KR200450524Y1 - Spindle motor - Google Patents

Spindle motor Download PDF

Info

Publication number
KR200450524Y1
KR200450524Y1 KR2020080013382U KR20080013382U KR200450524Y1 KR 200450524 Y1 KR200450524 Y1 KR 200450524Y1 KR 2020080013382 U KR2020080013382 U KR 2020080013382U KR 20080013382 U KR20080013382 U KR 20080013382U KR 200450524 Y1 KR200450524 Y1 KR 200450524Y1
Authority
KR
South Korea
Prior art keywords
bearing housing
thrust
thrust plate
formed
rotating shaft
Prior art date
Application number
KR2020080013382U
Other languages
Korean (ko)
Other versions
KR20100003967U (en
Inventor
임성모
Original Assignee
엘지이노텍 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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR2020080013382U priority Critical patent/KR200450524Y1/en
Publication of KR20100003967U publication Critical patent/KR20100003967U/en
Application granted granted Critical
Publication of KR200450524Y1 publication Critical patent/KR200450524Y1/en

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, 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
    • G11B19/20Driving; Starting; Stopping; Control thereof
    • G11B19/2009Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2786Outer rotor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2205/00Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03Machines characterised by thrust bearings

Abstract

Spindle motor is disclosed. The spindle motor has a thrust stopper coupled to one side of a bearing housing having both sides open or an oval or polygonal settle groove formed on the closed other surface of the bearing housing having one side opened, and a thrust plate is formed to correspond to the settle groove. Insert the plate into the settling groove. Then, even when the rotating shaft rotates, the thrust plate in contact with the rotating shaft does not rotate, and there is no abrasion due to friction between the thrust plate and the thrust stopper. Therefore, no sludge which affects the life of the motor is generated, so the life of the motor is extended.

Description

Spindle Motors {SPINDLE MOTOR}

1 is a perspective view of main parts of a conventional spindle motor.

2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention.

3 is a perspective view of main parts of FIG. 2;

Figure 4 is a perspective view of the main portion of the spindle motor according to another embodiment of the present invention.

5A and 5B are perspective views of some cutaway parts of a spindle motor according to still other embodiments of the present invention.

Explanation of symbols on the main parts of the drawings

110: base 120: bearing housing

121: body 125: thrust stopper

130: bearing 140: rotating shaft

150: stator 170: rotor

180: thrust plate

The present invention relates to a spindle motor.

The spindle motor is installed in the ODD (Opticla Disk Drive) to rotate the disk so that the linear pickup can read the data recorded on the disk.

1 is a perspective view illustrating main parts of a conventional spindle motor.

As shown, the bearing 21 is fixed to the inside of the bearing housing 13 standing up on the base 11, the rotating shaft 25 is supported on the bearing 21 is rotatably installed.

A thrust stopper 15 is coupled to an open surface of the bearing housing 13 coupled to the base 11 to prevent separation of the rotation shaft 25. The thrust stopper 15 prevents the thrust stopper 15 and the rotary shaft 25 from directly contacting the thrust stopper 15 and the rotary shaft 25, thereby preventing the thrust stopper 15 and the rotary shaft 25 from being worn. 17 is installed.

At this time, the thrust plate 17 is formed in a circular shape, is inserted into the circular settle groove 15a formed in the thrust stopper 15.

In the conventional spindle motor as described above, since the circular thrust plate 17 is inserted into the circular settling groove 15a, the thrust plate 17 also rotates by the rotation of the rotation shaft 25. Then, the thrust plate 17 and the thrust stopper 15 are rubbed, sludge is generated, and the sludge has a disadvantage in that the life of the motor is shortened.

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 extend the life.

Spindle motor according to the present invention for achieving the above object, the base; A bearing housing formed on both sides of an open cylindrical shape and having one side coupled to the base and standing up; A bearing fixed to the inside of the bearing housing; A thrust stopper for sealing one surface of the bearing housing; A thrust plate inserted into the bearing housing and supported by the thrust stopper; A rotating shaft rotatably supported by the bearing; A stator disposed outside the bearing housing; And a rotor coupled to the rotating shaft and rotating the rotating shaft while acting with the stator to rotate.

The thrust stopper is formed with an elliptical or polygonal settling groove, and the thrust plate is formed in a shape corresponding to the settling groove and accommodated in the settling groove.

In addition, the spindle motor according to the present invention for achieving the above object, the base; A bearing housing having one surface formed in an open cylindrical shape, the other surface side of which is coupled to the base and installed upright; A bearing fixed to the inside of the bearing housing; A rotating shaft rotatably supported by the bearing; A thrust plate installed at the other inner surface of the bearing housing and having one end of the rotating shaft contacted and supported; A stator disposed outside the bearing housing; And a rotor coupled to the rotating shaft and rotating the rotating shaft while acting with the stator to rotate.

