Hoisting device for ship shaft sleeve

Abstract

The invention provides a hoisting device for a ship shaft sleeve. The hoisting device comprises a conveying rail mechanism, a sliding hoisting mechanism and an auxiliary supporting mechanism. The conveying track mechanism comprises a first fastening bolt, a special-shaped connecting lock catch and a steel cable; the special-shaped connecting lock catches are arranged at the starting point and the terminal point of the conveying rail mechanism correspondingly and used for being connected with a reinforcing structure on the inner wall of a cabin. The steel cable is connected between the special-shaped connecting lock catches and arranged in the length direction of the conveying rail mechanism. The sliding hoisting mechanism comprises two sliding pieces, and hoisting rings are arranged at the bottoms of the sliding pieces and used for being connected with ship shaft sleeves. The auxiliary supporting mechanism provides auxiliary supporting force for the ship shaft sleeve in the installation process. The ship shaft sleeve can be rapidly and accurately installed, the installation time is saved, the freezing effect is guaranteed, and therefore the installation precision of the ship shaft sleeve can be guaranteed; the situation that temporary hanging weights are welded for hoisting and lightering is avoided; and the building quality and the building period of the ship are improved.

Description

Technical Field

[0001] The present application relates to the technical field of shipbuilding, and in particular to a hoisting device for a ship shaft sleeve. Background Art

[0002] When assembling large ship shaft sleeves, they need to be frozen with liquid nitrogen before assembly. As shown in the figure, usually, some ship shaft sleeves are assembled from the outside of the hull to the inside. At this time, the external space is large during installation, various auxiliary equipment can be well coordinated, and there is ample installation time, so the installation can be completed smoothly while the ship shaft sleeve remains frozen.

[0003] However, some ship shaft sleeves are assembled from the hull, which will be affected by the ship equipment, resulting in the problem of installation space limitation, so that the ship shaft sleeves cannot be frozen and installed in the ship. They can only be transported to the cabin for installation after being frozen outside the ship. The freezing effect of liquid nitrogen can be maintained within 30 minutes, otherwise the size of the ship shaft sleeve will change, making it impossible to install. Therefore, the installation time of the ship shaft sleeve is limited. In addition, the ship's tail shaft cabin is small and has many internal equipment accessories. When installing temporary lifting equipment by welding, there are great safety hazards. And the welding of temporary lifting equipment by welding requires a lot of manpower, and it will be dismantled later.

[0004] In summary, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a lifting device for a ship shaft sleeve, which can quickly and accurately install the shaft sleeve of a large ship.

[0006] The present application specifically provides a lifting device for a ship shaft sleeve, comprising:

[0007] The conveying track mechanism comprises a first fastening bolt, a special-shaped connection lock buckle and a steel cable; the special-shaped connection lock buckle is respectively arranged at the starting point and the end point of the conveying track mechanism, and is used to connect with the reinforcement structure on the inner wall of the cabin; the first fastening bolt is arranged at the opening of the special-shaped connection lock buckle, and is used to fix the special-shaped connection lock buckle with the reinforcement structure on the inner wall of the cabin; the steel cable is connected between the special-shaped connection lock buckles and arranged along the length direction of the conveying track mechanism;

[0008] The sliding hoisting mechanism is slidably connected to the steel cable and slides along the steel cable, and comprises two sliding members, each of which comprises a U-shaped connecting frame with an opening at the bottom, a pulley is arranged in the U-shaped connecting frame, and the pulley is rotatably connected to the U-shaped connecting frame through a second fastening bolt; a lifting ring is arranged at the bottom of the sliding member, and the lifting ring is used to be connected to the ship shaft sleeve;

[0009] The auxiliary support mechanism is arranged at the installation position of the ship shaft sleeve. The top surface of the auxiliary support mechanism is configured with a support surface, and the support surface is used to provide auxiliary support force for the ship shaft sleeve during the installation process.

[0010] In one practicable manner, grooves are provided on the outer surface of the pulley.

