A pneumatic self-locking quick connecting device for a ship rudder blade

Abstract

The application discloses a kind of quick connecting device of air pressure self-locking of ship rudder blade, it is related to rudder blade assembly technical field, including the rudder knob hole being opened on ship body, and the rudder pin being fixedly arranged on rudder blade and being inserted with the rudder knob hole cooperation, further include: the annular groove being opened in the upper and lower ends of the rudder knob hole;Centering guide mechanism is arranged in annular groove;Probe rod assembly is rotationally arranged in two annular grooves respectively.The quick connecting device of air pressure self-locking of ship rudder blade inserts centering guide mechanism and probe rod assembly in the inner wall of rudder knob hole by annular groove, does not occupy effective space.Cylinder, piston, air hole constitute active air extraction structure, eliminate the air cushion resistance generated by hot mounting.The upper probe rod is slidably connected with transmission rod, and the centering is completed synchronously when the rudder pin rises.Linkage block is linked with centripetal chuck, and is automatically locked after reaching position, realizes the assembly of centering and locking.

Description

Technical Field

[0001] This invention relates to the field of rudder blade assembly technology, and more specifically to a pneumatic self-locking quick-connect device for ship rudder blades. Background Technology

[0002] The rudder blade is a key component for controlling a ship's course, and the accuracy and reliability of its connection to the hull directly affect navigation safety. Traditional rudder blade connection methods mainly use hydraulic nut locking or bolt fastening structures. Hydraulic nut locking requires an external hydraulic station, and operators must complete the connection and disconnection of high-pressure oil pipes in a confined space, which is a complex process and carries the risk of hydraulic oil leakage. Bolt fastening requires multiple people to work together, manually tightening multiple large bolts, which is labor-intensive, has low assembly efficiency, and makes it difficult to ensure the consistency of the preload of each bolt.

[0003] The Chinese patent CN116588277A discloses a rudder blade hoisting and centering fixture and method, comprising: a hoisting support frame having a receiving cavity and multiple lifting brackets, the circumferential wall of the receiving cavity having an open surface; a bottom platform set at the bottom of the receiving cavity, and a sliding platform set on the bottom platform; a construction operation platform set above the circumferential wall of the receiving cavity to form an installation cavity with the receiving cavity and the sliding platform, and an upper and lower ladder for connecting to the ground set on the construction operation platform; multiple adjusting components, including a vertical adjusting component for adjusting the height of the bottom platform from the ground, a longitudinal adjusting component for adjusting the longitudinal movement of the sliding platform, and a lateral adjusting component for adjusting the lateral movement of the sliding platform; and a fixing clamping device having a clamping cavity for easy horizontal insertion of the rudder blade, and the fixing clamping device can be inserted from the open surface and housed in the installation cavity.

[0004] In the aforementioned patents, an external power source or manual intervention is required, and the sliding platform needs to be adjusted before the rudder pin position can be adjusted. It is difficult to achieve automatic centering and locking as the rudder pin is inserted. In addition, the rudder pin and the rudder button hole have a tapered fit. If there is any misalignment during assembly, jamming or surface scratches may occur. Furthermore, during the hot assembly process, the gas inside the rudder button hole expands due to heat, forming an air cushion effect, which further increases the assembly resistance. Summary of the Invention

[0005] The purpose of this invention is to provide a pneumatic self-locking quick-connect device for ship rudder blades to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pneumatic self-locking quick-connect device for a ship's rudder blade, comprising a rudder knob hole formed on the hull, and a rudder pin fixedly disposed on the rudder blade and inserted into the rudder knob hole, further comprising: Annular grooves are formed at the upper and lower ends of the rudder knob hole; The centering guide mechanism is provided in the annular groove. The centering guide mechanism includes a cylinder, a piston slidably disposed in the cylinder, and a transmission rod that slides axially along the rudder button hole. The rodless chamber of the cylinder is connected to the inner wall of the rudder button hole through an air hole, and a one-way valve is provided at the air inlet of the rodless chamber. The probe rod assemblies, which are respectively installed in the two annular grooves, are rotated. The probe rod assembly includes an upper probe rod and a lower probe rod. The upper probe rod is slidably engaged with the upper transmission rod so as to drive the transmission rod to slide upward when the upper probe rod rotates upward. The locking assembly includes a linkage block linked to the transmission rod and a radial chuck driven by the linkage block. During the upward rotation of the rudder pin by pushing the upper probe rod, the centering guide mechanism draws gas from the rudder knob hole through the sliding of the piston and drives the upper probe rod to center the rudder pin. After the upper probe rod is pushed to the predetermined position, the locking assembly drives the centripetal chuck to move centripetally to form a blocking lock.

