JP2003180043A - Stator for motor of compressor, and method of manufacturing the stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for the motor of a compressor, which is easily secured of perpendicularity with respect the axis of an iron core. <P>SOLUTION: In the stator for the motor of the compressor which is made by stacking a plurality of sheets of iron cores equipped with projections for calking and calking holes in order of die cutting and mounting ancillary parts such as winding to these iron plates, a half of the stacked iron cores are inverted upside down, and at each of the faces on the side of the projections for calking, the calking holes of the same outside and inside peripheral forms as the iron cores and made in the same positions of the projections for calking the iron cores. Further, iron cores for mating, which are equipped with through holes for passing these projections for calking in the same positions as those of projections for calking the iron cores, are piled on the top of one another, and the iron cores for mating are mated to each other thereby stacking the iron cores. Therefore, laying the iron cores for mating on the top of the half iron cores stacked and calking them facilitates the true up of the iron cores and to secure the perpendicularity of the axis of the iron core, since the number of stacked sheets is a half. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of an electric motor used in a compressor of a refrigerant circuit, and a method for manufacturing the stator.

[0002]

2. Description of the Related Art The stator of an electric motor used in a compressor is
For example, as described in Japanese Unexamined Patent Publication No. 2000-37051, electromagnetic steel plates are punched into the shape of a stator, the punched products are sequentially laminated, and fixed by caulking to manufacture a stator. Was there.

[0003]

The stamped-out stator is a unit that applies force to all the laminated iron cores at once to integrate them, and there is a risk that the squareness of the iron core with respect to the axis line will deviate. As a cause of this, although it is attempted to align and stack them using a jig or the like, it is considered that the squareness tends to shift because of the large number of layers to be stacked.

The present invention provides a stator of an electric motor for a compressor, in which it is easy to secure a right angle to the axis of the iron core.

[0005]

In order to solve the above-mentioned problems, the present invention comprises a caulking projection on an iron core and a caulking hole into which a caulking projection of another iron core is fitted when the iron core is turned upside down. , The iron core is punched out so that the inner circumference and the outer circumference are approximately the same when the iron core is turned upside down, and the iron core is formed by laminating a plurality of iron cores in the order in which they have been punched. In a stator of a compressor electric motor in which accessory parts are mounted, a part of the laminated iron core is turned upside down, and each of the caulking projection side surfaces has the same outer core and inner peripheral shape as the iron core. And, a caulking hole is formed at the same position as the caulking hole of the iron core, and further, a mating surface iron core is provided at the same position as the caulking projection of the iron core, the mating surface iron core having a through hole through which the caulking projection is passed. Iron cores were laminated by combining the iron cores Than it is.

Further, a part of the iron core is half the number of laminated iron cores.

Further, the protrusion size of the projection is determined by the thickness of the iron core 1
The number is set to be no less than 2 and no more than 2.

Further, the iron core is provided with a caulking projection and a caulking hole into which a caulking projection of another iron core is fitted when the iron core is turned upside down, and the inner circumference and the outer circumference are turned upside down. Sometimes, in the method of manufacturing a stator for a compressor electric motor, in which iron plates are punched out so as to be approximately the same and the iron cores are laminated, a plurality of these iron cores are laminated in the order in which the iron cores are punched, and half of them are front and back. While reversing, each of the caulking projection-side surfaces has the same outer shape and inner peripheral shape as the iron core, and a caulking hole is formed at the same position as the caulking hole of the iron core, and the caulking of the iron core is further performed. The mating surface iron cores having through holes through which the caulking projections pass are stacked at the same position as the forging protrusions, and each of them is integrally formed by caulking, and after the mating surface iron cores of these caulking iron cores are joined together, these Of iron cores It welded integrally, and further in the production process so as to mount the accessory parts such as winding, to produce a stator of the stator of the compressor motor.

[0009]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to the drawings.

1 to 4 show a first embodiment,
FIG. 1 is a front view of an iron core of a stator in a compressor electric motor,
FIG. 2 is a front view of an iron core for a mating surface of a stator, FIG. 3 is an explanatory view showing how a stator iron core is punched out from an iron plate, and FIG. 4 is an explanatory view showing how the same stator iron core is laminated. In this stator, a stack of 100 iron cores will be described.

As shown in FIGS. 1 and 2, there are two kinds of laminated iron cores, and 98 and 2 iron cores are used respectively.

In the iron core 1 shown in FIG. 1, the shape of the inner circumference 1A and the shape of the outer circumference 1B are formed in line symmetry with respect to the line of symmetry P. Therefore, even if the front and back are inverted about the symmetry line P, the shapes of the inner circumferences 1A and the shapes of the outer circumferences 1B match each other.

