Tread pattern of a vehicle's pneumatic tire

Abstract

A tread pattern of a vehicle tire, the tread pattern having a tread band (1, 2, 3, 4, 5) extending over the entire circumference of the vehicle pneumatic tire and oriented in the circumferential direction U of the vehicle pneumatic tire, wherein a tread band (1) is formed in the tire shoulder and another tread band (2) is formed adjacently in the axial direction A toward the tire center, the tread bands being separated from each other by circumferential grooves (6), wherein a first protrusion (16) and a second protrusion (17) of the groove bottom (13) of the circumferential groove (6) are formed at the groove bottom (13) in the extension direction of the circumferential groove (6) in a manner distributed across the circumference of the vehicle pneumatic tire, the first protrusion and the second protrusion extending in the transverse direction across the circumferential groove (6) and connecting the two tread bands (1, 2) therein, wherein the protrusions (16, 17) are arranged along the circumferential groove (6) Its extension direction passes through the circumferential groove (6) and forms an inclination angle a with the axial direction A, wherein the climbing direction of the first protrusion (16) formed in the circumferential groove (6) is opposite to the climbing direction of the second protrusion (17) formed in the circumferential groove (6), and is characterized in that the tread band (1) formed in the shoulder is a circumferential rib, and the tread band (2) adjacent to the tire center is a tread block row, and a first protrusion (16) and a second protrusion (17) are respectively formed in the circumferential groove (6) along the extension direction of the tread block (10), wherein the first protrusion (16) connects the tread block termination portion (18) formed in the rotation direction D of the vehicle tire when driving forward with the circumferential rib (1), and the second protrusion (17) connects the tread block starting portion (19) with the circumferential rib.

Description

Technical Field

[0001] The present invention relates to a tread pattern of a pneumatic vehicle tire, the tread pattern comprising a tread band extending over the entire circumference of the pneumatic vehicle tire and oriented in the circumferential direction U of the pneumatic vehicle tire, wherein a tread band is formed in the tire shoulder and a further tread band is formed adjacently in the axial direction A toward the tire center, the tread bands being separated from one another by circumferential grooves, wherein the circumferential grooves are delimited inwardly in the radial direction R by a groove base, and the tread band is delimited outwardly in the radial direction R by a radial outer surface forming a ground contact surface and in the axial direction A toward the circumferential grooves by tread band side edges, the tread band side edges proceeding from the groove base. A groove wall extending outward in a radial direction R to a radially outer surface and constituting a circumferential groove pointing to the tread band, wherein a first protrusion and a second protrusion at the groove bottom are formed at the groove bottom of the circumferential groove in an extension direction of the circumferential groove and in a distributed arrangement across the circumference of the vehicle pneumatic tire, the first protrusion and the second protrusion extending in a transverse direction across the circumferential groove and connecting the two tread bands therein, wherein the protrusions form an inclination angle α with the axial direction A along their extension direction through the circumferential groove, wherein the first protrusion formed in the circumferential groove has a climbing direction opposite to the climbing direction of the second protrusion formed in the circumferential groove. Background Art

[0002] Such tread patterns are already known. For example, US Pat. No. 1,063,941 B2 discloses a pneumatic tire tread design in which the tread band is a circumferential rib separated by circumferential grooves. In this case, protrusions are formed in the circumferential grooves, distributed sequentially around the circumference of the pneumatic vehicle tire. These protrusions extend transversely to the direction of extension of the circumferential groove and connect two circumferential ribs. Some of these protrusions are designed to extend across the circumferential groove in a different direction than other protrusions. This design increases the rigidity of a pneumatic vehicle tire, which is already designed to be very rigid due to the circumferential ribs. Furthermore, in the case of a rigid tread, drainage from the circumferential grooves, and therefore from the tread, is undesirably restricted, particularly in the central region of the tread adjacent to the shoulder ribs, by the circumferential ribs formed on either side of the circumferential grooves. This high rigidity, which limits drainage, can significantly affect hydroplaning properties. The greater increase in rigidity already achieved in the central tread section adjacent to the shoulder ribs by the adjacently arranged circumferential ribs is also enhanced by the additional increase in rigidity achieved by means of the projections, thus negatively affecting the rolling resistance of the tire. Summary of the Invention

[0003] The present invention is therefore based on the object of making it possible to realize a tread pattern for a pneumatic vehicle tire which has a high structural rigidity in order to achieve good handling characteristics while improving rolling resistance properties and water drainage.

