CN102218976A - Pneumatic tyre - Google Patents
Pneumatic tyre Download PDFInfo
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- CN102218976A CN102218976A CN2011101005526A CN201110100552A CN102218976A CN 102218976 A CN102218976 A CN 102218976A CN 2011101005526 A CN2011101005526 A CN 2011101005526A CN 201110100552 A CN201110100552 A CN 201110100552A CN 102218976 A CN102218976 A CN 102218976A
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- tire
- furrow
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- tire shoulder
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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 profile, suppress the reduction of drainage and improve the air-inflation tyre that operation stabilization performance, noiseproof feature and anti-eccentric wear decrease performance by the tread that improves fetus face.
Background technology
In the past, decrease performance in order to improve operation stabilization performance and anti-eccentric wear, known have a following air-inflation tyre: as the tread profile of airtyred fetus face, a plurality of circular arcs that radius of curvature is different connect smoothly.In addition, in order to ensure drainage performance, and the bigger longitudinal furrow of ditch width circumferentially is set continuously along tire.
Yet, this air-inflation tyre, as Fig. 8 (a) with (b), when tyre vulcanization was shaped, the be formed projection of mould k of longitudinal furrow h of unvulcanized tread-rubber g was pushed, and the rubber that produces to its two side shifting flows.Therefore there be the tendency of the rubber thickness tb of longitudinal furrow both sides, sulfuration back greater than target thickness ta.In addition, when tire ground connection, because the switching (opening) of longitudinal furrow, the outer rim of the furrow bank of this longitudinal furrow can become the state of so-called coign sometimes.Owing to these reasons, air-inflation tyre in the past as the A portion of Fig. 9 clear and definite, it is to understand like that to increase this point 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 inhomogeneous, therefore exists operation stabilization performance and eccentric wear to decrease the tendency that performance reduces.In addition, for opening,, therefore there is tendency easy to wear because the flare of tire tread contour causes the ground connection of longitudinal furrow distolateral bigger.Correlation technique is as follows.
Patent documentation 1: TOHKEMY 2009-23601 communique
Summary of the invention
The present invention makes in view of above problem, the ditch width that its main purpose is to provide a kind of profile of the tread that limits fetus face with the tire axial both sides at the tire shoulder longitudinal furrow and limits the tire shoulder traverse furrow serve as basic, can suppress the reduction of drainage and improve the air-inflation tyre of operation stabilization performance, noiseproof feature and anti-eccentric wear damage performance.
Technical scheme 1 described invention is a kind of air-inflation tyre among the present invention, having distolateral the most close ground connection at fetus face is the tire shoulder longitudinal furrow of 5.0～20.0mm along circumferentially continuous extension of tire and ditch width, it is characterized in that, be installed on regular wheel rim and filled on the tire radial cross section of tire S. A. of 5% the zero load that is interim installing condition of pressing in regular comprising, the profile of the tread of above-mentioned fetus face comprises: the inside portion, and its outer rim from the furrow bank of the tire equator side of above-mentioned tire shoulder longitudinal furrow is extended to the tire axial inboard; And outside portion, its outer rim from the distolateral furrow bank of the ground connection of above-mentioned tire shoulder longitudinal furrow is extended to the tire axial outside, above-mentioned inside portion comprises: inboard tyre surface reference plane, and its circular arc by the radius of curvature R a that is configured in the tire equator side and protrudes to the tire radial outside constitutes; And inboard chamfering shape arc surface, it is by the outer rim of the furrow bank of the outer end of the tire axial that connects above-mentioned inboard tyre surface reference plane and above-mentioned tire equator side, and the circular arc that radius of curvature R b is littler than the above-mentioned radius of curvature R a that protrudes to the tire radial outside constitutes, above-mentioned outside portion comprises: outside tyre surface reference plane, and it constitutes by being configured in distolateral and circular arc radius of curvature R d that protrude to the tire radial outside of ground connection; And outside chamfering shape arc surface, it is by the outer rim of the distolateral furrow bank of the inner of the tire axial that connects above-mentioned outside tyre surface reference plane and above-mentioned ground connection, and the circular arc that radius of curvature R c is littler than the above-mentioned radius of curvature R d that protrudes to the tire radial outside constitutes, and outside chamfering depth y o is greater than inboard chamfering depth y i, wherein chamfering depth y o in the outside is to the inboard outside imagination circular arc that prolongs of tire axial with above-mentioned outside tyre surface reference plane, and the normal direction distance between the outside chamfering shape arc surface of the outer fringe position of the furrow bank that above-mentioned ground connection is distolateral with respect to above-mentioned outside imagination circular arc, inboard chamfering depth y i is the inboard imaginary circular arc that above-mentioned inboard tyre surface reference plane is prolonged to the tire axial outside, normal direction distance with the above-mentioned inboard chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned equator side with respect to the imaginary circular arc in above-mentioned inboard.
In addition, technical scheme 2 described inventions are on technical scheme 1 described airtyred basis, have many tire shoulder traverse furrows at above-mentioned fetus face, they are from axially extending towards above-mentioned tire shoulder longitudinal furrow above this ground terminal the position in the outside than ground terminal roller tire, and circumferentially be provided with at interval along tire, above-mentioned many tire shoulder traverse furrows 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 at the A/F of above-mentioned tire shoulder longitudinal furrow place opening.
In addition, technical scheme 3 described inventions are that the summation of the above-mentioned A/F of above-mentioned tire shoulder traverse furrow is 10%～85% of the summation of the ditch width of above-mentioned midway location on technical scheme 2 described airtyred bases.
In addition, technical scheme 4 described inventions are on technical scheme 2 or 3 described airtyred bases, have the average ditch width little narrow width part of ditch width than this tire shoulder traverse furrow in above-mentioned tire shoulder longitudinal furrow side.
In addition, technical scheme 5 described inventions are on technical scheme 4 described airtyred bases, above-mentioned tire shoulder traverse furrow comprises: above-mentioned narrow width part be connected with this narrow width part and to the wide width part of the ditch width broad of the distolateral extension of ground connection, above-mentioned wide width part has the inclination ditch bottom surface that increases gradually towards the ground terminal lateral sulcus degree of depth.
