Power supply module vibration / impact test tool

Abstract

The utility model discloses a power module vibration / impact test tool, and belongs to the field of power module test devices. The tool comprises a base, mounting plates, a pressing strip and a rubber mat, the base is horizontally fixed to the table top of the vibration table, a plurality of inner grooves are formed in the upper surface of the base, and the mounting plates are fixed to the upper portions of the inner grooves respectively. The center of the mounting plate is provided with an inner concave part used for horizontally placing a to-be-tested power supply module. A plurality of through avoiding holes and avoiding grooves are formed in the bottom of the inner concave part, and pins at the bottom of the power module penetrate through the avoiding holes and the avoiding grooves. And each mounting plate is correspondingly provided with one pressing strip which is pressed above the power supply module and is used for fixing the power supply module in the inner concave part of the mounting plate. The rubber mat is installed between the pressing strip and the power supply module to be tested and plays a role in protection. The tool guarantees that the vibration frequency and the impact magnitude of the table top can be effectively transmitted to the power module, the test efficiency is improved through the multi-station design, and the screening effectiveness is improved for a pin avoiding protection structure of the power module.

Description

Technical Field

[0001] The invention belongs to the field of power module testing devices, and particularly relates to a vibration / shock testing tooling for power modules. Background Art

[0002] A power module for a radar component is a key component of the radar component, responsible for the power supply requirements of the entire radar component, and requires high power, high reliability, and anti-vibration / shock characteristics. Before being put into use, in order to ensure that the power module meets the usage requirements, secondary screening is required, usually including normal temperature electrical performance testing, high and low temperature electrical performance testing, power aging screening tests, and vibration / shock tests, etc., to replace unqualified products in a timely manner and prevent unqualified products from flowing into the installation link.

[0003] When the power module undergoes vibration / shock tests, it is necessary to fully clamp and cooperate the power module with the tabletop of the vibration table to ensure that the vibration frequency and shock magnitude of the power module to be tested are consistent with those of the tabletop, thereby ensuring the effectiveness of the test. Otherwise, unqualified products cannot be effectively separated out. Existing test methods usually use two pressure bars to fix the power module to be tested on the tabletop of the vibration table for vibration / shock tests. The main disadvantages of this clamping method are as follows: 1. The fixed connection is insufficient and prone to loosening, making it impossible to effectively transfer the vibration frequency and magnitude of the vibration table tabletop to the power module to be tested; 2. Low efficiency, only one power module can be fixed each time; 3. Poor protection for the product to be tested, direct pressing and fixing are likely to damage the power module during the test; 4. Only horizontal two-dimensional vibration / shock tests can be performed. Since the two pressure bars directly press and install the power module to be tested on the tabletop, the pins of the power module cannot be avoided and protected, so only horizontal two-dimensional tests can be carried out, and three-dimensional tests including the Z-axis cannot be achieved.

[0004] Therefore, it is necessary to design a vibration / shock testing tooling for power modules to solve the above problems. Summary of the Invention

[0005] Technical Problems to be Solved

[0006] In order to avoid the deficiencies of the prior art, the invention provides a vibration / shock testing tooling for power modules, designing a multi-station base installed on the tabletop of the vibration table, and installing mounting plates that are common to various power modules on each station of the base for installing the power module to be tested, and connecting and fixing the power module through pressure bars. Thus, the problem in the prior art that the combination of the power module and the tabletop of the vibration table is insufficient and the vibration frequency and shock magnitude of the tabletop cannot be effectively transferred to the power module to be tested is solved.

[0007] The technical solution of the invention is: a vibration / shock testing tooling for power modules, including a base, a mounting plate, and a pressure bar;

[0008] The base is provided with mounting holes that match the tabletop of the vibration table for horizontally fixing the base on the tabletop; multiple inner grooves are provided on the upper surface of the base, and mounting plates are fixed above each inner groove;

[0009] The center of the mounting plate is provided with a concave portion for horizontally placing the power supply module to be tested; multiple avoidance holes and avoidance grooves penetrating the mounting plate are provided at the bottom of the concave portion for passing through the pins at the bottom of the power supply module to be tested;

[0010] One pressing strip is correspondingly installed on each mounting plate. The pressing strip presses above the power supply module to be tested, and both ends of the pressing strip are fixedly connected to the mounting plate for fixing the power supply module to be tested in the concave portion of the mounting plate.

