High-speed high-load loading radial tire

Abstract

The invention relates to a high-speed high-load truck radial tire which comprises a tire crown, the tire crown comprises a steel wire winding structure or a fiber crown strip net-shaped winding structure, and the steel wire winding structure is prepared through the following method that a plurality of steel wires are arranged side by side; the steel wire winding structure is obtained by performing online winding after extruding the steel wire adhesive tape through online adhesive coating or performing offline winding after extruding the steel wire adhesive tape offline. The high-speed and high-load loading radial tire has good durability and high-speed performance, the service life of the tire is prolonged, the tire replacement frequency is reduced, and the special requirements of urban traffic vehicles running on special cement reinforcement square stand column pavements can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of tires, and particularly relates to a high-speed and high-load radial tire for urban transportation vehicles running on a special cement-reinforced square column road surface. Background Art

[0002] With the rapid development of the urbanization process, urban traffic problems have become increasingly prominent. Developing a new urban traffic system has become an important research direction for solving urban traffic problems. An urban transportation vehicle running on a special cement-reinforced square column road surface has emerged. This urban transportation vehicle can effectively utilize the three-dimensional space, reduce ground occupation, and at the same time achieve efficient and fast load transportation by straddling the entire train on the cement-reinforced square column road surface. However, this new traffic system poses extremely high requirements for the performance of the supporting tires. Especially under the conditions of high load, high speed operation, and long-term use, the existing tire technology is difficult to meet its needs.

[0003] Currently, radial load tires are mainly used for heavy trucks and engineering vehicles. By adopting a high-strength steel cord skeleton and wear-resistant rubber materials, they provide excellent load-bearing capacity and durability. However, since the single-tire load of the urban transportation vehicle running on the special cement-reinforced square column road surface reaches 6800 kg, far exceeding the load range of the same-size radial load tires, but the tire specification size still needs to be kept within the range of radial load tires, which poses a great challenge to the tire material, structural design, and molding process. Moreover, the urban transportation vehicle runs at a speed of 80 - 100 km / h for a long time every day for 16 hours, and the single-tire driving mileage per year is more than 18 kilometers, which puts higher requirements on the high speed, wear resistance, durability, and anti-fatigue performance of the tires. Refer to the attached Figure 1 Distribution diagram of vehicle tires on the vertical and side surfaces of the square cement column. Each carriage of the urban transportation vehicle has four load-bearing tires 300 at the front and rear axles of each carriage, and the two tires of each axle are installed side by side at the bottom of the carriage, directly above the cement-reinforced square column 100 road surface. When the vehicle turns, it relies on the small-diameter solid tires 200 distributed in a triangular shape at the corresponding positions on both sides of the cement-reinforced square column of each axle for steering and stability. Therefore, the load-bearing and driving functions of the supporting tires in the vertical direction still need to be optimized to prevent the vehicle from tipping over and ensure safe operation.

[0004] Therefore, the existing radial load tires are difficult to meet the special needs of urban transportation vehicles running on the special cement-reinforced square column road surface. There is an urgent need to develop a supporting tire perpendicular to the cement-reinforced square column road surface to solve the technical problems of urban transportation vehicles running at high speed, high load, and under special road surface conditions. Summary of the Invention

[0005] Aiming at the technical problem that existing radial tires for load-carrying vehicles are difficult to meet the special requirements of urban transit vehicles traveling on special cement-reinforced square column pavements, the present invention provides a high-speed and high-load radial tire for load-carrying vehicles, which has good durability and high-speed performance, extends the tire life, reduces the tire replacement frequency, and can also avoid problems such as component delamination caused by pollution of traditional bonding components and tire carcass wire drawing and bursting under high speed and high load, and can meet the special requirements of urban transit vehicles traveling on special cement-reinforced square column pavements.