[0004] The tire is constructed so that when the tire is in a state of being rotated about the center of the tire, the tire is moved in a direction of rotation relative to the center of the tire. Two protrusions, a first protrusion and a second protrusion extend in the transverse direction across the circumferential groove and connect the two tread bands therein, wherein the protrusions form an inclination angle α with the axial direction A along their extension direction through the circumferential groove, wherein the first protrusion formed in the circumferential groove has a climbing direction opposite to the climbing direction of the second protrusion formed in the circumferential groove, this object is achieved according to the tread pattern of a pneumatic vehicle tire of the present invention, wherein the tread band formed in the shoulder is a circumferential rib, and the tread bands adjacent toward the center of the tire are formed by a tread block row formed by tread blocks arranged in sequence on the circumference of the pneumatic vehicle tire and separated from each other by transverse grooves, and wherein a first protrusion and a second protrusion are respectively formed in the circumferential groove along the extension direction of the tread block, wherein the first protrusion connects the tread block end portion formed in the rotation direction of the vehicle tire when driving forward with the circumferential rib, and the second protrusion connects the tread block start portion with the circumferential rib.

[0005] This design solution allows for good drainage through the transverse grooves formed as rows of tread blocks and arranged toward the inside of the tire. The transverse grooves also flatten the central area of ​​the tread pattern adjacent to the circumferential ribs when the tire is traveling over the contact patch, thereby improving rolling resistance. The circumferential ribs are formed in the shoulders because they increase rigidity precisely in the shoulder, which is important for good handling characteristics.

[0006] Here, forming two projections with differently inclined extension directions at the starting and ending areas of the tread blocks, respectively, can achieve a targeted increase in tire tread rigidity in the area from the circumferential groove to the corresponding adjacent tread blocks, thereby further improving handling characteristics. Arranging the projections in pairs, facing opposite directions, can achieve increased rigidity in both directions of travel. Thus, while achieving good handling characteristics with higher rigidity in tire sections critical for good handling characteristics, better rolling resistance characteristics and improved water drainage can still be achieved.

[0007] According to a particularly advantageous design, the inclination direction of the first projection and the inclination direction of the second projection are each selected so that the projection is oriented with its circumferential component in the direction of the transverse groove of the tread block row closest to the intersection point in the tread block, extending from the intersection point of the projection with the tread band side edge in the tread block through the circumferential groove to the circumferential rib. This design makes it possible to achieve a targeted connection of relatively soft corner sections of the tread block with the circumferential groove and a targeted increase in the rigidity of these corner sections in a simple manner, thereby further contributing to the overall rigidity and balanced wear of the vehicle tire.

[0008] According to a particularly advantageous embodiment, the first and second projections are formed with a height h measured outward from the groove base in the radial direction R, where h ≤ 0.5T, where T represents the tread depth of the vehicle tire measured in the circumferential groove, where T is particularly designed to be 5 mm ≤ T ≤ 9 mm. This allows for a simple and targeted, effective implementation of good handling characteristics, good rigidity, and rolling resistance while simultaneously achieving good water drainage.

[0009] According to a particularly advantageous design, the circumferential grooves are formed with a width B, measured in the axial direction A of the vehicle tire, at a radial position on the radially outer surface of the tread band delimiting the circumferential grooves, that is narrower than the width of all circumferential grooves formed further toward the center of the tire. This design allows for a particularly targeted increase in rigidity in the shoulder region, which is particularly important for good handling characteristics. This targeted increase in rigidity of the shoulder, circumferential rib, and adjacent tread block rows ensures a maximum contact surface for maximum force transmission. When applied to the outer shoulder of the tire, this design achieves optimal force transmission, as desired for sporty driving, and is therefore particularly advantageous for sports tires.

[0010] According to a particularly advantageous design, the circumferential grooves are formed with a width B measured in the axial direction A of the vehicle tire at a radial position of the radially outer surface of the tread band delimiting the circumferential grooves, wherein 3 mm ≤ B ≤ 10 mm. The circumferential grooves are wide enough to achieve good hydroplaning properties and narrow enough to achieve good dry handling properties.

