Winding-free infinite rotary welding robot
By using a transmission device and slip ring assembly, the welding torch cable, hot wire cable, and wire feeding mechanism can rotate without tangling, solving the problem that conventional robots cannot achieve without tangling, reducing costs and safety hazards, and improving welding efficiency and adaptability.
Patent Information
- Application Number
- CN202512009856.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-02-10
AI Technical Summary
Conventional 6-axis industrial robots cannot achieve untangled, infinite rotation of welding torch cables, hot wire cables, and wire feeding mechanisms, resulting in high costs, high labor and time consumption, safety hazards, and an inability to weld complex structures.
The system employs a transmission device, a wire feeding device, and a welding torch. Through electric slip rings and water-air slip rings, it achieves unwinding and infinite rotation of the welding torch cable, hot wire cable, and wire feeding mechanism. By utilizing the synchronous movement of the slip ring assembly, it achieves unwinding and infinite rotation of the welding wire.
It enables untangled and infinitely rotating welding torch cable, hot wire cable, and wire feeding mechanism, reducing costs and safety hazards, and improving welding efficiency and adaptability.
Smart Images
Figure CN121491630A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of welding technology, and in particular to a welding robot capable of unwinding and infinite rotation. Background Technology
[0002] When performing internal and external wall cladding welding on various structures such as valves, pipe fittings, gates, heads, flanges, blowout preventers, and wellheads, as well as deep hole internal wall cladding welding, these welded structures require continuous, multi-turn, non-winding rotation of the welding torch and wire feeding mechanism while the workpiece remains stationary. Conventional 6-axis industrial robots cannot achieve non-winding, unlimited rotation of the welding torch cable, hot wire cable, water and electricity supply, and wire feeding mechanism; they can only use an external turntable to reposition and rotate the workpiece. This approach has several drawbacks: it incurs significant costs, requires substantial manpower and time, and the safety hazards associated with workpiece rotation must be carefully considered. Furthermore, some complex structures cannot be repositioned or rotated, making it impossible to achieve welding through workpiece rotation alone. Summary of the Invention
[0003] To address the problems existing in the prior art, the present invention provides a welding robot capable of untangled, infinite rotation. The present invention provides a welding robot capable of unwinding and infinite rotation, employing the following technical solution: A welding robot capable of unlimited rotation without entanglement includes a transmission device, a wire feeding device, and a welding torch. The transmission device includes a mounting plate, a protective shell, an electric slip ring, and a water-air slip ring. The protective shell is mounted on top of the mounting plate, and the electric slip ring and the water-air slip ring are located inside the protective shell. The slip ring includes a first inner slip ring and a first outer slip ring mounted on the inner wall of the protective shell. The first inner slip ring and the first outer slip ring are rotatably connected. The top of the first outer slip ring is provided with an inlet wire, and the bottom of the first inner slip ring is provided with an outlet wire for powering the welding torch and motor. Energy is transferred between the first inner slip ring and the first outer slip ring through slip ring patches. The water-air slip ring includes a second inner slip ring and a second outer slip ring rotatably connected to the second inner slip ring. The top of the second outer slip ring is provided with at least one protective gas inlet and one cooling water inlet. The bottom of the second inner slip ring is provided with a protective gas outlet and a cooling water outlet corresponding to the protective gas inlet and the cooling water inlet. A protective gas connection channel and a cooling water connection channel are provided between the second outer slip ring and the second inner slip ring for the protective gas and cooling water to pass through respectively. A connecting ring is connected between the second inner slip ring and the first inner slip ring. A mounting cover is provided below the mounting plate, and a first drive shaft is fixed below the mounting cover. The welding torch is installed below the first drive shaft. Connecting pipes are provided between the shielding gas outlet, the cooling water outlet, and the welding torch. The wire feeding device is installed on the mounting cover. A drive assembly is provided on the mounting plate to drive the mounting cover and the second inner slip ring to rotate together.
