Pneumatic vehicle tire

Abstract

The invention relates to a pneumatic vehicle tire (1) having a tread (6), shoulder portions (7), sidewall portions (8) having a sidewall profile (8a), a carcass (2) and bead regions (9) having bead cores (10), wherein the carcass ply (2a) runs between the bead regions (9) and is folded over around the bead cores (10), with the result that a carcass turn-up (12) forms axially on the outside, wherein a separator profile (14) is arranged between the carcass turn-up (12) and the carcass ply (2a). According to the invention, the pneumatic vehicle tire (1) has a protective layer (15) made of at least two protective plies with parallel textile reinforcing elements, wherein the protective layer (15) is embedded in the inner layer (5) and / or in the sidewall profile (8a) and / or in the separator profile (14).

Description

[0001] 202407412

[0002] Description

[0003] Vehicle pneumatic tires

[0004] The invention relates to a vehicle pneumatic tire according to the preamble of claim 1.

[0005] There are pneumatic tires specifically designed for use in mining or underground construction, also known as OTR tires or off-the-road tires. These tires are subject to an increased risk of damage. In particular, the sidewalls can be damaged by sharp or pointed objects, such as stones. A cut or tear caused by such an object can propagate through the rubber material of the tire, causing lasting damage and potentially leading to leakage as air enters the tire's interior.

[0006] The invention is based on the objective of providing a vehicle pneumatic tire, in particular an OTR vehicle pneumatic tire, which has a high cut resistance to external sharp-edged objects and therefore has increased durability, especially when used “off-the-road”, for example in mining or underground mining.

[0007] The task is solved by a vehicle pneumatic tire, in particular an OTR vehicle pneumatic tire, having at least the following features:

[0008] - a tread for contact with a driving surface, which radially outwards covers a belt bond consisting of at least one belt layer,

[0009] - Shoulder sections, each with at least one shoulder profile,

[0010] - Side wall sections, each with at least one side wall profile,

[0011] - a carcass consisting of at least one carcass ply with reinforcing material, wherein the carcass is sandwiched between a radially inner inner layer (inner liner)202407412

[0012] of the vehicle's pneumatic tire and the radially outer belt structure, and

[0013] - Bead areas with bead cores, wherein the at least one carcass ply runs continuously between the bead areas and is folded or turned around the bead cores from axially inside to axially outside, so that a carcass fold is formed axially outside, wherein a separator profile is arranged between the axially outside carcass fold and the axially inside carcass ply, preferably made of a rubber material, wherein the vehicle pneumatic tire further comprises a (completely circumferential in the direction of travel) protective layer of at least two protective layers, wherein within each protective layer textile reinforcement elements run parallel to each other independently of one another, and

[0014] wherein the protective layer is at least partially embedded or inserted or integrated into the inner layer and / or into the side wall profile and / or into the separator profile, preferably completely running in the direction of travel.

[0015] This inventive design increases the durability of the vehicle tire because the two-layer protective layer can completely and effectively prevent the propagation of a cut from the outside, for example by sharp or pointed objects, in the direction of travel. This is particularly advantageous for OTR (Off-the-Road) vehicle tires, which are often manufactured in a radial construction, meaning that the reinforcing elements in the tire carcass are aligned axially in at least one carcass layer. Such OTR tires are typically subjected to high stresses from sharp or pointed objects, so the cut resistance must be increased accordingly to prevent leakage and / or damage that would impair the tire's usability.This can be achieved in particular with a two-layer protective layer containing, or exclusively consisting of, textile reinforcements such as nylon, polyester, rayon, aramid, or similar materials, with a diameter, for example, between 0.5 mm and 0.7 mm. However, other materials and / or diameters are also possible. 202407412.

[0016] Preferably, the protective layer should also run continuously and without interruptions in a direction perpendicular to the direction of travel.

[0017] Accordingly, a continuous protective layer is provided, which is embedded in the respective component (inner layer and / or sidewall profile and / or separator profile) during its manufacture, so that no changes are necessary in the tire construction process itself after the individual tire components have been provided.

