JP2010041893A - Laminated fixed core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated fixed core which is less apt to be affected by residual compression thermal stresses, even if split-laminated cores are welded to each other and which is capable of suppressing axial positional displacement, while preventing a positional displacement in the radial direction of the laminated fixed core, in the laminated fixed core constituted by annularly combining a plurality of the split-laminated cores. <P>SOLUTION: In a plurality of iron core pieces each provided with a yoke part and a tooth part having a protruding part and a recessed part are stacked, by engaging the protruding parts and the recessed parts with each other to structure the split laminated cores, a plurality of these split-laminated cores are combined annularly to form the laminated fixed core 1, and in this laminated fixed core, at least one piece of the protruding part of a plurality of iron core pieces constituting each split-laminated core is engaged with the recessed part of the yoke part of the iron core piece of an adjacent split-laminated core. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laminated fixed iron core.

  Conventionally, the technique of the split iron core for improving the coil space factor wound around the magnetic pole part of a stator has prevailed, and one laminated fixed iron core is constituted by combining a plurality of split laminated iron cores.

Japanese Patent Laying-Open No. 2007-60877 (FIG. 1, paragraph 0005)

When manufacturing a laminated fixed core by assembling a plurality of divided laminated cores, the conventional technique of welding at least one adjacent divided laminated core is welded on the outer peripheral side of a joint that joins adjacent divided laminated cores together. Due to the heat generated during the process, a residual compressive thermal stress is generated in the direction where the joint is drawn to the seam between the divided laminated cores with respect to the iron core. Due to this residual compressive thermal stress, the roundness of the stator deteriorated.
Therefore, as an improvement measure, a laminated fixed core having a shape that does not require welding as in Patent Document 1 has been proposed.
In the prior art described in Patent Document 1, all the coupling portions are fitted and assembled. The assembled divided laminated core group is put into a case and shrink-fitted or directly press-fitted into the case. However, an axial displacement of the laminated fixed core may occur between the divided laminated cores during operation. In order to prevent this, it is necessary to temporarily fix the combined divided laminated core group so as not to move. However, since the jig that fixes both ends of the divided laminated core group in the axial direction cannot be inserted into the case, unless a special jig that can be fixed only at one end is used, the laminated fixed core between the laminated laminated cores in the axial direction Misalignment cannot be prevented.
As described above, in the invention according to Patent Document 1, since all the laminated laminated cores are fitted to form the laminated fixed iron core, each divided laminated iron core is not misaligned in the radial direction of the laminated fixed iron core, The roundness of the laminated fixed iron core can be maintained. However, there is a problem that a position shift in the axial direction of the laminated fixed core between adjacent divided laminated cores occurs, and a special jig and process are separately required to prevent this.

  The present invention has been made to solve the above-described problems, and is resistant to the effects of residual compressive thermal stress even when welded. In addition to preventing radial misalignment of the laminated fixed iron core, the axial position It aims at providing the lamination | stacking fixed iron core which can suppress deviation | shift.

  The laminated fixed iron core according to the present invention constitutes a divided laminated iron core by stacking a plurality of iron core pieces each having a yoke part and a tooth part having a convex part and a concave part by fitting the convex part and the concave part, In a laminated fixed iron core formed by connecting a plurality of these in a ring shape, at least one of the plurality of iron core pieces constituting each divided laminated iron core has a convex portion of a yoke part of an adjacent iron core piece of the divided laminated iron core. Is fitted with the recess.

  Further, the laminated fixed iron core according to the present invention is a laminated laminated iron core formed by laminating a plurality of iron core pieces each having a yoke part and a tooth part to form a divided laminated iron core. At least two adjacent divided laminated cores are formed by fitting and laminating convex portions and concave portions provided on yoke portions of a plurality of core pieces, and the convex portions of at least one of the core pieces are convex. The portions are joined by fitting with the concave portions of the yoke portions of the core pieces of the divided laminated iron cores adjacent to each other.

