JPH1127907A - Manufacture of commutator motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a commutator motor, wherein an end of a hook section can be firmly fastened to a brush slide section of a commutator without increasing the number of components and which can maintain high reliability in the electric connection between a small piece of the commutator and an armature winding, even during a high-speed rotation. SOLUTION: A hook section 3 of a commutator and an armature winding 4 wound around the hook section 3 are welded by heating with electricity to connect the armature winding 4 to the hook section 3. After that, the hook section 3 is applied with high-frequency vibration. In order to make the outer diameter of a small piece of a hook wire connecting section 9 to which the armature winding 4 is to be connected smaller than that of a brush slide section 8, a small stage is formed between the brush slide section 8 and the hook wire connecting section 9. After that, the hook section 3 is welded through heating with electricity. By this method, only the end of the hook section 3 can be welded at the same level as the brush slide section 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a commutator motor used for a vacuum cleaner, a power tool, and the like.

[0002]

2. Description of the Related Art In recent years, there has been a remarkable trend for miniaturization and high efficiency of electric appliances such as vacuum cleaners, and in order to cope with this, there is a strong demand for miniaturization and high efficiency of electric motors. . In particular, in the case of vacuum cleaners, high-speed rotation of electric motors for the purpose of increasing efficiency has been progressing, and motors have become smaller commutator diameters to withstand high-speed rotation and thicker windings to reduce copper loss. It has been demanded.

A conventional commutator motor for a vacuum cleaner will be described below. FIG. 5 is a half sectional view of a commutator motor of a conventional vacuum cleaner. In FIG. 5, 10 is an armature, 1 is a commutator, and 4 is an armature winding. Commutator 1
Is provided with a plurality of commutator pieces 2 on the outer circumference, and has a hook portion 3 at one end of the commutator pieces 2 for connecting the armature winding 4. The brush holder 11 accommodates a carbon brush 12, and the tip of the carbon brush 12 is configured to be in slidable contact with the commutator 1.

In this commutator motor, the armature winding 4
Is wound around the hook portion 3 of the commutator 1 and is fixed by electric heating. Thus, the armature winding 4 and the commutator 1 are electrically connected.

[0005]

However, in the above configuration, when the armature winding and the commutator are connected to each other, the hook is deformed by energizing and heating. There was a problem that the joining force between the brush sliding portion of the child and the same surface was in a weak state, and the joining at the tip of the hook portion was disconnected due to the centrifugal force during high-speed rotation. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a commutator motor that can more reliably establish an electrical connection between an armature winding and a hook type commutator.

[0006]

SUMMARY OF THE INVENTION In order to achieve this object, a commutator motor according to the present invention is provided with a welding process by electric heating for connecting a hook portion of a commutator and an armature winding wound around the hook portion. After applying, high frequency vibration is applied to the hook portion. Also, a small step between the brush sliding portion and the hook connection portion is set so that the outer diameter of the hook piece to which the armature winding is connected is smaller than the outer diameter of the sliding portion hit by the carbon brush. , And the hook portion is subjected to a welding process by electric heating so that only the hook tip is welded to the same surface as the diameter of the brush sliding portion.

According to the present invention, a high-frequency vibration is applied to the hook portion after the welding process is performed by energizing heating to connect the hook portion and the armature winding, so that the tip of the hook portion is firmly attached to the commutator piece. Welded to.

In addition, by providing a small step between the brush sliding portion of the commutator and the hook connection portion, the hook portion can be pressurized without breaking the armature winding, and the conditions for energization and heating are reduced. Since it can be adjusted freely, the tip of the hook can be firmly welded to the commutator piece.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to a mold commutator in which a plurality of commutator pieces each having a hook portion at one end made of an electric material are arranged in a cylindrical shape, and are integrally formed of synthetic resin. A method for manufacturing a commutator motor including an armature winding connected to a hook portion of the molded commutator, wherein a welding process is performed by applying heat to connect the hook portion and the armature winding. After that, the high frequency vibration is applied to the hook portion, and the tip of the hook portion is securely joined to the same surface as the brush sliding portion, so that the tip of the hook portion does not float due to centrifugal force even at high speed rotation. Has an action.

