WO2013157544A1 - タイヤ - Google Patents
タイヤ Download PDFInfo
- Publication number
- WO2013157544A1 WO2013157544A1 PCT/JP2013/061285 JP2013061285W WO2013157544A1 WO 2013157544 A1 WO2013157544 A1 WO 2013157544A1 JP 2013061285 W JP2013061285 W JP 2013061285W WO 2013157544 A1 WO2013157544 A1 WO 2013157544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- width direction
- groove
- tread
- circumferential
- Prior art date
Links
Images
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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- 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
- B60C11/1259—Depth 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
- B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
-
- 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
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
-
- 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
- B60C11/0311—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation
- B60C2011/0313—Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation directional type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0348—Narrow grooves, i.e. having a width of less than 4 mm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/036—Narrow grooves, i.e. having a width of less than 3 mm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
- B60C2011/0369—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth with varying depth of the groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
-
- 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
-
- 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
- B60C2200/065—Tyres specially adapted for particular applications for heavy duty vehicles for construction vehicles
Definitions
- the present invention relates to a tire.
- a heavy load tire 1 having a small crossing belt layer 13 composed of the small crossing belts 13A / 13B see, for example, Patent Documents 1 and 2).
- the main crossing belt layer 12 is disposed on the outer side in the tire radial direction of the small crossing belt layer 13, and the protective belt layer 11 is arranged in the tire radial direction of the main crossing belt layer 12. Arranged outside.
- the angle formed by the cord constituting the small crossing belt layer 13 and the tire circumferential direction L is 4 to 10 °, and the cord constituting the main crossing belt layer 12 and the tire circumferential direction L are The angle formed is 18 to 35 °, and the angle formed by the cord constituting the protective cross belt layer 11 and the tire circumferential direction L is 22 to 33 °.
- the region near the end in the tire width direction W in the tire circumferential direction L contracts greatly in the tire circumferential direction L, so that the region near the tire equator line CL in the tire circumferential direction L
- the length is longer than the length of the region near the end in the tire width direction W in the tire circumferential direction L.
- a force in the tire rotation direction (driving force) is generated in a region near the tire equator line CL, and a region in the direction opposite to the tire rotation direction is generated in a region near the end in the tire width direction W. Since a force (braking force) is generated, a shearing force is generated near the boundary between both regions.
- the tire diameter is between a region in the vicinity of the tire equator line CL and a region in the vicinity of the end in the tire width direction W. Since the degree of deformation in the direction is different, a shearing force is generated near the boundary between the two.
- such a phenomenon becomes prominent in the heavy load tire 1 configured such that the length of the land portion in the tire width direction W is 30% or more of the length of the tread portion 10 in the tire width direction W.
- the tire according to the first feature includes a plurality of land portions formed in the tread portion.
- the plurality of land portions are partitioned by a circumferential groove extending in the tire circumferential direction and a width groove extending in the tire width direction, or the end of the tread portion in the tire width direction and the width direction It is partitioned by a groove.
- the length of the width direction groove in the tire width direction is 30% or more of the length of the tread portion in the tire width direction.
- channel has a bending part comprised so that it might bend in the direction opposite to at least 1 tire rotation direction in the at least one side of a tire equator line.
- the circumferential groove has a central circumferential groove extending along the tire circumferential direction on the tire equator line.
- the widthwise groove having the bent portion extends from an end portion of the tread portion in the tire width direction to the central circumferential groove.
- the plurality of land portions include a center land portion formed in a tread center region including the tire equator line as a center in the tire width direction.
- the tread center region has a width of 40% or less of the length of the tread portion in the tire width direction.
- the ratio P / H between the length P of the central land portion in the tire circumferential direction and the height H of the central land portion in the tire radial direction is 2 or more and 3.5 or less.
- channel is formed in the at least one part of the 1st groove
- the depth h1 of the second groove in the tire radial direction is 80% or less of the depth h2 of the first groove in the tire radial direction.
- the tire includes a plurality of belt layers. At least one of the bent portions is provided in the vicinity of the position in the tire width direction corresponding to the end portion of the belt layer having the smallest angle between the cord constituting the belt layer and the tire circumferential direction.
- the width direction groove has at least two bent portions on at least one side of the tire equator line.
- the width direction groove is formed between the two bent portions so as to be substantially parallel to the tire width direction.
- FIG. 1 is a cross-sectional view orthogonal to the tire circumferential direction along the tire radial direction of the tire according to the first embodiment.
- FIG. 2 is a diagram for explaining a belt configuration of the tire according to the first embodiment.
