CA2773444C - Tread profile of a vehicle tire - Google Patents
Tread profile of a vehicle tire Download PDFInfo
- Publication number
- CA2773444C CA2773444C CA2773444A CA2773444A CA2773444C CA 2773444 C CA2773444 C CA 2773444C CA 2773444 A CA2773444 A CA 2773444A CA 2773444 A CA2773444 A CA 2773444A CA 2773444 C CA2773444 C CA 2773444C
- Authority
- CA
- Canada
- Prior art keywords
- groove
- profile
- transverse
- extent
- profile block
- 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.)
- Active
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
- 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
-
- 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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C11/125—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern arranged at 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane
-
- 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
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention relates to a tread surface profile of a vehicle tire having two radially raised profile block elements (12, 13), adjacent in the axial direction A of the pneumatic vehicle tire, which are spaced apart from one another by a profile groove (6) and each delimited in the circumferential direction by a transverse or skewed groove (5) and having a groove bottom (16) of the profile groove (6) which is raised radially over the groove bottom (15) of the transverse or skewed groove (5), wherein an additional, narrow channel (27) is formed along the entire extension of the profile groove (6) in the groove bottom (16) having a channel depth tN measured in the radial direction R, which extends starting from the first transverse or skewed groove (5) to the second transverse or skewed groove (5), running diagonally through the profile groove (6) from the groove wall (19) of the profile groove (6) delimiting the second profile block element (13) up to the groove wall (18) of the profile groove (6) delimiting the first profile block element (12).
Description
2 Description Tread profile of a vehicle tire The invention relates to a tread profile of a vehicle tire, in particular of a vehicle pneumatic tire, having two profile block elements which are adjacent in the axial direction A of the vehicle pneumatic tire, are raised in the radial direction and are spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in the circumferential direction U, wherein the two profile block elements are bounded on each side in the circumferential direction by in each case a transverse groove or oblique groove, and the profile groove extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U of the vehicle tire, of the two profile block elements, wherein the circumferential rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of the second profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove.
Tread profiles with profile block elements which are arranged one behind the other in the circumferential direction of a vehicle tire and which are stiffened by web-shaped raised portions of the groove base which connect the two profile block elements permanently are known. As a result, in a punctiform manner in the circumferential direction the profile elements are stiffened in the circumferential direction of the tire.
The punctiform permanent stiffening promotes unequal abrasion. The permanent stiffening brings about an increase in the rolling resistance when the tire contact surface is passed through.
The invention is therefore based on the object of providing a tread profile of a vehicle tire, in particular of a vehicle pneumatic tire, having two profile block elements which are adjacent in the axial direction A of the vehicle pneumatic tire, are raised in the radial direction and are spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in the circumferential direction U, wherein the two profile block elements are bounded on each side in the circumferential direction by in each case a transverse groove or oblique groove, and the profile groove extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U of the vehicle tire, of the two profile block elements, wherein the circumferential rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of the second profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove, in which, given reduced rolling resistance, the adjacent
Tread profiles with profile block elements which are arranged one behind the other in the circumferential direction of a vehicle tire and which are stiffened by web-shaped raised portions of the groove base which connect the two profile block elements permanently are known. As a result, in a punctiform manner in the circumferential direction the profile elements are stiffened in the circumferential direction of the tire.
The punctiform permanent stiffening promotes unequal abrasion. The permanent stiffening brings about an increase in the rolling resistance when the tire contact surface is passed through.
The invention is therefore based on the object of providing a tread profile of a vehicle tire, in particular of a vehicle pneumatic tire, having two profile block elements which are adjacent in the axial direction A of the vehicle pneumatic tire, are raised in the radial direction and are spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in the circumferential direction U, wherein the two profile block elements are bounded on each side in the circumferential direction by in each case a transverse groove or oblique groove, and the profile groove extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U of the vehicle tire, of the two profile block elements, wherein the circumferential rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of the second profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove, in which, given reduced rolling resistance, the adjacent
- 3 -profile block elements which are separated from the profile groove are uniformly stiffened in a simple way and the block profile is supported uniformly in the case of flattening, and in which homogenized abrasion is therefore made possible when a strong force is transmitted in the circumferential direction and in the axial direction.
According to the invention, the object is achieved by forming a tread profile of a vehicle tire, in particular of a vehicle pneumatic tire, having two profile block elements which are adjacent in the axial direction A of the vehicle pneumatic tire, are raised in the radial direction and are spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in the circumferential direction U, wherein the two profile block elements are bounded on each side in the circumferential direction by in each case a transverse groove or oblique groove, and the profile groove extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U
of the vehicle tire, of the two profile block elements, wherein the circumferential rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of the second profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove, in which an
According to the invention, the object is achieved by forming a tread profile of a vehicle tire, in particular of a vehicle pneumatic tire, having two profile block elements which are adjacent in the axial direction A of the vehicle pneumatic tire, are raised in the radial direction and are spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in the circumferential direction U, wherein the two profile block elements are bounded on each side in the circumferential direction by in each case a transverse groove or oblique groove, and the profile groove extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U
of the vehicle tire, of the two profile block elements, wherein the circumferential rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of the second profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove, in which an
- 4 -additional narrow groove with a groove depth tN which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove as far as the second transverse groove or oblique groove, running diagonally through the profile groove from the groove wall, bounding the second profile block element, of the profile groove as far as the groove wall, bounding the first profile block element, of the profile groove.
As a result, within a profile groove which disconnects the two profile block elements from one another, the two adjacent profile block elements are each additionally supported in their area of extent which is weaker in terms of the degrees of circumferential rigidity. The groove brings about the necessary decoupling of the two profile block elements, with the result that they have the necessary mobility and the rolling resistance is reduced. The groove profile has the result that the raised groove base, which is formed between the groove and the first profile block element, supports the first profile block element in its area of extent which is weakened in terms of the circumferential rigidity, and the raised groove base, which is formed between the groove and the second profile block element, supports the second profile block element in its area of extent which is weakened in terms of the circumferential rigidity, wherein a continuous change in the supporting effect along the direction of extent of the groove is ensured at the two profile block elements. As a result, merely by means of only a single measure within one profile groove both adjacent profile block elements are homogenized in their circumferential rigidity with a fluent transition over the entire area of extent of the profile groove in a simple, space-saving way. Furthermore, in the case of a flattened tire, the profile of the additional groove
As a result, within a profile groove which disconnects the two profile block elements from one another, the two adjacent profile block elements are each additionally supported in their area of extent which is weaker in terms of the degrees of circumferential rigidity. The groove brings about the necessary decoupling of the two profile block elements, with the result that they have the necessary mobility and the rolling resistance is reduced. The groove profile has the result that the raised groove base, which is formed between the groove and the first profile block element, supports the first profile block element in its area of extent which is weakened in terms of the circumferential rigidity, and the raised groove base, which is formed between the groove and the second profile block element, supports the second profile block element in its area of extent which is weakened in terms of the circumferential rigidity, wherein a continuous change in the supporting effect along the direction of extent of the groove is ensured at the two profile block elements. As a result, merely by means of only a single measure within one profile groove both adjacent profile block elements are homogenized in their circumferential rigidity with a fluent transition over the entire area of extent of the profile groove in a simple, space-saving way. Furthermore, in the case of a flattened tire, the profile of the additional groove
- 5 -causes the two profile block elements to be supported one against the other in the circumferential direction and in the lateral direction over the entire area of extent of the profile groove when the tire contact surface is passed through. As a result, the force is transmitted in the circumferential direction and in the lateral direction between the two profile block elements over the entire longitudinal extent of the profile groove, as a result of which uniform loading occurs while load peaks are avoided. The block profile is supported uniformly over the entire area of extent of the adjacent profile block elements. The long available area of extent of the profile groove, which is used completely to transmit force between the profile block elements, permits increased transmission of force in the circumferential direction and in the lateral direction, and does this with homogenized abrasion and a reduced rolling resistance.