[0007] Preferably, the probe assembly further includes a pressure-holding roller for pressing against the rudder pin, the pressure-holding roller comprising a plurality of chambers filled with hydraulic oil.

[0008] Preferably, it also includes a flow channel connecting the upper and lower pressure-holding rollers and allowing the hydraulic oil to flow in one direction, wherein the inner diameter of the flow channel decreases in a stepped manner from top to bottom.

[0009] Preferably, a flexible rubber component is also included, which is connected to one side of the plurality of transmission rods facing the inner wall of the rudder pin hole. The flexible rubber component has a hollow structure inside and a liquid outlet hole is provided on the side facing the rudder pin.

[0010] Preferably, the upper and lower end faces of the flexible rubber component are serrated to achieve radial folding. It has a vertical partition and a movable diaphragm inside. The movable diaphragm divides the inner cavity of the flexible rubber component into an outlet cavity and a storage cavity. The outlet hole is opened on the outlet cavity, and the movable diaphragm has holes that are staggered. When the flexible rubber component is compressed, the holes are aligned to increase the flow diameter.

[0011] Preferably, the rudder knob hole is provided with an inlet, the side wall of the inlet is provided with an opening, and the flexible rubber part is provided with a connecting hole; When the transmission rod drives the flexible rubber component to a high position, the connecting hole connects with the opening.

[0012] Preferably, the upper probe rod is slidably engaged with the upper transmission rod via a first slider. The first slider is slidably disposed in the radial groove of the upper probe rod and is slidably engaged with the limiting rail on the transmission rod. The lower probe is slidably engaged with the limiting rail on the transmission rod below via a fixedly installed second slider.

[0013] Preferably, the centering guide mechanism further includes a folding stop disposed above the annular groove.

[0014] Preferably, the pressure-holding roller includes a shaft, an outer circumference, and an arc-shaped elastic element connecting the two.

[0015] Preferably, the locking component further includes a second elastic element disposed on the linkage block, the second elastic element being used to hold the linkage block in a low position.

