WO2015012402A1 - Pneu radial - Google Patents

Pneu radial Download PDF

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Publication number
WO2015012402A1
WO2015012402A1 PCT/JP2014/069751 JP2014069751W WO2015012402A1 WO 2015012402 A1 WO2015012402 A1 WO 2015012402A1 JP 2014069751 W JP2014069751 W JP 2014069751W WO 2015012402 A1 WO2015012402 A1 WO 2015012402A1
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WO
WIPO (PCT)
Prior art keywords
tire
center
sipe
land portion
main groove
Prior art date
Application number
PCT/JP2014/069751
Other languages
English (en)
Japanese (ja)
Inventor
薫子 渡邉
Original Assignee
株式会社ブリヂストン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2013155977A external-priority patent/JP5890353B2/ja
Priority claimed from JP2013155978A external-priority patent/JP5890354B2/ja
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Publication of WO2015012402A1 publication Critical patent/WO2015012402A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272—Width of the sipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0344—Circumferential grooves provided at the equatorial plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0346—Circumferential grooves with zigzag shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0353—Circumferential grooves characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0381—Blind or isolated grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272—Width of the sipe
    • B60C2011/1286—Width of the sipe being different from sipe to sipe
    • 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
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles

Definitions

  • the present invention relates to a pneumatic radial tire (hereinafter, also simply referred to as “tire”), and more particularly, to a pneumatic radial tire having improved stone biting resistance of a sipe provided in a tread portion.
  • a tread pattern is formed on a tread portion of a pneumatic radial tire for the purpose of improving so-called wet performance such as drainage and steering stability when the vehicle travels on a wet road surface.
  • wet performance there are a plurality of main grooves extending in the tire circumferential direction in the tread portion of the tire, and a plurality of lug grooves and sipes extending in the tire width direction in the land portion defined by the main grooves. It is generally performed.
  • the main groove means a wide groove in the tread portion, and has a tread wear indicator that is a protrusion that can visually distinguish the degree of wear of the tread.
  • an object of the present invention is to provide a pneumatic radial tire with improved stone biting resistance of a sipe provided in a tread portion, and preferably maintains stone performance in a main groove while maintaining wet performance. Improves biting ability.
  • the present inventor assumes that the relationship between the circumferential sipe provided in the contact area of the tread portion and the inclined sipe that is inclined with respect to the tire circumferential direction is predetermined.
  • the present inventors have found that the above-described problems can be solved by satisfying a predetermined relationship between the main groove extending in the tire circumferential direction and the lug groove extending incline in the tire circumferential direction, thereby completing the present invention. It was.
  • the pneumatic radial tire of the present invention is a pneumatic radial tire having a land portion defined by at least three main grooves continuously extending in the tire circumferential direction in a contact area of a tread portion formed in an annular shape.
  • a main groove on both outer sides in the tire width direction is a shoulder main groove
  • a main groove on the inner side in the tire width direction from the shoulder main groove is a center main groove
  • Shoulder land portion when the land portion formed on the inner side in the tire width direction than the shoulder land portion is a center land portion, a circumferential sipe extending in the tire circumferential direction on the shoulder land portion and the center land portion, and a tire
  • An inclined sipe extending obliquely with respect to the circumferential direction, and a width Wa of the circumferential sipe and a width Wb of the inclined sipe are expressed by the following formula (1), Wa ⁇ Wb (1)
  • the ground contact area means that the tire is mounted on a standard rim specified in JATMA YEAR BOOK (2008 edition, Japan Automobile Tire Association Standard), and the maximum load capacity (internal pressure) in the applicable size / ply rating in JATMA YEAR BOOK.
  • -Contact surface of the tire when the internal pressure of 100% of the air pressure (maximum air pressure) corresponding to the load capacity correspondence table (bold load) is filled and 80% of the maximum load capacity is loaded.
  • a plurality of lug grooves extending from the center main groove in an inclined direction with respect to the tire circumferential direction are provided, and the lug groove is substantially centered in the tire width direction of the center land portion.
  • the circumferential sipe and the inclined sipe provided in a portion, and the depth of the lug groove in the communicating portion between the lug groove and the circumferential sipe, and the communicating portion between the inclined sipe It is preferable that the depth of the circumferential sipe and the inclined sipe is shallower.
  • the depth of the circumferential sipe provided in the said center land part is deepest in the approximate center between the said lug grooves.
  • the depth at the deepest portion of the circumferential sipe provided in the center land portion is the same as the depth at the deepest portion of the circumferential sipe provided in the shoulder land portion.
  • a circumferential sipe provided on the shoulder land portion extends continuously in the tire circumferential direction.
  • the width Wc of the center main groove and the width Ws of the shoulder main groove are expressed by the following formula (2), Wc ⁇ Ws (2) Satisfying the relationship represented by
  • the center land portion has a plurality of lug grooves extending obliquely with respect to the tire circumferential direction from the center main groove, and an angle formed with the tire circumferential direction as the lug groove is separated from the center main groove. It is preferable that the lug groove becomes smaller and the depth of the lug groove becomes shallower as it goes away from the center main groove.
  • the lug groove communicates with the circumferential sipe and the inclined sipe provided in the center land portion at approximately the center in the tire width direction of the center land portion. Furthermore, in the tire according to the present invention, it is preferable that the lug groove terminates at the center of the center land portion in the tire width direction. Moreover, in the tire of this invention, it is preferable that the said main groove has a linear part which has a width
  • the present invention it is possible to provide a pneumatic radial tire with improved stone biting resistance of a sipe provided in a tread portion.
  • the stone biting resistance of the main groove can be improved while maintaining the wet performance.
  • FIG. 1 is a tire width direction sectional view of a pneumatic radial tire according to a preferred embodiment of the present invention.