[0006] The present invention provides a high-speed and high-load radial tire for load-carrying vehicles, including a crown, and the crown includes a steel wire winding structure or a fiber crown strip mesh winding structure. Among them, the steel wire winding structure is prepared by the following method: arranging multiple steel wires side by side, extruding a steel wire rubber strip online through online rubber application and then winding it online or extruding a steel wire rubber strip offline and then winding it offline to obtain the steel wire winding structure. By setting a steel wire winding structure or a fiber crown strip mesh winding structure in the crown of the high-speed and high-load radial tire of the present invention, replacing the traditional belt layer structure, it can enhance the crown rigidity, improve the high-speed performance and high-load performance of the tire, optimize the stress distribution, and enhance the durability of the tire.

[0007] In some embodiments, the tensile strength of the rubber compound in the steel wire rubber strip is 25-35 MPa, the elongation at break is 300%-400%, and the hardness is 48-65 Shore hardness. The high-speed and high-load radial tire of the present invention uses the above rubber compound for steel wire rubber strip extrusion, which has good adhesion and bonding force with the steel wire, and good bonding force with adjacent components such as the belt layer, tread and carcass.

[0008] In some embodiments, the single wire diameter of the steel wire in the steel wire winding structure is ≤1.37 mm, the minimum breaking force is ≥1200 N, and the linear arrangement density is 40-50 wires / 10 cm. By using steel wires with a relatively thin single wire diameter, strong rigidity, large elongation, good flexibility and resistance to flexure to extrude and then wind to obtain the steel wire winding structure, the high-speed and high-load radial tire of the present invention can enhance the crown strength, improve the load-bearing capacity of the tire, and improve the vehicle handling performance.

[0009] In some of these embodiments, the steel wire winding structure includes one or two layers of steel wire winding layers, and both ends of the steel wire winding layer are two-layer steel wire overlapping winding structures. The two-layer steel wire overlapping winding structure at both ends of the steel wire winding layer can disperse the stress at the crown end, prevent cord cracking, reduce shoulder deformation, and improve the high-speed performance of the tire. The steel wire winding structure adopts different winding methods according to the tire speed and load. When the tire speed is 70 - 80 km / h and the load is 4500 - 5500 kg, both ends of the steel wire winding layer are two-layer steel wire overlapping winding structures. The widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer are equal, symmetrically distributed, and the sum of the widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer is equal to the width of the steel wire winding layer; when the tire speed is 80 - 90 km / h and the load is 5500 - 6000 kg, the widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer are equal, symmetrically distributed, and the sum of the widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer is less than the width of the steel wire winding layer; when the tire speed is 90 - 100 km / h and the load is 6000 - 6900 kg, a winding method with the width decreasing layer by layer from the bottom layer to the outermost layer is adopted.

[0010] In some of these embodiments, a steel wire belt layer is provided between the steel wire winding layer and the carcass, and the difference level between the steel wire winding layer and the adjacent steel wire belt layer is 10 - 15 mm; a buffer belt layer is applied above the steel wire winding layer, and the difference level between the steel wire winding layer and the adjacent buffer belt layer is 10 - 15 mm. In the high-speed and high-load radial tire of the present invention, a relatively soft and impact-resistant steel cord layer is applied above the steel wire winding layer, which can play a role in stress buffering and protection.

[0011] In some of these embodiments, the fiber cap strip mesh winding structure is prepared by the following method: arranging multiple fibers side by side and extruding fiber rubber strips through on-line rubber application, and according to programming control, winding the fiber rubber strips in a single-loop winding manner and weaving them into a mesh structure through multiple layers of winding. The high-speed and high-load radial tire of the present invention adopts the on-line extrusion and on-line winding process to ensure the freshness of the rubber strips, prevent external pollution, and can improve the adhesion between the rubber strips and adjacent components such as the belt layer, tread, and carcass; replacing the traditional steel wire structure belt layer with the fiber cap strip mesh winding structure obtained by the above preparation method can reduce the rolling resistance of the tire and improve the handling stability of the tire.

[0012] In some of these embodiments, the tensile strength of the rubber compound in the fiber rubber strip is 22 - 32 MPa, the elongation at break is 310% - 420%, and the hardness is 45 - 62 Shore hardness. The high-speed and high-load radial tire of the present invention adopts the above rubber compound for fiber rubber strip extrusion, which has good adhesion and bonding force with the fiber and good bonding force with adjacent components such as the belt layer, tread, and carcass.

