186results about "Hoisting/lowering gear" patented technology

The invention relates to the technical field of unmanned ship recovery devices, and provides an unmanned ship recovery device based on an openable guide wheel, which is simple in structure, convenient to operate, high in automation degree and capable of realizing autonomous recovery of an unmanned ship, and comprises a recovery cage and a guide wheel opening and closing mechanism mounted on the recovery cage, the guiding wheel opening and closing mechanism comprises an air cylinder, a guiding wheel frame, a flexible guiding wheel, a short rocker, a linear sliding rail, a gas cylinder providing power and a control assembly, the recycling cage is formed by correspondingly welding a plurality of metal square pipes, the gas cylinder and the control assembly are installed at the center of the head end of the recycling cage, it is guaranteed that the gravity center moves backwards as much as possible, and a plurality of hanging rings are installed above the recycling cage. The bottom of the recovery cage and the front end of the recovery cage are each provided with an unmanned ship supporting structure, the unmanned ship is prevented from directly colliding with a metal structure in the recovery cage, the middle of the recovery cage is hinged to the tail of the air cylinder, and the guide wheel frame and the short rocker are hinged to the tail of the recovery cage.

The invention relates to the technical field of ocean unmanned vehicles, and particularly discloses a wave glider laying and recovery system and a collaborative operation method thereof.The wave glider laying and recovery system is composed of a transferring laying device, a tail buoy, a flat cable recovery device and a salvage recovery rod; the moving, transporting and laying device adopts a modularized quick-release structure and a positive and negative thread screw collinear self-adjusting positioning mechanism and is matched with a hand-pulled spring shackle to achieve five-minute zero-assembly laying, and a tail buoy achieves floating body electric control separation through a waterproof steering engine driving lead screw nut transmission and a guide column-guide sleeve conical self-centering structure. The flat cable recovery device is designed based on an eccentric cam self-locking principle and a progressive clamping mechanism, and is combined with a three-stage hoisting strategy to complete efficient and lossless recovery of the flexible flat cable of 7-8 meters; the invention further discloses a collaborative operation method of the wave glider laying and recovery system, which comprises the processes of moving and positioning, device separation, hand pulling and releasing and underwater unfolding in a laying stage, and a time sequence linkage strategy of buoy separation, positioning and dragging and graded hoisting in a recovery stage.

The invention belongs to the technical field of ship engineering, and discloses a marine lifeboat side-leaning releasing device which comprises a main body, a winch is arranged on the surface of the main body, a supporting rod is rotationally connected to the interior of the main body, and a steel cable located at one end of the supporting rod is wound on the surface of the winch. According to the device, plugging of the liquid outlet pipe can be cancelled through the plugging block, then lubricating oil in the oil storage tank can enter the liquid outlet pipe, the liquid outlet pipe can lubricate the connecting position of the first connecting rod and the lifting hook and the connecting position of the handle and the shell, and finally plugging of the liquid outlet pipe by the plugging block is cancelled through the driving assembly; and furthermore, the connecting parts of the connecting rod I and the lifting hook as well as the handle and the shell can be lubricated, so that the frictional resistance at the connecting parts of the connecting rod I and the lifting hook as well as the handle and the shell is reduced, the connecting rod I and the lifting hook as well as the handle and the shell are operated more flexibly and smoothly, and the overall safety of the lifeboat releasing device is improved.

The invention discloses an energy management system of a marine lifeboat collecting and releasing device. The energy management system comprises a four-quadrant frequency converter, a super capacitor energy storage system and an energy path control module, the four-quadrant frequency converter is connected with a ship alternating current power supply and a servo motor; the direct current bus is connected with the braking unit, the braking resistor and the DC / DC bidirectional converter; the super capacitor is connected with the direct current bus through the DC / DC bidirectional converter; the energy path control module dynamically controls an energy path by monitoring the voltage and the charge state of the super capacitor in real time; through cooperative control of the four-quadrant frequency converter and the super-capacitor energy storage system, a three-level redundancy mechanism of energy storage buffering, power grid feedback and resistance energy consumption is formed, multi-level efficient utilization of regenerated energy is achieved, the energy utilization rate is increased, the problem that an existing device cannot achieve emergency recovery under the sudden power loss working condition is solved, and the energy utilization rate is increased. And the reliability and the environmental protection property of the system are obviously improved.

