KR100686098B1 - hybrid induction motor - Google Patents

Abstract

The present invention relates to a hybrid induction motor that is easy to assemble and reduces noise. In order to achieve the above object, the present invention provides a stator comprising: a stator; Rotor; A rotating shaft for transmitting a rotational force of the rotor; A permanent magnet rotor rotating between a stator and the rotor by a rotor system generated by the stator and generating a rotor system to rotate the rotor; And a bracket formed with a stator and a single injection assembly so as to form an outer appearance of the hybrid induction motor and having a bearing seating portion in which a bearing for rotatably supporting the rotary shaft is seated in a central portion, There is provided a hybrid induction motor having a preventing means for preventing a bearing from being idle.

HIM, hybrid induction motor, bearings, prevention means, O-ring

Description

[0001] The present invention relates to a hybrid induction motor,

1 is a side cross-sectional view of a conventional hybrid induction motor;

2 is a sectional view taken along line A-A 'in Fig.

3 is a cross-sectional view schematically showing a bearing seating portion of a conventional hybrid induction motor.

4 is a cross-sectional view schematically showing an example of a means for preventing a hybrid induction motor according to the present invention.

5 is a cross-sectional view schematically showing another example of the means for preventing the hybrid induction motor according to the present invention.

6 is a cross-sectional view schematically showing still another example of the means for preventing the hybrid induction motor according to the present invention.

Description of the Related Art [0002]

1: Hybrid induction motor 10: Stator

20: Rotor 30: Permanent magnet rotor

40: rotating shaft 150: bracket

151: Bearing 152: Bearing seating part

153: Prevention means 154: O-ring groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid induction motor (hereinafter referred to as " HIM "), and more particularly to a hybrid induction motor with improved assemblability and reduced noise generation and manufacturing costs.

1 is a side cross-sectional view of a conventional HIM and is a cross-sectional view taken along line A-A 'in Fig. As shown in FIGS. 1 and 2, the HIM includes a stator, a rotor, a permanent magnet rotor, a rotating shaft, and a bracket.

The stator 10 includes a stator core 11 and a stator coil 12 formed by stacking a silicon steel sheet, for example. The steel plate forming the stator core is hollow and has a tooth 13 disposed at a predetermined angle along the inner circumference and projecting radially inward and a slot 14 as a space between the teeth and the teeth. The stator coil 12 is inserted into the slot 14 of the stator and wound around the teeth 13.

A squirrel cage rotor core is generally used for the rotor 20, and FIGS. 1 and 2 show the cage rotor core.

The rotor 20 is formed by laminating steel plates having a plurality of slots 21 formed at predetermined angles along an outer periphery of a predetermined radius from the center. The rotor includes a rod-shaped conductor bar 22 inserted into the slot 21 of the rotor core. The rod-like conductor bar is usually made of copper or aluminum.

Both ends of the agitator rotor core are connected to an end ring 23 for electrical short-circuiting through the conductor bar, and this is generally formed by aluminum die casting.

Meanwhile, the rotor 20 has a shaft hole 24 formed at the center thereof. The rotary shaft (40) for transmitting the rotational force of the rotor to the outside is press-fitted into the shaft hole so that the rotor and the rotary shaft integrally rotate.

The permanent magnet rotor (30) includes a permanent magnet (31) rotatable with a predetermined gap between the stator and the rotor, and a permanent magnet frame (32) rotatably supporting the permanent magnet on the rotary shaft . Here, the permanent magnet frame has a bearing seating portion 33 formed at its rotation center, and a ball bearing 34, for example, is inserted into the bearing seating portion so that the permanent magnet rotor rotatably supports the rotary shaft 40 do.

The permanent magnet rotor comprises a cylindrical permanent magnet 31 and a cup-shaped permanent magnet frame 32. Here, the permanent magnet and the permanent magnet frame are coupled to each other through, for example, an adhesive.

The general HIM includes a lower bracket 50 which is fixedly coupled to the stator 10 to form an outer appearance of the HIM and protects various structures accommodated therein. The lower bracket is coupled with the upper bracket to form an overall appearance of the HIM.

FIG. 3 is a view schematically showing a state in which a bearing and a rotating shaft are engaged in a bearing seating portion formed in a conventional bracket.

As shown in the figure, the rotation shaft passes through the bracket and is rotatably supported by the bearing 51, for example, with respect to the bracket.

Further, in recent years, the stator may be formed as a single injection assembly in order to increase the assemblability of the HIM, lower the risk of electric shock, etc., and increase the stability. That is, the rotor core and the rotor coil are integrally formed through a BMC (bulk mold compound) molding. Here, the BMC molding may be formed integrally with the lower bracket.

