One-step small-diameter fitting forming drum for agricultural tire

Abstract

The utility model provides a one-step method small-diameter fitting forming drum for a farm tire. The one-step method small-diameter fitting forming drum comprises a main shaft assembly; the middle drum assembly is arranged on the outer side of the main shaft assembly in a sleeving mode and is driven by the main shaft assembly to rotate, and the outer surface of the middle drum assembly can expand and contract; the side drum assembly is arranged on the outer side of the main shaft assembly in a sleeving mode and driven by the main shaft assembly to rotate, the side drum assembly is located on the axial side face of the middle drum assembly, the outer surface of the side drum assembly can axially move and be arranged in an expanding and shrinking mode, and when the side drum assembly axially moves, an avoiding area can be formed by the side drum assembly and the middle drum assembly; when the middle drum assembly and / or the side drum assembly expand / shrink, the flush relation between the outer surface of the middle drum assembly and the outer surface of the side drum assembly can be changed; and the locking ring assembly is located between the middle drum assembly and the side drum assembly, and the locking ring assembly is arranged in an expanding and shrinking mode. The agricultural radial tire forming machine solves the problem that an agricultural radial tire forming machine in the prior art is low in automation level.

Description

Technical Field

[0001] The utility model relates to the technical field of tire processing, in particular to a small-diameter bonding forming drum for a tire by a one-step method. Background Art

[0002] At present, agricultural radial tire building machines generally use a two-step small-diameter laminating process to make tires. Specifically, the carcass is applied by a carcass reverse drum for small-diameter laminating. After the laminating is completed, the reverse drum, the capsule seat and the forming machine are used to perform positive and negative laminating operations. After the tire embryo is completed, the tire is further formed by the shaping drum. Due to the low level of automation, there is a lot of manual intervention in the intermediate links, such as material laminating joint intervention, positive rubber material intervention, upper wire ring intervention, etc., and too much manual intervention will reduce the quality and efficiency of the tire. At the same time, since the reverse laminating is carried out under the action of the capsule and the push plate, the capsule is a consumable item and needs to be replaced regularly. There are also problems such as the replacement of materials and specifications is particularly cumbersome, takes a long time, has high labor intensity, and the equipment utilization rate is not high. Utility Model Content

[0003] The main purpose of the utility model is to provide a small-diameter agricultural radial tire one-step bonding forming drum to solve the problem of low automation level of agricultural radial tire forming machines in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a small-diameter bonding molding drum for a farmer's tire is provided, comprising: a main shaft assembly; a middle drum assembly, the middle drum assembly is sleeved on the outside of the main shaft assembly, and rotates under the drive of the main shaft assembly, and the outer surface of the middle drum assembly can be expanded and contracted; a side drum assembly, the side drum assembly is sleeved on the outside of the main shaft assembly, and rotates under the drive of the main shaft assembly, the side drum assembly is located on the axial side of the middle drum assembly, and the outer surface of the side drum assembly can be axially movable and can be expanded and contracted, the side drum assembly can form an avoidance area with the middle drum assembly when it moves axially, and the middle drum assembly and / or the side drum assembly can change the flush relationship between the outer surface of the middle drum assembly and the outer surface of the side drum assembly when they expand and contract; a locking ring assembly, the locking ring assembly is located between the middle drum assembly and the side drum assembly, and the locking ring assembly can be expanded and contracted to lock the steel ring.

[0005] Furthermore, there are multiple side drum assemblies, and side drum assemblies are arranged on both axially opposite sides of the middle drum assembly.

[0006] Furthermore, the middle drum assembly includes: at least one drum tile, which is located at the outermost side of the middle drum assembly in the circumferential direction. When there are multiple drum tiles, each drum tile is arranged in sequence in the circumferential direction and / or axial direction; a drum tile drive assembly, which is drive-connected to the drum tile and drives the drum tile to move radially so that the outer surface of the middle drum assembly can expand and contract radially.

[0007] Furthermore, all drum bearings include a middle bearing and multiple side bearings, side bearings are arranged on both sides of the middle bearing's axial direction, all drum bearing drive assemblies are multiple, and all drum bearing drive assemblies include side bearing drive assemblies and middle bearing drive assemblies, the side bearing drive assemblies are connected to the side bearing drives, and the middle bearing drive assemblies are connected to the middle bearing drives.

[0008] Furthermore, the side shoe drive assembly includes: a side shoe drive member; a first transmission member, which is drivingly connected to the side shoe drive member and moves axially driven by the side shoe drive member, and the first transmission member has a first inclined surface; a second transmission member, which is connected to the inner side of the side shoe, and the second transmission member has a second inclined surface, and the second inclined surface abuts against the first inclined surface. When the first transmission member moves axially, it drives the second transmission member and the side shoe to move radially through the first inclined surface and the second inclined surface.

[0009] Furthermore, the first inclined surface and the second inclined surface are arranged in parallel, and along the expansion direction of the side bushing, the second inclined surface of the second transmission member connected to the side bushing is inclined toward a direction approaching the middle bushing.

[0010] Furthermore, the side drum assembly includes: a side drum pad, which is located at the outermost side of the side drum assembly in the circumferential direction; a pad wall panel; a pad driving component, which is connected to the pad wall panel; a pad cone, which is drivingly connected to the pad driving component and moves axially under the drive of the pad driving component; a pad support block, which is connected to the inner side of the side drum pad, and the pad cone and the pad support block have inclined surfaces abutting against each other, and when the pad cone moves axially, the inclined surfaces drive the pad support block and the side drum pad to expand and contract radially.

[0011] Furthermore, the side drum assembly also includes a side drum seat body, which is sleeved on the outside of the main shaft assembly, and the pad wall plate is axially movably arranged on the side drum seat body to drive the side drum pad to move axially.

[0012] Furthermore, the side drum assembly also includes: an overturning push plate, which is connected to the side drum seat body; an overturning rod, which is movably connected to the overturning push plate, and the end of the overturning rod is provided with a roller for rolling the rubber material. The overturning rod overturns the rubber material under the drive of the overturning push plate.

[0013] Furthermore, the side drum seat body includes: a first seat body portion, which is sleeved on the outside of the main shaft assembly; a second seat body portion, which is axially movably connected to the first seat body portion, and the pad wall panel, the reverse push plate, and the locking ring assembly are all connected to the second seat body portion, and are synchronously axially moved under the drive of the second seat body portion; a side drum driving member, which is connected to the second seat body portion, and drives the second seat body portion to move axially relative to the first seat body portion to change the positional relationship between the side drum assembly and the middle drum assembly.

[0014] Furthermore, the locking ring assembly includes: a locking block piston, which can be axially moved; a locking block, which can be radially moved; a connecting rod, through which the locking block piston and the locking block are connected, and when the locking block piston moves axially, the locking block is driven to move radially through the connecting rod to lock the steel ring; a rubber ring, which is arranged on the axial outer side of the locking block.

[0015] The technical solution of the utility model is applied, by providing a middle drum assembly and a side drum assembly, and both the middle drum assembly and the side drum assembly are arranged in an expandable and contractible manner, so that when the rubber needs to be bonded, no matter the middle drum assembly is in a large diameter state or a small diameter state, the side drum assembly can expand or contract accordingly, so that the outer side surface of the middle drum assembly is flush with the outer side surface of the side drum assembly, thereby achieving the bonding of each rubber in each stage, and when it is necessary to form a height inconsistency, the middle drum assembly or the side drum assembly can also be adjusted to expand and contract accordingly, so that the outer surface of the middle drum assembly is not flush with the outer surface of the side drum assembly. At the same time, the side drum assembly also has an axial movement mode, so that when operations such as forward and reverse packaging are required, the side drum assembly can be axially away from the middle drum assembly, so that a avoidance area is formed between the side drum assembly and the middle drum assembly, and the avoidance area can allow components such as reverse packaging rods and forward packaging fingers to perform forward and reverse packaging operations in this area, thereby achieving forward and reverse packaging operations of the rubber. In addition, the present embodiment is also provided with a locking ring assembly, which can lock the steel ring at the side of the middle drum assembly, thereby ensuring the stability of the locking ring position. The above-mentioned arrangement enables the small-diameter farmer's tire to be processed on the forming drum during processing, such as pasting, locking ring, reverse packaging, re-painting, positive packaging, and forming, thereby achieving the effect of the rubber material being processed on the same forming drum at one time without manual intervention, and the overall automation, realizing the processing technology of the farmer's tire with small diameter pasting in one method, realizing the processing of the small-diameter farmer's tire, and using mechanical reverse packaging instead of capsule reverse packaging, which can increase the cost of replacing the capsule and save maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the small-diameter bonding forming drum of the one-step method for the agricultural tire of the utility model when performing step S1 is shown;

[0018] Figure 2 It shows a schematic structural diagram of a small-diameter laminating forming drum of a farmer tire one-step method when performing step S2;

[0019] Figure 3 It shows a schematic structural diagram of a small-diameter laminating forming drum of a farmer tire one-step method when performing step S3;

[0020] Figure 4 It shows a schematic structural diagram of a small-diameter bonding forming drum of a farmer tire one-step method when performing step S4;

[0021] Figure 5 It shows a schematic structural diagram of a small-diameter bonding forming drum of a farmer tire one-step method when performing step S5;

[0022] Figure 6 It shows a schematic structural diagram of a small-diameter laminating forming drum of a farmer tire one-step method when performing step S6;

[0023] Figure 7 It shows a schematic structural diagram of a small-diameter laminating forming drum of a farmer tire one-step method when performing step S7;

[0024] Figure 8 It shows a schematic structural diagram of a small-diameter bonding forming drum of a farmer tire one-step method when performing step S8;

[0025] Fig. 9 The schematic diagram of the structure of the small-diameter bonding molding drum of the farmer tire one-step method when performing step S9 is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Spindle assembly; 20. Middle drum assembly; 21. Middle bushing; 22. Side bushing; 23. Side bushing drive assembly; 231. Side bushing drive member; 232. First transmission member; 233. Second transmission member; 24. Middle bushing drive assembly; 30. Side drum assembly; 31. Side drum pad; 32. Pad wall panel; 33. Pad driving member; 34. Pad cone; 35. Pad supporting block; 36. Turn-up push plate; 37. Turn-up rod; 38. First seat body; 39. Second seat body; 310. Side drum drive member; 40. Locking ring assembly; 41. Locking block piston; 42. Locking block; 43. Connecting rod; 44. Rubber ring. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem of low automation level of agricultural radial tire molding machines in the prior art, the utility model provides a small-diameter bonding molding drum for agricultural radial tires in one step.

[0032] like Figures 1 to 9 The shown one-step small-diameter bonding forming drum for farmer's tires comprises a main shaft assembly 10, a middle drum assembly 20, a side drum assembly 30 and a locking ring assembly 40. The middle drum assembly 20 is sleeved on the outside of the main shaft assembly 10 and rotates under the drive of the main shaft assembly 10. The outer surface of the middle drum assembly 20 can be expanded and contracted. The side drum assembly 30 is sleeved on the outside of the main shaft assembly 10 and rotates under the drive of the main shaft assembly 10. The side drum assembly 30 is located on the axial side of the middle drum assembly 20, and the outer surface of the side drum assembly 30 can be axially movable and can be expanded and contracted. When the side drum assembly 30 moves axially, it can form an avoidance area with the middle drum assembly 20. When the middle drum assembly 20 and / or the side drum assembly 30 expand and contract, it can change the flush relationship between the outer surface of the middle drum assembly 20 and the outer surface of the side drum assembly 30. The locking ring assembly 40 is located between the middle drum assembly 20 and the side drum assembly 30. The locking ring assembly 40 can be expanded and contracted to lock the steel ring.

[0033] In this embodiment, a middle drum assembly 20 and a side drum assembly 30 are provided, and both the middle drum assembly 20 and the side drum assembly 30 are arranged in an expandable and contractible manner. In this way, when it is necessary to bond the rubber material, no matter the middle drum assembly 20 is in a large-diameter state or a small-diameter state, the side drum assembly 30 can expand or contract accordingly, so that the outer side surface of the middle drum assembly 20 is flush with the outer side surface of the side drum assembly 30, thereby achieving the bonding of each rubber material in each stage, and when it is necessary to form a height inconsistency, the middle drum assembly 20 or the side drum assembly 30 can also be adjusted to expand and contract accordingly, so that the outer surface of the middle drum assembly 20 is not flush with the outer surface of the side drum assembly 30. At the same time, the side drum assembly 30 also has an axial movement mode, so that when operations such as positive and negative packaging are required, the side drum assembly 30 can be axially away from the middle drum assembly 20, so that a avoidance area is formed between the side drum assembly 30 and the middle drum assembly 20, and the avoidance area can make the reverse packaging rod 37, the positive packaging finger and other components perform positive and negative packaging operations in this area, thereby realizing the positive and negative packaging operations of the rubber material. In addition, the present embodiment is also provided with a locking ring assembly 40, which can lock the steel ring at the side of the middle drum assembly 20, thereby ensuring the stability of the locking ring position. The above-mentioned setting mode enables the small-diameter farmer tire to be processed on the forming drum during processing, such as pasting, locking ring, reverse packaging, re-painting, positive packaging, and forming, so that the rubber material can be processed on the same forming drum at one time without manual intervention, and the overall effect can be automatically performed, realizing the processing technology of small-diameter pasting of the farmer tire in one method, realizing the processing of small-diameter farmer tires, and using mechanical reverse packaging instead of capsule reverse packaging can increase the cost of replacing capsules and save maintenance time.

[0034] It should be noted that the axial, circumferential and radial directions mentioned in this embodiment are all in the direction of the entire forming drum, that is, the direction of the main shaft assembly 10. At the same time, the expansion refers to radial displacement, and the contraction refers to radial contraction except for the contraction of the flat width. The contraction of the flat width refers to the axial contraction of the component to change the axial length.

[0035] In this embodiment, there are multiple side drum assemblies 30, and side drum assemblies 30 are provided on both sides of the middle drum assembly 20 that are axially opposite to each other. In this embodiment, two side drum assemblies 30 are provided, and the two side drum assemblies 30 are respectively located on both sides of the middle drum assembly 20 in the axial direction, and the middle drum assemblies 20 on both sides are synchronously operated, so that the positive and negative wrapping operations on both sides can be synchronously avoided, and the overall adhesion of the rubber material can be ensured at the same time.

[0036] In this embodiment, the middle drum assembly 20 includes at least one drum tile and a drum tile driving assembly. The drum tile is located at the outermost side of the middle drum assembly 20 in the circumferential direction, and the innermost rubber material is attached to the drum tile surface. The number of drum tiles can be set as needed. In this embodiment, a plurality of drum tiles are provided, and each drum tile is arranged in sequence in the circumferential direction and / or axial direction. It should be noted that the drum tile adopts a multi-piece structure, and some drum tiles are arranged circumferentially to form an annular structure. The expansion and contraction of the annular structure can realize the expansion and contraction of the middle drum assembly 20, while the other part of the drum tiles can be arranged axially, so that the middle drum assembly 20 has a certain length. Of course, the above-mentioned setting method can be adjusted. For example, the length of the drum tile itself is relatively long, so that only one drum tile is arranged in the axial direction. The drum tile driving assembly is connected to the drum tile driving, and the drum tile driving assembly is used to drive the drum tile to move radially, so that the outer surface of the middle drum assembly 20 expands and contracts radially as needed, thereby realizing the cooperation with the side drum assembly 30 and realizing various processing.

[0037] like Figure 2 As shown, in this embodiment, all drum tiles include a middle tile 21 and a plurality of side tiles 22, and side tiles 22 are arranged on both sides of the middle tile 21 in the axial direction, so that the middle tile 21 and the side tiles 22 together form the outer surface of the middle drum assembly 20. The reason for this arrangement is that the diameter of the middle tile 21 needs to be smaller than that of the side tiles 22 during some processing, so this arrangement is adopted to meet the processing requirements. Similar to the arrangement of drum tiles, all drum tile drive assemblies are multiple, and all drum tile drive assemblies include a side tile drive assembly 23 and a middle tile drive assembly 24, wherein the side tile drive assembly 23 is drivingly connected to the side tile 22, and the middle tile drive assembly 24 is drivingly connected to the middle tile 21, thereby realizing the expansion and contraction movement of the side tile 22 and the middle tile 21.