[0011] A further technical solution of the present invention is that both ends of the mounting plate are fixedly connected to the upper surface of the base by screws. The concave portion of the mounting plate is located directly above the inner groove of the base, and the avoidance holes and avoidance grooves penetrate through to the inner groove of the base.

[0012] A further technical solution of the present invention is that the depth of the inner groove matches the pins of the power supply module to be tested to avoid interference with the pins.

[0013] A further technical solution of the present invention is that the concave portion of the mounting plate is adapted to power supply modules to be tested of multiple specifications, and the shapes and positions of the avoidance holes and avoidance grooves are set according to the pins of the power supply modules to be tested of multiple specifications.

[0014] A further technical solution of the present invention is that the models of the power supply modules to be tested of multiple specifications include: LY-28D05-W20, LY-28D05-W25, LY-28S20-W10, LY-28S28-W56, LY-EMI-2A, LY-EMI-3A.

[0015] A further technical solution of the present invention is that the base is installed at the center position of the tabletop of the vibration table. The mounting holes of the base are six, two of which are located at the center position of the base, and four are respectively located at the four corner positions of the base.

[0016] A further technical solution of the present invention is that the base is provided with six inner grooves; the inner grooves are through grooves that penetrate the base.

[0017] A further technical solution of the present invention is that the test tooling further includes a rubber pad, and the rubber pad is installed between the pressing strip and the power supply module to be tested to protect the power supply module.

[0018] A further technical solution of the present invention is that the pressure strip straddles the concave part of the mounting plate, is located in the middle of the mounting plate, and its two ends are fixed to the mounting plate by screws; a protruding part is provided on the lower surface of the pressure strip, and the protruding part is embedded in the concave part of the mounting plate for lateral limiting of the pressure strip; a concave limiting groove is provided at the center of the protruding part for fitting and limiting with the power supply module to be tested.

[0019] A further technical solution of the present invention is that the rubber pad is installed in the limiting groove.

[0020] Beneficial effects

[0021] The beneficial effects of the present invention are as follows: For the power module vibration / shock test tooling of the present invention, the base is fixed at the center position of the tabletop of the vibration table, and the center position and the periphery of the base are fixed with uniform force, and the installation is reliable. Six inner grooves are provided on the base as installation stations, mounting plates are fixedly installed on each inner groove, the power supply module to be tested is placed with its pins downward in the concave part of the mounting plate, and the pins of the power supply module to be tested extend into the inner grooves of the base through the avoidance holes and avoidance grooves, realizing the avoidance of the pins, so that the surface where the pins of the power supply module are located can be horizontally attached to the bottom surface of the concave part, facilitating the fixation of the power supply module and the protection of the pins. The upper part of the power supply module is fixedly installed by pressing with a pressing plate, and a rubber pad is installed between the pressing plate and the power supply module to protect the power supply module, avoiding damage to the product during the test.

[0022] The base of the present invention is provided with six installation stations, corresponding to six mounting plates, and the tests of six power supply modules can be realized simultaneously, improving the test efficiency. The tooling of the present invention is firmly connected to the tabletop of the vibration table, and at the same time, the power supply module can be firmly fixed in the concave part of the mounting plate, so as to effectively transfer the vibration frequency and magnitude. The installation method of the power supply module in the present invention, through the cooperative design of the avoidance holes, avoidance grooves and inner grooves, has a protective effect on the pins while fixing the power supply module. In addition to being able to realize the two-dimensional vibration / shock test in the horizontal X and Y directions, the vibration / shock test in the vertical Z-axis direction can also be carried out, and the screening effect of the three-dimensional space test on unqualified products is better.

[0023] The profile of the concave part of the mounting plate of the present invention is designed according to the maximum specification size among multiple specification power supply modules to meet the installation of multiple specification power supply modules. At the same time, the avoidance holes and avoidance grooves are adapted to the pins of multiple specification power supply modules, which can ensure the avoidance of the pins of multiple specification power supply modules, and has strong versatility.

