KR20130066793A - Pin jig for prevention coating inner surface of sleeve hole for motor and method for coating upper surface of sleeve for motor thereby - Google Patents

Pin jig for prevention coating inner surface of sleeve hole for motor and method for coating upper surface of sleeve for motor thereby Download PDF

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Publication number
KR20130066793A
KR20130066793A KR1020110133457A KR20110133457A KR20130066793A KR 20130066793 A KR20130066793 A KR 20130066793A KR 1020110133457 A KR1020110133457 A KR 1020110133457A KR 20110133457 A KR20110133457 A KR 20110133457A KR 20130066793 A KR20130066793 A KR 20130066793A
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KR
South Korea
Prior art keywords
sleeve
motor
coating
insertion hole
shaft insertion
Prior art date
Application number
KR1020110133457A
Other languages
Korean (ko)
Inventor
민창기
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 KR1020110133457A priority Critical patent/KR20130066793A/en
Publication of KR20130066793A publication Critical patent/KR20130066793A/en

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Classifications

    • 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
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The present invention, the body portion formed in a cylindrical shape to be inserted into the sleeve hole for the motor; And a head portion formed to have a larger diameter than the diameter of the body portion at an upper end of the body portion so as to be caught at an upper end of the sleeve sleeve for the motor. It provides an internal coating prevention pin jig of the sleeve hole for the motor comprising a.

Description

Pin Jig for Prevention Coating Inner Surface of Sleeve Hole for Motor and Method for Coating Upper Surface of Sleeve for Motor Thereby}

The present invention relates to a pin jig for preventing internal coating of a sleeve hole for a motor and a top surface coating method for a sleeve for a motor using the same.

A hard disk drive (HDD), which is one of information storage devices of a computer, is a device that reproduces data stored on a disk using a magnetic head or records data on a disk.

Such a hard disk drive needs a disk drive capable of driving a disk.

A compact spindle motor may be used for such a disk drive, and the compact spindle motor may include a fixed member and a rotating member rotating about the fixed member.

The fixing member may include a base and a sleeve provided on the base to support the shaft so as to rotatably support the shaft.

Such a sleeve may be rubbed with other components by vibration, etc. when the shaft rotates, and thus the top surface may be worn. Conventionally, the top surface of the sleeve is directly coated using DLC (Diamond-Like Carbon) coating to reduce the wear phenomenon. Is adopted.

However, when the sleeve is directly coated, plasma is also generated on the inner circumferential surface of the shaft insertion hole of the sleeve for installing the shaft, thereby causing a problem that a coating film may be unexpectedly formed.

Therefore, when the coating is made on the inner circumferential surface of the shaft insertion hole when the top surface of the sleeve is coated, the diameter of the shaft insertion hole is deformed by the thickness of the coating film, and even if the shaft is not fitted or the shaft is not easy to rotate, the motor is defective. There was a problem that could occur.

There is a need in the art for a new method for preventing the inner circumferential surface of the shaft insertion hole from being coated together when coating the top of the sleeve.

One aspect of the present invention, the body portion is formed in a cylindrical shape to be inserted into the sleeve hole for the motor; And a head portion formed to have a larger diameter than the diameter of the body portion at an upper end of the body portion so as to be caught at an upper end of the sleeve sleeve for the motor. It provides an internal coating prevention pin jig of the sleeve hole for the motor comprising a.

In one embodiment of the present invention, the head portion may be in the shape of a flange.

In one embodiment of the present invention, the connecting portion of the body portion and the head portion may have an inclined surface.

In one embodiment of the present invention, the body portion may be a coating film formed on the surface.

In one embodiment of the present invention, the lower edge portion of the body portion may have a curved surface or an inclined surface.

In another aspect of the present invention, the sleeve is fixed to the hollow portion of the base, the pin jig is inserted in close contact with the shaft insertion hole of the sleeve, the DLC (Diamond-Like Carbon) coating on the upper surface of the coating film Forming, but after the DLC coating to remove the pin jig from the shaft insertion hole provides an upper surface coating method of the sleeve for the motor to prevent the coating on the inner peripheral surface of the shaft insertion hole.

In one embodiment of the present invention, the pin jig includes a cylindrical body portion and a head portion having a larger diameter than the body portion at the upper end of the body portion, wherein the head portion is inserted into the body portion into the shaft insertion hole or Can serve as a handle for insertion and removal.

In one embodiment of the present invention, the upper end of the shaft insertion hole and the connecting portion of the body and the head of the pin jig is formed to have an inclined surface, respectively, the inclination of the inclined surface of the shaft insertion hole than the inclination of the inclined surface of the pin jig When the pin jig is inserted, the inclined surface of the pin jig may be spaced apart from the inclined surface of the shaft insertion hole and the top surface of the sleeve.

According to an embodiment of the present invention, by inserting a pin jig into the shaft insertion hole when coating the upper surface of the sleeve, and removing the pin jig from the shaft insertion hole after the coating is completed, the shaft insertion hole with a simple structure By preventing the inner circumferential surface is coated, there is an effect that can improve the workability for the upper surface coating of the sleeve.

