JP2014093878A - Framed armature core sheet, framed armature core, process of manufacturing armature core, and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a framed armature core sheet, a framed armature core, a process of manufacturing the armature core, and a motor, capable of making separation simple and being manufactured at low cost without a need of repositioning.SOLUTION: In an armature core sheet 6 at which, on a same thin plate, an armature core 2 configured of a magnetic pole tooth 4 and a yoke 5 crossing the magnetic pole tooth 4 perpendicularly and a frame body part 3 disposed at a periphery of the armature core 2 are cut and reinserted, the frame body part 3 includes a separation part 20 that may be separated from the frame body part 3 by being cut and reinserted.

Description

  The present invention relates to a framed iron core sheet, a framed iron core, a method of manufacturing an iron core, and an electric motor for manufacturing an iron core of an electric motor formed by laminating thin plates into a predetermined shape.

  As a conventional method for manufacturing an iron core of an electric motor, an iron core portion composed of a magnetic pole tooth and a yoke orthogonal to the magnetic pole tooth is press-formed with a thin plate, and the iron core sheets are laminated and fixed, for example, by caulking, to obtain an iron core. Then, there is a method of obtaining a partially insulated core by attaching a covering such as a tape to the iron core, attaching an insulator, and then removing the covering.

  In contrast to the above method, the outer peripheral edge of the core sheet is covered by press-fitting the core sheet punched out in the press forming step into the frame part remaining by punching the core sheet in a press-fitted state. There exists a manufacturing method using the iron core obtained by laminating | stacking. After applying the insulation without attaching or removing the coating, the frame was deformed to separate the iron core, and then the iron core was pulled out in the thickness direction of the material to partially apply the insulation. An iron core can be obtained (see, for example, Patent Document 1).

JP 2012-34464 A

  The conventional iron core with a frame has a problem that when a core with a large thickness in the stacking direction is pulled out in the thickness direction, a large pulling force is required, so that the separation mechanism becomes large, resulting in an increase in equipment costs. . Moreover, since it is necessary to position the iron core again when winding the coil on the iron core pulled out in this way, there is a problem that the manufacturing cost increases.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The iron core sheet with a frame and the frame with which the separation is simple and can be manufactured at a low cost without the need for re-positioning. An object is to provide an iron core, a method for manufacturing the iron core, and an electric motor.

The framed iron core sheet of this invention is
On the same sheet,
An iron core composed of magnetic teeth and a yoke orthogonal to the magnetic teeth;
In the core sheet with a frame in which the frame body portion disposed on the outer periphery of the iron core portion is cut and fitted back,
The said frame part is provided with the isolation | separation part by which the said frame part can be isolate | separated and cut | disconnected and fitted back.

The framed iron core of the present invention is
A plurality of framed core sheets described above are formed by being laminated.

Moreover, the manufacturing method of the iron core of this invention is
In the above-described framed iron core,
Separating the separation part;
Winding a wire around the magnetic pole teeth;
And a step of separating the iron core portion from the frame body portion.

The electric motor of the present invention is
The iron core part shown above is provided.

The framed iron core sheet of the present invention, the framed iron core, the method of manufacturing the iron core, and the electric motor,
As constructed and manufactured as above,
Separation of the frame body is simplified, and the manufacturing cost can be reduced.

It is a figure which shows the structure of the iron core sheet with a frame of Embodiment 1 of this invention. It is the elements on larger scale which show the detail of the isolation | separation part of the iron core sheet with a frame shown in FIG. It is sectional drawing which shows the manufacturing method of the iron core sheet with a frame shown in FIG. It is sectional drawing which shows the manufacturing method of the iron core sheet with a frame shown in FIG. It is the figure which showed the other structure and iron core with a frame in the iron core sheet with a frame in Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the iron core in the iron core with a frame shown in FIG. It is a figure which shows the manufacturing method of the iron core in the iron core with a frame shown in FIG. It is a figure which shows the manufacturing method of the iron core in the iron core with a frame shown in FIG. It is a figure which shows the manufacturing method of the other iron core in the iron core with a frame shown in FIG. It is a figure which shows the structure of the electric motor using the iron core shown in FIG. It is a figure which shows the structure of the iron core sheet with a frame of Embodiment 2 of this invention.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a diagram showing a configuration of a framed core sheet according to Embodiment 1 of the present invention, FIG. 2 is a partially enlarged view showing details of a separation part of the framed core sheet shown in FIG. 1, and FIGS. Sectional drawing which shows the manufacturing method of the iron core sheet with a frame shown in FIG. 1, FIG. 5 is a figure which shows the structure of the other iron core sheet with a frame in Embodiment 1 of this invention, and the structure of an iron core with a frame, FIG. 8 is a diagram showing a method of manufacturing the core in the framed core shown in FIG. 5, FIG. 9 is a diagram showing another method of manufacturing the core in the framed core shown in FIG. 5, and FIG. 10 is the core shown in FIG. It is a figure which shows the structure of the electric motor using.

