Vehicle tire

Abstract

The invention relates to a vehicle tyre (1) having a tread (1a) comprising at least one profile block (2), the profile block profile (10) of the profile block (2) comprising a contact side profile (12), an edge region profile (13), a chamfered profile (14) and a side edge profile (15), the contact side profile (12) adjoining the edge region profile (13), the edge region profile (13) adjoining the chamfered profile (14), and the chamfered profile (14) adjoining the side edge profile (15), wherein the contact-side contour (12) extends substantially in a base surface (1b) of the tread (1a), and wherein at least one point on the edge region contour (13) is located at an edge region height (23) above the base surface (1b). The profile block profile (10) presents a convex curve between a first point (15a) on the flank profile (15) and a second point (14a) on the chamfered profile (14) below the base plane (1b).

Description

Technical Field

[0001] The invention relates to a vehicle tire having a tread, wherein the tread comprises at least one tread block. The tread block profile of the tread block comprises a contact side profile, an edge region profile, a chamfer profile and a side edge profile, wherein the contact side profile adjoins the edge region profile, wherein the edge region profile adjoins the chamfer profile, and wherein the chamfer profile adjoins the side edge profile. The contact side profile extends substantially in a base surface of the tread, wherein at least one point on the edge region profile is located at an edge region height above the base surface. Background Art

[0002] The tread blocks on the tread of a vehicle tire have a specific profile that may affect various properties of the vehicle tire. On the one hand, chamfers are provided on the block edges of the tread blocks, for example, to increase traction on snow. The chamfers can also improve the adhesion properties on wet and dry roads under braking conditions. Alternatively, radially protruding edge areas are provided on the tread blocks, which can achieve a grinding effect as snow edges and improve traction on snow. Radially protruding edge areas or ribs can also help to reduce pass-by noise.

[0003] DE 10 2015 223 535 A1 describes a vehicle pneumatic tire with tread blocks, wherein grooves are respectively adjacent to each tread block in the circumferential direction, and wherein ribs are formed on the tread blocks, which ribs extend adjacent to the groove sections and have a height of 0.2 mm to 0.5 mm in the radial direction relative to the corresponding tread block surface and a width of 0.7 mm to 1.9 mm at their base.

[0004] Some profile characteristics of the tread blocks may also have a negative impact on the characteristics of the vehicle tire or cause negative side effects. For example, chamfers may have a negative impact on pass-by noise. Snow edges may have a negative impact on dry braking characteristics. Therefore, until now, the improvement to be achieved by a specific profile characteristic in one area has usually been weighed against the associated deterioration in other areas. Summary of the invention

[0005] The invention is based on the object of optimizing the snow traction properties of a vehicle tire without thereby deteriorating the braking properties on wet and dry roads and without thereby negatively affecting the passing noise.

[0006] According to the invention, the stated object is achieved in that the tread block profile has a convex curve between a first point on the lateral edge profile and a second point on the chamfer profile located below the base surface.

[0007] The invention is firstly based on the idea that the positive snow traction properties of the chamfer and the snow edge can be combined by a combination of a chamfer profile according to the invention and an edge area profile according to the invention. In addition, the invention recognizes that undesirable side effects caused by the chamfer or the snow edge, respectively, can be mitigated, eliminated or even overcompensated by the positive effects of the corresponding other profile properties. In particular, unfavorable dry braking properties associated with the edge area profile according to the invention and in particular with the snow edge can be offset by the favorable braking properties associated with the chamfer profile according to the invention. On the other hand, unfavorable effects on the pass-by noise associated with the chamfer profile according to the invention can be offset by favorable effects on the pass-by noise associated with the edge area profile according to the invention.

