JP5322138B2 - Laminated iron core - Google Patents

Description

The present invention may, for example, relates to a laminated core used in the stator of the motor relates to a laminated core especially in combination through the connecting portion of laminated core segments divided for each magnetic pole portion of the yoke portion.

Winding around the magnetic poles of the laminated core is facilitated by assembling the laminated core from the divided laminated core and can be wound with high density. The divided laminated iron core is formed, for example, by caulking and laminating divided iron core pieces obtained by dividing a yoke (more precisely, a yoke piece) for each magnetic pole piece. The split laminated iron cores are connected to each other by connecting portions formed at both ends to produce an annular laminated iron core. And it is important for the divided laminated iron cores to be connected with good workability, to be strongly connected in strength, and to be connected with good shape accuracy, and some have been proposed heretofore.

For example, in the laminated iron core described in Patent Document 1, as shown in FIGS. 5A and 5B, there are thick concave portions 64 at both ends of a divided laminated iron core 61 obtained by dividing the laminated iron core 60 into a plurality of parts. The connecting portions 62 and 63 having the convex portions 65 are formed so that the connecting work can be easily performed. In addition, 68 shows a magnetic pole part and 69 shows a yoke part.
Further, in Patent Document 2, as shown in FIG. 6, a comb-like shape in which projecting bent pieces 71 and cutout portions 72 that protrude to the outer peripheral surface end side of a core block (synonymous with a divided laminated iron core) 70 are alternately provided. The portions 73 and 74 are formed, the adjacent core block 70 and the comb-like portions 73 and 74 are connected to each other, and the upper or lower protruding bent piece 71 is bent and inserted into the groove 75 to be connected. ing. According to this, it is said that the contact surface of the core block 70 can be brought into close contact with each other, and welding or the like need not be used. In addition, 76 shows a magnetic pole part and 77 shows a division | segmentation yoke part.

JP-A-10-75552 JP 2000-295801 A

However, since the connecting portions 62 and 63 of the split laminated core 61 described in Patent Document 1 are simple irregularities formed by the difference in length of the split yoke pieces of the stacked split core pieces, the connection strength is sufficient. Not strong.
Moreover, in patent document 2, after connecting the core blocks 70 by interposing the comb-shaped parts 73 and 74, the protrusion bending piece 71 must be bent and put into the groove part 75, and manufacture of a laminated iron core is carried out. Extra time is required. Moreover, since the comb-shaped parts 73 and 74 used as a connection part exist only in the outer peripheral surface side of the core block 70, there exists a possibility that connection strength may not become strong.

The present invention has been made in view of such circumstances, and an object of the present invention is to obtain a laminated core composed of divided laminated cores that can easily connect the divided laminated cores with good shape accuracy and strong connection strength.

The laminated iron core according to the present invention that meets the above-mentioned object is a predetermined core in which a divided core piece obtained by dividing a yoke (more precisely, an annular yoke piece) into one magnetic pole piece is caulked and laminated up to a predetermined number via a caulking portion. In the laminated core formed in an annular shape by connecting the number of divided laminated cores through the connecting portions formed on both sides of the adjacent divided laminated cores,
The split iron core pieces are provided on both sides of the split yoke piece portion with edged recesses having recesses that are notched in the circumferential direction leaving the radially outer and inner edges, and circles leaving the radially outer and inner edges. Each of the connecting portions formed on both sides of the split laminated iron core includes a plurality of the edged recesses and the edged protrusions. The concave and convex portions are both formed in the radial direction of the divided yoke portion by laminating alternately one by one,
The width of the bottom of the recess and the protrusion in plan view is in the range of 0.4 to 0.8 times the radial width of the split yoke piece, and the width of the recess and the protrusion, respectively. edge is radially inner and radially outer Ri collinear near passing through the center position of the radius of curvature of the dividing yoke portion, wherein each of the laminated core segments are made the same shape, the laminated core segments are A magnetic pole portion having a split yoke portion; a magnetic pole shaft portion integrally provided on the inner side of the split yoke portion; and a magnetic pole tooth portion provided on an inner side in the radial direction of the magnetic pole shaft portion; The upper and lower corners are rounded.

Here, in the laminated iron core of the present invention, the recessed portion and the protruding portion may have a triangular shape or a semicircular shape with a rounded top portion in plan view.

