Capacitor service life test clamp

Abstract

The utility model discloses a capacitor service life test clamp, and relates to the technical field of capacitor detection, the capacitor service life test clamp comprises a clamping box with one end provided with an opening, a clamping structure is arranged in the clamping box, and four corners of the upper and lower surfaces of the clamping box are fixedly connected with connecting rods. Through cooperative arrangement of the clamping box, the first clamping hole, the clamping plate, the second clamping hole, a spring and other structures, during use, the clamping plate is pushed to enable the first clamping hole and the second clamping hole to be aligned, the middle section of the capacitor penetrates through the first clamping hole and the second clamping hole, the clamping plate is loosened, the clamping plate moves under the action of the elastic force of the spring, and the capacitor is clamped. The inner walls of the first clamping hole and the second clamping hole clamp the capacitor from the two sides, the end of the capacitor is not subjected to clamping acting force, and it is avoided as much as possible that when a traditional test clamp fixes the capacitor, certain pressure is applied to the two ends of the capacitor, oxidation or falling off of a tin coating at the end of the capacitor is likely to be accelerated, weldability of the capacitor is reduced, and the service life of the capacitor is prolonged. And the reliability of the capacitor is influenced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of capacitor detection, in particular to a capacitor life test clamp. BACKGROUND

[0002] Capacitors mainly play the roles of bypass, decoupling, filtering and energy storage in an alternating current circuit. With the pursuit of lightness, thinness and smallness of electronic devices, capacitors develop towards small size and large capacity, but higher requirements are put forward for the reliability, especially the life characteristics, of the capacitors. Therefore, life test is an indispensable link in capacitor sorting.

[0003] The utility model patent with the publication number CN215180322U proposes a capacitor life test clamp, which comprises a top layer, a buffer layer arranged on the bottom surface of the top layer, a first

[0004] elastic electric contact; wherein the first elastic electric contact is used for contacting one end of the capacitor; a bottom layer is arranged in a spaced relationship with the buffer layer and is used for contacting the other end of the capacitor; a fixing layer is arranged between the buffer layer and the bottom layer and is used for fixing the capacitor; wherein the first elastic electric contact and the bottom layer form a loop for applying a test voltage to the capacitor.

[0005] The above test clamp reduces the pressure applied to the end of the capacitor during the fixing process of the clamp by arranging the buffer layer on one side of the top layer. Meanwhile, the first elastic electric contact is arranged on the buffer layer. During the test, the first elastic electric contact contacts the end of the capacitor, which avoids the direct contact between the end of the capacitor and the top layer and ensures the good appearance of the capacitor. The problem that the traditional test clamp applies a certain pressure to the two ends of the capacitor during the fixing of the capacitor, the excessive pressure accelerates the oxidation or peeling of the tin plating layer of the end of the capacitor, reduces the solderability of the capacitor device, and affects the reliability of the capacitor is solved. The application solves the above technical problem by using another technical solution. Utility model content

[0006] The utility model aims at solving or at least alleviating the problem that the traditional test clamp applies a certain pressure to the two ends of the capacitor during the fixing of the capacitor, the excessive pressure accelerates the oxidation or peeling of the tin plating layer of the end of the capacitor, reduces the solderability of the capacitor device, and affects the reliability of the capacitor.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solution:

[0008] The utility model provides a capacitor life test fixture, including the clamping box with one end is equipped with the opening, be equipped with the clamping structure in the clamping box, four corners of upper and lower two sides of the clamping box are all fixedly connected with connecting rod, the one end of connecting rod away from the clamping box all is installed with detection equipment, the clamping structure includes the first clamping hole of opening in the upper and lower two sides of the clamping box, still includes the clamping plate of sliding connection in the inside of the clamping box, the second clamping hole of opening in the clamping plate, the inner wall of the sealing end of the clamping box is equipped with two containing groove, and the spring is embedded in the inside of two containing groove, and one end of spring is fixedly connected with the inner wall of containing groove, and the one end of spring is fixedly connected with the clamping plate outside containing groove.

