KR20130057746A - Spindle motor and manufacturing method of the same - Google Patents

Spindle motor and manufacturing method of the same Download PDF

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Publication number
KR20130057746A
KR20130057746A KR1020110123644A KR20110123644A KR20130057746A KR 20130057746 A KR20130057746 A KR 20130057746A KR 1020110123644 A KR1020110123644 A KR 1020110123644A KR 20110123644 A KR20110123644 A KR 20110123644A KR 20130057746 A KR20130057746 A KR 20130057746A
Authority
KR
South Korea
Prior art keywords
protrusion
spindle motor
core
fixing
coil
Prior art date
Application number
KR1020110123644A
Other languages
Korean (ko)
Inventor
이금경
김상원
박상진
Original Assignee
삼성전기주식회사
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 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020110123644A priority Critical patent/KR20130057746A/en
Publication of KR20130057746A publication Critical patent/KR20130057746A/en

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    • 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
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

PURPOSE: A spindle motor, and a manufacturing method thereof are provided to minimize the gap between adjacent combining parts by coiling a protrusion part and fixing·combining a combining part to the protrusion part, thereby improving the motor performance and reducing a coking torque. CONSTITUTION: A spindle motor comprises an armature. The armature comprises a core and a coil which is coiled on the core. The core (110) comprises a protrusion part (112) on which the coil is coiled, and a fixing part (113) which is fixed·combined to the end part of the protrusion part.

Description

Spindle motor and its manufacturing method {Spindle Motor and Manufacturing Method of the same}

The present invention relates to a spindle motor and a method of manufacturing the same.

In general, a spindle motor used as a driving device for a recording disk such as a hard disk has a lubricating fluid such as oil stored between a rotating part and a fixed part at the time of rotation of the motor. It is used in various ways.

More specifically, a spindle motor equipped with a fluid dynamic pressure bearing that maintains axial rigidity of the shaft only by the moving pressure of the lubricating oil by centrifugal force is based on the thrust force. Therefore, there is no metal friction, And it is mainly applied to high-end optical disc apparatuses and magnetic disc apparatuses, since the high-speed rotation of the rotating object is smoother than the motor having the ball bearing.

And the spindle motor having a hydrodynamic bearing according to the prior art, as the coil must be wound, a gap of more than a predetermined interval must be secured in the gap design between the slots of the core. In addition, the larger the gap, the greater the cogging torque, which is a trigger for noise.

The present invention has been made in order to solve the above problems, and includes a core and a coupling portion and the coupling portion, and after winding the coil in the protrusion portion, and fixing and coupling the coupling portion to the protrusion, the gap between adjacent coupling portions It is possible to minimize the cogging torque and to improve the performance of the motor to provide a spindle motor and its manufacturing method.

The present invention comprises a rotating part including a rotating shaft, a hub, and a magnet, and a fixing part including a sleeve for supporting the rotating shaft and an armature opposed to the magnet, and filled with oil to provide fluid dynamic pressure between the rotating part and the fixing part. A spindle motor having a bearing portion, wherein the armature includes a core and a coil wound around the core, and the core includes a protrusion on which the coil is wound and a fixing portion fixed to and coupled to an end of the protrusion.

In addition, the core includes a cylindrical body, a protrusion having a plurality of radially equally spaced portions at an outer circumferential portion of the cylindrical body, and a fixing portion provided with a number corresponding to the protrusion and coupled to the protrusion.

In addition, the fixing portion is formed with an insertion groove corresponding to the end of the protrusion.

Further, the radial gap between adjacent fixing parts is at least two times and four times less than the gap between the fixing part and the magnet.

The present invention is a method for manufacturing a spindle motor, wherein a coil is wound around a protrusion of the core, and a fixing part is fixed to and coupled to an end of the protrusion.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, the core includes a coupling part and a coupling part, and by winding and coupling a coil to the protrusion part, the coupling part is fixed to the protrusion part, thereby minimizing a gap between adjacent coupling parts, thereby reducing cogging torque and reducing the motor. It is possible to obtain a spindle motor which can improve the performance.

1 is a plan view schematically showing a core and a suction magnet of a spindle motor according to the present invention;
FIG. 2 is a schematic configuration diagram of the core shown in FIG. 1. FIG.
Figure 3 is a schematic diagram of a spindle motor according to an embodiment of the present invention.

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. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. It will be further understood that terms such as " first, "" second," " one side, "" other," and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the spindle motor and its manufacturing method according to the present invention.

1 is a plan view schematically showing the core and the suction magnet of the spindle motor according to the present invention, Figure 2 is a schematic configuration diagram of the core shown in FIG. As shown, the core 110 includes a cylindrical body 111, a protrusion 112 and a fixing portion 113.

More specifically, the cylindrical body 111 and the protrusion 112 are integrally formed, and the fixing part 113 is coupled to an end of the protrusion 112. In addition, the protrusion 112 is to wind a coil (not shown), and a plurality of radially equal intervals are formed at an outer circumferential portion of the cylindrical body 111.

In addition, the fixing part 113 is provided with an insertion groove 113a corresponding to the end of the protrusion 112, and provided with a number corresponding to the protrusion 112 and inserting the protrusion 112 into the insertion groove 113a. The fixing part 113 is coupled to the protrusion 112 in a manner that is coupled to the.

In addition, it is preferable that the radial gap b between the adjacent fixing parts 113 is designed to be two or more times four times or less than the gap a between the fixing part 113 and the magnet 120. . And this is considering the optimum design value by improving the motor performance according to the reduction of cogging torque.

In manufacturing the spindle motor according to the present invention, the coil is first wound on the protrusion 112 of the core 110, and the fixing part 113 is fixed to the end of the protrusion 112. As such, the space necessary for winding the coil in the core, that is, the radial gap between the adjacent fixing parts may be minimized, thereby reducing the cogging torque.

