A multi-point full-automatic welding device for a seat bucket of an electric tricycle

Abstract

The application discloses a kind of electric tricycle seat bucket multi-point full-automatic welding device.Electric tricycle seat bucket multi-point full-automatic welding device, comprising: the rack of support device, the rack is equipped with the bending part for bending thin steel plate to form electric tricycle seat bucket, the bending part side is equipped with adjusting part for adjusting the space position of preliminary bending seat bucket, and welding part for welding is installed at the butt joint of seat bucket opposite;The rack includes a base, the base is equipped with slide rail, the slide rail upper end is slidably installed with slide plate, the slide plate is symmetrically provided with two groups, and the base is further equipped with driving assembly, and the driving assembly drives two groups of slide plates respectively equidistant, reverse movement.The electric tricycle seat bucket multi-point full-automatic welding device provided by the application can extrude and correct the upper and lower end flanges of the thin steel plate by setting the upper and lower leveling frames, so as to eliminate the end face misplacement problem caused by the unpositioning of both ends of the thin steel plate during bending.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle manufacturing technology, and in particular to a multi-point fully automatic welding device for the seat bucket of an electric tricycle. Background Technology

[0002] The seat bucket of an electric tricycle is the structural support part of the driver's seat on the electric tricycle. It is rectangular or cylindrical, and the upper end is usually hinged to install the seat cushion for the driver to sit on. The sides of the seat bucket are welded with handrails for protection. The inside is a hollow structure to store the battery and can also be used as a storage box.

[0003] Existing technology discloses a coaxial series positioning welding fixture for the seat bucket slide sleeve of an electric tricycle, disclosure number CN223476746U. It includes a base plate and three fixing mechanisms mounted on the base plate: a left support frame fixing mechanism, a right support frame fixing mechanism, a left slide sleeve assembly fixing mechanism, and a right slide sleeve assembly fixing mechanism. The left and right slide sleeve assemblies are fixed to the same base plate using a three-cylinder series positioning configuration. The second cylinder drives the second and third positioning pins to move simultaneously, ensuring the coaxiality of the sleeve assemblies while saving space. A guide block is used to ensure the coaxiality of the sleeve assemblies and guide the positioning pins, effectively improving the stability of product quality. The positioning pins and guide blocks are close to the sleeve assemblies, avoiding the problem in the original fixture where the distance was too great, causing the positioning pins to warp when the sleeve deformed during welding. Furthermore, during unloading, the sleeves will not move with the positioning pins, preventing deformation of the welded parts.

[0004] In the existing technology described above, when bending and forming the seat bucket of a tricycle, the thin steel plate used to make the seat bucket of the electric tricycle is not limited at both ends during the bending process, which causes the two ends of the electric tricycle seat bucket to be misaligned after bending. The electric tricycle seat bucket needs to be removed from the bending equipment and then placed on the positioning device for welding, which involves many processes and reduces production efficiency.

[0005] Therefore, it is necessary to provide a fully automatic multi-point welding device for the seat bucket of an electric tricycle to solve the above-mentioned technical problems. Summary of the Invention

[0006] In order to overcome the defects of the prior art, the present invention provides a multi-point fully automatic welding device for electric tricycle seat buckets, which can perform positioning welding on the end of the electric tricycle seat bucket, achieving the effect of integrated bending and welding.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The electric tricycle seat bucket multi-point fully automatic welding device includes: a frame of a support device, on which a bending part for bending thin steel plates to form an electric tricycle seat bucket is installed, an adjustment part for adjusting the initial bending position of the seat bucket is installed on one side of the bending part, and a welding part for welding is installed directly opposite the seat bucket joint. The frame includes a base, on which a slide rail is mounted, and a slide plate is slidably mounted on the upper end of the slide rail. Two sets of slide plates are symmetrically arranged. A drive assembly is also mounted on the base, which drives the two sets of slide plates to move equidistantly and in opposite directions. Two sets of bending sections are symmetrically arranged. Both sets of bending sections include a base plate. A rotating plate is rotatably mounted on the upper end of the base plate. A vertical first bending column is installed at the rotatable connection between the rotating plate and the base plate. The first bending column is rotatably mounted at the rotation axis of the rotating plate, and the axis of the first bending column is collinear with the rotation axis of the rotating plate. A bending frame is slidably mounted on the rotating plate along its axial direction. A second hydraulic cylinder is mounted on the bending frame. The adjustment part includes a model frame, the outer contour of which is the same as the seat bucket to be bent and formed. A leveling frame is installed at the upper and lower ends of the model frame, and the leveling frame moves closer to and away from the model frame in a straight line with equal distance and opposite direction. The welding section includes a welding frame, and the welding torch is vertically and detachably mounted on the welding frame. The leveling frame at the top and bottom of the model frame contacts the flanges at the top and bottom of the thin steel plate.

