Vehicle tires

Abstract

The invention relates to a vehicle tire with a tread having a row of profile blocks (1', 2') with profile blocks (1, 2) which have at least one acute-angled block corner region (1f, 2f) on which each has a grip structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) is trained, where the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) - in top view an acute-angled receiving triangle (D) with a between block edge ends (K E ) running, first side of the triangle (D B ) occupies as well as - two radially inner boundary edges (K) meeting at this point and located on the block flanks (1g, 2g, 3g). i ) exhibits. The radially inner boundary edges (K i ) form the two other sides of the triangle (D B ) of the recording triangle (D), where the handle structure (9, 9 I 9 II 9 III 9 IV , g V 9 VI ) a triangular top surface (12) and on this a radially outer point (S a ) as well as two at the radially outer tip (S a ) converging, each forming one side of the triangle of the top surface (12), radially outer boundary edges (K a ) exhibits.

Description

[0001] The invention relates to a vehicle tire with a tread having at least one row of profile blocks, which is structured into profile blocks by transverse grooves, wherein a circumferential groove bounding all profile blocks or several short grooves bounding one or more of the profile blocks runs axially laterally on at least one side of the row of profile blocks. wherein the profile blocks each have a block outer surface, block edges along the adjacent grooves and at least one acute-angled block corner area, wherein acute-angled block corner areas are provided, on which a grip structure is formed between the adjacent grooves, which recesses the block corner of the respective profile block, on which the block edges each have a block edge end, the handle structure - in top view, it occupies an acute-angled triangular position with a first side of the triangle running between the ends of the block edges and - a radially inner point corresponding to its lowest point in the radial direction, opposite the first side of the triangle in plan view, as well as - has two radially inner boundary edges that meet at this point and lie on the block flanks.

[0002] Such a vehicle tire is known, for example, from DE 10 2021 209 457 A1. The vehicle tire has a tread with a row of tread blocks, the blocks having acute-angled corner areas. These blocks include those that each have a triangular grip structure (when viewed from above) that slopes radially in a step-like manner from the outer surface of the block. This grip structure improves snow performance while maintaining uniform wear of the tread blocks.

[0003] For vehicle tires of the type mentioned above, there are currently ongoing efforts to further improve winter performance, which primarily includes traction and braking characteristics on snow and / or ice, with a particular focus on optimizing winter performance "over lifetime", i.e., winter performance affected by the wear pattern of the tread blocks.

[0004] The invention is therefore based on the objective of further improving the winter performance, in particular the winter performance "over lifetime", of a vehicle tire of the type mentioned above.

[0005] The problem is solved according to the invention by, that the radially inner boundary edges form the two other sides of the receiving triangle, wherein the handle structure has a triangular top surface adjoining the block's outer surface via the first triangular side of the receiving triangle and, in plan view, a radially outer point and two radially outer boundary edges meeting at the radially outer point, each forming a triangular side of the top surface, wherein the radially outer boundary edges meet the radially inner boundary edges at the block edge ends and wherein the top surface is enclosed in a V-shape by a partial surface of the receiving triangle which is also bounded by the radially inner boundary edges and together with this occupies the receiving triangle.

[0006] This type of grip structure is characterized by two radially outer boundary edges meeting at a radially outer point and two radially inner boundary edges adjoining these, meeting at a radially inner point. The pressure exerted by the boundary edges on the surface is increased by and over these points during driving, causing the boundary edges to engage more deeply with the snow and thus elevating snow performance to a higher level. Simultaneously, the top-view shape of the grip structure, consisting of inscribed or nested triangles, provides particularly pronounced stabilization of the acute-angled block corner areas, making them less susceptible to abrasion, maintaining a large contact area between the tread and the surface, and thus improving ice performance over the lifetime of the tire.In this context, the larger inclusion angle of the radial outer boundary edges, resulting from the V-shaped edging of the top surface, is advantageous compared to the inclusion angle of the radial inner boundary edges.

[0007] According to a first preferred embodiment, the grip structure has a single plane of symmetry, which runs radially and, viewed from above, through the radially inner tip and the radially outer tip. This contributes to a particularly uniform wear of the grip structure and the acute-angled block corner area, which is advantageous for winter performance over the lifetime of the grip.

[0008] According to another preferred embodiment, the radially outer boundary edges, viewed from above, enclose an angle of 45° to 110°, in particular 55° to 90°. This ensures particularly good snow grip.

[0009] According to a further preferred embodiment, the block edges, viewed from above and with respect to a fictitious edge intersection point resulting from a straight extension of the block edges, enclose an angle of 30° to 80°, in particular 35° to 70°, preferably up to 65°, particularly preferably up to 55°, and most preferably up to 45° at the acute-angled block corner region. Such an angle contributes to a particularly favorable balance between snow penetration and abrasion behavior, thereby further improving winter performance over lifetime.

[0010] A preferred further development of the two aforementioned designs consists in the angle enclosed by the radially outer boundary edges being at least 5°, in particular at least 10°, preferably at least 13°, and most preferably at least 15°, greater than the angle enclosed by the block edges at the acute-angled block corner area. This contributes to a particularly advantageous compromise between the snow grip of the radially outer boundary edges and the stabilization provided by the radially inner boundary edges, which is important for uniform wear and acts on the acute-angled block corner area. The winter performance over lifetime is thus further improved.

[0011] Another preferred embodiment provides that the radially inner tip of the grip structure lies at a depth of 30% to 65%, particularly 35% to 60%, of the tread depth relative to the level of the block's outer surface in the radial direction. The described advantageous effects are therefore maintained throughout the tread wear.

[0012] According to a further preferred embodiment, the handle structure, viewed from above, has a maximum length of 15.0 mm to 30.0 mm, in particular 20.0 mm to 25.0 mm, measured perpendicular to the first side of the triangle. Such a handle structure is particularly effective.

[0013] In the latter preferred embodiment, it is additionally advantageous if the top surface of the grip structure, viewed from above, has a length, determined perpendicular to the triangular base, of 30% to 60%, and in particular at least 50%, of the maximum length of the grip structure. This promotes a particularly favorable balance between the grip's engagement on snow and the support effect of the grip structure, which is beneficial for uniform abrasion.

[0014] According to a further preferred embodiment, the grip structure has a projection which is bounded in the radial direction by the top surface of the grip structure and by two side surfaces adjoining the top surface via the radially outer boundary edges. Such a projection allows the pressure exerted on the surface via the radially outer boundary edges to be further increased, thus further improving the grip on snow.

[0015] The following section discusses various versions of the aforementioned preferred design.

[0016] With regard to the support effect, which is advantageous for winter performance over lifetime, it is beneficial if, according to a first variant, the partial surface of the receiving triangle, which surrounds the cover surface in a V-shape, is a flat, arrowhead-shaped base surface of the grip structure, from which the projection rises in a radial direction and which, viewed in cross-sections that are oriented perpendicular to the base of the triangle in a top view, runs at a constant angle to the radial direction and slopes radially inwards from the projection to the radially inner tip.

[0017] According to a second variant, the portion of the receiving triangle that frames the top surface in a V-shape is a continuously outwardly curved, arrowhead-shaped base surface of the grip structure. Viewed in cross-sections perpendicular to the triangle's base, this base surface curves continuously outwards and slopes radially inwards from the projection to the radially inner tip. This is particularly advantageous for uniform wear characteristics.

[0018] According to a third variant, the portion of the grip triangle that forms a V-shape around the top surface is formed by an arrowhead-shaped base surface of the grip structure (in plan view) and an arrowhead-shaped projection extending radially from it. The base surface, in plan view, together forms a V-shape around the projection and the main projection, and vice versa. Thus, viewed from above, the base surface and the projection together form the portion of the grip triangle. The additional projection provides extra gripping edges and is therefore beneficial for winter performance.

[0019] According to a further preferred embodiment, the grip structure is bounded by the top surface and two continuously inwardly curved side surfaces, wherein the side surfaces each extend between one of the radially outer boundary edges and one of the radially inner boundary edges and connect to each other via a continuously circular arc-shaped, radially inwardly curved boundary edge extending between the radially outer tip and the radially inner tip, such that, viewed from above, the side surfaces together form the partial surface of the receiving triangle. This embodiment is particularly advantageous with regard to uniform abrasion and therefore for winter performance over its lifetime.

[0020] For uniform abrasion, it is preferred if the top surface of the grip structure is level with the outer surface of the block and therefore runs in the periphery of the tread.

[0021] For the snow grip, it is particularly preferred if the top surface of the grip structure, viewed in cross-sections that are oriented perpendicular to the base of the triangle in plan view, is inclined in the radial direction and additionally runs straight, continuously radially inwards or continuously radially outwards, wherein the inclination in the case of a continuously curved top surface refers to a straight auxiliary line running between the ends of the top surface.

[0022] Further features, advantages, and details of the invention will now be described in more detail with reference to the drawing, which schematically illustrates exemplary embodiments of the invention. These show Fig. 1 a simplified top view of one half of a development of a circumferential section of a tread of a vehicle pneumatic tire with a first embodiment of the invention, Fig. 2 an enlarged top view of detail Z2 of the Fig. 1, Fig. 3 a front view according to the in Fig. 2. Direction of view indicated by arrow S3, Fig. 4. A side view according to the in Fig. 2. Direction of view indicated by arrow S4, Fig. 5 a reduced section along line VV of the Fig. 2, Fig. 6 a perspective section along line VI-VI of the Fig. 2, Fig. 7 a cut along line VII-VII of the Fig. 2, Fig. 8 an enlarged section along line VIII-VIII of the Fig. 2, Fig. 9 an oblique view of a block corner area with a second embodiment of the invention, Fig. 10 an oblique view of a block corner area with a third embodiment of the invention, Fig. 11 an oblique view of a block corner area with a fourth embodiment of the invention, Fig. 12 an oblique view of a block corner area with a fifth embodiment of the invention, Fig. 13 an oblique view of a block corner area with a sixth embodiment of the invention and Fig. 14 an oblique view of a block corner area with a seventh embodiment of the invention.

