An integrated lifting and steering structure for a marine jacking machine and the marine jacking machine.

Abstract

This invention relates to the field of marine equipment technology, and provides an integrated lifting and steering structure for a marine jacking machine, as well as the marine jacking machine itself. The integrated lifting and steering structure includes a screw, a housing, and a first sleeve, a second sleeve, a first stator assembly, and a second stator assembly disposed within the housing. The screw passes through the upper and lower ends of the housing, with its lower end used to connect to a propeller. The first and second sleeves are respectively sleeved on the screw. The first sleeve is threadedly connected to the screw, while the second sleeve slides axially and is circumferentially limited by the screw. The first and second sleeves are located at the centers of the first and second stator assemblies, respectively, and are configured as the rotors of the first and second stator assemblies. This achieves a truly highly integrated, compact, and independently reliable integrated design, significantly improving the overall rigidity and durability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of marine equipment technology, and more specifically, to a lifting and steering integrated structure for a marine jacking machine and the marine jacking machine itself. Background Technology

[0002] A marine buoy (or electronic anchor) is a device used to assist in the dynamic positioning of a vessel. It uses an underwater thruster to generate reverse thrust to resist external disturbances such as water currents and wind, keeping the vessel stable. It is particularly suitable for scenarios requiring precise positioning, such as sea fishing and ocean observation. To achieve effective positioning, the buoy must have two basic adjustment functions: a lifting function to adjust the thruster's entry depth to adapt to different water depths or to completely lift it out of the water; and a steering function to adjust the thruster's direction to compensate for the effects of water currents from different directions.

[0003] In traditional technology, the mainstream solution for achieving the aforementioned lifting and steering functions is a completely separate structure. That is, the lifting mechanism (usually a screw jack, hydraulic cylinder, or wire rope winch) and the steering mechanism (usually an independent rotary motor driving gears or worm gear mechanisms) are two separate systems, typically manufactured and installed separately, and fixed via the hull structure or additional connecting frames. This separate design has several significant drawbacks: First, the two independent systems occupy a large amount of deck or shipboard space, resulting in a loose layout; second, the installation process is cumbersome, requiring separate positioning, fixing, and debugging, increasing installation costs and time; third, the mechanical connection points or collaborative control interfaces between the two mechanisms are complex, and in the humid and vibrating marine environment, long-term wear, corrosion, or loosening can easily lead to decreased positioning accuracy and reduced reliability; finally, the separate structure also makes maintenance inconvenient, as troubleshooting and component replacement often involve multiple independent systems. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to provide a marine jacking engine structure that is truly highly integrated, compact in structure, and capable of independently and reliably controlling lifting and steering functions, so as to overcome the problems of large space occupation, complex installation and maintenance, and poor reliability caused by traditional split structures.

[0005] This invention provides an integrated lifting and steering structure for a marine jacking turbine, comprising a screw, a housing, and a first sleeve, a second sleeve, a first stator assembly, and a second stator assembly disposed within the housing. The screw passes through the upper and lower ends of the housing, with the lower end of the screw used to connect to a propeller. The first sleeve and the second sleeve are respectively sleeved on the screw, with the first sleeve threadedly connected to the screw and the second sleeve axially sliding and circumferentially limited connected to the screw. The first sleeve and the second sleeve are respectively located at the center of the first stator assembly and the second stator assembly, and are respectively configured as the rotors of the first stator assembly and the second stator assembly.

[0006] Optionally, the housing includes a cylinder and an upper end plate and a lower end plate connected to the upper and lower ends of the cylinder, the screw passes through the upper end plate and the lower end plate, and the first stator assembly and the second stator assembly are respectively embedded in the inner wall of the cylinder.

[0007] Optionally, the outer circumferential walls of the first stator assembly and the second stator assembly are respectively provided with axially extending ribs, and the inner wall of the cylinder is provided with axially extending grooves adapted to the ribs, and the ribs are connected in the grooves.

[0008] Optionally, the outer circumferential walls of the first stator assembly and the second stator assembly are respectively glued to the inner wall of the cylinder.

