Capsule forming drum

Abstract

The present invention provides a capsule forming drum. The capsule forming drum includes: a main shaft assembly; a middle drum assembly, there are two middle drum assemblies, the two middle drum assemblies are oppositely arranged on the main shaft assembly and can slide axially along the main shaft assembly. The middle drum assembly includes a plurality of shoulders and a plurality of support teeth. The shoulders are arranged at one end where the two middle drum assemblies are close to each other. At least one support tooth is respectively arranged on each shoulder. The support teeth are arranged at one end of the shoulder facing the shoulder of the other middle drum assembly. The plurality of support teeth of the two middle drum assemblies are arranged in a staggered manner; a side drum assembly, there are two side drum assemblies, the two side drum assemblies are respectively oppositely arranged on the two middle drum assemblies and can slide axially along the middle drum assembly, and there are a plurality of locking blocks on one side of the side drum assembly close to the shoulder of the corresponding middle drum assembly; a driving assembly, the driving assembly is respectively connected to the middle drum assembly and the side drum assembly. The present invention solves the problem of poor performance of the light truck capsule forming drum in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of tire production equipment, and more particularly, to a bladder forming drum. Background Art

[0002] Currently, there are two processes for making tires with a light truck bladder forming drum. One is that after the strip material is wound around the bladder forming drum for one week, the tire bead locking, bead turning back and sizing width processes are completed on the same drum. However, the two side drums of this bladder forming drum cannot be opened, and it is not applicable to the process of wrapping the bead with the inner buckle of the tire side. The other is that after the strip material is wound around the bonding drum for one week and the bead turning back and the inner buckle of the tire side are completed, it is switched to the sizing drum for sizing width. This process can realize the process of wrapping the bead with the inner buckle of the tire side, but it is operated on two drums, which is cumbersome and inefficient.

[0003] Therefore, there is a problem of poor performance of the light truck bladder forming drum in the prior art. Summary of the Invention

[0004] The main object of the present invention is to provide a bladder forming drum to solve the problem of poor performance of the light truck bladder forming drum in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a bladder forming drum, including: a main shaft assembly; a middle drum assembly, there are two middle drum assemblies, and the two middle drum assemblies are oppositely arranged on the main shaft assembly and can slide along the axial direction of the main shaft assembly. The middle drum assembly includes a plurality of shoulders and a plurality of support teeth. The shoulders are arranged at one end of the two middle drum assemblies close to each other. At least one support tooth is respectively arranged on each shoulder. The support teeth are arranged at one end of the shoulder facing the shoulder of the other middle drum assembly. The plurality of support teeth of the two middle drum assemblies are staggered. When the two middle drum assemblies move in the direction of approaching each other, the plurality of support teeth of the two middle drum assemblies mesh with each other; a side drum assembly, there are two side drum assemblies, and the two side drum assemblies are respectively oppositely arranged on the two middle drum assemblies and can slide along the axial direction of the middle drum assembly. And a plurality of locking blocks are provided on the side of the side drum assembly close to the shoulder of the corresponding middle drum assembly, and the locking blocks can move in the radial direction of the main shaft assembly; a driving assembly, the driving assembly is respectively connected with the middle drum assembly and the side drum assembly.

[0006] Further, the main shaft assembly includes: a main shaft body, the middle drum assembly is sleeved on the main shaft body and can slide along the main shaft body; a lead screw, the lead screw is rotatably arranged inside the main shaft body, the axial direction of the lead screw is the same as the axial direction of the main shaft body, and at least a part of the middle drum assembly is connected with the lead screw.

[0007] Further, the middle drum assembly further includes: a slider disposed on one side where two middle drum assemblies are away from each other, the slider being threadedly connected to the lead screw and capable of moving along the axial direction of the lead screw; a middle drum body sleeved on the main shaft body, and the middle drum body being connected to the slider; a middle drum connecting sleeve sleeved on the middle drum body and capable of moving along the axial direction of the middle drum body, and one end of the tire shoulder away from the support teeth being connected to one end of the middle drum connecting sleeve away from the slider.

[0008] Further, one end of the middle drum body away from the slider has a limiting baffle extending radially along the main shaft body, and the tire shoulder abuts against the limiting baffle and is capable of sliding along the limiting baffle.

