JPH04372552A - Laminated core for stator of motor - Google Patents

Abstract

PURPOSE:To provide a laminated core for the stator of a motor, wherein any special jig is not required, and respective laminated magnetic pole core parts are supported at predetermined spaces, and further, its winding work and its pressing work are easy too. CONSTITUTION:A laminated core for the stator of a motor comprises a laminated yoke core section 26 and a laminated magnetic pole core section 24. The laminated yoke core section 26 is constructed by laminating in succession yoke core pieces, on whose inner sides provided are a number of mounting grooves 27, as joining the pieces to each other with protrusions for caulking. The laminated magnetic pole core section 24 is constructed by laminating in succession magnetic pole core pieces, wherein on their inner sides formed are a plurality of magnetic poles divided into groups not less than two and the adjacent magnetic poles to each other are partially in connection with each other, as joining the pieces to each other with the protrusions for caulking. Outer side parts 28 of the laminated magnetic pole core section 24 are mounted in the mounting grooves 27 of the laminated yoke core section 26. Further, the laminated magnetic pole core section 24 comprises a principal part 20 and connection magnetic pole parts 23, 22. In the principal part 20, the groups of the magnetic poles are formed by laminating the magnetic pole core pieces in succession, and between the respective groups, gaps 21 are provided. The connection magnetic pole parts 23, 22 are fastened on the top face and the undersurface of the principal part 20, and they are lamination-joined to the principal part 20 by shifting the phases of the gaps in their circumferential directions respectively.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a laminated iron core used in a stator of an electric motor, and more particularly to a laminated iron core that is composed of separately laminated laminated magnetic pole core parts and a laminated yoke iron core part to which the laminated magnetic pole iron core parts are attached. Regarding the laminated core of the stator.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 4, a stator core of an electric motor is formed by press forming a large number of inner magnetic poles 10,
Stator core piece 12 press-molded with caulking protrusion 11
However, since the magnetic pole 10 is on the inside, winding is difficult, and automation of the winding work is also difficult. Therefore, the present applicant first applied for
As shown in Publication No. 12378, the stator core is separated into an outer laminated yoke core and a laminated magnetic pole part attached to the laminated yoke core and divided for each magnetic pole, and the winding is automated. We have proposed a method for manufacturing stators for rotating electrical machines that can be used in a variety of ways.

0003

[Problems to be Solved by the Invention] However, in the laminated core used in the stator of a rotating electrical machine proposed in the above-mentioned Japanese Patent Publication No. 57-12378, the inner laminated magnetic pole portions are all disjointed, so the winding Furthermore, there is a problem in that a jig is required to hold the laminated magnetic pole portion in a predetermined position during installation, which complicates the device and further complicates the manufacturing process. The present invention has been made in view of the above circumstances, and is an electric motor in which each laminated magnetic pole is held at a predetermined interval without the need for a special jig, and which facilitates assembly such as pressing work, winding, and mounting. The purpose is to provide a laminated core for stators.

0004

[Means for Solving the Problem] A laminated core for a stator of an electric motor according to claim 1, which meets the above object, is provided by sequentially laminating and polymerizing yoke core pieces each having a large number of mounting grooves on the inside with caulking protrusions. A laminated yoke core portion consisting of a laminated yoke core portion and a magnetic pole core piece in which a plurality of divided tooth-shaped magnetic poles are formed and adjacent magnetic poles of each group are partially connected are sequentially laminated and polymerized using caulking protrusions, and the above-mentioned attachment is performed. and a laminated magnetic pole core part in which the outer side of the magnetic pole is attached to the groove, and the laminated magnetic pole core part has a main part in which the magnetic pole core pieces are sequentially laminated and has a gap between each group, and a main part having a gap between each group, and a part above and below the main part. and a connecting magnetic pole part which is fixedly fixed to the magnetic pole part and is roll-welded with the gap phase shifted in the circumferential direction.

[0005]

[Operation] In the laminated core for a stator of an electric motor according to claim 1, all the magnetic poles of the laminated magnetic pole core are divided into two or more groups, and the magnetic poles are formed by partially connecting adjacent magnetic poles. It consists of a main part made of sequentially laminated iron core pieces, and a connecting magnetic pole part made by rolling and joining magnetic pole pieces fixed above and below the main part, so when the laminated magnetic pole iron part is assembled,
The divided main parts are joined together in the mold by the upper and lower connecting magnetic pole parts to become a single body. Therefore, each magnetic pole in the assembled state maintains a constant spacing, and furthermore, since the outside of the laminated magnetic pole iron core is open, winding can be easily done without using a jig. It has an effect. Further, the magnetic pole core piece constituting the main portion and the magnetic pole core piece constituting the upper and lower connecting magnetic pole parts can be made to have the same shape, which has the effect of simplifying the pressing process.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic perspective view for explaining the manufacturing process of a laminated core for a stator of an electric motor according to an embodiment of the present invention.
FIG. 2 is a plan view of the same, and FIG. 3 is a perspective view of the same.

