CN220245250U - Telescopic lifting electromagnet lifting appliance - Google Patents

Abstract

The utility model relates to the technical field of electromagnetic or electric permanent magnet slings for lifting. It mainly discloses a telescopic lifting electromagnet sling. A four-point lifting mechanism is connected to the upper part of a fixed beam assembly. Both ends of the fixed beam assembly slide. There is a telescopic beam component connected to the fixed beam component, and a fixed electromagnetic component is provided on the two telescopic beam components. A telescopic electromagnetic component is provided on both telescopic beam components. A reduction motor and a gear are provided on the fixed beam component. A rack is provided on the top of the two telescopic beam components. , the gear drives the rack to move, thereby driving the telescopic beam assembly to telescopically slide along the fixed beam assembly. A guide roller is provided on the telescopic beam assembly. The telescopic beam assembly contacts the upper and lower sides of the fixed beam assembly through the guide roller, and also includes a landing detection component. And the electromagnetic component is connected to the electromagnetic chuck or electro-permanent magnetic chuck through a spring connecting rod. The gear rack is not easily damaged, has a landing detection function, and does not cause the risk of falling due to shaking during hoisting, which improves the safety of the equipment.

Description

A telescopic lifting electromagnet spreader

Technical field

The utility model relates to the technical field of electromagnetic slings for lifting, in particular to a telescopic lifting electromagnetic sling.

Background technique

The electromagnetic spreader is a magnetic equipment that uses electro-permanent magnet technology to achieve lifting. It has the advantages of safety, energy saving, high efficiency and convenience, and is widely used in steel, metallurgy, shipbuilding and other industries. The electro-permanent magnet spreader usually consists of a beam and an electro-permanent magnet chuck. The upper end of the beam is connected to the crane, and the lower end is connected to the electro-permanent magnet chuck. The material is adsorbed and released by controlling the magnetization and demagnetization of the electro-permanent magnet chuck.

In the field of steel plate lifting, since the steel plates produced by steel plants are of different lengths and have many specifications and models, in traditional lifting, electromagnetic suction cup lifting beams are usually used to lift steel plates. However, for steel plates of different sizes, cranes of corresponding lengths need to be replaced. The beam is suitable for the length of the steel plate, but each replacement takes more than an hour, and requires the cooperation of multiple people to complete the replacement. The work efficiency is very low, a waste of time and manpower, and the operation is inconvenient. It is used for lifting long-sized steel plates; existing technology 1. The telescopic lifting beam is used for lifting steel plates. 1. The telescopic drive is driven by a hydraulic cylinder. This device requires a hydraulic station, hydraulic cylinder, oil pipe and other devices. It is bulky, has high processing precision and is expensive; 2. Telescopic lifting beams driven by motors, reducers and wire ropes, such as the telescopic beam for lifting disclosed in Chinese invention patent CN 107055319 B, have complex structures and high maintenance costs; 3. Gear and rack driving methods, such as Chinese Utility Model Patent CN 204490360 U discloses a telescopic mechanism for a rack-and-pinion container spreader. The device has a simple structure, but has a high failure rate and high processing accuracy requirements. The long-stroke gear rack is prone to bending due to force and is prone to damage due to overload. During the lifting operation, the telescopic beam and the main beam of the telescopic lifting beam are greatly deflected and deformed, causing certain damage to the internal driving components.

In summary, the rack-and-pinion driving method has the advantage of simple structure, but: 1. Due to the lifting work, the telescopic beam and the main beam are susceptible to deflection and deformation, which can easily cause damage to the gear and rack; 2. The existing Whether it is a permanent magnet type magnetic spreader, an electromagnetic magnetic spreader or an electro-permanent magnet spreader, it all needs to be controlled by manual buttons or remote control. It requires staff to control it from the side. The risk of human error is high. If you are lifting If you accidentally press the demagnetization button during the process, a falling accident will occur, which poses a great safety risk; 3. The existing connection between the electromagnetic component and the fixed beam or telescopic beam is only fixed by two or four chains. Since the steel plate is hoisted There will be a certain degree of flexible deformation and the sway of the spreader. The distance between the electromagnetic chuck and the steel plate is fixed, so during the shaking or deformation process, the contact surface between the electromagnetic chuck and the steel plate will be partially out of contact. As a result, some areas of the electromagnetic chuck may fail, resulting in the risk of the steel plate falling.

