EP4164897A1 - Pneumatic vehicle tire for utility vehicles - Google Patents

Pneumatic vehicle tire for utility vehicles

Info

Publication number
EP4164897A1
EP4164897A1 EP21736969.3A EP21736969A EP4164897A1 EP 4164897 A1 EP4164897 A1 EP 4164897A1 EP 21736969 A EP21736969 A EP 21736969A EP 4164897 A1 EP4164897 A1 EP 4164897A1
Authority
EP
European Patent Office
Prior art keywords
steel
strand
layer
cord
belt
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.)
Pending
Application number
EP21736969.3A
Other languages
German (de)
French (fr)
Inventor
Tiago Moura
Florian BERGER
Fabian Wachmann
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.)
Continental Reifen Deutschland GmbH
Original Assignee
Continental Reifen Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Reifen Deutschland GmbH filed Critical Continental Reifen Deutschland GmbH
Publication of EP4164897A1 publication Critical patent/EP4164897A1/en
Pending legal-status Critical Current

Links

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 ⁇ .

Abstract

The invention relates to a utility vehicle tire with a radial design, in particular for trucks, buses, and truck trailers, having a four-ply or multi-ply belt (4) with a blocking ply (5), two working plies (6, 8), and a 0° ply (7), wherein steel cords (10) with at least two strands (11), each strand comprising at least six steel filaments (12), are arranged in the 0° ply (7), and by means of a twisting process, each strand has an identical first twist angle α and the steel cord has a second twist angle β. The invention is characterized in that the steel cord (10) of the 0° ply (7) has a 2 to 4 x n x d structure, where n = 6 to 8 and d = 0.15mm to 0.29mm, wherein the aforementioned structure signifies that the steel cord (10) has two to four strands (11) which are twisted together, each strand (10) contains six to eight steel filaments (12), each steel filaments (12) of the steel cord (10) has the same filament diameter (13), and the sum of the twist angle α of a strand (11) and the twist angle β of the steel cord ranges between 37° and 50°, preferably between 37° and 45°, particularly preferably between 38.5° and 42.5°, most preferably between 39.3° and 41.3°.

Description

Beschreibung description
Fahrzeugluftreifen für Nutzfahrzeuge Pneumatic vehicle tires for commercial vehicles
Die Erfindung betrifft einen Fahrzeugluftreifen für Nutzfahrzeuge in Radialbauart, insbesondere für Lastkraftwagen, Busse und Lastkraftwagenanhänger, welcher einen vier- oder mehrlagigen Gürtel mit einer Sperrlage, zwei Arbeitslagen und einer 0°-Lage aufweist, wobei in der 0°-Lage Stahlkorde mit wenigstens zwei Strängen mit je wenigstens 6 Stahlfilamenten angeordnet sind und wobei durch Verseilung jeder Strang einen gleichen ersten Verseilungswinkel a und der Stahlkord einen zweiten Verseilungswinkel ß aufweist. 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 α and the steel cord having a second stranding angle β due to stranding.
Stahlkorde für Verstärkungslagen von Fahrzeugreifen sind dem Fachmann hinreichend bekannt. Ein Stahlkord zeichnet sich im Allgemeinen dadurch aus, dass dieser wenigstens zwei Stahlfilamente aufweist, welche miteinander verdreht sind. Steel cords 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.
Gürtelkonstruktionen von Nutzfahrzeugreifen sind dem Fachmann ebenfalls hinreichend bekannt. Übliche Gürtelkonstruktionen von Nutzfahrzeugreifen ohne 0°-Lage weisen üblicherweise vier Gürtellagen auf, welche aus in Gummimischungen eingebetteten Stahlkorden bestehen. Die Gürtellagen werden üblicherweise von radial innen nach radial außen durchnummeriert. Die radial innerste Lage wird bei einem 4-Lagen-Gürtel als „1. Gürtellage“ oder nach ihrer Funktion als „Sperrlage“ bezeichnet. Radial außen auf dieser sind die 2. Gürtellage und die 3. Gürtellage in Funktion von sogenannten „Arbeitslagen“ angeordnet. Die radial äußere Arbeitslage wird von der 4. Gürtellage, der sogenannten „Abdecklage“ oder „Schutzlage“, abgedeckt, welche optional ist. 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. Belt ply ”or, according to their function, called“ blocked ply ”. 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.
