JP5094257B2 - Rotating electrical iron core - Google Patents

Description

  The present invention relates to an iron core of a rotating electrical machine in which a plurality of core pieces divided in the circumferential direction are rotatably connected and can be formed in an annular shape or an arc shape by rotating a connecting portion.

  As an iron core of a conventional rotating electrical machine, the ends of a plurality of core pieces are connected to each other to form an annular shape, and the core pieces are formed by projecting magnetic teeth in a direction substantially perpendicular to the connecting direction. A connecting portion is formed on one end side of the first portion, the first end surface on the one end side is formed in an arc shape centering on the connecting portion, and the first end surface is adjacent to the other end side. A second end face that can be fitted to the end face is formed, and the first core member is formed by arranging the core pieces in a band shape via the both end faces, and the core piece is the first core member. The second core members that are alternately arranged in a strip shape in the connecting direction are stacked so that adjacent ends overlap each other in the stacking direction of the core pieces, and the connecting portions are connected rotatably. The core formed in the ring shape with the magnetic pole teeth inside The first and second end faces of the core pieces are each formed with a notch at each corner on the outer side of the core, and the portions where the notches are formed and the portions of the core pieces corresponding to the stacking direction There is a core characterized by being cut out with the same projected cross-sectional shape as the above cutout (see, for example, Patent Document 1).

Japanese Patent No. 3749444 (page 4, lines 43 to 45, page 5, lines 24 to 27, page 6, lines 5 to 9, lines 5, 6, 7, and 8)

  In the iron core of the conventional rotating electrical machine configured as described above, a circular locus is drawn on the core piece adjacent to the core piece to be wound by forming a notch in each corner on the outside of the core piece. It is configured to be able to rotate to a position where it does not interfere with the rotating winding head, but since a notch is formed on the outer peripheral surface in order to ensure the necessary rotation angle, There is a problem that the magnetic path area of the core piece is reduced, the flow of magnetic flux is hindered, and the efficiency of the rotating electrical machine is hindered.

  The present invention has been made in order to solve the above-described problems of the prior art, and improves the efficiency of the rotating electrical machine by eliminating the notch and expanding the magnetic path. To obtain an iron core of a rotating electrical machine that can rotate a core piece adjacent to a core piece to be wound to a position where it does not interfere with a rotating winding head by drawing a circular locus when winding a tooth. It is aimed.

The iron core of the rotating electrical machine according to the present invention is formed by laminating a core piece in which the outer peripheral portion constituting the yoke portion is divided into a plurality of portions in the circumferential direction and the magnetic pole teeth are protruded radially inward from the outer peripheral portion. A plurality of laminated bodies each configured to be rotatable around a pivot provided in the laminating direction in the vicinity of the circumferential end of the outer peripheral portion, and rotated around the pivot during winding. In an iron core of a rotating electrical machine that can be opened outward by being made to be substantially annular or arcuate , the end of the core piece that constitutes one of the laminate is connected to the end of the laminate that is connected to each other. It is laminated alternately with the end portion of the core piece constituting the other of the laminate, and the pivot is formed on the convex portion formed on the surface of the core piece and on the back side of the convex portion. , The convex part of the core piece adjacent in the stacking direction Only put it from the recess to engage rotatably with, the projections and recesses has been made to interconnecting the ends of the core pieces are laminated, the axis of the pivot is the該枢shaft The trajectory of the arc that forms the outer peripheral surface is provided at a position that protrudes outside the outer peripheral surface of the core piece that constitutes the outer peripheral portion of the yoke portion, and the central angle of the arc that is in contact with the core piece is 180 degrees. It is larger and less than 360 degrees .

