A steel plate sling

Abstract

The application relates to the technical field of plate hoisting equipment, in particular to a steel plate lifting appliance. The steel plate lifting appliance comprises a ball core shaft connected with hoisting equipment, a swing disc sleeved with the outer side of the ball core shaft and rotationally connected around the ball center of the ball core shaft, a first adsorption disc installed on the ball core shaft, and a second adsorption disc installed on the swing disc and having a swing angle with the swing disc so that the adsorption surface of the second adsorption disc abuts against the adsorbed member. The steel plate lifting appliance can adsorb not only conventional flat workpieces but also uneven workpieces and three-dimensional curved surface workpieces.

Description

Technical Field

[0001] This application relates to the field of plate lifting equipment technology, and in particular to a steel plate lifting tool. Background Technology

[0002] Electromagnetic chucks, with their significant advantages such as strong suction, convenient control, and minimal damage to workpiece surfaces, have been widely used in industrial applications such as batch lifting of steel workpieces and loading / unloading in automated production lines. Lifting devices made using electromagnetic chucks can achieve rapid adsorption and release of workpieces, significantly improving material handling efficiency. In practical applications, for larger and heavier workpieces, the limited suction power per unit area of ​​the electromagnetic chuck often necessitates the use of multiple chucks working in tandem. The conventional approach is to fix multiple chucks onto a rigid lifting beam, ensuring that each chuck simultaneously contacts and adsorbs the workpiece during lifting. The normal operation of this multi-chuck lifting device based on a rigid beam relies on a crucial prerequisite: the adsorption end faces of all chucks must be in the same plane, and the axes of each chuck must be strictly perpendicular to the workpiece surface.

[0003] However, electromagnetic chucks have high requirements for the surface flatness of the workpiece. For workpieces with uneven surfaces such as warped surfaces or localized bumps, the chuck and workpiece often cannot achieve a tight fit, resulting in a reduced effective adsorption area, a significant decrease in suction force, and even serious safety hazards such as unstable adsorption and workpiece falling from the air. Conventional lifting devices that use rigid lifting beams to install multiple chucks also cannot overcome this problem. Even more challenging are workpieces with three-dimensional curved shapes, such as ship hull plates, train shells, and machine tool covers, whose surfaces exhibit complex spatial curvature variations. In this case, conventional rigid lifting beam multi-cup lifting devices can hardly make all chucks simultaneously adhere to and adsorb onto the workpiece surface, or even if they barely make contact, the lifting load borne by each chuck is severely uneven, making it difficult to synchronously control the workpiece's posture during lifting, which can easily lead to localized detachment, causing the workpiece to tilt, slip, or even fall. Summary of the Invention

[0004] Therefore, it is necessary to provide a steel plate lifting tool that can not only adsorb conventional flat workpieces, but also uneven workpieces and workpieces with three-dimensional curved surfaces.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution: A steel plate lifting device, comprising: The ball mandrel is connected to the lifting equipment. A swing disk is fitted onto the outside of the ball core shaft and is rotatably connected around the center of the ball core shaft; The first adsorption disk is mounted on the ball core shaft; The second adsorption plate is mounted on the swing plate and has a swing angle with the swing plate so that the adsorption surface of the second adsorption plate abuts against the adsorbed object.

[0006] It is understandable that the swing disk is sleeved on the outside of the ball core shaft, and the swing disk rotates around the center of the ball core shaft, thereby driving the second adsorption disk below the swing disk to rise and fall, so that the first adsorption disk and the second adsorption disk can reach the surface of the adsorbed workpiece at different heights, thus enabling the adsorption of both conventional flat workpieces and uneven workpieces and workpieces with three-dimensional curved shapes.

[0007] In one embodiment, the swing disk has a swing groove, the swing groove includes a connecting part and a clearance part that are interconnected, the ball mandrel is installed in the connecting part, and the connecting end of the ball mandrel and the lifting equipment is installed in the clearance part.

[0008] In one embodiment, the oscillating disk includes a rotating part and a mounting part connected to each other, the ball core shaft is mounted in the rotating part, the second adsorption disk is mounted on the mounting part, and the thickness of the rotating part is not less than the thickness of the mounting part.

[0009] In one embodiment, the maximum diameter of the connecting portion is smaller than the maximum diameter of the ball mandrel.

[0010] In one embodiment, a first chain is provided between the first adsorption disk and the ball core shaft, one end of the first chain is connected to the first adsorption disk, and the other end of the first chain is connected to the ball core shaft. The first chain includes a plurality of connected first links.

[0011] In one embodiment, a second chain is provided between the second adsorption disk and the ball core shaft, one end of the second chain is connected to the second adsorption disk, and the other end of the second chain is connected to the ball core shaft, the second chain including a plurality of connected second chain links.

[0012] In one embodiment, the length of the second chain is not less than the length of the first chain.

[0013] In one embodiment, a plurality of second adsorption disks are arranged at center-to-center intervals along the ball core axis on the oscillating disk.

[0014] In one embodiment, when the second adsorption disk is not under force, the center of gravity of the second adsorption disk and the swing disk as a whole is located in the vertical direction of the center of gravity of the ball core shaft.

[0015] In one embodiment, the first suction cup and the second suction cup are electromagnetic suction cups.

[0016] Compared with the prior art, a steel plate lifting device is provided by setting a swing disk sleeved on the outside of the ball core shaft, and the swing disk rotates around the center of the ball core shaft, thereby driving the second adsorption disk below the swing disk to rise and fall, so that the first adsorption disk and the second adsorption disk can reach the surface of the adsorbed workpiece at different heights. Thus, it can adsorb not only conventional flat workpieces, but also uneven workpieces and workpieces with three-dimensional curved shapes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a steel plate lifting device provided in this application.

[0019] Figure 2 A cross-sectional view of a steel plate lifting device provided in this application.

[0020] Figure 3 A top view of a steel plate lifting device provided in this application.

[0021] Figure 4 This is a schematic diagram of the structure of a steel plate lifting device provided in this application for adsorbing a component in a first inclined direction.

[0022] Figure 5 This is a schematic diagram of the structure of a steel plate lifting device provided in this application for adsorbing a component in a second inclined direction.

[0023] Figure 6 This is a schematic diagram of a steel plate lifting device provided in this application for adsorbing an arc-shaped object.

[0024] The component labels are as follows: 1. Ball mandrel; 11. Lifting ring; 12. Steel wire rope; 2. Swing disc; 21. Swing groove; 211. Connecting part; 212. Clearance part; 22. Rotating part; 23. Mounting part; 3. First adsorption disc; 31. First chain; 311. First link; 4. Second adsorption disc; 41. Second chain; 411. Second link. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Electromagnetic chucks, with their significant advantages such as strong suction, convenient control, and minimal damage to workpiece surfaces, have been widely used in industrial applications such as batch lifting of steel workpieces and loading / unloading in automated production lines. Lifting devices made using electromagnetic chucks can achieve rapid adsorption and release of workpieces, significantly improving material handling efficiency. In practical applications, for larger and heavier workpieces, the limited suction force per unit area of ​​the electromagnetic chuck often necessitates the use of multiple chucks working in tandem. The conventional approach is to fix multiple chucks onto a rigid lifting beam, ensuring that each chuck simultaneously contacts and adsorbs the workpiece during lifting. The normal operation of this multi-chuck lifting device based on a rigid beam relies on a crucial prerequisite: the adsorption end faces of all chucks must be in the same plane, and the axes of each chuck must be strictly perpendicular to the workpiece surface.

[0031] However, electromagnetic chucks have high requirements for the surface flatness of the workpiece. For workpieces with uneven surfaces such as warped surfaces or localized bumps, the chuck and workpiece often cannot achieve a tight fit, resulting in a reduced effective adsorption area, a significant decrease in suction force, and even serious safety hazards such as unstable adsorption and workpiece falling from the air. Conventional lifting devices that use rigid lifting beams to install multiple chucks also cannot overcome this problem. Even more challenging are workpieces with three-dimensional curved shapes, such as ship hull plates, train shells, and machine tool covers, whose surfaces exhibit complex spatial curvature variations. In this case, conventional rigid lifting beam multi-cup lifting devices can hardly make all chucks simultaneously adhere to and adsorb onto the workpiece surface, or even if they barely make contact, the lifting load borne by each chuck is severely uneven, making it difficult to synchronously control the workpiece's posture during lifting, and making it very easy for localized detachment to occur, leading to workpiece tilting, slipping, or even falling.

