A fixture for testing the leakage current of aluminum electrolytic capacitors
By introducing anti-slip rubber beads and adjustment components into the fixture of the aluminum electrolytic capacitor leakage current tester, the problems of unstable contact and poor applicability have been solved, achieving higher accuracy and wider adaptability for capacitor testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MIANYANG HIGH TECH ZONE ZIJIANG ELECTRONIC COMPONENTS CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
The electrode and pin contact of the existing aluminum electrolytic capacitor leakage current tester fixture is unstable, resulting in large fluctuations in test data. It is also difficult to adapt to the testing requirements of capacitors of different specifications, which increases the cost of equipment procurement and maintenance.
A fixture for testing the leakage current of aluminum electrolytic capacitors was designed. Anti-slip rubber beads were added to improve clamping stability, and the distance and height of the fixed clamp and the elastic clamp mechanism were adjusted by control and adjustment components to accommodate capacitors of different sizes.
This improved the accuracy of test results and the applicability of fixtures, while reducing equipment procurement and maintenance costs.
Smart Images
Figure CN224286954U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitor technology, specifically to a fixture for an aluminum electrolytic capacitor leakage current tester. Background Technology
[0002] Aluminum electrolytic capacitors are made by inserting a bent aluminum strip as the positive electrode, with an aluminum cylinder as the negative electrode and filled with liquid electrolyte. They also require DC voltage treatment to form an oxide film on the positive electrode as the dielectric. During production, aluminum electrolytic capacitors undergo current-carrying performance testing. This testing involves clamping the positive and negative leads of the aluminum electrolytic capacitor with the positive and negative clamps of an LCR (Liquidity Regulator) tester and then conducting the current test. The leakage current tester fixture, as a key component connecting the aluminum electrolytic capacitor and the testing instrument, directly affects the accuracy and reliability of the test results.
[0003] The contact method between the electrodes and the pins of existing fixtures is not stable enough, which can easily lead to poor contact, resulting in large fluctuations in test data and affecting test accuracy. On the other hand, aluminum electrolytic capacitors of different specifications have different sizes and pin spacings, while existing fixtures have poor versatility and cannot meet the testing needs of various capacitor specifications, increasing the equipment procurement and maintenance costs for enterprises. Therefore, we need to propose a fixture for an aluminum electrolytic capacitor leakage current tester. Utility Model Content
[0004] The purpose of this utility model is to provide a clamp for an aluminum electrolytic capacitor leakage current tester. The distance between two sets of fixed clamps is controlled by a control component, and several sets of anti-slip rubber beads are set to improve the stability of the capacitor clamping. The height of the elastic clamp mechanism and the distance between the two sets of elastic clamp mechanisms are adjusted by an adjustment component to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixture for an aluminum electrolytic capacitor leakage current tester, comprising a test platform, an LCR tester, a fixing clamp, a mounting frame, and an elastic clamp mechanism, wherein the fixing clamp, the mounting frame, and the elastic clamp mechanism are each provided in two sets;
[0006] Among them, the corresponding surfaces of the two sets of fixing clamps are provided with several sets of anti-slip rubber beads to improve the clamping stability of the capacitor;
[0007] The surface of the test bench is provided with a control component for controlling the distance between the two sets of fixed clamps;
[0008] The two sets of elastic clamping mechanisms are slidably disposed between the two sets of mounting frames. The two sets of elastic clamping mechanisms are used to connect the capacitor pins to the LCR tester. The sides of the two sets of mounting frames are provided with adjustment components for adjusting the height and extension distance of the elastic clamping mechanisms.
[0009] Preferably, the control component includes a connecting rod, an adjusting block, a turntable, and a rotating rod. The connecting rod connects the fixing clamp to the corresponding adjusting block. The turntable is connected to the rotating rod to facilitate the rotation of the rotating rod. The upper surface of the test platform is provided with an adjusting groove for limiting the movement of the two sets of adjusting blocks.