In one aspect, there is provided a tread profile of a vehicle pneumatic tire, having two profile block elements which are adjacent in an axial direction A of the vehicle pneumatic tire, the two profile block elements being raised in a radial direction R, and spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in a circumferential direction U, wherein the two profile block elements are bound in the circumferential direction U by a first transverse groove or oblique groove on a first side of the two profile block elements, and a second transverse groove or oblique groove on a second side of the two profile block elements, the profile groove extending from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the two profile block elements . =
- 5a -having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U
of the vehicle pneumatic tire, wherein the circumferential rigidity of a first one of the two profile block elements increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of a second one of the two profile block elements decreases, with a groove base of the profile groove which is raised in the radial direction R
compared to a groove base of the first or second transverse grooves or oblique grooves, wherein a narrow groove with a groove depth tN which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the narrow groove running diagonally through the profile groove from a first groove wall of the profile groove to a second groove wall of the profile groove, wherein the first groove wall is bound to the second profile block element and the second groove wall is bound to the first profile block element.
One embodiment of the tread profile is particularly advantageous, having a further profile block element which is adjacent to the first profile block element in the axial direction A of the vehicle pneumatic tire and is raised in the radial direction R, wherein the further profile block element and the first profile block element are spaced apart from one another by a further profile groove, wherein the first and second transverse grooves or oblique grooves also bind, in - 5b -their extension, the further profile block element in the circumferential direction U, wherein the further profile groove extends from the first transverse groove or oblique groove the second transverse groove or oblique groove, the further profile block element and the first profile block element having degrees of transverse rigidity, which are embodied in a changing fashion along the direction of extent of the further profile groove and measured in the axial direction A of the vehicle tire, wherein the transverse rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the transverse rigidity of the further profile block element decreases, with a groove base of the further profile groove which is raised in the radial direction R compared to the groove base of the first transverse groove or oblique groove, wherein an additional narrow groove with a groove depth tN
which is measured in the radial direction R is formed in the groove base of the further profile groove, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the additional narrow groove running diagonally through the further profile groove from a first groove wall of the further profile groove to a second groove wall of the further profile groove, wherein the first groove wall of the further profile groove is bound to the further profile block element and the second groove wall of the further profile groove is bound to the first profile block element.
One embodiment of the tread profile is particularly advantageous, having a further profile block element which is - 5c -adjacent to the first profile block element in the axial direction A of the vehicle pneumatic tire and is raised in the radial direction, which block elements are spaced apart from one another by a profile groove, wherein the two transverse/oblique grooves, which bound the first profile block element in the circumferential direction, also bound, in their extension, the further profile block element in each case in the circumferential direction, wherein the profile groove also extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of transverse rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the axial direction A of ________________________________________________________
In one aspect, there is provided a tread profile of a vehicle pneumatic tire, having two profile block elements which are adjacent in an axial direction A of the vehicle pneumatic tire, the two profile block elements being raised in a radial direction R, and spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in a circumferential direction U, wherein the two profile block elements are bound in the circumferential direction U by a first transverse groove or oblique groove on a first side of the two profile block elements, and a second transverse groove or oblique groove on a second side of the two profile block elements, the profile groove extending from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the two profile block elements . =
- 5a -having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U
of the vehicle pneumatic tire, wherein the circumferential rigidity of a first one of the two profile block elements increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of a second one of the two profile block elements decreases, with a groove base of the profile groove which is raised in the radial direction R
compared to a groove base of the first or second transverse grooves or oblique grooves, wherein a narrow groove with a groove depth tN which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the narrow groove running diagonally through the profile groove from a first groove wall of the profile groove to a second groove wall of the profile groove, wherein the first groove wall is bound to the second profile block element and the second groove wall is bound to the first profile block element.
One embodiment of the tread profile is particularly advantageous, having a further profile block element which is adjacent to the first profile block element in the axial direction A of the vehicle pneumatic tire and is raised in the radial direction R, wherein the further profile block element and the first profile block element are spaced apart from one another by a further profile groove, wherein the first and second transverse grooves or oblique grooves also bind, in - 5b -their extension, the further profile block element in the circumferential direction U, wherein the further profile groove extends from the first transverse groove or oblique groove the second transverse groove or oblique groove, the further profile block element and the first profile block element having degrees of transverse rigidity, which are embodied in a changing fashion along the direction of extent of the further profile groove and measured in the axial direction A of the vehicle tire, wherein the transverse rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the transverse rigidity of the further profile block element decreases, with a groove base of the further profile groove which is raised in the radial direction R compared to the groove base of the first transverse groove or oblique groove, wherein an additional narrow groove with a groove depth tN
which is measured in the radial direction R is formed in the groove base of the further profile groove, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the additional narrow groove running diagonally through the further profile groove from a first groove wall of the further profile groove to a second groove wall of the further profile groove, wherein the first groove wall of the further profile groove is bound to the further profile block element and the second groove wall of the further profile groove is bound to the first profile block element.
One embodiment of the tread profile is particularly advantageous, having a further profile block element which is - 5c -adjacent to the first profile block element in the axial direction A of the vehicle pneumatic tire and is raised in the radial direction, which block elements are spaced apart from one another by a profile groove, wherein the two transverse/oblique grooves, which bound the first profile block element in the circumferential direction, also bound, in their extension, the further profile block element in each case in the circumferential direction, wherein the profile groove also extends from the one transverse groove or oblique groove which bounds the two profile block elements to the other transverse groove or oblique groove which bounds the two profile block elements, having degrees of transverse rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the axial direction A of ________________________________________________________
- 6 -the vehicle tire, of the two profile block elements, wherein the transverse rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the transverse rigidity of the further profile block element decreases, with a groove base of the profile groove which is raised in the radial direction compared to the groove base of the transverse groove or oblique groove, wherein an additional narrow groove with a groove depth tN which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove as far as the second transverse groove or oblique groove, running diagonally through the profile groove from the groove wall, bounding the further profile block element, of the profile groove as far as the groove wall, bounding the first profile block element, of the profile groove. As a result, the transmission of lateral force of the vehicle tire can be additionally increased with a high degree of homogenization, and the handling properties can be improved with uniform abrasion.
One embodiment of a tread profile is particularly advantageous, wherein the direction of extent of the profile groove is formed with a larger directional component in the circumferential direction U than in the axial direction A. The greater degree of circumferential orientation of the oblique groove can permit improved lateral guidance on snow to be achieved.