[0011] In one practicable manner, the two sliding members are fixedly connected via a connecting plate.

[0012] In an practicable manner, each of the lifting rings is provided with a lifting hoist, and the lifting hoist is used for fixed connection with a ship shaft sleeve.

[0013] In an practicable manner, a stopper is provided on the U-shaped connecting frame, the stopper is sleeved on the steel cable, and is fixedly connected to the top of the sliding lifting mechanism.

[0014] In one implementable manner, the stop member includes an upper stop plate and a lower stop plate, a stop area is formed between the lower surface of the upper stop plate and the upper surface of the lower stop plate, the steel cable passes through the stop area, a U-shaped frame is hinged on the lower stop plate, the lower part of the U-shaped frame is open, the U-shaped frame can be rotated upward so that the U-shaped frame cover is set on the upper stop plate; a locking bolt is set on the top of the U-shaped frame, and the locking bolt is rotated downward so that the locking bolt is pressed downward against the upper stop plate.

[0015] In one practicable manner, the auxiliary support mechanism includes a base, and a scissors-type structure is arranged on the upper surface of the base. The scissors-type structure includes two cross-arranged second connecting rods, and the intersection of the two second connecting rods is hinged; a slider is hinged to the bottom of each second connecting rod, and the bottom of each slider is slidably connected to the base.

[0016] In one feasible manner, two positioning plates are fixedly connected to the base, the positioning plates are arranged vertically, a slide groove is set between the two positioning plates, the slider is set in the slide groove and slides along the length direction of the slide groove; the auxiliary support mechanism also includes an adjusting screw, the adjusting screw passes through the positioning plate and the slider, and the adjusting screw is threadedly connected to the positioning plate and the slider respectively.

[0017] In an operative manner, a fixing frame is provided on the top of the two second connecting rods, the fixing frame is arranged horizontally, two parallel guide wheels are provided on the fixing frame, and the area between the axes of the two guide wheels is a supporting surface for placing the ship shaft sleeve.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] The technical solution of the present application has a simple structure and is easy to operate. It can complete the rapid and accurate installation of the ship's shaft sleeve, save installation time, and ensure the freezing effect, thereby ensuring the installation accuracy of the ship's shaft sleeve; it avoids the situation of welding temporary lifting codes for lifting and transshipment, thereby ensuring construction safety; therefore, the present application can save a lot of manpower and material resources, and improve the quality and construction period of ship construction.

[0020] Through the setting of the conveying track mechanism, it can be quickly connected with the ship reinforcement and avoid the situation of welding temporary lifting codes for lifting and transshipment, thus ensuring construction safety and avoiding damage to the ship structure.

[0021] By setting up the sliding hoisting mechanism, the ship shaft sleeve can be transported without damage.

[0022] By setting up the auxiliary support mechanism, the installation of the ship shaft sleeve can be assisted, and auxiliary support force can be provided for the ship shaft sleeve to ensure the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a ship shaft sleeve in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0024] Figure 2 It is a structural schematic diagram of a conveying track mechanism in a hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the assembly of a conveying track mechanism in a hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0026] Figure 4 It is a structural schematic diagram of a sliding member in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0027] Figure 5 It is a structural schematic diagram of a pulley in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0028] Figure 6 It is a structural schematic diagram of a connecting plate in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0029] Figure 7 The figure is a schematic diagram of the assembly of a stopper in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0030] Figure 8 The invention is a schematic structural diagram of a stopper in a lifting device for a ship shaft sleeve according to an embodiment of the present invention.

[0031] Fig. 9 It is another structural schematic diagram of a stopper in the hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0032] Fig.10 It is a front view of an auxiliary supporting mechanism in a hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0033] Fig.11 It is a side view of an auxiliary support mechanism in a hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0034] Fig.12 It is a schematic diagram of the arrangement structure of three sets of sliding hoisting mechanisms in the hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0035] Fig.13 It is a schematic diagram of hoisting of an auxiliary supporting mechanism in a hoisting device for a ship shaft sleeve according to an embodiment of the present invention.

