All-steel radial tire
By adding the second pad glue to the shoulder pad composite of the all-steel radial tire to form a composite structure, the problem of delamination caused by insufficient viscosity of the shoulder pad is solved, and the rigidity and durability of the tire shoulder are improved. Reduces the incidence of shoulder emptyness.
Patent Information
- Application Number
- CN202411303441.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2024-12-27
AI Technical Summary
In the existing tire structure, the viscosity and fixed extension strength of the shoulder pad glue are low, resulting in easy disassembly between the belt layer and the shoulder pad glue, resulting in the problem of empty tire shoulders.
Design a fully steel radial tire, by adding a second pad glue to the shoulder pad composite part, forming a composite structure between the first pad glue and the second pad glue, and improving the belt layer structure and the shoulder pad glue The viscosity and stiffness transition reduce the probability of shoulder delamination.
It effectively improves the problem of shoulder emptying of tires, improves the rigidity of the crown and shoulders, prevents trough cracks, shoulder cracks and exposed lines, and improves the tire's durability and puncture resistance.
Smart Images
Figure CN119189555A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of radial tires, and in particular to an all-steel radial tire. Background Art
[0002] In the existing tire structure, Figure 1 As shown, the existing shoulder pad 4 is in direct contact with the existing belt layer 3. The viscosity and tensile strength of the existing shoulder pad 4 are low. During use, delamination between the existing belt layer 3 and the existing shoulder pad 4 is likely to occur, thereby causing the problem of tire shoulder void. Summary of the invention
[0003] The invention provides an all-steel radial tire, which is used to solve the problem that the belt layer and the tire shoulder pad rubber are easy to delaminate and thus produce tire shoulder voids.
[0004] On the one hand, the present invention provides an all-steel radial tire, including: a belt layer structure, which is arranged between the outer side of the carcass and the inner side of the crown, and the sidewalls are provided on both sides of the crown, and the crown, the sidewalls, the carcass and the belt layer structure are sequentially connected and enclosed to form a first cavity; a first cushion rubber is arranged in the first cavity, one side of which is adhered to the carcass, and the other side of which is adhered to the crown and the sidewalls; a second cushion rubber is arranged in the first cavity, one side of which is adhered to the first cushion rubber, and the other side of which is adhered to the belt layer structure and the crown.
[0005] In some embodiments, the belt structure comprises a first belt layer and a second belt layer, wherein the first belt layer is arranged on the outside of the carcass, and the second belt layer is arranged on the outside of the first belt layer; wherein,
[0006] The first belt layer, the second belt layer, the tread crown and the first cushion rubber are connected in sequence and enclosed to form a second cavity, and the second cushion rubber is arranged in the second cavity.
[0007] In some embodiments, the second pad glue includes a first region, a second region, and a third region connected in sequence; wherein,
[0008] The first area is arranged between the outer side of the first cushion rubber and the inner side of the end of the first belt layer;
[0009] The second area is arranged between the outer side of the first cushion rubber and the inner side of the end of the second belt layer;
[0010] The third area is arranged between the outer side of the first cushion rubber and the inner side of the tread crown.
[0011] In some embodiments, the side of the second pad rubber facing away from the first pad rubber includes a first bonding surface, a second bonding surface and a third bonding surface connected in sequence; wherein,
[0012] The first contact surface is contacted with the inner side of the end of the first belt layer, the second contact surface is contacted with the inner side of the end of the second belt layer, and the third contact surface is contacted with the inner side of the crown.
[0013] In some embodiments, the second gasket is a molded glue or a film.
[0014] In some of the embodiments, along a first direction A of arrangement of the carcass, the belt structure and the tread crown, the second cushion rubber partially covers the first cushion rubber.
[0015] In some embodiments, along the first direction A, the first region has a first thickness H1, the second region has a second thickness H2, and the third region has a third thickness H3; wherein,
[0016] Along the second direction B pointing from the crown to the sidewall, the first thickness H1 gradually increases, and the third thickness H3 gradually decreases.
[0017] In some embodiments, a first angle α is formed between the first bonding surface and the second bonding surface; wherein the first angle α ranges from 0° to 180°.
[0018] In some of the embodiments, a second angle β is formed between the second bonding surface and the third bonding surface; wherein the second angle β ranges from 0° to 180°.
[0019] In some embodiments, the second cushion rubber includes a first-formulated rubber, the belt structure includes a second-formulated rubber, and the first-formulated rubber is the same as or similar to the second-formulated rubber.