[0004] Optionally, the protective gas connection channel includes a first protective gas channel, a protective gas storage box, and a second protective gas channel. The first protective gas channel is located inside the first outer slip ring, and the second protective gas channel is located inside the second inner slip ring. A receiving cavity is provided on the inner wall of the second outer slip ring, and a first annular block is fixed in the receiving cavity. The two vertically arranged first annular blocks and the outer wall of the second inner slip ring form a protective gas storage cavity. The first protective gas channel, the storage cavity, and the second protective gas channel are connected. Optionally, the cooling water channels include a first cooling water channel, a cooling water storage chamber, and a second cooling water channel. The first cooling water channel is located inside the first outer slip ring, and the second cooling water channel is located inside the second inner slip ring. A second annular block is fixed in the receiving chamber. The outer walls of the two vertically arranged second annular blocks and the second inner slip ring form a cooling water storage chamber. The first cooling water channel, the cooling water storage chamber, and the second cooling water channel are connected.
[0005] Optionally, the drive assembly includes a first motor, a first gear, and a first gear ring. The first motor is fixed above the mounting plate, the output shaft of the first motor passes through the mounting plate and is fixed to the first gear, the first gear ring meshes with the first gear, a bearing is provided below the mounting plate, the outer ring of the bearing is fixed to the bottom of the mounting plate, a connecting ring is fixed to the inner ring of the bearing, the connecting ring is fixed to the first gear ring, a second inner slip ring is connected to the connecting ring, and a mounting cover is fixed below the first gear ring.
[0006] Optionally, a second motor is fixed inside the mounting cover, and a second drive shaft is fixed on the output shaft of the second motor. The first drive shaft is a hollow shaft, and the second drive shaft is located inside the first drive shaft. A first bevel gear is fixed at the bottom of the second drive shaft, and a mounting box is fixed at the bottom of the first drive shaft. A rotating shaft is provided inside the mounting box, and a second bevel gear that meshes with the first bevel gear is fixed on the rotating shaft. Both the first and second bevel gears are located in the mounting box. Rotating plates are provided on both sides of the mounting box. The rotating shaft extends out of the side wall of the mounting box and is fixed to the rotating plate. A third motor is fixed on the side of the rotating plate away from the rotating shaft, and the welding torch is fixed on the output shaft of the third motor.
[0007] Optionally, the device also includes a fixing device, which includes a first connecting plate, a connecting block, and a housing. The housing includes a bottom plate, side plates, and a second connecting plate. Two parallel side plates are fixed to the bottom plate, and the second connecting plate is fixed between the two side plates. The bottom of the second connecting plate is fixed to the bottom plate. The bottom plate is welded to the connecting block, and a fixing plate is fixed to the bottom of the bottom plate by bolts. The first motor and the protective shell are both located in the housing.
[0008] Compared with the prior art, the present invention has the following technical effects: Thanks to the slip ring assembly, the outer pipeline is installed on the outer slip ring and connects to the factory's water, electricity, and gas connection points. The inner pipeline moves synchronously with the inner slip ring, achieving untangled and infinite rotation of the welding torch cable, hot wire cable, and water, electricity, and gas pipelines. The wire feeding device is installed on the mounting cover and moves synchronously with the mounting cover, achieving untangled and infinite rotation of the welding wire. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixing device in this invention; Figure 3 This is a schematic diagram of the transmission device in this invention; Figure 4 This is a schematic diagram of the driving component in this invention; Figure 5 This is a schematic diagram of the second transmission shaft, the first bevel gear, and the second bevel gear in this invention; Figure 6 This is a schematic diagram of the electric slip ring and the water-air slip ring in this invention.
