A pole welding positioner for large electric generators and method of using same

Abstract

The application provides a magnetic pole welding positioner for large generators and a use method thereof, and relates to the technical field of magnetic poles of large generators. The magnetic pole welding positioner comprises a main clamping base, a main moving base, a main transmission, a main lifting motor, a vice clamping base, a vice moving base, a vice transmission, a vice lifting motor, a main rotating base, a turnover driving motor, a turnover speed reducer and a main clamping device.

Description

Technical Field

[0001] This invention relates to the field of magnetic pole technology for large generators, and more specifically, to a magnetic pole welding positioner for large generators and its usage method. Background Technology

[0002] The performance and reliability of a generator's magnetic poles directly affect the generator's overall efficiency and lifespan. Their design must comprehensively consider magnetic field strength, heat dissipation conditions, and mechanical strength. Different types of magnetic poles are suitable for specific scenarios (such as hydropower and pumped storage).

[0003] The manufacturing of magnetic poles for large generators often requires welding. Due to the enormous size and complex structure of the magnetic poles in large generators, the magnetic poles of large generators in current technology are generally manufactured by manual hoisting and flipping.

[0004] However, manually hoisting and flipping the equipment for welding is inefficient, labor-intensive, and the magnetic poles are not very stable during manual hoisting and welding, which also makes the operation of workers less safe. Summary of the Invention

[0005] The technical problem to be solved by this invention is how to improve the efficiency and welding stability of the magnetic pole reversal welding process of large generators, and eliminate the problems of high labor intensity and poor safety of manual hoisting and reversal operations.

[0006] To address the aforementioned problems, this invention provides a magnetic pole welding positioner for large generators, comprising: a base, a main moving base, a secondary moving base, a main clamping base, a tilting reducer, a tilting drive motor, a main rotating base, a main clamping device, a secondary clamping base, a secondary rotating base, a secondary clamping device, and a worktable.

[0007] The main moving seat, the worktable, and the auxiliary moving seat are sequentially arranged longitudinally on the base. The base is provided with a first guide rail and a rack, which are parallel to each other longitudinally. Both the main moving seat and the auxiliary moving seat are mounted on the first guide rail, which enables the main moving seat and the auxiliary moving seat to reciprocate longitudinally.

[0008] A main drive motor and a secondary drive motor are respectively installed at the main moving base and the secondary moving base. The main drive motor and the secondary drive motor are respectively connected to the rack and pinion via corresponding transmission gears.

[0009] The main clamping base is disposed at the main moving base, and the secondary clamping base is disposed at the secondary moving base.

[0010] The main clamping base is connected to the main moving seat via a main drive mechanism. The main drive mechanism is driven by a main lifting motor, causing the main clamping base to move up and down relative to the main moving seat.

[0011] The secondary clamping base is connected to the secondary moving seat via a secondary drive mechanism. The secondary drive mechanism is driven by a secondary lifting motor, causing the secondary clamping base to move up and down relative to the secondary moving seat.

[0012] The main rotating seat is rotatably connected to the main clamping base. The tilting drive motor is connected to the tilting reducer, which is connected to the main rotating seat. The main clamping device is located at the main rotating seat. The auxiliary rotating seat is rotatably connected to the auxiliary clamping base, and the auxiliary clamping device is located at the auxiliary rotating seat. The main rotating seat and the auxiliary rotating seat are used to rotate about a longitudinal direction.

[0013] The auxiliary clamping device is arranged opposite to the main clamping device, and the auxiliary clamping device and the main clamping device are used to clamp and fix the two ends of the magnetic poles of the large generator.

[0014] Furthermore, the main moving base includes a base and a double-column structure. The base is disposed on the first guide rail, the main drive motor is mounted on the base, and the double-column structure is fixed on the base.

[0015] The main drive unit includes: a main worm gear reducer, a lead screw shaft, and a main moving nut. The main worm gear reducer is located at the top of the double-column structure and connected to the main drive motor. The lead screw shaft is vertically located between the two columns of the double-column structure. The top end of the lead screw shaft is connected to the main worm gear reducer. The main moving nut is sleeved on the lead screw shaft and connected to the main moving seat. The worm wheel inside the main worm gear reducer is coaxially connected to the lead screw shaft. A self-lubricating thrust bearing is provided at the worm wheel shaft inside the main worm gear reducer. A bearing seat is provided at the top of the double-column structure. A cylindrical roller bearing and a top thrust ball bearing are arranged sequentially from top to bottom in the bearing seat. The cylindrical roller bearing and the top thrust ball bearing are sleeved on the top end of the lead screw shaft and separated by a shoulder. The bottom end of the lead screw shaft is installed at the bottom of the double-column structure through a bushing. The bushing and the bottom end of the lead screw shaft are engaged by a bottom thrust ball bearing.

[0016] The main moving seat and the auxiliary moving seat have the same structure, and the main drive and the auxiliary drive have the same structure.

[0017] Furthermore, the main clamping base is equipped with a nut fixing seat, and the main moving nut has a stepped shaft structure, with the larger end of the main moving nut being engaged below the nut fixing seat.

[0018] The main clamping base is equipped with a nut fixing seat, an anti-rotation bracket, a fall arrestor, and a safety nut. The anti-rotation bracket is detachably connected to the bottom of the nut fixing seat by bolts. The main moving nut is located between the anti-rotation bracket and the nut fixing seat, and the main moving nut is detachably connected to the anti-rotation bracket.

[0019] The fall arrestor is mounted on top of the nut fixing seat. The fall arrestor includes a left arm and a right arm. The tops of the left arm and the right arm have a mating portion protruding towards the middle. The lead screw is located between the left arm and the right arm. The safety nut is sleeved on the lead screw and placed above the main moving nut, and is located between the left arm and the right arm. The mating portion is located above the safety nut.

[0020] The main clamping base is a rectangular plate-shaped structure. Each column of the double-column structure is equipped with a second guide rail, which is arranged vertically. The wide side of the main clamping base is vertically arranged, and one side plate of the main clamping base mates with two of the second guide rails. The nut fixing seat is located on one side plate of the main clamping base and is located near the wide side of the main clamping base.

[0021] The tilting reducer is disposed on one side of the main clamping base, and the tilting reducer is disposed near the other wide side of the main clamping base.

[0022] A transmission reducer is provided between the flipping drive motor and the flipping reducer. The transmission reducer is located on the wide side of the other side of the main clamping base. Both the flipping reducer and the transmission reducer are worm gear reducers.

[0023] Furthermore, the main rotating seat is located on the other side plate of the main clamping base. A toothed slewing bearing is provided between the main rotating seat and the main clamping base. The main clamping base is connected to the inner ring of the toothed slewing bearing, and the main rotating seat is connected to the outer ring of the toothed slewing bearing. An output gear is fixed to the output shaft of the tilting reducer. The output gear meshes with the outer ring gear of the toothed slewing bearing through an intermediate gear for transmission.

[0024] The rotational connection structure between the main rotating seat and the main clamping base is the same as the rotational connection structure between the auxiliary rotating seat and the auxiliary clamping base.

[0025] Furthermore, the main rotating seat includes an upright back plate and two side plates. The outer ring of the toothed slewing bearing is disposed on the back side of the back plate. The two side plates are arranged parallel to each other in front of the back plate. The side plates are C-shaped. A horizontally arranged upper support plate is fixed to the top of the two side plates, and a horizontally arranged lower support plate is fixed to the bottom of the two side plates. The two side plates and the upper support plate form the upper beam of the main rotating seat. The two side plates and the lower support plate form the lower beam of the main rotating seat. The two side plates and the back plate form the vertical beam of the main rotating seat. The lower support plate is disposed on the top surface of the lower beam.

