A varistor continuous welding device based on a rotary displacement structure

Abstract

The present invention relates to the field of varistor welding equipment. Specifically, through the mutual cooperation of the triangular block, the pushing block, the driving component and the lifting component, during the process of fixing and docking the varistor, the varistor is extruded, so that the triangular block expands and bends the pins of the varistor, aligning the pins of the varistor with the jacks on the circuit board, facilitating the rapid docking of the varistor with the circuit board and improving the efficiency of varistor welding. Through the mutual cooperation of the triangular block, the pushing block, the driving component and the lifting component, during the process of fixing and docking the varistor, the varistor is extruded, so that the triangular block expands and bends the pins of the varistor, aligning the pins of the varistor with the jacks on the circuit board, facilitating the rapid docking of the varistor with the circuit board and improving the efficiency of varistor welding.

Description

Technical Field

[0001] The present invention relates to the technical field of varistor welding equipment, and specifically to a continuous varistor welding equipment based on a rotary displacement structure. Background Art

[0002] A varistor is a resistor device with non-linear volt-ampere characteristics, mainly used for voltage clamping when the circuit is subjected to overvoltage, absorbing excess current to protect sensitive devices. It is often used in power systems, surge suppressors, security systems, motor protection, automotive electronic systems, and household appliances.

[0003] Varistors are generally welded onto circuit boards for use. When welding a varistor, the pins of the varistor need to be inserted into the corresponding sockets on the circuit board, then the solder wire is brought close to the pins of the varistor, and then an electric soldering iron is used to weld the pins of the varistor and the circuit board. During welding, it is necessary to hold the varistor by hand to prevent it from tilting. The existing welding process also has the following deficiencies: 1. Since the varistor has a small volume, the original distance between the two pins on the varistor is relatively close, while the distance between the reserved sockets on the circuit board is generally greater than the original distance between the two pins. Therefore, when installing the varistor, it is necessary to first bend the pins of the varistor so that the distance between the pins of the varistor matches the distance between the sockets on the circuit board. The bending process takes a certain amount of time, affecting the welding efficiency of the varistor; 2. When manually inserting the pins of the varistor into the circuit board, it is easy to cause inaccurate docking between the pins and the sockets, resulting in pin bending, and it is easy to have a certain degree of deviation when holding the varistor by hand during the welding process, affecting the welding firmness between the varistor and the circuit board. Summary of the Invention

[0004] To solve the above problems, the present invention provides a continuous varistor welding equipment based on a rotary displacement structure, including a bottom table, a rotating table rotatably installed on the top of the bottom table, and a welding mechanism fixedly installed on the bottom table. A plurality of fixed docking mechanisms are circumferentially and evenly installed on the top of the rotating table, and an arc-shaped guide member is fixedly connected to the top of the bottom table through a bracket.

[0005] The fixed docking mechanism includes a mounting base fixedly installed on the top of the rotating table. A clamping assembly for clamping and limiting the circuit board is installed on the mounting base. A support frame is vertically movably installed on the mounting base. A docking block for accommodating the varistor is slidably installed on the support frame in the front-back direction. A placement groove is formed on the side of the docking block away from the center of the rotating table. A triangular block for expanding, supporting and bending the pins of the varistor is fixedly installed at the bottom of the placement groove. A pushing block for extruding the varistor is vertically slidably installed inside the placement groove. A driving assembly for driving the clamping assembly to perform centering and clamping and driving the support frame to move up and down is installed inside the mounting base. A lifting assembly for driving the pushing block to move up and down is installed on the side of the support frame close to the center of the rotating table. A second reset spring for driving the docking block to move away from the center of the rotating table is installed on the support frame.

[0006] In a possible implementation manner, the clamping assembly includes movable plates circumferentially and evenly installed on the mounting base. A clamping plate for clamping the circuit board is slidably installed on the side of the movable plate close to the center of the mounting base. A buffer spring for buffering is fixedly connected between the movable plate and the clamping plate.

