A maintenance platform for conveniently dismounting and carrying a frequency converter

Abstract

A maintenance platform for convenient disassembly, assembly, and transport of frequency converters, belonging to the field of electrical maintenance equipment technology, is used for disassembling, assembling, and transporting frequency converters. The technical solution is as follows: a lifting platform is mounted on a traveling trolley. The lifting platform consists of telescopic frames and an upper surface. The lower ends of the two telescopic frames are connected to the upper surface of the traveling trolley, and the upper ends of the two telescopic frames are connected to the lower surface of the upper surface. Two parallel slide rails are installed on the upper surface of the lifting platform. Rotating wheels are located on both sides of the lower end of the slide rails, respectively, and are fitted between the two slide rails. The rotating wheels and slide rails are in rotatable engagement. Clamping arms are located on both sides of the upper end of the slide rails. The lower end of the frequency converter is placed at the front of the slide rails, and the clamping arms on both sides of the slide rails clamp the sides of the frequency converter. This utility model can adapt to different working conditions, reduce the labor intensity of workers, effectively improve the efficiency of frequency converter disassembly, assembly, and transport, and facilitate the disassembly, assembly, and transport of frequency converters at different installation heights.

Description

Technical Field

[0001] This utility model relates to a maintenance platform for disassembling, assembling, and transporting frequency converters, belonging to the field of electrical maintenance equipment technology. Background Technology

[0002] A frequency converter (VFD) is a power control device that uses frequency conversion technology and microelectronics to control AC motors and other electrical equipment by changing the frequency of the power supply to the motor. A VFD mainly consists of a rectification unit (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, and a microprocessor unit. The VFD adjusts the voltage and frequency of the output power supply by switching its internal IGBTs, providing the required power voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, the VFD has many protection functions, such as overcurrent, overvoltage, and overload protection.

[0003] With the continuous improvement of industrial automation, frequency converters have been widely used. This has led to a significant increase in frequency converter maintenance and repair work. Currently, most industrial-grade frequency converters weigh over 100kg and are installed in electrical cabinets. There is currently no dedicated platform for disassembling and assembling frequency converters that can move, lift, and extend to adapt to different operating conditions. This makes it difficult for frontline workers to efficiently disassemble, assemble, and move frequency converters, impacting maintenance efficiency and necessitating a solution. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a maintenance platform that facilitates the disassembly, assembly, and transportation of frequency converters. This maintenance platform has functions such as walking, lifting, and telescopic, and can adapt to different working conditions of frequency converter disassembly and assembly. It can effectively save labor costs and improve the efficiency of frequency converter disassembly, assembly, and transportation.

[0005] The technical solution to the above technical problem is: A maintenance platform for easy disassembly, assembly, and transport of frequency converters includes a traveling trolley, a lifting platform, slide rails, a pulley, and clamping arms. The lifting platform is mounted on the traveling trolley and consists of telescopic frames and a top surface. The lower ends of the two telescopic frames are connected to the top surface of the traveling trolley, and the upper ends of the two telescopic frames are connected to the lower surface of the top surface. Two parallel slide rails are installed on the top surface of the lifting platform. The pulley has rotating wheels on both sides of its lower end, which are embedded in the middle of the two slide rails. The rotating wheels of the pulley are in rotational engagement with the slide rails. The pulley has clamping arms on both sides of its upper end. The lower end of the frequency converter is placed at the front of the pulley, and the clamping arms on both sides of the pulley clamp the two sides of the frequency converter.

[0006] The aforementioned maintenance platform for easy disassembly, assembly, and transport of frequency converters consists of a base plate, a fixed frame, wheels, a handrail, and a counterweight. The base plate is a rectangular plate, the fixed frame is a square tube, and two fixed frames are welded to both sides of the surface of the base plate. Four wheels are installed at the four corners of the lower surface of the base plate, the handrail is fixed to the rear end of the base plate, and the counterweight is placed on the rear of the upper surface of the base plate.

