Lifting hook structure for crane

Abstract

The utility model relates to the technical field of crane hooks, and discloses a crane hook structure which comprises fixing plates, fixing columns are fixedly connected to the top ends of the close sides of the two fixing plates, lantern rings are fixedly connected to the close sides of the two fixing columns, rotating rods are rotatably connected to the interiors of the lantern rings, and the rotating rods are fixedly connected to the top ends of the two fixing plates. The bottom end of the rotating rod is connected with a connecting rod through a rotating assembly, the bottom end of the connecting rod is fixedly connected with a lifting hook body, the outer wall of the connecting rod is fixedly connected with two fixing blocks, the two fixing blocks are both connected with limiting buckles through reset assemblies, and the bottom ends of the sides, away from each other, of the two fixing blocks are both rotationally connected with limiting discs. The bottom ends of the close sides of the two fixing plates are fixedly connected with connecting blocks. According to the lifting hook, the whole lifting hook rotates in the horizontal direction, the shaking amplitude of a heavy object is reduced, the stability of the lifting hook during object lifting is improved, automatic reset and unhooking prevention of the limiting buckle are achieved, and the lifting safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of crane hook technology, and in particular to a crane hook structure. Background Technology

[0002] In numerous industries such as construction, ports, and logistics, cranes are crucial material handling equipment, and the performance of their hook structures directly affects the safety and efficiency of lifting operations. Hooks need to frequently bear and lift objects of various weights and shapes, and their stable and reliable operation in complex working environments plays a vital role in ensuring smooth production processes and preventing safety accidents.

[0003] Existing crane hook structures have several significant shortcomings. Traditional hooks mostly employ a simple fixed hook design, lacking effective limiting and locking mechanisms when lifting objects of varying sizes and shapes. For example, when lifting long or irregularly shaped objects, the objects can easily slide or shift within the hook, leading to instability during lifting and potentially causing the object to fall off. This is because the internal space of the hook lacks a specific constraint structure, failing to adapt to the diverse lifting needs of different objects. Regarding anti-derailment, existing hooks typically rely solely on the natural curvature of the hook to prevent objects from falling off. However, in actual operation, this simple anti-derailment method is unreliable due to factors such as vibration, swaying, or improper operation, and cannot effectively prevent accidental decoupling. Furthermore, existing hooks cannot automatically adjust their direction to adapt to the direction of gravity during lifting. When the load sways, the hook cannot rotate flexibly accordingly, further aggravating the swing amplitude of the load, increasing operational difficulty and posing a potential threat to surrounding personnel and equipment.

[0004] In response to this technical problem, this application proposes a hook structure for a crane. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a crane hook structure that enables horizontal rotation of the entire hook, avoids misalignment between the hook and the load's gravity direction, reduces the load's swaying amplitude, increases the stability of the hook when lifting objects, and enables automatic reset and release of the limit buckle. This prevents the load from slipping out of the hook opening due to unexpected situations (such as shaking or collisions) during lifting, thereby increasing lifting safety.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A crane hook structure includes fixed plates. Fixed columns are fixedly connected to the top ends of two adjacent sides of the fixed plates. A collar is fixedly connected to the adjacent sides of the two fixed columns. A rotating rod is rotatably connected inside the collar. A connecting rod is connected to the bottom end of the rotating rod via a rotating assembly. A hook body is fixedly connected to the bottom end of the connecting rod. Two fixed blocks are fixedly connected to the outer wall of the connecting rod. Both fixed blocks are connected to limit buckles via a reset assembly. Limit plates are rotatably connected to the bottom ends of the two adjacent sides of the fixed plates. A connecting block is fixedly connected to the bottom ends of the two adjacent sides of the fixed plates.

[0008] Furthermore, the rotating assembly includes a limiting ring fixedly connected to the bottom end of the rotating rod, a plurality of balls are rotatably connected to the bottom end of the rotating rod, a first groove is provided at the top end of the connecting rod, a limiting post is fixedly connected to the top side of the connecting rod, and a second groove is provided on the outer wall of the limiting post.

[0009] Furthermore, the reset assembly includes a rotating shaft rotatably connected to the interior of the two fixed blocks, and reset springs are fixedly connected to both ends of the rotating shaft.

[0010] Furthermore, the outer wall of the ball is rotatably connected to the inner wall of the second slide groove, and the outer wall of the limiting ring is slidably connected to the inner wall of the first slide groove.

[0011] Furthermore, the bottom ends of both limiting buckles are rotatably connected to the outer wall of the rotating shaft, and the top sides of both reset springs are in contact with the inner bottom side of the limiting buckle.

