KR20020005925A - Oil leakage protection structure for spindle motor - Google Patents

Oil leakage protection structure for spindle motor Download PDF

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Publication number
KR20020005925A
KR20020005925A KR1020000039475A KR20000039475A KR20020005925A KR 20020005925 A KR20020005925 A KR 20020005925A KR 1020000039475 A KR1020000039475 A KR 1020000039475A KR 20000039475 A KR20000039475 A KR 20000039475A KR 20020005925 A KR20020005925 A KR 20020005925A
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KR
South Korea
Prior art keywords
oil
spindle motor
inclined surface
rotating shaft
bearing
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KR1020000039475A
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Korean (ko)
Inventor
최태영
Original Assignee
이형도
삼성전기주식회사
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Priority to KR1020000039475A priority Critical patent/KR20020005925A/en
Publication of KR20020005925A publication Critical patent/KR20020005925A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

PURPOSE: An oil leakage protection structure for a spindle motor is provided to accurately control the amount of oil by forming a boundary surface for preventing the leakage of oil injected for the lubrication of the spindle motor. CONSTITUTION: A slope surface(1) inclined toward a rotating shaft is formed on a top surface of a bearing on which end of filled oil is positioned. A groove(2) is formed on a bottom surface of a rotor corresponding to the slope surface(1). A fluorine coating film(3) is formed on the slope surface(1). The surface tension of the oil is increased by the fluorine coating film(3), thereby preventing the leakage of the oil. The length of the slope surface(1) is longer than that of the groove(2) so that oil scattered toward the groove(2) can be dropped on the slope surface(1).

Description

스핀들 모터의 오일 누출 방지 구조{Oil leakage protection structure for spindle motor}Oil leakage protection structure for spindle motor

본 발명은 스핀들 모터에 관한 것으로서, 보다 상세하게는 CD-ROM등과 같은 장치에서 사용되는 스핀들 모터에서 회전 윤활을 위해 사용되는 오일의 유출을 방지할 수 있는 스핀들 모터의 오일 누출 방지 구조에 관한 것이다.The present invention relates to a spindle motor, and more particularly to an oil leakage prevention structure of the spindle motor that can prevent the leakage of oil used for rotational lubrication in the spindle motor used in the device, such as CD-ROM.

일반적으로, CD-ROM 드라이브등과 같이 고속 회전을 하는 장치에는 통상적으로 스핀들 모터가 많이 사용된다.In general, a spindle motor is generally used in a device that rotates at a high speed, such as a CD-ROM drive.

상기한 스핀들 모터는 도 2에 도시된 바와 같이 스테이터(50)가 설치된 하우징(51)과, 상기한 하우징(51)에 메탈 베어링등을 통해 결합된 회전축(52)과, 상기한 회전축(52)에 결합되어 연동 회전하고 마그네트가 설치된 로우터(53)와, 상기한 하우징(51)에 결합됨과 아울러 PCB 기판이 설치된 플레이트(54)로 구성되어 있다.As shown in FIG. 2, the spindle motor includes a housing 51 in which the stator 50 is installed, a rotating shaft 52 coupled to the housing 51 through a metal bearing, and the rotating shaft 52. It is composed of a rotor (53) coupled to the rotation and coupled to the magnet, and the plate (54), which is coupled to the housing (51) and is equipped with a PCB substrate.

또한, 상기한 회전축(52)을 고정시키기 위하여, 하우징(51)의 개구부에서 회전축(52)에 와셔를 개재하여 밀착된 써포터(55)와, 상기한 써포터(55)를 하우징(51)에 고정하는 UV 본드(56)로 구성되어 있다.In addition, in order to fix the rotation shaft 52, the supporter 55 closely attached to the rotation shaft 52 via a washer at the opening of the housing 51 and the supporter 55 is fixed to the housing 51. UV bond 56 is composed of.

여기서, 상기한 회전축(52)과 베어링과의 사이에는 오일이 충진되어 회전 시 윤활 작용을 하게 되는 바, 즉, 회전할 때 발생되는 압력 및 유막에 의해 회전체가 회전 지지되는 것이다.Here, the oil is filled between the rotating shaft 52 and the bearing to lubricate when rotating, that is, the rotating body is rotated by the pressure and the oil film generated when rotating.

그래서, 상기한 오일이 외부로 비산되거나 누출되지 않도록, 오일의 통로를 복잡하게 하거나, 표면 장력등을 이용한 방법을 사용하게 된다.Therefore, the oil passage is complicated or surface tension is used so that the oil does not scatter or leak to the outside.

그러나, 상기한 바와 같이 오일의 누출 및 비산 방지를 위해 오일 통로를 복잡하게 하거나 표면장력을 이용하게 되면, 상기한 오일을 주입할 때 오일의 양을 정확하게 제어함과 아울러 과다 주입된 오일을 제거할 때 오일의 경계면이 정확하지 않기 때문에, 오일의 관리가 어렵게 되는 문제점이 있다.However, as described above, when the oil passage is complicated or surface tension is used to prevent oil leakage and scattering, it is possible to precisely control the amount of oil when the oil is injected and to remove the excess oil. When the interface of the oil is not accurate, there is a problem that the management of the oil is difficult.

즉, 상기한 오일의 주입량이 정확하게 관리되지 않게 되면, 모터의 전류에 절대적인 영향을 주는 오일량 부정확으로 인해 모터의 품질 저하가 발생되는 문제점이 있는 것이다.That is, if the injection amount of the oil is not managed correctly, there is a problem that the quality of the motor is deteriorated due to the oil amount inaccuracy which has an absolute effect on the current of the motor.

따라서, 본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로서, 스핀들 모터의 윤활을 위해 주입되는 오일의 양이 외부로 누출되지 않도록 경계면을 형성함으로써, 오일량의 정확한 관리가 이루어지는 스핀들 모터의 오일 누출 방지 구조를 제공함에 있다.Accordingly, an object of the present invention is to solve the above problems, by forming an interface so that the amount of oil injected for lubrication of the spindle motor is not leaked to the outside, the oil leakage of the spindle motor is made precise management of the oil amount It is to provide a prevention structure.

상기한 목적을 실현하기 위하여 본 발명은 회전축과 베어링 사이의 미세 공간에 오일을 충진하여 구성한 스핀들 모터의 오일 누출 방지 구조에 있어서,In order to achieve the above object, the present invention provides an oil leakage preventing structure of a spindle motor configured by filling oil in a microcavity between a rotating shaft and a bearing.

상기한 오일의 상단부가 위치되는 부분인 베어링 상면에 회전축측으로 기울어지도록 형성된 경사면과, 이와 대응되는 부분인 로우터 저면에 형성된 수납홈을 포함함을 특징으로 한다.It characterized in that it comprises an inclined surface formed to be inclined toward the rotation axis side on the bearing upper surface is a portion where the upper end portion of the oil is located, and a receiving groove formed on the lower surface of the rotor corresponding to the oil.

도 1은 본 발명에 따른 스핀들 모터의 오일 누출 방지 구조를 도시한 부분 확대 단면도,1 is a partially enlarged cross-sectional view showing an oil leakage preventing structure of a spindle motor according to the present invention;

도 2는 일반적인 스핀들 모터의 하우징과 써포터 고정 구조를 도시한 반단면도.Figure 2 is a half cross-sectional view showing a housing and supporter fixing structure of a typical spindle motor.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 경사면 2 : 수납홈1: inclined surface 2: storage groove

3 : 불소 코팅막 52 : 회전축3: fluorine coating film 52: rotating shaft

B : 베어링 53 : 로우터B: bearing 53: rotor

도 1은 본 발명에 스핀들 모터의 오일 누출 방지 구조를 도시한 부분 확대 단면도로서, 충진된 오일의 단부가 위치되는 부분인 베어링 상면에 회전축(52)측으로 기울어진 경사면(1)이 형성되어 있고, 이와 대응되는 부분인 로우터(53) 저면에 수납홈(2)이 형성되어 있으며, 상기한 경사면(1)의 표면에 불소 코팅막(3)이 형성되어 있다.1 is a partially enlarged cross-sectional view showing the oil leakage prevention structure of the spindle motor in the present invention, the inclined surface (1) is inclined toward the rotating shaft 52 side is formed on the bearing upper surface which is a portion where the end of the filled oil is located, An accommodating groove 2 is formed in a lower surface of the rotor 53, which is a corresponding portion thereof, and a fluorine coating film 3 is formed on the surface of the inclined surface 1.

