A hydraulic cylinder anti-leakage detection mechanism and method for vacuum laminator

Abstract

The present invention relates to the technical field of hydraulic cylinders, and specifically to a leakage prevention detection mechanism and method for a hydraulic cylinder of a vacuum laminating machine, including: a follower plate connected to the piston rod, and a plurality of sets of protrusions are equidistantly arranged on the follower plate; an energy storage assembly connected to the hydraulic cylinder, and the energy storage assembly can be triggered by the protrusions to move towards or away from the follower plate; a reverse extension assembly connected to the energy storage assembly, when the energy storage assembly moves away from the follower plate, the reverse extension assembly can be inserted into the locking grooves equidistantly arranged on the follower plate; a switching assembly communicated with the hydraulic cylinder, and when the energy storage assembly moves away from the follower plate, the switching assembly can cut off the oil pipeline connecting the hydraulic cylinder, so as to improve the stability when the piston rod drives an object to move.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and specifically to a leakage prevention detection mechanism and method for a hydraulic cylinder of a vacuum laminating machine. Background Art

[0002] In the electronics industry, vacuum laminating machines are widely used in fields such as electronic components, flat panel displays, and LEDs. Through a vacuum laminating machine, different materials can be precisely laminated together at high temperatures to form high-precision and high-strength electronic products.

[0003] During the production process of a vacuum laminating machine, a hydraulic cylinder is required to cooperate for loading and unloading materials. Frequent lifting and lowering actions can cause oil leakage in the hydraulic cylinder. The main reasons include damage to the seals inside the hydraulic cylinder resulting in a decrease in sealing performance, and rupture or detachment from the corresponding connectors of the hydraulic oil pipeline due to long-term pressure. At this time, the lifted object will accelerate and fall due to the loss of support force, thereby causing a phenomenon of drop damage.

[0004] In the prior art, a ratchet structure is often used to prevent drops caused by hydraulic failure, but it often only works well during hydraulic lifting and holding. A better solution is still needed for the problem of drops caused by hydraulic failure during the descent process. Summary of the Invention

[0005] The purpose of the present invention is to provide a leakage prevention detection mechanism and method for a hydraulic cylinder of a vacuum laminating machine, which can quickly respond to and protect against the problem of drops caused by hydraulic failure during the descent process, so as to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A leakage prevention detection mechanism for a hydraulic cylinder of a vacuum laminating machine, including a base, on which a hydraulic cylinder is provided, and a piston rod is installed inside the hydraulic cylinder;

[0008] It further includes:

[0009] A follower plate, connected to the piston rod, and a plurality of protruding parts are equidistantly arranged on the follower plate;

[0010] An energy storage component, connected to the hydraulic cylinder, and the energy storage component can be triggered by the protruding parts to move towards or away from the follower plate;

[0011] A reverse extension component, connecting the energy storage component, and when the energy storage component moves away from the follower plate, the reverse extension component can be inserted into the locking grooves equidistantly arranged on the follower plate;

[0012] A switching component, which is communicated with the oil cylinder. When the energy storage component moves away from the follower plate, the switching component can cut off the oil pipeline connecting the oil cylinder.

[0013] As a further solution of the present invention: A connecting frame is connected to the oil cylinder. The energy storage component includes a guiding part fixedly installed on the connecting frame. A transverse moving rod is arranged on the guiding part. One end of the transverse moving rod is rotatably installed with a first abutting wheel adapted to the protruding part. And two groups of symmetric inclined parts are arranged at the bottom of the transverse moving rod. An outward protruding part protruding downward is arranged at the connection of the two groups of inclined parts;

[0014] The energy storage component further includes an elastic structure arranged on the connecting frame. The elastic structure is in rolling cooperation with the inclined part.

[0015] As a further solution of the present invention: The elastic structure includes a first sliding groove arranged on the connecting frame. A lifting part is slidably installed in the first sliding groove. The lifting part is connected with the inner wall of the first sliding groove through a cylindrical spring;

[0016] A second abutting wheel is also rotatably installed on the lifting part. When the piston rod stalls and descends, the second abutting wheel can move from one group of inclined parts to the other group of inclined parts.