[0023] According to the invention, vehicle tires are tires for motor vehicles, in particular for multi-track motor vehicles, preferably for passenger cars, vans, or SUVs, and preferably pneumatic tires, especially radial pneumatic tires. Passenger car, van, and SUV tires are intended in particular for rims with an integer rim diameter of 13 inches to 24 inches, preferably from 18 inches to 23 inches, and have a load index of, in particular, 71 to 126.

[0024] Fig. Figure 1 shows a top view of a circumferential section of one half of a tread of a vehicle tire, which is a car, van, or SUV tire, unfolded into a plane. The tire's equatorial plane is indicated by line AA. The tread has a directional profile, and the vehicle tire is to be mounted on a vehicle such that it has the rolling direction indicated by arrow R when driving forward. The tread half, not shown, is preferably designed such that, viewed from a top view, one tread half can be mapped, i.e., transformed, onto the other tread half by reflection across the tire's equatorial plane (line AA) and additional translation in the circumferential direction.

[0025] The tread has in the tread half shown an axially lateral to and adjacent to the tire equatorial plane (line AA), central tread block row 1', a semi-central tread block row 2' and a shoulder-side tread block row 3', is noise-optimized according to a pitch length variation method and in the circumferential section of the tread half shown consists of a pitch P1 and a pitch P2.

[0026] The profile block row 1', 2', 3' has successive central profile blocks 1 (central profile block row 1') or semi-central profile blocks 2 (semi-central profile block row 2') or shoulder-side profile blocks 3 (shoulder-side profile block row 3') in the circumferential direction, wherein the profile blocks 1, 2, 3 within the associated profile block row 1', 2', 3' are separated from each other by central transverse grooves 4 (central profile block row 1') or semi-central transverse grooves 5 (semi-central profile block row 2') or shoulder-side transverse grooves 6 (shoulder-side profile block row 3') and wherein the transverse grooves 4, 5, 6 connect to each other and run along the pitch boundaries not shown, such that each pitch P1, P2 comprises a central profile block 1, a semi-central profile block 2 and a shoulder-side profile block 3.

[0027] Within each pitch P1, P2, the respective semi-central profile block 2 is separated from the central profile block 1 by a short groove 7 on the inside of the tread and from the shoulder-side profile block 3 by a short groove 8 on the outside of the tread, wherein the short groove 7 on the inside of the tread runs between a central transverse groove 4 and a semi-central transverse groove 5 and wherein the short groove 8 on the outside of the tread runs between the mutual connection areas of the semi-central transverse grooves 5 and shoulder-side transverse grooves 6.

[0028] Each short groove 7 on the inner side of the tread is bounded at the tread periphery by a lateral block edge 1a formed on the adjacent central profile block 1 and a lateral block edge 2a formed on the inner side of the tread, formed on the adjacent semi-central profile block 2. Each short groove 8 on the outer side of the tread is bounded at the tread periphery by a lateral block edge 2a' formed on the outer side of the tread, formed on the adjacent semi-central profile block 2 and a lateral block edge 3a formed on the adjacent shoulder-side profile block 3. Viewed from above, the lateral block edges 1a, 2a, 2a', and 3a are all straight. The short grooves 7, 8 each have a straight groove centerline m located at the periphery of the tread, spaced in plan view in accordance with the adjacent lateral block edges 1a, 2a (short groove 7), 2a', 3a (short groove 8). KRon, run - relative to the groove centerline m KR - to the circumferential direction at an angle α (short groove 7), β (short groove 8) of 3° to 25°, in particular of 5° to 20°, wherein the short grooves 7, 8 run inclined to the circumferential direction such that their incoming groove centerline end m, which first enters the surface when the tire rolls during forward travel KR1 closer to the tire equatorial plane (line AA) than its tapered groove centerline end m KR2 . A space between the incoming groove centerline end m KR1 and the distance determined in the axial direction to the tire equatorial plane (line AA) is therefore smaller than the distance between the trailing groove centerline end m KR2 and the distance determined axially from the tire equatorial plane (line AA). In the exemplary embodiment, the short grooves 7, 8 are radially aligned to the respective intended tread depth T. P ( Fig. 5: Shown for short groove 7), which is typically 6.5 mm to 13.5 mm for the preferred tire type (passenger car, van, SUV), and have a profile perpendicular to the groove centerline m when viewed from above. KR as well as the width b determined between the respective block edges 1a, 2a (short groove 7), 2a', 3a (short groove 8). KR from 1.0 mm to 15.0 mm, in particular from 2.5 mm to 10.0 mm, preferably from 3.0 mm to 7.0 mm, wherein the width b KR either is constant or – as shown in the exemplary embodiment – ​​continuously, in particular by up to 3.0 mm from the incoming groove centerline end m KR1 to the tapered end of the groove centerline m KR2 increases.

