KR102478516B1 - Motor - Google Patents

Abstract

The present invention is a shaft; a rotor including a hole in which the shaft is disposed; A stator disposed outside the rotor and a housing accommodating the rotor and the stator, the housing comprising: a body; A bracket disposed on one side of the body, the body including a first groove concavely disposed on an inner circumferential surface, and the bracket protruding radially from an outer circumferential surface to include a protrusion fitted with the first groove; , The protrusion may provide a motor including a second groove disposed concavely on at least one of upper and lower surfaces of the protrusion.

Description

motor {Motor}

The embodiment relates to a motor.

A motor includes a rotor and a stator. And, the motor may include a housing accommodating the rotor and the stator. The housing serves to physically fix the stator and at the same time protect the rotor and stator by isolating them from the external space.

The housing may include a body with an open top and a cover made of metal covering the body. At this time, the cover may be press-fitted and coupled to the body. At this time, the cover is a metal material. Since the body is also made of a metal material, chips may be generated while the cover is press-fitted into the body. There is a problem in that the generated chip may be located between the rotor and the stator and adversely affect the performance of the motor.

Accordingly, the embodiment is intended to solve the above problems, and an object thereof is to provide a motor capable of reducing generation of chips in a process in which a cover of a housing is press-fitted into a body.

An embodiment for achieving the above object includes a shaft, a rotor including a hole in which the shaft is disposed, a stator disposed outside the rotor, and a housing accommodating the rotor and the stator, the housing comprising: , A body and a bracket disposed on one side of the body, wherein the body includes a first groove concavely disposed on an inner circumferential surface, and the bracket protrudes radially from an outer circumferential surface to fit the first groove. It may include a protrusion, and the protrusion may include a second groove concavely disposed on at least one of an upper surface and a lower surface of the protrusion.

Preferably, the body includes a flange extending outward in a radial direction from an upper end of the body, and the first groove may be disposed on the flange.

Preferably, a concavo-convex portion may be disposed on an outer surface of the protrusion.

Preferably, the second groove includes a first surface and a second surface and a third surface connected to both ends of the first surface, respectively, the first surface is disposed to correspond to the outer surface of the protrusion, The second surface and the third surface are disposed to correspond to the side surface of the protrusion, respectively.

Preferably, the second groove is connected to the second surface and the third surface, is disposed facing the first surface, and may be disposed corresponding to an inner circumferential surface of the bracket.

Preferably, the bracket may include an outer portion contacting the body, an inner portion disposed inside the outer portion, and a stepped portion connecting the outer portion and the inner portion.

Preferably, the first groove may be disposed across the protrusion and the outer portion.

Preferably, a cover plate disposed below the bracket is further included, the bracket includes a coupling protrusion protruding downward from a lower surface of the bracket, and the cover plate has an axis corresponding to a position of the coupling protrusion. and a coupling hole formed to penetrate in a direction, and the coupling protrusion may be disposed inside the coupling hole.

Preferably, the concavo-convex part may be disposed symmetrically with respect to a reference line passing through a center of width of the protrusion and a center of the bracket.

Preferably, the second groove may be symmetrically arranged with respect to a reference line passing through a center of width of the protrusion and a center of the bracket.

According to the embodiment, it provides an advantageous effect of securing the performance of the motor by preventing chips from being generated while the cover of the housing is press-fitted into the body.

1 is a view showing a motor according to an embodiment;
2 is an exploded view of the motor shown in FIG. 1;
3 is a view showing a first groove disposed in the body of the housing;
4 is a view showing a protrusion disposed on a bracket of a housing;
Figure 5 is a side view of the bracket of the housing shown in Figure 4;
Figure 6 is a side view of the bracket of the housing shown in Figure 4;
7 is an enlarged view of a protrusion;
FIG. 8 is an enlarged view of area A of FIG. 1 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Objects, 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. And the terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to explain his/her invention in the best way. Based on the principle that it can be done, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention. And, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a view showing a motor according to an embodiment, and FIG. 2 is an exploded view of the motor shown in FIG. 1 .

1 and 2, the motor according to the embodiment includes a shaft 100, a rotor 200, a stator 300, a cover plate 400, a commutator 500, and a housing 600. can include

Shaft 100 may be coupled to rotor 200 . When electromagnetic interaction occurs between the rotor 200 and the stator 300 through the supply of current, the rotor 200 rotates and the shaft 100 rotates in conjunction therewith. The shaft 100 may transmit power by being connected to a braking device of a vehicle. The braking device of the vehicle may be an anti-lock brake system (ABS).