In addition, the coating film formed on the upper surface of the sleeve can reduce the wear phenomenon of the sleeve due to the friction of the parts when the shaft rotates to facilitate the rotation of the motor more smoothly, and also prevent the generation of particles due to wear, thereby preventing the inside of the motor. By reducing the accumulation of foreign substances, it is possible to improve the life of the product.

1 is a cross-sectional view showing a motor applied to the present invention.
FIG. 2 is a cross-sectional view of the base and the sleeve separately shown in FIG. 1.
3 is a cross-sectional view showing a structure in which the pin jig according to one embodiment of the present invention is inserted or removed into the shaft insertion hole of the sleeve in FIG.
4a to 4c are coated with the upper surface of the sleeve for the motor using a pin jig according to an embodiment of the present invention, and then enlarged the shape of the upper surface of the sleeve, the upper end of the shaft insertion hole and the inner peripheral surface of the shaft insertion hole, respectively It is an electron microscope photograph shown.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

In the drawings, like reference numerals are used throughout the drawings.

In addition, to include an element throughout the specification does not exclude other elements unless specifically stated otherwise, but may include other elements.

Referring to FIGS. 1 and 2, the motor 100 to which the pin jig of the present embodiment to be described below is applied provides a space in which a configuration constituting the motor 100 having a hollow portion can be accommodated therein and the configurations It includes a base 110 for supporting, and a sleeve 150 fixed to the hollow portion of the base 110 by an adhesive or the like.

In addition, the motor 100 is rotatably supported by a rotor 130 having a cylindrical shape having an open lower side and covering the stator 140 and one end of the shaft insertion hole 180 formed at the center of the sleeve 150. And the other end of the shaft 120 coupled to the center of the rotor 130, the flange portion 122 formed on the outer circumferential surface of the upper side of the shaft 120 to cover the upper side of the sleeve 150, and the flange portion 122. Cap 152 to cover the edge of the, and may further include a magnet 132 coupled to the inner peripheral surface of the rotor (130).

The stator 140 may include an annular core and coils 142 wound around teeth and teeth extending at regular intervals to the outside of the core, and the core may include a support 160 formed at the center of the base 110. It may be inserted into and supported by the base 110.

The sleeve 150 has a generally cylindrical shape, and may accommodate the shaft 120 therein, and may be configured, for example, with a hydrodynamic bearing, and the shaft 120, the sleeve 150, and the flange portion. Lubricant may be interposed between the 122 and the cap 152 to facilitate the rotation of the shaft 120.

An upper surface of the sleeve 150 may be formed with a coating film 190 to prevent the upper surface from being damaged by friction with the flange 122 and the cap 152 when the shaft 120 rotates. The coating film 190 may be formed through CVD coating or the like, but the present invention is not limited thereto.

In coating the upper surface of the sleeve 150 as described above, the shaft insertion hole 180 is inserted into the shaft insertion hole 180 of the sleeve 150 by inserting the pin jig 170 so as to be in close contact with the inner circumferential surface 182 without any gap. It is to block the penetration of the coating liquid into the interior of 180).

Subsequently, when the coating is completed and the coating film 190 is formed on the upper surface of the sleeve 150, the pin jig 170 is separated from the shaft insertion hole 180, and the shaft 120 is disposed in the shaft insertion hole 180. Combined to manufacture the motor (100).

Therefore, when the pin jig 170 is inserted into the shaft insertion hole 180 of the sleeve 150 and coated, the inner surface 1812 of the shaft insertion hole 180 is not coated, so that the shaft 120 It does not interfere with the coupling or interfere with the rotation of the shaft 120 when the motor 100 is operated.

Hereinafter, the pin jig 170 of the present embodiment will be described in more detail with reference to FIG. 3. The pin jig 170 according to the present embodiment is inserted into the shaft insertion hole 180 of the sleeve 150. Body portion 172 and the head portion 173 formed to have a larger diameter than the diameter of the body portion 172 at the upper end of the body portion 172 is caught in the shaft insertion hole 180 of the sleeve 150 It includes.

The head portion 173 serves as a handle when the body portion 172 is inserted into or removed from the shaft insertion hole 180, and preferably may have a flange shape.

The body portion 172 is configured to be in close contact with the inner circumferential surface of the shaft insertion hole 180, so that the bar friction with the inner circumferential surface of the shaft insertion hole 180 when inserting or removing the shaft insertion hole 180 On the surface of the portion 172, a coating film (not shown) may be formed using a material having excellent friction resistance.

In addition, the lower edge portion 174 of the body portion 172 may be formed as a curved surface or inclined surface to minimize the friction when inserted into the shaft insertion hole 180 to facilitate insertion.

On the other hand, the shaft insertion hole 180 of the sleeve 150 may be formed such that the upper end surface has an inclined surface 181, in this case, the body portion 172 and the head portion 173 of the pin jig 170 The connection part may also be formed as an inclined surface 171 corresponding to the inclined surface 181 of the shaft insertion hole 180.

