A central mechanism and vulcanizer

Abstract

The utility model discloses a center mechanism and vulcanizing machine, it belongs to tire vulcanization equipment technical field, and the center mechanism includes ring seat guide bushing, ring seat and upper ring connecting part, and ring seat guide bushing fixedly arranged, is for the ring seat up and down movement guide, still include upper ring drive mechanism and lower ring drive mechanism, lower ring drive mechanism includes lower ring lead screw, lower ring lead screw nut, drive seat and lower ring drive arrangement, and the upper end of lower ring lead screw is rotatably connected with ring seat, and the lower end is rotatably installed on drive seat, and lower ring drive arrangement sets up on drive seat, is used for driving lower ring lead screw rotation, and lower ring lead screw nut is fixed on ring seat guide bushing, and is connected with lower ring lead screw screw thread, and upper ring drive mechanism sets up on drive seat, and drives upper ring connecting part along with drive seat elevating, the center mechanism compact structure adopts servo motor to provide driving force, closed loop control, and vulcanizing machine positioning precision, control precision is high and has no oil liquid pollution's risk, and movement is reliable, can improve tire vulcanization quality.

Description

Technical Field

[0001] This utility model relates to the technical field of tire vulcanization equipment, specifically to a central mechanism and a vulcanizing machine. Background Technology

[0002] The central mechanism of the tire vulcanizing machine, also called the capsule control mechanism, is an important component of the shaping vulcanizing machine. Its function is to insert the capsule into the tire blank before vulcanization and to pull the capsule out of the tire after vulcanization. With the cooperation of the demolding mechanism, the tire is separated from the lower mold and detached from the tire bead.

[0003] Existing central mechanisms mostly use hydraulic cylinders for drive, which require a hydraulic station and hydraulic pipelines, occupying a large space and incurring high maintenance costs. Furthermore, hydraulic cylinders are prone to oil leakage during use, polluting the environment and affecting the stability of equipment operation. In addition, the control accuracy of the cylinders is affected by fluctuations in the temperature and pressure of the hydraulic oil, resulting in low motion accuracy. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a central mechanism and a vulcanizing machine. The central mechanism can be electrically driven, has a compact overall structure, and reduces the space occupied by the vulcanizing machine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a central mechanism, including a ring seat guide sleeve, a ring seat, and an upper ring connecting part. The ring seat guide sleeve is fixedly installed to guide the ring seat to move up and down. It also includes an upper ring driving mechanism and a lower ring driving mechanism.

[0007] The lower ring drive mechanism includes a lower ring screw, a lower ring screw nut, a drive seat, and a lower ring drive device; the upper end of the lower ring screw is rotatably connected to the ring seat, and the lower end is rotatably mounted on the drive seat; the lower ring drive device is disposed on the drive seat and is used to drive the lower ring screw to rotate; the lower ring screw nut is fixed on the ring seat guide sleeve and is threadedly connected to the lower ring screw.

[0008] The upper ring drive mechanism is mounted on the drive base, and moves up and down with the drive base to drive the upper ring connecting part.

[0009] In one of the aforementioned central mechanisms, an upper ring guide rod is fixedly provided between the drive seat and the ring seat, and the upper ring guide rod can be raised and lowered relative to the ring seat guide sleeve.

[0010] In one of the aforementioned central mechanisms, the upper ring drive mechanism includes an upper ring screw, an upper ring screw nut, an upper ring guide seat, a central rod, and an upper ring drive device.

[0011] The upper ring drive device is fixed on the drive base;

[0012] The lower end of the upper ring screw is rotatably mounted on the drive seat and is connected to the upper ring drive device.

[0013] The upper ring screw nut is fitted onto the upper ring screw and the two are threaded together.

