阅读说明：本技术 一种具有仿方竹支撑结构的非充气车轮及加工工艺 (Non-inflatable wheel with imitated square bamboo supporting structure and processing technology ) 是由 邓耀骥 王志越 龚俊杰 沈辉 郑再象 于 2021-08-16 设计创作，主要内容包括：本发明公开了一种具有仿方竹支撑结构的非充气车轮及加工工艺,其车轮从外到内包括：仿方竹支撑体结构、轮毂。进一步的,所述仿方竹支撑体结构沿轮胎径向依次分为胎冠、仿方竹支撑体结构以及胎内圈。本发明设计了″S″形仿方竹结构的方形圆角加肋的薄壁支撑结构,这种结构的支撑体可以起到较好的减振吸能的作用且本身结构稳定在车辆较高速行驶时其振动较小,有利于减少噪音。针对一般非充气轮胎散热差的问题,在基于″三明治″结构的剪切带的基础上设计了增强层-网状剪切层-增强层的改良结构,以加强散热、减小温升。(The invention discloses a non-inflatable wheel with a square bamboo-like supporting structure and a processing technology, wherein the wheel comprises the following components from outside to inside: imitative square bamboo supporter structure, wheel hub. Furthermore, the imitation square bamboo support body structure is sequentially divided into a tire crown, an imitation square bamboo support body structure and an inner tire ring along the radial direction of the tire. The invention designs the thin-wall supporting structure with square round corners and ribs of the S-shaped imitated square bamboo structure, the supporting body of the structure can play a better role in vibration reduction and energy absorption, and the structure is stable, so that the vibration is smaller when a vehicle runs at a higher speed, and the noise is reduced. Aiming at the problem of poor heat dissipation of a common non-pneumatic tire, an improved structure of a reinforced layer-a reticular shear layer-a reinforced layer is designed on the basis of a shear band based on a sandwich structure so as to enhance the heat dissipation and reduce the temperature rise.)

1. A non-pneumatic wheel with an imitation square bamboo supporting structure comprises an imitation square bamboo supporting body structure (1) and a wheel hub (2), wherein the wheel hub (2) is arranged in the imitation square bamboo supporting body structure (1), and is characterized in that the imitation square bamboo supporting body structure (1) is sequentially divided into a wheel crown (1-1), an imitation square bamboo supporting body (1-2) and an inner tyre ring (1-3) along the radial direction of a tyre,

the tire crown (1-1) is in contact with the ground and is divided into a tire tread (1-1-1) and a shear band from the ground contact side of the tire to the inside in sequence, and the shear band is embedded into the tire tread (1-1-1) and is further bonded by an adhesive;

the upper end of the imitated square bamboo support body structure (1) is fixedly combined with the tire crown (1-1), and the lower end of the imitated square bamboo support body structure (1) is fixedly combined with the tire inner ring (1-3);

the imitation square bamboo support bodies (1-2) of the imitation square bamboo support structure (1) are at least three rows and are uniformly distributed according to a circular array, and the left and right intervals between every two imitation square bamboo support bodies (1-2) are 45 degrees, and the upper and lower intervals are 10-12 mm;

the imitation square bamboo support body (1-2) adopts a structure of a middle square bamboo, the cross section of the imitation square bamboo support body (1-2) is in a square annular figure with round corners, a reinforcing rib plate is arranged at the middle point of each side, and the support body is in an S shape as a whole;

the inner side of the inner tire ring (1-3) and the hub (2) are assembled in an interference fit mode and further bonded through an adhesive.

2. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: grooves and patterns are formed in the tread (1-1-1), and the depth of each groove is larger than 8mm and not smaller than 10 mm.

3. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the shear band is composed of two inextensible high shear modulus reinforcement layers (1-1-2) on the inner and outer layers and a low shear modulus reticulated shear layer (1-1-3) in between.

4. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 3, wherein: the material of the tread (1-1-1) is selected from a rubber material with ground rolling resistance, the reinforcing layer (1-1-2) is selected from a non-stretchable composite material, and the reticular shear layer (1-1-3) is selected from a synthetic rubber material with a shear modulus of 3-20 MPa.

5. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the adhesive is an RFL adhesive, and the inner tire ring (1-3) is made of a rubber material.

6. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the height of the imitated square bamboo support body (1-2) is 124mm, the maximum width is 199 mm and 201mm, the arc radius of the S-shaped is 5-6mm, and the arc length of the S-shaped is 334 mm and 336 mm.

7. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the proportion of the imitated square bamboo supporting structure (1) in the whole tire is larger than 1/3 and smaller than 1/2, and the material of the imitated square bamboo supporting structure (1) is polyurethane or a high-performance resin material or a TPE/TPR thermoplastic elastomer material.

8. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the tire crown (1-1) and the tire inner ring (1-3) are manufactured by adopting a casting molding process; the imitation square bamboo support body (1-2) is made by 3D printing.

9. A non-pneumatic wheel having a simulated square bamboo support structure as claimed in claim 1, wherein: the wheel hub (2) comprises a wheel rim (2-1), a spoke (2-2) and a wheel disc (2-3); the surface of the rim (2-1) is provided with a groove for assembling the imitated square bamboo support body (1-2); the hub (2) is made of aluminum alloy and is manufactured by a low-pressure precision casting method.

10. A processing technology of a non-inflatable wheel with a simulated square bamboo supporting structure comprises the following specific steps;

1) the tire crown (1-1) and the tire inner ring (1-3) are cast by a casting molding process;

inputting the polymer raw material into the inner cavity of the machine head by an injection molding machine through a metering pump, directly injecting the mixture into the inner cavity of a mold after mixing, and heating the tire by a core mold to cure the tire;

during injection molding, the whole mold is turned to a vertical position by the power oil cylinder of the turning frame, gas generated in the injection process is exhausted by the exhaust holes, liquid materials overflow from the exhaust holes during material injection, the injection is stopped after the liquid materials overflow for 1 to 2 seconds, and then pressure is applied to the materials in the mold cavity to enable the materials to be combined with the sheared band and the tire inner ring (1-3) in a mutual permeation mode

After the injection is finished, the power oil cylinder is restored to the horizontal position for vulcanization, and then the processing can be finished;

2) the hub (2) is cast by a low-pressure precision casting method;

fixing a mould above a closed high-temperature aluminum solution pool, introducing dry compressed air into the closed solution pool to enable the aluminum solution to enter a cavity in the mould under the gas pressure, and keeping the gas pressure of the aluminum solution pool until a casting is finished;

3) assembling;

embedding the shear band of the tire crown (1-1) into the tire tread (1-1-1) and further bonding the shear band with an adhesive, fixedly combining the upper end of the imitation square bamboo support body structure (1) with the tire crown (1-1), and fixedly combining the lower end of the imitation square bamboo support body structure (1) with the tire inner ring (1-3); and (3) assembling the inner side of the tire inner ring (1-3) and the wheel hub (2) through interference fit and further bonding the inner side of the tire inner ring and the wheel hub by using an adhesive.

Technical Field

The invention belongs to the technical field of non-pneumatic tire design, and particularly relates to a non-pneumatic wheel with a square bamboo-like supporting structure and a processing technology.

Background

The tire is one of important parts of a vehicle, and as the only part contacting with the ground on the automobile, the tire not only needs to support the vehicle, but also needs to buffer the impact and the vibration together with the automobile suspension. Pneumatic tires have been invented for over a hundred years and their technology has matured. However, as the time advances, automobiles gradually enter households, and defects of pneumatic tires are gradually revealed. The current pneumatic tire is sealed by rubber to seal air under pressure, so when the tire is injured by a sharp object, the risk of air leakage and even tire burst is generated, thereby possibly causing great threat to the life and property safety of a driver. As such, non-pneumatic tires are produced at the same time. The non-inflatable structure is adopted, the supporting and buffering effects are realized by utilizing the material and the structure of the tire, so that the inflatable structure is replaced, the advantages that the traditional inflatable tire cannot have such as inflation-free, explosion-proof, safe and durable effects are achieved, the driving safety of a vehicle is improved, the tire is a great trend in tire development, and the tire has a wide market and a good development prospect. However, the conventional non-pneumatic tire has the disadvantages of poor shock absorption, low bearing capacity, high noise, poor heat dissipation effect and the like due to the limitation of the supporting structure, and needs to be further researched and developed by people.

