Stacked capacitor welding conveying mechanism

Abstract

The utility model discloses a stacked capacitor welding conveying mechanism which comprises a conveying platform, a pin wheel, a pin wheel driving piece and a pressing plate, a pin at the top of the pin wheel can penetrate through a first receding hole and is inserted into a conveying hole of a lead frame located on the conveying platform, and when the pin wheel driving piece drives the pin wheel to rotate, the pin wheel drives the pressing plate to rotate. The pin wheel can pull the lead frame to move towards the welding station between the pressing plate and the conveying platform. According to the conveying mechanism, the horizontal position and the conveying direction of the lead frame 1 can be limited through the matching mode of the needle and the conveying hole, the vertical position of the lead frame can be limited through the pressing plate, and therefore conveying and welding of the lead frame can be stably and reliably achieved.

Description

Technical Field

[0001] The present application relates to the technical field of stacked capacitor preparation equipment, and in particular to a stacked capacitor welding conveying mechanism. Background Art

[0002] The stacked capacitor is made of stacked foils, and multiple stacked capacitors are welded on a lead frame, which serves as the capacitor electrode.

[0003] When preparing stacked capacitors, foils need to be welded layer by layer on the lead frame. To ensure the welding reliability of the foils, it is necessary to ensure that the lead frame is accurately and stably positioned at the welding station and receives the welding operation. In traditional equipment, the lead frame is usually fixed by components such as suction cups and magnets, but this fixing method is not conducive to the correction of the lead frame and is not convenient for the transportation of the lead frame. Summary of the invention

[0004] The purpose of the present application is to overcome the deficiencies in the prior art and provide a stacked capacitor welding conveying mechanism.

[0005] To achieve the above technical objectives, the present application provides a stacked capacitor welding conveying mechanism, including: a conveying platform, used to receive the lead frame, the conveying platform is provided with a first avoidance hole; a pin wheel, arranged below the conveying platform, a plurality of pins are arranged on the wheel surface of the pin wheel, the pins at the top of the pin wheel can pass through the first avoidance hole and be inserted into the transmission hole of the lead frame on the conveying platform; a pin wheel driving member, used to drive the pin wheel to rotate so that the pin wheel drives the lead frame to feed; a pressure plate, arranged above the conveying platform, there is a gap between the conveying platform and the pressure plate, when the conveying platform receives the lead frame, the lead frame is in the gap.

[0006] Furthermore, the conveying platform includes: a receiving plate for receiving the lead frame; a first limiting plate and a second limiting plate, the receiving plate is arranged between the first limiting plate and the second limiting plate, and the receiving plate is lower than the first limiting plate and the second limiting plate.

[0007] Furthermore, a support bar is provided on the receiving plate, and when the receiving plate receives the lead frame, the lead frame is placed on the support bar.

[0008] Furthermore, the distance between the first limiting plate and the second limiting plate is adjustable, so that the receiving plate can receive lead frames of different widths.

[0009] Furthermore, a second avoidance hole is provided on the conveying platform, and the second avoidance hole is located at the welding station; after the pin wheel pulls the lead frame to the welding station, the welding mechanism can act on the lead frame through the second avoidance hole.

[0010] Furthermore, the stacked capacitor welding conveying mechanism includes two sets of pin wheels, the two sets of pin wheels are arranged at an interval, and the welding station is located between the two sets of pin wheels.

[0011] Furthermore, the spacing between the two sets of pin wheels is a multiple of the center distance between any two adjacent transmission holes on the lead frame.

[0012] Furthermore, the spacing between the two sets of pin wheels is no greater than the length of a lead frame, and the two sets of pin wheels can cooperate to hang the same lead frame.

[0013] Furthermore, the pressing plate is detachably arranged on the conveying platform.

[0014] Furthermore, the stacked capacitor welding conveying mechanism also includes: a first detection component, arranged at the feeding end of the conveying platform, for detecting whether a lead frame passes through; a second detection component, arranged at the discharging end of the conveying platform, for detecting whether a lead frame passes through.