[0011] According to a particularly advantageous embodiment, α is designed to be 15°≤α≤45°. This embodiment can achieve particularly good torsion resistance in a simple manner.

[0012] According to a particularly advantageous design, each of the first and second protrusions has a maximum extension length L measured in the circumferential direction U of the vehicle pneumatic tire, where 3 mm ≤ L ≤ 15 mm. This effectively improves rigidity while ensuring a large negative volume (void) in the circumferential groove region for water absorption and drainage.

[0013] According to a particularly advantageous embodiment, the groove wall directed toward the circumferential rib and formed by the side edge of the circumferential rib directed toward the circumferential groove, i.e., a first extension section extending in the direction of extension of the circumferential groove and designed to extend in the radial direction of extension of the groove wall from the projection to the radial outer surface of the circumferential rib, forms a first inclination angle δ with the radial direction R in a sectional plane on the tire axis, wherein in the circumferential direction U, between two consecutive first extension sections, the groove wall in its radial direction of extension in the sectional plane on the tire axis from the groove base to the radial outer surface of the circumferential rib forms a second inclination angle γ with the radial direction R, wherein γ<δ, and the difference angle β=(δ-γ) is selected to be 5°≤β≤20°. This makes it possible to achieve an additional stiffening effect on the shoulder already in the circumferential groove.

[0014] A particularly advantageous design for improving demoldability during tire manufacturing is one in which the groove wall directed toward the tread block row and formed by the side edge of the tread block row directed toward the circumferential groove forms an inclination angle ε with the radial direction R along its extension direction, along its radial extension direction across the circumference of the vehicle tire on a cross-sectional plane where the tire axis is located, from the groove bottom outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the following, with the help of Figures 1 to 5 The present invention will be described in more detail with reference to the embodiments shown in FIG.

[0016] Figure 1 shows a circumferential section of a tread pattern of a pneumatic vehicle tire for a passenger motor vehicle (PKW),

[0017] Figure 2 Based on Figure 1The cross-sectional view of section II-II shows Figure 1 A cross-sectional view of the circumferential groove of the tread pattern.

[0018] Figure 3 Based on Figure 1 The cross-sectional view of III-III shows a cross-sectional view of the circumferential groove,

[0019] Figure 4 Based on Figure 1 The cross-sectional view of section IV-IV shows the circumferential grooves, and

[0020] Figure 5 Based on Figure 1 The cross-sectional view of section VV shows the circumferential grooves.

[0021] List of Reference Numerals

[0022] 1 Circumferential rib

[0023] 2 tread block rows

[0024] 3 Circumferential ribs

[0025] 4 Circumferential ribs

[0026] 5 Circumferential ribs

[0027] 6 Circumferential grooves

[0028] 7 Circumferential grooves

[0029] 8 Circumferential grooves

[0030] 9 Circumferential grooves

[0031] 10 tread blocks

[0032] 11 transverse grooves

[0033] 12 Radial outer surface

[0034] 13 groove bottom

[0035] 14 side edge

[0036] 15 side edge

[0037] 16 bulge

[0038] 17 bulge

[0039] 18 Tread block start

[0040] 19 Tread block termination DETAILED DESCRIPTION

[0041] exist Figure 1, a tread pattern of a pneumatic tire for a passenger motor vehicle (PKW) is shown. The tread pattern is formed with tread bands arranged adjacent to each other in the axial direction A of the pneumatic tire and separated from each other by circumferential ribs 6, 7, 8, and 9. These tread bands are designed partly as rows of tread blocks of a known type and partly as circumferential ribs of a known type. The pneumatic tire shown is, for example, a sports tire.

