KR20150090692A - Motor - Google Patents

Abstract

The present invention provides a motor including: a stator; a rotor tube disposed inside the stator; a rotor core assembly coupled to an outer circumferential surface of the rotor tube; a shaft coupled to the inside of the rotor tube; a bearing supporting the rotor tube to be rotatable; a housing which has the stator fixed to the inside thereof, and includes the bearing so that the bottom surface of the bearing can be exposed; and a cover unit screw-coupled to the housing to come in contact with the bottom surface of the bearing and the bottom surface of the housing. Therefore, the present invention provides advantageous effects of reducing the weight of the motor, and a manufacturing process and costs required therefor by reducing the configuration of components for supporting an axial load and water proofing, and simplifying a structure.

Description

Motor {Motor}

The present invention relates to a motor, and more particularly, to a motor including a bearing.

A motor is a device that converts electrical energy into rotational energy using the force that a conductor receives in a magnetic field. Recently, as the use of motors has expanded, the role of the motor has become important. Particularly, as the electric field of automobiles rapidly advances, the demand of motors applied to steering systems, braking systems, and design systems is greatly increasing.

Particularly, an external force is added to the motor in the axial direction. Therefore, motors in which rotors are combined with bearings and washers that support an axial load such as an angular bearing have been proposed.

Generally, 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, wherein a stator is installed with a gap along the circumference of the rotor. And a coil for forming a rotating magnetic field is wound around the stator to induce electrical interaction with the rotor to induce rotation of the rotor. When the rotor rotates, the shaft rotates to generate or assist the braking force and the steering force.

On the other hand, since the rotor may vibrate under the condition that the motor receives the axial direction, a bearing for rotatably supporting the shaft may be provided. A separate part, such as a washer stopper, may be required to support the bearing. A coupling member such as a bolt for fixing these components may also be added. And a sealing cover can be added for waterproofing.

However, the motor of such a structure has a problem that the manufacturing process and manufacturing cost are increased because of a large number of parts. Further, since the axial load is directly transmitted to the sealing cover, there is a great risk of causing waterproofing problems. Particularly, since the number of parts is large, there is a fatal problem that the load of the motor as a whole increases.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a motor capable of reducing the weight of the motor, the manufacturing process, and the manufacturing cost by simplifying the structure of parts for supporting and water- .

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

In accordance with one aspect of the present invention, there is provided a stator comprising: a stator; a rotor tube disposed inside the stator; a rotor core assembly coupled to an outer circumferential surface of the rotor tube; a shaft coupled to the rotor tube; A housing including the bearing so that the stator is fixed to the inside and the lower surface of the bearing is exposed, and a cover portion which is screwed to the housing so as to abut the lower surface of the housing and the lower surface of the housing The motor can be provided.

Preferably, a first step region formed on a lower surface of the housing and surrounding a lower portion of the bay ring and having threads on an outer circumferential surface thereof may be included.

Preferably, the cover portion may include a second stepped region having an inner circumferential surface threaded to be screwed with the first stepped region.

Preferably, an adhesive may be applied to the screw engagement regions of the first step region and the second step region.

Preferably, the cover portion may include a third step region that is different in diameter from the second step region.

Preferably, the first step between the second stepped region and the third stepped region can support the lower surface of the first stepped region and the lower surface of the bearing.

Preferably, the cover portion may include a second step extending in a radial direction from an upper end of the second stepped region to abut the lower surface of the housing.

According to an embodiment of the present invention, the bearing is exposed at the lower surface of the housing, and the cover portion supports the lower surface of the exposed bearing and the lower surface of the housing together. Thus, Thereby reducing the weight of the motor, the manufacturing process, and the manufacturing cost.

1 shows a motor according to a preferred embodiment of the present invention,
FIG. 2 is an exploded perspective view of the cover shown in FIG. 1,
3 is an enlarged cross-sectional view showing a coupling relationship between the cover portion and the lower surface of the housing shown in Fig.

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.

FIG. 1 is an exploded perspective view illustrating a motor according to a preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the cover shown in FIG. 1, FIG. 3 is an enlarged cross-sectional view showing the coupling relationship of the lower surface.

1 to 3 clearly show only the main feature parts in order to clearly understand the present invention, and as a result various variations of the illustration are expected, and the scope of the present invention is not limited by the specific shapes shown in the drawings Need not be limited.

Referring to FIG. 1, a motor 10 according to an embodiment of the present invention includes a stator 110, a rotor tube 120, a rotor core assembly 130, a shaft 140, A housing 150, a housing 160, and a cover 170.

