An automated plasma arc welding device for trolley wire harness connections

Abstract

This invention relates to the field of welding equipment technology, specifically to an automated plasma arc welding device for electric vehicle wiring harness connections. The device includes a welding worktable with welding support bars fixedly mounted on it. Symmetrical positioning arc grooves are formed on the welding support bars, and symmetrically fixed at both ends are mating support rods. Mating uprights are fixedly mounted on one side of the welding worktable at both ends of the welding support bars, and mounting through holes are formed on the welding worktable between the mating uprights. A support plate frame is fixedly mounted on one side of the welding worktable, with inclined blocks symmetrically fixed at both ends. The welding support bars on the welding worktable are used to position the wiring harness via the positioning arc grooves. When the welding torch moves downwards, it drives the movable support plate downwards, causing the pressure bar to move downwards and press the wiring harness firmly, thus fixing the wiring harness and ensuring its stability during the welding process.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an automated plasma arc welding device for trolley wire harness connections. Background Technology

[0002] Automated plasma arc welding is a welding method that uses a water-cooled nozzle to confine the electric arc, thereby obtaining a plasma arc with high energy density. Automated plasma arc welding equipment is commonly used for assembling and connecting trolley wiring harnesses. Although existing plasma arc welding equipment can achieve automated welding without the need for manual operation of the welding torch, manual fixing of the wiring harness is still required during welding to ensure accurate positioning and thus guarantee welding quality. However, manual fixing can easily injure the worker's hands due to the high temperature generated during welding. In addition, before welding, the worker needs to flatten the copper wires at the ends of the wiring harness to prevent them from warping and affecting the welding quality. The operation is cumbersome and inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide an automated plasma arc welding device for trolley wiring harness connections to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An automated plasma arc welding device for electric vehicle wiring harness connections includes a welding worktable. Welding support bars are fixedly mounted on the welding worktable. Symmetrical positioning arc grooves are formed on the welding support bars, and symmetrically fixed at both ends of the welding support bars are mating rods. Mating uprights are fixedly mounted on one side of the welding worktable at both ends of the welding support bars. Installation through holes are formed on the welding worktable between the mating uprights. A support plate frame is fixedly mounted on one side of the welding worktable. Inclined blocks are symmetrically fixed at both ends of the support plate frame, and a mounting top plate is fixedly mounted on the upper end of the support plate frame. The mounting top plate is symmetrically fixed at both ends. The system is equipped with a push plate and an electric telescopic rod mounted on the top plate. A bearing plate is fixedly mounted on the lower end of the electric telescopic rod. Connecting plates are symmetrically fixed on both ends of the bearing plate. Connecting carrier plates are symmetrically fixed on the connecting plates. Insertion connecting posts are fixed between the connecting carrier plates. A mounting plate is also fixedly mounted on the connecting plate. The mounting plate has mating insertion holes, and a bearing base plate is fixedly mounted on the lower end of the mounting base plate. The bearing base plate has mating guide holes. A welding torch is fixedly mounted on the lower end of the bearing plate. A convenient positioning mechanism for flattening wire harnesses is mounted on the welding worktable.

[0006] Preferably, the wire harness convenient positioning mechanism includes a drive connecting plate, a movable carrier plate, a push block, a movable locking plate, a U-shaped frame, and a flattening block. The drive connecting plate is symmetrically installed at both ends of the welding support bar, and the drive connecting plate is provided with a mating sliding hole, in which a mating carrier rod is inserted.

[0007] Preferably, a connecting plate is fixedly provided on the drive connecting plate, an insertion channel is provided on the connecting plate, and an inclined driving part is fixedly provided at the upper end of the connecting plate. An inclined channel is provided on the inclined driving part, the inclined channel is connected to the insertion channel, and an insertion connecting post is inserted into the inclined channel. A matching hinge rod is hinged on the drive connecting plate, and a movable carrier plate is hinged at the upper end of the matching hinge rod.

[0008] Preferably, the movable carrier plate has an installation hole, into which a matching upright is inserted. The movable carrier plate also has a bearing through hole, into which a matching rod is inserted. The matching rod is fixedly mounted on the lower pressure bar. The lower end of the lower pressure bar has a lower pressure arc groove, and the lower pressure bar is located at the lower end of the movable carrier plate. A first spring is sleeved on the matching rod.