[0038] The middle bushing driving assembly 24 of this embodiment adopts a cylinder, and the cylinder rod of the cylinder is connected to the middle bushing 21, so that the middle bushing 21 can be directly driven to move radially to achieve the expansion and contraction of the middle bushing 21.

[0039] Unlike the above-mentioned middle shoe drive assembly 24, the side shoe drive assembly 23 of this embodiment includes a side shoe drive member 231, a first transmission member 232 and a second transmission member 233. The side shoe drive member 231 can still use a cylinder. The first transmission member 232 is driven and connected to the side shoe drive member 231, and moves axially under the drive of the side shoe drive member 231. The first transmission member 232 has a first inclined surface, and the second transmission member 233 is connected to the inner side of the side shoe 22. The second transmission member 233 has a second inclined surface, and the second inclined surface abuts against the first inclined surface. Components such as a slide rail assembly can be arranged between the two as needed. In this way, the first transmission member 232 and the second transmission frame are in a wedge-shaped structure that cooperates with each other. When the first transmission member 232 moves axially under the drive of the side shoe drive member 231, the extrusion fit between the first inclined surface and the second inclined surface can achieve the effect of driving the second transmission member 233 and the side shoe 22 to move radially, thereby realizing the expansion and contraction of the side shoe 22.

[0040] In this embodiment, the first inclined surface and the second inclined surface are arranged in parallel, and along the expansion direction of the side tile 22, the second inclined surface of the second transmission member 233 connected to the side tile 22 is inclined in the direction close to the middle tile 21. In this way, when the first transmission members 232 on both sides approach each other, the two second transmission members 233 and the side tiles 22 on them can expand, and when the first transmission members 232 move away from each other, the second transmission members 233 and the side tiles 22 on them can shrink. Of course, the specific structure of the middle drum assembly 20 is not limited to the above-mentioned setting mode of this embodiment, and it can also adopt other structures to achieve the above-mentioned movement of this embodiment as needed.

[0041] like Figures 4 to 7 As shown, in the present embodiment, the side drum assembly 30 comprises a side drum pad 31, a pad wall panel 32, a pad driving member 33, a pad cone 34 and a pad support block 35. The side drum pad 31 is similar to the drum tile and is also located at the outermost side of the side drum assembly 30 in the circumferential direction. The pad driving member 33 can be a cylinder or other component, which is connected to the pad wall panel 32. The pad cone 34 is drivingly connected to the output end of the pad driving member 33. In this way, the pad driving member 33 can drive the pad cone 34 to move axially, and the pad support block 35 can be driven by the pad driving member 33 to move axially. The support block 35 is connected to the inner side of the side drum pad 31, and the pad cone 34 and the pad support block 35 have inclined surfaces abutting against each other. The structural form of the inclined surface is basically the same as the structural form of the first inclined surface and the second inclined surface between the first transmission member 232 and the second transmission member 233. In this way, when the pad cone 34 moves axially driven by the pad driving member 33, the pad support block 35 and the side drum pad 31 can be driven radially by the cooperation between the inclined surfaces, thereby realizing the expansion and contraction of the side drum pad 31.

[0042] In this embodiment, the side drum assembly 30 also includes a side drum seat body, which is sleeved on the outside of the main shaft assembly 10, and the pad wall panel 32 is axially movably arranged on the side drum seat body, so that the movement of the pad wall panel 32 can drive the side drum pad 31 to move axially, thereby realizing the axial movement of the side drum pad 31.

[0043] In this embodiment, the side drum assembly 30 also includes a turn-up push plate 36 and a turn-up rod 37, which form a turn-up assembly, wherein the turn-up push plate 36 is connected to the side drum seat body, one end of the turn-up rod 37 is movably connected to the turn-up push plate 36, and the other end of the turn-up rod 37 is provided with a roller for rolling the rubber material, so that the turn-up rod 37 can rotate and other movements under the drive of the turn-up push plate 36, so that the rubber material can be turned up by the roller at its end. It should be noted that since the turn-up push plate 36 is not connected to the pad wall panel 32, the pad wall panel 32 and the side drum pad 31 can move axially relative to the turn-up rod 37, so that the side drum pad 31 can exit the movement path of the roller to avoid the turn-up action.