[0032] Therefore, it is necessary to provide a steel plate lifting tool that can not only adsorb conventional flat workpieces, but also uneven workpieces and workpieces with three-dimensional curved surfaces.

[0033] Please see Figures 1 to 3 This application provides a steel plate lifting tool including a spherical mandrel 1, which is the core component for force bearing and self-aligning of the tool. Its outer surface is configured as a spherical or arc-shaped structure. In some embodiments, the spherical mandrel 1 can be a complete sphere, thereby providing a uniform contact surface in all directions; in other embodiments, considering manufacturing costs and ease of assembly, the spherical mandrel 1 can also be machined as at least a partially spherical structure, such as a hemisphere or a columnar body with a spherical crown, as long as its outer surface has spherical curvature.

[0034] The top end of the ball mandrel 1 is used to connect with external lifting equipment, such as a bridge crane, electric hoist, or robotic arm. For easy connection, a lifting ring 11 is fixedly installed at the top end of the ball mandrel 1. This lifting ring 11 can be fixed to the ball mandrel 1 by welding, integral casting, or threaded fastening. The side of the lifting ring 11 facing away from the ball mandrel 1, i.e., the upper end of the lifting ring 11, is connected to a flexible traction component such as a wire rope 12, chain, or sling, which is further connected to the external lifting equipment. In this way, the lifting force generated by the lifting equipment is transmitted to the ball mandrel 1 through the wire rope 12 and the lifting ring 11, thereby driving the entire lifting device and the adsorbed steel plate workpiece to move up and down.

[0035] A swing disk 2 is also provided on the outside of the ball mandrel 1. The swing disk 2, located on the outside of the ball mandrel 1, is a key component for realizing the adaptive swing function. A through or semi-through swing groove 21 is formed on the swing disk 2, and the internal contour of the swing groove 21 is adapted to the outer surface of the ball mandrel 1. The ball mandrel 1 is mounted inside the swing disk 2 through the swing groove 21, and a ball-joint relationship is formed between the ball mandrel 1 and the swing disk 2: the ball mandrel 1 can rotate or swing with multiple degrees of freedom relative to the swing disk 2, using its own center of rotation as the rotation center. In other words, the swing disk 2 can tilt about the ball mandrel 1 in any direction, thereby realizing the relative angular displacement between the swing disk 2 and the ball mandrel 1.

[0036] This ball-joint connection structure allows the swing disk 2 to adaptively adjust its posture according to the normal direction of the workpiece surface when the surface of the steel plate adsorbed below the lifting device exhibits warping, local bulging, or three-dimensional curved shapes. Simultaneously, because the ball core shaft 1 maintains a vertically upward traction force with the lifting equipment through the lifting ring 11, the ball core shaft 1 itself does not swing significantly with the swing disk 2, thus ensuring the stability of the lifting direction.

[0037] To further optimize the smoothness of movement between the swing disk 2 and the ball core shaft 1, and to avoid interference with other components during the swing process, the swing groove 21 is designed to have a connecting part 211 and a clearance part 212 that are interconnected.

[0038] The ball mandrel 1 is installed inside the connecting part 211. The inner wall of the connecting part 211, that is, the side opposite to the outer surface of the ball mandrel 1, is machined into an arc-shaped or spherical surface that matches the outer wall of the ball mandrel 1. This arc-shaped surface forms a sliding fit with the spherical surface of the ball mandrel 1, which not only ensures smooth relative rotation between the two, but also provides sufficient contact area to distribute the pressure during lifting, avoiding local stress concentration that could lead to wear or damage to the components.

[0039] A clearance portion 212 is provided on the side of the connecting portion 211 near the lifting ring 11, i.e., the upper region of the swing groove 21. Since the lifting ring 11 is fixed to the top of the ball mandrel 1, the relative position between the lifting ring 11 and the swing disk 2 changes when the swing disk 2 tilts relative to the ball mandrel 1. Without the clearance portion 212, the upper edge of the swing disk 2 may collide with the lifting ring 11, thereby limiting the swing angle or even causing structural damage. Therefore, the horizontal space of the clearance portion 212 (e.g., its lateral width or diameter) is designed to be greater than the maximum outer diameter of the lifting ring 11. In this way, no matter which direction the swing disk 2 swings, the lifting ring 11 can move freely within the space provided by the clearance portion 212 without contacting or interfering with the swing disk 2, thereby ensuring a large swing angle range and improving the adaptability of the lifting device to complex curved workpieces.

[0040] In some embodiments of this application, the maximum diameter of the connecting portion 211 within the swing groove 21 for accommodating the ball mandrel 1 is designed to be smaller than the maximum diameter of the ball mandrel 1. Specifically, since the outer surface of the ball mandrel 1 is spherical or arc-shaped, its maximum diameter corresponds to the equator position of the ball core or the edge of the spherical crown; while the maximum value of the opening size or inner diameter of the connecting portion 211 is smaller than the maximum diameter of the ball core. This dimensional fit ensures that once the ball mandrel 1 is assembled into the connecting portion 211, it cannot be directly dislodged from the opening direction of the connecting portion 211, thus forming a reliable mechanical limiting structure. This structure not only ensures that the swing disk 2 can swing freely around the ball mandrel 1, but also prevents the swing disk 2 and the ball mandrel 1 from accidentally separating during lifting, significantly improving the connection reliability and safety of the lifting device.

[0041] In some embodiments of this application, when the second adsorption plate 4 is in a stress-free state (e.g., without adsorbing a workpiece or in an unloaded state after the workpiece has been removed), the center of gravity of the overall assembly consisting of the second adsorption plate 4 and the swing plate 2 is configured to be located in the vertical direction of the center of gravity of the spherical core shaft 1. In other words, the center of gravity of the overall assembly coincides with the projection of the center of gravity of the spherical core shaft 1 onto the horizontal plane. With this center of gravity arrangement, under unloaded conditions, the swing plate 2 and the second adsorption plate 4 can automatically maintain a natural drooping posture under their own gravity without spontaneously tilting or deflecting to either side. This not only facilitates the alignment of the lifting device with the workpiece at the starting position but also ensures that the initial swing angle of the swing plate 2 is zero during lifting, thereby avoiding additional off-center load torque caused by the shift of the center of gravity, and thus improving the stability and safety of the adsorption operation.

[0042] In some embodiments, the swing disk 2 specifically includes a rotating part 22 and a mounting part 23 connected to each other. The rotating part 22 is located in the central region of the swing disk 2 and is used to form a spherical hinge with the ball mandrel 1; the mounting part 23 is located on the outer side of the rotating part 22 and is used to fix the lower adsorption assembly. Specifically, the ball mandrel 1 is installed inside the rotating part 22, and the outer wall of the ball mandrel 1 abuts against the inner wall of the rotating part 22, forming a relatively sliding contact surface between them. Since the outer surface of the ball mandrel 1 is spherical or arc-shaped, and the inner wall of the rotating part 22 is provided with a matching arc-shaped or spherical surface, the swing disk 2 can freely swing in multiple directions around the center of the ball mandrel 1 on the outer wall of the ball mandrel 1.

[0043] To ensure the structural strength and load-bearing capacity of the rotating part 22 and to avoid local deformation or excessive wear under long-term oscillating friction or heavy-load conditions, the thickness of the rotating part 22 is set to be no less than the thickness of the mounting part 23. In a preferred embodiment, the thickness of the rotating part 22 is greater than the thickness of the mounting part 23. This ensures the mechanical durability of the ball joint area while appropriately reducing the weight of the mounting part 23, thereby optimizing the center of gravity distribution of the entire oscillating disk 2.

