Resistance welding device

Abstract

The utility model relates to the technical field of transformer production equipment, and in particular to a resistance welding device, including a resistance welding structure, a fixing structure and a clamping structure; the fixing structure includes a fixing plate and an upper plate surface thereof, on which a first fixing seat for fixing the coil body of the transformer and a second fixing seat for fixing the wiring terminal of the transformer are installed, the wiring terminals of the wiring terminal are overlapped with the wiring terminals of the coil body, overlapped with each other and provided with welding pieces, and the resistance welding structure is used for double-sided double-spot welding of the overlap and the welding piece; the clamping structure includes an adjustment component and a driving component respectively used to adjust the position and movement of two clamping fixtures, and the two clamping fixtures move closer to each other to clamp the overlap and both sides of the welding piece. The utility model adopts the double-sided double-spot overcurrent welding technology of the resistance welding structure, and at the same time, adds a fixing structure and a clamping structure to take corresponding positioning measures to avoid the problem of welding piece misalignment, which can ensure the welding quality and improve the overall performance of the transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer production equipment, in particular to a resistance welding device. Background Art

[0002] In the transformer manufacturing process, the connection between the coil body and the terminal is a crucial link. In order to ensure the reliability and stability of the electrical connection, the soldering lug is used as a bridge and clamped between the terminal of the coil body and the terminal of the terminal. The role of the soldering lug is not only to conduct current, but also to withstand various stresses and vibrations that may occur during the operation of the transformer.

[0003] Therefore, double-sided double-point overcurrent welding technology came into being. This technology applies current and pressure on both sides of the coil body terminal and the terminal terminal at the same time, so that the welding piece clamped between the two can be melted evenly and form a firm connection with the coil body and the terminal. Compared with traditional single-point welding, double-sided double-point overcurrent welding has higher welding efficiency and stronger welding strength.

[0004] However, despite the many advantages of double-sided double-point overcurrent welding technology, it is still necessary to pay attention to avoid the problem of welding piece misalignment in practical applications. Because if the welding piece is misaligned during the welding process, it will lead to poor welding quality, which will affect the overall performance of the transformer. In order to meet the strict welding requirements, it is necessary to propose a resistance welding device. Utility Model Content

[0005] The utility model aims to provide a resistance welding device, which adopts the double-sided double-point overcurrent welding technology of the resistance welding structure, and at the same time, adds a fixing structure and a clamping structure to take corresponding positioning measures to avoid the problem of welding piece misalignment, thereby ensuring the welding quality and improving the overall performance of the transformer.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A resistance welding device comprises a resistance welding structure, a fixing structure and a clamping structure which are arranged in sequence from front to back;

[0008] The resistance welding structure comprises a support frame, a synchronous drive assembly and two groups of resistance welding bodies, the two groups of resistance welding bodies are respectively installed at the upper end and the lower end of the support frame, and the synchronous drive assembly is used to drive the two resistance welding bodies to move away from or towards each other;

[0009] The fixing structure comprises a fixing plate, and a first fixing seat and a second fixing seat are installed on the upper plate surface of the fixing plate, the first fixing seat is used to fix the coil body of the transformer, and the second fixing seat is used to fix the connection terminal of the transformer, the connection terminal of the connection terminal is overlapped above the connection terminal of the coil body, and a welding piece is provided at the overlap, and the movement of the two resistance welding bodies close to each other is used to weld the overlap and the welding piece;

[0010] The clamping structure includes an adjustment component, a drive component and two clamping fixtures. The adjustment component is used to adjust the positions of the two clamping fixtures. The drive component is used to drive the two clamping fixtures to move away from or towards each other. The movement of the two clamping fixtures towards each other is used to clamp the overlap and both sides of the welding piece.

[0011] Preferably, the clamping fixture is an L-shaped piece, and an adjusting slider is protruding from the outer surface of one end of the clamping fixture;

[0012] The driving assembly includes an adjustable driving motor and a guide block;

[0013] The output end of the adjustment drive motor is sleeved with a drive sleeve, and the periphery of the drive sleeve is correspondingly hinged with two groups of connecting rods, and the other ends of the two groups of connecting rods are correspondingly hinged on the corresponding adjustment sliders;

[0014] The guide block is provided with a slide groove adapted to the adjusting slider, and the adjusting slider is slidably mounted on the slide groove.