[0013] In some of these embodiments, the width of the fiber crown strip mesh winding structure decreases from the bottommost layer to the outermost layer, which can optimize the stress distribution and improve the durability of the tire.

[0014] In some of these embodiments, it further includes a bead, and the bead includes a bead wire; a chafer, disposed above the bead wire, and the outer side of the chafer is coated with a carcass ply; a steel reinforcement layer, coated on the outer sidewall of the carcass ply; and two layers of nylon ply, cross-stitched and attached to the outer side of the steel reinforcement layer at an angle of 30° to 45°. By adding two layers of nylon ply cross-stitched and attached at an angle of 30° to 45° at the bead of the high-speed high-load radial tire of the present invention, the turned-up ends of the carcass and the straight-up and turned-up ends of the steel reinforcement layer at the bead are protected, preventing the wire drawing of the carcass wires and the internal cracking of the steel reinforcement layer.

[0015] In some of these embodiments, the edge difference between the two layers of nylon ply is 10 - 20 mm, and the width of each layer of nylon ply is 100 - 120 mm. By defining the edge difference and width of the nylon ply, the present invention can optimize the stress distribution and ensure that the nylon ply fits better on the outer side of the bead steel reinforcement layer.

[0016] Based on the above technical solutions, compared with the prior art, the advantages and positive effects of the high-speed high-load radial tire of the present invention are as follows:

[0017] (1) The tread of the high-speed high-load radial tire of the present invention includes a steel wire winding structure or a fiber crown strip mesh winding structure obtained by an on-line extrusion and on-line winding process, replacing the traditional steel belt layer structure, which can enhance the tread rigidity, improve the high-speed performance and high-load performance of the tire, optimize the stress distribution, enhance the durability of the tire, and extend the service life of the tire.

[0018] (2) The rubber compound in the steel wire rubber strip used in the high-speed high-load radial tire of the present invention has good adhesion and bonding force with the steel wire, and has good bonding effects with the adjacent belt layers, tread, carcass and other components above and below, which can enhance the structural stability of the tire, improve the durability and load performance of the tire, and extend the service life of the tire; the rubber compound in the fiber rubber strip used in the present invention has good adhesion and bonding force with the fiber, and has good bonding effects with the adjacent belt layers, tread, carcass and other components above and below, which can enhance the structural stability of the tire, improve the durability and load performance of the tire, and extend the service life of the tire.

[0019] (3) By adding two layers of nylon protective fabrics that are cross - laminated at 30° - 45° at the bead of the high - speed, high - load radial tire of the present invention, the reverse - wrapped endpoints of the carcass and the straight - wrapped and reverse - wrapped endpoints of the steel wire reinforcement layer at the bead are protected, preventing the wire drawing of the carcass steel wire and the internal cracking of the steel wire reinforcement layer, which is beneficial to improving the stability of the tire and extending the service life of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 Distribution diagram of vehicle tires, vertical and side views of a square cement column with tires;

[0022] Figure 2 Schematic structural diagram of one embodiment of the high - speed, high - load radial tire of the present invention;

[0023] Figure 3 Cross - sectional view of one winding method of the high - speed, high - load radial tire of the present invention;

[0024] Figure 4 Cross - sectional view of another winding method of the high - speed, high - load radial tire of the present invention;

[0025] Figure 5 Cross - sectional view of the third winding method of the high - speed, high - load radial tire of the present invention;

[0026] Figure 6 Schematic structural diagram of another embodiment of the high - speed, high - load radial tire of the present invention;

[0027] In each of the drawings: 100, square cement steel column; 200, solid tire; 300, load - bearing tire, 310, tread crown, 311, first belt layer, 312, second belt layer, 313, steel wire winding structure, 314, fiber crown belt strip network winding structure, 315, buffer belt layer; 320, carcass, 321, carcass ply; 330, bead, 331, bead wire, 332, triangle rubber, 333, steel wire reinforcement layer, 334, first nylon protective fabric, 335, second nylon protective fabric. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, high speed means that the maximum driving speed of the tire is 10 km / h or 20 km / h higher than the maximum speed corresponding to the same specification tire, and high load means that the load-bearing capacity of the tire is 2.1 times or more higher than the maximum load corresponding to the highest ply rating of the same specification tire according to the national standard; the belt drum means the drum for applying the belt layer during the tire forming process.