According to this invention, the axis of the pivot that is provided in the stacking direction in the vicinity of the end of the stacked body in which the core pieces are stacked and rotatably connects the end of the stacked body, and the arc that forms the outer peripheral surface of the pivot The circular locus can be drawn without forming a notch on the outer peripheral surface of the core piece by providing the trajectory of the outer peripheral surface of the core piece that protrudes outside the outer peripheral surface of the core piece. Since the other core piece adjacent to the core piece to be wound can be rotated to a position where it does not interfere with the rotating winding head, the winding workability is the same as before, but there is no notch on the outer periphery. In addition, the magnetic path of the magnetic flux flowing in the iron core can be widened, the efficiency of the rotating electrical machine can be improved, and the ends of the core pieces formed on the core pieces and forming the pivot and the concave portions are connected to each other. by also perform the function, it is possible to simplify the structure Remarkable effect unprecedented that can be obtained.

Embodiment 1 FIG.
1 to 4 illustrate an iron core of a rotating electrical machine according to Embodiment 1 of the present invention. FIG. 1 is a perspective view, and FIG. 2 is an enlarged perspective view of a main part showing the connecting portion shown in FIG. FIG. 3 is an enlarged plan view of a main part showing the connecting part shown in FIG. 1, and FIG. 4 is a plan view of the main part when an adjacent core member is opened around a pivot. In the drawings, the same reference numerals denote the same or corresponding parts. In the figure, the annular core 1 is a laminated body 11, 12 of a predetermined number of core pieces 2 formed by being divided into a plurality (eight in this example) in the circumferential direction on the outer peripheral part 1 a constituting the yoke part. 13... The laminated bodies 11 and 12, the laminated bodies 12 and 13,..., The laminated bodies 17 and 18 that are adjacent to each other in the circumferential direction are rotatably connected around the pivot 3 provided in each adjacent portion. It is comprised so that it can open to an outer side by the contact part A shown by.

  Each core piece 2 has a substantially T-shape having an outer peripheral portion 1a constituting a yoke portion in which an arc-shaped outer peripheral surface 1b is formed, and a magnetic pole tooth 4 protruding radially inward from the outer peripheral portion 1a. The core pieces 2 made of a plate-like magnetic material formed in the shape of the laminated bodies 12 to 17 constitute the pivot 3 for connecting the adjacent core pieces 2 to each other and allowing them to rotate. Concavities and convexities 31 (FIG. 2) are provided on the first core piece 21 provided on the outer peripheral portion on one end side (when viewed from the top in FIG. 1) and on the other end side (same And the second core piece 22 provided on the outer peripheral portion on the clockwise end portion side). The flat portions of the first and second core pieces 21 and 22 are formed of irregularities for positioning in the plane direction during stacking and engaging with each other in the stacking direction (the back surface is concave when the surface is convex). The engaging projections 5 are provided at three predetermined locations. The core pieces 2 constituting the laminates 11 and 18 are formed in curved shapes that can be in close contact with each other when the end portions on the contact portion A side are in contact with each other. Since it is substantially the same, detailed explanation is omitted.

  One end surface 21a in the circumferential direction of the first core piece 21 is formed so as to protrude in a substantially arcuate shape, and the other end surface 21b in the circumferential direction is formed in a shape recessed in substantially the same arcuate shape. Similarly, one end surface 22a in the circumferential direction of the second core piece 22 is formed in an arcuate shape as shown by a broken line for explanation in FIG. 2, and the other end surface 22b in the circumferential direction is substantially the same bow. The first core piece 21 and the second core piece 22 are formed symmetrically with respect to the shape. And the 1st core piece 21 and the 2nd core piece 22 are alternately arrange | positioned in the lamination direction, and the 1st core piece 21 with respect to the 1st core piece 21 in the circumferential direction is 1st. The second core piece 22 is disposed so as to be adjacent to the second core piece 22.