[0020] The beneficial effects of the present invention are as follows: the all-steel radial tire of the present invention comprises: a belt structure, which is arranged between the outer side of the carcass and the inner side of the crown, and sidewalls are arranged on both sides of the crown, and the crown, sidewalls, carcass and belt structure are connected in sequence and enclosed to form a first cavity; a first cushion rubber is arranged in the first cavity, one side of which is attached to the carcass and the other side is attached to the crown and sidewalls; a second cushion rubber is arranged in the first cavity, one side of which is attached to the first cushion rubber and the other side is attached to the belt structure and the crown, and the shoulder part can be effectively reduced by innovatively designing the shoulder part and changing it to a shoulder cushion rubber composite part, and only by adding a layer of second cushion rubber on the basis of the existing shoulder cushion rubber, the probability of shoulder delamination can be effectively reduced, and the shoulder space of the tire can be improved. Compared with the prior art, the present invention improves the traditional all-steel radial tire by changing the design of the all-steel radial tire to arrange the second cushion rubber on the first cushion rubber, thereby improving the viscosity and stiffness transition between the first cushion rubber and the belt structure, and reducing the shoulder space. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic diagram of an all-steel radial tire in the prior art;
[0022] Figure 2 is a schematic diagram of the existing pad rubber;
[0023] Figure 3 is a schematic diagram of an all-steel radial tire in an embodiment of the present invention;
[0024] Figure 4 yes Figure 3 A partial enlarged schematic diagram of a full steel radial tire;
[0025] Figure 5 yes Figure 3 middle, Figure 4 Schematic diagram of the first pad rubber and the second pad rubber.
[0026] In the figure: 1. existing air-tight layer; 2. existing carcass; 3. existing belt layer; 4. existing cushion rubber; 5. existing tread crown; 6. existing sidewall; 10. air-tight layer; 20. carcass; 30. belt structure layer; 31. first belt layer; 32. second belt layer; 33. third belt layer; 40. first cushion rubber; 50. tread crown; 60. sidewall; 70. second cushion rubber; 71. first zone; 72. second zone; 73. third zone; 711. first bonding surface; 721. second bonding surface; 731. third bonding surface. DETAILED DESCRIPTION
[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] As the background technology, the viscosity and tensile strength of the existing shoulder pad rubber 4 are relatively low, and delamination between the existing belt layer 3 and the existing shoulder pad rubber 4 is likely to occur during use, resulting in the problem of shoulder voids in the all-steel radial tire.
[0029] To solve the above problems, refer to Figure 3 to Figure 4The present invention provides an all-steel radial tire, comprising: a crown 50, a sidewall 60, a belt structure 30 and a shoulder pad composite. The sidewalls 60 are respectively provided on both sides of the crown 50, and the sidewalls 60 are used to bear the tire pressure or to be in direct contact with the wheel hub, and the sidewalls 60 and the crown 50 are connected by the shoulder pad composite. The belt structure 30 is arranged between the outer side of the carcass 20 and the inner side of the crown 50, and the belt structure 30 is used to tighten the carcass 20. The shoulder pad composite includes a first pad 40, which is arranged between the belt structure 30 and the carcass 20, the inner side of the first pad 40 is attached to the side of the carcass 20 facing the belt structure 30, and the outer side of the first pad 40 is partially attached to the inner side of the crown 50 and the inner side of the sidewall 6. The shoulder cushion rubber composite component further includes a second cushion rubber 70 , which is disposed between the belt structure 30 , the crown 50 , and the first cushion rubber 40 .
[0030] The all-steel radial tire provided by the present invention improves the shoulder pad rubber composite, adds a second pad rubber 70 on the basis of the first pad rubber 40, and the first pad rubber 40 is fixedly connected to the second pad rubber 70, which can effectively reduce the probability of shoulder delamination. By changing the design of the shoulder pad rubber composite, the traditional shoulder pad rubber is improved into a composite structure formed between the first pad rubber 40 and the second pad rubber 70 to adapt to the use of all-steel radial tires of different specifications and sizes. Through the design of the shoulder pad rubber composite of the all-steel radial tire, on the basis of the traditional shoulder pad rubber, the viscosity and stiffness transition between the shoulder pad rubber composite and the belt layer structure 30 are improved to reduce the shoulder space problem of the all-steel radial tire.
