An electromagnet or electro-permanent magnet sling with a telescopic crossbeam

Abstract

The present invention belongs to the technical field of lifting appliances, and particularly relates to an electromagnet or electro-permanent magnet lifting appliance with a telescopic crossbeam. It includes a main beam, a fixed suspension device, a telescopic beam, a movable suspension device and a telescopic drive mechanism. The main beam is a hollow structure, and both ends of the main beam are slidably connected to two telescopic beams respectively. Two telescopic drive mechanisms are arranged inside the main beam, and the two telescopic drive mechanisms are respectively connected to the two telescopic beams. Upper guiding mechanisms and lower guiding mechanisms for guiding the telescopic beams are arranged at both ends of the main beam; A plurality of fixed suspension devices are arranged at intervals along the length direction below the main beam, and at least one set of movable suspension devices are arranged below both telescopic beams. The fixed suspension devices and the movable suspension devices are used for lifting steel plates. The structure of the present invention is simple, the volume is small, and the maintenance cost is low, and it can effectively prevent damage to the drive device caused by the flexural deformation of the system.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting tools, and particularly relates to an electromagnet or an electro-permanent magnet lifting tool with a telescopic cross beam. Background Art

[0002] At present, for the telescopic lifting cross beam used for lifting steel plates, its telescopic drive is in the form of a hydraulic cylinder drive. This device needs to be equipped with devices such as a hydraulic station, a hydraulic cylinder, and oil pipes. It is bulky, has high machining accuracy, and is expensive. During the lifting operation of the telescopic beam and the main beam of the telescopic lifting cross beam, the telescopic beam and the main beam have large deflection deformations, which cause certain damage to the internal drive components. Therefore, the structure is heavy and the drive system is complex. There is also a telescopic lifting cross beam using a motor, a reducer, and a wire rope drive, which has a complex structure and high maintenance costs. Therefore, how to achieve a telescopic lifting cross beam with a lightweight structure, transmission, and high economy is an urgent problem to be solved. Summary of the Invention

[0003] Aiming at the above problems, the purpose of the present invention is to provide an electromagnet or an electro-permanent magnet lifting tool with a telescopic cross beam, so as to solve the problems of the existing telescopic lifting cross beam, such as complex structure, large volume, high maintenance cost, large deflection deformation of the telescopic beam and the main beam, and certain damage to the internal drive components.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The present invention provides an electromagnet or an electro-permanent magnet lifting tool with a telescopic cross beam, including a main beam, a fixed suspension device, a telescopic beam, a movable suspension device, and a telescopic drive mechanism. The main beam is a hollow structure. The two ends of the main beam are respectively slidably connected to two telescopic beams. Two telescopic drive mechanisms are arranged inside the main beam. The two telescopic drive mechanisms are respectively connected to the two telescopic beams. Upper guiding mechanisms and lower guiding mechanisms for guiding the telescopic beams are arranged at both ends of the main beam; a plurality of fixed suspension devices are arranged at intervals along the length direction below the main beam. At least one set of movable suspension devices is arranged below each of the two telescopic beams. The fixed suspension devices and the movable suspension devices are used for lifting workpieces.

[0006] In a possible implementation manner, the upper guiding mechanism includes an inner upper guiding device and an outer upper guiding device arranged on the top of the main beam, wherein the outer upper guiding device is arranged at the end of the main beam;

[0007] Both the inner upper guiding device and the outer upper guiding device include a guiding support frame, a gear, a guiding baffle, a floating frame, an elastic connection assembly II, and an upper rack. The upper rack is arranged along the length direction on the top of the telescopic beam. The guiding support frame is arranged on the top of the main beam. The floating frame is connected to the guiding support frame through the elastic connection assembly II. The gear is rotatably installed on the floating frame and meshes with the upper rack. Guiding baffles are provided at both ends of the gear, and the upper rack is located between the two guiding baffles.

[0008] In a possible implementation manner, the elastic connection assembly II includes a lifting column and a spring assembly II. There are two lifting columns. The two lifting columns are slidably connected to the top of the guiding support frame. The lower ends of the two lifting columns are both connected to the floating frame. Spring assemblies II are sleeved on the upper ends of the two lifting columns. The lower ends of the spring assemblies II abut against the guiding support frame, and the upper ends of the spring assemblies II abut against the limit blocks provided on the lifting columns.

[0009] In a possible implementation manner, the inner upper guiding device further includes a braking rack arranged on the guiding support frame and parallel to the telescopic direction of the telescopic beam. The braking rack is located above the gear and there is a gap between the braking rack and the gear. When the telescopic beam deflects and deforms, the gear meshes with the braking rack, thereby realizing the braking function.

[0010] In a possible implementation manner, the lower guiding mechanism includes an inner lower guiding device and an outer lower guiding device arranged at the bottom of the main beam. The outer lower guiding device is arranged at the end of the main beam.

[0011] The inner lower guiding device and the outer lower guiding device have the same structure and both include a guiding wheel support seat and a guiding wheel. The guiding wheel support seat is arranged at the bottom of the main beam. The guiding wheel is rotatably installed on the guiding wheel support seat and contacts the bottom of the telescopic beam.

[0012] In a possible implementation manner, the fixed suspension device and the movable suspension device have the same structure and both include a chain, a box frame, a wire distributing box, an electromagnetic module, and an elastic connection assembly I. The box frame is a cuboid structure with an open bottom. Multiple groups of electromagnetic modules are arranged at intervals along the length direction inside the box frame. Each electromagnetic module is respectively connected to the top of the box frame through a group of elastic connection assemblies I. Multiple wire distributing boxes and suspension lugs at both ends are provided on the outer top of the box frame. The wire distributing box is used for electrical wire distribution of multiple groups of electromagnetic modules. The suspension lugs are connected to the main beam or the telescopic beam through a chain.

[0013] In a possible implementation manner, the electromagnetic module is an electromagnet or an electro-permanent magnet.

[0014] In one possible implementation, the elastic connection component I includes a limit sleeve, a suspension rod, and a spring component I. There are two suspension rods. Axle shoulders are provided at the upper ends of the two suspension rods, and the lower ends are inserted into the box frame and connected to the electromagnetic module. A limit sleeve and a spring component I are sleeved on each suspension rod. The limit sleeve is located inside the box frame, and the spring component I is located outside the box frame and abuts against the axle shoulder of the suspension rod and the box frame at both ends respectively.

[0015] In one possible implementation, the telescopic driving mechanism includes an electric push rod. The tail of the electric push rod is hinged to the main beam, and the output end of the electric push rod is hinged to the end of the telescopic beam.

[0016] In one possible implementation, a main lifting lug is provided at the top of the main beam.

[0017] The advantages and beneficial effects of the present invention are as follows: An electromagnet or electro-permanent magnet lifting appliance with a telescopic crossbeam provided by the present invention has a simple structure, a small volume, and a low maintenance cost, and can effectively prevent damage to the driving device caused by the flexural deformation of the system.

[0018] An electromagnet or electro-permanent magnet lifting appliance with a telescopic crossbeam provided by the present invention can adapt to steel pipes with different outer diameters, quickly align the lifting appliance with the steel plate through the mechanism, and is convenient to operate, saving time and effort.

[0019] Other features and advantages of the present invention will be described in the following description. Moreover, some of them will be obvious from the description, or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and the accompanying drawings.

[0020] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments. Description of the Drawings

[0021] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings:

[0022] Figure 1 is an axonometric view of an electromagnet or electro-permanent magnet lifting appliance with a telescopic crossbeam according to the present invention;

[0023] Figure 2 is Figure 1 a partial enlarged view at A in

[0024] Figure 3 is a partial cross-sectional view of an electromagnet or electro-permanent magnet lifting appliance with a telescopic crossbeam according to the present invention;

[0025] Figure 4 is Figure 3Partial enlarged view at location B in the [Chinese context];

[0026] Figure 5 Side view of a kind of electromagnet or electro-permanent magnet sling with a telescopic crossbeam in the present invention;

[0027] Figure 6 Cross-sectional view of the outer suspension device in the present invention;

[0028] In the figure: 1 is the main lifting lug, 2 is the main beam, 201 is the main beam box body, 203 is the guiding and supporting frame, 202 is the avoidance hole, 204 is the braking rack, 3 is the fixed suspension device, 4 is the telescopic beam, 401 is the telescopic beam main body, 402 is the upper rack, 5 is the movable suspension device, 501 is the chain, 502 is the suspension lifting lug, 503 is the box frame, 504 is the junction box, 505 is the electromagnetic module, 506 is the limit sleeve, 507 is the suspension rod, 508 is the spring assembly I, 6 is the outer lower guiding device, 7 is the inner lower guiding device, 701 is the guiding wheel support seat, 702 is the guiding wheel, 8 is the outer upper guiding device, 9 is the inner upper guiding device, 901 is the shaft, 902 is the bearing, 903 is the gear, 904 is the guiding baffle, 905 is the side plate, 906 is the back plate, 907 is the back plate hole, 908 is the upper plate, 909 is the lifting column, 910 is the spring assembly II, 10 is the electric push rod. Detailed implementation manners

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0031] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0033] An embodiment of the present invention provides an electromagnet or an electro-permanent magnet sling with a telescopic crossbeam, which has a simple structure, a small volume, and a low maintenance cost, and can effectively prevent damage to the driving device caused by the flexural deformation of the system. Refer to Figures 1 to 3 As shown in the figure, the electromagnet or the electro-permanent magnet sling with a telescopic crossbeam includes a main beam 2, a fixed suspension device 3, a telescopic beam 4, a movable suspension device 5, and a telescopic driving mechanism. The main beam 2 is a hollow structure. The two ends of the main beam 2 are respectively slidably connected to the two telescopic beams 4. Two telescopic driving mechanisms are arranged inside the main beam 2, and the two telescopic driving mechanisms are respectively connected to the two telescopic beams 4. Upper guiding mechanisms and lower guiding mechanisms for guiding the telescopic beams 4 are arranged at both ends of the main beam 2; a main lifting lug 1 is arranged at the top of the main beam 2, and a plurality of fixed suspension devices 3 are arranged at intervals along the length direction below the main beam 2. At least one set of movable suspension devices 5 is arranged below each of the two telescopic beams 4. The fixed suspension devices 3 and the movable suspension devices 5 are used for lifting steel plates.

[0034] Refer to Figure 2 、 Figure 3 As shown in the figure, in the embodiment of the present invention, the lower guiding mechanism includes an inner lower guiding device 7 and an outer lower guiding device 6 arranged at the bottom of the main beam 2, and the outer lower guiding device 6 is arranged at the end of the main beam 2. The upper guiding mechanism includes an inner upper guiding device 9 and an outer upper guiding device 8 arranged at the top of the main beam 2, and the outer upper guiding device 8 is arranged at the end of the main beam 2.

[0035] Refer to Figure 5 As shown in the figure, in the embodiment of the present invention, the inner lower guiding device 7 and the outer lower guiding device 6 have the same structure, and both include a guide wheel support seat 701 and a guide wheel 702. The guide wheel support seat 701 is arranged at the bottom of the main beam 2, and the guide wheel 702 is rotatably installed on the guide wheel support seat 701 and contacts the bottom of the telescopic beam 4. That is, the telescopic beam 4 is supported by the guide wheel 702. When the telescopic beam 4 expands and contracts, it drives the guide wheel 702 to rotate, thereby reducing the friction force.

[0036] Refer toFigure 4 As shown in the figure, in the embodiment of the present invention, both the inner upper guiding device 9 and the outer upper guiding device 8 include a guiding support frame 203, a gear 903, a guiding baffle 904, a floating frame, an elastic connection assembly II, and an upper rack 402. The upper rack 402 is arranged along the length direction on the top of the telescopic beam 4; the guiding support frame 203 is arranged on the top of the main beam 2, the floating frame is connected to the guiding support frame 203 through the elastic connection assembly II, the gear 903 is rotatably installed on the floating frame and meshes with the upper rack 402; guiding baffles 904 are provided at both ends of the gear 903, and the upper rack 402 is located between the two guiding baffles 904.

[0037] In the embodiment of the present invention, the elastic connection assembly II includes a lifting column 909 and a spring assembly II 910. There are two lifting columns 909. The two lifting columns 909 are slidably connected to the top of the guiding support frame 203. The lower ends of the two lifting columns 909 are both connected to the floating frame. Spring assemblies II 910 are sleeved on the upper ends of the two lifting columns 909. The lower ends of the spring assemblies II 910 abut against the guiding support frame 203, and the upper ends of the spring assemblies II 910 abut against the limiting blocks provided on the lifting columns 909.

