A marine cylinder locking mechanism and a locking method thereof

Abstract

This invention discloses a locking mechanism and method for a marine hydraulic cylinder, belonging to the technical field of marine hydraulic cylinders. The locking mechanism includes a hydraulic cylinder composed of a fixed part, a movable part, and a fixed seat. A supporting component and an adjusting component are provided at the telescopic end of the translational telescopic rod. Two clamping assemblies are provided, located on the translational telescopic rod and the fixed telescopic rod respectively. Two arc-shaped clamping plates slide on the fixed part, and the movable part is located between the two arc-shaped clamping plates. When the movable part of the hydraulic cylinder is subjected to an oblique force, a supporting force opposite to the oblique force is applied to the hydraulic cylinder, balancing the radial force. This prevents the piston and cylinder body from experiencing excessive radial force during the upward movement of the movable part. Simultaneously, the oblique force and supporting force clamp the top of the hydraulic cylinder, improving the self-locking effect and preventing the hydraulic cylinder from tilting.

Description

Technical Field

[0001] This invention relates to the technical field of marine hydraulic cylinders, specifically to a marine hydraulic cylinder locking mechanism and its locking method. Background Technology

[0002] Marine hydraulic cylinders are indispensable core components in the shipbuilding industry, widely used in steering gear systems, anchor winches, mooring winches, hatch opening and closing systems, and deck machinery. In steering gears, they precisely control the rudder blade angle, ensuring the ship's course stability in complex sea conditions. In anchor winches and mooring winches, they use powerful motors to raise and lower anchor chains and mooring lines, ensuring safe berthing. As linear reciprocating motion actuators that convert hydraulic energy into mechanical energy, they are simple in structure and highly reliable. They require no deceleration device during operation, simplifying the system, reducing costs, and achieving smooth movement due to the absence of transmission backlash, which is of great significance to the stability of ship equipment.

[0003] In practical operations, it is often necessary to keep the workpiece fixed in a specific position. At this time, the locking function of the hydraulic cylinder is crucial. Common locking methods include mechanical locking and hydraulic locking. Mechanical locking uses devices such as pins and blocks to restrict piston movement. Although the structure is simple and the locking force is strong, the operation is cumbersome and the parts are prone to wear. Hydraulic locking uses a hydraulically controlled check valve or a balance valve. The former achieves high-precision and rapid locking by preventing the backflow of hydraulic oil, but it has high requirements for sealing. The latter can provide back pressure for vertically mounted hydraulic cylinders, balance the load, and reliably lock the cylinder.

[0004] However, long-stroke hydraulic cylinders face challenges during operation. Due to the complexity of actual working conditions, the piston rod is susceptible to non-axial forces, leading to decreased cylinder stability, increased risk of tipping over, increased friction between the piston and cylinder, accelerated wear of the seals, hydraulic oil leakage, and a drop in system pressure.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing marine hydraulic cylinders. Summary of the Invention

[0006] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the present invention mainly provides a ship hydraulic cylinder locking mechanism and its locking method to solve the technical problems mentioned in the background.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A marine hydraulic cylinder locking mechanism includes a hydraulic cylinder comprising a fixed part, a movable part, and a fixed base, and further includes:

[0009] The docking seat is rotatably mounted at the top of the movable part;

[0010] The protective assembly includes a translational telescopic rod, a fixed telescopic rod, and a radial extension rod. The translational telescopic rod is slidably mounted on a fixed base, and the telescopic end of the translational telescopic rod is provided with a support component and an adjustment component.

[0011] The supporting component includes a slidingly connected sleeve rod and a movable plug rod, which are rotatably mounted on the upper end of the translational telescopic rod and the radial extension rod, respectively. The sleeve rod is connected to a force-applying component via a connecting pipe. The force-applying component generates a supporting force by squeezing the movable plug rod with oil, thereby distributing the pressure on the moving part. The adjusting component includes a meshing adjusting gear and an adjusting rack. The adjusting gear rotates synchronously with the docking seat, and the adjusting rack moves by pushing the translational telescopic rod, thereby making the supporting force of the supporting component and the pressure on the moving part parallel.

