A hydraulic coupling oil cylinder piston locking device

Abstract

The application belongs to the technical field of oil cylinders, and particularly relates to a hydraulic coupling oil cylinder piston locking device, which comprises an oil cylinder body, the top of the oil cylinder body is symmetrically provided with two groups of supports, the inner walls of each group of supports are fixedly provided with sliding shafts, the outer walls of the sliding shafts are symmetrically provided with sliding blocks, the outer walls of two sliding blocks close to each other are fixedly provided with elastic members A, and the two elastic members A are respectively sleeved on the outer sides of the two sliding shafts. Through the structures such as the lock, the extrusion assembly and the lifting assembly, the lock can lock the piston at any position, and the lever principle is utilized, the exerted force is amplified and transmitted to the lock through the amplification of the lever, the clamping is more stable due to the fulcrum effect of the lever, the clamping force of the lock can be more evenly distributed on the piston of the oil cylinder, so that the piston is prevented from sliding during the locking process, and the locking effect is better.

Description

A hydraulic coupling cylinder piston locking device Technical Field

[0001] This invention belongs to the field of hydraulic cylinder technology, specifically a hydraulic coupling cylinder piston locking device. Background Technology

[0002] Hydraulic cylinders, also known as hydraulic cylinders, are key actuators in hydraulic systems. They convert hydraulic energy into mechanical energy and drive reciprocating linear motion (or oscillating motion) through the pressure of the liquid. During use, to prevent slippage, a locking device is required to lock the piston of the hydraulic cylinder, ensuring that the piston remains stable in a specific position.

[0003] A Chinese patent with announcement number CN221054057U discloses a hydraulic cylinder locking mechanism. This patent uses hydraulic oil in the hydraulic cylinder to drive the hydraulic rod to operate. When the hydraulic cylinder needs to be locked, the hydraulic rod in the locking assembly extends, driving the through rod at its end to pass through the rod hole on the chuck and extend into the locking hole on the piston rod, thereby achieving the purpose of locking the piston rod on the cylinder body. The structure is simple.

[0004] The aforementioned patent requires a hydraulic rod to be extended and inserted into the lock hole during the locking process. The piston is then restricted by the hydraulic rod to achieve the locking operation. However, since the lock hole is located on the surface of the piston and there is a certain gap between multiple lock holes, the lock hole on the piston's surface needs to be aligned with the hydraulic rod when the piston is extended to perform the locking operation. If the lock hole and the hydraulic rod are not aligned, locking cannot be performed, which presents certain limitations.

[0005] Therefore, the present invention provides a hydraulic coupling cylinder piston locking device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a hydraulic coupling cylinder piston locking device, comprising a cylinder body, two sets of brackets symmetrically fixedly installed on the top of the cylinder body, a sliding shaft fixedly installed between the inner walls of each set of brackets, and sliders symmetrically slidably installed on the outer walls of the sliding shafts. An elastic element A is fixedly installed between the outer walls of two sliders that are close to each other, and the two elastic elements A are respectively sleeved on the outer sides of the two sliding shafts. A lock is fixedly installed between the outer walls of two sliders that are far apart from each other, and both locks are in contact with the cylinder body. A stop block is fixedly installed on the side of the two locks that are far apart from each other, and a pressing component is provided on one side of each of the two stop blocks.

[0008] Preferably, the extrusion assembly includes hinges, two hinges are respectively located above two abutments, an extrusion plate is rotatably mounted on the inner wall of the hinge, the outer walls of the two extrusion plates respectively abut against the outer walls of the two abutments, and a lifting assembly is provided on the outer wall of the cylinder body.

[0009] Preferably, the lifting assembly includes a lifting plate, which is slidably mounted on the outer wall of the cylinder body. Two sets of positioning frames are symmetrically fixedly mounted on the top of the lifting plate. A lifting roller is rotatably mounted between the inner walls of each set of positioning frames. The outer walls of the two lifting rollers respectively abut against the outer walls of the two extrusion plates. A drive assembly is provided below the lifting plate.

