Tool for realizing withstand voltage test of multiple winding inductors and test method thereof

Abstract

The invention discloses a multi-winding inductor withstand voltage test tool and a test method thereof.The multi-winding inductor withstand voltage test tool comprises a base, a discharging seat, an elastic telescopic probe set, a sliding plate and a telescopic air cylinder, the discharging seat is arranged in the middle of the base in the front-back direction, a multi-winding inductor containing groove is formed in the top of the discharging seat, and a plurality of through holes are formed in the front side and the rear side of the multi-winding inductor containing groove; the multiple elastic telescopic probe sets are symmetrically arranged on the front portion and the rear portion of the discharging base, each elastic telescopic probe set is fixedly connected to the sliding plate and can penetrate through the corresponding through hole to abut against a pin of the multi-winding inductor, the sliding plate is connected to the two guide rods through the two linear bearings, and the two guide rods are fixedly connected to the discharging base in the left-right direction. The sliding plate is connected with a telescopic cylinder driving the sliding plate to move. According to the invention, the test accuracy can be improved, the measurement error caused by the non-contact of some pins due to the distance adjustment error of the existing electrode block is avoided, and the measurement efficiency and reliability are higher.

Description

Technical Field

[0001] The invention belongs to the technical field of multiple winding withstand voltage test equipment, relates to a tool for realizing multiple winding inductance withstand voltage test, and also relates to a test method for realizing multiple winding inductance withstand voltage test tool. Background Art

[0002] For multiple winding groups of inductor devices, withstand voltage tests need to be performed on each of them separately. The conventional method is to adjust the spacing between the two electrode blocks (the two electrode blocks are connected to the tester) to match the spacing of the pins connected to the windings. After power is turned on, the withstand voltage between the two windings can be tested. After testing one group, the spacing between the electrode blocks is adjusted to place the products and then test the other group. Summary of the invention

[0003] The first invention objective of the present invention is to provide a tooling and a testing method for realizing a withstand voltage test of multiple winding inductances, which can realize single winding measurement of multiple winding inductances and improve the test accuracy; The technical solution adopted by the present invention is: a tooling for realizing a withstand voltage test of multiple winding inductors, comprising a base, a discharge seat, an elastic telescopic probe group, a sliding plate and a telescopic cylinder, the discharge seat is arranged in the middle of the front-to-back direction of the base, a multi-winding inductor placement groove is arranged on the top of the discharge seat, and a plurality of through holes that can face the pins of the multi-winding inductor are arranged on the front and rear sides of the multi-winding inductor placement groove, multiple groups of elastic telescopic probe groups are symmetrically arranged in front and behind the discharge seat, each group of elastic telescopic probe groups is fixedly connected to the sliding plate and the elastic telescopic probe group can penetrate into the through hole and rest on the pins of the multi-winding inductor, the sliding plate is connected to two guide rods through two linear bearings, the two guide rods are fixedly connected to the discharge seat on the left and right, the cylinder rod of the telescopic cylinder is fixedly connected to the outer side of the sliding plate, the tail of the cylinder seat of the telescopic cylinder is fixedly connected to the fixed seat, and the fixed seat is fixedly connected to the base.

[0004] Furthermore, the above-mentioned elastic telescopic probe group includes a plurality of elastic telescopic probes and a probe fixing plate. The probe fixing plate is a strip frame structure, and a plurality of strip through holes are opened along its length direction. A plurality of mounting through holes and threading holes are respectively arranged on the front and rear sides of the strip through holes. The plurality of elastic telescopic probes are fixedly connected to the plurality of mounting through holes and the probe heads face the material discharge seat. The wires connected to the plurality of elastic telescopic probes are connected to the test connector after passing through the threading holes.

[0005] Furthermore, the probe fixing plate is provided with a plurality of longitudinal strip holes in the length direction, and a plurality of screws are passed through the plurality of longitudinal strip holes to connect the probe fixing plate to a support platform provided on the top of the sliding plate at a high degree.

[0006] Furthermore, the above-mentioned test connector is arranged on the front side of the base, and the base includes a top plate, a bottom plate and a side plate. The four sides between the top plate and the bottom plate are fixedly connected by four side plates. The test connector is fixedly connected to the side plate on the front side. The left and right side plates are provided with front pipe holes, and the top plate is provided with a wire threading hole and a top pipe threading hole.

[0007] Furthermore, rubber support blocks are arranged at the bottom of the base plate near the four corners.