[0038] Further, the inner upper guiding device 9 further includes a braking rack 204 arranged on the guiding support frame 203 and parallel to the telescopic direction of the telescopic beam 4. The braking rack 204 is located above the gear 903 and there is a gap between the braking rack 204 and the gear 903; when the telescopic beam 4 deflects and deforms, the gear 903 is engaged with the braking rack 204, thereby realizing the braking function.

[0039] Specifically, referring to Figure 5As shown in the figure, the floating frame includes side plates 905, a back plate 906, a back plate hole 907, and an upper plate 908. Two side plates 905 are welded to both sides of the upper plate 908, and a back plate 906 is welded to one side of the upper plate 908. The upper plate 908, the side plates 905, and the back plate 906 are arranged orthogonally to each other. A shaft 901 is installed on the two side plates 905 through holes, and its axis is perpendicular to the side surface of the box girder 201. A guiding baffle 904, a bearing 902, a gear 903, and another guiding baffle 904 are sequentially installed on the shaft 901 between the two side plates 905. Two lifting columns 909 are connected to the upper plate 908. The upper guiding device forms a lifting linear motion pair with the guiding support frame 203 through the two lifting columns 909, and is used for the gear 903 to mesh with the upper rack 402 of the telescopic beam 4. The spring assembly II 910 is limited between the lifting column 909 and the guiding support frame 203. The spring assembly II 910 keeps the gear 903 meshed with the upper rack 402 through elastic force, and the guiding baffle 904 is used to ensure the horizontal relative position between the telescopic beam 4 and the main beam 2. The braking rack 204 is fixed on the guiding support frame 203, the tooth surface of the braking rack 204 faces the tooth surface of the gear 903, and the distance is very close. The outer end lower side of the telescopic beam 4 is suspended with an outer suspension device 5.

[0040] See Figure 3 As shown in the figure, in the embodiment of the present invention, the telescopic driving mechanism includes an electric push rod 10. The tail of the electric push rod 10 is hinged to the main beam 2, the output end of the electric push rod 10 is hinged to the end of the telescopic beam 4, and the electric push rod 10 adopts servo control.

[0041] In the embodiment of the present invention, the main beam 2 includes a main beam box body 201. The electric push rod 10 is accommodated in the main beam box body 201, and the hinge axes at the front and rear ends are both perpendicular to the side surface of the main beam box body 201. A plurality of avoidance holes 202 are provided at the top and bottom of the main beam box body 201. The avoidance holes 202 are used to avoid the gear 903 and the guide wheel 702. The rotation axis of the guide wheel 702 is perpendicular to the side surface of the main beam box body 201.

[0042] See Figure 6 As shown in the figure, in the embodiment of the present invention, the fixed suspension device 3 and the movable suspension device 5 have the same structure, and both include a chain 501, a box frame 503, a wire distributing box 504, an electromagnetic module 505, and an elastic connection assembly I. The box frame 503 is a cuboid structure, and the bottom is open. A plurality of groups of electromagnetic modules 505 are arranged at intervals along the length direction inside the box frame 503. Each electromagnetic module 505 is respectively connected to the top of the box frame 503 through a group of elastic connection assemblies I. A plurality of wire distributing boxes 504 and suspension lugs 502 located at both ends are provided on the outer top of the box frame 503. The wire distributing box 504 is used for electrical wire distribution of the plurality of groups of electromagnetic modules 505. The suspension lugs 502 are connected to the main beam 2 or the telescopic beam 4 through the chain 501. In this embodiment, the electromagnetic module 505 is an electromagnet or an electro-permanent magnet.

[0043] In an embodiment of the present invention, the elastic connection assembly I includes a limit sleeve 506, a suspension rod 507, and a spring assembly I 508. There are two suspension rods 507. Axle shoulders are provided at the upper ends of the two suspension rods 507, and the lower ends are inserted into the box frame 503 and connected to the electromagnetic module 505. A limit sleeve 506 and a spring assembly I 508 are sleeved on each suspension rod 507. The limit sleeve 506 is located inside the box frame 503, and the spring assembly I 508 is located outside the box frame 503, and the two ends are respectively abutted against the axle shoulder of the suspension rod 507 and the box frame 503.