[0010] Preferably, the drive assembly includes a positioning disk, which is fixedly installed on the outer wall of the cylinder body. A drive motor is fixedly installed at the bottom of the positioning disk, and a screw is fixedly installed at the output end of the drive motor. The screw passes through the positioning disk and is threadedly connected to the lifting plate. Positioning blocks are symmetrically fixedly installed on the outer wall of the cylinder body. The inner wall of one of the positioning blocks is rotatably connected to the end of the screw away from the drive motor. A limit post is fixedly installed between the other positioning block and the inner wall of the positioning disk. The outer wall of the limit post is slidably connected to the inner wall of the lifting plate.

[0011] Preferably, a clamping block A and a moving block A are slidably installed on the inner wall of the lock, and an elastic element B is fixedly installed between the outer walls of the clamping block A and the moving block A. The clamping block B and the moving block B are symmetrically slidably installed on the inner wall of the lock, and an elastic element C is fixedly installed between the outer walls of the corresponding clamping block B and the moving block B.

[0012] Preferably, the inner wall of the lock is symmetrically fixed with rotating shafts, and the outer wall of each rotating shaft is rotatably mounted with a rotating plate. The outer wall of each rotating plate abuts against the outer wall of the moving block A. Each of the two rotating plates is rotatably mounted with a squeezing roller at one end away from each other, and the outer wall of each squeezing roller abuts against the outer wall of each of the two moving blocks B.

[0013] Preferably, a connecting plate is fixedly installed at the end of the extrusion plate near the hinge, and a cleaning box is provided at the end of the connecting plate away from the extrusion plate.

[0014] Preferably, a connecting block is fixedly installed on the outer wall of the cleaning box, and two connecting blocks are respectively inserted into the inner wall of the connecting plate. The two connecting blocks are fixed to the two connecting plates respectively by a positioning knob.

[0015] Preferably, the inner wall of the cleaning box is detachably fitted with absorbent cotton, the top of the cleaning box is fixedly fitted with a box cover, the top of the cylinder body is fixedly fitted with a side plate, the two hinges are fixedly fitted to the inner wall of the side plate, and the top of the side plate is fixedly fitted with a top plate.

[0016] Preferably, a sliding plate is slidably installed on the inner wall of the limiting post, and an elastic element D is fixedly installed between the sliding plate and the limiting post. An elastic telescopic shaft A and an elastic telescopic shaft B are fixedly installed at both ends of the sliding plate, respectively. The length of the elastic telescopic shaft A is greater than the length of the elastic telescopic shaft B. Two buttons are fixedly installed on the top of the positioning plate. The two buttons are located below the elastic telescopic shaft A and the elastic telescopic shaft B, respectively. One button abuts against the elastic telescopic shaft A, and the other button is in contact with the elastic telescopic shaft B. Two warning lights are fixedly installed on the outer wall of the positioning plate.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The hydraulic coupling cylinder piston locking device of the present invention, through the structure of locking device, pressing component and lifting component, can lock the piston at any position. At the same time, by utilizing the lever principle, the applied force is amplified and transmitted to the locking device through the lever amplification effect. Due to the fulcrum effect of the lever, the clamping is more stable and the clamping force of the locking device can be more evenly distributed on the piston of the cylinder, thereby preventing the piston from sliding during the locking process and making the locking effect better.

[0019] 2. The hydraulic coupling cylinder piston locking device of the present invention provides a reverse elastic force to clamping blocks A and B through the compression of elastic elements B and C, thereby applying a stable clamping force to the workpiece and improving clamping stability. Through the cooperation of the rotating shaft, rotating plate and extrusion roller, the lever principle is used to make elastic elements B and C squeeze each other, achieving force balance and amplification, further increasing the clamping effect and making the locking operation more stable.

