KR0126245Y1 - Bearing supporting device of a motor - Google Patents

Abstract

The present invention relates to a bearing support device for an electric motor, and an object of the present invention is to attach a metal bushing having a coefficient of linear expansion and a bearing to a bearing support device for fixing a bearing, so that the bearing may be subjected to thermal expansion of the bearing support device due to heat generation during operation of the motor. It is to provide a bearing support device for an electric motor which prevents the flow of oil and thus prolongs the life of the bearing and reduces the noise of the bearing.

The bearing support device for an electric motor according to the present invention for achieving the above object is an end bracket having a bearing hole for bearing shaft and bearing support device for fixing both sides of the cylindrical housing in which both sides of the motor components are opened. And a metal bushing having a linear expansion coefficient similar to that of the bearing pressed into the bearing support portion.

Description

Bearing support device of electric motor

The present invention relates to a bearing support device for an electric motor, and in particular, a metal bushing having a linear expansion coefficient similar to that of the bearing is integrally formed with the end bracket to prevent the flow of the bearing due to thermal expansion during the operation of the motor, thereby prolonging the life of the bearing and the noise of the bearing. It relates to a bearing support device of the motor with reduced.

In general, the bearing is used to support the rotating shaft of the motor and to reduce the friction force to facilitate the rotational movement of the rotating shaft.

1 is a cross-sectional view showing a conventional electric motor configuration, wherein both sides of the cylindrical housing 10 and the housing 10 in which the stator 40 and the rotor 50 into which the rotating shaft 60 is press-fitted are built are opened. It is composed of an end bracket 20 formed of an aluminum material covering both open sides.

The end bracket 20 is formed with a bearing support 20a, which is a bearing support device in which the bearing 30 is press-fitted and fixed to the axial hole 20b and the axial hole 20b.

In addition, the bearing 30 has an outer ring 30a as a fixed body that is press-fitted to the bearing support 20a, an inner ring 30b as a rotating body that is pressed into the rotating shaft 60, and an inner and outer ring 30b ( Interposed between 30a) is composed of a plurality of balls (30c) to the cloud movement.

By the above configuration, when a current is supplied to the stator 40 to generate magnetic flux, the current is induced in the rotor 50 to rotate the rotating shaft 60.

At this time, the bearing 30 is rotated by the inner ring (30b) is pressed in the rotating shaft 60, the outer ring (30a) is fixed to the bearing support portion 20a of the end bracket 20, the outer ring (30a) and the inner ring ( A plurality of balls (30c) interposed between 30b) is rotated to reduce the support and rotational friction of the rotating shaft 60.

However, in the bearing support apparatus of the conventional electric motor configured as described above, heat is generated in the stator 40, the rotor 50, etc. during the operation of the electric motor, and is conducted to the housing 10, the end bracket 20, and the like. The end bracket 20 formed of aluminum is thermally expanded by heat. At this time, since the coefficient of linear expansion is different between the bearing support 20a and the outer ring 30a of the bearing 30 press-fitted and fixed to the bearing support 20a, a gap is generated between the bearing support 20a and the outer ring 30a, and thus the outer ring 30a. ) Causes the noise to flow and the rotational friction of the rotating shaft 60 is increased, the life of the bearing 30 is shortened.

Accordingly, the present invention was made to solve the above problems, and an object of the present invention is to form a metal bushing having a linear expansion coefficient similar to that of a bearing in a bearing support device for fixing a bearing integrally with an end bracket, and thus bearings generated by heat generation during operation of the motor. An object of the present invention is to provide a bearing support device for an electric motor which prevents the flow of the bearing due to thermal expansion of the support device, thereby extending the life of the bearing and reducing the noise of the bearing.

1 is a cross-sectional view showing a conventional electric motor configuration.

2 is a cross-sectional view showing the configuration of the electric motor according to the present invention.

3 is a detailed cross-sectional view of the end bracket applied to the electric motor of FIG.

* Explanation of symbols for main parts of the drawings

10 housing 20 end bracket

20a: bearing support 20b: shaft hole

30: bearing 40: stator

50: rotor 60: rotation axis

70: bushing

In order to achieve the above object, a bearing support device for an electric motor according to the present invention includes a cylindrical housing having at least a stator and a rotor into which a rotating shaft is pressed, an end bracket covering both sides of the housing, and the end bracket. In the bearing support device of the electric motor is formed in the interior of the bearing including a support for fixing the rotating shaft,

Press-fit the bearing in the bearing support, characterized in that it comprises a bushing formed integrally with the end bracket using a metal material having a linear expansion coefficient similar to that of the bearing.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, in all the drawings for demonstrating an embodiment, the thing with the same function uses the same code | symbol, and the repeated description is abbreviate | omitted.

2 is a cross-sectional view showing the configuration of the motor according to the present invention, Figure 3 shows a detailed cross-sectional view of the end bracket applied to the motor of FIG.

In the drawing, reference numeral 10 denotes a cylindrical housing 10 in which both sides of which the components of the electric motor are built, such as the rotor 50, into which the stator 40 and the rotating shaft 60 are press-fitted, are opened.

Reference numeral 20 denotes an end bracket 20 formed of an aluminum material covering both open sides of the housing 10. The end bracket 20 is a bearing support 20a which is a shaft hole 20b and a bearing 30 support device. Is formed.

Reference numeral 70 denotes a bushing 70 press-fitted into the bearing support 20a. The bushing 70 is formed of a metal such as steel and brass having a coefficient of linear expansion with respect to the bearing 30.

Referring to the effect of the present invention by the above configuration is as follows.

By press-fitting and mounting a metal bushing 70 having a linear expansion coefficient similar to that of the bearing 30 in the bearing support portion 20a, which is a bearing support device formed in the end bracket 20, the stator 40 and the rotor 50 are generated by heat generation. Even if the bearing support is expanded, the bearing 30 press-fitted in the bushing 70 is prevented from flowing.

Accordingly, smooth rotation of the rotating shaft 60 is ensured when the rotating shaft 60 is rotated, thereby reducing the performance deterioration factor of the motor and preventing the bearing 30 from extending the life of the bearing 30 and noise.

As described above, according to the bearing support device of the motor according to the present invention, by securing a bearing by adding a metal bushing having a similar coefficient of linear expansion to the bearing support device to the bearing support device, it ensures a firm fixing of the bearing regardless of the invention of the motor It is a useful design that reduces the bearing life and bearing noise.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following utility model registration claims Should be seen.

Claims (1)

An electric motor including a cylindrical housing having at least a stator and a rotor into which a rotating shaft is press-fitted, an end bracket covering both sides of the housing, and a bearing support portion formed inside the end bracket to support and secure the rotating shaft. The bearing support device of claim 1, wherein the bearing in the bearing support part is press-fitted and provided with a bushing formed integrally with the end bracket by using a metal material having a linear expansion coefficient similar to that of the bearing. Device.