A kind of motor stator shell embedded wire repair tooling

Abstract

The application relates to a repairing tool for a motor stator band shell embedded wire, which comprises a base, multiple rollers, a roller frame and a locking mechanism. Multiple rollers are arranged on the upper surface of the base away from the ground, and one roller is arranged on each roller support. The roller frame comprises a first circular frame and a second circular frame, the first circular frame and the second circular frame are parallel and fixedly connected, the bottom of the first circular frame and the bottom of the second circular frame are respectively in contact with multiple rollers, and multiple rollers are used to drive the first circular frame and the second circular frame to synchronously rotate. The locking mechanism is arranged between the first circular frame and the second circular frame and is used for fixing the motor stator to be maintained. The application has the effects of reducing the labor intensity of repair personnel, improving the embedding wire working efficiency, improving the safety coefficient in the working process, reducing the possibility of injury accidents of personnel in the working process, and ensuring the repair quality.

Description

Technical Field

[0001] This application relates to the technical field of stator repair fixtures, and in particular to a repair fixture for a motor stator with a housing and embedded wires. Background Technology

[0002] During the maintenance of medium-sized motors ranging from 75kW to 132kW, the stator (along with the housing) must be rotated to a suitable angle before stator winding rewinding or coil insertion operations, so that the operator can insert the coils one by one into the slots. Currently, when adjusting the stator angle during the coil insertion process, the industry generally uses the following four methods to complete the stator angle adjustment: 1. A simple triangular bracket is used to suspend a hand chain hoist, and the stator is raised, lowered, and rotated manually by pulling the chain. However, this method has drawbacks such as requiring the chain to be pulled and loosened repeatedly for each rotation, resulting in low efficiency, and the risk of the chain swinging or slipping and crushing the operator's limbs, posing a significant safety hazard. 2. Two to three workers directly lift and tumble the stator casing. However, this method has drawbacks such as high labor intensity for workers, the heavy weight of the stator and casing, which can easily cause personnel crushing or falling accidents, and the tumbling angle control relies entirely on experience, requiring numerous adjustments.

[0003] 3. Use a workshop overhead crane hook or sling to lift the entire structure and then rotate it in the air. However, this requires a dedicated person to direct and operate the crane, involving multiple coordination steps; the overhead crane occupancy rate is high, and waiting time is long; the rotation process involves significant shaking and poor positioning accuracy, requiring manual repositioning.

[0004] 4. First, the stator core is pressed out of the housing as a whole, then the bare core is wired, and finally it is pressed back into the housing. However, the process is cumbersome and requires additional pressing equipment; the pressing / re-pressing process can easily damage the insulation of the core laminations and the housing stop, affecting the quality of the motor; the overall working time increases exponentially, and the efficiency is extremely low.

[0005] In summary, existing technologies all suffer from the common drawbacks of "low efficiency, high labor intensity, high safety risks, and numerous quality hazards," and there is an urgent need for a specialized tooling equipment that can be operated by a single person and accurately positioned at any angle of 360°. Summary of the Invention

[0006] In order to reduce the labor intensity of repair personnel, improve the efficiency of winding work, increase the safety factor in the work process, reduce the possibility of personnel injury accidents during the work process, and ensure the repair quality, this application provides a repair tooling for winding motor stator housing.

[0007] This application provides a repair fixture for a motor stator with a housing and winding, which adopts the following technical solution: A repair fixture for a motor stator with a housing and embedded wires includes a base, multiple rollers, a roller frame, and a locking mechanism. Multiple rollers are mounted on the upper surface of the base away from the ground, with one roller mounted on each roller bracket. The roller frame includes a first circular frame and a second circular frame, which are parallel and fixedly connected. The bottom of the first circular frame and the bottom of the second circular frame respectively contact the multiple rollers, and the multiple rollers drive the first circular frame and the second circular frame to rotate synchronously. The locking mechanism is disposed between the first circular frame and the second circular frame and is used to fix the motor stator to be repaired.

