KR20120125737A - Base assembly for motor and motor including the same - Google Patents

Base assembly for motor and motor including the same Download PDF

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Publication number
KR20120125737A
KR20120125737A KR1020110043358A KR20110043358A KR20120125737A KR 20120125737 A KR20120125737 A KR 20120125737A KR 1020110043358 A KR1020110043358 A KR 1020110043358A KR 20110043358 A KR20110043358 A KR 20110043358A KR 20120125737 A KR20120125737 A KR 20120125737A
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KR
South Korea
Prior art keywords
motor
pulling plate
fixing part
base assembly
base member
Prior art date
Application number
KR1020110043358A
Other languages
Korean (ko)
Inventor
박재운
Original Assignee
삼성전기주식회사
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Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020110043358A priority Critical patent/KR20120125737A/en
Publication of KR20120125737A publication Critical patent/KR20120125737A/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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • 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)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Motor base assembly according to an embodiment of the present invention includes a base member on which the shaft system of the motor is mounted; A pulling plate coupled to the base member to prevent over-injury of the rotating member of the motor; And a fixing part protruding from the base member to allow the pulling plate to be press-fitted.

Figure P1020110043358

Description

Base assembly for a motor and a motor including the same

The present invention relates to a base assembly for a motor and a motor including the same, and more particularly, to a base assembly for a motor and a motor including the same to improve the performance of the pulling plate to improve performance.

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.

In such a hard disk drive, the base member is provided with a head drive unit, that is, a head stack assembly (HSA), to move the magnetic head on the disc, and the magnetic head rises a predetermined height from the recording surface of the disc by the head drive unit. It performs its function while moving to the desired position.

In addition, a hard disk drive requires a disk drive capable of driving a disk, and a small spindle motor is used for the disk drive.

The compact spindle motor has a rotating member and a fixing member, and the rotating member rotates around the fixing member, and requires a predetermined floating force for the rotation of the rotating member.

However, when a force greater than the flotation force necessary for rotation of the rotating member is generated, that is, an over-injury occurs, the rotating member does not rotate normally or is detached from the fixing member, resulting in a fatal result.

In order to solve this problem, a magnet mounted on the motor and a pulling plate acting on the attraction force are coupled to the base member to prevent over-injury of the rotating member. There was a problem of separation.

Therefore, there is an urgent need for a study of maximizing performance and lifespan by improving the pulling force of a pulling plate that prevents over-injury of a rotating member in a spindle motor.

It is an object of the present invention to provide a base assembly for a motor and a motor including the same to maximize the extraction force of the pulling plate to prevent over-injury of the rotating member to improve performance and life.

Motor base assembly according to an embodiment of the present invention includes a base member on which the shaft system of the motor is mounted; A pulling plate coupled to the base member to prevent over-injury of the rotating member of the motor; And a fixing part protruding from the base member to allow the pulling plate to be press-fitted.

At least one of the fixing part and the pulling plate of the base assembly for a motor according to an embodiment of the present invention may be continuously formed in the circumferential direction so as to correspond to a magnet that generates a rotational driving force of the motor.

The fixing part of the base assembly for a motor according to an embodiment of the present invention may be in contact with the inner surface and the outer surface of the pulling plate.

An inner space of the fixing part of the base assembly for a motor according to an embodiment of the present invention may have a width smaller than the width of the pulling plate so that the pulling plate is press-fitted and fixed.

The fixing part of the base assembly for a motor according to an embodiment of the present invention may be protruded to the upper side of the pulling plate after the pulling plate is fixed by pressing.

The fixing part protruding to the upper side of the pulling plate of the motor base assembly according to an embodiment of the present invention may be bent to the upper surface of the pulling plate to fix the pulling plate to press the upper surface of the pulling plate.

The fixing part protruding upward of the pulling plate of the base assembly for a motor according to an embodiment of the present invention may be caulked to fix the pulling plate.

Motor according to another embodiment of the present invention includes a base assembly for the motor; A core coupled to the base member, the core being wound to generate a rotational driving force; And a hub coupled to the shaft system and having a magnet facing the coil.

According to the motor base assembly and the motor including the same according to the present invention, the pulling force of the pulling plate is improved to prevent over-injury of the rotating member.

In addition, it is possible to improve the performance and life of the motor by improving the defects caused by the bond foreign matter, and to maximize the productivity by simplifying the assembly process of the pulling plate.