- FIG. 3 is a plan view of a part of the tread surface in the tire according to the first embodiment.
- FIG. 4 is a diagram for explaining effects that can be achieved by the tire according to the first embodiment.
- FIG. 5 is a plan view of a part of the tread surface in the tire according to the first modification.
- FIG. 6 is a plan view of a part of the tread surface in the tire according to the second modification.
- FIG. 7 is a plan view of a part of a tread surface in a tire according to Modification 3.
- FIG. 1 is a cross-sectional view orthogonal to the tire circumferential direction along the tire radial direction of the tire according to the first embodiment.
- FIG. 2 is a diagram for explaining a belt configuration of the tire according to
- FIG. 8 is a plan view of a part of a tread surface in a tire according to a fourth modification.
- FIG. 9 is a plan view of a part of the tread surface in the tire according to the fifth modification.
- FIG. 10 is a plan view of a part of a tread surface in a tire according to Modification 6.
- FIG. 11A is a cross-sectional view showing the height of a land portion defined by the width direction groove 20 (second groove 20B), and FIG. 11B is a cross-section showing the depth of the second groove 20B.
- FIG. 11C is a cross-sectional view showing the depth of the first groove 20A.
- FIG. 12 is a diagram illustrating the relationship between the ratio P / H relating to the size of the central land portion 40C, the shear rigidity of the central land portion 40C, and the ease of rubber flow of the central land portion 40C.
- FIG. 13 is a diagram showing the relationship between the ratio P / H and the wear energy.
- FIG. 1 shows a cross-sectional view perpendicular to the tire circumferential direction along the tire radial direction of the tire 1 according to the first embodiment
- FIG. 3 shows a part of the tread surface in the tire 1 according to the first embodiment. A plan view is shown.
- a heavy load tire 1 will be described as an example of the tire 1, but the embodiment is not limited to such a tire.
- the length W2 of the land portion 40 in the tire width direction W is 30% or more of the length W1 of the tread portion 10 in the tire width direction W. It is configured as follows.
- the tire 1 according to the first embodiment includes a plurality of belt layers. Specifically, as shown in FIG. 1 and FIG. 2, the tire 1 according to the first embodiment includes two protective belt layers 11 and 11 including two protective belts 11 ⁇ / b> A / 11 ⁇ / b> B in the tread portion 10.
- a main crossing belt layer 12 made of crossing belts 12A / 12B and a small crossing belt layer 13 made of two small crossing belts 13A / 13B are provided.
- the main crossing belt layer 12 is disposed on the outer side in the tire radial direction of the small crossing belt layer 13, and the protection belt layer 11 is formed of the main crossing belt layer 12. It is arranged on the outer side in the tire radial direction.
- the angle formed by the cord constituting the small crossing belt layer 13 and the tire circumferential direction L is 4 to 10 °, and the cord constituting the main crossing belt layer 12
- the angle between the tire circumferential direction L and the tire circumferential direction L is 18 to 35 °
- the angle between the cord constituting the protective cross belt layer 11 and the tire circumferential direction L is 22 to 33 °.
- the tire 1 according to the first embodiment includes, in the tread portion 10, a circumferential groove 30 extending in the tire circumferential direction L or an end portion 10 ⁇ / b> E in the tire width direction W of the tread portion 10; A plurality of land portions 40 partitioned by the width direction grooves 20 extending in the tire width direction W are provided.
- the circumferential groove 30 is a central circumferential groove extending along the tire circumferential direction on the tire equator line CL.
- the circumferential groove 30 has a groove width of 10 mm or less, and the width direction groove has a width of 50 mm or less.
- the land portion 40 may be provided with one or more circumferential narrow grooves (sipes) (circular narrow grooves 70 in FIGS. 8 and 10 to be described later) extending in the circumferential direction of 50 mm or less. Good.
- the depth in the tire radial direction of the circumferential narrow groove is shallower than the depth in the tire radial direction of the circumferential groove 30 and the width groove 20.
- the width of the circumferential groove 30 (the length in the tire width direction W) is preferably 10 mm or less because the land portions 40 support each other when force is applied.
- the width of the circumferential groove 30 (the length in the tire width direction W) is preferably larger than 10 mm.
- the length of the width direction groove 20 in the tire width direction W is configured to be 30% or more of the length W1 of the tread portion 10 in the tire width direction W. Yes.
- the pitch P of each land portion 40 may be configured to be 50 mm or more.
- the width direction groove 20 is bent in at least one side of the tire equator line CL in a direction opposite to at least one tire rotation direction R. It is comprised so that it may have the bending part 50A / 50B comprised.