[0020] 3. The hydraulic coupling cylinder piston locking device of the present invention, when the piston retracts, the cleaning box remains in contact with the piston, and the cleaning box scrapes off and collects the debris adhering to the piston surface, thereby preventing impurities from following the piston into the interior of the cylinder body and avoiding adverse effects on the cylinder body. When the piston extends, the two locks approach each other again but do not engage with the piston. At this time, the piston has the conditions to move, and the two cleaning boxes are also not in contact with the piston, thereby reducing the risk of wear and damage to the piston. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is an enlarged view of a partial structure of the cylinder body of the present invention;

[0024] Figure 3 is a schematic diagram of the lifting plate structure of the present invention;

[0025] Figure 4 is a schematic diagram of the structure of the extrusion plate of the present invention;

[0026] Figure 5 is a schematic diagram of the lock mechanism of the present invention;

[0027] Figure 6 is a cross-sectional view of the lock structure of the present invention;

[0028] Figure 7 is an enlarged view of the structure at point A in Figure 6 of the present invention;

[0029] Figure 8 is a schematic diagram of the connecting plate structure of the present invention;

[0030] Figure 9 is a schematic diagram of the cleaning box structure of the present invention;

[0031] Figure 10 is a schematic diagram of the structure at the limiting post of the present invention;

[0032] Figure 11 is a cross-sectional view of the limiting column structure of the present invention;

[0033] In the diagram: 1. Cylinder body; 2. Bracket; 3. Sliding shaft; 4. Slider; 5. Elastic element A; 6. Lock; 7. Abutment; 8. Hinge; 9. Extrusion plate; 10. Lifting plate; 11. Positioning frame; 12. Lifting roller; 13. Positioning disc; 14. Drive motor; 15. Screw; 16. Positioning block; 17. Limiting post; 18. Clamping block A; 19. Elastic element B; 20. Moving block A; 21. Clamping block B; 22. Elastic component C; 23. Moving block B; 24. Rotating shaft; 25. Rotating plate; 26. Squeezing roller; 27. Connecting plate; 28. Cleaning box; 29. ​​Connecting block; 30. Positioning knob; 31. Absorbent cotton; 32. Box cover; 33. Side plate; 34. Top plate; 35. Sliding plate; 36. Elastic component D; 37. Elastic telescopic shaft A; 38. Elastic telescopic shaft B; 39. Button; 40. Warning light. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] As shown in Figures 1 to 5, the hydraulic coupling cylinder piston locking device of this embodiment includes a cylinder body 1. Two sets of brackets 2 are symmetrically fixedly installed on the top of the cylinder body 1. A sliding shaft 3 is fixedly installed between the inner walls of each set of brackets 2. Sliding blocks 4 are symmetrically slidably installed on the outer walls of the sliding shafts 3. An elastic element A5 is fixedly installed between the outer walls of two adjacent sliding blocks 4. The two elastic elements A5 are respectively sleeved on the outer sides of the two sliding shafts 3. A locking device 6 is fixedly installed between the outer walls of two distant sliding blocks 4. Both locking devices 6 are in contact with the cylinder body 1. A stop block 7 is fixedly installed on the side of the two locking devices 6 that is far apart from each other. A pressing component is provided on one side of each of the two stop blocks 7. When the cylinder body 1 drives the piston to reach the specified position... After positioning, the pressing component will simultaneously press the abutment 7 from both sides. After being pressed, the abutment 7 will push the two locks 6 closer to each other. The closer locks 6 will clamp the piston of the cylinder body 1, thereby realizing the piston locking operation. Before the locks 6 perform the locking operation, the piston can be extended to any length, so the locking operation can be performed at any position. The locking operation does not need to be performed in an aligned state. Through the cooperation of the sliding shaft 3 and the slider 4, the position of the locks 6 is restricted, ensuring that the locks 6 move in a preset direction. When the locking operation is performed, the elastic element A5 will be compressed by the slider 4. When the pressing component retracts, the locks 6 will separate from the piston under the action of the reverse elastic force of the elastic element A5, thereby avoiding unnecessary friction.

