Lifting device with stable locking structure

Abstract

The utility model belongs to the technical field of lifting appliance, concretely relates to lifting appliance with stable locking structure, including crossbeam, the both ends bottom end of crossbeam is connected with lifting hook through iron chain, the top of crossbeam is connected with lifting ring, the bottom of crossbeam is connected with the support block of the '' character U '' shape, the inside of support block is rotatably connected with bidirectional screw rod through bearing, the surface of bidirectional screw rod is connected with the thread sleeve of screw thread, the bottom of thread sleeve is connected with first recessed block, the inside of first recessed block is rotatably connected with support rod. The utility model discloses through the collaborative cooperation between support block, bidirectional screw rod, thread sleeve, first recessed block, support rod, second recessed block and lifting plate, can effectively promote lifting appliance locking stability, ensure that the hooking locking state of hook and motor support is steady and reliable, so as to eliminate the risk that hook and motor support accidentally separate due to iron chain swing in the hoisting process of hoisting equipment, significantly improve operation safety and locking stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of spreaders, and particularly relates to a spreader with a stable locking structure. Background Art

[0002] As a core device used for lifting heavy objects in hoisting machinery, the function of a spreader is to realize safe and efficient lifting, transporting and positioning operations by directly or indirectly connecting the lifted object. As a key component of the hoisting system, the spreader must be able to bear the weight of heavy objects, dynamic loads and environmental stresses, so its design needs to balance strength, rigidity and stability.

[0003] However, in the actual use process, there is such a problem: since the spreader needs to be lowered by the hoisting equipment first to connect the hook to the motor support, and then lifted for hoisting. After the hook is connected to the motor support, during the ascending stage of the spreader, the iron chain will be driven to move first, and the movement of the iron chain will drive the hook to move first. The moving hook is easy to separate from the motor support, which significantly reduces the locking stability and brings potential safety hazards to the hoisting operation. Utility Model Content

[0004] The purpose of the utility model is to provide a spreader with a stable locking structure, aiming to solve the problem in the prior art that when the existing spreader needs to be lowered first to connect the hook with the motor support, and then lifted for hoisting, after the hook is connected with the motor support, during the ascending stage of the spreader, the iron chain is driven to move first, and the movement of the iron chain will drive the hook to move first, the moving hook is easy to separate from the motor support, thereby significantly reducing the locking stability and bringing safety hazards to the hoisting operation.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a spreader with a stable locking structure, comprising a cross beam, wherein the bottom ends of the two ends of the cross beam are connected with hooks through iron chains, the top end of the cross beam is connected with a lifting ring, the bottom end of the cross beam is connected with a "匚"-shaped support block, the interior of the support block is rotatably connected with a two-way threaded rod through a bearing, the surface of the two-way threaded rod is threadedly connected with a thread sleeve, the bottom end of the thread sleeve is connected with a first concave block, the interior of the first concave block is rotatably connected with a support rod, the end of the support rod is rotatably connected with a second concave block, and the bottom end of the second concave block is connected with a lifting plate.

[0006] As a preferred option of the spreader with a stable locking structure of the utility model, an opening adapted to the first concave block is opened on the surface of the support block.

[0007] As a preferred option of the spreader with a stable locking structure of the utility model, the bottom end of the thread sleeve fits the inner wall of the support block.

[0008] As a preferred embodiment of the lifting device with a stable locking structure of this utility model, the lifting plate can form a threaded transmission with the bidirectional threaded rod through the second concave block, the support rod, the first concave block and the threaded sleeve.

[0009] As a preferred embodiment of the lifting device with a stable locking structure of this utility model, the lifting plate can form a lifting connection with the support block through the second concave block, the support rod and the first concave block.

[0010] As a preferred embodiment of the lifting device with a stable locking structure of this utility model, the two ends of the lifting plate are connected through a "T"-shaped protrusion, the surface of the protrusion is fitted with a spring, the bottom end of the protrusion is threaded with a circular block, and the bottom end of the circular block is connected with a buffer plate.

[0011] As a preferred embodiment of the lifting device with a stable locking structure of this utility model, the buffer plate can be elastically telescopically connected to the lifting plate through a spring.

[0012] Compared with the prior art, the beneficial effects of this utility model are: By coordinating the support block, the double-threaded rod, the threaded sleeve, the first concave block, the support rod, the second concave block, and the lifting plate, the locking stability of the lifting device can be effectively improved. After the lifting device is lowered to the designated position by the lifting equipment, the operator first hooks the hook to the motor bracket. Then, the double-threaded rod is rotated. At this time, the threaded sleeve will move away from each other along the threaded trajectory on the surface of the double-threaded rod. The movement of the threaded sleeve will drive the first concave block to move synchronously. The displacement of the first concave block will push the support rod to rotate and open. The rotation of the support rod will push the second concave block to move downward. The descent of the second concave block will drive the lifting plate to descend synchronously until the lifting plate contacts the surface of the motor bracket and generates a thrust. This thrust causes the crossbeam to rise, thereby tightening the chain and the hook, ensuring that the hook and motor bracket are locked in a stable and reliable state. This can eliminate the risk of the hook accidentally disengaging from the motor bracket due to the swaying of the chain during the lifting process, significantly improving operational safety and locking stability.

