Pneumatic vehicle tires

Abstract

The present invention relates to a pneumatic vehicle tire comprising a tread having profile protrusions (1, 2, 3), wherein in a top view, the sipes (9, 9', 9'') are formed at an angle (α) of 0° to 50° with respect to the axial direction, and the sipes have a width (b E ) of 0.4 mm to 2.0 mm and a maximum depth (t P ) of 70% to 100% of the profile depth (T E ), and the sipes have a radially inner portion (9 E ) extending to the maximum depth (t I [[ID=IO]]) at least in the sipes portion (9c) visible in the top view, and a radially outer portion (9 II ) adjacent to the radially inner portion and including an obtuse angle therewith and extending straight and at an angle (β) of at most 45° with respect to the radial direction. The radially outer portion (9 II ) varies the angle (β) with respect to the radial direction a) within the sipes (9, 9', 9'') and / or b) in the sipes (9, 9', 9'') formed in profile protrusions (1, 2, 3) arranged at different positions with respect to the tire equatorial plane (line A - A).

Description

[Technical Field]

[0001] The present invention relates to a pneumatic vehicle tire having a tread having profile protrusions such as profile blocks or profile ribs, wherein, in a plan view, sipes are formed that extend at an angle of 0° to 50° with respect to the axial direction, have a width of 0.4 mm to 2.0 mm, a maximum depth of 70% to 100% of the profile depth, and in at least one sipe portion visible in the plan view, have a radially inner portion that reaches the maximum depth, and a radially outer portion adjacent to the radially inner portion, forming an obtuse angle with it, extending straight and at an angle of up to 45° with respect to the radial direction. [Background technology]

[0002] Such pneumatic vehicle tires are known, for example, from the International Publication No. 2017 / 213230A1 pamphlet. The tread of this tire has a profile block having sipes that extend axially and have a width of 0.1 mm to 0.8 mm when viewed in plan. When considered in cross-section, the sipes consist of a radially inner portion and a radially outer portion that is obtuse to the radially inner portion and extends straight. The radially outer portion extends at a constant angle of 0° to 30° with respect to the radial direction, particularly 5° to 20°, and reaches a depth of approximately 35% of the maximum depth of the sipe in the radial direction. The radially inner portion extends at an angle of 30° to 60° with respect to the radial direction, particularly 38° to 53°, and when considered in cross-section, extends inclined radially in the opposite direction to the radially outer portion.

[0003] A further pneumatic vehicle tire having a tread with a profile block having a sipe with two radial portions, one being a radially inner portion extending in a radial direction proceeding from the sipe base, and the other being a radially outer portion adjacent to the radially inner portion and inclined at an acute angle with respect to the radial direction and extending in the direction of the tread periphery, is known from German Patent Application Publication No. 102019206591A1 and German Patent Application Publication No. 102019206592A1.

[0004] A sipe having a radially outer portion extending at an acute angle with respect to the radial direction in the region of the tread periphery improves snow grip and braking performance on dry road surfaces due to the angle of engagement present at the tread periphery, and reduces the rolling-in effect at the associated sipe edge on the profile surface. Furthermore, wear is also reduced due to a reduction in the snap-out effect under traction. Therefore, a pneumatic vehicle tire of the type mentioned at the beginning is advantageous with respect to snow grip and braking performance on dry road surfaces. Depending on the local stiffness of the individual block segments formed by the sipe, such a sipe has different effects. In particular, in a pneumatic vehicle tire having a directional tread profile, different wear of the block segments can occur, which can cause an unfavorable noise phenomenon, for example, by the formation of saw teeth.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

[0006] Therefore, the present invention is intended to further ensure the aforementioned favorable effects of sipes in the type of pneumatic vehicle tire mentioned at the beginning, to prevent locally different wear of block or rib segments, and in particular to avoid undesirable noise phenomena such as the generation of clearly audible frequencies in rolling noise. [Means for solving the problem]

[0007] The stated purpose is, The radially outer portion is a) In the sipe, and / or b) This is achieved by the present invention in which the angle with respect to the radial direction is changed in sipes formed within profile protrusions that are positioned at different locations relative to the tire's equatorial plane.

