Crimping type IGBT test tool

Abstract

The utility model discloses a crimping type IGBT (Insulated Gate Bipolar Transistor) test tool, which comprises a machine frame and a turntable arranged in the machine frame, detection equipment is arranged in the machine frame, placing tables are arranged on the turntable at equal angles, and crimping type IGBTs are placed on the placing tables. According to the crimping type IGBT test tool, when the placing table rotates to the farthest distance from the detection equipment, the placing table moves to the lowest position, a person places a new crimping type IGBT and takes the crimping type IGBT after the test is completed, the detection equipment tests other crimping type IGBTs at the same time in the taking and placing process, and the IGBTs can be rapidly replaced.

Description

Technical Field

[0001] This utility model relates to the field of IGBT testing technology, specifically a crimp-type IGBT testing fixture. Background Technology

[0002] IGBT, or Insulated Gate Bipolar Transistor, is a composite fully controllable voltage-driven power semiconductor device composed of a bipolar transistor and an insulated gate field-effect transistor. It combines the advantages of high input impedance of MOSFET and low on-state voltage drop of GTR. Press-fit IGBT chips are pressed onto a copper substrate by pressure, and then the copper substrate is fixed to a heat sink by soldering.

[0003] After production, IGBTs require performance testing to ensure they function properly on the market. Typically, crimp-type IGBT testing fixtures use a pull-out placement component to position the IGBT to be tested. After placement, the component needs to be manually or electrically pushed into the testing position. Once testing is complete, the testing device must be stopped, the pull-out component pulled out, and the tested IGBT manually removed. This process prevents rapid IGBT replacement during use, resulting in prolonged downtime for IGBT replacement and hindering continuous IGBT testing. This reduces the speed and efficiency of IGBT testing, making the fixture inefficient and unsuitable for use. Utility Model Content

[0004] The purpose of this invention is to provide a press-fit IGBT testing fixture to solve the problem of slow testing efficiency of current IGBT testing fixtures on the market, as mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crimped IGBT testing fixture, including a frame, a testing device installed inside the frame, and a turntable inside the frame, with a placement platform at equal angles on the turntable for placing the crimped IGBT.

[0006] Preferably, a motor is installed inside the bottom of the frame, and the output end of the motor is fixed to the center position of the bottom of the turntable.

[0007] Preferably, a fixing ring is installed at the bottom inside the frame, and toothed blocks are installed at equal angles on the inner wall of the fixing ring. A connecting rod is installed at the middle position of the bottom of the placement platform.

[0008] Preferably, a limiting plate is installed at an equal angle on the bottom of the turntable, and the limiting plate corresponds one-to-one with the placement platform. A reciprocating lead screw is rotatably connected to the middle of the limiting plate.

[0009] Preferably, a transmission gear is installed at the bottom of the reciprocating lead screw, and the transmission gear meshes with the tooth block.

[0010] Preferably, a limit rod is fixed around the bottom of the placement platform, the limit rod penetrates the interior of the turntable, the lifting distance of the placement platform is less than the length of the limit rod, and the lifting distance of the placement platform is the same as the distance from the top of the placement platform to the bottom of the testing equipment.

[0011] Preferably, the toothed blocks are symmetrically arranged about the center line of the detection device.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The transmission gear meshes with the gear block, and the rotation of the transmission gear causes the reciprocating lead screw to rotate. The rotation of the reciprocating lead screw causes the connecting rod and the placement platform to rise and fall. When the placement platform rotates to the position furthest from the testing equipment, that is, when the placement platform moves to its lowest position, personnel can place new crimped IGBTs and remove crimped IGBTs that have been tested. During the process of picking up and placing, the testing equipment simultaneously tests other crimped IGBTs, enabling rapid IGBT replacement. The downtime for IGBT replacement in the testing device is short, basically achieving continuous IGBT testing and improving the speed and efficiency of IGBT testing. When the placement platform rotates to be directly under the testing equipment, the top of the placement platform is in contact with the testing equipment, allowing the testing equipment to accurately test the IGBTs and improve the accuracy of the test. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a bottom view of the turntable structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of the turntable of this utility model;

[0017] Figure 4 This is a schematic diagram of the transmission gear structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the testing equipment of this utility model.

[0019] In the diagram: 1. Machine frame; 2. Fixing ring; 3. Turntable; 4. Placement platform; 5. Limiting rod; 6. Motor; 7. Gear block; 8. Detection equipment; 9. Connecting rod; 10. Transmission gear; 11. Limiting plate; 12. Reciprocating lead screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5 The present invention provides the following technical solution:

[0022] A crimped IGBT testing fixture includes a frame 1, a testing device 8 installed inside the frame 1, and a turntable 3 inside the frame 1. A placement platform 4 is provided on the turntable 3 at equal angles, and the crimped IGBT is placed on the placement platform 4. A motor 6 is installed at the bottom inside the frame 1, and the output end of the motor 6 is fixed to the center position of the bottom of the turntable 3.

