Marine generator set hoisting tool
By designing lifting fixtures with adjustable bridge spacing and wire rope tension, the problems of limited applicability and insufficient stability of traditional lifting fixtures are solved, enabling flexible lifting and safe transportation of equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHENGXI SHIPYARD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional hoisting equipment cannot meet the hoisting needs under different working conditions. The contact between the wire rope and the equipment surface causes friction damage, and the uneven weight distribution of the equipment leads to unstable hoisting.
A hoisting fixture comprising a frame, a fixed frame, a suspension bridge, and a wire rope was designed. The connection structure driven by a handwheel allows for flexible adjustment of the suspension bridge spacing and the wire rope tension angle. Combined with support blocks and a spring structure, the fixture ensures stable hoisting of the equipment.
It improves the applicability and stability of hoisting, avoids friction damage between the wire rope and the equipment surface, and ensures the safety and stability of the equipment.
Smart Images
Figure CN121894528A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hoisting tooling technology, specifically to a hoisting tooling for marine generator sets. Background Technology
[0002] In the field of shipbuilding and repair, marine generator sets, as one of the core equipment of the ship's power system, play a crucial role in providing stable energy to the ship's electrical system. They are typically characterized by their large size and concentrated weight, with a single unit weighing anywhere from several tons to tens of tons. Moreover, their installation locations are often in complex areas with limited space, such as the ship's engine room. This makes the hoisting operation of these units a core part of the shipbuilding and subsequent repair process, directly affecting the shipbuilding cycle, repair efficiency, and operational safety.
[0003] In ship conversion and equipment upgrade projects, the hoisting of new heavy-duty generator sets within ship sections often faces challenges such as high equipment weight, lack of matching hoisting tools from the manufacturer, and the difficulty of balancing safety and quality assurance with existing hoisting solutions. Specific technical pain points and industry status quo are as follows: In a conversion project involving the addition of generator sets to the stern section of a certain vessel, the hoisting of three generator sets, each weighing 38 tons, was required. The hoisting points for these generator sets were located on both sides of a common base, totaling four points. Furthermore, the equipment manufacturer did not provide any dedicated hoisting tools, necessitating reliance on existing on-site resources or custom-made tools for hoisting. During this process, traditional hoisting solutions revealed significant shortcomings: On the one hand, traditional hoisting fixtures are mostly designed with fixed dimensions, which leads to obvious limitations in their applicability. They cannot be adapted to the actual on-site operation requirements, such as fine-tuning the spacing between hoisting points or adapting to slight differences in equipment size. As a result, the applicable scenarios for hoisting fixtures are narrow, making it difficult to flexibly cope with hoisting needs under different working conditions, and thus the applicable scope of hoisting fixtures is small. On the other hand, if the crane hook is directly connected to the common base lug of the generator set through four steel wire ropes, the steel wire rope will naturally form an angle during the stress process. This angle causes the steel wire rope to come into direct contact with the paint and related accessories of the generator set and generate friction and compression. This can easily cause paint scratches and accessory deformation and damage, which cannot meet the requirements of ship equipment installation for appearance quality and component integrity. As a result, the use effect of the lifting tool is not good. On the other hand, the generator set to be hoisted exhibits a significant uneven weight distribution: the diesel engine end, due to the integration of core heavy components such as the cylinder block and crankshaft, has a significantly higher weight proportion; the motor end, consisting only of the drive motor and small auxiliary structures, is significantly lighter, resulting in a substantial shift in the overall center of gravity towards the diesel engine side. During hoisting, this imbalance leads to severely uneven force distribution: the heavier diesel engine end will be in close contact with the hoisting equipment and bear full force, while the lighter motor end, due to insufficient load, is prone to gaps at the contact surface with the hoisting equipment, or even tilting upwards. This phenomenon not only causes concentrated stress points and localized overload on the hoisting equipment but also results in the equipment being constantly tilted and swaying during hoisting, making it impossible to maintain horizontal stability and greatly reducing the operational stability of the hoisting equipment, thus rendering the hoisting equipment unreliable.
