阅读说明：本技术 一种全钢载重子午线轮胎 (All-steel load-carrying radial tire ) 是由 吴学斌 宋喜政 安超 于 2021-09-09 设计创作，主要内容包括：本发明涉及一种全钢载重子午线轮胎,该轮胎的带束层结构由4层钢丝帘布组成,第一层钢丝帘布层贴排列在胎体上,其与轮胎胎面中心线之间的夹角为52±1°,第二层钢丝帘布层贴排列在第一层钢丝帘布上,其与轮胎胎面中心线之间的夹角为15°±1°,第三层钢丝帘布层贴排列在第二层钢丝帘布上,其与轮胎胎面中心线之间的夹角为15°±1°,第四层钢丝帘布层贴排列在第三层钢丝帘布上,其与轮胎胎面中心线之间的夹角为18°±1°。与现有技术相比,本发明结构可以有效缓解轮胎重载状态下长期曲饶变形后造成轮胎的形变,而带来的轮胎生热大产生的肩空和冠空等病象。(The invention relates to an all-steel truck radial tire, the belt structure of the tire is composed of 4 layers of wirecord fabric, the first layer of wirecord fabric is attached and arranged on the tire body, the included angle between the wirecord fabric and the center line of the tire tread is 52 +/-1 degrees, the second layer of wirecord fabric is attached and arranged on the first layer of wirecord fabric, the included angle between the wirecord fabric and the center line of the tire tread is 15 +/-1 degrees, the third layer of wirecord fabric is attached and arranged on the second layer of wirecord fabric, the included angle between the wirecord fabric and the center line of the tire tread is 15 +/-1 degrees, the fourth layer of wirecord fabric is attached and arranged on the third layer of wirecord fabric, and the included angle between the wirecord fabric and the center line of the tire tread is 18 +/-1 degrees. Compared with the prior art, the structure of the invention can effectively relieve the deformation of the tire caused by long-term bending deformation under the heavy load state of the tire, and the symptoms of shoulder hollows, crown hollows and the like caused by large tire heat generation.)

1. An all-steel load radial tire is characterized in that a belt ply structure of the tire consists of 4 layers of wirecord fabric, a first layer of wirecord fabric is attached and arranged on a tire body, the included angle between the first layer of wirecord fabric and the central line of the tire tread of the tire is 52 +/-1 degrees, a second layer of wirecord fabric is attached and arranged on the first layer of wirecord fabric, the included angle between the second layer of wirecord fabric and the central line of the tire tread of the tire is 15 +/-1 degrees, a third layer of wirecord fabric is attached and arranged on the second layer of wirecord fabric, the included angle between the third layer of wirecord fabric and the central line of the tire tread of the tire is 15 +/-1 degrees, a fourth layer of wirecord fabric is attached and arranged on the third layer of wirecord fabric, and the included angle between the fourth layer of wirecord fabric and the central line of the tire tread of the tire is 18 +/-1 degrees.

2. The all-steel heavy duty radial tire of claim 1, wherein the first layer of wire cord fabric and the second layer of wire cord fabric are arranged in the same direction with the included angle between the centerline of the tire tread.

3. The all-steel heavy-duty radial tire according to claim 1, wherein the included angles between the fourth layer of wire-cord fabric and the tire tread centerline are arranged in the same direction, and are opposite to the included angles between the first layer of wire-cord fabric and the tire tread centerline.

4. The all-steel heavy duty radial tire according to claim 1, wherein the included angles between the second layer of wire cord fabric and the third layer of wire cord fabric and the center line of the tire tread are set in opposite directions, and the angles are both 15 ° ± 1 °.

5. The all-steel heavy duty radial tire according to any one of claims 1 to 4, wherein 3+8 × 0.33HT high strength cords are used for the second layer of steel cord fabric and the third layer of steel cord fabric, the density is 50/100 mm, the thickness is 2.4mm, and the width is 200 mm.

6. The all-steel heavy duty radial tire according to any one of claims 1 to 4, wherein said first layer of wire cords are wire cords with ultra high strength of 3 x 0.20+6 x 0.35HT and the density is 55 wires/100 mm wires.

7. The all-steel heavy duty radial tire according to any one of claims 1 to 4, wherein said fourth layer of wire cords are 3 x 4 x 0.22HE wire cords, and the high tensile density is 40 per 100mm of wires.

8. The all-steel heavy duty radial tire of claim 1, wherein the tread is disposed on the outer side of the fourth layer of wire fabric, and the carcass is disposed on the inner side of the first layer of wire fabric.

Technical Field

The invention relates to an all-steel truck radial Tire (TBR), in particular to an application of a novel structure (the angle of a 2# belted layer and a 3# belted layer is 15 degrees +/-1 degree) in a TBR tire.

Background

All-steel heavy duty radial Tires (TBR), 70% of the load is borne by the belts, especially the middle working ply cords.