[0009] Preferably, a push block is mounted on the mounting plate, a connecting rod is fixedly mounted on the push block, the connecting rod is inserted into a mating hole, a second spring is sleeved on the connecting rod, and a mating strip is fixedly mounted on the end of the connecting rod away from the push block.

[0010] Preferably, the mating strip has a fixing hole, and a support strip is fixedly installed on the mating strip, and a cylindrical rod is fixedly installed on the support strip.

[0011] Preferably, the movable locking plate is mounted on the bearing base plate, and a fixed insertion rod is fixedly provided on the movable locking plate. The fixed insertion rod is inserted into the mating guide hole, and when the fixed insertion rod is not inserted into the fixed insertion hole, its upper end face is in contact with the lower end face of the mating strip plate. An elastic connecting piece is welded on the movable locking plate, and the upper end of the elastic connecting piece is fixed on the bearing base plate.

[0012] Preferably, the U-shaped frame has an insertion through hole, and a mating mounting rod is fixedly provided at the lower end of the U-shaped frame. The mating mounting rod is inserted into the mounting through hole, and a third spring is sleeved on the mating mounting rod.

[0013] Preferably, a flattening block is installed on the U-shaped frame, a support rod is fixedly installed on the flattening block, the support rod is inserted into the insertion through hole, and a fourth spring is sleeved on the support rod.

[0014] Preferably, a bearing strip is fixedly provided at one end of the support rod away from the flattening block, and support plates are symmetrically fixed at both ends of the bearing strip. An inclined mating strip is fixedly provided on the support plate, and the inclined mating strip is located on the lower side of the inclined block.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structural design and strong functionality, and has the following advantages:

[0016] 1. A welding support bar is set on the welding workbench. The wire harness is positioned by the positioning arc groove on the welding support bar. When the welding gun moves downward, it will drive the movable carrier plate to move downward, which in turn causes the lower pressure bar to move downward to press the wire harness, thereby fixing the wire harness and ensuring its stability during the welding process. Since the lower pressure bar can move relative to the movable carrier plate, it can adapt to welding wire harnesses of different diameters within a certain range. It has strong adaptability and is simple, convenient and quick to operate.

[0017] 2. When the welding torch moves downwards, it can drive the U-shaped frame downwards, which in turn can drive the flattening block on the U-shaped frame downwards to press on the copper wire at the welding point of the wire harness. This can flatten the copper wire at the welding point without the need for manual flattening, which is convenient and quick. It not only reduces the workload of the staff, but also improves the welding efficiency.

[0018] 3. Furthermore, as the welding torch moves further down, the cylindrical rod pushes the inclined mating strip to move, which in turn moves the flattening block so that it is no longer above the welding point. This allows the welding torch to move down to the welding point for successful welding. After welding, as the welding torch moves up, the push plate unlocks the push block, allowing it to reset under the action of the second spring. This facilitates the next push of the U-shaped frame. The entire process requires minimal manual operation and is very convenient. Attached Figure Description

[0019] Figure 1 A first-person view diagram of the assembly of the welding workbench.

[0020] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0021] Figure 3 A second-view diagram of the assembly of the welding workbench.

[0022] Figure 4 This is a schematic diagram of the assembly of the welding workbench and the push block.

[0023] Figure 5 for Figure 4 Enlarged diagram of point B in the middle.

[0024] Figure 6 This is a first-view structural diagram of the welding workbench.

[0025] Figure 7 for Figure 6 Enlarged diagram of point C in the middle.

[0026] Figure 8 This is a schematic diagram of the welding workbench from a second-view perspective.

[0027] Figure 9 This is a schematic diagram of the assembly of the drive connecting plate and the movable carrier plate.

[0028] Figure 10 This is a schematic diagram of the assembly of the U-shaped frame and the flattening block.