An oval or polygonal settling groove is formed on the other surface of the bearing housing, and the thrust plate is formed in a shape corresponding to the settling groove and accommodated in the settling groove.

Hereinafter, a spindle motor according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the spindle motor according to an embodiment of the present invention, Figure 3 is a perspective view of the main part of FIG.

As shown, the bearing housing 120 is vertically installed on the base 110.

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".

The bearing housing 120 is formed in a cylindrical shape with both sides open, and the thrust stopper 125 is coupled to the opened lower surface. The thrust stopper 125 is hermetically coupled to the lower surface of the bearing housing 120 by caulking.

The bearing 130 is press-fitted and fixed inside the bearing housing 120, and the bearing 130 is rotatably installed by supporting the outer peripheral surface of the lower side of the rotating shaft 140. The thrust stopper 125 does not allow the rotating shaft 140 to be separated from the lower side of the bearing housing 120.

A stator 150 having a core 151 and a coil 155 wound around the core 151 is fixed to an outer side, that is, an outer circumferential surface of the bearing housing 120, and a rotating shaft 140 exposed to an upper side of the bearing housing 120. Rotor 160 having a rotor yoke 161 and a magnet 165 is coupled to the outer peripheral surface of the upper side.

Thus, when a current is applied to the coil 155, the rotor 160 is rotated by the electromagnetic force generated between the coil 155 and the magnet 165, thereby rotating the rotating shaft 140.

The rotor yoke 161 also functions as a turntable on which the disk 50 is mounted. A felt 163 is provided on the upper edge portion of the rotor yoke 161 to prevent the mounted disk 50 from slipping.

In the portion of the rotor yoke 161 coupled to the rotating shaft 140, the disk 50 is elastically supported while the center of the disk 50 mounted on the rotor yoke 161 coincides with the center of the rotating shaft 140. The clamp device 170 which prevents 50 from escaping to the upper side of the rotor yoke 161 is provided.

An upper surface of the thrust stopper 125 is formed with a recessed groove 125a formed to be recessed downward, and the thrust plate 180 is inserted into and accommodated in the lower groove of the rotary shaft 140. The thrust plate 180 prevents the rotation shaft 140 and the thrust stopper 125 from directly contacting each other, thereby preventing the rotation shaft 140 and the thrust stopper 125 from being worn.

When the rotating shaft 140 rotates, the thrust plate 180 in contact with the rotating shaft 140 may rotate. Since the thrust plate 180 and the thrust stopper 125 are in contact with each other, oil cannot be injected between the thrust plate 180 and the thrust stopper 125. Therefore, when the thrust plate 180 is rotated, the thrust plate 180 and the thrust stopper 125 are worn by friction, and sludge is generated.

The spindle motor according to the present embodiment is provided with means for preventing the thrust plate 180 from rotating.

The means, the thrust plate 180 is formed in an oval shape, and the settling groove 125a is formed in an oval shape corresponding to the thrust plate 180. Then, since the thrust plate 180 is not rotated, there is no wear caused by friction between the thrust plate 180 and the thrust stopper 125.

Since oil can be injected between the end side of the rotary shaft 140 and the thrust plate 180, there is almost no wear due to friction between the rotary shaft 140 and the thrust plate 180.

Reference numeral 191 of FIG. 2 denotes a stopper that prevents the rotor 160 from escaping to the upper side of the bearing housing 120, and 195 indicates that the rotating shaft 140 and the rotor 160 float upwards. It is a suction magnet to prevent things.

4 is a perspective view illustrating main parts of a spindle motor according to another exemplary embodiment of the present invention, and describes only differences from FIG. 3.

As shown, the means forms the thrust plate 280 into a polygon, such as a square, and the settling groove 225a to form a polygon corresponding to the thrust plate 280. In addition, since the thrust plate 280 does not rotate, there is no wear caused by friction between the thrust plate 280 and the thrust stopper 225.

5A and 5B are perspective views illustrating some cutaways of a spindle motor according to still other embodiments of the present invention.

As shown, the bearing housings 320 and 420 are formed in a cylindrical shape with an upper surface open, and elliptical or polygonal settled grooves 320a and 420a are formed in a sealed lower surface. The thrust plates 380 and 480 are inserted into the settled grooves 320a and 420a.

As described above, the spindle motor according to the present invention forms an oval or polygonal settling groove on the other side of the thrust stopper coupled to one surface of the bearing housing with both sides open or the bearing housing with one side opened, and the settling groove. The thrust plate is inserted into the settling groove by forming a thrust plate corresponding to the. Then, even when the rotating shaft rotates, the thrust plate in contact with the rotating shaft does not rotate, and there is no abrasion due to friction between the thrust plate and the thrust stopper. Therefore, no sludge which affects the life of the motor is generated, so the life of the motor is extended.

