A tire having a plurality of continuous braided carcass ply layers

Abstract

The application discloses a tire with a multilayer continuous weaving carcass ply structure and relates to the technical field of tires.The tire comprises a steel ring structure, a triangular rubber layer and the multilayer continuous weaving carcass ply structure, wherein the steel ring structure and the triangular rubber layer are arranged inside the multilayer continuous weaving carcass ply structure; the multilayer continuous weaving carcass ply structure comprises n layers of continuous weaving carcass ply units, the first layer of continuous weaving carcass ply unit is located at the center, the second layer of continuous weaving carcass ply unit is wound and attached on the first layer of continuous weaving carcass ply unit with an adhesive layer, and each layer of continuous weaving carcass ply unit is sequentially attached in the same way.The multilayer continuous weaving carcass ply structure can effectively improve the stiffness and impact resistance of the tire, greatly improve the load-carrying capacity, impact resistance, high-speed performance and service life of the tire, effectively solve the breakpoint problem of the traditional tire carcass ply and make the cord continuously transmit the load.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, in particular to a tire with a multi-layer continuously woven carcass cord layer structure. Background Art

[0002] Traditional radial tires have a single carcass ply structure, providing good lateral flexibility but limited resistance to impact and high loads, making them susceptible to damage or even failure in harsh road conditions. Tires with multiple carcass ply structures offer increased stiffness and impact resistance, extending their service life in harsh road conditions. These tires are used in applications such as aviation and off-highway tires.

[0003] The carcass ply of a traditional tire is made of cord and rubber through calendering, cutting and splicing. A series of cutting points will be generated at the cutting point of the ply (such as Figure 1 This results in interfacial bonding defects in the carcass breakpoint area. During tire use, the cord breakpoint area experiences intense shearing with the rubber, leading to holes and cracks in this area early in life, significantly reducing the tire's service life. The cord discontinuity in this area severely limits the tire's load-bearing capacity.

[0004] Therefore, how to provide a tire with a multi-layer continuously woven carcass cord layer structure has become a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] In order to overcome the defects brought about by the existing carcass cord layer manufacturing process and improve the high-speed performance, impact resistance and load capacity of the tire, the present invention proposes a tire with a multi-layer continuously woven carcass cord layer structure. The tire has multiple layers of continuously woven carcass cord layers, which can suppress the standing wave phenomenon formed by the tire under high-load and high-speed conditions, thereby improving the high-speed performance, impact resistance and load capacity of the tire and significantly increasing the service life of the tire.

[0006] To achieve the above objectives, the present invention provides a tire having a multi-layer continuously woven carcass ply structure, comprising a bead ring structure, an apex rubber layer, and a multi-layer continuously woven carcass ply structure, wherein the bead ring structure and the apex rubber layer are both disposed within the multi-layer continuously woven carcass ply structure, and the apex rubber layer is coated on the outside of the bead ring structure;

[0007] The multi-layer continuous woven carcass ply structure includes n layers of continuously woven carcass ply units, the first layer of continuously woven carcass ply unit is located at the center of the multi-layer continuous woven carcass ply structure, the second layer of continuously woven carcass ply unit is wound and bonded to the first layer of continuously woven carcass ply unit with an adhesive layer attached thereto, and so on, each layer of continuously woven carcass ply units is bonded in sequence, wherein the first layer of continuously woven carcass ply unit is a single-layer continuously woven carcass ply, and the second to n-layer continuously woven carcass ply units are inner and outer double-layer continuously woven carcass ply, ultimately forming a multi-layer continuously woven carcass ply structure with 2n-1 layers of continuously woven carcass ply in the radial direction of the tire.

[0008] It also includes a shoulder rubber pad layer, a sidewall rubber layer and a bead rubber protection layer. The inner side of the multi-layer continuous woven carcass cord layer structure is provided with an airtight layer, and the outer side of the multi-layer continuous woven carcass cord layer structure is provided with a multi-layer belt cord layer structure; the shoulder rubber pad layer, the sidewall rubber layer and the bead rubber protection layer are all bonded to the multi-layer continuous woven carcass cord layer structure, and the multi-layer belt cord layer structure is attached with a tread lower layer, a tread upper layer and a cap layer.

[0009] Furthermore, the first layer of continuously woven carcass cord layer unit is a first layer of carcass cord tube formed by continuously and evenly covering and zigzagging the cords on the apex rubber layer and the wire ring structure after being coated with rubber.

