An electromagnetic lifting device with telescopic mechanism for front lifting

Abstract

This utility model discloses an electromagnetic lifting device with a telescopic mechanism for front-end lifting, comprising a frame beam, the lower end of which is connected to a telescopic mechanism. The telescopic mechanism includes a main beam, with a telescopic secondary beam inserted into each end of the main beam. A rack is fixedly connected to the middle of the upper surface of each secondary beam. A power unit is bolted to the mounting plate of the main beam. The power unit includes a motor and a reducer. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the gear via a key. The gear meshes with the rack. Hook plates are fixedly connected to both sides of the main beam and the outer ends of the secondary beams. Electromagnets are hooked to the hook plates via chains. This application can solve the problems of frequent lifting device switching, complex operation procedures, low work efficiency, and high equipment procurement and maintenance costs in the handling of steel plates and profiles with large length variations in existing electromagnetic lifting devices.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting devices for engineering machinery, and more specifically, to an electromagnetic lifting device with a telescopic mechanism for front-end lifting. Background Technology

[0002] Patent CN111573492A discloses a patent entitled "An Electromagnetic Lifting Device and Front-end Crane," which can perform material suction and release functions via a remote control in the cab. It also features power-off magnetic preservation and magnetic adjustment functions, enabling safe and rapid lifting of materials of different specifications. Due to its simple and safe structure, high degree of automation, high handling efficiency, quick and economical installation, it has been widely used in various industries such as port loading and unloading, steel manufacturing, and logistics warehousing.

[0003] However, in field operations, various types of goods, such as threaded bars, structural steel, billets, and slabs, need to be lifted and bundled. When lifting steel plates and structural steel with varying lengths, multiple sets of electromagnetic lifting devices of different lengths are often required for easy switching to accommodate different cargo lengths and ensure lifting safety. This leads to complex operating procedures, low work efficiency, and increased equipment procurement and maintenance costs. Therefore, there is a need to develop a highly practical electromagnetic lifting device that can adjust the distance between the electromagnet's magnetic attraction points in real time. This is of great significance for improving the flexibility, efficiency, and economic benefits of front-end lifting. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model provides an electromagnetic lifting device with a telescopic device for front-end lifting, which can solve the above problems.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0006] An electromagnetic lifting device with a telescopic mechanism for front-end lifting includes a frame beam. The lower end of the frame beam is connected to the telescopic mechanism, which includes a main beam. A telescopic secondary beam is inserted into each end of the main beam. A rack is fixedly connected to the middle of the upper surface of the secondary beam. A power unit is fixed to the mounting plate of the main beam by bolts. The power unit includes a motor and a reducer. The output shaft of the motor is connected to the input shaft of the reducer. The output shaft of the reducer is connected to the gear via a key. The gear meshes with the rack. Hook plates are fixedly connected to both sides of the main beam and the outer ends of the secondary beams. Electromagnets are hooked to the hook plates via chains.

[0007] Furthermore, the frame beam is a square frame structure, the frame beam includes an upper beam, the lower end of the upper beam is connected to a lower beam, the upper end surface of the upper beam is provided with a corrugated plate, the upper end of the upper beam is provided with corner pieces for connecting to the front hanger at the four corners, and the lower beam is provided with lifting lugs for connecting to the main beam at the four corners.

[0008] Furthermore, a generator, a transformer, a storage battery, a charging control cabinet, and a rectifier control cabinet are provided between the upper beam and the lower beam, wherein the generator is electrically connected to the rectifier control cabinet, the rectifier control cabinet is electrically connected to the transformer, the transformer is electrically connected to the charging control cabinet, and the charging control cabinet is electrically connected to the storage battery.

[0009] Furthermore, mounting seats are provided at both ends of the main beam, and the mounting seats are connected to the lifting lugs by means of axle pins. A junction box is provided in the middle of the front side of the main beam, and the rectifier control cabinet is electrically connected to the electromagnet and the motor through the junction box and cables.

