High-frequency welding device

Abstract

The utility model discloses a high-frequency welding device, which relates to the technical field of high-frequency welding and comprises two welding units capable of simultaneously welding a plurality of workpieces respectively. The electric conduction mechanism is arranged between the two welding units and used for controlling power on and power off of the two welding units; each welding unit comprises two groups of welding mechanisms, the two groups of welding mechanisms are respectively provided with welding surfaces which are oppositely distributed, and at least one of the welding surfaces is provided with a protective coating. According to the high-frequency welding machine, the welding unit and the electric conduction mechanism are arranged in a matched mode, simultaneous welding of a plurality of workpieces can be achieved while energy of the high-frequency welding machine is not increased, and the production efficiency is improved; the protective coating is arranged on the welding surface of the welding mechanism, so that ignition and shutdown caused by too short distance of the welding surface when the welding mechanism is used for welding a workpiece are prevented, and the service life of equipment is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-frequency welding, and more specifically, to a high-frequency welding device. Background Art

[0002] Common welding methods for infusion nozzles are divided into heating rod heating welding and high-frequency welding. Heating rod heating welding is generally used for bag-type welding, welding between nozzles and bag-type welding, and welding at the interface of hard pipes, while high-frequency welding is generally used for closed welding of hose nozzles.

[0003] There are two ways to high-frequency weld the mouth tube. One is to manually place the empty bag on the fixture, and the filling device will fill the empty bag first. After filling, the mouth tube is welded and the bag is manually removed from the fixture. The other is to use a conveyor belt and fixture to transport the filled bag to the welding position, and then weld the mouth tube.

[0004] However, when using a high-frequency welding machine, the welding mechanisms on both sides are prone to sparking and stopping due to the welding molds being too close to each other; and the existing welding machine has low working efficiency and cannot ensure that multiple bags are welded simultaneously.

[0005] In summary, how to reduce the spark frequency of welding molds and improve the working efficiency of welding machines is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide a high-frequency welding device, which can effectively reduce the sparking frequency of the welding mold and improve the working efficiency of the welding machine.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A high-frequency welding device, comprising:

[0009] Welding units, two of which are provided, each for welding multiple workpieces simultaneously;

[0010] An electrical conduction mechanism is provided between the two welding units, and is used to control the on and off of the two welding units;

[0011] Each of the welding units includes a welding mechanism. Two groups of welding mechanisms are provided. The two groups of welding mechanisms respectively have relatively distributed welding surfaces, and at least one of the welding surfaces is provided with a protective coating.

[0012] Preferably, the welding mechanism includes:

[0013] Install the base plate;

[0014] A drive assembly is fixed to the mounting base, and the drive assembly has a displaceable telescopic end;

[0015] A front-end welding assembly is mounted on the telescopic end of the driving assembly to drive the front-end welding assembly toward or away from the welding position;

[0016] The guide assembly is installed on the installation base plate, and the front end welding assembly cooperates with the guide assembly to ensure the parallelism of welding.

[0017] Preferably, the drive assembly includes:

[0018] a first driver, fixed to the mounting base and having the telescopic end;

[0019] a driving connecting plate connected to the telescopic end of the first actuator via a floating joint;

[0020] An intermediate connecting piece is fixedly connected to the driving connecting plate on one side and to the front end welding assembly on the other side.

[0021] Preferably, the front-end welding assembly includes:

[0022] an insulating column connected to the driving assembly;

[0023] A mold fixing plate is fixed to a side of the insulating column away from the driving assembly;

[0024] A welding mold is mounted on the mold fixing plate, wherein the welding surface is formed on a side of the welding mold facing away from the mold fixing plate;

[0025] One end of the mold fixing plate is connected to the power supply unit of the high-frequency welding device through a cable, and the other end is connected to the electrical conduction mechanism through a cable.

[0026] Preferably, the guide assembly includes:

[0027] A bearing mounting seat, fixed to the mounting base;

[0028] A linear bearing is fixed on the bearing mounting seat;

[0029] The guide shaft is fitted in the linear bearing, and the driving connecting plate is connected to one end of the guide shaft.

[0030] Preferably, a first limit plate is provided on the mounting base plate, and the first limit plate is fixed to the other end of the guide shaft. When the first driver drives the driving connecting plate to move, the first limit plate moves synchronously. A limit block is provided on at least one side of the moving direction of the first limit plate, and the limit block is fixed on the mounting base plate. A limit screw is also installed on the first limit plate, and the limit screw can abut against the limit block.

