WO2017010061A1 - Bandage pneumatique pour véhicule automobile à deux roues - Google Patents

Bandage pneumatique pour véhicule automobile à deux roues Download PDF

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Publication number
WO2017010061A1
WO2017010061A1 PCT/JP2016/003208 JP2016003208W WO2017010061A1 WO 2017010061 A1 WO2017010061 A1 WO 2017010061A1 JP 2016003208 W JP2016003208 W JP 2016003208W WO 2017010061 A1 WO2017010061 A1 WO 2017010061A1
Authority
WO
WIPO (PCT)
Prior art keywords
tire
block
width direction
narrow
circumferential direction
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2016/003208
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English (en)
Japanese (ja)
Inventor
裕史 大庭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
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 JP2016057513A external-priority patent/JP6637804B2/ja
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to CN201680041143.4A priority Critical patent/CN107848339B/zh
Priority to US15/739,943 priority patent/US10780744B2/en
Priority to EP16824047.1A priority patent/EP3323636B1/fr
Publication of WO2017010061A1 publication Critical patent/WO2017010061A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1353—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove bottom
    • 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
    • B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
    • 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
    • B60C2200/10—Tyres specially adapted for particular applications for motorcycles, scooters or the like
    • 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
    • B60C2200/14—Tyres specially adapted for particular applications for off-road use

