A self-locking pressurizing mechanism and a tire vulcanizer

Abstract

The present invention discloses a self-locking pressurizing mechanism, which is used to pressurize a tire mold in a tire vulcanizer, and includes a base, a cross beam, a mold clamping pull rod and a mold locking device; a tire mold is clamped between the base and the cross beam, and an inclined through hole is provided on the mold clamping pull rod, and the inclined through hole at least includes one hole inclined surface; along the axial direction of the inclined through hole, the distances between any two points on the hole inclined surface and the base are not the same or the distances from the cross beam are not the same; the mold locking device includes a plug rod for entering and exiting the inclined through hole to lock or unlock the base and the cross beam. By setting the inclined through hole and the plug rod, the present invention can not only drive the mold clamping pull rod to tighten the base and the cross beam so as to pressurize the tire mold, but also self-lock the pressurizing mechanism through its own structural characteristics without the need to be maintained by hydraulic pressure. Therefore, once the self-locking pressurizing mechanism is completely self-locked, there is no need to worry about the serious consequences caused by hydraulic oil leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of tire vulcanizing equipment, and particularly relates to a self-locking pressurizing mechanism and a tire vulcanizer. Background Art

[0002] With the rapid development of the automotive industry, the demand for tires has always been relatively strong, which has driven the technological innovation of tire vulcanizers. Due to problems such as deflection deformation of the upper crossbeam and the base during mold clamping, uneven clamping force, low clamping accuracy, and low production efficiency in mechanical tire vulcanizers, they have gradually withdrawn from the historical stage, and have been replaced by hydraulic tire vulcanizers with more superior performance.

[0003] In a hydraulic tire vulcanizer, the pressurizing mechanism provides a clamping force for the tire vulcanizing mold during the working process of the tire vulcanizer. Therefore, the quality of the pressurizing process control will directly affect the production quality of the tires. Therefore, it is particularly important to improve the pressurizing reliability, stability, and synchronism of the tire vulcanizer.

[0004] In the prior art, on a hydraulic tire vulcanizer, a large-sized clamping cylinder is usually adopted, and pressurization is carried out by directly tightening with oil pressure. This pressurization method always has the following risks:

[0005] 1) It is impossible to completely overcome the mold opening caused by oil leakage in the cylinder, valve, and pipeline.

[0006] 2) Once there is leakage in the cylinder, valve, or pipeline, and the oil cannot be replenished in time, the upper and lower molds will open due to internal pressure, the tire will produce flash, and in severe cases, the bladder will burst.

[0007] Therefore, the technical field requires a pressurizing mechanism with a simple configuration, stable and reliable pressurizing and clamping, and not easily automatically opening due to pressure loss in an uncontrolled state. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention proposes a self-locking pressurizing mechanism with a simple configuration, stable and reliable pressurizing and clamping, and can effectively avoid automatically opening due to pressure loss caused by hydraulic pipeline leakage.

[0009] In order to achieve the above object, the technical solution of the present invention is as follows:

[0010] On the one hand, the present invention discloses a self-locking pressurizing mechanism for pressurizing a tire mold in a tire vulcanizer. The self-locking pressurizing mechanism includes a base and a crossbeam, with a tire mold clamped between the base and the crossbeam. The self-locking pressurizing mechanism further includes: a clamping rod and a clamping device;

[0011] The mold clamping tie rod is used to connect the base and the cross beam; a bevel through hole is provided on the mold clamping tie rod, and the bevel through hole includes at least one hole bevel; along the axial direction of the bevel through hole, the distances from any two points on the hole bevel to the base are not the same or the distances to the cross beam are not the same;

[0012] The mold clamping device is correspondingly configured with the bevel through hole. The mold clamping device includes a plug rod, and the plug rod is used to enter and exit the bevel through hole to lock or unlock the base and the cross beam.

[0013] The beneficial effects of adopting the above technical solution are as follows: fully considering the problems existing in the prior art of using the hydraulic direct tensioning and pressurizing mechanism, such as the inability to completely overcome the mold opening caused by oil leakage, the generation of flash on the tire, and even the explosion of the bladder. A bevel through hole is provided on the mold clamping tie rod, and a plug rod is provided in the mold clamping device. By the plug rod entering and exiting the bevel through hole, not only can the mold clamping tie rod be driven to tighten the base and the cross beam, so as to pressurize the tire mold, but also the pressurizing mechanism can be self-locked through its own structural characteristics and does not need to be maintained by hydraulic pressure. Therefore, once the self-locking pressurizing mechanism is completely self-locked, the tire mold after mold clamping will never open, thus eliminating the worry about the serious consequences brought by hydraulic oil leakage.

[0014] As a further improvement of the technical solution of the present invention, at least one end of the two ends of the mold clamping tie rod passes through the base and can reciprocate telescopically; the bevel through hole is provided at the end of the mold clamping tie rod passing through the base, and the bevel through hole is located on the bottom surface of the base facing away from the tire mold.

[0015] The beneficial effects of adopting the above technical solution are as follows: the bevel through hole is arranged at one end of the mold clamping tie rod close to the bottom of the base. On the one hand, it is convenient to configure the mold clamping device. On the other hand, it avoids the influence of the tire mold on the mold clamping device during the process of mold clamping or unlocking the mold, and promotes the durability of the mold clamping device.

[0016] As a further improvement of the technical solution of the present invention, the mold clamping device further includes a guide seat and a driving unit. The guide seat is provided with a mold clamping tie rod through hole and a plug rod through hole. The guide seat is sleeved around the mold clamping tie rod through the mold clamping tie rod through hole and fixedly connected to the bottom surface of the base. One end of the plug rod is aligned with the plug rod through hole, and the other end of the plug rod is connected to the driving unit. The driving unit is fixedly connected to the base and is used to provide driving force for the telescopic movement of the plug rod.

[0017] The beneficial effects of adopting the above technical solution are as follows: The setting of the guiding seat, firstly, provides a reaction force and support for the driving of the die-locking pull rod to move axially during the telescopic process of the insertion rod; more importantly, the through-hole of the die-locking pull rod provides directional guidance for the axial movement of the die-locking pull rod, which can effectively prevent the die-locking pull rod from deviating during the forced movement, thereby causing a large die-clamping error in the tire mold and affecting the quality of the tire finished product.

[0018] As a further improvement of the technical solution of the present invention, the insertion rod includes a locking straight surface section and a driving inclined surface section. One end of the locking straight surface section is connected to the driving unit, the other end of the locking straight surface section is fixedly connected to the driving inclined surface section, and the driving inclined surface section is provided with a rod inclined surface matching the hole inclined surface.

[0019] The beneficial effects of adopting the above technical solution are as follows: The combined setting of the locking straight surface section and the driving inclined surface section can gradually realize the driving and locking of the die-locking pull rod according to the inserted position during the telescopic process of the insertion rod. The structural configuration is simple. On the premise of realizing the dual functions of driving and locking, the configuration cost of the self-locking pressurizing mechanism is greatly reduced, and the market competitiveness of the equipment is improved.

[0020] As a further improvement of the technical solution of the present invention, a lubricating structure is provided on the rod inclined surface of the driving inclined surface section, and the lubricating structure is used to store lubricant and convey it to the rod inclined surface.

[0021] The beneficial effects of adopting the above technical solution are as follows: The setting of the lubricating structure is convenient for providing lubricant between the mutually rubbing hole inclined surface and rod inclined surface, which can significantly reduce the surface friction force between the insertion rod and the die-locking pull rod. Thus, on the premise of not affecting the driving and locking functions of the insertion rod on the die-locking pull rod, the driving force required for the insertion rod to enter and exit the inclined surface through-hole is effectively reduced, and a driving unit with a smaller power can be selected, reducing energy consumption.

[0022] As a further improvement of the technical solution of the present invention, the lubricating structure includes a lubricant supply chamber, a supply channel, an oil storage groove, and an outflow hole. The lubricant supply chamber is opened above the driving inclined surface section. There are multiple oil storage grooves, and the multiple oil storage grooves are opened in the rod inclined surface along the direction perpendicular to the axis of the insertion rod. Each oil storage groove is communicated with the lubricant supply chamber through at least one supply channel, and each oil storage groove is communicated with multiple outflow holes, and the outlet of the outflow hole is arranged on the rod inclined surface.

[0023] The beneficial effects of adopting the above technical solution are as follows: The lubricant supply chamber can store a certain amount of lubricant and transport it to the oil storage tank near the rod inclined surface through the supply channel. A plurality of outflow holes are arranged between the oil storage tank and the rod inclined surface. To improve the uniformity of lubrication, the outflow holes are evenly arranged. Since the aperture of the outflow holes is very small, under normal conditions, micro lubricant drops are formed at the outlets of the outflow holes. During the process of the insertion rod being inserted into the inclined through hole to drive the toggle tie rod to move, a uniform lubricating layer is formed between the mutually rubbing rod inclined surface and hole inclined surface by the lubricant drops, so as to reduce the surface friction force between the insertion rod and the toggle tie rod. The setting of the lubricant supply chamber can meet the stable supply of lubricant within a certain relatively long period, effectively extend the lubricant replenishment cycle, and reduce the number of shutdowns.

[0024] As a further improvement of the technical solution of the present invention, a limit shoulder is provided on the toggle tie rod near the inclined through hole, and the limit shoulder is used to limit the telescopic distance of the toggle tie rod relative to the guide seat.

[0025] The beneficial effects of adopting the above technical solution are as follows: The setting of the limit shoulder starts from the structure of the toggle tie rod itself, and realizes the movement limit of the toggle tie rod by adjusting the cooperation between the end structure of the toggle tie rod and the guide seat. The limit is stable and reliable, and no new limit element needs to be added, thereby effectively reducing the manufacturing cost of the self-locking pressurizing mechanism.

[0026] As a further improvement of the technical solution of the present invention, the self-locking pressurizing mechanism further includes a tensile strain gauge, and the tensile strain gauge is arranged on the toggle tie rod to sense the tensile force received by the toggle tie rod.

[0027] The beneficial effects of adopting the above technical solution are as follows: The setting of the tensile strain gauge is convenient for detecting the tensile force borne by the crossbeam toggle tie rod, so as to indirectly obtain the pressurizing pressure applied to the tire mold, and provide a control basis for controlling the action of the driving unit of the clamping device.

[0028] As a further improvement of the technical solution of the present invention, the self-locking pressurizing mechanism further includes a control unit and an alarm. The control unit is communicatively connected to the driving unit, the tensile strain gauge and the alarm by wire or wirelessly. The alarm is used to receive the abnormal situation alarm instruction from the control unit and give an alarm.

[0029] The beneficial effects of adopting the above technical solution are as follows: With the control unit and the alarm set, the control unit receives the real-time pressure information from the tensile strain gauge. When the tensile force borne by the toggle tie rod reaches the predetermined pressure value, the control unit issues an instruction to the drive unit to stop driving or release the lock. After receiving the instruction, the drive unit performs the corresponding action, thus realizing the automatic control of the self-locking pressurizing mechanism. When the signal feedback of the tensile strain gauge is abnormal or the drive unit malfunctions, the control unit sends an abnormal alarm instruction to the alarm. After receiving the alarm instruction, the alarm sounds an alarm to remind the surrounding personnel to handle the abnormal situation in time to avoid more serious losses.

[0030] On the other hand, the present invention further discloses a tire vulcanizer, including the self-locking pressurizing mechanism described in any one of the above technical solutions.

[0031] The beneficial effects of adopting the above technical solution are as follows: Any tire vulcanizer incorporating the self-locking pressurizing mechanism described in any one of the above technical solutions can completely overcome the situation where the mold opens due to oil leakage in the oil cylinder, valve, and pipeline, thus avoiding the occurrence of tire flash or even bladder explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic configuration diagram of the self-locking pressurizing mechanism of the present invention;

[0034] Figure 2 It is a partial schematic diagram of the toggle tie rod of the present invention;

[0035] Figure 3 It is Figure 1 A partially enlarged schematic diagram of the mold locking device of a structure at I in

[0036] Figure 4 It is Figure 3 A schematic diagram of the lubrication structure in the A-A direction in

[0037] Figure 5 It is a schematic configuration diagram of another self-locking pressurizing mechanism of the present invention;

[0038] The corresponding component names represented by the numbers in the figure are as follows:

[0039] Tire mold 01; lubricant 02; base 1; crossbeam 2; mold clamping tie rod 3; inclined plane through hole 31; hole inclined plane 311; mold clamping device 4; inserting rod 41; locking straight face section 411; driving inclined plane section 412; rod inclined plane 4121; lubrication structure 413; lubricant supply chamber 4131; supply channel 4132; oil storage tank 4133; outflow hole 4134; guide seat 42; mold clamping tie rod through hole 421; inserting rod through hole 422; driving unit 43; tensile strain gauge 5; control unit 6; alarm 7. Detailed implementation mode

[0040] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively and meticulously in conjunction with the accompanying drawings of the specification and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0041] To achieve the object of the present invention, the technical solution provided by the present invention is as follows:

[0042] In some embodiments of the present invention, as Figure 1 , shown in FIG. 2, a self-locking pressurizing mechanism is disclosed, which is used to pressurize the tire mold in a tire vulcanizer. The self-locking pressurizing mechanism includes a base 1 and a crossbeam 2. A tire mold 01 is clamped between the base 1 and the crossbeam 2. The self-locking pressurizing mechanism further includes: a mold clamping tie rod 3 and a mold clamping device 4;

[0043] The mold clamping tie rod 3 is used to connect the base 1 and the crossbeam 2; an inclined plane through hole 31 is provided on the mold clamping tie rod 3. The inclined plane through hole 31 at least includes one hole inclined plane 311; along the axial direction of the inclined plane through hole 31, the distances between any two points on the hole inclined plane 311 and the base 1 are not the same or the distances between any two points on the hole inclined plane 311 and the crossbeam 2 are not the same;

[0044] The mold clamping device 4 is correspondingly arranged with the inclined plane through hole 31. The mold clamping device 4 includes an inserting rod 41. The inserting rod 41 is used to enter and exit the inclined plane through hole 31 to lock or unlock the base 1 and the crossbeam 2.

[0045] The beneficial effects of adopting the above technical solution are as follows: fully considering the problems existing in the way of directly tensioning and pressurizing the mechanism by hydraulic pressure in the prior art, such as the inability to completely overcome the mold opening caused by oil leakage, the generation of flash on the tire, and even the explosion of the bladder. An inclined plane through hole is provided on the mold clamping tie rod, and an inserting rod is provided in the mold clamping device. By the inserting rod entering and exiting the inclined plane through hole, not only can the mold clamping tie rod be driven to tighten the base and the crossbeam, so as to pressurize the tire mold, but also the pressurizing mechanism can be self-locked through its own structural characteristics, and there is no need to maintain it through hydraulic pressure. Therefore, once the self-locking pressurizing mechanism is completely self-locked, the tire mold after mold clamping will never open, thus eliminating the need to worry about the serious consequences brought by hydraulic oil leakage.

[0046] In some other embodiments of the present invention, as Figure 1 shown, at least one end of the mold clamping pull rod 3 passes through the base 1 and can reciprocate telescopically; the inclined plane through hole 31 is provided at the end of the mold clamping pull rod 3 passing through the base 1, and the inclined plane through hole 31 is located on the bottom surface side of the base 1 facing away from the tire mold 01.

[0047] The beneficial effects of adopting the above technical solution are as follows: the inclined plane through hole is arranged at one end of the mold clamping pull rod close to the bottom of the base. On the one hand, it is convenient to configure the mold clamping device. On the other hand, it avoids the influence of the tire mold on the mold clamping device during the mold clamping or unlocking process of the mold, and promotes the durability of the mold clamping device.

[0048] In some other embodiments of the present invention, as Figures 3 - 5 shown, the mold clamping device 4 further includes a guide seat 42 and a driving unit 43. The guide seat 42 is provided with a mold clamping pull rod through hole 421 and a plug rod through hole 422. The guide seat 42 is sleeved around the mold clamping pull rod 3 through the mold clamping pull rod through hole 421 and fixedly connected to the bottom surface of the base 1. One end of the plug rod 41 is aligned with the plug rod through hole 422, and the other end of the plug rod 41 is connected to the driving unit 43. The driving unit 43 is fixedly connected to the base 1 to provide a driving force for the telescopic movement of the plug rod 41.

[0049] The beneficial effects of adopting the above technical solution are as follows: the setting of the guide seat, firstly, provides a reaction force and support for the plug rod to drive the mold clamping pull rod to move axially during the telescopic process; more importantly, the mold clamping pull rod through hole provides a directional guide for the axial movement of the mold clamping pull rod, which can effectively prevent the mold clamping pull rod from deviating from the direction during the force - applied movement, thereby causing a large mold clamping error of the tire mold and affecting the quality of the tire finished product.

[0050] In some other embodiments of the present invention, as Figures 3 - 4 shown, the plug rod 41 includes a locking straight - face section 411 and a driving inclined - face section 412. One end of the locking straight - face section 411 is connected to the driving unit 43, the other end of the locking straight - face section 411 is fixedly connected to the driving inclined - face section 412, and the driving inclined - face section 412 is provided with a rod inclined - face 4121 matching the hole inclined - face 311.

[0051] The beneficial effects of adopting the above technical solution are as follows: the combined setting of the locking straight - face section and the driving inclined - face section can gradually realize the driving and locking of the mold clamping pull rod according to the inserted position during the telescopic process of the plug rod. The structure configuration is simple. On the premise of realizing the dual functions of driving and locking, the configuration cost of the self - locking type pressurizing mechanism is greatly reduced, and the market competitiveness of the equipment is improved.

[0052] In some other embodiments of the present invention, as Figure 3, as shown in Fig. 4, a lubrication structure 413 is provided on the rod inclined surface 4121 of the driving inclined surface 412. The lubrication structure 413 is used to store the lubricant 02 and transport it to the rod inclined surface 4121.

[0053] The beneficial effects of adopting the above technical solution are as follows: The setting of the lubrication structure facilitates the provision of lubricant between the hole inclined surface and the rod inclined surface that rub against each other, can significantly reduce the surface friction force between the plug rod and the toggle tie bar, and thus effectively reduces the driving force required for the plug rod to enter and exit the inclined surface through hole without affecting the driving and locking functions of the plug rod on the toggle tie bar. Therefore, a driving unit with a smaller power can be selected, reducing energy consumption.

[0054] In some other embodiments of the present invention, such as Figure 3 , as shown in Fig. 4, the lubrication structure 413 includes a lubricant supply chamber 4131, a supply channel 4132, an oil storage tank 4133, and an outflow hole 4134. The lubricant supply chamber 4131 is opened above the driving inclined surface section 412. There are multiple oil storage tanks 4133, and the multiple oil storage tanks 4133 are opened in the rod inclined surface 4121 along the direction perpendicular to the axis of the plug rod 41. Each oil storage tank 4133 is communicated with the lubricant supply chamber 4131 through at least one supply channel 4132, and each oil storage tank 4133 is communicated with multiple outflow holes 4134. The outlet of the outflow hole 4134 is arranged on the rod inclined surface 4121.

[0055] The beneficial effects of adopting the above technical solution are as follows: The lubricant supply chamber can store a certain amount of lubricant and transport it to the oil storage tank near the rod inclined surface through the supply channel. Multiple outflow holes are arranged between the oil storage tank and the rod inclined surface. To improve the uniformity of lubrication, the outflow holes are evenly arranged. Since the aperture of the outflow hole is very small, under normal conditions, the lubricant forms micro lubricant drops at the outlet of the outflow hole. During the process of the plug rod inserting into the inclined surface through hole to drive the toggle tie bar to move, the lubricant drops form a uniform lubricating layer between the rod inclined surface and the hole inclined surface that rub against each other to reduce the surface friction force between the plug rod and the toggle tie bar. The setting of the lubricant supply chamber can meet the stable supply of lubricant within a certain relatively long period, effectively extend the lubricant replenishment cycle, and reduce the number of shutdowns.

[0056] In some other embodiments of the present invention, such as Figures 3 - 4 As shown, a limit shoulder 32 is provided on the toggle tie bar 3 near the inclined surface through hole 31. The limit shoulder 32 is used to limit the telescopic distance of the toggle tie bar 3 relative to the guide seat 42.

[0057] The beneficial effects of adopting the above technical solution are as follows: The setting of the limit shoulder starts from the structure of the toggle tie bar itself. By adjusting the structure at the end of the toggle tie bar to cooperate with the guide seat, the movement limit of the toggle tie bar is realized. The limit is stable and reliable, and no new limit element needs to be added, thus effectively reducing the manufacturing cost of the self-locking pressurizing mechanism.

[0058] In some other embodiments of the present invention, as Figure 5 shown, the self-locking pressurizing mechanism further includes a tensile strain gauge 5, which is arranged on the clamping die tie rod 3 to sense the tensile force received by the clamping die tie rod 3.

[0059] The beneficial effect of adopting the above technical solution is that the setting of the tensile strain gauge facilitates detecting the tensile force borne by the crossbeam clamping die tie rod, thereby indirectly obtaining the pressurizing pressure applied to the tire mold, and providing a control basis for controlling the action of the driving unit of the clamping device.

[0060] In some other embodiments of the present invention, as Figure 5 shown, the self-locking pressurizing mechanism further includes a control unit 6 and an alarm 7. The control unit 6 is communicatively connected to the driving unit 43, the tensile strain gauge 5, and the alarm 7 through wire or wirelessly. The alarm 7 is used to receive the abnormal situation alarm instruction from the control unit 6 and give an alarm.

[0061] The beneficial effect of adopting the above technical solution is that due to the setting of the control unit and the alarm, the control unit receives the real-time pressure information of the tensile strain gauge. When the tensile force borne by the clamping die tie rod reaches the predetermined pressure value, the control unit issues an instruction to the driving unit to stop driving or release the locking accordingly. After receiving the instruction, the driving unit performs the corresponding action, thereby realizing the automatic control of the self-locking pressurizing mechanism. When the signal feedback of the tensile strain gauge is abnormal, or the driving unit acts abnormally, the control unit sends an abnormal alarm instruction to the alarm. After receiving the alarm instruction, the alarm gives an alarm to remind the surrounding personnel to handle the abnormal situation in time to avoid more serious losses.

[0062] In some other embodiments of the present invention, the present invention further discloses a tire vulcanizer, which includes the self-locking pressurizing mechanism in any one of the above technical solutions.

[0063] The beneficial effect of adopting the above technical solution is that the tire vulcanizer including the self-locking pressurizing mechanism in any one of the above technical solutions can completely overcome the situation that the mold opens due to oil leakage in the oil cylinder, valve, and pipeline, thereby avoiding the occurrence of tire flash or even bladder explosion.

[0064] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it. However, the protection scope of the present invention cannot be limited thereby. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A self-locking pressurizing mechanism used to pressurize a tire mold in a tire vulcanizer. The self-locking pressurizing mechanism includes a base and a crossbeam, and a tire mold is clamped between the base and the crossbeam. It is characterized in that, The self-locking pressurizing mechanism further includes: a toggle tie bar and a clamping device; The toggle tie bar is used to connect the base and the crossbeam; the toggle tie bar is provided with an inclined through hole, and the inclined through hole at least includes one hole inclined surface; along the axial direction of the inclined through hole, the distances between any two points on the hole inclined surface and the base are not the same or the distances between any two points on the hole inclined surface and the crossbeam are not the same; The clamping device is correspondingly arranged with the inclined through hole, and the clamping device includes a plug rod, and the plug rod is used to enter and exit the inclined through hole to lock or unlock the base and the crossbeam; wherein, The clamping device further includes a guide seat and a driving unit, the guide seat is provided with a toggle tie bar through hole and a plug rod through hole, the guide seat is sleeved around the toggle tie bar and fixedly connected to the bottom surface of the base, one end of the plug rod is aligned with the plug rod through hole, the other end of the plug rod is connected to the driving unit, and the driving unit is fixedly connected to the base to provide driving force for the telescopic movement of the plug rod; The plug rod includes a locking straight surface section and a driving inclined surface section, one end of the locking straight surface section is connected to the driving unit, the other end of the locking straight surface section is fixedly connected to the driving inclined surface section, and the driving inclined surface section is provided with a rod inclined surface matching the hole inclined surface; A lubricating structure is arranged on the rod inclined surface of the driving inclined surface section, and the lubricating structure is used to store lubricant and convey it to the rod inclined surface; and A limiting shoulder is arranged on the toggle tie bar near the inclined through hole, and the limiting shoulder is used to limit the telescopic distance of the toggle tie bar relative to the guide seat.

2. The self-locking pressurizing mechanism according to claim 1, wherein , At least one end of the two ends of the toggle tie bar passes through the base and can reciprocally telescopic; the inclined through hole is arranged at the end of the toggle tie bar passing through the base, and the inclined through hole is located on the bottom surface side of the base facing away from the tire mold.

3. The self-locking pressurizing mechanism according to claim 1, wherein , The lubricating structure includes a lubricant supply chamber, a supply channel, an oil storage groove and an outflow hole, the lubricant supply chamber is opened above the driving inclined surface section, there are multiple oil storage grooves, the multiple oil storage grooves are opened in the rod inclined surface along the direction perpendicular to the axis of the plug rod, each oil storage groove is communicated with the lubricant supply chamber through at least one supply channel, each oil storage groove is communicated with multiple outflow holes, and the outlet of the outflow hole is arranged on the rod inclined surface.

4. The self-locking pressurizing mechanism according to claim 1, characterized in that , Further includes a tensile strain gauge, and the tensile strain gauge is arranged on the toggle tie bar to sense the tensile force received by the toggle tie bar.

5. The self-locking pressurizing mechanism according to claim 4, wherein , Further includes a control unit and an alarm, the control unit is communicatively connected with the driving unit, the tensile strain gauge and the alarm through wire or wirelessly, and the alarm is used to receive the abnormal situation alarm instruction from the control unit and give an alarm.

6. A tire vulcanizer, characterized in that, Includes the self-locking pressurizing mechanism according to any one of claims 1-5.

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