- the width direction groove 20 has one bent portion 50A on the left side of the tire equator line CL and one bent portion 50B on the right side of the tire equator line CL.
- the width direction groove 20 may have one bent portion 50A (or 50B) only on the left side (or right side) of the tire equator line CL.
- width direction groove 20 may be configured to further include another bent portion in addition to the two bent portions 50A / 50B shown in FIG.
- all the width direction grooves 20 may be configured to have the above-described bent portion, or only a predetermined width direction groove 20 may be configured to have the above-described bent portion.
- channel 20 may be comprised so that it may continue in the tire equator line CL, and may be comprised so that it may not continue in the tire equator line CL.
- the width direction groove 20 is continuous in the tire equator line CL, and is configured to bend in the tire rotation direction R in the tire equator line CL.
- a depression is formed on at least one kicking side of the land portions 40 arranged on both sides of the tire equator line CL.
- bent portions 50A / 50B form protrusions (convex portions) on at least one of the land portions 40 arranged on both sides of the tire equator line CL.
- the tire 1 according to the first embodiment is assumed to have a directional pattern that specifies the rotation direction R of the tire 1. That is, in the tire 1 according to the first embodiment, the mounting direction of the tire 1 with respect to the wheel is determined.
- the width direction groove 20 bent at the bent portions 50A / 50B is inclined by 0 ° to 80 ° with respect to the tire circumferential direction L in the plan view of the tread surface. It may be formed so as to be inclined by 0 ° to 80 ° with respect to the width direction W.
- the inclination angle of the width direction groove 20 with respect to the tire width direction W may be configured to be gentle.
- the land portion 40 has an arrow-shaped shape in a plan view of the tread surface as shown in FIG.
- the bent portions 50 ⁇ / b> A / 50 ⁇ / b> B have a belt layer having the smallest angle between the cord constituting the belt layer and the tire circumferential direction L. That is, it may be provided in the vicinity of the position A in the tire width direction corresponding to the end of the small crossing belt layer 13).
- “in the vicinity of the position A in the tire width direction” is, for example, a distance of 1/4 of the width of the tire 1 (the length in the tire width direction W) from the end portion 10E in the tire width direction W on the tread surface. It is a region having a distance within 1/3 of the width of the land portion 40 (the length in the tire width direction W) in the tire width direction W with the point as the center.
- the length W3 in the tire width direction W between the tire width direction position A and the tire equator line CL may be about 1/4 of the length W1 of the tread portion 10 in the tire width direction W.
- the tire equator than the end portion of the small crossing belt layer 13 is used in the tread portion 10 of the tire 1 according to the first embodiment. Compared with the region A1 on the line CL side, the angle formed between the cords constituting each belt layer and the tire circumferential direction L is large.
- the belt tension is smaller than that in the region A1.
- the region A2 on the end side in the tire width direction W from the end portion of the small crossing belt layer 13 is closer to the tire equator line CL side than the end portion of the small crossing belt layer 13.
- the length of the region A1 in the tire circumferential direction L is longer than the length of the region A2 in the tire circumferential direction L.
- a force in the tire rotation direction R (driving force) is generated in the region A1
- a force (braking force) in the opposite direction to the tire rotation direction R is generated in the region A2.
- a shearing force is generated in the vicinity of the boundary between the region A1 and the region A2 (that is, the region near the end of the small crossing belt layer 13).
- the shearing force generated near the boundary between the region A1 and the region A2 (that is, the region near the end of the small crossing belt layer 13) can be reduced.
- the land portion The force (driving force) F2 in the tire rotation direction R generated at 40 increases.
- the shearing force generated near the boundary between the region A1 and the region A2 (that is, the region near the end of the small crossing belt layer 13) can be reduced.
- a narrow groove (sipe) or various grooves may be further provided according to required performance.
- the width direction groove 20 bent by the bent portions 50A / 50B may be configured to be curved in a curved shape.
- the inclination angle of the widthwise groove 20 with respect to the tire width direction W is configured to be large.
- the driving effect in the peripheral region of the apex 50C of the portion 50A / 50B is increased, and the inclination angle of the widthwise groove 20 with respect to the tire width direction W is decreased in the region other than the peripheral region of the apex 50C.
- the braking effect can be dispersed in a region other than the peripheral region of the vertex 50C.
- the width direction groove 20 has at least two bent portions 51A1 / 51A2 (or 51B1 / 51B2) on at least one side of the tire equator line CL.
