Hoisting device for maintenance of frequency converter

Abstract

The utility model discloses a frequency converter maintenance hoisting device, which belongs to the technical field of hoisting equipment and comprises a first rotating rod rotatably mounted at the output end of a hydraulic telescopic rod, and two first connecting rods rotatably mounted on the outer wall of the first rotating rod. The ends, away from each other, of the two first connecting rods are rotationally connected with second connecting rods through second rotating rods, the middles of the two second connecting rods are rotationally connected through a third rotating rod, a lifting hook assembly is rotationally installed on the outer wall of the third rotating rod, and the ends, away from the second rotating rods, of the second connecting rods are connected with clamping rods. Through the arrangement of the hoisting mechanism, during hoisting, the frequency converter is hung by the lifting hook assembly, then the hydraulic prop is started for hoisting, and in the hoisting process, the third rotating rod is stressed to pull the first connecting rod and the second connecting rod to rotate, so that the two clamping rods are close to each other to clamp the two sides of the frequency converter, and the hoisting stability is improved; therefore, the frequency converter is prevented from falling off due to shaking during hoisting.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hoist device, in particular to a frequency converter maintenance hoist device, belongs to hoisting equipment technical field. BACKGROUND

[0002] The frequency converter often needs to be loaded and unloaded during the maintenance operation process. Manual carrying is the most common in this process, but manual carrying is time-consuming and laborious, and can easily cause secondary damage to the equipment. At the same time, due to the need for multiple people to carry by hand during the manual carrying process, there are safety hazards such as workers being scratched and feet being bruised.

[0003] The existing frequency converter maintenance hoist device is mostly hung up by hooks, and the hoisted frequency converter is easy to shake, which leads to the whole frequency converter tilting or even overturning.

[0004] Therefore, the utility model provides a new solution. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to solve the problems of the prior art, and provide a frequency converter maintenance hoist device.

[0006] The purpose of the utility model can be achieved by adopting the following technical scheme:

[0007] A frequency converter maintenance hoist device, comprising a trolley, a hydraulic support is installed on the top of the trolley, a hydraulic telescopic rod is installed on the output end of the hydraulic support, a hoisting mechanism is installed on the bottom of the output end of the hydraulic telescopic rod, the hoisting mechanism comprises a first rotating rod rotatably installed on the output end of the hydraulic telescopic rod, two first connecting rods are rotatably installed on the outer wall of the first rotating rod, a second connecting rod is rotatably connected to the distal end of each of the two first connecting rods through a second rotating rod, the middle parts of the two second connecting rods are rotatably connected through a third rotating rod, a hook assembly is rotatably installed on the outer wall of the third rotating rod, and a clamping rod is connected to the distal end of the second connecting rod away from the second rotating rod.

[0008] Preferably, universal wheels are installed on the bottom of the trolley, and handrails are connected to the top of the trolley.

[0009] Preferably, the output end of the hydraulic telescopic rod is fixedly connected with a lifting block, and the bottom of the lifting block is fixedly connected with a mounting plate rotatably matched with the first rotating rod.

[0010] Preferably, the hook assembly comprises a U-shaped piece and a hook rotatably connected to the bottom of the U-shaped piece, the two second connecting rods are located on the inner side of the U-shaped piece, and a rotating sleeve rotatably connected with the second rotating rod is connected to the top end of the U-shaped piece.

[0011] The bottom of the U-shaped piece is provided with a rotating hole connected with the hook.

[0012] Preferably, the clamping rods are connected with the second connecting rods by bolts.

[0013] Preferably, the clamping rods are connected with the second connecting rods by bolts.

[0014] Preferably, the clamping rods are connected with the second connecting rods by bolts.

[0015] Preferably, the clamping rods are connected with the second connecting rods by bolts.

[0016] Preferably, the clamping rods are connected with the second connecting rods by bolts.

[0017] The frequency converter maintenance lifting device has the advantages that the hydraulic support and the hydraulic telescopic rod are arranged to realize lifting and telescoping, the lifting mechanism is arranged, the frequency converter is hung by the hook assembly during lifting, then the hydraulic support is started to lift, the third rotating rod is pulled to rotate the first connecting rod and the second connecting rod during lifting, so that the two clamping rods are close to each other and clamp the two sides of the frequency converter, the stability of lifting is improved, and the frequency converter is prevented from falling due to shaking during lifting. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of a preferred embodiment according to the utility model;

[0019] Figure 2 It is a whole structure schematic view of a preferred embodiment according to the utility model;

[0020] Figure 3 It is a lifting mechanism structure schematic view of a preferred embodiment according to the utility model;

[0021] Figure 4 It is a hook assembly structure schematic view of a preferred embodiment according to the utility model;

[0022] Figure 5 It is a clamping piece structure schematic view of a preferred embodiment according to the utility model;

[0023] Figure 6 It is a trolley structure schematic view of a preferred embodiment according to the utility model.

