KR20180040007A - Transfer Car for cleaning - Google Patents

Abstract

An embodiment of the present invention relates to a rotor which includes: a rotor core; and an insulator arranged to cover at least one region of the rotor core, wherein the rotor core includes: an inner side part; and an outer side part arranged to be stepped on the outside of the inner side part and the height (h1) of the outer side part is higher than the height (h2) of the inner side part, and a motor of a lightening structure including the same. Accordingly, the size of the motor can be reduced.

Description

Rotor and motor equipped therewith (Transfer Car for cleaning)

The embodiment relates to a rotor and a motor having a lightening structure having the rotor.

The motor may include a rotating shaft rotatably disposed, a rotor coupled to the rotating shaft, and a stator fixed inside the housing. Here, the stator is disposed with a gap along the circumference of the rotor.

Then, the motor induces rotation of the rotor by electrical interaction. When the coil is wound on the rotor, a commutator and a brush are provided to supply current to the coil wound on the rotating rotor.

Normally, the commutator is coupled to the rotating shaft while rotating in conjunction with the coil, and the brush is coupled to the housing and disposed to be in contact with the commutator. At this time, the brush contacts the commutator and supplies electricity.

However, there is a problem of touch risk that a wire connected to the hook of the commutator touches one side of the rotor core at the time of fabrication of the lightening motor.

For example, when the wire is bent on the hook side by press-fitting the commutator, the rotor core may be touched.

Furthermore, as the interval between the commutator and the rotor core is narrowed to reduce the size of the motor, the possibility that a wire connected to the hook is touched on the inner wall portion of the rotor core is increased, which is a limitation in applying the conventional insulator Lt; / RTI >

A rotor capable of reducing the gap between the rotor core and the commutator for making the motor thinner, and a motor including the rotor.

Further, there is provided a rotor including an insulator for preventing a touch of a coil by press-fitting of a commutator, and a motor including the same.

The problems to be solved by the embodiments are not limited to the above-mentioned problems, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.

According to an embodiment, the object is achieved by a rotor core comprising: a rotor core; And an insulator disposed to cover at least one region of the rotor core, wherein the rotor core comprises: an inner portion; And an outer side portion stepped outwardly of the inner side portion, wherein a height h1 of the outer side portion is achieved by a rotor larger than a height h2 of the inner side portion.

The insulator includes: a main body; And a protrusion extending inwardly from the body, and the protrusion may be disposed so as to cover a stepped surface formed by stepping the outer side.

Here, the protrusion may be formed in an annular shape, and may have a cross-sectional shape.

Further, the insulator may further include a cover portion formed to extend from the end of the protrusion to cover the upper surface of the inner portion.

According to an embodiment of the present invention, A rotor disposed on the rotating shaft; A commutator disposed on the rotating shaft; A coil connected to the commutator and wound on the rotor; A stator disposed outside the rotor; A housing for housing the rotor and the stator; And a brush disposed closely to the commutator, wherein the rotor comprises: a rotor core; And an insulator disposed to cover at least one region of the rotor core, wherein the rotor core comprises: an inner portion; And an outer side portion stepped outwardly of the inner side portion, wherein a height h1 of the outer side portion is achieved by a motor having a height h2 greater than the inner side portion.

The insulator includes: a main body; And a protrusion extending inwardly from the body, and the protrusion may be disposed so as to cover a stepped surface formed by stepping the outer side.

Here, the protrusion may be formed in an annular shape, and may have a cross-sectional shape.

Further, the insulator may further include a cover portion formed to extend from the end of the protrusion to cover the upper surface of the inner portion.

The lower end of the commutator may be spaced apart from the upper surface of the inner side so as to have a predetermined gap (G).

The motor according to the embodiment having the above-described structure includes a rotor core having a stepped surface formed thereon, and an insulator insulating the stepped surface, thereby reducing the size of the motor, thereby making the motor thinner.

Further, the insulator can prevent the coil from being touched to the rotor core by press-fitting the commutator.

1 is a view showing a motor according to an embodiment,
2 is a perspective view showing a rotor according to an embodiment,
3 is an exploded perspective view showing the rotor according to the embodiment,
Figs. 4 and 5 are cross-sectional views showing the AA line of the rotor according to the embodiment,
6 is a cross-sectional view showing a region B in Fig. 1,
FIG. 7 is a diagram illustrating a touch risk section located in a rotor core of a rotor according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The 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 a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In the description of the embodiments, when an element is described as being formed "on or under" another element, the upper or lower (lower) (on or under) all include that the two components are in direct contact with each other or that one or more other components are indirectly formed between the two components. Also, when expressed as 'on or under', it may include not only an upward direction but also a downward direction based on one component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined, 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 commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

The motor 1 according to the embodiment relates to a lightweight type motor and can include a stepped rotor core and an insulator for insulating the rotor core to reduce the axial length of the motor 1. [

1, a motor 1 according to an embodiment includes a rotor 2, a housing 300, a cover 400, a stator 500, a rotating shaft 600, a commutator 700, A coil 800 and a brush 900 as shown in FIG. Here, the rotor 2 may include a rotor core 100 and an insulator 200.

