阅读说明：本技术 一种轮胎用内置橡胶支撑体及制作工艺 (Built-in rubber support body for tire and manufacturing process ) 是由 张晓军 李振波 王超 燕山 于 2019-11-08 设计创作，主要内容包括：本发明涉及一种轮胎用内置橡胶支撑体,所述橡胶支撑体为分体结构,包括支撑本体和设置在支撑本体上的环形胎冠；所述支撑本体底部采用2-6层、直径1～3mm粗纤维帘线单根接近0度周向缠绕作为骨架；所述环形胎冠采用1-3层、细纤维帘布周向缠绕作为骨架,层与层之间帘线相互交叉或单根接近0度周向缠绕,层之间设有一层胶片。本发明的有益效果是轮胎失压时,保证轮胎高负载性能、避免轮胎内置支撑体与轮胎表面强烈摩擦。(The invention relates to a built-in rubber support body for a tire, which is of a split structure and comprises a support body and an annular tire crown arranged on the support body; 2-6 layers of thick fiber cord threads with the diameter of 1-3mm are wound at the bottom of the support body in the circumferential direction with the single fiber cord thread being close to 0 degree to form a framework; the annular crown is formed by winding 1-3 layers of fine fiber cord fabric in the circumferential direction to form a framework, the cord fabrics between the layers are mutually crossed or are wound in the circumferential direction with the single cord fabric being close to 0 degree, and a layer of rubber sheet is arranged between the layers. The invention has the advantages that when the tire is in pressure loss, the high load performance of the tire is ensured, and the strong friction between the built-in support body of the tire and the surface of the tire is avoided.)

1. A built-in rubber support body for a tire, characterized in that: the rubber support body is of a split structure and comprises a support body and an annular tire crown arranged on the support body; 2-6 layers of thick fiber cord threads with the diameter of 1-3mm are wound at the bottom of the support body in the circumferential direction with the single fiber cord thread being close to 0 degree to form a framework; the annular crown is formed by winding 1-3 layers of fine fiber cord fabric in the circumferential direction to form a framework, the cord fabrics between the layers are mutually crossed or are wound in the circumferential direction with the single cord fabric being close to 0 degree, and a layer of rubber sheet is arranged between the layers.

2. The internal rubber support for a tire according to claim 1, wherein: the base combining curve of the supporting body corresponds to the curve of the combining position of the corresponding steel ring, the diameter of the base combining curve is 4-12mm smaller than that of the corresponding steel ring, and the supporting body is in interference fit with the steel ring.

3. The internal rubber support for a tire according to claim 1, wherein: support body top circumference and be equipped with several arc draw-in grooves, be equipped with the arc fixed block on the annular child hat, support body and annular child hat and pass through arc draw-in groove and the matching of arc fixed block, but the two circumference slides.

4. The internal rubber support for a tire according to claim 1, wherein: the support body adopts an inverted T-shaped structure, the Shore A hardness of a rubber material of the support body is 65-80 degrees, and the tensile strength is more than or equal to 18 MPa.

5. The internal rubber support for a tire according to claim 3, wherein: the width of the arc-shaped fixing block is 0.5mm smaller than that of the arc-shaped clamping groove, and the outer diameter of the arc-shaped fixing block is 1mm larger than that of the arc-shaped clamping groove; the top edge of the supporting body and the lower edge of the annular crown are provided with wedge-shaped openings.

6. A manufacturing process of a built-in rubber support body for a tire is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

step 1, preparing rubber sheets of a support body and an annular crown;

step 2, preparing fiber cords and cord fabrics;

step 3, manufacturing a supporting body tire blank and an annular tire crown tire blank;

3.1 pasting a layer of base matrix rubber sheet on the upper layer of the forming drum;

3.2, winding a fiber cord on the base carcass film at a single circumferential direction close to 0 degree, wherein the wire distance is 3.5-6 mm;

3.3 repeating the steps 3.1 and 3.2, and compacting layer by layer;

3.4 pasting a tire body rubber sheet on the upper layer of the base rubber sheet, compacting layer by layer to prepare a supporting body tire blank;

3.5 pasting a layer of tire crown rubber sheet on the upper layer of the forming drum;

3.6 pasting 1 layer of fine fiber cord fabric on the upper layer of the tire crown rubber sheet, pasting one layer of rubber sheet on the upper layer, repeating the operation, and enabling the cords between the layers to be crossed, wherein the number of the cord fabric layers is 1-3, or 1-3 layers of cord fabric layers are wound in the circumferential direction with the single cord fabric approaching 0 degree;

3.7 pasting a layer of tire crown rubber sheet on the fiber cord fabric, compacting layer by layer to prepare an annular tire crown blank;

step 4, vulcanizing the tire blanks, namely respectively filling the two molded tire blanks into respective vulcanizing molds for vulcanization to obtain a support body and an annular tire crown;

and 5, brushing powdery lubricant on the arc-shaped clamping grooves of the support body and the arc-shaped fixing blocks of the annular tire crowns in the circumferential direction, and combining the support body and the annular tire crowns into a whole to obtain the built-in rubber support.

7. The process for manufacturing a built-in rubber support body for a tire according to claim 6, wherein: in the step 1, the width of the rubber sheet of the annular crown is equal to the width of a running surface of the annular crown +/-5-10 mm; the width of the base film of the supporting body is equal to +/-5-10 mm of the base width; the width of the carcass rubber sheet of the support body is equal to +/-5-10 mm of the width of the carcass; the thicknesses of the rubber sheets of the supporting body and the annular tire crown are both 8-15 mm.

8. The process for manufacturing a built-in rubber support body for a tire according to claim 6, wherein: in the step 2, the fiber cord is made of polyester and nylon dipped with glue, and the thickness of the single fiber cord is 1-3 mm; the fiber cord fabric is made of polyester and nylon coated with glue, and the thickness of the cord of the fiber cord fabric is less than 1 mm.

Technical Field

The invention belongs to the technical field of inner supporting bodies for tires, and particularly relates to a built-in rubber supporting body for a tire with high load performance and low friction and a manufacturing process thereof.

Background

The tire is only important for the safe running of the vehicle, the vehicle can lose balance after the tire is suddenly punctured by a sharp object in the running process to leak air or explode, particularly, the vehicle cannot be stopped immediately when running at high speed, the vehicle is very dangerous after deviating from the running direction, the vehicle is not controlled, and the vehicle can collide with nearby vehicles or objects to cause safety accidents.

In order to raise the safety performance of vehicle, a safety device called as support body is preinstalled in the tyre of tyre, when the tyre is in the absence of air and pressure, the support body can be used for bearing load of vehicle, maintaining running direction of vehicle and ensuring that the vehicle can be safely driven to nearby repairing station.

The existing support body on the current market mainly has the following two structures: one half of the bonded rubber support, as shown in FIG. 1: the support body is designed into half pieces, the two half pieces of support bodies are combined into a whole rubber support body by adopting the adhesive film, the load capacity of the rubber support body is restrained by the adhesive strength between the two half pieces, the rubber support body is large in size, heavy in weight and high in oil consumption, and even if some middle through holes are adopted, the weight can be reduced, but the bearing capacity can also be reduced. The assembly view of the two half rubber support bodies, the steel ring and the tire is shown in figure 2.

Another type of support body, shown in fig. 3, is a support body of the type that is typically formed by three 1/3 circular ring-shaped support members screwed together to form a circular support frame, which is placed inside the tire to form the support body. The disadvantage is the complex assembly; the connecting screw is easy to loosen, and the supporting function can be lost after the connecting screw is loosened and separated; when the tire is impacted, the tire is easy to break off at the connecting screw, and the supporting function is lost.

When the tire is decompressed, the support body is in contact with the inner surface of the tire, strong friction is generated between the support body and the inner surface of the tire, heat is generated, smoke is generated, and the stability of a vehicle is affected.