[0008] Furthermore, the above-mentioned discharge seat includes a base body and a discharge plate, a lower limit convex strip is arranged at the bottom of the discharge plate along its length direction, and an upper limit groove matching the lower limit convex strip is arranged at the top of the base body along its length direction. After the lower limit convex strip is embedded in the upper limit groove, it is locked with multiple screws.

[0009] A test method for implementing a plurality of winding inductance withstand voltage test fixtures, the method comprising the following steps: Step 1, placing a plurality of multi-winding inductors into a multi-winding inductor placement slot; Step 2, start the telescopic cylinder, when the telescopic cylinder is extended, the probes of the elastic telescopic probe group on both sides of the multi-winding inductor can elastically lean against the pins of the multi-winding inductor; Step 3, connect the elastic retractable probe set to the tester, connect the corresponding pins of each winding of the multi-winding inductor, and then test the withstand voltage test of each winding of each multi-winding inductor; Step 4: After completing one test, proceed to the next multi-winding inductor test until all tests are completed.

[0010] Beneficial effects of the present invention: Compared with the prior art, the effects of the present invention are as follows: (1) The structure of the present invention realizes independent measurement and simultaneous measurement of a single winding of a multi-winding inductor by corresponding probes to the single winding pins of the multi-winding inductor, thereby improving the test accuracy. In addition, the independent pins are elastically retracted and electrically connected separately, thereby avoiding the measurement error caused by the non-contact of some pins due to the adjustment distance error of the existing electrode block. The measurement efficiency and reliability are higher. The cylinder pushes the sliding plate to move in a straight line along the linear bearing, greatly improving the accuracy of directional movement. The cylinder realizes the initial positioning of the sliding plate, and then the elastic retractable probe is elastically pressed against the pins to achieve reliable electrical contact with good stability. (2) Each probe group uses multiple probes, which contact the pins at the same time and are fixed on the probe fixing plate. They move and stretch elastically synchronously, and the consistency is relatively good. In addition, the probe fixing plate with a strip through-hole structure is light in weight, which is convenient for arranging probes in the threading box. (3) The longitudinal strip hole is used in conjunction with the screw to adjust the longitudinal position of the probe relative to the sliding plate. The adjustment is convenient and quick, thereby realizing the rapid adjustment of different elastic forces to meet the elastic force requirements of different devices and avoid the pins being damaged during the test due to excessive elastic force; (4) The base has a simple structure and light weight, which is convenient for arranging joints, threading wires and pipes; (5) The setting of rubber support blocks helps to play a shock-absorbing support role; (6) The feed plate structure is convenient for replacement of different devices, thereby adapting to the measurement of multi-winding inductor devices with different numbers of pins, reducing costs. The matching mode of the line convex strips and grooves is accurate in positioning, has good repeatability, and is easy and quick to assemble. The lateral position can also be fine-tuned by relying on the step holes and screw gaps on the feed plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of a tooling for realizing multiple winding withstand voltage tests; Figure 2 It is a schematic diagram of the front structure of a tooling for realizing multiple winding withstand voltage tests; Figure 3 It is a schematic diagram of the top view of the structure of the tooling for realizing multiple winding withstand voltage tests; Figure 4 It is a right view structural schematic diagram of a tooling for realizing multiple winding withstand voltage tests. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] Example 1: Figure 1-4As shown, a tooling for realizing a withstand voltage test of multiple winding inductors comprises a base 1, a feeding seat 2, an elastic telescopic probe group 3, a sliding plate 4 and a telescopic cylinder 5. The feeding seat 2 is arranged in the middle of the front-to-back direction of the base 1, a multi-winding inductor placement slot 6 is arranged on the top of the feeding seat 2, and a plurality of through holes 7 that can face the pins of the multi-winding inductors are arranged on the front and rear sides of the multi-winding inductor placement slot 6. Multiple groups of elastic telescopic probe groups 3 are symmetrically arranged in front and behind the feeding seat 2, each group of elastic telescopic probe groups 3 is fixedly connected to the sliding plate 4 and the elastic telescopic probe group 3 can penetrate the through hole 7 and abut against the pins of the multi-winding inductors, the sliding plate 4 is connected to two guide rods 9 through two linear bearings 8, and the two guide rods 9 are fixedly connected to the feeding seat 2 on the left and right, and the cylinder rod of the telescopic cylinder 5 is fixed. The tail of the cylinder seat of the telescopic cylinder 5 is connected to the outer side of the sliding plate 4 and is fixedly connected to the fixed seat 10, and the fixed seat 10 is fixedly connected to the base 1. The structure of the present invention corresponds to the single winding pin of the multi-winding inductor through the corresponding probe, thereby realizing independent measurement and simultaneous measurement of a single winding of the multi-winding inductor, thereby improving the test accuracy, and the independent pins are elastically and electrically connected separately, thereby avoiding the measurement error caused by the non-contact of some pins of the existing electrode block due to the adjustment distance error, and the measurement efficiency and reliability are higher. The cylinder pushes the sliding plate to move in a straight line along the linear bearing, thereby greatly improving the accuracy of directional movement. The cylinder realizes the initial positioning of the sliding plate, and then the elastic telescopic probe is elastically pressed against the pin, thereby realizing reliable electrical contact with good stability.

