Stacked capacitor welding mechanism

Abstract

The laminated capacitor welding mechanism comprises an upper welding piece, a lower welding piece, a lifting driving assembly and a power supply assembly, and the lifting driving assembly is used for driving the upper welding piece and the lower welding piece to get close to each other or get away from each other so that the upper welding piece and the lower welding piece can act on a capacitor assembly conveniently. The power supply assembly is used for electrifying the upper weldment and the lower weldment, so that the electric fusion welding of the capacitor assembly is realized; electric energy is converted into heat energy through electric fusion welding, materials can be instantly heated to the melting point, and the welding efficiency is high; meanwhile, the two faces of the capacitor assembly are synchronously welded through double-point operation of the upper welding piece and the lower welding piece, the front face and the back face of the capacitor assembly are both subjected to the hot melting effect, the welding effect is good, and even if foil pieces are increased layer by layer, the reliable welding effect can be guaranteed all the time due to the fact that the upper portion and the lower portion of the welding portion can be affected by stable high temperature.

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 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, multiple layers of foil need to be welded at each welding position of the lead frame. As the number of foil layers increases, the welding effect of the later welded foil is poor and the welding time required increases. Especially when using a traditional single-sided welder, as the number of welded foil layers increases, the welding condition between the lead frame and the foil is difficult to guarantee. 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 mechanism.

[0005] To achieve the above technical objectives, the present application provides a stacked capacitor welding mechanism, including: an upper welding piece for welding the front side of the capacitor assembly; a lower welding piece for welding the back side of the capacitor assembly; a lifting and driving assembly for driving the upper welding piece and the lower welding piece to move closer to or away from each other; a power supply assembly for energizing the upper welding piece and the lower welding piece; during welding, the capacitor assembly is at a welding station and between the upper welding piece and the lower welding piece, the lifting and driving assembly drives the upper welding piece and the lower welding piece to move closer to each other, the power supply assembly energizes the upper welding piece and the lower welding piece, and the upper welding piece and the lower welding piece cooperate to perform electric fusion welding on the capacitor assembly.

[0006] Furthermore, the lifting drive assembly includes: a first set of driving structures for driving the upper weldment to approach or move away from the welding station; and a second set of driving structures for driving the lower weldment to approach or move away from the welding station.

[0007] Furthermore, the first group of driving structures includes: a first mounting seat; a first swing arm, which is rotatably arranged on the first mounting seat through a rotating shaft, the first swing arm includes a first arm and a second arm which are arranged at an angle, the first arm is extended toward the welding station, and the upper weldment is arranged on the first arm; a first driving member, which is connected to the second arm and is used to drive the second arm to rotate around the rotating shaft.

[0008] Furthermore, the first group of driving structures also includes: a first elastic member, arranged between the first driving member and the second arm; a first movable wheel, rotatably arranged on the second arm; a first cam and a second driving member, the first cam being eccentrically arranged at the movable end of the second driving member, and the second driving member being used to drive the first cam to rotate; during welding, the first movable wheel abuts against the first cam, and the second driving member drives the first cam to rotate, and the first cam can push the first movable wheel, causing the second arm to swing back and forth, and causing the first arm to drive the upper weldment to swing back and forth, so as to facilitate the upper weldment to approach or move away from the welding station.

[0009] Furthermore, the second group of driving structures includes: a second mounting seat; a second swing arm, rotatably arranged on the second mounting seat through a rotating shaft; a slide, the surface of the slide used to contact the second swing arm is an inclined surface; a third driving member, used to drive the slide to reciprocate and translate, so that the second swing arm moves along the inclined surface; when the second swing arm rises under the support of the inclined surface, the second swing arm can drive the lower weldment to approach the welding station; when the second swing arm descends under the support of the inclined surface, the second swing arm can drive the lower weldment away from the welding station.

[0010] Furthermore, the second group of driving structures also includes: a guide member, which is extended in the vertical direction, and the lower weldment is slidably set on the guide member, and the guide member is used to limit the movement direction of the lower weldment; and / or, a second elastic member, one end of the second swing arm is used to drive the lower weldment to move, and the other end is connected to the second elastic member.