[0015] Preferably, the other end of the clamping fixture is provided with a pressing surface for pressing the overlapping portion, and a high temperature resistant elastomer is also installed on the pressing surface.

[0016] Preferably, the adjustment assembly includes a height adjustment subassembly and a movement adjustment subassembly;

[0017] The height adjustment subassembly includes a height adjustment base, a height adjustment column and a height adjustment block;

[0018] The height adjustment column is inserted above the height adjustment base, and the height adjustment block is detachably sleeved on the height adjustment column;

[0019] The movable adjustment subassembly is fixedly mounted on the height adjustment block.

[0020] Preferably, the movement and adjustment subassembly comprises a transverse movement cylinder, a transverse movement plate, a vertical movement cylinder and a vertical movement plate;

[0021] One side of the lateral moving cylinder is fixedly mounted on the height adjustment block, the other side of the lateral moving cylinder is provided with a lateral moving guide rail, the lateral moving plate is slidably mounted on the lateral moving guide rail, and the output end of the lateral moving cylinder is fixedly connected to the lateral moving plate;

[0022] The other plate surface of the transverse moving plate is fitted and installed with one side surface of the vertical moving cylinder, the other side surface of the vertical moving cylinder is provided with a vertical moving guide rail, the vertical moving plate is slidably installed on the vertical moving guide rail, and the output end of the vertical moving cylinder is fixedly connected with the vertical moving plate;

[0023] The driving assembly is fixedly installed below the vertical movable plate.

[0024] Preferably, the resistance welding structure further includes an oil mist separator, and the oil mist separator is fixedly mounted on a side surface of the support frame; the oil mist separator is electrically connected to the resistance welding body.

[0025] Preferably, the synchronous drive assembly comprises two groups of synchronous drive sub-assemblies, and the two groups of synchronous drive sub-assemblies are vertically opposed and symmetrically arranged;

[0026] The synchronous drive subassembly includes a synchronous moving guide rail, a synchronous moving slider, a synchronous mounting plate, a synchronous fixing plate, a synchronous mounting seat and a synchronous drive motor;

[0027] The synchronous moving guide rails are installed on both sides of the support frame, the synchronous moving sliders are installed on the synchronous moving guide rails, the synchronous moving plate is installed on the two synchronous moving sliders, the synchronous mounting plate is installed on the plate surface of the synchronous moving plate, and the resistance welding machine body is installed on the synchronous mounting plate;

[0028] The synchronous mounting seat is installed above or below the support frame, and the synchronous mounting seat is installed in the middle of the two synchronous moving guide rails. The synchronous drive motor is installed on the synchronous mounting plate, and the output end of the synchronous drive motor passes through the synchronous mounting plate, and the output end of the synchronous drive motor is fixedly connected to the synchronous mounting plate.

[0029] Preferably, a through hole is opened in the middle of the fixing plate, the first fixing seat and the second fixing seat are respectively installed on both sides of the through hole, the through hole is located below the overlap and the welding plate, and the through hole is used for the resistance welding body located at the lower end to pass through.

[0030] One of the above technical solutions has the following beneficial effects: before welding, the assembly of the product to be welded is completed first: the coil body of the transformer is fixed by the first fixing seat, and the connection terminal of the transformer is fixed by the first fixing seat, and the connection terminal of the welding piece and the connection terminal of the lap connection terminal are placed in sequence above the connection terminal of the coil body. After completing the assembly of the transformer, according to the position of the lap joint of the transformer, the position of the two clamping fixtures is adjusted by the adjustment component, and then the two clamping fixtures are driven by the driving component to clamp on both sides of the lap joint and the welding piece to complete the clamping and fixing work of the product to be welded. Finally, the double-sided double-point overcurrent technology is used for welding using the resistance welding structure to avoid the problem of welding piece misalignment, which can ensure the welding quality and improve the overall performance of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a resistance welding device of the utility model;