First, with reference to FIGS. 1 and 2, a manufacturing and assembling process for a laminated core for a stator of an electric motor according to an embodiment of the present invention will be described. FIG. 2 shows a strip 15 made of a silicon steel plate or the like, showing the process of forming a magnetic pole core piece and a yoke core piece by press forming. first,
As shown in FIGS. 2(A) and 2(B), the puncher 16
Then, as shown in FIG.
9e (shown in FIG. 1) and punched into a lower blank die (not shown). The magnetic pole core pieces 19a to 19e punched here have the same shape and each have three magnetic poles, and adjacent magnetic poles in the magnetic pole core pieces are partially connected. Therefore, in this embodiment, the 12 magnetic poles are divided into four groups, and each magnetic pole core piece 19a
This means that three magnetic poles are formed in ~19e. Incidentally, well-known caulking protrusions (not shown) are formed on each of the magnetic pole core pieces 19a to 19e in accordance with the indexing angle of the magnetic poles, so that they can be laminated and superposed one after another.

[0008] The blank die is provided with a rotation mechanism including a blank holder, and can be rotated by an angle (referred to as α degrees) corresponding to the angle of magnetic poles arranged radially equally. As shown in FIG. 1, the lowermost magnetic pole core piece 19a
When it is drawn into the blank die, it is rotated by α degrees, and the second magnetic pole core piece 19b is shifted by α degrees and laminated and polymerized. After the second magnetic pole core piece 19b is laminated and polymerized, it is immediately rotated further by α degree in the same direction.
The subsequent magnetic pole core pieces 19c are laminated and polymerized. Then, after laminating and polymerizing the third magnetic pole core piece 19c from the top at the same angle, the blank die rotates in the circumferential direction by α degree to laminate and polymerize the second magnetic pole core piece 19d from the top, and immediately further α The uppermost magnetic pole core piece 19e rotates in the circumferential direction.
are laminated and polymerized. As a result, the main part 20 consisting of a large number of pole core pieces 19c stacked in the middle part has four gaps 21 in the vertical direction. Since they are connected by the connecting magnetic pole parts 22 and 23 formed by 19d and 19e, a laminated magnetic pole core part 24 that is assembled integrally within the blank die is formed.

As shown in FIG. 2(D), the strip 15 from which the magnetic pole pieces 19a to 19e are punched is
As shown in FIG. 2(E), it is punched out by a puncher 25 to form a yoke core piece. The yoke core pieces are sequentially laminated and polymerized to form a laminated yoke core portion 26 as shown in FIG. 3(B). Mounting grooves 27 are formed in this laminated yoke core portion 26 in correspondence to the number of magnetic poles.
The mounting groove 27 is, for example, a medium-widening dovetail groove, as shown in FIG.
The outer portions 28 of the laminated magnetic pole core portion 24 shown in (A) can be press-fitted from the axial direction. In addition,
FIG. 3(C) shows a laminated core 29 for a stator of a motor in which these components are assembled, but the windings inserted in the state shown in FIG. 3(A) are not shown.

In the above embodiment, the number of magnetic poles was 12 and the number of divided groups was four groups, but the present invention is not limited to the number of magnetic poles, and is not limited by the number of divided groups. In addition, when the position of the caulking protrusion of the magnetic pole core pieces to be laminated and superposed is slightly shifted, and the main part is provided between the upper and lower connecting magnetic pole parts, the gap (skew) formed by the adjacent magnetic pole core pieces is slightly slanted. The present invention is also applicable.

[0011]

Effects of the Invention As is clear from the above description, the laminated core for a stator of an electric motor according to claim 1 has a laminated magnetic pole core portion in which the upper and lower connecting magnetic pole portions are connected and integrated. Since the coil can be attached to the iron core without the need for a special jig, the equipment can be simplified and work efficiency can be improved. In addition, since magnetic pole core pieces of the same shape can be used for the main part and the connecting magnetic pole parts arranged above and below the main part, the press process is reduced, equipment costs are reduced, and the assembly can be automated. It's easy.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a manufacturing process of a laminated core for a stator of an electric motor according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is a perspective view of a laminated core for a stator of an electric motor according to a conventional example.

[Explanation of symbols] 15 Strip 16 Puncher 17 Gap 18 Parting line 19a Magnetic pole core piece 19b Magnetic pole core piece 19c Magnetic pole core piece 19d Magnetic pole core piece 19e Magnetic pole core piece 20 Main part 21 Gap 22 Connecting magnetic pole part 23 Connecting magnetic pole part 24 Laminated magnetic pole core part 25 Puncher 26 Laminated yoke core part 27 Mounting groove 28 Outside part 29 Laminated core for electric motor stator

Claims (1)

[Claims] Claim 1: A laminated yoke core portion formed by sequentially laminating yoke core pieces having a large number of mounting grooves on the inside with caulking protrusions, and a plurality of divided tooth-shaped magnetic poles, each group a laminated magnetic pole core part in which magnetic pole core pieces in which adjacent magnetic poles are partially connected are sequentially laminated and superposed with caulking protrusions, and the outer side of the magnetic pole is mounted in the mounting groove, the laminated magnetic pole core part comprises a main part in which the magnetic pole core pieces are sequentially laminated and have gaps between each group, and connected magnetic pole parts fixed above and below the main part and rolled and joined with the gaps shifted in phase in the circumferential direction. A laminated core for a stator of an electric motor, which is characterized by: