JPH0474933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to fixing lead wires of an annular rotating electric machine stator of an electric motor used as a fan drive source of an air conditioner or the like.

Conventional configurations and their problems In recent years, as motors have become smaller, lighter, and safer, there has been a growing demand for thinner motors. A toroidal winding molded electric motor is attracting attention, in which a so-called toroidal winding, in which a winding is wound perpendicularly to the yoke, is applied to a stator core, and then this stator is molded with resin.

Hereinafter, a stator of a toroidal winding molded motor will be described as a conventional example with reference to the drawings.

FIG. 1 shows a cross section of a conventional electric motor stator after resin molding.

After forming an insulating layer 2 with an electrically insulating resin on the surface of the stator core 1, a winding 3 is wound around this core, the terminal 4 of the winding is connected to the lead wire 5, and this connection part 6 is formed.
are insulated by an insulating tube 7. The connected lead wire 5 is led out through the lead wire bush 8. The completed winding product (shown in FIG. 2) constructed in this way is inserted into a mold and integrally molded with resin 9.

During this molding, the lead wires 5 move due to the sealing pressure and flow of the resin 9, and the stator inner diameter section 1
In the past, defects such as 0 and lead wires 5 being exposed on the mold end surface 9a often occurred.

For this reason, as shown in the perspective view of the completed stator winding product in FIG. 11d to tie with thread
Alternatively, the movement of the lead wire 5 has been prevented by using a method such as 12 in which the lead wire is bonded to the end face of the stator using an adhesive.

However, the above method requires many man-hours for winding and increases manufacturing cost. Additionally, the adhesive deteriorates the insulating coating of the winding, leading to a decrease in quality.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention arranges protrusions integrally formed with an insulating layer on the end face of the stator teeth, thereby insulating the end face of the stator core and positioning, guiding, and fixing the lead wires. To provide a stator for a rotating electrical machine that is easy to use, inexpensive, and of high quality.

Structure of the Invention The rotating electric machine stator of the present invention covers both upper and lower end surfaces of a stator core having an annular yoke portion and a tooth portion protruding inwardly from the yoke portion with an electrically insulating resin to form an insulating layer. At the same time, a protrusion for guiding the lead wire, which is integrated with the insulating layer and protrudes in the axial direction on the teeth of the stator, is arranged to position, guide, and guide the lead wire.
It is easy to fix and contributes to improved productivity and stable quality.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a completed winding product of a rotating electric machine stator in one embodiment of the present invention. Reference numeral 13a denotes a protruding part which is a toothed part of the end face of the stator and is integral with the insulating layer of the end face which protrudes in the axial direction, and the lead wire 5 connected to the winding 3 passes through this protruding part and is connected to the lead wire bushing. 8 and is fixed at the same time.

FIG. 4 shows a cross section taken along the arrows A to A in FIG. It was formed by

Two protrusions 13a are arranged, and the interval 14 between the inner surfaces of each protrusion is set smaller than the outer diameter of the lead wire 5, and the protrusions 13a are arranged so as to sandwich and fix the lead wire 5.

Here, the protrusion 13a is positioned at the teeth of the end face of the stator, and the lead wire 5 is inserted and fixed therein. With such a configuration, the connection portion 6 between the end 4 of the winding and the lead wire 5 is formed. is fixed between the teeth against the sealing pressure and flow of the resin 9 during molding, and the axial height of the protrusion 13a is lower than the coil end height of the winding 3. Therefore, the axial thickness of the rotating electrical machine can be substantially reduced.
It has the effect of being able to be made smaller. On the other hand, if the protrusion 13a is provided at a portion other than the teeth on the end face of the stator, the shape of the winding near the protrusion 13a becomes asymmetrical, which not only adversely affects the motor characteristics but also causes the lead wire to cross over the winding. In order to pass through, the height of the protrusion 13a needs to be increased, and as a result, the rotating electrical machine becomes large.

(1) In this example, the insulating layer of the stator core was molded integrally with the stator core, but the insulating layer of the stator core was molded in advance with an electrically insulating resin, and It may be formed in combination with an iron core.

(2) In this embodiment, two protrusions are arranged for each stator tooth, but a plurality of protrusions may be provided, and a plurality of lead wires may be inserted and fixed.

(3) In this embodiment, the protrusions of the stator teeth are arranged at two teeth, but the protrusions of the stator teeth are
They may be arranged on all the teeth of the stator core, or those not necessary may be removed.

(4) In this embodiment, the stator winding form is toroidal winding, but the stator winding form may be regular concentric winding.

(5) In this embodiment, the stator windings were formed by integrally molding and fixing them with resin, but the stator windings may be fixed by varnish treatment.

Effects of the Invention As is clear from the above description, the present invention has advantages in that, in order to fix the lead wires of a stator of a rotating electrical machine, the lead wires are tied together, the lead wires are wound around the iron core, etc. Rather than tying the stator core to the core or fixing it with adhesive, the upper and lower end surfaces of the stator core are covered with electrically insulating resin to form an insulating layer between the stator windings and the core, and the teeth of this insulating layer are A lead wire guiding protrusion integrally formed with the insulating layer is disposed on the end surface of the lead wire and protrudes in the axial direction to facilitate positioning, guiding and fixing of the lead wire. This insulating layer is usually formed by molding, and the increase in manufacturing costs due to the placement of the protrusions is minimal. As a result, the practical effects are significant.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a completed molded product of a rotary electric machine stator according to a conventional example, FIG. 2 is a perspective view of a completed winding product of a rotary electric machine stator according to a conventional example, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a plan view of a completed winding product of a rotary electric machine stator in FIG. DESCRIPTION OF SYMBOLS 1... Stator core, 2... Insulating layer, 3... Winding wire, 4... Winding terminal, 5... Lead wire, 8...
Resin, 13a, 13b... protrusion.

Claims (1)

[Scope of Claims] 1. An insulating layer integrally covering both upper and lower sides of a stator core with an electrically insulating resin, which has an annular yoke portion and a plurality of tooth portions protruding inward from the yoke portion; A protrusion part of the insulating layer on the end face of the tooth part on the lead wire drawer side and protruding in the axial direction is integrally formed during molding of the insulating layer, and a plurality of the protrusions are each arranged on the end face of the predetermined tooth part. At the same time, a stator for a rotating electrical machine, wherein the side wall interval of the plurality of protrusions is set smaller than the outer diameter dimension of the lead wire, and the lead wire is inserted and fixed into the gap between the protrusions. 2. The rotating electric machine stator according to claim 1, wherein the insulating layer is formed by combining an insulator molded with an electrically insulating resin into the stator core.