[0036] As shown in Figures 1 to 4, the pressing assembly includes hinges 8, with two hinges 8 located above two blocks 7 respectively. A pressing plate 9 is rotatably mounted on the inner wall of the hinges 8, and the outer walls of the two pressing plates 9 abut against the outer walls of the two blocks 7 respectively. A lifting assembly is provided on the outer wall of the cylinder body 1. During locking, the lifting assembly descends to press one end of the pressing plate 9, causing the pressing plate 9 to rotate around the hinges 8. As the pressing plate 9 rotates, it presses against the blocks 7, bringing the two locks 6 closer together for locking. The rotation of the pressing plate 9 around the hinges 8 utilizes the lever principle, amplifying the applied force and transmitting it to the locks 6. Due to the fulcrum effect of the lever, the clamping is more stable, and the clamping force of the locks 6 is more evenly distributed on the piston of the cylinder, thus preventing the piston from slipping during locking and improving the locking effect.

[0037] As shown in Figures 1 to 4, the lifting assembly includes a lifting plate 10, which is slidably mounted on the outer wall of the cylinder body 1. Two sets of positioning frames 11 are symmetrically fixedly mounted on the top of the lifting plate 10. A lifting roller 12 is rotatably mounted between the inner walls of each set of positioning frames 11. The outer walls of the two lifting rollers 12 respectively abut against the outer walls of the two extrusion plates 9. A drive assembly is provided below the lifting plate 10. When it is necessary to lock the piston of the cylinder, the lifting plate 10 slides downward along the outer wall of the cylinder body 1. When the lifting plate 10 slides, it will drive the lifting roller 12 to move downward through the two sets of positioning frames 11. Since the extrusion plate 9 is inclined, when the lifting roller 12 descends, it will squeeze the extrusion plate 9. The extrusion plate 9, which is squeezed, will rotate around the hinge 8, thereby pushing the lock 6 to perform the locking operation.

[0038] As shown in Figures 1 to 3, the drive assembly includes a positioning disk 13, which is fixedly installed on the outer wall of the cylinder body 1. A drive motor 14 is fixedly installed at the bottom of the positioning disk 13, and a screw 15 is fixedly installed at the output end of the drive motor 14. The screw 15 passes through the positioning disk 13 and is threadedly connected to the lifting plate 10. Positioning blocks 16 are symmetrically fixedly installed on the outer wall of the cylinder body 1. The inner wall of one positioning block 16 is rotatably connected to the end of the screw 15 away from the drive motor 14, and the other positioning block 16 is connected to the positioning disk 13. Limiting posts 17 are fixedly installed between the inner walls of the lifting plate 10 and the outer wall of the limiting posts 17 are slidably connected to the inner wall of the lifting plate 10. When locking, the drive motor 14 drives the screw 15 to rotate. When the screw 15 rotates, it descends through the threaded engagement with the lifting plate 10, thereby causing the lifting roller 12 to descend for locking. Conversely, when it is necessary to release the locking of the piston, the drive motor 14 drives the screw 15 to reverse. At this time, the lifting plate 10 rises, and the two locks 6 will separate under the action of the elastic element A5.

[0039] As shown in Figures 5 and 6, a clamping block A18 and a moving block A20 are slidably mounted on the inner wall of the lock 6. An elastic element B19 is fixedly mounted between the outer walls of the clamping block A18 and the moving block A20. A clamping block B21 and a moving block B23 are symmetrically slidably mounted on the inner wall of the lock 6. An elastic element C22 is fixedly mounted between the outer walls of the corresponding clamping block B21 and the moving block B23. In the initial state, the clamping block A18 and the clamping block B21 are respectively positioned by the elastic elements B19 and C22. Extending downwards to the outside of the locking device 6, when the piston is locked, the locking device 6 will fit against the piston, and the clamping blocks A18 and B21 will be squeezed into the inside of the locking device 6 by the piston. At this time, the elastic elements B19 and C22 are in a compressed state. The compressed elastic elements B19 and C22 will give the clamping blocks A18 and B21 a reverse elastic force, so that the clamping blocks A18 and B21 apply a stable clamping force to the workpiece, thereby improving the clamping stability.

