A square stator lamination stacking device and stacking method

Abstract

This invention relates to the field of lamination stacking technology, and more particularly to a square stator lamination stacking device and method, comprising: a worktable and two stacking assemblies, each stacking assembly including a top-driving assembly and a guiding assembly. The top-driving assembly includes a mounting frame, a telescopic sleeve, and multiple telescopic push rods. The guiding assembly includes a slide block, two calibration plates, and a first driving member. The free end of the telescopic sleeve is provided with a push plate, which drives the push plate to embed into the stepped grooves of the two calibration plates to form a recess. The two telescopic push rods pass through the push plate and the stator laminations in sequence, and are positioned in the positioning grooves at both ends of the round steel. The two telescopic sleeves drive the two push plates to stack the two stator laminations onto the round steel from both ends, respectively, shortening the sliding distance on the round steel during lamination stacking. Furthermore, the arrangement of the guiding assembly, telescopic push rods, and telescopic sleeve effectively reduces the risk of insulation layer wear and avoids jamming.

Description

Technical Field

[0001] This invention relates to the field of lamination stacking technology, and more particularly to a square stator lamination stacking device and stacking method. Background Technology

[0002] An electric motor typically consists of a motor housing, a stator core, and a rotor core. The stator core is formed by stacking several stator laminations, and the rotor core is formed by stacking several rotor laminations. During motor operation, the main function of the stator is to generate a rotating magnetic field, and the rotor is cut by magnetic lines of force in the rotating magnetic field, thereby generating and outputting current.

[0003] In existing technology, when square stator laminations are stacked to form a stator core, multiple stator laminations are often positioned using four round steel bars placed at the four corners. The stacking method typically involves pressing the stator laminations into the round steel bars one by one from one end, thereby completing the stacking process on the round steel bars.

[0004] However, when stator laminations are stacked from one end, the sliding distance of the front half of the stator laminations on the round steel is generally longer. This long sliding distance causes the insulation layer at the four corner holes of the laminations to repeatedly contact and rub against the round steel, greatly increasing the risk of wear on the insulation layer. Furthermore, since only one end of the round steel forms a constraint, the laminations are prone to tilting due to gravity or positioning deviation during long-distance sliding, resulting in point contact rather than surface contact between the edge of the lamination hole and the round steel. This significantly increases the local pressure at the contact point, making the insulation layer more susceptible to scratches, and may even cause the laminations to jam. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a square stator lamination stacking device and stacking method, which effectively solves the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a square stator lamination stacking device, comprising: a worktable, and two stacking components symmetrically arranged on both sides of the stacking station on the worktable, each of the stacking components comprising:

[0007] The top drive assembly includes a mounting bracket disposed on the workbench, and a telescopic sleeve and a plurality of telescopic top rods mounted on the side wall of the mounting bracket facing the stacking station.

[0008] A guide assembly is slidably disposed between the stacking station and the top-mounted drive assembly along the stacking direction. It includes a slide, two calibration plates and a first drive member. The two calibration plates are respectively located on both sides of the stator lamination. The first drive member is mounted on the slide and is used to drive the two calibration plates to move closer or further apart from each other.

[0009] Among them, the two calibration plates are provided with stepped grooves on their opposite surfaces, and the free end of the telescopic sleeve is provided with a push plate. The telescopic sleeve drives the push plate to embed into the stepped groove to form a groove for placing stator laminations.

[0010] The two telescopic push rods located on the same axis pass through the push plate and the stator lamination in sequence, and are respectively pushed against the positioning grooves at both ends of the round steel. The two telescopic sleeves drive the two push plates to move closer to each other along the axial direction, so that the two stator laminations are stacked on the round steel from both ends.

[0011] Furthermore, a second driving member is provided on the side wall of the mounting bracket opposite to the telescopic sleeve;

[0012] The telescopic sleeve includes an outer sleeve fixed to the side wall of the mounting bracket and a piston assembly coaxially and slidably disposed inside the outer sleeve;

[0013] The driving end of the second driving member passes through the mounting bracket and is connected to the cylinder of the piston assembly. A support plate is provided at the piston rod end of the piston assembly, and the push plate is provided on the end face of the support plate facing the stator lamination.