[0010] Furthermore, two guide rails are fixedly connected to the upper end face of the secondary beam, and the two guide rails are symmetrically distributed on both sides of the rack.

[0011] Furthermore, the left and right ends of the main beam are each fixed with an upper guide device, a secondary upper guide device, a lower guide device, and a secondary lower guide device by bolts, and each of the upper guide device, the secondary upper guide device, the lower guide device, and the secondary lower guide device includes a roller.

[0012] Furthermore, the secondary beam is tumblingly connected between the roller of the upper guide device and the roller of the lower guide device, and the secondary beam is tumblingly connected between the roller of the upper guide device and the roller of the lower guide device. The inner side of the rollers on the upper guide device and the lower guide device is provided with a protruding rim, which is engaged with the inner side of the guide rail.

[0013] Furthermore, the gear is fixed to the main beam by a gear seat, and the gear is housed inside a gear cover.

[0014] Furthermore, the generator is a diesel generator.

[0015] The beneficial effects of this utility model are:

[0016] (1) The telescopic device of the electromagnetic lifting device of this application is equipped with guide devices at both ends of the main beam and rollers are installed in the guide devices. When the secondary beam is inserted along the insertion holes at both ends of the main beam, the rollers change the sliding friction between the main beam and the secondary beam into rolling friction, reducing the friction coefficient, so that the secondary beam can be smoothly and quickly inserted into the main beam, effectively reducing the wear of the secondary beam caused by friction during the telescopic process, and greatly improving the assembly efficiency and life of the electromagnetic lifting device.

[0017] (2) The telescopic device of the electromagnetic lifting device in this application is fixed to the frame beam, and the electromagnet is connected to the telescopic device. The extension and retraction of the telescopic device are driven by the power unit. The electromagnets on the secondary beam will move synchronously with the secondary beam. The distance of the magnetic adsorption points of the electromagnets configured under the secondary beam is changed to adapt to the lifting of steel plates and profiles of different lengths, avoiding frequent switching of lifting devices and greatly improving the efficiency and economic benefits of lifting work. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of an electromagnetic lifting device with a telescopic device for front lifting, as described in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the frame beam structure described in an embodiment of the present invention;

[0022] Figure 3 This is a front view of the telescopic device described in an embodiment of this utility model;

[0023] Figure 4 This is a top view of the telescopic device described in this embodiment of the utility model;

[0024] Figure 5 This is a front view of the telescopic device in the electromagnetic lifting device described in this embodiment of the present invention when it is fully extended;

[0025] Figure 6 This is a front view of the telescopic device in the electromagnetic lifting device described in this embodiment of the utility model when it is fully retracted.

[0026] In the picture:

[0027] 1. Frame beam; 11. Corner fittings; 12. Corrugated sheet; 13. Generator; 14. Upper beam; 15. Transformer; 16. Battery; 17. Charging control cabinet; 18. Rectifier control cabinet; 19. Lower beam; 110. Lifting lug; 2. Telescopic device; 21. Secondary beam; 210. Guide rail; 211. Rack; 212. Mounting base; 22. Mounting plate; 23. Main beam; 24. Junction box; 25. Upper guide device; 26. Secondary upper guide device; 27. Lower guide device; 28. Secondary lower guide device; 3. Power unit; 31. Gear cover; 32. Gear; 33. Gear seat; 29. ​​Hook plate; 4. Electromagnet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0029] like Figure 1-6 As shown, this utility model discloses an electromagnetic lifting device with a telescopic mechanism for front-end lifting, including a frame beam 1, a telescopic mechanism 2, a power unit 3, and an electromagnet 4. The frame beam mainly includes an upper beam 14 and a lower beam 19. The upper beam 14 has corner fittings 11 at its four corners for connection with the front-end lifting device. A corrugated plate 12 is bolted to the upper surface of the upper beam 14. The lower beam 19 is equipped with a generator 13, a transformer 15, a battery 16, a charging control cabinet 17, and a rectifier control cabinet 18. The generator 13 is electrically connected to the rectifier control cabinet 18, the rectifier control cabinet 18 is electrically connected to the transformer 15, the transformer 15 is electrically connected to the charging control cabinet 17, and the charging control cabinet 17 is electrically connected to the battery 16. Lifting lugs 110 are welded to the four corners below the lower beam 19. The telescopic mechanism 2 mainly includes a main beam 23 and a secondary beam 21. The main beam 23... The main beam 23 is equipped with a mounting base 212 and connected to the lifting lug 110 via a shaft pin. A mounting plate 22 is also provided on the main beam 23. A junction box 24 is located in the middle of the main beam 23. Adjustable upper guide devices 25, secondary upper guide devices 26, lower guide devices 27, and secondary lower guide devices 28 are fixed to both ends of the main beam 23 by bolts. A secondary beam 21 is inserted into the main beam 23 from its end. A guide rail 210 and a rack 211 are fixedly connected to the upper part of the secondary beam 21. Hook plates 29 are provided on both sides of the main beam 23 and the secondary beam 21. The power unit 3 is fixed to the mounting plate 22 of the main beam 23 by bolts. A gear 32 is provided on the power unit 3. The gear 32 is fixed to the main beam 23 via a gear seat 33. The gear 32 meshes with the rack 211. A gear cover 31 is fixed above the gear 32. An electromagnet 4 is connected to the hook plate 29 via a chain.

[0030] In a specific embodiment of this utility model, the frame beam 1 is a square frame structure made of rectangular tubes. The frame beam 1 mainly includes an upper beam 14 and a lower beam 19. The generator 13, transformer 15, battery 16, charging control cabinet 17 and rectifier control cabinet 18 are located between the upper beam 14 and the lower beam 19, and are located directly below the corrugated plate 12.

[0031] In one specific embodiment of this utility model, the generator 13 is a diesel generator.

[0032] In one specific embodiment of this utility model, a cable tray is provided on the lower beam 19, and the cable is routed through the cable tray. The rectifier control cabinet 18 supplies power to the electromagnet 4 and the power unit 3 through the junction box 24.

[0033] In one specific embodiment of this utility model, the power unit 3 mainly includes a motor and a reducer. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the gear 32 by a key. The power unit 3 is driven by the gear 32 meshing with the rack 211.

[0034] In one specific embodiment of this utility model, the secondary beam 21 is inserted into the main beam 23 from the end. The secondary beam 21 is guided by rollers of the upper guide device 25, the secondary upper guide device 26, the lower guide device 27 and the secondary lower guide device 28. The secondary beam 21 can slide within the main beam 23 to extend and retract.

[0035] In a specific embodiment of this utility model, the secondary beam 21 is provided with two parallel guide rails 210. The inner side of the rollers on the upper guide device 25 and the secondary upper guide device 26 has a protruding rim that fits into the inner side of the two guide rails 210. The rollers on the upper guide device 25 and the secondary upper guide device 26 roll between the two guide rails 210. The rack 211 is located between the two guide rails 210 and meshes with the gear 32. The power unit 3 provides power to the extension and retraction of the secondary beam 21 through the meshing of the gear 32 and the rack 211.

[0036] The working principle of this electromagnetic lifting device is as follows: During material loading and unloading, the three-phase AC power generated by the generator is stepped down to 220V DC voltage by the rectifier control cabinet and transformer, providing power to the electromagnet and power unit. In case of generator failure or lack of oil, the battery is activated to ensure normal power supply to the electromagnetic lifting device. The control section uses a PLC as the control unit; when the DC power is fed in the forward direction, the electromagnet attracts material; when the DC power is fed in the reverse direction, the electromagnet unloads material. When lifting long profiles, if... Figure 5As shown, the control system controls the motor in the power unit to rotate forward, driving the gears to rotate. The gears on the main beam and the racks on the secondary beams provide transmission. The secondary beams, inserted into the main beam at their ends, can slide and extend within the main beam. This extension causes the electromagnets positioned below them to move away from each other. At this time, the center distance between the outer electromagnets increases, and the distance between the magnetic attraction points increases. When hoisting short profiles, such as... Figure 6 As shown, the control system controls the motor in the power unit to reverse and drive the gear to rotate. The gear on the main beam and the rack on the secondary beam are driven by the gear. The secondary beam, which is inserted into the main beam from the end, can slide and retract within the main beam. The retraction causes the electromagnets arranged below it to approach each other. At this time, the center distance of the outer electromagnets becomes shorter, and the distance between the magnetic attraction points becomes shorter.

