A skeleton welding device for unicycle

Abstract

The application relates to the technical field of welding tool equipment, in particular to a unicycle framework welding device, which comprises an operation table, a fixing mechanism for fixing a center vertical pipe is arranged at the top end of the operation table, a guide mechanism for guiding a main beam pipe is arranged at the top end of the operation table, a welding machine mechanism for welding a framework is arranged at the top end of the operation table, a slag falling port is arranged in the side wall of the top end of the operation table, and a polishing mechanism for pre-welding pretreatment of a welding port is arranged in the side wall of the slag falling port. The unicycle framework welding device can automatically polish the welding port of the center vertical pipe through the polishing mechanism before welding, can effectively remove burrs, oxide skins and uneven cutting surfaces of the port, can make the welding end surface smooth, and can significantly improve the pipe joint adhesion and the welding gap uniformity.

Description

Technical Field

[0001] This invention relates to the field of welding tooling and equipment technology, and in particular to a welding device for the frame of a wheelbarrow. Background Technology

[0002] Electric unicycles are a lightweight and flexible short-distance transportation tool, widely used in daily travel, leisure sports and other scenarios. Their frame is the core load-bearing structure of the whole vehicle, mainly composed of a central vertical tube and a main beam tube welded together. The welding strength, positioning accuracy and dimensional consistency of the frame directly determine the unicycle's load-bearing capacity, running stability and safety.

[0003] Currently, in the processing of unicycle frames, the end faces of pipes often have burrs, oxide scale, and uneven cuts. If these are not treated before welding, it is easy to cause defects such as poor weld fusion, slag inclusions, porosity, and incomplete penetration, which seriously affect the strength and service life of the frame. First, the central vertical pipe and the main beam pipe lack automated beveling and end face treatment processes before welding, and mostly rely on simple manual grinding, which has poor treatment effect and low efficiency. The fitting of the pipes is insufficient, which easily causes welding defects. Second, the positioning of the pipes relies on manual placement, and the alignment accuracy of the central vertical pipe and the main beam pipe is low, which easily leads to misalignment, poor perpendicularity, and uneven welding gaps. Thermal deformation and displacement are prone to occur during welding, resulting in large deviations in the overall size of the frame and poor consistency. At the same time, the manual operation process is cumbersome and labor-intensive, and the welding waste is scattered and difficult to collect, which cannot meet the needs of efficient, stable, and standardized mass production. In order to solve the above problems, we propose a unicycle frame welding device. Summary of the Invention

[0004] The main objective of this invention is to provide a frame welding device for a unicycle, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A frame welding device for a unicycle includes an operating platform. A fixing mechanism for securing a central vertical tube is located at the top of the operating platform. A guiding mechanism for guiding a main beam tube is also located at the top of the operating platform. A welding machine mechanism for welding the frame is located at the top of the operating platform. A slag discharge port is provided on the side wall of the top of the operating platform. A grinding mechanism for pre-treatment of the welding port is located on the side wall of the slag discharge port. A slag collection box is located on the side wall of the bottom of the operating platform, and a drawer is detachably connected to the side wall of the slag collection box.

[0007] Preferably, the fixing mechanism includes a first motor fixedly connected to one side wall of the operating table, two bidirectional threaded rods rotatably connected to the inner side wall of the operating table, the output end of the first motor passing through the operating table and fixedly connected to one end of one of the bidirectional threaded rods, a first gear being provided on the outer side wall of each of the two bidirectional threaded rods, and the same transmission chain being rotatably connected to the outer side wall of each of the two first gears.

[0008] Preferably, each of the two bidirectional threaded rods has a movable block rotatably connected to its outer sidewall. The top sidewall of the movable block is provided with a guide plate, and the top sidewall of the guide plate is provided with a first electric slide rail. The inner sidewall of the first electric slide rail is slidably connected with a first electric slider. The top sidewall of the first electric slider is rotatably connected with a second gear. The top sidewall of the second gear is provided with a first fixing frame, and the inner sidewall of the first fixing frame is rotatably connected with a positioning cylinder.

[0009] Preferably, a sleeve is provided on one side wall of the positioning cylinder, a second electric telescopic rod is provided on one side wall of the sleeve, a first clamping rod is provided at the telescopic end of the second electric telescopic rod, a plurality of third electric telescopic rods are provided on the outer side wall of the first clamping rod, and a second clamping rod is provided at the telescopic end of each of the plurality of third electric telescopic rods. Two fourth electric telescopic rods are provided on the side wall of the sleeve, and the telescopic ends of the two fourth electric telescopic rods are provided with the same first pressure plate. The inner side wall of the first pressure plate is slidably connected to the outer side wall of the first clamping rod. Two fifth electric telescopic rods are provided on the other side wall of the positioning cylinder, and the telescopic ends of the two fifth electric telescopic rods are fixedly connected to the same second pressure plate.

