KR20170129419A - Cover assembly and Motor having the same - Google Patents

Abstract

The present invention provides a cover assembly for a motor. The cover assembly includes a first cover and a second cover coupled to the upper surface of the first cover. The first cover includes a brush engagement part recessed to be separated from the lower surface of the second cover and an engagement protrusion protruding from the brush engagement prat and separated from the lower surface of the second cover. The brush engagement part protrudes and includes an insulating cap located between the lower surface of the second cover and the engagement protrusion in a height direction. The insulating cap prevents the occurrence of a short circuit by blocking mutual contact between the first cover which is a metal material, and the extension part of a case.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cover assembly for a motor,

Embodiments relate to a cover assembly for a motor and a motor including the same.

The motor is provided with a shaft rotatably formed, 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 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.

Typically, the commutator rotates in conjunction with the shaft in engagement with the shaft, and the brush is coupled to the housing and is disposed in contact with the commutator. At this time, the brush contacts the commutator and supplies electricity.

The brush is contained inside the case. And the case including the brush is coupled to the cover assembly. The cover assembly is a member that covers the upper part of the opened housing, and the lower cover made of the mold member and the upper cover made of the metallic material are combined. A case including 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 including a structure in which an extension of the case is bent and fixed to the upper surface of the lower cover.

However, since the cover assembly and the case are structured such that the extension of the case is lifted up from the lower cover, the cover assembly and the case can easily contact the upper cover disposed directly above the lower cover. When the extension of the case in contact with the brush contacts the top cover of the metal material, there is a great risk of short-circuiting.

SUMMARY OF THE INVENTION An embodiment of the present invention is directed to a motor cover assembly for preventing contact between an extension of a case of a brush bent over a lower cover of a cover assembly and an upper cover of a metal material, And the like.

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 of the present invention, there is provided an electronic apparatus including a first cover and a second cover coupled to an upper surface of the first cover, wherein the first cover is recessed and formed to be apart from a lower surface of the second cover And a coupling protrusion formed on the lower surface of the second cover and protruding from the lower surface of the second cover, the brush coupling part protruding from the lower surface of the second cover in the height direction, And an insulating cap disposed on the insulating cap.

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

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

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

According to another aspect of the present invention, there is provided a rotor assembly including a stator assembly, a rotor assembly disposed on the inner side of the stator and having a coil wound around the teeth, a rotary shaft coupled to the rotor assembly, A cover coupled to the first cover and including a first cover disposed on the stator and a second cover coupled to the first cover, and a case coupled to the first cover and disposed in contact with the commutator, Wherein the first cover includes an extension that engages with the first cover, the first cover protrudes to cover the extension, and the first cover includes a second brush, And an insulating cap positioned between the first cover and the second cover.

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

Preferably, the first cover includes a brush engagement portion formed to be separated from the lower surface of the second cover, and a coupling protrusion protruded from the brush engagement portion and formed apart from the lower surface of the second cover can do.

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

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

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

Preferably, the extended portion may be formed by extending an upper surface of the case.

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

Advantageously, the extension may include a first extension disposed on either side of the insertion slot, and a second extension disposed on the other side of the insertion slot, with respect to the insertion slot.

According to the embodiment, the insulating cover is provided on the second cover on which the case of the brush is fixed. The insulating cap prevents the occurrence of short-circuiting by preventing mutual contact between the first cover, which is a metal material, and the extension of the case.

According to the embodiment, it is possible to prevent foreign matters from being caught between the first cover and the extension of the case, thereby preventing a short-circuit from occurring.

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

1 shows a motor according to an embodiment,
Figure 2 is an enlarged view of AA shown in Figure 1, showing the cover assembly and brush assembly,
3 is a view showing a brush engagement portion formed in the first cover,
Figure 4 shows two brush engagement parts,
5 is a view showing an extension of a case disposed on the brush engagement portion,
6 is a view showing an extension of a case that engages with the engaging projection of the brush engagement portion,
7 is a view showing an insulating cap covering an extension part.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary terms and the inventor should properly define the concept of the term in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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.

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

1 and 2, a motor according to an embodiment includes a cover assembly 100, a stator assembly 200, a rotor assembly 300 including a coil 400, a rotating shaft 500, (600), and a brush assembly (700).

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

Meanwhile, the stator assembly 200 may be manufactured by combining a plurality of divided cores, or may be fabricated into a single core.