The thin-wall pipe structure is an excellent energy absorption structure, but the collision resistance, the easy installation and the stability of the traditional square pipes and round pipes need to be improved. The invention uses the structure of square and round section with ribs of square bamboo in nature for reference, enhances the performance of the thin-wall pipe, and improves the thin-wall pipe to be applied to the support body of the non-pneumatic tire. A light and strong-shock-absorbing non-pneumatic tire with an imitation square bamboo supporting structure is designed.

Disclosure of Invention

In view of the above problems, the invention provides a non-inflatable wheel with an imitated square bamboo supporting structure and a processing technology thereof, wherein the square round-corner ribbed thin-wall supporting structure of an S-shaped imitated square bamboo structure is designed, a supporting body of the structure can play a good role in vibration reduction and energy absorption, and the structure is stable, so that the vibration is small when a vehicle runs at a high speed, and the noise is reduced. Aiming at the problem of poor heat dissipation of a common non-pneumatic tire, an improved structure of a reinforced layer-a reticular shear layer-a reinforced layer is designed on the basis of a shear band based on a sandwich structure so as to enhance the heat dissipation and reduce the temperature rise.

The invention provides a non-pneumatic wheel with an imitated square bamboo supporting structure, which comprises an imitated square bamboo supporting body structure and a wheel hub, wherein the wheel hub is arranged in the imitated square bamboo supporting body structure, the imitated square bamboo supporting body structure is sequentially divided into a wheel crown, an imitated square bamboo supporting body and an inner tyre ring along the radial direction of a tyre,

the tire crown is in contact with the ground and is sequentially divided into a tire tread and a shear band from the ground contact side of the tire inwards, and the shear band is embedded into the tire tread and is further bonded by an adhesive;

the upper end of the imitated square bamboo support body structure is fixedly combined with the tire crown, and the lower end of the imitated square bamboo support body structure is fixedly combined with the tire inner ring;

the imitated square bamboo support bodies of the imitated square bamboo support structure are at least three rows and are uniformly distributed according to a circular array, and the left and right spacing and the up and down spacing between every two imitated square bamboo support bodies are respectively 45 mm and 10-12 mm;

the square-bamboo-imitated support body is of a structure of a square bamboo, the cross section of the square-bamboo-imitated support body is of a square annular figure with round corners, a reinforcing rib plate is arranged at the middle point of each side, and the support body is integrally S-shaped;

the inner side of the inner tire ring and the hub are assembled through interference fit and further bonded through an adhesive.

As a further improvement of the tire, the tire tread is provided with grooves and patterns, and the depth of the grooves is more than 8mm and not less than 10mm, so that the effects of draining water and increasing friction are achieved.

As a further improvement of the tire of the present invention, the shear band is comprised of an inner and outer inextensible high shear modulus reinforcement layer and a low shear modulus reticulated shear layer therebetween.

As a further improvement of the tire of the invention, the material of the tire tread is selected from a rubber material with ground rolling resistance, the reinforcing layer is selected from a non-stretchable composite material, and the reticular shear layer is selected from a synthetic rubber material with a shear modulus of 3-20 MPa.

As a further improvement of the tire, the adhesive is an RFL adhesive, and the inner tire ring is made of rubber materials.

As a further improvement of the tire, the height of the imitated square bamboo support body is 122-.

As a further improvement of the tire, the proportion of the imitated square bamboo supporting structure in the whole tire is greater than 1/3 and less than 1/2, and the material of the imitated square bamboo supporting structure is polyurethane or a high-performance resin material or a TPE/TPR thermoplastic elastomer material.

As a further improvement of the tire, the tire crown and the tire inner ring are manufactured by adopting a casting molding process; the imitation square bamboo support body is made by 3D printing.

As a further improvement of the tire of the present invention, the hub includes a rim, a spoke, and a wheel disc; the surface of the rim is provided with a groove for assembling the imitated square bamboo support body; the hub is made of aluminum alloy and is manufactured by a low-pressure precision casting method.

