CN102218976B - Pneumatic tyre - Google Patents
Pneumatic tyre Download PDFInfo
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- CN102218976B CN102218976B CN201110100552.6A CN201110100552A CN102218976B CN 102218976 B CN102218976 B CN 102218976B CN 201110100552 A CN201110100552 A CN 201110100552A CN 102218976 B CN102218976 B CN 102218976B
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- furrow
- longitudinal furrow
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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
- B60C11/0083—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the curvature of the tyre tread
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
- B60C11/0309—Patterns comprising block rows or discontinuous ribs further characterised by the groove cross-section
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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
- B60C11/1376—Three dimensional block surfaces departing from the enveloping tread contour
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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
- B60C3/00—Tyres characterised by the transverse section
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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
- B60C3/00—Tyres characterised by the transverse section
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention relates to a pneumatic tyre, which has the characteristics of drainage decrease prevention, operating stability improvement, noise performance and good anti-wearing performances. The tread contour of the pneumatic tyre in the invention comprises an inner side part and an outer side part. The inner side part comprises an inner side tyre surface reference face formed by circular arcs with a radius of curvature and an inner side chamfered circular arc face formed by circular arcs with a smaller radius of curvature. The outer side part comprises an outer side tyre surface reference face formed by circular arcs with a radius of curvature and an outer side chamfered circular arc face formed by circular arcs with a smaller radius of curvature. The outer side chamfered depth is larger than the inner side chamfered depth. The outer side chamfered depth is a normal-direction distance between an outer side imagined circular arc extending from outer side tyre surface reference face towards the axial inner side and the outer side chamfered circular arc face. The inner side chamfered depth is a normal-direction distance between an inner side imagined circular arc extending from the inner side tyre surface reference face towards the axial outer side and the inner side chamfered circular arc face.
Description
Technical field
The present invention relates to the profile of the tread by improving fetus face, suppressing the reduction of drainage and improving the air-inflation tyre of control stability, noiseproof feature and anti-partial wear performance.
Background technology
In the past, in order to improve control stability and anti-partial wear performance, there will be a known following air-inflation tyre: as the tread profile of airtyred fetus face, connecting smoothing for multiple circular arcs different for radius of curvature.In addition, in order to ensure drainage performance, and the larger longitudinal furrow of ditch width is set continuously along tire circumference.
But, this air-inflation tyre, as shown in Fig. 8 (a) He (b), when tyre vulcanization is shaped, unvulcanized tread-rubber g be formed longitudinal furrow h mould k projection pressing, the rubber produced to its both sides movement flows.Therefore the rubber thickness tb depositing longitudinal furrow both sides is after curing greater than the tendency of target thickness ta.In addition, when tire ground connection, due to the opening and closing (opening) of longitudinal furrow, the outer rim of the furrow bank of this longitudinal furrow can become the state of so-called coign sometimes.Due to these reasons, air-inflation tyre in the past as the A portion of Fig. 9 clear and definite, this point can also be increased to understand from the tire circumferential lengths LB at longitudinal furrow both sides ground plane, because the earth contact pressure of longitudinal furrow G both sides increases, the earth contact pressure of whole ground plane becomes uneven, therefore there is the tendency of control stability and the reduction of partial wear performance.In addition, for opening, the flare due to tire tread contour causes the ground connection side of longitudinal furrow larger, therefore there is tendency easy to wear.Correlation technique is as follows.
Patent documentation 1: Japanese Unexamined Patent Publication 2009-23601 publication
Summary of the invention
The present invention is in view of above problem is made, it is basic with the profile of the tread limiting fetus face in the tire axial both sides of tire shoulder longitudinal furrow and the ditch width that limits tire-shoulder transverse groove that its main purpose is to provide a kind of, can suppress the reduction of drainage and improve the air-inflation tyre of control stability, noiseproof feature and anti-partial wear performance.
Invention in the present invention described in technical scheme 1 is a kind of air-inflation tyre, have at fetus face and to extend continuously and ditch width is the tire shoulder longitudinal furrow of 5.0 ~ 20.0mm along tire circumference near ground connection side, it is characterized in that, be installed on regular wheel rim and be filled with on the tyre equatorial cross section of the tire rotation axle of the zero load of 5% of regular interior pressure that is interim installing condition comprising, the profile of the tread of above-mentioned fetus face comprises: inside portion, and it extends inside tire axial from the outer rim of the furrow bank of the tire equator side of above-mentioned tire shoulder longitudinal furrow, and outside portion, it extends outside tire axial from the outer rim of the furrow bank of the ground connection side of above-mentioned tire shoulder longitudinal furrow, above-mentioned inside portion comprises: inner side tyre surface reference plane, and it is by being configured in tire equator side and forming to the circular arc of radius of curvature R a that tire radial outside protrudes, and inner side chamfering shape arc surface, it is by the outer rim of the outer end of tire axial and the furrow bank of above-mentioned tire equator side that connect above-mentioned inner side tyre surface reference plane, and the circular arc that radius of curvature R b is less than the above-mentioned radius of curvature R a protruded to tire radial outside is formed, above-mentioned outside portion comprises: outside tyre surface reference plane, and it is by being configured in ground connection side and forming to the circular arc of radius of curvature R d that tire radial outside protrudes, and outside chamfering shape arc surface, it is by the outer rim of the inner of tire axial and the furrow bank of above-mentioned ground connection side of connecting above-mentioned outside tyre surface reference plane, and the circular arc that radius of curvature R c is less than the above-mentioned radius of curvature R d protruded to tire radial outside is formed, and outside depth of chamfering yo is greater than inner side depth of chamfering yi, wherein outside depth of chamfering yo is the outside imagination circular arc extended inside tire axial by above-mentioned outside tyre surface reference plane, and the normal direction distance relative to above-mentioned outside imagination circular arc between the outside chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned ground connection side, inner side depth of chamfering yi is by the inner side imagination circular arc of above-mentioned inner side tyre surface reference plane to tire axial lateral, with the normal direction distance relative to above-mentioned inner side imagination circular arc of the above-mentioned inner side chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned equator side.
In addition, invention described in technical scheme 2 is on the airtyred basis described in technical scheme 1, at above-mentioned fetus face, there are many tire-shoulder transverse groove, they extend towards above-mentioned tire shoulder longitudinal furrow from than ground terminal by exceeding this ground terminal the position outside tire axial, and arrange along tire circumference interval, above-mentioned many tire-shoulder transverse groove are at above-mentioned tire shoulder longitudinal furrow place opening, and the summation of the ditch width of the midway location of the tire axial of above-mentioned tire shoulder longitudinal furrow and ground terminal, is greater than the summation of the A/F at above-mentioned tire shoulder longitudinal furrow place opening.