[0016] In the above technical solution, the pneumatic self-locking quick-connect device for a ship's rudder blade provided by the present invention has the following beneficial effects: the centering guide mechanism and the probe assembly are embedded in the inner wall of the rudder pin hole through the annular groove, without occupying effective space. The cylinder, piston, and air hole constitute an active air extraction structure, eliminating the air cushion resistance generated by heat assembly. The upper probe rod slides with the transmission rod, and centering is completed synchronously when the rudder pin rises. The linkage block is linked with the radial chuck, and automatically locks after reaching the position, realizing the assembly of centering and locking. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is an overall three-dimensional schematic diagram provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the rudder knob hole provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the locking component structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the centering and guiding mechanism provided in an embodiment of the present invention; Figure 5 Provided for embodiments of the present invention Figure 4 Schematic diagram of the enlarged structure of A in the middle; Figure 6 This is a schematic diagram of the upper and lower probe structures provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the flow channel structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the movement process of the upper probe provided in an embodiment of the present invention; Figure 9This is a schematic diagram of the movement process of the lower probe rod provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Rudder button hole; 2. Rudder pin; 3. Flip plate; 4. Centering guide mechanism; 41. Annular groove; 42. Cylinder; 422. Air port; 423. One-way valve; 43. Piston; 44. First elastic element; 45. Transmission rod; 451. Limiting rail; 46. Circular ring structure; 5. Probe assembly; 51. Upper probe rod; 511. First slider; 512. Radial groove; 52. Lower probe rod; 521. Second slider; 53. Pressure holding roller; 531. Shaft; 532. Outer circumference; 533. Arc-shaped elastic element. Components; 534, Chamber; 538, Tooth; 6, Locking assembly; 61, Linkage block; 62, Radial chuck; 63, Second elastic component; 7, Flow channel; 71, Oil inlet; 72, Oil outlet; 8, Flexible rubber component; 81, Arc groove; 82, Hollow structure; 83, Serrated end face; 84, Vertical partition; 85, Liquid outlet chamber; 86, Liquid outlet hole; 87, Movable diaphragm; 871, Diaphragm; 872, Hole; 88, Connecting hole; 9, Inlet; 91, Opening; 10, Folding stop. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-9 As shown, a pneumatic self-locking quick-connect device for a ship's rudder blade includes a rudder knob hole 1 opened on the hull, and a rudder pin 2 fixedly mounted on the rudder blade and inserted into the rudder knob hole 1, and further includes: Annular grooves 41 are formed at the upper and lower ends of the rudder knob hole 1; The centering guide mechanism 4 is provided in the annular groove 41. The centering guide mechanism 4 includes a cylinder 42, a piston 43 slidably provided in the cylinder 42, and a transmission rod 45 slidably along the rudder button hole 1. The rodless chamber of the cylinder 42 is connected to the inner wall of the rudder button hole 1 through the air hole 422, and the air inlet of the rodless chamber is provided with a one-way valve 423. The probe rod assembly 5, which is set in the two annular grooves 41, is rotated respectively. The probe rod assembly 5 includes an upper probe rod 51 and a lower probe rod 52. The upper probe rod 51 is slidably engaged with the upper transmission rod 45 so as to drive the transmission rod 45 to slide upward when the upper probe rod 51 rotates upward. The locking assembly 6 includes a linkage block 61 that is linked to the transmission rod 45, and a radial chuck 62 that is driven by the linkage block 61. During the process of the rudder pin 2 pushing the upper probe rod 51 to rotate upward, the centering guide mechanism 4 draws gas from the rudder button hole 1 through the sliding of the piston 43 and drives the upper probe rod 51 to center the rudder pin 2. After the upper probe rod 51 is pushed to the predetermined position, the locking component 6 drives the centripetal chuck 62 to move centripetally to form a blocking lock.

[0022] Specifically, the rudder knob hole 1 is designed as a tapered structure, narrow at the top and wide at the bottom. This structural feature is existing technology and will not be described in detail here. Multiple flaps 3 are hinged to the outer wall of the end of the rudder pin 2, and a stop is provided on the hinge shaft to limit the rotation angle of the flaps 3, such as... Figure 9 As shown; the transmission rods 45 of the upper and lower centering guide mechanisms 4 are fixedly connected by a ring structure 46, as shown. Figure 3 As shown.

[0023] During operation, as the large rudder blade is slowly raised by the hoisting equipment, and the rudder pin 2 begins to enter the rudder knob hole 1, the bottom end of the rudder pin 2 first contacts the end of the lower probe rod 52. The lower probe rod 52 is pushed upward and rotates around its hinge axis, driving the lower transmission rod 45 to slide upward linearly through its internal slider structure. The cooperation structure between the slider and the transmission rod 45 can be achieved by fixing sliders on both the upper probe rod 51 and the lower probe rod 52, and opening grooves on the transmission rod 45 for the sliders to slide, so that the upper probe rod 51 and the lower probe rod 52 rise by pushing the transmission rod 45 upward through the sliders during the swinging process.

[0024] A first elastic element 44 is provided on the piston 43 to maintain a predetermined height. The upper probe rod 51 rises, causing the piston 43, which is fixed to it, to overcome the elasticity of the first elastic element 44 and slide upward in the cylinder 42, increasing the volume of the rodless chamber of the cylinder 42. Air is actively drawn in from the rudder pin hole 1 through the air hole 422. During the hot-fitting process of the rudder pin 2, the rudder pin 2 is heated and expanded before being inserted. The air in the rudder pin hole 1 expands rapidly due to the heat. If it is not discharged in time, it will form an air cushion effect, generating huge reverse resistance. The above structure can draw in this part of the air, reducing the air cushion resistance and ensuring smooth assembly. In addition, multiple upper probe rods 51 swing upward synchronously from all sides, and their sides contact the outer wall of the rudder pin 2 to form a radial clamping and centering structure, which accurately guides the upper end of the rudder pin 2 to the center position of the rudder pin hole 1.

[0025] Furthermore, when the upper probe rod 51 is pushed to a near-vertical position by the end of the rudder pin 2, the flap 3 at the top of the rudder pin 2 has passed the position of the radial chuck 62. At this time, the piston 43 and the upper transmission rod 45 continue to rise a short distance. This additional upward movement drives the linkage block 61, which is linked to the upper transmission rod 45, to rise. The inclined surface of the linkage block 61 pushes multiple radial chucks 62 to move synchronously inward, precisely engaging below the flap 3 that has already passed, forming a ring-shaped blocking lock. For example, Figure 3As shown, the centripetal chuck 62 has an inclined groove, and the wedge-shaped structure 61 has a protrusion that slides with the inclined groove so that the two are linked together.

[0026] In the above technology, the centering guide mechanism 4 and the probe assembly 5 are embedded in the inner wall of the rudder pin hole 1 through the annular groove 41, without occupying effective space. The cylinder 42, piston 43, and air hole 422 constitute an active air extraction structure to eliminate the air cushion resistance generated by heat assembly. The upper probe 51 slides with the transmission rod 45, and centering is completed synchronously when the rudder pin 2 rises. The linkage block 61 is linked with the radial chuck 62, and automatically locks after reaching the position, realizing the assembly of centering and locking.

[0027] As a further embodiment of the present invention, the probe assembly 5 also includes a pressure-holding roller 53 for pressing against the rudder pin 2, the pressure-holding roller 53 including a plurality of chambers 534 filled with hydraulic oil.

[0028] Specifically, the pressure-holding roller 53 includes a shaft 531, an outer circumference 532, and an arc-shaped elastic element 533 connecting the two. The pressure-holding roller 53 is rotatably mounted at the ends of the upper probe rod 51 and the lower probe rod 52. When the rudder pin 2 rises, the outer circumference 532 of the pressure-holding roller 53 forms a rolling contact with the surface of the rudder pin 2.

[0029] During operation, when the axis of the rudder pin 2 is completely aligned with the axis of the rudder knob hole 1, the radial pressure on each pressure-holding roller 53 is basically balanced, the hydraulic oil pressure in each chamber 534 remains stable, and the pressure-holding rollers 53 roll concentrically. However, when the rudder pin 2 is slightly deviated during the lifting process due to factors such as the shift of the hoisting center of gravity, deformation of the rudder blade itself, or machining errors in the rudder knob hole 1, the pressure-holding roller 53 on the deviated side will be subjected to additional radial force.

[0030] This additional radial force first acts on the hydraulic oil in the side chamber 534, causing its pressure to rise sharply. At this time, the outer circumference 532 of the pressure-holding roller 53 will undergo a slight radial deformation or eccentric rolling. The outer wall of the shaft 531 of the pressure-holding roller 53 and the inner wall of the outer circumference 532 are both provided with teeth 538, which are used to generate friction when the pressure-holding roller 53 is in an eccentric state, causing the outer circumference 532 to oscillate eccentrically around the shaft 531. This deformation and eccentric rolling will change the contact point position and friction direction between the roller and the rudder pin 2, thereby generating a small corrective torque on the surface of the rudder pin 2 opposite to the deflection direction.

[0031] As a further embodiment of the present invention, it also includes a flow channel 7 that connects the upper and lower pressure-holding rollers 53 and allows hydraulic oil to flow in one direction. The inner diameter of the flow channel 7 decreases in a stepped manner from top to bottom.

[0032] Specifically, the multiple chambers 534 within the pressure-holding roller 53 are all connected to the shaft 531 of the pressure-holding roller 53. One end of the shaft 531 of the upper pressure-holding roller 53 is provided with an oil inlet 71, and the other end is fixedly connected to the flow channel 7. One end of the shaft 531 of the lower pressure-holding roller 53 is provided with an oil outlet 72, and the other end is fixedly connected to the flow channel 7. The oil inlet 71 and the oil outlet 72 are externally connected via a circulating pump (not shown in the figure). The circulating pump is existing technology and will not be described in detail here. Because the rudder pin 2 is fitted with a rudder blade, the overall center of gravity will change due to the weight of the rudder blade. Therefore, when hoisting the rudder pin 2, it is most prone to overall skewness during the long-stroke insertion process, i.e., the upper part of the rudder pin 2 skews to one side, and the lower part skews in the opposite direction.