The invention relates to a release device (1) for releasing an object suspended therefrom under load, in particular for drop tests, wherein the release device (1) comprises: two complementarily shaped clamping jaws (3a, 3b), wherein the clamping jaws (3a, 3b) are each rotatably mounted about a bearing (2), wherein the clamping jaws (3a, 3b) are designed to hold a release bolt (4) with the hanging object attached thereto in the closed state; and a toggle lever with two legs (5, 6), wherein the legs are connected at their common connection to a bearing bolt (7) and are connected at their respective outer connections (22a, 22b) to the clamping jaws (3a, 3b), wherein the toggle lever is designed to hold the clamping jaws (3a, 3b) closed without actuating force in an overextended configuration against a mechanical stop (10);wherein the toggle lever is configured to release the locking of the clamping jaws (3a, 3b) by a primary stroke (24) of the bearing pin (7) resulting from the overextension of the toggle lever beyond the dead center, corresponding to a secondary stroke (25), so that the clamping jaws (3a, 3b) transition to an open state and the hanging object is dropped. The invention further relates to a method for releasing a hanging object under load.

This invention proposes a triangular-layout, angle-mounted multi-unmanned surface vessel (USV) deployment and recovery device to solve the problems of difficulty in recovering multiple USVs and the increased design complexity of the mother ship due to the recovery device. It includes a triangular pitch support frame unit mounted on the mother ship and a lifting device for receiving the USVs. The mother ship has a support, on which a rotating mechanism is mounted. A rotating platform is driven and connected to the rotating mechanism. Four rectangularly distributed hinged seats are fixedly connected to the rotating platform. Two of these hinged seats are hinged to the triangular pitch support frame unit, and the other two hinged seats are each hinged to a hydraulic rod. The telescopic ends of the hydraulic rods are hinged to the rear end of the triangular pitch support frame unit, and the hydraulic rods drive the triangular pitch support frame unit to perform pitching movements. The triangular pitch support frame unit includes an outer frame and an inner frame, with the inner frame located inside the outer frame. The outer frame includes two outer support frames and multiple support rods, and the inner frame includes two inner support frames and multiple connecting rods.

Vessel comprising means for deploying a floating dock This vessel comprising means for deploying a floating dock for implementing a boat on at least one side of the vessel and provided with a dock towing line and davits for suspending / maneuvering the dock, comprising motorized means (13, 14) for unwinding / winding cables (11, 12) for supporting the dock, is characterized in that it comprises means (15) for controlling the motorized means (13, 14) for unwinding / winding the dock support cables to maintain constant tension in them. Figure for the abstract: Figure 3

The invention relates to a high-seaworthiness separable pentamaran and a working method thereof. A high-seaworthiness separable pentamaran comprises a mother ship, two sub-ship pairs are arranged on the mother ship, and a single sub-ship pair comprises two sub-ships which are symmetrically arranged relative to the mother ship; the deck of the mother ship extends towards the two sides respectively to form symmetrical connecting bridges, the bottoms of the two connecting bridges are each provided with at least one containing groove, the containing grooves and the son ships are arranged in a one-to-one correspondence mode, and a connecting module is installed in each containing groove in a matched mode. The single sub-ships are connected into the corresponding containing grooves through the connecting modules, or the single sub-ships are separated from the corresponding containing grooves through the connecting modules. By arranging the separable mother ship and the multiple pairs of son ships, the interisland transportation requirement can be met based on multiple modes, adaptability is high, seakeeping performance is good, sailing can be conducted under the high sea condition, and therefore the interisland transportation efficiency is effectively improved.

The invention discloses a sea surface auxiliary laying and recovery device for an unmanned ship. The sea surface auxiliary laying and recovery device comprises a mother ship side mounting base, an unmanned ship side mounting base and a buffer damping swing arm assembly. The buffer damping swing arm assembly comprises a longitudinal damping mechanism and a transverse damping mechanism; the longitudinal damping mechanism is configured to be stretched when the unmanned ship is far away from the side board of the mother ship to generate damping force to slow down the far-away movement trend, and is compressed when the unmanned ship is close to the side board of the mother ship to generate damping force to slow down the close-to movement trend; the transverse damping mechanism is configured in the mode that when the unmanned ship moves forwards relative to the mother ship, the first side of the transverse damping mechanism is compressed, the second side of the transverse damping mechanism is stretched, damping force is generated to slow down the forward movement trend, and when the unmanned ship moves backwards relative to the mother ship, the first side of the transverse damping mechanism is stretched, the second side of the transverse damping mechanism is compressed, damping force is generated to slow down the backward movement trend. When the method is used for launching and recovery operation, the transverse and longitudinal displacement variation of the unmanned ship is greatly reduced, and the safety and success rate of launching and recovery are effectively improved.

