Capsule clamping device and tire mold

Abstract

The utility model relates to the field of tire mould, concretely relates to a capsule clamping device and tire mould, including lower clamping ring, ring seat, lower steel ring, lower clamping ring divides into inner clamping ring and outer clamping ring, inner clamping ring is fixedly connected with ring seat, and outer clamping ring is fixedly connected with lower steel ring, inner clamping ring is coaxially covered with outer clamping ring, inner clamping ring has first limit part and second limit part, and outer clamping ring has matched third limit part and fourth limit part, first limit part and third limit part are taper face, interference fit, and first limit part and third limit part are provided with sealing ring and are reinforced sealing between, second limit part and fourth limit part are cylindrical surface, clearance fit, and second limit part and fourth limit part are connected through limit screw. When disassembling lower clamping ring, only need to disassemble outer clamping ring, taper face setting makes the disassembly of lower clamping ring hardly affected by thermal expansion, and the connecting mode of limit screw makes the disassembly of lower clamping ring more convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of tire vulcanization technology, specifically to a capsule clamping device and a tire mold. Background Technology

[0002] During tire vulcanization, the lower clamping ring is fixedly connected to the ring seat of the vulcanizing machine's central mechanism. The lower clamping ring and the lower steel rim cooperate to clamp the bladder for vulcanization. To prevent air leakage after the lower clamping ring and ring seat are installed, the assembly gap between the lower clamping ring and the ring seat is usually set to be small during the design process. When the lower clamping ring and ring seat are heated, the parts expand, eliminating the originally reserved gap and causing an interference fit between the parts, making disassembly difficult. When changing the bladder, the mold needs to be cooled down before the lower clamping ring can be disassembled, resulting in a longer replacement time and affecting the tire vulcanization schedule. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a capsule clamping device and a tire mold. The lower clamping ring is designed as a split structure, including an inner clamping ring and an outer clamping ring. The inner clamping ring is fixedly connected to the ring seat, and the outer clamping ring is fixedly connected to the lower steel ring. The inner and outer clamping rings are engaged by the conical surfaces of the first and third limiting parts. When assembling or disassembling the lower clamping ring, the inner clamping ring remains fixedly connected to the ring seat, and only the outer clamping ring is disassembled or assembled. Furthermore, the engagement of the conical surfaces is almost unaffected by thermal expansion, simplifying the assembly and disassembly process of the lower clamping ring and saving assembly and disassembly time.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: On the one hand, this utility model provides a capsule clamping device, including a lower clamping ring, a ring seat, and a lower steel ring. The lower clamping ring includes an inner clamping ring and an outer clamping ring. The inner clamping ring is fixedly connected to the ring seat, and the outer clamping ring is fixedly connected to the lower steel ring. The inner clamping ring and the outer clamping ring are coaxially sleeved, and the outer clamping ring and the lower steel ring cooperate to form a clamping cavity for clamping one end edge of the capsule.

[0005] Furthermore, the inner clamping ring has a first limiting part and a second limiting part along the axial direction, and the first limiting part and the second limiting part are fixedly connected; the outer clamping ring has a third limiting part that matches the first limiting part and a fourth limiting part that cooperates with the second limiting part along the axial direction, and the third limiting part and the fourth limiting part are fixedly connected.

[0006] Furthermore, the outer surface of the first limiting part is interference-fitted with the inner surface of the third limiting part, and the outer surface of the second limiting part is clearance-fitted with the inner surface of the fourth limiting part.

[0007] Furthermore, the outer diameter of the first limiting part gradually increases in the direction away from the capsule, while the outer diameter of the second limiting part remains consistent in the axial direction, and the maximum outer diameter of the first limiting part is equal to the outer diameter of the second limiting part.

[0008] Furthermore, a sealing ring is provided between the first limiting part and the third limiting part, and a groove for accommodating the sealing ring is formed on the outer surface of the first limiting part or the inner surface of the third limiting part.

[0009] Furthermore, the outer surface of the second limiting part is provided with a plurality of first opening structures, and the fourth limiting part is provided with a plurality of second opening structures in the radial direction; the first opening structures and the second opening structures are connected; the first opening structure is a non-through hole, and the second opening structure is a through hole.

