Variable stiffness tire and overall tire manufacturing device

Abstract

The present application relates to the technical field of tire overall preparation, and proposes a variable stiffness tire and a tire overall preparation device, which can adapt to various driving conditions and realize the collaborative optimization of comfort and control performance, and the structure can effectively disperse flexural stress, and is not prone to heat accumulation, bulging and cracking, thereby significantly improving high-speed durability and load capacity, and the matching tire overall preparation device can adapt to the molding process of the tire body, effectively improve tire production efficiency and manufacturing precision, and comprises a tire body and a triangular rubber ring, wherein the tire body comprises a tread, a sidewall and an inner tire ring, the sidewall is divided into a shoulder section, a sidewall middle section and a bead section in the radial direction, the stiffness of the bead section, the shoulder section and the sidewall middle section decreases in turn, the sidewall middle section is a main flexible deformation area, the shoulder section provides lateral restraint, the bead section provides high stiffness support, the tread is fixedly connected with the shoulder section, and the inner tire ring is fixedly connected with the triangular rubber ring.

Description

Technical Field

[0001] This invention relates to the field of tire integral manufacturing technology, specifically to a variable stiffness tire that balances comfort and handling, and a tire integral manufacturing apparatus. Background Technology

[0002] As is well known, tires are elastic load-bearing components composed of rubber, steel wire, cord layers, reinforcing fillers, and functional additives. They are widely adaptable to various vehicle driving conditions, while manufacturing equipment is an auxiliary device formed to support tire manufacturing.

[0003] Traditional tires generally use a continuous homogeneous structure on the sidewall, resulting in a single overall stiffness. If the rubber material is too soft, the vehicle's handling will be poor, and the tire is prone to bulging at high speeds. If the material is too hard, the ride will be bumpy and uncomfortable, and the bead area will be prone to cracking. Existing variable stiffness tires are mostly continuous transition designs, which cannot achieve precise stiffness decoupling for the three key areas of the tire shoulder, the middle of the sidewall, and the bead, making it difficult to meet the adaptive force matching requirements of different parts. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a variable stiffness tire that balances comfort and handling, along with a tire assembly fabrication device. The tire body can adapt to various driving conditions, achieving synergistic optimization of comfort and handling performance. Its structure effectively disperses flexural stress, reducing the likelihood of heat buildup, bulges, and cracks, significantly improving high-speed durability and load-bearing capacity. The accompanying tire assembly fabrication device is compatible with the tire body's molding process, effectively improving tire production efficiency and manufacturing precision.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a variable stiffness tire that balances comfort and handling, comprising a tire body and a triangular rubber ring. The tire body includes a tread, a sidewall, and an inner ring. The sidewall is radially divided into three segments: a shoulder segment, a middle sidewall segment, and a bead segment. The stiffness of the bead segment, shoulder segment, and middle sidewall segment decreases sequentially. The middle sidewall segment is the main flexible deformation zone, the shoulder segment provides lateral constraint, and the bead segment provides high-stiffness support. The tread is fixedly connected to the shoulder segment, and the inner ring is fixedly connected to a triangular rubber ring. A covering strip is provided on the outer side of the triangular rubber ring and the inner ring. The tread, shoulder segment, middle sidewall segment, and bead segment are all fixedly connected to the covering strip.

[0006] Preferably, the shoulder section accounts for 25%–35% of the sidewall height, the middle section of the sidewall accounts for 35%–50% of the sidewall height, and the bead section accounts for 15%–25% of the sidewall height.

[0007] Preferably, the Shore hardness of the tire shoulder section is 60–65, the Shore hardness of the tire sidewall section is 50–55, and the Shore hardness of the tire bead section is 65–75.