[0008] When directional terms such as axial, axially, radially, radially and circumferentially are used, they refer to a vehicle tire mounted on a vehicle for its intended use and the rolling motion performed thereon. In this context, radial direction means a direction perpendicular to the axis of rotation of the vehicle tire and intersecting the axis of rotation. Inward in the radial direction means an orientation in the radial direction towards the axis of rotation. Outward in the radial direction means an orientation in the radial direction away from the axis of rotation. Circumferential direction means the direction of the rolling motion around the axis of rotation. During a rotation of 360° of the vehicle tire when the vehicle is moving forward, a position of the vehicle tire that is forward in the circumferential direction passes the minimum distance to the road surface earlier than a position that is backward in the circumferential direction, wherein the position that is backward in the circumferential direction passes its minimum distance to the road surface no more than 180° after the position that is forward. Axial direction means a direction parallel to the axis of rotation. In this context, axially inwardly pointing means an orientation that is axially towards the tire equatorial plane or the tire equator. The tire equatorial plane is a plane perpendicular to the rotation axis of the vehicle tire, passing through the center of the axial width of the vehicle tire, wherein the tire equatorial line extends in the tire equatorial plane and extends over the surface of the vehicle tire.

[0009] The base surface of the tread coincides with a smooth surface in the macroscopic sense that the tread would have if no concave and convex tread elements, such as grooves or protuberances, were provided on the tread. In particular, the base surface is physically retained in any portion of the tread where no such tread elements are provided. The base surface section obtained can be at least partially designated for contact with the road surface. In portions where, for example, grooves extend through the tread, the base surface continues as an imaginary surface above the grooves; in portions where, for example, protuberances are arranged on the tread, the base surface continues as an imaginary surface below the protuberances.

[0010] When the contact side profile extends in the base surface for more than 50% of its length, the contact side profile can then be said to extend substantially in the base surface. The contact side profile can for example be interrupted by cuts and / or projections on the tread or extend partially through cuts and / or beyond projections.

[0011] Microscopic roughness can occur on the base surface of the tread block or on the contact side, edge area, side edge or chamfer surface, etc. This microscopic roughness can be produced within the scope of the manufacturing process by printing the mold into the tire and / or by post-treatment of the heated tire. Such roughness is characterized by an amplitude of less than 50 μm and can affect the friction characteristics of the rough surface on various surfaces or with different contact objects. Roughness is omitted in the description of the present invention, but it can be combined with the theory according to the present invention.

[0012] A point on the edge area contour is located above the base surface at the edge area height if the point is at a distance from the base surface measured perpendicularly to the base surface extending hypothetically below the point by the edge area height. A point is located below the base surface if the point is spaced from the base surface measured perpendicularly to the base surface extending hypothetically below the point. If the base surface is curved, the distance is measured along the normal vector on the base surface.

[0013] Alternatively, the tread in the unfolded state can be observed and thus used as a basis for distance measurements and, for example, direction measurements. In the unfolded state, the tread is unfolded or turned over from the vehicle tire in the circumferential direction and in the axial or radial direction in such a way that the base surface lies in a flat plane.

[0014] The tread block profile has a convex curve between a first point on the side edge profile and a second point on the chamfer profile located below the base surface, provided that the tread block profile between these two points is located only outside a straight connecting line segment extending between these two points, wherein the outside faces the surface of the tread block. The connecting line may have a meandering course and / or include one or more edges. Preferably, the distance of the convex curve from the straight connecting line segment, measured perpendicularly to the straight connecting line segment between the first point and the second point, is at least 0.3 mm, preferably between 0.5 mm and 1 mm.

[0015] The contact side profile, the edge region profile, the chamfered edge profile and the flank profile can merge into one another continuously in pairs and thus also in pairs in first and higher derivatives. Alternatively, the contact side profile, the edge region profile, the chamfered edge profile and the flank profile can merge into one another in pairs at defined angles. It should be noted that angles in a certain tread of a vehicle tire are usually rounded with a certain transition radius within the scope of production tolerances.

[0016] Particularly preferred is an embodiment in which, in the unfolded state of the tread, the contact side profile extends substantially along a first straight line, wherein the chamfered profile extends substantially along a second straight line, and wherein the second straight line is rotated by the chamfer angle relative to the first straight line. Furthermore, in the unfolded state of the tread, the side edge profile may extend substantially along a third straight line, wherein the third straight line may be rotated by the side edge angle relative to the first straight line. In particular, the chamfer angle is preferably smaller than the side edge angle. Furthermore, in the unfolded state of the tread, a first section of the edge region profile adjoining the chamfered profile may extend substantially along a further straight line, wherein the further straight line may be rotated by the edge region angle relative to the first straight line.

