 41, one end be communicated to the tire width direction in rib-like land, side portion 41 outside adjacent circumferential major trough 3 end at this circumferential major trough 3, the other end runs through circumferential stria 5 and intersects in tire circumference while ending in rib-like land, side portion 41 and extends, arranges.The groove depth D3 (with reference to figure 3) that this Width stria 6 is formed is shallower than the groove depth D1 (with reference to figure 3) of circumferential major trough 3.
Here, in the air-inflation tyre 1 of present embodiment, the groove depth D1 of circumferential major trough 3 is set to the scope being more than or equal to 7mm, being less than or equal to 12mm, groove width is set to the scope being more than or equal to 8mm, being less than or equal to 14mm.In addition, by the scope that groove depth D2, the D3 of circumferential stria 5 and Width stria 6 are set to afore mentioned rules, groove width is set to the scope being more than or equal to 2mm, being less than or equal to 4mm.
Then, rib-like land, side portion 41 is by circumferential stria 5 and Width stria 6, (central major trough 31 side) inside the tire width direction that is boundary with circumferential stria 5 is formed as rib-like, utilize multiple Width stria 6, be formed as block by outside the tire width direction that is boundary with circumferential stria 5.
In addition, circumferential stria 5 is formed with circumferential slot cunette groove 7 at its bottom land.Circumferential slot cunette groove 7 is formed from the bottom land of circumferential stria 5 towards tire radial direction inner side, and circumferentially the bearing of trend (tire circumference) of stria 5 extends, arranges.The groove width of circumferential slot cunette groove 7 is set to and is less than or equal to 1.0mm.In addition, in the diagram, circumferential slot cunette groove 7 is formed at the central authorities of circumferential stria 5.But be not limited thereto, though do not express in figure, circumferential slot cunette groove 7 also can the cell wall of circumferentially stria 5, is formed towards tire radial direction inner side.In addition, when the cell wall of circumferential slot cunette groove 7 circumferentially stria 5 is formed, can be formed on any one or two in two cell walls of circumferential stria 5.
According to this air-inflation tyre 1, under the effect of circumferential stria 5, there is tire circumference drainage, under the effect of Width stria 6, have to the drainage outside tire width direction, thus wet road performance (road-holding property and braking ability at wet-skid road surface) can be improved.In addition, inside the tire width direction in rib-like land, side portion 41, (central major trough 31 side) is rib-like, thus unnecessary rigidity can be suppressed to reduce, and improves resistance to partial wear performance.Especially, when being mainly used in local traveling, the middle section generation premature wear (central authorities' wearing and tearing) due to the fetus face 2 caused that loiters repeatedly during middle low speed driving can be suppressed.In addition, by circumferential stria 5 being arranged 40% of the tire width direction size be more than or equal in rib-like land, side portion 41, being less than or equal to the scope of 60%, the i.e. substantial middle place of tire width direction, the poor rigidity of rib-like land, side portion 41 on tire width direction diminishes, and therefore can suppress partial wear.Further, the groove depth that circumferential stria 5 is formed more shallow than circumferential major trough 3, can utilize circumferential slot cunette groove 7 to fill up this groove depth poor, thus the rigidity of the rib-like in rib-like land, side portion 41 can be made to keep evenly on tire width direction, suppresses partial wear.Its result is for can improve resistance to partial wear performance and wet road performance.
In addition, this air-inflation tyre 1 preferably has symmetrical tread contour, can all around exchange in rotary course, thus can make even wearing, obtains longer service life.
In addition, as shown in Figures 3 and 4, the air-inflation tyre 1 of present embodiment is formed with Width bottom land groove 8 at the bottom land of Width stria 6.The bottom land of Width bottom land groove 8 stria 6 is in the width direction formed towards tire radial direction inner side, and the bearing of trend of broad ways stria 6 is arranged.The groove width of Width bottom land groove 8 is set to and is less than or equal to 1.0mm.In addition, in the diagram, Width bottom land groove 8 is formed at the bottom land central authorities of Width stria 6.But be not limited thereto, though do not express in figure, Width bottom land groove 8 also can broad ways stria 6 cell wall formed.In addition, when the cell wall of Width bottom land groove 8 broad ways stria 6 is formed, can be formed on any one or two in two cell walls of Width stria 6.
