JPH03235647A - Armature for motor - Google Patents

Abstract

PURPOSE:To simplify the shaping work of wire, after a commutator is pressure inserted again, by providing an end insulator on the commutator side of armature, into which the commutator is pressure inserted again, with a plurality of protrusions arranged annularly with predetermined intervals and a continuous annular protrusion arranged on the outside thereof. CONSTITUTION:A shaft 1 is pressure inserted into an armature core 2 comprising laminated electric steel plates, and a coil 3 is wound by means of a wave winder. In the armature, a plurality of protrusions 5a are arranged annularly with predetermined intervals on an end insulator 5 at the outside of a commutator 6 superposed on the armature core 2, while furthermore an annular continuous protrusion 5b is provided at the outside of the protrusion 5a. Consequently, when the commutator 6 is pressure inserted again, the wire between the commutator 6 and the coil 3 is supported by the protrusions 5a, 5b arranged on the end insulator 5 thus preventing lateral spreading and sagging of the wire.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an armature of a commutator motor used in home appliances.

(Prior Art) In recent years, home appliances have become lighter, thinner, and smaller, and the demand for thin electric motors is rapidly increasing.

Hereinafter, an armature of a conventional thin electric motor will be described with reference to the drawings.

In order to make the motor thinner, it is necessary to reduce the distance between the armature and the commutator. Therefore, a wave winding connection is used to freely use the area near the center of the armature core. FIG. 4 shows a cross section of the armature assembly, with the left sectional view being before the commutator is press-fitted again, and the right sectional view being after the commutator is being press-fitted again. 1
is a shaft, and 2 is an armature core made of stacked electrical steel plates, which is press-fitted and fixed to the shaft 1. 3 is an armature winding (hereinafter referred to as a coil), which is wound by wave winding. ,4゜5
are end insulators A and B that insulate the armature core 2 and the coil 3. A commutator 6 is fixed by being press-fitted into the shaft 1 again and connected to the coil 3. Fifth
The figure is a view of the armature after the commutator is press-fitted again, viewed from the commutator direction.

The assembly of the armature assembly constructed as above will be described below. First, the armature core 2 is press-fitted onto the shaft 1, and the end insulator A4. B5 are press-fitted and fixed to the shaft 1, respectively.

Next, the commutator 6 is temporarily press-fitted onto the shaft 1, slot insulating paper is inserted into the slot of the armature core 2, and wires are connected to each coil which has been wound by wave winding. Thereafter, the commutator 6 is press-fitted again.

(Problem to be Solved by the Invention) However, in the above configuration, when the commutator 6 is press-fitted again, as seen in the right sectional view of FIG. There will be slack and the slack line will have to be reshaped after re-press fitting. Further, as shown in FIG. 5, there is a problem in that the wires wound around the commutator hook portion 6a spread laterally due to the re-pressing of the commutator, making it impossible to maintain an insulating distance between adjacent coils.

In view of the above-mentioned problems of the conventional example, the present invention prevents the connecting wire from sagging between the coil and the commutator even when the commutator is re-press-fitted, and further prevents the wires wound around the commutator hook portion from becoming slack. It is an object of the present invention to provide an armature for a motor which is prevented from spreading in the lateral direction by press-fitting and which simplifies the work of shaping wires after re-press-fitting.

(Means for Solving the Problems) In order to solve the above problems, the armature of the present invention has a predetermined area on the outside of the part where the commutator of the end insulator on the commutator side stacked on the armature core. The structure includes a plurality of protrusions arranged annularly at intervals. moreover,
A continuous annular projection is provided on the outside of the projection.

(Function) According to the above configuration, when the commutator is press-fitted again, the wire between the commutator and the coil is supported by the protrusion provided on the end insulator, preventing it from spreading in the lateral direction and preventing it from sagging. This also prevents the generation of wires, and simplifies the wire shaping work that is conventionally required after press-fitting the commutator.

(Example) Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 shows an armature assembly according to an embodiment of the present invention, with the left sectional view showing the armature assembly before the commutator is re-press-fitted, and the right-hand sectional view showing the armature assembly after the commutator is re-press-fitting.

1 is the shaft, 2 is the armature core made of stacked electrical steel plates, 5 shafts 1
It is press-fitted and fixed. 3 is a coil that has been wound by wave winding. 4 and 5 are end insulators A and B that insulate the armature core 2 and the coil 3.

A commutator 6 is fixed by being press-fitted into the shaft 1 again and connected to the coil 3.

Here, the feature of this embodiment is that the end insulator BS on the commutator 6 side, which overlaps the armature core 2, is provided with protrusions 5a and 5b as shown in FIG. That is, as shown in FIG. 2, the end insulator B5
The same number of protrusions 5 as commutator pieces are arranged in an annular manner at predetermined intervals so as to be located between the hook parts 6a, 6a of the commutator 6, respectively, on the outside of the part where the commutator 6 is located.
a, and a continuous annular protrusion 5b disposed further outside of the annularly disposed protrusion 5a.

The operation of this embodiment configured as described above will be explained below. First, the armature core 2 is press-fitted onto the shaft 1,
End insulator A4, protrusion 5 a g 5 a
end insulators B5 each having a
It is press-fitted and identified. Next, the commutator 6 is temporarily press-fitted into the shaft 1,
Insert slot insulation paper into the slot of armature core 2,
It is connected to each coil that has been wound by wave winding. Thereafter, the commutator 6 is press-fitted again, but at this time, as shown in the right sectional view of FIG. 1, the wire between the commutator 6 and the coil 3 is supported by the continuous annular projection 5b of the end insulator B5. , the occurrence of sagging is prevented. Furthermore, the second
As shown in the figure, the spread of the winding wire of the commutator hook portion 6a in the lateral direction is suppressed by the protrusion 5a of the end insulator B5, and the insulation distance between adjacent coils can be maintained.

(Effects of the Invention) As explained above, according to the present invention, the end insulator on the commutator side of the armature into which the commutator is re-press-fitted has a plurality of protrusions arranged annularly at predetermined intervals, and By providing a continuous annular protrusion disposed on the outside, it is possible to allow the wire to run between the commutator and the coil without slack, and to maintain the insulation distance between adjacent coils.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an armature assembly according to an embodiment of the present invention;
FIG. 2 is a partial plan view of the armature assembly, FIG. 3 is a perspective view of the commutator end insulator, and FIG. 4 is a partial plan view of the armature assembly.
FIG. 5 is a cross-sectional view of a conventional armature assembly, and FIG. 5 is a partial plan view of the armature assembly. 1...shaft, 2...armature core, 3...
Coil, 4... End insulator A,
5...End insulator B. 5a...Protrusions arranged annularly at predetermined intervals;
5b... Continuous annular projection, 6... Commutator,
6a... Commutator hook part.

Claims (1)

[Claims] (1) The end insulator on the commutator side stacked on the armature core is placed on the outside of the commutator in a predetermined manner so that it is located between the hook portions of the commutator to which the armature winding is connected. An armature for an electric motor, characterized in that a plurality of protrusions are arranged annularly at intervals of . (2) In claim (1), a continuous annular protrusion is further disposed between the protrusions arranged annularly at predetermined intervals and the armature winding processed by wave winding. An electric motor armature characterized by: