Tire crown cord fabric structure

Abstract

The invention relates to the technical field of automobile tires, in particular to a tire crown cord fabric structure which comprises tire crown upper layer rubber, tire crown lower layer rubber, a belted layer, tire shoulder pad rubber and a tire body, the belted layer comprises a first belted, a second belted and a third belted which are laminated from top to bottom, and the tire crown cord fabric structure further comprises a buffer layer and a winding belted; the buffer layer is arranged between the first belt bundle and the second belt bundle, and the two winding belt bundles are symmetrically wound on the two sides of the first belt bundle; the buffer layer is arranged between the first belt and the second belt, so that the buffer effect of the crown part of the tire is improved, the belt is wound on the shoulder part of the first belt, the tire shoulder is prevented from bursting in cooperation with the buffer layer, and the problem that in the prior art, under the severe use environments such as overpressure and overload, the tire shoulder bursts is solved. The all-steel radial tire solves the technical problems that the all-steel radial tire cannot well bear the influence caused by vehicles, cargos and severe road surfaces, and the defects such as crown bursting and shoulder cracking are prone to occurring, and the service life of the tire is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile tires, and particularly to a tire crown ply structure. Background Art

[0002] All-steel radial tires are tires with steel wires as the skeleton material, which are widely used in large vehicles such as trucks, buses, and construction machinery. All-steel radial tires are suitable for operating environments with high loads and high pressures. Especially for engineering vehicles that travel on harsh road conditions all year round, they are affected by various factors such as high temperature, low temperature, wet and slippery, rough, and muddy conditions. Therefore, all-steel radial tires need to have good impact resistance and durability. And the structure of the tire crown is an important factor in ensuring that the tire has good impact resistance and durability.

[0003] Generally, the structure of the tire crown consists of components such as crown rubber, base rubber, several layers of belt plies, shoulder pad rubber, carcass, and inner liner. Common belt structures include three-layer belt structure, two-layer zero-degree wound belt plus three-layer belt structure, and four-layer belt structure.

[0004] However, in harsh usage environments such as overpressure and overload, all-steel radial tires cannot well withstand the impacts brought by the vehicle, the cargo, and the harsh road surface, and are prone to defects such as crown cracking and shoulder cracking, which seriously affect the service life of the tires. Summary of the Invention

[0005] The purpose of the present invention is to provide a tire crown ply structure and a motor vehicle using the same, so as to solve the technical problems in the prior art that all-steel radial tires are difficult to withstand the impacts brought by the vehicle, the cargo, and the harsh road surface in harsh usage environments such as overpressure and overload, are prone to defects such as crown cracking and shoulder cracking, and seriously affect the service life of the tires.

[0006] In a first aspect, a tire crown ply structure provided by the present invention includes a crown upper rubber, a crown lower rubber, a belt layer, a shoulder pad rubber, and a carcass. The belt layer includes a first belt, a second belt, and a third belt stacked from top to bottom, and further includes a buffer layer and a winding belt. The buffer layer is disposed between the first belt and the second belt, and the two winding belts are symmetrically wound around the shoulders of the first belt.

[0007] Further, the buffer layer includes a buffer film and nylon wrapper. The two nylon wrappers are respectively disposed on both sides of the buffer film and are in contact with the buffer film.

[0008] Further, the cross-sectional width of the crown upper rubber in the vertical direction is K, and the range of the cross-sectional length of the buffer film in the vertical direction is from K / 12 to K / 6.

[0009] Further, the cross-sectional length of the buffer layer in the vertical direction is greater than 1.2 times the cross-sectional length of the second belt in the vertical direction.

[0010] Further, the cross-sectional length of the buffer layer in the vertical direction is less than 1.5 times the cross-sectional length of the second belt in the vertical direction.

[0011] Further, the distance between the two winding belts is greater than K / 3 and less than K / 2.

[0012] Further, the cross-sectional length of the buffer layer in the vertical direction is greater than the sum of the cross-sectional lengths of the two winding belts in the vertical direction and the distance between the two winding belts.

[0013] Further, the sum of the cross-sectional lengths of the two winding belts in the vertical direction and the distance between the two winding belts is greater than 1.1 times the cross-sectional length of the second belt in the vertical direction.

[0014] Further, the sum of the cross-sectional lengths of the two winding belts in the vertical direction and the distance between the two winding belts is less than 1.2 times the cross-sectional length of the second belt in the vertical direction.