[0012] The clamping assembly is provided in two sets, located on the translational telescopic rod and the fixed telescopic rod respectively;

[0013] Two arc-shaped clamping plates slide on the fixed part, and the movable part is located between the two arc-shaped clamping plates. When the clamping assembly performs clamping operation, the two arc-shaped clamping plates move towards each other to clamp the movable part.

[0014] Preferably, the docking seat is provided with a plurality of bolts for connecting with external objects, the lower end of the fixed seat is provided with an ear for connecting with external objects, the upper end of the movable part is installed with a radial extension rod, and the upper end of the fixed telescopic rod is connected to the radial extension rod.

[0015] Preferably, the force-applying component includes a mounting box, inside which a compression cylinder and a drive motor are installed. The connecting pipe is connected to the compression cylinder, and a piston block slides inside the compression cylinder. A counterweight is provided at the upper end of the piston block. A winding disc is installed at the output end of the drive motor. The counterweight and the winding disc are connected by a pull rope. Oil is filled between the piston block and the moving piston rod through a connecting pipe.

[0016] Preferably, a force measuring component is provided on one side of the movable part and mounted on the fixed base. The force measuring component is a pressure sensor. A controller electrically connected to the pressure sensor and the drive motor is provided inside the mounting box. The larger the value detected by the pressure sensor, the smaller the traction force of the drive motor on the pull rope through the winding disc.

[0017] Preferably, the mounting housing is detachably mounted on the fixed base by bolts, and the piston block always maintains the weight of the counterweight block that transmits oil.

[0018] Preferably, the adjusting component includes a fixed box installed in the movable part, an adjusting gear is rotatably installed inside the fixed box, the adjusting gear and the rotating shaft of the docking seat are synchronously rotated through a chain and gears, the lower end of the adjusting gear is engaged with an adjusting rack that slides left and right, and one end of the adjusting rack is installed on the upper end of the translation telescopic rod.

[0019] Preferably, the clamping assembly includes a side plate mounted on the fixed end of the translational telescopic rod or the fixed telescopic rod. A lifting rack slides on the side plate, and drive gears mesh on both sides of the lifting rack. Each drive gear is equipped with a gripper. The drive gears also mesh with a sliding rack slidably mounted on the side plate. The sliding rack and the lifting rack slide in perpendicular directions. The sliding rack is connected to a meshing rack via a connecting rod. An electric push rod is connected to the lower end of the lifting rack. When the two grippers clamp the moving end of the translational telescopic rod or the fixed telescopic rod, the meshing rack and the lifting rack engage.

[0020] Preferably, the arc-shaped clamping plate on one side of the movable part and the clamping hand on the other side of the movable part are connected by a rope, and the clamping hand is located between the movable part and the translating telescopic rod or the fixed telescopic rod. When the two clamping hands clamp the moving end of the translating telescopic rod or the fixed telescopic rod, the two arc-shaped clamping plates clamp the movable part.

[0021] A locking method for a marine hydraulic cylinder locking mechanism includes the following steps:

[0022] S1. The hydraulic cylinder is installed through the lug, and then the hydraulic cylinder connects the object to be forceped through the docking seat. The docking seat is deflected in the direction away from the moving rod of the movable part.

[0023] S2. The oil pump achieves the lifting and lowering of the moving part by injecting and pumping oil into the fixed part;

[0024] S3. During the upward movement of the moving part, the docking seat deflects, and the force-applying component forms a supporting force on the moving part by squeezing the moving plug rod with oil.

[0025] S4. Set a threshold for the pressure sensor. When the pressure sensor detects a value that exceeds the threshold, continuously reduce the traction force of the drive motor on the pull rope through the winding disc, that is, change the support force of the moving stopper on the moving part to ensure that the pressure sensor detects a value within the threshold.

[0026] S5. When the hydraulic cylinder reaches the predetermined stroke, the clamping assembly fixes the movable end of the translational telescopic rod and the fixed telescopic rod. The supporting force of the moving plug on the movable part, together with the pressure of the external object, forms a clamp on the top of the hydraulic cylinder. The two arc-shaped clamping plates move relative to each other to clamp the movable part.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] (1) When the docking seat deflects, that is, when the hydraulic cylinder is subjected to oblique force, at this time, under the drive of the gear and the chain belt, the adjusting gear rotates synchronously with the docking seat, the adjusting gear drives the adjusting rack to move, the adjusting rack drives the translation telescopic rod to move, so that the sleeve rod and the moving plug rod deflect, so that the sleeve rod and the moving plug rod are perpendicular to the docking seat. As the value detected by the pressure sensor increases, the driving motor generates less traction force on the pull rope by driving the winding disc to rotate, so that the counterweight generates greater force on the oil. The moving plug rod will have oblique support force on the radial extension rod, and the direction of this support force is opposite to that of the oblique pressure, so as to balance the radial force received by the moving part.