[0014] Among them, the elastic telescopic probe group 3 includes multiple elastic telescopic probes 301 and a probe fixing plate 302. The probe fixing plate 302 is a strip frame structure, and multiple strip through holes 303 are opened along its length direction. The front and rear sides of the strip through holes 303 are respectively provided with multiple mounting through holes 304 and threading holes 305 facing each other. The multiple elastic telescopic probes 301 are fixedly connected to the multiple mounting through holes 304 and the probe heads face the material discharge seat 2. The wires connected to the multiple elastic telescopic probes 301 pass through the threading holes 305 and are connected to the test connector 11. Each probe group uses multiple probes, which contact the pins at the same time and are fixed on the probe fixing plate. The probe fixing plate 302 is movable and elastically retracted step by step, and its consistency is relatively good. In addition, the probe fixing plate with a strip through-hole structure is light in weight, and it is convenient to arrange the probes in the wiring box. A plurality of longitudinal strip holes 306 are arranged in the length direction of the probe fixing plate 302, and a plurality of screws are used to pass through the plurality of longitudinal strip holes 306 to connect the probe fixing plate 302 to a support platform 401 arranged on the top of the sliding plate 4 at a high degree. The longitudinal strip holes are used in combination with the screws to realize the adjustment of the longitudinal position of the probe relative to the sliding plate, and the adjustment is convenient and quick, thereby realizing the rapid adjustment of different elastic forces, adapting to the elastic force requirements of different devices, and avoiding the pins from being damaged during the test due to excessive elastic force.

[0015] In order to facilitate the connection of wiring, the test connector 11 is arranged on the front side of the base 1. The base 1 includes a top plate 101, a bottom plate 102 and a side plate 103. The four sides between the top plate 101 and the bottom plate 102 are fixedly connected by four side plates 103. The test connector 11 is fixedly connected to the side plate 103 on the front side. The left and right side plates 103 are provided with front pipe holes 104, and the top plate 101 is provided with threading holes 105 and top pipe holes 106. The base has a simple structure and light weight, which is convenient for arranging connectors and threading wires and pipes. Rubber support blocks 107 are provided near the four corners at the bottom of the bottom plate 102. The provision of the rubber support blocks helps to play a shock-absorbing support role.

[0016] In order to achieve rapid installation and loading and unloading replacement, the discharge seat 2 includes a base body 201 and a discharge plate 202. A lower limit convex strip 203 is arranged at the bottom of the discharge plate 202 along its length direction, and an upper limit groove 204 matching the lower limit convex strip 203 is arranged at the top of the base body 201 along its length direction. After the lower limit convex strip 203 is embedded in the upper limit groove 204, it is locked with multiple screws. The discharge plate structure is convenient for replacement of different devices, and thus adapts to the measurement of multi-winding inductor devices with different numbers of pins, reducing costs. Moreover, the matching mode of the line convex strip and the groove has accurate positioning and good repeatability, and is convenient and quick to assemble. Relying on the step hole and the screw gap on the discharge plate, the lateral position can be fine-tuned.

[0017] Embodiment 2: A test method for implementing a tool for testing the inductance withstand voltage of multiple windings, the method comprising the following steps: Step 1, placing a plurality of multi-winding inductors into a multi-winding inductor placement slot; Step 2, start the telescopic cylinder, when the telescopic cylinder is extended, the probes of the elastic telescopic probe group on both sides of the multi-winding inductor can elastically lean against the pins of the multi-winding inductor; Step 3, connect the elastic retractable probe set to the tester, connect the corresponding pins of each winding of the multi-winding inductor, and then test the withstand voltage test of each winding of each multi-winding inductor; Step 4: After completing one test, proceed to the next multi-winding inductor test until all tests are completed.