Disclosure of Invention

In order to solve the technical problems, the invention provides a built-in rubber support body for a tire, aiming at ensuring the high load performance of the tire and avoiding the strong friction between the built-in support body of the tire and the surface of the tire when the tire is decompressed.

The technical scheme of the invention is as follows:

a built-in rubber support body for a tire is of a split structure and comprises a support body and an annular tire crown arranged on the support body; 2-6 layers of thick fiber cord threads with the diameter of 1-3mm are wound at the bottom of the support body in the circumferential direction with the single fiber cord thread being close to 0 degree to form a framework; the annular crown is formed by winding 1-3 layers of fine fiber cord fabric in the circumferential direction to form a framework, the cord fabrics between the layers are mutually crossed or are wound in the circumferential direction with the single cord fabric being close to 0 degree, and a layer of rubber sheet is arranged between the layers.

Compared with the prior art, the supporting body of the scheme is composed of a supporting body and an annular tire crown, the supporting body and the annular tire crown are respectively of integral design, the circumferential directions are integral, and the supporting body cannot be loosened or separated; this scheme is equipped with the reinforcing design at the base and the annular child hat of supporting the body, guarantees high bearing capacity, and guarantees to combine closely between supporter and the steel ring.

Based on the scheme, the invention also makes the following improvements:

furthermore, the base combining curve of the support body corresponds to the curve of the corresponding steel ring combining position, the diameter of the base combining curve is 4-12mm smaller than that of the corresponding steel ring, and the support body is in interference fit with the steel ring. In the technical improvement, the built-in rubber support body is in interference fit with the steel ring, and the hooping effect of the support body framework is added, so that the built-in rubber support body and the steel ring are tightly combined and cannot slide.

Further, support body top circumference and be equipped with several arc draw-in grooves, the last arc fixed block that is equipped with of annular child hat, but support body and annular child hat pass through arc draw-in groove and arc fixed block matching, but the two circumference slides. In this technological improvement, support body and annular child hat pass through arc draw-in groove and arc fixed block constitution an organic whole, and it is very tight not block promptly between the two, also can not slide when the vehicle normally travels. When the tire is decompressed, the annular tire crown of the support body is in contact with the inner surface of the tire, when the tire is subjected to the inner-tire friction force, circumferential slippage can be generated between the support body and the annular tire crown, the weight of a vehicle can be supported, the friction between the support body and the inner tire of the tire can be eliminated, and the stability of the vehicle is ensured.

Furthermore, the support body adopts an inverted T-shaped structure, the Shore A hardness of a rubber material of the support body is 65-80 degrees, and the tensile strength is more than or equal to 18 MPa. The technical improvement can reduce the weight of the support body and ensure high bearing performance.

Further, the width of the arc-shaped fixing block is 0.5mm smaller than that of the arc-shaped clamping groove, and the outer diameter of the arc-shaped fixing block is 1mm larger than that of the arc-shaped clamping groove; the top edge of the supporting body and the lower edge of the annular crown are provided with wedge-shaped openings. The technical improvement ensures that the arc-shaped fixing block is just matched with the arc-shaped clamping groove, and the design of the wedge-shaped opening is adopted to facilitate installation.

In addition, the invention also provides a manufacturing process of the built-in rubber support body for the tire, which comprises the following steps,

step 1, preparing rubber sheets of a support body and an annular crown;

step 2, preparing fiber cords and cord fabrics;

step 3, manufacturing a supporting body tire blank and an annular tire crown tire blank;

3.1 pasting a layer of base matrix rubber sheet on the upper layer of the forming drum;

3.2, winding a fiber cord on the base carcass film at a single circumferential direction close to 0 degree, wherein the wire distance is 3.5-6 mm;

3.3 repeating the steps 3.1 and 3.2, and compacting layer by layer;

3.4 pasting a tire body rubber sheet on the upper layer of the base rubber sheet, compacting layer by layer to prepare a supporting body tire blank;