[0011] Furthermore, the second group of driving structures also includes: a second movable wheel, rotatably arranged on the second swing arm; a second cam and a fourth driving member, the second cam being eccentrically arranged at the movable end of the fourth driving member, and the fourth driving member being used to drive the second cam to rotate; during welding, the second movable wheel abuts against the second cam, and the fourth driving member drives the second cam to rotate, and the second cam can push the second movable wheel to make the second swing arm swing back and forth, so as to facilitate the lower weldment to approach or move away from the welding station.

[0012] Furthermore, the stacked capacitor welding mechanism also includes a pressure sensor, which is used to detect the pressure of the upper weldment and / or the lower weldment during the welding process, so as to confirm whether the upper weldment and the lower weldment are working normally.

[0013] Furthermore, the upper welding piece and / or the lower welding piece is used to contact the capacitor assembly at a position that is arranged in a wheel shape.

[0014] Furthermore, the stacked capacitor welding mechanism also includes a rotation drive assembly, which is used to drive the upper weldment and / or the lower weldment to rotate; during the welding process, the wheel surface of the upper weldment or the lower weldment used to contact the capacitor assembly rotates, so that the position of the upper weldment or the lower weldment used to contact the capacitor assembly changes.

[0015] The present application provides a stacked capacitor welding mechanism, comprising an upper welding piece, a lower welding piece, a lifting drive assembly and a power supply assembly, wherein the lifting drive assembly is used to drive the upper welding piece and the lower welding piece to approach or move away from each other, so that the upper welding piece and the lower welding piece can act on the capacitor assembly. During welding, the power supply assembly energizes the upper welding piece and the lower welding piece, thereby realizing electric fusion welding of the capacitor assembly. The present application converts electrical energy into thermal energy through electric fusion welding, and can instantly heat the material to the melting point, with high welding efficiency. At the same time, the double sides of the capacitor assembly are synchronously welded through the double-point operation of the upper welding piece and the lower welding piece, and both the front and back sides of the capacitor assembly are subjected to the hot fusion effect, so the welding effect is good. Even if the foil is increased layer by layer, because the upper and lower parts of the welding part can be affected by stable high temperature, reliable welding can always be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 A schematic diagram of the structure of a lower weldment and a second set of driving structures provided in this application;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure of the slide table and the third driving member of the second driving structure. DETAILED DESCRIPTION

[0019] 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.

[0020] The present application provides a stacked capacitor welding mechanism, including: an upper welding piece 11, used for welding the front side of a capacitor assembly; a lower welding piece 12, used for welding the back side of the capacitor assembly; a lifting and driving assembly, used for driving the upper welding piece 11 and the lower welding piece 12 to move closer to or away from each other; a power supply assembly, used for energizing the upper welding piece 11 and the lower welding piece 12; during welding, the capacitor assembly is at a welding station and between the upper welding piece 11 and the lower welding piece 12, the lifting and driving assembly drives the upper welding piece 11 and the lower welding piece 12 to move closer to each other, the power supply assembly energizes the upper welding piece 11 and the lower welding piece 12, and the upper welding piece 11 and the lower welding piece 12 cooperate to perform electric fusion welding on the capacitor assembly.

[0021] It should be noted that the capacitor assembly described in the present application includes a lead frame and a foil, and the welding mechanism provided in the present application is used to weld the lead frame and the foil.

[0022] The upper weldment 11 and the lower weldment 12 are made of metal materials. In some embodiments, the upper weldment 11 and the lower weldment 12 are made of the same metal material as the lead frame; in some other embodiments, the upper weldment 11 and the lower weldment 12 are made of the same metal material as the foil.

[0023] After the power supply assembly energizes the upper welding piece 11 and the lower welding piece 12, the upper welding piece 11 and the lower welding piece 12 form positive and negative electrodes. During welding, the upper welding piece 11 and the lower welding piece 12 are brought close to each other, and the two are close to the capacitor assembly until a small air gap is maintained between the electrode and the welding part; after power is turned on, an arc is generated when the current passes through the air gap, and the high temperature of the arc can heat the metal, and finally the lead frame and the foil are welded by hot melting.