[0010] Furthermore, the 2nd to nth layer of continuously woven carcass cord layer units are formed by continuously and evenly winding in a zigzag shape with a certain tension and angle on the outer surface of the first layer of continuously woven carcass cord layer with an adhesive layer after the cords are coated with rubber, and no spacing is retained between each section of the cords. At the same time, an extrusion roller is used to calender each layer of cords to form the 2nd to nth layer of carcass cord tubes.

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

[0012] Furthermore, the inner and outer double-layer continuous woven carcass cord layers in the multi-layer continuously woven carcass cord layer structure have inner and outer cord arrangement angles that are parallel or symmetrical to the outer angles, the dividing point between the inner and outer sides is located at the bottom center of the wire ring, and the angle between the single cord arrangement direction and the tire axial direction is 0.1° to 3° or -0.1° to -3°.

[0013] Furthermore, after the rubber-coated cords in the multi-layer continuously woven carcass ply structure are arranged in a continuous zigzag pattern, the starting point and the end point are connected by butt-jointing or overlapping.

[0014] Furthermore, the positions of the connection points generated by the continuous zigzag arrangement of the rubber-coated cords in the multi-layer continuously woven carcass ply structure are determined by a 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 inflation and load conditions is calculated using the finite element method, and the position where the cord tension is minimum is selected as the location of the cord connection point.

[0016] Furthermore, the thickness of the zigzag-shaped rubber-coated cords in the multi-layer continuously woven carcass ply structure is 0.5-2 times the cord diameter D.

[0017] Furthermore, the multi-layer continuously woven carcass cord layer structure adopts a single rubber-coated cord or a cord tape composed of multiple rubber-coated cords, which is continuously and evenly arranged in a zigzag shape on the apex rubber layer and the wire ring structure to form a carcass cord tube.

[0018] Furthermore, the cords in the cord tape composed of the plurality of rubber-coated cords are evenly distributed, and the number of the cords is 2 to 8; the width of the rubber-coated cord tape is 1 to 20 mm.

[0019] Furthermore, the cords used in the multi-layer continuously woven carcass ply structure are steel wire, nylon, aramid, a blend of nylon and aramid, polyester or carbon fiber material.

[0020] Furthermore, the continuously woven carcass ply units are bonded together;

[0021] Alternatively, the cords are connected by an adhesive layer, wherein the thickness H of the adhesive layer is greater than the diameter D of the cords.

[0022] Furthermore, the multi-layer continuously woven carcass ply structure is made by arranging a single cord or cord tape;

[0023] Alternatively, each layer of the continuously woven carcass ply is arranged in a zigzag pattern, and the starting points of the continuously woven carcass ply units of each layer are evenly distributed within a 360° angle.

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

[0025] The beneficial effects of the present invention are:

[0026] The present invention discloses a tire having a multi-layer continuous woven carcass cord ply structure. This structure eliminates the continuous cut points produced by conventional carcass cord ply manufacturing processes such as calendering, cutting, and splicing. This eliminates the inability to effectively bond with the rubber due to the lack of a coating at the cut points. This prevents damage such as holes and cracks at the cut points during tire operation, and cord pullout when the tire is subjected to impact loads. This improves the tire's load-bearing capacity and service life. This not only enhances the tire's stiffness and impact resistance, but also suppresses standing waves generated during high-speed rotation, thereby increasing the tire's service life during high-speed operation.

[0027] The present invention proposes a tire with a multi-layer continuously woven carcass cord layer structure, which can be composed of a single cord coated with rubber, or a cord belt composed of multiple cords coated with rubber, which is continuously woven and continuously and evenly arranged on the apex rubber layer and the steel bead structure to form a carcass cord tube, thereby establishing a stable and continuous force transmission structure, strengthening the force transmission between the carcass and the steel bead structure, improving the stiffness of the cord layer, reducing the weight of the tire, and improving the manufacturing efficiency of the carcass cord layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 Schematic diagram of the cross-sectional structure of a traditional tire.

[0030] Figure 2 The figure is a schematic structural diagram of a tire with a multi-layer continuously woven carcass cord structure according to the present invention.

[0031] Figure 3 It is a schematic structural diagram of a single-layer continuously woven carcass cord layer in the present invention.

