Test fixture for ox horn capacitor

Abstract

The invention discloses a test fixture for an ox horn capacitor, and relates to the technical field of capacitors. A first air cylinder is mounted on one side of the fixing frame; a detection assembly is mounted at the bottom of the first air cylinder; a light supplementing lamp is mounted on the bottom surface of the side frame; a motor is arranged below the side frame; the clamping mechanism comprises eight clamping blocks, capacitors are detachably installed between the clamping blocks, a closing ring is arranged on one side of each capacitor, and the two sides of each closing ring are attached to the adjacent clamping blocks. According to the invention, the capacitor is protected and clamped on the clamping mechanism in an attached manner, the clamping mechanism is moved by means of the shifting mechanism, and the detection of the peripheral side surface defects and the pin resistance is completed in the process of two times of reciprocating movement, so that the detection is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and in particular to a testing fixture for horn capacitors. Background Art

[0002] Supercapacitors require specific testing and inspection to ensure that their performance meets specific application requirements. The DL / T2081-2020 standard specifies the test procedures for supercapacitors used for power energy storage. When testing such supercapacitors, they need to be tested one by one to ensure the safety performance of the capacitors during use.

[0003] The patent specification with publication number CN209117727U discloses a horn-type capacitor electrical performance test fixture, including an insulating base, a special-shaped base, electrodes and a toggle clamp. The middle of the upper surface of the insulating base is fixedly connected to the special-shaped base. The special-shaped base is provided with a first groove and a second groove. A pair of oppositely arranged electrodes are placed in the two grooves respectively. The electrodes are connected to the side walls and side plates of the special-shaped base respectively through thrust rings. The side plates are fixed to the toggle clamp.

[0004] When testing a capacitor, the fixture places the capacitor on a base and clamps the capacitor's pins through four electrodes to fix the capacitor, facilitating subsequent testing. The shortcomings of this technical solution are: first, the volume of supercapacitors is larger than that of conventional capacitors. Fixing the entire capacitor only by pins will cause the pins to be subjected to greater force, affecting the firmness of their installation, and overly concentrated clamping will damage the tin plating on the surface of the pins, affecting the electrical properties of their subsequent installation and wiring; second, the capacitor needs to be inspected for defects throughout the body during testing. This inspection is not accurate enough through visual inspection, including the degree of pin curvature, whether there are fine cracks on the side surfaces, etc., which require the use of equipment for detection. This solution cannot detect small defects in the capacitor. Summary of the Invention

[0005] The purpose of the present invention is to provide a test fixture for horn capacitors, and the technical problems to be solved are as follows: existing capacitor detection tools are prone to damage the pins when fixing the capacitors and are unable to detect minor defects in the capacitors.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A testing fixture for a horn capacitor comprises a side frame, a fixing frame being mounted on one side of the side frame, a detection camera being mounted inside the fixing frame, a cylinder being mounted on one side of the fixing frame, a detection assembly being mounted on the bottom of the cylinder, a fill light being mounted on the bottom surface of the side frame, a motor being disposed below the side frame, a shifting mechanism being connected to one side of the motor, a clamping mechanism being mounted on the top of the shifting mechanism, the clamping mechanism comprising eight clamping blocks, a capacitor being detachably mounted between each of the clamping blocks, a closing ring being disposed on one side of the capacitor, both sides of the closing ring being in contact with adjacent clamping blocks; the detection camera and the detection assembly being used to jointly detect the capacitor.

[0007] As a further solution of the present invention: a connecting plate is fixedly connected between the side frame and the fixed frame, a memory is installed on the top of the detection camera, a side plate is fixedly connected between the fixed frame and the memory, and the cylinder is installed on one side of the side plate.

[0008] As a further solution of the present invention: a lamp stand is fixedly connected to the bottom of the side frame, cantilevers are provided on both sides of the lamp stand, the fill light includes a lampshade fixedly connected between the two cantilevers, a plurality of lamp beads are installed on the inside of the lampshade, a reflective sticker is provided on the inside of the lampshade, the top of the lampshade is open, and the lampshade and the capacitor are located directly below the lens of the detection camera.

[0009] As a further solution of the present invention: the bottom surface of the motor is fixedly connected to the main base, and a sub-base is provided on one side of the main base. The shifting mechanism includes a main right-angle gear fixedly connected to the output end of the motor, and the main right-angle gear is engaged with a sub-right-angle gear. A slide rail is fixedly connected between the top of the main base and the sub-base, and a transmission belt is installed between the top of the sub-right-angle gear and the top of the sub-base. A slider is slidably connected to the top of the slide rail, and both sides of the bottom surface of the slider are fixedly connected to the transmission belt on the adjacent side, and the clamping mechanism is fixedly connected to the top of the slider.

[0010] As a further solution of the present invention: the clamping mechanism also includes a base plate fixedly connected to the top of the slider, two fixed clamping arms are fixedly connected to one side of the top of the base plate, a second cylinder is installed at the top of the base plate between the two fixed clamping arms, one end of the second cylinder is fixedly connected to a cross frame, both sides of the cross frame are fixedly connected to movable clamping arms, guide rails are installed on both sides of the top of the base plate, and the guide rails are slidably connected to the adjacent movable clamping arms.

[0011] As a further solution of the present invention: the two fixed clamping arms are parallel to each other, and the parallel direction is perpendicular to the direction of the slide rail. Each clamping block is respectively installed on the adjacent sides of the fixed clamping arm and the movable clamping arm, and both are in contact with the peripheral side of the capacitor.

[0012] As a further solution of the present invention: the detection component includes a detection bracket fixedly connected to a telescopic rod of the cylinder, a positioning plate fixedly connected to one side of the detection bracket, a resistance meter installed on one side of the positioning plate, a sleeve installed on the bottom surface of the positioning plate, a test probe installed inside the sleeve, the test probe is slidably connected to the sleeve, and a reset spring is installed between the test probe and the sleeve, and the test probe is electrically connected to the resistance meter.

[0013] As a further solution of the present invention: the extended lines of the central axis of the detection camera and the test probe intersect with the central axis of the slide rail, and the two pins of the capacitor are arranged vertically.

[0014] Beneficial effects of the present invention: In the present invention, a detection camera is provided, a detection assembly is installed on one side of the detection camera, a shift mechanism is provided below the detection camera, and an openable and closable clamping mechanism is installed on the top of the shift mechanism. After the capacitor is installed in the clamping mechanism, the shift mechanism can reciprocate the capacitor below the detection camera and the detection assembly. At the same time, due to the opening and closing action of the clamping mechanism, the angle of the capacitor can be converted. Therefore, after the shift mechanism reciprocates the clamping mechanism twice, two-dimensional detection of defects on the side surface of the capacitor and electrical properties can be achieved, thereby making the detection results more comprehensive and accurate. In addition, when clamping the capacitor, eight clamping blocks are used to clamp the peripheral side of the capacitor in a close-fitting manner, and four of the clamping blocks are in close-fitting contact with the closing ring of the horn capacitor, which increases the support area and improves the clamping stability while avoiding the damage to the pin position plating by the clamping pin in the existing technology. Furthermore, it aims to avoid subsequent interference with the pin resistance detection, improve the safety of clamping during the detection process, and improve the convenience of pin detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a bottom view of the present invention; Figure 3 It is a partial structural diagram of the slide rail of the present invention; Figure 4 This invention Figure 1 A magnified view of the details at center A; Figure 5 This invention Figure 3 A magnified view of the detail at point B.

[0017] In the figure: 1. Side frame; 2. Fixed frame; 3. Detection camera; 4. Cylinder 1; 5. Detection assembly; 51. Detection bracket; 52. Positioning plate; 53. Resistance meter; 54. Sleeve; 55. Test probe; 56. Return spring; 6. Fill light; 61. Lamp cover; 62. Lamp beads; 63. Reflective tape; 7. Motor; 8. Shift mechanism; 81. Main right-angle gear; 82. Secondary right-angle gear; 83. Slide rail; 84. Transmission belt; 85. Slider; 9. Clamping mechanism; 91. Clamp block; 92. Bottom plate; 93. Fixed clamping arm; 94. Cylinder 2; 95. Cross frame; 96. Moving clamping arm; 97. Guide rail; 10. Capacitor; 11. Closing ring; 12. Connecting plate; 13. Storage device; 14. Side panel; 15. Lamp holder; 16. Main base; 17. Secondary base. DETAILED DESCRIPTION