Definitions

  • the present invention relates to a pneumatic tire for a motorcycle that is particularly effectively used as a pneumatic tire for a motorcycle for traveling on rough terrain.
  • An object of the present invention is to provide a pneumatic tire for a motorcycle having both traction performance and cornering grip performance.
  • the gist configuration of the present invention is as follows.
  • the pneumatic tire for a motorcycle of the present invention has a plurality of blocks arranged on the tread tread, and the two regions closest to the tire equatorial plane when the developed width of the tread tread is divided into six equal parts in the tire width direction are centered.
  • the two outermost regions in the tire width direction are shoulder regions, and the two regions located between the center region and the shoulder regions are intermediate regions, at least the center region and the intermediate region
  • a wide block having a length in the tire width direction longer than a length in the tire circumferential direction is formed, and a narrow block having a length in the tire width direction shorter than the wide block is formed at least in the intermediate region.
  • the width of the wide block in the tire circumferential direction is L1
  • the tire width of the wide block is W2
  • the tire width direction length of the narrow block is W2
  • the tread area of the wide block is S1
  • the tread area of the narrow block Where S2 is the area of the tread located in the intermediate region of the area S1
  • S2M is the area of the tread located in the intermediate region of the area S2
  • the following relational expressions (A) to (D) It is characterized by satisfying.
  • tire circumferential lengths L1 and L2 refer to the projected length in the tire circumferential direction of the block in the development view of the tread tread
  • tire width lengths W1 and W2 refer to tread treads. The projected length in the tire width direction of the block in the unfolded view.
  • the tire circumferential direction substantially the same phase means that the tire circumferential direction length that overlaps when the wide block and the narrow block are projected in the tire width direction is the tire circumferential direction length L1 of the wide block. Or it shall say that it is 80% or more of the tire circumferential direction length L2 of a narrow block.
  • the inclination angle of the wall surface with respect to the tire radial direction means, as shown in FIG. 5, the tire radial direction outer end in the tire radial direction range Y from the connection point with the tread surface to the surface of the block. Is an inclination angle ⁇ formed by a line segment connecting a tire radial direction outer end and a tire radial direction inner end of the wall surface with respect to the tire radial direction in an area Y1 in the tire radial direction of 80% from the tire radial direction to the tire radial direction. Shall.
  • the “bottom part” means a tire radial direction range Y from the connection point with the tread surface to the surface of the block, from the tire radial direction inner end (connection point with the tread surface) to the tire radial direction outer side.
  • the portion in the region Y2 in the tire radial direction of 20% shall be said.
  • FIG. 1 is a development view showing a tread pattern of a pneumatic tire for a motorcycle according to an embodiment of the present invention.
  • 1 is a schematic cross-sectional view in a tire width direction of a pneumatic tire for a motorcycle according to an embodiment of the present invention.
  • FIG. 6 is a partial development view showing a part of a tread pattern of a pneumatic tire for a motorcycle according to another embodiment of the present invention.
  • (A) It is a top view which compares and shows the wide block in the tread pattern of FIG. 1, and the wide block in the tread pattern of FIG.
  • B It is a top view which compares and shows the narrow block in the tread pattern of FIG. 1, and the narrow block in the tread pattern of FIG. It is a figure for demonstrating the inclination angle of the wall surface of a block, and the curvature radius of a bottom part.
  • FIG. 2 is a schematic cross-sectional view (AA cross-sectional view in FIG. 1) in the tire width direction of a pneumatic tire for a motorcycle (hereinafter also simply referred to as a tire) according to an embodiment of the present invention.
  • the internal structure of the tire is not particularly limited.
  • the tire 1 includes a pair of bead parts 2 and a pair of bead parts 2. It has the side wall part 3 and the tread part 4 which makes a toroid shape between both the side wall parts 3, and continues.
  • this tire has one layer in the illustrated example on the outer side in the tire radial direction of the carcass 5 composed of two carcass plies in the illustrated example straddling between the pair of bead cores 2a embedded in the pair of bead portions 2 in the illustrated example.
  • a belt 6 made of a belt layer is provided.
  • the carcass structure may be a radial structure or a bias structure.
  • FIG. 1 is a diagram showing a tread pattern of a pneumatic tire for a motorcycle according to an embodiment of the present invention.
  • a plurality of blocks 7 are arranged on the tread surface 4a.
  • a pattern that is line symmetric in the development view of the tread tread surface 4a with respect to the tire equatorial plane CL is formed on one side and the other side of the tread tread surface 4a with respect to the tire equatorial plane CL. They are shifted from each other in the tire circumferential direction between the direction halves.
  • two rows are arranged in the tire width direction half of the tread tread surface 4a, and a total of four rows of block rows along the tire circumferential direction are arranged in the entire tread tread surface 4a.
  • the two regions closest to the tire equatorial plane CL are centered when the development width of the tread tread surface 4a (between both tread ends TE) is equally divided into six in the tire width direction.
  • the region C is defined as two regions on the outermost side in the tire width direction as shoulder regions S, and the two regions positioned between the center region C and shoulder region S are defined as intermediate regions M, respectively.
  • the tire includes a wide block 7 a having a length in the tire width direction longer than a length in the tire circumferential direction, at least in the center region C and the intermediate region M, and a wide block having at least the intermediate region M.
