An electric welding device for welding and repairing idler wheels

Abstract

The present invention discloses an electric welding device for welding and repairing an idler wheel in the technical field of welding and repairing idler wheels, including a butt joint plate. A rotating plate is rotatably connected to the top of the butt joint plate. A fixing rod is fixedly connected to the rotating plate. One end of the fixing rod is fixedly connected to a driving block. The present invention adopts a support switching component to adjust the support mode for the butt joint plate through the support switching component, thereby facilitating the area switching of the idler wheel. Directly fixing the butt joint plate from the side will affect the rotation of the fixing rod and the connecting shaft. When directly replacing the idler wheel from the top, the entire rotating plate needs to be removed from the butt joint plate, and reinstalled after replacing the idler wheel. Moreover, such an installation height is relatively high, and a hoisting device needs to be used each time to install the idler wheel. By means of the support switching component to lower the support ring, the idler wheel is installed on the butt joint plate from the bottom, without the need to use a hoisting device or disassemble the rotating plate.

Description

Technical Field

[0001] The present invention relates to the technical field of idler wheel welding repair, and particularly to an electric welding device for welding and repairing idler wheels. Background Art

[0002] An idler wheel refers to a gear that plays a transmission role between two non-contact transmission gears. It meshes with both of these two gears simultaneously to change the rotation direction of the driven gear to be the same as that of the driving gear. Some train wheels also do not directly contact each other and are connected by a transmission rod to rotate synchronously, which can also be called an idler wheel.

[0003] The characteristics of train idler wheels are large volume and heavy mass. Cracks are likely to appear after long-term use. To ensure normal use, it is necessary to regularly inspect train idler wheels and remove the cracked idler wheels for welding repair. Due to the large volume of train idler wheels, it is rather troublesome to fix the idler wheels on the welding repair equipment during welding repair and to replace the idler wheels after welding repair.

[0004] Based on this, the present invention designs an electric welding device for welding and repairing idler wheels to solve the problem that it is rather troublesome to switch idler wheels during welding repair of the above-mentioned train idler wheels. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric welding device for welding and repairing idler wheels to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An electric welding device for welding and repairing idler wheels, including a docking plate. A rotating plate is rotatably connected to the top of the docking plate. A fixed rod is fixedly connected to the rotating plate. One end of the fixed rod is fixedly connected to a driving block. A driving wheel is rotatably connected to the bottom of the driving block. A connecting shaft is fixedly connected to the top of the fixed rod. One end of the connecting shaft is fixedly connected to a welding seat. The connecting shaft, the welding seat, the driving block, and the fixed rod are respectively fixedly connected by bolts. A number of support blocks are arranged at equal intervals at the bottom of the docking plate. A support ring is arranged outside the docking plate. A number of hydraulic rods are fixedly connected to the bottom of the support ring at equal intervals. A support switching assembly is arranged at the bottom of the docking plate. The support switching assembly is used to switch the support of the bottom of the docking plate to facilitate the replacement of the idler wheel on the support ring.

[0007] As a further solution of the present invention, the support switching assembly includes a first connecting rod, one end of the first connecting rod is rotatably connected to the second connecting rod, the first connecting rod and the second connecting rod are rotatably connected in a scissor-like manner, the tops of the first connecting rod and the second connecting rod are rotatably connected to the bottom of the support block, the bottoms of the first connecting rod and the second connecting rod are respectively rotatably connected to a rotating seat, the two rotating seats are commonly spirally connected to a bidirectional screw rod, the bidirectional screw rod is rotatably connected to a base, the bottom of the support block is fixedly connected to a fixed shaft, and the rotating shafts on the first connecting rod and the second connecting rod are slidably connected to the fixed shaft;

[0008] A plurality of support rods are arranged on the outside of the support ring, a fixed frame is fixedly connected to the top of the support rod, a sliding rod is slidably connected to the inside of the fixed frame, a connecting screw is rotatably connected to the support rod, a connecting plate is spirally connected to the connecting screw, the top of the connecting plate is fixedly connected to the sliding rod, one end of the connecting screw is fixedly connected to the second gear, one end of the bidirectional screw is fixedly connected to the first gear, and the bottom of the support ring is fixedly connected to a fixed rack that can mesh with the first gear and the second gear.