[0010] Explanation of reference numerals in the attached drawings: 1. Fixing device; 11. First connecting plate; 12. Connecting block; 13. Housing; 131. Bottom plate; 132. Side plate; 133. Second connecting plate; 2. Transmission device; 21. Mounting plate; 22. Protective shell; 23. Electric slip ring; 231. First inner slip ring; 232. First outer slip ring; 233. Slip ring patch; 234. Mounting groove; 235. Wire inlet; 236. Wire outlet; 24. Water-air slip ring; 241. Second inner slip ring; 2411. Second protective gas channel; 2412. Protective gas outlet; 2413. Second cooling water channel; 2414. Cooling water outlet; 242. Second outer slip ring; 2421. Protective gas inlet; 2422. 1. Cooling water inlet; 2423. First protective gas passage; 2424. First cooling water passage; 243. Connecting ring; 244. Receiving cavity; 2441. First annular block; 2442. Protective gas storage cavity; 2443. Second annular block; 2444. Cooling water storage cavity; 25. Mounting cover; 26. First drive shaft; 3. Wire feeding device; 31. Welding wire spool; 32. Wire feeder; 4. Welding torch; 5. Drive assembly; 51. First motor; 52. First gear; 53. First gear ring; 54. Bearing; 55. Gearbox; 6. Second drive shaft; 61. First bevel gear; 62. Second bevel gear; 7. Mounting box; 71. Rotating plate; 72. Rotating shaft; 73. Third motor. Detailed Implementation
[0011] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 The present invention will be described in further detail below.
[0012] Reference Figures 1-6 This invention discloses a welding robot capable of non-entanglement and infinite rotation, comprising a fixing device 1, a transmission device 2, a wire feeding device 3, and a welding torch 4. The transmission device 2, the wire feeding device 3, and the welding torch 4 are all mounted on the fixing device 1, which can be mounted on a fixed truss, a movable truss, or other equipment.
[0013] The fixing device 1 includes a first connecting plate 11, a connecting block 12, and a housing 13. The housing 13 includes a bottom plate 131, side plates 132, and a second connecting plate 133. Two parallel side plates 132 are fixed to the bottom plate 131, and the second connecting plate 133 is fixed between the two side plates 132. The bottom of the second connecting plate 133 is fixed to the bottom plate 131. The bottom plate 131 is welded to the connecting block 12. The first connecting plate 11 is connected to a fixed truss or a movable truss by bolts.
[0014] The transmission device 2 includes a mounting plate 21, a slip ring assembly, a mounting cover 25, and a first transmission shaft 26. The mounting plate 21 is fixed to the bottom of the base plate 131 by bolts. The slip ring assembly includes a protective shell 22, an electric slip ring 23, and a water-air slip ring 24. Both the electric slip ring 23 and the water-air slip ring 24 are located inside the protective shell 22, with the water-air slip ring 24 located below the electric slip ring 23.
[0015] The slip ring 23 includes a first inner slip ring 231 and a first outer slip ring 232. The first outer slip ring 232 is fixed to the inner wall of the protective shell 22. The first inner slip ring 231 is located inside the first outer slip ring 232 and is rotatably connected to the first outer slip ring 232. A wire inlet 235 is provided at the top of the first outer slip ring 232, and the wire supplies power to the welding torch 4 and the motor. A wire outlet 236 is provided at the bottom of the first inner slip ring 231. A slip ring patch 233 is provided between the first inner slip ring 231 and the first outer slip ring 232. A mounting groove 234 is provided on the first outer slip ring 232, and the slip ring patch 233 is fixed in the mounting groove 234. Energy is transferred between the first inner slip ring 231 and the first outer slip ring 232 through the slip ring patch 233.
[0016] The water-air slip ring 24 includes a second inner slip ring 241 and a second outer slip ring 242. The second inner slip ring 241 and the second outer slip ring 242 are rotatably connected, and the outer wall of the second outer slip ring 242 is fixed to the inner wall of the protective shell 22. A connecting ring 243 is provided between the second inner slip ring 241 and the first inner slip ring 231, and the second inner slip ring 241 and the first inner slip ring 231 are connected and fixed by the connecting ring 243. The top of the second outer slip ring 242 is provided with multiple protective gas inlets 2421 and multiple cooling water inlets 2422. The interior of the second outer slip ring 242 is provided with a first protective gas channel 2423 and a first cooling water channel 2424. One first protective gas channel 2423 corresponds to one protective gas inlet 2421, and one first cooling water channel 2424 corresponds to one first cooling water channel 2424.
