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DE-102018210580-B4 - Vehicle pneumatic tires

DE102018210580B4DE 102018210580 B4DE102018210580 B4DE 102018210580B4DE-102018210580-B4

Abstract

Vehicle pneumatic tires with a tread (2), bead areas and two sidewalls (4, 4'), wherein at least one of the two sidewalls (4, 4') has a protective element (5, 5') that protects against abrasion, extends around the sidewall (4, 4') and locally thickens the sidewall (4, 4'), and is provided with a structure (8) comprising a plurality of radially extending grooves (9) having a width (b 1 ) of 0.5 mm to 1.0 mm, between which preferably rectangular, radially elongated surfaces (10) are located, having a width (b 2 ) of 3.0 mm to 10.0 mm, characterized in that the grooves (9) include those which extend at particularly regular intervals and which are each interrupted at least at one point in their course by a connecting rib (11) formed flush with the surfaces (10), which has a width (b 3 ) has a diameter of 0.3 mm to 0.7 mm.

Inventors

  • Stefan Rittweger
  • Ralf Schütte

Assignees

  • CONTINENTAL REIFEN DEUTSCHLAND GMBH

Dates

Publication Date
20260513
Application Date
20180628

Claims (9)

  1. Vehicle pneumatic tires with a tread (2), bead areas and two sidewalls (4, 4'), wherein at least one of the two sidewalls (4, 4') has a protective element (5, 5') that protects against abrasion, extends around the sidewall (4, 4') and locally thickens the sidewall (4, 4'), and is provided with a structure (8) comprising a plurality of radially extending grooves (9) having a width ( b1 ) of 0.5 mm to 1.0 mm, between which preferably rectangular, radially elongated surfaces (10) are located, having a width ( b2 ) of 3.0 mm to 10.0 mm, characterized in that the grooves (9) include those which extend at particularly regular intervals and which each at least at one point in their course are formed by a surface flush with the surfaces (10). The connecting web (11) is interrupted, which has a width (b 3 ) of 0.3 mm to 0.7 mm.
  2. Vehicle pneumatic tires Claim 1 , characterized in that each groove (9) is interrupted at least at one point in its course by a connecting web (11) formed at the same level as the surfaces (10).
  3. Vehicle pneumatic tires Claim 1 , characterized in that every second or third groove (9) is interrupted at least at one point in its course by a connecting web (11) formed at the same level as the surfaces (10).
  4. Vehicle pneumatic tires according to one of the Claims 1 until 3 , characterized in that the grooves (9) have a depth (t) of up to 1.5 mm, in particular up to 0.8 mm.
  5. Vehicle pneumatic tires according to one of the Claims 1 until 4 , characterized in that the protective element (5) is formed on the sidewall (4) in the area of the greatest cross-sectional width of the tire.
  6. Vehicle pneumatic tires according to one of the Claims 1 until 4 , characterized in that the protective element (5') on the side wall (4) is formed radially inside or radially outside the point with the greatest cross-sectional width of the tire.
  7. Vehicle pneumatic tires according to one of the Claims 1 until 6 , characterized in that the protective element (5) has its greatest thickness (d 1 ) at a point and with respect to an imaginary outer contour without protective element (5), wherein the protective element (5) has an edge (6) circumferentially around the tire circumference at this point, which is formed by the thickness of the protective element (5) decreasing continuously from this point towards the tread (1) and towards the bead area, wherein connecting webs (11) in the grooves (9) preferably connect directly to the edge (6).
  8. Vehicle pneumatic tires according to one of the Claims 1 until 6 , characterized in that the protective element (5') has a constant or largely constant thickness (d 1 ') over its radial extent with respect to an imaginary outer contour without protective element (5').
  9. Vehicle pneumatic tires according to one of the Claims 1 until 8 , characterized in that the protective element (5, 5') extends in a radial direction over 15 mm to 90 mm, preferably over 30 to 45 mm, particularly preferably over 38 mm to 42 mm.