[0032] The high-speed and high-load radial truck tire of the present invention refers to the support tire of an urban traffic vehicle traveling on a special cement-reinforced square column pavement. The tire specifications are selected as the 70 series of metric radial truck tires and the 305 / 70R22.5 and 305 / 70R22 tires within the 15° rim range. The specific dimensions, loads, air pressures and speed ratings are shown in Table 1:

[0033] Table 1 Tire Specification Parameter Table of the Present Invention

[0034]

[0035] Note 1: Maximum overall width of new tire = Design section width of new tire × 1.04; Minimum overall width of new tire = Design section width of new tire × 0.96; Maximum outside diameter of new tire = 2 × Design section height of new tire × 1.03 + Nominal rim diameter; Minimum outside diameter of new tire = 2 × Design section height of new tire × 0.97 + Nominal rim diameter; Design section height of new tire = (Inflated outside diameter of new tire - Nominal rim diameter) / 2; The corresponding relationship between rim diameter code and nominal rim diameter value is: 22.5 in corresponds to 572 mm, and 22 in corresponds to 559 mm;

[0036] Note 2: The maximum load capacity for actual vehicle use is 6800 kg for a single tire. The load capacity corresponding to load index 175 is 6900 kg, and the load capacity corresponding to load index 174 is 6700 kg. Since there is no integer load index corresponding to 6800 kg, load index 175 is used in the above table.

[0037] Note 3: The allowable rim size is 8.25 in.

[0038] The selected rim types for the assembly of the tires of the present invention are: for 305 / 70R22.5, a 15° deep groove rim is selected; for 305 / 70R22, a 5° flat bottom rim is selected.

[0039] The high-speed and high-load radial tire of the present invention includes a tread crown 310, and the tread crown 310 includes a steel wire winding structure 313 or a fiber crown belt strip mesh winding structure 314. By using the steel wire winding structure 313 or the fiber crown belt strip mesh winding structure 314 to replace the traditional steel belt layer structure, the present invention can enhance the rigidity of the tread crown 310, improve the high-speed performance and high-load performance of the tire, optimize the stress distribution, enhance the durability of the tire, and extend the service life of the tire.

[0040] As attached Figure 2As shown, in a schematic embodiment of the high-speed and high-load radial tire of the present invention, the crown 310 of the high-speed and high-load radial tire of the present invention includes a steel wire winding structure 313. The steel wire winding structure 313 includes 1 to 2 layers of steel wire winding layers, and both ends of the steel wire winding layer are two-layer steel wire overlapping winding structures, which can disperse the stress at the crown end, prevent cord cracking, reduce shoulder deformation, and improve the high-speed performance of the tire. The number of layers of the steel wire winding layer of the present invention is determined according to the load and speed of the tire: when the load of the tire < 100% of the standard load, or the speed ≤ 80 km / h, one layer of steel wire winding layer is added; when the load of the tire ≥ 100% of the standard load or the speed > 80 km / h, two layers of steel wire winding layers are added. The steel wire winding structure 313 adopts different forms of on-line winding methods according to different tire speeds and loads: when the tire speed is 70 - 80 km / h and the load is 4500 - 5500 kg, both ends of the steel wire winding layer are two-layer steel wire overlapping winding structures, the widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer are equal, symmetrically distributed, and the total width of the steel wire overlapping winding layers at both ends of the steel wire winding layer is equal to the width of the steel wire winding layer. The winding cross-sectional view is as shown in the appendix Figure 3 As shown, a represents the widest winding layer, b represents the repeated winding layers with equal widths, symmetrically arranged; when the tire speed is 80 - 90 km / h and the load is 5500 - 6000 kg, the widths of the steel wire overlapping winding layers at both ends of the steel wire winding layer are equal, symmetrically distributed, and the total width of the steel wire overlapping winding layers at both ends of the steel wire winding layer is less than the width of the steel wire winding layer. The winding cross-sectional view is as shown in the appendix Figure 4 As shown, c represents the widest winding layer, d represents the repeated winding layers with equal widths, symmetrically arranged; when the tire speed is 90 - 100 km / h and the load is 6000 - 6900 kg, a winding method with the width decreasing from the bottom layer to the outermost layer is adopted. The winding cross-sectional view is as shown in the appendix Figure 5 As shown, f is the total width of the bottom layer winding, and e is the total width of the outermost layer winding.

