KR100446784B1 - Rotor for outer rotor type electric motor - Google Patents

Abstract

The present invention relates to a rotor of an outer rotor type electric motor, comprising: a rotor core disposed with a predetermined gap around a stator; A cylindrical rotor frame in which the rotor core is accommodated therein; And a plurality of stoppers protruding from the inner diameter surface of the rotor frame and spaced apart from each other along the circumferential direction of the rotor frame to limit the insertion depth of the rotor core to the rotor frame. Thereby, the rotor of the outer rotor type electric motor which can respond easily to the change of the lamination dimension of a core, can maintain uniform indentation depth, is easy to align an axis, and can be assembled easily.

Description

Rotor of outer rotor type electric motor {ROTOR FOR OUTER ROTOR TYPE ELECTRIC MOTOR}

The present invention relates to a rotor of an outer rotor type electric motor, and more particularly, can easily cope with a change in the lamination dimension of the core, maintain a uniform indentation depth, and facilitate alignment of axes and facilitate assembly. So that it relates to a rotor of an outer rotor type electric motor.

Electric motors generally generate the power of rotational movement, and in recent years, the use of so-called linear motors that produce the power of linear movement is increasing. Electric motors are classified into DC motors and AC motors according to the type of power source.

In general, a motor includes a conventional rotating motor having a stator (stator) to be fixedly arranged, a rotor (rotator) which is relative to the stator, that is, a rotating motion, and a slider which linearly reciprocates with respect to the stator. It is classified as a reciprocating motor.

The rotary electric motor is classified into an inner rotor type in which a rotor is rotatably disposed inside the stator, and an outer rotor type in which the rotor is rotatably disposed outside the stator.

1 is a sectional view of a conventional outer rotor type electric motor, and FIG. 2 is a perspective view before coupling of the rotor of the conventional outer rotor type electric motor. As shown in these figures, the outer rotor type motor has a stator 11 fixedly disposed at the center and a rotor rotatably disposed about the rotation shaft 29 with a predetermined gap around the stator 11. 21 is provided.

The stator 11 is wound around each of the stator cores 12 and the slots 13 of the stator cores 12, which are formed by insulating laminated steel sheets having a circular ring shape and having a plurality of slots 13 formed therein. The stator coil 14 generates a magnetic force.

On the other hand, the rotor 21 is disposed with a predetermined gap on the outside along the radial direction of the stator core 12, the rotor core 23 and the rotor core 23 that is relatively rotated by the stator coil 14 and the electromagnetic force, Rotor frame 25 is rotatably coupled to the outside of the).

The rotor frame 25 has a cylindrical shape which is upwardly open to allow the rotor core 23 to be press-fitted therein, and along the radial direction along the vertical direction so that the lower end of the rotor core 23 can be contacted and supported. The reduced locking jaw 27 is formed.

By the way, in such a conventional outer rotor type electric motor, the outer diameter surface of the rotor core 23 is pressed in contact with the inner diameter surface of the rotor frame 25 and the lower end of the rotor core 23 of the rotor frame 25 Since it is to be in full contact with the locking jaw 27, it is difficult to accurately match the center along the vertical direction of the rotor core 23 and the center along the vertical direction of the stator core 12 at the time of coupling, as well as the rotor The deviation of the insertion height of the core 23 is generated, the inclination of the axis of the rotor core 23 with respect to the stator core 12 occurs, there is a problem that the performance is deteriorated due to this. In addition, when the stacking dimension of the rotor core 23 or the stator core 12 is changed, the center of the rotor core 23 and the center in the vertical direction of the stator core 12 correspond to each other in order to correspond to each other. Since the position of the locking step 27 of the frame 25 needs to be changed, there is a problem that the shape of the rotor frame 25 needs to be changed.

Accordingly, it is an object of the present invention to provide a rotor of an outer rotor type electric motor which can easily cope with a change in the lamination dimension of the core, maintains a uniform indentation depth, and facilitates alignment of the axes and facilitates assembly. .

1 is a cross-sectional view of a conventional outer rotor type electric motor,

Figure 2 is a perspective view before coupling of the rotor of the conventional outer rotor type electric motor,

3 is a cross-sectional view showing a state of use of the rotor of the outer rotor type electric motor according to an embodiment of the present invention,

4 is a perspective view of a state before assembly of the outer rotor of FIG. 3;

5 is a plan view of the rotor frame of FIG.

FIG. 6 is a partial cutaway sectional view of the stopper region of FIG. 5. FIG.