1 is a schematic cross-sectional view showing a motor including a base assembly for a motor according to an embodiment of the present invention.
Figure 2 is a schematic perspective view showing a base member provided in the base assembly for a motor according to an embodiment of the present invention.
3 is a schematic perspective view and a schematic cross-sectional view showing a pulling plate provided in the base assembly for a motor according to an embodiment of the present invention.
Figure 4 is a schematic cutaway perspective view showing a coupling process of the base assembly for the motor according to an embodiment of the present invention.
5 is a schematic enlarged cross-sectional view of FIG. 4A showing a caulking process after coupling of a base assembly for a motor according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

1 is a schematic cross-sectional view showing a motor including a base assembly for a motor according to an embodiment of the present invention.

Referring to FIG. 1, a motor 100 including a base assembly 110 for a motor according to an embodiment of the present invention is equipped with a shaft system of a motor 100 and a core 118 on which a coil 116 is wound. It may include a base member 112 to which it is coupled, a hub 130 having a magnet 140 and a pulling plate 114.

First, when defining the term for the direction, the axial direction refers to the up and down direction relative to the shaft 120, as shown in Figure 1, the radially outer and inward direction is the hub 130 relative to the shaft 120 It may mean the center direction of the shaft 120 on the outer end direction of the or based on the outer end of the hub (130).

The shaft system of the motor 100 mounted on the base member 112 may include a shaft 120 and a sleeve 122, and the shaft 120 may be a rotating member that rotates in combination with the hub 130.

Here, the sleeve 122 may support the shaft 120 such that the upper end of the shaft 120 protrudes upward in the axial direction, and forge Cu or Al, or Cu-Fe alloy powder or SUS powder. It can be formed by sintering.

Here, the shaft 120 is inserted to have a micro gap with the shaft hole of the sleeve 122, the micro gap is filled with oil and at least one of the outer diameter of the shaft 120 and the inner diameter of the sleeve 122 Radial dynamic pressure grooves 122a formed in the hub 130 may smoothly support rotation of the hub 130.

The radial dynamic pressure groove 122a may be formed on an inner side surface of the sleeve 122 that is inside the shaft hole of the sleeve 122, and forms a pressure to be deflected to one side when the shaft 120 is rotated. .

However, the radial dynamic pressure groove 122a is not limited to being provided on the inner side of the sleeve 122 as mentioned above, and may be provided on the outer diameter portion of the shaft 120, and the number is limited. Make sure you don't.

Here, the cover plate 124 for receiving oil may be coupled to the sleeve 122 in the axially lower portion of the sleeve 122 while maintaining a gap. The cover plate 124 may serve as a bearing for supporting oil on a lower surface of the shaft 120 by receiving oil in a gap between the sleeves 122.

In addition, the oil is a gap between the shaft 120 and the sleeve 122, a gap between the hub 130 and the sleeve 122 to be described later, the cover plate 124 and the shaft 120 and The gap between the sleeves 122 may be continuously filled to form a full-fill structure as a whole.

The base member 112 may be a fixing member in which an insertion hole is formed such that the sleeve 122 supporting the shaft 120 that is the shaft system of the motor 100 is coupled to the base member 112. The coil 116 generates a predetermined magnitude of electromagnetic force when the power is applied. The core 118 to which is wound may be coupled.

The core 118 is fixedly disposed on an upper portion of the base member 112 having a printed circuit board (not shown) on which a pattern circuit is printed, and an upper surface of the base member 112 corresponding to the coil 116. A plurality of coil holes 115 (see FIG. 2) having a predetermined size may be formed to expose the coil 116 downward.

The coil 116 exposed downward through the coil hole 115 may be electrically connected to the printed circuit board (not shown) to supply external power.

The base member 112 has an outer circumferential surface of the sleeve 122 fixed thereto, and a core 118 to which the coil 116 is wound may be inserted, and an inner surface of the base member 112 or the sleeve 122 may be inserted into the base member 112. It can be assembled by applying an adhesive to the outer surface of the.

Here, the base member 112 may include a fixing part 113 through which the pulling plate 114 is press-fitted, and the detailed description of the fixing part 113 and the base member 112 is shown in FIGS. It will be described later with reference to 5.

The hub 130 is a rotational structure rotatably provided with respect to the fixing member including the base member 112, and the annular magnet 140 corresponding to each other at a predetermined distance from the core 118 on the inner peripheral surface It can be provided.

