A marine gearbox cover disassembly and assembly lifting tool and lifting method

Abstract

A detachable lifting tool and method for a marine gearbox cover, belonging to the field of marine gearbox component maintenance. The present invention solves the technical problem of complex operation and low work efficiency in lifting a gearbox cover during gearbox maintenance due to the hull structure design. Pin holes are provided on the upper, left and right sides, and lower portion of the hook. Lifting ears are provided on the upper portion of the external gearbox cover. The hook and the gearbox cover are detachably connected via a first pin shaft. A pin hole is provided on the lower portion of the ring hook. The hook and the ring hook are detachably connected via a second pin shaft. One end of the wire rope is fixedly connected to a fall chain. The wire rope passes through a pulley and the other end of the wire rope is detachably connected to the ring hook. A pin hole is provided on the lower portion of the pulley. The pulley and the hook are detachably connected via a third pin shaft. The pulley is slidably connected to an external slideway, and the pulley slides laterally via the external slideway. The present invention reduces work steps and improves work efficiency. It is used for the 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 component maintenance. Background Art

[0002] The shipbuilding industry is currently experiencing rapid growth and development, and my country's shipbuilding industry is entering a new growth cycle, maintaining its position globally. With the rapid development of my country's shipbuilding industry, marine equipment is also undergoing continuous technological advancements, and post-sales maintenance has become a key business segment. Marine equipment maintenance is characterized by complex cabin environments, limited working space, and frequent cross-operation, placing higher demands on the professionalism of both maintenance tools and personnel.

[0003] When the gearbox needs to be repaired, the space above the gearbox cover is limited due to the ship's structural design. Lifting the cover is complex and requires multiple use of a fall chain to slowly shift the gearbox cover. This requires high manpower and coordination of multiple personnel 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 gearbox cover and low work efficiency when repairing the gearbox. 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 provided on the upper part, left and right sides and lower part of the hook. A lifting ear is provided on the upper part of the external gearbox cover. The hook and the gearbox cover are detachably connected through the first pin shaft. A pin hole is provided on the lower part of the ring hook. The hook and the ring hook are detachably connected through the second pin shaft. One end of the wire rope is fixedly connected to the 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 provided on the lower part of the pulley. The pulley and the hook are detachably connected through the third pin shaft. The pulley is slidably connected to the external slideway, and the pulley achieves horizontal 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 mounted on 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 larger 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 hole 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 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 to the gear box cover, pull the fall chain to lift the gear box cover;

[0018] S4. Connect the pulley and 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 using the marine gearbox cover disassembly and assembly lifting tool of the present invention for lifting, the gearbox cover can be moved horizontally smoothly without colliding with the box body due to the shifting position, thereby ensuring the safety of the disassembly process. The tool is simple and reliable, reduces work steps, and improves work efficiency.

[0022] 2. By setting up a ring hook to connect with the hook, 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 present invention is a schematic diagram of the overall structure of a marine gearbox cover disassembly and assembly lifting tool.

[0024] Figure 2 This is a top view 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 of the gearbox cover being driven by the pulley to move horizontally, and the direction of the arrow in the figure is the direction of 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 are within 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 "up", "down", "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 a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0028] Specific implementation method 1: Combination Figures 1 to 4 This embodiment describes a detachable lifting tool for a marine gearbox cover, comprising a wire rope 1, a pulley 2, a hook 3, a hook 4, a first pin 6, a second pin 7, and a third pin 8. Pin holes are provided on the upper portion, left and right sides, and lower portion of the hook 4. A lifting lug is provided on the upper portion of the external gearbox cover. The hook 4 is detachably connected to the gearbox cover via the first pin 6. A pin hole is provided at the lower portion of the hook 4, and a pin hole is provided at the lower portion of the hook 3. The hook 4 is connected via a first pin 6 and a second pin 7 to ensure the freedom of the hook 4 in the vertical circumferential direction during the lifting process. To facilitate 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 a pin hole is provided at the lower part of the pulley 2. 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. The pulley 2 is slidably connected to the external slide, and the pulley 2 achieves 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 performing maintenance work on the hull equipment, the gear box cover needs to be lifted. Using the special tool of this embodiment, the gear box cover can be smoothly moved horizontally to bypass the upper obstacle box body, and will not collide with the box body due to the transfer position, thereby 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 differs from the first embodiment in that the pulley 2 comprises a frame and wheels 5. Four wheels 5 are mounted at the bottom of the frame, and their width matches the width of an external slideway. During operation, the wheels 5 slide onto the external slideway, which is mounted in an external upper housing. The housing above the gearbox cover obstructs lifting. A properly designed slideway facilitates subsequent operation and facilitates lateral movement of the gearbox cover. Other components and connections are identical to those in the first embodiment.

[0031] Specific implementation method three: Combination Figure 2 This embodiment differs from the first embodiment in that all four wheels 5 utilize rolling bearings. This design aims to simplify and enhance the structure and improve the pulley's displacement efficiency. The remaining components and connection methods are the same as those of the first or second embodiments.

[0032] Specific implementation method four: Combination Figure 2 This embodiment differs from the first embodiment in that the frame is made of steel. This design enhances structural stability. The remaining components and connections are the same as in any of the first to third embodiments.

[0033] Specific implementation method five: Combination Figures 1 to 4 This embodiment differs from the first embodiment in that a rectangular hole is provided through the center of pulley 2, through which the wire rope 1 passes. The width of the hole is larger than the outer diameter of the wire rope 1. This design allows the wire rope to move up and down within the center of pulley 2, facilitating the subsequent docking of pulley 2 and hook 4. The remaining components and connection methods are identical to those of any of the first to fourth embodiments.

[0034] Specific implementation method six: combination Figure 1 、 Figure 3 and Figure 4This embodiment differs from the first embodiment in that the first pin 6 is detachably inserted through the pin hole at the bottom of the hook 4 and the lug at the top of the gearbox cover. The hook 4 and the gearbox cover are detachably connected via the first pin 6. The remaining components and connection methods are the same as those of any of the first to fifth embodiments.

[0035] Specific implementation method seven: combination Figure 1 、 Figure 3 and Figure 4 This embodiment differs from the first embodiment in that the second pin 7 is detachably inserted through the pin hole on the upper portion of the hook 4 and the pin hole on the lower portion of the ring hook 3, and the hook 4 and the ring hook 3 are detachably connected via the second pin 7. The remaining components and connection methods are the same as those of any of the first to sixth embodiments.

[0036] Specific implementation method eight: combination Figure 1 and Figure 4 This embodiment differs from the first embodiment in that the third pin 8 is detachably inserted through the pin holes on the left and right sides of the hook 4 and the pin hole on the lower portion of the pulley 2, and the pulley 2 and the hook 4 are detachably connected via the third pin 8. The remaining components and connection methods are the same as those of any 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 detachable lifting tool in embodiment 1, and includes the following steps:

[0038] S1. Place pulley 2 into the slideway of the gearbox cover;

[0039] S2. Pass the wire rope 1 through the maintenance process hole of the box and the middle of the pulley 2. Hang one end of the wire rope 1 on the hook of the fall chain, and tie the other end of the 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 performing maintenance work on the hull equipment, the gear box cover needs to be lifted. Using the special tool of this embodiment, the gear box cover can be smoothly moved horizontally to bypass the upper obstacle box body, and will not collide with the box body due to the transfer position, thereby 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 they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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 various 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 the fall chain; the other end of the steel wire rope (1) passes through the pulley (2); and 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 the external slideway; and 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). 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 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 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 detachable 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 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, connect the hook (4) and the gear box cover, pull 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 move transversely to the specified position.

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