[0029] Each transverse groove 4, 5, 6 is bounded at the periphery of the tread by an incoming block edge 1b (profile block 1), 2b (profile block 2), 3b (profile block 3) formed on one adjacent profile block 1 (central transverse groove 4), 2 (semi-central transverse groove 5), 3 (shoulder-side transverse groove 6) and an outgoing block edge 1c (profile block 1), 2c (profile block 2), 3c (profile block 3) formed on the other adjacent profile block 1 (central transverse groove 4), 2 (semi-central transverse groove 5), 3 (shoulder-side transverse groove 6). The incoming block edge 1b, 2b, 3b enters the ground before the outgoing block edge 1c, 2c, 3c when the vehicle tire rolls forward (arrow R) – in each case with respect to a profile block 1, 2, 3. Viewed from above, the block edges 1b, 1c, 2b, 2c, 3b, 3c each run straight.The transverse grooves 4, 5, 6 each have a straight groove centerline m located at the periphery of the tread, spaced in plan view in accordance with the adjacent block edges 1b, 1c (transverse groove 4), 2b, 2c (transverse groove 5), 3b, 3c (transverse groove 6). QR on, run - relative to the groove centerline m QR - to the axial direction at an angle γ (transverse groove 4), δ (transverse groove 5), ε (transverse groove 6) of 0° to 25°, in particular of at least 3°, wherein the angle δ is preferably at least 5° greater than the angle γ and, in the exemplary embodiment, is furthermore at least 5° greater than the angle ε, and wherein the transverse grooves 4, 5, 6 are inclined to the circumferential direction such that they each form an incoming groove centerline end m on the inner side of the tread, which enters the surface first when the tire rolls during forward travel. QR1 and a tapered groove centerline end on the outer side of the tread. QR2exhibit. Alternatively, it is preferred if the angle γ is, in particular, at least 5° larger than the angle δ. In the exemplary embodiment, the transverse grooves 4, 5, 6 are radially aligned to the profile depth T already mentioned. P ( Fig. 5: Shown only for short groove 7) executed and exhibit a top view perpendicular to the groove centerline m QR as well as the width b determined between the respective block edges 1b, 1c (transverse groove 4), 2b, 2c (transverse groove 5), 3b, 3c (transverse groove 6). QR from 2.0 mm to 15.0 mm, in particular from 2.5 mm to 10.0 mm, wherein the width b QR in the exemplary embodiment it is constant, alternatively it can also vary over the extent of the transverse grooves 4, 5, 6, whereby it decreases continuously in each transverse groove 4, 5, 6, particularly in the direction towards the edge of the tread.

[0030] The profile blocks 1, 2, 3 each have an outer block surface 1d (profile blocks 1), 2d (semi-central profile blocks 2), 3d (shoulder-side profile blocks 3) located at the periphery of the tread, which is bounded by the associated block edges 1a, 1b, 1c or 2a, 2a', 2b, 2c or 3a, 3b, 3c respectively, and each has block flanks 1g (profile block 1), 2g (profile block 2), 3g (profile block 3) extending from one of the block edges 1a, 1b, 1c, 2a, 2a', 2b, 2c, 3a, 3b, 3c, which are perpendicular in plan view to the associated block edge 1a, 1b, 1c, 2a, 2a', 2b, 2c, 3a, 3b, 3c. 3a, 3b, 3c cross-section considered, straight as well as to the radial direction at an angle θ ( Fig. 7, shown for a block flank 2g) from 0° to 15°, in particular from 4° to 6°.

[0031] The profile blocks 1, 2, 3 can be provided with incisions executed in a manner known per se.

[0032] Each central profile block 1, viewed from above, has, due to the described profiling, an obtuse-angled block corner area 1e at the intersection of the adjacent grooves 4, 5, 7 and an acute-angled block corner area 1f that enters the ground last when the tire rolls.Each semi-central profile block 2, viewed from above, has an elongated parallelogram shape in the axial direction, more precisely along the semi-central transverse grooves 5, due to the described profiling, and has two diagonally opposite, obtuse-angled block corner areas 2e and two diagonally opposite, acute-angled block corner areas 2f at the intersection areas of the adjacent grooves 4, 5, 7, 8 - namely, an incoming, acute-angled block corner area 2f that enters the ground first when the tire rolls during forward travel (arrow R) of all block corner areas 2e, 2f, and a trailing, acute-angled block corner area 2f.

[0033] At each acute-angled block corner area 1f, 2f, the short groove 7 or 8 closes with the respective central transverse groove 4 or the respective semi-central transverse groove 5 - viewed in plan view and with respect to the associated groove center lines m KR, m QR - an acute angle η' determined via the acute-angled block corner area 1f, 2f (only noted for the incoming acute-angled block corner area 2f, cf. Fig. 2) By analogy, the incoming or outgoing block edge 1c, 2b, 2c encloses with the respective lateral block edge 1a, 2a, 2a', viewed from above and with respect to a fictitious edge intersection point S K (see Fig. 2: Shown for the incoming, acute-angled block corner area 2f) of the two respective block edges 1a, 2a, 2a', 1c, 2b, 2c, an acute angle η a ( Fig. 2), wherein the profiling is such that the acute angle η is 30° to 80°, in particular 35° to 70°, preferably up to 65°, particularly preferably up to 55°, most preferably up to 45°. The fictitious edge intersection point S K results from the straight extension of the respective block edges 1a, 2a, 2a', 1c, 2b, 2c in a top view.

