Welding device for full-automatic electric automobile part production

Abstract

The invention discloses a full-automatic welding device for electric automobile part production, which belongs to the technical field of part welding and comprises an outer shell and a jacking mechanism for laterally positioning an upper cover and a lower cover to be welded and jacking the upper cover and the lower cover. A conveying mechanism used for conveying the upper cover and the lower shell and a welding mechanism used for conducting plasma welding on the upper cover and the lower shell are arranged in the outer shell. According to the automatic welding device, the complete cycle of conveying feeding, conveying stopping and workpiece jacking to the welding position, workpiece descending and resetting and conveying discharging is completed in sequence, manual intervention is not needed in the whole process, and the production efficiency is improved; two mechanisms are driven at the same time through rotation of the oval rotating disc, on one hand, the jacking plate is driven to ascend and descend through the oval groove in the oval rotating disc, a workpiece is jacked from the bottom, initial positioning is achieved through the butt joint block, and on the other hand, the side push rod is pushed through the oval outer contour of the oval rotating disc, then the side positioning module is driven to move towards the center of the workpiece, and accurate positioning is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding technology for parts, and in particular to a fully automated welding apparatus for the production of electric vehicle parts. Background Technology

[0002] The rapid development of electric vehicles has placed higher demands on the production efficiency, processing precision, and consistency of key components. Among these, housing components, such as battery pack casings and controller housings, typically consist of an upper cover and a lower shell, which require reliable sealing and connection through welding. Plasma welding, due to its advantages of concentrated energy, minimal deformation, and high-quality welds, has been widely used in the production of these components.

[0003] Currently, the welding production of electric vehicle parts commonly employs the following methods: manual or semi-automatic welding, relying on operators for loading, unloading, positioning, clamping, and welding. This method is labor-intensive, inefficient, and the welding quality is greatly affected by the worker's skill and condition, making it difficult to guarantee product consistency and failing to meet the needs of mass production. Automated special-purpose machine welding, with some production lines using automated equipment with conveying mechanisms and simple fixtures, often suffers from deficiencies in the positioning and clamping process: firstly, the positioning of the workpiece before welding is often not precise enough, especially lacking coordinated constraints on the relative positions of the two components, which can easily lead to… Weld misalignment is a concern. Furthermore, conventional fixtures may interfere with the welding torch path, requiring either complex avoidance mechanisms or the loosening of the fixture during welding. Both of these issues can affect the stability of the workpiece during welding, thus impacting welding quality. Many devices rely on independent drive sources for conveying, lifting, positioning, clamping, and welding, resulting in less smooth workflow, longer cycle times, and room for improvement in overall automation and efficiency. Simultaneously, achieving a unified drive system that allows for orderly switching between conveying and lifting / clamping actions to simplify the structure, reduce costs, and improve reliability is a problem that needs to be addressed in actual production.

[0004] In summary, existing electric vehicle component welding devices still have room for improvement in terms of fully automated operation, high-precision workpiece positioning and stable clamping, and coordination and efficient connection of various processes. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a fully automatic welding device capable of automatic feeding, precise positioning, reliable clamping, high-quality welding, and automatic unloading. The technical solution adopted by this invention is as follows: a fully automatic welding device for the production of electric vehicle parts, comprising an outer shell and a lifting mechanism for side positioning of the upper and lower shells to be welded and for lifting the upper and lower shells. The outer shell is provided with a conveying mechanism for conveying the upper and lower shells and a welding mechanism for performing plasma welding on the upper and lower shells. The lifting mechanism includes an elliptical turntable rotatably mounted inside the outer shell. The outer contour of the elliptical turntable is elliptical, and a gear is fixedly mounted at the bottom of the elliptical turntable. Two side fixing modules are provided inside the outer shell.

[0006] Furthermore, the lifting mechanism also includes a horizontal guide rod fixedly installed inside the outer shell. Two inner and outer slides are slidably installed on the horizontal guide rod. Multiple lifting rods are rotatably installed on the inner and outer slides. A lifting plate is rotatably installed on the lifting rods. A docking block that aligns with the shape of the bottom of the lower shell is provided on the top of the lifting plate.

[0007] Furthermore, the lifting mechanism also includes a lower guide post fixedly installed below the inner and outer slides. An elliptical groove is provided on the upper surface of the elliptical turntable. The lower guide post slides in the elliptical groove. When the lifting plate does not lift the upper cover and the lower shell, the lower guide post is located at the end of the major axis of the elliptical groove.

[0008] Furthermore, the lifting mechanism also includes two side push rods slidably mounted on the outer shell. An outer moving block is fixedly mounted on the side push rod. A return spring is provided between the outer moving block and the outer shell. A lower rotating sleeve is rotatably mounted on the outer moving block. An inner sliding rod is slidably mounted inside the lower rotating sleeve. A side guide post is provided on the lower rotating sleeve. Two side extension rods are fixedly mounted on the side of the outer shell. A vertical sliding groove is provided on the side extension rod. The side guide post slides in the vertical sliding groove. When the lifting plate is not lifted, the side push rod is located outside the short axis endpoint of the elliptical turntable.