[0008] By adopting the above technical solution, the use of roller support and roller frame rotation can replace the need for multiple people to lift and carry the motor, reducing the labor intensity of maintenance workers. The rolling pair between the rollers and the roller frame can achieve stepless rotation, and the winding angle is precisely adjustable, enabling arbitrary positioning of the motor stator with its housing during maintenance. When working with the stator and housing, there is no need to press out the iron core, reducing the possibility of secondary damage to the iron core and housing, and ensuring repair quality. After the motor stator is locked, it can become an integral part with the roller frame, reducing the possibility of falling or being crushed during rotation and improving safety.

[0009] Optionally, the plurality of rollers includes two driving rollers and two driven rollers. The two driving rollers are coaxially arranged and a drive shaft is connected between them. The two driven rollers are coaxially arranged. A first drive assembly is also installed on the roller bracket corresponding to the two driving rollers. The first drive assembly includes a first drive motor, and the output end of the first drive motor is fixedly connected to the drive shaft.

[0010] By adopting the above technical solution, the first drive motor allows a single person to control the forward and reverse rotation of the roller frame via a button, shortening the rotation time and improving work efficiency. The roller frame is supported by four rollers, and the coaxial design of the rollers ensures even load distribution, reducing the possibility of uneven load on a single roller and improving roller life.

[0011] Optionally, an angle closed-loop sensor is installed at the end of the drive shaft away from the first drive motor, and the housing of the angle closed-loop sensor is fixed on the corresponding roller bracket.

[0012] By adopting the above technical solution, no manual secondary correction is required after the roller frame is flipped, thus improving the winding efficiency. The angle closed-loop sensor can be linked with the electromagnetic brake, stopping immediately upon power failure while maintaining the angle, reducing the possibility of positioning errors caused by the rebound of traditional mechanical brakes.

[0013] Optionally, a plurality of connecting rods are fixedly connected between the first circular frame and the second circular frame, and the locking mechanism includes locking rods installed on the plurality of connecting rods; for each locking rod, the locking rod includes a positioning sleeve, a straight threaded screw, an adjusting tube, a reverse threaded screw, and a stator locking sleeve. The positioning sleeve is fixedly connected to the corresponding connecting rod, the straight threaded screw is fixedly connected to the positioning sleeve, and a straight threaded nut and a reverse threaded nut are fixedly connected to both ends of the adjusting tube in the length direction, respectively. The end of the straight threaded screw away from the positioning sleeve is threadedly connected to the straight threaded nut, the reverse threaded screw is threadedly connected to the reverse threaded nut, and the end of the reverse threaded screw away from the reverse threaded nut is fixedly connected to the stator locking sleeve. The stator locking sleeve corresponds to the end cover screw hole of the motor stator to be repaired.

[0014] By adopting the above technical solution, the overall length of the locking rod can be adjusted by rotating the adjusting tube, thereby realizing the extension and retraction of the radial length of the locking rod, which can adapt to different stator outer diameters.

[0015] Optionally, for each of the positioning sleeves, the positioning sleeve is respectively fitted onto the outside of the corresponding connecting rod, and the positioning sleeve is threadedly connected to a fixing screw, which passes through the side wall of the positioning sleeve and abuts against the connecting rod.

[0016] By adopting the above technical solution, the positioning sleeve can be locked at any position along the entire length of the connecting rod, making it easy to adapt to motor stators of different lengths without changing tooling. It has a compact structure, uses point contact locking with set screws, occupies little space, and does not interfere with the rotation of the roller frame.

[0017] Optionally, the base is a rectangular frame, and reinforcing plates are fixedly connected to the four corners of the base.

[0018] By adopting the above technical solution and setting up reinforcing plates, the stress at the four corner nodes of the rectangular frame is reduced, thereby improving the overall torsional stiffness. The reinforcing plates can also serve as guide blocks for the fork arms, preventing the fork arms from impacting the welds and extending the life of the base.

[0019] Optionally, the lower part of the four corners of the base is provided with support legs, and each of the four support legs is equipped with a lockable caster wheel away from the bottom of the base.

[0020] By adopting the above technical solution, the tooling machine can be manually rotated 360°, and short-distance relocation within the workshop can be completed without the need for a forklift. Once the brakes on the lockable casters are engaged, the tooling machine will no longer slide, and its stability during wire embedding is equivalent to that of fixed outriggers.