[0026] The lower beam is provided with multiple vertical and horizontal stiffening plates. The vertical stiffening plates are arranged parallel to the back plate and connect the two side upright plates together. The vertical stiffening plates are arranged sequentially along the length of the lower beam. The horizontal stiffening plates are located on the bottom surface of the lower beam and connect the two side upright plates together. The horizontal stiffening plates extend along the length of the lower beam.

[0027] A diagonal stiffener is provided at the upper beam, connecting the two side uprights together. The diagonal stiffener extends along the upper inclined edge of the side upright, which gradually approaches the upper support plate as it moves away from the back plate.

[0028] The inclined stiffener and the plurality of vertical stiffeners are all provided with through holes on their surfaces.

[0029] Furthermore, the main clamping device includes: two horizontal clamping mechanisms and a vertical clamping mechanism. The vertical clamping mechanism is located on the upper beam, and the fixing plate of the vertical clamping mechanism is used to push the magnetic pole downward. The two horizontal clamping mechanisms are arranged opposite to each other on the lower beam, and the lateral pushing tops of the two horizontal clamping mechanisms are used to push and clamp the magnetic pole from the left and right sides.

[0030] The main rotating seat and the auxiliary rotating seat have the same structure, and the main clamping device and the auxiliary clamping device have the same structure.

[0031] Furthermore, the vertical clamping mechanism includes a hydraulic cylinder mechanism and a guide column. The hydraulic cylinder mechanism is fixed to the upper support plate. The piston rod of the hydraulic cylinder mechanism passes through the upper support plate from top to bottom and is connected to the fixed plate. The fixed plate is horizontally arranged. The bottom profile of the cross-section of the fixed plate is an inverted V shape. The cross-section of the fixed plate is perpendicular to the axis of the main rotating seat. The guide column stands vertically on the top surface of the fixed plate and is inserted into the upper support plate.

[0032] The horizontal clamping mechanism includes: a horizontal support, a pusher motor, a pusher screw, and a horizontal guide rail.

[0033] Each of the transverse supports is inserted into one of the side uprights at the lower beam. The pusher motor is disposed within the transverse support. The pusher screw is disposed within the transverse support and connected to the pusher motor. The pusher screw extends laterally and is connected to the transverse pusher head via a screw drive. A transverse guide rail is disposed on the transverse support, parallel to the pusher screw. The transverse pusher head is disposed on the transverse guide rail and is used for reciprocating along the pusher guide rail.

[0034] The transverse support has an elongated through hole, which is parallel to the push screw. The push screw is located below the elongated through hole. The bottom end of the transverse push screw has a downwardly protruding limiting protrusion, which is located in the elongated through hole. The push screw passes through the limiting protrusion and engages with it in a helical transmission. The two transverse supports are arranged parallel to each other, with one transverse support positioned above the other.

[0035] Furthermore, the lateral pusher includes: a pad block, a base plate, and a side clamping plate; the pad block is detachably mounted on the pusher guide rail, and the limiting protrusion is mounted on the bottom surface of the pad block; the base plate is detachably mounted on the pad block, and the base plate is a square plate and is horizontally mounted; the top surface of the lower support plate is flush with the top surface of the base plate, and the side clamping plate is vertically mounted in the center of the base plate, the side clamping plate is arranged longitudinally, and the side clamping plate is connected to the base plate.

[0036] Furthermore, the worktable has a cuboid structure, and a plurality of rollers are provided on the top surface of the worktable. The plurality of rollers extend longitudinally and are used to rotate relative to the worktable.

[0037] Vertical limit switches are provided at the upper and lower ends of the double column structure. The vertical limit switches are used to limit the vertical movement range of the main clamping base. Vertical limit switches are provided at the longitudinal ends of the base. The vertical limit switches are used to limit the longitudinal movement range of the main moving seat and the auxiliary moving seat.

[0038] Both the base plate and the fixing plate are made of nylon.

[0039] In addition, the present invention also provides a method for using a positioner, wherein the positioner is the aforementioned magnetic pole welding positioner, and the method of use includes:

[0040] The main moving seat and the auxiliary moving seat are moved away from the worktable along the longitudinal direction, so that the distance between the main moving seat and the auxiliary moving seat is greater than the length of the magnetic pole, the clamping height of the main clamping device and the auxiliary clamping device is consistent with the height of the worktable, and the main clamping device and the auxiliary clamping device are kept in a fully open state.

[0041] The magnetic pole is hoisted above the workbench by a crane, so that the magnetic pole is suspended longitudinally in the center between the main moving seat and the auxiliary moving seat. At this time, the magnetic pole is not in place, but in a suspended state.

[0042] The magnetic pole is lowered, and the distance between the main moving seat and the auxiliary moving seat is adjusted at the same time so that both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device, which are kept in a fully open state. At this time, the magnetic pole is still in a suspended state.

[0043] The crane continues to lower the height of the magnetic pole, and the positions of the sides of the two ends of the magnetic pole relative to the main clamping device and the auxiliary clamping device are adjusted in real time so that the two ends of the magnetic pole fall completely into the main clamping device and the auxiliary clamping device.

[0044] Confirm that the bottom corners at both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device, and place the magnetic pole on the worktable;

[0045] The main clamping device and the auxiliary clamping device clamp and fix the two ends of the magnetic pole along the longitudinal direction, and the main rotating seat and the auxiliary rotating seat are raised synchronously.

[0046] The rotational speed of the flip drive motor is adjusted based on the height difference between the axis of the magnetic pole and the rotation axis of the main and auxiliary rotating seats during the rotation process.

[0047] The technical effects of this invention include at least the following:

[0048] In this invention, the automatic clamping and fixing of the magnetic poles of a large generator, as well as automatic lifting and tilting, are achieved through the coordinated operation of the main moving seat, auxiliary moving seat, main clamping base, tilting reducer, tilting drive motor, main rotating seat, main clamping device, auxiliary clamping base, auxiliary rotating seat, auxiliary clamping device, and worktable. This enables the auxiliary tilting and positioning function for magnetic pole welding, replacing manual hoisting and tilting, improving safety, and saving labor intensity. The main and auxiliary moving seats at both ends of the positioner can move longitudinally to accommodate magnetic poles of different lengths. Furthermore, the main and auxiliary clamping bases allow the positioner to move vertically along the Z-axis, enabling it to cooperate with subsequent welding robots and magnetic poles of different heights for welding operations. The main and auxiliary clamping devices, in conjunction with the worktable, can achieve automatic centering of magnetic poles weighing up to 15 tons, reducing labor intensity.

[0049] Furthermore, by utilizing the main and auxiliary worm gear reducers to provide a large transmission ratio, the main and auxiliary drive motors can perform lifting and lowering operations on the magnetic poles of large generators without requiring high power. The screw shaft and the main and auxiliary moving nuts' helical transmission can achieve a single-stage large reduction ratio, making the transmission ratio more flexible. Moreover, the transmission process is characterized by low noise.

