Double-cam self-centering pressure-resistant testing device

Abstract

The utility model discloses a double cam self -centering formula pressure resistance testing arrangement relates to automatic test equipment technical field. The pressure resistance testing arrangement includes the lower pressure mechanism and sets up the double cam self -centering mechanism at the bottom of lower pressure mechanism, the lower pressure mechanism includes the slide platform air cylinder, the floating plate, the upper electrode, the guide pin, the support plate that set up in proper order, and the opposite sides of support plate are equipped with the inner electrode and the outer electrode, and the slide platform air cylinder can drive the floating plate and do the reciprocating motion of vertical direction, the double cam self -centering mechanism includes cam slide slot board, drive cylinder and cam follower, and the cam slide slot board sets up at the bottom of support plate, and drive cylinder is connected at the bottom of cam slide slot board, and the linear guide is equipped on the cam slide slot board, and the cam follower is connected with cam slide slot board. The utility model provides a double cam self -centering formula pressure resistance testing arrangement, can hold the inner diameter and the outer diameter of product simultaneously, and simple operation improves the efficiency to a great extent.

Description

Technical Field

[0001] This utility model relates to the field of automated testing equipment technology, and in particular to a double-cam self-centering pressure testing device. Background Technology

[0002] In the 3C electronics industry, magnetic rings are commonly used anti-interference components in electronic circuits. To prevent current leakage and enhance the magnetic field effect, they are usually coated with an insulating coating. In actual production, it's impossible to completely ensure that the insulating coating on every magnetic ring is uniformly applied without surface damage. Even a small break in the insulating coating on the surface of the magnetic ring can affect its functionality. Therefore, a Hipot (withstand voltage test) is necessary to eliminate defective products. Traditional magnetic ring Hipot testing requires manual inspection using the positive and negative probes of the instrument, which cannot cover the entire surface of the magnetic ring and is extremely inefficient. To avoid missed tests and improve efficiency, there is an urgent need for a semi-automatic Hipot device that offers high coverage, small size, high cost-effectiveness, and simple operation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a double-cam self-centering pressure resistance testing device.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A double-cam self-centering withstand pressure testing device is provided, including a pressing mechanism and a double-cam self-centering mechanism disposed at the bottom of the pressing mechanism; the pressing mechanism includes a slide cylinder, a floating plate, an upper electrode, a guide pin, and a support plate arranged in sequence, with inner and outer electrodes disposed on opposite sides of the support plate, and the slide cylinder can drive the floating plate to perform reciprocating motion in the vertical direction; the double-cam self-centering mechanism includes a cam slide plate, a driving cylinder, and a cam follower, the cam slide plate is disposed at the bottom of the support plate, the driving cylinder is connected to the bottom of the cam slide plate, a linear guide rail is disposed on the cam slide plate, and the cam follower is connected to the cam slide plate.

[0006] Preferably, the guide pin is connected to the bottom of the upper electrode.

[0007] Preferably, the drive cylinder can drive the cam slide plate to perform opening and closing movements in the front-back direction and the left-right direction.

[0008] Preferably, the upper electrode includes upper electrode + (positive electrode of upper electrode) and upper electrode - (negative electrode of upper electrode); the outer electrode includes outer electrode + (positive electrode of outer electrode) and outer electrode - (negative electrode of outer electrode); and the inner electrode includes inner electrode + (positive electrode of inner electrode) and inner electrode - (negative electrode of inner electrode).

[0009] Preferably, the dual-cam self-centering withstand pressure testing device further includes a Hipot instrument, which is connected to the upper electrode, inner electrode, and outer electrode.

[0010] Furthermore, the outer surfaces of the upper electrode, inner electrode, and outer electrode are all provided with conductive silicone.

[0011] Preferably, the conductive silicone is attached to the upper electrode, inner electrode, and outer electrode by injection molding.

[0012] Furthermore, the linear guide rail is composed of an intersecting first linear guide rail and a second linear guide rail.

[0013] Furthermore, the dual-cam self-centering mechanism also includes a first compression spring and a tension spring, wherein the first compression spring is connected to the first linear guide rail and the tension spring is connected to the cam follower.