[0041] The single wire diameter of the steel wire of the steel wire winding structure 313 of the present invention ≤ 1.37 mm, the minimum breaking force ≥ 1200 N, the wire arrangement density is 40 - 50 wires / 10 cm, and the width difference level between the two steel wire winding layers is 10 - 15 mm. Preferably, the steel wire model is 3×7×0.20HE. The present invention obtains the steel wire winding structure 313 by extruding and then winding steel wires with a relatively thin single wire diameter, which has strong rigidity, large elongation, good flexibility, and resistance to flexure, can enhance the crown strength, improve the load-bearing capacity of the tire, and improve the vehicle handling performance.

[0042] The steel wire winding structure 313 of the present invention is prepared by the following method:

[0043] In the bare auxiliary drum, the first belt layer 311 and the first belt layer 312 are respectively laid;

[0044] According to the requirements of tire speed and load, 3 to 6 steel wires are arranged side by side, the wire arrangement density is 40 to 50 wires / 10 cm, and the wire rubber strip with a width of 10 to 12.5 mm is extruded online with rubber. The steel wire winding crown belt strip used for winding is prepared by special online extrusion and then the winding is completed through an online winding device, or the steel wire winding crown belt strip used for winding is prepared by special offline extrusion and then the winding is completed through an offline winding device. During the winding process, the rubber strip has a tension of 10 to 30 N.

[0045] The above preparation method of the present invention ensures the freshness of the rubber strip through the online extrusion and online winding process, prevents external pollution, and can improve the adhesion between the rubber strip and adjacent components such as the belt layer, tread and carcass. A steel wire belt layer is provided between the steel wire winding layer of the present invention and the carcass 320, and the difference level between the steel wire winding layer and the adjacent steel wire belt layer is 10 to 15 mm; a buffer belt layer 315 is applied above the steel wire winding layer, and the difference level between the steel wire winding layer and the adjacent buffer belt layer 315 is 10 to 15 mm. The high-speed and high-load radial tire of the present invention can play a role in stress buffer protection by applying a relatively soft and strong impact-resistant steel cord layer above the steel wire winding layer. When the winding method with the width decreasing layer by layer from the bottom layer to the outermost layer as shown in the appendix Figure 5 is adopted, the laying of the buffer layer belt layer 315 is no longer carried out above the steel wire winding layer.

[0046] As shown in the appendix Figure 6As shown, in another exemplary embodiment of the high-speed and high-load radial tire of the present invention, the crown 310 of the high-speed and high-load radial tire of the present invention includes a fiber crown belt strip network winding structure 314, which is woven by an on-line fiber extrusion and on-line winding process. Specifically, it includes the following steps: 6 to 9 fibers are arranged side by side, extruded with rubber on-line to form a fiber rubber strip with a width of 10 to 12.5 mm, and wound into an S shape in a single loop through programming. A special on-line extrusion and on-line winding device is used for network structure winding. During the winding process, the rubber strip has a tension of 10 to 15 N. The specific number of winding layers of the fiber crown belt strip network winding structure 314 of the present invention is determined by the single-tire load and speed, generally 4 to 8 layers. And the width of each layer decreases from the bottom layer to the outermost layer. The specific width of each layer is determined by the tire size and the width of the tire tread. The total number of winding layers is determined by the tire load and speed. Generally, the greater the load and the higher the speed, the more layers; conversely, the fewer layers. The number of layers of the fiber crown belt strip network winding structure 314 of the present invention is determined according to the tire load and tire speed: when the tire load < 100% of the standard load or the speed ≤ 80 km / h, four layers of fiber crown belt strip network structures are added; when the tire load ≥ 100% of the standard load or the speed > 80 km / h, eight layers of fiber crown belt strip network structures are added.