[0008] A tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling includes a rotary worktable. A first fixed frame, a second fixed frame, a third fixed frame, and a fixed plate are fixedly connected to the rotary worktable. A first electric lifting rod is installed inside the first fixed frame, and a lifting plate is slidably connected to the first fixed frame. Semi-enclosed structures are installed on both the lifting plate and the fixed plate, and the two semi-enclosed structures are symmetrically arranged and matched vertically. Second electric telescopic rods are installed on both the second and third fixed frames, and the telescopic ends of the two second electric telescopic rods... An upper assembly frame and an upper pressing frame are installed respectively. The upper pressing frame and the upper assembly frame are respectively matched with a lower pressing frame and a lower assembly frame. The upper assembly frame and the lower assembly frame are provided with semi-pressing grooves that match the covering strip. The lower pressing frame is provided with support ring grooves that match the tire shoulder section, the tire sidewall middle section and the tire bead section. The upper pressing frame is provided with pressing protrusions that match the covering strip. An external wheel pressing structure and an internal roller pressing structure are installed on the rotary worktable. The external wheel pressing structure matches the two semi-pressing grooves, and the internal roller pressing structure matches the two semi-covering structures.

[0009] Preferably, both of the semi-enclosed structures include electric control rods, and a synchronization frame is fixedly connected to the telescopic end of each of the two electric control rods. Multiple transmission rods are rotatably connected to each of the two synchronization frames, and an assembly mold frame is rotatably connected to each of the multiple transmission rods. Multiple sliding slots are provided on both the fixed plate frame and the lifting plate frame, and the multiple assembly mold frames slide in cooperation with the multiple sliding slots respectively.

[0010] Preferably, the first fixed frame has two guide ports, each with a guide post slidably connected to it, and both guide posts are fixedly connected to the lifting plate frame.

[0011] Preferably, the built-in roller pressing structure includes a fixed cylinder, which is fixedly connected to the rotary worktable. A rotating frame is rotatably connected to the fixed cylinder, and a horizontal rotating frame is rotatably connected to the rotating frame. A first servo motor and a second servo motor are mounted on the rotating frame. The first servo motor is used to drive the rotation of the rotating frame relative to the fixed cylinder, and the second servo motor is used to drive the rotation of the horizontal rotating frame relative to the rotating frame. An electric drive rod is installed inside the horizontal rotating frame. A support ring is installed on the execution end of the electric drive rod, and a connecting shaft is rotatably connected to the support ring. Both ends of the connecting shaft are fixedly connected to pressing wheels.

[0012] Preferably, a cutting block is fixedly connected to the outside of the support ring. The cutting block is used to fill the gap between the two sets of pressure rollers and eliminate the roller pressure blind zone.

[0013] Preferably, the external wheel pressing structure includes an electric telescopic crossbar, which is mounted on the rotary workbench. A wheel frame is mounted on the electric telescopic crossbar, a variable frequency motor is mounted outside the wheel frame, and a roller is rotatably mounted inside the wheel frame. The output shaft of the variable frequency motor is connected to the roller in a transmission connection.

[0014] Preferably, the rotary worktable is rotatably connected to a central column frame, and a fixing plate is installed at the bottom of the central column frame, with multiple anchoring holes on the fixing plate.

[0015] Compared with the prior art, the present invention provides a variable stiffness tire that balances comfort and handling, and an integral tire manufacturing device, which has the following beneficial effects: (1). In this invention, by optimizing the structure of the tire shoulder section, it is made to exhibit medium-high stiffness and moderate thickness in the area near the tire shoulder. Combined with a shorter and larger angled reinforcing bundle layer, tire shoulder deformation can be effectively suppressed and tire high-speed driving stability can be improved.

[0016] (2). In this invention, the design of the middle section of the tire sidewall makes the area less rigid, the rubber material softer and thinner, which mainly plays the role of buffering and shock absorption, thereby significantly improving ride comfort.

[0017] (3). In this invention, the structure of the bead segment is designed to give it high rigidity, large thickness and high modulus near the bead segment and the triangular rubber ring, and is reinforced with a wrapping strip to effectively improve the tire’s support performance and durability.