[0033] like Figure 7 As shown, the flow channel 7 connects the hydraulic system of the pressure-holding roller 53 located at the end of the upper probe 51 and the pressure-holding roller 53 located at the end of the lower probe 52, forming a complete hydraulic circuit. One-way valves are provided at both ends of the flow channel 7 to achieve unidirectional flow. The circulation pump is turned off during the assembly process.

[0034] When the upper part of the rudder pin 2 tilts laterally due to unstable lifting center of gravity or skewed lifting equipment, the pressure-holding roller 53 in the tilted direction is subjected to severe compression, causing a surge in hydraulic oil pressure in its internal chamber 534. High-pressure hydraulic oil will then release pressure outward through the internal channel. In this embodiment, this high-pressure hydraulic oil not only circulates within this roller but also flows downward through the flow channel 7 to the lower pressure-holding roller 53.

[0035] Because the inner diameter of flow channel 7 decreases in a stepped manner, according to the principle of fluid continuity, the hydraulic oil will accelerate its flow when passing through the variable diameter flow channel. After the narrowest point of the flow channel, the fluid kinetic energy is converted into pressure energy, forming a local high-pressure zone at the inlet of the lower pressure holding roller 53. This pressure amplification effect gives the lower pressure holding roller 53 a greater input pressure than the upper roller.

[0036] This greater pressure acts on the chamber 534 of the lower pressure-holding roller 53, causing its outer circumference 532 to expand radially more significantly than that of the upper roller. When the upper part of the rudder pin 2 deflects to the left, the pressure-holding roller 53 on the upper right side is compressed. Through the hydraulic amplification effect of the flow channel 7, the pressure-holding roller 53 on the lower left side expands radially, pushing the rudder pin 2 from the lower to the right. This creates a corrective torque on the rudder pin 2 that is opposite to the direction of the upper deflection. The deflection pressure at a certain point in the upper part is converted and amplified into an active corrective force at the symmetrical position in the lower part through the hydraulic amplification effect.

[0037] As a further embodiment of the present invention, it also includes a flexible rubber component 8, which is connected to the side of the plurality of transmission rods 45 facing the inner wall of the rudder button hole 1. The flexible rubber component 8 has a hollow structure 82 inside, and a liquid outlet hole 86 is provided on the side facing the rudder pin 2.

[0038] Specifically, the flexible rubber component 8 is fixedly connected to the side of the multiple transmission rods 45 facing the inner wall of the rudder knob hole 1, so it rises synchronously with the transmission rods 45. In the initial state, the flexible rubber component 8 is located at the larger diameter part of the lower part of the rudder knob hole 1, and its internal hollow structure 82 stores a certain amount of lubricating medium, such as high-viscosity lubricating oil or grease. The design of the hollow structure 82 not only provides storage space for the lubricating medium, but also gives the flexible rubber component 8 good compressibility.

[0039] When the rudder pin 2 begins to insert and the transmission rod 45 is driven upward by the lower probe rod 52, the flexible rubber part 8 also slides upward along the inner wall of the rudder button hole 1. Because the rudder button hole 1 is designed as a tapered structure that is narrower at the top and wider at the bottom, the flexible rubber part 8 is gradually radially squeezed by the inner wall of the rudder button hole 1 during its ascent. This squeezing action directly compresses the volume of the hollow structure 82 of the flexible rubber part 8, increasing the pressure of the lubricating medium inside and squeezing it out from the outlet hole 86 facing the rudder pin 2, uniformly coating the surface of the rising rudder pin 2. Common manual application of grease is difficult to guarantee the uniformity and continuity of lubrication and is easily scraped off during hoisting. The method of pre-setting fixed oil spray holes in the rudder button hole 1 has problems such as difficulty in controlling the timing of oil spraying, uneven distribution of lubricant, and easy waste and contamination of lubricant. In this invention, the flexible rubber part 8 only experiences squeezing and lubrication when the transmission rod 45 rises, i.e., when the rudder pin 2 is undergoing insertion. The lubrication point is always located in the contact area through which the rudder pin 2 is passing, achieving instant lubrication.