[0015] Compared with the prior art, a tire crown ply structure provided by the present invention includes a crown upper rubber, a crown lower rubber, a belt layer, a shoulder cushion rubber and a carcass. The belt layer includes a first belt, a second belt and a third belt which are stacked from top to bottom, and further includes a buffer layer and winding belts; the buffer layer is disposed between the first belt and the second belt, and the two winding belts are symmetrically wound around both sides of the first belt; by providing a buffer layer between the first belt and the second belt, the buffer effect of the tire crown is improved, and by providing winding belts at the shoulders of the first belt and cooperating with the buffer layer to prevent shoulder blowout, the technical problem that in the prior art, under harsh use environments such as overpressure and overload, all-steel radial tires cannot well withstand the impacts brought by vehicles, goods and harsh road surfaces, and are prone to defects such as crown cracking and shoulder cracking is solved, and the service life of the tire is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the overall structural cross-sectional view of the tire crown ply structure provided by the embodiment of the present invention; Figure 2 It is a sectional development view of the tire crown ply structure provided by the invention embodiment.

[0018] Reference numerals: 100, crown upper rubber; 200, crown lower rubber; 300, belt layer; 310, first belt; 320, second belt; 330, third belt; 400, buffer layer; 410, buffer rubber sheet; 420, nylon wrapper; 500, winding belt; 600, tire cushion rubber. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0021] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. 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 therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0023] In addition, terms such as "horizontal", "vertical", "suspended", etc. do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. 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 situations.

[0025] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0026] As Figure 1 and Figure 2 shown, the present invention provides a tire crown ply structure, including a crown upper rubber 100, a crown lower rubber 200, a belt layer 300, a tire cushion rubber 600 and a carcass. The belt layer 300 includes a first belt 310, a second belt 320 and a third belt 330 which are stacked from top to bottom, and further includes a buffer layer 400 and a winding belt 500; the buffer layer 400 is disposed between the first belt 310 and the second belt 320, and two winding belts 500 are symmetrically wound around the shoulders of the first belt 310.

[0027] That is, the tire crown ply structure provided by the present invention improves the buffer effect of the tire crown by providing a buffer layer 400 between the first belt 310 and the second belt 320, and prevents shoulder bursting by winding the winding belt 500 around the shoulders of the first belt 310 and cooperating with the buffer layer 400, solving the technical problem that in the prior art, under harsh use environments such as overpressure and overload, all-steel radial tires cannot well withstand the impacts brought by vehicles, goods and harsh road surfaces, and are prone to problems such as crown cracking and shoulder cracking, and improving the service life of the tire.

[0028] Specifically, in this embodiment, the upper half of the tire in the vertical direction is composed of the crown upper rubber 100, the crown lower rubber 200, the belt layer 300, the winding belt 500, the nylon wrapper 420, the buffer rubber sheet 410, the belt clamping rubber, the tire cushion rubber 600, and the carcass. It is presented in a stacked manner from top to bottom in the cross-sectional view in the vertical direction. The first belt 310, the second belt 320, and the third belt 330 are stacked from top to bottom, and the buffer layer 400 is arranged between the first belt 310 and the second belt 320 to protect the carcass and the inner liner and withstand external forces. The winding belt 500 is arranged at both ends of the first belt 310 by zero-degree winding. The tire crown is symmetrically arranged with the midline in the horizontal direction in the cross-sectional view. Thus, the crown width can be evenly divided into three sections, namely the crown middle part and the two crown edge parts. The cross-sectional width of the crown upper rubber 100 in the vertical direction is the crown width K. Among the three belts, the second belt 320 has the widest width, and the distances from both ends of it to the midline are equal, both being L. The distance from the starting point of the zero-degree winding belt 500 to the midline is h1, the width of the zero-degree winding belt 500 is c, and the width of the nylon wrapper 420 is b.

[0029] Further, the buffer layer 400 includes the buffer rubber sheet 410 and the nylon wrapper 420. The two nylon wrappers 420 are respectively arranged on both sides of the buffer rubber sheet 410 and are in contact with the buffer rubber sheet 410.

[0030] Specifically, the buffer rubber sheet 410 is arranged in the crown middle part, and the starting points of the nylon wrappers 420 are the two end points of the buffer rubber sheet 410. This enables the two nylon wrappers 420 to be respectively arranged on both sides of the buffer rubber sheet 410 and be in contact with the buffer rubber sheet 410. The buffer rubber sheet 410 is made of rubber material and is used to withstand the pressure in the crown middle part, while the nylon wrapper 420 is made of nylon material and is wound around the crown edge part at zero degree to prevent the shoulder of the tire from bursting.