[0047] In the steps of the preparation method of the above-mentioned steel wire winding structure 313 and fiber crown belt strip network winding structure 314 of the present invention, the on-line extrusion and on-line winding equipment used is a special extrusion and winding integrated machine provided beside the auxiliary drum of the forming equipment. The rubber compound extruded by the extruder is introduced into the equipment for applying steel wires for application. The steel wire rubber strip after application is transported to the belt layer laminating drum for winding; the winding machine is equipped with a winding head, and the winding head is configured with an automatic cutting device for steel wire crown belt and nylon crown belt. After winding, cutting can be carried out; the winding head is controlled by a servo motor with a brake and can move closer to or away from the belt drum to adjust the distance between the laminating roller of the winding head and the laminating position of the belt drum, and can adapt to winding with different belt diameters; the tension device is next to the winding head to control the actual tension of winding to the greatest extent. Among them, the tension of the rubber strip during steel wire winding is set to 10 to 30 N, and the tension of the rubber strip during fiber winding is set to 10 to 15 N; the winding head can perform flat winding, S-shaped winding and double-sided winding, and can be selected according to requirements. Refer to the appendix Figure 2 or the appendix Figure 6As shown in the figure, in the bead 330 of the high-speed and high-load radial tire of this embodiment, the bead 330 includes a bead core 331, a chafer 332 disposed above the bead core 331, and a carcass ply 321 covering the outside of the chafer 332; a steel wire reinforcing layer 333 covers the outer sidewall of the carcass ply 321, and two layers of nylon protectors are arranged in a cross-misaligned manner at a 45° angle on the outside of the steel wire reinforcing layer 333. The nylon protectors include a first nylon protector 334 attached to the outside of the steel wire reinforcing layer 333 and a second nylon protector 335 attached to the outside of the first nylon protector 334. Among them, the difference level between the first nylon protector 334 and the second nylon protector 335 is 10-20 mm, the difference level between the first nylon protector 334 and the end point of the carcass ply 321 is 20-30 mm, the difference level between the first nylon protector 334 and the two end points of the steel wire reinforcing layer 333 is 15-25 mm, and the thicknesses of both the first nylon protector 334 and the second nylon protector 335 are 0.8-1.2 mm.

[0048] In order to introduce the high-speed and high-load radial tire provided by the embodiments of the present invention more clearly and in detail, the following will be described in combination with specific embodiments.

[0049] Embodiment 1

[0050] Tire specification: 305 / 70R22.5

[0051] The crown structure of the high-speed and high-load radial tire of this embodiment adopts a structure of two belt layers plus steel wire winding, and is prepared by the following method:

[0052] In the bare auxiliary drum, the first belt layer and the first belt layer are respectively laid.

[0053] According to the requirements of tire speed and load, 4 steel wires of model 3×7×0.20HE are arranged side by side, the wire arrangement density is 42 wires / 10 cm, and two kinds of rubber strips with a width of 12.5 mm are extruded with rubber during wire laying. After preparing the steel wire winding crown strip for winding by a special online extrusion, the winding of two layers of steel wire winding layers above the second belt layer is completed through an online winding device. A buffer belt layer is attached above the outer steel wire winding layer, and the winding section adopts Figure 3 a certain way. Among them, during the winding process, the rubber strip has a tension of 10-30 N, the difference level between the two layers of steel wire winding layers is 12 mm, the difference level between the inner steel wire winding layer and the adjacent first belt layer 312 is 12 mm, and the difference level between the outer steel wire winding layer and the adjacent buffer belt layer is 15 mm.

[0054] Compared with the bead structure of conventional load-carrying radial tires, the bead structure of the high-speed and high-load radial tire in this embodiment also has two layers of nylon protective fabrics adhered to the outside of the steel wire reinforcement layer, specifically as follows: The bead of the tire in this embodiment of the invention includes a bead wire. Above the bead wire, there is a triangular rubber. The outside of the triangular rubber is coated with a carcass ply. The outside wall of the carcass ply is coated with a steel wire reinforcement layer. The outside of the steel wire reinforcement layer is successively provided with a first nylon protective fabric and a second nylon protective fabric that are cross-lapped at a 45° angle. Among them, the difference level between the first nylon protective fabric and the end point of the carcass ply is 12 mm, the difference level between the first nylon protective fabric and the two end points of the steel wire reinforcement layer is 10 - 15 mm, and the thicknesses of both the first nylon protective fabric and the second nylon protective fabric are 1.2 mm.