[0017] The second straight line can be rotated relative to the first straight line by a chamfering angle in the first rotational direction. The third straight line can also be rotated relative to the first straight line by a side edge angle in the first rotational direction. The other straight line can also be rotated relative to the first straight line by an edge area angle in the first rotational direction. The terms "first", "second", "third" and "other" are only used to identify the individual straight lines, and do not describe any specific orientation, arrangement and / or characteristics of the straight lines (beyond or deviating from the orientation, arrangement and / or characteristics of the explicitly described straight lines).

[0018] The profile extending substantially along a specific straight line may be a straight line that is rotated only by a small angle, for example less than 2°, relative to the specific straight line. The profile extending substantially along a specific straight line may have a section extending obliquely, but a large portion of the total length of the profile, for example more than 50%, has an inclination rate of less than 2° along the specific straight line. Preferably, the contact side profile extends along the first straight line with more than 50% of its length. Preferably, the chamfered edge profile extends along the second straight line with more than 50% of its length. Preferably, the side edge profile extends along the third straight line with more than 50% of its length. Preferably, the first section of the edge region profile extends along the other straight line with more than 50% of its length.

[0019] The tread block comprises a tread block surface. The tread block profile is one-dimensional and extends on the tread block surface. Furthermore, the tread block profile is perpendicular to a tread block profile vector and extends in an imaginary tread block profile plane, wherein the tread block profile vector is a normal vector on the tread block profile plane. The tread block profile vector preferably has no component in a radial direction. In other words, the tread block profile plane preferably comprises a radial direction. For example, the tread block profile vector may mainly point in an axial direction or mainly point in a circumferential direction. A vector mainly pointing in a specific direction encloses an angle of less than 45° with the specified direction. A plane mainly pointing in a specific direction has a vector mainly pointing in the specific direction as a normal vector.

[0020] The tread block surface may include a contact side, an edge region, a chamfer, and a side edge, wherein a contact side profile extends on the contact side, an edge region profile extends on the edge region, a chamfer profile extends on the chamfer, and a side edge profile extends on the side edge.

[0021] In particular, the normal vector on the contact side may point substantially outwards in radial direction; in the deployed state of the tread, the contact side lies substantially on the base surface. The contact side may be designed for direct contact with a road surface when the vehicle tire is in operation.

[0022] The tread block has a width extension dimension. The width extension dimension is one-dimensional and extends on the tread block surface. The width extension dimension may extend along one or more straight lines and / or be curved. The width extension dimension intersects the tread block contour at an intersection point. At the intersection point, the width extension dimension at least partially extends perpendicularly, preferably mainly perpendicularly to the tread block, and further preferably extends exactly perpendicularly to the tread block contour. For example, when the width extension dimension of the tread block extends mainly in the axial direction at the intersection point, the tread block contour may extend perpendicularly to the axial direction, or the tread block contour may extend perpendicularly to the width extension dimension.

[0023] The tread block may include a plurality of tread block profiles. The width extension dimension of the tread block may be tangent to the tread block profile according to the present invention at a plurality of different intersection points. The section of the width extension dimension formed by the intersection points may be extended with a group of tread block profiles to form a certain section of the tread block surface. The contact side, the edge area, the chamfer and the side edge may be arranged on the entire width extension dimension of the tread block or only along a part of the width extension dimension. In an embodiment of the present invention, the contact side, the edge area, the chamfer and the side edge are arranged at the portion where the width extension dimension of the tread block mainly extends in the axial direction. The tread block profile may present different or identical shapes at different intersection points along the width extension dimension.

[0024] The flank angle is preferably not significantly greater than 90°, in particular less than 95°; the flank angle may be between 60° and 90°, preferably between 77° and 90°. The chamfer angle may be between 20° and 70°, preferably between 35° and 55°. The edge region angle is preferably not greater than 90°; in particular, the edge region angle may be between 20° and 90°, preferably between 45° and 90°. The chamfer angle may be smaller than the flank angle, between 10° and 80°, preferably between 25° and 55°. The edge region angle may be different from the chamfer angle; in particular, the edge region angle may be larger than the chamfer angle, between 10° and 80°, preferably between 25° and 55°. This angle information preferably applies to a tread block profile extending perpendicularly to the width extension of the tread block at the intersection point.

[0025] The tread block may comprise a snow edge, wherein the edge region of the tread block surface and the surface of the snow edge may overlap. In particular, the edge region of the tread block surface and the surface of the snow edge may be identical, so that the edge region contour defines the contour of the snow edge.

[0026] The edge region height between at least one point on the edge region contour and the base surface can be between 0.1 mm and 1 mm, preferably between 0.2 mm and 0.5 mm. The edge region height can correspond to the protrusion of the snow edge on the contact side or on the base surface.

[0027] In particular, the first section of the edge region profile can extend at least partially above the base surface. Preferably, the first section of the edge region profile extends mainly above the base surface. In particular, the contact side profile can adjoin one end of the edge region profile at the same height as the chamfered profile adjoins the other end of the edge region profile, so that the first section of the edge region profile is completely above the base surface.

[0028] The edge area profile may comprise a second section, wherein the second section may extend substantially parallel to the base surface of the tread in the unfolded state of the tread. The length of the second section may be between 0.2 mm and 2 mm, preferably between 0.3 mm and 1 mm. This length information preferably applies to the tread block profile extending perpendicularly to the width extension of the tread block at the intersection point.

[0029] The edge area contour may include a third section, wherein the third section may enclose an angle with the perpendicular to the base surface. Alternatively, the third section may extend substantially parallel to the perpendicular to the base surface. The second section may adjoin the first section, wherein the third section may adjoin the second section with a first end and adjoin the contact side contour with a second end.

[0030] Due to the multiple corners and angles in the edge region profile, the snow traction properties of the vehicle tire can be further improved. In particular, in the region of the corners and angles, snow can adhere to the tire tread, whereby a snow grip can be formed between the vehicle tire and the snow-covered road surface.

[0031] The connecting line through the first point on the flank profile and the third point on the chamfer profile can intersect the edge region profile at a fourth point. This can be the case, for example, when the convex curvature of the tread block profile is reversed in the section between the chamfer profile and the edge region profile, so that the connecting line between the third point and the fourth point is concave. The chamfer profile can extend completely below the base surface, i.e. can be arranged completely in a concave section of the tread of the vehicle tire. The third point on the chamfer profile can be identical to the second point on the chamfer profile. This is particularly possible when the chamfer profile extends completely below the base surface.

[0032] In the unfolded state of the tread, the chamfered profile may extend 0.5 mm to 3 mm parallel to the base surface and 0.5 mm to 4 mm perpendicular to the base surface. Preferably, the chamfered profile extends 0.8 mm to 2 mm parallel to the base surface and 0.8 mm to 3 mm perpendicular to the base surface. This length information preferably applies to the tread block profile extending perpendicularly to the width extension of the tread block at the intersection point.

[0033] The tread may comprise two tread blocks, wherein a groove may be arranged between the two tread blocks. A one-dimensional groove profile may extend on the surface of the groove, wherein the groove profile may be located in the same imaginary plane as the tread block profile and may abut against the side edge profile.

[0034] In particular, the tread may comprise a plurality of tread blocks, wherein a plurality of grooves may extend between the tread blocks, and wherein the grooves may, for example, comprise grooves extending mainly in the circumferential direction and / or grooves extending mainly in the axial direction. In an embodiment of the invention, each groove may adjoin a tread block surface having a tread block profile according to the invention.

