A vulcanization equipment locking mold hydraulic cylinder

Abstract

The application discloses a vulcanization equipment locking mold hydraulic cylinder, which comprises a cylinder barrel, upper and lower end covers, a piston seat, a piston rod and a plunger rod. The piston seat is slidably arranged in the cylinder barrel and is divided into upper and lower chambers. The piston rod is connected with the piston seat and penetrates through the upper end cover. The plunger rod is fixed to the lower end cover and is inserted into a guide through cavity in the piston rod. The guide through cavity is provided with upper and lower buffer grooves, the bottom thereof is sealingly attached to the plunger rod, and the plunger rod is internally provided with an oil delivery passage which is in communication with the guide through cavity. The hydraulic cylinder is provided with three oil inlet and outlet passages A, B and C which are respectively in communication with the upper chamber, the oil delivery passage and the lower chamber, and is provided with an oil adjusting assembly for the coordinated control of the three oil passages, so that the transmission state of the hydraulic oil can be accurately controlled. The structure optimizes the hydraulic oil control mode, realizes the integrated operation of fast mold closing, pressure locking and mold opening and demolding, effectively improves the action synchronization of the equipment, and guarantees the stability of the high-pressure locking stage, the synchronization and stability of the equipment and the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic cylinders, in particular to a vulcanization equipment locking mold hydraulic cylinder. BACKGROUND

[0002] The vulcanization equipment locking mold hydraulic cylinder is an indispensable key equipment in the production process of rubber products, mainly used for fast mold closing, pressurizing and locking, and mold opening and demolding operations. Traditional vulcanization equipment usually uses multiple small oil cylinders to achieve fast mold closing, and then uses a main oil cylinder to lock the mold. Although this scheme can meet the production requirements to some extent, it also has many problems. First, the cooperation of multiple oil cylinders is easy to be out of sync, causing damage to the guide column copper sleeve and affecting the stability and service life of the equipment. Second, the design of multiple oil cylinders increases the complexity and manufacturing cost of the equipment, and maintenance and repair are more difficult. In addition, the flow control of hydraulic oil in the traditional hydraulic cylinder is not precise enough during fast mold closing and locking, which can easily cause unstable mold closing speed and affect product quality.

[0003] In order to solve the above problems, in recent years, the industry has begun to explore the use of a single hydraulic cylinder to achieve the integration of fast mold closing, pressurizing and locking, and mold opening and demolding. This scheme not only simplifies the equipment structure and reduces the manufacturing cost, but also improves the synchronization and stability of the equipment. However, the existing single hydraulic cylinder design still has deficiencies in hydraulic oil control and buffering effect, especially during fast mold closing and locking, the flow speed and pressure control of hydraulic oil are not precise enough, which can easily cause unstable mold closing speed and affect product quality. SUMMARY

[0004] In view of the above deficiencies in the prior art, the present application aims to provide a vulcanization equipment locking mold hydraulic cylinder, which realizes the integration of fast mold closing, pressurizing and locking, and mold opening and demolding by optimizing the structure design of the hydraulic cylinder and the control method of the hydraulic oil, significantly improves the synchronization, stability and service life of the equipment, and has wide application prospect and market value.

[0005] The technical scheme adopted by the present application to achieve the above-mentioned purpose is: a vulcanization equipment locking mold hydraulic cylinder, comprising a cylinder barrel, an upper end cover, a lower end cover, a piston seat, and a piston rod, the upper end cover and the lower end cover are sealed and assembled at the upper and lower ends of the cylinder barrel, the piston seat is slidingly installed in the cylinder barrel and divides the cylinder barrel into an upper chamber and a lower chamber, and the piston rod is fixedly connected to the top of the piston seat and slidingly inserted into the axis of the upper end cover.

[0006] Further comprising a plunger rod fixedly installed at the axis of the lower end cover and arranged in a vertical direction, a guide through cavity in sliding connection with the plunger rod is formed at the axis of the plunger rod, an upper buffer groove and a lower buffer groove are respectively formed at the top and bottom of the guide through cavity, the inner diameters of the upper buffer groove and the lower buffer groove are larger than the inner diameter of the guide through cavity, the guide through cavity is in sealing connection with the plunger rod at the bottom port, and an oil delivery channel is formed at the axis of the plunger rod, and the top end of the oil delivery channel is in communication with the guide through cavity.

[0007] An oil inlet and outlet passage A is formed on the upper end cover and is in communication with the upper chamber, an oil inlet and outlet passage B and an oil inlet and outlet passage C are formed on the lower end cover, the oil inlet and outlet passage B is in communication with the oil delivery channel, and the oil inlet and outlet passage C is in communication with the lower chamber.

[0008] Further comprising an oil adjusting assembly, which is connected with the oil inlet and outlet passage A, the oil inlet and outlet passage B and the oil inlet and outlet passage C and is used for adjusting the transmission state of the hydraulic oil.