[0014] Preferably, the first compression spring and the tension spring are arranged in parallel.

[0015] Furthermore, the pressing mechanism also includes a guide screw and a height equalizing screw, wherein the guide screw is connected above the floating plate and the height equalizing screw is connected below the floating plate.

[0016] Furthermore, the pressing mechanism also includes a second compression spring and a third compression spring, wherein the second compression spring is sleeved outside the guide screw and the third compression spring is sleeved outside the equalizing screw.

[0017] Furthermore, the pressing mechanism also includes a pressing fixing frame, and the slide cylinder is mounted on the pressing fixing frame.

[0018] Furthermore, the dual-cam self-centering mechanism also includes a bottom fixing frame and electrode insulating spacers. The drive cylinder is mounted on the bottom fixing frame, and there are multiple electrode insulating spacers, which are respectively connected to the upper electrode, the inner electrode, and the outer electrode.

[0019] Furthermore, the bottom mounting bracket is also equipped with an AC manifold and a stroke limit block, with the stroke limit block positioned between the AC manifold and the drive cylinder.

[0020] Furthermore, a floating joint is provided between the stroke limit block and the drive cylinder.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. This testing device can simultaneously clamp the inner and outer diameters of a product, and its simple operation greatly improves efficiency;

[0023] 2. The outer surfaces of the upper electrode, inner electrode, and outer electrode are all provided with conductive silicone. The conductive silicone can effectively absorb the dimensional tolerances of the product when the electrode comes into contact with the product, achieving a 96% coverage of the product surface and effectively reducing the risk of missed detection. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an exploded view of the double-cam self-centering pressure resistance testing device according to an embodiment of the present invention;

[0026] Figure 2 This is an overall diagram of the dual-cam self-centering pressure resistance testing device according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the electrode structure when testing the product according to an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the connection of the electrode insulating spacer block in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the double-cam self-centering mechanism according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the upward movement of the cam slide plate of the double cam self-centering mechanism in an embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the downward movement of the cam slide plate of the double cam self-centering mechanism according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the cam slide plate of the double cam self-centering mechanism in an embodiment of the present invention when it is released;

[0033] Figure 9 This is a schematic diagram of the cam slide plate clamping in the double cam self-centering mechanism of this utility model embodiment;

[0034] Figure 10 This is a schematic diagram showing the connection between the floating plate and the upper electrode in an embodiment of this utility model;

[0035] Figure 11 This is a schematic diagram showing the connection between the internal electrode and the conductive silicone in an embodiment of this utility model;

[0036] Figure 12 This is a schematic diagram showing the connection between the external electrode and the conductive silicone in an embodiment of this utility model;

[0037] Figure 13 This is a schematic diagram showing the connection between the electrode and the conductive silicone in an embodiment of the present invention;

[0038] Explanation of the markings in the image:

[0039] 1-Slide cylinder; 2-Floating plate; 3-Upper electrode; 4-Guide pin; 5-Support plate; 6-Inner electrode; 7-Outer electrode; 8-Cam slide plate; 9-Drive cylinder; 10-Cam follower; 11-Upper electrode +; 12-Upper electrode -; 13-Outer electrode +; 14-Outer electrode -; 15-Inner electrode +; 16-Inner electrode -; 17-Conductive silicone; 18-Test product; 19-First linear guide; 20-Second linear guide; 21-First compression spring; 22-Tension spring; 23-Guide screw; 24-Equal height screw; 25-Second compression spring; 26-Third compression spring; 27-Lower pressure fixing bracket; 28-Bottom fixing bracket; 29-Electrode insulation spacer; 30-First insulation POM; 31-Second insulation POM; 32-Third insulation POM; 33-AC busbar; 34-Stroke limit block; 35-Floating connector. Detailed Implementation

[0040] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] Example

[0044] Please see Figures 1-13 The double-cam self-centering withstand pressure testing device shown includes a pressing mechanism and a double-cam self-centering mechanism located at the bottom of the pressing mechanism. The pressing mechanism includes a slide cylinder 1, a floating plate 2, an upper electrode 3, a guide pin 4, and a support plate 5 arranged in sequence. The support plate 5 has an inner electrode 6 and an outer electrode 7 on opposite sides. The slide cylinder 1 can drive the floating plate 2 to perform reciprocating motion in the vertical direction. The double-cam self-centering mechanism includes a cam slide plate 8, a drive cylinder 9, and a cam follower 10. The cam slide plate 8 is located at the bottom of the support plate 5. The drive cylinder 9 is connected to the bottom of the cam slide plate 8. The cam slide plate 8 is provided with a linear guide rail. The cam follower 10 is connected to the cam slide plate 8.

