WO2021085004A1 - Bandage pneumatique - Google Patents

Bandage pneumatique Download PDF

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Publication number
WO2021085004A1
WO2021085004A1 PCT/JP2020/036755 JP2020036755W WO2021085004A1 WO 2021085004 A1 WO2021085004 A1 WO 2021085004A1 JP 2020036755 W JP2020036755 W JP 2020036755W WO 2021085004 A1 WO2021085004 A1 WO 2021085004A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
stud pins
regions
region
concentrated
Prior art date
Application number
PCT/JP2020/036755
Other languages
English (en)
Japanese (ja)
Inventor
孝志 芝井
Original Assignee
横浜ゴム株式会社
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
Application filed by 横浜ゴム株式会社 filed Critical 横浜ゴム株式会社
Priority to FI20225419A priority Critical patent/FI130328B/fi
Priority to CN202080074781.2A priority patent/CN114599531B/zh
Publication of WO2021085004A1 publication Critical patent/WO2021085004A1/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
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
    • B60C11/1625—Arrangements thereof in the tread patterns, e.g. irregular
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • 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
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
    • 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
    • B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
    • B60C11/16—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile
    • B60C11/1643—Anti-skid inserts, e.g. vulcanised into the tread band of plug form, e.g. made from metal, textile with special shape of the plug-body portion, i.e. not cylindrical

