A run-flat forming drum

Abstract

The present invention discloses a run-flat forming drum, which includes a center cover plate, a capsule inner chuck and a capsule. The run-flat forming drum also includes a first ring body and a second ring body. The first ring body is sleeved on the capsule and seals and connects the capsule to the capsule inner chuck; the second ring body can be disassembled and assembled on the first ring body, and is composed of a plurality of split parts spliced ​​along the circumferential direction. Compared with the traditional technology, the components of the run-flat forming drum of the present invention adopt a split structure. When producing run-flat tires of different models, the overall disassembly and installation of the run-flat forming drum is avoided, the time of disassembly and installation operation is shortened, the manpower consumption is reduced, and the production efficiency of the run-flat tire is greatly improved; and the split ring is used to replace the original support ring, which reduces the production cost of the forming drum and improves the economy.

Description

Technical Field

[0001] The present application belongs to the technical field of tire preparation, and in particular relates to a run-flat building drum. Background Art

[0002] A run-flat tire is a tire that can still be used normally after being deflated. It is popular because it can still travel safely at normal speed for a long distance even when it is completely deflated. A run-flat forming drum is a special equipment for producing run-flat tires, which is generally divided into two categories: mechanical drum and capsule drum.

[0003] The size of the center cover plate and the support ring of the run-flat drum, and their relative position relationship jointly determine the model and specifications of the run-flat tire. When producing run-flat tires of different models, it is necessary to replace the center cover plate of different models, or replace the support ring of different models, or replace the center cover plate and the support ring at the same time, that is, replace the center cover plate and match it with the corresponding support ring.

[0004] However, the existing center cover plate and support ring are both integrated structures. When producing different types of run-flat tires and replacing the center cover plate or the support ring, the run-flat forming drum needs to be disassembled as a whole and then replaced and assembled. This process is not only time-consuming (about 4 hours) but also consumes a lot of manpower and material resources, affecting the production efficiency of the run-flat tire.

[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a run-flat building drum. When producing run-flat tires of different models and replacing support rings of different models or support rings matching the center cover plate, the overall disassembly of the run-flat building drum can be avoided, thereby shortening the operation time, reducing manpower consumption, and greatly improving the production efficiency of the run-flat tires.

[0007] To achieve the above-mentioned purpose, the present invention proposes a run-flat forming drum, comprising a central cover plate, capsule inner chucks on both sides of the central cover plate, and a capsule sleeved on the capsule inner chucks, wherein the capsule inner chucks can move relative to the central cover plate along the axial direction of the central cover plate. The run-flat forming drum also includes a first ring body and a second ring body, wherein the first ring body is sleeved on the capsule to seal and connect the capsule to the capsule inner chucks. The second ring body is composed of a plurality of split bodies spliced ​​along the circumferential direction, and the second ring body can be detached from the first ring body, and moves relative to the central cover plate along the axial direction of the central cover plate along with the capsule inner chucks.

[0008] In the run-flat building drum of the present application, a combination of a first ring body and a second ring body is used to replace the original support ring. The first ring body replaces the original support ring to seal the capsule, and the capsule is sealed and connected to the chuck inside the capsule to ensure the normal use of the run-flat building drum capsule. The second ring body replaces the original support ring to provide different working surfaces. It is detachably fixed to the first ring body and moves relative to the center cover plate along the axial direction of the center cover plate with the chuck inside the capsule to ensure matching production requirements of tires of different models. In addition, the second ring body also adopts a split structure, which is composed of multiple ring bodies spliced ​​along the circumferential direction. When replacing second ring bodies of different models, multiple split rings can be directly disassembled and assembled, which is more convenient for rapid replacement of different working surfaces of the run-flat building drum.

[0009] The run-flat building drum adopts a split-structure ring body to replace the original support ring. When producing run-flat tires of different models and replacing support rings of different models or support rings that match the center cover, it can avoid disassembling the run-flat building drum as a whole, shortening the operation time, reducing manpower consumption, and greatly improving the production efficiency of run-flat tires.