[0031] Preferably, the electrical conduction mechanism includes:

[0032] a support plate, fixed between the two welding units;

[0033] A conducting plate, movably mounted on the supporting plate;

[0034] There are two conducting blocks, which are fixed on the support plate and located on both sides of the conducting plate. The two conducting blocks are respectively connected to the two welding units through cables;

[0035] A second driver is installed on the support plate and connected to the conducting plate, and drives the conducting plate to move between the two conducting blocks.

[0036] Preferably, a second limiting plate is further fixed on the support plate, and the second limiting plate is arranged on a side of the conducting plate away from the second driver to limit the movement range of the conducting plate.

[0037] Preferably, it also includes:

[0038] A welding machine, on which the welding unit and the electrical conduction mechanism are both installed;

[0039] A conveying assembly is installed on the welding machine and is located below the welding unit;

[0040] The clamp is installed on the conveying assembly to clamp and fix the workpiece so as to be able to drive the workpiece to move into the welding position or move out of the welding position.

[0041] Preferably, a protective cover is fixed on the welding machine, the welding unit and the electrical conduction mechanism are both accommodated in the protective cover, and the conveying assembly is located below the protective cover.

[0042] The high-frequency welding device provided by the utility model includes a welding unit and an electrical conduction mechanism. Two welding units are provided, each capable of simultaneously welding multiple workpieces. The electrical conduction mechanism is arranged between the two welding units and is used to control the power on and off of the two welding units. Each welding unit includes a welding mechanism. Two groups of welding mechanisms are provided. The two groups of welding mechanisms respectively have relatively distributed welding surfaces, and at least one of the welding surfaces is provided with a protective coating.

[0043] The high-frequency welding device provided by this utility model utilizes a welding unit and an electrical conduction mechanism to achieve simultaneous welding of multiple workpieces without increasing the energy consumption of the high-frequency welding machine, thereby increasing production efficiency. Furthermore, a protective coating is provided on the welding surface of the welding mechanism to prevent the welding mechanism from sparking and shutting down due to the welding surfaces being too close together when welding workpieces, effectively extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0045] Figure 1 It is a schematic diagram of the front structure of the high-frequency welding device;

[0046] Figure 2 Schematic diagram of the top view of the welding unit;

[0047] Figure 3 for Figure 1 A schematic diagram of the structure at center A;

[0048] Figure 4 Schematic diagram of the top view of the electrical conduction mechanism;

[0049] Figure 5 for Figure 1 A magnified schematic diagram of the structure at point B.

[0050] Figure 1-Figure 5 , the reference numerals include:

[0051] 01. Welding unit; 1. Welding mechanism; 11. Installing base plate;

[0052] 12. Drive assembly; 121. First drive; 122. Drive connecting plate; 123. Intermediate connecting member;

[0053] 13. Front-end welding assembly; 131. Insulation column; 132. Mold fixing plate; 133. Welding mold;

[0054] 14. Guide assembly; 141. Bearing mounting seat; 142. Linear bearing; 143. Guide shaft;

[0055] 15. First limiting plate; 16. Limiting block; 17. Limiting screw;

[0056] 2. Electrical conduction mechanism; 21. Support plate; 22. Conductive plate; 23. Conductive block; 24. Second driver; 25. Second limit plate;

[0057] 3. Welding machine; 4. Conveying assembly; 5. Fixture; 6. Protective cover. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present application do not indicate any order, quantity or importance. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. The embodiment of the present application discloses a high-frequency welding device.

[0060] Please refer to Figures 1 to 5 .

[0061] The high-frequency welding device provided by the present invention includes two welding units 01 and an electrical conduction mechanism 2. Two welding units 01 are provided, each capable of simultaneously welding multiple workpieces. The electrical conduction mechanism 2 is disposed between the two welding units 01 and is used to control the power on and off of the two welding units 01. Each welding unit 01 includes a welding mechanism 1, which is provided in two groups. The two groups of welding mechanisms 1 have opposing welding surfaces, at least one of which is provided with a protective coating.

[0062] The above-mentioned high-frequency welding device utilizes the coordinated setting of the welding unit 01 and the electrical conduction mechanism 2 to achieve simultaneous welding of multiple workpieces without increasing the energy of the high-frequency welding machine, thereby increasing production efficiency; by providing a protective coating on the welding surface of the welding mechanism 1, the welding mechanism 1 is prevented from sparking and stopping due to the welding surface being too close when welding the workpiece, thereby effectively improving the service life of the equipment.

[0063] The high-frequency welding device provided by the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments.

[0064] In a specific embodiment, reference Figure 2 The welding mechanism 1 includes a mounting base plate 11, a driving assembly 12, a front-end welding assembly 13 and a guide assembly 14. The driving assembly 12 is fixed on the mounting base plate 11. The driving assembly 12 has a movable telescopic end. The front-end welding assembly 13 is installed on the telescopic end of the driving assembly 12 to drive the front-end welding assembly 13 close to or away from the welding position. The guide assembly 14 is installed on the mounting base plate 11. The front-end welding assembly 13 cooperates with the guide assembly 14 to ensure the parallelism of the welding.

[0065] Specifically, the mounting base 11 is a horizontal plate-like structure laid on the welding device and remains relatively stationary with the welding device, providing basic support for the drive assembly 12, front welding assembly 13, and guide assembly 14. The mounting bases 11 of the two welding mechanisms 1 in the same welding unit 01 are located on the same horizontal plane, and the two mounting bases 11 are spaced apart. The telescopic ends of the drive assemblies 12 mounted on the two mounting bases 11 are arranged opposite each other, with the telescopic direction parallel to the extension direction of the mounting bases 11.

[0066] Furthermore, the front welding assembly 13 is fixed to the telescopic end. Driven by the drive assembly 12, the front welding assembly 13 of the two welding mechanisms 1 can be moved closer or further apart. Furthermore, welding can be performed when the two front welding assemblies 13 are close together and then moved away from each other after welding. The welding position of the workpiece is formed between the two front welding assemblies 13 after the drive assembly 12 is extended a certain distance. The overall length of the front welding assembly 13 is perpendicular to the telescopic direction of the drive assembly 12.

[0067] It should also be noted that the guide assembly 14 can limit and guide the front-end welding assembly 13 during its movement to ensure the stability of the welding action.

[0068] Based on any of the above embodiments, Figure 2The drive assembly 12 includes a first driver 121, a drive connecting plate 122 and an intermediate connecting member 123. The first driver 121 is fixed on the mounting base 11 and has a telescopic end. The drive connecting plate 122 is connected to the telescopic end of the first driver 121 through a floating joint. One side of the intermediate connecting member 123 is fixedly connected to the drive connecting plate 122, and the other side is fixedly connected to the front end welding assembly 13.

[0069] Specifically, the first driver 121 adopts a cylinder, the main part of the cylinder is fixed on the mounting base 11, and one end of the telescopic part is connected to the driving connecting plate 122 through a floating structure. When the cylinder extends or retracts, it drives the driving connecting plate 122 to move synchronously. The intermediate connecting member 123 is formed on the side of the driving connecting plate 122 away from the first driver 121. The side of the intermediate connecting member 123 away from the driving connecting plate 122 is used to connect and fix the front end welding assembly 13.

[0070] Preferably, the driving connecting plate 122 and the intermediate connecting piece 123 can both be made of stainless steel, specifically 06Cr16Ni10.

[0071] Based on any of the above embodiments, Figure 1 and Figure 3 The front-end welding assembly 13 includes an insulating column 131, a mold fixing plate 132 and a welding mold 133. The insulating column 131 is connected to the driving assembly 12. The mold fixing plate 132 is fixed to the side of the insulating column 131 away from the driving assembly 12. The welding mold 133 is installed on the mold fixing plate 132. The welding surface is formed on the side of the welding mold 133 away from the mold fixing plate 132. One end of the mold fixing plate 132 is connected to the power supply unit of the high-frequency welding device through a cable, and the other end is connected to the electrical conduction mechanism 2 through a cable.

[0072] Specifically, the insulating column 131 is arranged between the intermediate connector 123 and the mold fixing plate 132. When the welding device energizes the mold fixing plate 132 through the electrical conduction mechanism 2, the insulating column 131 can prevent the current from being conducted to the drive assembly 12, thereby providing protection for the drive assembly 12 and other components. When the drive assembly 12 is in operation, the first driver 121 drives the insulating column 131 and the mold fixing plate 132 to move synchronously by driving the connecting plate 122 and the intermediate connector 123, and the welding mold 133 is installed on the mold fixing plate 132, so the welding mold 133 moves accordingly. When the welding device passes high-frequency alternating current to the mold fixing plate 132, the mold fixing plate 132 will generate additional current, thereby generating heat to form a high-temperature environment, and the welding action of the workpiece is completed by high temperature. The above-mentioned welding surface is the side of the welding mold 133 facing away from the welding mold fixing plate 132. The protective coating provided on the welding surface can specifically be a Teflon coating.

[0073] Based on any of the above embodiments, Figure 2 The guide assembly 14 includes a bearing mounting seat 141, a linear bearing 142 and a guide shaft 143. The bearing mounting seat 141 is fixed on the mounting base 11, the linear bearing 142 is fixed on the bearing mounting seat 141, the guide shaft 143 is fitted in the linear bearing 142, and the driving connecting plate 122 is connected to one end of the guide shaft 143.

[0074] Specifically, the connection position between the driving connecting plate 122 and the first driver 121 is in the middle of the driving connecting plate 122, and there are two groups of guide components 14, which are respectively arranged on both sides of the first driver 121 and the three are parallel to each other. The guide shaft 143 inserted into the linear bearing 142 can move along the telescopic direction of the first driver 121, thereby realizing the limitation and guidance of the driving connecting plate 122.

[0075] Based on any of the above embodiments, Figure 2 A first limit plate 15 is provided on the mounting base 11, and the first limit plate 15 is fixed to the other end of the guide shaft 143. When the first driver 121 drives the driving connecting plate 122 to move, the first limit plate 15 moves synchronously. A limit block 16 is provided on at least one side of the moving direction of the first limit plate 15. The limit block 16 is fixed on the mounting base 11. A limit screw 17 is also installed on the first limit plate 15, and the limit screw 17 can abut against the limit block 16.

[0076] Specifically, the first limit plate 15 and the driving connecting plate 122 are arranged opposite each other, and are respectively fixed to the two ends of the guide shaft 143. The first limit plate 15 is movable. When the first driver 121 drives the driving connecting plate 122 to move, the first limit plate 15 will also move synchronously due to the fixed length of the guide shaft 143.

[0077] Furthermore, in order to limit the moving range of the driving connecting plate 122 and the front-end welding assembly 13 connected thereto, a limit block 16 is fixedly provided on the mounting base plate 11. The limit block 16 is located on the side of the first limit plate 15 facing the driving connecting plate 122. When the first limit plate 15 moves a certain distance along with the driving connecting plate 122, it abuts against the limit block 16 to limit its continued forward movement, thereby achieving the limitation of the position of the front-end welding assembly 13.

[0078] Based on any of the above embodiments, a limit screw 17 is installed on the first limit plate 15. When the driving connecting plate 122 moves to the maximum stroke, the limit screw 17 abuts against the limit block 16. Furthermore, a threaded hole is formed on the first limit plate 15, and the limit screw 17 is screwed into the threaded hole. By screwing the limit screw 17 in or out, the distance between the abutment surface of the limit screw 17 and the abutment surface of the limit block 16 can be adjusted, thereby achieving the adjustment of the maximum displacement stroke of the driving connecting plate 122 and the front end welding assembly 13.

[0079] Specifically, the coordination of the first limiting plate 15 , the limiting block 16 and the limiting screw 17 can prevent the first driver 121 from extending too far, thereby preventing the welding dies 133 of the two welding mechanisms 1 from docking and short-circuiting.

[0080] Based on any of the above embodiments, Figure 4 The electrical conduction mechanism 2 includes a support plate 21, a conduction plate 22, a conduction block 23 and a second driver 24. The support plate 21 is fixed between the two welding units 01. The conduction plate 22 is movably mounted on the support plate 21. There are two conduction blocks 23. The two conduction blocks 23 are fixed on the support plate 21 and are respectively located on both sides of the conduction plate 22. The two conduction blocks 23 are respectively connected to the two welding units 01 through cables. The second driver 24 is installed on the support plate 21 and connected to the conduction plate 22, driving the conduction plate 22 to move between the first and second conduction blocks 23.