  In FIG. 1 (a), the framed core sheet 6 can be fitted back by cutting the core part 2 and the frame part 3 formed on the outer periphery of the core part 2 into the same thin plate (one thin plate). Is formed. The iron core portion 2 includes a magnetic pole tooth 4 and a yoke 5 orthogonal to the magnetic pole tooth 4. Thus, the formation method which can cut | disconnect and refit the iron core part 2 and the frame part 3 can be performed by the method of "pushback", for example, as shown in FIG. Specifically, when the thin plate 14 is punched with a press die (FIG. 3A), the cut portion 14a is completely cut from the thin plate 14 using the punch 13 (FIG. 3B). Thereafter, the cut portion 14a can be fitted back into the thin plate 14 by the spring portion 16 built in the die 15 (FIG. 3C). Since there is a clearance between the punch 13 and the die 15, the cut portion 14 a extends in the surface direction of the thin plate 14. Therefore, the cut portion 14a can be held in the press-fitted state by being fitted back to the thin plate 14.

  As shown in FIG. 2, the frame body portion 3 includes a separation portion 20 that is cut and fitted back and can separate the frame body portion 3 into one of the frame body portions 3 a and the other of the frame body portions 3 b. . When the frame body part 3 is separated by the separation part 20, one of the separated frame body parts 3 a holds the yoke 5, and the other 3 b of the frame body part separated by the separation part 20 is the iron core part 2. Separated from. Then, the frame body portion 3 is, for example, a space portion 3c in which the magnetic pole teeth 4 can be exposed in a portion separated by the separation portion 20 so that the magnetic pole teeth 4 are exposed when separated by the separation portion 20. Is formed by punching. One of the separation parts 20 is formed by the protrusion 7, and the other part of the separation part 20 is formed by the recess 8 in which the protrusion 7 is fitted back. And between the recessed part 8 and the projection part 7, the hole part 9 utilized in the case of positioning and isolation | separation of the frame part 3 is formed.

  Unlike the “pushback” method described above, the protruding portion 7 can be formed by, for example, a “cut-bending” method as shown in FIG. Specifically, when the thin plate 14 is punched with a press die (FIG. 4A), the cut portion 14b is cut from the thin plate 14 with one end connected using the shear angle punch 17 (see FIG. 4A). FIG. 4 (b)). Thereafter, the cut portion 14b can be fitted back into the thin plate 14 by the spring portion 16 built in the die 15 (FIG. 4C). As in the case of the “pushback” described above, since there is a clearance between the shear angle punch 17 and the die 15, the cut portion 14 b extends in the surface direction of the thin plate 14. Therefore, it can hold | maintain in the press-fit state (refer to the press-fit part enclosed with the dotted line of FIG. 2) by fitting back the cutting part 14b in the thin plate 14. FIG.

  Further, the frame body portion 3 has a cutout portion 10 formed on the outer peripheral side of the portion where the separation portion 20 is formed. It is conceivable that the notch 10 is formed in, for example, a substantially triangular cross section whose width becomes narrower from the outer peripheral side toward the inner side. The frame part 3 can be easily separated by the separating part 20 by driving the wedge 11 having a shape corresponding to the shape of the notch part 10 toward the inside. Moreover, the separation part 20 is formed so that the contact area of the fitting back is smaller than other parts for separation and reduction. Specifically, the protrusion 7 is formed thinner than other portions.

  In FIG. 1A, an example in which one core part 2 is provided in the framed core sheet 6 is not limited to this. For example, as shown in FIG. The core part 2 and the frame part 3 are formed in plural, here two, a part of each frame part 3, here the other 3b of the frame part of the upper core part 2 in the drawing, and the lower part 1a of the frame part of the iron core part 2 is connected and formed. Further, the magnetic teeth 4 of each iron core portion 2 are arranged and formed in the same direction (in this case, downward in the drawing).

  Thus, the number of the iron core portions 2 formed in the framed iron core sheet 6 is not limited, and is appropriately set in the manufacturing method. Here, as a further specific example, as shown in FIG. 5, the following manufacturing method will be described in the case where three core parts 2 are provided in the framed core sheet 6. The framed iron core 1 is formed by laminating a plurality of the framed iron core sheets 6. Although the illustration of the connection configuration in the stacking direction is omitted, as in the conventional case, irregularities and the like are formed in the vertical direction, and they are pressed to fit together, or are welded, bonded, or the like Laminated and fixed. And what wound the electric wire 18 around the iron core part 2 formed in this way is formed as the iron core 21.