In addition, technical scheme 6 described inventions are on technical scheme 1 described airtyred basis, on above-mentioned fetus face, have many tire shoulder traverse furrows, they are from axially extending and circumferentially be provided with at interval along tire towards above-mentioned tire shoulder longitudinal furrow above this ground terminal in the position in the outside than ground terminal roller tire, and above-mentioned tire shoulder traverse furrow is opening but form terminal not at above-mentioned tire shoulder longitudinal furrow place.
In addition, technical scheme 7 described inventions are on the described airtyred basis of 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 distolateral furrow bank of ground connection.
Air-inflation tyre of the present invention has: the ditch width is the wideer tire shoulder longitudinal furrow of the ditch width of 5.0～20.0mm and from axially manying a tire shoulder traverse furrow above ground terminal towards what above-mentioned tire shoulder longitudinal furrow extended in the position in the outside than ground terminal roller tire.Since such air-inflation tyre can be reliably with the ground-surface moisture film to tire week laterally with tire axial outside draining, therefore can keep higher drainage performance.
In addition, the profile of the tread of airtyred fetus face of the present invention comprises: the inside portion, and its furrow bank outer rim from the tire equator side of tire shoulder longitudinal furrow is extended to the tire axial inboard; And the outside portion, it extends to the tire axial outside from the distolateral furrow bank outer rim of the ground connection of above-mentioned tire shoulder longitudinal furrow.The inside portion comprises: inboard tyre surface reference plane, and its circular arc by the radius of curvature R a that is configured in the tire equator side and protrudes to the tire radial outside constitutes; And inboard chamfering shape arc surface, it is by the outer end of the tire axial that connects this inboard tyre surface reference plane and the outer rim of the furrow bank of above-mentioned tire equator side, and the radius of curvature R b circular arc formation littler than the above-mentioned radius of curvature R a that protrudes to the tire radial outside.In addition, the outside portion comprises: outside tyre surface reference plane, and it constitutes by being configured in distolateral and circular arc radius of curvature R d that protrude to the tire radial outside of ground connection; And outside chamfering shape arc surface, it is by the outer rim of the distolateral furrow bank of the inner of the tire axial that connects above-mentioned outside tyre surface reference plane and above-mentioned ground connection, and the radius of curvature R c circular arc formation littler than the above-mentioned radius of curvature R d that protrudes to the tire radial outside.Such air-inflation tyre, by inboard and outside chamfering shape arc surface, the earth contact pressure of earth contact pressure than the outer rim both sides of the tire shoulder longitudinal furrow that is easier to increase can be reduced, therefore the earth contact pressure of whole ground plane be become evenly, thereby improve operation stabilization performance and anti-eccentric wear damage performance.
In addition, airtyred tire tread contour of the present invention, outside chamfering depth y o forms greater than inboard chamfering depth y i, described outside chamfering depth y o is to the inboard outside imagination circular arc that prolongs of tire axial with outside tyre surface reference plane, and the normal direction distance between the outside chamfering shape arc surface of the outer fringe position of the furrow bank that ground connection is distolateral with respect to above-mentioned outside tyre surface reference plane, described inboard chamfering depth y i is the inboard imaginary circular arc that inboard tyre surface reference plane is prolonged to the tire axial outside, normal direction distance with the inboard chamfering shape arc surface of the outer fringe position of the furrow bank of equator side with respect to above-mentioned inboard tyre surface reference plane.Such air-inflation tyre can make than the tire equator side of tire shoulder longitudinal furrow more be abutted against ground distolateral earth contact pressure further reduce.Therefore, the earth contact pressure in the distolateral furrow bank outer rim of the ground connection of the tire shoulder longitudinal furrow that easily produces coign is reduced, and then make earth contact pressure more even, thereby further improve road-holding property and anti-eccentric wear damage performance.
Description of drawings
Fig. 1 is the airtyred cutaway view of expression an embodiment of the invention.
Fig. 2 is the expansion drawing of fetus face.
Fig. 3 is near the amplification view its tire shoulder longitudinal furrow.
Fig. 4 is the cutaway view that the tire shoulder longitudinal furrow is further amplified.
Fig. 5 is the block diagram of tire shoulder traverse furrow.
Fig. 6 is the expansion drawing of the fetus face of other embodiments of the present invention.
Fig. 7 is the figure of ground connection shape of the airtyred front-wheel of expression an embodiment of the invention.
The figure that near longitudinal furrow when Fig. 8 (a) is the pneumatic tire vulcanization that illustrates in the past rubber flows (b) is near the figure of the shape the longitudinal furrow that illustrates after vulcanizing.
Fig. 9 is the figure that represents the ground connection shape of airtyred front-wheel in the past.
Nomenclature among the figure:
1... air-inflation tyre; 2... fetus face; 2n... the tread of fetus face; 9... tire shoulder longitudinal furrow; 10... tire shoulder traverse furrow; 13... the furrow bank of the tire equator side of tire shoulder longitudinal furrow; 13a... the furrow bank outer rim of the tire equator side of tire shoulder longitudinal furrow; 14... the furrow bank that the ground connection of tire shoulder longitudinal furrow is distolateral; 14a... the furrow bank outer rim that the ground connection of tire shoulder longitudinal furrow is distolateral; 15... inboard tyre surface reference plane; 15a... the outer end of the tire axial of inboard tyre surface reference plane; 15c... inboard imaginary circular arc; 16... inboard chamfering shape arc surface; 17... outside tyre surface reference plane; 17a... the inner of the tire axial of outside tyre surface reference plane; 17c... outside imagination circular arc; 18... outside chamfering shape arc surface; C... tire equator; Te... ground terminal; TP... profile.
The specific embodiment
Fig. 1 represents to comprise the cutaway view (the A-A line cutaway view of Fig. 2) of tire S. A. of the air-inflation tyre 1 of present embodiment, and Fig. 2 represents the expansion drawing of fetus face, and Fig. 3 represents near the amplification view the tire shoulder longitudinal furrow.In addition, the cutaway view of Fig. 1 be with tire to regular wheel rim (not shown) carry out wheel rim assembling and fill regular in the tire of 5% and uncharge interim installing condition of pressure.The tire face (omitting diagram) of the sulfurizing mould that interim installing condition like this forms with air-inflation tyre to present embodiment in fact is consistent.In addition, so interim installing condition, for example, by temporarily with mounting of tyre in wheel rim and filled press in regular after, reduce pressure and can easily obtain.In addition, under the situation of specified otherwise not, the size of each one of tire etc. is the value of measuring under this interim installing condition.
At this, above-mentioned " regular wheel rim " is meant, in the schematism of the specification that comprises tire institute foundation, each specification is by the wheel rim of each tire regulation, if JATMA then is " standard rim ", if TRA then is " Design Rim ", if ETRTO then is " Measuring Rim ".In addition, above-mentioned " pressing in regular " is in the schematism of the specification that comprises tire institute foundation, each specification is by the air pressure of each tire regulation, if JATMA then is " the highest air pressure ", if the maxim that TRA is then put down in writing for table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO then is " INFLATION PRESSURE ".
The air-inflation tyre of present embodiment (below, abbreviate " tire " sometimes as) 1, as shown in Figure 1, have: carcass 6, it arrives the bead core 5 of bead part 4 through sidewall portion 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 that car is used in the present embodiment.
Above-mentioned carcass 6 is made of 1 piece of (being 1 piece in the present embodiment) carcass cord 6A at least, and this carcass cord 6A has: main part 6a, and it is crossed between pair of bead core 5,5 with ring-type; Return portion 6b, its both sides with the 6a of aforementioned body portion are connected and turn back laterally from the tire axial inboard around above-mentioned bead core 5.The body cord that above-mentioned carcass cord 6A for example is made of organic fiber is with respect to tire equator C direction, for example arranges with 75 °～90 ° angle to form.In addition, between main part 6a and return portion 6b, the tyre bead triangle glue 8 that configuration is extended to the tire radial outside of this bead core 5 with taper from bead core 5, thereby reinforced bead portion 4.
Above-mentioned bracing ply 7 constitutes by two pieces at least, is in the present embodiment to be made of tire radially inside and outside two pieces of bracing ply cord 7A, 7B, and interior bracing ply cord 7A compares with outer bracing ply cord 7B, width form broad.Each bracing ply cord 7A, 7B have the elastomeric belt cords such as for example steel cord with 15 °～40 ° angle tilt with respect to tire equator C.And each bracing ply cord 7A, 7B are so that the cross one another mode of belt cord is overlapping.
As shown in Figure 1, on above-mentioned fetus face 2, be provided with: a pair of tire shoulder longitudinal furrow 9, they are distolateral along circumferentially extension continuously of tire the most close ground connection; Many tire shoulder traverse furrows 10, they are from more extending towards above-mentioned tire shoulder longitudinal furrow 9 above this ground terminal Te the position in the axial outside of roller tire than ground terminal Te.Thus, have dividing respectively on the above-mentioned fetus face 2: the central land portion 11 between the tire shoulder longitudinal furrow 9,9; And a pair of tire shoulder land portion 12 of between above-mentioned tire shoulder longitudinal furrow 9 and ground terminal Te, extending.
Wherein, above-mentioned ground terminal Te is defined as tire is loaded regular load to the air-inflation tyre 1 that regular wheel rim carries out wheel rim assembling and filled the normal state of pressing in regular, and spends when being grounding to the plane at the outermost earthing position of tire axial with camber angle 0.In addition, above-mentioned " regular load " is in the schematism of the specification that comprises tire institute foundation, each specification is by the load of each tire regulation, if JATMA then is " a peak load ability ", if the maxim that TRA is then put down in writing for table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO then is " LOAD CAPACITY ".But at tire is car with under the situation of tire, for being equivalent to 88% load of above-mentioned each load.
The tire shoulder longitudinal furrow 9 of present embodiment forms with linearity.Such tire shoulder longitudinal furrow 9, at the superior drainage performance of performance, and suppress the glancing impact vehicle rock or unsettled movement aspect such as deflection preferred especially.In addition, tire shoulder longitudinal furrow 9 can be a zig-zag or wavy for example, 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 be limited to the scope of 5.0～20.0mm.Under the situation of above-mentioned ditch width W1 less than 5.0mm, then can't obtain enough ditch volumes, can't guarantee basic drainage performance.Wet road superior performance on the contrary, surpasses under the situation of 20.0mm, though except easily reducing the rigidity of fetus face 2 significantly, beyond the anti-inclined to one side wearability of infringement, also can't adopt because of the road-holding property variation at the above-mentioned ditch width W1 of tire shoulder longitudinal furrow 9.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 trench depth D1 of tire shoulder longitudinal furrow 9 particular determination not, yet, be preferably more than the 6.0mm, more preferably more than the 7.0mm in order balancedly to guarantee the rigidity of drainage performance and each land portion 11,12, and be preferably below the 10.0mm, more preferably below the 9.0mm.The trench depth D1 of tire shoulder longitudinal furrow 9 be connect this tire shoulder longitudinal furrow 9 costa colpi line normal, with the ultimate range (being shown in Fig. 4) of the bottom of trench 9b of tire shoulder longitudinal furrow 9.
In addition, though the equipping position of tire shoulder longitudinal furrow 9 particular determination not, yet for example shown in Figure 2, the line of centers G1 of tire shoulder longitudinal furrow 9 and the tire axial distance L 1 between the tire equator C are preferably 20%～30% of tread width TW.Thus, balancedly guarantee the rigidity of each land portion 11,12, help to improve abrasion resistance and operation stabilization performance.In addition, a pair of tire shoulder longitudinal furrow 9 is preferred as present embodiment, and across tire equator C and line disposes symmetrically, yet 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 to be connected smoothly and formed by a plurality of circular arcs that radius of curvature is different.
In addition, as shown in Figure 3, the formation of above-mentioned profile TP comprises: inside portion TPa, and its outer rim 13a from the furrow bank 13 of the tire equator side of above-mentioned tire shoulder longitudinal furrow 9 extends to the tire axial inboard; Outside portion TPb, its outer rim 14a from the distolateral furrow bank 14 of the ground connection of above-mentioned tire shoulder longitudinal furrow 9 extends to the tire axial outside.