[0044] Specifically, the box frame 503 is preferably a long rectangular shape, including a top and four side steel plates for protecting the internal components. The electromagnetic module 505 is hoisted on the top of the box frame 503 through the elastic connection assembly I. The bottom of the box frame 503 is an open structure so that the electromagnetic module 505 can adsorb and hoist steel plate workpieces. Each electromagnetic module 505 forms a lifting linear motion pair with the box frame 503 through two suspension rods 507 to compensate for the unevenness of the adsorbed workpiece. The limit sleeve 506 is sleeved on the suspension rod 507, and its upper and lower surfaces are respectively in contact with the electromagnetic module 505 and the box frame 503 under the slight pressure of the spring assembly I 508. The electromagnetic module 505 adopts a spring suspension method, which can achieve self-adaptive balance and is convenient for the self-adaptation of the workpiece.

[0045] For an electromagnet or electro-permanent magnet sling with a telescopic crossbeam provided by the present invention, an outer suspension device 5 is suspended on the lower side of the outer end of the telescopic beam 4. The telescopic beam 4 servo-telescopes relative to the main beam 2 to adapt to the hoisting of workpieces within a certain length range, such as flexible workpieces like steel bar bundles and steel plates. Since both the main beam 2 and the telescopic beam 4 adopt a hollow box structure, lightweight is achieved. Considering the flexural deformation of the telescopic lifting crossbeam, the damage to the driving components (such as electric push rods) caused by the flexural deformation, and the flexibility of the transmission, as well as the telescopic safety self-locking problem in the case of accidental power failure. During the hoisting process of the sling, the telescopic beam 4 and the outer suspension device 5 servo-telescope in place relative to the main beam 2, the telescopic beam 4 and the main beam 2 undergo flexural deformation, the roller 702 of the telescopic beam 4 and the inner lower guiding device 7 are disengaged, and the flexural deformation of the telescopic beam 4 causes the gear 903 and the braking rack 204 to change from separation to meshing, so that the telescopic beam 4 cannot be telescoped, avoiding the damage to the electric push rod 10 caused by the flexural deformation. Specifically, the gear 903 and the braking rack 204 can also be replaced by a friction wheel and a brake shoe.

[0046] An electromagnet or electro-permanent magnet sling with a telescopic crossbeam provided by the present invention drives the telescopic beam to telescope through servo, adapts to steel plates of different lengths, is convenient to operate, time-saving and labor-saving; the structure of the present invention is simple, practical and light, facilitating lightweight implementation and having high economy; the present invention guides the telescopic beam through an upper and lower guiding mechanism, and when the telescopic beam deflects and deforms, the telescopic beam is restricted from telescoping through a braking structure to ensure the safety of the servo drive mechanism, can effectively prevent damage to the drive device caused by system flexural deformation, and improve the service life of the servo drive device.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications therein.

Claims

1. An electromagnet or electro-permanent magnet sling with a telescopic crossbeam, characterized in that, It includes a main beam (2), a fixed suspension device (3), a telescopic beam (4), a movable suspension device (5) and a telescopic drive mechanism. The main beam (2) is a hollow structure. The two ends of the main beam (2) are respectively slidably connected to two telescopic beams (4). Two telescopic drive mechanisms are arranged inside the main beam (2), and the two telescopic drive mechanisms are respectively connected to the two telescopic beams (4). Upper guiding mechanisms and lower guiding mechanisms for guiding the telescopic beam (4) are arranged at both ends of the main beam (2); A plurality of fixed suspension devices (3) are arranged at intervals along the length direction below the main beam (2), and at least one set of movable suspension devices (5) are arranged below both of the two telescopic beams (4). The fixed suspension device (3) and the movable suspension device (5) are used for lifting workpieces; The upper guiding mechanism includes an inner upper guiding device (9) and an outer upper guiding device (8) arranged on the top of the main beam (2), wherein the outer upper guiding device (8) is arranged at the end of the main beam (2); Both the inner upper guiding device (9) and the outer upper guiding device (8) include a guiding support frame (203), a gear (903), a guiding baffle (904), a floating frame, an elastic connection assembly II and an upper rack (402). The upper rack (402) is arranged along the length direction on the top of the telescopic beam (4); The guiding support frame (203) is arranged on the top of the main beam (2). The floating frame is connected to the guiding support frame (203) through the elastic connection assembly II. The gear (903) is rotatably installed on the floating frame and meshes with the upper rack (402); Guiding baffles (904) are arranged at both ends of the gear (903), and the upper rack (402) is located between the two guiding baffles (904); The inner upper guiding device (9) further includes a braking rack (204) arranged on the guiding support frame (203) and parallel to the telescopic direction of the telescopic beam (4). The braking rack (204) is located above the gear (903) and has a gap with the gear (903); When the telescopic beam (4) deflects and deforms, the gear (903) is engaged with the braking rack (204), so as to realize the braking function.

