Rack structure for welding robot

Abstract

The utility model discloses a rack structure for a welding robot. The rack structure comprises a workbench, a moving assembly, a bottom plate, a rotating assembly, a rotating plate and a driving assembly. The workbench is of a hollow cuboid structure which is horizontally and longitudinally arranged, a bottom plate is horizontally arranged on the left side of the upper surface of the workbench, and the bottom plate horizontally and longitudinally moves on the upper surface of the workbench through a moving assembly. The rotating plate is horizontally arranged on the upper surface of the bottom plate at intervals, is horizontally and rotatably connected with the bottom plate through a rotating assembly, and horizontally and longitudinally moves along with the bottom plate; the welding robot body is vertically and transversely arranged, the fixed end of the welding robot body is vertically hinged to the upper surface of the rotating plate through a driving assembly, the welding end of the welding robot body is arranged towards the right side, and then angle adjustment of the welding robot body is conducted through cooperation of the driving assembly and the rotating assembly. The welding angle can be flexibly adjusted, and the working efficiency is improved.

Description

A frame structure for a welding robot Technical Field

[0001] This utility model relates to the field of welding robot technology, specifically to a frame structure for a welding robot. Background Technology

[0002] With industrial development, welding robots have been widely used. They are frequently seen in many modern automobile production workshops, demonstrating their extensive application in the automotive manufacturing industry. Welding robots primarily perform welding on car bodies and doors, and can handle the welding of multiple car models at a single workstation, significantly improving production efficiency and welding quality.

[0003] However, existing welding robot rotating frames require manual adjustment of the rotation angle during use to adapt to different welding positions of parts. This process is time-consuming and labor-intensive, severely impacting production efficiency. Therefore, these problems urgently need to be solved. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a frame structure for a welding robot. By setting a rotating component, the welding robot body can rotate horizontally with the rotating plate. In conjunction with the drive component, the welding angle can be flexibly adjusted, saving time and effort and improving work efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The innovative feature of the frame structure for a welding robot is that it includes a worktable, a moving component, a base plate, a rotating component, a rotating plate, and a driving component. The worktable is a hollow cuboid structure arranged horizontally and longitudinally, with a base plate horizontally positioned on the left side of its upper surface. The base plate moves horizontally and longitudinally on the upper surface of the worktable via the moving component. The rotating plate is horizontally spaced on the upper surface of the base plate and is horizontally rotatably connected to the base plate via the rotating component, moving horizontally and longitudinally with the base plate. The welding robot body is vertically and laterally positioned, with its fixed end vertically hinged to the upper surface of the rotating plate via the driving component. Its welding end faces to the right, thereby adjusting the angle of the welding robot body through the cooperation of the driving component and the rotating component.

[0006] Preferably, the moving component includes a fixed plate, a slide rail, a slider, a first gear, a rack, and a first motor; inside the worktable, on the left side, there are also vertically and horizontally arranged fixed plates symmetrically spaced back and forth, with the lower and left ends of the two fixed plates fixedly connected to the inner bottom surface and the left side wall of the worktable, respectively, and their upper ends spaced apart directly below the inner top surface of the worktable; a rack is also horizontally and longitudinally arranged in the middle position between the two fixed plates, with the teeth of the rack facing to the right, and both ends of the rack being fixedly connected to the corresponding fixed plates, and several ribs for supporting the rack are arranged vertically and sequentially along its length between its lower surface and the inner bottom surface of the worktable; slide rails are also horizontally and longitudinally spaced on the left and right sides directly above the rack, and the two ends of the two slide rails are respectively connected to the worktable via flanges. The front and rear inner sidewalls are fixedly connected, and the two ends of their lower surfaces are respectively fixedly connected to the upper surfaces of the corresponding fixed plates; the lower surface of the base plate is also fixedly provided with rectangular horizontally symmetrical sliders that match the slide rails, and the setting position of each slider corresponds to the setting position of the corresponding slide rail; each slider extends vertically downward into the interior of the worktable and is respectively sleeved with the corresponding slide rail, thereby allowing the base plate to slide horizontally and longitudinally connected with the corresponding slide rail through the sliders; a first motor is also vertically fixed on the upper surface of the base plate near the front side and between the two slide rails, the output end of the first motor extends vertically downward into the interior of the worktable and is connected to the rack through a first gear, thereby driving the first motor and, through the meshing of the first gear and the rack, the base plate moves horizontally to the left side of the upper surface of the worktable.