[0050] Furthermore, by utilizing the small size of the main and auxiliary worm gear reducers, lead screw shafts, and main and auxiliary moving nuts, the overall size of the equipment is significantly reduced, avoiding interference with the movement of large magnetic poles during hoisting, thus facilitating the installation and transportation of large magnetic poles. Because the main and auxiliary worm gear reducers, lead screw shafts, and main and auxiliary moving nuts are introduced into this equipment, the axial force on the lead screw shaft is excessive. To ensure the normal operation of the main and auxiliary drives and reduce the wear and tear of their components, top and bottom thrust ball bearings are used to effectively support the lead screw shaft, and cylindrical roller bearings are used at the top of the lead screw shaft to prevent severe wear at the top of the lead screw shaft due to heavy loads during magnetic pole lifting. Simultaneously, bearing housings effectively protect the cylindrical roller bearings and the top thrust ball bearings. To address the issue of the main and auxiliary worm gear reducers being located at the top of a double-column structure, making regular maintenance inconvenient, a self-lubricating thrust bearing is installed inside the main worm gear reducer. Under normal circumstances, no smoothing maintenance is required for this self-lubricating thrust bearing, while also preventing excessive wear of the shafts within the reducer caused by axial forces generated during transmission. This effectively protects both the main and auxiliary transmissions.

[0051] By utilizing worm gear reducers for both the tilting and transmission reducers, the space occupied by these components is minimized, thus reducing their impact on the rotation of the main clamping base. During magnetic pole rotation, the absence of a tilting drive motor and tilting reducer at the secondary clamping base results in significant eccentric force at the main clamping base. To reduce the impact of this eccentric force on the main clamping base and the entire equipment, the lightweight nature of both the tilting drive motor and the tilting reducer (worm gear reducers) significantly reduces the weight of the main clamping base, making it roughly equal to the weight of the secondary clamping base. This minimizes the impact of deflection on the main clamping base and the entire equipment, preventing wear and tear on the magnetic poles at the main clamping base.

[0052] A toothed slewing bearing is installed between the main rotating base and the main clamping base, and a toothed slewing bearing is installed between the auxiliary rotating base and the auxiliary clamping base. The toothed slewing bearing can simultaneously withstand multiple complex forces such as axial force, radial force, overturning moment, and deflection moment, meeting the multi-directional force requirements of the large generator magnetic poles during rotation on the positioner, ensuring stable support of the magnetic poles by the main and auxiliary clamping bases. Furthermore, the gear structure on the outer ring of the toothed slewing bearing meshes with adjacent gears, directly transmitting torque and rotational power, reducing the need for an additional gearbox in traditional transmission systems and simplifying the mechanical structure. In addition, the rolling elements of the toothed slewing bearing, such as steel balls and rollers, and the raceway design ensure low-friction rotation. Combined with the precision of gear meshing, this guarantees accurate adjustment of the rotation angle of the main and auxiliary clamping bases, ensuring the accuracy of the flipping angle. Attached Figure Description

[0053] Figure 1 A schematic perspective view of the magnetic pole welding positioner according to a specific embodiment of the present invention;

[0054] Figure 2 Another schematic perspective view of the magnetic pole welding positioner according to a specific embodiment of the present invention;

[0055] Figure 3 for Figure 1 A magnified schematic diagram of point P in the diagram;

[0056] Figure 4 for Figure 2 Enlarged schematic diagram of point Q in the diagram;

[0057] Figure 5 for Figure 2 Enlarged schematic diagram of point R in the diagram;

[0058] Figure 6 A schematic perspective view of the magnetic pole welding positioner after the magnetic poles are installed, according to a specific embodiment of the present invention;

[0059] Figure 7 This is a schematic flowchart illustrating the method of using the magnetic pole welding positioner described in this invention;

[0060] Reference numerals: 1. Base; 11. First guide rail; 12. Rack; 2. Main moving seat; 21. Main clamping base; 211. Nut fixing seat; 212. Anti-spin bracket; 213. Anti-fall bracket; 214. Safety nut; 22. Tilting reducer; 221. Transmission reducer; 222. Output gear; 223. Intermediate gear; 23. Tilting drive motor; 24. Main rotating seat; 241. Toothed slewing bearing; 242. Back plate; 243. Side upright plate; 244. Upper support plate; 245. Lower support plate; 246. Diagonal rib plate; 25. Main clamping device; 251. Vertical clamping mechanism; 2511. Fixing plate; 2512. Hydraulic cylinder mechanism; 2513. Guide column 252. Horizontal clamping mechanism; 2521. Horizontal push top; 25211. Pad block; 25212. Base plate; 25213. Side clamping plate; 25214. Limiting protrusion; 2522. Horizontal support; 2523. Push top guide rail; 2524. Long strip through hole; 261. Main drive motor; 262. Main lifting motor; 263. Base; 264. Double column structure; 265. Second guide rail; 271. Main worm gear reducer; 272. Lead screw shaft; 273. Main moving nut; 3. Auxiliary moving seat; 31. Auxiliary clamping base; 32. Auxiliary rotating seat; 33. Auxiliary clamping device; 34. Auxiliary drive motor; 35. Auxiliary lifting motor; 4. Worktable; 41. Roller. Detailed Implementation

[0061] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The embodiments of the present invention can be implemented in many ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0062] It is understood that the terms "first," "second," etc., used in this invention may be used to describe various technical terms, but should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. However, unless specifically stated otherwise, these technical terms are not limited to these terms. These terms are only used to distinguish one technical term from another. For example, without departing from the scope of this invention, the first receiving device and the second receiving device are different receiving devices, the first surface and the second surface are different surfaces, and the first plane, the second plane, the third plane, and the fourth plane are different planes. In the description of embodiments of this invention, "a plurality of" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] See Figures 1 to 6 This embodiment provides a magnetic pole welding positioner for large generators, including: a base 1, a main moving base 2, an auxiliary moving base 3, a main clamping base 21, a tilting reducer 22, a tilting drive motor 23, a main rotating base 24, a main clamping device 25, an auxiliary clamping base 311, an auxiliary rotating base 32, an auxiliary clamping device 33, and a worktable 4.

[0064] The main moving seat 2, the worktable 4, and the auxiliary moving seat 3 are arranged sequentially along the longitudinal direction on the base 1. The base 1 is provided with a first guide rail 11 and a rack 12, which are arranged parallel to each other along the longitudinal direction. The main moving seat 2 and the auxiliary moving seat 3 are both mounted on the first guide rail 11, which is used to enable the main moving seat 2 and the auxiliary moving seat 3 to reciprocate along the longitudinal direction.

[0065] A main drive motor 261 and an auxiliary drive motor 34 are respectively installed at the main moving base 2 and the auxiliary moving base 3. The main drive motor 261 and the auxiliary drive motor 34 are respectively connected to the rack and pinion 12 through corresponding transmission gears.

[0066] The main clamping base 21 is located at the main moving base 2, and the secondary clamping base 311 is located at the secondary moving base 3.

[0067] The main clamping base 21 is connected to the main moving base 2 via a main drive mechanism. The main lifting motor 262 drives the main drive mechanism, causing the main clamping base 21 to move up and down relative to the main moving base 2.

[0068] The auxiliary clamping base 311 is connected to the auxiliary moving base 3 via an auxiliary transmission device. The auxiliary lifting motor 35 drives the auxiliary transmission device, causing the auxiliary clamping base 311 to move up and down relative to the auxiliary moving base 3.