[0009] On the basis of the above technical scheme, in order to facilitate the machining of the plunger rod and ensure that the lower mold of the locking mold can be stably assembled at the end of the plunger rod, the lifting posture of the plunger rod and the plunger seat is controlled to synchronously control the lower mold, and the following technical scheme is provided.

[0010] A mounting groove A is formed at the top end axis of the plunger rod, the top end of the guide through cavity is in communication with the mounting groove A, a tray arranged above the upper end cover is fixedly installed in the mounting groove A, the tray is in sealing connection with the top end of the guide through cavity, and the tray is used for fixedly installing the lower mold of the locking mold.

[0011] On the basis of the above technical scheme, in order to facilitate the machining of the plunger rod and ensure that the lower mold of the locking mold can be stably assembled at the end of the plunger rod, the lifting posture of the plunger rod and the plunger seat is controlled to synchronously control the lower mold, and the following technical scheme is provided.

[0012] A mounting groove B is formed at the top axis of the lower end cover, the bottom end of the plunger rod is fixedly installed in the mounting groove B, and the plunger seat is in nested combination with the plunger rod when the plunger seat is at the bottom end of the stroke.

[0013] On the basis of the above technical scheme, in order to further realize the buffering effect of the relative movement of the plunger rod and the plunger rod, the following technical scheme is provided.

[0014] The shaft center of the tray is fixedly installed with a speed regulating valve rod arranged in the oil conveying passage, the speed regulating valve rod is in a rod-shaped structure with thick ends and a thin middle part, the top end of the plunger rod is fixedly installed with a speed regulating valve sleeve arranged at the periphery of the speed regulating valve rod, and the speed regulating valve rod and the inner wall of the speed regulating valve sleeve are provided with a gap.

[0015] On the basis of the above technical scheme, in order to ensure that the oil liquid regulating assembly can accurately regulate the state of the hydraulic oil in and out of the oil passage and realize the control of the operating posture of the hydraulic cylinder, the following technical scheme is provided:

[0016] The oil liquid regulating assembly comprises an assembly seat, a regulating motor, a regulating sleeve, a valve housing, a valve core and a guide rod, the regulating sleeve is rotationally installed on the assembly seat, the regulating motor is fixedly installed on the assembly seat and is in power connection with the regulating sleeve, the inner wall of the regulating sleeve is provided with three groups of cam grooves arranged at different height positions, each group of the cam grooves is matched with a group of guide rods, the valve housing is fixedly installed on the assembly seat and is arranged below the regulating sleeve, three groups of sliding through grooves are formed in the valve housing, the in and out oil passage A, the in and out oil passage B and the in and out oil passage C are in communication with a group of sliding through grooves respectively, and each group of the sliding through grooves is assembled with a group of the valve cores, and the valve core is fixedly connected with the guide rod at the corresponding position.

[0017] On the basis of the above technical scheme, in order to ensure the stability of the stable operation of the regulating motor driving the regulating sleeve, so as to ensure the stable oil feeding and discharging operation to the corresponding chamber of the hydraulic cylinder, the following technical scheme is provided:

[0018] The top end of the regulating sleeve is fixedly assembled with a connecting cover, the shaft center of the connecting cover is fixedly connected with a worm gear, the output shaft of the regulating motor is coaxially fixedly connected with a worm, and the worm is rotationally installed on the assembly seat and is in matched combination with the worm gear.

[0019] On the basis of the above technical scheme, in order to ensure that the cam groove can adjust the height of the corresponding matched guide rod during operation, and realize the posture matching with the locking die, the following technical scheme is provided:

[0020] Each group of the cam grooves comprises an upper guide groove, a middle guide groove and a lower guide groove arranged at different height positions, and the upper guide groove, the middle guide groove and the lower guide groove are spliced to form a closed loop through the inclined guide grooves.

[0021] On the basis of the above technical scheme, the valve core can correspond to three kinds of transmission states at the high, middle and low positions of the guide rod respectively, and the following technical scheme is provided:

[0022] The sliding grooves are connected with transversely arranged assembly interfaces A, B and C, the assembly interfaces B and C are arranged reversely to the assembly interface A, and the assembly interfaces B and C are arranged on the two sides of the assembly interface A respectively.

[0023] The valve core is provided with an oil supply groove arranged along the axial direction and in communication with the assembly interfaces, and the middle section of the valve core is provided with a radial interface in communication with the oil supply groove.

[0024] On the basis of the above technical scheme, in order to ensure that the assembly interface B can realize the oil inlet of the hydraulic oil in the hydraulic system to the inlet and outlet oil way, and ensure that the assembly interface C can realize the oil discharge of the inlet and outlet oil way to the hydraulic system, the following technical scheme is provided.

[0025] The assembly interfaces B and C are respectively provided with a first one-way valve and a second one-way valve, and the first one-way valve and the second one-way valve are arranged reversely.

[0026] The beneficial effects of the present application are as follows:

[0027] 1. Integrated operation, improve equipment synchronism: the present scheme realizes fast clamping, pressurized clamping and mold opening and demolding through a single hydraulic cylinder, avoids the damage of guide column copper sleeve caused by different synchronization of oil cylinders in traditional multi-oil cylinder scheme, and significantly improves the synchronism and stability of the equipment.