[0004] Therefore, it is necessary to invent a hoisting tool for marine generator sets to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to provide a hoisting fixture for marine generator sets to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hoisting fixture for a marine generator set, comprising a frame, two fixed frames fixed at the upper end of the frame, a first steel wire rope knotted and fixed on both sides of the upper end of the two fixed frames, two top frames fixed at the lower end of the frame, a second steel wire rope passing through the two top frames, two upper fixed frames knotted and fixed at both ends of the two second steel wire ropes, a lifting bridge fixed at the lower end of each pair of upper fixed frames, a lower fixed frame fixed at both ends of the two lifting bridges, a third steel wire rope knotted and fixed at the lower end of the four lower fixed frames, a shackle knotted and fixed at the lower end of each third steel wire rope, and a pin threadedly connected to both ends of each shackle; The fixed frame has a rotating groove in the middle; the inner wall of the rotating groove is provided with a connecting structure; the connecting structure can rotate the two suspension bridges in opposite directions around the two top frames as the central axis, so as to drive the two suspension bridges to move in opposite directions to adapt to marine generator sets of different sizes.
[0007] Preferably, the connecting structure includes a rotating frame, a threaded rod fixed in the middle of the rotating frame, a handwheel fixed at the upper end of the threaded rod, a base fixed at the lower end of the threaded rod, a threaded bracket threaded to the outer surface of the threaded rod, a connecting bracket rotatably connected to both ends of the two threaded brackets, and a support bracket rotatably connected to the other end of the two connecting brackets.
[0008] Preferably, the outer surface of the rotating frame is rotatably connected to the inner wall of the rotating groove, the rotating groove passes through the middle of the frame, the cross section of the rotating groove is arranged in a cross shape, the middle part of the rotating frame is fixed to the upper side of the threaded rod, the outer surface of the threaded rod is rotatably connected to the inner wall of the rotating groove, the middle part of the handwheel is fixed to the upper end of the threaded rod, and the middle part of the chassis is fixed to the lower end of the threaded rod.
[0009] Preferably, the threaded bracket is threaded to the outer surface of the threaded rod in the middle, the cross section of the threaded bracket is cross-shaped, the two connecting brackets are rotatably connected at their near ends to one end of the threaded bracket, the two connecting brackets are rotatably connected at their far ends to the upper ends of the two support brackets, and the lower ends of the two support brackets are fixed to the middle of the upper side of the two suspension bridges.
[0010] Preferably, a support block is fixed to the middle of the lower side of each of the two suspension bridges, a support rod is fixed to the other end of each of the two support blocks, two connecting frames are rotatably connected to the outer surface of each of the two support rods, a driving ring is fixed to the near end of each of the four connecting frames, and a through hole is opened in the middle of each of the four driving rings.
[0011] Preferably, the upper ends of the two support blocks are fixed to the middle of the lower side of the two suspension bridges, the two support blocks are distributed in a cross pattern, and the vertical cross-section of each support block is Z-shaped. The lower ends of the two support blocks are fixed to the upper ends of the two support rods, and the vertical cross-section of the two support rods is T-shaped.
[0012] Preferably, the proximal ends of each pair of adjacent connecting frames are rotatably connected to the outer surfaces of two support rods, the disjoint ends of each pair of adjacent connecting frames are rotatably connected to the disjoint sides of four driving rings, each through hole passes through the middle of each driving ring, and the outer surfaces of the four third steel wire ropes are slidably connected to the inner walls of the four through holes.
[0013] Preferably, the other two ends of the threaded bracket are fixed with fixing plates, the lower sides of the two fixing plates are provided with sliding grooves, the inner walls of the two sliding grooves are slidably connected with sliding plates, the upper ends of the two sliding plates are fixed with springs, the lower ends of the two sliding plates are fixed with sliding rods, and the lower ends of the two sliding rods are fixed with rubber pads.
[0014] Preferably, the upper ends of the two fixed plates are fixed to the other two ends of the threaded frame, the two sliding grooves are opened through the lower side of the two fixed plates, the outer surfaces of the two sliding plates are slidably connected to the inner walls of the two sliding grooves, and the cross-section of each sliding plate is circular.
[0015] Preferably, the upper ends of the two springs are fixed to the inner walls of the upper sides of the two slide grooves, the lower ends of the two springs are fixed to the upper ends of the two slide plates, the upper ends of the two slide rods are fixed to the middle of the lower ends of the two slide plates, the lower ends of the two slide rods are fixed to the middle of the upper ends of the two rubber pads, and the outer surfaces of the two slide rods are slidably connected to the inner walls of the two slide grooves.