[0009] Optionally, the lower end of the upper end plate and the upper end of the lower end plate are respectively provided with bearing seats, and the upper end of the first sleeve and the lower end of the second sleeve are respectively rotatably connected to the two bearing seats at the upper and lower ends through bearings.

[0010] Optionally, the lower end of the first sleeve and the upper end of the second sleeve are slidably and sealingly connected.

[0011] Optionally, the outer circumferential wall of the screw is provided with an axial groove, and the inner circumferential wall of the second sleeve is provided with an axial protrusion that matches the groove, the protrusion being slidably connected within the groove.

[0012] Optionally, the screw is a hollow circular tube structure, with an external thread on one side of the outer circumferential wall of the screw, and the groove is provided on the other side of the outer circumferential wall of the screw.

[0013] Optionally, the first sleeve includes a cylindrical body and a copper nut embedded in the body, the nut having an internal thread adapted to the external thread.

[0014] Compared with related technologies, the integrated lifting and steering structure of the marine jacking machine provided by the present invention has the following technical advantages:

[0015] The marine jacking turbine provided by this invention features an integrated lifting and steering structure. This structure integrates the first stator assembly responsible for lifting, the second stator assembly responsible for steering, and their corresponding rotors—a first sleeve threaded to the screw and a second sleeve axially sliding and circumferentially limited by the screw—all encapsulated within a single housing, creating a deeply nested, highly integrated dual-drive unit. The screw, as the final actuator, passes through the housing, with its lower end connected to a thruster. This design physically integrates the lifting and steering drive systems into an inseparable module. Furthermore, when lifting is required, the first stator assembly drives the first sleeve to rotate, directly converting the rotational motion into precise axial linear motion of the screw via the threaded connection. When steering is required, the second stator assembly drives the second sleeve to rotate, with the second sleeve circumferentially limited to rotate the entire screw around its axis. This ensures that lifting and steering not only share the same screw and housing, but more importantly, achieves completely independent and decoupled control of the power source and actuator. The two operate without interference, resulting in rapid response and precise control. Therefore, this structure fundamentally overcomes the shortcomings of traditional split structures, such as large space occupation, complex installation, and low reliability, and achieves a truly highly integrated, compact, and independently reliable integrated design, significantly improving the overall rigidity and durability of the equipment.

[0016] In addition, the present invention also provides a marine jacking machine, including the lifting and steering integrated structure of the marine jacking machine as described above.

[0017] Compared with related technologies, the marine jacking machine provided by the present invention has roughly the same technical effect as the above-mentioned integrated lifting and steering structure of the marine jacking machine by setting up the lifting and steering structure of the marine jacking machine as described above, and will not be repeated here. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the integrated lifting and steering structure of the marine jacking machine according to an embodiment of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the housing of the marine jacking machine with integrated lifting and steering structure according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10-Screw, 11-Slide groove, 12-External thread, 20-House, 21-Cylinder, 22-Upper end plate, 23-Lower end plate, 24-Upper bearing seat, 25-Lower bearing seat, 30-First sleeve, 40-Second sleeve, 50-First stator assembly, 51-First rib, 60-Second stator assembly, 61-Second rib. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0024] In the description of this invention, the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0027] like Figure 1 and Figure 2As shown, this embodiment of the invention provides an integrated lifting and steering structure for a marine jacking turbine, including a screw 10, a housing 20, and a first sleeve 30, a second sleeve 40, a first stator assembly 50, and a second stator assembly 60 disposed within the housing 20. The screw 10 passes through the upper and lower ends of the housing 20, and the lower end of the screw 10 is used to connect to a propeller. The first sleeve 30 and the second sleeve 40 are respectively sleeved on the screw 10. The first sleeve 30 is threadedly connected to the screw 10, and the second sleeve 40 is axially sliding and circumferentially limited connected to the screw 10. The first sleeve 30 and the second sleeve 40 are respectively located at the center of the first stator assembly 50 and the second stator assembly 60, and are respectively configured as the rotors of the first stator assembly 50 and the second stator assembly 60.