Es ist ebenfalls bekannt, eine weitere Gürtellage vorzusehen, welche eine sogenannte „0°- Lage“ ist, deren Festigkeitsträger etwa in Umfangsrichtung des Reifens (+/- 5° in Bezug auf die Umfangsrichtung) verlaufen und welche üblicherweise entweder zwischen den Arbeitslagen oder zwischen der Sperrlage der ersten Arbeitslage angeordnet ist. Diese Ausbildung bewirkt eine größere Umfangssteifigkeit, wodurch die Beweglichkeit der Gürtelkanten reduziert und die Haltbarkeit positiv beeinflusst wird. It is also known to provide a further belt ply, which is a so-called “0 ° ply”, the reinforcements of which run approximately in the circumferential direction of the tire (+/- 5 ° in relation to the circumferential direction) and which usually either between the working layers or between the blocking layer of the first working layer is arranged. This Training causes greater circumferential stiffness, which reduces the mobility of the belt edges and has a positive effect on durability.
Die Stahlkorde der Sperrlage weisen in der Regel einen Winkel > 45° in Bezug auf die Umfangsrichtung auf und „sperren“ die Beweglichkeit der Arbeitslagen in lateraler Richtung. Die Stahlkorde der beiden Arbeitslagen weisen typischerweise einen gleichen Winkel zwischen 10° und 45° in Bezug auf die Reifenumfangsrichtung auf, wobei die Stahlkorde der einen Arbeitslage gegenläufig zu den Stahlkorden der anderen Arbeitslage in Bezug auf die Reifenumfangsrichtung geneigt sind. So sind die Stahlkorde der einen Arbeitslage kreuzend zu den Stahlkorden der anderen Arbeitslage angeordnet. Die Arbeitslagen übernehmen hohe Scher- und Zugkräfte, tragen die Hauptlast im Gürtel und sind daher für die Gürtelhaltbarkeit von besonderer Bedeutung. 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.
Die radial äußerste Gürtellage hat die Funktion einer Schutzlage für die beiden darunter liegenden Arbeitslagen, indem sie eine Barriere für Steine oder andere Gegenstände darstellt, die durch das Laufstreifenpaket dringen könnten. Die Festigkeitsträger weisen üblicherweise einen Winkel zwischen 15° und 30° in Bezug auf die Reifenumfangsrichtung auf. Die Schutzlage schützt die Arbeitslagen gegen Einschnitte von außen und insbesondere auch vor Korrosion. Dadurch werden die Haltbarkeit und Rundemeuerungsfähigkeit des Reifens erhöht. 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.
Es ist bekannt, in der 0°-Lage Stahlkorde beispielsweise der Konstruktion 3 x 7 x 0,22mm einzusetzen. Bei dieser Konstruktion sind drei Stränge mit je 7 Stahlfilamenten des Durchmessers 0,22 mm miteinander zu einem Stahlkord verdreht. Die 7 Stahlfilamente sind derart in jedem Strang angeordnet, dass 6 Lagenfilamente um 1 Kernfilament herum verdreht sind. Eine analoge Bezeichnung der Konstruktion ist 3 x (1+6) x 0,22mm. It is known to use steel cords, for example of the construction 3 x 7 x 0.22 mm, in the 0 ° position. In 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.
