CN220245250U

CN220245250U - Telescopic lifting electromagnet lifting appliance

Info

Publication number: CN220245250U
Application number: CN202321602353.XU
Authority: CN
Inventors: 陈敬省; 陈敬锋; 王凯
Original assignee: Shandong Luci Industry Technology Co ltd
Current assignee: Shandong Luci Industry Technology Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-26
Anticipated expiration: 2033-06-21

Abstract

The utility model relates to the technical field of electromagnetic or electric permanent magnet lifting appliances for lifting, and mainly discloses a telescopic lifting electromagnet lifting appliance, wherein a four-point lifting mechanism is connected with the upper part of a fixed beam assembly, two ends of the fixed beam assembly are respectively and slidably connected with a telescopic beam assembly, fixed electromagnetic assemblies are arranged on the fixed beam assemblies, telescopic electromagnetic assemblies are arranged on the two telescopic beam assemblies, a gear motor and a gear are arranged on the fixed beam assemblies, racks are arranged on the tops of the two telescopic beam assemblies, the gears drive the racks to move so as to drive the telescopic beam assemblies to slide in a telescopic manner along the fixed beam assemblies, guide rollers are arranged on the telescopic beam assemblies, the telescopic beam assemblies are in contact with the upper surface and the lower surface of the fixed beam assemblies through the guide rollers, and the telescopic beam assemblies further comprise a landing detection assembly.

Description

Telescopic lifting electromagnet lifting appliance

Technical Field

The utility model relates to the technical field of electromagnetic lifting appliances for lifting, in particular to a telescopic lifting electromagnet lifting appliance.

Background

The electromagnetic lifting appliance is magnetic equipment for lifting by utilizing an electro-permanent magnetic technology, has the advantages of safety, energy conservation, high efficiency, convenience and the like, and is widely applied to industries such as iron and steel, metallurgy, shipbuilding and the like. The electric permanent magnet lifting appliance is generally composed of a cross beam and an electric permanent magnet sucker, the upper end of the cross beam is connected with the crane, the lower end of the cross beam is connected with the electric permanent magnet sucker, and the adsorption and release of materials are realized by controlling the magnetization and demagnetization of the electric permanent magnet sucker.

In the field of steel plate lifting, because steel plates produced by a steel mill are different in length, more in specification and model, when in traditional lifting, an electromagnetic chuck lifting beam is generally used for lifting the steel plates, but for steel plates of different sizes, the lifting beam with corresponding length needs to be replaced to be suitable for the length of the steel plates, but the time for each replacement needs to be one or more hours, and the replacement can be completed only by cooperation of more people, so that the working efficiency is very low, time and manpower are wasted, and the operation is inconvenient for lifting long-size steel plates; in the prior art, a telescopic lifting beam for lifting a steel plate is adopted, 1. The telescopic driving is realized in a hydraulic cylinder driving mode, and the device is required to be provided with a hydraulic station, a hydraulic cylinder, an oil pipe and other devices, so that the device has the advantages of large volume, high processing precision and high cost; 2. a telescopic lifting beam driven by a motor, a speed reducer and a steel wire rope, such as the telescopic beam for lifting disclosed in Chinese patent No. 107055319B, has a complex structure and high maintenance cost; 3. the gear rack driving mode is a telescopic mechanism of a gear rack type container spreader, as disclosed in Chinese patent No. 204490360U, and the device has the advantages of simple structure, high failure rate, high processing precision requirement, easy stress bending of long-stroke gear racks, easy damage caused by overload, and larger deflection deformation of telescopic beams and main beams of a telescopic lifting beam in lifting working condition operation, and certain damage to internal driving components.

In summary, the rack and pinion driving method has the advantage of simple structure, but: 1. in the hoisting work, the telescopic beam and the main beam are easy to flex and deform, so that the gear rack is easy to damage; 2. the existing permanent magnetic lifting appliance, the electromagnet magnetic lifting appliance and the electric permanent magnetic lifting appliance are controlled in a manual button or remote control mode, a worker is required to control the lifting appliance at one side, the risk of human error is high, if the demagnetizing button is mistakenly pressed in the lifting process, a falling accident can occur, and the lifting appliance has great potential safety hazard; 3. the current electromagnetic assembly is fixed with the fixed beam or the telescopic beam through only two or four chains, and as the steel plate can generate certain flexible deformation and can shake along with the lifting appliance when being lifted, the distance between the electromagnetic chuck and the steel plate is fixed, so that the contact surface of the electromagnetic chuck and the steel plate can be caused to be partially not contacted in the shaking or deforming process, thereby causing partial area failure of the electromagnetic chuck and further causing the risk of falling of the steel plate.

Disclosure of Invention

The utility model aims to provide a telescopic lifting electromagnet lifting appliance, which solves the problems that in the background technology, the gear and the rack are damaged due to deflection deformation caused by lifting weight and system dead weight, the existing electromagnet lifting appliance does not have a floor detection function, and the existing electromagnetic assembly is in a falling risk due to shaking during lifting, so that the potential safety hazard is large.

The technical scheme includes that the telescopic lifting electromagnet lifting appliance comprises a four-point lifting structure, fixed beam assemblies, telescopic beam assemblies and a power device, wherein the four-point lifting structure is connected with the upper part of each fixed beam assembly, the four-point lifting structure is used for lifting the electromagnet lifting appliance by the lifting machinery, two ends of each fixed beam assembly are respectively and slidably connected with one telescopic beam assembly, at least one fixed electromagnetic assembly is arranged on each fixed beam assembly, at least one telescopic electromagnetic assembly is arranged on each telescopic beam assembly, the power device is arranged on each fixed beam assembly, each power device comprises a speed reducing motor and a gear, racks are arranged at the upper tops of the two telescopic beam assemblies and meshed with each other through the speed reducing motor, and the racks are driven to move by the gears so as to drive the telescopic beam assemblies to stretch and slide along the fixed beam assemblies; the telescopic beam assembly is characterized in that at least one group of guide rollers are arranged on the upper surface and the lower surface of the telescopic beam assembly, the telescopic beam assembly is contacted with the upper surface and the lower surface of the fixed beam assembly through the guide rollers, so that friction force is reduced, the telescopic beam assemblies are smooth in expansion, at least one group of adjusting roller assemblies are further arranged on the outer bottom of the fixed beam assembly corresponding to each telescopic beam assembly, rollers of the adjusting roller assemblies are contacted with the bottom of the telescopic beam assembly, the telescopic beam assemblies are supported, the distance between the bottom of the telescopic beam and the inner bottom of the fixed beam assembly is adjusted, and friction between the telescopic beam assemblies and the fixed beam assembly is avoided; the floor detection assembly is further arranged at the joint of the four-point lifting structure and the fixed beam assembly, whether the electromagnet lifting appliance is in a lifting state or not can be detected through the floor detection assembly, when the electromagnet lifting appliance is in the lifting state, demagnetization operation cannot be performed, and only when the electromagnet lifting appliance is in the floor state, demagnetization operation can be performed, so that potential safety hazards can be eliminated; the telescopic electromagnetic assembly and the fixed electromagnetic assembly comprise a beam, a chain, an electromagnetic chuck, a spring connecting rod and a spring, wherein the beam spans and is arranged at the top of the fixed beam assembly or the telescopic beam assembly, the spring connecting rod sliding up and down along the beam is arranged at the two ends of the beam, the top of the spring connecting rod is fixedly connected with the top of the spring, the bottom of the spring contacts the top of the beam, the bottom of the spring connecting rod is connected with one end of the chain, the other end of the chain is connected with the top of the electromagnetic chuck, and when the telescopic electromagnetic assembly and the fixed electromagnetic assembly are in a hoisting state, the electromagnetic chuck and the steel plate are kept in contact at any time through the vertical sliding of the spring connecting rod on the beam due to the shaking or deformation of the steel plate, and the spring plays a buffering role, so that the possibility that the steel plate falls due to electromagnetic failure caused by the fact that part of the electromagnetic chuck and the steel plate are not contacted is avoided.