[0014] The upper ring guide seat is slidably connected to the upper ring guide rod, and the upper ring guide seat is connected to the upper ring lead screw nut, and the two rise and fall synchronously;

[0015] The central rod is a hollow rod, and the upper ring screw is located inside the central rod; the lower end of the central rod is fixedly connected to the upper ring screw nut and / or the upper ring guide seat, and the upper end passes through the central hole of the ring seat and extends to the upper side of the ring seat to connect to the upper ring connecting part.

[0016] In one of the aforementioned central mechanisms, the upper ring drive device includes an upper ring motor and an upper ring reducer; the upper ring reducer is fixedly mounted on the drive base and is drivingly connected to the upper ring lead screw and the upper ring motor; the upper ring motor is directly connected to the upper ring reducer.

[0017] And / or, the central rod and the upper ring screw are concentrically arranged;

[0018] And / or, the lower end of the central rod is provided with a connecting sleeve, the upper end of the connecting sleeve is sleeved on the lower end of the central rod, the lower end is sleeved on the outside of the upper ring screw nut, and is fixedly connected to the upper ring guide seat;

[0019] And / or, the number of the upper ring guide rods is two.

[0020] In one of the aforementioned central mechanisms, the lower ring drive device includes a lower ring motor and a lower ring reducer. The lower ring reducer is fixedly installed on the lower side of the drive seat and is connected to the lower ring screw and the lower ring motor. The lower ring motor is directly connected to the lower ring reducer.

[0021] And / or, the lower ring screw nut is fixed on the ring seat guide sleeve by a lower ring nut seat; the lower ring nut seat is cylindrical, and the lower ring screw is located inside the lower ring nut seat.

[0022] In one of the aforementioned central mechanisms, the ring seat guide sleeve includes a first guide portion and a second guide portion that are fixedly connected as a single unit;

[0023] The first guide portion is a cylindrical shape with openings at both ends, and its inner surface guides the ring seat;

[0024] The second guide portion is located at the lower end of the first guide portion, and the second guide portion is provided with a lower ring guide rod hole that runs vertically through the second guide portion;

[0025] A lower ring guide rod is provided between the drive seat and the ring seat, and the lower ring guide rod is slidably disposed in the lower ring guide rod hole.

[0026] In one of the aforementioned central mechanisms, a bushing is provided between the lower ring guide rod and the lower ring guide rod hole;

[0027] And / or, the second guide portion is provided with an upper ring drive hole in the center for the upper ring drive mechanism to pass through; the upper ring drive hole is S-shaped;

[0028] And / or, the number of the lower ring guide rods is two.

[0029] In one of the aforementioned central mechanisms, there are two lower ring screws, which are driven by a synchronous transmission assembly, and one of the lower ring screws is connected to the lower ring drive device.

[0030] In one of the aforementioned central mechanisms, the drive base includes a bearing mounting plate and a reducer mounting plate, which are spaced apart vertically and fixedly connected by a plurality of mounting columns, forming a transmission cavity between the bearing mounting plate and the reducer mounting plate; the synchronous transmission assembly is located within the transmission cavity.

[0031] A vulcanizing machine, comprising the aforementioned central mechanism.

[0032] The beneficial effects of this utility model are as follows:

[0033] In the central mechanism of this design, the lower ring screw nut of the lower ring drive mechanism is fixed on the ring seat guide sleeve. When the lower ring screw is driven, the lower ring screw, drive seat, ring seat, upper ring drive mechanism, and upper ring connecting part rise and fall synchronously, constituting part of the stroke of the upper ring connecting part. The upper ring drive mechanism can also drive the upper ring connecting part to rise and fall, constituting another part of the stroke of the upper ring connecting part. The combination of the two strokes reduces the stroke design requirements of the upper ring drive mechanism, thereby reducing the overall height of the central mechanism and making the central mechanism structure compact.

[0034] The upper ring guide rod connects the drive seat and the ring seat, and is supported between the two, which improves the structural stability and ensures the stable and reliable operation of the lower ring screw.