[0007] In a possible implementation manner, a stop bar for blocking and limiting the varistor is fixedly connected to the side of the docking block away from the center of the rotating table. The stop bars are symmetrically distributed about the placement groove in the left-right direction and are located on the side of the pushing block away from the center of the rotating table.

[0008] In a possible implementation manner, a guiding post is fixedly installed on the top of the docking block. A first reset spring is fixedly connected between the bottom of the pushing block and the inner wall of the docking block. Support frames are fixedly connected to both the left and right sides of the docking block. The vertical sections of the support frames are slidably installed on the top of the support frame along the radial direction parallel to the rotating table. The second reset spring is fixedly connected between the rear side of the vertical section of the support frame and the inner wall of the support frame.

[0009] In a possible implementation manner, the driving assembly includes a threaded rod rotatably installed inside the mounting base. A lifting plate is threadedly connected to the outside of the threaded rod. The lifting plate is vertically slidably installed inside the mounting base. A plurality of sliders corresponding to the movable plates one by one are slidably installed on the top of the mounting base along the direction perpendicular to its center line. The movable plate is fixedly installed on the top of the movable plate. Connecting rods are hinged between the top of the lifting plate and the bottoms of the plurality of sliders.

[0010] In a possible implementation manner, the front side of the top of the rotating table is the loading station. The loading station rotates 120° clockwise to be the welding station. The welding station rotates 120° clockwise to be the unloading station. The welding mechanism is located at the welding station.

[0011] In a possible implementation manner, the driving component further includes L-shaped supports fixedly connected to the left and right sides of the lifting plate in a symmetric distribution. The L-shaped supports are slidably connected to the mounting base up and down. The top of the vertical section of the L-shaped support is fixedly connected to the corresponding support frame. The bottom of the threaded rod rotates through to the lower side of the rotating table and is fixedly connected with a transmission gear. An internal gear ring and an external gear ring, which are respectively located inside and outside the transmission gear and partially have teeth, are fixedly installed on the top of the bottom platform. The teeth of the external gear ring are located between the feeding station and the welding station, and the teeth of the internal gear ring are located between the welding station and the discharging station.

[0012] In a possible implementation manner, the lifting component includes a lever rotatably installed on one side of the support frame close to the center of the rotating table. A fixed block is rotatably connected to the side of the pushing block close to the center of the rotating table. An activity groove is formed at one end of the lever close to the corresponding fixed block. The fixed block is slidably installed in the activity groove. A limiting frame corresponding to the L-shaped support is fixedly connected to the outer side wall of the mounting base. The vertical section of the L-shaped support is slidably installed up and down in the corresponding limiting frame. A T-shaped support rod is fixedly connected to the limiting frame close to the lever side. The end of the lever away from the fixed block extends to the top of the horizontal section of the T-shaped support rod.

[0013] In a possible implementation manner, the arc-shaped guide member has an arc-shaped structure and its left end is provided with a wedge-shaped structure. The arc-shaped guide member is located between the welding station and the discharging station. The arc-shaped guide member cooperates with the guide post and its height gradually increases in the clockwise direction.

[0014] In a possible implementation manner, a stepping motor for driving the rotating table to rotate at a fixed angle is installed on the bottom platform. The output shaft of the stepping motor is fixedly connected to the center of the bottom of the rotating table. A plain bearing coaxial with the stepping motor is also installed between the top of the bottom platform and the bottom of the rotating table.

[0015] The beneficial effects of the present invention are as follows: 1. Through the mutual cooperation of the triangular block, the pushing block, the driving component and the lifting component of the present invention, during the process of fixing and docking the varistor, the varistor is extruded, so that the triangular block expands and bends the pins of the varistor, aligning the pins of the varistor with the jacks on the circuit board, facilitating the quick docking of the varistor and the circuit board, and improving the welding efficiency of the varistor.

[0016] 2. Through the mutual cooperation of the clamping component, the docking block, the driving component and the lifting component of the present invention, the varistor and the circuit board can be respectively fixed during welding, and then the varistor and the circuit board are inserted together for welding. The docking block fixes and supports the varistor during the welding process, improving the accuracy of the insertion of the varistor and the circuit board, avoiding the situation that the varistor moves during the welding process, and improving the welding firmness of the varistor. Brief Description of the Drawings

[0017] Figure 1 is a schematic three-dimensional structure diagram of the present invention.