[0045] The upper electrode 3 includes upper electrode +11 (positive electrode of upper electrode 3) and upper electrode -12 (negative electrode of upper electrode 3); the outer electrode 7 includes outer electrode +13 (positive electrode of outer electrode 7) and outer electrode -14 (negative electrode of outer electrode 7); the inner electrode 6 includes inner electrode +15 (positive electrode of inner electrode 6) and inner electrode -16 (negative electrode of inner electrode 6). The dual-cam self-centering withstand voltage testing device also includes a Hipot instrument (withstand voltage testing instrument), which is connected to the upper electrode 3, inner electrode 6, and outer electrode 7. The outer surfaces of the upper electrode 3, inner electrode 6, and outer electrode 7 are all provided with conductive silicone 17. The conductive silicone 17 is attached to the upper electrode 3, outer electrode 7, and inner electrode 6 by injection molding. The upper electrode 3 tests the outer diameter surface of the product under test 18, the outer electrode 7 tests the inner diameter surface of the product under test 18, and the inner electrode 6 tests both end faces of the product under test 18.

[0046] The linear guide rail is composed of intersecting first linear guide rail 19 and second linear guide rail 20. In this embodiment, the double cam self-centering mechanism further includes a first compression spring 21 and a tension spring 22. The first compression spring 21 is connected to the first linear guide rail 19, and the tension spring 22 is connected to the cam follower 10. In use, the cam slide plate 8 is pushed by the drive cylinder. The intersecting linear guide rails on the cam slide plate 8 can convert the linear motion into two sets of opening and closing motions in opposite directions, which can realize the simultaneous clamping of the inner and outer diameters. The clamping force is controlled by the compression of the first compression spring 21, which can effectively prevent the product under test 18 from being damaged by excessive clamping force.

[0047] The pressing mechanism also includes a guide screw 23 and a leveling screw 24. The guide screw 23 is connected above the floating plate 2, and the leveling screw 24 is connected below the floating plate 2. The pressing mechanism also includes a second compression spring 25 and a third compression spring 26. The second compression spring 25 is sleeved outside the guide screw 23, and the third compression spring 26 is sleeved outside the leveling screw 24. The pressing mechanism also includes a pressing fixing frame 27, on which the slide cylinder 1 is mounted. In use, the slide cylinder 1 pushes the floating plate 2 and the electrodes (upper electrode 3, outer electrode 7, and inner electrode 6) downwards. The upper electrode 3 can float freely up and down by 0.5mm. The guide pin 4 is positioned in the pin hole on the outer electrode 7, eliminating accumulated assembly and machining errors to achieve precise positioning. The downward pressure of the upper electrode 3 is the combined compression force of the second and third springs, effectively preventing excessive pressure from damaging the tested product 18.

[0048] The dual-cam self-centering mechanism further includes a bottom fixing frame 28 and electrode insulating spacers 29. The drive cylinder 9 is mounted on the bottom fixing frame 28. Multiple electrode insulating spacers 29 are connected to the upper electrode 3, inner electrode 6, and outer electrode 7, respectively. In this embodiment, the electrode insulating spacers 29 include a first insulating POM30 (polyoxymethylene), a second insulating POM31, and a third insulating POM32; wherein the first insulating POM30 is connected to the upper electrode 3, the second insulating POM31 is connected to the outer electrode 7, and the third insulating POM32 is connected to the inner electrode 6. The bottom fixing frame 28 is also provided with an AC busbar 33 and a stroke limiting block 34. The stroke limiting block 34 is located between the AC busbar 33 and the drive cylinder 9. A floating connector 35 is also provided between the stroke limiting block 34 and the drive cylinder 9.

