Auxiliary hoisting tool for frequency converter maintenance

Abstract

The utility model discloses an auxiliary hoisting tool for frequency converter maintenance, and relates to the technical field of frequency converter maintenance, the auxiliary hoisting tool comprises a connecting plate, the upper side and the lower side of the outer wall of the connecting plate are symmetrically provided with through sliding grooves in the front-back direction, and the interior of each sliding groove in the front-back direction is connected with two connecting rods in a sliding mode; the upper end of the outer wall of each connecting rod penetrates through the corresponding sliding groove and is fixedly provided with a sliding plate, the motor is started to drive the screw to rotate, the screw rotates to drive the two middle blocks to get close to each other or get away from each other at the same time, and therefore the sliding plates on the left side and the right side are driven to get close to each other or get away from each other at the same time; according to the device, the distance between the two sliding plates is changed through left-right sliding of the sliding plates on the left side and the right side, so that the distance between the two hoisting plates is changed, the distance between the hoisting column supports on the left side and the right side is adjusted, frequency converters with different widths can be clamped and hoisted through the device, and the using convenience of the device is improved.

Description

A type of auxiliary hoisting tool for inverter maintenance Technical Field

[0001] This utility model relates to the field of frequency converter maintenance technology, and in particular to an auxiliary hoisting tool for frequency converter maintenance. Background Technology

[0002] A frequency converter (VFD) is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of its power supply. 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 output voltage and frequency by switching its internal IGBTs, providing the required power voltage according to the motor's actual needs, thereby achieving energy saving and speed regulation. In addition, VFDs have many protection functions, such as overcurrent, overvoltage, and overload protection. With the continuous improvement of industrial automation, VFDs have been widely used.

[0003] When a frequency converter malfunctions, it needs to be repaired. Repairing a frequency converter often requires hoisting and transporting it. Since frequency converters are generally large and heavy, large gantry cranes are needed for hoisting. Because frequency converters have different specifications, their dimensions also vary. Therefore, targeted auxiliary clamping is required when hoisting them. However, there is currently a lack of professional auxiliary clamping tools for hoisting frequency converters, making the hoisting of frequency converters quite difficult and cumbersome.

[0004] Therefore, it is necessary to improve the existing technology to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides an auxiliary hoisting tool for inverter maintenance, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary hoisting tool for inverter maintenance, comprising a connecting plate. The outer wall of the connecting plate has symmetrical through-slide grooves on its upper and lower sides. Two connecting rods are slidably connected inside each of the front and rear slide grooves. The upper end of the outer wall of each connecting rod passes through the slide groove and is fixedly mounted with a sliding plate. A middle block is fixedly connected between each pair of sliding plates on the left and right. A hoisting plate is simultaneously fixedly mounted on the lower end of the outer wall of each pair of connecting rods on the left and right. A hoisting column that can slide up and down is provided below the outer wall of the hoisting plate. A locking block is fixedly mounted on the lower end of the outer wall of the hoisting column.

[0007] As a further technical solution of this utility model, a sliding steel ball is rotatably connected to the lower side of the outer wall of the sliding plate.

[0008] As a further technical solution of this utility model, a threaded block is fixedly installed on the upper end of the outer wall of each of the left and right intermediate blocks, and a fixing plate is symmetrically fixedly installed on the upper end of the outer wall of the connecting plate. A screw is rotatably connected between the two fixing plates, and the threads on the left and right sides of the screw are opposite and simultaneously threadedly connected to the two threaded blocks.

[0009] As a further technical solution of this utility model, a motor is fixedly installed on the upper end of the outer wall of the connecting plate, the output end of the motor passes through the fixed plate and is fixedly connected to the screw, and a counterweight is fixedly installed on the upper side of the outer wall of the connecting plate and at a position symmetrical to the motor.

[0010] As a further technical solution of this utility model, each of the left and right lifting plates has a sliding cylinder symmetrically fixedly installed on the lower part of its outer wall. The lifting column is slidably connected to the inner wall of the sliding cylinder. The sliding cylinder has a positioning hole one, and the lifting column has positioning holes two linearly arranged and fixedly installed. Positioning bolts are inserted into both the positioning hole two and the positioning hole one. Locking screws are threaded onto the positioning bolts.