[0040] As shown in Figures 5 to 7, a rotating shaft 24 is symmetrically fixedly installed on the inner wall of the lock 6. A rotating plate 25 is rotatably installed on the outer wall of each rotating shaft 24. The outer wall of each rotating plate 25 abuts against the outer wall of the moving block A20. A pressing roller 26 is rotatably installed at the ends of the two rotating plates 25 that are far apart from each other. The outer walls of the two pressing rollers 26 abut against the outer walls of the two moving blocks B23 respectively. After the elastic element B19 is compressed, the reverse elastic force of the elastic element B19 will be applied to the moving block A20, thereby causing the moving block A20 to press the rotating plate 25. The rotating plate 25 will rotate around the rotating shaft 24. The rotating roller 26 presses against the moving block B23. At the same time, after the elastic element C22 is compressed, the reverse elastic force of the elastic element C22 is also applied to the moving block B23. The moving block B23 presses against the rotating plate 25 through the roller 26. The rotating plate 25 rotates around the rotating shaft 24 and presses against the moving block A20. Through the cooperation of the rotating shaft 24, the rotating plate 25 and the roller 26, the lever principle is used to make the elastic element B19 and the elastic element C22 press against each other, thereby achieving force balance and amplification, further increasing the clamping effect and making the locking operation more stable.

[0041] As shown in Figures 4 and 8, a connecting plate 27 is fixedly installed at the end of the extrusion plate 9 near the hinge 8, and a cleaning box 28 is provided at the end of the connecting plate 27 away from the extrusion plate 9. When the piston of the cylinder body 1 retracts, the two locks 6 will separate from each other, thereby releasing the locking operation on the piston. When the locks 6 separate from each other, the abutment block 7 will press the extrusion plate 9 to make it rotate around the hinge 8. When the extrusion plate 9 rotates, the connecting plate 27 will rotate with the extrusion plate 9. When the connecting plate 27 rotates, it will drive the cleaning box 28 to rotate, and the two cleaning boxes 28 will move closer to each other and... When the cleaning box 28 is in contact with the piston, the piston begins to retract. During the piston retraction, because the cleaning box 28 remains in contact with the piston, it scrapes off and collects the debris adhering to the piston surface, thus preventing impurities from following the piston into the interior of the cylinder body 1 and avoiding adverse effects on the cylinder body 1. When the piston extends, the two locks 6 approach each other again but do not engage with the piston. At this time, the piston has the conditions to move, and the two cleaning boxes 28 are also not engaged with the piston, thereby reducing the risk of wear and damage to the piston.

[0042] As shown in Figures 8 and 9, a connecting block 29 is fixedly installed on the outer wall of the cleaning box 28. The two connecting blocks 29 are respectively inserted into the inner wall of the connecting plate 27. The two connecting blocks 29 are fixed to the two connecting plates 27 respectively by the positioning knob 30. The cleaning box 28 is connected to the connecting plate 27 through the connecting blocks 29 and fixed by the positioning knob 30. When the two cleaning boxes 28 are far apart, the positioning knob 30 is rotated to release the fixation of the connecting blocks 29. Then the cleaning box 28 can be removed to facilitate the treatment of the impurities collected inside the cleaning box 28.

[0043] As shown in Figures 1-2 and 8-9, the inner wall of the cleaning box 28 is detachably fitted with absorbent cotton 31, and a box cover 32 is fixedly installed on the top of the cleaning box 28. A side plate 33 is fixedly installed on the top of the cylinder body 1, and two hinges 8 are fixedly installed on the inner wall of the side plate 33. A top plate 34 is fixedly installed on the top of the side plate 33. When the piston retracts, the cleaning box 28 scrapes off impurities adhering to the piston surface. After scraping, the piston passes through the absorbent cotton 31, which absorbs the liquid adhering to the piston. To keep the piston dry and prevent liquid from entering the cylinder body 1 and causing equipment damage, the cover 32 is designed to reduce the spillage of impurities collected inside the cleaning box 28. The hinge 8 is connected to the side plate 33 to fix the position of the hinge 8. The side plate 33 and the top plate 34 cover the lock 6 to protect it. When the cleaning box 28 is in contact with the piston, the bottom of the cleaning box 28 will be in contact with the top plate 34, which will support the cleaning box 28 and increase its stability.

