Vehicle pneumatic tire

Abstract

Vehicle pneumatic tire having a tread with a shoulder block row (1) of shoulder blocks (2) and inclined grooves (4) which implement a tread depth (T P ) of up to 20 mm, the inclined grooves having shoulder groove sections (4b) which separate the shoulder blocks (2) from one another and extend at an angle (β) of 0° to 15° with respect to the axial direction in a top view, wherein the shoulder blocks (2) are each provided with a number of first incisions (9) which extend parallel to one another and at an angle (ε) of 0° to 15° with respect to the axial direction in a top view and in particular also parallel to the shoulder groove sections (4b), with a width (bE1) of 0.4 mm to 1.2 mm, wherein the shoulder blocks (2) are each provided with a unique further incision (10) which is formed between two first incisions (9) and extends parallel to these two first incisions in a top view, wherein the first incisions (9) and the further incisions (10) each have an incision wall (11) and a maximum depth (t P ) which corresponds at least to the tread depth (T E ) minus 2.5 mm. The further incisions (10) cross the shoulder blocks (2) in the base support surface and are each provided with at least one incision pocket (13) which reaches at least up to the maximum depth (t E ) of the further incisions in the radial direction from the tread circumference, the incision pocket being formed by a recess (14) at one incision wall (11) and a recess (14) at the other incision wall (11), and wherein the further incisions (10) have a width (b E2 ) of 0.4 mm to 1.2 mm outside the incision pocket / pockets (13).

Description

Technical Field

[0001] This invention relates to a pneumatic tire for a vehicle, the pneumatic tire having a tread having a row of shoulder-side tread blocks with shoulder-side tread blocks and oblique grooves extending to the tread depth. These oblique grooves have shoulder-side groove sections that separate the shoulder-side tread blocks from each other and extend at an angle of 0° to 15° relative to the axial direction in a top view. Each shoulder-side tread block has a certain number of first grooves, which extend at an angle of 0° to 15° relative to the axial direction in a top view and parallel to each other, especially parallel to the groove sections on the shoulder side, and have a width of 0.4 mm to 1.2 mm. Each shoulder-side tread block has a unique additional groove formed between the two first grooves and extending parallel to the two first grooves in a top view. Each of the first grooves and the additional groove has a groove wall and a maximum depth, which is at least equivalent to the tread depth minus 2.5 mm. Background Technology

[0002] Such pneumatic tires for vehicles are known, for example, from DE 10 2015 224 291 A1. These pneumatic tires have a tread restricted by the direction of travel, the tread having oblique grooves extending V-shaped toward each other across the tread width. The oblique grooves consist of groove segments on the inner side of the tread and groove segments on the shoulder side. The groove segments on the inner side of the tread extend at an angle of at least 30° relative to the axial direction, and the groove segments on the shoulder side extend at an angle of 5° to 25° relative to the axial direction. The groove segments on the shoulder side extend between tread blocks belonging to a row of tread blocks on the shoulder side. Each tread block on the shoulder side has a number of first grooves and additional grooves extending parallel to these first grooves, which, in a top view, extend parallel to the groove segments on the shoulder side and have a width of 0.4 mm to 0.6 mm. The additional grooves terminate within the tread blocks on the shoulder side of the inner tread surface, extending beyond the bottom support surface and being wider than the first grooves. The tread consists of three segments with different circumferential lengths. In the shoulder tread blocks belonging to the segment with the shortest circumferential length, two first grooves extend; in the shoulder tread blocks belonging to the segments with the medium circumferential length, correspondingly two first grooves extend and one additional groove extends between these two first grooves; and in the tread blocks belonging to the segment with the longest circumferential length, correspondingly three first grooves extend and one additional groove extends between two of these first grooves. The greater the circumferential length of the subordinate segment, the wider the additional grooves. This design benefits dry handling and snow grip characteristics, while also maintaining good water drainage.

[0003] In the case of pneumatic tires of the type mentioned at the beginning, the diagonal grooves extending almost circumferentially in the central tread area have proven beneficial for tread drainage. Due to this configuration, the tread blocks on the shoulder side of the tread have a relatively large circumferential length, which, due to their higher block stiffness, is advantageous for dry handling characteristics. However, the drainage performance of these tread blocks in the shoulder side area needs improvement. Summary of the Invention

[0004] Therefore, the objective of this invention is to improve the drainage performance in the tread block area on the shoulder side of a vehicle pneumatic tire of the type mentioned at the beginning, while maintaining the highest possible block stiffness.