[0018] Figure 2 is a right side sectional view of the present invention.

[0019] Figure 3 is a schematic three-dimensional structure diagram of the fixed docking mechanism of the present invention.

[0020] Figure 4 is a schematic three-dimensional structure diagram of the clamping assembly of the present invention.

[0021] Figure 5 is a schematic three-dimensional structure diagram of the docking block of the present invention.

[0022] Figure 6 is a schematic diagram of the state when the pushing block of the present invention squeezes the piezoresistor.

[0023] Figure 7 is a front sectional view of the drive assembly of the present invention.

[0024] Figure 8 is a schematic three-dimensional structure diagram of the lifting assembly of the present invention.

[0025] Figure 9 is a schematic three-dimensional structure diagram of the cooperation of the transmission gear, outer gear ring and inner gear ring of the present invention.

[0026] In the figure: 1, bottom table; 11, rotating table; 12, stepping motor; 2, fixed docking mechanism; 21, mounting seat; 22, clamping assembly; 221, movable plate; 222, clamping plate; 223, buffer spring; 2, docking block; 231, placing groove; 232, triangular block; 233, pushing block; 234, retaining strip; 235, guiding column; 236, first return spring; 237, support frame; 24, drive assembly; 241, threaded rod; 242, lifting plate; 243, slider; 244, connecting rod; 245, L-shaped support; 246, transmission gear; 247, inner gear ring; 248, outer gear ring; 25, lifting assembly; 251, lever; 252, fixed block; 253, limiting frame; 254, T-shaped support rod; 26, support frame; 27, second return spring; 3, welding mechanism; 4, arc guiding member. Detailed Description of the Invention

[0027] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0028] Please refer to Figure 1 、 Figure 2 and Figure 3 , a varistor continuous welding device based on a rotary displacement structure, including a base table (1), a rotary table (11) rotatably installed on the top of the base table (1), and a welding mechanism (3) fixedly installed on the base table (1). A plurality of fixed docking mechanisms (2) are circumferentially and evenly installed on the top of the rotary table (11), and an arc-shaped guide member (4) is fixedly connected to the top of the base table (1) through a bracket.

[0029] Please refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 , the fixed docking mechanism (2) includes a mounting seat (21) fixedly installed on the top of the rotary table (11). A clamping assembly (22) for clamping and limiting the circuit board is installed on the mounting seat (21). A support frame (26) is vertically movably installed on the mounting seat (21). A docking block (23) for holding the varistor is slidably installed on the support frame (26) in the front-back direction. A placement groove (231) is formed on the side of the docking block (23) away from the center of the rotary table (11). A triangular block (232) for expanding, supporting, and bending the pins of the varistor is fixedly installed at the bottom of the placement groove (231). A pushing block (233) for squeezing the varistor is vertically slidably installed inside the placement groove (231). A driving assembly (24) for driving the clamping assembly (22) to perform centering and clamping and driving the support frame (26) to move up and down is installed inside the mounting seat (21). A lifting assembly (25) for driving the pushing block (233) to move up and down is installed on the side of the support frame (26) close to the center of the rotary table (11). A return spring II (27) for driving the docking block (23) to move away from the center of the rotary table (11) is installed on the support frame (26).

[0030] Please refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 7 , the clamping assembly (22) includes movable plates (221) circumferentially and evenly installed on the mounting seat (21). The number of the movable plates (221) is four. A clamping plate (222) for clamping the circuit board is slidably installed on the side of the movable plate (221) close to the center of the mounting seat (21). A buffer spring (223) for buffering is fixedly connected between the movable plate (221) and the clamping plate (222).