The utility model further adopts the technical scheme that: the fixed beam assembly is internally provided with a first slide way and a second slide way in parallel, the two telescopic beam assemblies are arranged in the first slide way and the second slide way and move in opposite directions in a telescopic way; through above-mentioned technical scheme, set up the purpose of a flexible roof beam subassembly respectively in two slides in order to shorten fixed roof beam subassembly length and enlarge the stroke of flexible roof beam, can adapt to the hoist and mount of the steel sheet of steel sheet specification length, and area is less under flexible state.

The utility model further adopts the technical scheme that: the gear motor set up in the middle part of fixed beam subassembly, and the gear setting is between the medial surface of two flexible beam subassemblies, two the rack and the gear engagement that flexible beam subassembly top set up, through above-mentioned technical scheme, adopt the rotation of a gear motor control gear in the middle part of fixed beam subassembly, drive two racks by a gear and remove in opposite directions, the purpose of design is under the prerequisite of guaranteeing the stroke of certain flexible beam subassembly like this, reduce gear motor's use to control manufacturing cost.

The utility model further adopts the technical scheme that: the gear motor be provided with two, two gear motor along the middle part symmetry setting of fixed beam subassembly at the top end of first slide and second slide, through this technical scheme, can increase the stroke of flexible beam subassembly at the fixed prerequisite of fixed beam subassembly length maximize limit.

The utility model further adopts the technical scheme that: be provided with a set of guide roll on a flexible roof beam subassembly, a set of guide roll is including setting up two guide roll on the top surface and the bottom surface of the tip of flexible roof beam subassembly, the bottom at the both ends of fixed roof beam subassembly respectively be provided with a set of regulation roller subassembly, and adjust the bottom that roller subassembly set up respectively in first slide and second slide, through above-mentioned technical scheme, set up a set of guide roll at the meshing end of rack and the gear of every flexible roof beam subassembly, respectively set up a set of regulation roller subassembly at the fixed roof beam subassembly lower extreme of the extension end bottom of every flexible roof beam subassembly, thereby according to the atress analysis, can reduce because flexible roof beam subassembly handling steel sheet and dead weight cause one end unbalance weight to make the rack warp, and then reduce the damage to rack and pinion, improve the life of hoist.

The utility model further adopts the technical scheme that: the utility model provides a cylinder subassembly of adjusting include two cylinder support frames, two the cylinder support frame on all be provided with rectangular hole, adjust the cylinder setting on two rectangular holes, through above-mentioned technical scheme, when because the telescopic girder subassembly that long-time use caused stretches out the end skew downwards, the height of cylinder is adjusted to the accessible rectangular hole, makes the telescopic girder subassembly be in the horizontality to make telescopic girder subassembly atress balanced, reduce rack and pinion's friction the damage that causes.

The utility model further adopts the technical scheme that: the balance bars are further arranged on the end faces of the two sides of the telescopic beam assembly, and unbalanced force born by the telescopic beam assembly can be buffered through the contact of the guide rail and the inner surface of the first slideway or the second slideway of the fixed beam assembly, so that friction to the telescopic beam assembly is reduced.