Ein solcher Kord ist besonders kompakt und stabil und wird heutzutage bereits in einer 0°- Lage oder der Schutzlage von NFZ-Reifen eingesetzt. Die Filamente eines Stranges sind derart dicht zueinander angeordnet, so dass dieser als „geschlossen“ bezeichnet wird und kein Gummi zwischen die Filamente des Kordes penetrieren kann. Für den im Betrieb befindlichen NFZ-Reifen in einer 0°-Lage, bei der die Festigkeitsträger etwa in Umfangsrichtung angeordnet sind, ist diese Kompaktheit und nur bei großen Kraftaufwand erreichbare gewisse Dehnung vorteilhaft, um die Reifenkontur gegen die Fliehkräfte und den Innendruck zu erhalten. 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. For commercial vehicle tires in operation in a 0 ° position, in which the reinforcements are arranged approximately in the circumferential direction, 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.
Es ist erwünscht, die Ermüdungsbeständigkeit des Kordes der 0°-Lage zu verbessern. It is desirable to improve the fatigue resistance of the 0 ° ply cord.
Der Erfindung liegt somit die Aufgabe zugrunde, einen Nutzfahrzeugreifen mit einem Stahlkord für eine 0°-Gürtellage der eingangs genannten Art derart auszuführen, dass dieser eine verbesserte Haltbarkeit aufweist. 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.
Gelöst wird die Aufgabe erfindungsgemäß dadurch, dass der Stahlkord der 0°-Lage die Konstruktion 2 bis 4 x n x d mit n = 6 bis 8 und mit d = 0,15mm bis 0,29mm aufweist, wobei diese Konstruktion bedeutet, dass der Stahlkord 2 bis 4 miteinander verdrehte Stränge aufweist, wobei jeder Strang 6 bis 8 Stahlfilamente enthält, dass jedes Stahlfilament des Stahlkordes den gleichen Filamentdurchmesser aufweist und dass die Summe aus dem Verseilungswinkels a eines Stranges und dem Verseilungswinkel ß des Stahlkordes zwischen 37° und 50°, bevorzugt zwischen 37° und 45°, besonders bevorzugt zwischen 38,5° und 42,5° und ganz besonders bevorzugt zwischen 39.3° und 41.3° liegt. The object is achieved according to the invention in that the steel cord of the 0 ° layer has the construction 2 to 4 xnxd with n = 6 to 8 and with d = 0.15mm to 0.29mm, this construction meaning that the steel cord 2 to Has 4 twisted strands, each strand containing 6 to 8 steel filaments, that each steel filament of the steel cord has the same filament diameter and that the sum of the twisting angle α of a strand and the twisting angle ß of the steel cord is between 37 ° and 50 °, preferably between 37 ° ° and 45 °, particularly preferably between 38.5 ° and 42.5 ° and very particularly preferably between 39.3 ° and 41.3 °.
Überraschenderweise hat sich gezeigt, dass Stahlkorde der vorgenannten Konstruktion und mit einer Summe aus dem Verseilungswinkels a eines Stranges und dem Verseilungswinkel ß des Kordes zwischen 37° und 50° besonders ermüdungsbeständig sind und daher eine verbesserte Haltbarkeit aufweisen. Surprisingly, it has been shown that steel cords of the aforementioned construction and with a sum of the twisting angle α of a strand and the twisting angle β of the cord between 37 ° and 50 ° are particularly fatigue-resistant and therefore have improved durability.
Dieser Vorteil hat sich insbesondere gezeigt, wenn die Summe aus dem Verseilungswinkels a eines Stranges und dem Verseilungswinkel ß des Kordes zwischen 37° und 45°, bevorzugt zwischen 38,5° und 42,5° und besonders bevorzugt zwischen 39.3° und 41.3° liegt. This advantage has been shown in particular when the sum of the twisting angle α of a strand and the twisting angle β of the cord is between 37 ° and 45 °, preferably between 38.5 ° and 42.5 ° and particularly preferably between 39.3 ° and 41.3 ° .
