A multi-module power device test fixture

Abstract

The utility model discloses a kind of multi-module power device test fixtures, wherein, including: portal frame is installed on base platform;Base platform installs elastic ball head wave pearl screw, the ball head of elastic ball head wave pearl screw protrudes the upper surface of base platform, base is slidably arranged on base platform, the lower surface of base is equipped with several pin holes, the ball head of elastic ball head wave pearl screw can be inserted into any one pin hole;Probe plate is installed on base platform, pressing device is installed on the upper end of portal frame, pressing device drives probe plate to move towards or away from the direction of base.This device has the characteristics such as simple structure easy to make, low cost, simple and flexible operation, multi-point accurate positioning etc..Through multi-point accurate positioning clamping, multiple-unit product can be accurately partitioned test, realize only using a set of test fixture, multiple-unit product test operation can be completed, originally complex and tedious multiple-unit product test step is simplified, greatly improve the overall test efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of test fixtures for power devices in multi-module states, and in particular to a test fixture for multi-module power devices. Background Technology

[0002] The power electronics industry is increasingly demanding packaging technology, and electric drive systems are constantly evolving. TPAK packaging technology is widely used due to its advantages such as high power, low parasitic parameters, high density, good heat dissipation, and flexible and diverse layouts. However, existing test fixtures can only test a single TPAK packaged unit and cannot test multiple units. Utility Model Content

[0003] In view of this, and to solve the above problems, the purpose of this utility model is to provide a multi-module power device test fixture, comprising: Base platform, gantry frame, base, probe plate, clamping device; The gantry frame is mounted on the base platform; The base platform is equipped with a flexible ball head screw, the ball head of which protrudes from the upper surface of the base platform. The base is slidably disposed on the base platform. The lower surface of the base is provided with a plurality of pin holes, and the ball head of the flexible ball head screw can extend into any one of the pin holes. The probe plate is mounted on the base platform, and the clamping device is mounted on the upper end of the gantry frame. The clamping device drives the probe plate to move toward or away from the base.

[0004] In the aforementioned multi-module power device test fixture, at least one limiting bolt is installed on the upper surface of the base platform, and at least one limiting groove is provided on the lower surface of the base. The limiting bolt can slide within the limiting groove, and the base is limited to the base platform by the limiting bolt and the limiting groove.

[0005] In the aforementioned multi-module power device test fixture, a plurality of movable axes are mounted on the upper surface of the base platform, and the probe plate is movably mounted on the plurality of the movable axes.

[0006] The aforementioned multi-module power device test fixture includes a clamping device comprising: a handle, a connecting rod, a pressure rod, and a pressure head; the handle is rotatably mounted on the gantry frame, and the connecting rod, the pressure rod, and the pressure head are sequentially mounted on the handle; the handle drives the pressure head to clamp the probe plate via the connecting rod and the pressure rod.

[0007] The aforementioned multi-module power device test fixture further includes: a fixed base; the fixed base is mounted on the gantry frame, the handle is rotatably mounted on the fixed base, the fixed base has a through hole, and the pressure rod passes through the through hole to mount the pressure head.

[0008] The aforementioned multi-module power device test fixture includes a slide rail on the upper surface of the base platform and a slider on the lower surface of the base. The base is slidably mounted on the base platform via the slider and the slide rail.

[0009] In the aforementioned multi-module power device test fixture, a plurality of pin holes are arranged in an array along the length direction of the base on the lower surface of the base.

[0010] In the aforementioned multi-module power device test fixture, a plurality of positioning pins are mounted on the lower surface of the probe plate, and a plurality of positioning bushings are mounted on the upper surface of the base, wherein the plurality of positioning pins can be inserted into the plurality of positioning bushings.

[0011] In the aforementioned multi-module power device test fixture, a plurality of the aforementioned lifting and positioning pins are mounted on the upper surface of the base.