[0031] In addition, the all-steel radial tire further includes an airtight layer 10 disposed on the inner side of the carcass 20 .
[0032] In some of the embodiments, a first cavity is formed between the belt layer structure 30, the carcass 20, the crown 50 and the sidewall 60, and a first cushion rubber 40 and a second cushion rubber 70 are respectively arranged inside the first cavity, wherein the first cushion rubber 40 is filled in the first cavity on a side close to the carcass 20, and the second cushion rubber 70 is filled in the first cavity on a side close to the belt layer structure 30, the first cushion rubber 40 is fixedly connected to the carcass 20, and the second cushion rubber 70 is fixedly connected to the belt layer structure 30.
[0033] In some embodiments, a second cavity is formed between the belt structure 30, the first cushion rubber 40 and the tread crown 50, the second cavity is located inside the first cavity, and the second cavity is filled with a second cushion rubber 70. That is, the second cushion rubber 70 is fixedly connected to the belt structure 30, the first cushion rubber 40 and the tread crown 50 respectively.
[0034] Therefore, in the all-steel radial tire of the present invention, the shoulder cushion rubber composite formed by the first cushion rubber 40 and the second cushion rubber 70 can improve the shoulder stress of the crown 50 of the all-steel radial tire of the present invention, improve the shoulder rigidity of the crown 50, and avoid the problems of groove cracks, shoulder cracks, and exposed wires.
[0035] It should be noted that the belt ply, also known as the support layer or hard buffer layer or stabilization layer, refers to the material layer of the carcass 20 under the tread base of the radial tire and along the circumferential direction of the tread centerline. The belt ply structure 30 has the functions of buffering, impacting and tightening the carcass 20. As the main load-bearing component of the all-steel radial tire of the present invention, the belt ply structure 30 can effectively improve the durability of the all-steel radial tire and effectively prevent puncture.
[0036] In some embodiments, the belt structure 30 includes a first belt layer 31 and a second belt layer 32. The first belt layer 31 is arranged on the outside of the carcass 2, and the first belt layer 31 is used to transition the carcass 20 to the belt structure 30; the second belt layer 32 is arranged on the outside of the first belt layer 31, and the first belt layer 31 is used to tighten the carcass 20. The first belt layer 31, the second belt layer 32, the tread 50, and the first cushion rubber 40 enclose the above-mentioned second cavity, and the first cavity is used to accommodate the second cushion rubber 70. In addition, along the side of the tread 50 pointing to the sidewall 60, the second belt layer 32 protrudes from the first belt layer 31.
[0037] In some of the embodiments, the belt layer structure 30 also includes a third belt layer 33, which is arranged on the outside of the second belt layer 32, and the crown is above the third belt layer 33. The second belt layer 32 is mainly a working layer, and the third belt layer 33 mainly plays a protective role. The third belt layer 33 is used to protect the second belt layer 32.
[0038] In the above embodiment, the belt structure 30 is provided with three layers, all of which are made of high modulus steel wire with rubber, and the belt structure 30 is arranged differently, and each layer of the belt structure 30 has a difference.
[0039] In some embodiments, the second cushion rubber 70 includes a first area 71, a second area 72 and a third area 73 connected in sequence, and the first area 71, the second area 72 and the third area 73 are connected to form an integral structure. The first area 71 is arranged between the partial outer side of the first cushion rubber 40 and the inner side of the end of the first belt layer 31. The second area 72 is arranged between the partial outer side of the first cushion rubber 40 and the inner side of the end of the second belt layer 32. The third area 73 is arranged between the partial outer side of the first cushion rubber 40 and the partial inner side of the crown 50. Along the first direction A where the carcass 20, the belt layer structure 30 and the crown 50 are arranged, the first area 71 is located between the first cushion rubber 40 and the first belt layer 31, the second area 72 is located between the first cushion rubber 40 and the second belt layer 32, and the third area 73 is located between the first cushion rubber 40 and the crown 50.
[0040] In some embodiments, the side of the second cushion rubber 70 facing the first cushion rubber 40 is attached to the outer side of the end of the first cushion rubber 40, and the side of the second cushion rubber 70 facing away from the first cushion rubber 40 includes a first attaching surface 711, a second attaching surface 721 and a third attaching surface 731 connected in sequence. The first attaching surface 711 is attached to the inner side of the end of the first belt layer 31, the second attaching surface 721 is attached to the inner side of the end of the second belt layer 32, and the third attaching surface 731 is attached to the inner side of the crown 50.