According to a second aspect of the present invention, the brush sliding portion and the hook connecting portion are so arranged that the outer diameter of the hook portion to which the armature winding is connected is smaller than the outer diameter of the brush sliding portion. The hook portion is welded to the same surface as the diameter of the brush sliding portion by subjecting the hook portion to welding treatment by energizing heating, and the hook portion is heated only by energizing heating. This has the effect that the tip can be securely joined to the same surface as the brush sliding portion.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a commutator integrally formed of a synthetic resin having a plurality of commutator pieces 2 of a conductive material on an outer periphery and a hook portion 3 at one end, and 4 denotes an armature core 5.
And an armature winding end connected to the hook 3 of the commutator 1. As shown in FIG. 2, the commutator piece 2 is brought into contact with an electrode rod 6a for conducting and heating, and the hook part 3 is pressed while energizing the electrode rod 6b to break the coating on the armature winding end 4 and deform. By doing so, an electrical connection is obtained. Thereafter, as shown in FIG. 3, the contact 7 is applied to the hook portion 3 to apply high frequency vibration, whereby the tip of the hook portion 3 is fixed to the surface of the brush sliding portion to which the vibration is not transmitted. At this time, the armature winding end 4 is not welded because it moves together with the vibration of the hook 3.

(Embodiment 2) FIG. 4 shows another embodiment of the present invention. The armature winding end 4 is connected to the outer diameter of the brush sliding portion 8 of the commutator piece 2. The brush sliding portion 8 is so adjusted that the outer diameter of the hook connection portion 9 of the hook portion 3 is reduced.
A slight step is provided between the hook connection portion 9 and the hook connection portion 9.
Is subjected to a welding process by energizing and heating, so that the tip of the hook portion 3 is welded and fixed to the same surface as the brush sliding portion 8 of the commutator piece 2 without breaking the armature winding end 4.

According to the above configuration, the surface of the brush sliding portion 8 of the commutator piece 2 and the tip of the hook portion 3 are firmly welded and fixed, so that a sufficient hook against centrifugal force during high-speed rotation is provided. The holding force of the portion 3 is obtained, and the reliability at the time of high-speed rotation can be improved.

The present invention can be configured in various modes in addition to the embodiments described above. For example, a minute step is provided between the brush sliding portion and the hook connection portion, and the hook portion is subjected to an electric heating process. After that, a stronger holding force of the hook portion may be secured by further applying high frequency vibration.

[0016]

As is apparent from the above description, claim 1
According to the described invention, the hook tip and the armature winding end are welded by energizing heating, and then high-frequency vibration is applied to the hook, so that the hook tip is connected to the brush sliding part without fear of breaking the armature winding end. It can be fixed by welding.

According to the second aspect of the present invention, by providing a minute step between the brush sliding portion and the hook connection portion and welding by energizing and heating, the tip of the hook can be brushed without adding special equipment. It can be welded to moving parts.

As described above, according to the present invention, the holding force of the brush sliding portion and the tip of the hook portion of the commutator can be increased without increasing the number of parts. It is possible to provide a commutator motor that can obtain sufficient reliability even when the electrical connection of the windings is rotating at high speed.

[Brief description of the drawings]

FIG. 1 is a half sectional view of an armature according to a first embodiment of the present invention.

FIG. 2 is a side view showing a state in which an electric heating process is performed on the hook portion.

FIG. 3 is a side view showing a case where high-frequency vibration processing is performed on the hook portion of the second embodiment.

FIG. 4 is a half sectional view of a commutator according to the second embodiment.

FIG. 5 is a half sectional view of a conventional commutator motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commutator 2 Commutator piece 3 Hook part 4 Armature winding 5 Armature iron core 6a, 6b Electrode bar 7 Contact 8 Brush sliding part 9 Hook connection part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuo Nozaki 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A molded commutator comprising a plurality of commutator pieces each having a hook portion at one end made of a conductive material and arranged in a cylindrical shape and integrally formed of synthetic resin, and an electric machine connected to the hook portion of the molded commutator. A method for manufacturing a commutator motor including a slave winding, wherein a high frequency vibration is applied to the hook portion after performing a welding process by energizing heating for connecting the hook portion and the armature winding. A method for manufacturing a commutator motor, comprising: 2. A small step is provided between the brush sliding portion and the hook connection portion so that the outer diameter of the hook portion to which the armature winding is connected is smaller than the outer diameter of the brush sliding portion. 2. The method for manufacturing a commutator motor according to claim 1, wherein a tip of the hook is welded to the same surface as a diameter of the brush sliding portion by performing a welding process by energizing and heating the hook.