[0035] The tread block surface may comprise two side edges, two chamfers and two edge regions, wherein the edge region profile of the first edge region and the edge region profile of the second edge region may abut against the contact side profile relative to each other. Such an embodiment may be particularly advantageous in non-directional vehicle tires and in particular in the following cases, namely: the tread block profile plane mainly points in the axial direction; and the side edges, chamfers and edge regions on opposite sides of the tread block are at least partially loaded in the circumferential direction during braking and acceleration. Alternatively, the tread block surface of the tread block may comprise only one side edge, one chamfer and one edge region, on which the tread block profile according to the invention extends. In this case, the side edges, chamfers and edge regions are preferably arranged on the braking edges of the vehicle tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The invention is described below by way of example with reference to the accompanying drawings, in which:

[0037] Figure 1 schematically showing a perspective view of a vehicle tire having a tread and tread blocks;

[0038] Figure 2 Schematically showing the unfolded state Figure 1 the tread of a vehicle tire;

[0039] Figure 3 A perspective view schematically showing an embodiment of a tread block surface according to the present invention;

[0040] Figure 4a Show and according to Figure 3 The tread block profile corresponding to the tread block surface;

[0041] Figure 4b Alternative interpretation symbols are shown in Figure 4a The tread block profile shown in;

[0042] Figure 5 shows a tread block profile transitioning to a groove profile according to an alternative embodiment of the present invention;

[0043] Figure 6 shows a tread block profile according to another alternative embodiment of the invention, each having two side edge profiles, a chamfer profile and an edge area profile; and

[0044] Figure 7 A perspective view showing a tread having a plurality of tread blocks according to an embodiment of the present invention is shown.

[0045] List of Reference Numerals

[0046] 1...........Vehicle tires

[0047] 1a.............Tread

[0048] 1b..........Base

[0049] 3...........Tread block surface

[0050] 4...........Radial direction

[0051] 5...........Circumferential direction

[0052] 6...........Contact side

[0053] 7........Edge area

[0054] 7'..........Edge area

[0055] 8...........Chamfered

[0056] 8'..........Chamfered

[0057] 9...........Side edge

[0058] 9'.........Side edge

[0059] 10..........Tread block profile

[0060] 11..........Axial direction

[0061] 12..........Contact side profile

[0062] 13........Edge area outline

[0063] 13'.........Edge area outline

[0064] 13a.........Section 1

[0065] 13b............Second Section

[0066] 13c............Section 3

[0067] 13d.........Segment 4

[0068] 14..........Chamfered contour

[0069] 14'.........Chamfered profile

[0070] 14a.........Second point

[0071] 14b.........Third point

[0072] 15..........Side profile

[0073] 15'.........Side profile

[0074] 15a..............First point

[0075] 16..........First straight line

[0076] 17..........Second straight line

[0077] 18..........Chamfer angle

[0078] 19..........The third straight line

[0079] 20..........Side angle

[0080] 21........Another straight line

[0081] 22..........Edge area angle

[0082] 23........Edge area height

[0083] 24..........Snow Edge

[0084] 25.............Tread blocks

[0085] 26..........Grooves

[0086] 27..........Groove Profile

[0087] 28........Tread blocks

[0088] 29..........groove

[0089] 30..........Width extension

[0090] 31........Intersection

[0091] 32.......... Braking edge

[0092] 33..........Connect the straight lines DETAILED DESCRIPTION

[0093] A vehicle tire according to the invention is a tire of any type of construction, in particular a radial tire, and is a tire of any type, in particular a pneumatic vehicle tire for motor vehicles, such as passenger cars, light trucks or commercial vehicles.

[0094] Figure 1 A vehicle tire 1 with a tread 1a and tread blocks 2 is schematically shown. The pattern of the tread shown is to be understood as a general example of a tread pattern and does not necessarily have to have a specific applicability in conjunction with the teaching according to the invention. If the invention is to be used for the tread shown, both the tread blocks 2 adjoining each other due to transverse grooves in the shoulder and the ribs 2 in the middle region of the tread 1a adjoining each other due to circumferential grooves can be designed as tread blocks 2 according to the invention. Alternatively, the teaching according to the invention can also be applied to any other tread geometry with correspondingly alternatively arranged tread blocks 2.