According to this air-inflation tyre 1, the groove depth that Width stria 6 is formed more shallow than circumferential major trough 3, Width bottom land groove 8 can be utilized to fill up this groove depth poor, thus the block rigidity in rib-like land, side portion 41 can be made to keep evenly on tire width direction and tire circumference, suppress partial wear.Its result is to obtain the effect significantly improving resistance to partial wear performance.
In addition, as shown in Figures 3 and 4, the air-inflation tyre 1 of present embodiment is formed with tread groove 9, and the other end of its stria 6 in the width direction starts, and extends, end in rib-like land, side portion 41 in central major trough 31 side.The bearing of trend of tread groove 9 broad ways stria 6 on one end is arranged.The groove width of tread groove 9 is set to and is less than or equal to 1.0mm.
According to this air-inflation tyre 1, rib-like inside the tire width direction in rib-like land, side portion 41 makes the other end of Width stria 6 stop, start from here to extend tread groove 9, thus the resistance to partial wear performance of the rib-like in rib-like land, side portion 41 can be maintained, and promote drainage further, improve wet road performance.Tread groove 9 can broad ways stria 6 the other end bearing of trend formed, the bearing of trend that also can depart from the other end of Width stria 6 is formed, but the bearing of trend of the other end of broad ways stria 6 is formed and can promote drainage further.In addition, in order to obtain above-mentioned remarkable result, tread groove 9 flute length that preferably an end of stria 6 extends in the width direction is more than or equal to 2mm and is less than or equal to 8mm.
In addition, as shown in Figure 4, the air-inflation tyre 1 of present embodiment cross part X when preferably deduction Width stria 6 runs through circumferential stria 5, forms Width bottom land groove 8.
Cross part X when circumferential stria 5 runs through for Width stria 6, if Width bottom land groove 8 runs through this cross part, then near bulk and the rib-like rigidity meeting local reduction of the part of cross part X, therefore, deduct this part to arrange the rigidity that Width bottom land groove 8 can suppress rib-like land, side portion 41 unnecessary and reduce, improve resistance to partial wear performance.In addition, in order to suppress to reduce near the bulk of the part of cross part X and the local of rib-like rigidity, more preferably cross part X-shaped bottom land groove 7 is circumferentially deducted.
In addition, as shown in Figure 3, the air-inflation tyre 1 preferable width direction bottom land groove 8 of present embodiment is connected to form with tread groove 9.
According to this air-inflation tyre 1, Width bottom land groove 8 is communicated with tread groove 9, significantly can obtains the effect of above-mentioned tread groove 9.That is, the resistance to partial wear performance of the rib-like in rib-like land, side portion 41 can be maintained, and drainage can be promoted further, improve wet road performance.
In addition, as shown in Figure 3, above-mentioned groove (circumferential slot cunette groove 7, Width bottom land groove 8, tread groove 9) the maximum groove depth D4 from tyre surface 2a, D5, D6 are preferably set to 60% of the groove depth D1 being more than or equal to circumferential major trough 3, are less than or equal to the scope of 90% by the air-inflation tyre 1 of present embodiment.
Make the maximum groove depth D4 of above-mentioned groove 7,8,9 from tyre surface 2a, D5, D6 be 60% of the maximum groove depth D1 being more than or equal to circumferential major trough 3, the effect significantly improving drainage can be obtained; Be set to and be less than or equal to 90%, can obtain and make the rib-like in rib-like land, side portion 41 and block rigidity keep uniform remarkable result on tire width direction and tire circumference.Its result is to obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance.In addition, in order to obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance, more preferably the maximum groove depth D4 of groove 7,8,9 from tyre surface 2a, D5, D6 being set to 70% of the maximum groove depth D1 being more than or equal to circumferential major trough 3, being less than or equal to the scope of 80%.
In addition, as shown in Figure 4, the air-inflation tyre 1 of present embodiment is preferably bent to form Width stria 6 along each linear components, and described linear components at least has two angles (α, β) relative to tire circumference.
According to this air-inflation tyre 1, form Width stria 6 along linear components, the effect significantly improving drainage can be obtained, more can improve wet road performance.