[0014] Furthermore, the workbench is equipped with a lifting platform corresponding to the stacking station, and the lifting platform is used to carry the stacked stator laminations.

[0015] Furthermore, the workbench is equipped with a sliding assembly that supports and drives the mounting bracket to slide along the stacking direction, the sliding assembly comprising:

[0016] Two side baffles are arranged on both sides of the top drive assembly along the stacking direction;

[0017] Two protective plates are formed by bending and extending the mounting brackets on both sides of the two side baffles toward the stacking station.

[0018] A sliding member is located between the side baffle and the guard plate, and the sliding member causes the guard plate to slide on the baffle along the stacking direction.

[0019] Furthermore, a guide sleeve is provided at the end of the round steel bar;

[0020] The guide sleeve gradually converges inward toward the telescopic top rod, forming a variable diameter section;

[0021] The diameter of the large-diameter end of the variable-diameter section is equal to the diameter of the round steel, while the small-diameter end of the variable-diameter section is embedded in the tapered hole of the telescopic top rod drive end.

[0022] Furthermore, the calibration plate has a guide plate on the side facing the stacking station, and the distance between two guide plates in the same guide assembly is less than the distance between two calibration plates;

[0023] The two guide plates have openings on their opposite surfaces for the round steel bars to pass through.

[0024] The guide assembly further includes a third drive component for driving the slide to reciprocate along the stacking direction.

[0025] Furthermore, the push plate has multiple sets of positioning blocks on its side wall facing the stator lamination;

[0026] The multiple sets of positioning blocks are set at the positions of the heat dissipation holes of the stator laminations.

[0027] Furthermore, each of the two calibration plates is provided with a positioning sensor on the slide, and the positioning sensor is used to detect the movement distance of the two calibration plates when they move away from each other.

[0028] Furthermore, a through hole is provided on the push plate for the round steel to pass through, and a linear bearing is installed in the through hole. During the stacking process, the linear bearing is sleeved on the outside of the round steel and slides along the axial direction of the round steel.

[0029] The present invention also provides a method for stacking square stator laminations, using the square stator lamination stacking device described above, comprising the following steps:

[0030] Adjust the position of the stacking components on both sides of the workbench to ensure that the two stacking components are symmetrically distributed on both sides of the stacking station, providing a symmetrical reference for subsequent stacking operations;

[0031] The first drive unit of the guide assembly is activated, which drives the two calibration plates on the slide to move closer to each other until the distance between the opposite surfaces of the two calibration plates matches the side length of the square stator lamination. Then, the slide is controlled to drive the guide assembly to slide along the stacking direction to the initial position, so that the stepped groove of the calibration plate is aligned with the push plate of the telescopic sleeve, forming the placement reference of the stator lamination.

[0032] The stator laminations to be stacked are placed in the grooves formed by the two calibration plates and the push plate;

[0033] Start the telescopic top rod on the mounting bracket. The telescopic top rods at both ends extend synchronously, pass through the holes of the push plate and stator lamination in sequence, and finally align with the positioning grooves at both ends of the round steel to achieve positioning and clamping of the four round steels.

[0034] The telescopic sleeves on both sides synchronously drive the push plates to approach each other along the axial direction, pushing the stator laminations on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle.

[0035] Once the first set of stator laminations is stacked in place, the telescopic top rod and telescopic sleeve retract to their original positions, and the stacking process is repeated until the stacking height reaches the preset requirement. The stacked stator core is then removed, thus completing the entire stacking process.

[0036] The beneficial effects of this invention are as follows: By setting up two stacking devices, the stator laminations can be stacked from both ends of the round steel towards the middle. The maximum sliding distance of a single lamination is only 1 / 2 of the length of the round steel, which greatly shortens the sliding distance of the stacking process. During the stacking process, the stator laminations are precisely limited by the guide assembly. Combined with the telescopic top rod and telescopic sleeve, a stable axial thrust is formed on both sides of the round steel, ensuring that the laminations always maintain surface contact with the round steel when sliding. This eliminates the local high pressure caused by tilting, solves the problem of insulation layer scratches caused by point contact, effectively reduces the risk of insulation layer wear, and further avoids the occurrence of jamming. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the square stator lamination stacking device in an embodiment of the present invention;

[0039] Figure 2 This is a top view of the square stator lamination stacking device in an embodiment of the present invention;