The rotor 2 may be rotatably disposed inside the stator 500.

2 to 5, the rotor 2 includes a rotor core 100 coupled to the center of rotation axis 600 and an insulator 200 disposed at upper and lower portions of the rotor core 100, respectively. can do. Here, the rotor core 100 can be formed by laminating a plurality of thin silicon steel plates.

The rotor 2 is an example in which the insulator 200 is disposed on the upper and lower portions of the rotor core 100, but the present invention is not limited thereto. For example, in the rotor 2 according to the embodiment, the insulator 200 according to the embodiment may be disposed only at the upper portion of the rotor core 100, and a known insulator may be used at the lower portion of the rotor core 100. The insulator 200 may be disposed at the lower portion of the rotor core 100 without the projecting portion 220 or the lid portion 230. [

However, when the same insulator 200 is disposed on the upper and lower portions of the rotor core 100, the cost can be reduced because the same mold can be used in the simplification of the assembling process and in the manufacture of the insulator.

The rotor core 100 may include an inner portion 110 to which the rotary shaft 600 is centrally coupled and an outer portion 120 that is stepped outwardly of the inner portion 110. Here, the inner portion 110 and the outer portion 120 may be integrally formed.

The inner side 110 may be formed in a cylindrical shape. A hole 113 may be formed in the center of the inner side 110 to pass through the upper surface 111 and the lower surface 112. The rotation shaft 600 may be disposed in the hole 113.

The outer portion 120 is disposed outside the inner portion 110. 4, the outer side 120 may be disposed on the outer side of the inner side 110 so that the stepped surface 121 is formed. That is, the outer side 120 may be disposed on the outer side of the inner side 110 with respect to the stepped surface 121.

4, the height h1 of the outer portion 120 is formed to be larger than the height h2 of the inner portion 110, as shown in FIG. 4, as the outer portion 120 is stepped and the stepped surface 121 is formed .

The hypothetical line H serving as a reference of the height h1 of the outer side 120 and the height h2 of the inner side 110 is perpendicular to the imaginary line C passing the axial center of the rotary shaft 600 . The line H may pass through the center of the rotor core 100.

3, the outer portion 120 may include a cylindrical body 122 and a plurality of slots 123 disposed along the outer circumferential surface of the body 122. [ At this time, the inner side 110 may be arranged on the inner side of the body 122 in a stepped manner.

The insulator 200 may be disposed on the upper and lower portions of the rotor core 100 to insulate one region of the rotor core 100. Accordingly, the insulator 200 can be arranged to cover the upper and lower portions of the lateral portion 120.

The insulator 200 may include a body 210 and a protrusion 220 protruding inwardly from the body 210.

The main body 210 may be wound with a coil 800. [ The main body 210 may include protrusions 211 spaced apart from each other to prevent the coil 800 from being detached from the coil 800 when the coil 800 is wound. Here, the protruding portion 211 disposed on the outer side may be formed into an arc shape when viewed from above. The protrusions 211 disposed on the inner side may be formed in an annular shape.

The protrusions 220 may be arranged to cover the stepped surfaces 121, as shown in Figs. The protrusion 220 protrudes inward from the main body 210 and may be formed integrally with the main body 210.

In addition, the protrusions 220 are formed in an annular shape, and as shown in FIG. 4, the protrusions 220 may have a cross-sectional shape. Accordingly, the projecting portion 220 can insulate the stepped surface 121. That is, the protrusion 200 may be formed to extend from the inner end of the main body 210 toward the rotation axis 600, and then be bent toward the upper surface 111 of the inner side 110. 5, the protrusion 220 is formed to extend from the inner end of the body 210 toward the rotation axis 600 and then extends in a direction perpendicular to the upper surface 111 of the inner portion 110 . At this time, the projecting portion 220 may be arranged to be in contact with the stepped surface 121.

7, if the protrusion 220 is not present in the motor 1, the coil 800 is bent by the press-fitting of the commutator 700, and the rotor core 100 is touched May occur. At this time, as shown in FIG. 7, a touch risk section P having a high possibility of touch risk can be formed in the rotor core 100.

Therefore, the protrusion 220 of the motor 1 can insulate the touch risk section P having a high possibility of touch risk.

Accordingly, the motor 1 can be designed to have a reduced size in the direction of the rotation axis 600 without burdening the touch risk.

The insulator 200 may further include a lid 230 covering the upper surface 111 of the inner side 110. The protrusions 220 of the insulator 200 can be disposed between the main body 210 and the cover portion 230. [

5, the lid part 230 may cover the upper surface 111 of the inner side part 110 to prevent dust from being adhered to the upper surface 111 of the inner side part 110 due to wear of the brush 900 have.

5, the lid part 230 may be formed to protrude from the one end of the protrusion 220 toward the rotation shaft 600. [ The lid part 230 may extend from one end of the protrusion 220 toward the rotation shaft 600. The lid 230 covers the upper surface 111 of the inner side 110, but the present invention is not limited thereto. The lid 230 may be disposed to cover a part of the upper surface 111. At this time, the lid part 230 may be arranged to be in contact with the upper surface 111.

