High-voltage frequency converter testing device

Abstract

The utility model provides a high-voltage frequency converter testing device, and belongs to the field of frequency converter testing. The technical problem to be solved is to provide a high-voltage frequency converter testing device which is convenient for carrying out limiting protection on a frequency converter mainboard. According to the technical scheme, the device comprises an operation table and a transmission device, a transmission groove is formed in the operation table, a movable block is slidably connected into the transmission groove, the transmission device penetrates through the operation table and the movable block, a first sliding groove is formed in the side wall of the transmission groove, a first sliding block is arranged on the movable block, and the first sliding groove is matched with the first sliding block; a plurality of second sliding grooves are formed in the movable block, second sliding blocks are slidably connected into the second sliding grooves, mounting blocks are fixedly connected to the second sliding blocks, a top plate is further arranged on the movable block, one end of a telescopic rod is fixedly connected to the top plate, the other end of the telescopic rod is fixedly connected to the mounting blocks, and the telescopic rod is sleeved with a spring; the utility model is applied to frequency converter testing.

Description

Technical Field

[0001] The utility model provides a high-voltage frequency converter testing device, belonging to the field of frequency converter testing. Background Art

[0002] The frequency converter can provide the required power supply voltage according to the actual needs of the motor, so as to achieve the purpose of energy saving and speed regulation. Therefore, in order to test whether the frequency converter operates stably, the resistance and voltage are detected through a test bench to check whether the frequency converter operates normally. In order to improve the testing efficiency of the frequency converter, the existing high-voltage frequency converter testing device uses mechanical transmission to replace manual work to dock the docking interface of the frequency converter main board with the testing interface. However, there is a lack of limit protection during the docking process of the two. When the mechanical transmission is overloaded, excessive extrusion between the two will cause mutual damage. Content of the Utility Model

[0003] In order to solve the technical problem that the docking interface of the frequency converter main board and the testing interface are damaged due to excessive extrusion when the mechanical transmission is overloaded, the utility model provides a high-voltage frequency converter testing device which is convenient for limiting and protecting the frequency converter main board, aiming to limit and protect the frequency converter main board by improving the hardware structure of the high-voltage frequency converter testing device.

[0004] In order to solve the above technical problem, the technical solution adopted by the utility model is: a high-voltage frequency converter testing device, including an operating table and a transmission device, one end of the operating table is fixedly connected to the test bench, and the other end of the operating table is fixedly connected to a support vertical plate;

[0005] A transmission groove is arranged on the operating table, and a movable block is slidably connected in the transmission groove;

[0006] The operating table includes a first frame and a second frame;

[0007] The transmission device sequentially penetrates through the first frame, the movable block and the second frame;

[0008] A first sliding groove is arranged on the inner side wall of the transmission groove, a first sliding block is arranged on the movable block, and the first sliding groove and the first sliding block cooperate with each other;

[0009] A plurality of second sliding grooves are arranged on the movable block, at least one second sliding block is slidably connected in each second sliding groove, and an installation block is fixedly connected to the second sliding block;

[0010] A top plate is further arranged on the movable block, one end of a telescopic rod is fixedly connected to the top plate, the other end of the telescopic rod is fixedly connected to the installation block, and a spring is sleeved on the telescopic rod.

[0011] Further, a number of positioning posts are provided on the mounting block, and the positioning posts are used to fix the frequency converter main board, and the positioning posts correspond one by one to the mounting holes on the frequency converter main board; rotating pressing cylinders are arranged on both sides of the mounting block, and the rotating pressing cylinders are electrically connected to the controller of the test bench.

[0012] Further, the transmission device includes a first rotating shaft, a second rotating shaft and a threaded tube, and a threaded column is fixedly connected between the first rotating shaft and the second rotating shaft; the first rotating shaft penetrates through the first frame, the second rotating shaft penetrates through the second frame, the threaded tube is sleeved on the movable block, and the threaded tube is threadedly connected with the threaded column; the first rotating shaft, the threaded column, the threaded tube and the second rotating shaft are coaxially arranged.

[0013] Further, one end of the first rotating shaft away from the threaded column is fixedly connected with a motor, and the motor is electrically connected to the controller of the test bench.

[0014] Further, a cushion block is arranged on the upper end surface of the second frame, and a test interface is arranged on the cushion block, and the test interface is adapted to the docking interface on the frequency converter main board.

[0015] Further, the second chutes are parallel to each other, and the second chutes are parallel to the telescopic rods.

[0016] Further, the first chute is parallel to the threaded column.

[0017] Further, the test interface is electrically connected to the test bench.

[0018] Further, the motor is placed on a mounting seat, and the mounting seat is fixedly connected to the supporting vertical plate.