[0095] Figure 2 Shown in expanded state Figure 1The tread 1a of a vehicle tyre 1 is shown. In the unfolded state, the tread 1a is unfolded or turned over from the vehicle tyre in the circumferential direction and in the axial or radial direction in such a way that the surface of the tread 1a substantially coincides with a flat plane. If, in the example shown, no grooves were provided in the tread 1a, or if these grooves were completely filled with material and the surface of the tread 1a would be flattened in this way, the surface of the tread 1a in the unfolded state would lie completely in a flat plane. The imaginary surface of the tread 1a (which would have been produced without taking into account any tread elements such as grooves or projections) is called the base surface 1b and, in the unfolded state of the tread 1a, likewise lies in a flat plane. Figure 2 shown.

[0096] Figure 3 A block surface 3 is shown on an embodiment of a tread block 2 according to the invention, the tread block having a side edge 9, a chamfer 8, an edge region 7 and a contact side 6. The contact side 6 points outwards in the radial direction 4 and is located in the base surface 1b of the tread 1a. The edge 9, the chamfer 8 and the edge region 7 point outwards in the radial direction 4 and / or in the circumferential direction 5. The edge region 7 coincides with the surface of the snow edge 24 of the tread block 2. In other words, according to the embodiment shown, the edge region 7 is identical to the surface of the snow edge 24. The tread block profile 10 extends perpendicularly to the axial direction 11. The tread block profile 10 comprises a contact side profile 12, an edge region profile 13, a chamfer profile 14 and a tread profile 15. The tread block surface 3 has a width extension 30, which extends parallel to the axial direction 11. The width extension 30 intersects the tread block profile 10 at a right angle at an intersection 31.

[0097] Figure 4a Show Figure 3 The tread block profile 10 is shown in FIG. 1 , wherein the drawing plane corresponds to the tread block profile plane. The contact side profile 12 adjoins the edge region profile 13, wherein the edge region profile 13 adjoins the chamfered edge profile 14, and wherein the chamfered edge profile 14 adjoins the side edge profile 15. The contact side profile 12 extends in the base surface 1 b, and the intersection line of the base surface with the drawing plane is at Figure 4a 1b. The edge region profile 13 extends at its maximum distance from the base surface 1b at an edge region height 23 above the base surface 1b. The tread block profile 10 has a convex curve between a first point 15a on the flank profile 15 and a second point 14a on the chamfer profile 14 below the base surface 1b. In other words, the flank profile 15 and the chamfer profile protrude from the tread block 2 between the first point 15a and the second point 14a in the circumferential direction 5 and in the radial direction 4 relative to the straight connecting line segment between these two points 14a, 15a.

[0098] In the embodiment shown, the connecting line 33 passing through the first point 15a and the third point 14b intersects the edge region profile 13 at the fourth point 13d. Here, between the third point 14a on the chamfered edge profile 14 and the fourth point 13d on the edge region profile 13, a concave section of the tread block profile 10 is produced. In the embodiment shown, the chamfered edge profile 14 also extends completely below the base surface 1b, and the second point 14a and the third point 14b arranged below the base surface 1b coincide. Therefore, in the embodiment shown, the straight connecting line segment between the first point 15a and the second point 14a is located on the connecting line 33 between the first point 15a and the third point 14b. The vertical distance of the convex curve from the straight connecting line segment (and in the embodiment shown also from the connecting line 33) is at least 0.3 mm, preferably between 0.5 mm and 1 mm.

[0099] The convex and / or concave curves of the tread block profile may also be rounded instead of Figure 4a However, in a preferred embodiment, each contour area extends at least partially along a straight line, as described below with reference to Figure 4b As described in more detail.

