JPS62181637A - Motor - Google Patents

Abstract

PURPOSE:To make it possible to assemble a motor easily even if the assembly is performed by a machine, by integrally shaping a bracket with resin to one side of a stator in molding the stator and by assembling the motor with the bracket portion brought underside. CONSTITUTION:In forming a stator 4 by molding the resin with an iron core 1 applying a winding 2, a bracket 3 is integrally formed with resin 3 to one side of a stator 4. In assembling the motor, the bracket 5 is brought to underside, supplying the parts from above. That is, a rotor 8 is housed in the stator 4. Then a bracket 12 is applied to the stator 4 and a screw 11 is thrust into a hole 10, fastening a bracket 12 to the stator 4 to fix. Thus, in the process of assembly it is not necessary to turn over the assembly upside down, so that the motor can easily be assembled not only by handwork but also by machine.

Description

[Detailed description of the invention] "Industrial use valve" The present invention relates to an electric motor that is easy to assemble.

``Prior art'' The electric shaft has a simple structure and is easy to assemble by machine, but since brackets are formed on both sides of the stator in the axial direction,
When installing the rotor, brackets had to be assembled from both sides in the axial direction.

When assembling this bracket, it is convenient to disassemble it when it is fixed with screws, but it is difficult to tighten the brackets on both sides with screws using a machine. This creates a problem in that the machine cannot be used with other models that have different shapes.

For this reason, the final assembly process is often done manually, which has been an obstacle to mechanizing the assembly of electric motors.

Even in manual assembly, the assembled parts had to be turned upside down during the assembly process because assembly parts were provided on both sides.

For this reason, it is not easy to assemble, and even though there are few parts, it takes time to assemble and increases the manufacturing cost.

"Problems to be Solved by the Invention" The present invention has been made in view of the above circumstances, and aims to provide an electric motor having a structure that is easy to assemble and can be mechanized.

``Means for Solving Problems U'' The present invention provides an electric motor in which a stator is formed by winding an iron core and encasing it in resin, and a rotor is provided within the stator. A bearing housing is integrally formed with resin on one axial side of the housing, an axial hole is formed in the iron core on the other side, and the hole is led out to the outside with a mold during molding, a bracket is provided on the other side, and a screw is inserted into the hole. The problem is solved by fitting and fixing.

``Operation'' The bearing housing is integrally molded with resin on one side of the stator and forms a cup shape when viewed from the other side, so when one side is placed down and the other is placed on top, the stator, rotor, and
It can be assembled with the bracket, and the screws that secure the bracket can also be assembled facing downwards.

Therefore, since the assembly is carried out by stacking the parts in sequence, there is no need to invert the assembly during the assembly process, which facilitates mechanization.

``Embodiment'' The present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a longitudinal cross-sectional view showing the structure of the electric motor according to the present invention, and FIG. FIG. 3 is a plan view showing the main parts thereof.

FIG. 3 is a vertical sectional view showing the main parts of a mold for molding with resin.

In FIG. 1, the electric motor has a winding 2 wound around an iron core 1, and a stator 4 formed by molding the entire motor with four pieces and one piece of fat 3.

On one side of the stator 4, three brackets 1 to 5 are integrally formed of resin 3, and a bearing housing 6 is formed on the bracket 5.

Furthermore, a bearing 7 is fitted into the bearing housing 6, and a shaft 9 of a rotor 8 is supported therein.

On the other side of the stator 4, three holes 10 for screws in the axial direction are formed, and three screws 11 are fitted into the holes 10.

The screws 11 fix the bracket 12 on the other side to the stator 4 , and the bracket 12 is formed with an extruded protrusion 13 for positioning with the stator 4 .

Roughly speaking, the bracket 12 is formed with a housing 14 and equipped with a bearing 15 to support the shaft 9.

In FIG. 2, a toothed portion 16 is formed on the inner diameter side of the iron core 1, and the winding 2 is applied to this toothed portion 16.