[0024] In the diagram: 1. Trolley; 2. Hydraulic support; 3. Hydraulic telescopic rod; 4. Lifting mechanism; 5. First rotating rod; 6. First connecting rod; 7. Second rotating rod; 8. Second connecting rod; 9. Third rotating rod; 10. Hook assembly; 11. Clamping rod; 12. Caster wheel; 13. Handrail; 14. Lifting block; 15. Mounting plate; 16. U-shaped part; 17. Hook; 18. Rotating sleeve; 19. Rotating hole; 20. Top plate; 21. Bolt; 22. Clamping part; 23. Clamping plate; 24. Slide rod; 25. Spring; 26. Nut; 27. Inclined plate; 28. Rubber pad. Detailed Implementation

[0025] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0026] like Figures 1-6 As shown, the inverter maintenance hoisting device provided in this embodiment includes a trolley 1. A hydraulic support 2 is installed on the top of the trolley 1. A hydraulic telescopic rod 3 is installed at the output end of the hydraulic support 2. A hoisting mechanism 4 is installed at the bottom of the output end of the hydraulic telescopic rod 3. The hoisting mechanism 4 includes a first rotating rod 5 rotatably installed at the output end of the hydraulic telescopic rod 3. Two first connecting rods 6 are rotatably installed on the outer wall of the first rotating rod 5. The ends of the two first connecting rods 6 that are far apart from each other are rotatably connected to a second connecting rod 8 through a second rotating rod 7. The middle parts of the two second connecting rods 8 are rotatably connected through a third rotating rod 9. A hook assembly 10 is rotatably installed on the outer wall of the third rotating rod 9. A clamping rod 11 is connected to the end of the second connecting rod 8 that is far away from the second rotating rod 7. The hydraulic support 2 and hydraulic telescopic rod 3 enable lifting and telescopic movement. With the hoisting mechanism 4, the inverter is hooked by the hook assembly 10 during hoisting, and then the hydraulic support 2 is activated for lifting. During the lifting process, the third rotating rod 9 is pulled by the force to rotate the first connecting rod 6 and the second connecting rod 8, thereby bringing the two clamping rods 11 closer together and clamping the two sides of the inverter, improving the stability of the hoisting and preventing the inverter from shaking and falling during hoisting.

[0027] In this embodiment, as Figure 1 and Figure 6 As shown, the bottom of the trolley 1 is equipped with casters 12, the top of the trolley 1 is connected to a handrail 13, the output end of the hydraulic telescopic rod 3 is fixedly connected to a lifting block 14, and the bottom of the lifting block 14 is fixedly connected to a mounting plate 15 that rotatably engages with the first rotating rod 5. The casters 12 and handrail 13 facilitate the movement of the device for maintenance.

[0028] In this embodiment, as Figure 2 ,Figure 3 and Figure 4 As shown, the hook assembly 10 includes a U-shaped component 16 and a hook 17 rotatably connected to the bottom of the U-shaped component 16. Two second connecting rods 8 are located inside the U-shaped component 16. A rotating sleeve 18, rotatably connected to the second rotating rod 7, is connected to the top of the U-shaped component 16. A rotating hole 19, rotatably connected to the hook 17, is opened at the bottom of the U-shaped component 16. A top plate 20 is fixedly connected to the top of the hook 17. Through the arrangement of the U-shaped component 16 and the hook 17, the hook 17 is rotatably connected to the U-shaped component 16, thus facilitating the hoisting of frequency converters at different angles.