[0029] In the diagram: 1. Welding workbench; 11. Welding support bar; 12. Positioning arc groove; 13. Support rod; 14. Matching upright; 15. Mounting socket; 16. Support plate frame; 17. Inclined block; 18. Mounting top plate; 181. Push-down plate; 19. Electric telescopic rod; 191. Bearing plate; 192. Connecting plate; 193. Connecting plate; 194. Inserting connecting column; 195. Mounting support plate; 196. Matching socket; 197. Bearing base plate; 198. Matching guide hole; 199. Welding torch; 2. Drive connecting plate; 21. Matching sliding hole; 22. Connecting upright; 23. Inserting channel; 24. Inclined drive unit; 25. Inclined passage 26. Hinged rod; 3. Movable carrier plate; 31. Mounting hole; 32. Bearing through hole; 33. Lower pressure strip; 34. Lower pressure arc groove; 35. Hinged rod; 36. First spring; 4. Push block; 41. Connecting rod; 42. Second spring; 43. Hinged strip; 44. Fixed hole; 45. Support strip; 46. Cylindrical rod; 5. Movable locking plate; 51. Fixed rod; 52. Elastic connecting piece; 6. U-shaped frame; 61. Insertion through hole; 62. Hinged mounting rod; 63. Third spring; 7. Flattening block; 71. Supporting carrier rod; 72. Fourth spring; 73. Bearing strip; 74. Supporting carrier plate; 75. Angled mating strip. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 10 The present invention provides a technical solution:

[0032] An automated plasma arc welding device for electric vehicle wiring harness connections includes a welding worktable 1. Welding support bars 11 are fixedly mounted on the welding worktable 1. Positioning arc grooves 12 are symmetrically formed on the welding support bars 11, and mating support rods 13 are symmetrically fixedly mounted at both ends of the welding support bars 11. Mating uprights 14 are fixedly mounted on one side of the welding worktable 1 at both ends of the welding support bars 11. Mounting through holes 15 are formed on the welding worktable 1 between the mating uprights 14. A support plate frame 16 is fixedly mounted on one side of the welding worktable 1. Inclined blocks 17 are symmetrically fixedly mounted at both ends of the support plate frame 16, and a mounting top plate 18 is fixedly mounted at the upper end of the support plate frame 16. Push-down plates 181 are symmetrically fixedly mounted at both ends of the mounting top plate 18. An electric telescopic rod 19 is installed on the top plate 18. A bearing plate 191 is fixedly installed at the lower end of the electric telescopic rod 19. Connecting plates 192 are symmetrically fixed at both ends of the bearing plate 191. Connecting carrier plates 193 are symmetrically fixed on the connecting plates 192. Insertion connecting posts 194 are fixed between the connecting carrier plates 193. A mounting plate 195 is also fixedly installed on the connecting plate 192. A mating insertion hole 196 is opened on the mounting plate 195. A bearing base plate 197 is fixedly installed at the lower end of the mounting base plate 195. A mating guide hole 198 is opened on the bearing base plate 197. A welding torch 199 is fixedly installed at the lower end of the bearing plate 191. A convenient positioning mechanism for flattening wire harnesses is installed on the welding workbench 1.

[0033] The wire harness convenient positioning mechanism includes a drive connecting plate 2, a movable carrier plate 3, a push block 4, a movable locking plate 5, a U-shaped frame 6, and a flattening block 7. The drive connecting plate 2 is symmetrically installed at both ends of the welding support bar 11, and the drive connecting plate 2 is provided with a matching sliding hole 21, in which a matching carrier rod 13 is inserted.

[0034] A connecting plate 22 is fixedly mounted on the drive connecting plate 2. An insertion channel 23 is provided on the connecting plate 22. An inclined driving part 24 is fixedly mounted on the upper end of the connecting plate 22. An inclined channel 25 is provided on the inclined driving part 24. The inclined channel 25 communicates with the insertion channel 23. An insertion connecting post 194 is inserted into the inclined channel 25. A mating hinge rod 26 is hinged on the drive connecting plate 2. A movable carrier plate 3 is hinged to the upper end of the mating hinge rod 26. In addition, the insertion connecting post 194 contacts the inner wall of the inclined channel 25. The width of the inclined channel 25 is equal to that of the insertion channel 23. The inner walls of the inclined channel 25 and the inner walls of the insertion channel 23 are smooth and burr-free.

[0035] The movable carrier plate 3 has an installation hole 31, into which a matching upright 14 is inserted. The movable carrier plate 3 also has a bearing through hole 32, into which a matching rod 35 is inserted. The matching rod 35 is fixedly mounted on the lower pressure strip 33. The lower end of the lower pressure strip 33 has a downward pressing arc groove 34, and the lower pressure strip 33 is located at the lower end of the movable carrier plate 3. A first spring 36 is sleeved on the matching rod 35, and the two ends of the first spring 36 are respectively welded to the lower pressure strip 33 and the lower end surface of the movable carrier plate 3.