[0009] Further, the middle drum assembly further includes a plurality of connecting rods corresponding to the plurality of tire shoulders one by one. The tire shoulders are connected to the middle drum connecting sleeve through the connecting rods. The connecting rods have an arc segment in the length direction, and the connecting lines of both ends of the connecting rods respectively have an angle greater than zero degrees with the axial direction and the radial direction of the main shaft body.

[0010] Further, one end of the middle drum body close to the slider has a first driving cavity. One end of the middle drum connecting sleeve away from the tire shoulder extends into the first driving cavity. The middle drum assembly further includes a middle drum piston movably disposed in the first driving cavity and connected to the middle drum connecting sleeve. The middle drum piston divides the first driving cavity into a first cavity and a second cavity. The first cavity is relatively farther from the tire shoulder than the second cavity, and the driving assembly can respectively pump air into or exhaust air from the first cavity and the second cavity.

[0011] Further, the side drum assembly includes: a side drum body disposed on the middle drum connecting sleeve and capable of sliding along the middle drum connecting sleeve, and one side of the side drum body close to the tire shoulder has a second driving cavity. At least a part of the locking block is disposed in the second driving cavity, and at least another part of the locking block extends out of the second driving cavity; a side drum guiding block disposed on the side drum body. The middle drum body has a guiding groove extending axially. One end of the side drum guiding block away from the side drum body extends into the guiding groove and slides along the guiding groove.

[0012] Further, the side drum assembly further includes a lifting piston movably disposed in the second driving cavity. One end of the lifting piston close to the locking block has a first guiding inclined surface, and the locking block has a second guiding inclined surface parallel to the first guiding inclined surface. The first guiding inclined surface and the second guiding inclined surface abut against each other, and the distance from the first guiding inclined surface to the axis of the lead screw gradually increases in the direction away from the locking block.

[0013] Further, the lifting piston divides the second driving cavity into two parts. The end of the lifting piston away from the locking block and the second driving cavity enclose a third cavity. The driving assembly can pump air into or exhaust air from the third cavity to drive the lifting piston to move along the axial direction of the lead screw.

[0014] Further, the side drum assembly further includes a plurality of first reset members, which correspond to the plurality of lifting pistons one by one. One end of each first reset member abuts against the end of the corresponding lifting piston close to the locking block, and the other end of each first reset member abuts against the side drum body, so as to provide a reset force for the lifting piston to move away from the locking block.

[0015] Further, one side of the middle drum connecting sleeve facing the side drum body has a first limiting protrusion arranged circumferentially, and one side of the side drum body facing the middle drum connecting sleeve has a second limiting protrusion arranged circumferentially. The first limiting protrusion, the second limiting protrusion, the middle drum connecting sleeve and the side drum body enclose a fourth cavity, and the second limiting protrusion, the middle drum connecting sleeve, the side drum body and the middle drum body enclose a fifth cavity. The driving assembly can respectively evacuate or inflate the fourth cavity and the fifth cavity, and the sum of the volumes of the fourth cavity and the fifth cavity remains unchanged.

[0016] Further, the side drum assembly further includes an anti-package capsule, which is arranged around the circumferential outer wall of the side drum body and is connected to the locking block. The circumferential outer wall of the side drum body covered by the anti-package capsule has a sixth cavity, and the driving assembly can evacuate or inflate the sixth cavity.

[0017] Further, the side drum assembly further includes a second reset member, which is annular and sleeved on the outer peripheral side of the side drum body, and is located between the anti-package capsule and the plurality of locking blocks, so as to provide a reset force for the locking block to move towards the main shaft assembly.