[0081] Specifically, the support plate 21 is located above the welding unit 01 and is arranged horizontally. It is fixed to the welding device by welding columns and other components. The second driver 24 and the two conductive blocks 23 are all installed on the support plate 21. When the second driver 24 extends or retracts, it will contact one of the two conductive blocks 23 respectively, and the two conductive blocks 23 are respectively connected to the mold fixing plates 132 of the two welding units 01 through cables.

[0082] Furthermore, by connecting the conductive plate 22 to the welding device using a cable, and connecting one end of the mold fixing plate 132 to the welding device and the other end to the first and second conductive blocks 23, it can be achieved that when the conductive plate 22 contacts the first conductive block, the welding device forms a closed loop with one of the welding units 01, and the workpiece can complete the welding action in the welding unit 01; when the conductive plate 22 contacts the second conductive block, the welding device forms a closed loop with the other welding unit 01, and the workpiece can complete the welding action in the welding unit 01.

[0083] It should also be noted that an insulating seat is fixed on the support plate 21, and the first and second conductive blocks 23 are installed in the insulating seat, which plays a role of isolation and protection.

[0084] Based on any of the above embodiments, Figure 4 A second limiting plate 25 is also fixed on the support plate 21 . The second limiting plate 25 is arranged on a side of the conducting plate 22 away from the second driver 24 to limit the movement range of the conducting plate 22 .

[0085] Specifically, the second limiting plate 25 is fixed to the front side of the second driver 24 in the extending direction to limit the displacement distance of the second limiting plate 25 .

[0086] Based on any of the above embodiments, Figure 1 The high-frequency welding device provided by the present invention also includes a welding machine 3, a conveying component 4 and a clamp 5. The welding unit 01 of the welding machine 3 and the electrical conduction mechanism 2 are both installed on the welding machine 3. The conveying component 4 is installed on the welding machine 3 and is located below the welding unit 01. The clamp 5 is installed on the conveying component 4 to clamp and fix the workpiece so as to be able to drive the workpiece into the welding position or move it out of the welding position.

[0087] Specifically, the welding platform 3 is mounted on the welding device and has a work surface that provides basic support for the aforementioned components. Welding columns and other components are fixed to the welding platform 3 to ensure that each component is at the required height. A conveyor assembly 4 is located below the welding unit 01. When the conveyor assembly 4 is activated, the fixture 5 moves on the conveyor assembly 4. The welding position between the two welding mechanisms 1 is located on the movement path of the fixture 5. The workpiece output from the previous process is transferred to the conveyor assembly 4 and secured by the fixture 5. The conveyor assembly 4 is then activated to move the fixture 5 and the workpiece to the welding position. After the welding unit 01 completes the welding, the conveyor assembly 4 further drives the workpiece out of the welding device.

[0088] It should be noted that in order to improve the smoothness and automation of the overall workpiece production process, the conveying component 4 can be set to connect one end to the output end of the previous process and the other end to the input end of the next process, so that the workpiece output from the previous process can be directly transmitted to the welding position, and then directly transmitted to the next process after welding is completed.

[0089] Furthermore, the conveying component 4 is preferably configured as an annular conveyor belt, and the clamp 5 is fixed on the annular conveyor belt. When the workpiece is welded and transferred to the next process, the clamp 5 is released to remove the workpiece, and then the clamp 5 can be returned to the previous process with the annular conveyor belt, thereby realizing automatic welding and transfer back and forth.

[0090] Based on any of the above embodiments, Figure 1 A protective cover 6 is fixed on the welding machine 3 , the welding unit 01 and the electrical conduction mechanism 2 are both accommodated in the protective cover 6 , and the conveying component 4 is located below the protective cover 6 .

[0091] Specifically, the protective cover 6 is fixed on the above-mentioned working surface, and the whole can be set as a square shell-like structure. The welding unit 01 and the electrical conduction mechanism 2 are both arranged inside the protective cover 6, which can be used to recover the heat lost during welding and protect the internal components.

[0092] It should also be noted that in order to ensure smooth welding of the workpiece, the side of the protective cover 6 close to the welding position should have a through slot for the clamp 5 to pass through. When the conveying assembly 4 drives the clamp 5 and the workpiece to pass through, at least the part of the workpiece to be welded can pass through the through slot into the welding position to complete the welding.

