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
  • B60C11/0318—Tread patterns irregular patterns with particular pitch sequence
• • 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
  • B60C11/0304—Asymmetric 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
  • B60C11/0306—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
  • B60C11/11—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
  • 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
• • 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
• • 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
  • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
  • B60C11/03—Tread patterns
  • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
  • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
  • B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface

Definitions

• a block is a raised element formed on the tread which is delimited by recesses or grooves and comprising side walls and a contact face intended to come into contact with the roadway during taxiing. The intersection of each side wall with the contact face forms an edge.
• a rib is a raised element formed on a tread, this element extending in the circumferential direction and running around the tire.
• a rib comprises two side walls and a contact face, the latter being intended to come into contact with the roadway during driving.
• radial direction means in this document a direction which is perpendicular to the axis of rotation of the tire (this direction corresponds to the direction of the thickness of the tread).
• circumferential direction means a direction which is tangent to any circle centered on the axis of rotation. This direction is perpendicular to both the axial direction and a radial direction.
• axially outwardly we mean a direction which is parallel to the axis of rotation of the tire and directed outwardly of the internal cavity of the tire.
• the present invention aims at obtaining a family of tread tire tread design intended to equip including a drive axle of a heavy vehicle, this tread pattern giving the tire both good performance in wear , in motricity and rolling noise.
• the subject of the invention is a tread for a tire intended for the equipment of a heavy goods vehicle, this tread comprising a running surface designed to come into contact with a road surface and to forming a contact region, said band comprising:
• a separating plane separating a sculpture part on one side of said plane and a sculpture part on the other side
• the circumferential grooves defining at least three intermediate rows formed of a plurality of blocks and two rows of edges located axially outside the intermediate rows.
• each block of the rows of blocks comprises a contact face forming a portion of the running surface, a front face and a rear face and two side faces, [0027] the front face and the rear face cutting the contact face according to a leading edge and a trailing edge respectively, the leading edge of a block entering the rolling contact before the ridge. leaking from the same block when the belt rolls in the direction of travel.
• This tread is characterized in that the design of its tread is designed so that the leading edges of all the blocks of the rows formed of blocks are inclined and offset relative to each other in the circumferential sense in an appropriate way so that:
• the distribution of the leading edges is such that in rolling, after a leading edge located on a first side with respect to the separating plane is in contact with the roadway, another edge of attack located on the second side with respect to the same plane then comes into contact with the roadway followed by an edge on the first side of the separator plane and so on. It is possible that there is a slight overlap - not more than 10% of the length of the largest edge, that is, a first edge is entered at 90% of its length in the contact when another edge on the other side of the separator plane begins to enter the contact too. Preferably, it is however desirable that the inputs of the edges are made successively without overlap.
• the average angle of each leading edge is at least equal to 10 degrees and at most equal to 25 degrees with the transverse direction.
• the tread according to the invention is such that the leading edges of the blocks located on a first side relative to the separator plane have an orientation of the same sign while on the second side relative to in the separator plane the leading edges are oriented so that they form a V with leading edges on the first side.
• the separator plane is axially offset from the median plane of the strip so as to have at least one row more on one side with respect to the other side.
• the tread according to the invention combines with any one of the preceding provisions the presence of an odd number of rows of blocks, this number being at least equal to five.
• the invention also relates to a tire provided with a tread as described above, this tire being intended to equip a drive axle of a heavy vehicle.
• Figure 1 shows a partial view of a tread of a tread according to a first embodiment of the invention
• Figure 2 shows a partial view of a tread of a tread according to a second embodiment of the invention.
• Figure 1 shows a first tread variant according to the invention.
• this Figure 1 we see a partial view of the tread surface of a tread provided with a tread pattern having six rows of blocks defining five circumferential rectilinear grooves.