  Next, the manufacturing method of the iron core in the framed iron core of Embodiment 1 configured as shown in FIG. First, as shown in FIGS. 6 and 7A, the framed iron core 1 is held. Then, the wedge 11 is inserted from the direction of the arrow A into the notch 10 of the separation part 20 formed at the lowermost side of the framed iron core 1, and then pulled down in the direction of the arrow B. Then, the protruding portion 7 is separated from the concave portion 8 of the separating portion 20. As a result, the other 3b of the frame body portion is separated from the lowermost iron core portion 2, and the magnetic pole teeth 4 of the lowermost iron core portion 2 are exposed.

  Next, the electric wire 18 is wound around the exposed magnetic pole teeth 4 of the lowermost core portion 2 by the winding nozzle 19. At this time, since the frame body portion 3 does not exist in the vicinity of the magnetic teeth 4 to be wound, the winding can be easily performed. Next, when the winding to the magnetic pole teeth 4 is completed and the iron core 21 is formed, as shown in FIG. 7 (c), it is connected to the middle iron core portion 2 adjacent to the lowermost iron core portion 2. Then, one side 3a of the frame part of the lowermost core part 2 and the other part 3b of the frame part of the middle core part 2 are separated by the same method as described above. As a result, the wound iron core 21 and one of the frame parts 3a connected to the yoke 5 of the iron core 21 (including the other 3b of the frame part of the middle iron core part 2) are separated from the other parts. The

  Next, as shown in FIG. 8 (d), one side 3 a of the frame body part into which the iron core 21 is fitted is deformed and separated from the iron core 21. And as shown in FIG.8 (e), the iron core 21 by which winding was completed can be obtained. On the other hand, as shown in FIG. 7 (c), the iron core 21 and one of the frame body portions 3a connected to the yoke 5 of the iron core 21 (including the other frame body portion 3b of the middle iron core portion 2) are the other. By separating from the portion, the magnetic pole teeth 4 of the middle iron core portion 2 are exposed, so that the winding around the magnetic pole teeth 4, the separation of the frame body portion 3, the iron core, as in the case described above By repeating the separation of 21, as shown in FIG. 8 (f), the winding around the entire core portion 2 formed on the framed core 1 is completed, and the entire core 21 is formed. For example, as shown in FIG. 10, a shaft 32 rotating via a bearing 31, a magnet 33 disposed in contact with the periphery of the shaft 32, and a frame 34 around the magnet 33 are stacked and held. The electric motor 30 is formed by the iron core 21 thus made.

  Moreover, as a manufacturing method of the iron core in another iron core with a frame, for example, as shown in FIG. 9A (showing a side view of the holder 22), a holding projection 23 that can be inserted into the hole 9 is used. Are used for the number of the hole portions 9 (six in this case). The hole 9 of the framed iron core 1 is inserted into the holding projection 23 of the holder 22 (FIG. 9B), and the framed iron core 1 is held by the holder 22. As a result, the framed iron core 1 can be stably held and can be positioned easily. When the separation unit 20 performs the separation, only the holding projection 23 for separation is moved in the direction of arrow C, and the separation unit 20 performs the separation in the same manner as described above. Since the other steps are the same as those described above, description thereof is omitted. Note that separation by the holding projection 23 may be performed simultaneously with the step of using the wedge 11 for the notch 10.

  According to the iron core sheet with a frame according to the first embodiment configured as described above, the iron core portion can be easily separated because it includes the separation portion that can be cut and fitted back and separated from the frame body portion. it can. In this separation part, since it can isolate | separate in the surface direction of a core with a frame, the drawing distance of the thickness direction does not change. Therefore, in the case of a framed iron core, the force required for separation can be reduced, energy can be saved in separation, the separation mechanism can be simplified, and the separation mechanism can be reduced in size. . And since the installation which has a separation mechanism can be reduced in size and simplified, manufacturing cost can be reduced.

  Also, since one of the frame parts separated by the separation part holds the yoke, the other of the frame parts is separated from the iron core part, and the magnetic teeth are exposed, the frame part The wire can be easily wound around the magnetic teeth after the separation.

  In addition, since one of the separation portions is formed by the protrusion and the other is formed by the recess, the separation portion can be easily separated.

  Moreover, since the notch part is formed in the separation part, the separation part can be easily separated.

  In addition, since a plurality of iron core portions and frame body portions are formed and a part of each frame body portion is formed to be connected, positioning of the iron core with the frame is performed at the beginning of the winding process, so that the iron core with the frame is Since it is not necessary to perform positioning again until the winding of all the iron cores included in is completed, the manufacturing cost can be reduced by shortening the cycle time and simplifying the winding equipment.

  Moreover, since each magnetic pole tooth is arranged and formed in the same direction, winding of an electric wire can be performed easily.

  In addition, since a plurality of such framed core sheets are laminated to form a framed core, separation at the separation part is facilitated, and the manufacturing cost can be reduced.