  • Center block rows in which narrow blocks 7b having a shorter length in the tire width direction than 7a are alternately arranged in the tire circumferential direction are shifted in phase in the tire circumferential direction between the half portions in the tire width direction, and a plurality of rows (FIG. In the illustrated example, one row is formed in each half of the tread width direction, and the entire tread surface 4a is formed in two rows in total.
  • the width W1 of the wide block 7a in the tire width direction is about twice the tire width direction length W2 of the narrow block 7b adjacent in the tire circumferential direction in the center block row.
  • the inner end of the block 7a in the tire width direction is located on the tire equatorial plane CL, and the outer end of the wide block 7a in the tire width direction is substantially the same position as the outer end of the narrow block 7b in the tire width direction.
  • the wide block 7a in one half of the tire width direction and the narrow block 7b in the other half are substantially in the same position in the tire circumferential direction, and the wide block 7a in the other half
  • the narrow block 7b in the one half is located at substantially the same position in the tire circumferential direction.
  • the wide block 7a exists only in the center region C and the intermediate region M, but the outer end in the tire width direction of the wide block 7a may exist in the shoulder region S. Further, the inner end in the tire width direction of the wide block 7a may be located outside the tire equatorial plane CL in the center region C, and the other end in the tire width direction beyond the tire equatorial plane CL. It may exist in the half.
  • the narrow block 7b exists only in the intermediate region M (that is, the entire narrow block 7b exists in the intermediate region M), but the inner end in the tire width direction thereof It may exist in the center area
  • side blocks 7c that are present at least in the shoulder region S are formed in each half of the tire width direction
  • a side block row in which a plurality of side blocks 7c are arranged in the tire circumferential direction is arranged in one row in the illustrated example (that is, two rows in the entire tread surface 4a).
  • the two side block rows are aligned in the tire circumferential direction.
  • the center block row and the side block row are arranged so that the wide block 7a or the narrow block 7b and the side block 7c do not have overlapping portions when projected in the tire width direction.
  • the wide block 7a, the narrow block 7b, and the side block 7c are arranged point-symmetrically around the point X, and this point-symmetric pattern is It is the structure arranged repeatedly in the tire circumferential direction.
  • the wide block 7a has a substantially rectangular shape in which the length in the tire width direction is longer than the length in the tire circumferential direction when the tread tread surface 4 a is developed.
  • the wide block 7a has a single recess 8 at the center of the wide block in the tire width direction.
  • the recessed part 8 is formed as the circumferential direction fine groove 8, and the circumferential direction fine groove 8 is extended to the tire circumferential direction both ends of this wide block 7a.
  • the “center in the tire width direction” refers to the midpoint position in the tire width direction between the end on one side and the end on the other side of the wide block 7a in the tire width direction.
  • one protrusion 9 is formed on each side of the circumferential narrow groove 8 formed in the wide block 7a in the illustrated example. As shown in FIG. 2, the portion where the protrusion 9 is formed is higher than the height of the other portion of the wide block 7a. Furthermore, in the development view of the tread surface 4a, the protrusion 9 has a horizontally long shape in which the length in the tire width direction is longer than the length in the tire circumferential direction. A protrusion peripheral recess 10 is formed on the periphery of the protrusion 9.
  • the narrow block 7b has a substantially hexagonal shape with a shorter length in the tire width direction than the wide block 7a in a developed view of the tread surface 4a. There is no.
  • one projection 9 is formed in the narrow block 7b in the illustrated example.
  • the portion where the protrusion 9 is formed is higher than the height of the other portion of the narrow block 7b.
  • the protrusion 9 has a substantially hexagonal shape that is substantially similar to the narrow block 7b in a developed view of the tread surface 4a.
  • a protrusion peripheral recess 10 is formed on the periphery of the protrusion 9.
  • the side block 7c has a substantially trapezoidal shape in a developed view of the tread surface 4a.
  • one protrusion 9 is formed on the side block 7 c in the illustrated example.
  • the portion where the protrusion 9 is formed is higher than the height of the other portion of the side block 7c.
  • the protrusion 9 has a substantially trapezoidal shape that is substantially similar to the side block in a developed view of the tread surface 4a.
  • a protrusion peripheral recess 10 is formed on the periphery of the protrusion 9.
  • the tread tread surface 4 a is formed with a groove portion that partitions the block 7 and extends over the entire tread tread surface 4 a.
  • a circumferential groove 11 that extends continuously in the tire circumferential direction between the center block row and the side block row in the tire width direction in each half of the tire width direction with the tire equatorial plane CL as a boundary.
  • one piece is formed (that is, two pieces in the entire tread surface 4a).
  • the tire circumferential direction length of the wide block 7a is L1
  • the tire width direction length of the wide block 7a is W1
  • the narrow block 7b is in a developed view of the tread surface.
  • the length in the tire circumferential direction is L2
  • the length in the tire width direction of the narrow block 7b is W2
  • the area of the tread surface of the wide block 7a refers to the area surrounded by the periphery of the wide block 7a, the concave portion 8, the protrusion 9, S1 is an area of the tread surface of the narrow block 7b (including the protrusion 9 and the protrusion peripheral recess 10 is included).
  • the wide block 7a satisfying the relationship of 1.5 ⁇ W1 / L1 ⁇ 4.0 is present in the center region C and the intermediate region M.
  • a large edge component with respect to the direction can be ensured to improve the traction performance. That is, when the ratio W1 / L1 is less than 1.5, the edge component with respect to the tire circumferential direction decreases, so that the traction performance deteriorates.
