Commercial-vehicle tyre

Abstract

The invention relates to a commercial-vehicle tyre comprising a directional tread, each tread half (H) having a shoulder-side profile rib (3), wherein each shoulder-side profile rib (3) is delimited by a shoulder-side circumferential groove (6) which is in particular of profile depth and is provided with crossing sipes (16) that extend parallel to one another in plan view and at an angle (y) deviating from 0° relative to the axial direction, the crossing sipes having a width (bE) of 0.40 mm to 2.00 mm, a maximum depth (tE) of at least 30% of the profile depth, an entering sipe end (16a) on the inner side of the tread, and an exiting sipe end (16b) on the outer side of the tread. The angle (y) at which the sipes (16) of the shoulder-side profile rib (3) extend with respect to the axial direction is 27.0° to 40.0°.

Description

[0001] 202400261 Description Commercial vehicle tire The invention relates to a commercial vehicle tire with a directional tread with one shoulder-side profile rib in each tread half, wherein each shoulder-side profile rib is delimited by a shoulder-side circumferential groove and is provided with transverse cuts running parallel to one another in plan view and to the axial direction at an angle deviating from 0°, with a width of 0.40 mm to 2.00 mm, a maximum depth of at least 30% of the tread depth, an incoming cut end on the inside of the tread, and an outgoing cut end on the outside of the tread. Such a commercial vehicle tire is known, for example, from WO 2023 / 025336 A1. In the described embodiment, the commercial vehicle tire has a directional tread with one or two shoulder-side profile rib(s).which is / are provided with traversing incisions, each formed centrally in a tread rib web, with a width of 0.40 mm to 2.00 mm and a maximum depth of at least 40% of the tread depth. Each incision has a cut zone offset from the radially outer cut periphery and running in a wave-shaped direction in its extension direction, with the amplitude of the wave shape decreasing towards the end of the cut on the outside of the tread. The incision runs in particular parallel to the block edges, which run in a barely perceptible S-shape and which are inclined to the axial direction - based on an auxiliary line running straight in plan view - at an angle of 10° to 25°, in particular of 13° to 20°,The cut therefore also runs at this angle. The cuts are beneficial for the grip properties while maintaining a uniform wear pattern in the area of ​​the shoulder-side tread rib. 202400261 In addition to their beneficial effects on grip properties, cuts are also particularly important for tread drainage, and in the case of commercial vehicle tires of the type mentioned above, for the drainage of the shoulder-side tread ribs. At the same time, cuts increase tire-road noise due to their cut edges penetrating the ground when rolling. This also applies, after corresponding tread wear, to cuts formed in tread rib webs offset from the tread periphery. For commercial vehicle tires of the type mentioned above, efforts are currently ongoing toto balance the drainage performance and the tire-road noise in a more favorable manner than before. The invention is therefore based on the object of resolving the conflicting objectives between tire-road noise and drainage performance in a pneumatic vehicle tire of the type mentioned above in a more favorable manner than before. This object is achieved according to the invention in that the angle at which the cuts in the shoulder-side tread rib extend to the axial direction is 27.0° to 40.0°. It has surprisingly been found that cuts in shoulder-side tread ribs that are so atypical and pronouncedly inclined to the axial direction make a significantly smaller contribution to rolling noise, so that the tire-road noise is significantly reduced. In addition, the cuts - also due to their angle - exhibit particularly favorable water drainage behavior.so that the conflict of objectives between tire-road noise and drainage performance is resolved in a significantly more advantageous manner than before. The use of commercial vehicle tires according to the invention on the drive axle is particularly advantageous. 202400261 According to a preferred embodiment, the angle at which the cuts of the shoulder-side profile ribs run to the axial direction is 28.0° to 37.0°, preferably 29.0° to 35.0°, particularly preferably 30.0° to 33.0°. This contributes to a particularly advantageous balance between low tire-road noise and good drainage performance. According to a further preferred embodiment, the tread in each tread half has a semi-central profile rib separated from the shoulder-side profile rib by the respective shoulder-side circumferential groove, with transverse cuts with a width of 0.40 mm to 2.00 mm and a maximum depth of at least 30% of the profile depth, wherein the cuts of each semi-central profile rib, viewed in plan view, run parallel to one another and to the axial direction at an angle of 27.0° to 40.0°, in particular from 28.0° to 37.0°, preferably from 29.0° to 35.0°, particularly preferably from 30.0° to 33.0°, and are inclined in the same direction with respect to the axial direction as the cuts of the shoulder-side profile rib located in the same tread half, and wherein preferably the angle at which the cuts of each semi-central profile rib run to the axial direction deviates from the angle at which the cuts of the shoulder-side profile rib located in the same tread half run to the axial direction by up to 5°, in particular by up to 3°, and wherein particularly preferably the angle at which the cuts of each semi-central profile rib run to the axial direction run, with the angle,under which the cuts of the shoulder-side profile rib located in the same tread half run in the axial direction. The same inclination of the cuts in the semi-central profile ribs to the cuts of the shoulder-side profile ribs further improves the drainage performance. The very similar or identical angles of the cuts contribute to a particularly advantageous solution to the aforementioned conflict of objectives. 202400261 According to an advantageous further development of the last-mentioned preferred embodiment, the cuts of each semi-central profile rib are offset in the circumferential direction from the cuts of the shoulder-side profile rib located in the same tread half in such a way that exactly one of the cuts of each semi-central profile rib is in the area between two incoming cut ends of the cuts of the shoulder-side profile ribs located in the same tread half on the inside of the tread.The shoulder-side tread rib flows into the shoulder-side circumferential groove. This contributes to a uniform drainage performance across the tread circumference and prevents any noise interference that could amplify tire-road noise. According to a further advantageous development of the last-mentioned preferred embodiment, the tread has in each tread half a central profile rib separated from the semi-central profile rib by a lateral circumferential groove with transverse cuts having a width of 0.40 mm to 2.00 mm and a maximum depth of at least 30% of the profile depth, wherein the cuts of each central profile rib, viewed in plan view, are parallel to one another and to the axial direction at an angle of 27.0° to 40.0°, in particular from 28.0° to 37.0°, preferably from 29.0° to 35.0°, particularly preferably from 30.0° to 33.0°,extend and are inclined in the same direction with respect to the