Tire belted layer structure and truck radial tire

Abstract

The tire belted layer structure comprises a first belted layer, a second belted layer and multiple sections of cushion rubber, the multiple sections of cushion rubber are symmetrically arranged between the first belted layer and the second belted layer, and the multiple sections of cushion rubber comprise a plurality of inner cushion parts, flat cushion parts and outer cushion parts which are sequentially arranged from inside to outside. The bottoms of the inner pad parts, the flat pad parts and the outer pad parts are connected and are bottom planes, the outer pad parts are provided with outer inclined top surfaces with low outer parts and high inner parts, the top surfaces of the sub-pads of the inner pad parts are sequentially connected, the inclination degrees of the top surfaces of the sub-pads from inside to outside are sequentially reduced, and the height of the outer end of the outer pad part and the height of the inner end of the inner pad part located on the innermost side are not zero. The top surface of the flat pad part is a top plane, the width of the flat pad part is larger than that of the inner pad part and the outer pad part, the two sides of the top surface of the flat pad part are connected to the top surfaces and the outer inclined top surfaces of the adjacent sub-pads respectively, segmented steps on the tops of the multiple pad rubber sections are in smooth transition, and the shoulder vacancy condition of the truck radial tire is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty radial tire technology, specifically to a tire belt layer structure and a heavy-duty radial tire. Background Technology

[0002] Tires are the automotive components that come into direct contact with the ground, and their performance directly affects vehicle safety. Heavy-duty radial tires are a type of tire that, due to their heavy load and long mileage, have higher durability requirements than ordinary tires. Currently, heavy-duty radial tires on the market occasionally experience shoulder gaps during operation, leading to delamination. This phenomenon often occurs at the end gasket positions between the belt layers. Existing belt layer gaskets often use a three-section trapezoidal structure. After being combined with the belt layers, the large difference in transition steps at the inner end can easily affect the quality of the belt layer composite, potentially leading to poor air circulation and causing shoulder gaps during tire operation. This is detrimental to further ensuring the durability of heavy-duty radial tires. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and to provide a tire belt layer structure and a heavy-duty radial tire.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, embodiments of this application provide a tire belt layer structure, including a first belt layer, a second belt layer, and multiple rubber segments. The multiple rubber segments are symmetrically arranged between the first belt layer and the second belt layer. Each rubber segment includes a plurality of inner pads, flat pads, and outer pads arranged sequentially from the inside out. The bottoms of the inner pads, flat pads, and outer pads are connected and form a bottom plane. The outer pad has an outwardly inclined top surface that is lower on the outside and higher on the inside. The top surfaces of the sub-pads of the plurality of inner pads are connected sequentially, and the inclination of the top surfaces of the sub-pads decreases sequentially from the inside out. The height of the outer end of the outer pad and the height of the inner end of the innermost inner pad are both not zero. The top surface of the flat pad is a top plane. The width of the flat pad is greater than the width of the inner pad and the outer pad. The two sides of the top surface of the flat pad are respectively connected to the top surfaces of the adjacent sub-pads and the outwardly inclined top surfaces.

[0006] In some embodiments of this utility model, the width of the flat pad is 9-13mm and the height of the flat pad is 2-4mm.

[0007] In some embodiments of this utility model, the width of the outer pad is 5-7 mm.

[0008] In some embodiments of this invention, the width of the innermost pad is smaller than the width of the other pads.

[0009] In some embodiments of this utility model, the width of the inner pad is 3-10mm, the width of the innermost inner pad is 3-5mm, and the width of the remaining inner pads is 5-10mm.

[0010] In some embodiments of this utility model, the height of the outer end of the outer pad is 0.3-0.5mm.

[0011] In some embodiments of this utility model, the inner end height of the innermost inner pad is 0.3-0.5mm, and the contact end height between the innermost inner pad and its adjacent inner pad is 0.5-1.5mm.

[0012] In some embodiments of this utility model, the number of inner pads is set to 3, and the inner pads include a first pad located on the innermost side, a second pad adjacent to the first pad, and a third pad located on the other side of the second pad.

[0013] In some embodiments of this utility model, the first belt layer and the second belt layer are centered and bonded together, the inner pad, the flat pad, and the outer pad are integrally formed, the second belt layer is bonded to the first belt layer, and multiple segments of adhesive pads are bonded and wrapped between the first belt layer and the second belt layer.

[0014] In another aspect, this utility model also provides a heavy-duty radial tire, which includes a tire belt layer structure as described in any of the above embodiments.