[0032] Figure 4 It is a schematic structural diagram of the inner and outer double-layer continuously woven carcass cord layers in the present invention.

[0033] Figure 5 Schematic diagram of the cord arrangement angle of the single-layer continuously woven carcass ply in the present invention.

[0034] Figure 6 Schematic diagram of the cord arrangement angles of the inner and outer double-layer continuously woven carcass plies in the present invention.

[0035] Figure 7Schematic diagram of the structure of the cords of a single-layer continuously woven carcass ply in the present invention.

[0036] Figure 8 It is a schematic diagram of the structure of the cords of the inner and outer double-layer continuously woven carcass ply in the present invention.

[0037] Figure 9 This is a schematic diagram of the arrangement of the apex rubber extending outward along the axial direction of the wire ring structure in the present invention.

[0038] Figure 10 This is a schematic diagram of the arrangement of the apex rubber extending radially outward along the wire ring structure in the present invention.

[0039] Figure 11 Schematic diagram of the cord tape composed of a single cord coated with rubber.

[0040] Figure 12 Schematic diagram of a cord tape composed of multiple cords coated with rubber.

[0041] Figure 13 Schematic diagram of the outer contour changes of traditional tires.

[0042] Figure 14 Schematic diagram of the outer profile change of a tire with a multi-layer continuously woven carcass cord structure (1° winding angle) according to the present invention.

[0043] Figure 15 Schematic diagram of the outer contour change of a tire with a multi-layer continuously woven carcass cord structure (2° winding angle) according to the present invention.

[0044] Figure 16 The figure is a schematic diagram of geometric parameters of various parts of a tire having a multi-layer continuously woven carcass cord structure according to the present invention.

[0045] Among them, in the figure:

[0046] 1-Wire bead structure; 2-Triangle rubber layer; 3-Multi-layer continuous woven carcass cord structure; 4-Sidewall rubber layer; 5-Shoulder rubber layer; 6-Undertread layer; 7-Uppertread layer; 8-Cap layer; 9-Multi-layer belt cord structure; 10-Inner liner; 11-Seed rubber layer. DETAILED DESCRIPTION

[0047] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or components is not necessarily limited to those steps or components clearly listed, but may include other steps or components that are not clearly listed or inherent to these processes, methods, products, or apparatus.

[0049] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0050] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0052] Example 1:

[0053] See attached Figure 2The present invention discloses a tire with a multi-layer continuous woven carcass cord layer structure, comprising a wire bead structure 1, an apex rubber layer 2, a multi-layer continuous woven carcass cord layer structure 3, a shoulder cushion layer 5, a sidewall rubber layer 4 and a bead protection rubber layer 11. An airtight layer 10 is provided on the inner side of the multi-layer continuous woven carcass cord layer structure 3, and a multi-layer belt cord layer structure 9 is provided on the outer side of the multi-layer continuous woven carcass cord layer structure 3; the shoulder cushion layer 5, the sidewall rubber layer 4 and the bead protection rubber layer 11 are all bonded to the multi-layer continuous woven carcass cord layer structure 3, the wire bead structure 1 and the apex rubber layer 2 are both arranged inside the multi-layer continuous woven carcass cord layer structure 3, the apex rubber layer 2 is coated on the outer side of the wire bead structure 1, and the multi-layer belt cord layer structure 9 is attached with a tread lower layer 6, a tread upper layer 7 and a cap layer 8.

[0054] In this embodiment, the apex rubber layer 2 is arranged along the circumference of the wire ring structure 1, and the apex rubber layer 2 extends along the radial direction or axial direction of the wire ring structure 1. Figure 9-10 shown.

[0055] The multi-layer continuous woven carcass ply structure 3 includes n layers of continuously woven carcass ply units, the first layer of continuously woven carcass ply unit is located at the center of the multi-layer continuous woven carcass ply structure 3, the second layer of continuously woven carcass ply unit is wound and bonded to the first layer of continuously woven carcass ply unit with an adhesive layer, and so on, each layer of continuously woven carcass ply units is bonded in sequence, wherein the first layer of continuously woven carcass ply unit is a single-layer continuously woven carcass ply, and the second to n-layer continuously woven carcass ply units are inner and outer double-layer continuously woven carcass ply, finally forming a multi-layer continuously woven carcass ply structure 3 with 2n-1 layers of continuously woven carcass ply in the radial direction of the tire.