[0017] As a further solution of the present invention: A counterweight part is fixedly installed at one end of the transverse moving rod away from the first abutting wheel.

[0018] As a further solution of the present invention: A second sliding groove and a third sliding groove perpendicular to each other are also arranged on the connecting frame;

[0019] The reverse extension component includes a driven part slidably installed in the second sliding groove and a bracket slidably installed in the third sliding groove. A locking plate is detachably connected to the bracket. The locking plate is adapted to the locking groove. The bracket and the driven part are connected through a support rod;

[0020] The reverse extension component further includes a groove shaft structure connecting the driven part and the counterweight part. When the second abutting wheel moves in one group of the inclined parts and does not move to the outward protruding part, the driven part remains stationary.

[0021] As a further solution of the present invention: The groove shaft structure includes a connecting plate fixedly connected to the counterweight part. A convex shaft is installed at the end of the connecting plate;

[0022] The groove shaft structure further includes a horizontal groove and an inclined groove arranged on the driven part and facing the side of the convex shaft. The length of the horizontal groove is the same as the projection lengths of the inclined part and the inclined groove on the horizontal plane.

[0023] As a further solution of the present invention: The switching component includes a pressure sensor communicated with the oil cylinder and a connector arranged on the base. A first cavity and a second cavity are formed in the connector, and the first cavity and the second cavity are respectively communicated with the oil cylinder;

[0024] The switching component further includes an adjusting structure, and the adjusting structure is electrically connected with the pressure sensor.

[0025] As a further solution of the present invention: The adjusting structure includes a second plugging member and a first plugging member respectively arranged in the first cavity and the second cavity. Second through holes with displacement are arranged on the first plugging member and the second plugging member;

[0026] The adjusting structure further includes a stepping motor fixedly installed on the connector. Two switching members respectively slidably attached to the first plugging member and the second plugging member are connected to the output shaft of the stepping motor. Coaxial first through holes are arranged on the two switching members.

[0027] A working method of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminating machine as described above includes the following steps:

[0028] Step 1: Connect the switching component with an external oil pumping device through pipelines;

[0029] Step 2: Start the external oil pumping device to pump hydraulic oil into the oil cylinder, so that the piston rod rises;

[0030] Step 3: When the oil pressure in the oil cylinder exceeds the preset value, the switching component can cut off the oil pipeline between the external oil pumping device and the oil cylinder;

[0031] Step 4: When the oil pressure in the oil cylinder is lost due to hydraulic oil leakage, the piston rod will drive the follower plate to move downward at a stall speed. When the protruding part abuts against the energy storage component, the trigger component will move away from the follower plate and drive the reverse extension component to insert into the locking groove, so that the height of the piston rod is locked.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] Through the arranged energy storage structure, when the piston rod stalls and accelerates downward, the protruding part can cooperate with the first abutting wheel, so that the crosswise rod moves quickly, and drives the reverse extension component to lock the follower plate in time, preventing the piston rod from further rapidly moving downward, resulting in too large a destructive force in the subsequent process, triggering a safety accident, and ensuring that the impact force when the follower plate is combined with the reverse extension component is smaller, improving the durability of the reverse extension component;

[0034] By setting the reverse extension component, it can be ensured that when the piston rod drives the object to move at a normal speed, the locking plate and the follower plate are misaligned, thereby preventing the piston rod from being locked when it moves at a normal speed. When the piston rod stalls and moves downward quickly, the convex shaft can cooperate with the inclined groove to move the follower downward and drive the locking plate to insert into the locking groove, so that the stalling movement of the piston rod is locked, effectively preventing the risk of the object on the piston rod from stalling and falling.

