Compaction device of motor iron core

Abstract

The compaction device comprises a bottom plate, a support is arranged on the bottom plate, a first driving part is arranged on the top face of the support in an inverted mode, and a pressing plate for compacting the iron core is arranged at the output end of the first driving part; a placement plate is arranged on the bottom plate and located under the first driving part, a center positioning column matched with a center hole of the iron core is arranged on the placement plate in a sliding mode in the vertical direction, the center positioning column penetrates through the placement plate and the bottom plate, a connecting plate is arranged at the end, away from the first driving part, of the center positioning column, and the connecting plate is provided with a plurality of elastic parts connected with the bottom plate; the placing plate and the center positioning column penetrate through the placing plate and the bottom plate, positioning of the center of the iron core can be kept in the whole compaction process, center deviation is reduced, the bottom connecting plate and the elastic piece play a role in buffering and self-adaptive adjustment, when the pressing plate is pressed downwards, and pressure changes, the elastic piece can absorb impact force, and the pressing plate is prevented from being damaged. Damage to the device or influence on the iron core precision due to rigid collision is reduced; and meanwhile, the elastic piece helps the center positioning column to reset after compaction is completed.

Description

Technical Field

[0001] This application relates to the field of motor core processing technology, and in particular to a compaction device for motor cores. Background Technology

[0002] As a critical component of an electric motor, the performance of the motor core directly affects its operating efficiency, stability, and lifespan. Motor cores are typically made by precision stamping and stacking numerous thin silicon steel sheets. The quality of this stacking is paramount. Loose stacking increases the magnetic reluctance of the core, leading to magnetic flux leakage, increased iron losses, reduced motor efficiency, and compromised reliability. To ensure a tight fit between the silicon steel sheets, a compaction device has been developed.

[0003] Existing compaction devices mainly consist of a hydraulic pump station, a hydraulic cylinder, a mold, and an intelligent control system. During operation, the motor core to be compacted is precisely placed in a specially designed mold. The hydraulic pump station delivers high-pressure oil to the hydraulic cylinder, driving the cylinder piston to generate a strong and stable axial thrust. This thrust is evenly applied to the surface of the core through the mold, forcing the silicon steel sheets to be compacted layer by layer.

[0004] Regarding the aforementioned technologies, the inventors believe that during the compaction process, iron chips are prone to misalignment and displacement in the central area, which leads to a decrease in the roundness, coaxiality, and other precision indicators of the iron core's central hole. Utility Model Content

[0005] The purpose of this application is to provide a compaction device for motor cores to improve the problem that silicon steel sheets are prone to misalignment and displacement in the central area during the compaction process.

[0006] This application provides a compaction device for motor cores, which adopts the following technical solution:

[0007] A compaction device for an electric motor core includes a base plate, a support frame on the base plate, a drive component inverted on the top surface of the support frame, and a pressure plate for compacting the core at the output end of the drive component. A placement plate is located directly below the drive component on the base plate. A central positioning post, adapted to the central hole of the core, is slidably mounted on the placement plate in the vertical direction. Both the placement plate and the base plate have positioning holes for the central positioning post to slide through. The central positioning post penetrates both the placement plate and the base plate. A connecting plate is located at the end of the central positioning post away from the drive component, and the connecting plate has several elastic elements connected to the base plate.

[0008] By adopting the above technical solution, the inverted drive component and pressure plate combination realizes the compaction function. The placement plate and the central positioning column penetrate through the placement plate and the bottom plate, which can maintain the positioning of the iron core center throughout the compaction process and reduce the center offset. The bottom connecting plate and elastic element play the role of buffering and adaptive adjustment. When the pressure plate is pressed down and the pressure changes, the elastic element can absorb the impact force, reducing the damage to the device or the impact on the iron core accuracy caused by rigid collision. At the same time, the elastic element helps the central positioning column to reset after compaction is completed.

[0009] Optionally, the inner wall of the positioning hole is provided with a plurality of ball bearings that contact the central positioning post.

[0010] By adopting the above technical solution, the ball bearings reduce the friction of the central positioning post during the sliding process, making the central positioning post move more smoothly as the iron core is pressed up and down. This ensures the timeliness and accuracy of the central positioning post in positioning the iron core's central hole, and helps to improve the forming accuracy of the iron core's central hole.

[0011] Optionally, the central positioning column includes a first column and a second column connected to the first column. The second column has several grooves along its length corresponding to the ball bearings. The connecting plate is located at the end of the second column away from the first column.

[0012] By adopting the above technical solution, the chute makes the rolling trajectory of the balls more regular, reducing the risk of the central positioning column shaking due to the random movement of the balls; on the other hand, it ensures that the central positioning column is subjected to uniform force during the lifting process, maintains the concentricity with the central hole of the iron core, and steadily improves the compaction quality.

[0013] Optionally, the elastic elements are arranged around the circumference of the column.

[0014] By adopting the above technical solutions, it is helpful to maintain the stability of the central positioning column during compaction, reduce the possibility of failure of elastic components or tilting of the central positioning column due to excessive local pressure, and indirectly maintain the high precision of the core center hole.

[0015] Optionally, the top surface of the column is provided with a cover plate that matches the outer diameter of the iron core, and the cover plate has a slot for inserting and fixing the column.

[0016] By adopting the above technical solution, the cover plate increases the contact area between the pressure plate and the iron core, which helps to improve the compaction quality of the iron core.

[0017] Optionally, an elastic pad is provided on the side of the cover plate near the placement plate.

[0018] By adopting the above technical solution, the elastic pad buffers the impact force between the cover plate and the iron core, avoiding damage to the iron core laminations due to hard contact; at the same time, the elastic pad helps to fix the iron core laminations, reducing lamination displacement caused by vibration and other factors, and ensuring the uniformity and accuracy of iron core compaction.

[0019] Optionally, a second driving component is horizontally arranged on both sides of the bracket, and a clamping plate that can abut against the iron core is provided at the output end of the second driving component. The clamping plate is arranged in the vertical direction and its length is adapted to the height of the stacked iron cores.

[0020] By adopting the above technical solution, the clamping plate can cover most of the side area of ​​the iron core, providing reliable lateral support, resisting the lateral deformation or misalignment of the iron core caused by the pressure of the clamping plate during the compaction process, and ensuring the overall compaction effect of the iron core.

[0021] Optionally, the clamping plate has an arc-shaped positioning groove on the side near the central positioning post that fits against the outer wall of the iron core.

[0022] By adopting the above technical solution, when the clamping plate holds the iron core, the arc-shaped positioning groove fits tightly with the outer wall of the iron core, positioning the radial position of the iron core, reducing the rotation or displacement of the iron core when subjected to lateral force, and improving the compaction accuracy of the iron core.

[0023] In summary, the present application includes at least one of the following beneficial technical effects of a compaction device for an electric motor core:

[0024] 1. The inverted drive unit and pressure plate assembly achieve the compaction function. The placement plate and central positioning column penetrate through the placement plate and the bottom plate, which can maintain the positioning of the iron core center throughout the compaction process and reduce center offset. The bottom connecting plate and elastic element play a role in buffering and self-adjustment. When the pressure plate is pressed down or the pressure changes, the elastic element can absorb the impact force, reducing the damage to the device or the impact on the iron core accuracy caused by rigid collisions. At the same time, the elastic element helps the central positioning column to reset after compaction is completed.

[0025] 2. The ball bearings reduce the friction of the center positioning post during the sliding process, making the center positioning post move more smoothly as the iron core is pressed up and down. This ensures the timeliness and accuracy of the center positioning post in positioning the center hole of the iron core, and helps to improve the forming accuracy of the center hole of the iron core.

[0026] 3. When the iron core is clamped by the clamping plate, the arc-shaped positioning groove fits tightly with the outer wall of the iron core, positioning the radial position of the iron core, reducing the rotation or displacement of the iron core when subjected to lateral force, and improving the compaction accuracy of the iron core. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the compaction device for the motor core;

[0028] Figure 2 This is a schematic diagram illustrating the placement plate structure in the embodiment;

[0029] Figure 3 This is a schematic diagram illustrating the cover plate structure in the embodiment.

[0030] In the diagram, 1 is the base plate; 2 is the bracket; 3 is the drive component one; 31 is the pressure plate; 4 is the placement plate; 41 is the positioning hole; 411 is the ball bearing; 5 is the center positioning post; 51 is the post one; 52 is the post two; 521 is the slide groove; 6 is the connecting plate; 61 is the elastic element; 7 is the cover plate; 71 is the insertion groove; 72 is the elastic pad; 8 is the drive component two; 81 is the clamping plate; 811 is the arc-shaped positioning groove. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0032] A compaction device for an electric motor core, referring to Figure 1 The system includes a horizontally placed base plate 1, which is fixedly connected to a support 2 by welding. The support 2 extends upward perpendicularly to the base plate 1. A drive component 3 is fixedly mounted on the top surface of the support 2 by bolts. In this embodiment, the drive component 3 can be a hydraulic cylinder. The piston rod of the drive component 3 serves as the output end. A pressure plate 31 for compacting an iron core is fixedly mounted on the end of the piston rod by welding. The pressure plate 31 is a flat metal plate.

[0033] Reference Figure 1 The support 2 has two horizontally symmetrically arranged driving components 8 on both sides. Driving components 8 can also be hydraulic cylinders for precise control of the movement of the clamping plate 81. The cylinder body of driving component 8 is fixedly connected to the side of the support 2 by bolts. Its piston rod serves as the output end, and a clamping plate 81 that abuts against the iron core is welded to the end of the piston rod. The clamping plate 81 is elongated in the vertical direction, and its length is adapted to the height of the stacked iron cores, ensuring effective clamping throughout the entire height range of the stacked iron cores. An arc-shaped positioning groove 811, which fits against the outer wall of the iron core, is machined on the side of the clamping plate 81 closest to the central positioning post 5. The radius of curvature of the arc-shaped positioning groove 811 precisely matches the outer diameter of a common motor iron core.

[0034] Reference Figure 1 , Figure 2 A placement plate 4 is welded to the bottom plate 1 directly below the drive component 3. A central positioning post 5, which is adapted to the central hole of the iron core, is slidably disposed on the placement plate 4 in the vertical direction. The central positioning post 5 passes through the placement plate 4 and the bottom plate 1. Both the placement plate 4 and the bottom plate 1 are provided with positioning holes 41 for the central positioning post 5 to slide. Several ball bearings 411 that contact the central positioning post 5 are embedded in the inner side wall of the positioning hole 41. In this embodiment, four ball bearings 411 are preferred. The ball bearings 411 can reduce the friction of the central positioning post 5 during the sliding process.

[0035] Reference Figure 1A connecting plate 6 is welded to the end of the central positioning post 5 away from the driving component 3. The connecting plate 6 has several elastic elements 61 connected to the base plate 1 via hooks. In this embodiment, four elastic elements are preferred. The central positioning post 5 includes a first post 51 and a second post 52 connected to the first post 51. The first post 51 and the second post 52 are welded together. The elastic elements 61 are arranged circumferentially around the second post 52, and springs can be used for the elastic elements 61. The second post 52 has several grooves 521 along its length corresponding to the ball bearings 411. The grooves 521 provide rolling space for the ball bearings 411, ensuring good cooperation between the central positioning post 5 and the ball bearings 411 during lifting and lowering. The connecting plate 6 is located at the end of the second post 52 away from the first post 51.

