A building drum for forming a giant tire and a processing method thereof

Abstract

The present application relates to the technical field of the production of tires, in particular to a kind of for giant tire forming bonding drum and its processing method, including main shaft, transmission screw rod, transmission nut and guide disc, cone, shoe assembly, positioning roller, positioning cylinder and locking tooth block, cone is assembled with transmission nut and slides between two groups of guide disc along the axial direction of main shaft, cone sliding pushes shoe assembly and slides along the radial direction of main shaft, the positioning roller is coaxially connected with transmission screw rod, the positioning cylinder is assembled on main shaft and is used to push locking tooth block and move back and forth towards the tooth of positioning roller, improve the reliability and size accuracy of giant tire processing, reduce the scrap rate, the smoothness and safety of roller assembly are improved Tumbler embryo sliding, the adsorption between the increased tile block and tire rubber of magnet block is ensured Tire rubber is completely bonded on the outer ring wall of bonding drum, improve the accuracy and stability of bonding, improve giant tire production efficiency and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of bonding drum technology for tire production, and in particular to a bonding drum for giant tire molding and its processing method. Background Technology

[0002] The tire bonding drum is a component on a tire forming machine, which is one of the key pieces of equipment in the tire production process. The tire forming machine causes the drum shell of the bonding drum to expand and contract radially to process the wheel blank, thereby forming the final tire size. Tires can be divided into regular tires, medium tires, and giant tires according to their size.

[0003] Standard tires are the most common tire size, typically used in passenger cars, commercial vehicles, and light trucks, with a size range usually between 0.5 meters and 0.8 meters.

[0004] Medium-sized tires are typically used on medium-sized vehicles, such as medium-sized trucks, pickups, and some specialized vehicles. They are slightly larger than regular tires but smaller than giant tires.

[0005] Giant tires are commonly used on various heavy machinery and equipment, such as mining trucks and large excavators. Their size range is usually greater than 2 meters. Since these devices usually need to work under extreme conditions, giant tires are usually designed with a thicker carcass, making them large in size and heavy in weight. This poses a challenge to the production of giant tire molding and puts forward new requirements for the structural design of the bonding drum.

[0006] The tire rubber is wrapped around the outer ring wall of the bonding drum. After the bonding drum expands to the preset size, due to the large weight and size of the giant tire, the inward contraction force of the tire rubber is large, causing the bonding drum to shrink under pressure. This results in the processing diameter of the giant tire being smaller than the designed diameter, leading to a low yield rate of giant tires, waste of tire rubber, increased production costs, and failure to meet production requirements. Secondly, after the giant tire expands to the preset size, it needs to be removed from the bonding drum. However, due to the large weight of the giant tire, it is difficult to push it off the bonding drum under its own weight. This not only increases the difficulty of removing the giant tire but may also damage the inner wall of the bonding drum or the giant tire. Furthermore, the tire rubber used to produce giant tires has embedded steel wire rings and is large in size. Under its own weight, the tire rubber attached to the bonding drum is prone to slipping off the drum plate, making it difficult to completely attach the tire rubber to the outer ring wall of the bonding drum.

[0007] In summary, due to the difficulties in processing giant tires using bonding drums in existing technologies, as well as the special processing requirements and weight issues of giant tires, this project aims to research and develop bonding drum technology and equipment suitable for giant tires. Summary of the Invention

[0008] To address the problem that existing bonding drums cannot meet the processing requirements of giant tires due to their large weight, this application provides a bonding drum for giant tire molding, a processing method thereof, and the processing method thereof.

[0009] In a first aspect, the present invention provides a bonding drum for forming giant tires and a processing method thereof, which adopts the following technical solution:

[0010] A bonding drum for forming giant tires includes a main shaft, a drive screw, a drive nut, and guide discs. The main shaft is cylindrical. The drive screw is rotatably assembled with the main shaft and coaxially arranged. The drive nut is threadedly assembled with the drive screw. Two sets of guide discs are provided and respectively assembled at both ends of the main shaft. The outer ring wall of the main shaft has an elongated hole in the same direction of movement as the drive nut. The drum also includes a cone, a drum assembly, and a positioning assembly. The cone is assembled with the drive nut and slides along the axial direction of the main shaft between the two sets of guide discs. The drum assembly is slidably assembled between the two sets of guide discs. When the cone slides, it pushes the drum assembly to slide radially along the main shaft. The positioning assembly includes a positioning toothed wheel, a positioning cylinder, and a locking tooth block. The positioning toothed wheel is coaxially connected with the drive screw. The positioning cylinder is assembled on the main shaft and is used to push the locking tooth block to move back and forth toward the teeth of the positioning toothed wheel.

[0011] Preferably, the inner wall of the positioning toothed wheel is keyed to the outer wall of the transmission lead screw, and the positioning toothed wheel is provided with a rotating part protruding along its axial direction, and the rotating part is rotatably assembled with the inner wall of the main shaft.

[0012] Preferably, the main shaft has a connecting hole facing the positioning toothed wheel, the locking toothed block slides on the inner wall of the connecting hole, the fixed end of the positioning cylinder is connected to the guide plate, the movable end of the positioning cylinder is connected to the locking toothed block, and at least two sets of positioning components are provided, with the two sets of positioning components facing each other and located in the same diameter direction of the positioning toothed wheel.

[0013] Preferably, the drum tile assembly includes a tile and a slider. The slider is slidably mounted between two sets of guide discs. The inward end of the slider abuts against a cone. When the cone slides along the axial direction of the main shaft, it pushes the slider to move radially along the main shaft. The outward end of the slider is connected to the tile. The drum tile assembly is provided with N sets, where N is an even number and divisible by 4.

[0014] Preferably, it further includes a rolling assembly for rolling tire feeding, the rolling assembly including a roller and a bracket, the bracket being connected between two sets of guide discs parallel to the axis of the main shaft, the roller being rotatably assembled with the bracket, the roller's axis of rotation being arranged radially parallel to the main shaft, when the drum tile assembly is in a retracted state, the roller is exposed on the outer surface of the tile, and when the drum tile assembly is in an expanded state, the roller is concealed within the inner surface of the tile.

[0015] Preferably, the rolling assembly is provided in at least three sets, and the multiple sets of rolling assemblies are arranged at equal angular intervals along the axis of the main shaft. The included angle between the first set of rolling assemblies and the last set of rolling assemblies is included angle α, and included angle α < 180°.

[0016] Preferably, the tile also includes a magnet block and a cover plate. The inner surface of the tile has a storage slot for placing the magnet block. The cover plate is screwed to the tile and covers the storage slot. The tile is made of a non-magnetic material.

[0017] Preferably, the tile is provided with multiple sets of magnet blocks to form a magnet block group. The multiple sets of magnet block groups are arranged at equal angular intervals along the axis of the main shaft. The included angle between the first set of magnet block groups and the last set of magnet block groups is included angle b, which is less than 180°. The angle bisector of the included angle b coincides with the angle bisector of the included angle a.

[0018] Preferably, the end of the slider that abuts against the cone is provided with an inclined portion, the inclined portion being parallel to the cone surface of the cone, and the included angle between the inclined portion and the tile being an included angle c, which is 30°~34°.

[0019] Secondly, the present invention provides a processing method for forming giant tires, which adopts the following technical solution:

[0020] A processing method for forming giant tires, comprising the aforementioned bonding drum for forming giant tires, and comprising the following steps:

[0021] S1. Set the origin of the bonding drum: Mount the bonding drum on the tire forming machine, and set the position where the angle bisector of the included angle α is perpendicular to the bottom surface as the origin of the bonding drum.

[0022] S2. Applying adhesive to the bonding drum: The tire rubber is applied from the origin position. The tire forming machine rotates the main shaft, and after the bonding drum rotates 360°, the tire rubber is wrapped around the drum tile assembly of the bonding drum.

[0023] S3. Blowing drum expansion: The drive motor of the tire forming machine rotates the drive screw clockwise, the cone moves to the right, the drum assembly expands, and the tire rubber expands to the preset diameter;

[0024] S4. Adhesion drum expansion and retention: The positioning cylinder pushes the locking tooth block to move toward the positioning tooth wheel, locks the transmission screw, fixes the expansion diameter of the adhesion drum, and performs adhesive bonding to form a blank;

[0025] S5. Drum contraction: The positioning cylinder pushes the locking tooth block away from the positioning tooth wheel, releases the transmission screw, and the transmission motor of the tire forming machine rotates the transmission screw counterclockwise. The cone moves to the left, the drum assembly contracts, and the tire blank moves down under its own weight. The rollers support the tire blank.

[0026] S6. Embryo feeding: The embryo is pushed to move along the axial direction of the bonding drum, and the inner wall of the embryo rolls on the rollers, completing the separation of the embryo from the bonding drum. The beneficial effects of this invention are:

[0027] By designing the positioning component, after the drum assembly expands to the preset diameter, the positioning cylinder pushes the locking block towards the positioning wheel, locking the transmission screw and effectively fixing the expansion diameter of the bonding drum. This ensures that the bonding drum will not shrink under the inward contraction force of the tire rubber, improving the reliability of the giant tire processing process. It also ensures that the expansion diameter of the tire rubber can meet the preset diameter, improving the dimensional accuracy of giant tire processing, ensuring dimensional consistency and stability during the manufacturing process of giant tires, reducing the scrap rate, and improving the production efficiency and economic benefits of giant tires.

[0028] Through the design of the rolling assembly, the drum assembly is in a retracted state, with the rollers exposed on the outer surface of the drum, providing support for the tire blank. When the tire blank is pushed away from the bonding drum, it slides on the rollers, reducing the pressure and friction caused by the weight of the giant tire on the bonding drum. This makes the tire blank slide away from the bonding drum more smoothly, avoiding jamming problems caused by the weight of the tire blank. This makes the process of removing the giant tire more stable and safe, reducing the possibility of accidents during operation and ensuring production safety.

[0029] By incorporating magnets within the bonding drum, the increased magnetic force between the tire rubber and the bonding drum as it is applied ensures a complete bond between the tire rubber and the outer ring wall of the drum. This reduces the risk of slippage due to the tire rubber's weight, improves bonding accuracy and stability, minimizes the need for readjustments and re-applications due to slippage, enhances the production efficiency of giant tires, protects the integrity of the tire rubber, and improves the overall quality of giant tire production.

[0030] By setting the angle between the inclined part and the tile to 30°~34°, the force required for the cone to push the slider is reduced when the cone pushes the slider, thus reducing the driving energy consumption of the giant tire bonding drum. Secondly, it reduces the wear of moving parts in the bonding drum and extends the service life of the bonding process. Attached Figure Description

[0031] Figure 1 This is a perspective view of the shrinkage of the fitting drum in the embodiment of this application;

[0032] Figure 2 This is a cross-sectional view of the fitted drum in its contracted state in an embodiment of this application;

[0033] Figure 3 This is a cross-sectional view of the bulging state in the embodiment of this application;

[0034] Figure 4 This is an assembly diagram of the positioning component in an embodiment of this application;

[0035] Figure 5 This is a right view of the fitted drum in its retracted state in an embodiment of this application;

[0036] Figure 6 This is a partial right view of the bulging state of the attached drum in this embodiment of the application;

[0037] Figure 7 This is a schematic diagram of the assembly of the rolling component in an embodiment of this application;

[0038] Figure 8 This is a perspective view of the positioning roller in the embodiments of this application;

[0039] Figure 9 This is a perspective view of the tile in the embodiment of this application;

[0040] Figure 10 This is a first schematic diagram of tile assembly in an embodiment of this application;

[0041] Figure 11 This is a second schematic diagram of the tile assembly in an embodiment of this application;

[0042] Figure 12 This is a perspective view of the tile assembly in the embodiments of this application;

[0043] Figure 13 This is a front view of the tile assembly in the embodiments of this application;

[0044] Figure 14 This is a perspective view of the cone in the embodiments of this application;

[0045] Figure 15 This is a schematic diagram of the processing in the embodiments of this application;

[0046] Figure 16 This is a flowchart of the giant tire forming and processing method in the embodiments of this application.

[0047] Explanation of reference numerals in the attached drawings: 1. Main shaft; 1011. Long slot; 1012. Connecting hole; 102. Drive screw; 103. Drive nut; 1031. Connecting key; 104. Guide plate; 2. Cone; 3. Drum tile assembly; 301. Tile block; 3011. First meshing part; 3012. Second meshing part; 3013. Clearance space; 302. Slider; 3021. Inclined part; 4. Positioning assembly; 401. Positioning gear; 4011. Rotating part; 4012. Stepped groove; 4013. Snap-fit ​​part; 4014. Through hole; 402. Positioning cylinder; 403. Locking gear block; 5. Rolling assembly; 501. Roller; 502. Bracket; 6. Storage groove; 7. Reinforcing rib; 8. Sensing ring; 9. Threaded rod. Detailed Implementation

[0048] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so as to intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0049] In the description of this invention, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. When a feature is referred to as "set," "fixed," or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0050] In the description of this invention, the term "several" means one or more; "multiple" means two or more; "greater than," "less than," or "exceeding" are all understood to exclude the stated number; and "above," "below," or "within" are all understood to include the stated number. The terms "first" and "second" are understood to distinguish technical features and not to indicate or imply relative importance, the quantity of indicated technical features, or the order of the indicated technical features.

[0051] Furthermore, unless otherwise defined, the technical and scientific terms used in this invention have the same meanings as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for the purpose of describing particular embodiments only and not for limiting the invention. It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0052] Example 1: As Figure 1-15 As shown, a bonding drum for forming giant tires includes a main shaft 1, a transmission screw 102, a transmission nut 103, a guide plate 104, a cone 2, a drum tile assembly 3, and a positioning assembly 4. The main shaft 1 is cylindrical. The transmission screw 102 is rotatably assembled with the main shaft 1 and coaxially arranged. The transmission nut 103 is threadedly assembled with the transmission screw 102. Two sets of guide plates 104 are provided and respectively assembled at both ends of the main shaft 1. The outer ring wall of the main shaft 1 has an elongated hole 1011 in the same direction of movement as the transmission nut 103. The cone 2 is assembled with the transmission nut 103 and slides along the axial direction of the main shaft 1 between the two sets of guide plates 104. The cone 2 slides between two sets of guide discs 104, and the drum assembly 3 is slidably assembled between the two sets of guide discs 104. When the cone 2 slides, it pushes the drum assembly 3 to slide radially along the main shaft 1. The positioning assembly 4 includes a positioning toothed wheel 401, a positioning cylinder 402, and a locking tooth block 403. The positioning toothed wheel 401 is coaxially connected to the transmission screw 102. The positioning cylinder 402 is assembled on the main shaft 1 and is used to push the locking tooth block 403 to move back and forth toward the teeth of the positioning toothed wheel 401. This solves the problem that the large weight and size of the giant tire, the large inward shrinkage force of the tire rubber, and the shrinkage of the bonding drum after being compressed cause the processing diameter of the giant tire to be smaller than the designed diameter. After the drum assembly 3 expands to the preset diameter, the positioning cylinder 402 pushes the locking tooth block to move toward the positioning tooth wheel 401, locking the transmission screw 102 and fixing the expansion diameter of the bonding drum. The adhesive is then applied to form the tire blank. The positioning assembly 4 locks the transmission screw 102, which on the one hand keeps the expansion diameter of the bonding drum, ensuring that the expansion diameter of the tire rubber meets the preset diameter, so that the bonding drum can withstand the huge weight and force brought by the giant tire, and ensuring that the tire size meets the design requirements.

[0053] It should be noted that the axis of the cone 2 is coaxial with the axis of the main shaft 1, and the locking tooth block is provided with teeth that mesh with the tooth profile of the positioning tooth wheel 401.

[0054] Regarding the specific assembly structure of the cone 2 and the transmission nut 103, this embodiment also includes a connecting key 1031. One end of the connecting key 1031 is connected to the transmission nut 103, and the other end of the connecting key 1031 is connected to the cone 2. The connecting key 1031 slides in the elongated groove. It is worth mentioning that there are two sets of connecting keys 1031, which are arranged vertically and located on the same diameter of the main shaft 1. The vertical arrangement of the two sets of connecting keys 1031 can evenly distribute the force in the radial direction, reduce the deformation of the bonding drum caused by uneven force, thereby improving the accuracy and quality of tire forming. The vertically arranged connecting keys 1031 can provide stable support in the radial direction, enhance the connection stability between the cone 2 and the transmission nut 103, prevent loosening or separation when the cone 2 slides, improve the reliability of the bonding drum structure design, ensure the continuous and stable operation of the tire forming machine, and facilitate the processing of giant tires.