  • the ratio W1 / L1 is more than 4.0, the durability of the wide block 7a is deteriorated.
  • the narrow block 7b satisfying the relationship of 0.5 ⁇ W2 / L2 ⁇ 1.5 exists at least in the intermediate region M, cornering grip performance can be ensured.
  • the ratio W2 / L2 is more than 1.5, the clearance cannot be secured, and the width direction block rigidity becomes excessive, so that the proper collapse of the block in the tire width direction cannot be obtained. The grip performance will be reduced.
  • the ratio W2 / L2 when the ratio W2 / L2 is less than 0.5, the edge component with respect to the tire circumferential direction decreases, so that the traction performance in the front-rear direction decreases. Even if the ratio W2 / L2 is greater than 1.5, if both W2 and L2 are reduced, the block stiffness in the tire width direction will not increase too much, but the edge component in the tire circumferential direction will decrease. Traction performance will be reduced. On the other hand, even if the ratio W2 / L2 is less than 0.5, if both W2 and L2 are increased, the edge component in the tire circumferential direction can be secured and the traction performance can be secured, but the tire circumferential direction can be secured.
  • the block rigidity becomes excessive, and a proper collapse of the block in the tire circumferential direction cannot be obtained, so that the traction performance is deteriorated.
  • the area S2 of the tread surface of the narrow block 7b and the area S2M of the tread surface of the portion of the narrow block 7b existing in the intermediate region M satisfy the relationship of 0.5 ⁇ S2M / S2 ⁇ 1.0. Therefore, it is possible to ensure grip performance during middle camber. That is, when the ratio S2M / S2 is less than 0.5, the ground contact area where the grip can be efficiently exhibited in the intermediate region M used during the middle camber is smaller than the area of the narrow block 7b. The grip performance during medium camber is reduced. As described above, according to the pneumatic tire for motorcycles of the present embodiment, both traction performance and cornering grip performance can be achieved.
  • the relational expression 0.25 ⁇ N2 / N1 ⁇ 4.0 is satisfied. It is preferable to satisfy.
  • the ratio N2 / N1 is less than 0.25, the number of the narrow blocks 7b existing in the intermediate region M decreases, and the cornering grip performance decreases.
  • the ratio N2 / N1 exceeds 4.0, the number of wide blocks 7a existing in the intermediate region M decreases, and the traction performance decreases. More preferably, it is preferable to satisfy 0.30 ⁇ N2 / N1 ⁇ 3.0.
  • the wide block 7a and the narrow block 7b are provided in pairs (one at a time) at positions substantially in phase with the tire circumferential direction. It is preferable that the wide block 7a and the narrow block 7b, which are positioned in substantially the same phase in the tire circumferential direction, are located in different halves in the tire width direction with the tire equatorial plane CL as a boundary.
  • the clearance in the embodiment shown in FIG.
  • the width of the clearance existing between the wide block 7a and the narrow block 7b in the tire width direction is approximately the same as the width W2 of the narrow block 7b in the tire width direction.
  • the edge component in the tire circumferential direction is secured, and the traction performance is further secured. This is because the traction performance and the cornering grip performance can be further made compatible.
  • the recess 8 is preferably a circumferential narrow groove 8 extending in the tire circumferential direction as in the present embodiment. This is because the edge component in the tire width direction can be further secured to further ensure cornering grip performance.
  • the wide block 7a may be provided with a widthwise narrow groove extending in the tire width direction as a recess. Furthermore, a plurality of recesses 8 may be provided.
  • the protrusions 9 are formed on both sides in the tire width direction of the concave portion 8 of the wide block 7a as in the present embodiment. This is because it is possible to further secure the edge component in the tire circumferential direction and further improve the traction performance. Moreover, it is because the edge component with respect to the tire width direction can be further secured, and the cornering grip performance can be further secured.
  • the protrusions 9 are provided on both sides of the recess 8, but the protrusions 9 may be provided only on one side.
  • the narrow blocks 7b and the side blocks 7c are also preferably provided with protrusions 9, and the protrusion peripheral edge recesses 10 are preferably provided at the periphery of the protrusions 9.
  • the length of the protrusion in the tire circumferential direction refers to the length of the portion that becomes the maximum length when the dimension of the protrusion is measured along the tire circumferential direction in the development view of the tread surface.
  • “Length of protrusion in the tire width direction” In the development view of the tread surface, the length of the portion that becomes the maximum length when the dimension of the protrusion is measured along the tire width direction.
  • the recess 8 is the circumferential narrow groove 8, and the depth / block height of the circumferential narrow groove 8 is 0. It is preferably 6 or less, and more preferably 0.35 or less. This is because the occurrence of cracks from the groove bottom of the circumferential narrow groove 8 can be suppressed to ensure the durability of the wide block 7a.
  • FIG. 3 is a partial development view showing a part of a tread pattern of a pneumatic tire for a motorcycle according to another embodiment of the present invention.
  • the wide block 7a exists in the center region C and the intermediate region M in one half of the tire width direction centered on the tire equator surface CL, and crosses the tire equator surface CL. 1 is different from the tread pattern shown in FIG. 1 in that it is also present in the center region C of the other half in the tire width direction.
  • the tire of the embodiment shown in FIG. 3 is a recess that exists in the center region C and the intermediate region M in the tire width direction and exists between the wide block 7a and the narrow block 7b in the tire circumferential direction. 1 is different from the tread pattern shown in FIG.
  • the recess 12 is inclined with respect to the tire width direction such that the side adjacent to the wide block 7 a is separated from the wide block 7 a by a distance in the tire circumferential direction toward the inner side in the tire width direction.
