Multifunctional welding device for production of hydraulic torque converter

Abstract

This invention relates to the field of hydraulic torque converter manufacturing, specifically to a multi-functional welding device for hydraulic torque converter production. The device includes a worktable with columns mounted at each of the four corners above the worktable. Upper fixed seats are mounted on the four sets of columns, and hydraulic cylinders are installed within the upper fixed seats. This invention achieves precise alignment and clamping of the upper and lower housings of the hydraulic torque converter through a linkage-type centering clamping structure. Multiple sets of fixed arms synchronously center and clamp, ensuring housing coaxiality and eliminating assembly deviations. Flexible clamping prevents workpiece scratches and weld loosening, solving the problems of large alignment deviations and insufficient clamping reliability in existing processes. Simultaneously, a stable vacuum welding environment is created through a vacuum-sealed cavity, isolating air and eliminating defects such as weld oxidation and porosity. Combined with a precise transmission structure controlling the welding torch's uniform speed movement, it ensures uniform weld formation, significantly improving weld strength and service reliability, and guaranteeing the safe operation of the entire hydraulic torque converter.

Description

Technical Field

[0001] This invention relates to the field of hydraulic torque converter manufacturing, and more specifically to a multifunctional welding device for hydraulic torque converter production. Background Technology

[0002] The hydraulic torque converter is the core component of the hydraulic automatic transmission. It is a closed rotating pressure assembly with a core structure divided into three main modules, with the outer shell serving as its core base for load bearing and sealing.

[0003] In the invention patent application CN222711315U, published on April 4, 2025, entitled "Anti-collision Welding Device for Hydraulic Torque Converters," this invention discloses an anti-collision welding device for hydraulic torque converters, comprising a positioning plate, a limiting block, and connecting bolts. The positioning plate has a limiting block on it, and the connecting bolts connect the positioning plate and the limiting block. The positioning plate guides the turbine shaft of the hydraulic torque converter and positions it within the inner hole of the pump wheel bushing. The limiting block limits the position of the key of the hydraulic torque converter. The beneficial effects of this invention are: when placing the hydraulic torque converter into the welding device, the turbine shaft is first placed into the positioning plate, and then the pump wheel bushing and the key are placed into the positioning plate and the limiting block. By guiding first and then positioning, the pump wheel bushing and the key at the front end of the bushing are prevented from colliding with the welding fixture. This device is convenient and quick to install and use, improves work efficiency, and ensures the smooth progress of hydraulic torque converter welding.

[0004] In the aforementioned patents or prior art, due to the high-speed rotation and high-pressure load characteristics of the hydraulic torque converter during operation, the shape and position deviation of the upper and lower shells must be strictly controlled during welding. If the deviation is too large, it will directly lead to the failure of the matching accuracy of the internal transmission components, leakage of the shell seal, excessive vibration of the whole machine, and even structural instability and jamming of the whole machine.

[0005] Therefore, it is necessary to invent a multifunctional welding device for the production of hydraulic torque converters to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a multifunctional welding device for the production of hydraulic torque converters. Through the coordinated design of the linkage centering clamping structure and the vacuum circumferential welded automatic welding mechanism, it solves the problems of large misalignment of the upper and lower shells, poor clamping stability, inability to stably guarantee weld strength, and easy occurrence of welding defects in the prior art when welding hydraulic torque converters.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-functional welding device for the production of hydraulic torque converters, comprising a workbench, columns installed at the four corners of the workbench, upper fixed seats installed above the four sets of columns, hydraulic cylinders installed inside the upper fixed seats, and the hydraulic cylinders connected to the hydraulic control system pipelines, movable fixed seats slidably connected between the four sets of columns, and the movable fixed seats are fixedly connected to the output end of the hydraulic cylinders, and a vacuum pump is installed on one side of the workbench; The welding assembly set in the workbench includes a vacuum tank, which is installed on the workbench and connected to a vacuum pump pipeline. A hydraulic lifting rod is installed at the bottom inside the vacuum tank and connected to a hydraulic control system pipeline. A movable plate is rotatably connected to the output end of the hydraulic lifting rod. The drive assembly mounted on the movable plate includes a gear, which is rotatably connected to one side above the movable plate. A toothed ring is installed on the inner wall of the vacuum tank, and the toothed ring meshes with the gear. The fixed sealing assembly located below the movable fixed base includes a connecting base, which is installed below the movable fixed base. A sealing cover is installed below the connecting base and is located above the vacuum tank. A sealing groove is provided below the sealing cover.