[0010] Furthermore, the second opening structure is divided into two parts: the second opening structure away from the ring seat is a guide countersunk hole, and the second opening structure closer to the ring seat is a threaded hole; the limiting screw enters the first opening structure and the second opening from the outer surface of the fourth limiting part, and the head of the limiting screw sinks into the guide countersunk hole, limiting the inner and outer clamping rings through the countersunk platform of the guide countersunk hole; the threaded part of the limiting screw enters the threaded hole, and the tail of the limiting screw enters the first opening structure; the limiting screw matches the first opening structure and the second opening.

[0011] Furthermore, the tail of the limiting screw is frustum-shaped, and the diameter of the tail of the limiting screw gradually decreases in the direction away from the head of the limiting screw.

[0012] Furthermore, the lower steel ring is fixedly connected to the outer clamping ring by screws; and / or, the inner clamping ring is fixedly connected to the ring seat by trapezoidal threads on its inner surface.

[0013] On the other hand, this utility model provides a tire mold, including the aforementioned capsule clamping device.

[0014] The beneficial effects achieved by this utility model are as follows: This utility model designs the lower clamping ring as a split structure, including an inner clamping ring and an outer clamping ring. The inner clamping ring is always fixedly connected to the ring seat. The inner clamping ring and the outer clamping ring are connected by a limiting screw. When it is necessary to disassemble or assemble the lower clamping ring, it is only necessary to remove or install the limiting screw to disassemble or assemble the outer clamping ring, thus simplifying the disassembly and assembly process.

[0015] The inner and outer clamping rings of this invention are engaged by the conical surfaces of the first and third limiting parts. During the vulcanization process, when thermal expansion occurs, the conical surface engagement ensures that the engagement of the inner and outer clamping rings is almost unaffected by thermal expansion, eliminating the need to wait for the mold to cool down before disassembly and saving the time required for clamping ring assembly and disassembly.

[0016] In this invention, the inner and outer clamping rings are connected by a limiting screw. The tail of the limiting screw is designed in the shape of a frustum, which enhances the guiding and positioning of the limiting screw as it enters the outer and inner clamping rings from the fourth limiting part. It also avoids wear between the limiting screw and the outer and inner clamping rings to a certain extent, ensuring thread accuracy. In addition, the frustum-shaped tail of the limiting screw improves the sealing performance and reduces gas leakage as the limiting screw is gradually tightened. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inner clamping ring structure of this utility model; Figure 3 This is a schematic diagram of the outer clamping ring structure of this utility model.

[0019] In the picture, 100. Inner clamping ring; 101. First limiting part; 102. Second limiting part; 200. Outer clamping ring; 201. Third limiting part; 202. Fourth limiting part; 300. Sealing ring; 301. Groove; 400. Limiting screw; 401. First opening structure; 402. Second opening structure; 4021. Guide countersunk hole; 4022. Threaded hole; 500. Ring seat; 600. Lower steel ring. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Firstly, please refer to Figures 1-3 This invention provides an embodiment of a capsule clamping device, comprising a lower clamping ring, a ring seat 500, and a lower steel ring 600. The lower clamping ring is a split structure, including an inner clamping ring 100 and an outer clamping ring 200, which are coaxially sleeved. After the inner and outer clamping rings are engaged, their two ends near the capsule are on the same horizontal plane. The inner clamping ring 100 is fixedly connected to the ring seat 500, and the inner surface of the inner clamping ring 100 and the outer surface of the ring seat 500 are provided with matching trapezoidal threads. The ring seat 500 and the inner clamping ring 100 are fixedly connected by the trapezoidal threads. The outer clamping ring 200 is fixedly connected to the lower steel ring 600 by bolts or the like. The outer clamping ring 200 and the lower steel ring 600 cooperate to form a clamping cavity for clamping one end edge of the capsule.