axial direction as the incisions of the shoulder-side profile rib located in the same tread half, and wherein preferably the angle at which the incisions of each central profile rib extend to the axial direction deviates from the angle at which the incisions of the shoulder-side profile rib located in the same tread half extend to the axial direction by up to 5°, in particular by up to 3°, and wherein particularly preferably the angle at which the incisions of each central profile rib extend to the axial direction corresponds to the angle at which the incisions of the shoulder-side profile rib located in the same tread half extend to the axial direction,202400261 Central tread ribs designed in this way represent a particularly advantageous addition to the other tread ribs and contribute to a particularly advantageous solution to the conflict of objectives between tire-road noise and drainage performance. In the case of the previously mentioned further advantageous development, it is additionally advantageous if the cuts of each central tread rib are offset in the circumferential direction from the cuts of the semi-central tread rib located in the same tread half in such a way that exactly one of the cuts of each central tread rib opens into the lateral circumferential groove in the area between two incoming cut ends of the cuts of the semi-central tread rib located in the same tread half on the inside of the tread. This contributes - while avoiding any,Noise interference that amplifies tire-road noise contributes to an additional homogenization of the drainage performance across the tread circumference. A further preferred embodiment consists in the incisions located in the same tread rib: a) each originate from the outer rib surface, b) each originate from the bottom of a depression traversing the tread rib and open to the tread periphery with a maximum depth of 2.0 mm to 5.0 mm, determined in the radial direction, or c) are formed in a tread rib web of the tread rib that is offset radially inward relative to the outer rib surface, wherein the tread rib web is located in a transverse groove traversing the tread rib with a width of 4.0 mm to 14.0 mm, in particular 6.0 mm to 12.0 mm, preferably 7.0 mm to 10.0 mm, and extends exclusively in sections over the transverse groove.in plan view is elongated along the groove profile of the transverse groove and is preferably spaced from each end of the transverse groove. 202400261 According to a particularly advantageous combination of the aforementioned embodiments, the cuts of each shoulder-side tread rib are designed according to variant b) or variant c) and the cuts of each central and semi-central tread rib are designed according to variant a). As a result, the shoulder-side tread ribs are more strongly stiffened than the central tread ribs. The central tread ribs have a larger negative tread portion than the shoulder-side tread ribs, which is beneficial for the drainage performance. In the latter preferred embodiment, an advantageous further development is that in variant c) the tread rib has tread blocks separated from one another by the transverse grooves, each with a first tread block that enters the ground when the tire rolls forward.incoming block edge and a trailing block edge, wherein the profile blocks are each provided with at least one, in particular exactly one, drainage groove, which opens into the two transverse grooves adjacent to the respective profile block in the area radially outside the profile rib web and has a maximum, in particular constant depth of 1.00 mm to 3.00 mm, in particular of 1.50 mm to 2.50 mm. The drainage groove contributes to compensating for the reduction in the empty volume of the transverse groove associated with the profile rib web in variant c), whereby the drainage performance of the profile rib is maintained at a particularly high level. In this context, it is particularly advantageous in the advantageous further development if the profile rib web has a cover surface which, in plan view, extends at least over the majority of its longitudinal extent and runs parallel to the outer surface of the rib, which, viewed in plan view,defines a central groove section relative to the groove centerline of the transverse groove and (co-)limits this in the radial direction, wherein the drainage groove opens into the central groove sections of the two transverse grooves adjacent to the respective profile block. 202400261 Furthermore, in the advantageous further development for the drainage of the profile rib, it is additionally advantageous if the drainage groove, viewed in plan view, is composed of a main groove section emerging from the profile block via the incoming block edge, which runs straight in plan view and preferably in the circumferential direction, and a groove opening section emerging from the profile block via the outgoing block edge, - wherein the main groove section - viewed in plan view and in each case at the level of the rib outer surface - has straight groove edges, a straight center line, and a width of 1.50 mm to 2.50 mm, determined perpendicular to the center line,which preferably increases linearly starting from the end of the groove main section located at the incoming block edge, therefore having its smallest value at the incoming block edge and its largest value at the end facing the outgoing block edge, the largest value being 110% to 130% of the smallest value, and - wherein the groove opening section - viewed in plan view and related to a straight auxiliary line completing the outgoing block edge interrupted in the region of the groove opening section - has a length of 2.0 mm to 5.0 mm determined as a straight extension of the center line of the groove main section and a width determined in plan view parallel to the auxiliary line at the level of the rib outer surface, which width decreases continuously starting from the auxiliary line and has its largest value along the auxiliary line, which, with a constant width of the groove main section, is 250% to 450%, in particular 300% to 400%,of this width and which, with increasing width of the groove main section, amounts to 250% to 450%, in particular 300% to 400%, of the largest value of the width of the groove main section. A drainage groove designed in this way ensures particularly efficient drainage of the outer surface of the tread rib. In this context, it is additionally advantageous if the groove main section has a distance of 30% to 70%, in particular 40% to 65%, preferably 45% to 55%, relative to its center line and, in the case of block edges of the same length, relative to the inside tread end of the block edges, and, in the case of block edges of different lengths, relative to the inside tread end of the longer of the two block edges.the length of the transverse groove projected in the axial direction. Preferably, the groove opening section has, at the level of the rib outer surface, a circular arc-shaped boundary edge on the outside of the tread when viewed from above and a circular arc-shaped boundary edge on the inside of the tread, wherein the boundary edges end at the straight auxiliary line completing the block edge and connect tangentially to the ends of the groove edges of the main groove section and tangentially to the interrupted block edge, wherein the boundary edge on the outside of the tread preferably extends over the entire groove opening section, and wherein particularly preferably the boundary edge on the outside of the tread has a first radius and