One embodiment of a tread profile is particularly advantageous, wherein the groove base of the profile groove is formed with a groove depth tR which is constant along its extent in the direction of extent of the profile . .
One embodiment of a tread profile is particularly advantageous, wherein the direction of extent of the profile groove is formed with a larger directional component in the circumferential direction U than in the axial direction A. The greater degree of circumferential orientation of the oblique groove can permit improved lateral guidance on snow to be achieved.
One embodiment of a tread profile is particularly advantageous, wherein the groove base of the profile groove is formed with a groove depth tR which is constant along its extent in the direction of extent of the profile . .
- 7 -groove, wherein, in each cross section perpendicularly to the direction of extent of the profile groove, the groove depth tR
is in each case the maximum radial distance from the lateral surface which outwardly bounds the two profile block elements in the radial direction R of the tire and forms the road contact surface. As a result, the two profile block elements which are bounded by the profile groove can be additionally stiffened uniformly at their edge elements.
One embodiment of a tread profile is particularly advantageous, wherein the groove of the profile groove is formed with a larger width c measured along its extent transversely with respect to the direction of extent than the groove of the profile groove. Since during the flattening process the profile block elements have to make a larger relative movement in the center of the tire than in the tire shoulder, allowance can easily be made for this fact by making the groove wider in the tire center, which increases the mobility of these profile elements.
One embodiment of a tread profile is particularly advantageous, wherein along its extent the groove is formed with a width c which is measured transversely with respect to the direction of extent, where 0.4 mm 5_ c 1.5 mm. Adapted configuration of the width allows the necessary mobility of the profile block elements to be set with tire contours with different degrees of roundness. In the specified value range, the properties which are desired in the case of passenger car tires and van tires can be reliably optimized.
One embodiment of a tread profile is particularly advantageous,
is in each case the maximum radial distance from the lateral surface which outwardly bounds the two profile block elements in the radial direction R of the tire and forms the road contact surface. As a result, the two profile block elements which are bounded by the profile groove can be additionally stiffened uniformly at their edge elements.
One embodiment of a tread profile is particularly advantageous, wherein the groove of the profile groove is formed with a larger width c measured along its extent transversely with respect to the direction of extent than the groove of the profile groove. Since during the flattening process the profile block elements have to make a larger relative movement in the center of the tire than in the tire shoulder, allowance can easily be made for this fact by making the groove wider in the tire center, which increases the mobility of these profile elements.
One embodiment of a tread profile is particularly advantageous, wherein along its extent the groove is formed with a width c which is measured transversely with respect to the direction of extent, where 0.4 mm 5_ c 1.5 mm. Adapted configuration of the width allows the necessary mobility of the profile block elements to be set with tire contours with different degrees of roundness. In the specified value range, the properties which are desired in the case of passenger car tires and van tires can be reliably optimized.
One embodiment of a tread profile is particularly advantageous,
- 8 -wherein the width c of the groove is a constant value along its extent. The relative movements of the profile block elements during the flattening process are virtually the same at the start of the grooves to those at their end. As a result, an optimum supporting effect of the profile block elements can be easily achieved by means of a constant width c of the separating groove.
The invention is explained in more detail below on the basis of the exemplary embodiments illustrated in figures 1 to 7, in which:
Fig. 1 shows a circumferential section of a tread profile of a vehicle pneumatic tire for passenger cars (Pkw) with winter properties in a plan view, wherein only the axial area of extent between a tire shoulder and the equator plane is represented for the sake of simplification, Fig. 2 shows a sectional illustration of a profile groove separating two profile block elements according to section II-II in fig. 1, Fig. 3 shows a sectional illustration of the profile groove according to section in fig. 1, Fig. 4 shows a profile groove according to section IV-IV in fig. 1, Fig. 5 shows a sectional illustration of another profile groove separating two profile block elements according to section V-V in fig. 1, Fig. 6 shows a sectional illustration of the other profile groove according to section VI-VI in fig. 1, and
The invention is explained in more detail below on the basis of the exemplary embodiments illustrated in figures 1 to 7, in which:
Fig. 1 shows a circumferential section of a tread profile of a vehicle pneumatic tire for passenger cars (Pkw) with winter properties in a plan view, wherein only the axial area of extent between a tire shoulder and the equator plane is represented for the sake of simplification, Fig. 2 shows a sectional illustration of a profile groove separating two profile block elements according to section II-II in fig. 1, Fig. 3 shows a sectional illustration of the profile groove according to section in fig. 1, Fig. 4 shows a profile groove according to section IV-IV in fig. 1, Fig. 5 shows a sectional illustration of another profile groove separating two profile block elements according to section V-V in fig. 1, Fig. 6 shows a sectional illustration of the other profile groove according to section VI-VI in fig. 1, and
- 9 -Fig. 7 shows a profile groove according to section VII-VII in fig. 1.
Fig. 1 shows the tread profile of a vehicle pneumatic tire for passenger cars (Pkw) with winter properties, in which tread profile, for the sake of simplification, only one axial half is illustrated with a profile block row 1 which is formed in the region of the left-hand tire shoulder, a profile block row 2 which is arranged next to it in the axial direction A of the vehicle pneumatic tire, a profile block row 3 which is arranged next to the profile block row 1 in the axial direction A of the vehicle pneumatic tire and a further profile block row 24 which is arranged axially next to the profile block row 3 and extends as far as the tire equator plane. The profile block row 1 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is embodied in a known fashion from a multiplicity of profile block elements 11 which are arranged one behind the other in the circumferential direction U and are each spaced apart from one another by a transverse groove 5. The profile block row 2 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is formed in a known fashion from a multiplicity of profile block elements 12 which are arranged distributed over the circumference in the circumferential direction U of the vehicle pneumatic tire and are each spaced apart from one another by one of the transverse grooves 5. The profile block row 3 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is formed in a known fashion from a multiplicity of profile block elements 13 which are arranged distributed over the circumference in the circumferential direction U of the vehicle pneumatic tire and are each spaced apart from one another by one
Fig. 1 shows the tread profile of a vehicle pneumatic tire for passenger cars (Pkw) with winter properties, in which tread profile, for the sake of simplification, only one axial half is illustrated with a profile block row 1 which is formed in the region of the left-hand tire shoulder, a profile block row 2 which is arranged next to it in the axial direction A of the vehicle pneumatic tire, a profile block row 3 which is arranged next to the profile block row 1 in the axial direction A of the vehicle pneumatic tire and a further profile block row 24 which is arranged axially next to the profile block row 3 and extends as far as the tire equator plane. The profile block row 1 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is embodied in a known fashion from a multiplicity of profile block elements 11 which are arranged one behind the other in the circumferential direction U and are each spaced apart from one another by a transverse groove 5. The profile block row 2 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is formed in a known fashion from a multiplicity of profile block elements 12 which are arranged distributed over the circumference in the circumferential direction U of the vehicle pneumatic tire and are each spaced apart from one another by one of the transverse grooves 5. The profile block row 3 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is formed in a known fashion from a multiplicity of profile block elements 13 which are arranged distributed over the circumference in the circumferential direction U of the vehicle pneumatic tire and are each spaced apart from one another by one
- 10 -of the transverse grooves 5. The profile block row 24 extends in the circumferential direction U over the entire circumference of the vehicle pneumatic tire and is formed in a known fashion from a multiplicity of profile block elements 20 which are arranged distributed over the circumference in the circumferential direction U of the vehicle pneumatic tire and are each spaced apart from one another by one of the transverse grooves 14.
