Square stator punching sheet stacking device and stacking method

Abstract

The invention relates to the technical field of punching sheet stacking, in particular to a square stator punching sheet stacking device and method.The square stator punching sheet stacking device comprises a workbench and two stacking assemblies, each stacking assembly comprises an opposite-vertex driving assembly and a guiding assembly, and each opposite-vertex driving assembly comprises a mounting frame, a telescopic sleeve and a plurality of telescopic ejector rods; the guide assembly comprises a sliding seat, two calibration plates and a first driving part, a pushing plate is arranged at the free end of the telescopic sleeve, and the telescopic sleeve drives the pushing plate to be embedded into step grooves of the two calibration plates to form a groove; the two telescopic ejector rods sequentially penetrate through the pushing plates and the stator punching sheets and abut against the interiors of the positioning grooves in the two ends of the round steel, the two telescopic sleeves drive the two pushing plates, the two stator punching sheets are stacked on the round steel from the two ends of the round steel, and the sliding distance of the punching sheets on the round steel during stacking is shortened; the risk of abrasion of the insulating layer is effectively reduced, and the clamping stagnation phenomenon is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of punching sheet stacking, and in particular to a square stator punching sheet stacking device and a stacking method. Background Art

[0002] A motor typically consists of a motor housing, a stator core, and a rotor core. The stator core is formed by stacking several stator laminations, while the rotor core is formed by stacking several rotor laminations. During motor operation, the stator's primary function is to generate a rotating magnetic field, while the rotor is cut by the magnetic lines of force in this rotating field, generating and outputting current.

[0003] In the prior art, when square stator punchings are stacked to form a stator core, they are often positioned using four round steel bars at the four corners. The stacking method is usually to press the stator punchings into place from one end of the round steel bar, and then stack them on the round steel bar.

[0004] However, since the sliding distance of the front half of the stator punchings on the round steel is generally longer when the stator punchings are stacked from one end, the long-distance sliding will cause the insulation layer of the four corner holes of the punchings to repeatedly contact and rub against the round steel, greatly increasing the risk of wear of the insulation layer; and since only one end of the round steel forms a constraint, the punchings are prone to tilt due to gravity or positioning deviation during long-distance sliding, resulting in point contact rather than surface contact between the edge of the punching hole and the round steel, which will significantly increase the local pressure at the contact point, making the insulation layer more susceptible to scratches and even causing the punchings to become stuck. Summary of the Invention

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

[0006] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a square stator punching stacking device, comprising: a workbench, and two stacking assemblies symmetrically arranged on both sides of the stacking station of the workbench, each of the stacking assemblies comprising: A top driving assembly includes a mounting frame provided on the workbench, and a telescopic sleeve and a plurality of telescopic ejector rods installed on a side wall of the mounting frame facing the stacking station; A guide assembly is slidably disposed between the stacking station and the top-to-top drive assembly along the stacking direction, comprising a slide, two calibration plates, and a first drive member, wherein the two calibration plates are respectively located on both sides of the stator punching sheet, and the first drive member is mounted on the slide and is used to drive the two calibration plates toward or away from each other; Wherein, step grooves are provided on the opposite surfaces of the two calibration plates, and a push plate is provided at the free end of the telescopic sleeve, and the telescopic sleeve drives the push plate to be embedded in the step groove to form a groove for placing the stator punching sheet; The two telescopic push rods located on the same axis pass through the push plate and the stator punching in sequence, and respectively press against the positioning grooves at both ends of the round steel, and the two telescopic sleeves respectively drive the two push plates to approach each other along the axial direction, and stack the two stator punchings on the round steel from both ends.

[0007] Furthermore, a second driving member is provided on a side wall of the mounting frame facing away from the telescopic sleeve; The telescopic sleeve includes an outer sleeve fixed to the side wall of the mounting frame, and a piston assembly coaxially slidably arranged inside the outer sleeve; The driving end of the second driving member passes through the mounting bracket and is connected to the cylinder body of the piston assembly. A support plate is provided at the end of the piston rod of the piston assembly. The push plate is provided on the end surface of the support plate facing the stator punching sheet.

[0008] Furthermore, the workbench is provided with a lifting platform corresponding to the stacking station, and the lifting platform is used to carry the stacked stator punching sheets.