[0009] Through adopting the above technical scheme, when using, first, the top plate is slid to a high position, the clamping plate is extruded in the inside of the clamping box until the second clamping hole is opposite the first clamping hole, at this time, the spring is in a compressed state, then the middle section of the capacitor to be detected is sequentially penetrated through the plurality of opposite first clamping holes and second clamping holes, the bottom end of the capacitor is inserted into the inside of the lower electrical connection pipe and is electrically connected with the lower electrical connection pipe, and the clamping plate is loosened, at this time, the spring pushes the clamping plate to the opening end of the clamping box under the action of the elastic force of the spring, so that the first clamping hole and the second clamping hole have a misalignment trend, thereby the capacitor is clamped and fixed from both sides through the side walls of the first clamping hole and the second clamping hole, after the fixation is completed, the user slides down the top plate, the upper electrical connection pipe installed at the bottom of the top plate is sleeved on the top end of the capacitor and is electrically connected with the capacitor, and the power supply line and the mobile power supply together form a loop for applying test voltage to the capacitor, so that the service life of the capacitor can be tested, since the capacitor is clamped and fixed through the side walls of the first clamping hole and the second clamping hole during the detection process, and the two ends of the capacitor are not subjected to clamping force, it is possible to avoid that the traditional test fixture exerts certain pressure on the two ends of the capacitor when fixing the capacitor, and excessive pressure can cause the tinning layer of the end of the capacitor to be oxidized or detached at a faster speed, which reduces the solderability of the capacitor and affects the reliability of the capacitor.

[0010] Optionally, the inner diameters of the first clamping holes and the second clamping holes are greater than the diameter of the capacitor, and the inner walls of the first clamping holes and the second clamping holes are bonded with buffer pads in a circular tube structure.

[0011] By setting the inner diameters of the first clamping holes and the second clamping holes to be relatively large, it is convenient to clamp the capacitor through the first clamping holes and the second clamping holes after the first clamping holes and the second clamping holes are aligned, and the buffer pads are arranged to protect the clamped part of the capacitor.

[0012] Optionally, the length of the spring is greater than the depth of the inner cavity of the spring, and the spring is in a compressed state when the first clamping hole and the second clamping hole are opposite.

[0013] By adopting the above technical scheme, when the middle section of the capacitor is inserted through the first clamping hole and the second clamping hole, the spring can push the clamping plate to the opening end of the clamping box under the elastic force of the spring, so that the first clamping hole and the second clamping hole are misaligned, and the capacitor is clamped and fixed from both sides by the side walls of the first clamping hole and the second clamping hole.

[0014] Optionally, guide grooves are formed in the inner walls on both sides of the clamping box, and guide blocks are formed on both sides of the clamping plate and are adapted in size to the inner cavities of the guide grooves, and the guide blocks are embedded in the guide grooves and are connected to the inner walls of the clamping box through the guide grooves.

[0015] By adopting the above technical scheme, the guide grooves and the guide blocks are provided to guide the clamping plate and avoid deviation of the clamping plate when sliding in the inner cavity of the clamping box.

[0016] Optionally, the detection device comprises a bottom plate fixedly connected to the connecting rod below the clamping box, a circuit board corresponding to a capacitor detection circuit is embedded in the bottom of the bottom plate, a plurality of lower electrically connected pipes corresponding to the first clamping hole are fixedly connected to the top of the bottom plate, and the lower electrically connected pipes are electrically connected to the circuit board.

[0017] By adopting the above technical scheme, the circuit board is provided to detect the capacitor, and the lower electrically connected pipes are provided to be sleeved on the lower end of the capacitor and electrically connected to the capacitor.

[0018] Optionally, the detection device further comprises a top plate slidably connected to the connecting rod above the clamping box, and a plurality of upper electrically connected pipes corresponding to the lower electrically connected pipes are fixedly connected to the lower surface of the top plate.