[0018] Preferably, it is also intended that

[0019] - the protective layer is completely embedded in the inner layer and / or in the side wall profile and / or in the separator profile, so that the protective layer is completely enclosed, or

[0020] - The protective layer is embedded at the edge into the inner layer and / or the sidewall profile and / or the separator profile in such a way that the protective layer makes surface contact with an adjacent component of the vehicle tire, for example, the shoulder profile and / or the carcass and / or the carcass high-profile. Depending on the application, various ways of embedding the protective layer into the respective component are conceivable in order to optimize the manufacturing process and also to ensure high durability during operation.

[0021] Preferably, the textile reinforcement elements in radially overlapping protective layers of the protective coating are not parallel to each other, but rather crossed. This ensures high stability while simultaneously effectively interrupting a propagating cut, thus preventing leakage and further damage.

[0022] In particular, it can be provided that the textile reinforcement elements within the respective protective layer run at an angle to the direction of travel. This enables particularly good stability and cut resistance. 202407412

[0023] Preferably, the protective layer extends radially below a distal end of the carcass ridge, with the protective layer, particularly when embedded in the separator profile, extending in some areas axially between the carcass ply and the carcass ridge. This creates an optimal transition between the areas where the carcass ridge provides protection or reinforcement in addition to the carcass ply, and the radially overlying area with only one carcass ply. It is particularly recommended that the distal end of the carcass ridge lies in the region of the tire equator of the vehicle tire, which improves stability.

[0024] Preferably, the protective layer, particularly when embedded in the inner layer, extends into the bead areas and / or the tread area in such a way that the protective layer is radially covered on the outside by the belt reinforcement. In this way, a larger area is covered by the protective layer, preventing propagating cuts from spreading further into the interior via the tread area and / or the bead area, thus further reducing the risk of leaks.

[0025] Preferably, the protective layer embedded in the inner layer extends continuously between the two bead areas. This also simplifies the production of the inner layer, as the protective layer does not need to be embedded in the inner layer in several sections. Furthermore, the protected area is increased.

[0026] Further features, advantages, and details of the invention will now be described in more detail with reference to the drawing, which schematically illustrates exemplary embodiments. The drawing shows

[0027] Fig. 1 shows a vehicle pneumatic tire according to a first embodiment; 202407412

[0028] Fig. 2 shows a vehicle pneumatic tire according to a second embodiment;

[0029] Fig. 3 shows a vehicle pneumatic tire according to a first embodiment; and

[0030] Fig. 4 shows a top view of a protective layer made from the vehicle pneumatic tires according to Figs. 1 to 3.

[0031] Figure 1 shows a partial cross-section of a vehicle tire 1, preferably of radial construction, which is particularly suitable for use in mining or underground mining or in comparable environments. Other applications are also possible, and the vehicle tire 1 can also be referred to as an OTR (Off the Road) vehicle tire 1, i.e., a vehicle tire 1 used off-road under special conditions. Radial construction means that the individual reinforcing elements of a carcass 2 of the vehicle tire 1 run in at least one carcass layer 2a in the axial direction A of the wheel axle or perpendicular to the direction of travel L of the vehicle tire 1.

[0032] The carcass 2 is positioned within a tread area 3 in the radial direction R between a belt structure 4 consisting of several belt layers 4a and an inner layer 5 (inner liner). Radially above the belt structure 4 is the tread 6, which, as shown in the example, is composed of two radially inner tread layers 6a1, 6a2 and one radially outer tread layer 6b.

[0033] Starting from the zenith of the vehicle tire 1, the carcass 2 is guided on both sides along the inner layer 5 via shoulder sections 7 with shoulder profiles 7a and sidewall sections 8 with sidewall profiles 8a to bead areas 9, in which it each surrounds at least one bead core 10 and a core profile 11 (here in two parts) located on the bead core 10 from axially inward to axially outward and each terminates in a carcass high-profile 12. The respective axially outward 202407412

[0034] The raised carcass rib 12 is folded back in such a way that it is protectively covered on the outside of the tire by a horn profile 13 and the sidewall profile 8a. A distal end 12a of the raised carcass rib 12 is preferably located axially below the respective sidewall profile 8a, for example in the area of ​​or radially above a tire equator.