[0009] Furthermore, the workbench is equipped with a sliding assembly that supports and drives the mounting frame to slide along the stacking direction, and the sliding assembly includes: Two side baffles are arranged on both sides of the top driving assembly along the stacking direction; Two guard plates, the mounting frame is formed by bending and extending the two side edges 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 enables the guard plate to slide along the stacking direction and be arranged on the baffle.

[0010] Furthermore, a guide sleeve is provided at the end of the round steel; The guide sleeve gradually converges inwards toward the telescopic push rod to form a diameter-reducing section; The diameter of the large diameter end of the reducing section is equal to the diameter of the round steel, and the small diameter end of the reducing section is embedded in the tapered hole of the driving end of the telescopic push rod.

[0011] Furthermore, a guide plate is provided on a side of the calibration plate facing the stacking station, and a distance between two guide plates in the same guide assembly is smaller than a distance between two calibration plates; Open slots for round steel to pass through are provided on the opposite surfaces of the two guide plates; Wherein, the guide assembly further includes a third driving member for driving the slide to move back and forth along the stacking direction.

[0012] Furthermore, a plurality of positioning blocks are provided on the side wall of the push plate facing the stator punching sheet; The plurality of groups of positioning blocks are arranged corresponding to the heat dissipation hole positions of the stator punching sheets.

[0013] Furthermore, positions on the slide corresponding to the two calibration plates are each provided with an in-place sensor, and the in-place sensor is used to detect a moving distance when the two calibration plates move away from each other.

[0014] Furthermore, a through hole for the round steel to pass through is opened on the pushing plate, and a linear bearing is installed in the through hole. During the stacking process, the linear bearing is sleeved outside the round steel and slides along the axial direction of the round steel.

[0015] The present invention also provides a method for stacking square stator sheets, which uses the square stator sheet stacking device described above and includes the following steps: Adjust the positions 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; Start the first driving member of the guide assembly to drive the two calibration plates on the slide toward each other until the distance between the opposing surfaces of the two calibration plates matches the side length of the square stator punching. Then control the slide to drive the guide assembly to slide along the stacking direction to the initial position, so that the step groove of the calibration plate is aligned with the push plate of the telescopic sleeve, forming a placement reference for the stator punching. Place the stator punching sheets to be laminated in the groove formed by the two calibration plates and the push plate; Start the telescopic push rod on the mounting frame, and the telescopic push rods at both ends extend synchronously, pass through the holes of the push plate and the stator punching in turn, and finally hit 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 move closer to each other along the axial direction, pushing the stator punching sheets on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle; When the first set of stator punching sheets are stacked in place, the telescopic push rod and telescopic sleeve retract and reset, and the stacking steps are repeated until the stacking height reaches the preset requirement. The stacked stator core is removed, and the entire stacking process is finally completed.

[0016] The beneficial effects of the present invention are as follows: the present invention enables the stator punching sheets to be overlapped from both ends of the round steel to the middle through the arrangement of two stacking devices, and the maximum sliding distance of a single punching sheet is only 1 / 2 of the length of the round steel, which greatly shortens the sliding distance of the stacking advancement; and during the stacking process, the stator punching sheets are precisely limited by the guide assembly, and combined with the telescopic push rod and the telescopic sleeve, a bilateral axial stable thrust is formed on the round steel, ensuring that the punching sheets always maintain surface contact with the round steel when sliding, eliminating the local high pressure caused by tilting, solving the problem of scratches on the insulation layer caused by point contact, effectively reducing the risk of wear of the insulation layer, and further avoiding the occurrence of jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of a square stator punching stacking device in an embodiment of the present invention; Figure 2 A top view of a square stator punching stacking device according to an embodiment of the present invention; Figure 3 for Figure 2 A local enlarged view of point A; Figure 4 A cross-sectional view from a first perspective of a square stator punching stacking device according to an embodiment of the present invention; Figure 5 for Figure 4 A local enlarged view of point B; Figure 6 A cross-sectional view from a second perspective of the square stator punching stacking device according to an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the stacking assembly in an embodiment of the present invention; Figure 8 It is a left side view of the stacking assembly according to an embodiment of the present invention; Figure 9 for Figure 7 A partial enlarged view of point C; Figure 10 This is a structural diagram of the telescopic push rod in the state of butting against the round steel in an embodiment of the present invention; Figure 11 This is a structural schematic diagram of the top drive assembly in a stacked state according to an embodiment of the present invention; Figure 12 This is a schematic structural diagram of two calibration plates separated from stator punchings in an embodiment of the present invention.

[0019] Figure markings: 1. workbench; 11. sliding assembly; 11a. side baffle; 11b. guard plate; 11c. sliding member; 2. stacking assembly; 21. top drive assembly; 211. mounting frame; 212. telescopic sleeve; 212a. outer sleeve; 212b. piston assembly; 212c. support plate; 213. telescopic push rod; 214. push plate; 214a. positioning block; 215. second drive member; 22. guide assembly; 22a. step groove; 221. slide; 222. calibration plate; 223. first drive member; 224. guide plate; 224a. opening groove; 225. third drive member; 226. in-position sensor; 23. lifting platform; 24. guide sleeve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 12 The square stator sheet stacking device shown includes a workbench 1 and two stacking assemblies 2 symmetrically arranged on both sides of the stacking station on the workbench 1. Each stacking assembly 2 includes: The top driving assembly 21 includes a mounting frame 211 provided on the workbench 1, and a telescopic sleeve 212 and a plurality of telescopic ejector rods 213 installed on the side wall of the mounting frame 211 facing the stacking station; The guide assembly 22 is slidably disposed between the stacking station and the top driving assembly 21 along the stacking direction, and includes a slide 221, two calibration plates 222, and a first driving member 223. The two calibration plates 222 are respectively located on both sides of the stator punching. The first driving member 223 is mounted on the slide 221 and is used to drive the two calibration plates 222 to move closer to or away from each other. The two calibration plates 222 have step grooves 22a on their opposite surfaces, and a push plate 214 is provided at the free end of the telescopic sleeve 212. The telescopic sleeve 212 drives the push plate 214 to fit into the step groove 22a, forming a groove for placing the stator punching sheet. The two telescopic push rods 213 located on the same axis pass through the push plate 214 and the stator punching in turn, and respectively press against the positioning grooves at both ends of the round steel, and the two telescopic sleeves 212 respectively drive the two push plates 214 to approach each other along the axial direction, stacking the two stator punchings on the round steel from both ends.

[0023] During the implementation process, the positions of the two stacking components 2 are pre-adjusted to ensure that they are symmetrically distributed on both sides of the stacking station; the first driving member 223 of the guide component 22 is started to drive the two calibration plates 222 closer to each other until the spacing between the opposite surfaces of the two calibration plates 222 matches the width of the square stator punching. At this time, the slide 221 drives the guide component 22 to slide to the initial position along the stacking direction, so that the step groove 22a of the calibration plate 222 is aligned with the push plate 214 of the telescopic sleeve 212, and the stator punching 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 punching are respectively aligned with the axes of the four round steels; the telescopic push rod 213 on the mounting frame 211 is started, and the telescopic push rods 213 on both sides are extended synchronously, passing through the push plate 214 and the holes of the stator punching in turn. , and finally they are aligned in the positioning grooves at both ends of the round steel, achieving parallel fixation of the four round steels and completing the preliminary positioning of the round steels; then, the telescopic sleeves 212 on both sides synchronously drive the pushing plates 214 to approach each other axially, pushing the stator punchings on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle. When the guide assembly 22 slides to a position close to the set stacking position, the first driving member 223 drives the calibration plates 222 away from each other, releasing the lateral constraints on the punchings, and the pushing plates 214 continue to push the stator punchings until they reach the set stacking position, the telescopic push rod 213 and the telescopic sleeve 212 retract and reset, and the stacking steps are repeated until the stacking height reaches the preset requirement; after the stacking is completed, the telescopic push rod 213 is released from the round steel, the stacked stator core is removed, and the entire stacking process is completed.

[0024] The present invention enables the stator punching sheets to be overlapped from both ends of the round steel to the middle by setting up two stacking devices. The maximum sliding distance of a single punching sheet is only 1 / 2 of the length of the round steel, which greatly shortens the sliding distance of the stacking advancement. During the stacking process, the guide assembly 22 is used to accurately limit the stator punching sheets. Combined with the telescopic top rod 213 and the telescopic sleeve 212, a bilateral axial stable thrust is formed on the round steel, ensuring that the punching sheets always maintain surface contact with the round steel when sliding, eliminating the local high pressure caused by tilting, solving the problem of scratching the insulation layer caused by point contact, effectively reducing the risk of insulation layer wear, and further avoiding the occurrence of jamming.