[0013] Through the coordinated operation of the buffer plate, circular block, spring, and protruding column, when the operator lowers the lifting plate to contact the motor bracket, the lifting plate will first bring the buffer plate into contact with the motor bracket. Subsequently, after being compressed, the buffer plate will drive the circular block to compress the spring, causing the spring to contract. The elastic contraction of the spring creates a certain buffer space between the buffer plate and the lifting plate, thereby effectively preventing damage to the motor bracket due to excessive compression. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 is a schematic three-dimensional structural diagram of the present utility model; Figure 2 is a schematic front perspective structural view of the present utility model; Figure 3 is a schematic view showing a connecting structure of a supporting block, a lifting plate and a buffer plate of the present utility model; Figure 4 is a schematic view showing a connecting structure of a convex column, a spring and a circular block of the present utility model.

[0015] In the figures: 1, cross beam; 2, lifting hook; 3, lifting ring; 4, supporting block; 5, bidirectional threaded rod; 6, threaded sleeve; 7, first concave block; 8, supporting rod; 9, lifting plate; 10, second concave block; 11, convex column; 12, spring; 13, circular block; 14, buffer plate. DETAILED DESCRIPTION

[0016] Hereinafter, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0017] Please refer to Figures 1-4 , the present utility model provides the following technical solution: a spreader with a stable locking structure, comprising a cross beam 1, the bottom ends of both ends of the cross beam 1 are connected with lifting hooks 2 through iron chains, the top end of the cross beam 1 is connected with a lifting ring 3, the bottom end of the cross beam 1 is connected with an "匚"-shaped supporting block 4, the interior of the supporting block 4 is rotatably connected with a bidirectional threaded rod 5 through a bearing, the surface of the bidirectional threaded rod 5 is threadedly connected with a threaded sleeve 6, the bottom end of the threaded sleeve 6 is connected with a first concave block 7, the interior of the first concave block 7 is rotatably connected with a supporting rod 8, the end of the supporting rod 8 is rotatably connected with a second concave block 10, the bottom end of the second concave block 10 is connected with a lifting plate 9. An opening adapted to the first concave block 7 is provided on the surface of the supporting block 4. The bottom end of the threaded sleeve 6 fits against the inner wall of the supporting block 4. The lifting plate 9 can form threaded transmission with the bidirectional threaded rod 5 through the second concave block 10, the supporting rod 8, the first concave block 7 and the threaded sleeve 6. The lifting plate 9 can form lifting connection with the supporting block 4 through the second concave block 10, the supporting rod 8 and the first concave block 7.

[0018] In practical use, the lifting device mainly consists of three parts: a crossbeam 1, a hook 2, and a lifting ring 3. After the lifting device is lowered to the designated position with the help of the lifting equipment, the operator first hooks the hook 2 to the motor bracket. Then, the double-threaded rod 5 is rotated. At this time, the threaded sleeve 6 will move along the threaded trajectory on the surface of the double-threaded rod 5 in a direction away from each other. When the threaded sleeve 6 moves, it will drive the first concave block 7 to move synchronously. The displacement of the first concave block 7 will push the support rod 8 to rotate and open. The rotation of the support rod 8 will then push the second concave block 10 to move downward. When the second concave block 10 descends, it will drive the lifting plate 9 to descend synchronously until the lifting plate 9 contacts the surface of the motor bracket and generates a thrust. This thrust causes the crossbeam 1 to rise, thereby tightening the iron chain and the hook 2, ensuring that the hook 2 and the motor bracket are locked in a stable and reliable state. In this way, the risk of the hook 2 accidentally disengaging from the motor bracket due to the swaying of the iron chain during the lifting process can be eliminated, significantly improving the safety of the operation and the stability of the locking.

[0019] Subsequently, the lifting equipment was started. Under the traction of the lifting equipment, the lifting ring 3 began to rise, which in turn drove the crossbeam 1 to rise synchronously. The rise of the crossbeam 1 would then pull the hook 2 to move upward. Finally, the hook 2 drove the motor bracket to rise steadily.

[0020] It is worth noting that the bidirectional threaded rod 5 is driven by a coupling connected to a servo motor, which is mounted on the outer wall of the support block 4, thus facilitating the rotation of the bidirectional threaded rod 5.

[0021] Preferably, a T-shaped protrusion 11 is connected through both ends of the lifting plate 9. A spring 12 is sleeved on the surface of the protrusion 11. A circular block 13 is threaded to the bottom end of the protrusion 11. A buffer plate 14 is connected to the bottom end of the circular block 13. The buffer plate 14 can form an elastic telescopic connection with the lifting plate 9 through the spring 12.