[0031] When loading, place the circuit board at the center of the top of the mounting base 21. The edge of the circuit board is parallel to the corresponding clamping plate 222. Drive the plurality of movable plates 221 to move simultaneously towards the center of the mounting base 21 through the driving assembly 24. The movable plate 221 pushes the clamping plate 222 to move towards the center of the mounting base 21 through the buffer spring 223, so that the clamping plate 222 clamps the four sides of the circuit board. When the clamping plate 222 abuts against the edge of the circuit board, the movable plate 221 continues to move towards the center of the mounting base 21, gradually increasing the clamping force of the clamping plate 222. The buffer spring 223 can play a buffering role to prevent the clamping plate 222 from damaging the circuit board due to excessive clamping force.

[0032] Please refer to Figure 5 and Figure 6 , on the side of the docking block 23 away from the center of the rotating table 11, a blocking strip 234 for blocking and limiting the varistor is fixedly connected. The blocking strips 234 are symmetrically distributed about the placement groove 231 in the left and right directions and are located on the side of the pushing block 233 away from the center of the rotating table 11. Spaces are reserved at the top and bottom of the blocking strip 234 for the varistor to enter and leave the inside of the placement groove 231 respectively.

[0033] When the pushing block 233 pushes the varistor downward to expand and bend its pins, the blocking strip 234 can block on the side of the varistor away from the center of the rotating table 11, preventing the varistor from detaching from the inside of the placement groove 231 during the compression process and improving the stability of the varistor during the compression process.

[0034] Please refer to Figure 3 , Figure 5 and Figure 8 , a guiding column 235 is fixedly installed on the top of the docking block 23. A first reset spring 236 is fixedly connected between the bottom of the pushing block 233 and the inner wall of the docking block 23. Support frames 237 are fixedly connected to both the left and right sides of the docking block 23. The vertical sections of the support frames 237 are slidably installed on the top of the support frame 26 along the radial direction parallel to the rotating table 11. A second reset spring 27 is fixedly connected between the rear side of the vertical section of the support frame 237 and the inner wall of the support frame 26.

[0035] During the downward movement of the docking block 23, the lifting assembly 25 will push the pushing block 233 downward to squeeze the varistor. At this time, the first reset spring 236 will be compressed and contracted. When the docking block 23 moves upward, the pushing block 233 is pushed upward to reset by the resilience of the first reset spring 236.

[0036] Please refer to Figure 1 and Figure 2, the front side at the top of the rotary table 11 is the loading station. The loading station rotates 120° clockwise to be the welding station, and the welding station rotates 120° clockwise to be the unloading station. The welding mechanism 3 is located at the welding station. It should be noted that the welding mechanism 3 belongs to the prior art. The welding mechanism 3 includes an electric push rod and two soldering irons installed on the electric push rod. When the mounting seat 21 moves to the welding station, the two soldering irons are pushed by the electric telescopic rod to align with the two pins of the varistor for welding.

[0037] When the mounting seat 21 moves to the loading station, the circuit board is placed on the mounting seat 21 and the varistor is placed in the placement groove 231 manually or by an existing manipulator. Then the rotary table 11 drives the mounting seat 21 to transfer from the loading station to the welding station. At this time, the solder wire is conveyed to the part where the circuit board and the varistor pins are inserted by an existing wire feeding mechanism. At the same time, the welding mechanism 3 heats the solder wire to make it melt. Then the wire feeding mechanism and the welding mechanism 3 move away from the circuit board and the varistor, so that the melted solder wire solidifies again. The solidified solder wire is used to connect the pins of the varistor to the circuit board. After that, the rotary table 11 drives the mounting seat 21 to transfer from the welding station to the unloading station, and the welded circuit board is taken down manually or by an existing manipulator. Finally, the rotary table 11 drives the mounting seat 21 to move from the unloading station to the loading station. Through continuous rotation and displacement at the loading station, welding station and unloading station, continuous welding is realized, improving the processing efficiency.

[0038] Please refer to Figure 2 , Figure 3 and Figure 7 , the driving assembly 24 includes a threaded rod 241 rotatably installed inside the mounting seat 21. An elevating plate 242 is threadedly connected to the outside of the threaded rod 241. The elevating plate 242 slides up and down inside the mounting seat 21. A plurality of sliders 243 corresponding to the movable plates 221 one by one are slidably installed on the top of the mounting seat 21 along a direction perpendicular to its center line. The movable plates 221 are fixedly installed on the top of the movable plates 221. Connecting rods 244 are hinged between the top of the elevating plate 242 and the bottoms of the plurality of sliders 243.