- the width direction groove 20 is a flat portion 60A (or alternatively, formed so as to be substantially parallel to the tire width direction W between the two bent portions 51A1 / 51A2 (or 51B1 / 51B2). 60B).
- the flat portion 60A (or 60B) is provided between the two bent portions 51A1 / 51A2 (or 51B1 / 51B2), the flat portion 60A / 60B Driving force is generated as a whole.
- the width direction groove 20 is configured not to be continuous in the tire equator line CL.
- the pitches P1 / P2 of the land portions 40 arranged on both sides of the tire equator line CL may be configured to deviate.
- the deviation amount ⁇ of the pitch P1 / P2 may be 20% or less of the length L1 of each land portion 40 in the tire circumferential direction L.
- the rigidity in the tire circumferential direction L can be made uniform.
- the circumferential narrow groove is formed along the tire circumferential direction L in the land portion 40. 70 may be provided.
- the circumferential narrow groove 70 may be formed in each land portion 40 in a region where the distance from the tire equator line CL to the outer side in the tire width direction is 0.55L to 0.70L.
- L is the length of each land portion 40 in the tire width direction.
- circumferential narrow groove 70 may be configured to intersect the vertex 50C of the bent portions 50A / 50C (or the peripheral region of the vertex 50C) and extend in the tire circumferential direction L.
- the land portions 40A / 40B arranged on both sides of the tire equator line CL are configured to have different shapes. May be.
- the width (the length in the tire width direction W) of the land portions 40A / 40B disposed on both sides of the tire equator line CL. ) May be configured differently.
- the ratio of the width of the land portion 40A / 40B disposed on one side of the tire equator line CL and the width of each land portion 40 disposed on the other side of the tire equator line CL is 6: It may be in the range of 4-9: 1.
- the pattern of the left land portion 40A and the pattern of the right land portion 40B are not line symmetric with respect to the tire equator line.
- the tire 1 according to the fifth modification of the first embodiment is effective when the ground contact surface input of the tire 1 is different in the tire width direction W when the camber angle is added.
- the width direction groove 20 has two bent portions 51A1 / 51A2 on the left side of the tire equator line CL, and two on the right side of the tire equator line CL. It has a bent portion 51B1 / 51B2.
- the width direction groove 20 is a flat portion 60A (or alternatively, formed so as to be substantially parallel to the tire width direction W between the two bent portions 51A1 / 51A2 (or 51B1 / 51B2). 60B).
- a circumferential narrow groove 70A that intersects the flat portion 60A and extends in the tire circumferential direction L is provided on the left side of the tire equator line CL.
- a circumferential narrow groove 70B that intersects the flat portion 60B and extends in the tire circumferential direction L is provided on the left side of the tire equator line CL.
- the circumferential groove 30 is a central circumferential groove extending along the tire circumferential direction on the tire equator line CL.
- the width direction groove 20 has a bent portion 50A (or a bent portion 50B) and extends from the end 10E of the tread 10 in the tire width direction W to the circumferential groove 30 (center circumferential groove).
- the plurality of land portions 40 include a center land portion 40C formed in a tread center region CR including the tire equator line CL as a center in the tire width direction W.
- the tread center region CR has a width of 40% or less of the length W1 of the tread portion in the tire width direction.
- the ratio P / H between the length P of the central land portion 40B in the tire circumferential direction and the height H of the central land portion in the tire radial direction is 2 or more and 3.5 or less.
- the height H of the central land portion 40C in the tire radial direction is, as shown in FIG. 11A, the deepest portion of the width direction groove 20 (here, the second groove 20B) defining the central land portion 40C and the tire diameter. It is the distance in the tire radial direction between the outermost part of the central land portion 40C in the direction.
- the height H of the central land portion 40C is between the deepest deepest portion and the outermost portion. Is the distance in the tire radial direction.
- the length P of the central land portion 40C in the tire circumferential direction L is the length of the central land portion 40C in the tire circumferential direction L, that is, two width direction grooves 20 (here, the second groove) sandwiching the central land portion 40C. 20B) is the average value of the distance in the tire circumferential direction L.
- the average value is the average value of the calculated distances by calculating the distance in the tire circumferential direction L between the two width direction grooves 20 (here, the second grooves 20B) for the entire central land portion 40C. is there.
- the ratio P / H is in the range of 2 or more and 3.5 or less, in the tread center portion where the tagging effect is large, while securing the shear rigidity of the central land portion 40C, the rubber of the central land portion 40C is secured. Ease of flow can be reduced, wear at the tread center portion can be suppressed, and uneven wear occurring between the tread center portion and the tread shoulder portion can be suppressed.