  • the recessed part 12 has comprised the shape which has the substantially triangular shape of planar view which protrudes in the tire circumferential direction by the side of the narrow block 7b in the tire width direction inner side from the tire width direction center position.
  • FIG. 4A is a plan view showing a comparison between the wide block in the tread pattern of FIG. 1 and the wide block in the tread pattern of FIG. 4B is a plan view showing the narrow block in the tread pattern of FIG. 1 and the narrow block in the tread pattern of FIG. 3 in comparison.
  • FIGS. 3, 4 (a) and 4 (b) in the embodiment shown in FIG. 3, the wall surfaces on both sides in the tire circumferential direction of the wide block 7 a (wall surfaces extending in the tire width direction) with respect to the tire radial direction.
  • the inclination angle gradually increases toward the inner side in the tire width direction in the half portion of the tire width direction with the wide block 7a bounded by at least the tire equatorial plane CL existing in the center region C and the intermediate region M.
  • the wide block 7a has a curvature at the bottom of the wall surface on both sides in the tire circumferential direction of the wide block 7a in the tire circumferential cross section. 7a is gradually increased toward the inner side in the tire width direction in the tire width direction half portion bordering on the tire equatorial plane CL existing in at least the center region C and the intermediate region M.
  • tires on the wall surfaces (wall surfaces extending in the tire width direction) on both sides in the tire circumferential direction of the narrow block 7 b The inclination angle with respect to the radial direction gradually increases toward the inner side in the tire width direction.
  • the bottoms of the wall surfaces on both sides in the tire circumferential direction of the narrow block 7b have a curvature, and the curvature radius R of the bottom increases gradually toward the inside in the tire width direction. Yes.
  • the rigidity of the wide block 7a and the narrow block 7b can be secured on the tire equatorial plane side where the input from the road surface is large, and the durability of the block can be further improved.
  • the inclination angle of at least one of the wall surfaces of the wide block 7a in the tire circumferential direction with respect to the tire radial direction is the tire equator where the wide block 7a exists at least in the center region C and the intermediate region M. It is preferable that the tire width gradually increases as it goes inward in the tire width direction at the half portion in the tire width direction with the surface CL as a boundary.
  • the inclination angle is varied by 5 to 25 ° between the outer end in the tire width direction and the inner end in the tire width direction in the tire width direction half of the wall surface in the tire circumferential direction of the wide block 7a.
  • the bottom of at least one wall surface of the wide block 7a in the tire circumferential direction has a curvature, and the wide block 7a exists at least in the center region C and the intermediate region M.
  • the curvature radius R of the bottom is preferably gradually increased toward the inner side in the tire width direction.
  • the curvature radius R is different by 1 to 7 mm between the outer end in the tire width direction and the inner end in the tire width direction in the tire width direction half of the wall surface in the tire circumferential direction of the wide block 7a.
  • the inclination angle of at least one of the wall surfaces in the tire circumferential direction of the narrow block 7b with respect to the tire radial direction gradually increases toward the inner side in the tire width direction.
  • the inclination angle is preferably different by 5 to 20 ° between the outer end in the tire width direction and the inner end in the tire width direction of the wall surface in the tire circumferential direction of the narrow block 7b.
  • the bottom of at least one wall surface of the narrow block 7b in the tire circumferential direction has a curvature, and the curvature radius R of the bottom increases toward the inner side in the tire width direction.
  • the radius of curvature R is preferably different by 1 to 5 mm between the outer end in the tire width direction and the inner end in the tire width direction of the wall surface in the tire circumferential direction of the narrow block 7b.
  • Example 1 In order to confirm the effects of the present invention, the tires according to Invention Examples 1 to 11 and the tires according to Comparative Examples 1 to 5 were prototyped and tested to evaluate the performance of the tire. The specifications of each tire are shown in Table 1 below. As shown in FIGS. 1 and 2, each tire has a plurality of blocks 7 arranged on the tread tread surface 4a, and specifications not shown in Table 1 are common to the tires.
  • Example 2 Next, the block durability was evaluated regarding cracks generated in the block.
  • the evaluation method for block baldness is as follows, and the specifications of each tire are shown in Table 2 below. Regarding the inventive examples 12 to 16, the specifications not shown in Table 2 are the same as those of the inventive example 1.
  • ⁇ Crack generated in block The total number of cracks generated in the wide block and the narrow block of each tire when the vehicle equipped with each tire was run on a rough test course for a certain period of time was evaluated. The evaluation results indicate that the block has higher durability when the total number of cracks is smaller.
  • Invention Example 12 to Invention Example 16 each have a smaller total number of cracks generated in the block and higher durability of the block than Invention Example 1. Furthermore, it can be seen that Invention Examples 12 to 16 can exhibit traction performance and cornering grip performance superior to those of Comparative Example 1. In addition, the evaluation result of Invention Example 1 also shows that the durability of the block has no problem for provision to the market. Moreover, in Table 2, it shows by the relative value which set the evaluation result of Example 1 to 100. For convenience, the numerical values in Table 1 have been converted to 100 again for the traction performance and cornering grip performance in Table 2.
  • the pneumatic tire for motorcycles of the present invention is particularly effectively used as a pneumatic tire for motorcycles for traveling on rough terrain.