[0035] The upper ring motor and the upper ring reducer, as well as the lower ring motor and the lower ring reducer, all adopt a direct drive form, which has a simple transmission structure, high transmission efficiency, and good stability.

[0036] The upper ring drive device has dual guidance: one is the sliding fit between the upper ring guide seat and the upper ring guide rod, and the other is the fit between the central rod and the ring seat. This dual guidance improves the movement accuracy of the upper ring connection. The lower ring drive device also has dual guidance: the sliding fit between the lower ring guide rod, the ring seat, and the ring seat guide sleeve ensures the movement accuracy of the ring seat. The vulcanizing machine has high control accuracy, which improves the vulcanization quality.

[0037] The application of bushings and self-lubricating bearings improves the operational stability of the vulcanizing machine, extends its service life, and makes maintenance simple and convenient.

[0038] The central mechanism is driven entirely by servo motors, and closed-loop control ensures the positioning accuracy of the vulcanizing machine. It has high control precision and no risk of oil contamination, making the movement reliable. It can improve the quality of tire vulcanization and eliminate the risk of hydraulic oil leakage, meeting the requirements of green manufacturing. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a central mechanism according to the present invention;

[0040] Figure 2 for Figure 1 A sectional view of section AA in the image;

[0041] Figure 3 for Figure 2 Sectional view of section BB;

[0042] Figure 4 for Figure 1 A magnified view of a portion of region D;

[0043] Figure 5 This is a partial cross-sectional view of the three-dimensional structure of a central mechanism according to the present invention.

[0044] In the picture:

[0045] 100 - Upper ring drive mechanism; 101 - Upper ring motor; 102 - Upper ring reducer; 103 - Upper ring lead screw; 104 - Upper ring guide seat; 105 - Upper ring lead screw nut; 106 - Connecting sleeve; 107 - Center rod;

[0046] 200-Lower ring drive mechanism; 201-Lower ring motor; 202-Lower ring reducer; 203-Reducer mounting plate; 204-Mounting column; 205-Bearing mounting plate; 206-Lower ring lead screw; 207-Lower ring guide rod; 208-Upper ring guide rod; 209-Lower ring lead screw nut; 210-Lower ring nut seat; 211-Shaft sleeve; 212-Synchronous belt; 213-Tensioner pulley; 214-Synchronous belt pulley; 215-Tensioner seat; 216-Surrounding plate;

[0047] 300 - Ring seat guide sleeve; 310 - First guide part; 320 - Second guide part; 321 - Lower ring screw hole; 322 - Upper ring drive hole; 323 - Lower ring guide rod hole;

[0048] 400 - Ring seat; 500 - Upper ring connecting part. Detailed Implementation

[0049] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0050] Firstly, please refer to Figures 1-5 This invention provides an embodiment of a central mechanism, comprising an upper ring drive mechanism 100, a lower ring drive mechanism 200, a ring seat guide sleeve 300, a ring seat 400, and an upper ring connecting part 500. The ring seat guide sleeve 300 is fixedly connected to the main body of the vulcanizing machine and remains stationary during operation. The lower ring drive mechanism 200 is located below the ring seat guide sleeve 300, and under its drive, the ring seat 400, the upper ring drive mechanism 100, and the upper ring connecting part 500 rise and fall together. Simultaneously, the upper ring drive mechanism 100 can also independently adjust the height of the upper ring connecting part 500. The vertical travel of the upper ring connecting part 500 is partly achieved by the lower ring drive mechanism 200, that is, when the lower ring drive mechanism 200 drives the ring seat 400, it also drives the upper ring drive mechanism 100 to move up or down; the other part is achieved by the upper ring drive mechanism 100, which independently drives the upper ring connecting part 500 to rise and fall. Therefore, this technical solution can reduce the stroke of the upper ring drive mechanism 100, reduce the height of the central mechanism, and thus reduce the space occupied in the vertical direction.

[0051] Specifically, the lower ring drive mechanism 200 includes a lower ring lead screw 206, a lower ring lead screw nut 209, a drive seat, and a lower ring drive device. The drive seat includes a bearing mounting plate 205 and a reducer mounting plate 203. Several mounting posts 204 are provided between the bearing mounting plate 205 and the reducer mounting plate 203. The upper end of each mounting post 204 is fixedly connected to the bearing mounting plate 205, and the lower end is fixedly connected to the reducer mounting plate 203.

[0052] Furthermore, the drive unit is also provided with a surrounding plate 216, which surrounds the bearing mounting plate 205 and the reducer mounting plate 203. The upper edge of the surrounding plate 216 is fixedly connected to the bearing mounting plate 205, and the lower edge is fixedly connected to the reducer mounting plate 203. A transmission cavity is formed inside the surrounding plate 216, the bearing mounting plate 205, and the reducer mounting plate 203.

[0053] The lower end of the lower ring screw 206 extends into the drive seat and is rotatably connected to the bearing mounting plate 205 via a bearing assembly. While there may be one lower ring screw 206, for operational stability considerations, two are preferred. The lower ends of both lower ring screws 206 extend into the transmission cavity and are driven by a synchronous transmission assembly. For example, as... Figure 4 As shown, the synchronous transmission assembly includes two synchronous pulleys 214 disposed within the transmission cavity, each fixed to one of the two lower ring screws 206. The two synchronous pulleys 214 are connected by a synchronous belt 212. A tensioning pulley 213 is also provided within the transmission cavity, mounted on the reducer mounting plate 203 via a tensioning seat 215. The tensioning pulley 213 tensions the synchronous belt 212, enabling the two lower ring screws 206 to rotate synchronously while maintaining control precision. Both the tensioning pulley 213 and the tensioning seat 215 are existing technologies and will not be described in detail here.

[0054] In addition, it is understandable that the synchronous transmission component can also be a chain drive, gear drive, or other scheme to achieve synchronous transmission of the two lower ring screws 206.

[0055] The lower ring drive device is used to drive the lower ring screw 206 to rotate. In a preferred embodiment, the lower ring drive device includes a lower ring motor 201 and a lower ring reducer 202. The lower ring motor 201 is driven by the lower ring reducer 202, preferably directly connected, resulting in a simple connection structure, high transmission efficiency, and stable transmission. The lower ring reducer 202 is located on the lower side of the reducer mounting plate 203 and fixed to it. There is only one lower ring motor 201 and one lower ring reducer 202. The lower ring reducer 202 is driven by one of the two lower ring screws 206; that is, both lower ring screws 206 are driven by one lower ring motor 201 simultaneously. This not only reduces the production cost of the lower ring drive mechanism 200 but also simplifies control, eliminating the need to consider synchronization issues between different motors and reducing space requirements. Furthermore, the lower ring reducer 202 outputs through a hollow shaft and is connected to the lower ring screw 206 via a key, reducing transmission components and simplifying the transmission structure.

[0056] like Figure 3 As shown, the ring seat guide sleeve 300 includes a first guide portion 310 and a second guide portion 320 fixedly connected as one unit; the first guide portion 310 is a cylindrical shape with open ends, and its inner surface guides the ring seat 400; the second guide portion 320 is located at the lower end of the first guide portion 310, and the second guide portion 320 is provided with a lower ring screw hole 321, an upper ring drive hole 322 and a lower ring guide rod hole 323 that pass through the second guide portion 320 vertically.

[0057] The upper end of the lower ring screw 206 passes through the lower ring screw hole 321 and is rotatably connected to the ring seat 400 located on the upper side of the second guide portion 320. Exemplarily, the upper end of the lower ring screw 206 is connected to the ring seat 400 by a bearing, preferably a self-lubricating bearing.