The invention provides a processing technology of a non-inflatable wheel with a pseudo-square bamboo supporting structure, which comprises the following specific steps and is characterized in that;

1) the tire crown (1-1) and the tire inner ring (1-3) are cast by a casting molding process;

inputting the polymer raw material into the inner cavity of the machine head by an injection molding machine through a metering pump, directly injecting the mixture into the inner cavity of a mold after mixing, and heating the tire by a core mold to cure the tire;

during injection molding, the whole mold is turned to a vertical position by the power oil cylinder of the turning frame, gas generated in the injection process is exhausted by the exhaust holes, liquid materials overflow from the exhaust holes during material injection, the injection is stopped after the liquid materials overflow for 1 to 2 seconds, and then pressure is applied to the materials in the mold cavity to enable the materials to be combined with the sheared band and the tire inner ring (1-3) in a mutual permeation mode

After the injection is finished, the power oil cylinder is restored to the horizontal position for vulcanization, and then the processing can be finished;

2) the hub (2) is cast by a low-pressure precision casting method;

fixing a mould above a closed high-temperature aluminum solution pool, introducing dry compressed air into the closed solution pool to enable the aluminum solution to enter a cavity in the mould under the gas pressure, and keeping the gas pressure of the aluminum solution pool until a casting is finished;

3) assembling;

embedding the shear band of the tire crown (1-1) into the tire tread (1-1-1) and further bonding the shear band with an adhesive, fixedly combining the upper end of the imitation square bamboo support body structure (1) with the tire crown (1-1), and fixedly combining the lower end of the imitation square bamboo support body structure (1) with the tire inner ring (1-3); and (3) assembling the inner side of the tire inner ring (1-3) and the wheel hub (2) through interference fit and further bonding the inner side of the tire inner ring and the wheel hub by using an adhesive.

The invention has the advantages that the simulated square bamboo support structure is utilized to replace the inflation pressure of the traditional pneumatic tire, the possibility of tire burst is completely avoided, and the life and property safety of a driver is greatly protected. The S-shaped imitation square bamboo structure has good deformation characteristic and rebound characteristic, and the whole support body keeps low quality and has excellent vibration damping and energy absorbing characteristics and good bearing capacity stability. The stability of the structure also makes the vibration of the imitation square bamboo support structure lower and therefore the noise generated when the vehicle is running at high speed also lower. And the thin-walled structure of the imitation square bamboo structure enables the overall quality of the tire to be lower, and the fuel economy can be improved. The shear band with the sandwich structure can reduce rolling resistance while buffering and damping, and the reticular shear band is favorable for reducing the temperature rise of the tire in the running process of the vehicle.

Drawings

FIG. 1 is a general view of the tire structure of the present invention;

FIG. 2 is a schematic view of the outer wheel of the present invention;

FIG. 3 is a schematic view of a crown of the present invention;

FIG. 4 is a schematic view of a tread of the present invention;

FIG. 5 is a schematic view of a reticulated shear layer of the present invention;

FIG. 6 is a schematic view of an artificial square bamboo support according to the present invention;

FIG. 7 is a partial schematic view of a portion of a tire of the present invention;

FIG. 8 is a schematic view of a hub according to the present invention;

in the figure: 1. imitating a square bamboo support body structure; 1-1. a tire crown; 1-1-1. tread; 1-1-2. a reinforcement layer; 1-1-3. a reticular shear layer; 1-1-4. a reinforcement layer; 1-2, imitating a square bamboo support body; 1-2-1. thin wall ribbed plate structure; 1-2-2. outer wall; 1-2-3. inner wall; 1-3, inner tyre ring; 2. a hub; 2-1, a rim; 2-2. spokes; 2-3, wheel disc.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

the invention provides a non-inflatable wheel with an imitated square bamboo supporting structure and a processing technology, wherein an S-shaped imitated square bamboo structure thin-wall supporting structure with square round corners and ribs is designed, a supporting body of the structure can play a better role in vibration reduction and energy absorption, the structure is stable, the vibration is small when a vehicle runs at a higher speed, and the noise is reduced. Aiming at the problem of poor heat dissipation of a common non-pneumatic tire, an improved structure of a reinforced layer-a reticular shear layer-a reinforced layer is designed on the basis of a shear band based on a sandwich structure so as to enhance the heat dissipation and reduce the temperature rise.