  Further, the laminated fixed iron core according to the present invention is a laminated laminated iron core formed by laminating a plurality of iron core pieces each having a yoke part and a tooth part to form a divided laminated iron core. At least two adjacent divided laminated cores are formed by fitting and laminating convex portions and concave portions provided on yoke portions of a plurality of core pieces, and the convex portions of at least one of the core pieces are convex. The part is fitted to the concave part of the yoke part of the core part of the adjacent split laminated core, and the connecting part of the split laminated core, except for the connecting part of at least two adjacent split cores, is rotatable It is connected to.

The laminated fixed iron core according to the present invention constitutes a divided laminated iron core by stacking a plurality of iron core pieces each having a yoke part and a tooth part having a convex part and a concave part by fitting the convex part and the concave part, In a laminated fixed iron core formed by connecting a plurality of these in a ring shape, at least one of the plurality of iron core pieces constituting each divided laminated iron core has a convex portion of a yoke part of an adjacent iron core piece of the divided laminated iron core. Since each of the laminated laminated cores is not displaced in the radial direction of the laminated fixed iron core during assembly. In addition, since the yoke portions of two adjacent divided laminated cores overlap each other, there is an effect that no positional deviation occurs between the divided laminated cores in the axial direction of the laminated fixed core.
Further, it is possible to provide a laminated fixed core in which the positional deviation in the radial direction and the axial direction of the laminated fixed core is suppressed regardless of the welding position of the joint portion of the divided laminated core.
Furthermore, since it is possible to prevent the occurrence of misaligned defective products, the yield of products can be improved, and a product that is smoothly rotated and has high energy efficiency can be provided.

Further, the laminated fixed iron core according to the present invention is a laminated laminated iron core formed by laminating a plurality of iron core pieces each having a yoke part and a tooth part to form a divided laminated iron core. At least two adjacent divided laminated cores are formed by fitting and laminating convex portions and concave portions provided on yoke portions of a plurality of core pieces, and the convex portions of at least one of the core pieces are convex. Since the parts are connected by fitting with the concave part of the yoke part of the core part of the adjacent split laminated core, there is an effect that no misalignment occurs in the axial direction of the laminated fixed core between the split laminated cores. Play.
Further, it is possible to provide a laminated fixed core in which the positional deviation in the radial direction and the axial direction of the laminated fixed core is suppressed regardless of the welding position of the coupling portion.
Moreover, there exists an effect that the freedom degree of design of joint part (connection part) shape other than the joint part which welds can be ensured.
Furthermore, since it is possible to prevent the occurrence of misaligned defective products, the yield of products can be improved, and a product that is smoothly rotated and has high energy efficiency can be provided.

Further, the laminated fixed iron core according to the present invention is a laminated laminated iron core formed by laminating a plurality of iron core pieces each having a yoke part and a tooth part to form a divided laminated iron core. At least two adjacent divided laminated cores are formed by fitting and laminating convex portions and concave portions provided on yoke portions of a plurality of core pieces, and the convex portions of at least one of the core pieces are convex. The joint portion of the split laminated iron core is fitted to the concave portion of the yoke portion of the adjacent split laminated core, and the connecting portion excluding the joint portion of at least two adjacent split laminated cores is a rotating shaft. As a result, there is an effect that no positional deviation occurs between the split laminated cores even in the axial direction of the laminated fixed cores.
Further, it is possible to provide a laminated fixed core in which the positional deviation in the radial direction and the axial direction of the laminated fixed core is suppressed regardless of the welding position of the coupling portion.
Moreover, there exists an effect that the freedom degree of design of joint part (connection part) shape other than the joint part which welds can be ensured.
Moreover, since it can manufacture by connecting except a coupling | bond part, a lamination | stacking fixed iron core with high winding efficiency can be provided.
Furthermore, since it is possible to prevent the occurrence of misaligned defective products, the yield of products can be improved, and a product that is smoothly rotated and has high energy efficiency can be provided.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a laminated fixed iron core 1 according to Embodiment 1 of the present invention. The laminated fixed iron core 1 is configured by joining a plurality of divided laminated iron cores 2 shown in FIG. In the laminated fixed iron core 1 shown in this embodiment, twelve divided laminated iron cores 2 are coupled.
Each divided laminated core 2 is formed by laminating two types of iron core pieces. These two types of iron core pieces are referred to as iron core piece 3 and iron core piece 4. 3 is a plan view of the core piece 3, FIG. 4 is a perspective view of the core piece 3, FIG. 5 is a plan view of the core piece 4, FIG. 6 is a perspective view of the core piece 4, and FIG. It is a top view of the principal part.