Definitions

  • the present invention relates to a pneumatic tire in which a stud pin is planted on the tread of a tread portion.
  • studless tires are mainly used as winter tires.
  • a plurality of implantation holes for implanting the stud pins are provided in the tread portion, and the stud pins are implanted in these implantation holes (see, for example, Patent Document 1).
  • Such a stud pin is a factor for improving the running performance on an icy and snowy road surface, but may cause road surface damage when traveling on a road surface other than the icy and snowy road surface (general paved road surface). And even in the winter of the severe winter area, there is an opportunity to drive on paved roads other than ice and snow roads at a considerable frequency. Therefore, in stud tires, measures are required to suppress road surface damage while effectively exhibiting running performance (particularly, traction performance on ice) on ice and snow road surfaces.
  • An object of the present invention is to provide a pneumatic tire in which a stud pin is planted on the tread of a tread portion, which makes it possible to suppress road surface damage while improving on-ice performance.
  • the pneumatic tire of the present invention that achieves the above object has a tread portion extending in the tire circumferential direction to form an annular shape, a pair of sidewall portions arranged on both sides of the tread portion, and a tire of these sidewall portions.
  • the distance on the tire equatorial line is 0.8% of the tire circumference.
  • the strip-shaped region includes a concentrated region in which the number of stud pins included in the strip-shaped region is 4 or more, and a scattered region in which the number of stud pins included in the strip-shaped region is 3 or less. It is characterized in that a plurality of the concentrated regions are intermittently present along the tire circumferential direction in the plurality of strip-shaped regions.
  • the stud pin as described above, it is possible to suppress road surface damage while effectively improving the performance on ice. Specifically, since the number of stud pins is large in the concentrated area, the traction performance on ice can be improved, and in the scattered area, the number of stud pins is small, so that road surface damage can be suppressed. Since these concentrated regions and scattered regions coexist in the tire circumferential direction and the concentrated regions exist intermittently, road surface damage can be effectively suppressed without impairing the traction performance on ice.
  • the total number of stud pins is preferably 135 to 250.
  • the distance between the concentrated regions adjacent to each other in the tire peripheral direction is 1.0% to 30.0% of the tire peripheral length.
  • the dense area is particularly excellent in traction performance on ice among the concentrated areas, it is possible to further improve the traction performance on ice.
  • the number of dense regions is limited to 3 to 7, road surface damage can be sufficiently suppressed even if the dense regions are provided.
  • the distance between the dense regions adjacent to each other in the tire peripheral direction is 5.0% to 60.0% of the tire peripheral length.
  • the dense regions are present on the tire circumference at appropriate intervals, which is advantageous in suppressing road surface damage while effectively exhibiting traction performance on ice.
  • the average protrusion amount Px of the stud pins included in the concentrated region and the average protrusion amount Pav of the stud pins included in the scattered region satisfy the relationship of Px ⁇ 0.9 ⁇ Pav.
  • the "ground contact end” is the tire axial direction of the ground contact region formed when a tire is rim-assembled on a regular rim, placed vertically on a flat surface with a regular internal pressure applied, and a regular load is applied. Both ends of.
  • a “regular rim” is a rim defined for each tire in a standard system including a standard on which a tire is based. For example, a standard rim for JATTA, a "Design Rim” for TRA, or an ETRTO. If so, use “Measuring Rim”.
  • Regular internal pressure is the air pressure defined for each tire in the standard system including the standard on which the tire is based.
  • FIG. 1 is a meridian cross-sectional view of a pneumatic tire according to an embodiment of the present invention.
  • FIG. 2 is a front view showing a tread surface of a pneumatic tire according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view schematically showing an example of a stud pin planted in a tread portion.
  • FIG. 4 is an explanatory diagram schematically showing a change in the number of stud pins for each strip-shaped region.
  • the pneumatic tire of the present invention is arranged inside the tread portion 1, a pair of sidewall portions 2 arranged on both sides of the tread portion 1, and the sidewall portion 2 in the tire radial direction. It is provided with a pair of bead portions 3.
  • reference numeral CL indicates a tire equator
  • reference numeral E indicates a ground contact end.
  • FIG. 1 is a cross-sectional view of the meridian, the tread portion 1, the sidewall portion 2, and the bead portion 3 each extend in the tire circumferential direction to form an annular shape, whereby the pneumatic tire is formed.
  • the toroidal basic structure of is constructed.
  • the description using FIG. 1 is basically based on the illustrated meridian cross-sectional shape, but each tire component extends in the tire circumferential direction to form an annular shape.
  • a carcass layer 4 is mounted between the pair of left and right bead portions 3.
  • the carcass layer 4 includes a plurality of reinforcing cords extending in the tire radial direction, and is folded back from the inside to the outside of the vehicle around the bead cores 5 arranged in each bead portion 3.
  • a bead filler 6 is arranged on the outer periphery of the bead core 5, and the bead filler 6 is wrapped by a main body portion and a folded portion of the carcass layer 4.
  • a plurality of layers (two layers in FIG. 1) of belt layers 7 are embedded on the outer peripheral side of the carcass layer 4 in the tread portion 1.
  • Each belt layer 7 includes a plurality of reinforcing cords that are inclined with respect to the tire circumferential direction, and the reinforcing cords are arranged so as to intersect each other between the layers.
  • the inclination angle of the reinforcing cord with respect to the tire circumferential direction is set in the range of, for example, 10 ° to 40 °.
  • a belt reinforcing layer 8 is provided on the outer peripheral side of the belt layer 7.
  • the belt reinforcing layer 8 contains an organic fiber cord oriented in the tire circumferential direction.
  • the angle of the organic fiber cord with respect to the tire circumferential direction is set to, for example, 0 ° to 5 °.
  • the present invention is applied to a pneumatic tire having such a general cross-sectional structure, but the basic structure thereof is not limited to the above. Further, since the present invention relates to the arrangement of the stud pin P in the pneumatic tire in which the stud pin P is planted on the tread surface of the tread portion 1, the structure of the groove and the land portion formed on the surface of the tread portion 1 (Tread pattern) is not particularly limited.
  • the pneumatic tire shown in FIG. 2 has a plurality of lug grooves 11 extending along the tire width direction and a plurality of circumferential grooves 12 extending along the tire circumferential direction.
  • the portion 13 has a partitioned tread pattern.
  • the lug groove 11 extends inclined with respect to the tire width direction, one end is located on the tire equatorial CL, and the other end extends beyond the ground contact end E on one side in the tire width direction.
  • the existing first lug groove 11a extends at an angle with respect to the tire width direction, one end is located on the tire equatorial CL, and the other end extends beyond the contact end E on the other side in the tire width direction.
  • the second lug groove 11b is included.
  • first lug groove 11a and the second lug groove 11b one end of the first lug groove 11a and one end of the second lug groove 11b are alternately arranged in the tire circumferential direction on the tire equator CL, and the first lug groove 11a and the second lug groove 11b are arranged in the tire circumferential direction.