• This sculpture design is directional that is to say that it imposes a preferred direction of rolling to achieve the expected performance.
• This running direction is indicated by an arrow R in this figure and may be indicated by any appropriate means on the tire provided with this tread.
• This band comprises four intermediate rows and axially on either side of the shoulder or edge rows.
• This band is divided into two halves of the same width by a median plane represented by its intersection with the plane of the figure by a line XX '.
• An axis YY 'perpendicular to the axis XX' represents the transverse direction or that corresponding to the axis of rotation of the tire provided with said strip.
• the tread comprises oblique grooves 21 opening in the circumferential grooves 11 to form with the latter a plurality of blocks 31.
• the sculpture design is almost symmetrical, the separator plane (marked by its SS 'trace) being coincident with the median plane (noted XX').
• This plane separates on its left three rows of blocks whose leading edges Ai and the trailing edges Fi make one same angle with respect to the transverse direction (this direction being here shown by the direction YY ') and on its right two rows of blocks whose leading and trailing edges are at the same second angle with respect to the transverse direction, this second angle being of sign opposite to the sign of the edges of the first side.
• the leading and trailing edges of the blocks located on either side of the separator plane form a kind of V-shaped pattern, this pattern pointing in the direction of travel indicated by the arrow R.
• the rows of blocks are numbered by the references N1 to N6 starting with the row NI situated on one side ("first side") with respect to the median plane and closest to it, then by the row N2. passing on the other side ("second side") of the median plane and returning to the first side for N3 and so on until N6, moving away from the median plane (all the even indices are thus on the second side with respect to the median plane and all the odd indices on the first side).
• the median plane XX ' corresponds to the separating plane of this sculpture drawing, since the separating plane distinguishes a first left-hand side of this plane on which the leading edges of all the blocks have an orientation. of the same sign and a second right side of this median plane XX 'on which the leading edges of all the blocks have an orientation of opposite sign to that of the first side.
• leading edges Ai are positioned to enter the contact in a staggered manner relative to each other and so that the leading edge of a block located on one side relative to the separator plane is followed in contact by a leading edge of a block located on the other side with respect to the same plane. This alternation is repeated all around the tire having such a tread.
• the leading edge A1 of a block of the row NI on the first side enters the contact followed by a leading edge A2 of a block of the row N2 located on the second side of the band with respect to the median plane (in this example the median plane merges with the separator plane).
• This leading edge A2 of a block of the row N2 is, once fully into the contact, followed by the entry of a leading edge A3 of a block of the row N3 located on the first side. of the tread with respect to the median plane then followed by a leading edge A4 of a block of the row N4, then by that A5 of a block of the row N5 and finally by that A6 of a block of row N6.
• the process of entering the contact of the leading edges Ai resumes with a leading edge A1 of a block of the row NI and so on.
• the volumes of the transverse grooves delimited by the leading edges and trailing edges vis-à-vis are such that they enter successively and slightly offset in the contact which is particularly favorable for reduce noise while driving.
• the passage from one side to the other may be non-regular way, that is to say from NI to N4 and then to N3 and N6 then to N5 and finally to N2.
• a tread for a truck tire comprises a directional sculpture pattern, that is to say imposing a direction of travel (here indicated by an arrow R).
• This drawing is formed of four circumferential grooves 12 delimiting three intermediate rows NI, N2, N3 and two shoulder rows N4, N5.
• Each row comprises a plurality of obliquely oriented grooves 22 forming an equal angle in absolute value at 15 degrees with the direction YY '(transverse direction).
• These oblique grooves delimit on each row a plurality of blocks 32.
• the volumes of oblique grooves between two blocks of each row enter the contact in an off-set manner in the circumferential direction so as to further attenuate the input noise and exit from the region of contact with the roadway during taxiing.

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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (5)

Citations (2)

Family Cites Families (9)

• 2013
  • 2013-07-09 FR FR1356742A patent/FR3008352B1/fr active Active
• 2014
  • 2014-07-08 US US14/904,177 patent/US20160137004A1/en not_active Abandoned
  • 2014-07-08 CN CN201480039431.7A patent/CN105612065B/zh active Active
  • 2014-07-08 JP JP2016524800A patent/JP2016523766A/ja active Pending
  • 2014-07-08 EP EP14736832.8A patent/EP3019348B1/fr active Active
  • 2014-07-08 BR BR112015033028-2A patent/BR112015033028B1/pt active IP Right Grant
  • 2014-07-08 WO PCT/EP2014/064642 patent/WO2015004150A1/fr not_active Ceased

Patent Citations (2)

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