[0018] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] like Figures 1 to 5 As shown, a test fixture for a horn capacitor includes a side frame 1, a fixing frame 2 is installed on one side of the side frame 1, a detection camera 3 is installed in the fixing frame 2, a cylinder 4 is installed on the side of the fixing frame 2 away from the side frame 1, a detection component 5 is installed at the bottom of the telescopic rod of the cylinder 4, a fill light 6 is installed on the bottom surface of the side frame 1, a motor 7 is provided below the side frame 1, a shift mechanism 8 is connected to one side of the motor 7, a clamping mechanism 9 is installed on the top of the shift mechanism 8, the clamping mechanism 9 includes eight clamping blocks 91, a capacitor 10 is detachably installed between each clamping block 91, a closing ring 11 is provided on one side of the capacitor 10, and both sides of the closing ring 11 are in contact with adjacent clamping blocks 91; It should be noted that one side of the side frame 1 is fixed on a support frame (not shown), and the support frame is used to support the top camera structure. A connecting plate 12 is fixedly connected between the side frame 1 and the fixed frame 2, and the fixed frame 2 is fixedly connected to the connecting plate 12. A memory 13 is installed on the top of the detection camera 3, and the memory 13 is used to store the image information captured by the detection camera 3. The staff determines whether there are minor defects on the surface of the capacitor 10 by reading the information. A side plate 14 is fixedly connected between one side of the memory 13 and the fixed frame 2, and the cylinder 14 is installed on the bottom side of the side plate 14.

[0020] like Figure 1 and Figure 2As shown, the bottom of the side frame 1 is fixedly connected to the lamp holder 15, and cantilevers are set on both sides of the lamp holder 15. The fill light 6 includes a lampshade 61 fixedly connected between the two cantilevers. A large number of lamp beads 62 are evenly installed along the arc surface inside the lampshade 61. A reflective sticker 63 is set on the inside of the lampshade 61. The top of the lampshade 61 is open, and the capacitor 10 is located directly below the lens of the detection camera 3. It should be noted that when the capacitor 10 is moved to the bottom of the lampshade 61 by the shifting mechanism 8, the fill light 6 illuminates the capacitor 10 through the evenly arranged lamp beads 62 inside. During the illumination process, the reflective sticker 63 is provided to project the light, so that the detection camera 3 can clearly capture the image when it shines on the capacitor 10 through the opening at the top of the lampshade 61, so that the staff can more clearly identify abnormal conditions such as fine cracks and bumps around the capacitor 10, thereby improving the accuracy of the detection of the capacitor 10.

[0021] like Figure 1 and Figure 3 As shown, the bottom surface of the motor 7 is fixedly connected to the main base 16, and a sub-base 17 is provided on one side of the main base 16. The shift mechanism 8 includes a main right-angle gear 81 fixedly connected to the output end of the motor 7, and the main right-angle gear 81 is engaged with the sub-right-angle gear 82. A slide rail 83 is fixedly connected between the top ends of the main base 16 and the sub-base 17. A transmission belt 84 is installed in the middle of the slide rail 83. The transmission belt 84 is rotatably connected to the top end of the sub-right-angle gear 82. A slider 85 is slidably connected to the top end of the slide rail 83. Both sides of the bottom surface of the slider 85 are fixedly connected to the transmission belt 84 on the adjacent sides. The clamping mechanism 9 is fixedly connected to the top end of the slider 85. It should be noted that the rotation of the motor 7 drives the main right-angle gear 81 of the shifting mechanism 8 to rotate, and then drives the secondary right-angle gear 82 to rotate. During the rotation of the secondary right-angle gear 82, it drives the transmission belt 84 connected to the top to rotate. The rotating shafts at both ends of the transmission belt 84 are respectively installed on the main base 16 and the secondary base 17. When the transmission belt 84 rotates, it drives the slider 85 fixed to it to move. The slider 85 is slidingly connected to the slide rail 83. The slider 85 is limited by the slide rail 83 and the forward and reverse rotation of the motor 7, and can realize reciprocating motion on the slide rail 83, thereby finally driving the movement of the clamping mechanism 9 fixedly connected at the bottom, so that it can be moved to the bottom of the detection camera 3 for detection, which is also convenient for the subsequent detection of the detection component 5.