[0025] The inner clamping ring 100 has a first limiting portion 101 and a second limiting portion 102 along the axial direction. The first limiting portion 101 and the second limiting portion 102 are fixedly connected. The first limiting portion 101 and the second limiting portion 102 can be integrally formed or fixedly connected by bolts or the like. The outer clamping ring 200 has a third limiting portion 201 that matches the first limiting portion 101 and a fourth limiting portion 202 that cooperates with the second limiting portion 102 along the axial direction. The third limiting portion 201 and the fourth limiting portion 202 are fixedly connected. The third limiting portion 201 and the fourth limiting portion 202 can be integrally formed or fixedly connected by bolts or the like. Preferably, the trapezoidal thread on the inner surface of the inner clamping ring 100 that cooperates with the ring seat 500 is provided on the inner surface of the second limiting portion 102.

[0026] The outer surface of the first limiting part 101 is interference-fitted with the inner surface of the third limiting part 201, while the outer surface of the second limiting part 102 is clearance-fitted with the inner surface of the fourth limiting part 202. The first limiting part 101 and the third limiting part 201 have a conical fit; specifically, the outer diameter of the first limiting part 101 gradually increases in the direction away from the capsule, while the outer diameter of the second limiting part 102 remains consistent in the axial direction. The maximum outer diameter of the first limiting part 101 is equal to the outer diameter of the second limiting part. Besides limiting the inner clamping ring 100 and the outer clamping ring 200, the conical fit also ensures that the fit between the inner clamping ring 100 and the outer clamping ring 200 is almost unaffected by thermal expansion during vulcanization, eliminating the need to wait for the mold to cool down before disassembly and saving clamping ring assembly and disassembly time.

[0027] Preferably, an annular sealing ring 300 is provided between the first limiting part 101 and the third limiting part 201. A groove 301 for accommodating the sealing ring 300 is formed on the outer surface of the first limiting part 101 or the inner surface of the third limiting part 201. The number of sealing rings 300 is 1 to 6. By providing a sealing ring 300 between the first limiting part 101 and the third limiting part 201, the amount of air leakage during the vulcanization process is reduced to a certain extent.

[0028] The outer surface of the second limiting part 102 has several first opening structures 401, which are non-through holes. The fourth limiting part 202 has several second opening structures 402 in the radial direction, which are through holes. The first opening structures 401 and the second opening structures 402 are connected and match the limiting screw 400. The limiting screw 400 can enter the first opening structure 401 and the second opening structure 402 to limit and fasten the inner clamping ring 100 and the outer clamping ring 200.

[0029] Preferably, the second opening structure 402 is divided into two parts: the second opening structure 402 away from the ring seat 500 is a guide countersunk hole 4021, and the second opening structure 402 closer to the ring seat 500 is a threaded hole 4022; the limiting screw 400 enters the first opening structure 401 and the second opening structure 402 from the outer surface of the fourth limiting part 202, the head of the limiting screw 400 sinks into the guide countersunk hole 4021, and the second limiting part 102 and the fourth limiting part 202 are limited by the countersunk platform of the guide countersunk hole 4021; the threaded part of the limiting screw 400 enters the threaded hole 4022, and the tail of the limiting screw 400 enters the first opening structure 401.

[0030] Preferably, the tail of the limiting screw 400 is frustoconical, and the diameter of the tail gradually decreases in the direction away from the head of the limiting screw 400. The matching first opening structure 401 is also set as a frustoconical non-through hole. The design of the frustoconical tail of the limiting screw 400 strengthens the guiding and positioning of the limiting screw 400 from the fourth limiting part 202 into the outer clamping ring 200 and the inner clamping ring 100, and to a certain extent avoids the wear between the limiting screw 400 and the outer clamping ring 200 and the inner clamping ring 100, ensuring thread accuracy. In addition, the design of the tail of the limiting screw 400 as frustoconical improves the sealing performance and reduces the amount of gas leakage during the gradual tightening process.

[0031] When disassembling and assembling the lower clamping ring, the inner clamping ring 100 is always fixedly connected to the ring seat 500. Only the outer clamping ring 200 needs to be disassembled and assembled to complete the replacement of the lower clamping ring. In addition, the inner clamping ring 100 and the outer clamping ring 200 are connected by a limit screw 400, which makes disassembly and assembly more convenient and quick, saving disassembly and assembly time.