[0018] Applying the technical solution of the present invention, the capsule forming drum in the present application includes a main shaft assembly, a middle drum assembly, a side drum assembly and a driving assembly. There are two middle drum assemblies, which are oppositely arranged on the main shaft assembly and can slide along the axial direction of the main shaft assembly. The middle drum assembly includes a plurality of shoulders and a plurality of support teeth. The shoulders are arranged at one end of the two middle drum assemblies close to each other. At least one support tooth is respectively arranged on each shoulder. The support teeth are arranged at one end of the shoulder facing the shoulder of the other middle drum assembly. The plurality of support teeth of the two middle drum assemblies are arranged in a staggered manner. When the two middle drum assemblies move towards each other, the plurality of support teeth of the two middle drum assemblies mesh with each other; there are two side drum assemblies, which are respectively oppositely arranged on the two middle drum assemblies and can slide along the axial direction of the middle drum assembly, and a plurality of locking blocks are arranged on one side of the side drum assembly close to the shoulder of the corresponding middle drum assembly. The locking blocks can move radially along the main shaft assembly; the driving assembly is respectively connected to the middle drum assembly and the side drum assembly.

[0019] When using the capsule forming drum in this application, since the driving component is respectively connected to the middle drum component and the side drum component, at least a part of the middle drum component can be driven by the driving component to move axially along the main shaft component relative to the main shaft component. At the same time, the side drum component is driven by the driving component to move axially along the middle drum component relative to the middle drum component and drive the cord width to move radially along the main shaft component. Thus, operations such as pasting materials, reverse wrapping the Thai boxing, inner buckling of the tire side including the bead, pasting the crown, and over-sizing can be completed through the movements of the middle drum component, the side drum component, and the locking block. Therefore, the capsule forming drum in this application effectively solves the problem of poor performance of the light truck capsule forming drum in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 Shows a schematic structural diagram of a capsule forming drum according to a specific embodiment of the present invention;

[0022] Figure 2 Shows a schematic internal structure diagram of the capsule forming drum in a flat width state;

[0023] Figure 3 Shows a schematic structural diagram of the capsule forming drum after reverse wrapping the bead is completed;

[0024] Figure 4 Shows a schematic structural diagram of the capsule forming drum after the inner buckling of the tire side wraps the bead.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 1, middle drum component; 2, side drum component; 3, main shaft component; 4, intermediate rubber strip; 5, support tooth; 6, tire shoulder; 7, connecting rod; 8, middle drum connecting sleeve; 9, middle drum body; 10, middle drum piston; 11, slider; 12, locking block; 13, lifting piston; 14, side drum body; 15, side drum guide block; 16, reverse wrapping capsule; 20, first cavity; 21, second cavity; 22, third cavity; 23, fourth cavity; 24, fifth cavity; 25, sixth cavity; 31, main shaft body; 32, lead screw; 33, limit baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application pertains.

[0029] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer with respect to the contours of the respective components themselves, but the above orientation terms are not used to limit the present invention.

[0030] In order to solve the problem of poor performance of light truck capsule forming drums in the prior art, this application provides a capsule forming drum.

[0031] It should be noted that the capsule forming drums in the following embodiments of this application generally refer to light truck capsule forming drums.

[0032] As Figures 1 to 4 shown, the capsule forming drum in this application includes a main shaft assembly 3, a middle drum assembly 1, side drum assemblies 2 and a driving assembly. There are two middle drum assemblies 1, and the two middle drum assemblies 1 are oppositely arranged on the main shaft assembly 3 and can slide along the axial direction of the main shaft assembly 3. The middle drum assembly 1 includes a plurality of shoulders 6 and a plurality of support teeth 5. The shoulders 6 are arranged at one end where the two middle drum assemblies 1 are close to each other. At least one support tooth 5 is respectively arranged on each shoulder 6. The support teeth 5 are arranged at one end of the shoulder 6 facing the shoulder 6 of the other middle drum assembly 1. The plurality of support teeth 5 of the two middle drum assemblies 1 are arranged in a staggered manner. When the two middle drum assemblies 1 move in the direction of approaching each other, the plurality of support teeth 5 of the two middle drum assemblies 1 mesh with each other; there are two side drum assemblies 2, and the two side drum assemblies 2 are respectively oppositely arranged on the two middle drum assemblies 1 and can slide along the axial direction of the middle drum assembly 1. And on the side of the side drum assembly 2 close to the shoulder 6 of the corresponding middle drum assembly 1, there are a plurality of locking blocks 12, and the locking blocks 12 can move along the radial direction of the main shaft assembly 3; the driving assembly is respectively connected to the middle drum assembly 1 and the side drum assemblies 2.