[0028] It should be noted that the above structure constitutes the core "dual-stator dual-rotor" integrated architecture of this embodiment. By coaxially and compactly arranging two functionally independent drive units (stator assemblies) and their corresponding execution units (sleeves) within a single housing 20, and sharing a single output screw 10, the ultimate utilization of physical space is achieved. This not only perfectly solves the fundamental problems of large space occupation and complex installation and maintenance of traditional split structures, but also eliminates the complex mechanical clutch and transmission switching mechanism, making the driving and control of lifting and steering functions completely independent, and fundamentally improving system reliability, response speed, and control accuracy. Among them, the first stator assembly 50 and the second stator assembly 60 are both toroidal motor stators. When their windings are energized, they can generate rotating magnetic fields at their respective centers, driving the first sleeve 30 and the second sleeve 40 (as rotors) located within them to rotate. The first sleeve 30 engages with the screw 10 through its internal threads, forming a "rotation-linear" motion conversion pair; the second sleeve 40 is connected to the screw 10 through circumferential limiting connection (e.g., key and keyway), forming a "rotation-rotation" motion transmission pair.

[0029] Specifically, the entire structure is a complete module, with its housing 20 directly fixed to the stern plate or side of the ship via flanges or bolts. The lower end of the screw 10 extends into the water to connect to the propeller. The first sleeve 30 and the second sleeve 40 are arranged vertically along the axial direction of the screw 10 within the housing 20 and are supported by bearings and other structures to ensure smooth rotation. This design highly condenses two traditionally independent drive systems (lifting motor + steering motor) and their transmission mechanisms into a compact cylindrical space.

[0030] In this embodiment, the integrated lifting and steering structure of the marine jacking machine provides a deeply nested, highly integrated dual-drive unit by integrating the first stator assembly 50 responsible for driving lifting, the second stator assembly 60 responsible for driving steering, and their respective rotors—namely, the first sleeve 30 threadedly connected to the screw 10 and the second sleeve 40 axially sliding and circumferentially limitingly connected to the screw 10—all within the same housing 20. The screw 10, as the final actuating component, passes through the housing 20, with its lower end connected to the thruster. This design allows the lifting and steering drive systems to be physically integrated into an inseparable whole module. Furthermore, when lifting is required, the first stator assembly 50 drives the first sleeve 30 to rotate, directly converting the rotational motion into precise axial linear motion of the screw 10 through the threaded joint; when steering is required, the second stator assembly 60 drives the second sleeve 40 to rotate, with the second sleeve 40 driving the screw 10 to rotate around its axis through a circumferentially limiting connection. This allows the lifting and steering functions to not only share the same screw 10 and the same housing 20, but more importantly, it achieves completely independent and decoupled control of the power source and the actuator. The two operate without interference, resulting in rapid response and precise control. Therefore, this structure fundamentally overcomes the shortcomings of traditional split structures, such as large space occupation, complex installation, and low reliability. It achieves a truly highly integrated, compact, and independently reliable integrated design, significantly improving the overall rigidity and durability of the equipment.

[0031] Optionally, such as Figure 1 and Figure 2 As shown, the housing 20 includes a cylinder 21 and an upper end plate 22 and a lower end plate 23 connected to the upper and lower ends of the cylinder 21. The screw 10 passes through the upper end plate 22 and the lower end plate 23. The first stator assembly 50 and the second stator assembly 60 are respectively embedded in the inner wall of the cylinder 21.

[0032] Specifically, the cylinder 21, the upper end plate 22, and the lower end plate 23 are typically connected by bolts and fitted with sealing rings to form a waterproof and corrosion-resistant sealed cavity. The first stator assembly 50 and the second stator assembly 60 can be press-fitted or bonded to the inner wall of the cylinder 21 side by side, with their axes coinciding with the axis of the cylinder 21, ensuring coaxiality with the sleeve rotor.

[0033] In this embodiment, a modular "cylinder + end plate" shell structure is adopted, which facilitates processing, assembly, and overall sealing. The two stator assemblies are directly embedded in the inner wall of the cylinder 21, which serves as the main load-bearing structure, thus integrating the motor stator with the shell 20. This greatly enhances the overall structural rigidity and provides a good heat dissipation path for the stator assemblies. The screw 10 passes through the end plates at both ends, forming a stable support boundary and ensuring the straightness and stability during long-stroke motion.