Utility model content

The purpose of this utility model is to provide a telescopic lifting electromagnet spreader to solve the problem in the above-mentioned background technology that the gear rack is damaged due to the deflection deformation caused by the lifting weight and the system's own weight. The electromagnet spreader does not have a landing detection function and the existing electromagnetic components are at risk of falling due to shaking during hoisting, which poses a serious safety hazard.

To achieve the above purpose, the technical solution of the present utility model is a telescopic lifting electromagnet sling, which includes a four-point lifting structure, a fixed beam assembly, a telescopic beam assembly and a power device. The four-point lifting structure and the fixed beam assembly The four-point lifting structure is used for hoisting machinery to hoist the electromagnet sling. Both ends of the fixed beam assembly are slidingly connected to a telescopic beam assembly. The fixed beam assembly is provided with at least one fixed beam assembly. Electromagnetic assembly, the two telescopic beam assemblies are provided with at least one telescopic electromagnetic assembly, the fixed beam assembly is provided with a power device, the power device includes a reduction motor and a gear, and the two telescopic beam assemblies are equipped with at least one telescopic electromagnetic assembly. A rack is provided on the top of the beam assembly, and the gear meshes with the rack. The gear is driven by the reduction motor to rotate, and the gear drives the rack to move, thereby driving the telescopic beam assembly to telescopically slide along the fixed beam assembly; the upper and lower sides of the telescopic beam assembly are At least one set of guide rollers is provided. The telescopic beam assembly contacts the upper and lower sides of the fixed beam assembly through the guide rollers to reduce friction and make the telescopic beam assembly expand and contract smoothly. The outside of the fixed beam assembly corresponding to each telescopic beam assembly The bottom is also provided with at least one set of adjusting roller assemblies. The rollers of the adjusting roller assembly are in contact with the bottom of the telescopic beam assembly to support the telescopic beam assembly and adjust the distance between the bottom surface of the telescopic beam and the inner bottom surface of the fixed beam assembly to prevent the telescopic beam from moving. There is friction between the component and the fixed beam component; a landing detection component is also provided at the connection between the four-point lifting structure and the fixed beam component. The landing detection component can detect whether the electromagnet spreader is in a hoisting state. When the electromagnet spreader When in the hoisting state, the demagnetization operation cannot be performed. The demagnetization operation can only be performed when the electromagnet spreader falls to the ground, so safety hazards can be eliminated; the telescopic electromagnetic components and fixed electromagnetic components include beams, chains, electromagnetic chucks, Spring connecting rod and spring, the cross beam is installed across the top of the fixed beam assembly or the telescopic beam assembly, and spring connecting rods that slide up and down along the beam are provided at both ends of the beam, and the top of the spring connecting rod is fixedly connected to the top of the spring. The bottom of the spring contacts the top of the beam, the bottom end of the spring connecting rod is connected to one end of the chain, and the other end of the chain is connected to the top of the electromagnetic chuck. Through the above technical solution, when the telescopic electromagnetic assembly and the fixed electromagnetic assembly are in the hoisting state When the steel plate is in the state, due to the shaking or deformation of the steel plate, the spring connecting rod slides up and down the crossbeam to adjust the electromagnetic chuck to keep in contact with the steel plate at all times. The spring acts as a buffer, so that there will be no electromagnetic failure caused by partial electromagnetic chuck and the steel plate not being in contact. Possibility of steel plate falling.