[0010] In addition, for different types of support rings, the run-flat forming drum of the present invention can be configured with only one first ring body and adapted to multiple second ring bodies corresponding to different types of support rings, thereby meeting the production requirements of different types of run-flat tires, reducing material consumption, reducing the production cost of the forming drum, and improving the economy of the run-flat forming drum.

[0011] In an example of a run-flat drum, the center cover is composed of multiple split parts spliced ​​together along the circumferential direction. The center cover is similar to the second ring body, and is also composed of multiple split rings. When positioning different types of drums, compared with the center cover of the integral structure, the multiple split rings of the center cover of different types can be directly disassembled and assembled, and the replacement of the center cover of different types can be completed quickly, avoiding the disassembly and installation of the run-flat drum as a whole, and improving the production efficiency of run-flat tires.

[0012] In an example of a run-flat drum, the center cover is composed of two half rings. Preferably, the center cover is composed of two half rings, which is more convenient for workers to disassemble and assemble than multiple separate center covers, such as three third-ring bodies or four quarter-ring bodies, and can quickly complete the replacement of center covers of different models, avoiding the disassembly and installation of the run-flat drum as a whole, thereby improving the production efficiency of run-flat tires.

[0013] In an example of a run-flat drum, the second ring body is composed of two half rings. Preferably, the second ring body is composed of two half rings, similar to the center cover plate composed of the two half rings mentioned above. Compared with multiple split second ring bodies, such as three third ring bodies or four quarter ring bodies, it is more convenient for workers to disassemble and assemble, quickly complete the replacement of different types of center covers, avoid the disassembly and installation of the run-flat drum as a whole, and improve the production efficiency of run-flat tires.

[0014] In an example of a run-flat forming drum, a connecting column extending axially along the center cover plate is provided at one end of the first ring body facing the center cover plate, and a groove capable of engaging with the connecting column is provided on the radial inner side of each half ring of the second ring body.

[0015] A connecting column is arranged on the first ring body, and a slot which can be snapped into the connecting column is adapted on the inner side of the ring surface of the second ring body. The half ring of the second ring body is snapped onto the connecting column extending from the first ring body through the slot. This structure can quickly complete the assembly and fixation of the second ring body, and can save the operation time of the staff compared with other fastening methods such as screws adapting to screw holes, which is beneficial to improving the production efficiency of run-flat tires.

[0016] In one example of a run-flat building drum, the connecting studs are constituted by screws connected to the first ring.

[0017] Commonly used screws are installed on the first ring body, and a slot matching the screw is opened on the inner side of the ring surface of the second ring body. The half rings of the second ring body are buckled on the screws of the first ring body through the slots. When replacing the second ring body of different models, it is only necessary to loosen the screws to complete the disassembly of the half rings of the second ring body. This is convenient and quick, can save the operation time of the staff, and is conducive to improving the production efficiency of the run-flat tire.

[0018] In any of the above examples of run-flat drums, grooves are provided on the surface of the drum bladder. Usually, the bladder surface of a run-flat drum is smooth. During production, after the inner liner is attached to the run-flat drum, the vacuum at the bottom of the bladder will cause the support material to over-fit with the bladder surface, or even cause the material to stick to the bladder, resulting in a loose fit of the tire embryo layer or even the fall-off of the tire embryo when the support material is subsequently flanging and attached. By providing grooves on the bladder surface, a certain gap is provided between the support material and the bladder surface, which facilitates the separation of the support material and the bladder during flanging and attachment, thereby ensuring the smooth completion of the tire side operation and improving the quality of the run-flat drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 A schematic structural diagram for illustrating an exemplary implementation of a run-flat building drum, and a schematic structural diagram of a run-flat building drum in a usage state;

[0021] Figure 2 A structural schematic diagram for illustrating another use state of the run-flat building drum;

[0022] Figure 3 A schematic diagram for explaining the structure of the original support ring of the run-flat forming drum;

[0023] Figure 4 A schematic diagram for explaining the structure of the first ring body after the original support ring of the run-flat forming drum is split;

[0024] Figure 5 A schematic diagram for explaining the structure of the second ring body of the run-flat forming drum after the original support ring is split;

[0025] Figure 6 To illustrate Figure 5 A schematic diagram of the structure of the second ring body from the left, and a schematic diagram of the structure of the second ring body consisting of two half ring bodies;

[0026] Figure 7 A schematic diagram of the installation structure for explaining an exemplary embodiment of a run-flat building drum half drum;

[0027] Figure numerals: 10 - center cover plate, 11 - center cover plate half ring, 20 - capsule inner chuck, 30 - capsule, 31 - groove, 40 - first ring body, 50 - second ring body, 51 - second ring body half ring, 60 - connecting column, 70 - slot, 80 - original support ring, 81 - dividing line. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0029] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the description of this specification, the description with reference to the terms "one solution", "some solutions", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the solution or example are included in at least one solution or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more solutions or examples in a suitable manner.

[0033] For ease of description, "front", "back", "left", "right", "up" and "down" below refer to the directions of the forming drum relative to the user when it is in use; among them, the side facing the user is the front, and the other opposite side is the back.

[0034] Figure 1 A schematic diagram for illustrating a schematic structural embodiment of a run-flat building drum, and a schematic structural diagram of a run-flat building drum in a state of use, Figure 2 A schematic diagram of the structure used to illustrate another use state of the run-flat building drum. Figure 1As shown, an embodiment of the present invention proposes a run-flat forming drum, comprising a central cover plate 10, capsule inner chucks 20 on both sides of the central cover plate 10, and a capsule 30 sleeved on the capsule inner chucks 20, wherein the capsule inner chucks 20 can move relative to the central cover plate 10 along the axial direction of the central cover plate 10. The run-flat forming drum also includes a first ring body 40 and a second ring body 50, wherein the first ring body 40 is sleeved on the capsule 30 to seal and connect the capsule 30 to the capsule inner chucks 20. The second ring body 50 is composed of a plurality of split bodies spliced ​​along the circumferential direction, and the second ring body 50 can be detached from the first ring body 40, and moves relative to the central cover plate 10 along the axial direction of the central cover plate 10 along with the capsule inner chucks 20.

[0035] The size of the center cover plate 10 of the run-flat forming drum and the size of the support ring 80, as well as their relative positional relationship, jointly determine the model and specifications of the run-flat tire produced. In order to meet the production of different models of run-flat tires, the center cover plate 10 has multiple sizes with different outer diameters and different widths of the same diameter, and the support ring also has multiple sizes with different outer diameters and different widths of the same diameter.

[0036] The radial inner side of the center cover plate 10 has a moving area for the support ring 80 to expand and contract, ensuring that the support ring can move freely relative to the center cover plate. In addition, the inner diameter of the center cover plate 10 is adapted to the outer diameter of the support ring, and the outer diameter of the support ring just fits the inner diameter of the center cover plate 10. When producing run-flat tires of different models, or replacing support rings of different models (ring surface width), or replacing the center cover plate and matching the corresponding support ring, the run-flat forming drum needs to be disassembled as a whole, and then replaced and assembled. In addition, after a certain model of center cover plate 10 is selected, if it is not suitable for the corresponding support ring, a certain gap will be generated between the center cover plate 10 and the support ring. During the extrusion molding process of the run-flat tire, the edge of the center cover plate is easy to scratch the inner wall of the tire, thereby affecting the quality of the tire.

[0037] Therefore, in this solution, directly at the variable annular surface of the original support ring 80, such as Figure 3 As shown, it is divided into two parts along the circumferential dividing line 81, and the ring with a smaller outer diameter is the first ring body 40, and its integral structure is retained, as shown in FIG. Figure 4 The ring with a larger outer diameter is the second ring body 50, and then the second ring body is divided into a plurality of split rings, and the plurality of split rings are circumferentially spliced ​​into a complete second ring body, as shown. Figure 5 The first ring body 40 seals the bladder 30 to the chuck 20 inside the bladder to prevent air leakage from the forming drum, and the second ring body 50 is used to provide a working surface for the run-flat tire.

