Capacitor lead welding strength detection device

Abstract

The invention discloses a capacitor lead welding strength detection device, and relates to the technical field of capacitors, the capacitor lead welding strength detection device comprises a detection seat and a capacitor body, the bottom of the capacitor body is fixedly connected with two symmetrical welding leads, the top of the detection seat is provided with a circular groove, and the top of the capacitor body is transversely provided with a connecting groove. A circular groove is formed in the capacitor body and transversely cut off by the connecting groove, two limiting holes which are symmetrical left and right are formed in the circular groove and located in the two sides of the connecting groove, and a strength detection control mechanism is transversely and movably connected to the interior of the capacitor body. Through the arranged strength detection control mechanism, a welding lead can be straightened before the welding connection position is detected, it is avoided that the detection accuracy is affected by lead bending during follow-up operation, the equipment operation difficulty is lowered, the welding borne pulling force is calculated in sequence according to the rotating angle of a control panel, and the welding connection strength is calculated conveniently.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of capacitors, and particularly relates to a capacitor lead welding strength detection device. BACKGROUND

[0002] Two conductors close to each other with an insulating medium in between constitute a capacitor. When a voltage is applied between the two plates of the capacitor, the capacitor will store electric charges, and the capacitance of the capacitor is equal to the amount of electric charges on the conductive plate and the voltage between the two plates.

[0003] Referring to Chinese invention patent CN118706588A, a capacitor lead welding strength detection device is disclosed, which belongs to the technical field of detection equipment and comprises a base, a push block and a capacitor. A group of supports are fixedly installed at the rear end of the base, a group of electric telescopic rods are fixedly installed at the top of the supports, a main rack is fixedly installed on the transmission shaft of the electric telescopic rods, the capacitor is installed on the base, and the upper two groups of pins of the capacitor are arranged at the two ends of the two groups of separation plates. The device can automatically separate and expand the two groups of pins outward and clamp and fix the pins, thereby effectively improving the working efficiency of the device. The device can detect the welding strength of the pins by driving the fixed plate to move outward through the detection screw and cooperating with the pressure sensor, thereby effectively improving the detection effect of the device. The device can automatically separate and expand the two groups of pins of the capacitor outward and clamp and fix the pins and the capacitor respectively to detect the welding strength of the pins of the capacitor. However, there are still some problems in actual use. The capacitor generally has two welding leads welded by a welding machine at the bottom as the connecting wire. However, during the production of the capacitor, the connection strength between the capacitor and the welding lead is checked to avoid the separation of the capacitor from the lead due to the tension of the lead during the later use and installation, thereby affecting the product quality. However, the existing detection method is single and inconvenient for calculating the welding strength, and the lead or the capacitor is easily separated from the detection equipment during detection. SUMMARY

[0004] TECHNICAL PROBLEM The purpose of the application is to solve the problem that the connection strength between the capacitor and the welding lead is checked during the production of the capacitor to avoid the separation of the capacitor from the lead due to the tension of the lead during the later use and installation, thereby affecting the product quality. However, the existing detection method is single and inconvenient for calculating the welding strength, and the lead or the capacitor is easily separated from the detection equipment during detection. TECHNICAL SCHEME

[0005] In order to achieve the above object, the application provides the following technical scheme: a capacitor lead welding strength detection device, comprising a detection seat and a capacitor body, the bottom of the capacitor body is fixedly connected with two symmetrical welding leads, the top of the detection seat is provided with a circular groove, the top of the capacitor body is transversely provided with a connecting groove, and the connecting groove transversely cuts off the circular groove, two left-right symmetrical limiting holes are formed in the circular groove, and the limiting holes are located on the two sides of the connecting groove; The capacitor body is transversely movably connected with a strength detection control mechanism, the connecting groove is movably connected with a strength test mechanism, and the bottom of the detection seat is movably connected with a fastening mechanism.

[0006] Further, the strength detection control mechanism comprises a control disc, a control bar, a pushing bar, a limiting bar and a reset spring, the pushing bar is located on the inner side of the control disc, the limiting bar is located on the outer side of the control disc, the ends of the pushing bar and the limiting bar, away from the control disc, are movably connected to one side of the control bar through shafts, one end of the reset spring is fixedly connected to the middle position of the outer side of the pushing bar, and the other end of the reset spring is fixedly connected to the middle position of the outer side of the limiting bar.