[0040] As a further embodiment of the present invention, the upper and lower end faces of the flexible rubber component 8 are serrated end faces 83 to achieve radial folding. A vertical partition 84 and a movable diaphragm 87 are provided inside. The movable diaphragm 87 divides the inner cavity of the flexible rubber component 8 into a liquid outlet cavity 85 and a liquid storage cavity. The liquid outlet hole 86 is opened on the liquid outlet cavity 85, and the movable diaphragm 87 is provided with a hole 872 offset. When the flexible rubber component 8 is compressed, the hole 872 aligns to increase the flow diameter.

[0041] Specifically, the flexible rubber component 8 has multiple arc-shaped grooves 81 on its side, and a hollow structure 82 inside. In the default or slightly compressed state, the holes 872 on the two diaphragms are staggered, resulting in a very small flow diameter between the reservoir and outlet chambers 85, restricting the free flow of the lubricating medium and effectively preventing leakage during non-operational periods. When the flexible rubber component 8 is subjected to greater radial pressure, i.e., when the transmission rod 45 rises to the narrower part of the rudder button hole 1, or when the rudder pin 2 deflects and compresses the flexible rubber component 8, the flexible rubber component 8 folds along the serrated end face 83, causing the two diaphragms 871 to move closer together. When the compression reaches a certain level, the holes 872 on the two diaphragms 871 begin to align, forming a clear channel.

[0042] As a further embodiment of the present invention, an inlet 9 is provided in the rudder button hole 1, and an opening 91 is provided on the side wall of the inlet 9. A connecting hole 88 is provided on the flexible rubber part 8. When the transmission rod 45 drives the flexible rubber part 8 to rise to a high position, the connecting hole 88 connects with the opening 91.

[0043] Specifically, the inlet 9 is located on the inner wall of the rudder knob hole 1, and its side wall has an opening 91. A corresponding connecting hole 88 is provided on the flexible rubber part 8. In the initial state or non-working state, the flexible rubber part 8 is in a low position, and the connecting hole 88 and the opening 91 are spatially separated, ensuring the sealing of the liquid storage chamber and preventing the lubricating medium from leaking when not replenished.

[0044] As a further embodiment of the present invention, the upper probe 51 is slidably engaged with the upper transmission rod 45 via a first slider 511. The first slider 511 is slidably disposed in the radial groove 512 of the upper probe 51 and is slidably engaged with the limiting rail 451 on the transmission rod 45. The lower probe 52 is slidably engaged with the limiting rail 451 on the transmission rod 45 below via a fixedly installed second slider 521.

[0045] Specifically, when the rudder pin 2 pushes up the lower probe rod 52, the lower probe rod 52 rotates around its hinge axis, and the second slider 521 moves in an approximately circular arc along the limiting rail 451 on the transmission rod 45, thereby converting the rotation of the lower probe rod 52 into the linear upward motion of the transmission rod 45.

[0046] In the initial stage when the upper probe rod 51 is lifted by the end of the rudder pin 2, the first slider 511 is in the outer position in the radial groove 512, and slides along the limiting rail 451 on the transmission rod 45, driving the upper transmission rod 45 to rise. Its motion mode is similar to that of the lower probe rod 52.

[0047] However, when the upper probe 51 is pushed to a near-vertical position, the flap 3 of the rudder pin 2 has already passed the position of the radial chuck 62. At this time, if the transmission rod 45 needs to continue to rise to drive the locking assembly 6 to complete the locking, the conventional fixed connection structure will force the upper probe 51 to continue to rotate, which may cause its end to excessively compress the rudder pin 2 or fail to make room, or even cause the mechanism to jam.

[0048] In this invention, when the transmission rod 45 needs to continue rising due to pneumatic drive, the first slider 511 can slide inward within the radial groove 512 and simultaneously slide upward along the limiting rail 451. This allows the rotation angle of the upper probe 51 body to remain essentially unchanged, while the transmission rod 45 can continue to rise independently.

[0049] The overall movement process is as follows: After the flap 3 of the rudder pin 2 has completely passed the upper probe rod 51, the control system introduces gas into the rodless chambers of the two cylinders 42. At this time, the upper transmission rod 45 continues to rise under the push of air pressure, the first slider 511 slides inward along the radial groove 512, the rotation angle of the upper probe rod 51 remains unchanged, the pressure holding roller 53 is slightly lifted and disengaged from the surface of the rudder pin 2, making room for the radial chuck 62 above.