In addition, the invention described in technical scheme 3 is on the airtyred basis described in technical scheme 2, and the summation of the above-mentioned A/F of above-mentioned tire-shoulder transverse groove is, 10% ~ 85% of the summation of the ditch width of above-mentioned midway location.
In addition, the invention described in technical scheme 4 is on the airtyred basis described in technical scheme 2 or 3, has the ditch width narrow width part less than the average groove width degree of this tire-shoulder transverse groove in above-mentioned tire shoulder longitudinal furrow side.
In addition, invention described in technical scheme 5 is on the airtyred basis described in technical scheme 4, above-mentioned tire-shoulder transverse groove comprises: above-mentioned narrow width part and being connected with this narrow width part and the wide width part of the ditch wider width extended to ground connection side, and above-mentioned wide width part has the oblique groove bottom surface increased gradually towards the ground terminal lateral sulcus degree of depth.
In addition, invention described in technical scheme 6 is on the airtyred basis described in technical scheme 1, above-mentioned fetus face has many tire-shoulder transverse groove, they to extend towards above-mentioned tire shoulder longitudinal furrow from than ground terminal by exceeding this ground terminal the position outside tire axial and to arrange along tire circumference interval, and above-mentioned tire-shoulder transverse groove is not opening but form terminal at above-mentioned tire shoulder longitudinal furrow place.
In addition, the invention described in technical scheme 7 is on the airtyred basis described in any one party case in technical scheme 1 to 6, above-mentioned tire shoulder longitudinal furrow, and the angle of the furrow bank of its equator side is less than the angle of the furrow bank of ground connection side.
Air-inflation tyre of the present invention has: ditch width is the wider tire shoulder longitudinal furrow of the ditch width of 5.0 ~ 20.0mm and from many tire-shoulder transverse groove extended towards above-mentioned tire shoulder longitudinal furrow by exceeding ground terminal the position outside tire axial than ground terminal.Due to such air-inflation tyre can reliably by the moisture film on road surface to draining outside tire outer circumferential and tire axial, therefore, it is possible to maintain higher drainage performance.
In addition, the profile of the tread of airtyred fetus face of the present invention comprises: inside portion, and it extends inside tire axial from the furrow bank outer rim of the tire equator side of tire shoulder longitudinal furrow; And outside portion, it extends outside tire axial from the furrow bank outer rim of the ground connection side of above-mentioned tire shoulder longitudinal furrow.Inside portion comprises: inner side tyre surface reference plane, and it is by being configured in tire equator side and forming to the circular arc of radius of curvature R a that tire radial outside protrudes; And inner side chamfering shape arc surface, it is by the outer rim of the outer end of tire axial and the furrow bank of above-mentioned tire equator side that connect tyre surface reference plane inside this, and the circular arc formation that radius of curvature R b is less than the above-mentioned radius of curvature R a protruded to tire radial outside.In addition, outside portion comprises: outside tyre surface reference plane, and it is by being configured in ground connection side and forming to the circular arc of radius of curvature R d that tire radial outside protrudes; And outside chamfering shape arc surface, it is by the outer rim of the inner of tire axial and the furrow bank of above-mentioned ground connection side of connecting above-mentioned outside tyre surface reference plane, and the circular arc formation that radius of curvature R c is less than the above-mentioned radius of curvature R d protruded to tire radial outside.Such air-inflation tyre, by inner side and outer side chamfering shape arc surface, the earth contact pressure of earth contact pressure than the outer rim both sides being easier to the tire shoulder longitudinal furrow increased can be reduced, therefore make the earth contact pressure of whole ground plane become even, thus improve control stability and anti-partial wear performance.
In addition, airtyred tire tread contour of the present invention, outside depth of chamfering yo is formed be greater than inner side depth of chamfering yi, described outside depth of chamfering yo is the outside imagination circular arc extended inside tire axial by outside tyre surface reference plane, and the normal direction distance relative to above-mentioned outside tyre surface reference plane between the outside chamfering shape arc surface of the outer fringe position of the furrow bank of ground connection side, described inner side depth of chamfering yi is by the inner side imagination circular arc of inner side tyre surface reference plane to tire axial lateral, with the normal direction distance relative to above-mentioned inner side tyre surface reference plane of the inner side chamfering shape arc surface of the outer fringe position of the furrow bank of equator side.Such air-inflation tyre can make the earth contact pressure being more abutted against side, ground than the tire equator side of tire shoulder longitudinal furrow reduce further.Therefore, the earth contact pressure of the furrow bank outer rim of the ground connection side in the tire shoulder longitudinal furrow easily producing coign is reduced, so make earth contact pressure evenly, thus improve road-holding property and anti-partial wear performance further.
Accompanying drawing explanation
Fig. 1 is the airtyred cutaway view representing an embodiment of the invention.
Fig. 2 is the expansion drawing of fetus face.
Fig. 3 is the amplification view near its tire shoulder longitudinal furrow.
Fig. 4 is cutaway view tire shoulder longitudinal furrow amplified further.
Fig. 5 is the block diagram of tire-shoulder transverse groove.
Fig. 6 is the expansion drawing of the fetus face of other embodiments of the present invention.
Fig. 7 is the figure of the ground connection shape of the airtyred front-wheel representing an embodiment of the invention.
The figure of the rubber flowing near longitudinal furrow when Fig. 8 (a) is the pneumatic tire vulcanization illustrated in the past, (b) is the figure of the shape near the longitudinal furrow after sulfuration is described.
Fig. 9 is the figure of the ground connection shape of the airtyred front-wheel represented in the past.
Nomenclature in figure:
1... air-inflation tyre; 2... fetus face; The tread of 2n... fetus face; 9... tire shoulder longitudinal furrow; 10... tire-shoulder transverse groove; 13... the furrow bank of the tire equator side of tire shoulder longitudinal furrow; The furrow bank outer rim of the tire equator side of 13a... tire shoulder longitudinal furrow; 14... the furrow bank of the ground connection side of tire shoulder longitudinal furrow; The furrow bank outer rim of the ground connection side of 14a... tire shoulder longitudinal furrow; 15... inner side tyre surface reference plane; The outer end of the tire axial of tyre surface reference plane inside 15a...; Imaginary circular arc inside 15c...; 16... inner side chamfering shape arc surface; 17... outside tyre surface reference plane; The inner of the tire axial of tyre surface reference plane outside 17a...; Imaginary circular arc outside 17c...; 18... outside chamfering shape arc surface; C... tire equator; Te... ground terminal; TP... profile.