[0034] According to Fig. 1 Each acute-angled block corner area 1f, 2f is provided with a grip structure 9 extending to the grooves 4, 5 (transverse groove 4, 5), 7, 8 (short groove 7, 8) adjacent to the block corner area 1f, 2f, which omits the block corner that would otherwise lie at the periphery of the tread strip and on which the block edges 1a, 1c, 2a, 2a', 2b, 2c each have a block edge end K E (cf. Fig. 2: Shown for block edges 2a, 2b). The further development of the grip structure 9 is described below with reference to the grip structure 9 located on an inward-facing, acute-angled block corner area 2f, which is in Fig. 2 to Fig. As shown in section 7, it is explained.

[0035] According to Fig. 2 and Fig. 3 The handle structure 9 has a radially extending ( Fig. 3), bisecting the angle η in top view ( Fig. 2) The plane of symmetry E1 appears and takes on - as Fig. Figure 2 shows - viewed from above - an isosceles acute-angled receiving triangle D (indicated by dots) with a space between block edge ends K E extending triangle base D B and two triangular legs D lying on the adjacent grooves 5, 7 S one. As will be explained in more detail later, the handle structure 9 has two radially outer boundary edges K. a , two radially inner boundary edges K i , a radially outer tip S lying in the plane of symmetry E1 a and a radially inner tip S lying in the plane of symmetry E1 i on.

[0036] How Fig. 2 to Fig. 6, especially in combination with each other, shows that the handle structure 9 consists of a projection 10, which has the shape of a triangular pyramid ( Fig. 3 in conjunction Fig. 6) and one adjacent to the radially inner end of the projection 10, in plan view ( Fig. 2) arrowhead-shaped base surface 11 formed, so that the projection 10 rises radially from the level of the base surface 11 ( Fig. 3 to Fig. 6).

[0037] According to Fig. 2 The handle structure 9 has a top view in the plane of symmetry E1 and is therefore perpendicular to the triangle base D B determined maximum length c GS (Length at the longest point) from 15.0 mm to 30.0 mm, in particular from 20.0 mm to 25.0 mm, and one perpendicular in plan view to the plane of symmetry E1 and along the triangle base D B determined, smaller than the maximum length c GS executed, maximum width b GS on, whose size is determined by the aforementioned angle η and the maximum length c GS follows.

[0038] The base area 11, viewed from above, forms a sub-area of ​​the receiving triangle D ( Fig. 2), wherein the base surface 11, i.e. the sub-surface, the projection 10, in top view ( Fig. 2) and in front view ( Fig. 3) with viewing direction along the plane of symmetry E1 (cf. arrow S3 in Fig. 2) considered, V-shaped enclosure and according to Fig. 5 is a flat surface which, in plan view, is perpendicular to the triangle base D B considered in aligned cross-sections (cf. position of line VV in Fig. 2), runs at a constant angle k to the radial direction, the magnitude of which will be discussed later, and extends from the projection 10 to the radially inner tip S i slopes radially inwards. According to Fig. 2 and Fig. 3 is the base surface 11 on the adjacent block flanks 2g of the already mentioned radially inner boundary edges K i limited, which is located at the radially inner tip S i meet, straight as well as at the end of the trestle edge K E the side block edge 2a or to the block edge end K E the incoming block edge 2b run and - how Fig. Figure 2 shows – viewed from above – the two other triangle legs D S form and enclose an angle λ with each other, the size of which will be discussed later. The radially inner tip S i lies the triangle base D B opposite as well as in the plane of symmetry E1 (cf. Fig. 3), corresponds to the lowest point of the handle structure 9 in the radial direction and is located at a depth t determined in the radial direction relative to the level of the block outer surface 2d S ( Fig. 5) of 30% to 65%, in particular of 35% to 60%, of the profile depth T P The size of the aforementioned angle κ ( Fig. 5) results from the length c GS ( Fig. 2) the handle structure 9 and the depth t S ( Fig. 5) the radially inner tip S i The size of the aforementioned angle λ ( Fig. 2) results from the depth t S ( Fig. 5) the radially inner tip Si and the angle η ( Fig. 2).

[0039] How Fig. 2, Fig. 3 and Fig. 6 in combination with each other show that the projection 10 in the radial direction is through a triangle base D B ( Fig. 2, Fig. 6) ending cover surface 12 ( Fig. 2, Fig. 6) and laterally from two triangular side faces 13 ( Fig. 3, Fig. 6), each between the top surface 12 ( Fig. 2, Fig. 6) and the base area 11, are limited.

[0040] According to Fig. 2 and Fig. 6. The cover surface 12 lies in the periphery of the tread and therefore runs at the same level as the outer surface of the block 2d. The cover surface 12 is shown in plan view ( Fig. 2) designed with an acute-angled triangular shape, it is also a cover surface of the handle structure 9 and is defined by the aforementioned radially outer boundary edges K alimited, wherein the radially outer boundary edges K a each form one triangular leg of the top surface 12 and according to Fig. 2, viewed from above, enclose an angle π of 45° to 110°, in particular of 55° to 90°, wherein the angle π is larger than the one already mentioned, from the radially inner boundary edges K i included angle λ and wherein the angle π is larger than the angle η included by the block edges 1c, 2b, 2c. The angle π is in particular at least 5°, preferably at least 10°, more preferably at least 13°, most preferably at least 15°, larger than the angle η.