In addition, as shown in Figure 4, Width stria 6 is bent to form along each linear components α 1, β 1, and described linear components α 1, β 1 have two angle [alpha], β relative to tire circumference.In order to improve drainage, angle [alpha], the β of linear components α 1, β 1 are preferably circumferential relative to tire for being more than or equal to 30 °.In order to improve drainage further, continuous print linear components α 1, β 1 its angle [alpha] preferred, β are towards same direction, circumferential relative to tire for being more than or equal to 30 °, being less than or equal to 90 °.In order to improve drainage further, the differential seat angle of continuous print linear components α 1, β 1 its angle [alpha] preferred, β is for being more than or equal to 10 °, being less than or equal to 40 °.In order to improve from tire circumference towards the drainage of tire width direction in tire rotation process, the angle [alpha] outside the preferred tire width direction of linear components α 1, β 1 of continuous print and the relation between the angle beta inside tire width direction meet β < α.If the quantity of linear components (quantity of angle) increases, then can close to arc-shaped, therefore in order to improve drainage, under the quantity (quantity of angle) of linear components is preferably greater than and equals 2, is less than or equal to 4.
In addition, as shown in Figure 4, the Width stria 6 of the air-inflation tyre 1 of present embodiment is preferably formed to, the end side groove width W1 being communicated to circumferential the major trough 3 and wide W2 of other end side channel ending at rib-like land, side portion 41 meets the relation of W2<W1, and at one end changes groove width gradually between side and another side.
According to this air-inflation tyre 1, the end side groove width W1 that Width stria 6 is communicated to circumferential major trough 3 is greater than the wide W2 of other end side channel ending at rib-like land, side portion 41, and at one end change groove width gradually between side and another side and formed, therefore can improve the drainage from rib-like land, side portion 41 to circumferential major trough 3 side.
In addition, in order to improve drainage, the ratio W2/W1 of the wide W2 of other end side channel preferably ending at rib-like land, side portion 41 and the end side groove width W1 being communicated to major trough is for being more than or equal to 0.7, being less than or equal to 0.9.In addition, in tyre surface 2a, the end side groove width W1 being communicated to the Width stria 6 of circumferential major trough 3 is the shortest distance between the intersection point pitched of the virtual lines intersects of the edge of opening of the circumferential major trough 3 be communicated with broad ways stria 6 along each dummy line of two edge of opening on the bearing of trend of Width stria 6.When the part that Width stria 6 is communicated to circumferential major trough 3 is formed with chamfered section 10, ignore chamfered section 10.On the other hand, in tyre surface 2a, the wide W2 of other end side channel ending at the Width stria 6 in rib-like land, side portion 41 be on the bearing of trend of Width stria 6, leave Width stria 6 along each dummy line of two edge of opening part between shortest distance.When the other end of Width stria 6 stops with arc-shaped, refer to the shortest distance between circular arc flex point.
In addition, as shown in Figure 3, maximum groove depth D2, the D3 of circumferential stria 5 and Width stria 6 are preferably set to 10% of the groove depth D1 being more than or equal to circumferential major trough 3, are less than or equal to the scope of 40% by the air-inflation tyre 1 of present embodiment.
According to this air-inflation tyre 1, if maximum groove depth D2, the D3 of circumferential stria 5 and Width stria 6 are 10% of the groove depth D1 being more than or equal to circumferential major trough 3, then more can play drainage, obtain the effect significantly improving wet road performance.In addition, if maximum groove depth D2, the D3 of circumferential stria 5 and Width stria 6 are 40% of the groove depth D1 being less than or equal to circumferential major trough 3, then the rigidity in rib-like land, side portion 41 more can be suppressed to reduce, obtain the effect significantly improving resistance to partial wear performance.Its result is to obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance.In addition, in order to obtain the effect significantly improving resistance to partial wear performance and the effect significantly improving wet road performance, more preferably maximum groove depth D2, the D3 of circumferential stria 5 and Width stria 6 being set to 20% of the groove depth D1 being more than or equal to circumferential major trough 3, being less than or equal to the scope of 30%.
In addition, as shown in Figure 1 or 2, the groove width of the preferred central major trough 31 of air-inflation tyre 1 of present embodiment be the tire width direction size L being more than or equal to tire equator face CL to ground terminal T 3%, be less than or equal to 15% scope, therebetween relative to the adjacent each circumferential major trough 3 arranging rib-like land, side portion 41 of central major trough 31, the position of its distance tire equator face CL be the tire width direction size L being more than or equal to tire equator face CL to ground terminal T 50%, be less than or equal to 60% scope.
In addition, tire equator face CL is left and each circumferential major trough 3 arranged is the groove width middle position of this circumferential major trough 3 apart from the position of tire equator face CL.