[0008] As a preferred embodiment of the present invention, a bearing seat is installed above the output end of the hydraulic lifting rod, a sealing door is installed on one side of the vacuum tank, an outer frame is installed above the movable plate, a servo motor is installed on the outer frame, and the output end of the servo motor is connected to the gear shaft.

[0009] As a preferred embodiment of the present invention, a sliding seat is slidably connected above the outer casing frame, and a transverse electric push rod is installed between the sliding seat and the outer casing frame.

[0010] In a preferred embodiment of the present invention, a lifting electric actuator is installed above the sliding seat, a welding gun is installed above the lifting electric actuator, and a plasma welding machine assembly is installed below the movable plate, wherein the plasma welding machine assembly is connected to the welding gun wiring harness.

[0011] As a preferred embodiment of the present invention, a guide groove is provided on the inner wall of the vacuum tank, and a guide wheel is rotatably connected below the movable plate, and the guide groove and the guide wheel are slidably connected.

[0012] As a preferred embodiment of the present invention, five sets of sliding rods are installed in a ring below the sealing cover. Each set of sliding rods is slidably connected to a fixed arm, and each set of sliding rods is fitted with a spring. The two ends of the spring are respectively attached to the fixed arm and the bottom of the sealing cover.

[0013] As a preferred embodiment of the present invention, each of the fixed arms is rotatably connected to a roller below it, and a sealing ring is installed on the inner wall of the vacuum tank, with the sealing ring and the sealing groove at the same vertical and horizontal position.

[0014] As a preferred embodiment of the present invention, a rotating seat is rotatably connected inside the sealing cover, and an impeller is rotatably connected inside the connecting seat, with the impeller shaft-connected to the rotating seat.

[0015] As a preferred embodiment of the present invention, the inner wall of the connecting seat is provided with five sets of limiting holes arranged in a ring. Each set of limiting holes is slidably connected to a limiting rod. A spring is attached between the limiting rod and the inner wall of the limiting hole, and one end of the limiting rod is attached to the surface of the impeller.

[0016] In a preferred embodiment of the present invention, the rotating seat is rotatably connected to each set of fixed arms by a connecting rod.