[0035] By setting up a switching component, the oil inlet pipe and the oil return pipe can be connected separately, and when the hydraulic oil flows through the oil inlet pipe, the oil return pipe can be cut off from the external oil pumping device. When the hydraulic oil flows through the oil return pipe, the oil inlet pipe can be cut off from the external oil pumping device, thereby reducing the risk of the oil inlet pipe and the oil return pipe being broken or separated from the corresponding interface and causing pressure loss in the oil cylinder. At the same time, when the hydraulic oil leaks, the oil inlet pipe and the oil return pipe can be synchronously cut off from the external oil pumping device to ensure the hydraulic oil pressure in the oil cylinder as much as possible, while maintaining the height of the piston rod, cooperating with the locking of the follower plate, and improving the stability of the piston rod after stalling. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A structural schematic diagram of an embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0037] Figure 2 A structural schematic diagram of another angle of an embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0038] Figure 3 A schematic diagram of the internal structure of a hydraulic cylinder in an embodiment of a leakage prevention detection mechanism for a vacuum laminator;

[0039] Figure 4 It is a structural schematic diagram of an energy storage component and a reverse extension component in one embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0040] Figure 5 It is a structural schematic diagram of an energy storage component and a reverse extension component from another angle in one embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0041] Figure 6 It is a structural exploded diagram of an energy storage component in one embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0042] Figure 7 A schematic diagram of the structure of a transverse shift rod in one embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0043] Figure 8 A schematic structural diagram of a reverse extension assembly in one embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator;

[0044] Figure 9 The structural explosion diagram of the groove shaft structure in an embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminating machine;

[0045] Figure 10 The internal structure schematic diagram of the communicating vessel in an embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminating machine;

[0046] Figure 11 The structural explosion diagram of the adjusting structure in an embodiment of a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminating machine.

[0047] In the figure: 1, base; 2, hydraulic cylinder; 3, piston rod; 4, follower plate; 5, protrusion; 6, locking groove; 7, connecting frame; 701, first chute; 702, second chute; 703, third chute; 8, first abutting wheel; 9, transverse rod; 10, guiding part; 11, counterweight part; 12, connecting plate; 13, convex shaft; 14, second abutting wheel; 15, lifting member; 16, cylindrical spring; 17, inclined part; 18, driven member; 1801, horizontal groove; 1802, inclined groove; 19, support rod; 20, bracket; 21, locking plate; 22, pressure sensor; 23, communicating vessel; 24, first cavity; 25, second cavity; 26, stepper motor; 27, first plugging member; 28, second plugging member; 29, switching member; 30, first guide through hole; 31, second guide through hole. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, which can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

[0050] Please refer to Figures 1 to 11 , in the embodiment of the present invention, a hydraulic cylinder anti-leakage detection mechanism for a vacuum laminating machine includes a base 1, a hydraulic cylinder 2 is disposed on the base 1, and a piston rod 3 is installed in the hydraulic cylinder 2;

[0051] It further includes: a follower plate 4, an energy storage assembly, a reverse extension assembly, and a switching assembly.

[0052] The follower plate 4 is connected to the piston rod 3. A plurality of groups of protrusions 5 are equidistantly arranged on the follower plate 4. When hydraulic oil is injected into the oil cylinder 2 and the piston rod 3 moves, it can drive the follower plate 4 to perform lifting and lowering actions synchronously.

[0053] The energy storage assembly is connected to the oil cylinder 2, and the energy storage assembly can be triggered by the protrusion 5 to move towards or away from the follower plate 4.

[0054] A connecting frame 7 is connected to the oil cylinder 2. The energy storage assembly includes a guiding part 10 fixedly installed on the connecting frame 7. A transverse moving rod 9 is arranged on the guiding part 10. One end of the transverse moving rod 9 is rotatably installed with a first abutting wheel 8 adapted to the protrusion 5, and two symmetric inclined parts 17 are arranged at the bottom of the transverse moving rod 9. A protruding part protruding downward is arranged at the connection of the two inclined parts 17.

[0055] The energy storage assembly further includes an elastic structure arranged on the connecting frame 7. The elastic structure is in rolling cooperation with the inclined part 17. The elastic structure includes a first sliding groove 701 arranged on the connecting frame 7. A lifting member 15 is slidably installed in the first sliding groove 701. The lifting member 15 is connected to the inner wall of the first sliding groove 701 through a cylindrical spring 16.