[0008] The change in the slope of the radially outer portion makes it possible to equalize the wear of block segments formed by sipes, or segments within profile ribs or profile protrusions positioned at different locations relative to the tire's equatorial plane. Therefore, wear is made uniform, particularly to conform to the position and shape of the profile blocks or profile ribs. As a result, the occurrence of undesirable rolling noise phenomena can be avoided.

[0009] According to a preferred embodiment, the radially inward portion extends at an angle of 0° to 5° with respect to the radial direction.

[0010] According to the first preferred embodiment, the radially outer portion terminates in the radial direction with a depth of 1.5 mm to 3.5 mm, particularly at least 2.0 mm, preferably at least 2.5 mm, determined with respect to the tread peripheral.

[0011] According to a further preferred embodiment, the angle of the radially outer portion has a maximum value of 5° to 35°, preferably 10° to 20°. This size is particularly advantageous for the snow grip of the tire.

[0012] A further preferred embodiment is characterized in that the angle of the radially outer portion has a maximum of 20°, preferably a minimum of 10°. This size is particularly advantageous for achieving a uniform wear pattern.

[0013] In the modified form a), it is also advantageous if the angles of the radially outer portions increase continuously.

[0014] In the last embodiment mentioned, it is even more advantageous if the angles of the radially outer portions increase by a total of at least 5°, preferably at least 10°, respectively. This embodiment ensures a particularly favorable balance between good snow performance and a uniform wear pattern.

[0015] A further preferred embodiment is that, in modified form a), each sipe, when considered in plan view, consists of a sipe portion and two sipe edge portions, each shallower than the sipe portion, one being a deeper sipe edge portion and the other a shallower sipe edge portion, and when considered in cross-section, at least one radially outer portion of the radially outer portion is continuous across the sipe edge portion, the maximum angle of the radially outer portion extending radially is at the free end of the deeper sipe edge portion, and the minimum angle of the radially outer portion extending radially is at the free end of the shallower sipe edge portion. In the deeper sipe edge portion, the sipe has a significant opening ability, and the larger angle of the radially outer portion of this sipe edge portion contributes to improved snow grip and equalization of wear behavior, because the profile convexity of the deeper sipe edge portion is otherwise prone to wear. Therefore, in the shallower sipe edge portion, a smaller angle of the radially outer portion is advantageous.

[0016] In the last preferred embodiment mentioned, it is advantageous that, in the deeper sipe edge portion, when considered in cross-section, the entire radially outer portion, preferably the radially outer portion and the radially outer portion of the radially inner portion adjacent to the radially outer portion, are continuous.

[0017] In the last preferred embodiment mentioned, it is also advantageous that, in the shallower sipe edge portion, the radially outer portion of the radially outer portion, or the entire radially outer portion, is continuous when considered in cross-section.

[0018] Furthermore, in the last preferred embodiment mentioned, it is advantageous if the sipe portion extends over at least 50% of the length of the sipe determined along the sipe centerline when considered in a plan view.

[0019] A further preferred embodiment, in variant a), provides a profile block having two sipes, wherein the angle of the radially outer portion of one sipe changes in the opposite direction to the angle of the radially outer portion of the other sipe. Such a profile block is distinguished in particular by uniform wear behavior.

[0020] In a further preferred embodiment, in variant a), the tread is provided with central or semi-central profile blocks formed on transverse grooves, each having a block edge extending at a certain angle with respect to the axial direction, comprising two opposite obtuse-angled block corner regions and two opposite acute-angled block corner regions, each (semi)central profile block having two sipes that, when considered in plan view, are parallel to each other and extend axially at an angle of 3° to 10°, particularly up to 7°, greater than the angle at which the nearest block edge extends axially, the angle at which the radially outer portion extends radially increases with respect to each acute-angled block corner region, and the inclination of the radially outer portion is preferably such that it advances from their radially inner ends and inclined with respect to the first-to-last block edge. Such profile blocks are also distinguished in particular by their uniform wear behavior.