[0035] A separator profile 14 adjoins the (two-part) core profile 11 between the axially inner carcass 2 or carcass ply 2a and the respective axially outer carcass high-lap 12. Thus, viewed axially A, the separator profile 14 lies between the two (2, 12) to separate the carcass high-lap 12 from the carcass 2. According to the illustrated embodiment, the separator profile 14 extends along the carcass 2 radially below the shoulder profile 7a and the edges of the belt 4, and therefore, in the radial direction R, higher than the distal end 12a of the carcass high-lap 12. As is well known, the construction of the pneumatic tire 1 may differ in some details, for example, in the number of plies or the axial and radial extent of the plies, from the illustrated embodiment.

[0036] The vehicle pneumatic tire 1, in particular the OTR vehicle pneumatic tire, is especially suitable for mining or underground mining and in comparable areas of application. In order to provide a certain degree of cut resistance, especially against sharp or pointed objects, such as stones, an additional continuous protective layer 15 is integrated into the vehicle pneumatic tire 1 in three different versions, which are shown in Figures 1 to 3.

[0037] The protective layer 15 is composed of textile reinforcing elements 15a, for example, nylon (PA6, PA6.6), polyester, rayon, aramid, or the like. The protective layer 15 is composed of at least two overlapping protective layers 16a, 16b (see Fig. 4), in which the textile reinforcing elements 15a run independently of each other, wherein the textile reinforcing elements 15a within a protective layer 16a, 16b

[0038] preferably run parallel to each other, for example at an angle to the direction of travel L of the vehicle's pneumatic tire 1.

[0039] Furthermore, the protective layers 16a, 16b of the protective layer 15 are positioned relative to each other such that the textile reinforcement elements 15a of radially overlapping protective layers 16a, 16b intersect, as indicated in Fig. 4, i.e., a so-called cross-bond or diagonal bond is formed. This creates a cut-resistant protective layer 15 that protects the vehicle tire 1 from further penetrating cuts or tears. The textile reinforcement elements 15a within the respective protective layer 15a can have a diameter of, for example, between 0.5 mm and 0.7 mm.

[0040] According to the different embodiments, the protective layer is 15:

[0041] - into the separator profile 14, as shown in Fig. 1, or

[0042] - into the side wall profile 8a, as shown in Fig. 2, or

[0043] - into the inner layer 5 (inner liner), as shown in Fig. 3,

[0044] integrated. This can be achieved by installing or embedding the protective layer 15 either centrally or at the edge of the respective component 14, 8a, 5 of the vehicle pneumatic tire 1, preferably during or after the manufacture of the respective component 14, 8a, 5. As indicated in Fig. 2, the protective layer 15 can, in the case of edge embedding, also contact at least one adjacent component of the vehicle pneumatic tire 1, for example, in Fig. 2 the shoulder profile 7a, the separator profile 14 and the inner tread layers 6a1, 6a2.

[0045] In the embodiments according to Figs. 1 and 2, the protective layer 15 extends at least within the sidewall sections 7, particularly in the area of ​​the tire equator, but also into the shoulder sections 8. The protective layer 15 thus extends into areas where the vehicle tire 1 is frequently struck by sharp or pointed objects during operation and is therefore susceptible to punctures. Such an arrangement of the protective layer 15 prevents a puncture from propagating into the interior I of the tire.

[0046] This prevents the vehicle pneumatic tire 1 from leaking and also protects the vehicle pneumatic tire 1 from major damage, thus increasing its durability.

[0047] In Fig. 3, the protective layer 15 extends within the inner layer 5 both into the bead areas 9 and in the tread area 3 radially under the belt reinforcement 4. Preferably, the protective layer 15 extends continuously within the inner layer 5 between the two bead areas 9, which simplifies manufacturing since the protective layer 15 does not need to be integrated into the inner layer 5 in multiple areas. Furthermore, the area protected by the protective layer 15 is extended so that any resulting cut cannot propagate into the interior I via the bead areas 9 and / or the tread area 3.