the boundary edge on the inside of the tread has a second radius.The size of the second radius is 20% to 50% of the size of the first radius. This contributes to a low-turbulence water flow or a low-turbulence water introduction into the transverse groove and thus to a further improvement in drainage performance. It is also advantageous if each profile block is provided with at least one, in particular several, preferably two or three, additional groove(s) which, viewed in plan view, run between the drainage groove and the or one of the circumferential grooves adjacent to the profile rib, are inclined in the same direction with respect to the axial direction as the incisions in the profile rib, and have(s) a maximum depth corresponding to the maximum depth of the drainage groove, wherein the or each additional groove is preferably composed of a main groove section and a groove opening section 202400261 running to the drainage groove.wherein the groove main section runs, with respect to its center line, in particular parallel to the incisions of the profile rib and has a width determined perpendicular to the center line, which increases linearly from the end of the groove main section located at the circumferential groove, amounts to 1.50 mm to 2.50 mm and has its smallest value at the end of the groove main section facing away from the drainage groove and its largest value of 120% to 180%, in particular from 130% to 170%, preferably from 140% to 160%, of the smallest value at the end facing the drainage groove. Such additional grooves represent a particularly advantageous addition to the drainage groove for the drainage performance. According to a further preferred embodiment, it is provided that the angle at which the incisions of the profile rib run to the axial direction coincides or lies within an interval of 5°, in particular of 3°,vary. This contributes in particular to low tire-road noise. Further features, advantages and details of the invention will now be described in more detail with reference to the drawing, which schematically shows an embodiment of the invention. Fig. 1 shows a plan view of a circumferential section of a tread of a commercial vehicle tire with an embodiment variant of the invention, Fig. 2 shows an enlarged plan view of the detail Z2 of Fig. 1, Fig. 3 shows a section along the line III-III of Fig. 2, Fig. 4 shows a further enlarged plan view of the detail Z4 of Fig. 1, Fig. 5 shows an oblique view according to the viewing direction indicated by the arrow S5 in Fig. 2 and 202400261 Fig. 6 shows a further enlarged plan view of the detail Z6 of Fig. 1. Commercial vehicle tires designed according to the invention are tires for multi-track motor vehicles, in particular for buses or trucks,and preferably pneumatic vehicle tires of radial design for rims with a rim diameter of 17.5, 19.5 or 22.5 inches. Fig. 1 shows a plan view of a circumferential section of a tread of a commercial vehicle tire. The tire equatorial plane is indicated by a line AA. The tread has two tread halves H adjoining one another at the tire equatorial plane as well as a directional tread pattern, whereby the commercial vehicle tire is to be mounted on the axle of a commercial vehicle in such a way that it has the rolling direction symbolized by the arrow R when driving forward. The tread has in each tread half H a central tread rib 1 located to the side of the tire equatorial plane (line AA), a semi-central tread rib 2 and a shoulder-side tread rib 3. The central tread ribs 1 are separated by acentral circumferential groove 4. Each semi-central profile rib 2 is separated from the adjacent central profile rib 1 by a lateral circumferential groove 5 and from the adjacent shoulder-side profile rib 3 by a shoulder-side circumferential groove 6. In the exemplary embodiment, the circumferential grooves 4, 5, 6 run in a wave-like manner in plan view, are designed in the radial direction to the respectively provided tread depth of usually 6.0 mm to 25.0 mm, in particular of at least 10.0 mm, and have on the tread periphery in the axial direction in each case a maximum width BUR (width at the widest point) of 2.5 mm to 25.0 mm, in particular of 3.0 mm to 10.0 mm, wherein in the exemplary embodiment the maximum width BUR of the circumferential grooves 4, 5 corresponds and the maximum 202400261 width BUR of each shoulder-side circumferential groove 6 is in particular 125% to 250% of the maximum width BUR of the circumferential grooves 4, 5. If the circumferential grooves 4, 5,6 are designed with different depths, the tread depth is understood to be the depth of the deepest circumferential groove(s) 4, 5, 6. The design of the tread ribs 1, 2, 3, which will be discussed in more detail below, is such that the tread ribs 1, 2, 3 located in one tread half H can be mapped onto one another by mirroring them on the tire equatorial plane (line AA) and additional displacement in the circumferential direction. The profile ribs 1, 2, 3 each have an outer rib surface 1a (central profile ribs 1), 2a (semi-central profile ribs 2), 3a (shoulder-side profile rib 3) located in the tread periphery, are each traversed by a number of transverse grooves 7 (central profile rib 1), 8 (semi-central profile rib 2), 9 (shoulder-side profile ribs 3) which follow one another in the circumferential direction and open into the adjacent circumferential groove(s) 4, 5, 6 and are thus divided into central profile blocks 10 (central profile rib 1),semi-central tread blocks 11 (semi-central tread rib 2) or shoulder-side tread blocks 12 (shoulder-side tread rib 3) are structured. The transverse grooves 7, 8 are shown only in a simplified manner. The profile blocks 10, 11, 12 are each delimited at the level of the outer rib surface 1a, 2a, 3a on the respectively adjacent transverse grooves 7, 8, 9 by an incoming block edge 10a, 11a, 12a which first enters the ground when the tire rolls during forward travel (arrow R) and an outgoing block edge 10b, 11b, 12b, wherein the block edges 10a, 11a, 12a, 10b, 11b, 12b are straight in plan view and run parallel to one another within each profile rib 1, 2, 3 and wherein the profile blocks 10, 11, 12 each have a at the level of the outer rib surface 1a, 2a, 3a between the respective block edges 10a, 10b or 11a, 11b or 12a, 12b have a block length cB of 30.0 mm to 70.0 mm, determined in the circumferential direction. 202400261 The transverse grooves 7, 8, 9 are at the level of the rib outer surface 1a, 2a,3a is thus limited by the block edges 10a, 10b (transverse groove 7), 11a, 11b (transverse groove 8), 12a, 12b (transverse groove 9). The transverse grooves 7, 8, 9 each have a straight groove center line mQR7 (transverse grooves 7), mQR8 (transverse grooves 8), mQR9 (transverse grooves 9) aligned in their direction of extension in plan view, correspondingly spaced from the block edges 10a, 10b or 11a, 11b or 12a, 12b, and a constant width bQR7 (transverse groove 7), bQR8 (transverse groove 8), bQR9 (transverse groove 9) of 4.0 mm to 14.0 mm, in particular of 6.0 mm to 12.0 mm, preferably of 7.0 mm to 10.0 mm, and in the radial direction a maximum depth tQR (depth at the deepest point, Fig. 3: shown for transverse groove 9) of 70% to 100%, in particular of at least 85%, of the tread depth. The transverse grooves 7, 8, 9 run,viewed in plan view and relative to the groove center line mQR7, mQR8, mQR9, within the respective profile rib 1, 2, 3 parallel to one another and to the axial direction at an angle α (transverse grooves 7), β (transverse grooves 8), γ (transverse grooves 9), of 27.0° to 40.0°, in particular of 28.0° to 37.0°, preferably of 29.0° to 35.0°, particularly preferably of 30.0° to 33.0°, wherein the transverse grooves 7, 8, 9, which run in the profile ribs 1, 2, 3 in one tread half H, are inclined in the opposite direction to the transverse grooves 7, 8, 9, which run in the profile ribs 1, 2, 3 in the other tread half H, with respect to the axial direction in such a way that each transverse groove 7, 8, 9 on the corresponding circumferential groove 4, 5, 6, a groove end 7a (transverse groove 7), 8a (transverse groove 8), 9a (transverse groove 9) on the inside of the tread and which first enters the ground when the tyre rolls forward (arrow R) and a groove end 7a (transverse groove 7), 8a (transverse groove 8), 9a (transverse groove 9) on the outside of the tread,tapered groove end 7b (transverse groove 7), 8b (transverse groove 8), 9b (transverse groove 9). Preferably, the sizes of the angles α, β, γ are identical. The following will first discuss the further design of a shoulder-side profile rib 3, followed by the further design of a central profile rib 1 and a semi-central profile rib 2. 202400261 According to Fig. 2, the transverse grooves 9 formed in the shoulder-side profile rib 3 have a length cQR projected in the axial direction, determined at the level of the rib outer surface 3a, and related to one of the block edges 12a, 12b in the case of matching long block edges 12a, 12b, or to the longer of the two block edges 12a, 12b in the case of non-matching long block edges 12a, 12b. In each transverse groove 9, a spaced-apart from its ends and extending over the majority of the length cQR,A profile rib web 13 is formed which is connected to the shoulder-side profile blocks 12 and offset in the radial direction relative to the outer rib surface 3a. The profile rib web 13 is delimited in the radial direction by a cover surface 13a (see Fig. 3) which is parallelogram-shaped in plan view, elongated along the groove center line mQR9 and runs at a constant depth t1 determined in the radial direction (Fig. 3) from 2.0 mm to 5.0 mm, on the outside of the tread by a side flank 13b which is curved in sections towards the cover surface 13a and on the inside of the tread by a side flank 13c which is curved in sections towards the cover surface 13a, wherein between the cover surface 13a and each adjacent shoulder-side profile block 12 there is formed a transition rounding 14 which runs in the direction of the block edge 12a or 12b (see Fig. 3) and wherein between each side flank 13b,13c and each adjacent shoulder-side tread block 12, a transition curve 15 is provided. Alternatively, the side flank 13b, 13c can be formed from the two transition curves 15. The transverse groove 9 is, viewed in plan view, composed of a central groove section 91 extending beyond the cover surface 13a, a groove shoulder section 92 on the outside of the tread and co-delimited by the side flank 13b, and a groove mouth section 93 on the inside of the tread and co-delimited by the side flank 13c, wherein the "pitch" is related to the groove center line mQR9. The groove shoulder section 92 is delimited from the tread rib web 13 by the side flank 13b and the transition curves 15 adjoining it. The groove mouth section 93 and the 202400261 groove shoulder section 92 have – determined relative to the level of the rib outer surface 3a – the already mentioned maximum depth tQR (Fig.3,The central groove section 91 has a depth (depth at the deepest point) of the transverse groove 9 of 70% to 100% of the tread depth. The central groove section 91 has—relative to the groove centerline mQR9—a length c1 projected in the axial direction of 50% to 80%, in particular of 65% to 75%, of the length cQR of the transverse groove 9 and, in the radial direction, the aforementioned depth t1 (Fig. 3) of 2.0 mm to 5.0 mm. The profile rib web 13, viewed in plan view, is provided with a straight incision 16 extending from the cover surface 13a, which crosses the profile rib web 13 along the groove center line mQR9, therefore having an incision center line mE coinciding therewith, centrally following the incision path, and, viewed in plan view, extends at the already mentioned angle γ with respect to the incision center line mE to the axial direction,runs radially into the interior of the tread rib 13 and, in the exemplary embodiment, opens over its entire extent into a tubular channel 17 (see Fig. 3) formed inside the tread rib 13 and also traversing it. The cut 16 has - analogous to the transverse groove 9 - an incoming cut end 16a on the inside of the tread which first enters the ground (i.e., the ground contact patch) when the tire rolls forward (arrow R), and a tapered cut end 16b on the outside of the tread. The cut 16 and the channel 17 emerge from the tread rib 13 on the side flanks 13b, 13c. The incision 16 has a constant width bE (Fig.3) of 0.4 mm to 2.0 mm, in particular of up to 1.6 mm, and in the radial direction a maximum depth tE (Fig.3, depth at the deepest point) of 30% to 100%, in particular of 40% to 70%,the profile depth. The channel 17 has a circular cross-section and a diameter dK (Fig. 3) of in particular 150% to 800%, preferably 300% to 700%, of the width bE of the cut 16. In the exemplary embodiment, the maximum depth tE of the cut 16, the already mentioned maximum depth tQR of the transverse groove 9 and the diameter dK of the channel 17 are coordinated with one another accordingly. 202400261 As Fig. 2 further shows, each shoulder-side profile block 12 is provided with a single, superficial drainage groove 18 which, in plan view, runs straight in the circumferential direction, opens into the central groove sections 91 of the adjacent transverse grooves 9 and is composed of a main groove section 18a emerging from the shoulder-side profile block 12 via the incoming block edge 12a and a groove opening section 18b. The drainage groove 18 has a maximum depth tN which is constant over its extension in the radial direction (Fig.5,The drainage groove 18 has a depth (depth at the deepest point) of 1.00 mm to 3.00 mm, in particular of 1.50 mm to 2.50 mm, and is delimited in the radial direction, as shown in Fig. 5, by a groove base 18c and further by two groove flanks 18d extending in the radial direction. Furthermore, the maximum depth tN of the drainage groove 18 corresponds at most to the aforementioned depth t1 (Fig. 3), at which the cover surface 13a of the profile rib web 13 extends. The main groove section 18a has on the rib outer surface 3a two groove edges 18a', 18a'' which run straight in plan view - namely a groove edge 18a' on the outside of the tread and a groove edge 18a'' on the inside of the tread - and a straight center line mN which is spaced at the same distance from these in plan view and lies at the level of the rib outer surface 3a, a width bN determined perpendicular to the center line mN at the level of the rib outer surface 3a and a width bN which is directed to the center line mN and, with block edges 12a of the same length,12b, the distance aN, determined in the axial direction, is from 30% to 70%, in particular from 40% to 65%, preferably from 45% to 55%, of the length cQR of the transverse groove 9, based on the inside tread end of the block edges 12a, 12b and, in the case of block edges 12a, 12b of non-matching length, based on the inside tread end of the longer of the two block edges 12a, 12b. The width bN increases linearly from the end of the main groove section 18a located at the incoming block edge 12a, is 1.50 mm to 2.50 mm, has its smallest value bNmin at the incoming block edge 12a and its largest value bNmax of 110% to 130% of the smallest value bNmin at its end facing the outgoing block edge 12b. 202400261 According to Fig.4, the groove opening section 18b - viewed in plan view and relative to a block edge 12b that completes the discontinuous block edge 12b in the region of the groove opening section 18b,straight auxiliary line h1 - a length cb of 2.0 mm to 5.0 mm determined in a straight extension of the center line mN and a width bb determined in plan view parallel to the auxiliary line h1 at the level of the rib outer surface 3a, which width bb decreases continuously from the auxiliary line h1 over the extent of the groove opening section 18b and has its greatest value bbmax of 250% to 450%, in particular from 300% to 400%, of the greatest value bNmax of the width bN of the groove main section 18a along the auxiliary line h1. The groove opening section 18b is laterally delimited by two flank end sections 18d', 18d'' belonging to the groove flanks 18d and ending at the central groove section 91 - namely a flank end section 18d' of the groove flank 18d adjoining the tread outer groove edge 18a' and a flank end section 18d'' of the groove flank 18d adjoining the tread inner groove edge 18a''. Each flank end section 18d',18d'' has, at the level of the rib outer surface 3a, a tread outer boundary edge k1 (flank end section 18d') and a tread inner boundary edge k2 (flank end section 18d''), wherein the boundary edges k1, k2 extend in a circular arc with opposite curvature directions, end at the auxiliary line h1, and connect tangentially to the corresponding end of the respective groove edge 18a', 18a'' as well as tangentially to the interrupted block edge 12b. The boundary edge k1 extends over the entire groove opening section 18b and has a radius r1. The boundary edge k2 has a radius r2, the size of which is 20% to 50% of the size of the radius r1. As Fig.2 further shows, each shoulder-side profile block 12 is further provided with two superficial additional grooves 19, which, viewed in plan view,inclined in the same direction as the transverse grooves 9 with respect to the axial direction and extend between the drainage groove 18 and the shoulder-side circumferential groove 6 202400261 and are each composed of a main groove section 19a and a groove mouth section 19b extending towards the drainage groove 18. Each additional groove 19 has a maximum depth tN' (depth at the deepest point) that is constant over its extent and corresponds to the maximum depth tN of the drainage groove 18, is delimited in the radial direction by a groove base 19c (Fig. 5) and further by two groove flanks 19d extending in the radial direction (Fig. 5). The main groove section 19a is delimited on the rib outer surface 3a by two straight groove edges 19a',19a'' – namely an incoming groove edge 19a' which first enters the ground when the commercial vehicle tire rolls during forward travel (arrow R) and a outgoing groove edge 19a'' – has a straight center line mN' which, in plan view, is spaced at the same distance from the groove edges 19a', 19a'' and lies at the level of the rib outer surface 3a and runs, viewed in plan view and relative to the center line mN', parallel to the transverse grooves 9 and the cuts 16. The groove main section 19a has a width bN' determined perpendicular to the center line mN' at the level of the rib outer surface 3a, which width increases linearly from the end of the groove main section 19a located at the shoulder-side circumferential groove 6, amounts to 1.50 mm to 2.50 mm, and has its smallest value at the tread-inside end of the groove main section 19a bNmin' and at its side facing the drainage groove 18,tread outer end has its greatest value bNmax' (cf. Fig. 6) of 120% to 180%, in particular of 130% to 170%, preferably of 140% to 160%, of the smallest value bNmin'. According to Fig.6, the groove opening section 19b - viewed in plan view and related to a straight auxiliary line h2 which completes the groove edge 18a'' on the inside of the tread and which is interrupted in the area of ​​the groove opening section 19b - has a length cb' of 2.0 mm to 5.0 mm, determined as a straight extension of the center line mN', and a width bb' determined in plan view parallel to the auxiliary line h2 at the level of the rib outer surface 3a, which width decreases continuously starting from the auxiliary line h2 over the extension of the groove opening section 19b and has its greatest value bbmax' of 300% to 500%, in particular from 350% to 450%, along the auxiliary line h2 202400261of the largest value bNmax' of the width bN' of the main groove section 19a. The groove opening section 19b is laterally delimited by two flank end sections 19d', 19d'' belonging to the groove flanks 19d and ending at the drainage groove 18 - namely a flank end section 19d' of the groove flank 19d adjoining the incoming groove edge 19a' and a flank end section 19d'' of the groove flank 19d adjoining the outgoing groove edge 19a''. Each flank end section 19d', 19d'' has a circular arc-shaped boundary edge k3 (flank end section 19d'), k4 (flank end section 19d'') at the level of the rib outer surface 3a, which ends at the auxiliary line h2 and is tangential to the corresponding end of the respective groove edge 19a',19a'' and tangentially adjoins the interrupted groove edge 18a'' of the drainage groove 18 on the inside of the tread. The boundary edge k4 runs over the entire groove opening section 19b and has a radius r4. The boundary edge k3 has a radius r3 whose size is 5% to 15% of the size of the radius r4. The additional grooves 19 have - viewed in plan view and relative to their groove center lines mN' - distances aN' (Fig. 2) from each other and from the nearest block edge 12a or 12b in the circumferential direction of 23% to 43%, in particular from 30% to 35%, of the associated block length cB (Fig. 2). According to Fig.1, the central profile blocks 10 of each central profile rib 1 and the semi-central profile blocks 11 of each semi-central profile rib 2 are each provided with a traversing cut 20 opening into the adjacent circumferential grooves 4, 5, 6 with a constant width of 0.40 mm to 2.00 mm, in particular of 0.80 mm to 1.60 mm,and a maximum depth (depth at the deepest point) determined in the radial direction of 30% to 100%, in particular of 40% to 70%, of the profile depth, wherein the incisions 20 within the respective profile rib 1, 2 run parallel to one another in plan view. In the exemplary embodiment, each incision 20 runs in a wave-like manner in plan view in sections and has an incision center line mE' which follows the center of the incision and is therefore wavy in sections, wherein the incision 20 - based on a straight incision base line bL connecting the ends 202400261 of the incision center line mE' - runs at an angle γ' of 27.0° to 40.0°, in particular of 28.0° to 37.0°, preferably of 29.0° to 35.0°, particularly preferably of 30.0° to 33.0° to the axial direction, wherein the incisions 20 each have an incoming incision end 20a on the inside of the tread and ahave a tapered incision end 20b, and wherein the incisions 20 in the profile ribs 1, 2, which are each located in the same tread half H, are oriented in the same axial direction as the incisions 9 of the shoulder-side profile rib 3, which is also located in this tread half H. The incisions 20 of each semi-central profile rib 