[0056] The first layer of continuously woven carcass cord layer unit is a first layer of carcass cord tube formed by continuously and evenly wrapping and zigzagging the cords on the apex rubber layer 2 and the wire ring structure 1 after being coated with rubber.

[0057] The 2nd to nth layer continuous woven carcass cord layer units are formed by continuously and evenly winding in a zigzag pattern with a certain tension and angle on the outer surface of the first layer of continuous woven carcass cord layer after the cords are coated with rubber. No spacing is retained between each section of cords. At the same time, the 2nd to nth layer carcass cord tubes are formed by calendering each layer of cords using an extrusion roller.

[0058] The angle between the arrangement direction of the single cord of the single-layer continuous woven carcass ply in the multi-layer continuous woven carcass ply structure 3 and the tire axial direction is 0.1° to 3° or -0.1° to -3°, such as Figure 5 、 Figure 7 (a) and Figure 7 (b) shown.

[0059] The inner and outer angles of the single cord arrangement of the inner and outer double continuous woven carcass ply in the multi-layer continuous woven carcass ply structure 3 are parallel or symmetrically arranged, the demarcation point between the inner and outer is located at the center of the bead bottom, the included angle between the single cord arrangement direction and the tire axial direction is 0.1°-3° or -0.1°- -3°, such as Figure 6 、 Figure 8 (a) and Figure 8 (b) shown.

[0060] After the continuous zigzag arrangement of the cord rubber coating in the multi-layer continuous woven carcass ply structure 3, the connection mode of the starting point and the ending point is connected by butt joint or lap joint.

[0061] The position of the connection point generated by the continuous zigzag arrangement of the cord rubber coating in the multi-layer continuous woven carcass ply structure 3 is determined by the finite element method or the tension calculation formula;

[0062] The stress distribution of the tire with the multi-layer continuous woven carcass ply structure 3 under the conditions of inflation and load is calculated by the finite element method, and the position with the minimum cord tension is selected as the position of the cord connection point.

[0063] The thickness of the zigzag arranged cord rubber coating in the multi-layer continuous woven carcass ply structure 3 is 0.5-2 times the diameter D of the cord.

[0064] The multi-layer continuous woven carcass ply structure 3 uses single cord rubber coating (such as shown in Figure 11 ) or multiple rubber-coated cord groups (such as shown in Figure 12 ) to form a cord belt which is zigzag continuously and uniformly arranged on the bead structure 1 and the triangular rubber layer 2 to form a carcass ply drum.

[0065] The cords in the cord belt composed of multiple rubber-coated cords are uniformly distributed, and the number of cords is 2-8; the width of the rubber-coated cord belt is 1-20mm.

[0066] The cord used in the multi-layer continuous woven carcass ply structure 3 is steel wire, nylon, aramid, nylon and aramid mixed, polyester, or carbon fiber material, etc.

[0067] The continuous woven carcass ply units are connected by adhesion; or connected by an adhesive layer, and the thickness H of the adhesive layer is greater than the diameter D of the cord.

[0068] The multi-layer continuous woven carcass ply structure 3 is arranged by one cord or cord belt; or each layer of continuous woven carcass ply unit is separately zigzag arranged, and the starting point positions of the continuous woven carcass ply units are uniformly distributed at 360° angles.

[0069] The number of layers of the continuous woven carcass ply unit in the multi-layer continuous woven carcass ply structure 3 is 2-10.

[0070] Example 2:

[0071] Finite element analysis was performed on a conventional tire and a tire having a multi-layer continuous woven carcass ply structure (1° winding angle).

[0072] As shown in FIG. 1, a schematic diagram of the profile change of a conventional tire is shown, where the black profile is the design profile of the tire, the red profile is the inflated profile of the tire, and the blue profile is the loaded profile of the tire. Figure 13 As shown in FIG. 2, a schematic diagram of the profile change of a tire having a multi-layer continuous woven carcass ply structure (1° winding angle) is shown, where the black profile is the design profile of the tire, the red profile is the inflated profile of the tire, and the blue profile is the loaded profile of the tire.

