JPH10136603A - Electric motor - Google Patents

Abstract

(57) [Problem] To provide an electric motor capable of easily performing stator fixing work, reducing the number of assembling steps and facilitating automatic assembling. SOLUTION: An outer peripheral annular portion 2 on the opening side and a bearing support portion 3 in the center of the closing portion side are provided on a cylindrical motor frame 1 made of resin, and a fixing hole 6 for fixing the cylindrical motor frame 1 to an outer peripheral plane. A belt-shaped frame 9 having a resiliently pressurizing arm 7 which is provided in the direction toward the stator 10 and which can be slightly deformed, and has a bearing support 8 in the center is provided in the bracket 4, and the cylindrical motor frame 1 and the bracket 4 are provided. Stator 10 fixed between
Winding 1 while covering a part of the surface of the laminated iron core with synthetic resin 11.
2 is performed, and the receiving base 13 of the pressing arm 7 of the bracket 4 is provided on the synthetic resin portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor used for a vacuum cleaner or the like. It is about.

[0002]

2. Description of the Related Art In recent years, electrical equipment has been required to have high efficiency and high output, and there is no need to be small and light. For this reason, electric motors used in electric equipment are also required to be small, light, and highly efficient. In addition, automatic assembly has progressed further,
Motors are also required to reduce the number of parts for automatic assembly.

[0003] A conventional electric motor for a vacuum cleaner will be described below. FIG. 4 is a half sectional view of a conventional electric motor. FIG.
In the figure, reference numeral 1 denotes a cylindrical motor frame having a bearing support 3 in the center and a brush retainer 17 in the periphery thereof, and 18 a bracket having a bearing support 8 in the center. A pair of windings 1 is provided between the cylindrical motor frame 1 and the bracket 18.
And a rotor 14 having a rotating shaft 15 supported by a bearing 19 mounted on the bearing support 3.
Is stored.

In this electric motor, the laminated core of the stator 10 is press-fitted into the cylindrical inner diameter of the cylindrical motor frame, and the cylindrical motor frame 1 is deformed by punching from the outer peripheral surface of the cylindrical motor frame 1 to deform the stator 10. The end face of the iron core is pressurized and fixed.

[0005]

However, in the above-mentioned conventional construction, a punching step for fixing the stator core is required, and the size of the cylindrical portion of the cylindrical motor frame is larger than the size of the stator core lamination. If the connection to the outer peripheral annular portion of the motor frame is made smooth with a large radius of curvature because of the need to increase the size, the overall length of the cylindrical motor frame becomes longer, which hinders the reduction in size and weight of the motor. Had. Accordingly, an object of the present invention is to provide a motor that can reduce the number of assembly steps of the motor, reduce the loss of the internal flow of wind when used as a blower, and can be reduced in size and weight.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a cylindrical motor frame having an outer peripheral annular portion on the opening side, a laminated iron core partially covered with a synthetic resin, and a winding. And a metal bracket having an armature opposed to the stator and a pressure arm capable of minutely deforming the stator, wherein the metal bracket is attached to an outer periphery of the cylindrical motor frame. It is characterized in that the synthetic resin portion of the stator is held by the pressing arm while being fixed to the annular portion.

According to the present invention, the fixing of the stator is ensured by simply fixing the bracket to the cylindrical motor frame by screwing, and simultaneously the pressing arm of the bracket presses the stator end face. The punching process and the screwing process for fixing the stator as in the related art can be reduced, and automatic assembly can be easily performed.

In the present invention, when the connection between the cylindrical portion and the outer peripheral annular portion of the motor frame is formed in a smooth shape having a large radius of curvature, the wind motor can be used without increasing the overall length of the cylindrical motor frame when used as a blower. The loss of the internal flow can be reduced, and a highly efficient electric motor can be provided.

[0009]

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

FIG. 1 is a half sectional view of an electric motor of the present invention, and FIGS. 2 to 3 are a plan view and a side view of a bracket of the present invention. 1 to 3, reference numeral 1 denotes a resin-made cylindrical motor frame having an outer peripheral annular portion 2 on the opening side and a bearing support 3 in the center on the closing portion side;
A bracket having a fixing hole 6 for fixing the cylindrical motor frame 1, a pressing arm 7 for fixing the stator 10, and a bearing support 8 in the center. Reference numeral 10 denotes a stator fixed between the cylindrical motor frame 1 and the bracket 4. The stator 12 is covered with a synthetic resin 11 to cover a part of the surface of the stator laminated iron core, and is wound with a winding 12. The cradle 13 is provided on the synthetic resin portion. Reference numeral 14 denotes an armature that is arranged inside the stator 10 and is held by the cylindrical motor frame 1 and the bearing support of the bracket 4. The armature 14 has a centrifugal fan 16 attached to the tip of the rotating shaft 15.

As shown in FIG. 2, the bracket 4 is provided with a belt-like frame 9 having a bearing support 8 between the fixing holes 6, and a direction toward the stator from the outer peripheral flat portion 5 near the fixing holes 6. The pressurizing arm 7 provided has a refraction shape capable of minute deformation. Bearing support 8 and pressure arm 7
The motors are arranged in such a manner that, after assembly of the electric motor, pressure is applied to each of them to cause slight deformation, but each minute deformation does not affect the other.

According to the above configuration, the stator 10 is fixed by the fixing screw of the bracket 4 without adding a process such as punching after press-fitting into the cylindrical motor frame 1 or fixing the stator 10 by a single screw. It can also be used in the process, making assembly work easier.

The present invention can be configured in various forms other than the above-described embodiment. For example, the end of the pressure arm 7 may be bent to increase the joint surface with the synthetic resin.

[0014]

As described above, according to the present invention, it is possible to provide an electric motor in which the fixing operation of the stator can be easily performed, the number of assembling steps can be reduced, and the automatic assembling can be easily performed.

[Brief description of the drawings]

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

FIG. 2 is a partial plan view of the electric motor according to the embodiment of the present invention.

FIG. 3 is a partial front view of the electric motor according to the embodiment of the present invention.

FIG. 4 is a half sectional view of a conventional electric motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical motor frame 2 Peripheral annular part 4 Metal bracket 6 Fixing hole 7 Pressure arm 10 Stator 11 Synthetic resin 12 Winding 14 Armature

Continued on the front page (72) Inventor Katsutoshi Fujita 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A stator having a cylindrical motor frame having an outer peripheral annular portion on the opening side, a laminated iron core partially covered with a synthetic resin, and a winding, and an electric machine arranged to face the stator. An electric motor comprising: a metal bracket having a pressure arm capable of being slightly deformed, wherein the metal bracket is fixed to an outer peripheral annular portion of the cylindrical motor frame and a stator is synthesized by the pressure arm. An electric motor characterized by holding a resin portion.