Marine gearbox housing disassembly and assembly type lifting tool and lifting method

Abstract

The invention discloses a dismounting type hoisting tool and hoisting method for a marine gearbox housing, and belongs to the field of maintenance of marine gearbox parts. According to the invention, the technical problems of complex operation and low working efficiency of hoisting the gear box housing during maintenance of the gear box due to the structural design of a ship body are solved. Pin holes are formed in the upper portion, the left side, the right side and the lower portion of the lifting hook, a lifting lug is arranged on the upper portion of an external gearbox housing, the lifting hook is detachably connected with the gearbox housing through a first pin shaft, pin holes are formed in the lower portion of the ring hook, and the lifting hook is detachably connected with the ring hook through a second pin shaft. The steel wire rope penetrates through the tackle, the other end of the steel wire rope is detachably connected with the ring hook, a pin hole is formed in the lower portion of the tackle, the tackle is detachably connected with the lifting hook through a third pin shaft, the tackle is in sliding connection with an external sliding way, and the tackle transversely slides through the external sliding way. Working steps are reduced, and working efficiency is improved. The device is used for installation and maintenance of marine equipment.

Description

Technical Field

[0001] The invention relates to a marine gearbox cover disassembly and assembly lifting tool and a lifting method, belonging to the field of marine gearbox parts maintenance. Background Art

[0002] At present, the shipbuilding industry is growing stronger and stronger. my country's shipbuilding industry is in a new growth cycle and its position in the world continues to be stable. With the rapid development of my country's shipbuilding industry, ship equipment is also making continuous technological progress, and post-maintenance maintenance has become a major business segment. In the maintenance of marine equipment, the cabin environment is complex, the working space is limited, and there are many cross-operations, which puts higher requirements on the professionalism of maintenance tools and personnel.

[0003] When the gearbox needs to be repaired, due to the hull structure design, there is an obstacle box above the gearbox cover, and the space is limited. When lifting the gearbox cover, the operation is complicated and it is necessary to use the fall chain many times to slowly move the position. It requires high manpower and requires the coordination of multiple people to safely remove the cover. Therefore, the reliability, safety and maintainability requirements of the repair cannot be guaranteed.

[0004] In summary, due to the hull structure design, there are technical problems such as complex operation of lifting the gear box cover and low work efficiency when repairing the gear box. Summary of the invention

[0005] The present invention aims to solve the above-mentioned technical problems of complex operation and low work efficiency in lifting the gearbox cover when repairing the gearbox due to the hull structure design, and further provides a marine gearbox cover disassembly and assembly lifting tool.

[0006] The technical solution of the present invention is a marine gearbox cover detachable lifting tool, which includes a wire rope, a pulley, a ring hook, a hook, a first pin shaft, a second pin shaft and a third pin shaft. Pin holes are arranged on the upper part, left and right sides and the lower part of the hook. A lifting ear is arranged on the upper part of an external gearbox cover. The hook is detachably connected to the gearbox cover through a first pin shaft. A pin hole is arranged on the lower part of the ring hook. The hook is detachably connected to the ring hook through a second pin shaft. One end of the wire rope is fixedly connected to a fall chain. The wire rope passes through the pulley and the other end of the wire rope is detachably connected to the ring hook. A pin hole is arranged on the lower part of the pulley. The pulley is detachably connected to the hook through the third pin shaft. The pulley is slidably connected to an external slideway, and the pulley realizes lateral sliding through the external slideway.

[0007] As another improvement of the present invention, the pulley includes a frame and wheels, four of the wheels are installed at the bottom of the frame, and the width of the wheels matches the width of the external slideway.

[0008] As another improvement of the present invention, all four wheels adopt rolling bearings.

[0009] As another improvement of the present invention, the frame is made of steel.

[0010] As another improvement of the present invention, a through rectangular hole is provided in the middle of the pulley, and the steel wire rope passes through the rectangular hole in the middle of the pulley, and the width of the rectangular hole is greater than the outer diameter of the steel wire rope.