[0040] Figure 3 for Figure 2 A magnified view of part A;

[0041] Figure 4 This is a first-view sectional view of the square stator lamination stacking device in an embodiment of the present invention;

[0042] Figure 5 for Figure 4 A magnified view of part B;

[0043] Figure 6 This is a second-angle cross-sectional view of the square stator lamination stacking device in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the stacking assembly in an embodiment of the present invention;

[0045] Figure 8 This is a left view of the stacking assembly in an embodiment of the present invention;

[0046] Figure 9 for Figure 7 A magnified view of part C;

[0047] Figure 10 This is a schematic diagram of the structure in which the telescopic top rod is in the top-down state with the round steel in an embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram of the structure of the top driving component in a stacked state in an embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of the structure of two calibration plates detaching from the stator laminations in an embodiment of the present invention.

[0050] Reference numerals: 1. Worktable; 11. Sliding assembly; 11a. Side baffle; 11b. Guard plate; 11c. Sliding component; 2. Stacking assembly; 21. Top drive assembly; 211. Mounting bracket; 212. Telescopic sleeve; 212a. Outer sleeve; 212b. Piston assembly; 212c. Support plate; 213. Telescopic top rod; 214. Push plate; 214a. Positioning block; 215. Second drive component; 22. Guide assembly; 22a. Step groove; 221. Slide; 222. Calibration plate; 223. First drive component; 224. Guide plate; 224a. Opening groove; 225. Third drive component; 226. Position sensor; 23. Lifting platform; 24. Guide sleeve. Detailed Implementation

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] like Figures 1 to 12 The square stator lamination stacking device shown includes a worktable 1 and two stacking assemblies 2 symmetrically arranged on both sides of the stacking station on the worktable 1. Each stacking assembly 2 includes:

[0054] The top drive assembly 21 includes a mounting bracket 211 disposed on the workbench 1, and a telescopic sleeve 212 and a plurality of telescopic top rods 213 mounted on the side wall of the mounting bracket 211 facing the stacking station.

[0055] The guide assembly 22 is slidably disposed between the stacking station and the top drive assembly 21 along the stacking direction. It includes a slide 221, two calibration plates 222 and a first drive member 223. The two calibration plates 222 are located on both sides of the stator lamination. The first drive member 223 is mounted on the slide 221 and is used to drive the two calibration plates 222 to move closer or further away from each other.

[0056] Among them, the two calibration plates 222 have stepped grooves 22a on their opposite surfaces, and the telescopic sleeve 212 has a push plate 214 at its free end. The telescopic sleeve 212 drives the push plate 214 to embed into the stepped grooves 22a, forming a groove for placing stator laminations.

[0057] Two telescopic push rods 213 located on the same axis pass through the push plate 214 and the stator lamination in sequence, and are respectively positioned in the positioning grooves at both ends of the round steel. Meanwhile, two telescopic sleeves 212 drive the two push plates 214 to approach each other along the axial direction, stacking the two stator laminations on the round steel from both ends.

[0058] During implementation, the positions of the two stacking components 2 are pre-adjusted to ensure symmetrical distribution on both sides of the stacking station; the first drive component 223 of the guide component 22 is activated, driving the two calibration plates 222 to approach each other until the distance between the opposite surfaces of the two calibration plates 222 matches the width of the square stator lamination. At this time, the slide block 221 drives the guide component 22 to slide along the stacking direction to the initial position, so that the stepped groove 22a of the calibration plate 222 is aligned with the push plate 214 of the telescopic sleeve 212. The stator lamination to be stacked is placed in the groove formed by the two calibration plates 222 and the push plate 214, ensuring that the holes at the four corners of the stator lamination are aligned with the axes of the four round steel bars respectively; the telescopic top rods 213 on the mounting bracket 211 are activated, and the telescopic top rods 213 on both sides extend synchronously, passing through the holes of the push plate 214 and the stator lamination in sequence. Finally, the four round steel bars are fixed in parallel within the positioning grooves at both ends of the round steel bars, completing the initial positioning of the round steel bars. Subsequently, the telescopic sleeves 212 on both sides synchronously drive the push plate 214 to move closer to each other along the axial direction, pushing the stator laminations on both sides toward the round steel bars and sliding along the round steel bars to achieve stacking from both ends to the middle. When the guide component 22 slides to a position close to the set stacking position, the first drive component 223 drives the calibration plate 222 to move away from each other, releasing the lateral constraint on the laminations. The push plate 214 continues to push the stator laminations until the set stacking position is reached. Then, the telescopic top rod 213 and the telescopic sleeve 212 retract and reset, repeating the stacking steps until the stacking height reaches the preset requirement. After stacking is completed, the telescopic top rod 213 is released from the top of the round steel bars, and the stacked stator core is removed, completing the entire stacking process.

