MLCC capacitor testing device

Abstract

The utility model relates to the technical field of test protection, and discloses an MLCC capacitor testing device comprising a pedestal, the upper surface of the pedestal is fixedly connected with a motor, the driving end of the motor is fixedly connected with a gear, the upper surface of the pedestal is rotatably connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a gear ring, and the outer wall of the rotating shaft is fixedly connected with a rotating shaft. The gear is meshed with the gear ring, a rotating disc is fixedly connected to the upper surface of the rotating shaft, a plurality of capacitors are arranged in the rotating disc, a hinge block is fixedly connected to the inner wall of the rotating disc, an electric push rod is rotationally connected to the inner wall of the hinge block, and a supporting block is fixedly connected to the driving end of the electric push rod. According to the utility model, capacitors are placed in the plurality of grooves in the turntable, so that the capacitors can be conveniently detected, and the electric push rods connected with the hinge blocks in the grooves push the connecting blocks to drive the pressing plates to clamp and fix the capacitors.

Description

Technical Field

[0001] This utility model relates to the field of testing and protection technology, and in particular to an MLCC capacitor testing device. Background Technology

[0002] MLCC (Multilayer Ceramic Capacitor) is one of the main passive surface-mount components in electronic devices. In addition to the general characteristics of capacitors that "block DC and pass AC", MLCCs also have the advantages of small size, large specific capacitance, long life, high reliability, and suitability for surface mounting. With the improvement of the reliability and integration of surface-mount capacitors, their application range is becoming wider and wider, and they are widely used in various military and civilian electronic devices. In circuit applications, if MLCCs fail and cannot provide sufficient effective capacitance, it will lead to adverse phenomena such as reduced energy storage capacity, increased impedance, and poor decoupling effect. Therefore, it is necessary to test the capacitors before they are put into use.

[0003] CN215180570U discloses a capacitance testing device, which includes a fixture, an upper contact assembly, a lower contact assembly, and a lifting drive mechanism. The fixture has multiple placement holes for placing capacitors. The upper contact assembly includes an upper probe plate and upper probes mounted on the upper probe plate, each corresponding to a placement hole. The lower contact assembly includes a lower probe plate and lower probes mounted on the lower probe plate, each corresponding to a placement hole. The lower probes contact the downward-facing electrodes of the capacitors in their respective placement holes. The lifting drive mechanism is connected to the upper probe plate to drive the upper probe plate down so that the upper probes contact the upward-facing electrodes of the capacitors in their respective placement holes. This invention can test multiple capacitors simultaneously, with a high degree of automation and high testing efficiency. This invention enables automatic and continuous testing. The pressure head assembly can press against the electrical module before testing to simulate the actual usage environment and improve detection accuracy. However, in this application, when the capacitor is placed inside the base, the bottom of the capacitor is not fixed. During turntable testing, the unstable capacitor fixation affects the alignment of the measuring head, leading to a decrease in testing effectiveness and speed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an MLCC capacitance testing device, which aims to improve the problem that when the capacitor is placed inside the base, the bottom of the capacitor is not fixed, and the unstable fixing of the capacitor during turntable testing affects the alignment of the measuring head, resulting in poor testing effect and speed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an MLCC capacitor testing device, comprising a base, a motor fixedly connected to the upper surface of the base, a gear fixedly connected to the drive end of the motor, a rotating shaft rotatably connected to the upper surface of the base, a gear ring fixedly connected to the outer wall of the rotating shaft, the gear and the gear ring meshing, a turntable fixedly connected to the upper surface of the rotating shaft, a plurality of capacitors disposed inside the turntable, a hinge block fixedly connected to the inner wall of the turntable, an electric push rod rotatably connected to the inner wall of the hinge block, a support block fixedly connected to the drive end of the electric push rod, a pressure plate fixedly connected to the outer wall of the support block, one end of a spring fixedly connected to the outer wall of the pressure plate, the other end of the spring fixedly connected to the inside of the turntable, the outer wall of the pressure plate fitting against the outer wall of the capacitor, and a drive assembly disposed on the upper surface of the base.