[0056] A second abutting wheel 14 is also rotatably installed on the lifting member 15. When the piston rod 3 stalls and descends, the second abutting wheel 14 can move from one inclined part 17 to the other inclined part 17.

[0057] In the initial state, the cylindrical spring 16 is in a compressed state. At this time, the second abutting wheel 14 abuts against the end of a set of inclined portions 17 away from the follower plate 4. At this time, the cylindrical spring 16 has a tendency to release elastic potential energy, and can make the second abutting wheel 14 have a tendency to be stable at the end of this set of inclined portions 17, so that the first abutting wheel 8 just fits against the outside of the follower plate 4. And when the piston rod 3 drives an object to move up and down at a predetermined speed, it can drive the follower plate 4 to move synchronously. During this process, when the protrusion 5 abuts against the first abutting wheel 8, the first abutting wheel 8 can drive the transverse movement rod 9 to move away from the follower plate 4. At this time, although the second abutting wheel 14 can move along the above-mentioned inclined portions 17, it will not move to the protruding portion. And when the protrusion 5 moves away from the first abutting wheel 8, the elastic potential energy is released by the cylindrical spring 16, so that the second abutting wheel 14 moves to the end of the above-mentioned inclined portions 17 again. That is, when the piston rod 3 performs the lifting and lowering action at a predetermined speed, the reverse extension assembly will not be triggered to act through the transverse movement rod 9, and it is avoided that when the piston rod 3 operates normally, the follower plate 4 is combined with the reverse extension assembly to cause the piston rod 3 to be locked.

[0058] When a pressure loss occurs due to hydraulic oil leakage, since an object is supported on the top of the piston rod 3, at this time, the object will drive the piston rod 3 to accelerate downward under the action of gravity, and drive the follower plate 4 to accelerate downward synchronously. At this time, when the protrusion 5 abuts against the first abutting wheel 8, the first abutting wheel 8 can be impacted to a certain extent, so that it can drive the second abutting wheel 14 to move from the above-mentioned inclined portions 17 to the protruding portion through the transverse movement rod 9, and further move to another set of inclined portions 17. At this time, the cylindrical spring 16 can continue to drive the transverse movement rod 9 to move away from the follower plate 4 by releasing potential energy, and make the reverse extension assembly act quickly, and insert into the locking groove 6, so that the follower plate 4 is locked, and further lock the stall downward movement of the piston rod 3, preventing the piston rod 3 from continuously moving downward at high speed, causing the object to fall and triggering a safety accident.

[0059] Furthermore, during the process of the piston rod 3 stalling and moving downward rapidly, the protrusion 5 can impact the first abutting wheel 8, so that the transverse movement rod 9 has a certain initial velocity. At the same time, the cylindrical spring 16 is further compressed. Among them, under the action of the initial velocity of the transverse movement rod 9 and its own inertia, after the first abutting wheel 8 is separated from the protrusion 5, the transverse movement rod 9 can continue to move away from the follower plate 4, so that the second abutting wheel 14 can move past the protruding portion. Subsequently, the cylindrical spring 16 drives the transverse movement rod 9 to accelerate away from the follower plate 4 by releasing elastic potential energy, so that the reverse extension assembly can quickly insert into the locking groove 6, and lock the stall downward movement of the piston rod 3 in time, avoiding that when the piston rod 3 accelerates to ultra-high speed and combines with the reverse extension assembly, the reverse extension assembly is damaged due to excessive impact.

[0060] One end of the transverse movement rod 9 away from the first abutting wheel 8 is fixedly installed with a counterweight portion 11.

[0061] By adding the counterweight portion 11 to the transverse movement rod 9, the mass of the transverse movement rod 9 can be increased, so that the inertia it has during movement is greater, thereby ensuring that when the piston rod 3 and the follower plate 4 stall and move downward, and the protruding portion 5 impacts the first abutting wheel 8, the transverse movement rod 9 can have sufficient inertia to enable the protruding portion to move from one side of the second abutting wheel 14 to the other side, so that during the process of the cylindrical spring 16 releasing elastic potential energy, the reverse extension assembly can cooperate with the locking groove 6 to realize the locking of the piston rod 3.