The belt layer (belt ply) refers to a material layer that grips the carcass in the circumferential direction of the tread center line under the tread base of the radial tire. The cord fabric is composed of cord fabric which is made of high-strength, high-modulus and small-angle arranged cord fabric as reinforcing material and is covered with sizing material with high definite elongation and high hardness.

At present, the traditional belt ply structure mainly adopts 4 layers of steel wire rubber-coated cord fabric, and each layer of steel wire cord fabric is crosswise attached together by adopting a small angle and different arrangement directions.

Patent application CN202110152820.2 discloses an all-steel load radial tire, the belted layer structure of this novel structure comprises 5 layers of wire cord fabric, first layer wire cord fabric layer pastes and arranges on the matrix, its and tire tread central line between the contained angle be 23 + -1, second layer wire cord fabric layer pastes and arranges on first layer wire cord fabric, its and tire tread central line between the contained angle be 17 + -1, third layer wire cord fabric and fourth layer wire cord fabric adopt and tire tread central line between the contained angle be 0 mode circumference in proper order the layer paste arrange on second layer wire cord fabric, fifth layer wire cord fabric layer pastes and arranges on fourth layer 0 degree wire cord fabric, its and tire tread central line between the contained angle be 40 + -1. Compared with the prior art, the structure of the invention can effectively relieve the deformation of the tire caused by long-term bending deformation under the heavy load state of the tire, and the symptoms of shoulder hollows, crown hollows and the like caused by large tire heat generation.

However, the above patent is used for off-highway all-steel radial tires for heavy-duty construction machinery (OTR), mainly used for mining machinery load-carrying vehicles with severe working conditions, and requires strong bearing capacity, puncture resistance, cutting resistance and low heat generation, the currently used belt structure has insufficient puncture resistance (tire burst phenomenon), and the tires have large profile deformation before and after use (large air pressure and high load), so that the heat generation is high and the service cycle of the tires is short. Patent CN202110152820.2 is special for the OTR design, is applicable to under bad road surface, the high load overload environment, consequently, the belted layer number of piles that adopts is many, and forming process is complicated, and is with high costs, and life's requirement is far less than the TBR tire moreover.

Patent CN201420487699.4 discloses a light-duty load radial tire of all steel, including tread portion, sidewall, bead portion, ply, belted layer, its characterized in that: the belt ply comprises a 1# belt ply, a 2# belt ply, a 3# belt ply and a 4# belt ply, the belt ply adopts a variable angle design, the 4# belt ply is narrow in width, and one belt ply and one tackifying and reinforcing rubber sheet are used. The utility model discloses a claim its tire life extension 1 ~ 3 times, tire rolling resistance reduces 28% (green tire) and economizes on fuel 6% -6.5%, improves by a wide margin at harsh rocky environment puncture resistance, and when filling in the sea engineering operation, the crown puncture resistance can be fine, punctures badly, punctures and explodes and reduces. However, the included angle between the cord of the No. 1 belt layer and the central line of the crown surface is 22 degrees, the included angle between the cord of the No. 2 belt layer and the central line of the crown surface is 27 degrees, the included angle between the cord of the No. 3 belt layer and the central line of the crown surface is 20 degrees, the included angle between the cord of the No. 4 belt layer and the central line of the crown surface is 16 degrees, and the included angle between the cord of the No. 5 belt layer and the central line of the crown surface is 15 degrees. However, although the angle of the cord fabric of the belt ply is changed, the angle of the inflated tire tends to change towards the direction of 0 degree of the central line of the tire surface along with the increase of pressure, so that shoulder space or crown space is caused by deformation and large heat generation at the later stage of the use of the tire.

Disclosure of Invention

The invention aims to overcome the deformation defects before and after use in the prior art, and provides a novel belt structure for a radial tire, which can effectively relieve the phenomena of shoulder hollows, crown hollows and the like caused by large tire heat generation due to the deformation of the tire caused by long-term bending deformation of the tire under a heavy load state.

The purpose of the invention can be realized by the following technical scheme: an all-steel radial truck tire with a novel structure (a structure with an angle of 15 degrees +/-1 degree of a 2# or 3# belt ply), wherein the belt ply structure of the tire consists of 4 layers of wire cord fabrics, the first layer of wire cord fabric is attached and arranged on a tire body, the included angle between the first layer of wire cord fabric and the central line of the tire tread is 52 +/-1 degrees, the second layer of wire cord fabric is attached and arranged on the first layer of wire cord fabric, the included angle between the second layer of wire cord fabric and the central line of the tire tread is 15 degrees +/-1 degrees, the third layer of wire cord fabric is attached and arranged on the second layer of wire cord fabric, the included angle between the third layer of wire cord fabric and the central line of the tire tread is 15 degrees +/-1 degrees, and the fourth layer of wire cord fabric is attached and arranged on the third layer of wire cord fabric, and the included angle between the fourth layer of wire cord fabric and the central line of the tire tread is 18 degrees +/-1 degrees.