The hole 10 is formed in the yoke part 17 of the iron core 1.
'3, and are configured so as not to come into contact with the winding 2.

In FIG. 3, the electric motor is provided in a mold 18 for injecting and molding the resin 3, and an upper mold 19 is used to inject the resin 3 into the mold.
A portion is formed where it is filled with.

The pin 20 of the mold 18 is fitted into the hole 10 of the iron core 1, and the pin 20 is set to a depth that allows the screw 11 of the hole 10 to act. M;1 is formed so that the resin 3 penetrates.

In such a configuration, the electric motor is constructed by laminating a certain amount of steel plates in which through holes are previously formed on the other side of the iron core 1, or by drilling holes with a drill after laminating the steel plates to form the holes 10.

Then, the winding 2 is applied, the wire is placed in the mold 18, and the resin 3 is injected and molded.

During molding, the pin 20 of the mold 18 is fitted into the hole 10, so that when the mold 18 is removed, the hole 10 is led out through the resin 3 portion.

In the assembly process of the stator 4 formed in this manner, the rotor 8 is housed with one side on which the brackets 1-5 are formed facing down.

To accommodate the rotor 8, press fit the bearing 7.15 onto the shaft 9 and place it in the assembled state in the stator 4, then attach the bracket 1.
2 is attached to the other side of the stator 4 and tightened with screws 11.

To assemble in this way, the stator 4 is configured in a cup shape, and the rotor 8 and bracket 12 can be assembled in a stacked manner with one side facing down, and the screws 11 can be tightened from above. Since it can be assembled, it is easy to assemble and is convenient for assembly by machine.

That is, since the parts are stacked one after another, parts can be supplied by grooves sequentially from above, and the screws 11 can also be tightened from above.
convenient.

Such a machine can be configured arbitrarily depending on the structure of the electric motor, but it is necessary to carry out the process of moving the stator 4 by placing it on a conveyor etc.
a step of supplying screws 11; and a step of replenishing screws 11.
By sequentially configuring the steps of tightening the screws 11, it can be easily implemented.

Moreover, if the hole 10 of the iron core 1 is made to have a larger inner diameter than the pin 20 of the mold 18, the resin 3 will enter from a direction different from the side of the hole 10 where the bottle 20 is fitted and fill the inner part of the pin 20. When a screw 11 having a larger diameter than the pin 20 is fitted, the screw 11 acts on the resin 3, making it easier to screw in the self-tapping screw.

Of course, the same effect can be obtained by screwing a self-tapping screw into the iron core 1, and the screwing force of the screw 11 is determined by the relationship between the inner diameter of the hole 10 and the outer diameter of the screw 11.

Furthermore, when the screws 11 are applied to the former resin 3, the core 1 and the bracket 12 can be assembled in an insulated state, but when the screws 11 are applied to the multi-layer iron core 1, the iron core 1 and the bracket 12, etc. It becomes electrically connected,
Grounding becomes easy.

"Effects of the Invention" According to the present invention, the stator can be assembled sequentially from above with the stator facing down, and it can be easily assembled by hand or by machine, and the number of man-hours required for assembly is small. This means that it can be manufactured at a low cost.

The effect is extremely large in electric motors that are mass-produced at low cost.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the structure of an electric motor according to the present invention, and FIG. 2 is a plan view showing the main parts thereof. FIG. 3 is a longitudinal cross-sectional view showing the main parts of a mold for molding with resin. 1... Iron core, 2... Winding wire, 3... Resin, 4
... Stator, 5.12... Bracket, 10.
...hole, 11...screw.

Claims (1)

[Claims] The stator is formed by winding the iron core and molding it with resin.
In an electric motor with a rotor inside the stator, a bearing housing is integrally formed with resin on one axial side of the stator, and an axial hole is formed in the iron core on the other side, and a hole is formed outside with a mold during molding. An electric motor is provided with a bracket on the other side, and is fixed by fitting a screw into the hole.