[0033] When using the capsule forming drum in this application, since the driving assembly is respectively connected to the middle drum assembly 1 and the side drum assemblies 2, it is possible to drive at least a part of the middle drum assembly 1 to move axially along the main shaft assembly 3 relative to the main shaft assembly 3 through the driving assembly, and at the same time drive the side drum assemblies 2 to move axially along the middle drum assembly 1 relative to the middle drum assembly 1 and drive the cable width to move radially along the main shaft assembly 3 through the driving assembly. Thus, operations such as material pasting, bead reverse wrapping, inner buckling of the tire side including the bead, crown pasting and over-sizing can be completed through the movement of the middle drum assembly 1, the side drum assemblies 2 and the locking blocks 12. Therefore, the capsule forming drum in this application effectively solves the problem of poor performance of light truck capsule forming drums in the prior art.

[0034] Specifically, the main shaft assembly 3 includes a main shaft body 31 and a lead screw 32. The middle drum assembly 1 is sleeved on the main shaft body 31 and can slide along the main shaft body 31; the lead screw 32 is rotatably arranged inside the main shaft body 31, the axial direction of the lead screw 32 is the same as the axial direction of the main shaft body 31, and at least a part of the middle drum assembly 1 is connected to the lead screw 32.

[0035] Moreover, the middle drum assembly 1 further includes a slider 11, a middle drum body 9, and a middle drum connecting sleeve 8. The slider 11 is arranged on one side where two middle drum assemblies 1 are away from each other, and the slider 11 is threadedly connected to the lead screw 32 and can move along the axial direction of the lead screw 32; the middle drum body 9 is sleeved on the main shaft body 31, and the middle drum body 9 is connected to the slider 11; the middle drum connecting sleeve 8 is sleeved on the middle drum body 9 and can move along the axial direction of the middle drum body 9, and one end of the shoulder 6 away from the support teeth 5 is connected to one end of the middle drum connecting sleeve 8 away from the slider 11. That is to say, in the present application, when the lead screw 32 rotates, the lead screw 32 can drive the slider 11 to move along the axial direction of the main shaft body 31, thereby driving the middle drum body 9 to move along the axial direction of the main shaft body 31. Also, since the middle drum connecting sleeve 8 is arranged on the middle drum body 9, the middle drum connecting sleeve 8 can be driven to move together by the middle drum body 9, and then drive the shoulder 6 and the support teeth 5 to move, so as to realize that the multiple support teeth 5 of the two middle drum assemblies 1 can mesh with each other or move away from each other.

[0036] In a specific embodiment of the present application, the axis of the lead screw 32 coincides with the axis of the main shaft body 31. It should be noted that in the present application, the main shaft body 31 has a limiting hole extending axially for the slider 11 to pass through, and the slider 11 passes through the limiting hole and is connected to the lead screw 32. When the lead screw 32 rotates, the slider 11 moves along the axial direction of the lead screw 32, and due to the effect of the limiting hole, the slider 11 also moves inside the limiting hole.

[0037] Specifically, one end of the middle drum body 9 away from the slider 11 has a limiting baffle 33 extending radially along the main shaft body 31, and the shoulder 6 abuts against the limiting baffle 33 and can slide along the limiting baffle 33. Moreover, the middle drum assembly 1 further includes a plurality of connecting rods 7, and the plurality of connecting rods 7 correspond to the plurality of shoulders 6 one by one. The shoulder 6 is connected to the middle drum connecting sleeve 8 through the connecting rod 7. The connecting rod 7 has an arc segment in the length direction, and the connecting lines at both ends of the connecting rod 7 respectively have an angle greater than zero with the axial direction and the radial direction of the main shaft body 31.

[0038] In a specific embodiment of the present application, both ends of the connecting rod 7 are movably connected to the shoulder 6 and the middle drum connecting sleeve 8 respectively. Or rather, when the middle drum connecting sleeve 8 moves along the axial direction of the middle drum body 9, the included angle between the connecting rod 7 and the middle drum connecting sleeve 8 and the included angle between the connecting rod 7 and the shoulder 6 will both change, so as to ensure that the shoulder 6 can move along the radial direction of the main shaft body 31.