[0017] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. Through the linkage-type centering and clamping structure, precise alignment and stable clamping of the upper and lower housings of the hydraulic torque converter can be achieved. Multiple sets of fixed arms achieve synchronous radial movement through the linkage transmission of connecting rods, rotating seats and impellers, automatically completing the centering and clamping of the upper housing, accurately ensuring the coaxiality of the upper and lower housings, and completely eliminating assembly alignment deviations during the welding process. At the same time, through flexible pre-tightening and roller rolling clamping, rigid clamping is avoided from causing scratches on the housing surface and from workpiece loosening and displacement during welding. This greatly improves the accuracy and efficiency of housing clamping and the stability of workpieces during welding, fundamentally solving the pain points of large alignment deviations of the upper and lower housings and insufficient clamping reliability in existing welding processes. 2. By sealing the cap and vacuum tank together, and combining them with a vacuum pump, a stable vacuum working environment can be quickly built in the welding chamber, completely isolating the air from the weld pool. This effectively prevents welding defects such as weld oxidation, porosity, and slag inclusions, fundamentally improving the weld formation quality and structural strength. At the same time, with a constant transmission ratio gear ring transmission structure and guide limiting structure, the circumferential welding speed of the welding torch can be precisely controlled, ensuring uniform weld width and consistent penetration depth. This solves the problem that existing direct welding methods cannot stably guarantee weld strength, significantly improving the long-term service reliability of the weld, and thus ensuring the overall operating performance and safety of the hydraulic torque converter. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sealing door structure of the present invention; Figure 3 This is a schematic diagram of the vacuum cannula planing structure of the present invention; Figure 4 This is a schematic diagram of the outer shell frame structure of the present invention; Figure 5 This is a schematic diagram of the shell frame planing structure of the present invention; Figure 6 This is a schematic diagram of the sealing cap structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the rotating seat and the fixed arm of the present invention; Figure 8 This is a schematic diagram of the planed structure of the sealing cap of the present invention; Figure 9 This is a schematic diagram of the impeller and limiting rod mating structure of the present invention; Figure 10 For the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0020] Explanation of reference numerals in the attached figures: 001. Workbench; 101. Column; 102. Upper Fixed Base; 103. Movable Fixed Base; 104. Hydraulic Cylinder; 105. Vacuum Pump; 002. Welding Assembly; 201. Vacuum Tank; 202. Hydraulic Lifting Rod; 203. Bearing Base; 204. Movable Plate; 205. Outer Frame; 206. Sliding Seat; 207. Lifting Electric Actuator; 208. Welding Torch; 209. Horizontal Electric Actuator; 210. Sealing Door; 211. Plasma Welding Machine Assembly; 003. Drive Moving components; 301, gear; 302, servo motor; 303, gear ring; 304, guide wheel; 305, guide groove; 004, fixed sealing assembly; 401, sealing cover; 402, sealing groove; 403, slide bar; 404, fixed arm; 405, spring one; 406, roller; 407, sealing ring; 408, rotating seat; 409, connecting seat; 410, impeller; 411, limiting hole; 412, limiting rod; 413, spring two; 414, connecting rod. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This invention provides, for example Figure 1-10The multi-functional welding device for producing hydraulic torque converters shown includes a workbench 001, with columns 101 installed at each of the four corners of the workbench 001. An upper fixed seat 102 is installed above the four columns 101, and a hydraulic cylinder 104 is installed inside the upper fixed seat 102. The hydraulic cylinder 104 is connected to the hydraulic control system pipeline. A movable fixed seat 103 is slidably connected between the four columns 101, and the movable fixed seat 103 is fixedly connected to the output end of the hydraulic cylinder 104. A vacuum pump 105 is installed on one side of the workbench 001. The workbench 001 provides a stable mounting base for the entire welding device, and the hydraulic cylinder 104 can drive the movable fixed seat 103 to slide along the columns 101 arranged at the four corners, ensuring the alignment accuracy of mold closing and sealing. The vacuum pump 105 provides a negative pressure power source for the vacuum welding environment of the device, laying the foundation for vacuum environment welding, effectively avoiding weld oxidation and improving welding quality.

[0023] The welding assembly 002 set in the workbench 001 includes a vacuum tank 201. The vacuum tank 201 is installed on the workbench 001 and is connected to the vacuum pump 105 pipe. A hydraulic lifting rod 202 is installed at the bottom inside the vacuum tank 201 and is connected to the hydraulic control system pipe. A movable plate 204 is rotatably connected to the output end of the hydraulic lifting rod 202. The vacuum tank 201 provides a sealed working chamber for welding the hydraulic torque converter housing. With the help of the vacuum pump 105, the air inside the chamber can be quickly extracted to form a stable vacuum welding environment. This prevents defects such as oxidation and porosity caused by the high-temperature molten pool coming into contact with air during the welding process, greatly improving the weld formation quality and structural strength. In addition, the hydraulic lifting rod 202 can drive the movable plate 204 to adjust the height.