[0050] The lower probe 52 is forced to rotate upward through the cooperation of the fixed second slider 521 and the limiting rail 451, so that the pressure holding roller 53 at the end of the lower probe 52 also disengages from the rudder pin 2, thereby realizing the synchronous retraction of the lower probe 52.

[0051] At this moment, both the upper and lower transmission rods 45 are in their raised high positions, and the two upper and lower flexible rubber parts 8 fixedly connected to them also reach their high positions. Because the rudder knob hole 1 has a tapered structure that is narrow at the top and wide at the bottom, the two upper and lower flexible rubber parts 8 are radially compressed by the inner wall of the rudder knob hole 1 at their high positions. The side facing the rudder pin 2 is tightly fitted with the outer wall of the rudder pin 2, and a closed annular sealing lubricating oil area is formed between the two upper and lower flexible rubber parts 8 and the outer wall of the rudder pin 2.

[0052] At this time, lubricating oil is injected into the sealed area through inlet 9. Under pressure, the lubricating oil evenly fills the tiny gap between the rudder pin 2 and the rudder knob hole 1. During this process, if the rudder pin 2 is slightly misaligned, the gap on the misaligned side is smaller, and the corresponding flexible rubber part 8 is subjected to greater radial compressive force. When the flexible rubber part 8 is compressed, the holes 872 on the movable diaphragm 87 align, the flow diameter increases, and the lubricating oil flow rate of the outlet hole 86 on that side increases significantly, thereby providing more sufficient lubrication on the misaligned side and assisting the rudder pin 2 in completing the final fine-tuning alignment before locking.

[0053] As a further embodiment of the present invention, the centering guide mechanism 4 also includes a folding stop 10 disposed above the annular groove 41. Specifically, after the rudder blade is assembled, the probe assembly 5 needs to be retracted into the annular groove 41; otherwise, it will interfere with the normal rotation of the rudder pin 2. However, the annular groove 41 itself is a recessed structure. If it is not protected, during the long-term service of the rudder blade, impurities such as silt and sand in the seawater, marine organisms (such as barnacles and oysters), and metal shavings generated by the rotation of the rudder pin 2 can easily enter the annular groove 41 and gradually accumulate, eventually causing the precision mechanisms such as the cylinder 42, transmission rod 45, and slider to jam or be damaged.

[0054] The folding stop 10 is used to solve this protection problem. During operation, when the probe rotates upward and retracts into the annular groove 41, the end of the probe (e.g., the pressure-holding roller (53)) will actively push the folding stop 10 upward, causing it to fold up along the preset creases like an accordion bellows, making room for the probe to retract. When the probe is fully retracted into the annular groove 41, the folding stop 10 loses the external pushing force and automatically unfolds by relying on its own elastic memory material properties or built-in torsion springs and other elastic structures, forming a smooth and continuous shielding surface that tightly covers the entire annular groove 41 and integrates with the inner wall of the rudder button hole 1.

[0055] As a further embodiment of the present invention, the locking component 6 further includes a second elastic member 63 disposed on the linkage block 61, the second elastic member 63 being used to hold the linkage block 61 in a low position.

[0056] Specifically, during the insertion of the rudder pin 2, the second elastic element 63 keeps the linkage block 61 pressed to the lower position. In this state, the radial chuck 62 is in the centrifugal position and fully retracted, so it will not obstruct the rising rudder pin 2 and its flap 3.

[0057] When the rudder pin 2 is in place and the rodless chamber 421 of the upper cylinder 42 is pressurized to push the transmission rod 45 upward, the transmission rod 45 overcomes the elastic force of the second elastic element 63, driving the linkage block 61 upward. The upward movement of the linkage block 61 causes its inclined surface to slide relative to the inclined surface of the radial chuck 62, thereby converting the upward motion into the driving force for the radial movement of the radial chuck 62. Multiple radial chucks 62 move radially in sync, eventually forming a closed annular block below the flap 3, completing the locking.