Reference numerals 2A, 2B, 2C, and 2D are caulking projections, which project, for example, toward the front side of the drawing and have a height of about 0.5.
It is set to 5 mm. 3A, 3B, 3C and 3D are caulking holes, and when the other iron core 1 is turned upside down with respect to the symmetry line P, the caulking projections 2D, 2C, 2B and 2A.
But they fit together. 4A, 4B, 4C,
4D is a bolt hole for integrating 100 laminated iron cores. Therefore, the bolt holes 4A, 4B
And the bolt holes 4D and 4C with the symmetry line P as symmetry,
It is located in line symmetry. Also, the caulking holes 3A, 3B,
Caulking protrusions 2A and 2B and caulking protrusions 2D and 2C,
The caulking holes 3D and 3C are positioned in line symmetry with respect to the symmetry line P.

Reference numeral 5 is a tooth portion, and 6 is a slot opening into which an insulating material and a winding wire are inserted. Reference numeral 8 denotes an opening formed in a circular shape, in which a rotor (not shown) having a rotating shaft is arranged. The compressor electric motor is assembled such that the axis passing through the center of the opening 8 coincides with the axis of the rotating shaft.

Numeral 9 shown in FIG. 2 is an iron core for mating surfaces, which is similar to that shown in FIG. 1 and includes caulking holes 3A, 3B, 3C and 3D, bolt holes 4A, 4B, 4C and 4D, tooth portions 5 and slot openings. 6, an opening 8 is formed. Further, the mating surface iron core 9 has the same outer peripheral 9B shape and inner peripheral 9A shape of the iron core 1.

Reference numerals 10A, 10B, 10C and 10D are through holes, and when they are superposed on the surface of the iron core 1 on which the caulking projections 2A, 2B, 2C and 2D are formed, the caulking projection 2 is formed.
A, 2B, 2C and 2D are the through holes 10A, 10B and 10
It projects from C and 10D.

Further, at this time, the caulking projections 2A, 2
The projecting heights of B, 2C, and 2D from the iron core 9 are set within the thickness of the iron core 1 within one sheet, for example, about 0.2 mm (see FIG. 4).

In FIG. 3, 11 is an iron plate having a thickness of 0.
A 35 mm one is used. However, when strictly measured, the thickness is a <b as shown in the XX cross section.
As described above, there is a slight variation in thickness, and in the case of stacking a plurality of sheets, there is a large variation, so some measure is required.

Then, the iron plate 11 is punched into the shape of the iron core 1 and laminated in this order. Although only three iron cores 1 are drawn on the iron plate 11, it is necessary to draw a large number of iron cores 1 which are punched with their outer circumferences partially in contact with each other, but the other iron cores 1 are not shown. . The mating surface iron core 9 is also formed by punching from the iron plate 11.

Reference numeral 12 shown in FIG. 4 is a burr generated when the iron plate 11 is punched, and is formed in the punching direction.
Reference numeral 13 denotes an iron core block in which 49 iron cores 1 and one mating surface iron core 9 are superposed, and two iron core blocks 13 are used for the stator.

Such a stator is used in an electric motor for a refrigerant compressor, and a method of manufacturing the stator will be described next.

First, the iron core 1 is punched out from the iron plate 11,
The iron cores 1 are laminated in the order of punching. Forty-nine iron cores are stacked, and one mating surface iron core 9 is stacked on the surface on which the caulking projections 2A, 2B, 2C, and 2D are formed. Then, these 49 iron cores 1 and one mating surface iron core 9 are caulked by applying a force from the back side of the caulking projections, and a total of 50 iron cores are integrated to form an iron core block 13.

Then, another iron core block 13 is made, and the iron cores 9 are laminated so that the mating surface iron cores 9 are in contact with each other, and the iron cores are laminated. Then, as each iron core block 13 and the iron core block 13 are crimped together,
Perform argon welding on the outer periphery. This argon welding is performed on the outer circumference of the iron core, and also has the purpose of reducing vibration.

Also, bolts are tightened to mount an unillustrated component such as an insulating material (insulating sheet). Further, windings are inserted into the slot openings 6 between the tooth portions 5 and the tooth portions 5 to assemble the stator.

That is, the stator of this compressor electric motor has the iron core 1 and the caulking projection 2 as described in claim 4.
A, 2B, 2C, 2D, and the caulking holes 3A, 3B, 3C, 3D into which the caulking projections 2D, 2C, 2B, 2A of the other iron core 1 fit when the iron core 1 is turned upside down, A method of manufacturing a stator for a compressor motor, in which an iron plate is punched out to form the iron core 1 so that the inner circumference and the outer circumference are substantially the same when the iron core 1 is turned upside down, and the iron core 1 is laminated in plurality. In, in order of punching out the iron core 1, for example, 98 sheets are laminated and half of the 49 sheets are turned upside down, and the outer surface and the inner peripheral shape of the iron core 1 are the same as those of the surface on the projection side for caulking. And a mating surface in which a caulking hole is formed at the same position as the caulking hole of the iron core, and through holes 10A, 10B, 10C, 10D through which the caulking protrusions pass are further provided at the same position as the caulking protrusion of the iron core. Stack iron cores 9 It formed integrally with people by caulking, the mating surface for the iron core 9 of caulked iron (iron core block 13)
After the iron cores (the iron core blocks 13) are welded and integrated with each other, the stator of the electric motor for the compressor is manufactured by a method of attaching accessory parts such as windings to the iron cores. .