[0009] As a further solution of the present invention, a plurality of connecting blocks equidistantly distributed are fixedly connected to the inner wall of the support ring, a third mortise block is slidably connected inside the connecting block, a second spring for resetting the third mortise block is fixedly connected to the bottom of the third mortise block, a second mortise block having one end fitted with the third mortise block is slidably connected inside the connecting block, a first mortise block having one end capable of fitting with the second mortise block is slidably connected inside the connecting block, one end of the first mortise block is fixedly connected with the first spring for resetting the first mortise block, one end of the third mortise block is fixedly connected with a toggle block, one end of the toggle block passes through the connecting block and is slidably arranged on the outside of the connecting block, a limiting block is arranged at one end of the connecting block, the limiting block slides through the connecting block and is fixedly connected to the first mortise block, a docking groove for docking with the limiting block is provided at the bottom of the docking plate, and a positioning rod is fixedly connected to one side of the hydraulic rod.

[0010] As a further solution of the present invention, a plurality of equally spaced balls are rotatably connected to the top of the support ring.

[0011] As a further solution of the present invention, a sliding sleeve is provided on the welding seat, and the sliding sleeve can adjust the horizontal height on the welding seat.

[0012] As a further solution of the present invention, the plane where the upper end surface of the sliding rod is located is in the same horizontal plane as the plane where the bottom end surface of the docking plate is located, and one side wall of the sliding rod is a smooth inclined wall.

[0013] As a further solution of the present invention, the top end surface of the limit block is an inclined section.

[0014] As a further solution of the present invention, the top of the support ring is a smooth wall, and the driving wheel on the driving block is sleeved with an anti-skid pad with a large friction coefficient.

[0015] As a further solution of the present invention, the outer wall of the sliding rod can be completely fitted with the inner wall of the fixed frame.

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

[0017] The present invention adopts a support switching component, which adjusts the support mode of the docking plate through the support switching component, thereby facilitating the zone switching of the idler wheel. Fixing the docking plate directly from the side will affect the rotation of the fixing rod and the connecting shaft. If the idler wheel is replaced directly from the top, the entire rotating plate needs to be removed from the docking plate, and the idler wheel needs to be reinstalled after replacement. In addition, such an installation height is relatively high, and the idler wheel needs to be installed with the help of lifting equipment each time. The idler wheel is installed on the docking plate from the bottom by lowering the support ring through the support switching component. There is no need to use lifting equipment or disassemble the rotating plate, which can greatly improve the efficiency of idler wheel welding and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the docking plate and its bottom components;

[0020] Figure 3 It is a schematic diagram of the support ring, hydraulic rod and support rod structure;

[0021] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the connecting block.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Docking plate; 2. Rotating plate; 3. Connecting shaft; 4. Welding seat; 5. Driving block; 6. Support block; 7. First connecting rod; 8. Fixed shaft; 9. Second connecting rod; 10. Base; 11. Bidirectional screw; 12. First gear; 13. Docking groove; 14. Support ring; 15. Fixed frame; 16. Sliding rod; 17. Hydraulic rod; 18. Second gear; 19. Fixed rack; 20. Support rod; 21. Connecting screw; 22. Connecting plate; 23. Ball; 24. Limit block; 25. Connecting block; 26. Toggle block; 27. First mortise block; 28. First spring; 29. ​​Second mortise block; 30. Third mortise block; 31. Second spring; 32. Fixed rod; 33. Alignment rod. Embodiment

[0025] Please refer to Figures 1-5 , the present invention provides a technical solution: an electric welding device for welding and repairing an idler wheel, including a docking plate 1, a rotating plate 2 is rotatably connected to the top of the docking plate 1, a fixed rod 32 is fixedly connected to the rotating plate 2, one end of the fixed rod 32 is fixedly connected to a driving block 5, a driving wheel is rotatably connected to the bottom of the driving block 5, a connecting shaft 3 is fixedly connected to the top of the fixed rod 32, a welding seat 4 is fixedly connected to one end of the connecting shaft 3, the connecting shaft 3, the welding seat 4, the driving block 5 and the fixed rod 32 are respectively fixedly connected by bolts, several support blocks 6 are arranged at equal intervals at the bottom of the docking plate 1, a support ring 14 is arranged outside the docking plate 1, several hydraulic rods 17 are fixedly connected to the bottom of the support ring 14 at equal intervals, a support switching component is arranged at the bottom of the docking plate 1, and the support switching component is used to switch the support of the bottom of the docking plate 1 to facilitate the replacement of the idler wheel on the support ring 14;