[0009] Furthermore, the side positioning module includes an upper slider that is slidably installed inside the outer shell. The upper slider is rotatably installed with an inner slider. An upper positioning frame is rotatably installed on the upper slider. A wheel axle is rotatably installed on each side of the upper positioning frame. An upper top wheel and a lower top wheel are rotatably installed on the wheel axle.

[0010] Furthermore, the side positioning module also includes two locking blocks slidably mounted on the upper positioning frame. The bottom of the locking blocks is provided with two inclined surfaces. A locking block spring is provided between the locking blocks and the upper positioning frame. The upper slider is provided with a docking groove that matches the locking blocks.

[0011] When the conveyor belt transports the lower shell, with the top cover placed on it, to the top of the lifting plate, the mating block at the top of the lifting plate has not yet contacted the bottom of the lower shell. At this time, the gear and the elliptical turntable begin to rotate. The rotation of the elliptical turntable drives the lower guide post and the inner and outer carriages to move inward along the horizontal guide rod through the elliptical groove. The inner and outer carriages drive the lifting plate to rise through the lifting rod. First, the mating block at the top of the lifting plate aligns with the shape of the bottom of the lower shell to achieve the initial positioning of the lower shell. Then, the lifting plate continues to rise, driving the lower shell and the top cover to rise, so that the bottom of the lower shell separates from the conveyor belt. When the short axis end of the elliptical groove reaches the lower guide post, the lifting plate pushes the lower shell and the top cover to the highest point. At this time, the plasma welding gun is located on both sides of the weld seam to be welded on the top cover and the lower shell.

[0012] As the elliptical turntable rotates, when its outer contour contacts the side push rod, the turntable pushes the side push rod and the outer moving block outward, stretching the return spring. The side push rod drives the lower rotating sleeve to rotate, and the side guide post slides and rotates within the vertical sliding groove. The inner sliding rod slides along the lower rotating sleeve, and the inner sliding rod drives the upper sliding block to slide inward, causing the upper top wheel on the side away from the welding frame to fit against the side of the upper cover. At this time, the lower top wheel on that side fits against the side of the lower shell. The upper and lower top wheels position and clamp the upper cover and lower shell. When the end point of the major axis of the elliptical turntable contacts the side push rod, the sides of the upper cover and lower shell are clamped, and the elliptical turntable and gear stop rotating.

[0013] Furthermore, the conveying mechanism includes an inner support fixedly installed inside the outer casing, a drive motor fixedly installed on the inner support, a lower half gear and an upper half gear fixedly installed on the motor shaft of the drive motor, an inner mating wheel rotatably installed inside the outer casing, and an inner transmission belt wrapped around the inner mating wheel and the gear.

[0014] Furthermore, the conveying mechanism also includes a worm gear rotatably mounted inside the housing, a worm gear fixedly mounted at the bottom of the worm gear, a worm wheel rotatably mounted on the inner support, a worm gear fixedly mounted on the worm wheel, the worm wheel meshing with the worm gear, when the worm gear meshes with the upper half gear, the lower half gear disengages from the inner mating wheel, when the worm gear disengages from the upper half gear, the lower half gear meshes with the inner mating wheel.

[0015] Furthermore, the conveying mechanism also includes multiple drive rollers rotatably mounted inside the housing. Conveyor wheels are fixedly mounted at both ends of the drive rollers, and a conveyor belt is wound around the conveyor wheels. Multiple side limiting plates are provided on the outside of the conveyor belt, and an upper transmission belt is wound around the worm gear and the drive roller near the worm gear.

[0016] The drive motor drives the lower and upper gears to rotate. When the upper gear meshes with the worm gear, it drives the worm gear and worm to rotate. The worm drives the worm wheel and worm gear to rotate. The worm gear drives the drive roller and conveyor wheel to rotate through the upper transmission belt, thus driving the conveyor belt to move. When the lower gear meshes with the inner docking wheel, it drives the inner docking wheel to rotate. The inner docking wheel drives the gear and elliptical turntable to rotate through the inner transmission belt.

[0017] The conveyor belt is equipped with a positioning line. The lower shell with the upper cover is placed on the conveyor belt. The lower shell is initially limited by the side limiting plate. After the conveyor belt transports the upper cover and the lower shell to the top plate, the upper half gear disengages from the worm gear, and the lower half gear begins to mesh with the inner mating wheel. At this time, the lower half gear and the drive motor begin to rotate.

[0018] Furthermore, the welding mechanism includes a welding frame slidably mounted on the top inner side of the outer casing. Two plasma welding guns are fixedly mounted on the welding frame, and the plasma welding guns can contact the lower top wheel. A welding motor is fixedly mounted on the top of the outer casing. A motor gear and a drive wheel are fixedly mounted on the motor shaft of the welding motor. A driven gear is rotatably mounted on the outer casing. A passive wheel is fixedly mounted on the driven gear. The motor gear meshes with the driven gear. Multiple driven wheels and outer wheels are rotatably mounted on the top inner side of the outer casing. A top transmission belt is wound around the drive wheel and driven wheels. A top driven belt is wound around the passive wheel and outer wheels. The welding frame is fixedly mounted to the top driven belt and the top transmission belt.

[0019] When the upper cover and lower shell reach between the two plasma welding torches, the welding motor drives the motor gear and drive wheel to rotate. The motor gear drives the driven gear and driven wheel to rotate. The drive wheel and driven wheel drive the top transmission belt and top driven belt to move respectively. The top transmission belt and top driven belt drive the welding frame to slide along the top of the outer shell. Plasma welding is performed on the joint between the upper cover and lower shell through the plasma welding torch. When the plasma welding torch contacts the lower top wheel, the plasma welding torch pushes the upper positioning frame to rotate relative to the upper slider, causing the original insertion into the docking slot to move upward. The locking block spring is stretched. When the other locking block reaches the docking... Above the slot, the spring of the tensioned locking block rebounds, allowing the locking block to insert into the docking slot. At this point, the lower top wheel, which originally blocked the movement of the plasma welding torch, no longer obstructs its movement. Simultaneously, the other lower top wheel and the upper top wheel contact the lower shell and the upper cover, respectively, ensuring that the upper cover and the lower shell remain in a positioning and clamping state during the welding process. When the next welding is performed, the welding frame and the plasma welding torch move back. When the plasma welding torch contacts the lower top wheel, it drives the upper positioning frame to rotate again. This process repeats, allowing the upper and lower top wheels to make way for the plasma welding torch without affecting the positioning and clamping stability of the upper cover and the lower shell.

[0020] When the upper gear meshes with the worm gear, the conveyor belt carries the upper cover and lower shell to above the lifting plate. Then, the lower gear meshes with the inner mating wheel. At this time, the lifting plate carries the upper cover and lower shell to the top. Then, the upper gear meshes with the worm gear, and the conveyor belt runs one empty stroke. At this time, the plasma welding gun performs plasma welding on the upper cover and lower shell. Then, the lower gear meshes with the inner mating wheel, and the lifting plate descends to put the welded upper cover and lower shell back onto the conveyor belt. Then, the upper gear meshes with the worm gear, and the conveyor belt sends the welded upper cover and lower shell out, and so on.

[0021] The beneficial effects of this invention compared with the prior art are: (1) This invention realizes the automatic, orderly, and cyclic switching of the three major processes of conveying, lifting, positioning, clamping and welding. The drive motor can complete the complete cycle of conveying and feeding, stopping the conveying and lifting the workpiece to the welding position, maintaining the lifting state for welding, lowering the workpiece and resetting, and conveying and unloading in sequence. The whole process does not require manual intervention, the actions are closely connected, the rhythm is fixed, the production efficiency is improved, and the consistency and high quality of the products are guaranteed; (2) This invention uses the rotation of the elliptical turntable to drive two sets of mechanisms at the same time. One is to drive the lifting plate to rise and fall through the elliptical groove on it to lift the workpiece from the bottom and use the docking block to achieve initial positioning. The other is to push the side push rod through its elliptical outer contour, thereby driving the side positioning module to move towards the center of the workpiece. This makes the upper cover and lower cover more efficient. During the process of being lifted off the conveyor belt, the shell is simultaneously constrained from the bottom and both sides, achieving precise positioning; (3) The upper positioning frame in the side positioning module of the present invention can rotate relative to the upper slider, and achieve the switching of two stable states through the cooperation of the locking block and the docking slot. When the lower top wheel on the plasma welding gun travel path is obstructed, the welding gun contacts the wheel and pushes the upper positioning frame to rotate, causing the current locking block to come out. The module as a whole rotates slightly to make way for the welding gun path. At the same time, the locking block on the other side quickly locks into the corresponding docking slot under the action of the locking block spring, so that another set of upper and lower top wheels immediately take over and continue to maintain the clamping force on the workpiece, so that the welding gun does not need to stop or the fixture does not need to be completely released. While welding continuously, it ensures that the workpiece is always in a stable and reliable clamping state throughout the welding process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention (internal).

[0024] Figure 3 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 1 .

[0025] Figure 4 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 2 .

[0026] Figure 5 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 3 .

[0027] Figure 6 This is a schematic diagram of the side-fixing module structure of the present invention. Figure 1 .

[0028] Figure 7 This is a schematic diagram of the side-fixing module structure of the present invention. Figure 2 .

[0029] Figure 8 This is a schematic diagram of the slider structure of the present invention.

[0030] Figure 9 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 1 .

[0031] Figure 10 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 2 .

[0032] Figure 11 This is a schematic diagram of the welding mechanism structure of the present invention. Figure 1 .

[0033] Figure 12 This is a schematic diagram of the welding mechanism structure of the present invention. Figure 2 .

[0034] Reference numerals: 101-Outer shell; 102-Oval turntable; 103-Gear; 104-Inner and outer slides; 105-Lower guide post; 106-Lifting rod; 107-Push plate; 108-Oval groove; 109-Horizontal guide rod; 110-Side push rod; 111-Outer moving block; 112-Reset spring; 113-Lower rotating sleeve; 114-Inner slide rod; 115-Upper slider; 116-Upper positioning frame; 117-Upper top wheel; 118-Lower top wheel; 119-Axle; 120-Snap-in block; 121-Snap-in spring; 122-Matching slot; 123-Side extension rod; 124-Vertical slide groove; 125-Side guide post; 201-Inner support; 202 - Drive motor; 203- Lower half gear; 204- Upper half gear; 205- Inner mating wheel; 206- Inner transmission belt; 207- Worm gear; 208- Worm; 209- Worm wheel; 210- Worm wheel gear; 211- Upper transmission belt; 212- Drive roller; 213- Conveyor wheel; 214- Conveyor belt; 215- Side limiting plate; 301- Welding frame; 302- Plasma welding torch; 303- Welding motor; 304- Motor gear; 305- Driving wheel; 306- Driven wheel; 307- Top transmission belt; 308- Driven gear; 309- Passive wheel; 310- Outer wheel; 311- Top driven belt; 4- Top cover; 5- Lower shell. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0036] Example: Reference Figures 1-12 A fully automatic welding device for producing electric vehicle parts includes an outer shell 101 and a lifting mechanism for side positioning of the upper cover 4 and lower shell 5 to be welded and for lifting the upper cover 4 and lower shell 5. The outer shell 101 is provided with a conveying mechanism for conveying the upper cover 4 and lower shell 5 and a welding mechanism for plasma welding the upper cover 4 and lower shell 5. The lifting mechanism includes an elliptical turntable 102 rotatably installed inside the outer casing 101. The outer contour of the elliptical turntable 102 is elliptical. A gear 103 is fixedly installed at the bottom of the elliptical turntable 102. Two side fixing modules are provided inside the outer casing 101.

[0037] like Figures 3-8 As shown, the lifting mechanism also includes a horizontal guide rod 109 fixedly installed inside the outer shell 101. Two inner and outer slides 104 are slidably installed on the horizontal guide rod 109. Multiple lifting rods 106 are rotatably installed on the inner and outer slides 104. A lifting plate 107 is rotatably installed on the lifting rods 106. A docking block is provided on the top of the lifting plate 107 to mate with the bottom shape of the lower shell 5.

[0038] like Figures 3-8 As shown, the lifting mechanism also includes a lower guide post 105 fixedly installed below the inner and outer slides 104. An elliptical groove 108 is provided on the upper surface of the elliptical turntable 102. The lower guide post 105 slides in the elliptical groove 108. When the lifting plate 107 does not lift the upper cover 4 and the lower shell 5, the lower guide post 105 is located at the end of the long axis of the elliptical groove 108.

[0039] like Figures 3-8 As shown, the lifting mechanism also includes two side push rods 110 slidably mounted on the outer shell 101. An outer moving block 111 is fixedly mounted on the side push rod 110. A return spring 112 is provided between the outer moving block 111 and the outer shell 101. A lower rotating sleeve 113 is rotatably mounted on the outer moving block 111. An inner sliding rod 114 is slidably mounted inside the lower rotating sleeve 113. A side guide post 125 is provided on the lower rotating sleeve 113. Two side extension rods 123 are fixedly mounted on the side of the outer shell 101. A vertical sliding groove 124 is provided on the side extension rod 123. The side guide post 125 slides in the vertical sliding groove 124. When the lifting plate 107 is not lifted, the side push rod 110 is located outside the short axis end point of the elliptical turntable 102.

[0040] like Figures 3-8 As shown, the side positioning module includes an upper slider 115 that is slidably installed inside the outer casing 101. The upper slider 115 is rotatably installed with the inner slider 114. An upper positioning frame 116 is rotatably installed on the upper slider 115. A wheel axle 119 is rotatably installed on each side of the upper positioning frame 116. An upper top wheel 117 and a lower top wheel 118 are rotatably installed on the wheel axle 119.

[0041] like Figures 3-8 As shown, the side positioning module also includes two locking blocks 120 that are slidably mounted on the upper positioning frame 116. The bottom of the locking block 120 is provided with two inclined surfaces. A locking block spring 121 is provided between the locking block 120 and the upper positioning frame 116. The upper slider 115 is provided with a docking groove 122 that matches the locking block 120.