[0037] In summary, this application can solve the problems of frequent switching of lifting devices, complex operation procedures, low work efficiency, and high procurement and maintenance costs of existing electromagnetic lifting devices in the handling of steel plates and profiles with large length variations.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic lifting device with a telescopic mechanism for front-end lifting, characterized in that, The system includes a frame beam (1), the lower end of which is connected to a telescopic device (2). The telescopic device (2) includes a main beam (23), and each end of the main beam (23) is connected to a telescopic secondary beam (21). A rack (211) is fixedly connected to the middle of the upper end face of the secondary beam (21). A power unit (3) is fixed to the mounting plate (22) of the main beam (23) by bolts. The power unit (3) includes a motor and a reducer. The output shaft of the motor is connected to the input shaft of the reducer. The output shaft of the reducer is connected to a gear (32) by a key. The gear (32) meshes with the rack (211). Hook plates (29) are fixedly connected to both sides of the main beam (23) and the outer side of the secondary beam (21). An electromagnet (4) is hooked to the hook plate (29) by a chain.

2. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 1, characterized in that, The frame beam (1) is a square frame structure. The frame beam (1) includes an upper beam (14). The lower end of the upper beam (14) is connected to a lower beam (19). The upper surface of the upper beam (14) is provided with a corrugated plate (12). The four corners of the upper end of the upper beam (14) are provided with corner pieces (11) for connecting the front hanger. The four corners of the lower beam (19) are provided with lifting lugs (110) for connecting the main beam (23).

3. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 2, characterized in that, A generator (13), a transformer (15), a battery (16), a charging control cabinet (17), and a rectifier control cabinet (18) are provided between the upper beam (14) and the lower beam (19). The generator (13) is electrically connected to the rectifier control cabinet (18), the rectifier control cabinet (18) is electrically connected to the transformer (15), the transformer (15) is electrically connected to the charging control cabinet (17), and the charging control cabinet (17) is electrically connected to the battery (16).

4. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 3, characterized in that, The main beam (23) has mounting seats (212) at both ends. The mounting seats (212) are connected to the lifting lugs (110) by axle pins. The main beam (23) has a junction box (24) in the middle of the front side. The rectifier control cabinet (18) is electrically connected to the electromagnet (4) and the motor through the junction box (24) and cables.

5. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 1, characterized in that, The upper end face of the secondary beam (21) is also fixedly connected to two guide rails (210), which are symmetrically distributed on both sides of the rack (211).

6. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 5, characterized in that, The left and right ends of the main beam (23) are each fixed with an upper guide device (25), a secondary upper guide device (26), a lower guide device (27) and a secondary lower guide device (28) by bolts. Each of the upper guide device (25), the secondary upper guide device (26), the lower guide device (27) and the secondary lower guide device (28) includes a roller.

7. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 6, characterized in that, The secondary beam (21) is rolled between the roller of the upper guide device (25) and the roller of the lower guide device (28). The secondary beam (21) is rolled between the roller of the upper guide device (26) and the roller of the lower guide device (27). The inner side of the rollers on the upper guide device (25) and the upper guide device (26) is provided with a protruding rim, which is locked inside the guide rail (210).

8. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 1, characterized in that, The gear (32) is fixed on the main beam (23) by a gear seat (33), and the gear (32) is set inside the gear cover (31).

9. An electromagnetic lifting device with a telescopic mechanism for front-end lifting according to claim 3, characterized in that, The generator (13) is a diesel generator.

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