[0032] Figure 2 It is a side view schematic diagram of a resistance welding device of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a resistance welding structure in a resistance welding device of the utility model;

[0034] Figure 4 It is a front view schematic diagram of a resistance welding structure in a resistance welding device of the utility model;

[0035] Figure 5 It is a structural schematic diagram of a clamping structure in a resistance welding device of the utility model;

[0036] Figure 6 It is a side view schematic diagram of a clamping structure in a resistance welding device of the utility model;

[0037] Figure 7 It is a structural schematic diagram of a fixed structure in a resistance welding device of the utility model;

[0038] In the accompanying drawings: resistance welding structure 1, support frame 11, synchronous drive assembly 12, synchronous moving guide rail 121, synchronous moving slider 122, synchronous mounting plate 123, synchronous fixed plate 124, synchronous mounting seat 125, synchronous drive motor 126, resistance welding body 13, oil mist separator 14, fixed structure 2, fixed plate 21, through hole 210, first fixed seat 22, second fixed seat 23, clamping structure 3, adjustment assembly 31, height adjustment base 311, height adjustment column 312, height adjustment block 313, lateral moving cylinder 314, lateral moving plate 315, vertical moving cylinder 316, vertical moving plate 317, drive assembly 32, adjustment drive motor 321, guide block 322, drive sleeve 323, connecting rod 324, slide groove 325, clamping fixture 33, adjustment slider 331, high temperature resistant elastomer 332, coil body 4, terminal 5, overlap 6. DETAILED DESCRIPTION

[0039] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figure 1-7As shown, a resistance welding device comprises a resistance welding structure 1, a fixing structure 2 and a clamping structure 3 arranged in sequence from front to back;

[0044] The resistance welding structure 1 comprises a support frame 11, a synchronous drive assembly 12 and two groups of resistance welding bodies 13, the two groups of resistance welding bodies 13 are respectively installed at the upper end and the lower end of the support frame 11, and the synchronous drive assembly 12 is used to drive the two resistance welding bodies 13 to move away from or towards each other;

[0045] The fixing structure 2 includes a fixing plate 21, and a first fixing seat 22 and a second fixing seat 23 are installed on the upper plate surface of the fixing plate 21. The first fixing seat 22 is used to fix the coil body 4 of the transformer, and the second fixing seat 23 is used to fix the connection terminal 5 of the transformer. The connection terminal 5 is overlapped above the connection terminal of the coil body 4, and the overlap 6 is provided with a welding piece. The two resistance welding bodies 13 are moved close to each other to weld the overlap 6 and the welding piece.

[0046] The clamping structure 3 includes an adjustment component 31, a drive component 32 and two clamping fixtures 33. The adjustment component 31 is used to adjust the positions of the two clamping fixtures 33. The drive component 32 is used to drive the two clamping fixtures 33 to move away from or towards each other. The movement of the two clamping fixtures 33 towards each other is used to clamp the overlap 6 and both sides of the welding piece.

[0047] like Figure 1-2 As shown, before welding, the assembly of the product to be welded is completed first: the coil body 4 of the transformer is fixed by the first fixing seat 22, and the connection terminal of the transformer is fixed by the first fixing seat 22, and the connection terminal of the welding piece and the connection terminal of the lap connection terminal 5 are placed in sequence above the connection terminal of the coil body 4. After the assembly of the transformer is completed, according to the position of the lap joint 6 of the transformer, the position of the two clamping fixtures 33 is adjusted by the adjustment component 31, and then the two clamping fixtures 33 are driven by the driving component 32 to clamp on both sides of the lap joint 6 and the welding piece to complete the clamping and fixing work of the product to be welded. Finally, the resistance welding structure 1 is used to weld using the double-sided double-point overcurrent technology to avoid the problem of welding piece misalignment, which can ensure the welding quality and improve the overall performance of the transformer.

[0048] To further illustrate, the clamping fixture 33 is an L-shaped piece, and an adjusting slider 331 is protruding from the outer surface of one end of the clamping fixture 33;

[0049] The driving assembly 32 includes an adjustable driving motor 321 and a guide block 322;

[0050] The output end of the adjusting driving motor 321 is sleeved with a driving sleeve 323, and the periphery of the driving sleeve 323 is hinged with two groups of connecting rods 324, and the other ends of the two groups of connecting rods 324 are hinged on the corresponding adjusting sliders 331;

[0051] The guide block 322 is provided with a slide groove 325 adapted to the adjusting slider 331 , and the adjusting slider 331 is slidably mounted on the slide groove 325 .

[0052] like Figure 5-6 As shown, when the output end of the adjusting driving motor 321 drives the driving sleeve 323 to perform telescopic movement, the two sliding blocks slide away from or towards each other along the sliding groove 325 on the guide block 322, and the two clamping fixtures 33 move away from or towards each other.

[0053] To further explain, the other end of the clamping fixture 33 is provided with a pressing surface for pressing the overlapping portion 6, and a high temperature resistant elastomer 332 is also installed on the pressing surface.

[0054] Specifically, the high temperature resistant elastomer 332 is made of materials such as polyurethane.

[0055] The clamping fixture 33 in the utility model is pressed against the overlap 6 by the high temperature resistant elastomer 332 on the pressing surface, which can not only adapt to workpieces with different surface shapes, but also help to avoid damage to the terminal ends of the terminal 5 and the terminal ends of the coil body 4 or deformation of the welding piece due to excessive local pressure. In addition, the use of the high temperature resistant elastomer 332 enables the clamp to work normally in a high temperature environment, thereby ensuring the welding quality.

[0056] To further illustrate, the adjustment assembly 31 includes a height adjustment subassembly and a movement adjustment subassembly;

[0057] The height adjustment subassembly includes a height adjustment base 311, a height adjustment column 312 and a height adjustment block 313;

[0058] The height adjustment column 312 is inserted above the height adjustment base 311 , and the height adjustment block 313 is detachably sleeved on the height adjustment column 312 ;

[0059] The movable adjustment subassembly is fixedly mounted on the height adjustment block 313 .

[0060] To further illustrate, the movement and adjustment subassembly includes a lateral movement cylinder 314, a lateral movement plate 315, a vertical movement cylinder 316 and a vertical movement plate 317;

[0061] One side of the lateral moving cylinder 314 is fixedly mounted on the height adjustment block 313, and the other side of the lateral moving cylinder 314 is provided with a lateral moving guide rail, and the lateral moving plate 315 is slidably mounted on the lateral moving guide rail, and the output end of the lateral moving cylinder 314 is fixedly connected to the lateral moving plate 315;

[0062] The other plate surface of the transverse moving plate 315 is fitted with one side surface of the vertical moving cylinder 316, and the other side surface of the vertical moving cylinder 316 is provided with a vertical moving guide rail, and the vertical moving plate 317 is slidably mounted on the vertical moving guide rail, and the output end of the vertical moving cylinder 316 is fixedly connected to the vertical moving plate 317;

[0063] The driving assembly 32 is fixedly installed below the vertical moving plate 317 .

[0064] like Figure 5-6 As shown, the utility model first adjusts the height of the movable adjustment subassembly through the height adjustment subassembly, thereby adjusting the height of the two clamping fixtures 33; then adjusts the horizontal position of the two clamping fixtures 33 through the movable adjustment subassembly, thereby facilitating the driving assembly 32 to adjust the clamping distance between the two clamping fixtures 33 and the product to be welded, thereby realizing free adjustment of the two clamping fixtures 33 in height and horizontal directions, and has the advantages of a wide range of applications and simple and convenient operation.

[0065] In summary, the clamping structure 3 in the present invention solves the problems of poor clamping versatility, poor clamping stability and poor clamping adjustability when the clamping structure 3 in the traditional technology is used for welding products.

