A high-density laminated riveted structure for iron core

Abstract

This application discloses a high-density lamination riveting structure for iron cores, relating to the field of iron core lamination riveting technology. It includes several iron core laminations of uniform size and shape, and a placement seat for holding the laminations. Each lamination has several teeth arranged circumferentially, with a riveting groove on one side and a riveting protrusion on the other side that mates with the riveting groove of an adjacent lamination. The placement seat has a column that fits into pre-drilled holes in the laminations. A riveting pressing seat corresponding to each lamination is located above the placement seat. A driving component is located on top of the riveting pressing seat to drive it downwards. The placement seat has a stop plate that abuts against the gap sidewalls between the stacked teeth. The driving component drives the riveting pressing seat downwards to rivet the stacked iron core laminations, and the stop plate abuts against the gap sidewalls of the teeth, ensuring the stacked iron core laminations are aligned and achieving good riveting performance, resulting in a lamination with excellent density and structural stability.

Description

Technical Field

[0001] This application relates to the field of iron core lamination riveting technology, and in particular to a high-density lamination riveting structure for iron cores. Background Technology

[0002] In the power and electronics industries, the iron core, as a crucial magnetic conductor, directly impacts the efficiency and stability of equipment such as transformers and motors. As the industry's demands for miniaturization and higher efficiency continue to increase, higher standards are being set for the compactness of the iron core. A highly compact iron core lamination structure can effectively reduce air gaps in the magnetic circuit, lower magnetic reluctance and eddy current losses, and improve the magnetic permeability of the iron core.

[0003] In existing iron core lamination riveting structures, a riveting structure is usually set on the laminations, and the laminations are connected into one piece by riveting process. For example, some structures have protrusions and grooves on the edges of the laminations. The cooperation of the protrusions and grooves is used to position and initially connect the laminations, and then the laminations are pressed and riveted by an external riveting device.

[0004] Regarding the aforementioned technologies, the inventors believe that deviations during the riveting process can affect the riveting quality of the stacked pieces. Utility Model Content

[0005] The purpose of this application is to provide a high-density lamination riveting structure for iron cores, so as to improve the problem that the riveting quality of laminations is affected by the deviation in lamination stacking during the riveting process.

[0006] This application provides a high-density laminated riveting structure for an iron core, employing the following technical solution:

[0007] A high-density lamination riveting structure for iron cores includes several iron core laminations of the same size and shape, and a placement seat for placing the iron core laminations. Several toothed plates are arranged circumferentially on the iron core laminations. A riveting groove is opened on one side of each toothed plate, and a riveting protrusion that mates with the riveting groove of an adjacent iron core lamination is provided on the other side of each toothed plate. The placement seat is provided with a column that fits into a pre-drilled hole in the iron core lamination. A riveting pressing seat corresponding to the iron core lamination is provided above the placement seat. A driving component for driving the riveting pressing seat to press down is provided on the top of the riveting pressing seat. The placement seat is provided with a stop plate that abuts against the side wall of the gap between the stacked toothed plates.

[0008] By adopting the above technical solution, the driving component drives the riveting seat to press down and rivet the stacked iron core laminations, and the riveting protrusions and riveting grooves between the stacked iron core laminations are tightly riveted; the abutment plate presses against the toothed gap sidewall of the iron core laminations to ensure that the stacked iron core laminations are in the same position, so that the riveting performance laminations have good density and structural stability.

[0009] Optionally, the placement base is slidably provided with a movable frame facing the direction of the iron core laminations, the abutment is rotatably connected to the end of the movable frame near the iron core laminations, the movable frame is rotatably provided with a lead screw along its length, the lead screw is threadedly connected to a movable block, the side of the abutment away from the iron core laminations is rotatably provided with a support rod rotatably connected to the movable block, the movable frame is provided with a drive motor to drive the lead screw to rotate, and the placement base is provided with a second drive component to drive the movable frame to move.

[0010] By adopting the above technical solution, the drive motor drives the lead screw to rotate, causing the moving block to move. The moving block pushes the abutment plate through the support rod to abut against the toothed gap side wall of the iron core lamination, so that the stacking position of the iron core lamination is consistent and deviations occur between adjacent iron core laminations.

[0011] Optionally, the height of the abutment does not exceed the height of the stacked iron core sheets, the width of the end of the movable frame near the iron core sheets is smaller than the spacing between adjacent teeth of the same iron core sheet, and the bottom of the riveting seat has a clearance hole corresponding to the column.