[0058] The lower ring screw nut 209 is fitted onto the outside of the lower ring screw 206, and the two are threaded together. The lower ring screw nut 209 is fixed to the ring seat guide sleeve 300 by the lower ring nut seat 210. Exemplarily, the lower ring nut seat 210 is cylindrical, and the lower ring screw 206 is located inside the lower ring nut seat 210; the lower end of the lower ring nut seat 210 is fitted onto the outside of the lower ring screw nut 209, and the two are fixedly connected by a flange, bolts, or other connecting structures; the upper end of the lower ring nut seat 210 is fixed to the second guide portion 320.

[0059] An upper ring guide rod 208 and a lower ring guide rod 207 are provided between the drive seat and the ring seat 400. The upper ends of the upper ring guide rod 208 and the lower ring guide rod 207 are fixedly connected to the ring seat 400, and the connection method can be threaded connection; the lower ends are fixedly connected to the bearing mounting plate 205, for example, by bolts, screws or other connecting parts for assembly and fixation. The number of upper ring guide rods 208 and lower ring guide rods 207 can be set according to actual needs, preferably two, that is, two upper ring guide rods 208 and two lower ring guide rods 207 are provided between the drive seat and the ring seat 400.

[0060] The lower ring guide rod 207 is slidably disposed within the lower ring guide rod hole 323 of the second guide portion 320; for example, Figure 3 As shown, the second guide portion 320 is provided with two lower ring guide rod holes 323, and the two lower ring guide rods 207 are slidably disposed in the two lower ring guide rod holes 323 respectively. Preferably, a bushing 211 is provided between the lower ring guide rod 207 and the lower ring guide rod hole 323, and the bushing 211 is a self-lubricating bushing or made of ultra-high molecular weight polyethylene material.

[0061] The upper ring guide rod 208 is located inside the upper ring drive hole 322. Driven by the lower ring screw 206, the upper ring guide rod 208 can rise and fall relative to the ring seat guide sleeve 300. The upper ring guide rod 208 cooperates with the upper ring drive mechanism 100 to guide and position the up and down movement of the upper ring connecting part 500 and the mold clamping ring fixed thereon. The upper ring drive mechanism 100 includes an upper ring screw 103, an upper ring screw nut 105, an upper ring guide seat 104, a center rod 107, and an upper ring drive device.

[0062] The lower ring screw 206 is offset from the upper ring screw 103. In the radial direction of the ring seat 400, the upper ring screw 103 is located inside the two lower ring screws 206. The lower end of the upper ring screw 103 is rotatably mounted on the drive seat; specifically, the upper ring screw 103 is rotatably connected to the bearing mounting plate 205 via a bearing assembly, and the bearing in this part is preferably a self-lubricating bearing.

[0063] The upper ring drive device includes an upper ring motor 101 and an upper ring reducer 102. The upper ring reducer 102 is fixedly mounted on the lower side of the reducer mounting plate 203. The upper ring motor 101 and the upper ring reducer 102 are driven by each other, preferably directly connected. The upper ring reducer 102 is driven by an upper ring lead screw 103; preferably, the upper ring reducer 102 outputs through a hollow shaft and is connected to the upper ring lead screw 103 through a flat key, which can reduce transmission components and simplify the transmission structure.

[0064] The upper ring screw nut 105 is fitted onto the outside of the upper ring screw 103 and the two are threaded together. Driven by the upper ring screw 103, the upper ring screw nut 105 moves up and down. The upper ring guide seat 104 is fixedly connected to the outer wall of the upper ring screw nut 105, and the two move up and down synchronously. The upper ring guide seat 104 is slidably engaged with the upper ring guide rod 208, ensuring that the upper ring screw nut 105 only moves up and down and does not rotate when the upper ring screw 103 rotates.