[0055] Regarding the specific structure of the connection between the positioning gear 401 and the transmission screw 102, the inner wall of the positioning gear 401 is keyed to the outer wall of the transmission screw 102. The positioning gear 401 has a rotating part 4011 protruding along its axial direction. The rotating part 4011 is rotatably assembled with the inner wall of the main shaft 1 to improve transmission accuracy and stability.

[0056] The system also includes a first bearing. The rotating part 4011 is cylindrical and has a stepped groove 4012 for assembling the first bearing. The inner ring of the first bearing is connected to the bottom wall of the stepped groove 4012, and the outer ring of the first bearing is connected to the inner ring of the main shaft 1. This improves the smoothness of the rotational assembly between the rotating part 4011 and the inner wall of the main shaft 1, thereby improving the smoothness of the rotation of the positioning gear 401.

[0057] Regarding the driving method of the transmission screw 102, the tire forming machine is equipped with a drive motor. When the bonding drum is mounted on the equipment, the drive motor is used to rotate the transmission screw 102. The end face of the rotating part 4011 has a protruding snap-fit ​​part 4013, which is used to snap-fit ​​with the drive motor of the tire forming machine. The drive motor is snap-fitted with the drive motor of the tire forming machine through the protruding snap-fit ​​part 4013 on the end face of the rotating part 4011. The snap-fit ​​part 4013 is arranged in four sets at equal angular intervals along the axis of the rotating part 4011 to ensure that the force on the transmission screw 102 is evenly distributed, reducing equipment wear and failure caused by uneven force. Secondly, the snap-fit ​​part 4013 is arranged at equal angular intervals along the axis of the rotating part 4011, which makes the connection and disassembly of the transmission screw 102 and the drive motor more convenient and helps to improve work efficiency.

[0058] To improve the connection stability between the positioning gear 401 and the transmission screw 102, and to prevent the key connection between the inner wall of the positioning gear 401 and the outer wall of the transmission screw 102 from being subjected to excessive force and breaking, a threaded hole is provided on the end face of the transmission screw 102, and a through hole 4014 is provided on the end face of the rotating part 4011. A screw is threaded through the through hole 4014 and threadedly connected to the threaded hole to fix the part.

[0059] In terms of the structural arrangement of the positioning component 4, the main shaft 1 has a connecting hole 1012 facing the positioning toothed wheel 401. The locking toothed block 403 slides on the inner wall of the connecting hole 1012. The fixed end of the positioning cylinder 402 is connected to the guide plate 104, and the movable end of the positioning cylinder 402 is connected to the locking toothed block, thereby improving the accuracy of the sliding of the locking toothed block and making the locking toothed block and the positioning toothed wheel 401 precisely aligned, thereby locking the transmission screw 102.

[0060] To further enhance the locking force of the positioning component 4 on the transmission screw 102 and reduce the force concentration on a single positioning component 4, which could lead to slippage of the positioning gear 401 and / or locking block 403, the positioning component 4 is provided with at least two sets. The two sets of positioning components 4 are arranged opposite each other and located on the same diameter direction of the positioning gear 401. The angle between the axis of the positioning gear 401 of one set of positioning components 4 and the axis of the positioning gear 401 of the other set of positioning components 4 is 180°, thereby improving the uniformity of force distribution.

[0061] In the specific structure of the drum tile assembly 3, the drum tile assembly 3 includes a tile block 301 and a slider 302. The slider 302 is slidably assembled between two sets of guide discs 104. The inward end of the slider 302 abuts against the cone 2. When the cone 2 slides along the axial direction of the main shaft 1, it pushes the slider 302 to move radially along the main shaft 1. The outward end of the slider 302 is connected to the tile block 301 by screws. The slider 302 is slidably assembled between two sets of guide discs 104, which ensures the precise movement of the drum tile assembly 3 in the axial direction of the main shaft 1, thereby improving the processing accuracy and consistency of the fitted drum.

[0062] The tire is circular in shape. In order to fit the outline of the drum to be close to a circle and to achieve the expansion and contraction of the drum, in addition to the outer surface design of the pad 301 needing to be designed in accordance with the curvature of the tire's circle, multiple sets of drum pad assemblies 3 are provided. Multiple sets of drum pad assemblies 3 are arranged at equal angular intervals along the axis of the main shaft 1 between the two sets of guide discs 104. There are N sets of drum pad assemblies 3, where N is an even number and divisible by 4. Preferably, N=24 sets. Of course, the more drum pad assemblies 3 there are, the closer the outline of the drum is to a circle. The arrangement of multiple sets of drum pad assemblies 3 at equal angular intervals along the axis of the main shaft 1 can better simulate the circular outline of the tire, improve the bonding accuracy between the tire rubber and the drum, and thus reduce deviations in the tire molding process. By increasing the number of drum pad assemblies 3, especially the design where N is an even number and divisible by 4, such as N=24 sets, it can better adapt to the expansion and contraction of the tire, which helps to improve the uniformity of tire molding and reduce the stress concentration inside the tire rubber when it expands.