The utility model further adopts the technical scheme that: the floor detection assembly comprises a proximity switch and a rotation detection device, wherein the four-point lifting structure is connected with a fixed lug seat of the fixed beam assembly through a rotation shaft, the rotation detection device coaxially rotates with the rotation shaft, the proximity switch is arranged on the fixed lug seat, a notch and a detection surface are arranged on the rotation detection device, the detection distance of the detection switch is set, when a lifting appliance lifts and falls to the floor, the rotation shaft can rotate to drive the rotation detection device to synchronously rotate, when the lifting appliance is in a lifting state, the notch of the rotation detection device rotates to the position where the detection head of the detection switch is opposite, the proximity switch controls the demagnetizing switch to be in a closing state, so that demagnetizing operation cannot be performed in the lifting process, when the lifting appliance falls to the floor, the detection surface of the rotation detection device rotates to the position where the detection head of the proximity switch is opposite, and therefore the demagnetizing operation can be performed only in the landing state, and the most direct effect of the floor detection function is that the lifted steel can not fall due to wrong demagnetizing (improper operation) of the magnetic lifting appliance; the demagnetizing operation can be performed only after the steel material has been safely landed.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the bottom of the fixed beam assembly is provided with the plurality of fixed electromagnetic assemblies, the telescopic beam assembly is provided with the plurality of telescopic electromagnetic assemblies, the length of the whole lifting appliance can be adjusted to adapt to the lifting of steel plates with different lengths through the telescopic beam assembly in the fixed beam assembly, the driving mechanism with a telescopic function adopts a gear-rack structure with a simple structure, the production cost of the whole lifting appliance can be reduced, and the telescopic beam assembly is provided with the guide roller and the adjusting roller assembly for preventing the flexible deformation of the telescopic beam assembly, so that the damage caused by friction to rack gears is reduced, and the service life of the lifting appliance is prolonged.

2. According to the utility model, the landing detection assembly is arranged at the joint of the four-point lifting structure and the fixed beam assembly, the detection head of the proximity switch detects the rotation of the rotation detection device, so that whether the lifting appliance is in a lifting state or not is determined, when the lifting appliance lifts and lands, the rotation shaft rotates to drive the rotation detection device to synchronously rotate, when the lifting appliance is in the lifting state, the notch of the rotation detection device rotates to the position opposite to the detection head of the detection switch, the proximity switch controls the demagnetizing switch to be in a closing state, so that demagnetizing operation cannot be performed in the lifting process, when the lifting appliance lands, the detection surface of the rotation detection device rotates to the position opposite to the detection head of the proximity switch, so that the demagnetizing operation can be performed only when the lifting appliance lands, and the most direct effect of the landing detection function is that the lifted steel is guaranteed not to drop due to the error demagnetizing (improper operation) of the magnetic lifting appliance; the demagnetizing operation can be performed only after the steel material has been safely landed.

3. According to the utility model, the spring connecting rods which slide up and down along the cross beam are arranged at the two ends of the cross beam, when the telescopic electromagnetic assembly and the fixed electromagnetic assembly are in a hoisting state, the electromagnetic chuck is adjusted to keep contact with the steel plate at any time through the upward and downward sliding of the spring connecting rods on the cross beam when the steel plate shakes or deforms, and the springs play a buffering role, so that the possibility that the steel plate falls due to electromagnetic failure caused by the fact that part of the electromagnetic chuck is not contacted with the steel plate is avoided.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Figure 1 is a schematic diagram of the overall structure of the present utility model,

figure 2 is a right side view and cross-sectional view of the present utility model,

figure 3 is a schematic view of the front view part structure of the present utility model,

figure 4 is an enlarged schematic view of the structure of figure 3 at a in accordance with the present utility model,

figure 5 is a schematic view of the structure of the regulating roller assembly of the present utility model,

figure 6 is a schematic view of the telescopic beam assembly of the present utility model,

figure 7 is a schematic view of the structure of the telescopic electromagnetic assembly and the fixed electromagnetic assembly of the utility model,

fig. 8 is a schematic structural diagram of the floor detection assembly of the present utility model.

In the figure: 1. four-point hoisting structure, 2, fixed beam assembly, 3, telescopic beam assembly, 4, power device, 5, telescopic electromagnetic assembly, 6, fixed electromagnetic assembly, 7, adjusting roller assembly, 8, floor detection assembly, 11, fixed ear seat, 21, first slide, 22, second slide, 31, rack, 32, guide roller, 33, balance bar, 41, gear motor, 42, gear, 51, crossbeam, 52, chain, 53, electromagnetic chuck, 54, spring connecting rod, 55, spring, 71, roller support frame, 72, adjusting roller, 81, proximity switch, 82, rotation shaft, 83, rotation detection device, 84, notch, 85, detection surface.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1, the telescopic lifting electromagnet lifting appliance comprises a four-point lifting structure 1, a fixed beam assembly 2, a telescopic beam assembly 3 and a power device 4, wherein the four-point lifting structure 1 is connected with the upper part of the fixed beam assembly 2, the four-point lifting structure 1 is used for lifting the electromagnet lifting appliance by a lifting machine, two ends of the fixed beam assembly 2 are respectively and slidably connected with the telescopic beam assembly 3, as shown in fig. 2, a first slideway 21 and a second slideway 22 are arranged in the fixed beam assembly 2 in parallel, and the two telescopic beam assemblies 3 are arranged in the first slideway 21 and the second slideway 22 and move in a telescopic way relatively to each other; through above-mentioned technical scheme, set up the purpose of a flexible roof beam subassembly 3 in two slides respectively in order to shorten the length of fixed roof beam subassembly 2 and enlarge the stroke of flexible roof beam, can adapt to the hoist and mount of the steel sheet of steel sheet specification length, and area is less under flexible state. The fixed beam assembly 2 is provided with at least one fixed electromagnetic assembly 6, the two telescopic beam assemblies 3 are provided with at least one telescopic electromagnetic assembly 5, the fixed beam assembly 2 is provided with a power device 4, the power device 4 comprises a gear motor 41 and a gear 42, the top of the two telescopic beam assemblies 3 is provided with a rack 31, the gear 42 is meshed with the rack 31, the gear 42 is driven to rotate by the gear motor 41, and the gear 42 drives the rack 31 to move so as to drive the telescopic beam assemblies 3 to slide in a telescopic manner in the fixed beam assemblies 2; at least one group of guide rollers 32 are arranged on the upper surface and the lower surface of the telescopic beam assembly 3, the telescopic beam assembly 3 is contacted with the upper surface and the lower surface of the fixed beam assembly 2 through the guide rollers 32, so that friction force is reduced, the telescopic beam assemblies 3 are stretched smoothly, at least one group of adjusting roller assemblies 7 are also arranged on the outer bottom of the fixed beam assembly 2 corresponding to each telescopic beam assembly 3, the rollers of the adjusting roller assemblies 7 are contacted with the bottom of the telescopic beam assembly 3, and are used for supporting the telescopic beam assembly 3 and adjusting the distance between the bottom surface of the telescopic beam and the inner bottom surface of the fixed beam assembly 2, so that friction between the telescopic beam assembly 3 and the fixed beam assembly 2 is avoided; the floor detection assembly 8 is further arranged at the joint of the four-point lifting structure and the fixed beam assembly 2, whether the electromagnet lifting appliance is in a lifting state or not can be detected through the floor detection assembly 8, when the electromagnet lifting appliance is in the lifting state, demagnetization operation cannot be performed, and only when the electromagnet lifting appliance is in the floor state, demagnetization operation can be performed, so that potential safety hazards can be eliminated; as shown in fig. 7, the telescopic electromagnetic assembly 5 and the fixed electromagnetic assembly 6 both comprise a cross beam 51, a chain 52, an electromagnetic chuck 53, a spring connecting rod 54 and a spring 55, wherein the cross beam 51 spans and is arranged at the top of the fixed beam assembly 2 or the telescopic beam assembly 3, the spring connecting rod 54 sliding up and down along the cross beam 51 is arranged at two ends of the cross beam 51, the electromagnetic chuck 53 can be replaced by an electro-permanent magnetic chuck, the top of the spring connecting rod 54 is fixedly connected with the top of the spring 55, the bottom of the spring 55 contacts the top of the cross beam 51, the bottom of the spring connecting rod 54 is connected with one end of the chain 52, and the other end of the chain 52 is connected with the top of the electromagnetic chuck 53.