2 are further offset in the circumferential direction relative to the incisions 16 of the shoulder-side profile rib 3, which is located in the same tread half H, in such a way that exactly one of the incisions 20 opens into the shoulder-side circumferential groove 6 in the region between two incoming incision ends 16a on the inside of the tread of two incisions 16 which follow one another in the circumferential direction. The incisions 20 of each central tread rib 1 are further offset in the circumferential direction relative to the incisions 20 of the semi-central tread rib 2 located in the same tread half H,that exactly one of the incisions 20 from the central tread rib 1 opens into the lateral circumferential groove 5 in the area between two inlet incision ends 20a on the inside of the tread of two circumferentially successive incisions 20 from the semi-central tread rib 2. Preferably, the sizes of the angles α, β, γ, γ' are the same or vary within an interval of 5°, in particular of 3°. "Varying within an interval of 5°, in particular of 3°" means that the largest angle(s) α, β, γ, γ' deviates or deviates from the smallest angle(s) α, β, γ, γ' by up to 5°, in particular by up to 3°. The invention is not limited to the described exemplary embodiment. 202400261 The incisions 16, 20 formed in the profile ribs 1, 2, 3 can be, independently of one another, viewed in plan view, straight, at least in sections, preferably continuously,curved and at least in sections wavy. The incisions can run at least in sections curved and at least in sections wavy, wherein the wave shape can also be formed in the curved section. The incisions 16, 20 run, viewed in plan view and relative to a straight incision base line (cf. incision base line bL of the incisions 20 in Fig. 1), at an angle of 27.0° to 40.0°, in particular from 28.0° to 37.0°, preferably from 29.0° to 35.0°, particularly preferably from 30.0° to 33.0°, to the axial direction. The incision base line runs between the ends of the incision center line which, in plan view, follows the respective incision course, for example the wave shape, in the middle. If the incision center line runs straight, the incision base line coincides with the incision center line. The incisions 16, 20 can each be made directly from the outer rib surface 1a, 2a, 3a,each originate from the bottom of a depression traversing the respective tread rib 1, 2, 3 and open to the tread periphery with a maximum depth (depth at the deepest point) of 2.0 mm to 5.0 mm, determined in the radial direction, or from the cover surface of a tread rib web located in a transverse groove traversing the tread rib 1, 2, 3, is offset radially inwards relative to the rib outer surface 1a, 2a, 3a and extends in sections over the transverse groove.

[0002] 202400261 List of reference symbols 1....................................... central profile rib 1a ..................................... outer rib surface 2....................................... semi-central profile rib 2a ..................................... outer rib surface 3....................................... shoulder-side profile rib 3a ..................................... outer rib surface 4....................................... central circumferential groove 5....................................... lateral circumferential groove 6....................................... shoulder-side circumferential groove 7....................................... transverse groove 7a ..................................... incoming groove end 7b ..................................... outgoing groove end 8....................................... transverse groove 8a ..................................... incoming groove end 8b ..................................... outgoing groove end 9.......................................Transverse groove 9a ..................................... incoming groove end 9b ..................................... outgoing groove end 91..................................... central groove section 92..................................... groove shoulder section 93..................................... groove mouth section 10..................................... central tread block 10a ................................... incoming block edge 10b ................................... outgoing block edge 11..................................... semi-central tread block 11a ................................... incoming block edge 11b ................................... outgoing block edge 202400261 12..................................... shoulder-side tread block 12a ................................... incoming block edge 12b ................................... outgoing block edge 13..................................... tread rib web 13a ................................... Cover surface 13b ................................... Side flank 13c ................................... Side flank 14..................................... Transition curve 15..................................... Transition curve 16..................................... Cut 16a ................................... Incoming cut end 16b ................................... Outgoing cut end 17..................................... Channel 18..................................... Drainage groove 18a ................................... Main groove section 18a' .................................. Outside tread edge 18a'' ................................. Inside tread edge 18b ................................... Groove mouth section 18c ................................... Groove base 18d ................................... Groove flank 18d', 18d'' ........................ Flank end section 19.....................................Additional groove 19a ................................... Main groove section 19a' .................................. Incoming groove edge 19a'' .................................. Outgoing groove edge 19b ................................... Groove mouth section 19c ................................... Groove base 19d ................................... Groove flank 19d', 19d'' ........................ Flank end section 20..................................... Cut 20a ................................... Incoming cut end 20b ................................... Outgoing cut end 202400261 AA ................................... Line (tire equatorial plane) aN, aN' ............................... Distance bb, bb', bE, bN, bN' .............. Width bQR7, bQR8, bQR9................ Width bbmax, bbmax', bNmax, bNmax' . Largest value bL ..................................... Cut base line bNmin, bNmin' ....................... Smallest value BUR ................................... maximum width cb, cb', cQR, c1................... length cB ..................................... block length dK ..................................... diameter H ...................................... tread half h1, h2................................ auxiliary line k1, k2, k3, k4...................... boundary edge mE, mE' ............................. cutting centre line mN, mN' ............................. centre line mQR7, mQR8, mQR9............. groove centre line R ...................................... arrow (rolling direction) r1, r2, r3, r4......................... radius S5..................................... arrow (viewing direction) t1...................................... depth tE, tN, tN', tQR ..................... maximum depth Z2, Z4, Z6.......................... detail α, β, γ, γ' .......................... angle.