[0073] Figure 14 The finite element analysis steps are as follows:

[0074] 1. Select the tire model to be analyzed, obtain the relevant geometric parameters and material parameters of the tire model, including the maximum width, maximum outer diameter, curvature radius, rubber modulus of elasticity, rubber Poisson's ratio, etc., and import them into the finite element calculation software;

[0075] 2. According to the above parameters, establish the tire finite element analysis model and complete the pre-processing of finite element calculation and analysis, including element establishment, material property assignment, mesh division, etc.;

[0076] 3. Import the finite element model completed by pre-processing into the finite element software calculation module for calculation to obtain the finite element analysis results of the tire;

[0077] 3. Import the finite element model completed by pre-processing into the finite element software calculation module for calculation to obtain the finite element analysis results of the tire;

[0078] Finite element analysis was performed on a conventional rubber tire and a tire having a multi-layer continuous woven carcass ply structure (1° winding angle), and the same boundary conditions were applied, i.e. an inflated pressure of 1.59 MPa and a load of 1.8570 x 10 5 N, and the contact patch width and sinkage of the two tires under the same boundary conditions were calculated and compared, as shown in Table 1. It can be found that the sinkage of the tire having a multi-layer continuous woven carcass ply structure is reduced by 4.92% compared to the conventional tire, and the maximum width after loading is reduced by 1.0%.

[0079]

[0080] Table 1

[0081] Example 3:

[0082] ​The effects of different wrap angles on the stiffness of a tire with a multi-layer continuous woven carcass ply structure were analyzed. Finite element analysis was performed on a tire with a multi-layer continuous woven carcass ply structure (1° wrap angle) and a tire with a multi-layer continuous woven carcass ply structure (2° wrap angle).

[0083] like Figure 14 The figure shows a schematic diagram of the outer contour change of a tire with a multi-layer continuous woven carcass cord structure (1° winding angle), where the black contour is the designed outer contour of the tire, the red contour is the inflated outer contour of the tire, and the blue contour is the loaded outer contour of the tire.

[0084] like Figure 15 The figure shows a schematic diagram of the outer contour change of a tire with a multi-layer continuous woven carcass cord structure (2° winding angle), where the black contour is the designed outer contour of the tire, the red contour is the inflated outer contour of the tire, and the blue contour is the loaded outer contour of the tire.

[0085] The results of the tires with the two carcass structures were analyzed, as shown in Table 2. It can be found that the sinkage of a tire with a multi-layer continuous woven carcass cord structure (1° winding angle) was reduced by 2.43% compared to a tire with a multi-layer continuous woven carcass cord structure (2° winding angle), and the maximum width after loading was reduced by 0.53%.

[0086]

[0087] Table 2

[0088] Example 4:

[0089] A tire having a multi-layer continuously woven carcass ply structure, the specific steps of manufacturing the tire are as follows:

[0090] S1. Arrangement of the first layer of carcass cord tube: prepare two steel ring structures and fix them in parallel at a certain distance, wrap the apex rubber layer on the steel ring structure along the circumferential direction, select a cord with rubber coating on the surface, reserve a certain length to fix it on one of the apex rubber layers, and then wrap it to the other apex rubber layer with a certain tension and angle. In this way, it is woven continuously 360 degrees along the circumferential direction, and the rubber-coated cord is pressed into a layer by an extrusion roller. Finally, the rubber-coated cord is connected at the calculated connection point to make the first layer of carcass cord tube.

[0091] S2. Arrangement of the 2nd to nth layer carcass ply tubes: Cover the upper and lower surfaces of the 1st layer carcass ply tube with rubber layers, select a rubber-coated cord, reserve a certain length, fix one end on the 1st layer carcass ply tube, wind it on the 1st layer carcass ply tube with a certain tension and angle, and use an extrusion roller to calender it, and finally connect the rubber-coated cord at the calculated connection point, thus making the 2nd layer carcass ply tube, which can be divided into upper and lower layers along the radial direction of the tire; similarly, the 3rd to nth layer carcass ply tubes can be arranged.

[0092] S3. Material preparation: Prepare other structural layers required for tire production, cut corresponding lengths of inner liner, shoulder rubber layer, sidewall rubber layer, rim cover layer, and bead rubber layer, and attach them to the carcass ply tube according to the structural size and position of the tire to obtain a semi-finished rubber tire component with a multi-layer continuously woven carcass ply structure;

[0093] S4, molding: filling the semi-finished component made in S3 with air at a certain pressure to shape the semi-finished component of the tire, and attaching the belt layer and the tread rubber layer by lamination to obtain an unvulcanized green tire with a multi-layer continuous woven carcass ply structure;

[0094] S5. Vulcanization: The green tire prepared in S4 is heated and pressurized for vulcanization using a vulcanizer. After vulcanization is completed, a tire having a multi-layer continuously woven carcass cord layer structure is obtained.