[0006] With the above technical solution, the capacitor is placed in multiple grooves within the turntable for easy testing. An electric push rod, connected by a hinge block, pushes the connecting block and pressure plate to clamp and fix the capacitor, ensuring its stability during testing. A starter motor drives a gear to rotate, which in turn drives a gear ring, which in turn drives the rotating shaft and turntable, thereby improving the efficiency of capacitor testing.

[0007] Furthermore, the drive assembly includes a bracket, the lower surface of which is fixedly connected to the upper surface of the base, an electric slide rail is fixedly connected to the outer wall of the bracket, and an electric slider is slidably connected to the outer wall of the electric slide rail.

[0008] The above technical solution uses an electric slide rail to move the electric slider up and down.

[0009] Furthermore, a support plate is fixedly connected to the upper surface of the electric slider, a pressure block is fixedly connected inside the support plate, a probe is provided on the left side of the outer wall of the pressure block, a test head is provided on the right side of the outer wall of the pressure block, and the upper surfaces of the test head and the probe are fixedly connected to the lower surface of the support plate.

[0010] The above technical solution uses a differential DC charging method for the test head, taking the capacitance value of a standard capacitor module as a reference. Through the cooperation between the test head and the probe, the capacitance of the MLCC capacitor is tested.

[0011] Furthermore, a support frame is provided inside the turntable, the lower surface of the support frame is fixedly connected to the upper surface of the base, a storage box is fixedly connected inside the support frame, an air pump is fixedly connected to the upper surface of the storage box, the drive end of the air pump is fixedly connected to an air guide pipe, and the outer wall of the air guide pipe is fixedly connected to the inside of the storage box.

[0012] Using the above technical solution, the air pump is started to deliver gas into the storage tank through the air pipe.

[0013] Furthermore, the outer wall of the storage box is fixedly connected with symmetrical conveying pipes, the outer wall of the conveying pipes is fixedly connected with connecting pipes, and the top end of the connecting pipes is fixedly connected with centrally symmetrical nozzles, the outer wall of the nozzles being positioned above the capacitor.

[0014] The above technical solution involves introducing the gas inside the storage tank into the interior of the connecting pipe via the storage tank.

[0015] Furthermore, a constant temperature heater is fixedly connected to the outer wall of the storage box, a cooling surface of a semiconductor refrigeration chip is fixedly connected to the top of the storage box, and multiple heat dissipation plates are fixedly connected to the heating surface of the semiconductor refrigeration chip.

[0016] The above technical solution involves activating a constant-temperature heater to heat the gas inside the storage tank.

[0017] Furthermore, a symmetrical mounting plate is fixedly connected to the upper surface of the base, and a robotic arm is rotatably connected to the upper surface of the mounting plate. A connector is fixedly connected to the drive end of the robotic arm.

[0018] The above technical solution uses a mounting plate to support and fix the robotic arm.

[0019] Furthermore, a connecting block is fixedly connected to the lower surface of the connector, and symmetrical electric telescopic rods are fixedly connected to the outer wall of the connecting block. A clamping plate is fixedly connected to the driving end of the electric telescopic rod.

[0020] The above technical solution uses an electric push rod connected to the starter block to move the clamping plate.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the capacitor is first placed inside multiple grooves in the turntable to facilitate the testing of each capacitor. The electric push rod connected by the hinge block inside the groove pushes the connecting block with the pressure plate to clamp and fix the capacitor, so that the capacitor can remain stable during subsequent testing. The motor is started to rotate the gear, which in turn rotates the gear ring, which in turn rotates the rotating shaft and the turntable, thereby improving the efficiency of capacitor testing and enhancing the stability of the testing device for capacitor testing.

[0023] 2. In this invention, the test head adopts a differential DC charging method, using the capacitance value of a standard capacitor module as a reference. Through the cooperation between the test head and the probe, the capacitance of the MLCC capacitor is tested. By starting the air pump, gas is introduced into the storage tank through the air guide tube. The gas inside the storage tank is heated by starting the constant temperature heater, or cooled by starting the semiconductor cooling chip. Then, the air inside the storage tank is introduced into the connecting pipe through the delivery pipe, and then the gas is sprayed out through the nozzle. By spraying out high-temperature gas or cooled gas, the temperature of the capacitor is changed, which facilitates the testing of capacitor test results under the influence of different temperatures and improves the functionality of the testing device. Attached Figure Description

[0024] Figure 1 This is a front view of an MLCC capacitor testing device proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the turntable of an MLCC capacitor testing device proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the capacitor section of an MLCC capacitance testing device proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the support structure of an MLCC capacitor testing device proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the mounting plate structure of an MLCC capacitor testing device proposed in this utility model.