A further technical solution of the present invention is that: a first slideway and a second slideway are arranged side by side inside the fixed beam assembly, and the two telescopic beam assemblies are arranged inside the first slideway and the second slideway; The two telescopic beam assemblies telescopically move relative to each other; through the above technical solution, the purpose of setting up a telescopic beam assembly in each of the two slideways is to shorten the length of the fixed beam assembly and at the same time expand the stroke of the telescopic beam, which can adapt to the steel plate specification length. It can be easily hoisted and occupies a small area in the telescopic state.

A further technical solution of the present invention is that the reduction motor is arranged in the middle of the fixed beam assembly, and the gear is arranged between the inner sides of the two telescopic beam assemblies, and the two racks are arranged on the top of the telescopic beam assemblies. Engaging with the gear, through the above technical solution, a reduction motor is used in the middle of the fixed beam assembly to control the rotation of a gear, and a gear drives two racks to move toward each other. The purpose of this design is to ensure a certain stroke of the telescopic beam assembly. Under the premise, the use of reduction motors is reduced, thereby controlling manufacturing costs.

A further technical solution of the present invention is that there are two said reduction motors, and the two said reduction motors are symmetrically arranged at the upper ends of the first slideway and the second slideway along the middle part of the fixed beam assembly. Through this technical solution, the stroke of the telescopic beam component can be maximized while the length of the fixed beam component is fixed.

A further technical solution of the present invention is that a telescopic beam assembly is provided with a set of guide rollers, and the set of guide rollers includes two guide rollers on the top and bottom surfaces of the ends of the telescopic beam assembly, and the fixed beam A set of adjusting roller assemblies are respectively provided at the bottom of both ends of the assembly, and the adjusting roller assemblies are respectively arranged at the bottom of the first slideway and the second slideway. Through the above technical solution, the meshing of the rack and the gear of each telescopic beam assembly A set of guide rollers is set at the end of each telescopic beam assembly, and a set of adjusting roller assemblies are set at the lower end of the fixed beam assembly at the bottom of the extended end of each telescopic beam assembly. According to the force analysis, it can reduce the damage caused by the telescopic beam assembly lifting the steel plate and its own weight. The biased weight will cause the rack to deform, thereby reducing damage to the gear rack and extending the service life of the spreader.

A further technical solution of the present invention is that the adjusting roller assembly includes two roller support frames, both of the two roller support frames are provided with elongated holes, and the adjusting roller is arranged on the two elongated holes. Through the above technical solution, when the extended end of the telescopic beam assembly shifts downward due to long-term use, the height of the roller can be adjusted through the long hole to keep the telescopic beam assembly in a horizontal state, thereby causing the telescopic beam assembly to bear force. Balance to reduce damage caused by friction of the rack and gear.

A further technical solution of the present invention is that balance bars are also provided on both sides of the telescopic beam assembly. Through the above technical solution, the first slide or the second slide of the guide rail and the fixed beam assembly The inner surface contact of the channel can buffer the unbalanced force on the telescopic beam assembly, thereby reducing friction on the telescopic beam assembly.

A further technical solution of the present invention is that the landing detection component includes a proximity switch and a rotation detection device, the four-point lifting structure is connected to the fixed ear seat of the fixed beam component through a rotation axis, and the rotation detection device rotates coaxially with the rotation axis , the proximity switch is set on the fixed ear seat, and the rotation detection device is provided with a notch and a detection surface to set the detection distance of the detection switch. Through the above technical solution, when the spreader is lifted and landed, the rotation shaft will rotate, driving the rotation detection The device rotates synchronously. When the spreader is in the lifting state, the notch of the rotation detection device rotates to the position directly facing the detection head of the detection switch. The proximity switch controls the demagnetization switch to be in a closed state, so that the demagnetization operation cannot be performed during the lifting process. When the spreader When landing, the detection surface of the rotation detection device rotates to the position facing the proximity switch detection head, thereby controlling the demagnetization switch to be in an open state. Therefore, the demagnetization operation can only be performed when the vehicle lands. The most direct function of the landing detection function is to ensure that the person being hoisted The lifted steel will not fall due to incorrect demagnetization (improper operation) of the magnetic spreader; the demagnetization operation can only be performed after the steel has landed safely on the ground.