[0019] By adopting the above technical scheme, the top plate is provided to mount the upper electrically connected pipes, and the plurality of upper electrically connected pipes are connected in parallel, and after the capacitor is fixed, the user can slide the top plate to sleeve the upper electrically connected pipes on the upper end of the capacitor and electrically connect the capacitor.

[0020] Optionally, a screw ring is screwed on each of the four connecting rods between the top plate and the clamping box, a mobile power supply is arranged on one side of the clamping box, power lines are electrically connected to the positive and negative electrodes of the mobile power supply, and the two power lines are electrically connected to the circuit board and the upper electrically connected pipes, respectively.

[0021] By adopting the above technical scheme, the power line and the mobile power supply are arranged to supply power when the service life of the capacitor is detected, and the screw ring is arranged to limit the position of the top plate, so as to avoid the gravity of the top plate acting on the end of the capacitor as much as possible, thereby preventing the end of the capacitor from being damaged due to pressure.

[0022] In summary, the beneficial effects of the present application are as follows:

[0023] The capacitor middle section is inserted into the first clamping hole and the second clamping hole by pushing the clamping plate, and the clamping plate is loosened. Under the action of the spring force, the first clamping hole and the second clamping hole move to clamp the capacitor from both sides. The end of the capacitor is not subjected to clamping force, thereby avoiding the problem that the traditional test fixture exerts a certain pressure on both ends of the capacitor when fixing the capacitor, which easily accelerates the oxidation or peeling of the tin plating layer of the capacitor end, reduces the solderability of the capacitor device, and affects the reliability of the capacitor. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall cross-sectional structure of the present application;

[0025] Figure 2 is a schematic diagram of the three-dimensional structure of the clamping box of the present application;

[0026] Figure 3 is a schematic diagram of the connection structure of the clamping plate and the spring of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS: 1, clamping box; 2, first clamping hole; 3, clamping plate; 4, second clamping hole; 5, buffer pad; 6, containing groove; 7, spring; 8, guide groove; 9, guide block; 10, connecting rod; 11, bottom plate; 12, circuit board; 13, lower electrical connection pipe; 14, top plate; 15, upper electrical connection pipe; 16, screw ring; 17, power line; 18, mobile power supply. DETAILED DESCRIPTION

[0028] The following will be described in detail in combination with the accompanying Figures 1-3 The present application will be further described in detail.

[0029] Please refer to Figures 1-3 A capacitor life test fixture, comprising a clamping box 1 provided with an opening at one end, and a clamping structure arranged in the clamping box 1 for clamping and fixing the capacitor.

[0030] The connecting rods 10 are fixedly connected to the four corners of the upper and lower surfaces of the clamping box 1, and detection equipment is installed at the end of the connecting rod 10 away from the clamping box 1. After the capacitor is clamped and fixed, the user can detect the service life of the capacitor through the detection equipment.

[0031] The clamping structure comprises a plurality of first clamping holes 2 arranged opposite to each other on the upper and lower side walls of the clamping box 1, and a clamping plate 3 slidably connected inside the clamping box 1, wherein a plurality of second clamping holes 4 arranged opposite to the first clamping holes 2 are formed on the clamping plate 3.

[0032] Two accommodating grooves 6 are formed on the inner wall of the sealed end of the clamping box 1, and a spring 7 for applying a clamping force is embedded in each of the two accommodating grooves 6. One end of the spring 7 is fixedly connected to the inner wall of the accommodating groove 6, and the other end of the spring 7 is fixedly connected to the clamping plate 3.

[0033] Referring to Figure 2 and Figure 3 , the inner diameters of the first clamping holes 2 and the second clamping holes 4 are greater than the diameter of the capacitor, and a buffer pad 5 in the form of a circular tube is attached to the inner walls of the first clamping holes 2 and the second clamping holes 4. The inner diameters of the first clamping holes 2 and the second clamping holes 4 are set to be larger, which facilitates clamping the capacitor through the first clamping holes 2 and the second clamping holes 4 after the first clamping holes 2 and the second clamping holes 4 are aligned. The buffer pad 5 is provided to protect the clamped part of the capacitor.