[0011] As another improvement of the present invention, the first pin shaft can be detachably passed through the pin hole at the lower part of the hook and the lifting ear at the upper part of the gear box cover, and the hook and the gear box cover are detachably connected through the first pin shaft.

[0012] As another improvement of the present invention, the second pin shaft can be detachably passed through the pin hole on the upper part of the hook and the pin hole on the lower part of the ring hook, and the hook and the ring hook are detachably connected through the second pin shaft.

[0013] As another improvement of the present invention, the third pin shaft can be detachably passed through the pin holes on the left and right sides of the hook and the pin holes at the bottom of the pulley, and the pulley and the hook are detachably connected through the third pin shaft.

[0014] The present invention also provides a lifting method based on a marine gearbox cover detachable lifting tool, comprising the following steps:

[0015] S1. Place the pulley into the slideway of the gearbox housing above the gearbox cover;

[0016] S2. Pass the wire rope through the maintenance process hole of the box and the middle of the pulley, hang one end of the wire rope on the hook of the fall chain, and tie the other end of the wire rope to the ring hook;

[0017] S3, connect the hook and the gear box cover, pull the fall chain to lift the gear box cover;

[0018] S4, connect the pulley and the hook, and release the wire rope on the hook;

[0019] S5. The transverse pulley drives the gear box cover to move transversely to the specified position.

[0020] Beneficial effects of the present invention:

[0021] 1. When the marine gearbox cover disassembly and assembly lifting tool of the present invention is used for lifting, the gearbox cover can be smoothly moved laterally without collision with the box body due to the transfer position, thus ensuring the safety of the disassembly process. The tool is simple and reliable, reduces the working steps, and improves the working efficiency.

[0022] 2. By setting the ring hook and the hook connection, the flexibility of the hook working process is enhanced, which facilitates the docking and installation of the gear box cover with the pulley after lifting, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1The utility model is a schematic diagram of the overall structure of a marine gearbox cover disassembly and assembly type lifting tool of the present invention.

[0024] Figure 2 It is a top view schematic diagram of the pulley.

[0025] Figure 3 It is a partial cross-sectional schematic diagram of the connection between the first pin and the second pin.

[0026] Figure 4 This is a schematic diagram of the process in which the pulley drives the gear box cover to move horizontally, and the direction of the arrow in the figure is the direction of the horizontal movement. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be explained that the positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are only based on the positional relationships of the orientations shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred components have specific orientations, are constructed and operated in specific orientations, and therefore cannot be understood as limitations on the present invention.

[0028] Specific implementation method 1: Combination Figures 1 to 4 The present embodiment is described. The present embodiment is a marine gearbox cover detachable lifting tool, which comprises a wire rope 1, a pulley 2, a ring hook 3, a hook 4, a first pin shaft 6, a second pin shaft 7 and a third pin shaft 8. Pin holes are arranged on the upper part, the left and right sides and the lower part of the hook 4. A lifting lug is arranged on the upper part of the external gearbox cover. The hook 4 is detachably connected to the gearbox cover through the first pin shaft 6. A pin hole is arranged on the lower part of the hook 4, and a pin hole is arranged on the lower part of the ring hook 3. The hook 4 is connected by a first pin shaft 6 and a second pin shaft 7 to ensure the freedom of the hook 4 along the vertical circumferential direction during the lifting process. To facilitate the subsequent connection with the pulley 2, the hook 4 and the ring hook 3 are detachably connected through the second pin shaft 7, one end of the wire rope 1 is fixedly connected to the fall chain, the other end of the wire rope 1 passes through the pulley 2, and the other end of the wire rope 1 is detachably connected to the ring hook 3, and the lower part of the pulley 2 is provided with pin holes. The pin holes at the lower part of the pulley 2 are symmetrically arranged along the left and right sides, corresponding to the positions of the pin holes on the left and right sides of the hook 4. The pulley 2 and the hook 4 are detachably connected through two third pin shafts 8, which are used to ensure the stability of the gear box cover when the pulley 2 moves laterally laterally. The pulley 2 is slidably connected to the external slide, and the pulley 2 realizes lateral sliding through the external slide.