Compared with the existing technology, the beneficial effects of this utility model are:

1. This utility model installs multiple fixed electromagnetic assemblies at the bottom of the fixed beam assembly and multiple telescopic electromagnetic assemblies on the telescopic beam assembly. By telescopically extending the telescopic beam assembly in the fixed beam assembly, the length of the entire spreader can be adjusted to suit different conditions. For hoisting long steel plates, the driving mechanism to realize the telescopic function adopts a simple rack and pinion structure, which can reduce the production cost of the entire hoisting device. Moreover, guide rollers and adjustments are provided on the telescopic beam components to prevent deflection and deformation of the telescopic beam components. The roller assembly can reduce the damage caused by friction on the rack and gear, thereby increasing the service life of the spreader.

2. This utility model sets a landing detection component at the connection between 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, and then determines whether the spreader is in a lifting state. When the spreader is lifted and landed, , the rotating shaft will rotate, driving the rotation detection device to rotate synchronously. When the spreader is in the lifting state, the notch of the rotation detection device rotates to the position facing the detection head of the detection switch, and the proximity switch controls the demagnetization switch to be in a closed state, so that during the lifting Demagnetization operation cannot be performed during the process. When the spreader falls to the ground, the detection surface of the rotation detection device rotates to the position facing the proximity switch detection head, thereby controlling the demagnetization switch to be in the open state. Therefore, the demagnetization operation can only be performed when the spreader falls to the ground. Landing detection The most direct function of this function is to ensure that the lifted steel will not fall due to incorrect demagnetization (improper operation) of the magnetic spreader; the demagnetization operation can only be performed when the steel has landed safely on the ground.

3. This utility model is provided with spring connecting rods that slide up and down along the beam at both ends of the beam. When the telescopic electromagnetic assembly and the fixed electromagnetic assembly are in a hoisting state, due to the shaking or deformation of the steel plate, the spring connecting rods are used to slide up and down the beam. Slide to adjust the electromagnetic chuck to keep in contact with the steel plate at all times, and the spring acts as a buffer, so that there is no possibility that some of the electromagnetic chuck and the steel plate are not in contact, causing electromagnetic failure and causing the steel plate to fall.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

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

Figure 2 is a right side view and a cross-sectional view of the utility model.

Figure 3 is a partial structural schematic diagram of the front view of the present utility model.

Figure 4 is an enlarged schematic diagram of the structure at point A in Figure 3 of the present invention.

Figure 5 is a schematic structural diagram of the adjusting roller assembly of the present utility model.

Figure 6 is a schematic structural diagram of the telescopic beam assembly of the present utility model.

Figure 7 is a schematic structural diagram of the telescopic electromagnetic assembly and the fixed electromagnetic assembly of the present utility model.

Figure 8 is a schematic structural diagram of the landing detection component of the present utility model.

In the picture: 1. Four-point lifting structure, 2. Fixed beam component, 3. Telescopic beam component, 4. Power device, 5. Telescopic electromagnetic component, 6. Fixed electromagnetic component, 7. Adjusting drum component, 8. Landing detection component , 11. Fixed ear seat, 21. First slideway, 22. Second slideway, 31. Rack, 32. Guide roller, 33. Balance bar, 41. Reduction motor, 42. Gear, 51. Cross beam, 52 , chain, 53. electromagnetic chuck, 54. spring connecting rod, 55. spring, 71. roller support frame, 72. adjusting roller, 81. proximity switch, 82. rotating shaft, 83. rotation detection device, 84. notch, 85 , detection surface.