- FIG. 12 shows the ratio P / H related to the size of the central land portion 40C, the shear rigidity of the central land portion 40C (shown by a solid line), and the ease of rubber flow of the central land portion 40C (shown by a broken line). If the length P of the central land portion 40C in the tire circumferential direction L is too small with respect to the height H of the central land portion 40C, the shear rigidity of the central land portion 40C rapidly decreases. In addition, the driving shear deformation suddenly increases. On the other hand, if the length P of the central land portion 40C in the tire circumferential direction L is too large with respect to the height H of the central land portion 10C, the flow of rubber becomes too large and driving shear deformation becomes large.
- the “braking state” is a state opposite to the “driving state”, and the tread deformation is a state in which the tire inner surface side is sheared forward and the tread tread surface is sheared rearward. Ng) tire condition.
- the width direction groove 20 is formed in at least a part of the first groove 20A extending from the end portion 10E of the tread 10 in the tire width direction W toward the inside of the tire width direction W and the tread central region. 2 grooves.
- the depth h1 of the second groove 20B in the tire radial direction is 80% or less of the depth h2 of the first groove 20A in the tire radial direction.
- the depth h1 of the second groove 20B refers to the maximum depth of the second groove 20B as shown in FIG.
- the depth h2 of the first groove 20A is the maximum depth of the first groove 20A as shown in FIG.
- the radial tire shown in FIG. 3 having the widthwise grooves 20 having the bent portions 50A / 50B is used as the tire according to Example 1, and the bent portions 50A / 50B are used as the tire according to Comparative Example 1.
- a radial tire having no width direction groove 20 was used.
- the size of all radial tires was set to “tire size 46 / 90R57”. Further, in this test, the position A in the tire width direction shown in FIG. 1 was measured using a measuring device described in JP-A-7-63658, with a speed of 50 mm / s, a load of 3.5 kN, and an internal pressure of 0.19 MPa. The wear energy was measured.
- the width of the rim used in this test was 5-J ⁇ 14 (standard size specified by JATMA).
- the tire according to Example 1 having the configuration of the first embodiment has a wear energy reduced by about 20% as compared with the tire according to Comparative Example 1.
- Example 2 In order to clarify the effect of the modified example 6, the results of tests performed using tires according to comparative examples 2 and 3 and example 2-4 will be described.
- the tires according to Comparative Examples 2 and 3 and Example 2-4 have the tread pattern shown in FIG. 10 and have the same configuration except for the ratio P / H.
- the ratio P / H is as shown in Table 1.
- the abrasion energy was measured by measuring with a tire tread contact portion measuring device described in JP-A-7-63658.
- Example 2-4 in which the ratio P / H is within an appropriate range, it can be seen that the wear energy is significantly lower than in Comparative Examples 2 and 3.
- the tires according to Examples 5 and 6 are the same as the tire according to Example 3 except for the ratio h1 / h2.
- the ratio h1 / h2 is as shown in Table 2.
- Example 5 The tires according to Examples 5 and 6 were incorporated into the applicable rim, mounted on the drive wheels of the vehicle, filled with the internal pressure specified by JATMA, etc., loaded with the specified load, and after running for 4000 hours, the tread surface of each tire was As a result of observation, in Example 5, the minor groove remained in the tread central portion, but in Example 6, it was confirmed that the minor groove had disappeared.