As a specific embodiment of the present invention, the present invention provides a non-pneumatic tire with a pseudo-square bamboo support structure, specifically including a pseudo-square bamboo support structure 1 and a hub 2 as shown in fig. 1.

As shown in fig. 2, the imitation square bamboo support body structure 1 sequentially comprises a tire crown 1-1, an imitation square bamboo support body 1-2 and an inner tire ring 1-3 along the tire grounding side inwards.

As shown in fig. 3, the tire crown 1-1 is in contact with the ground, and the tire tread 1-1-1, the reinforcing layer 1-1-2, the reticular shear layer 1-1-3 and the reinforcing layer 1-1-4 are arranged from the ground contact side of the tire inwards in sequence;

as shown in figure 4, the tread 1-1-1 is 220mm wide, 620mm in diameter and 12-13mm thick, and is provided with grooves and patterns, and the depth of the grooves is more than 7mm and less than 9mm so as to play a role in draining water and increasing friction. The tread pattern adopts mixed pattern, and the mixed pattern can integrate the quick drainage function of longitudinal pattern and the ground holding capacity of transverse pattern, and has higher comprehensive performance. The tread is made of a ground rolling resistance rubber material.

The reinforcing layer 1-1-2; 1-1-3 of a reticular shear layer; 1-1-4 of a reinforcing layer; the thickness of each layer can be selected from 5-10mm according to the application of the tire, and the three-layer structure forms a 'sandwich' shear band, wherein the tensile modulus of the inner layer and the outer layer is far greater than the shear modulus of the shear layer, so that deformation is mainly borne by the shear layer. The thicker the shear band, the greater the resistance of the tire to the shear effect, the less energy is lost during rolling and the less rolling resistance the tire. The shear band can provide uniform ground contact pressure for the tire, thereby solving the problem that the design of the traditional tire is limited due to strong coupling. The net-shaped shear layer can reduce the temperature rise of the tire during the running process of the vehicle.

As shown in fig. 5, the reticulated shear layer is positioned intermediate the inextensible reinforcing layers, has a width of 220mm as the tread, and a thickness determined by the intended use of the tire, preferably 5-10mm, to further determine the diameter. The reticular shear layer consists of 1045 regular hexagonal holes with the side length of 17mm, which are uniformly distributed, the interval between every two hexagons is 5mm, and the staggered intermittent angle is 60 degrees.

The invention is inspired by square bamboo, which is a plant with good toughness and elasticity in nature, and the structure of the invention is composed of hollow stalks surrounded by inner and outer walls, and the cross section of the invention is square and has round corners. The cross section of the bamboo is observed under a microscope, and a large number of longitudinal fibers are contained between the inner wall and the outer wall of the square bamboo. It is this longitudinal fiber that plays a critical role in the axial mechanical properties of square bamboo. The invention refers to the macroscopic and microscopic structures of the square bamboo, and simplifies the longitudinal fibers in the square bamboo poles into thin-wall rib plate structures and simplifies the appearance of the square bamboo into thin-wall double-ring tubular structures under the comprehensive consideration of mechanical properties and processing technology. Under the consideration of engineering application, machining precision and cost, the number of the thin-wall rib plates is determined to be 4 on the premise of ensuring the mechanical property.