In the first embodiment, the pivot 3 which is a characteristic part of the present invention is composed of irregularities 31 respectively formed on the first and second core pieces 21 and 22, and the irregularities 31 are convexities formed on the surface side. It is composed of a portion 31a and a concave portion 31b formed on the back side of the convex portion 31a and capable of receiving the convex portion 31a of the core piece adjacent in the stacking direction and engaging with the pivotable portion 31a. However, the locus of the arc 3a forming the outer peripheral surface of the pivot 3 is provided at a position where it protrudes outside the outer peripheral surface 1b of the first and second core pieces 21 and 22. That is, the unevenness 31 constituting the pivot 3 has a center angle θ of the arc portion as shown in FIG.
180 ° <θ <360 °
The plane or the cross-sectional shape is formed in a generally D shape. The pivot axis of the first core piece 21 at the top in the stacking direction is shown in FIG. 2 for practical reasons that the dimension in the stacking direction increases when the protrusion 31a protrudes, which impedes the bobbin mounting. Thus, the case where it changes to the unevenness | corrugation 31, and it is set as the hole which consists of an arc-shaped notch is illustrated.

  Next, the operation of the first embodiment configured as described above will be described. First, in order to laminate the first and second core pieces 21, 22, the first core piece 21 and the second core piece 22 are connected to each other by the uneven portions 31. For example, in the case where the upper and lower layers are sequentially stacked at the connecting portion in FIG. 2, the second core piece 22 is on the lower side, the first core piece 21 is on the upper side, and the convex portion 31 a of the second core piece 22. Are engaged and connected so as to fit into the recess 31b of the first core piece 21. Next, another first core piece 21 is placed on the upper surface of the second core piece 22, and the engagement protrusions 5 are aligned with each other to be positioned and pressed together to engage in the stacking direction. Similarly, the first and second core pieces 21 and 22 are sequentially connected and laminated in the circumferential direction and the laminating direction, and the laminated bodies 11 and 18 (FIG. 1) positioned at both end portions are the end portions of the core pieces. By using a core piece (not shown) that does not have an uneven portion 31, the laminated bodies 11 to 18 are connected in a band shape, and the iron core 1 that can be bent into an annular shape shown in FIG. 1 is obtained.

  In the iron core 1 configured as described above, the axis O of the pivot 3 has a locus of the arc 3a forming the outer circumferential surface of the pivot 3, and the outer circumference 1b of the first and second core pieces 21 and 22 is outside. Since the center angle θ of the arc portion of the pivot 3 is formed in a substantially D-shape that satisfies 180 ° <θ <360 °, the adjacent laminated body is rotated around the pivot 3. Even if it is rotated until it exceeds the position indicated by a two-dot chain line B in FIG. 4 that is an extension of the bottom surface 2a of the outer peripheral portion 1a orthogonal to the magnetic pole teeth 4, The corner C does not interfere with the outer peripheral surface 1b of the laminate 13. Therefore, when a winding head (not shown) that rotates with a circular locus is sequentially wound around the magnetic pole teeth 4 of each laminated body, the circular locus is drawn around the magnetic pole teeth 4 and rotated. Winding can be easily performed without interference between the laminated body 12 adjacent to the winding head and the laminated body 14 (not shown). The pivot 3 is provided at a position protruding from the outer peripheral surface 1b of the iron core 1, but the central angle θ of the arc in contact with the adjacent core piece is formed in a substantially D-shape satisfying 180 ° <θ <360 °. Therefore, the adjacent laminated body does not come off in the radial direction of the iron core.

  As described above, according to the first embodiment, the trajectory of the arc 3a that forms the outer peripheral surface of the pivot 3 is the axis O of the pivot 3, and the locus of the outer peripheral surface 1b of the first and second core pieces 21 and 22 is the same. By providing it at a position that protrudes to the outside, even if the outer peripheral surface 1b portion of the first and second core pieces 21 and 22 is not provided with a notch, the two-dot chain line B in FIG. 4 is an extension of the bottom surface 2a. The adjacent laminated body can be rotated until the position shown is exceeded. For this reason, the magnetic path of the magnetic flux which flows in the iron core 1 can be widened, and the remarkable effect which does not exist conventionally that it leads to the improvement of rotary electric machine efficiency is acquired. Furthermore, according to such a configuration, assembly is easy, and the center angle θ of the arc portion of the pivot 3 constituting the connecting means is formed so as to satisfy 180 ° <θ <360 °. Further, it is possible to obtain an effect that the connecting portion is hardly detached and the core pieces are not easily separated. Further, since the pivot 3 is constituted by the irregularities 31 provided on the first and second core pieces 21 and 22, the connecting means can be constituted without using parts other than the core piece 2.

