KR102621847B1 - Cover assembly and Motor having the same - Google Patents

Abstract

The present invention includes a first cover; and a second cover coupled to the upper surface of the first cover, wherein the first cover includes a brush coupling portion that is concave and formed away from the lower surface of the second cover, and It includes an engaging protrusion that protrudes from the brush engaging portion and is formed away from the lower surface of the second cover, and the brush engaging portion includes an insulating cap that protrudes and is positioned between the engaging protrusion and the lower surface of the second cover in the height direction. A cover assembly for a motor is provided, which provides the advantageous effect of preventing short circuits from occurring by blocking mutual contact between the first cover, where the insulating cap is made of metal, and the extension part of the case.

Description

Cover assembly for a motor and a motor including the same {Cover assembly and Motor having the same}

The embodiment relates to a cover assembly for a motor and a motor including the same.

The motor is provided with a shaft that can rotate, a rotor coupled to the shaft, and a stator fixed to the inside of the housing. The stator is installed with a gap along the circumference of the rotor. The motor induces rotation of the rotor through electrical interaction. When a coil is wound around a rotor, a commutator and brushes are provided to supply current to the coil wound around the rotating rotor.

Typically, the commutator is coupled to a shaft and rotates while connected to a coil, and the brush is coupled to a housing and disposed to contact the commutator. At this time, the brush contacts the commutator to supply electricity.

The brush is included inside the case. Then, the case containing the brush is coupled to the cover assembly. The cover assembly is a member that covers the open upper part of the housing, and may be formed by combining a lower cover made of a mold member and an upper cover made of a metallic material. A case containing a brush is fixed to the lower surface of the lower member of the cover assembly. At this time, there is a cover assembly and a case that include a structure in which the extension portion of the case is bent up and fixed to the upper surface of the lower cover.

However, these cover assemblies and cases have a structure in which the extension part of the case rises to the top of the lower cover, so that it can easily contact the upper cover placed directly above the lower cover. If the extension of the case in contact with the brush comes into contact with the metal upper cover, there is a high risk of a short circuit.

The embodiment is intended to solve the above problem, and includes a cover assembly for a motor that can prevent contact between the extension of the case of the brush that is curved up above the lower cover of the cover assembly and the upper cover made of metal, and a motor including the same. The purpose is to provide.

The problems to be solved by the embodiment are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the description below.

An embodiment for achieving the above object includes a first cover and a second cover coupled to the upper surface of the first cover, wherein the first cover is concave and is formed apart from the lower surface of the second cover. It includes a brush engaging portion and a engaging protrusion that protrudes from the brush engaging portion and is formed apart from a lower surface of the second cover, wherein the brush engaging portion protrudes and is positioned between the lower surface of the second cover and the engaging protrusion in the height direction. A cover assembly for a motor including an insulating cap positioned can be provided.

Preferably, the first cover may be a mold member, and the second cover may be a metal member.

Preferably, the insulating cap may extend from the brush coupling portion and be rotatable.

Preferably, the insulating cap includes a fitting protrusion protruding from a lower surface, and the brush coupling part may include a fitting slot into which the fitting protrusion is inserted.

Another embodiment for achieving the above object includes a stator assembly, a rotor assembly disposed inside the stator and having a coil wound around a tooth, a rotating shaft coupled to the rotor assembly, and a stator coupled to the rotating shaft and connected to the coil. A cover assembly including a first cover disposed on a commutator and the stator, a second cover coupled to the first cover, a case coupled to the first cover, and a case included in the case and disposed to contact the commutator. and a brush assembly including a brush, wherein the case includes an extension part coupled to the first cover, and the first cover protrudes to cover the extension part, with respect to the axial direction of the rotation axis. It is possible to provide a motor including an insulating cap located between the second cover and the second cover.

Preferably, the first cover may be a mold member, and the second cover may be a metal member.

Preferably, the first cover includes a brush engaging portion that is concave and formed away from the lower surface of the second cover, and an engaging protrusion that protrudes from the brush engaging portion and is formed away from the lower surface of the second cover. can do.

Preferably, the insulating cap may extend from the brush coupling portion and be rotatable.