[0015] The present application provides a stacked capacitor welding conveying mechanism, including a conveying platform, a needle wheel, a needle wheel driving member and a pressure plate. The needle on the top of the needle wheel can pass through a first avoidance hole and be inserted into a conveying hole of a lead frame on the conveying platform. When the needle wheel driving member drives the needle wheel to rotate, the needle wheel can pull the lead frame to move between the pressure plate and the conveying platform toward the welding station; the conveying mechanism can limit the horizontal position and conveying direction of the lead frame 1 by the matching form of the needle and the conveying hole, and can limit the vertical position of the lead frame by the pressure plate, thereby stably and reliably realizing the conveying and welding of the lead frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a stacked capacitor welding conveying mechanism provided in this application;

[0017] Figure 2 for Figure 1 The structural schematic diagram of the conveying platform in the stacked capacitor welding conveying mechanism shown;

[0018] Figure 3 for Figure 2 The structural schematic diagram of the back of the conveying platform shown;

[0019] Figure 4 for Figure 1 The schematic diagram of the working relationship between the receiving plate, the pin wheel and the lead frame in the stacked capacitor welding conveying mechanism shown;

[0020] Figure 5 for Figure 4 Magnified view of the structure within the middle circle. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] The present application provides a stacked capacitor welding conveying mechanism, including: a conveying platform 10, used to receive a lead frame 1, and a first avoidance hole 10a is provided on the conveying platform 10; a pin wheel 21, arranged below the conveying platform 10, and a plurality of pins are provided on the wheel surface of the pin wheel 21, and the pins at the top of the pin wheel 21 can pass through the first avoidance hole 10a and be inserted into the transmission hole 1a of the lead frame 1 on the conveying platform 10; a pin wheel driving member 22, used to drive the pin wheel 21 to rotate so that the pin wheel 21 drives the lead frame 1 to feed.

[0023] The conveying platform 10 may be any plate, block or other structure as long as it can stably and reliably support the lead frame 1. For example, Figure 1 and Figure 2 In the illustrated embodiment, the main body of the lead frame 1 is a sheet-like structure, approximately rectangular, and the conveying platform 10 is arranged in the shape of a long strip.

[0024] The conveying platform 10 extends from the loading station to the welding station. A loading mechanism is provided at the loading station, and a welding mechanism is provided at the welding station. When working, the loading mechanism inputs the lead frame 1 to be welded into the conveying platform 10. Under the traction of the pin wheel 21, the lead frame 1 can move along the conveying platform 10 to the welding station. When the part to be welded of the lead frame 1 enters the welding station and faces the working end of the welding mechanism, the welding mechanism can weld the foil to the lead frame 1.

[0025] Specifically, the pin wheel 21 and the pin wheel driving member 22 cooperate to realize the movement of the lead frame 1 on the conveying platform 10 .

[0026] For the convenience of explanation, please refer to Figure 4 and Figure 5 , a lead frame 1 and a needle wheel 21 are illustrated; in the illustrated embodiment, the main body of the lead frame 1 is a sheet-like structure, roughly rectangular, and along the width direction of the lead frame 1, a group of transmission holes 1a are respectively provided on both sides of the lead frame 1, and a group includes a plurality of transmission holes 1a arranged at equal intervals along the length direction of the lead frame 1; a plurality of needles are evenly spaced on the wheel surface of the needle wheel 21, and any needle is roughly conical, and the needle tip size of the needle is small and can be inserted into the transmission hole 1a; when the needle wheel 21 rotates, the needle can pull the lead frame 1 to move along its rotation direction.

[0027] The capacitor component is transported by the needle wheel 21, and the transportation can be achieved by utilizing the original structure of the lead frame 1; at the same time, the action position of the needle wheel 21 changes from time to time, and the lead frame 1 will not be damaged due to the force applied at a single position; and the traction of the needle wheel 21 will not pull the lead frame 1, the action position of the needle wheel 21 is small, and the friction with the lead frame 1 is small. In addition, the lead frame 1 can remain in a flat state and be pulled by the needle wheel 21 to move. Therefore, the needle wheel 21 can both reliably guide the lead frame 1 and well avoid damage to the lead frame 1 during transportation.

[0028] In order to conveniently drive the pinwheel 21 to rotate, the pinwheel driving member 22 can be a rotating driving member such as a rotary cylinder or a motor. In actual use, by driving the pinwheel driving member 22 forward or reverse, the pinwheel 21 can also be rotated clockwise or counterclockwise, thereby realizing the forward or backward movement of the lead frame 1, thereby meeting more diverse conveying needs.

[0029] because Figure 3 In the illustrated embodiment, two groups of transmission holes 1a are provided on the lead frame 1. Therefore, the conveying mechanism may adopt a single group of pin wheels 21, which are arranged and used corresponding to one of the groups of transmission holes 1a; or, the conveying mechanism may adopt two groups of pin wheels 21, which are arranged at intervals along the width direction of the lead frame 1 and correspond to the two groups of transmission holes 1a respectively, so as to ensure that the two groups of pin wheels 21 rotate synchronously and in the same direction (such as by connecting the pin wheels 21 in series with a linkage shaft), so as to synchronously apply traction force to both sides of the lead frame 1. When the width of the lead frame 1 to be welded is large, the traction on both sides is achieved by using two groups of pin wheels 21, which is beneficial to the balance and stability of the movement of the lead frame 1.

[0030] The pin wheel 21 can not only reliably pull the lead frame 1 to do feeding movement, but also limit the position and conveying direction of the lead frame 1 during the conveying process due to the insertion relationship between the pin and the conveying hole 1a, thereby improving the uniformity and reliability of the lead frame 1 conveying.

[0031] Furthermore, the stacked capacitor welding conveying mechanism provided in the present application also includes a pressure plate 31, which is arranged above the conveying platform 10. There is a gap between the conveying platform 10 and the pressure plate 31. When the conveying platform 10 receives the lead frame 1, the lead frame 1 is in the gap.

[0032] The lead frame 1 is placed in the gap, and the pressing plate 31 can prevent the lead frame 1 from moving in the vertical direction during transportation or welding, thereby further ensuring the transportation stability and welding stability of the lead frame 1.

[0033] The conveying platform 10 and the pressing plate 31 can be set in the shape of a channel with only the end open, and the open end is used to realize the loading and unloading of the lead frame 1, and the four walls of the channel can define the position of the lead frame 1 in the conveying mechanism, and the extension direction of the channel can define the conveying direction of the lead frame 1. Alternatively, the pressing plate 31 can be set only on one or both sides of the width direction of the lead frame 1. In this case, the projection of the pressing plate 31 on the conveying platform 10 can only cover the edge of the lead frame 1; in this way, the pressing plate 31 can limit the position of the lead frame 1 while exposing the part of the lead frame 1 used for welding foil to the outside, so as to facilitate welding operations and workers' observation.

[0034] For details, please refer to Figure 1 and Figure 2 In the illustrated embodiment, the conveying mechanism also includes a base 40, which is roughly in the shape of an inverted π, including a horizontal bottom plate and two vertical support plates, the two vertical support plates are arranged on the horizontal bottom plate at intervals, and cooperate to support the conveying platform 10; the conveying platform 10 is in the shape of an elongated strip, and a driving mounting plate is provided on one side of the conveying platform 10 in the width direction, and a pinwheel driving member 22 is provided on the driving mounting plate; the pinwheel driving member 22 includes a driving motor and a synchronous belt assembly, and the driving motor is linked to the pinwheel 21 through the synchronous belt assembly; the pinwheel 21 is rotatably arranged on the driving mounting plate and is located below the conveying platform 10; a first avoidance hole 10a in the shape of a long hole is provided on the conveying platform 10; the pinwheel 21 is positive The first avoidance hole 10a is provided, and the top of the needle wheel 21 passes through the first avoidance hole 10a; after the lead frame 1 enters the conveying platform 10, the portion of the lead frame 1 with the conveying hole 1a is exposed in the first avoidance hole 10a, and the needle on the top of the needle wheel 21 is inserted into the conveying hole 1a; a pressure plate 31 is also provided on the side of the conveying platform 10 where the first avoidance hole 10a is provided, and the pressure plate 31 is located above the lead frame 1 and can cover one side of the lead frame 1 in the width direction; the conveying mechanism can limit the horizontal position and conveying direction of the lead frame 1 by the matching form of the needle and the conveying hole 1a, and can limit the vertical position of the lead frame 1 by the pressure plate 31, thereby stably and reliably realizing the conveying and welding of the lead frame 1.

