Tires with a multi-layer continuous weave carcass ply structure

Abstract

To provide a tire having a multi-layer continuous woven carcass ply structure. [Solution] The solution includes a wire bead structure, a bead filler layer, and a multilayer continuous woven carcass ply structure, where both the wire bead structure and the bead filler layer are installed inside the multilayer continuous woven carcass ply structure, and the multilayer continuous woven carcass ply structure includes n layers of continuous woven carcass ply units, where the first layer of continuous woven carcass ply unit is located in the center, and the second layer of continuous woven carcass ply unit is wrapped around and bonded to the first layer of continuous woven carcass ply unit with adhesive rubber, and so on, by analogy, each layer of continuous woven carcass ply unit is bonded in order. The multilayer continuous woven carcass ply structure effectively improves the rigidity and impact resistance of the tire, significantly improving the load-bearing capacity, impact resistance, high-speed performance, and service life of the tire, while also effectively solving the problem of break points in conventional tire carcass plies and continuously transmitting the load to the tire cord.

Description

Technical Field

[0001] The present invention relates to the field of tire technology, and particularly to a tire having a multi-layer continuous woven carcass ply structure.

Background Art

[0002] In a conventional radial tire structure, it has only one layer of carcass ply and has good lateral flexibility, but is weak in withstanding impacts and large loads, and is likely to be damaged or even destroyed under severe road conditions. Tires having a multi-layer carcass ply structure have higher rigidity and impact resistance so that they have a longer service life under severe road surface conditions. For example, they are aircraft tires and construction machinery tires.

[0003] Conventional tire carcass plies are formed by rolling, cutting, and joining using tire cords and rubber. A series of cut points (shown in FIG. 1) occur at the cut locations of the carcass ply, and there are interfacial adhesion defects in the carcass cut point region. During the use of the tire, the tire cord cut point region has intense shear behavior with rubber, so holes and cracks occur in this region at the initial stage of use, greatly shortening the service life of the tire. Due to the discontinuity of the tire cords in this region, the load-bearing capacity of the tire is greatly limited.

[0004] Therefore, how to provide a tire having a multi-layer continuous woven carcass ply structure has become a technical problem that those skilled in the art need to solve urgently.

Summary of the Invention

[0005] To overcome defects caused by existing carcass ply manufacturing processes and to improve the high-speed performance, impact resistance, and load capacity of tires, the present invention proposes a tire having a multi-layer continuous woven carcass ply structure, which has a multi-layer continuous woven carcass ply that can suppress the standing wave phenomenon formed by the tire under heavy load and high-speed conditions, thereby improving the high-speed performance, impact resistance, and load capacity of the tire, while also significantly extending the service life of the tire.

[0006] To achieve the above objective, the present invention provides a tire having a multilayer continuous woven carcass ply structure, the tire comprising a wire bead structure, a bead filler layer, and a multilayer continuous woven carcass ply structure, wherein both the wire bead structure and the bead filler layer are installed inside the multilayer continuous woven carcass ply structure, and the bead filler layer covers the outside of the wire bead structure.

[0007] The multilayer continuous woven carcass ply structure includes n layers of continuous woven carcass ply units, the first layer of continuous woven carcass ply units being located at the center of the multilayer continuous woven carcass ply structure, the second layer of continuous woven carcass ply units being wrapped around and bonded to the first layer of continuous woven carcass ply units with adhesive rubber, and so on, by analogy, the continuous woven carcass ply units of each layer being bonded in order, of which the first layer of continuous woven carcass ply units is a single layer of continuous woven carcass ply, and the second to n layers of continuous woven carcass ply units are two layers of continuous woven carcass ply, inner and outer, ultimately forming a multilayer continuous woven carcass ply structure having 2n-1 layers of continuous woven carcass ply along the radial direction of the tire.