[0028] 2. Enhance the buffering effect, prolong the service life of the equipment: by setting the upper and lower buffer grooves at the top and bottom of the guide cavity and the cooperation of the speed regulating valve rod and the speed regulating valve sleeve, the relative movement speed of the piston rod and the plunger rod can be effectively slowed down, and the collision in the process of rapid movement can be avoided, prolonging the service life of the equipment.

[0029] 3. Simplify the processing technology and reduce the manufacturing cost: the present scheme optimizes the structure design of the piston rod and the plunger rod, simplifies the processing technology and reduces the manufacturing cost. Especially by setting the assembly sink and the tray, the processing and assembly process of the piston rod is simplified, and the production efficiency is improved.

[0030] 4. Precise control of hydraulic oil transmission state, improve equipment running stability: by setting the oil adjusting assembly, the oil inlet, oil discharge and closing state of the hydraulic oil can be precisely controlled, ensuring the stable operation of the hydraulic cylinder in different operation processes, and improving the overall performance of the equipment.

[0031] In summary, the present scheme realizes the integrated operation of fast clamping, pressurizing, locking and opening by optimizing the structure design of the hydraulic cylinder and the control mode of the hydraulic oil, significantly improves the synchronism, stability and service life of the equipment, and has wide application prospect and market value. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is an appearance structure schematic diagram of the hydraulic cylinder of the present application;

[0033] Figure 2 It is an internal structure schematic diagram of the hydraulic cylinder;

[0034] Figure 3 It is Figure 2 It is a structure schematic diagram of the hydraulic cylinder during the extension and retraction process;

[0035] Figure 4 It is a detail schematic diagram of the piston rod, the lower end cover, the plunger rod, the speed regulating valve rod and the speed regulating valve sleeve matched combination;

[0036] Figure 5 It is a structure schematic diagram of the piston rod and the matched combination of the installation components thereon;

[0037] Figure 6 It is a structure schematic diagram of the oil adjusting assembly;

[0038] Figure 7 It is a structure schematic diagram of the adjusting sleeve and the guide rod matched combination;

[0039] Figure 8 It is a trajectory diagram of each group of cam grooves;

[0040] Figure 9 It is an internal structure schematic diagram of the valve shell;

[0041] Figure 10 It is a cross-sectional schematic diagram of the valve core.

[0042] In the figure: 11 cylinder, 111 upper chamber, 112 lower chamber, 12 upper end cover, 121 inlet and outlet oil way A, 13 lower end cover, 131 inlet and outlet oil way B, 132 inlet and outlet oil way C, 133 sealing plug, 134 communication interface, 135 annular sink, 136 assembly sink B, 14 piston seat, 15 piston rod, 151 guide through cavity, 1511 upper buffer groove, 1512 lower buffer groove, 152 assembly sink A, 16 plunger rod, 161 oil delivery passage, 17 tray, 181 speed regulating valve rod, 182 speed regulating valve sleeve, 21 assembly seat, 22 adjusting motor, 221 worm, 23 adjusting sleeve, 231 cam groove, 2311 upper layer guide groove, 2312 middle layer guide groove, 2313 lower layer guide groove, 3214 oblique guide groove, 232 connecting cover, 233 worm wheel, 24 valve housing, 241 sliding through groove, 242 connecting piece, 243 assembly interface A, 244 assembly interface B, 245 assembly interface C, 25 valve core, 251 oil supply through groove, 252 butt joint, 26 guide rod, 271 first one-way valve, 272 second one-way valve. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] Embodiment 1

[0045] Please refer to Figures 1-6 A vulcanizing equipment locking mold hydraulic cylinder comprises a cylinder 11, an upper end cover 12, a lower end cover 13, a piston seat 14 and a piston rod 15. The upper end cover 12 and the lower end cover 13 are sealingly assembled at the upper and lower ends of the cylinder 11. The piston seat 14 is slidingly installed in the cylinder 11 and divides the cylinder 11 into an upper chamber 111 and a lower chamber 112. The piston rod 15 is fixedly connected to the top of the piston seat 14 and slidingly inserted into the axial center of the upper end cover 12.

[0046] The matched combination of the upper end cover 12, the lower end cover 13 and the cylinder 11 can form a sealed through cavity, thereby ensuring the stable sliding of the piston seat 14 and the piston rod 15 therein. By controlling the input and output of hydraulic oil in the upper chamber 111 and the lower chamber 112, the lifting posture of the piston seat 14 and the piston rod 15 can be accurately controlled by the force provided by the hydraulic oil.