[0021] Optionally, a mounting plate is provided below the base, and a scissor-type lifting mechanism is connected between the mounting plate and the base. The lower part of the mounting plate is provided with support legs, and lockable casters are respectively installed on the bottom of the four support legs away from the mounting plate.

[0022] By adopting the above technical solution, it is possible to adapt to different forklift or AGV forklift heights, and the clamping of the motor stator is more labor-saving.

[0023] Optionally, each of the connecting rods has a length scale on its outer side wall.

[0024] By adopting the above technical solution, when manually adjusting the locking rod distance, the adjustment distance of multiple locking rods can be confirmed visually, eliminating the need for measuring tape. The scales of multiple connecting rods are clear at a glance, facilitating the synchronization of errors and ensuring the accuracy of locking rod distance adjustment.

[0025] Optionally, the positioning sleeve is a positioning clamp, which is sleeved on the outside of the corresponding connecting rod. The positioning clamp includes a clamp bolt, and the positioning clamp is fixed to the required position of the corresponding connecting rod by rotating the clamp bolt.

[0026] By adopting the above technical solutions, the disassembly and installation of the positioning clamps are more efficient and more user-friendly for on-site maintenance when the locking rod needs to be frequently changed or overhauled. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the repair tooling according to one embodiment of this application.

[0028] Figure 2 This is one embodiment of the present application. Figure 1 Enlarged diagram of point A in the middle.

[0029] Figure 3 This is a schematic diagram illustrating the driven wheel structure of one embodiment of this application.

[0030] Figure 4 This is a structural schematic diagram illustrating another embodiment of the repair tooling of this application.

[0031] Figure 5 This is one embodiment of the present application. Figure 4 Enlarged diagram of point B in the middle.

[0032] Figure 6 This is a schematic diagram illustrating the structure of a scissor lift mechanism according to one embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Base; 11. Reinforcing plate; 12. Support leg; 13. Lockable caster wheel; 14. Mounting plate; 15. Scissor lift mechanism; 2. Roller; 21. Drive wheel; 22. Driven wheel; 23. First drive motor; 24. Angle closed-loop sensor; 3. Roller frame; 31. First circular frame; 32. Second circular frame; 4. Connecting rod; 5. Locking rod; 51. Positioning sleeve; 52. Straight threaded screw; 53. Adjusting tube; 54. Reverse threaded screw; 55. Stator locking sleeve; 56. Fixing screw; 6. Positioning clamp; 7. Length scale. Detailed Implementation

[0034] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 As shown in the figure, this application embodiment provides a repair fixture for a motor stator with a housing and embedded wire, including a base 1, multiple rollers 2, a roller frame 3, and a locking mechanism; multiple rollers 2 are installed on the upper surface of the base 1 away from the ground, and each roller 2 bracket is respectively installed with one roller 2; the roller frame 3 includes a first circular frame 31 and a second circular frame 32, the first circular frame 31 and the second circular frame 32 are parallel and fixedly connected, the bottom of the first circular frame 31 and the bottom of the second circular frame 32 respectively contact the multiple rollers 2, and the multiple rollers 2 are used to drive the first circular frame 31 and the second circular frame 32 to rotate synchronously; the locking mechanism is disposed between the first circular frame 31 and the second circular frame 32 for fixing the motor stator to be repaired.

[0037] The base 1 is placed horizontally on the ground, with the side away from the ground being the upper surface, forming the load-bearing foundation of the entire fixture. The roller 2 brackets are fixed to the upper surface of the base 1, arranged in two rows (or four corners); each roller 2 bracket is equipped with one roller 2, and a certain gap is left between the highest point of the outer circle of the roller 2 and the upper surface of the base 1 to ensure that the roller frame 3 can roll freely on it.

[0038] In this embodiment, the roller 2 bracket can be fixed to the base 1 by welding or bolting. The roller 2 can be installed to the roller 2 bracket via a bearing seat and axle pin, enabling low-friction rotation.