[0024] The present application converts electrical energy into thermal energy through electric fusion welding, which can instantly heat the material to the melting point and has high welding efficiency. At the same time, the double sides of the capacitor component are synchronously welded through the double-point operation of the upper welding piece 11 and the lower welding piece 12. Both the front and back sides of the capacitor component are subjected to the hot melting effect, and the welding effect is good. Even if the foil is increased layer by layer, because the upper and lower parts of the welding part can be affected by stable high temperature, reliable welding can always be guaranteed.

[0025] In one embodiment, the lifting drive assembly includes only one set of drive structures, one of the upper weldment 11 and the lower weldment 12 is fixedly arranged, and the other is connected to the set of drive structures and can move closer to or away from the fixed arrangement under the drive of the set of drive structures. The drive structure can be any drive member that can drive the weldment to move, such as a cylinder or an electric cylinder.

[0026] When the upper welding piece 11 and the lower welding piece 12 are away from each other, the capacitor assembly can enter the welding station; after the capacitor assembly is in place, the upper welding piece 11 and the lower welding piece 12 are close to each other until the capacitor assembly is within the hot melting range of the two, so that the capacitor assembly can accept electric fusion welding.

[0027] In another embodiment, the lifting drive assembly can use a motor to drive a double screw rod or a bidirectional cylinder to achieve the relative movement of the upper weldment 11 and the lower weldment 12 through a single drive.

[0028] In another embodiment, the lifting drive assembly includes: a first set of driving structures 21 for driving the upper weldment 11 to move closer to or away from the welding station; and a second set of driving structures 22 for driving the lower weldment 12 to move closer to or away from the welding station.

[0029] The first group of driving structures 21 and the second group of driving structures 22 may both be any driving member such as a cylinder, an electric cylinder, etc. that can drive the weldment (the upper weldment 11 or the lower weldment 12) to move.

[0030] By providing two sets of driving structures, the upper weldment 11 and the lower weldment 12 can independently move toward or away from each other.

[0031] The present application does not limit the specific configuration of the lifting drive assembly.

[0032] In a specific embodiment, the first group of driving structures 21 includes: a first mounting base 21a; a first swing arm 21b, which is rotatably disposed on the first mounting base 21a through a rotating shaft, the first swing arm 21b includes a first arm and a second arm that are arranged at an angle, the first arm extends toward the welding station, and the upper weldment 11 is arranged on the first arm; a first driving member 21c, which is connected to the second arm and is used to drive the second arm to rotate around the rotating shaft.

[0033] For details, please refer to Figure 1 In the illustrated embodiment, the upper weldment 11 and the lower weldment 12 are arranged opposite to each other in the vertical direction, and the welding station is located between the two. The first driving member 21c can be any linear driving member such as a cylinder or an electric cylinder; the fixed end of the first driving member 21c is arranged on the first mounting seat 21a, and the movable end is connected to the first swing arm 21b; the first swing arm 21b is roughly in the shape of a boomerang, the upper weldment 11 is arranged at the end of the first arm away from the second arm, and the first driving member 21c is connected to the end of the second arm away from the first arm; the rotating shaft is rotatably arranged on the first mounting seat 21a through a bearing, and the first swing arm 21b is sleeved on the rotating shaft. During welding, the movable end of the first driving member 21c is recovered, so that the second arm rotates counterclockwise around the rotating shaft, and the first arm rotates counterclockwise around the rotating shaft accordingly, and the upper weldment 11 swings downward along the circumference and approaches the welding station.

[0034] The first swing arm 21b is used to make the upper weldment 11 move up and down in a swinging manner, so as to be close to the welding station during welding and away from the welding station after welding is completed. This can not only reduce the equipment space required for linear motion and optimize the spatial layout, but also speed up the movement efficiency so as to facilitate multi-point rapid welding in coordination with the displacement of the capacitor component.