[0007] Further, the outer side of the control disc is provided with a limiting tooth, and the inner side of the control disc is provided with a pushing tooth, and the pushing tooth and the limiting tooth are both inclined, Further, the end of the limiting bar, away from the control disc, is located on the inner side of the limiting tooth in a bent shape, and the end of the pushing bar, away from the control bar, extends to the inner side of the pushing tooth.

[0008] Further, the strength detection control mechanism further comprises a driving shaft, a connecting frame and a driving wheel, the driving shaft transversely penetrates through the connecting seat, and the connecting part of the driving shaft and the detection seat is movably connected through a bearing, the connecting frame is fixedly connected to one end of the driving shaft, and one side of the control disc is fixedly connected to one side of the connecting frame, the driving wheel is provided with two bending tail-shaped driving wheels located on the two sides of the detection seat, and the driving wheels are fixedly connected to the outer sides of the driving shaft.

[0009] Further, the strength test mechanism comprises a test bar, a driving bar, a stretching spring and a guide wheel, the driving bar is provided with two groups and is symmetrically rotatably connected to the bottom of the test bar, the outer sides of the bottom of the test bar are movably connected with guide wheels, and the top end of the stretching spring is fixedly connected to the middle position of the test bar.

[0010] Further, the test bar is located in the connecting groove, and the two ends of the test bar are placed on the surface of the driving wheel, the bottom end of the reset spring is fixedly connected to the middle position of the inner bottom of the connecting groove, two mutually symmetrical sliding grooves are formed in the inner part of the connecting groove, and the guide wheels are slidingly connected in the inner part of the sliding grooves.

[0011] Further, the fastening mechanism comprises a driving motor, a driving disc, a limiting piece, a contact piece and a limiting bolt, the driving disc is fixedly connected to the output end of the servo motor, and the limiting pieces are symmetrically arranged and fixedly connected to the outer side of the driving disc, the contact pieces are provided in two, and the limiting bolts are respectively connected to the outer side of the contact pieces through threads.

[0012] Further, the driving disc is movably connected to the bottom end of the detection seat through a rotating shaft on the side away from the driving motor, and the opposite sides of the limiting piece and the contact piece are both provided with an arc, Further, the welding lead is located on the opposite side of the limiting piece and the contact piece, and the limiting bolt is movably connected to the limiting piece through threads.

[0013] Compared with the prior art, the capacitor lead welding strength detection device has the following beneficial effects: First, the strength detection control mechanism is provided, the control bar is pulled back to make the limiting bar and the pushing bar respectively fall off the limiting teeth and the pushing teeth, the reset spring pulls the pushing teeth away from one end of the control bar to lift up to above the initial pushing teeth, then the control bar is pushed forward to make it inserted into the opposite pushing teeth, and the control disc rotates by one scale, in this process, the limiting bar moves back by one limiting tooth and is clamped to the inner side, the control disc rotates in the same direction to drive the driving shaft through the connecting frame, then the driving wheel pushes up the test bar, which is beneficial to detect the straight welding lead in front of the welding connection, avoids the influence of the lead bending on the detection accuracy in subsequent operation, and is also beneficial to reduce the operation difficulty of the equipment, the pulling force borne by the welding is calculated according to the rotation angle of the control disc, and the welding connection strength is calculated conveniently.

[0014] Second, the strength test mechanism is provided, the test bar pulls the driving bar up to slide in the chute through the guide wheel, and the extension spring is passively stretched and elongated, and the above-mentioned control bar is pulled repeatedly until the driving wheel pushes the test bar to make the welding lead of the test bar and the capacitor body separate from each other, which is beneficial to apply a pushing force to the capacitor body to detect the welding lead connection strength.

[0015] Third, the fastening mechanism is provided, the driving motor is started to drive the driving disc to rotate, so as to drive the limiting piece to move to the welding lead until the inner side is tightly attached to the contact piece, at this time, the driving motor is stopped, and the limiting bolts are respectively rotated to tighten the limiting piece and the contact piece, so as to limit the welding lead on the opposite side of the limiting piece and the contact piece, which is beneficial to quickly limit the welding lead and avoid that the capacitor body and the welding lead fall off the detection equipment during the welding strength detection.

[0016] Additional advantages, objects, and features of the application will be apparent to those skilled in the art upon examination of the following detailed description of the application and the accompanying drawings in which: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the perspective structure of the present application; Figure 2 is a schematic view of the bottom perspective structure of the present application; Figure 3 is a schematic view of the connecting slot profile connecting structure of the present application; Figure 4 is a schematic view of the soldering lead connecting structure of the present application; Figure 5 is a schematic view of the strength detection control mechanism structure of the present application; Figure 6 is a schematic view of the driving shaft connecting of the present application; Figure 7 is a schematic view of the driving shaft connecting of the present application; Figure 6 is a schematic view of the enlarged structure at A in the present application; Figure 8 is a schematic view of the enlarged structure at B in the present application; Figure 3

[0018] In the figure: 1, detection seat; 2, capacitor body; 3, soldering lead; 4, circular slot; 5, connecting slot; 6, limiting hole; 7, strength detection control mechanism; 701, control disc; 702, control bar; 703, push bar; 704, limiting bar; 705, reset spring; 706, driving shaft; 707, connecting frame; 708, driving wheel; 8, strength testing mechanism; 801, testing bar; 802, driving bar; 803, tension spring; 804, guide wheel; 9, fastening mechanism; 901, driving motor; 902, driving disc; 903, limiting piece; 904, contact piece; 905, limiting bolt; 10, limiting tooth; 11, push tooth; 12, sliding groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] As Figures 1-8 ​​As shown, the present application provides a technical solution: a capacitor lead welding strength detection device, comprising a detection seat 1 and a capacitor body 2, the bottom of the capacitor body 2 is fixedly connected with two symmetrical welding leads 3, the top of the detection seat 1 is provided with a circular groove 4, the top end of the capacitor body 2 is transversely provided with a connecting groove 5, and the connecting groove 5 transversely cuts off the circular groove 4, two left and right symmetrical limiting holes 6 are formed in the circular groove 4, and the limiting holes 6 are located on both sides of the connecting groove 5, the circular groove 4 at the top of the detection seat 1 matches the shape of the bottom of the capacitor body 2, ensuring the stability when the capacitor is placed vertically, the limiting hole 6 is designed with a tapered inlet, facilitating the welding lead 3 to be quickly inserted and automatically positioned, reducing the manual adjustment time, and the connecting groove 5 transversely penetrates the detection seat 1, and the width is slightly larger than the thickness of the test strip 801, avoiding errors caused by friction during the test process; In the embodiment, the key components such as the driving wheel and the guide wheel are made of wear-resistant alloy steel, the service life is more than 100,000 times, the maintenance cost is reduced by 60%, the device solves the core pain points of low efficiency, large error and poor adaptability in traditional detection through the deep integration of mechanical transmission, mechanical matching and automatic control, and provides an efficient, accurate and reliable welding strength detection solution for the capacitor manufacturing industry.

[0021] The capacitor body 2 is transversely movably connected with a strength detection control mechanism 7, the inside of the connecting groove 5 is movably connected with a strength test mechanism 8, and the bottom of the detection seat 1 is movably connected with a fastening mechanism 9; the driving motor 901 is a micro stepping motor, which drives the limiting part 903 and the contact part 904 to move synchronously to the welding lead 3 through the rotation of the driving disc 902, forming a three-point clamping structure; the limiting bolt 905 is designed with a screw fine adjustment, which can be further locked after clamping to prevent loosening caused by vibration during the detection process; an integrated touch screen controller is provided, and users can input capacitor model, preset tension threshold and other parameters, and the device automatically matches the detection program.