[0039] Please refer to Figure 2 , Figure 3 and Figure 7, the driving component 24 further includes L-shaped supports 245 fixedly connected to the left and right symmetrically distributed on the lifting plate 242. The L-shaped supports 245 are slidably connected to the mounting base 21 up and down. The top of the vertical section of the L-shaped support 245 is fixedly connected to the corresponding support frame 26. The bottom of the threaded rod 241 rotates through to the lower side of the rotating table 11 and is fixedly connected with a transmission gear 246. An internal gear ring 247 and an external gear ring 248 are fixedly installed on the top of the bottom base 1, which are respectively located inside and outside the transmission gear 246 and partially have teeth. The teeth of the external gear ring 248 are located between the loading station and the welding station, and the teeth of the internal gear ring 247 are located between the welding station and the unloading station.

[0040] Please refer to Figure 1 and Figure 9 , the arc-shaped guide 4 is of an arc-shaped structure and its left end is provided with a wedge-shaped structure. The arc-shaped guide 4 is located between the welding station and the unloading station. The arc-shaped guide 4 cooperates with the guide post 235 and its height gradually increases in the clockwise direction. The left end of the arc-shaped guide 4 is located on the left side of the teeth of the internal gear ring 247.

[0041] When the rotating table 11 drives the mounting base 21 to rotate clockwise, the mounting base 21 will drive the transmission gear 246 to rotate around the center of the rotating table 11. During the process of the mounting base 21 moving from the loading station to the welding station, the transmission gear 246 will mesh with the teeth on the external gear ring 248, and the teeth on the external gear ring 248 are used to drive the transmission gear 246 to rotate. The transmission gear 246 drives the threaded rod 241 to rotate, causing the lifting plate 242 to move downward. The lifting plate 242 pulls the slider 243 to move towards the center of the mounting base 21 through the connecting rod 244. The slider 243 drives the movable plate 221 to move towards the center of the mounting base 21 to clamp the circuit board. At the same time, the lifting plate 242 drives the L-shaped support 245 to move downward, causing the L-shaped support 245 to drive the support frame 26 to move downward. The support frame 26 drives the support frame 237 and the docking block 23 to move downward together, so that the varistor moves downward and is inserted into the circuit board.

[0042] During the process of the mounting base 21 being transferred from the welding station to the blanking station, the left end of the arc-shaped guide member 4 first contacts the guide post 235. The inclined surface at the left end of the arc-shaped guide member 4 guides and pushes the guide post 235 to move towards the center of the rotating table 11. The guide post 235 drives the docking block 23 to move together. At this time, the support frame 237 will move along the support frame 26 towards the center of the rotating table 11, causing the second reset spring 27 to be compressed and contracted. Since the varistor has been welded to the circuit board at this time, when the docking block 23 moves, the varistor will not move together with the docking block 23, realizing the separation of the docking block 23 from the varistor. Then, the transmission gear 246 meshes with the teeth of the internal gear ring 247, and the internal gear ring 247 drives the transmission gear 246 to rotate in the reverse direction, causing the lifting plate 242 to move upward along the threaded rod 241. The lifting plate 242 pushes the slider 243 to move away from the center of the mounting base 21 through the connecting rod 244, releasing the clamping of the circuit board by the contact clamping plate 222. At the same time, the lifting plate 242 pushes the support frame 26 upward through the L-shaped support member 245. The support frame 26 pushes the support frame 237 and the docking block 23 to move upward together, preventing the docking block 23 from obstructing the circuit board and facilitating the removal of the circuit board from the mounting base 21 at the blanking station.

[0043] During the process of the mounting base 21 being transferred from the blanking station to the loading station, the arc-shaped guide member 4 no longer limits the guide post 235. At this time, the resilience of the second reset spring 27 is used to push the support frame 237 and the docking block 23 to move away from the center of the rotating table 11, resetting the docking block 23 to facilitate the next welding of the varistor.

[0044] Please refer to Figure 3 and Figure 8 As shown in, the lifting assembly 25 includes a lever 251 rotatably mounted on the side of the support frame 237 close to the center of the rotating table 11. A fixed block 252 is rotatably connected to the side of the pushing block 233 close to the center of the rotating table 11. An activity slot is provided at one end of the lever 251 close to the corresponding fixed block 252, and the fixed block 252 is slidably mounted in the activity slot. A limiting frame 253 corresponding to the L-shaped support member 245 is fixedly connected to the outer side wall of the mounting base 21. The vertical section of the L-shaped support member 245 is slidably mounted up and down in the corresponding limiting frame 253. A T-shaped support rod 254 is fixedly connected to the limiting frame 253 on the side close to the lever 251, and one end of the lever 251 away from the fixed block 252 extends to the top of the horizontal section of the T-shaped support rod 254.

[0045] During the process of the mounting base 21 moving from the loading station to the welding station, the support frame 26 drives the support frame 237 and the docking block 23 to move downward. As the support frame 26 gradually approaches the mounting base 21, the T-shaped support rod 254 will push the end of the lever 251 away from the docking block 23 to tilt upward. At this time, the end of the lever 251 close to the docking block 23 will push the extrusion block 233 to move downward, and the extrusion block 233 squeezes the varistor to move downward. The triangular block 232 is used to expand and support the two pins at the bottom of the varistor, increasing the distance between the two pins, so that the pins are matched with the jacks on the circuit board. The expanded pins will be bent downward under the guidance of the channel between the triangular block 232 and the docking block 23, so that the bottom ends of the pins become vertical again, facilitating the insertion of the pins into the jacks.

[0046] Please refer to Figure 2 and Figure 9 As shown in [Figures] [X] and [Y], a stepping motor 12 for driving the rotary table 11 to rotate at a fixed angle is installed on the base 1. The output shaft of the stepping motor 12 is fixedly connected to the center of the bottom of the rotary table 11. A plain bearing coaxial with the stepping motor 12 is also installed between the top of the base 1 and the bottom of the rotary table 11.

[0047] The stepping motor 12 drives the rotary table 11 to rotate 120° each time. When the mounting base 21 moves to the loading station, the welding station, and the unloading station, the rotary table 11 will pause for a period of time to facilitate loading, welding, and unloading. The plain bearing plays a supporting role, facilitating the rotation of the rotary table 11 on the base 1.

[0048] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A varistor continuous welding device based on a rotary displacement structure, comprising a base table, a rotary table rotatably mounted on the top of the base table, and a welding mechanism fixedly mounted on the base table, characterized in that: A number of fixed docking mechanisms are evenly installed circumferentially on the top of the rotating table, and an arc-shaped guide is fixedly connected to the top of the bottom table through a bracket; The fixed docking mechanism includes a mounting base fixedly installed on the top of the rotating table. A clamping assembly for clamping and limiting the circuit board is installed on the mounting base. A support frame is vertically movably installed on the mounting base. A docking block for holding a varistor is slidably installed back and forth on the support frame. A driving assembly for driving the clamping assembly to perform centering and clamping and driving the support frame to move up and down is installed inside the mounting base. A second return spring for driving the docking block to move away from the center of the rotating table is installed on the support frame; A placement groove is formed on the side of the docking block away from the center of the rotating table. A triangular block for expanding, supporting and bending the pins of the varistor is fixedly installed at the bottom of the placement groove. A pushing block for extruding the varistor is slidably installed up and down inside the placement groove. A lifting assembly for driving the pushing block to move up and down is installed on the side of the support frame close to the center of the rotating table; When the docking block and the mounting base approach each other, the lifting assembly drives the pushing block to move downward under the drive of the support frame and extrudes the varistor, so that the pins of the varistor are expanded, supported and bent under the top support of the triangular block and are inserted into the jacks of the circuit board after the expansion and bending.