3 is a schematic diagram of a spindle motor according to an embodiment of the present invention. As shown in the drawing, the spindle motor 100 includes a rotating part including a rotating shaft 140, a hub 150, and a magnet 120, a sleeve 160, a base 170, a core 110, and a coil 130. The fixing plate including the pulling plate 190 and the cover 180 is filled with oil, which is a working fluid, to form a hydrodynamic bearing unit.

In the rotating unit, the hub 140 is coupled to the upper end of the rotating shaft 140.

In addition, the hub 150 is a cylindrical portion 151 fixed to the upper end of the rotating shaft 140, a disk portion 152 extending radially outward from the cylindrical portion 151, the radius of the disk portion 152 A side wall portion 153 extending downward in the axial direction of the rotation shaft at the outer end in the direction, extending downward from the disc portion 152 in the axial direction of the rotation shaft 140 for oil sealing, and facing the outer circumferential surface of the sleeve; A portion 154 is made.

In addition, the magnet 120 having an annular ring shape is mounted on the inner circumferential surface of the side wall portion 153 so as to face the core 110 and the coil 130.

Next, in the fixing part, the sleeve 160 supports the rotating shaft 140 to be rotatable, and the sleeve 160 is fixed to the base 170.

And the sleeve 160 of the spindle motor 100 according to the present invention is an oil circulation hole (not shown) in the axial direction of the rotating shaft 140 to connect the upper and lower surfaces of the sleeve 160 so that the oil circulates through the rotating shaft system ) May be formed.

The cover 180 is for sealing the oil injected to form the hydrodynamic bearing, and is fixed to the inner circumferential surface of the lower end of the sleeve 160.

A radial hydrodynamic bearing unit, which is a hydrodynamic bearing unit, is formed between the sleeve 160 and the rotation shaft 140. More specifically, the radial dynamic pressure bearing portion (RB) is a minute gap is formed between the rotating shaft 140 and the sleeve 160, the oil is filled in the minute gap is formed a radial dynamic pressure bearing part.

To this end, the radial dynamic pressure bearing portion is formed by selectively forming a dynamic pressure generating groove (not shown) on the inner circumferential surface of the sleeve 160 and the outer circumferential surface of the rotating shaft 140 opposite thereto. In addition, two dynamic pressure generating grooves may be selectively formed at the upper and lower portions of the inner circumferential surface of the sleeve or at the upper and lower portions of the outer circumferential surface of the rotating shaft.

In addition, an armature consisting of the core 110 and the coil 130 is fixed to the outer circumferential portion of the base 170 by indentation or adhesion to face the magnet 120. More specifically, as described above with reference to FIGS. 1 and 2, the core 110 is formed by coupling the fixing part 113 to the cylindrical body 111 and the protrusion 112 which are integrally formed. In the manufacturing method of the spindle motor according to the present invention, the coil 130 is wound around the protrusion 112, and the fixing part 113 is coupled to the end of the protrusion 112. As implemented in this way it is possible to minimize the space between the slots of the core necessary for winding compared to the prior art, thereby reducing the cogging torque can improve the performance of the motor.

In addition, the sleeve 160 is fixed to the inner circumferential portion of the base 170 by press fitting or adhesion.

In addition, the pulling plate 190 is positioned to be axially opposite to the magnet 120 and fixed to the base 170 in order to prevent the floating of the hub 150.

Although the present invention has been described in detail through specific embodiments, this is for describing the present invention in detail, and the spindle motor and its manufacturing method according to the present invention are not limited thereto, and the technical features of the present invention It will be apparent that modifications and improvements are possible by those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: spindle motor 110: core
111: cylindrical body 112: protrusion
113: fixing part 120: magnet
130: coil 140: rotating shaft
150: hub 160: sleeve
170: base 180: cover
190: fling plate

Claims (5)

A rotating part including a rotating shaft, a hub and a magnet, and a fixing part including a sleeve for supporting the rotating shaft and an armature opposed to the magnet, and filled with oil to form a hydrodynamic bearing part between the rotating part and the fixing part. As spindle motor,
The armature includes a core and a coil wound around the core,
And the core includes a protrusion on which a coil is wound and a fixing portion fixed to and coupled to an end of the protrusion.
The method according to claim 1,
The core
Cylindrical body;
A plurality of protrusions formed at equal intervals in the radial direction on the outer circumferential portion of the cylindrical body; And
Spindle motor, characterized in that provided with a number corresponding to the projecting portion includes a fixing portion coupled to the protrusion.
The method according to claim 2,
The fixing motor is a spindle motor, characterized in that the insertion groove corresponding to the end of the protrusion is formed.
The method according to claim 2,
And a radial gap between adjacent fixing parts is at least two times and four times less than the gap between the fixing part and the magnet.
A method of manufacturing the spindle motor of claim 1,
Winding the coil to the protrusion of the core,
A method of manufacturing a spindle motor, characterized in that the fixing part is fixed to the end of the protruding part.
KR1020110123644A 2011-11-24 2011-11-24 Spindle motor and manufacturing method of the same KR20130057746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110123644A KR20130057746A (en) 2011-11-24 2011-11-24 Spindle motor and manufacturing method of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110123644A KR20130057746A (en) 2011-11-24 2011-11-24 Spindle motor and manufacturing method of the same

Publications (1)

Publication Number Publication Date
KR20130057746A true KR20130057746A (en) 2013-06-03

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Family Applications (1)

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KR1020110123644A KR20130057746A (en) 2011-11-24 2011-11-24 Spindle motor and manufacturing method of the same

Country Status (1)

Country Link
KR (1) KR20130057746A (en)

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