JPH06141494A - Stator iron core of motor - Google Patents

Abstract

PURPOSE:To provide a stator iron core of a motor low in vibration and low in noise by lightening the vibration and noise of a motor caused by the shortage of the strength of a stator iron core. CONSTITUTION:The strength of a stator iron core 11 increases, as a result, the vibration and noise caused by a motor can be lightened by stacking and fixing iron plates 12, 0.7mm or less in thickness by means of cuts 13, and then, injecting a binder 14 between the laminations and hardening it so as to fix the iron plates each other. Moreover, the strength of the periphery of the iron core increases by fixing the iron plates around the stator iron core 11 directly in contact with, at least, an outer frame 25, as a result, the vibration conducted to the armor frame 25 and the noise can be lightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core of an electric motor.

[0002]

2. Description of the Related Art In recent years, a stator core of an electric motor has been adopted as a fixing method for laminated iron plates because the number of man-hours can be reduced as compared with conventional welding. Is coming.

In order to reduce the size of equipment that uses an electric motor, the stator core of the electric motor uses a method such as press fitting or shrink fitting as in a rotary compressor used for air conditioning and refrigeration equipment. It is becoming mainstream to assemble the iron core with the outer peripheral portion of the iron core directly contacting the outer frame.

A conventional stator core of an electric motor will be described below. FIG. 3 shows a conventional method of fixing a laminated iron plate of a stator core of an electric motor by the Karamase method.
In FIG. 3A, 1 is an iron plate, 2 is a notch protrusion provided in the iron plate 1, and 3 is a notch recess provided in the iron plate 1. The notches are provided at the same time when the iron plate 1 is punched out with a die. When the punched iron plates are stacked, the protrusion 2 fits into the recess 3 of the underlying iron plate as shown in FIG. 3B, so that the stacked iron plates are fixed by the entanglement between the protrusion 2 and the recess 3. It

FIG. 4 shows an assembled state of a conventional stator core into an electric motor. In FIG. 4, 4 is a stator core of the electric motor, and 5 is an exterior frame for fixing the stator core 4. The stator core 4 of the electric motor is fixed by a method such as press fitting or shrink fitting while the outer peripheral portion of the stator core is in direct contact with the exterior frame 5.

[0006]

However, in the above-mentioned conventional structure, since the laminated iron plates are only fixed by the entanglement of the notches, the strength is inferior to the iron core fixed by welding, and as a result, the electric motor However, the vibration and noise generated from the motor are larger than those of the electric motor with the iron core fixed by welding.

As a result of experiments, it has been confirmed that the tendency becomes greater as the thickness of the iron plate becomes thinner, and that if the plate thickness is 0.7 mm or less, some problems may occur in practical use.

Further, when the stator core of the electric motor is in direct contact with the outer frame, vibration and noise generated from the electric motor are directly transmitted to the outside from the stator core through the outer frame. There was a problem that noise must be suppressed especially.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a stator core of a motor with low vibration and low noise.

[0010]

In order to achieve this object, the stator core of the electric motor of the present invention has a structure in which after the iron plates are laminated, an adhesive is injected and cured between the layers to fix the iron plates together. ing. Further, it has a configuration in which at least the iron plates on the outer peripheral portion of the iron core are fixed to each other.

[0011]

With this structure, the strength of the stator core is increased, so that vibration and noise generated from the electric motor can be reduced. In addition, at least the strength of the outer peripheral portion of the iron core that is in contact with the exterior frame is increased, so that vibration and noise transmitted to the exterior frame can be reduced.

[0012]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is a stator core of an electric motor,
12 is an iron plate that constitutes the stator core 11, 13 is an iron plate 12
The notch 14 provided in the is an adhesive. Iron plate 12
After being laminated and fixed by the notches 13, the adhesive 14 is injected between the laminated layers and cured to fix the iron plates together.

The operation of the stator core of the electric motor constructed as above will be described. Vibration and noise generated from the electric motor are caused by the vibration of the iron core, and the magnitude thereof can be reduced as the strength of the iron core increases. Since the iron plates 12 are fixed to each other by the adhesive agent 14 which is injected and cured between the laminated layers, the strength of the stator core 11 is increased,
As a result, vibration and noise generated from the electric motor can be reduced.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 21 is a stator core of the electric motor,
22 is an iron plate that constitutes the stator core 21, 23 is an iron plate 22
Is a notch provided in the ,, 24 is an adhesive, and 25 is an exterior frame for fixing the stator core 21. After the iron plates 22 are laminated and fixed by the notches 23, the adhesive 24 is injected and cured between the laminations of at least the outer peripheral portion of the iron core to fix the iron plates.

The operation of the stator core of the electric motor constructed as above will be described. Vibration and noise generated from the electric motor are transmitted from the stator core 21 to the outside through the exterior frame 25. However, since the iron plates on the outer periphery of the stator core 21 that come into contact with the exterior frame 25 are fixed by the adhesive 24, the outer periphery of the core. Is increased, and as a result, vibration and noise transmitted to the exterior frame 25 can be reduced.

[0018]

As described above, according to the present invention, the plate thickness is 0.7 mm.
In the stator core of an electric motor, which is assembled using the following iron plates, in which the notches provided in the iron plates are entwined with each other and the outer periphery is in direct contact with the exterior frame, an adhesive agent is applied between the iron plates after lamination. It is possible to reduce the vibration and noise generated from the electric motor by injecting and hardening and fixing the iron plates to each other, or at least fixing the iron plates at the outer periphery of the iron plates, and to realize a low-vibration and low-noise electric motor. is there.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a stator core of an electric motor according to a first embodiment.

FIG. 2 is a configuration diagram of a stator core and an exterior frame of an electric motor according to a second embodiment.

FIG. 3 is a configuration diagram of a conventional stator core of an electric motor.

FIG. 4 is a configuration diagram of a stator core and an exterior frame of a conventional electric motor.

[Explanation of symbols]

 11 Stator Iron Core 12 Iron Plate 13 Notch 14 Adhesive 25 Exterior Frame

Claims (2)

[Claims] 1. An iron plate having a plate thickness of 0.7 mm or less is used, and the notches formed in the iron plate are entwined with each other and laminated and fixed,
A stator core of an electric motor, the outer periphery of which is assembled in contact with an exterior frame, wherein an iron plate is laminated and then an adhesive is injected and cured between the laminated layers to fix the iron plates together. 2. The stator core of an electric motor according to claim 1, wherein at least iron plates in the outer peripheral portion of the laminated cores are fixed to each other.