[0012] In the aforementioned multi-module power device test fixture, several of the moving axes are mounted on the base platform via several bidirectional telescopic spring columns, and the probe plate is capable of moving along the several moving axes and the several bidirectional telescopic spring columns.

[0013] The positive effects of the above technical solution compared with the existing technology are: This invention provides a multi-module power device test fixture. The device, through the movement of the base relative to the base platform and the sequential matching and installation of several pin holes and elastic ball head screws, enables the measurement of multi-unit products under test. It features a simple structure, easy manufacturing, low cost, simple and flexible operation, and multi-point precise positioning. Through multi-point precise positioning and clamping, multi-unit products can be accurately tested in designated areas. This allows for the completion of testing multiple groups of multi-unit products using only one test fixture, simplifying the originally complex and cumbersome testing steps, greatly improving overall testing efficiency, and effectively reducing testing costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a multi-module power device test fixture according to the present invention.

[0015] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0016] Figure 3, Figure 5 , Figure 6 This is a schematic diagram of the testing of the product to be tested in this utility model.

[0017] Figure 4 for Figure 3 Enlarged view of section C.

[0018] Figure 7 This is a schematic diagram showing the product under test after the test is completed in this utility model.

[0019] 1. Base platform; 2. Elastic ball head screw; 3. Slider; 4. Limit bolt; 5. Base; 6. Positioning bushing; 7. Lifting positioning pin; 8. Product to be tested; 9. Bidirectional telescopic spring column; 10. Moving shaft; 11. Probe plate; 12. Positioning pin; 13. Gantry frame; 14. Clamping device; 15. Pin hole; 16. Handle; 17. Connecting rod; 18. Pressure rod; 19. Pressure head; 20. Fixed seat. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0021] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0022] like Figures 1 to 7 As shown, a preferred embodiment of a multi-module power device test fixture is illustrated, which includes: a base platform 1, a gantry 13, a base 5, a probe plate 11, and a clamping device 14.

[0023] The gantry frame 13 is installed on the base platform 1; the base platform 1 is equipped with a flexible ball head screw 2, the ball head of the flexible ball head screw 2 protrudes from the upper surface of the base platform 1, the base 5 is slidably set on the base platform 1, and the lower surface of the base 5 is provided with a number of pin holes 15, the ball head of the flexible ball head screw 2 can extend into any one of the pin holes 15; the probe plate 11 is installed on the base platform 1, and the clamping device 14 is installed on the upper end of the gantry frame 13, the clamping device 14 drives the probe plate 11 to move toward or away from the base 5.

[0024] In actual use, the multi-unit product under test (DUT) 8 is placed on the base 5. Each unit of the DUT 8 has a pin hole 15 at its position on the base 5. When the base 5 is moved and a pin hole 15 is engaged with the ball head of the elastic ball head screw 2, the clamping device 14 is pressed. The clamping device moves the probe plate 11 toward the DUT 8. The DUT 8 is then connected to the electrical performance testing equipment port through the probes and the leads on the probes to complete the test. Then, the base 5 is pulled again and the above steps are repeated to test each unit of the DUT 8.

[0025] Based on the above, this utility model also has the following embodiments: Furthermore, a multi-module power device test fixture includes a base platform 1 with at least one limiting bolt 4 mounted on its upper surface, and a base 5 with at least one limiting groove on its lower surface. The limiting bolt 4 can slide within the limiting groove, and the base 5 is limited to the base platform 1 by the limiting bolt 4 and the limiting groove. Specifically, the limiting groove is provided on the lower surface of the base 5 along the direction of movement of the base 5, and can be a rectangular strip groove. The base 5 can slide on the base platform 1. When the limiting bolt 4 contacts the inner wall of the limiting groove, it alerts the user that the base 5 has moved to its maximum range of motion, and the user stops moving it to prevent the base 5 from being pulled out of the slide rail.