[0022] like Figure 3 and Figure 5As shown, the clamping mechanism 9 also includes a bottom plate 92 fixedly connected to the top of the slider 85, and two fixed clamping arms 93 are fixedly connected to one side of the top of the bottom plate 92. The two fixed clamping arms 93 are parallel to each other, and the parallel direction is perpendicular to the direction of the slide rail 83. A second cylinder 94 is installed between the two fixed clamping arms 93 at the top of the bottom plate 92. The end of the telescopic rod of the second cylinder 94 is fixedly connected to a cross frame 95. Both sides of the cross frame 95 are fixedly connected to movable clamping arms 96. Guide rails 97 are installed on both sides of the top of the bottom plate 92. The guide rails 97 are slidably connected to adjacent movable clamping arms 96. Each clamping block 91 is respectively installed on the adjacent sides of the fixed clamping arm 93 and the movable clamping arm 96, and all fit the side surfaces of the capacitor 10. It should be noted that the clamping blocks 91 are all installed on the inner sides of the movable clamping arm 96 and the fixed clamping arm 93, and both arms are "C"-shaped. A clamping block 91 is installed on the bottom and top of each clamping arm, for a total of eight. A rubber sealing ring is provided inside the horn capacitor to ensure the sealing effect of the sealing ring on the internal electrolyte. A groove is provided on the side surface of the sealing ring to fit into the interior of the capacitor 10. Therefore, a closing ring 11 is provided on the outside of the capacitor 10 to adapt to the groove. Since the closing ring 11 also fits four clamping blocks 91, and the inner concave surface of the closing ring 11 has a larger contact area than the other side surfaces, the clamping of the four clamping blocks 91 here is more stable, and the clamping of the other four clamping blocks 91 is combined to ensure the stability of the capacitor 10 clamped in the movable disassembly structure, thereby ensuring the stability of the capacitor 10 when the detection camera 3 is shooting and the detection component 5 is detecting; In addition, since the side surface of the capacitor 10 is divided into an upper half and a lower half, and there are two pins, two inspections are required during the inspection. After the inspection of the side surface of the upper half of the capacitor 10 and the upper half of the pins is completed, the shifting mechanism 8 shifts the slider 85 to the initial state close to the motor 7, and then the cylinder 2 94 pushes the cross frame 95, and the movable clamping arms 96 on both sides of the cross frame 95 move along the guide rail 97, and the clamped capacitor 10 is immediately released. After the capacitor 10 is rotated 180°, it is reinstalled between the two sets of movable clamping arms 96 and the fixed clamping arms 93, and then re-inspected to complete the comprehensive inspection of the side surface and two pins of the capacitor 10; cylinder 2 94 is a micro cylinder.

[0023] like Figure 1 and Figure 4 As shown, the detection assembly 5 includes a detection bracket 51 fixedly connected to the telescopic rod of the cylinder 4, a positioning plate 52 fixedly connected to one side of the detection bracket 51, a resistance meter 53 installed on one side of the positioning plate 52, a sleeve 54 installed on the bottom surface of the positioning plate 52, a test probe 55 installed inside the sleeve 54, the test probe 55 is slidably connected to the sleeve 54, and a return spring 56 is installed between the sleeve 54, the test probe 55 is electrically connected to the resistance meter 53, the extension lines of the central axis of the detection camera 3 and the test probe 55 intersect with the central axis of the slide rail 83, and the two pins of the capacitor 10 are arranged vertically; It should be noted that when testing supercapacitors, the resistance of the pins needs to be measured. When oxidation or corrosion occurs on the surface of the pins, their resistance value will far exceed the normal value. The pins are connected to the internal cells. When the internal cells are short-circuited, the surface resistance of the pins will be abnormally low. The safety standards for the production of capacitors 10 also stipulate the measurement range of the resistance value. Therefore, measuring the resistance value of the capacitor 10 pins by the detection component 5 is an important indicator for measuring the quality of the capacitor 10. Specifically, since the slide rail 83 is located directly below the detection camera 3 and the test probe 55, the shifting mechanism 8 will continue to move to the bottom of the test probe 55 after moving the capacitor 10 to the bottom of the detection camera 3 for detection. At this time, the cylinder 14 pushes the detection bracket 51 to move vertically, driving the sleeve 54 fixedly connected to the positioning plate 52 to move downward. The test probe 55 then contacts the vertically placed pins until the reset spring 56 is compressed, indicating that the contact is stable at this time. Then, the resistance value on the resistance meter 53 is measured to judge the quality of the finished capacitor 10. In addition, since the capacitor 10 is installed on the clamping mechanism 9 and is moved by the shifting mechanism 8, only half of the peripheral side surface can be inspected for defects at a time, and only the resistance of the half-side pins can be inspected. Therefore, after a single inspection is completed, the clamping mechanism 9 needs to release the capacitor 10 and rotate it, and repeat the inspection for the second time to complete the overall inspection. The secondary inspection jointly completes the two-dimensional test of the electrical characteristics quality of the capacitor 10 and the characterization of production quality, making the inspection more efficient and comprehensive.