Above-mentioned inside portion TPa is connected inboard tyre surface reference plane 15 smoothly with inboard chamfering shape arc surface 16 and constitutes, described inboard tyre surface reference plane 15 is configured in the position of separating with above-mentioned tire shoulder longitudinal furrow 9 and in tire equator C side, and described inboard chamfering shape arc surface 16 couples together the outer rim 13a of the furrow bank 13 of the outer end 15a of the tire axial of above-mentioned inboard tyre surface reference plane 15 and above-mentioned tire equator side.
The inner 15b of the inboard tyre surface reference plane 15 of present embodiment on from above-mentioned outer end 15a to tire equator C formed by the mono-circular arc of the radius of curvature R a that protrudes to the tire radial outside.In addition, the center of the radius of curvature R a of above-mentioned inboard tyre surface reference plane 15 (not shown) is positioned on the tire equator C.
In addition, above-mentioned inboard chamfering shape arc surface 16 is in the present embodiment by protruding to the tire radial outside, and the radius of curvature R b mono-circular arc littler than the radius of curvature R a of above-mentioned inboard tyre surface reference plane 15 forms.In addition, because the center of inboard chamfering shape arc surface 16 is arranged on the line of the radius of curvature R a that passes above-mentioned outer end 15a, therefore inboard tyre surface reference plane 15 can be connected smoothly with inboard chamfering shape arc surface 16 and not have a curve.
Above-mentioned outside portion TPb is formed by connecting outside tyre surface reference plane 17 and outside chamfering shape arc surface 18 smoothly, described outside tyre surface reference plane 17 is configured in ground terminal Te side, and the outer rim 14a of the furrow bank 14 that described outside chamfering shape arc surface 18 is distolateral with the inner 17a of the tire axial of above-mentioned outside tyre surface reference plane 17 and above-mentioned ground connection couples together.
The outside tyre surface reference plane 17 of present embodiment is formed by the mono-circular arc of the radius of curvature R d that protrudes to the 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 inner 17a of tire axial of this outside tyre surface reference plane 17 and the position arbitrarily between the ground terminal Te.And, form the radius of curvature circular arc (not shown) littler than radius of curvature R d in its outside.
In addition, outside chamfering shape arc surface 18 is by protruding to the tire radial outside and radius of curvature R c forms than the little mono-circular arc of radius of curvature R d of above-mentioned outside tyre surface reference plane 17.Wherein, on the line that is centered close to the radius of curvature R d that passes 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 a 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 on the position of roller tire radially inner side more than the imaginary circular arc 15c in inboard and outside imagination circular arc 17c, the imaginary circular arc 15c in described inboard is the imaginary circular arc that inboard tyre surface reference plane 15 is prolonged to the tire axial outside, and described outside imagination circular arc 17c is the imaginary circular arc that outside tyre surface reference plane 17 is prolonged to the tire axial outside.Therefore, the rubber thickness t1 (being shown in Fig. 3) of tire shoulder longitudinal furrow 9 both sides, littler than in the past thickness, therefore can lower near the earth contact pressure tire shoulder longitudinal furrow 9 both sides that earth contact pressure originally easily rises, and then can make ground plane single-piece earth contact pressure become even.Therefore, air-inflation tyre 1 of the present invention further improves road-holding property and eccentric wear damage performance.
In addition, as shown in Figure 3, outside chamfering depth y o forms greater than inboard chamfering depth y i, described outside chamfering depth y o is the normal direction distance with respect to the imaginary circular arc 17c in the above-mentioned outside between the outside chamfering shape arc surface 18 of position of outer rim 14a of the distolateral furrow bank 14 of the outside imaginary circular arc 17c and ground connection, the normal direction distance with respect to the imaginary circular arc 15c in above-mentioned inboard between the above-mentioned inboard chamfering shape arc surface 16 of the position of the outer rim 13a of the furrow bank 13 that described inboard chamfering depth y i is inboard imaginary circular arc 15c and equator side.Such air-inflation tyre 1 can reduce effectively than the so-called coign of the easier generation of tire equator C side and the earth contact pressure of the ground terminal Te side of the easier excessive increase of earth contact pressure.Therefore, air-inflation tyre 1 of the present invention can make earth contact pressure more even, can further improve operation stabilization performance and anti-eccentric wear and decrease performance.
In order further to improve above-mentioned action effect, above-mentioned inboard chamfering depth y i is preferably more than the 0.05mm, more preferably more than the 0.1mm, and is preferably below the 1.0mm, more preferably below the 0.5mm.Equally, above-mentioned outside chamfering depth y o is preferably more than the 0.05mm, more preferably more than the 0.1mm, and is preferably below the 1.0mm, more preferably below the 0.5mm.
Wherein, when the difference yo-yi of above-mentioned outside chamfering depth y o and inboard chamfering depth y i was excessive, then near the ground contact area the tire axial of tire shoulder longitudinal furrow 9 outside significantly reduced, thereby existed operation stabilization performance and anti-eccentric wear to decrease the possibility that performance reduces.According to such viewpoint, the difference yo-yi of above-mentioned outside chamfering depth y o and inboard chamfering depth y i is preferably more than the 0.02mm, more preferably more than the 0.05mm, and is preferably below the 0.5mm, more preferably below the 0.3mm.
In addition, as shown in Figure 4, the imaginary inboard chamfering shape circular arc 16b that inboard chamfering shape arc surface 16 is prolonged to the tire axial outside, with outside chamfering shape arc surface 18 is made as imaginary intersection point K1 to the intersection point of the inboard imagination outside chamfering shape circular arc 18b that prolongs of tire axial.The normal direction distance of this imagination intersection point K1 and the imaginary circular arc 15c in inboard or outside imagination circular arc 17c that is flare depth D a, be preferably more than 0.015 with the ratio Da/D1 of the trench depth D1 of above-mentioned tire shoulder longitudinal furrow 9, more preferably more than 0.025, and be preferably below 0.12, more preferably below 0.075.When above-mentioned when surpassing 0.12 than Da/D1, because the ground contact area of the both sides of tire shoulder longitudinal furrow 9 reduces, therefore exist operation stabilization performance and anti-eccentric wear to decrease the possibility of degradation, on the contrary when above-mentioned be less than 0.015 the time than Da/D1, existence can't 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 of leaning on ground terminal Te side than the ditch center G1 of tire shoulder longitudinal furrow 9.Because such tire shoulder longitudinal furrow 9 is easily set above-mentioned outside chamfering depth y o greater than inboard chamfering depth y i, therefore easily make ground plane single-piece earth contact pressure even.
