A safe lifting tool for ships

Abstract

The present invention relates to a field of lifting technology, and specifically to a marine safety lifting tool. The tool comprises a connecting sleeve, wherein the upper end of a hook is elastically slidably arranged in the connecting sleeve, a first gear is rotatably connected to one side of the hook below the connecting sleeve, a first rack is arranged on one side of the first gear, the first rack meshes with the first gear, the first rack is fixed to the connecting sleeve, a first connecting rod is fixed to the first gear, a vertical sliding rod is slidably arranged in the vertical direction on the other side of the hook, a bottom plate is fixed to the lower end of the sliding rod, a second rack parallel to the sliding rod is fixed to the sliding rod, a second gear is rotatably connected to the hook on one side of the second rack, the second rack meshes with the second gear, and a second connecting rod is fixed to the second gear. When a lifting rope is located in the hook and is being lifted, the hook descends under the action of the gravity of the object, and the first connecting rod rotates and prevents the lifting rope in the hook from falling out of the hook, thereby preventing the object from shaking too much and causing the hook to become unhooked.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, in particular to a safe hoisting tool for ships. Background Art

[0002] The lifting hook is the most common lifting tool in lifting machinery. In the field of marine lifting tools, due to the influence of the working environment, the objects being lifted are prone to swinging greatly during the lifting process. Therefore, the anti-unhooking function of marine lifting tools needs to be strengthened during operation. At the same time, it is necessary to improve its convenience of use, such as having an automatic unhooking function. After the object is lifted to the designated location, the marine lifting tool with automatic unhooking does not require manual unhooking, which can greatly improve the convenience of use. However, some existing marine lifting tools use conventional anti-unhooking structures, which require manual unhooking and do not have an automatic unhooking function, making them inconvenient to use.

[0003] Some existing hooks typically have an anti-unhooking plate at the hook's opening. One end of the anti-unhooking plate is rotatably connected to the hook via a rotating shaft. A torsion spring is mounted on the rotating shaft. One end of the torsion spring abuts the anti-unhooking plate, while the other end of the torsion spring abuts the hook. The other end of the anti-unhooking plate abuts the inner side of the hook end. When the rope is hung on the hook, the rope can be moved into the hook, pushing the anti-unhooking plate to rotate. After the rope passes over the anti-unhooking plate and enters the hook, the anti-unhooking plate returns to its original position, stabilizing the rope within the hook. The anti-unhooking plate prevents the rope from exiting the hook, thus preventing it from exiting. However, this structure requires manual unhooking. To unhook the rope, the anti-unhooking plate must be rotated into the hook and then the rope must be pulled out. Automatic unhooking is not possible.