Embodiment 2. FIG.
5 and 6 illustrate the iron core of the rotating electrical machine according to the second embodiment of the present invention. FIG. 5 is an enlarged perspective view of the main portion of the connecting portion, and FIG. 6 is the connecting portion shown in FIG. It is a principal part top view which shows. The iron core 1A according to the second embodiment uses a rod-shaped member having a substantially D-shaped cross section penetrating in the stacking direction of the core pieces 2A as the pivot 3A, and the planar shape of the irregularities 31 of the first embodiment as the core piece 2A. The first core piece 21A and the second core are the same as those in the first embodiment except that a hole 32 made of an arc-shaped notch having a substantially D shape is provided at the same position as in the first embodiment. The piece 22A is used. The central angle θ1 of the hole 32 and the central angle θ2 of the arc portion of the rod-shaped pivot 3A are as follows:
180 ° <θ1 <360 °,
180 ° <θ2 <360 °,
It is formed to satisfy. In the illustrated example, the cross-sectional shape of the pivot 3A and the planar shape of the hole 32 are substantially the same, and are formed as θ1 = θ2. Further, both ends of the pivot 3A are caulked after being stacked in order to prevent falling off. Other configurations and assembly methods are the same as those in the first embodiment, and thus the description thereof is omitted.

According to the second embodiment configured as described above, the connecting portion is rotated via the rod-shaped pivot shaft 3A to form the iron core 1A in an annular shape. Therefore, the rotation becomes even smoother and easier. The effect that accuracy can be improved is obtained. Further, although the rod-shaped pivot 3A is required, it is not necessary to form the unevenness 31 as in the first embodiment on the surface of the core piece 2A, so that the processing of the core piece 2A is facilitated and the first core Since the reverse of the piece 21A has the same shape as the second core piece 22A, the effect that the types of the core pieces 2A constituting the iron core 1A can be reduced is also obtained. In addition, it goes without saying that the same effects as those of the first embodiment can be obtained, such as the fact that the magnetic path of the magnetic flux flowing in the iron core 1A can be widened and the connecting portion is difficult to come off.
Although the rod-shaped pivot 3A has a D-shaped cross section, if the outer peripheral surface of the obtained iron core 1A can be uneven, the cross-sectional shape of the pivot 3A is a general circle, and You may make it a part protrude from the outer peripheral surface of 1 A of iron cores. In this case, it is not necessary to process the pivot 3A into a D shape, so that the manufacturing cost can be reduced.

Embodiment 3 FIG.
FIG. 7 is a perspective view showing an iron core of a rotating electrical machine according to Embodiment 3 of the present invention. In the third embodiment, a predetermined number of core pieces 2 (2A) having the same magnetic pole teeth 4 as in the first and second embodiments are circumferentially connected via the pivot 3 (3A) similar to the first and second embodiments. Are connected as three arc-shaped iron cores 1B. In addition, the end surfaces 1c and 1d in the circumferential direction of the iron core 1B are curved surfaces that can be brought into close contact with each other when brought into contact with each other, and can be configured in an annular shape by connecting a plurality of similar iron cores 1B in the circumferential direction. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
According to the third embodiment configured as described above, the same effect as in the first embodiment can be obtained, and the iron core 1B is formed in an arc shape, so that it is compared with the iron core originally formed in a ring shape. It is compact and lightweight, and the effects of good workability such as handling are obtained.