Der Verseilungswinkel a eines Stranges errechnet sich nach nachfolgender Formel: mit: The twisting angle a of a strand is calculated using the following formula: With:
Ls: Schlaglänge des Stranges, welche der axiale Abstand ist, welcher für eine 360°- Drehung eines Stahlfilamentes um die Längsachse des Stranges benötigt ist d: Durchmesser eines jeden Filamentes. 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.
Der Verseilungswinkel ß des Kordes errechnet sich nach nachfolgender Formel: mit The twisting angle ß of the cord is calculated using the following formula: With
Lc: Schlaglänge des Kordes, welche der axiale Abstand ist, welcher für eine 360°-Drehung eines Stranges um die Längsachse des Kordes benötigt ist d: Durchmesser eines jeden Filamentes m: Anzahl der Stränge im Kord. 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.
Jeder Verseilungswinkel a hat üblicherweise eine Fertigungstoleranz von bis zu +/- 0,5°. Each twisting angle a usually has a manufacturing tolerance of up to +/- 0.5 °.
Vorteilhaft ist es, wenn der Kord die Konstruktion 3 x 7 x d mit d = 0,20mm bis 0,24mm, besonders bevorzugt die Konstruktion 3 x 7 x 0,22mm aufweist und wenn die Summe aus dem Verseilungswinkels a eines Stranges und dem Verseilungswinkel ß des Kordes in einem Bereich von 39,3° bis 41,3° liegt, bevorzugt 40,3° beträgt, wobei jeder Strang einen Verseilungswinkel a in einem Bereich von 19° bis 20°, bevorzugt von 19,5° aufweist und der Kord einen Verseilungswinkel ß in einem Bereich von 20,3° bis 21,3°, bevorzugt von 20,8° aufweist. It is advantageous if the cord has the construction 3 x 7 xd with d = 0.20mm to 0.24mm, particularly preferably the construction 3 x 7 x 0.22mm and if the sum of the twisting angle α of a strand and the twisting angle β of the cord is in a range from 39.3 ° to 41.3 °, preferably 40.3 °, each strand having a twisting angle α in a range from 19 ° to 20 °, preferably 19.5 °, and the cord has a twisting angle β in a range from 20.3 ° to 21.3 °, preferably 20.8 °.
Die nachfolgende Tabelle zeigt ein bevorzugtes Ausführungsbeispiel eines Stahlkordes für die 0°-Lage eines erfindungsgemäßen Fahrzeugluftreifens gegenüber einem Stahlkord der Konstruktion 3x7x0,22 für die 0°-Lage eines Fahrzeugluftreifens des Standes der Technik. Tabelle 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. table
In einer Ausführungsform des Fahrzeugluftreifen für Nutzfahrzeuge mit einem 4-lagigen Gürtel, wobei in einer Reihenfolge von radial innen nach radial außen eine Sperrlage eine erste und eine zweite Arbeitslage angeordnet sind, ist es zweckmäßig, wenn die 0°-Lage entweder zwischen der Sperrlage und der ersten Arbeitslage oder bevorzugt zwischen der ersten Arbeitslage und der zweiten Arbeitslage angeordnet ist. In einer anderen Ausführungsform des Fahrzeugluftreifens für Nutzfahrzeuge mit einem 5- lagigen Gürtel, wobei in einer Reihenfolge von radial innen nach radial außen eine Sperrlage eine erste und eine zweite Arbeitslage und eine Schutzlage angeordnet sind, ist es zweckmäßig, wenn die 0°-Lage entweder zwischen der Sperrlage und der ersten Arbeitslage oder bevorzugt zwischen der ersten Arbeitslage und der zweiten Arbeitslage angeordnet ist. Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der schematischen Zeichnungen, welche ein Ausführungsbeispiel darstellen, näher beschrieben. Dabei zeigen die: In one embodiment of 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, it is useful if 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. In another embodiment of 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. Further features, advantages and details of the invention will now be described in more detail with reference to the schematic drawings which illustrate an exemplary embodiment. The show:
Fig. 1 einen Teilquerschnitt eines erfindungsgemäßen Nutzfahrzeugluftreifens im Gürtel und Laufstreifenbereich; 1 shows a partial cross-section of a commercial vehicle pneumatic tire according to the invention in the belt and tread area;
Fig. 2 einen Querschnitt durch einen Festigkeitsträger, welcher in der 0°-Lage des Nutzfahrzeugreifens der Fig. 1 angeordnet ist. FIG. 2 shows a cross section through a reinforcement which is arranged in the 0 ° position of the commercial vehicle tire of FIG. 1.
Die Fig. 1 zeigt einen Querschnitt durch den Laufstreifen- und Gürtelbereich eines erfindungsgemäßen Fahrzeugluftreifens für Nutzfahrzeuge, wie beispielsweise Lastkraftwagen, Busse oder Lastkraftwagenanhänger. Von den im gezeigten Bereich des Fahrzeugluftreifens üblicherweise vorhandenen Bauteilen sind ein profilierter Laufstreifen 1, eine Innenschicht 2, eine Karkasseinlage 3 und ein mehrlagiger Gürtel 4 dargestellt. Nicht dargestellt sind die üblicherweise zwischen den Randabschnitten der Gürtellagen, insbesondere im Bereich der Gürtellagenkanten, vorgesehenen Gürtelpolster und dergleichen. 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. Of the components usually present in the area of the pneumatic vehicle tire shown, 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.
Der Gürtel 4 weist fünf Gürtellagen 5, 6, 7, 8 und 9 auf, wobei die erste Gürtellage die radial innerste Gürtellage 5 und als Sperrlage ausgebildet ist. Die zweite Gürtellage 6 ist eine Arbeitslage, es folgt die 3. Gürtellage, welche als eine 0°-Lage 7 ausgeführt ist, oberhalb derer die vierte Gürtellage 8 als Arbeitslage angeordnet ist. An die vierte Gürtellage 8 schließt die radial äußerste Gürtellage 9, die Schutzlage, an. Sämtliche Gürtellagen 5, 6, 7, 8 und 9 bestehen aus in eine Gummimischung, der sogenannten Gürtelgummierung, eingebetteten Festigkeitsträgem, welche in jeder Lage parallel zueinander verlaufen. 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.
Die Festigkeitsträger in den Gürtellagen 5, 6, 7, 8 und 9 sind unter bestimmten Winkeln in Bezug auf die Umfangsrichtung geneigt. Die Festigkeitsträger verlaufen, beginnend bei der radial innersten Gürtellage 5, gemäß der Abfolge rechtssteigend - rechtssteigend - 0° - linkssteigend - linkssteigend. Unter einer 0°-Gürtellage 7 ist eine solche zu verstehen, in welcher die Festigkeitsträger zur Umfangsrichtung verlaufen und um höchsten ± 5° von der exakten 0°-Orientierung (= Reifenumfangsrichtung) abweichen. Der Winkel der Festigkeitsträger in der ersten Gürtellage 5 beträgt 45° bis 90°, insbesondere 48° bis 57°, der Winkel der Festigkeitsträger in der 0°-Gürtellage 7 beträgt 0° ± 5°, die Winkel der Festigkeitsträger in der zweiten und dritten Gürtellage (Arbeitslagen) 6, 8 betragen jeweils 10° bis 45° und der Winkel der Festigkeitsträger in der vierten Gürtellage 9 beträgt ebenfalls 10° bis 45°, jeweils in Bezug auf die Umfangsrichtung. Wie bereits erwähnt sind die zweite Gürtellage 6 und die dritte Gürtellage 8 Arbeitslagen, ihre Festigkeitsträger verlaufen daher unter relativ kleinen Winkeln zur Umfangsrichtung und die Steigung der Lagen ist entgegengesetzt. 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. A 0 ° belt ply 7 is to be understood as one in which the reinforcements run to the circumferential direction and deviate from the exact 0 ° orientation (= tire circumferential direction) by a maximum of ± 5 °. 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 ° and 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. As already mentioned, 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.