In addition, the radius of curvature R b of inboard chamfering shape arc surface 16 and the radius of curvature R a of inboard tyre surface reference plane 15 than Rb/Ra は, though particular determination not, yet the possibility that has the earth contact pressure of the tire equator C side that can't reduce tire shoulder longitudinal furrow 9 fully when excessive, on the contrary, when more too small than Rb/Ra, then near the ground contact areas the tire shoulder longitudinal furrow 9 significantly reduce when above-mentioned, therefore exist operation stabilization performance and anti-eccentric wear to decrease the possibility that performance reduces.According to such viewpoint, above-mentionedly be preferably more than 0.1 than Rb/Ra, more preferably more than 0.3, and be preferably below 0.9, more preferably below 0.7.
According to same viewpoint, the radius of curvature R c of above-mentioned outside chamfering shape arc surface 18 and the ratio Rc/Rd of the radius of curvature R d of outside tyre surface reference plane 17 are preferably more than 0.1, more preferably more than 0.3, and are preferably below 0.95, more preferably below 0.85.
Wherein, in order to bring into play above-mentioned action effect effectively, the radius of curvature R a of above-mentioned inboard tyre surface reference plane 15 is preferably more than the 250mm, more preferably more than the 300mm, and is preferably below the 1500mm, more preferably below the 1200mm.In addition, the radius of curvature R d of above-mentioned outside tyre surface reference plane 17 is preferably more than the 150mm, more preferably more than the 200mm, and is preferably below the 1200mm, more preferably below the 1000mm.
In addition, because outside chamfering depth y o is made as greater than inboard chamfering depth y i, therefore above-mentioned radius of curvature R c is preferably set to less than above-mentioned radius of curvature R b.Specifically, above-mentioned radius of curvature R c is preferably more than the 50mm, more preferably more than the 100mm, and be preferably below the 900mm, more preferably below the 700mm, similarly radius of curvature R b is preferably more than the 80mm, more preferably more than the 120mm, and be preferably below the 1000mm, more preferably below the 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 form less than the angle θ 2 of the distolateral furrow bank 14 of ground connection.Such tire shoulder longitudinal furrow 9 can make and especially easily produce the distolateral further passivation in bight of inclined to one side worn-down ground connection, and guarantees the rigidity of this part greatly.Therefore, the air-inflation tyre of present embodiment can balancedly be kept the land portion rigidity of the tire axial both sides of tire shoulder longitudinal furrow 9, guarantees that further operation stabilization performance and anti-eccentric wear decrease performance.In addition, above-mentioned each angle θ 1, θ 2 are meant the angle that forms by the normal 19a of the chamfering shape arc surface 16 by each outer rim 13a or 14a or 18 or 19b, with each furrow bank 13 or 14.
Wherein, when the difference θ of above-mentioned angle 2-θ 1 is excessive,, therefore there is the possibility that is difficult to performance operation stabilization performance because the distolateral ground contact area of the ground connection of above-mentioned tire shoulder longitudinal furrow 9 reduces, opposite when above-mentioned differential seat angle θ 2-θ 1 reduces, existence can't be brought into play the possibility of above-mentioned action effect.According to such viewpoint, above-mentioned differential seat angle θ 2-θ 1 be preferably 1 the degree more than, more preferably 2 the degree more than, and be preferably 10 the degree below, more preferably 6 the degree below.
In addition, as shown in Figure 2, in each tire shoulder land portion 12, circumferentially be provided with at interval between tire shoulder traverse furrow 10 above-mentioned tire shoulder longitudinal furrows 9 of connection and the ground terminal Te and along tire.The tire shoulder land portion 12 of present embodiment thus is by pattern block on tire shoulder B1 is constituted along the pattern block on tire shoulder row 12R of tire circumferential array.Wherein, the tire shoulder traverse furrow 10 of present embodiment sets spacing in tire axial both sides difference.That is, be made as vehicle outside, help thus to reduce by noise by the side that spacing is big, and the ground contact area of the tire shoulder land portion 12 of the vehicle outside of the big centnifugal force of effect can guarantee to rotate the time, help to improve the operation stabilization performance.
In addition, the tire shoulder traverse furrow 10 of present embodiment forms circular-arc.Thus, do not rely on the rotational angle of vehicle, can bring into play the edge effect of tire shoulder traverse furrow 10 yet.In addition, in each tire shoulder land portion 12, tire shoulder traverse furrow 10 circumferentially tilts to equidirectional (being the bottom right in the present embodiment) with respect to tire, yet to the circumferential direction difference of protruding of tire.That is, the tire shoulder traverse furrow 10a that is located at tire shoulder land, left side portion 12 in Fig. 2 forms above paper and protrudes, and on the other hand, is formed at the tire shoulder traverse furrow 10b of tire shoulder land, right side portion 12, forms towards the below of paper and protrudes.Such air-inflation tyre can not be subjected to the influence of tire hand of rotation, keeps higher anti-eccentric wear and decreases performance and edge effect.
In addition, the formation of above-mentioned tire shoulder traverse furrow 10 comprises: narrow width part 21, and it is located at above-mentioned tire shoulder longitudinal furrow 9 sides and has the ditch width littler than the average ditch width of this tire shoulder traverse furrow 10; With the wide width part 22 of ditch width broad, it links to each other 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 traverse furrows 10 are preferably formed and are: the above-mentioned tire shoulder longitudinal furrow 9 summation ∑ 4a with the ditch width W4a at the midway location m1 place of the tire axial of ground terminal Te, greater than the summation ∑ 4b at the A/F W4b of above-mentioned tire shoulder longitudinal furrow 9 place's openings.Because therefore the rigidity of the tire equator C side of the tire shoulder land portion 12 that earth contact pressure relatively raises when such tire shoulder traverse furrow 10 can be kept and rotate etc. is easily kept the drainage performance of ground terminal Te side, and is guaranteed that easily operation stabilization performance and anti-eccentric wear decrease performance.In addition, because the ditch that is located at tire shoulder longitudinal furrow 9 sides is the less narrow width part of ditch volume 21, therefore be easy to suppress flow to the rubber of the furrow bank outer rim 14a of tire shoulder longitudinal furrow 9.Wherein, above-mentioned midway location m1 line of centers G1 that is tire shoulder longitudinal furrow 9 and the position intermediate of ground terminal Te.