[0029] In summary, the present invention, through the provision of a protective component, applies a supporting force opposite to the oblique force to the hydraulic cylinder when the moving part of the hydraulic cylinder is subjected to an oblique force, thereby balancing the radial force. This prevents the moving part from experiencing excessive radial force during its ascent, which would increase the friction between the piston and the cylinder body, improve the performance of the hydraulic cylinder, and avoid wear on the outer seal of the piston, which could lead to hydraulic cylinder failure.

[0030] (2) When the hydraulic cylinder is locked, the electric push rod is started, which drives the lifting rack to move down, causing the drive gear to rotate. The drive grippers cooperate to clamp the movable end of the translation telescopic rod or the fixed telescopic rod. The support component adjusts the magnitude of the support force according to the magnitude of the radial force. The adjustment component always keeps the support force and the pressure on the hydraulic cylinder relative.

[0031] In summary, the present invention, through the provision of protective and clamping components, achieves a clamping effect on the top of the hydraulic cylinder after the clamping components are fixed. This is because the supporting force and the oblique force are directly opposite, and the greater the oblique force and the more skewed the angle, the greater the supporting force. Therefore, it ensures a good locking effect at the top, solves the problem that the top of the hydraulic cylinder is prone to tilting when subjected to oblique force after a long extension stroke, enhances the overall radial force bearing capacity of the hydraulic cylinder, and improves the working reliability and service life of the hydraulic cylinder.

[0032] (3) When the hydraulic cylinder is locked, the electric push rod is started, which drives the lifting rack to move down, causing the drive gear to rotate. This drives the clamping hands to cooperate with each other to clamp the movable end of the translational telescopic rod or the fixed telescopic rod, thereby fixing the translational telescopic rod and the fixed telescopic rod. When the drive gear rotates, it also drives the sliding rack to move, so that the meshing rack and the lifting rack are engaged, realizing the self-locking of the clamping assembly. At the same time, the movement of the clamping hands will also drive the two arc-shaped clamps to move relative to each other, clamping the movable part.

[0033] In summary, this invention, through the clamping assembly and arc-shaped clamping plates, reduces the locking effect of the hydraulic cylinder when it is not subjected to oblique force or a large oblique force, due to the pressure exerted on the hydraulic cylinder by an external object combined with the supporting force of the moving piston rod. At this time, the relative movement of the two arc-shaped clamping plates clamps the moving part, thus providing the most basic locking effect for the hydraulic cylinder. At the same time, the self-locking of the clamping assembly ensures the locking effect provided by the hydraulic cylinder.

[0034] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the hydraulic cylinder of the present invention;

[0036] Figure 2 This is a schematic diagram of the upper part of the hydraulic cylinder of the present invention;

[0037] Figure 3 This is a schematic diagram showing the connection between the sleeve rod and the movable plug rod of the present invention;

[0038] Figure 4 This is a schematic diagram of the force-applying component of the present invention;

[0039] Figure 5 For the present invention Figure 1 Enlarged view of point A in the middle;

[0040] Figure 6 This is a schematic diagram of the clamping assembly structure of the present invention;

[0041] Figure 7 This is a schematic diagram of the arc-shaped clamping plate structure of the present invention.

[0042] Figure Descriptions: 1. Hydraulic cylinder; 11. Fixed part; 12. Moving part; 13. Fixed seat; 14. Arc-shaped clamp; 15. Rope; 2. Docking seat; 3. Protective assembly; 31. Translational telescopic rod; 32. Fixed telescopic rod; 33. Radial extension rod; 34. Support component; 340. Connecting pipe; 341. Sleeve rod; 342. Moving stopper rod; 343. Mounting box; 344. Extrusion cylinder; 345. Drive motor; 346. Piston block; 347. Counterweight block; 348. Winding disc; 349. Pull rope; 35. Adjusting component; 351. Fixed box; 352. Adjusting gear; 353. Adjusting rack; 4. Clamping assembly; 41. Side plate; 42. Lifting rack; 43. Drive gear; 44. Clamping hand; 45. Sliding rack; 46. Engaging rack; 47. Electric push rod. Detailed Implementation