In addition, the hub 130 is a first cylindrical wall portion 132 to be fixed to the upper end of the shaft 120, a disc portion 134 extending radially outward from the end of the first cylindrical wall portion 132, The second cylindrical wall portion 136 may protrude downward from the radially outer end of the disc portion 134, and the magnet 140 may be coupled to an inner circumferential surface of the second cylindrical wall portion 136.

In addition, the hub 130 may allow the oil to be sealed between the upper outer surface of the sleeve 122, and may have a circumferential wall portion 138 extending downward in the axial direction to seal the oil. .

That is, the circumferential wall portion 138 may protrude from one surface of the hub 130, which is a rotating member, to allow oil to be sealed between the sleeve 122, which is a fixing member, and an upper side of the sleeve 122, which is a fixing member. It may be formed extending along the outer surface of the sleeve 122 as the fixing member so that the interface of the oil is formed between the outer surface.

Pulling plate 114 is a component that the magnet 140 and the attraction force is coupled to the hub 130 to prevent the over-injury of the rotating member including the shaft 120 and the hub 130. .

Shaft 120 and the hub 130, which is a rotating member of the motor 100 according to the present invention should rise to a predetermined height for stable rotation, but may have an adverse effect on performance when over-injury occurs above the designed injury height. .

In this case, the pulling plate 114 may be coupled to the fixing part 113 formed on the base member 112 in order to prevent over-injuries of the shaft 120 and the hub 130, which are rotating members. Overload of the rotating member may be prevented by an attractive force acting between the plate 114 and the magnet 140.

A coupling structure between the pulling plate 114 and the fixing part 113 of the base member 112 will be described later with reference to FIGS. 2 to 5.

2 is a schematic perspective view showing a base member provided in the base assembly for a motor according to an embodiment of the present invention, Figure 3 shows a pulling plate provided in the base assembly for a motor according to an embodiment of the present invention Figure 4 is a schematic perspective view and a schematic cross-sectional view, Figure 4 is a schematic cutaway perspective view showing a coupling process of the base assembly for a motor according to an embodiment of the present invention.

Referring to FIG. 2, the base member 112 provided in the base assembly 110 for a motor according to an embodiment of the present invention may include a disk arrangement portion 112a, a motor seating portion 112b, a fixing portion 113, and the like. Head seating portion 112c may be included.

The disk arranging unit 112a is a portion in which a disk coupled to the motor 100 according to the present invention is disposed. The disk storing unit 112a may store a disk on which data is stored.

A motor seating portion 112b in which the motor 100 is seated may be formed at the center of the disk arrangement 112a, and the motor seating portion 112b may be a coil 116 of the motor 100 according to the present invention. The winding of the core 118 may be provided with a protrusion having a hollow so as to protrude.

At least one coil hole 115 may be formed in the motor seating part 112b to allow the lead line of the coil 116 to pass therethrough, and may be drawn out of the coil 116 drawn out through the coil hole 115. The line may be combined with an external printed circuit board (not shown).

The motor seating part 112b may include a fixing part 113 protruding from one surface corresponding to the magnet 140 coupled to one surface of the hub 130 of the motor 100.

The fixing part 113 may form an inner space for accommodating the pulling plate 114 so that the pulling plate 114 is press-fitted and fixed, and generates a rotational driving force of the motor 100 according to the present invention. It may be continuously formed in the circumferential direction to correspond to the magnet 140.

That is, the fixing part 113 may include an inner fixing portion 113a and an outer fixing portion 113b that respectively contact the inner and outer circumferential surfaces of the pulling plate 114, and the inside of the fixing portion 113. The width of the space, that is, the interval between the inner fixing portion 113a and the outer fixing portion 113b may be smaller than the width of the pulling plate 114.

This may improve the holding force of the pulling plate 114 by increasing the holding force of the pulling plate 114 when the pulling plate 114 is pressed between the inner fixing portion 113a and the outer fixing portion 113b. Will be.

Referring to FIG. 3, the pulling plate 114 provided in the base assembly 110 for a motor according to an embodiment of the present invention may have a ring-shaped shape, and the hub of the motor 100 according to the present invention ( It may be continuously formed in the circumferential direction to correspond to the magnet 140 coupled to 130.

Here, the pulling plate 114 may be made of a ferromagnetic material capable of magnetization by the magnet 140, and the ferromagnetic material may be iron (Fe), nickel (Ni), cobalt (Co), or an alloy thereof. Can be.

Referring to FIG. 4, the annular pulled plate 114 may be press-fitted into a space in the fixing part 113 of the base member 112.

In this case, the pulling plate 114 may be formed to be larger than the width of the inner space of the fixing part 113, and when applied to the fixing part 113 to the internal space of the fixing part 113 by applying an external force. Can be arranged.

When the pulling plate 114 is press-fitted and fixed, an end of the fixing part 113 may protrude upward of the pulling plate 114, and an end of the protruding fixing part 113 may be caulked through the caulking process. Since the upper surface of the pulling plate 114 can be pressed, it is possible to implement more improved holding force.

This will be described later with reference to FIG. 5.

Therefore, when the pulling plate 114 for preventing over-injury of the rotating member of the motor 100 according to the present invention is coupled to the base member 112 by a pressing process, a separate bonding agent is not required for the coupling. Therefore, it is possible to prevent the contamination of the base member 112 due to the foreign matter of the bonding agent.

In addition, since the pulling plate 114 may be coupled to the base member 112 by a simple process of indentation, productivity may be maximized.

FIG. 5 is a schematic enlarged cross-sectional view of A of FIG. 4, illustrating a coking process after coupling of a base assembly for a motor according to an embodiment of the present disclosure.

Referring to FIG. 5, when the pulling plate 114 is press-fitted into the inner space of the fixing part 113, the fixing part 113 may protrude upward from the pulling plate 114.

In this case, the end of the protruding fixing part 113 may be bent to the upper surface of the pulling plate 114 to press the upper surface of the pulling plate 114.

In addition, an end of the protruding fixing part 113 may be caulked to pressurize the upper surface of the pulling plate 114, which deforms the end of the fixing part 113 by using a caulking tablet or the like. Can be implemented.

Therefore, the pulling plate 114 is fixed by the fixing part 113 as well as the inner and outer peripheral surface, as well as the upper surface can further improve the holding force of the pulling plate 114.

Through the above embodiment, the pulling base 114 can be fixed to the base member 112 through a process called indentation to improve the extraction force of the pulling plate 114, so the base assembly 110 for the motor according to the present invention. And it can maximize the performance and life of the motor 100 including the same.

In addition, it is possible to improve the performance and life of the motor by improving the defects caused by the bond foreign matter, and to maximize the productivity by simplifying the assembly process of the pulling plate.

100: motor 110: base assembly for the motor
112: base member 113: fixed portion
113a: inner fixation 113b: outer fixation
114: pulling plate 116: coil
118: core 120: shaft
122: sleeve 130: hub
140: magnet

Claims (8)

A base member to which the shaft system of the motor is mounted;
A pulling plate coupled to the base member to prevent over-injury of the rotating member of the motor; And
And a fixing part protruding from the base member to press the pulling plate.
The method of claim 1,
At least one of the fixing portion and the pulling plate is a motor base assembly that is continuously formed in the circumferential direction to correspond to the magnet for generating a rotational driving force of the motor.
The method of claim 1,
And the fixing part is in contact with the inner and outer surfaces of the pulling plate.
The method of claim 1,
The inner space of the fixing unit has a width less than the width of the pooling plate so that the pooling plate is pressed in and fixed.
The method of claim 1,
The fixing part is a base assembly for a motor protruding to the upper side of the pulling plate after the pulling plate is fixed by pressing.
The method of claim 5,
The fixing part protruding upward of the pulling plate is bent to the upper surface of the pulling plate to fix the pulling plate to press the upper surface of the pulling plate.
The method of claim 5,
The fixing part protruding to the upper side of the pulling plate is a base assembly for a motor which is caulked to fix the pulling plate.
A base assembly for a motor according to any one of claims 1 to 7;
A core coupled to the base member, the core being wound to generate a rotational driving force; And
And a hub coupled to the shaft system and having a magnet facing the coil.
KR1020110043358A 2011-05-09 2011-05-09 Base assembly for motor and motor including the same KR20120125737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110043358A KR20120125737A (en) 2011-05-09 2011-05-09 Base assembly for motor and motor including the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110043358A KR20120125737A (en) 2011-05-09 2011-05-09 Base assembly for motor and motor including the same

Publications (1)

Publication Number Publication Date
KR20120125737A true KR20120125737A (en) 2012-11-19

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Family Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170039385A (en) * 2015-10-01 2017-04-11 엘지이노텍 주식회사 Sensing magnet assembly and Motor having the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170039385A (en) * 2015-10-01 2017-04-11 엘지이노텍 주식회사 Sensing magnet assembly and Motor having the same

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