A pressurized clamping mechanism and hydraulic vulcanizing machine

Abstract

The present invention relates to the technical field of tire production, and discloses a pressurized mold-locking mechanism and a hydraulic vulcanizer. The pressurized mold-locking mechanism includes a pressurized mold-adjusting assembly, a tie rod assembly, and a mold-locking assembly. The pressurized mold-adjusting assembly includes a pressurized mold-adjusting oil cylinder fixedly mounted on an upper support plate, a piston rod of the pressurized mold-adjusting oil cylinder passes through the upper support plate and extends downward, the tie rod assembly includes an upper tie rod and a lower tie rod that can be rotatably and detachably connected, the upper tie rod is fixedly connected to the piston rod, the lower tie rod passes through the lower support plate, and the mold-locking assembly is mounted on the lower support plate and driven to connect the lower tie rod. By arranging a pressurized mold-adjusting oil cylinder that has both pressurization and mold-adjusting functions on the upper support plate, the preset mold-adjusting stroke of the cylinder body can be adaptively adjusted according to different molds, thereby reducing the complexity of the entire pressurized mold-locking mechanism, and making the entire pressurized mold-locking mechanism small in size and light in weight.

Description

Technical Field

[0001] The invention relates to the technical field of tire production, and in particular to a pressurized mold locking mechanism and a hydraulic vulcanizer. Background Art

[0002] The clamping structures of existing tire vulcanizers include the following three types:

[0003] The side plate latch locking structure refers to inserting the latch into the side plate hole to achieve mold locking;

[0004] The locking ring mold locking structure means that the top of the upper locking ring seat is fixed on the upper support plate, the lower seat plate is fixed on the base, the locking ring is installed on the lower seat plate, and the locking ring and the upper locking ring seat have matching locking teeth. However, the above two locking structures cannot adapt to mold structures of different heights;

[0005] The column clamping plate clamping structure refers to a structure in which multiple annular grooves are provided on the column at the clamping position. When clamping the mold, the clamping plate is clamped in the annular groove on the column. It can adapt to mold structures of different heights. However, in order to ensure reliable clamping and improve the clamping force, the annular groove is usually deeper, so the column is relatively thick, making the entire vulcanizer large and bulky. Summary of the invention

[0006] Based on the above problems, an object of the present invention is to provide a pressurized clamping mechanism which has small size, light weight, high working efficiency and can adapt to mold structures of different heights.

[0007] Based on the above problems, another object of the present invention is to provide a hydraulic vulcanizer with simple structure, convenient operation, low cost, and can be used for vulcanization operations of tires of various specifications and has a wide range of applications.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A pressurized mold-locking mechanism is used to fix an upper support plate and a lower support plate during vulcanization operation of a hydraulic vulcanizer, and the pressurized mold-locking mechanism comprises:

[0010] A pressurized mold adjustment component comprises a pressurized mold adjustment oil cylinder fixedly mounted on the upper support plate, wherein a piston rod of the pressurized mold adjustment oil cylinder passes through the upper support plate and extends downward;

[0011] A pull rod assembly, comprising an upper pull rod and a lower pull rod which are rotatably and detachably connected, wherein the upper pull rod is fixedly connected to the piston rod, and the lower pull rod passes through the lower support plate;

[0012] The mold locking assembly is installed on the lower supporting plate and is used to drive the lower pull rod to rotate.

[0013] As an optional solution of the pressurized clamping mechanism of the present invention, one of the upper pull rod and the lower pull rod has a plurality of protrusions evenly distributed in the circumferential direction at its end, and the other has a plurality of grooves evenly distributed in the circumferential direction at its end with the same number of protrusions as the number of the protrusions, and the upper pull rod and the lower pull rod are rotatably and detachably connected via the protrusions and the grooves.

[0014] As an optional solution of the pressurized locking mechanism of the present invention, the locking assembly includes a locking drive device, a locking drive rod and a locking plate connected in sequence, the locking plate is fixedly connected to the lower pull rod, and the locking drive device drives the lower pull rod to rotate through the locking drive rod and the locking plate.

[0015] As an optional solution of the pressurized mold clamping mechanism of the present invention, a limiting member is provided on a side of the lower supporting plate close to the upper supporting plate, and the upper pull rod can abut against the limiting member.

[0016] As an optional solution of the pressurized mold locking mechanism of the present invention, a mold closing detection module is provided on the limit member.