- Example 6 in which the ratio h1 / h2 is within an appropriate range is superior to Example 5 in cut resistance.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
図1乃至図4を参照して、第1の実施形態に係るタイヤ1について説明する。
以下、図5を参照して、第1の実施形態の変更例1に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
以下、図6を参照して、第1の実施形態の変更例2に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
以下、図7を参照して、第1の実施形態の変更例3に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
以下、図8を参照して、第1の実施形態の変更例4に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
以下、図9を参照して、第1の実施形態の変更例5に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
以下、図10を参照して、第1の実施形態の変更例6に係るタイヤ1について、上述の実施形態1に係るタイヤとの相違点に着目して説明する。
第1の実施形態の効果を明確にするために、比較例1及び実施例1に係るタイヤを用いて行った試験の結果について説明する。なお、本発明は、これらの例によって何ら限定されるものではない。
変更例6の効果を明確にするために、比較例2、3及び実施例2-4に係るタイヤを用いて行った試験の結果について説明する。比較例2、3及び実施例2-4に係るタイヤは、図10に示すトレッドパターンを有しており、比率P/Hを除いて同様の構成を有する。比率P/Hについては、表1に示す通りである。
変更例6の効果を明確にするために、実施例5,6に係るタイヤを用いて行った試験の結果について説明する。
Claims (7)
- トレッド部に形成された複数の陸部を備えるタイヤであって、
前記複数の陸部は、タイヤ周方向に延びる周方向溝とタイヤ幅方向に沿って延びる幅方向溝とによって区画されており、或いは、前記タイヤ幅方向における前記トレッド部の端部と前記幅方向溝とによって区画されており、
前記タイヤ幅方向における前記幅方向溝の長さは、前記タイヤ幅方向における前記トレッド部の長さの30%以上であり、
前記幅方向溝は、タイヤ赤道線の少なくとも片側において、少なくとも1つのタイヤ回転方向の反対方向に屈曲するように構成されている屈曲部を有することを特徴とするタイヤ。 - 前記周方向溝は、前記タイヤ赤道線上においてタイヤ周方向に沿って延びる中心周方向溝を有しており、
前記屈曲部を有する前記幅方向溝は、前記タイヤ幅方向における前記トレッド部の端部から前記中心周方向溝まで延びることを特徴とする請求項1に記載のタイヤ。 - 前記複数の陸部は、前記タイヤ幅方向における中心として前記タイヤ赤道線を含むトレッド中心領域に形成された中心陸部を含み、
前記トレッド中心領域は、前記タイヤ幅方向において、前記トレッド部の長さの40%以下の幅を有しており、
前記タイヤ周方向における前記中心陸部の長さPとタイヤ径方向における前記中心陸部の高さHとの比率P/Hは、2以上かつ3.5以下であることを特徴とする請求項2に記載のタイヤ。 - 前記幅方向溝は、前記タイヤ幅方向における前記トレッド部の端部から前記タイヤ幅方向の内側に沿って延びる第1溝と、前記トレッド中心領域の少なくとも一部に形成される第2溝とを含み、
前記タイヤ径方向における前記第2溝の深さh1は、前記タイヤ径方向における前記第1溝の深さh2の80%以下であることを特徴とする請求項3に記載のタイヤ。 - 複数のベルト層を具備しており、
前記屈曲部の少なくとも1つは、前記ベルト層を構成するコードと前記タイヤ周方向となす角度が最も小さいベルト層の端部に対応するタイヤ幅方向位置の近傍に設けられていることを特徴とする請求項1又は請求項2に記載のタイヤ。 - 前記幅方向溝は、前記タイヤ赤道線の少なくとも片側において、少なくとも2つの前記屈曲部を有しており、
前記幅方向溝は、前記2つの屈曲部の間において、前記タイヤ幅方向に対して概平行になるように形成されている平坦部を有することを特徴とする請求項1又は請求項2に記載のタイヤ。 - 前記平坦部と交差し前記タイヤ周方向に延びる周方向細溝が設けられていることを特徴とする請求項6に記載のタイヤ。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2870662A CA2870662C (en) | 2012-04-16 | 2013-04-16 | Tire |
ES13777967.4T ES2637691T3 (es) | 2012-04-16 | 2013-04-16 | Neumático |
EP13777967.4A EP2839974B1 (en) | 2012-04-16 | 2013-04-16 | Tire |
AU2013250298A AU2013250298B2 (en) | 2012-04-16 | 2013-04-16 | Tyre |
RU2014145831/11A RU2605220C2 (ru) | 2012-04-16 | 2013-04-16 | Шина |
CN201380019659.5A CN104245363B (zh) | 2012-04-16 | 2013-04-16 | 轮胎 |
US14/391,342 US10093131B2 (en) | 2012-04-16 | 2013-04-16 | Tire |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012093094A JP6013759B2 (ja) | 2012-04-16 | 2012-04-16 | 空気入りタイヤ |
JP2012093008A JP5986789B2 (ja) | 2012-04-16 | 2012-04-16 | タイヤ |
JP2012-093008 | 2012-04-16 | ||
JP2012-093094 | 2012-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013157544A1 true WO2013157544A1 (ja) | 2013-10-24 |
Family
ID=49383500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/061285 WO2013157544A1 (ja) | 2012-04-16 | 2013-04-16 | タイヤ |
Country Status (8)
Country | Link |
---|---|
US (1) | US10093131B2 (ja) |
EP (1) | EP2839974B1 (ja) |
CN (1) | CN104245363B (ja) |
AU (1) | AU2013250298B2 (ja) |
CA (1) | CA2870662C (ja) |