[0012] Furthermore, connecting columns are fixedly connected to both the left and right sides of the connecting block, and the outer walls of the two connecting columns are fixedly connected to the inner walls of the limiting discs. Multiple limiting holes are opened on the opposite side of the two limiting discs, and screws are threaded into the limiting holes.

[0013] Furthermore, the connecting rod extends through the interior of the connecting block.

[0014] Furthermore, a gasket is provided between each of the two limiting discs and the fixing plate.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by rotating the limiting ring and ball on the bottom side of the rotating rod inside the sliding groove one and sliding groove two inside the connecting rod, the horizontal rotation of the entire hook is achieved, which avoids the hook and the weight direction being inconsistent, reduces the swaying amplitude of the weight, and increases the stability of the hook when lifting objects.

[0017] 2. In this utility model, the two reset spring pieces on the outer wall of the fixed block press against the inside of the limit buckle to realize the automatic reset of the limit buckle and prevent it from being dislodged. This avoids the heavy object from falling out of the hook opening due to unexpected situations (such as shaking, collision, etc.) during the hoisting process, thereby increasing the safety of hoisting. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a crane hook structure proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of a resetting mechanism for a crane hook structure proposed in this utility model;

[0020] Figure 3 This is a partial structural diagram of a crane hook structure proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the rotating mechanism of a crane hook structure proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the limiting structure of a crane hook structure proposed in this utility model.

[0023] Legend:

[0024] 1. Fixing plate; 2. Fixing post; 3. Shim; 4. Limit buckle; 5. Hook body; 6. Connecting block; 7. Connecting rod; 8. Rotating rod; 9. Collar; 10. Fixing block; 11. Reset spring; 12. Rotating shaft; 13. Limiting plate; 14. Screw; 15. Limiting hole; 16. Connecting post; 17. Limiting ring; 18. Ball bearing; 19. Slide groove one; 20. Limiting post; 21. Slide groove two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a crane hook structure, including a fixed plate 1. Fixed posts 2 are fixedly connected to the top ends of two adjacent sides of the fixed plates 1. A collar 9 is fixedly connected to the adjacent sides of the two fixed posts 2. A rotating rod 8 is rotatably connected inside the collar 9. A connecting rod 7 is connected to the bottom end of the rotating rod 8 via a limiting ring 17. A hook body 5 is fixedly connected to the bottom end of the connecting rod 7. Two fixed blocks 10 are fixedly connected to the outer wall of the connecting rod 7. Both fixed blocks 10 are connected to limiting buckles 4 via reset springs 11. Limiting discs 13 are rotatably connected to the bottom ends of the two adjacent sides of the fixed plates 1. A connecting block 6 is fixedly connected to the bottom ends of the two adjacent sides of the fixed plates 1. The outer wall of a ball bearing 18 is rotatably connected to the inner wall of a second slide groove 21, and the outer wall of the limiting ring 17 is slidably connected to the inner wall of a first slide groove 19. The bottom ends of the two limiting buckles 4 are rotatably connected to the outer wall of a rotating shaft 12, and the top sides of the two reset springs 11 are in contact with the inner bottom sides of the limiting buckles 4. Connecting posts 16 are fixedly connected to both sides of the connecting block 6. The outer walls of the two connecting posts 16 are fixedly connected to the inner walls of the limiting plates 13. Multiple limiting holes 15 are opened on the opposite side of the two limiting plates 13, and screws 14 are threaded into the limiting holes 15. The connecting rod 7 passes through the interior of the connecting block 6. Gaskets 3 are provided between the two limiting plates 13 and the fixing plate 1.

[0027] Specifically, when faced with the need to lift objects from both ends of the hook body 5, the operator first manually pulls the two limit buckles 4 downwards. Then, the object to be lifted is passed through the gap between the hook body 5 and the limit buckles 4 in the pulled-down state, thus suspending the object inside the hook body 5. When the downward pressure disappears, the two reset springs 11, relying on the accumulated elastic potential energy, drive themselves back to their initial positions, along with the limit buckles 4. At this point, under the limiting action at both ends of the hook body 5, the reset limit buckles 4 are in close contact with both ends of the hook body 5, forming a locking structure that effectively locks the object and prevents it from accidentally falling off during lifting. The hook body 5 as a whole can rotate flexibly during lifting, ensuring that the direction of the hook body 5 is always consistent with the direction of the object's gravity, effectively reducing the swaying amplitude of the object and improving the stability and safety of the lifting operation.

[0028] Reference Figure 5 The bottom end of the rotating rod 8 is fixedly connected to a limiting ring 17. Multiple balls 18 are rotatably connected to the bottom end of the rotating rod 8. The top end of the connecting rod 7 is provided with a first groove 19. The top side of the connecting rod 7 is fixedly connected to a limiting post 20. The outer wall of the limiting post 20 is provided with a second groove 21.