Claims

202400261 Patent claims 1. Commercial vehicle tire with a tread designed in a directional manner with a shoulder-side profile rib (3) in each tread half (H), wherein each shoulder-side profile rib (3) is delimited by a shoulder-side circumferential groove (6) designed in particular to the profile depth and is provided with transverse cuts (16) running parallel to one another and to the axial direction at an angle (γ) deviating from 0° in plan view, with a width (bE) of 0.40 mm to 2.00 mm, a maximum depth (tE) of at least 30% of the profile depth, an incoming cut end (16a) on the inside of the tread and an outgoing cut end (16b) on the outside of the tread, characterized in that the angle (γ) at which the cuts (16) of the shoulder-side profile rib (3) run to the axial direction is 27.0° to 40.0°. 2.Commercial vehicle tyre according to claim 1, characterised in that the angle (γ) at which the incisions (16) of the shoulder-side profile ribs (3) extend to the axial direction is 28.0° to 37.0°, preferably 29.0° to 35.0°, particularly preferably 30.0° to 33.0°.

3. Commercial vehicle tire according to claim 1 or 2, characterized in that the tread in each tread half (H) has a semi-central tread rib (2) separated from the shoulder-side tread rib (3) by the respective shoulder-side circumferential groove (6), with transverse cuts (20) with a width of 0.40 mm to 2.00 mm and a maximum depth of at least 30% of the tread depth, wherein the cuts (20) of each semi-central tread rib (2), viewed in plan view, are parallel to one another and to the axial direction at an angle (γ') of 27.0° to 40.0°, in particular of 28.0° to 37.0°, preferably of 29.0° to. 202400261 35.0°, particularly preferably from 30.0° to 33.0°, and are inclined with respect to the axial direction in the same direction as the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H), and wherein preferably the angle (γ') at which the incisions (20) of each semi-central profile rib (2) run to the axial direction deviates from the angle (γ) at which the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H) run to the axial direction by up to 5°, in particular by up to 3°, and wherein particularly preferably the angle (γ') at which the incisions (20) of each semi-central profile rib (2) run to the axial direction corresponds to the angle (γ) at which the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H) Profile rib (3) runs in the axial direction. 4.Commercial vehicle tire according to claim 3, characterized in that the cuts (20) of each semi-central tread rib (2) are offset in the circumferential direction from the cuts (16) of the shoulder-side tread rib (3) located in the same tread half (H) in such a way that exactly one of the cuts (20) of each semi-central tread rib (2) opens into the shoulder-side circumferential groove (6) in the region between two tread-inside, inlet cut ends (16a) of the cuts (16) of the shoulder-side tread rib (3) located in the same tread half (H).Commercial vehicle tyre according to claim 3 or 4, characterised in that the tread in each tread half (H) has a central tread rib (1) separated from the semi-central tread rib (2) by a lateral circumferential groove (5), with transverse cuts (20) having a width of 0.40 mm to 2.00 mm and a maximum depth of at least 30% of the tread depth, wherein the cuts (20) of each central tread rib (1), viewed in plan view, run parallel to one another and to the axial direction at an angle (γ') of 27.0° to 40.0°, in particular of 28.0° to 37.0°, preferably of 29.0° to 35.0°, particularly preferably of 30.0° to 33.0°, and with respect to the axial. 202400261 Direction are inclined in the same direction as the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H), and wherein preferably the angle (γ') at which the incisions (20) of each central profile rib (1) run to the axial direction deviates from the angle (γ) at which the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H) run to the axial direction by up to 5°, in particular by up to 3°, and wherein particularly preferably the angle (γ') at which the incisions (20) of each central profile rib (1) run to the axial direction coincides with the angle (γ) at which the incisions (16) of the shoulder-side profile rib (3) located in the same tread half (H) run to the axial direction.Commercial vehicle tire according to claim 5, characterized in that the cuts (20) of each central tread rib (1) are offset in the circumferential direction from the cuts (20) of the semi-central tread rib (2) located in the same tread half (H) in such a way that exactly one of the cuts (20) of each central tread rib (1) opens into the lateral circumferential groove (5) in the region between two tread-inside, inlet cut ends (20a) of the cuts (20) of the semi-central tread rib (2) located in the same tread half (H).Commercial vehicle tire according to one of claims 1 to 6, characterized in that the cuts (16, 20) which are located in the same tread rib (1, 2, 3) a) each start from the rib outer surface (1a, 2a), b) each start from a bottom of a depression which crosses the tread rib and is open towards the tread periphery and has a maximum depth of 2.0 mm to 5.0 mm, determined in the radial direction, or c) are formed in a tread rib web (13) of the tread rib (3) which is offset radially inwards relative to the rib outer surface (3a), the tread rib web (13) being located in a transverse groove (9) which crosses the tread rib (3). 202400261 a width (bQR9) of 4.0 mm to 14.0 mm, in particular of 6.0 mm to 12.0 mm, preferably of 7.0 mm to 10.0 mm, extends exclusively in sections over the transverse groove (9), is elongated in plan view along the groove profile of the transverse groove (9), and is preferably spaced from each end of the transverse groove (9).