As shown in fig. 2, the gear motor 41 is disposed in the middle of the fixed beam assembly 2, and the gear 42 is disposed between the inner side surfaces of the two telescopic beam assemblies 3, and the racks 31 disposed at the tops of the two telescopic beam assemblies 3 are meshed with the gear 42.

As shown in fig. 4, a set of guide rollers 32 is disposed on a telescopic beam assembly 3, the set of guide rollers includes two guide rollers 32 disposed on top and bottom surfaces of an end portion of the telescopic beam assembly 3, a set of adjusting roller assemblies 7 are disposed at bottoms of two ends of the fixed beam assembly 2, and the adjusting roller assemblies 7 are disposed at bottoms of the first slideway 21 and the second slideway 22 respectively, by the above technical scheme, a set of guide rollers 32 are disposed at meshing ends of a rack 31 and a gear 42 of each telescopic beam assembly 3, and a set of adjusting roller assemblies 7 are disposed at lower ends of the fixed beam assembly 2 at bottom of an extending end of each telescopic beam assembly 3.

As shown in fig. 6, the adjusting roller assembly 7 includes two roller supporting frames 71, two roller supporting frames 71 are provided with elongated holes, the adjusting roller 72 is disposed on the two elongated holes, by the above technical scheme, when the extending end of the telescopic beam assembly 3 is offset downwards due to long-time use, the height of the adjusting roller 72 can be adjusted through the elongated holes, so that the telescopic beam assembly 3 is in a horizontal state, and the stress of the telescopic beam assembly 3 is balanced, so as to reduce the damage caused by friction of the gear 42 of the rack 31.

As shown in fig. 6, the end surfaces on two sides of the telescopic beam assembly 3 are further provided with balance bars 33, which are made of nylon, by the above technical scheme, the unbalanced force borne by the telescopic beam assembly 3 can be buffered by the contact between the balance bars and the inner surface of the first slideway 21 or the second slideway 22 of the fixed beam assembly 2, so that the friction to the telescopic beam assembly 3 is reduced.

Example 2

The utility model further adopts the technical scheme that: the two gear motors 41 are symmetrically arranged at the upper end parts of the first slide rail 21 and the second slide rail 22 along the middle part of the fixed beam assembly 2, and by adopting the technical scheme, the stroke of the telescopic beam assembly 3 can be increased to the maximum extent on the premise that the length of the fixed beam assembly 2 is fixed.

Example 3

One implementation form of the floor detection assembly 8 is: as shown in fig. 5 and 8, the landing detection assembly 8 includes a proximity switch 81 and a rotation detection device 83, the four-point lifting structure 1 is connected with a fixed ear seat 11 of the fixed beam assembly 2 through a rotation shaft 82, the rotation detection device 83 rotates coaxially with the rotation shaft 82, the proximity switch 81 is arranged on the fixed ear seat 11, the rotation detection device 83 is provided with a notch 84 and a detection surface 85, the detection distance of the detection switch is set, when the lifting appliance lifts and lands, the rotation shaft 82 rotates to drive the rotation detection device 83 to rotate synchronously, when the lifting appliance is in a lifting state, the notch 84 of the rotation detection device 83 rotates to the detection head opposite position of the detection switch, the proximity switch 81 controls the demagnetizing switch to be in a closed state, so that the demagnetizing switch is not in an open state during lifting, and therefore, only when the lifting appliance lands, the demagnetizing operation can be performed, the landing detection function has the most direct effect that the steel is guaranteed due to improper demagnetizing operation of the lifting appliance due to falling; the demagnetizing operation can be performed only after the steel material has been safely landed, and other structures such as a controller and a circuit, which are also required for realizing the landing detection by the proximity switch 81, are known in the art, and the present utility model will not be described.