Here, ground terminal T refers to that air-inflation tyre 1 (is assembled in regular wheel rim by ground area, and fill regular interior pressure, when applying 70% load of regular load simultaneously, the region that the tyre surface 2a of the fetus face 2 of this air-inflation tyre 1 contacts with road surface) tire width direction two outermost end, in Fig. 1 and Fig. 2, tire circumference is shown with ground terminal T continuously.In addition, the tire width direction interval of ground terminal T is set as ground connection width TW, in the air-inflation tyre 1 of the present embodiment of symmetrical tread contour, the tire width direction size L of tire equator face CL to ground terminal T is equivalent to 1/2 of ground connection width TW.
In addition, regular wheel rim refer to " standard rim " of JATMA defined, " the Design Rim " of TRA defined or ETRTO defined " Measuring Rim ".In addition, regular interior pressure refers to " the highest air pressure " of JATMA defined, " TIRE LOADLIMITS AT VARIOUS COLD INFLATION PRESSURES " middle maxim of record of TRA defined or " the INFLATION PRESSURES " of ETRTO defined.In addition, regular load refers to " maximum load capability " of JATMA defined, " TIRE LOADLIMITS AT VARIOUS COLD INFLATION PRESSURES " middle maxim of record of TRA defined or " the LOAD CAPACITY " of ETRTO defined.
Tire easily with the tire width direction center side of tyre surface 2a for starting point, occur hydroplaning.Therefore, according to this air-inflation tyre 1, the groove width of the central major trough 31 being configured at tire width direction center side is specified, and by with the tire width direction of central major trough 31 outside the position of adjacent circumferential major trough 3 be configured in tire width direction center side, the drainage of tire width direction center side can be improved, thus further can improve wet road performance.
In addition, the air-inflation tyre 1 of present embodiment does not preferably configure stria and the groove of 10% of the groove depth D1 being more than or equal to circumferential major trough 3 in tire width direction outermost rib-like land portion 4.
According to this air-inflation tyre 1, tire width direction outermost rib-like land portion 4 does not configure stria and the groove of 10% of the groove depth D1 being more than or equal to circumferential major trough 3, thus the more significant effect improving resistance to partial wear performance can be obtained.In addition, as shown in Figure 4, the air-inflation tyre 1 of present embodiment has tread groove 10, and its one end is communicated to circumferential major trough 3, and the other end ends at rib-like land portion 4 and in tyre surface 2a upper shed.
In addition, the air-inflation tyre 1 of present embodiment preferably forms the JIS hardness of sizing material at 20 DEG C of fetus face 2 is the scope being more than or equal to 60, being less than or equal to 75.
According to this air-inflation tyre 1, by making the JIS hardness of the sizing material of formation fetus face 2 at 20 DEG C for being more than or equal to 60, can be obtained by suitable hardness and significantly improve the effect of resistance to partial wear performance and significantly improve the effect of wet road performance.Form the sizing material of the fetus face 2 JIS hardness at 20 DEG C for 75 these numerical value are maxims that conventional pneumatic tires uses.In addition, in order to obtain the effect of the resistance to partial wear performance of significant raising more and the more significant effect improving wet road performance, preferably the JIS hardness of sizing material at 20 DEG C forming fetus face 2 is set to the scope being more than or equal to 65, being less than or equal to 70.
In addition, the air-inflation tyre 1 of present embodiment is preferably applicable to specify that interior pressure is for being less than or equal to the pickup truck air-inflation tyre of 600kPa.
Pickup truck air-inflation tyre is mainly used in local traveling, can loiter during middle low speed driving repeated multiple timesly, therefore, requires that it possesses excellent resistance to partial wear performance and earth-grasping force (wet road performance).Air-inflation tyre 1 according to the present embodiment, as being mainly used in the local pickup truck air-inflation tyre travelled, can meet excellent resistance to partial wear performance and the requirement of earth-grasping force.
Embodiment
Fig. 5 ~ Fig. 8 is the chart representing the airtyred performance test results that the present embodiment is correlated with.In the present embodiment, for the multiple air-inflation tyre that condition is different, carry out the performance test about resistance to partial wear performance and wet road performance (wetland deceleration and stopping performance).
In this performance test, be that the air-inflation tyre of 205/85R16117/115L LTR rib is assembled on regular wheel rim by tire size, fill regular interior pressure, be installed on test vehicle (pickup truck of load-carrying 3t).