[0012] By adopting the above technical solution, the height of the abutment does not exceed the height of the stacked iron core laminations, thus avoiding interference with the riveting of the top of the laminations during the riveting process. The width of the end of the moving frame near the iron core lamination is smaller than the spacing between adjacent teeth of the same iron core lamination, which facilitates the driving component two to drive the moving frame to remove the abutment from the gap position of the teeth after the riveting seat presses down on the iron core laminations, thus preventing interference from the abutment during the riveting process.

[0013] Optionally, the riveting protrusions and riveting grooves on adjacent teeth on the same iron core lamination are arranged in opposite directions, so that the riveting protrusions on two adjacent teeth face the riveting seat and the placement seat respectively. The bottom of the riveting seat is provided with a positioning block corresponding to the riveting groove and a positioning groove corresponding to the riveting protrusion. The positioning block and positioning groove are also provided on the upper surface of the placement seat corresponding to the riveting groove and the riveting protrusion.

[0014] By adopting the above technical solution, the riveting protrusions on two adjacent toothed plates face the riveting seat and the placement seat respectively, so that the connection between the upper and lower adjacent iron core laminations is interlocked and matched, which enhances the interlayer connection strength and prevents the lamination group from separating under axial load. The positioning blocks and positioning grooves on the riveting seat and the placement seat form bidirectional positioning with the riveting groove and the riveting protrusion respectively, so as to achieve precise alignment of the lamination group before riveting and ensure the positional accuracy of each riveting point.

[0015] Optionally, the riveting protrusion has a relief groove along its length. The relief groove deforms under force when two adjacent iron core laminations are riveted, causing the outer circumference of the riveting protrusion to shrink in the riveting groove.

[0016] By adopting the above technical solution, the groove is deformed by force when two adjacent iron core laminations are riveted together, causing the outer circumference of the riveting protrusion to shrink in the riveting groove. This transforms the fit between the riveting protrusion and the riveting groove from an initial clearance fit to a tight interference fit, increasing interlayer friction and mechanical interlocking force, and preventing the laminations from loosening due to vibration or electromagnetic force after riveting.

[0017] Optionally, the edge of the riveting protrusion is set in an arc.

[0018] By adopting the above technical solution, the edge of the riveting protrusion is set in an arc shape, so that the riveting protrusion and the inner wall of the riveting groove are in uniform contact during the deformation process, ensuring the consistency of the shrinkage of the outer circumference and further improving the tightness of the fit after riveting.

[0019] Optionally, the circumferential sidewall of the riveting seat is provided with a plurality of arc plates that fit against the edge of the toothed piece, and the placement seat is provided with a limiting groove corresponding to the arc plates.

[0020] By adopting the above technical solution, the arc plate is set to fit the edge of the toothed plate, which can form a continuous arc support for the outer periphery of the lamination group, preventing the toothed plate from expanding outward or shrinking inward due to uneven radial pressure during the riveting process, and ensuring the circumferential accuracy and dimensional stability of the iron core lamination group.

[0021] Optionally, the arc plates are evenly spaced around the riveting seat, and the gap between the arc plates is larger than the width of the movable frame. The arc plates are provided with partitions corresponding to the gap between adjacent toothed plates of the same iron core lamination.

[0022] By adopting the above technical solution, the gap between the arc plates is larger than the width of the moving frame. After the riveting seat contacts the iron core stack, the moving frame can exit the gap position of the iron core stack. The baffle on the arc plate continues to restrict the position of the teeth of the iron core stack after the moving frame moves away from the iron core stack with the abutment plate, preventing the iron core stack from shifting during the riveting process.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The driving component drives the riveting seat to press down and rivet the stacked iron core laminations. The riveting protrusions and riveting grooves between the stacked iron core laminations are tightly riveted together. The abutment plate presses against the toothed sidewalls of the iron core laminations to ensure that the stacked iron core laminations are in the same position, so that the riveting performance of the laminations is good in terms of density and structural stability.

[0025] 2. The relief groove deforms under stress when two adjacent iron core laminations are riveted together, causing the outer circumference of the riveting protrusion to shrink in the riveting groove. This transforms the fit between the riveting protrusion and the riveting groove from an initial clearance fit to a tight interference fit, increasing interlayer friction and mechanical interlocking force, and preventing the laminations from loosening due to vibration or electromagnetic force after riveting.