[0038] In the run-flat drum of the present invention, the combination of the first ring body 10 and the second ring body 20 is used to replace the original support ring. The first ring body 10 replaces the original support ring to seal the capsule 30, and the capsule 30 is sealed and connected to the chuck 20 in the capsule to ensure the normal use of the run-flat drum capsule 30. The second ring body 50 replaces the original support ring to provide different working surfaces. It is detachably fixed on the first ring body 40, and moves relative to the center cover plate 10 along the axial direction of the center cover plate 10 with the chuck 20 in the capsule to ensure the matching of production requirements of different types of tires. In addition, the second ring body 50 also adopts a split structure, which is composed of multiple ring bodies spliced ​​along the circumferential direction. When replacing different types of second ring bodies 50, multiple split rings can be directly disassembled and assembled, which is more convenient for the rapid replacement of different working surfaces of the run-flat drum.

[0039] The run-flat forming drum adopts a split-structure ring body to replace the original support ring. When producing run-flat tires of different models and replacing support rings of different models or support rings matching the center cover 10, the run-flat forming drum can be avoided from being disassembled as a whole, which shortens the operation time, reduces manpower consumption, and greatly improves the production efficiency of run-flat tires.

[0040] In addition, for different types of support rings, the run-flat forming drum of the present invention can be configured with only one first ring body 40, and adapted to multiple second ring bodies 50 corresponding to different types of support rings, so as to meet the production requirements of different types of run-flat tires, reduce material consumption, reduce the production cost of the forming drum, and improve the economy of the run-flat forming drum.

[0041] In a specific embodiment, the center cover plate 10 is composed of a plurality of parts spliced ​​together along the circumferential direction (not shown in the figure). Specifically, on the annular surface of the original center cover plate 10 of each model, it is divided into a plurality of parts in the direction of the central axis, and the plurality of parts are spliced ​​and fixed to the center cover plate bracket when in use. The center cover plate 10 is composed of a plurality of parts spliced ​​together along the circumferential direction. The center cover plate 10 is similar to the second ring body 50, and is also composed of a plurality of split rings. When positioning different models of forming drums, compared with the center cover plate 10 with an integral structure, the plurality of split rings of the center cover plates 10 of different models can be directly disassembled and assembled, and the replacement of the center cover plates 10 of different models can be completed quickly, avoiding the disassembly and installation of the run-flat forming drum as a whole, and improving the production efficiency of the run-flat tire.

[0042] Preferably, the original central cover plate 10 of each model is divided into two central cover plate half rings 11. The central cover plate 10 is composed of two half rings. Figure 1Compared with multiple split center covers, such as three one-third rings or four one-quarter rings, it is more convenient for workers to disassemble and assemble, quickly complete the replacement of center covers of different models, avoid the overall disassembly and installation of the run-flat tire building drum, and improve the production efficiency of the run-flat tire.

[0043] In a specific embodiment, Figure 5 and Figure 6 As shown, the second ring body 50 is composed of two second ring body half rings 51. Specifically, the original supporting ring can be directly divided into two parts along the circumferential direction at the variable ring surface. The ring with a smaller outer diameter is the first ring body 40, and the ring with a larger outer diameter is the second ring body 50. Then, the second ring body 50 is divided into two half rings on the ring surface toward the center axis.

[0044] The second ring body 50 is composed of two half-rings, similar to the center cover plate 10 composed of the aforementioned two half-rings. Compared with multiple split second ring bodies, such as three third-ring bodies or four quarter-ring bodies, it is more convenient for workers to disassemble and assemble, and can quickly complete the replacement of center cover plates 10 of different models, avoiding the overall disassembly and installation of the run-flat forming drum, thereby improving the production efficiency of the run-flat tire.