  In the description of the above embodiment, the first core piece 21 (or 21A) having the pivot 3 (or the hole 32 for the pivot 3A) on one end side of the outer peripheral portion 1a as the core piece 2 (or 2A) An example is shown in which the second core piece 22 (or 22A) having the pivot 3 (or the hole 32 for the pivot 3A) is provided on the other end side of the outer peripheral portion, but is not necessarily limited thereto. is not. For example, a core piece having pivots (or pivot holes) at both ends of the outer peripheral part, and a core piece having a short length without pivots (or pivot holes) on either side of both ends ( (Both are not shown) may be combined. Further, although the core pieces are alternately laminated one by one, it may be laminated every plural pieces. In addition, for example, the number of the magnetic teeth 4, the shape and position / number of the engagement protrusions 5, the end surface shape of the core piece in the circumferential direction, the end surface shape of the contact portion A, and the like are all appropriately changed within the scope of the present invention. It goes without saying that it is what you get.

The perspective view which shows the iron core of the rotary electric machine which concerns on Embodiment 1 of this invention. The principal part perspective view which expands and shows the connection part shown by FIG. The principal part top view which expands and shows the connection part shown by FIG. The principal part top view when rotating the adjacent core member around a pivot and opening. The principal part perspective view which expands and shows the connection part of the iron core of the rotary electric machine by Embodiment 2 of this invention. The principal part top view which shows the connection part shown by FIG. The perspective view which shows the iron core of the rotary electric machine which concerns on Embodiment 3 of this invention.

Explanation of symbols

  1, 1A, 1B Iron core, 1a outer peripheral part, 1b outer peripheral surface, 11, 12, 13,..., 18 laminate, 2 core pieces, 2a bottom face, 21, 21A first core piece, 21a one end face, 21b The other end surface, 22, 22A second core piece, 22a one end surface, 22b the other end surface, 3, 3A pivot, 3a arc, 31 unevenness, 31a protrusion, 31b recess, 32 hole, 4 magnetic teeth, 5 engaging protrusion, A contact part, C corner part, O axis center, θ center angle.

Claims (3)

A plurality of laminates each formed by laminating core pieces formed by dividing the outer circumferential portion of the yoke portion into a plurality of portions in the circumferential direction and projecting magnetic pole teeth radially inward from the outer circumferential portion, The outer peripheral portion of the outer peripheral portion is pivotally connected around a pivot provided in the stacking direction in the vicinity of the circumferential direction, and can be opened outward by rotating around the pivot during winding. In an iron core of a rotating electrical machine that can be formed in an annular shape or an arc shape, an end of the core piece that constitutes one of the laminated bodies at an end of the laminated bodies that are connected to each other forms the core that constitutes the other of the laminated bodies The pivots are alternately stacked with the ends of the pieces, and the pivot is formed on the surface of the core piece and on the back side of the protrusion, and is adjacent to the stacking direction of the core piece. Recesses that can be received and pivotally engaged From it, the projections and recesses has been made to interconnecting the ends of the core pieces are laminated, the axis of the pivot, the arc path is the yoke that forms the outer peripheral surface of該枢shaft constituting the outer peripheral portion of the parts is provided at a position protruding outside the outer peripheral surface of the core piece, and wherein the central angle of the circular arc in contact with the core piece is larger than 180 degrees and less than 360 degrees Iron core of rotating electrical machine. 2. The iron core of a rotating electrical machine according to claim 1 , wherein the pivot is formed to have a substantially D-shaped cross-section in which a portion protruding from the outer peripheral surface of the core piece is cut off. The core piece, one end surface in the circumferential direction is protruded arcuate, claim other end surface of the circumferential direction, characterized in that it is formed in a recessed shape substantially the same arcuate 1 or claim 2 The iron core of the rotating electrical machine described in 1.

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