[0029] Legend:

[0030] 1. Base; 2. Motor; 3. Gear; 4. Shaft; 5. Gear ring; 6. Turntable; 7. Capacitor; 8. Hinge block; 9. Electric push rod; 10. Support block; 11. Pressure plate; 12. Spring; 13. Storage box; 14. Air pump; 15. Air guide pipe; 16. Delivery pipe; 17. Connecting pipe; 18. Nozzle; 19. Semiconductor cooling chip; 20. Constant temperature heater; 21. Bracket; 22. Electric slide rail; 23. Electric slider; 24. Support plate; 25. Pressure block; 26. Test head; 27. Probe; 28. Mounting plate; 29. ​​Robotic arm; 30. Connector; 31. Connecting block; 32. Electric telescopic rod; 33. Clamping plate; 34. Support frame. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1-3 This utility model provides an embodiment of an MLCC capacitor testing device, comprising a base 1, a motor 2 fixedly connected to the upper surface of the base 1, a gear 3 fixedly connected to the drive end of the motor 2, a rotating shaft 4 rotatably connected to the upper surface of the base 1, a gear ring 5 fixedly connected to the outer wall of the rotating shaft 4, the gear 3 and the gear ring 5 meshing, a turntable 6 fixedly connected to the upper surface of the rotating shaft 4, a plurality of capacitors 7 disposed inside the turntable 6, a hinge block 8 fixedly connected to the inner wall of the turntable 6, an electric push rod 9 rotatably connected to the inner wall of the hinge block 8, a support block 10 fixedly connected to the drive end of the electric push rod 9, a pressure plate 11 fixedly connected to the outer wall of the support block 10, one end of a spring 12 fixedly connected to the outer wall of the pressure plate 11, the other end of the spring 12 fixedly connected to the inside of the turntable 6, the outer wall of the pressure plate 11 fitting against the outer wall of the capacitors 7, and a drive assembly disposed on the upper surface of the base 1.

[0033] Specifically, the electric push rod 9 is connected to the hinge block 8 inside the turntable 6. When the electric push rod 9 is powered on, the support block 10 moves with the extension and retraction of the electric push rod 9. The movement of the support block 10 causes the pressure plate 11 to clamp and fix the capacitor 7 inside the turntable 6, thereby improving the stability of the capacitor 7. After the capacitor 7 is fixed, the motor 2 is started, causing the gear 3 to start rotating. The rotation of the gear 3 drives the meshing gear ring 5 to rotate, which in turn pushes the rotating shaft 4 to rotate on the upper surface of the base 1. The rotation of the rotating shaft 4 causes the turntable 6 and the placed capacitor 7 to rotate together, ensuring the stability of the capacitor 7 during the test.

[0034] Reference Figure 2 and Figure 4The drive assembly includes a bracket 21, the lower surface of which is fixedly connected to the upper surface of the base 1. An electric slide rail 22 is fixedly connected to the outer wall of the bracket 21, and an electric slider 23 is slidably connected to the outer wall of the electric slide rail 22. A support plate 24 is fixedly connected to the upper surface of the electric slider 23. A pressure block 25 is fixedly connected inside the support plate 24. A probe 27 is disposed on the left side of the outer wall of the pressure block 25, and a test head 26 is disposed on the right side of the outer wall of the pressure block 25. The upper surfaces of the test head 26 and the probe 27 are fixedly connected to the lower surface of the support plate 24. A support frame 34 is disposed inside the turntable 6, the lower surface of which is fixedly connected to the upper surface of the base 1. A storage box 13 is fixedly connected inside the support frame 34. The upper surface of the storage box 13... An air pump 14 is fixedly connected to the storage tank 13. The drive end of the air pump 14 is fixedly connected to the air guide pipe 15. The outer wall of the air guide pipe 15 is fixedly connected to the inside of the storage tank 13. The outer wall of the storage tank 13 is fixedly connected to a left-right symmetrical delivery pipe 16. The outer wall of the delivery pipe 16 is fixedly connected to a connecting pipe 17. The top end of the connecting pipe 17 is fixedly connected to a centrally symmetrical nozzle 18. The outer wall of the nozzle 18 is located above the capacitor 7. The outer wall of the storage tank 13 is fixedly connected to a constant temperature heater 20. The top end of the storage tank 13 is fixedly connected to the cooling surface of a semiconductor refrigeration chip 19. The constant temperature heater 20 is an electromagnetic heater. The heating surface of the semiconductor refrigeration chip 19 is fixedly connected to multiple heat sinks. The semiconductor refrigeration chip 19 is specifically a semiconductor thermoelectric refrigeration chip.