[0024] The drive assembly 003 set on the movable plate 204 includes a gear 301, which is rotatably connected to the upper side of the movable plate 204. A gear ring 303 is installed on the inner wall of the vacuum tank 201, and the gear ring 303 meshes with the gear 301. The gear 301 meshes with the gear ring 303 fixed on the inner wall of the vacuum tank 201 to provide stable and precise power transmission for the circumferential rotation of the movable plate 204. The transmission ratio is constant, which can precisely control the rotation speed and rotation angle of the movable plate 204, ensuring that the walking speed of the welding torch 208 is uniform during circumferential welding, avoiding problems such as uneven width and inconsistent penetration depth of the weld, and improving welding accuracy and weld formation quality.

[0025] The fixed sealing assembly 004 located below the movable fixed base 103 includes a connecting base 409. The connecting base 409 is installed below the movable fixed base 103. A sealing cover 401 is installed below the connecting base 409 and is located above the vacuum tank 201. A sealing groove 402 is provided below the sealing cover 401.

[0026] The sealing cover 401 and the movable fixed seat 103 are stably connected by the connecting seat 409, ensuring that the sealing cover 401 rises and falls synchronously with the movable fixed seat 103. The sealing groove 402 opened below the sealing cover 401 can work with the sealing ring 407 to achieve precise surface sealing, greatly improving the sealing performance of the vacuum tank 201 cavity and ensuring the stability of the vacuum degree inside the cavity.

[0027] Furthermore, in the above structure, a bearing seat 203 is installed above the output end of the hydraulic lifting rod 202, a sealing door 210 is installed on one side of the vacuum tank 201, an outer frame 205 is installed above the movable plate 204, a servo motor 302 is installed on the outer frame 205, and the output end of the servo motor 302 is shaft-connected to the gear 301.

[0028] The protrusion on the upper part of the support seat 203 and its insertion into the lower housing ensure the stability of the housing during the welding process and prevent displacement deviation during welding. The sealing door 210 facilitates the loading and unloading of workpieces to be welded by the operator. Furthermore, the servo motor 302 provides high-precision driving power for the rotation of the gear 301, which can accurately control the rotation speed and start / stop position, further improving the control accuracy of the circumferential rotation of the movable plate 204 and adapting to the speed requirements of different welding processes.

[0029] Furthermore, in the above structure, a sliding seat 206 is slidably connected above the outer casing frame 205, and a transverse electric actuator 209 is installed between the sliding seat 206 and the outer casing frame 205.

[0030] The horizontal electric actuator 209 can precisely drive the sliding seat 206 to complete the reciprocating adjustment in the horizontal direction, thereby precisely adjusting the horizontal welding position of the welding torch 208.

[0031] Furthermore, in the above structure, a lifting electric push rod 207 is installed above the sliding seat 206, a welding torch 208 is installed above the lifting electric push rod 207, and a plasma welding machine assembly 211 is installed below the movable plate 204, and the plasma welding machine assembly 211 is connected to the welding torch 208 wiring harness.

[0032] The lifting electric actuator 207 can precisely drive the welding torch 208 to complete the vertical height adjustment, accurately control the position of the welding torch 208 and the weld to be welded, and ensure the quality of the weld bead formation.

[0033] Furthermore, in the above structure, a guide groove 305 is provided on the inner wall of the vacuum tank 201, and a guide wheel 304 is rotatably connected below the movable plate 204, and the guide groove 305 and the guide wheel 304 are slidably connected.

[0034] By cooperating with the guide groove 305 on the inner wall of the vacuum tank 201, the guide wheel 304 provides precise radial limiting and rolling guidance for the circumferential rotation of the movable plate 204, ensuring the stability of the movable plate 204 during rotation.

[0035] Furthermore, in the above structure, five sets of slide rods 403 are installed in a ring below the sealing cover 401. Each set of slide rods 403 is slidably connected to a fixed arm 404. Each set of slide rods 403 is fitted with a spring 405, and the two ends of the spring 405 are respectively attached to the fixed arm 404 and the bottom of the sealing cover 401.