[0069] The main rotating seat 24 is rotatably connected to the main clamping base 21. The tilting drive motor 23 is connected to the tilting reducer 22, which is connected to the main rotating seat 24. The main clamping device 25 is located at the main rotating seat 24. The auxiliary rotating seat 32 is rotatably connected to the auxiliary clamping base 311, and the auxiliary clamping device 33 is located at the auxiliary rotating seat 32. The main rotating seat 24 and the auxiliary rotating seat 32 are used for longitudinal rotation.

[0070] The auxiliary clamping device 33 is arranged opposite to the main clamping device 25. The auxiliary clamping device 33 and the main clamping device 25 are used to clamp and fix the two ends of the magnetic poles of the large generator.

[0071] Furthermore, the main moving base 2 includes a base 263 and a double-column structure 264. The base 263 is mounted on the first guide rail 11, the main drive motor 261 is mounted on the base 263, and the double-column structure 264 is fixed on the base 263.

[0072] The main drive unit includes: a main worm gear reducer 271, a lead screw shaft 272, and a main moving nut 273. The main worm gear reducer 271 is mounted on top of the double-column structure 264 and connected to the main drive motor 261. The lead screw shaft 272 is vertically mounted between the two columns of the double-column structure 264, and its top end is connected to the main worm gear reducer 271. The main moving nut 273 is fitted over the lead screw shaft 272 and is connected to the main moving seat 2.

[0073] The worm gear in the main worm gear reducer 271 is coaxially connected to the lead screw shaft 272. A self-lubricating thrust bearing is provided at the worm gear shaft in the main worm gear reducer 271. A bearing seat is provided at the top of the double column structure 264. A cylindrical roller bearing and a top thrust ball bearing are arranged sequentially from top to bottom in the bearing seat. The cylindrical roller bearing and the top thrust ball bearing are sleeved on the top of the lead screw shaft 272. The cylindrical roller bearing and the top thrust ball bearing are separated by a shoulder. The bottom end of the lead screw shaft 272 is installed at the bottom of the double column structure 264 through a bushing. The bushing and the bottom end of the lead screw shaft 272 are engaged by a bottom thrust ball bearing.

[0074] The main moving seat 2 and the auxiliary moving seat 3 have the same structure, and the main drive and the auxiliary drive have the same structure.

[0075] By utilizing the double-column structure 264, the effective support for the magnetic poles can be improved, and the main drive unit can be installed in the gap between the two columns, thus reducing the volume.

[0076] Furthermore, considering the enormous size and weight of the large generator's magnetic poles, strong and effective support is required when hovering. Therefore, the main drive unit employs a main worm gear reducer 271, a lead screw shaft 272, and a main moving nut 273 working together. Utilizing the strong self-locking characteristic of helical transmission, this effectively ensures unidirectional transmission of power output from the main and auxiliary drive motors 34. The main and auxiliary worm gear reducers each form the first layer of self-locking transmission protection. Additionally, the lead screw shaft 272 and the main and auxiliary moving nuts form the second layer of self-locking transmission protection. These two layers of self-locking transmission protection prevent severe overload of the main and auxiliary drive motors 34 and magnetic pole sagging when the driving force of the main and auxiliary drive motors 34 is insufficient, due to excessive magnetic pole weight.

[0077] Furthermore, by utilizing the main and auxiliary worm gear reducers to provide a large transmission ratio, the main and auxiliary drive motors 34 can perform lifting and lowering operations on the magnetic poles of a large generator without requiring high power. Additionally, the screw shaft 272 and the main and auxiliary moving nuts' helical transmission can achieve a single-stage large reduction ratio, making the transmission ratio more flexible. Moreover, the transmission process is characterized by low noise.

[0078] In addition, by taking advantage of the small size of the main and auxiliary worm gear reducers, lead screw shaft 272, and main and auxiliary moving nuts, the overall size of the equipment is reduced significantly, avoiding interference with the movement of large magnetic poles during hoisting, thus facilitating the installation and transportation of large magnetic poles.

[0079] Furthermore, due to the introduction of the main and auxiliary worm gear reducers, lead screw shaft 272, and main and auxiliary moving nuts into the equipment, the axial force on lead screw shaft 272 is excessive. To ensure the normal operation of the main and auxiliary drives and reduce the wear and tear of their components, top and bottom thrust ball bearings are used to effectively support lead screw shaft 272, and cylindrical roller bearings are used at the top of lead screw shaft 272 to prevent severe wear at the top of lead screw shaft 272 due to heavy loads during magnetic pole raising and lowering. Bearing housings are also used to effectively protect the cylindrical roller bearings and the top thrust ball bearing.

[0080] Furthermore, considering that the main and auxiliary worm gear reducers are located at the top of the double-column structure 264, making regular maintenance inconvenient, a self-lubricating thrust bearing is installed inside the main worm gear reducer 271. Under normal circumstances, no smoothing maintenance is required for the self-lubricating thrust bearing, while also preventing excessive wear of the shafts inside the reducer caused by the axial forces generated during the transmission process of the main and auxiliary worm gear reducers. This effectively protects the main and auxiliary transmissions.

[0081] Furthermore, the main clamping base 21 is equipped with a nut fixing seat 211, an anti-spin bracket 212, a fall arrestor 213, and a safety nut 214. The anti-spin bracket 212 is detachably connected to the bottom of the nut fixing seat 211 by bolts. The main moving nut 273 is disposed between the anti-spin bracket 212 and the nut fixing seat 211, and the main moving nut 273 is detachably connected to the anti-spin bracket 212.

[0082] The fall arrestor 213 is located on top of the nut fixing seat 211. The fall arrestor 213 includes a left arm and a right arm. The top of the left arm and the right arm have a mating part protruding towards the middle. The lead screw shaft 272 is located between the left arm and the right arm. The safety nut 214 is sleeved on the lead screw shaft 272 and placed above the main moving nut 273, between the left arm and the right arm. The mating part is placed above the safety nut 214.

[0083] Specifically, the fall arrestor and the main moving nut are connected as a whole by screws on both sides through dimensional matching. The anti-rotation bracket 212 and the main moving nut 273 are connected and fixed by four bolts to prevent the main moving nut 273 from rotating with the lead screw shaft 272.

[0084] A fall arrestor 213 is used to prevent the magnetic pole from stalling and falling in case of accidents. Simultaneously, an anti-rotation bracket 212, in conjunction with a nut fixing seat 211, prevents the main moving nut 273 from rotating with the lead screw shaft 272, ensuring the smooth lifting and lowering of the main clamping base 21. Furthermore, the safety nut 214 further ensures the safety of the main moving nut 273 during rotation relative to the lead screw shaft 272.

[0085] The main clamping base 21 is a rectangular plate-shaped structure. Each column of the double-column structure 264 is provided with a second guide rail 265, which is arranged vertically. The wide side of the main clamping base 21 is vertically arranged. One side plate of the main clamping base 21 mates with the two second guide rails 265. The nut fixing seat 211 is located on one side plate of the main clamping base 21 and is located close to the wide side of one side of the main clamping base 21.

[0086] It should be noted that the secondary clamping base 311 has the same structure as the main clamping base 21. That is, the secondary clamping base 311 is also equipped with a nut fixing seat 211. The structure of the nut fixing seat 211 is the same as that of the main clamping base 21, and it is also equipped with a corresponding anti-rotation bracket 212 and anti-fall bracket 213. The secondary moving nut is also a stepped shaft structure.