[0007] The aforementioned maintenance platform, which facilitates the disassembly, assembly, and transport of frequency converters, includes two telescopic frames on the lifting platform, each comprising a lower outer connecting rod, a lower inner connecting rod, an upper outer connecting rod, and an upper inner connecting rod. Each of these connecting rods has pin holes at its middle and both ends. The front sides of the base plate of the traveling trolley have lower connecting plates with through holes. The two fixed frames of the traveling trolley have multiple transverse through holes arranged sequentially along the length direction. Two vertical upper connecting plates are welded to the lower edges of both sides of the upper plane of the lifting platform. These upper connecting plates have multiple through holes arranged along the length direction on their surfaces. The lower ends of the lower outer connecting rods of the telescopic frame are rotatably connected to the through holes of the lower connecting plate at the front end of the bottom plate of the traveling trolley via pins. The lower inner connecting rods of the two telescopic frames are rotatably connected to the through holes of the fixed frame via pins. The middle parts of the two lower outer connecting rods and the lower inner connecting rods are rotatably connected by pins. The upper ends of the two lower outer connecting rods and the lower inner connecting rods are respectively connected to the lower ends of the two upper inner connecting rods and the upper outer connecting rods via pins. The middle parts of the two upper outer connecting rods and the upper inner connecting rods are rotatably connected by pins. The upper ends of the two upper inner connecting rods and the upper outer connecting rods are respectively rotatably connected to the through holes of the upper connecting plate on the lower surface of the upper plane of the lifting platform.

[0008] The aforementioned maintenance platform, which facilitates the disassembly, assembly, and transport of frequency converters, features a square tube slide rail with an open inner wall. Rotating wheels at both ends of the slide rail are embedded in these openings. Connecting plates with round holes are welded to the outer sides of both ends of the slide rail's bottom surface. Slide rail fixing screws are welded to both sides of the upper surface of the lifting platform. The round holes of the connecting plates on the outer sides of the two slide rails are fitted onto the fixing screws. Nuts are locked to the fixing screws above the connecting plates. The front end of the slide rail extends beyond the front end of the lifting platform, with the extension length matching the thickness of the frequency converter.

[0009] The aforementioned maintenance platform for facilitating the disassembly, assembly, and transport of frequency converters comprises a trolley consisting of a base beam, shafts, rotating wheels, columns, diagonal support rods, and crossbars. The two base beams are placed parallel to each other, with two shafts located below them. The two shafts are welded to the middle and rear ends of the lower surface of the base beams, respectively. Rotating wheels are installed at both ends of the two shafts, with the wheels rotating in conjunction with the shafts. Two columns are vertically welded to the middle of the upper surface of the two base beams. Two diagonal support rods are welded between the base beams and the columns. The upper parts of the two columns are connected by crossbars, and the upper ends of the two columns are connected to clamping arms. The length of the base beam at the front of the columns matches the thickness of the frequency converter, and the frequency converter is placed on the upper surface of the base beam in front of the columns.

[0010] The aforementioned maintenance platform, which facilitates the disassembly, assembly, and transport of frequency converters, comprises two clamping arms, each consisting of an outer sleeve, a moving screw, a rotating nut, a ring handle, a sliding tube, and a clamping plate. The outer sleeves are square tubes, welded to the upper ends of the two side columns of the trolley. The length of the two outer sleeves is perpendicular to the length of the trolley. The rear ends of the two outer sleeves are closed by a top plate with a through hole in its center. The moving screw passes through this through hole. A rotating nut on the outside of the top plate is threadedly connected to the outer end of the moving screw. The end is welded with a ring handle, and the inner end face of the rotating nut is tightly connected to the outer surface of the top plate. The other end of the moving screw is welded to the rear end of the sliding tube in the inner cavity of the outer sleeve. The sliding tube is a square tube, and the outer wall of the sliding tube and the inner wall of the outer sleeve are in sliding fit. The front end of the sliding tube extends out of the front end of the outer sleeve. The clamping plate is a flat plate, and the front ends of the two sliding tubes are respectively welded perpendicularly to the rear of the two clamping plates. The two clamping plates are located above the front of the bottom beam of the trolley, and the two clamping plates are respectively clamped on both sides of the frequency converter placed on the bottom beam of the trolley.

[0011] The beneficial effects of this utility model are: The trolley of this invention is movable by wheels, allowing it to transport the frequency converter for easy disassembly and maintenance. The telescopic frame of the lifting platform consists of hinged connecting rods, which can move the upper surface of the lifting platform up and down, thereby moving the frequency converter up and down. A slide rail is installed on the upper surface of the lifting platform, and a trolley can move back and forth along the slide rail. The frequency converter is placed on the trolley and can move back and forth along the slide rail. The rotating wheel of the trolley rotates in coordination with the slide rail, allowing it to move back and forth along the slide rail. The frequency converter is placed on the front part of the upper surface of the bottom beam of the trolley and can be sent into and taken out of the electrical cabinet via the trolley. Clamping arms are installed on the upper end of the column of the trolley, and the two clamping arms can clamp the two sides of the frequency converter to prevent it from tilting.