[0019] Further, a number of rubber pads are arranged on the end surface of the supporting vertical plate away from the operating table.

[0020] The beneficial effects of the present utility model compared with the prior art are as follows:

[0021] 1. By arranging the second chute, the second slider, the top plate on the movable block and arranging the telescopic rod and the spring between the top plate and the mounting block, when the movable block drives the mounting block to move overload, the frequency converter main board can keep its position unchanged under the mutual cooperation of the second chute and the second slider, so that the docking interface of the frequency converter main board and the test interface will not be over-pressed. Compared with the traditional mechanical test, the high-voltage frequency converter test device of the present utility model can play a role in limiting and protecting the frequency converter main board, avoiding damage to the frequency converter main board and the test interface while improving the test efficiency, and has economy;

[0022] 2. The utility model drives the threaded column to operate by controlling the motor. Under the mutual cooperation of the threaded column and the threaded pipe, the movable block is driven to move, so that the docking interface of the frequency converter main board is electrically connected to the test interface, and the test of the frequency converter main board is completed. Compared with the traditional manual test, the labor intensity of the operator can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes the present utility model with reference to the drawings:

[0024] Figure 1 is a front perspective structural schematic diagram of the present utility model;

[0025] Figure 2 is a front perspective sectional structural schematic diagram of the present utility model;

[0026] Figure 3 is Figure 2 an enlarged structural schematic diagram of part A in

[0027] In the figure: 1, test bench; 2, operation table; 3, support vertical plate; 4, transmission groove; 5, movable block; 6, first chute; 7, first slider; 8, second chute; 9, second slider; 10, mounting block; 11, positioning column; 12, frequency converter main board; 13, rotary pressing cylinder; 14, telescopic rod; 15, spring; 16, top plate; 17, cushion block; 18, test interface; 19, mounting seat; 20, motor; 21, first rotating shaft; 22, threaded column; 23, second rotating shaft; 24, threaded pipe; 25, power plug; 26, rubber pad; 27, first frame; 28, second frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" usually refer to the directions shown in the drawings, or refer to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation words do not limit the present utility model.

[0029] As Figures 1 to 3 shown, the present utility model provides a high-voltage frequency converter test device, including an operation table 2 and a transmission device. One end of the operation table 2 is fixedly connected to the test bench 1, and the lower end surface of the other end of the operation table 2 is fixedly connected to the upper end surface of the support vertical plate 3.

[0030] A drive slot 4 is formed in the operation table 2. The drive slot 4 has a square structure. A movable block 5 is slidably connected in the drive slot 4. The drive device sequentially penetrates through the first frame 27 of the operation table 2, the movable block 5, and the second frame 28 of the operation table 2. One first chute 6 is provided on each of two non-adjacent inner sidewalls of the drive slot 4. A first slider 7 is fixedly connected to the side end face of the movable block 5. The first chute 6 and the first slider 7 cooperate with each other. The first slider 7 can slide in the first chute 6. One or more first sliders 7 can be provided.

[0031] In this embodiment, the drive device includes a first rotating shaft 21, a second rotating shaft 23, and a threaded tube 24. A threaded column 22 is fixedly connected between the first rotating shaft 21 and the second rotating shaft 23. The threaded column 22 is parallel to the first chute 6. The first rotating shaft 21 penetrates through the first frame 27 of the operation table 2. The second rotating shaft 23 penetrates through the second frame 28 of the operation table 2. The threaded tube 24 is sleeved on the movable block 5. The threaded tube 24 is threadedly connected to the threaded column 22. The first rotating shaft 21, the threaded column 22, the threaded tube 24, and the second rotating shaft 23 are coaxially arranged. The drive device can also be other structures as long as it can drive the movable block 5 to move on the operation table 2.

[0032] A plurality of second chutes 8 are formed in the movable block 5. At least one second slider 9 is slidably connected in each second chute 8. In this embodiment, one second slider 9 is slidably connected in each second chute 8. An installation block 10 is fixedly connected to the second slider 9. In this embodiment, two second chutes 8 are provided. The two second chutes 8 are respectively arranged on both sides of the upper surface of the movable block 5. The two second chutes 8 are parallel to each other. The upper surface of the second slider 9 is in the same plane as the upper surface of the movable block 5. The upper surface of the second slider 9 is fixedly connected to the lower surface of the installation block 10. The upper surface of the second slider 9 and the upper surface of the movable block 5 can also be other positional relationships. The fixed connection positional relationship between the second slider 9 and the installation block 10 can also be set as other positional relationships as long as the second slider 9 can drive the installation block 10 to slide in the second chute 8.