Detailed ways

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

Example 1

As shown in Figure 1, a telescopic lifting electromagnet spreader includes a four-point lifting structure 1, a fixed beam assembly 2, a telescopic beam assembly 3 and a power device 4. The four-point lifting structure 1 and the fixed beam assembly 2, the four-point lifting structure 1 is used for hoisting machinery to hoist the electromagnet sling. The two ends of the fixed beam assembly 2 are each slidingly connected to a telescopic beam assembly 3, as shown in Figure 2. A first slideway 21 and a second slideway 22 are arranged side by side inside the fixed beam assembly 2, and the two telescopic beam assemblies 3 are provided in the first slideway 21 and the second slideway 22, and the two telescopic beam assemblies 3 3 relative telescopic movement; through the above technical solution, the purpose of arranging a telescopic beam assembly 3 in the two slideways is to shorten the length of the fixed beam assembly 2 and at the same time expand the stroke of the telescopic beam, which can adapt to the hoisting of steel plates with specified lengths. , and occupies a smaller area in the telescopic state. The fixed beam assembly 2 is provided with at least one fixed electromagnetic assembly 6, and both of the 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 includes a reduction motor 41 and a gear 42. A rack 31 is provided on the top of the two telescopic beam assemblies 3. The gear 42 meshes with the rack 31, and the reduction motor 41 drives the gear 42 to rotate. 42 drives the rack 31 to move, thereby driving the telescopic beam assembly 3 to telescopically slide along the fixed beam assembly 2; at least one set of guide rollers 32 are provided on the upper and lower surfaces of the telescopic beam assembly 3, and the telescopic beam assembly 3 communicates with the telescopic beam assembly 3 through the guide rollers 32. The upper and lower sides of the fixed beam assembly 2 are in contact to reduce friction and make the telescopic beam assembly 3 expand and contract smoothly. At least one set of adjusting roller assemblies is also provided on the outer bottom of the fixed beam assembly 2 corresponding to each telescopic beam assembly 3. 7. Adjust the contact between the roller of the roller assembly 7 and the bottom of the telescopic beam assembly 3 to support the telescopic beam assembly 3 and adjust the distance between the bottom surface of the telescopic beam and the inner bottom surface of the fixed beam assembly 2 to avoid the telescopic beam assembly 3 and the fixed beam assembly. 2; the connection between the four-point lifting structure and the fixed beam assembly 2 is also provided with a landing detection component 8. Through the landing detection component 8, it can be detected whether the electromagnet spreader is in a hoisting state. When the electromagnet spreader is in In the hoisting state, the demagnetization operation cannot be performed. The demagnetization operation can only be performed when the electromagnet spreader falls to the ground, so safety hazards can be eliminated. As shown in Figure 7, the telescopic electromagnetic assembly 5 and the fixed electromagnetic assembly 6 include Cross beam 51, chain 52, electromagnetic chuck 53, spring connecting rod 54 and spring 55. The cross beam 51 is installed across the top of the fixed beam assembly 2 or the telescopic beam assembly 3. At both ends of the cross beam 51, there are provided up and down along the cross beam 51 The sliding spring connecting rod 54 and the electromagnetic sucker 53 can be replaced by an electric permanent magnetic sucker. The top of the spring connecting rod 54 is fixedly connected to the top of the spring 55. The bottom of the spring 55 contacts the top of the cross beam 51. The spring connecting rod 54 The bottom end of the chain 52 is connected to one end of the chain 52, and the other end of the chain 52 is connected to the top of the electromagnetic chuck 53. Through the above technical solution, when the telescopic electromagnetic assembly 5 and the fixed electromagnetic assembly 6 are in a hoisting state, due to the shaking or deformation of the steel plate, The spring connecting rod 54 slides up and down the beam 51 to adjust the electromagnetic chuck 53 to keep in contact with the steel plate at all times. The spring 55 acts as a buffer, thereby preventing the possibility of electromagnetic failure caused by partial electromagnetic chuck 53 not contacting the steel plate and causing the steel plate to fall.