[0047] The plunger rod 16 is fixedly installed at the axis of the lower end cover 13 and arranged in the vertical direction, the axis of the piston rod 15 is provided with a guide through cavity 151 which is slidably inserted with the plunger rod 16, the top and bottom of the guide through cavity 151 are respectively provided with an upper buffer groove 1511 and a lower buffer groove 1512, the inner diameters of the upper buffer groove 1511 and the lower buffer groove 1512 are larger than the inner diameter of the guide through cavity 151, the bottom port of the guide through cavity 151 is in sealing and close-fitting with the plunger rod 16, and the axis of the plunger rod 16 is provided with an oil delivery channel 161, the top end of the oil delivery channel 161 is in communication with the guide through cavity 151.

[0048] The upper end cover 12 is provided with an oil inlet and outlet passage A121 which is in communication with the upper chamber 111, and the lower end cover 13 is provided with an oil inlet and outlet passage B131 and an oil inlet and outlet passage C132, the oil inlet and outlet passage B131 is in communication with the oil delivery channel 161, and the oil inlet and outlet passage C132 is in communication with the lower chamber 112.

[0049] The oil regulating assembly is connected with the oil inlet and outlet passage A121, the oil inlet and outlet passage B131 and the oil inlet and outlet passage C132 in a matched mode and used for regulating the transmission state of the hydraulic oil.

[0050] The oil inlet and outlet passage A121, the oil inlet and outlet passage B131 and the oil inlet and outlet passage C132 all include three transmission states of oil inlet, oil outlet and closing, and the overall control is realized by the oil regulating assembly, so that the rapid mold closing, pressurized mold closing and mold opening operation procedures of the hydraulic cylinder in the vulcanization equipment mold closing mode application are realized.

[0051] When the rapid mold closing is performed, the piston seat 14 and the piston rod 15 are located at the bottom end of the cylinder barrel 11, the hydraulic oil is injected into the oil inlet and outlet passage B131, the oil inlet and outlet passage A121 is controlled to be in the oil outlet state, and the oil inlet and outlet passage C132 is controlled to be in the closing state, at this time, the hydraulic oil is injected into the top of the guide through cavity 151 through the oil inlet and outlet passage B131 and the oil delivery channel 161 under the pressure of the oil pump, in the process of continuous injection of the hydraulic oil, the piston rod 15 and the piston seat 14 are lifted upward together, and because the inner diameter of the guide through cavity 151 is small, the injected hydraulic oil can quickly fill the guide through cavity 151, so that the piston rod 15 and the piston seat 14 are quickly lifted. In this process, the hydraulic oil stored in the upper chamber 111 can be freely discharged through the oil inlet and outlet passage A121 under the action of pressure, and because the oil inlet and outlet passage C132 is in the closing state, at this time, the volume of the lower chamber 112 is increased due to the change of the piston seat 14, and thus is in a vacuum or low pressure state.

[0052] Due to the upper and lower ends of the guide through cavity 151 are provided with upper buffer groove 1511, lower buffer groove 1512, the inner diameter of which is larger than the design of the guide through cavity 151. When the hydraulic oil fills this part of the area, due to the increase of its cross-sectional area, the liquid level of the hydraulic oil changes slowly, so as to slow down the relative movement speed of the piston rod 15 and the plunger rod 16, and provide a certain buffer to avoid the collision of the piston rod 15 and the plunger rod 16 in the process of rapid movement.

[0053] In the subsequent pressurized locking process, the control of the inlet and outlet oil way A121, the inlet and outlet oil way B131 is in the closed state, and the inlet and outlet oil way C132 is in the oil inlet state. At this time, the hydraulic oil is filled into the lower chamber 112 through the inlet and outlet oil way C132 under the pressure difference formed by the pressurization of the oil pump and the vacuum or low pressure state of the lower chamber 112, and then the hydraulic oil exerts a stable force on the lower surface of the piston seat 14, so as to realize the stable locking of the locking mold of the vulcanization equipment, and the product production is carried out by filling the melted rubber into the mold.

[0054] When the rubber in the mold is shaped, the mold is opened and the product is demolded. At this time, the control of the inlet and outlet oil way A121 is in the oil inlet state, and the inlet and outlet oil way B131, the inlet and outlet oil way C132 are in the oil discharge state. The hydraulic oil is delivered to the upper chamber 111 through the inlet and outlet oil way A121 under the pressurization of the oil pump, and pushes the piston seat 14 and the piston rod 15 to move downward, realizing the opening of the upper and lower molds. At the same time, the hydraulic oil stored in the lower chamber 112 and the guide through cavity 151 can be discharged through the inlet and outlet oil way C132 and the inlet and outlet oil way B131 respectively under the action of pressure.

[0055] The existing vulcanization equipment usually realizes rapid mold closing through 2-4 small oil cylinders, and realizes mold locking through the main oil cylinder. This scheme not only has high cost, but also is easy to cause different step of each oil cylinder, resulting in damage of the guide column copper sleeve. The technical scheme provided by the present scheme realizes a series of operations of rapid mold closing, pressurized locking and mold opening and demolding of the mold through a single hydraulic cylinder. The mold closing stage does not appear out of synchronization, realizes the integration of mold locking and mold closing, and ensures the integration of work and pressurization.