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 belongs without modification and modification within the scope without departing from the technical spirit of the present invention. Of course.

Claims (2)

  1. Base;
    A bearing housing formed on both sides of an open cylindrical shape and having one side coupled to the base and standing up;
    A bearing fixed to the inside of the bearing housing;
    A thrust stopper for sealing one surface of the bearing housing;
    A thrust plate inserted into the bearing housing and supported by the thrust stopper;
    A rotating shaft rotatably supported by the bearing;
    A stator disposed outside the bearing housing; And
    A rotor coupled to the rotation shaft and rotating in rotation with the stator to rotate,
    The thrust stopper has an elliptical or polygonal settle groove is formed, the thrust plate is formed in a shape corresponding to the settle groove is accommodated in the settle groove.
  2. Base;
    A bearing housing having one surface formed in an open cylindrical shape, the other surface side of which is coupled to the base and installed upright;
    A bearing fixed to the inside of the bearing housing;
    A rotating shaft rotatably supported by the bearing;
    A thrust plate installed at the other inner surface of the bearing housing and having one end of the rotating shaft contacted and supported;
    A stator disposed outside the bearing housing; And
    A rotor coupled to the rotation shaft and rotating in rotation with the stator to rotate,
    An elliptical or polygonal settle groove is formed on the other surface of the bearing housing, and the thrust plate is formed in a shape corresponding to the settle groove and accommodated in the settle groove.
KR2020080013382U 2008-10-07 2008-10-07 Spindle motor KR200450524Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020080013382U KR200450524Y1 (en) 2008-10-07 2008-10-07 Spindle motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020080013382U KR200450524Y1 (en) 2008-10-07 2008-10-07 Spindle motor

Publications (2)

Publication Number Publication Date
KR20100003967U KR20100003967U (en) 2010-04-15
KR200450524Y1 true KR200450524Y1 (en) 2010-10-08

Family

ID=44450046

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2020080013382U KR200450524Y1 (en) 2008-10-07 2008-10-07 Spindle motor

Country Status (1)

Country Link
KR (1) KR200450524Y1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040072578A (en) * 2004-07-29 2004-08-18 (주)지엔더블유테크놀러지 A fluid dynamic bearing motor
KR20040072576A (en) * 2004-07-29 2004-08-18 (주)지엔더블유테크놀러지 A fluid dynamic bearing motor having a cone bearing
JP2004316924A (en) 2004-07-27 2004-11-11 Ntn Corp Dynamic pressure-type oil-impregnated sintered bearing unit
JP2007327523A (en) 2006-06-06 2007-12-20 Sony Corp Bearing unit and driving motor using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004316924A (en) 2004-07-27 2004-11-11 Ntn Corp Dynamic pressure-type oil-impregnated sintered bearing unit
KR20040072578A (en) * 2004-07-29 2004-08-18 (주)지엔더블유테크놀러지 A fluid dynamic bearing motor
KR20040072576A (en) * 2004-07-29 2004-08-18 (주)지엔더블유테크놀러지 A fluid dynamic bearing motor having a cone bearing
JP2007327523A (en) 2006-06-06 2007-12-20 Sony Corp Bearing unit and driving motor using the same

Also Published As

Publication number Publication date
KR20100003967U (en) 2010-04-15

Similar Documents

Publication Publication Date Title
US8446059B2 (en) Spindle motor and storage disk drive apparatus
US8363352B2 (en) Motor and recording disc drive apparatus
KR101063340B1 (en) Motor
US7521831B2 (en) Ultra-slim spindle motor
US8166496B2 (en) Automatic balancing spindle motor
KR100679581B1 (en) Spindle motor
KR100888241B1 (en) Spindle motor
KR20120021143A (en) Spindle motor for storage disk drive, and storage disk drive furnished with the spindle motor
CN100380784C (en) Electric motor
JP4843806B2 (en) Spindle motor
JP5343543B2 (en) Spindle motor and disk drive using the same
KR101213542B1 (en) Motor assembly with multifunctional components
US7880353B2 (en) Spindle motor having holding magnet preventing oil discharge
JP2007298174A (en) Spindle motor
JP2008182830A (en) Brushless motor, disk driver
US20150188383A1 (en) Motor
JP2005354757A (en) Motor
US20110156541A1 (en) Spindle motor
US8330310B2 (en) Spindle motor with bearing housing and base plate having reverse burring part
US7687946B2 (en) Spindle motor
US7750520B2 (en) Motor
KR100974520B1 (en) Spindle motor
US8615775B2 (en) Motor and disk driving device equipped with motor
US8084907B2 (en) Spindle motor having holding magnet preventing oil discharge
JP2013155868A (en) Spindle motor

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20130910

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20140905

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20161004

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20171011

Year of fee payment: 8

LAPS Lapse due to unpaid annual fee