[0011] As a further technical solution of this utility model, a connecting column is fixedly installed on the upper end of the outer wall of the connecting plate, and a connecting ring is fixedly installed on the upper end of the outer wall of the connecting column.

[0012] This utility model provides an auxiliary hoisting tool for inverter maintenance, which has the following advantages compared with the prior art:

[0013] 1. This utility model uses a starting motor to drive a screw to rotate. The rotation of the screw causes two intermediate blocks to move closer or further apart simultaneously, which in turn causes the sliding plates on the left and right sides to move closer or further apart simultaneously. The device changes the distance between the two sliding plates by sliding them left and right, thereby changing the spacing between the two lifting plates and adjusting the distance between the lifting column supports on the left and right sides. This allows the device to clamp and lift frequency converters of different widths, improving the convenience of use.

[0014] 2. In use, the device can change the height of the lifting column through the sliding connection between the lifting column and the sliding cylinder. The lifting column and the sliding cylinder are locked by inserting the positioning bolts into the positioning hole 2 and the positioning hole 1. This allows the device to clamp and lift frequency converters of different heights, further increasing the applicability and practicality of the device. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of this utility model;

[0016] Figure 2 is a front view of this utility model;

[0017] Figure 3 is a top view of this utility model;

[0018] Figure 4 is a structural schematic diagram of the sliding plate of this utility model;

[0019] Figure 5 is an exploded structural diagram of the hoisting column and sliding cylinder of this utility model.

[0020] In the diagram: 100, connecting plate; 110, slide groove; 120, connecting rod; 200, sliding plate; 210, intermediate block; 220, sliding steel ball; 300, threaded block; 310, fixing plate; 400, screw; 410, motor; 500, lifting plate; 510, lifting column; 520, locking block; 530, sliding cylinder; 550, positioning hole one; 551, positioning bolt; 552, locking screw; 560, positioning hole two; 600, counterweight block; 700, connecting column; 710, connecting ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4. This utility model provides a technical solution for an auxiliary hoisting tool for inverter maintenance: it includes a connecting plate 100, with symmetrical through-slots 110 on the upper and lower sides of the outer wall of the connecting plate 100. Two connecting rods 120 are slidably connected inside each of the front and rear slots 110. A sliding plate 200 is fixedly installed on the upper end of the outer wall of each connecting rod 120, passing through the slot 110. A middle block 210 is fixedly connected between each pair of sliding plates 200 on the left and right sides. A hoisting tool is simultaneously fixedly installed on the lower end of the outer wall of each pair of connecting rods 120 on the left and right sides. The mounting plate 500 has a vertically sliding lifting column 510 installed on the lower part of its outer wall. A clamping block 520 is fixedly installed at the lower end of the outer wall of the lifting column 510. The inverter is clamped and lifted by the clamping blocks 520 on the left and right sides. The device changes the distance between the two sliding plates 200 by sliding them left and right, thereby changing the distance between the two lifting plates 500 and adjusting the distance between the supports of the lifting columns 510 on the left and right sides. This allows the device to clamp and lift inverters of different widths.

[0023] A sliding steel ball 220 is rotatably connected to the lower outer wall of the sliding plate 200. The sliding steel ball 220 can reduce the friction when the sliding plate 200 slides on the connecting plate 100. A threaded block 300 is fixedly installed on the upper outer wall of each left and right intermediate block 210. A fixing plate 310 is symmetrically fixed on the upper outer wall of the connecting plate 100. A screw 400 is rotatably connected between the two fixing plates 310. The threads on the left and right sides of the screw 400 are opposite and are threadedly connected to the two threaded blocks 300 at the same time. The rotation of the screw 400 drives the two intermediate blocks 210 to move closer or further away from each other at the same time, thereby driving the sliding plates 200 on the left and right sides to move closer or further away from each other at the same time.

[0024] A motor 410 is fixedly installed on the upper part of the outer wall of the connecting plate 100. The output end of the motor 410 passes through the fixed plate 310 and is fixedly connected to the screw 400. A counterweight 600 is fixedly installed on the upper side of the outer wall of the connecting plate 100 and at a position symmetrical to the motor 410. The screw 400 is rotated by starting the motor 410. A connecting column 700 is fixedly installed on the upper part of the outer wall of the connecting plate 100. A connecting ring 710 is fixedly installed on the upper part of the outer wall of the connecting column 700. The device can be easily connected to lifting equipment such as gantry cranes through the connecting ring 710.