[0005] According to the invention, the aforementioned task is achieved by the following manner: an additional groove extends across the tread block on the shoulder side within the bottom support surface and is provided with at least one groove pocket, the groove pocket extending radially from the periphery of the tread to at least the maximum depth of the additional groove, the groove pocket being composed of a recess located at one groove wall and a recess located at another groove wall, and wherein the additional groove has a width of 0.4 mm to 1.2 mm outside the groove pocket / multiple groove pockets.

[0006] Because the additional grooves with pockets traverse the tread blocks on the shoulder side, when passing over the bottom support surface, these additional grooves open up more significantly than the grooves that are not visible from the shoulder side tread blocks inside the tread. This allows the pockets to effectively absorb water (melted water or rainwater) when driving on wet surfaces, thus significantly improving the water drainage capacity of the shoulder side tread blocks. Since the grooves are narrower outside the pockets, high block stiffness, beneficial for dry handling of the shoulder side tread blocks, is maintained.

[0007] According to a preferred embodiment, the additional groove is one of two intermediate grooves when the number of grooves is even and an intermediate groove when the number of grooves is odd. These embodiments are beneficial for optimal block stiffness. In particular, they preserve the favorable bending behavior of the block edge region, which is crucial in this respect and is adjacent to the groove section on the shoulder side of the diagonal groove.

[0008] A particularly advantageous and balanced trade-off between high block stiffness and drainage performance is achieved by, when viewed from the top view, the slotted pocket / multiple slotted pockets occupy 40% to 70%, especially 45% to 60%, of the length of the additional slots projected in the axial direction within the bottom support surface.

[0009] According to another preferred embodiment, viewed in a top view, the grooved pocket / multiple grooved pockets have a plane of symmetry oriented in the longitudinal extension dimension of the additional grooves and extending in the radial direction, wherein, viewed in a section perpendicular to the plane of symmetry, the grooved pocket / multiple grooved pockets have a width of 1.5 mm to 4.0 mm, particularly up to 3.5 mm, at the tread periphery. This design further improves the water absorption performance of the grooved pockets.

[0010] The following describes particularly advantageous and combinable design solutions that have a beneficial effect on the absorbency of the slotted pocket / multiple slotted pockets.

[0011] According to the first preferred design, the width of the grooving pocket / multiple grooving pockets is 200% to 600%, especially up to 500%, of the width of the other grooves.

[0012] According to the second preferred design, the grooving pocket / multiple grooving pockets are defined in the radial direction by a pocket bottom or each pocket bottom, which extends in the plane of symmetry to a constant depth obtained in the radial direction and is located at the level of the maximum depth, the level of the tread depth, or between these levels.

[0013] The second preferred design is further characterized in that, in the plane of symmetry, the bottom of the tread has a radial distance of 0.5 mm to 1.5 mm from the horizontal of the maximum depth, and / or a radial distance of 0.5 mm to 2.5 mm, particularly 1.0 mm to 2.0 mm, and especially preferably 1.5 mm from the horizontal of the tread depth.

[0014] According to the third preferred design, the additional groove is provided with exactly two groove pockets. These two groove pockets, when viewed in a top view and with reference to the plane of symmetry, have a first distance between them projected in the axial direction. The groove pocket further out of the tread has a second distance between it and the lateral edge of the bottom support surface projected in the axial direction, and the groove pocket further in the tread has a third distance between it and the end of the groove on the inner side of the tread. The first distance, the second distance, and the third distance are each at least 3.0 mm.

[0015] The fourth preferred design is characterized in that the slotted pocket / multiple slotted pockets have a rectangular shape that extends in the direction of the plane of symmetry in the top view, and the recess is implemented in a trapezoidal or rectangular shape when viewed toward the corresponding slotted wall.

[0016] According to another preferred embodiment, as viewed in a top view, the additional groove consists of a main groove section reaching its maximum depth and two shallower groove edge sections, wherein the main groove section has a length projected in the axial direction that is 60% to 90% of the axially projected length of the additional groove as derived within the bottom support surface.

[0017] Furthermore, according to another preferred embodiment, the tread is configured to be restricted by the direction of travel and have V-shaped, intersecting diagonal grooves extending into each other over the tread width, wherein, in each tread half, grooves of tread blocks that are inclined in the opposite direction to the diagonal grooves in a top view and jointly demarcate the shoulder side extend between adjacent diagonal grooves in the circumferential direction.

[0018] Advantageously, in the previous embodiment, the groove extends straight in the top view and has an inward groove end that first enters the ground when the tire rolls forward, and an outward groove end, wherein the groove centerline extending beyond the outward groove end forms an opposing apex angle of 80° to 120°, especially 90° to 110°, with the groove centerline of the corresponding oblique groove in the axial direction.

[0019] The grooves mentioned extend at an angle of 15° to 55°, preferably 25° to 45°, relative to the circumferential direction.