[0023] Power is supplied to the electrical equipment inside the frame 1 that requires electric start-up. The motor 6 drives the turntable 3 to rotate, and the rotation of the turntable 3 causes the placement platform 4 above to rotate synchronously. The crimped IGBT is placed inside the placement platform 4 furthest from the testing equipment 8. The rotation of the turntable 3 causes the placement platform 4 containing the crimped IGBT to rotate to the rear. When the placement platform 4 containing the IGBT rotates to be directly below the testing equipment 8, the testing equipment 8 is now located above the placement platform 4 directly below. Since there are multiple placement platforms 4 on the turntable 3, when the crimped IGBT needs to be removed after testing, the testing equipment 8 simultaneously tests the crimped IGBTs inside other placement platforms 4, which can quickly replace the IGBT. The downtime for replacing IGBTs in the testing device is short, and continuous IGBT testing can be basically achieved.

[0024] A fixing ring 2 is installed at the bottom of the machine frame 1. Tooth blocks 7 are installed at equal angles on the inner wall of the fixing ring 2. A connecting rod 9 is installed at the middle of the bottom of the placement platform 4. A limiting plate 11 is installed at equal angles on the bottom of the turntable 3. The limiting plate 11 corresponds to the placement platform 4. A reciprocating screw 12 is rotatably connected to the middle of the limiting plate 11. A transmission gear 10 is installed at the bottom of the reciprocating screw 12. The transmission gear 10 meshes with the tooth blocks 7. Limiting rods 5 are fixed around the bottom of the placement platform 4. The limiting rods 5 penetrate the interior of the turntable 3. The lifting distance of the placement platform 4 is less than the length of the limiting rods 5. The lifting distance of the placement platform 4 is the same as the distance from the top of the placement platform 4 to the bottom of the testing equipment 8.

[0025] During the rotation of turntable 3, the transmission gear 10 will revolve. When the transmission gear 10 rotates to mesh with the tooth block 7, since the tooth block 7 is fixed on the fixed ring 2, the position of the fixed ring 2 is fixed. During the revolution of the transmission gear 10, the tooth block 7 applies force to the transmission gear 10, causing the transmission gear 10 to rotate on its own axis while revolving. The transmission gear 10 drives the reciprocating screw 12 to rotate synchronously. Due to the setting of the limit rod 5, the placement platform 4 is limited, preventing the placement platform 4 and the connecting rod 9 from rotating with the reciprocating screw 12. The rotation of the reciprocating screw 12 causes the placement platform 4 and the connecting rod 9 to rise and fall. When the placement platform 4 rotates to be directly below the testing equipment 8, the placement platform 4 and the connecting rod 9 are at the highest position, and the top surface of the placement platform 4 is in contact with the bottom of the testing equipment 8, so that the testing results of the testing equipment 8 are accurate. When the placement platform 4 rotates to the farthest position of the testing equipment 8, the placement platform 4 is at the lowest position, which is convenient for personnel to pick up and place the crimped IGBT.

[0026] The toothed blocks 7 are symmetrically arranged about the center line of the detection device 8.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crimping type IGBT test tool, comprising a machine frame (1) in which a detection device (8) is installed, characterized in that, Also include: The inside of the machine frame (1) is provided with a rotating disc (3), the rotating disc (3) is provided with a placing table (4) at equal angles, the placing table (4) is used for placing crimped IGBT.

2. The crimped IGBT test fixture of claim 1, wherein: The bottom of the inside of the machine frame (1) is provided with a motor (6), and the output end of the motor (6) is fixed with the bottom center position of the rotating disc (3).

3. The crimped IGBT test fixture of claim 1, wherein: The bottom of the inside of the machine frame (1) is provided with a fixed ring (2), the inner wall of the fixed ring (2) is provided with a tooth block (7) at equal angles, and the bottom middle position of the placing table (4) is provided with a connecting rod (9).

4. The crimped IGBT test fixture of claim 1, wherein: The bottom of the rotating disc (3) is provided with a limiting plate (11) at equal angles, the limiting plate (11) corresponds to the placing table (4), and the middle of the limiting plate (11) is rotatably connected with a reciprocating screw rod (12).

5. The crimped IGBT test fixture of claim 4, wherein: The bottom of the reciprocating screw rod (12) is provided with a transmission gear (10), and the transmission gear (10) is engaged with the tooth block (7).

6. The crimped IGBT test fixture of claim 1, wherein: The bottom of the placing table (4) is fixedly provided with a limiting rod (5), the limiting rod (5) penetrates the inside of the rotating disc (3), the lifting distance of the placing table (4) is less than the length of the limiting rod (5), and the lifting distance of the placing table (4) is the same as the distance from the top of the placing table (4) to the bottom of the detection equipment (8).

7. The crimped IGBT test fixture of claim 3, wherein: The tooth block (7) is symmetrically arranged about the center line of the detection equipment (8).

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