[0035] In a specific embodiment, the conveying platform 10 includes: a receiving plate 11, used to receive the lead frame 1; a first limiting plate 12 and a second limiting plate 13, the receiving plate 11 is arranged between the first limiting plate 12 and the second limiting plate 13, and the receiving plate 11 is lower than the first limiting plate 12 and the second limiting plate 13; when the conveying platform 10 receives the lead frame 1, the first limiting plate 12 and the second limiting plate 13 can cooperate to limit the position of the lead frame 1.

[0036] For details, please refer to Figure 2In the illustrated embodiment, the first limiting plate 12 and the second limiting plate 13 are respectively arranged on both sides of the receiving plate 11 in the width direction. Since the receiving plate 11 is lower than the first limiting plate 12 and the second limiting plate 13, the portion of the conveying platform 10 for receiving the lead frame 1 is in the shape of a groove; the groove structure can limit the position and movement direction of the lead frame 1, thereby unifying the conveying state and welding state of the lead frame 1.

[0037] In addition, the conveying platform 10 is provided with a split structure, which makes it easier to change and adjust parts according to the configuration and processing needs of the lead frame 1; since welding and conveying may cause part loss, the split structure can also facilitate the inspection and replacement of parts.

[0038] Optionally, a support bar 14 is provided on the receiving plate 11 , and when the receiving plate 11 receives the lead frame 1 , the lead frame 1 is placed on the support bar 14 .

[0039] For details, please refer to Figure 2 In the illustrated embodiment, two support bars 14 are arranged side by side on the receiving plate 11 along the width direction of the conveying platform 10, and any one of the support bars 14 is extended along the conveying direction of the lead frame 1; the two support bars 14 can cooperate to support the lead frame 1 so that the lead frame 1 is suspended on the receiving plate 11.

[0040] By providing the support bar 14 to support the lead frame 1, the contact area between the receiving plate 11 and the lead frame 1 can be reduced, thereby reducing the friction between the two and facilitating the feeding movement of the lead frame 1. At the same time, the support bar 14 can also reduce the gap between the conveying platform 10 and the pressing plate 31, and by raising the lead frame 1 and reducing the distance between the lead frame 1 and the pressing plate 31, the lead frame 1 is ensured to be restricted in the vertical direction.

[0041] Optionally, the support bar 14 is height-adjustable.

[0042] Specifically, the height of the support bar 14 can be changed by grinding the support bar 14; or, the support bar 14 can be set to a structure that is inflatable, foldable, telescopic, etc., which is convenient for height adjustment.

[0043] The height of the support bar 14 is adjustable so that the support bar 14 can support the lead frames 1 of different thickness specifications or different welding requirements at the required height position, thereby meeting more diverse lead frame 1 transportation needs.

[0044] Optionally, the distance between the first limiting plate 12 and the second limiting plate 13 is adjustable, so that the receiving plate 11 can receive lead frames 1 of different widths.

[0045] Specifically, the spacing between the first limiting plate 12 and the second limiting plate 13 can be adjusted by allowing at least one of the first limiting plate 12 and the second limiting plate 13 to move closer to or farther from the receiving plate 11 along the width direction.