[0020] In the above-described embodiment of a tread that is restricted by the direction of travel, each tread block on the shoulder side has an inward block edge and an outward block edge. For the benefit of block stiffness, the tread blocks on the shoulder side are provided with an even number of grooves, wherein the additional grooves are intermediate grooves closer to the outward block edge.

[0021] According to another preferred embodiment, the tread blocks on the shoulder side are provided with five to nine grooves, especially six to eight grooves. This is particularly advantageous for the water drainage performance of the tread blocks on the shoulder side, which have a relatively large circumferential length due to the oblique grooves. Attached Figure Description

[0022] Other features, advantages, and details of the invention will now be described in detail with the aid of the accompanying drawings, which schematically illustrate embodiments of the invention. In the drawings:

[0023] Figure 1 A partially developed top view of the tread of a vehicle pneumatic tire having an embodiment of the present invention is shown.

[0024] Figure 2 Show Figure 1 A magnified top view of detail Z2 in the image.

[0025] Figure 3 Show Figure 2 Another enlarged top view of the Z3 in detail.

[0026] Figure 4 Show along Figure 2 The cross section of line IV-IV in the middle,

[0027] Figure 5 Show along Figure 2 The cross section of line VV in the middle, and

[0028] Figure 6 Show along Figure 2 The cross section of line VI-VI in the middle.

[0029] List of reference numerals

[0030] 1........................Tread blocks on the shoulder side

[0031] 2........................Tread blocks on the tire shoulder

[0032] 2a.......................Block region

[0033] 2b.......................Outer surface of block

[0034] 3........................Intermediate tread blocks

[0035] 4........................Diagonal groove

[0036] 4a.......................Inner groove section of the tire tread 4b.......................Groove section on the tire shoulder side

[0037] 5........................Groove

[0038] 5a.......................The end of the rolled-in groove

[0039] 5b.......................The end of the rolled-out groove

[0040] 6........................The edge of the rolled-in block

[0041] 7........................The edge of the rolled-out block

[0042] 7a, 7b......edge sections

[0043] 8........................block edge

[0044] 9........................ Grooving

[0045] 10....................... Grooving

[0046] 10a......................Main section of the cutting groove

[0047] 10b......................Gutter edge section

[0048] 11.............Grooving wall

[0049] 12....................... Bottom of the groove

[0050] 13.......................Cut groove pocket

[0051] 13a......................bottom pocket

[0052] 14.............................Concave

[0053] 14a......................Bottom

[0054] 14b......................Side wing surface

[0055] Spacing between a1, a2, a3...

[0056] AA......................line (tire equatorial plane)

[0057] B、b E1 b E2 b N b T .........width

[0058] E1, E2... planes of symmetry

[0059] l........................line (lateral edge of the bottom support surface)

[0060] l a1 l a2 l E ...............length

[0061] L........................ segment

[0062] m N .......................Groove centerline

[0063] m SR .......................Groove center line

[0064] M........................ segment

[0065] R........................Arrow (Scrolling direction)

[0066] S........................ segment

[0067] S1.......................Intersection Point

[0068] t1.......................Tangent

[0069] t E Maximum depth

[0070] t S Tangent

[0071] t V1 .......................depth

[0072] T P .......................Tread depth

[0073] Z........................Central tread area

[0074] Z2, Z3....................Details

[0075] α, β, γ, ε, θ... angles

[0076] δ, δ'.................vertex Detailed Implementation

[0077] The pneumatic tires of the present invention are tires for multi-rail motor vehicles and preferably radial tires for passenger motor vehicles, trucks or light trucks (light-duty vehicles with a permissible gross weight ≤ 7.5t).

[0078] Figure 1 A partially unfolded top view of the tread of a vehicle pneumatic tire is shown, the tread having a tread pattern implemented to be limited by the direction of travel. The vehicle pneumatic tire is mounted on the vehicle such that, when moving forward, the vehicle pneumatic tire has a rolling direction indicated by arrow R. The lateral edge of the bottom support surface (corresponding to the statically measured contact area at 70% of maximum load capacity under 85% internal pressure, according to the European Tire & Rim Technology Organization Standard (ETRTO-Standard)) is indicated by line l, wherein the bottom support surface has a width B in the axial direction. Furthermore, the tire equatorial surface is marked by line AA.

[0079] The tread noise is optimized using a segment length variation method, and the tread consists of segments (similar to tread tread sections) that are sequentially arranged in the circumferential direction. In the illustrated embodiment, segments S, M, and L are provided with three different circumferential lengths. Segment L has the largest circumferential length, segment M has a medium circumferential length, and segment S has the smallest circumferential length. Segments S, M, and L are arranged in the circumferential direction of the tread within a so-called segment sequence that is typically calculated.