Description

The invention relates to a vehicle pneumatic tire with a tread, bead areas and two sidewalls, wherein at least one of the two sidewalls has a protective element that protects against abrasion, surrounds the sidewall and locally thickens the sidewall, and is provided with a structure consisting of a plurality of radially extending grooves having a width of 0.5 mm to 1.0 mm, between which there are preferably rectangular, radially elongated surfaces having a width of 3.0 mm to 10.0 mm. Protective elements on sidewalls are typically rubber ribs formed on the respective sidewall, encircling its circumference and locally thickening the sidewall. These protective elements protrude outwards from the rest of the sidewall contour and are dimensioned in such a way as to intercept and prevent abrasion and resulting damage to the tire in the sidewall area. A vehicle pneumatic tire of the type mentioned above is, for example, made from the JP 2006 213 128 A It is known that at least one sidewall of this tire is provided, in the area of its greatest cross-sectional width, with a rubber protective layer that circumferentially encircles the sidewall and thickens locally. This protective layer has a thickness between 1.0 mm and 5.0 mm and a radial extent between 10.0 mm and 50.0 mm. This rubber protective layer is provided with numerous radially extending grooves, ranging in width from 0.2 mm to 2.0 mm and in depth from 1.0 mm to 5.0 mm. These very narrow grooves can be closely spaced or have a spacing of 4.0 mm to 10.0 mm. From the EP 2 255 979 A2 A vehicle pneumatic tire with sidewalls is known, wherein a circumferential protective element is provided on one sidewall, locally thickening the sidewall. This protective element is formed from circumferentially spaced, trapezoidal cross-section ribs and grooves running between the ribs. Such protective elements are intended to be advantageous for venting the vulcanization mold. The EP 2 055 507 A1 Disclosing a vehicle pneumatic tire with sidewalls, at least one of which is provided with a circumferentially circumferential protective element formed by a lower, closed circumferential rib and several webs adjoining it, spaced apart from one another in the circumferential direction and extending perpendicular to the circumferential direction. Such protective elements are intended to have a low rubber volume and to stiffen the sidewall area. From the JP H08 282 219 A A vehicle tire is known with sidewalls on which narrow ribs run spaced apart in the circumferential direction. Viewed in the tire cross-section, the ribs are curved at their base, which lies against the sidewall, along a radius that differs from the radius of the sidewall in the tire cross-section. During the manufacture of the vehicle tire, such ribs are intended to conceal irregularities on the sidewall. The JP 2009 090 950 A Disclosing a vehicle tire with sidewalls having a decorative surface element on one of the sidewalls, wherein the surface element is provided with parallel, triangular-shaped elevations with a height of 0.1 mm to 1.0 mm. From the DE 10 2014 206 912 A1 A vehicle tire is known with sidewalls reinforced in their radially outer area with a protective rubber layer. The protective layer has a thickness of up to 4.0 mm at its thickest point and is provided with a network of cuts consisting of at least one circumferentially circular cut and a plurality of transverse cuts, thus forming block elements. The rubber protective layer is intended, for example, to provide protection when driving off-road and not to impair the rolling resistance of the vehicle tire. The narrow grooves and the relatively wide rectangular areas between them result in a protective element designed with a material distribution that positively impacts the flexibility and durability of the tire sidewall. Furthermore, the structure of the protective element has proven particularly suitable for concealing sidewall indentations – constrictions at the overlapping points of the tire carcass. However, the venting of the vulcanization mold in its side shells, which forms the sidewalls of a raw tire with such a design, has proven problematic. If sufficient air release between the raw tire and the vulcanization mold cannot be ensured during the molding process, the visual appearance of the structure on the protective element is compromised. The invention is therefore based on the objective of finding measures which This allows for proper venting of the vulcanization mold forming the raw tire without having to accept any impairment of the aforementioned design of the structure on the protective elements of the sidewalls. The problem set out in the invention is solved by including grooves which run at regular intervals and which are interrupted at least at one point in their course by a connecting web which is level with the surfaces and has a width of 0.3 mm to 0.7 mm. The connecting ribs formed in the grooves are created by corresponding reces