[0012] This utility model has a simple structure, is easy to use and maintain, and has functions such as walking, lifting and telescopic. It can adapt to different working conditions of inverter disassembly and assembly, effectively save labor costs, and improve the efficiency of inverter disassembly, assembly and transportation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram of the traveling trolley and the lifting platform; Figure 3 This is a schematic diagram of the slide structure; Figure 4 This is a schematic diagram of the pulley and clamping arm. Figure 5 This is a schematic diagram illustrating the use of this utility model.

[0014] The following components are marked in the diagram: 1. Traveling trolley; 2. Lifting platform; 3. Slide rail; 4. Trolley; 5. Clamping arm; 6. Base plate; 7. Fixed frame; 8. Wheel; 9. Handrail; 10. Counterweight; 11. Telescopic frame; 12. Upper plane; 13. Lower outer connecting rod; 14. Lower inner connecting rod; 15. Upper outer connecting rod; 16. Through hole; 17. Lower connecting plate; 18. Upper connecting plate; 19. Pin; 20. Connecting piece; 21. Slide rail fixing screw; 22. Bottom beam; 23. Shaft; 24. Rotating wheel; 25. Column; 26. Diagonal support rod; 27. Crossbar; 28. Outer sleeve; 29. ​​Moving screw; 30. Rotating nut; 31. Ring handle; 32. Sliding tube; 33. Clamping plate; 34. Frequency converter; 35. Electrical cabinet; 36. Detailed Implementation

[0015] This utility model consists of a traveling trolley 1, a lifting platform 2, a slide rail 3, a trolley 4, and a clamping arm 5.

[0016] Figure 1 The display shows that the lifting platform 2 is fixed on the traveling trolley 1, which can drive the lifting platform 2 to move. Two parallel slide rails 3 are installed on the upper surface of the lifting platform 2. Rotating wheels 23 are located on both sides of the lower end of the trolley 4, respectively, and are embedded in the two slide rails 3. The rotating wheels 23 of the trolley 4 can move back and forth along the slide rails 3, driving the trolley 4 to move. Clamping arms 5 are located on both sides of the upper end of the trolley 4. The lower end of the frequency converter 35 is placed at the front of the trolley 4, and the clamping arms 5 on both sides of the trolley 4 clamp the frequency converter 35. When the trolley 4 moves, it can send the frequency converter 35 into or out of the electrical cabinet 36.

[0017] Figure 2The trolley 1 consists of a base plate 6, a fixed frame 7, wheels 8, a handrail 9, and a counterweight 10. The base plate 6 is a rectangular plate, and the fixed frame 7 is a square tube. Two fixed frames 7 are welded to both sides of the surface of the base plate 6. Four wheels 8 are installed at the four corners of the lower surface of the base plate 6. The handrail 9 is fixed to the rear end of the base plate 6, and the counterweight 10 is placed on the rear of the upper surface of the base plate 6. The trolley 1 can move via the wheels 8. The fixed frame 7 is used to fix and install the lifting platform 2. The handrail 9 is used to push the trolley 1 to move. The counterweight 10 is used to balance the inverter 33 during transport, preventing it from tipping over due to its weight.

[0018] Figure 2 The lifting platform 2 consists of telescopic frames 11 and an upper plane 12. The lower ends of the two telescopic frames 11 are connected to the upper surface of the traveling trolley 1, and the upper ends of the two telescopic frames 11 are connected to the lower surface of the upper plane 12. Each of the two telescopic frames 11 of the lifting platform 2 consists of a lower outer connecting rod 13, a lower inner connecting rod 14, an upper outer connecting rod 15, an upper inner connecting rod 16, and a pin 19. The lower outer connecting rod 13, the lower inner connecting rod 14, the upper outer connecting rod 15, and the upper inner connecting rod 16 each have pin holes 17 at their middle and both ends for hinged connection.