[0041] In some of the embodiments, along the first direction A where the carcass 20, the belt structure 30, and the crown 50 are arranged, the second cushion rubber 70 partially covers the first cushion rubber 40, and the first zone 71 has a first thickness H1, the second zone 72 has a second thickness H2, and the third zone 73 has a third thickness H3; wherein, along the second direction B from the crown 5 to the sidewall 6, the first thickness H1 gradually increases, and the third thickness H3 gradually decreases.
[0042] In some embodiments, a first angle α is formed between the first bonding surface 711 and the second bonding surface 721, and a second angle β is formed between the second bonding surface 721 and the third bonding surface 731; wherein the first angle α is in the range of 0 to 180°, and the second angle β is in the range of 0 to 180°. That is, the connection part between the first cushion rubber 40 and the second cushion rubber 70 is designed with a slope that matches the shape and angle of the belt structure 30, the crown 50, etc.
[0043] It needs to be further explained that the first area 71 is fixedly connected to the first cushion rubber 40 and the first belt layer 31 respectively. The first area 71 is used to provide buffer support for the first belt layer 31, prevent stress concentration or bending damage on the inner side of the end of the first belt layer 31, and maintain the flatness of the first belt layer 31. The second area 72 is fixedly connected to the first cushion rubber 40 and the inner side of the second belt layer 32 respectively. The second area 72 can prevent stress concentration or bending damage on the inner side of the end of the second belt layer 32, the end of the first belt layer 31, and the connection between the first belt layer 31 and the second belt layer 32. The third area 73 is fixedly connected to the first cushion rubber 40 and the crown 50 respectively. The third area 73 can effectively improve the connectivity between the first cushion rubber 40, the second belt layer 32 and the crown 50. Combined with the first cushion rubber 40 and the second cushion rubber 70 at the shoulder position, the integrity between different layers such as the tire body 20, the first cushion rubber 40, the second cushion rubber 70, the first belt layer 31, the second belt layer 32 and the crown 50 is improved, the integrated load-bearing capacity is ensured, and the anti-cracking ability of the shoulder position is improved.
[0044] In some embodiments, the second adhesive pad 70 is a molded adhesive or a film.
[0045] By setting the first area 71 inside the end of the first belt layer 31, and the first bonding surface 711 is bonded to the inside of the end of the first belt layer 31, the second gasket 70 uses a rubber or a film, which can improve the bending performance between the end points of the belt layer structure 30, thereby preventing the bending damage between the end points of the belt layer structure 30 and achieving the anti-deformation ability of the shoulder part. The second gasket 70, i.e., the buffer rubber, at the edge of the belt layer structure 30 between the crown 50 and the first gasket 40 reduces the bending damage of the edge of the belt layer structure 30 under high-load and multi-curve road conditions or the internal cracking under high load, and can enhance its anti-puncture ability and reduce the puncture damage of the belt layer structure 30 by hard objects.
[0046] In some embodiments, the second cushion rubber 70 includes a first-formulated rubber, the first cushion rubber 40 includes a second-formulated rubber, and the first-formulated rubber is the same or similar to the second-formulated rubber. That is, the second cushion rubber 70 and the belt structure 30 are composed of the same or similar-formulated rubber. By setting the second cushion rubber 70 and the belt structure 30 to have the same or similar rubber composition formula, the second cushion rubber 70 has better continuous stability in supporting and buffering the inner side of the end of the belt structure 30.
[0047] The shoulder pad composite is applied to the all-steel radial tire, and the strain energy extreme values of the first zone 71, the second zone 72 and the third zone 73 can be obtained through finite element simulation analysis, respectively. By controlling the strain energy of the first zone 71, the second zone 72 and the third zone 73 within the strain energy extreme value range, the design of the shoulder pad composite can improve the shoulder position and effectively prevent stress concentration on the shoulder.
[0048] The shoulder rubber composite is connected to the crown 50, the tire body 20 and the belt structure 30 at the shoulder of the all-steel radial tire, which is beneficial to the natural and smooth transition of the shoulder from the belt structure 30 with the highest strength and bearing capacity to the sidewall 60 with the weakest strength and bearing capacity, effectively preventing stress concentration in the shoulder, reducing heat generation in the shoulder part, and solving various quality problems of the all-steel radial tire such as crown delamination and shoulder hollowness.