[0044] In this embodiment, the side drum seat body includes a first seat body portion 38, a second seat body portion 39 and a side drum driving member 310. The first seat body portion 38 is sleeved on the outer side of the main shaft assembly 10; the second seat body portion 39 is axially movably connected to the first seat body portion 38, and most of the components such as the pad wall plate 32, the reverse package push plate 36, and the lock ring assembly 40 are connected to the second seat body portion 39. In this way, when the second seat body portion 39 moves axially, it can drive most of the components on the side drum assembly 30 including the side drum pad 31 and the reverse package rod 37 to move axially synchronously, thereby realizing the overall movement of the side drum assembly 30. The side drum driving member 310 can be a cylinder or other component, which is connected to the second seat body portion 39 and drives the second seat body portion 39 to move axially relative to the first seat body portion 38, thereby changing the positional relationship between the side drum assembly 30 and the middle drum assembly 20.

[0045] like Figure 3 As shown, the locking ring assembly 40 of this embodiment includes a locking block piston 41, a locking block 42, a connecting rod 43 and a rubber ring 44. The locking block piston 41 can be axially movable; the locking block 42 can be radially movable; the locking block piston 41 and the locking block 42 are connected by a connecting rod 43, and the connecting rod 43 can be a bent rod, so that when the locking block piston 41 moves axially, the locking block 42 can be driven to move radially through the connecting rod 43, thereby achieving the expansion of the locking block 42 and then achieving the effect of locking the steel ring. The rubber ring 44 is arranged on the axial outer side of the locking block 42, which can play a role in avoiding hard contact between the steel ring and the locking block 42.

[0046] like Figures 1 to 9As shown, the present embodiment also provides a small-diameter laminating process for a farmer's tire in one step, adopting the above-mentioned small-diameter laminating forming drum for a farmer's tire in one step, and the small-diameter laminating process for a farmer's tire in one step comprises: step S1: the middle drum assembly 20 is in a small-diameter state, the outer surfaces of the middle drum assembly 20 and the side drum assembly 30 are flush, and the inner liner layer and the carcass layer are laminated; step S2: the steel ring is installed, and the locking ring assembly 40 expands and locks the steel ring; step S3: the middle drum assembly 20 shrinks axially to a flat width, and the middle drum assembly 20 expands to a large-diameter state; step S4: the side drum pad 31 of the side drum assembly 30 moves axially in a direction away from the middle drum assembly 20; step S5: the turn-up rod 37 is actuated to turn up the rubber material; step S6: the turn-up rod 37 is reset, The side drum pad 31 expands to a state flush with the outer surface of the middle drum assembly 20, and fits the cord carcass patch and the sidewall rubber patch; step S7: the side drum pad 31 and the locking ring assembly 40 shrink, and the side drum assembly 30 moves axially away from the middle drum assembly 20 to wrap the rubber; step S8: the side drum pad 31 and the locking ring assembly 40 move toward the middle drum assembly 20, the locking ring assembly 40 locks the steel ring, the middle drum assembly 20 shrinks to a flat width, the tread assembly is attached, and molding is performed; step S9: the side drum pad 31 moves axially toward the middle drum assembly 20 and abuts against the side of the locking ring assembly 40, the middle drum assembly 20 shrinks to a small diameter state, the embryo is removed, and the molding drum returns to its initial state.

[0047] In combination with the specific structure of the aforementioned forming drum,

[0048] In step S2, the steel ring is transferred to both sides of the middle drum assembly 20, and the locking block piston 41 drives the locking block 42 and the rubber ring 44 to expand radially through the connecting rod 43 under the action of air pressure, thereby locking the steel ring.

[0049] In step S3 and step S9, when the middle drum assembly 20 expands or contracts, the middle bearing drive assembly 24 drives the middle bearing 21 to expand or contract radially. At the same time, the side bearing drive member 231 drives the first transmission member 232 to move axially. The first transmission member 232 drives the second transmission member 233 to move radially through the extrusion fit of the first inclined surface and the second inclined surface. The second transmission member 233 drives the side bearing 22 to expand or contract radially, thereby realizing the overall expansion and contraction of the middle drum assembly 20.