[0021] A further preferred embodiment is distinguished in that, in modified form b), the angle of the radially outer portion decreases as each profile protrusion is closer to the tire equator.

[0022] In a further preferred embodiment, in variant b), the profile protrusions positioned at different locations relative to the tire equatorial plane include at least two from the group consisting of shoulder-side profile blocks, semi-central profile blocks, and central profile blocks, in which case at least one sipe is formed within the profile block, preferably the angle in which the radially outer portion extends radially decreases in each sipe from the sipe end on the outer side of the tread to the sipe end on the inner side of the tread. As a result, uniform wear is achieved, in particular, across the width of the tread.

[0023] Further features, advantages, and details of the present invention will now be described in more detail with reference to the drawings schematically illustrating exemplary embodiments of the present invention. [Brief explanation of the drawing]

[0024] [Figure 1] This shows a simplified plan view of the flattened profile portion of the tread of a pneumatic vehicle tire. [Figure 2] This shows a plan view of the shoulder-side profile block of the tread according to a modified form of the first embodiment of the present invention. [Figure 2a] A front view of the sipe visualization (extracted sipe) is shown. [Figure 2b] Figure 2a shows a cross-section along line IIb-IIb. [Figure 2c] Figure 2a shows a cross-section along the line IIc-IIc. [Figure 2d] Figure 2a shows a cross-section along the line IId-IId. [Figure 3] This shows a plan view of the shoulder-side profile block of the tread according to a modified form of the second embodiment of the present invention. [Figure 4] This shows a plan view of a semi-central profile block of a tread according to a modified form of the third embodiment of the present invention. [Figure 5] This shows a plan view of a semi-central profile block of a tread according to a modified fourth embodiment of the present invention. [Figure 6] This shows a plan view of the flattened profile portion of the tread, according to a modified fourth embodiment of the present invention. [Modes for carrying out the invention]

[0025] The pneumatic vehicle tire embodied by the present invention is a tire for automobiles, particularly multi-track vehicles, preferably passenger cars, vans (heavy trucks), or SUVs, and is a radially designed tire for rims having integer rim diameters of 13 to 24 inches, particularly 18 to 23 inches.

[0026] Figure 1 schematically shows a plan view of the arc-shaped profile convex portion of the tread of a pneumatic vehicle tire. The profile convex portion comprises a shoulder-side profile block 1, a semi-central profile block 2, and a central profile block 3, with profile blocks 1, 2, and 3 circumferentially separated together by two transverse grooves 4. In the shown half of the tread, the tread has a number of such profile convex portions, and the successive profile convex portions in the circumferential direction are separated from each other by their respective transverse grooves 4. The tire equatorial plane is indicated by line AA, and one transverse edge of the tread's contact area is indicated by line L, and the contact area corresponds to a statically determined footprint (determined by a tire mounted on a standard rim according to ETRTO standards, with a load of 70% of the maximum load capacity and an internal pressure of 85% of the reference pressure). The tread is directional, and the pneumatic vehicle tire is intended to be mounted on a vehicle (e.g., a passenger car) such that, while moving forward, it has a rolling direction represented by arrow R. Preferably, multiple profile protrusions are also formed on the other half of the tread, the profile protrusions extend in an overall V-shape across the width of the tread, and the profile protrusions located on one half of the tread are circumferentially offset from the profile protrusions located on the other half of the tread.

[0027] Each of the horizontal grooves 4 has a groove center line m QR It has a groove centerline m QR As viewed in a plan view, the grooves are formed radially according to the groove profile, typically to profile depths of 6.5 mm to 12.0 mm, and at their narrowest points, at least 3.0 mm, as viewed in a plan view, along the groove centerline m QR It also has a width determined perpendicular to it, and when considered in a plan view, each groove center line m QR It extends at an angle α of 50° to 70° with respect to the straight auxiliary line h1 connecting the ends of the circle.