[0046] When the distance between the first limiting plate 12 and the second limiting plate 13 increases, the conveying platform 10 can provide limiting support for the lead frame 1 with a larger width; when the distance between the first limiting plate 12 and the second limiting plate 13 increases, the conveying platform 10 can provide limiting support for the lead frame 1 with a smaller width. The distance between the first limiting plate 12 and the second limiting plate 13 is adjustable, which is conducive to improving the applicability of the conveying mechanism.

[0047] More specifically, the first limit plate 12 or the second limit plate 13 can be connected to the receiving plate 11 in a detachable and position-adjustable manner by means of the waist-shaped hole and the screw hole, or can be connected to the receiving plate 11 in a position-adjustable manner by means of a manual adjustment mechanism such as a screw rod or a micrometer. The present application does not limit the spacing adjustment method between the first limit plate 12 and the second limit plate 13.

[0048] Optionally, a second avoidance hole 10b is further provided on the conveying platform 10, and the second avoidance hole 10b is located at the welding station; after the pin wheel 21 pulls the lead frame 1 to the welding station, the welding mechanism can act on the lead frame 1 through the second avoidance hole 10b.

[0049] For details, please refer to Figure 1 and Figure 2 In the illustrated embodiment, the conveying platform 10 extends from the loading station to the unloading station and crosses the welding station; after the lead frame 1 enters the conveying platform 10 at the loading station, it is pulled by the pin wheel 21 and can reach the welding station along the conveying platform 10; after welding, the lead frame 1 can be finally output through the unloading station under the traction of the pin wheel 21. To ensure the reliability of welding, the welding mechanism includes two sets of upper and lower welding wheels, and the two sets of welding wheels can move relative to each other in the vertical direction; during welding, the two sets of welding wheels clamp the lead frame 1 and the foil in the thickness direction to achieve bidirectional welding; after welding, the two sets of welding wheels move away from each other and release the lead frame 1, so that the lead frame 1 can continue to feed.

[0050] In order to facilitate the movement of the lower welding wheel and cooperate with the upper welding wheel to achieve welding, a long second avoidance hole 10b is provided on the conveying platform 10 corresponding to the welding station; during welding, the positions to be welded of the lead frame 1 and the foil are exposed in the second avoidance hole 10b; the lower welding wheel can pass through the second avoidance hole 10b to contact the lead frame 1 and the foil.

[0051] Optionally, the stacked capacitor welding conveying mechanism provided in the present application includes two groups of pin wheels 21 , the two groups of pin wheels 21 are arranged at intervals, and the welding station is located between the two groups of pin wheels 21 .

[0052] For details, please refer to Figure 1In the illustrated embodiment, two groups of parallel pinwheels 21 are provided on one side of the conveying mechanism, and the two groups of pinwheels are arranged at intervals along the length direction of the lead frame 1, and any group of pinwheels 21 is independently driven by a group of pinwheel driving members 22. The two groups of pinwheels 21 are used to cooperate and pull the lead frame 1, so that the lead frame 1 can accurately, efficiently and smoothly perform feeding movement. Especially when the lead frame 1 has a certain length, the cooperation and pulling of the two groups of pinwheels 21 can avoid the lead frame 1 from moving as a whole due to the influence of external forces such as friction, thereby ensuring that the lead frame 1 remains flat and realizes stable tape running. Since each group of pinwheels 21 has an independent drive, during actual movement, if the strip-shaped lead frame 1 is uneven in its strip structure due to the speed difference during tape running, the tape running tension of the lead frame 1 can be ensured by changing the rotation speed of the pinwheels 21.

[0053] It is easy to understand that, if necessary, three or even more groups of pin wheels 21 can be provided on a single side of the conveying mechanism; or, multiple groups of pin wheels 21 can be provided on both sides of the conveying mechanism.

[0054] The present application does not limit the specific form and number of the pin wheel 21 and the pin wheel driving member 22 .

[0055] Optionally, the spacing between the two groups of pin wheels 21 is a multiple of the center distance between any two adjacent transmission holes 1 a on the lead frame 1 .