[0010] Preferably, a second fixed frame is provided on one side wall of the first fixed frame, a rotating rod is rotatably connected to one side wall of the second fixed frame, a fourth gear is provided on the outer side wall of the rotating rod, a second motor is provided on one side wall of the second fixed frame, a sixth electric telescopic rod is provided at the output end of the second motor, a third gear is rotatably connected to the telescopic end of the sixth electric telescopic rod, and the other end of the rotating rod passes through the first fixed frame and is fixedly connected to one side wall of the positioning cylinder.

[0011] Preferably, a first electric telescopic rod is fixedly connected to both side walls of the positioning cylinder, and a first clamping plate is provided at the telescopic end of each of the two first electric telescopic rods. Multiple elastic components are provided at both ends of the inner side wall of the positioning cylinder, and the multiple elastic components are provided with the same positioning frame. Multiple rollers are rotatably connected to the side wall of the positioning frame.

[0012] Preferably, the grinding mechanism includes two eleventh electric telescopic rods fixedly connected to the side wall of the slag outlet. The telescopic ends of the two eleventh electric telescopic rods are fixedly connected to the same movable chamber. A movable bracket is provided on the outer side wall of the movable chamber. The top side wall of the movable bracket is slidably connected to the bottom end of the operating table. A third electric slide rail is provided on the top side wall of the movable bracket. A third electric slider is slidably connected to the inner side wall of the third electric slide rail. A second support frame is provided on the top side wall of the third electric slider. A fifth motor is provided on one side wall of the second support frame. A second rotating block is provided at the output end of the fifth motor. The outer side wall of the second rotating block is slidably connected to the inner side wall of the movable chamber. A grinding component is provided on the top side wall of the second rotating block.

[0013] Preferably, the guiding mechanism includes multiple ninth electric telescopic rods fixedly connected to the top side wall of the operating platform. The telescopic ends of the ninth electric telescopic rods are fixedly connected to the same third fixed frame. Two rollers are symmetrically rotatably connected to the side walls of the two third fixed frames at opposite ends. The outer walls of the two rollers are rotatably connected to the same conveyor belt. A third motor is fixedly connected to one side wall of one of the third fixed frames. The output end of the third motor passes through the side wall of the third fixed frame and is fixedly connected to one end of one of the rollers. Multiple first support frames are fixedly connected to the outer wall of the conveyor belt.

[0014] Preferably, a movable plate is slidably connected to the top side wall of the first support frame, and an eighth electric telescopic rod is fixedly connected to the outer side wall of the first support frame. The telescopic end of the eighth electric telescopic rod passes through one end of the first support frame and is fixedly connected to the side wall of the movable plate. A positioning post is provided on the top side wall of the movable plate, and multiple seventh electric telescopic rods are provided on the outer side wall of the positioning post. Each of the telescopic ends of the multiple seventh electric telescopic rods is provided with a third clamping plate.

[0015] Preferably, the welding machine mechanism includes two fixed blocks on the top sidewall of the operating table, a rotating plate on the top sidewall of each of the two fixed blocks, a first rotating block rotatably connected to the inner sidewall of the rotating plate, a fourth motor on the sidewall of one of the rotating plates, the output end of the fourth motor being fixedly connected to the sidewall of one of the first rotating blocks, a tenth electric telescopic rod on the sidewall of each of the two first rotating blocks, the telescopic ends of the two tenth electric telescopic rods being provided with the same annular frame, a second electric slide rail on the inner sidewall of the annular frame, a second electric slider slidably connected to the inner sidewall of the second electric slide rail, a rotating arm on the bottom sidewall of the second electric slider, and a welding gun fixedly connected to the bottom sidewall of the rotating arm.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This unicycle frame welding device achieves bidirectional clamping, axial pressing, and multi-angle precise positioning of the central vertical tube through a fixing mechanism. In conjunction with the guiding mechanism, it automatically conveys, adjusts the height, and aligns the main beam tube. This enables the central vertical tube and the main beam tube to quickly and accurately connect, ensuring accurate welding position and uniform connection gap. It effectively avoids pipe displacement, shaking, and thermal deformation during the welding process, significantly improving the welding accuracy and structural strength of the frame, increasing the consistency and pass rate of finished products, and reducing the defect rate.