[0017] As an optional solution of the pressurized mold locking mechanism of the present invention, the pressurized mold adjustment assembly also includes a guide sleeve that slidably cooperates with the upper pull rod, and the guide sleeve is installed on a side of the upper support plate close to the lower support plate.

[0018] As an optional solution of the pressurized mold clamping mechanism of the present invention, the guide sleeve is provided with a guide key, the upper pull rod is provided with a guide groove extending along its axial direction, and the guide key is slidably matched with the guide groove.

[0019] A hydraulic vulcanizer comprises a frame, an upper support plate, a lower support plate, and an opening and closing mold assembly. The lower support plate is connected to the frame, the opening and closing mold assembly is installed on the lower support plate and drives the upper support plate to move up and down. The hydraulic vulcanizer also includes multiple groups of pressurized clamping mechanisms as described above.

[0020] As an optional solution of the hydraulic vulcanizer of the present invention, it also includes a guide assembly, which includes a guide rod and a guide cylinder. The guide cylinder is arranged on the upper support plate, one end of the guide rod is arranged on the lower support plate, and the other end movably passes through the guide cylinder.

[0021] As an optional solution of the hydraulic vulcanizer of the present invention, the mold opening and closing assembly includes a mold opening and closing drive component, a first mounting seat and a second mounting seat, the output rod of the mold opening and closing drive component is fixedly connected to the upper support plate through the first mounting seat, and the shell of the mold opening and closing drive component is fixedly connected to the lower support plate through the second mounting seat.

[0022] The beneficial effects of the present invention are:

[0023] The pressurized mold-locking mechanism provided by the present invention is used to fix the upper support plate and the lower support plate during the vulcanization operation of the hydraulic vulcanizer, and the upper mold and the lower mold of the tire processing mold are placed on the upper support plate and the lower support plate respectively. When the mold closing starts, the lower support plate is fixed, the upper support plate descends, and drives the upper pull rod to move close to the lower pull rod. At this time, the pressurized mold-adjusting cylinder is in a free state, and the piston rod is fully extended; when the upper pull rod approaches the lower pull rod and contacts the limiter, the mold closing is completed; at this time, the mold-locking assembly on the lower support plate drives the lower pull rod to rotate, so that the lower pull rod and the upper pull rod are locked to complete the mold locking action; then the upper support plate continues to descend, and because the pressurized mold-adjusting cylinder is in a free state, the piston rod is driven by the upper pull rod to compress the rodless cavity under the reaction force of the limiter to perform the mold adjustment action. When the preset mold adjustment height is reached, the upper support plate stops descending to complete the mold adjustment action. After the mold is in place, the tire vulcanization operation is carried out. The impact force generated during the tire vulcanization process acts between the upper support plate and the lower support plate. The piston rod is pressurized by the pressurized mold adjustment cylinder, so that the piston rod has a tendency to slide upward, offsetting the impact force generated by the tire vulcanization, avoiding the upper mold and the lower mold from separating, and completing the pressurization action. The mold adjustment stroke of the hydraulic vulcanizer preset in the cylinder body can be adaptively adjusted according to different molds. The pressurization action and the mold adjustment action can be completed by sharing the same pressurized mold adjustment cylinder, which reduces the complexity of the entire pressurized mold clamping mechanism, making the entire pressurized mold clamping mechanism small in size, light in weight, and high in working efficiency, and is suitable for mold structures of different heights.

[0024] The hydraulic vulcanizer provided by the present invention has a lower support plate connected to a frame, a mold opening and closing assembly installed on the lower support plate, and drives the upper support plate to move up and down, and a plurality of groups of the above-mentioned pressurized mold locking mechanisms are distributed between the upper support plate and the lower support plate, thereby ensuring uniformity of force when the mold is closed, improving tire molding quality, and extending the service life of the mold. The mold adjustment stroke of the hydraulic vulcanizer preset in the cylinder body can be adaptively adjusted according to different molds, and the pressurizing action and the mold adjustment action can be completed by sharing the same pressurized mold adjustment oil cylinder, thereby reducing the complexity of the entire hydraulic vulcanizer and facilitating operation; and the entire hydraulic vulcanizer has a small size, light weight, and low processing cost, and can be used for vulcanization operations of tires of various specifications, with a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of a hydraulic vulcanizer including a pressurized mold clamping mechanism provided by a specific embodiment of the present invention at a first viewing angle;

[0027] Figure 2 is a structural schematic diagram of a hydraulic vulcanizer including a pressurized mold clamping mechanism provided by a specific embodiment of the present invention at a second viewing angle;

[0028] Figure 3 It is a structural schematic diagram of a pressurized mold adjustment assembly and a tie rod assembly provided in a specific embodiment of the present invention;

[0029] Figure 4 It is a cross-sectional schematic diagram of a pressurized mold adjustment assembly and a tie rod assembly provided in a specific embodiment of the present invention;

[0030] Figure 5 It is a schematic structural diagram of a tie rod assembly and a clamping assembly provided in a specific embodiment of the present invention.