Der Festigkeitsträger 10 der Fig. 2 ist in der 0°-Gürtellage 7 des Gürtelbereiches des Nutzfahrzeugreifens der Fig. 1 angeordnet. Die Konstruktion lautet 3 x 7 x 0,22 mm, was bedeutet, dass dieser Stahlkord 10 drei miteinander verdrehte Stränge 11 aufweist, wobei jeder Strang 11 sieben Stahlfilamente 12 enthält. Die Stahlfilamente 12 sind in jedem Strang 11 derart angeordnet, dass ein Stahlfilament 12 als Kemfilament und die 6 weiteren Stahlfilamente 12 in einer ersten Lage um dieses Kemfilament hemm angeordnet sind. Eine andere Schreibweise der Konstruktion lautet 3 x (1 + 6) x 0,22mm. Dabei weist jedes Stahlfilament 12 des Stahlkordes 10 den gleichen Filamentdurchmesser 13 von 0,22mm auf. Jeder Strang 11 ist mit einem gleichen Verseilungswinkels a, mit a=19,5° und der Stahlkord 10 ist mit einem Verseilungswinkel ß, mit ß= 20,8° verseilt. Die Summe aus Verseilungswinkels a und Verseilungswinkel ß liegt zwischen 39,3° und 41,3° und beträgt hier 40,3°. Der Verseilungswinkels a ist kleiner als der Verseilungswinkel ß. Jeder Strang 11 als auch der Stahlkord 10 sind gleichsinnig verseilt, also jeder Strang 11 und der Stahlkord 10 sind in S- oder in Z-Richtung verdreht. Bezugsziffernliste 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. Each strand 11 is stranded with the same twisting angle α, with a = 19.5 ° and the steel cord 10 is stranded with a twisting angle β, with β = 20.8 °. The sum of the twisting angle α and twisting angle β is between 39.3 ° and 41.3 ° and is 40.3 ° here. The twisting angle α is smaller than the twisting angle β. Each strand 11 and the steel cord 10 are stranded in the same direction, so each strand 11 and the steel cord 10 are twisted in the S or in the Z direction. List of reference numerals
I . Laufstreifen 2. Innenschicht I. Tread 2nd inner layer
3 . Karkasseinlage 3. Carcass insert
4, . Gürtel 4,. belt
5 . Sperrlage 5. Barrier
6. Arbeitslage 7. 0°-Gürtellage 6. Working position 7. 0 ° belt position
8. Arbeitslage 8. Working situation
9. Schutzlage 9. Protective layer
10. Stahlkord 10. Steel cord
II . Strang 12. Stahlfilament II. Strand 12th steel filament
13 . Durchmesser des Stahlfilamentes (d) 13th Diameter of the steel filament (d)

Claims

Patentansprüche Claims
1. Fahrzeugluftreifen für Nutzfahrzeuge in Radialbauart, insbesondere für1. Pneumatic vehicle tires for commercial vehicles in radial design, in particular for
Lastkraftwagen, Busse und Lastkraftwagenanhänger, welcher einen vier- oder mehrlagigen Gürtel (4) mit einer Sperrlage (5), zwei Arbeitslagen (6, 8) und einer 0°-Lage (7) aufweist, wobei in der 0°-Lage (7) Stahlkorde (10) mit wenigstens zwei Strängen (11) mit je wenigstens 6 Stahlfilamenten (12) angeordnet sind und wobei durch Verseilung jeder Strang einen gleichen ersten Verseilungswinkel a und der Kord einen zweiten Verseilungswinkel ß aufweist, d a d u r c h g e k e n n z e i c h n e t, dass der Stahlkord (10) der 0°-Lage (7) die Konstruktion 2 bis 4 x n x d mit n = 6 bis 8 und mit d = 0,15mm bis 0,29mm aufweist, wobei diese Konstruktion bedeutet, dass der Stahlkord (10) 2 bis 4 miteinander verdrehte Stränge (11) aufweist, wobei jeder Strang (10) 6 bis 8 Stahlfilamente (12) enthält, dass jedes Stahlfilament (12) des Stahlkordes (10) den gleichen Filamentdurchmesser (13) aufweist und dass die Summe aus dem Verseilungswinkels a eines Stranges (11) und dem Verseilungswinkel ß des Stahlkord zwischen 37° und 50°, bevorzugt zwischen 37° und 45°, besonders bevorzugt zwischen 38,5° und 42,5° und ganz besonders bevorzugt zwischen 39.3° und 41.3° liegt. Trucks, buses and truck trailers which have a four- or multi-layer belt (4) with a blocking layer (5), two working layers (6, 8) and a 0 ° position (7), with the 0 ° position (7 ) Steel cords (10) are arranged with at least two strands (11) each with at least 6 steel filaments (12) and each strand has an identical first stranding angle α and the cord has a second stranding angle β, characterized in that the steel cord (10) the 0 ° position (7) has the construction 2 to 4 xnxd with n = 6 to 8 and with d = 0.15mm to 0.29mm, this construction meaning that the steel cord (10) has 2 to 4 twisted strands (11), each strand (10) containing 6 to 8 steel filaments (12), that each steel filament (12) of the steel cord (10) has the same filament diameter (13) and that the sum of the twisting angle α of a strand (11 ) and the twisting angle ß of the steel core ord is between 37 ° and 50 °, preferably between 37 ° and 45 °, particularly preferably between 38.5 ° and 42.5 ° and very particularly preferably between 39.3 ° and 41.3 °.
2. Fahrzeugluftreifen nach Anspruch 1, dadurch gekennzeichnet, dass der Stahlkord (10) die Konstruktion 3 x 7 x d mit d = 0,20mm bis 0,24mm aufweist, dass die Summe aus dem Verseilungswinkels a eines Stranges und dem Verseilungswinkel ß des Kordes in einem Bereich von 39,3° bis 41,3° liegt, bevorzugt 40,3° beträgt, wobei jeder Strang einen Verseilungswinkel a in einem Bereich von 19° bis 20°, bevorzugt von 19,5° aufweist und der Kord einen Verseilungswinkel ß in einem Bereich von 20,3° bis 21,3°, bevorzugt von 20,8° aufweist. 3. Fahrzeugluftreifen (10) nach Anspruch 2, dadurch gekennzeichnet, dass der Stahlkord (10) die Konstruktion 3 x 7 x d mit d = 0,22mm aufweist und dass die Summe des Verseilungswinkels a eines Stranges (11) und der Verseilungswinkel ß des Stahlkordes (10) 40,2. Pneumatic vehicle tire according to claim 1, characterized in that the steel cord (10) has the construction 3 x 7 xd with d = 0.20mm to 0.24mm, that the sum of the twisting angle α of a strand and the twisting angle ß of the cord in is in a range from 39.3 ° to 41.3 °, preferably 40.3 °, each strand having a twisting angle α in a range from 19 ° to 20 °, preferably 19.5 °, and the cord having a twisting angle β in a range from 20.3 ° to 21.3 °, preferably from 20.8 °. 3. Pneumatic vehicle tire (10) according to claim 2, characterized in that the steel cord (10) has the construction 3 x 7 xd with d = 0.22mm and that the sum of the twisting angle α of a strand (11) and the twisting angle ß of the steel cord (10) 40,
3° beträgt, wobei jeder Strang (11) einen Verseilungswinkel a von 19,5° und der Stahlkord (10) einen Verseilungswinkel ß von 20,8° aufweist. 3 °, each strand (11) having a twisting angle α of 19.5 ° and the steel cord (10) having a twisting angle β of 20.8 °.