[0036] The slide bar 403 provides precise radial sliding guidance for the fixed arm 404, and the spring 405 provides adaptive elastic preload for the fixed arm 404. Through the curvature of the upper housing surface, the bottom of the fixed arm 404 can achieve flexible buffering during the downward movement of the fixed arm 404, avoiding scratches on the housing surface caused by rigid clamping. At the same time, it can be adapted to the clamping of housings with different inner diameter specifications, improving the versatility of the device.

[0037] Furthermore, in the above structure, each set of fixed arms 404 is rotatably connected to a roller 406 below it, and a sealing ring 407 is installed on the inner wall of the vacuum tank 201, with the sealing ring 407 and the sealing groove 402 at the same vertical and horizontal position.

[0038] The roller 406 below the fixed arm 404 can form rolling contact with the surface of the upper housing when the housing is clamped, which not only ensures the stability of the clamping and positioning, but also avoids scratching damage to the surface of the housing during the clamping process. At the same time, the sealing ring 407 and the sealing groove 402 of the sealing cover 401 are precisely aligned and matched, forming a compression seal when the sealing cover 401 is pressed down to close the mold.

[0039] Furthermore, in the above structure, a rotating seat 408 is rotatably connected inside the sealing cover 401, and an impeller 410 is rotatably connected inside the connecting seat 409, with the impeller 410 axially connected to the rotating seat 408.

[0040] The rotating seat 408 can rotate circumferentially within the sealing cover 401, providing a transmission basis for the clamping action of the fixed arm 404; the impeller 410 is coaxially connected to the rotating seat 408, and the rotation of the rotating seat 408 can drive the impeller 410 to rotate synchronously, realizing centralized drive of the clamping mechanism, ensuring the synchronicity of the actions of multiple fixed arms 404, and improving the coaxiality and clamping efficiency of the housing clamping.

[0041] Furthermore, in the above structure, the inner wall of the connecting seat 409 is provided with five sets of limiting holes 411 arranged in a ring. Each set of limiting holes 411 is slidably connected with a limiting rod 412. A spring 413 is attached between the limiting rod 412 and the inner wall of the limiting hole 411, and one end of the limiting rod 412 is attached to the surface of the impeller 410.

[0042] The limiting hole 411 provides precise sliding limit guidance for the limiting rod 412, ensuring the displacement accuracy of the limiting rod 412. Under the elastic preload of the spring 413, the limiting rod 412 continuously contacts the surface of the impeller 410. When the impeller 410 rotates, the limiting rod 412 will contact the protrusion, providing rotational damping. After the fixed arm 404 completes the clamping of the housing, the position of the impeller 410 can be locked, while ensuring the consistency of the force applied by the fixed arm 404, ensuring the stability of the housing clamping and the welding alignment accuracy.

[0043] Furthermore, in the above structure, the rotating seat 408 is rotatably connected to each set of fixed arms 404 by a connecting rod 414.

[0044] When the roller 406 below the fixed arm 404 contacts the surface of the upper housing via the connecting rod 414, the fixed arm 404 will slide along the slide rod 403, and the connecting rod 414 will drive the rotating seat 408 to rotate, so that the rotating seat 408 can drive the impeller 410 to rotate.

[0045] like Figure 1-10 As shown, in the initial state of operation, first open the sealing door 210 on the side wall of the vacuum tank 201, insert the lower housing of the hydraulic torque converter to be welded onto the support 203, and position it by inserting it into the support 203 through the protruding structure of the support 203, thus limiting the horizontal displacement of the lower housing; then precisely align and fasten the upper housing of the hydraulic torque converter to the mold surface of the lower housing to complete the pre-assembly of the upper and lower housings, and then close the sealing door 210 to complete the workpiece layout before welding.