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

Abstract

La présente invention concerne un bandage pneumatique pour un véhicule automobile à deux roues présentant une pluralité de blocs disposés dans une surface de bande de roulement, des blocs larges qui sont plus longs dans le sens de la largeur du pneu que dans le sens de la circonférence du pneu sont formés dans au moins une zone centrale et des zones intermédiaires, des blocs étroits sont formés dans au moins les zones intermédiaires, et les expressions relationnelles suivantes s'appliquent : 1,5 ≤ W1/L1 ≤ 4,0 ···(A), 0,5 ≤ W2/L2 ≤ 1,5 ···(B), 0,3 ≤ S1M/S1 ≤ 0,6 ···(C), 0,5 ≤ S2M/S2 ≤ 1,0 ···(D).
PCT/JP2016/003208 2015-07-15 2016-07-05 Bandage pneumatique pour véhicule automobile à deux roues Ceased WO2017010061A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680041143.4A CN107848339B (zh) 2015-07-15 2016-07-05 机动两轮车用充气轮胎
US15/739,943 US10780744B2 (en) 2015-07-15 2016-07-05 Motorcycle pneumatic tire
EP16824047.1A EP3323636B1 (fr) 2015-07-15 2016-07-05 Bandage pneumatique pour véhicule automobile à deux roues