[0043] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] Example 1: Please refer to the attached diagram. Figure 1 A ship hydraulic cylinder locking mechanism includes a hydraulic cylinder 1 consisting of a fixed part 11, a movable part 12, and a fixed base 13. The fixed part 11 is the frame of the hydraulic cylinder 1 and the oil reservoir of the hydraulic cylinder 1. The movable part 12 is the piston rod of the hydraulic cylinder 1.

[0047] Please refer to the attached diagram. Figure 1 and 2 The docking seat 2 is rotatably mounted on the top of the movable part 12. The docking seat 2 is provided with several bolts for connecting with external objects. The lower end of the fixed seat 13 is provided with ear seats for connecting with external objects. The design of the bolts and ear seats makes the hydraulic cylinder 1 easier to install.

[0048] Please see the appendix Figure 1-4 The protective assembly 3 includes a translational telescopic rod 31, a fixed telescopic rod 32, and a radial extension rod 33. The translational telescopic rod 31 is slidably mounted on the fixed base 13. The telescopic end of the translational telescopic rod 31 is provided with a support component 34 and an adjustment component 35. The radial extension rod 33 is installed on the upper end of the movable part 12. The upper end of the fixed telescopic rod 32 is connected to the radial extension rod 33. The clamping assembly 4 has two sets, which are located on the translational telescopic rod 31 and the fixed telescopic rod 32 respectively.

[0049] The support component 34 includes a slidingly connected sleeve rod 341 and a movable stopper rod 342. The sleeve rod 341 and the movable stopper rod 342 are rotatably mounted on the upper end of the translational telescopic rod 31 and the radial extension rod 33, respectively. The sleeve rod 341 is connected to a force-applying component through a connecting pipe 340. The force-applying component forms a supporting force by squeezing the movable stopper rod 342 with oil, thereby distributing the pressure on the movable part 12. The force-applying component includes a mounting box 343. The mounting box 343 is equipped with a squeezing cylinder 344 and a drive motor 345. The connecting pipe 340 is connected to the squeezing cylinder 344. A piston block 346 slides inside the squeezing cylinder 344. A counterweight block 347 is provided at the upper end of the piston block 346. A coiling disc 348 is installed at the output end of the drive motor 345. The counterweight block 347 and the coiling disc 348 are connected by a pull rope 349. Oil is filled between the piston block 346 and the movable stopper rod 342 through the connecting pipe 340. When no oblique force is generated or when the hydraulic cylinder 1 retracts, the drive motor 345 drives the winding disc 348 to rotate, generating a traction force on the pull rope 349, causing the pull rope 349 to lift the counterweight 347. The counterweight 347 does not exert a force on the hydraulic fluid, thus preventing the moving stopper rod 342 from exerting an upward force on the radial extension rod 33. However, when an oblique force is generated, as the radial force increases, the traction force generated by the drive motor 345 driving the winding disc 348 to rotate on the pull rope 349 decreases, resulting in a greater force exerted by the counterweight 347 on the hydraulic fluid. This causes the moving stopper rod 342 to exert an oblique supporting force on the radial extension rod 33, ensuring the stable rise of the movable part 12.

[0050] A force-measuring component, a pressure sensor, is mounted on a fixed base 13 on one side of the active section 12. A controller electrically connected to the pressure sensor and drive motor 345 is located inside the mounting housing 343. The higher the pressure sensor reading, the lower the traction force exerted by the drive motor 345 on the pull rope 349 via the winding disc 348. A threshold is set for the pressure sensor; when the detected value exceeds the threshold, the traction force exerted by the drive motor 345 on the pull rope 349 via the winding disc 348 is continuously reduced to ensure that the pressure sensor reading remains within the threshold.

[0051] The mounting housing 343 is detachably mounted on the fixed base 13 by bolts, and the piston block 346 always transmits the weight of the counterweight 347 to the hydraulic fluid. The mounting housing 343 is detachable. In actual use, due to special circumstances, the hydraulic cylinder 1 needs to be placed horizontally. If the mounting housing 343 is also placed horizontally, the weight of the counterweight 347 will not be able to act on the hydraulic fluid. Therefore, the installation position of the mounting housing 343 can be changed to ensure that the weight of the counterweight 347 always acts on the hydraulic fluid.

