JPS6066638A - Small-sized motor - Google Patents

Abstract

PURPOSE:To rationalize a winding work and to reduce the thickness of a small- sized motor by inserting a stator winding and the connecting portion of leads into a lead bushing, fixing and insulating them. CONSTITUTION:The ends of a stator core 2 and the interior of the slot are insulated with insulating paper 7. A connecting portion 8 of a stator winding 3 and lead wirings 1 is contained in the butting surfaces of in lead bushings 6a, 6b integrated with electrically insulating resin, and irregular portions 9a, 9b for isolating between the connecting portions 8 are provided. Notches 10a, 10b for fixing the bushings 6a, 6b are respectively formed at the cup-shaped brackets 5a, 5b. This is assembled by containing the lead wirings 1 and the connecting portions 8 in the irregular portions 9a, 9b of the bushings 6a, 6b to engage the bushings 6a, 6b to fix the wirings 1, and the notch 9 of the core 2 is engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to insulating the connection between the stator winding and the Hiji wire of a small motor used as a fan drive source, etc., and fixing the Hiji wire. It is.

Structure of a conventional example and its problems FIG. 1 is a sectional view of a conventional small electric motor, and FIG. 2 is a perspective view of a completed stator product. The relationship between the stator winding, the Hiji wire, and the bracket according to the conventional example is as shown in the figure. The connection is made using the method described above, and after covering the connection part with the insulating sleeve 4, it is tied and fixed to the end (coil end) 3a of the stator winding 3. The outlet m1 fixed in this manner is drawn out of the motor through a hole in the sun-dried bushing 6 attached to the bracket 6. Note that 7 is an edge insulating paper.

However, with this method, it is unavoidable that the coil end dimensions increase in the outer diameter or height direction by the amount that the connection part is tied down. This was a major obstacle. This is because, in order to make a small electric motor thinner, the coil end height l should be made smaller as a means to do so without changing the outer diameter or stacking thickness of the stator core 2. most effective.

Normally, in order to reduce the coil end height l, a method of compression molding the coil end 3a is adopted, but if the connection part is fixed to the coil end 3a as before, only that part will be filled with the fill end 3d. As the stator winding 3 was compressed more than other parts, quality defects such as disconnections and layer shorts in the stator winding 3 could not be avoided.

Also, Kuchie IVlli! When the number of wires 1 becomes four or more, the coil end dimensions of the Hiji wire connection part become high, which is one of the disadvantages of making the motor thinner. In addition, because the Hiji n-product 1 had to be tied to the coil end of the stator winding 3 within a low coil end dimension, the number of manufacturing steps in the winding process increased.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawback f of the prior art, reduce the coil end dimensions of the stator winding, and reduce the thickness of a small electric motor.

Structure of the Invention The present invention provides a stator core having a notch on its outer circumference, a stator winding wound around the stator core, a bowl-shaped bracket, and a stator core rotatably supported by the bracket. Inserting a connection part between the stator winding and the Hiji wire into a Hijibutsushiko that is equipped with a rotor and inserted and fitted into the notch of the stator core, and fixing the Hiji wire and the connection part, It is insulated. In addition, Hiji bushings are constructed by integrally molding a thermoplastic resin with electrical insulation properties and a thermosetting resin, and are divided into two parts, each of which has a connecting part between the stator winding and the Hiji wire. There are concave and convex portions for housing and isolating the connecting parts from each other, and the assembly and fixation of the sunrise bushing and fixation to the stator are carried out by sandwiching the bushing with two granular plackets.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. Note that functional parts that are the same as those in the above-mentioned conventional configuration will be described using the same numbers.

2 is a stator core provided with a notch 9; 7 is insulating paper for insulating the end face of the stator core 2 and the inside of the slot; 6a and eb are thermoplastic or thermal This Hiji Bushi 6a is a Hiji Bushi that is integrally molded from hardening resin.

6b accommodates the connecting portion 8 between the stator winding 3 and the Hiji wire 1 on each mating surface, and has a concave-convex portion 9 that isolates the connecting portions 8 from each other.
a and 9b are provided. bowl-shaped bracket tsa,
5blc is Kuchide Pushshi, 6a.

Notches 10a and 10b are provided for fixing 6b.

To assemble the above components, the Hiji wire 1 and the connecting part 8 are housed in the concave and convex portions 9a or 9b of the Hiji bush, and then the Hiji bush 6 is assembled.
a and 6b were fitted to fix the Hiji wire 1, and the insulating paper 7 was attached to both end faces of these (the insulating paper on one side is not shown).
Insert and fit into the notch 9 of the stator core 2. Stator core 2
Insert and fit the brackets 5a and 5b into the notch 10b of the bracket 6b and the notch 1 of the bracket 5a.
At 0a, the sunrise bushings 6a and 6b are assembled and fixed to the stator core 2. Figures 4 and 5 show diagrams of the completed assembly of the above configuration.

Effect of the invention With the above configuration, the following effects can be obtained compared to the conventional example.

(1) There is no need to cover the connecting part between the Hiji wire and the stator winding with an insulating sleeve, and there is no need to tie the connecting part and the Hiji wire to the coil end of the stator winding. This streamlines line work.

(2) In order to make the motor thinner, when compression molding the coil ends of the stator windings to a lower profile, conventional defects such as short-circuits and disconnections in the stator winding layers occur at the connection between the Hide wire and the stator winding layers. However, according to the present invention, even if the Hide wire and the stator winding are connected after compression molding of the coil end, the coil end is still low. Therefore, the stator winding layer show 1.
Defects such as wire breakage are reduced, improving the quality of winding work.

(3) Since the Hiji wire is not tied to the coil end of the stator winding, the coil end stiffness can be reduced and the electric motor can be made thinner.

As described above, according to the present invention, it is possible to reduce the winding work and contribute to making the motor thinner. Furthermore, it is possible to provide a small electric motor that is stable in quality and inexpensive in cost, and has great effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional electric motor, FIG. 2 is a perspective view showing an assembled state of a stator of a conventional example, FIG. 3 is an exploded perspective view showing an assembled state of an embodiment of the present invention, and FIG. The figure is a partial sectional view showing an assembled state of a stator according to an embodiment of the present invention, and FIG. 5 is a sectional view of an electric motor according to an embodiment of the present invention. 1... Lead wire, 2... Stator core, 3...
...Stator winding, 5a, 5b...Bracket, 6a, 6b...Output bush, 8...
... Connection part, 9 ... Stator core notch, 10a
, 10b...Bracket notch. Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 0) a stator core having a notch on its outer periphery, a stator winding wound around the stator core, a bowl-shaped bracket supporting the stator core; A rotor rotatably supported by a placket is provided, and a blind bushing is inserted and fitted into the notch, and a connecting part between the stator winding and the blind wire is inserted into the blind bushing K, A small electric motor in which the Hiji wire and the connection part are fixed and insulated. (2) The opening bushing is integrally molded from a thermoplastic or thermosetting resin having electrical insulation properties, and is divided into two parts, and each divided surface of the opening bushing includes:
2. A small electric motor according to claim 1, wherein a concave-convex portion is provided to house the connection portion between the stator winding and the Hiji wire and isolate the connection portions from each other. (The small electric motor according to claim 1, wherein the divided Hide bush is held between two bowl-shaped brackets.