[0018] (4). In this invention, the design of the tire integral preparation device for the variable stiffness tire that takes into account both comfort and handling can be adapted to the production needs of the above-mentioned variable stiffness tire that takes into account both comfort and handling, providing assistance for tire body molding and manufacturing, simplifying the production process and improving the convenience of preparation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the tire body of the present invention in cross-section; Figure 2 This is a three-dimensional structural schematic diagram of the tire integral manufacturing apparatus of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at point B; Figure 5 This is a three-dimensional structural diagram of the first fixing frame of the present invention; Figure 6 This is a three-dimensional structural diagram of the cooperation between the support ring, connecting shaft, and pressure wheel of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the tire integral manufacturing apparatus of the present invention from another angle; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point C in the middle; Figure 9 For the present invention Figure 7 A magnified schematic diagram of the local structure at point D; Figure 10 This is a three-dimensional structural diagram of the tire integral manufacturing apparatus of the present invention, viewed from below. Figure 11 For the present invention Figure 10 A magnified schematic diagram of the local structure at point E; Figure 12 This is a three-dimensional structural diagram of the cooperation between the lifting plate frame and the guide column of the present invention; Figure 13 This is a three-dimensional structural diagram showing the disassembled state of multiple assembled mold frames within a semi-enclosed structure on the upper side of the present invention.

[0020] In the diagram: 1. Tread; 2. Shoulder section; 3. Sidewall section; 4. Bead section; 5. Inner bead; 6. Triangular rubber ring; 7. Covering tape; 8. Rotary worktable; 9. First fixed frame; 10. Second fixed frame; 11. Third fixed frame; 12. Fixed plate frame; 13. First electric lifting rod; 14. Lifting plate frame; 15. Second electric telescopic rod; 16. Upper assembly frame; 17. Upper pressing frame; 18. Lower assembly frame; 19. Lower pressing frame; 20. Semi-pressing groove; 21. Support ring groove; 22. Pressing protrusion. 23. Electric control lever; 24. Synchronous frame; 25. Transmission rod; 26. Assembly mold frame; 27. Sliding strip opening; 28. Guide opening; 29. ​​Guide column; 30. Fixed cylinder; 31. Adjustment frame; 32. First servo motor; 33. Second servo motor; 34. Horizontal rotating frame; 35. Electric drive rod; 36. Support ring; 37. Connecting shaft; 38. Pressing roller; 39. Cutting block; 40. Electric telescopic crossbar; 41. Wheel frame; 42. Variable frequency motor; 43. Roller roller; 44. Central column frame; 45. Fixed plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] For examples, please refer to Figures 1-13This is a variable stiffness tire that balances comfort and handling. It includes a tire body and a triangular rubber ring 6. The tire body comprises a tread 1, a sidewall, and an inner bead 5. The sidewall is radially divided into three segments: a shoulder segment 2, a middle sidewall segment 3, and a bead segment 4. The stiffness of the bead segment 4, shoulder segment 2, and middle sidewall segment 3 decreases sequentially. The middle sidewall segment 3 is the main flexible deformation zone, the shoulder segment 2 provides lateral restraint, and the bead segment 4 provides high-stiffness support. The tread 1 is fixedly connected to the shoulder segment 2. The inner bead 5 is fixedly connected to the triangular rubber ring 6. A covering strip 7 is provided around the outside of the triangular rubber ring 6 and the inner bead 5. The tread 1, shoulder segment 2, middle sidewall segment 3, and bead segment 4 are all fixedly connected to the covering strip 7. The shoulder segment 2 occupies 25%–35% of the sidewall height, and the middle sidewall segment 3 occupies 35%–50% of the sidewall height. The bead segment 4 occupies 15%–25% of the tire sidewall height. The Shore hardness of the shoulder segment 2 is 60–65, the Shore hardness of the middle sidewall segment 3 is 50–55, and the Shore hardness of the bead segment 4 is 65–75. By optimizing the structure of the shoulder segment 2, it exhibits medium-high stiffness and moderate thickness in the area near the shoulder. Combined with shorter and larger angled reinforcing bundles, it can effectively suppress shoulder deformation and improve tire high-speed driving stability. Through the design of the middle sidewall segment 3, the stiffness of this area is lower, the rubber material is softer, and the thickness is thinner, mainly playing a role in cushioning and shock absorption, thereby significantly improving ride comfort. Through the structural design of the bead segment 4, the area near the bead segment 4 and the triangular rubber ring 6 has high stiffness, large thickness, and high modulus characteristics, and is supplemented by a reinforced wrapping strip 7, which effectively improves the tire's support performance and durability.