[0010] Preferably, the outer arc surface of the rotating rod is provided with two sets of threads in opposite directions. The two sets of adjusting blocks are symmetrically sleeved on the outer arc surface of the rotating rod. The two sets of adjusting blocks are threadedly connected to the rotating rod. When the rotating rod rotates, the two sets of adjusting blocks move towards or away from each other through the threads in opposite directions.
[0011] Preferably, the adjustment component includes a connecting sleeve, a support base, a telescopic rod, a positioning ball, and a moving module. The distance between the two sets of support bases is controlled by controlling the telescopic rod's extension distance inside the connecting sleeve. The connecting sleeve has several sets of positioning holes corresponding to the positioning balls on its side. The positioning balls are located on the side of the telescopic rod, and they are inserted into different positioning holes to fix the extension amount of the telescopic rod.
[0012] Preferably, the moving module includes a lead screw, a driven bevel gear, a driving bevel gear, a moving groove, and a moving block. Two sets of moving blocks are respectively disposed on opposite sides of two sets of connecting sleeves. The moving blocks are inserted into the moving groove to limit the movement of the connecting sleeves. The driving bevel gear meshes with the driven bevel gear to drive the lead screw to rotate. The moving block is threaded onto the outer arc surface of the lead screw.
[0013] Preferably, the two sets of elastic clamping mechanisms include an elastic clamp, a locking nut, and a clamp seat. The clamp seat is disposed inside the support base, and the locking nut is threaded onto the outer arc surface of the clamp seat to compress the elastic clamp.
[0014] Preferably, the LCR tester has a flexible wire on its side, and the support base has a connection hole for connecting the flexible wire to the pin.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention controls the distance between two sets of fixed clamps through a control component, thereby clamping capacitors of different sizes through the two sets of fixed clamps. At the same time, several sets of anti-slip rubber beads are set to improve the stability of clamping the capacitors. Then, the height of the elastic clamp mechanism and the distance between the two sets of elastic clamp mechanisms are adjusted by an adjustment component, so as to be suitable for capacitors with different lead lengths and different spacings, thereby improving the overall applicability of the tester fixture.
[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a front view of the overall structure of this utility model;
[0020] Figure 3 This is an exploded view of the overall structure of this utility model;
[0021] Figure 4 This is an exploded view of the adjustment component of this utility model.
[0022] In the diagram: 1. Test stand; 2. LCR tester; 3. Adjustment groove; 4. Connecting rod; 5. Lead screw; 6. Fixing clamp; 7. Elastic chuck; 8. Mounting frame; 9. Adjustment block; 10. Turntable; 11. Flexible wire; 12. Connecting sleeve; 13. Locking nut; 14. Anti-slip rubber bead; 15. Rotating rod; 16. Support base; 17. Driven bevel gear; 18. Driven bevel gear; 19. Telescopic rod; 20. Chuck seat; 21. Positioning ball; 22. Positioning hole; 23. Moving groove; 24. Moving block. Detailed Implementation
[0023] 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.
[0024] This utility model provides: a fixture for an aluminum electrolytic capacitor leakage current tester, such as... Figure 1-4 As shown, the system includes a test bench 1, an LCR tester 2, a fixing clamp 6, a mounting frame 8, and an elastic clamping mechanism. Two sets of fixing clamps 6, mounting frame 8, and elastic clamping mechanism are provided. Each of the two sets of fixing clamps 6 has several sets of anti-slip rubber beads 14 on their corresponding surfaces to improve the stability of capacitor clamping. The mounting frame 8 is fixedly mounted on the upper surface of the test bench 1 to support the elastic clamping mechanism, and the several sets of anti-slip rubber beads 14 further enhance the stability of the two sets of fixing clamps 6 clamping the capacitor.
[0025] Preferably, the surface of the test bench 1 is provided with a control component for controlling the distance between the two sets of fixed clamps 6. The control component includes a connecting rod 4, an adjusting block 9, a turntable 10, and a rotating rod 15. The connecting rod 4 connects the fixed clamp 6 to the corresponding adjusting block 9. The turntable 10 is connected to the rotating rod 15 to facilitate the rotation of the rotating rod 15. The upper surface of the test bench 1 is provided with an adjusting groove 3 for limiting the two sets of adjusting blocks 9. The adjusting block 9 is set as a protrusion to ensure that the adjusting block 9 can move along the adjusting groove 3 without tilting or rotating, thereby improving the stability of the adjusting block 9 during movement. When the adjusting block 9 moves, it drives the fixed clamp 6 to move through the connecting rod 4, so that the two sets of fixed clamps 6 can clamp capacitors of different sizes.