The rotor assembly 300 is disposed inside the stator assembly 200. The rotor assembly 300 includes an insulator 2. On the insulator 2, a coil 400 is wound. When an electric current is supplied to the coil 400, electrical interaction with the magnet is induced and the rotor assembly 300 rotates. When the rotor assembly 300 rotates, the rotary shaft 500 also rotates. At this time, the rotary shaft 500 can be supported by the bearing 3.

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

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). The commutator segment 610 is electrically connected to the coil 400. The brush 600 contacts the commutator 400 and applies an external driving signal to the coil 230. Thirteen commutator pieces 410 may be disposed along the circumference of the commutator 600 corresponding to thirteen teeth 220 of the rotor assembly 200. [

The brush assembly 700 is disposed in close contact with the commutator 600. The brush assembly 700 may be installed in the housing 1. The 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 disposed at an angle of 63 [deg.] To 66 [deg.].

Referring to FIG. 2, the cover assembly 100 may include a first cover 110 and a second cover 120. The second cover 120 is engaged with the upper surface of the first cover 110. A case 710 is coupled to a lower surface of the first cover 110. An extended portion 711 formed on the upper surface of the case 710 is formed. The extension portion 711 may be bent and positioned on the upper surface of the first cover 110. In order to fix the bent extension part 711, a coupling protrusion 112 may protrude from the upper surface of the first cover 110.

3 is a view showing a brush engagement portion formed in the first cover.

Referring to FIGS. 2 and 3, the first cover 110 may include a brush engagement portion 111. The brush engagement portion 111 is a recessed portion formed on the upper surface of the first cover 110 and seats the extended portion 711 of the case 710. Accordingly, the brush engagement portion 111 is formed corresponding to the position of the brush assembly 700.

The brush engagement portion 111 may include the engagement protrusion 112. [ The engaging projection 112 may be provided adjacent to the inner circumferential surface of the brush engagement portion 111. The other engagement protrusion 112 may be provided adjacent to the outer circumferential surface of the brush engagement portion 111,

The engaging projections 112 may protrude from the upper surface of the brush engaging portion 111 in a convex manner. The upper portion of the engaging projection 112 may be provided in a rounded shape so that the extended portion 711 of the case 710 can be bent. The engaging projections 112 may be formed in the shape of protruding bars formed along the width direction of the brush engaging portion 111.

The brush engagement portion 111 may include an insulation cap 111a. The insulating cap 111a is disposed between the second cover 120 and the engaging protrusion 112 to define a second cover 120 made of a metal material and a case 710 to contact the extended portion 711 of the contact portion 711. [

The insulating cap 111a may include a rotating shaft portion 111aa, a cap portion 111ab, and a fitting protrusion 111ac. The rotation shaft portion 111aa is engaged with the upper surface of the brush engagement portion 111. [ The cap portion 111ab is rotatably formed on the rotation shaft portion 111aa. The connection portion between the cap portion 111ab and the pivot shaft portion 111aa is formed to have a relatively small thickness so that the cap portion 111ab can be formed to pivot around the pivot shaft portion 111aa. The cap portion 111ab is formed to be larger than the extended portion 711 so as to cover all the extended portions 711 of the case 710. [

 Although the pivot shaft portion 111aa is illustrated as being elongated in the width direction of the brush engagement portion 111, The embodiment is not limited to this, and the pivot shaft portion 111aa may be formed to be long in the radial direction.

The fitting protrusion 111ac may protrude from the lower surface of the cap portion 111ab. The fitting projection 111ac is fitted in the fitting slot 113 formed in the brush engagement portion 111. [ The fitting projection 111ac is fixed to the fitting slot 113 so that the cap portion 111ab is fixed so as not to move in a state in which the extension portion 711 of the case 710 is covered. The insulating cap 111a may be integrally formed with the first cover 110. [

As an example, two insulating caps 111a may be provided on the brush engagement portion 111. [ Any one of the two insulating caps 111a may be arranged to cover the engaging projection 112 located adjacent to the inner peripheral surface of the brush engaging portion 111. [ And the other may be arranged to cover the engaging projection 112 located adjacent to the outer peripheral surface of the brush engagement portion 111. [

A hole 114 may be formed in the vicinity of the outer circumferential surface and the inner circumferential surface of the brush engagement portion 111 so as to guide the extension portion 711 of the case 710 into the upper portion of the brush engagement portion 111 .