As shown in Figure 2, the reduction motor 41 is arranged in the middle of the fixed beam assembly 2, and the gear 42 is arranged between the inner sides of the two telescopic beam assemblies 3. The teeth provided on the top of the two telescopic beam assemblies 3 The rack 31 meshes with the gear 42. Through the above technical solution, a reduction motor 41 is used in the middle of the fixed beam assembly 2 to control the rotation of a gear 42, and a gear 42 drives the two racks 31 to move toward each other. The purpose of this design is to ensure Under the premise of a certain stroke of the telescopic beam assembly 3, the use of the reduction motor 41 is reduced, thereby controlling the manufacturing cost.

As shown in Figure 4, a telescopic beam assembly 3 is provided with a set of guide rollers 32. The set of guide rollers includes two guide rollers 32 on the top and bottom surfaces of the ends of the telescopic beam assembly 3. The fixed beam A set of adjusting roller assemblies 7 are respectively provided at the bottoms of both ends of the assembly 2, and the adjusting roller assemblies 7 are respectively provided at the bottoms of the first slideway 21 and the second slideway 22. Through the above technical solution, at each telescopic beam assembly 3 A set of guide rollers 32 is provided at the meshing end of the rack 31 and the gear 42, and a set of adjusting roller assemblies 7 are provided at the lower end of the fixed beam assembly 2 at the bottom of the extended end of each telescopic beam assembly 3. According to the stress analysis, it can be reduced Due to the telescopic beam assembly 3 lifting the steel plate and its own weight, one end is biased, which deforms the rack 31, thereby reducing damage to the gear 42 and rack 31, thereby increasing the service life of the spreader.

As shown in Figure 6, the adjustment roller assembly 7 includes two roller support frames 71. Both of the two roller support frames 71 are provided with long holes, and the adjustment roller 72 is provided on the two long holes. Through the above technical solution, when the extended end of the telescopic beam assembly 3 deviates downward due to long-term use, the height of the roller 72 can be adjusted through the long hole so that the telescopic beam assembly 3 is in a horizontal state, thereby making the telescopic beam The force of component 3 is balanced to reduce damage caused by the friction of rack 31 and gear 42.

As shown in Figure 6, balance bars 33 are also provided on both sides of the telescopic beam assembly 3. The balance bars are made of nylon. Through the above technical solution, through the balance bars and the first part of the fixed beam assembly 2 The inner surface contact of the slideway 21 or the second slideway 22 can buffer the unbalanced force on the telescopic beam assembly 3, thereby reducing friction on the telescopic beam assembly 3.

Example 2

A further technical solution of the present invention is that there are two reduction motors 41 , and the two reduction motors 41 are symmetrically arranged on the first slideway 21 and the second slideway 22 along the middle part of the fixed beam assembly 2 Through this technical solution, the stroke of the telescopic beam assembly 3 can be maximized while the length of the fixed beam assembly 2 is fixed.

Example 3

One implementation form of the landing detection component 8 is: as shown in Figure 5 and Figure 8, the landing detection component 8 includes a proximity switch 81 and a rotation detection device 83, four-point lifting structure 1 and fixed lugs of the fixed beam assembly 2 The base 11 is connected through the rotating shaft 82. The rotation detection device 83 rotates coaxially with the rotation axis 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 switch is set to Detection distance, through the above technical solution, when the spreader is lifted and landed, the rotating shaft 82 will rotate, driving the rotation detection device 83 to rotate synchronously. When the spreader is in the lifting state, the notch 84 of the rotation detection device 83 rotates to the detection switch. Directly opposite the detection head, the proximity switch 81 controls the demagnetization switch to be in a closed state, so that the demagnetization operation cannot be performed during the lifting process. When the spreader falls to the ground, the detection surface 85 of the rotation detection device 83 rotates to the position facing the detection head of the proximity switch 81 , thereby controlling the demagnetization switch to be on, so the demagnetization operation can only be performed when landing. The most direct function of the landing detection function is to ensure that the lifted steel will not fall due to incorrect demagnetization (improper operation) of the magnetic spreader. Falling; the demagnetization operation can only be performed when the steel has safely landed on the ground. Other structures such as controllers and circuits required by the proximity switch 81 to realize landing detection are existing technologies and will not be described in this utility model.