[0017] The inner wall of the second outer slip ring 242 is provided with a receiving cavity 244. The outer wall of the second inner slip ring 241 closes the receiving cavity 244. A first annular block 2441 is provided in the receiving cavity 244. The end of the first protective gas channel 2423 is connected to the receiving cavity 244. Two first annular blocks 2441 are located at the end of the first protective gas channel 2423. The first annular blocks 2441 are fixed on the cavity wall of the receiving cavity 244. The two first annular blocks 2441 and the outer wall of the second inner slip ring 241 form a protective gas storage cavity 2442.
[0018] The second inner slip ring 241 has a second protective gas channel 2411 inside. The bottom of the second inner slip ring 241 has a protective gas outlet 2412 communicating with the second protective gas channel 2411. The end of the second protective gas channel 2411 away from the protective gas outlet 2412 is connected to the protective gas storage chamber 2442. When the second inner slip ring 241 and the first inner slip ring 231 rotate, protective gas enters the first protective gas channel 2423 from the protective gas inlet 2421 on the second outer slip ring 242, and then enters the protective gas storage chamber 2442. When the second inner slip ring 241 rotates, the inlet of the second protective gas channel 2411 remains connected to the protective gas storage chamber 2442, and the protective gas in the protective gas storage chamber 2442 enters the second protective gas channel 2411, finally exiting from the protective gas outlet 2412.
[0019] A second annular block 2443 is also provided inside the receiving cavity 244. Both second annular blocks 2443 are fixed to the cavity wall of the receiving cavity 244. The two second annular blocks 2443 and the outer wall of the second inner slip ring 241 form a cooling water storage cavity 2444. The outlet of the first cooling water pipe is connected to the cooling water storage cavity 2444. A second cooling water channel 2413 is provided inside the second inner slip ring 241. A cooling water outlet 2414 connected to the second cooling water channel 2413 is fixed at the bottom of the second inner slip ring 241. The inlet end of the second cooling water channel 2413 is connected to the cooling water storage cavity 2444. Cooling water in the cooling water storage cavity 2444 flows out through the second cooling water channel 2413. Connecting pipes are provided at both the shielding gas outlet 2412 and the cooling water outlet 2414. The other end of the connecting pipe is connected to the welding torch 4 to provide shielding gas and cooling water for welding. The connecting pipe passes through the inner ring of the bearing 54. An opening is provided on the mounting cover 25. The connecting pipe passes through the opening and is connected to the welding gun.
[0020] The protective shell 22 is fixed to the mounting plate 21 by bolts. The mounting cover 25 is located below the mounting plate 21. The mounting plate 21 is provided with a drive assembly 5 for driving the mounting cover 25 and the second inner slip ring 241 to rotate. The drive assembly 5 includes a first motor 51, a first gear 52, and a first gear ring 53. The first motor 51 is fixed above the mounting plate 21. The output shaft of the first motor 51 passes through the mounting plate 21 and is fixed to the first gear 52. The first gear ring 53 meshes with the first gear 52. A bearing 54 is provided below the mounting plate 21. The outer ring of the bearing 54 is fixed to the bottom of the mounting plate 21. A connecting ring is fixed to the inner ring of the bearing 54. The connecting ring is fixed to the first gear ring 53 and fixedly connected to the second inner slip ring 241.
[0021] A gearbox 55 is fixed to the bottom of the mounting plate 21. The bottom of the gearbox 55 is open, and the first gear 52 and the first gear ring 53 are both located inside the gearbox 55. The mounting cover 25 is located below the gearbox 55 and is fixed to the first gear ring 53. As the first gear ring 53 rotates, the first motor 51 drives the first gear 52 to rotate, the first gear 52 drives the first gear ring 53 to rotate, and the first gear ring 53 drives the mounting cover 25 and the second inner slip ring 241 to rotate.