[0019] Figure 2 As shown, the bottom plate 6 of the traveling trolley 1 has lower connecting plates 18 on both sides of its front end. The lower connecting plates 18 have through holes. The two fixed frames 7 of the traveling trolley 1 have multiple transverse through holes arranged sequentially along the length direction. The lower surface edges of the upper plane of the lifting platform 2 are welded with two vertical upper connecting plates 19. The upper connecting plates 19 have multiple through holes along the length direction. The two ends of the two telescopic frames 11 are connected to the lower connecting plates 18, the fixed frames 7 and the through holes of the upper connecting plates 19 through pins 20.

[0020] Figure 2 The lower ends of the lower outer connecting rods 13 of the two telescopic frames 11 are rotatably connected to the through holes of the lower connecting plate 18 at the front end of the base plate 6 of the traveling trolley 1 via pins 20. The lower inner connecting rods 14 of the two telescopic frames 11 are rotatably connected to the through holes of the fixed frame 7 via pins 20. The middle parts of the two lower outer connecting rods 13 and the lower inner connecting rods 14 are rotatably connected by pins 20. The upper ends of the two lower outer connecting rods 13 and the lower inner connecting rods 14 are connected to the lower ends of the two upper inner connecting rods 16 and the upper outer connecting rods 15 via pins 20. The middle parts of the two upper outer connecting rods 15 and the upper inner connecting rods 16 are rotatably connected by pins 20. The upper ends of the two upper inner connecting rods 16 and the upper outer connecting rods 15 are rotatably connected to the through holes of the upper connecting plate 19 on the lower surface of the upper plane 12 of the lifting platform 2.

[0021] With this structure, different through holes in the length direction can be selected in actual use. The lower inner connecting rod 14 and the upper inner connecting rod 16 can be moved to adjust the distance between the lower outer connecting rod 13 and the lower inner connecting rod 14, and the upper outer connecting rod 15 and the upper inner connecting rod 16, so that the telescopic frame 11 can be extended and retracted to adjust the height of the lifting platform 2.

[0022] Figure 3 The slide rail 3 is a square tube with an open inner wall. The rotating wheels 25 at both ends of the trolley 4 are respectively embedded in the openings in the inner wall of the square tube of the slide rail 3, allowing the rotating wheels 25 to move along the square tube of the slide rail 3. Connecting pieces 21 are welded to the outer sides of both ends of the slide rail 3, and the connecting pieces 21 have round holes. Slide rail fixing screws 22 are welded to both sides of the surface of the upper plane 12 of the lifting platform 2. The round holes of the connecting pieces 21 on the outer sides of the two slide rails 3 are respectively fitted onto the slide rail fixing screws 22. Nuts are locked to the slide rail fixing screws 22 above the connecting pieces 21, fixing the slide rail 3 to the surface of the upper plane 12 of the lifting platform 2.

[0023] Figure 3 The slide rail 3 extends beyond the front end of the lifting platform 2, so that the trolley 4 can move along the slide rail 3 to the front of the lifting platform 2. The length of the slide rail 3 extending beyond the lifting platform 2 matches the thickness of the inverter 35. After the trolley 4 moves to the front of the lifting platform 2, it can be inserted into the electrical cabinet 36 to remove the disassembled inverter 35 or place the repaired inverter 35 into the electrical cabinet 36.

[0024] Figure 4 The pulley 4 is shown to consist of a base beam 23, axle 24, rotating wheels 25, column 26, diagonal support rod 27, and crossbar 28. The base beam 23, column 26, diagonal support rod 27, and crossbar 28 of the pulley 4 are all square tubes, while the axle 24 is a round tube. The two base beams 23 of the pulley 4 are placed parallel to each other, and the two axles 24 are located below the base beams 23. The two axles 24 are welded to the middle and rear ends of the lower surface of the base beams 23, respectively. Rotating wheels 25 are installed at both ends of the two axles 24, and the rotating wheels 25 are in a rotating fit with the axles 24. The rotating wheels 25 can use bearings directly, or steel rings can be fitted over the bearings. Two columns 26 are vertically welded to the middle of the upper surface of two bottom beams 23. Two diagonal support rods 27 are welded between the bottom beams 23 and the columns 25. The upper parts of the two columns 26 are welded together by crossbars 28. The upper ends of the two columns 26 are respectively connected to the clamping arms 5. The length of the bottom beam 23 in front of the columns 26 matches the thickness of the frequency converter 35. The frequency converter 35 is placed on the upper surface of the bottom beam 23 in front of the columns 26.