[0039] In a specific embodiment of the present application, the driving assembly includes a main housing connected to the main shaft body 31 and a plurality of hoses. The interior of the main shaft body 31 has a plurality of air passage pipes communicating with the main housing, and the main housing can suck air or exhaust air from the air passage pipes. The middle drum assembly 1 and the side drum assembly 2 are respectively connected to the air passage pipes through different hoses, so as to ensure that the driving assembly can suck air or exhaust air from the main housing to different cavities or driving cavities, and further realize different motion forms of the middle drum assembly 1 and the side drum assembly 2.

[0040] In a specific embodiment of the present application, one end of the middle drum body 9 close to the slider 11 has a first driving cavity. One end of the middle drum connecting sleeve 8 away from the tire shoulder 6 extends into the first driving cavity. The middle drum assembly 1 further includes a middle drum piston 10. The middle drum piston 10 is movably arranged in the first driving cavity and connected to the middle drum connecting sleeve 8. The middle drum piston 10 divides the first driving cavity into a first cavity 20 and a second cavity 21. The first cavity 20 is relatively farther from the tire shoulder 6 than the second cavity 21, and the driving assembly can suck air or exhaust air from the first cavity 20 and the second cavity 21 respectively. In this embodiment, the air source of the main housing inflates the first cavity 20 through the air passage pipe and the hose, and exhausts the air from the second cavity 21. The middle drum piston 10 drives the middle drum connecting sleeve 8 to slide in a direction away from the slider 11. The middle drum connecting sleeve 8 drives the tire shoulder 6 to radially expand along the middle drum body 9 under the action of the limit baffle 33 through the connecting rod 7. At the same time, the circle formed by the meshing of the support teeth 5 expands, making the middle drum expand. On the contrary, if the second cavity 21 is inflated and the first cavity 20 is exhausted, the circle formed by the meshing of the support teeth 5 shrinks, making the middle drum contract.

[0041] Moreover, the side drum assembly 2 includes a side drum body 14 and a side drum guide block 15. The side drum body 14 is arranged on the middle drum connecting sleeve 8 and can slide along the middle drum connecting sleeve 8. One side of the side drum body 14 close to the tire shoulder 6 has a second driving cavity. At least a part of the locking block 12 is arranged in the second driving cavity, and at least another part of the locking block 12 extends out of the second driving cavity. The side drum guide block 15 is arranged on the side drum body 14. The middle drum body 9 has a guide groove extending along the axial direction. One end of the side drum guide block 15 away from the side drum body 14 extends into the guide groove and slides along the guide groove. By such an arrangement, when the driving assembly drives the side drum assembly 2 to move axially along the middle drum assembly 1, the movement direction of the side drum body 14 can be limited through the mutual cooperation of the side drum guide block 15 and the guide groove, so as to ensure the stability of the movement of the side drum body 14.

[0042] Specifically, the side drum assembly 2 further includes an inverted capsule 16, which is arranged around the circumferential outer wall of the side drum body 14 and connected to the locking block 12. The circumferential outer wall of the side drum body 14 covered by the inverted capsule 16 has a sixth cavity 25, and the driving assembly can draw air or exhaust air into the sixth cavity 25. In a specific embodiment of the present application, the main box air source inflates the sixth cavity 25 through the air pipeline and the hose, and the inverted capsule 16 is inflated and expanded. On the contrary, the sixth cavity 25 is exhausted, and the inverted capsule 16 is reset.