Explanation of symbols on the main parts of the drawings

11: Stator 12: Stator Core

14: stator coil 21: rotor

23: rotor core 25: rotor frame

31: stopper

The object is, according to the present invention, a rotor core disposed with a predetermined gap around the stator; A cylindrical rotor frame in which the rotor core is accommodated therein; An outer rotor type electric motor comprising a plurality of stoppers protruding from the inner diameter surface of the rotor frame and spaced apart from each other along the circumferential direction of the rotor frame to limit the insertion depth of the rotor core to the rotor frame. Is achieved by the rotor.

Here, the stopper is preferably recessed from the outer diameter surface of the rotor frame and protrudes in a radial direction from the inner diameter surface of the rotor frame.

In addition, it is effective that the respective stoppers are arranged to be equally spaced from each other along the circumferential direction of the rotor frame.

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

Figure 3 is a cross-sectional view showing a state of use of the rotor of the outer rotor type electric motor according to an embodiment of the present invention, Figure 4 is a perspective view of a state before assembly of the outer rotor of Figure 3, Figure 5 is a rotor frame of Figure 3 6 is a partial cutaway sectional view of the stopper region of FIG. 5. The same and equivalent parts as those described above and shown in the drawings will be described with the same reference numerals. As shown in these figures, the rotor 21 of the outer rotor type electric motor is integrally formed with the rotor core 23 arranged with a predetermined gap outside the stator 11 and the outside of the rotor core 23. Coupled rotor frame 25 coupled to rotate integrally about the rotation axis 29, and a plurality of stoppers 31 formed to limit the insertion depth of the rotor core 23 from the inner diameter surface of the rotor frame 25 ) Is configured to include.

The rotor core 23 is formed to have a circular ring shape having an inner diameter extended relative to the outer diameter of the stator core 12 so that the rotor core 23 can be disposed with a predetermined gap on the outside along the radial direction of the stator core 12. .

On the other hand, the rotor frame 25 is formed to form a cylindrical shape with the upper side open so that the rotor core 23 can be press-fitted therein, the center along the vertical direction of the rotor core 23 at a predetermined depth from the inlet region When the center of the rotor core 23 along the up-down direction of the rotor core 23 is pressed in contact with the lower end of the rotor core 23 in contact with the lower end of the inner diameter so as to protrude from the inner diameter surface a plurality of A stopper 31 is formed.

Each stopper 31 is spaced apart from each other to form an equally spaced interval along the circumferential direction of the rotor frame 25, in this embodiment, the stopper 31 to form a 60-degree equal intervals along the circumferential direction 6 It consists of dogs. Each stopper 31 is recessed from the outer diameter surface of the rotor frame 25 formed of the iron plate member, and is formed to protrude along the radial direction from the inner diameter surface.

By such a configuration, when the rotor core 23 is disposed in the inlet region of the rotor frame 25 and the upper region of the rotor core 23 is pressed downward, the outer diameter surface of the rotor core 23 becomes the rotor frame 25. It is inserted into sliding contact with the inner diameter surface of the. When the insertion proceeds and the lower end of the rotor core 23 contacts the upper end of each stopper 31, the coupling is completed.

In the above-described and illustrated embodiments, the case in which six stoppers are configured to be spaced apart from each other by 60 degrees along the circumferential direction of the rotor frame has been described as an example. have.

As described above, according to the present invention, a rotor core that is spaced apart from each other with a predetermined gap around a stator, and a rotor frame of which a rotor core is accommodated and rotated integrally with the rotor core, and the rotor Providing a plurality of stoppers protruding from the inner diameter surface of the frame to limit the insertion depth when the rotor core is press-fitted, the rotor core is inserted into the rotor frame with a uniform press-in depth, easy axis alignment, along the vertical direction of the rotor core The rotor of the outer rotor type motor which can match the center and the center along the up-down direction of a stator can improve performance.

In addition, when the stacking dimension of the stator core and / or the rotor core is changed, the rotor of the outer rotor type electric motor can be provided that can be quickly responded without changing the shape of the frame because only the formation position of the stopper is adjusted.

Claims (3)

A rotor core disposed with a predetermined gap around the stator; A cylindrical rotor frame in which the rotor core is accommodated therein; An outer rotor type electric motor comprising a plurality of stoppers protruding from the inner diameter surface of the rotor frame and spaced apart from each other along the circumferential direction of the rotor frame to limit the insertion depth of the rotor core to the rotor frame. Rotor. The method of claim 1, The stopper is recessed from the outer diameter surface of the rotor frame rotor of the outer rotor type motor, characterized in that protrudes in a radial direction from the inner diameter surface of the rotor frame. The method according to claim 1 or 2, The stopper is the rotor of the outer rotor type motor, characterized in that arranged in the angular intervals with each other along the circumferential direction of the rotor frame.