[0044] As shown in Figures 2 and 10-11, a sliding plate 35 is slidably installed on the inner wall of the limiting post 17. An elastic element D36 is fixedly installed between the sliding plate 35 and the limiting post 17. Elastic telescopic shafts A37 and B38 are fixedly installed at both ends of the sliding plate 35, respectively. The length of elastic telescopic shaft A37 is greater than the length of elastic telescopic shaft B38. Two buttons 39 are fixedly installed on the top of the positioning plate 13. The two buttons 39 are located below elastic telescopic shafts A37 and B38, respectively. One button 39 abuts against elastic telescopic shaft A37, and the other button 39... 9 is fitted to the elastic telescopic shaft B38. Two warning lights 40 are fixedly installed on the outer wall of the positioning plate 13. The two warning lights 40 are electrically connected to the buttons 39 above them. When the button 39 below the elastic telescopic shaft A37 is not pressed, the warning light 40 connected to it is red, and when it is pressed, it is green. When the button 39 below the elastic telescopic shaft B38 is not pressed, the warning light 40 connected to it is green, and when it is pressed, it is red. When the piston needs to be locked, the lifting plate 10 will descend. When the lifting plate 10 descends, it will squeeze the sliding plate 35 to follow it down. When the sliding plate 35 descends, it causes the elastic telescopic shafts A37 and B38 to descend together. Since the length of elastic telescopic shaft A37 is greater than the length of elastic telescopic shaft B38, elastic telescopic shaft A37 will prioritize pressing the button 39 below it. When the piston is locked, the lifting plate 10 stops moving. At this time, elastic telescopic shaft A37 just presses the button 39, while elastic telescopic shaft B38 just contacts the button 39 but cannot press it. At this time, both warning lights 40 are green, and the device is working normally. After the lifting plate 10 stops moving, elastic telescopic shaft A37 fails to... Pressing button 39 will keep the corresponding warning light 40 red, indicating that there may be impurities between the piston and the lock 6, obstructing the movement of the lock 6 and causing the locking operation to fail. When the lifting plate 10 stops moving, pressing button B38 on the elastic telescopic shaft will turn the warning light 40 corresponding to 39 red, indicating that the lock 6 has moved excessively, which may pose a risk of deformation of the lock 6 or the piston. In summary, when both warning lights 40 are green, the device is normal. When one of the two warning lights 40 is red, the device is abnormal and corresponding measures need to be taken to achieve the effect of automatic detection of the device.

[0045] Working principle: When the piston driven by the hydraulic cylinder body 1 reaches the designated position, the extrusion assembly simultaneously extrudes the abutment block 7 from both sides. The abutment block 7, under pressure, pushes the two locking devices 6 closer together. The closer locking devices 6 clamp the piston of the hydraulic cylinder body 1, thus locking the piston. Before locking, the piston can extend to any length, allowing locking at any position. Locking does not require alignment. The position of the locking devices 6 is restricted by the cooperation of the sliding shaft 3 and the slider 4, ensuring they move along a preset direction. During locking, the elastic element A5 contracts under the pressure of the slider 4. When the extrusion assembly retracts, the locking device 6 separates from the piston under the reverse elastic force of the elastic element A5, avoiding unnecessary friction. During locking, the lifting assembly descends to extrude pressure on one end of the extrusion plate 9. The pressing plate 9 rotates around the hinge 8. When the pressing plate 9 rotates, it presses the abutment 7, thereby bringing the two locks 6 closer together for locking. The pressing plate 9 rotates around the hinge 8, and by utilizing the lever principle, the applied force is amplified and transmitted to the lock 6 through the lever's amplification effect. Due to the fulcrum effect of the lever, the clamping is more stable, and the clamping force of the lock 6 can be more evenly distributed on the piston of the cylinder, thereby preventing the piston from sliding during the locking process and making the locking effect better. When locking, the lifting plate 10 slides downward along the outer wall of the cylinder body 1. When the lifting plate 10 slides, it will drive the lifting roller 12 to move downward through the two sets of positioning frames 11. Since the pressing plate 9 is set at an angle, when the lifting roller 12 descends, it will squeeze the pressing plate 9. The pressed pressing plate 9 will then rotate around the hinge 8, thereby pushing the lock 6 to perform the locking operation.