[0026] 3. The arc plate is set to fit the edge of the toothed plate, which can form a continuous arc support for the outer periphery of the lamination group, preventing the toothed plate from expanding outward or shrinking inward due to uneven radial pressure during the riveting process, and ensuring the circumferential accuracy and dimensional stability of the iron core lamination group. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of a high-density laminated riveted structure with an iron core.

[0028] Figure 2 It is a partial cross-sectional view of the stacked iron core laminations and their mounting base;

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0030] Figure 4 This is a partial schematic diagram of the bottom structure of the rivet holder.

[0031] In the diagram, 1. Iron core laminations; 11. Toothed plate; 12. Riveting groove; 13. Riveting protrusion; 14. Relief groove; 2. Placement seat; 21. Column; 22. Limiting groove; 3. Riveting seat; 31. Relief hole; 32. Positioning block; 33. Positioning groove; 34. Arc plate; 35. Partition plate; 4. Drive component one; 5. Support plate; 51. Moving frame; 52. Lead screw; 53. Moving block; 54. Support rod; 55. Drive motor; 56. Drive component two. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.

[0033] A high-density laminated riveted structure for an iron core, as shown in the reference Figure 1 , Figure 2 and Figure 3The assembly includes several iron core laminations 1 of uniform size and shape, and a metal base 2 for placing the iron core laminations 1. A metal column 21 is threaded onto the base 2. Several uniformly spaced, integrally formed toothed plates 11 are present on the circumference of each iron core lamination 1. A riveting groove 12 is formed on one side of each toothed plate 11, and a riveting protrusion 13 is formed on the other side of each toothed plate 11 to mate with the riveting groove 12 of the adjacent iron core lamination 1. Both the riveting protrusion 13 and the riveting groove 12 are formed by stamping during the stamping process of the iron core laminations 1. The column 21 passes through pre-drilled holes in the iron core laminations 1 to position the stacked iron core laminations 1. A frame is fixed above the base 2 with bolts to secure the riveted plates. The pressure seat 3 is installed at the bottom of the frame so that the pressure seat 3 is above the placement seat 2. The driving component 4 is installed on the frame at the top of the pressure seat 3. The driving component 4 is a hydraulic cylinder that is sealed and connected to the oil circuit. The driving component 4 drives the pressure seat 3 to press down to rivet the stacked iron core laminations 1, so that the riveting protrusions 13 and riveting grooves 12 between the stacked iron core laminations 1 are tightly riveted. The placement seat 2 is provided with abutment plate 5 that abuts against the gap sidewall between the stacked toothed pieces 11. The abutment plate 5 abuts against the gap sidewall of the laminations to ensure that the stacked iron core laminations 1 are accurately stacked. During the riveting process, the layers of the lamination group are tightly attached, which significantly improves the overall density and structural stability of the iron core.

[0034] Reference Figure 3 A metal movable frame 51 is slidably connected to the placement seat 2 towards the iron core lamination 1 via a slide groove. The abutment 5 is rotatably hinged to the end of the movable frame 51 near the iron core lamination 1. A lead screw 52 is rotatably connected to the movable frame 51 along its length via a bearing. A movable block 53 is threaded onto the lead screw 52. A support rod 54 is rotatably hinged to the side of the abutment 5 away from the iron core lamination 1. The end of the support rod 54 away from the abutment 5 is rotatably hinged to the movable block 53. A drive screw 52 is mounted on the movable frame 51 to rotate. The drive motor 55 is electrically connected to the power supply. The drive motor 55 is a servo motor. The drive motor 55 drives the lead screw 52 to rotate, causing the moving block 53 to move. The moving block 53 pushes the abutment 5 against the gap side wall of the iron core stack 1 through the support rod 54, so that the stacking position of the iron core stack 1 is consistent. The second drive component 56, which drives the moving frame 51 to move, is installed on the placement seat 2. The second drive component 56 is a drive cylinder connected to the air circuit. The second drive component 56 drives the moving frame 51 to enter and exit the gap position of the iron core stack 1.