[0035] Specifically, next, the electric slide rail 22 is activated, causing the electric slider 23 to move downwards along with the support plate 24. The downward movement of the support plate 24 causes the pressure plate 11 to clamp and fix the capacitor 7 inside the turntable 6. At the same time, the probe 27 contacts the capacitor 7 and transmits a signal to the test head 26, preparing for subsequent testing. During the testing of the capacitor 7, the air pump 14 is activated to introduce gas into the storage tank 13. Then, the constant temperature heater 20 is activated to heat the air inside the storage tank 13, and the heated air is discharged into the connecting pipe 17 through the delivery pipe 16. Finally, the heated air is discharged through multiple nozzles 18 to heat up the capacitor 7. In addition, the semiconductor cooling chip 19 can be activated to cool the air inside the storage tank 13. The cooled air is discharged into the connecting pipe 17 through the delivery pipe 16 and finally discharged through multiple nozzles 18 to cool down the capacitor 7. In this way, the capacitor 7 is tested at different temperatures, improving the convenience and accuracy of the test.

[0036] Reference Figure 1 and Figure 5The upper surface of the base 1 is fixedly connected to a mounting plate 28 that is symmetrically arranged on the left and right. The upper surface of the mounting plate 28 is rotatably connected to a robotic arm 29. The drive end of the robotic arm 29 is fixedly connected to a connector 30. The lower surface of the connector 30 is fixedly connected to a connecting block 31. The outer wall of the connecting block 31 is fixedly connected to a symmetrically arranged electric telescopic rod 32. The drive end of the electric telescopic rod 32 is fixedly connected to a clamping plate 33.

[0037] Specifically, the electric telescopic rod 32 is connected to the clamping plate 33 via the connecting block 31 to clamp the capacitor 7. Then, using the connector 30 connected by the connecting block 31, the fixed capacitor 7 is placed into the groove inside the turntable 6 under the action of the robotic arm 29, thereby achieving convenient and quick feeding.