[0029] The box body on the upper part of the gear box cover hinders the lifting of the gear box cover. The slide is installed in the external upper box body. When the hull equipment is inspected and repaired, the gear box cover needs to be lifted. The special tool of this embodiment can smoothly move horizontally to bypass the upper obstacle box body, and will not collide with the box body due to the transfer position, thus ensuring the safety of the disassembly process. The tool is simple and reliable, reduces the work steps, and improves work efficiency.

[0030] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the pulley 2 includes a frame and wheels 5. Four wheels 5 are installed at the bottom of the frame. The width of the wheels 5 matches the width of the external slideway. During operation, the wheels 5 need to be slidably installed on the external slideway. The slideway is installed in the external upper box. The upper box of the gearbox cover hinders the lifting of the gearbox cover. The role of the rationally designed slideway is to meet the subsequent working process and facilitate the lateral movement of the gearbox cover. Other components and connection methods are the same as those of the first embodiment.

[0031] Specific implementation method three: Combination Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the four wheels 5 all use rolling bearings. The purpose of this design is to make the structure simpler and more reliable and improve the displacement efficiency of the pulley. The other components and connection methods are the same as those of the first or second embodiment.

[0032] Specific implementation method four: Combination Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the frame is made of steel. The purpose of this design is to enhance the stability of the structure. The other components and connection methods are the same as any one of the first to third embodiments.

[0033] Specific implementation method five: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that a rectangular hole is provided in the middle of the pulley 2. The wire rope 1 passes through the rectangular hole in the middle of the pulley 2. The width of the rectangular hole is larger than the outer diameter of the wire rope 1. The purpose of this design is to allow the wire rope to move up and down in the middle of the pulley 2, which is convenient for the subsequent docking of the pulley 2 and the hook 4. The other components and connection methods are the same as any one of the first to fourth embodiments.

[0034] Specific implementation method six: Combination Figure 1 , Figure 3 and Figure 4This embodiment is described. The difference between this embodiment and the first embodiment is that the first pin shaft 6 can be detachably passed through the pin hole at the lower part of the hook 4 and the lifting ear at the upper part of the gear box cover, and the hook 4 and the gear box cover are detachably connected through the first pin shaft 6. The other components and connection methods are the same as any one of the first to fifth embodiments.

[0035] Specific implementation method seven: Combination Figure 1 , Figure 3 and Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the second pin shaft 7 can be detachably passed through the pin hole on the upper part of the hook 4 and the pin hole on the lower part of the ring hook 3, and the hook 4 and the ring hook 3 are detachably connected through the second pin shaft 7. Other components and connection methods are the same as any one of the first to sixth embodiments.

[0036] Specific implementation method eight: Combination Figure 1 and Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the third pin shaft 8 can be detachably passed through the pin holes on the left and right sides of the hook 4 and the pin hole at the bottom of the pulley 2, and the pulley 2 and the hook 4 are detachably connected through the third pin shaft 8. The other components and connection methods are the same as any one of the first to seventh embodiments.

[0037] Specific implementation method nine: Combination Figures 1 to 4 This embodiment is described. This embodiment is based on a lifting method of a marine gearbox cover disassembly and assembly lifting tool in the first embodiment, and includes the following steps:

[0038] S1, put the pulley 2 into the slideway of the box body above the gear box cover;

[0039] S2, pass the steel wire rope 1 through the maintenance process hole of the box body and the middle of the pulley 2, hang one end of the steel wire rope 1 on the hook of the fall chain, and tie the other end of the steel wire rope 1 to the ring hook 3;

[0040] S3, connect the hook 4 and the gear box cover, pull the fall chain to lift the gear box cover;

[0041] S4, connect the pulley 2 and the hook 4, and release the wire rope on the hook;

[0042] S5, the transverse pulley 2 drives the gear box cover to move transversely to the specified position.