[0048] Reference symbol list

[0049] 1 vehicle pneumatic tire

[0050] 2 Carcass

[0051] 2a Carcass layer

[0052] 3. Running lane area

[0053] 4 Belt bandage

[0054] 4a Belt position

[0055] 5 Inner layer (inner liner)

[0056] 6 treads

[0057] 6a1 first radial inner tread layer

[0058] 6a2 second radial inner tread layer 6b radial outer tread layer

[0059] 7 Shoulder section

[0060] 7a Shoulder profile

[0061] 8 Side wall section

[0062] 8a Side wall profile

[0063] 9 bead area

[0064] 10 bead core

[0065] 11 Core profile

[0066] 12 Carcass high impact

[0067] 13 Horn profile

[0068] 14 Separator profile

[0069] 15 Protective layer

[0070] 15a Textile reinforcement of the protective layer 15 16a, 16b Protective layers of the protective layer 15

[0071] A axial direction

[0072] Interior

[0073] L Direction of travel

[0074] R radial direction

Claims

202407412 Patent claims 1. Vehicle pneumatic tires (1), in particular OTR pneumatic tires, comprising at least: - a tread (6) which covers a belt assembly (4) consisting of at least one belt layer (4a) on the radial outwards, - Shoulder sections (7) each with at least one shoulder profile (7a), - Sidewall sections (8) each with at least one sidewall profile (8a), - a carcass (2) consisting of at least one carcass layer (2a) with reinforcing elements, wherein the carcass (2) runs between a radially inner inner layer (5) of the vehicle pneumatic tire (1) and the radially outer belt assembly (4), and - Bead areas (9) with bead cores (10), wherein the at least one carcass ply (2a) runs continuously between the bead areas (9) and is folded over the bead cores (10) from axially inside to axially outside, so that an axially outside carcass upturn (12) is formed, wherein a separator profile (14) is arranged between the axially outside carcass upturn (12) and the axially inside carcass ply (2a), characterized by the fact that the vehicle pneumatic tire (1) further comprises a protective layer (15) consisting of at least two protective layers (16a, 16b), wherein within each protective layer (16a, 16b) textile reinforcement elements (15a) run parallel to each other independently of one another, and wherein the protective layer (15) is at least partially embedded in the inner layer (5) and / or in the side wall profile (8a) and / or in the separator profile (14), preferably completely in the running direction (L).

2. Vehicle pneumatic tire (1) according to claim 1, characterized by the fact that The protective layer (15) runs continuously and without interruption in a direction perpendicular to the direction of travel (L). 202407412 3. Vehicle pneumatic tires (1) according to claim 1 or 2, characterized by the fact that the protective layer (15) is completely embedded in the inner layer (5) and / or in the side wall profile (8a) and / or in the separator profile (14) so ​​that the protective layer (15) is completely enclosed, or the protective layer (15) is embedded at the edge in the inner layer (5) and / or in the sidewall profile (8a) and / or in the separator profile (14) in such a way that the protective layer (15) touches a respective adjacent component of the vehicle pneumatic tire (1), for example the shoulder profile (7a) and / or the carcass (2) and / or the carcass high edge (12).

4. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that the textile reinforcement elements (15a) in radially superimposed protective layers (16a, 16b) of the protective layer (16) do not run parallel to each other, but are preferably crossed to each other.

5. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that the textile reinforcement elements (15a) within the respective protective layer (16a, 16b) run at an angle to the direction of travel (L).

6. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that the protective layer (15) extends radially below a distal end (12a) of the carcass uplift (12), wherein the protective layer (15) extends, particularly when embedded in the separator profile (14), in some areas axially between the carcass layer (2a) and the carcass uplift (12a).

7. Vehicle pneumatic tire (1) according to claim 6, characterized by the fact that 202407412 the distal end (12a) of the carcass high-profile (12) lies in the region of a tire equator of the vehicle pneumatic tire (1).

8. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that The protective layer (15) extends into the bead areas (9) and / or into the tread area (3) when embedded in the inner layer (5) until the protective layer (15) is radially covered on the outside by the belt banding (4).

9. Vehicle pneumatic tire (1) according to claim 8, characterized by the fact that the protective layer (15) embedded in the inner layer (5) runs continuously between the two bead areas (9).

10. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that the textile reinforcement elements (15a) of the protective layer (15) contain nylon, polyester, rayon, aramid or the like, and in particular are made exclusively from these materials.

11. Vehicle pneumatic tire (1) according to one of the preceding claims, characterized in that Strength carriers in the carcass (2) of the vehicle pneumatic tire (1) in at least one carcass layer (2a) in the axial direction (A) extend to form a vehicle pneumatic tire (1) in a radial design.

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