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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
  • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
  • B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
  • B60C9/2006—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords consisting of steel cord plies only
• • 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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
• • 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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
  • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
  • B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
  • D07B1/0606—Reinforcing cords for rubber or plastic articles
  • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
  • D07B1/0606—Reinforcing cords for rubber or plastic articles
  • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
• • 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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
  • B60C2009/0092—Twist structure
• • 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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
  • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
  • B60C2009/2074—Physical properties or dimension of the belt cord
  • B60C2009/2077—Diameters of the cords; Linear density thereof
• • 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
  • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
  • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
  • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
  • B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
  • B60C2009/2252—Physical properties or dimension of the zero degree ply cords
  • B60C2009/2285—Twist structures
• • 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
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2201/00—Ropes or cables
  • D07B2201/10—Rope or cable structures
  • D07B2201/1028—Rope or cable structures characterised by the number of strands
  • D07B2201/1032—Rope or cable structures characterised by the number of strands three to eight strands respectively forming a single layer
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2201/00—Ropes or cables
  • D07B2201/10—Rope or cable structures
  • D07B2201/104—Rope or cable structures twisted
  • D07B2201/1044—Rope or cable structures twisted characterised by a value or range of the pitch parameter given
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2201/00—Ropes or cables
  • D07B2201/10—Rope or cable structures
  • D07B2201/104—Rope or cable structures twisted
  • D07B2201/1064—Rope or cable structures twisted characterised by lay direction of the strand compared to the lay direction of the wires in the strand
  • D07B2201/1068—Rope or cable structures twisted characterised by lay direction of the strand compared to the lay direction of the wires in the strand having the same lay direction
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2201/00—Ropes or cables
  • D07B2201/20—Rope or cable components
  • D07B2201/2001—Wires or filaments
  • D07B2201/2009—Wires or filaments characterised by the materials used
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2201/00—Ropes or cables
  • D07B2201/20—Rope or cable components
  • D07B2201/2015—Strands
  • D07B2201/2024—Strands twisted
  • D07B2201/2025—Strands twisted characterised by a value or range of the pitch parameter given
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2205/00—Rope or cable materials
  • D07B2205/30—Inorganic materials
  • D07B2205/3021—Metals
  • D07B2205/3025—Steel
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2501/00—Application field
  • D07B2501/20—Application field related to ropes or cables
  • D07B2501/2046—Tire cords

Definitions

• the invention relates to a pneumatic vehicle tire for commercial vehicles of radial design, in particular for trucks, buses and truck trailers, which has a four- or multi-layer belt with a blocking layer, two working layers and a 0 ° layer, with steel cords with at least two in the 0 ° layer Strands with at least 6 steel filaments each are arranged and with each strand having an identical first stranding angle ⁇ and the steel cord having a second stranding angle ⁇ due to stranding.
• a steel cord for reinforcement plies of vehicle tires are well known to those skilled in the art.
• a steel cord is generally characterized in that it has at least two steel filaments which are twisted with one another.
• Belt constructions for commercial vehicle tires are also well known to those skilled in the art.
• Conventional belt constructions of commercial vehicle tires without a 0 ° layer usually have four belt layers, which consist of steel cords embedded in rubber compounds.
• the belt layers are usually numbered from the radial inside to the radial outside.
• the radially innermost layer in a 4-layer belt is called “1.
• the 2nd belt layer and the 3rd belt layer are arranged radially on the outside of this as a function of so-called “work layers”.
• the radially outer working layer is covered by the 4th belt layer, the so-called “cover layer” or "protective layer”, which is optional.
• the steel cords of the barrier layer generally have an angle of> 45 ° in relation to the circumferential direction and “block” the mobility of the working layers in the lateral direction.
• the steel cords of the two working layers typically have an equal angle between 10 ° and 45 ° with respect to the tire circumferential direction, the steel cords of one working layer being inclined in the opposite direction to the steel cords of the other working layer with respect to the tire circumferential direction. So the steel cords of one working layer are arranged to cross the steel cords of the other working layer.
• the work layers take on high shear and tensile forces, carry the main load in the belt and are therefore of particular importance for the durability of the belt.
• the radially outermost belt layer has the function of a protective layer for the two working layers below, in that it represents a barrier for stones or other objects that could penetrate through the tread packet.
• the reinforcements usually have an angle between 15 ° and 30 ° with respect to the tire circumferential direction.
• the protective layer protects the working layers against cuts from the outside and, in particular, against corrosion. This increases the durability and retreadability of the tire.
• steel cords for example of the construction 3 x 7 x 0.22 mm, in the 0 ° position.
• this construction three strands with 7 steel filaments each with a diameter of 0.22 mm are twisted together to form a steel cord.
• the 7 steel filaments are arranged in each strand in such a way that 6 layer filaments are twisted around 1 core filament.
• An analogous designation for the construction is 3 x (1 + 6) x 0.22mm.
• Such a cord is particularly compact and stable and is nowadays already used in a 0 ° position or the protective layer of commercial vehicle tires.
• the filaments of a strand are arranged so close to one another that it is referred to as "closed” and no rubber can penetrate between the filaments of the cord.
• this is compactness and only with great effort achievable certain elongation advantageous in order to maintain the tire contour against the centrifugal forces and the internal pressure.
• the invention is therefore based on the object of designing a commercial vehicle tire with a steel cord for a 0 ° belt ply of the type mentioned in such a way that it has an improved durability.
• the twisting angle a of a strand is calculated using the following formula: With:
• Ls lay length of the strand, which is the axial distance required for a 360 ° rotation of a steel filament around the longitudinal axis of the strand.
• D diameter of each filament.
• the twisting angle ß of the cord is calculated using the following formula:
• Lc lay length of the cord, which is the axial distance required for a 360 ° rotation of a strand around the longitudinal axis of the cord d: diameter of each filament m: number of strands in the cord.
• Each twisting angle a usually has a manufacturing tolerance of up to +/- 0.5 °.
• the following table shows a preferred embodiment of a steel cord for the 0 ° position of a pneumatic vehicle tire according to the invention compared to a steel cord of the construction 3x7x0.22 for the 0 ° position of a prior art pneumatic vehicle tire.
• the pneumatic vehicle tire for commercial vehicles with a 4-layer belt with a blocking layer, a first and a second working layer being arranged in a sequence from radially inside to radially outside
• the 0 ° position is either between the blocking layer and the first working position or is preferably arranged between the first working position and the second working position.
• the pneumatic vehicle tire for commercial vehicles with a 5-layer belt with a blocking layer, a first and a second working layer and a protective layer being arranged in a sequence from radially inside to radially outside, it is useful if the 0 ° position is either is arranged between the blocking layer and the first working position or preferably between the first working position and the second working position.
• FIG. 1 shows a partial cross-section of a commercial vehicle pneumatic tire according to the invention in the belt and tread area
• FIG. 2 shows a cross section through a reinforcement which is arranged in the 0 ° position of the commercial vehicle tire of FIG. 1.
• Fig. 1 shows a cross section through the tread and belt area of a pneumatic vehicle tire according to the invention for utility vehicles, such as trucks, buses or truck trailers.
• a profiled tread 1 an inner layer 2, a carcass insert 3 and a multi-layer belt 4 are shown.
• the belt pads and the like usually provided between the edge sections of the belt layers, in particular in the region of the belt layer edges, are not shown.
• the belt 4 has five belt layers 5, 6, 7, 8 and 9, the first belt layer being the radially innermost belt layer 5 and designed as a blocking layer.
• the second belt layer 6 is a working layer, followed by the third belt layer, which is designed as a 0 ° layer 7, above which the fourth belt layer 8 is arranged as a working layer.
• the fourth belt layer 8 is followed by the radially outermost belt layer 9, the protective layer. All belt layers 5, 6, 7, 8 and 9 consist of strength supports embedded in a rubber mixture, the so-called belt rubber coating, which run parallel to one another in each layer.
• the reinforcements in the belt layers 5, 6, 7, 8 and 9 are inclined at certain angles with respect to the circumferential direction.
• the reinforcements run, starting with the radially innermost belt layer 5, according to the sequence right-handing - right-handing - 0 ° - left-handing - left-handing.
• the angle of the reinforcement in the first belt layer 5 is 45 ° to 90 °, in particular 48 ° to 57 °
• the angle of the reinforcement in the 0 ° belt layer 7 is 0 ° ⁇ 5 °
• the angle of the reinforcement in the second and third Belt ply (working layers) 6, 8 are each 10 ° to 45 °
• the angle of the reinforcement in the fourth belt ply 9 is also 10 ° to 45 °, in each case with respect to the circumferential direction.
• the second belt ply 6 and the third belt ply 8 are working layers, their reinforcements therefore run at relatively small angles to the circumferential direction and the slope of the layers is opposite.
• the reinforcement 10 of FIG. 2 is arranged in the 0 ° belt ply 7 of the belt area of the commercial vehicle tire of FIG. 1.
• the construction is 3 x 7 x 0.22 mm, which means that this steel cord 10 has three strands 11 twisted together, each strand 11 containing seven steel filaments 12.
• the steel filaments 12 are arranged in each strand 11 in such a way that one steel filament 12 is arranged as a core filament and the 6 further steel filaments 12 are arranged in a first layer around this core filament.
• Another way of writing the construction is 3 x (1 + 6) x 0.22mm.
• Each steel filament 12 of the steel cord 10 has the same filament diameter 13 of 0.22 mm.
• the sum of the twisting angle ⁇ and twisting angle ⁇ is between 39.3 ° and 41.3 ° and is 40.3 ° here.
• the twisting angle ⁇ is smaller than the twisting angle ⁇ .

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)
• Ropes Or Cables (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=76744575

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (5)

• 2020
  • 2020-06-10 DE DE102020207242.6A patent/DE102020207242A1/de active Pending
• 2021
  • 2021-06-09 WO PCT/DE2021/200079 patent/WO2021249596A1/de unknown
  • 2021-06-09 EP EP21736969.3A patent/EP4164897A1/de active Pending
  • 2021-06-09 CN CN202180040954.3A patent/CN115916552A/zh active Pending
  • 2021-06-09 US US18/001,467 patent/US20230234399A1/en active Pending
  • 2021-06-09 BR BR112022022783A patent/BR112022022783A2/pt unknown

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