[0080] The tread has two shoulder-side tread blocks 2 and a central tread area Z with a middle tread block 3, wherein the shoulder-side tread blocks 2 and the middle tread block 3 are separated from each other by oblique grooves 4 and grooves 5.

[0081] The oblique grooves 4 extend in a V-shape across the tread width, intersecting each other in the area of ​​the tire equatorial plane (line AA), and also extending beyond the side edge (line l) of the bottom support surface, forming the main grooves of the tread and being implemented in the radial direction to a correspondingly set tread depth T of typically 6.0 mm to 13.0 mm, especially up to 10.0 mm. P ( Figure 4In the top view, the diagonal grooves 4 extending beyond the same lateral edge (line l) of the bottom support surface extend parallel to each other. The diagonal groove 4 extending beyond one lateral edge (line l) of the bottom support surface is offset in the circumferential direction from the diagonal groove 4 extending beyond the other lateral edge (line l) of the bottom support surface in a barely perceptible manner.

[0082] Each oblique groove 4 has a groove centerline m. SR Furthermore, as observed in the top view, it consists of a groove segment 4a extending less curved along the inner side of the tread and a groove segment 4b extending straight along the shoulder side with a greater inclination relative to the circumferential direction. The groove segment 4a on the inner side of the tread has (referring to the groove centerline m) SR The length l projected in the axial direction a1 This length is 25% to 35% of the width B of the bottom support surface, and the groove section on the inner side of the tread (also referring to the groove centerline m) SR The groove extends at an angle α of 30° to 55° relative to the axial direction, wherein the angle α is referenced to the groove centerline m applied locally. SR tangent t1( Figure 2 This is derived from the fact that the groove section 4b on the shoulder side is referenced to the groove centerline m. SR It extends at an angle β of 0° to 15°, especially up to 10°, relative to the axial direction.

[0083] In each tread half, three previously mentioned grooves 5 are constructed between adjacent oblique grooves 4 in the circumferential direction. Figure 2 Groove 5 (refer to the center line m of the groove that follows its direction) N It extends straight in the top view, parallel to each other in each tread half. Figure 1 The groove 5 extends at an angle γ of 15° to 55°, particularly 25° to 45°, relative to the circumferential direction, and is inclined in the opposite direction to the oblique groove 4 with respect to the circumferential direction. Each groove 5 has a maximum depth in the radial direction, which is the tread depth T. P ( Figure 4 75% to 100%, especially 80% to 90%; having a 2.0 mm to 6.0 mm, especially 3.0 mm to 5.0 mm, perpendicular to the center line of the groove at the tread periphery. N The resulting width b NIt also has an inward groove end 5a that first enters the ground when the tire rolls forward (arrow R), and an outward groove end 5b. In the groove 5 formed on the outermost side of the tread in each tread half, the inward groove end 5a is located at the area where the groove section 4a on the inner side of the corresponding oblique groove 4 and the groove section 4b on the shoulder side are connected to each other, and the outward groove end 5b is located at the groove section 4a on the inner side of the corresponding oblique groove 4.

[0084] like Figure 3 As shown, the groove centerline m extends 5b beyond the end of the rolled-out groove. N m with the center line of the groove SR It has an intersection point S1, where the center line of the groove is m N m with the center line of the groove SR Forming vertices δ opposite each other in the axial direction and δ' opposite each other in the circumferential direction. Vertex angles δ and δ' are respectively located at the center line m of the extended groove. N and tangent t S It is derived from this that the tangent is applied to... Figure 3 The center line of the groove extends almost without any obvious curvature. SR And it extends through the intersection point S1. Due to the high magnification, the tangent t S Very close to the center line of the groove m SR This makes them appear to overlap. The angle α of the groove segment 4a, which belongs to the inner side of the tread of the oblique groove 4, is mentioned. Figure 2 ) and the same mentioned angle γ, which belongs to groove 5 Figure 2 They are coordinated with each other so that the apex angle δ of the opposite sides in the axial direction is 80° to 120°, especially 90° to 110°.

[0085] like Figure 1 As shown, according to the described tread pattern, the intermediate tread blocks 3 have a substantially parallelogram shape in the top view, wherein these intermediate tread blocks are arranged in a manner that the "vertices" of the parallelograms stand upright along the circumferential direction. Furthermore, the intermediate tread blocks 3 are preferably provided with grooves, these grooves in... Figure 1 It is not shown in the figure and can be implemented in a known manner.

[0086] The following section uses the tread block 2 on a single tire shoulder side as an example to illustrate other design aspects of the tread block 2 on the tire shoulder side.