One specific example according to the above embodiment is: as shown in fig. 2, the fixed beam assembly 2 is a frame welded by steel plates with rectangular cross sections and open ends, the middle is separated by a vertical partition plate to form a first slideway 21 on the left side and a second slideway 22 on the right side, a central opening is arranged at the top of the fixed beam assembly 2 and used for installing a gear motor 41, a distribution box body is externally installed on the gear motor 41 and used for protecting the gear motor 41 and installing a controller assembly, a telescopic beam assembly 3 is respectively inserted from the left end of the first slideway 21 and the right end of the second slideway 22 to the middle, the telescopic beam assembly 3 is a steel beam with rectangular cross section, when the telescopic beam assembly 3 is positioned in the middle of the fixed beam assembly 2, two fixed electromagnetic assemblies 6 are symmetrically installed on the fixed beam assembly 2 along the center line of the fixed beam assembly 2, and two telescopic electromagnetic assemblies 5 are respectively installed on the two telescopic beam assemblies 3. The two telescopic electromagnetic assemblies 5 are also symmetrical along the central line of the fixed beam assembly 2, racks 31 arranged along the length direction are arranged at the top of the telescopic beam assembly 3, and the front surface and the rear surface of the telescopic beam assembly 3 are provided with gears 42 so that the racks 31 of the gears 42 are matched; the four corner ends of the two sides of the fixed beam component 2 are provided with fixed lugs 11 which are connected through four large chains, and the other ends of the four chains are connected through a hanging ring to form a hanging point, and the structure is a four-point hanging structure; after the telescopic electromagnetic assemblies 5 and the cross beams 51 of the fixed electromagnetic assemblies 6 are installed and fixed, the middle lines are positioned on the same straight line, the electromagnetic chucks 53 are guaranteed to be positioned on the same straight line, one or two cross beams 51 can be arranged on each telescopic electromagnetic assembly 5 or the fixed electromagnetic assembly 6, one cross beam 51 is fixed by two chains 52, the two cross beams 51 are fixed by four chains 52, and the electromagnetic wire coil is better and stable due to the two cross beams 51 and better balance.