  • the 11a and the second lug groove 11b are arranged so as to form a substantially V shape.
  • the circumferential groove 12 extends so as to be inclined with respect to the tire circumferential direction so as to connect the adjacent lug grooves 11 in the tire circumferential direction in the middle portion of each lug groove 11 in the length direction.
  • the center land portion 13a is partitioned inside the tire width direction of the circumferential groove 12, and the shoulder land portion 13b (shoulder block) is partitioned outside the tire width direction of the circumferential groove 12. Further, in the illustrated example, one end communicates with the circumferential groove 12 in the middle portion in the length direction of each circumferential groove 12, extends from the circumferential groove 12 toward the tire equator CL side, and the other end ends.
  • An auxiliary groove 14 is provided that terminates within the center land portion 13a.
  • each land portion 13 is provided with a plurality of sipes 14.
  • the stud pin P can be planted on any land portion 13.
  • FIG. 3 is a cross-sectional view schematically showing a state in which the stud pin P is planted in the implantation hole of the tread portion 1.
  • the double flange type stud pin P is described as the stud pin P, but a stud pin P having a different structure such as a single flange type can also be used.
  • the stud pin P is composed of a columnar body portion P1, a tread side flange portion P2, a bottom side flange portion P3, and a tip portion P4.
  • the tread side flange portion P2 and the bottom side flange portion P3 have a larger diameter than the body portion P1, and the tread side flange portion P2 is formed on the tread surface side (outside in the tire radial direction) of the body portion P1 and the bottom side flange portion.
  • P3 is formed on the bottom side (inside in the tire radial direction) of the body portion P1.
  • the tip portion P4 protrudes outward in the tire radial direction from the tread side flange portion P2 on the pin shaft (center of the stud pin P).
  • the tip portion P4 protrudes from the tread surface in a state where the stud pin P is planted in the tread portion 1, it can bite into the ice and snow road surface and exhibits traction on ice.
  • the tip portion P4 is made of a material (for example, a tungsten compound) that is harder than other portions (body portion P1, tread side flange portion P2, bottom side flange portion P3) made of, for example, aluminum or the like.
  • the number of stud pins P included in the strip-shaped region described later is defined, but if at least a part of the tip portion P4 is present in the strip-shaped region described later, the number is counted as the number included in the strip-shaped region. To do.
  • the present invention is partitioned between a pair of tire meridians arranged so that the distance on the tire equator CL is 0.8% of the tire circumference, regardless of the tread pattern formed on the surface of the tread portion 1.
  • the area is defined as a band-shaped area A (see, for example, the shaded area in FIG. 2).
  • a plurality of strip-shaped regions A (A1, A2, A3 ...) are arranged over the entire circumference of the tire by shifting the angles by 1 degree along the tire circumferential direction.
  • the number of stud pins P included in each band-shaped region A (A1, A2, A3 ...) Is measured. Note that FIG.
  • FIG. 4 schematically shows the arrangement of the band-shaped region A, and the details of the tread pattern formed in the tread portion 1 and the specific arrangement of the stud pins P are omitted. Further, the strip-shaped region A after the reference numeral A3 is omitted.
  • the reference numeral R in the figure represents the tire circumferential direction.
  • the region in which the number of stud pins included in the strip-shaped region A is 4 or more is the concentrated region A', and the stud pins included in the strip-shaped region A.
  • these concentrated regions A'and the scattered regions a are provided in a mixed manner in the tire circumferential direction.
  • a plurality of concentrated regions A' are intermittently present along the tire circumferential direction in the plurality of strip-shaped regions A. Since the concentration region A'has a large number of stud pins P, the traction performance on ice can be improved.
  • the dense regions A" exist at 3 to 7 locations. Since the dense area A "is particularly excellent in traction performance on ice among the concentrated areas A', it is possible to further improve the traction performance on ice. On the other hand, the number of dense areas A" is reduced to 3 to 7 locations. Since it is suppressed, road surface damage can be sufficiently suppressed even if the dense area A "is provided. If the number of the dense areas A" is less than three, the effect of improving the traction performance on ice becomes insufficient. .. If the number of dense areas A "exceeds seven, road surface damage cannot be sufficiently suppressed.
  • the tread portion 1 when the tread portion 1 is provided with three rows of land portions including a center land portion 13a and a pair of shoulder land portions 13b, a concentrated region A ′ in which four or more stud pins are provided.
  • a dense area A "where 5 or more stud pins are provided it is preferable to provide at least one stud pin in each land portion.
  • the tread portion 1 is provided with, for example, 5 rows of land portions (center land portion and the center land portion). , A pair of shoulder land areas and a middle land area partitioned between the center land area and the shoulder land area), each land area in the dense area A ′′ where five or more stud pins are provided. Is preferably provided with at least one stud pin.
  • the stud pins P may be arranged as described above, but the total number of stud pins in the entire tire is preferably 135 to 250, more preferably 135 to 200.
  • the total number of stud pins in the entire tire is preferably 135 to 250, more preferably 135 to 200.
  • the distance L1 between the concentrated regions A'adjacent in the tire peripheral direction is 1.0% to 30.0% of the tire peripheral length.
  • the distance L1 between the concentrated regions A' is, as illustrated in FIG. 2, a length along the tire circumferential direction between the adjacent tire meridians between the adjacent concentrated regions A'. Since the dense region A ′′ also corresponds to the concentrated region A ′, the distance between the dense region A ′′ and the concentrated region A ′ is shown as the distance L1 between the concentrated regions A ′ in FIG.
  • the distance L2 between the dense regions A "adjacent to each other in the tire peripheral direction is 5.0% to 60.0% of the tire peripheral length. Therefore, the dense region A" is appropriate on the tire circumference. Since it exists at intervals, it is advantageous in suppressing road surface damage while effectively exerting traction performance on ice. If the distance L2 between adjacent dense areas A ′′ in the tire circumferential direction is less than 5.0% of the tire circumference, the dense areas A ′′ are arranged close to each other in the tire circumferential direction, so that road surface damage is sufficient. It cannot be suppressed.
  • the dense region A "distance L2 (not shown)" is the same as the above-mentioned concentration region A'distance L1 along the tire circumferential direction between the adjacent tire meridians between the adjacent dense regions A ". The length.
  • the protrusion amount h of the stud pin may be uniform, but the average value of the protrusion amount h of the stud pin included in the concentrated region A'is the average protrusion amount Px, and the protrusion amount h of the stud pin included in the scattered region a.
  • the average value of is taken as the average protrusion amount Pav
  • the tire size is 205 / 55R16 94T, it has the basic structure illustrated in FIG. 1, and based on the tread pattern of FIG. 2, the maximum number of stud pins included in the dense area, the number of concentrated areas, and the dense area.
  • the ratio Px / Pav of the average protrusion amount Px of the stud pins included in the concentrated region to the average protrusion amount Pav of the included stud pins is set as shown in Table 1, respectively. Eight 11 types of pneumatic tires were produced.
  • the length of the band-shaped region in the tire circumference direction (0.8% of the tire circumference) is 15.8 mm.