[0004] The patent document with the authorization announcement number CN116199102B discloses a hook structure of a crane, comprising: a hook body, which can be used to hoist a suspended object, a notch being provided on the hook body, and the hook body can pass through the hoisting part of the suspended object through the notch; a locking mechanism connected to the hook body, and the locking mechanism can lock the hoisting part of the suspended object, and the locking mechanism comprises a movable part, a first locking part and a second locking part, the first locking part and the second locking part having a first state and a second state, when the first locking part and the second locking part are in the first state, the tops of the first locking part and the second locking part are open, the bottom ends of the first locking part and the second locking part are tilted upward, and the suspended object is released from the first locking part. The locking mechanism further comprises a first locking member and a second locking member which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an second locking member and which are engaged to a first locking member and an The locking mechanism further comprises two mounting seats connected to the bottom side of the hook body, the first locking portion and the second locking portion being rotatably connected to the two mounting seats respectively, and a torsion spring is connected between the first locking portion and the second locking portion and the two mounting seats, the torsion spring being used to drive the first locking portion and the second locking portion to change from the second state to the first state when the first locking portion and the second locking portion are not under force; a sealing mechanism is connected between the locking mechanism and the hook body, the sealing mechanism can perform a secondary locking on the hanging part of the suspended object, the sealing mechanism comprises a sealing portion, the sealing portion can be flipped and seals the notch, the sealing mechanism further comprises a supporting seat connected at the notch, the supporting seat being rotatably connected to the first rotating portion. The cam is connected to the first rotating shaft, and the cam can be turned around with the first rotating shaft as the axis. A driving assembly is connected between the first rotating shaft and the movable part, and the movable part can drive the driving assembly to operate so that the first rotating shaft rotates, thereby providing power for the turning of the sealing part. The driving assembly includes a first retractable disk rotatably connected to the first rotating shaft, a second rotating shaft rotatably connected to the hook body, and a toothed plate connected to the movable part. The second retractable disk is rotatably connected to the second rotating shaft, and a connecting rope is provided between the second retractable disk and the first retractable disk. The second rotating shaft is also connected to a gear, and the toothed plate is meshed with the gear. The toothed plate can push the gear to rotate, so that the driving assembly runs.Before hoisting the suspended object, the movable part is in the initial state, and the first locking part and the second locking part are in the first state. At this time, the hook body is passed through the hoisting position of the suspended object through the notch, and the crane is started to hoist the suspended object upward through the hook body. At this time, the movable part contacts the hoisting part of the suspended object, and the distance between the movable part and the bottom side of the hook body gradually decreases. At the same time, the movable part pushes the end of the first locking part and the second locking part that are close to each other to flip downward at the same time, so that the end of the first locking part and the second locking part that are away from each other is tilted, forming a second state for limiting the hoisting part of the suspended object. When the movable part is close to the bottom side of the hook body, the length of the guide member extending out of the bottom of the hook body becomes longer, driving The connecting arm moves away from the hook body and stretches the first elastic part. At the same time, the movable part drives the tooth plate to mesh with the gear, so that the second retractable disk reels the connecting rope and the first retractable disk releases the connecting rope, thereby driving the first rotating shaft to rotate, so that the sealing part flips over and closes the gap of the hook body. When the suspended object is lowered, the bottom of the suspended object contacts the top of the support. At this time, the hook body continues to move downward, and the suspended object no longer applies force to the movable part. Driven by the reset assembly, the movable part resets, and the first locking part and the second locking part are transformed into the first state. At the same time, the movable part drives the driving assembly to operate, so that the sealing part resets and the gap is opened, so that the hook body can be removed. This hook structure requires the opening of an inner cavity and the first and second retractable disks on the hook body. The processing cost of the hook body is high, and the load-bearing capacity of the hook body is low. Summary of the Invention

[0005] The main purpose of the present invention is to provide a marine safety lifting tool with anti-unhooking function and automatic unhooking function and good convenience in use.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The first gear is engaged with the second gear, and the second gear is fixed on the second gear. When the bottom plate, the slide rod and the second rack move upward, the second gear drives the second connecting rod to rotate and can pull the lifting rope in the hook out of the hook.

[0008] Specifically, a hole block is fixed in the lower end of the connecting sleeve, the upper end of the hook passes through the hole block and is located in the connecting sleeve, a retaining ring is fixed on the upper end of the hook, a spring is arranged between the retaining ring and the hole block, the upper end of the spring is tightly against the retaining ring, and the lower end of the spring is tightly against the hole block.

[0009] Specifically, a fixing block is fixed to the upper end of the hole stop, and after the hook moves downward, the upper end of the fixing block can tightly contact the lower end of the blocking ring.

[0010] Specifically, a stop block is fixed to the upper end of the slide rod.

[0011] Specifically, a plurality of balls are installed on the lower end of the bottom plate.

[0012] Specifically, the axes of the first gear and the second gear are parallel, and the second gear is located below the first gear.

[0013] Specifically, the bottom plate is located below the hook.

[0014] Specifically, a lifting lug is fixed to the upper end of the connecting sleeve.

[0015] During use, the crane lowers the hook, and then the staff hangs the rope into the hook from the opening of the hook. The crane then drives the hook upward, and lifts the object as the hook moves upward. After the object is lifted, under the action of the gravity of the object, the hook compresses the spring and moves downward. Under the action of the engagement of the first gear and the first rack, the first gear and the first connecting rod rotate. After the first connecting rod rotates, the opening of the hook is blocked. Under the blocking action of the first connecting rod, the rope can be prevented from falling out of the hook during the process of the hook driving the object to move.

[0016] After the object is hoisted to the designated location, the crane lowers the hook. When the hook is no longer under load, the spring causes the hook to rise as a whole. As the hook returns to its original position, the first connecting rod returns to its original position, no longer obstructing the rope inside the hook. Once the base plate contacts the object being hoisted, the hook continues to lower, and the slide bar and second gear move upward relative to the hook. The second gear and second connecting rod rotate, and this rotation of the second connecting rod pulls the rope out of the hook, enabling automatic unhooking.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the lifting rope is inside the hook and the object is being lifted, the hook moves downward under the gravity of the object, and the first connecting rod rotates to prevent the lifting rope inside the hook from coming out of the hook, thereby preventing the object from shaking too much and becoming unhooked.

