KR102361355B1 - Shaft Rotor and Motor having the same - Google Patents

Abstract

The present invention is a shaft; coupling part; and a plurality of magnets installed on an outer circumferential surface of the coupling part, wherein the shaft and the coupling part are integrally formed with a shaft rotor and a motor having the same. Accordingly, by installing the magnet directly on the shaft, the number of parts and man-hours are reduced, thereby reducing cost and improving productivity.

Description

Shaft Rotor and Motor having the same

The present invention relates to a shaft rotor and a motor having the same. More particularly, it relates to a shaft rotor having a magnet installed on the shaft and a motor having the same.

In general, a motor generates power while rotating due to an interaction between a rotor having a plurality of magnets and an electromagnetic force generated by a coil wound around a stator. Here, the rotor may include a cylindrical rotor core and a plurality of magnets installed on an outer circumferential surface of the rotor core.

Accordingly, the motor is provided with a rotatably formed shaft, a rotor coupled to the shaft, and a stator fixed to the inside of the housing, and the stator is installed with a gap along the circumference of the rotor.

In addition, a coil forming a rotating magnetic field is wound around the stator to induce electrical interaction with the rotor to induce rotation of the rotor. Accordingly, when the rotor rotates, the shaft rotates.

Meanwhile, the shaft may include a shaft skive formed on an outer circumferential surface of the shaft for coupling with the rotor.

The shaft skive is formed to be elongated along the axial direction of the shaft. In addition, when the rotor core is press-fitted into the shaft, the shaft skive fixes the rotor core to the shaft.

Here, the rotor core is a component made by laminating very thin steel plates, and it is difficult to manage the roughness of the adhesive surface to which the magnet is attached.

Therefore, there is a problem that uniform surface contact is difficult when the magnet is adhered, and accordingly, the adhesive force is lowered, and thus the magnet is detached.

The technical problem to be achieved by the present invention is to solve the above problems, and to provide a shaft rotor directly installing a magnet and a motor having the same.

The above object according to a preferred embodiment of the present invention, the shaft; coupling part; and a plurality of magnets installed on an outer circumferential surface of the coupling part, wherein the shaft and the coupling part are achieved by a shaft rotor integrally formed.

Here, the coupling portion may have a larger diameter than the shaft.

In addition, it may further include a magnet guide rib formed on the outer peripheral surface of the coupling portion to guide the magnet.

Here, the magnet guide rib may be formed to be elongated in the axial direction of the coupling portion.

In addition, it may further include a bonding part installed between the coupling part and the magnet.

The bonding part is characterized in that it is thermally cured.

On the other hand, the above object according to a preferred embodiment of the present invention, the above-described shaft rotor; a stator accommodating the shaft rotor; and a housing accommodating the shaft rotor and the stator.

In the shaft rotor according to a preferred embodiment of the present invention having the above configuration, the number of parts and man-hours is reduced by directly installing a magnet to the coupling portion integrally formed with the shaft, thereby reducing cost and improving productivity.

In addition, since the magnet is directly installed on the outer circumferential surface of the coupling part of the shaft, the adhesive strength is superior to that of a rotor core made by laminating very thin steel plates.

In addition, it is easier to process the magnet guide rib on the shaft compared to the conventional rotor core.

1 is a view showing a motor according to a preferred embodiment of the present invention,
2 and 3 are a perspective view and an exploded perspective view showing a shaft rotor according to a preferred embodiment of the present invention;
4 is a cross-sectional view taken along line AA of FIG. 2 .

Since the present invention may have various changes and may have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as second, first, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted.

1 is a view showing a motor according to a preferred embodiment of the present invention, FIGS. 2 and 3 are a perspective view and an exploded perspective view showing a shaft rotor according to a preferred embodiment of the present invention, and FIG. 4 is AA of FIG. It is a cross-sectional view showing a line.

1 to 4, the motor 1 according to a preferred embodiment of the present invention includes a housing 100, a stator 200, and a shaft rotor 300 according to a preferred embodiment of the present invention. can do.

Hereinafter, in the motor 1 according to a preferred embodiment of the present invention, the longitudinal direction of the shaft rotor 300 is referred to as an axial direction, and a direction perpendicular to the axial direction is referred to as a radial direction.

The stator 200 in which the coil is wound is installed inside the housing 100, and a cylindrical space may be formed in the center of the stator 200. The shaft rotor 300 in which a plurality of magnets are installed in this space. ) is rotatably installed.

The shaft rotor 300 disposed inside the stator 200 generates power while rotating by interaction with electromagnetic force generated by a coil wound around the stator 200 .

Here, the housing 100 is provided in a cylindrical shape corresponding to the stator 200 so that the cylindrical stator 200 can be mounted, and the stator 200 is provided on the inner circumferential surface of the cylindrical housing 100. The shaft rotor The position may be fixed regardless of the rotation of 300 .