[0043] At the same time, the side drum assembly 2 also includes a lifting piston 13, which is movably arranged in the second driving chamber. The end of the lifting piston 13 close to the locking block 12 has a first guiding slope, and the locking block 12 has a second guiding slope parallel to the first guiding slope. The first guiding slope and the second guiding slope abut against each other, and the distance from the first guiding slope to the axis of the lead screw 32 gradually increases in the direction away from the locking block 12. In addition, the lifting piston 13 divides the second driving chamber into two parts, and the end of the lifting piston 13 away from the locking block 12 and the second driving chamber form a third chamber 22. The driving assembly can pump air or exhaust air into the third chamber 22 to drive the lifting piston 13 to move along the axial direction of the lead screw 32. Optionally, the side drum assembly 2 further includes a plurality of first reset members, which correspond to the plurality of lifting pistons 13 one by one, one end of the first reset member abuts against one end of the lifting piston 13 close to the locking block 12, and the other end of the first reset member abuts against the side drum body 14, so as to provide a reset force for the lifting piston 13 to move away from the locking block 12. Optionally, the side drum assembly 2 further includes a second reset member, which is annular and sleeved on the outer peripheral side of the side drum body 14, and is located between the reverse capsule 16 and the plurality of locking blocks 12, so as to provide a reset force for the locking block 12 to move toward the main shaft assembly 3. In a specific embodiment of the present application, the lifting piston 13 abuts against all the locking blocks 12, and the main box air source is directed to the third cavity 22 through the air pipeline and the hose, and the lifting piston 13 slides axially in the direction close to the supporting tooth 5, driving the locking block 12 to expand radially along the side drum body 14, and propping up the reverse capsule 16. If the third cavity 22 is exhausted, under the contraction force of the first reset member, the second reset member and the reverse capsule 16, the locking block 12 falls back radially along the side drum body 14, pushing the lifting piston 13 to reset.

[0044] Specifically, one side of the middle drum connecting sleeve 8 facing the side drum body 14 has a first limiting protrusion arranged circumferentially, and one side of the side drum body 14 facing the middle drum connecting sleeve 8 has a second limiting protrusion arranged circumferentially. The first limiting protrusion, the second limiting protrusion, the middle drum connecting sleeve 8 and the side drum body 14 enclose a fourth cavity 23, and the second limiting protrusion, the middle drum connecting sleeve 8, the side drum body 14 and the middle drum body 9 enclose a fifth cavity 24. The driving assembly can respectively pump air into or exhaust air from the fourth cavity 23 and the fifth cavity 24, and the sum of the volumes of the fourth cavity 23 and the fifth cavity 24 remains unchanged. In this embodiment, the air source of the main chassis inflates the fourth cavity 23 through an air pipeline and a hose, and the fifth cavity 24 exhausts air. The side drum body 14 retreats and axially slides in a direction away from the supporting teeth 5, and the side drum guiding block 15 plays a guiding role. On the contrary, if the fifth cavity 24 is inflated and the fourth cavity 23 exhausts air, the side drum body 14 moves forward and axially slides in a direction close to the supporting teeth 5.

[0045] Optionally, the capsule forming drum in this application further includes an intermediate rubber strip 4, and the intermediate rubber strip 4 covers the outside of the supporting teeth 5 of the two middle drum assemblies 1.

[0046] In this application, a tire forming method and process are also provided, mainly including:

[0047] Material pasting: When the capsule forming drum is in the Figure 2 state, the strip material is wound around the capsule forming drum for one week, and the bead is placed around the capsule forming drum at the position of the locking block 12.

[0048] Bead reverse wrapping: The third cavity 22 is inflated, the locking block 12 expands and locks the bead. The first cavity 20 is inflated, and the second cavity 21 exhausts air, and the middle drum assembly 1 expands. Immediately afterwards, the sixth cavity 25 is inflated, and the reverse wrapping capsule 16 inflates and bulges. The push plate on the main chassis pushes the inflated reverse wrapping capsule 16 to fold towards the direction close to the supporting teeth 5, so that the material wraps the bead in the reverse direction. Then the sixth cavity 25 exhausts air, and the reverse wrapping capsule 16 resets to reach the Figure 3 shown state.

[0049] Inner buckling of the tire side to wrap the bead: When the capsule forming drum is in the Figure 3 state, continue to wind a circle of material at the bead, then the third cavity 22 exhausts air, and the locking block 12 falls back under the elastic state of the second resetting member and the reverse wrapping capsule 16. The fourth cavity 23 is inflated, and the side drum assembly 2 retreats. The roller on the main machine rolls the tire side to the inner buckle to wrap the bead, reaching the Figure 4 shown state.