At this time, the inclination of the inclined surface 181 of the shaft insertion hole 180 is formed at a gentler angle than the inclination of the inclined surface 171 of the pin jig 170 to form the pin jig 170 in the shaft insertion hole 180. When inserted, the inclined surface 181 of the shaft insertion hole 180 and the inclined surface 171 of the pin jig 170 may be spaced apart from each other to form the coating layer 190 to the shortest edge of the upper surface of the sleeve 150. .

4A illustrates that the coating film 190 is formed on the top surface of the sleeve 150 to a thickness of 1.44 μm, and FIG. 4B illustrates the coating film 190 formed on the inclined surface 181 of the shaft insertion hole 180 of the sleeve 150. It can be seen that the thickness is 1.04 ㎛ thinner than that formed on the upper surface of the sleeve 150, but satisfies a certain level, Figure 4c shows the inner surface of the shaft insertion hole 180, the coating film It can be seen that it was not formed at all.

In particular, as shown in FIG. 3, when the upper surface of the sleeve 150 has a stepped or inclined surface, when the body portion 172 of the pin jig 170 is formed in a straight line, the shaft insertion hole (through the stepped or inclined surface ( Some of the coating liquid may penetrate into the inside of the 180, but this problem can be solved by making the outer circumferential surface of the pin jig 170 corresponding to the inclined surface 181 of the shaft insertion hole 180 as the inclined surface 171. .

On the other hand, the shaft 120 is not in contact with the inclined surface 181 of the shaft insertion hole 180, this action is to insert the shaft 120 into the shaft insertion hole 180 or when operating the motor 100 It does not affect the rotation of the shaft 120.

The present invention is not limited to the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims.

It will be apparent to 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. something to do.

100; Motor 110; Base
120; Shaft 130; Rotor
140; Stator 150; sleeve
160; Support 170; Pin jig
171; Slope 172; Body portion
173; Head portion 174; Bottom edge
180; Shaft insertion holes 181; incline
182; Inner circumferential surface

Claims (8)

A body portion formed in a cylindrical shape to be inserted into the sleeve hole for the motor; And
A head portion formed to have a larger diameter than the diameter of the body portion at an upper end of the body portion so as to be caught at an upper end of the sleeve hole for the motor; Inner coating prevention pin jig of the sleeve hole for the motor comprising a.
The method of claim 1,
Pin jig for preventing internal coating of the sleeve hole for the motor, characterized in that the head portion has a flange shape.
The method of claim 1,
Inner coating preventing pin jig of the sleeve for the motor, characterized in that the connecting portion of the body portion and the head portion has an inclined surface.
The method of claim 1,
The body jig pin preventing the inner surface of the sleeve for the motor, characterized in that the coating film is formed on the surface.
The method of claim 1,
An inner coating preventing pin jig of the sleeve for the motor, characterized in that the lower edge portion of the body portion has a curved surface or inclined surface.
The sleeve is fixed to the hollow portion of the base, the pin jig is inserted in close contact with the shaft insertion hole of the sleeve, and a coating film is formed by coating DLC (Diamond-Like Carbon) on the upper surface of the sleeve, wherein the DLC coating And then removing the pin jig from the shaft insertion hole to prevent coating on the inner circumferential surface of the shaft insertion hole.
The method according to claim 6,
The pin jig includes a cylindrical body portion and a head portion having a larger diameter than the body portion at the top of the body portion, wherein the head portion serves as a handle for inserting or inserting the body portion into the shaft insertion hole. Top coating method of a sleeve for a motor characterized in that.
The method of claim 7, wherein
The upper end of the shaft insertion hole and the connecting portion of the body and the head of the pin jig are formed to have an inclined surface, respectively, wherein the inclination of the inclined surface of the shaft insertion hole is formed at a gentler angle than that of the inclined surface of the pin jig. When the jig is inserted, the inclined surface of the pin jig is spaced apart from the inclined surface of the shaft insertion hole and the upper surface of the sleeve, the upper surface coating method of the motor sleeve.
KR1020110133457A 2011-12-13 2011-12-13 Pin jig for prevention coating inner surface of sleeve hole for motor and method for coating upper surface of sleeve for motor thereby KR20130066793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110133457A KR20130066793A (en) 2011-12-13 2011-12-13 Pin jig for prevention coating inner surface of sleeve hole for motor and method for coating upper surface of sleeve for motor thereby

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110133457A KR20130066793A (en) 2011-12-13 2011-12-13 Pin jig for prevention coating inner surface of sleeve hole for motor and method for coating upper surface of sleeve for motor thereby

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KR20130066793A true KR20130066793A (en) 2013-06-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102004158B1 (en) * 2018-03-29 2019-07-26 효성전기주식회사 Shaft and core structure for brushless motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102004158B1 (en) * 2018-03-29 2019-07-26 효성전기주식회사 Shaft and core structure for brushless motor

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