[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention uses manual rotation of the handwheel to perform rotational operation, so that the rotating groove, rotating frame, threaded rod, handwheel, chassis, threaded frame, connecting frame and support frame work together to achieve the effect of adaptive adjustment. It can be adjusted according to the actual needs of the hoisted generator set, thereby improving the applicability of the hoisting tool. (2) The present invention uses manual rotation of the handwheel to rotate the work, so that the support block, support rod, connecting frame, drive ring and through hole work together to achieve automatic unfolding. It can effectively avoid the problem of the steel wire rope naturally forming an angle under the force in traditional hoisting, and prevent the steel wire rope from directly contacting the paint and related accessories of the generator set to cause friction and squeezing, thereby reducing quality hazards such as paint scratches and accessory deformation and damage, and significantly improving the use effect of hoisting tooling; (3) The present invention uses manual rotation of the handwheel to rotate the operation, so that the fixed plate, slide, slide plate, spring, slide rod and rubber pad work together to achieve a stable hoisting effect. It effectively avoids the problem of insufficient contact between the light and heavy ends caused by uneven weight distribution of the equipment, so that both the light and heavy ends of the generator set can form reliable contact with the tooling, thereby significantly improving the stability of the hoisting tooling. Attached Figure Description
[0017] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a cross-sectional view of the frame of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure of section A in the middle; Figure 4 This is an overall bottom view of the present invention; Figure 5 This is a cross-sectional view of the fixing plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structure of section B in the middle; Figure 7 This is a schematic diagram of the suspension bridge structure of the present invention; Figure 8 This is a schematic diagram of the threaded frame structure of the present invention; Figure 9 This is a schematic diagram of the support block structure of the present invention; Figure 10 This is a partial structural diagram of the present invention.
[0018] In the diagram: 1. Frame; 2. Fixed frame; 3. First wire rope; 4. Top frame; 5. Second wire rope; 6. Upper fixed frame; 7. Suspension bridge; 8. Lower fixed frame; 9. Third wire rope; 10. Shackle; 11. Pin; 12. Rotary groove; 13. Rotating frame; 14. Threaded rod; 15. Handwheel; 16. Chassis; 17. Threaded frame; 18. Connecting frame; 19. Support frame; 20. Support block; 21. Support rod; 22. Connecting frame; 23. Drive ring; 24. Through hole; 25. Fixed plate; 26. Slide groove; 27. Slide plate; 28. Spring; 29. Slide rod; 30. Rubber pad. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Example 1 This embodiment provides a hoisting tool for a marine generator set; Please see Figure 1 - Figure 10As shown, the system includes a frame 1. Two fixed frames 2 are fixed to the upper end of the frame 1. First steel wire ropes 3 are knotted and fixed to both sides of the upper end of each fixed frame 2. Two top frames 4 are fixed to the lower end of the frame 1. Second steel wire ropes 5 pass through each top frame 4. Two upper fixed frames 6 are knotted and fixed to the ends of each of the two second steel wire ropes 5. One suspension bridge 7 is fixed to the lower end of each pair of upper fixed frames 6. Lower fixed frames 8 are fixed to the lower sides of both ends of each pair of suspension bridges 7. Third steel wire ropes 9 are knotted and fixed to the lower ends of all four lower fixed frames 8. A shackle 10 is knotted and fixed to the lower end of each third steel wire rope 9. Each shackle 10 has two knots. Each end is threaded with a pin 11; a rotating groove 12 is provided in the middle of the fixed frame 2; a connecting structure is provided on the inner wall of the rotating groove 12; the connecting structure includes a rotating frame 13, a threaded rod 14 is fixed in the middle of the rotating frame 13, a handwheel 15 is fixed at the upper end of the threaded rod 14, a base 16 is fixed at the lower end of the threaded rod 14, and a threaded bracket 17 is threadedly connected to the outer surface of the threaded rod 14. Two threaded brackets 17 are rotatably connected to two connecting brackets 18 at both ends, and two supporting brackets 19 are rotatably connected to the other end of each connecting bracket 18. The connecting brackets 18, driven