[0042] In the illustrated embodiment, the tread pattern is formed by a circumferential rib 1, a row of tread blocks 2, a circumferential rib 3, a circumferential rib 4, and a circumferential rib 5 arranged adjacent to each other in the axial direction A of the vehicle pneumatic tire. In the axial direction A, the circumferential rib 1 and the row of tread blocks 2 are separated from each other by circumferential grooves 6 extending over the entire circumference of the vehicle pneumatic tire and oriented in the circumferential direction U. In the axial direction A of the vehicle pneumatic tire, the row of tread blocks 2 and the circumferential rib 3 are separated from each other by circumferential grooves 7 extending over the entire circumference of the vehicle pneumatic tire and oriented in the circumferential direction U. In the axial direction A of the vehicle pneumatic tire, the circumferential rib 3 and the circumferential rib 4 are separated from each other by circumferential grooves 8 extending over the entire circumference of the vehicle pneumatic tire and oriented in the circumferential direction U. In the axial direction A of the pneumatic vehicle tire, circumferential ribs 4 and 5 are designed to be separated from each other by circumferential grooves 9 that extend over the entire circumference of the pneumatic vehicle tire and are oriented in the circumferential direction U. Circumferential ribs 1, 3, 4, and 5 each extend over the entire circumference of the pneumatic vehicle tire and are oriented in the circumferential direction U of the pneumatic vehicle tire. Tread block row 2 is formed in a known manner from tread blocks 10 distributed over the circumference of the pneumatic vehicle tire and separated from each other in the circumferential direction U by transverse grooves 11. Transverse grooves 11 extend from circumferential groove 7 in the axial direction A of the pneumatic vehicle tire, through tread block row 2, and into circumferential groove 6. Circumferential ribs 1 and 5 are each arranged in the shoulder of the pneumatic vehicle tire and constitute shoulder circumferential ribs. Tread block row 2 and circumferential ribs 3 and 4 are designed to be arranged in the axial direction A between the two circumferential ribs 1 and 5 formed in the shoulder.

[0043] like Figure 1 As shown, the ground contact width T of the vehicle pneumatic tire (measured at normal tire pressure under standard load operation) A It extends inward from a certain axial position within the axial extension of the circumferential rib 5 .

[0044] In the embodiment shown, the circumferential rib 1 is formed on the shoulder pointing away from the vehicle's outer side OU when mounted on the vehicle. The circumferential rib 5 is formed on the shoulder pointing toward the vehicle's inner side IN when mounted on the vehicle.

[0045] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5 Taking the circumferential rib 1 and the tread block row 2 as an example, the circumferential ribs 1, 3, 4 and 5 and the tread block row 2 are respectively defined outwardly by a radial outer surface 12 in the radial direction R of the vehicle pneumatic tire. A The extended range constitutes the outer side of the tire that contacts the ground.

[0046] The circumferential grooves 6, 7, 8 and 9 are delimited inwardly in the radial direction R of the vehicle pneumatic tire by a groove base 13, as shown in FIG. Figures 2 to 5 Circumferential groove 6 is shown as an example. On both sides of the groove base 13, the circumferential grooves 6, 7, 8 and 9 are each delimited in the axial direction A of the vehicle pneumatic tire by a groove wall, which is formed by the side edges of the circumferential ribs or tread blocks that delimit the circumferential grooves and point toward the corresponding circumferential groove.

[0047] like Figures 2 to 4 As shown, the circumferential rib 1 is delimited towards the circumferential groove 6 by a rib side edge 15 which extends outwards in the radial direction R of the vehicle pneumatic tire from the groove bottom 13 of the circumferential groove 6 to the radial outer surface 12 of the circumferential rib 1. Figure 2 、 Figure 3 and Figure 5 As shown, the blocks of the block row 2 are delimited in the axial direction A towards the circumferential groove 6 by side edges 15 which extend in the radial direction R from the groove base 13 outwards to the radial outer surface 12 delimiting the respective block 10 of the block row 2 .

[0048] Here, the side edge 14 forms a groove wall which delimits the circumferential groove 6 towards the circumferential rib 1. The side edge 15 of the tread block 10 forms another groove wall which delimits the circumferential groove 6 towards the row 2 of tread blocks.

[0049] Furthermore, in a similar manner, the transverse grooves 11, each of which separates two tread blocks 10 of the tread block row 2 arranged adjacently in the circumferential direction U of the vehicle pneumatic tire, are delimited inwardly in the radial direction R of the vehicle pneumatic tire by a groove base and on both sides of the groove base in a known manner by block side edges respectively delimiting the corresponding tread block toward the transverse groove, these block side edges respectively constituting groove walls delimiting the transverse groove toward the tread block.