[0024] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A test fixture for a horn capacitor, comprising a side frame (1), a fixing frame (2) being mounted on one side of the side frame (1), characterized in that: A detection camera (3) is installed inside the fixing frame (2), a cylinder (4) is installed on one side of the fixing frame (2), a detection assembly (5) is installed at the bottom of the cylinder (4), a fill light (6) is installed on the bottom of the side frame (1), a motor (7) is provided below the side frame (1), a shift mechanism (8) is connected to one side of the motor (7), a clamping mechanism (9) is installed at the top of the shift mechanism (8), the clamping mechanism (9) includes eight clamping blocks (91), a capacitor (10) is detachably installed between each clamping block (91), a closing ring (11) is provided on one side of the capacitor (10), both sides of the closing ring (11) are in contact with the adjacent clamping blocks (91); the detection camera (3) and the detection assembly (5) are used to jointly detect the capacitor (10).

2. A test fixture for a horn capacitor according to claim 1, characterized in that: A connecting plate (12) is fixedly connected between the side frame (1) and the fixed frame (2), a memory (13) is installed on the top of the detection camera (3), a side plate (14) is fixedly connected between the fixed frame (2) and the memory (13), and the cylinder (4) is installed on one side of the side plate (14).

3. The test fixture for a horn capacitor according to claim 1, characterized in that: The bottom of the side frame (1) is fixedly connected to a light frame (15), and cantilevers are provided on both sides of the light frame (15). The fill light (6) includes a lampshade (61) fixedly connected between the two cantilevers, and a plurality of lamp beads (62) are installed on the inner side of the lampshade (61). A reflective sticker (63) is provided on the inner side of the lampshade (61). The top of the lampshade (61) is open, and the lampshade and the capacitor (10) are both located directly below the lens of the detection camera (3).

4. The test fixture for a horn capacitor according to claim 1, characterized in that: The bottom surface of the motor (7) is fixedly connected to a main base (16), and a sub-base (17) is provided on one side of the main base (16). The shifting mechanism (8) includes a main right-angle gear (81) fixedly connected to the output end of the motor (7), and the main right-angle gear (81) is engaged with a sub-right-angle gear (82). A slide rail (83) is fixedly connected between the top ends of the main base (16) and the sub-base (17), and a transmission belt (84) is installed between the top ends of the sub-right-angle gear (82) and the sub-base (17). A slider (85) is slidably connected to the top end of the slide rail (83), and both sides of the bottom surface of the slider (85) are fixedly connected to the transmission belt (84) on the adjacent side. The clamping mechanism (9) is fixedly connected to the top end of the slider (85).

5. The test fixture for a horn capacitor according to claim 4, characterized in that: The clamping mechanism (9) further comprises a base plate (92) fixedly connected to the top of the slider (85), two fixed clamping arms (93) fixedly connected to one side of the top of the base plate (92), a second cylinder (94) is installed between the two fixed clamping arms (93) at the top of the base plate (92), one end of the second cylinder (94) is fixedly connected to a cross frame (95), both sides of the cross frame (95) are fixedly connected to movable clamping arms (96), and guide rails (97) are installed on both sides of the top of the base plate (92), and the guide rails (97) are slidably connected to the adjacent movable clamping arms (96).

6. A test fixture for a horn capacitor according to claim 5, characterized in that: The two fixed clamping arms (93) are parallel to each other, and the parallel direction is perpendicular to the direction of the slide rail (83). Each clamping block (91) is respectively installed on the adjacent side of the fixed clamping arm (93) and the movable clamping arm (96), and both are in contact with the peripheral side surface of the capacitor (10).

7. The test fixture for a horn capacitor according to claim 4, characterized in that: The detection assembly (5) includes a detection bracket (51) fixedly connected to the telescopic rod of the cylinder (4), a positioning plate (52) fixedly connected to one side of the detection bracket (51), a resistance meter (53) installed on one side of the positioning plate (52), a sleeve (54) installed on the bottom surface of the positioning plate (52), a test probe (55) installed inside the sleeve (54), the test probe (55) is slidably connected to the sleeve (54), and a return spring (56) is installed between the test probe (55) and the sleeve (54), and the test probe (55) is electrically connected to the resistance meter (53).

8. The test fixture for a horn capacitor according to claim 7, characterized in that: The extended lines of the central axes of the detection camera (3) and the test probe (55) intersect with the central axis of the slide rail (83), and the two pins of the capacitor (10) are arranged vertically.

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