상기한 불소 코팅막(3)은 오일의 표면 장력을 크게 하여, 오일이 흘러나가지 않도록 하는 것이다.The fluorine coating film 3 increases the surface tension of the oil so that the oil does not flow out.

특히, 상기한 수납홈(2)에 비산된 오일이 경사면(1)으로 낙하되도록 경사면(1)의 길이가 수납홈(2)의 길이보다 길게 형성되어 있다.In particular, the length of the inclined surface 1 is formed longer than the length of the storage groove 2 so that the oil scattered in the storage groove (2) falls on the inclined surface (1).

또한, 상기한 모터에 충진되는 오일의 양에 따라 상기한 경사면(1)의 깊이를 조절하면 상기한 오일이 경사면(1)에 낙하 또는 저장될 때 외부로 누출되는 것을 최대한 방지하게 된다.In addition, if the depth of the inclined surface 1 is adjusted according to the amount of oil filled in the motor, the oil is prevented from leaking to the outside when falling or stored in the inclined surface 1 as much as possible.

상기한 바와 같은 본 발명의 작용 효과를 설명하면 모터 조립 후, 진공 주입법등을 통해 오일을 베어링(B)과 회전축(52) 사이에 주입하게 된다.Referring to the operation and effect of the present invention as described above, after the motor assembly, the oil is injected between the bearing (B) and the rotating shaft 52 through a vacuum injection method.

베어링(B)과 회전축(52) 사이에 오일이 주입된 상태에서, 상기한 모터가 동작하면 상기한 오일이 윤활 작용을 함과 아울러 압력에 의해 비산하게 된다.In the state in which oil is injected between the bearing B and the rotating shaft 52, when the motor operates, the oil is lubricated and scattered by pressure.

오일이 비산하게 되면, 상기한 수납홈(2)으로 비산하게 되고, 상기한 수납홈(2)에 비산된 오일은 수납홈(2)에 저장되는 바, 상기한 오일의 양이 일정량 이상되면 낙하하게 된다.When the oil is scattered, it is scattered to the storage groove (2), the oil scattered in the storage groove (2) is stored in the storage groove (2), when the amount of the oil falls more than a predetermined amount falls Done.

오일이 낙하하게 되면, 상기한 경사면(1)으로 낙하하게 되고, 상기한 경사면(1)의 불소 코팅막(3)에 의해 오일이 경사면(1)을 넘어가지 않게 된다.When the oil falls, the oil drops on the inclined surface 1, and the oil does not cross the inclined surface 1 by the fluorine coating film 3 of the inclined surface 1.

즉, 상기한 불소 코팅막(3)은 일반적인 금속에 비해 표면 장력이 크기 때문에, 상기한 오일이 외부로 이동하다가 불소 코팅막(3)에서 정지하게 됨으로써, 경사면(1)을 타고 넘어가지 않게 되는 것이다.That is, since the fluorine coating film 3 has a larger surface tension than the general metal, the oil moves to the outside and stops at the fluorine coating film 3, so that the fluorine coating film 3 does not cross the inclined surface 1.

오일이 경사면(1)을 타고 넘어가지 않게 되면, 상기한 오일이 경사면(1)을 따라 흘러 내리게 되고, 상기한 오일은 다시 베어링(B)과 회전축(52)의 사이에 저장되면서 윤활 작용을 하게 되는 것이다.When the oil does not pass on the inclined surface (1), the oil flows down the inclined surface (1), the oil is stored between the bearing (B) and the rotating shaft 52 to lubricate Will be.

또한, 상기한 모터의 회전축(52)과 베어링(b)에 오일을 주입할 때, 과량의 오일이 주입되면 불소 코팅막(3) 외부까지만 제거하면 정확하게 오일의 양을 조절할 수 있게 된다.In addition, when the oil is injected into the rotating shaft 52 and the bearing (b) of the motor, if the excess oil is injected, only the outer portion of the fluorine coating film 3 can be removed to accurately adjust the amount of oil.

즉, 상기한 불소 코팅막(3)이 오일의 경계면 역할을 하는 바, 이 부분(경사면)까지만 오일을 제거하면 정확한 오일의 양을 조절할 수 있는 것이다.That is, the fluorine coating film 3 serves as an interface of oil, and if only oil is removed up to this portion (inclined surface), the correct amount of oil can be adjusted.