[0063] To address the issue of the large weight of giant tires making it difficult to slide them off the mating drum, this embodiment also includes a rolling assembly 5 for rolling the tire. The rolling assembly 5 includes a roller 501 and a bracket 502. The bracket 502 is connected between two sets of guide discs 104, parallel to the axis of the main shaft 1. The roller 501 is rotatably assembled with the bracket 502, and the axis of rotation of the roller 501 is arranged radially parallel to the main shaft 1. When the mating drum assembly 3 is in a retracted state, the roller 501 is exposed on the outer surface of the mating drum 301. When the mating drum assembly 3 is in an expanded state, the roller... 501 is concealed within the inner surface of the tile 301. The rolling assembly 5 rolls the tire material, reducing the resistance to pushing the tire blank away from the bonding drum and reducing friction and damage to the tire blank surface during movement, thus helping to maintain the quality and integrity of the tire surface. Secondly, the bracket 502 also plays a role in improving the rigidity between the guide discs 104, supporting the two sets of guide discs 104. Since this position is where the tire rubber is applied, it bears a large force, effectively preventing deformation caused by the large force, and ensuring the operational stability and reliability of the bonding drum.

[0064] To further improve the smoothness of the tire blank's sliding off the bonding drum, the rolling assembly 5 is equipped with multiple sets of rollers 501, which are equidistantly spaced parallel to the axis of the main shaft 1. It should be noted that the rollers 501 can be formed by multiple sets of bearings mounted on the rotating shaft. The equidistant arrangement of the multiple sets of rollers 501 parallel to the axis of the main shaft 1 ensures smoother sliding of the tire blank off the bonding drum, reduces friction and resistance, and improves production efficiency.

[0065] When the drum assembly 3 is in the expanded state, there is a gap between two adjacent sets of tiles 301. This gap is to allow for clearance when the drum assembly 3 is in the contracted state, ensuring no interference between adjacent sets of tiles 301. However, this structure can cause the tire rubber to be lowered after the tire is attached to the drum and expanded, resulting in the tire not being a complete circle but having a convex shape inside. To solve this problem, a first engaging portion 3011 and a second engaging portion 3012 are provided at both ends of the tile 301 perpendicular to the guide disc 104. Both the first engaging portion 3011 and the second engaging portion 3012 are protrusions arranged at equal intervals to form a protrusion group. The difference between the second engaging portion 3012 and the second engaging portion 3012 lies in the size and spacing of the protrusions. When the drum assembly 3 is in the contracted state, the first engaging portion 3011 of any set of tiles 301 and the second engaging portion 3012 of an adjacent set of tiles 301... In the engaged state, the tire bearing assembly 3 contracts and avoids collisions. When the tire bearing assembly 3 is in the expanded state, the first engaging part 3011 of any group of bearing blocks 301 and the second engaging part 3012 of the adjacent group of bearing blocks 301 are staggered, providing support for the tire rubber and preventing the tire rubber from sinking. Of course, by increasing the number of protrusions in the first engaging part 3011 and the second engaging part 3012, the gap between the two adjacent groups of protrusions is reduced, thereby further increasing the contact area with the tire rubber and improving the tire's processing quality. Through the engagement and staggered arrangement of the first engaging part 3011 and the second engaging part 3012, the tire bearing assembly 3 is expanded, providing support for the tire rubber, increasing the contact area with the tire rubber, preventing the tire rubber from sinking, ensuring that there are no protruding shapes inside the tire, and making the tire more uniform. Secondly, the arrangement design of the protrusion group simplifies the structure, reduces the complexity of manufacturing and maintenance, and improves reliability.

[0066] To ensure the support of the tire rubber by the bearing assembly 3 and to allow the roller 501 to be properly exposed on the outer surface of the bearing block 301 when the bearing assembly 3 is retracted, the first engagement part 3011 avoids the roller 501. That is, in the normally equidistant arrangement of protrusions, the middle protrusion between every three groups of protrusions is cut off. Thus, when the bearing assembly 3 is retracted, when the first engagement part 3011 and the second engagement part 3012 are engaged, there is an avoidance space 3013, allowing the roller 501 to be properly exposed. Of course, the outer diameter of the roller 501 needs to be designed to match the width of the protrusions, so as to ensure that the roller 501 is properly exposed without sacrificing too much contact area with the tire. It should be noted that when the size of one group of protrusions in the first engagement part 3011 is insufficient for the roller 501 to extend normally, the middle two groups of protrusions between every four groups of protrusions can be cut off, and the second engagement part 3012 needs to make corresponding cuts to avoid the roller.

[0067] After ensuring that the tile 301 avoids the roller 501, there is still sufficient support area. Another implementation method is to cut away the protrusion in the first engagement portion 3011 of the corresponding tile 301 in the area where the roller 501 assembly is located. This reduces the contact area between other tiles 301 and the tire rubber. However, this method requires marking the tiles 301 during assembly to avoid misassembly. A further solution includes a door panel for covering the avoidance space 3013, which is not shown in the figure. The door panel and... The tile 301 is connected by hinges, and the opening angle of the door panel is less than 90°, allowing the door panel to retract automatically after opening. Alternatively, a torsion spring can be used, fitted between the door panel and the tile 301, to achieve a normally closed door panel. When the door panel is closed, it is flush with the outer surface of the tile 301. At this time, when the tile assembly 3 is in the expanded state, the door panel fills the gap in the clearance space 3013 of the tile 301, providing support for the tire rubber. When the tile assembly 3 is in the retracted state, the roller 501 overcomes the elasticity of the torsion spring and pushes open the door panel, allowing... With roller 501 exposed, it should be noted that when the door panel is in the open state, the distance between the top surface of the door panel and the tile 301 is less than the distance between the top surface of roller 501 and the tile 301. This avoids the door panel being pushed open and scratching the inner wall of the tire. The door panel design prevents the tile 301 from interfering with the roller 501 when the drum assembly 3 retracts, reducing potential equipment failures or safety accidents caused by misinstallation or incorrect installation of the tile 301. Secondly, the opening and closing design of the door panel allows for flexible operation in the expansion and contraction states of the drum assembly 3. The adjustment provides support for the tire rubber and ensures that the roller 501 can be properly exposed when needed. The supporting role of the door panel in the expanded state of the drum assembly 3 ensures that the tire rubber has sufficient contact area, avoiding internal bulging or deformation of the tire due to insufficient support area, thus improving tire quality. Furthermore, the normally closed design of the door panel is achieved through a torsion spring, reducing the workload of operators. When the door panel is closed, it is flush with the outer surface of the tile 301, eliminating the need for additional marking or inspection and improving production efficiency.