[0062] Through the above settings, when the piston rod 3 stalls and accelerates downward, the protruding portion 5 can cooperate with the first abutting wheel 8, so that the transverse movement rod 9 moves quickly, and drives the reverse extension assembly to lock the follower plate 4 in time, preventing the piston rod 3 from further rapidly moving downward, resulting in too much damage force in the subsequent process, causing safety accidents, and ensuring that the impact force when the follower plate 4 is combined with the reverse extension assembly is smaller, improving the durability of the reverse extension assembly.

[0063] Please refer to Figures 4 to 5 、 Figures 7 to 9 As shown in, the reverse extension assembly is connected to the counterweight portion 11. When the energy storage assembly moves away from the follower plate 4, the reverse extension assembly can be inserted into the locking grooves 6 equidistantly arranged on the follower plate 4;

[0064] A second sliding groove 702 and a third sliding groove 703 perpendicular to each other are further arranged on the connecting frame 7;

[0065] The reverse extension assembly includes a follower 18 slidably installed in the second sliding groove 702 and a bracket 20 slidably installed in the third sliding groove 703. A locking plate 21 is detachably connected to the bracket 20. The locking plate 21 is adapted to the locking groove 6. The bracket 20 and the follower 18 are connected by a support rod 19. Among them, in the initial state, the locking plate 21 and the end of the protruding portion 5 away from the follower plate 4 are in a separated state, that is, when the protruding portion 5 follows the follower plate 4 to move up and down at a predetermined speed, the locking plate 21 will not contact the protruding portion 5;

[0066] The reverse extension assembly further includes a groove shaft structure connecting the follower 18 and the counterweight portion 11. When the second abutting wheel 14 moves in one of the inclined portions 17 and has not moved to the protruding portion, the follower 18 remains stationary. The groove shaft structure includes a connecting plate 12 fixedly connected to the counterweight portion 11, and a convex shaft 13 is installed at the end of the connecting plate 12;

[0067] The groove shaft structure further includes a horizontal groove 1801 and an inclined groove 1802 provided on the follower 18 and facing the convex shaft 13. The length of the horizontal groove 1801 is the same as the projection lengths of the inclined portion 17 and the inclined groove 1802 on the horizontal plane.

[0068] When the piston rod 3 and the follower plate 4 rise or fall at a predetermined speed, the protrusion 5 cooperates with the first abutting wheel 8, and only causes the second abutting wheel 14 to reciprocate along the inclined portion 17 away from the follower plate 4. At this time, the connecting plate 12 will also reciprocate following the cross rod 9. During this process, the convex shaft 13 on the connecting plate 12 can reciprocate within the horizontal groove 1801, keeping the follower 18 at a constant height. At this time, the position of the locking plate 21 is stationary, avoiding the combination of the locking plate 21 and the locking groove 6 when the piston rod 3 operates normally and preventing the normal operation of the piston rod 3.

[0069] When the piston rod 3 stalls and moves rapidly downward, the protrusion 5 can impact the first abutting wheel 8, causing the cross rod 9 to move to a position where the second abutting wheel 14 moves past the protrusion. Subsequently, during the process of the cylindrical spring 16 releasing elastic potential energy, the convex shaft 13 will move further away from the follower plate 4. At this time, the convex shaft 13 will move within the inclined groove 1802, causing the follower 18 to move downward, and driving the support rod 19 to move the bracket 20 towards the follower plate 4 until the locking plate 21 can be inserted into the locking groove 6, completing the locking of the follower plate 4 and locking the piston rod 3 in time to prevent the object on the piston rod 3 from following the piston rod 3 and stalling and dropping, resulting in a risk of falling.