[0026] When the above solution is put into actual use, when welding and repairing the idler wheel, take out the idler wheel to be welded and repaired, start the hydraulic rod 17 to drive the support ring 14 to move downward. While the hydraulic rod 17 moves downward, the support switching component switches the support effect on the docking plate 1, so that the support at the bottom of the docking plate 1 is disconnected and converted into supporting the bottom of the docking plate 1 from the side. In this way, after the support ring 14 descends in height, there is enough space between the docking plate 1 and the support ring 14. Then place the idler wheel on the top of the support ring 14, and then start the hydraulic rod 17 to drive the support ring 14 to rise. During the rising process, the support switching component switches back to the original support effect again until the support ring 14 is reset. The idler wheel to be welded is sleeved outside the docking plate 1. Install the electric welding equipment on the welding seat 4 and adjust the height to a suitable welding height. Then start the driving block 5 to drive the rotating plate 2 to rotate. During the rotation, start the electric welding equipment to weld and repair the idler wheel. After the welding and repair is completed, repeat the above actions, take off the welded idler wheel and replace the idler wheel to be welded. The purpose of doing this is that directly fixing the docking plate 1 from the side will affect the rotation of the fixed rod 32 and the connecting shaft 3. If the idler wheel is replaced directly from the top, the entire rotating plate 2 needs to be removed from the docking plate 1, and then reinstalled after replacing the idler wheel. Moreover, such an installation height is relatively high, and a hoisting device is required each time to install the idler wheel. By means of the support switching component to lower the support ring 14, the idler wheel is installed on the docking plate 1 from the bottom, without the need to use a hoisting device or disassemble the rotating plate 2, which can greatly improve the efficiency of idler wheel welding and repair.

[0027] As a further solution of the present invention, the support switching component includes a first connecting rod 7, one end of the first connecting rod 7 is rotatably connected to a second connecting rod 9, the first connecting rod 7 and the second connecting rod 9 are rotatably connected in a scissor shape, the tops of the first connecting rod 7 and the second connecting rod 9 are rotatably connected to the bottom of the support block 6, the bottoms of the first connecting rod 7 and the second connecting rod 9 are respectively rotatably connected to a rotating seat, the two rotating seats are jointly screwed with a bidirectional lead screw 11, the bidirectional lead screw 11 is rotatably connected to a base 10, the bottom of the support block 6 is fixedly connected to a fixed shaft 8, and the rotating shafts on the first connecting rod 7 and the second connecting rod 9 are slidably connected to the fixed shaft 8;

[0028] A plurality of support rods 20 are arranged on the outer side of the support ring 14, the tops of the support rods 20 are fixedly connected to a fixed frame 15, a sliding rod 16 is slidably connected inside the fixed frame 15, a connecting lead screw 21 is rotatably connected to the support rod 20, a connecting plate 22 is screwed on the connecting lead screw 21, the top of the connecting plate 22 is fixedly connected to the sliding rod 16, one end of the connecting lead screw 21 is fixedly connected to a second gear 18, one end of the bidirectional lead screw 11 is fixedly connected to a first gear 12, the bottom of the support ring 14 is fixedly connected to a fixed rack 19 capable of meshing with the first gear 12 and the second gear 18, the plane where the upper end surface of the sliding rod 16 is located is in the same horizontal plane as the plane where the bottom end surface of the docking plate 1 is located, and one side wall of the sliding rod 16 is a smooth inclined wall;