[0023] A tire integral manufacturing apparatus for a variable stiffness tire that balances comfort and handling includes a rotary worktable 8. A first fixed frame 9, a second fixed frame 10, a third fixed frame 11, and a fixed plate frame 12 are fixedly connected to the rotary worktable 8. A first electric lifting rod 13 is installed inside the first fixed frame 9, and a lifting plate frame 14 is slidably connected to the first fixed frame 9. Semi-covering structures are installed on both the lifting plate frame 14 and the fixed plate frame 12, and the two semi-covering structures are symmetrically arranged and matched vertically. Second electric telescopic rods 15 are installed on both the second fixed frame 10 and the third fixed frame 11. An upper assembly frame 16 and an upper pressing frame 17 are respectively installed on the telescopic ends of the two second electric telescopic rods 15. The upper pressing frame 17 and the upper assembly frame 16 are respectively matched with a lower pressing frame 19 and a lower assembly frame 18. Both the upper assembly frame 16 and the lower assembly frame 18 are provided with covering tapes. The lower pressing frame 19 is provided with a support ring groove 21 that matches the tire shoulder section 2, the tire sidewall middle section 3, and the tire bead section 4. The upper pressing frame 17 is provided with a pressing protrusion 22 that matches the covering strip 7. The rotary worktable 8 is equipped with an external wheel pressing structure and an internal roller pressing structure. The external wheel pressing structure matches the two half pressing grooves 20, and the internal roller pressing structure matches the two half covering structures. Both half covering structures include an electric control rod 23. The telescopic ends of the two electric control rods 23 are fixedly connected to a synchronous frame 24. Both synchronous frames 24 are rotatably connected to multiple transmission rods 25. Each of the multiple transmission rods 25 is rotatably connected to a splicing mold frame 26. The fixed plate frame 12 and the lifting plate frame 14 are provided with multiple sliding slots 27. The multiple splicing mold frames 26 are slidably engaged with the multiple sliding slots 27 respectively.

[0024] It should be further explained that the first fixed frame 9 has two guide ports 28, and guide posts 29 are slidably connected in both guide ports 28. Both guide posts 29 are fixedly connected to the lifting plate frame 14. The built-in roller pressing structure includes a fixed cylinder 30, which is fixedly connected to the rotary worktable 8. A rotating frame 31 is rotatably connected to the fixed cylinder 30, and a horizontal rotating frame 34 is rotatably connected to the rotating frame 31. A first servo motor 32 and a second servo motor 33 are installed on the rotating frame 31. The first servo motor 32 is used to drive the rotation of the rotating frame 31 relative to the fixed cylinder 30, and the second servo motor 33 is used to drive the rotation of the horizontal rotating frame 34 relative to the rotating frame 31. An electric drive rod 35 is installed inside the horizontal rotating frame 34. A support ring 36 is installed on the execution end of the electric drive rod 35. A connecting shaft 37 is rotatably connected to the support ring 36. A pressure roller 38 is fixedly connected to both ends of the connecting shaft 37. A pressure roller 38 is fixedly connected to the outside of the support ring 36. A cutting block 39 is used to fill the space between two pressure rollers 38. The external wheel pressing structure includes an electrically telescopic crossbar 40, which is mounted on the rotary worktable 8. A wheel frame 41 is mounted on the electrically telescopic crossbar 40. A variable frequency motor 42 is mounted on the outside of the wheel frame 41, and a pressure roller 43 is rotatably mounted inside the wheel frame 41. The output shaft of the variable frequency motor 42 is connected to the pressure roller 43. The structure utilizes variable stiffness tires designed for both comfort and handling. The design of the tire integral preparation device can adapt to the production requirements of the above-mentioned variable stiffness tires that take into account both comfort and handling, provide assistance for tire body molding and manufacturing, simplify the production process, and improve the convenience of preparation. The rotary worktable 8 is rotatably connected to the central column frame 44, and the bottom end of the central column frame 44 is equipped with a fixing plate 45. The fixing plate 45 has multiple anchor holes. By installing expansion bolts in the anchor holes, the central column frame 44 can be fixedly installed at the place of use, thereby facilitating the use of the rotary worktable 8.