[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following advantages:

[0016] Beneficial effects:

[0017] 1. The symmetrical arrangement of multiple rubber pads helps maintain the shape and structural stability of the tire. The smooth transition of the top steps of the multiple rubber pads effectively improves the shoulder gap of heavy-duty radial tires, which is conducive to further ensuring the durability of heavy-duty radial tires.

[0018] 2. The height of the outer end of the outer pad and the height of the inner end of the innermost pad are not zero. This avoids the sharp angle structure at both ends of the multi-segment pad, which helps to alleviate stress concentration and reduce fatigue and cracking of the materials at both ends caused by stress concentration.

[0019] 3. The width of the flat pad is greater than the width of the inner pad and the outer pad. The flat pad ensures sufficient support area to make the connection between the first belt layer and the second belt layer stable. At the same time, in conjunction with the outwardly inclined top surface of the outer pad and the upwardly inclined sub-pad top surface of the inner pad, it helps to better distribute pressure and reduce local stress concentration. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 For the present utility model Figure 1 Enlarged view of point A;

[0023] Explanation of key figure labels:

[0024] 1. First belt layer; 2. Second belt layer; 3. Multi-segment padding; 30. Outer pad; 31. Outer inclined top surface; 32. Flat pad; 33. Top plane; 34. Inner pad; 35. Sub-pad top surface; 36. First pad; 37. Second pad; 38. Third pad; 39. Bottom plane; h1. Outer end height; h2. Inner end height. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0027] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0028] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0029] In the claims, description and accompanying drawings of this utility model, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0030] See the example. Figure 1-2 :

[0031] A tire belt layer structure includes a first belt layer 1, a second belt layer 2, and multiple rubber segments 3. The multiple rubber segments 3 are symmetrically arranged between the first belt layer 1 and the second belt layer 2. The symmetrical arrangement helps to ensure uniform stress and maintain tire balance and structural stability. The first belt layer 1 is located on the lower side of the multiple rubber segments 3, and the second belt layer 2 is located on the upper side of the multiple rubber segments 3.

[0032] The multi-segment pad 3 includes several inner pads 34, flat pads 32, and outer pads 30 arranged sequentially from the inside out;

[0033] Specifically, the bottoms of the inner pad 34, flat pad 32, and outer pad 30 are connected and form a bottom plane 39, which facilitates the adhesion of the bottom of the multi-segment pad 3 to the first belt layer 1; the top surface of the flat pad 32 is a top plane 33, and the outer pad 30 is provided with an outwardly inclined top surface 31 that is lower on the outside and higher on the inside. The sub-pad top surfaces 35 of several inner pads 34 are connected in sequence, and the inclination of the sub-pad top surfaces 35 decreases from the inside to the outside, which effectively improves the shoulder gap of the heavy-duty radial tire, thereby effectively reducing the delamination caused by the shoulder gap during driving due to the heavy load and long mileage of the heavy-duty radial tire. The top surfaces of the flat pad 32 are connected to the adjacent sub-pad top surfaces 35 and the outwardly inclined top surfaces 31 on both sides, which facilitates the adhesion of the top of the multi-segment pad 3 to the second belt layer 2.

[0034] The height h1 of the outer end of the outer pad 30 and the height h2 of the inner end of the innermost pad 34 are both not 0. Since the segment pad rubber located between the first belt layer 1 and the second belt layer 2 is in a critical stress-bearing part, avoiding the sharp angle structure at both ends of the multi-segment pad rubber 3 helps to alleviate stress concentration and reduce material fatigue and cracking caused by stress concentration. At the same time, during the bonding process between the second belt layer 2 and the multi-segment pad rubber 3, the contact area increases, making the bond between the multi-segment pad rubber 3 and the second belt layer 2 tighter, thus enhancing the stability and reliability of the tire structure.

[0035] The width of the flat pad 32 is greater than the width of the inner pad 34 and the outer pad 30. The wider flat pad 32 ensures sufficient support area, making the connection between the first belt layer 1 and the second belt layer 2 stable. When the tire is subjected to various forces during driving, the outer inclined top surface 31 of the outer pad 30 and the inclined sub-pad top surface 35 of the inner pad 34 help to better distribute pressure and reduce local stress concentration.

[0036] It is understood that the side of the multi-segment pad 3 facing the other multi-segment pad 3 that is symmetrically arranged with it is the inner side, and the side of the multi-segment pad 3 away from the other multi-segment pad 3 that is symmetrically arranged with it is the outer side.

[0037] The first belt layer 1 and the second belt layer 2 are centered and bonded together. The inner pad 34, the flat pad 32, and the outer pad 30 are integrally formed. The second belt layer 2 is bonded to the first belt layer 1, and multiple segments of padding adhesive 3 are wrapped and bonded between the first belt layer 1 and the second belt layer 2.