by the threaded brackets 17, drive the two connecting brackets 18 through the supporting brackets 19. The suspension bridge 7 moves in the reverse direction to accommodate engine units of different sizes. During the reverse adjustment of the suspension bridge 7, the upper fixing frames 6 fixed at both ends will change their spacing synchronously with the suspension bridge 7. The second steel wire rope 5 wound on the upper fixing frame 6 will maintain a stable tension under the support of the top frame 4, preventing the steel wire rope from becoming slack or overly taut due to the movement of the suspension bridge 7. This ensures that the suspension bridge 7 maintains a horizontal posture throughout the adjustment process, providing a stable support foundation for subsequent hoisting. At the same time, the positions of the hanging points on the lower sides of the two suspension bridges 7 used to connect the third steel wire rope 9 will adjust synchronously with the reverse movement of the suspension bridge 7. When dealing with larger engine units, the increased spacing of the suspension bridge 7 allows for a wider distribution of lifting points on the equipment. For smaller engine units, the reduced spacing of the suspension bridge 7 enables precise alignment of the wire rope with the lifting lugs, eliminating the need to change lifting tools or adjust the crane position. This design, which adapts synchronously with the movement of the suspension bridge 7, not only eliminates the cumbersome process of disassembling and reassembling traditional tooling but also avoids the risk of lifting offset due to misalignment of lifting points. This allows the same set of tooling to flexibly meet the lifting needs of engine units of different lengths and with different lifting point spacings, significantly improving the versatility and operational efficiency of the tooling.
[0021] Please refer to it again. Figure 1 - Figure 10As shown, the outer surface of the rotating frame 13 is rotatably connected to the inner wall of the rotating groove 12, which runs through the middle of the frame 1. The rotating groove 12 has a cross-shaped cross section. The middle of the rotating frame 13 is fixed to the upper side of the threaded rod 14. The outer surface of the threaded rod 14 is rotatably connected to the inner wall of the rotating groove 12. The middle of the handwheel 15 is fixed to the upper end of the threaded rod 14. The middle of the chassis 16 is fixed to the lower end of the threaded rod 14. The middle of the threaded frame 17 is threadedly connected to the outer surface of the threaded rod 14. The cross section of the threaded frame 17 has a cross-shaped cross section. The near ends of the two connecting frames 18 are rotatably connected to the two ends of the threaded frame 17. The far ends of the two connecting frames 18 are rotatably connected to the upper ends of the two support frames 19. The lower ends of the two support frames 19 are fixed to the middle of the upper side of the two suspension bridges 7.
[0022] The specific implementation process is as follows: The handwheel 15 is manually rotated, causing the threaded rod 14, fixedly connected to the middle of the handwheel 15, to rotate synchronously. At this time, the rotating frame 13 fixed to the upper side of the threaded rod 14 maintains stable rotation under the limiting effect of the rotating groove 12 opened in the middle of the frame 1, thereby driving the threaded rod 14 fixed thereto to rotate synchronously and stably under the constraint of the rotating groove 12. The stably rotating threaded rod 14 drives the base 16 fixed at its lower end to rotate, and on the other hand, through threaded transmission, drives the threaded frame 17 connected to the threaded surface to move. The movement trajectory of the threaded frame 17 is limited by the two connecting frames 18 rotatably connected at both ends. Under the traction of the moving threaded frame 17, the two connecting frames 18, through the two support frames 19 rotatably connected at their other ends, drive the suspension bridge 7 to move: causing the upper fixing frame 6 fixed to the upper sides of both ends of the two suspension bridges 7 to reverse and flip under the cooperation of the second steel wire rope 5 wound on it and supported by the two top frames 4. Ultimately, the two reverse-flipped suspension bridges 7 move away from each other, achieving adaptive adjustment of the tooling and realizing the effect of adaptive adjustment. According to the actual needs of the generator set being hoisted, corresponding adjustment operations can be carried out, thereby improving the applicability of the hoisting tooling.