[0025] In this embodiment, the first electric lifting rod 13, the second electric telescopic rod 15, the electric control rod 23, the first servo motor 32, the second servo motor 33, the electric drive rod 35, the electric telescopic crossbar 40, and the frequency conversion motor 42 are all commercially available conventional devices known to those skilled in the art. In this invention, we are simply using them without modifying their structure or function. Their setting method, installation method, and electrical connection method can be easily understood by those skilled in the art by following the instructions for use, and will not be described in detail here.

[0026] In summary, the working principle of this variable stiffness tire and tire assembly device, which balances comfort and handling, is as follows: Before manufacturing the tire body, the assembly and debugging of the tire assembly device are completed first. This includes the electrical installation and operational debugging of the first electric lifting rod 13, the second electric telescopic rod 15, the electric control rod 23, the first servo motor 32, the second servo motor 33, the electric drive rod 35, the electric telescopic crossbar 40, and the variable frequency motor 42. All necessary raw materials are prepared, including rubber compounds adapted to the different stiffness requirements of the tire shoulder section 2, the sidewall middle section 3, and the bead section 4. The tire shoulder section 2 uses a rubber compound with a Shore hardness of 60-65 and a moderate thickness, combined with a shorter... For the larger angle of the reinforcing bundles, the middle section 3 of the sidewall uses a softer and thinner cushioning compound with a Shore hardness of 50-55, while the bead section 4 uses a high-strength compound with a Shore hardness of 65-75, greater thickness, and higher modulus. Simultaneously, auxiliary materials such as the tread 1, triangular rubber ring 6, and covering tape 7 are prepared, and pre-forming of each tire segment is carried out. The pre-prepared rubber compounds for the shoulder section 2, middle section 3 of the sidewall, and bead section 4 are calendered and cut to preset dimensions. During the calendering process of the shoulder section 2, the reinforcing bundles are embedded to ensure a smooth and precise angle, thereby improving its support and durability. The middle section 3 of the sidewall is treated with flexibility to ensure its cushioning and shock absorption. The effect is that the tread 1 is rolled into a preset shape and the connection surface with the shoulder section 2 is roughened to facilitate subsequent fixing. The triangular rubber ring 6 is fixed to the inner ring 5 in advance to ensure a firm connection. Then, the wrapped covering tape 7 is fitted onto the lower assembly frame 18. Next, the second electric telescopic rod 15 at the top of the second fixing frame 10 is operated to push the upper assembly frame 16 down, so that the upper assembly frame 16 and the lower assembly frame 18 make vertical contact. During this process, the upper assembly frame 16 will also be inserted into the annular structure made of the covering tape 7. Then, the electric telescopic crossbar 40 is operated to push the wheel frame 41 to move closer to the lower assembly frame 18, so that the roller 43 is slowly inserted into the semi-pressed position. The groove 20 assists in shaping the covering strip 7. During the shaping process, the variable frequency motor 42 starts to drive the roller 43 to rotate. Since the lower assembly frame 18 and the rotary worktable 8 have rotational freedom, and the upper assembly frame 16 and the extension end of the corresponding second electric telescopic rod 15 also have rotational freedom, the rotation of the upper assembly frame 16 and the lower assembly frame 18 can form a complete annular pressing operation for the covering strip 7. After shaping, the covering strip 7 forms a recessed space for the tire inner ring 5 and the triangular rubber ring 6 to be inserted. Then, the roller 43 is first controlled to move away from the semi-pressing groove 20, and then the upper assembly frame 16 is controlled to rise away from the lower assembly frame 18 so as to remove the covering strip 7.