[0036] Fig.14 The present invention is a schematic diagram of the hoisting of a ship shaft sleeve in the hoisting device of the ship shaft sleeve according to an embodiment of the present invention.

[0037] The reference numerals are described as follows:

[0038] 1. Ship shaft sleeve; 2. Sliding part; 3. Connecting plate; 4. Quick release bolt; 5. Turnbuckle bolt; 6. Strengthening structure; 7. Lifting hoist; 8. Special-shaped connecting lock buckle; 9. Shackle; 10. Steel cable; 11. First fastening bolt; 12. U-shaped connecting frame; 13. Pulley; 14. Second fastening bolt; 15. Lifting ring; 16. Stopper; 161. Upper stop plate; 162. Lower stop plate; 163. U-shaped frame; 164. Locking bolt; 165. First connecting rod; 17. Base; 18. Second connecting rod; 19. Sliding block; 20. Positioning plate; 21. Adjusting screw; 22. Second handle; 23. Fixed frame; 24. Guide wheel; 25. Lifting ear; 26. Stern tube; 27. Angle ruler. DETAILED DESCRIPTION

[0039] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0043] See also Figure 1 The present application provides a lifting device for a ship shaft sleeve, comprising:

[0044] The conveying track mechanism is used for fixed connection with the reinforcement structure 6 on the inner wall of the cabin, and comprises a first fastening bolt 11, a special-shaped connection lock buckle 8 and a steel cable 10; the special-shaped connection lock buckle 8 is respectively arranged at the starting point and the end point of the conveying track mechanism, and is used for connecting with the reinforcement structure 6 on the inner wall of the cabin; the first fastening bolt 11 is arranged at the opening of the special-shaped connection lock buckle 8, and is used for fixed connection between the special-shaped connection lock buckle 8 and the reinforcement structure 6 on the inner wall of the cabin; the steel cable 10 is connected between the special-shaped connection lock buckles 8 and is arranged along the length direction of the conveying track mechanism.

[0045] It should be noted that the steel cable 10 is connected to the special-shaped connecting lock buckle 8 via a shackle 9 .

[0046] The sliding hoisting mechanism is slidably connected to the steel cable 10 and slides along the steel cable 10, and includes two sliding members 2, each of which includes a U-shaped connecting frame 12 with an opening at the bottom, a pulley 13 is arranged in the U-shaped connecting frame 12, and the pulley 13 is rotatably connected to the U-shaped connecting frame 12 through a second fastening bolt 14; a lifting ring 15 is arranged at the bottom of the sliding member 2, and the lifting ring 15 is used to connect with the ship shaft sleeve 1. The ship shaft sleeve 1 is transported to a predetermined position for installation through the sliding hoisting mechanism.

[0047] Specifically, as shown in the figure, the second fastening bolt 14 passes through the U-shaped connecting frame 12 and the pulley 13 at the same time, so that the pulley 13 is rotatably connected in the U-shaped connecting frame 12.

[0048] The auxiliary support mechanism is arranged at the installation location of the ship shaft sleeve 1 , and the top surface of the auxiliary support mechanism is configured with a support surface, and the support surface is used to provide auxiliary support force for the ship shaft sleeve 1 during the installation process.

[0049] In an practicable manner, a turnbuckle 5 is provided on the steel cable 10, and the steel cable 10 can be quickly tightened by the turnbuckle 5 to ensure the smoothness of the sliding member 2 during the sliding process. The turnbuckle 5 is connected to the steel cable 10 by a quick-release bolt 4 to improve the disassembly efficiency of the track conveying mechanism.

[0050] In one practicable manner, a groove is provided on the outer surface of the pulley 13, and during the sliding process of the pulley 13, the steel cable 10 is stuck in the groove to prevent it from sliding out, thereby limiting the sliding trajectory of the pulley 13 and ensuring the stability of the operation of the pulley 13.