However, in the conventional HIM, there is a problem in that a bearing seating portion formed at the center portion of the upper bracket and the lower bracket to press the bearing is required to be precisely machined. 3, if the dimension of the bearing seating portion is small, the bearing can not be inserted and assembled. If the dimension is large, there is a problem that the bearing 51 is loose when the rotation shaft rotates Noise is generated during rotation of the rotary shaft, and the durability of the HIM is adversely affected.

Such a problem is further exacerbated when the upper and lower brackets 50 are manufactured through injection, because a separate bearing seat 52 is required due to the limitation of the injection dimension.

This problem occurs even when the stator is integrally formed with the lower bracket integrally with the BMC molding and the bearing seating portion is formed on the BMC molding itself.

Accordingly, there is a need for a method of solving the above-described problems without requiring additional processing in the bearing seat.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hybrid induction motor that is easier to assemble and can reduce noise and manufacturing cost.

According to an aspect of the present invention, there is provided a stator including a stator, a rotor, a rotating shaft for transmitting a rotating force of the rotor, a bracket, and a rotating system including a stator, Wherein the bracket forms an outer surface of the hybrid induction motor and protects the induction motor, and a center portion of the hybrid induction motor is rotatable about a rotation axis The bearing portion is formed with a bearing portion on which the bearing is mounted so as to be rotatably supported, and the bearing portion includes a preventing means for preventing the bearing from being idle.

Here, the stator may be formed as a single injection assembly, and in this case, the bracket may be formed integrally with the stator.

The bracket may include a first bracket (see 150 in FIG. 4) to which the rotor is fixedly coupled, and a second bracket (not shown) coupled to the first bracket. In this case, The one bracket may be formed of the stator and the single injection assembly.
Although the first bracket and the second bracket are not clearly shown in FIG. 4, the lower portion of the bracket 50, which forms the outer shape of the motor, corresponds to the first bracket of the present invention and the upper portion corresponds to the present invention Lt; RTI ID = 0.0 > bracket < / RTI >

Meanwhile, in the above-described HIM, the prevention means may be one which uses a frictional force between the seating portion and the bearing, and the preventing means may use a frictional force between the seating portion and the outer peripheral surface of the bearing.

The prevention means may be a friction force between the seating portion and the vertical surface of the bearing, or a frictional force between the seating portion and the outer circumferential surface of the bearing.

Here, the prevention means may be a rubber band inserted into the bearing seating portion. The prevention means may be an O-ring made of rubber. In this case, it is preferable that the bearing seating portion is provided with an O-ring groove on which the O-ring is seated.

Hereinafter, a preferred embodiment of the HIM according to the present invention will be described in detail with reference to the accompanying drawings, and duplicated description of the same constitution as the conventional one will be omitted.

The HIM according to the present invention includes a stator, a rotor, a rotating shaft, a bracket, and a permanent magnet rotor rotating the rotor between the stator and the rotor.

Here, the bracket forms an outer appearance of the hybrid induction motor, protects the induction motor, and a seat is seated in the center of the hybrid induction motor to bear the bearing so that a rotation shaft passing through the bracket is rotatably supported.

In addition, the seat portion includes a preventing means for preventing the bearing from being idle.

Figs. 4 to 6 show the preventing means for preventing the bearing from being idle in the HIM according to the present invention.

4, the bracket 150 is formed with a bearing seating portion 152 on which the bearing 151 is seated, and the bearing seating portion 152 is formed to be somewhat more spacious than the outer diameter of the bearing. That is, it is preferable that the bearing seating portion does not require any additional machining, but is formed somewhat loose in consideration of the outer diameter of the bearing during casting or injection molding.

Of course, the bearing seating part 152 may be formed precisely so that the bearing 151 can be pressed in during casting or injection molding, but it may be undesirable because the manufacturing cost may be too high.

Therefore, it is preferable that the bearing portion is formed with sufficient space from the beginning so that the bearing can be seated without any additional machining, and means for separately preventing the bearing from being idle is provided.

Theoretically, the rotation of the rotary shaft and the bearing seat on which the bearing is mounted are not interfered with each other. That is, the rotation axis is rotated irrespective of the bearing seating portion. However, when the rotation shaft 40 (see FIG. 3) rotates, frictional force is generated in the bearing 151, and the rotation shaft does not concentrically rotate but performs fine eccentric rotation. Therefore, Can rotate with respect to the portion (152).

However, since the frictional force through the bearing is very small and the eccentric rotation of the rotating shaft is minute, the force for rotating the bearing is very small. Therefore, the rotational force of the bearing can be prevented by only a predetermined frictional force.