[0022] A second motor is fixed inside the mounting cover 25. A second drive shaft 6 is fixed to the output shaft of the second motor. The first drive shaft 26 is a hollow shaft, and the second drive shaft 6 is located inside the first drive shaft 26. A first bevel gear 61 is fixed to the bottom of the second drive shaft 6, and a second bevel gear 62 is fixed to the rotating shaft 72. The second bevel gear 62 meshes with the first bevel gear 61. The second motor drives the second drive shaft 6 to rotate, which in turn drives the first bevel gear 61 to rotate. This causes the second bevel gear 62 to drive the rotating shaft 72 to rotate, which in turn causes the third motor 73 and the welding torch 4 to swing back and forth, thereby adjusting the angle of the third motor 73 and the welding torch 4. The power cables of the third motor 73 and the welding torch 4 pass through the inner ring of the bearing 54 and extend out from the opening on the mounting cover 25.
[0023] A mounting box 7 is fixed to the bottom of the first drive shaft 26. Rotating plates 71 are provided on both sides of the mounting box 7. A rotating shaft 72 is installed inside the mounting box 7, extending out of the side wall of the mounting box 7 and fixed to the rotating plates 71. A third motor 73 is fixed to the side of the rotating plate 71 away from the rotating shaft 72. The welding torch 4 is fixed to the output shaft of the third motor 73. The third motor 73 drives the welding torch 4 to rotate at a small angle, adjusting the angle and position of the welding torch 4, without performing circular motion. The wire feeder 32 includes a wire spool 31 and a wire feeder 32. Both the wire spool 31 and the wire feeder 32 are mounted on the side wall of the mounting cover 25. The welding wire on the wire spool 31 is connected to the welding torch 4 after passing through the wire feeder 32.
[0024] The implementation principle of the welding robot of the present invention, which allows for untangled and infinitely rotating welding, is as follows: When the welding torch 4 is performing welding work, the first motor 51 drives the first gear 52 to rotate, the first gear 52 drives the second gear to rotate, and the second gear drives the second inner slip ring 241, the first inner slip ring 231, the mounting cover 25, the first transmission shaft 26, and the welding torch 4 to rotate. Due to the arrangement of the slip ring assembly, the outer pipeline is installed on the outer slip ring and connected to the factory's water, electricity, and gas connection points. The inner pipeline moves synchronously with the inner slip ring, achieving untangled and infinitely rotating welding torch 4 cable, hot wire cable, and water, electricity, and gas pipelines. The wire feeding device 3 is installed on the mounting cover 25 and moves synchronously with the mounting cover 25, achieving untangled and infinitely rotating welding wire.
[0025] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A welding robot capable of unlimited rotation without entanglement, characterized in that: It includes a transmission device (2), a wire feeding device (3) and a welding torch (4). The transmission device (2) includes a mounting plate (21), a protective shell (22), an electric slip ring (23) and a water-air slip ring (24). The protective shell (22) is mounted above the mounting plate (21), and the electric slip ring (23) and the water-air slip ring (24) are located inside the protective shell (22). The slip ring (23) includes a first inner slip ring (231) and a first outer slip ring (232) installed on the inner wall of the protective shell (22). The first inner slip ring (231) and the first outer slip ring (232) are rotatably connected. The top of the first outer slip ring (232) is provided with an inlet wire (235), and the bottom of the first inner slip ring (231) is provided with an outlet wire (236) for powering the welding torch (4) and the motor. Energy is transferred between the first inner slip ring (231) and the first outer slip ring (232) through a slip ring patch (233). The water-air slip ring (24) includes a second inner slip ring (241) and a second outer slip ring (242) rotatably connected to the second inner slip ring (241). The top of the second outer slip ring (242) is provided with at least one protective gas inlet (2421) and a cooling water inlet (2422). The bottom of the second inner slip ring (241) is provided with a protective gas outlet (2412) and a cooling water outlet (2414) corresponding to the protective gas inlet (2421) and the cooling water inlet (2422). A protective gas connection channel and a cooling water connection channel are provided between the second outer slip ring (242) and the second inner slip ring (241) for the protective gas and cooling water to pass through respectively. A connecting ring (243) is connected between the second inner slip ring (241) and the first inner slip ring (231). A mounting cover (25) is provided below the mounting plate (21). A first drive shaft (26) is fixed below the mounting cover (25). The welding torch (4) is installed below the first drive shaft (26). A connecting pipe is provided between the protective gas outlet (2412), the cooling water outlet (2414) and the welding torch (4). The wire feeding device (3) is installed on the mounting cover (25). A drive assembly (5) is provided on the mounting plate (21) to drive the mounting cover (25) and the second inner slip ring (241) to rotate together.