[0036] Reference Figure 1 , Figure 3 The top surface of column 51 is provided with a cover plate 7 that is adapted to the outer diameter of the iron core. The cover plate 7 is a circular metal plate with a diameter slightly larger than the outer diameter of the iron core, which can cover the top surface of the iron core. The cover plate 7 has an insertion groove 71 for column 51 to be inserted and fixed. An elastic pad 72 is attached to the side of the cover plate 7 near the placement plate 4. The elastic pad 72 can be a rubber pad. During the compaction process, the elastic pad 72 can buffer the impact force between the cover plate 7 and the iron core.

[0037] The implementation principle of this application embodiment is as follows:

[0038] In practical use, the motor cores are stacked on the placement plate 4, and the cores are fitted onto the central positioning post 5, thereby achieving the positioning of the central positioning post 5 with the center hole of the core. The cover plate 7 is engaged and installed. Then, the two drive components 8 on both sides of the bracket 2 are activated simultaneously. The piston rod of the drive component 8 extends and pushes the clamping plate 81 of the arc-shaped positioning groove 811 to push the core from both sides until the cores are aligned and the two clamping plates 81 are reset. Then, the drive component 3 is activated, and the piston rod of the hydraulic cylinder presses down the pressure plate 31. The central positioning post 5 overcomes the elastic force of the elastic element 61 and moves down, relying on the ball 411 and the sliding groove 521 to maintain concentricity with the center hole of the core, providing precise positioning support. After the pressure plate 31 reaches the predetermined stroke and compaction is completed, the drive component 3 is reset. The cover plate 7 is removed and the core is taken out. This helps to reduce the phenomenon of misalignment and displacement of the core chip in the central area during the compaction process.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A compaction device for an electric motor core, characterized in that: The system includes a base plate (1), a bracket (2) on the base plate (1), a drive component (3) on the top surface of the bracket (2) with its top surface inverted, and a pressure plate (31) for pressing the iron core on the output end of the drive component (3); a placement plate (4) is provided on the base plate (1) directly below the drive component (3), and a center positioning post (5) adapted to the center hole of the iron core is slidably provided on the placement plate (4) in the up-down direction; both the placement plate (4) and the base plate (1) are provided with positioning holes (41) for the center positioning post (5) to slide; the center positioning post (5) is provided through the placement plate (4) and the base plate (1); a connecting plate (6) is provided on the end of the center positioning post (5) away from the drive component (3); and the connecting plate (6) is provided with several elastic elements (61) connected to the base plate (1).

2. The compaction device for a motor core according to claim 1, characterized in that: The inner wall of the positioning hole (41) is provided with a number of ball bearings (411) that are in contact with the central positioning post (5).

3. The compaction device for a motor core according to claim 2, characterized in that: The central positioning column (5) includes a first column (51) and a second column (52) connected to the first column (51). The second column (52) has several grooves (521) corresponding to the ball (411) along its length direction. The connecting plate (6) is located at the end of the second column (52) away from the first column (51).

4. The compaction device for a motor core according to claim 3, characterized in that: The elastic element (61) is arranged around the circumference of the second column (52).

5. The compaction device for a motor core according to claim 3, characterized in that: The top surface of the column (51) is provided with a cover plate (7) that is compatible with the outer diameter of the iron core. The cover plate (7) has a slot (71) for the column (51) to be inserted and fixed.

6. The compaction device for a motor core according to claim 5, characterized in that: An elastic pad (72) is provided on the side of the cover plate (7) near the placement plate (4).

7. The compaction device for a motor core according to claim 1, characterized in that: The bracket (2) has two driving components (8) arranged horizontally on both sides. The output end of the driving component (8) is provided with a clamp (81) that can abut against the iron core. The clamp (81) is arranged in the vertical direction and its length is adapted to the height of the iron core stack.

8. The compaction device for a motor core according to claim 7, characterized in that: The clamping plate (81) has an arc-shaped positioning groove (811) on the side near the central positioning post (5) that fits against the outer wall of the iron core.

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