4. Fahrzeugluftreifen (10) nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass jeder Strang (11) als auch der Stahlkord (10) gleichsinnig verseilt sind, also jeder Strang (11) und der Stahlkord (10) in S- oder in Z-Richtung verdreht ist. 4. Pneumatic vehicle tire (10) according to one or more of the preceding claims, characterized in that each strand (11) and the steel cord (10) are stranded in the same direction, i.e. each strand (11) and the steel cord (10) in S or is twisted in the Z direction.
5. Fahrzeugluftreifen nach einem oder mehreren der vorangehenden Ansprüche, mit einem 4-lagigen Gürtel (4), wobei in einer Reihenfolge von radial innen nach radial außen eine Sperrlage (5) eine erste und eine zweite Arbeitslage (6, 8) angeordnet sind, dadurch gekennzeichnet, dass die 0°-Lage (7), entweder zwischen der Sperrlage (5) und der ersten Arbeitslage (6) oder bevorzugt zwischen der ersten Arbeitslage (6) und der zweiten Arbeitslage (8) angeordnet ist. 5. Pneumatic vehicle tire according to one or more of the preceding claims, with a 4-layer belt (4), wherein a blocking layer (5), a first and a second working layer (6, 8) are arranged in a sequence from radially inside to radially outside, characterized in that the 0 ° position (7) is arranged either between the blocking layer (5) and the first working position (6) or preferably between the first working position (6) and the second working position (8).
6. Fahrzeugluftreifen nach einem oder mehreren der vorangehenden Ansprüche 1 bis 4, mit einem 5-lagiger Gürtel (4), wobei in einer Reihenfolge von radial innen nach radial außen eine Sperrlage (5) eine erste und eine zweite Arbeitslage (6, 8) und eine Schutzlage (9) angeordnet sind, dadurch gekennzeichnet, dass die 0°-Lage (7), entweder zwischen der Sperrlage (5) und der ersten Arbeitslage (6) oder bevorzugt zwischen der ersten Arbeitslage (6) und der zweiten Arbeitslage (8) angeordnet ist. 6. Pneumatic vehicle tire according to one or more of the preceding claims 1 to 4, with a 5-layer belt (4), wherein in a sequence from radially inside to radially outside a blocking layer (5), a first and a second working layer (6, 8) and a protective layer (9) are arranged, characterized in that the 0 ° position (7), either between the blocking layer (5) and the first working position (6) or preferably between the first working position (6) and the second working position ( 8) is arranged.
EP21736969.3A 2020-06-10 2021-06-09 Pneumatic vehicle tire for utility vehicles Pending EP4164897A1 (en)

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DE102020207242.6A DE102020207242A1 (en) 2020-06-10 2020-06-10 Pneumatic vehicle tires for commercial vehicles
PCT/DE2021/200079 WO2021249596A1 (en) 2020-06-10 2021-06-09 Pneumatic vehicle tire for utility vehicles

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EP (1) EP4164897A1 (en)
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FR2473426A1 (en) * 1979-12-06 1981-07-17 Dunlop Ltd PNEUMATIC HAVING A REINFORCING BELT, IN PARTICULAR FOR HEAVY WEIGHT
US6315019B1 (en) * 1998-02-19 2001-11-13 Pirelli Pneumatici S.P.A. Tire with belt structure including a pair of lateral bands
JP2012522903A (en) * 2009-04-03 2012-09-27 ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム Highly stretched steel cord composed of pre-formed strands
JP6206154B2 (en) * 2013-12-16 2017-10-04 横浜ゴム株式会社 Steel cord and pneumatic tire for construction vehicles using the same
DE102014208728A1 (en) * 2014-05-09 2015-11-12 Continental Reifen Deutschland Gmbh Vehicle tires

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