[0059] This invention, through the arrangement of two stacking devices, enables stator laminations to be stacked from both ends of the round steel towards the middle. The maximum sliding distance of a single lamination is only 1 / 2 of the length of the round steel, greatly shortening the sliding distance for stacking. During the stacking process, the guide component 22 is used to precisely limit the stator laminations, and in combination with the telescopic top rod 213 and the telescopic sleeve 212, a stable axial thrust is formed on both sides of the round steel, ensuring that the laminations always maintain surface contact with the round steel during sliding. This eliminates local high pressure caused by tilting, solves the problem of insulation layer scratches caused by point contact, effectively reduces the risk of insulation layer wear, and further avoids jamming.

[0060] In this invention, after multiple telescopic top rods 213 are aligned with the round steel, the telescopic sleeve 212 stacks the stator laminations onto the round steel via the push plate 214 at the drive end. However, due to different stator specifications, the stacking height is different, and the required length of the round steel is also different. When facing round steel with a large span, in order to ensure that the stroke of the telescopic sleeve 212 can meet the stacking distance of the round steel, a second drive member 215 is provided on the side wall of the mounting frame 211 away from the telescopic sleeve 212. The telescopic sleeve 212 includes an outer sleeve 212a fixed on the side wall of the mounting frame 211 and a piston assembly 212b coaxially and slidably disposed inside the outer sleeve 212a.

[0061] The driving end of the second driving member 215 passes through the mounting bracket 211 and is connected to the cylinder of the piston assembly 212b. A support plate 212c is provided at the piston rod end of the piston assembly 212b, and a push plate 214 is provided on the end face of the support plate 212c facing the stator lamination.

[0062] In the initial stacking stage, the second drive unit 215 is not activated. The piston assembly 212b drives the support plate 212c, which in turn moves the push plate 214 synchronously, pushing the stator laminations to the end positions of the round steel. After the stator laminations have successfully entered the round steel, the second drive unit 215 activates. Through the coordinated operation of the second drive unit 215 and the telescopic sleeve 212, the push plate 214 is accelerated to move axially, causing the push plates 214 at both ends to synchronously push the two stator laminations towards the center until they reach the set position. The second drive unit 215 then pulls the piston assembly 212b in the opposite direction of the stacking direction, causing the piston of the piston assembly 212b to retract to its initial position. This process is repeated to complete the stacking of all stator laminations. After stacking, it is necessary to ensure that both ends of the round steel protrude beyond the end faces of the stator laminations. It should be noted that if the number of stator laminations is odd, the stator laminations must be stacked to the center position from one side before stacking begins simultaneously from both sides. The present invention utilizes the coordinated operation of the second driving member 215 and the telescopic sleeve 212 to improve the stacking speed, and utilizes the sum of the driving strokes of the telescopic sleeve 212 and the second driving member 215 to effectively ensure that the stacking distance meets the stator stacking height requirements.

[0063] In this invention, after a set of stator laminations is synchronously stacked, the telescopic top rod 213 needs to be briefly detached from the round steel so that the next set of stator laminations can smoothly enter between the two calibration plates 222. During the process of the telescopic top rod 213 detaching from the round steel, in order to ensure that the round steel always remains on the top axis, as a preferred solution, the workbench 1 is provided with a lifting platform 23 corresponding to the stacking position. The lifting platform 23 is used to carry the stacked stator laminations.

[0064] When the telescopic top rod 213 briefly detaches from the round steel, the lifting platform 23 provides stable support to the stacked stator laminations, and the stator laminations maintain a cooperative state with the round steel. Therefore, the stator laminations can constrain the round steel, preventing it from shifting due to the loss of the counterforce from the telescopic top rod 213, and keeping it always on the counter axis.