[0008] Preferably, the drive assembly includes a first lead screw rotatably mounted on a base, one end of the first lead screw being connected to a first motor, the first motor being fixedly mounted on the base, the output shaft of the first motor being fixedly connected to the first lead screw, the first lead screw being threadedly connected to the lower ends of two slide plates respectively, and the first lead screw being a bidirectional lead screw with opposite thread directions at its two ends.

[0009] Preferably, a second motor and a support rod are fixedly installed on the inner side of the model frame. The two ends of the support rod are respectively fixed to the inner side of the model frame. A vertical pole is fixedly installed at the lower end of the support rod, and the lower end of the pole is fixedly connected to the structural frame.

[0010] Preferably, the second motor has two output ends, and a second lead screw is fixedly installed on each output end. The second motor and the second lead screw are both located in the vertical direction. A threaded seat is sleeved on the end of the second lead screw away from the second motor. The threaded seat is threadedly connected to the second lead screw. The threaded seat is fixedly installed on the leveling frame. Multiple vertical sliding rods are fixedly installed on the end face of the leveling frame near the model frame. Through holes of corresponding size are opened on the end face of the model frame at positions corresponding to the sliding rods. The sliding rods pass through the through holes and slide within them.

[0011] Preferably, the upper and lower ends of the model frame are respectively provided with limiting grooves. Correspondingly, the end faces of the two leveling frames near the model frame are provided with protrusions that are adapted to the limiting grooves. When the leveling frames move up and down, the protrusions can be embedded in the limiting grooves.

[0012] Preferably, the interior of the leveling frame is hollow, and ports are respectively opened in the middle part of the leveling frame and the model frame near the welding part. Magnetic heads are slidably installed at the ports of the leveling frame. The magnetic heads can be adsorbed onto the side wall of the bent thin steel plate to temporarily fix its end. The magnetic heads can move along the axial direction of the leveling frame.

[0013] Preferably, a tripod is fixedly installed on the upper end of the structural frame. The middle part of the thin steel plate is inserted into the gap between the tripod and the model frame in the initial state. The two ends of the thin steel plate are inserted into the gap between the first bending column, the second bending column, and the bending frame. The first hydraulic cylinder drives the pull rod to rotate the rotating plate and the bending frame on it, and performs a first 90° bend on the thin steel plate at the first bending point. The sliding plate drives the bending part to approach the middle of the thin steel plate and performs another 90° bend on the thin steel plate in the same direction at the second bending point to form the prototype of the cylinder seat.

[0014] Preferably, a second hydraulic cylinder is fixedly installed at the lower end of the rotating plate. The second hydraulic cylinder can push the bending frame and the second bending column rotatably installed on the bending frame to move towards the first bending column, so as to clamp or release the thin steel plate placed on the rotating plate.

[0015] Preferably, a vertical mounting strip is fixedly installed on the upper end of the welding frame. The mounting strip has multiple equidistant vertically arranged mounting holes. A fixing bolt is threaded on the side wall of the mounting strip at the position corresponding to the mounting hole. The welding gun is fixed in the mounting hole by the fixing bolt. The inside of the structural frame is hollow. The horizontal section of the welding frame is inserted into the structural frame and moves along the axis of the structural frame under the drive of a third lead screw that is rotatably installed in the structural frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses two leveling frames to compress and correct the upper and lower flanges of the thin steel plate, thereby eliminating the end face misalignment problem caused by the lack of limit at both ends during the bending process of the thin steel plate; (2) The present invention installs a magnetic head at the end of the leveling frame and allows the magnetic head to extend and retract along the axial direction of the leveling frame. After the thin steel plate is bent and formed, the magnetic head is energized and adsorbed onto the side walls at both ends of the thin steel plate and moves outwards in sync, applying a uniform pushing force to the gap so that the gap fits tightly. (3) The present invention achieves two-fold bending of thin steel plate through bending part, and then achieves flange correction and end tension positioning through adjustment part. Finally, the welding part directly welds the butt joint after positioning. The workpiece does not need to be disassembled and transferred from the equipment during the whole process, realizing integrated continuous operation of bending, positioning and welding. Attached Figure Description