[0022] As Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the strength detection control mechanism 7 comprises a control disc 701, a control bar 702, a pushing bar 703, a limiting bar 704 and a reset spring 705. The pushing bar 703 is located at the inner side of the control disc 701, and the limiting bar 704 is located at the outer side of the control disc 701. The ends of the pushing bar 703 and the limiting bar 704 away from the control disc 701 are respectively movably connected to one side of the control bar 702 through rotating shafts. One end of the reset spring 705 is fixedly connected to the middle position of the outer side of the pushing bar 703, and the other end of the reset spring 705 is fixedly connected to the middle position of the outer side of the limiting bar 704. The outer side of the control disc 701 is provided with limiting teeth 10, and the inner side of the control disc 701 is provided with pushing teeth 11. Both the limiting teeth 10 and the pushing teeth 11 are obliquely provided. The end of the limiting bar 704 away from the control disc 701 is located at the inner side of the limiting teeth 10 in a bent shape, and the end of the pushing bar 703 away from the control bar 702 extends to the inner side of the pushing teeth 11. The strength detection control mechanism 7 further comprises a driving shaft 706, a connecting frame 707 and driving wheels 708. The driving shaft 706 transversely penetrates the connecting seat and is movably connected to the connecting part of the detection seat 1 through a bearing. The connecting frame 707 is fixedly connected to one end of the driving shaft 706, and one side of the control disc 701 is fixedly connected to one side of the connecting frame 707. The driving wheels 708 are provided with two bent tails located at the two sides of the detection seat 1 and are fixedly connected to the outer sides of the driving shaft 706 in the shaft centers, respectively. The oblique angle of the limiting teeth 10 is designed to be 15°-20°, so as to ensure that the limiting bar 704 can be quickly reset when it is separated. The oblique angle of the pushing teeth 11 is 25°-30°, so as to improve the pushing efficiency of the control bar 702. The driving shaft 706 is rigidly connected to the control disc 701 through the connecting frame 707, so as to ensure accurate transmission of the rotating angle. The stiffness coefficient of the reset spring 705 is set to be in a low elastic range, such as 0.5-1 N / mm, so as to ensure that the control bar 702 operates gently when it is reset, thereby reducing the abrasion of the mechanism.

[0023] By pulling the control bar 702 backward, the limiting bar 704 and the pushing bar 703 are respectively separated from the limiting teeth 10 and the pushing teeth 11. The reset spring 705 pulls the pushing teeth 11 away from the end of the control bar 702 upward to the upper side of the initial pushing teeth 11. Then, the control bar 702 is pushed forward, so that it is inserted into the inner side of the opposite pushing teeth 11. At the same time, the control disc 701 rotates by one scale. In this process, the limiting bar 704 moves backward by one limiting tooth 10 and is clamped to the inner side thereof. The control disc 701 rotates in the same direction by driving the driving shaft 706 through the connecting frame 707. Then, the driving wheels 708 are upwardly pressed against the test strip 801, which is beneficial to detect the straight welding lead 3 in front of the welding connection and avoid the bending of the lead in the subsequent operation, so as to avoid the influence of the bending of the lead on the detection accuracy. In addition, it is beneficial to reduce the difficulty of the operation of the equipment. According to the rotating angle of the control disc 701, the pulling force borne by the welding is sequentially calculated, so as to facilitate the calculation of the welding connection strength.

[0024] AsFigure 3 and Figure 8 As shown in the figure, the strength testing mechanism 8 includes a test strip 801, a driving strip 802, a tension spring 803 and a guide wheel 804, the driving strip 802 is provided with two groups and is symmetrically connected to the bottom of the test strip 801, and the guide wheel 804 is movably connected to the outside of the bottom of the test strip 801, the top end of the tension spring 803 is fixedly connected to the middle position of the test strip 801, the test strip 801 is located inside the connecting groove 5, and the two ends of the test strip 801 are placed on the surface of the driving wheel 708, the bottom end of the reset spring 705 is fixedly connected to the middle position of the inside bottom end of the connecting groove 5, two mutually symmetrical sliding grooves 12 are opened in the inside of the connecting groove 5, and the guide wheel 804 is slidably connected to the inside of the sliding groove 12, and the stiffness coefficient of the tension spring 803 is set to be in a high elasticity interval such as 3-5 N / mm, so as to provide sufficient reverse tension when the test strip 801 is lifted, accurately simulate the actual stress state of the welding lead 3, the guide wheel 804 is coated with polytetrafluoroethylene, the sliding groove 12 is embedded with a stainless steel guide rail, the friction coefficient is less than 0.05, and the test strip 801 moves smoothly, and different sizes of the limiting hole 6 and the test strip 801 can be replaced to adapt to the welding lead detection with a diameter of 0.5-3 mm.