The present application provides a life raft hoisting device, which includes a main body frame and a plurality of positioning members; a through hole is provided in the main body frame for the life raft to pass through; a cross beam, a first lifting ring and a plurality of second lifting rings are provided at the top of the main body frame, and the plurality of second lifting rings are distributed at the ends of the main body frame; the first lifting ring is connected to the lower side wall of the cross beam and is jointly traction-connected with the plurality of second lifting rings to the ropes of the fixture of the life raft, so that the ropes can be tractioned along the plurality of second lifting rings and the first lifting ring under the action of manual force or driving force, thereby realizing the movement of the life raft in the height direction. The plurality of positioning members are arranged at the positioning stations of the main body frame, the plurality of positioning members are arranged along the horizontal direction and are at the same height; the plurality of positioning members are arranged annularly along the inner side wall of the through hole and are distributed around the fixture connected to the life raft to be positioned and connected with each side surface of the fixture, ensuring the centricity of the fixture of the life raft and the life raft relative to the center of the positioning station.

Marine craft comprising a recovery device from a naval vessel The marine craft (1) comprises a body (4) and a recovery device (8) for the marine craft from a naval vessel (2), said recovery device (8) comprising a mast (14) up to a second free end (18), said second end (18) carrying at least one gripping element (30) for the marine craft, arranged to be grasped from a reception platform of a naval vessel (2) rising to a height greater than that of the body (4). The first end (16) of the mast (14) is mounted on a stabilizing device (20) for the mast (14) relative to the body (4), said stabilizing device (20) being arranged to compensate at least for the rolling movements of the body (4) so ​​as to keep the mast (14) aligned in a substantially vertical direction. Figure for abstract: 1

This invention discloses an unmanned collaborative emergency rescue system and method for special disasters involving ships in complex waters. The system, centered on a rescue mother ship, integrates unmanned fishing and rescue boats, intelligent fire detection boats, in-cabin emergency response robots, and tethered drones, constructing an integrated "air-water-cabin" unmanned equipment cluster. Information interconnection is achieved through a three-dimensional perception network and a flexible fusion communication network. The system integrates multi-source perception data through a collaborative control terminal and intelligently schedules each piece of equipment for collaborative operations based on preset decision logic. This invention enables tiered proactive rescue of personnel on the water, precise "internal detection and external attack" fire suppression of fires inside ships, and in-cabin emergency response, while maintaining communication via drone relay in signal-blocked environments. This invention solves the technical challenges of traditional rescue methods in responding to internal ship disasters, rescuing disabled persons, and collaborative operations in complex environments, significantly improving rescue efficiency and safety.

The invention discloses a one-time laying system for a wave glider and a collaborative operation method of the one-time laying system, and belongs to the technical field of ocean engineering. The system comprises a wave glider and a transferring and laying device. The moving, transporting and laying device is a detachable separation support, and an upper laying support and a lower moving support are connected through a positioning pin. The laying support is provided with a bearing face matched with the ship body, four hanging rings, a supporting rod for supporting the traction machine and a floating body arranged on the middle rear portion. The method comprises the steps that the device is moved to a deck to be locked; the positioning pins are taken down, and the whole support and the glider are vertically hoisted and laid through the four slings; when the glider is immersed in water, the bracket inclines forward by using the floating body, and the glider is automatically separated; and the mother ship leaves and recycles the laying bracket. Rapid, stable and safe one-time laying of the wave glider under the complex sea condition is achieved, the risk of graded laying and umbilical cable winding are avoided, and the operation efficiency and safety are remarkably improved.

Device adapted for launching and recovering a marine craft, comprising a skirt for guiding the marine craft Device (16) for launching and recovering a marine craft (14), comprising a floating reception structure (20) defining a reception space (28) for the marine craft and an access opening (30), the reception structure comprising: - two lateral parts (32A, 32B) extending in an engagement direction (L) and located on either side of the reception space, - a tubular frame element (34A) connecting the two lateral parts and located under the reception space, the opening being delimited at least by the two lateral parts and the frame element.The device comprises a skirt (24) comprising an elastomeric material, the skirt having a front portion fixed to the frame element, two side portions fixed to the receiving structure, and a middle portion inclined downwards and forming a ramp (58) adapted to guide a bow of the marine craft towards the opening during recovery. Figure for abstract: Figure 2.