[0041] According to Fig. 3. The side surfaces 13 close off over the radially outer boundary edges K. a to the top surface 12 as well as via a straight line and between the radially outer tip S aand the boundary edge K, which runs along the base surface 11 and lies in the plane of symmetry E1, abuts each other. How Fig. Figure 5 shows that the boundary edge K runs in the section lying in the plane of symmetry E1 (cf. position of line VV in Fig. 2) to the radial direction at an angle µ of 0° to 10°, in particular up to 7°, preferably up to 5°, in the exemplary embodiment of 0°, wherein the inclination of the boundary edge K at an angle µ deviating from 0° with respect to the radial direction is in the same direction as that of the base surface 11. How Fig. 2 further shows that the top surface 12, viewed in plan view, has a plane of symmetry E1 and is therefore perpendicular to the triangle base D B measured length c DF on, wherein it is preferred if the corresponding dimensions are designed such that the length c DF of the cover area 12 30% to 60%, in particular at least 50%, of the maximum length c GS ( Fig. 2) the handle structure is 9.

[0042] According to Fig. The side surfaces 13 run perpendicular to the associated radially outer boundary edge K in plan view. a considered cross-section (cf. position of line VIII-VIII in Fig. 2) to the radial direction at an angle ρ of 0° to 6°, in particular of 0°.

[0043] Fig. 9 to Fig. Figure 14 shows views of further acute-angled block corner areas 1f with grip structures 9 I 9 II 9 III 9 IV 9 V 9 VI , each of which is an alternative to the handle structure 9 according to the first embodiment ( Fig. 1 to Fig. 8) represent.

[0044] The in Fig. 9 shown handle structure 9 Idiffers from the grip structure 9 in that the top surface 12 of the projection 10 is not located in the periphery of the tread, but, in plan view, perpendicular to the triangular base D B considered in the following cross-sections (not shown, cf. Fig. 2), runs at a constant angle relative to the radial direction that deviates from 90° (not shown in the figures), which is larger, in particular up to 5° larger, than the angle κ (cf. Fig. 5) the base surface 11, wherein the top surface 12 is inclined in the same direction as the base surface 11 with respect to the radial direction. Viewed from above, the base surface 11 also forms a partial surface of the receiving triangle D, which surrounds the projection 10 in a V-shape.

[0045] The in Fig. 10 shown handle structure 9 IIdiffers from the grip structure 9 in that the top surface 12 of the projection 10 is not located in the periphery of the tread, but, in plan view, perpendicular to the triangular base D B considered in the following cross-sections (not shown, cf. Fig. 2), runs at a constant angle relative to the radial direction that deviates from 90° (not shown in the figures), which is larger, in particular up to 5° larger, than the angle k (cf. Fig. 5) the base surface 11, wherein the top surface 12 is inclined in the opposite direction to the base surface 11 with respect to the radial direction, so that the projection 10 is shaped like a ski jump. Viewed from above, the base surface 11 also forms a partial surface of the receiving triangle D, which surrounds the projection 10 in a V-shape.

[0046] The in Fig. 11 shown handle structure 9 III differs from the handle structure 9 I ( Fig. 9) by the fact that the top surface 12 of the projection 10, in plan view perpendicular to the base of the triangle D B considered in the following cross-sections (not shown, cf. Fig. 2), curves continuously outwards and extends from the triangular base D B continuously away from the periphery of the tread. Viewed from above, the base surface 11 continues to form a partial surface of the receiving triangle D, which surrounds the projection 10 in a V-shape.

[0047] The in Fig. 12 shown handle structure 9 IV differs from the handle structure 9 ( Fig. 1 to Fig. 8) by the fact that the base surface 11, in plan view perpendicular to the triangle base D B considered in the following cross-sections (not shown, cf. Fig. 2) curves continuously outwards and, starting from the projection 10, moves continuously away from the periphery of the tread. Viewed from above, the base surface 11 also forms a partial surface of the receiving triangle D, which surrounds the projection 10 in a V-shape.

[0048] The handle structure 9 V in Fig. 13 includes a ramp-like projection 10 analogous to the projection 10 of the grip structure 9 II ( Fig. 10), where the projection 10 of the handle structure 9 V compared to that of the handle structure 9 IIThe device has a smaller volume and furthermore includes an additional projection 14, which – viewed in the radial direction – lies between the projection 10 and the base surface 11 and separates them from each other so that they do not abut each other. Viewed from above, the additional projection 14 is arrowhead-shaped and surrounds the projection 10 in a V-shape. Viewed from above, the base surface 11 surrounds the projection 10 and the additional projection 14 together in a V-shape. Viewed from above, the base surface 11 and the additional projection 14 together form a partial area of ​​the receiving triangle D, which surrounds the projection 10 in a V-shape.

[0049] At the in Fig. 14 shown handle structure 9 VI Neither a base surface 11 nor a projection 10 is present. The grip structure 9 VI is in a radial direction - analogous to the projection 10 of the handle structure 9 (see e.g. Fig.6) - by a triangular top surface 12 located in the periphery of the tread, therefore level with the outer surface of the block 2d, and laterally bounded by two continuously inwardly curved side surfaces 15, which are located between the respective radially outer boundary edge K a and the respective radial inner boundary edge K i run and over a point between the radially outer tip S a and the radial inner tip S i The continuous, radially inwardly curved boundary edge K* connects to one another. Viewed from above, the side surfaces 15 together form a partial surface of the receiving triangle D, which surrounds the top surface 12 in a V-shape.