The included angle between the first layer of steel wire cord fabric and the tire tread central line is set in the same direction, namely the included angle between the first layer of steel wire cord fabric and the tire tread central line is 52 +/-1 degrees from left to right, and the included angle between the second layer of steel wire cord fabric and the tire tread central line is 15 +/-1 degrees from left to right.

The included angles between the central lines of the second layer of steel wire cord fabric and the third layer of steel wire cord fabric and the tire tread are set in opposite directions, the included angles are all 15 degrees +/-1 degrees, the main bearing effect is achieved, the reinforced material is high-strength, high-modulus and small-angle arranged cord fabric, and the cord fabric is formed by covering high-strength, high-modulus and high-hardness rubber compound composite cord fabric.

The included angles between the fourth layer of steel wire cord fabric and the central line of the tire tread of the tire are arranged in opposite directions, namely the included angle between the fourth layer of steel wire cord fabric and the central line of the tire tread of the tire is 18 degrees +/-1 degree from right to left.

The second layer of steel wire cord fabric and the third layer of steel wire cord fabric are 3+8 × 0.33HT high-strength cords, the density is 50/100 mm, the thickness is 2.4mm, and the width is 200 mm.

The first layer of the steel wire curtain cloth adopts steel wire curtain wires with ultrahigh strength of 3X 0.20+ 6X 0.35HT, and the density is 55 steel wires/100 mm steel wires.

The fourth layer of the steel wire curtain cloth adopts 3X 4X 0.22HE steel wire curtain cloth with high stretching density of 40 steel wires/100 mm steel wires.

The outer side of the fourth layer of the steel wire cord fabric is provided with a tread, and the inner side of the first layer of the steel wire cord fabric is provided with a tire body.

Compared with the prior art, the invention has the following advantages:

1. the belt structure adopted by the application consists of 4 layers, the load is borne by the second layer of wirecord fabric and the third layer of wirecord fabric, the first layer of wirecord fabric adopts a large angle to play a transition role, and the fourth layer of wirecord fabric plays a role in protecting a working layer; compared with the traditional structure, the product with the new structure has the following advantages: the deformation rate of the outer diameter of the durable tire is reduced by 50%, the endurance time is improved by 3%, the temperature of the tire tread is reduced by 5%, the wear resistance is improved by 10%, the bearing capacity is improved by 10%, and the puncture resistance is improved by more than 15%.

2. The second layer and the third layer of wirecord fabric are circumferentially arranged (an included angle between the second layer and the central line of the tire tread) by adopting a 15-degree mode for 2 layers, the angle change does not occur after the tire is inflated, the phenomena of shoulder vacancy, crown vacancy and the like caused by large tire heat generation caused by the deformation of the tire after long-term bending deformation under a heavy-load state can be effectively relieved, and meanwhile, the product is used in a low-speed and severe environment, and the phenomena of shoulder vacancy and delamination caused by high heat generation are avoided. Although the traditional product changes the cord angle of the belt ply, the angle of the inflated tire changes towards the direction of 0 degree of the central line of the tire surface along with the increase of the pressure, so that the shoulder space or the crown space is caused to generate heat due to deformation in the later period of the use of the tire.

3. The invention can effectively resist the damage of external sharp objects to the crown part of the tire, improve the puncture resistance of the tire, reduce the problem of delamination caused by heat generation, greatly improve the service cycle of the tire and meet the use requirements of vehicles.

4. The belt structure of the invention does not need to be provided with an enhanced film and the like, thereby saving raw materials and process procedures and reducing the cost.

5. The invention relates to a TBR tire, which has the following special properties: 1. the wear resistance is excellent, the mark rectangle rate is improved, and the wear resistance is improved; 2. the durability is improved, the deformation of the crown is reduced, the heat generation is reduced, and the durability is improved.

6. The invention relates to a TBR (tunnel boring machine) heavy duty radial tire, which comprises four belted layers, wherein the number of layers of a 1# belted layer is 52 degrees, the angle of a 2# belted layer is 15 degrees, the angle of a 3# belted layer is 15 degrees, the angle of a 4# belted layer is 18 degrees, and the directions of the four belted layers are as follows: the ' v '/' v ' \\\ ' is suitable for long-time operation on good road surfaces under standard load.

Drawings

FIG. 1 is a semi-sectional view of a tire of the present invention employing the belt structure of the present invention.

1-first layer of wirecord fabric, 2-second layer of wirecord fabric, 3-third layer of wirecord fabric, 4-fourth layer of wirecord fabric, 0-tire body and 5-tire surface.