[0023] Example 2 Please see Figure 1 - Figure 10 As shown, an automatic unfolding function has been added based on Embodiment 1; Please refer to it again. Figure 1 - Figure 10As shown, support blocks 20 are fixed to the middle of the lower side of both suspension bridges 7, and support rods 21 are fixed to the other end of both support blocks 20. Two connecting frames 22 are rotatably connected to the outer surface of both support rods 21. A driving ring 23 is fixed to the near end of each of the four connecting frames 22. A through hole 24 is opened in the middle of each of the four driving rings 23. The upper ends of the two support blocks 20 are fixed to the middle of the lower side of the two suspension bridges 7. The two support blocks 20 are distributed in a cross pattern. The vertical section of each support block 20 is Z-shaped. The lower ends of the two support blocks 20 are fixed to the upper ends of the two support rods 21. The vertical section of the two support rods 21 is T-shaped. The configuration is as follows: the near ends of every two adjacent connecting frames 22 are rotatably connected to the outer surfaces of two support rods 21, and the far ends of every two adjacent connecting frames 22 are rotatably connected to the far sides of four driving coils 23. Each through hole 24 passes through the middle of each driving coil 23. The outer surfaces of four third steel wire ropes 9 are slidably connected to the inner walls of the four through holes 24. When the suspension bridge 7 moves, it drives the support blocks 20 to move. Because the two support blocks 20 adopt a cross-type design, when the suspension bridge 7 unfolds in opposite directions to both sides, the upper end of the support block 20 separates synchronously with the suspension bridge 7, while the lower end gradually approaches under the cross-type movement trajectory. This causes the support rod 21 fixed at the lower end of the support block 20 to close synchronously. The four connecting frames 22 rotatably connected to the outer surface of the support rod 21 expand outward with the support rod 21 as the axis. This, in turn, pushes the drive ring 23 fixed at the near end of the connecting frame 22 to expand radially under the limit of the through hole 24. At this time, the third steel wire rope 9 passing through the drive ring 23 is evenly spread out, forming an angle that matches the current spacing of the suspension bridge 7. This avoids the steel wire rope from contacting and rubbing against the surface of the generator set due to excessive contraction, and ensures that the force on each suspension point is balanced through a stable angle distribution. When the suspension bridge 7 moves inward towards each other... When adapted to a small generator set, the lower end of the support block 20 separates synchronously, causing the support rod 21, connecting frame 22 and driving ring 23 to move in the opposite direction, so that the third wire rope 9 naturally tightens to the appropriate compact angle, always maintaining precise docking with the equipment lifting point. This support structure, which moves synchronously with the suspension bridge 7, realizes the automated coordination of the suspension bridge 7 spacing adjustment and the wire rope tension angle adaptation. It can complete the full matching of tooling and generator sets of different sizes without additional operation, which simplifies the adjustment process and further ensures the safety of equipment during the lifting process through precise control of the wire rope tension angle.
[0024] The specific implementation process is as follows: The handwheel 15 is manually rotated, causing the threaded rod 14, fixed in the middle of the handwheel 15, to rotate synchronously. The threaded frame 17, whose outer surface is threadedly connected, is displaced under the action of the threaded transmission. This displacement is achieved through the connecting frame 18, which rotates at both ends, driving the support frame 19 to move, ultimately causing the two suspension bridges 7 to move away from each other. During this process, the support blocks 20, fixed in the middle of the lower side of the two suspension bridges 7, move away from each other synchronously with the suspension bridges 7. However, due to the cross-arranged structure of the two support blocks 20, when the suspension bridges 7 move the lower support blocks 20 away from each other, the lower ends of the two support blocks 20 actually form a trajectory that moves closer to each other. Two support blocks 20 approaching each other cause their lower fixed support rods 21 to approach synchronously. The four connecting frames 22 rotatably connected to the outer surface of the support rods 21 move in tandem, causing the driving rings 23 fixed at the near ends of the four connecting frames 22 to form a radial expansion effect on the third steel wire rope 9 passing through the through hole 24 under the limiting cooperation, thus achieving the effect of automatic unfolding. This can effectively avoid the problem of the steel wire rope naturally forming an angle under the force in traditional hoisting, and prevent the steel wire rope from directly contacting the paint and related accessories of the generator set to cause friction and squeezing, thereby reducing quality hazards such as paint scratches and accessory deformation and damage, and significantly improving the use effect of hoisting tools.