[0025] In the present invention, after the multiple telescopic push rods 213 are aligned with the round steel, the telescopic sleeve 212 stacks the stator punchings on the round steel through the push plate 214 at the driving end. However, due to different specifications of stators, the stacking heights are different, and the required round steel lengths are 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 driving 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 to the side wall of the mounting frame 211, and a piston assembly 212b coaxially slidably disposed inside the outer sleeve 212a; The driving end of the second driving member 215 passes through the mounting frame 211 and is connected to the cylinder body of the piston assembly 212b. A support plate 212c is provided at the end of the piston rod of the piston assembly 212b, and the push plate 214 is provided on the end surface of the support plate 212c facing the stator punching sheet.

[0026] In the initial stage of stacking, the second driving member 215 does not work, and the piston assembly 212b is used to drive the support plate 212c to synchronously drive the push plate 214 to move and push the stator punching to the end position of the round steel. After the stator punching successfully enters the round steel, the second driving member 215 starts to move, and the second driving member 215 and the telescopic sleeve 212 work together to accelerate the axial movement of the push plate 214, so that the push plates 214 at both ends synchronously push the two stator punchings toward the middle until they move to the set position. The second driving member 215 pulls the piston assembly 212b in the opposite direction of the stacking direction and retracts the piston stem of the piston assembly 212b to the initial position. Repeat the above steps to complete the stacking of all stator punchings. After the stacking is completed, it is necessary to ensure that both ends of the round steel protrude from the end face of the stator punching. It should be noted that if the number of stator punchings is odd, the stator punchings need to be stacked to the middle position from one side, and then the two sides start stacking synchronously. The present invention utilizes the coordinated operation of the second driving member 215 and the telescopic sleeve 212 to increase 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 requirement.

[0027] In the present invention, after a group of stator punching sheets completes synchronous stacking, the telescopic push rod 213 needs to temporarily detach from the round steel so that the next group of stator punching sheets can smoothly enter between the two calibration plates 222. In the process of the telescopic push rod 213 detaching from the round steel, in order to ensure that the round steel always remains on the axis of the top, as a preferred solution, the workbench 1 is provided with a lifting platform 23 corresponding to the stacking station, and the lifting platform 23 is used to carry the stacked stator punching sheets.

[0028] When the telescopic push rod 213 is temporarily separated from the round steel, the lifting platform 23 forms a stable support for the stacked stator punchings, and the stator punchings and the round steel remain in a matched state. Therefore, the stator punchings can be used to constrain the round steel, so that the round steel will not deviate due to the loss of the counter-pressing force of the telescopic push rod 213, and will always remain on the counter-pressing axis.

[0029] The present invention provides a lifting platform 23, which supports the stacked stator punching sheets when the telescopic push rod 213 is separated from the round steel, thereby indirectly restraining the round steel, preventing the round steel from deviating from the top axis due to loss of the top force, and ensuring that the telescopic push rod 213 can accurately dock with the positioning groove at the end of the round steel when it is top-jointed next time, saving the time of adjusting the position of the round steel before the telescopic push rod 213 is re-topped each time, shortening the period of a single stacking cycle, and thus improving the overall production efficiency.

[0030] 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 sliding member 11c. The two side baffles 11a are arranged on both sides of the top driving assembly 21 along the stacking direction; the two side edges of the mounting frame 211 corresponding to the two side baffles 11a are bent and extended toward the stacking station to form two guard plates 11b; the sliding member 11c is located between the side baffles 11a and the guard plates 11b, and the sliding member 11c enables the guard plates 11b to slide along the stacking direction and be set on the baffle.

[0031] By setting the sliding assembly 11, the initial position and moving stroke of the top driving assembly 21 can be flexibly adjusted according to the stacking height of the stator punching sheets, so that the equipment can adapt to the stacking requirements of square stator punching sheets of different specifications, thereby enhancing the versatility of the equipment; and the sliding assembly 11 enables the mounting frame 211 to be stably erected on the table surface of the workbench 1, providing a stable sliding guide, so that the mounting frame 211 will not be laterally offset or skewed during the 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, thereby ensuring the top accuracy.

[0032] In the present invention, the end of the round steel needs to frequently abut and disengage with the telescopic push rod 213. Long-term use may easily cause the end to wear or deform due to collision and friction, thereby affecting the top accuracy. Preferably, a guide sleeve 24 is provided at the end of the round steel; the guide sleeve 24 is fixed to the end of the round steel and can directly withstand the impact force and friction of the telescopic push rod 213, thereby avoiding damage to the round steel itself and saving maintenance costs.