[0035] Optionally, the first group of driving structures 21 also includes: a first elastic member 21d, arranged between the first driving member 21c and the second arm; a first movable wheel 21e, rotatably arranged on the second arm; a first cam 21f and a second driving member, the first cam 21f is eccentrically arranged at the movable end of the second driving member, and the second driving member is used to drive the first cam 21f to rotate; during welding, the first movable wheel 21e abuts against the first cam 21f, and the second driving member drives the first cam 21f to rotate, and the first cam 21f can push the first movable wheel 21e, so that the second arm swings back and forth, and the first arm drives the upper weldment 11 to swing back and forth, so as to facilitate the upper weldment 11 to approach or move away from the welding station.

[0036] The first elastic member 21d may be made of an elastic structure such as a spring or a spring sheet, or may be made of an elastic material such as rubber or plastic. The first elastic member 21d has elastic properties, can adapt to external forces to deform, and has a tendency to return to its original state.

[0037] The second driving member can be a rotating driving member such as a motor, a rotary cylinder, etc. Since the first cam 21f is eccentrically arranged on the second driving member, when the second driving member drives the first cam 21f to rotate, the distance between the wheel surface of the first cam 21f for contacting the first movable wheel 21e and its rotation center will change.

[0038] For details, please refer to Figure 1 In the illustrated embodiment, the second arm is provided with a first cam 21f on the left side of the lower end away from the first arm, and the right side is connected to the first driving member 21c through the first elastic member 21d. During welding, the first movable wheel 21e abuts against the first cam 21f, and the second driving member drives the first cam 21f to rotate; when the wheel surface of the first cam 21f with a larger distance from the rotation center contacts the first movable wheel 21e, the first cam 21f can push the first movable wheel 21e to the right, at this time, the second arm rotates counterclockwise, and the first arm drives the upper weldment 11 to swing toward the welding station, and the first elastic member 21d is compressed, and its elastic force can act on the first movable wheel 21e in the opposite direction to ensure that the first movable wheel 21e always abuts against the first cam 21f; when the wheel surface of the first cam 21f with a smaller distance from the rotation center contacts the first movable wheel 21e, the first elastic member 21d recovers and pushes the first movable wheel 21e to follow the first cam 21f to the left, and the second arm rotates clockwise, and the first arm drives the upper weldment 11 to swing away from the welding station.

[0039] It should be explained that the lead frame has a certain length. At this time, there are multiple welding parts on the lead frame, and each welding part needs to be welded with multiple layers of foil. When a welding part is subjected to welding operation at a welding station, the upper welding part 11 and the lower welding part 12 need to quickly approach each other to achieve the welding of a layer of foil, and then quickly move away to facilitate the new layer of foil to be in place; therefore, during the welding process of a welding part, the upper welding part 11 and the lower welding part 12 need to quickly approach and move away from each other multiple times, so as to achieve the welding of multiple layers of foil at the part; after completing the welding operation of a welding part, the upper welding part 11 and the lower welding part 12 need to move away from each other to facilitate the movement of the lead frame and allow a new welding part to enter the welding station.

[0040] It is easy to understand that the loading speed of the foil is usually inconsistent with the moving speed of the lead frame. For example, eight layers of foil need to be welded on a welding position, and each layer of foil needs to be welded for 1 second. During welding, the lead frame and the foil are in place, the upper weldment 11 and the lower weldment 12 are close to each other for 1 second, and the welding is completed. The upper weldment 11 and the lower weldment 12 are separated for 1 second, and a new foil is in place. The upper weldment 11 and the lower weldment 12 are close to each other for 1 second, and the welding is completed... and so on. The upper weldment 11 and the lower weldment 12 need to move back and forth quickly relative to each other. After a welding position is completed, the upper weldment 11 and the lower weldment 12 need to be separated from each other for 5 seconds, so that the new welding position on the lead frame enters the welding station and a new foil falls on the welding position. If only the first drive member 21c is set to achieve two operation needs, not only the precision requirements of the first drive member 21c are high, but also the difficulty of electrical control is increased.

[0041] The welding mechanism provided in the present application adds a first cam 21f. When processing a lead frame with multiple welding positions, the eccentric rotation of the first cam 21f and the elastic deformation of the first elastic member 21d can realize rapid and multiple reciprocating movements of the upper weldment 11 toward the welding station while the second drive member continues to work without stopping. At the same time, the avoidance and resetting of the upper weldment 11 can be realized by the extension and retraction of the first drive member 21c to meet the need to change the welding position of the lead frame.

