KR20090096079A - Spindle motor - Google Patents

Spindle motor Download PDF

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Publication number
KR20090096079A
KR20090096079A KR1020080021436A KR20080021436A KR20090096079A KR 20090096079 A KR20090096079 A KR 20090096079A KR 1020080021436 A KR1020080021436 A KR 1020080021436A KR 20080021436 A KR20080021436 A KR 20080021436A KR 20090096079 A KR20090096079 A KR 20090096079A
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KR
South Korea
Prior art keywords
turntable
guide member
rotation shaft
center
rotary shaft
Prior art date
Application number
KR1020080021436A
Other languages
Korean (ko)
Inventor
윤호업
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020080021436A priority Critical patent/KR20090096079A/en
Publication of KR20090096079A publication Critical patent/KR20090096079A/en

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    • 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
    • H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

A spindle motor is provided to prevent movement of a turn-table on a rotary shaft by increasing a coupling dimension between the rotary shaft and the turn-table. A stator is fixed around a rotary shaft(130). A rotor is integrally rotated with the rotary shaft by interaction with the stator. A turn-table(160) has a coupling tube(163). The coupling tube is inserted to an outer circumference of the rotary shaft. The turn-table is integrally rotated with the rotary shaft. A disc is mounted in the turn-table. A center guide member(170) is movably arranged in an outer circumference of the coupling tube. The center guide member matches a center of the disc and a center of the rotary shaft. An elastic member is arranged between the turn-table and the center guide member. The elastic member elastically supports the center guide member into a shaft direction and a radius direction of the rotary shaft.

Description

스핀들 모터 {SPINDLE MOTOR}Spindle Motors {SPINDLE MOTOR}

도 1a는 종래의 스핀들 모터의 단면도.1A is a cross-sectional view of a conventional spindle motor.

도 1b는 도 1a의 "A"부 확대도.1B is an enlarged view of a portion “A” of FIG. 1A.

도 2는 본 발명의 일 실시예에 따른 스핀들 모터의 단면도.2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention.

도 3은 도 2의 "B"부 확대도.3 is an enlarged view of a portion “B” of FIG. 2;

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

110 : 베이스 120 : 베어링하우징110: base 120: bearing housing

125 : 베어링 130 : 회전축125: bearing 130: rotating shaft

140 : 고정자 150 : 회전자140: stator 150: rotor

160 : 턴테이블 170 : 센터가이드부재160: turntable 170: center guide member

180 : 탄성부재 190 : 볼180: elastic member 190: ball

본 발명은 스핀들 모터에 관한 것이다.The present invention relates to a spindle motor.

일반적인 CD(Compact Disk)는 정보가 기록되는 트랙과 트랙 사이의 간격이 1.7㎛인 반면, BD(Blu-Ray Disk)는 트랙과 트랙 사이의 간격이 0.7㎛이다.A typical CD (Compact Disk) has a space between tracks on which information is recorded and a track is 1.7 mu m, while a BD (Blu-Ray Disk) has a track between tracks and a track distance of 0.7 mu m.

그러므로, 트랙과 트랙 사이의 간격이 고밀도인 BD의 경우에는, CD에 비하여 더욱 견고하고 정밀하게 지지되어 회전되어야 한다. 이를 위하여, BD가 삽입되어 지지되는 센터가이드부재를 황동 가공물로 형성하고, 상기 센터가이드부재를 스프링으로 지지하여, 조심성능을 향상시킨 스핀들 모터가 개발되었는데, 이를 도 1a 및 도 1b를 참조하여 설명한다.Therefore, in the case of a BD with a high gap between the track and the track, it must be supported and rotated more firmly and precisely than the CD. To this end, a spindle motor having a BD guide is inserted into and supported by a brass workpiece, and the center guide member is supported by a spring, thereby improving a careful performance. The spindle motor has been developed with reference to FIGS. 1A and 1B. do.

도 1a는 종래의 스핀들 모터의 단면도이고, 도 1b는 도 1a의 "A"부 확대도이다.1A is a sectional view of a conventional spindle motor, and FIG. 1B is an enlarged view of portion “A” of FIG. 1A.

도시된 바와 같이, 베이스(11)에 베어링하우징(13)이 기립 설치된다. 베어링하우징(13)의 내부에는 베어링(15)이 고정되고, 베어링(15)에는 회전축(17)이 회전가능하게 설치된다.As shown, the bearing housing 13 is standing on the base 11. The bearing 15 is fixed to the inside of the bearing housing 13, and the rotating shaft 17 is rotatably installed on the bearing 15.

베어링하우징(13)에는 코어(21a)와 코일(21b)을 가지는 고정자(21)가 고정되고, 회전축(17)에는 로터요크(23a)와 마그네트(23b)를 가지는 회전자(23)가 고정된다. 그리하여, 코일(21b)에 전류가 공급되면, 코일(21b)과 마그네트(23b)의 작용에 의하여 회전자(23)가 회전하면서 회전축(17)을 회전시킨다.A stator 21 having a core 21a and a coil 21b is fixed to the bearing housing 13, and a rotor 23 having a rotor yoke 23a and a magnet 23b is fixed to the rotation shaft 17. . Thus, when a current is supplied to the coil 21b, the rotor 23 rotates while the rotor 23 rotates by the action of the coil 21b and the magnet 23b.

로터요크(23a) 상측의 회전축(17)의 외주면에는 디스크(50)가 탑재되는 합성수지제의 턴테이블(25)이 결합되고, 턴테이블(25) 상측의 회전축(17)의 외주면에는 황동 가공물인 센터가이드부재(31)가 승강가능하게 결합된다.On the outer circumferential surface of the rotary shaft 17 on the upper side of the rotor yoke 23a, a turntable 25 made of synthetic resin on which the disk 50 is mounted is coupled, and a center guide, which is a brass workpiece, is attached to the outer circumferential surface of the rotary shaft 17 on the upper side of the turntable 25. The member 31 is coupled to be liftable.

턴테이블(25)과 센터가이드부재(31) 사이에는 스프링(35)이 마련되는데, 스프링(35)은 센터가이드부재(31)를 회전축(17)의 축방향 및 반경방향으로 지지하여, 턴테이블(25)에 탑재된 디스크(50)의 중심이 회전축(17)의 중심과 일치하도록 탄성 지지한다.A spring 35 is provided between the turntable 25 and the center guide member 31. The spring 35 supports the center guide member 31 in the axial direction and the radial direction of the rotation shaft 17, thereby turning the turntable 25. Is elastically supported so that the center of the disk 50 mounted in the center) coincides with the center of the rotation shaft 17.

상기와 같은 종래의 스핀들 모터는 합성수지제의 턴테이블(25)과 회전축(17) 사이의 결합면적이 작아 결합력이 약하다. 이로인해, 턴테이블(25)이 유동하게 되어 큰 진동이 발생하는 단점이 있다.The conventional spindle motor as described above has a small coupling area between the turntable 25 and the rotary shaft 17 made of synthetic resin, so that the coupling force is weak. As a result, the turntable 25 is flowed, which causes a large vibration.

또한, 최악의 경우에는, 턴테이블(25)이 회전축(17)에서 빠지므로, 제품의 신뢰성이 저하되는 단점이 있다.Further, in the worst case, since the turntable 25 is pulled out of the rotary shaft 17, there is a disadvantage that the reliability of the product is lowered.

도 1a의 미설명 부호 33은 센터가이드부재(31)가 회전축(17)의 상측으로 이탈되는 것을 방지하는 부시이다.Reference numeral 33 in FIG. 1A denotes a bush that prevents the center guide member 31 from being separated from the upper side of the rotation shaft 17.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 목적은 결합력을 향상시켜 진동을 저감할 수 있는 스핀들 모터를 제공함에 있다.The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to provide a spindle motor that can reduce the vibration by improving the coupling force.

상기 목적을 달성하기 위한 본 발명에 따른 스핀들 모터는, 회전가능하게 설치된 회전축; 상기 회전축의 주위에 고정된 고정자; 상기 회전축에 결합되며 상기 고정자와 작용하여 상기 회전축과 일체로 회전하는 회전자; 상기 회전축의 외주면에 삽입 결합되는 결합관을 가지고, 상기 회전축과 일체로 회전하며, 디스크가 탑재되는 턴테이블; 상기 결합관의 외주면에 승강가능하게 설치되어 상기 디스크의 중심이 상기 회전축의 중심과 일치하도록 지지하는 센터가이드부재; 상기 턴테이블과 상기 센터가이드부재 사이에 마련되어 상기 센터가이드부재를 상기 회전축의 축 방향 및 반경방향으로 탄성지지하는 탄성부재를 포함한다.Spindle motor according to the present invention for achieving the above object, the rotating shaft rotatably installed; A stator fixed around the rotating shaft; A rotor that is coupled to the rotation shaft and rotates integrally with the rotation shaft by working with the stator; A turntable having a coupling tube inserted into and coupled to an outer circumferential surface of the rotation shaft, the turntable being integrally rotated with the rotation shaft and mounted on a disk; A center guide member installed on an outer circumferential surface of the coupling pipe to support the center of the disk to coincide with the center of the rotation shaft; And an elastic member provided between the turntable and the center guide member to elastically support the center guide member in the axial direction and the radial direction of the rotation shaft.

이하, 첨부된 도면을 참조하여 본 발명의 일 실시예에 따른 스핀들 모터를 상세히 설명한다.Hereinafter, a spindle motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일 실시예에 따른 스핀들 모터의 단면도이고, 도 3은 도 2의 "B"부 확대도이다.2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention, Figure 3 is an enlarged view "B" portion of FIG.

도시된 바와 같이, 본 실시예에 따른 스핀들 모터는 베이스(110), 베이스(110)에 수직으로 기립 설치된 베어링하우징(120)을 가진다.As shown, the spindle motor according to the present embodiment has a base 110, a bearing housing 120 standing perpendicular to the base (110).

이하, 구성요소들의 면 및 방향을 지칭함에 있어서, 베이스(110)의 수직방향 상측을 향하는 면 및 방향을 "상면 및 상측", 하측을 향하는 면 및 방향을 "하면 및 하측"이라 한다.Hereinafter, in referring to the plane and the direction of the components, the plane and the direction facing upward in the vertical direction of the base 110 is referred to as "upper and upper side", the plane and the direction facing downward is referred to as "lower and lower side".

베어링하우징(120)은 상면이 개방되고, 하면측 외주면이 베이스(110)에 결합된다.The bearing housing 120 has an upper surface open, and a lower outer peripheral surface thereof is coupled to the base 110.

베어링하우징(120)의 내부에는 베어링(125)이 고정되고, 베어링(125)에는 회전축(130)의 하부측이 지지되어 회전가능하게 설치된다. 베어링하우징(120)에는 고정자(140)가 고정되고, 회전축(130)에는 고정자(140)와 작용하여 회전하는 회전자(150)가 고정된다.The bearing 125 is fixed to the inside of the bearing housing 120, and a lower side of the rotating shaft 130 is supported on the bearing 125 to be rotatably installed. The stator 140 is fixed to the bearing housing 120, and the rotor 150 that rotates by acting with the stator 140 is fixed to the rotation shaft 130.

고정자(140)는 베어링하우징(120)의 외주면에 고정된 코어(141)와 코어(141)에 권선된 코일(145)을 가지고, 회전자(150)는 베어링하우징(120)의 상측으로 노출된 회전축(130)의 외주면에 고정된 로터요크(151)와 로터요크(151)의 내주면에 고정되어 고정자(140)와 대향하는 마그네트(155)를 가진다. 그리하여, 코일(145)에 전류가 공급되면, 코일(145)과 마그네트(155) 사이에 형성되는 전자기력에 의하여 회전자(150)가 회전하면서 회전축(130)을 일체로 회전시킨다.The stator 140 has a core 141 fixed to the outer circumferential surface of the bearing housing 120 and a coil 145 wound on the core 141, and the rotor 150 is exposed to the upper side of the bearing housing 120. The rotor yoke 151 fixed to the outer circumferential surface of the rotation shaft 130 and the magnet 155 fixed to the inner circumferential surface of the rotor yoke 151 to face the stator 140 are provided. Therefore, when a current is supplied to the coil 145, the rotor 150 rotates integrally while the rotor 150 rotates by an electromagnetic force formed between the coil 145 and the magnet 155.

로터요크(151) 상측의 회전축(130) 외주면에는 합성수지제의 턴테이블(160)이 결합된다. 턴테이블(160)은 회전축(130)과 일체로 회전하며 디스크(50)가 탑재되어 지지된다.The turntable 160 made of synthetic resin is coupled to the outer circumferential surface of the rotating shaft 130 above the rotor yoke 151. The turntable 160 rotates integrally with the rotation shaft 130 and is supported by the disk 50 mounted thereon.

턴테이블(160)은 합성수지제이고 회전축(130)은 금속제이므로, 턴테이블(160)과 회전축(130)의 결합면적이 작으면, 턴테이블(160)과 회전축(130)의 결합력이 약하여, 턴테이블(160)이 유동할 수 있다.Since the turntable 160 is made of synthetic resin and the rotating shaft 130 is made of metal, when the coupling area of the turntable 160 and the rotating shaft 130 is small, the coupling force between the turntable 160 and the rotating shaft 130 is weak, so that the turntable 160 is formed. This can flow.

본 실시예에 따른 스핀들 모터는 회전축(130)과 턴테이블(160)의 결합력을 향상시키기 위하여, 턴테이블(160)의 중앙부측에 결합관(163)을 돌출 형성하고, 결합관(163)을 회전축(130)의 외주면에 압입 결합한다. 그러면, 턴테이블(160)과 회전축(130)의 결합면적이 넓으므로, 턴테이블(160)이 회전축(130)에 견고하게 결합되는 것이다.Spindle motor according to the present embodiment, in order to improve the coupling force between the rotary shaft 130 and the turntable 160, protruding the coupling tube 163 on the central side of the turntable 160, the coupling tube 163 to the rotary shaft ( And press-fit to the outer circumferential surface of 130). Then, since the coupling area of the turntable 160 and the rotating shaft 130 is wide, the turntable 160 is firmly coupled to the rotating shaft 130.