[0035] Reference Figure 3 and 4The height of the abutment 5 does not exceed the height of the stacked iron core laminations 1 to avoid interference with the riveting of the top of the laminations during the riveting process. The width of the end of the moving frame 51 near the iron core lamination 1 is smaller than the spacing between adjacent toothed plates 11 of the same iron core lamination 1. The bottom of the riveting seat 3 has a clearance hole 31 corresponding to the column 21 to facilitate the smooth pressing down of the riveting seat 3. The riveting protrusions 13 and riveting grooves 12 on adjacent toothed plates 11 of the same iron core lamination 1 are arranged in opposite directions, so that the riveting protrusions 13 on the two adjacent toothed plates 11 face the riveting seat 3 and the placement seat 2 respectively, so that the upper and lower adjacent iron core laminations 1... The interlocking connections enhance the interlayer bonding strength and prevent interlayer separation of the laminated assembly under axial load. The bottom of the riveting seat 3 is provided with a positioning block 32 corresponding to the riveting groove 12 and a positioning groove 33 corresponding to the riveting protrusion 13. The positioning block 32 and positioning groove 33 are also provided on the upper surface of the placement seat 2, corresponding to the riveting groove 12 and the riveting protrusion 13. The positioning block 32 and positioning groove 33 on the riveting seat 3 and the placement seat 2 form a bidirectional positioning with the riveting groove 12 and the riveting protrusion 13, respectively, to ensure the positional accuracy of each riveting point, so that the axial pressure can be transmitted to each riveting point and improve the consistency of the overall riveting quality.

[0036] Reference Figure 3 The riveting protrusion 13 has a relief groove 14 along its length. The relief groove 14 deforms under force when two adjacent iron core laminations 1 are riveted, causing the outer circumference of the riveting protrusion 13 to shrink in the riveting groove 12. This changes the fit between the riveting protrusion 13 and the riveting groove 12 from an initial clearance fit to a tight interference fit, increasing interlayer friction and mechanical interlocking force, and preventing the laminations from loosening due to vibration or electromagnetic force after riveting. The edge of the riveting protrusion 13 is set with an arc. The arc structure can maintain uniform contact with the inner wall of the riveting groove 12 during deformation, ensuring the consistency of the shrinkage of the outer circumference, improving the tightness of the fit after riveting, and minimizing local gaps or poor contact caused by edge corners.

[0037] Reference Figure 4Several metal arc plates 34, which fit against the edges of the toothed pieces 11, are bolted to the circumferential side wall of the riveting base 3. A limiting groove 22 corresponding to the arc plates 34 is provided on the placement base 2. The limiting groove 22 restricts the radial position of the arc plates 34. The arc plates 34 are set to fit against the edges of the toothed pieces 11, forming a continuous arc-shaped support for the outer circumferential contour of the lamination assembly. This prevents the toothed pieces 11 from expanding outward or contracting inward due to uneven radial pressure during riveting, ensuring the circumferential accuracy and dimensional stability of the iron core lamination assembly 1. Qualitatively, the arc plates 34 are evenly spaced around the riveting seat 3, and the gap between the arc plates 34 is larger than the width of the moving frame 51. After the riveting seat 3 contacts the iron core stack 1, a sufficient gap is reserved to allow the moving frame 51 to exit the gap position of the iron core stack 1. The arc plates 34 are welded with partition plates 35 corresponding to the gap between the adjacent toothed plates 11 of the iron core stack 1. The partition plates 35 continue to prevent the iron core stack 1 from lateral displacement during the riveting process after the moving frame 51 moves away from the iron core stack 1 with the abutment plate 5.

[0038] The implementation principle of this application embodiment is as follows:

[0039] In actual operation, multiple iron core laminations 1 are placed on the placement seat 2 through the column 21. The moving frame 51 is pushed towards the gap position of the toothed plates 11 of the iron core laminations 1. The drive motor 55 drives the lead screw 52 to rotate, causing the moving block 53 to move and push the abutment plate 5 against the gap side wall of the toothed plates 11, so that the iron core laminations 1 are accurately placed. The drive component 4 drives the riveting seat 3 to move down to contact the iron core laminations 1. At this time, the moving frame 51 retracts the abutment plate 5 and pushes it out of the gap position of the toothed plates 11. The arc plate 34 on the side wall of the riveting seat 3 fits against the toothed plates 11 of the iron core laminations 1. 1. The edge moves downward, and the riveting seat 3 rivets the stacked iron core laminations 1. The upper and lower adjacent iron core laminations 1 are riveted together by staggered riveting protrusions 13 and riveting grooves 12 facing different directions, which enhances the interlayer connection strength. The clearance groove 14 of the riveting protrusion 13 is deformed by force when two adjacent iron core laminations 1 are riveted, so that the outer circumference of the riveting protrusion 13 shrinks in the riveting groove 12, so that the fit between the riveting protrusion 13 and the riveting groove 12 changes from the initial clearance fit to a tight interference fit, improving the tightness of the fit after riveting. The pressing action of the abutment plate 5 on the side wall of the lamination gap ensures that the stacked iron core laminations 1 are in the same position, ensuring that each layer of the lamination group is tightly fitted during the riveting process, which significantly improves the overall density and structural stability of the iron core.