[0042] In a specific embodiment, the second group of driving structures 22 includes: a second mounting seat 22a; a second swing arm 22b, which is rotatably arranged on the second mounting seat 22a through a rotating shaft; a slide 22c, and the surface of the slide 22c used to contact the second swing arm 22b is an inclined surface; a third driving member 22d, which is used to drive the slide 22c to reciprocate, so that the second swing arm 22b moves along the inclined surface; when the second swing arm 22b rises under the support of the inclined surface, the second swing arm 22b can drive the lower weldment 12 to approach the welding station; when the second swing arm 22b descends under the support of the inclined surface, the second swing arm 22b can drive the lower weldment 12 away from the welding station.

[0043] For details, please refer to Figure 3In the illustrated embodiment, the upper surface of the slide 22c is an inclined surface, which inclines from left to upper right; a pulley is provided on the second swing arm 22b, and the pulley is slidably arranged on the inclined surface; the third driving member 22d can be any linear driving member such as a cylinder or an electric cylinder; the movable end of the third driving member 22d is connected to the slide 22c and is used to drive the slide 22c to move in the left and right directions. During welding, the third driving member 22d drives the slide 22c to move from right to left. At this time, the pulley moves from left to right relative to the slide 22c, and the pulley is lifted by the slide 22c. The pulley can drive the second swing arm 22b and the lower weldment 12 to rise, so that the lower weldment 12 is close to the welding station; after welding is completed, the third driving member 22d drives the slide 22c to move from left to right. At this time, the pulley moves from right to left relative to the slide 22c, and the pulley is lowered by the slide 22c. The pulley can drive the second swing arm 22b and the lower weldment 12 to fall, so that the lower weldment 12 is away from the welding station. At this time, the second mounting seat 22a and the rotating shaft can limit the movement direction of the second swing arm 22b, so that the second swing arm 22b can only make a circular motion, and then the lower weldment 12 can only move up and down.

[0044] The inclined plane converts the translational motion of the slide 22c into the up and down swinging motion of the second swing arm 22b, thereby realizing the relative motion between the lower weldment 12 and the welding station. The swinging motion can reduce the space requirement of the equipment in the vertical direction, so as to optimize the spatial layout, and can also speed up the motion efficiency and improve the welding efficiency.

[0045] Optionally, the lower weldment 12 is disposed on the second swing arm 22b, and when the second swing arm 22b swings up and down, it drives the lower weldment 12 to move closer to or away from the welding station in a swinging manner.

[0046] Optionally, the second group of driving structures 22 further includes a guide member 22e, which is extended in the vertical direction, and the lower weldment 12 is slidably disposed on the guide member 22e, and the guide member 22e is used to limit the movement direction of the lower weldment 12.

[0047] The guide member 22e may be a guide rail, a guide rod or other guide components.

[0048] For details, please refer to Figure 2 In the illustrated embodiment, the guide member 22e adopts a guide rail, which extends vertically, and the lower weldment 12 is slidably set on the guide member 22e through a slider; the guide member 22e can limit the movement direction of the lower weldment 12, which is beneficial to the stability and accuracy of the movement of the lower weldment 12.

[0049] Continue to refer to Figure 2 The left end of the second swing arm 22b is used to contact the lower weldment 12. When the second swing arm 22b rotates clockwise, it can lift the lower weldment 12. When the second swing arm 22b rotates counterclockwise, the lower weldment 12 moves away from the welding station along with the second swing arm 22b under the influence of its own weight.

[0050] Optionally, the second group of driving structures 22 further includes a second elastic member 22f, one end of the second swing arm 22b is used to drive the lower weldment 12 to move, and the other end is connected to the second elastic member 22f.

[0051] The second elastic member 22f may be made of an elastic structure such as a spring or a spring sheet, or may be made of an elastic material such as rubber or plastic. The second elastic member 22f has elastic properties, can be deformed by external forces, and has a tendency to return to its original state.

