Clamp device for dynamic and static test of power module

Abstract

The utility model discloses a clamp device for dynamic and static tests of a power module, which relates to the technical field of dynamic and static tests of power modules and comprises a bottom block, supporting plates are fixedly mounted at four corners of the outer surface of the bottom block, a plurality of detection connecting cylinders fixedly penetrate through the upper surface of the bottom block, and a movable block is arranged above the bottom block. An inner frame is fixedly connected to the bottom surface of the movable block, the outer surface of the inner frame is slidably sleeved with the bottom block, positioning telescopic rods are fixedly installed on the bottom surface of the movable block and located on the left side and the right side of the inner frame, and the lower ends of the positioning telescopic rods are fixedly inserted into the upper surface of the bottom block. According to the utility model, the design structure is reasonable, through the cooperation of the air pump installed below the bottom block, the electrifying plate and the air outlet hole arranged on the bottom surface of the detection connecting cylinder, air flow is sprayed out from the air outlet hole, and the air flow blows dust inside the detection connecting cylinder and on the surface of the pin in the concentric hole. And dust is discharged from the upper end of the concentric hole after being separated from the detection connecting cylinder and the pin.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic and static testing of power modules, in particular to a fixture device used for dynamic and static testing of power modules. Background Art

[0002] The power module is a power electronic device that is packaged into a module according to a certain functional combination. The intelligent power module is an advanced hybrid integrated power component with IGBT as the core, consisting of a high-speed, low-power die (IGBT) and an optimized gate drive circuit, as well as a fast protection circuit. The IGBT die in the IPM is of high-speed type, and the drive circuit is close to the IGBT, with a small drive delay, so the IPM has a fast switching speed and low loss.

[0003] The power module is generally connected by pins when in use. Before the power module is used, it will be subjected to dynamic and static tests. During the test, the pins of the power module will be supported and limited by the fixture device, and then the pins will be inserted into the detection connection structure inside the fixture to detect the power module. However, when the fixture is not in use, dust will accumulate inside, and the pins of the power module will also be contaminated with dust during the transfer of the power module in the external space, which will affect the detection accuracy of the power module. To this end, we provide a fixture device for dynamic and static testing of power modules to solve the above problems. Utility Model Content

[0004] 1) Technical issues solved

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a fixture device for dynamic and static testing of a power module.

[0006] 2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture device for dynamic and static testing of power modules, comprising a bottom block, support plates are fixedly installed at the four corners of the outer surface of the bottom block, a plurality of detection connection cylinders are fixedly penetrated through the upper surface of the bottom block, a movable block is arranged above the bottom block, the bottom surface of the movable block is fixedly connected to an inner frame, the bottom block is slidably sleeved on the outer surface of the inner frame, positioning telescopic rods are fixedly installed on the bottom surface of the movable block and on the left and right sides of the inner frame, the lower ends of the positioning telescopic rods are fixedly plugged into the upper surface of the bottom block, the upper surface of the bottom block and above each detection connection cylinder are provided with concentric holes, and the interior of the bottom block is The bottom surface of the bottom block is hollow, and an air pump is fixedly connected to the bottom surface of the bottom block. Two power contact rods A are installed on the outer surface of the air pump. A power supply is installed on the bottom surface of the bottom block. Two power contact rods B are installed on the front of the power supply. The two power contact rods A are respectively located in front of the two power contact rods B. A push plate is fixedly connected to the bottom surface of the inner frame, and a sleeve plate is arranged below the push plate. The sleeve plate and the bottom surface of the bottom block are elastically connected by a tension telescopic rod. Power-on plates are arranged behind the two power contact rods A. The two power-on plates are respectively located in front of the two power contact rods B. The two power-on plates are fixedly connected to the inside of the sleeve plate, and the inner bottom wall of the detection connecting tube is provided with an air outlet hole connected to the inside of the bottom block.

[0008] Furthermore, the concentric hole is coaxially arranged with the detection connecting cylinder located below, and a plurality of grooves are formed on the inner annular surface of the concentric hole.

[0009] Furthermore, the groove is in a spiral shape, and a plurality of grooves are distributed in a circular array around the axis of the concentric hole.