[0017] Figure 1 A schematic diagram of the installation structure of the multi-point fully automatic welding device for the electric tricycle seat bucket provided by the present invention; Figure 2 A schematic diagram of the multi-point fully automatic welding device for the seat bucket of an electric tricycle provided by the present invention; Figure 3 A top view of the multi-point fully automatic welding device for the seat bucket of an electric tricycle provided by the present invention; Figure 4 The structural diagram of the frame, bending part and welding part of the multi-point fully automatic welding device for the electric tricycle seat bucket provided by the present invention; Figure 5 A bottom view of the multi-point fully automatic welding device for the electric tricycle seat bucket provided by the present invention; Figure 6 A schematic diagram of the adjustment part and welding part of the multi-point fully automatic welding device for the seat bucket of an electric tricycle provided by the present invention; Figure 7 This is a schematic diagram of the adjustment section of the multi-point fully automatic welding device for the seat bucket of an electric tricycle provided by the present invention.

[0018] The corresponding names of the reference numerals in the attached drawings are as follows: 10, frame; 11, base; 111, slide rail; 12, first motor; 121, first lead screw; 13, slide plate; 131, slider; 14, structural frame; 141, tripod; 20, bending section; 21, base plate; 22, rotating plate; 23, first bending column; 24, bending frame; 241, second bending column; 25, first hydraulic cylinder; 251, pull rod; 26, second hydraulic cylinder; 30, adjusting section; 31, model frame; 311, limiting groove; 32, leveling frame; 321, slide rod; 33, magnetic head; 34, second motor; 341, second lead screw; 35, support rod; 351, upright; 40, welding section; 41, welding frame; 411, mounting strip; 412, mounting hole; 42, fixing bolt; 43, third lead screw; 431, third motor. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0020] There are several ways to manufacture the seat bucket of an electric tricycle, mainly divided into two types. One type involves welding a rectangular frame and then welding thin steel plates inside the frame to form a sealed structure. Since the seat bucket has four sides, the thin steel plates on each side need to be welded in sequence, and the seams of the thin steel plates at the corners need to be treated, which is relatively labor-intensive. The other type uses a single long strip of thin steel plate, which is stamped or bent into one piece. This way, only the seams at both ends of the long strip of thin steel plate need to be welded to form the bucket, and the overall integrity is better.

[0021] Example 1: like Figure 1 As shown, the electric tricycle seat bucket multi-point fully automatic welding device provided by the present invention includes a frame 10 supporting the entire device, a bending part 20 for bending thin steel plates twice, an adjustment part 30 for adjusting the spatial position of the initially bent seat bucket, and a welding part 40 for welding the seat bucket joint.

[0022] Specifically, such as Figure 1-3 As shown, the frame 10 includes a horizontally placed base 11. The base 11 is a rectangular frame structure and can be made of welded I-beams. The lower end is placed on a stable support surface such as the ground or a production support. Two parallel slide rails 111 extending horizontally are fixedly installed on the upper end of the base 11. A slide plate 13 is slidably installed on the upper end of the slide rails 111. A slide block is fixedly installed on the lower end of the slide plate 13. The slide block is adapted to the slide rails 111 and can slide on its upper end. There are two sets of slide plates 13, and the two sets of slide plates 13 are symmetrically arranged on the left and right sides of the base 11.

[0023] Each slide plate 13 has a slider 131 fixedly installed at the bottom center, which is adapted to the first lead screw 121. The rotation of the first lead screw 121 can push the slider 131 and the slide plate 13 fixedly installed on the slider 131 to move along the slide rail 111.

[0024] The drive assembly includes a first motor 12 and a first lead screw 121. The first motor 12 is fixedly mounted on the side wall of the base 11 by bolts. The first lead screw 121 is rotatably mounted inside the base 11 by bearings. The bearings are fixedly mounted in the bearing seats at both ends of the base 11. The first lead screw 121 is horizontally arranged and parallel to the slide rail 111. One end of the first lead screw 121 is fixedly connected to the output shaft of the first motor 12 by a coupling, so that it is driven to rotate by the first motor 12. The first lead screw 121 is a bidirectional lead screw, that is, its body is provided with threaded sections with the same pitch but opposite directions from the middle to both ends. There is a smooth, threadless interval between the two threaded sections. The sliders 131 at the lower ends of the two slide plates 13 are respectively sleeved around the first lead screw 121 and threadedly connected to the first lead screw 121. When the first motor 12 drives the first lead screw 121 to rotate, due to the opposite directions of the threads, the two slide plates 13 will move synchronously along the slide rail 111 at equal distances and in opposite directions under the drive of the first lead screw 121, that is, they will move closer to each other or further away from each other.