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

Abstract

L'invention concerne un bandage pneumatique dans lequel des tiges de goujon sont implantées dans une surface de bande de roulement d'une partie bande de roulement, le bandage pneumatique étant apte à supprimer un endommagement de surface de route tout en améliorant les performances sur la glace. Dans un bandage pneumatique dans lequel des tiges de goujon P sont implantées dans une surface de bande de roulement d'une partie bande de roulement 1, lorsque des régions en forme de bande A, chacune étant définie entre une paire de méridiens de bandage disposés de telle sorte qu'un intervalle entre eux le long d'un équateur de bandage CL soit de 0,8 % de la circonférence du bandage, sont disposées sur la circonférence totale du bandage le long d'une direction circonférentielle du bandage et à des angles décalés d'un degré à la fois, une pluralité des régions en forme de bande A comprenant une région concentrée A' ayant quatre tiges de goujon ou plus et une région en pointillé a ayant trois tiges de goujon ou moins et dans la pluralité de régions en forme de bande A, une pluralité des régions concentrées A' sont présentes de façon intermittente le long de la direction circonférentielle du bandage.
PCT/JP2020/036755 2019-11-01 2020-09-29 Bandage pneumatique WO2021085004A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20225419A FI130328B (fi) 2019-11-01 2020-09-29 Paineilmatäytteinen rengas
CN202080074781.2A CN114599531B (zh) 2019-11-01 2020-09-29 充气轮胎