[0010] Furthermore, a concentric ring is fixedly inserted at the upper end of the concentric hole, and the inner diameter of the concentric ring is equal to the inner diameter of the detection connecting tube.

[0011] Furthermore, the minimum distance between the power contact rod A and the power contact rod B is equal to the maximum thickness of the current-carrying plate, and the two power contact rods A are coaxially arranged with the two power contact rods B respectively.

[0012] Furthermore, side panels are provided on both the left and right sides of the bottom block, the upper ends of the side panels are fixedly connected to the movable block, and the lower ends of the side panels are slidably penetrated by a stopper.

[0013] Furthermore, the upper surface of one end of the block close to the axis of the bottom block has a rounded corner, the distance between the upper surface of the block and the bottom surface of the movable block is equal to the height of the bottom block, the end of the block close to the axis of the bottom block is bent downward, the lower end of the side plate close to the bottom surface of the bottom block is a concave structure, the concave structure of the side plate is equal to the thickness of the block bent downward, and the end of the block away from the bottom block is a large block end.

[0014] 3) Beneficial effects:

[0015] Compared with the prior art, the fixture device for dynamic and static testing of power modules has the following beneficial effects:

[0016] 1. The utility model cooperates with an air pump installed below the bottom block, a power-on plate and an air outlet hole opened on the bottom surface of the detection connection tube. When the pin is inserted into the concentric hole, the movable block is pushed close to the bottom block. The inner frame pushes the sleeve plate downward through the push plate, so that the power-on plate is connected with the power contact rod A and the power contact rod B. The air pump is started to inflate air into the bottom block, and the air flow is ejected from the air outlet hole. The air flow blows the dust inside the detection connection tube and on the surface of the pin in the concentric hole, so that the dust is separated from the detection connection tube and the pin and discharged from the upper end of the concentric hole.

[0017] Second, the utility model cooperates with the installation side plate and the stopper, after the movable block is pushed downward to contact the bottom block, the stopper is pushed to move below the bottom block, so that the movable block will not move upward and reset under the push of the positioning telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the bottom block of the utility model;

[0020] Figure 3 It is a schematic diagram of the partial structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection between the push plate and the inner frame of the utility model;

[0022] Figure 5 It is a right side schematic diagram of part of the structure of the utility model;

[0023] Figure 6 For this utility model Figure 4 A schematic diagram of the enlarged structure in the middle.

[0024] In the figure: 1. bottom block; 2. support plate; 3. detection connecting tube; 4. movable block; 5. inner frame; 6. positioning telescopic rod; 7. electric contact rod A; 8. air pump; 9. concentric hole; 10. power supply; 11. electric contact rod B; 12. sleeve plate; 13. tension telescopic rod; 14. push plate; 15. air outlet; 16. power plate; 17. groove; 18. concentric ring; 19. side plate; 20. stopper. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-6 As shown, the utility model provides a technical solution: a fixture device for dynamic and static testing of power modules, comprising a bottom block 1, support plates 2 are fixedly installed at the four corners of the outer surface of the bottom block 1, a plurality of detection connection tubes 3 are fixedly penetrated through the upper surface of the bottom block 1, and the detection connection tubes 3 are connected to the detection structure, a movable block 4 is arranged above the bottom block 1, an inner frame 5 is fixedly connected to the bottom surface of the movable block 4, the bottom block 1 is slidably sleeved on the outer surface of the inner frame 5, and positioning telescopic rods 6 are fixedly installed on the bottom surface of the movable block 4 and on the left and right sides of the inner frame 5, the positioning telescopic rods 6 have a tendency to push the movable block 4 away from the bottom block 1, and the lower ends of the positioning telescopic rods 6 are fixedly plugged into the upper surface of the bottom block 1 A concentric hole 9 is provided on the upper surface of the bottom block 1 and above each detection connection tube 3. The concentric hole 9 is coaxially arranged with the detection connection tube 3 located below. A plurality of grooves 17 are provided on the inner annular surface of the concentric hole 9. The shape of the groove 17 is spiral. The spiral groove 17 causes the airflow to rotate when it flows, thereby increasing the dust cleaning capability. The plurality of grooves 17 are distributed in a circular array along the axis of the concentric hole 9. A concentric ring 18 is fixedly connected to the upper end of the concentric hole 9. The inner diameter of the concentric ring 18 is equal to the inner diameter of the detection connection tube 3. The concentric ring 18 ensures that the pin is coaxial with the detection connection tube 3 when inserted into the concentric hole 9, so that the pin is convenient to be inserted into the detection connection tube 3 after passing through the concentric hole 9.