[0018] 2. The unicycle frame welding device automatically grinds the welding port of the central vertical tube before welding using a grinding mechanism. This effectively removes burrs, oxide scale, and uneven cut surfaces from the port, making the welding end face flat and smooth. This significantly improves the fit of the pipe fittings and the uniformity of the welding gap, reducing defects such as weld porosity, slag inclusion, and incomplete penetration from the source. This improves the welding quality and the strength of the frame structure, while avoiding the problems of unstable precision and low efficiency of manual grinding, ensuring the consistency of batch products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 This is a partial structural diagram of the fixing mechanism of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the fixing mechanism of the present invention;

[0023] Figure 5 This is a second partial cross-sectional view of the fixing mechanism of the present invention;

[0024] Figure 6 This is a partial structural diagram of the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the grinding mechanism of the present invention;

[0026] Figure 8 This is a partial cross-sectional view of the guiding mechanism of the present invention;

[0027] Figure 9 This is a partial structural diagram of the welding machine mechanism of the present invention.

[0028] In the diagram: 1. Operating platform; 12. Slag discharge port; 13. Slag collection box; 2. Fixing mechanism; 3. Guiding mechanism; 4. Welding mechanism; 5. Grinding mechanism; 21. First motor; 22. Bidirectional threaded rod; 23. First gear; 24. Transmission chain; 25. Moving block; 26. Guide plate; 27. First electric slide rail; 28. First electric slider; 29. ​​Second gear; 210. First fixing frame; 211. Positioning cylinder; 212. First... 213. Electric telescopic pole; 214. First clamping plate; 215. Elastic component; 216. Positioning frame; 217. Roller; 218. Second motor; 219. Sleeve; 220. Second electric telescopic pole; 221. First clamping rod; 222. Third electric telescopic pole; 223. Second clamping rod; 224. Fourth electric telescopic pole; 225. First pressure plate; 226. Fifth electric telescopic pole; 227. Second pressure plate; 228. Second fixing frame ; 228. Sixth electric telescopic rod; 229. Third gear; 230. Rotating rod; 231. Fourth gear; 31. Third fixed frame; 32. Third motor; 33. Roller; 34. Conveyor belt; 35. First support frame; 36. Moving plate; 37. Positioning column; 38. Seventh electric telescopic rod; 39. Third clamping plate; 310. Eighth electric telescopic rod; 311. Ninth electric telescopic rod; 41. Fixed block; 42. Rotating plate; 43. First rotating block; 44. Tenth electric telescopic rod; 45. Ring frame; 46. Second electric slide rail; 47. Second electric slider; 48. Rotating arm; 49. Welding gun; 410. Fourth motor; 51. Eleventh electric telescopic rod; 52. Moving compartment; 53. Moving bracket; 54. Third electric slide rail; 55. Third electric slider; 56. Second support frame; 57. Fifth motor; 58. Second rotating block; 59. Grinding assembly. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figure 1 - Figure 9 As shown, a unicycle frame welding device includes an operating platform 1, a fixing mechanism 2 for fixing the central vertical tube at the top of the operating platform 1, a guiding mechanism 3 for guiding the main beam tube at the top of the operating platform 1, a welding machine mechanism 4 for welding the frame at the top of the operating platform 1, a slag discharge port 12 on the top side wall of the operating platform 1, a grinding mechanism 5 for pre-treatment of the welding port on the side wall of the slag discharge port 12, and a slag collection box 13 on the bottom side wall of the operating platform 1, with a drawer detachably connected to the side wall of the slag collection box 13.