2. The welding robot capable of unlimited rotation without entanglement according to claim 1, characterized in that: The protective gas connection channel includes a first protective gas channel (2423), a protective gas storage cavity (2442), and a second protective gas channel (2411). The first protective gas channel (2423) is located inside the first outer slip ring (232), and the second protective gas channel (2411) is located inside the second inner slip ring (241). A receiving cavity (244) is provided on the inner wall of the second outer slip ring (242). A first annular block (2441) is fixed in the receiving cavity (244). The outer walls of the two vertically arranged first annular blocks (2441) and the second inner slip ring (241) form a protective gas storage cavity (2442). The first protective gas channel (2423), the protective gas storage cavity (2442), and the second protective gas channel (2411) are connected.
3. The welding robot capable of unlimited rotation without entanglement according to claim 2, characterized in that: The cooling water passages include a first cooling water passage (2424), a cooling water storage chamber (2444), and a second cooling water passage (2413). The first cooling water passage (2424) is located inside the first outer slip ring (232), and the second cooling water passage (2413) is located inside the second inner slip ring (241). A second annular block (2443) is fixed in the receiving chamber (244). The outer walls of the two upper and lower second annular blocks (2443) and the second inner slip ring (241) form the cooling water storage chamber (2444). The first cooling water passage (2424), the cooling water storage chamber (2444), and the second cooling water passage (2413) are connected.
4. The welding robot capable of unlimited rotation without entanglement according to claim 1, characterized in that: The drive assembly (5) includes a first motor (51), a first gear (52) and a first gear ring (53). The first motor (51) is fixed above the mounting plate (21). The output shaft of the first motor (51) passes through the mounting plate (21) and is fixed with the first gear (52). The first gear ring (53) meshes with the first gear (52). A bearing (54) is provided below the mounting plate (21). The outer ring of the bearing (54) is fixed to the bottom of the mounting plate (21). A connecting ring is fixed to the inner ring of the bearing (54). The connecting ring is fixed to the first gear ring (53). A second inner slip ring (241) is connected to the connecting ring. The mounting cover (25) is fixed below the first gear ring (53).
5. The welding robot capable of unlimited rotation without entanglement according to claim 1, characterized in that: The second motor is fixed inside the mounting cover (25). The second transmission shaft (6) is fixed on the output shaft of the second motor. The first transmission shaft (26) is a hollow shaft. The second transmission shaft (6) is located inside the first transmission shaft (26). The bottom of the second transmission shaft (6) is fixed with a first bevel gear (61). The bottom of the first transmission shaft (26) is fixed with a mounting box (7). The mounting box (7) is equipped with a rotating shaft (72). The rotating shaft (72) is fixed with a second bevel gear (62) that meshes with the first bevel gear (61). The first bevel gear (61) and the second bevel gear (62) are both located in the mounting box (7). The mounting box (7) is equipped with rotating plates (71) on both sides. The rotating shaft (72) extends out of the side wall of the mounting box (7) and is fixed to the rotating plate (71). The rotating plate (71) is fixed with a third motor (73) on the side away from the rotating shaft (72). The welding torch (4) is fixed on the output shaft of the third motor (73).
6. The welding robot capable of unlimited rotation without entanglement according to claim 1 or 5, characterized in that: The device also includes a fixing device (1), which includes a first connecting plate (11), a connecting block (12), and a housing (13). The housing (13) includes a bottom plate (131), a side plate (132), and a second connecting plate (133). The two parallel side plates (132) are fixed on the bottom plate (131), and the second connecting plate (133) is fixed between the two side plates (132). The bottom of the second connecting plate (133) is fixed on the bottom plate (131). The bottom plate (131) and the connecting block (12) are welded together, and the mounting plate (21) is fixed to the bottom of the bottom plate (131) by bolts. The first motor (51) and the protective shell (22) are both located in the housing (13).