[0007] Preferably, the position of the first motor does not interfere with the horizontal rotation of the rotating plate, and neither of the two slide rails interferes with the movement of the first gear.

[0008] Preferably, on the upper surface of the worktable, a first strip groove is also provided on the left side at horizontal and vertical intervals. The two first strip grooves are matched with each of the sliders, and their positions are corresponding to the horizontal sliding trajectory of the corresponding slider. Thus, by providing the first strip groove, it is ensured that the worktable does not interfere with the horizontal and vertical movement of the base plate.

[0009] Preferably, a second strip groove is provided on the left side of the upper surface of the worktable and is horizontally and vertically embedded between the two first strip grooves. The second strip groove matches the output end of the first motor and its setting position corresponds to the horizontal sliding trajectory of the first motor. Thus, by setting the second strip groove, it is ensured that the worktable does not interfere with the horizontal and vertical movement of the base plate.

[0010] Preferably, the rotating assembly includes a housing, a main bevel gear, a driven bevel gear, a gear shaft, and a second motor; a hollow cylindrical housing with an open lower surface is horizontally disposed on the upper surface of the base plate relative to the rear side of the first motor, and the lower surface of the housing is fixedly connected to the upper surface of the base plate and is arranged without interfering with the first motor; a gear shaft is vertically coaxially disposed within the housing, and the diameter of the gear shaft is smaller than the inner diameter of the housing; the lower end of the gear shaft is rotatably connected to the upper surface of the base plate, and its upper end extends vertically upward beyond the upper surface of the housing and is connected to the rotating assembly. The lower surface of the moving plate is coaxially fixedly connected to the middle position; a driven bevel gear is also horizontally and coaxially sleeved and fixed on the gear shaft relative to the inside of the housing, and the driven bevel gear and the housing are not interfered with each other; a second motor is also horizontally arranged inside the housing relative to the driven bevel gear, the fixed end of the second motor is screwed to the corresponding inner side of the housing, and its output end is horizontally arranged in the direction of the driven bevel gear, and is connected to the driven bevel gear through the meshing of the main bevel gear, so that under the drive of the second motor, the gear shaft rotates around its own axis and drives the rotating plate to rotate horizontally.

[0011] Preferably, it also includes a roller assembly; a ring of rollers is also connected to the upper surface of the housing and abuts against the lower surface of the rotating plate, and the ring of rollers is coaxially arranged with the rotating plate and is not interfered with by the gear shaft, thereby ensuring the stability of the horizontal rotation of the rotating plate through the roller assembly; each of the roller assemblies is conical, with one end near the gear shaft being the small end and the other end being the large end, so as to accommodate the smaller linear velocity near the gear shaft when the rotating plate rotates.

[0012] Preferably, the drive assembly includes a side plate, a third motor, a motor mounting bracket, a main gear, a driven gear, and a rotating shaft; symmetrically spaced vertical and horizontally arranged side plates are also provided at the middle position of the upper surface of the rotating plate, and a rotating shaft is also provided horizontally and longitudinally at a position slightly above the two side plates. The two ends of the rotating shaft are respectively rotatably connected to the corresponding side plate about its own axis, and its front end extends vertically outward from the outer surface of the corresponding side plate; a driven gear is coaxially sleeved and fixed to the portion of the rotating shaft extending outward from the corresponding side plate, and the side plate does not interfere with the rotation of the driven gear as the rotating shaft rotates; a U-shaped motor mounting bracket is also provided on the outer surface of the front side plate, directly below the driven gear, and the opening slot of the motor mounting bracket extends vertically upward. The bottom is oriented downwards, and its two open ends are respectively vertically fixedly connected to the corresponding positions on the outer side surfaces of the side plates. A third motor is also horizontally and longitudinally arranged on the outer bottom surface of the motor mounting frame. The output end of the third motor extends vertically into the interior of the motor mounting frame and is connected to the driven gear through the main gear, ensuring that the motor mounting frame does not interfere with the rotation of the main gear. The fixed end of the welding robot body is coaxially sleeved on the rotating shaft between the two side plates, and its welding end extends to the right side out of the vertical plane where the right end face of the bottom plate is located. Then, driven by the third motor, through the meshing of the main gear and the driven gear, the welding robot body swings vertically with the rotating shaft and rotates horizontally with the rotating plate.

