JP2002191141A - Manufacturing method of motor core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a motor core that can prevent deterioration of characteristics of a motor and appropriately maintain the mechanical strength of the entire core of the motor. SOLUTION: A stator having a stator core 11 having a plurality of salient poles 12 radially inwardly arranged at substantially equal pitch angles or different pitch angles, and an air gap inside the stator. When manufacturing an iron core of a motor comprising a rotor 7 having a rotor iron core 8 rotatably disposed through the stator core 11, the stator iron core 11 cuts the iron plate 2 punched by a punching die. A plurality of iron plates 2 are stacked on both ends of a central iron core 15 formed by laminating a predetermined number of iron plates 2 to be used, and partial iron cores 16 and 17 formed by fastening are fixed respectively. Formed. Since the distortion of the iron plate 2 forming the central iron core 15 due to the fastening is eliminated, the characteristic deterioration of the iron plate 2 is reduced, and the mechanical strength of the entire stator core 11 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a motor core, and more particularly, to a method for manufacturing a stator core.

[0002]

2. Description of the Related Art Conventionally, as a motor of this type, usually,
A stator having a stator core having a plurality of salient poles radially inwardly arranged at substantially equal pitch angles or different pitch angles, and an inner peripheral surface of the salient poles of the stator, And a rotor having a rotor core, which is rotatably disposed through an air gap.

Further, another electric motor, for example, a stepping motor has a plurality of salient poles radially inwardly arranged at substantially equal pitch angles or different pitch angles, and has a plurality of salient poles. A stator having a stator core in which a plurality of stator small teeth are formed at substantially equal pitches or at a certain pitch along an inner circumferential direction on an inner circumferential surface, and an inner circumferential surface of salient poles of the stator. A plurality of rotor small teeth are formed on the outer peripheral surface of the rotor so as to face the stator small teeth along the outer circumferential direction. And a rotor having an iron core.

As a manufacturing method when a laminated iron core is used for a stator or a rotor of the electric motor, as shown in FIG. 5, a strip-shaped electromagnetic steel sheet S is manufactured by punching an iron sheet 2 punched by a punching die having a predetermined shape. Used, a predetermined number of the iron plates are laminated until a predetermined lamination thickness is reached, and an electric motor core, for example, the illustrated stator core 1 is formed, and the stator core 1 is, as shown in FIG. The magnetic pole position 3 of the iron core 1 in the stacking direction.
Are fastened to the plurality of outer peripheral positions 4 using magnetic rivets or the like by riveting (caulking) or by pressing and deforming and fitting the iron core 1.

In this iron core manufacturing method, in order to secure the mechanical strength of the entire iron core 1 formed by laminating a predetermined number (a plurality) of the iron plates 2, the stator iron core 1 has a thickness direction. Therefore, it is necessary to fasten the magnetic pole position 3 and the outer peripheral portion position 4 with the rivet or the like. Also, the rotor core (not shown) also needs to be fastened (or fixed with an adhesive) by the rivet at a plurality of positions of the core in the stacking direction.

[0006]

However, in such a conventional iron core manufacturing method, the rivet or the like or the iron core 1 is deformed under pressure by a fastening method. , The iron plate (electromagnetic steel plate) near the caulking
2 has a problem that the characteristics of the electric motor are deteriorated due to magnetic distortion.

As a method of solving this problem, there is a method of eliminating the fastening by caulking of the rivet or the like at the magnetic pole position 3 which particularly affects the characteristic deterioration of the electric motor, as shown at A in FIG. Conceivable. However,
In this method, there is a problem that the strength of the entire stator core 1a of the electric motor is insufficient. In particular, FIG.
As shown in FIG. 8A and FIG. 8B, the electric motor frames 5 and 6 mounted on both ends of the stator core 1a are connected to stepped portions 5a and 5a formed inside the frames 5 and 6, respectively.
This tendency becomes remarkable when the stator core 1a is fitted to the inner peripheral surface of the stator core 1a via the core 6a. 7 is a rotor, 8
Is a rotor core, 9 is a rotating shaft, and 10 is a bearing.

[0008] The present invention has been made in view of such a point,
It is an object of the present invention to solve the above-mentioned problems, prevent a characteristic deterioration of the electric motor, and propose a method of manufacturing an electric motor core capable of appropriately maintaining the mechanical strength of the entire iron core of the electric motor.

Another object of the present invention is to solve the above problems,
An object of the present invention is to propose a method of manufacturing a motor core that can fit a stepped portion of the motor frame to an inner peripheral surface of the stator core when mounting the motor frames on both ends of the stator core.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, an embodiment of the present invention has a plurality of salient poles radially inwardly arranged at substantially equal pitch angles or at different pitch angles. When manufacturing an electric motor core comprising a stator having a stator core and a rotor having a rotor core rotatably disposed through an air gap inside the stator, the stator core is Is formed by using a steel plate punched by a punching die, a predetermined number of the iron plates, a central iron core formed by laminating, a plurality of the iron plates are laminated at both ends thereof, and fastened. This is a method for manufacturing a motor core formed by fixing partial iron cores.

A plurality of salient poles are disposed radially inward at substantially equal pitch angles or at different pitch angles, and the inner circumferential surface of the salient poles has substantially equal pitches along the inner circumferential direction. Or a stator having a stator core in which a plurality of stator teeth are formed at a certain pitch, and a rotor having a rotor core rotatably disposed inside the stator via a gap. When manufacturing an iron core of an electric motor including a stator, the stator iron core uses an iron plate punched by a punching die, and a predetermined number of the iron plates are formed. This is a method for manufacturing a motor core formed by laminating a plurality of the iron plates at both ends and fixing the partial cores formed by fastening, respectively.

[0012] This is a method for manufacturing a motor iron core, wherein the iron plate has an adhesive applied to both surfaces thereof.

[0013] Regarding the laminated thickness of each of the partial cores of the stator core, for the positioning of the rotor, the rotation of the rotor is provided inside each of motor frames disposed at both ends of the stator core. A method for manufacturing a motor core having a thickness sufficient to fit the two motor frames to respective inner peripheral surfaces of the partial cores via a step having an outer peripheral surface formed concentrically with an axis. .

Since the method for manufacturing a motor iron core of the present invention is configured as described above, the stator iron core uses an iron plate punched by a predetermined punching die, and a predetermined number of the iron plates are laminated. And a partial core fixed to both ends thereof and formed by laminating a plurality of the iron plates less than the predetermined number, and each of the partial cores is A rivet or the like made of a magnetic material is used at a plurality of outer peripheral positions including the magnetic pole position of the partial iron core, and the rivet is tightened (caulked) or the iron core is pressurized and deformed and fitted.

In order to prevent the characteristics of the motor from deteriorating, the central iron core does not need to be caulked with a rivet or the like at the position of the magnetic pole which affects the characteristics. The lamination thickness of each of the partial cores is sufficient to fit an inner peripheral surface of a motor frame mounted at both ends of the fixed core with a step formed inside each of the motor frames. It is enough if it has sufficient thickness and mechanical strength.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of a method for manufacturing an electric motor core according to the present invention, which is manufactured based on the method.
FIG. 2 is a perspective view showing a configuration of a stator core and a partial core as a laminated motor core, FIG. 2 is a perspective view showing a central core of the stator core, and FIG. 3 is a perspective view showing the partial core. The same members as those in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.

The motor core of the present embodiment comprises a stator core 11 of a stator shown in FIG. 1 and a rotor core of a rotor (not shown). The stator core 11 shown in FIG. 1 has a plurality of salient poles 12 radially inwardly arranged at substantially equal pitch angles or at different pitch angles, and has an inner peripheral surface of the salient poles 12. A plurality of stator small teeth 13 are formed at a substantially equal pitch or a certain pitch along the inner circumferential direction. The rotor (not shown) is rotatably disposed inside the stator via an air gap, and its rotor core faces the stator teeth 13 of the stator core 11. A plurality of rotor teeth are formed on the outer peripheral surface at a substantially equal pitch along the outer peripheral direction.

The stator core 0 shown in FIG. 1 uses an iron plate 2 punched by a desired punching die, and a predetermined number of the iron plates 2 are laminated to form a central iron core 15. A number less than the predetermined number, which is disposed at each end,
And two partial iron cores 16 and 17 formed by laminating a plurality of the iron plates 2. In consideration of the mechanical strength and magnetic characteristics of the stator core 11, the central core 15 and the two partial cores 16, 17 are formed by different manufacturing methods.

That is, as shown in FIG. 2, the central iron core 15 is formed at a plurality of (eight in FIG. 2) outer peripheral positions 4 of the iron core 2 after a predetermined number of the iron plates 2 are laminated. A rivet made of a magnetic material is inserted into each of the caulking holes, and the rivet is fastened so as to form the iron core 15 by riveting (caulking), or the iron core is deformed under pressure and fitted. To conclude. In this case, riveting or the like is not performed on the magnetic pole position 3 of the iron core 15. This is because the magnetic properties of the iron core 15 are not impaired.

As shown in FIG. 3, the two partial iron cores 16 and 17 are formed by laminating a plurality of (two to several or more) iron plates 2 and then forming a plurality of the iron cores 16 and 17. A caulking hole formed at an outer peripheral position 4 (8 places in FIG. 3) and a caulking hole at a magnetic pole position 3 on a center line of a plurality of (10 poles in FIG. 3) magnetic poles 12. At this time, a rivet made of a magnetic material is inserted, or the iron core is pressed and deformed and fitted, and the rivets are caulked and fastened to form the iron cores 16 and 17. in this case,
The riveting or the like is performed at the magnetic pole position 3 on the center line of the magnetic poles 12, 12 of the iron cores 16, 17.
In order to improve mechanical strength (for example, rigidity) more than the magnetic characteristics as 7, the step portions 5a, 6a of the electric motor frames 5, 6 to be mounted on the inner peripheral surfaces of the magnetic poles of the partial iron cores 16, 17 are provided. Are considered in consideration of the mechanical strength when each is fitted.

Thereafter, as shown in FIG. 1, the partial iron cores 16 and 17 are respectively fastened and fixed to the central iron core 15 at both ends thereof with mounting screws (not shown) through mounting holes 18. Thus, the stator core 11 is formed.