[0052] For details, please refer to Figure 2 In the illustrated embodiment, the middle part of the second swing arm 22b is rotatably arranged on the second mounting seat 22a through a rotating shaft, a pulley is arranged at the left end of the second swing arm 22b, and the pulley is slidably arranged on the inclined surface of the slide 22c, and the inclined surface is inclined from front to rear and upward along the direction perpendicular to the paper surface, and the right end of the second swing arm 22b is connected to the elastic member, and the elastic member is fixedly arranged on the table; so that the slide 22c moves along the front and rear directions, and the inclined surface can push the pulley, so that the second swing arm 22b rotates clockwise or counterclockwise. Specifically, when the slide 22c moves from back to front, the left end of the second swing arm 22b swings up and can lift the lower weldment 12 upward, so that the lower weldment 12 is close to the welding station. At this time, the second elastic member 22f is compressed; when the slide 22c moves from front to back, the pulley loses its high-position support, and the second elastic member 22f recovers and pushes the right end of the second swing arm 22b to rotate counterclockwise in the opposite direction, so that the left end of the second swing arm 22b swings down and the lower weldment 12 is away from the welding station; the second elastic member 22f can cause the pulley to press against the inclined surface, thereby ensuring that the second swing arm 22b is supported by the inclined surface.

[0053] Optionally, the second group of driving structures 22 also includes: a second movable wheel 22g, rotatably disposed on the second swing arm 22b; a second cam 22h and a fourth driving member, the second cam 22h being eccentrically disposed at the movable end of the fourth driving member, and the fourth driving member being used to drive the second cam 22h to rotate; during welding, the second movable wheel 22g abuts against the second cam 22h, and the fourth driving member drives the second cam 22h to rotate, and the second cam 22h can push the second movable wheel 22g, causing the second swing arm 22b to swing back and forth, so as to facilitate the lower weldment 12 to approach or move away from the welding station.

[0054] For details, please refer to Figure 2In the illustrated embodiment, the middle part of the second swing arm 22b is rotatably arranged on the second mounting seat 22a through a rotating shaft, a pulley is arranged at the left end of the second swing arm 22b, and the pulley is slidably arranged on the inclined surface of the slide table 22c, and the inclined surface is inclined from front to rear and upward along the direction perpendicular to the paper surface, and the right end of the second swing arm 22b is connected to the second elastic member 22f, and the second elastic member 22f is fixedly arranged on the table; on the right side of the rotating shaft, a fourth driving member is arranged on the table, and a second cam 22h is arranged at the movable end of the fourth driving member, and a second movable wheel 22g is arranged on the second swing arm 22b. When the left end of the second swing arm 22b swings up and the lower weldment 12 approaches the welding station, the right end of the second swing arm 22b drops and the second movable wheel 22g abuts against the second cam 22h.

[0055] Since the second cam 22h is eccentrically arranged at the movable end of the fourth driving member, when the fourth driving member drives the second cam 22h to rotate, the distance between the wheel surface of the second cam 22h for contacting the second movable wheel 22g and its rotation center will change. When the wheel surface of the second cam 22h with a larger distance from the rotation center contacts the second movable wheel 22g, the second cam 22h can push up the second movable wheel 22g, so that the right end of the second swing arm 22b swings up and the left end swings down, thereby moving the lower weldment 12 away from the welding station; when the wheel surface of the second cam 22h with a smaller distance from the rotation center contacts the second movable wheel 22g, the right end of the second swing arm 22b swings down and the left end swings up, thereby moving the lower weldment 12 closer to the welding station.

[0056] The purpose of setting the second cam 22h is similar to the purpose of setting the first cam 21f mentioned above, and the details are not repeated here.

[0057] During welding, the first cam 21f and the second cam 22h rotate, so that the upper welding piece 11 and the lower welding piece 12 move synchronously and quickly relative to each other, so as to facilitate the foil feeding to achieve welding; after completing the welding of multiple layers of foil at a welding position, the first driving member 21c and the third driving member 22d extend and retract, so that the upper welding piece 11 and the lower welding piece 12 are out of position, so as to facilitate the movement of the lead frame and change the welding position.