The present application relates to a kind of multi-posture UUV water surface autonomous recovery device and method, belong to UUV recovery underwater operation technical field.Solve the problem that the structure for recovery on UUV easily influences the underwater operation of UUV. Including frame structure, cage, buffer mechanism and winch, the front side of frame structure is equipped with winch, the middle part of frame structure is connected with the middle part of cage by buffer mechanism, the tail of frame structure is hinged with the tail of cage, and winch is connected with the front side of cage by cable.In the UUV recovery of the present application, it is not necessary to set up the recovery structure matched with UUV on UUV, not only reduce the design difficulty of UUV, its smooth surface better carries out underwater operation, but also can adapt to the recovery of multiple models of UUV.

A retractable davit assembly includes a davit arm (20) that retracts into a davit arm channel (22) formed within the internal volume of a deck (24) of the superstructure (16) of a yacht (10) or other vessel. An outer end of the davit arm (20) includes a fairing (44) matching a profile of the surrounding outer edge of the deck (44), such that the davit arm (20) is concealed when retracted.

The invention belongs to the technical field of ship equipment, and provides marine rescue boat launching equipment which comprises a bottom plate, an elastic damping mechanism and a turnover mechanism. The two turnover mechanisms are located in the front-back direction of the rescue boat, and the tail ends of the two rope bodies are used for being connected with the front end and the rear end of the rescue boat correspondingly. The elastic damping mechanisms are arranged on the bearing rods of the two turnover mechanisms; the rope body is connected with the elastic damping mechanism, the elastic damping mechanism is used for stably descending the rescue boat, and the elastic damping mechanism is located between the winch and the rescue boat; according to the rescue boat launching equipment for the ship, a passive wave compensation scheme is adopted, under the condition that the continuity of the steel strand is not affected, the tension change of the steel strand can be rapidly responded, and therefore the effective and stable wave compensation scheme is achieved.

The present invention discloses an autonomous deployment and recovery system for an unmanned marine system, comprising a mother ship platform, a lifting crane, a mooring cable, a lifting frame, and a surface mobile support; the lifting crane is mounted on the mother ship platform, and is connected to the surface mobile support via a mooring cable and a lifting frame; a U-shaped space for placing the unmanned marine system is formed on the surface mobile support, and an opening for the unmanned marine system to enter and exit the U-shaped space is left at the tail end of the surface mobile support; a positioning communication antenna and a control system are also provided on the surface mobile support, and an azimuth propeller for promoting its autonomous movement and dynamic positioning is provided at the bottom of the surface mobile support, and the azimuth propeller is connected to the control system. The system of the present invention deploys and recovers the unmanned marine system via a suspendable surface mobile support, and can adapt to the deployment and recovery requirements under higher speeds and more complex sea conditions of the mother ship, and has the advantages of fast deployment and recovery speed, high efficiency, and a high degree of autonomy.

The application provides an ARV relay laying and recycling device and method, and belongs to the field of underwater robot recycling. The application better solves the recycling problem of ARV in mud point monitoring operation. The ARV relay laying and recycling device comprises a TMS frame, a tail side thruster, an optical fiber communication device, an underwater winch system, an USBL acoustic positioning system, a head side thruster, a power supply module, an ARV tail locking self-locking device, an ARV head locking self-locking device, an ARV guide rod, a left main thruster, a right main thruster, an ARV docking locking device and a TMS control system. The TMS frame comprises a lower tray frame and an upper support frame connected to the upper end face of the lower tray frame. After the TMS control system responds to a signal, the tail side thruster and the head side thruster are controlled to adjust the positions of the ARV tail locking self-locking device and the ARV head locking self-locking device, so that the self-locking of the ARV is completed. The ARV docking locking device is arranged at the front end of the ARV and is used for cooperating with the ARV guide rod to limit the freedom degree of the ARV. The device is mainly used for recycling the ARV.

