Irregular large workpiece hoisting tool

Abstract

The utility model discloses an irregular large workpiece hoisting tool which comprises an inner frame, at least one long extension frame and at least one short extension frame, the long extension frame and the short extension frame are respectively arranged on two opposite sides of the inner frame, a plurality of upper hanging rings used for being connected with hoisting equipment are arranged on the top surface of the inner frame, and a plurality of lower hanging rings used for being connected with the hoisting equipment are arranged on the top surface of the inner frame. The bottom face of the inner frame, the bottom face of the long extension frame and the bottom face of the short extension frame are each provided with a plurality of lower hanging rings used for fixing or hanging workpieces. The lifting appliance has the advantages of being capable of lifting irregular large workpieces and high in applicability.

Description

A lifting fixture for irregular large workpieces Technical Field

[0001] This utility model relates to the field of lifting fixture technology, and in particular to a lifting fixture for irregular large workpieces. Background Technology

[0002] In modern industrial production, for workpieces with regular shapes and a clear center of gravity, standard tooling such as universal slings, hooks, electromagnetic chucks, or rigid lifting beams can be used. By simply and symmetrically arranging the lifting points, the lifting operation can be completed conveniently and safely. The center of gravity is easy to determine, the lifting points are clear, the force is evenly distributed, and the whole process is efficient and safe.

[0003] However, in actual production and assembly processes, it is often necessary to handle a large number of large workpieces with irregular shapes, complex structures, and centers of gravity deviating from their geometric centers, such as large turbine housings, irregular castings and forgings, special-shaped steel structural components, large vehicle chassis, or wind turbine blades. Traditional lifting devices and methods for these types of irregular large workpieces have the following shortcomings:

[0004] 1. Difficulty in determining the center of gravity and poor balance: The mass distribution of irregular workpieces is extremely uneven, and the position of their center of gravity is often difficult to pinpoint accurately through simple visual inspection or calculation. If conventional symmetrical hoisting methods are used, the workpiece is prone to unexpected tilting, swaying, or even overturning during hoisting due to an unstable center of gravity. This not only threatens the workpiece itself but also poses serious safety hazards to on-site workers and surrounding equipment.

[0005] 2. Poor applicability and low economic efficiency: For a specific type of irregular workpiece, existing technologies sometimes design and manufacture dedicated lifting fixtures. However, these "tailor-made" dedicated toolings usually have a fixed structure and extremely limited adjustment range. Once the size, shape, or weight of the workpiece changes, the tooling becomes unusable, exhibiting extremely poor versatility. Frequently designing and manufacturing dedicated tooling for different workpieces not only leads to a sharp increase in manufacturing costs but also significantly reduces production flexibility and operational efficiency.

[0006] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lifting fixture that can lift irregular large workpieces and has high applicability.

[0008] This utility model is achieved through the following technical solution:

[0009] To solve the above-mentioned technical problems, this utility model provides a lifting fixture for irregular large workpieces, including an inner frame, at least one long outer extension frame and at least one short outer extension frame. The long outer extension frame and the short outer extension frame are respectively arranged on opposite sides of the inner frame. The top surface of the inner frame is provided with a plurality of upper hanging rings for connecting lifting equipment. The bottom surface of the inner frame, the bottom surface of the long outer extension frame and the bottom surface of the short outer extension frame are all provided with a plurality of lower hanging rings for fixing or suspending workpieces.

[0010] In order to further solve the technical problems to be solved by this utility model, the present utility model provides an irregular large workpiece lifting fixture, wherein the inner frame includes two long beams arranged parallel to each other, and several short beams connected between the two long beams.

[0011] In order to further solve the technical problem to be solved by this utility model, in the irregular large workpiece lifting fixture provided by this utility model, the long extension is mounted on the outside of one of the long beams; the short extension is mounted on the outside of another long beam.

[0012] To further address the technical problems to be solved by this utility model, the present utility model provides a lifting fixture for irregular large workpieces, wherein the number of long extension frames located on the outside of one of the long beams is two and distributed at both ends of the long beam; and the number of short extension frames located on the outside of the other long beam is two and distributed at both ends of the long beam.

[0013] To further address the technical problems to be solved by this utility model, this utility model provides a lifting fixture for irregular large workpieces, wherein the long extension frame includes a first outer beam and a first connecting beam connecting the first outer beam and the corresponding long beam.

[0014] To further address the technical problems to be solved by this utility model, this utility model provides a lifting fixture for irregular large workpieces, wherein the short outer frame includes a second outer beam and a second connecting beam connecting the second outer beam and the corresponding long beam.

[0015] In order to further solve the technical problem to be solved by this utility model, the number of upper hanging rings on the top surface of the inner frame in the irregular large workpiece lifting fixture provided by this utility model is at least three.