The insulator 200 having the lid portion 230 may be disposed on the lower portion of the rotor core 100 to prevent the dust from adhering to the lower surface 112 of the inner side portion 110.

The housing 300 together with the cover 400 forms the outer shape of the motor 1 and can determine the size of the motor 1. [

As the housing 300 and the cover 400 are coupled, a receiving space may be formed therein.

The rotor 2, the stator 500, the rotating shaft 600, the commutator 700, the coil 800, and the brush 900 may be disposed in the receiving space.

The cover 400 may be disposed on the top of the housing 300. For example, the cover 400 may be arranged to cover the opening formed in the upper portion of the housing 300. At this time, the cover 200 is disposed on the upper portion of the housing 300 and can be fixed by an adhesive member or a fixing member.

The stator 500 may be disposed outside the rotor 2. A plurality of magnets (not shown) may be disposed in the stator 500.

The magnet may form a rotating magnetic field with the coil 800 wound around the rotor 2. [ Thereby, the rotor 2 can rotate. Here, the magnet may be arranged such that the N pole and the S pole alternate with respect to the circumferential direction.

The rotary shaft 600 may be disposed at the center of the rotor 2. As the rotor 2 rotates, the rotation shaft 600 can rotate together. At this time, the rotary shaft 600 can be supported by the bearing 10.

The motor 1 may include a commutator 700 and a brush 900 to supply a current to the coil 800 wound on the rotor 2.

The commutator 700 may be disposed on the outer circumferential surface of the rotating shaft 600. At this time, the commutator 700 may be disposed above the rotor core 100 of the rotor 2. 5, the lower end of the commutator 700 may be spaced apart from the upper surface 111 of the inner side portion 110 to have a predetermined gap G. As shown in FIG.

The gap G determines the length of the motor 1 in the direction of the rotation axis 600. That is, as the gap G becomes smaller, the size of the motor 1 in the direction of the rotation axis 600 becomes smaller. Accordingly, the lightening of the motor 1 can be further improved.

That is, the motor 1 includes a rotor core 100 formed to be stepped so as to form a stepped surface 121, and an insulator 200 having a protrusion 220 to insulate the stepped surface 121 from the gap G ) Can be reduced. Accordingly, the size of the motor 1 in the direction of the rotation axis 600 can be improved to 5 to 10 mm.

A plurality of hooks 710 may be provided around the commutator 700.

When the coil 800 is wound on the rotor 2, the hook 710 electrically connects the commutator 700 and the coil 800, and fixes one area of the coil 800 to the commutator 700.

The brush 900 may be disposed under the cover 400. The brushes 900 may be formed into a rod shape having conductivity.

The brush 900 may be in close contact with the commutator 700. Accordingly, the brushes 900 can electrically contact the commutator 700 to provide a drive signal applied from the outside to the commutator 700. [0050] FIG. Accordingly, an external driving signal may be applied to the coil 800

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be understood that the present invention can be changed. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: motor 2: rotor
10: Bearings
100: rotor core 110: inner side
120: outer side 121:
200: insulator 210: main body
220: protrusion
300: housing
400: cover
500: stator
600:
700: commutator 710: hook
800: Coil
900: Brush

Claims (9)

Rotor core; And
And an insulator disposed to cover at least one region of the rotor core,
The rotor core includes:
A medial side; And
And an outer side portion that is stepped on the outer side of the inner side portion,
And a height (h1) of the outer side portion is larger than a height (h2) of the inner side portion. The method according to claim 1,
The insulator
main body; And
A protrusion extending inwardly from the body,
And the projecting portion is disposed so as to cover a stepped surface formed by stepping the outer side portion. 3. The method of claim 2,
Wherein the protrusions are formed in an annular shape and have a cross-sectional shape. 3. The method of claim 2,
Wherein the insulator further includes a cover portion formed to extend from the end of the protrusion to cover the upper surface of the inner portion. A rotating shaft;
A rotor disposed on the rotating shaft;
A commutator disposed on the rotating shaft;
A coil connected to the commutator and wound on the rotor;
A stator disposed outside the rotor;
A housing for housing the rotor and the stator; And
And a brush disposed in close contact with the commutator,
The rotor may include:
Rotor core; And
And an insulator disposed to cover at least one region of the rotor core,
The rotor core includes:
A medial side; And
And an outer side portion that is stepped on the outer side of the inner side portion,
And the height h1 of the outer side portion is larger than the height h2 of the inner side portion. 6. The method of claim 5,
The insulator
main body; And
A protrusion extending inwardly from the body,
And the protruding portion is disposed so as to cover the stepped surface formed by stepping the outer side portion. The method according to claim 6,
Wherein the protrusions are formed by ring formation and have a cross-sectional shape. The method according to claim 6,
Wherein the insulator further includes a cover portion formed to extend from the end of the protrusion to cover the upper surface of the inner portion. 8. The method of claim 7,
And the lower end of the commutator is spaced apart from the upper surface of the inner side portion so as to have a predetermined gap (G).

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