[0100] Figure 4b Show Figure 4a 1 , but with different auxiliary lines and reference numerals. Accordingly, the contact side profile 12 extends along a first straight line 16, wherein the first straight line 16 extends parallel to the circumferential direction 5. The chamfered edge profile 14 extends along a second straight line 17, wherein the second straight line 17 is rotated by a chamfer angle 18 relative to the first straight line 16. The side edge profile 15 extends along a third straight line 19, wherein the third straight line 19 is rotated by a side edge angle 20 relative to the first straight line 16. In the embodiment shown, the chamfer angle 18 is smaller than the side edge angle 20. A first section 13a of the edge region profile 13, which is adjacent to the chamfered edge profile 14, extends along a further straight line 21, wherein the further straight line 21 is rotated by an edge region angle 22 relative to the first straight line 16. The edge region angle 22 is different from the chamfer angle 18, so that an additional angle is generated between the first section 13a and the chamfered edge profile 14.

[0101] The edge region profile 13 comprises a second section 13b, wherein the second section 13b extends parallel to the circumferential direction 5. Furthermore, the edge region profile 13 comprises a third section 13c, wherein the third section 13c extends parallel to the radial direction 4. Figure 3In the illustrated embodiment, the second section 13b adjoins the first section 13a, wherein the third section 13c adjoins the second section 13b and the contact side profile 12. The contact side profile 12 adjoins the edge region profile 13 in the radial direction 4 at the same height at which the edge region profile 13 adjoins the chamfered profile 14. Therefore, according to the illustrated embodiment, the transition between the contact side profile 12 and the third section 13c on one side and the transition between the chamfered profile 14 and the first section 13a on the other side are arranged radially at the same height as the contact side profile 12. Furthermore, according to the illustrated embodiment, the first section 13a of the edge region profile 13 extends completely above the contact side profile 12 in the radial direction 4, and the second section 13b is located radially at the edge region height 23 above the contact side profile 12.

[0102] Figure 5 An alternative embodiment of a tread block profile 10 is shown, which has a contact side profile 12, an edge area profile 13, a chamfered edge profile 14 and a side edge profile 15. A groove 26 is arranged adjacent to the first tread block 2, which separates the first tread block 2 from the second tread block 25. In the embodiment shown, the groove 26 is perpendicular to the Figure 5 The drawing plane extends from the groove 26. On the surface of the groove 26 there extends a groove profile 27 which adjoins the side edge profile 15 of the tread block profile 10. Figure 5 , the block profile 10 according to the invention is provided only on the first tread block 2 and not on the second tread block 25 on the opposite side of the groove 26. The illustrated embodiment preferably relates to tread blocks 2, 25 of a directional tread; here, the braking characteristics can be significantly improved when the block profile according to the invention is provided only at the braking edge 32.

[0103] Figure 6 Another alternative embodiment of the tread block profile 10 is shown. Here, on the tread block surface 3, side edges 9, 9', chamfers 8, 8' and edge regions 7, 7' are arranged on both sides of the tread block 2, wherein the edge regions 7, 7' adjoin the contact side 6 opposite to each other. Figure 6 The tread block profile 10 shown in FIG. 1 comprises two side edge profiles 15, 15', two chamfered edge profiles 14, 14' and two edge regions 13, 13', wherein the edge regions 14, 14' adjoin the contact side profile 12 at opposite ends. The embodiment shown is particularly suitable for non-directional treads.

[0104] Figure 7A perspective view of a tread 1a with a plurality of tread blocks 2, 25, 28 according to another alternative embodiment of the invention is schematically shown. Between the tread blocks 2, 25, 28, grooves 26, 29 extend. The groove profile 27 of the groove 26 is adjoined by the side edge profile 15 of the tread block profile 10. In the illustrated embodiment, the groove profile 27 and the tread block profile 10 extend perpendicularly to the width extension 30 of the tread block 2 at the intersection 31.

Claims

1. A vehicle tire (1), comprising a tread (1a), the tread comprising at least one tread block (2), wherein the tread block profile (10) of the tread block (2) comprises a contact side profile (12), an edge region profile (13), a chamfer profile (14) and a side edge profile (15), wherein the contact side profile (12) adjoins the edge region profile (13), wherein the edge region profile (13) adjoins the chamfer profile (14), and wherein the chamfer profile (14) adjoins the side edge profile (15), wherein the contact side profile (12) extends substantially in a base surface (1b) of the tread (1a), wherein at least one point on the edge region profile (13) is located at an edge region height (23) above the base surface (1b), It is characterized in that The tread block profile (10) presents a convex curve between a first point (15a) on the side edge profile (15) and a second point (14a) on the chamfer profile (14) located below the base surface (1b).