[0016] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a lifting fixture for irregular large workpieces, wherein the lower hanging ring is distributed at intervals along the length direction of the bottom surface of the inner frame, the bottom surface of the long outer frame and the bottom surface of the short outer frame.

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

[0018] This utility model organically combines an asymmetrical frame structure with a dual adjustable lifting point system. By setting extension frames of varying lengths, it forms an asymmetrical lifting point coverage area that flexibly adapts to the workpiece's contour. Simultaneously, by densely arranging lower hanging rings at the bottom of the entire frame and setting multiple optional upper hanging rings at the top, it achieves a collaborative operation mode where "the lower lifting points conform to the workpiece's shape, and the upper lifting points balance the overall center of gravity." This design effectively solves the industry pain points of traditional lifting tools when dealing with irregular, large workpieces, such as difficulty in finding lifting points, unstable center of gravity, and easy damage to the workpiece. Therefore, it has outstanding advantages such as strong applicability, high safety and reliability, good versatility, and significantly improved operating efficiency. Attached Figure Description

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 is a three-dimensional structural schematic diagram of this utility model (viewed from top to bottom);

[0021] Figure 2 is a second three-dimensional structural schematic diagram of this utility model (viewed from bottom to top);

[0022] Figure 3 is a schematic diagram of the usage state of this utility model. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 3. This embodiment provides a lifting fixture for irregular large workpieces. The fixture is a highly flexible and adaptable frame structure to cope with workpieces of different shapes and center of gravity positions.

[0025] As shown in Figures 1 and 2, the lifting fixture includes an inner frame 1 as its base, at least one long outer extension 2 extending from one side of the inner frame 1, and at least one short outer extension 3 extending from the opposite side of the inner frame 1. The long outer extension 2 and the short outer extension 3 have different lengths, forming an asymmetrical design. This asymmetrical layout allows the lifting point coverage of the entire fixture to no longer be limited to a regular rectangular area, thus enabling better matching of the contours and mass distribution of irregular workpieces.

[0026] Several upper hanging rings 4 are provided on the top surface of the inner frame 1. These upper hanging rings 4 are the interfaces for connecting the entire tooling to lifting equipment such as cranes and overhead cranes (usually connected by lifting ropes). Several lower hanging rings 5 ​​are provided on the bottom surface of the inner frame 1, the bottom surface of the long outer frame 2, and the bottom surface of the short outer frame 3. These lower hanging rings 5 ​​are used to connect to the workpiece to be lifted by means of lifting ropes, chains, or special clamps.

[0027] Specifically, in order to ensure the strength and rigidity of the overall structure, as shown in Figures 1 and 2, the inner frame 1 is preferably formed by welding or bolting together two parallel long beams 11 and several short beams 12 vertically connected between the two long beams 11, thus forming a stable and reliable rectangular frame.

[0028] To achieve asymmetrical lifting point extension, the long extension frame 2 is located on the outside of one of the long beams 11, while the short extension frame 3 is located on the outside of the other opposing long beam 11. This design allows one side of the tooling to have a longer lifting point extension distance, while the other side is relatively shorter.

[0029] In this preferred embodiment, to achieve more stable and extensive support, there are two long extension frames 2 located on the outside of one long beam 11, and they are respectively located near both ends of the long beam 11; similarly, there are also two short extension frames 3 located on the outside of another long beam 11, and they are also respectively located near both ends of the long beam 11.

[0030] Furthermore, to ensure the structural strength and connection reliability of the long outer frame 2 and the short outer frame 3, their specific structures are shown in Figure 1. The long outer frame 2 includes a first outer beam 21 and at least one first connecting beam 22 for connecting the first outer beam 21 and the corresponding long beam 11. Similarly, the short outer frame 3 includes a second outer beam 31 and at least one second connecting beam 32 for connecting the second outer beam 31 and the corresponding long beam 11.

[0031] To achieve balance adjustment during the lifting process, the number of upper hanging rings 4 on the top surface of the inner frame 1 is preferably at least three, and more preferably four, and they are not collinearly distributed. For example, multiple upper hanging rings 4 can be set at the four corners or the center line of the inner frame 1. By selecting different upper hanging rings 4 (e.g., using three-point or four-point lifting) to connect with the lifting equipment, the lifting posture of the entire tooling can be actively adjusted so that its main lifting point is aligned with the actual center of gravity of the "tooling + workpiece" system, thereby ensuring stable lifting.

[0032] To maximize the possibility of connection with irregular workpieces, the lower hanging rings 5 ​​are preferably densely distributed at certain intervals along the length direction of the bottom surfaces of the long beams 11 and short beams 12 of the inner frame 1, the bottom surface of the first outer beam 21 of the long outer frame 2, and the bottom surface of the second outer beam 31 of the short outer frame 3. This provides the operator with an extremely wide range of lifting point options.