[0038] Working principle: When the testing device is needed, the electric telescopic rod 32 connected by the connecting block 31 first clamps the capacitor 7 with the clamping plate 33. The connector 30 connected by the connecting block 31, through the action of the robotic arm 29, places the fixed capacitor 7 into the groove inside the turntable 6, facilitating loading. The motor 2 is started, driving the gear 3 to rotate. The gear 3 drives the meshing gear ring 5 to rotate. The gear ring 5 drives the rotating shaft 4 to rotate on the upper surface of the base 1. The rotating shaft 4 drives the turntable 6 and the placed capacitor 7 to rotate. The electric push rod 9 connected by the hinge block 8 inside the turntable 6 pushes the support block 10. The movement of the support block 10 causes the pressure plate 11 to clamp and fix the capacitor 7 inside the turntable 6, improving the stability of the capacitor 7. The electric slide rail 22 is started, causing the electric slider 23 to move downward with the support plate 24. The downward movement of the support plate 24 moves the pressure block... First, probe 27 contacts capacitor 7, transmitting a signal to test head 26. Finally, test head 26 is used to test capacitor 7. During testing, air pump 14 is activated, introducing gas into storage tank 13 via air guide tube 15. Constant temperature heater 20 is activated to heat the air inside storage tank 13, which is then discharged through delivery tube 16 into connecting tube 17 and finally exited through multiple nozzles 18 to heat capacitor 7 before testing via test head 26. Alternatively, semiconductor cooling chip 19 can be activated to cool the air inside storage tank 13, which is then discharged through delivery tube 16 into connecting tube 17 and finally exited through multiple nozzles 18, achieving the effect of cooling capacitor 7 before testing via test head 26. This facilitates testing capacitor 7 at different temperatures.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A MLCC capacitor testing device, comprising a base (1), characterized in that: A motor (2) is fixedly connected to the upper surface of the base (1), a gear (3) is fixedly connected to the drive end of the motor (2), a rotating shaft (4) is rotatably connected to the upper surface of the base (1), a gear ring (5) is fixedly connected to the outer wall of the rotating shaft (4), the gear (3) and the gear ring (5) mesh with each other, a turntable (6) is fixedly connected to the upper surface of the rotating shaft (4), a plurality of capacitors (7) are arranged inside the turntable (6), and a hinge block (8) is fixedly connected to the inner wall of the turntable (6). An electric push rod (9) is rotatably connected to the inner wall of the hinge block (8). A support block (10) is fixedly connected to the drive end of the electric push rod (9). A pressure plate (11) is fixedly connected to the outer wall of the support block (10). One end of a spring (12) is fixedly connected to the outer wall of the pressure plate (11). The other end of the spring (12) is fixedly connected to the inside of the turntable (6). The outer wall of the pressure plate (11) is in contact with the outer wall of the capacitor (7). A drive assembly is provided on the upper surface of the base (1).

2. The MLCC capacitance testing device according to claim 1, characterized in that: The drive assembly includes a bracket (21), the lower surface of which is fixedly connected to the upper surface of the base (1), and an electric slide rail (22) is fixedly connected to the outer wall of the bracket (21). An electric slider (23) is slidably connected to the outer wall of the electric slide rail (22).

3. The MLCC capacitance testing device according to claim 2, characterized in that: A support plate (24) is fixedly connected to the upper surface of the electric slider (23). A pressure block (25) is fixedly connected inside the support plate (24). A probe (27) is provided on the left side of the outer wall of the pressure block (25). A test head (26) is provided on the right side of the outer wall of the pressure block (25). The upper surfaces of the test head (26) and the probe (27) are fixedly connected to the lower surface of the support plate (24).

4. The MLCC capacitance testing device according to claim 1, characterized in that: The turntable (6) is provided with a support frame (34) inside. The lower surface of the support frame (34) is fixedly connected to the upper surface of the base (1). The support frame (34) is fixedly connected to a storage box (13) inside. The upper surface of the storage box (13) is fixedly connected to an air pump (14). The drive end of the air pump (14) is fixedly connected to an air guide pipe (15). The outer wall of the air guide pipe (15) is fixedly connected to the inside of the storage box (13).

5. The MLCC capacitance testing device according to claim 4, characterized in that: The outer wall of the storage box (13) is fixedly connected with a left-right symmetrical conveying pipe (16), the outer wall of the conveying pipe (16) is fixedly connected with a connecting pipe (17), the top end of the connecting pipe (17) is fixedly connected with a centrally symmetrical nozzle (18), and the outer wall of the nozzle (18) is located above the capacitor (7).

6. The MLCC capacitance testing device according to claim 4, characterized in that: The outer wall of the storage box (13) is fixedly connected to a constant temperature heater (20), the top of the storage box (13) is fixedly connected to the cooling surface of a semiconductor refrigeration chip (19), and the heating surface of the semiconductor refrigeration chip (19) is fixedly connected to multiple heat dissipation plates.

7. The MLCC capacitance testing device according to claim 1, characterized in that: The upper surface of the base (1) is fixedly connected to a mounting plate (28) that is symmetrical on the left and right. The upper surface of the mounting plate (28) is rotatably connected to a robotic arm (29). The drive end of the robotic arm (29) is fixedly connected to a connector (30).

8. The MLCC capacitance testing device according to claim 7, characterized in that: A connecting block (31) is fixedly connected to the lower surface of the connector (30), and a left-right symmetrical electric telescopic rod (32) is fixedly connected to the outer wall of the connecting block (31). A clamping plate (33) is fixedly connected to the driving end of the electric telescopic rod (32).

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