[0044] In some embodiments, the steel plate lifting device further includes a first adsorption disk 3 located below the ball mandrel 1 and a second adsorption disk 4 located below the swing disk 2. Both the first adsorption disk 3 and the second adsorption disk 4 are used to generate electromagnetic adsorption force to adhere to and pick up workpieces such as steel plates. In a specific embodiment, the first adsorption disk 3 and the second adsorption disk 4 are electromagnetic adsorption disks. The first adsorption disk 3 is flexibly connected to the ball mandrel 1 via a first chain 31, while the second adsorption disk 4 is flexibly connected to the swing disk 2 via a second chain 41. This flexible chain connection not only allows each adsorption disk to adjust its posture independently in space but also effectively buffers impact loads during lifting, avoiding localized stress concentration caused by rigid connections.

[0045] Specifically, one end of the first chain 31 is connected to the first adsorption disk 3, and the other end of the first chain 31 is connected to the ball core shaft 1. Through the first chain 31, the ball core shaft 1 and the first adsorption disk 3 form a relatively fixed traction relationship, but the two are not rigidly constrained; rather, a certain degree of relative oscillation and rotation is allowed. In a more specific embodiment, the first chain 31 is composed of multiple first chain links 311 connected in sequence. The first chain link 311 located near the first adsorption disk 3 (i.e., the last chain link) is hinged to the upper surface of the first adsorption disk 3 or to a special lug; the first chain link 311 located near the ball core shaft 1 (i.e., the first chain link) is hinged to the bottom or lower lug of the ball core shaft 1. Through this hinged connection, each first chain link 311 can rotate freely relative to its adjacent chain link, thereby allowing the entire first chain 31 to remain flexible when under tension and to bend and fold freely when not under force. This design allows the first adsorption plate 3 to hang naturally under gravity when not in contact with the workpiece, and when adsorbing uneven surfaces, it can make a small range of adaptive deflection relative to the ball core shaft 1, thereby improving the fit.

[0046] The second adsorption plate 4 is positioned below the swing disk 2 and is connected to the swing disk 2 via a second chain 41. One end of the second chain 41 is connected to the second adsorption plate 4, and the other end is connected to the swing disk 2. Similar to the first chain 31, the second chain 41 is also composed of multiple sequentially connected second links 411. The second link 411 located near the second adsorption plate 4 (the last link) is hinged to the second adsorption plate 4, while the second link 411 located near the swing disk 2 (the first link) is hinged to the lower side of the swing disk 2 or to a dedicated connecting seat. Through this multi-link hinged structure, the second chain 41 also possesses good flexibility and directional adaptability.

[0047] Reference Figures 4-6 The oscillating disk 2 itself can oscillate with multiple degrees of freedom relative to the ball core shaft 1. Therefore, in addition to being flexibly connected through the second chain 41, the second adsorption disk 4 will also have a larger position adjustment range as the posture of the oscillating disk 2 changes. This dual compliance mechanism (oscillation of the oscillating disk 2 + chain flexibility) allows the second adsorption disk 4 to more flexibly conform to the local undulations of the three-dimensional curved surface workpiece.

[0048] The length of the second chain 41 is designed to be no less than the length of the first chain 31. Here, "length" refers to the straight-line distance between the hinge points at both ends of the chain when it is taut. In a preferred embodiment, the length of the second chain 41 is greater than the length of the first chain 31; in another embodiment, the two lengths are equal.

[0049] When the lifting device needs to adsorb workpieces with large curvature or tilt angles, the swing disk 2 will tilt relative to the ball mandrel 1 to adapt to the normal direction of the local workpiece surface. At this time, the second chain 41 connected below the swing disk 2 will shift horizontally as the swing disk 2 tilts. If the length of the second chain 41 is too short, when the swing disk 2 tilts, the second adsorption disk 4 may be excessively pulled by the second chain 41 and cannot be stably attached to the workpiece surface, or even become suspended or only in contact with the edge. By setting the length of the second chain 41 to be no less than that of the first chain 31, it can be ensured that when the swing disk 2 has its maximum design swing angle, the second chain 41 still has sufficient slack or a reasonable traction angle, so that the second adsorption disk 4, under its own weight and the vertical pressure transmitted by the chain, always maintains stable surface contact with the workpiece surface, and will not tend to detach due to the chain being taut or the tilt angle being too large.