[0028] Extending between the circumferentially adjacent transverse grooves 4 are grooves 5a formed further inside the tread to separate the central profile block 3 from the semi - central profile block 2, and grooves 5b formed further outside the tread to separate the semi - central profile block 2 from the shoulder - side profile block 1. The grooves 5a, 5b each have a groove center line m R and a constant width b of 2.0 mm to 4.0 mm, which is determined perpendicular to the groove center line m as viewed in plan view R and a constant depth in the radial direction of 30% to 80% of the profile depth. The grooves 5a, 5b extend circumferentially inclined in a direction opposite to the transverse grooves 4. R The profile blocks 1, 2, 3 each have a block outer surface 6 at the tread periphery, a leading - side block edge 7 formed on one of the transverse grooves 4, which together delimits the block outer surface 6 and first enters the contact patch when the tire rolls forward (arrow R), and a trailing - side block edge 8 on the other transverse groove 4, which together delimits the block outer surface 6.

[0029] The possible configurations of the profile blocks 1, 2, 3 will be described below based on FIGS. 2 to 6.

[0030] According to FIG. 2, sipes 9 are provided on the shoulder - side profile block 1. The sipes 9, when considered in plan view, extend straight and circumferentially inclined in the same direction with respect to the block edges 7, 8, cross the shoulder - side profile block 1 within the contact area, merge into the groove 5b, and have a sipe center line m

[0031] <( which follows the sipe profile, and have two sipe edges 10 that extend straight and parallel to each other on the block outer surface 6 as viewed in plan view. The sipes 9 are bounded by two sipe walls 11 (FIG. 2b) that proceed from the sipe edges 10 and a sipe base 12 (FIG. 2b). According to FIGS. 2b to 2d, the sipes 9 proceed from the sipe center line m E and have a sipe central plane M that is equidistant from the sipe walls 9 E proceeding from the sipe center line m and spaced equidistantly from the sipe walls 11 EIt has (Figure 2b). Sipe 9 is located at the sipe centerline m E Perpendicular to and sipe central plane M E A constant width b of 0.4 mm to 2.0 mm, particularly up to 1.6 mm, preferably up to 1.0 mm, determined perpendicularly to the direction. E And, radially, 70% to 100% of the profile depth, especially the maximum depth t, which reduces the profile depth by at most 0.5 mm. E (Depth at the deepest point, Figure 2a)

[0032] As shown in Figure 2 in combination with Figure 2a, the sipe 9, when viewed in a plan view and considered over its longitudinal range, has a maximum depth t E The central sipe portion 9c (Figure 2a) formed in (Figure 2a) is composed of two sipe edge portions 9a and 9b (Figure 2a). When considered in a plan view, the central sipe portion 9c (Figure 2a) is preferably formed along the sipe center line m E It reaches at least 50% of the length of sipe 9 as determined along (Figure 2).

[0033] As shown in Figures 2b to 2d, the sipe 9 in the central sipe section 9c is located along the sipe centerline m in the plan view. E When considering a cross-section extending perpendicularly (see the positions of lines IIb-IIb, IIc-IIc, and IId-IId in Figure 2a), the radially extending radially inner portion 9 I and the radially outer portion 9 II It consists of the radially outer portion 9 II When considered in the cross-section described above, the sipe extends straight and at an angle β of 0° to 45° with respect to the radial direction, with a central plane M of 1.5 mm to 3.5 mm, particularly at least 2.0 mm, preferably at least 2.5 mm. EIn contrast, it extends radially to a certain depth t1 (see Figure 2) determined with respect to the tread peripheral. As shown in Figure 2 in conjunction with Figures 2a to 2d, the angle β (Figures 2b, 2c, and 2d) changes in size continuously, particularly continuously (i.e., uniformly), over the range of the sipe 9 when viewed in plan view, and the angle β has its maximum value at the sipe end on the groove 5b (Figure 2). The maximum value of the angle β is particularly 5° to 35°, preferably 10° to 20°. The minimum value of the angle β is particularly 20°, preferably 10°. It is also preferable that the size of the angle β changes by a total of at least 5°, preferably at least 10°. As shown in Figure 2 in relation to Figures 2a to 2d, the radially outer portion 9 II The inclination proceeds from its radially inner end and is inclined with respect to the first-arriving block edge 7 (Figure 2). Therefore, the radially outer portion 9 II As the depth increases, it moves away from the first-to-arrive block edge 7.