[0050] In step S6 and step S7, when the side drum pad 31 expands or contracts, the pad driving member 33 drives the pad cone 34 to move axially, and the pad cone 34 drives the pad support block 35 to move radially through the extrusion fit between the inclined surfaces. The pad support block 35 drives the side drum pad 31 to expand or contract, thereby realizing the expansion and contraction of part of the side drum pad 31.

[0051] In step S4 and step S9, when the side drum pad 31 moves axially, the side drum driving component 310 does not move, and the pad wall panel 32 moves axially relative to the side drum seat body, and the pad wall panel 32 drives the pad driving component 33, the pad cone 34, the pad support block 35 and the side drum pad 31 to move axially together, thereby making the side drum pad 31 move axially. During this process, the turn-up rod 37 will not move axially.

[0052] In step S7 and step S8, when the side drum assembly 30 moves axially, the side drum driving member 310 drives the second seat body portion 39 to move axially relative to the first seat body portion 38, and the second seat body portion 39 drives the pad wall panel 32, the pad driving member 33, the pad cone 34, the pad support block 35 and the side drum pad 31 to move axially together, thereby realizing the overall axial movement of the side drum assembly 30.

[0053] It should be noted that, the multiple in the above embodiments refers to at least two.

[0054] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0055] 1. Solve the problem of low automation level of agricultural radial tire building machines in the prior art;

[0056] 2. The rubber material can be processed on the same forming drum at one time without manual intervention, and the overall process can be automated, so as to realize the processing technology of small-diameter lamination of the tire in one step and the processing of small-diameter tire;

[0057] 3. Using mechanical reverse packing instead of capsule reverse packing can improve the cost of replacing capsules and save maintenance time.

[0058] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A small diameter bonding forming drum for a tire in one step, characterized in that: include: Spindle assembly (10); A middle drum assembly (20), wherein the middle drum assembly (20) is sleeved on the outer side of the main shaft assembly (10) and rotates under the drive of the main shaft assembly (10), and the outer surface of the middle drum assembly (20) can be expanded and contracted; A side drum assembly (30), wherein the side drum assembly (30) is sleeved on the outer side of the main shaft assembly (10) and rotates under the drive of the main shaft assembly (10); the side drum assembly (30) is located on the axial side of the middle drum assembly (20); and the outer surface of the side drum assembly (30) is axially movable and expandable; when the side drum assembly (30) moves axially, it can form an avoidance area with the middle drum assembly (20); when the middle drum assembly (20) and / or the side drum assembly (30) expand or contract, it can change the flush relationship between the outer surface of the middle drum assembly (20) and the outer surface of the side drum assembly (30); A locking ring assembly (40) is located between the middle drum assembly (20) and the side drum assembly (30), and the locking ring assembly (40) can be expanded and contracted to lock the steel ring.

2. The small-diameter bonding forming drum for the tire in one step according to claim 1 is characterized in that: There are a plurality of side drum assemblies (30), and the side drum assemblies (30) are arranged on both axially opposite sides of the middle drum assembly (20).

3. The small-diameter bonding forming drum for the agricultural tire in one-step process according to claim 1 is characterized in that: The middle drum assembly (20) comprises: At least one drum tile, the drum tile being located at the outermost side of the middle drum assembly (20) in the circumferential direction. When there are multiple drum tiles, the drum tiles are arranged sequentially in the circumferential direction and / or axial direction. A drum shoe drive assembly is connected to the drum shoe in driving relation and drives the drum shoe to move radially, so that the outer surface of the middle drum assembly (20) expands and contracts radially.

4. The small-diameter bonding forming drum for the agricultural tire in one-step process according to claim 3 is characterized in that: All of the drum bearings include a center bearing (21) and a plurality of side bearings (22), wherein the side bearings (22) are arranged on both axial sides of the center bearing (21), and all of the drum bearing drive assemblies are multiple, wherein all of the drum bearing drive assemblies include a side bearing drive assembly (23) and a center bearing drive assembly (24), wherein the side bearing drive assembly (23) is drivingly connected to the side bearings (22), and the center bearing drive assembly (24) is drivingly connected to the center bearing (21).