[0031] Preferably, the cross-sectional width of the crown upper rubber 100 in the vertical direction is K, and the range of the cross-sectional width of the buffer rubber sheet 410 in the vertical direction is from K / 12 to K / 6.

[0032] Specifically, the cross-sectional width of the buffer rubber sheet 410 in the vertical direction is twice the distance from both ends of the buffer rubber sheet 410 to the midline in the cross-sectional view. The distance from the starting point of the nylon wrapper 420 to the midline is h, and the cross-sectional width of the buffer rubber sheet 410 in the vertical direction is 2h. In this embodiment, K / 6 > h > K / 12, so that the buffer rubber sheet 410 will not be too short to lose the buffering effect, nor will it be too long to cause the starting point of the nylon wrapper 420 to deviate from the crown middle part and affect the winding effect.

[0033] Further, the cross-sectional width of the buffer layer 400 in the vertical direction is greater than 1.2 times the cross-sectional width of the second belt 320 in the vertical direction.

[0034] Specifically, the cross-sectional width of the buffer layer 400 in the vertical direction is twice the sum of the distance h from the starting point of the nylon wrapper 420 fitting to the center line and the width b of the nylon wrapper 420, while the cross-sectional width of the second belt layer 320 in the vertical direction is twice the distance L between both ends of the second belt layer 320 and the center line. Therefore, the cross-sectional width of the buffer layer 400 in the vertical direction is more than 1.2 times the cross-sectional width of the second belt layer 320 in the vertical direction, that is, (h + b) / L > 1.2. Thus, it can ensure that the buffer layer 400 can wrap the second belt layer 320 and the third belt layer 330, and extend above the tire cushion gum 600 at both ends of the second belt layer 320 and the third belt layer 330, achieving the effect of strengthening the shoulder strength, effectively preventing shoulder cracks, enhancing the shoulder support force, increasing the rectangular coefficient of the ground contact mark, and improving the tire handling performance.

[0035] Furthermore, the cross-sectional width of the buffer layer 400 in the vertical direction is less than 1.5 times the cross-sectional width of the second belt layer 320 in the vertical direction.

[0036] Specifically, the cross-sectional width of the buffer layer 400 in the vertical direction is twice the sum of the distance h from the starting point of the nylon wrapper 420 fitting to the center line and the width b of the nylon wrapper 420, while the cross-sectional width of the second belt layer 320 in the vertical direction is twice the distance L between both ends of the second belt layer 320 and the center line. Therefore, the cross-sectional width of the buffer layer 400 in the vertical direction is less than 1.5 times the cross-sectional width of the second belt layer 320 in the vertical direction, that is, (h + b) / L > 1.5. Thus, it can prevent the buffer layer 400 from extending too much into the tire shoulder, which is beneficial to the shoulder heat dissipation and can prevent the shoulder from generating too much heat and affecting the fatigue life of the tire.

[0037] Furthermore, the distance between the two winding belt layers 500 is greater than K / 3, and the distance between the two winding belt layers 500 is greater than K / 2.

[0038] Specifically, the distance between the two winding belt layers 500 is twice the distance h1 from the starting point of the zero-degree winding belt layer 500 fitting to the center line. Therefore, the distance between the two winding belt layers 500 is greater than K / 3, that is, h1 > K / 6. Thus, it can ensure that the starting point of the winding belt layer 500 winds around the tire shoulder at the crown edge, preventing the tire shoulder from bursting. And the distance between the two winding belt layers 500 is less than K / 2, that is, h1 < K / 4. Thus, it can ensure that the winding belt layer 500 can completely cover both ends of the first belt layer 310, achieving the effect of strengthening the shoulder strength, effectively preventing shoulder cracks, enhancing the shoulder support force, increasing the rectangular coefficient of the ground contact mark, and improving the tire handling performance.

[0039] Furthermore, the cross-sectional width of the buffer layer 400 in the vertical direction is greater than the sum of the cross-sectional widths of the two winding belt layers 500 in the vertical direction and the distance between the two winding belt layers 500.