2. The vehicle tire according to claim 1, characterized in that In the unfolded state of the tread (1a), the contact side profile (12) extends substantially along a first straight line (16), wherein the chamfered profile (14) extends substantially along a second straight line (17), wherein the second straight line (17) is rotated relative to the first straight line (16) by a chamfering angle (18), wherein the chamfering angle (18) is preferably between 20° and 70°, further preferably between 35° and 55°.

3. The vehicle tire according to claim 2, characterized in that The side edge profile (15) extends substantially along a third straight line (19), wherein the third straight line (19) is rotated relative to the first straight line (16) by a side edge angle (20), wherein the side edge angle is preferably less than 95°, further preferably between 60° and 90° and further preferably between 77° and 90°.

4. The vehicle tire according to claim 3, characterized in that The chamfer angle (18) is smaller than the side edge angle (20) and is preferably between 10° and 80°, more preferably between 25° and 55°, smaller than the side edge angle (20).

5. Vehicle tyre according to one or more of claims 2 to 4, characterised in that Adjacent to the chamfered edge contour (14) is a first section (13a) of the edge region contour (13), which first section extends substantially along a further straight line (21), wherein the further straight line (21) is rotated relative to the first straight line (16) by an edge region angle (22), and wherein the edge region angle (22) is different from the chamfered edge angle (18).

6. The vehicle tire according to claim 5, characterized in that The edge area angle (22) is not greater than 90° and is preferably between 20° and 90°, and more preferably between 45° and 90°.

7. Vehicle tyre according to one or more of claims 5 or 6, characterised in that The edge region angle (22) is greater than the chamfer angle (18) and is between 10° and 80°, preferably between 25° and 55°.

8. Vehicle tyre according to one or more of claims 5 to 7, characterised in that A first section (13a) of the edge region contour (13) extends at least partially above the base surface (1b).

9. Vehicle tyre according to one or more of claims 1 to 8, characterised in that The chamfered contour (14) extends completely below the base surface (1b).

10. Vehicle tyre according to one or more of claims 1 to 9, characterised in that A connecting straight line (33) passing through the first point (15a) on the side edge contour (15) and the third point (14b) on the chamfer contour (14) intersects the edge region contour (13) at a fourth point (13d).

11. The vehicle tire according to claim 10, characterized in that The third point (14b) coincides with the second point (14a).

12. Vehicle tyre according to one or more of claims 1 to 11, characterised in that The vertical distance of the convex curve from the straight line segment connecting the first point (15a) and the second point (14a) is at least 0.3 mm, preferably between 0.5 mm and 1 mm.

13. Vehicle tyre according to one or more of claims 1 to 12, characterised in that When the tread (1a) is in the unfolded state, the chamfered edge profile (14) extends 0.5 mm to 3 mm parallel to the base surface (1b) and 0.5 mm to 4 mm perpendicular to the base surface (1b), wherein preferably, the chamfered edge profile (15) extends 0.8 mm to 2 mm parallel to the base surface (1b) and 0.8 mm and 3 mm perpendicular to the base surface (1b).

14. Vehicle tyre according to one or more of claims 1 to 13, characterised in that The edge region height (23) is between 0.1 mm and 1 mm, preferably between 0.2 mm and 0.5 mm.

15. Vehicle tyre according to one or more of claims 1 to 14, characterised in that The edge area profile (13) includes a second segment (13b), wherein in the unfolded state of the tread (1a), the second segment (13b) extends essentially parallel to the base surface (1b) of the tread (1a), wherein the length of the second segment (13b) is between 0.2 mm and 2 mm, preferably between 0.3 mm and 1 mm.

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