[0025] Example 3 Please see Figure 1 - Figure 10 As shown, a stable lifting function has been added based on Embodiment 1; Please refer to it again. Figure 1 - Figure 10 As shown, the threaded bracket 17 has fixing plates 25 at both ends. Each fixing plate 25 has a groove 26 on its lower side. Slide plates 27 are slidably connected to the inner walls of each groove 26. Springs 28 are fixed to the upper ends of each slide plate 27, and slide rods 29 are fixed to the lower ends of each slide plate 27. Rubber pads 30 are fixed to the lower ends of each slide rod 29. The upper ends of the two fixing plates 25 are fixed to the other ends of the threaded bracket 17. The two grooves 26 extend through the lower sides of the two fixing plates 25. The outer surfaces of the two slide plates 27 are slidably connected to the inner walls of the two grooves 26. Each slide plate 27 has a circular cross-section. The upper ends of the two springs 28 are fixed to the upper inner walls of the two grooves 26, and the lower ends of the two springs 28 are fixed to the upper ends of the two slide plates 27. The upper ends of the two slide rods 29 are fixed to the middle of the lower ends of the two slide plates 27, and the lower ends of the two slide rods 29 are fixed to the middle of the upper ends of the two rubber pads 30. The outer surfaces of the two slide rods 29 are slidably connected to the inner walls of the two grooves 26.
[0026] The specific implementation process is as follows: The handwheel 15 is rotated manually to perform the rotation operation, and the threaded rod 14, which is fixedly connected to the middle of the handwheel 15, rotates synchronously with it; the threaded frame 17, which is threadedly connected to the outer surface of the threaded rod 14, is displaced by the threaded transmission action, and the displacement trajectory is limited and constrained by the connecting frame 18 connected to both ends of the threaded frame 17 to ensure the stable movement of the threaded frame 17. The moving threaded frame 17 synchronously drives the fixed plates 25 fixed at both ends to move in the same direction. The sliding plate 27, which is slidably engaged with the inner wall of the groove 26 at the lower end of the fixed plate 25, moves synchronously with the fixed plate 25, thereby causing the sliding rod 29 fixed on the sliding plate 27 and the rubber pad 30 fixed at the other end of the sliding rod 29 to move synchronously. During the movement, the rubber pad 30 first achieves flexible contact with the surface of the generator set and maintains an initial equilibrium state under the reaction force of the generator set; as the fixed plate 25 continues to move downward, the spring 28 fixed in the groove 26 is compressed under the support of the sliding plate 27, thereby generating a reverse elastic force. During the subsequent hoisting process, the flexible contact characteristics of the rubber pad 30 and the elastic support of the spring 28 work together to form a flexible compression fixation on the generator set, ensuring that the generator set is firmly attached to the four third steel wire ropes 9, achieving a stable hoisting effect. This effectively avoids the problem of insufficient contact at both ends due to uneven weight distribution of the equipment, allowing both ends of the generator set to make reliable contact with the tooling, thereby significantly improving the stability of the hoisting tooling.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hoisting fixture for a marine generator set, comprising a frame (1), characterized in that: The frame (1) has two fixed frames (2) fixed at the upper end. The two fixed frames (2) are fixed with first steel wire ropes (3) tied on both sides at the upper end. The frame (1) has two top frames (4) fixed at the lower end. The two top frames (4) have second steel wire ropes (5) passing through them. The two second steel wire ropes (5) are fixed with two upper fixed frames (6) tied at both ends. Each pair of upper fixed frames (6) has one suspension bridge (7) fixed at the lower end. The two suspension bridges (7) have lower fixed frames (8) fixed at both ends. The four lower fixed frames (8) have third steel wire ropes (9) tied at the lower end. Each third steel wire rope (9) has a shackle (10) tied at the lower end. Each shackle (10) has a pin (11) threaded to both ends. The fixed frame (2) has a rotating groove (12) in the middle; the inner wall of the rotating groove (12) is provided with a connecting structure; the connecting structure can carry the two suspension bridges (7) to rotate in the opposite direction with the two top frames (4) as the central axis, so as to drive the two suspension bridges (7) to move in the opposite direction, so as to adapt to marine generator sets of different sizes.