[0024] The test tooling of the present invention is used for the vibration / shock test of the power supply module, and the test fully complies with the relevant requirements of GJB 150.16A-2009 Test Methods for Environmental Tests of Military Equipment Laboratories - Part 16: Vibration Tests, and GJB 150.18A-2009 Test Methods for Environmental Tests of Military Equipment Laboratories - Part 18: Shock Test Methods, proving that the test tooling meets the use requirements. Brief Description of the Drawings

[0025] Figure 1 Fig. 1 is an overall schematic view of the test tooling of the present invention installed on the tabletop of a vibration table;

[0026] Figure 2 Fig. 2 is a partial sectional schematic view of the test tooling of the present invention;

[0027] Figure 3 Fig. 3 is a schematic view of the tabletop structure of the vibration table;

[0028] Figure 4 Fig. 4 is a schematic view of the base structure in the present invention;

[0029] Figure 5 Fig. 5 is a schematic view of the mounting plate structure in the present invention;

[0030] Figure 6 Fig. 6 is a schematic view of the typical structure of the power supply module to be tested;

[0031] Figure 7 Fig. 7 is a schematic view of the pressing strip structure in the present invention.

[0032] Description of the reference numerals: 1. Base, 11. Mounting hole, 12. Inner groove, 13. First connection hole, 2. Mounting plate, 21. Inner concave part, 22. Avoidance hole, 23. Avoidance groove, 24. Second connection hole, 25. Third connection hole, 3. Pressing strip, 31. Protruding part, 32. Limiting groove, 33. Fourth connection hole, 4. Rubber pad, 5. Tabletop, 6. Power supply module to be tested, 61. Pin, 7. Screw. Detailed Embodiments

[0033] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0035] Refer to Figure 1, a vibration / shock test fixture for a power module of the present invention is installed on the tabletop 5 of a vibration table and is used to fix the power module 6 to be tested on the tabletop 5 to conduct a vibration / shock test on the power module 6, realizing the screening of the vibration / shock qualification of the power module 6 and preventing unqualified products from flowing into the installation link.

[0036] Refer to Figure 1-4 , a vibration / shock test fixture for a power module of the present invention includes a base 1, a mounting plate 2, a pressing strip 3, and a rubber pad 4.

[0037] The base 1 is a square plate structure, and mounting holes 11 for mating connection with the tabletop 5 of the vibration table are provided at its middle position and four corner positions. The vibration table is an American LING water-cooled vibration table, with the specific model being 2016VH. Its tabletop 5 is as Figure 3 shown. There are a plurality of M12 threaded holes with fixed positions on the tabletop 5 for installing test products. There are a total of six mounting holes 11 on the base 1, two of which are located at the center position of the base 1, and four are respectively located at the four corner positions of the base 1. The mounting holes 11 are specifically countersunk holes with a diameter of φ13, which cooperate with the M12 threaded holes on the tabletop 5. The evenly arranged mounting holes 11 can ensure uniform force on the base 1. The base 1 is horizontally fixed on the tabletop 5 through six mounting screws respectively passing through the mounting holes 11 and is located at the center position of the tabletop 5. In order to ensure the stable installation of the base 1 and prevent warping and deformation, bosses are provided around the mounting holes 11 on the lower surface of the base 1. The lower end surfaces of the bosses are parallel to the upper surface of the base 1, and the lower end surfaces of the bosses are in close contact with the tabletop 5 to ensure the horizontal fixation of the base 1.

[0038] Six inner grooves 12 are provided on the upper surface of the base 1. Every three inner grooves 12 are equally spaced and set as a row, and the two rows of inner grooves 12 are symmetrically arranged on both sides of the two middle mounting holes 11. In this embodiment, the inner groove 12 is a through groove with a rectangular cross-section that penetrates the base 1. The size of the inner groove 12 is larger than the outer dimension of the pins of the power module 6 to be tested, so as to ensure that the pins 61 of the power module 6 can be accommodated in the inner groove 12. First connection holes 13 are provided at the middle positions at both ends of each inner groove 12 for installing the mounting plate 2. The first connection holes 13 are specifically M5 threaded holes.