The invention belongs to the technical field of ships, and discloses a ship evacuation lifesaving system and a ship. The ship evacuation life-saving system comprises a rescue boat, a first hoisting device, a life raft, a second hoisting device, a life boat and a life boat storage rack. The ship is provided with a rescue boat storage position, the rescue boat is contained in the rescue boat storage position, and the first hoisting device is arranged on one side of the rescue boat storage position and configured to hoist the rescue boat away from the rescue boat storage position and lower the rescue boat to the water surface. The ship is provided with a life raft storage position, and the second hoisting device is arranged on one side of the life raft storage position and configured to hoist the life raft away from the life raft storage position and lower the life raft to the water surface. The lifeboat storage rack is arranged on the ship, the lifeboat is arranged on the lifeboat storage rack, and the lifeboat storage rack can lower the lifeboat to the water surface. The ship evacuation lifesaving system can be flexibly arranged according to the space of the ship, a release test is not needed, and the later maintenance cost is low.

The present invention provides a lifeboat hoisting device in a luxury yacht, which includes a moving beam. An installation groove along the axial direction of the yacht is provided on the flying bridge of the luxury yacht from the rear end forward. The moving beam can move back and forth along the installation groove and is telescopically arranged in the flying bridge of the yacht. When the lifeboat hoisting operation is not carried out, the moving beam can be hidden in the flying bridge. By adopting a cable system for force reduction transmission, the lifeboat hoisting operation has low noise and is stable. Compared with a sectional telescopic arm, the movement is precise. Through the cable threading route of the present invention, it can not only achieve force reduction transmission, but also occupy less space. It can be arranged beside the moving beam, hidden in the flying bridge, and has a low motor power requirement, being suitable for operation in the flying bridge.

An anti-swing gunwale rotary retracting and releasing device comprises a base arranged on a deck, a rotary support arranged on the base, a rotary driving device for driving the rotary support to rotate relative to the base, a suspension arm connected to the rotary support, a corner pulley arranged on the suspension arm and a head pulley arranged on the front portion of the extension direction of the suspension arm. The anti-swing cylinder is connected to the head pulley, and the hydraulic winch is arranged on the suspension arm. According to the utility model, stable, rapid and safe ship retracting and releasing operation under a high sea condition is realized.

The present invention provides a modular small boat retracting and deploying device, which is composed of a top recovery mechanism, a middle auxiliary positioning mechanism, and a lower support base from top to bottom in sequence. A winch for retracting and deploying the lower support base is installed on the top recovery mechanism, and the winch is provided with a plurality of steel wires that pass through the middle auxiliary positioning mechanism and are connected to the lower support base; the middle auxiliary positioning mechanism is provided with a floating body frame, the side wall of the floating body frame is provided with a plurality of wave-passing holes, and a plurality of buffer guiding rollers are arranged along the inner wall of the floating body frame. A plurality of longitudinal through holes for the steel wires to pass through are provided on the floating body frame; at least two pairs of adaptive support bases are provided on the lower support base, and a plurality of vertical positioning support columns are provided on the side of the lower support base. The present invention has low requirements for ships, is applicable to various ships, has a small deck occupation area, does not require fixed installation, is flexible and convenient for storage, and has strong sea condition adaptability, and can retract and deploy the boat stably and safely even under strong wind and wave conditions.

Title of the invention: Device for launching or raising a floating structure. The invention relates to a device for launching or raising a floating structure (1) (2), comprising at least one ramp (4) having a first end (4a), a second end (4b) opposite the first end (4a), and a sliding device (6) for the floating structure (2) on the ramp (4). The launching or raising device (1) comprises a pivoting member (8) of the ramp (4) connected to it at a point located between the first end (4a) and the second end (4b) of the ramp (4), and a movement device (38) configured to generate a displacement of the floating structure (2) on the ramp (4). The launching or raising device (1) comprises at least one float (10) connected to one of the ends (4b) of the ramp. (4) and at least one means (12) for managing the buoyancy of the float (10). Figure of the abstract: Figure 1.

The present invention belongs to the technical field of unmanned boats, and more specifically, relates to an unmanned boat recovery system. The unmanned boat recovery system is provided with an anti-sway mechanism and a lifting net. On the lifting arm of the anti-sway mechanism, a lifting rope is threaded through the cavity of the inner sleeve. The net body of the lifting net is connected to the lifting hook, and the net body can be kept unfolded through a net spreading structure. The lifting net captures the hook of the unmanned boat from various angles, reducing the influence of wind and waves on the unmanned boat recovery operation and shortening the capture time. In addition, after the net body captures the unmanned boat, it is recovered to the retracted state and can be moved into the inner sleeve, so that the unmanned boat abuts against the inner sleeve, and a rigid connection is realized between the unmanned boat and the lifting arm by means of the unmanned boat abutting against the inner sleeve, thereby reducing the sway of the unmanned boat, avoiding large-amplitude sway of the unmanned boat, and realizing the efficient and safe lifting and stable moving recovery of the unmanned boat.