[0034] According to Figure 2a, the sipe edge portions 9a and 9b are shallower than the central sipe portion 9c in this embodiment. The sipe edge portion 9a is the radially outer portion 9 of the central sipe portion 9c. II Adjacent to the central sipe portion 9c, which includes the maximum value of angle β, is a depth t that is at least 0.5 mm, preferably at least 1.0 mm, greater than the already mentioned depth t1. a It has a radial dimension. Depth t a Furthermore, the maximum depth of sipe 9 is t E It is particularly preferable when the depth is reduced by only 1.0 mm. In the sipe edge portion 9a, the sipe 9, when considered in cross-section, is the radially outer portion 9 II and the radially inner portion 9 I Radially outer portion 9 I a has and thereafter part 9 I , 9 II Correspondingly, it is continuous from the central sipe portion 9c to the sipe edge portion 9a. Therefore, the radially outer portion 9 IIThe increase in angle β continues in the sipe edge portion 9a. The sipe edge portion 9b is the radially outer portion 9 in the central sipe portion 9c. II Adjacent to the side of the central sipe portion 9c, which contains the minimum value of angle β, is at least 0.5 mm, and is at least 0.5 mm, preferably at least 1.0 mm, smaller than the already mentioned depth t1. b It has a radial direction. In the sipe edge portion 9b, the sipe 9, when considered in cross-section, has a radially outer portion 9 II Radially outer portion 9 II It has only a, and thereby part 9 II Correspondingly, it continues from the central sipe portion 9c to the sipe edge portion 9b. Therefore, the radially outer portion 9 II The decrease in angle β continues in the sipe edge portion 9b.

[0035] Figure 3 shows a further variation of the shoulder-side profile block 1. The shoulder-side profile block 1 is provided with two sipes 9, which, when considered in plan view, extend in the same direction with respect to the block edges 7 and 8, inclined with respect to the circumferential direction, traverse the shoulder-side profile block 1 within the ground area, and merge into the groove 5b. (Shown) Radial outer portion 9 II The inclination of each sipe 9 is such that it proceeds from its radially inner end and inclined with respect to the first block edge 7, and the radially outer portion 9 of one sipe 9 II The angle β is the radially outer portion 9 of the other sipe 9. II It changes in the opposite direction to the angle β.

[0036] Figure 4 shows the semi-central profile block 2. The semi-central profile block 2 is provided with two sipes 9. When considered in plan view, the two sipes 9 extend in the same direction with respect to the block edges 7 and 8, inclined with respect to the circumferential direction, traverse the semi-central profile block 2, and merge into grooves 5a and 5b. The sipe 9 closer to the first block edge 7 has a radially outer portion 9 IIThe sipe 9 is inclined from its radially inner end relative to the first-to-first block edge 7, and in the sipe 9 closer to the second-to-first block edge 8, the radially outer portion 9 II It is inclined from its radially inner end with respect to the rear-side block edge 8.