[0087] The tilting reducer 22 is mounted on one side of the main clamping base 21, and is positioned near the other wide side of the main clamping base 21.

[0088] A transmission reducer 221 is provided between the tilting drive motor 23 and the tilting reducer 22. The transmission reducer 221 is located on the wide side of the other side of the main clamping base 21. Both the tilting reducer 22 and the transmission reducer 221 are worm gear reducers.

[0089] By utilizing the fact that both the tilting reducer 22 and the transmission reducer 221 are worm gear reducers, the space occupied by the tilting reducer 22 and the transmission reducer 221 is reduced, thus minimizing their impact on the rotation of the main clamping base 21. During the rotation of the magnetic pole, since the auxiliary clamping base 311 does not have components such as the tilting drive motor 23 and the tilting reducer 22, a large eccentric force is generated at the main clamping base 21 during the rotation of the magnetic pole. To reduce the impact of this eccentric force on the deflection of the main clamping base 21 and the entire equipment, the lightweight characteristics of both the tilting drive motor 23 and the tilting reducer 22 as worm gear reducers are utilized to significantly reduce the weight of the main clamping base 21, making the weight of the main clamping base 21 approximately the same as that of the auxiliary clamping base 311. This reduces the deflection impact of the main clamping base 21 and the entire equipment, and prevents the magnetic pole from being affected by wear due to deflection at the main clamping base 21.

[0090] Furthermore, the main rotating seat 24 is located on the other side of the main clamping base 21. A toothed slewing bearing 241 is provided between the main rotating seat 24 and the main clamping base 21. The main clamping base 21 is connected to the inner ring of the toothed slewing bearing 241, and the main rotating seat 24 is connected to the outer ring of the toothed slewing bearing 241. The output shaft of the tilting reducer 22 is fixed with an output gear 222. The output gear 222 meshes with the outer ring gear of the toothed slewing bearing 241 through an intermediate gear 223 for transmission.

[0091] The rotational connection structure between the main rotating seat 24 and the main clamping base 21 is the same as the rotational connection structure between the auxiliary rotating seat 32 and the auxiliary clamping base 311. That is to say, a toothed rotary bearing 241 is also provided between the auxiliary rotating seat 32 and the auxiliary clamping base 311.

[0092] Due to the complex shape and structure of the magnetic poles, the torque experienced by the main and auxiliary clamping bases 311 during rotation is uncertain and uncontrollable. In particular, the main clamping base 21 also bears a deflection torque during rotation. To address this, a toothed slewing bearing 241 is installed between the main rotating seat 24 and the main clamping base 21, and between the auxiliary rotating seat 32 and the auxiliary clamping base 311. The toothed slewing bearing 241 can simultaneously withstand multiple complex forces, including axial force, radial force, overturning torque, and deflection torque, meeting the multi-directional force requirements of the large generator magnetic poles during rotation on the positioner, thus ensuring stable support of the magnetic poles by the main and auxiliary clamping bases 311. Furthermore, the gear structure on the outer ring of the toothed slewing bearing 241 meshes with adjacent gears, directly transmitting torque and rotational power, reducing the need for additional gearboxes in traditional transmission systems and simplifying the mechanical structure. In addition, the rolling elements of the toothed slewing bearing 241, such as steel balls and rollers, and the raceway design ensure low-friction rotation. Combined with the precision of gear meshing, this ensures accurate adjustment of the rotation angle of the main and auxiliary clamping bases 311 and guarantees the accuracy of the flipping angle.

[0093] Furthermore, the main rotating seat 24 includes an upright back plate 242 and two side plates 243. The outer ring of the toothed slewing bearing 241 is disposed on the back of the back plate 242. The two side plates 243 are arranged parallel to each other in front of the back plate 242. The side plates 243 are C-shaped. A horizontally arranged upper support plate 244 is fixed to the top of the two side plates 243, and a horizontally arranged lower support plate 245 is fixed to the bottom of the two side plates 243. The two side plates 243 and the upper support plate 244 form the upper beam of the main rotating seat 24. The two side plates 243 and the lower support plate 245 form the lower beam of the main rotating seat 24. The two side plates 243 and the back plate 242 form the vertical beam of the main rotating seat 24. The lower support plate 245 is disposed on the top surface of the lower beam.

[0094] Multiple vertical and horizontal stiffening slabs are provided at the lower beam. The vertical stiffening slabs are arranged parallel to the back plate 242 and connect the two side upright plates 243 together. The vertical stiffening slabs are arranged sequentially along the length of the lower beam. The horizontal stiffening slabs are located at the bottom surface of the lower beam and connect the two side upright plates 243 together. The horizontal stiffening slabs extend along the length of the lower beam.

[0095] A diagonal stiffening plate 246 is provided at the top beam, which connects the two side upright plates 243 together. The diagonal stiffening plate 246 extends along the upper inclined edge of the side upright plate 243. The upper inclined edge of the side upright plate 243 gradually approaches the upper support plate 244 as it moves away from the back plate 242.

[0096] The inclined stiffener 246 and multiple vertical stiffeners all have through holes on their surfaces.

[0097] The back plate 242 and the two side uprights 243 are spliced ​​together to form the main structure of the main and auxiliary rotating seats 32. This can reduce the weight of the main and auxiliary rotating seats 32, reduce the overall power consumption of the equipment, and reduce the support force of the main and auxiliary clamping bases 311 on the main and auxiliary rotating seats 32 during rotation. This prevents the support strength from being too high, which would cause the support force to be unstable during rotation and cause the magnetic poles to vibrate slightly during the flipping process, thus affecting the welding effect.

[0098] In addition, through holes are provided on the surface of the inclined stiffener 246 and the multiple vertical stiffeners, which can reduce weight, reduce the thermal deformation rate of the inclined stiffener 246 and the multiple vertical stiffeners, and prevent excessive thermal deformation of the inclined stiffener 246 and the multiple vertical stiffeners, which could cause cracks at the connection between the back plate 242 and the two side uprights 243, thus affecting the main structural strength of the main and auxiliary rotating seats 32.

[0099] In addition, the vertical stiffeners, horizontal stiffeners and diagonal stiffeners 246 form an effective structural connection between the two side uprights 243, preventing the main and auxiliary rotating seats 32 from being too hollow and causing vibration during the rotation of the magnetic poles driven by the main and auxiliary rotating seats 32.

[0100] Furthermore, the main clamping device 25 includes: two horizontal clamping mechanisms 252 and a vertical clamping mechanism 251. The vertical clamping mechanism 251 is disposed at the upper beam, and the fixing plate 2511 of the vertical clamping mechanism 251 is used to push the magnetic pole downward. The two horizontal clamping mechanisms 252 are disposed opposite to each other at the lower beam, and the lateral pushing tops 2521 of the two horizontal clamping mechanisms 252 are used to push and clamp the magnetic pole from the left and right sides.

[0101] The main rotating seat 24 and the auxiliary rotating seat 32 have the same structure, and the main clamping device 25 and the auxiliary clamping device 33 have the same structure.

[0102] The magnetic pole ends are clamped by the vertical clamping mechanism 251 and the lower beam, while the magnetic pole is clamped from the side by two horizontal clamping mechanisms 252. In this way, the main and auxiliary clamping devices 33 effectively clamp the two ends of the magnetic pole from the top and bottom and left and right directions, preventing the magnetic pole from swinging laterally during rotation, that is, preventing it from swinging left and right.