[0032] On the other hand, one embodiment of a tire mold provided by this utility model includes the aforementioned capsule clamping device. By designing the lower clamping ring as a split outer clamping ring 200 and inner clamping ring 100, the disassembly and assembly steps are simplified and the tire vulcanization efficiency is improved.

[0033] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the utility model herein.

Claims

1. A capsule clamping device, comprising a lower clamping ring, a ring seat (500), and a lower steel ring (600), characterized in that: The lower clamping ring includes an inner clamping ring (100) and an outer clamping ring (200). The inner clamping ring (100) is fixedly connected to the ring seat (500), and the outer clamping ring (200) is fixedly connected to the lower steel ring (600). The inner clamping ring (100) and the outer clamping ring (200) are coaxially sleeved together, and the outer clamping ring (200) and the lower steel ring (600) cooperate to form a clamping cavity for clamping one end edge of the capsule.

2. The capsule clamping device according to claim 1, characterized in that: The inner clamping ring (100) has a first limiting part (101) and a second limiting part (102) along the axial direction, and the first limiting part (101) and the second limiting part (102) are fixedly connected; the outer clamping ring (200) has a third limiting part (201) that matches the first limiting part (101) and a fourth limiting part (202) that cooperates with the second limiting part (102) along the axial direction, and the third limiting part (201) and the fourth limiting part (202) are fixedly connected.

3. The capsule clamping device according to claim 2, characterized in that: The outer surface of the first limiting part (101) is interference-fitted with the inner surface of the third limiting part (201), and the outer surface of the second limiting part (102) is clearance-fitted with the inner surface of the fourth limiting part (202).

4. The capsule clamping device according to claim 3, characterized in that: The outer diameter of the first limiting part (101) gradually increases in the direction away from the capsule, and the outer diameter of the second limiting part (102) remains consistent in the axial direction. The maximum outer diameter of the first limiting part (101) is equal to the outer diameter of the second limiting part (102).

5. The capsule clamping device according to claim 3, characterized in that: A sealing ring (300) is provided between the first limiting part (101) and the third limiting part (201), and a groove (301) for accommodating the sealing ring (300) is provided on the outer surface of the first limiting part (101) or the inner surface of the third limiting part (201).

6. The capsule clamping device according to claim 3, characterized in that: The outer surface of the second limiting part (102) is provided with a plurality of first opening structures (401), and the fourth limiting part (202) is provided with a plurality of second opening structures (402) in the radial direction; the first opening structure (401) and the second opening structure (402) are connected; the first opening structure (401) is a non-through hole, and the second opening structure (402) is a through hole.

7. A capsule clamping device according to claim 6, characterized in that: The second opening structure (402) is divided into two parts. The second opening structure (402) away from the ring seat (500) is a guide countersunk hole (4021), and the second opening structure (402) near the ring seat (500) is a threaded hole (4022). The limiting screw (400) enters the first opening structure (401) and the second opening structure (402) from the outer surface of the fourth limiting part (202). The head of the limiting screw (400) sinks into the guide countersunk hole (4021) and limits the inner clamping ring (100) and the outer clamping ring (200) through the countersunk plate of the guide countersunk hole (4021). The threaded part of the limiting screw (400) enters the threaded hole (4022), and the tail of the limiting screw (400) enters the first opening structure (401). The limiting screw (400) matches the first opening structure (401) and the second opening.

8. The capsule clamping device according to claim 7, characterized in that: The tail of the limiting screw (400) is frustum-shaped, and the diameter of the tail of the limiting screw (400) gradually decreases in the direction away from the head of the limiting screw (400).

9. The capsule clamping device according to claim 1, characterized in that: The lower steel ring (600) is fixedly connected to the outer clamping ring (200) by screws; and / or, the inner clamping ring (100) is fixedly connected to the ring seat (500) by the trapezoidal thread on the inner surface.

10. A tire mold, characterized in that: The capsule clamping device includes any one of claims 1-9.

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