JPH03284144A - Manufacture of motor stator - Google Patents

Abstract

PURPOSE:To facilitate the process of insulation treatment, winding installation, etc., by integrally striking the members for coupling a tooth iron core with a rotor iron core, etc., and molding an iron core holding part while it is in this shape. CONSTITUTION:Tooth iron cores 1 are positioned radially outside a rotor iron core 2, and those are ones which are struck, and further plural sheets of combinations of tooth ion cores 1 and rotor iron cores 2 are laminated. Among them, small sheets of rotor iron cores 2 communicate with tooth iron cores 1. In this condition, those are laminated, and then a cylindrical iron core holding part is molded with resin on the side of the inner circumference of the tooth iron core 1, whereby the shape is maintained securely. Subsequently, the coupled rotor iron core 2 is struck to enter the next process. Since the iron core holding part 3 is molded with resin while it is in the condition that small sheets of rotor iron cores 2 and tooth iron cores 1 are coupled, each tooth iron core 1 does not break up.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a stator for a small electric motor used in electric fans, ventilation fans, and the like.

BACKGROUND OF THE INVENTION In recent years, there has been a need to streamline a series of manufacturing processes such as insulation treatment and winding conductor wrapping when manufacturing stators for small electric motors.

The conventional manufacturing method of this type of electric motor stator is as follows:
As shown in FIGS. 0 to 12, in order to hold the tooth core 1.01 so that it does not fall apart, a plurality of connected tooth cores 103 are provided with bridging portions 102 on both sides of the tooth core 101 divided into 16 parts. The plurality of connecting teeth iron cores 103 are stacked in a staggered manner so that the positions of the non-bridging portions 104 do not overlap. After applying appropriate insulation treatment to this laminated tooth core, the slot 1
A winding conductor (not shown) is wound around the yoke part iron core 10.
6 was press-fitted.

Problems to be Solved by the Invention In such a conventional configuration, since the connecting tooth core 103 has a bridging portion 102, the magnetic flux generated by the winding conductor leaks through the bridging portion 102, causing vibrations of the motor. Or it was the main cause of abnormal noise. Also, this bridge section 10
If the toothed core 101 is configured only without the toothed core 101, the toothed core will fall apart, making the manufacturing process difficult until it is press-fitted into the yoke core 106.

The present invention solves the above problems, eliminates the bridging portion of the toothed core, and also facilitates a series of manufacturing processes such as insulation treatment and winding of the two-winding conductor after lamination of the toothed core. The object of the present invention is to provide a method for manufacturing a motor stator.

Means for Solving the Problems In order to achieve the above object, the present invention has a first means that includes a ring-shaped yoke core, a toothed core press-fitted to the inner diameter side of the yoke core, and a rotatable core. Consists of connecting members such as child cores,
In the stacking stage of these cores, the toothed core and a small number of connecting members are punched out together, and a cylindrical core holding part is resin-molded near the inner periphery of the toothed core while maintaining this shape. It is constructed by punching out the connecting member.

The second means is such that the toothed core and a small number of connecting members are punched out in a half-blanked state.

The third means is such that a toothed core and a small number of connecting members are punched out with a connecting portion having a narrower connecting width for one of the toothed cores.

Effect: Due to the configuration of the first means, second means, and third means, the shape of the laminated tooth core is maintained by a small number of connecting members, and the core is held near the inner periphery of the tooth core. Since the part is molded with resin, the shape of the tooth core can be reliably maintained until the core is press-fitted into the yoke part.

By punching out the connecting member after molding the core holding portion with resin, it is possible to facilitate a series of manufacturing processes such as insulating treatment and winding the two-winding conductor.

EXAMPLE Hereinafter, a first example of the present invention will be described based on FIGS. 1 to 6. As shown in the figure, the tooth core 1 is positioned radially around the outer periphery of the rotor core 2, and is punched out and laminated at the same time. A small number of the rotor cores 2 are in communication with the toothed core 1, and a cylindrical core holding part 3 is resin-molded on the inner circumferential side of the laminated toothed core 1 to ensure that the shape is maintained. There is.