[0029] When the above - mentioned solution is put into actual use, when the hydraulic rod 17 drives the support ring 14 to descend, first, the fixed rack 19 will gradually come into contact with the second gear 18, and then mesh with the second gear 18 to drive the second gear 18 to rotate. The rotation of the second gear 18 drives the connecting plate 22 connected to it in a spiral manner to slide, so that the connecting plate 22 pushes the sliding rod 16 to slide inside the fixed frame 15 until the top surface of the sliding rod 16 gradually contacts and continues to slide with the bottom surface of the docking plate 1. After the fixed rack 19 slides to the position where it contacts the first gear 12, it continues to slide and meshes with the first gear 12 to drive the first gear 12 to rotate, causing the first connecting rod 7 on the bidirectional lead screw 11 to slide. Since the threads on both sides of the bidirectional lead screw 11 are opposite, the sliding directions of the two groups of first connecting rods 7 meshing with it on the bidirectional lead screw 11 are also opposite. The fixed shaft 8 is only slidably sleeved on the bidirectional lead screw 11 without the effect of spiral connection. When the first connecting rod 7 slides, the included angle between the first connecting rod 7 and the second connecting rod 9 gradually increases, so that the support block 6 disengages from the bottom of the docking plate 1 until the support ring 14 slides down to the maximum distance. At this time, the support block 6 disengages from between the docking plate 1 and the support ring 14, so that there is no obstruction between the support ring 14 and the support block 6. In this way, the idler wheel can be placed on the support ring 14, and then the hydraulic rod 17 is started to push the support ring 14 to slide upward. At this time, the fixed rack 19 will drive the first gear 12 and the second gear 18 to rotate synchronously. Since the contact length between the sliding rod 16 and the docking plate 1 is relatively long, when the support block 6 does not contact the bottom of the docking plate 1, the sliding rod 16 can support the docking plate 1. Then the support ring 14 resets, and the idler wheel is sleeved on the docking plate 1, and then welding and repair processing can be carried out.

[0030] As a further solution of the present invention, a plurality of connecting blocks 25 are fixedly connected to the inner wall of the support ring 14 at equal intervals. A third tenon - joint block 30 is slidably connected inside the connecting block 25. A second spring 31 for its reset is fixedly connected to the bottom of the third tenon - joint block 30. A second tenon - joint block 29 whose one end fits with the third tenon - joint block 30 is slidably connected inside the connecting block 25. A first tenon - joint block 27 whose one end can fit with the second tenon - joint block 29 is slidably connected inside the connecting block 25. A first spring 28 for its reset is fixedly connected to one end of the first tenon - joint block 27. A toggle block 26 is fixedly connected to one end of the third tenon - joint block 30. One end of the toggle block 26 passes through the connecting block 25 and is slidably arranged outside the connecting block 25. A limiting block 24 is arranged at one end of the connecting block 25. The limiting block 24 slidably passes through the connecting block 25 and is fixedly connected to the first tenon - joint block 27. A docking groove 13 for docking with the limiting block 24 is opened at the bottom of the docking plate 1. A positioning rod 33 is fixedly connected to one side of the hydraulic rod 17;

[0031] When the above scheme is put into practical use, when the support ring 14 slides down, the toggle block 26 will gradually slide to the position in contact with the alignment rod 33, and as the support ring 14 descends, the alignment rod 33 gradually pushes the toggle block 26 to slide upward, and the toggle block 26 will drive the third tenon block 30 to stretch the second spring 31 to slide upward, and the third tenon block 30 will drive the second tenon block 29 on one side to slide, and one end of the second tenon block 29 will push the first tenon block 27 to compress the first spring 28 to slide downward, and the first tenon block 27 will drive The limit block 24 slides downward so that the upper end surface of the limit block 24 does not protrude from the top of the support ring 14, so that the idler wheel can be easily pushed on the top of the support ring 14. Then, when the support ring 14 rises, when the toggle block 26 gradually disengages from the contact with the alignment rod 33, the limit block 24 is reset upward under the elastic force of the first spring 28 and the second spring 31. The limit block 24 is consistent with the outer contour of the docking plate 1, and the idler wheel is pushed to the position where it docks with the docking plate 1, so that the idler wheel can be automatically aligned.

[0032] As a further solution of the present invention, a plurality of equally spaced balls 23 are rotatably connected to the top of the support ring 14;

[0033] When the above solution is put into practical use, the rolling friction of the balls 23 makes the idler wheel move on the support ring 14 with less friction and more convenient.

[0034] As a further solution of the present invention, a sliding sleeve is provided on the welding seat 4, and the sliding sleeve can adjust the horizontal height on the welding seat 4;

[0035] When the above solution is put into actual use, it is more convenient to adjust the position of the welding equipment and more convenient to use.

[0036] As a further solution of the present invention, the top end surface of the limit block 24 is an inclined section;

[0037] When the above solution is put into practical use, when the limit block 24 positions the idler wheel when rising, the idler wheel can be better positioned and the position of the idler wheel can be effectively limited.