[0013] Preferably, it also includes a reinforcing plate; a reinforcing plate is also provided vertically between the outer side surface of each side plate and the upper surface of the rotating plate, and each reinforcing plate does not interfere with the movement of the main gear, and the corresponding side plate is fixed and reinforced by the reinforcing plate.

[0014] The beneficial effects of this utility model are:

[0015] (1) By setting a rotating component, the welding robot body can rotate horizontally with the rotating plate. Then, in conjunction with the drive component, the welding angle can be flexibly adjusted, saving time and effort and improving work efficiency.

[0016] (2) By setting up a moving component, this utility model can make the welding robot body move horizontally with the base plate, thereby moving it to a designated position to perform welding operations, and has a wide range of applications. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the frame structure for a welding robot according to this utility model.

[0019] Figure 2 is a side view of Figure 1.

[0020] The components are as follows: 1-Workbench; 2-Fixed plate; 3-Slide rail; 4-Slider; 5-First gear; 6-Rack; 7-Base plate; 8-First motor; 9-Box body; 10-Main bevel gear; 11-Driven bevel gear; 12-Gear shaft; 13-Second motor; 14-Rotating plate; 15-Roller assembly; 16-Side plate; 17-Reinforcing plate; 18-Third motor; 19-Motor mounting bracket; 20-Main gear; 21-Driven gear; 22-Rotating shaft; 23-Welding robot body. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0022] The present invention provides a frame structure for a welding robot, including a worktable 1, a moving component, a base plate 7, a rotating component, a rotating plate 14, and a driving component; the specific structure is shown in Figures 1 and 2. The worktable 1 is a hollow cuboid structure arranged horizontally and longitudinally, and a base plate 7 is also arranged horizontally on the left side of its upper surface. The base plate 7 moves horizontally and longitudinally on the upper surface of the worktable 1 through the moving component.

[0023] The movable component of this utility model includes a fixed plate 2, a slide rail 3, a slider 4, a first gear 5, a rack 6, and a first motor 8. As shown in Figures 1 and 2, the fixed plates 2 are symmetrically arranged vertically and horizontally on the left side of the inside of the workbench 1. The lower end face and left end face of the two fixed plates 2 are fixedly connected to the inner bottom surface and the left side wall of the workbench 1, respectively, and their upper end face is spaced below the inner top surface of the workbench 1. A rack 6 is arranged horizontally and longitudinally in the middle position between the two fixed plates 2, and the tooth surface of the rack 6 is arranged facing the right. The two ends of the rack 6 are fixedly connected to the corresponding fixed plates 2, and several ribs for supporting the rack 6 are arranged vertically and longitudinally along its length between its lower surface and the inner bottom surface of the workbench 1. Slide rails 3 are arranged horizontally and longitudinally on the left and right sides directly above the rack 6. The two ends of the two slide rails 3 are fixedly connected to the front and rear inner side walls of the workbench 1 through flanges, and the two ends of their lower surfaces are fixedly connected to the upper surfaces of the corresponding fixed plates 2.

[0024] As shown in Figures 1 and 2, a rectangular, horizontally symmetrical slider 4 matching the slide rail 3 is fixedly mounted on the lower surface of the base plate 7, with each slider 4 positioned corresponding to the slide rail 3. Each slider 4 extends vertically downward into the interior of the worktable 1 and engages with the corresponding slide rail 3, allowing the base plate 7 to slide horizontally and longitudinally with the slide rail 3 via the slider 4. A first motor 8 is vertically fixed on the upper surface of the base plate 7, near the front and between the two slide rails 3. The output end of the first motor 8 extends vertically downward into the interior of the worktable 1 and meshes with the rack 6 via the first gear 5. The position of the first motor 8 does not interfere with the horizontal rotation of the rotating plate 14, and neither slide rail 3 interferes with the movement of the first gear 5. Driven by the first motor 8, and through the meshing of the first gear 5 and rack 6, the base plate 7 moves horizontally to the left side of the upper surface of the worktable 1.

[0025] As shown in Figures 1 and 2, two first strip grooves are embedded horizontally and vertically at intervals on the left side of the upper surface of the worktable 1. Each of the two first strip grooves matches each slider 4, and their positions correspond to the horizontal sliding trajectory of the corresponding slider 4. Thus, by setting the first strip grooves, it is ensured that the worktable 1 does not interfere with the horizontal and vertical movement of the base plate 7.

[0026] As shown in Figures 1 and 2, a second strip groove is horizontally and vertically embedded on the left side of the upper surface of the worktable 1, relative to the two first strip grooves. The second strip groove matches the output end of the first motor 8, and its setting position corresponds to the horizontal sliding trajectory of the first motor 8. Thus, by setting the second strip groove, it is ensured that the worktable 1 does not interfere with the horizontal longitudinal movement of the base plate 7.

[0027] The rotating plate 14 of this utility model is horizontally spaced on the upper surface of the base plate 7 and is horizontally rotatably connected to the base plate 7 via a rotating assembly, and moves horizontally longitudinally with the base plate 7. The rotating assembly includes a housing 9, a main bevel gear 10, a driven bevel gear 11, a gear shaft 12, a second motor 13, and a roller assembly 15. As shown in Figures 1 and 2, a hollow cylindrical housing 9 with an open lower surface is horizontally provided on the upper surface of the base plate 7 relative to the rear side of the first motor 8. The lower surface of the housing 9 is fixedly connected to the upper surface of the base plate 7 and is not interfered with by the first motor 8. A gear shaft 12 is vertically and coaxially arranged inside the housing 9, and the diameter of the gear shaft 12 is smaller than... The inner diameter of the housing 9; the lower end of the gear shaft 12 is rotatably connected to the upper surface of the base plate 7, and its upper end extends vertically upward beyond the upper surface of the housing 9, and is coaxially fixedly connected to the middle position of the lower surface of the rotating plate 14; a driven bevel gear 11 is also horizontally and coaxially sleeved and fixed on the gear shaft 12 relative to the inside of the housing 9, and the driven bevel gear 11 and the housing 9 are not interfered with each other; a second motor 13 is also horizontally arranged inside the housing 9 on one side relative to the driven bevel gear 11, the fixed end of the second motor 13 is screwed and fixed to the corresponding inner side of the housing 9, and its output end is horizontally arranged in the direction of the driven bevel gear 11, and is meshed with the driven bevel gear 11 through the main bevel gear 10. Under the drive of the second motor 13, the gear shaft 12 rotates around its own axis, and drives the rotating plate 14 to rotate horizontally.

[0028] As shown in Figures 1 and 2, a ring of rollers 15 is connected to the upper surface of the housing 9 and abuts against the lower surface of the rotating plate 14. The ring of rollers 15 is coaxial with the rotating plate 14 and is not interfered with by the gear shaft 12. Thus, the rollers 15 ensure the stability of the horizontal rotation of the rotating plate 14. Each roller 15 is conical, with the end near the gear shaft 12 being the small end and the other end being the large end, so as to accommodate the smaller linear velocity near the gear shaft 12 when the rotating plate 14 rotates.

[0029] The welding robot body 23 of this utility model is arranged vertically and horizontally, and its fixed end is vertically hinged to the upper surface of the rotating plate 14 through the drive assembly. Its welding end is arranged to the right, and the angle of the welding robot body 23 can be adjusted by the cooperation of the drive assembly and the rotating assembly. The drive assembly includes a side plate 16, a reinforcing plate 17, a third motor 18, a motor fixing frame 19, a main gear 20, a driven gear 21, and a rotating shaft 22. As shown in Figures 1 and 2, the side plates 16 are symmetrically arranged vertically and horizontally at the middle position of the upper surface of the rotating plate 14, and the rotating shaft 22 is arranged horizontally and longitudinally between the two side plates 16. The two ends of the rotating shaft 22 are respectively rotatably connected to the corresponding side plate 16 around its own axis, and the front end of the shaft 22 extends vertically out of the outer surface of the corresponding side plate 16. The portion of the rotating shaft 22 extending out of the corresponding side plate 16 is also coaxially sleeved and fixed with the driven gear 21, and the side plate 16 does not affect the rotation of the driven gear 21 with the rotation of the rotating shaft 22. To prevent interference, a U-shaped motor mounting bracket 19 is provided on the outer side of the front side plate 16 directly below the driven gear 21. The opening slot of the motor mounting bracket 19 is set in the vertical direction, and its two opening ends are respectively vertically fixed to the corresponding positions on the outer side of the corresponding side plate 16. A third motor 18 is also provided horizontally and longitudinally on the outer bottom surface of the motor mounting bracket 19. The output end of the third motor 18 extends vertically into the interior of the motor mounting bracket 19 and is connected to the driven gear 21 through the main gear 20, ensuring that the rotation of the main gear 20 is not interfered with by the motor mounting bracket 19. The fixed end of the welding robot body 23 is coaxially sleeved on the rotating shaft 22 between the two side plates 16, and its welding end extends to the right side out of the vertical plane where the right end face of the bottom plate 7 is located. Then, driven by the third motor 18, through the meshing of the main gear 20 and the driven gear 21, the welding robot body 23 swings vertically with the rotating shaft 22 and rotates horizontally with the rotating plate 14.

[0030] As shown in Figure 2, a reinforcing plate 17 is vertically arranged between the outer surface of each side plate 16 and the upper surface of the rotating plate 14. Each reinforcing plate 17 does not interfere with the movement of the main gear 20, and the corresponding side plate 16 is fixed and reinforced by the reinforcing plate 17.

[0031] The working principle of this utility model is as follows: First, under the drive of the moving component, the welding robot body 23 moves horizontally to the designated position along with the base plate 7. Then, through the cooperation of the rotating component and the driving component, the welding angle of the welding robot body 23 is adjusted, and then the welding operation can be carried out.

[0032] The beneficial effects of this utility model are:

[0033] (1) By setting a rotating component, the welding robot body 23 can rotate horizontally with the rotating plate 14, and then cooperate with the drive component to flexibly adjust the welding angle, saving time and effort and improving work efficiency.

[0034] (2) By setting up a moving component, the welding robot body 23 can move horizontally with the base plate 7, thereby moving it to a designated position to perform welding operations, which has a wide range of applications.

[0035] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A gantry structure for a welding robot, characterized by: The system includes a worktable, a moving component, a base plate, a rotating component, a rotating plate, and a driving component. The worktable is a hollow cuboid structure arranged horizontally and longitudinally, with a base plate horizontally positioned on the left side of its upper surface. The base plate moves horizontally and longitudinally on the upper surface of the worktable via the moving component. The rotating plate is horizontally spaced on the upper surface of the base plate and is horizontally rotatably connected to the base plate via the rotating component, moving horizontally and longitudinally with the base plate. The welding robot body is vertically and laterally positioned, with its fixed end vertically hinged to the upper surface of the rotating plate via the driving component. Its welding end faces to the right, and the angle of the welding robot body is adjusted through the cooperation of the driving component and the rotating component.

2. The frame structure for a welding robot according to claim 1, characterized in that: The moving assembly includes a fixed plate, slide rails, a slider, a first gear, a rack, and a first motor. Inside the worktable, on the left side, two vertically and horizontally arranged fixed plates are symmetrically spaced. The lower and left ends of the two fixed plates are fixedly connected to the inner bottom surface and the left side wall of the worktable, respectively, and their upper ends are spaced below the inner top surface of the worktable. A rack is horizontally and longitudinally arranged in the middle between the two fixed plates, with the teeth of the rack facing to the right. Both ends of the rack are fixedly connected to the corresponding fixed plates, and several ribs for supporting the rack are vertically arranged at intervals along its length between its lower surface and the inner bottom surface of the worktable. Slide rails are horizontally and longitudinally spaced on both sides directly above the rack, and the ends of the two slide rails are connected to the front and rear ends of the worktable via flanges. The inner sidewall is fixedly connected, and its lower surface ends are respectively fixedly connected to the upper surface of the corresponding fixed plate; a rectangular horizontally symmetrical slider matching the slide rail is also fixedly provided on the lower surface of the base plate, and the setting position of each slider corresponds to the setting position of the corresponding slide rail; each slider extends vertically downward into the interior of the worktable and is respectively sleeved with the corresponding slide rail, thereby allowing the base plate to slide horizontally and longitudinally connected with the corresponding slide rail through the slider; a first motor is also vertically fixed on the upper surface of the base plate near the front side and between the two slide rails, the output end of the first motor extends vertically downward into the interior of the worktable and is connected to the rack through a first gear, thereby driving the first motor and through the meshing of the first gear and rack, the base plate moves horizontally to the left side of the upper surface of the worktable.

3. The gantry structure for a welding robot according to claim 2, characterized in that: The position of the first motor does not interfere with the horizontal rotation of the rotating plate, and neither of the two slide rails interferes with the movement of the first gear.