[0070] It should be noted that when the second abutting wheel 14 moves past the protrusion, the cylindrical spring 16 can actively release elastic potential energy to make the locking plate 21 move towards the follower plate 4. However, if the locking plate 21 does not coincide with the locking groove 6 in height at this time and cannot be inserted into the locking groove 6, the cylindrical spring 16 is still in the state of releasing elastic potential energy and can make the locking plate 21 abut against the follower plate 4. At the same time, the locking plate 21 has a force applied to the follower plate 4, so that once the locking groove 6 coincides with the locking plate 21 in height, the locking plate 21 can be inserted into the locking groove 6 to lock the follower plate 4.

[0071] Through the above settings, it can be ensured that when the piston rod 3 drives an object to move at a normal speed, the locking plate 21 is misaligned with the follower plate 4, avoiding the piston rod 3 being locked when moving at a normal speed. When the piston rod 3 stalls and moves rapidly downward, the convex shaft 13 can cooperate with the inclined groove 1802, causing the follower 18 to move downward and driving the locking plate 21 to be inserted into the locking groove 6, locking the stall movement of the piston rod 3 and effectively preventing the object on the piston rod 3 from stalling and falling.

[0072] Please refer to Figures 10 to 11, the switching component is communicated with the oil cylinder 2, and when the energy storage component moves away from the follower plate 4, the switching component can cut off the oil pipeline connecting the oil cylinder 2;

[0073] The switching component includes a pressure sensor 22 communicated with the oil cylinder 2 and a connector 23 arranged on the base 1. A first cavity 24 and a second cavity 25 are formed in the connector 23, and the first cavity 24 and the second cavity 25 are respectively communicated with the oil cylinder 2;

[0074] The switching component further includes an adjusting structure, and the adjusting structure is electrically connected with the pressure sensor 22. The adjusting structure includes a second plugging member 28 and a first plugging member 27 respectively arranged in the first cavity 24 and the second cavity 25. Misaligned second guide through holes 31 are arranged on the first plugging member 27 and the second plugging member 28;

[0075] The adjusting structure further includes a stepping motor 26 fixedly installed on the connector 23. Two sets of switching members 29 respectively slidably attached to the first plugging member 27 and the second plugging member 28 are connected to the output shaft of the stepping motor 26. Coaxial first guide through holes 30 are arranged on the two sets of switching members 29;

[0076] It should also be noted that a displacement sensor (not shown in the figure) is arranged on the follower 18, and the above stepping motor 26 is electrically connected with the displacement sensor and the pressure sensor 22.

[0077] Specifically, the first cavity 24 is connected to the return oil pipe of the external oil pumping component, and the second cavity 25 is connected to the inlet oil pipe of the external oil pumping device. In the state of pumping oil into the oil cylinder 2, the first guide through hole 30 on the switching member 29 and the second guide through hole 31 on the first plugging member 27 are in a coincident state, and the first guide through hole 30 on the other set of switching members 29 and the second guide through hole 31 on the second plugging member 28 are in a misaligned state. At this time, the hydraulic oil can enter the oil cylinder 2 through the second cavity 25. At this time, since the second guide through hole 31 on the second plugging member 28 is in a blocked state, the hydraulic oil in the oil cylinder 2 can be disconnected from the return oil pipe, so that when the oil pressure in the oil cylinder 2 rises, the return oil pipe will not bear the oil pressure, and the risk of its rupture and disconnection from the corresponding interface causing pressure loss in the oil cylinder 2 is reduced.

[0078] Similarly, in the state of sucking back the hydraulic oil, the first guide through hole 30 on the switching member 29 and the second guide through hole 31 on the first plugging member 27 are in a misaligned state, and the first guide through hole 30 on the other set of switching members 29 and the second guide through hole 31 on the second plugging member 28 are in a coincident state. At this time, the hydraulic oil can enter the external oil pumping device through the return oil pipe, so that in this state, the inlet oil pipe will not bear the oil pressure, and the risk of its rupture and disconnection from the corresponding interface causing pressure loss in the oil cylinder 2 is reduced.