[0046] At this time, start the hydraulic control system supporting the hydraulic cylinder 104, control the output end of the hydraulic cylinder 104 to extend downward, and drive the movable fixing seat 103 to slide smoothly downward along the vertical columns 101 arranged at the four corners. Meanwhile, drive the sealing cover 401 to move downward synchronously through the connecting seat 409. During the downward movement of the sealing cover 401, the rollers 406 under the fixed arms 404 first contact the arc-shaped outer surface of the upper shell. As the sealing cover 401 continues to move downward, the rollers 406 roll along the surface of the upper shell, pushing multiple groups of fixed arms 404 to slide radially synchronously along the corresponding sliding rods 403. The fixed arms 404 drive the rotating seat 408 to complete circumferential rotation within the sealing cover 401 through the articulated connecting rods 414. The rotating seat 408 synchronously drives the impeller 410 coaxially connected to it to rotate. During the rotation of the impeller 410, the limiting rod 412 always keeps in contact with the surface of the impeller 410 under the elastic pre-tightening force of the second spring 413. When the sealing cover 401 moves downward to the preset clamping station, multiple groups of fixed arms 404 complete the radial centering and clamping of the upper shell. At this time, the limiting rod 412 fits with the protrusions of the impeller 410, providing rotational damping for the impeller 410, enabling each group of fixed arms 404 to fix the upper shell with a constant clamping force, while ensuring the coaxiality of the upper and lower shells, and completely eliminating the welding assembly deviation.

[0047] Meanwhile, the sealing groove 402 under the sealing cover 401 is accurately aligned and fitted with the sealing ring 407 on the inner wall of the vacuum tank 201 to form an extrusion surface seal, completing the airtight sealing of the welding cavity of the vacuum tank 201. Subsequently, start the vacuum pump 105 on the side of the workbench 001. The vacuum pump 105 quickly extracts the air inside the cavity of the vacuum tank 201, creating a stable negative pressure vacuum environment inside the cavity, preventing welding defects such as oxidation and pores caused by the contact between the high-temperature molten pool and air during the welding process, and providing an environmental basis for high-quality welding operations.

[0048] At this time, the horizontal electric actuator 209 is activated, driving the sliding seat 206 to slide horizontally back and forth along the outer shell frame 205, precisely adjusting the radial position of the welding torch 208 so that the nozzle of the welding torch 208 is precisely aligned with the mold closing ring seam of the upper and lower shells; the lifting electric actuator 207 is activated, driving the welding torch 208 to complete the vertical lifting adjustment, precisely controlling the vertical distance between the nozzle of the welding torch 208 and the weld seam, ensuring controllable welding penetration; simultaneously, the servo motor 302 and the plasma welding machine assembly 211 are activated: the servo motor 302 drives the gear 301 to rotate, and the gear 301 meshes with the gear ring 303 fixed on the inner wall of the vacuum tank 201, thereby driving the movable plate 204 to rotate around the hydraulic lifting rod 202. The output end rotates smoothly in a circumferential direction. During the rotation of the movable plate 204, the guide wheel 304 below it rolls and limits the movement along the guide groove 305 on the inner wall of the vacuum tank 201, eliminating radial wobble and vibration during the rotation process, and ensuring that the welding torch 208 travels at a uniform and constant circumferential speed. The plasma welding machine assembly 211 provides a stable welding power source and process parameter control for the welding torch 208. As the welding torch 208 travels circumferentially with the movable plate 204, it completes the continuous welding of the circumferential seam of the upper and lower shells. The constant travel speed ensures that the weld bead width is uniform and the penetration depth is consistent. The vacuum welding environment eliminates weld oxidation and porosity defects, greatly improving the weld formation quality and structural strength.