[0029] In this embodiment, as Figure 2 , Figure 3 and Figure 5 As shown, the clamping rod 11 is connected to the second connecting rod 8 by bolts 21. Clamping members 22 are connected to the opposite side walls of the two clamping rods 11. The clamping members 22 include clamping plates 23. Two sliding rods 24 that pass through the clamping rods 11 are fixedly connected to the back of the clamping plates 23. A spring 25 located between the clamping plates 23 and the clamping rods 11 is installed on the outer wall of the sliding rods 24. A nut 26 is threaded to one end of the sliding rods 24. Inclined plates 27 are connected to both the upper and lower ends of the clamping plates 23. A rubber pad 28 is connected to the side wall of the clamping plates 23. The bolt 21 facilitates the replacement of the clamping rod 11 to accommodate different frequency converters; the clamping part 22 prevents damage to the frequency converter and is also suitable for frequency converters where the lifting ring is not in the middle position, providing a balancing effect; the inclined plate 27 prevents the clamping plate 23 from scratching the frequency converter when lowering the lifting mechanism 4; and the rubber pad 28 provides anti-slip and protective functions.

[0030] In this embodiment, as Figures 1-6 As shown in the figure, the working process of the inverter maintenance hoisting device provided in this embodiment is as follows:

[0031] Step 1: When in use, push the trolley 1 to the inverter, activate the hydraulic support 2 and the hydraulic telescopic rod 3 to lower the hook 17 and hook the inverter;

[0032] Step 2: Then start the hydraulic support 2 for lifting. During the lifting process, the third rotating rod 9 is pulled by the force to rotate the first connecting rod 6 and the second connecting rod 8, so that the two clamping rods 11 move closer to each other and the two clamping pieces 22 clamp the two sides of the frequency converter.

[0033] Step 3: Then push the trolley 1 to the repair shop to repair the frequency converter.

[0034] The above merely illustrates the further embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled in the art can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the disclosed scope, which all belong to the protection scope of the present application.

Claims

1. A frequency converter maintenance hoisting device comprising a trolley (1), characterized in that The top of the trolley (1) is provided with a hydraulic prop (2), the output end of the hydraulic prop (2) is provided with a hydraulic telescopic rod (3), the bottom of the output end of the hydraulic telescopic rod (3) is provided with a hoisting mechanism (4), the hoisting mechanism (4) comprises a first rotating rod (5) rotatably connected to the output end of the hydraulic telescopic rod (3), two first connecting rods (6) are rotatably connected to the outer wall of the first rotating rod (5), the distal ends of the two first connecting rods (6) are rotatably connected with a second connecting rod (8) through a second rotating rod (7), the middle portions of the two second connecting rods (8) are rotatably connected through a third rotating rod (9), a hook assembly (10) is rotatably connected to the outer wall of the third rotating rod (9), and the distal ends of the second connecting rods (8) away from the second rotating rod (7) are connected with clamping rods (11).

2. The frequency converter maintenance hoisting device according to claim 1, characterized in that, The bottom of the trolley (1) is provided with a universal wheel (12), and the top of the trolley (1) is connected with a handrail (13).

3. The frequency converter maintenance hoisting device according to claim 1, characterized in that, The output end of the hydraulic telescopic rod (3) is fixedly connected with a lifting block (14), and the bottom of the lifting block (14) is fixedly connected with a mounting plate (15) rotatably connected with the first rotating rod (5).

4. The frequency converter maintenance hoist device of claim 1, wherein, The hook assembly (10) comprises a U-shaped piece (16) and a hook (17) rotatably connected to the bottom of the U-shaped piece (16), the two second connecting rods (8) are located on the inner side of the U-shaped piece (16), and the top end of the U-shaped piece (16) is connected with a rotating sleeve (18) rotatably connected with the second rotating rod (7).

5. A frequency changer maintenance hoist as claimed in claim 4, wherein, The bottom of the U-shaped piece (16) is provided with a rotating hole (19) rotatably connected with the hook (17), and the top end of the hook (17) is fixedly connected with a top plate (20).

6. The frequency converter maintenance hoist device of claim 1, wherein, The clamping rods (11) are connected with the second connecting rods (8) through bolts (21).

7. The frequency converter maintenance hoist device of claim 1, wherein, The opposite side walls of the two clamping rods (11) are connected with clamping pieces (22), and the clamping pieces (22) comprise clamping plates (23).

8. A frequency changer maintenance hoist as claimed in claim 7, characterised in that, The outer wall of the sliding rod (24) is provided with a spring (25) located between the clamping plate (23) and the clamping rod (11), and one end of the sliding rod (24) is threadedly connected with a nut (26).

9. A frequency changer maintenance hoist as claimed in claim 8, wherein, The upper and lower ends of the clamping plate (23) are connected with inclined plates (27).

10. A frequency changer maintenance hoist as claimed in claim 9, wherein, The side wall of the clamping plate (23) is connected with a rubber pad (28).

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