[0050] When driving forward, the tread blocks 10 of the tread block row 2 are bounded by side edges formed at their rearward extending ends 18 toward the next transverse groove 11 and by side edges formed at their forward extending ends 19 toward the previous transverse groove 11 in the direction of rotation D of the vehicle pneumatic tire.

[0051] like Figures 2 to 5As shown, the circumferential groove 6 is formed with a groove depth T in the radial direction R along its extension direction in the circumferential direction, which constitutes the tread depth and extends inwardly along the radial direction R from the radial outer surface 12 of the circumferential rib 1 or the tread block row 2 to the deepest point of the groove bottom.

[0052] As in Figure 1 As can be seen in the figure, along the extension direction of the circumferential groove 6, across the circumference of the vehicle pneumatic tire, at the groove bottom 13 of the circumferential groove 6, there are strip-shaped protrusions 16 and 17 arranged in an alternating order and at a certain distance from each other. These protrusions start from the side edge 14 and extend through the circumferential groove 6 in a manner that forms an inclination angle α with the axial direction A to the side edge 15 of the tread block row 2.

[0053] The inclination angle α is designed to be 15°≤α≤45°, and in the illustrated embodiment is correspondingly designed to be α=30°.

[0054] The web-shaped projections 16 and 17 each extend radially outward from the deepest point of the groove bottom 13 in the radial direction R to an extension height h, wherein h≤(0.5T A ).

[0055] The depth T is selectively designed to be 5 mm ≤ T ≤ 9 mm. The extension height h is selectively designed to be h ≥ 1 mm.

[0056] In the illustrated embodiment, h is selectively designed to be h=1.2 mm.

[0057] Protrusions 16 and 17 are each delimited in the circumferential direction U of the pneumatic vehicle tire by a web wall extending in the radial direction R of the vehicle tire from the groove base 13 to the radial outer surface of the web-shaped protrusion. The web walls of the two web-shaped protrusions are oriented so as to extend parallel to one another at an angle of inclination α. ​​The web-shaped protrusions 16 and 17 each have an extension length L in the circumferential direction U, with 3 mm ≤ L ≤ 15 mm, measured radially outwardly from the radial outer surface of the web-shaped protrusion delimited thereby.

[0058] In the embodiment shown, L=10 mm was chosen.

[0059] As in Figure 1 As can be seen in FIG, the rib-shaped protrusion 16 is designed to extend along its extension direction from the side edge 14 of the circumferential rib 1 through the circumferential groove 6 to the side edge 15 of the tread block row 2 with a direction component opposite to that of the rib-shaped protrusion 17 in the circumferential direction U. Therefore, although the rib-shaped protrusions 16 and 17 are each oriented to be inclined at an inclination angle α, they have opposite inclination directions.

[0060] As in Figure 1As can be seen in the figure, each tread block, here a row of tread blocks 2, is correspondingly assigned a pair of protrusions consisting of a tab-shaped protrusion 16 and a tab-shaped protrusion 17. Here, the tab-shaped protrusion 16 is formed within the extension of the side edge 15 at an extended end 18 of the tread block 10, which is located at the rear in the rotational direction D of the vehicle pneumatic tire and is bounded by the next transverse groove. The tab-shaped protrusion 17 is formed within the extension of the side edge 15 at an extended end 19 of the tread block 10, which is located at the front in the rotational direction D of the vehicle pneumatic tire and is bounded by the previous transverse groove. Here, the inclination direction of the two web-shaped protrusions 16 and 17 assigned to the tread block 10, which encloses an inclination angle α with the axial direction A, is selectively designed so that the extension direction of the two web-shaped protrusions, starting from the side edge 14 of the circumferential rib 1 in the direction of the side edge 15 of the tread block row 2, intersects beyond the side edge 15 in the extension range of their extension direction.

[0061] The inclination direction of the web-shaped projections 16 and the inclination direction of the web-shaped projections 17 are selected so that the respective projections 16 and 17 are oriented with their respective circumferential direction components in the direction of the nearest transverse groove 11 of the tread block row 2, starting from the intersection of the projections with the tread strip side edges 15 of the tread blocks 10 assigned to them, along their extension direction through the circumferential groove 6 to the circumferential rib 1.