[0052] The adjusting component 35 includes an adjusting gear 352 and an adjusting rack 353 that mesh with each other. The adjusting gear 352 rotates synchronously with the docking seat 2, and the adjusting rack 353 moves by pushing the translation telescopic rod 31, thereby making the supporting force of the supporting component 34 and the pressure on the movable part 12 parallel. The adjusting component 35 includes a fixed box 351 installed in the movable part 12. The adjusting gear 352 is rotatably installed inside the fixed box 351. The adjusting gear 352 and the rotating axis of the docking seat 2 rotate synchronously through a chain and gears. The lower end of the adjusting gear 352 meshes with the left-right sliding adjusting rack 353, and one end of the adjusting rack 353 is installed on the upper end of the translation telescopic rod 31. An external object exerts an oblique force on the hydraulic cylinder 1, causing the docking seat 2 to rotate. At this time, driven by the gears and chain, the adjusting gear 352 rotates synchronously with the docking seat 2. The adjusting gear 352 drives the adjusting rack 353 to move, which in turn drives the translational telescopic rod 31 to move. This causes the sleeve rod 341 and the moving plug rod 342 to deflect, making them perpendicular to the docking seat 2, thus ensuring good support. Meanwhile, after the clamping assembly 4 is fixed, the supporting force and the oblique force are directly opposite, forming a clamping effect on the top of the hydraulic cylinder 1. The greater the oblique force and the greater the angle of deviation, the greater the supporting force. Therefore, a good locking effect at the top is ensured, solving the problem that the top of the hydraulic cylinder 1 is prone to tilting when subjected to oblique force after a long extension stroke. This enhances the overall radial force resistance of the hydraulic cylinder 1 and improves its operational reliability and service life.

[0053] Pressure and temperature sensors are installed in the connecting pipe 340 to monitor the oil status in real time. An oil storage tank and a filter device are added so that when the oil volume changes due to leakage or temperature change, the oil is automatically replenished or recovered to maintain system stability.

[0054] Key components such as the arc-shaped clamping plate 14 and the clamping hand 44 are made of stainless steel (such as 316L) or have an anti-corrosion coating (such as polyurea elastomer) sprayed on the surface. Self-lubricating materials (such as copper alloy bushings inlaid with graphite) are used at the sliding interface between the moving plug rod 342 and the sleeve rod 341 to reduce wear and reduce maintenance frequency. Serrated anti-slip textures are provided on the contact surface between the clamping hand 44 and the telescopic rod to improve friction.

[0055] Example 2: Based on Example 1, please refer to the attached drawings. Figure 5-7The clamping assembly 4 has two sets, located on the translational telescopic rod 31 and the fixed telescopic rod 32 respectively. The clamping assembly 4 includes a side plate 41 installed on the fixed end of the translational telescopic rod 31 or the fixed telescopic rod 32. A lifting rack 42 slides on the side plate 41. Drive gears 43 are respectively engaged on both sides of the lifting rack 42. A clamping hand 44 is installed on each drive gear 43. The drive gear 43 also engages a sliding rack 45 that is slidably installed on the side plate 41. The sliding rack 45 and the lifting rack 42 slide in the same direction. The sliding rack 45 is connected to a meshing rack 46 through a connecting rod. An electric push rod 47 is connected to the lower end of the lifting rack 42. When the two clamping hands 44 clamp the moving end of the translational telescopic rod 31 or the fixed telescopic rod 32, the meshing rack 46 and the lifting rack 42 engage. When the hydraulic cylinder 1 extends, since the translational telescopic rod 31 and the fixed telescopic rod 32 can freely extend and shorten, even if the supporting force and the oblique force are opposite, the hydraulic cylinder 1 can still extend normally due to the clamping effect. When the movable part 12 of the hydraulic cylinder 1 is fixed, the electric push rod 47 is activated, which drives the lifting rack 42 to move down, causing the drive gear 43 to rotate. This drives the clamping hand 44 to cooperate with each other to clamp the movable end of the translational telescopic rod 31 or the fixed telescopic rod 32, thereby fixing the translational telescopic rod 31 and the fixed telescopic rod 32 and preventing the movable part 12 of the hydraulic cylinder 1 from moving. Furthermore, when the drive gear 43 rotates, it also drives the sliding rack 45 to move, causing the meshing rack 46 and the lifting rack 42 to engage, achieving self-locking of the clamping component 4, further ensuring the clamping effect, and thus improving the locking effect of the movable part 12 of the hydraulic cylinder 1.