[0058] When the rudder needs to be disassembled, simply depressurize the rodless chamber 421 of the upper cylinder 42, and the restoring force of the second elastic element 63 will automatically push the linkage block 61 down, thereby driving the centrifugal chuck 62 to move centrifugally and automatically unlock.

[0059] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pneumatic self-locking quick-connect device for a ship's rudder blade, comprising a rudder knob hole (1) formed on the hull, and a rudder pin (2) fixedly disposed on the rudder blade and inserted into the rudder knob hole (1), characterized in that, Also includes: Circular grooves (41) are formed at the upper and lower ends of the rudder knob hole (1). The centering guide mechanism (4) is provided in the annular groove (41). The centering guide mechanism (4) includes a cylinder (42), a piston (43) slidably disposed in the cylinder (42), and a transmission rod (45) slidably along the rudder button hole (1). The rodless chamber of the cylinder (42) is connected to the inner wall of the rudder button hole (1) through an air hole (422), and a one-way valve (423) is provided at the air inlet of the rodless chamber. The probe rod assembly (5) is respectively rotated in the two annular grooves (41). The probe rod assembly (5) includes an upper probe rod (51) and a lower probe rod (52). The upper probe rod (51) is slidably engaged with the upper transmission rod (45) so as to drive the transmission rod (45) to slide upward when the upper probe rod (51) rotates upward. The locking assembly (6) includes a linkage block (61) linked to the transmission rod (45) and a radial chuck (62) driven by the linkage block (61). During the process of the rudder pin (2) pushing the upper probe rod (51) to rotate upward, the centering guide mechanism (4) draws gas from the rudder button hole (1) by sliding the piston (43) and drives the upper probe rod (51) to center the rudder pin (2). After the upper probe rod (51) is pushed to the predetermined position, the locking component (6) drives the centripetal chuck (62) to move centripetally to form a blocking lock.

2. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, The probe assembly (5) also includes a pressure-holding roller (53) for pressing against the rudder pin (2), the pressure-holding roller (53) including a plurality of chambers (534) filled with hydraulic oil.

3. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 2, characterized in that, It also includes a flow channel (7) that connects the upper and lower pressure-holding rollers (53) and allows hydraulic oil to flow in one direction. The inner diameter of the flow channel (7) decreases in a stepped manner from top to bottom.

4. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, It also includes a flexible rubber component (8), which is connected to the side of the multiple transmission rods (45) facing the inner wall of the rudder button hole (1). The flexible rubber component (8) has a hollow structure (82) inside and has a liquid outlet hole (86) on the side facing the rudder pin (2).

5. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 4, characterized in that, The upper and lower end faces of the flexible rubber part (8) are serrated end faces (83) to achieve radial folding. A vertical partition (84) and a movable diaphragm (87) are provided inside. The movable diaphragm (87) divides the inner cavity of the flexible rubber part (8) into an outlet cavity (85) and a storage cavity. The outlet hole (86) is opened on the outlet cavity (85), and the movable diaphragm (87) is provided with a hole (872) staggered. When the flexible rubber part (8) is compressed, the hole (872) aligns to increase the flow diameter.

6. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, An inlet (9) is provided inside the rudder knob hole (1), and an opening (91) is provided on the side wall of the inlet (9). A connecting hole (92) is provided on the flexible rubber part (8). When the transmission rod (45) drives the flexible rubber part (8) to rise to a high position, the connecting hole (88) connects with the opening (91).

7. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, The upper probe (51) is slidably engaged with the upper transmission rod (45) via the first slider (511). The first slider (511) is slidably disposed in the radial groove (512) of the upper probe (51) and is slidably engaged with the limiting rail (451) on the transmission rod (45). The lower probe (52) slides with the limiting rail (451) on the transmission rod (45) below via a fixed second slider (521).

8. The pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, The centering guide mechanism (4) also includes a folding stop (10) disposed above the annular groove (41).

9. A pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 2, characterized in that, The pressure-holding roller (53) includes a shaft (531), an outer circumference (532), and an arc-shaped elastic element (533) connecting the two.

10. A pneumatic self-locking quick-connect device for a ship's rudder blade according to claim 1, characterized in that, The locking component (6) further includes a second elastic element (63) disposed on the linkage block (61), the second elastic element (63) being used to hold the linkage block (61) in a low position.

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