[0062] As in Figure 1 As can be seen in the figure, each transverse groove 11 of the tread block row 2 is arranged between two closely adjacent web-shaped protrusions 16 and 17 in the circumferential direction U of the vehicle pneumatic tire at the location where it opens into the circumferential groove 6, and the side edge 15 opens into the circumferential groove 6 and is therefore located at the axial position where the distance between the two protrusions 16 and 17 measured in the circumferential direction U is the largest.

[0063] The circumferential groove 6 is formed along its extending direction in the circumferential direction U at a certain radial position on the radial outer surface 12 of the adjacent circumferential rib 1 or tread block row 2 with a width B measured in the axial direction A of the vehicle pneumatic tire. The side edges 15 of the tread block row 2 extend radially outward from the groove base 13 along the radial direction R of the vehicle pneumatic tire on a cross-sectional plane containing the tire axis, and extend obliquely toward the shoulder IN along its radial extending direction, enclosing an inclination angle ε with the radial direction R of the vehicle pneumatic tire.

[0064] In a circumferentially extending section 20 between two radial protrusions 16 and 17 arranged successively in the circumferential direction U, the side edge 14 is correspondingly designed to extend obliquely toward the shoulder OU in a manner enclosing an inclination angle γ with the radial direction R on a cross-sectional plane containing the tire axis. In a circumferentially extending section 21 (which extends outwardly from the protrusion 16 or 17 on the side edge 14 in the radial direction R of the vehicle pneumatic tire), the side edge 14 is correspondingly designed to extend obliquely toward the shoulder OU in a manner enclosing an inclination angle δ with the radial direction R on a cross-sectional plane containing the tire axis, where δ>γ>ε.

[0065] Here, β, which represents the difference angle β=(δ-γ), is selectively designed to be 5°≤β≤20°. For example, β=10° is selected.

[0066] In an embodiment, Figure 4 As shown, the extension 21 extends from the projections 16 and 17 in each case with an extension length L measured in the circumferential direction U outward in the radial direction R, in each case at an angle λ to the radial direction R, with a circumferential component opposite to the direction of inclination, wherein λ is selected to be 0°≤λ≤10°. The inclined circumferential component is directed in the same direction as the circumferential component of the extension direction of the respective web-shaped projection 16 or 17 from the side edge 15 to the side edge 16.

[0067] The width B of the circumferential groove 6 is designed to be 3 mm ≤ B ≤ 10, for example, B = 4 mm.

[0068] The width B of the circumferential groove 6 is selected to be smaller than the widths B7 and B8 of the circumferential grooves 7 and 8 formed further towards the center of the vehicle tire.

[0069] In the illustrated embodiment, the width B of the circumferential groove 6 formed toward the outer shoulder OU is designed to be narrower than the widths B7, B8, and B9 of all other circumferential grooves 7, 8, and 9 of the vehicle pneumatic tire.

Claims

1. A tread pattern of a vehicle tire, said tread pattern comprising a tread band (1, 2, 3, 4, 5) extending over the entire circumference of the vehicle pneumatic tire and oriented in the circumferential direction U of the vehicle pneumatic tire, wherein a tread band is formed in the tire shoulder and a further tread band is formed adjacently in the axial direction A toward the tire center, said tread band formed in the tire shoulder and said further tread band being separated from each other by circumferential grooves (6), wherein said circumferential grooves (6) are formed inwardly in the radial direction R by groove bottoms (1 3), and the tread strips (1, 2, 3, 4, 5) are delimited outwardly in the radial direction R by a radial outer surface (12) forming the ground contact surface and in the axial direction A towards the circumferential groove (6) by tread strip side edges (14, 15), said tread strip side edges extending outwardly in the radial direction R from the groove base (13) to the radial outer surface (12) and forming groove walls of the circumferential groove (6) pointing towards the tread strip formed in the shoulder and the further tread strip, wherein a first protrusion (16) and a second protrusion (17) of the groove bottom (13) are formed at the groove bottom (13) of the circumferential groove (6) in a manner distributed across the circumference of the vehicle pneumatic tire along the extension direction of the circumferential groove (6), wherein the first protrusion and the second protrusion extend across the circumferential groove (6) in the transverse direction and connect the tread band formed in the shoulder and the further tread band, wherein the first protrusion and the second protrusion enclose an inclination angle α with the axial direction A along their extension direction through the circumferential groove (6), wherein the first protrusion (16) formed in the circumferential groove (6) has a climbing direction opposite to the climbing direction of the second protrusion (17) formed in the circumferential groove (6), It is characterized by: The tread band formed in the shoulder is a circumferential rib, and the further tread band adjacent toward the center of the tire is a row of tread blocks (10) arranged one after the other on the circumference of the vehicle pneumatic tire and separated from one another by transverse grooves (11), the tread blocks forming a tread block end portion and a tread block start portion in the rotation direction D of the vehicle tire when driving forward, A first protrusion (16) and a second protrusion (17) are respectively formed in the circumferential groove (6) along the extension direction of the tread block (10), wherein the first protrusion (16) connects the tread block end portion with the circumferential rib (1), and the second protrusion (17) connects the tread block start portion with the circumferential rib.