[0022] In practical use, when the operator manipulates the lifting plate 9 to descend to contact the motor bracket, the lifting plate 9 will first make the buffer plate 14 contact the motor bracket. Then, after being squeezed, the buffer plate 14 will drive the circular block 13 to squeeze the spring 12 together, causing the spring 12 to contract. The elastic contraction of the spring 12 creates a certain buffer space between the buffer plate 14 and the lifting plate 9, thereby effectively avoiding damage to the motor bracket due to excessive compression.

[0023] It is worth noting that the protruding post 11 and the circular block 13 are connected by threads. When the elasticity of the spring 12 is insufficient, the protruding post 11 can be rotated to separate from the circular block 13, and then the spring 12 can be replaced.

[0024] Working principle: After the lifting device slowly descends to the designated position, the operator immediately starts the operation. First, the hook 2 is firmly hooked to the motor bracket. Then, the operator starts to rotate the double-threaded rod 5. At this time, the threaded sleeve 6 moves smoothly away from each other along the threaded trajectory on the surface of the double-threaded rod 5.

[0025] As the threaded sleeve 6 moves, it will cause the first concave block 7 to move synchronously. The displacement of the first concave block 7 generates a pushing force, causing the support rod 8 to rotate and open. The rotation of the support rod 8 will push the second concave block 10 to move downward. When the second concave block 10 descends, it will also cause the lifting plate 9 to descend synchronously.

[0026] When the operator manipulates the lifting plate 9 to descend continuously until it contacts the motor bracket, the lifting plate 9 will first bring the buffer plate 14 into contact with the motor bracket. Subsequently, after being compressed, the buffer plate 14 will drive the circular block 13 to compress the spring 12, causing the spring 12 to contract. The appropriate elastic contraction of the spring 12 forms a certain buffer space between the buffer plate 14 and the lifting plate 9, thereby effectively avoiding damage to the motor bracket due to excessive compression.

[0027] At the same time, the thrust generated by the contact between the lifting plate 9 and the motor bracket causes the crossbeam 1 to rise, thereby tightening the chain and hook 2, ensuring that the hook 2 and the motor bracket are securely and reliably locked. In this way, the risk of the hook 2 accidentally separating from the motor bracket due to the shaking of the chain during the lifting process can be completely eliminated, significantly improving the safety of the operation and the stability of the locking.

[0028] Subsequently, the operator started the lifting equipment. Under the powerful traction of the lifting equipment, the lifting ring 3 began to rise slowly, which in turn drove the crossbeam 1 to rise synchronously. The rise of the crossbeam 1 would then pull the hook 2 to move upward. Finally, the hook 2 drove the motor bracket to rise steadily.

[0029] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting device with a stable locking structure, including a crossbeam (1), characterized in that: Two ends of a bottom end of the cross beam (1) are connected with a hook (2) through a iron chain, a top end of the cross beam (1) is connected with a lifting ring (3), and a bottom end of the cross beam (1) is connected with a "匚"-shaped support block (4); A bidirectional threaded rod (5) is rotatably connected inside the support block (4) through a bearing, a surface of the bidirectional threaded rod (5) is threadedly connected with a thread sleeve (6), a bottom end of the thread sleeve (6) is connected with a first concave block (7), a support rod (8) is rotatably connected inside the first concave block (7), an end portion of the support rod (8) is rotatably connected with a second concave block (10), and a bottom end of the second concave block (10) is connected with a lifting plate (9).

2. The lifting device with a stable locking structure according to claim 1, characterized in that: A surface of the support block (4) is provided with an opening adapted to the first concave block (7).

3. The lifting device with a stable locking structure according to claim 1, characterized in that: A bottom end of the thread sleeve (6) fits against an inner wall of the support block (4).

4. The lifting device with a stable locking structure according to claim 1, characterized in that: The lifting plate (9) can form a thread transmission with the bidirectional threaded rod (5) via the second concave block (10), the support rod (8), the first concave block (7) and the thread sleeve (6).

5. The lifting device with a stable locking structure according to claim 1, characterized in that: The lifting plate (9) can form a lifting connection with the support block (4) via the second concave block (10), the support rod (8) and the first concave block (7).

6. The lifting device with a stable locking structure according to claim 1, characterized in that: Two ends of the lifting plate (9) are through-connected with a "T"-shaped convex column (11), a spring (12) is sleeved on a surface of the convex column (11), a bottom end of the convex column (11) is threadedly connected with a circular block (13), and a bottom end of the circular block (13) is connected with a buffer plate (14).

7. The lifting device with a stable locking structure according to claim 6, characterized in that: The buffer plate (14) can form an elastic telescopic connection with the lifting plate (9) via the spring (12).

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