Detailed Description

The invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, providing an all-steel truck radial tire of novel construction, it being understood that persons skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

In the description of the invention, it should be noted that the invention is mainly designed for all-steel heavy duty radial Tires (TBR), and the belt structure of the existing TBR tire mainly adopts 4 layers of steel wire rubber-coated cord fabric, each layer of steel wire cord fabric adopts small angle and different arrangement directions to be crossed and attached together, the tire is deformed after long-term bending deformation under heavy load condition, and the phenomena of shoulder vacancy, crown vacancy and the like caused by large tire heat generation are brought about.

Example 1

As shown in figure 1, the all-steel heavy-duty radial tire with a novel structure (adopting a 2#, 3# belted layer 15-degree angle structure) comprises a tire body 0, a tire tread 5 and a belted layer arranged between the tire body 0 and the tire tread 5, wherein the belted layer structure consists of 4 layers of steel wire cord fabrics, a first layer of steel wire cord fabric 1 is arranged on the tire body 0, and the included angle between the first layer of steel wire cord fabric 1 and the tire tread central line is 52 degrees (namely, the included angle between the first layer of steel wire cord fabric 1 and the tire tread central line is 52 degrees counted from left to right), a second layer of steel wire cord fabric 2 is arranged on the first layer of steel wire cord fabric 1, and the included angle between the second layer of steel wire cord fabric 2 and the tire tread central line is 15 degrees (the included angle between the second layer of steel wire cord fabric 2 and the tire tread central line is 15 degrees counted from left to right), a third layer of steel wire cord fabric 3 is arranged on the second layer of steel wire cord fabric 2 and the tire tread central line is 15 degrees, the fourth layer of wirecord fabric 4 is arranged on the third layer of wirecord fabric 3, and the included angle between the fourth layer of wirecord fabric and the center line of the tire tread is 18 degrees.

The second layer of steel wire cord fabric and the third layer of steel wire cord fabric are 3+8 × 0.33HT high-strength cords, the density is 50/100 mm, the thickness is 2.4mm, and the width is 200 mm.

The first layer of the steel wire curtain cloth adopts steel wire curtain wires with ultrahigh strength of 3X 0.20+ 6X 0.35HT, and the density is 55 steel wires/100 mm steel wires.

The fourth layer of the steel wire curtain cloth adopts 3X 4X 0.22HE steel wire curtain cloth with high stretching density of 40 steel wires/100 mm steel wires.

Carcass and tread applications the art commonly uses carcasses and treads.

The TBR tires from the above examples were compared to conventional TBR tire constructions for performance as shown in the following table:

table 1 comparison of tire test results for conventional construction and example 1 construction

In the comparison table, the change of the diameter of the durable rear inflation rim from 1081.5 to 1093 is much larger than the change of the invention (the invention is changed from 1080.9 to 1086.7) by using the conventional structure, which shows that the tire of the present invention has better deformation resistance than the conventional structure.

The endurance test conditions were: the starting speed is 70km/h, the load of the first stage is 65% for 7h, the load of the second stage is 85% for 16h, the load of the third stage is 100% for 24h, and the speed of the first stage (47h) is unchanged. After 47h the speed increased by 5km/h every 10h and the load increased by 10% until the tyre failed. The ambient temperature is 38 +/-3 degrees, and the tire and rim assembly is parked for 24 hours at the ambient temperature.

The second layer and the third layer of the wirecord fabric of the tire are circumferentially arranged (the included angle between the second layer and the central line of the tire tread of the tire) by adopting a 15-degree mode for 2 layers, the change of the angle of the inflated tire is reduced, the phenomena of shoulder vacancy, crown vacancy and the like caused by large heat generation of the tire due to the deformation of the tire caused by long-term bending deformation under a heavy-load state of the tire can be effectively relieved, and meanwhile, the product is used in a low-speed and severe environment, and the phenomena of shoulder vacancy and delamination caused by high heat generation are avoided.

According to the tire disclosed by the invention, the angles of the 2# belt layer and the 3# belt layer of the tire are reduced, the steel wires of the belt layers are arranged in a circumferential direction, F is Ncos alpha (F is a circumferential component force of the belt layers, N is a breaking force of the steel wires of the belt layers, and alpha is a belt layer angle), the smaller the angle of the belt layers is, the larger the circumferential component force of the belt layers is, the larger the borne impact force is, the more difficult the tire is to be punctured, the damage of an external sharp object to the crown part of the tire can be effectively resisted, the puncture resistance of the tire is improved, the problem of delamination caused by heat generation is reduced, the service cycle of the tire can be greatly improved, and the use requirement of the vehicle is met.

The invention relates to a TBR tire, which has the following special properties: 1. the wear resistance is excellent, the mark rectangle rate is improved, and the wear resistance is improved; 2. the durability is improved, the deformation of the crown is reduced, the heat generation is reduced, and the durability is improved.