[0066] To further explain, the resistance welding structure 1 further includes an oil mist separator 14 , which is fixedly mounted on a side surface of the support frame 11 ; the oil mist separator 14 is electrically connected to the resistance welding body 13 .

[0067] like Figure 3-4 As shown, in the resistance welding device, the main function of the oil mist separator 14 is to effectively remove the oil mist particles generated during the welding process through the above principle to ensure the cleanliness of the welding environment and the normal operation of the equipment. At the same time, the oil mist separator 14 can also improve the welding quality, reduce the generation of welding defects, and improve production efficiency.

[0068] Further explanation, the synchronous drive assembly 12 includes two sets of synchronous drive sub-assemblies, and the two sets of synchronous drive sub-assemblies are vertically opposed and symmetrically arranged;

[0069] The synchronous drive subassembly includes a synchronous moving guide rail 121, a synchronous moving slider 122, a synchronous mounting plate 123, a synchronous fixing plate 124, a synchronous mounting seat 125 and a synchronous drive motor 126;

[0070] The synchronous moving guide rails 121 are installed on both sides of the support frame 11, the synchronous moving sliders 122 are installed on the synchronous moving guide rails 121, the synchronous moving plates are installed on the two synchronous moving sliders 122, the synchronous moving plates are installed on the plate surface of the synchronous moving plates, and the resistance welding machine body 13 is installed on the synchronous mounting plates 123;

[0071] The synchronous mounting seat 125 is installed above or below the support frame 11, and the synchronous mounting seat 125 is installed in the middle of the two synchronous moving guide rails 121. The synchronous driving motor 126 is installed on the synchronous mounting plate 123, and the output end of the synchronous driving motor 126 passes through the synchronous mounting plate 123, and the output end of the synchronous driving motor 126 is fixedly connected to the synchronous mounting plate 123.

[0072] To further explain, a through hole 210 is opened in the middle of the fixing plate 21, and the first fixing seat 22 and the second fixing seat 23 are respectively installed on both sides of the through hole 210. The through hole 210 is located below the overlap 6 and the welding plate, and the through hole 210 is used for the resistance welding body 13 located at the lower end to pass through.

[0073] like Figure 7 As shown, through the structural design of the synchronous drive assembly 12 and the design of the through hole 210 provided in the fixing plate 21, the resistance welding device can reduce the production cost while ensuring the double-sided double-point overcurrent welding technical effect of the resistance welding structure 1.

[0074] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A resistance welding device, characterized in that: It comprises a resistance welding structure (1), a fixing structure (2) and a clamping structure (3) which are arranged in sequence from front to back; The resistance welding structure (1) comprises a support frame (11), a synchronous drive assembly (12) and two groups of resistance welding bodies (13), wherein the two groups of resistance welding bodies (13) are respectively mounted on the upper end and the lower end of the support frame (11), and the synchronous drive assembly (12) is used to drive the two resistance welding bodies (13) to move away from or towards each other; The fixing structure (2) comprises a fixing plate (21), the upper plate surface of the fixing plate (21) being provided with a first fixing seat (22) and a second fixing seat (23), the first fixing seat (22) being used to fix the coil body (4) of the transformer, the second fixing seat (23) being used to fix the connection terminal (5) of the transformer, the connection end of the connection terminal (5) being overlapped above the connection end of the coil body (4), and a welding piece being provided at the overlap (6), and the two resistance welding bodies (13) being moved closer to each other for welding the overlap (6) and the welding piece; The clamping structure (3) comprises an adjustment component (31), a drive component (32) and two clamping fixtures (33); the adjustment component (31) is used to adjust the positions of the two clamping fixtures (33); the drive component (32) is used to drive the two clamping fixtures (33) to move away from or towards each other; the movement of the two clamping fixtures (33) towards each other is used to clamp the overlap (6) and the two sides of the welding sheet.