3.5 pasting a layer of tire crown rubber sheet on the upper layer of the forming drum;

3.6 pasting 1 layer of fine fiber cord fabric on the upper layer of the tire crown rubber sheet, pasting one layer of rubber sheet on the upper layer, repeating the operation, and enabling the cords between the layers to be crossed, wherein the number of the cord fabric layers is 1-3, or 1-3 layers of cord fabric layers are wound in the circumferential direction with the single cord fabric approaching 0 degree;

3.7 pasting a layer of tire crown rubber sheet on the fiber cord fabric, compacting layer by layer to prepare an annular tire crown blank;

step 4, vulcanizing the tire blanks, namely respectively filling the two molded tire blanks into respective vulcanizing molds for vulcanization to obtain a support body and an annular tire crown;

and 5, brushing powdery lubricant on the arc-shaped clamping grooves of the support body and the arc-shaped fixing blocks of the annular tire crowns in the circumferential direction, and combining the support body and the annular tire crowns into a whole to obtain the built-in rubber support.

Further, in the step 1, the width of the rubber sheet of the annular crown is equal to the width of a running surface of the annular crown +/-5-10 mm; the width of the base film of the supporting body is equal to +/-5-10 mm of the base width; the width of the carcass rubber sheet of the support body is equal to +/-5-10 mm of the width of the carcass; the thicknesses of the rubber sheets of the supporting body and the annular tire crown are both 8-15 mm.

Further, in the step 2, the fiber cord is made of polyester and nylon dipped with glue, and the thickness of the single fiber cord is 1-3 mm; the fiber cord fabric is made of polyester and nylon coated with glue, and the thickness of the cord of the fiber cord fabric is less than 1 mm. In the technical improvement, polyester and chinlon with good thermal stability are preferably selected to prepare the fiber cord fabric.

The beneficial effects of the technical scheme are as follows:

1) the support body is designed by adopting a high-strength sizing material formula, no through hole is formed, the load performance is good, the tire body is designed in an inverted T shape, the weight of the support body can be reduced, and the support body still has high bearing performance.

2) When the tire decompression, the contact of support body ring child hat and tire internal surface can produce very strong frictional force, and the ring child hat transmits frictional force to the support body, because the supporting body is not very tight with matching between the ring child hat, has brushed powdered lubricant again simultaneously, and the two can produce circumference and slide, avoids the strong friction between the support body ring child hat and the tire internal surface between the two, has guaranteed the stability of vehicle.

Drawings

FIG. 1 is a cross-sectional view of a prior art two-piece rubber support;

FIG. 2 is a schematic cross-sectional view of a prior art assembly of two rubber support halves;

FIG. 3 is a cross-sectional view of a prior art stent support;

FIG. 4 is an assembly view of the present invention with a built-in rubber support, a rim and a tire

FIG. 5 is a schematic cross-sectional view of the inventive built-in rubber support;

FIG. 6 is a cross-sectional view of a support body according to the present invention;

FIG. 7 is a schematic representation of a toroidal crown of the present invention;

FIG. 8 is a schematic view of the bottom frame of the support body of the present invention being wound;

FIG. 9 is a schematic view of the winding of the toroidal crown carcass of the present invention;

FIG. 10 is a schematic view of the circumferential winding of cords across one another between annular crown layers of the invention.

In the figure, 1, tire; 2. a built-in rubber support body; 3. steel rings; 21. a support body; 22. an annular crown; 23. opening a wedge-shaped opening; 211. an arc-shaped clamping groove; 212. a base binding curve; 213. a base frame; 221. an arc-shaped fixed block; 222. a crown frame.