[0040] 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 high-density lamination structure of a core, characterized by: The device includes several iron core laminations (1) of the same size and shape and a placement seat (2) for placing the iron core laminations (1). Several toothed pieces (11) are arranged in the circumferential direction of the iron core laminations (1). A riveting groove (12) is provided on one side of the toothed piece (11), and a riveting protrusion (13) is provided on the other side of the toothed piece (11) to cooperate with the riveting groove (12) of the adjacent iron core lamination (1). The placement seat (2) is provided with a column (21) that fits into the hole reserved in the iron core lamination (1). A riveting seat (3) corresponding to the iron core lamination (1) is provided above the placement seat (2). A driving component (4) for driving the riveting seat (3) to press down is provided on the top of the riveting seat (3). The placement seat (2) is provided with a stop plate (5) that abuts against the gap sidewall between the stacked toothed pieces (11).

2. A high-density lamination riveted structure of a core according to claim 1, characterized in that: The placement base (2) is slidably provided with a movable frame (51) facing the iron core lamination (1). The abutment (5) is rotatably connected to the end of the movable frame (51) near the iron core lamination (1). The movable frame (51) is rotatably provided with a lead screw (52) along its length. The lead screw (52) is threadedly connected to a movable block (53). The abutment (5) is rotatably provided with a support rod (54) rotatably connected to the movable block (53) on the side away from the iron core lamination (1). The movable frame (51) is provided with a drive motor (55) for driving the lead screw (52) to rotate. The placement base (2) is provided with a second drive component (56) for driving the movable frame (51) to move.

3. A high-density lamination structure of a core according to claim 2, wherein: The height of the abutment (5) does not exceed the height of the stacked iron core plates (1), the width of the movable frame (51) near the end of the iron core plate (1) is smaller than the spacing between adjacent toothed plates (11) of the same iron core plate (1), and the bottom of the rivet seat (3) is provided with a clearance hole (31) corresponding to the column (21).

4. The high-density lamination structure of a core according to claim 3, wherein: The riveting protrusions (13) and riveting grooves (12) on adjacent toothed plates (11) of the same iron core lamination (1) are arranged in opposite directions, so that the riveting protrusions (13) on two adjacent toothed plates (11) face the riveting seat (3) and the placement seat (2) respectively. The bottom of the riveting seat (3) is provided with a positioning block (32) corresponding to the riveting groove (12) and a positioning groove (33) corresponding to the riveting protrusion (13). The positioning block (32) and positioning groove (33) are also arranged on the upper surface of the placement seat (2) corresponding to the riveting groove (12) and the riveting protrusion (13).

5. A high-density lamination structure of a core according to claim 4, wherein: The riveting protrusion (13) has a relief groove (14) along its length direction. The relief groove (14) is deformed by force when two adjacent iron core laminations (1) are riveted, causing the outer circumference of the riveting protrusion (13) to shrink in the riveting groove (12).

6. A high-density lamination structure of a core according to claim 5, wherein: The edge of the riveting protrusion (13) is set in an arc.

7. A high-density lamination structure of a core according to claim 6, wherein: The circumferential sidewall of the rivet seat (3) is provided with a plurality of arc plates (34) that fit against the edge of the toothed piece (11), and the placement seat (2) is provided with a limiting groove (22) corresponding to the arc plate (34).

8. A high-density lamination structure of a core according to claim 7, wherein: The arc plates (34) are uniformly and spacedly arranged around the riveting seat (3), and the gap size between the arc plates (34) is greater than the width size of the moving frame (51), and the arc plates (34) are provided with the partition plates (35) corresponding to the gaps between the tooth plates (11) adjacent to the same core laminations (1).

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