[0036] A push block 4 is mounted on the mounting plate 195. A connecting rod 41 is fixedly installed on the push block 4. The connecting rod 41 is inserted into the mating hole 196. A second spring 42 is sleeved on the connecting rod 41. A mating strip 43 is fixedly installed on the end of the connecting rod 41 away from the push block 4. In addition, the two ends of the second spring 42 are respectively welded to the push block 4 and the mounting plate 195.

[0037] The mating strip 43 is provided with a fixing hole 44, and a support strip 45 is fixedly provided on the mating strip 43, and a cylindrical rod 46 is fixedly provided on the support strip 45.

[0038] The movable locking plate 5 is installed on the supporting base plate 197, and a fixed insertion rod 51 is fixedly installed on the movable locking plate 5. The fixed insertion rod 51 is inserted into the mating guide hole 198. When the fixed insertion rod 51 is not inserted into the fixed insertion hole 44, its upper end face is in contact with the lower end face of the mating strip plate 43. An elastic connecting piece 52 is welded on the movable locking plate 5. The upper end of the elastic connecting piece 52 is fixed on the supporting base plate 197. In addition, when the upper end face of the fixed insertion rod 51 is in contact with the lower end face of the mating strip plate 43, the elastic connecting piece 52 is in a stretched state. Before the welding gun 199 moves down, the lower end of the push plate 181 is in contact with the upper end face of the movable locking plate 5.

[0039] The U-shaped frame 6 has an insertion through hole 61, and a mating mounting rod 62 is fixedly installed at the lower end of the U-shaped frame 6. The mating mounting rod 62 is inserted into the mounting through hole 15, and a third spring 63 is sleeved on the mating mounting rod 62. The two ends of the U-shaped frame 6 are respectively located directly below the push block 4, and the two ends of the third spring 63 are respectively welded to the welding workbench 1 and the lower end surface of the U-shaped frame 6.

[0040] A flattening block 7 is installed on the U-shaped frame 6. A support rod 71 is fixedly installed on the flattening block 7. The support rod 71 is inserted into the insertion through hole 61, and a fourth spring 72 is sleeved on the support rod 71.

[0041] A bearing strip 73 is fixedly installed on one end of the support rod 71 away from the flattening block 7. Support plates 74 are symmetrically fixed at both ends of the bearing strip 73. An inclined mating strip 75 is fixedly installed on the support plate 74. The inclined mating strip 75 is located on the lower side of the inclined block 17, and the surface of the inclined mating strip 75 is smooth and burr-free. In addition, the two ends of the fourth spring 72 are respectively welded to the U-shaped frame 6 and the bearing strip 73.