The rotor 200 is disposed inside the stator 300. The rotor 200 includes a rotor core coupled to the center of the shaft 100 . The rotor 200 may include a plurality of teeth disposed around the rotor core. At this time, the teeth may be arranged to face the stator 300. A coil is wound on each tooth. An insulator is installed on the teeth to insulate the teeth and coil.

The stator 300 is coupled to the inside of the housing 400 and may include a plurality of magnets. The magnet forms a coil wound around the rotor 200 and a rotating magnetic field. These magnets may be disposed such that N poles and S poles are alternately located around the shaft 100 in a circumferential direction. Meanwhile, the stator 300 may be manufactured by combining a plurality of split cores or may be manufactured in the form of a single core.

In order to supply current to the rotating rotor 200, a commutator 500 and a brush (not shown) are required. The commutator 500 is coupled to the shaft 100. Also, the commutator 500 may be disposed above the rotor 200 . And the commutator 500 is electrically connected to the coil of the rotor. Meanwhile, the brush applies current to the coil of the rotor 200 by contacting the commutator 500 .

The cover plate 400 may be disposed above the stator 300 . A brush may be fixed to the cover plate 400 . In addition, a terminal 410 connected to a brush and an external power source and a terminal body 420 supporting the terminal 410 may be disposed on the cover plate 400 . The terminal body 420 may be disposed elongated in the axial direction of the shaft 100 . The cover plate 400 may be made of plastic resin. When external power is connected to the terminal 410 disposed on the cover plate 400, electricity is supplied to the brush through a capacitor disposed on the cover plate 400. The brush supplies electricity to the coil of the rotor 200 via the commutator 500.

The housing 600 accommodates the rotor 200 and the stator 300. Also, the housing 600 may include a body 610 and a bracket 620. The body 610 is a cylindrical metal member and may have an open top. The bracket 620 covers the open top of the body 610. Bracket 620 is also a metal material. The bracket 620 may be fitted and coupled to the top of the body 610.

3 is a view showing a first groove disposed in the body of the housing.

Referring to FIGS. 2 and 3 , the body 610 of the housing 600 may include a flange 611 . The flange 611 may extend outward from the upper end of the housing 600 and may be disposed. The flange 611 has a first groove 612 disposed thereon. The first groove 612 is concavely disposed on the upper surface of the flange 611 . A protrusion ( 621 in FIG. 4 ) of a bracket ( 620 in FIG. 4 ) is fitted into the first groove 612 .

4 is a view showing a protrusion disposed on a bracket of a housing. 5 is a side view of the bracket of the housing shown in FIG. 4;

2 to 5, the bracket 620 is a disk-shaped member. The bracket 620 may be divided into an inner portion 620A, a stepped portion 620B, and an outer portion 620C. The inner portion 620A is disposed inside the outer portion 620C. Also, the stepped portion 620B connects the inner portion 620A and the outer portion 620C. The outer portion 620C is disposed higher than the inner portion 620A. This outer portion 620C may contact the upper end of the housing 600 .

A protrusion 621 is disposed on an outer circumferential surface of the outer portion 620C. The protrusion 621 fits into the first groove 612 . When the protrusion 621 is fitted into the first groove 612, the bracket 620 is coupled to the body 610. A second groove 622 may be disposed in the protrusion 621 . The second groove 622 may be concavely disposed on the upper surface of the protrusion 621 . The second groove 622 serves as a passage for stress generated when the protrusion 621 is fitted into the first groove 612, and the protrusion 621 of the metal material or the first groove 612 of the metal material It serves to prevent chips from occurring. Although the second groove 622 is illustrated as being concavely disposed on the upper surface of the projection 621, the present invention is not limited thereto, and the second groove 622 is concavely disposed on the lower surface of the projection 621. It is free to be

Meanwhile, a concave-convex portion 623 may be disposed on an outer surface of the protrusion 621 . The empty space of the uneven portion 623 induces the protrusion 621 to more easily fit into the first groove 612 . Also, the concave-convex portion 623 is to increase the bonding force between the protrusion 621 and the first groove 612 .

A coupling protrusion 626 may be disposed on the lower surface of the inner portion 620A in a downward protruding form. The coupling protrusion 626 is inserted into the coupling hole 430 disposed in the cover plate 400 .

A pocket portion 624 may be disposed on an upper surface of the inner portion 620A. The pocket portion 624 is disposed at the center of the upper surface of the inner portion 620A, and forms a hole therein. A bearing may be accommodated in the pocket portion 624 .