[0027] The interior of the bottom block 1 is in the shape of a cavity, an air pump 8 is fixedly plugged into the bottom surface of the bottom block 1, two power contact rods A7 are installed on the outer surface of the air pump 8, a power supply 10 is installed on the bottom surface of the bottom block 1, two power contact rods B11 are installed on the front of the power supply 10, and the two power contact rods A7 are respectively located in front of the two power contact rods B11, a push plate 14 is fixedly connected to the bottom surface of the inner frame 5, a sleeve plate 12 is arranged below the push plate 14, and the sleeve plate 12 is elastically connected to the bottom surface of the bottom block 1 through a tension telescopic rod 13, and a power-on plate 16 is arranged behind the two power contact rods A7, and the two power-on plates 16 are respectively located in front of the two power contact rods B11, and the minimum distance between the power contact rod A7 and the power contact rod B11 is equal. Due to the maximum thickness of the power-on plate 16, the two power-on contact rods A7 are coaxially arranged with the two power-on contact rods B11 respectively. When the movable block 4 and the bottom block 1 are at the maximum distance, the power-on plate 16 is located above the power-on contact rod A7, and the power supply 10 does not energize the air pump 8. When the push plate 14 pushes the power-on plate 16 downward, the power-on plate 16 will contact the power-on contact rod A7 and the power-on contact rod B11, so that the power supply 10 can energize the air pump 8. When the movable block 4 contacts the bottom block 1, the power-on plate 16 stops energizing the air pump 8 by moving to the bottom of the power-on contact rod A7. The two power-on plates 16 are fixedly inserted into the inside of the sleeve plate 12, and the inner bottom wall of the detection connecting tube 3 is provided with an air outlet 15 connected to the inside of the bottom block 1.

[0028] The left and right sides of the bottom block 1 are provided with side panels 19, the upper ends of the side panels 19 are fixedly connected to the movable block 4, and the lower ends of the side panels 19 are slidably penetrated by a stopper 20, and the upper surface of the end of the stopper 20 close to the axis of the bottom block 1 has a rounded corner, which is convenient for pushing the stopper 20 to the bottom of the bottom block 1, and the distance between the upper surface of the stopper 20 and the bottom surface of the movable block 4 is equal to the height of the bottom block 1, and the end of the stopper 20 close to the axis of the bottom block 1 is bent downward, and the lower end of the side panel 19 close to the bottom surface of the bottom block 1 is a concave structure, and the concave structure of the side panel 19 is equal to the thickness of the downward bending of the stopper 20, when the bent end of the stopper 20 is pulled to contact the side panel 19, the stopper 20 is flush with the side surface of the bottom block 1, so that the movable block 4 can be separated from the bottom block 1, and the end of the stopper 20 away from the bottom block 1 is a large block end, which prevents the stopper 20 from being separated from the side panel 19.

[0029] Working principle: In the initial state, the positioning telescopic rod 6 pushes the movable block 4 to the top, at which time the power-on plate 16 is located above the power contact rod A7 and the power contact rod B11, and the power supply 10 does not energize the air pump 8. When testing the power module, the pins of the power module are inserted into the concentric holes 9 through the concentric rings 18, and the movable block 4 is pushed to gradually compress the positioning telescopic rod 6 and move downward. The inner frame 5 pushes the sleeve plate 12 downward through the push plate 14, so that the power-on plate 16 is connected with the power contact rod A7 and the power contact rod B11, and the air pump 8 is started to charge the bottom block 1. Air is ejected from the air outlet 15, and the air flow blows the dust on the surface of the pin inside the detection connection tube 3 and the concentric hole 9. Then the dust is discharged from the upper end of the concentric hole 9 through the spiral groove 17 driven by the air flow. When the movable block 4 continues to move downward, the pin is inserted into the detection connection tube 3, and at the same time, the power-on plate 16 moves to the bottom of the power contact rod A7 and the power contact rod B11, the power supply 10 stops supplying power to the air pump 8, and after the movable block 4 contacts with the bottom block 1, it pushes the stopper 20 to move to the bottom of the bottom block 1, so that the pin is stably inserted into the detection connection tube 3 for detection.