[0034] Optionally, such as Figure 1 and Figure 2 As shown, the outer circumferential walls of the first stator assembly 50 and the second stator assembly 60 are respectively provided with axially extending ribs, and the inner wall of the cylinder 21 is provided with an axially extending groove adapted to the ribs, and the ribs are connected in the grooves.

[0035] Specifically, the engagement of the ribs and the slots restricts the movement of the stator assembly in the circumferential and radial directions, but allows for a certain amount of axial adjustment allowance or thermal expansion space. This connection method facilitates alignment during assembly and transmits torque, preventing the stator assembly from rotating within the housing. Furthermore, as... Figure 2 As shown, the outer circumferential wall of the first stator assembly 50 is provided with a first rib 51, and the outer circumferential wall of the second stator assembly 60 is provided with a second rib 61. The size and quantity of the first rib 51 and the second rib 61 can be set according to actual needs.

[0036] In this embodiment, the mating structure of the ribs and slots provides precise circumferential positioning and reliable torsional resistance for the installation of the stator assembly within the cylinder 21. This ensures that the electromagnetic centers of the first stator assembly 50 and the second stator assembly 60 are aligned with their mechanical centers, which is crucial for ensuring motor drive efficiency and reducing vibration and noise. Simultaneously, this structure simplifies the assembly process.

[0037] Optionally, such as Figure 1 and Figure 2 As shown, the outer circumferential walls of the first stator assembly 50 and the second stator assembly 60 are respectively glued to the inner wall of the cylinder 21.

[0038] Specifically, after the stator assembly is installed into the cylinder 21 and initially positioned, a highly thermally conductive, high-strength epoxy resin or other sealant is injected into the gap between the stator assembly and the inner wall of the cylinder 21. The injection fills all the gaps, forming a strong bond, and serves to seal, conduct heat, and dampen vibration.

[0039] In this embodiment, the potting compound further strengthens the bond between the stator assembly and the housing 20, eliminating the possibility of fretting wear. The adhesive layer effectively conducts the heat generated during stator operation to the metal wall of the housing 20, thereby dissipating it into the external environment, significantly improving the motor's heat dissipation conditions, increasing power density, and enhancing long-term operational reliability. Furthermore, the adhesive layer also enhances the overall module's waterproof and corrosion-resistant properties.

[0040] Optionally, such as Figure 1 and Figure 2As shown, the lower end of the upper end plate 22 and the upper end of the lower end plate 23 are respectively provided with bearing seats, and the upper end of the first sleeve 30 and the lower end of the second sleeve 40 are respectively rotatably connected to the two bearing seats at the upper and lower ends through bearings.

[0041] Specifically, an upper bearing seat 24 is provided at the lower end of the upper end plate 22, and a lower bearing seat 25 is provided at the upper end of the lower end plate 23. The upper bearing seat 24 and the lower bearing seat 25 are usually machined integrally with the end plates or manufactured separately and then fixed. The bearings are preferably angular contact ball bearings or tapered roller bearings that can withstand both radial force and a certain axial force simultaneously. This arrangement places the rotational support points of the two sleeves at both ends of the housing 20, forming a stable "two-point support" structure.

[0042] In this embodiment, the ends of the two sleeves are supported by dedicated bearing seats on the upper and lower end plates, providing a high-precision, low-friction rotary support for the sleeves. This support method ensures the concentricity and stability of the first sleeve 30 and the second sleeve 40 during high-speed rotation, reduces vibration and wear, directly improves the efficiency of thread transmission and steering positioning accuracy, and extends the service life of bearings and seals.

[0043] Optionally, such as Figure 1 and Figure 2 As shown, the lower end of the first sleeve 30 and the upper end of the second sleeve 40 are slidably and sealingly connected.

[0044] Specifically, the lower outer diameter of the first sleeve 30 is precisely fitted with the upper inner diameter of the second sleeve 40, i.e., the ends of the two sleeves are nested together. Wear-resistant bushings can be installed or the two sleeves can be used directly as a sliding pair. A sealing ring (such as an O-ring) is provided between the mating surfaces of the two sleeves to prevent the leakage of lubricating oil inside the housing 20 and the intrusion of external moisture into the gap between the two sleeves.