[0042] When the conveyor belt 214 transports the lower shell 5, on which the upper cover 4 is placed, to above the lifting plate 107, the mating block at the top of the lifting plate 107 has not yet contacted the bottom of the lower shell 5. At this time, the gear 103 and the elliptical turntable 102 begin to rotate. The rotation of the elliptical turntable 102 drives the lower guide column 105 and the inner and outer slides 104 to move inward along the horizontal guide rod 109 through the elliptical groove 108. The inner and outer slides 104 drive the lifting plate 107 to rise through the lifting rod 106. First, the lifting plate... The top of the lifting plate 107 aligns with the shape of the bottom of the lower shell 5 to achieve initial positioning of the lower shell 5. Then, the lifting plate 107 continues to rise, driving the lower shell 5 and the upper cover 4 to rise, causing the bottom of the lower shell 5 to detach from the conveyor belt 214. When the short axis end of the elliptical groove 108 reaches the lower guide post 105, the lifting plate 107 pushes the lower shell 5 and the upper cover 4 to the highest point. At this time, the plasma welding gun 302 is located on both sides of the weld seam to be welded on the upper cover 4 and the lower shell 5.

[0043] As the elliptical turntable 102 rotates, when the outer contour of the elliptical turntable 102 contacts the side push rod 110, the elliptical turntable 102 pushes the side push rod 110 and the outer moving block 111 to move outward. The return spring 112 is stretched, and the side push rod 110 drives the lower rotating sleeve 113 to rotate. The side guide post 125 slides and rotates in the vertical sliding groove 124. The inner sliding rod 114 slides along the lower rotating sleeve 113 and drives the upper sliding block 115 to slide inward, so that the upper top wheel 117 on the side away from the welding frame 301 is in contact with the side of the upper cover 4. At this time, the lower top wheel 118 on the same side is in contact with the side of the lower shell 5. The upper cover 4 and the lower shell 5 are positioned and clamped by the upper top wheel 117 and the lower top wheel 118. When the end point of the long axis of the elliptical turntable 102 contacts the side push rod 110, the side of the upper cover 4 and the lower shell 5 is clamped. At this time, the elliptical turntable 102 and the gear 103 stop rotating.

[0044] like Figure 9 , Figure 10 As shown, the conveying mechanism includes an inner support 201 fixedly installed inside the outer casing 101, a drive motor 202 fixedly installed on the inner support 201, a lower half gear 203 and an upper half gear 204 fixedly installed on the motor shaft of the drive motor 202, an inner mating wheel 205 rotatably installed inside the outer casing 101, and an inner transmission belt 206 wrapped around the inner mating wheel 205 and the gear 103.

[0045] like Figure 9 , Figure 10As shown, the conveying mechanism also includes a worm 208 rotatably mounted inside the outer casing 101. A worm gear 207 is fixedly mounted at the bottom of the worm 208. A worm wheel 209 is rotatably mounted on the inner support 201. A worm gear 210 is fixedly mounted on the worm wheel 209. The worm wheel 209 meshes with the worm 208. When the worm gear 207 meshes with the upper half gear 204, the lower half gear 203 disengages from the inner mating wheel 205. When the worm gear 207 disengages from the upper half gear 204, the lower half gear 203 meshes with the inner mating wheel 205.

[0046] like Figure 9 , Figure 10 As shown, the conveying mechanism also includes multiple drive rollers 212 rotatably installed inside the outer casing 101. Conveyor wheels 213 are fixedly installed at both ends of the drive rollers 212. A conveyor belt 214 is wound around the conveyor wheels 213. Multiple side limiting plates 215 are provided on the outer side of the conveyor belt 214. An upper transmission belt 211 is wound around the worm gear 210 and the drive rollers 212 near the worm gear 209.

[0047] The drive motor 202 drives the lower half gear 203 and the upper half gear 204 to rotate. When the upper half gear 204 meshes with the worm gear 207, the upper half gear 204 drives the worm gear 207 and the worm 208 to rotate. The worm 208 drives the worm wheel 209 and the worm gear 210 to rotate. The worm gear 210 drives the drive roller 212 and the conveyor wheel 213 to rotate through the upper transmission belt 211. The conveyor wheel 213 drives the conveyor belt 214 to move. When the lower half gear 203 meshes with the inner docking wheel 205, the lower half gear 203 drives the inner docking wheel 205 to rotate. The inner docking wheel 205 drives the gear 103 and the elliptical turntable 102 to rotate through the inner transmission belt 206.

[0048] The conveyor belt 214 is equipped with a placement positioning line. The lower shell 5, on which the upper cover 4 is placed, is placed on the conveyor belt 214. The lower shell 5 is initially limited by the side limiting plate 215. After the conveyor belt 214 transports the upper cover 4 and the lower shell 5 to the top plate 107, the upper half gear 204 disengages from the worm gear 207, and the lower half gear 203 begins to mesh with the inner mating wheel 205. At this time, the lower half gear 203 begins to rotate.

[0049] like Figure 6 , Figure 11 , Figure 12As shown, the welding mechanism includes a welding frame 301 slidably mounted on the top inner side of the outer casing 101. Two plasma welding guns 302 are fixedly mounted on the welding frame 301. The plasma welding guns 302 can contact the lower top wheel 118. A welding motor 303 is fixedly mounted on the top of the outer casing 101. A motor gear 304 and a drive wheel 305 are fixedly mounted on the motor shaft of the welding motor 303. A driven gear 308 is rotatably mounted on the outer casing 101. A passive wheel 309 is fixedly mounted on the driven gear 308. The motor gear 304 meshes with the driven gear 308. Multiple driven wheels 306 and outer wheels 310 are rotatably mounted on the top inner side of the outer casing 101. A top drive belt 307 is wound around the drive wheel 305 and the driven wheel 306. A top driven belt 311 is wound around the passive wheel 309 and the outer wheel 310. The welding frame 301 is fixedly mounted with the top driven belt 311 and the top drive belt 307.

[0050] When the upper cover 4 and the lower shell 5 reach between the two plasma welding torches 302, the welding motor 303 drives the motor gear 304 and the driving wheel 305 to rotate. The motor gear 304 drives the driven gear 308 and the driven wheel 309 to rotate. The driving wheel 305 and the driven wheel 309 respectively drive the top transmission belt 307 and the top driven belt 311 to move. The top transmission belt 307 and the top driven belt 311 drive the welding frame 301 to slide along the top of the outer shell 101, passing through the plasma welding torch 302. 02. Plasma welding is performed at the joint between the upper cover 4 and the lower shell 5. When the plasma welding gun 302 contacts the lower top wheel 118, the plasma welding gun 302 will push the upper positioning frame 116 to rotate relative to the upper slider 115. This causes the locking block 120, which was originally inserted into the docking slot 122, to move upward when its inclined surface is pushed. The locking block spring 121 is stretched. When the other locking block 120 moves, the other locking block 120 contacts the top of the upper slider 115, causing its locking spring 121 to be stretched. When the other locking block 120 reaches above the docking slot 122, the locking block spring 121 of the other locking block 120, which is in a stretched state, rebounds, causing the locking block 120 to insert into the docking slot 122. At this time, the lower top wheel 118, which originally blocked the movement of the plasma welding torch 302, no longer blocks the movement of the plasma welding torch 302. At the same time, the other lower top wheel 118 and the upper top wheel... 117 contacts the lower shell 5 and the upper cover 4 respectively, ensuring that the upper cover 4 and the lower shell 5 remain in a positioning and clamping state during the welding process. When the next welding is performed, the welding frame 301 and the plasma welding gun 302 move back. When the plasma welding gun 302 contacts the lower top wheel 118, it drives the upper positioning frame 116 to rotate again. This process is repeated to achieve the goal of the upper top wheel 117 and the lower top wheel 118 giving way to the plasma welding gun 302 without affecting the positioning and clamping stability of the upper cover 4 and the lower shell 5.

[0051] When the upper gear 204 meshes with the worm gear 207, the conveyor belt 214 drives the upper cover 4 and the lower shell 5 to the top of the lifting plate 107. Then, the lower gear 203 meshes with the inner docking wheel 205. At this time, the lifting plate 107 drives the upper cover 4 and the lower shell 5 to the top. Then, the upper gear 204 meshes with the worm gear 207, and the conveyor belt 214 runs one empty stroke. At this time, the plasma welding gun 302 performs plasma welding on the upper cover 4 and the lower shell 5. Then, the lower gear 203 meshes with the inner docking wheel 205, and the lifting plate 107 descends to put the welded upper cover 4 and the lower shell 5 back onto the conveyor belt 214. Then, the upper gear 204 meshes with the worm gear 207, and the conveyor belt 214 sends the welded upper cover 4 and the lower shell 5 out, and so on.

[0052] Working principle: The drive motor 202 drives the lower half gear 203 and the upper half gear 204 to rotate. When the upper half gear 204 meshes with the worm gear 207, the upper half gear 204 drives the worm gear 207 and the worm 208 to rotate. The worm 208 drives the worm wheel 209 and the worm wheel gear 210 to rotate. The worm wheel gear 210 drives the drive roller 212 and the conveyor wheel 213 to rotate through the upper transmission belt 211, which in turn drives the conveyor belt 214 to move. When the lower half gear 203 meshes with the inner docking wheel 205, the lower half gear 203 drives the inner docking wheel 205 to rotate. The inner docking wheel 205 drives the gear 103 and the elliptical turntable 102 to rotate through the inner transmission belt 206. The conveyor belt 214 is equipped with a placement positioning line. The lower shell 5, on which the upper cover 4 is placed, is placed on the conveyor belt 214. The lower shell 5 is initially limited by the side limiting plate 215. After the conveyor belt 214 transports the upper cover 4 and the lower shell 5 to the top plate 107, the upper half gear 204 disengages from the worm gear 207, and the lower half gear 203 begins to mesh with the inner mating wheel 205. At this time, the lower half gear 203 begins to rotate.

[0053] At this time, the mating block at the top of the lifting plate 107 has not yet contacted the bottom of the lower shell 5. At this time, the gear 103 and the elliptical turntable 102 start to rotate. The elliptical turntable 102 rotates and drives the lower guide post 105 and the inner and outer slides 104 to move inward along the horizontal guide rod 109 through the elliptical groove 108. The inner and outer slides 104 drive the lifting plate 107 to rise through the lifting rod 106. First, the mating block at the top of the lifting plate 107 aligns with the shape of the bottom of the lower shell 5 to achieve the initial positioning of the lower shell 5. Then, the lifting plate 107 continues to rise, driving the lower shell 5 and the upper cover 4 to rise, so that the bottom of the lower shell 5 is separated from the conveyor belt 214. When the short axis end of the elliptical groove 108 reaches the lower guide post 105, the lifting plate 107 pushes the lower shell 5 and the upper cover 4 to the highest point. At this time, the plasma welding gun 302 is located on both sides of the weld to be welded on the upper cover 4 and the lower shell 5.

[0054] As the elliptical turntable 102 rotates, when the outer contour of the elliptical turntable 102 contacts the side push rod 110, the elliptical turntable 102 pushes the side push rod 110 and the outer moving block 111 to move outward. The return spring 112 is stretched, and the side push rod 110 drives the lower rotating sleeve 113 to rotate. The side guide post 125 slides and rotates in the vertical sliding groove 124. The inner sliding rod 114 slides along the lower rotating sleeve 113 and drives the upper sliding block 115 to slide inward, so that the upper top wheel 117 on the side away from the welding frame 301 is in contact with the side of the upper cover 4. At this time, the lower top wheel 118 on the same side is in contact with the side of the lower shell 5. The upper cover 4 and the lower shell 5 are positioned and clamped by the upper top wheel 117 and the lower top wheel 118. When the end point of the long axis of the elliptical turntable 102 contacts the side push rod 110, the side of the upper cover 4 and the lower shell 5 is clamped. At this time, the elliptical turntable 102 and the gear 103 stop rotating.

[0055] When the upper cover 4 and lower shell 5 reach between the two plasma welding torches 302, the welding motor 303 drives the motor gear 304 and the drive wheel 305 to rotate. The motor gear 304 drives the driven gear 308 and the driven wheel 309 to rotate. The drive wheel 305 and the driven wheel 309 drive the top transmission belt 307 and the top driven belt 311 to move respectively. The top transmission belt 307 and the top driven belt 311 drive the welding frame 301 to slide along the top of the outer shell 101. Plasma welding is performed on the joint between the upper cover 4 and the lower shell 5 by the plasma welding torch 302. When the plasma welding torch 302 contacts the lower top wheel 118, the plasma welding torch 302 will push the upper positioning frame 116 to rotate relative to the upper slider 115, causing the original insertion into the docking slot 122 to move upward. The locking spring 121 is stretched. When the other locking... When the insert block 120 reaches above the docking slot 122, the tensioned locking spring 121 rebounds, causing the insert block 120 to be inserted into the docking slot 122. At this time, the lower top wheel 118, which originally blocked the movement of the plasma welding torch 302, no longer blocks the movement of the plasma welding torch 302. At the same time, the other lower top wheel 118 and the upper top wheel 117 contact the lower shell 5 and the upper cover 4 respectively, ensuring that the upper cover 4 and the lower shell 5 always maintain a positioning and clamping state during the welding process. When the next welding is performed, the welding frame 301 and the plasma welding torch 302 move back. When the plasma welding torch 302 contacts the lower top wheel 118, it drives the upper positioning frame 116 to rotate again. This process is repeated to achieve the goal of the upper top wheel 117 and the lower top wheel 118 giving way to the plasma welding torch 302 without affecting the positioning and clamping stability of the upper cover 4 and the lower shell 5.

[0056] When the upper gear 204 meshes with the worm gear 207, the conveyor belt 214 drives the upper cover 4 and the lower shell 5 to the top of the lifting plate 107. Then, the lower gear 203 meshes with the inner docking wheel 205. At this time, the lifting plate 107 drives the upper cover 4 and the lower shell 5 to the top. Then, the upper gear 204 meshes with the worm gear 207, and the conveyor belt 214 runs one empty stroke. At this time, the plasma welding gun 302 performs plasma welding on the upper cover 4 and the lower shell 5. Then, the lower gear 203 meshes with the inner docking wheel 205, and the lifting plate 107 descends to put the welded upper cover 4 and the lower shell 5 back onto the conveyor belt 214. Then, the upper gear 204 meshes with the worm gear 207, and the conveyor belt 214 sends the welded upper cover 4 and the lower shell 5 out, and so on.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A fully automated welding device for producing electric vehicle parts, comprising an outer shell (101) and a lifting mechanism for laterally positioning and lifting the upper cover (4) and lower shell (5) to be welded, characterized in that: The outer shell (101) is provided with a conveying mechanism for conveying the upper cover (4) and the lower shell (5) and a welding mechanism for plasma welding the upper cover (4) and the lower shell (5); The lifting mechanism includes an elliptical turntable (102) rotatably installed inside the outer shell (101), a gear (103) is fixedly installed at the bottom of the elliptical turntable (102), and two side fixing modules are provided inside the outer shell (101).

2. The welding device for fully automated electric vehicle parts production according to claim 1, characterized in that: The lifting mechanism also includes a horizontal guide rod (109) fixedly installed inside the outer shell (101). Two inner and outer slides (104) are slidably installed on the horizontal guide rod (109). Multiple lifting rods (106) are rotatably installed on the inner and outer slides (104). A lifting plate (107) is rotatably installed on the lifting rods (106).