[0025] The driving strip 802 is pulled upward by the test strip 801 to slide in the sliding groove 12 through the guide wheel 804, and at the same time, the tension spring 803 is passively stretched and elongated, and the above-mentioned pulling control strip 702 is repeated until the driving wheel 708 abuts against the test strip 801, so that the welding lead 3 is separated from the capacitor body 2, which is beneficial to apply a pushing force to the capacitor body 2, so as to detect the connection strength of the welding lead 3.

[0026] As shown in the figure, Figure 3 and Figure 4 As shown in the figure, the fastening mechanism 9 includes a driving motor 901, a driving disc 902, a limiting piece 903, a contact piece 904 and a limiting bolt 905, the driving disc 902 is fixedly connected to the output end of the servo motor, the limiting pieces 903 are symmetrically arranged and fixedly connected to the outside of the driving disc 902, the contact pieces 904 are provided with two, and the limiting bolts 905 are respectively threadedly connected to the outside of the contact pieces 904, the side of the driving disc 902 away from the driving motor 901 is movably connected to the bottom end of the detection seat 1 through a rotating shaft, the opposite sides of the limiting piece 903 and the contact piece 904 are both provided with an arc shape, the welding lead 3 is located on the opposite sides of the limiting piece 903 and the contact piece 904, and the limiting bolt 905 is movably connected with the limiting piece 903 through a thread.

[0027] By starting the drive motor 901 to drive the drive disc 902 to rotate, thereby driving the limiting piece 903 to move to the welding lead 3 until the inner side is close to the contact piece 904, at this time stop the drive motor 901, and rotate the limiting bolt 905 respectively to tighten the limiting piece 903 and the contact piece 904 connection, limit the welding lead 3 on the opposite side of the limiting piece 903 and the contact piece 904, which is beneficial to quickly limit the welding lead 3, and avoid the capacitor body 2 and the welding lead 3 from falling off the detection equipment during the welding strength detection.

[0028] Working principle: when in use, align the bottom of the welded capacitor body 2 with the circular groove 4, and align the welding lead 3 with the limiting hole 6, then insert the welding lead 3 into the limiting hole 6 until its bottom end extends out of the detection seat 1 bottom, at this time start the drive motor 901 to drive the drive disc 902 to rotate, thereby driving the limiting piece 903 to move to the welding lead 3 until the inner side is close to the contact piece 904, at this time stop the drive motor 901, and rotate the limiting bolt 905 respectively to tighten the limiting piece 903 and the contact piece 904 connection, limit the welding lead 3 on the opposite side of the limiting piece 903 and the contact piece 904, then pull the control bar 702 backward to make its limiting bar 704 and pushing bar 703 fall off the limiting teeth 10 and pushing teeth 11 respectively, the reset spring 705 pulls the pushing teeth 11 away from one end of the control bar 702 to lift up to the initial pushing teeth 11 above, then push the control bar 702 forward, make it inserted into the opposite pushing teeth 11 inside, at the same time the control disc 701 rotates a scale, in this process the limiting bar 704 moves backward one limiting tooth 10 and is clamped to the inner side, the control disc 701 rotates at the same time drives the drive shaft 706 in the same direction through the connecting frame 707, then the drive wheel 708 is pushed up against the test bar 801, at this time the test bar 801 pulls the drive bar 802 upward through the guide wheel 804 in the sliding groove 12 to the equivalent sliding, at the same time the tension spring 803 is passively stretched and lengthened, repeat the above pull the control bar 702 until the drive wheel 708 pushes the test bar 801 to make its welding lead 3 and the capacitor body 2 separate from each other.

[0029] It should be noted that, in this article, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected", "linked" should be understood in a broad sense, for example, "mounted" can be fixed connection, can also be detachable connection, or integral connection; "connected" can be mechanical connection, can also be electrical connection; "connected" can be directly connected, can also be indirectly connected through an intermediate medium, or the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A capacitor lead bonding strength detection device comprising a detection seat (1) and a capacitor body (2), characterized in that: The bottom of the capacitor body (2) is fixedly connected with two symmetrical welding leads (3), the top of the detection seat (1) is provided with a circular groove (4), the top of the capacitor body (2) is transversely provided with a connecting groove (5), the connecting groove (5) transversely cuts off the circular groove (4), two left and right symmetrical limiting holes (6) are formed in the circular groove (4), and the limiting holes (6) are located on the two sides of the connecting groove (5). The capacitor body (2) is transversely movably connected with a strength detection control mechanism (7), the connecting groove (5) is movably connected with a strength test mechanism (8), and the bottom of the detection seat (1) is movably connected with a fastening mechanism (9).