As shown in fig. 6 and 7, the imitation square bamboo support body 1-2 is composed of thin-wall rib plates 1-2-1; outer wall 1-2-2; the inner wall 1-2-3. The appearance is S-shaped, the height is 122-124mm, the maximum width is 199-201mm, the radius of the arc is 5-6mm, and the overall arc length of the S-shaped is 334-336 mm. The cross section of the imitation square bamboo support body is of a thin-wall double-ring tubular structure with a square fillet. The side length of the outer wall is 40mm, and the wall thickness can be 0.8-1mm in consideration of process precision. The radius of the fillet is 10mm, the length of the thin-wall ribbed plate is 2.8-3mm, the width is 1mm, the fillet is rectangular, and the middle point of each edge is provided with a thin-wall ribbed plate which is connected with the inner wall and the outer wall. The inner wall is formed by the outer wall after 2.8-3mm of deviation, the wall thickness is the same as that of the outer wall, and the inner wall is connected with the outer wall through the thin-wall ribbed plate structure. The square thin-wall double-ring tubular structure with the round corners integrates the advantages of the square tube partition plate structure in impact resistance, the stability of the round tube thin-wall structure and the easiness in installation of the square tube. The imitation square bamboo support body is stable in buckling deformation, uniform in deformation amount and good in crashworthiness. Through finite element simulation analysis, the structural parameters of the thin-wall pipe are found to have certain influence on initial peak load and specific energy absorption. The initial peak load and specific energy absorption of the imitation square bamboo structure thin-walled tube are increased along with the increase of the wall thickness of the thin-walled tube. The initial peak load decreases with increasing rib length, the specific energy absorption increases with increasing rib length, but the effect is less and an optimum solution is obtained with a wall thickness of 0.89 mm.

The imitated square bamboo support bodies 1-2 are evenly distributed in 8 groups along the circumference of the inner tyre ring 1-3, and the interval between every two groups of support bodies is 45 degrees. And 3-4 groups of imitated square bamboo support bodies are uniformly arranged from the radial middle point of the tire to two sides, and the upper and lower intervals between each group are 10 mm-12 mm. The proportion of the imitation square bamboo support body in the whole tire is greater than 1/3 and less than 1/2. The upper end of the imitation square bamboo support body is fixedly combined with the tire crown 1-1, and the lower end of the imitation square bamboo support body is fixedly combined with the tire inner ring 1-3.

The imitation square bamboo support body 1-2 has a double-ring tubular structure with thin walls, thin-wall rib plates and the like for enhancing toughness, so that the transverse tensile strength of the support body is improved, and the support body is not easy to damage when bearing different environmental loads. The support body of the square bamboo structure with round chamfers and ribs in four directions has good crashworthiness and stability, stable buckling deformation and small load fluctuation in the axial collision process, has good shock absorption and energy absorption functions, and can improve the stability and comfort of a vehicle in the form process. And the pneumatic structure is abandoned and the imitation bamboo support body is adopted for replacement, so that the possibility of air leakage and tire burst of the pneumatic tire is avoided, and the life and property safety of a driver is greatly guaranteed. The imitation square bamboo support body is light in structure and is also beneficial to improving the fuel economy.

As shown in FIG. 1 and FIG. 2, the diameter of the inner tire 1-3 is 300-. The outer side of the tire inner ring 1-3 is fixedly combined with the imitated square bamboo support body 1-2, and the inner side of the tire inner ring and the wheel hub are assembled in an interference fit mode and further bonded through an RFL (radio frequency resistant) adhesive.

As shown in fig. 7, the hub 2 is composed of a rim 2-1, spokes 2-2 and a disc 2-3; the surface of the rim 2-1 is provided with a groove for assembling with the inner tyre ring 1-3, and the rest sizes of the rim with the thickness of 4-5mm are determined according to the actual condition and the size of the inner tyre ring; the sizes of the spoke 2-2 and the wheel disc 2-3 have no special requirements and can be determined according to practical conditions.

The tread material of the tire crown is made of a ground rolling resistance rubber material, the reinforcing layer of the measuring layer is made of an inextensible composite material, and the reticular shear layer is made of a synthetic rubber material with the shear modulus of 3-20 MPa. The shear tape was embedded in the tread and further bonded with RFL adhesive.

The tread 1-1-1 of the tire crown 1-1 is made of a low rolling resistance rubber material, the reinforcing layer 1-1-1 and the reinforcing layer 1-1-3 are made of a non-extensible composite material, the reticular shear layer 1-1-2 is made of a synthetic rubber material with a shear modulus of 3-20MPa, and the tire inner ring 1-3 is made of a rubber material. The tire crown is made by a casting molding process.

The material of the imitation square bamboo support body 1-2 can be selected from one of polyurethane, high-performance resin material or TPE/TPR thermoplastic elastomer material, and is manufactured by 3D printing technology.