[0046] In the initial state, clamping blocks A18 and B21 extend to the outside of the lock 6 under the action of elastic elements B19 and C22, respectively. When locking the piston, the lock 6 will fit against the piston, and clamping blocks A18 and B21 will be squeezed into the inside of the lock 6 by the piston. At this time, elastic elements B19 and C22 are in a compressed state. The compressed elastic elements B19 and C22 will give clamping blocks A18 and B21 a reverse elastic force, thereby applying a stable clamping force to the workpiece by clamping blocks A18 and B21, thus improving the clamping stability. After the elastic element B19 is compressed, the reverse elastic force of the elastic element B19... The force is applied to the moving block A20, causing it to press against the rotating plate 25. The rotating plate 25 rotates around the rotating shaft 24, causing the pressing roller 26 to press against the moving block B23. At the same time, after the elastic element C22 is compressed, its reverse elastic force is also applied to the moving block B23. The moving block B23 then presses against the rotating plate 25 through the pressing roller 26. The rotating plate 25 rotates around the rotating shaft 24 and presses against the moving block A20. Through the cooperation of the rotating shaft 24, the rotating plate 25, and the pressing roller 26, the lever principle is used to make the elastic elements B19 and C22 press against each other, achieving force balance and amplification, further increasing the clamping effect, and making the locking operation more stable.

[0047] When the piston of the cylinder body 1 retracts, the two locks 6 separate, releasing the locking action on the piston. As the locks 6 separate, the abutment 7 presses against the compression plate 9, causing it to rotate around the hinge 8. As the compression plate 9 rotates, the connecting plate 27 rotates along with it, causing the cleaning boxes 28 to rotate. The two cleaning boxes 28 then move closer together and come into contact with the piston. Once the cleaning boxes 28 are in contact with the piston, the piston begins to retract. During this retraction, because the cleaning boxes 28 remain in contact with the piston, they scrape off and collect any debris adhering to the piston surface, preventing impurities from entering the cylinder body 1 and causing adverse effects. When the piston extends, the two locks 6 move closer together again but do not come into contact with the piston. The piston is capable of movement, and at this time, the two cleaning boxes 28 are not in contact with the piston, thereby reducing the risk of wear and damage to the piston. The cleaning boxes 28 are connected to the connecting plate 27 through the connecting block 29 and are fixed by the positioning knob 30. When the two cleaning boxes 28 are far apart, the positioning knob 30 is turned to release the fixation of the connecting block 29, and then the cleaning boxes 28 can be removed to facilitate the treatment of impurities collected inside the cleaning boxes 28. When the piston retracts, the cleaning boxes 28 will scrape the impurities adhering to the piston surface. After being scraped, the piston will pass through the absorbent cotton 31. The absorbent cotton 31 can absorb the liquid adhering to the piston, keep the piston dry, and prevent liquid from entering the cylinder body 1 with the piston and causing equipment damage. The cover 32 is set to reduce the spillage of impurities collected inside the cleaning boxes 28.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic coupling cylinder piston locking device, comprising a cylinder body, characterized in that: Two sets of brackets are symmetrically fixedly installed on the top of the cylinder body. A sliding shaft is fixedly installed between the inner walls of each set of brackets. Slider blocks are symmetrically slidably installed on the outer walls of each sliding shaft. An elastic element A is fixedly installed between the outer walls of two adjacent sliders, and each elastic element A is sleeved on the outside of one of the two sliding shafts. Locks are fixedly installed between the outer walls of two mutually distant sliders, and both locks are in contact with the cylinder body. A stop block is fixedly installed on the side of each lock that is far from each other, and a pressing component is provided on one side of each stop block. The pressing component includes a hinge. The cylinder body has two hinges located above two abutments. A pressing plate is rotatably mounted on the inner wall of each hinge. The outer walls of the two pressing plates abut against the outer walls of the two abutments. A lifting assembly is provided on the outer wall of the cylinder body. The lifting assembly includes a lifting plate, which is slidably mounted on the outer wall of the cylinder body. Two sets of positioning frames are symmetrically fixed on the top of the lifting plate. A lifting roller is rotatably mounted between the inner walls of each set of positioning frames. The outer walls of the two lifting rollers abut against the outer walls of the two pressing plates. A drive assembly is provided below the lifting plate.