[0039] like Figure 1As shown, the roller frame 3 consists of two parallel circular rings, a first circular ring 31 and a second circular ring 32. The first circular ring 31 and the second circular ring 32 are coaxial and have the same radius. The bottom of the first circular ring 31 can be tangent to the outer circle of the front roller, and the bottom of the second circular ring 32 can be tangent to the outer circle of the rear roller, ensuring that the two circular rings rotate synchronously. In this embodiment, the first circular ring 31 and the second circular ring 32 can be respectively made by rolling outwards from a No. 6 C-shaped steel channel. The roller frame 3 can rotate 360 ​​degrees to meet any angle requirement.

[0040] The locking mechanism is installed between the first round frame 31 and the second round frame 32 (i.e., the internal space of the roller frame 3). The front end of the locking rod 5 is in direct contact with the stator housing, which can achieve concentric fixation of the stator and the roller frame 3.

[0041] When repairing a motor stator, a manual or motorized forklift can be used. The forklift arm is inserted into the stator, and the stator is then raised to a position approximately concentric with roller 3. The stator is moved into roller 3, and the locking mechanism is adjusted to connect with it. After the stator is secured, the forklift is withdrawn, and the wiring process can begin. If the angle of the stator needs adjustment during wiring, roller 2 can be used to rotate roller 3 to achieve the desired angle. After wiring, the forklift is inserted into the repaired stator, and the forklift arm rises, disengaging the locking mechanism from the stator housing and pulling the stator out of roller 3. This completes the wiring process for the motor stator with its housing.

[0042] In this embodiment, the rollers 2 provide support and the roller frame 3 rotates, replacing the need for multiple people to lift and carry the motor, thus reducing the labor intensity of maintenance workers. The rolling pair between rollers 2 and roller frame 3 allows for stepless rotation, and the winding angle is precisely adjustable, enabling positioning of the motor stator with its housing at any angle during maintenance. When working with the stator and housing, there is no need to press out the iron core, reducing the possibility of secondary damage to the iron core and housing, and ensuring repair quality. After the motor stator is locked, it can become an integral part of the roller frame 3, reducing the possibility of falling or being crushed during rotation and improving safety.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, in an optional implementation of this embodiment, the plurality of rollers 2 include two driving rollers 21 and two driven rollers 22. The two driving rollers 21 are coaxially arranged and a drive shaft is connected between the two driving rollers 21. The two driven rollers 22 are coaxially arranged. A first drive assembly is also installed on the roller 2 bracket corresponding to the two driving rollers 21. The first drive assembly includes a first drive motor 23, and the output end of the first drive motor 23 is fixedly connected to the drive shaft.

[0044] The two driving wheels 21 are coaxially arranged and share a single drive shaft. The bearing seats at both ends of the drive shaft are fixed within the corresponding roller brackets 2. The two driven wheels 22 are coaxially arranged and fixed within two other roller brackets 2. The highest points of the outer circumferences of the driving wheels 21 and driven wheels 22 are located on the same horizontal plane, ensuring that the roller frame 3 is supported at four points and rotates synchronously.

[0045] The first drive assembly may also include a speed reducer and a brake. The first drive motor 23 can be rigidly connected to either end of the drive shaft via a flange or coupling. The housing of the first drive motor 23 can be bolted to the outside of the corresponding roller 2 bracket. The output shaft is coaxial with the drive shaft to achieve torque transmission.

[0046] The drive shaft and drive wheel 21 can be press-fitted via keyways or expansion sleeves, reducing the possibility of slippage. The first drive motor 23 and drive shaft can be connected via a perforated coupling or a flexible pin coupling to absorb impact. The first drive motor 23 can be fixed using an L-shaped mounting plate 14 and 4×M12 bolts, allowing for fine-tuning of the belt / chain tension. The first drive motor 23 has a built-in electromagnetic brake that stops immediately upon power failure and maintains the desired angle.

[0047] With the first drive motor 23, a single person can control the forward and reverse rotation of the roller frame 3 via a button, shortening the rotation time and improving work efficiency. The roller frame 3 is supported by four rollers 2, and the coaxial design of the rollers 2 ensures even load distribution, reducing the possibility of uneven load on a single roller and extending the life of the rollers 2. The two driven rollers 22 do not require power and can be replaced by adding a second motor to drive the two driven rollers 22, achieving dual drive of the first drive motor 23 and the second drive motor to meet the maintenance needs of larger tonnage motor stators.