3. The welding device for fully automated electric vehicle parts production according to claim 2, characterized in that: The lifting mechanism also includes a lower guide post (105) fixedly installed below the inner and outer slides (104). The upper surface of the elliptical turntable (102) is provided with an elliptical groove (108). The lower guide post (105) slides in the elliptical groove (108). When the lifting plate (107) does not lift the upper cover (4) and the lower shell (5), the lower guide post (105) is located at the end of the long axis of the elliptical groove (108).

4. The welding device for fully automated electric vehicle parts production according to claim 3, characterized in that: The lifting mechanism also includes two side push rods (110) slidably mounted on the outer shell (101). An outer moving block (111) is fixedly mounted on the side push rod (110). A return spring (112) is provided between the outer moving block (111) and the outer shell (101). A lower rotating sleeve (113) is rotatably mounted on the outer moving block (111). An inner sliding rod (114) is slidably mounted inside the lower rotating sleeve (113). A side guide post (125) is provided on the lower rotating sleeve (113). Two side extension rods (123) are fixedly mounted on the side of the outer shell (101). A vertical sliding groove (124) is provided on the side extension rod (123). The side guide post (125) slides in the vertical sliding groove (124). When the lifting plate (107) is not lifted, the side push rod (110) is located outside the short axis end point of the elliptical turntable (102).

5. The welding device for fully automated electric vehicle parts production according to claim 4, characterized in that: The side positioning module includes an upper slider (115) slidably installed inside the outer shell (101). The upper slider (115) is rotatably installed with the inner slider (114). An upper positioning frame (116) is rotatably installed on the upper slider (115). A wheel axle (119) is rotatably installed on each side of the upper positioning frame (116). An upper top wheel (117) and a lower top wheel (118) are rotatably installed on the wheel axle (119).

6. The welding device for fully automated electric vehicle parts production according to claim 5, characterized in that: The side positioning module also includes two locking blocks (120) slidably mounted on the upper positioning frame (116). The bottom of the locking block (120) is provided with two inclined surfaces. A locking block spring (121) is provided between the locking block (120) and the upper positioning frame (116). The upper slider (115) is provided with a docking slot (122) that matches the locking block (120).

7. The welding device for fully automated electric vehicle parts production according to claim 1, characterized in that: The conveying mechanism includes an inner bracket (201) fixedly installed inside the outer shell (101), a drive motor (202) fixedly installed on the inner bracket (201), a lower half gear (203) and an upper half gear (204) fixedly installed on the motor shaft of the drive motor (202), and an inner docking wheel (205) rotatably installed inside the outer shell (101), the inner docking wheel (205) being connected to the gear (103).

8. The welding device for fully automated production of electric vehicle parts according to claim 7, characterized in that: The conveying mechanism further includes a worm (208) rotatably mounted inside the outer casing (101), a worm gear (207) fixedly mounted at the bottom of the worm (208), a worm wheel (209) rotatably mounted on the inner support (201), a worm gear (210) fixedly mounted on the worm wheel (209), the worm wheel (209) meshing with the worm (208), when the worm gear (207) meshes with the upper half gear (204), the lower half gear (203) disengages from the inner mating wheel (205), when the worm gear (207) disengages from the upper half gear (204), the lower half gear (203) meshes with the inner mating wheel (205).

9. The welding device for fully automated production of electric vehicle parts according to claim 8, characterized in that: The conveying mechanism also includes a plurality of drive rollers (212) rotatably mounted inside the outer casing (101). Conveyor wheels (213) are fixedly mounted at both ends of the drive rollers (212). A conveyor belt (214) is wound around the conveyor wheels (213). A plurality of side limiting plates (215) are provided on the outer side of the conveyor belt (214). The worm gear (210) is connected to the drive rollers (212) near the worm gear (209).

10. The welding device for fully automated production of electric vehicle parts according to claim 1, characterized in that: The welding mechanism includes a welding frame (301) slidably mounted on the top inner side of the outer casing (101). Two plasma welding torches (302) are fixedly mounted on the welding frame (301). The plasma welding torches (302) can contact the lower top wheel (118). A welding motor (303) is fixedly mounted on the top of the outer casing (101). A motor gear (304) and a drive wheel (305) are fixedly mounted on the motor shaft of the welding motor (303). A driven gear (308) is rotatably mounted on the outer casing (101). 8) A driven wheel (309) is fixedly installed on the upper part. The motor gear (304) meshes with the driven gear (308). Multiple driven wheels (306) and outer wheels (310) are rotatably installed on the top inner side of the outer shell (101). A top transmission belt (307) is wrapped around the driving wheel (305) and the driven wheel (306). A top driven belt (311) is wrapped around the driven wheel (309) and the outer wheel (310). The welding frame (301) is fixedly installed with the top driven belt (311) and the top transmission belt (307).

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