[0051] In one feasible manner, the two sliding members 2 are fixedly connected via a connecting plate 3, and the connecting plate 3 is respectively fixedly connected to the tops of the two U-shaped connecting frames 12 to increase the stability of the sliding lifting mechanism during the transportation process. By setting the connecting plate 3, the distance between the two sliding members 2 is fixed to prevent one sliding member 2 from sliding too fast or too slow and affecting the movement of the other sliding member 2, thereby improving the stability during the sliding process.

[0052] In an practicable manner, each of the lifting rings 15 is provided with a lifting hoist 7, and the lifting hoist 7 is used to be fixedly connected to the ship shaft sleeve 1. Through the provision of the lifting hoist 7, the ship shaft sleeve 1 can be installed by descending, and the height of the ship shaft sleeve 1 can be adjusted by ascending to meet the installation requirements of different heights.

[0053] It should be noted that the connection end of the hoisting hoist 7 can be connected to the shaft sleeve lifting ring 15 on the ship shaft sleeve 1, and the ship shaft sleeve 1 can also be lifted by wrapping a strap around the circumference of the shaft sleeve.

[0054] In one practicable manner, as shown in the figure, a stopper 16 is provided on the U-shaped connecting frame 12, and the stopper 16 is sleeved on the steel cable 10 and fixedly connected to the top of the sliding hoisting mechanism.

[0055] In an operative manner, as shown in the figure, the stopper 16 comprises an upper stopper plate 161 and a lower stopper plate 162, a stopper area is formed between the lower surface of the upper stopper plate 161 and the upper surface of the lower stopper plate 162, and the steel cable 10 is arranged through the stopper area. A U-shaped frame 163 is hinged on the lower stopper plate 162, the lower part of the U-shaped frame 163 is open, and the opening is hinged to the lower stopper plate 162; the U-shaped frame 163 is rotated upward so that the U-shaped frame 163 is covered on the upper stopper plate 161; a locking bolt 164 is arranged on the top of the U-shaped frame 163, and the locking bolt 164 is rotated downward so that the locking bolt 164 is pressed downward against the upper stopper plate 161, so that the upper stopper plate 161 and the lower stopper plate 162 simultaneously press the steel cable 10, so that the position of the sliding member 2 on the steel cable 10 remains fixed.

[0056] In one practicable manner, the upper stop plate 161 and the lower stop plate 162 are connected via a first connecting rod 165 , one end of the first connecting rod 165 is hinged to the upper stop plate 161 , and the other end of the first connecting rod 165 is hinged to the lower stop plate 162 .

[0057] It should be noted that, during the sliding process of the sliding hoisting mechanism, the U-shaped frame 163 is in an open state so that the stopper 16 moves with the U-shaped connecting frame 12. When the sliding hoisting mechanism slides to a predetermined position, the U-shaped frame 163 is rotated upward so that the top of the U-shaped frame 163 is buckled on the top of the first connecting rod 165, and the U-shaped frame 163 and the first connecting rod 165 are arranged to intersect each other to pre-tighten the upper stopper plate 161, and then further tightened by the locking bolt 164.

[0058] In one practicable manner, a rubber layer is provided on the lower surface of the upper stop plate 161 and the upper surface of the lower stop plate 162 to increase the friction between the upper stop plate 161 and the steel cable 10 .

[0059] In one practicable manner, a first handle is provided at the end of the fastening bolt, and the fastening bolt is rotated by the first handle for easy operation.

[0060] In an practicable manner, the auxiliary support mechanism includes a base 17, and a scissors structure is provided on the upper surface of the base 17. The top surface height of the auxiliary support mechanism is adjusted by adjusting the crossing angle of the scissors structure.

[0061] In an operative manner, the scissor structure includes two cross-arranged second connecting rods 18, and the intersection of the two second connecting rods 18 is hinged. A slider 19 is hinged at the bottom of each of the second connecting rods 18, and the bottom of each slider 19 is slidably connected to the base 17. The height of the scissor structure is adjusted by adjusting the distance between the two sliders.