[0050] Furthermore, the longer second chain 41 allows the second adsorption disk 4 to make small-amplitude attitude adjustments independently of the oscillating disk 2 during adsorption. Since each link of the chain can be hinged and rotated, the second adsorption disk 4 can locally tilt around its own hinge point, thereby better conforming to the microscopic unevenness of the workpiece surface. This "long chain + multiple hinges" solution significantly reduces the sensitivity of the lifting device to the surface shape accuracy of the workpiece, and is particularly suitable for the automated lifting of three-dimensional curved steel plates with continuously variable curvature, such as ship hull plates and locomotive shells.

[0051] Reference Figure 3 In some embodiments of this application, multiple second adsorption disks 4 are provided, and the multiple second adsorption disks 4 are distributed at intervals along the circumferential direction of the swing disk 2. Further, the multiple second adsorption disks 4 are configured to be evenly spaced on the swing disk 2 along the radial circumferential direction of the sphere core shaft 1, with the center of the sphere as the reference center. This distributed layout with the sphere core as the reference ensures that when the swing disk 2 swings around the sphere core shaft 1 in any direction, each second adsorption disk 4 can maintain a symmetrical or balanced force relationship relative to the sphere core shaft 1. When adsorbing three-dimensional curved workpieces, each second adsorption disk 4 can independently adjust the contact angle according to the local curvature of the workpiece, while the overall load is transmitted to the lifting point through the swing disk 2 and the sphere core shaft 1, avoiding adsorption disk detachment or workpiece slippage caused by off-center loading, and significantly improving the stability and reliability of multi-adsorption disk collaborative operation.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A steel plate lifting device, characterized in that, include: The ball mandrel (1) is connected to the lifting equipment; The swing disk (2) is sleeved on the outside of the ball core shaft (1) and rotates around the center of the ball core shaft (1); The first adsorption disk (3) is mounted on the ball core shaft (1); The second adsorption disk (4) is installed on the swing disk (2) and has a swing angle with the swing disk (2) so that the adsorption surface of the second adsorption disk (4) abuts against the adsorbed object.

2. The steel plate lifting device according to claim 1, characterized in that, The swing plate (2) has a swing groove (21), which includes a connecting part (211) and a clearance part (212) that are connected to each other. The ball mandrel (1) is installed on the connecting part (211), and the connection end of the ball mandrel (1) and the lifting equipment is installed on the clearance part (212).

3. The steel plate lifting device according to claim 2, characterized in that, The swing disk (2) includes a rotating part (22) and a mounting part (23) connected to each other. The ball core shaft (1) is installed in the rotating part (22), and the second adsorption disk (4) is installed on the mounting part (23). The thickness of the rotating part (22) is not less than the thickness of the mounting part (23).

4. The steel plate lifting device according to claim 2, characterized in that, The maximum diameter of the connecting part (211) is smaller than the maximum diameter of the ball mandrel (1).

5. The steel plate lifting device according to claim 1, characterized in that, A first chain (31) is provided between the first adsorption disk (3) and the ball core shaft (1). One end of the first chain (31) is connected to the first adsorption disk (3), and the other end of the first chain (31) is connected to the ball core shaft (1). The first chain (31) includes a plurality of connected first links (311).

6. The steel plate lifting device according to claim 5, characterized in that, A second chain (41) is provided between the second adsorption disk (4) and the swing disk (2). One end of the second chain (41) is connected to the second adsorption disk (4), and the other end of the second chain (41) is connected to the swing disk (2). The second chain (41) includes a plurality of connected second links (411).

7. The steel plate lifting device according to claim 6, characterized in that, The length of the second chain (41) is not less than the length of the first chain (31).

8. The steel plate lifting device according to claim 1, characterized in that, Multiple second adsorption disks (4) are arranged on the swing disk (2) at intervals along the center of the ball core axis (1).

9. The steel plate lifting device according to claim 1, characterized in that, When the second adsorption disk (4) is not under force, the center of gravity of the second adsorption disk (4) and the swing disk (2) as a whole is located in the vertical direction of the center of gravity of the ball core shaft (1).

10. The steel plate lifting device according to any one of claims 1-9, characterized in that, The first adsorption plate (3) and the second adsorption plate (4) are electromagnetic chucks.

Images