[0038] As a further solution of the present invention, the top of the support ring 14 is a smooth wall, and the driving wheel on the driving block 5 is sleeved with an anti-skid pad with a large friction coefficient;

[0039] When the above solution is put into actual use, the friction force is increased by the anti-skid pad, so that the driving block 5 can rotate on the supporting ring 14 more conveniently.

[0040] As a further solution of the present invention, the outer wall of the sliding rod 16 can be completely fitted with the inner wall of the fixed frame 15;

[0041] When the above solution is put into actual use, they fit together perfectly so that the sliding rod 16 will not shake when sliding.

[0042] Working principle: When the hydraulic rod 17 drives the support ring 14 to descend, first, the fixed rack 19 will gradually contact the second gear 18, and then mesh with the second gear 18 to drive the second gear 18 to rotate. The rotation of the second gear 18 drives the connecting plate 22 connected to it in a spiral manner to slide, so that the connecting plate 22 pushes the sliding rod 16 to slide inside the fixed frame 15 until the top surface of the sliding rod 16 gradually contacts the bottom surface of the docking plate 1 and continues to slide. After the fixed rack 19 slides to the position where it contacts the first gear 12, it continues to slide and meshes with the first gear 12 to drive the first gear 12 to rotate, causing the first connecting rod 7 on the bidirectional lead screw 11 to slide. Since the threads on both sides of the bidirectional lead screw 11 are opposite, the sliding directions of the two groups of first connecting rods 7 meshing with it on the bidirectional lead screw 11 are also opposite. The fixed shaft 8 is only slidably sleeved on the bidirectional lead screw 11 without the effect of spiral connection. In this way, when the first connecting rod 7 slides, the included angle between the first connecting rod 7 and the second connecting rod 9 gradually increases, so that the support block 6 disengages from the bottom of the docking plate 1 until the support ring 14 slides down to the maximum distance. At this time, the support block 6 disengages from between the docking plate 1 and the support ring 14, so that there is no obstruction between the support ring 14 and the support block 6. In this way, the idler wheel can be placed on the support ring 14, and then the hydraulic rod 17 is started to push the support ring 14 to slide upward. At this time, the fixed rack 19 will drive the first gear 12 and the second gear 18 to rotate synchronously. Since the contact length between the sliding rod 16 and the docking plate 1 is relatively long, the sliding rod 16 can support the docking plate 1 before the support block 6 contacts the bottom of the docking plate 1. Then the support ring 14 resets, and the idler wheel is sleeved on the docking plate 1;

[0043] When the support ring 14 slides down, the toggle block 26 will gradually slide to the position in contact with the alignment rod 33, and as the support ring 14 descends, the alignment rod 33 gradually pushes the toggle block 26 to slide upward, and the toggle block 26 will drive the third mortise block 30 to stretch the second spring 31 to slide upward, and the third mortise block 30 will drive the second mortise block 29 on one side to slide, and one end of the second mortise block 29 will push the first mortise block 27 to compress the first spring 28 to slide downward, and the first mortise block 27 will simultaneously drive the limit block 24 to slide downward, so that the upper end surface of the limit block 24 will not protrude from the top of the support ring 14, so that the idler wheel can be easily pushed on the top of the support ring 14, and then When the support ring 14 rises, when the toggle block 26 gradually breaks away from the contact with the alignment rod 33, under the elastic force of the first spring 28 and the second spring 31, the limit block 24 is reset upward, and the limit block 24 is consistent with the outer contour of the docking plate 1, which will push the idler wheel to the position where it docks with the docking plate 1, so that the idler wheel can be automatically aligned. Then the welding equipment is installed on the welding seat 4, and the height is adjusted to a suitable welding height. Then the driving block 5 is started to drive the rotating plate 2 to rotate. During the rotation, the welding equipment is started to weld the idler wheel. After the welding is completed, repeat the above actions, remove the idler wheel that has been welded and replace it with the idler wheel to be welded.