[0045] In this embodiment, the sliding sealing connection at the ends of the first sleeve 30 and the second sleeve 40 achieves dynamic sealing at the junction of the two moving parts. This allows the two sleeves to rotate independently when needed (e.g., when only lifting or only turning), while ensuring the sealing integrity of the entire cavity of the housing 20. This design is key to accommodating two independent moving units within a compact space, while effectively protecting the internal precision components.

[0046] Optionally, such as Figure 1 and Figure 2 As shown, the outer circumferential wall of the screw 10 is provided with an axial groove 11, and the inner circumferential wall of the second sleeve 40 is provided with an axial protrusion that matches the groove 11. The protrusion is slidably connected to the groove 11.

[0047] Specifically, the cross-sections of the groove 11 and the convex strip can be rectangular, trapezoidal, or dovetail-shaped. After the convex strip is embedded in the groove 11, the two form a tight fit in the circumferential direction and cannot rotate relative to each other, but the convex strip can slide freely axially along the groove 11.

[0048] In this embodiment, the core connection relationship of "circumferential restriction and axial freedom" between the two is reliably achieved with the simplest mechanical structure by the cooperation between the sliding groove 11 on the screw 10 and the protrusion on the inner wall of the second sleeve 40. This allows the rotation of the second sleeve 40 to be transmitted to the screw 10 without loss to achieve steering, while not hindering the axial movement that the screw 10 must make for lifting and lowering. The design is ingenious, efficient and reliable.

[0049] Optionally, such as Figure 1 and Figure 2 As shown, the screw 10 is a hollow circular tube structure. An external thread 12 is provided on one side of the outer circumferential wall of the screw 10, and the sliding groove 11 is provided on the other side of the outer circumferential wall of the screw 10.

[0050] Specifically, the screw 10 is made of hollow tubing, which reduces weight while ensuring sufficient bending and torsional strength. The external thread 12 and the groove 11 are staggered in the circumferential direction, for example, each occupying an arc surface of about 180 degrees, so they do not interfere with each other. This layout makes full use of the space of the cylindrical surface of the screw 10.

[0051] In this embodiment, the hollow screw 10 design significantly reduces the weight of moving parts and lowers the drive load, which is beneficial for improving energy efficiency and dynamic response speed. The "one-sided thread, one-sided groove 11" layout is an optimized solution that integrates two functional requirements on a single shaft. It allows the screw 10 to simultaneously meet the threaded transmission requirements with the first sleeve 30 and the guidance and torque transmission requirements with the second sleeve 40, which is the cornerstone of the highly compact overall structure. At the same time, the external thread 12 is provided on one side of the outer circumferential wall of the screw 10, that is, to retain part of the complete cylindrical surface, which significantly enhances the bending resistance of the screw 10 when subjected to the lateral water flow thrust of the propeller, and further improves the structural reliability.

[0052] Optionally, such as Figure 1 and Figure 2 As shown, the first sleeve 30 includes a cylindrical body and a copper nut embedded in the body. The nut is provided with an internal thread that is compatible with the external thread 12.

[0053] Specifically, the main body of the first sleeve 30 is typically made of steel or alloy with good magnetic permeability to serve as the rotor core of the motor. A copper nut is fixed in the inner bore by means of interference fit, heat fitting, or key connection, providing a wear-resistant, low-friction threaded contact surface.

[0054] In this embodiment, a composite structure with a steel body and a copper nut is adopted, cleverly combining the advantages of the two materials: the steel body provides structural strength and serves as an effective part of the motor rotor; the copper nut provides excellent wear resistance and self-lubricating properties, greatly extending the service life of the threaded pair and reducing transmission resistance and maintenance requirements. This design greatly improves the durability of the transmission components while ensuring driving performance.

[0055] In addition, another embodiment of the present invention provides a marine jacking machine, including the integrated lifting and steering structure of the marine jacking machine as described above.

[0056] For example, the marine jacking machine is mounted on the stern plate via the housing 20.