Detailed Description

As shown in fig. 4-7, the internal rubber support 2 for the tire is a split structure, and comprises a support body 21 and a circular crown 22 arranged on the support body 21; 2-6 layers of thick fiber cord threads with the diameter of 1-3mm are wound at the bottom of the supporting body 21 in the circumferential direction with the single angle close to 0 ℃ to form a base framework 213; the annular crown 22 adopts 1-3 layers of fine fiber cord fabric circumferentially wound as a crown framework 222, the cord fabrics between the layers are mutually crossed or the single cord fabric is circumferentially wound at a temperature close to 0 degree, and a layer of rubber sheet is arranged between the layers.

The base combining curve 212 of the supporting body 21 corresponds to the curve of the corresponding steel ring combining part, the diameter of the base combining curve is 4-12mm smaller than that of the corresponding steel ring, and the supporting body 21 is in interference fit with the steel ring 3.

A plurality of arc-shaped clamping grooves 211 are circumferentially arranged at the top of the supporting body 21, an arc-shaped fixing block 221 is arranged on the annular crown 22, and the supporting body 21 and the annular crown 22 are matched with each other through the arc-shaped clamping grooves 211 and the arc-shaped fixing block 221; the width of draw-in groove is i +0.5, and the degree of depth g of draw-in groove, g value 5 ~ 15mm, draw-in groove arc radius Ra, draw-in groove external diameter

The width of the fixing block is less than the clamping groove by 0.5mm, the depth of the fixing block is g, and the outer diameter of the fixing blockCan be just matched with the clamping groove; wedge-shaped openings 23 are formed in the top edge of the supporting body and the lower edge of the annular crown.

The support body adopts an inverted T-shaped structure, the Shore A hardness of a rubber material of the support body is 65-80 degrees, and the tensile strength is more than or equal to 18 MPa.

As shown in fig. 8-10, a process for manufacturing a built-in rubber support body for a tire includes the steps of,

step 1, preparing rubber sheets of a support body and an annular crown; wherein, the width of the rubber sheet of the annular crown is equal to the width of the running surface of the annular crown +/-5-10 mm; the width of the base film of the supporting body is equal to +/-5-10 mm of the base width; the width of the carcass rubber sheet of the support body is equal to +/-5-10 mm of the width of the carcass; the thicknesses of the rubber sheets of the supporting body and the annular tire crown are both 8-15 mm.

Step 2, preparing fiber cords and cord fabrics; the fiber cord is made of polyester and nylon which are dipped with glue, and the thickness of the single fiber cord is 1-3 mm; the fiber cord fabric is made of polyester and nylon coated with glue and good in thermal stability, and the thickness of the cord of the fiber cord fabric is smaller than 1 mm.

Step 3, manufacturing a supporting body tire blank and an annular tire crown tire blank;

3.1 pasting a layer of base matrix rubber sheet on the upper layer of the forming drum;

3.2, winding a fiber cord on the base carcass film at a single circumferential direction close to 0 degree, wherein the wire distance is 3.5-6 mm;

3.3 repeating the steps 3.1 and 3.2, and compacting layer by layer;

3.4 pasting a tire body rubber sheet on the upper layer of the base rubber sheet, compacting layer by layer to prepare a supporting body tire blank;

3.5 pasting a layer of tire crown rubber sheet on the upper layer of the forming drum;

3.6 pasting 1 layer of fine fiber cord fabric on the upper layer of the tire crown rubber sheet, pasting one layer of rubber sheet on the upper layer, repeating the operation, and enabling the cords between the layers to be crossed, wherein the number of the cord fabric layers is 1-3, or 1-3 layers of cord fabric layers are wound in the circumferential direction with the single cord fabric approaching 0 degree;

3.7 pasting a layer of tire crown rubber sheet on the fiber cord fabric, compacting layer by layer to prepare an annular tire crown blank;

step 4, vulcanizing the tire blanks, namely respectively filling the two molded tire blanks into respective vulcanizing molds for vulcanization to obtain a support body and an annular tire crown;

and 5, brushing powdery lubricant on the arc-shaped clamping grooves of the support body and the arc-shaped fixing blocks of the annular tire crowns in the circumferential direction, and combining the support body and the annular tire crowns into a whole to obtain the built-in rubber support.