The appraisal procedure of resistance to partial wear performance is utilize above-mentioned test vehicle, after travelling 50,000 km, measures the partial wear (difference of the treadwear amount in rib-like land, side portion and other rib-like land portions) that rib-like land portion occurs with average velociity 60km/h.Then, according to this result of a measurement, with conventional example for benchmark (100), assessed by index.In this assessment, the larger expression of numerical value resistance to partial wear performance is more outstanding.
The appraisal procedure of wet road performance utilizes above-mentioned test vehicle, on the wet-skid road surface checkout area of the depth of water 10 ± 1mm, measures the stopping distance under initial velocity 60km/h.Then, according to this result of a measurement, with conventional example for benchmark (100), assessed by index.In this assessment, the larger expression of the numerical value road performance that wets is more outstanding.
Fig. 5 and Fig. 6 configures 4 circumferential major troughs at fetus face, marks off the air-inflation tyre in 5 rib-like lands portion.That is, circumferential major trough is not on tire equator face.The air-inflation tyre of conventional example 1 configures multiple Width stria for rib-like land portion (rib-like land, side portion), make rib-like land, side portion for block, wherein said rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face, each end of described Width stria is communicated to the circumferential major trough of rib-like land portion (rib-like land, side portion) tire width direction both sides, and the groove depth formed is more shallow than circumferential major trough.In addition, the air-inflation tyre of comparative example 1 configures circumferential stria for rib-like land portion (rib-like land, side portion), rib-like land, side portion is made to become 2 rib-like, wherein said rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face, described circumferential stria extends along tire circumference, and the groove depth formed is more shallow than circumferential major trough.In addition, relative to the air-inflation tyre of comparative example 1, the air-inflation tyre of comparative example 2 configures multiple Width stria in rib-like land, side portion, make rib-like land, side portion for block, wherein said Width stria is communicated to the circumferential major trough of tire width direction both sides, and the groove depth formed is more shallow than circumferential major trough.The air-inflation tyre of this conventional example 1, comparative example 1, comparative example 2 does not form stria in other rib-like land portions.
On the other hand, as shown in Figures 5 and 6, the air-inflation tyre of embodiment 1 ~ embodiment 26 is for rib-like land portion (rib-like land, side portion), comprise: circumferential stria, it is from the tire width direction side in rib-like land, side portion, be more than or equal to this rib-like land, side portion tire width direction size 40%, be less than or equal in the scope of 60%, along tire circumference extend, the groove depth formed is more shallow than circumferential major trough; Width stria, it is configured with multiple in tire circumference, one end be communicated to the tire width direction in rib-like land, side portion outside adjacent circumferential major trough end at this circumferential major trough, the other end runs through circumferential stria and intersection extension in tire circumference while ending in the portion of rib-like land, side, and the groove depth formed is more shallow than circumferential major trough; And circumferential slot cunette groove, it is formed along the bearing of trend of this circumferential stria at the bottom land of circumferential stria, wherein make with inside the tire width direction in circumferential stria rib-like land, the side portion that is boundary for rib-like, make with outside the tire width direction in circumferential stria rib-like land, the side portion that is boundary for bulk, described rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face.The air-inflation tyre of the present embodiment 1 ~ embodiment 26 does not form stria in other rib-like land portions.The air-inflation tyre of embodiment 5 ~ embodiment 26 is formed with bottom land groove at the bottom land of Width stria.The air-inflation tyre of embodiment 9 ~ embodiment 26 is formed with tread groove at the other end of Width stria.The air-inflation tyre of embodiment 7, embodiment 8, embodiment 11 ~ embodiment 26 does not configure Width bottom land groove and circumferential slot cunette groove at the cross part of stria.Width bottom land groove is communicated with tread groove by the air-inflation tyre of embodiment 13 ~ embodiment 26.The airtyred ditch groove deep of embodiment 4, embodiment 6, embodiment 10, embodiment 8, embodiment 12, embodiment 14 ~ embodiment 26 is in specialized range.The air-inflation tyre of embodiment 19 ~ embodiment 26 has been bent to form Width stria along linear components.The air-inflation tyre of embodiment 20 ~ embodiment 26 defines the relation between the groove width at Width stria two ends.The airtyred stria groove depth of embodiment 21 ~ embodiment 26 is in specialized range.The air-inflation tyre of embodiment 26 meets the groove width of central major trough and the position regulation of adjacent circumferential major trough.