Preferably, the insulating cap includes a rotating shaft portion extending from the brush coupling portion and a cap portion extending from the rotating shaft portion and rotating, and the width of the cap portion may be larger than the width of the extension portion.

Preferably, the cap part includes a fitting protrusion protruding from a lower surface, and the brush coupling part may include a fitting slot into which the fitting protrusion is inserted.

Preferably, the extension part may be formed by extending the upper surface of the case.

Preferably, the extension portion may be bent to surround the coupling protrusion.

Preferably, the extension part may include a first extension piece disposed on one side of the fitting slot and a second extension piece disposed on the other side of the fitting slot.

According to an embodiment, an insulating cap is provided on the second cover to which the case of the brush is fixed. The insulating cap blocks contact between the first cover made of metal and the extension part of the case, providing the advantageous effect of preventing short circuits from occurring.

According to the embodiment, the advantageous effect of preventing a short circuit from occurring by preventing foreign substances from becoming caught between the first cover and the extension portion of the case is provided.

According to the embodiment, the insulating cap is implemented in the second cover, providing the advantageous effect of reducing manufacturing costs.

1 is a diagram showing a motor according to an embodiment;
Figure 2 is an enlarged view of AA shown in Figure 1, showing a cover assembly and a brush assembly;
Figure 3 is a view showing a brush coupling portion formed on the first cover;
Figure 4 is a view showing two brush coupling parts;
5 is a view showing an extension of the case disposed on the brush coupling portion;
Figure 6 is a view showing the extension of the case coupled to the coupling protrusion of the brush coupling part;
Figure 7 is a diagram showing an insulating cap covering the extension part.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. Additionally, terms or words used in this specification and patent claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle that it can be done, it must be interpreted with a meaning and concept consistent with the technical idea of the present invention. And in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention are omitted.

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

FIG. 1 is a diagram illustrating a motor according to an embodiment, and FIG. 2 is an enlarged view of A-A shown in FIG. 1, illustrating a cover assembly and a brush assembly. The z-axis shown in FIGS. 1 and 2 represents the axial direction or height direction of the motor, and the x-axis represents the radial direction of the motor.

Referring to Figures 1 and 2, the motor according to the embodiment includes a cover assembly 100, a stator assembly 200, a rotor assembly 300 including a coil 400, a rotating shaft 500, and a commutator. It may include (600) and a brush assembly (700).

The stator assembly 200 causes electrical interaction with the rotor assembly 300 to induce rotation of the rotor assembly 300. The stator assembly 200 is coupled to the inside of the housing 1, and the stator assembly 200 may include a plurality of magnets. The magnet forms a rotating magnetic field with the coil 400 wound around the rotor assembly 300.

Meanwhile, the stator assembly 200 may be manufactured by combining a plurality of split cores or may be manufactured in the form of a single core.

The rotor assembly 300 is disposed inside the stator assembly 200. Rotor assembly 300 includes insulator 2. A coil 400 is wound on the insulator 2. When current is supplied to the coil 400, electrical interaction with the magnet occurs and the rotor assembly 300 rotates. When the rotor assembly 300 rotates, the rotation shaft 500 also rotates. At this time, the rotating shaft 500 may be supported by the bearing 3.

Meanwhile, a commutator 600 and a brush assembly 700 are required to supply current to the rotating rotor assembly 300.

The commutator 600 is coupled to the rotating shaft 500. And the commutator 600 may be disposed above the rotor assembly 300. A commutator element 610 may be included around the commutator 600 . And the commutator element 610 is electrically connected to the coil 400. Meanwhile, the brush 600 contacts the commutator 400 to apply an external drive signal to the coil 230. Thirteen commutator elements 410 may be disposed along the circumference of the commutator 600, corresponding to the thirteen teeth 220 of the rotor assembly 200.

The brush assembly 700 is disposed in close contact with the commutator 600. Brush assembly 700 may be installed in housing 1. Brush assembly 700 may include a case 710 and a brush 720. A brush 720 is installed inside the case 710. Two brushes 720 may be disposed, but the present invention is not limited thereto. The two brush assemblies 700 may be spaced 63° to 66° apart.