The laminated core according to the present invention includes a predetermined number of divided laminated cores obtained by caulking and laminating a predetermined number of divided iron core pieces obtained by dividing a yoke into one magnetic pole piece on both sides of adjacent divided laminated cores. In the laminated core formed in an annular shape by connecting through the connecting portion formed in the outer peripheral portion, the split core pieces are indented in the circumferential direction on both sides of the split yoke piece, leaving the radially outer and inner edges. Each of which is formed on both sides of the split laminated iron core, each of which has a rimmed recess having a protrusion and a rimmed protrusion having a protrusion that protrudes in the circumferential direction with the radially outer and inner edges being left and matches the shape of the recess. The connecting portion is formed by alternately laminating a plurality of edged concave portions and edged convex portions, and the concave portions and the convex portions are formed together in the radial direction of the divided yoke portion. Rim of connecting part Coupled strongly each other mutually acceptable to the edge with convex portions and the edge with the recess of the connecting portion of the laminated core segments of adjacent recesses and the edge with convex portions come.
Moreover, since the edged concave part and the edged convex part are provided with edge portions that respectively contact and become the end portions of the divided laminated iron cores on the inner side and the outer side in the radial direction, the positions of the adjacent divided laminated iron cores are opposite to each other. It is determined by the position of the edge to be assembled, and the assembly becomes easy. Furthermore, the shape accuracy of the assembled laminated core is excellent.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIGS. 1A and 1B are a plan view and a front view, respectively, of the laminated core according to the first embodiment of the present invention, and FIG. 2 is a perspective view of a divided laminated core that constitutes the laminated core. 3 (A) and 3 (B) are plan views of the split core pieces constituting the split laminated core, and FIG. 4 is a perspective view of the split laminated core constituting the laminated core according to the second embodiment of the present invention. is there.

As shown in FIGS. 1A, 1B, and 2, the laminated core 10 according to the first embodiment of the present invention includes a plurality of (this embodiment) in which the yoke portion 11 is divided for each magnetic pole portion 12. 16 pieces) of the laminated cores 13 are connected via connecting parts 14 and 15. In addition, each magnetic pole part 12 is wound in the state of the split laminated iron core 13, and the final product (that is, the stator) is connected in a ring shape in a state where the winding is applied. Since it is well known, it is omitted in the following description.

The divided laminated iron core 13 has a divided yoke portion 16 whose outer periphery is arcuate and linear on the inside, and a magnetic pole portion 12 provided integrally at the inner center of the divided yoke portion 16. The portion 12 has a magnetic pole shaft portion 18 and an inner arc-shaped magnetic pole tooth portion 19. The central position of the radius of curvature of the magnetic pole tooth portion 19 and the central position of the radius of curvature of the divided yoke portion 16 are at the same position (hereinafter referred to as the rotation center). In this embodiment, the inner side of the divided yoke portion 16 is linear, but the inner side of the divided yoke portion may be arcuate and the center position of the radius of curvature may be the same as the center of rotation.

As shown in FIGS. 3A and 3B, the divided laminated iron core 13 is formed by alternately laminating a plurality of two types of divided iron core pieces 20, 21 having different shapes in plan view. The divided core pieces 20 and 21 are connected to each other. The divided core piece 20 has an edged convex part 24 on one side (right side) of the divided yoke piece part 23 and an edged concave part 25 on the other side (left side). The edged protrusion 24 has a protrusion 28 formed at the center of one end of the split yoke piece 23 so as to protrude in the circumferential direction leaving the edges 26 and 27 on the radially outer side and the inner side. . The projecting portion 28 has a triangular shape with a rounded top portion 29 (for example, an isosceles triangle, a right isosceles triangle, or other semicircular or semielliptical shapes). In this embodiment, the edges 26 and 27 are linear (that is, on the same straight line), and the center of rotation is on the extended line.

The edged concave portion 25 on the other side of the divided yoke piece portion 23 is formed in the center of the other end portion of the divided yoke piece portion 23 by notching in the circumferential direction leaving the edge portions 31 and 32 on the radially outer side and the inner side. It has the hollow part 33 made. The depression 33 has a triangular shape (for example, an isosceles triangle, a right-angled isosceles triangle, or other semicircular or semielliptical shape) with a rounded top (bottom) 34. In this embodiment, the edges 31 and 32 are linear (that is, on the same straight line), and the center of rotation is on the extended line. In addition, the protrusion part 28 and the hollow part 33 become the same shape, and when the edge parts 26 and 27 and the edge parts 31 and 32 of the adjacent division | segmentation iron core piece 20 contact | abut, the protrusion part 28 does not have a clearance gap in the hollow part 33. It has a shape to fit.

Since both ends of the divided iron core piece 21 (specifically, the divided yoke piece portion 23) are formed in left-right reverse symmetry (that is, reversely symmetric) with respect to the divided iron core piece 20, the same number is attached and detailed description thereof is given. Is omitted.
The split iron core pieces 20 and 21 are provided with caulking portions 22 at the same position in plan view. The caulking portion 22 uses a well-known half-cut caulking, but may be a well-known V-shaped caulking or cutting and raising caulking. In addition, in the divided core pieces 20 and 21 located at the lowermost part of the divided laminated core 13, a caulking hole having the same shape as that of the half-cut caulking is formed instead of the half-cut caulking.