[0045] In a specific embodiment, Figure 7 As shown, a connecting column 60 extending along the axial direction of the center cover plate 10 is provided at one end of the first ring body 40 facing the center cover plate 10, and a slot 70 capable of being snapped with the connecting column 60 is provided on the radial inner side of the two supporting half rings 51 of the second ring body 50. A connecting column is provided on the first ring body, and a slot capable of being snapped with the connecting column is adapted to the inner side of the annular surface of the second ring body, and the half ring of the second ring body is snapped on the connecting column extending from the first ring body through the slot. During production, the two supporting half rings 51 of the second ring body 50 are snapped and fixed on the connecting column 60 through the slot 70 provided by themselves. This structure can quickly complete the assembly and fixation of the second ring body, and can save the operation time of the staff compared with other fastening methods such as screws adapting to screw holes, which is conducive to improving the production efficiency of run-flat tires.

[0046] A blind hole is punched on the side of the base ring 40 divided by the support ring, and a matching connecting column 60 is inserted into the connecting hole; a connecting hole is arranged on the radial inner side of the supporting half ring 51 of the divided second ring body 50, and then the part of the ring body around the connecting hole away from the ring surface is removed to obtain a clamping groove 70, and then the supporting half ring 51 of the second ring body 50 is buckled on the connecting column 60 through the clamping groove 70. The supporting half ring 51 of the second ring body 50 is buckled on the connecting column 60 extending from the first ring body 40 through the clamping groove, which can quickly complete the installation and fixation of the second ring body 50, saving the operation time of the staff.

[0047] The connecting column 60 uses a fastening screw, and the supporting half ring 51 of the second ring body 50 is buckled on the screw on the side of the first ring body 40. When replacing the second ring body 50, it is only necessary to loosen the screw to complete the disassembly of the supporting half rings 51 of the second ring body 50, and then buckle the supporting half rings 51 of the second ring body 50 of the required specifications on the screw. It is only necessary to tighten the screw to complete the installation and fixation of the second ring body 50, which is convenient and quick.

[0048] In a specific embodiment, Figure 7 As shown, the surface of the bladder 30 is processed with a plurality of grooves 31. Usually, the surface of the bladder of the run-flat drum is smooth. During production, after the inner liner is attached to the run-flat drum, the vacuum effect at the bottom of the bladder will cause the support material to over-attach to the surface of the bladder, and even cause the material to adhere to the bladder, resulting in the tire embryo layer not being firmly attached when the support material is flanging and attached, or even the tire embryo falling off. By arranging grooves on the surface of the bladder, a certain gap is provided between the support material and the surface of the bladder, which facilitates the separation of the support material and the bladder when the flanging is attached, ensures the smooth completion of the tire side operation, and improves the quality of the run-flat drum.

[0049] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0050] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A run-flat forming drum, comprising a central cover plate, capsule inner chucks on both sides of the central cover plate, and a capsule sleeved on the capsule inner chucks, wherein the capsule inner chucks can move relative to the central cover plate along the axial direction of the central cover plate, and is characterized in that: The run-flat forming drum further comprises: a first ring body, wherein the first ring body is sleeved on the capsule to seal the capsule to the chuck inside the capsule; and The second ring body is composed of a plurality of separate parts spliced ​​together along the circumferential direction. The second ring body can be detached from the first ring body and moves relative to the center cover plate along the axial direction of the center cover plate along with the chuck in the capsule. The second ring body is used to provide a working surface for the run-flat tire; The original supporting ring is divided into two parts along the circumferential direction at the variable ring surface, the ring with a smaller outer diameter is the first ring body, and the ring with a larger outer diameter is the second ring body.

2. The run-flat building drum according to claim 1, characterized in that: The central cover plate is composed of a plurality of separate parts spliced ​​together along the circumferential direction.

3. The run-flat building drum according to claim 2, characterized in that: The central cover is composed of two half rings.

4. The run-flat building drum according to claim 1, characterized in that: The second ring body is composed of two half rings.

5. The run-flat building drum according to claim 4, characterized in that: A connecting column extending along the axial direction of the center cover plate is disposed at one end of the first ring body facing the center cover plate, and a slot capable of being engaged with the connecting column is disposed on the radial inner side of each half ring.

6. The run-flat building drum according to claim 5, characterized in that: The connecting column is composed of a screw connected to the first ring body.

7. The run-flat building drum according to any one of claims 1 to 6, characterized in that: The capsule surface is provided with grooves.

Images