[0087] refer to Figure 2According to the described tread pattern, the tread block 2 on the shoulder side extends longitudinally in the axial direction and includes a triangular block region 2a in top view, defined by adjacent grooves 5, on the inner side of the tread. This block region is indicated by a dashed line forming the base of a basic triangle. The tread block 2 on the shoulder side has an outer block surface 2b located in the periphery of the tread, defined by block edges 6, 7, and 8. Block edges 6 and 7 are formed on adjacent oblique grooves 4 and reach the grooves 5. When the tire rolls forward (arrow R), block edge 6 rolls into the ground before block edge 7, such that block edge 6 is subsequently referred to as the inward block edge 6 and block edge 7 as the outward block edge 7. The inward block edge 6 extends on the groove segment 4b on the corresponding outer side of the tread. The outward block edge 7 has a bend and consists of an edge segment 7b extending on the groove segment 4b on the corresponding outer side of the tread and an edge segment 7a formed on the triangular block region 2a. The edge 8 of the block is formed along the groove 5.

[0088] The tread block 2 on the shoulder side has a number of grooves 9 and a single groove 10 that are substantially evenly distributed along its circumferential length. In a top view, the grooves 9 and 10 extend straight, parallel to each other, and at an angle ε of 0° to 15°, particularly up to 10°, relative to the axial direction. They extend beyond the lateral edge (line l) of the bottom support surface and lead into the groove 5 or, via the edge segment 7a, into the groove segment 4a on the inner side of the tread. Preferably, the angle ε of the grooves 9 and 10 differs from the angle β of the groove segment 4b on the outer side of the tread by a maximum of 2°. In the illustrated embodiment, angle ε and angle β are the same, such that, in a top view, the grooves 9 and 10 extend parallel to the groove segment 4b on the outer side of the oblique groove 4. (Reference) Figure 1 Each tread block 2 located on the shoulder side in segment S has five grooves 9, each tread block 2 located on the shoulder side in segment M has six grooves 9, and each tread block 2 located on the shoulder side in segment L has seven grooves 9.

[0089] Figure 2 It is also shown that the groove 9 has a constant width b of 0.4 mm to 1.2 mm, and particularly up to 0.8 mm. E1 And it has a maximum depth in the radial direction, which is at least the tread depth T. P ( Figure 4 Subtract 2.5mm, with the maximum being the tread depth T. P 100%, preferably the maximum tread depth T P Subtract 1.0mm.

[0090] The groove 10 is formed between two grooves 9, wherein the number of grooves 9 and 10 in the tread block 2 on the corresponding shoulder side is odd (see [reference]). Figure 1Segment M) is the intermediate groove, and when the number of grooves 9 and 10 in the corresponding shoulder side tread block 2 is even (see especially... Figure 2 Segment S and Figure 1 The segment L) is one of the two intermediate grooves. When the number of grooves 9 and 10 is even, groove 10 is preferably the intermediate groove closer to the rolled-out block edge 7 of the two intermediate grooves. Figure 2 ).

[0091] The groove 10 has a symmetry plane E1 oriented in the radial direction and extending at an angle ε in the top view, and a length l derived in the bottom support surface, projected in the axial direction with reference to the symmetry plane E1. E Two opposing groove walls 11 extending radially, and a groove bottom 12 ( Figure 4 In the top view, the groove 10 consists of a main groove section 10a located within the bottom support surface (see...). Figure 4 It consists of two groove edge sections 10b. Viewed in the top view, the main groove section 10a has a length l projected axially toward the plane of symmetry E1. a2 This length is the length l of the groove 10. E The grooving width is 60% to 90%, particularly 65% ​​to 85%, and the main grooving section is provided with two locally deepened and locally widened grooving main grooving sections 10a. The grooving 10 has a constant width b of 0.4 mm to 1.2 mm, particularly up to 0.8 mm, in the area outside the grooving pockets 13. E2 (see Figure 5 ).according to Figure 4 The main grooving section 10a has a maximum depth t in the radial direction in the region outside the grooving pocket 13. E The maximum depth is at least the tread depth T. P Subtract 2.5mm, and the maximum is the tread depth T. P Subtract 0.5mm, the optimal maximum is the tread depth T. P Subtract 1.0 mm, wherein the bottom 12 of the groove in the main groove section 10a extends parallel to the outer surface 2b of the block.