[0033] A top plate 16 is fixedly connected to the edge position of the upper surface of the movable block 5. One end of a telescopic rod 14 is fixedly connected to the top plate 16. The other end of the telescopic rod 14 is fixedly connected to the side end face of the installation block 10. The telescopic rod 14 is parallel to the second chute 8. A spring 15 is sleeved on the telescopic rod 14.

[0034] After the mating interface of the frequency converter main board 12 comes into contact with the test interface 18, after the spring 15 and the telescopic rod 14 contract a small distance, the mating interface of the frequency converter main board 12 and the test interface 18 complete the docking; when the movable block 5 drives the mounting block 10 to move overload, the spring 15 and the telescopic rod 14 cooperate to further contract, but the frequency converter main board 12 remains in place under the mutual cooperation of the second sliding groove 8 and the second slider 9, so that the mating interface and the test interface 18 of the frequency converter main board 12 will not be over-pressed, thus playing a role in limiting and protecting the frequency converter main board 12.

[0035] A number of positioning posts 11 are provided on the mounting block 10. The positioning posts 11 correspond one by one to the mounting holes on the frequency converter main board 12. The number of positioning posts 11 is set according to the number of mounting holes on the frequency converter main board 12. A number of rotary pressing cylinders 13 are fixedly connected to the two side faces of the mounting block 10. The frequency converter main board 12 is fixed to the mounting block 10 through the positioning posts 11 and the rotary pressing cylinders 13. In this embodiment, two groups of rotary pressing cylinders 13 are provided.

[0036] One end of the first rotating shaft 21 away from the threaded column 22 is fixedly connected to the output end of the motor 20. The motor 20 is placed on the mounting seat 19, and the mounting seat 19 is fixedly connected to the side end face of the supporting vertical plate 3. The motor 20 is a forward and reverse motor 20. The operation of the motor 20 is controlled by the controller of the test bench 1, so as to drive the first rotating shaft 21 and the threaded column 22 to rotate. Under the mutual cooperation of the threaded column 22 and the threaded tube 24, the threaded tube 24 moves along the threaded column 22. Since the threaded tube 24 is fixedly connected to the movable block 5, the frequency converter main board 12 placed on the movable block 5 moves accordingly at this time, so that the mating interface of the frequency converter main board 12 and the test interface 18 are electrically connected to complete the docking test. By using mechanical transmission to replace manual labor for the electrical performance test of the frequency converter, the labor intensity of the operator can be effectively reduced.

[0037] A cushion block 17 is provided on the upper end face of the second frame 28 of the operating table 2. A test interface 18 is provided on the cushion block 17. The test interface 18 is adapted to the mating interface on the frequency converter main board 12. The test interface 18 is electrically connected to the test bench 1 through a wire, and the test bench 1 is also electrically connected to a power plug 25.

[0038] A number of rubber pads 26 are provided on the other end face of the supporting vertical plate 3 away from the operating table 2, that is, the rubber pads 26 are fixedly connected to the lower end face of the supporting vertical plate 3 for anti-slip. In this embodiment, two groups of rubber pads 26 are provided, which are respectively arranged at two non-adjacent ends of the lower end face of the supporting vertical plate 3. The supporting vertical plate 3 in this embodiment is a square structure, and can also be set to other structures as long as it can be used to support the operating table 2.

[0039] The working principle of the present utility model is:

[0040] When using the high-voltage frequency converter test device of the present utility model to conduct electrical tests on the frequency converter, the frequency converter main board 12 is fixed to the top of the mounting block 10 through the mounting holes on the frequency converter main board 12, so that the docking interface of the frequency converter main board 12 and the test interface 18 are in the same straight line. Then, the controller of the test bench 1 is used to control the rotation and downward pressing of the air cylinder 13 to press the frequency converter main board 12 tightly. After the preparatory work is completed, the controller of the test bench 1 is used to control the operation of the motor 20, thereby driving the first rotating shaft 21 and the threaded column 22 to rotate. Under the mutual cooperation of the threaded column 22 and the threaded tube 24, the threaded tube 24 moves along the threaded column 22, and then drives the movable block 5 and the frequency converter main board 12 fixed thereon to move towards the test interface 18. When the spring 15 and the telescopic rod 14 undergo a small amount of contraction, the docking interface of the frequency converter main board 12 and the test interface 18 are docked, that is, the frequency converter test is completed. When the movable block 5 drives the mounting block 10 to move overload, under the normal state of completing the test of the frequency converter main board 12, the spring 15 and the telescopic rod 14 cooperate to further contract. However, due to the mutual cooperation of the second chute 8 and the second slider 9, the docking interface of the frequency converter main board 12 will not move further closer to the test interface 18, so that the docking interface of the frequency converter main board 12 and the test interface 18 will not be overly squeezed. After the test bench 1 reads the frequency converter main board 12, the motor 20 automatically stops operating. Then, the frequency converter main board 12 can be tested through the test bench 1. After the test is completed, the motor 20 is controlled to reverse, and the movable block 5 returns to the initial position for the next test of the frequency converter main board 12.