2. The capacitor lead bond strength inspection apparatus according to claim 1, characterized by: The strength detection control mechanism (7) comprises a control disc (701), a control bar (702), a pushing bar (703), a limiting bar (704) and a reset spring (705), the pushing bar (703) is located on the inner side of the control disc (701), the limiting bar (704) is located on the outer side of the control disc (701), and the ends, away from the control disc (701), of the pushing bar (703) and the limiting bar (704) are movably connected to one side of the control bar (702) through rotating shafts, one end of the reset spring (705) is fixedly connected to the middle position of the outer side of the pushing bar (703), and the other end of the reset spring (705) is fixedly connected to the middle position of the outer side of the limiting bar (704).

3. The apparatus for detecting the strength of a capacitor lead weld according to claim 2, wherein: The outer side of the control disc (701) is provided with a limiting tooth (10), and the inner side of the control disc (701) is provided with a pushing tooth (11), and the pushing tooth (11) and the limiting tooth (10) are both inclined.

4. The apparatus for detecting the strength of a capacitor lead weld of claim 2, wherein: The end, away from the control disc (701), of the limiting bar (704) is located on the inner side of the limiting tooth (10) in a bent manner, and the end, away from the control bar (702), of the pushing bar (703) extends to the inner side of the pushing tooth (11).

5. The apparatus for detecting the strength of a capacitor lead weld of claim 2, wherein: The strength detection control mechanism (7) further comprises a driving shaft (706), a connecting frame (707) and a driving wheel (708), the driving shaft (706) transversely penetrates the connecting seat, the connecting position of the driving shaft (706) and the detection seat (1) is movably connected through a bearing, the connecting frame (707) is fixedly connected to one end of the driving shaft (706), and one side of the control disc (701) is fixedly connected to one side of the connecting frame (707), the driving wheel (708) is provided with two bending tail-shaped driving wheels located on the two sides of the detection seat (1), and the driving wheels (708) are fixedly connected to the outer sides of the driving shafts (706) in pairs.

6. The apparatus for detecting the strength of a capacitor lead weld of claim 1, wherein: The strength test mechanism (8) comprises a test bar (801), a driving bar (802), a stretching spring (803) and a guide wheel (804), the driving bar (802) is provided with two groups and is symmetrically rotatably connected to the bottom of the test bar (801), the outer sides of the bottom of the test bar (801) are movably connected with the guide wheels (804), and the top end of the stretching spring (803) is fixedly connected to the middle position of the test bar (801).

7. The apparatus for detecting the strength of a capacitor lead weld of claim 5, wherein: The test strip (801) is located inside the connecting groove (5), and both ends of the test strip (801) are placed on the surface of the driving wheel (708), the bottom end of the reset spring (705) is fixedly connected to the middle position of the bottom end inside the connecting groove (5), two symmetrical sliding grooves (12) are arranged in the inside of the connecting groove (5), and the guide wheel (804) is slidingly connected to the inside of the sliding groove (12).

8. The apparatus for detecting the strength of a capacitor lead weld of claim 1, wherein: The fastening mechanism (9) comprises a driving motor (901), a driving disc (902), a limiting piece (903), a contact piece (904) and a limiting bolt (905), the driving disc (902) is fixedly connected to the output end of the servo motor, the limiting pieces (903) are symmetrically arranged and fixedly connected to the outer side of the driving disc (902), the contact pieces (904) are provided with two, and the limiting bolts (905) are respectively connected to the outer sides of the contact pieces (904) through threads.

9. The apparatus for detecting the strength of a capacitor lead weld of claim 8, wherein: The driving disc (902) is movably connected to the bottom end of the detection seat (1) on the side away from the driving motor (901), and the opposite sides of the limiting pieces (903) and the contact pieces (904) are both provided with arc shapes.

10. The apparatus for detecting the strength of a capacitor lead weld of claim 1, wherein: The welding lead (3) is located on the opposite sides of the limiting pieces (903) and the contact pieces (904), and the limiting bolts (905) are movably connected to the limiting pieces (903) through threads.

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