[0092] like Figure 2 and Figure 6 As shown in the combined configuration, according to the symmetrical embodiment of the slot 10, the slot pocket 13 is also symmetrical with respect to the aforementioned plane of symmetry E1, and each slot pocket has a plane of symmetry E2 oriented in the radial direction and extending perpendicular to the plane of symmetry E1 in the top view. Figure 2 , Figure 4 The groove pocket starts from the outer surface 2b of the block (see...). Figure 4 And in the top view ( Figure 2They are respectively elongated into the shape of rectangles with rounded corners along the extension direction of the plane of symmetry E1, and are implemented as U-shaped when viewed in a section perpendicular to the plane of symmetry E1. Figure 6 Each slotted pocket 13 consists of a recess 14 formed on a slotted wall 11 (see...). Figure 4 The groove 13 and the recess 14 formed on the opposite groove wall 11 constitute a groove pocket 13 and thus a recess 14, wherein the groove pocket 13 and the recess 14 terminate radially at the bottom 12 of the groove (= maximum depth t) in the radial direction. E Within the horizontal plane and radially terminating at tread depth T P Horizontal outside ( Figure 4 ).according to Figure 4 When viewed toward the corresponding groove wall 11, each recess 14 is trapezoidal or rectangular in the illustrated embodiment, and each recess has a bottom 14a (see...). Figure 6 ) and side wing surfaces 14b, which are located on different sides of the plane of symmetry E2, extend between the bottom 14a and the slotted wall 11, and in the embodiment form trapezoidal legs. Viewed in a section perpendicular to the plane of symmetry E1, the bottom 14a extends in the radial direction ( Figure 6 Alternatively, it extends at an angle of up to 2° relative to the radial direction. When viewed toward the corresponding groove wall 11, the side wing 14b extends at an angle θ of 0° to 6° relative to the radial direction, wherein, when the angle θ is not 0°, the width of the trapezoidal shape of the recess 14 between its side wing 14b continuously widens in the direction toward the outer surface 2b of the block.

[0093] according to Figure 6 Observed in a section perpendicular to the plane of symmetry E1 (see...) Figure 2 (The position of section line VI-VI in the middle), each slotted pocket 13 passes through the bottom 14a of the opposite recess 14 ( Figure 2 , Figure 4 (These U-shaped legs, forming the aforementioned U-shaped groove pocket 13 at the bottom,) and the arc-shaped pocket bottom 13a extending between the bottoms 14a, are used for demarcation. Figure 4 As shown, the bottom 13a of the pocket lies within the plane of symmetry E1 (see...). Figure 2 The midsection line IV-IV extends to a constant depth derived in the radial direction. Viewed in a section along the plane of symmetry E1, the bottom of the pocket 13a can be located at depth t. E Horizontal position, tread depth T P The bottom of the pocket 13a is located at the horizontal level or, as in the embodiment, between these levels. If the bottom of the pocket 13a is located between these levels, it is preferable that, in the plane of symmetry E1, the bottom of the pocket is at the same level as the depth t. EThe horizontal spacing has a distance a1 of 0.5 mm to 1.5 mm in the radial direction and / or is related to the tread depth T. P The horizontal plane has a spacing a2 of 0.5 mm to 2.5 mm, especially 1.0 mm to 2.0 mm, particularly preferably 1.5 mm, in the radial direction.

[0094] The grooved pocket 13 has a perpendicular plane of symmetry E1 between the bottom 14a of its recess 14 (see...). Figure 2 Furthermore, the width b around the tread ranges from 1.5mm to 4.0mm, and especially reaches up to 3.5mm. T ( Figure 3 Preferably, the width b of the groove 10 E2 ( Figure 2 , Figure 3 ) and the width b of the groove pocket 13 T To be coordinated, so that the width b T For width b E2 The percentages range from 200% to 600%, and especially up to 500%. In the illustrated embodiment, the greater the length of the subordinate segments S, M, L, the greater the width b of the slot pocket 13. T The larger the value, the greater the width b of the groove pocket 13. T In segment S, the difference is particularly 1.8 mm to 2.2 mm; in segment M, the difference is particularly 2.3 mm to 2.7 mm; and in segment L, the difference is particularly 2.8 mm to 3.2 mm.

[0095] Viewed from the top, the two notches 13 together occupy the length l of the notch 10 projected in the axial direction. E ( Figure 2 40% to 70%, especially 45% to 60%. According to Figure 2 The groove pockets 13, viewed in a top view and with reference to the plane of symmetry E1, have a first distance a3 between them projecting in the axial direction. Furthermore, the groove pockets 13 further out on the tread have a second distance a3 with the lateral edge (line l) of the bottom support surface, derived in a similar manner. The groove pockets 13 further in on the tread have a third distance a3 with the inner end of the groove 10 on the tread, derived in a similar manner. The distances a3 may be the same or different from each other, wherein each distance a3 is at least 3.0 mm.

[0096] The present invention is not limited to the described embodiments.