[0025] It should be noted that the first lead screw 121 and its connecting parts mentioned above are lead screw mechanisms, which are common driving devices. The driving methods of the leveling frame 32 and the welding frame 41 in the following text are both lead screw mechanisms. Therefore, only the key parts are described. The working principles of the rest are the same. Those skilled in the art have a relatively clear understanding of its components, so they will not be described in detail.

[0026] The frame 10 also includes a structural frame 14 fixedly installed in the middle of the base 11. The structural frame 14 is a vertically arranged frame structure, and its bottom is welded and fixedly installed on the upper end of the base 11. The structural frame 14 is generally U-shaped, including two vertical columns and a crossbeam connecting the tops of the two columns. The interior of the structural frame 14 forms a hollow cavity. The structural frame 14 is used to support some components of the adjustment part 30 and the moving parts of the welding part 40. A tripod 141 is also fixedly installed at one end of the structural frame 14. The tripod 141 is a right-angled triangular plate structure. The right-angled side in the vertical direction is used to abut against the thin steel plate, thereby supporting and positioning the middle of the thin steel plate and preventing the thin steel plate from shifting during bending.

[0027] like Figure 1 , Figure 4-5 As shown, two sets of bending parts 20 are also symmetrically arranged, which are respectively installed on the two slide plates 13 to bend the thin steel plate from both ends at the same time. The structures of the two sets of bending parts 20 are exactly the same. The following describes the structure of one set.

[0028] Each bending section 20 includes a horizontally positioned base plate 21. The base plate 21 is a rectangular metal plate, and its bottom is fixedly mounted on the upper end of the slide plate 13 by bolts, moving together with the slide plate 13. A rotating plate 22 is rotatably mounted on the upper end of the base plate 21 via a vertical rotating shaft. The rotating plate 22 is also a flat plate structure, and its bottom is fixedly mounted with a rotating shaft. The rotating shaft is mounted inside the base plate 21 through bearings, so that the rotating plate 22 can rotate freely around the rotating shaft in the horizontal plane relative to the base plate 21. At the rotational connection between the rotating plate 22 and the base plate 21, i.e., at the location of the rotating shaft, a first bending column 23 extending vertically upward is installed. The first bending column 23 is a cylindrical steel column, and its axis is collinear with the axis of the rotating shaft. The first bending column 23 can rotate freely around its own axis to act as a passive roller during the bending process, rolling and contacting the side wall of the thin steel plate. At the same time, the first bending column 23 revolves around its rotation axis with the rotating plate 22.

[0029] A groove is provided on the upper end of the rotating plate 22 along its length. A bending frame 24 is slidably installed in the groove. The bending frame 24 is a rectangular frame structure with a protrusion at the bottom that matches the groove. The bending frame 24 can slide freely along the axial direction of the rotating plate 22, i.e., the extension direction of the groove, to adjust its distance relative to the first bending column 23. The device for driving the movement is the second hydraulic cylinder 26, which will be described in detail later.

[0030] A vertically arranged second bending column 241 is rotatably installed on the bending frame 24 near the first bending column 23. The second bending column 241 is also a cylindrical steel column, which is mounted on the bending frame 24 by bearings. The second bending column 241 can rotate freely around its own axis. In the initial state, the end of the thin steel plate needs to be inserted into the gap between the first bending column 23 and the second bending column 241. The first bending column 23 and the second bending column 241 together clamp the side walls on both sides of the thin steel plate.

[0031] In order to clamp the thin steel plate and provide bending power, the bending section 20 is also equipped with a second hydraulic cylinder 26 and a first hydraulic cylinder 25.

[0032] The cylinder body of the second hydraulic cylinder 26 is fixedly installed on the lower end face of the rotating plate 22. Its piston rod extends along the axial direction of the rotating plate 22 and is fixedly connected to the bottom of the bending frame 24. When the second hydraulic cylinder 26 extends and retracts, its piston rod pushes the bending frame 24 to slide along the slide groove, thereby driving the second bending column 241 to move closer to or away from the first bending column 23, realizing the function of clamping or releasing the end of the thin steel plate placed on the rotating plate 22.