[0008] The multilayer continuous woven carcass ply structure further includes a shoulder rubber pad layer, a sidewall rubber layer, and a bead protector rubber layer. An airtight layer is provided on the inside of the multilayer continuous woven carcass ply structure, and a multilayer belt ply structure is provided on the outside of the multilayer continuous woven carcass ply structure. The shoulder rubber pad layer, sidewall rubber layer, and bead protector rubber layer are all bonded to the multilayer continuous woven carcass ply structure, and a tread lower layer, a tread upper layer, and a cap layer are attached externally to the multilayer belt ply structure.

[0009] Furthermore, the first layer continuous woven carcass ply unit is a first layer carcass ply tubular body formed by continuously and uniformly covering the tire cords in a zigzag pattern on the bead filler layer and wire bead structure after they have been rubber-coated.

[0010] Furthermore, the second to n layers of continuous woven carcass ply unit is a carcass ply cylinder formed by continuously and uniformly winding the tire cords, after they have been rubber-coated, in a zigzag pattern with a constant tensile force and angle onto the surface of the first layer of continuous woven carcass ply unit with adhesive rubber, and simultaneously rolling the tire cords of each layer using a pressure roller without leaving any gaps between the tire cords of each segment.

[0011] Furthermore, in the multilayer continuous woven carcass ply structure, the angle between the arrangement direction of a single tire cord in the single layer continuous woven carcass ply and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°.

[0012] Furthermore, in the multilayer continuous woven carcass ply structure, the internal angles of the arrangement of single tire cords in the inner and outer layers of continuous woven carcass ply are arranged parallel or symmetrically to the external angles, the boundary point between the inner and outer layers is located at the center of the bottom of the wire bead, and the angle between the arrangement direction of the single tire cords and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°.

[0013] Furthermore, in the multilayer continuous woven carcass ply structure, the tire cords are covered with rubber and arranged in a continuous zigzag pattern, and the connection method between the start and end points is to use a butt joint or overlapping joint method.

[0014] Furthermore, in the multilayer continuous woven carcass ply structure, the positions of the connection points formed by the continuous zigzag arrangement of the tire cords after they have been rubber-coated are determined by the finite element method or a tension calculation formula.

[0015] The stress distribution of a tire with a multi-layer continuous woven carcass ply structure under air-filled and loaded conditions is calculated using the finite element method, and the position where the tension of the tire cord is smallest is selected as the position of the tire cord connection point.

[0016] Furthermore, in the multilayer continuous woven carcass ply structure, the thickness of the rubber-coated tire cords arranged in a zigzag pattern is 0.5 to 2 times the diameter D of the tire cord.

[0017] Furthermore, the multilayer continuous woven carcass ply structure is formed by continuously and uniformly arranging the tire cord belt, which is composed of a single rubber-coated tire cord or multiple rubber-coated tire cords, in a zigzag pattern on the bead filler layer and wire bead structure to form a carcass ply cylinder.

[0018] Furthermore, in the tire cord belt composed of multiple rubber-coated tire cords, the tire cords are uniformly distributed, the number of tire cords is 2 to 8, and the width of the rubber-coated tire cord belt is 1 to 20 mm.

[0019] Furthermore, the tire cord used in the multilayer continuous woven carcass ply structure is made of steel wire, nylon, aramid, a braided mixture of nylon and aramid, polyester, or carbon fiber material.

[0020] Furthermore, adhesive is used between the continuous woven carcass ply units.

[0021] Or, it is connected by an adhesive rubber, and the thickness H of the adhesive rubber is larger than the diameter D of the tire cord.

[0022] Furthermore, the multi-layer continuous woven carcass ply structure is manufactured by arranging one tire cord or a tire cord belt.

[0023] Or, the continuous woven carcass ply units of each layer are individually and continuously arranged in a zigzag pattern, and the starting positions of the continuous woven carcass ply units of each layer are uniformly distributed at an angle of 360°.

[0024] Furthermore, the number of layers of the continuous woven carcass ply units in the multi-layer continuous woven carcass ply structure is 2 to 10 layers.

[0025] The beneficial effects of the present invention are as follows.