[0068] The arrangement of roller 501 assemblies affects the support for the tire blank and whether the tire blank can be fed smoothly. Therefore, the number and arrangement angle of roller 501 assemblies need to be designed. At least three sets of roller 501 assemblies are provided, and multiple sets of roller 501 assemblies are arranged at equal angular intervals along the axis of the main shaft 1. The included angle between the first set of roller 501 assemblies and the last set of roller 501 assemblies is angle α. Angle α < 180°. When angle α ≥ 180°, it exceeds the radius of the bonding drum. There is a risk of the tire blank getting stuck when it is pushed out of the bonding drum. The roller 501 assembly is arranged at equal angles along the axis of the main shaft 1 to ensure that the roller 501 assembly can provide uniform support for the tire blank when it is pushed out of the bonding drum when the bonding drum shrinks. This reduces the risk of tire blank deformation and getting stuck, and allows the tire blank to slide out of the bonding drum smoothly, improving the feeding efficiency and reducing the pause and waiting time. By controlling the included angle α to be less than 180°, the risk of the tire blank getting stuck when it is pushed out can be effectively avoided.

[0069] This embodiment provides a number and setting angle of roller 501 components. There are four sets of roller 501 components, and the four sets of roller 501 components are set at equal angular intervals. The included angle α between the first set of roller 501 components and the third set of roller 501 components is 135°, and the included angle between two adjacent sets of roller 501 components is 45°, which facilitates the ejection of the tire while ensuring tire support.

[0070] To meet the demands of extreme conditions, giant tires incorporate steel wire rings within the tire rubber, increasing its weight and making it prone to detaching from the bonding drum after application. To enhance the adhesion between the tire rubber and the bonding drum and address the issue of the tire rubber easily slipping off the drum's bearings, making it difficult to completely adhere the tire rubber to the outer ring wall of the drum, this embodiment also includes a magnet and a cover plate. A storage groove 6 for holding the magnet is formed on the inner surface of the bearing 301. The cover plate is screwed to the bearing 301 and fits over the storage groove 6. The use of the magnet increases the adhesion between the tire rubber and the bonding drum, ensuring the tire rubber adheres securely to the drum. The adhesive can adhere completely to the outer ring wall of the bonding drum, improving the bonding quality. Both the tile 301 and the cover plate are made of aluminum alloy, which avoids the entire tile 301 being magnetized, causing the tile 301 to be adsorbed on the guide plate 104 and difficult to push, thus ensuring the normal operation of the equipment. Before the tire rubber is applied, the transmission screw 102 rotates and the cone 2 moves to the right, so that the drum tile assembly 3 first expands to the position where the tile 301 is higher than the outer surface of the roller 501. When the tire rubber is wrapped around the bonding drum, the transmission screw 102 rotates, so that the cone 2 moves further to the right, expanding the tire rubber wrapped around the bonding drum to the preset diameter.

[0071] The storage tank 6 is provided in multiple sets and arranged in at least two rows. Each row contains five sets of storage tanks 6 and is arranged at equal intervals parallel to the axis of the main shaft 1 to form a set of storage tanks 6. The two sets of storage tanks 6 are located on the slider 302 and the two sides respectively, to ensure that the magnetic blocks are more evenly distributed on the tile 301, thereby improving the adhesion between the tire rubber and the bonding drum.

[0072] In order to make the tire rubber adhere better to the tile 301, the outer surface of the tile 301 is often sandblasted to improve the friction between the outer surface of the tile 301 and the tire rubber.

[0073] Regarding the specific arrangement of the magnet blocks, the tile 301 is provided with multiple sets of magnet blocks to form a magnet block group. These multiple sets of magnet blocks are arranged at equal angular intervals along the axis of the main shaft 1. The included angle between the first and last sets of magnet blocks is angle b, which is less than 180°. The angle bisector of angle b coincides with the angle bisector of angle a. Preferably, angle b is 90°. When there are 24 sets of magnet blocks in the tile 301, arranged in 7 consecutive sets, the uniformity of the adsorption force distribution is improved. The multiple sets of magnet blocks arranged at equal angular intervals along the axis of the main shaft 1 ensure a uniform distribution of the adsorption force, avoiding excessive concentration of adsorption force. The coincidence of the angle bisector of angle b with the angle bisector of angle a facilitates setting the origin position of the bonding drum.

[0074] To improve the smoothness of sliding of slider 302 and optimize the force during the movement of cone 2, an inclined part 3021 is provided at the end of slider 302 that abuts against cone 2. Inclined part 3021 is parallel to the conical surface of cone 2. The angle between inclined part 3021 and tile 301 is angle c, which is 30°~34°, preferably 34°. The taper of cone 2 is equal to twice the angle c. The angle c affects the ratio of axial movement of cone 2 to radial movement of slider 302. Because the weight of tile 301 used to process giant tires is much greater than that of tile 301 used to process conventional tires, by setting angle c, the force required for cone 2 to push slider 302 is reduced when cone 2 pushes slider 302, thereby reducing energy consumption.