[0042] During wire harness welding, two wire harnesses are placed in the positioning arc groove 12 to position them, ensuring the welding ends of the two wire harnesses overlap. Then, the electric telescopic rod 19 is activated to move the support plate 191 downwards. As the support plate 191 moves downwards, the drive connecting plate 2 moves away from the welding support bar 11 due to the cooperation of the insertion connecting post 194 and the inclined channel 25. This movement of the drive connecting plate 2, in conjunction with the hinge rod 26, moves the movable carrier plate 3 downwards. The downward movement of the movable carrier plate 3 moves the lower pressure bar 33 downwards. As the lower pressure bar 33 presses down, the upper end of the wire harness is inserted into the lower pressure arc groove 34. At this point, the lower pressure bar 33 stops moving downwards. The downward movement of spring 36 compresses the first spring 36, thus exerting a downward pushing force on the lower pressure bar 33. This ensures that the lower pressure bar 33 presses firmly onto the wire harness, guaranteeing its stability and facilitating welding. Since the lower pressure bar 33 is movably connected to the movable carrier plate 3, it can press and fix wire harnesses of different diameters within a certain range, offering strong adaptability. As the carrier plate 191 moves downward, the insertion connecting post 194 moves into the insertion channel 23, maintaining the stability of the movable carrier plate 3. The downward movement of the carrier plate 191 also drives the lower push block 4 downward. Once the wire harness is fixed, the lower end face of the lower push block 4 contacts the upper end of the U-shaped frame 6, at which point the cylindrical rod 46 also contacts the inclined block. When the inclined block 17 contacts the U-shaped frame 6, it pushes the U-shaped frame 6 downward as the downward push block 4 moves. Simultaneously, the inclined block 17 pushes the cylindrical rod 46, causing the downward push block 4 to move towards the support plate 16. As the U-shaped frame 6 moves downward, it also pushes the flattening block 7 downward, pressing it onto the welding point of the wire harness. This flattening action of the flattening block 7 flattens the copper wire at the welding point, eliminating the need for manual flattening. Simultaneously, as the mating plate 43 moves, the fixing rod 51 aligns with the fixing hole 44. Under the action of the elastic connecting piece 52, the movable locking plate 5 moves upward, allowing the fixing rod 51 on the movable locking plate 5 to insert into the fixing hole 44, thus achieving mating. The fixing of plate 43, in turn, fixes the push block 4. At this time, the push block 4 is no longer above the U-shaped frame 6, so the U-shaped frame 6 loses the restraining effect of the push block 4 and moves upward under the action of the third spring 63. As the bearing plate 191 continues to move downward, the cylindrical rod 46 will contact the inclined surface of the inclined mating strip 75. Under the action of the cylindrical rod 46, the inclined mating strip 75 will be pushed to move, which will in turn drive the flattening block 7 to move towards the U-shaped frame 6. This will ensure that the flattening block 7 is no longer above the welding point, so that the welding torch 199 can move smoothly downward to the welding point for easy welding. After welding is completed, the electric telescopic rod 19 is activated to drive the bearing plate 191 upward.Under the action of the fourth spring 72, the flattening block 7 will move in the opposite direction to reset. Additionally, when the connecting post 194 moves into the inclined channel 25, it will drive the connecting plate 2 to move closer to the welding support bar 11. This, in conjunction with the hinge rod 26, will drive the movable carrier plate 3 to move upwards and reset, simultaneously driving the lower pressure bar 33 to move upwards and reset. This allows the wire harness to be released, and the welded wire harness can be removed. As the carrier plate 191 moves upwards, it will drive the movable locking plate 5 upwards, causing the upper surface of the movable locking plate 5 to contact the lower surface of the lower push plate 181. Under the restriction of the lower push plate 181, the movable locking plate 5 cannot move upwards, thus causing the fixed insert rod 51 to retract. When the fixed insertion hole 44 is opened, the push block 4 is unlocked. Then, under the action of the second spring 42, the push block 4 moves towards the bearing plate 191, resetting the push block 4. At this time, the fixed insertion hole 44 and the fixed insertion rod 51 are misaligned, and the upper end face of the fixed insertion rod 51 contacts the lower end face of the mating strip 43, facilitating the next wire harness welding operation. The entire wire harness welding process requires minimal manual operation; simply place the wire harness in the positioning arc groove 12. This is very convenient and quick, eliminating the need for manual wire harness fixing and the manual flattening of the copper wire at the welding end, reducing the workload of workers and improving welding efficiency.