[0050] Tire crown pasting and over-sizing: When the capsule forming drum is in the Figure 4In the [[STATE]], the fifth cavity 24 is inflated, and the side drum assembly 2 moves forward and resets. Then the third cavity 22 is inflated, and the locking block 12 expands to lock the rubber ring. The tire is inflated and expanded internally, and at the same time, the lead screw 32 is rotated to drive the slider 11 to drive the middle drum assembly 1 and the side drum assembly 2 to slide together towards the support teeth 5, completing the process of applying the tire crown and over-sizing.

[0051] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: The capsule forming drum provided by this solution not only integrates the tire manufacturing processes of the capsule fitting drum and the sizing drum, but also can achieve the bead inward buckling process that cannot be achieved by ordinary capsule drums. It reduces the tire manufacturing process and improves production efficiency; integrating the functions of two drums can reduce the production cost of tires.

[0052] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0053] 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, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A capsule forming drum, characterized in that, it includes: a main shaft assembly (3); a middle drum assembly (1), there are two of the middle drum assemblies (1), the two middle drum assemblies (1) are oppositely arranged on the main shaft assembly (3) and can slide axially along the main shaft assembly (3), the middle drum assembly (1) includes a plurality of shoulders (6) and a plurality of support teeth (5), the shoulders (6) are arranged at one end where the two middle drum assemblies (1) are close to each other, at least one of the support teeth (5) is respectively arranged on each of the shoulders (6), the support teeth (5) are arranged at one end of the shoulder (6) facing the shoulder (6) of the other middle drum assembly (1), the plurality of support teeth (5) of the two middle drum assemblies (1) are staggered, when the two middle drum assemblies (1) move in the direction of approaching each other, the plurality of support teeth (5) of the two middle drum assemblies (1) mesh with each other; a side drum assembly (2), there are two of the side drum assemblies (2), the two side drum assemblies (2) are respectively oppositely arranged on the two middle drum assemblies (1) and can slide axially along the middle drum assembly (1), and one side of the side drum assembly (2) close to the shoulder (6) of the corresponding middle drum assembly (1) has a plurality of locking blocks (12), and the locking blocks (12) can move radially along the main shaft assembly (3); a driving assembly, the driving assembly is respectively connected to the middle drum assembly (1) and the side drum assembly (2); the main shaft assembly (3) includes: a main shaft body (31), the middle drum assembly (1) is sleeved on the main shaft body (31) and can slide along the main shaft body (31); the middle drum assembly (1) further includes: a slider (11), the slider (11) is arranged on one side where the two middle drum assemblies (1) are away from each other; a middle drum body (9), the middle drum body (9) is sleeved on the main shaft body (31), and the middle drum body (9) is connected to the slider (11); a middle drum connecting sleeve (8), the middle drum connecting sleeve (8) is sleeved on the middle drum body (9) and can move axially along the middle drum body (9); the middle drum assembly (1) further includes a plurality of connecting rods (7), the plurality of connecting rods (7) correspond to the plurality of shoulders (6) one by one, and the shoulders (6) are connected to the middle drum connecting sleeve (8) through the connecting rods (7); one end of the middle drum body (9) close to the slider (11) has a first driving cavity, one end of the middle drum connecting sleeve (8) away from the shoulder (6) extends into the first driving cavity, and the middle drum assembly (1) further includes a middle drum piston (10), the middle drum piston (10) is movably arranged in the first driving cavity and is connected to the middle drum connecting sleeve (8).

2. The capsule forming drum according to claim 1, characterized in that, the main shaft assembly (3) further includes: A lead screw (32) is rotatably arranged inside the main shaft body (31). The axial direction of the lead screw (32) is the same as that of the main shaft body (31), and at least a part of the middle drum assembly (1) is connected to the lead screw (32).

3. The capsule forming drum according to claim 2, characterized in that the slider (11) is threadedly connected to the lead screw (32) and can move along the axial direction of the lead screw (32); One end of the tire shoulder (6) away from the support tooth (5) is connected to one end of the middle drum connecting sleeve (8) away from the slider (11).

4. The capsule forming drum according to claim 3, characterized in that One end of the middle drum body (9) away from the slider (11) has a limiting baffle (33) extending in the radial direction of the main shaft body (31), and the tire shoulder (6) abuts against the limiting baffle (33) and can slide along the limiting baffle (33).