[0056] Two arc-shaped clamping plates 14 slide on the fixed part 11, and the movable part 12 is located between the two arc-shaped clamping plates 14. When the clamping assembly 4 performs clamping operations, the two arc-shaped clamping plates 14 move towards each other to clamp the movable part 12. The arc-shaped clamping plate 14 located on one side of the movable part 12 and the clamping hand 44 located on the other side of the movable part 12 are connected by a rope 15, and the clamping hand 44 is located between the movable part 12 and the translating telescopic rod 31 or the fixed telescopic rod 32. When the two clamping hands 44 clamp the moving end of the translating telescopic rod 31 or the fixed telescopic rod 32, the two arc-shaped clamping plates 14 clamp the movable part 12. When the clamping hand 44 clamps the translating telescopic rod 31 or the fixed telescopic rod 32, the clamping hand 44 will drive the two arc-shaped clamping plates 14 to move relative to each other through the rope 15, thereby clamping the movable part 12 and locking the hydraulic cylinder 1. When the hydraulic cylinder 1 is not subjected to a diagonal force or a large diagonal force, the locking effect formed by the pressure exerted on the hydraulic cylinder 1 by an external object and the supporting force of the moving piston rod 342 will decrease. At this time, the relative movement of the two arc-shaped clamping plates 14 clamps the movable part 12, thus providing the most basic locking effect for the hydraulic cylinder 1.

[0057] A locking method for a marine hydraulic cylinder locking mechanism includes the following steps:

[0058] S1. The hydraulic cylinder 1 is installed through the lug, and then the hydraulic cylinder 1 connects the object to be forceped through the docking seat 2. The deflection direction of the docking seat 2 is located on the side of the movable part 12 away from the moving plug rod 342.

[0059] S2. The oil pump raises and lowers the movable part 12 by injecting and pumping oil into the fixed part 11.

[0060] S3. During the upward movement of the movable part 12, the docking seat 2 deflects, and the force-applying component forms a supporting force on the movable part 12 by squeezing the moving plug rod 342 through the oil.

[0061] S4. Set a threshold for the pressure sensor. When the value detected by the pressure sensor exceeds the threshold, continuously reduce the traction force of the drive motor 345 on the pull rope 349 through the winding disc 348, that is, change the support force of the moving stopper 342 on the moving part 12 to ensure that the value detected by the pressure sensor is within the threshold.

[0062] S5. When the hydraulic cylinder 1 reaches the predetermined stroke, the clamping assembly 4 fixes the movable ends of the translational telescopic rod 31 and the fixed telescopic rod 32. The supporting force of the moving plug rod 342 on the movable part 12, together with the pressure of the external object, forms a clamping on the top of the hydraulic cylinder 1. The two arc-shaped clamping plates 14 move relative to each other to clamp the movable part 12.

[0063] Detailed operation steps:

[0064] The hydraulic cylinder 1 is installed via the lug, and then an external object is installed on the docking seat 2. When the hydraulic cylinder 1 extends, the movable part 12 moves outward, the radial extension rod 33 moves accordingly, and the translational telescopic rod 31 and the fixed telescopic rod 32 extend synchronously. During the extension, due to external factors, the external object may exert an oblique force on the hydraulic cylinder 1, causing the docking seat 2 to rotate. At this time, driven by the gear and chain, the adjusting gear 352 rotates synchronously with the docking seat 2. The adjusting gear 352 drives the adjusting rack 353 to move, and the adjusting rack 353 drives the translational telescopic rod 31 to move, causing the sleeve rod 341 and the moving plug rod 342 to deflect, making the sleeve rod 341 and the moving plug rod 342 perpendicular to the docking seat 2. When no oblique force is generated or when the hydraulic cylinder 1 retracts, the drive motor 345 drives the winding disc 348 to rotate, generating a pull on the rope 349. Gravity causes the pull rope 349 to lift the counterweight 347. The counterweight 347 does not exert force on the oil, so the moving piston rod 342 does not exert an upward force on the radial extension rod 33. When an oblique force is generated, as the value detected by the pressure sensor increases, the drive motor 345 generates less traction force on the pull rope 349 by driving the winding disc 348 to rotate. This results in a greater force exerted by the counterweight 347 on the oil, and the moving piston rod 342 will have an oblique support force on the radial extension rod 33. This support force and the oblique pressure are opposite, balancing the radial force received by the moving part 12. This prevents the moving part 12 from being subjected to excessive radial force during its ascent, which would increase the friction between the piston and the cylinder, improve the performance of the hydraulic cylinder 1, and avoid wear on the outer seal of the piston, which could lead to failure of the hydraulic cylinder 1.