The profile block row 3 and the profile block row 24 are spaced apart from one another in the axial direction A of the vehicle pneumatic tire by a circumferential groove 4 which is oriented in the circumferential direction U, runs in a zig-zag shape and extends over the entire circumference of the vehicle pneumatic tire. The profile block elements 11 of the profile block row 1 and profile block elements 12 of the profile block row 2, each arranged adjacent to one another in the axial direction A between two transverse grooves 5 which are adjacent in the circumferential direction U, are each arranged separated from one another in the axial direction A by a circumferential groove 7 oriented with a direction of extent with a larger directional component in the circumferential direction than in the axial direction -for example by a circumferential groove 7 which is oriented obliquely with respect to the circumferential direction with inclusion of an angle of approximately 20 with respect to the circumferential direction. The profile block elements 12 of the profile block row 2 and profile block elements 13 of the profile block row 3 which are each arranged adjacent to one another in the axial direction A between two transverse grooves 5 which are adjacent in the circumferential direction U
are each arranged separated from one another in the axial direction A by a circumferential groove 6 oriented with a direction of extent with a larger
The profile block row 3 and the profile block row 24 are spaced apart from one another in the axial direction A of the vehicle pneumatic tire by a circumferential groove 4 which is oriented in the circumferential direction U, runs in a zig-zag shape and extends over the entire circumference of the vehicle pneumatic tire. The profile block elements 11 of the profile block row 1 and profile block elements 12 of the profile block row 2, each arranged adjacent to one another in the axial direction A between two transverse grooves 5 which are adjacent in the circumferential direction U, are each arranged separated from one another in the axial direction A by a circumferential groove 7 oriented with a direction of extent with a larger directional component in the circumferential direction than in the axial direction -for example by a circumferential groove 7 which is oriented obliquely with respect to the circumferential direction with inclusion of an angle of approximately 20 with respect to the circumferential direction. The profile block elements 12 of the profile block row 2 and profile block elements 13 of the profile block row 3 which are each arranged adjacent to one another in the axial direction A between two transverse grooves 5 which are adjacent in the circumferential direction U
are each arranged separated from one another in the axial direction A by a circumferential groove 6 oriented with a direction of extent with a larger
- 11 -directional component in the axial direction than in the circumferential direction, for example with a circumferential groove 6 which is orientated obliquely with respect to the circumferential direction while enclosing an angle of approximately 50 with respect to the circumferential direction.
The transverse grooves 5 run parallel to one another and extend from an axial position outside the ground contact surface TW while enclosing an angle of approximately 5 with respect to the axial direction A
with upwardly directed circumferential orientation in the illustration, linearly over the entire area of extent of the profile block row 1 with respect to a bending point. Starting from the bending point, the transverse grooves 5 in turn run through the profile block rows 2 and 3 while enclosing an angle of inclination of approximately 40 with respect to the axial direction A, and said transverse grooves 5 open into the circumferential groove 4 at a bending point of the zig-zag shape facing the profile block row 3.
This embodiment has the effect that the profile block elements 11 in the illustrated embodiment have, along the extent of the circumferential groove 7 with their section of extent pointing to the transverse groove 5 (illustrated at the bottom) adjoining the profile block element 11 in the circumferential direction in figure 1, a greater degree of transverse rigidity than in their section of extent pointing to the transverse groove 5 (respectively illustrated at the top) adjoining the profile block element 11 in the circumferential direction U, and that the profile block elements 12 have, along the extent of the circumferential groove 7 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 12 at the bottom in the circumferential direction U in figure 1, a smaller
The transverse grooves 5 run parallel to one another and extend from an axial position outside the ground contact surface TW while enclosing an angle of approximately 5 with respect to the axial direction A
with upwardly directed circumferential orientation in the illustration, linearly over the entire area of extent of the profile block row 1 with respect to a bending point. Starting from the bending point, the transverse grooves 5 in turn run through the profile block rows 2 and 3 while enclosing an angle of inclination of approximately 40 with respect to the axial direction A, and said transverse grooves 5 open into the circumferential groove 4 at a bending point of the zig-zag shape facing the profile block row 3.
This embodiment has the effect that the profile block elements 11 in the illustrated embodiment have, along the extent of the circumferential groove 7 with their section of extent pointing to the transverse groove 5 (illustrated at the bottom) adjoining the profile block element 11 in the circumferential direction in figure 1, a greater degree of transverse rigidity than in their section of extent pointing to the transverse groove 5 (respectively illustrated at the top) adjoining the profile block element 11 in the circumferential direction U, and that the profile block elements 12 have, along the extent of the circumferential groove 7 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 12 at the bottom in the circumferential direction U in figure 1, a smaller
- 12 -degree of transverse rigidity than in their section of extent which points to the transverse groove 5 which adjoins the profile block element 12 at the top in the circumferential direction U in figure 1.
Furthermore, in the illustrated embodiment, the profile block elements 12 have, along the extent of the circumferential groove 6 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 12 at the bottom in the circumferential direction in figure 1, a smaller degree of circumferential rigidity than in their section of extent which points to the transverse groove 5 which respectively adjoins the profile block element 12 at the top in the circumferential direction U, and the profile block elements 13 have, along the extent of the circumferential groove 6 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 13 at the bottom in the circumferential direction U in figure 1, a greater degree of circumferential rigidity than in the section of extent which points to the transverse groove 5 which adjoins the profile block element 13 at the top in the circumferential direction U in figure 1.
The profile block elements 11 are formed, on their radially outer lateral surface which forms the road contact surface, with parallel or virtually parallel fine snipes 21 which extend with their main profile of extent parallel or virtually parallel to the transverse grooves 5 from outside the axial extent TW of the ground contact surface as far as into the circumferential groove 7. The profile block elements 12 are formed on their radially outer lateral surface, forming the road contact surface, with parallel fine snips 22 which extend with their main profile of extent starting from the one transverse groove 5, bounding the profile block element 12, to the other transverse
Furthermore, in the illustrated embodiment, the profile block elements 12 have, along the extent of the circumferential groove 6 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 12 at the bottom in the circumferential direction in figure 1, a smaller degree of circumferential rigidity than in their section of extent which points to the transverse groove 5 which respectively adjoins the profile block element 12 at the top in the circumferential direction U, and the profile block elements 13 have, along the extent of the circumferential groove 6 with their section of extent which points to the transverse groove 5 which adjoins the profile block element 13 at the bottom in the circumferential direction U in figure 1, a greater degree of circumferential rigidity than in the section of extent which points to the transverse groove 5 which adjoins the profile block element 13 at the top in the circumferential direction U in figure 1.