Referring to FIG. 2, the cover assembly 100 may include a first cover 110 and a second cover 120. The second cover 120 is coupled to the upper surface of the first cover 110. A case 710 is coupled to the lower surface of the first cover 110. An extension portion 711 is formed on the upper surface of the case 710. The extension portion 711 may be bent to be located on the upper surface of the first cover 110. In order to fix the curved extension portion 711, a coupling protrusion 112 may be provided in a protruding form on the upper surface of the first cover 110.

Figure 3 is a diagram showing a brush coupling portion formed on the first cover.

Referring to FIGS. 2 and 3 , the first cover 110 may include a brush coupling portion 111 . The brush coupling portion 111 is formed concavely on the upper surface of the first cover 110 and is a portion where the extension portion 711 of the case 710 is seated. Accordingly, the brush coupling portion 111 is formed to correspond to the position of the brush assembly 700.

The brush coupling portion 111 may include a coupling protrusion 112. The coupling protrusion 112 may be provided adjacent to the inner peripheral surface of the brush coupling portion 111. The other coupling protrusion 112 may be provided adjacent to the outer peripheral surface of the brush coupling portion 111.

The coupling protrusion 112 may be formed to protrude convexly from the upper surface of the brush coupling portion 111. The upper portion of the coupling protrusion 112 may be provided in a round shape so that the extension portion 711 of the case 710 can be bent and wound. Additionally, the coupling protrusion 112 may be implemented in the form of a protruding bar formed long along the width direction of the brush coupling portion 111.

The brush coupling portion 111 may include an insulating cap 111a. Based on the height direction (z-axis direction in FIG. 2), the insulating cap 111a is disposed between the second cover 120 and the coupling protrusion 112, and is connected to the second cover 120 and the case (made of a metal material) It serves to physically prevent the extension portion 711 of 710) from contacting.

The insulating cap 111a may include a rotating shaft portion 111aa, a cap portion 111ab, and a fitting protrusion 111ac. The rotating shaft portion 111aa is coupled to the upper surface of the brush coupling portion 111. The cap portion 111ab is formed to be rotatable on the pivot shaft portion 111aa. The connection portion between the cap portion 111ab and the rotating shaft portion 111aa may be formed to be relatively thin, so that the cap portion 111ab may be formed to rotate around the rotating shaft portion 111aa. The cap portion 111ab is formed larger than the extension portion 711 so as to cover the entire extension portion 711 of the case 710.

The rotation axis portion 111aa is shown as being formed long in the width direction of the brush coupling portion 111. The embodiment is not limited to this, and the rotation axis portion 111aa may be formed to be long in the radial direction.

The fitting protrusion 111ac may be provided to protrude from the lower surface of the cap portion 111ab. The fitting protrusion 111ac is fitted into the fitting slot 113 formed in the brush coupling portion 111. The fitting protrusion 111ac is fixed to the fitting slot 113, and the cap part 111ab is fixed so as not to move while covering the extension part 711 of the case 710. This insulating cap 111a may be molded integrally with the first cover 110.

As an example, two insulating caps 111a may be provided on the brush coupling portion 111. One of the two insulating caps 111a may be arranged to cover the coupling protrusion 112 located adjacent to the inner peripheral surface of the brush coupling portion 111. Another one may be arranged to cover the coupling protrusion 112 located adjacent to the outer peripheral surface of the brush coupling portion 111.

Meanwhile, holes 114 that guide the extension portion 711 of the case 710 to penetrate and rise to the top of the brush coupling portion 111 may be formed near the outer and inner peripheral surfaces of the brush coupling portion 111. .

Figure 4 is a diagram showing two brush coupling parts.

Referring to FIG. 4, two brush coupling portions 111 may be provided to correspond to two brushes. Additionally, an insulating cap 111a may be formed on each brush coupling portion 111.

Figure 5 is a view showing an extension of the case disposed on the brush coupling portion.

Referring to FIG. 5 , the extension portion 711 may be formed by extending both edges of the upper surface of the case 710 . This extension 711 passes through the hole 114 and is disposed on the brush coupling portion 111. At this time, the extension portion 711 of the case 710 may include a first extension piece 711a and a second extension piece 711b. The first extension piece 711a and the second extension piece 711b are formed apart from each other to form a space therebetween. And the first extension piece 711a may be disposed on one side based on the fitting slot (113 in FIG. 3). The second extension piece 711b may be disposed on the other side of the fitting slot 113.