At this, as the summation ∑ 4b of above-mentioned A/F W4b, too small (promptly with ratio ∑ 4b/ ∑ 4a at the summation ∑ 4a of the ditch width W4a of above-mentioned midway location, the summation of A/F is compared too small with the summation of the ditch width of midway location) time, the possibility that exists drainage performance to reduce, opposite when more excessive, exist operation stabilization performance and anti-eccentric wear to decrease the possibility of performance and noiseproof feature reduction than ∑ 4b/ ∑ 4a when above-mentioned.According to such viewpoint, above-mentionedly be preferably more than 10% than ∑ 4b/ ∑ 4a, more preferably more than 15%, and be preferably below 85%, more preferably below 70%.
In order to bring into play above-mentioned action effect more reliably, the A/F W4b of above-mentioned narrow width part 21 is preferably more than the 0.5mm, more preferably more than the 0.7mm, and is preferably below the 6.0mm, more preferably below the 5.0mm.According to same viewpoint, the ditch width W4a of the midway location of the tire axial of tire shoulder traverse furrow 10 is preferably more than the 2.0mm, more preferably more than the 2.5mm, and is preferably below the 8.0mm, more preferably below the 7.0mm.
In addition, the length L 4b of the tire axial of above-mentioned narrow width part 21 is preferably more than 5% of tire axial length L A of tire shoulder land portion 12, more preferably more than 10%, and is preferably below 50%, more preferably below 40%.
In addition, as shown in Figure 2, in the present embodiment, between the tire shoulder traverse furrow 10,10 that tire week makes progress adjacent, form to the direction bevelled tire sipe 23 identical with this tire shoulder traverse furrow 10.In the present embodiment, this tire sipe 23 is two ends form terminal in tread closed knife grooves.This helps to keep the rigidity of higher tire shoulder land portion 12.
In addition, the wide width part 22 of present embodiment along being formed with traverse furrow chamfered section 22c on the circumferentially recessed ditch wall 22b of tire, carry out the bevelled incision between its tread 12n to this ditch wall 22b and tire shoulder land portion 12.Tire shoulder land portion 12 higher rigidity of the ditch wall 22b side of the shear strength that effect was bigger when such tire shoulder traverse furrow 10 helped to guarantee driving.
In addition, as Fig. 1 and shown in Figure 5, wide width part 22 has the inclination ditch bottom surface 22a that increases gradually towards the ground terminal Te lateral sulcus degree of depth.Specifically, the inclination ditch bottom surface 22a of present embodiment is formed at the inner end surface 22d of the tire axial of wide width part 22.Above-mentioned inner end surface 22d that the projection of mould caused when such inclination ditch bottom surface 22a can suppress by vulcanization forming and the rubber between the tire shoulder traverse furrow 9 flow, and the rubber thickness that can suppress the outside of tire shoulder traverse furrow 9 rises.
According to the performance above-mentioned action effect viewpoint, the tilt angle alpha 1 of inclination ditch bottom surface 22a be preferably 5 the degree more than, more preferably 10 the degree more than, and be preferably 60 the degree below, more preferably 50 the degree below.Wherein, above-mentioned tilt angle alpha 1 is the normal 19c angulation of the interior ora terminalis 22e of tire axial of inclination ditch bottom surface 22a and wide width part 22.
In addition, as shown in Figure 2, in above-mentioned central land portion 11,1 central longitudinal furrow 25 is set respectively in the both sides of tire equator C.This central authorities' longitudinal furrow 25 comprises: straight line longitudinal furrow 26 that circumferentially extends continuously with linearity along tire and the arc sections 27a that protrudes towards tire equator C are along the circumferential continuous wavy longitudinal furrow 27 of tire.Thus, land portion of central authorities 11 is divided into three land portions, that is: at the first pattern block row 28 that extend between straight line longitudinal furrow 26 and the tire shoulder longitudinal furrow 9, at the second pattern block row 30 of the center rib 29 of extension between straight line longitudinal furrow 26 and the wavy longitudinal furrow 27, extension between wavy longitudinal furrow 27 and tire shoulder longitudinal furrow 9.
The straight line longitudinal furrow 26 of present embodiment and wavy longitudinal furrow 27 are arranged on central land portion 11 are carried out the roughly position of 3 five equilibriums along tire axial.
The above-mentioned first pattern block row 28 are the first center running lug B2 circumferentially at interval to be provided with along tire form, and the described first center running lug B2 tilts for example to divide with the first central inclination ditch 31 of circular-arc extension with respect to tire axial by straight line longitudinal furrow 26, tire shoulder longitudinal furrow 9 and between them and forms.On the above-mentioned first center running lug B2, on the pattern block edge E2 of the acute side that forms intersecting, be provided with and overlook the chamfered section 32 that is roughly triangle when observing by the above-mentioned straight line longitudinal furrow 26 and the first central inclination ditch 31.Thus, improve the rigidity of the first center running lug B2, and improve anti-eccentric wear and decrease performance.
In addition, the first central inclination ditch 31 of present embodiment is to being provided with tilt across the identical direction of the adjacent above-mentioned tire shoulder traverse furrow of tire shoulder longitudinal furrow 9 10 (having a down dip to the right in the present embodiment).The first central inclination ditch 31 like this can export to tire shoulder longitudinal furrow 9 reliably with near the moisture film the tire equator C, thereby improves drainage.
Above-mentioned center rib 29 forms the smooth flank that substantial ditch or tire sipe are not set.Guarantee thus the to keep straight on rigidity of the tire equator C side that earth contact pressure is the highest when travelling improves the stability of keeping straight on.
The above-mentioned second pattern block row 30, for example be that the second center running lug B3 circumferentially is provided with at interval and forms along tire, the described second center running lug B3 forms by dividing with respect to the second central inclination ditch 33 of tire axial diagonally extending to tire shoulder longitudinal furrow 9 from the end of wavy longitudinal furrow 27, tire shoulder longitudinal furrow 9 and above-mentioned wavy longitudinal furrow 27 arc sections 27a separately.Wherein, on the above-mentioned second center running lug B3, the chamfered section 34 of overlooking general triangular shape when observing is set on the pattern block edge E3 of the acute side that forms intersecting by the above-mentioned tire shoulder longitudinal furrow 9 and the second central inclination ditch 33.Can improve the rigidity of the second center running lug B3 thus, improve anti-eccentric wear and decrease performance.
In addition, two auxiliary inclination ditches 35 are set on the second center running lug B3 of present embodiment, this auxiliary inclination ditch 35 extends to tire axial is inboard from above-mentioned tire shoulder longitudinal furrow 9, and is not communicated with above-mentioned wavy longitudinal furrow 27 but forms terminal.Above-mentioned auxiliary inclination ditch 35 to (in the present embodiment for the having a down dip to the right) setting of tilting across the identical direction of the adjacent above-mentioned tire shoulder traverse furrow of above-mentioned tire shoulder longitudinal furrow 9 10.In addition, present embodiment along tire circumferentially adjacent auxiliary inclination ditch 35 length have nothing in common with each other, but also can form 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 provided with smoothly with roughly 2 times the spacing across the circumferential spacing of tire of the adjacent tire shoulder traverse furrow 10 of above-mentioned tire shoulder longitudinal furrow 9.Can guarantee the rigidity of central land portion 11 thus, and effectively the ground-surface moisture film circumferentially be discharged in the outside to tire.
In addition, as shown in Figure 1, ditch width W2, W3 and trench depth D2, the D3 of above-mentioned straight line longitudinal furrow 26 and wavy longitudinal furrow 27, though particular determination not, yet viewpoint from the rigidity of guaranteeing 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 traverse furrow 10 of present embodiment is not provided with above-mentioned narrow width part 21, and at above-mentioned tire shoulder longitudinal furrow 9 places opening but form terminal not.Such air-inflation tyre can be kept the land portion higher rigidity of tire shoulder longitudinal furrow 9 both sides, but is difficult to suppress rubber but then and flows.
More than, though embodiments of the present invention are had been described in detail, the present invention is not limited to graphic embodiment, also can be deformed into variety of way and implement.
Embodiment:
Manufactured experimently the car air-inflation tyre of size 175/65R15 of the tread contour of internal structure with Fig. 1 and Fig. 2 based on the specification of table 1, and road-holding property etc. has been tested.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 traverse furrow
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 inboard 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)
With testing tire with interior pressure 230kPa after the wheel rim of 15 * 5JJ carries out the wheel rim assembling, be installed on two front-wheels of front wheel drive car of free air capacity 1300cc, only drive on the dried asphalt coating of Tire testing route of a circle 800m, to run at high speed, and adopt 10 point-scores that the road-holding property of each testing tire is estimated by the sense evaluation of chaufeur by chaufeur.The big more road-holding property of numerical value is superior more.
(anti-inclined to one side wearability)
Be installed on vehicle condition same as described above on two front-wheels of each testing tire, 3000km travels on dried asphalt road, and on tire circumference respectively three position findings: at the ratio R2 of the abrasion loss of the outer rim of the distolateral furrow bank of the inner of the tire axial of the ratio R1 of the abrasion loss of the outer rim of the furrow bank of the outer end of the tire axial of the inboard tyre surface reference plane of the circumferential same position of tire and tire equator side and outside tyre surface reference plane and ground connection, and calculated aviation value poor of the aviation value of ratio R1 of above-mentioned abrasion loss and R2.Its result is that 100 index is represented with the inverse of comparative example 1.The more little performance of the numerical value inclined to one side abrasion loss of big more expression is good more.In addition, the air-inflation tyre of comparative example 1 is located at above-mentioned outer end and the inner with upper/lower positions, promptly from the outer rim of the distolateral furrow bank of the outer rim of the furrow bank of tire equator side and ground connection to tire equator side and ground terminal side shifting the position of 60mm.
(drainage)
Testing tire is installed on two front-wheels of testing vehicle with above-mentioned condition, only be provided with on the wet asphalt coating of the depth of water 1～2mm and travel by the chaufeur above-mentioned Tire testing route of driving, by the sense evaluation of chaufeur, be that 100 index is represented with comparative example 1.The big more drainage of numerical value is good more.
(by noise testing)
Real vehicle coasting test with the JASO/C/606 defined is a foundation, speed slides the 50m that travels on the test route (asphalt coating) of linearity the distance of passing through with 60km/h, and by at the intermediate point of route from the line of centers that travels to side 7.5m, and, measured greatest level dB (A) by noise apart from the fixedly microphone that the position of road surface 1.2m is provided with.Its result is that 100 index represents that index is big more good more by the more little performance of noise with the inverse of comparative example 1.
The result of test is shown in table 1.
Table 1
The results verification of test the tire of embodiment compare with comparative example and obtained good result.The ground connection shape (being shown in Fig. 7) of embodiments of the invention 1, compare with airtyred ground connection shape (being shown in Fig. 9) in the past, from the circumferential two ends of tire shoulder longitudinal furrow to two outsides, there are not part (the tire circumferential lengths LB of ground plane and tire axial location independent with the horn shape protrusion, roughly certain), it is even therefore can to understand earth contact pressure.