[0039] Refer to Figure 1 , 2, 5, 6, above each inner groove 12 of the base 1, a mounting plate 2 is fixed. The mounting plate 2 is a cuboid structure as a whole. At both ends, second connection holes 24 are provided to match the first connection holes 13 at both ends of the inner groove 12. The second connection holes 24 are specifically φ6 light holes. The mounting plate 2 is fixed to the base 1 by screwing a screw 7 through the second connection hole 24 and threadedly connecting it with the first connection hole 13. At the center position of the upper end surface of the mounting plate 2, a concave portion 21 is provided for horizontally placing the power supply module 6 to be tested. The concave portion 21 is also directly above the inner groove 12 of the base 1. At the bottom of the concave portion 21, a plurality of avoidance holes 22 and avoidance grooves 23 penetrating the mounting plate 2 are provided for passing through the pins 61 at the bottom of the power supply module 6 to be tested. The avoidance holes 22 and avoidance grooves 23 penetrate through to the inner groove 12 of the base 1. Refer to Figure 6 , Figure 6 is a typical structure of the power supply module 6 to be tested. During installation, the power supply module 6 to be tested is placed at the center position of the concave portion 21, so that a plurality of pins 61 at its bottom pass through the corresponding avoidance holes 22 and avoidance grooves 23 at the bottom of the concave portion 21, so that the surface where the pins 61 are located is completely attached to the bottom surface of the concave portion 21. At the same time, the ends of the pins 61 passing through the avoidance holes 22 and avoidance grooves 23 are located in the inner groove 12 of the base 1. Therefore, the thickness of the base 1 should ensure that the pins 61 of the power supply module 6 to be tested cannot touch the tabletop 5.

[0040] Furthermore, in order to achieve the versatility of the mounting plate 2 and make the concave portion 21 of the mounting plate 2 adapt to power supply modules 6 of multiple specifications, the cross-sectional dimensions of the concave portion 21 are designed according to the maximum outer contour dimensions of the commonly used power supply modules 6 to be tested. At the same time, the shapes and positions of the plurality of avoidance holes 22 and avoidance grooves 23 are designed by superimposing the positions and dimensions of the pins 61 of the power supply modules 6 of multiple specifications. In this embodiment, the mounting plate 2 simultaneously adapts to six models of power supply modules 6 to be tested, and the specific models include LY-28D05-W20, LY-28D05-W25, LY-28S20-W10, LY-28S28-W56, LY-EMI-2A, LY-EMI-3A.

[0041] Refer to Figure 1 , 2, after the power supply module 6 to be measured is installed on the mounting plate 2, it is fixed by pressing with the pressing strip 3. One pressing strip 3 is correspondingly installed on each mounting plate 2. The pressing strip 3 is in a strip structure. The pressing strip 3 straddles the concave portion 21 of the mounting plate 2, is located in the middle of the mounting plate 2, presses above the power supply module 6 to be measured, and its two ends are fixed to the mounting plate 2 by screws 7. Specifically, third connection holes 25 are provided at the middle positions on both sides of the concave portion 21 of the mounting plate 2. The straight line where the two third connection holes 25 are located is perpendicular to the straight line where the two second connection holes 24 are located. The third connection hole 25 is an M5 threaded hole. Fourth connection holes 33 matching the two third connection holes 25 are provided at both ends of the pressing strip 3. The fourth connection hole 33 is specifically a φ6 light hole. The pressing strip 3 is fixed to the mounting plate 2 by screwing the screw 7 through the fourth connection hole 33 and the third connection hole 25. The screw 7 for fixing the pressing strip 3 is tightened by a torque wrench to prevent it from being too loose to be firmly pressed or too tight to damage the power supply module 6 to be measured. A protruding portion 31 is provided on the lower surface of the pressing strip 3. The protruding portion 31 is embedded in the concave portion 21 of the mounting plate 2 for lateral limiting of the pressing strip 3. A concave limiting groove 32 is provided at the center of the protruding portion 31. The limiting groove 32 penetrates the protruding portion 31 along the length direction of the power supply module 6 to be measured for fitting and limiting with the upper end surface of the power supply module 6 to be measured.

[0042] Refer to Figure 2 , in order to protect the power supply module 6 to be measured and avoid being damaged by the pressing strip 3 during the test, a rubber pad 4 is provided between the pressing strip 3 and the power supply module 6 to be measured. The rubber pad 4 is made of rubber material and is fixed in the limiting groove 32 of the pressing strip 3 to play a protective role for the power supply module 6 to be measured.