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated plasma arc welding device for trolley wiring harness connections, comprising a welding worktable (1), characterized in that: Welding support bars (11) are fixedly installed on the welding workbench (1). Positioning arc grooves (12) are symmetrically opened on the welding support bars (11). Matching support rods (13) are symmetrically fixedly installed at both ends of the welding support bars (11). Matching uprights (14) are fixedly installed on one side of the welding workbench (1) at both ends of the welding support bars (11). Installation through holes (15) are opened on the welding workbench (1) between the matching uprights (14). A support plate frame (16) is fixedly installed on one side of the welding workbench (1). Inclined blocks (17) are symmetrically fixedly installed at both ends of the support plate frame (16). An installation top plate (18) is fixedly installed at the upper end of the support plate frame (16). A push plate (181) is symmetrically fixed at both ends of the mounting plate (18), and an electric telescopic rod (19) is installed on the mounting top plate (18). A bearing plate (191) is fixedly installed at the lower end of the electric telescopic rod (19). A connecting plate (192) is symmetrically fixed at both ends of the bearing plate (191). A connecting carrier plate (193) is symmetrically fixed on the connecting plate (192). A plug-in connecting post (194) is fixedly installed between the connecting carrier plates (193). A mounting support plate (195) is also fixedly installed on the connecting plate (192). A mating insertion hole (196) is opened on the mounting support plate (195), and a bearing bottom plate (197) is fixedly installed at the lower end of the mounting support plate (195). A guide hole (198) is provided on the plate (197). A welding gun (199) is fixedly installed at the lower end of the bearing plate (191). A wire harness convenient positioning mechanism with flattening function is installed on the welding workbench (1). The wire harness convenient positioning mechanism includes a drive connecting plate (2), a movable carrier plate (3), a push block (4), a movable locking plate (5), a U-shaped frame (6), and a flattening block (7). The drive connecting plate (2) is symmetrically installed at both ends of the welding support bar (11). A sliding hole (21) is provided on the drive connecting plate (2). A carrier rod (13) is inserted into the sliding hole (21). A connecting upright plate (22) is fixedly installed on the drive connecting plate (2). An insertion channel (23) is provided, and an inclined drive unit (24) is fixedly provided at the upper end of the connecting plate (22). An inclined channel (25) is provided on the inclined drive unit (24), and the inclined channel (25) communicates with the insertion channel (23). An insertion connecting post (194) is inserted into the inclined channel (25). A mating hinge rod (26) is hinged on the drive connecting plate (2). A movable carrier plate (3) is hinged at the upper end of the mating hinge rod (26). An installation insertion hole (31) is provided on the movable carrier plate (3), and a mating upright rod (14) is inserted into the installation insertion hole (31). A bearing through hole (32) is also provided on the movable carrier plate (3), and a mating insert rod (35) is inserted into the bearing through hole (32).The mating rod (35) is fixedly mounted on the lower pressure bar (33). The lower end of the lower pressure bar (33) is provided with a lower pressure arc groove (34). The lower pressure bar (33) is located at the lower end of the movable carrier plate (3). A first spring (36) is sleeved on the mating rod (35). A push block (4) is mounted on the mounting plate (195). A connecting rod (41) is fixedly mounted on the push block (4). The connecting rod (41) is inserted into the mating hole (196). A second spring (42) is sleeved on the connecting rod (41). A mating strip plate (43) is fixedly mounted on the end of the connecting rod (41) away from the push block (4). A fixed hole (44) is provided on the mating strip plate (43). A support strip plate (45) is fixedly mounted on the mating strip plate (43). A cylindrical rod (46) is fixedly mounted on the support strip plate (45). , 2. The automated plasma arc welding equipment for trolley wire harness connection according to claim 1, characterized in that: The movable locking plate (5) is installed on the supporting base plate (197), and a fixed insertion rod (51) is fixedly provided on the movable locking plate (5). The fixed insertion rod (51) is inserted into the mating guide hole (198), and when the fixed insertion rod (51) is not inserted into the fixed insertion hole (44), its upper end face is in contact with the lower end face of the mating strip plate (43). An elastic connecting piece (52) is welded on the movable locking plate (5), and the upper end of the elastic connecting piece (52) is fixed on the supporting base plate (197).

3. The automated plasma arc welding equipment for trolley wire harness connection according to claim 2, characterized in that: The U-shaped frame (6) has an insertion through hole (61), and a mating mounting rod (62) is fixedly provided at the lower end of the U-shaped frame (6). The mating mounting rod (62) is inserted into the mounting through hole (15), and a third spring (63) is sleeved on the mating mounting rod (62).

4. The automated plasma arc welding equipment for trolley wire harness connection according to claim 3, characterized in that: A flattening block (7) is installed on the U-shaped frame (6), and a support rod (71) is fixedly installed on the flattening block (7). The support rod (71) is inserted into the insertion through hole (61), and a fourth spring (72) is sleeved on the support rod (71).

5. The automated plasma arc welding equipment for trolley wire harness connection according to claim 4, characterized in that: A bearing strip (73) is fixedly provided at one end of the support rod (71) away from the flattening block (7). Support plates (74) are fixedly provided symmetrically at both ends of the bearing strip (73). An inclined mating strip (75) is fixedly provided on the support plate (74). The inclined mating strip (75) is located on the lower side of the inclined block (17).

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