[0033] The cylinder body of the first hydraulic cylinder 25 is fixedly installed on the upper end of the slide plate 13. A pull rod 251 is connected to the end of its piston rod. The pull rod 251 is a rigid connecting rod. One end of the pull rod is hinged to the end of the piston rod of the first hydraulic cylinder 25. The hinge support provides a fixed rotation center O. The other end is hinged to a connecting rod (the connecting rod is located at the lower end of the slide plate 13 and is not shown. Essentially, the connecting rod and the pull rod 251 form a double hinged connecting rod mechanism). The middle part of the connecting rod is rotatably mounted on the hinge support through a pin, so that the connecting rod can swing in the vertical plane around the fixed rotation center O. One end of the connecting rod is hinged to the end of the pull rod 251 away from the first hydraulic cylinder 25. The other end of the connecting rod is hinged to the hinge point P on the side wall of the rotating plate 22.

[0034] The hinge point P is located radially outside the rotation axis of the rotating plate 22, and the horizontal distance between the hinge point P and the axis of the first bending column 23 is L, where L > 0, to form an effective driving arm. When the piston rod of the first hydraulic cylinder 25 extends or retracts, it pushes the connecting rod to swing around the fixed rotation center O through the pull rod 251. The driven end of the connecting rod drives the rotating plate 22 to rotate around the axis of its first bending column 23, thereby applying a bending torque to the end of the thin steel plate clamped between the first bending column 23 and the second bending column 241. The thin steel plate is bent at the first bending point. Then, the bent parts 20 approach each other under the drive of the sliding plate 13, and bend the thin steel plate in the same direction at the second bending point in the same way, thereby forming the prototype of the seat bucket.

[0035] Please see Figure 1-3 , Figure 6-7 The adjustment unit 30 is installed in the middle of the frame 10 and is located above the structural frame 14.

[0036] The adjustment unit 30 includes a model frame 31 and two leveling frames 32. The adjustment unit 30 is used to accurately correct the spatial position of the bent bucket prototype, especially to position and level the flange portion at the end of the thin steel plate.

[0037] The model frame 31 is a block-shaped component with a specific external contour. Its external contour is the same as the final shape of the seat bucket to be bent and formed, and is C-shaped. It is used as a forming reference and template when bending thin steel plates.

[0038] A second motor 34 and multiple support rods 35 are fixedly installed on the inner side of the model frame 31. The second motor 34 is fixedly installed on the inner wall surface of the model frame 31 through a motor mount. The second motor 34 is a dual-output shaft servo motor, with its two output ends extending vertically upward and vertically downward, respectively. The support rods 35 are horizontally arranged rod-shaped members, with their two ends welded to the inner wall of the model frame 31 to enhance the overall structural strength and rigidity of the model frame 31. A vertical pole 351 is fixedly installed vertically at the middle of its lower end. The vertical pole 351 is a vertically extending column-shaped member, with its lower end extending downward through the bottom of the model frame 31 and fixedly connected to the upper crossbeam of the structural frame 14, thereby supporting the entire adjustment part 30 on the frame 10.

[0039] The second motor 34 has two output ends, one at the top and one at the bottom. Each output end is fixedly connected to a vertically arranged second lead screw 341 via a coupling. That is, one second lead screw 341 extends vertically upward and the other extends vertically downward. The two second lead screws 341 are coaxially arranged with the output ends of the second motor 34. The threads of the two second lead screws 341 have opposite directions, one is a left-hand thread and the other is a right-hand thread. Each second lead screw 341 is fitted with a threaded seat. The internal thread of the threaded seat and the external thread of the second lead screw 341 cooperate to form a threaded transmission pair.

[0040] The adjustment unit 30 also includes two leveling frames 32, which are frame-shaped structures and are respectively set at the upper and lower ends of the model frame 31. Both leveling frames 32 are horizontally set and are parallel to the upper and lower end faces and the left and right sides of the model frame 31. The upper leveling frame 32 is fixedly connected to the threaded seat on the upper second lead screw 341, and the lower leveling frame 32 is fixedly connected to the threaded seat on the lower second lead screw 341. When the second motor 34 rotates, the two second lead screws 341 rotate synchronously. Since the threads of the two lead screws rotate in opposite directions, the two leveling frames 32 are driven to make equidistant and opposite linear movements in the vertical direction, that is, synchronously approaching or synchronously moving away from the model frame 31.