[0025] As shown in Figures 1, 2, and 5, each of the left and right lifting plates 500 has a sliding cylinder 530 symmetrically fixedly installed on the lower outer wall. The lifting column 510 is slidably connected to the inner wall of the sliding cylinder 530. The sliding cylinder 530 has a positioning hole 550. The lifting column 510 has a positioning hole 560 linearly arranged and fixedly installed. Positioning bolts 551 are inserted into both positioning hole 560 and positioning hole 550. Locking screws 552 are threaded onto the positioning bolts 551. The height of the lifting column 510 can be changed through the sliding connection between the lifting column 510 and the sliding cylinder 530. The lifting column 510 and the sliding cylinder 530 are locked by inserting the positioning bolts 551 into positioning hole 560 and positioning hole 550.

[0026] The working principle of this utility model is as follows: In use, the device is first connected to gantry cranes and other hoisting equipment via the connecting ring 710. The device drives the screw 400 to rotate via the starting motor 410. The rotation of the screw 400 causes the two intermediate blocks 210 to move closer or further apart, thereby causing the sliding plates 200 on the left and right sides to move closer or further apart. The device changes the distance between the two sliding plates 200 by sliding them left and right, thereby changing the distance between the two hoisting plates 500 and adjusting the distance between the hoisting column 510 brackets on the left and right sides. At the same time, the device can change the height of the hoisting column 510 through the sliding connection between the hoisting column 510 and the sliding cylinder 530, and locks the hoisting column 510 and the sliding cylinder 530 by inserting the positioning bolt 551 into the positioning hole 2 560 and the positioning hole 1 550.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A variable frequency drive (VFD) maintenance auxiliary hoisting tool, comprising a connecting plate (100), characterized in that: The connecting plate (100) has symmetrical through grooves (110) on the upper and lower sides of its outer wall. Two connecting rods (120) are slidably connected inside each groove (110). The upper end of the outer wall of each connecting rod (120) passes through the groove (110) and is fixedly installed with a sliding plate (200). A middle block (210) is fixedly connected between each pair of sliding plates (200) on the left and right. A lifting plate (500) is fixedly installed at the lower end of the outer wall of each pair of connecting rods (120) on the left and right. A lifting column (510) that can slide up and down is provided below the outer wall of the lifting plate (500). A locking block (520) is fixedly installed at the lower end of the outer wall of the lifting column (510).

2. The inverter maintenance auxiliary hoisting tool according to claim 1, characterized in that, A sliding steel ball (220) is rotatably connected to the lower side of the outer wall of the sliding plate (200).

3. The inverter maintenance auxiliary hoisting tool according to claim 1, characterized in that, A threaded block (300) is fixedly installed on the upper end of the outer wall of each of the left and right intermediate blocks (210). A fixing plate (310) is symmetrically fixed on the upper end of the outer wall of the connecting plate (100). A screw (400) is rotatably connected between the two fixing plates (310). The threads on the left and right sides of the screw (400) are opposite and are threadedly connected to the two threaded blocks (300) at the same time.

4. The inverter maintenance auxiliary hoisting tool according to claim 3, characterized in that, A motor (410) is fixedly installed on the upper end of the outer wall of the connecting plate (100). The output end of the motor (410) passes through the fixed plate (310) and is fixedly connected to the screw (400). A counterweight (600) is fixedly installed on the upper side of the outer wall of the connecting plate (100) and at a position symmetrical to the motor (410).

5. The inverter maintenance auxiliary hoisting tool according to claim 1, characterized in that, Each of the left and right lifting plates (500) has a sliding cylinder (530) symmetrically fixedly installed on the lower outer wall. The lifting column (510) is slidably connected to the inner wall of the sliding cylinder (530). The sliding cylinder (530) has a positioning hole 1 (550). The lifting column (510) has a positioning hole 2 (560) linearly arranged and fixedly installed. Positioning bolts (551) are inserted into both the positioning hole 2 (560) and the positioning hole 1 (550). Locking screws (552) are threaded onto the positioning bolts (551).

6. The inverter maintenance auxiliary hoisting tool according to claim 1, characterized in that, A connecting column (700) is fixedly installed on the upper end of the outer wall of the connecting plate (100), and a connecting ring (710) is fixedly installed on the upper end of the outer wall of the connecting column (700).

Images