[0033] When the telescopic push rod 213 is pressed against 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 the sliding step from getting stuck against the stack of stator punching sheets, as a preferred solution, the guide sleeve 24 gradually gathers inward toward the telescopic push rod 213 to form a reducing section; the diameter of the large diameter end of the reducing section is equal to the diameter of the round steel, and the small diameter end of the reducing section is embedded in the tapered hole at the driving end of the telescopic push rod 213.

[0034] The outer cylindrical surface of the guide sleeve 24 is set to a tapered structure, and the diameter-reducing section gradually transitions from the large-diameter end with the same diameter as the round steel to the small-diameter end adapted to the telescopic push rod 213, forming a smoothly transitioned conical surface, which can guide the holes of the stator punching sheets 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 the continuous and efficient stacking process of the stator punching sheets.

[0035] As a preferred embodiment of the above scheme, a guide plate 224 is provided on the side of the calibration plate 222 facing the stacking station, and the distance between the two guide plates 224 in the same guide assembly 22 is smaller than the distance between the two calibration plates 222; forming a limit for the stator punching sheet, avoiding position deviation of the punching sheet due to placement deviation or slight shaking when the punching sheet is placed in the groove, ensuring that the four corner holes of the punching sheet are accurately aligned with the axis of the round steel and the guide sleeve 24, laying the foundation for the subsequent smooth entry into the round steel; and further preferably, an open groove 224a for the round steel to pass through is provided on the opposite surfaces of the two guide plates 224; the guide assembly 22 also includes a third driving member 225 for driving the slide 221 to move back and forth along the stacking direction.

[0036] In the present invention, when the round steel is initially aligned, the open groove 224a of the guide plate 224 directly sets the two ends of the four round steels on the axis of the alignment, and then the alignment is performed through the telescopic push rod 213, which shortens the alignment time; and when stacking, the guide plate 224 first moves along the round steel, and the open groove 224a of the guide plate 224 forms a pre-position for the round steel, so that the axis of the round steel and the axis of the punching hole are highly consistent, eliminating the initial alignment error between the punching hole and the round steel; then the stator punch is smoothly inserted into the round steel along the sliding path of the guide plate 224, and when the guide assembly 2 After moving to the set position, the first driving member 223 moves the two calibration plates 222 away from each other until the distance between the two guide plates 224 allows the stator punching to pass through. The first driving member 223 stops, and the third driving member 225 causes the entire guide assembly 22 to move in the opposite direction of the stacking direction to the initial position. The telescopic sleeve 212 drives the push plate 214 to continue pushing the stator punching until the stator punching is in close contact with the stator punching on the round steel. At this time, the telescopic sleeve 212 moves in the opposite direction of the stacking direction to the initial position and the stacking operation of the next group of stator punchings is carried out. It should be noted that when the stator punching is stacked with the stator punching on the round steel, the distance between the outermost stator punching on the round steel and the positioning punching 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 close contact between the two stator punchings.

[0037] By setting the guide plate 224, pre-positioning is performed to reduce edge friction or jamming caused by hole offset, which is particularly suitable for scenarios where the insulation layer of the punching sheet is thinner, reducing the risk of scratching the insulation layer. The setting of the open groove 224a on the guide plate 224 enables the two guide plates 224 to radially separate from the round steel under the action of the first drive member 223, and combined with the third drive component, realize the continuous stacking operation of the stator punching sheet.

[0038] In the present invention, a plurality of positioning blocks 214 a are provided on the side wall of the push plate 214 facing the stator punching sheet; the plurality of positioning blocks 214 a are provided corresponding to the positions of the heat dissipation holes of the stator punching sheet.

[0039] When the push plate 214 pushes the stator punching sheet to move along the round steel, the cooperation between the positioning block 214a and the heat dissipation hole can form a rigid connection between the punching sheet and the push plate 214, preventing relative sliding between the two, ensuring that the thrust of the push plate 214 can be evenly transmitted to the punching sheet, preventing the punching sheet from tilting due to uneven force, further reducing the risk of wear of the insulation layer, and ensuring that the punching sheet smoothly enters the round steel. In addition, the heat dissipation hole position of the stator punching sheet is relatively fixed. After the positioning block 214a is embedded in the heat dissipation hole, it can circumferentially limit the rotation of the stator punching sheet, preventing the punching sheet from circumferentially offsetting due to the thrust of the push plate 214 or the friction of the round steel during the stacking process, ensuring that the key structures such as the slot type and hole position of all punching sheets are completely aligned in the circumferential direction, ensuring the magnetic circuit continuity of the stator core, and reducing the electromagnetic performance loss caused by circumferential misalignment.