ES (1) | ES2637691T3 (ja) |
RU (1) | RU2605220C2 (ja) |
WO (1) | WO2013157544A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3022493B1 (fr) * | 2014-06-24 | 2016-07-01 | Michelin & Cie | Bande de roulement incisee pour pneu genie civil |
KR101730484B1 (ko) * | 2015-04-06 | 2017-04-26 | 박계정 | 스파이크가 결합된 타이어 구조 |
WO2017170562A1 (ja) * | 2016-03-31 | 2017-10-05 | 横浜ゴム株式会社 | 重荷重用空気入りタイヤ |
CN109195817B (zh) * | 2016-05-27 | 2020-10-20 | 株式会社普利司通 | 重负载用轮胎 |
BR112021022159A2 (pt) * | 2019-05-14 | 2021-12-21 | Michelin & Cie | Pneu para um veículo pesado do tipo para construção civil, dotado de um reforço de proteção que tem três camadas diferenciadas |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0763658B2 (ja) | 1990-04-25 | 1995-07-12 | 株式会社丸山製作所 | 散布車用散布液タンク及びその製造方法 |
JP2002337513A (ja) * | 2001-05-14 | 2002-11-27 | Bridgestone Corp | 空気入りタイヤ及びその装着方法 |
JP2005112030A (ja) * | 2003-10-03 | 2005-04-28 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2006341792A (ja) * | 2005-06-10 | 2006-12-21 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP4628080B2 (ja) | 2004-12-10 | 2011-02-09 | 株式会社ブリヂストン | 重荷重用空気入りラジアルタイヤ |
JP4677307B2 (ja) | 2005-08-29 | 2011-04-27 | 株式会社ブリヂストン | 重荷重用空気入りラジアルタイヤ |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL130937C (ja) * | 1959-11-10 | |||
US3896869A (en) * | 1970-04-13 | 1975-07-29 | Toyo Tire & Rubber Co | Radial pneumatic tire having a compensating cord layer |
JPS5926306A (ja) | 1982-08-03 | 1984-02-10 | Honda Motor Co Ltd | 車両用タイヤ |
JPS6171203A (ja) * | 1984-09-17 | 1986-04-12 | Bridgestone Corp | 空気入りラジアルタイヤ |
US4823855A (en) * | 1987-11-23 | 1989-04-25 | The Goodyear Tire & Rubber Company | Pneumatic tire tread pattern |
JP2908461B2 (ja) | 1988-11-08 | 1999-06-21 | 株式会社ブリヂストン | 重荷重用空気入りラジアルタイヤ |
JPH02128905A (ja) * | 1988-11-09 | 1990-05-17 | Sumitomo Rubber Ind Ltd | Atv用タイヤ |
JPH06191232A (ja) * | 1992-12-25 | 1994-07-12 | Yokohama Rubber Co Ltd:The | 雪氷路用空気入りタイヤ |
JP3406643B2 (ja) | 1993-06-30 | 2003-05-12 | 株式会社ブリヂストン | タイヤ踏面の接地部測定装置及びタイヤ踏面の接地部測定方法 |
JP3559378B2 (ja) * | 1996-02-29 | 2004-09-02 | 株式会社ブリヂストン | 空気入りタイヤ対 |
US6481480B1 (en) * | 1996-06-07 | 2002-11-19 | The Goodyear Tire & Rubber Company | Convertible tread for a radial truck or trailer tire |
JP4081177B2 (ja) * | 1997-07-07 | 2008-04-23 | 株式会社ブリヂストン | 空気入りタイヤ |
JP2003136911A (ja) * | 2001-11-07 | 2003-05-14 | Bridgestone Corp | 重荷重用空気入りラジアルタイヤ |
JP4256173B2 (ja) | 2003-01-21 | 2009-04-22 | 住友ゴム工業株式会社 | 重荷重用ラジアルタイヤ |
DE10311430A1 (de) * | 2003-03-13 | 2004-09-23 | Manfred Schildhauer | Luftreifen für Kraftfahrzeuge |
JP4424003B2 (ja) | 2004-02-26 | 2010-03-03 | 横浜ゴム株式会社 | 建設車両用空気入りラジアルタイヤ |
JP4330561B2 (ja) * | 2005-07-12 | 2009-09-16 | 住友ゴム工業株式会社 | 重荷重用タイヤ |
JP5002202B2 (ja) * | 2006-07-05 | 2012-08-15 | 株式会社ブリヂストン | 建設車両用空気入りタイヤ |
JP4805762B2 (ja) | 2006-09-05 | 2011-11-02 | 株式会社ブリヂストン | 建設車両用タイヤ |
JP5115487B2 (ja) * | 2009-01-27 | 2013-01-09 | 横浜ゴム株式会社 | 空気入りタイヤ |
US20100236681A1 (en) * | 2009-03-17 | 2010-09-23 | Daniel Ray Beha | Tire having tread blocks with blended walls |
USD722013S1 (en) * | 2012-07-04 | 2015-02-03 | Bridgestone Corporation | Tread portion of an automobile tire |
-
2013
- 2013-04-16 US US14/391,342 patent/US10093131B2/en active Active