Fig. 7 and Fig. 8 configures 4 circumferential major troughs at fetus face, marks off the air-inflation tyre in 5 rib-like lands portion.That is, circumferential major trough is not on tire equator face.The air-inflation tyre of conventional example 2 configures multiple Width stria for rib-like land portion (rib-like land, side portion), make rib-like land, side portion for block, wherein said rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face, each end of described Width stria is communicated to the circumferential major trough of rib-like land portion (rib-like land, side portion) tire width direction both sides, and the groove depth formed is more shallow than circumferential major trough.In addition, the air-inflation tyre of comparative example 3 configures circumferential stria for rib-like land portion (rib-like land, side portion), rib-like land, side portion is made to become 2 rib-like, wherein said rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face, described circumferential stria extends along tire circumference, and the groove depth formed is more shallow than circumferential major trough.In addition, relative to the air-inflation tyre of comparative example 3, the air-inflation tyre of comparative example 4 configures multiple Width stria in rib-like land, side portion, make rib-like land, side portion for block, wherein said Width stria is communicated to the circumferential major trough of tire width direction both sides, and the groove depth formed is more shallow than circumferential major trough.The air-inflation tyre of this conventional example 2, comparative example 3, comparative example 4 does not form stria in other rib-like land portions.
On the other hand, as shown in Figures 7 and 8, the air-inflation tyre of embodiment 27 ~ embodiment 52 is for rib-like land portion (rib-like land, side portion), comprise: circumferential stria, it is from the tire width direction side in rib-like land, side portion, be more than or equal to this rib-like land, side portion tire width direction size 40%, be less than or equal in the scope of 60%, along tire circumference extend, the groove depth formed is more shallow than circumferential major trough; Width stria, it is configured with multiple in tire circumference, one end be communicated to the tire width direction in rib-like land, side portion outside adjacent circumferential major trough end at this circumferential major trough, the other end runs through circumferential stria and intersection extension in tire circumference while ending in the portion of rib-like land, side, and the groove depth formed is more shallow than circumferential major trough; And circumferential slot cunette groove, it is formed along the bearing of trend of this circumferential stria at the bottom land of circumferential stria, wherein make with inside the tire width direction in circumferential stria rib-like land, the side portion that is boundary for rib-like, make with outside the tire width direction in circumferential stria rib-like land, the side portion that is boundary for bulk, described rib-like land portion (rib-like land, side portion) adjoins with the tire width direction both sides of each circumferential major trough (central major trough) of tire width direction both sides, tire equator face.The air-inflation tyre of the present embodiment 27 ~ embodiment 52 does not form stria in other rib-like land portions.The air-inflation tyre of embodiment 31 ~ embodiment 52 is formed with bottom land groove at the bottom land of Width stria.The air-inflation tyre of embodiment 35 ~ embodiment 52 is formed with tread groove at the other end of Width stria.The air-inflation tyre of embodiment 33, embodiment 34, embodiment 37 ~ embodiment 52 does not configure Width bottom land groove and circumferential slot cunette groove at the cross part of stria.Width bottom land groove is communicated with tread groove by the air-inflation tyre of embodiment 39 ~ embodiment 52.The airtyred ditch groove deep of embodiment 30, embodiment 32, embodiment 34, embodiment 36, embodiment 38, embodiment 40 ~ embodiment 52 is in specialized range.The air-inflation tyre of embodiment 45 ~ embodiment 52 has been bent to form Width stria along linear components.The air-inflation tyre of embodiment 46 ~ embodiment 52 defines the relation between the groove width at Width stria two ends.The airtyred stria groove depth of embodiment 47 ~ embodiment 52 is in specialized range.The air-inflation tyre of embodiment 52 meets the groove width of central major trough and the position regulation of adjacent circumferential major trough.
As shown in the test results of Fig. 5 ~ Fig. 8, airtyred resistance to partial wear performance and the wet road performance of known embodiment 1 ~ embodiment 52 are improved.