[0062] In an operative manner, two positioning plates 20 are fixedly connected to the base 17, the positioning plates 20 are arranged vertically, and the slider 19 is disposed between the two positioning plates 20. The auxiliary support mechanism further includes an adjusting screw 21, the adjusting screw 21 passes through the positioning plates 20 and the slider 19, and the adjusting screw 21 is connected to the positioning plates 20 and the slider 19 through threads. By rotating the adjusting screw 21, the distance between the two sliders 19 is adjusted to adjust the height of the auxiliary support mechanism.

[0063] In an practicable manner, a slide groove is provided between the two positioning plates 20 , and the slider 19 slides along the length direction of the slide groove.

[0064] It should be noted that the adjusting screw 21 is provided with two sections of threads, which are arranged opposite to each other. By rotating the adjusting screw 21 forward or reversely, the two sliders 19 can slide inward or outward at the same time.

[0065] In an practicable manner, a second handle 22 is provided at the end of the adjusting screw 21 , and the rotation of the adjusting screw 21 is controlled by rotating the second handle 22 , so as to facilitate operation.

[0066] In an practicable manner, a fixing frame 23 is disposed on the top of the second connecting rod 18, two guide wheels 24 are disposed on the top of the fixing frame 23, and the area between the axes of the two guide wheels 24 is a support surface for placing the ship shaft sleeve 1. The arc support surface formed by the guide wheels 24 avoids damage to the ship shaft sleeve 1.

[0067] In an practicable manner, lifting ears 25 are provided at both ends of the base 17 , and the auxiliary support mechanism is lifted to a predetermined position through the lifting ears 25 .

[0068] In this embodiment, the following contents are also provided when hoisting the ship shaft sleeve 1 in the stern shaft compartment:

[0069] S1. Cut off the deck on the top of the escape hatch to form a lifting opening, and lift the frozen ship shaft sleeve 1 into the stern shaft cabin through the lifting opening.

[0070] S2. A bulb flat steel is provided on the ship structure plate of the stern shaft cabin as a reinforcement structure 6 of the ship, a special-shaped connection lock buckle 8 is sleeved on the end of the bulb flat steel, and the special-shaped connection lock buckle 8 is fastened to the bulb flat steel by a first fastening bolt 11.

[0071] It should be noted that step S2 also includes: tightening the steel cable 10 by rotating the turnbuckle bolt 5 .

[0072] S3. Three sets of sliding hoisting mechanisms are arranged in the stern shaft compartment, as shown in the figure, of which two sets of sliding hoisting mechanisms are respectively arranged on the port side and the starboard side of the ship and arranged along the centerline of the ship; the other set is arranged perpendicularly to the other two sets, and is used to transfer the ship shaft sleeve 1 from the port side to the starboard side.

[0073] S4, firstly transport the auxiliary support mechanism to the stern tube 26 through the sliding hoisting mechanism, then transport the ship shaft sleeve 1 to the predetermined position through the sliding hoisting mechanism, fix the position of the ship shaft sleeve 1 through the stopper 16, so as to install the ship shaft sleeve 1.

[0074] It should be noted that step S4 also includes the following: determining the support surface height of the auxiliary support mechanism by using the angle ruler 27 , and adjusting the support surface height of the auxiliary support mechanism by using the adjusting screw 21 .

[0075] In summary, the present application has a simple structure and is easy to operate. It can complete the rapid and accurate installation of the ship shaft sleeve 1, save installation time, and ensure the freezing effect, thereby ensuring the installation accuracy of the ship shaft sleeve 1; it avoids the situation of welding temporary lifting codes for lifting and barging, thereby ensuring construction safety; therefore, the present application can save a lot of manpower and material resources, and improve the quality and construction cycle of ship construction. Through the setting of the conveying track mechanism, it can be quickly connected with the ship reinforcement, and avoid the situation of welding temporary lifting codes for lifting and barging, ensuring construction safety, and avoiding damage to the ship structure. Through the setting of the sliding lifting mechanism, the ship shaft sleeve 1 can be transported without damage. Through the setting of the auxiliary support mechanism, it can assist the installation of the ship shaft sleeve 1, provide auxiliary support force for the ship shaft sleeve 1, and ensure installation accuracy.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A lifting device for a ship shaft sleeve, characterized in that: include: The conveying track mechanism comprises a first fastening bolt, a special-shaped connection lock buckle and a steel cable; the special-shaped connection lock buckle is respectively arranged at the starting point and the end point of the conveying track mechanism, and is used to connect with the reinforcement structure on the inner wall of the cabin; the first fastening bolt is arranged at the opening of the special-shaped connection lock buckle, and is used to fix the special-shaped connection lock buckle with the reinforcement structure on the inner wall of the cabin; the steel cable is connected between the special-shaped connection lock buckles and arranged along the length direction of the conveying track mechanism; The sliding hoisting mechanism is slidably connected to the steel cable and slides along the steel cable, and comprises two sliding members, each of which comprises a U-shaped connecting frame with an opening at the bottom, a pulley is arranged in the U-shaped connecting frame, and the pulley is rotatably connected to the U-shaped connecting frame through a second fastening bolt; a lifting ring is arranged at the bottom of the sliding member, and the lifting ring is used to be connected to the ship shaft sleeve; The auxiliary support mechanism is arranged at the installation position of the ship shaft sleeve. The top surface of the auxiliary support mechanism is configured with a support surface, and the support surface is used to provide auxiliary support force for the ship shaft sleeve during the installation process.

2. The hoisting device for a ship shaft sleeve according to claim 1, characterized in that: A groove is arranged on the outer surface of the pulley.

3. The hoisting device for a ship shaft sleeve according to claim 1, characterized in that: The two sliding members are fixedly connected via a connecting plate.

4. The hoisting device for a ship shaft sleeve according to claim 1, characterized in that: Each lifting ring is provided with a lifting hoist, and the lifting hoist is used for fixed connection with the ship shaft sleeve.

5. The hoisting device for a ship shaft sleeve according to claim 1, characterized in that: A stopper is arranged on the U-shaped connecting frame, the stopper is sleeved on the steel cable and fixedly connected to the top of the sliding hoisting mechanism.

6. The hoisting device for a ship shaft sleeve according to claim 5, characterized in that: The stop member includes an upper stop plate and a lower stop plate, a stop area is formed between the lower surface of the upper stop plate and the upper surface of the lower stop plate, the steel cable passes through the stop area, a U-shaped frame is hinged on the lower stop plate, the lower part of the U-shaped frame is open, the U-shaped frame can be rotated upward so that the U-shaped frame cover is set on the upper stop plate; a locking bolt is set on the top of the U-shaped frame, and the locking bolt is rotated downward so that the locking bolt is pressed downward against the upper stop plate.

7. The hoisting device for a ship shaft sleeve according to claim 1, characterized in that: The auxiliary support mechanism includes a base, and a scissors-fork structure is arranged on the upper surface of the base. The scissors-fork structure includes two cross-arranged second connecting rods, and the intersection of the two second connecting rods is hinged; a slider is hinged at the bottom of each second connecting rod, and the bottom of each slider is slidably connected to the base.

8. The hoisting device for a ship shaft sleeve according to claim 7, characterized in that: Two positioning plates are fixedly connected to the base, the positioning plates are arranged vertically, a slide groove is set between the two positioning plates, the slider is set in the slide groove and slides along the length direction of the slide groove; the auxiliary support mechanism also includes an adjusting screw, the adjusting screw passes through the positioning plate and the slider, and the adjusting screw is threadedly connected to the positioning plate and the slider respectively.

9. The hoisting device for a ship shaft sleeve according to claim 7, characterized in that: A fixing frame is arranged on the top of the two second connecting rods, and the fixing frame is arranged horizontally. Two parallel guide wheels are arranged on the fixing frame, and the area between the axes of the two guide wheels is a supporting surface for placing the ship shaft sleeve.

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