- 2013-04-16 WO PCT/JP2013/061285 patent/WO2013157544A1/ja active Application Filing
- 2013-04-16 RU RU2014145831/11A patent/RU2605220C2/ru active
- 2013-04-16 AU AU2013250298A patent/AU2013250298B2/en active Active
- 2013-04-16 CN CN201380019659.5A patent/CN104245363B/zh active Active
- 2013-04-16 EP EP13777967.4A patent/EP2839974B1/en active Active
- 2013-04-16 ES ES13777967.4T patent/ES2637691T3/es active Active
- 2013-04-16 CA CA2870662A patent/CA2870662C/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0763658B2 (ja) | 1990-04-25 | 1995-07-12 | 株式会社丸山製作所 | 散布車用散布液タンク及びその製造方法 |
JP2002337513A (ja) * | 2001-05-14 | 2002-11-27 | Bridgestone Corp | 空気入りタイヤ及びその装着方法 |
JP2005112030A (ja) * | 2003-10-03 | 2005-04-28 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP4628080B2 (ja) | 2004-12-10 | 2011-02-09 | 株式会社ブリヂストン | 重荷重用空気入りラジアルタイヤ |
JP2006341792A (ja) * | 2005-06-10 | 2006-12-21 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP4677307B2 (ja) | 2005-08-29 | 2011-04-27 | 株式会社ブリヂストン | 重荷重用空気入りラジアルタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2839974A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20150107741A1 (en) | 2015-04-23 |
EP2839974A1 (en) | 2015-02-25 |
EP2839974A4 (en) | 2015-09-02 |
CN104245363A (zh) | 2014-12-24 |
RU2014145831A (ru) | 2016-06-10 |
AU2013250298B2 (en) | 2016-06-09 |
ES2637691T3 (es) | 2017-10-16 |
US10093131B2 (en) | 2018-10-09 |
CA2870662A1 (en) | 2013-10-24 |
EP2839974B1 (en) | 2017-05-31 |
AU2013250298A1 (en) | 2014-11-13 |
CN104245363B (zh) | 2017-10-24 |
CA2870662C (en) | 2018-07-03 |
RU2605220C2 (ru) | 2016-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10500904B2 (en) | Tire | |
JP6084195B2 (ja) | 空気入りタイヤ | |
WO2009107436A1 (ja) | 空気入りタイヤ | |
US20170267031A1 (en) | Pneumatic tire | |
WO2016167122A1 (ja) | ランフラットタイヤ | |
WO2015064297A1 (ja) | 不整地走行用の自動二輪車用タイヤ | |
WO2013157544A1 (ja) | タイヤ | |
WO2015008752A1 (ja) | タイヤ | |
JP6988349B2 (ja) | タイヤ | |
JP5986789B2 (ja) | タイヤ | |
AU2016336311A1 (en) | Pneumatic tire | |
CN110091677B (zh) | 不平坦地面行驶用的摩托车用轮胎 | |
JP2017087858A (ja) | 空気入りタイヤ | |
JP6790841B2 (ja) | 空気入りタイヤ | |
JP6082367B2 (ja) | 空気入りタイヤ | |
WO2016013601A1 (ja) | 重荷重用空気入りタイヤ | |
JP6133679B2 (ja) | タイヤ | |
WO2016152692A1 (ja) | 自動二輪車用タイヤ | |
WO2017022206A1 (ja) | 自動二輪車用空気入りタイヤ | |
JP5827381B2 (ja) | タイヤ | |
EP3165381A1 (en) | Tire | |
JP2016041549A (ja) | 空気入りタイヤ | |
JP5640440B2 (ja) | 空気入りタイヤ | |
WO2017204353A1 (ja) | 重荷重用タイヤ | |
CN109153291B (zh) | 重负载用轮胎 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13777967 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14391342 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2870662 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2013777967 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013777967 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2013250298 Country of ref document: AU Date of ref document: 20130416 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2014145831 Country of ref document: RU Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014025783 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112014025783 Country of ref document: BR Kind code of ref document: A2 Effective date: 20141016 |