[0048] As an optional implementation in this embodiment, among the four rollers 2, two rollers 2 on the same side and coaxial can be selected to share a hand crank shaft, while the other two rollers 2 are free rollers 2. The two ends of the hand crank shaft are fixed in the bracket of the corresponding roller 2 by bearing seats.

[0049] A drum or disc mechanical brake with a handle is installed on the outer side of the hub of each roller 2 corresponding to the hand crank shaft; the brake shoes (or brake pads) are in contact with the outer circle of roller 2, the brake is released when the handle is pulled up, and locked when pressed down. The brake handle can be linked by a linkage or wire rope to realize the simultaneous operation of the two rollers 2 with one hand to ensure that there is no backslip after the roller frame 3 stops rotating.

[0050] like Figure 1As shown, in this embodiment, the end of the drive shaft that extends 30-50mm beyond the roller 2 bracket from the first drive motor 23 can serve as the mounting section for the angle closed-loop sensor 24 (absolute encoder). The housing of the angle closed-loop sensor 24 can be rigidly secured to the outside of the corresponding roller 2 bracket using two M6 bolts via an L-shaped bracket, ensuring coaxiality with the drive shaft.

[0051] The rotor of the angle closed-loop sensor 24 can be connected to the drive shaft end using a perforated coupling or a flexible expansion sleeve to eliminate slight eccentricity. The signal line of the angle closed-loop sensor 24 can pass through the reserved hole in the roller 2 bracket into the internal wire groove of the base 1 and connect to the driver of the first drive motor 23 or the PLC to achieve closed-loop feedback.

[0052] By incorporating an angle closed-loop sensor 24, manual secondary calibration is unnecessary after the roller frame 3 flips, improving winding efficiency. The angle closed-loop sensor 24 can be linked with the electromagnetic brake, stopping immediately upon power failure while maintaining the angle, reducing the possibility of positioning errors caused by the rebound of traditional mechanical brakes. The angle closed-loop sensor 24 is positioned at the same end as the drive shaft, reducing long-shaft torsional errors; during maintenance, the entire machine can be replaced simply by loosening the coupling.

[0053] like Figure 1 and Figure 2 As shown, in this embodiment, a plurality of connecting rods 4 are fixedly connected between the first circular frame 31 and the second circular frame 32. The locking mechanism includes locking rods 5 installed on the plurality of connecting rods 4. For each locking rod 5, the locking rod 5 includes a positioning sleeve 51, a straight threaded screw 52, ​​an adjusting tube 53, a reverse threaded screw 54, and a stator locking sleeve 55. The positioning sleeve 51 is fixedly connected to the corresponding connecting rod 4. The straight threaded screw 52 is fixedly connected to the positioning sleeve 51. The two ends of the adjusting tube 53 in the length direction are respectively fixedly connected to a straight threaded nut and a reverse threaded nut. The end of the straight threaded screw 52 away from the positioning sleeve 51 is threadedly connected to the straight threaded nut. The reverse threaded screw 54 is threadedly connected to the reverse threaded nut. The end of the reverse threaded screw 54 away from the reverse threaded nut is fixedly connected to the stator locking sleeve 55. The stator locking sleeve 55 corresponds to the end cover screw hole of the motor stator to be repaired.

[0054] In this embodiment, four connecting rods 4 can be fixedly connected between the first circular frame 31 and the second circular frame 32. The four connecting rods 4 are welded to the first circular frame 31 and the second circular frame 32 in a “four equal parts” along the circumference of the circular frame to form a rigid spatial frame. Each connecting rod 4 can be a DN32 thick-walled steel pipe. Two locking rods 5 can be arranged on each connecting rod 4, for a total of eight rods, which are radially spaced towards the center of the roller frame 3.

[0055] The positioning sleeve 51 is fixed onto the connecting rod 4. The straight threaded screw 52, ​​made of M20 straight threaded screw, is welded to the positioning sleeve 51 at a 90° angle to form a radial extension arm. The adjusting tube 53 can be a DN32 steel pipe, with an M20 straight threaded nut and an M20 reverse threaded nut welded to both ends to form a two-way screw mechanism. The reverse threaded screw 54, made of M20 screw, is threadedly engaged with the reverse threaded nut of the adjusting tube 53. Rotating the adjusting tube 53 allows for synchronous extension and retraction. The stator locking sleeve 55, made of DN20 short steel pipe, is welded to the end of the reverse threaded screw 54, with its inner hole aligned with the bolt hole of the motor end cover for point-to-point locking.