[0041] To ensure the smooth movement and precise guidance of the leveling frame 32, four vertical sliding rods 321 are fixedly installed on the end face of each leveling frame 32 near the model frame 31, namely the lower end face of the upper leveling frame 32 and the upper end face of the lower leveling frame 32. The sliding rods 321 are smooth cylindrical guide rods, which are respectively set at the four corners of the leveling frame 32. On the upper and lower end faces of the model frame 31, through holes of matching size are opened at the positions corresponding to the sliding rods 321. The sliding rods 321 are inserted into the corresponding through holes and can slide freely in the through holes, playing a guiding and balancing role.

[0042] The upper and lower end faces of the model frame 31 are respectively provided with inwardly recessed limiting grooves 311. The end faces of the two leveling frames 32 near the model frame 31 are provided with protrusions that are adapted to the shape of the limiting grooves 311. When the leveling frame 32 moves towards the model frame 31 and closes under the drive of the second motor 34, the protrusions on the leveling frame 32 gradually embed into the limiting grooves 311 on the end face of the model frame 31, so as to reduce the horizontal load on the slide rod 321 caused by the bending frame 24 pushing the thin steel plate to contact the leveling frame 32 during the bending process, and prevent the slide rod 321 from deforming after long-term use.

[0043] When the second motor 34 drives the leveling frame 32 to move up and down respectively, the upper and lower end faces of the leveling frame 32 gradually approach and contact the flange of the thin steel plate. During this process, the ends of the two thin steel plates that were originally misaligned are pushed to the height position of the leveling frame 32 to achieve positioning in the height direction. It should be noted that during this process, the bending frame 24 cannot release the bending action on the thin steel plate in order to keep its barrel-shaped prototype unchanged.

[0044] Example 2: Please refer to further details. Figure 2 and Figure 6 In order to tighten the gap at the joint of the two ends of the thin steel plate after bending, the interior of the leveling frame 32 is designed as a hollow structure, that is, the leveling frame 32 is made of hollow tube. A port is opened in the middle of the side of the leveling frame 32 near the welding part 40, and a port is also opened in the middle of the side of the model frame 31 near the welding part 40, so as to serve as the working area of ​​the welding head.

[0045] A magnetic head 33 is slidably mounted at the port of each leveling frame 32. The magnetic head 33 is a block-shaped component, and its sliding direction is along the length direction of the leveling frame 32, i.e., the horizontal direction. The rear end of the magnetic head 33 is connected to a telescopic drive element, which is fixedly installed inside the leveling frame 32. It can drive the magnetic head 33 to extend or retract along the axial direction of the leveling frame 32. The telescopic drive element is a miniature cylinder, and its cylinder body is fixed to the side away from the port of the hollow inner cavity of the leveling frame 32 by a mounting bracket. Its piston rod extends along the axial direction of the leveling frame 32 and is fixedly connected to the rear end of the magnetic head 33. The air passage of the miniature cylinder is led out through the wire hole opened in the side wall of the leveling frame 32.

[0046] The magnetic head 33 is an electromagnet structure. An electromagnetic coil is wound inside the magnetic head 33, and it is connected to the power supply and control switch through wires. When the magnetic head 33 is energized, its front end generates strong magnetism. When the power is turned off, the magnetism disappears immediately. After the thin steel plate is bent and formed, the magnetic head 33 moves along the axis of the leveling frame 32 under the push of the telescopic drive element to the port near the leveling frame 32 and the model frame 31. It contacts and adheres to the inner side wall of the end of the bent thin steel plate, thereby temporarily fixing the two ends of the thin steel plate. The magnetic head 33 can move a small distance in the direction of the joint at the same time, and apply a pushing force to the joint gap at both ends of the thin steel plate to make the joint fit tightly, thereby achieving alignment in the thickness direction and providing good welding conditions for subsequent welding.

[0047] like Figure 1 and Figure 7 As shown, the welding section 40 includes a horizontally arranged welding frame 41. The welding frame 41 is generally L-shaped, including a horizontal section and a vertical section. The horizontal section of the welding frame 41 is inserted into the hollow cavity inside the structural frame 14 and can slide back and forth in the horizontal direction. A third lead screw 43 is rotatably installed in the internal cavity of the structural frame 14. The third lead screw 43 extends along the horizontal direction of the structural frame 14, i.e., the front-back direction. One end of the third lead screw 43 is fixedly connected to the output shaft of the third motor 431, which is fixedly installed on the side wall of the structural frame 14, through a coupling. A threaded seat is fixedly installed at the end of the horizontal section of the welding frame 41. The threaded seat is threadedly connected to the third lead screw 43. When the third motor 431 drives the third lead screw 43 to rotate, the horizontal section of the welding frame 41 moves along the axial direction of the structural frame 14, i.e., the horizontal front-back direction, through the threaded transmission. This causes the welding frame 41 and the welding torch on it to move closer to or further away from the butt joint of the seat, realizing the feeding and retraction effect of the welding torch.