[0065] The center rod 107 is a hollow rod, and the upper ring screw 103 is located inside the center rod 107, preferably concentrically arranged with the center rod 107. The center rod 107 can center and correct the upper ring screw 103. The lower end of the center rod 107 is fixedly connected to the upper ring screw nut 105 or the upper ring guide seat 104 through the connecting sleeve 106. Specifically, the upper end of the connecting sleeve 106 is fitted onto the lower end of the center rod 107, and the lower end of the connecting sleeve 106 is fitted onto the outside of the upper ring screw nut 105 and fixedly connected to the upper ring guide seat 104. The upper end of the center rod 107 passes through the central hole of the ring seat 400 and extends to the upper side of the ring seat 400. The upper ring connecting part 500 is fixedly installed on the upper end of the center rod 107. A sealing ring, guide sleeve, and other components are provided between the center rod 107 and the central hole of the ring seat 400. This is an existing structure, and no corresponding improvement is involved in this application, so it will not be described in detail here.

[0066] Like the upper ring guide rod 208, the center rod 107 is also located within the upper ring drive hole 322; in other words, the upper ring drive hole 322 simultaneously accommodates two upper ring guide rods 208 and the center rod 107, allowing the upper ring guide rods 208 and the center rod 107 to move relative to the ring seat guide sleeve 300 during the lifting and lowering of the drive seat. The upper ring drive hole 322 can be designed in any shape; for example, the upper ring drive hole 322 is as follows: Figure 3The S-shape shown is located in the middle of the second guide section 320. The two lower ring screw holes 321 are located on both sides of the upper ring drive hole 322, and the two lower ring guide rod holes 323 are also located on both sides of the upper ring drive hole 322. The upper ring drive hole 322, the lower ring guide rod holes 323, and the upper ring drive hole 322 are evenly distributed on the second guide section 320, and the second guide section 320 has strong structural stability.

[0067] In actual use, the lower ring motor 201 is first controlled to drive the lower ring screw 206, which in turn drives the drive seat, ring seat 400, upper ring drive mechanism 100, and upper ring connecting part 500 upward. After the ring seat 400 reaches the set height, the upper ring motor 101 is then controlled to drive the upper ring screw 103, which in turn drives the upper ring screw nut 105, upper ring guide seat 104, and center rod 107 to continue upward. As needed, the upper ring guide seat 104 can be controlled to move through the upper ring drive hole 322 to the upper side of the second guide part 320. Furthermore, the upper ring motor 101 and lower ring motor 201 are preferably servo motors, which provide high control precision.

[0068] On the other hand, this utility model also provides a vulcanizing machine, including the aforementioned central mechanism.

[0069] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A central mechanism, comprising a ring seat guide sleeve (300), a ring seat (400), and an upper ring connecting portion (500), wherein the ring seat guide sleeve (300) is fixedly disposed to guide the up-and-down movement of the ring seat (400); characterized in that, It also includes an upper ring drive mechanism (100) and a lower ring drive mechanism (200). The lower ring drive mechanism (200) includes a lower ring screw (206), a lower ring screw nut (209), a drive seat, and a lower ring drive device; the upper end of the lower ring screw (206) is rotatably connected to the ring seat (400), and the lower end is rotatably mounted on the drive seat; the lower ring drive device is disposed on the drive seat and is used to drive the lower ring screw (206) to rotate; the lower ring screw nut (209) is fixed on the ring seat guide sleeve (300) and threadedly connected to the lower ring screw (206); The upper ring drive mechanism (100) is mounted on the drive seat, and moves up and down with the drive seat to drive the upper ring connecting part (500).

2. A central mechanism according to claim 1, characterized in that, An upper ring guide rod (208) is fixedly provided between the drive seat and the ring seat (400), and the upper ring guide rod (208) can be raised and lowered relative to the ring seat guide sleeve (300).

