Anti-falling lifting hook

Abstract

An anti-falling lifting hook belongs to the field of lifting hooks and comprises a lifting hook and a locking assembly, the locking assembly comprises a baffle ring and a counterweight ring which intersect with each other, the baffle ring is located in an opening of the lifting hook, the counterweight ring sleeves the lifting hook and is arranged obliquely downwards, a rotating shaft is rotatably arranged on the lifting hook, the baffle ring and the counterweight ring are connected with the two ends of the rotating shaft through connecting lugs respectively, and the rotating shaft comprises a shaft body. Mounting parts and threaded parts are sequentially and fixedly arranged at the two ends of the shaft body, the diameter of the mounting parts is smaller than that of the shaft body, limiting protrusions are fixedly arranged on the mounting parts, first through holes and limiting grooves are formed in the connecting lugs, the mounting parts are inserted into the first through holes, and the limiting protrusions are inserted into the limiting grooves to limit rotation of the baffle ring and the balance weight ring around the shaft; the nut is in threaded connection with the threaded part and matched with the shaft body to clamp the connecting lug, and the baffle ring, the counterweight ring and the rotating shaft are not fixed by welding any more, so that disassembly and assembly are facilitated, and later maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting hooks, in particular to an anti-drop lifting hook. Background Art

[0002] As a heavy lifting equipment, gantry cranes are widely used in construction sites, docks, warehouses and other places. During their operation, they are involved in the lifting, handling and hoisting of heavy objects. In order to avoid the loosening or breaking of the connection between the hook and the goods during the operation and prevent the accidental dropping of the goods, therefore, anti-drop hooks with anti-drop function are often used to ensure the safety of gantry crane operation.

[0003] At present, there has emerged an anti-drop hook that realizes self-locking by gravity (such as the published patent No. CN218058134U). A baffle and a counterweight ring are hinged on the lifting hook. The counterweight ring and the baffle are fixedly connected together. The counterweight ring intersects with the baffle, and the mass of the counterweight ring is greater than that of the baffle. Under the action of gravity, the counterweight ring drives the baffle to move towards the opening direction of the lifting hook, so that the baffle tilts up and abuts against the lifting hook to realize the closing of the opening of the lifting hook, thereby realizing self-locking of the baffle under the action of gravity.

[0004] For the existing anti-drop lifting hook that realizes self-locking by gravity, the baffle and the counterweight ring need to be fixedly connected into an integral structure by welding, which is inconvenient for disassembly and assembly. When the baffle is damaged, the baffle and the counterweight ring need to be cut, and the baffle and the counterweight ring need to be completely replaced and reinstalled by welding, resulting in high maintenance costs and complex maintenance processes. In addition, the angle between the baffle and the counterweight ring cannot be adjusted after welding, and the installation angle tolerance rate is low. Summary of the Utility Model

[0005] In order to solve the technical problem in the above background art that for the existing anti-drop lifting hook that realizes self-locking by gravity, the baffle and the counterweight ring need to be fixedly connected together by welding, which is inconvenient for disassembly and assembly, resulting in high maintenance costs and complex maintenance processes, the utility model provides an anti-drop lifting hook.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides an anti - shedding hook, which comprises a hook and a locking component rotatably arranged on the hook. The locking component includes an intersecting retaining ring and a counterweight ring. The retaining ring is located within the opening of the hook. The counterweight ring is sleeved on the hook and is arranged obliquely downward. The mass of the retaining ring is less than that of the counterweight ring. A rotating shaft is rotatably arranged on the hook. The retaining ring and the counterweight ring are respectively connected to the two ends of the rotating shaft through connecting ears. The rotating shaft includes a shaft body. At both ends of the shaft body, there are successively fixed an installation part and a threaded part. The diameter of the installation part is smaller than that of the shaft body. A limiting protrusion is fixedly arranged on the installation part. The connecting ear is provided with a first through - hole and a limiting groove. The installation part is inserted into the first through - hole, and the limiting protrusion is inserted into the limiting groove. The threaded part is threadedly connected with a nut, and the nut cooperates with the shaft body to clamp the connecting ear. Both the retaining ring and the counterweight ring are detachably connected to the installation part of the rotating shaft through the connecting ears. Through the cooperation of the limiting groove and the limiting protrusion, the rotation of the retaining ring and the counterweight ring around the shaft is restricted, ensuring the relative angle between the two is fixed. The cooperation between the nut and the shaft body can clamp the connecting ear to achieve the fixed connection between the retaining ring, the counterweight ring and the rotating shaft. The retaining ring, the counterweight ring and the rotating shaft are no longer fixedly connected by welding, which is convenient for disassembly and assembly and facilitates later maintenance.