[0034] Referring to Figure 1 , the length of the spring 7 is greater than the depth of the inner cavity of the spring 7, and the spring 7 is in a compressed state when the first clamping holes 2 and the second clamping holes 4 are aligned. When the middle section of the capacitor is inserted through the first clamping holes 2 and the second clamping holes 4, the spring 7 can push the clamping plate 3 in the direction of the open end of the clamping box 1 under the action of its own elastic force, causing the first clamping holes 2 and the second clamping holes 4 to be misaligned, thereby clamping and fixing the capacitor from both sides through the side walls of the first clamping holes 2 and the second clamping holes 4.

[0035] Referring to Figure 2 and Figure 3 , a guide groove 8 is formed on the inner wall of each side of the clamping box 1, and a guide block 9 is formed on both sides of the clamping plate 3 and has a size that matches the inner cavity of the guide groove 8. The guide block 9 is embedded in the guide groove 8 and is slidably connected to the inner wall of the clamping box 1 through the guide groove 8. The guide groove 8 and the guide block 9 are provided to guide the clamping plate 3 and avoid deviation of the clamping plate 3 when it slides in the inner cavity of the clamping box 1.

[0036] Referring to Figure 1 , the detection device comprises a bottom plate 11 fixedly connected to a connecting rod 10 below the clamping box 1, wherein a circuit board 12 corresponding to a capacitor detection circuit is embedded in the bottom of the bottom plate 11, and a plurality of lower electrically connected pipes 13 corresponding to the first clamping holes 2 are fixedly connected to the top of the bottom plate 11 and are electrically connected to the circuit board 12. The circuit board 12 is provided to detect the capacitor, and the lower electrically connected pipes 13 are provided to be sleeved on the lower end of the capacitor and electrically connected to the capacitor.

[0037] Referring to Figure 1 , the detection device further comprises a top plate 14 slidably connected to the connecting rods 10 above the clamping box 1, and a plurality of upper electrically connected pipes 15 corresponding to the lower electrically connected pipes 13 are fixedly connected to the lower surface of the top plate 14. The top plate 14 is provided for mounting the upper electrically connected pipes 15, and the plurality of upper electrically connected pipes 15 are connected in parallel. After the capacitor is fixed, the user can slide the top plate 14 downward to set the upper electrically connected pipes 15 on the top end of the capacitor to electrically connect with the capacitor.

[0038] Referring to Figure 3 , a screw ring 16 is screwed to each of the four connecting rods 10 between the top plate 14 and the clamping box 1, and a mobile power supply 18 is arranged on one side of the clamping box 1. The positive and negative electrodes of the mobile power supply 18 are electrically connected with power lines 17, and the two power lines 17 are electrically connected with the circuit board 12 and the upper electrically connected pipes 15, respectively. The power lines 17 and the mobile power supply 18 are provided for power supply during detection of the service life of the capacitor, and the screw ring 16 is provided for limiting the position of the top plate 14 to avoid the gravitational force of the top plate 14 acting on the end of the capacitor, which may cause the end of the capacitor to be damaged due to pressure.

[0039] The implementation principle of the present application is as follows: in use, first, slide the top plate 14 to a high position, and press the clamping plate 3 in the clamping box 1 until the second clamping hole 4 is opposite to the first clamping hole 2, at which time the spring 7 is in a compressed state. Then, the middle section of the capacitor to be detected is sequentially inserted through a plurality of aligned first clamping holes 2 and second clamping holes 4, so that the bottom end of the capacitor is inserted into the lower electrically connected pipe 13 and electrically connected with the lower electrically connected pipe 13, and the clamping plate 3 is released. At this time, the spring 7 pushes the clamping plate 3 in the direction of the opening end of the clamping box 1 under the action of its own elastic force, so that the first clamping hole 2 and the second clamping hole 4 tend to be misaligned, thereby clamping and fixing the capacitor from both sides through the side walls of the first clamping hole 2 and the second clamping hole 4. After the fixation is completed, the user slides the top plate 14 downward, so that the upper electrically connected pipes 15 mounted at the bottom of the top plate 14 are set on the top end of the capacitor to electrically connect with the capacitor, and together with the power lines 17 and the mobile power supply 18, form a loop for applying test voltage to the capacitor, so that the service life of the capacitor can be tested. Since the middle section of the capacitor is clamped and fixed by the side walls of the first clamping hole 2 and the second clamping hole 4 during detection, and the two ends of the capacitor are not subjected to clamping force, the problem that the traditional test fixture may exert a certain pressure on the two ends of the capacitor when fixing the capacitor is avoided, excessive pressure may cause the tinning layer of the end of the capacitor to be oxidized or detached at a faster rate, which reduces the solderability of the capacitor and affects the reliability of the capacitor.