[0019] 2. After the object is hoisted to the designated location, the hook is lowered. When the hook is no longer under load, the spring causes the upper end of the hook to return to its original position within the connecting sleeve. Simultaneously, the first connecting rod returns to its original position, and the first connecting rod no longer blocks the rope in the hook. When the base plate contacts the hoisted object, the hook is lowered again. The slide rod and the second gear move upward relative to the hook, and the second gear and the second connecting rod rotate. This rotation of the second connecting rod pulls the rope out of the hook, thereby achieving automatic unhooking.

[0020] 3. By setting a fixed block in the connecting sleeve, the upper end of the fixed block can block the retaining ring, which can prevent the spring from being over-compressed when the hook lifts the object, and can effectively protect the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front view of this lifting tool.

[0022] Figure 2 This is a 3D view of the lifting tool.

[0023] Figure 3 This is a cross-sectional view of this lifting tool.

[0024] Figure 4 This is a schematic diagram of the hook lifting the object.

[0025] Figure 5 Schematic diagram of the connection between the second gear and the second connecting rod.

[0026] Figure 6 Schematic diagram of the cooperation between the sliding rod and the second rack.

[0027] Figure 7 This is a schematic diagram of the lifting tool when it is automatically unhooked.

[0028] The names of the parts in the accompanying drawings are: 1. Lifting ear; 2. Connecting sleeve; 3. First rack; 4. First gear; 5. First connecting rod; 6. Hook; 7. Sliding rod; 8. Bottom plate; 9. Ball; 10. Stop block; 11. Second gear; 12. Second connecting rod; 13. Second rack; 14. Fixing block; 15. Spring; 16. Lifting rope. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] The primary purpose of the present invention is to provide a safe marine lifting tool that features both an anti-unhooking function and an automatic unhooking function, and is user-friendly. This safe marine lifting tool has an anti-unhooking function, preventing the lifting rope 16 from being pulled out of the hook 6 during lifting, potentially causing a safety accident. Furthermore, it features an automatic unhooking function after the lifting is complete, making it convenient to use.

[0031] like Figure 1-Figure 7 As shown, a marine safety lifting tool comprises a connecting sleeve 2, and a lifting lug 1 is fixed to the upper end of the connecting sleeve 2.

[0032] The upper end of the hook 6 is elastically slidably arranged in the connecting sleeve 2, and the hook 6 can slide in the axial direction of the connecting sleeve 2. A hole block is fixed in the lower end of the connecting sleeve 2, and the upper end of the hook 6 passes through the hole block and is located in the connecting sleeve 2. A retaining ring is fixed to the upper end of the hook 6, and a spring 15 is arranged between the retaining ring and the hole block. The upper end of the spring 15 is tightly against the retaining ring, and the lower end of the spring 15 is tightly against the hole block.

[0033] A fixing block 14 is fixed to the upper end of the hole block, and the upper end of the fixing block 14 can tightly contact the lower end of the retaining ring after the hook 6 moves downward. By arranging the fixing block 14 in the connecting sleeve 2, the upper end of the fixing block 14 can block the retaining ring, thereby preventing the spring 15 from being overly compressed when the hook 6 lifts an object, and effectively protecting the spring 15.

[0034] One side of the hook 6 below the connecting sleeve 2 is rotatably connected to the first gear 4, and a vertical first rack 3 is provided on one side of the first gear 4. The first rack 3 is engaged with the first gear 4, and the first rack 3 is fixed on the connecting sleeve 2. A first connecting rod 5 is fixed on the first gear 4. After the hook 6 is forced to move downward, the first connecting rod 5 rotates and prevents the lifting rope 16 in the hook 6 from falling out of the hook 6.

[0035] A vertical slide bar 7 is provided on the other side of the hook 6 below the connecting sleeve 2, and a stopper 10 is fixed to the upper end of the slide bar 7. The stopper 10 can limit the slide bar 7 and prevent the slide bar 7 from separating from the hook 6. A base plate 8 is fixed to the lower end of the slide bar 7, and the base plate 8 is located below the hook 6. A plurality of balls 9 are mounted on the lower end of the base plate 8. A second rack 13 is fixed to the slide bar 7, which is parallel to the slide bar 7. A second gear 11 is rotatably connected to the hook 6 on one side of the second rack 13. The axes of the first gear 4 and the second gear 11 are parallel, and the second gear 11 is located below the first gear 4. The second rack 13 meshes with the second gear 11. A second connecting rod 12 is fixed to the second gear 11. When the base plate 8, the slide bar 7, and the second rack 13 move upward, the second gear 11 drives the second connecting rod 12 to rotate and can pull the rope 16 in the hook 6 out of the hook 6.

[0036] During use, the crane lowers the hook 6, and then the staff hangs the rope 16 into the hook 6 from the opening of the hook 6. The crane then drives the hook 6 to move upward, and the hook 6 lifts the object as it moves upward. After the object is lifted, under the action of the gravity of the object, the hook 6 compresses the spring 15 and moves downward. Under the action of the engagement of the first gear 4 and the first rack 3, the first gear 4 and the first connecting rod 5 rotate. After the first connecting rod 5 rotates, the opening of the hook 6 is blocked. Under the blocking action of the first connecting rod 5, the rope 16 can be prevented from falling out of the hook 6 during the process of the hook 6 driving the object to move.

[0037] After the object is lifted to the designated location, the crane moves the hook 6 downward. When the hook 6 is no longer under force, the spring 15 moves the hook 6 upward as a whole. When the hook 6 is restored upward, the first connecting rod 5 is restored, and the first connecting rod 5 no longer blocks the rope 16 in the hook 6.

[0038] When the base plate 8 contacts the object to be lifted, it continues to the hook 6 below. Under the action of the gravity of the hook 6, the hook 6 moves downward, the slide bar 7 and the second gear 11 move upward relative to the hook 6, and the second gear 11 and the second connecting rod 12 rotate. When the second connecting rod 12 rotates, the rope 16 in the hook 6 can be pulled out, thereby realizing automatic unhooking operation.

[0039] In this embodiment, balls 9 are provided at the lower end of the base plate 8. When the balls 9 on the base plate 8 come into contact with the object being hoisted, the base plate 8 can be moved over the object. This facilitates the hook 6 to move away from the rope 16 after the crane arm swings, preventing the hook 6 from hooking the rope 16 again when the hook 6 is raised. The base plate 8, through the balls 9, contacts the object being hoisted, preventing the base plate 8 from scratching the object during its movement.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A marine safety lifting tool, comprising a connecting sleeve (2), characterized in that: The upper end of the hook (6) is elastically slidably arranged in the connecting sleeve (2), and the hook (6) can slide in the axial direction of the connecting sleeve (2). One side of the hook (6) below the connecting sleeve (2) is rotatably connected to the first gear (4), and a vertical first rack (3) is arranged on one side of the first gear (4). The first rack (3) is meshed with the first gear (4), and the first rack (3) is fixed on the connecting sleeve (2). A first connecting rod (5) is fixed on the first gear (4). After the hook (6) is forced downward, the first connecting rod (5) rotates and prevents the rope (16) in the hook (6) from falling out of the hook (6). A vertical slide rod (7) is slidably arranged in the vertical direction on the other side of the hook (6) below the connecting sleeve (2). A bottom plate (8) is fixed on the lower end of the slide rod (7). A second rack (13) parallel to the rack is fixed on the top, a second gear (11) is rotatably connected to the hook (6) on one side of the second rack (13), the second rack (13) is meshed with the second gear (11), a second connecting rod (12) is fixed on the second gear (11), and when the bottom plate (8), the slide bar (7) and the second rack (13) move upward, the second gear (11) drives the second connecting rod (12) to rotate and can pull the rope (16) in the hook (6) out of the hook (6); a hole block is fixed in the lower end of the connecting sleeve (2), the upper end of the hook (6) passes through the hole block and is located in the connecting sleeve (2), a retaining ring is fixed on the upper end of the hook (6), a spring (15) is provided between the retaining ring and the hole block, the upper end of the spring (15) is tightly against the retaining ring, and the lower end of the spring (15) is tightly against the hole block.

2. A marine safety lifting tool according to claim 1, characterized in that: A fixing block (14) is fixed to the upper end of the hole block, and after the hook (6) moves downward, the upper end of the fixing block (14) can tightly contact the lower end of the blocking ring.

3. A marine safety lifting tool according to claim 1, characterized in that: A stopper (10) is fixed to the upper end of the slide rod (7).

4. A marine safety lifting tool according to claim 1, characterized in that: A plurality of balls (9) are installed at the lower end of the bottom plate (8).

5. A marine safety lifting tool according to claim 1, characterized in that: The axes of the first gear (4) and the second gear (11) are parallel, and the second gear (11) is located below the first gear (4).

6. A marine safety lifting tool according to claim 1, characterized in that: The bottom plate (8) is located below the hook (6).

7. A marine safety lifting tool according to claim 1, characterized in that: A lifting lug (1) is fixed to the upper end of the connecting sleeve (2).

Images