[0048] A vertically arranged mounting strip 411 is fixedly installed at the upper end of the vertical section of the welding frame 41. The mounting strip 411 is a long strip of metal plate with multiple equally spaced mounting holes 412 on its surface along the vertical direction. The mounting holes 412 are circular through holes with a diameter that matches the outer diameter of the welding torch. A threaded through hole is provided on the side wall of the mounting strip 411 corresponding to each mounting hole 412, and a fixing bolt 42 is threadedly installed thereon. The front end of the fixing bolt 42 can extend into the mounting hole 412.

[0049] The welding part 40 also includes a welding torch, which is a conventional electric arc welding torch or a laser welding torch. The torch body passes horizontally through the mounting hole 412 and is fixed by the fixing bolt 42.

[0050] When in use, the multi-point fully automatic welding device for the electric tricycle seat first places the thin steel plate vertically, positioning it by inserting its center into the gap between the tripod 141 and the model frame 31. Magnets are embedded in the side wall of the tripod 141 to attract and fix the position of the thin steel plate. At the same time, the two ends of the thin steel plate are respectively inserted into the gap between the first bending post 23 and the second bending post 241 of the two bending parts 20. Then, the second hydraulic cylinder 26 pushes the bending frame 24 to bring the second bending post 241 close to the first bending post 23 to clamp the ends of the thin steel plate. Next, the first hydraulic cylinder 25 drives the rotating plate 22 to rotate around the axis of the first bending post 23 through the pull rod 251, performing the first 90° bend on the thin steel plate at the first preset bending point. After that, the first motor 12 drives the bidirectional first lead screw 121 to rotate, causing the two sliding plates 13 to move the bending part 20 along the sliding plate. The rail 111 moves towards the center of the thin steel plate at a constant speed, and then bends again at 90° in the same direction at the second preset bending point, so that the two ends of the thin steel plate are joined at the front of the model frame 31 to form the initial shape of the seat bucket. After the second bending is completed and before welding, the second motor 34 drives the upper and lower second lead screws 341 to rotate synchronously, so that the upper and lower leveling frames 32 move towards the flange direction of the model frame 31. The leveling frames 32 correct the upper and lower flanges of the thin steel plate to eliminate end face misalignment. Then, the magnetic head 33 is energized to generate magnetism and extends along the axial direction of the leveling frame 32, adsorbing onto the outer surface of the side walls at both ends of the thin steel plate, and then moves outward synchronously to apply a thrust to the joint to make it fit tightly. Finally, the third motor 431 drives the third lead screw 43 to rotate, pushing the welding frame 41 to move towards the seat bucket to the preset welding position, and the welding gun is started to perform multi-point welding along the joint, thereby completing the forming and manufacturing of the seat bucket.

[0051] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A fully automatic multi-point welding device for the seat bucket of an electric tricycle, characterized in that, include: The frame (10) of the support device is equipped with a bending part (20) for bending thin steel plates to form an electric tricycle seat bucket. An adjustment part (30) for adjusting the initial bending seat bucket spatial position is installed on one side of the bending part (20), and a welding part (40) for welding is installed directly opposite the seat bucket joint. The frame (10) includes a base (11), on which a slide rail (111) is installed. A slide plate (13) is slidably installed on the upper end of the slide rail (111). Two sets of slide plates (13) are symmetrically arranged. A drive assembly is also installed on the base (11). The drive assembly drives the two sets of slide plates (13) to move equidistantly and in opposite directions. Two sets of bending sections (20) are also symmetrically arranged. Both sets of bending sections (20) include a base plate (21). A rotating plate (22) is rotatably installed on the upper end of the base plate (21). A vertical first bending column (23) is installed at the rotatable connection between the rotating plate (22) and the base plate (21). The first bending column (23) is rotatably installed on the rotation axis of the rotating plate (22), and the axis of the first bending column (23) is collinear with the rotation axis of the rotating plate (22). A bending frame (24) is slidably installed on the rotating plate (22) along its axial direction. A second hydraulic cylinder (26) is installed on the bending frame (24). The adjustment part (30) includes a model frame (31), the outer contour of which is the same as the seat bucket to be bent and formed. A leveling frame (32) is installed at the upper and lower ends of the model frame (31). The leveling frame (32) moves closer to and away from the model frame (31) in a straight line with equal distance and opposite direction. The welding section (40) includes a welding frame (41), on which the welding torch is horizontally and detachably mounted; The leveling frame (32) at the upper and lower ends of the model frame (31) contacts the flanges at the upper and lower ends of the thin steel plate.

2. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 1, characterized in that, The drive assembly includes a first lead screw (121) rotatably mounted on a base (11). One end of the first lead screw (121) is connected to a first motor (12). The first motor (12) is fixedly mounted on the base (11). The output shaft of the first motor (12) is fixedly connected to the first lead screw (121). The first lead screw (121) is threadedly connected to the lower ends of two slide plates (13) respectively. The first lead screw (121) is a bidirectional lead screw with opposite thread directions at both ends.

3. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 2, characterized in that, The second motor (34) and the support rod (35) are fixedly installed on the inner side of the model frame (31). The two ends of the support rod (35) are fixed on the inner side of the model frame (31). The lower end of the support rod (35) is vertically and fixedly installed with a pole (351). The lower end of the pole (351) is fixedly connected to the structural frame (14).

4. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 3, characterized in that, The second motor (34) has two output ends, and a second lead screw (341) is fixedly installed on each output end. The second motor (34) and the second lead screw (341) are both located in the vertical direction. A threaded seat is fitted on the end of the second lead screw (341) away from the second motor (34). The threaded seat is threadedly connected to the second lead screw (341). The threaded seat is fixedly installed on the leveling frame (32). Multiple vertical sliding rods (321) are fixedly installed on the end face of the leveling frame (32) near the model frame (31). A through hole of corresponding size is opened on the end face of the model frame (31) at the position corresponding to the sliding rod (321). The sliding rod (321) passes through the through hole and slides in it.

5. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 4, characterized in that, The upper and lower ends of the model frame (31) are respectively provided with limiting grooves (311). Correspondingly, the two leveling frames (32) are provided with protrusions that are adapted to the limiting grooves (311) on the end face of the model frame (31). When the leveling frame (32) moves up and down, the protrusions can be embedded in the limiting grooves (311).

6. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 5, characterized in that, The interior of the leveling frame (32) is hollow. The leveling frame (32) and the model frame (31) have ports in the middle of the side near the welding part (40). A magnetic head (33) is slidably installed at the port of the leveling frame (32). The magnetic head (33) can be attracted to the side wall of the bent thin steel plate to temporarily fix its end. The magnetic head (33) can move along the axial direction of the leveling frame (32).

7. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 3, characterized in that, The upper end of the structural frame (14) is also fixedly installed with a tripod (141). The middle part of the thin steel plate is inserted into the gap between the tripod (141) and the model frame (31) in the initial state. The two ends of the thin steel plate are inserted into the gap between the first bending column (23), the second bending column (241), and the bending frame (24). The first hydraulic cylinder (25) drives the pull rod (251) to drive the rotating plate (22) and the bending frame (24) on it to rotate. The thin steel plate is bent at the first bending point for the first time at 90°. The sliding plate (13) drives the bending part (20) to approach the middle of the thin steel plate and bends the thin steel plate at the second bending point again at 90° in the same direction to form the prototype of the cylinder seat.

8. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 7, characterized in that, The lower end of the rotating plate (22) is fixedly equipped with a second hydraulic cylinder (26). The second hydraulic cylinder (26) can push the bending frame (24) and the second bending column (241) rotatably mounted on the bending frame (24) to move towards the first bending column (23) to clamp or release the thin steel plate placed on the rotating plate (22).

9. The fully automatic multi-point welding device for the seat bucket of an electric tricycle according to claim 3, characterized in that, A vertical mounting strip (411) is fixedly installed on the upper end of the welding frame (41). Multiple mounting holes (412) are arranged vertically at equal intervals on the mounting strip (411). A fixing bolt (42) is threaded on the side wall of the mounting strip (411) corresponding to the mounting hole (412). The welding gun is fixed in the mounting hole (412) by the fixing bolt (42). The structure frame (14) is hollow inside. The horizontal section of the welding frame (41) is inserted into the structure frame (14) and moves along the axis of the structure frame (14) under the drive of the third lead screw (43) that is rotated and installed in the structure frame (14).

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