[0040] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A capacitor life test fixture, comprising a clamping box (1) with an opening at one end, wherein a clamping structure is provided inside the clamping box (1), and connecting rods (10) are fixedly connected to the four corners on the upper and lower sides of the clamping box (1), and a testing device is installed at the end of each connecting rod (10) away from the clamping box (1), characterized in that: The clamping structure includes multiple first clamping holes (2) that are aligned with each other on the upper and lower side walls of the clamping box (1), and a clamping plate (3) that is slidably connected inside the clamping box (1). The clamping plate (3) has multiple second clamping holes (4) that are aligned with the first clamping holes (2). Two receiving grooves (6) are provided on the inner wall of the sealing end of the clamping box (1). A spring (7) is embedded in each of the two receiving grooves (6). One end of the spring (7) is fixedly connected to the inner wall of the receiving groove (6), and the other end of the spring (7) located outside the receiving groove (6) is fixedly connected to the clamping plate (3).

2. The capacitor life test fixture according to claim 1, characterized in that: The inner diameters of the first clamping hole (2) and the second clamping hole (4) are both larger than the diameter of the capacitor. The inner walls of the first clamping hole (2) and the second clamping hole (4) are both bonded with a buffer pad (5) in the shape of a round tube.

3. The capacitor life test fixture according to claim 1, characterized in that: The length of the spring (7) is greater than the depth of the inner cavity of the spring (7), and the spring (7) is in a compressed state when the first clamping hole (2) and the second clamping hole (4) are in relative position.

4. The capacitor life test fixture according to claim 1, characterized in that: Guide grooves (8) are provided on both sides of the inner wall of the clamping box (1). The clamping plate (3) extends outward on both sides to form guide blocks (9) that are adapted to the size of the inner cavity of the guide groove (8). The guide blocks (9) are embedded in the guide groove (8) and are slidably connected to the inner wall of the clamping box (1) through the guide groove (8).

5. A capacitor life test fixture according to claim 1, characterized in that: The detection device includes a base plate (11) fixedly connected to the connecting rod (10) located below the clamping box (1). The bottom of the base plate (11) is embedded with a circuit board (12) corresponding to the capacitor detection circuit. The top of the base plate (11) is fixedly connected with a plurality of lower electrical connecting tubes (13) corresponding to the first clamping hole (2). The lower electrical connecting tubes (13) are electrically connected to the circuit board (12).

6. A capacitor life test fixture according to claim 5, characterized in that: The testing equipment also includes a top plate (14) that is slidably connected to the connecting rod (10) above the clamping box (1), and a plurality of upper electrical connecting pipes (15) corresponding to the lower electrical connecting pipe (13) are fixedly connected to the lower surface of the top plate (14).

7. A capacitor life test fixture according to claim 6, characterized in that: Each of the four connecting rods (10) between the top plate (14) and the clamping box (1) is screwed with a threaded ring (16). A mobile power supply (18) is provided on one side of the clamping box (1). Power lines (17) are electrically connected to the positive and negative terminals of the mobile power supply (18). The two power lines (17) are electrically connected to the circuit board (12) and the upper electrical connection tube (15) respectively.

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