2. The varistor continuous welding device based on a rotary displacement structure according to claim 1, characterized in that: The clamping assembly includes movable plates evenly installed circumferentially on the mounting base. A clamping plate for clamping the circuit board is slidably installed on the side of the movable plate close to the center of the mounting base. A buffer spring for buffering is fixedly connected between the movable plate and the clamping plate.

3. A varistor continuous welding device based on a rotary displacement structure according to claim 1, characterized in that: A stop strip for blocking and limiting the varistor is fixedly connected to the side of the docking block away from the center of the rotating table. The stop strips are symmetrically distributed about the placement groove and are located on the side of the pushing block away from the center of the rotating table.

4. A varistor continuous welding device based on a rotary displacement structure according to claim 1, characterized in that: A guide post is fixedly installed on the top of the docking block. A first return spring is fixedly connected between the bottom of the pushing block and the inner wall of the docking block. Support frames are fixedly connected to both the left and right sides of the docking block. The vertical sections of the support frames are slidably installed on the top of the support frame along a direction parallel to the radial direction of the rotating table. The second return spring is fixedly connected between the rear side of the vertical section of the support frame and the inner wall of the support frame.

5. A varistor continuous welding device based on a rotary displacement structure according to claim 1, characterized in that: The driving assembly includes a threaded rod rotatably installed inside the mounting base. A lifting plate is threadedly connected to the outside of the threaded rod. The lifting plate is slidably installed up and down inside the mounting base. A number of sliders corresponding to the movable plates one by one are slidably installed on the top of the mounting base along a direction perpendicular to its center line. The movable plate is fixedly installed on the top of the movable plate. Connecting rods are hinged between the top of the lifting plate and the bottoms of the number of sliders.

6. The varistor continuous welding device based on a rotary displacement structure according to claim 5, characterized in that: The front side of the top of the rotating table is the loading station. The loading station rotates 120° clockwise to be the welding station. The welding station rotates 120° clockwise to be the unloading station. The welding mechanism is located at the welding station.

7. The varistor continuous welding device based on a rotary displacement structure according to claim 6, characterized in that: The driving assembly further includes L-shaped support members fixedly connected to the left and right sides of the lifting plate in a symmetric distribution. The L-shaped support members are slidably connected to the mounting base up and down. The top of the vertical section of the L-shaped support member is fixedly connected to the corresponding support frame. The bottom of the threaded rod rotates through to the lower side of the rotating table and is fixedly connected with a transmission gear. An internal gear ring and an external gear ring are fixedly installed on the top of the bottom table, and the internal gear ring and the external gear ring are respectively located inside and outside the transmission gear and partially have teeth. The teeth of the external gear ring are located between the feeding station and the welding station, and the teeth of the internal gear ring are located between the welding station and the discharging station.

8. A varistor continuous welding device based on a rotary displacement structure according to claim 7, characterized in that: The lifting assembly includes a lever rotatably installed on one side of the support frame close to the center of the rotating table. A fixed block is rotatably connected to one side of the pushing block close to the center of the rotating table. An activity groove is formed at one end of the lever close to the corresponding fixed block. The fixed block is slidably installed in the activity groove. A limiting frame corresponding to the L-shaped support member is fixedly connected to the outer side wall of the mounting base. The vertical section of the L-shaped support member is slidably installed up and down in the corresponding limiting frame. A T-shaped support rod is fixedly connected to the limiting frame close to the lever. One end of the lever away from the fixed block extends to the top of the horizontal section of the T-shaped support rod.

9. The varistor continuous welding device based on a rotary displacement structure according to claim 4, characterized in that: The arc-shaped guide member has an arc-shaped structure and its left end is provided with a wedge-shaped structure. The arc-shaped guide member is located between the welding station and the discharging station. The arc-shaped guide member is matched with the guide post and its height gradually increases in the clockwise direction.

10. A varistor continuous welding device based on a rotary displacement structure according to claim 1, characterized in that: A stepping motor for driving the rotating table to rotate at a fixed angle is installed on the bottom table. The output shaft of the stepping motor is fixedly connected to the center of the bottom of the rotating table. A plain bearing coaxial with the stepping motor is also installed between the top of the bottom table and the bottom of the rotating table.

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