[0008] Preferably, the limiting protrusion is strip - shaped and extends along the axial direction of the installation part. A plurality of limiting protrusions are fixedly arranged at intervals along the circumferential direction of the outer wall of the installation part. A plurality of limiting grooves are arranged at intervals in the circumferential direction of the first through - hole. The limiting grooves communicate with the first through - hole. The limiting grooves are of a long - hole structure, which can adjust the included angle between the retaining ring and the counterweight ring according to requirements. The adjustment of the included angle between the retaining ring and the counterweight ring is convenient, with strong adjustability and a wide application range.

[0009] Preferably, the outer diameter of the threaded part is not greater than that of the installation part to facilitate the installation of the connecting ear and the nut.

[0010] Preferably, the length of the installation part is the same as the total thickness of the two connecting ears, which is convenient for the nut and the shaft body to cooperate to clamp and fix the retaining ring and the counterweight ring.

[0011] Preferably, the retaining ring includes a first retaining rod and a second retaining rod. Both the first retaining rod and the second retaining rod are L - shaped. One end of each of the first retaining rod and the second retaining rod is connected to the rotating shaft through a connecting ear, and the other ends of the first retaining rod and the second retaining rod are inserted and connected to each other, which is convenient for the disassembly and assembly of the retaining ring, can achieve targeted replacement, and effectively reduces the maintenance cost.

[0012] Preferably, the counterweight ring includes a first counterweight rod and a second counterweight rod. Both the first counterweight rod and the second counterweight rod are L - shaped. One end of each of the first counterweight rod and the second counterweight rod is connected to the rotating shaft through a connecting ear, and the other ends of the first counterweight rod and the second counterweight rod are inserted and connected to each other, which is convenient for the disassembly and assembly of the counterweight ring, can achieve targeted replacement, and effectively reduces the maintenance cost.

[0013] Preferably, the length of the counterweight ring is greater than that of the retaining ring to ensure that the mass of the counterweight ring is greater than that of the retaining ring.

[0014] Preferably, a rubber layer is fixedly arranged on the outer wall of the retaining ring for abutting against the lifting hook, which can improve the friction force and play a role in shock absorption at the same time.

[0015] It can be seen from the above technical solutions that the advantages of the present utility model are as follows:

[0016] 1. Both the retaining ring and the counterweight ring are detachably connected to the mounting part of the rotating shaft through the connecting ears. Through the cooperation of the limiting groove and the limiting protrusion, the rotation of the retaining ring and the counterweight ring around the shaft is restricted, ensuring the relative angle between the two is fixed. The cooperation between the nut and the shaft body can clamp the connecting ears to realize the fixed connection between the retaining ring, the counterweight ring and the rotating shaft. The retaining ring, the counterweight ring and the rotating shaft are no longer fixedly connected by welding, which is convenient for disassembly and assembly and facilitates later maintenance.

[0017] 2. The limiting protrusions and the limiting grooves are both arranged at intervals in the circumferential direction, and the included angle between the retaining ring and the counterweight ring can be adjusted according to requirements. The adjustment of the included angle between the retaining ring and the counterweight ring is convenient, with strong adjustability and a wide range of applications.