[0103] Furthermore, the vertical clamping mechanism 251 includes: a hydraulic cylinder mechanism 2512 and a guide column 2513. The hydraulic cylinder mechanism 2512 is fixed on the upper support plate 244. The piston rod of the hydraulic cylinder mechanism 2512 passes through the upper support plate 244 from top to bottom and is connected to the fixed plate 2511. The fixed plate 2511 is horizontally arranged. The bottom profile of the cross-section of the fixed plate 2511 is an inverted V shape. The cross-section of the fixed plate 2511 is perpendicular to the axis of the main rotating seat 24. The guide column 2513 stands on the top surface of the fixed plate 2511 and is inserted into the upper support plate 244.

[0104] The bottom profile of the cross-section of the fixing plate 2511 is inverted V-shaped, ensuring that the bottom surface of the fixing plate 2511 matches the top surface of the magnetic pole. Combined with the downward forceful push of the fixing plate 2511 by the hydraulic cylinder mechanism 2512, this achieves full clamping and fixation of both ends of the magnetic pole. Guide posts 2513 ensure that the fixing plate 2511 is pushed vertically downwards for clamping, preventing the magnetic pole from rotating relative to the main and auxiliary clamping devices 33.

[0105] The horizontal clamping mechanism 252 includes: a horizontal support 2522, a pusher motor, a pusher screw, and a pusher guide rail 2523.

[0106] Each transverse support 2522 is inserted into a side plate 243 at the lower beam. A pusher motor is installed within the transverse support 2522. A pusher screw is installed within the transverse support 2522 and connected to the pusher motor. The pusher screw extends laterally and is connected to the transverse pusher head 2521 via a screw drive. A pusher guide rail 2523 is installed on the transverse support 2522, parallel to the pusher screw. The transverse pusher head 2521 is installed on the pusher guide rail 2523 and is used for reciprocating movement along the pusher guide rail 2523.

[0107] A long, narrow through hole 2524 is provided at the transverse support 2522. The long, narrow through hole 2524 is arranged parallel to the push screw. The push screw is located below the long, narrow through hole 2524. A downwardly protruding limiting protrusion 25214 is provided at the bottom of the transverse push head 2521. The limiting protrusion 25214 is located in the long, narrow through hole 2524. The push screw passes through the limiting protrusion 25214 and is engaged with it through a helical transmission. The two transverse supports 2522 are arranged parallel to each other, with one transverse support 2522 located above the other transverse support 2522.

[0108] Considering the large size and weight of the magnetic poles of large generators, especially their large cross-sections, the sides of the magnetic poles are furthest from the axis of rotation when they first begin to rotate. During the rotation of the magnetic poles driven by the clamping device, the magnetic poles, due to their own inertia, generate a reverse resistance torque on the main and auxiliary clamping devices 33. Therefore, during repeated start-stop cycles of the magnetic poles, the clamping force at the side edges of the magnetic poles is prone to fail. To address this issue, the aforementioned transverse support 2522, push-top motor, push-top screw, and push-top guide rail 2523 work together to adjust the clamping force on both horizontal sides. After multiple start-stop cycles during the magnetic pole rotation process, the push-top motor can drive the push-top screw to rotate, causing the transverse push-top 2521 to move along the push-top guide rail 2523 and continuously push the sides of the magnetic poles, preventing gaps from forming between the transverse push-top 2521 and the magnetic poles. This effectively addresses the problem of loosening of the transverse push-top 2521 caused by the reverse resistance torque generated by the large magnetic poles on the main and auxiliary clamping devices 33.

[0109] Further, the lateral push top 2521 includes: a pad block 25211, a base plate 25212, and a side clamping plate 25213; the pad block 25211 is detachably mounted on the push guide rail 2523, and a limiting protrusion 25214 is mounted on the bottom surface of the pad block 25211; the base plate 25212 is detachably mounted on the pad block 25211, the base plate 25212 is a square plate and is horizontally mounted, and the top surface of the lower support plate 245 is flush with the top surface of the base plate 25212; the side clamping plate 25213 is vertically mounted in the center of the base plate 25212, the side clamping plate 25213 is mounted longitudinally, and the side clamping plate 25213 is connected to the base plate 25212.

[0110] Preferably, the two push-up motors can be two servo drive motors of the same model, and the two push-up screws of each horizontal clamping mechanism 252 are screws of the same model. Thus, when the two push-up motors are started, and the corresponding horizontal push-up 2521 is moved towards the center via the push-up screws, the two horizontal push-up 2521s move synchronously. Precise control of the rotation angle of the servo motors allows for accurate control of the synchronous approach distance of the two horizontal push-up 2521s towards the center, ensuring the accuracy of the real-time synchronous push-up of the magnetic poles by the two horizontal push-up 2521s towards the center. Therefore, even if the magnetic pole is not in the center of the lower support plate 245, the real-time synchronous and precise push-up characteristic of the horizontal push-up 2521s can be utilized to automatically return the deviated magnetic end to the central position, achieving automatic centering and positioning of the magnetic end. This achieves automatic centering of the magnetic pole ends, ensuring that the center of gravity of the magnetic pole does not shift during flipping. Automatic centering can be achieved for magnetic pole clamping up to 15 tons.

[0111] In addition, considering the unique characteristics of the bottom structure of the magnetic pole: downward protrusions are provided at the bottom of both ends of the magnetic pole. In order to effectively support the protrusions, side clamping plates 25213 are vertically installed in the center of the base plate 25212. The side clamping plates 25213 are arranged longitudinally, and the top surface of the lower support plate 245 is flush with the top surface of the base plate 25212. This allows the base plate 25212 and the lower support plate 245 to effectively support the protrusions simultaneously, and the side clamping plates 25213 can fully clamp the sides of the protrusions.

[0112] Furthermore, the worktable 4 has a cuboid structure, and multiple rollers 41 are provided on the top surface of the worktable 4. The multiple rollers 41 extend longitudinally and are used to rotate relative to the worktable 4.

[0113] Multiple rollers 41 can be used to facilitate the left and right movement of the magnetic poles on the worktable 4, making it easy to adjust the position of the magnetic poles on the worktable 4.

[0114] Vertical limit switches are provided at the upper and lower ends of the double column structure 264. The vertical limit switches are used to limit the vertical movement range of the main clamping base 21. Vertical limit switches are provided at the two ends of the longitudinal direction of the base 1. The vertical limit switches are used to limit the longitudinal movement range of the main moving base 2 and the auxiliary moving base 3.

[0115] Vertical limit switches are used to limit the longitudinal movement range of the main and auxiliary clamping bases 311, and longitudinal limit switches are used to limit the longitudinal movement range of the main and auxiliary moving bases 3, thereby effectively limiting the vertical and longitudinal movement range of the magnetic poles.

[0116] Both the lower support plate 245 and the fixing plate 2511 are made of nylon. Additionally, vertical nylon plates are detachably fixed to the inner sides of the two side clamping plates 25213. These nylon plates prevent damage to the workpiece during lifting and clamping.

[0117] See Figure 7 In addition, this embodiment also provides a method for using a beam positioner, wherein the positioner is the aforementioned magnetic pole welding positioner, and the method of use includes:

[0118] Make the main moving seat 2 and the auxiliary moving seat 3 move away from the worktable 4 along the longitudinal direction, so that the distance between the main moving seat 2 and the auxiliary moving seat 3 is greater than the length of the magnetic pole, so that the clamping height of the main clamping device 25 and the auxiliary clamping device 33 is consistent with the height of the worktable 4, and keep the main clamping device 25 and the auxiliary clamping device 33 in a fully open state.