[0031] In the figure:

[0032] 1-upper support plate; 2-lower support plate; 3-pressurizing mold adjustment assembly; 4-tie rod assembly; 5-locking assembly; 6-limit

[0033] Parts; 7-opening and closing mold assembly; 8-guide assembly;

[0034] 31- pressurized mold adjustment cylinder; 32- guide sleeve; 33- heat insulation board;

[0035] 311-cylinder body; 312-piston rod; 313-rod chamber; 314-rodless chamber;

[0036] 321-guide key;

[0037] 41-upper pull rod; 42-lower pull rod; 43-protrusion; 44-groove; 45-sliding sleeve; 46-locking ring;

[0038] 411-guide groove; 412-clamp ring;

[0039] 51-mold locking drive device; 52-mold locking drive rod; 53-mold locking plate; 54-fixed bracket;

[0040] 61- mold detection module;

[0041] 71- opening and closing mold driving member; 72- first mounting seat; 73- second mounting seat;

[0042] 81 - guide rod; 82 - guide cylinder. DETAILED DESCRIPTION

[0043] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] like Figures 1 to 5 As shown, this embodiment provides a pressurized clamping mechanism for fixing an upper support plate 1 and a lower support plate 2 of a hydraulic vulcanizer during vulcanization operation, on which an upper mold and a lower mold of a tire processing mold are placed respectively. The pressurized mold-locking mechanism includes a pressurized mold-adjusting component 3, a tie rod component 4 and a mold-locking component 5. The pressurized mold-adjusting component 3 includes a pressurized mold-adjusting cylinder 31 fixedly mounted on the upper support plate 1. The cylinder body 311 of the pressurized mold-adjusting cylinder 31 presets the mold-adjusting stroke of the hydraulic vulcanizer, and can adaptively adjust the distance between the upper support plate 1 and the lower support plate 2 during the vulcanization operation according to the different specifications of the vulcanized tire. The piston rod 312 of the pressurized mold-adjusting cylinder 31 extends downward through the upper support plate 1. The tie rod component 4 includes an upper tie rod 41 and a lower tie rod 42 that are rotatably and detachably connected. The upper tie rod 41 is fixedly connected to the piston rod 312, and the lower tie rod 42 passes through the lower support plate 2. The mold-locking component 5 is installed on the lower support plate 2 and is used to drive the lower tie rod 42 to rotate to complete the mold-locking action.

[0047] like Figure 4As shown, the piston rod 312 divides the inner cavity of the cylinder body 311 into a rod cavity 313 and a rodless cavity 314. When the pressure of the rod cavity 313 is greater than the pressure of the rodless cavity 314, the piston rod 312 retracts under the action of the pressure difference, and the cylinder body 311 applies a force to the upper support plate 1. At the same time, the lower pull rod 42 locked with the upper pull rod 41 applies a force to the lower support plate 2 to lock the upper support plate 1 and the lower support plate 2, thereby realizing the pressurization action.

[0048] like Figure 4 As shown, optionally, a limit member 6 is provided on one side of the lower support plate 2 close to the upper support plate 1, and the upper pull rod 41 can abut against the limit member 6. The limit member 6 can be a tubular structure, sleeved on the outer peripheral side of the lower pull rod 42, and the limit member 6 adopts a mechanical limit method to realize hard limit of the upper pull rod 41, thereby solving the problem of synchronous drive of multiple pressurized clamping mechanisms.