2 and 3, the shaft rotor 300 according to a preferred embodiment of the present invention includes a shaft 310, a magnet guide rib 320, a plurality of magnets 330, and a bonding unit 340. may include

As shown in FIG. 3 , the shaft 310 may include a coupling part 311 formed in a cylindrical shape and integrally formed in the axial direction while one area protrudes in the radial direction.

That is, the coupling part 311 may be integrally formed with the shaft 310 . And, as shown in FIGS. 2 and 3 , the coupling part 311 may be formed to have a larger diameter than the diameter of the shaft 310 .

The magnet guide rib 320 may be formed on the outer peripheral surface of the coupling part 311 .

2 and 3, the magnet guide rib 320 may be formed on the outer peripheral surface of the coupling part 311 long in the axial direction, and guide the magnet 330 when the magnet 330 is coupled. . As shown in FIG. 4 , the outer peripheral surface of the magnet 330 and the end surface of the magnet guide rib 320 are disposed on the same radius with respect to the rotation center of the shaft 310 . In this case, the magnet guide rib 320 may be formed to have a rectangular horizontal cross-section. Accordingly, the entire circumferential side surface of the magnet guide rib 320 may contact the circumferential side surface of the magnet 330 to guide the arrangement of the magnet 330 . And, since the magnet 330 undergoes a bonding process that is adhered to the space between the magnet guide ribs 320, a bonding unit 340 is formed between the magnet guide rib 320 and the magnet 330. can be placed.

Processing and integrally forming the magnet guide rib 320 on the coupling portion 311 of the shaft 310 is very easy compared to forming the guide rib on a conventional rotor core made by laminating thin steel plates.

In addition, since the formation position of the magnet guide rib 320 is determined by processing, the installation accuracy of the magnet 330 is improved.

Accordingly, after the magnet 330 is guided by the magnet guide ribs 320 , it is installed between the magnet guide ribs 320 .

The bonding part 340 is installed between the outer peripheral surface of the shaft 310 and the magnet 330 .

More specifically, as shown in FIG. 4 , the shaft rotor 300 may further include a bonding part 340 installed between the outer peripheral surface of the coupling part 311 and the magnet 330 .

That is, the magnet 330 is subjected to a bonding process to be adhered to the space between the magnet guide ribs 320 .

At this time, the magnet 330 is directly installed on the outer circumferential surface of the coupling part 311, and since it is easy to manage the illuminance of the outer circumferential surface of the coupling part 311, the magnet 330 is installed in the coupling part 311 through a bonding operation. This enables uniform bonding while having superior adhesion compared to a conventional rotor core made by laminating very thin steel sheets.

Accordingly, the magnet 330 installed on the outer peripheral surface of the coupling part 311 is not easily separated by an external force due to the bonding part 340 .

Meanwhile, the magnet 330 is fixed to the coupling part 311 through a curing process of thermally curing the bonding part 340 after the bonding process of being adhered to the outer circumferential surface of the coupling part 311 .

In summary, since the magnet 330 is directly installed on the shaft 310 of the shaft rotor 300 in the shaft rotor 300 and the motor 1 having the same according to the preferred embodiment of the present invention, the conventional rotor The process of installing the core and the conventional rotor core is eliminated, thereby reducing manufacturing cost and improving productivity.

In addition, since the magnet 330 is directly installed on the outer circumferential surface of the shaft 310, this direct bonding method has excellent adhesion compared to the method of bonding the magnet 330 to a conventional rotor core made by laminating very thin steel plates. .

In addition, the installation accuracy of the magnet 330 through the magnet guide rib 320 is improved.

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as described in the claims below. You will understand that it can be done.

1: motor
100: housing 200: stator
300: shaft rotor 310: shaft
320: magnet guide rib 330: magnet

Claims (7)

shaft;
coupling part;
a plurality of magnets installed on the outer circumferential surface of the coupling part; and
and a magnet guide rib formed on an outer circumferential surface of the coupling part to guide the magnet,
The shaft, the coupling part, and the magnet guide rib are integral,
The outer peripheral surface of the magnet disposed on the same radius with respect to the center of the shaft and the end surface of the magnet guide rib contact,
The magnet guide rib is formed to have a rectangular horizontal cross section,
As the magnet guide rib is formed in the axial direction of the coupling portion, the circumferential side of the magnet guide rib is formed in a rectangular shape,
The entire circumferential side surface of the magnet guide rib is in contact with the circumferential side surface of the magnet to guide the arrangement of the magnet,
A shaft rotor having a bonding portion disposed between the magnet guide rib and the magnet. According to claim 1,
The coupling portion is a shaft rotor having a larger diameter than the shaft. delete delete According to claim 1,
The shaft rotor further comprising a bonding part installed between the coupling part and the magnet. 6. The method of claim 5,
The shaft rotor, characterized in that the bonding portion is thermally cured. A shaft rotor according to any one of claims 1, 2, and 5 to 6;
a stator accommodating the shaft rotor; and
a housing accommodating the shaft rotor and the stator;
An outer peripheral surface of the shaft rotor is formed in a circular shape by an end surface of the magnet guide rib and an outer peripheral surface of the magnet.

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