Claims

1. A fixture device for dynamic and static testing of a power module, comprising a bottom block (1), characterized in that: The outer surface of the bottom block (1) is fixedly provided with support plates (2) at four corners, the upper surface of the bottom block (1) is fixedly penetrated with a plurality of detection connection tubes (3), a movable block (4) is arranged above the bottom block (1), the bottom surface of the movable block (4) is fixedly connected with an inner frame (5), the bottom block (1) is slidably sleeved on the outer surface of the inner frame (5), the bottom surface of the movable block (4) and the left and right sides of the inner frame (5) are fixedly provided with positioning telescopic rods (6), the lower ends of the positioning telescopic rods (6) are fixedly plugged into the upper surface of the bottom block (1), the upper surface of the bottom block (1) and above each detection connection tube (3) are provided with concentric holes (9), the interior of the bottom block (1) is in the shape of a cavity, an air pump (8) is fixedly plugged into the bottom surface of the bottom block (1), and two electric contact rods are installed on the outer surface of the air pump (8) A (7), a power supply (10) is installed on the bottom surface of the bottom block (1), two power contact rods B (11) are installed on the front of the power supply (10), and the two power contact rods A (7) are respectively located in front of the two power contact rods B (11), the bottom surface of the inner frame (5) is fixedly connected with a push plate (14), a sleeve plate (12) is arranged below the push plate (14), the sleeve plate (12) and the bottom surface of the bottom block (1) are elastically connected through a tension telescopic rod (13), and a power supply plate (16) is arranged behind the two power contact rods A (7), and the two power supply plates (16) are respectively located in front of the two power contact rods B (11), and the two power supply plates (16) are fixedly plugged into the inside of the sleeve plate (12), and the inner bottom wall of the detection connection cylinder (3) is provided with an air outlet (15) connected with the inside of the bottom block (1).

2. A fixture device for dynamic and static testing of a power module according to claim 1, characterized in that: The concentric hole (9) is coaxially arranged with the detection connection cylinder (3) located below, and a plurality of grooves (17) are formed on the inner annular surface of the concentric hole (9).

3. A fixture device for dynamic and static testing of a power module according to claim 2, characterized in that: The groove (17) is in a spiral shape, and a plurality of grooves (17) are distributed in an array around the axis of the concentric hole (9).

4. The fixture device for dynamic and static testing of a power module according to claim 2, characterized in that: A concentric ring (18) is fixedly inserted into the upper end of the concentric hole (9), and the inner diameter of the concentric ring (18) is equal to the inner diameter of the detection connecting tube (3).

5. The fixture device for dynamic and static testing of a power module according to claim 1, characterized in that: The minimum distance between the power contact rod A (7) and the power contact rod B (11) is equal to the maximum thickness of the current-carrying plate (16), and the two power contact rods A (7) are coaxially arranged with the two power contact rods B (11) respectively.

6. The fixture device for dynamic and static testing of a power module according to claim 1, characterized in that: The left and right sides of the bottom block (1) are both provided with side plates (19), the upper ends of the side plates (19) are fixedly connected to the movable block (4), and the lower ends of the side plates (19) are slidably penetrated by a stopper (20).

7. A fixture device for dynamic and static testing of a power module according to claim 6, characterized in that: The upper surface of one end of the stopper (20) close to the axis of the bottom block (1) is rounded, the distance between the upper surface of the stopper (20) and the bottom surface of the movable block (4) is equal to the height of the bottom block (1), the end of the stopper (20) close to the axis of the bottom block (1) is bent downward, the lower end of the side plate (19) close to the bottom surface of the bottom block (1) is a concave structure, the concave structure of the side plate (19) is equal to the thickness of the downwardly bent stopper (20), and the end of the stopper (20) away from the bottom block (1) is a large block end.

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