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-141464 2015-07-15
JP2015141464 2015-07-15
JP2016057513A JP6637804B2 (ja) 2015-07-15 2016-03-22 自動二輪車用空気入りタイヤ
JP2016-057513 2016-03-22

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WO2017010061A1 true WO2017010061A1 (fr) 2017-01-19

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PCT/JP2016/003208 Ceased WO2017010061A1 (fr) 2015-07-15 2016-07-05 Bandage pneumatique pour véhicule automobile à deux roues

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111670125A (zh) * 2018-02-02 2020-09-15 株式会社普利司通 机动二轮车用轮胎
CN115431679A (zh) * 2022-07-01 2022-12-06 厦门正新橡胶工业有限公司 一种充气轮胎的胎面花纹结构和充气轮胎

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619316A (ja) * 1984-06-22 1986-01-16 Sumitomo Rubber Ind Ltd 不整地走行用二輪車タイヤ
JPH01160710A (ja) * 1987-12-17 1989-06-23 Bridgestone Corp 不整地用空気入りタイヤ
US5088535A (en) * 1988-11-02 1992-02-18 Specialized Bicycle Components, Inc. Bicycle or motorcycle tire tread
JP2007112396A (ja) * 2005-10-24 2007-05-10 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007168651A (ja) * 2005-12-22 2007-07-05 Sumitomo Rubber Ind Ltd 不整地走行用空気入りタイヤ
JP2010163144A (ja) * 2009-01-19 2010-07-29 Bridgestone Corp 二輪車用タイヤ
JP2011000934A (ja) * 2009-06-17 2011-01-06 Sumitomo Rubber Ind Ltd 不整地走行用の空気入りタイヤ
JP2012046078A (ja) * 2010-08-26 2012-03-08 Sumitomo Rubber Ind Ltd 不整地走行用の自動二輪車用タイヤ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619316A (ja) * 1984-06-22 1986-01-16 Sumitomo Rubber Ind Ltd 不整地走行用二輪車タイヤ
JPH01160710A (ja) * 1987-12-17 1989-06-23 Bridgestone Corp 不整地用空気入りタイヤ
US5088535A (en) * 1988-11-02 1992-02-18 Specialized Bicycle Components, Inc. Bicycle or motorcycle tire tread
JP2007112396A (ja) * 2005-10-24 2007-05-10 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007168651A (ja) * 2005-12-22 2007-07-05 Sumitomo Rubber Ind Ltd 不整地走行用空気入りタイヤ
JP2010163144A (ja) * 2009-01-19 2010-07-29 Bridgestone Corp 二輪車用タイヤ
JP2011000934A (ja) * 2009-06-17 2011-01-06 Sumitomo Rubber Ind Ltd 不整地走行用の空気入りタイヤ
JP2012046078A (ja) * 2010-08-26 2012-03-08 Sumitomo Rubber Ind Ltd 不整地走行用の自動二輪車用タイヤ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111670125A (zh) * 2018-02-02 2020-09-15 株式会社普利司通 机动二轮车用轮胎
CN111670125B (zh) * 2018-02-02 2022-04-12 株式会社普利司通 机动二轮车用轮胎
CN115431679A (zh) * 2022-07-01 2022-12-06 厦门正新橡胶工业有限公司 一种充气轮胎的胎面花纹结构和充气轮胎
CN115431679B (zh) * 2022-07-01 2023-11-28 厦门正新橡胶工业有限公司 一种充气轮胎的胎面花纹结构和充气轮胎

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