[0065] By setting up the lifting platform 23, the present invention supports the stacked stator laminations when the telescopic top rod 213 disengages from the round steel, which can indirectly constrain the round steel and prevent it from deviating from the top axis due to the loss of top force. This ensures that the telescopic top rod 213 can accurately align with the positioning groove at the end of the round steel when it is topped again, saving the time of adjusting the position of the round steel before each top repositioning of the telescopic top rod 213, shortening the cycle of a single stacking cycle, and thus improving the overall production efficiency.

[0066] The workbench 1 is equipped with a sliding assembly 11 that supports and drives the mounting frame 211 to slide along the stacking direction. The sliding assembly 11 includes two side baffles 11a, two guard plates 11b, and a slider 11c. The two side baffles 11a are arranged on both sides of the top drive assembly 21 along the stacking direction. The mounting frame 211 bends and extends towards the stacking station on both sides of the two side baffles 11a to form two guard plates 11b. The slider 11c is located between the side baffles 11a and the guard plates 11b, and the slider 11c causes the guard plates 11b to slide on the baffles along the stacking direction.

[0067] By setting the sliding component 11, the initial position and travel of the top drive component 21 can be flexibly adjusted according to the stacking height of the stator laminations, so that the equipment can adapt to the stacking requirements of square stator laminations of different specifications and enhance the versatility of the equipment. The sliding component 11 allows the mounting frame 211 to be stably mounted on the workbench 1, providing a stable sliding guide so that the mounting frame 211 will not shift or tilt during movement, thereby ensuring that the telescopic top rod 213 can always be accurately aligned with the positioning groove at the end of the round steel, ensuring alignment accuracy.

[0068] In this invention, the end of the round steel needs to frequently contact and disengage from the telescopic top rod 213. Long-term use can easily lead to wear or deformation of the end due to collisions and friction, which will affect the alignment accuracy. Preferably, a guide sleeve 24 is provided at the end of the round steel. The guide sleeve 24 is fixed at the end of the round steel and can directly bear the impact and friction of the telescopic top rod 213, avoiding damage to the round steel itself and saving maintenance costs.

[0069] When the telescopic push rod 213 is aligned with the positioning groove of the round steel, a sliding step surface will be formed at the end of the round steel. In order to avoid jamming caused by the stacking of the stator laminations on the sliding step surface, as a preferred solution, the guide sleeve 24 gradually converges inward toward the telescopic push rod 213 to form a variable diameter section. The diameter of the large diameter end of the variable diameter section is equal to the diameter of the round steel, while the small diameter end of the variable diameter section is embedded in the tapered hole of the drive end of the telescopic push rod 213.

[0070] The outer cylindrical surface of the guide sleeve 24 is set as a tapered structure. The variable diameter section gradually transitions from the large diameter end, which is the same as the diameter of the round steel, to the small diameter end, which is adapted to the telescopic push rod 213, forming a smooth transition tapered surface. This can guide the hole of the stator lamination to slide smoothly into the round steel along the inclined surface, avoiding the jamming phenomenon caused by the diameter difference between the telescopic push rod 213 and the round steel, and ensuring that the stator lamination stacking process is continuous and efficient.

[0071] As a preferred embodiment of the above scheme, the calibration plate 222 is provided with a guide plate 224 on the side facing the stacking station. The distance between the two guide plates 224 in the same guide assembly 22 is less than the distance between the two calibration plates 222. This forms a limit on the stator lamination, preventing the lamination from shifting position due to placement deviation or slight shaking when it is placed into the groove. This ensures that the four corner holes of the lamination are accurately aligned with the axis of the round steel and the guide sleeve 24, laying the foundation for the smooth entry of the round steel. More preferably, the two guide plates 224 are provided with an opening slot 224a on their opposite surfaces for the round steel to pass through. The guide assembly 22 also includes a third driving member 225 for driving the slide 221 to reciprocate along the stacking direction.