  In addition, the iron core can be manufactured by a simple process of separating the separating portion, winding the electric wire around the magnetic pole teeth, and separating the iron core portion from the frame body portion, and a further electric motor can be obtained. .

  In Embodiment 1 described above, the shapes of the separation part 20 and the notch part 10 are as described above. However, the shape is not limited to this, and the shape has the same function as the case described above. Any other shape is possible, and the same effect can be achieved. In addition, the separation unit 20 is formed at two places and divided into two parts, but the present invention is not limited to this, and if the separation part 20 has the same function as the case described above, the number of separation parts 20 is not limited. For example, it can be formed in three places and divided into three parts, and the same effect can be obtained.

Embodiment 2. FIG.
In the first embodiment, a plurality of iron core portions are arranged in the vertical direction and one is shown in the horizontal direction. However, the present invention is not limited to this. In the second embodiment, a plurality of iron core portions are arranged in the horizontal direction. The case where it is set as one iron core part 2 by which the iron core part is connected and arrange | positioned is demonstrated. FIG. 11 is a diagram showing a configuration of a framed iron core sheet according to Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the frame-equipped core sheet 6, a plurality of core parts 2a, 2b, etc. are connected in the lateral direction, or the iron core parts 2c, 2d, etc. are connected, and the iron core parts 2e, 2f, etc. are connected. (In FIG. 11, nine iron core portions are connected in the horizontal direction and one iron core portion 2 is formed in the vertical direction). Adjacent iron core portions 2a, 2b, 2c, 2d, 2e, and 2f are formed such that both ends of the yoke 5 are thin and connected at the portions.

  As described above, a plurality of iron core portions 2 and frame body portions 3 are formed in the framed iron core sheet 6, and a part of each frame body portion 3, here, the frame body of the uppermost iron core portion 2 in the drawing. The other 3b of the center part is connected to one 3a of the frame part of the middle core part 2, the other 3b of the frame part of the middle core part 2 and one of the frame parts of the lowermost core part 2 3a are connected to each other. Further, the magnetic teeth 4 of each iron core portion 2 are arranged and formed in the same direction (in this case, downward in the drawing).

  According to the iron core sheet with a frame according to the second embodiment configured as described above, the same effect as that of the first embodiment is obtained, and after separating the other of the frame body parts from the iron core with the frame, Since the plurality of iron core portions are formed to be connected in the horizontal direction, the work of separating the iron core from the framed iron core and the winding work of the adjacent magnetic teeth can be performed in parallel. From this, since the cycle time of the manufacturing method of an iron core can be shortened, manufacturing cost can be reduced.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Iron core with a frame, 2 Iron core part, 3 Frame body part, 3a One of a frame body part, 3b The other of a frame body part, 4 Magnetic pole teeth, 5 Yoke, 6 Frame iron core sheet, 7 Protrusion part, 8 Recessed part,
9 holes, 10 notches, 13 punches, 18 electric wires, 19 winding nozzles,
20 separation part, 21 iron core, 22 holder, 23 holding projection part, 30 electric motor.

Claims (10)

On the same sheet,
An iron core composed of magnetic teeth and a yoke orthogonal to the magnetic teeth;
In the core sheet with a frame in which the frame body portion disposed on the outer periphery of the iron core portion is cut and fitted back,
The frame body part is an iron core sheet with a frame provided with a separating part that is cut and fitted back so that the frame body part can be separated. The frame part is
One of the frame parts separated by the separation part holds the yoke,
The other of the frame body part separated by the separation part is separated from the iron core part,
2. The framed iron core sheet according to claim 1, wherein the magnetic pole teeth are exposed when separated by the separation part. 3. The framed iron core according to claim 1, wherein one of the separated portions is formed by a protruding portion, and the other of the separated portions is formed by a recessed portion into which the protruding portion is fitted back. Sheet. The frame body core sheet according to any one of claims 1 to 3, wherein the frame body part has a notch formed on an outer peripheral side of a portion where the separation part is formed. In the iron core sheet with a frame according to any one of claims 1 to 4, a plurality of the iron core portions and the frame body portions are formed.
A framed core sheet formed by connecting a part of each of the frame parts. In the iron core sheet with a frame according to any one of claims 1 to 4, a plurality of the iron core portions and the frame body portions are formed.
The adjacent iron core portions are connected to each other at the end of each yoke, and
A framed core sheet formed by connecting a part of each of the frame parts. The said core part is a core sheet with a frame of Claim 5 or Claim 6 in which each said magnetic teeth are arranged and formed in the same direction. A framed iron core formed by laminating a plurality of framed iron core sheets according to any one of claims 1 to 7. In the iron core with a frame according to claim 8,
Separating the separation part;
Winding a wire around the magnetic pole teeth;
And a step of separating the iron core from the frame body. The electric motor provided with the iron core part of any one of Claims 1 thru | or 8.

Images