[0065] When the hydraulic cylinder 1 is locked, the electric push rod 47 is activated, causing the lifting rack 42 to move downwards, which in turn causes the drive gear 43 to rotate. This drives the clamping hand 44 to cooperate in clamping the movable end of the translational telescopic rod 31 or the fixed telescopic rod 32, thereby fixing the translational telescopic rod 31 and the fixed telescopic rod 32. Furthermore, when the drive gear 43 rotates, it also drives the sliding rack 45 to move, causing the meshing rack 46 to engage with the lifting rack 42, achieving self-locking of the clamping assembly 4. Because the supporting force and the oblique force are directly opposite, they form a clamping effect on the top of the hydraulic cylinder 1. The greater the oblique force and the more skewed the angle, the stronger the support. The greater the force, the better the locking effect at the top, thus solving the problem that the top of the hydraulic cylinder 1 is prone to tilting when subjected to oblique force after a long extension stroke. This enhances the overall ability of the hydraulic cylinder 1 to withstand radial force and improves the working reliability and service life of the hydraulic cylinder 1. When the hydraulic cylinder 1 is not subjected to oblique force or a large oblique force, the locking effect formed by the pressure exerted on the hydraulic cylinder 1 by external objects and the supporting force of the moving plug rod 342 will decrease. At this time, the relative movement of the two arc-shaped clamps 14 clamps the movable part 12, thus providing the most basic locking effect for the hydraulic cylinder 1.

[0066] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A marine hydraulic cylinder locking mechanism, comprising a hydraulic cylinder (1) consisting of a fixed part (11), a movable part (12), and a fixed base (13), characterized in that, Also includes: The docking seat (2) is rotatably mounted on the top of the movable part (12); The protective assembly (3) includes a translational telescopic rod (31), a fixed telescopic rod (32) and a radial extension rod (33). The translational telescopic rod (31) is slidably mounted on the fixed base (13). The telescopic end of the translational telescopic rod (31) is provided with a support component (34) and an adjustment component (35). The supporting component (34) includes a slidingly connected sleeve rod (341) and a movable plug rod (342). The sleeve rod (341) and the movable plug rod (342) are respectively rotatably mounted on the upper end of the translational telescopic rod (31) and the radial extension rod (33). The sleeve rod (341) is connected to a force-applying component through a connecting pipe (340). The force-applying component forms a supporting force by squeezing the movable plug rod (342) with oil, thereby distributing the pressure on the moving part (12). The adjusting component (35) includes a meshing adjusting gear (352) and an adjusting rack (353). The adjusting gear (352) rotates synchronously with the docking seat (2). The adjusting rack (353) moves by pushing the translational telescopic rod (31), thereby making the supporting force of the supporting component (34) and the pressure on the moving part (12) parallel. The clamping assembly (4) is provided in two sets and is located on the translation telescopic rod (31) and the fixed telescopic rod (32) respectively; Two arc-shaped clamps (14) slide on the fixed part (11), and the movable part (12) is located between the two arc-shaped clamps (14). When the clamping assembly (4) performs clamping operation, the two arc-shaped clamps (14) move towards each other to clamp the movable part (12).

2. The marine hydraulic cylinder locking mechanism according to claim 1, characterized in that, The docking seat (2) is provided with several bolts for connecting with external objects. The lower end of the fixed seat (13) is provided with an ear for connecting with external objects. The upper end of the movable part (12) is equipped with a radial extension rod (33). The upper end of the fixed telescopic rod (32) is connected to the radial extension rod (33).