[0049] The testing principle is as follows:

[0050] The product under test 18 is placed between the positive and negative electrodes of the upper electrode 3, outer electrode 7, and inner electrode 6. The positive and negative electrodes of the upper electrode 3, outer electrode 7, and inner electrode 6 are connected to the OUTPUT and RTN ports of the Hipot instrument via high-voltage cables. The Hipot instrument outputs a test high voltage of AC 1.5KV and maintains it for 3 seconds. Once the leakage current of the product under test 18 is greater than or equal to the set leakage current of 0.5mA, the test voltage is instantly cut off, and the product under test 18 is judged as FAIL; if the leakage current of the product under test 18 is less than 0.5mA, the product under test 18 is judged as PASS.

[0051] To ensure the accuracy of test results, the Hipot instrument's design must consider the electrical clearance between the two conductors and ensure that there are no other loops between the positive and negative electrodes causing leakage. According to GB / T16935.1-2023, when the effective value of the non-uniform electric field voltage is 1.5KV, the electrical clearance between the positive and negative electrodes cannot be less than 1.7mm, as determined by the interpolation method. Furthermore, electrode insulating spacers 29 (insulating material) are used at the fixed connections of the upper electrode 3, outer electrode 7, and inner electrode 6 to isolate them from other components of the pressing mechanism for current.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A double-cam self-centering withstand pressure testing device, characterized in that, The device includes a pressing mechanism and a double-cam self-centering mechanism located at the bottom of the pressing mechanism. The pressing mechanism includes a slide cylinder, a floating plate, an upper electrode, a guide pin, and a support plate arranged in sequence. The support plate has inner and outer electrodes on opposite sides. The slide cylinder can drive the floating plate to perform reciprocating motion in the vertical direction. The double-cam self-centering mechanism includes a cam slide plate, a drive cylinder, and a cam follower. The cam slide plate is located at the bottom of the support plate. The drive cylinder is connected to the bottom of the cam slide plate. The cam slide plate has a linear guide rail. The cam follower is connected to the cam slide plate.

2. The double-cam self-centering withstand pressure testing device as described in claim 1, characterized in that, The outer surfaces of the upper electrode, inner electrode, and outer electrode are all provided with conductive silicone.

3. The double-cam self-centering withstand pressure testing device as described in claim 2, characterized in that, The linear guide rail is composed of an intersecting first linear guide rail and a second linear guide rail.

4. The double-cam self-centering withstand pressure testing device as described in claim 3, characterized in that, The aforementioned dual-cam self-centering mechanism further includes a first compression spring and a tension spring. The first compression spring is connected to the first linear guide rail, and the tension spring is connected to the cam follower.

5. The double-cam self-centering withstand pressure testing device as described in claim 4, characterized in that, The pressing mechanism also includes guide screws and equalizing screws. The guide screws are connected above the floating plate, and the equalizing screws are connected below the floating plate.

6. The double-cam self-centering withstand pressure testing device as described in claim 5, characterized in that, The pressing mechanism further includes a second compression spring and a third compression spring. The second compression spring is sleeved outside the guide screw, and the third compression spring is sleeved outside the equalizing screw.

7. The double-cam self-centering withstand pressure testing device as described in claim 6, characterized in that, The pressing mechanism also includes a pressing fixing frame, and the slide cylinder is mounted on the pressing fixing frame.

8. The double-cam self-centering withstand pressure testing device as described in claim 7, characterized in that, The dual-cam self-centering mechanism further includes a bottom fixing frame and electrode insulating spacers. The drive cylinder is mounted on the bottom fixing frame, and there are multiple electrode insulating spacers, which are respectively connected to the upper electrode, inner electrode, and outer electrode.

9. The double-cam self-centering withstand pressure testing device as described in claim 8, characterized in that, The bottom mounting bracket is also equipped with an AC manifold and a stroke limit block, with the stroke limit block positioned between the AC manifold and the drive cylinder.

10. The double-cam self-centering withstand pressure testing device as described in claim 9, characterized in that, A floating joint is also provided between the stroke limit block and the drive cylinder.

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