3. A central mechanism according to claim 2, characterized in that, The upper ring drive mechanism (100) includes an upper ring screw (103), an upper ring screw nut (105), an upper ring guide seat (104), a center rod (107), and an upper ring drive device; The upper ring drive device is fixed on the drive base; The lower end of the upper ring screw (103) is rotatably mounted on the drive seat and is connected to the upper ring drive device. The upper ring screw nut (105) is fitted onto the upper ring screw (103) and the two are threaded together; The upper ring guide seat (104) is slidably connected to the upper ring guide rod (208), and the upper ring guide seat (104) is connected to the upper ring screw nut (105), and the two move up and down synchronously; The central rod (107) is a hollow rod, and the upper ring screw (103) is located inside the central rod (107). The lower end of the central rod (107) is fixedly connected to the upper ring screw nut (105) and / or the upper ring guide seat (104), and the upper end passes through the central hole of the ring seat (400) and extends to the upper side of the ring seat (400) to connect to the upper ring connecting part (500).

4. A central mechanism according to claim 3, characterized in that, The upper ring drive device includes an upper ring motor (101) and an upper ring reducer (102); the upper ring reducer (102) is fixedly installed on the drive seat and is connected to the upper ring lead screw (103) and the upper ring motor (101); the upper ring motor (101) is directly connected to the upper ring reducer (102); And / or, the central rod (107) and the upper ring screw (103) are concentrically arranged; And / or, the lower end of the center rod (107) is provided with a connecting sleeve (106), the upper end of the connecting sleeve (106) is sleeved on the lower end of the center rod (107), the lower end is sleeved on the outside of the upper ring screw nut (105), and is fixedly connected to the upper ring guide seat (104). And / or, the number of the upper ring guide rods (208) is two.

5. A central mechanism according to claim 1, characterized in that, The lower ring drive device includes a lower ring motor (201) and a lower ring reducer (202). The lower ring reducer (202) is fixedly installed on the lower side of the drive seat and is connected to the lower ring screw (206) and the lower ring motor (201). The lower ring motor (201) is directly connected to the lower ring reducer (202). And / or, the lower ring screw nut (209) is fixed on the ring seat guide sleeve (300) by the lower ring nut seat (210); the lower ring nut seat (210) is cylindrical, and the lower ring screw (206) is located inside the lower ring nut seat (210).

6. A central mechanism according to claim 1, characterized in that, The ring seat guide sleeve (300) includes a first guide part (310) and a second guide part (320) that are fixedly connected as one unit. The first guide part (310) is a cylindrical shape with openings at both ends, and its inner surface guides the ring seat (400); The second guide portion (320) is located at the lower end of the first guide portion (310), and the second guide portion (320) is provided with a lower ring guide rod hole (323) that passes through the second guide portion (320) vertically. A lower ring guide rod (207) is provided between the drive seat and the ring seat (400), and the lower ring guide rod (207) is slidably disposed in the lower ring guide rod hole (323).

7. A central mechanism according to claim 6, characterized in that, A bushing (211) is provided between the lower ring guide rod (207) and the lower ring guide rod hole (323). And / or, the second guide portion (320) is provided with an upper ring drive hole (322) in the center for the upper ring drive mechanism (100) to pass through; the upper ring drive hole (322) is S-shaped; And / or, the number of the lower ring guide rods (207) is two.

8. A central mechanism according to claim 1, characterized in that, There are two lower ring screws (206), and the two lower ring screws (206) are driven by a synchronous transmission assembly. One of the lower ring screws (206) is connected to the lower ring drive device.

9. A central mechanism according to claim 8, characterized in that, The drive base includes a bearing mounting plate (205) and a reducer mounting plate (203). The bearing mounting plate (205) and the reducer mounting plate (203) are spaced apart vertically and fixedly connected by a plurality of mounting columns (204). A transmission cavity is formed between the bearing mounting plate (205) and the reducer mounting plate (203). The synchronous transmission assembly is located in the transmission cavity.

10. A vulcanizing machine, characterized in that, Includes the central institution as described in any one of claims 1-9.

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