Detailed description of the invention
Fig. 1 represents the cutaway view (the A-A line cutaway view of Fig. 2) of the tire rotation axle of the air-inflation tyre 1 comprising present embodiment, and Fig. 2 represents the expansion drawing of fetus face, and Fig. 3 represents the amplification view near tire shoulder longitudinal furrow.In addition, the cutaway view of Fig. 1 tire is carried out wheel rim assembling to regular wheel rim (not shown) and fills 5% of regular interior pressure and the tire of uncharge interim installing condition.Interim installing condition is like this consistent with the tire face (omit and illustrate) of the sulfurizing mould formed the air-inflation tyre of present embodiment in fact.In addition, so interim installing condition, such as, by being temporarily installed on wheel rim by tire and after being filled with regular interior pressure, carrying out decompression can easily obtain.In addition, when non-specified otherwise, the size etc. in each portion of tire is the value measured in this provisionally attached state.
At this, above-mentioned " regular wheel rim " refers to, in the schematism of specification comprising tire institute foundation, the wheel rim that each specification specifies by each tire, if JATMA is then " standard rim ", if TRA is then " Design Rim ", if ETRTO is then " Measuring Rim ".In addition, above-mentioned " regular interior pressure " is in the schematism of the specification comprising tire institute foundation, the air pressure that each specification specifies by each tire, if JATMA is then " most high air pressure ", if the maxim of TRA then described in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO is then " INFLATION PRESSURE ".
The air-inflation tyre (following, sometimes referred to as " tire ") 1 of present embodiment, as shown in Figure 1, have: carcass 6, it arrives the bead core 5 of bead part 4 through sidewall 3 from fetus face 2; Bracing ply 7, it is configured in the radial outside of this carcass 6 and in the inside of fetus face 2, represents the air-inflation tyre of car in the present embodiment.
Above-mentioned carcass 6 is at least made up of 1 piece of (being 1 piece in the present embodiment) carcass ply 6A, and this carcass ply 6A has: main part 6a, and it is crossed between pair of bead core 5,5 with ring-type; Return portion 6b, it is connected with the both sides of aforementioned body portion 6a and turns back from tire axial Inside To Outside around above-mentioned bead core 5.The body cord that above-mentioned carcass ply 6A is such as made up of organic fiber relative to tire equator C direction, such as, forms with the angular array of 75 ° ~ 90 °.In addition, between main part 6a and return portion 6b, configure the bead apex 8 extended to the tire radial outside of this bead core 5 with taper from bead core 5, thus reinforced bead portion 4.
Above-mentioned bracing ply 7 is at least formed by two pieces, is in the present embodiment to be made up of tire radial inside and outside two pieces of belt curtain cloths 7A, 7B, and interior belt curtain cloth 7A is compared with outer belting layer cord 7B, and width is formed wider.Each belt curtain cloth 7A, 7B have relative to tire equator C with elastomeric belt cords such as the such as steel cords of the angular slope of 15 ° ~ 40 °.And each belt curtain cloth 7A, 7B are to make the cross one another mode of belt cord overlapping.
As shown in Figure 1, above-mentioned fetus face 2 is provided with: a pair tire shoulder longitudinal furrow 9, they are extending along tire circumference continuously near ground connection side; Many tire-shoulder transverse groove 10, they more extend towards above-mentioned tire shoulder longitudinal furrow 9 by exceeding this ground terminal Te the position outside tire axial from than ground terminal Te.Thus, on above-mentioned fetus face 2, division has respectively: the central land portion 11 between tire shoulder longitudinal furrow 9,9; And a pair tire-shoulder land portion 12 extended between above-mentioned tire shoulder longitudinal furrow 9 and ground terminal Te.
Wherein, above-mentioned ground terminal Te is defined as and tire is carried out wheel rim assembling and the air-inflation tyre 1 being filled with the normal state of regular interior pressure loads regular load to regular wheel rim, and at the outermost earthing position of tire axial when being grounding to plane with camber angle 0 degree.In addition, above-mentioned " regular load " is in the schematism of the specification comprising tire institute foundation, the load that each specification specifies by each tire, if JATMA is then " maximum loadability ", if the maxim of TRA then described in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO is then " LOAD CAPACITY ".But when tire is passenger car tire, for be equivalent to above-mentioned each load 88% load.
The tire shoulder longitudinal furrow 9 of present embodiment is formed with linearity.Such tire shoulder longitudinal furrow 9, is playing superior drainage performance, and when suppressing braking vehicle rock or movement aspect that deflection etc. is unstable particularly preferably.In addition, tire shoulder longitudinal furrow 9 can be such as zig-zag or wavy, and is not limited to graphic form.
As shown in Figure 2, the ditch width of above-mentioned tire shoulder longitudinal furrow 9 (the ditch width rectangular with the long side direction of ditch, for following other ditch too) W1, need the scope being limited to 5.0 ~ 20.0mm.When above-mentioned ditch width W1 is less than 5.0mm, then cannot obtains enough ditch volumes, basic drainage performance cannot be guaranteed.On the contrary, when the above-mentioned ditch width W1 of tire shoulder longitudinal furrow 9 is more than 20.0mm, although wet road superior performance, except easily significantly reducing the rigidity of fetus face 2, damages beyond anti-partial wear, also cannot adopt because road-holding property is deteriorated.Especially, the ditch width W1 of tire shoulder longitudinal furrow 9 is particularly preferably in the scope of 6.0 ~ 15.0mm.
In addition, as shown in Figure 3 and Figure 4, though the non-particular determination of the trench depth D1 of tire shoulder longitudinal furrow 9, but in order to balancedly guarantee the rigidity in drainage performance and each land portion 11,12, being preferably more than 6.0mm, being more preferably more than 7.0mm, and be preferably below 10.0mm, be more preferably below 9.0mm.The trench depth D1 of tire shoulder longitudinal furrow 9 is the normal of the line of the costa colpi connecting this tire shoulder longitudinal furrow 9, the ultimate range (being shown in Fig. 4) with the bottom of trench 9b of tire shoulder longitudinal furrow 9.
In addition, though the non-particular determination of the equipping position of tire shoulder longitudinal furrow 9, but such as shown in Fig. 2, the tire axial distance L1 between the line of centers G1 of tire shoulder longitudinal furrow 9 and tire equator C, is preferably 20% ~ 30% of tread width TW.Thus, balancedly guarantee the rigidity in each land portion 11,12, contribute to improving abrasion resistance and control stability.In addition, preferably as in the present embodiment, across tire equator C, line configures a pair tire shoulder longitudinal furrow 9 symmetrically, but its configuration can be changed aptly.
The profile TP of the tread 2n of the fetus face 2 of the air-inflation tyre 1 of present embodiment is formed by being connected smoothly by multiple circular arcs different for radius of curvature.
