JPS61293136A - Motor stator and its manufacture - Google Patents

Abstract

PURPOSE:To improve the precision of dimension, by laminating adjacent steel sheets without metal processing such as calking and the like, and by filling up penetrated slots which are arranged at the both upper and lower ends of the steel sheets and on the outer and inner peripheries and in the axial direction, integrally with resin. CONSTITUTION:In a metallic mold 3 for molding with resin, a center retaining pin 4 and a guide pin 5 for regulating a position for inserting a laminated core are arranged. In the mold 3, the rapped steel sheets of a desired quantity are inserted, and resin is injected, and a resin-insulating section 6 and a resin- bonding section 7 are formed, and after the resin is hardened, the laminated core 1 is taken out of the metallic mold 3. As a result, the precision of dimension can be improved, and a space between a stator and a rotor confronting with each other is uniformly arranged in the minimum size, and the performance of a motor can be improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a motor stator using a laminated core.

2. Description of the Related Art As shown in FIG. 4, a conventional motor stator of this type has a structure in which adjacent steel plates of a laminated core 1 are fixed to each other by half-blanked dowels 2.

Problems to be Solved by the Invention However, with this configuration, the half-open dowel convex portion 2a
When the half-blank dowel recess 2b is fitted together by caulking, there is a slight relative misalignment with each other, so as the number of laminated sheets increases, the misalignment accumulates, causing a large dimensional error in the entire laminated core and reducing motor performance. there were.

In other words, when the half-pull dowel convex part 2a is press-fitted into the half-pull dowel concave part 2b, the half-pull dowel convex part 2a is not tilted or deformed as a perfect circle, so that the space between the adjacent steel plates 37 and - in the radial and rotational directions is A relative deviation occurs.

If a large error occurs in the circularity and coaxiality of the inner diameter, outer diameter, and coaxiality of the laminated core 1, the gap between the stator and rotor must be set large, leading to a decrease in performance such as rotational torque. It is something.

Therefore, the present invention aims to prevent relative displacement of adjacent steel plates of the laminated core 1 and improve motor performance.

Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is to fix the laminated steel plates only with resin parts molded around the laminated steel plates and in the through holes.

For production The effect of this technical means is as follows.

In other words, the stacked laminated iron cores are inserted and positioned in a resin mold, and each steel plate is fixed to each other by integral molding of resin, but the relative position of adjacent steel plates is determined by the guide clearance of the guide bin. The dimensional accuracy of the stator is improved.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIG. 2, 3 is a resin molding die. A center holding pin 4 and a guide pin 5 for regulating the insertion position of the laminated core are arranged in the mold 3. 6 is a resin insulating part, 7 is a resin fixing part, and 8 and 9 are ejector turbines.

When the laminated core 1 is inserted into the mold 3, the center holding bin 4
The insertion position is regulated by the guide pin 5 and the relative displacement of adjacent steel plates is ensured within the guide clearance. When the mold closure is completed, the position of the laminated core 1 is completely determined, and when the resin insulation part 6 and the resin fixing part 7 are integrally formed, the steel plates of the laminated core 1 are firmly fixed to each other.

Next, other embodiments of the present invention will be described. FIG. 3 shows another embodiment, in which the resin insulation part 6
By extending the resin to the outer periphery of the laminated core 1 and surrounding the laminated core 1 with resin, the adhesive strength of the resin is improved. Note that 6, 7 and 10 shown in FIG. 1 are windings.

In addition to the effects of the invention, the present invention has a laminated core of the stator that is firmly fixed only by integral molding of resin, so the dimensional accuracy of the laminated core is improved, and the facing gap between the stator and rotor is uniform and minimized. It is possible to improve motor performance because it can be set to
Moreover, the following effects are also produced.

That is, in the present invention, it is possible to integrally mold the resin insulating layer of the winding part at the same time as the resin fixing part, so the insulating layer can be made thinner and in close contact with the laminated core compared to a method that incorporates an insulating member. A stronger magnetic field can be obtained, and the stator can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a motor stator according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a resin molding die for the stator.
FIG. 3 is a sectional view of a main part of a motor stator according to another embodiment of the present invention, FIG. 4a is a sectional view of a main part of a conventional motor stator, and FIG. be. 1... Laminated iron core, 2... Half punched dowel caulking part, 7... Resin fixed part. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Zukyujunnawatezu' special opening a61-293136 (3) To-sho left U [Bebedan\-)'

Claims (4)

[Claims] (1) A laminated core in which adjacent steel plates are not fixed to each other by metal processing such as caulking, resin parts arranged at the upper and lower ends of the laminated core, and through holes in the inner, outer periphery, and axial direction of the laminated core. and a resin fixing part that connects the resin parts at the upper and lower ends of the laminated core. (2) The motor stator according to claim 1, wherein a resin insulating member is integrally molded on the inner peripheral portion of the laminated core. (3) The motor stator according to claim 1, wherein a resin insulating member is integrally molded on the outer periphery of the laminated core. (4) After manufacturing a laminated iron core without adhering adjacent steel plates to each other by metal processing such as caulking, inserting the laminated iron core into a resin molding mold, and positioning the adjacent steel plates,
A motor stator in which resin parts are molded on the upper and lower ends of the laminated core, and at the same time, resin fixing parts are molded to connect the resin parts on the upper and lower ends of the laminated core to through holes in the inner, outer periphery, and axial direction of the laminated core. Production method.