In the stator having such a structure, the laminated iron cores 1 are crimped into halves so as to be integrated, and further, these are integrated, so that the number of iron cores when crimping at once is reduced to half, The squareness of the iron core with respect to the axis is easy to secure, and it is difficult to slip.

Further, even if there is a minute difference in the thickness of the iron plate 11 for punching out the iron core 1, by reversing, the minute difference in the thickness is canceled or reduced, and the deviation of the thickness can be suppressed. . The function of suppressing this deviation is also a factor that makes it difficult to shift the squareness of the iron core from the rotating shaft.

The caulking projections 2A, 2B, 2C, 2
Since the protrusion dimension of D is set to be 1 to 2 in thickness of the iron core 1, the protrusion height of the caulking protrusions 2A, 2B, 2C, 2D protruding from the iron core 1 when the iron cores 9 for mating surfaces are stacked is It will be within 1 iron core, and when crimping half iron core 1,
The caulking protrusions 2A, 2B, 2C, and 2D can be caulked without being deformed so much, the squareness of the iron core with respect to the axis line is unlikely to shift, and the squareness can be stabilized.

In this way, it is easy to secure the squareness, and
Since it can be prevented from slipping, it is easy to set the air gap between the stator and the rotor at a predetermined interval, and it is possible to prevent air gap defects.

In this stator, the surfaces on the protruding side of the burr 12 face each other, so that the burr 12
Is directed inward and does not protrude outward, so that damage to the insulating material for inserting the winding into the slot opening 6 and the winding is prevented.

In this embodiment, a method of dividing the iron core into two blocks of 50 pieces each and integrating them is shown, but it may be divided into three or more blocks and integrated. Absent. In this case, it is better to direct the protruding direction of the burr inward so as not to damage the wiring or the like.
In this case, it is desirable that the number of iron cores in each block be the same, but it is considered that the number of iron cores does not necessarily have to be the same.

As an embodiment of the winding method, FIGS. 1 to 4 show examples of distributed winding. In other embodiments, a coil is directly wound around a tooth portion, that is, a so-called direct winding. It may be applied to the expression stator.

For example, the iron core 2 as shown in FIGS.
The present invention may be applied to Nos. 1 and 22. This Figure 5
23 is a tooth portion, 24 is a slot opening, 25A, 25
B, 25C, 25D are projections for crimping, 26A, 26B,
Reference numerals 26C and 26D are through holes into which these protrusions are inserted, and P is a line of symmetry.
The shape of A is formed symmetrically. Therefore, even if the front and back surfaces are reversed, the outer peripheries 21B and the inner peripheries 21A will not be misaligned.

The mating surface iron core 22 shown in FIG.
Through holes 27A, 27B, 27C and 27D through which the caulking projections 25A, 25B, 25C and 25D pass are formed.
The positions where the through holes 27A, 27B, 27C, 27D are formed are the caulking projections 25A, 25B, 25.
It is set at the same position as C and 25D, and when the iron core 22 is superposed on the surface of the iron core 21 on which the protrusions are formed, the through holes 27A, 27B, 27C, and 27D cause the caulking protrusion 25.
A, 25B, 25C and 25D are projected.
Incidentally, 22A is an inner circumference and 22B is an outer circumference, which are formed in line symmetry with respect to the line of symmetry P, similarly to 21A and 21B.

The stator manufactured by the iron cores 21 and 22 thus constructed has the same effect as that of the above-mentioned stator. That is, the deviation of the stack thickness can be suppressed. Further, it is possible to stabilize the squareness and suppress the deviation of the axis line. Further, it is possible to prevent the possibility of damaging the winding wire and the insulating material.

[0036]

As described above, according to the first aspect of the present invention, in the stator of the compressor electric motor, a part of the laminated iron cores is turned upside down so that the caulking projection side surface is Each has the same outer peripheral and inner peripheral shape as the iron core, and a caulking hole is formed at the same position as the caulking hole of the iron core, and further, the caulking protrusion of the iron core is formed at the same position as the caulking protrusion. Since the cores for mating surfaces with through holes are stacked and the cores for mating surfaces are laminated together, the laminated cores can be separated and crimped together, so the number of iron cores when crimping is small It is difficult to secure the squareness of the iron core with respect to the axis.