The profile block elements 11 are formed, on their radially outer lateral surface which forms the road contact surface, with parallel or virtually parallel fine snipes 21 which extend with their main profile of extent parallel or virtually parallel to the transverse grooves 5 from outside the axial extent TW of the ground contact surface as far as into the circumferential groove 7. The profile block elements 12 are formed on their radially outer lateral surface, forming the road contact surface, with parallel fine snips 22 which extend with their main profile of extent starting from the one transverse groove 5, bounding the profile block element 12, to the other transverse
- 13 -groove 5, bounding the profile block element, essentially parallel to the circumferential groove 6 and at a distance e from one another. The profile block elements 13 are formed on their radially outer lateral face, forming the road contact surface, with parallel fine snipes 23 which extend with their main profile of extent starting from the one transverse groove 5, which bounds the profile block element 12, to the other transverse groove 5, which bounds the profile block element, essentially parallel and at a distance f from one another. In the profile block elements 20, fine snipes 24 are formed, oriented parallel to one another in their profile, and extend in the axial direction A
through the profile block elements 20.
As is apparent in figs. 1, 2, 3 and 4, the transverse grooves 5 are each bounded radially on the inside with a groove base 15 from which a groove wall respectively extends on both sides of the groove base 15 in the radially outer direction as far as the lateral surface which forms the radio contact surface, wherein the transverse groove 5 respectively bounds the profile block element 11, 12 and 13, arranged downstream of the transverse groove 5 in the circumferential direction U, in the orientation of the circumferential direction U
which is shown at the top in figure 1, with its groove wall which is arranged downstream of the groove base 15, and the groove wall which is arranged upstream of the groove base 15 respectively bounds the profile block element 11, 12 and 13 which is arranged upstream of the transverse groove 5. The transverse grooves 5 are formed with a groove depth TQ which specifies, in each cross-sectional plane perpendicularly with respect to the direction of extent of a transverse groove 5, the respective maximum radial extent between the radially outer lateral surface, which bounds the respective two adjoining profile block elements 11, 12 and 13, and the lowest point of the groove base 5.
through the profile block elements 20.
As is apparent in figs. 1, 2, 3 and 4, the transverse grooves 5 are each bounded radially on the inside with a groove base 15 from which a groove wall respectively extends on both sides of the groove base 15 in the radially outer direction as far as the lateral surface which forms the radio contact surface, wherein the transverse groove 5 respectively bounds the profile block element 11, 12 and 13, arranged downstream of the transverse groove 5 in the circumferential direction U, in the orientation of the circumferential direction U
which is shown at the top in figure 1, with its groove wall which is arranged downstream of the groove base 15, and the groove wall which is arranged upstream of the groove base 15 respectively bounds the profile block element 11, 12 and 13 which is arranged upstream of the transverse groove 5. The transverse grooves 5 are formed with a groove depth TQ which specifies, in each cross-sectional plane perpendicularly with respect to the direction of extent of a transverse groove 5, the respective maximum radial extent between the radially outer lateral surface, which bounds the respective two adjoining profile block elements 11, 12 and 13, and the lowest point of the groove base 5.
- 14 -Likewise, the circumferential grooves 7 are formed, over their entire area of extent in the circumferential direction U between two transverse grooves 5 which are arranged one behind the other, with a groove base 10 which extends in the direction of the circumferential groove 7 and bounds the circumferential groove 7 radially inward, and from which a groove wall 8 which bounds the profile block element 11 with respect to the circumferential groove 7 extends to the respective profile block element 11, and a groove wall 9 which bounds the profile block element 12 with respect to the circumferential groove 7 extends in the radially outward direction to the profile block element 12. The two groove walls 8 and 9 extend here from the groove base 10 in the radially outward direction as far as the lateral surface, forming the radially outer road contact surface, of the two profile block elements 11 and 12 which bound the circumferential groove 7. The circumferential groove 7 is formed here with a groove depth TR, wherein the groove depth TR specifies, in all cross-sectional planes perpendicularly with respect to the main direction of extent of the circumferential groove 7, in each case the radial distance between the lateral surface which bounds radially toward the outside the two profile block elements 11 and 12 which are separated from the circumferential groove 7, and forms the road contact surface, and the respective lowest point of the groove base 10.
The groove base 10 is, as is illustrated in figures 1 to 4, of linear and planar design in the lateral direction with respect to the direction of extent of the groove.
The circumferential groove 7 is formed with a groove width b which extends, in the illustrated exemplary embodiment, over the entire radial extent of the
The groove base 10 is, as is illustrated in figures 1 to 4, of linear and planar design in the lateral direction with respect to the direction of extent of the groove.
The circumferential groove 7 is formed with a groove width b which extends, in the illustrated exemplary embodiment, over the entire radial extent of the
- 15 -circumferential groove 7 with a constant width b. In the illustrated exemplary embodiment of figures 1 to 4, the groove walls 8 and 9 have, in the cross-sectional profiles perpendicularly to the direction of extent of the circumferential groove 7, inclination angles a and respectively inclination angles p with respect to the radial direction R, wherein in the illustrated embodiment for the inclination angle a of the groove wall 8 a = 0 is selected, and for the inclination angle p of the groove wall 9 p = 0 is selected.
The width b of the groove is selected as b = 3 mm in the illustrated exemplary embodiment.
In the groove base 10 of the circumferential groove 7, a groove 17 of the width cl is additionally formed, which groove 17 extends from transverse groove 5 to transverse groove 5 diagonally through the circumferential groove 7 in the direction of extent of the circumferential groove 7 along the entire extent of the circumferential groove 7. Starting from the junction of the circumferential groove 7 with the transverse groove 5 which is arranged upstream of the circumferential groove 7 and in which the groove 17 directly adjoins the profile block element 11 in a radial prolongation of the groove wall 8 and is formed at a distance an where a11>0 mm with respect to the groove wall 9, up to the junction of the circumferential groove 7 with the transverse groove 5 which is arranged downstream and in which the groove 17 directly adjoins the profile block element 12 in a radial prolongation of the groove wall 9 and is formed with a distance a12 where a12>0 mm with respect to the groove wall 8, the groove 17 extends along the extent of the circumferential groove 7 in a linear fashion and at the same time crosses the circumferential groove 7 over its entire width b.
The width b of the groove is selected as b = 3 mm in the illustrated exemplary embodiment.
In the groove base 10 of the circumferential groove 7, a groove 17 of the width cl is additionally formed, which groove 17 extends from transverse groove 5 to transverse groove 5 diagonally through the circumferential groove 7 in the direction of extent of the circumferential groove 7 along the entire extent of the circumferential groove 7. Starting from the junction of the circumferential groove 7 with the transverse groove 5 which is arranged upstream of the circumferential groove 7 and in which the groove 17 directly adjoins the profile block element 11 in a radial prolongation of the groove wall 8 and is formed at a distance an where a11>0 mm with respect to the groove wall 9, up to the junction of the circumferential groove 7 with the transverse groove 5 which is arranged downstream and in which the groove 17 directly adjoins the profile block element 12 in a radial prolongation of the groove wall 9 and is formed with a distance a12 where a12>0 mm with respect to the groove wall 8, the groove 17 extends along the extent of the circumferential groove 7 in a linear fashion and at the same time crosses the circumferential groove 7 over its entire width b.