[0057] In this embodiment, the marine jacking machine provided in this embodiment has the same technical effect as the integrated lifting and steering structure of the marine jacking machine described above, and will not be repeated here.

[0058] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A lifting and steering integrated structure for a marine jacking machine, characterized in that, The assembly includes a screw (10), a housing (20), and a first sleeve (30), a second sleeve (40), a first stator assembly (50), and a second stator assembly (60) disposed within the housing (20). The housing (20) is fixed to the stern plate or the side of the ship. The screw (10) passes through the upper and lower ends of the housing (20). The lower end of the screw (10) is used to connect to the propeller. The first sleeve (30) and the second sleeve (40) are respectively sleeved on the screw (10). The first sleeve (30) is threaded to the screw (10). The second sleeve (40) slides axially and is circumferentially limited to the screw (10). The first sleeve (30) and the second sleeve (40) are respectively located at the center of the first stator assembly (50) and the second stator assembly (60), and are respectively configured as the rotors of the first stator assembly (50) and the second stator assembly (60). The first stator assembly (50) and the second stator assembly (60) are both ring motor stators. When their windings are energized, they can generate rotating magnetic fields at their respective centers, driving the first sleeve (30) and the second sleeve (40) located therein to rotate. When a lifting function is required, the first stator assembly (50) is controlled to drive the first sleeve (30) to rotate, and the rotational motion is converted into the axial linear motion of the screw (10) through the threaded pair; when a steering function is required, the second stator assembly (60) is controlled to drive the second sleeve (40) to rotate, and the second sleeve (40) drives the screw (10) to rotate around its axis through the circumferential limiting connection.

2. The integrated lifting and steering structure of the marine jacking machine according to claim 1, characterized in that, The housing (20) includes a cylinder (21) and an upper end plate (22) and a lower end plate (23) connected to the upper and lower ends of the cylinder (21). The screw (10) passes through the upper end plate (22) and the lower end plate (23). The first stator assembly (50) and the second stator assembly (60) are respectively embedded in the inner wall of the cylinder (21).

3. The integrated lifting and steering structure of the marine jacking machine according to claim 2, characterized in that, The outer circumferential walls of the first stator assembly (50) and the second stator assembly (60) are respectively provided with axially extending ribs, and the inner wall of the cylinder (21) is provided with an axially extending groove that matches the ribs, and the ribs are connected in the grooves.

4. The integrated lifting and steering structure of the marine jacking machine according to claim 3, characterized in that, The outer circumferential walls of the first stator assembly (50) and the second stator assembly (60) are respectively glued to the inner wall of the cylinder (21).

5. The integrated lifting and steering structure of the marine jacking machine according to claim 2, characterized in that, Bearing seats are provided at the lower end of the upper end plate (22) and the upper end of the lower end plate (23), respectively. The upper end of the first sleeve (30) and the lower end of the second sleeve (40) are rotatably connected to the two bearing seats at the upper and lower ends through bearings.

6. The integrated lifting and steering structure of the marine jacking machine according to claim 5, characterized in that, The lower end of the first sleeve (30) and the upper end of the second sleeve (40) are slidably and sealingly connected.

7. The integrated lifting and steering structure of the marine jacking machine according to claim 1, characterized in that, The outer circumferential wall of the screw (10) is provided with an axial groove (11), and the inner circumferential wall of the second sleeve (40) is provided with an axial protrusion that matches the groove (11). The protrusion is slidably connected in the groove (11).

8. The integrated lifting and steering structure of the marine jacking machine according to claim 7, characterized in that, The screw (10) is a hollow circular tube structure. An external thread (12) is provided on one side of the outer circumferential wall of the screw (10), and the groove (11) is provided on the other side of the outer circumferential wall of the screw (10).

9. The integrated lifting and steering structure of the marine jacking machine according to claim 8, characterized in that, The first sleeve (30) includes a cylindrical body and a copper nut embedded in the body. The nut is provided with an internal thread that is compatible with the external thread (12).

10. A marine jacking flow generator, characterized in that, Including the integrated lifting and steering structure of the marine jacking machine as described in any one of claims 1-9.

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