[0037] Figure 5 shows a further variation of the semi-central profile block 2. The block edges 7 and 8 of the semi-central profile block 2, when considered in plan view, extend at an angle γ with respect to a straight auxiliary line h2 connecting the ends of each block edge 7 and 8. The semi-central profile block 2 has two opposite obtuse-angled block corner regions 2a and two opposite acute-angled block corner regions, namely, a first-contact acute-angled block corner region 2b that first enters the contact patch when the tire rolls forward, and a second-contact acute-angled block corner region 2b'. The semi-central profile block 2 is provided with two sipes 9, which, when considered in plan view, are parallel to each other and, in each case, have a sipe center line m with respect to the axial direction. E It extends at an angle γ' relative to the edge, and angle γ' is 3° to 10°, and especially up to 7°, greater than the angle γ of the nearest block edges 7 and 8, respectively. Radial outer portion 9 II The inclination proceeds from their radially inner ends, and the inclination is such that they are inclined with respect to the first block edge 7, and the radially outer portion 9 of one sipe 9 II The angle β is the radially outer portion 9 of the other sipe 9. II The angle β changes in the opposite direction to the angle β. For sipes 9 closer to the first-placed block edge 7, the angle β increases with respect to the acute-angled block corner region 2b on the first-placed side. For sipes 9 closer to the second-placed block edge 8, the angle β increases with respect to the acute-angled block corner region 2b' on the second-placed side.

[0038] Figure 6 schematically shows a plan view of a further arc-shaped profile section having a shoulder-side profile block 1, a semi-central profile block 2, and a central profile block 3. Sipe 9 is formed in the central profile block 3, sipe 9' is formed in the semi-central profile block 2, and sipe 9'' is formed in the shoulder-side profile block 1. When considered in plan view, sipes 9, 9', and 9'' extend inclined with respect to the circumferential direction in the same direction with respect to the block edges 7, 8 and merge into grooves 5a, 5b. The sipe base 12 is schematically shown for each sipe 9, 9', and 9''. Sipes 9' and 9'' have their radially outer portions 9 II Regarding this, it differs from sipe 9. In all sipes 9, 9', and 9'', the radially outer portion 9 II (Not shown in Figure 6, see Figures 2b-2c) is inclined from its radially inner end relative to the first-arriving block edge 7. Radially outer portion 9 II The angle β is, in any case, from the upper outer sipe end of the tread to the inner sipe end of the tread, the radially outer portion 9 of sipes 9, 9', and 9''. II It decreases continuously within the radially outer portion 9. II The angle β decreases from sipe 9'' to sipe 9' and from sipe 9' to sipe 9. Therefore, the radially outer portion 9 of sipe 9' II The minimum value of angle β is, at most, the radially outer portion 9 of sipe 9. II This is the maximum value of the angle β, and therefore the radially outer portion 9 of the sipe 9'. II The maximum value of angle β is at most the radially outer portion of sipe 9'' 9 II This is the minimum value of angle β. Angle β is generally between 0° and 45°, and is the minimum value of part 9 of sipe 9. II The maximum value of the angle β is preferably 15° at most, and the portion 9' of the sipe 9' II The maximum value of the angle β is preferably 30° at most.

[0039] In further exemplary embodiments not shown, profile blocks 1, 2, and 3 (see Figure 1) are provided, each having at least one sipe. The sipe is located on the radially outer portion 9 II (See Figures 2b to 2d) It has a radially outer portion 9 II The angle β (see Figures 2b-2d) extending radially is constant within each sipe, and becomes smaller as each profile protrusion approaches the tire equatorial plane (line AA). Therefore, the radially outer portion 9 of the sipe in the central profile block 3 II The angle β is smallest, and the radially outer portion 9 of the sipe in the shoulder-side profile block 1. II The angle β is largest.

[0040] The present invention is not limited to the exemplary embodiments described.

[0041] Each sipe is adjacent to the radially outer portion, extending radially to the tread peripheral, with a maximum width of 1.0 mm, and especially a maximum width of 0.5 mm in the central plane M of the sipe. E It may have a transition section having a length relative to the axial direction. When considered in a plan view, the sipe extends at an angle of 0° to 50° with respect to the axial direction.

[0042] In any case, the sipe has radially adjacent portions in the sipe portion that reaches over a portion of the sipe as seen in the plan view, and the sipe portion preferably reaches over at least 50% of the length of the sipe determined along the sipe centerline as seen in the plan view. The radially inward portion extends at an angle of up to 5° with respect to the radius. The sipe edge portion of the sipe is optional.