- 16 -The groove 17 is respectively formed in the cross sections perpendicularly to the direction of extent of the groove 17 with a width cl which is constant over the entire radial extent of the groove 17 in the illustrated exemplary embodiment.
The groove 17 is formed here with a groove depth TN, wherein the groove depth TN in all the cross-sectional planes perpendicularly to the direction of main extent of the circumferential groove 7 respectively specifies the radial distance between the lateral surface, which bounds in the radially outward direction the two profile block elements 11 and 12 which are separated from the circumferential groove 7 and forms the road contact surface, and the respectively deepest point of the groove 17.
The width cl is selected as 0.4 mm cl 1.5 mm.
For the distance an, the following applies (a11+c1)=b, and for the distance a12 the following applies (a12-Fc1)=b, where ail 3c1 and a12 3c1, each measured in the groove base 10.
Likewise, the circumferential grooves 6 are formed, over their entire area of extent in the circumferential direction U between two transverse grooves 5 which are arranged one behind the other, with a groove base 16 which extends in the direction of the circumferential groove 6 and bounds the circumferential groove 6 in the radially inward direction, and from which a groove wall 18, which bounds the profile block element 12 with respect to the circumferential groove 6, extends to the respective profile block element 12, and a groove wall 19, which bounds the profile block element 13 with respect to the circumferential groove 6, extends in the radially outward direction to the profile block element 13. The two groove walls 18 and 19 extend here from the
The groove 17 is formed here with a groove depth TN, wherein the groove depth TN in all the cross-sectional planes perpendicularly to the direction of main extent of the circumferential groove 7 respectively specifies the radial distance between the lateral surface, which bounds in the radially outward direction the two profile block elements 11 and 12 which are separated from the circumferential groove 7 and forms the road contact surface, and the respectively deepest point of the groove 17.
The width cl is selected as 0.4 mm cl 1.5 mm.
For the distance an, the following applies (a11+c1)=b, and for the distance a12 the following applies (a12-Fc1)=b, where ail 3c1 and a12 3c1, each measured in the groove base 10.
Likewise, the circumferential grooves 6 are formed, over their entire area of extent in the circumferential direction U between two transverse grooves 5 which are arranged one behind the other, with a groove base 16 which extends in the direction of the circumferential groove 6 and bounds the circumferential groove 6 in the radially inward direction, and from which a groove wall 18, which bounds the profile block element 12 with respect to the circumferential groove 6, extends to the respective profile block element 12, and a groove wall 19, which bounds the profile block element 13 with respect to the circumferential groove 6, extends in the radially outward direction to the profile block element 13. The two groove walls 18 and 19 extend here from the
- 17 -groove base 16 radially outward as far as the lateral surface, forming the radially outer road contact surface, of the two profile block elements 12 and 13 which bound the circumferential groove 6. The circumferential groove 6 is formed here with a groove depth TR, wherein the groove depth TR specifies in all the cross-sectional planes perpendicularly to the direction of main extent of the circumferential groove 6 in each case the radial distance between the lateral surface, which bounds in the radially outward direction the two profile block elements 12 and 13 which are separated by the circumferential groove 6 and forms the road contact surface, and the respective deepest point of the groove base 16.
The groove base 16 is, as illustrated in figures 1, 5 to 7, formed in a linear and planar fashion transversely with respect to the direction of extent of the groove 6.
The circumferential groove 6 is formed with a groove width b which extends in the illustrated exemplary embodiment over the entire radial extent of the circumferential groove 7 with a constant width b. In the illustrated exemplary embodiment of figures 1, 5 to 7, the groove walls 18 and 19 have, in the cross-sectional profiles perpendicularly with respect to the direction of extent of the circumferential groove 6, inclination angles a and respectively inclination angles p with respect to the radial direction R, wherein in the illustrated embodiment, for the inclination angle a of the groove wall 8 a = 00 is selected, and for the inclination angle p of the groove wall 9 p = o is selected.
The width b of the groove is selected as b = 3 mm in the illustrated exemplary embodiment.
The groove base 16 is, as illustrated in figures 1, 5 to 7, formed in a linear and planar fashion transversely with respect to the direction of extent of the groove 6.
The circumferential groove 6 is formed with a groove width b which extends in the illustrated exemplary embodiment over the entire radial extent of the circumferential groove 7 with a constant width b. In the illustrated exemplary embodiment of figures 1, 5 to 7, the groove walls 18 and 19 have, in the cross-sectional profiles perpendicularly with respect to the direction of extent of the circumferential groove 6, inclination angles a and respectively inclination angles p with respect to the radial direction R, wherein in the illustrated embodiment, for the inclination angle a of the groove wall 8 a = 00 is selected, and for the inclination angle p of the groove wall 9 p = o is selected.
The width b of the groove is selected as b = 3 mm in the illustrated exemplary embodiment.
- 18 -In the groove base 16 of the circumferential groove 6, a groove 27 with the width c2 is additionally formed, which groove 27 extends running diagonally through the circumferential groove 6 in the direction of extent of the circumferential groove 6 along the entire extent of the circumferential groove 6 from transverse groove 5 to transverse groove 5. Starting from the junction of the circumferential groove 6 with the transverse groove 5 which is arranged upstream of the circumferential groove 6 and in which the groove 27 directly adjoins the profile block element 13 in a radial prolongation of the groove wall 19 and is formed with a distance a21 where a21 > 0 mm with respect to the groove wall 18, as far as the junction of the circumferential groove 6 with the downstream transverse groove 6 in which the groove 27 directly adjoins the profile block element 12 in a radial prolongation of the groove wall 18 and is formed with a distance a22 where a22 > 0 mm with respect to the groove wall 19, the groove 27 extends linearly along the extent of the circumferential groove 6 and in doing so crosses the circumferential groove 6 over its entire width b.
The groove 27 is respectively formed in the cross sections perpendicular to the direction of extent of the groove 27 with a width c2 which, in the illustrated exemplary embodiment, is constant over the entire radial extent of the groove 17.
The groove 27 is formed here with a groove depth TN, wherein the groove depth TN respectively specifies, in all the cross-sectional planes perpendicularly to the direction of main extent of the circumferential groove 6, the radial distance between the lateral surface, which bounds in the radially outward direction the two profile block elements 12 and 13 which are separated from the circumferential groove 6, and forms the road
The groove 27 is respectively formed in the cross sections perpendicular to the direction of extent of the groove 27 with a width c2 which, in the illustrated exemplary embodiment, is constant over the entire radial extent of the groove 17.
The groove 27 is formed here with a groove depth TN, wherein the groove depth TN respectively specifies, in all the cross-sectional planes perpendicularly to the direction of main extent of the circumferential groove 6, the radial distance between the lateral surface, which bounds in the radially outward direction the two profile block elements 12 and 13 which are separated from the circumferential groove 6, and forms the road
- 19 -contact surface, and the respective deepest point of the groove 27.
The width c2 is selected as 0.4 mm c2 1.5 mm.
For the distance a21 the following applies (a21 + c2) =
b, and for the distance a22 the following applies (a22 + 02) = b, where a21 3c2 and a22 302, each measured in the groove base 16.
In the illustrated exemplary embodiment, c2 > cl is selected. For example, c, = 0.7 mm and ci = 0.6 mm are selected.