[0056] The overall length of the locking rod 5 can be adjusted by rotating the adjusting tube 53, allowing for radial extension and retraction of the locking rod 5. This radial extension and retraction accommodates different stator outer diameters. All eight locking rods 5 are locked synchronously, and rotating the adjusting tube 53 quickly achieves concentric positioning of the motor stator and roller frame 3, which is more efficient than traditional bolt clamps. The stator locking sleeve 55 directly grips the end cover bolt holes, without pressing on the iron core or touching the coils, reducing the possibility of motor stator deformation or insulation damage.

[0057] like Figure 1 and Figure 2 As shown, as an optional implementation in this embodiment, for each of the positioning sleeves 51, the positioning sleeve 51 is respectively sleeved on the outside of the corresponding connecting rod 4, and the positioning sleeve 51 is threadedly connected to a fixing screw 56. The fixing screw 56 passes through the side wall of the positioning sleeve 51 and abuts against the connecting rod 4.

[0058] The positioning sleeve 51 can be a short sleeve made of thick-walled steel pipe, with an inner diameter slightly larger than the outer diameter of the connecting rod 4, and slides directly onto the outer wall of the connecting rod 4. An M6 or M8 threaded through hole can be drilled in the side wall of the positioning sleeve 51. After the fixing screw 56 (set screw) is screwed into this hole, its end face radially penetrates the wall and presses against the surface of the connecting rod 4, achieving point contact locking. A knurled knob or an internal hex head can be added to the outer end of the fixing screw 56 for easy hand tightening.

[0059] In this optional embodiment, the positioning sleeve 51 can be locked at any position along the entire length of the connecting rod 4, making it easy to adapt to motor stators of different lengths without changing tooling. It has a compact structure, uses point contact locking with set screws, occupies little space, and does not interfere with the rotation of the roller frame 3.

[0060] like Figure 4 and Figure 5 As shown, as another optional implementation in this embodiment, the positioning sleeve 51 can be a positioning clamp 6. The positioning clamp 6 is sleeved on the outside of the corresponding connecting rod 4. The positioning clamp 6 includes a clamp bolt. By rotating the clamp bolt, the positioning clamp 6 can be fixed to the required position of the corresponding connecting rod 4.

[0061] The positioning clamp 6 can be an open-type metal clamp (such as stainless steel or carbon steel), with an inner diameter slightly larger than the outer diameter of the connecting rod 4. The positioning clamp 6 is directly slidably fitted onto the outer wall of the connecting rod 4 and can move axially to any position. Coaxial threaded holes are provided at both ends of the opening of the positioning clamp 6; after the clamp bolt passes through the two holes and is tightened, the bolt end face presses against the outer wall of the connecting rod 4, achieving radial locking of the positioning clamp 6. When the locking rod 5 requires frequent replacement or major overhaul, the positioning clamp 6 offers higher disassembly and installation efficiency and is more user-friendly for on-site maintenance.

[0062] As an optional implementation in this embodiment, each of the connecting rods 4 has a length scale 7 on its outer side wall.

[0063] Length markings 7 can be laser-etched or screen-printed on the outer surface of the connecting rod 4, with an accuracy of 1 mm and a range of 0–200 mm (corresponding to the required travel distance). The length markings 7 are continuously arranged along the axial direction of the connecting rod 4, parallel to its centerline, allowing for easy reading by the operator from the side. The length markings 7 are directly formed on the metal surface of the rod, requiring no additional parts. If rust prevention is required, a transparent epoxy coating can be added to the marking area to prevent oil stains and wear.

[0064] When manually adjusting the distance of the locking rod 5, the adjustment distance of multiple locking rods 5 can be confirmed by visual inspection, eliminating the need for measuring with a tape measure. The scales of multiple connecting rods 4 are clearly visible, facilitating the synchronization of errors and ensuring the accuracy of the adjustment of the locking rod 5.