In addition, as shown in Figure 3, the formation of above-mentioned profile TP comprises: inside portion TPa, and it extends inside tire axial from the outer rim 13a of the furrow bank 13 of the tire equator side of above-mentioned tire shoulder longitudinal furrow 9; Outside portion TPb, it extends outside tire axial from the outer rim 14a of the furrow bank 14 of the ground connection side of above-mentioned tire shoulder longitudinal furrow 9.
Inner side tyre surface reference plane 15 is connected with inner side chamfering shape arc surface 16 and forms by above-mentioned inside portion TPa smoothly, described inner side tyre surface reference plane 15 is configured in the position that is separated with above-mentioned tire shoulder longitudinal furrow 9 and in tire equator C side, the outer rim 13a of the outer end 15a of the tire axial of above-mentioned inner side tyre surface reference plane 15 and the furrow bank 13 of above-mentioned tire equator side couples together by described inner side chamfering shape arc surface 16.
The inner side tyre surface reference plane 15 of present embodiment, from the inner 15b above-mentioned outer end 15a to tire equator C, is formed by the single circular arc of the radius of curvature R a protruded to tire radial outside.In addition, the center (not shown) of the radius of curvature R a of above-mentioned inner side tyre surface reference plane 15 is positioned on tire equator C.
In addition, above-mentioned inner side chamfering shape arc surface 16 protrudes by tire radial outside in the present embodiment, and the single circular arc formation that radius of curvature R b is less than the radius of curvature R a of above-mentioned inner side tyre surface reference plane 15.In addition, the center due to inner side chamfering shape arc surface 16 is provided through on the line of the radius of curvature R a of above-mentioned outer end 15a, and therefore inner side tyre surface reference plane 15 can be connected smoothly with inner side chamfering shape arc surface 16 and not have curve.
Outside tyre surface reference plane 17 and outside chamfering shape arc surface 18 are formed by connecting by above-mentioned outside portion TPb smoothly, described outside tyre surface reference plane 17 is configured in ground terminal Te side, and the outer rim 14a of the inner 17a of the tire axial of above-mentioned outside tyre surface reference plane 17 and the furrow bank 14 of above-mentioned ground connection side couples together by described outside chamfering shape arc surface 18.
The outside tyre surface reference plane 17 of present embodiment is formed by the single circular arc of the radius of curvature R d protruded to tire radial outside.In addition, the outer end 17b of the tire axial of above-mentioned outside tyre surface reference plane 17 is located at the arbitrary position between the inner 17a of the tire axial of tyre surface reference plane 17 outside this and ground terminal Te.Further, outside it, form the circular arc (not shown) that radius of curvature is less than radius of curvature R d.
In addition, outside chamfering shape arc surface 18 is by protrude to tire radial outside and the radius of curvature R c single circular arc less than the radius of curvature R d of above-mentioned outside tyre surface reference plane 17 is formed.Wherein, on the line being centrally located at through the radius of curvature R d of above-mentioned inner 17a of outside chamfering shape arc surface 18, outside tyre surface reference plane 17 can be connected smoothly with outside chamfering shape arc surface 18 and not have point of inflection thus.
Such profile TP, as shown in Figure 3 and Figure 4, the both sides of tire shoulder longitudinal furrow 9 are formed in than inner side imagination circular arc 15c and outside imagination circular arc 17c more by the position of tire radial direction inner side, described inner side imagination circular arc 15c is by the imaginary circular arc of inner side tyre surface reference plane 15 to tire axial lateral, and described outside imagination circular arc 17c is by the imaginary circular arc of outside tyre surface reference plane 17 to tire axial lateral.Therefore, the rubber thickness t1 (being shown in Fig. 3) of tire shoulder longitudinal furrow 9 both sides, less than thickness in the past, therefore, it is possible to lower the earth contact pressure near tire shoulder longitudinal furrow 9 both sides that earth contact pressure originally easily rises, and then the earth contact pressure of ground plane entirety can be made to become even.Therefore, air-inflation tyre 1 of the present invention improves road-holding property and partial wear performance further.
In addition, as shown in Figure 3, outside depth of chamfering yo is formed as being greater than inner side depth of chamfering yi, described outside depth of chamfering yo is the normal direction distance relative to above-mentioned outside imagination circular arc 17c between the outside chamfering shape arc surface 18 of the position of the outer rim 14a of the furrow bank 14 of the imaginary circular arc 17c in outside and ground connection side, and described inner side depth of chamfering yi is the normal direction distance relative to above-mentioned inner side imagination circular arc 15c between the above-mentioned inner side chamfering shape arc surface 16 of the position of the outer rim 13a of the furrow bank 13 of the imaginary circular arc 15c in inner side and equator side.Such air-inflation tyre 1 can reduce the earth contact pressure more easily producing the ground terminal Te side that so-called coign and earth contact pressure more easily excessively increase than tire equator C side effectively.Therefore, air-inflation tyre 1 of the present invention can make earth contact pressure evenly, control stability and anti-partial wear performance can be improved further.
In order to improve above-mentioned action effect further, above-mentioned inner side depth of chamfering yi is preferably more than 0.05mm, is more preferably more than 0.1mm, and is preferably below 1.0mm, is more preferably below 0.5mm.Equally, above-mentioned outside depth of chamfering yo is preferably more than 0.05mm, is more preferably more than 0.1mm, and is preferably below 1.0mm, is more preferably below 0.5mm.
Wherein, when the difference yo-yi of above-mentioned outside depth of chamfering yo and inner side depth of chamfering yi is excessive, then the ground contact area near outside the tire axial of tire shoulder longitudinal furrow 9 significantly reduces, and thus there is the possibility that control stability and anti-partial wear performance reduce.According to such viewpoint, the difference yo-yi of above-mentioned outside depth of chamfering yo and inner side depth of chamfering yi is preferably more than 0.02mm, is more preferably more than 0.05mm, and is preferably below 0.5mm, is more preferably below 0.3mm.
In addition, as shown in Figure 4, by imagination inner side chamfering shape circular arc 16b from inner side chamfering shape arc surface 16 to tire axial lateral, be set to imaginary intersection point K1 with the intersection point of the imagination outside chamfering shape circular arc 18b extended inside tire axial by outside chamfering shape arc surface 18.The normal direction distance of this imaginary intersection point K1 and inner side imagination circular arc 15c or outside imagination circular arc 17c that is flare degree of depth Da, be preferably more than 0.015 with the ratio Da/D1 of the trench depth D1 of above-mentioned tire shoulder longitudinal furrow 9, be more preferably more than 0.025, and be preferably less than 0.12, be more preferably less than 0.075.When above-mentioned than Da/D1 more than 0.12 time, because the ground contact area of the both sides of tire shoulder longitudinal furrow 9 reduces, therefore there is the possibility of control stability and anti-partial wear degradation, contrary when above-mentioned than Da/D1 for being less than 0.015 time, existence cannot reduce the possibility of the earth contact pressure of tire shoulder longitudinal furrow 9 both sides effectively.