[0055] Example 2

[0056] Tire size: 305 / 70R22.5

[0057] The crown structure of the high-speed and high-load radial tire in this embodiment adopts a two-layer belt layer and a fiber cap strip mesh winding structure 314, and is prepared by the following method:

[0058] In the bare auxiliary drum, the first belt layer 311 and the first belt layer 312 are respectively laid.

[0059] 9 fibers are arranged side by side, extruded with rubber online to form a fiber rubber strip with a width of 12.5 mm, programmed to be wound into an S shape in a single circle, and 8 layers of fiber cap strip mesh structures are added and wound above the second belt layer by using a special online extrusion and online winding device. During the winding process, the rubber strip has a tension of 10 - 15 N, and the difference level between adjacent layers of the 8-layer winding structure is 10 mm.

[0060] Compared with the bead structure of conventional load-carrying radial tires, the bead structure of the high-speed and high-load radial tire in this embodiment also has two layers of nylon protective fabrics adhered to the outside of the steel wire reinforcement layer, specifically as follows: The bead of the tire in this embodiment of the invention includes a bead wire. Above the bead wire, there is a triangular rubber. The outside of the triangular rubber is coated with a carcass ply. The outside wall of the carcass ply is coated with a steel wire reinforcement layer. The outside of the steel wire reinforcement layer is successively provided with a first nylon protective fabric and a second nylon protective fabric that are cross-lapped at a 45° angle. Among them, the difference level between the first nylon protective fabric and the end point of the carcass ply is 15 mm, the difference level between the first nylon protective fabric and the two end points of the steel wire reinforcement layer is 15 mm, and the thicknesses of both the first nylon protective fabric and the second nylon protective fabric are 1.15 mm.

[0061] Comparative Example 1

[0062] Tire size: 305 / 70R22.5

[0063] The crown structure of the tire in this comparative example was prepared by the following method: During the tire molding process, in the bare auxiliary drum, the first belt layer and the second belt layer were respectively laid; A belt layer was laid flat and adhered above the second belt layer, and the difference level between adjacent belt layers was 14 mm;

[0064] The bead structure of the tire in this comparative example is the same as the design of the bead structure of a conventional heavy-duty radial tire, specifically as follows: The bead of the comparative example of the present invention includes a bead wire, a chafer is arranged above the bead wire, the outside of the chafer is coated with a carcass ply, and the outer sidewall of the carcass ply is coated with a steel wire reinforcement layer.

[0065] Comparative Example 2

[0066] Tire size: 305 / 70R22.5

[0067] The crown structure of the tire in this comparative example was prepared by the following method: During the tire molding process, in the bare auxiliary drum, the first belt layer and the second belt layer were respectively laid; Two belt layers were laid flat and adhered above the second belt layer, and the difference level between adjacent belt layers was 14 mm;

[0068] The bead structure of the tire in this comparative example is the same as the design of the bead structure of a conventional heavy-duty radial tire, specifically as follows: The bead of the comparative example of the present invention includes a bead wire, a chafer is arranged above the bead wire, the outside of the chafer is coated with a carcass ply, and the outer sidewall of the carcass ply is coated with a steel wire reinforcement layer.

[0069] Performance test:

[0070] The tires obtained in Examples 1-2 and Comparative Examples 1-2 were subjected to a durability performance test, and the test results are shown in Table 2. Among them, the test conditions are as follows: The ambient temperature is 38 ± 3 °C, the test drum speed is 45 km / h, the test air pressure is 900 kPa, the test load is 6800 kg (197.1%), and GB / T 4501 is referred to in the first 47 h, and 100% load is maintained until it fails after 47 h.