[0041] Regarding the specific structure of the present utility model, it should be noted that the connection relationships between the various component modules adopted by the present utility model are definite and achievable. Except for the special descriptions in the embodiments, the specific connection relationships can bring corresponding technical effects, and on the premise of not relying on the execution of corresponding software programs, the technical problems proposed by the present utility model can be solved. The models of the components, modules, and specific components, the connection methods between them, and the conventional usage methods and predictable technical effects brought by the above technical features, except for the specific descriptions, all belong to the patent, journal papers, technical manuals, technical dictionaries, and public content in textbooks that those skilled in the art can obtain before the filing date, or belong to the prior art such as the conventional technology and common general knowledge in the field, which need not be elaborated. This makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain the corresponding physical product according to this technical means.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high voltage inverter test device, characterized in that: It comprises an operating table (2) and a transmission device, wherein one end of the operating table (2) is fixedly connected to the test bench (1), and the other end of the operating table (2) is fixedly connected to the supporting vertical plate (3); The operating table (2) is provided with a transmission groove (4), and a movable block (5) is slidably connected in the transmission groove (4); The operating table (2) comprises a first frame (27) and a second frame (28); The transmission device sequentially passes through the first frame (27), the movable block (5) and the second frame (28); A first slide groove (6) is provided on the inner side wall of the transmission groove (4), and a first slide block (7) is provided on the movable block (5), and the first slide groove (6) and the first slide block (7) cooperate with each other; The movable block (5) is provided with a plurality of second slide grooves (8), each of the second slide grooves (8) has at least one second sliding block (9) slidably connected therein, and the second sliding block (9) is fixedly connected to a mounting block (10); The movable block (5) is also provided with a top plate (16), one end of a telescopic rod (14) is fixedly connected to the top plate (16), the other end of the telescopic rod (14) is fixedly connected to the mounting block (10), and a spring (15) is sleeved on the telescopic rod (14).

2. A high voltage inverter testing device according to claim 1, characterized in that: A plurality of positioning columns (11) are provided on the mounting block (10), the positioning columns (11) being used to fix the inverter mainboard (12), the positioning columns (11) corresponding one to one with the mounting holes on the inverter mainboard (12); and rotating downward-pressing cylinders (13) are provided on both sides of the mounting block (10), the rotating downward-pressing cylinders (13) being electrically connected to a controller of the test bench (1).

3. A high voltage inverter testing device according to claim 1, characterized in that: The transmission device comprises a first rotating shaft (21), a second rotating shaft (23) and a threaded tube (24); a threaded column (22) is fixedly connected between the first rotating shaft (21) and the second rotating shaft (23); the first rotating shaft (21) passes through a first frame (27); the second rotating shaft (23) passes through a second frame (28); the threaded tube (24) is inserted into the movable block (5); the threaded tube (24) is threadedly connected to the threaded column (22); the first rotating shaft (21), the threaded column (22), the threaded tube (24) and the second rotating shaft (23) are coaxially arranged.

4. A high voltage inverter testing device according to claim 3, characterized in that: One end of the first rotating shaft (21) away from the threaded column (22) is fixedly connected to a motor (20), and the motor (20) is electrically connected to a controller of the test bench (1).

5. A high voltage inverter testing device according to claim 2, characterized in that: The upper end surface of the second frame (28) is provided with a cushion block (17), and the cushion block (17) is provided with a test interface (18), and the test interface (18) is adapted to a docking interface on the inverter mainboard (12).

6. A high voltage inverter testing device according to claim 1, characterized in that: The second slide grooves (8) are parallel to each other, and the second slide grooves (8) and the telescopic rod (14) are parallel to each other.

7. A high voltage inverter testing device according to claim 3, characterized in that: The first sliding groove (6) and the threaded column (22) are parallel to each other.

8. A high voltage inverter testing device according to claim 5, characterized in that: The test interface (18) is electrically connected to the test bench (1).

9. A high voltage inverter testing device according to claim 4, characterized in that: The motor (20) is placed on a mounting seat (19), and the mounting seat (19) is fixedly connected to the supporting vertical plate (3).

10. A high voltage inverter testing device according to claim 1, characterized in that: A plurality of rubber pads (26) are provided on an end surface of the supporting upright plate (3) away from the operating table (2).

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