[0043] When considered in a plan view, sipes preferably extend in a straight line or in a continuously curved (arc-shaped) manner. In the case of curved sipes, the angles seen in the plan view are related to the straight auxiliary lines connecting the ends of the sipe's centerline.

[0044] Sipes may also be provided within profile ribs that extend circumferentially.

[0045] The tread doesn't need to have a specific direction.

[0046] List of reference codes 1. Shoulder-side profile block 2. Semi-central profile block 2a Obtuse angle block corner region 2b, 2b' Acute-angled block corner region 3. Central Profile Block 4 Yokomizo 5a, 5b groove 6. Outer surface of the block 7 First-come-first-served block edge 8. Rear-mounted block edge 9, 9', 9'' sipes 9a Sipe edge portion 9b Sipe edge portion 9c Central sipe section 9 I radially inner part 9 I a Radial outer part 9 II radially outer part 9 II a Radial outer part 10 Sipe Edges 11 Sipe Wall 12 Sipe base AA line (tire equatorial plane) b E , b R width h1, h2 auxiliary line L-shaped line (lateral edge of the grounding area) m E Sipe centerline M E Sipe central plane m R , m QR Groove center line R Arrow (Rolling direction) t1, t a t b depth t E Maximum depth Angles α, β, γ, γ'

Claims

1. A pneumatic vehicle tire having a tread with profile blocks (1, 2, 3) or profile protrusions (1, 2, 3) such as profile ribs, In a plan view, it extends at an angle (α) of 0° to 50° with respect to the axial direction, with a width (b) of 0.4 mm to 2.0 mm. Ｅ ) and profile depth (T Ｐ ) 70% to 100% of the maximum depth (t Ｅ )and, In at least one sipe portion (9c) visible in the plan view, the maximum depth (t Ｅ ) Radially inward portion reaching (9 Ｉ ), and a radially outer portion (9) adjacent to the radially inner portion, forming an obtuse angle with it, extending straight and at an angle (β) of up to 45° with respect to the radial direction. ＩＩ )and A sipe (9, 9', 9'') having is formed. In pneumatic vehicle tires, The outer part of the radius direction (9) ＩＩ ) が、 a) Within the sipes (9, 9', 9''), and / or b) In the sipes (9, 9', 9'') formed within profile protrusions (1, 2, 3) positioned at different locations with respect to the tire equatorial plane (line A-A), the angle (β) with respect to the radial direction is changed. A pneumatic tire for vehicles characterized by the following features.

2. The radially inner portion (9 Ｉ The pneumatic vehicle tire according to claim 1, characterized in that the ) extends at an angle of 0° to 5° with respect to the radial direction.

3. Said radially outer part (9 ＩＩ ) is, in the radial direction, determined with respect to the tread periphery and has a depth (t １ ) of 1.5 mm to 3.5 mm, particularly at least 2.0 mm, preferably at least 2.5 mm, and terminates at this depth. The pneumatic vehicle tire according to claim 1 or 2, characterized in that.

4. Said radially outer portion (9 ＩＩ A pneumatic vehicle tire according to any one of claims 1 to 3, characterized in that the angle (β) of the tire has a maximum value of 5° to 35°, preferably 10° to 20°.

5. Said radially outer portion (9 ＩＩ The pneumatic vehicle tire according to any one of claims 1 to 4, characterized in that the angle of the tire has a maximum value of 20° and preferably a minimum value of 10°.

6. In the modified form a), the radially outer portion (9 ＩＩ A pneumatic vehicle tire according to any one of claims 1 to 5, characterized in that the angle (β) of each of the following increases continuously.

7. Said radially outer portion (9 ＩＩ The pneumatic vehicle tire according to claim 6, characterized in that the angles (β) of each of the following are increased in total by at least 5°, preferably at least 10° in total.