[0056] Example 2

[0057] Please refer to Figures 2-5 In order to facilitate the machining of the piston rod 15 and ensure that the lower mold of the locking mold can be stably assembled at the end of the piston rod 15, the lifting posture of the piston rod 15 and the piston seat 14 is controlled to synchronously control the lower mold. For this purpose, the following technical scheme is provided:

[0058] The top end of the piston rod 15 is provided with an assembly groove A152, the top end of the guide through cavity 151 is in communication with the assembly groove A152, and the assembly groove A152 is fixedly installed with a tray 17 arranged above the upper end cover 12, the tray 17 is in sealing and close-fitting with the top end of the guide through cavity 151, and the tray 17 is used for fixedly installing the lower mold of the locking mold.

[0059] The guide through cavity 151 and the assembly groove A152 are arranged through the axis of the hydraulic rod, can be machined by a boring cutter, simplify the machining process of the piston rod 15, and the assembly groove is in sealing and close-fitting with the bottom end of the tray 17 and is fixedly combined by a bolt assembly, so that the lower mold of the locking mold can be stably assembled above the tray 17 and synchronously operated in the lifting movement of the piston seat 14 and the piston rod 15.

[0060] In order to facilitate the machining of the plunger rod 16 and stably assemble the plunger rod 16 at the axis of the lower end cover 13 and realize stable oil supply to the guide through cavity 151, the following technical scheme is provided:

[0061] The lower end cover 13 is provided with an assembly groove B136 at the top axis, the plunger rod 16 is fixedly installed in the assembly groove B136, and the piston seat 14 is in nested combination with the plunger rod 16 when the piston seat 14 is at the bottom end of the stroke.

[0062] The bottom end of the plunger rod 16 can be fixedly installed on the lower end cover 13 by a bolt assembly, the piston rod 15 is also installed on the piston seat 14 in a bolted manner, and the piston rod 15 extends to the lower surface of the piston seat 14 and directly slides with the plunger rod 16.

[0063] The guide assembly is arranged at the close-fitting position of the piston seat 14 and the inner wall of the cylinder 11, the close-fitting position of the upper end cover 12 and the piston rod 15, and the close-fitting position of the plunger rod 16 and the guide through cavity 151, so as to ensure the stable sliding of the components.

[0064] In order to further realize the buffering effect of the relative movement of the piston rod 15 and the plunger rod 16, the following technical scheme is provided:

[0065] The axis of the tray 17 is fixedly installed with a speed regulating valve rod 181 arranged in an oil supply passage 161, the speed regulating valve rod 181 is arranged in a rod-shaped structure with thick ends and a thin middle, the top end of the plunger rod 16 is fixedly installed with a speed regulating valve sleeve 182 arranged around the speed regulating valve rod 181, and the speed regulating valve rod 181 and the inner wall of the oil supply passage 161 and the speed regulating valve sleeve 182 are provided with gaps.

[0066] The speed regulating valve rod 181 is assembled to the shaft center of the tray 17 in a top-to-bottom plug-in manner and is fixed and combined by screwing. During the relative movement of the plunger rod 16 and the piston rod 15, the piston rod 15 drives the synchronous movement of the speed regulating valve rod 181, and then different parts of the speed regulating valve rod 181 cooperate with the speed regulating valve sleeve 182 assembled on the plunger rod 16 to effectively adjust the cross-sectional area of the oil delivery passage 161, thereby controlling the flow rate of the hydraulic oil to adjust the flow rate into the guide cavity 151.

[0067] When at both ends of the stroke, the thicker part of the speed regulating valve rod 181 cooperates with the speed regulating valve sleeve 182, which can reduce the transmission cross-sectional area of the hydraulic oil, thereby reducing the flow into the guide cavity 151 to achieve the purpose of buffering and reducing speed.

[0068] To ensure the machining of each oil inlet and outlet passage on the corresponding parts and ensure the stable transmission of hydraulic oil to the corresponding chamber, the oil inlet and outlet passages A121, B131 and C132 are all L-shaped, which facilitates drilling from the side and end surface of the upper end cover 12 and the lower end cover 13. Two groups of interface ends are machined on the upper surface of the lower end cover 13 and arranged vertically and communicated with the oil inlet and outlet passages B131 and C132, respectively. The drilling on the side wall of the upper end cover 12 is sealed by the sealing plug 133, and the interface end of the oil inlet and outlet passage A121 is arranged on the side wall of the upper end cover 12. The arrangement of each interface end can ensure the sealed connection with the corresponding interface on the oil regulating assembly.

[0069] The upper surface of the lower end cover 13 is also provided with a concentrically arranged communication interface 134 and an annular sink 135. The communication interface 134 is in communication with the oil delivery passage 161 and the oil inlet and outlet passage B131, and the annular sink 135 is arranged outside the communication interface 134 and is in communication with the lower chamber 112 and the oil inlet and outlet passage B131.

[0070] In addition, each part involved above is equipped with a corresponding type of sealing gasket at the position of sealed combination with each other to ensure the sealing effect of the combination and avoid leakage of hydraulic oil through the connecting surface.