[0050] The invention is not limited to the described embodiments.

[0051] The tread has at least one row of profile blocks, which includes appropriately designed profile blocks.

[0052] The tread does not need to be directional. The grooves defining the profile blocks can be individually or partially aligned with the intended profile depth T. P be executed. Below the profile depth T P The depth of the deepest groove(s) is understood. The width of the grooves can be constant or vary along their length.

[0053] Instead of short grooves, circumferential grooves can be provided around the entire circumference of the tire. Reference symbol list 1 central profile block 1' central profile block row 1a side block edge 1b inward block edge 1c tapering block edge 1d Block outer surface 1e obtuse-angled block corner area 1f acute-angled block corner area 1g Block flank 2 semi-central profile blocks 2' semi-central profile block row 2a inner running track, lateral block edge 2a' outer tread, lateral block edge 2b inward block edge 2c tapering block edge 2D block outer surface 2e obtuse-angled block corner area 2f acute-angled block corner area 2g block flank 3 shoulder-side profile block 3' shoulder-side profile block row 3a side block edge 3b inward block edge 3c tapered block edge 3D block outer surface 3g Block flank 4 central transverse groove 5 semi-central transverse grooves 6 shoulder-side transverse groove 7 inner tread groove 8 short grooves on the outer side of the tread 9, 9 I 9 II 9 III Handle structure 9 IV 9 V 9 VI Handle structure 10 lead 11 Base area 12 Cover area 13 side surface 14 additional advantage 15 side surface AA line (tire equatorial plane) b GS maximum width b KR , b QR , Width D mounting triangle D B triangle base D S triangle leg c DF length c GS maximum length E1 Plane of symmetry K, K* Boundary edge K a radial outer boundary edge K i radial inner boundary edge K E Block edge end m KR groove center line m KR1 inward groove centerline end m KR2 tapered groove centerline end m QRgroove center line m OR1 inner tread, tapered groove centerline end m QR2 Outer end of the groove centerline on the outside of the tread P1, P2 Pitch R arrow (direction of rolling) S3, S4 arrow (direction of view) S a radial outer tip S i radial inner tip S K fictitious edge intersection T P Tread depth t S depth Z2 Detail α, β, γ, δ, ε, η, η' angles θ, κ, λ, µ, π, ρ angles QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2021 209 457 A1

[0002]