[0031] In this embodiment, the fixing mechanism 2 includes a first motor 21 fixedly connected to one side wall of the operating table 1. Two bidirectional threaded rods 22 are rotatably connected to the inner side wall of the operating table 1. The output end of the first motor 21 passes through the operating table 1 and is fixedly connected to one end of one of the bidirectional threaded rods 22. A first gear 23 is provided on the outer side wall of each of the two bidirectional threaded rods 22. The same transmission chain 24 is rotatably connected to the outer side wall of each of the two bidirectional threaded rods 22. A moving block 25 is rotatably connected to the outer side wall of each of the two bidirectional threaded rods 22. A guide plate 26 is provided on the top side wall of the moving block 25. A first electric slide rail 27 is provided on the top side wall of the guide plate 26. The inner side wall of the first electric slide rail 27... A first electric slider 28 is slidably connected. A second gear 29 is rotatably connected to the top side wall of the first electric slider 28. A first fixing frame 210 is provided on the top side wall of the second gear 29. A positioning cylinder 211 is rotatably connected to the inner side wall of the first fixing frame 210. A sleeve 218 is provided on one side wall of the positioning cylinder 211. A second electric telescopic rod 219 is provided on one side wall of the sleeve 218. A first clamping rod 220 is provided at the telescopic end of the second electric telescopic rod 219. Multiple third electric telescopic rods 221 are provided on the outer side wall of the first clamping rod 220. A second clamping rod 222 is provided at the telescopic end of each of the multiple third electric telescopic rods 221. The side wall of the sleeve 218 is provided with... Two fourth electric telescopic rods 223 are provided, and the telescopic ends of the two fourth electric telescopic rods 223 are provided with the same first pressure plate 224. The inner side wall of the first pressure plate 224 is slidably connected to the outer side wall of the first clamping rod 220. Two fifth electric telescopic rods 225 are provided on the other side wall of the positioning cylinder 211. The telescopic ends of the two fifth electric telescopic rods 225 are fixedly connected to the same second pressure plate 226. A second fixing frame 227 is provided on one side wall of the first fixing frame 210. A rotating rod 230 is rotatably connected to one side wall of the second fixing frame 227. A fourth gear 231 is provided on the outer side wall of the rotating rod 230. A second electric... The output end of the second motor 217 is provided with a sixth electric telescopic rod 228. The telescopic end of the sixth electric telescopic rod 228 is rotatably connected to a third gear 229. The other end of the rotating rod 230 passes through the first fixed frame 210 and is fixedly connected to one side wall of the positioning cylinder 211. The two side walls of the positioning cylinder 211 are fixedly connected with first electric telescopic rods 212. The telescopic ends of the two first electric telescopic rods 212 are provided with first clamping plates 213. The two ends of the inner side wall of the positioning cylinder 211 are provided with multiple elastic components 214. The multiple elastic components 214 are provided with the same positioning frame 215. The side wall of the positioning frame 215 is rotatably connected with multiple rollers 216.

[0032] Specifically, the elastic component 214 pushes the positioning frame 215 to retract towards the center. Multiple rollers 216 on the positioning frame 215 contact the outer wall of the central vertical tube to achieve automatic centering guidance. The fourth electric telescopic rod 223 extends to push the first pressure plate 224 to press one end of the bottom of the central vertical tube. The fifth electric telescopic rod 225 extends to push the second pressure plate 226 to press the other end of the bottom of the central vertical tube, restricting axial movement. Subsequently, the first electric telescopic rods 212 on both sides of the positioning cylinder 211 extend to push the first clamping plate 213 to simultaneously clamp the outer wall of the central vertical tube, restricting radial swaying. Simultaneously, the second electric telescopic rod 219 extends to push the first clamping rod 220 into the central hole at the bottom of the central vertical tube. The third electric telescopic rod 221 extends to push the second clamping rod 222 outwards, tightening... The inner wall of the central hole of the central vertical pipe forms an internal support to prevent deformation, thereby fixing the central vertical pipe. Then, the sixth electric telescopic rod 228 extends, causing the third gear 229 to mesh with the fourth gear 231. The second motor 217 starts and drives the sixth electric telescopic rod 228 and the third gear 229 to rotate, thereby causing the fourth gear 231 to rotate. The rotating rod 230 drives the positioning cylinder 211 to rotate, so that the welding port of the central vertical pipe is vertically downward. The second motor 217 starts and stops running. Then, the sixth electric telescopic rod 228 retracts, causing the third gear 229 to mesh with the second gear 29. The second motor 217 starts again, adjusting the rotation angle of the central vertical pipe so that the welding port of the central vertical pipe is above the slag outlet 12. The second motor 217 stops running.

[0033] In this embodiment, the grinding mechanism 5 includes two eleventh electric telescopic rods 51 fixedly connected to the side wall of the slag outlet 12. The telescopic ends of the two eleventh electric telescopic rods 51 are fixedly connected to the same movable chamber 52. A movable bracket 53 is provided on the outer side wall of the movable chamber 52. The top side wall of the movable bracket 53 is slidably connected to the bottom end of the operating table 1. A third electric slide rail 54 is provided on the top side wall of the movable bracket 53. A third electric slider 55 is slidably connected to the inner side wall of the third electric slide rail 54. A second support frame 56 is provided on the top side wall of the third electric slider 55. A fifth motor 57 is provided on one side wall of the second support frame 56. A second rotating block 58 is provided at the output end of the fifth motor 57. The outer side wall of the second rotating block 58 is slidably connected to the inner side wall of the movable chamber 52. A grinding component 59 is provided on the top side wall of the second rotating block 58.

[0034] Specifically, the eleventh electric telescopic rod 51 extends to push the moving chamber 52 and the grinding component 59 closer to the weld. The moving bracket 53 slides along the bottom of the operating table 1 to maintain stability. At the same time, the fifth motor 57 starts to drive the second rotating block 58 to rotate, unfolding the grinding component 59. The third electric slide rail 54 drives the third electric slider 55 to move, causing the second support frame 56, the fifth motor 57, and the grinding component 59 to finely adjust their positions so that the grinding head is aligned with the edge seam at the welding port. The grinding component 59 rotates to grind the edge seam at the welding port to remove burrs and oxide layers, and to make the edge seam at the welding port have the same inclined interface as the main beam pipe welding port. After grinding is completed, the grinding component 59 stops running, and the eleventh electric telescopic rod 51 retracts, causing the moving chamber 52 and the grinding component 59 to return to their initial positions.

[0035] In this embodiment, the guiding mechanism 3 includes multiple ninth electric telescopic rods 311 fixedly connected to the top side wall of the operating platform 1. The telescopic ends of the ninth electric telescopic rods 311 are fixedly connected to the same third fixed frame 31. Two rollers 33 are symmetrically rotatably connected to the side walls of the two third fixed frames 31 at opposite ends. The outer walls of the two rollers 33 are rotatably connected to the same conveyor belt 34. A third motor 32 is fixedly connected to one side wall of one of the third fixed frames 31. The output end of the third motor 32 passes through the side wall of the third fixed frame 31 and one of the rollers 33. One end is fixedly connected to a conveyor belt 34. Multiple first support frames 35 are fixedly connected to the outer wall of the conveyor belt 34. A movable plate 36 is slidably connected to the top side wall of the first support frame 35. An eighth electric telescopic rod 310 is fixedly connected to the outer side wall of the first support frame 35. The telescopic end of the eighth electric telescopic rod 310 passes through the first support frame 35 and is fixedly connected to the side wall of the movable plate 36. A positioning post 37 is provided on the top side wall of the movable plate 36. Multiple seventh electric telescopic rods 38 are provided on the outer side wall of the positioning post 37. A third clamping plate 39 is provided at the telescopic end of each of the multiple seventh electric telescopic rods 38.

[0036] Specifically, the ninth electric telescopic rod 311 extends and retracts, driving the third fixed frame 31 to raise and lower, adjusting the height of the main beam tube so that it is at the same center height as the welding port of the central vertical tube. The operator places the main beam tube on the positioning column 37, the seventh electric telescopic rod 38 extends and pushes the third clamping plate 39 to clamp the inner wall of the main beam tube, the third motor 32 starts and drives the roller 33 to rotate, the roller 33 drives the conveyor belt 34 to move, driving the first support frame 35 and the main beam tube as a whole to move to the nearest position of the welding station and then stop running.

[0037] In this embodiment, the welding machine mechanism 4 includes two fixed blocks 41 on the top side wall of the operating table 1. Each fixed block 41 has a rotating plate 42 on its top side wall. A first rotating block 43 is rotatably connected to the inner side wall of the rotating plate 42. A fourth motor 410 is provided on the side wall of one of the rotating plates 42. The output end of the fourth motor 410 is fixedly connected to the side wall of one of the first rotating blocks 43. A tenth electric telescopic rod 44 is provided on the side wall of each of the two first rotating blocks 43. The telescopic ends of the two tenth electric telescopic rods 44 are provided with the same annular frame 45. A second electric slide rail 46 is provided on the inner side wall of the annular frame 45. A second electric slider 47 is slidably connected to the inner side wall of the second electric slide rail 46. A rotating arm 48 is provided on the bottom side wall of the second electric slider 47. A welding gun 49 is fixedly connected to the bottom side wall of the rotating arm 48.

[0038] Specifically, the eighth electric telescopic rod 310 extends and pushes the moving plate 36 to move laterally, causing the main beam tube to move towards the welding point, so that the welding end face of the main beam tube is precisely aligned with the side wall of the welding end face of the central vertical tube. Subsequently, the fourth motor 410 starts and drives the first rotating block 43 to rotate, causing the tenth electric telescopic rod 44 to rotate 90 degrees. At the same time, the tenth electric telescopic rod 44 starts and pushes the ring frame 45 closer to the weld between the welding end face of the main beam tube and the weld of the central vertical tube. Then, the second electric slider 47 moves along the second electric slide rail 46 to the welding starting point. The rotating arm 48 adjusts the angle and length so that the welding gun 49 is aligned with the center of the weld. The welding gun 49 starts arc welding. The second electric slider 47 drives the rotating arm 48 and the welding gun 49 to make a circular motion along the ring frame 45 to complete the full circumference welding.