[0075] Because the tile 301 is heavy, in order to improve the smoothness and stability of the movement of the drum tile assembly 3, two sets of cones 2 are provided. The two sets of cones 2 are coaxially assembled on the main shaft 1 and arranged front and back. Correspondingly, the slider 302 is provided with two sets of inclined parts 3021 to accommodate the two sets of cones 2.

[0076] To further reduce the resistance of the slider 302's movement and improve the smoothness of the drum tile assembly 3's movement, the inclined part 3021 and the cone 2 are slidably connected by the slide rail slider 302. The slider 302 is connected to the cone 2, and the slide rail is connected to the inclined part 3021. The slider 302 and the guide plate 104 are slidably connected by the slide rail slider 302. The slide rail is connected to the inner surface of the guide plate 104 and the end face of the slider 302.

[0077] Because the bonding drum is large in volume and subjected to great forces from the giant tire, it is necessary to improve the structural rigidity of the bonding drum. This embodiment also includes reinforcing ribs 7, with both ends of the reinforcing ribs 7 connected to one set of guide discs 104 and another set of guide discs 104, respectively. Preferably, multiple sets of reinforcing ribs 7 are provided to further improve the structural rigidity of the bonding drum, maintain the flatness and precision of the drum surface, increase the structural stability of the bonding drum, reduce drum displacement or damage caused by vibration or impact, and ensure the precision and consistency in the tire manufacturing process. This is crucial for ensuring tire quality and production efficiency.

[0078] To detect the sliding distance of the cone 2, this embodiment also includes a sensing ring 8. The guide plate 104 has a connecting hole, and the sensing ring 8 is connected to the cone 2 through the connecting hole via a connecting rod. The sensing ring 8 is exposed on the outside of the guide plate 104. The moving distance of the sensing ring 8 is detected by the sensor connected to the device, thereby determining the moving distance of the cone 2. By converting the included angle c, the expansion distance of the drum assembly 3 is calculated, thereby accurately controlling the expansion inner diameter of the tire.

[0079] To further control the movement distance of the cone 2, this embodiment also includes a threaded rod 9. The cone 2 moves toward a guide plate 104, causing the drum assembly 3 to expand. This guide plate 104 is defined as the right guide plate 104. The guide plate 104 has a threaded hole. A screw is threadedly connected to the threaded hole and passes through the guide plate 104 to abut against the cone 2. The screw is adjustable and fixed to the guide plate 104 by a double nut thread. By rotating the threaded rod 9, the abutment position between the threaded rod 9 and the cone 2 can be adjusted, thereby precisely controlling the movement distance of the cone 2. This allows for the adjustment of the movement distance of the cone 2 when producing tires of different specifications with minor size adjustments, to adapt to the manufacturing needs of tires with different inner diameters and meet the diversification of market demands.

[0080] Example 2: As Figure 1-16 As shown, a processing method for forming giant tires includes a bonding drum for forming giant tires and its processing method as described in Example 1, comprising the following steps:

[0081] S1. Set the origin of the bonding drum: Mount the bonding drum on the tire forming machine, and set the position where the angle bisector of the included angle α is perpendicular to the bottom surface as the origin of the bonding drum.

[0082] S2. Applying adhesive to the bonding drum: The tire rubber is applied from the origin position. The tire forming machine rotates its main shaft, and after the bonding drum rotates 360°, the tire rubber is wrapped around the drum tile assembly. Of course, depending on the processing technology, the bonding drum can rotate multiple times to wrap multiple layers of tire rubber, but it must be an integer multiple of 360°. Magnetic blocks attract the tire rubber to prevent it from falling off the tile during the rotation of the bonding drum. Meanwhile, the tire forming machine's drive motor rotates the drive screw clockwise, and the cone moves to the right, causing the drum tile assembly to expand until the tile is higher than the outer surface of the roller.

[0083] S3. Drum Expansion: The drive motor of the tire forming machine rotates the drive screw clockwise, the cone moves to the right, the drum assembly expands, and the tire rubber expands to the preset diameter; the drum assembly expands further on the basis of the expansion in S2, which can be achieved by using screw drive;

[0084] S4. Adhesion Drum Expansion and Maintenance: The positioning cylinder pushes the locking tooth block to move towards the positioning tooth wheel, locking the transmission screw and fixing the expansion diameter of the adhesion drum for adhesive bonding and forming the tire blank; the positioning component locks the transmission screw, which on the one hand ensures that the expansion diameter of the adhesion drum is maintained, so that the expansion diameter of the tire rubber conforms to the preset diameter and meets the tire size design requirements, and on the other hand, prevents the force of the tire rubber from being transmitted to the drive motor through the screw, which could cause damage to the drive motor due to stress.

[0085] S5. Drum Shrinkage: The positioning cylinder pushes the locking block away from the positioning wheel, releasing the transmission screw. The drive motor of the tire forming machine rotates the transmission screw counterclockwise, the cone moves to the left, the drum assembly shrinks, and the tire blank moves down under its own weight. The roller supports the tire blank. Of course, the drum assembly shrinks until the pads are lower than the outer surface of the roller, because the smaller the drum assembly shrinks, the easier it is for the tire blank to be removed from the drum.

[0086] S6. Embryo feeding: The embryo is pushed to move along the axis of the bonding drum, and the inner wall of the embryo rolls on the rollers to complete the separation of the embryo from the bonding drum.