2. The electro-magnet or electro-permanent magnetic lifting appliance with a telescopic cross beam according to claim 1, characterized in that, The elastic connection assembly II includes a lifting column (909) and a spring assembly II (910). There are two lifting columns (909). The two lifting columns (909) are slidably connected to the top of the guiding support frame (203). The lower ends of the two lifting columns (909) are both connected to the floating frame. Spring assemblies II (910) are sleeved on the upper ends of the two lifting columns (909). The lower ends of the spring assemblies II (910) abut against the guiding support frame (203), and the upper ends of the spring assemblies II (910) abut against the limit blocks arranged on the lifting columns (909).

3. The electro - magnet or electro - permanent magnetic sling with a telescopic cross - beam according to claim 1, characterized in that, The lower guiding mechanism includes an inner lower guiding device (7) and an outer lower guiding device (6) arranged on the bottom of the main beam (2), wherein the outer lower guiding device (6) is arranged at the end of the main beam (2); The inner lower guiding device (7) and the outer lower guiding device (6) have the same structure, both including a guiding wheel support base (701) and a guiding wheel (702). The guiding wheel support base (701) is arranged at the bottom of the main beam (2), and the guiding wheel (702) is rotatably installed on the guiding wheel support base (701) and contacts the bottom of the telescopic beam (4).

4. The electromagnet or electro-permanent magnet sling with a telescopic crossbeam according to claim 1, characterized in that, The fixed suspension device (3) and the movable suspension device (5) have the same structure, both including a chain (501), a box frame (503), a distribution box (504), an electromagnetic module (505) and an elastic connection assembly I. The box frame (503) is a cuboid structure with an open bottom. A plurality of groups of electromagnetic modules (505) are arranged at intervals along the length direction inside the box frame (503). Each electromagnetic module (505) is respectively connected to the top of the box frame (503) through a group of elastic connection assemblies I. A plurality of distribution boxes (504) and suspension lugs (502) located at both ends are arranged on the outer top of the box frame (503). The distribution box (504) is used for electrical wiring of the plurality of groups of electromagnetic modules (505), and the suspension lugs (502) are connected to the main beam (2) or the telescopic beam (4) through the chain (501).

5. The electromagnet or electro-permanent magnetic lifting appliance with a telescopic crossbeam according to claim 4, characterized in that, The electromagnetic module (505) is an electromagnet or an electro-permanent magnet.

6. The electromagnet or electro-permanent magnet sling with a telescopic crossbeam according to claim 4, characterized in that The elastic connection assembly I includes a limit sleeve (506), a suspension rod (507) and a spring assembly I (508). There are two suspension rods (507). Axle shoulders are provided at the upper ends of the two suspension rods (507), and the lower ends are inserted into the box frame (503) and connected to the electromagnetic module (505). A limit sleeve (506) and a spring assembly I (508) are sleeved on each suspension rod (507). The limit sleeve (506) is located inside the box frame (503), and the spring assembly I (508) is located outside the box frame (503), and both ends are respectively abutted against the axle shoulder of the suspension rod (507) and the box frame (503).

7. The electromagnet or electro-permanent magnetic lifting appliance with a telescopic crossbeam according to claim 1, characterized in that, The telescopic driving mechanism includes an electric push rod (10). The tail of the electric push rod (10) is hinged to the main beam (2), and the output end of the electric push rod (10) is hinged to the end of the telescopic beam (4).

8. The electromagnet or electro-permanent magnet sling with a telescopic crossbeam according to claim 1, characterized in that A main lifting lug (1) is provided on the top of the main beam (2).

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