[0072] In this invention, during the initial alignment of the round steel bars, the opening slot 224a of the guide plate 224 directly supports the two ends of the four round steel bars on the alignment axis, and then alignment is performed by the telescopic top rod 213, shortening the alignment time. During stacking, the guide plate 224 first moves along the round steel bars, and the opening slot 224a of the guide plate 224 forms a pre-position for the round steel bars, ensuring that the axis of the round steel bars is highly consistent with the axis of the lamination hole, eliminating the initial alignment error between the lamination hole and the round steel bars. Subsequently, the stator lamination is smoothly inserted into the round steel bars along the sliding path of the guide plate 224. When the guide assembly 2 2. After moving to the set position, the first driving member 223 moves the two calibration plates 222 away from each other until the gap between the two guide plates 224 allows the stator laminations to pass through. The first driving member 223 stops moving, and the third driving member 225 moves the entire guide assembly 22 in the opposite direction along the stacking direction back to the initial position. Meanwhile, the telescopic sleeve 212 drives the push plate 214 to continue pushing the stator laminations until the stator laminations are in close contact with the stator laminations on the round steel. At this point, the telescopic sleeve 212 moves in the opposite direction along the stacking direction back to the initial position to perform the stacking operation of the next set of stator laminations. It should be noted that when the stator laminations are stacked with the stator laminations on the round steel, the distance between the outermost stator lamination on the round steel and the lamination to be stacked is sensed by the distance sensor set on the guide plate 224, and the driving distance of the push plate 214 is controlled to ensure that the two stator laminations are in close contact.

[0073] By setting the guide plate 224, pre-positioning is achieved, reducing edge friction or jamming caused by hole offset. This is especially suitable for scenarios where the insulation layer of the lamination is thin, reducing the risk of scratching the insulation layer. The opening slot 224a on the guide plate 224 allows the two guide plates 224 to be radially separated from the round steel under the action of the first drive member 223. Combined with the third drive assembly, continuous stacking of stator laminations can be achieved.

[0074] In this invention, the push plate 214 has multiple sets of positioning blocks 214a on the side wall facing the stator lamination; the multiple sets of positioning blocks 214a are set at the positions of the heat dissipation holes of the stator lamination.

[0075] When the pusher plate 214 pushes the stator laminations along the round steel, the cooperation between the positioning block 214a and the heat dissipation holes enables the laminations to form a rigid connection with the pusher plate 214, preventing relative sliding between them. This ensures that the pushing force of the pusher plate 214 is evenly transmitted to the laminations, preventing them from tilting due to uneven force, further reducing the risk of insulation wear, and ensuring that the laminations smoothly enter the round steel. In addition, the heat dissipation holes of the stator laminations are relatively fixed. After the positioning block 214a is embedded in the heat dissipation holes, it can restrict the rotation of the stator laminations circumferentially, preventing the laminations from shifting circumferentially during stacking due to the pushing force of the pusher plate 214 or the friction of the round steel. This ensures that the slots, holes, and other key structures of all laminations are completely aligned circumferentially, ensuring the continuity of the magnetic circuit of the stator core and reducing electromagnetic performance loss caused by circumferential misalignment.

[0076] In another preferred embodiment, position sensors 226 are provided on the slide 221 at positions corresponding to the two calibration plates 222. The position sensors 226 are used to detect the movement distance of the two calibration plates 222 when they move away from each other.

[0077] When the two calibration plates 222 move to the set position, the position sensor 226 sends a signal to the control system, which then controls the first drive component 223 to stop moving, so as to ensure that the two calibration plates 222 can accurately stop at the position that meets the operation requirements, ensuring that the stator laminations can pass smoothly or be accurately limited, and avoiding interference and other problems caused by excessive movement.

[0078] Since the push plate 214 needs to frequently move through the round steel to complete the stacking of stator laminations, in order to reduce the wear of the push plate 214 on the surface of the round steel, a through hole is provided on the push plate 214 for the round steel to pass through. A linear bearing is installed in the through hole. During the stacking process, the linear bearing is sleeved on the outside of the round steel and slides along the axial direction of the round steel.

[0079] Linear bearings can convert the sliding friction between the inner wall of the through hole and the round steel into rolling friction, significantly reducing frictional resistance and ensuring smooth movement of the push plate 214 during high-frequency stacking, reducing power loss caused by friction; at the same time, by reducing wear between the round steel and the through hole, additional frictional damage to the surface of the round steel caused by component deformation or jamming is indirectly avoided.