  • FIG. 1 is a developed plan view of a tread portion of a pneumatic radial tire according to a preferred embodiment of the present invention.
  • the illustrated tire has at least three (three in the illustrated example) main grooves 1 continuously extending in the tire circumferential direction in the contact area W of the annularly formed tread portion 10 and the tire circumferential direction. And a lug groove 2 extending in an inclined manner.
  • the main groove 1 has a zigzag shape extending in the circumferential direction.
  • it may have a wave shape or a linear shape.
  • the main grooves 1 on both outer sides in the tire width direction are the shoulder main grooves 1a and the tire main grooves 1a in the tire width direction.
  • the main groove 1 on the inner side is the center main groove 1b, and the land portion 3 formed on the outer side in the tire width direction from the shoulder main groove 1a is formed on the shoulder land portion 3a and on the inner side in the tire width direction from the shoulder land portion 3a.
  • the shoulder land portion 3a and the center land portion 3b are inclined with respect to the circumferential direction sipe 4 (4a, 4b in the illustrated example) extending in the tire circumferential direction and the tire circumferential direction.
  • an inclined sipe 5 (in the illustrated example, 5a, 5b, 5c).
  • the width Wa of the circumferential sipes 4a and 4b and the width Wb of the inclined sipes 5a, 5b and 5c are expressed by the following formula (1), Wa ⁇ Wb (1)
  • the circumferential sipe 4 is shallower than the inclined sipe 5.
  • the sipe opens and closes with the deformation of the stepping and kicking-out during the rolling of the tire in the inclined sipe 5 that inclines in the tire circumferential direction. Even if a stone is caught, it is easy to be discharged and it does not become a big problem. However, since the sipe 4 that extends in the circumferential direction does not open and close when the tire rolls, the stones sandwiched between the circumferential sipe 4 are not easily discharged.
  • the circumferential sipe 4 is designed to be thinner and shallower than the inclined sipe 5 so that stones are not easily caught in the circumferential sipe 4 and the rigidity of the land portion 3 is increased. Reduced to prevent wear.
  • Wa is 0.5 to 0.75 times Wb, and the depth of the circumferential sipe 4 is 0.7 to 0.9 times the depth of the inclined sipe 5.
  • the lug groove 2 is provided in the land portion 3 as illustrated.
  • a plurality of lug grooves 2a extending from the center main groove 1b in an inclined manner with respect to the tire circumferential direction are provided at equal intervals.
  • the lug grooves 2a are formed on the center land portion 3b. It is preferable to terminate at approximately the center in the tire width direction.
  • the lug grooves 2a are provided at substantially equal intervals.
  • the lug grooves 2a are not limited to this, and the intervals between the lug grooves 2a may be arbitrary.
  • a circumferential shear force acts on the center land portion 3b of the tread portion 10 in the traveling direction (driving direction), and the center land portion 3b is worn (center wear).
  • the center land portion 3b is worn (center wear).
  • the contact pressure tends to be released in the vicinity of the shoulder main groove 1a of the tread portion 10, so that a force in the braking direction works and the opening end of the shoulder main groove 1a wears preferentially. Riverware is likely to occur. Therefore, by terminating the lug groove 2a at the approximate center in the tire width direction of the center land portion 3b, the center wear and the river wear are suppressed at the same time without lowering the rigidity of the center land portion 3b more than necessary. This improves the wear appearance.
  • the width of the lug groove 2a may be appropriately designed according to the use of the tire, and may be, for example, 3 mm to 6 mm.
  • the approximate center in the tire width direction of the center land portion 3b refers to a region of 20% of the entire width in the width direction of the center land portion 3b with the center in the tire width direction of the center land portion 3b as the center.
  • the lug groove 2a communicates with the circumferential sipe 4a and the inclined sipe 5a at the approximate center of the center land portion 3b, and in the communicating portion 6a between the lag groove 2a and the circumferential sipe 4a.
  • the depth of the lug groove 2a and the depth of the lug groove 2a in the communication part 6b between the lug groove 2a and the inclined sipe 5a are shallower than the depths of the circumferential sipe 4a and the inclined sipe 5a in the communication parts 6a and 6b. preferable.
  • the depth of the circumferential sipe 4a provided in the center land portion 3b is preferably deepest at the approximate center between the lug grooves 2a.
  • the edge effect can be obtained while maintaining the rigidity of the center land portion 3b, and the wear resistance and the wet road surface can be improved.
  • the approximate center between the lug grooves 2a refers to a region in the circumferential direction 20% of the distance L between the lug grooves 2a, with the center of the distance L between the lug grooves 2a as the center.
  • the depth at the deepest portion of the circumferential sipe 4a provided in the center land portion 3b and the depth at the deepest portion of the circumferential sipe 4b provided in the shoulder land portion 3a are: Preferably they are the same. Thereby, traction balance can be maintained until the end of wear.
  • the circumferential sipe 4b provided in the shoulder land portion 3a is a circumferential sipe that continuously extends in the tire circumferential direction.
  • the shoulder land portion 3a of the tread portion 10 is likely to be worn. Therefore, in the tire of the present invention, the circumferential sipe provided on the shoulder land portion 3a is a circumferential sipe 4b that extends continuously in the circumferential direction, so that the wear that progresses from the shoulder progresses to the center region. It is preventing.
  • the width Wc of the center main groove 1b and the width Ws of the shoulder main groove 1a are expressed by the following formula (2), Wc ⁇ Ws (2) It is preferable to satisfy the relationship represented by these.
  • the lug groove 2 extending inclined with respect to the tire circumferential direction opens and closes with the deformation of the stepping and kicking out when the tire rolls. Even if it gets caught, it is easy to be discharged and it does not become a big problem.
  • the main grooves 1a and 1b extending in the circumferential direction do not open and close when the tire rolls, stones caught in the grooves are not easily discharged.
  • the center main groove 1b is less deformed in the tread portion during rolling of the tire than the shoulder main groove 1a, and it is difficult to discharge the bited stone.
  • the center main groove 1b is designed to be thinner than the shoulder main groove 1a, so that stones are not easily caught.
  • Wc is 0.75 to 0.9 times Ws.
  • the depth of the main grooves 1a and 1b may be appropriately designed according to the use of the tire, and may be, for example, 7.5 to 11 mm.
  • the tire of the present invention preferably has a structure in which the lug groove 2a formed in the center land portion 3b is inclined so that an angle formed with the tire circumferential direction decreases as the distance from the communicating center main groove 1b increases. .
  • the lug groove 2a since the vicinity of the center main groove 1b of the lug groove 2a faces in the direction close to the tire width direction, the stones sandwiched in the vicinity of the center main groove 1b of the lug groove 2a are relatively easily discharged by rolling of the tire.
  • the lug groove 2a faces a direction close to the tire circumferential direction, so that the pinched stone is difficult to be discharged.
  • the depth of the lug groove 2a formed in the center land portion 3b is designed so as to become shallower as it goes away from the center main groove 1b, and the structure can be easily discharged even if a stone is caught in the tip of the lug 2a groove. It is said.
  • the depth of the lug groove 2a is 6 to 11 mm at the point where it intersects with the center main groove 1b, and may be about 1.5 to 3 mm at the tip of the lug groove 2a.
  • the width of the see-through portion S may be 0.3 to 0.6 times the width Wc of the center main groove 1b. It is generally known that when the main groove is provided at the center in the width direction of the tire, the steering stability is lowered. However, in the tire of the present invention, the width Wc of the center main groove 1b is the same as that of the shoulder main groove 1a. Since it is as narrow as 0.75 to 0.9 times the width Ws, the steering stability is not deteriorated.
  • the tire according to the present invention relates to the improvement of the tread portion, and other than that, if the circumferential sipe 4a and the inclined sipe 5a provided in the center land portion 3b of the tread portion 10 satisfy the above relationship.
  • an inclined sipe 5c that is inclined from the center main groove 1b and is not communicated with the lug groove 2a is provided, and the center main groove 1b and the lug groove 2a intersect. You may make it easier to discharge the stones between the points.
  • the effect which raises an edge effect is acquired by providing the inclination sipes 5b and 5c.
  • the shoulder main groove 1a may be provided with a lug groove 2b having an inclination with respect to the tire circumferential direction.
  • This lug groove 2b can also enhance the edge effect in the circumferential direction.
  • the inclined sipe 5b provided in the shoulder land portion 3a may be a sipe extending substantially outward in the tire width direction from the tip of the lug groove 2b.
  • the shoulder land portion 3a may be appropriately provided with a groove 7 and an inclined sipe 5d according to the purpose.
  • the negative rate which is the ratio of the total groove area to the entire surface of the tread portion 10
  • the total area of the main groove 1 occupying the negative rate may be about 60 to 70%.
  • the structure other than the tread portion 10 is not particularly limited, and a known member or a known material can be used.
  • FIG. 3 is a cross-sectional view in the tire width direction of a pneumatic radial tire according to one preferred embodiment of the present invention.
  • the illustrated tire 20 has a pair of left and right bead portions 12 and a pair of sidewall portions 13 in which the bead cores 11 are embedded, and a tread portion 10 connected to both sidewall portions 13, and spans between the pair of left and right bead cores 11.
  • the carcass ply 14 extends in a toroidal shape and reinforces each part.
  • three belt layers 15 a, 15 b, 15 c composed of rubberized layers of reinforcing cords arranged to be inclined with respect to the tire circumferential direction. Is arranged.
  • the number of carcass plies 14 is one, but in the tire 20 of the present invention, the number of carcass plies 14 is not limited to this and may be two or more. Further, the structure is not particularly limited.
  • the locking structure of the carcass ply 14 in the bead portion 12 is not limited to the structure in which the carcass ply 14 is wound around and locked around the bead core 11 as shown in the drawing, and may be a structure in which the end portion of the carcass ply is sandwiched between two layers of bead cores ( Not shown).
  • the belt layers 15a, 15b and 15c are made of a rubberized layer of cord, preferably a steel corded rubberized layer extending with an inclination of ⁇ 15 to ⁇ 40 ° with respect to the tire circumferential direction, for example.
  • the belt layers 15a, 15b, and 15c of the three layers are laminated so that the cords constituting each belt layer intersect with each other across the tire equatorial plane, thereby forming a crossing layer. It is not restricted to the example to do.
  • an inner liner is usually disposed in the innermost layer of the tire 20.
  • an inert gas such as nitrogen can be used as the gas filled in the tire 20 as the gas filled in the tire 20.
  • Examples 1-1 and 1-2 and Conventional Example 1> A tread pattern tire having three zigzag main grooves as shown in FIG. 1 was produced with a tire size of 195 / 70R15.
  • the width of the center main groove was 7 mm, and the width of the shoulder main groove was 7 mm.
  • the center main groove 1b was disposed on the tire equator, and the shoulder main groove 1a was disposed at a position of 47% of the full width in the tire width direction centered on the center of the tread portion 10.
  • the depth (mm) of the lug groove 2a is as shown in Table 1.
  • the depth of the main groove was 9.5 mm
  • the depth of the lug groove was 7 mm
  • the end position of the lug groove was the center of the center land portion in the tire width direction.
  • the deepest part of the circumferential sipe 4a was provided in the approximate center between lug grooves.
  • Each tire obtained was incorporated into a rim (rim width: 6J), filled with an internal pressure of 450 kPa, mounted on a vehicle, and applied with a load of 6.0 kPa, with respect to stone biting resistance, wetness and wear resistance. Evaluation was performed according to the following procedure.
  • the depth of the lug groove 2a gradually decreases so that the depth at the communication portion 6a between the main groove 1b and the lug groove 2a is 7 mm, and the depth is 2 mm at the approximate center of the center land portion 3b.
  • Table 1 shows that the pneumatic radial tire of the present invention has improved stone biting resistance of the sipe provided in the tread portion.
  • Example 2 A tread pattern tire having three zigzag main grooves as shown in FIG. 1 was produced with a tire size of 195 / 70R15.
  • the center main groove 1b is disposed on the tire equator, and the shoulder main groove 1a is disposed at a position of 47% in width with the center in the width direction of the tread portion 10 as the center.
  • Table 2 shows the width of the center main groove Wc, the width of the shoulder main groove Ws, the end position of the lug groove, the circumferential sipe, the inclined sipe, and the width of the see-through portion.
  • the depth of the main groove was 9.5 mm.
  • Each tire obtained was assembled into a rim (rim width: 6J), filled with an internal pressure of 450 kPa, mounted on the vehicle, and applied with a load of 6.00 kPa. Evaluation was performed according to the following procedure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

　La présente invention porte sur un pneu radial, dans lequel pneu des lamelles disposées sur une partie de bande de roulement ont une résistance à la détérioration par les pierres améliorée. Une zone de contact avec le sol (W) d'une partie de bande de roulement (10) réalisée sous une forme annulaire comprend une partie de portée (3) divisée par au moins trois rainures principales (1) s'étendant de façon continue dans une direction de la périphérie du pneu. Quand les rainures principales sur les côtés externes dans une direction de la largeur du pneu sont désignées sous le nom de "rainures principales d'épaulement (1a)", la rainure principale vers l'intérieur dans la direction de la largeur du pneu à partir des rainures principales d'épaulement (1a) est désignée sous le nom de "rainure principale centrale (1b)", les parties de portée formées vers l'extérieur dans la direction de la largeur du pneu à partir des rainures principales d'épaulement (1a) sont désignées sous le nom de "parties de portée d'épaulement (3a)", et les parties de portée formées vers l'intérieur dans la direction de la largeur du pneu à partir des parties de portée d'épaulement (3a) sont désignées sous le nom de "parties de portée centrale (3b)", les parties de portée d'épaulement (3a) et les parties de portée centrales (3b) comportant des lamelles périphériques (4) s'étendant dans la direction de la circonférence du pneu et des lamelles inclinées (5) s'étendant selon une certaine inclinaison par rapport à la direction de la périphérie du pneu, la largeur (Wa) des lamelles circonférentielles (4) et la largeur (Wb) des lamelles inclinées (5) satisfaisant à la relation Wa < Wb, et les lamelles circonférentielles (4) étant moins profondes que les lamelles inclinées (5).
PCT/JP2014/069751 2013-07-26 2014-07-25 Pneu radial WO2015012402A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2013155977A JP5890353B2 (ja) 2013-07-26 2013-07-26 空気入りラジアルタイヤ
JP2013155978A JP5890354B2 (ja) 2013-07-26 2013-07-26 空気入りラジアルタイヤ
JP2013-155978 2013-07-26
JP2013-155977 2013-07-26

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WO2015012402A1 true WO2015012402A1 (fr) 2015-01-29

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WO (1) WO2015012402A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114734757A (zh) * 2017-08-30 2022-07-12 住友橡胶工业株式会社 充气子午线轮胎

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI127150B (en) * 2017-01-18 2017-12-15 Nokian Renkaat Oyj Pattern block arrangement for pneumatic tire or tread band
JP2019111845A (ja) 2017-12-20 2019-07-11 株式会社ブリヂストン 空気入りタイヤ
JP7102893B2 (ja) * 2018-04-17 2022-07-20 住友ゴム工業株式会社 タイヤ
CN111323245A (zh) * 2020-03-13 2020-06-23 安徽德技汽车检测中心有限公司 一种检测轮胎行驶中夹带石子的试验方法

Citations (9)

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Publication number Priority date Publication date Assignee Title
JPH0253617A (ja) * 1988-08-15 1990-02-22 Toyo Tire & Rubber Co Ltd 石咬みを防止した空気入りタイヤ
JPH07290909A (ja) * 1994-04-26 1995-11-07 Bridgestone Corp 方向性傾斜溝を有する空気入りタイヤ
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CN114734757B (zh) * 2017-08-30 2024-02-06 住友橡胶工业株式会社 充气子午线轮胎

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