[0065] like Figure 1 and Figure 3 As shown, the base 1 is a rectangular frame, and reinforcing plates 11 are fixedly connected to its four corners. A triangular reinforcing plate 11 (thickness 6-8mm) can be welded to the inner side of each of the four corners of the rectangular frame. The upper edge of the reinforcing plate 11 is flush with the upper surface of the rectangular frame, forming a three-dimensional triangular rigid node. The reinforcing plate 11 and the base 1 can be joined by a continuous fillet weld, with a weld leg height ≥5mm. An M10 bolt pair is added between the reinforcing plate 11 and the rectangular frame for easy disassembly or secondary reinforcement.

[0066] By setting the reinforcing plate 11, the stress at the four corner nodes of the rectangular frame is reduced, and the overall torsional stiffness is improved. The reinforcing plate 11 can also serve as a guide block for the fork arm, preventing the fork arm from impacting the weld and extending the service life of the base 1.

[0067] like Figure 1 and Figure 4 As shown, as an optional implementation in this embodiment, the lower part of the four corners of the base 1 is provided with support legs 12, and the four support legs 12 are respectively equipped with lockable casters 13 away from the bottom of the base 1.

[0068] The base 1 has four legs 12 welded to its lower corners (which can be No. 8 C-shaped steel or square tubing). Each leg 12 has a lockable caster wheel 13 installed at its bottom. The center line of the lockable caster wheel 13 coincides with the center line of the corresponding leg 12 to ensure vertical force application. The four lockable caster wheels 13 are coplanar to ensure the overall machine is level.

[0069] The tooling can be manually rotated 360°, and short-distance relocation within the workshop can be completed without the need for a forklift. After the brake of the lockable caster 13 is applied, the tooling will no longer slide, and its stability during wire embedding is the same as that of the fixed support leg 12.

[0070] like Figure 4 and Figure 6 As shown, as another optional implementation in this embodiment, a mounting plate 14 is provided below the base 1, and a scissor-type lifting mechanism 15 is connected between the mounting plate 14 and the base 1. The lower part of the mounting plate 14 is provided with support legs 12, and lockable casters 13 are respectively installed on the bottom of the four support legs 12 away from the mounting plate 14.

[0071] A rectangular mounting plate 14 (which can be the same size as the base 1) is added below the base 1. A scissor lift mechanism 15 is installed between the mounting plate 14 and the base 1. The scissor lift mechanism 15 includes two sets of X-shaped scissor arms and a drive element. The two sets of X-shaped scissor arms are hinged to a central pin. The drive element can be a 24V electric push rod with a stroke of 0–400mm. Support legs 12 are welded to the four corners of the mounting plate 14. Lockable casters 13 are installed on the base plate of the support legs 12. The lockable casters 13 are always on the ground during lifting. The overall height is adjustable to adapt to different forklift or AGV forklift heights, and the clamping of the motor stator is easier.

[0072] As an optional implementation in this embodiment, two infrared through-beam sensors for detecting whether the stator of the motor to be repaired is deviated are installed on the side wall of the roller frame 3.

[0073] Two infrared through-beam sensors are installed on the side wall of the roller frame 3 to detect in real time whether the stator of the motor under maintenance has deviated radially.

[0074] Two infrared through-beam sensors can be fixed to the inner circular sidewalls of the first circular frame 31 and the second circular frame 32, respectively. The emitting and receiving ends of the infrared through-beam sensors are radially opposite each other, and the beam coincides with the radius of the roller frame 3, forming a detection line that passes through the outer circle of the stator.

[0075] The bodies of the two infrared through-beam sensors can be locked to the pre-reserved threaded holes on the side wall by L-shaped aluminum alloy brackets and M6 bolts. The cables can be routed along the inner side of the connecting rod 4 of the roller frame 3 and led to the control box of the base 1 via slip rings or drag chains to avoid tangling during rotation.

[0076] When the motor stator experiences radial misalignment during rotation, the beam is blocked. The repair tool can immediately trigger an audible and visual alarm and automatically brake, reducing the possibility of winding errors or safety accidents. No repeated manual measurements are required; LED indicators clearly show whether the motor stator is centered, shortening changeover time. The infrared through-beam sensor is a non-contact infrared detection method, which does not affect the stator's paint or insulation layer, resulting in low maintenance costs.