[0029] Specifically, the limiting ring 17 at the bottom of the rotating rod 8 can rotate freely in the first groove 19 opened inside the connecting rod 7, while the ball bearing 18 inside the rotating rod 8 can rotate in the second groove 21 opened on the outer wall of the limiting post 20.

[0030] Reference Figure 2 The two fixed blocks 10 are rotatably connected to a rotating shaft 12, and a reset spring 11 is fixedly connected to both the front and rear ends of the rotating shaft 12.

[0031] Specifically, after the hanging operation is completed, the two limit buckles 4 will begin the reset process under the action of the two reset springs 11 set inside them. When the limit buckles 4 were pulled down earlier, the two reset springs 11 underwent elastic deformation due to the downward pressure, and at the same time accumulated elastic potential energy.

[0032] Working principle: When it is necessary to lift objects at both ends of the hook body 5, the operator can manually pull down the two limit buckles 4, and then hang the object to be lifted through the gap between the hook body 5 and the limit buckles 4 inside the hook body 5. After hanging, the two limit buckles 4 will reset under the action of the two reset springs 11 set inside. When the two reset springs 11 are subjected to downward pressure, they will undergo elastic deformation and generate elastic properties. When the downward pressure is removed, the two reset springs 11 will return to their initial position under the influence of elastic potential energy, and at the same time drive the limit buckles. 4. Returning to the initial position, under the limiting action at both ends of the hook body 5, the two limiting buckles 4 contact the two ends of the hook body 5 to form a lock, locking the hoisted object; during the hoisting process, in order to keep the direction of the hook body 5 consistent with the direction of the weight of the object and reduce the swaying amplitude of the object, the limiting ring 17 at the bottom of the rotating rod 8 can rotate inside the sliding groove 19 opened inside the connecting rod 7, and at the same time, the ball 18 inside the rotating rod 8 can rotate inside the sliding groove 21 opened on the outer wall of the limiting post 20. Therefore, the entire hook body 5 can rotate during the hoisting process to ensure that the direction of gravity is consistent.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hook structure for a crane comprising a fixing plate (1), characterized in that: Two said fixed plate (1) near one side top end are fixedly connected with fixed column (2), two said fixed column (2) near one side fixedly connected with the lantern ring (9), the lantern ring (9) inside rotationally connected with rotating rod (8), the rotating rod (8) bottom is connected with connecting rod (7) through rotating assembly, the connecting rod (7) bottom fixedly connected with the hook body (5), the connecting rod (7) outer wall is fixedly connected with two fixed blocks (10), two said fixed blocks (10) are connected with limiting buckle (4) through reset assembly, two said fixed plate (1) are away from one side bottom and are rotationally connected with limiting disc (13), two said fixed plate (1) near one side bottom fixedly connected with connecting block (6).

2. A hook structure for a crane according to claim 1, characterized in that: The rotating assembly includes a limiting ring (17) fixedly connected with the bottom end of the rotating rod (8), a plurality of rolling balls (18) rotationally connected inside the bottom end of the rotating rod (8), a sliding groove one (19) formed in the top end of the connecting rod (7), a limiting column (20) fixedly connected with the top side of the connecting rod (7), and a sliding groove two (21) formed in the outer wall of the limiting column (20).

3. A hook structure for a crane according to claim 1, characterized in that: The reset assembly includes a rotating shaft (12) rotationally connected inside two said fixed blocks (10), and reset spring sheets (11) fixedly connected with the front and rear ends of the rotating shaft (12).

4. A hook structure for a crane according to claim 2, characterized in that: The outer wall of the rolling ball (18) is rotationally connected to the inner wall of the sliding groove two (21), and the outer wall of the limiting ring (17) is slidingly connected to the inner wall of the sliding groove one (19).

5. A hook structure for a crane according to claim 3, characterized in that: The bottom end of two said limiting buckles (4) is rotationally connected to the outer wall of the rotating shaft (12), and the top side of two said reset spring sheets (11) is in contact with the inner bottom side of the limiting buckle (4).

6. A hook structure for a crane according to claim 1, characterized in that: The left and right sides of the connecting block (6) are fixedly connected with connecting columns (16), and the outer walls of two said connecting columns (16) are fixedly connected to the inner walls of two said limiting discs (13). Two said limiting discs (13) are away from one side and are provided with a plurality of limiting holes (15), and the limiting holes (15) are internally threadedly connected with screws (14).

7. A hook structure for a crane according to claim 1, characterized in that: The connecting rod (7) penetrates the inside of the connecting block (6).

8. A hook structure for a crane according to claim 1, characterized in that: Two said limiting discs (13) and fixed plate (1) are provided with spacers (3) therebetween.

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