The 3D printing technology, namely the additive manufacturing technology, can not be influenced by the shape complexity of a product, can form a complex curved surface, and is very suitable for manufacturing the imitation square bamboo support body 1-2. In order to ensure the manufacturing accuracy and reduce errors, the invention uses a Selective Laser Sintering (SLS) technology to print the imitated square bamboo support body 1-2.

The specific manufacturing process is that a three-dimensional model of the tire is drawn by utilizing modeling software. And (3) importing the three-dimensional model into corresponding slicing software for process setting, and setting tire SLS printing and forming related process parameters: the thickness of the printing layer is 0.8-1mm of the wall thickness of the imitation square bamboo support body 1-2, the printing temperature is 30 ℃, the printing speed is 7.5mm/s, and the filling rate is 100%. The SLS printing mode is powder sintering, a layer of powder of a material required for manufacturing the imitation square bamboo support body 1-2 is flatly laid on the upper surface of a formed workpiece by a press roll of an SLS printer, and a laser beam is controlled by a numerical control system to scan and irradiate on a powder layer according to the section outline of the layer so that the temperature of the powder is raised to a melting point, so that sintering is carried out and bonding is realized on the formed part below. When the work table descends one layer thickness after one layer of section is sintered, the press roller can uniformly lay a layer of powder on the upper surface and start the sintering of a new layer of section, and the operation is repeated to directly and completely mold the workpiece.

After printing, if the support body is arranged in a grinding tool according to the above description, 3 to 4 rows of annular imitated square bamboo support bodies 1-2 are formed, and a shear band and an inner tyre ring 1-3 which are connected with the imitated square bamboo support bodies 1-2 into a whole are respectively cast on the inner side and the outer side of the support body. Therefore, the inner tire ring 1-3 and the shear band can be fixedly connected with the imitated square bamboo support body 1-2 during molding. The tread 1-1-1 is then fitted with the reinforcement layer 1-1-2 of the shear band and further bonded with an RFL adhesive.

The casting molding process specifically comprises the steps of inputting a polymerization raw material into an inner cavity of a machine head through a metering pump by using an injection molding machine, directly injecting the mixture into an inner cavity of a mold after mixing, and heating a tire by using a core mold to cure the tire. During injection molding, the whole mold is turned to a vertical position by the power oil cylinder of the turning frame, gas generated inside during injection is exhausted through the exhaust holes at the moment, liquid materials overflow from the exhaust holes during material injection, after overflowing for 1 to 2 seconds, injection is stopped, and then pressure is applied to the materials in the mold cavity, so that the materials are combined with the sheared band and the tire inner ring 1-3 in a mutual permeation mode. And after the injection is finished, the power oil cylinder is restored to the horizontal position for vulcanization, and then the processing can be finished.

The hub 2 is provided with a groove for being assembled with the inner sides of the inner tires 1-3 through interference fit and further bonded by RFL adhesive. The hub 2 is made of aluminum alloy, and a low-pressure precision casting method is adopted, wherein the specific casting process comprises the following steps: and fixing the mould above the closed high-temperature aluminum solution pool, introducing dry compressed air into the closed solution pool to ensure that the aluminum solution enters a cavity in the mould under the gas pressure, and keeping the gas pressure of the aluminum solution pool until the casting is finished. The manufacturing process has the characteristics of high yield, clear outline, good compactness, higher mechanical property and the like.

Through simulation analysis, compared with the traditional pneumatic tire and non-pneumatic tire with the same specification: (1) the non-pneumatic tire uses the imitation square bamboo support structure to replace the traditional pneumatic structure, and the possibility of air leakage and tire burst is completely avoided. (2) The imitation square bamboo supporting structure has stable buckling deformation and small load fluctuation in the axial collision extrusion process, and has good shock absorption and energy absorption functions. (3) The square bamboo-like supporting structure has high transverse tensile strength and is not easy to expand and split when bearing different environmental loads. (4) The shearing belt structure provided by the invention can provide uniform ground pressure for the tire, and the reticular shearing layer can reduce the temperature rise of the tire in the running process. (5) The non-pneumatic tire with the imitation square bamboo support structure has low mass, can improve fuel economy, and is beneficial to environmental protection and energy conservation by using an environment-friendly polyurethane material.

The above description is only one of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.