4 is a view showing two brush coupling parts.

Referring to FIG. 4, two brush engagement parts 111 may be provided corresponding to the two brushes. An insulation cap 111a may be formed on each of the brush engagement parts 111.

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

Referring to FIG. 5, the extended portion 711 may be formed by extending both side edges of the upper surface of the case 710. The extension portion 711 penetrates the hole 114 and is disposed on the brush engagement portion 111. At this time, the extended portion 711 of the case 710 may include a first extended piece 711a and a second extended piece 711b. The first extending piece 711a and the second extending piece 711b are formed to be spaced apart from each other to form a space therebetween. And the first extension piece 711a may be disposed on either side with respect to the fitting slot (113 in Fig. 3). And the second extending piece 711b may be disposed on the other side with respect to the fitting slot 113. [

The ends of the first extending piece 711a and the second extending piece 711b may be tapered toward the ends.

6 is a view showing an extension of a case that engages with the engaging projection of the brush engagement portion.

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

7 is a view showing an insulating cap covering an extension part.

Referring to FIG. 7, the insulating cap 111a covers the first extension piece 711a and the second extension piece 711b which surround the coupling protrusion 112. As shown in FIG. The operator can easily press the insulating cap 111a to fix 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, the extended portion 711 and the second cover 120 are physically prevented from coming into contact with each other.

The motor cover assembly according to one preferred embodiment of the present invention and the motor including the motor cover assembly have been described in detail with reference to the accompanying drawings.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Cover assembly
110: first cover
111: Brush coupling part
111a: Insulation cap
112: engaging projection
120: second cover
200: stator assembly
300: rotor assembly
400: coil
500:
600: commutator
700: Brush assembly
710: Case
711: Extension
711a: first extension
711b: second extension
720: Brushes

Claims (13)

A first cover
And a second cover coupled to an upper surface of the first cover,
Wherein the first cover includes a brush engagement portion formed in a concave shape and spaced apart from a lower surface of the second cover, and an engaging protrusion protruded from the brush engagement portion and spaced apart from a lower surface of the second cover,
Wherein the brush engagement portion includes an insulation cap protruded to be positioned between the lower surface of the second cover and the engagement protrusion in the height direction. The method according to claim 1,
Wherein the first cover is a mold member, and the second cover is a metal member. 3. The method of claim 2,
Wherein the insulating cap extends from the brush engagement portion so as to be rotatable. The method of claim 3,
Wherein the insulating cap includes a fitting protrusion protruding from a bottom surface thereof, and the brush coupling portion includes a fitting slot into which the fitting protrusion is inserted. A stator assembly;
A rotor assembly disposed inside the stator and having a coil wound on the teeth;
A rotating shaft coupled to the rotor assembly;
A commutator coupled to the rotating shaft and connected to the coil;
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 in the case and disposed so as to be able to contact the commutator,
The case including an extension coupled to the first cover,
Wherein the first cover includes an insulating cap located between the first cover and the second cover with respect to an axial direction of the rotating shaft so as to protrude to cover the extended portion. 6. The method of claim 5,
Wherein the first cover is a mold member, and the second cover is a metal member. The method of claim 6,
Wherein the first cover includes a brush engaging portion formed to be spaced apart from a lower surface of the second cover and an engaging protrusion protruded from the brush engaging portion and spaced apart from a lower surface of the second cover. 8. The method of claim 7,
And the insulating cap is formed to be rotatable by extending from the brush engagement portion. 9. The method of claim 8,
Wherein the insulation cap includes a rotation shaft portion extending to the brush engagement portion, and a cap portion extending from the rotation shaft portion and rotating, wherein a width of the cap portion is larger than a width of the extension portion. 10. The method of claim 9,
Wherein the cap portion includes a fitting protrusion protruding from a lower surface thereof, and the brush coupling portion includes a fitting slot into which the fitting protrusion is inserted. 8. The method of claim 7,
And the extended portion is formed by extending an upper surface of the case. 12. The method of claim 11,
And the extending portion is bent to surround the engaging projection. 11. The method of claim 10,
Wherein the extension includes a first extension disposed on either side of the insertion slot and a second extension disposed on the other side of the insertion slot with respect to the insertion slot.

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