[0095] The rubber tire is manufactured through four steps of arrangement, material preparation, molding and vulcanization. The manufacturing process of the tire is simple and convenient, which can improve the production efficiency of the rubber tire and ensure reliable quality.

[0096] The first layer of continuously woven carcass ply unit is covered with a steel bead structure and an apex rubber layer. It is a first layer of carcass ply tube formed by continuously woven and evenly arranged cords on the apex rubber layer and steel bead layer after being covered with rubber. The two steel bead structures are fixed in parallel at a certain distance.

[0097] The single cord arrangement direction in the multi-layer continuous woven carcass ply structure forms an angle of 0.1° to 3° or -0.1° to -3° with the tire's axial direction;

[0098] The width of the cord tape formed by the adhesive of a single cord is b, the thickness is h, and the radius of the wire ring structure covered with the triangle rubber layer is R. rim The cross section of the wire ring structure is approximately a circular cross section, and its diameter is d. The number of turns of the cord tape in the first layer of continuous woven carcass ply is N1, which can be calculated according to formula (1). The number of turns of the cord tape in the second to nth layers of continuous woven carcass ply is N n , can be calculated according to formula (2);

[0099] according to Figure 3 As shown in the figure, the first layer of continuous woven carcass ply unit is composed of continuous weaving arrangement, and the spacing between the cord tapes at each end is b; each winding is composed of two sections of cord tapes arranged, and a total of 2N1 sections of cord tapes are continuously woven and arranged in the entire single-layer carcass ply. Then formula (1) is:

[0100]

[0101] according to Figure 4 As shown, the 2nd to nth layers of continuous woven carcass ply units are composed of continuous woven arrangements. The thickness of the adhesive between each carcass ply is H. Each time a circle is wound, the upper and lower layers of the carcass ply tube are each composed of a section of cord tape arranged. The spacing between each two sections of cord tape is 0. A total of N continuous woven arrangements are arranged in the entire carcass ply. n For a segment of cord tape, formula (2) is:

[0102]

[0103] When the tire is formed, the single-layer carcass cord tube will be deformed and the radius of each part will change, such as Figure 13 As shown, where R rim is the contact radius of the rim, R d is the radius of the tire's maximum width. The maximum radius of the first layer of continuously woven carcass ply unit after the tire is formed. The density of the cord arrangement in the first layer of carcass ply tube composed of continuous woven arrangement is expressed by ρ1 (unit: segment / mm). The density of the cord arrangement in each part of the first layer of continuously woven carcass ply after forming is As shown in formulas (3) to (5).

[0104]

[0105]

[0106]

[0107] Similarly, the density of the cord arrangement in each part of the 2nd to nth layers of continuously woven carcass ply after forming As shown in formulas (6) to (9).

[0108]

[0109]

[0110]

[0111] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A tire having a multi-layer continuously woven carcass ply structure, characterized in that: The invention comprises a wire bead structure (1), an apex rubber layer (2) and a multi-layer continuous woven carcass cord layer structure (3), wherein the wire bead structure (1) and the apex rubber layer (2) are both arranged inside the multi-layer continuous woven carcass cord layer structure (3), and the apex rubber layer (2) is coated on the outside of the wire bead structure (1); The multi-layer continuous woven carcass ply structure (3) comprises n layers of continuously woven carcass ply units, wherein the first layer of continuously woven carcass ply units is located at the center of the multi-layer continuous woven carcass ply structure (3), the second layer of continuously woven carcass ply units is wound and bonded to the first layer of continuously woven carcass ply units with an adhesive layer, and so on, each layer of continuously woven carcass ply units is bonded in sequence, wherein the first layer of continuously woven carcass ply units is a single-layer continuously woven carcass ply, and the second to n-layer continuously woven carcass ply units are inner and outer double-layer continuously woven carcass ply units, and finally a multi-layer continuously woven carcass ply structure (3) having 2n-1 layers of continuously woven carcass ply is formed in the radial direction of the tire; The positions of the connection points generated by the continuous zigzag arrangement of the rubber-coated cords in the multi-layer continuously woven carcass cord layer structure (3) are determined by the finite element method or the tension calculation formula; The stress distribution of a tire having a multi-layer continuous woven carcass cord layer structure (3) under inflation and load conditions is calculated using the finite element method, and the position where the cord tension is minimum is selected as the position of the cord connection point.

2. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, characterized in that: The tire also includes a shoulder rubber layer (5), a sidewall rubber layer (4) and a tread rubber layer (11); an airtight layer (10) is provided on the inner side of the multi-layer continuous woven carcass cord layer structure (3); and a multi-layer belt cord layer structure (9) is provided on the outer side of the multi-layer continuous woven carcass cord layer structure (3); the shoulder rubber layer (5), the sidewall rubber layer (4) and the tread rubber layer (11) are all attached to the multi-layer continuous woven carcass cord layer structure (3); and the multi-layer belt cord layer structure (9) is attached with a tread lower layer (6), a tread upper layer (7) and a cap layer (8).

3. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, characterized in that: The first layer of continuously woven carcass cord layer unit is a first layer of carcass cord tube formed by continuously and evenly covering and zigzagging the cords on the apex rubber layer (2) and the wire ring structure (1) after being coated with rubber.

4. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The second to nth layer of continuously woven carcass cord layer units are formed by continuously and evenly winding in a zigzag shape with a certain tension and angle on the outer surface of the first layer of continuously woven carcass cord layer with an adhesive layer after the cords are coated with rubber, and no spacing is retained between each section of cord. At the same time, the second to nth layer of carcass cord tubes are formed by calendering each layer of cords using an extrusion roller.

5. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The angle between the arrangement direction of a single cord of a single-layer continuously woven carcass cord layer in the multi-layer continuously woven carcass cord layer structure (3) and the tire axial direction is 0.1° to 3° or -0.1° to -3°.

6. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The inner and outer double-layer continuous woven carcass cord layers in the multi-layer continuous woven carcass cord layer structure (3) have inner and outer double-layer continuous woven carcass cord layers arranged with inner angles and outer angles that are parallel or symmetrically arranged, a dividing point between the inner and outer sides is located at the bottom center of the wire ring, and an angle between the arrangement direction of the single cord and the axial direction of the tire is 0.1° to 3° or -0.1° to -3°.

7. A tire with a multi-layer continuously woven carcass ply structure according to claim 3 or 4, characterized in that: After the rubber-coated cords in the multi-layer continuously woven carcass cord layer structure (3) are arranged in a continuous zigzag pattern, the starting point and the end point are connected by butt-jointing or overlapping.

8. A tire with a multi-layer continuously woven carcass ply structure according to claim 3 or 4, characterized in that: The thickness of the zigzag-shaped rubber-coated cords in the multi-layer continuously woven carcass cord layer structure (3) is 0.5-2 times the cord diameter D.

9. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The multi-layer continuously woven carcass cord layer structure (3) uses a single rubber-coated cord or a cord tape composed of multiple rubber-coated cords, which is continuously and evenly arranged in a zigzag shape on the apex rubber layer (2) and the wire ring structure (1) to form a carcass cord tube.

10. The tire having a multi-layer continuously woven carcass ply structure according to claim 9, characterized in that: The cords in the cord belt composed of the plurality of rubber-coated cords are evenly distributed, and the number of the cords is 2 to 8; the width of the rubber-coated cord belt is 1 to 20 mm.

11. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, characterized in that: The multi-layer continuous braided carcass cord layer structure (3) uses a cord made of steel wire, nylon, aramid, a mixture of nylon and aramid, polyester, or carbon fiber.

12. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The continuously woven carcass ply units are bonded together; Alternatively, the cords are connected by an adhesive layer, wherein the thickness H of the adhesive layer is greater than the diameter D of the cords.

13. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, characterized in that: The multi-layer continuous woven carcass ply structure (3) is made by arranging a single cord or a cord tape; Or each layer of the continuously woven carcass ply units is arranged in a zigzag pattern, and the starting points of each layer of the continuously woven carcass ply units are evenly distributed within a 360° angle.

14. The tire having a multi-layer continuously woven carcass ply structure according to claim 1, wherein: The number of layers of the continuously woven carcass ply units in the multi-layer continuously woven carcass ply structure (3) is 2 to 10.

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