[0049] At the beginning of mold closing, the lower support plate 2 is fixed, the upper support plate 1 descends, and drives the upper tie rod 41 to move close to the lower tie rod 42. At this time, the pressurized mold adjustment cylinder 31 is in a free state, and the piston rod 312 is fully extended; when the upper tie rod 41 approaches the lower tie rod 42 and contacts the limiter 6, the mold closing is completed; at this time, the mold locking assembly 5 on the lower support plate 2 drives the lower tie rod 42 to rotate, so that the lower tie rod 42 is locked with the upper tie rod 41, and the mold locking action is completed; then, the upper support plate 1 continues to descend, and since the pressurized mold adjustment cylinder 31 is in a free state, the limiter 6 Under the reaction force, the piston rod 312 is driven by the upper pull rod 41 to compress the rodless cavity 314 to adjust the mold. When the preset mold adjustment height is reached, the upper support plate 1 stops descending to complete the mold adjustment. After the mold is in place, the tire vulcanization operation is carried out. The impact force generated during the tire vulcanization process acts between the upper support plate 1 and the lower support plate 2. The piston rod 312 is pressurized by the pressurized mold adjustment cylinder 31, so that the piston rod 312 has a tendency to slide upward, which offsets the impact force generated by the tire vulcanization, avoids the upper mold and the lower mold from separating, and completes the pressurization action.

[0050] The above-mentioned mold locking action and mold adjusting action can be adjusted in order.

[0051] Since the vulcanization temperature of the vulcanizer during vulcanization operation is relatively high, in order to prevent heat from being transferred to the pressurized mold-adjusting cylinder 31 and affecting its life and air tightness, the pressurized mold-adjusting assembly 3 also includes a heat insulation plate 33, which is arranged between the upper support plate 1 and the cylinder body 311 of the pressurized mold-adjusting cylinder 31 to prevent heat transfer between the two.

[0052] like Figure 3As shown, in this embodiment, one of the upper rod 41 and the lower rod 42 has a plurality of protrusions 43 evenly distributed in the circumferential direction at the end thereof, and the other has a plurality of grooves 44 evenly distributed in the circumferential direction with the same number of protrusions 43 at the end thereof, and the upper rod 41 and the lower rod 42 are rotatably detachably connected through the protrusions 43 and the grooves 44. The plurality of protrusions 43 evenly distributed in the circumferential direction are in a spline shape or a plum blossom tooth shape as a whole, and the plurality of grooves 44 evenly distributed in the circumferential direction are in a spline groove shape as a whole. When the lower rod 42 is rotated, the protrusions 43 can be aligned with the grooves 44, or interfere with the grooves 44, thereby realizing a rotatable detachable connection between the upper rod 41 and the lower rod 42. In other embodiments, the number of protrusions 43 and grooves 44 may be inconsistent, for example, the number of protrusions 43 and grooves 44 may be in a multiple relationship.

[0053] like Figure 2 and Figure 5 As shown, the mold locking assembly 5 may include a mold locking drive device 51, a mold locking drive rod 52 and a mold locking plate 53 connected in sequence, the mold locking plate 53 is fixedly connected to the lower pull rod 42, and the mold locking drive device 51 drives the lower pull rod 42 to rotate through the mold locking drive rod 52 and the mold locking plate 53. The mold locking drive device 51 can be a cylinder, an electric cylinder or an oil cylinder. When there are multiple groups of the above-mentioned pressurized mold locking mechanisms distributed between the upper support plate 1 and the lower support plate 2, the mold locking drive device 51 can drive more than two mold locking plates 53 through the mold locking drive rod 52 to achieve synchronous mold locking action. The mold locking assembly 5 also includes a fixed bracket 54, which is fixedly arranged on the lower support plate 2 and is used to install the mold locking drive device 51.

[0054] like Figure 3 As shown, optionally, a mold clamping detection module 61 is provided on the limiter 6. The mold clamping detection module 61 is used to detect whether the upper pull rod 41 is in contact with the limiter 6, and then determine whether the upper pull rod 41 and the lower pull rod 42 are in a mold clamping action. The mold clamping detection module 61 can be a detection instrument such as a proximity switch. When there are multiple groups of the above-mentioned pressurized mold clamping mechanisms distributed between the upper support plate 1 and the lower support plate 2, the mold clamping action is completed by jointly determining through multiple mold clamping detection modules 61, that is, when the mold clamping detection modules 61 in the multiple groups of pressurized mold clamping mechanisms are all in a determined state, the mold clamping assembly 5 can drive the lower pull rod 42 to perform the mold clamping action, thereby avoiding equipment damage or safety accidents caused by the multiple groups of pressurized mold clamping mechanisms not being in a synchronized mold clamping state, thereby improving the safety of the overall equipment.

[0055] like Figure 4As shown, optionally, the pressurized mold adjustment assembly 3 further includes a guide sleeve 32 that is slidably matched with the upper tie rod 41, and the guide sleeve 32 is installed on the side of the upper support plate 1 close to the lower support plate 2. The guide sleeve 32 is fixedly installed on the upper support plate 1 by bolts. In this example, the upper tie rod 41 is a hollow columnar structure, the inner wall of the upper tie rod 41 is fixedly connected to the piston rod 312, and the outer wall of the upper tie rod 41 is slidably connected to the guide sleeve 32. A retaining ring 412 is provided at the upper end of the upper tie rod 41, and the retaining ring 412 can abut against the shoulder structure on the piston rod 312 to limit the threaded fit between the upper tie rod 41 and the piston rod 312.

[0056] like Figure 4 As shown, in order to prevent the upper pull rod 41 from rotating circumferentially relative to the guide sleeve 32, optionally, a guide key 321 is provided on the guide sleeve 32, and a guide groove 411 extending along its axial direction is provided on the upper pull rod 41, and the guide key 321 is slidably engaged with the guide groove 411.

[0057] In order to reduce the friction resistance when the lower pull rod 42 rotates, the lower pull rod 42 passes through the lower support plate 2, and a sliding sleeve 45 is provided between the lower pull rod 42 and the lower support plate 2. The sliding sleeve 45 can be a copper sleeve to reduce the friction resistance. In order to prevent the lower pull rod 42 from being separated from the lower support plate 2, a locking ring 46 is fixedly provided on the lower support plate 2, and the locking ring 46 is clamped with the lower pull rod 42. Specifically, a circumferential clamping groove is provided on the lower pull rod 42, and the locking ring 46 is installed in the clamping groove. Further preferably, the locking ring 46 is an annular structure composed of two semicircular rings to facilitate assembly.

[0058] The pressurizing and mold-locking mechanism provided in this embodiment has a cylinder body 311 with a preset mold adjustment stroke of the hydraulic vulcanizer, which can be adaptively adjusted according to different molds. The pressurizing action and the mold adjustment action can be completed by sharing the same pressurizing and mold-adjusting oil cylinder 31, which reduces the complexity of the entire pressurizing and mold-locking mechanism and makes the entire pressurizing and mold-locking mechanism small in size and light in weight.

[0059] like Figures 1 to 5 As shown, this embodiment also provides a hydraulic vulcanizer, which includes a frame, an upper support plate 1, a lower support plate 2, and an opening and closing mold assembly 7. The lower support plate 2 is connected to the frame, and the opening and closing mold assembly 7 is installed on the lower support plate 2 and drives the upper support plate 1 to move up and down. The hydraulic vulcanizer also includes multiple groups of the above-mentioned pressurized locking mechanisms.

[0060] like Figure 1 and Figure 2 As shown, in order to maintain the stability of the upper support plate 1 and the lower support plate 2 when the mold is closed, preferably, the hydraulic vulcanizer also includes a guide assembly 8, the guide assembly 8 includes a guide rod 81 and a guide cylinder 82, the guide cylinder 82 is arranged on the upper support plate 1, one end of the guide rod 81 is arranged on the lower support plate 2, and the other end movably passes through the guide cylinder 82. The guide rod 81 can be a smooth rod, and the guide cylinder 82 can be a linear bearing to reduce the friction resistance when the two are matched.

[0061] Optionally, the mold opening and closing assembly 7 includes a mold opening and closing driving member 71, a first mounting seat 72 and a second mounting seat 73. The output rod of the mold opening and closing driving member 71 is fixedly connected to the upper support plate 1 through the first mounting seat 72, and the housing of the mold opening and closing driving member 71 is fixedly connected to the lower support plate 2 through the second mounting seat 73. The mold opening and closing driving member 71 can be a cylinder, an electric cylinder or an oil cylinder. The output rod of the mold opening and closing driving member 71 moves relative to the housing to move up and down, thereby realizing the mold closing and opening actions of the upper and lower molds.

[0062] The hydraulic vulcanizer provided in this embodiment has multiple groups of the above-mentioned pressurizing and clamping mechanisms distributed between the upper support plate 1 and the lower support plate 2, which ensures the uniformity of force when the mold is closed, improves the tire molding quality, and extends the service life of the mold. The cylinder body 311 presets the mold adjustment stroke of the hydraulic vulcanizer and can be adaptively adjusted according to different molds. The pressurizing action and the mold adjustment action can be completed by sharing the same pressurizing and mold adjustment cylinder 31, which reduces the complexity of the entire hydraulic vulcanizer and makes the entire hydraulic vulcanizer small in size and light in weight.