[0018] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A tool for realizing multiple winding inductance withstand voltage test, characterized in that: The invention comprises a base (1), a material discharging seat (2), an elastic telescopic probe group (3), a sliding plate (4) and a telescopic cylinder (5), wherein the material discharging seat (2) is arranged in the middle of the base (1) in the front-to-back direction, a multi-winding inductor placement groove (6) is arranged on the top of the material discharging seat (2), and a plurality of through holes (7) that can face the pins of the multi-winding inductor are arranged on the front and rear sides of the multi-winding inductor placement groove (6), and a plurality of elastic telescopic probe groups (3) are symmetrically arranged in front and rear of the material discharging seat (2), and each group of elastic telescopic probe groups (3) is fixed. The elastic telescopic probe group (3) is connected to the sliding plate (4) and can be inserted into the through hole (7) to abut against the pins of the multi-winding inductor. The sliding plate (4) is connected to two guide rods (9) through two linear bearings (8). The two guide rods (9) are fixedly connected to the unloading seat (2) on the left and right. The cylinder rod of the telescopic cylinder (5) is fixedly connected to the outer side of the sliding plate (4). The tail of the cylinder seat of the telescopic cylinder (5) is fixedly connected to the fixed seat (10). The fixed seat (10) is fixedly connected to the base (1).

2. The tooling for realizing multiple winding inductance withstand voltage test according to claim 1, characterized in that: The elastic telescopic probe group (3) comprises a plurality of elastic telescopic probes (301) and a probe fixing plate (302); the probe fixing plate (302) is a strip frame structure, and is provided with a plurality of strip through holes (303) along its length direction; the front and rear sides of the strip through holes (303) are respectively provided with a plurality of mounting through holes (304) and threading holes (305) facing each other; the plurality of elastic telescopic probes (301) are fixedly connected to the plurality of mounting through holes (304) with the probe heads facing the material discharging seat (2); and the wires connected to the plurality of elastic telescopic probes (301) are connected to the test connector (11) after passing through the threading holes (305).

3. The tooling for realizing multiple winding inductance withstand voltage test according to claim 2, characterized in that: The probe fixing plate (302) is provided with a plurality of longitudinal strip holes (306) in the length direction, and a plurality of screws are passed through the plurality of longitudinal strip holes (306) to connect the probe fixing plate (302) at a height to a support platform (401) provided on the top of the sliding plate (4).

4. The tooling for realizing multiple winding inductance withstand voltage test according to claim 1, characterized in that: The test connector (11) is arranged on the front side of the base (1); the base (1) comprises a top plate (101), a bottom plate (102) and a side plate (103); the top plate (101) and the bottom plate (102) are fixedly connected on four sides via four side plates (103); the test connector (11) is fixedly connected to the front side plate (103); the left and right side plates (103) are provided with front pipe-through holes (104); and the top plate (101) is provided with a wire-through hole (105) and a top pipe-through hole (106).

5. The tooling for realizing multiple winding inductance withstand voltage test according to claim 4, characterized in that Rubber support blocks (107) are arranged near the four corners of the bottom of the base plate (102).

6. The tooling for realizing multiple winding inductance withstand voltage test according to claim 1, characterized in that: The material discharge seat (2) comprises a base body (201) and a material discharge plate (202); a lower limit convex strip (203) is arranged at the bottom of the material discharge plate (202) along its length direction; an upper limit groove (204) cooperating with the lower limit convex strip (203) is arranged at the top of the base body (201) along its length direction; the lower limit convex strip (203) is embedded in the upper limit groove (204) and is locked by a plurality of screws.

7. A test method for implementing a plurality of winding inductance withstand voltage test fixtures according to claim 1, characterized in that: The method comprises the following steps: Step 1, placing a plurality of multi-winding inductors into a multi-winding inductor placement slot; Step 2, start the telescopic cylinder, when the telescopic cylinder is extended, the probes of the elastic telescopic probe group on both sides of the multi-winding inductor can elastically lean against the pins of the multi-winding inductor; Step 3, connecting the elastic retractable probe set (3) to the tester, connecting the corresponding pins of each winding of the multi-winding inductor, and then testing the withstand voltage test of each winding of each multi-winding inductor; Step 4: After completing one test, proceed to the next multi-winding inductor test until all tests are completed.

Images