[0077] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A repair tool for a stator banding of an electric machine, characterized in that, The device includes a base (1), multiple rollers (2), a roller frame (3), and a locking mechanism. Multiple rollers (2) are mounted on the upper surface of the base (1) away from the ground, with one roller (2) mounted on each roller (2) support. The roller frame (3) includes a first circular frame (31) and a second circular frame (32), which are parallel and fixedly connected. The bottom of the first circular frame (31) and the bottom of the second circular frame (32) respectively contact the multiple rollers (2), and the multiple rollers (2) drive the first circular frame (31) and the second circular frame (32) to rotate synchronously. The locking mechanism is located between the first circular frame (31) and the second circular frame (32) and is used to fix the motor stator to be repaired.

2. The repair fixture according to claim 1, characterized in that, The plurality of rollers (2) include two driving rollers (21) and two driven rollers (22). The two driving rollers (21) are coaxially arranged and a drive shaft is connected between the two driving rollers (21). The two driven rollers (22) are coaxially arranged. A first drive assembly is also installed on the roller (2) bracket corresponding to the two driving rollers (21). The first drive assembly includes a first drive motor (23). The output end of the first drive motor (23) is fixedly connected to the drive shaft.

3. The repair fixture according to claim 2, characterized in that, An angle closed-loop sensor (24) is installed at the end of the drive shaft away from the first drive motor (23), and the housing of the angle closed-loop sensor (24) is fixed on the corresponding roller (2) bracket.

4. The repair fixture according to claim 1, characterized in that, A plurality of connecting rods (4) are fixedly connected between the first circular frame (31) and the second circular frame (32). The locking mechanism includes locking rods (5) installed on the plurality of connecting rods (4). For each locking rod (5), the locking rod (5) includes a positioning sleeve (51), a straight threaded screw (52), an adjusting tube (53), a reverse threaded screw (54), and a stator locking sleeve (55). The positioning sleeve (51) is fixedly connected to the corresponding connecting rod (4), and the straight threaded screw (52) is fixedly connected to the corresponding connecting rod (4). The positioning sleeve (51) is fixedly connected, and the two ends of the adjusting tube (53) along the length direction are respectively fixedly connected with a straight thread nut and a reverse thread nut. The end of the straight thread screw (52) away from the positioning sleeve (51) is threadedly connected to the straight thread nut, and the reverse thread screw (54) is threadedly connected to the reverse thread nut. The end of the reverse thread screw (54) away from the reverse thread nut is fixedly connected to the stator locking sleeve (55). The stator locking sleeve (55) corresponds to the end cover screw hole of the motor stator to be repaired.

5. The repair fixture according to claim 4, characterized in that, For each of the positioning sleeves (51), the positioning sleeve (51) is respectively sleeved on the outside of the corresponding connecting rod (4). The positioning sleeve (51) is threadedly connected to a fixing screw (56). The fixing screw (56) passes through the side wall of the positioning sleeve (51) and abuts against the connecting rod (4).

6. The repair fixture according to claim 5, characterized in that, The base (1) is a rectangular frame, and reinforcing plates (11) are fixedly connected to the four corners of the base (1).

7. The repair fixture according to claim 6, characterized in that, The base (1) has four legs (12) at its lower corners, and each of the four legs (12) has a lockable caster wheel (13) installed at its bottom away from the base (1).

8. The repair fixture according to claim 6, characterized in that, A mounting plate (14) is provided below the base (1). A scissor lift mechanism (15) is connected between the mounting plate (14) and the base (1). The lower part of the mounting plate (14) is provided with support legs (12). Lockable casters (13) are installed on the bottom of the four support legs (12) away from the mounting plate (14).

9. The repair fixture according to claim 5, characterized in that, Each of the connecting rods (4) has a length scale (7) on its outer side wall.

10. The repair fixture according to claim 4, characterized in that, The positioning sleeve (51) is a positioning clamp (6), which is sleeved on the outside of the corresponding connecting rod (4). The positioning clamp (6) includes a clamp bolt. By rotating the clamp bolt, the positioning clamp (6) is fixed to the required position of the corresponding connecting rod (4).

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