[0026] Furthermore, a multi-module power device test fixture is provided, wherein a plurality of movable shafts 10 are mounted on the upper surface of the base platform, and a probe plate 11 is movably mounted on the plurality of movable shafts 10.

[0027] Furthermore, a multi-module power device test fixture includes a clamping device 14 comprising: a handle 16, a connecting rod 17, a pressure rod 18, and a pressure head 19. The handle 16 is rotatably mounted on the gantry 13. The connecting rod 17, pressure rod 18, and pressure head 19 are sequentially mounted on the handle 16. The handle 16 drives the pressure head 19 to clamp the probe plate 11 via the connecting rod 17 and pressure rod 18. Specifically, flipping the handle 16 causes the connecting rod 17 to press down via its connection point with the connecting rod 17. The connecting rod 17 then drives the pressure rod 18 to press down, which in turn drives the pressure head 19 to press down, thereby pressing the probe plate 11 down.

[0028] Furthermore, a multi-module power device test fixture further includes: a fixed base 20; the fixed base 20 is mounted on the gantry 13, and the handle 16 is rotatably mounted on the fixed base 20. The fixed base 20 has a through hole, through which the pressure rod 18 passes to mount the pressure head 19. Specifically, the fixed base 20 not only mounts the handle 16 but also provides a direction for movement for the pressure rod 18.

[0029] Furthermore, a multi-module power device test fixture is provided, wherein the upper surface of the base platform 1 is provided with a slide rail, and the lower surface of the base 5 is provided with a slider 3. The base 5 is slidably mounted on the base platform 1 via the slider 3 and the slide rail. Specifically, the slide rail and the slider 3 are oriented in the same direction as the arrangement of a plurality of 15 pin holes.

[0030] Furthermore, a multi-module power device test fixture is provided, wherein a plurality of pin holes 15 are arranged in an array along the length direction of the base 5 on the lower surface of the base 5. Specifically, the distance between any two pin holes 15 is the same, such that each pin hole 15 can correspond to a unit of the product under test 8 above it.

[0031] Furthermore, a multi-module power device test fixture is provided, wherein a plurality of positioning pins 12 are mounted on the lower surface of the probe plate 11, and a plurality of positioning bushings 6 are mounted on the upper surface of the base 5, wherein the plurality of positioning pins 12 can be inserted into the plurality of positioning bushings 6. Specifically, when testing each product under test 8, the product under test 8 is first positioned through the pin hole 15 and the elastic ball head screw 2, and then the positioning pins 12 are inserted into the positioning bushings 6 when the clamping device 14 is pressed down, thereby performing a second positioning, and finally the product under test 8 is tested.

[0032] Furthermore, a multi-module power device test fixture is provided, wherein a plurality of lifting and positioning pins 7 are mounted on the upper surface of the base 5. Specifically, the product under test 8 is placed on the lifting and positioning pins 7, which can lift and position the product under test 8 to prevent damage to the liquid cooling part of the product under test 8.

[0033] Furthermore, a multi-module power device test fixture is provided, wherein a plurality of movable shafts 10 are mounted on a base platform 1 via a plurality of bidirectional telescopic spring columns 9, and a probe plate 11 is movable along the plurality of movable shafts 10 and the plurality of bidirectional telescopic spring columns 9. Specifically, the bidirectional telescopic spring columns 9 are capable of supporting the probe plate 11 and moving upward to spring back to its original position.

[0034] The specific usage method of this device is as follows; By placing the product under test 8 on the lifting positioning pin 7 on the sliding base 5 and pulling the base 5, the first unit of the product under test 8 is initially positioned when significant resistance is first generated. At this time, the resistance comes from the contact between the top ball of the initial positioning elastic ball head screw 2 at the center point of the base platform 1 and the first pin hole 15 on the lower surface of the base 5. The handle 16 is flipped and pressed down. During this process, the moving axis 10 of the base platform 1 provides vertical linear guidance for the probe plate 11. The positioning pin 12 is inserted into the positioning bushing 6 on the base 5, so that the probe on the probe plate 11 and the terminal of the product under test 8 are precisely aligned and corrected for the second time. Pressing down until it does not automatically spring back completes the clamping of the first unit of the product under test 8. Figure 3 As shown. The first unit of the product under test 8 is connected to the port of the electrical performance testing equipment through the probes on the probe plate 11 in contact with it and the leads on the probes to complete the test.