The for the groove depth TN and the groove depth TR the following applies: TR < TN. For the groove depth TN and the depth of the groove depth TQ of the adjacent transverse grooves 5 in the junction area of the circumferential groove 6 and the circumferential groove 7 in the respective transverse groove 5 the following applies:
(0.1 TQ) TN (1.2 TQ).
For TQ the following applies: 8 mm TQ 10 MM.
For TR the following applies: (0.05 TQ) TR (0.95 TQ).
In the illustrated exemplary embodiment, TN < TQ.
In the illustrated exemplary embodiments, TN is formed with TN = (TQ - 3.5 mm).
In fig. 1 to fig. 7 an embodiment is illustrated where a = 0 and p = 0 . In another embodiment (not illustrated) a and p are selected to be greater than 0 , wherein a 15 and p 15 are selected.
The width c2 is selected as 0.4 mm c2 1.5 mm.
For the distance a21 the following applies (a21 + c2) =
b, and for the distance a22 the following applies (a22 + 02) = b, where a21 3c2 and a22 302, each measured in the groove base 16.
In the illustrated exemplary embodiment, c2 > cl is selected. For example, c, = 0.7 mm and ci = 0.6 mm are selected.
The for the groove depth TN and the groove depth TR the following applies: TR < TN. For the groove depth TN and the depth of the groove depth TQ of the adjacent transverse grooves 5 in the junction area of the circumferential groove 6 and the circumferential groove 7 in the respective transverse groove 5 the following applies:
(0.1 TQ) TN (1.2 TQ).
For TQ the following applies: 8 mm TQ 10 MM.
For TR the following applies: (0.05 TQ) TR (0.95 TQ).
In the illustrated exemplary embodiment, TN < TQ.
In the illustrated exemplary embodiments, TN is formed with TN = (TQ - 3.5 mm).
In fig. 1 to fig. 7 an embodiment is illustrated where a = 0 and p = 0 . In another embodiment (not illustrated) a and p are selected to be greater than 0 , wherein a 15 and p 15 are selected.
- 20 -In an alternative embodiment (not illustrated), the inclination angle a which is selected to be larger than the inclination angle p so that the width of the circumferential groove 7 or 6 increases in the radially outward direction starting from the width b in the groove base 10 or 16.
In the illustrated figures and the associated description above, the circumferential groove 6 and the circumferential groove 7 are each formed with a constant width b.
In an alternative embodiment (not illustrated), the circumferential groove 6 is formed with a different width b from that of the circumferential groove 7.
In another embodiment (not illustrated), the width b of the circumferential groove 6 is formed with a width which increases continuously along its extent. In another embodiment (not illustrated), the circumferential groove ' is formed with a width which increases continuously along its extent.
In an alternative embodiment, the depth TN of the groove 17 or groove 27 is respectively made constant over the entire extent of the groove 17 or 27. In another embodiment (not illustrated), the groove 17 is formed with a depth TN which changes over the length of the extent of the groove 17. In another exemplary embodiment, the depth of the groove 27 is formed with a depth TN which changes along the extent of the groove 27.
As illustrated in fig. 1, the distance between the circumferential groove 6 and the fine snipe 23, closest to the circumferential groove 6, of the profile block element 12 which is bounded by the circumferential groove 6 is larger than the distance e, and the
In the illustrated figures and the associated description above, the circumferential groove 6 and the circumferential groove 7 are each formed with a constant width b.
In an alternative embodiment (not illustrated), the circumferential groove 6 is formed with a different width b from that of the circumferential groove 7.
In another embodiment (not illustrated), the width b of the circumferential groove 6 is formed with a width which increases continuously along its extent. In another embodiment (not illustrated), the circumferential groove ' is formed with a width which increases continuously along its extent.
In an alternative embodiment, the depth TN of the groove 17 or groove 27 is respectively made constant over the entire extent of the groove 17 or 27. In another embodiment (not illustrated), the groove 17 is formed with a depth TN which changes over the length of the extent of the groove 17. In another exemplary embodiment, the depth of the groove 27 is formed with a depth TN which changes along the extent of the groove 27.
As illustrated in fig. 1, the distance between the circumferential groove 6 and the fine snipe 23, closest to the circumferential groove 6, of the profile block element 12 which is bounded by the circumferential groove 6 is larger than the distance e, and the
- 21 -distance between the circumferential groove 6 and the fine snipe 23, closest to the circumferential groove 6, of the profile block element 13 is larger than the distance f.
=
=
- 22 -List of Reference Numbers (Part of the Description) 1 Profile block row 2 Profile block row 3 Profile block row 4 Circumferential groove Transverse groove 6 Oblique groove 7 Circumferential groove 8 Groove wall 9 Groove wall Groove base 11 Profile block element 12 Profile block element 13 Profile block element 14 Transverse groove Groove base 16 Groove base 17 Groove 18 Groove wall 19 Groove wall Profile block element 21 Fine snipe 22 Fine snipe
23 Fine snipe
24 Fine snipe 27 Groove
Claims (8)
1) A
tread profile of a vehicle pneumatic tire, having two profile block elements which are adjacent in an axial direction A of the vehicle pneumatic tire, the two profile block elements being raised in a radial direction R, and spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in a circumferential direction U, wherein the two profile block elements are bound in the circumferential direction U by a first transverse groove or oblique groove on a first side of the two profile block elements, and a second transverse groove or oblique groove on a second side of the two profile block elements, the profile groove extending from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the two profile block elements having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U of the vehicle pneumatic tire, wherein the circumferential rigidity of a first one of the two profile block elements increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of a second one of the two profile block elements decreases, with a groove base of the profile groove which is raised in the radial direction R compared to a groove base of the first or second transverse grooves or oblique grooves, wherein a narrow groove with a groove depth t N which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the narrow groove running diagonally through the profile groove from a first groove wall of the profile groove to a second groove wall of the profile groove, wherein the first groove wall is bound to the second profile block element and the second groove wall is bound to the first profile block element.
tread profile of a vehicle pneumatic tire, having two profile block elements which are adjacent in an axial direction A of the vehicle pneumatic tire, the two profile block elements being raised in a radial direction R, and spaced apart from one another by a profile groove whose direction of extent is formed with a larger directional component in the axial direction A than in a circumferential direction U, wherein the two profile block elements are bound in the circumferential direction U by a first transverse groove or oblique groove on a first side of the two profile block elements, and a second transverse groove or oblique groove on a second side of the two profile block elements, the profile groove extending from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the two profile block elements having degrees of circumferential rigidity, which are embodied in a changing fashion along the direction of extent of the profile groove and measured in the circumferential direction U of the vehicle pneumatic tire, wherein the circumferential rigidity of a first one of the two profile block elements increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the circumferential rigidity of a second one of the two profile block elements decreases, with a groove base of the profile groove which is raised in the radial direction R compared to a groove base of the first or second transverse grooves or oblique grooves, wherein a narrow groove with a groove depth t N which is measured in the radial direction R is formed in the groove base, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the narrow groove running diagonally through the profile groove from a first groove wall of the profile groove to a second groove wall of the profile groove, wherein the first groove wall is bound to the second profile block element and the second groove wall is bound to the first profile block element.