2. The hydraulic coupling cylinder piston locking device according to claim 1, characterized in that: The drive assembly includes a positioning disk, which is fixedly installed on the outer wall of the cylinder body. A drive motor is fixedly installed at the bottom of the positioning disk, and a screw is fixedly installed at the output end of the drive motor. The screw passes through the positioning disk and is threadedly connected to the lifting plate. Positioning blocks are symmetrically fixedly installed on the outer wall of the cylinder body. The inner wall of one of the positioning blocks is rotatably connected to the end of the screw away from the drive motor. A limit post is fixedly installed between the other positioning block and the inner wall of the positioning disk. The outer wall of the limit post is slidably connected to the inner wall of the lifting plate.

3. The hydraulic coupling cylinder piston locking device according to claim 2, characterized in that: The inner wall of the lock is slidably fitted with a clamping block A and a moving block A. An elastic element B is fixedly installed between the outer walls of the clamping block A and the moving block A. The inner wall of the lock is symmetrically fitted with a clamping block B and a moving block B. Correspondingly, an elastic element C is fixedly installed between the outer walls of the clamping block B and the moving block B.

4. The hydraulic coupling cylinder piston locking device according to claim 3, characterized in that: The lock has symmetrically fixed rotating shafts on its inner wall, and rotating plates are rotatably mounted on the outer walls of the rotating shafts. The outer walls of the rotating plates abut against the outer walls of the moving blocks A. Squeezing rollers are rotatably mounted on the ends of the two rotating plates that are far apart from each other, and the outer walls of the two squeezing rollers abut against the outer walls of the two moving blocks B respectively.

5. A hydraulic coupling cylinder piston locking device according to claim 4, characterized in that: A connecting plate is fixedly installed on the end of the extrusion plate near the hinge, and a cleaning box is provided on the end of the connecting plate away from the extrusion plate.

6. A hydraulic coupling cylinder piston locking device according to claim 5, characterized in that: The outer wall of the cleaning box is fixedly installed with connecting blocks. The two connecting blocks are respectively inserted into the inner wall of the connecting plate, and the two connecting blocks are fixed to the two connecting plates respectively by the positioning knobs.

7. A hydraulic coupling cylinder piston locking device according to claim 6, characterized in that: The inner wall of the cleaning box is detachably fitted with absorbent cotton, the top of the cleaning box is fixedly fitted with a box cover, the top of the cylinder body is fixedly fitted with a side plate, the two hinges are fixedly fitted to the inner wall of the side plate, and the top of the side plate is fixedly fitted with a top plate.

8. A hydraulic coupling cylinder piston locking device according to claim 7, characterized in that: A sliding plate is slidably installed on the inner wall of the limiting post. An elastic element D is fixedly installed between the sliding plate and the limiting post. An elastic telescopic shaft A and an elastic telescopic shaft B are fixedly installed at both ends of the sliding plate, respectively. The length of the elastic telescopic shaft A is greater than the length of the elastic telescopic shaft B. Two buttons are fixedly installed on the top of the positioning plate. The two buttons are located below the elastic telescopic shaft A and the elastic telescopic shaft B, respectively. One button abuts against the elastic telescopic shaft A, and the other button is in contact with the elastic telescopic shaft B. Two warning lights are fixedly installed on the outer wall of the positioning plate.

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