[0018] 3. Both the retaining ring and the counterweight ring are of a split assembly structure, which is convenient for disassembly and assembly, and can realize targeted replacement of different parts, effectively reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required to be used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the anti-drop hook according to one or more embodiments of the present utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the locking component according to one or more embodiments of the present utility model (the nuts at both ends of the rotating shaft are not shown);

[0022] Figure 3 It is a schematic diagram of the structure of the first retaining rod according to one or more embodiments of the present utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the second retaining rod according to one or more embodiments of the present utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the first counterweight rod according to one or more embodiments of the present utility model;

[0025] Figure 6It is a schematic structural diagram of a second counterweight rod according to one or more embodiments of the utility model;

[0026] Figure 7 It is a schematic structural diagram of a rotating shaft according to one or more embodiments of the present utility model;

[0027] Figure 8 It is an enlarged structural schematic diagram of a connecting ear according to one or more embodiments of the present utility model;

[0028] The components represented by the reference numerals in the figure are:

[0029] 1. Hook; 2. Blocking ring; 3. Counterweight ring; 4. Rotating shaft; 5. First block rod; 6. Second block rod; 7. Connecting ear; 8. First through hole; 9. Limiting groove; 10. Second through hole; 11. First plug-in part; 12. First counterweight rod; 13. Third through hole; 14. Second counterweight rod; 15. Second plug-in part; 16. Shaft; 17. Mounting part; 18. Threaded part; 19. Limiting protrusion. DETAILED DESCRIPTION

[0030] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0031] In a typical implementation of the present invention, Figures 1 - 8 As shown, an anti-drop hook is proposed, comprising: a hook 1 and a locking assembly, a mounting seat is fixedly provided at the opening position of the hook 1, and the locking assembly is hinged to the mounting seat.

[0032] like Figure 2 As shown, the locking assembly includes a retaining ring 2, a counterweight ring 3 and a rotating shaft 4, wherein the retaining ring 2 and the counterweight ring 3 are both U-shaped structures, the retaining ring 2 is located in the opening of the hook 1, the upper part of the main body of the hook 1 passes through the counterweight ring 3, the retaining ring 2 and the counterweight ring 3 intersect, that is, there is a set angle between the retaining ring 2 and the counterweight ring 3, in the free state, the counterweight ring 3 is arranged obliquely downward to pull the retaining ring 2 upward and abut against the hook 1, the rotating shaft 4 is rotatably arranged on the mounting seat of the hook 1, the retaining ring 2 and the counterweight ring 3 are respectively plug-connected to the two ends of the rotating shaft 4 and fixed by nuts, and the mass of the retaining ring 2 is smaller than that of the counterweight ring 3.

[0033] like Figure 7As shown in the figure, the rotating shaft 4 includes a shaft body 16, a mounting portion 17, and a threaded portion 18. At both ends of the shaft body 16, a mounting portion 17 is fixedly provided respectively. The diameter of the mounting portion 17 is smaller than that of the shaft body 16. Along the circumferential direction of the outer wall of the mounting portion 17, a plurality of strip-shaped limiting protrusions 19 are fixedly provided at intervals. The limiting protrusions 19 extend along the axial direction of the mounting portion 17. At one end of the mounting portion 17 away from the shaft body 16, a threaded portion 18 is fixedly provided. The threaded portion 18 has an external thread, and the outer diameter of the threaded portion 18 is not larger than that of the mounting portion 17, for the installation of a nut.

[0034] At the ends of the retaining ring 2 and the counterweight ring 3 for connecting with the rotating shaft 4, connecting ears 7 are fixedly provided respectively, to connect with the rotating shaft 4 through the connecting ears 7. Specifically, a first through hole 8 is provided on the connecting ear 7. A plurality of limiting grooves 9 are provided at intervals in the circumferential direction of the first through hole 8. The limiting grooves 9 communicate with the first through hole 8. The limiting grooves 9 are in the structure of long strip holes. The number of the limiting grooves 9 is the same as that of the limiting protrusions 19 at the corresponding end of the rotating shaft 4 and they correspond one by one. Through the cooperation of the limiting grooves 9 and the limiting protrusions 19, the rotation of the retaining ring 2 and the counterweight ring 3 around the axis is restricted, ensuring the fixed relative angle between the two.