[0093] The above describes in detail the high-frequency welding device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A high frequency welding device, characterized in that: include: Welding units (01), wherein two welding units (01) are provided, each for simultaneously welding multiple workpieces; An electrical conduction mechanism (2) is provided between the two welding units (01), and the electrical conduction mechanism (2) is used to control the on and off of the two welding units (01); Each welding unit (01) comprises a welding mechanism (1), wherein two groups of welding mechanisms (1) are provided, and the two groups of welding mechanisms (1) respectively have relatively distributed welding surfaces, and at least one of the welding surfaces is provided with a protective coating.

2. A high frequency welding device according to claim 1, characterized in that: Each of the welding mechanisms (1) comprises: Install the base plate (11); A drive assembly (12) is fixed on the mounting base plate (11), and the drive assembly (12) has a displaceable telescopic end; A front-end welding assembly (13) is mounted on the telescopic end of the driving assembly (12) to drive the front-end welding assembly (13) toward or away from a welding position; The guide assembly (14) is mounted on the mounting base plate (11), and the front end welding assembly (13) cooperates with the guide assembly (14) to ensure the parallelism of welding.

3. A high frequency welding device according to claim 2, characterized in that: The driving assembly (12) comprises: A first driver (121) is fixed on the mounting base (11) and has a telescopic end; A driving connecting plate (122) connected to the telescopic end of the first driver (121) via a floating joint; An intermediate connecting member (123) is fixedly connected to the driving connecting plate (122) on one side and fixedly connected to the front end welding assembly (13) on the other side.

4. A high frequency welding device according to claim 2, characterized in that: The front end welding assembly (13) comprises: An insulating column (131) connected to the driving assembly (12); A mold fixing plate (132) is fixed to a side of the insulating column (131) away from the driving assembly (12); A welding mold (133) is mounted on the mold fixing plate (132), and the welding surface is formed on a side of the welding mold (133) facing away from the mold fixing plate (132); One end of the mold fixing plate (132) is connected to the power supply unit via a cable, and the other end is connected to the electrical conduction mechanism (2) via a cable.

5. The high frequency welding device according to claim 3, characterized in that: The guide assembly (14) comprises: A bearing mounting seat (141) is fixed on the mounting base (11); A linear bearing (142) is fixed on the bearing mounting seat (141); The guide shaft (143) is fitted into the linear bearing (142), and the driving connecting plate (122) is connected to one end of the guide shaft (143).

6. A high frequency welding device according to claim 5, characterized in that: A first limit plate (15) is provided on the mounting base plate (11), and the first limit plate (15) is fixed to the other end of the guide shaft (143). When the first driver (121) drives the driving connecting plate (122) to move, the first limit plate (15) moves synchronously. A limit block (16) is provided on at least one side of the moving direction of the first limit plate (15), and the limit block (16) is fixed on the mounting base plate (11). A limit screw (17) is also installed on the first limit plate (15), and the limit screw (17) can abut against the limit block (16).

7. The high frequency welding device according to claim 1, characterized in that: The electrical conduction mechanism (2) comprises: A support plate (21) is fixed between the two welding units (01); A conducting plate (22) is movably mounted on the supporting plate (21); Two conducting blocks (23) are provided in total. The two conducting blocks (23) are fixed on the support plate (21) and located on both sides of the conducting plate (22). The two conducting blocks (23) are electrically connected to the two welding units (01) respectively. A second driver (24) is mounted on the support plate (21) and connected to the conduction plate (22), driving the conduction plate (22) to move between the two conduction blocks (23).

8. A high frequency welding device according to claim 7, characterized in that: A second limiting plate (25) is also fixed on the support plate (21), and the second limiting plate (25) is arranged on a side of the conducting plate (22) away from the second driver (24) to limit the movement range of the conducting plate (22).

9. A high frequency welding device according to any one of claims 1 to 8, characterized in that: Also includes: A welding machine (3), wherein the welding unit (01) and the electrical conduction mechanism (2) are both installed on the welding machine (3); A conveying assembly (4) is mounted on the welding machine (3) and is located below the welding unit (01); A clamp (5) is mounted on the conveying assembly (4) and clamps and fixes the workpiece so as to be able to drive the workpiece to move into a welding position or move it out of a welding position.

10. The high frequency welding device according to claim 9, characterized in that: A protective cover (6) is fixed on the welding machine (3), the welding unit (01) and the electrical conduction mechanism (2) are both accommodated in the protective cover (6), and the conveying assembly (4) is located below the protective cover (6).

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