The end of the first extension piece 711a and the end of the second extension piece 711b may be formed to be tapered toward the end.

Figure 6 is a diagram showing an extension of the case coupled to the engaging protrusion of the brush engaging portion.

Referring to FIG. 6, the first extension piece 711a and the second extension piece 711b raised above the upper surface of the brush coupling portion 111 are bent to surround the coupling protrusion 112. At this time, the fitting slot 113 is located between the first extension piece 711a and the second extension piece 711b.

Figure 7 is a diagram showing an insulating cap covering the extension part.

Referring to FIG. 7, the insulating cap 111a covers the first extension piece 711a and the second extension piece 711b surrounding the coupling protrusion 112. The operator can easily fix the insulating cap 111a by pressing it to cover the first extension piece 711a and the second extension piece 711b. When the insulating cap 111a covers the first extension piece 711a and the second extension piece 711b, it physically prevents the extension portion 711 and the second cover 120 from contacting each other.

Above, the cover assembly for a motor and the motor including the same according to a preferred embodiment of the present invention have been examined in detail with reference to the attached drawings.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Cover assembly
110: first cover
111: Brush coupling part
111a: insulating cap
112: Combining protrusion
120: second cover
200: Stator assembly
300: Rotor assembly
400: coil
500: rotation axis
600: commutator
700: Brush assembly
710: case
711: extension
711a: First extension
711b: Second extension
720: Brush

Claims (13)

a first cover; and
It includes a second cover coupled to the upper surface of the first cover,
The first cover includes a brush engaging portion that is concave and formed away from the lower surface of the second cover, and an engaging protrusion that protrudes from the brush engaging portion and is formed away from the lower surface of the second cover,
The brush coupling portion includes an insulating cap that protrudes and is positioned between the lower surface of the second cover and the coupling protrusion in the height direction,
The insulating cap extends from the brush coupling portion and is rotatably formed,
The insulating cap is,
a rotating shaft extending from the upper surface of the brush coupling portion; and
It includes a cap portion that extends from the rotating shaft portion and rotates,
A cover assembly for a motor wherein the thickness of the connection portion of the rotating shaft portion and the cap portion is formed to be thinner than the thickness of the rotating shaft portion and the cap portion. According to claim 1,
A cover assembly for a motor wherein the first cover is a mold member and the second cover is a metal member. delete According to claim 1,
A cover assembly for a motor wherein the insulating cap includes a fitting protrusion protruding from a lower surface, and the brush coupling part includes a fitting slot into which the fitting protrusion is inserted. stator assembly;
a rotor assembly disposed inside the stator and having a coil wound around teeth;
a rotating shaft coupled to the rotor assembly;
A commutator coupled to the rotating shaft and connected to the coil; And
A cover assembly including a first cover disposed on the stator and a second cover coupled to the first cover; And
A brush assembly including a case coupled to the first cover and a brush included inside the case and disposed to contact the commutator,
The case includes an extension part coupled to the first cover,
The first cover includes an insulating cap positioned between the first cover and the second cover based on the axial direction of the rotation shaft so as to protrude and cover the extension portion,
The first cover includes a brush coupling portion that is concave and formed away from the lower surface of the second cover,
The insulating cap extends from the brush coupling portion and is rotatable. According to clause 5,
The first cover is a mold member, and the second cover is a metal member. According to clause 6,
The first cover is formed to protrude from the brush engaging portion and includes a coupling protrusion formed away from a lower surface of the second cover. delete According to clause 5,
The insulating cap includes a rotating shaft portion extending from the brush coupling portion and a cap portion extending from the rotating shaft portion and rotating, and the width of the cap portion is formed to be larger than the width of the extension portion. According to clause 9,
The cap portion includes a fitting protrusion protruding from a lower surface, and the brush coupling portion includes a fitting slot into which the fitting protrusion is inserted. According to clause 7,
The extension portion is a motor formed by extending the upper surface of the case. According to claim 11,
The extended portion is a motor formed by bending to surround the engaging protrusion. According to claim 10,
The extension part includes a first extension piece disposed on one side of the fitting slot and a second extension piece disposed on the other side of the fitting slot, with respect to the fitting slot.

Images