[0119] The magnetic pole is hoisted onto the workbench 4 by a crane, so that the magnetic pole is suspended longitudinally in the center between the main moving seat 2 and the auxiliary moving seat 3. At this time, the magnetic pole is not in place, but is in a suspended state.

[0120] Lower the magnetic pole and simultaneously adjust the distance between the main moving seat 2 and the auxiliary moving seat 3 so that both ends of the magnetic pole fall into the main clamping device 25 and the auxiliary clamping device 33, which are kept in a fully open state. At this time, the magnetic pole is still in a suspended state.

[0121] The crane continues to lower the height of the magnetic pole, and the positions of the sides of the magnetic pole ends relative to the main clamping device 25 and the auxiliary clamping device 33 are adjusted in real time so that the two ends of the magnetic pole fall completely into the main clamping device 25 and the auxiliary clamping device 33.

[0122] Confirm that the bottom corners at both ends of the magnetic pole fall into the main clamping device 25 and the auxiliary clamping device 33, and place the magnetic pole on the worktable 4;

[0123] The main clamping device 25 and the auxiliary clamping device 33 clamp and fix the two ends of the magnetic pole along the longitudinal direction, and the main rotating seat 24 and the auxiliary rotating seat 32 are raised synchronously.

[0124] The rotational speed of the flip drive motor 23 is adjusted based on the height difference between the axis of the magnetic pole and the rotation axis center of the main and auxiliary rotating seats 32 during the rotation process.

[0125] By coordinating the crane and the positioner, and combining this method of use, the clamping and positioning of the beam magnetic poles is simplified, improving the clamping efficiency of the magnetic poles and ensuring the accuracy of the clamping and positioning of the magnetic poles.

[0126] In addition, the magnetic pole welding positioner in this embodiment enables continuous rotation of the magnetic poles from ±0 to 180°.

[0127] The magnetic pole welding positioner of this embodiment can perform flip welding on magnetic poles with a length of 1000-4000mm. The length of the first guide rail 11 in this embodiment can be 6000mm, with an effective stroke of 4500mm.

[0128] In addition, the workbench 4 in this embodiment is detachably mounted on the base 1. The workbench 4 can be of various specifications, such as 1000mm long × 300mm wide × 400mm high, or 2000mm long × 540mm wide × 400mm high, respectively adaptable to the horizontal placement of magnetic poles with lengths of 1000-2000mm and 2000-4000mm.

[0129] In this embodiment, through the cooperation of the main moving seat 2, auxiliary moving seat 3, main clamping base 21, tilting reducer 22, tilting drive motor 23, main rotating seat 24, main clamping device 25, auxiliary clamping base 311, auxiliary rotating seat 32, auxiliary clamping device 33, and worktable 4, the automatic clamping and fixing of the magnetic poles of the large generator, as well as automatic lifting and tilting, are achieved. This realizes the auxiliary tilting and positioning function for magnetic pole welding, replacing manual hoisting and tilting, improving safety, and saving labor intensity. The main and auxiliary moving seats 3 at both ends of the positioner can move longitudinally to adapt to magnetic poles of different lengths. In addition, through the main and auxiliary clamping bases 311, the positioner can move up and down along the vertical direction, that is, the Z-axis, which can cooperate with the subsequent welding robot and magnetic poles of different heights for welding operations. The main and auxiliary clamping devices 33 cooperate with the worktable 4 to realize automatic centering of magnetic poles weighing up to 15 tons, reducing labor intensity.

[0130] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A magnetic pole welding positioner for large generators, characterized in that, include: The system comprises a base, a main moving seat, a secondary moving seat, a main clamping base, a tilting reducer, a tilting drive motor, a main rotating seat, a main clamping device, a secondary clamping base, a secondary rotating seat, a secondary clamping device, and a worktable. The main moving seat, the worktable, and the secondary moving seat are sequentially arranged longitudinally on the base. The base is provided with a first guide rail and a rack, which are parallel to each other longitudinally. Both the main moving seat and the secondary moving seat are mounted on the first guide rail, which allows them to reciprocate longitudinally. A main drive motor and a secondary drive motor are respectively mounted on the main moving seat and the secondary moving seat, respectively. The main drive motor and the secondary drive motor are respectively connected to the rack via corresponding transmission gears. The main clamping base is located at the main moving seat, and the secondary clamping base is located at the secondary moving seat. The main clamping base is connected via... The main drive unit is connected to the main moving seat and is driven by the main lifting motor to move the main clamping base up and down relative to the main moving seat. The auxiliary clamping base is connected to the auxiliary moving seat via the auxiliary drive unit and is driven by the auxiliary lifting motor to move the auxiliary clamping base up and down relative to the auxiliary moving seat. The main rotating seat is rotatably connected to the main clamping base. The tilting drive motor is connected to the tilting reducer, and the tilting reducer is connected to the main rotating seat. The main clamping device is located at the main rotating seat, and the auxiliary rotating seat is rotatably connected to the auxiliary clamping base. The auxiliary clamping device is located at the auxiliary rotating seat. The main rotating seat and the auxiliary rotating seat are used to rotate around the longitudinal direction. The auxiliary clamping device is arranged opposite to the main clamping device. The auxiliary clamping device and the main clamping device are used to clamp and fix the two ends of the magnetic poles of the large generator. The main moving base includes a base and a double-column structure. The base is mounted on the first guide rail, and the main drive motor is mounted on the base. The double-column structure is fixed on the base. The main transmission includes a main worm gear reducer, a lead screw shaft, and a main moving nut. The main worm gear reducer is located at the top of the double-column structure and connected to the main drive motor. The lead screw shaft is vertically positioned between the two columns of the double-column structure, and its top end is connected to the main worm gear reducer. The main moving nut is sleeved on the lead screw shaft and connected to the main moving base. The worm gear inside the main worm gear reducer and the lead screw shaft are connected to the main moving base. The screw shaft is coaxially connected. A self-lubricating thrust bearing is installed at the worm wheel shaft inside the main worm gear reducer. A bearing seat is installed at the top of the double-column structure. A cylindrical roller bearing and a top thrust ball bearing are arranged sequentially from top to bottom inside the bearing seat. The cylindrical roller bearing and the top thrust ball bearing are sleeved on the top end of the screw shaft. The cylindrical roller bearing and the top thrust ball bearing are separated by a shoulder. The bottom end of the screw shaft is installed at the bottom of the double-column structure through a bushing. The bushing and the bottom end of the screw shaft are engaged by a bottom thrust ball bearing. The main moving seat and the auxiliary moving seat have the same structure. The main drive and the auxiliary drive have the same structure. The main clamping base is equipped with a nut fixing seat. The main moving nut has a stepped shaft structure, and its large end is secured below the nut fixing seat. The main clamping base is also equipped with an anti-rotation bracket, a fall arrestor, and a safety nut. The anti-rotation bracket is detachably connected to the bottom of the nut fixing seat by bolts. The main moving nut is positioned between the anti-rotation bracket and the nut fixing seat, and is detachably connected to the anti-rotation bracket. The fall arrestor is positioned on top of the nut fixing seat and includes a left arm and a right arm. The tops of the left and right arms protrude towards the center with a mating portion. The lead screw shaft is positioned between the left and right arms. The safety nut is fitted over the lead screw shaft and placed above the main moving nut, positioned between the left and right arms. The docking part is positioned above the safety nut; the main clamping base is a rectangular plate-shaped structure, and each column of the double column structure is provided with a second guide rail, which is arranged vertically. The wide side of the main clamping base is vertically arranged, and one side plate of the main clamping base cooperates with the two second guide rails. The nut fixing seat is located on one side plate of the main clamping base and is located near the wide side of one side of the main clamping base. The tilting reducer is located on one side plate of the main clamping base and is located near the wide side of the other side of the main clamping base. A transmission reducer is provided between the tilting drive motor and the tilting reducer. The transmission reducer is located on the wide side of the other side of the main clamping base. Both the tilting reducer and the transmission reducer are worm gear reducers. The main rotating seat is located on the other side plate of the main clamping base. A toothed rotary bearing is provided between the main rotating seat and the main clamping base. The main clamping base is connected to the inner ring of the toothed rotary bearing, and the main rotating seat is connected to the outer ring of the toothed rotary bearing. The output shaft of the tilting reducer is fixed with an output gear. The output gear meshes with the outer ring gear of the toothed rotary bearing through an intermediate gear. The rotational connection structure between the main rotating seat and the main clamping base is the same as the rotational connection structure between the auxiliary rotating seat and the auxiliary clamping base. The worktable has a cuboid structure, and multiple rollers are provided on the top surface of the worktable. The multiple rollers extend longitudinally and are used to rotate relative to the worktable. Vertical limit switches are provided at the upper and lower ends of the double column structure. The vertical limit switches are used to limit the vertical movement range of the main clamping base. Longitudinal limit switches are provided at the longitudinal ends of the base. The longitudinal limit switches are used to limit the longitudinal movement range of the main moving seat and the auxiliary moving seat.