[0035] After the first unit test of product 8 is completed, flip handle 16. Probe plate 11 is lifted and reset under the action of bidirectional telescopic spring column 9. To proceed with the next unit test of product 8, push or pull base 5 to the initial limit resistance point of the next unit. Repeating the above operation completes the clamping and testing. Figure 5 and Figure 6 The image shows the test operation status of the second and third units of the product under test.

[0036] After the entire product testing is completed, flip handle 16. After probe plate 11 springs back to its original position, pull base 5 outward. When the limiting groove at the bottom of base 5 contacts the inner wall of limiting bolt 4 on base platform 1, the product to be tested 8 can be replaced to continue the testing task, or the tested product can be removed to end the testing task. Figure 7 As shown.

[0037] This device can not only test multiple units of the product under test 8, but also simultaneously place and test multiple products under test with only one unit.

[0038] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A test fixture for multi-module power devices, characterized in that, include: Base platform, gantry frame, base, probe plate, clamping device; The gantry frame is mounted on the base platform; The base platform is equipped with a flexible ball head screw, the ball head of which protrudes from the upper surface of the base platform. The base is slidably disposed on the base platform. The lower surface of the base is provided with a plurality of pin holes, and the ball head of the flexible ball head screw can extend into any one of the pin holes. The probe plate is mounted on the base platform, and the clamping device is mounted on the upper end of the gantry frame. The clamping device drives the probe plate to move toward or away from the base.

2. The multi-module power device test fixture according to claim 1, characterized in that, At least one limiting bolt is installed on the upper surface of the base platform, and at least one limiting groove is provided on the lower surface of the base. The limiting bolt can slide in the limiting groove, and the base is limited to the base platform by the limiting bolt and the limiting groove.

3. The multi-module power device test fixture according to claim 1, characterized in that, The upper surface of the base platform is equipped with several movable shafts, and the probe plate is movably mounted on several of the movable shafts.

4. The multi-module power device test fixture according to claim 1, characterized in that, The clamping device includes: a handle, a connecting rod, a pressure rod, and a pressure head; the handle is rotatably mounted on the gantry frame, and the connecting rod, the pressure rod, and the pressure head are sequentially mounted on the handle. The handle drives the pressure head to clamp the probe plate through the connecting rod and the pressure rod.

5. A multi-module power device test fixture according to claim 4, characterized in that, Also includes: Fixed base; The fixed base is installed on the gantry frame, the handle is rotatably installed on the fixed base, the fixed base is provided with a through hole, and the pressure rod passes through the through hole to install the pressure head.

6. A multi-module power device test fixture according to claim 1, characterized in that, The upper surface of the base platform is provided with a slide rail, and the lower surface of the base is provided with a slider. The base is slidably mounted on the base platform via the slider and the slide rail.

7. A multi-module power device test fixture according to claim 1, characterized in that, A plurality of the pin holes are arranged in an array along the length of the base on the lower surface of the base.

8. A multi-module power device test fixture according to claim 1, characterized in that, The lower surface of the probe plate is equipped with several positioning pins, and the upper surface of the base is equipped with several positioning bushings. The positioning pins can be inserted into the positioning bushings.

9. A multi-module power device test fixture according to claim 1, characterized in that, The upper surface of the base is equipped with several lifting and positioning pins.

10. A multi-module power device test fixture according to claim 3, characterized in that, Several of the movable axes are mounted on the base platform via several bidirectional telescopic spring columns, and the probe plate is capable of moving along the several movable axes and the several bidirectional telescopic spring columns.

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