[0080] Furthermore, in a preferred embodiment of the present invention, the stator laminations are fed using a belt conveyor. When a set of belts is used, the belts are arranged along a path perpendicular to the stacking direction, with their conveying ends directly corresponding to the front or top of the stacking station. Specifically, the conveying direction of the belts forms a 90° angle with the stacking direction of the stator laminations. The stator laminations are neatly arranged on the belts, and the continuous operation of the belts conveys the laminations one by one to the feeding area of ​​the stacking station. At this time, a single belt can simultaneously feed two stacking assemblies 2. When two sets of belts are used, both sets of belts are arranged along a path parallel to the stacking direction and are independently set for two stacking assemblies 2. The conveying ends of each set of belts precisely connect to the feed inlet of the guide component 22 of its corresponding stacking assembly 2, and the conveying direction is consistent with the stacking direction of the stator laminations. The two sets of belts can operate independently, respectively responsible for conveying stator laminations to the left and right stacking assemblies 2, and the feeding speed is individually controlled by their respective drive motors and speed regulating mechanisms.

[0081] The present invention also provides a method for stacking square stator laminations, using a square stator lamination stacking device, comprising the following steps:

[0082] Adjust the positions of the stacking components 2 on both sides of the workbench 1 to ensure that the two stacking components 2 are symmetrically distributed on both sides of the stacking station, so as to provide a symmetrical reference for subsequent stacking operations;

[0083] The first drive member 223 of the guide assembly 22 is activated, which drives the two calibration plates 222 on the slide 221 to move closer to each other until the distance between the opposite surfaces of the two calibration plates 222 matches the side length of the square stator lamination. Then, the slide 221 is controlled to drive the guide assembly 22 to slide along the stacking direction to the initial position, so that the stepped groove 22a of the calibration plate 222 is aligned with the push plate 214 of the telescopic sleeve 212, forming a placement reference for the stator lamination.

[0084] The stator laminations to be stacked are placed in the grooves formed by the two calibration plates 222 and the push plate 214;

[0085] When the telescopic top rod 213 on the mounting bracket 211 is activated, the telescopic top rods 213 at both ends extend synchronously, pass through the holes of the push plate 214 and the stator lamination in sequence, and finally align with the positioning grooves at both ends of the round steel to achieve positioning and clamping of the four round steels.

[0086] The telescopic sleeves 212 on both sides synchronously drive the push plates 214 to approach each other along the axial direction, pushing the stator laminations on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle.

[0087] Once the first set of stator laminations is stacked in place, the telescopic top rod 213 and telescopic sleeve 212 retract and reset, repeating the stacking steps until the stacking height reaches the preset requirement. Then, the stacked stator core is removed, thus completing the entire stacking process.

[0088] This method employs a synchronous stacking approach at both ends, with stator laminations stacked from both ends of the round steel towards the middle. The sliding distance of a single lamination is only half that of traditional single-end stacking, significantly reducing stacking time. Simultaneously, the two side stacking components operate independently, providing continuous material supply, reducing waiting time, and significantly improving overall production efficiency. The entire stacking process is completed collaboratively by automated components, reducing manual adjustments and positioning, minimizing errors caused by human factors, reducing the labor intensity of operators, and improving production stability and consistency.

[0089] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A square stator lamination stacking device, characterized in that, include: A workbench, and two stacking assemblies symmetrically arranged on both sides of the stacking station on the workbench, each of the stacking assemblies comprising: The top drive assembly includes a mounting bracket disposed on the workbench, and a telescopic sleeve and a plurality of telescopic top rods mounted on the side wall of the mounting bracket facing the stacking station. A guide assembly is slidably disposed between the stacking station and the top-mounted drive assembly along the stacking direction. It includes a slide, two calibration plates and a first drive member. The two calibration plates are respectively located on both sides of the stator lamination. The first drive member is mounted on the slide and is used to drive the two calibration plates to move closer or further apart from each other. Among them, the two calibration plates are provided with stepped grooves on their opposite surfaces, and the free end of the telescopic sleeve is provided with a push plate. The telescopic sleeve drives the push plate to embed into the stepped groove to form a groove for placing stator laminations. The two telescopic push rods located on the same axis pass through the push plate and the stator lamination in sequence, and are respectively pushed against the positioning grooves at both ends of the round steel. The two telescopic sleeves drive the two push plates to move closer to each other along the axial direction, so that the two stator laminations are stacked on the round steel from both ends.