A through hole 625 may be disposed on an upper surface of the inner portion 620A. The body of the terminal 420 of the cover plate 400 passes through the through hole 625 .

Figure 6 is a side view of the bracket of the housing shown in Figure 4;

Referring to FIG. 6 , a plurality of protrusions 621 may be disposed along the circumferential direction of the bracket 620 . When the reference line passing through the center of width of the protrusion 621 and the center C of the bracket 620 is referred to as L in FIG. 621) may be disposed respectively. A plurality of second grooves 622 may also be disposed along the circumferential direction of the bracket 620 . The reference line L may pass through the center of the width of the second groove 622 . And, the second groove 622 may have a symmetrical shape with respect to the reference line (L). In addition, the concavo-convex portion 623 may be arranged symmetrically with respect to the reference line L.

7 is an enlarged view of a protrusion.

Referring to FIG. 7 , the second groove 622 may include a first surface 622a, a second surface 622b, a third surface 622c, and a fourth surface 622d. The first surface 622a corresponds to the outer surface of the protrusion 621 . The second surface 622b and the third surface 622c are connected to both ends of the first surface 622a. The second surface 622b and the third surface 622c are disposed to correspond to the side surfaces of the silver protrusion 621 . The fourth surface 622d is disposed facing the first surface 622a. Both ends of the fourth surface 622d are connected to the second surface 622b and the third surface 622c, respectively. In addition, the fourth surface 622d may be disposed so that the inner circumferential surface H of the fourth surface 622d faces each other.

FIG. 8 is an enlarged view of area A of FIG. 1 .

Referring to FIG. 8 , the first groove 612 may include a side surface 612a, a bottom surface 612b, and an inclined surface 612c. The side surface 612a is in contact with the outer surface of the protrusion 612, and the bottom surface 612b is in contact with the lower surface of the protrusion 612. The inclined surface 612c is connected at the upper end of the side surface 612a to guide the protrusion 621 to be easily inserted into the first groove 612 . Stress is generated when the protrusion 621 is coupled to the first groove 612 . At this time, since the passage of stress is secured through the second groove 622 in the direction shown by the arrow in FIG. can be reduced

In the above, the motor according to one preferred embodiment of the present invention has been examined in detail with reference to the accompanying drawings.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: shaft
200: rotor
300: stator
400: cover plate
410: terminal
420: terminal body
500: commutator
600: housing
610: body
612 first groove
620: bracket
621: projection
622 second groove
623: uneven part

Claims (10)

shaft;
a rotor including a hole in which the shaft is disposed;
A stator disposed outside the rotor, and
A housing accommodating the rotor and the stator,
the housing,
body;
Includes a bracket disposed on one side of the body,
The body includes a first groove concavely disposed on an inner circumferential surface,
The bracket includes a protrusion protruding in a radial direction from an outer circumferential surface and fitting with the first groove,
The protrusion includes a second groove concavely disposed on at least one of an upper surface and a lower surface of the protrusion,
The second groove includes a first surface and a second surface and a third surface respectively connected to both ends of the first surface,
The first surface is disposed to correspond to an outer surface of the protrusion, and the second and third surfaces are respectively disposed to correspond to side surfaces of the protrusion. According to claim 1,
The body includes a flange extending outward in a radial direction from an upper end of the body,
The first groove is a motor disposed on the flange. According to claim 1,
A motor in which a concave-convex portion is disposed on an outer surface of the protrusion. delete According to claim 1,
The second groove is connected to the second surface and the third surface, is disposed facing the first surface, and is disposed corresponding to the inner circumferential surface of the bracket. According to claim 1,
The bracket includes an outer portion contacting the body, an inner portion disposed inside the outer portion, and a stepped portion connecting the outer portion and the inner portion. According to claim 6,
The first groove is disposed across the protrusion and the outer portion of the motor. According to claim 1,
Further comprising a cover plate disposed below the bracket,
The bracket includes a coupling protrusion formed by protruding downward from the lower surface of the bracket,
The cover plate includes a coupling hole formed to penetrate in an axial direction corresponding to a position of the coupling protrusion,
The coupling protrusion is a motor disposed inside the coupling hole. According to claim 3,
The concave-convex portion is disposed symmetrically with respect to a reference line passing through a center of width of the protrusion and a center of the bracket. According to claim 1,
The second groove is disposed symmetrically with respect to a reference line passing through a center of width of the protrusion and a center of the bracket.

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