A rotor tube 120 is disposed inside the stator 110 and a rotor core assembly 130 is coupled to an outer circumferential surface of the rotor tube 120. The rotor core assembly 130 may be formed by coupling a rotor core and a mold for fixing the magnets. The shaft 140 may be coupled to the inside of the rotor tube 120 in a press fitting manner. The rotor tube 120 is press-fitted with a fixing block 20 having a threaded inside and the shaft 140 can be screwed to the fixing block 20. The bearing 150 may be coupled to the outer circumferential surface of the lower portion of the rotor tube 120. The bearing 150 rotatably supports the rotor tube 120 and supports the axial load. Meanwhile, the stator 110 may be fixed to the housing 160. 3, a bush adapter 1 may be coupled to an end of the shaft 140, and the bush adapter 1 may be coupled by a bolt 2. [

1 to 3, the housing 160 may include a bearing 150 to expose a bottom surface 151 of the bearing 150. [ The bearing 150 may protrude from the housing 160 such that the lower surface of the bearing 150 (151 in FIG. 3) is positioned below the lower surface of the housing 160 (162 in FIG. 3). The bush adapter 1 for supporting the bearing 150 and the bolt 2 for coupling the bush adapter to the shaft 140 are also protruded under the lower surface 162 of the housing 160 .

At this time, the lower surface 162 of the housing 160 may include a first stepped region 161 that surrounds and supports the lower portion of the protruded bearing 150. Here, the first stepped region 161 extends from the lower surface of the housing 160, and may be a part of the housing 160, which may be separately described according to its functional characteristics. The lower end 161a of the first step region 161 and the lower surface 151 of the bearing 150 may be continuously formed.

As a result. The bottom of the housing 160 includes a central region formed by the lower end 161a of the first step region 161 and a lower surface 151 of the bearing 150 and a lower surface 162 formed to be stepped around the central region. Can be.

The cover portion 170 is engaged with the lower surface 162 of the housing 160 to support the lower end 151 of the outer ring of the bearing 150 and the lower end 161a of the first stepped region 161, . The cover portion 170 may be formed in the shape of a stepped cylindrical lid covering the bottom of the housing 160.

Specifically, the cover portion 170 may include a second stepped region 171 and a third stepped region 172 having different diameters. The second step region 171 may be formed to abut the first step region 161 of the housing 160. The third step region 172 may be formed to include the bush adapter 1 therein.

A first step 173 is formed between the second step region 171 and the third step region 172. The first step 173 is formed between the lower end 151 of the bearing 150 and the first step region 173, (161a) of the motor (161) directly to increase the support strength of the motor (10) during the axle load.

Meanwhile, the second step region 171 of the cover portion 170 may include the second step 174. The second step 174 may extend radially from the upper end of the second step region 171 to be in contact with the lower surface 162 of the housing 160.

The first step area 161 and the second step area 171 may be screwed together. For this, a thread is formed on the outer circumferential surface of the first step region 161 and a thread may be formed on the inner circumferential surface of the second step region 171. The first stepped region 161 and the second stepped region 171 are prevented from being unscrewed by applying an adhesive to the screwed regions of the first stepped region 161 and the second stepped region 171, 160 can be prevented.

The second stepped region 171 of the cover portion 170 and the third stepped region 172 described above and the first step 173 and the second step 174 are classified according to their shapes and functional characteristics And may be one means connected to each other.

As described above, the motor according to one preferred embodiment of the present invention has been specifically described 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.

110:
120: Rotor tube
130: rotor core assembly
140: shaft
150: Bearings
151: When you
160: Housing
161: first step region
161a:
162: When
170:
171: Second step region
172: third step region
173: 1st step
174: 2nd step

Claims (7)

Stator;
A rotor tube disposed inside the stator;
A rotor core assembly coupled to an outer circumferential surface of the rotor tube;
A shaft coupled to the inside of the rotor tube;
A bearing rotatably supporting the rotor tube;
A housing including the bearing such that the stator is fixed inside and the lower surface of the bearing is exposed;
And a cover portion screw-engaged with the housing so as to abut the lower surface of the bearing and the lower surface of the housing,
/ RTI > The method according to claim 1,
And a first stepped region formed on a lower surface of the housing and surrounding a lower portion of the bay ring and having threads formed on an outer circumferential surface thereof. 3. The method of claim 2,
And the cover portion includes a second stepped region having an inner peripheral surface threaded to be screwed with the first stepped region. The method of claim 3,
And an adhesive is applied to the screw engagement regions of the first step region and the second step region. The method of claim 3,
Wherein the cover portion includes a third step region that is different in diameter from the second step region. 6. The method of claim 5,
And the first step between the second step region and the third step region supports the lower surface of the first step region and the lower surface of the bearing. 6. The method of claim 5,
Wherein the cover portion includes a second step extending radially from the upper end of the second step region to abut the lower surface of the housing.

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