[0025] Figure 4The two clamping arms 5 are respectively composed of an outer sleeve 29, a moving screw 30, a rotating nut 31, a ring handle 32, a sliding tube 33, and a clamping plate 34. The two outer sleeves 29 are welded to the upper ends of the two side columns 26 of the pulley 4, and the length direction of the two outer sleeves 29 is perpendicular to the length direction of the pulley 4. Both the outer sleeve 29 and the sliding tube 33 are square tubes. The outer sleeve 29 is fitted over the sliding tube 33, and the outer wall of the sliding tube 33 is in sliding fit with the inner wall of the outer sleeve 29. The front end of the sliding tube 33 extends beyond the front end of the outer sleeve 29 and connects to the clamping plate 34.

[0026] Figure 4 The rear ends of the two outer tubes 29 are closed by a top plate. The top plate has a through hole in its center, through which a movable screw 30 passes. A rotating nut 31 is threadedly connected to the outer end of the movable screw 30 on the outside of the top plate. An annular handle 32 is welded to the outer end of the rotating nut 31, and the inner end face of the rotating nut 31 is tightly connected to the outer surface of the top plate. The other end of the movable screw 30 is welded to the rear end of the sliding tube 33 within the inner cavity of the outer tube 29. In use, rotating the annular handle 32 causes the rotating nut 31 to rotate. The front end face of the rotating nut 31 presses against the top plate at the rear end of the outer tube 29, and the thread of the rotating nut 31 pulls the movable screw 30, which in turn moves the sliding tube 33.

[0027] Figure 4 The clamping plate 34 is a flat plate. The front ends of the two sliding tubes 33 are vertically welded to the rear of the two clamping plates 34. The two clamping plates 34 are located above the front of the bottom beam 23 of the trolley 4, and clamp the inverter 35 placed on both sides of the bottom beam 23 of the trolley 4. When the moving screw 30 moves the sliding tubes 33, the two clamping plates 34 will simultaneously close towards the middle to clamp the inverter 35, or simultaneously separate to the sides to release the inverter 35, thus assisting in the disassembly and transportation of the inverter 35.

[0028] The usage process of this utility model is as follows: First, the maintenance personnel push the trolley 1 to the front of the inverter 35 in the electrical cabinet 36 by using the handrail, and manually push the telescopic frame 11 of the lifting platform 2 to move it up and down, adjusting the height of the upper plane 12 of the lifting platform 2 so that the upper surface of the bottom beam 23 of the trolley 4 is level with the lower surface of the inverter 35. Then, the connecting rod pin holes at both ends of the telescopic frame 11 are inserted into the corresponding through holes of the fixed frame 7 and the upper connecting plate 19, respectively, so that the two ends of the telescopic frame 11 are fixedly connected to the fixed frame 7 of the trolley 1 and the upper connecting plate 19 of the lifting platform 2, and the height of the telescopic frame 11 is positioned. The maintenance personnel pushed the trolley 4 forward along the slide rail 3, extending the bottom beam 23 of the trolley 4 under the bottom surface of the inverter 35, so that the upper surface of the bottom beam 23 of the trolley 4 is in contact with the lower bottom surface of the inverter 35. Rotate the ring handle 32 at the rear of the two clamping arms 5. The ring handle 32 drives the rotating nut 31 to rotate. The rotating nut 31 can pull the moving screw 30 to move. The sliding tube 33 at the front end of the moving screw 30 drives the clamping plate 34 to move together, so that the two clamping arms 5 clamp the inverter 35 from both sides. Finally, the inverter 35 is disassembled. The bottom surface of the inverter 35 falls onto the upper surface of the bottom beam 23 of the trolley 4. The trolley 4 is manually pushed backward, and the trolley 4 can move the inverter 35 out of the electrical cabinet 36. The maintenance personnel pushed the mobile trolley 1 to transport the inverter 35 to the maintenance location; The steps for installing inverter 35 are the reverse of the steps for removing inverter 35.