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-199644 2019-11-01
JP2019199644A JP7172953B2 (ja) 2019-11-01 2019-11-01 空気入りタイヤ

Publications (1)

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WO2021085004A1 true WO2021085004A1 (fr) 2021-05-06

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PCT/JP2020/036755 WO2021085004A1 (fr) 2019-11-01 2020-09-29 Bandage pneumatique

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JP (1) JP7172953B2 (fr)
CN (1) CN114599531B (fr)
FI (1) FI130328B (fr)
WO (1) WO2021085004A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115465021A (zh) * 2022-09-26 2022-12-13 中策橡胶集团股份有限公司 一种提高抓地力的镶钉雪地胎

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024027313A (ja) 2022-08-17 2024-03-01 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ
JP2024027318A (ja) 2022-08-17 2024-03-01 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49132706A (fr) * 1973-04-21 1974-12-19
JPS5522580A (en) * 1978-08-07 1980-02-18 Moritsugu Koshiba Snow kick tire
JPS61177903U (fr) * 1985-04-25 1986-11-06
KR100656790B1 (ko) * 2005-06-08 2006-12-13 송기봉 단일 조작으로 필요에 따라 일반 타이어 및 스파이크타이어로 전환가능한 타이어
CN206884611U (zh) * 2017-07-03 2018-01-16 山东丰源轮胎制造股份有限公司 一种镶钉雪地轮胎
WO2019138792A1 (fr) * 2018-01-11 2019-07-18 横浜ゴム株式会社 Pneu pouvant recevoir des crampons et pneumatique

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Publication number Priority date Publication date Assignee Title
ATE523547T1 (de) 2008-12-01 2011-09-15 Dsm Ip Assets Bv Neues verfahren
JP4677027B2 (ja) * 2008-12-24 2011-04-27 住友ゴム工業株式会社 空気入りタイヤ及びスパイクタイヤ
JP4656239B2 (ja) * 2009-01-23 2011-03-23 横浜ゴム株式会社 空気入りタイヤ
JP2014151811A (ja) * 2013-02-12 2014-08-25 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2016215727A (ja) * 2015-05-15 2016-12-22 横浜ゴム株式会社 空気入りタイヤ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49132706A (fr) * 1973-04-21 1974-12-19
JPS5522580A (en) * 1978-08-07 1980-02-18 Moritsugu Koshiba Snow kick tire
JPS61177903U (fr) * 1985-04-25 1986-11-06
KR100656790B1 (ko) * 2005-06-08 2006-12-13 송기봉 단일 조작으로 필요에 따라 일반 타이어 및 스파이크타이어로 전환가능한 타이어
CN206884611U (zh) * 2017-07-03 2018-01-16 山东丰源轮胎制造股份有限公司 一种镶钉雪地轮胎
WO2019138792A1 (fr) * 2018-01-11 2019-07-18 横浜ゴム株式会社 Pneu pouvant recevoir des crampons et pneumatique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115465021A (zh) * 2022-09-26 2022-12-13 中策橡胶集团股份有限公司 一种提高抓地力的镶钉雪地胎
CN115465021B (zh) * 2022-09-26 2023-07-04 中策橡胶集团股份有限公司 一种提高抓地力的镶钉雪地胎

Also Published As

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CN114599531A (zh) 2022-06-07
FI130328B (fi) 2023-06-21
JP7172953B2 (ja) 2022-11-16
CN114599531B (zh) 2023-11-14
FI20225419A1 (en) 2022-05-13
JP2021070449A (ja) 2021-05-06

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