During the use, adopt other hoist to hoist the structure of lifting by crane to four points, make the electro-magnet hoist remove to working position, can carry out the adjustment of flexible roof beam subassembly 3 according to steel sheet length this moment, open the motor, the motor drives gear 42 rack 31 motion, make two flexible crossbeam 51 subassemblies respectively to both ends or respectively to the centre synchronous motion, make electro-magnet hoist whereabouts to steel sheet top after adjusting the length of flexible roof beam subassembly 3, fixed roof beam subassembly 2 bottom is provided with the support, support fixed roof beam subassembly 2, then flexible electromagnetic assembly 5 and fixed electromagnetic assembly 6's electromagnet 53 and steel sheet contact, the detection subassembly 8 detects whether falls to the ground completely, can fill and put the magnetism operation this moment, carry out the magnetization of electromagnet 53, electromagnet 53 is effective, consequently, can adsorb the steel sheet on electromagnet 53, then hoist and mount and make the steel sheet remove other positions, hoist and mount in-process, the detection subassembly 8 detects, flexible crossbeam 51 is in the hoist and mount state, will not be able to carry out the operation of filling and putting magnetism, even bump by mistake also can not make electromagnet 53 inefficacy, the security has been greatly improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A telescopic lifting electromagnet lifting appliance is characterized in that: the lifting device comprises four-point lifting structures (1), fixed beam assemblies (2), telescopic beam assemblies (3) and power devices (4), wherein the four-point lifting structures (1) are connected with the upper parts of the fixed beam assemblies (2), two ends of each fixed beam assembly (2) are respectively and slidably connected with one telescopic beam assembly (3), at least one fixed electromagnetic assembly (6) is arranged on each fixed beam assembly (2), at least one telescopic electromagnetic assembly (5) is arranged on each telescopic beam assembly (3), the power devices (4) are arranged on each fixed beam assembly (2), each power device (4) comprises a speed reducing motor (41) and a gear (42), racks (31) are arranged at the tops of the two telescopic beam assemblies (3), the gears (42) are meshed with the racks (31), and the speed reducing motors (41) drive the gears (42) to rotate, and the gears (42) drive the racks (31) to move so as to drive the telescopic beam assemblies (3) to slide along the fixed beam assemblies (2); at least one group of guide rollers (32) are arranged on the upper surface and the lower surface of the telescopic beam assembly (3); the joint of the four-point lifting structure (1) and the fixed beam assembly (2) is also provided with a landing detection assembly (8); the telescopic electromagnetic assembly (5) and the fixed electromagnetic assembly (6) comprise a cross beam (51), a chain (52), an electromagnetic chuck (53), a spring connecting rod (54) and a spring (55), wherein the cross beam (51) spans and is arranged at the top of the fixed beam assembly (2) or the telescopic beam assembly (3), the spring connecting rod (54) sliding up and down along the cross beam (51) is arranged at the two ends of the cross beam (51), the top of the spring connecting rod (54) is fixedly connected with the top of the spring (55), the bottom of the spring (55) is contacted with the top of the cross beam (51), the bottom of the spring connecting rod (54) is connected with one end of the chain (52), and the other end of the chain (52) is connected with the top of the electromagnetic chuck (53).

2. The telescopic lifting electromagnet spreader of claim 1, wherein: the fixed beam assembly (2) is internally provided with a first slide way (21) and a second slide way (22) in parallel, and the two telescopic beam assemblies (3) are arranged in the first slide way (21) and the second slide way (22) and move towards the telescopic direction relatively.

3. The telescopic lifting electromagnet spreader of claim 2, wherein: the gear motor (41) is arranged in the middle of the fixed beam assembly (2), the gear (42) is arranged between the inner side surfaces of the two telescopic beam assemblies (3), and the racks (31) arranged at the tops of the two telescopic beam assemblies (3) are meshed with the gear (42).

4. The telescopic lifting electromagnet spreader of claim 1, wherein: the two speed reducing motors (41) are symmetrically arranged at the upper end parts of the first slide way (21) and the second slide way (22) along the middle part of the fixed beam assembly (2).

5. A telescopic lifting electromagnet spreader according to claim 3, wherein: one telescopic beam component (3) on be provided with a set of guide cylinder (32), a set of guide cylinder (32) are including setting up two guide cylinders on the top surface and the bottom surface of the tip of telescopic beam component (3), the bottom at the both ends of fixed beam component (2) respectively be provided with a set of regulating cylinder subassembly (7), and regulating cylinder subassembly (7) set up the bottom at first slide (21) and second slide (22) respectively.

6. The telescopic lifting electromagnet spreader of claim 5, wherein: the adjusting roller assembly (7) comprises two roller supporting frames (71), strip holes are formed in the two roller supporting frames (71), and the adjusting roller (72) is arranged on the two strip holes.

7. The telescopic lifting electromagnet spreader of claim 6, wherein: balance bars (33) are further arranged on the end faces of the two sides of the telescopic beam assembly (3).

8. The telescopic lifting electromagnet spreader of claim 1, wherein: the floor detection assembly (8) comprises a proximity switch (81) and a rotation detection device (83), the four-point lifting structure (1) is connected with a fixed lug seat (11) of the fixed beam assembly (2) through a rotating shaft (82), the rotation detection device (83) and the rotating shaft (82) coaxially rotate, the proximity switch (81) is arranged on the fixed lug seat (11), and a notch (84) and a detection surface (85) are arranged on the rotation detection device (83).