[0079] When pumping oil to drive the piston rod 3 to move upward, if the oil pressure in the cylinder 2 exceeds the preset value, the pressure sensor 22 can control the stepper motor 26 to operate, so that the second conducting holes 31 on the first blocking member 27 and the second blocking member 28 are both in a blocked state. At this time, the oil inlet pipe and the oil return pipe are both disconnected, and the oil pressure in the cylinder 2 is prevented from further rising, thereby avoiding the risk of the oil inlet pipe breaking and separating from the corresponding structure.

[0080] Furthermore, when the hydraulic oil leaks and causes the piston rod 3 to lose speed and move downward, the follower 18 can be actuated to lock the follower plate 4 through the locking plate 21. At this time, the displacement sensor controls the stepper motor 26 to actuate, so that the second conducting holes 31 on the first blocking member 27 and the second blocking member 28 are both in a blocked state, so as to ensure the hydraulic oil pressure in the cylinder 2 as much as possible and maintain the height of the piston rod 3. This cooperates with the locking of the follower plate 4 to improve the stability of the piston rod 3 after being locked.

[0081] Through the above-mentioned arrangement, the oil inlet pipe and the oil return pipe can be independently connected, and when the hydraulic oil flows through the oil inlet pipe, the oil return pipe can be cut off from the external oil pumping device. When the hydraulic oil flows through the oil return pipe, the oil inlet pipe can be cut off from the external oil pumping device, thereby reducing the risk of the oil inlet pipe and the oil return pipe being broken or detached from the corresponding interface and causing pressure loss in the oil cylinder 2. At the same time, when the hydraulic oil leaks, the oil inlet pipe and the oil return pipe can be synchronously cut off from the external oil pumping device to ensure the hydraulic oil pressure in the oil cylinder 2 as much as possible while maintaining the height of the piston rod 3. This cooperates with the locking of the follower plate 4 to improve the stability of the piston rod 3 after stalling.

[0082] As an embodiment of the present invention, a working method of the hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator is also proposed, comprising the following steps:

[0083] Step 1: Connect the switching assembly to the external oil pumping device through pipelines;

[0084] Step 2: Start the external oil pumping device to pump the hydraulic oil into the oil cylinder 2, so that the piston rod 3 rises;

[0085] Step 3: When the oil pressure in the oil cylinder 2 exceeds a preset value, the switching component can cut off the oil pipeline between the external oil pump device and the oil cylinder 2;

[0086] Step 4: When the oil cylinder 2 loses pressure due to hydraulic oil leakage, the piston rod 3 will drive the follower plate 4 to move downward at a stall speed, and when the protrusion 5 abuts against the energy storage assembly, the trigger assembly will move away from the follower plate 4 and drive the reverse extension assembly to be inserted into the locking groove 6, so that the height of the piston rod 3 is locked.