2) The tread profile of claim 1, having a further profile block element which is adjacent to the first profile block element in the axial direction A of the vehicle pneumatic tire and is raised in the radial direction R, wherein the further profile block element and the first profile block element are spaced apart from one another by a further profile groove, wherein the first and second transverse grooves or oblique grooves also bind, in their extension, the further profile block element in the circumferential direction U, wherein the further profile groove extends from the first transverse groove or oblique groove the second transverse groove or oblique groove, the further profile block element and the first profile block element having degrees of transverse rigidity, which are embodied in a changing fashion along the direction of extent of the further profile groove and measured in the axial direction A of the vehicle tire, wherein the transverse rigidity of the first profile block element increases starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, and the transverse rigidity of the further profile block element decreases, with a groove base of the further profile groove which is raised in the radial direction R compared to the groove base of the first transverse groove or oblique groove, wherein an additional narrow groove with a groove depth t N
which is measured in the radial direction R is formed in the groove base of the further profile groove, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the additional narrow groove running diagonally through the further profile groove from a first groove wall of the further profile groove to a second groove wall of the further profile groove, wherein the first groove wall of the further profile groove is bound to the further profile block element and the second groove wall of the further profile groove is bound to the first profile block element.
which is measured in the radial direction R is formed in the groove base of the further profile groove, along the entire extent of the profile groove, and extends starting from the first transverse groove or oblique groove to the second transverse groove or oblique groove, the additional narrow groove running diagonally through the further profile groove from a first groove wall of the further profile groove to a second groove wall of the further profile groove, wherein the first groove wall of the further profile groove is bound to the further profile block element and the second groove wall of the further profile groove is bound to the first profile block element.
3) The tread profile of claim 2, wherein the direction of extent of the further profile groove is formed with a larger directional component in the circumferential direction U than in the axial direction A.
4) The tread profile of claim 1, wherein the groove base of the profile groove is formed with a groove depth t R which is constant along its extent in the direction of extent of the profile groove, wherein, in each cross section perpendicularly to the direction of extent of the profile groove, the groove depth t R is in each case the maximum radial distance from a lateral surface which outwardly bounds the first and second profile block elements in the radial direction R of the tire and forms a contact surface with a road.
5) The tread profile of claim 2, wherein the narrow groove of the profile groove is formed with a larger width c measured along its extent transversely with respect to the direction of extent of the additional narrow groove of the further profile groove.
6) The tread profile of any one of claims 1 to 5, wherein along the extent of the narrow groove , the narrow groove is formed with a width c which is measured transversely with respect to the direction of extent, wherein 0.4 mm <= c <=
1.5 mm.
1.5 mm.
7) The tread profile of any one of claims 2 to 5, wherein along the extent of the additional narrow groove , the additional narrow groove is formed with a width c which is measured transversely with respect to the direction of extent, wherein 0.4 mm <= c <= 1.5 mm.
8) The thread profile of claim 6 or 7, wherein the width c is a constant value.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910044553 DE102009044553A1 (en) | 2009-11-16 | 2009-11-16 | Tread pattern of a vehicle tire |
| DE102009044553.6 | 2009-11-16 | ||
| PCT/EP2010/064018 WO2011057852A1 (en) | 2009-11-16 | 2010-09-23 | Tread profile of a vehicle tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2773444A1 CA2773444A1 (en) | 2011-05-19 |
| CA2773444C true CA2773444C (en) | 2017-07-04 |
Family
ID=43020402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2773444A Active CA2773444C (en) | 2009-11-16 | 2010-09-23 | Tread profile of a vehicle tire |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2501561B1 (en) |
| CA (1) | CA2773444C (en) |
| DE (1) | DE102009044553A1 (en) |
| WO (1) | WO2011057852A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109153292B (en) * | 2016-04-28 | 2020-11-10 | 株式会社普利司通 | Tyre for vehicle wheels |
| DE102022211346A1 (en) | 2022-10-26 | 2024-05-02 | Continental Reifen Deutschland Gmbh | Pneumatic vehicle tires |
| DE102022211347A1 (en) | 2022-10-26 | 2024-05-02 | Continental Reifen Deutschland Gmbh | Pneumatic vehicle tires |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007061148A1 (en) | 2007-12-17 | 2009-06-18 | Continental Aktiengesellschaft | Vehicle tires |
| NL2001388C1 (en) | 2008-03-19 | 2009-09-22 | Apollo Vredestein Bv | Rubber tread for being formed in tire, has longitudinal and transverse grooves formed on gripping surface of profile defining elements, where width of transverse grooves increases towards shoulder of tread |
| DE102008029660A1 (en) | 2008-06-24 | 2009-12-31 | Continental Aktiengesellschaft | Vehicle tires |
| DE102009003642A1 (en) * | 2009-03-19 | 2010-09-23 | Continental Reifen Deutschland Gmbh | Tread pattern of a pneumatic vehicle tire |
-
2009
- 2009-11-16 DE DE200910044553 patent/DE102009044553A1/en not_active Withdrawn
-
2010
- 2010-09-23 CA CA2773444A patent/CA2773444C/en active Active
- 2010-09-23 EP EP10759619.9A patent/EP2501561B1/en active Active
- 2010-09-23 WO PCT/EP2010/064018 patent/WO2011057852A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011057852A1 (en) | 2011-05-19 |
| DE102009044553A1 (en) | 2011-05-19 |
| CA2773444A1 (en) | 2011-05-19 |
| EP2501561B1 (en) | 2013-07-24 |
| EP2501561A1 (en) | 2012-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2632243C2 (en) | Pneumatic motor tire | |
| US10442250B2 (en) | Pneumatic tire | |
| US10377184B2 (en) | Pneumatic tire | |
| US8752600B2 (en) | Pneumatic tire with tread having land portions defining drop lengths | |
| RU2564064C1 (en) | Pneumatic tyre | |
| US8991451B2 (en) | Pneumatic tire with tread having ribs, open sipes and multisipes | |
| CN110891800B (en) | Tyre for vehicle wheels | |
| EP3342605B1 (en) | Tire | |
| US10173476B2 (en) | Pneumatic tire | |
| CN104417280A (en) | Pneumatic tyre | |
| US20120067477A1 (en) | Tire tread having asymmetric chamfering | |
| CA2773444C (en) | Tread profile of a vehicle tire | |
| JP5482445B2 (en) | Pneumatic tire | |
| US9604507B2 (en) | Tread profile of a vehicle tire | |
| CN105705344A (en) | Tire | |
| CA2788247A1 (en) | Pneumatic vehicle tyre | |
| CN108778780B (en) | Tyre for vehicle wheels | |
| EP3397511B1 (en) | Heavy truck tire tread and heavy truck tire | |
| EP3015289A1 (en) | Pneumatic tire | |
| RU2749183C2 (en) | Tire | |
| CN103260903A (en) | Tire | |
| US20170157988A1 (en) | Pneumatic tire | |
| CN109664687B (en) | Pneumatic tire | |
| US20180281527A1 (en) | Pneumatic vehicle tire | |
| CN108058543B (en) | Tyre for vehicle wheels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20150513 |