Therefore, as a means for preventing the bearing from being idle in the HIM according to the present invention, it is preferable to use a frictional force between the bearing and the bearing seat. The prevention means may be a rubber material band 153, which is inserted into the inner circumferential surface of the bearing seating portion, and then the bearing is inserted so that the outer circumferential surface of the bearing and the band contact with each other.

On the other hand, the band of the rubber material may be in contact with a vertical surface through which the rotation axis of the bearing penetrates, without being in contact with the outer peripheral surface of the bearing. Of course, in this case, the band should not interfere with the rotation of the rotation shaft.

The band of the rubber material may be formed so as to be in contact with the outer peripheral surface of the bearing and the vertical surface of the bearing, as shown in FIG. 4, and the rubber band may be integrally formed or separately formed.

5 to 6, the preventing means for preventing the bearing from being idle is inserted between the inner circumferential surface of the bearing seating portion 152 and the outer circumferential surface of the bearing 151, And a rubber-like O-ring 153 that generates a frictional force to prevent the bearing from rotating with respect to the shaft.

Meanwhile, the bearing seating part may be provided with an O-ring groove 154 in which the O-ring is located. That is, the O-ring is inserted and fixed so as to prevent the bearing 151 from being idle more stably.

As shown in FIG. 5, the O-ring groove 154 may be formed so that the O-ring does not move in the up and down direction at the bearing seating portion. As shown in FIG. 6, It may be formed so as not to move. That is, in the latter case, the thrust applied to the bearing seating portion when the rotary shaft rotates is formed only in the downward direction.

The stator in the HIM according to the present invention may be formed as a single injection assembly. That is, the stator and the stator coil provided in the stator may be integrally formed by BMC molding. In this case, a first bracket and a second bracket, which are coupled to the upper and lower portions of the single injection assembly, may be included.

That is, in this case, the first and second brackets may be provided with a bearing seating portion 152 having the preventive means.

Meanwhile, the stator and the first bracket in the HIM according to the present invention may be integrally formed. That is, in the single injection assembly described above, BMC molding including the first bracket can be performed. In this case, the bearing seating part 152 may be formed at the same time as the BMC molding.

As described above, the bearing seating portion in the HIM according to the present invention is formed by casting or injection regardless of the material of the bracket or the single injection assembly in which the bearing seating portion is formed, so that no separate processing is required .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the present invention, it is possible to provide a hybrid induction motor in which the bearing assembly is more easily assembled and the bearing is prevented from being idle, thereby reducing noise and manufacturing cost.

Claims (10)

Stator; Rotor; A rotating shaft for transmitting a rotational force of the rotor; A permanent magnet rotor rotating between a stator and the rotor by a rotor system generated by the stator and generating a rotor system to rotate the rotor; And And a bracket formed with a bearing seat on which a bearing for rotatably supporting the rotation shaft is seated in a central portion thereof, the bracket including a stator and a single injection assembly for forming an appearance of a hybrid induction motor, And the bearing seating portion is provided with a preventing means for preventing the bearing from being idle. The method according to claim 1, Wherein the preventing means uses a frictional force between the seating portion and an outer peripheral surface of the bearing. 3. The method of claim 2, Wherein the bracket includes a first bracket formed integrally with the stator to form a single injection assembly, and a second bracket coupled to the first bracket. 4. The method according to any one of claims 1 to 3, Wherein the prevention means is a band made of a rubber material having an L-shaped cross section. Stator; Rotor; A rotating shaft for transmitting a rotational force of the rotor; A permanent magnet rotor rotating between a stator and the rotor by a rotor system generated by the stator and generating a rotor system to rotate the rotor; And a bracket formed with a bearing seat on which a bearing for rotatably supporting the rotation shaft is seated in a central portion thereof, the bracket including a stator and a single injection assembly for forming an appearance of a hybrid induction motor, Wherein an O-ring groove is formed on the bearing seat to locate an O-ring on an outer circumferential surface of the bearing to prevent the bearing from being loosened. Stator; Rotor; A rotating shaft for transmitting a rotational force of the rotor; A permanent magnet rotor rotating between a stator and the rotor by a rotor system generated by the stator and generating a rotor system to rotate the rotor; And And a bracket formed with a bearing seat on which a bearing for rotatably supporting the rotation shaft is seated in a central portion thereof, the bracket including a stator and a single injection assembly for forming an appearance of a hybrid induction motor, The bearing seating part may further include a rubber band formed in the shape of 'L' in cross section so as to prevent the bearing from being idle by simultaneously using frictional force between the seating part and the vertical and outer surfaces of the bearing. Hybrid induction motor. delete delete delete delete

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