[0097] The grooves 9 and 10 can also extend in a curved manner in the top view, wherein the angle ε in such grooves 9 and 10 is related to the straight line connecting the ends of the center line of the groove in the top view. Furthermore, the grooves 9 and 10 can extend in a segmented, wavy manner, particularly in the form of a meandering wave, a sawtooth wave, or a "rounded" wave (e.g., a sine wave). The groove 10 has at least one groove pocket 13 and can have, in particular, up to three groove pockets 13, wherein the shape of the groove pockets(s)(s)13 can differ from the shape described.

[0098] In a top view, oblique grooves can extend straight or continuously curved. In the case of straight oblique grooves, the apex angles δ, δ', and angle α are all perpendicular to the centerline m. SR Related.

[0099] The grooves extending between the diagonal grooves, especially the grooves of the tread blocks adjacent to the tire shoulder, can extend at an angle of 0° to 55° with the circumferential direction.

[0100] The tread can also be made to be free in the direction of rotation (not restricted by the direction of travel), wherein the oblique grooves extend particularly in each half of the tread, and wherein the oblique grooves extending in one half of the tread and the oblique grooves extending in the other half of the tread are inclined in the same direction about the circumferential direction, thereby giving the tread an S-shaped arched pattern.

Claims

1. A vehicle pneumatic tire having a tread having a row of tread blocks (1) on the shoulder side with tread blocks (2) and extending to a tread depth (T). P The oblique grooves (4) have oblique groove sections (4b) on the shoulder side that separate the tread blocks (2) on the shoulder side from each other and extend at an angle (β) of 0° to 15° relative to the axial direction in a top view, wherein, Each of the tread blocks (2) on the shoulder side has a certain number of first grooves (9), which in the top view are at an angle (ε) of 0° to 15° relative to the axial direction and extend parallel to each other and parallel to the groove section (4b) on the shoulder side, having a constant width (b) of 0.4 mm to 1.2 mm. E1 ), wherein, a tread block (2) is provided on the shoulder side, each having a unique additional groove (10), the additional groove being formed between two first grooves (9) and extending parallel to the two first grooves in a top view, wherein the first groove (9) and the additional groove (10) each have a groove wall (11) and at least equivalent to the tread depth (T). P Subtract the maximum depth of 2.5 mm (t) E ), Its features are, The additional groove (10) extends transversely through the tread block (2) on the shoulder side within the bottom support surface and has at least one groove pocket (13), the groove pocket extending radially from the periphery of the tread to at least the maximum depth (t) of the additional groove. E The slotted pocket is formed by a recess (14) located at one slotted wall (11) and a recess (14) located at another slotted wall (11), wherein the additional slot (10) has a width of 0.4 mm to 1.2 mm outside the slotted pocket / multiple slotted pockets (13). E2 ).

2. The vehicle pneumatic tire according to claim 1, characterized in that, The additional slot (10) is one of two intermediate slots (10) when the number of slots (9, 10) is even and is an intermediate slot (10) when the number of slots (9, 10) is odd.

3. The vehicle pneumatic tire according to claim 1 or 2, characterized in that, Viewed from the top, the slotted pocket / multiple slotted pockets (13) occupy the length (l) of the additional slot (10) projected axially within the bottom support surface. E 40% to 70% of ).

4. The vehicle pneumatic tire according to claim 3, characterized in that, Viewed from the top, the slotted pocket / multiple slotted pockets (13) occupy the length (l) of the additional slot (10) projected axially within the bottom support surface. E 45% to 60%.

5. The vehicle pneumatic tire according to claim 1, characterized in that, Viewed in a top view, the slotted pocket / multiple slotted pockets (13) have a radially extending plane of symmetry (E1) oriented along the longitudinal extension dimension of the additional slot (10), wherein, viewed in a section perpendicular to the plane of symmetry (E1), the slotted pocket / multiple slotted pockets (13) have a width (b) of 1.5 mm to 4.0 mm at the tread periphery. T ).

6. The vehicle pneumatic tire according to claim 5, characterized in that, Viewed in a section perpendicular to the plane of symmetry (E1), the notch / multiple notches (13) have a width of up to 3.5 mm at the periphery of the tread (b T ).

7. The vehicle pneumatic tire according to claim 5, characterized in that, The width (b) of the grooved pocket / multiple grooved pockets (13) T ) is the width (b) of the additional groove (10). E2 200% to 600%.

8. The vehicle pneumatic tire according to claim 7, characterized in that, The width (b) of the grooved pocket / multiple grooved pockets (13) T ) is the width (b) of the additional groove (10). E2 The percentage is as high as 500%.