[0026] The present invention discloses a tire having a multi-layer continuous woven carcass ply structure. Among them, the multi-layer continuous woven carcass ply structure eliminates continuous cut points generated by manufacturing processes such as rolling, cutting, and joining in a conventional carcass ply layer, and there is no plating layer at the cut points, avoiding the occurrence of a situation where effective adhesion with rubber cannot be achieved. It prevents the occurrence of destruction forms such as holes and cracks at the cut points during tire running, and the tire cord slipping out when the tire receives an impact load, improving the load-bearing capacity and service life of the tire. It not only improves the rigidity and impact resistance of the tire, but also suppresses the standing wave phenomenon generated during the high-speed rotation of the tire, extending the service life of the tire during high-speed driving.

[0027] The tire having a multi-layer continuous woven carcass ply structure proposed by the present invention forms a carcass ply cylinder by continuously and uniformly arranging a tire cord belt composed of one rubber-coated tire cord or a plurality of rubber-coated tire cords in a continuous weave on a bead filler layer and a wire bead structure, establishing a stable and continuous force transmission structure, strengthening the force transmission between the carcass and the wire bead structure, improving the rigidity of the tire cord layer, reducing the weight of the tire, and further improving the manufacturing efficiency of the carcass ply.

[0028] To more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the drawings that need to be used in the following description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present invention, and those skilled in the art can also obtain other drawings based on the provided drawings without creative effort.

Brief Description of the Drawings

[0029] [Figure 1] It is a schematic cross-sectional structure diagram of a conventional tire. [Figure 2] It is a schematic structural diagram of a tire having a multi-layer continuous woven carcass ply structure of the present invention. [Figure 3] It is a schematic structural diagram of a single-layer continuous woven carcass ply in the present invention. [Figure 4] It is a schematic structural diagram of an inner and outer two-layer continuous woven carcass ply in the present invention. [Figure 5] It is a schematic diagram of the arrangement angle of the tire cords of a single-layer continuous woven carcass ply in the present invention. [Figure 6] It is a schematic diagram of the arrangement angle of the tire cords of an inner and outer two-layer continuous woven carcass ply in the present invention. [Figure 7] It is a schematic structural diagram of the tire cords of a single-layer continuous woven carcass ply in the present invention. [Figure 8] It is a schematic structural diagram of the tire cords of an inner and outer two-layer continuous woven carcass ply in the present invention. [Figure 9] This is a schematic diagram of an arrangement in which the bead filler in the present invention extends outward along the axial direction of the wire bead structure. [Figure 10] This is a schematic diagram of an arrangement in which the bead filler in the present invention extends outward along the radial direction of the wire bead structure. [Figure 11] This is a schematic diagram of a tire cord belt constructed by covering a single tire cord with rubber. [Figure 12] This is a schematic diagram of a tire cord belt, which is constructed by covering multiple tire cords with rubber. [Figure 13] This is a schematic diagram illustrating the changes in the outer contour of conventional tires. [Figure 14] This is a schematic diagram showing the change in the outer contour of a tire (winding angle 1°) having the multilayer continuous woven carcass ply structure of the present invention. [Figure 15] This is a schematic diagram showing the change in the outer contour of a tire (winding angle 2°) having the multilayer continuous woven carcass ply structure of the present invention. [Figure 16] This is a schematic diagram of the geometric parameters of each part of a tire having the multilayer continuous woven carcass ply structure of the present invention. [Modes for carrying out the invention]

[0030] The following describes the technical solutions in the embodiments of the present invention clearly and completely. The embodiments described are only a subset of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art without requiring creative effort based on the embodiments of the present invention are all within the scope of the protection of the present invention. It should be noted that terms such as “First,” “Second,” etc., in the specification and claims of this application, as well as in the drawings, are for distinguishing similar subjects and are not necessarily intended to describe a specific order or sequence. The data used in this manner are interchangeable where appropriate for the embodiments of this application described herein. Furthermore, the terms “includes” and “having” and any variations thereof are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device including a set of steps or components is not necessarily limited to the steps or components explicitly listed, and may include other steps or components not explicitly listed or specific to these processes, methods, products, or devices. In this application, directions or positional relationships indicated by terms such as "up," "down," "left," "right," "front," "back," "top," "bottom," "inside," "outside," "center," "vertical," "horizontal," "lateral," and "vertical" are based on the directions or positional relationships shown in the drawings. These terms are used primarily to better describe this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a particular orientation or being configured and operated in a particular orientation. Furthermore, some of the above terms may be used to indicate meanings other than direction or positional relationships; for example, the term "above" may also be used to indicate some dependency or connection relationship. A person skilled in the art will be able to understand the specific meaning of these terms in this application depending on the specific context. Furthermore, the terms “attachment,” “installation,” “provide,” “connection,” “connection,” and “insertion connection” should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integral structures; they may be mechanical or electrical connections; they may be direct connections or indirect connections via an intermediate medium; or they may be internal communication between two devices, elements, or components. A person skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0031] Example 1: Referring to Figure 2, the present invention discloses a tire having a multilayer continuous woven carcass ply structure, the tire comprising a wire bead structure 1, a bead filler layer 2, a multilayer continuous woven carcass ply structure 3, a shoulder rubber pad layer 5, a sidewall rubber layer 4, and a bead protector rubber layer 11, wherein an airtight layer 10 is provided inside the multilayer continuous woven carcass ply structure 3, and a multilayer belt ply structure 9 is provided outside the multilayer continuous woven carcass ply structure 3, the shoulder rubber pad layer 5, the sidewall rubber layer 4, and the bead protector rubber layer 11 are all bonded to the multilayer continuous woven carcass ply structure 3, the wire bead structure 1 and the bead filler layer 2 are both installed inside the multilayer continuous woven carcass ply structure 3, the bead filler layer 2 covers the outside of the wire bead structure 1, and a tread lower layer 6, a tread upper layer 7, and a cap layer 8 are attached externally to the multilayer belt ply structure 9.

[0032] In this embodiment, as shown in Figures 9 to 10, the bead filler layer 2 is arranged along the circumferential direction of the wire bead structure 1, and the bead filler layer 2 extends along the radial or axial direction of the wire bead structure 1.

[0033] The multilayer continuous woven carcass ply structure 3 includes n layers of continuous woven carcass ply units, the first layer of continuous woven carcass ply units being located in the center of the multilayer continuous woven carcass ply structure 3, the second layer of continuous woven carcass ply units being wrapped around and bonded to the first layer of continuous woven carcass ply units with adhesive rubber, and so on, by analogy, the continuous woven carcass ply units of each layer being bonded in order, of which the first layer of continuous woven carcass ply units is a single layer of continuous woven carcass ply, and the second to n layers of continuous woven carcass ply units are two layers of continuous woven carcass ply, inner and outer, ultimately forming a multilayer continuous woven carcass ply structure 3 having 2n-1 layers of continuous woven carcass ply along the radial direction of the tire.

[0034] The first layer continuous woven carcass ply unit is a first layer carcass ply tubular body formed by continuously and uniformly covering the tire cords in a zigzag pattern on the bead filler layer 2 and the wire bead structure 1 after they have been rubber-coated.

[0035] The second to n-layer continuous woven carcass ply units are formed by continuously and uniformly winding the rubber-coated tire cords around the adhesive rubber-coated surface of the first layer continuous woven carcass ply unit in a zigzag pattern with constant tensile force and angle after the tire cords have been rubber-coated, and simultaneously rolling the tire cords of each layer using a pressure roller without leaving any gaps between the tire cords of each segment.

[0036] As shown in Figures 5, 7(a), and 7(b), in the multilayer continuous woven carcass ply structure 3, the angle between the arrangement direction of a single tire cord in the single layer continuous woven carcass ply and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°.

[0037] As shown in Figures 6, 8(a), and 8(b), in the multilayer continuous woven carcass ply structure 3, the internal angles of the arrangement of single tire cords in the inner and outer layers of continuous woven carcass ply are arranged parallel or symmetrically to the external angles, the boundary point between the inner and outer layers is located at the center of the bottom of the wire bead, and the angle between the arrangement direction of the single tire cords and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°.

[0038] In the multi-layer continuous woven carcass ply structure 3, the tire cords are rubber-coated and arranged in a continuous zigzag pattern, and the connection method between their start and end points is either butt joint or overlap joint.