5. The capsule forming drum according to claim 4, characterized in that An arc section is provided in the length direction of the connecting rod (7), and the connecting lines at both ends of the connecting rod (7) respectively form an angle greater than zero degree with the axial direction and the radial direction of the main shaft body (31).

6. The capsule forming drum according to claim 3, characterized in that The middle drum piston (10) divides the first driving chamber into a first cavity (20) and a second cavity (21). The first cavity (20) is relatively farther away from the tire shoulder (6) than the second cavity (21), and the driving assembly can respectively draw air or exhaust air from the first cavity (20) and the second cavity (21).

7. The capsule forming drum according to any one of claims 3 to 6, characterized in that The side drum assembly (2) includes: A side drum body (14) is arranged on the middle drum connecting sleeve (8) and can slide along the middle drum connecting sleeve (8). A second driving chamber is provided on one side of the side drum body (14) close to the tire shoulder (6). At least a part of the locking block (12) is arranged in the second driving chamber, and at least another part of the locking block (12) extends out of the second driving chamber; A side drum guide block (15) is arranged on the side drum body (14). The middle drum body (9) has a guide groove extending along the axial direction. One end of the side drum guide block (15) away from the side drum body (14) extends into the guide groove and slides along the guide groove.

8. The capsule forming drum according to claim 7, characterized in that The side drum assembly (2) further includes a lifting piston (13) movably disposed in the second driving cavity. One end of the lifting piston (13) close to the locking block (12) has a first guiding inclined surface, and the locking block (12) has a second guiding inclined surface parallel to the first guiding inclined surface. The first guiding inclined surface and the second guiding inclined surface are in mutual contact, and the distance from the first guiding inclined surface to the axis of the lead screw (32) gradually increases in the direction away from the locking block (12).

9. The capsule forming drum according to claim 8, wherein, the lifting piston (13) divides the second driving cavity into two parts. One end of the lifting piston (13) away from the locking block (12) and the second driving cavity enclose a third cavity (22), and the driving assembly can evacuate or exhaust air to the third cavity (22) to drive the lifting piston (13) to move along the axial direction of the lead screw (32).

10. The capsule forming drum according to claim 8, wherein, the side drum assembly (2) further includes a plurality of first reset members. The plurality of first reset members correspond to the plurality of lifting pistons (13) one by one. One end of the first reset member abuts against one end of the lifting piston (13) close to the locking block (12), and the other end of the first reset member abuts against the side drum body (14) to provide a reset force for the lifting piston (13) to move in the direction away from the locking block (12).

11. The capsule forming drum according to claim 7, wherein, one side of the middle drum connecting sleeve (8) facing the side drum body (14) has a first limiting protrusion arranged circumferentially. One side of the side drum body (14) facing the middle drum connecting sleeve (8) has a second limiting protrusion arranged circumferentially. The first limiting protrusion, the second limiting protrusion, the middle drum connecting sleeve (8) and the side drum body (14) enclose a fourth cavity (23). The second limiting protrusion, the middle drum connecting sleeve (8), the side drum body (14) and the middle drum body (9) enclose a fifth cavity (24). The driving assembly can evacuate or exhaust air to the fourth cavity (23) and the fifth cavity (24) respectively, and the sum of the volumes of the fourth cavity (23) and the fifth cavity (24) remains unchanged.

12. The capsule forming drum according to claim 7, wherein, the side drum assembly (2) further includes an anti - wrapping capsule (16). The anti - wrapping capsule (16) is arranged around the circumferential outer wall of the side drum body (14) and is connected to the locking block (12). The circumferential outer wall of the side drum body (14) covered by the anti - wrapping capsule (16) has a sixth cavity (25), and the driving assembly can evacuate or exhaust air to the sixth cavity (25).

13. The capsule forming drum according to claim 12, wherein, The side drum assembly (2) further includes a second reset member, the second reset member being annular and sleeved on the outer peripheral side of the side drum body (14), and the second reset member being located between the reverse wrapping capsule (16) and the plurality of locking blocks (12) to provide a reset force for the locking blocks (12) to move towards the main shaft assembly (3).

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