8. Commercial vehicle tire according to claims 3, 5, and 7, characterized in that the incisions (16) of each shoulder-side tread rib (3) are designed according to variant b) or variant c), and wherein the incisions (20) of each central and semi-central tread rib (1, 2) are designed according to variant a). 9.Commercial vehicle tire according to claim 7 or 8, characterized in that in variant c) the tread rib (3) has tread blocks (12) separated from one another by the transverse grooves (9), each having an incoming block edge (12a) which first enters the ground when the tire rolls during forward travel (arrow R) and an outgoing block edge (12b), wherein the tread blocks (12) are each provided with at least one, in particular exactly one, drainage groove (18) which opens into the two transverse grooves (9) adjacent to the respective tread block (12) in the region radially outside the tread rib web (13) and has a maximum, in particular constant, depth (tN) of 1.00 mm to 3.00 mm, in particular of 1.50 mm to 2.50 mm. 10.Commercial vehicle tire according to claim 9, characterized in that the tread rib web (13) has a cover surface (13a) which, in plan view, extends at least over the majority of its longitudinal extent and runs parallel to the rib outer surface (3a), which, viewed in plan view, defines a central groove section (91) related to the groove center line (mQR9) of the transverse groove (9) and (co-)delimits this in the radial direction, wherein the drainage groove (18) opens into the central groove sections (91) of the two transverse grooves (9) adjacent to the respective tread block (12). 202400261 11. Commercial vehicle tire according to claim 9 or 10, characterized in that the drainage groove (18), viewed in plan view, is composed of a groove main section (18a) emerging from the tread block (12) via the incoming block edge (12a), extending straight in plan view and preferably in the circumferential direction, and a groove opening section (18b) emerging from the tread block (12) via the outgoing block edge (12b), - wherein the groove main section (18a) - viewed in plan view and in each case at the level of the rib outer surface (3a) - has straight groove edges (18a, 18a''), a straight center line (mN) and a width (bN) determined perpendicular to the center line (mN) of 1.50 mm to 2.50 mm, which preferably starts from the end of the groove main section located at the incoming block edge (12a) (18a) increases in a linear manner,therefore has its smallest value (bNmin) at the incoming block edge (12a) and its largest value (bNmax) at its end facing the outgoing block edge (12b), the largest value (bNmax) being 110% to 130% of the smallest value (bNmin), and - wherein the groove opening section (18b) - viewed in plan view and related to a straight auxiliary line (h1) completing the outgoing block edge (12b) interrupted in the region of the groove opening section (18b) - has a length (cb) of 2.0 mm to 5.0 mm, determined in a straight extension of the center line (mN) of the groove main section (18a), as well as a width (bb) determined in plan view parallel to the auxiliary line (h1) at the level of the rib outer surface (3a), which decreases continuously starting from the auxiliary line (h1) and has its largest value (bbmax), which at a constant width (bN) of the main groove section (18a) is 250% to 450%, in particular 300% to 400%,this width (bN) and which, with increasing width (bN) of the groove main section (18a), is 250% to 450%, in particular 300% to 400%, of the largest value (bNmax) of the width (bN) of the groove main section (18a).

12. Commercial vehicle tire according to claim 11, characterized in that the groove main section (18a) has a width (bN) on its center line (mN) and, with matching, 202400261 long block edges (12a, 12b) relative to the tread-side end of the block edges (12a, 12b), or in the case of non-matching long block edges (12a, 12b), relative to the tread-side end of the longer of the two block edges (12a, 12b), in the axial direction determined distance (aN) of 30% to 70%, in particular of 40% to 65%, preferably of 45% to 55%, of the axially projected length (cQR) of the transverse groove (9).

13. Commercial vehicle tyre according to claim 11 or 12, characterised in that the groove opening section (18b) has, at the level of the outer rib surface (3a), a boundary edge (k1) on the outside of the tread which runs in a circular arc in plan view, and a boundary edge (k2) on the inside of the tread which runs in a circular arc, the boundary edges (k1, k2) ending at the straight auxiliary line (h1) completing the block edge (12b) and adjoining tangentially to the ends of the groove edges (18a',18a'') of the main groove section (18a) and tangentially to the interrupted block edge (12b), wherein the tread outer boundary edge (k1) preferably runs over the entire groove opening section (18b) and wherein particularly preferably the tread outer boundary edge (k1) has a first radius (r1) and the tread inner boundary edge (k2) has a second radius (r2), wherein the size of the second radius (r2) is 20% to 50% of the size of the first radius (r1).

14. Commercial vehicle tyre according to one of claims 9 to 13, characterised in that each profile block (12) is provided with at least one, in particular several, preferably two or three, additional groove(s) (19) which, viewed in plan view, extend between the drainage groove (18) and the or one of the circumferential grooves (6) adjacent to the profile rib (1, 2, 3),are inclined in the same direction with respect to the axial direction as the incisions (16) located in the profile rib (3) and have or have a maximum depth (tN') corresponding to the maximum depth (tN) of the drainage groove (18), 202400261 wherein the or each additional groove (19) is preferably composed of a main groove section (19a) and a groove mouth section (19b) extending to the drainage groove (18), wherein the main groove section (19b) extends, with respect to its center line (mN'), in particular parallel to the incisions (16) of the profile rib (3) and has a width (bN') determined perpendicular to the center line (mN), which width increases linearly from the end of the main groove section (19a) located at the circumferential groove (6), is 1.50 mm to 2.50 mm and has its smallest value (bNmin') at the end of the main groove section (19a) facing away from the drainage groove (18) and its largest value (bNmax') of 120% to 180%, in particular of 130% to 170%, preferably 140% to 160%, of the smallest value (bNmin'). 15.Commercial vehicle tyre according to one of claims 1 to 14, characterised in that the angle (γ, γ') at which the cuts (16, 20) of the profile rib (1, 2, 3) extend to the axial direction are the same or vary within an interval of 5°, in particular of 3°.

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