Also, the central iron core 15 and the two partial iron cores 16 and 17 constituting the stator iron core 11 are respectively formed. The iron plate 2 is coated with an adhesive on both surfaces thereof. That you may use Needless to say.

Further, with respect to the central core 15, the partial cores 16,
Regarding the lamination thickness of 17, that is, the number of the iron plates 2 to be laminated, as shown in FIG. 4, for positioning the rotor 7, the motor frames 5, 6 mounted on both ends of the stator core 11 are positioned. Inside each of them, there is provided a stepped portion 5a, 6a having an outer peripheral surface which is concentric with the center line axis of the bearings 10, 10 arranged, that is, the axis of the rotating shaft 9 of the rotor 7, and which is parallel to the center axis. It is necessary that the thickness of the partial iron cores 16 and 17 be sufficient to mount the two motor frames 5 and 6 while being fitted to the inner peripheral surfaces of the respective magnetic poles.

Further, in the present embodiment, it is natural that the stator core can correspond to the rotor core, and the rotor core can correspond to the stator core.

Note that the technology of the present invention is not limited to the technology in the above-described embodiment, but may be implemented by means of other modes that perform the same function. Can be changed or added.

[0027]

As is apparent from the above description, according to the method for manufacturing a motor core of the present invention, a plurality of radially inwardly arranged at substantially equal pitch angles or different pitch angles are provided. A stator having a stator core having salient poles, and a stator having a rotor having a rotor core, which is rotatably disposed through an air gap inside the stator, when manufacturing an iron core of an electric motor, The stator core uses an iron plate punched by a punching die, and a predetermined number of the iron plates are stacked on a central core formed by stacking a plurality of the iron plates at both ends thereof and fastened. Since the partial iron cores formed by the above are fixedly formed, it is possible to prevent the characteristic deterioration of the electric motor and appropriately maintain the mechanical strength of the entire iron core of the electric motor.

Further, when the motor frame is mounted on both ends of the stator core, the stepped portion of the motor frame can be fitted to the inner peripheral surface of the stator core.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a method for manufacturing a motor core according to the present invention, and is a configuration perspective view of a stator core and a partial core as a laminated motor core manufactured based on the manufacturing method.

FIG. 2 is a perspective view showing a central core of the stator core.

FIG. 3 is a perspective view showing the partial core.

FIG. 4 is a cross-sectional view illustrating a required lamination thickness of a partial core of the stator core.

FIG. 5 is a perspective view showing a stator core manufactured by a conventional motor core manufacturing method.

FIG. 6 is a perspective view showing a stator core of the electric motor core shown in FIG. 5;

FIG. 7 is a perspective view showing the stator core of FIG. 6 which has no fastening by caulking with rivets or the like at the magnetic pole position.

8 is a view showing a cross section before and after mounting an electric motor frame on both ends of the stator core of FIG. 7; FIG. 8 (a) is a cross-sectional view before mounting, and FIG. It is sectional drawing.

[Explanation of symbols]

 1, 1a, 11 Stator 2 Iron plate (electromagnetic steel plate) 3 Magnetic pole position 4 Outer peripheral position 5, 6 Motor frame 5a, 6a Stepped portion 7 Rotor 8 Rotor core 9 Rotary shaft 10 Bearing 12 Salient pole 15 Central core 16 , 17 Partial iron core 18 Mounting hole S Strip-shaped electromagnetic steel sheet

Claims (4)

[Claims] A stator having a stator core having a plurality of salient poles radially inwardly arranged at substantially equal pitch angles or different pitch angles, and a gap formed inside the stator. When manufacturing an iron core of a motor comprising a rotor having a rotor iron core, which is rotatably disposed via the iron core, the stator iron core uses an iron plate punched by a punching die. A plurality of iron plates are laminated on both ends of a central core formed by laminating a predetermined number of iron cores, and partial iron cores formed by fastening are fixedly formed, respectively. Iron core manufacturing method. 2. A plurality of salient poles radially inwardly arranged at substantially equal pitch angles or at different pitch angles, and an inner peripheral surface of the salient poles is formed substantially along an inner circumferential direction. A stator having a stator core having a plurality of stator teeth formed at an equal pitch or a certain pitch, and a rotor core rotatably disposed through an air gap inside the stator. When manufacturing an iron core of a motor having a rotor having, the stator iron core, using an iron plate punched by a punching die, a predetermined number of the iron plate, a central core formed by laminating. A method for manufacturing an electric motor core, comprising: laminating a plurality of the iron plates on both ends thereof; and fixing the partial iron cores formed by fastening to each other. 3. The method for manufacturing an electric motor core according to claim 1, wherein the iron plate has an adhesive applied to both surfaces thereof. 4. The laminated thickness of each of said partial cores of said stator core is determined for positioning said rotor.
The two motor frames are connected to the inner periphery of each of the partial cores via a step formed concentrically with the rotation axis of the rotor inside each of the motor frames provided at both ends of the fixed core. 3. The method for manufacturing a motor core according to claim 1, wherein the thickness is sufficient to be fitted to the surface.