[0027] Furthermore, after the covering tape 7 is removed, the pre-formed inner ring 5 and the triangular rubber ring 6 are placed together in the recessed area pressed into the covering tape 7. Then, the pre-formed bead segment 4, sidewall middle section 3, and shoulder segment 2 are sequentially fitted into the support ring groove 21, ensuring that the bead segment 4, sidewall middle section 3, and shoulder segment 2 are precisely fitted to the inner surface of the support ring groove 21. Finally, the covering tape 7 is placed into the support ring groove 21, ensuring that the covering tape 7 is positionally matched with the bead segment 4, sidewall middle section 3, and shoulder segment 2. Then, the second electric telescopic rod 15 on the third fixing bracket 11 is activated to push the upper... The pressing frame 17 moves downward and mates with the lower pressing frame 19. The pressing protrusion 22 on the upper pressing frame 17 is used to press and position the triangular rubber ring 6 and the outer covering strip 7 of the tire inner ring 5. In this state, the covering strip 7 is precisely fitted against the outer sides of the triangular rubber ring 6 and the tire inner ring 5. Simultaneously, the pressing protrusion 22 inside the upper pressing frame 17 contacts the covering strip 7, initially compacting it to ensure that the covering strip 7 is wrinkle-free and without deviation. The pressure transmission through the covering strip 7 also causes the bead section 4, the sidewall middle section 3, and the shoulder section 2 to sequentially adhere to the covering strip 7, completing the preparation of a single side of the tire body. Repeat the aforementioned steps to complete the preparation of the other side section. After preparation, control the upper pressing frame 17 to rise, thereby separating the upper pressing frame 17 from the lower pressing frame 19 to remove the prepared side section. Symmetrically assemble the two tire side sections, and wrap the covering tape 7 again at the joint contact point of the two side sections to firmly connect them. Then, fit the pre-formed tread 1 onto the two side sections, and place the structure formed by integrating the tread 1 and the tire side sections into the lower semi-covering structure. Next, activate the first electric lifting rod 13 on the first fixing frame 9 to push the lifting... The lowering frame 14 moves downward, causing the semi-encased structure on the lifting frame 14 to contact and assemble with the semi-encased structure on the fixed frame 12. Then, the two electric control levers 23 are activated simultaneously, causing the multiple assemblies 26 within each semi-encased structure to assemble into a ring. During this process, driven by the electric control levers 23, the assemblies 26 slide along the sliding strip opening 27 through the linkage of the synchronous frame 24 and the transmission rod 25. After the assemblies 26 are assembled, they will fit tightly against the outside of the tire body, achieving precise fixation of each segment of the tire and preventing deformation during subsequent rolling.

[0028] After positioning, the built-in roller pressing structure is activated. First, the second servo motor 33 drives the transverse rotating frame 34 to rotate relative to the adjusting frame 31, adjusting the two pressing rollers 38 to the same height so that the pressing rollers 38 can be inserted into the space between the two tire inner rings 5. Then, the electric drive rod 35 pushes the support ring 36 outward, allowing the pressing rollers 38 to enter the inner side of the tire body. After the pressing rollers 38 pass through the narrow space between the two tire inner rings 5 ​​and enter the interior of the tire body, the second servo motor 33 runs again to control the two pressing rollers 38 to enter the vertical position. After both pressing rollers 38 are in the vertical position, the electric drive rod 35 continues to push the support ring 36 outward until the pressing rollers 38 make contact with the covering belt 7. In this state, the cutting block 39 can press the two tires into the tire body. The space between the pressure rollers 38 is filled to avoid problems such as missed pressure or insufficient pressure during the rolling process. Then, the first servo motor 32 drives the adjustment frame 31 to rotate around the fixed cylinder 30. The pressure rollers 38 perform all-round rolling on the inner side of the tire body, so that the covering tape 7 is tightly bonded to the tread 1 and the various structures of the tire side. After the rolling is completed, the pressure rollers 38 are adjusted to pull out the tire body, and then the multiple splicing mold frames 26 are adjusted to separate each other. The initially formed tire body is taken out and then placed into the subsequent equipment for vulcanization treatment. After vulcanization, the tire is cooled, trimmed and inspected to remove excess rubber. The rigidity, thickness and firmness of each tire segment and the joints are checked. After confirming that there are no problems such as bulges, cracks or delamination, the preparation of the entire tire body is completed.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable stiffness tire that balances comfort and handling, comprising the tire body, characterized in that, It also includes a triangular rubber ring. The tire body includes a tread, a sidewall, and an inner ring. The sidewall is divided into three sections radially: a shoulder section, a middle sidewall section, and a bead section. The stiffness of the bead section, shoulder section, and middle sidewall section decreases sequentially. The middle sidewall section is the main flexible deformation area, the shoulder section provides lateral restraint, and the bead section provides high-stiffness support. The tread is fixedly connected to the shoulder section, and a triangular rubber ring is fixedly connected to the inner ring. A covering strip is provided on the outside of the triangular rubber ring and the inner ring. The tread, shoulder section, middle sidewall section, and bead section are all fixedly connected to the covering strip.