8. In modified form a), when considering each sipe (9, 9', 9'') in a plan view, The aforementioned sipe portion (9c) and Each of these embodiments is shallower than the aforementioned sipe portion (9c), and there are two sipe edge portions (9a, 9b) where one is a deeper sipe edge portion (9a) and the other is a shallower sipe edge portion (9b) than the deeper sipe edge portion (9a). Composed of, When considering the cross-section, the radially outer portion (9 ＩＩ ) at least one radially outer portion (9 ＩＩ a) is continuous across the sipe edge portion (9a, 9b), Said radially outer portion (9 ＩＩ The maximum value of the angle (β) that extends in the radial direction is at the free end of the deeper sipe edge portion (9a), and the radially outer portion (9 ＩＩ The minimum value of the angle (β) that extends radially is at the free end of the shallower sipe edge portion (9a). A pneumatic vehicle tire according to any one of claims 1 to 7, characterized in that

9. In the deeper sipe edge portion (9a) mentioned above, when considered in cross-section, the radially outer portion (9 ＩＩ ) the entire, preferably the radially outer portion (9 ＩＩ ) and the radially inner portion adjacent to the radially outer portion (9 Ｉ ) Radially outer part (9 Ｉ a) is a continuous pneumatic tire for a vehicle according to claim 8.

10. In the shallower sipe edge portion (9b) mentioned above, when considering the cross-section, the radially outer portion (9 ＩＩ The radially outer portion (9 ＩＩ a) or the radially outer part (9 ＩＩ The pneumatic vehicle tire according to claim 8 or 9, characterized in that the entire tire is continuous.

11. When considering the aforementioned sipe portion (9c) in a plan view, the sipe centerline (m Ｅ A pneumatic vehicle tire according to any one of claims 8 to 10, characterized in that it extends over at least 50% of the length of the sipe (9, 9', 9'') determined along the )

12. In modified form a), a profile block (2) is provided, each having two sipes (9). The radially outer portion (9) of one of the sipes (9) ＩＩ The angle (β) of the other sipe (9) is the radially outer portion (9 ＩＩ ) changes in the opposite direction to the angle (β) of the aforementioned angle. A pneumatic vehicle tire according to any one of claims 1 to 11, characterized in that

13. In modified form a), a central or semi-central profile block (2) is provided, formed on the transverse groove (4), each having a block edge (7, 8) extending at an angle (γ) with respect to the axial direction, and two opposite obtuse angle block corner regions (2a) and two opposite acute angle block corner regions (2b, 2b) are provided. Each of the (semi)central profile blocks (2) is provided with two sipes (9) that, when considered in a plan view, are parallel to each other and extend in the axial direction at an angle (γ') of 3° to 10° greater than the angle (γ) at which the nearest block edges (7, 8) extend in the axial direction, particularly at an angle (γ') up to 7° greater. Said radially outer portion (9 ＩＩ The angle (β) in which the ) extends with respect to the radial direction increases with respect to the respective acute block corner regions (2b, 2b'), Said radially outer portion (9 ＩＩ The inclination of the blocks is preferably such that it proceeds from their radially inner ends and is inclined with respect to the first-arriving block edge (7). A pneumatic vehicle tire according to any one of claims 1 to 12, characterized in that

14. In modified form b), the closer each of the profile protrusions (1, 2, 3) is to the tire equatorial plane (line A-A), the more the radially outer portion (9 ＩＩ A pneumatic vehicle tire according to any one of claims 1 to 5, characterized in that the angle (β) of the aforementioned angle becomes smaller.

15. In modified form b), the profile protrusions (1, 2, 3) positioned at different locations with respect to the tire equatorial plane (line A-A) include at least two from the group consisting of shoulder-side profile block (1), semi-central profile block (2), and central profile block (3), In either case, at least one of the sipes (9, 9', 9'') is formed within the profile block (1, 2, 3), Preferably, the radially outer portion (9 ＩＩ The angle (β) extending radially decreases in each sipe (9, 9', 9'') from the outer sipe end to the inner sipe end of the tread. A pneumatic vehicle tire according to any one of claims 1 to 5 or 14, characterized in that

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