[0040] Specifically, the cross-sectional width of the buffer layer 400 in the vertical direction is h + b, and the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is h1 + c. The cross-sectional width of the buffer layer 400 in the vertical direction is greater than the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500, that is, h + b > h1 + c. Thus, it can be ensured that the width of the winding belt bundle 500 is less than the width of the buffer layer 400, and then the winding belt bundle 500 and the nylon wrapper 420 are arranged in a stepped manner on the tread cushion 600. When the nylon wrapper 420 partially covers the upper part of the tread cushion 600, the zero-degree winding belt bundle 500 completely wraps the endpoints of the second belt bundle 320 and does not completely cover the tread cushion 600, which is beneficial to shoulder heat dissipation and prevents excessive heat generation in the shoulder from affecting the fatigue life of the tire.

[0041] Further, the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is greater than 1.1 times the cross-sectional width of the second belt bundle 320 in the vertical direction.

[0042] Specifically, the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is h1 + c. The cross-sectional width of the second belt bundle 320 in the vertical direction is L. The sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is greater than 1.1 times the cross-sectional width of the second belt bundle 320 in the vertical direction, that is, (h1 + c) / L > 1.1. This ensures that the winding belt bundle 500 can completely wrap the two ends of the second belt bundle 320 and the third belt bundle 330, achieving the effect of enhancing the shoulder rigidity.

[0043] Preferably, the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is less than 1.2 times the cross-sectional width of the second belt bundle 320 in the vertical direction.

[0044] Specifically, the sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is h1 + c. The cross-sectional width of the second belt bundle 320 in the vertical direction is L. The sum of the cross-sectional widths of the two winding belt bundles 500 in the vertical direction and the distance between the two winding belt bundles 500 is less than 1.2 times the cross-sectional width of the second belt bundle 320 in the vertical direction, that is, (h1 + c) / L < 1.2. Thus, it is ensured that the width of the winding belt bundle 500 covering the upper part of the wrapper is appropriate and does not overly affect the heat generation in the shoulder.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tire crown ply structure, comprising a crown upper rubber (100), a crown lower rubber (200), a belt layer (300), a tire cushion rubber (600) and a carcass, wherein the belt layer (300) comprises a first belt (310), a second belt (320) and a third belt (330) which are stacked from top to bottom, and is characterized in that, It further includes a buffer layer (400) and winding belt plies (500); The buffer layer (400) is disposed between the first belt ply (310) and the second belt ply (320), and the two winding belt plies (500) are symmetrically wound around the shoulders of the first belt ply (310).

2. The tire crown ply structure according to claim 1, characterized in that, The buffer layer (400) includes buffer rubber sheets (410) and nylon wrapper fabrics (420). The two nylon wrapper fabrics (420) are respectively disposed on both sides of the buffer rubber sheets (410) and are in contact with the buffer rubber sheets (410).

3. The tire crown ply structure according to claim 2, characterized in that, The cross-sectional width of the crown top rubber (100) in the vertical direction is K, and the range of the cross-sectional width of the buffer rubber sheets (410) in the vertical direction is from K / 12 to K / 6.

4. The tire crown ply structure according to any one of claims 1-3, characterized in that, The cross-sectional width of the buffer layer (400) in the vertical direction is greater than 1.2 times the cross-sectional length of the second belt ply (320) in the vertical direction.

5. The tire crown ply structure according to any one of claims 1-3, characterized in that, The cross-sectional width of the buffer layer (400) in the vertical direction is less than 1.5 times the cross-sectional length of the second belt ply (320) in the vertical direction.

6. The tire crown ply structure according to claim 3, characterized in that, The spacing between the two winding belt plies (500) is greater than K / 3 and less than K / 2.

7. The tire crown ply structure according to any one of claims 1-3, characterized in that, The cross-sectional width of the buffer layer (400) in the vertical direction is greater than the sum of the cross-sectional widths of the two winding belt plies (500) in the vertical direction and the spacing between the two winding belt plies (500).

8. The tire crown ply structure according to any one of claims 1-3, characterized in that, The sum of the cross-sectional widths of the two winding belt plies (500) in the vertical direction and the spacing between the two winding belt plies (500) is greater than 1.1 times the cross-sectional width of the second belt ply (320) in the vertical direction.

9. The tire crown ply structure according to any one of claims 1-3, characterized in that, The sum of the cross-sectional widths of the two winding belt plies (500) in the vertical direction and the spacing between the two winding belt plies (500) is less than 1.2 times the cross-sectional length of the second belt ply (320) in the vertical direction.

Images