The invention according to Embodiment 1 will be described with reference to these drawings.
3 and 4 includes a tooth portion 3a and a yoke portion 3b. Similarly, the iron core piece 4 illustrated in FIGS. 5 and 6 includes a tooth portion 4a and a yoke portion 4b. Both ends in the circumferential direction of the iron core pieces 3 and 4 are formed linearly.
In the divided laminated iron core 2 shown in FIG. 2, the three pieces from the bottom are the iron core pieces 4, and the three pieces superposed thereon are the iron core pieces 3. Further, three iron core pieces 4 and 3 are alternately stacked.
The first character in the reference numerals indicating the respective parts of the iron core piece 3 and the iron core piece 4 to be described below represents the left and right (first letter of Left and Right), and the second letter represents the first letter of the unevenness (Recess and Progression). ).
Recesses 3LR and 3RR extending in the circumferential direction of the laminated fixed iron core are provided at both ends of the upper surface of the yoke portion 3b of the iron core piece 3 shown in FIGS. Further, convex portions 3LP and 3RP that are paired with the concave portions 3LR and 3RR on the upper surface are provided at both lower ends of the yoke portion 3b of the iron core piece 3, respectively. When the two iron core pieces 3 are stacked one above the other, the paired concave and convex portions are fitted to each other.
Similarly, concave portions 4LR and 4RR extending in the circumferential direction of the laminated fixed core are provided at both ends of the upper surface of the yoke portion 4b of the core piece 4 shown in FIGS. Further, convex portions 4LP and 4RP which are paired with the concave portions 4LR and 4RR on the upper surface are provided at both lower surfaces of the yoke portion 4b of the iron core piece 4, respectively. When the two iron core pieces 4 are stacked one above the other, the paired concave and convex portions are fitted to each other.
In the split laminated core 2 shown in FIG. 2, the bottom core piece 4 having a through hole (there is no convex portion 4LP and concave portion 4LR) is used, but the same core piece 4 may be used.

  The shapes of the iron core piece 3 and the iron core piece 4 are different in the yoke portion. When the iron core piece 3 and the iron core piece 4 are overlapped with the teeth portions 3a and 4a aligned, the overlapping portions 3c are not overlapped with each other (the right side portion from the dotted line in FIG. 3 and the left side portion from the dotted line in FIG. 5). 4c. When the core pieces 3 and 4 are aligned with each other and a predetermined number of teeth portions 3a and 4a are laminated to produce the divided laminated iron core 2, and the divided laminated iron core 2 is combined to produce the laminated fixed iron core 1, the overlap portion 3c. 4c becomes the overlap portions 5U, 5D, 6U, and 6D shown in FIG. In the hatched portion shown in FIG. 7, each overlap portion of the divided laminated core 2 overlaps with each overlap portion of the adjacent divided laminated cores 2R, 2L.

The details of the fitting between the adjacent divided laminated cores through the overlap portion will be described. For convenience of explanation, the iron core piece 44 at the top of the overlap portion 5U shown in FIG. FIG. 8 is a perspective view of the iron core piece 44.
Further, although not shown in FIG. 2, the split core core coupled to the left side of the split core core 2, that is, the third core piece 3 from above the split core core 2L shown in FIG. . FIG. 9 is a perspective view of the iron core piece 2L33.
Since the iron core piece 44 and the iron core piece 2L33 are each one of the iron core piece 3 and the iron core piece 4, the shape and structure of the concave portion and the convex portion provided on the surface thereof are the concave portion and the convex portion of the iron core pieces 3 and 4 described above. The shape and structure are the same.
The three iron core pieces 3 are stacked with the teeth portions aligned on the iron core piece 44, but when the iron core piece 44 shown in FIG. 8 is viewed from directly above, the dotted line of the recess 44LR on the upper surface of the left end portion A convex portion 3LP provided on the lower surface of the left end portion of the iron core piece 3 that is directly above is fitted in a portion (a portion other than the overlap portion) that exists on the right side from FIG. 2 (FIG. 2). And in the part which exists in the left side from a dotted line of the recessed part 44LR, this iron core piece 44 overlaps with an overlap part. The existing part (FIG. 9, part existing in the overlap part) fits. A portion (not shown, a portion other than the overlap portion) existing on the left side of the dotted line of the convex portion 2L33RP is directly below the iron core piece 2L33, and the right end of the fourth iron core piece 4 from above the divided laminated iron core 2L. It fits into a recess 4RR provided on the top surface of the part.

As described above, the convex portion 2L33RP of the iron core piece 2L33 is fitted across the concave portion 44LR of the iron core piece 44 constituting the divided laminated core 2 and the concave portion 4RR of the fourth iron core piece 4 from above the divided laminated iron core 2L. Will be doing. In addition, the concave and convex portions mesh with each other in the circumferential direction and the radial direction of the laminated fixed iron core 1 without any gap.
In the actual manufacturing process, first, a necessary number of divided laminated cores 2 are manufactured in pieces, wound in a predetermined position, and then the divided laminated cores 2 are arranged concentrically in the axial direction toward the center. By pressing, the entire overlap portion is fitted at the same time.
And finally, the joint part of the outer periphery of the split laminated iron cores 2 is welded. It can be welded at a place where the adjacent divided laminated cores 2 are in contact with each other in the vertical direction or at a place where they are in contact with the horizontal direction. It does n’t matter where you are. When welding is performed, residual compressive thermal stress acts in the process of cooling the welding point. This force is a force from the circumferential direction (left and right) toward the welding point as shown in FIG. 10 when the adjacent divided laminated iron cores 2 are welded in the vertical direction. As shown in FIG. 11, the welding point is a force for pulling the welding point from the vertical direction to the inside of the laminated fixed core 1. For residual compressive thermal stress acting from the circumferential direction (left and right) toward the welding point, the convex portion 2L33RP described in the previous paragraph and the convex portions of all the iron core pieces 3 stacked above and below the welding point. The 3RPs face each other as a beam in the recessed portions to be fitted.
Further, the residual compressive thermal stress from the vertical direction toward the welding point is distributed not only to the welded core piece but also to all the core pieces above and below the weld point via the concavo-convex portions to be fitted.
Therefore, local deformation does not occur in the laminated fixed iron core 1.

Thus, the laminated core 1 according to the first embodiment has an uneven portion that fits in the up and down direction across the divided laminated cores 2 adjacent in the circumferential direction. There is no positional displacement in the radial direction of the laminated fixed iron core 1. Further, since the overlap portions are alternately meshed with each other, there is a feature that positional deviation does not occur between the adjacent divided laminated cores 2 even in the axial direction of the laminated fixed iron core 1.
In addition, according to this embodiment, it is possible to provide the laminated fixed core 1 in which the positional deviation in the radial direction and the axial direction of the laminated fixed core 1 is suppressed regardless of the welding position.
Furthermore, since it is possible to prevent the occurrence of misaligned defective products, the yield of products can be improved, and a product that is smoothly rotated and has high energy efficiency can be provided.
In this embodiment, the structure in which the iron core pieces 3 and 4 are overlapped three by three to form the overlap portion has been described. However, the same effect can be obtained by alternately stacking the iron core pieces 3 and 4 or changing the number of overlapping pieces. can get.
Moreover, even if the concave portion and the convex portion are reversed, the same effect can be obtained.