The lengths of the bottoms of the protrusions 28 and the depressions 33 (that is, portions that are collinear with the edges 26 and 27 and the edges 31 and 32) are 0.4 to 0 of the radial width of the divided yoke piece 23. .8 times as long. In this embodiment, the projecting portion 28 and the recessed portion 33 are located at the center position in the radial direction of the divided yoke piece portion 23. You may form it eccentrically in the state left behind in the range 0.05 times or more of the width | variety of a direction. By configuring in this way, the positions of the adjacent laminated laminated cores 13 can be ensured by the edge portions 26 and 27 and the edge portions 31 and 32, and the edged convex portion 24 and the edged concave portion 25 can be fitted together. The adjacent divided laminated cores 13 can be closely fitted and magnetically coupled.

A latching groove 35 used for fixing the laminated core 10 to a jig is provided on the radially outer side in the center of the split yoke piece 23 of the split core pieces 20 and 21. The retaining groove 35 is a dovetail that is wider on the inside than the inlet. In addition, the split core pieces 20 and 21 are naturally provided with magnetic pole pieces 36 having the same shape as the magnetic pole portion 12 when the split laminated core 13 is viewed in plan.

In the caulking laminated split core pieces 20 and 21, for example, N pieces of divided core pieces 20 on either 2-10 sheets, One not a N sheets as many N pieces of divided core pieces 21 and which alternately Laminate to. Thereby, as shown in FIG. 2, comb-shaped connecting portions 14 and 15 having both edged concave portions and convex portions are formed in the radial direction of the divided yoke portion, and at the same height position of the divided laminated core 13. 1 is a concave portion and the other is a convex portion, and can be in close contact with each other to form a laminated core 10 as shown in FIG.

In the first embodiment, since the shape of the magnetic pole piece 36 of each of the divided core pieces 20 and 21 is the same, the magnetic pole shaft portion 18 and the magnetic pole tooth portion 19 of the divided laminated iron core 13 are vertically (divided core piece pieces). In the split laminated iron core 40 constituting the laminated iron core according to the second embodiment of the present invention shown in FIG. 4, the upper and lower sides of the magnetic pole shaft part 42 constituting the magnetic pole part 41 are straight. Edge corners are rounded. Further, the corners of the upper and lower ends of the magnetic pole tooth portion 43 located radially inside the magnetic pole portion 41 are formed rounded. As a result, when the magnetic pole portion 41 is wound, there is an advantage that the winding hits the corner of the magnetic pole shaft portion 42 or the magnetic pole tooth portion 43 and is not easily wrinkled.
Other components are the same as those of the divided laminated core 13 of the laminated core 10 according to the first embodiment, and thus the same reference numerals are given and detailed descriptions thereof are omitted.

(A), (B) is the top view and front view of a laminated iron core which concern on the 1st Embodiment of this invention, respectively. It is a perspective view of the division | segmentation laminated | stacked iron core which comprises the same laminated iron core. (A), (B) is a top view of the division | segmentation core piece which comprises the division | segmentation laminated | stacked iron core, respectively. It is a perspective view of the division | segmentation laminated | stacked iron core which comprises the laminated iron core which concerns on the 2nd Embodiment of this invention. (A), (B) is explanatory drawing of the laminated iron core which concerns on a prior art example. It is explanatory drawing of the laminated iron core which concerns on a prior art example.

10: laminated iron core, 11: yoke portion, 12: magnetic pole portion, 13: divided laminated iron core, 14, 15: connecting portion, 16: divided yoke portion, 18: magnetic pole shaft portion, 19: magnetic pole tooth portion, 20, 21: Split iron core piece, 22: crimped part, 23: split yoke piece part, 24: edged convex part, 25: edged concave part, 26, 27: edge part, 28: protruding part, 29: top part, 31, 32: edge part, 33: depression, 34: top, 35: retaining groove, 36: magnetic pole piece, 40: split laminated iron core, 41: magnetic pole, 42: magnetic pole shaft, 43: magnetic pole tooth

Claims (1)

A split iron core obtained by caulking and stacking a predetermined number of split core pieces obtained by splitting the yoke into one magnetic pole piece via a caulking portion is connected to the connecting portions formed on both sides of the adjacent split cores. In the laminated iron core that is connected through the ring,
The split iron core pieces are provided on both sides of the split yoke piece portion with edged recesses having recesses that are notched in the circumferential direction leaving the radially outer and inner edges, and circles leaving the radially outer and inner edges. Each of the connecting portions formed on both sides of the split laminated iron core includes a plurality of the edged recesses and the edged protrusions. The concave and convex portions are both formed in the radial direction of the divided yoke portion by laminating alternately one by one,
The width of the bottom of the recess and the protrusion in plan view is in the range of 0.4 to 0.8 times the radial width of the split yoke piece, and the width of the recess and the protrusion, respectively. edge is radially inner and radially outer Ri collinear near passing through the center position of the radius of curvature of the dividing yoke portion, wherein each of the laminated core segments are made the same shape, the laminated core segments are A magnetic pole portion having a split yoke portion; a magnetic pole shaft portion integrally provided on the inner side of the split yoke portion; and a magnetic pole tooth portion provided on an inner side in the radial direction of the magnetic pole shaft portion; A laminated iron core characterized in that corners of upper and lower ends are rounded .

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