9. The vehicle pneumatic tire according to claim 5, characterized in that, The slotted pockets / multiple slotted pockets (13) are defined in the radial direction by a pocket bottom or each pocket bottom (13a), the pocket bottoms extending in the plane of symmetry (E1) to a constant depth derived in the radial direction and located at the maximum depth (t). E At the horizontal level, the tread depth (T) P (at or between these levels) 10. The vehicle pneumatic tire according to claim 9, characterized in that, In the plane of symmetry (E1), the bottom of the pocket (13a) and the maximum depth (t) are obtained. E The horizontal spacing (a1) is 0.5 mm to 1.5 mm in the radial direction, and / or is related to the tread depth (T). P The horizontal plane has a spacing of 0.5 mm to 2.5 mm in the radial direction (a2).

11. The vehicle pneumatic tire according to claim 10, characterized in that, The bottom of the pocket (13a) and the tread depth (T) P The horizontal plane has a spacing of 1.0 mm to 2.0 mm in the radial direction (a2).

12. The vehicle pneumatic tire according to claim 10, characterized in that, The bottom of the pocket (13a) and the tread depth (T) P The horizontal plane has a spacing (a2) of 1.5 mm in the radial direction.

13. The vehicle pneumatic tire according to claim 5, characterized in that, The additional groove (10) is provided with exactly two groove pockets (13), which, when viewed in a top view and with reference to the plane of symmetry (E1), have a first distance (a3) ​​between them projected in the axial direction. The groove pocket (13) further out of the tread has a second distance (a3) ​​projected in the axial direction to the lateral edge (line l) of the bottom support surface, and the groove pocket (13) further in the tread has a third distance (a3) ​​projected in the axial direction to the end of the groove (10) on the inner side of the tread. The first distance (a3), the second distance (a3), and the third distance (a3) ​​are each at least 3.0 mm.

14. The vehicle pneumatic tire according to claim 5, characterized in that, The slotted pocket / multiple slotted pockets (13) have a rectangular shape that extends in the direction of the plane of symmetry (E1) in the top view, and the recess (14) is implemented in a trapezoidal or rectangular shape when viewed toward the corresponding slotted wall (11).

15. The vehicle pneumatic tire according to claim 1, characterized in that, Viewed from the top, the additional groove (10) is formed by reaching the maximum depth (t). E The grooving main section (10a) consists of two grooving edge sections (10b) that are shallower than the grooving main section, wherein the grooving main section (10a) has a length (l) projected in the axial direction. a2 The length is the length of the additional cut (10) projected in the axial direction within the bottom support surface (l). E 60% to 90%.

16. The vehicle pneumatic tire according to claim 1, characterized in that, The tread is configured to be restricted by the direction of travel and have V-shaped grooves (4) extending into each other in the tread width, wherein, in each tread half, grooves (5) of tread blocks (2) that are inclined in the opposite direction to the grooves (4) in the top view and jointly demarcate the shoulder side extend between adjacent grooves (4) in the circumferential direction.

17. The vehicle pneumatic tire according to claim 16, characterized in that, The groove (5) extends straight in the top view and has an inward groove end (5a) that first enters the ground when the tire rolls forward (arrow R), and an outward groove end (5b), wherein the extension of one groove (5) extends beyond the groove centerline (m) of the outward groove end (5b). N ) and the groove center line (m) of the corresponding oblique groove (4) SR ) forming opposite apex angles (δ) of 80° to 120° in the axial direction.

18. The vehicle pneumatic tire according to claim 17, characterized in that, An extension of a groove (5) beyond the center line (m) of the groove at the end (5b) of the rolled-out groove. N ) and the groove center line (m) of the corresponding oblique groove (4) SR ) forming opposite apex angles (δ) of 90° to 110° in the axial direction.

19. The vehicle pneumatic tire according to claim 16 or 17, characterized in that, The groove (5) extends at an angle (γ) of 15° to 55° relative to the circumferential direction.

20. The vehicle pneumatic tire according to claim 19, characterized in that, The groove (5) extends at an angle (γ) of 25° to 45° relative to the circumferential direction.

21. The vehicle pneumatic tire according to claim 16, characterized in that, Each of the tread blocks (2) on the shoulder side has an inward edge (6) and an outward edge (7), wherein the tread blocks (2) on the shoulder side are provided with an even number of grooves (9, 10), wherein the additional groove (10) is an intermediate groove (9, 10) closer to the outward edge (7).

22. The vehicle pneumatic tire according to claim 1, characterized in that, The tread blocks (2) on the shoulder side of the tire are provided with five to nine grooves (9, 10).

23. The vehicle pneumatic tire according to claim 22, characterized in that, The tread blocks (2) on the shoulder side of the tire are provided with six to eight grooves (9, 10).

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