5. The small-diameter bonding forming drum for the agricultural tire in one-step process according to claim 4 is characterized in that: The side shoe drive assembly (23) comprises: Side shoe drive member (231); A first transmission member (232), the first transmission member (232) is drivingly connected to the side shoe driving member (231) and moves axially under the drive of the side shoe driving member (231), and the first transmission member (232) has a first inclined surface; A second transmission member (233), wherein the second transmission member (233) is connected to the inner side of the side bushing (22), and the second transmission member (233) has a second inclined surface, wherein the second inclined surface abuts against the first inclined surface, and when the first transmission member (232) moves axially, the first inclined surface and the second inclined surface drive the second transmission member (233) and the side bushing (22) to move radially.

6. The small-diameter bonding forming drum for the tire in one step according to claim 5 is characterized in that: The first inclined surface and the second inclined surface are arranged in parallel, and along the expansion direction of the side bushing (22), the second inclined surface of the second transmission member (233) connected to the side bushing (22) is inclined in a direction close to the middle bushing (21).

7. The small-diameter bonding forming drum for the agricultural tire in one-step process according to claim 1 is characterized in that: The side drum assembly (30) comprises: A side drum pad (31), wherein the side drum pad (31) is located at the outermost side of the side drum assembly (30) in the circumferential direction; Pad wall panels (32); A pad driving member (33), the pad driving member (33) being connected to the pad wall panel (32); A backing plate frustum (34), the backing plate frustum (34) is drivingly connected to the backing plate driving member (33) and moves axially under the drive of the backing plate driving member (33); A pad support block (35), wherein the pad support block (35) is connected to the inner side of the side drum pad (31); the pad cone (34) and the pad support block (35) have inclined surfaces abutting against each other; when the pad cone (34) moves axially, the inclined surfaces drive the pad support block (35) and the side drum pad (31) to expand and contract radially.

8. The small-diameter bonding forming drum for the one-step method of the tire according to claim 7 is characterized in that: The side drum assembly (30) further comprises a side drum seat body, which is sleeved on the outside of the main shaft assembly (10), and the pad wall plate (32) is axially movably arranged on the side drum seat body to drive the side drum pad plate (31) to move axially.

9. The small-diameter bonding forming drum for a tire by one-step method according to claim 8, characterized in that: The side drum assembly (30) further comprises: An inverted push plate (36), wherein the inverted push plate (36) is connected to the side drum seat body; A turn-up rod (37), wherein the turn-up rod (37) is movably connected to the turn-up push plate (36), and a roller for rolling the rubber material is arranged at the end of the turn-up rod (37). The turn-up rod (37) turns up the rubber material under the drive of the turn-up push plate (36).

10. The small-diameter bonding forming drum for the tire in one step according to claim 9, characterized in that: The side drum seat body comprises: A first seat body (38), wherein the first seat body (38) is sleeved on the outer side of the spindle assembly (10); A second seat body (39), wherein the second seat body (39) is axially movably connected to the first seat body (38), the pad wall plate (32), the reverse push plate (36), and the locking ring assembly (40) are all connected to the second seat body (39) and synchronously move axially under the drive of the second seat body (39); A side drum driving member (310) is connected to the second seat body portion (39) and drives the second seat body portion (39) to move axially relative to the first seat body portion (38) to change the positional relationship between the side drum assembly (30) and the middle drum assembly (20).

11. The small-diameter bonding forming drum for a tire by one-step method according to claim 1, characterized in that: The locking ring assembly (40) comprises: A locking block piston (41), wherein the locking block piston (41) is axially movable; A locking block (42), wherein the locking block (42) is radially movable; A connecting rod (43), wherein the locking block piston (41) and the locking block (42) are connected via the connecting rod (43), and when the locking block piston (41) moves axially, the locking block (42) is driven to move radially via the connecting rod (43) to lock the steel ring; A rubber ring (44), wherein the rubber ring (44) is arranged on the axial outer side surface of the locking block (42).

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