In addition, above-mentioned imaginary intersection point K1 is preferably formed in the position leaning on ground terminal Te side than the ditch center G1 of tire shoulder longitudinal furrow 9.Because above-mentioned outside depth of chamfering yo easily sets be greater than inner side depth of chamfering yi by such tire shoulder longitudinal furrow 9, therefore easily make the earth contact pressure of ground plane entirety even.
In addition, the radius of curvature R b of inner side chamfering shape arc surface 16 and the radius of curvature R a of inner side tyre surface reference plane 15 than Rb/Ra は, though non-particular determination, but time excessive, there is the possibility that cannot reduce the earth contact pressure of the tire equator C side of tire shoulder longitudinal furrow 9 fully, on the contrary, when above-mentioned more too small than Rb/Ra time, then the ground contact area near tire shoulder longitudinal furrow 9 significantly reduces, and therefore there is the possibility that control stability and anti-partial wear performance reduce.According to such viewpoint, be above-mentionedly preferably more than 0.1 than Rb/Ra, be more preferably more than 0.3, and be preferably less than 0.9, be more preferably less than 0.7.
According to same viewpoint, the radius of curvature R c of above-mentioned outside chamfering shape arc surface 18 is preferably more than 0.1 with the ratio Rc/Rd of the radius of curvature R d of outside tyre surface reference plane 17, is more preferably more than 0.3, and is preferably less than 0.95, is more preferably less than 0.85.
Wherein, in order to effectively play above-mentioned action effect, the radius of curvature R a of above-mentioned inner side tyre surface reference plane 15 is preferably more than 250mm, is more preferably more than 300mm, and is preferably below 1500mm, is more preferably below 1200mm.In addition, the radius of curvature R d of above-mentioned outside tyre surface reference plane 17 is preferably more than 150mm, is more preferably more than 200mm, and is preferably below 1200mm, is more preferably below 1000mm.
In addition, be greater than inner side depth of chamfering yi owing to being set to by outside depth of chamfering yo, therefore above-mentioned radius of curvature R c is preferably set to and is less than above-mentioned radius of curvature R b.Specifically, above-mentioned radius of curvature R c is preferably more than 50mm, be more preferably more than 100mm, and be preferably below 900mm, be more preferably below 700mm, similarly radius of curvature R b is preferably more than 80mm, is more preferably more than 120mm, and be preferably below 1000mm, be more preferably below 800mm.
In addition, as shown in Figure 4, the tire shoulder longitudinal furrow 9 of present embodiment, the angle θ 1 of the furrow bank 13 of its tire equator side is formed be less than the angle θ 2 of the furrow bank 14 of ground connection side.Such tire shoulder longitudinal furrow 9 can make the further passivation in bight of the ground connection side especially easily producing partial wear, and greatly guarantees the rigidity of this part.Therefore, the air-inflation tyre of present embodiment balancedly can maintain the land portion rigidity of the tire axial both sides of tire shoulder longitudinal furrow 9, guarantees control stability and anti-partial wear performance further.In addition, above-mentioned each angle θ 1, θ 2 refer to by normal 19a or 19b of the chamfering shape arc surface 16 or 18 by each outer rim 13a or 14a, the angle that formed with each furrow bank 13 or 14.
Wherein, when the difference θ 2-θ 1 of above-mentioned angle is excessive, because the ground contact area of the ground connection side of above-mentioned tire shoulder longitudinal furrow 9 reduces, therefore there is the possibility being difficult to play control stability, contrary to above-mentioned differential seat angle θ 2-θ 1 reduces, there is the possibility that cannot play above-mentioned action effect.According to such viewpoint, above-mentioned differential seat angle θ 2-θ 1 is preferably more than 1 degree, is more preferably more than 2 degree, and is preferably less than 10 degree, is more preferably less than 6 degree.
In addition, as shown in Figure 2, in each tire-shoulder land portion 12, tire-shoulder transverse groove 10 to connect between above-mentioned tire shoulder longitudinal furrow 9 and ground terminal Te and arranges along tire circumference interval.The tire-shoulder land portion 12 of present embodiment thus, is formed along the pattern block on tire shoulder row 12R of tire circumferential array by by pattern block on tire shoulder B1.Wherein, the arranged spacing of the tire-shoulder transverse groove 10 of present embodiment is different in tire axial both sides.That is, by a side large for spacing is set to vehicle outside, contribute to thus being decreased through noise, and act on the ground contact area in the tire-shoulder land portion 12 of the vehicle outside of larger centnifugal force when can guarantee to rotate, contribute to improving control stability.
In addition, the tire-shoulder transverse groove 10 of present embodiment forms arc-shaped.Thus, do not rely on the rotational angle of vehicle, can play the edge effect of tire-shoulder transverse groove 10 yet.In addition, in each tire-shoulder land portion 12, tire-shoulder transverse groove 10 is circumferential relative to tire to tilt to equidirectional (being bottom right in the present embodiment), but different to the direction that tire circumference is protruded.That is, the tire-shoulder transverse groove 10a being located at tire-shoulder land portion 12, left side is in fig. 2 formed as protruding towards the top of paper, on the other hand, is formed at the tire-shoulder transverse groove 10b in tire-shoulder land portion 12, right side, is formed as protruding towards the below of paper.Such air-inflation tyre, by the impact in tire rotation direction, can not maintain higher anti-partial wear performance and edge effect.
In addition, the formation of above-mentioned tire-shoulder transverse groove 10 comprises: narrow width part 21, and it is located at above-mentioned tire shoulder longitudinal furrow 9 side and has the ditch width less than the average groove width degree of this tire-shoulder transverse groove 10; With the wide width part 22 of ditch wider width, it is connected with this narrow width part 21 and extends to ground terminal Te side.
In the present embodiment, according to such ditch shape, as shown in Figure 2, above-mentioned many tire-shoulder transverse groove 10 are preferably formed to: above-mentioned tire shoulder longitudinal furrow 9 and the summation ∑ 4a of the ditch width W4a at the midway location m1 place of the tire axial of ground terminal Te, be greater than the summation ∑ 4b of the A/F W4b at above-mentioned tire shoulder longitudinal furrow 9 place opening.The rigidity of the tire equator C side in the tire-shoulder land portion 12 relatively raised due to the earth contact pressure such as when such tire-shoulder transverse groove 10 can maintain rotation, therefore easily maintains the drainage performance of ground terminal Te side, and easily guarantees control stability and anti-partial wear performance.In addition, because the ditch being located at tire shoulder longitudinal furrow 9 side is the narrow width part 21 that ditch volume is less, be therefore easy to suppress the rubber to the furrow bank outer rim 14a of tire shoulder longitudinal furrow 9 to flow.Wherein, above-mentioned midway location m1 is the position of the line of centers G1 of tire shoulder longitudinal furrow 9 and the centre of ground terminal Te.
