KR20170050147A - built-in moter for reducing thermal deformation - Google Patents

built-in moter for reducing thermal deformation Download PDF

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Publication number
KR20170050147A
KR20170050147A KR1020150151300A KR20150151300A KR20170050147A KR 20170050147 A KR20170050147 A KR 20170050147A KR 1020150151300 A KR1020150151300 A KR 1020150151300A KR 20150151300 A KR20150151300 A KR 20150151300A KR 20170050147 A KR20170050147 A KR 20170050147A
Authority
KR
South Korea
Prior art keywords
built
stator
motor
rotor
housing
Prior art date
Application number
KR1020150151300A
Other languages
Korean (ko)
Inventor
조영기
Original Assignee
현대위아 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대위아 주식회사 filed Critical 현대위아 주식회사
Priority to KR1020150151300A priority Critical patent/KR20170050147A/en
Publication of KR20170050147A publication Critical patent/KR20170050147A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Turning (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in motor, and more particularly, to a built-in motor that increases a cross-sectional area for heat transfer between a stator surrounding a rotor and a housing, To a built-in motor.

Description

[0001] The present invention relates to a built-in motor for reducing thermal displacement,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in motor, and more particularly, to a built-in motor that increases a cross-sectional area for heat transfer between a stator surrounding a rotor and a housing, To a built-in motor.

The machine tool is equipped with a tool on the spindle to be machined.

Generally, the main shaft for rotating the tool is rotated by a motor, and a built-in motor is used for rotating the tool about 20,000 rpm or more.

FIG. 1 is a view showing a conventional built-in motor. The conventional built-in motor includes a housing 14 and a rotor 14 which is provided inside the housing 14 and connected to the main shaft 11 to rotate, (13).

Since the conventional built-in motor is rotated at high speed rpm, deformation may occur due to generation of heat of the rotor. To prevent this, a cooling water pipe is formed inside or outside the housing to cool the heat generated in the rotor.

However, the heat dissipating structure of the conventional built-in motor can not adequately cool the heat generated from the rotor, causing the displacement of the main shaft, resulting in a problem that the quality of the workpiece is deteriorated.

SUMMARY OF THE INVENTION The present invention has been conceived to solve such a problem, and it is an object of the present invention to increase the cross-sectional area for heat transfer between the stator and the housing surrounding the rotor to minimize the thermal displacement of the main shaft due to heat generated in the rotor And to provide a built-in motor for reducing thermal displacement.

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

According to an aspect of the present invention, there is provided a built-in motor for rotating a main shaft of a machine tool, comprising: a cylindrical rotor connected to and rotating with a main shaft; A stator which surrounds the outside of the rotor in a cylindrical shape and rotates the rotor; A plurality of recesses are formed along an outer circumference of the outer surface of the stator, and a groove portion corresponding to the recess is formed on the inner side of the housing, And a cross-sectional area for transmitting heat is increased.

In a preferred embodiment, the recess is a thread, and the groove of the housing is a thread that enables the stator to be rotated while being fastened.

In a preferred embodiment, the recess is integrally formed with the stator.

The present invention also provides a main shaft of a machine tool equipped with a built-in motor according to the present invention.

The present invention further provides a machine tool apparatus having a main shaft according to the present invention and for machining a workpiece with a machining tool for the main shaft.

The present invention has the following excellent effects.

According to the built-in motor for reducing thermal displacement of the present invention, a plurality of recessed portions are formed on the outer surface of the stator, and a groove portion corresponding to the recessed portion is formed on the inner side of the housing, So that the thermal displacement of the main shaft due to the heat generated in the rotor can be minimized.

In addition, according to the built-in motor for reducing thermal displacement of the present invention, the concave portion of the stator is formed by a thread, and the groove portion is formed by a threaded screw that allows the thread to be fastened, thereby increasing the fastening force between the stator and the housing There is an effect that can be made.

1 is a view showing a conventional built-in motor.
2 is a cross-sectional view illustrating a built-in motor according to an embodiment of the present invention.
3 is a view showing a stator of a built-in motor according to an embodiment of the present invention.
4 is a view showing a housing of a built-in motor according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

2 to 4, a built-in motor according to an embodiment of the present invention includes a rotor 110, a stator 120, and a housing 130 as a motor for rotating the main shaft 11.

The rotor 110 is connected to the main shaft 11 in a cylindrical shape and rotates.

The stator 120 has a cylindrical shape and surrounds the rotor 110, and is a stator for rotating the rotor 110.

A plurality of recesses 121 are formed on the outer surface of the stator 120 along the outer circumference.

The concave portions 121 may be formed integrally with the stator 120.

The housing 130 receives and supports the rotor 110 and the stator 120 on the inner side.

In addition, a groove 131 corresponding to the concave portions 121 is formed on the inner side of the housing 130.

That is, since the housing 130 and the stator 120 are coupled to each other by groove, the contact area is increased, which means that the heat transfer area is increased.

Accordingly, since the heat generated in the rotor 110 can be more transmitted to the housing 130 through the stator 120, heat dissipation is increased, and the thermal displacement of the main shaft can be minimized.

In the built-in motor for reducing thermal displacement according to an embodiment of the present invention, the concave portion 121 of the stator 120 is formed by a thread and the groove portion 131 of the housing 130 is formed by the stator 120 And can be formed as a threaded screw that can be fastened while rotating.

This is to increase the contact area between the stator 120 and the housing 130 and improve the assembling performance by increasing the fastening force.

The present invention further provides a main shaft of a machine tool equipped with the built-in motor according to the present invention.

The present invention further provides a machine tool device for machining a workpiece with a machining tool fastened to the main spindle, wherein the machine tool main spindle according to the present invention is provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

110: Rotor
120:
121: lumbar
130: housing
131: Groove

Claims (5)

A built-in motor for rotating a main shaft of a machine tool device,
A cylindrical rotor connected to the main shaft and rotated;
A stator which surrounds the outside of the rotor in a cylindrical shape and rotates the rotor; And
And a housing for accommodating the stator inside,
Wherein a plurality of recesses are formed along the outer circumference of the stator and a groove portion corresponding to the recess is formed on the inner side of the housing to increase a cross-sectional area for transmitting heat generated in the rotor. Built-in motor for displacement reduction.
The method according to claim 1,
Wherein the recess is a thread,
Wherein the groove portion of the housing is a threaded screw that allows the stator to be fastened while rotating.
3. The method of claim 2,
The recess
Wherein the stator is integrally formed with the stator.
A spindle of a machine tool having a built-in motor according to any one of claims 1 to 3.
A machine tool device according to claim 4, wherein the main shaft is provided, and the workpiece is machined by the machining tool of the main shaft.
KR1020150151300A 2015-10-29 2015-10-29 built-in moter for reducing thermal deformation KR20170050147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150151300A KR20170050147A (en) 2015-10-29 2015-10-29 built-in moter for reducing thermal deformation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150151300A KR20170050147A (en) 2015-10-29 2015-10-29 built-in moter for reducing thermal deformation

Publications (1)

Publication Number Publication Date
KR20170050147A true KR20170050147A (en) 2017-05-11

Family

ID=58741294

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150151300A KR20170050147A (en) 2015-10-29 2015-10-29 built-in moter for reducing thermal deformation

Country Status (1)

Country Link
KR (1) KR20170050147A (en)

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