Claims

1. An electric welding device for welding and repairing an idler wheel, comprising a butt joint plate (1). A rotating plate (2) is rotatably connected to the top of the butt joint plate (1). A fixed rod (32) is fixedly connected to the rotating plate (2). A driving block (5) is fixedly connected to one end of the fixed rod (32). A driving wheel is rotatably connected to the bottom of the driving block (5). A connecting shaft (3) is fixedly connected to the top of the fixed rod (32). A welding seat (4) is fixedly connected to one end of the connecting shaft (3). A plurality of support blocks (6) are arranged at equal intervals at the bottom of the butt joint plate (1). Characterized in that: A support ring (14) is arranged on the outside of the butt joint plate (1). A plurality of hydraulic rods (17) are fixedly connected to the bottom of the support ring (14) at equal intervals. A support switching assembly is arranged at the bottom of the butt joint plate (1). The support switching assembly is used to switch the support of the bottom of the butt joint plate (1) to facilitate the replacement of the idler wheel on the support ring (14). The support switching assembly includes a first connecting rod (7). A second connecting rod (9) is rotatably connected to one end of the first connecting rod (7). The first connecting rod (7) and the second connecting rod (9) are rotatably connected in a scissor shape. The tops of the first connecting rod (7) and the second connecting rod (9) are rotatably connected to the bottom of the support block (6). Rotating seats are respectively rotatably connected to the bottoms of the first connecting rod (7) and the second connecting rod (9). A bidirectional lead screw (11) is commonly screwed to the two rotating seats. A base (10) is rotatably connected to the bidirectional lead screw (11). A fixed shaft (8) is fixedly connected to the bottom of the support block (6). The rotating shafts on the first connecting rod (7) and the second connecting rod (9) are slidably connected to the fixed shaft (8). A plurality of support rods (20) are arranged on the outside of the support ring (14). A fixed frame (15) is fixedly connected to the top of the support rod (20). A sliding rod (16) is slidably connected inside the fixed frame (15). A connecting lead screw (21) is rotatably connected to the support rod (20). A connecting plate (22) is screwed to the connecting lead screw (21). The top of the connecting plate (22) is fixedly connected to the sliding rod (16). A second gear (18) is fixedly connected to one end of the connecting lead screw (21). A first gear (12) is fixedly connected to one end of the bidirectional lead screw (11). A fixed rack (19) capable of meshing with the first gear (12) and the second gear (18) is fixedly connected to the bottom of the support ring (14).

2. The electric welding device for welding and repairing an idler wheel according to claim 1, Characterized in that: A plurality of connection blocks (25) are fixedly connected to the inner wall of the support ring (14) and are distributed at equal intervals. A third tenon block (30) is slidably connected inside the connection block (25). A second spring (31) for resetting the third tenon block (30) is fixedly connected to the bottom of the third tenon block (30). A second tenon block (29) having one end that fits with the third tenon block (30) is slidably connected inside the connection block (25). A first tenon block (27) having one end that can fit with the second tenon block (29) is slidably connected inside the connection block (25). One end of the first tenon block (27) is fixedly connected to the A first spring (28) is provided for resetting the third mortise block (30); one end of the third mortise block (30) is fixedly connected to a toggle block (26); one end of the toggle block (26) passes through the connection block (25) and is slidably arranged on the outside of the connection block (25); one end of the connection block (25) is provided with a limit block (24); the limit block (24) slides through the connection block (25) and is fixedly connected to the first mortise block (27); a docking groove (13) for docking with the limit block (24) is provided at the bottom of the docking plate (1); and a positioning rod (33) is fixedly connected to one side of the hydraulic rod (17).

3. An electric welding device for welding and repairing an idler wheel according to claim 1, Features: The top of the support ring (14) is rotatably connected to a plurality of equally spaced balls (23).

4. An electric welding device for welding and repairing an idler wheel according to claim 1, Features: The welding seat (4) is provided with a sliding sleeve, and the sliding sleeve can adjust the horizontal height on the welding seat (4).

5. An electric welding device for welding and repairing an idler wheel according to claim 1, Features: The plane where the upper end surface of the sliding rod (16) is located is in the same horizontal plane as the plane where the bottom end surface of the docking plate (1) is located, and one side wall of the sliding rod (16) is a smooth inclined wall.

6. An electric welding device for welding and repairing an idler wheel according to claim 2, Features: The top end surface of the limiting block (24) is an inclined section surface.

7. An electric welding device for welding and repairing an idler wheel according to claim 1, Features: The top of the support ring (14) is a smooth wall, and the driving wheel on the driving block (5) is sleeved with an anti-skid pad with a large friction coefficient.

8. An electric welding device for welding and repairing an idler wheel according to claim 1, Features: The outer wall of the sliding rod (16) can completely fit with the inner wall of the fixed frame (15).

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