At this, as the summation ∑ 4b, too small (namely with the ratio ∑ 4b/ ∑ 4a of the summation ∑ 4a of the ditch width W4a at above-mentioned midway location of above-mentioned A/F W4b, the summation of A/F is too small compared with the summation of the ditch width of midway location) time, there is the possibility that drainage performance reduces, contrary when above-mentioned more excessive than ∑ 4b/ ∑ 4a time, there is the possibility of control stability and anti-partial wear performance and noiseproof feature reduction.According to such viewpoint, be above-mentionedly preferably more than 10% than ∑ 4b/ ∑ 4a, be more preferably more than 15%, and be preferably less than 85%, be more preferably less than 70%.
In order to play above-mentioned action effect more reliably, the A/F W4b of above-mentioned narrow width part 21 is preferably more than 0.5mm, is more preferably more than 0.7mm, and is preferably below 6.0mm, is more preferably below 5.0mm.According to same viewpoint, the ditch width W4a of the midway location of the tire axial of tire-shoulder transverse groove 10 is preferably more than 2.0mm, is more preferably more than 2.5mm, and is preferably below 8.0mm, is more preferably below 7.0mm.
In addition, the length L4b of the tire axial of above-mentioned narrow width part 21 is preferably more than 5% of the tire axial length LA in tire-shoulder land portion 12, is more preferably more than 10%, and is preferably less than 50%, is more preferably less than 40%.
In addition, as shown in Figure 2, in the present embodiment, between tire-shoulder transverse groove 10,10 adjacent in tire circumference, the tire sipe 23 tilted to the direction identical with this tire-shoulder transverse groove 10 is formed.In the present embodiment, this tire sipe 23 is closed knife grooves that two ends form terminal in tread.This contributes to maintaining the rigidity in higher tire-shoulder land portion 12.
In addition, the ditch wall 22b recessed along tire circumference of the wide width part 22 of present embodiment is formed with traverse furrow chamfered section 22c, and it is to the incision of tilting between this ditch wall 22b and the tread 12n in tire-shoulder land portion 12.The rigidity that when such tire-shoulder transverse groove 10 contributes to guaranteeing driving/braking, the tire-shoulder land portion 12 of the ditch wall 22b side of the shear strength that effect is larger is higher.
In addition, as shown in Figure 1 and Figure 5, wide width part 22 has the oblique groove bottom surface 22a increased gradually towards the ground terminal Te lateral sulcus degree of depth.Specifically, the oblique groove bottom surface 22a of present embodiment is formed at the inner end surface 22d of the tire axial of wide width part 22.Such oblique groove bottom surface 22a can suppress the rubber flowing between the above-mentioned inner end surface 22d that caused by the projection of mould during vulcanization forming and tire-shoulder transverse groove 9, and the rubber thickness in the outside of tire-shoulder transverse groove 9 can be suppressed to rise.
According to the viewpoint playing above-mentioned action effect, the tilt angle alpha 1 of oblique groove bottom surface 22a is preferably more than 5 degree, is more preferably more than 10 degree, and is preferably less than 60 degree, is more preferably less than 50 degree.Wherein, above-mentioned tilt angle alpha 1 be oblique groove bottom surface 22a and wide width part 22 tire axial in the normal 19c angulation of ora terminalis 22e.
In addition, as shown in Figure 2, in above-mentioned central land portion 11,1 central longitudinal furrow 25 is respectively set in the both sides of tire equator C.This central longitudinal furrow 25 comprises: the straight line longitudinal furrow 26 extended continuously with linearity along tire circumference and the arc sections 27a that protrudes towards tire equator C are along the wavy longitudinal furrow 27 of tire circumference continuous print.Thus, central land portion 11 is divided into three land portion, that is: the first pattern block row 28 extended between straight line longitudinal furrow 26 and tire shoulder longitudinal furrow 9, the center rib 29 extended between straight line longitudinal furrow 26 and wavy longitudinal furrow 27, the second pattern block row 30 extended between wavy longitudinal furrow 27 and tire shoulder longitudinal furrow 9.
Straight line longitudinal furrow 26 and the wavy longitudinal furrow 27 of present embodiment are arranged on the position of central land portion 11 being carried out roughly 3 deciles along tire axial.
Above-mentioned first pattern block row 28 are arranged along tire circumference interval by the first center running lug B2 to form, and described first center running lug B2 is by straight line longitudinal furrow 26, tire shoulder longitudinal furrow 9 and such as form with first of arc-shaped extension the central oblique groove 31 division relative to tire axial inclination between which.On above-mentioned first center running lug B2, on the pattern block edge E2 of the acute side formed being intersected with the first central oblique groove 31 by above-mentioned straight line longitudinal furrow 26, when top view is set, be roughly the chamfered section 32 of triangle.Thus, improve the rigidity of the first center running lug B2, and improve anti-partial wear performance.
In addition, the first central oblique groove 31 of present embodiment, tilt to the direction identical with the above-mentioned tire-shoulder transverse groove 10 adjacent across tire shoulder longitudinal furrow 9 (in the present embodiment, having a down dip to the right) is arranged.Like this first central oblique groove 31, can reliably export to tire shoulder longitudinal furrow 9 by the moisture film near tire equator C, thus improves drainage.
Above-mentioned center rib 29 is formed as the smooth flank not arranging substantial ditch or tire sipe.When guaranteeing thus to keep straight on traveling, the rigidity of the tire equator C side that earth contact pressure is the highest, improves craspedodrome stability.
Above-mentioned second pattern block row 30, be such as arranged along tire circumference interval by the second center running lug B3 and formed, described second center running lug B3 is divided by the second central oblique groove 33 tilting to extend relative to tire axial from the end of the respective arc sections 27a of wavy longitudinal furrow 27, tire shoulder longitudinal furrow 9 and above-mentioned wavy longitudinal furrow 27 to tire shoulder longitudinal furrow 9 and forms.Wherein, on above-mentioned second center running lug B3, the pattern block edge E3 of the acute side of being intersected by above-mentioned tire shoulder longitudinal furrow 9 and the second central oblique groove 33 and being formed arranges the chamfered section 34 of roughly triangular shape during top view.The rigidity of the second center running lug B3 can be improved thus, improve anti-partial wear performance.