[0058] Optionally, the pulley is elastically arranged on the second swing arm 22b, or the surface of the pulley for contacting the inclined surface is made of elastic material.

[0059] The second cam 22h rotates eccentrically, so that when the second swing arm 22b swings back and forth, the pulley can maintain contact with the inclined surface through the adaptive deformation of the elastic structure.

[0060] For example, Figure 2 In the illustrated embodiment, when the right end of the second swing arm 22b swings up and the left end swings down, the elastic structure of the pulley is compressed; when the right end of the second swing arm 22b swings down and the left end swings up, the elastic structure of the pulley is restored; in this way, the pulley can always maintain a state of resting against the inclined plane.

[0061] Optionally, the stacked capacitor welding mechanism provided in the present application also includes a pressure sensor 1, which is used to detect the pressure of the upper weldment 11 and / or the lower weldment 12 during the welding process to facilitate confirmation of whether the upper weldment 11 and the lower weldment 12 are working normally.

[0062] By setting the pressure sensor 1 to understand the working pressure of the weldment, it is possible to confirm whether the upper weldment 11 and the lower weldment 12 act normally on the capacitor assembly, whether the electric fusion welding is normally achieved through hot melting, and then confirm whether the welding is carried out normally.

[0063] Figure 1 In the illustrated embodiment, a pressure sensor 1 is provided on the first arm of the first swing arm 21 b , and a detection end of the pressure sensor 1 acts on the upper weldment 11 to confirm the welding pressure of the upper weldment 11 .

[0064] In other embodiments, a pressure sensor 1 may also be provided for the lower weldment 12 .

[0065] The present application does not limit the number and specific installation positions of the pressure sensors 1 .

[0066] Optionally, the upper welding piece 11 and / or the lower welding piece 12 is configured in a wheel shape at a portion for contacting the capacitor assembly.

[0067] Since the wheel surface is in an arc shape, when the wheel surface contacts the capacitor assembly, the contact area between the weldment and the capacitor assembly can be reduced, so that the weldment can accurately act on a welding position with a smaller area, ensuring the accuracy and reliability of welding.

[0068] Optionally, the stacked capacitor welding mechanism provided by the present application also includes a rotation drive component, which is used to drive the upper weldment 11 and / or the lower weldment 12 to rotate; during the welding process, the wheel surface of the upper weldment 11 or the lower weldment 12 used to contact the capacitor component rotates, so that the position of the upper weldment 11 or the lower weldment 12 used to contact the capacitor component changes.

[0069] The rotary drive assembly may be a rotary drive member such as a motor or a rotary cylinder.

[0070] By setting up a rotating drive component, the upper weldment 11 and / or the lower weldment 12 can rotate during the welding process. On the one hand, it can prevent the parts of the weldment that contact the capacitor component from being deformed due to long-term use, which is beneficial to the service life of the overall structure of the weldment. On the other hand, the weldment is energized and generates heat, and the rotating state is beneficial to the uniformity and balance of the welding temperature.

[0071] 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 mechanism, characterized in that: include: An upper welding piece (11) is used for welding the front side of the capacitor assembly; A lower welding piece (12) for welding the back side of the capacitor assembly; A lifting drive assembly, used for driving the upper weldment (11) and the lower weldment (12) to move closer to or farther from each other; A power supply assembly, used to supply electricity to the upper welding piece (11) and the lower welding piece (12); During welding, the capacitor assembly is located at a welding station and between the upper welding piece (11) and the lower welding piece (12); the lifting drive assembly drives the upper welding piece (11) and the lower welding piece (12) to approach each other; the power supply assembly energizes the upper welding piece (11) and the lower welding piece (12); the upper welding piece (11) and the lower welding piece (12) cooperate to perform electric fusion welding on the capacitor assembly.

2. The stacked capacitor welding mechanism according to claim 1, characterized in that: The lifting drive assembly comprises: A first set of driving structures (21) for driving the upper weldment (11) to move closer to or farther from the welding station; The second set of driving structures (22) is used to drive the lower weldment (12) to move closer to or farther away from the welding station.