[0071] Embodiment 3

[0072] Please refer to Figures 6-7 To ensure that the oil regulating assembly can accurately regulate the state of hydraulic oil entering and leaving each oil inlet and outlet passage and control the running posture of the hydraulic cylinder, the following technical solutions are provided:

[0073] The oil liquid adjusting assembly comprises an assembling base 21, an adjusting motor 22, an adjusting sleeve 23, a valve shell 24, valve cores 25 and guide rods 26, the adjusting sleeve 23 is rotatably installed on the assembling base 21, the adjusting motor 22 is fixedly installed on the assembling base 21 and is in power connection with the adjusting sleeve 23, the inner wall of the adjusting sleeve 23 is provided with three groups of cam grooves 231 arranged at different height positions, each group of the cam grooves 231 is matched with a group of the guide rods 26, the valve shell 24 is fixedly installed on the assembling base 21 and is arranged below the adjusting sleeve 23, three groups of sliding through grooves 241 are formed in the valve shell 24, inlet and outlet oil passages A121, B131 and C132 are in communication with a group of the sliding through grooves 241 respectively, and each group of the sliding through grooves 241 is fitted with a group of the valve cores 25, and the valve core 25 is fixedly connected with the corresponding guide rod 26.

[0074] During the operation of the adjusting motor 22 driving the adjusting sleeve 23, the corresponding lifting movement of each guide rod 26 can be driven through the cooperation of the cam groove 231 and the corresponding guide rod 26, so as to control the position and posture of the valve core 25 in the corresponding sliding through groove 241, so as to realize the adjustment of the oil inlet, oil discharge and closing posture of the corresponding inlet and outlet oil passage.

[0075] The valve shell 24 is provided with a connecting piece 242 to realize the stable installation of the valve shell 24 on the assembling base 21 and realize the stable installation of the valve shell 24 at the bottom of the adjusting sleeve 23, and the guide rod 26 is provided in an L-shaped structure, the horizontal section of which is matched with the corresponding cam groove 231, and the vertical section is fixedly connected with the corresponding valve core 25, during the operation of the adjusting sleeve 23 and the cam groove 231 therein, each group of the guide rods 26 and the valve cores 25 can be driven to make corresponding lifting posture adjustment.

[0076] In order to ensure the stability of the stable operation of the adjusting motor 22 driving the adjusting sleeve 23, so as to ensure the stable oil inlet and oil discharge operation to the corresponding chamber of the hydraulic cylinder, the following technical solutions are provided:

[0077] The top end of the adjusting sleeve 23 is fixedly fitted with a connecting cover 232, the shaft center of the connecting cover 232 is fixedly connected with a worm wheel 233, the output shaft of the adjusting motor 22 is coaxially fixedly connected with a worm 221, the worm 221 is rotatably installed on the assembling base 21 and is matched with the worm wheel 233.

[0078] The connecting cover 232 and the adjusting sleeve 23 are fixedly combined by bolt fixation. When the adjusting motor 22 drives the worm 221 to operate, the worm gear 233, the connecting cover 232 and the adjusting sleeve 23 can be synchronously operated. Since the combination of the worm 221 and the worm gear 233 has the characteristics of speed reduction, torque increase and one-way self-locking, the adjusting sleeve 23 can be stably operated, and the power can be one-way transmitted from the worm 221 to the worm gear 233. When the adjusting motor 22 completes the posture adjustment of the guide rod 26 and the valve core 25 through the adjusting sleeve 23 and stops, the worm gear 233 is in a self-locking state under the action of the worm 221, so as to ensure that the guide rod 26 and the valve core 25 are maintained in a specific position, thereby ensuring that each oil inlet and outlet circuit is maintained in a corresponding transmission state.

[0079] Embodiment 4

[0080] Please refer to Figures 8-10 In order to ensure that the cam groove 231 can adjust the height of the corresponding guide rod 26 during operation and realize the posture adjustment of the locking die, the following technical solutions are provided.

[0081] Each group of cam grooves 231 includes an upper guide groove 2311, a middle guide groove 2312 and a lower guide groove 2313 arranged at different height positions. The upper guide groove 2311, the middle guide groove 2312 and the lower guide groove 2313 are connected by a diagonal guide groove 3214 to form a closed loop.

[0082] The connection between the upper guide groove 2311, the middle guide groove 2312, the lower guide groove 2313 and the diagonal guide groove 3214 is provided with an arc transition section to ensure that the transverse section of the guide rod 26 stably slides in each guide groove.

[0083] When the guide rod 26 moves into the upper guide groove 2311, its height is at the highest state, at this time, the corresponding oil inlet and outlet circuit is in the oil inlet transmission state. When the guide rod 26 moves in the middle guide groove 2312 and the lower guide groove 2313, the transmission state of the corresponding oil inlet and outlet circuit is closed and oil discharge state respectively.

[0084] When the locking die is rapidly closed, the transmission states of the oil inlet and outlet circuits A121, B131 and C132 are oil discharge, oil inlet and closed respectively, so the positions of the three groups of cam grooves 231 cooperating with the corresponding guide rods 26 are the lower guide groove 2313, the upper guide groove 2311 and the middle guide groove 2312.

[0085] When the locking die is pressurized and closed, the transmission states of the oil inlet and outlet circuits A121, B131 and C132 are closed, closed and oil inlet respectively, so the positions of the three groups of cam grooves 231 cooperating with the corresponding guide rods 26 are the middle guide groove 2312, the middle guide groove 2312 and the upper guide groove 2311.

[0086] When the locking mold is opened and demolded, the transmission states of the inlet and outlet oil ways A121, B131 and C132 are oil inlet, oil discharge and oil discharge respectively, and the positions of the three sets of cam grooves 231 cooperating with the corresponding guide rods 26 are the upper guide groove 2311, the lower guide groove 2313 and the lower guide groove 2313.

[0087] The valve core 25 can correspond to three transmission states at the high, middle and low positions of the guide rod 26, and the following technical solutions are provided:

[0088] Each set of sliding grooves 241 is connected with assembly interfaces A243, B244 and C245 arranged transversely, the assembly interfaces B244 and C245 are arranged reversely with the assembly interface A243, the assembly interfaces B244 and C245 are arranged on both sides of the assembly interface A243 respectively, and each set of assembly interfaces A243 is connected with the inlet and outlet oil ways A121, B131 and C132.

[0089] The valve core 25 is provided with an oil supply groove 251 arranged along the axial direction and always connected with the assembly interface, and the middle section of the valve core 25 is provided with a docking interface 252 arranged radially and connected with the oil supply groove 251, and the docking interface 252 can be connected with the assembly interfaces B244 and C245.

[0090] Each of the assembly interfaces B244 and C245 is connected with the hydraulic system, when the valve core 25 moves to the top of the stroke with the guide rod 26, the docking interface 252 on the valve core 25 can be connected with the assembly interface B244, and the hydraulic oil in the hydraulic system can be transmitted to the corresponding inlet and outlet passages through the assembly interface B244, the docking interface 252 and the oil supply groove 251.

[0091] When the valve core 25 is in the middle section of the stroke, the docking interface 252 is blocked by the inner wall of the sliding groove 241, and the assembly interfaces B244 and C245 are blocked by the valve core 25, so that the transmission path of the hydraulic oil is in the disconnected state.

[0092] When the valve core 25 is at the bottom of the stroke, the docking interface 252 on the valve core 25 can be connected with the assembly interface C245, and at this time the hydraulic oil in the corresponding inlet and outlet oil ways can be transmitted to the hydraulic system through the corresponding assembly interface A243, the oil supply groove 251, the docking interface 252 and the assembly interface C245.

[0093] On the basis of the above technical solutions, in order to ensure that the assembly interface B244 can realize the oil inlet of the hydraulic oil in the hydraulic system to the inlet and outlet oil ways, and ensure that the assembly interface C245 can realize the oil discharge of the inlet and outlet oil ways to the hydraulic system, the following technical solutions are provided:

[0094] The assembly interface B 244 and the assembly interface C 245 are respectively assembled with a first one-way valve 271 and a second one-way valve 272, and the first one-way valve 271 and the second one-way valve 272 are arranged in opposite directions.

[0095] The first one-way valve 271 can control the one-way transmission of the hydraulic oil in the assembly interface B 244 to the assembly interface A 243, and the second one-way valve 272 can control the one-way transmission of the hydraulic oil in the assembly interface A 243 to the assembly interface C 245, thereby realizing the control of the transmission direction of the hydraulic oil, and realizing the control of the transmission state of the hydraulic oil.

