KR102013851B1

KR102013851B1 - Motor

Info

Publication number: KR102013851B1
Application number: KR1020120147302A
Authority: KR
Inventors: 안광석
Original assignee: 엘지이노텍 주식회사
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2019-08-23
Also published as: KR20140078792A

Abstract

An electric motor is started. The electric motor has a rotor having a rotating shaft; A stator in which the rotor is rotatably received; And an upper bearing accommodating part accommodating an upper bearing accommodating part accommodating an upper bearing accommodating the upper bearing accommodating part and an upper bearing accommodating part, and pressing the upper bearing downward to press the upper bearing downward. And an upper housing mold comprising protrusions.

Description

Electric motor

The present invention relates to an electric motor, and more particularly , to an electric motor that simplifies the assembly process.

Electric motors are widely used in various industrial fields as devices for converting electrical energy into mechanical energy.

Such a motor is a device for providing power, and is used in various fields such as an electric bicycle, a compressor, and a vehicle brake system.

In general, the motor includes a housing including an upper and lower cases, a stator accommodated in the housing, a rotor rotatably received in the stator, a rotating shaft coupled to the rotor, and a bearing having an outer ring coupled to the housing and an inner ring coupled to the rotating shaft. .

Such an electric motor includes a wave washer in which the rotating shaft is excited in the axial direction of the rotating shaft and pressurizes a bearing as disclosed in Korean Patent Laid-Open Publication No. 10-2012-0094771.

However, the motor disclosed in the above publication has a problem in that the manufacturing cost increases because the assembly process is increased by including the wave washer.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an electric motor in which a manufacturing cost is reduced by eliminating a wave washer and thus reducing an assembly process.

According to one aspect of the invention, a rotor having a rotation axis; A stator in which the rotor is rotatably received; And an upper bearing accommodating part accommodating an upper bearing accommodating part accommodating an upper bearing accommodating the upper bearing accommodating part and an upper bearing accommodating part, and pressing the upper bearing downward to press the upper bearing downward. An electric motor including an upper housing mold including a protrusion is provided.

According to another aspect of the invention, a rotor having a rotating shaft; A stator in which the rotor is rotatably received; A lower bearing pressurizing protrusion for receiving a lower bearing accommodating part for accommodating the stator and a lower bearing fitted to the lower part of the rotating shaft and a material having an elastic force in a lower part of the lower bearing accommodating part to press the lower bearing upward; It provides an electric motor including a lower housing mold comprising a.

According to one embodiment of the present invention, the wave washer can be deleted, the assembly process is reduced, there is an effect that the manufacturing cost is reduced.

1 is a longitudinal sectional view schematically showing an electric motor according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing an electric motor according to an embodiment of the present invention.
3 is an enlarged view of a portion C of FIG. 2.
4 is an enlarged view of a portion A of FIG. 1.
5 is an enlarged view of a portion B of FIG. 1.

As the invention allows for various changes and numerous embodiments, particular 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 ordinal numbers, such as second and first, may be used to describe various components, but the components are not limited by the 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 the first component, and similarly, the first component may also be referred to as the second component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination 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. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

1 is a longitudinal sectional view schematically showing an electric motor according to an embodiment of the present invention.

Referring to FIG. 1, a motor according to an embodiment of the present invention includes a housing 10 including an upper housing mold 11 and a lower housing mold 12, a stator 20 and a stator 20 accommodated in the housing 10. And a rotor 30 rotatably received inside the 20.

The stator 20 includes a stator core 21 having a cylindrical shape, a tooth 22 protruding from the inner surface of the stator core 21 toward the center of the stator 20, a coil 23 wound on the tooth 22, and a tooth. An insulator 24 is interposed between the 22 and the coil 23 to insulate the coil 23 from the tooth 22.

The rotor 30 includes a rotor core 32, a rotating shaft 31 press-fitted to the rotor core 32, and a magnet 32 attached to an outer circumferential surface of the rotor core 32.

Upper and lower bearings 34 and 35 (see FIGS. 4 and 5) are fitted to the top and bottom of the rotary shaft 31 to minimize the rotational friction force of the rotary shaft 31.

Figure 2 is a cross-sectional view schematically showing an electric motor according to an embodiment of the present invention, Figure 3 is an enlarged view of C of FIG.

2 and 3, an uneven coupling structure is formed on the outer circumferential surface of the stator 20 and the inner circumferential surface of the housing 10 to allow the stator 20 and the housing 10 to be coupled to each other.

That is, the housing convex structure 12 is formed on the inner circumferential surface of the upper housing mold 11 so that the upper housing mold 11 and the stator 20 are unevenly coupled, and the stator recess is formed on the outer circumferential surface of the stator 20. (Iii) The structure 21 is formed. Accordingly, when the stator 20 enters the housing 10 in the axial direction, the housing convex structure 12 and the stator yaw structure 21 are engaged with each other to thereby engage the stator 20. ) And the housing 10 are combined.

In addition, the housing convex structure 12 is formed larger than the stator yaw structure 21. As a result, when the stator 20 is press-fitted into the upper housing mold 11 and coupled thereto, the coupling thereof is secured.