[0029] An embodiment of this utility model is as follows: The base plate 6 of the traveling trolley 1 is 1120mm long and 500mm wide. The fixed frame 7 is a 40x40x4 square tube with a length of 950mm. The wheel 8 has a diameter of 50mm. The handrail 9 is made of 15mm diameter round steel with a length of 800mm and a width of 500mm. The counterweight 10 is made of cast iron with a length of 300mm, a width of 300mm, and a height of 200mm. The upper plane 12 of the telescopic frame 11 has a length of 1120mm and a width of 500mm, the connecting plate 19 has a length of 1120mm and a width of 60mm, the through hole 17 has a diameter of 15mm, and the pin 20 has a diameter of 14mm and a length of 60mm. The lower outer connecting rod 13, lower inner connecting rod 14, upper outer connecting rod 15, and upper inner connecting rod of the telescopic frame 11 are all made of 1640x40x4 square steel pipes with a length of 640mm. Slide 3 is made of 10mm steel plate with a cross-sectional dimension of 60mm in length and 30mm in width; The connecting piece 21 on the outer side of the slide 3 is made of 10mm steel plate, with a length of 50mm and a width of 50mm. The specification of the slide rail fixing screw 22 is M16x100; The bottom beam 23, column 26, diagonal support rod 27, and crossbar 28 of the trolley 4 are welded from 30x30x3 square tubes. The length of the bottom beam 23 is 1400mm, the length of the column 26 is 500mm, the length of the diagonal support rod 27 is 350mm, and the length of the crossbar 28 is 400mm. The axle 24 of the trolley 4 is made of No. 45 steel, with a diameter of 25mm and a length of 440mm; The rotating wheel 25 of the trolley 4 uses a deep groove ball bearing with an inner diameter of 25mm, an outer diameter of 47mm, and a height of 12mm. The outer sleeve 29 of the clamping arm 5 is made of 30x30x3 square tube with a length of 80mm. The diameter of the moving screw 30 is M12 and the length is 150mm. The specification of the rotating nut 31 is M12. The clamping plate 34 is made of 3mm steel plate with a length of 170mm and a width of 150mm.

Claims

1. A maintenance platform for convenient disassembly, assembly, and transport of frequency converters, characterized in that: It includes a traveling trolley (1), a lifting platform (2), a slide rail (3), a trolley (4), and a clamping arm (5). The lifting platform (2) is installed on the traveling trolley (1). The lifting platform (2) consists of a telescopic frame (11) and an upper surface (12). The lower ends of the two telescopic frames (11) are connected to the upper surface of the traveling trolley (1), and the upper ends of the two telescopic frames (11) are connected to the lower surface of the upper surface (12). The upper surface (12) of the lifting platform (2) is mounted on... The trolley (4) is equipped with two parallel slides (3). There are rotating wheels (25) on both sides of the lower end of the trolley (4). The rotating wheels (25) on both sides of the lower end of the trolley (4) are respectively embedded in the middle of the two slides (3). The rotating wheels (25) of the trolley (4) are in rotational cooperation with the slides (3). There are clamping arms (5) on both sides of the upper end of the trolley (4). The lower end of the inverter (35) is placed in front of the trolley (4). The clamping arms (5) on both sides of the trolley (4) are clamped on both sides of the inverter (35).

2. The maintenance platform for convenient disassembly, assembly, and transportation of frequency converters according to claim 1, characterized in that: The walking trolley (1) consists of a base plate (6), a fixed frame (7), wheels (8), a handrail (9), and a counterweight (10). The base plate (6) is a rectangular plate, the fixed frame (7) is a square tube, and the two fixed frames (7) are welded to both sides of the surface of the base plate (6). The four wheels (8) are installed at the four corners of the lower surface of the base plate (6). The handrail (9) is fixed to the rear end of the base plate (6), and the counterweight (10) is placed on the rear part of the upper surface of the base plate (6).

3. The maintenance platform for convenient disassembly, assembly, and transportation of frequency converters according to claim 2, characterized in that: The two telescopic frames (11) of the lifting platform (2) include a lower outer connecting rod (13), a lower inner connecting rod (14), an upper outer connecting rod (15), and an upper inner connecting rod (16). The lower outer connecting rod (13), the lower inner connecting rod (14), the upper outer connecting rod (15), and the upper inner connecting rod (16) have pin holes at the middle and both ends. The bottom plate (6) of the traveling trolley (1) has vertical lower connecting plates (18) on both sides of the front end. The lower connecting plates (18) have through holes. The two fixed frames (7) of the traveling trolley (1) have multiple transverse through holes (17) arranged sequentially along the length direction. The lower surface edges of the upper plane (12) of the lifting platform (2) are welded with two vertical upper connecting plates (19). The upper connecting plates (19) have multiple through holes (17) along the length direction on their surfaces. The lower outer connecting rods of the two telescopic frames (11) The lower ends of (13) are respectively rotatably connected to the through holes of the lower connecting plate (18) at the front end of the base plate (6) of the traveling trolley (1) via pins (20). The lower inner connecting rods (14) of the two telescopic frames (11) are respectively rotatably connected to the through holes (17) of the fixed frame (7) via pins. The middle parts of the two lower outer connecting rods (13) and the lower inner connecting rods (14) are rotatably connected by pins. The upper end of the side link (14) is connected to the lower ends of the two upper inner link (16) and the upper outer link (15) by a pin. The middle parts of the two upper outer link (15) and the upper inner link (16) are rotatably connected by a pin. The upper ends of the two upper inner link (16) and the upper outer link (15) are rotatably connected to the through hole of the upper connecting plate (19) on the lower surface of the upper plane (12) of the lifting platform (2) by a pin.

