Piezoresistor continuous welding equipment based on rotary displacement structure

Abstract

The invention relates to the field of voltage dependent resistor welding equipment, in particular to a voltage dependent resistor welding device which is characterized in that a triangular block, a pushing block, a driving assembly and a lifting assembly are matched with one another, in the fixing and butt joint process of the voltage dependent resistor, the voltage dependent resistor is extruded, and pins of the voltage dependent resistor are expanded, supported and bent through the triangular block; and the pins of the piezoresistor are aligned with the jacks on the circuit board, so that the piezoresistor and the circuit board can be quickly butted, and the welding efficiency of the piezoresistor is improved. According to the invention, the triangular block, the pushing block, the driving assembly and the lifting assembly cooperate with each other, and the piezoresistor is extruded in the process of fixing and butting the piezoresistor, so that the triangular block expands and bends the pins of the piezoresistor, and the pins of the piezoresistor are aligned with the jacks in the circuit board; rapid butt joint of the piezoresistor and the circuit board is facilitated, and the welding efficiency of the piezoresistor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of varistor welding equipment, and specifically relates to a varistor continuous 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 withstands 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 volume of the varistor is small, 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] In order to solve the above problems, the present invention provides a varistor continuous welding equipment based on a rotary displacement structure, including a bottom table, a rotary 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 rotary 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 holding 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 return 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 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.

[0007] In a possible implementation manner, 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 on the left and right 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 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 the radial direction parallel to 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.

[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 plates are fixedly installed on the top of the movable plates. 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, each partially having teeth, are fixedly installed on the top of the base table and are located inside and outside the transmission gear respectively. 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. One side of the pushing block close to the center of the rotating table is rotatably connected to a fixed block. 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. One 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 base table. The output shaft of the stepping motor is fixedly connected to the center of the bottom of the rotating table. A planar bearing coaxial with the stepping motor is also installed between the top of the base table and the bottom of the rotating table.

[0015] Advantages of the present invention: 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 rapid 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 and welded together. 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 of the varistor moving 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 presses the piezoresistor.

[0023] Figure 7 is a front sectional view of the driving 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, the external gear ring and the internal gear ring of the present invention.

[0026] In the figure: 1, base table; 11, rotating table; 12, stepper motor; 2, fixed docking mechanism; 21, mounting seat; 22, clamping assembly; 221, movable plate; 222, clamping plate; 223, buffer spring; 23, docking block; 231, placement groove; 232, triangular block; 233, pushing block; 234, retaining strip; 235, guiding column; 236, first reset spring; 237, support frame; 24, driving assembly; 241, threaded rod; 242, lifting plate; 243, slider; 244, connecting rod; 245, L-shaped support member; 246, transmission gear; 247, internal gear ring; 248, external gear ring; 25, lifting assembly; 251, lever; 252, fixed block; 253, limiting frame; 254, T-shaped support rod; 26, support frame; 27, second reset 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 in detail the specific embodiments of the present invention 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 1, a rotary table 11 rotatably installed on the top of the base 1, and a welding mechanism 3 fixedly installed on the base 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 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 carrying the varistor is slidably installed back and forth on the support frame 26. 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 extruding 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 second return spring 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 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 top center of the mounting seat 21, and the edge of the circuit board is parallel to the corresponding clamping plate 222. The driving component 24 drives several movable plates 221 to move toward the center of the mounting seat 21 at the same time. The movable plate 221 pushes the clamping plate 222 to move toward the center of the mounting seat 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 conflicts with the edge of the circuit board, the movable plate 221 continues to move toward the center of the mounting seat 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 clamping the circuit board too much and causing damage to it.

[0032] See also Figure 5 and Figure 6 A baffle 234 for blocking and limiting the varistor is fixedly connected to the side of the docking block 23 away from the center of the rotating table 11. The baffle 234 is symmetrically distributed about the placement groove 231 and is located on the side of the pushing block 233 away from the center of the rotating table 11. The top and bottom of the baffle 234 respectively reserve space for the varistor to enter and leave the placement groove 231.

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

[0034] See also Figure 3 , Figure 5 and Figure 8 A guide column 235 is fixedly installed on the top of the docking block 23, a return spring 236 is fixedly connected between the bottom of the pushing block 233 and the inner wall of the docking block 23, and support frames 237 are fixedly connected on the left and right sides of the docking block 23. The vertical section of the support frame 237 is slidably installed on the top of the support frame 26 along a radial direction parallel to the rotating table 11, and the return 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] When the docking block 23 moves downward, the lifting assembly 25 will push the pushing block 233 downward to squeeze the varistor. At this time, the reset spring 236 will be compressed and contracted. When the docking block 23 moves upward, the rebound force of the reset spring 236 is used to push the pushing block 233 to move upward and reset.

[0036] See also Figure 1 and Figure 2, the front side of 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 electric soldering irons installed on the electric push rod. When the mounting seat 21 moves to the welding station, the two electric 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 off 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. The outer part of the threaded rod 241 is threadedly connected with a lifting plate 242. The lifting 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 the 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 lifting plate 242 and the bottom of a plurality of sliders 243.