In addition, the second center running lug B3 of present embodiment arranges two ancillary oblique ditches 35, and this ancillary oblique ditch 35 extends inside tire axial from above-mentioned tire shoulder longitudinal furrow 9, and is not communicated with above-mentioned wavy longitudinal furrow 27 but forms terminal.Above-mentioned ancillary oblique ditch 35 tilts to the direction identical with the above-mentioned tire-shoulder transverse groove 10 adjacent across above-mentioned tire shoulder longitudinal furrow 9, and (in the present embodiment for having a down dip to the right) is arranged.In addition, ancillary oblique ditch 35 length adjacent along tire circumference of present embodiment is different, but also can be formed as equal length.Improve the drainage of the second center running lug B3 thus.
In addition, as shown in Figure 2, the arc sections 27a of present embodiment, is arranged smoothly with the spacing of roughly 2 times of the tire circumference spacing across the adjacent tire-shoulder transverse groove 10 of above-mentioned tire shoulder longitudinal furrow 9.The rigidity in central land portion 11 can be guaranteed thus, and effectively the moisture film on road surface is discharged to tire outer circumferential.
In addition, as shown in Figure 1, ditch width W2, W3 of above-mentioned straight line longitudinal furrow 26 and wavy longitudinal furrow 27 and trench depth D2, D3, though non-particular determination, but from the view point of guaranteeing the rigidity in drainage performance and central land portion 11, ditch width W2, W3 are preferably 1.5 ~ 5.0mm, and trench depth D2, D3 are preferably 2.5 ~ 8.0mm.
In addition, Fig. 6 represents the expansion drawing of the fetus face 2 of other embodiments of the present invention.The tire-shoulder transverse groove 10 of present embodiment does not arrange above-mentioned narrow width part 21, and at above-mentioned tire shoulder longitudinal furrow 9 place not opening but formed terminal.Such air-inflation tyre, can maintain the rigidity that the land portion of tire shoulder longitudinal furrow 9 both sides is higher, is but difficult to but then suppress rubber flowing.
Above, although be described in detail embodiments of the present invention, but the present invention is not limited to graphic embodiment, also can be deformed into various mode to implement.
Embodiment:
Specification based on table 1 has manufactured experimently the car air-inflation tyre of the size 175/65R15 with the internal structure of Fig. 1 and the tread contour of Fig. 2, and tests road-holding property etc.The internal structure of tire is identical.Each specification is as follows.
Tread width TW:130mm
The ditch width W1:10.0mm of tire shoulder longitudinal furrow
The trench depth D1:8.2mm of tire shoulder longitudinal furrow
The equipping position L1/TW:23% of tire shoulder longitudinal furrow
The angle θ 1:15 degree of the furrow bank of the tire equator side of tire shoulder longitudinal furrow
The length ratio L4b/LA:21% of the narrow width part of tire-shoulder transverse groove
The ditch width W2:2.9mm of straight line longitudinal furrow
The ditch width W3:3.0mm of wavy longitudinal furrow
The trench depth D2:6.4mm of straight line longitudinal furrow
The trench depth D3:6.4mm of wavy longitudinal furrow
The radius of curvature R a:380mm of inner side tyre surface reference plane
The radius of curvature R d:240mm of outside tyre surface reference plane
Test method is as follows.
(road-holding property)
After the wheel rim of pressing 230kPa to 15 × 5JJ within testing tire is carried out wheel rim assembling, be installed on two front-wheels of the front wheel drive car of free air capacity 1300cc, only driven to run at high speed on the dry asphalt coating of the Tire testing route of a circle 800m by chaufeur, and adopt the road-holding property of 10 point-scores to each testing tire to evaluate by the sense evaluation of chaufeur.The larger road-holding property of numerical value is more superior.
(anti-partial wear)
Be installed on two front-wheels of each testing tire with vehicle condition same as described above, dried asphalt road travels 3000km, and respectively three position findings in tire circumference: at the ratio R2 of the abrasion loss of the outer end of tire axial of the inner side tyre surface reference plane of the same position of tire circumference and the ratio R1 of abrasion loss of the outer rim of the furrow bank of tire equator side and the outer rim of the inner of tire axial of outside tyre surface reference plane and the furrow bank of ground connection side, and calculate the difference of the aviation value of the ratio R1 of above-mentioned abrasion loss and the aviation value of R2.The index that its result is 100 with the inverse of comparative example 1 represents.The less performance of numerical value larger expression partial wear amount is better.In addition, the air-inflation tyre of comparative example 1, is located at upper/lower positions by above-mentioned outer end and the inner, namely moves the position of 60mm from the outer rim of the furrow bank of the outer rim of the furrow bank of tire equator side and ground connection side to tire equator side and ground terminal side.
(drainage)
Testing tire is installed on two front-wheels of testing vehicle with above-mentioned condition, the wet asphalt coating of only being driven to be provided with on above-mentioned Tire testing route the depth of water 1 ~ 2mm by chaufeur travels, by the sense evaluation of chaufeur, the index being 100 by comparative example 1 represents.The larger drainage of numerical value is better.
(passing through noise testing)
With the real vehicle coasting test of JASO/C/606 defined for foundation, on the test route (asphalt coating) of linearity, the distance travelling 50m is slided with the Negotiation speed of 60km/h, and by the intermediate point at route from traveling line of centers to side 7.5m, and apart from the fixing microphone that the position of road surface 1.2m is arranged, determine the greatest level dB (A) by noise.Its result, represents with the index that the inverse of comparative example 1 is 100, index is larger better by the less performance of noise.
The result of test is shown in table 1.
Table 1
The tire of the results verification embodiment of test obtains good result compared with comparative example.The ground connection shape (being shown in Fig. 7) of embodiments of the invention 1, compared with airtyred ground connection shape (being shown in Fig. 9) in the past, from the circumferential two ends of tire shoulder longitudinal furrow to outside two, with the part of horn shape protrusion, (the tire circumferential lengths LB of ground plane and tire axial position do not have nothing to do, roughly certain), therefore, it is possible to it is even to understand earth contact pressure.