According to the second aspect of the present invention, since a part of the iron core is half the number of laminated iron cores, the number of laminated iron cores is hard to make a mistake and the manufacturing is easy. Moreover, even when it is installed in the compressor electric motor, it can be installed without worrying about the directionality, and the manufacturing is easy.

According to the third aspect of the present invention, since the projection size of the protrusion is set to be 1 to 2 in thickness of the iron core, the caulking protruding from the iron core when the mating surface iron cores are stacked. The projecting height of the projecting protrusion is within one iron core, and when crimping half the iron core, it is possible to crimp without deforming the crimping protrusion so much that the squareness of the iron core with respect to the axis line is difficult to shift Can be stabilized.

According to the invention of claim 4, the iron cores are laminated in the order in which they are punched out, half of them are turned upside down, and the iron core, the outer circumference and the inner circumference are provided on each of the caulking projection side surfaces. A mating surface iron core having the same shape and a caulking hole formed at the same position as the caulking hole of the iron core, and further having a through hole through which the caulking protrusion is formed at the same position as the caulking protrusion of the iron core. After stacking them, they are integrally formed by crimping, the mating surfaces of the crimped iron cores are aligned, then these iron cores are welded together to be integrated, and further, attached parts such as windings are compressed. Since the stator of the electric motor for machines is manufactured, the iron cores are crimped in half, so the number of crimped iron cores is small and it is difficult to shift, and it is easy to secure the perpendicularity of the iron core to the axis.

[Brief description of drawings]

FIG. 1 is a front view of an iron core of a stator in a compressor electric motor according to the present invention.

FIG. 2 is a front view of an iron core for a mating surface of the stator.

FIG. 3 is an explanatory diagram showing how a stator core is punched out from an electromagnetic steel plate.

FIG. 4 is an explanatory diagram showing a state in which the stator cores are stacked.

FIG. 5 is a front view showing an iron core of a stator for a direct-winding type electric motor.

FIG. 6 is a front view of an iron core for a mating surface of a stator for a direct-winding electric motor.

[Explanation of symbols] 1 iron core 1A inner circumference 1B outer circumference 2A, 2B, 2C, 2D Caulking protrusion 3A, 3B, 3C, 3D Caulking hole 9 Iron core for mating surfaces 9A inner circumference 9B outer circumference 10A, 10B, 10C, 10D Through hole 11 iron plate 21 iron core 21A inner circumference 21B outer circumference 22 Iron core for mating surfaces 22A inner circumference 22B outer circumference 25A, 25B, 25C, 25D Caulking protrusion 26A, 26B, 26C, 26D Caulking hole 27A, 27B, 27C, 27D Through hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuichi Idei             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Katsuyuki Takeda             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 5H002 AA06 AA07 AB01 AC00                 5H615 AA01 BB14 PP01 PP06 SS05                       SS06 SS15

Claims (4)

[Claims] 1. An iron core is provided with a caulking protrusion and a caulking hole into which a caulking protrusion of another iron core is fitted when the iron core is turned upside down, and when the iron core is turned upside down on an inner circumference or an outer circumference. To form the iron core by punching iron plates to be substantially the same as above, stacking a plurality of iron cores in the order in which they have been punched, and attaching stator parts such as windings to these iron plates in the stator of the compressor motor. A part of the laminated iron core is turned upside down, and each of the caulking projection-side surfaces has the same outer and inner peripheral shapes as the iron core, and the caulking hole is located at the same position as the caulking hole of the iron core. Is further formed, the iron core for mating surfaces having a through hole through which the projections for caulking pass is overlapped at the same position as the caulking projections of the iron core, and the iron cores are laminated by combining the iron cores for mating surface. Stator of electric motor for compressor. 2. The stator of a compressor electric motor according to claim 1, wherein a part of the iron core is half the number of laminated iron cores. 3. The stator for a compressor electric motor according to claim 1, wherein the protrusion size of the protrusion is set to be 1 to 2 in thickness of the iron core. 4. An iron core is provided with a caulking protrusion and a caulking hole into which a caulking protrusion of another iron core fits when the iron core is turned upside down, and when the iron core is turned upside down on its inner circumference or outer circumference. In the method for manufacturing a stator for a compressor electric motor, in which an iron plate is punched out so that the iron cores are substantially the same, and a plurality of these iron cores are laminated, the iron cores are laminated in the order in which they are punched, and half of them are turned upside down. In addition, each of the caulking projection-side surfaces has the same outer shape and inner peripheral shape as the iron core, and a caulking hole is formed at the same position as the caulking hole of the iron core. The mating surface iron cores with through holes through which the caulking projections pass are stacked at the same position as the projections, and each of these is integrally formed by caulking, and after mating the mating surface iron cores of these caulked iron cores, these Welding iron cores together The method for manufacturing a stator for a motor for a compressor, characterized in that an additional component such as a winding is attached.