[0063] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pressurized mold clamping mechanism, used to fix an upper support plate (1) and a lower support plate (2) during vulcanization operation in a hydraulic vulcanizer, characterized in that: The pressurized mold clamping mechanism comprises: A pressurized mold adjustment component (3) comprises a pressurized mold adjustment oil cylinder (31) fixedly mounted on the upper support plate (1), wherein a piston rod (312) of the pressurized mold adjustment oil cylinder (31) passes through the upper support plate (1) and extends downward; A pull rod assembly (4), comprising an upper pull rod (41) and a lower pull rod (42) which are rotatably and detachably connected, wherein the upper pull rod (41) is a hollow columnar structure, the inner side wall of the upper pull rod (41) is fixedly connected to the piston rod (312), and the lower pull rod (42) passes through the lower support plate (2); A mold locking assembly (5) is mounted on the lower support plate (2) and is used to drive the lower pull rod (42) to rotate; A limiting member (6) is arranged on a side of the lower support plate (2) close to the upper support plate (1), and the upper pull rod (41) can abut against the limiting member (6); the limiting member (6) is a tubular structure, which is sleeved on the outer peripheral side of the lower pull rod (42), and the limiting member (6) adopts a mechanical limiting method to achieve hard limiting of the upper pull rod (41).

2. The pressurized mold clamping mechanism according to claim 1, characterized in that: One of the upper pull rod (41) and the lower pull rod (42) has a plurality of protrusions (43) evenly distributed in the circumferential direction at its end, and the other has a plurality of grooves (44) evenly distributed in the circumferential direction at its end, the number of which is the same as the number of the protrusions (43). The upper pull rod (41) and the lower pull rod (42) are rotatably and detachably connected via the protrusions (43) and the grooves (44).

3. The pressurized mold clamping mechanism according to claim 2, characterized in that: The mold locking assembly (5) comprises a mold locking drive device (51), a mold locking drive rod (52) and a mold locking plate (53) which are connected in sequence, the mold locking plate (53) is fixedly connected to the lower pull rod (42), and the mold locking drive device (51) drives the lower pull rod (42) to rotate via the mold locking drive rod (52) and the mold locking plate (53).

4. The pressurized mold clamping mechanism according to claim 1, characterized in that: The limiting member (6) is provided with a mold closing detection module (61).

5. The pressurized mold clamping mechanism according to claim 1, characterized in that: The pressurized mold adjustment assembly (3) also includes a guide sleeve (32) that slidably cooperates with the upper pull rod (41), and the guide sleeve (32) is installed on a side of the upper support plate (1) close to the lower support plate (2).

6. The pressurized mold clamping mechanism according to claim 5, characterized in that: The guide sleeve (32) is provided with a guide key (321), the upper pull rod (41) is provided with a guide groove (411) extending along its axial direction, and the guide key (321) is slidably matched with the guide groove (411).

7. A hydraulic vulcanizing machine, comprising a frame, an upper support plate (1), a lower support plate (2), and a mold opening and closing assembly (7), wherein the lower support plate (2) is connected to the frame, and the mold opening and closing assembly (7) is mounted on the lower support plate (2) and drives the upper support plate (1) to move up and down, characterized in that: The hydraulic vulcanizer also includes a plurality of groups of pressurized mold-locking mechanisms as described in any one of claims 1-6.

8. The hydraulic vulcanizing press according to claim 7, characterized in that: The invention also comprises a guide assembly (8), wherein the guide assembly (8) comprises a guide rod (81) and a guide cylinder (82), wherein the guide cylinder (82) is arranged on the upper support plate (1), and one end of the guide rod (81) is arranged on the lower support plate (2), and the other end movably passes through the guide cylinder (82).

9. The hydraulic vulcanizing press according to claim 7, characterized in that: The mold opening and closing assembly (7) comprises a mold opening and closing driving component (71), a first mounting seat (72) and a second mounting seat (73); the output rod of the mold opening and closing driving component (71) is fixedly connected to the upper support plate (1) via the first mounting seat (72); and the shell of the mold opening and closing driving component (71) is fixedly connected to the lower support plate (2) via the second mounting seat (73).

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