2. The tread pattern according to claim 1, The inclination direction of the first protrusion (16) and the inclination direction of the second protrusion (17) are each selected so that the first protrusion and the second protrusion are oriented with their circumferential components in the direction of the transverse groove (11) of the tread block row (2) closest to the intersection point in the tread block (10), and each starts from the intersection point of the first protrusion or the second protrusion with the tread band side edge (15) in the tread block (10) and passes through the circumferential groove (6) along the extension direction until reaching the circumferential rib (1).

3. The tread pattern according to claim 1 or 2, wherein the first protrusion (16) and the second protrusion (17) are formed with an extension height h measured outwardly from the groove base (13) in a radial direction R, wherein h≤0.5T, wherein T constitutes the tread depth of the vehicle tire measured in the circumferential groove (6), in, T is designed to be 5mm≤T≤9mm.

4. The tread pattern according to claim 1, wherein the circumferential grooves (6) are formed with a width B measured in the axial direction A of the vehicle tire at a radial position of the radially outer surface (12) of the tread band formed in the shoulder and the further tread band delimiting the circumferential grooves, the width being narrower than the width of all circumferential grooves formed positioned further toward the center of the tire.

5. The tread pattern according to claim 1, It is characterized by: The circumferential groove (6) is formed with a width B measured in the axial direction A of the vehicle tire at a radial position of the radially outer surface (12) of the tread band formed in the shoulder and the further tread band delimiting the circumferential groove, the width being narrower than the widths of all other circumferential grooves formed in the tread pattern.

6. The tread pattern according to claim 1, The circumferential groove (6) is formed with a width B measured in the axial direction A of the vehicle tire at a radial position of the radially outer surface (12) of the tread band formed in the shoulder and the further tread band delimiting the circumferential groove, wherein 3 mm ≤ B ≤ 10 mm.

7. The tread pattern according to claim 1, Here, α is designed to be 15°≤α≤45°.

8. The tread pattern according to claim 1, The first protrusion (16) and the second protrusion (17) are each formed with a maximum extension length L measured along the circumferential direction U of the vehicle pneumatic tire, wherein 3mm≤L≤15mm.

9. The tread pattern according to claim 1, wherein the groove wall directed toward the circumferential rib (1) and formed by the side edge (14) of the circumferential rib (1) directed toward the circumferential groove (6), i.e., the first extension section (21) extending along the extension direction of the circumferential groove (6) and designed to extend from the first protrusion and the second protrusion along the radial extension direction of the groove wall to the radial outer surface (12) of the circumferential rib (1), forms a first inclination angle δ with the radial direction R on the cross-sectional plane where the tire axis is located, Wherein, in the circumferential direction U, between two adjacent first extension sections (21) arranged in sequence, the groove wall forms a second inclination angle γ with the radial direction R along its radial extension direction from the groove bottom (13) to the radial outer surface (12) of the circumferential rib (1) on the section plane where the tire axis is located, wherein γ<δ, wherein the difference angle β=(δ-γ) is selected to be 5°≤β≤20°.

10. The tread pattern according to claim 1, The groove wall pointing to the tread block row (2) and formed by the side edge (15) of the tread block row pointing to the circumferential groove (6) forms an inclination angle ε with the radial direction R along its extension direction, along its radial extension direction from the groove bottom (13) outwards across the circumference of the vehicle tire on the cross-sectional plane where the tire axis is located.

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