Claims (7)
1. an air-inflation tyre, having extending continuously and ditch width is the tire shoulder longitudinal furrow of 5.0 ~ 20.0mm along tire circumference near ground connection side at fetus face, it is characterized in that,
Be installed on regular wheel rim and be filled with on the tyre equatorial cross section of the tire rotation axle of the zero load of 5% of regular interior pressure that is interim installing condition comprising,
The profile of the tread of above-mentioned fetus face comprises:
Inside portion, it extends inside tire axial from the outer rim of the furrow bank of the tire equator side of above-mentioned tire shoulder longitudinal furrow; And
Outside portion, it extends outside tire axial from the outer rim of the furrow bank of the ground connection side of above-mentioned tire shoulder longitudinal furrow,
Above-mentioned inside portion comprises:
Inner side tyre surface reference plane, it is by being configured in tire equator side and the circular arc of the radius of curvature (Ra) protruded to tire radial outside is formed; And
Inner side chamfering shape arc surface, it is by the outer rim of the outer end of tire axial and the furrow bank of above-mentioned tire equator side that connect above-mentioned inner side tyre surface reference plane, and the circular arc that radius of curvature (Rb) is less than the above-mentioned radius of curvature (Ra) protruded to tire radial outside is formed
Above-mentioned outside portion comprises:
Outside tyre surface reference plane, it is by being configured in ground connection side and the circular arc of the radius of curvature (Rd) protruded to tire radial outside is formed; And
Outside chamfering shape arc surface, it is by the outer rim of the inner of tire axial and the furrow bank of above-mentioned ground connection side of connecting above-mentioned outside tyre surface reference plane, and the circular arc that radius of curvature (Rc) is less than the above-mentioned radius of curvature (Rd) protruded to tire radial outside is formed, and
Outside depth of chamfering (yo) is greater than inner side depth of chamfering (yi), wherein outside depth of chamfering (yo) is the outside imagination circular arc extended inside tire axial by above-mentioned outside tyre surface reference plane, and the normal direction distance relative to above-mentioned outside imagination circular arc between the outside chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned ground connection side, inner side depth of chamfering (yi) is by the inner side imagination circular arc of above-mentioned inner side tyre surface reference plane to tire axial lateral, with the normal direction distance relative to above-mentioned inner side imagination circular arc of the above-mentioned inner side chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned equator side.
2. air-inflation tyre according to claim 1, wherein,
Have many tire-shoulder transverse groove at above-mentioned fetus face, they extend towards above-mentioned tire shoulder longitudinal furrow from than ground terminal by exceeding this ground terminal the position outside tire axial, and arrange along tire circumference interval,
Above-mentioned many tire-shoulder transverse groove are at above-mentioned tire shoulder longitudinal furrow place opening, and the summation of the ditch width of the midway location of the tire axial of above-mentioned tire shoulder longitudinal furrow and ground terminal, be greater than the summation of the A/F at above-mentioned tire shoulder longitudinal furrow place opening.
3. air-inflation tyre according to claim 2, wherein,
The summation of the above-mentioned A/F of above-mentioned tire-shoulder transverse groove is, 10% ~ 85% of the summation of the ditch width of above-mentioned midway location.
4. the air-inflation tyre according to Claims 2 or 3, wherein,
Above-mentioned tire-shoulder transverse groove has the ditch width narrow width part less than the average groove width degree of this tire-shoulder transverse groove in above-mentioned tire shoulder longitudinal furrow side.
5. air-inflation tyre according to claim 4, wherein,
Above-mentioned tire-shoulder transverse groove comprises: above-mentioned narrow width part and being connected with this narrow width part and the wide width part of the ditch wider width extended to ground connection side,
Above-mentioned wide width part has the oblique groove bottom surface increased gradually towards the ground terminal lateral sulcus degree of depth.
6. air-inflation tyre according to claim 1, wherein,
Above-mentioned fetus face has many tire-shoulder transverse groove, and they exceed this ground terminal towards above-mentioned tire shoulder longitudinal furrow extension and along the interval setting of tire circumference from than ground terminal by the position outside tire axial,
Above-mentioned tire-shoulder transverse groove at above-mentioned tire shoulder longitudinal furrow place not opening but formed terminal.
7. air-inflation tyre according to claim 1, wherein,
Above-mentioned tire shoulder longitudinal furrow, the angle of the furrow bank of its equator side is less than the angle of the furrow bank of ground connection side.
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| JP2010096246A JP5123980B2 (en) | 2010-04-19 | 2010-04-19 | Pneumatic tire |
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| FR2983780B1 (en) * | 2011-12-08 | 2014-01-10 | Michelin Soc Tech | VARIABLE CHANNEL ROLLER BEARING |
| JP5658728B2 (en) * | 2012-11-20 | 2015-01-28 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6088335B2 (en) * | 2013-04-12 | 2017-03-01 | 株式会社ブリヂストン | Pneumatic tire |
| JP6153763B2 (en) * | 2013-04-23 | 2017-06-28 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP5827669B2 (en) * | 2013-12-04 | 2015-12-02 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6031055B2 (en) * | 2014-03-11 | 2016-11-24 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6292067B2 (en) * | 2014-07-25 | 2018-03-14 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6526402B2 (en) | 2014-10-27 | 2019-06-05 | 株式会社ブリヂストン | Pneumatic tire |
| JP6482396B2 (en) * | 2015-06-15 | 2019-03-13 | 株式会社ブリヂストン | Pneumatic tire |
| JP6720986B2 (en) * | 2016-01-29 | 2020-07-08 | 横浜ゴム株式会社 | Pneumatic tire and method for manufacturing pneumatic tire |
| JP6793021B2 (en) * | 2016-12-02 | 2020-12-02 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| JP6891559B2 (en) * | 2017-03-15 | 2021-06-18 | 住友ゴム工業株式会社 | Pneumatic tires |
| CN111655516B (en) * | 2018-01-30 | 2022-08-05 | 横滨橡胶株式会社 | Pneumatic tire |
| CN109747343A (en) * | 2019-03-06 | 2019-05-14 | 正新橡胶（中国）有限公司 | A kind of tire |
| JP7363208B2 (en) * | 2019-08-30 | 2023-10-18 | 住友ゴム工業株式会社 | tire |
| JPWO2021117653A1 (en) * | 2019-12-13 | 2021-06-17 | ||
| JP7505188B2 (en) * | 2020-01-23 | 2024-06-25 | 住友ゴム工業株式会社 | Tire mold, tire manufacturing method, and tire |
| CN111361359A (en) * | 2020-05-06 | 2020-07-03 | 正新橡胶（中国）有限公司 | Tire and cover tire thereof |
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| JPH1044715A (en) * | 1996-07-31 | 1998-02-17 | Bridgestone Corp | Pneumatic radial tire |
| JPH10258612A (en) * | 1997-03-18 | 1998-09-29 | Yokohama Rubber Co Ltd:The | Pneumatic radial tyre for heavy load |
| JP4634644B2 (en) * | 2001-05-22 | 2011-02-16 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP2005162145A (en) * | 2003-12-05 | 2005-06-23 | Bridgestone Corp | Pneumatic tire |
| WO2010041720A1 (en) * | 2008-10-08 | 2010-04-15 | 株式会社ブリヂストン | Tire |
| CN101797872A (en) * | 2009-02-06 | 2010-08-11 | 住友橡胶工业株式会社 | Heavy duty tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102218976A (en) | 2011-10-19 |
| JP2011225084A (en) | 2011-11-10 |
| JP5123980B2 (en) | 2013-01-23 |
| KR20110116977A (en) | 2011-10-26 |
| KR101720801B1 (en) | 2017-03-28 |
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