A specific example according to the above embodiment is: as shown in Figure 2, the fixed beam assembly 2 is a frame welded by steel plates with a rectangular cross-section and openings at both ends, and is separated by an upright partition in the middle to form the first left side. The slideway 21 and the second slideway 22 on the right side are opened in the top center of the fixed beam assembly 2 to install the reduction motor 41. A distribution box is installed outside the reduction motor 41 to protect the reduction motor 41 and install the controller. assembly, the shaft of the reduction motor 41 is vertically downward, and a telescopic beam assembly 3 is inserted from the left end of the first slideway 21 and the right end of the second slideway 22 to the middle respectively. The telescopic beam assembly 3 is a steel beam with a rectangular cross-section. When the telescopic beam assembly 3 is located in the middle of the fixed beam assembly 2, then 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 one telescopic electromagnetic assembly is installed on the two telescopic beam assemblies 3 respectively. 5. The two telescopic electromagnetic assemblies 5 are also symmetrical along the center line of the fixed beam assembly 2. The top of the telescopic beam assembly 3 is provided with a rack 31 arranged along the length direction. The telescopic beam assembly 3 is provided on both front and rear sides. A gear 42 is installed so that the gear 42 has teeth. 31 are matched with each other; fixed ear seats 11 are installed on the four corner ends of both sides of the fixed beam assembly 2, connected by four large chains, and the other ends of the four chains are connected by a lifting ring to form a lifting point. This structure is four Point lifting structure; after the telescopic electromagnetic component 5 and the cross beam 51 of the fixed electromagnetic component 6 are installed and fixed, the center line is located on the same straight line to ensure that the electromagnetic chuck 53 is located on the same straight line. Each telescopic electromagnetic component 5 or fixed electromagnetic component 6 can be provided with one Or two cross beams 51, one cross beam 51 is fixed by two chains 52, and two cross beams 51 are fixed by four chains 52. Using two cross beams 51 will make the electromagnetic coil more stable and balanced.

When in use, other slings are used to hoist the four-point lifting structure, so that the electromagnet sling is moved to the working position. At this time, the telescopic beam assembly 3 can be adjusted according to the length of the steel plate, and the motor is turned on, and the motor drives the gear 42 and rack 31 to move. Make the two telescopic beam components 51 move synchronously to both ends or to the middle respectively. After adjusting the length of the telescopic beam component 3, let the electromagnet spreader drop to the top of the steel plate. A bracket is provided at the bottom of the fixed beam component 2 to support the fixed beam component. 2. Then the telescopic electromagnetic assembly 5 and the electromagnetic chuck 53 of the fixed electromagnetic assembly 6 are in contact with the steel plate, and the landing detection assembly 8 detects whether it has completely landed. At this time, the magnet charging and discharging operations can be performed to magnetize the electromagnetic chuck 53. The electromagnetic chuck 53 is effective. , so the steel plate can be adsorbed on the electromagnetic chuck 53, and then hoisted to move the steel plate to other positions. During the hoisting process, the landing detection component 8 detects that the telescopic beam 51 is in a hoisting state. At this time, the magnet charging and discharging operations will not be possible, even if An accidental touch will not cause the electromagnetic chuck 53 to fail, which greatly improves safety.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the rights All changes within the meaning and scope of the required equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.