[0039] It should be noted that this invention is a frame welding device for a unicycle. The user places the main beam tube sleeve outside the positioning post 37 of the guide mechanism 3. Then, the two central vertical tubes are respectively placed into the two positioning cylinders 211 of the fixing mechanism 2, with the welding ends of the central vertical tubes facing the welding direction. The elastic component 214 pushes the positioning frame 215 to retract towards the center. The multiple rollers 216 on the positioning frame 215 contact the outer wall of the central vertical tube to achieve automatic centering guidance. The fourth electric telescopic rod 223 extends to push the first pressure plate 224 to press one end of the bottom of the central vertical tube. The fifth electric telescopic rod 225 extends to push the second pressure plate 226 to press the other end of the bottom of the central vertical tube, restricting axial movement. Subsequently, the first electric telescopic rods 212 on both sides of the positioning cylinder 211 extend to push the first clamping plate 213 to simultaneously clamp the outer wall of the central vertical tube to restrict radial swaying. At the same time, the second electric telescopic rod 219 extends to push the first clamping plate 213 to simultaneously clamp the outer wall of the central vertical tube to restrict radial swaying. The fixing rod 220 is inserted into the center hole at the bottom of the central vertical pipe. The third electric telescopic rod 221 extends and pushes the second clamping rod 222 outward to expand and press against the inner wall of the center hole of the central vertical pipe to form an inner support to prevent deformation, thereby fixing the central vertical pipe. Then, the sixth electric telescopic rod 228 extends, so that the third gear 229 and the fourth gear 231 mesh. The second motor 217 starts and drives the sixth electric telescopic rod 228 and the third gear 229 to rotate, so that the fourth gear 231 rotates. The rotating rod 230 drives the positioning cylinder 211 to rotate, so that the welding port of the central vertical pipe is vertically downward. The second motor 217 starts and stops running. Then, the sixth electric telescopic rod 228 retracts, so that the third gear 229 and the second gear 29 mesh. The second motor 217 starts again and adjusts the rotation angle of the central vertical pipe so that the welding port of the central vertical pipe is above the slag outlet 12. The second motor 217 stops running.

[0040] The eleventh electric telescopic rod 51 extends, pushing the moving chamber 52 and the grinding assembly 59 closer to the weld. The moving bracket 53 slides along the bottom of the operating table 1 to maintain stability. At the same time, the fifth motor 57 starts, driving the second rotating block 58 to rotate, unfolding the grinding assembly 59. The third electric slide rail 54 drives the third electric slider 55 to move, causing the second support frame 56, the fifth motor 57, and the grinding assembly 59 to finely adjust their positions so that the grinding head is aligned with the edge seam at the weld port. The grinding assembly 59 rotates to grind the edge seam at the weld port to remove burrs and oxide layers, and to make the edge seam at the weld port have the same inclined interface as the main beam pipe weld. After grinding is completed, the grinding assembly 59 stops operating, and the eleventh electric telescopic rod 51 retracts, driving the moving chamber 52 and the grinding assembly 59 closer to the weld. The grinding assembly 59 returns to its initial position. The slag generated from welding and grinding falls into the slag collection box 13 through the slag outlet 12 of the operating table 1 under the action of gravity. Then, the second motor 217 and the sixth electric telescopic rod 228 are restarted, so that the central vertical tube returns to the vertical position. Then, the first motor 21 starts and drives the bidirectional threaded rod 22 to rotate. The bidirectional threaded rod 22 is synchronously driven by the first gear 23 and the transmission chain 24. The moving block 25 moves along the bidirectional threaded rod 22 and drives the central vertical tube to the welding reference position. Then, the sixth electric telescopic rod 228 retracts, so that the third gear 229 and the second gear 29 mesh again. The second motor 217 is restarted, so that the welding ports of the two central vertical tubes are erected in opposite directions.