Embodiment 2. FIG.
FIG. 12 is a perspective view of the laminated fixed iron core according to the second embodiment, and FIG. 13 is a plan view of the main part of the laminated fixed iron core. In this embodiment, the shape of both ends in the circumferential direction of the core pieces 3 and 4 constituting the split laminated core 2 of the laminated fixed iron core is not a straight line, but a shape combining straight lines and curves. Thus, both ends of each iron core piece do not necessarily have to be a straight line, as long as it has a shape that can form the fitting relationship of the concavo-convex part described in the first embodiment, between the iron cores that are adjacent vertically and horizontally, As in the first embodiment, the effect of suppressing the positional deviation in the radial direction and the axial direction of the laminated fixed iron core can be achieved.

Embodiment 3 FIG.
FIG. 14 shows a laminated fixed iron core 101 according to the third embodiment.
As in the first embodiment, the laminated fixed iron core 101 has two split laminated iron cores having a connecting portion shape that engages the overlap portion at one end and a connecting portion that is a connecting portion shape that can be rotated at the other end. These are composed of 10 divided laminated cores having the same connecting portions at both ends as the connecting portions of the two divided laminated cores described above.
As shown in FIG. 14, a laminated fixed iron core 101 is configured by fitting a connecting portion 10 at one end of a divided laminated iron core group in which all divided laminated iron cores are connected to a connecting portion at the other end.
The difference from the first embodiment is the shape of the concavo-convex portion provided in the iron core piece. In the first embodiment, the concave and convex portions on the iron core pieces 3 and 4 are linearly provided in the circumferential direction of the laminated fixed iron core for the convenience of assembly.
In this embodiment, all the divided laminated cores are connected, and finally, both ends are fitted together. Therefore, if the circumferential edge of the uneven portion to which the divided laminated iron cores 102 and 102L are fitted has a planar structure, the coupling portion cannot be fitted without a gap. Therefore, as shown in FIG. 14, the outer circumferential surface of the concave and convex portions of the divided laminated cores 102, 102 </ b> L and the inner circumference in a shape along an arc centered on the connecting portion 11 in the middle of the connected divided laminated core groups. The surface must be molded. Thereby, an uneven | corrugated | grooved part can be fitted together without a clearance gap.

  Next, the structure of the connecting portion 11 will be briefly described. A split laminated iron core 102 having a coupling portion 10 and a connecting portion 11 is shown in FIGS. A circular concave portion 103RR is provided at a predetermined position on the upper surface of the right end portion of the core piece 103 of the divided laminated core 102, and a circular convex portion 103RP is provided directly below the lower surface of the core piece 103 and 103RR, which is not visible in the drawing. Although not shown, a circular concavo-convex portion that meshes with the concavo-convex portion is provided in the connection portion of the split laminated core 102R that is connected adjacent to the right in FIG. The connecting portion can be rotated about a line connecting the center points of the concavo-convex portions as a rotation axis.

For convenience of explanation, FIGS. 15 and 16 show the assembled assembled laminated core 102, but the actual assembly process of the laminated fixed core 101 is different.
The core pieces that are the lowermost layers of all the divided laminated cores are arranged in a horizontal row, and then the second layer is overlaid. Separately laminated cores are manufactured by sequentially stacking phases and caulking at the end and connected in a belt shape. This is because the connecting portion 11 cannot be configured unless manufactured in this manner.
And the division | segmentation laminated | stacked iron core group is extended straightly in the connection part 11, Then, it winds around each teeth part. When winding is complete, fit the joints at both ends together. It is completed by welding the appropriate place of the joint.
As in the first embodiment, the position of the welded portion does not matter.
Thereby, the same effect as Embodiment 1 is acquired.
Moreover, the freedom degree of design of the shape of connection parts other than the connection part which welds can be ensured.
Furthermore, since it can manufacture by connecting parts other than a coupling part, the lamination | stacking fixed iron core 101 with high winding efficiency can be provided.