[0049] Therefore, the all-steel radial tire of the present invention includes: a belt layer structure 30, a first cushion rubber 40, and a second cushion rubber 70; the belt layer structure 30 is arranged between the outer side of the carcass 20 and the inner side of the crown 50, and the sidewalls 60 are arranged on both sides of the crown 50. The crown 50, the sidewalls 60, the carcass 20 and the belt layer structure 30 are connected in sequence and enclosed to form a first cavity; the first cushion rubber 40 is arranged in the first cavity, one side of which is adhered to the carcass 20, and the other side of which is adhered to the crown 50 and the sidewall 60; the second cushion rubber 70 is arranged in the first cavity, one side of which is adhered to the first cushion rubber 40, and the other side of which is adhered to the belt layer structure 30 and the crown 50. By innovatively designing the shoulder component and changing it into a shoulder cushion rubber composite component, the probability of shoulder delamination can be effectively reduced by only adding a layer of second cushion rubber 70 on the basis of the existing shoulder cushion rubber, and the shoulder space of the tire can be improved. Compared with the prior art, the invention improves the traditional all-steel radial tire by changing the design of the all-steel radial tire to provide a second cushion rubber 70 on the first cushion rubber 40, thereby improving the viscosity and stiffness transition between the first cushion rubber 40 and the belt layer structure 30 and reducing the shoulder space.
[0050] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0051] In addition, the terms "above" and "below" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "above" and "below" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0053] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.
Claims
1. An all-steel radial tire, characterized in that: include: A belt structure is arranged between the outer side of the carcass and the inner side of the crown, sidewalls are arranged on both sides of the crown, and the crown, the sidewalls, the carcass and the belt structure are sequentially connected and enclosed to form a first cavity; A first cushion rubber is arranged in the first cavity, with one side being attached to the tire body and the other side being attached to the tire crown and the tire sidewall; The second cushion rubber is arranged in the first cavity, with one side thereof being adhered to the first cushion rubber and the other side thereof being adhered to the belt layer structure and the tread crown.
2. The all-steel radial tire according to claim 1, characterized in that: The belt structure comprises a first belt layer and a second belt layer, wherein the first belt layer is arranged on the outside of the carcass, and the second belt layer is arranged on the outside of the first belt layer; wherein, The first belt layer, the second belt layer, the tread crown and the first cushion rubber are sequentially connected and enclosed to form a second cavity, and the second cushion rubber is arranged in the second cavity.
3. The all-steel radial tire according to claim 2, characterized in that: The second pad glue includes a first area, a second area and a third area connected in sequence; wherein, The first area is arranged between the outer side of the first cushion rubber and the inner side of the end of the first belt layer; The second area is arranged between the outer side of the first cushion rubber and the inner side of the end of the second belt layer; The third area is arranged between the outer side of the first cushion rubber and the inner side of the tread crown.
4. The all-steel radial tire according to claim 3, characterized in that: The side of the second pad rubber facing away from the first pad rubber includes a first bonding surface, a second bonding surface and a third bonding surface connected in sequence; wherein, The first bonding surface is bonded to the inner side of the end of the first belt layer, the second bonding surface is bonded to the inner side of the end of the second belt layer, and the third bonding surface is bonded to the inner side of the crown.
5. The all-steel radial tire according to claim 1, characterized in that: The second cushion rubber is a shaped rubber or a film.
6. The all-steel radial tire according to claim 3, characterized in that: Along a first direction A in which the carcass, the belt structure, and the tread crown are arranged, the second cushion rubber partially covers the first cushion rubber.
7. The all-steel radial tire according to claim 6, characterized in that: Along the first direction A, the first region has a first thickness H1, the second region has a second thickness H2, and the third region has a third thickness H3; wherein, Along a second direction B directed from the crown to the sidewall, the first thickness H1 gradually increases, and the third thickness H3 gradually decreases.
8. The all-steel radial tire according to claim 4, characterized in that: A first angle α is formed between the first bonding surface and the second bonding surface; wherein the first angle α is in the range of 0 to 180°.
9. The all-steel radial tire according to claim 4, characterized in that: A second angle β is formed between the second bonding surface and the third bonding surface; wherein the second angle β is in the range of 0 to 180°.
10. The all-steel radial tire according to claim 1, characterized in that: The second cushion rubber includes a first-formulated rubber material, and the belt layer structure includes a second-formulated rubber material, and the first-formulated rubber material is the same as or similar to the second-formulated rubber material.