2. The hoisting fixture for a marine generator set according to claim 1, characterized in that: The connection structure includes a rotating frame (13), a threaded rod (14) fixed in the middle of the rotating frame (13), a handwheel (15) fixed at the upper end of the threaded rod (14), a base plate (16) fixed at the lower end of the threaded rod (14), a threaded bracket (17) threadedly connected to the outer surface of the threaded rod (14), a connecting bracket (18) rotatably connected to both ends of the two threaded brackets (17), and a support bracket (19) rotatably connected to the other end of the two connecting brackets (18).
3. The hoisting fixture for a marine generator set according to claim 2, characterized in that: The outer surface of the rotating frame (13) is rotatably connected to the inner wall of the rotating groove (12). The rotating groove (12) passes through the middle of the frame (1). The cross section of the rotating groove (12) is arranged in a cross shape. The middle part of the rotating frame (13) is fixed to the upper side of the threaded rod (14). The outer surface of the threaded rod (14) is rotatably connected to the inner wall of the rotating groove (12). The middle part of the handwheel (15) is fixed to the upper end of the threaded rod (14). The middle part of the chassis (16) is fixed to the lower end of the threaded rod (14).
4. The hoisting fixture for a marine generator set according to claim 2, characterized in that: The threaded frame (17) is threaded to the outer surface of the threaded rod (14) in the middle. The cross section of the threaded frame (17) is cross-shaped. The two connecting frames (18) are rotatably connected at their near ends to the two ends of the threaded frame (17). The two connecting frames (18) are rotatably connected at their far ends to the upper ends of the two support frames (19). The lower ends of the two support frames (19) are fixed to the middle of the upper side of the two suspension bridges (7).
5. The hoisting fixture for a marine generator set according to claim 1, characterized in that: A support block (20) is fixed to the middle of the lower side of each of the two suspension bridges (7). A support rod (21) is fixed to the other end of each of the two support blocks (20). Two connecting frames (22) are rotatably connected to the outer surface of each of the two support rods (21). A drive ring (23) is fixed to the near end of each of the four connecting frames (22). A through hole (24) is opened in the middle of each of the four drive rings (23).
6. The hoisting fixture for a marine generator set according to claim 5, characterized in that: The upper ends of the two support blocks (20) are fixed to the middle of the lower side of the two suspension bridges (7). The two support blocks (20) are distributed in a cross pattern. The vertical cross-section of each support block (20) is Z-shaped. The lower ends of the two support blocks (20) are fixed to the upper ends of the two support rods (21). The vertical cross-section of the two support rods (21) is T-shaped.
7. The hoisting fixture for a marine generator set according to claim 5, characterized in that: Each pair of adjacent connecting frames (22) is rotatably connected to the outer surface of two support rods (21) at their near ends, and each pair of adjacent connecting frames (22) is rotatably connected to the opposite sides of four driving rings (23). Each through hole (24) passes through the middle of each driving ring (23), and the outer surfaces of the four third wire ropes (9) are slidably connected to the inner walls of the four through holes (24).
8. The hoisting fixture for a marine generator set according to claim 2, characterized in that: The threaded bracket (17) has fixed plates (25) at both ends. The two fixed plates (25) have grooves (26) on their lower sides. The inner walls of the two grooves (26) are slidably connected to slide plates (27). The upper ends of the two slide plates (27) are fixed with springs (28). The lower ends of the two slide plates (27) are fixed with slide rods (29). The lower ends of the two slide rods (29) are fixed with rubber pads (30).
9. A hoisting fixture for a marine generator set according to claim 8, characterized in that: The upper ends of the two fixed plates (25) are fixed to the other two ends of the threaded frame (17), and the two slide grooves (26) are opened through the lower side of the two fixed plates (25). The outer surfaces of the two slide plates (27) are slidably connected to the inner walls of the two slide grooves (26), and the cross-section of each slide plate (27) is circular.
10. A hoisting fixture for a marine generator set according to claim 8, characterized in that: The upper ends of the two springs (28) are fixed to the inner walls of the two slide grooves (26), the lower ends of the two springs (28) are fixed to the upper ends of the two slide plates (27), the upper ends of the two slide rods (29) are fixed to the middle of the lower ends of the two slide plates (27), the lower ends of the two slide rods (29) are fixed to the middle of the upper ends of the two rubber pads (30), and the outer surfaces of the two slide rods (29) are slidably connected to the inner walls of the two slide grooves (26).