1 is a perspective view of a laminated fixed iron core 1 according to a first embodiment. 2 is a perspective view of a split laminated iron core 2 according to Embodiment 1. FIG. 3 is a plan view of an iron core piece 3 according to Embodiment 1. FIG. 3 is a perspective view of an iron core piece 3 according to Embodiment 1. FIG. 3 is a plan view of an iron core piece 4 according to Embodiment 1. FIG. 2 is a perspective view of an iron core piece 4 according to Embodiment 1. FIG. 3 is a plan view of a main part of the laminated fixed iron core 1 according to Embodiment 1. FIG. 3 is a perspective view of an iron core piece 44 according to Embodiment 1. FIG. It is a perspective view of iron core piece 2L33 of Embodiment 1. It is a figure which shows the direction of the residual compressive thermal stress at the time of welding in the part which contact | connects between the adjacent division | stacking laminated iron cores in Embodiment 1 vertically. It is a figure which shows the direction of the residual compressive thermal stress at the time of welding in the part which touches horizontally between the adjacent division | segmentation laminated iron cores in Embodiment 1. FIG. 6 is a perspective view of a laminated fixed iron core according to a second embodiment. FIG. FIG. 6 is a plan view of a main part of a laminated fixed iron core according to a second embodiment. It is a figure which shows the coupling | bonding method of the lamination | stacking fixed iron core of Embodiment 3. FIG. FIG. 10 is a perspective view of a split laminated iron core having a coupling portion according to a third embodiment. FIG. 10 is a perspective view of a split laminated iron core having a coupling portion according to a third embodiment.

Explanation of symbols

1,101 laminated fixed iron core,
2,2L, 2R, 102,102L, 102R split laminated iron core,
3, 4, 44, 2L33 Iron core piece, 3a, 4a teeth part, 3b, 4b yoke part,
3c, 4c overlap part,
3LP, 3RP, 4LP, 4RP, 44RP, 2L33RP Convex part,
3LR, 3RR, 4LR, 4RR, 44RR recess,
5U, 5D, 6U, 6D Overlap section, 10 coupling section, 11 coupling section.

Claims (5)

A plurality of iron core pieces each having a yoke part and a tooth part having a convex part and a concave part are laminated by fitting the convex part and the concave part to form a split laminated iron core, The laminated fixed iron core is characterized in that at least one of the plurality of core pieces constituting each of the divided laminated cores is fitted with a concave portion of a yoke portion of an adjacent core piece of the divided laminated core. Laminated fixed iron core. In a laminated fixed core formed by laminating a plurality of iron core pieces each having a yoke portion and a teeth portion to form a divided laminated iron core, and connecting them in a ring shape, at least two adjacent divided laminated iron cores are: The yoke portion of the core piece of the divided laminated core, which is configured by fitting and laminating projections and recesses provided on the yoke portions of the plurality of core pieces, and at least one of the plurality of core pieces adjacent to each other. A laminated fixed iron core characterized by being coupled by being fitted to a concave portion. In a laminated fixed core formed by laminating a plurality of iron core pieces each having a yoke portion and a teeth portion to form a divided laminated iron core, and connecting them in a ring shape, at least two adjacent divided laminated iron cores are: The yoke portion of the core piece of the divided laminated core, which is configured by fitting and laminating projections and recesses provided on the yoke portions of the plurality of core pieces, and at least one of the plurality of core pieces adjacent to each other. And a coupling portion of the divided laminated iron cores, wherein the coupling portions excluding the coupling portions of the at least two adjacent divided laminated cores are rotatably connected to each other. Iron core. The laminated fixed iron core according to claim 3, wherein a side surface of the fitting surface of the convex portion and the concave portion has an arc shape, and a center of curvature of the arc coincides with any one of the rotation axes. The laminated fixed core according to any one of claims 1 to 4, wherein a line in contact with an adjacent divided laminated core is uneven in an axial direction of an outer peripheral surface of the laminated fixed core.

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