[0026] In addition, the outer arc surface of the rotating rod 15 has two sets of threads in opposite directions. The two sets of adjusting blocks 9 are symmetrically sleeved on the outer arc surface of the rotating rod 15. The two sets of adjusting blocks 9 are threadedly connected to the rotating rod 15. When the rotating rod 15 rotates, the two sets of adjusting blocks 9 move towards or away from each other through the threads in opposite directions. The rotating rod 15 is driven to rotate by the turntable 10 on the side of the rotating rod 15. The rotating rod 15 drives the two sets of adjusting blocks 9 to move through the two sets of threads in opposite directions, thereby achieving the effect of adjusting the distance between the two sets of fixed clamps 6, so that the clamp can be used for capacitors of different sizes.
[0027] Furthermore, two sets of elastic clamping mechanisms are slidably disposed between two sets of mounting frames 8. The two sets of elastic clamping mechanisms are used to connect the capacitor pins to the LCR tester 2. The sides of both sets of mounting frames 8 are provided with adjustment components for adjusting the height and telescopic distance of the elastic clamping mechanisms. The adjustment components include a connecting sleeve 12, a support base 16, a telescopic rod 19, a positioning ball 21, and a moving module. The distance between the two sets of support bases 16 is controlled by controlling the telescopic distance of the telescopic rod 19 inside the connecting sleeve 12. The side of the connecting sleeve 12 has several sets of positioning holes 22 corresponding to the positioning balls 21. The positioning balls 21 are disposed on the side of the telescopic rod 19. The positioning balls 21 are inserted into different positioning holes 22 to fix the extension amount of the telescopic rod 19. By allowing the telescopic rod 19 to slide inside the connecting sleeve 12 and the positioning balls 21 to be inserted into different positioning holes 22, the extension amount of the telescopic rod 19 is controlled. Thus, the distance between the two sets of elastic clamping mechanisms is adjusted according to the distance between the capacitor pins, so that the overall fixture is suitable for capacitors of different sizes.
[0028] Furthermore, the movable module includes a lead screw 5, a driven bevel gear 17, a driving bevel gear 18, a movable groove 23, and movable blocks 24. Two sets of movable blocks 24 are respectively disposed on opposite sides of two sets of connecting sleeves 12. The movable blocks 24 are inserted into the movable groove 23 to limit the movement of the connecting sleeves 12. The driving bevel gear 18 meshes with the driven bevel gear 17 to drive the lead screw 5 to rotate. The movable blocks 24 are threaded onto the outer arc surface of the lead screw 5. Both the driven bevel gear 17 and the driving bevel gear 18 are rotatably disposed inside the mounting frame 8, and the driving bevel gear... The side of the 18 is connected to another set of turntables 10 via a drive column. This avoids the turntables 10 being directly placed on the top of the mounting frame 8, which would affect the movement of the fixed clamp 6. By operating the turntables 10, the driving bevel gear 18 is driven to rotate. The driving bevel gear 18 meshes with and drives the driven bevel gear 17 to rotate, thereby driving the lead screw 5 to rotate. The lead screw 5 then drives the moving block 24 to move up and down through the thread. The moving block 24 is also set as a convex block, thereby preventing the moving block 24 from rotating with the lead screw 5, thus ensuring the stability when driving the elastic clamp mechanism to move up and down.