또한, 외부 이물질등이 오일로 유입되려고 하면, 상기한 경사면(2)에 걸리게 됨으로써, 이물질 유입량을 감소시킬 수 있게 된다.In addition, when an external foreign matter or the like is to be introduced into the oil, it is caught by the inclined surface (2), it is possible to reduce the foreign matter inflow amount.

이상과 같이 본 발명은 회전축과 베어링의 사이에 충진되는 오일의 상단 경계면 부분에, 로우터와 베어링에 대향 형성된 수납홈 및 경사면을 형성하고, 경사면에 불소 코팅막을 형성함으로써, 오일의 양을 정확하게 조절할 수 있을 뿐만 아니라 이로 인해 모터의 품질을 일정하게 유지할 수 있는 잇점이 있는 것이다.As described above, the present invention forms an accommodating groove and an inclined surface formed opposite to the rotor and the bearing on the upper boundary surface portion of the oil filled between the rotating shaft and the bearing, and forms a fluorine coating film on the inclined surface, thereby precisely adjusting the amount of oil. Not only that, but it also has the advantage of keeping the motor quality constant.

Claims (3)

회전축과 베어링 사이의 미세 공간에 오일을 충진하여 구성한 스핀들 모터의 오일 누출 방지 구조에 있어서,In the oil leakage prevention structure of the spindle motor formed by filling oil in the microcavity between the rotating shaft and the bearing, 상기한 오일의 상단부가 위치되는 부분인 베어링 상면에 회전축측으로 기울어지도록 형성된 경사면과, 이와 대응되는 부분인 로우터 저면에 형성된 수납홈을 포함함을 특징으로 하는 스핀들 모터의 오일 누출 방지 구조.And an inclined surface formed to be inclined toward the rotating shaft side on a bearing upper surface, which is a portion at which the upper end of the oil is located, and a receiving groove formed on a bottom surface of the rotor corresponding to the oil. 제 1 항에 있어서,The method of claim 1, 상기한 경사면의 표면에 오일의 표면 장력을 크게 하여, 오일이 흘러나가지 않도록 불소 코팅막을 도포하여 구성함을 특징으로 하는 스핀들 모터의 오일 누출 방지 구조.The oil leakage preventing structure of the spindle motor, characterized in that the surface tension of the oil is increased to the surface of the inclined surface to apply a fluorine coating film so that the oil does not flow out. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기한 수납홈에 비산된 오일이 경사면으로 낙하되도록 경사면의 길이가 수납홈의 길이보다 길게 형성됨을 특징으로 하는 스핀들 모터의 오일 누출 방지 구조.The oil leakage preventing structure of the spindle motor, characterized in that the length of the inclined surface is formed longer than the length of the accommodating groove so that the oil scattered in the accommodating groove falls on the inclined surface.
KR1020000039475A 2000-07-11 2000-07-11 Oil leakage protection structure for spindle motor KR20020005925A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100970754B1 (en) * 2008-09-22 2010-07-16 삼성전기주식회사 Motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06178488A (en) * 1992-12-02 1994-06-24 Nippon Densan Corp Spindle motor
JPH0746810A (en) * 1993-07-31 1995-02-14 Nippon Densan Corp Spindle motor
KR19990040374A (en) * 1997-11-18 1999-06-05 이형도 Bearing oil sealing structure of spindle motor
JPH11187611A (en) * 1997-12-18 1999-07-09 Seiko Instruments Inc Spindle motor and rotating body device using the motor as driving source of rotating body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06178488A (en) * 1992-12-02 1994-06-24 Nippon Densan Corp Spindle motor
JPH0746810A (en) * 1993-07-31 1995-02-14 Nippon Densan Corp Spindle motor
KR19990040374A (en) * 1997-11-18 1999-06-05 이형도 Bearing oil sealing structure of spindle motor
JPH11187611A (en) * 1997-12-18 1999-07-09 Seiko Instruments Inc Spindle motor and rotating body device using the motor as driving source of rotating body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100970754B1 (en) * 2008-09-22 2010-07-16 삼성전기주식회사 Motor

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