Claims

[1] Vehicle tire with a tread having at least one row of profile blocks (1', 2') which is structured into profile blocks (1, 2) by transverse grooves (4, 5), wherein a circumferential groove bounding all profile blocks (1, 2) or several short grooves (7, 8) bounding one or more of the profile blocks (1, 2) runs axially laterally on at least one side of the row of profile blocks (1', 2'), wherein the profile blocks (1, 2) each have a block outer surface (1d, 2d), block edges (1a, 1b, 1c, 2a, 2a', 2b, 2c) along the adjacent grooves (4, 5, 7, 8) and at least one acute-angled block corner region (1f, 2f), wherein acute-angled block corner areas (1f, 2f) are provided, on which between the adjacent grooves (4, 5, 7, 8) a grip structure (9, 9) is provided which recesses the block corner of the respective profile block (1, 2). I 9 II 9 III 9 IV 9 V 9 VI) is formed, on which the block edges (1a, 1c, 2a, 2a', 2c, 2b) each have a block edge end (K E ) exhibit, where the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) - in top view an acute-angled receiving triangle (D) with a between block edge ends (K E ) running, first side of the triangle (D B ) occupies and - one corresponding to its lowest point in the radial direction, in plan view of the first side of the triangle (D B ) opposite, radially inner tip (S i ) as well as - two radially inner boundary edges (K) meeting at this point and located on the block flanks (1g, 2g, 3g). i ) shows, characterized by , that the radially inner boundary edges (K i ) the two other sides of the triangle (D B ) of the receiving triangle (D), where the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) one across the first side of the triangle (D B ) of the receiving triangle (D) adjoining the block outer surface (1d, 2d), triangular in plan view cover surface (12) and on this a radially outer point (S) a ) as well as two at the radially outer tip (S a ) converging, each forming one side of the triangle of the top surface (12), radially outer boundary edges (K a ) shows, wherein the radially outer boundary edges (K a ) with the radially inner boundary edges (K i ) at the block edge ends (K E ) converge and wherein the top surface (12) is viewed from above by one of the radially inner boundary edges (K i ) the enclosed partial area (11) of the receiving triangle (D) is enclosed in a V-shape and together with it occupies the receiving triangle (D). [2] Vehicle tires according to claim 1, characterized by , that the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) has a single plane of symmetry (E1), which extends radially and, viewed from above, through the radially inner tip (S i ) and the radially outer tip (S a ) proceeds. [3] Vehicle tires according to claim 1 or 2, characterized by , that the radially outer boundary edges (K a ), viewed from above, include an angle (π) of 45° to 110°, in particular of 55° to 90°. [4] Vehicle tires according to any one of claims 1 to 3, characterized by , that the block edges (1a, 1c, 2a, 2a', 2c, 2b), viewed in plan view and with respect to a fictitious edge intersection point (S) resulting from a straight extension of the block edges (1a, 1c, 2a, 2a', 2c, 2b) K), at the acute-angled block corner region (1f, 2f) an angle (η) of 30° to 80°, in particular of 35° to 70°, preferably of up to 65°, particularly preferably of up to 55°, most preferably of up to 45°. [5] Vehicle tires according to claims 3 and 4, characterized by , that the angle (π) formed by the radially outer boundary edges (K a ) include, at least 5°, in particular at least 10°, preferably at least 13°, especially preferably at least 15°, is larger than the angle (η) enclosed by the block edges (1a, 2a, 2a', 1c, 2b, 2c) at the acute-angled block corner region (1f, 2f). [6] Vehicle tires according to any one of claims 1 to 5, characterized by , that the radially inner tip (S i ) the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ) at a depth determined in a radial direction relative to the level of the block's outer surface (1d, 2d) (t S) of 30% to 65%, in particular of 35% to 60%, of the profile depth (T P ) lies. [7] Vehicle tires according to any one of claims 1 to 6, characterized by , that the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ), viewed from above, one perpendicular to the first side of the triangle (D B ) determined maximum length (c GS ) from 15.0 mm to 30.0 mm, in particular from 20.0 mm to 25.0 mm. [8] Vehicle tires according to claim 7, characterized by , that the top surface (12) of the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9 VI ), viewed from above, a perpendicular to the base of the triangle (D B ) determined length (c DF ) of 30% to 60%, in particular at least 50%, of the maximum length (C GS ) the handle structure (9, 9 I 9 II 9 III 9 IV 9 V 9VI ) exhibits. [9] Vehicle tires according to any one of claims 1 to 8, characterized by , that the handle structure (9, 9 I 9 II 9 III 9 IV 9 V ) has a projection (10) which extends radially from the top surface (12) of the handle structure (9, 9) I 9 II 9 III 9 IV 9 V ) as well as from two across the radially outer boundary edges (k a ) is limited to the side surfaces (13) adjoining the top surface (12). [10] Vehicle tires according to claim 9, characterized by , that the partial surface (11) of the receiving triangle (D), which surrounds the top surface (12) in a V-shape, forms a flat, arrowhead-shaped base surface (11) of the handle structure (9, 9) in plan view I 9 II 9 III ) is, from which the projection (10) rises in a radial direction and which, viewed in cross-sections, is perpendicular to the triangle base (D) in plan viewB ) are aligned, runs at a constant angle (K) to the radial direction and extends from the projection (10) to the radially inner tip (S) i ) slopes radially inwards. [11] Vehicle tires according to claim 9, characterized by , that the partial surface (11) of the receiving triangle (D), which surrounds the top surface (12) in a V-shape, forms a continuously outwardly curved, arrowhead-shaped base surface (11) of the handle structure (9) in plan view IV ) is, which, viewed in cross-sections, is perpendicular to the triangle base in plan view (D B ) are aligned, continuously curves outwards and extends from the projection (10) to the radially inner tip (S i ) continuously slopes radially inwards. [12] Vehicle tires according to claim 9, characterized by, that the partial surface (11) of the receiving triangle (D), which surrounds the top surface (12) in a V-shape, is enclosed by an arrowhead-shaped base surface (11) of the handle structure (9) in plan view V ) and an arrowhead-shaped additional projection (14) rising from it in a radial direction, wherein the base surface (11) together encloses the additional projection (14) and the projection (10) in a V-shape in plan view and the additional projection (14) encloses the projection (10) in a V-shape in plan view, so that the base surface (11) and the additional projection (14), viewed in plan view, together form the partial surface (11) of the receiving triangle (D). [13] Vehicle tires according to any one of claims 1 to 8, characterized by , that the handle structure (9 VI ) is bounded by the top surface (12) and two continuously inwardly curved side surfaces (15), wherein the side surfaces (15) each extend between one of the radially outer boundary edges (K a) and one of the radially inner boundary edges (K i ) run and over a space between the radially outer tip (S a ) and the radially inner tip (S i ) continuous, radially inwardly curved boundary edge (K*) are connected to each other, so that the side surfaces (15), viewed from above, together form the partial surface of the receiving triangle (D). [14] Vehicle tires according to any one of claims 1 to 13, characterized by , that the top surface (12) of the handle structure (9, 9 IV 9 VI ) is level with the outer surface of the block (1d, 2d) and therefore runs in the periphery of the tread. [15] Vehicle tires according to any one of claims 1 to 13, characterized by , that the top surface (12) of the handle structure (9, 9 IV 9 VI ), viewed in cross-sections that are perpendicular to the triangle base in plan view (D B) are aligned, inclined to the radial direction and additionally run straight, continuously radially inwards or continuously radially outwards, wherein the inclination in the case of a continuously curved cover surface (12) refers to a straight auxiliary line running between the ends of the cover surface (12).

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