결합관(163)의 외주면에는 황동 가공물인 센터가이드부재(170)가 승강가능하게 설치된다. 센터가이드부재(170)는 디스크(50)의 내주면과 접촉하여, 턴테이블(160)에 탑재된 디스크(50)의 중심이 회전축(130)이 중심과 일치하도록 지지한다.On the outer circumferential surface of the coupling pipe 163, the center guide member 170, which is a brass workpiece, is installed to be elevated. The center guide member 170 contacts the inner circumferential surface of the disk 50 to support the center of the disk 50 mounted on the turntable 160 so that the rotation shaft 130 coincides with the center.

그리고, 센터가이드부재(170) 상측의 회전축(130)의 외주면에는 센터가이드부재(170)가 회전축(130)의 상측으로 이탈하는 것을 방지하는 황동가공물인 부시(175)가 결합된다.The bush 175, which is a brass workpiece that prevents the center guide member 170 from escaping to the upper side of the rotation shaft 130, is coupled to the outer circumferential surface of the rotation shaft 130 above the center guide member 170.

턴테이블(160)과 센터가이드부재(170) 사이에는 센터가이드부재(170)의 중심이 회전축(130)의 중심과 일치하도록 센터가이드부재(170)를 회전축(130)의 축방향 및 반경방향으로 탄성 지지하는 탄성부재(180)가 마련된다.Between the turntable 160 and the center guide member 170, the center guide member 170 is elastic in the axial direction and the radial direction of the rotation shaft 130 so that the center of the center guide member 170 coincides with the center of the rotation shaft 130. A supporting elastic member 180 is provided.

도 2의 미설명부호 190은 턴테이블(160)과 디스크(50)의 편심에 의한 진동을 저감하기 위한 볼이다.Reference numeral 190 in FIG. 2 is a ball for reducing vibration caused by the eccentricity of the turntable 160 and the disk 50.

이상에서 설명한 바와 같이, 본 발명에 따른 스핀들 모터는 턴테이블의 중앙부측에 돌출 형성된 결합관이 회전축의 외주면에 삽입 결합된다. 그러면, 턴테이블과 회전축의 결합면적이 넓어, 턴테이블이 회전축에 견고하게 결합된다. 이로인해, 턴테이블이 회전축상에 유동하지 않으므로, 진동이 저감된다.As described above, in the spindle motor according to the present invention, the coupling tube protruding from the central portion of the turntable is inserted and coupled to the outer circumferential surface of the rotation shaft. Then, the coupling area of the turntable and the rotating shaft is wide, and the turntable is firmly coupled to the rotating shaft. As a result, since the turntable does not flow on the rotational axis, vibration is reduced.

이상에서는, 본 발명의 일 실시예에 따라 본 발명을 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 변경 및 변형한 것도 본 발명에 속함은 당연하다.In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (2)

회전가능하게 설치된 회전축;A rotating shaft rotatably installed; 상기 회전축의 주위에 고정된 고정자;A stator fixed around the rotating shaft; 상기 회전축에 결합되며 상기 고정자와 작용하여 상기 회전축과 일체로 회전하는 회전자;A rotor that is coupled to the rotation shaft and rotates integrally with the rotation shaft by working with the stator; 상기 회전축의 외주면에 삽입 결합되는 결합관을 가지고, 상기 회전축과 일체로 회전하며, 디스크가 탑재되는 턴테이블;A turntable having a coupling tube inserted into and coupled to an outer circumferential surface of the rotation shaft, the turntable being integrally rotated with the rotation shaft and mounted on a disk; 상기 결합관의 외주면에 승강가능하게 설치되어 상기 디스크의 중심이 상기 회전축의 중심과 일치하도록 지지하는 센터가이드부재;A center guide member installed on an outer circumferential surface of the coupling pipe to support the center of the disk to coincide with the center of the rotation shaft; 상기 턴테이블과 상기 센터가이드부재 사이에 마련되어 상기 센터가이드부재를 상기 회전축의 축방향 및 반경방향으로 탄성지지하는 탄성부재를 포함하는 스핀들 모터.And a resilient member provided between the turntable and the center guide member to elastically support the center guide member in the axial direction and the radial direction of the rotation shaft. 제 1 항에 있어서,The method of claim 1, 상기 턴테이블은 합성수지제인 스핀들 모터.The turntable is a spindle motor made of synthetic resin.
KR1020080021436A 2008-03-07 2008-03-07 Spindle motor KR20090096079A (en)

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