[0038] In one embodiment, the width of the flat pad portion 32 is 9-13 mm, and the width of the outer pad portion 30 is 5-7 mm.

[0039] In one embodiment, the width of the innermost pad 34 is smaller than the width of the other pads 34.

[0040] In one embodiment, the width of the inner pad 34 is 3-10 mm, the width of the innermost inner pad 34 is 3-5 mm, and the width of the remaining inner pads 34 is 5-10 mm.

[0041] In one embodiment, the height h1 of the outer end of the outer pad 30 is 0.3-0.5 mm. Preferably, the height h2 of the inner end of the innermost pad 34 is 0.3-0.5 mm.

[0042] In one embodiment, the height of the flat pad 32 is 2-4 mm, and the contact height between the innermost pad 34 and its adjacent inner pad 34 is 0.5-1.5 mm.

[0043] In one embodiment, the number of inner pads 34 is set to three. Each inner pad 34 includes a first pad 36 located at the innermost side, a second pad 37 adjacent to the first pad 36, and a third pad 38 located on the other side of the second pad 37. It is understood that the other side of the third pad 38 is a flat pad 32. Preferably, the contact height between the third pad 38 and the second pad 37 is 1.5-3.0 mm, and the contact height between the second pad 37 and the first pad 36 is 0.5-1.5 mm. It is understood that the width of the first pad 36 is smaller than the widths of the second pad 37 and the third pad 38; the inclination of the sub-pad top surface 35 of the first pad 36, the second pad 37, and the third pad 38 decreases sequentially.

[0044] This application also provides a heavy-duty radial tire, which includes a tire belt layer structure as described in any of the above embodiments.

[0045] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A tire belt layer structure, characterized in that: The belt includes a first belt layer (1), a second belt layer (2), and multiple rubber pads (3). The multiple rubber pads (3) are symmetrically arranged between the first belt layer (1) and the second belt layer (2). Each multiple rubber pad (3) includes several inner pads (34), flat pads (32), and outer pads (30) arranged sequentially from the inside out. The bottoms of the inner pads (34), flat pads (32), and outer pads (30) are connected and form a bottom plane (39). The outer pads (30) are provided with an outwardly inclined top surface (31) that is lower on the outside and higher on the inside. The top surfaces (35) of the sub-pads (34) are connected in sequence, and the inclination of the top surfaces (35) of the sub-pads (35) decreases in sequence from the inside to the outside. The height (h1) of the outer end of the outer pad (30) and the height (h2) of the inner end of the inner pad (34) are not 0. The top surface of the flat pad (32) is the top plane (33). The width of the flat pad (32) is greater than the width of the inner pad (34) and the outer pad (30). The top surfaces of the flat pad (32) are connected to the adjacent top surfaces (35) of the sub-pads and the outer inclined top surfaces (31) on both sides respectively.

2. The tire belt layer structure according to claim 1, characterized in that: The width of the flat pad (32) is 9-13 mm, and the height of the flat pad (32) is 2-4 mm.

3. The tire belt layer structure according to claim 2, characterized in that: The width of the outer pad (30) is 5-7 mm.

4. The tire belt layer structure according to claim 1, characterized in that: The width of the innermost pad (34) is smaller than the width of the other pads (34).

5. A tire belt layer structure according to claim 4, characterized in that: The width of the inner pad (34) is 3-10 mm, the width of the innermost inner pad (34) is 3-5 mm, and the width of the remaining inner pads (34) is 5-10 mm.

6. The tire belt layer structure according to claim 1, characterized in that: The height (h1) of the outer end of the outer pad (30) is 0.3-0.5 mm.

7. A tire belt layer structure according to claim 1, characterized in that: The height (h2) of the innermost inner pad (34) is 0.3-0.5 mm, and the height of the contact end between the innermost inner pad (34) and its adjacent inner pad (34) is 0.5-1.5 mm.

8. A tire belt layer structure according to claim 1, characterized in that: The number of inner pads (34) is set to 3. The inner pads (34) include a first pad (36) located on the innermost side, a second pad (37) adjacent to the first pad (36), and a third pad (38) located on the other side of the second pad (37).

9. A tire belt layer structure according to claim 1, characterized in that: The first belt layer (1) and the second belt layer (2) are centered and bonded together. The inner pad (34), the flat pad (32), and the outer pad (30) are integrally formed. The second belt layer (2) is bonded to the first belt layer (1), and multiple segments of padding adhesive (3) are bonded and wrapped between the first belt layer (1) and the second belt layer (2).

10. A heavy-duty radial tire, characterized in that: The heavy-duty radial tire includes a tire belt layer structure as described in any one of claims 1-9.

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