The utility model discloses a locking structure of an oscillation stopping device and the oscillation stopping device, which belong to the field of oscillation stopping equipment and are used for solving the problem that the locking piece of the existing oscillation stopping device cannot stably and reliably lock an underwater robot, the locking structure of the oscillation stopping device comprises a connecting cylinder and a locking plate, the connecting cylinder is provided with at least two abdicating holes, and the locking plate is arranged on the connecting cylinder. The receding holes are circumferentially formed in the side face of the connecting cylinder at equal intervals and communicate with the interior and the exterior of the connecting cylinder. The lock plate is rotationally connected with the connecting cylinder, and comprises a first limiting part and a second limiting part which are respectively positioned above and below the rotary connecting part; the rotating path of the locking plate comprises a locking position, when the locking plate is located at the locking position, the locking plate is used for locking the connector, the first limiting part abuts against the outer side of the connecting cylinder, the second limiting part abuts against the hole wall of the lower end of the receding hole, and the acting force of the connector on the locking plate is evenly dispersed to the two abutting positions of the locking plate and the connecting cylinder. The stress area of the locking structure of the oscillation stopper is increased, the stress is reduced, and the locking plate and the connecting cylinder are not easy to wear under alternating stress.

The invention relates to the technical field of ocean engineering equipment, in particular to a retractable A-shaped frame of deep sea underwater equipment. Comprising A-shaped frame bodies, two first hydraulic cylinders and two bases, connecting arms are arranged on the bases, second hydraulic cylinders are hinged to the ends, away from the connecting arms, of the bases, the connecting arms are hinged to the second hydraulic cylinders and located at the output ends of the second hydraulic cylinders, and the A-shaped frame bodies are hinged to the corresponding bases and located on the two bases. The A-shaped frame body is further hinged to the corresponding first hydraulic cylinders and located at the output ends of the first hydraulic cylinders, and the two first hydraulic cylinders are hinged to the corresponding connecting arms and located in the middles of the connecting arms respectively. And through the design, the angle and the position of the A-shaped frame can be adjusted according to operation requirements, and the flexibility and the accuracy of operation are improved.

The invention discloses a shipborne single-arm double-lifting-point adjustable small boat folding and unfolding device, and belongs to the technical field of ships. The device comprises an arm retracting and releasing structure, a suspension arm structure and two slings, one end of the arm retracting and releasing structure is installed on a ship deck and can overhang or retract relative to a ship, the other end of the arm retracting and releasing structure is hinged to one end of the suspension arm structure, a first fixed pulley is arranged on the arm retracting and releasing structure, and one end of a sling is wound and penetrates through the first fixed pulley to be connected with a small boat; the suspension arm structure can rotate vertically, a second fixed pulley is arranged at the other end of the suspension arm structure, and one end of the other suspension cable penetrates through the second fixed pulley in a winding mode to be connected with the small boat. By rotating the suspension arm structure, the connection position of the slings penetrating through the second fixed pulley in a winding mode and the small boat can be changed, and adjustment of the suspension distance formed by the two slings is achieved. The boat lifting stability is improved, the boat lifting distance can be adjusted, and the boat lifting safety, flexibility and convenience are guaranteed.

The invention belongs to the technical field of ship lifesaving equipment, and discloses modular detachable high-bearing boat hanging frame equipment which comprises a base, a supporting frame, a rotating frame and a hanging assembly and further comprises a lubricating mechanism, the lubricating mechanism is arranged on the surface of the supporting frame, and the lubricating mechanism comprises a lubricating box fixedly connected to the surface of the supporting frame; an oil discharging pipe is fixedly installed on one side of the lubricating box, and one end of the oil discharging pipe penetrates through the supporting frame to make contact with the surface of the rotating frame. The discharged lubricating oil can flow to the joint between the supporting frame and the rotating frame to lubricate the supporting frame and the rotating frame, so that the rotating frame rotates more smoothly, finally, the driving assembly is driven to enable the sealing plate to increase the air pressure in the lubricating box, and then the lubricating oil flows to the joint between the supporting frame and the rotating frame; friction resistance at the connecting position is effectively reduced, it is guaranteed that the rotating frame is smooth and unobstructed when the lifeboat is hoisted, and the efficiency and reliability of hoisting operation are greatly improved.