Furthermore, a protrusion 13 is formed at the end of the housing convex structure 12 to protrude in a direction perpendicular to the protrusion direction, and a protrusion 13 is formed at the bottom of the stator yaw structure 21. A protrusion receiving portion 22 for receiving is formed. This prevents the stator 20 from flowing inside the upper housing mold 11.

And the protrusion receiving portion 22 is formed larger than the protrusion 12. Accordingly, even when the protrusion 12 contracts or expands due to the external environment, the protrusion 12 may be properly accommodated in the protrusion receiving portion 22.

4 is an enlarged view of a portion A of FIG. 1.

Referring to FIG. 4, the upper part of the upper housing mold 11 has a rotating shaft upper through hole 11-1 through which the upper part of the rotating shaft 32 penetrates, and the upper housing mold 11 is formed of the upper bearing 34. The upper support portion 11-4 disposed on the upper side, the upper bearing seating portion 11-2 and the upper support portion 11-4 which are bent at the edges of the upper support portion 11-4 to contact the side surfaces of the upper bearing. And an upper bearing pressing protrusion 11-3 protruding from the lower surface.

The upper bearing seating portion 11-2 is formed with an upper bearing pressing protrusion 11-3 which is integrally molded with the upper housing mold 11 and presses the upper bearing 34 downward with a material having elastic force. do. Thus, the conventional wave washer can be deleted.
At this time, the upper bearing pressing projection (11-3) includes a slope 11-31 and the pressing portion (11-32). The inclined portions 11-31 protrude from the lower surface to form an acute angle with the lower surface of the upper support portion 11-4. In addition, the pressing portion 11-32 extends from one end of the inclined portion 11-31, contacts the upper surface of the upper bearing 34, and is spaced apart from the lower surface of the upper supporting portion 11-4. .

FIG. 5 is an enlarged view of a portion B of FIG. 1.

Referring to FIG. 5, the lower housing mold 12 has a rotating shaft lower through hole 12-1 through which a lower portion of the rotating shaft 32 penetrates, and the lower housing mold 12 is disposed below the lower bearing 35. A lower support portion 12-4 disposed, a lower bearing seating portion 12-2 and a lower support portion 12-4 that are bent at the edges of the lower support portion 12-4 and contact the side surfaces of the lower bearing 35; It includes a lower bearing pressing projection (12-3) protruding from the upper surface of the.

In addition, a lower bearing pressing protrusion 12-3 is formed at the lower portion of the lower bearing seating part 12-2 to be molded integrally with the lower housing mold 12 to press the lower bearing 35 upward. do. Thus, the conventional wave washer can be deleted.
In this case, the lower bearing pressing protrusion 12-3 includes an inclined portion 12-31 and a pressing portion 12-32. The inclined portion 12-31 protrudes from the upper surface to form an acute angle with the upper surface of the lower support portion 12-4. In addition, the pressing portion 12-32 extends from one end of the inclined portion 12-31, contacts the lower surface of the lower bearing 34, and is spaced apart from the upper surface of the lower supporting portion 12-4. .

On the other hand, the upper bearing pressing protrusion (11-3) and the upper housing molding 11, which is a configuration connected to the upper housing mold 11 is formed integrally molded, the lower bearing is a configuration connected to the lower housing mold 12 The pressing protrusion 12-3 is formed integrally with the lower housing mold 12.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

10: housing 11: upper housing mold
11-3: upper bearing pressurization 12: lower housing mold
12-3: Lower bearing presser 20: Stator
30: rotor 40: concave-convex coupling structure

Claims

delete

Rotation axis;
A rotor coupled with the rotation shaft;
A stator disposed outside the rotor;
An upper bearing and a lower bearing coupled to the rotating shaft; And
An upper housing mold and a lower housing mold for receiving the stator and the rotor,
The upper housing mold has an upper support portion disposed above the upper bearing, an upper bearing seat portion bent at an edge of the upper support portion to contact the side surface of the upper bearing, and an upper bearing pressing protrusion protruding from a lower surface of the upper support portion. Including,
The lower housing mold may include a lower support portion disposed below the lower bearing, a lower bearing seat portion bent at an edge of the lower support portion to contact a side surface of the lower bearing, and a lower bearing pressing protrusion protruding from an upper surface of the lower support portion. Including,
The upper bearing pressing protrusion includes an inclined portion protruding from the lower surface and a pressing portion extending from one end of the inclined portion to form an acute angle with the lower surface of the upper support portion.
The lower bearing pressing protrusion includes an inclined portion protruding from the upper surface and a pressing portion extending from one end of the inclined portion to form an acute angle with the upper surface of the lower support portion.
The pressing portion of the upper bearing pressing projection is formed in contact with the upper surface of the upper bearing, spaced apart from the lower surface of the upper support portion,
The pressurizing portion of the lower bearing pressing projection is in contact with the lower surface of the lower bearing, the motor is formed spaced apart from the upper surface of the support of the lower housing.