Claims (8)

1. A telescopic lifting electromagnet spreader, characterized in that it includes a four-point lifting structure (1), a fixed beam assembly (2), a telescopic beam assembly (3) and a power device (4). The point lifting structure (1) is connected to the upper part of the fixed beam assembly (2). Both ends of the fixed beam assembly (2) are slidingly connected to a telescopic beam assembly (3). The fixed beam assembly (2) is At least one fixed electromagnetic assembly (6) is provided, and at least one telescopic electromagnetic assembly (5) is provided on both of the two telescopic beam assemblies (3). The fixed beam assembly (2) is provided with a power device ( 4). The power device (4) includes a reduction motor (41) and a gear (42). The two telescopic beam assemblies (3) are provided with a rack (31) on the top. The gear (42) and the gear The bars (31) engage, and the reduction motor (41) drives the gear (42) to rotate, and the gear (42) drives the rack (31) to move, thereby driving the telescopic beam assembly (3) to telescopically slide along the fixed beam assembly (2); At least one set of guide rollers (32) are provided on the upper and lower surfaces of the telescopic beam assembly (3); a landing detection assembly (8) is also provided at the connection between the four-point lifting structure (1) and the fixed beam assembly (2). ); the telescopic electromagnetic assembly (5) and the fixed electromagnetic assembly (6) both include a cross beam (51), a chain (52), an electromagnetic chuck (53), a spring connecting rod (54) and a spring (55). The cross beam (51) is installed across the top of the fixed beam assembly (2) or the telescopic beam assembly (3). At both ends of the cross beam (51), there are spring connecting rods (54) that slide up and down along the cross beam (51). The springs The top of the connecting rod (54) is fixedly connected to the top of the spring (55), the bottom of the spring (55) contacts the top of the cross beam (51), and the bottom end of the spring connecting rod (54) is connected to one end of the chain (52) Connect, the other end of the chain (52) is connected with the top of the electromagnetic chuck (53). 2. A telescopic lifting electromagnet spreader according to claim 1, characterized in that: a first slide (21) and a second slide (21) are arranged side by side inside the fixed beam assembly (2). 22), the two telescopic beam assemblies (3) are arranged in the first slideway (21) and the second slideway (22), and the two telescopic beam assemblies (3) telescopically move relative to each other. 3. A telescopic lifting electromagnet spreader according to claim 2, characterized in that: the reduction motor (41) is arranged in the middle of the fixed beam assembly (2), and the gear (42) is arranged in Between the inner surfaces of the two telescopic beam assemblies (3), the racks (31) provided on the tops of the two telescopic beam assemblies (3) mesh with the gears (42). 4. A telescopic lifting electromagnet spreader according to claim 1, characterized in that: there are two said reduction motors (41), and the two said reduction motors (41) are installed along the fixed beam. The middle part of the assembly (2) is symmetrically arranged at the upper ends of the first slideway (21) and the second slideway (22). 5. A telescopic lifting electromagnet spreader according to claim 3, characterized in that: one of the telescopic beam components (3) is provided with a set of guide rollers (32), and a set of guide rollers (32) ) includes two guide rollers provided on the top and bottom surfaces of the ends of the telescopic beam assembly (3), and a set of adjusting roller assemblies (7) are provided on the bottoms of both ends of the fixed beam assembly (2), and the adjustment The roller assembly (7) is respectively arranged at the bottom of the first slideway (21) and the second slideway (22). 6. A telescopic lifting electromagnet spreader according to claim 5, characterized in that: the adjustment roller assembly (7) includes two roller support frames (71), and the two roller supports The frame (71) is provided with long holes, and the adjusting roller (72) is provided on the two long holes. 7. A telescopic lifting electromagnet spreader according to claim 6, characterized in that balance bars (33) are provided on both sides of the telescopic beam assembly (3). 8. A telescopic lifting electromagnet spreader according to claim 1, characterized in that: the landing detection component (8) includes a proximity switch (81) and a rotation detection device (83), and four-point lifting The structure (1) is connected to the fixed ear seat (11) of the fixed beam assembly (2) through the rotating shaft (82), the rotation detection device (83) rotates coaxially with the rotating shaft (82), and the proximity switch (81) is set on the fixed On the ear seat (11), the rotation detection device (83) is provided with a notch (84) and a detection surface (85).