[0056] A plurality of transmission holes 1a in a group of transmission holes 1a on the lead frame 1 are arranged at equal intervals along the length direction; so that the spacing between two groups of needle wheels 21 arranged on the same side and spaced apart along the length direction is a multiple of the center distance between any two adjacent transmission holes 1a on the lead frame 1, and when the needles of the first group of needle wheels 21 are inserted into the transmission holes 1a and the lead frame 1 is fed to the second group of needle wheels 21 by rotation, the needles of the second group of needle wheels 21 can be easily inserted into the transmission holes 1a, thereby reliably realizing the cooperation of the two groups of needle wheels 21 in conveying the lead frame 1.

[0057] Optionally, the distance between the two sets of pin wheels 21 is no greater than the length of one lead frame 1 , and the two sets of pin wheels 21 can cooperate to hang the same lead frame 1 .

[0058] Only by ensuring that the two sets of pin wheels 21 arranged on the same side and spaced apart along the length direction can cooperate to hang the same lead frame 1 can the stability of the lead frame 1 during the transportation process be guaranteed.

[0059] Optionally, the pressing plate 31 is detachably disposed on the conveying platform 10 .

[0060] The pressing plate 31 can be fastened to the conveying platform 10 by screws, or can be arranged on the conveying platform 10 by a matching plug-in structure of a socket and a plug-in block, or can be arranged on the conveying platform 10 by a matching structure such as a buckle and a clamp, a slide groove and a slider. The present application does not limit the connection method between the pressing plate 31 and the conveying platform 10.

[0061] By making the pressing plate 31 detachable, it is possible to conveniently perform post-processing such as inspection and replacement of parts, and it is also possible to conveniently adjust the relative position of the pressing plate 31 and the conveying platform 10 to adjust the distance therebetween, so as to facilitate the vertical limitation of lead frames 1 with different thickness specifications or different welding requirements.

[0062] Optionally, the stacked capacitor welding conveying mechanism provided in the present application also includes: a first detection component 2, arranged at the feeding end of the conveying platform 10, for detecting whether a lead frame 1 passes through; a second detection component 3, arranged at the discharging end of the conveying platform 10, for detecting whether a lead frame 1 passes through.

[0063] Among them, the first detection member 2 and the second detection member 3 can adopt photoelectric sensors to confirm whether the lead frame 1 passes through the feeding end or the discharging end of the conveying platform 10 by reflecting or shooting light; or, the first detection member 2 and the second detection member 3 can adopt weight or pressure sensors to confirm whether the lead frame 1 passes through the feeding end or the discharging end of the conveying platform 10 by the size and change of force; or, the first detection member 2 and the second detection member 3 can adopt CCD cameras to confirm whether the lead frame 1 passes through the feeding end or the discharging end of the conveying platform 10 by shooting pictures.

[0064] The present application does not limit the specific configuration of the first detection member 2 and the second detection member 3. The present application also does not limit the installation positions of the first detection member 2 and the second detection member 3, as long as the detection end of the first detection member 2 acts on the feeding end of the conveying platform 10 and the detection end of the second detection member 3 acts on the discharging end of the conveying platform 10.

[0065] Figure 1In the illustrated embodiment, the conveying platform 10 includes a receiving plate 11, a first limiting plate 12 and a second limiting plate 13. Along the length direction of the receiving plate 11, the left end of the receiving plate 11 is its feeding end and the right end is its discharging end; a notch is respectively provided at the left end and the right end of the receiving plate 11, and the first detecting member 2 and the second detecting member 3 both adopt photoelectric sensors, and both detecting members are arranged below the receiving plate 11, and the detecting ends face the corresponding notches from bottom to top; when the lead frame 1 passes through the loading station and enters the conveying platform 10, it will block the feed end. Notch, in this way, the first detection piece 2 can detect that the lead frame 1 enters the conveying platform 10; in conjunction with the rotation efficiency of the pin wheel 21, according to the shielding time, the control system can calculate the running distance of the lead frame 1, thereby confirming whether the lead frame 1 runs to the welding station, so as to accurately control the welding node; when the lead frame 1 leaves the feed end, the notch at the feed end will be transformed from a shielding state to an unshielded state, so that the first detection piece 2 can detect that the lead frame 1 leaves the feed end, so that the control system can confirm whether the lead frame 1 is running normally. Similarly, when the lead frame 1 runs to the discharge end, the notch at the discharge end is blocked, and the second detection component 3 can detect that the lead frame 1 is leaving the conveying platform 10; in conjunction with the rotation efficiency of the needle wheel 21, the control system can calculate the running distance of the lead frame 1 according to the blocking time; when the lead frame 1 leaves the discharge end, the notch at the discharge end is no longer blocked, and the second detection component 3 can detect that the lead frame 1 leaves the discharge end, so that the control system can confirm that the lead frame 1 has completely left the conveying platform 10, so that the conveying platform 10 can convey the next lead frame 1.