2. A resistance welding device according to claim 1, characterized in that: The clamping fixture (33) is an L-shaped piece, and an adjusting slider (331) is protruding from the outer surface of one end of the clamping fixture (33); The driving assembly (32) comprises an adjustable driving motor (321) and a guide block (322); The output end of the adjustment drive motor (321) is sleeved with a drive sleeve (323), and the periphery of the drive sleeve (323) is correspondingly hinged with two groups of connecting rods (324), and the other ends of the two groups of connecting rods (324) are correspondingly hinged on the corresponding adjustment sliders (331); The guide block (322) is provided with a slide groove (325) adapted to the adjusting slider (331), and the adjusting slider (331) is slidably mounted on the slide groove (325).

3. A resistance welding device according to claim 2, characterized in that: The other end of the clamping fixture (33) is provided with a pressing surface for pressing the overlapping portion (6), and a high temperature resistant elastomer (332) is also installed on the pressing surface.

4. A resistance welding device according to claim 1, characterized in that: The adjustment component (31) comprises a height adjustment subcomponent and a movement adjustment subcomponent; The height adjustment subassembly comprises a height adjustment base (311), a height adjustment column (312) and a height adjustment block (313); The height adjustment column (312) is inserted above the height adjustment base (311), and the height adjustment block (313) is detachably sleeved on the height adjustment column (312); The movable adjustment subassembly is fixedly mounted on the height adjustment block (313).

5. A resistance welding device according to claim 4, characterized in that: The moving and adjusting subassembly comprises a transverse moving cylinder (314), a transverse moving plate (315), a vertical moving cylinder (316) and a vertical moving plate (317); One side of the transverse moving cylinder (314) is fixedly mounted on the height adjustment block (313); the other side of the transverse moving cylinder (314) is provided with a transverse moving guide rail; the transverse moving plate (315) is slidably mounted on the transverse moving guide rail; and the output end of the transverse moving cylinder (314) is fixedly connected to the transverse moving plate (315); The other plate surface of the transverse moving plate (315) is fitted and installed with one side surface of the vertical moving cylinder (316); the other side surface of the vertical moving cylinder (316) is provided with a vertical moving guide rail; the vertical moving plate (317) is slidably installed on the vertical moving guide rail; and the output end of the vertical moving cylinder (316) is fixedly connected to the vertical moving plate (317); The driving assembly (32) is fixedly mounted below the vertical movable plate (317).

6. A resistance welding device according to claim 1, characterized in that: The resistance welding structure (1) further comprises an oil mist separator (14), wherein the oil mist separator (14) is fixedly mounted on a side surface of the support frame (11); the oil mist separator (14) is electrically connected to the resistance welding machine body (13).

7. A resistance welding device according to claim 1, characterized in that: The synchronous drive assembly (12) comprises two groups of synchronous drive sub-assemblies, and the two groups of synchronous drive sub-assemblies are arranged opposite to each other and symmetrically. The synchronous drive subassembly comprises a synchronous moving guide rail (121), a synchronous moving slider (122), a synchronous mounting plate (123), a synchronous fixing plate (124), a synchronous mounting seat (125) and a synchronous drive motor (126); The synchronous moving guide rails (121) are mounted on both sides of the support frame (11); the synchronous moving sliders (122) are mounted on the synchronous moving guide rails (121); a synchronous moving plate is mounted on the two synchronous moving sliders (122); the synchronous mounting plate (123) is mounted on the plate surface of the synchronous moving plate; and the resistance welding machine body (13) is mounted on the synchronous mounting plate (123); The synchronous mounting seat (125) is installed above or below the support frame (11), and the synchronous mounting seat (125) is installed in the middle of the two synchronous moving guide rails (121). The synchronous drive motor (126) is installed on the synchronous mounting plate (123), and the output end of the synchronous drive motor (126) passes through the synchronous mounting plate (123), and the output end of the synchronous drive motor (126) is fixedly connected to the synchronous mounting plate (123).

8. A resistance welding device according to claim 1, characterized in that: A through hole (210) is provided in the middle of the fixing plate (21); the first fixing seat (22) and the second fixing seat (23) are respectively mounted on both sides of the through hole (210); the through hole (210) is located below the overlap (6) and the welding sheet; the through hole (210) is used for the resistance welding machine body (13) located at the lower end to pass through.

Images