[0033] Working principle and beneficial effects:

[0034] The working principle of this utility model is as follows:

[0035] When lifting an irregularly shaped large workpiece, the operator first moves the lifting fixture above the workpiece. Based on the actual shape of the workpiece and the estimated center of gravity, a suitable lower hanging ring 5 is selected, and the workpiece is connected to the bottom of the fixture at multiple points using lifting ropes or chains.

[0036] For example, if one side of the workpiece is particularly heavy or protruding, the operator can choose to attach more lifting ropes to the lower hanging ring 5 on that side. If that side corresponds to the long outer frame 2, its longer extension distance can better cover the protruding part of the workpiece, providing more stable support. Conversely, the lifting points under the inner frame 1 or the short outer frame 3 can be utilized. Because the lower hanging rings 5 ​​are widely and densely distributed, a suitable combination can always be found to securely and evenly "hold" or "grip" the workpiece.

[0037] After the workpiece and tooling are connected, the operator, based on the new overall center of gravity of the "tooling + workpiece" assembly, selects one or more upper hanging rings 4 on the top of the inner frame 1 and connects them to the lifting equipment via hoisting ropes. By selecting a combination of upper hanging rings 4, it can be ensured that the overall lifting point is exactly above the overall center of gravity, thereby achieving stable and safe lifting of the workpiece and effectively avoiding the risks of tilting, swaying, and overturning.

[0038] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0039] 1. High adaptability: Through the asymmetrical long and short extension frame design and dense hanging ring layout, the selection range and coverage area of ​​the lifting points are greatly expanded, which can adapt to large workpieces with irregular shape and off-center center of gravity, and has extremely high versatility.

[0040] 2. High safety: By flexibly selecting the combination of upper and lower hanging rings, the center of gravity of the workpiece can be precisely matched, ensuring the stability and balance of the lifting process, avoiding safety accidents caused by unstable center of gravity, and also reducing local damage to the workpiece caused by improper selection of lifting points.

[0041] 3. Flexible operation and high efficiency: There is no need to customize special lifting tools for every irregular workpiece, which saves a lot of design and manufacturing costs, reduces the frequency of tooling changes, and significantly improves the efficiency of production and assembly operations.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art should understand that any equivalent substitutions, modifications, or improvements made within the spirit and principles of the present utility model, such as changing the specific dimensions and quantity of the long and short extension frames, adding or adjusting the position of the hanging rings, etc., should be included within the protection scope claimed by the claims of the present utility model.

Claims

1. A lifting fixture for irregularly shaped large workpieces, characterized in that: It includes an inner frame (1), at least one long outer frame (2) and at least one short outer frame (3). The long outer frame (2) and the short outer frame (3) are respectively located on opposite sides of the inner frame (1). The top surface of the inner frame (1) is provided with several upper hanging rings (4) for connecting lifting equipment. The bottom surface of the inner frame (1), the bottom surface of the long outer frame (2) and the bottom surface of the short outer frame (3) are all provided with several lower hanging rings (5) for fixing or suspending workpieces.

2. The lifting fixture for irregular large workpieces according to claim 1, characterized in that: The inner frame (1) includes two long beams (11) arranged parallel to each other, and several short beams (12) connected between the two long beams (11).

3. The lifting fixture for irregular large workpieces according to claim 2, characterized in that: The long extension frame (2) is located on the outside of one of the long beams (11); the short extension frame (3) is located on the outside of the other long beam (11).

4. The lifting fixture for irregular large workpieces according to claim 3, characterized in that: Two long extension frames (2) are provided on the outside of one of the long beams (11) and distributed at both ends of the long beam (11); two short extension frames (3) are provided on the outside of the other long beam (11) and distributed at both ends of the long beam (11).

5. The lifting fixture for irregular large workpieces according to claim 1, characterized in that: The long extension frame (2) includes a first outer beam (21) and a first connecting beam (22) connecting the first outer beam (21) and the corresponding long beam (11).

6. The lifting fixture for irregular large workpieces according to claim 1, characterized in that: The short extension frame (3) includes a second outer beam (31) and a second connecting beam (32) connecting the second outer beam (31) and the corresponding long beam (11).

7. The lifting fixture for irregular large workpieces according to claim 1, characterized in that: The number of hanging rings (4) on the top surface of the inner frame (1) is at least three.

8. The lifting fixture for irregular large workpieces according to claim 1, characterized in that: The lower hanging ring (5) is distributed at intervals along the length of the bottom surface of the inner frame (1), the bottom surface of the long outer frame (2), and the bottom surface of the short outer frame (3).

Images