[0096] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0097] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A vulcanization equipment locking mold hydraulic cylinder, comprising a cylinder barrel (11), an upper end cover (12), a lower end cover (13), a piston seat (14), and a piston rod (15), the upper end cover (12) and the lower end cover (13) being sealingly assembled at the upper and lower ends of the cylinder barrel (11), the piston seat (14) being slidingly installed in the cylinder barrel (11) and separating the cylinder barrel (11) into an upper chamber (111) and a lower chamber (112), and the piston rod (15) being fixedly connected to the top of the piston seat (14) and slidingly inserted into the axial center of the upper end cover (12). characterized in that Further comprising a plunger rod (16) fixedly installed at the axial center of the lower end cover (13) and arranged in the vertical direction, an axial center of the piston rod (15) being provided with a guide through cavity (151) slidingly inserted with the plunger rod (16), the top and bottom of the guide through cavity (151) being provided with an upper buffer groove (1511) and a lower buffer groove (1512), respectively, the inner diameters of the upper buffer groove (1511) and the lower buffer groove (1512) being greater than the inner diameter of the guide through cavity (151), the bottom port of the guide through cavity (151) being sealingly fitted with the plunger rod (16), and an axial center of the plunger rod (16) being provided with an oil delivery passage (161), the top end of the oil delivery passage (161) being in communication with the guide through cavity (151). The upper end cover (12) is provided with an oil inlet and outlet passage A (121), the oil inlet and outlet passage A (121) being in communication with the upper chamber (111), the lower end cover (13) is provided with an oil inlet and outlet passage B (131) and an oil inlet and outlet passage C (132), the oil inlet and outlet passage B (131) being in communication with the oil delivery passage (161), and the oil inlet and outlet passage C (132) being in communication with the lower chamber (112). Further comprising an oil adjusting assembly, the oil adjusting assembly being connected with the oil inlet and outlet passage A (121), the oil inlet and outlet passage B (131), and the oil inlet and outlet passage C (132) in a matched manner and being used for adjusting the transmission state of the hydraulic oil. The oil liquid adjusting assembly comprises a mounting seat (21), an adjusting motor (22), an adjusting sleeve (23), a valve shell (24), a valve core (25) and a guide rod (26), the adjusting sleeve (23) is rotationally installed on the mounting seat (21), the adjusting motor (22) is fixedly installed on the mounting seat (21) and is in power connection with the adjusting sleeve (23), the inner wall of the adjusting sleeve (23) is provided with three groups of cam grooves (231) arranged at different height positions, each group of the cam grooves (231) is matched with a group of the guide rods (26), the valve shell (24) is fixedly installed on the mounting seat (21) and is arranged below the adjusting sleeve (23), three groups of sliding through grooves (241) are formed in the valve shell (24), the oil inlet and outlet passages A (121), B (131) and C (132) are in communication with a group of the sliding through grooves (241) respectively, and each group of the sliding through grooves (241) is fitted with a group of the valve cores (25), and the valve core (25) is fixedly connected with the guide rod (26) at the corresponding position.

2. A curing press lock mold hydraulic cylinder according to claim 1 wherein: A mounting recess A (152) is formed at the top end axis of the piston rod (15), the top end of the guide through cavity (151) is in communication with the mounting recess A (152), a tray (17) arranged above the upper end cover (12) is fixedly installed in the mounting recess A (152), the tray (17) is in sealing and close-fitting connection with the top end of the guide through cavity (151), and the tray (17) is used for fixedly installing a lower mold of a locking mold.

3. A curing press lock mold hydraulic cylinder according to claim 2 wherein: A mounting recess B (136) is formed at the top axis of the lower end cover (13), the plunger rod (16) is fixedly installed in the mounting recess B (136), and the piston seat (14) is in nested combination with the plunger rod (16) when the piston seat (14) is at the bottom end of the stroke.

4. A curing press lock mold hydraulic cylinder according to claim 2 wherein: A speed regulating valve rod (181) arranged in the oil conveying passage (161) is fixedly installed at the axis of the tray (17), the speed regulating valve rod (181) is in the form of a rod-shaped structure with thick ends and a thin middle, a speed regulating valve sleeve (182) arranged at the periphery of the speed regulating valve rod (181) is fixedly installed at the top end of the plunger rod (16), and gaps are formed between the speed regulating valve rod (181) and the inner walls of the oil conveying passage (161) and the speed regulating valve sleeve (182).

5. A curing press lock mold hydraulic cylinder according to claim 1 wherein: A connecting cover (232) is fixedly installed at the top end of the adjusting sleeve (23), a worm wheel (233) is fixedly connected at the axis of the connecting cover (232), a worm (221) is coaxially fixedly connected to the output shaft of the adjusting motor (22), and the worm (221) is rotationally installed on the mounting seat (21) and is in matched combination with the worm wheel (233).

6. A curing press lock mold hydraulic cylinder of claim 1 wherein: Each group of the cam grooves (231) comprises upper guide grooves (2311), middle guide grooves (2312) and lower guide grooves (2313) arranged at different height positions, and the upper guide grooves (2311), the middle guide grooves (2312) and the lower guide grooves (2313) are spliced to form a closed loop through inclined guide grooves (3214).

7. A curing press lock mold hydraulic cylinder of claim 6 wherein: Each group of sliding grooves (241) is connected with a transversely arranged assembly interface A (243), an assembly interface B (244), and an assembly interface C (245), the assembly interface B (244) and the assembly interface C (245) are oppositely arranged with the assembly interface A (243), the assembly interface B (244) and the assembly interface C (245) are arranged on both sides of the assembly interface A (243) respectively, and each group of assembly interface A (243) is connected with the inlet and outlet oil way A (121), the inlet and outlet oil way B (131), and the inlet and outlet oil way C (132) respectively; An oil supply groove (251) is arranged on the valve core (25) in an axial direction and is always in communication with the assembly interface, a radial interface (252) is arranged on the middle section of the valve core (25) and is in communication with the oil supply groove (251), and the radial interface (252) can be connected with the assembly interface B (244) and the assembly interface C (245) to realize the connection and communication.

8. A curing press lock mold hydraulic cylinder of claim 7 wherein: The assembly interface B (244) and the assembly interface C (245) are respectively provided with a first one-way valve (271) and a second one-way valve (272), and the first one-way valve (271) and the second one-way valve (272) are oppositely arranged.

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