[0071] Table 2 Durability performance test results of the tires obtained in Examples 1-2 and Comparative Examples 1-2

[0072]

[0073] As can be seen from the above, Examples 1 and 2 adopt the high-speed and high-load radial tires of the present invention. The endurance time of Example 1 is 118 hours and 12 minutes, and the endurance time of Example 2 is 119 hours and 36 minutes. The endurance times of Examples 1 and 2 are significantly greater than the endurance time of Comparative Example 1, which is 42 hours and 36 minutes, and the endurance time of Comparative Example 2, which is 45 hours and 24 minutes. This shows that the endurance performance of the tires of the present invention has been significantly improved and has obvious advantages. Moreover, the damage form of the tires in Examples 1 and 2 of the present invention is bead bulging, and the damage form of the tires in Comparative Examples 1 and 2 is bead bulging, and the damage form of the tires is crown crack, which also shows that the crown structure design of the high-speed and high-load radial tires of the present invention significantly improves the crown endurance performance.

[0074] In summary, when designing the crown structure of the high-speed and high-load radial tires of the present invention, different on-line winding methods are adopted according to different tire speeds and loads, which solves the problem of the component rubber layer caused by the pollution of the traditional bonding parts, solves the problem of the carcass wire drawing and bursting under high load, makes the tires have high wear resistance and high mileage, extends the service life of the tires, and solves the difficult problem of the vehicle operation unit frequently replacing the tires.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A high-speed and high-load radial tire, characterized in that: The tire crown comprises a steel wire winding structure or a fiber crown strip mesh winding structure, wherein the steel wire winding structure is prepared by the following method: a plurality of steel wires are arranged side by side, and the steel wire strips are extruded by online glue application and then wound online, or the steel wire strips are extruded by offline glue application and then wound offline to obtain the steel wire winding structure.

2. The high-speed and high-load radial tire according to claim 1, characterized in that: The tensile strength of the rubber material in the steel wire rubber strip is 25-35 MPa, the elongation at break is 300%-400%, and the hardness is 48-65 Shore hardness.

3. The high-speed and high-load radial tire according to claim 1, characterized in that: The single wire diameter of the steel wire in the wire winding structure is ≤1.37mm, the minimum breaking force is ≥1200N, and the wire arrangement density is 40 to 50 wires / 10cm.

4. The high-speed and high-load radial tire according to claim 1, characterized in that: The steel wire winding structure comprises one or two steel wire winding layers, and two ends of the steel wire winding layer are two layers of overlapping steel wire winding structures.

5. The high-speed and high-load radial tire according to claim 4, characterized in that: A steel belt layer is arranged between the steel wire winding layer and the carcass, and the difference between the steel wire winding layer and the adjacent steel belt layer is 10-15mm; a buffer belt layer is attached on the top of the steel wire winding layer, and the difference between the steel wire winding layer and the adjacent buffer belt layer is 10-15mm.

6. The high-speed and high-load radial tire according to claim 1, characterized in that: The fiber crown band mesh winding structure is prepared by the following method: after arranging multiple fibers side by side, the fiber strips are extruded by online glue application, and according to programmed control, the fiber strips are wound in a single-turn manner, and a mesh structure is woven through multiple layers of winding.

7. The high-speed and high-load radial tire according to claim 6, characterized in that: The tensile strength of the rubber material in the fiber rubber strip is 22-32 MPa, the elongation at break is 310%-420%, and the hardness is 45-62 Shore hardness.

8. The high-speed and high-load radial tire according to claim 6, characterized in that: The width of the fiber crown strip mesh winding structure decreases from the bottom layer to the outermost layer.

9. The high-speed and high-load radial tire according to claim 1, characterized in that: Also includes a tire bead, the tire bead includes Traveller; Apex rubber is arranged above the wire ring, and the outer side of the apex rubber is covered with the carcass cord layer; Steel wire reinforcement layer, covering the outer wall of the carcass ply; Two layers of nylon protective cloth are cross-staggered and attached to the outside of the steel wire reinforcement layer at an angle of 30° to 45°.

10. The high-speed and high-load radial tire according to claim 9, characterized in that: The edge difference between the two layers of nylon protective cloth is 10-20 mm, and the width of each layer of nylon protective cloth is 100-120 mm.

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