[0040] In another preferred embodiment, in-position sensors 226 are provided at positions on the slide 221 corresponding to the two calibration plates 222 , and the in-position sensors 226 are used to detect the moving distance when the two calibration plates 222 move away from each other.

[0041] When the two calibration plates 222 move to the set position, the in-position sensor 226 will send a signal to the control system, and the control system will then control the first drive member 223 to stop moving to ensure that the two calibration plates 222 can accurately stay in a position that meets the operating requirements, ensuring that the stator punching can pass smoothly or be accurately limited, and avoiding interference and other problems caused by excessive movement.

[0042] In the present invention, since the push plate 214 needs to frequently move through the round steel to complete the stacking of the stator punching sheets, in order to reduce the wear of the push plate 214 on the surface of the round steel, a through hole for the round steel to pass through is opened on the push plate 214, 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.

[0043] The linear bearing can convert the sliding friction between the inner wall of the through hole and the round steel into rolling friction, significantly reducing the frictional resistance, ensuring that the push plate 214 moves smoothly during high-frequency stacking, and reducing the power loss caused by friction; at the same time, by reducing the wear of the round steel and the through hole, it indirectly avoids additional friction damage to the round steel surface caused by component deformation or jamming.

[0044] Furthermore, in a preferred embodiment of the present invention, the stator laminations are fed using a belt conveyor. When the belts are arranged in a single group, they are arranged along a path perpendicular to the stacking direction, with their conveying terminals positioned directly in front of or above 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 transports the laminations one by one to the feed area of ​​the stacking station. In this manner, a single belt can simultaneously feed two stacking assemblies 2. When the belts are arranged in two groups, both groups are arranged along a path parallel to the stacking direction and are independently configured for two stacking assemblies 2. The conveying terminal of each belt group precisely aligns with the feed port of the guide assembly 22 of the corresponding stacking assembly 2, with the conveying direction aligned with the stacking direction of the stator laminations. The two belt groups operate independently, conveying the stator laminations to the left and right stacking assemblies 2, respectively, with their respective drive motors and speed control mechanisms enabling independent control of the feeding speed.

[0045] The present invention also provides a method for stacking square stator sheets, using a square stator sheet stacking device, comprising the following steps: 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 to provide a symmetrical reference for subsequent stacking operations; Start the first driving member 223 of the guide assembly 22 to drive the two calibration plates 222 on the slide 221 toward each other until the distance between the opposing surfaces of the two calibration plates 222 matches the side length of the square stator punching. Then control the slide 221 to drive the guide assembly 22 to slide along the stacking direction to the initial position, so that the step 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 punching. Place the stator punchings to be laminated in the groove formed by the two calibration plates 222 and the push plate 214; Start the telescopic push rod 213 on the mounting frame 211, and the telescopic push rods 213 at both ends extend synchronously, pass through the holes of the push plate 214 and the stator punching in turn, and finally hit the positioning grooves at both ends of the round steel to achieve positioning and clamping of the four round steels; The telescopic sleeves 212 on both sides synchronously drive the push plates 214 to move closer to each other along the axial direction, pushing the stator punching sheets on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle; When the first set of stator punching sheets are stacked in place, the telescopic push rod 213 and the telescopic sleeve 212 are retracted and reset, and the stacking steps are repeated until the stacking height reaches the preset requirement. The stacked stator core is removed, and the entire stacking process is finally completed.

[0046] This method utilizes synchronous stacking at both ends, with stator laminations stacked from both ends of the round steel toward the center. The sliding distance of a single lamination is only half that of traditional single-end stacking, significantly reducing stacking time. Furthermore, the two-sided stacking components operate independently, enabling continuous material feeding, reducing waiting time and significantly improving overall production efficiency. The entire stacking process is coordinated by automated components, eliminating manual adjustments and positioning, reducing errors caused by human factors, alleviating operator workload, and improving production stability and consistency.