[0066] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A stacked capacitor welding conveying mechanism, characterized in that: include: A conveying platform (10) is used to receive the lead frame (1), and a first avoidance hole (10a) is provided on the conveying platform (10); A needle wheel (21) is disposed below the conveying platform (10), a plurality of needles being disposed on a wheel surface of the needle wheel (21), and the needles at the top of the needle wheel (21) are capable of passing through the first avoidance holes (10a) and being inserted into the conveying holes (1a) of the lead frame (1) on the conveying platform (10); A pinwheel driving member (22) is used to drive the pinwheel (21) to rotate, so that the pinwheel (21) drives the lead frame (1) to feed; A pressing plate (31) is arranged above the conveying platform (10), and a gap is provided between the conveying platform (10) and the pressing plate (31). When the conveying platform (10) receives the lead frame (1), the lead frame (1) is located in the gap.

2. The stacked capacitor welding conveying mechanism according to claim 1, characterized in that: The conveying platform (10) comprises: A receiving plate (11) for receiving the lead frame (1); A first limiting plate (12) and a second limiting plate (13), wherein the receiving plate (11) is arranged between the first limiting plate (12) and the second limiting plate (13), and the receiving plate (11) is lower than the first limiting plate (12) and the second limiting plate (13).

3. The stacked capacitor welding conveying mechanism according to claim 2, characterized in that: A support bar (14) is provided on the receiving plate (11); when the receiving plate (11) receives the lead frame (1), the lead frame (1) is located on the support bar (14).

4. The stacked capacitor welding conveying mechanism according to claim 2, characterized in that: The distance between the first limiting plate (12) and the second limiting plate (13) is adjustable, so that the receiving plate (11) can receive lead frames (1) of different widths.

5. The stacked capacitor welding conveying mechanism according to claim 1, characterized in that: The conveying platform (10) is also provided with a second avoidance hole (10b), and the second avoidance hole (10b) is located at the welding position; After the pin wheel (21) pulls the lead frame (1) to the welding station, the welding mechanism can act on the lead frame (1) through the second avoidance hole (10b).

6. The stacked capacitor welding conveying mechanism according to claim 1, characterized in that: It comprises two groups of pin wheels (21), the two groups of pin wheels (21) are arranged at an interval, and the welding station is located between the two groups of pin wheels (21).

7. The stacked capacitor welding conveying mechanism according to claim 6, characterized in that: The spacing between the two groups of pin wheels (21) is a multiple of the center distance between any two adjacent transmission holes (1a) on the lead frame (1).

8. The stacked capacitor welding conveying mechanism according to claim 6, characterized in that: The distance between the two groups of needle wheels (21) is no greater than the length of a lead frame (1), and the two groups of needle wheels (21) can cooperate to hang the same lead frame (1).

9. The stacked capacitor welding conveying mechanism according to claim 1, characterized in that: The pressing plate (31) is detachably arranged on the conveying platform (10).

10. The stacked capacitor welding conveying mechanism according to claim 1, characterized in that: Also includes: A first detection component (2) is arranged at the feeding end of the conveying platform (10) and is used to detect whether a lead frame (1) passes through; A second detection component (3) is provided at the discharge end of the conveying platform (10) and is used to detect whether a lead frame (1) passes through.

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