[0029] Specifically, the two sets of elastic clamping mechanisms include elastic clamps 7, locking nuts 13, and clamp seats 20. The clamp seats 20 are located inside the support base 16. The locking nuts 13 are threaded onto the outer arc surface of the clamp seats 20 to compress the elastic clamps 7. A flexible wire 11 is provided on the side of the LCR tester 2. The support base 16 has a connection hole for connecting the flexible wire 11 to the pin. The locking nuts 13 are located inside the clamp seats 20. By rotating the locking nuts 13 and moving them up and down, the elastic clamps 7 are compressed, thereby clamping the pins inside the elastic clamps 7. At the same time, the pins pass through the elastic clamps 7 and the clamp seats 20 and contact the flexible wire 11 on the lower surface of the support base 16. Then, the flexible wire 11 is connected to the LCR tester 2 to achieve the effect of testing the capacitor.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fixture for testing the leakage current of aluminum electrolytic capacitors, characterized in that, include: The test stand (1), LCR tester (2), fixing clamp (6), mounting frame (8) and elastic clamp mechanism are provided in two sets; Among them, the two sets of fixing clips (6) are provided with several sets of anti-slip rubber beads (14) on the corresponding surfaces to improve the clamping stability of the capacitor; The test bench (1) is provided with a control component on its surface for controlling the distance between the two sets of fixed clamps (6); The two sets of elastic clamping mechanisms are slidably disposed between the two sets of mounting frames (8). The two sets of elastic clamping mechanisms are used to connect the capacitor pins to the LCR tester (2). The sides of the two sets of mounting frames (8) are provided with adjustment components for adjusting the height and extension distance of the elastic clamping mechanisms.
2. The aluminum electrolytic capacitor leakage current tester fixture according to claim 1, characterized in that: The control component includes a connecting rod (4), an adjusting block (9), a turntable (10), and a rotating rod (15). The connecting rod (4) connects the fixing clamp (6) to the corresponding adjusting block (9). The turntable (10) is connected to the rotating rod (15) to facilitate the rotation of the rotating rod (15). The upper surface of the test platform (1) is provided with an adjusting groove (3) for limiting the two sets of adjusting blocks (9).
3. The aluminum electrolytic capacitor leakage current tester fixture according to claim 2, characterized in that: The outer arc surface of the rotating rod (15) is provided with two sets of threads in opposite directions. The two sets of adjusting blocks (9) are symmetrically sleeved on the outer arc surface of the rotating rod (15). The two sets of adjusting blocks (9) are threadedly connected to the rotating rod (15). When the rotating rod (15) rotates, the two sets of adjusting blocks (9) are driven to move towards or away from each other through the threads in opposite directions.
4. The aluminum electrolytic capacitor leakage current tester fixture according to claim 1, characterized in that: The adjustment assembly includes a connecting sleeve (12), a support base (16), a telescopic rod (19), a positioning ball (21), and a moving module. The distance between the two sets of support bases (16) is controlled by controlling the telescopic distance of the telescopic rod (19) inside the connecting sleeve (12). The connecting sleeve (12) has several sets of positioning holes (22) corresponding to the positioning ball (21) on its side. The positioning ball (21) is set on the side of the telescopic rod (19). The positioning ball (21) is inserted into different positioning holes (22) to fix the extension amount of the telescopic rod (19).
5. The aluminum electrolytic capacitor leakage current tester fixture according to claim 4, characterized in that: The moving module includes a lead screw (5), a driven bevel gear (17), a driving bevel gear (18), a moving groove (23), and a moving block (24). Two sets of moving blocks (24) are respectively set on opposite sides of two sets of connecting sleeves (12). The connecting sleeves (12) are limited by the moving blocks (24) being inserted into the moving groove (23). The driving bevel gear (18) meshes with the driven bevel gear (17) to drive the lead screw (5) to rotate. The moving block (24) is threaded onto the outer arc surface of the lead screw (5).
6. The aluminum electrolytic capacitor leakage current tester fixture according to claim 4, characterized in that: The two sets of elastic clamping mechanisms include an elastic clamp (7), a locking nut (13) and a clamp seat (20). The clamp seat (20) is located inside the support seat (16). The locking nut (13) is threaded onto the outer arc surface of the clamp seat (20) to compress the elastic clamp (7).
7. A fixture for testing the leakage current of an aluminum electrolytic capacitor according to claim 4, characterized in that: The LCR tester (2) has a flexible wire (11) on its side, and the support base (16) has a connection hole inside for connecting the flexible wire (11) to the pin.