[0087] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0088] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic cylinder anti-leakage detection mechanism for a vacuum laminator, comprising a base (1), a cylinder (2) being arranged on the base (1), and a piston rod (3) being installed in the cylinder (2); It is characterized in that Also includes: A follower plate (4) connected to the piston rod (3), wherein a plurality of groups of protrusions (5) are equidistantly arranged on the follower plate (4); An energy storage component connected to the oil cylinder (2), wherein the energy storage component can be triggered by the protrusion (5) to move toward or away from the follower plate (4); A reverse extension component connected to the energy storage component, wherein when the energy storage component moves away from the follower plate (4), the reverse extension component can be inserted into a locking groove (6) equidistantly arranged on the follower plate (4); a switching component connected to the oil cylinder (2), wherein the switching component is capable of cutting off the oil pipeline connected to the oil cylinder (2) when the energy storage component moves away from the follower plate (4); The oil cylinder (2) is connected to a connecting frame (7), the energy storage assembly comprises a guide portion (10) fixedly mounted on the connecting frame (7), a transverse rod (9) is arranged on the guide portion (10), a first abutment wheel (8) adapted to the protrusion (5) is rotatably mounted on one end of the transverse rod (9), and two groups of symmetrical inclined portions (17) are arranged at the bottom of the transverse rod (9), and a downwardly protruding outer protrusion is arranged at the connection between the two groups of inclined portions (17); The energy storage assembly further comprises an elastic structure arranged on the connecting frame (7), the elastic structure and the inclined portion (17) being in rolling cooperation; The elastic structure comprises a first slide groove (701) arranged on the connecting frame (7), a lifting member (15) is slidably installed in the first slide groove (701), and the lifting member (15) is connected to the inner wall of the first slide groove (701) via a columnar spring (16); A second abutment wheel (14) is also rotatably mounted on the lifting member (15); when the piston rod (3) stalls and descends, the second abutment wheel (14) can move from one set of inclined portions (17) to the other set of inclined portions (17); A counterweight (11) is fixedly mounted on one end of the transverse rod (9) away from the first abutment wheel (8); The connecting frame (7) is also provided with a second slide groove (702) and a third slide groove (703) which are perpendicular to each other; The reverse extension assembly comprises a follower (18) slidably mounted in the second slide groove (702) and a bracket (20) slidably mounted in the third slide groove (703), a locking plate (21) being detachably connected to the bracket (20), the locking plate (21) being adapted to fit the locking groove (6), and the bracket (20) and the follower (18) being connected via a support rod (19); The reverse extension assembly also includes a slotted shaft structure connecting the follower (18) and the counterweight portion (11), and when the second abutment wheel (14) moves within one set of the inclined portions (17) and does not move to the outer protrusion, the follower (18) remains stationary.

2. The anti-leakage detection mechanism for a hydraulic cylinder for a vacuum laminator according to claim 1 is characterized in that: The slotted shaft structure comprises a connecting plate (12) fixedly connected to the counterweight portion (11), and a convex shaft (13) is mounted on an end of the connecting plate (12); The grooved shaft structure further comprises a horizontal groove (1801) and an inclined groove (1802) which are arranged on the follower (18) and face the side of the convex shaft (13); the length of the horizontal groove (1801) is the same as the projection length of the inclined portion (17) and the inclined groove (1802) on the horizontal plane.

3. The anti-leakage detection mechanism for a hydraulic cylinder for a vacuum laminator according to claim 1 is characterized in that: The switching assembly comprises a pressure sensor (22) connected to the oil cylinder (2) and a communicating vessel (23) arranged on the base (1), wherein a first cavity (24) and a second cavity (25) are formed in the communicating vessel (23), and the first cavity (24) and the second cavity (25) are respectively connected to the oil cylinder (2); The switching component also includes an adjustment structure, which is electrically connected to the pressure sensor (22).

4. The anti-leakage detection mechanism for a hydraulic cylinder for a vacuum laminator according to claim 3, characterized in that: The regulating structure comprises a second blocking member (28) and a first blocking member (27) respectively arranged in the first cavity (24) and the second cavity (25), wherein the first blocking member (27) and the second blocking member (28) are provided with staggered second conducting holes (31); The regulating structure further comprises a stepping motor (26) fixedly mounted on the communicating vessel (23); the output shaft of the stepping motor (26) is connected to two sets of switching members (29) which are respectively slidably fitted with the first blocking member (27) and the second blocking member (28); and the two sets of switching members (29) are provided with coaxial first conducting holes (30).

5. A working method of the anti-leakage detection mechanism of the hydraulic cylinder for a vacuum laminator according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Connect the switching assembly to the external oil pumping device through pipelines; Step 2: activating the external oil pumping device to pump oil into the oil cylinder (2) to raise the piston rod (3); Step 3: When the oil pressure in the oil cylinder (2) exceeds a preset value, the switching component can cut off the oil pipeline between the external oil pump device and the oil cylinder (2); Step 4: When the oil cylinder (2) loses pressure due to hydraulic oil leakage, the piston rod (3) drives the follower plate (4) to move downward at a stalled speed, and when the protrusion (5) contacts the energy storage component, the trigger component moves away from the follower plate (4) and drives the reverse extension component to be inserted into the locking groove (6), so that the height of the piston rod (3) is locked.

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