[0049] Finally, after all components are reset, open the sealing door 210 of the vacuum tank 201, remove the welded hydraulic torque converter housing from the support 203, and complete the entire welding process. You can then directly enter the welding cycle of the next workpiece.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multifunctional welding device for producing hydraulic torque converters, comprising a workbench (001), characterized in that: The workbench (001) is equipped with four columns (101) at the top corners. The four columns (101) are equipped with upper fixed seats (102). The upper fixed seats (102) are equipped with hydraulic cylinders (104) and the hydraulic cylinders (104) are connected to the hydraulic control system pipeline. The four columns (101) are slidably connected with movable fixed seats (103), and the movable fixed seats (103) are fixedly connected to the output end of the hydraulic cylinders (104). A vacuum pump (105) is installed on one side of the workbench (001). The welding assembly (002) set in the workbench (001) includes a vacuum tank (201), which is installed on the workbench (001) and is connected to a vacuum pump (105) pipe. A hydraulic lifting rod (202) is installed at the bottom inside the vacuum tank (201) and is connected to a hydraulic control system pipe. A movable plate (204) is rotatably connected to the output end of the hydraulic lifting rod (202). The drive assembly (003) disposed on the movable plate (204) includes a gear (301), which is rotatably connected to one side above the movable plate (204). A gear ring (303) is installed on the inner wall of the vacuum tank (201), and the gear ring (303) meshes with the gear (301). The fixed sealing assembly (004) located below the movable fixed seat (103) includes a connecting seat (409), which is installed below the movable fixed seat (103). A sealing cover (401) is installed below the connecting seat (409), and the sealing cover (401) is located above the vacuum tank (201). A sealing groove (402) is provided below the sealing cover (401).

2. The multifunctional welding device for producing hydraulic torque converters according to claim 1, characterized in that: A bearing seat (203) is installed above the output end of the hydraulic lifting rod (202), a sealing door (210) is installed on one side of the vacuum tank (201), an outer frame (205) is installed above the movable plate (204), a servo motor (302) is installed on the outer frame (205), and the output end of the servo motor (302) is shaft-connected to the gear (301).

3. The multifunctional welding device for producing hydraulic torque converters according to claim 2, characterized in that: A sliding seat (206) is slidably connected above the outer casing frame (205), and a transverse electric push rod (209) is installed between the sliding seat (206) and the outer casing frame (205).

4. The multifunctional welding device for producing hydraulic torque converters according to claim 3, characterized in that: A lifting electric push rod (207) is installed above the sliding seat (206), a welding gun (208) is installed above the lifting electric push rod (207), a plasma welding machine assembly (211) is installed below the movable plate (204), and the plasma welding machine assembly (211) is connected to the welding gun (208) wiring harness.

5. The multifunctional welding device for producing hydraulic torque converters according to claim 1, characterized in that: The vacuum tank (201) has a guide groove (305) on its inner wall, and a guide wheel (304) is rotatably connected below the movable plate (204), and the guide groove (305) and the guide wheel (304) are slidably connected.

6. The multifunctional welding device for producing hydraulic torque converters according to claim 1, characterized in that: Five sets of sliding rods (403) are installed in a ring below the sealing cover (401). Each set of sliding rods (403) is slidably connected to a fixed arm (404). Each set of sliding rods (403) is fitted with a spring (405), and the two ends of the spring (405) are respectively attached to the fixed arm (404) and the bottom of the sealing cover (401).

7. A multifunctional welding device for producing hydraulic torque converters according to claim 6, characterized in that: Each fixed arm (404) is rotatably connected to a roller (406), and a sealing ring (407) is installed on the inner wall of the vacuum tank (201), with the sealing ring (407) and the sealing groove (402) at the same vertical and horizontal position.

8. A multifunctional welding device for producing hydraulic torque converters according to claim 7, characterized in that: The sealing cover (401) is rotatably connected to a rotating seat (408), and the connecting seat (409) is rotatably connected to an impeller (410), and the impeller (410) is axially connected to the rotating seat (408).

9. A multifunctional welding device for producing hydraulic torque converters according to claim 8, characterized in that: The inner wall of the connecting seat (409) is provided with five sets of limiting holes (411) arranged in a ring. Each set of limiting holes (411) is connected to a limiting rod (412) for limiting and sliding. A spring (413) is attached between the limiting rod (412) and the inner wall of the limiting hole (411), and one end of the limiting rod (412) is attached to the surface of the impeller (410).

10. A multifunctional welding device for producing hydraulic torque converters according to claim 8, characterized in that: The rotating seat (408) is rotatably connected to each set of fixed arms (404) by a connecting rod (414).

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