3. The stacked capacitor welding mechanism according to claim 2, characterized in that: The first group of driving structures (21) comprises: A first mounting seat (21a); a first swing arm (21b) rotatably arranged on the first mounting seat (21a) via a rotating shaft, the first swing arm (21b) comprising a first arm and a second arm arranged at an angle, the first arm extending toward the welding station, and the upper weldment (11) being arranged on the first arm; A first driving member (21c) is connected to the second arm and is used to drive the second arm to rotate around the rotation axis.

4. The stacked capacitor welding mechanism according to claim 3, characterized in that: The first group of driving structures (21) further comprises: A first elastic member (21d) is disposed between the first driving member (21c) and the second arm; A first movable wheel (21e) rotatably arranged on the second arm; a first cam (21f) and a second driving member, wherein the first cam (21f) is eccentrically arranged at a movable end of the second driving member, and the second driving member is used to drive the first cam (21f) to rotate; During welding, the first movable wheel (21e) abuts against the first cam (21f), and the second driving member drives the first cam (21f) to rotate. The first cam (21f) can push the first movable wheel (21e), causing the second arm to swing back and forth, and causing the first arm to drive the upper weldment (11) to swing back and forth, so that the upper weldment (11) can approach or move away from the welding station.

5. The stacked capacitor welding mechanism according to claim 2, characterized in that: The second set of driving structures (22) comprises: A second mounting seat (22a); A second swing arm (22b) is rotatably arranged on the second mounting seat (22a) via a rotating shaft; a slide table (22c), wherein a surface of the slide table (22c) for contacting the second swing arm (22b) is an inclined surface; a third driving member (22d), used for driving the slide table (22c) to move back and forth, thereby causing the second swing arm (22b) to move along the inclined plane; When the second swing arm (22b) rises under the support of the inclined surface, the second swing arm (22b) can drive the lower weldment (12) to approach the welding station; When the second swing arm (22b) descends under the support of the inclined surface, the second swing arm (22b) can drive the lower weldment (12) away from the welding station.

6. The stacked capacitor welding mechanism according to claim 5, characterized in that: The second set of driving structures (22) further comprises: A guide member (22e) is extended in a vertical direction, the lower welding member (12) is slidably arranged on the guide member (22e), and the guide member (22e) is used to limit the movement direction of the lower welding member (12); And / or, a second elastic member (22f), one end of the second swing arm (22b) is used to drive the lower welding member (12) to move, and the other end is connected to the second elastic member (22f).

7. The stacked capacitor welding mechanism according to claim 5, characterized in that: The second set of driving structures (22) further comprises: A second movable wheel (22g) is rotatably arranged on the second swing arm (22b); a second cam (22h) and a fourth driving member, wherein the second cam (22h) is eccentrically arranged at a movable end of the fourth driving member, and the fourth driving member is used to drive the second cam (22h) to rotate; During welding, the second movable wheel (22g) abuts against the second cam (22h), and the fourth driving member drives the second cam (22h) to rotate. The second cam (22h) can push the second movable wheel (22g) to make the second swing arm (22b) swing back and forth, so as to facilitate the lower weldment (12) to approach or move away from the welding station.

8. The stacked capacitor welding mechanism according to claim 1, characterized in that: It also includes a pressure sensor (1), which is used to detect the pressure of the upper weldment (11) and / or the lower weldment (12) during the welding process, so as to confirm whether the upper weldment (11) and the lower weldment (12) are working normally.

9. The stacked capacitor welding mechanism according to any one of claims 1 to 8, characterized in that: The portion of the upper welding piece (11) and / or the lower welding piece (12) used for contacting the capacitor assembly is arranged in a wheel shape.

10. The stacked capacitor welding mechanism according to claim 9, characterized in that: It also includes a rotation drive assembly, wherein the rotation drive assembly is used to drive the upper weldment (11) and / or the lower weldment (12) to rotate; During the welding process, the wheel surface of the upper welding piece (11) or the lower welding piece (12) for contacting the capacitor assembly rotates, so that the position of the upper welding piece (11) or the lower welding piece (12) for contacting the capacitor assembly changes.

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