Nomenclature
1 air-inflation tyre
2 fetus faces
2a tyre surface
3 circumferential major troughs
31 central major troughs
4 rib-like lands portion
41 rib-like land, sides portion
5 circumferential strias
6 Width strias
7 circumferential slot cunette grooves
8 Width bottom land grooves
9 tread groove
T ground terminal
Claims (13)
1. an air-inflation tyre, it is on the tyre surface of fetus face, by least 3 the circumferential major troughs extended along tire circumference, forms at least 4 the rib-like lands portion extended along tire circumference, it is characterized in that,
When above-mentioned circumferential major trough is odd number bar, with the above-mentioned circumferential major trough of central authorities for central major trough, when above-mentioned circumferential major trough is even number bar, using 2 of center side each above-mentioned circumferential major troughs in the lump as central major trough, using with the tire width direction two of above-mentioned central major trough outside adjacent rib-like land portion as rib-like land, side portion time, comprising:
Circumference stria, it is from the tire width direction side in rib-like land portion, above-mentioned side, be more than or equal to 40% of the tire width direction size in rib-like land portion, described side, be less than or equal in the scope of 60%, extend along tire circumference, the groove depth formed is more shallow than above-mentioned circumferential major trough;
Width stria, it is configured with multiple in tire circumference, be arranged in rib-like land portion, above-mentioned side, one end be communicated to the tire width direction in rib-like land portion, above-mentioned side outside adjacent circumferential major trough end at described circumferential major trough, the other end runs through above-mentioned circumferential stria and intersection extension in tire circumference while ending in rib-like land portion, above-mentioned side, and the groove depth formed is more shallow than above-mentioned circumferential major trough; And
Circumferential slot cunette groove, it is formed along the bearing of trend of described circumferential stria at the bottom land of above-mentioned circumferential stria,
Wherein make with inside the tire width direction in the above-mentioned circumferential stria rib-like land portion, above-mentioned side that is boundary for rib-like, make with outside the tire width direction in the above-mentioned circumferential stria rib-like land portion, above-mentioned side that is boundary for bulk.
2. air-inflation tyre according to claim 1, is characterized in that, and then comprises Width bottom land groove, and it is formed along the bearing of trend of described Width stria at the bottom land of above-mentioned Width stria.
3. air-inflation tyre according to claim 1 and 2, is characterized in that, and then comprises tread groove, and it is from the other end of above-mentioned Width stria, extends, end in rib-like land portion, above-mentioned side in above-mentioned central major trough side.
4. the air-inflation tyre according to Claims 2 or 3, is characterized in that, deducts cross part when above-mentioned Width stria runs through above-mentioned circumferential stria, forms above-mentioned Width bottom land groove.
5. the air-inflation tyre according to any one of claim 2 to 4, is characterized in that, is communicated with, forms above-mentioned Width bottom land groove with above-mentioned tread groove.
6. air-inflation tyre according to any one of claim 1 to 5, is characterized in that, the maximum groove depth of above-mentioned groove from above-mentioned tyre surface is set to be more than or equal to above-mentioned circumferential major trough groove depth 60%, the scope be less than or equal under 90%.
7. air-inflation tyre according to any one of claim 1 to 6, is characterized in that, is bent to form above-mentioned Width stria along each linear components, and described linear components at least has two angles relative to tire circumference.
8. air-inflation tyre according to any one of claim 1 to 7, it is characterized in that, above-mentioned Width stria is formed as, the end side groove width W1 being communicated to above-mentioned circumferential major trough and the wide W2 of other end side channel ending at rib-like land portion, above-mentioned side meets the relation of W2<W1, and at one end changes groove width gradually between side and another side.
9. air-inflation tyre according to any one of claim 1 to 8, is characterized in that, the maximum groove depth of above-mentioned circumferential stria and above-mentioned Width stria is set to be more than or equal to 10% of above-mentioned circumferential major trough groove depth, to be less than or equal to the scope of 40%.
10. air-inflation tyre according to any one of claim 1 to 9, it is characterized in that, the groove width of above-mentioned central major trough be more than or equal to tire equator face to ground terminal tire width direction size 3%, be less than or equal to 15% scope, the position that each above-mentioned circumferential major trough distance tire equator face in rib-like land portion, above-mentioned side is therebetween set relative to above-mentioned central major trough be more than or equal to tire equator face to ground terminal tire width direction size 50%, be less than or equal to 60% scope.
11. air-inflation tyres according to any one of claim 1 to 10, is characterized in that, tire width direction outermost rib-like land portion do not configure be more than or equal to above-mentioned circumferential major trough groove depth 10% stria and groove.
12. air-inflation tyres according to any one of claim 1 to 11, it is characterized in that, the JIS hardness of sizing material at 20 DEG C forming above-mentioned fetus face is the scope being more than or equal to 60, being less than or equal to 75.