3. A marine hydraulic cylinder locking mechanism according to claim 2, characterized in that, The force-applying component includes a mounting box (343), inside which is installed a compression cylinder (344) and a drive motor (345). A connecting pipe (340) is connected to the compression cylinder (344), and a piston block (346) slides inside the compression cylinder (344). A winding disc (348) is installed at the output end of the drive motor (345). Oil is filled between the piston block (346) and the moving piston rod (342) through the connecting pipe (340).

4. A marine hydraulic cylinder locking mechanism according to claim 3, characterized in that, The active part (12) is provided with a force measuring component installed on the fixed base (13) on one side. The force measuring component is a pressure sensor. The mounting box (343) is provided with a controller that is electrically connected to the pressure sensor and the drive motor (345). The larger the value detected by the pressure sensor, the smaller the traction force of the drive motor (345) on the pull rope (349) through the winding disc (348).

5. A marine hydraulic cylinder locking mechanism according to claim 4, characterized in that, The adjusting component (35) includes a fixed box (351) installed in the movable part (12). An adjusting gear (352) is rotatably installed inside the fixed box (351). The adjusting gear (352) and the rotating axis of the docking seat (2) are synchronously rotated through a chain and a gear. The lower end of the adjusting gear (352) is engaged with an adjusting rack (353) that slides left and right. One end of the adjusting rack (353) is installed on the upper end of the translation telescopic rod (31).

6. A marine hydraulic cylinder locking mechanism according to claim 5, characterized in that, The clamping assembly (4) includes a side plate (41) installed on the fixed end of the translation telescopic rod (31) or the fixed telescopic rod (32). A lifting rack (42) slides on the side plate (41). A drive gear (43) meshes on both sides of the lifting rack (42). A clamping hand (44) is installed on each of the drive gears (43). The drive gear (43) also meshes with a sliding rack (45) that slides on the side plate (41). The sliding rack (45) and the lifting rack (42) slide in perpendicular directions. The sliding rack (45) is connected to a biting rack (46) via a connecting rod. An electric push rod (47) is connected to the lower end of the lifting rack (42). When the two clamping hands (44) clamp the moving end of the translation telescopic rod (31) or the fixed telescopic rod (32), the biting rack (46) and the lifting rack (42) engage.

7. A marine hydraulic cylinder locking mechanism according to claim 6, characterized in that, The arc-shaped clamping plate (14) on one side of the movable part (12) and the clamping hand (44) on the other side of the movable part (12) are connected by a rope (15). The clamping hand (44) is located between the movable part (12) and the translating telescopic rod (31) or the fixed telescopic rod (32). When the two clamping hands (44) clamp the moving end of the translating telescopic rod (31) or the fixed telescopic rod (32), the two arc-shaped clamping plates (14) clamp the movable part (12).

8. A locking method for a marine hydraulic cylinder locking mechanism, characterized in that: The method applied to the marine hydraulic cylinder locking mechanism of claim 7 includes the following steps: S1. The hydraulic cylinder (1) is installed through the lug, and then the hydraulic cylinder (1) connects the object to be forceped through the docking seat (2). The docking seat (2) is deflected in the direction of the moving part (12) away from the moving piston rod (342). S2. The oil pump raises and lowers the movable part (12) by injecting and pumping oil into the fixed part (11); S3. During the upward movement of the movable part (12), the docking seat (2) deflects, and the force-applying component forms a supporting force on the movable part (12) by squeezing the moving plug rod (342) with oil. S4. Set a threshold for the pressure sensor. When the value detected by the pressure sensor exceeds the threshold, continuously reduce the traction force of the drive motor (345) on the pull rope (349) through the winding disc (348), that is, change the support force of the moving rod (342) on the moving part (12) to ensure that the value detected by the pressure sensor is within the threshold. S5. When the hydraulic cylinder (1) reaches the predetermined stroke, the clamping assembly (4) fixes the movable ends of the translation telescopic rod (31) and the fixed telescopic rod (32). The supporting force of the moving plug rod (342) on the movable part (12) and the pressure of the external object form a clamping on the top of the hydraulic cylinder (1). The two arc-shaped clamping plates (14) move relative to each other to clamp the movable part (12).

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