2. The variable stiffness tire that balances comfort and handling according to claim 1, characterized in that, The shoulder section accounts for 25%–35% of the sidewall height, the middle section accounts for 35%–50% of the sidewall height, and the bead section accounts for 15%–25% of the sidewall height.

3. The variable stiffness tire that balances comfort and handling according to claim 2, characterized in that, The Shore hardness of the tire shoulder section is 60–65, the Shore hardness of the tire sidewall section is 50–55, and the Shore hardness of the tire bead section is 65–75.

4. A tire integral manufacturing apparatus for a variable stiffness tire that balances comfort and handling, characterized in that, The preparation of the variable stiffness tire that balances comfort and handling as described in any one of claims 1-3 includes a rotary worktable. A first fixed frame, a second fixed frame, a third fixed frame, and a fixed plate frame are fixedly connected to the rotary worktable. A first electric lifting rod is installed inside the first fixed frame, and a lifting plate frame is slidably connected to the first fixed frame. Semi-enclosed structures are installed on both the lifting plate frame and the fixed plate frame. The two semi-enclosed structures are symmetrically arranged vertically and matched to each other. Second electric telescopic rods are installed on both the second and third fixed frames. The extension and retraction of the two second electric telescopic rods... An upper assembly frame and an upper pressing frame are respectively installed on the end. The upper pressing frame and the upper assembly frame are respectively matched with a lower pressing frame and a lower assembly frame. The upper assembly frame and the lower assembly frame are provided with semi-pressing grooves that match the covering strip. The lower pressing frame is provided with a support ring groove that matches the tire shoulder section, the tire sidewall middle section and the tire bead section. The upper pressing frame is provided with a pressing protrusion that matches the covering strip. An external wheel pressing structure and an internal roller pressing structure are installed on the rotary worktable. The external wheel pressing structure matches the two semi-pressing grooves, and the internal roller pressing structure matches the two semi-covering structures.

5. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 4, characterized in that, Both of the semi-enclosed structures include electric control rods, and a synchronization frame is fixedly connected to the telescopic end of each of the two electric control rods. Multiple transmission rods are rotatably connected to each of the two synchronization frames, and an assembly mold frame is rotatably connected to each of the multiple transmission rods. Multiple sliding slots are provided on both the fixed plate frame and the lifting plate frame, and the multiple assembly mold frames slide in cooperation with the multiple sliding slots respectively.

6. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 5, characterized in that, The first fixed frame has two guide ports, and guide columns are slidably connected to both guide ports. Both guide columns are fixedly connected to the lifting plate frame.

7. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 6, characterized in that, The built-in roller pressing structure includes a fixed cylinder, which is fixedly connected to the rotary worktable. A rotating frame is rotatably connected to the fixed cylinder, and a horizontal rotating frame is rotatably connected to the rotating frame. A first servo motor and a second servo motor are mounted on the rotating frame. The first servo motor is used to drive the rotation of the rotating frame relative to the fixed cylinder, and the second servo motor is used to drive the rotation of the horizontal rotating frame relative to the rotating frame. An electric drive rod is installed inside the horizontal rotating frame. A support ring is installed on the execution end of the electric drive rod, and a connecting shaft is rotatably connected to the support ring. Both ends of the connecting shaft are fixedly connected to pressing rollers.

8. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 7, characterized in that, A cutting block is fixedly connected to the outside of the support ring. The cutting block is used to fill the gap between the two sets of pressure rollers and eliminate the blind zone of roller pressing.

9. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 8, characterized in that, The external wheel pressing structure includes an electric telescopic crossbar, which is installed on the rotary workbench. A wheel frame is installed on the electric telescopic crossbar, a variable frequency motor is installed outside the wheel frame, and a roller is rotatably installed inside the wheel frame. The output shaft of the variable frequency motor is connected to the roller in a transmission connection.

10. The integral tire manufacturing apparatus for a variable stiffness tire that balances comfort and handling according to claim 9, characterized in that, The rotary worktable is rotatably connected to a central column frame, and a fixing plate is installed at the bottom of the central column frame. The fixing plate has multiple anchoring holes.

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