13. air-inflation tyres according to any one of claim 1 to 12, is characterized in that, are applicable to be pressed in the pickup truck air-inflation tyre being less than or equal to 600kPa in regulation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012196532A JP5803859B2 (en) | 2012-09-06 | 2012-09-06 | Pneumatic tire |
| JP2012-196532 | 2012-09-06 | ||
| PCT/JP2013/072324 WO2014038377A1 (en) | 2012-09-06 | 2013-08-21 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104364090A true CN104364090A (en) | 2015-02-18 |
| CN104364090B CN104364090B (en) | 2017-02-22 |
Family
ID=50236991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380029217.9A Expired - Fee Related CN104364090B (en) | 2012-09-06 | 2013-08-21 | Pneumatic tire |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5803859B2 (en) |
| CN (1) | CN104364090B (en) |
| WO (1) | WO2014038377A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070648A (en) * | 2016-04-26 | 2018-12-21 | 横滨橡胶株式会社 | Pneumatic tire |
| US10195904B2 (en) | 2014-05-29 | 2019-02-05 | Bridgestone Corporation | Pneumatic tire |
| CN111741857A (en) * | 2018-02-14 | 2020-10-02 | 横滨橡胶株式会社 | Pneumatic tire |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6126571B2 (en) * | 2014-12-09 | 2017-05-10 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6534300B2 (en) * | 2015-06-16 | 2019-06-26 | 株式会社ブリヂストン | tire |
| JP6517601B2 (en) * | 2015-06-19 | 2019-05-22 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| CN107685600B (en) * | 2016-08-03 | 2020-09-08 | 横滨橡胶株式会社 | Pneumatic tire |
| JP7207304B2 (en) * | 2018-07-13 | 2023-01-18 | 横浜ゴム株式会社 | pneumatic tire |
| JP7123734B2 (en) * | 2018-10-22 | 2022-08-23 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tire |
| JP6888706B1 (en) * | 2020-03-04 | 2021-06-16 | 横浜ゴム株式会社 | tire |
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|---|---|---|---|---|
| CN101734111A (en) * | 2008-11-20 | 2010-06-16 | 横滨橡胶株式会社 | Heavy load pneumatic tire |
| CN102089162A (en) * | 2008-07-15 | 2011-06-08 | 株式会社普利司通 | Pneumatic tire |
| JP2012091736A (en) * | 2010-10-28 | 2012-05-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| WO2012098895A1 (en) * | 2011-01-19 | 2012-07-26 | 株式会社ブリヂストン | Pneumatic tire |
| JP2012153157A (en) * | 2011-01-21 | 2012-08-16 | Bridgestone Corp | Pneumatic tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3774798B2 (en) * | 1997-07-11 | 2006-05-17 | 東洋ゴム工業株式会社 | Radial tire |
| JP5528208B2 (en) * | 2010-05-20 | 2014-06-25 | 株式会社ブリヂストン | Pneumatic tire |
-
2012
- 2012-09-06 JP JP2012196532A patent/JP5803859B2/en active Active
-
2013
- 2013-08-21 CN CN201380029217.9A patent/CN104364090B/en not_active Expired - Fee Related
- 2013-08-21 WO PCT/JP2013/072324 patent/WO2014038377A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102089162A (en) * | 2008-07-15 | 2011-06-08 | 株式会社普利司通 | Pneumatic tire |
| CN101734111A (en) * | 2008-11-20 | 2010-06-16 | 横滨橡胶株式会社 | Heavy load pneumatic tire |
| JP2012091736A (en) * | 2010-10-28 | 2012-05-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| WO2012098895A1 (en) * | 2011-01-19 | 2012-07-26 | 株式会社ブリヂストン | Pneumatic tire |
| JP2012153157A (en) * | 2011-01-21 | 2012-08-16 | Bridgestone Corp | Pneumatic tire |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10195904B2 (en) | 2014-05-29 | 2019-02-05 | Bridgestone Corporation | Pneumatic tire |
| CN109070648A (en) * | 2016-04-26 | 2018-12-21 | 横滨橡胶株式会社 | Pneumatic tire |
| DE112017002199B4 (en) * | 2016-04-26 | 2021-05-06 | The Yokohama Rubber Co., Ltd. | tire |
| CN111741857A (en) * | 2018-02-14 | 2020-10-02 | 横滨橡胶株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014038377A1 (en) | 2014-03-13 |
| CN104364090B (en) | 2017-02-22 |
| JP2014051178A (en) | 2014-03-20 |
| JP5803859B2 (en) | 2015-11-04 |
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