2. The square stator lamination stacking device according to claim 1, characterized in that, A second driving component is provided on the side wall of the mounting bracket opposite to the telescopic sleeve; The telescopic sleeve includes an outer sleeve fixed to the side wall of the mounting bracket and a piston assembly coaxially and slidably disposed inside the outer sleeve; The driving end of the second driving member passes through the mounting bracket and is connected to the cylinder of the piston assembly. A support plate is provided at the piston rod end of the piston assembly, and the push plate is provided on the end face of the support plate facing the stator lamination.

3. The square stator lamination stacking device according to claim 1, characterized in that, The workbench is equipped with a lifting platform corresponding to the stacking station, and the lifting platform is used to carry the stacked stator laminations.

4. The square stator lamination stacking device according to claim 1, characterized in that, The workbench is equipped with a sliding assembly that supports and drives the mounting bracket to slide along the stacking direction. The sliding assembly includes: Two side baffles are arranged on both sides of the top drive assembly along the stacking direction; Two guard plates are formed by bending and extending the mounting brackets on both sides of the two side baffles toward the stacking station. A sliding member is located between the side baffle and the guard plate, and the sliding member causes the guard plate to slide on the baffle along the stacking direction.

5. The square stator lamination stacking device according to claim 1, characterized in that, A guide sleeve is provided at the end of the round steel bar; The guide sleeve gradually converges inward toward the telescopic top rod, forming a variable diameter section; The diameter of the large-diameter end of the variable-diameter section is equal to the diameter of the round steel, while the small-diameter end of the variable-diameter section is embedded in the tapered hole of the telescopic top rod drive end.

6. The square stator lamination stacking device according to claim 1, characterized in that, The calibration plate has a guide plate on the side facing the stacking station, and the distance between two guide plates in the same guide assembly is less than the distance between two calibration plates; The two guide plates have openings on their opposite surfaces for the round steel bars to pass through. The guide assembly further includes a third drive member for driving the slide to reciprocate along the stacking direction.

7. The square stator lamination stacking device according to claim 1, characterized in that, The push plate has multiple sets of positioning blocks on its side wall facing the stator lamination; The multiple sets of positioning blocks are set at the positions of the heat dissipation holes of the stator laminations.

8. The square stator lamination stacking device according to claim 1, characterized in that, Each of the slide blocks is equipped with a positioning sensor corresponding to the position of the two calibration plates. The positioning sensor is used to detect the movement distance of the two calibration plates when they move away from each other.

9. The square stator lamination stacking device according to claim 1, characterized in that, The push plate has a through hole for the round steel to pass through, and a linear bearing is installed in the through hole. During the stacking process, the linear bearing is sleeved on the outside of the round steel and slides along the axial direction of the round steel.

10. A method for stacking square stator laminations, employing the square stator lamination stacking apparatus as described in any one of claims 1-9, characterized in that, Includes the following steps: Adjust the position of the stacking components on both sides of the workbench to ensure that the two stacking components are symmetrically distributed on both sides of the stacking station, providing a symmetrical reference for subsequent stacking operations; The first drive unit of the guide assembly is activated, which drives the two calibration plates on the slide to move closer to each other until the distance between the opposite surfaces of the two calibration plates matches the side length of the square stator lamination. Then, the slide is controlled to drive the guide assembly to slide along the stacking direction to the initial position, so that the stepped groove of the calibration plate is aligned with the push plate of the telescopic sleeve, forming the placement reference of the stator lamination. The stator laminations to be stacked are placed in the grooves formed by the two calibration plates and the push plate; Start the telescopic top rod on the mounting bracket. The telescopic top rods at both ends extend synchronously, pass through the holes of the push plate and stator lamination in sequence, and finally align with the positioning grooves at both ends of the round steel to achieve positioning and clamping of the four round steels. The telescopic sleeves on both sides synchronously drive the push plates to approach each other along the axial direction, pushing the stator laminations on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle. Once the first set of stator laminations is stacked in place, the telescopic top rod and telescopic sleeve retract to their original positions, and the stacking process is repeated until the stacking height reaches the preset requirement. The stacked stator core is then removed, thus completing the entire stacking process.

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