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Base plate, base unit, motor, disk drive apparatus and method of manufacturing base plate

Through the combination of stainless steel and aluminum materials and casting technology, a disk drive device substrate with a high Young's modulus is constructed, which solves the problems of reduced substrate rigidity and increased noise caused by thinning, and achieves more stable disk position and data reading and writing performance. .

Inactive Publication Date: 2014-01-15
NIDEC CORP(JP)
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  • Abstract
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Problems solved by technology

[0004] However, if the axial thickness of the substrate is thinned, the rigidity of the substrate will be weakened
If the rigidity of the substrate is weakened, the vibration and noise accompanying the motor drive will increase
In addition, the position of the disk becomes unstable, and data reading and writing errors may easily occur.

Method used

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  • Base plate, base unit, motor, disk drive apparatus and method of manufacturing base plate
  • Base plate, base unit, motor, disk drive apparatus and method of manufacturing base plate
  • Base plate, base unit, motor, disk drive apparatus and method of manufacturing base plate

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Embodiment Construction

[0029] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, in this application, the direction parallel to the central axis of the motor is called "axial direction", and the direction perpendicular to the central axis of the motor is called "radial direction". The direction of the arc is called "circumferential". In addition, in the present application, the shape and positional relationship of each part will be described with the axial direction as the up-down direction and the opposing substrate with the stator side as the upward direction. However, the definition of the up-down direction is not intended to limit the directions during manufacture and use of the substrate, base unit, motor, and disk drive device according to preferred embodiments of the present invention.

[0030] Also, the "parallel direction" in the present application includes substantially parallel directions. In addition, the "orthogo...

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Abstract

The invention relates to a base plate, a base unit, a motor, a disk drive apparatus and a method of manufacturing the base plate. The base plate of the disk drive apparatus includes a motor base disposed around a central axis and a base body portion extending radially outward of the motor base. The motor base contains a metallic material of a first type. The base body portion contains a metallic material of a second type. Thus, the axial thickness of the portion of the base plate in the vicinity of the central axis can be reduced, and deterioration of the stiffness of the portion can be prevented. Besides, the base body portion is a casting product in which the motor base is an insert component. An upper protruding portion and a lower protruding portion are defined in one of an outer end portion of a bottom plate portion of the motor base and an inner end portion of the base body portion. In this way, extraction of the motor base in the axial direction can be prevented.

Description

technical field [0001] The present invention relates to a substrate, a base unit, a motor, a disk drive device, and a manufacturing method of the substrate. Background technique [0002] Conventionally, disk drive devices such as hard disk drives are known. A motor for rotating the disk is mounted on the disk drive device. For example, Japanese Laid-Open Publication No. 2012-005339 describes a conventional disk drive device. The disk drive device of this publication has a base that supports the integral constituent elements of the motor (paragraph 0031, figure 1 ). [0003] In recent years, there has been an increasing demand for thin notebook computers and tablet computers. Therefore, the disk drives mounted in these computers are also required to be thinner than before. In order to reduce the thickness of the disk drive device, it is preferable to reduce the axial thickness of the substrate supporting the motor. In particular, motor components such as a stator and a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/21G11B5/265
CPCB22D19/04H02K5/08H02K5/1675H02K11/33H02K5/225B22D25/02H02K5/02
Inventor 真角祐树藤绳顺三
Owner NIDEC CORP(JP)
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