4. The maintenance platform for convenient disassembly, assembly, and transportation of frequency converters according to claim 1, characterized in that: The slide (3) is a square tube with an open inner wall. The rotating wheels (25) at both ends of the trolley (4) are respectively embedded in the opening of the inner wall of the square tube of the slide (3). Connecting pieces (21) are welded to the outer sides of the bottom surface of the slide (3). The connecting pieces (21) have round holes. Slide fixing screws (22) are welded to both sides of the upper surface (12) of the lifting platform (2). The round holes of the connecting pieces (21) on the outer sides of the two slides (3) are respectively fitted onto the slide fixing screws (22). Nuts are locked to the slide fixing screws (22) above the connecting pieces (21). The front end of the slide (3) extends out of the front end of the lifting platform (2). The length of the front end of the slide (3) extending out of the lifting platform (2) matches the thickness of the frequency converter (35).

5. The maintenance platform for convenient disassembly, assembly, and transportation of frequency converters according to claim 1, characterized in that: The trolley (4) consists of a bottom beam (23), a shaft (24), a rotating wheel (25), a column (26), an inclined support rod (27), and a crossbar (28). The two bottom beams (23) of the trolley (4) are placed in parallel, and the two shafts (24) are located below the bottom beams (23). The two shafts (24) are welded to the middle and rear ends of the lower surface of the bottom beams (23), respectively. The rotating wheels (25) are installed at both ends of the two shafts (24), and the rotating wheels (25) and the shafts (24) are in rotational engagement. Two columns (26) are vertically welded to the middle of the upper surface of two bottom beams (23). Two diagonal support rods (27) are welded between the bottom beams (23) and the columns (26). The upper part of the two columns (26) is welded together by a crossbar (28). The upper ends of the two columns (26) are connected to the clamping arms (5) respectively. The length of the bottom beam (23) in front of the column (26) matches the thickness of the inverter (35). The inverter (35) is placed on the upper surface of the bottom beam (23) in front of the column (26).

6. The maintenance platform for convenient disassembly, assembly, and transportation of frequency converters according to claim 1, characterized in that: The two clamping arms (5) are respectively composed of an outer sleeve (29), a moving screw (30), a rotating nut (31), a ring handle (32), a sliding tube (33), and a clamping plate (34). The outer sleeve (29) is a square tube. The two outer sleeves (29) are respectively welded to the upper ends of the two side columns (26) of the trolley (4). The length direction of the two outer sleeves (29) is perpendicular to the length direction of the trolley (4). The rear end face of the two outer sleeves (29) is closed by a top plate. There is a through hole in the center of the top plate. The moving screw (30) passes through the through hole of the top plate. There is a rotating nut (31) on the outside of the top plate, which is threaded to the outer end of the moving screw (30). The outer end of the rotating nut (31) is welded to a ring handle (32). The inner end face of the nut (31) is tightly connected to the outer surface of the top plate. The other end of the moving screw (30) is welded to the rear end of the sliding tube (33) in the inner cavity of the outer tube (29). The sliding tube (33) is a square tube. The outer wall of the sliding tube (33) and the inner wall of the outer tube (29) are in sliding fit. The front end of the sliding tube (33) extends out of the front end of the outer tube (29). The clamping plate (34) is a flat plate. The front ends of the two sliding tubes (33) are vertically welded to the rear of the plate surface of the two clamping plates (34). The two clamping plates (34) are located above the front of the bottom beam (23) of the trolley (4). The two clamping plates (34) are clamped on both sides of the frequency converter (35) placed on the bottom beam (23) of the trolley (4).

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