[0041] The ninth electric telescopic rod 311 extends and retracts, driving the third fixed frame 31 to raise and lower, adjusting the height of the main beam tube so that it is at the same center height as the welding port of the central vertical tube. The operator places the main beam tube on the positioning column 37. The seventh electric telescopic rod 38 extends and pushes the third clamping plate 39 to clamp the inner wall of the main beam tube. The third motor 32 starts and drives the roller 33 to rotate. The roller 33 drives the conveyor belt 34 to move, causing the first support frame 35 and the main beam tube as a whole to move to the welding position and then stop. Subsequently, the eighth electric telescopic rod 310 extends and retracts, pushing the moving plate 36 to move laterally, causing the main beam tube to move towards the welding point, so that the welding end face of the main beam tube is precisely fitted with the side wall of the welding end face of the central vertical tube. Subsequently, the fourth motor 410 starts and drives the first rotating block 43 to rotate, causing the tenth electric telescopic rod 44 to rotate 90 degrees. At the same time, the tenth electric telescopic rod 44 starts and pushes the ring frame 45 closer to the weld seam between the welding end face of the main beam tube and the central vertical tube. Subsequently, the second electric slider 47 moves along the second electric slide rail 46 to the welding starting point. The rotating arm 48 adjusts its angle and length to align the welding gun 49 with the center of the weld. The welding gun 49 then initiates arc welding. The second electric slider 47 drives the rotating arm 48 and the welding gun 49 to perform a circular motion along the annular frame 45 to complete the full circumference welding. After the outer side welding is completed, the welding gun 49 stops working. Subsequently, the seventh electric telescopic rod 38 retracts the third clamping plate 39 and no longer clamps the inner wall of the main beam tube. Then, the ninth electric telescopic rod 311 extends and retracts, driving the third fixed frame 31 to descend, causing the positioning column 37 to emerge from the inside of the main beam tube. The eighth electric telescopic rod 310 extends and retracts, pulling the moving plate 36 back to its original position. Subsequently, the second electric slider 47 moves again along the second electric slide rail 46. The rotating arm 48 adjusts its angle and length to extend the welding gun 49 into the main beam tube and align it with the center of the inner weld. The welding gun 49 initiates arc welding. After welding is completed, the welding gun 49 stops working and resets. The tenth electric telescopic rod 44 retracts, driving the annular frame 45 back to a safe position. The annular frame 45 and the first rotating block 43 reset.

[0042] After welding is completed, the internal mechanism 2 retracts sequentially to release the clamp on the central vertical tube. Then, the welded and polished unicycle frame is taken out of the welding station. After the operator removes the finished frame, all mechanisms are reset, and the above steps are repeated.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A frame welding device for a wheelbarrow, comprising an operating table (1), characterized in that: The top of the operating table (1) is provided with a fixing mechanism (2) for fixing the central vertical pipe, the top of the operating table (1) is provided with a guiding mechanism (3) for guiding the main beam pipe, the top of the operating table (1) is provided with a welding machine mechanism (4) for welding the skeleton, the top side wall of the operating table (1) is provided with a slag discharge port (12), the side wall of the slag discharge port (12) is provided with a grinding mechanism (5) for pre-welding treatment of the welding port, the bottom side wall of the operating table (1) is provided with a slag collection box (13), and the side wall of the slag collection box (13) is detachably connected with a drawer.

2. The frame welding device for a wheelbarrow according to claim 1, characterized in that: The fixing mechanism (2) includes a first motor (21) fixedly connected to one side wall of the operating table (1). Two bidirectional threaded rods (22) are rotatably connected to the inner side wall of the operating table (1). The output end of the first motor (21) passes through the operating table (1) and is fixedly connected to one end of one of the bidirectional threaded rods (22). The outer side walls of the two bidirectional threaded rods (22) are provided with a first gear (23). The outer side walls of the two first gears (23) are rotatably connected to the same transmission chain (24).

3. The frame welding device for a wheelbarrow according to claim 2, characterized in that: The outer walls of the two bidirectional threaded rods (22) are rotatably connected to moving blocks (25). The top side wall of the moving block (25) is provided with a guide plate (26). The top side wall of the guide plate (26) is provided with a first electric slide rail (27). The inner side wall of the first electric slide rail (27) is slidably connected to a first electric slider (28). The top side wall of the first electric slider (28) is rotatably connected to a second gear (29). The top side wall of the second gear (29) is provided with a first fixing frame (210). The inner side wall of the first fixing frame (210) is rotatably connected to a positioning cylinder (211).

4. The frame welding device for a wheelbarrow according to claim 3, characterized in that: A sleeve (218) is provided on one side wall of the positioning cylinder (211). A second electric telescopic rod (219) is provided on one side wall of the sleeve (218). A first clamping rod (220) is provided at the telescopic end of the second electric telescopic rod (219). A plurality of third electric telescopic rods (221) are provided on the outer side wall of the first clamping rod (220). A second clamping rod (222) is provided at the telescopic end of each of the plurality of third electric telescopic rods (221). Two fourth electric telescopic rods (223) are provided on the side wall of the sleeve (218). The same first pressure plate (224) is provided at the telescopic end of the two fourth electric telescopic rods (223). The inner side wall of the first pressure plate (224) is slidably connected to the outer side wall of the first clamping rod (220). Two fifth electric telescopic rods (225) are provided on the other side wall of the positioning cylinder (211). The same second pressure plate (226) is fixedly connected to the telescopic end of the two fifth electric telescopic rods (225).

5. The frame welding device for a wheelbarrow according to claim 3, characterized in that: A second fixed frame (227) is provided on one side wall of the first fixed frame (210). A rotating rod (230) is rotatably connected to one side wall of the second fixed frame (227). A fourth gear (231) is provided on the outer side wall of the rotating rod (230). A second motor (217) is provided on one side wall of the second fixed frame (227). A sixth electric telescopic rod (228) is provided at the output end of the second motor (217). A third gear (229) is rotatably connected to the telescopic end of the sixth electric telescopic rod (228). The other end of the rotating rod (230) passes through the first fixed frame (210) and is fixedly connected to one side wall of the positioning cylinder (211).

6. The frame welding device for a wheelbarrow according to claim 3, characterized in that: The positioning cylinder (211) is fixedly connected to two side walls with first electric telescopic rods (212), and the telescopic ends of the two first electric telescopic rods (212) are provided with first clamping plates (213). The inner side walls of the positioning cylinder (211) are provided with multiple elastic components (214) at both ends, and the multiple elastic components (214) are provided with the same positioning frame (215). The side walls of the positioning frame (215) are rotatably connected with multiple rollers (216).

7. The frame welding device for a wheelbarrow according to claim 1, characterized in that: The grinding mechanism (5) includes two eleventh electric telescopic rods (51) fixedly connected to the side wall of the slag outlet (12). The telescopic ends of the two eleventh electric telescopic rods (51) are fixedly connected to the same moving chamber (52). The outer side wall of the moving chamber (52) is provided with a moving bracket (53). The top side wall of the moving bracket (53) is slidably connected to the bottom end of the operating table (1). The top side wall of the moving bracket (53) is provided with a third electric slide rail (54). The inner side wall of the third electric slide rail (54) is slidably connected with a third electric slider (55). The top side wall of the third electric slider (55) is provided with a second support frame (56). The side wall of the second support frame (56) is provided with a fifth motor (57). The output end of the fifth motor (57) is provided with a second rotating block (58). The outer side wall of the second rotating block (58) is slidably connected to the inner side wall of the moving chamber (52). The top side wall of the second rotating block (58) is provided with a grinding component (59).

8. The frame welding device for a wheelbarrow according to claim 1, characterized in that: The guiding mechanism (3) includes multiple ninth electric telescopic rods (311) fixedly connected to the top side wall of the operating table (1). The telescopic ends of the ninth electric telescopic rods (311) are fixedly connected to the same third fixed frame (31). The side walls of the two third fixed frames (31) are symmetrically connected to two rollers (33). The outer walls of the two rollers (33) are rotatably connected to the same conveyor belt (34). One side wall of one of the third fixed frames (31) is fixedly connected to a third motor (32). The output end of the third motor (32) passes through the side wall of the third fixed frame (31) and is fixedly connected to one end of one of the rollers (33). The outer wall of the conveyor belt (34) is fixedly connected to multiple first support frames (35).

9. The frame welding device for a wheelbarrow according to claim 8, characterized in that: A movable plate (36) is slidably connected to the top side wall of the first support frame (35), and an eighth electric telescopic rod (310) is fixedly connected to the outer side wall of the first support frame (35). The telescopic end of the eighth electric telescopic rod (310) passes through one end of the first support frame (35) and is fixedly connected to the side wall of the movable plate (36). A positioning post (37) is provided on the top side wall of the movable plate (36), and a plurality of seventh electric telescopic rods (38) are provided on the outer side wall of the positioning post (37). A third clamping plate (39) is provided on the telescopic end of each of the plurality of seventh electric telescopic rods (38).

10. The frame welding device for a wheelbarrow according to claim 1, characterized in that: The welding machine mechanism (4) includes an operating table (1) with two fixed blocks (41) on the top side wall. The top side wall of each of the two fixed blocks (41) is provided with a rotating plate (42). The inner side wall of the rotating plate (42) is rotatably connected to a first rotating block (43). The side wall of one of the rotating plates (42) is provided with a fourth motor (410). The output end of the fourth motor (410) is fixedly connected to the side wall of one of the first rotating blocks (43). The side walls of both first rotating blocks (43) are provided with a tenth electric telescopic rod (44). The telescopic ends of the two tenth electric telescopic rods (44) are provided with the same ring frame (45). The inner side wall of the ring frame (45) is provided with a second electric slide rail (46). The inner side wall of the second electric slide rail (46) is slidably connected to a second electric slider (47). The bottom side wall of the second electric slider (47) is provided with a rotating arm (48). The bottom side wall of the rotating arm (48) is fixedly connected to a welding gun (49).

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