[0039] In the multilayer continuous woven carcass ply structure 3, the positions of the connection points formed by the continuous zigzag arrangement of tire cords after they have been rubber-coated are determined by the finite element method or a tension calculation formula.

[0040] The stress distribution of a tire having a multi-layer continuous woven carcass ply structure 3 under air-filled and loaded conditions is calculated using the finite element method, and the position where the tension of the tire cord is smallest is selected as the position of the tire cord connection point.

[0041] In the multi-layer continuous woven carcass ply structure 3, the thickness of the rubber-coated tire cords arranged in a zigzag pattern is 0.5 to 2 times the diameter D of the tire cord.

[0042] The multi-layer continuous woven carcass ply structure 3 is formed by continuously and uniformly arranging a tire cord belt, which consists of a single rubber-coated tire cord (shown in Figure 11) or multiple rubber-coated tire cords (shown in Figure 12), in a zigzag pattern on the bead filler layer 2 and the wire bead structure 1 to form a carcass ply cylinder.

[0043] In a tire cord belt composed of multiple rubber-coated tire cords, the tire cords are uniformly distributed, the number of tire cords is between 2 and 8, and the width of the rubber-coated tire cord belt is between 1 and 20 mm.

[0044] The tire cords used in the multi-layer continuous woven carcass ply structure 3 include steel wire, nylon, aramid, a braided mixture of nylon and aramid, polyester, or carbon fiber material.

[0045] The continuous woven carcass ply units are connected using adhesive or adhesive rubber, where the thickness H of the adhesive rubber is greater than the diameter D of the tire cord.

[0046] The multi-layer continuous woven carcass ply structure 3 is manufactured by arranging a single tire cord or tire cord belt, or the continuous woven carcass ply units of each layer are individually arranged in a zigzag pattern, and the starting positions of the continuous woven carcass ply units of each layer are uniformly distributed at a 360° angle.

[0047] In the multi-layer continuous woven carcass ply structure 3, the number of layers in the continuous woven carcass ply unit is 2 to 10.

[0048] Example 2: Finite element analysis was performed on conventional tires and tires with a multi-layer continuous woven carcass ply structure (wrap angle 1°).

[0049] As shown in Figure 13, this is a schematic diagram of the changes in the outer contour of a conventional tire. The black contour represents the tire's design outer contour, the red contour represents the tire's air-filled outer contour, and the blue contour represents the tire's loaded outer contour.

[0050] As shown in Figure 14, this is a schematic diagram of the change in the outer contour of a tire (wrap angle 1°) having a multi-layer continuous woven carcass ply structure. The black contour is the design outer contour of the tire, the red contour is the air-filled outer contour of the tire, and the blue contour is the loaded outer contour of the tire.

[0051] The steps for finite element analysis are as follows:

[0052] 1. We selected the tire model number that needed to be analyzed, obtained the relevant geometric and material parameters of that tire model number, including the maximum width, maximum outer diameter, radius of curvature, modulus of elasticity of the rubber material, and Poisson's ratio of the rubber material, and imported them into finite element calculation software.

[0053] 2. Based on the above parameters, a tire finite element analysis model was established, and preprocessing for finite element calculation analysis was completed, including unit establishment, material attribute assignment, and mesh division.

[0054] 3. The pre-processed finite element model was imported into a finite element software calculation module and calculations were performed to obtain the finite element analysis results for the tire.

[0055] Finite element analysis was performed on conventional rubber tires and tires with a multi-layer continuous woven carcass ply structure (wrapping angle 1°), and the same boundary conditions were applied to them, namely, an air pressure of 1.59 MPa and a load of 1.8570 × 10⁻⁶. 5 By adding N and calculating and comparing the cross-sectional width and settlement of the contact patch of these two types of tires under the same boundary conditions, as shown in Table 1, it can be seen that the tire with a multi-layer continuous woven carcass ply structure showed a 4.92% reduction in settlement and a 1.0% reduction in maximum width after load compared to the conventional tire.