[0087] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bonding drum for forming giant tires, comprising a main shaft, a drive screw, a drive nut, and guide discs, wherein the main shaft is cylindrical, the drive screw is rotatably assembled with the main shaft and coaxially arranged, the drive nut is threadedly assembled with the drive screw, two sets of guide discs are provided and respectively assembled at both ends of the main shaft, and the outer ring wall of the main shaft has an elongated hole in the same direction of movement as the drive nut, characterized in that: It also includes a cone, a bearing assembly, a positioning assembly, and a rolling assembly for unloading the rolling tire. The cone is assembled with a transmission nut and slides axially between two sets of guide discs along the main shaft. The bearing assembly is slidably assembled between the two sets of guide discs. When the cone slides, it pushes the bearing assembly to slide radially along the main shaft. The positioning assembly includes a positioning toothed wheel, a positioning cylinder, and a locking tooth block. The positioning toothed wheel is coaxially connected to a transmission lead screw. The positioning cylinder is assembled on the main shaft and is used to push the locking tooth block to move back and forth toward the teeth of the positioning toothed wheel. The bearing assembly includes a bearing and a slider. The slider is slidably assembled between the two sets of guide discs. The inward end of the slider abuts against the cone. When the cone slides axially along the main shaft, it pushes the slider to move radially along the main shaft. The outward end of the slider is connected to the bearing. The rolling assembly includes rollers and a bracket. The bracket is connected between two sets of guide discs, parallel to the axis of the main shaft. The rollers are rotatably assembled with the bracket, and the rollers' axis of rotation is arranged radially parallel to the main shaft. When the tire bearing assembly is in a retracted state, the rollers are exposed on the outer surface of the tire. When the tire bearing assembly is in an expanded state, the rollers are concealed within the inner surface of the tire. The tire has a first engaging portion and a second engaging portion at both ends. When the tire bearing assembly is in a retracted state, the first engaging portion engages with the second engaging portion of an adjacent set of tires. The first engaging portion has clearance space to allow the rollers to be exposed normally. When the tire bearing assembly is in an expanded state, the first engaging portion and the second engaging portion of an adjacent set of tires are staggered, providing support for the tire rubber.

2. The bonding drum for giant tire molding according to claim 1, characterized in that: The inner wall of the positioning toothed wheel is keyed to the outer wall of the transmission lead screw. The positioning toothed wheel has a rotating part protruding along its axial direction, and the rotating part is rotatably assembled with the inner wall of the main shaft.

3. The bonding drum for giant tire molding and its processing method according to claim 2, characterized in that: The main shaft has a connecting hole facing the positioning toothed wheel. The locking toothed block slides on the inner wall of the connecting hole. The fixed end of the positioning cylinder is connected to the guide plate, and the movable end of the positioning cylinder is connected to the locking toothed block. The positioning assembly is provided in at least two sets, and the two sets of positioning assemblies are arranged opposite each other and located in the same diameter direction of the positioning toothed wheel.

4. The bonding drum for giant tire molding according to claim 1, characterized in that: The drum tile assembly is provided in N groups, where N is an even number and divisible by 4.

5. A bonding drum for forming giant tires according to claim 1, characterized in that: The rolling assembly is provided in at least three sets, and the multiple sets of rolling assemblies are arranged at equal angular intervals along the axis of the main shaft. The included angle between the first set of rolling assemblies and the last set of rolling assemblies is included angle α, and included angle α < 180°.

6. A bonding drum for forming giant tires according to claim 5, characterized in that: It also includes a magnet block and a cover plate. The inner surface of the tile has a storage slot for placing the magnet block. The cover plate is screwed to the tile and covers the storage slot. The tile is made of a non-magnetic material.

7. A bonding drum for forming giant tires according to claim 6, characterized in that: The tile is provided with multiple sets of magnet blocks to form a magnet block group. The multiple sets of magnet block groups are arranged at equal angular intervals along the axis of the main shaft. The included angle between the first set of magnet block groups and the last set of magnet block groups is included angle b, which is less than 180°. The angle bisector of included angle b coincides with the angle bisector of included angle a.

8. A bonding drum for forming giant tires according to claim 1, characterized in that: The slider has an inclined part at one end that abuts against the cone. The inclined part is parallel to the cone surface of the cone. The angle between the inclined part and the tile is angle c, which is 30°~34°.

9. A processing method for forming giant tires, characterized in that: The bonding drum for forming giant tires, as described in any one of claims 5-8, comprises the following steps: S1. Set the origin of the bonding drum: Mount the bonding drum on the tire forming machine, and set the position where the angle bisector of the included angle α is perpendicular to the bottom surface as the origin of the bonding drum. S2. Applying adhesive to the bonding drum: The tire rubber is applied from the origin position. The tire forming machine rotates the main shaft, and after the bonding drum rotates 360°, the tire rubber is wrapped around the drum tile assembly of the bonding drum. S3. Blowing drum expansion: The drive motor of the tire forming machine rotates the drive screw clockwise, the cone moves to the right, the drum assembly expands, and the tire rubber expands to the preset diameter; S4. Adhesion drum expansion and retention: The positioning cylinder pushes the locking tooth block to move toward the positioning tooth wheel, locks the transmission screw, fixes the expansion diameter of the adhesion drum, and performs adhesive bonding to form a blank; S5. Drum contraction: The positioning cylinder pushes the locking tooth block away from the positioning tooth wheel, releases the transmission screw, and the transmission motor of the tire forming machine rotates the transmission screw counterclockwise. The cone moves to the left, the drum assembly contracts, and the tire blank moves down under its own weight. The rollers support the tire blank. S6. Embryo feeding: The embryo is pushed to move along the axis of the bonding drum, and the inner wall of the embryo rolls on the rollers to complete the separation of the embryo from the bonding drum.

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