Claims (7)
1. an air-inflation tyre has distolateral the most close ground connection at fetus face and is the tire shoulder longitudinal furrow of 5.0～20.0mm along circumferentially continuous extension of tire and ditch width, it is characterized in that,
Be installed on regular wheel rim and filled on the tire radial cross section of tire S. A. of 5% the zero load that is interim installing condition of pressing in regular comprising,
The profile of the tread of above-mentioned fetus face comprises:
The inside portion, its outer rim from the furrow bank of the tire equator side of above-mentioned tire shoulder longitudinal furrow is extended to the tire axial inboard; And
The outside portion, its outer rim from the distolateral furrow bank of the ground connection of above-mentioned tire shoulder longitudinal furrow is extended to the tire axial outside,
Above-mentioned inside portion comprises:
Inboard tyre surface reference plane, its circular arc by the radius of curvature (Ra) that is configured in the tire equator side and protrudes to the tire radial outside constitutes; And
Inboard chamfering shape arc surface, it is by the outer end of the tire axial that connects above-mentioned inboard tyre surface reference plane and the outer rim of the furrow bank of above-mentioned tire equator side, and radius of curvature (Rb) the circular arc formation littler than the above-mentioned radius of curvature (Ra) that protrudes to the tire radial outside,
Above-mentioned outside portion comprises:
Outside tyre surface reference plane, it constitutes by being configured in distolateral and circular arc radius of curvature (Rd) that protrude to the tire radial outside of ground connection; And
Outside chamfering shape arc surface, it is by the outer rim of the distolateral furrow bank of the inner of the tire axial that connects above-mentioned outside tyre surface reference plane and above-mentioned ground connection, and radius of curvature (Rc) the circular arc formation littler than the above-mentioned radius of curvature (Rd) that protrudes to the tire radial outside, and
The outside chamfering degree of depth (yo) is greater than the inboard chamfering degree of depth (yi), wherein the outside chamfering degree of depth (yo) is to the inboard outside imagination circular arc that prolongs of tire axial with above-mentioned outside tyre surface reference plane, and the normal direction distance between the outside chamfering shape arc surface of the outer fringe position of the furrow bank that above-mentioned ground connection is distolateral with respect to above-mentioned outside imagination circular arc, the inboard chamfering degree of depth (yi) is the inboard imaginary circular arc that above-mentioned inboard tyre surface reference plane is prolonged to the tire axial outside, normal direction distance with the above-mentioned inboard chamfering shape arc surface of the outer fringe position of the furrow bank of above-mentioned equator side with respect to the imaginary circular arc in above-mentioned inboard.
2. air-inflation tyre according to claim 1, wherein,
Have many tire shoulder traverse furrows at above-mentioned fetus face, they extend towards above-mentioned tire shoulder longitudinal furrow above this ground terminal from the position outside more axial than ground terminal roller tire, and circumferentially are provided with at interval along tire,
Above-mentioned many tire shoulder traverse furrows 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, greater than the summation at the A/F of 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 traverse furrow is 10%～85% of the summation of the ditch width of above-mentioned midway location.
4. according to claim 2 or 3 described air-inflation tyres, wherein,
Above-mentioned tire shoulder traverse furrow has the average ditch width little narrow width part of ditch width than this tire shoulder traverse furrow in above-mentioned tire shoulder longitudinal furrow side.
5. air-inflation tyre according to claim 4, wherein,
Above-mentioned tire shoulder traverse furrow comprises: above-mentioned narrow width part be connected with this narrow width part and to the wide width part of the ditch width broad of the distolateral extension of ground connection,
Above-mentioned wide width part has the inclination ditch bottom surface that increases gradually towards the ground terminal lateral sulcus degree of depth.
6. air-inflation tyre according to claim 1, wherein,
Have many tire shoulder traverse furrows on above-mentioned fetus face, they are from axially extending and circumferentially be provided with at interval along tire towards above-mentioned tire shoulder longitudinal furrow above this ground terminal in the position in the outside than ground terminal roller tire,
Above-mentioned tire shoulder traverse furrow is opening but form terminal not at above-mentioned tire shoulder longitudinal furrow place.
7. according to any described air-inflation tyre in the claim 1 to 6, wherein,
Above-mentioned tire shoulder longitudinal furrow, the angle of the furrow bank of its equator side is less than the angle of the distolateral furrow bank of ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2010-096246 | 2010-04-19 | ||
| JP2010096246A JP5123980B2 (en) | 2010-04-19 | 2010-04-19 | Pneumatic tire |
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| JP (1) | JP5123980B2 (en) |
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- 2011-04-19 CN CN201110100552.6A patent/CN102218976B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103974838A (en) * | 2011-12-08 | 2014-08-06 | 米其林企业总公司 | Tread with ariable champfers |
| CN103974838B (en) * | 2011-12-08 | 2016-08-24 | 米其林企业总公司 | There is the tyre surface of variable chamfering |
| CN104118278A (en) * | 2013-04-23 | 2014-10-29 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN104691246A (en) * | 2013-12-04 | 2015-06-10 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN104691246B (en) * | 2013-12-04 | 2017-06-16 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN106573500A (en) * | 2014-07-25 | 2017-04-19 | 横滨橡胶株式会社 | Pneumatic tire |
| US10647158B2 (en) | 2014-10-27 | 2020-05-12 | Bridgestone Corporation | Pneumatic tire |
| CN107074026B (en) * | 2014-10-27 | 2019-09-06 | 株式会社普利司通 | Pneumatic tire |
| CN107074026A (en) * | 2014-10-27 | 2017-08-18 | 株式会社普利司通 | Pneumatic tire |
| CN108146153A (en) * | 2016-12-02 | 2018-06-12 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN108146153B (en) * | 2016-12-02 | 2020-05-08 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN108621710A (en) * | 2017-03-15 | 2018-10-09 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN109747343A (en) * | 2019-03-06 | 2019-05-14 | 正新橡胶（中国）有限公司 | A kind of tire |
| CN113146891A (en) * | 2020-01-23 | 2021-07-23 | 住友橡胶工业株式会社 | Tire mold, tire manufacturing method, and tire |
| CN113146891B (en) * | 2020-01-23 | 2024-05-28 | 住友橡胶工业株式会社 | Tire mold, method for manufacturing tire, 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011225084A (en) | 2011-11-10 |
| CN102218976B (en) | 2015-05-20 |
| JP5123980B2 (en) | 2013-01-23 |
| KR20110116977A (en) | 2011-10-26 |
| KR101720801B1 (en) | 2017-03-28 |
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