[0035] The length of the mounting portion 17 on the rotating shaft 4 is the same as the total thickness of the two connecting ears 7. Thus, after the connecting ears 7 on the retaining ring 2 and the counterweight ring 3 are connected to the mounting portion 17, the connecting ears 7 on the retaining ring 2 and the counterweight ring 3 can be clamped by the cooperation of the nut and the shaft body 16, to realize the fixed connection between the retaining ring 2, the counterweight ring 3 and the rotating shaft 4, and effectively restrict the relative position between the retaining ring 2 and the counterweight ring 3.

[0036] Since the fixed angle between the retaining ring 2 and the counterweight ring 3 is realized through the cooperation of the limiting grooves 9 and the limiting protrusions 19, and both the limiting grooves 9 and the limiting protrusions 19 are arranged at intervals along the circumferential direction, the angle between the retaining ring 2 and the counterweight ring 3 can be adjusted according to requirements. The adjustment of the angle between the retaining ring 2 and the counterweight ring 3 is convenient, with strong adjustability and wide application range.

[0037] As Figures 3 - 4 shown in the figure, the retaining ring 2 includes a first retaining rod 5 and a second retaining rod 6. Both the first retaining rod 5 and the second retaining rod 6 are in the structure of L-shaped rods. One end of the first retaining rod 5 is fixedly installed with a connecting ear 7, and a second through hole 10 is provided at the other end of the first retaining rod 5; one end of the second retaining rod 6 is fixedly installed with a connecting ear 7, and a first inserting portion 11 is fixedly provided at the other end of the second retaining rod 6. The first retaining rod 5 and the second retaining rod 6 are relatively inserted at both ends of the rotating shaft 4 through the connecting ears 7, and the first inserting portion 11 on the second retaining rod 6 is inserted into the second through hole 10 of the first retaining rod 5, thus realizing the connection between the first retaining rod 5 and the second retaining rod 6, to form a U-shaped and stable retaining ring 2.

[0038] It can be understood that the cross-sections of the second through-hole 10 and the first insertion part 11 can be circular, triangular, quadrilateral and other shapes. There is no excessive limitation on the specific shape here, as long as the cross-sectional shapes of the second through-hole 10 and the first insertion part 11 can be ensured to match each other.

[0039] As Figures 5 - 6 shown, the counterweight ring 3 includes a first counterweight rod 12 and a second counterweight rod 14. Both the first counterweight rod 12 and the second counterweight rod 14 are L-shaped rod structures. A connecting ear 7 is fixedly installed at one end of the first counterweight rod 12, and a third through-hole 13 is provided at the other end of the first counterweight rod 12; a connecting ear 7 is fixedly installed at one end of the second counterweight rod 14, and a second insertion part 15 is fixedly provided at the other end of the second counterweight rod 14. The first counterweight rod 12 and the second counterweight rod 14 are relatively inserted at both ends of the rotating shaft 4 through the connecting ear 7, and the second insertion part 15 on the second counterweight rod 14 is inserted into the third through-hole 13 of the first counterweight rod 12, so as to realize the connection between the first counterweight rod 12 and the second counterweight rod 14 and form a U-shaped and stable counterweight ring 3.

[0040] It can be understood that the cross-sections of the third through-hole 13 and the second insertion part 15 can be circular, triangular, quadrilateral and other shapes. There is no excessive limitation on the specific shape here, as long as the cross-sectional shapes of the third through-hole 13 and the second insertion part 15 can be ensured to match each other.

[0041] The length of the counterweight ring 3 is greater than the length of the retaining ring 2 to ensure that the mass of the counterweight ring 3 is greater than that of the retaining ring 2, which is convenient for the counterweight ring 3 to drive the retaining ring 2 to move. Both the retaining ring 2 and the counterweight ring 3 are split assembly structures, which is convenient for disassembly and assembly and can realize targeted replacement of different parts. For example, when the first stop rod 5 is damaged, only the first stop rod 5 needs to be replaced, effectively reducing the maintenance cost.

[0042] A rubber layer can also be fixedly provided on the outer wall of the retaining ring 2 for abutting against the hook 1, which can not only improve the friction force but also play a role in shock absorption.

[0043] The specific working principle is as follows:

[0044] When it is necessary to connect the hook 1 with the lifting rope, manually lift the counterweight ring 3. The counterweight ring 3 drives the retaining ring 2 to rotate around the axis through the rotating shaft 4, so that the abutting end of the retaining ring 2 (i.e., the end far from the rotating shaft 4) moves in the direction away from the opening of the hook 1 to cancel the locking of the opening of the hook 1;

[0045] After the lifting rope is connected with the hook 1, release the counterweight ring 3. The counterweight ring 3 moves downward under the action of gravity, and then drives the retaining ring 2 to rotate around the axis through the rotating shaft 4, so that the abutting end of the retaining ring 2 tilts upward (i.e., moves in the direction close to the opening of the hook 1), and the abutting end of the retaining ring 2 abuts against the hook 1 to complete the locking of the opening of the hook 1.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-falling hook, comprising: A hook (1) and a locking assembly, characterized in that the locking assembly comprises an intersecting retaining ring (2) and a counterweight ring (3), the retaining ring (2) being located in an opening of the hook (1), the counterweight ring (3) being sleeved on the hook (1) and arranged obliquely downward, a rotating shaft (4) being rotatably arranged on the hook (1), the retaining ring (2) and the counterweight ring (3) being connected to both ends of the rotating shaft (4) through connecting ears (7), the rotating shaft (4) comprising a shaft body (16), both ends of the shaft body (16) being fixed in sequence A mounting portion (17) and a threaded portion (18) are fixedly provided, the mounting portion (17) has a diameter smaller than the shaft body (16), a limiting protrusion (19) is fixedly provided on the mounting portion (17), a first through hole (8) and a limiting groove (9) are provided on the connecting ear (7), the mounting portion (17) is inserted into the first through hole (8), the limiting protrusion (19) is inserted into the limiting groove (9), a nut is threadedly connected to the threaded portion (18), and the nut cooperates with the shaft body (16) to clamp the connecting ear (7).

2. The anti-fall hook according to claim 1, characterized in that: The limiting protrusion (19) is in the shape of an elongated strip and extends along the axial direction of the mounting portion (17). A plurality of limiting protrusions (19) are fixedly arranged on the outer wall of the mounting portion (17) at intervals along the circumferential direction thereof.

3. The anti-fall hook according to claim 2, characterized in that: A plurality of limiting grooves (9) are arranged at intervals upwardly around the first through hole (8); the limiting grooves (9) are connected to the first through hole (8), and the limiting grooves (9) are of a long strip hole structure.

4. The anti-fall hook according to claim 1, characterized in that: The outer diameter of the threaded portion (18) is not larger than that of the mounting portion (17).

5. The anti-fall hook according to claim 1, characterized in that: The length of the mounting portion (17) is the same as the sum of the thicknesses of the two connecting ears (7).

6. The anti-fall hook according to claim 1, characterized in that: The baffle ring (2) comprises a first baffle rod (5) and a second baffle rod (6), both of which are L-shaped, one end of each of which is connected to the rotating shaft (4) via a connecting ear (7), and the other ends of the first baffle rod (5) and the second baffle rod (6) are plug-in connected.

7. The anti-fall hook according to claim 1, characterized in that: The counterweight ring (3) comprises a first counterweight rod (12) and a second counterweight rod (14); the first counterweight rod (12) and the second counterweight rod (14) are both L-shaped; one end of the first counterweight rod (12) and the second counterweight rod (14) are connected to the rotating shaft (4) via a connecting ear (7); and the other ends of the first counterweight rod (12) and the second counterweight rod (14) are plug-in connected.

8. The anti-fall hook according to claim 1, characterized in that: The length of the counterweight ring (3) is greater than that of the retaining ring (2).

9. The anti-fall hook according to claim 1, characterized in that: The retaining ring (2) is used to fix a rubber layer on the outer wall that abuts against the lifting hook (1).

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