[0043] In this embodiment, the base 1, the mounting plate 2, and the pressing strip 3 are all made of 45# steel through quenching processing, and have the characteristics of long service life, good hardness and not easy to deform.

[0044] The power supply module vibration / shock test fixture in this embodiment is firmly connected to the tabletop 5 of the vibration table, and the clamping of the power supply module 6 to be measured is reliable, which can ensure that the frequency and value of the vibration / shock test of the power supply module 6 to be measured are consistent with the tabletop 5. At the same time, the test of six products can be carried out, and the test efficiency is high. And it can realize the test in three spatial axis directions, improving the test effectiveness. The design of the rubber pad plays a protective role for the power supply module 6 to be measured.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principle and purpose of the present invention.

Claims

1. A power module vibration / shock test tool, characterized in that: It comprises a base (1), a mounting plate (2), and a pressure strip (3); The base (1) is provided with a mounting hole (11) matching the tabletop (5) of the vibration table, and is used to fix the base (1) horizontally on the tabletop (5); the upper surface of the base (1) is provided with a plurality of inner grooves (12), and a mounting plate (2) is fixed above each inner groove (12); The center of the mounting plate (2) is provided with an inner recess (21) for horizontally placing the power module (6) to be tested; the bottom of the inner recess (21) is provided with a plurality of avoidance holes (22) and avoidance grooves (23) that penetrate the mounting plate (2) and are used to pass through pins (61) at the bottom of the power module (6) to be tested; A pressure strip (3) is correspondingly mounted on each mounting plate (2), the pressure strip (3) being pressed on the top of the power module (6) to be tested, and the two ends of the pressure strip (3) being fixedly connected to the mounting plate (2) for fixing the power module (6) to be tested to the inner recess (21) of the mounting plate (2).

2. The power module vibration / shock test tool according to claim 1, characterized in that: The two ends of the mounting plate (2) are fixedly connected to the upper surface of the base (1) by means of screws (7); the inner recess (21) of the mounting plate (2) is located directly above the inner recess (12) of the base (1); and the avoidance hole (22) and the avoidance groove (23) are connected to the inner recess (12) of the base (1).

3. The power module vibration / shock test tool according to claim 2, characterized in that: The depth of the inner groove (12) matches the pin (61) of the power module (6) to be tested and avoids interference with the pin (61).

4. The power module vibration / shock test fixture according to claim 2, characterized in that: The inner recess (21) of the mounting plate (2) is adapted to various specifications of power modules (6) to be tested, and the shapes and positions of the plurality of avoidance holes (22) and avoidance grooves (23) are arranged according to the pins (61) of the power modules to be tested of various specifications.

5. The power module vibration / shock test tool according to claim 4, characterized in that: The models of the power modules (6) to be tested of various specifications include: LY-28D05-W20, LY-28D05-W25, LY-28S20-W10, LY-28S28-W56, LY-EMI-2A, and LY-EMI-3A.

6. The power module vibration / shock test tool according to claim 1, characterized in that: The base (1) is installed at the center of the tabletop (5) of the vibration table. The base (1) is provided with six mounting holes (11), two of which are located at the center of the base (1) and four are respectively located at four corners of the base (1).

7. The power module vibration / shock test tool according to claim 1, characterized in that: The base (1) is provided with six inner grooves (12); the inner grooves (12) are through grooves that penetrate the base (1).

8. The power module vibration / shock test tool according to claim 1, characterized in that: The test fixture further comprises a rubber pad (4), which is installed between the pressure strip (3) and the power module (6) to be tested, and plays a role in protecting the power module (6) to be tested.

9. The power module vibration / shock test tool according to claim 8, characterized in that: The pressure strip (3) spans the inner recess (21) of the mounting plate (2), is located in the middle of the mounting plate (2), and its two ends are fixed to the mounting plate (2) by screws (7); a protrusion (31) is provided on the lower surface of the pressure strip (3), and the protrusion (31) is embedded in the inner recess (21) of the mounting plate (2) to limit the pressure strip (3) laterally; a concave limiting groove (32) is provided in the center of the protrusion (31) to be engaged with the power module (6) to be tested for limiting.

10. The power module vibration / shock test tool according to claim 9, characterized in that: The rubber pad (4) is installed in the limiting groove (32).

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