The rotor core 2 connected to the toothed core 1 is punched out after resin molding, the toothed core 1 is subjected to appropriate insulation treatment, and a winding conductor (not shown) is wound around the slot 4 to form a ring. It is assembled so as to be press-fitted into the yoke core 5 having a shape.

With the above configuration, the core holding part 3 is molded with resin while a small number of rotor cores 2 and tooth cores 1 are connected, so each tooth core 1 does not fall apart, and the connected rotation It is possible to punch out the child core 2 and move on to the next process.

Next, a second embodiment of the present invention will be described based on FIG. Note that the same parts as in the first embodiment are given the same symbols, and detailed explanation thereof will be omitted. In the figure, a small number of rotor cores 2a and a tooth core 1 are connected by a half-opened portion 6.

With the above configuration, the connection of the rotor core 2a after the molding of the core holding part 3 is facilitated by punching because of the half punched part 6, and there is no need to concentrate on the core holding part 3 made of resin.

Next, a third embodiment of the present invention will be described based on FIGS. 8 and 9. Note that the same parts as in the first embodiment are given the same symbols, and detailed explanation thereof will be omitted. In the figure, a connecting portion 7 is provided by reducing the connecting width of a small number of rotor cores 2b and a seven-tooth core 1.

With the above configuration, the core holding portion 3 is similar to the second embodiment.
Since the rotor core 2b after molding has a small connecting width of the connecting portion 7, it is easy to punch out, and there is no need to concentrate on the core holding portion 3 made of resin.

In the embodiment, the rotor core is used as a connecting member for connecting separate tooth cores, but any member may be used as long as it can connect the tooth cores so that they do not come apart.

Effects of the Invention As is clear from the above embodiments, according to the present invention, connecting members such as the tooth core and the rotor core are integrally punched out, and the core holding portion is molded in that shape. Processes such as insulation treatment, winding of two windings, press-fitting of the iron core to the yoke can be carried out smoothly without the iron core falling apart. Furthermore, since the toothed core does not have a bridging portion, there is no leakage of magnetic flux between the toothed cores, and it is possible to assemble a high-performance electric motor that does not generate motor vibration or abnormal noise.

In addition, by connecting the toothed core and the connecting member in a half-blanked shape or with a small connection width, it is possible to assemble a highly reliable electric motor that does not apply excessive force to the resin core holding part when punching out the connecting member. It is possible to provide a method for manufacturing a motor stator that is effective.

[Brief explanation of drawings]

Fig. 1 is a plan view of the toothed portion and rotor core integrated in the first embodiment of the present invention, Fig. 2 is a laminated cross-sectional view of the toothed portion and rotor core, and Fig. 3 is the same toothed portion and rotor core. Enlarged cross-sectional view of the main parts of the laminate, No. 4
The figure is a perspective view of the toothed core after molding with the same resin, FIG. 5 is a sectional view of the toothed core after molding with the same resin, FIG. 6 is a plan view of the same yoke core, and FIG. FIG. 8 is an enlarged cross-sectional view of the essential parts showing the tooth portion of the embodiment and the half-extracted state of the rotor core.
FIG. 9 is a plan view of the tooth portion and rotor core having the connecting portion of the embodiment; FIG. 9 is a plan view of the essential parts of the tooth portion and rotor core having the connecting portion; FIG. 10 is a plan view of the conventional tooth core. , FIG. 11 is a laminated sectional view of the toothed core, and FIG. 12 is a plan view of the yoke core. 1...Tooth core, 2.2a, 2b...
Rotor core, 3... Core holding part, 5...
・Yoke part iron core, 6...Half-opened part, 7...
...Connection part.

Claims (3)

[Claims] (1) Consists of a ring-shaped yoke core and connecting members such as a toothed core and a rotor core that are press-fitted into the inner diameter of the yoke core. A small number of connecting members are punched out together, a cylindrical core holding part is resin molded near the inner periphery of the toothed core in this shape, and then a small number of connecting members are punched out. Production method. (2) The method of manufacturing a motor stator according to claim 1, wherein the toothed core and the small number of connecting members are punched out in a half-blank state. (3) Manufacturing a motor stator according to claim 1, wherein the toothed core and a small number of connecting members are punched out with a connecting portion having a narrower connecting width for one of the toothed cores. Method.