[0056] [Table 1]

[0057] Example 3: The effect of different winding angles on the stiffness of tires with a multi-layer continuous woven carcass ply structure was analyzed. Finite element analysis was performed on tires with a multi-layer continuous woven carcass ply structure (winding angle 1°) and tires with a multi-layer continuous woven carcass ply structure (winding angle 2°).

[0058] As shown in Figure 14, this is a schematic diagram of the change in the outer contour of a tire (wrap angle 1°) having a multi-layer continuous woven carcass ply structure. The black contour is the design outer contour of the tire, the red contour is the air-filled outer contour of the tire, and the blue contour is the loaded outer contour of the tire.

[0059] As shown in Figure 15, this is a schematic diagram of the change in the outer contour of a tire (wrap angle 2°) having a multi-layer continuous woven carcass ply structure. The black contour is the design outer contour of the tire, the red contour is the air-filled outer contour of the tire, and the blue contour is the loaded outer contour of the tire.

[0060] Analyzing the results for tires with two different carcass structures, as shown in Table 2, the tire with a multi-layer continuous woven carcass ply structure (wrapping angle 1°) showed a 2.43% reduction in sinking and a 0.53% reduction in maximum width after loading compared to the tire with a multi-layer continuous woven carcass ply structure (wrapping angle 2°).

[0061] [Table 2]

[0062] Example 4: The tire has a multi-layer continuous woven carcass ply structure, and its specific manufacturing steps are as follows:

[0063] S1, Arrangement of the first layer of carcass ply tubular bodies: Two wire bead structures were prepared and fixed in parallel at a certain interval, a bead filler layer was applied to the wire bead structures along the circumferential direction, one tire cord with a rubber-coated surface was selected, a certain length was left in advance and it was fixed to one of the bead filler layers, and then it was wrapped around the other bead filler layer with a certain tensile force and angle, and in this way the cords were continuously woven together 360 degrees along the circumferential direction, and at the same time the rubber-coated tire cords were rolled into a single layer using a pressure roller, and finally the rubber-coated tire cords were connected at the calculated connection points to produce the first layer of carcass ply tubular bodies.

[0064] S2, Arrangement of the second to n layers of carcass ply cylinders: The upper and lower surfaces of the first layer of carcass ply cylinders are covered with a rubber layer, a rubber-covered tire cord is selected, a certain length is left in advance, and one end is fixed to the first layer of carcass ply cylinders. This cord is then wrapped around the first layer of carcass ply cylinders with a certain tensile force and angle, and simultaneously rolled using a pressure roller. Finally, the rubber-covered tire cord is connected at the calculated connection point. In this way, a second layer of carcass ply cylinders is produced, which is divided into upper and lower layers along the radial direction of the tire. Similarly, a third layer of carcass ply cylinders can be arranged.

[0065] S3. Material preparation: Other structural layers necessary for tire production and manufacturing are prepared, and the airtight layer, shoulder rubber pad layer, sidewall rubber layer, steel rim cloth layer, and bead protector rubber layer are cut to the corresponding lengths. These are then attached to the carcass ply tube based on the structural dimensions of the tire to obtain semi-finished components of a rubber tire having a multi-layer continuous woven carcass ply structure.

[0066] S4. Molding: The semi-finished tire component prepared in S3 was filled with air at a constant pressure to form the tire component, and the belt layer and tread rubber layer were attached by a pressure bonding method to obtain an unvulcanized green tire of rubber tire having a multi-layer continuous woven carcass ply structure.

[0067] S5, Vulcanization: The green tire prepared in S4 was heated, pressurized, and vulcanized in a vulcanizing machine. After vulcanization was completed, a tire having a multi-layer continuous woven carcass ply structure was obtained.

[0068] Rubber tires are manufactured in four steps: arrangement, material preparation, molding, and vulcanization. The manufacturing process for these tires is simple and convenient, improving the production efficiency of rubber tires and ensuring the reliability of their quality.

[0069] A wire bead structure and a bead filler layer are placed inside the first layer of continuously woven carcass ply units, and after covering the tire cord with rubber, the bead filler layer and wire bead are continuously and uniformly arranged in a continuous weave to form the first layer of carcass ply tubular body, of which two wire bead structures are fixed parallel to each other at a certain interval.

[0070] In a multi-layer continuous woven carcass ply structure, the arrangement direction of a single tire cord and the axial direction of the tire form an angle of 0.1° to 3° or -0.1° to -3°.

[0071] The width of the tire cord belt formed after covering a single tire cord with rubber is b, the thickness is h, and the radius of the wire bead structure covered with a bead filler layer is R. rim The cross-section of the wire bead structure is approximated as a circular cross-section, and its diameter is represented as d. The number of turns of the tire cord belt in the first layer of continuous woven carcass ply is N1, which can be calculated based on equation (1). The number of turns of the tire cord belt in the second to n layers of continuous woven carcass ply is N n Therefore, it can be calculated based on equation (2).

[0072] As shown in Figure 3, the first layer of continuously woven carcass ply unit, constructed by continuously weaving together, has a spacing of b between the tire cord belts at each end, and consists of two rows of tire cord belts arranged around each turn, with a total of 2N1 rows of tire cord belts continuously woven together throughout the entire single layer of carcass ply, and equation (1) is given by:

[0073]

number

[0074] As shown in Figure 4, the 2nd to nth layers of the continuously woven carcass ply unit are constructed by weaving them together in a continuous manner. The adhesive thickness between each layer of the carcass ply is H, and for each full rotation, one row of tire cord belts is arranged on the upper and lower layers of the carcass ply cylinder, with a spacing of between every two rows of tire cord belts, and a total of N for the entire carcass ply. n The tire cord belts are woven together in a continuous pattern, and equation (2) is given.

[0075]

number

[0076] As the tire blank is formed, the single-layer carcass ply cylinder deforms, as shown in Figure 13, and the radius of each part changes, of which is the bead radius of the rim. TIFF0007859720000006.tif45166

[0077]

number

[0078]

number

[0079]

number

[0080] TIFF0007859720000010.tif20166

[0081]

number

[0082]

number

[0083]

number

[0084] The foregoing are merely preferred embodiments of the present application and do not limit it, and various modifications and changes are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application are all covered by the scope of the present application. [Explanation of Symbols]

[0085] 1. Wire bead structure, 2. Bead filler layer, 3. Multi-layer continuous woven carcass ply structure, 4. Sidewall rubber layer, 5. Shoulder rubber pad layer, 6. Tread lower layer, 7. Tread upper layer, 8. Cap layer, 9. Multi-layer belt ply structure, 10. Airtight layer, 11. Bead protector rubber layer

Claims

1. A tire having a multi-layer continuous woven carcass ply structure, The structure includes a wire bead structure (1), a bead filler layer (2), and a multilayer continuous woven carcass ply structure (3), wherein both the wire bead structure (1) and the bead filler layer (2) are installed inside the multilayer continuous woven carcass ply structure (3), and the bead filler layer (2) covers the outside of the wire bead structure (1). The multilayer continuous woven carcass ply structure (3) includes n layers (where n is an integer of 2 or more) of continuous woven carcass ply units, the first layer continuous woven carcass ply unit is a single layer continuous woven carcass ply, located at the center of the multilayer continuous woven carcass ply structure (3), the nth layer (where n is an integer of 2 or more) continuous woven carcass ply unit is a double layer continuous woven carcass ply, and is wrapped around and bonded to the (n-1)th layer (where n is an integer of 2 or more) continuous woven carcass ply unit, thereby forming a multilayer continuous woven carcass ply structure (3) having 2n-1 layers of continuous woven carcass ply along the radial direction of the tire. In the multilayer continuous woven carcass ply structure (3), the position of the connection point formed by folding the tire cord back at the axial end of the tire after it has been covered with rubber is determined by the finite element method or a tension calculation formula. The stress distribution of a tire having a multi-layer continuous woven carcass ply structure (3) under air-filled and loaded conditions is calculated using the finite element method, and the position where the tension of the tire cord is smallest is selected as the position of the tire cord connection point. A tire having a multi-layer continuous woven carcass ply structure characterized by the above.

2. The multilayer continuous woven carcass ply structure (3) further includes a shoulder rubber pad layer (5), a sidewall rubber layer (4), and a bead protector rubber layer (11). An airtight layer (10) is provided on the inside of the multilayer continuous woven carcass ply structure (3), and a multilayer belt ply structure (9) is provided on the outside of the multilayer continuous woven carcass ply structure (3). The shoulder rubber pad layer (5), the sidewall rubber layer (4), and the bead protector rubber layer (11) are all bonded to the multilayer continuous woven carcass ply structure (3), and a tread lower layer (6), a tread upper layer (7), and a cap layer (8) are attached externally to the multilayer belt ply structure (9). A tire having the multilayer continuous woven carcass ply structure described in claim 1.

3. The first layer continuous woven carcass ply unit is a first layer carcass ply tubular body formed by folding and arranging the tire cords at the axial ends of the tire on the bead filler layer (2) and wire bead structure (1) after the tire cords have been rubber-coated. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

4. The aforementioned n-layer (n is an integer of 2 or more) continuous woven carcass ply unit is a carcass ply cylinder formed by uniformly wrapping the tire cords around the surface of the first layer of continuous woven carcass ply unit with adhesive rubber after the tire cords have been rubber-coated, with a constant tensile force and angle, and by folding them back at the axial end of the tire, leaving no gaps between the tire cords of each segment, while simultaneously rolling the tire cords of each layer using a pressure roller. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

5. In the multilayer continuous woven carcass ply structure (3), the angle between the arrangement direction of the single tire cords of the single layer continuous woven carcass ply and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

6. In the multilayer continuous woven carcass ply structure (3), the internal angles of the arrangement of single tire cords in the inner and outer layers of continuous woven carcass ply are arranged parallel to or symmetrically with the external angles, the boundary point between the inner and outer layers is located at the center of the bottom of the wire bead, and the angle between the arrangement direction of the single tire cords and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

7. In the aforementioned multilayer continuous woven carcass ply structure (3), the tire cords are covered with rubber and folded back at the axial ends of the tire and then arranged. The connection method between the start and end points is to use a butt joint or overlapping joint method. A tire having the multilayer continuous woven carcass ply structure according to claim 3 or 4.

8. In the multilayer continuous woven carcass ply structure (3) described above, the thickness of the rubber-coated tire cords that are folded and arranged at the axial ends of the tire is 0.5 to 2 times the diameter D of the tire cord. A tire having the multilayer continuous woven carcass ply structure according to claim 3 or 4.

9. The multilayer continuous woven carcass ply structure (3) is formed by folding and arranging a tire cord belt, which is composed of a single rubber-coated tire cord or multiple rubber-coated tire cords, on the bead filler layer (2) and the wire bead structure (1) at the axial end of the tire to form a carcass ply cylinder. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

10. In the tire cord belt composed of multiple rubber-coated tire cords, the tire cords are uniformly distributed, the number of tire cords is 2 to 8, and the width of the rubber-coated tire cord belt is 1 to 20 mm. A tire having the multilayer continuous woven carcass ply structure described in claim 9.

11. The tire cord used in the aforementioned multilayer continuous woven carcass ply structure (3) is made of steel wire, nylon, aramid, a mixed braid of nylon and aramid, polyester, or carbon fiber material. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

12. Adhesion is used between the continuous woven carcass ply units. Alternatively, they may be connected by adhesive rubber, the thickness H of which is greater than the diameter D of the tire cord. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

13. The aforementioned multilayer continuous woven carcass ply structure (3) is manufactured by arranging a single tire cord or tire cord belt, Alternatively, the continuous woven carcass ply units of each layer are individually folded and arranged at the axial ends of the tire, and the starting positions of the continuous woven carcass ply units of each layer are uniformly distributed at a 360° angle. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

14. In the multilayer continuous woven carcass ply structure (3) described above, the number of layers of the continuous woven carcass ply unit is 2 to 10 layers. A tire having the multilayer continuous woven carcass ply structure described in claim 1.

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