4. The gantry structure for a welding robot according to claim 3, characterized in that: On the upper surface of the worktable, on the left side, there are two horizontally and vertically embedded first strip grooves. Each of the two first strip grooves matches each of the sliders, and their positions correspond to the horizontal sliding trajectory of the corresponding slider. Thus, by setting the first strip grooves, it is ensured that the worktable does not interfere with the horizontal and vertical movement of the base plate.

5. The frame structure for a welding robot according to claim 4, characterized in that: On the upper surface of the workbench, on the left side and between the two first slots, a second slot is also horizontally and vertically embedded. The second slot matches the output end of the first motor, and its position corresponds to the horizontal sliding trajectory of the first motor. Thus, by setting the second slot, it is ensured that the workbench does not interfere with the horizontal and longitudinal movement of the base plate.

6. The gantry structure for a welding robot according to claim 2, characterized in that: The rotating assembly includes a housing, a main bevel gear, a driven bevel gear, a gear shaft, and a second motor. A hollow cylindrical housing with an open lower surface is horizontally positioned on the upper surface of the base plate relative to the rear side of the first motor. The lower surface of the housing is fixedly connected to the upper surface of the base plate and is designed to not interfere with the first motor. A gear shaft is vertically and coaxially positioned within the housing, with a diameter smaller than the inner diameter of the housing. The lower end of the gear shaft is rotatably connected to the upper surface of the base plate, and its upper end extends vertically upward beyond the upper surface of the housing, connecting with the rotating plate. The gear shaft is coaxially fixed at the middle position of its lower surface; a driven bevel gear is also horizontally and coaxially fixed on the gear shaft relative to the inside of the housing, and the driven bevel gear and the housing are not interfered with each other; a second motor is also horizontally arranged inside the housing relative to the driven bevel gear, the fixed end of the second motor is screwed to the corresponding inner side of the housing, and its output end is horizontally arranged in the direction of the driven bevel gear, and is connected to the driven bevel gear through the meshing of the main bevel gear, so that under the drive of the second motor, the gear shaft rotates around its own axis and drives the rotating plate to rotate horizontally.

7. A gantry structure for a welding robot according to claim 6, characterized in that: It also includes a roller assembly; a ring of rollers is connected to the upper surface of the housing and abuts against the lower surface of the rotating plate. The roller assembly is coaxial with the rotating plate and is not interfered with by the gear shaft. The roller assembly ensures the stability of the horizontal rotation of the rotating plate. Each roller assembly is conical, with a small end near the gear shaft and a large end near the gear shaft, to accommodate the smaller linear velocity near the gear shaft when the rotating plate rotates.

8. The frame structure for a welding robot according to claim 1, characterized in that: The drive assembly includes side plates, a third motor, a motor mounting bracket, a main gear, a driven gear, and a rotating shaft. On the upper surface of the rotating plate, symmetrically spaced side plates are arranged vertically and horizontally at intervals. A rotating shaft is positioned slightly above and between two side plates, with both ends of the shaft rotatably connected to the corresponding side plate about its own axis, and its front end extending vertically beyond the outer surface of the corresponding side plate. A driven gear is coaxially fitted and fixed to the portion of the rotating shaft extending beyond the corresponding side plate, and the side plates do not interfere with the rotation of the driven gear as the shaft rotates. A U-shaped motor mounting bracket is located on the outer surface of the front side plate, directly below the driven gear, with the opening slot of the motor mounting bracket extending vertically upwards and downwards. The welding robot body is positioned such that its two open ends are vertically and fixedly connected to the corresponding outer surfaces of the side plates. A third motor is also horizontally and longitudinally arranged on the outer bottom surface of the motor mounting frame. The output end of the third motor extends vertically into the interior of the motor mounting frame and is connected to the driven gear through a main gear, ensuring that the motor mounting frame does not interfere with the rotation of the main gear. The fixed end of the welding robot body is coaxially sleeved on the rotating shaft between the two side plates, and its welding end extends to the right side out of the vertical plane where the right end face of the bottom plate is located. Driven by the third motor, the welding robot body swings vertically with the rotating shaft and rotates horizontally with the rotating plate through the meshing of the main gear and the driven gear.

9. The gantry structure for a welding robot according to claim 8, characterized in that: It also includes a reinforcing plate; a reinforcing plate is also provided vertically between the outer side of each side plate and the upper surface of the rotating plate, and each reinforcing plate does not interfere with the movement of the main gear, and the corresponding side plate is fixed and reinforced by the reinforcing plate.

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