[0043] The box body on the upper part of the gear box cover hinders the lifting of the gear box cover. The slide is installed in the external upper box body. When the hull equipment is inspected and repaired, the gear box cover needs to be lifted. The special tool of this embodiment can smoothly move horizontally to bypass the upper obstacle box body, and will not collide with the box body due to the transfer position, thus ensuring the safety of the disassembly process. The tool is simple and reliable, reduces the work steps, and improves work efficiency.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A marine gearbox cover disassembly and assembly lifting tool, characterized in that The invention comprises a steel wire rope (1), a pulley (2), a ring hook (3), a hook (4), a first pin shaft (6), a second pin shaft (7) and a third pin shaft (8). The upper part, left and right sides and the lower part of the hook (4) are all provided with pin holes. The upper part of the external gear box cover is provided with a lifting lug. The hook (4) and the gear box cover are detachably connected through the first pin shaft (6). The lower part of the ring hook (3) is provided with a pin hole. The hook (4) and the ring hook (3) are detachably connected through the second pin shaft (7). One end of the steel wire rope (1) is fixedly connected to a fall chain. The other end of the steel wire rope (1) passes through the pulley (2). The other end of the steel wire rope (1) is detachably connected to the ring hook (3). The lower part of the pulley (2) is provided with a pin hole. The pulley (2) and the hook (4) are detachably connected through the third pin shaft (8). The pulley (2) is slidably connected to an external slideway. The pulley (2) realizes transverse sliding through the external slideway.

2. A marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: The pulley (2) comprises a frame and wheels (5), wherein four wheels (5) are mounted on the bottom of the frame, and the width of the wheels (5) matches the width of an external slideway.

3. A marine gearbox cover disassembly and assembly lifting tool according to claim 2, characterized in that: The four wheels (5) all use rolling bearings.

4. A marine gearbox cover disassembly and assembly lifting tool according to claim 2, characterized in that: The frame is made of steel.

5. A marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: A through rectangular hole is provided in the middle of the pulley (2), and the steel wire rope (1) passes through the rectangular hole in the middle of the pulley (2), and the width of the rectangular hole is greater than the outer diameter of the steel wire rope (1).

6. A marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: The first pin shaft (6) can be detachably passed through the pin hole at the bottom of the lifting hook (4) and the lifting ear at the top of the gear box cover, and the lifting hook (4) and the gear box cover are detachably connected via the first pin shaft (6).

7. A marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: The second pin shaft (7) can be detachably passed through the pin hole on the upper part of the hook (4) and the pin hole on the lower part of the ring hook (3); the hook (4) and the ring hook (3) are detachably connected via the second pin shaft (7).

8. A marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: The third pin shaft (8) can be detachably passed through the pin holes on the left and right sides of the hook (4) and the pin hole at the bottom of the pulley (2), and the pulley (2) and the hook (4) are detachably connected via the third pin shaft (8).

9. A lifting method based on the marine gearbox cover disassembly and assembly lifting tool according to claim 1, characterized in that: The following steps are involved: S1. Place the pulley (2) into the slideway of the gear box housing above the gear box cover; S2, pass the steel wire rope (1) through the maintenance process hole of the box body and the middle part of the pulley (2), hang one end of the steel wire rope (1) on the hook of the fall chain, and tie the other end of the steel wire rope (1) to the ring hook (3); S3, connecting the hook (4) and the gear box cover, pulling the fall chain to lift the gear box cover; S4, connect the pulley (2) and the hook (4), and release the wire rope on the hook; S5, the transverse pulley (2) drives the gear box cover to transversely move to a specified position.

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