[0039] Please refer to Figure 2 , Figure 3 and Figure 7, the driving assembly 24 further includes L-shaped supports 245 fixedly connected to the left and right sides of the lifting plate 242 symmetrically. 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, which are respectively located inside and outside the transmission gear 246 and partially have teeth, are fixedly installed on the top of the base 1. 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 engage 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, causing the varistor to move downward and be 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 rotary 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 rotary 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 rotary 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 rotary table 11. A fixed block 252 is rotatably connected to the side of the pushing block 233 close to the center of the rotary table 11. An activity slot is formed 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 pushing block 233 to move downward. The pushing block 233 squeezes the varistor to move downward, and the triangular block 232 is used to expand the two pins at the bottom of the varistor to increase the distance between the two pins so that the pins match the sockets on the circuit board. The expanded pins will bend downward under the guidance of the channel between the triangular block 232 and the docking block 23, so that the bottom end of the pin will become vertical again, which is convenient for the pin to be inserted into the socket.

[0046] See also Figure 2 and Figure 9 A stepper motor 12 is installed on the base 1 to drive the rotating table 11 to rotate at a fixed angle. The output shaft of the stepper motor 12 is fixedly connected to the center of the bottom of the rotating table 11. A plane bearing coaxial with the stepper motor 12 is also installed between the top of the base 1 and the bottom of the rotating table 11.

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

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A varistor continuous welding device based on a rotary displacement structure, comprising a base, a rotating table rotatably mounted on the top of the base, and a welding mechanism fixedly mounted on the base, characterized in that: A plurality of fixed docking mechanisms are evenly installed on the top of the rotating platform in the circumferential direction, and an arc-shaped guide is fixedly connected to the top of the bottom platform through a bracket; The fixed docking mechanism comprises a mounting seat fixedly mounted on the top of the rotating table, a clamping assembly for clamping and limiting the circuit board is mounted on the mounting seat, a support frame is movably mounted on the mounting seat, a docking block for accommodating a varistor is slidably mounted on the support frame, a driving assembly for driving the clamping assembly to implement centering clamping and driving the support frame to move up and down is mounted inside the mounting seat, and a return spring 2 for driving the docking block to move away from the center of the rotating table is mounted on the support frame; A placement groove is provided on the side of the docking block away from the center of the rotating table, a triangular block for expanding and bending the pins of the varistor is fixedly installed at the bottom of the placement groove, a pushing block for squeezing the varistor is installed in the placement groove so as to slide up and down, and a lifting component 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 seat are close to each other, the lifting assembly pushes the pushing block downward under the drive of the support frame and squeezes the varistor, so that the pins of the varistor are expanded and bent under the top support of the triangular block and then plugged into the sockets of the circuit board after expansion and bending.

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

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

4. The varistor continuous welding equipment based on the rotary displacement structure according to claim 1 is characterized in that: A guide column is fixedly installed on the top of the docking block, and a return spring 1 is fixedly connected between the bottom of the pushing block and the inner wall of the docking block. Support frames are fixedly connected to the left and right sides of the docking block. The vertical section of the support frame is slidably installed on the top of the support frame along a radial direction parallel to the rotating table, and the return spring 2 is fixedly connected between the rear side of the vertical section of the support frame and the inner wall of the support frame.

5. The varistor continuous welding equipment based on the rotary displacement structure according to claim 1 is characterized in that: The driving assembly includes a threaded rod rotatably mounted inside a mounting seat, the external thread of the threaded rod is connected to a lifting plate, the lifting plate is slidably mounted inside the mounting seat up and down, a plurality of sliders corresponding to the movable plate are slidably mounted on the top of the mounting seat in a direction perpendicular to its center line, the movable plate is fixedly mounted on the top of the movable plate, and connecting rods are hinged between the top of the lifting plate and the bottoms of the plurality of sliders.

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

7. The varistor continuous welding equipment based on the rotary displacement structure according to claim 6 is characterized in that: The driving assembly also includes an L-shaped support member fixedly connected to the lifting plate and symmetrically distributed on the left and right sides. The L-shaped support member is slidably connected to the mounting seat up and down, and 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 and passes through the bottom of the rotating table and is fixedly connected to a transmission gear. The top of the base table is fixedly installed with an inner gear ring and an outer gear ring respectively located on the inner and outer sides of the transmission gear and partially having teeth. The teeth of the outer gear ring are located between the loading station and the welding station, and the teeth of the inner gear ring are located between the welding station and the unloading station.

8. The varistor continuous welding equipment based on the rotary displacement structure according to claim 7 is characterized in that: The lifting assembly includes a lever rotatably mounted on a support frame on one side close to the center of the rotating table, a pushing block is rotatably connected to a fixed block on one side close to the center of the rotating table, a movable groove is provided at one end of the lever close to the corresponding fixed block, the fixed block is slidably mounted in the movable groove, a limit frame corresponding to the L-shaped support piece is fixedly connected to the outer wall of the mounting seat, the vertical section of the L-shaped support piece is slidably mounted in the corresponding limit frame up and down, a T-shaped support rod is fixedly connected to the limit frame close to the side of the lever, and the 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 equipment based on the rotary displacement structure according to claim 4 is characterized in that: The arc-shaped guide is in an arc-shaped structure and its left end is arranged in a wedge-shaped structure. The arc-shaped guide is located between the welding station and the blanking station. The arc-shaped guide cooperates with the guide column and its height gradually increases in the clockwise direction.

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

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