2. The magnetic pole welding positioner according to claim 1, characterized in that, The main rotating seat includes an upright back plate and two side plates. The outer ring of the toothed rotary bearing is located on the back of the back plate. The two side plates are arranged parallel to each other in front of the back plate. The side plates are C-shaped. A horizontally arranged upper support plate is fixed to the top of the two side plates, and a horizontally arranged lower support plate is fixed to the bottom of the two side plates. The two side plates and the upper support plate form the upper beam of the main rotating seat. The two side plates and the lower support plate form the lower beam of the main rotating seat. The two side plates and the back plate form the vertical beam of the main rotating seat. The lower support plate is located on the top surface of the lower beam. Multiple vertical and horizontal ribs are provided on the lower beam. A plate, wherein multiple vertical stiffeners are arranged parallel to the back plate and connect two side uprights together, the multiple vertical stiffeners are arranged sequentially along the length direction of the lower beam, a horizontal stiffener is provided at the bottom surface of the lower beam and connects two side uprights together, the horizontal stiffener extends along the length direction of the lower beam, a diagonal stiffener is provided at the upper beam, the diagonal stiffener connects two side uprights together, the diagonal stiffener extends along the upper inclined edge of the side upright, the upper inclined edge of the side upright gradually approaches the upper support plate as it moves away from the back plate, and through holes are provided on the surface of the diagonal stiffener and the multiple vertical stiffeners.

3. The magnetic pole welding positioner according to claim 2, characterized in that, The main clamping device includes two horizontal clamping mechanisms and a vertical clamping mechanism. The vertical clamping mechanism is located on the upper beam, and its fixing plate is used to push the magnetic pole downward. The two horizontal clamping mechanisms are arranged opposite each other on the lower beam, and their lateral pushing heads are used to push and clamp the magnetic pole from the left and right sides. The main rotating seat and the auxiliary rotating seat have the same structure, and the main clamping device and the auxiliary clamping device have the same structure.

4. The magnetic pole welding positioner according to claim 3, characterized in that, The vertical clamping mechanism includes a hydraulic cylinder mechanism and a guide column. The hydraulic cylinder mechanism is fixed to the upper support plate. The piston rod of the hydraulic cylinder mechanism passes through the upper support plate from top to bottom and is connected to the fixed plate. The fixed plate is horizontally arranged, and the bottom profile of the cross-section of the fixed plate is an inverted V-shape. The cross-section of the fixed plate is perpendicular to the axis of the main rotating seat. The guide column stands vertically on the top surface of the fixed plate and is inserted into the upper support plate. The horizontal clamping mechanism includes a horizontal support, a pusher motor, a pusher screw, and a pusher guide rail. Each horizontal support is inserted into one of the side uprights at the lower beam. The pusher motor is located within the horizontal support. The pusher screw is located within the horizontal support and is connected to the pusher motor. The push screw extends laterally and is connected to the lateral push head via a helical drive. A push guide rail is mounted on the lateral support and is parallel to the push screw. The lateral push head is mounted on the push guide rail and is used for reciprocating along the push guide rail. An elongated through-hole is provided at the lateral support, parallel to the push screw. The push screw is positioned below the elongated through-hole. A downwardly protruding limiting protrusion is provided at the bottom end of the lateral push head, and the limiting protrusion is located within the elongated through-hole. The push screw passes through the limiting protrusion and engages with it via a helical drive. Two lateral supports are arranged parallel to each other, with one lateral support positioned above the other.

5. The magnetic pole welding positioner according to claim 4, characterized in that, The lateral pusher includes: a pad block, a base plate, and a side clamping plate; the pad block is detachably mounted on the pusher guide rail, and the limiting protrusion is located on the bottom surface of the pad block; the base plate is detachably mounted on the pad block, and the base plate is a square plate and is horizontally mounted; the top surface of the lower support plate is flush with the top surface of the base plate, and the side clamping plate is vertically mounted in the center of the base plate, the side clamping plate is arranged longitudinally, and the side clamping plate is connected to the base plate.

6. A method of using a positioner, characterized in that, The positioner is a magnetic pole welding positioner as described in any one of claims 1 to 5. The method of use includes: moving the main moving seat and the auxiliary moving seat longitudinally away from the worktable, such that the distance between the main moving seat and the auxiliary moving seat is greater than the length of the magnetic pole; ensuring that the clamping height of the main clamping device and the auxiliary clamping device is consistent with the height of the worktable; and keeping the main clamping device and the auxiliary clamping device fully open; hoisting the magnetic pole above the worktable using a crane, suspending the magnetic pole longitudinally at the center between the main moving seat and the auxiliary moving seat, at which point the magnetic pole is not lowered but remains suspended; lowering the magnetic pole and simultaneously adjusting the distance between the main moving seat and the auxiliary moving seat so that the two ends of the magnetic pole... The magnetic pole is lowered into the main clamping device and the auxiliary clamping device, which are kept fully open, while the magnetic pole remains suspended. The crane continues to lower the magnetic pole, adjusting the positions of the sides of both ends relative to the main clamping device and the auxiliary clamping device in real time, so that both ends of the magnetic pole are completely submerged in them. After confirming that the bottom corners of both ends of the magnetic pole are submerged in the main clamping device and the auxiliary clamping device, the magnetic pole is placed on the worktable. The main clamping device and the auxiliary clamping device clamp and fix the two ends of the magnetic pole longitudinally, and the main rotating seat and the auxiliary rotating seat are raised synchronously. The rotation speed of the flipping drive motor is adjusted according to the height difference between the magnetic pole's axis and the rotation axis centers of the main and auxiliary rotating seats during rotation.

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