[0047] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A square stator punching stacking device, characterized in that: include: A workbench, and two stacking assemblies symmetrically arranged on both sides of a stacking station on the workbench, each of the stacking assemblies comprising: A top driving assembly includes a mounting frame provided on the workbench, and a telescopic sleeve and a plurality of telescopic ejector rods installed on a side wall of the mounting frame facing the stacking station; A guide assembly is slidably disposed between the stacking station and the top-to-top drive assembly along the stacking direction, comprising a slide, two calibration plates, and a first drive member, wherein the two calibration plates are respectively located on both sides of the stator punching sheet, and the first drive member is mounted on the slide and is used to drive the two calibration plates toward or away from each other; Wherein, step grooves are provided on the opposite surfaces of the two calibration plates, and a push plate is provided at the free end of the telescopic sleeve, and the telescopic sleeve drives the push plate to be embedded in the step groove to form a groove for placing the stator punching sheet; The two telescopic push rods located on the same axis pass through the push plate and the stator punching in sequence, and respectively press against the positioning grooves at both ends of the round steel, and the two telescopic sleeves respectively drive the two push plates to approach each other along the axial direction, and stack the two stator punchings on the round steel from both ends.

2. The square stator punching stacking device according to claim 1, characterized in that: A second driving member is provided on a side wall of the mounting frame facing away from the telescopic sleeve; The telescopic sleeve includes an outer sleeve fixed to the side wall of the mounting frame, and a piston assembly coaxially slidably arranged inside the outer sleeve; The driving end of the second driving member passes through the mounting bracket and is connected to the cylinder body of the piston assembly. A support plate is provided at the end of the piston rod of the piston assembly. The push plate is provided on the end surface of the support plate facing the stator punching sheet.

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

4. The square stator punching stacking device according to claim 1, characterized in that: The workbench is equipped with a sliding assembly that supports and drives the mounting frame to slide along the stacking direction, and the sliding assembly includes: Two side baffles are arranged on both sides of the top driving assembly along the stacking direction; Two guard plates, the mounting frame is formed by bending and extending the two side edges 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 enables the guard plate to slide along the stacking direction and be arranged on the baffle.

5. The square stator punching stacking device according to claim 1, characterized in that: A guide sleeve is provided at the end of the round steel; The guide sleeve gradually converges inwards toward the telescopic push rod to form a diameter-reducing section; The diameter of the large diameter end of the reducing section is equal to the diameter of the round steel, and the small diameter end of the reducing section is embedded in the tapered hole of the driving end of the telescopic push rod.

6. The square stator punching stacking device according to claim 1, characterized in that: A guide plate is provided on a side of the calibration plate facing the stacking station, and the distance between two guide plates in the same guide assembly is smaller than the distance between the two calibration plates; Open slots for round steel to pass through are provided on the opposite surfaces of the two guide plates; Wherein, the guide assembly further includes a third driving member for driving the slide to move back and forth along the stacking direction.

7. The square stator punching stacking device according to claim 1, characterized in that: A plurality of positioning blocks are provided on the side wall of the push plate facing the stator punching sheet; The plurality of groups of positioning blocks are arranged corresponding to the heat dissipation hole positions of the stator punching sheets.

8. The square stator punching stacking device according to claim 1, characterized in that: Positions on the slide corresponding to the two calibration plates are each provided with an in-place sensor, and the in-place sensor is used to detect the moving distance when the two calibration plates move away from each other.

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

10. A method for stacking square stator sheets, using the square stator sheet stacking device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Adjust the positions 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; Start the first driving member of the guide assembly to drive the two calibration plates on the slide toward each other until the distance between the opposing surfaces of the two calibration plates matches the side length of the square stator punching. Then control the slide to drive the guide assembly to slide along the stacking direction to the initial position, so that the step groove of the calibration plate is aligned with the push plate of the telescopic sleeve, forming a placement reference for the stator punching. Place the stator punching sheets to be laminated in the groove formed by the two calibration plates and the push plate; Start the telescopic push rod on the mounting frame, and the telescopic push rods at both ends extend synchronously, pass through the holes of the push plate and the stator punching in turn, and finally hit 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 move closer to each other along the axial direction, pushing the stator punching sheets on both sides toward the round steel and sliding along the round steel to achieve stacking from both ends to the middle; When the first set of stator punching sheets are stacked in place, the telescopic push rod and telescopic sleeve retract and reset, and the stacking steps are repeated until the stacking height reaches the preset requirement. The stacked stator core is removed, and the entire stacking process is finally completed.

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