JP2016100031A5

JP2016100031A5 - Bearing device, pivot assembly bearing and hard disk drive

Info

Publication number: JP2016100031A5
Application number: JP2014234230A
Authority: JP
Filing date: 2014-11-19
Publication date: 2016-07-07
Anticipated expiration: 2034-11-19

Description

本発明は磁気ディスク駆動装置等に使用されるピボットアッシー軸受等に好適な軸受装置に係り、特にラビリンス隙間によるシール構造に関する。 The present invention relates to a bearing device suitable for a pivot assembly bearing or the like used for a magnetic disk drive or the like, and more particularly to a seal structure using a labyrinth gap.

本発明は上記に鑑みてなされたものであってその主たる目的は、潤滑油の漏洩や飛散の抑制あるいは異物の混入抑制のための、より狭いラビリンス隙間を容易に形成することができ、これによりハードディスク駆動装置内の清浄度を維持できるピボットアッシー軸受等に好適な軸受装置を提供することにある。 The present invention has been made in view of the above, and its main purpose is to easily form a narrower labyrinth gap for suppressing the leakage and scattering of lubricating oil or the mixing of foreign substances. An object of the present invention is to provide a bearing device suitable for a pivot assembly bearing or the like that can maintain cleanliness in a hard disk drive.

本発明の軸受装置は、スリーブと、該スリーブ内に挿入され、一端部にフランジ部が一体に形成されたシャフトと、前記スリーブと前記シャフトとの間に軸方向に離間して配設され、該スリーブと該シャフトとを相対回転自在に支持する一対の転がり軸受と、を備え、前記スリーブの、前記フランジ部とは軸方向反対側の端部の内周面に、径方向内側に向かって延在して前記シャフトの外周面との間にラビリンス隙間を形成するシール部が一体に形成されていることを特徴とする（請求項１）。 The bearing device of the present invention is provided with a sleeve, a shaft that is inserted into the sleeve, and a flange portion is integrally formed at one end, and is axially spaced between the sleeve and the shaft. A pair of rolling bearings that support the sleeve and the shaft so as to be relatively rotatable, and radially inward of an inner peripheral surface of an end portion of the sleeve opposite to the flange portion in the axial direction. A seal portion that extends and forms a labyrinth gap with the outer peripheral surface of the shaft is integrally formed (Claim 1).

本発明によれば、シール部がスリーブに一体に形成されている。このため、シール部をスリーブに接着等の手段によって固定する作業が不要となるとともに、接着材の使用量が減ってアウトガスの低減が図られる。また、シール部の位置や形状を高精度に調整することができることから、軸受装置を組み立てた際の誤差が小さくなり、このため、ラビリンス隙間を従来より狭く形成することができ、結果として潤滑油の漏洩や飛散の抑制や異物の混入抑制といったシール効果を高めることができる。 According to the present invention, the seal portion is formed integrally with the sleeve. This eliminates the need for fixing the seal portion to the sleeve by means such as adhesion, and reduces the amount of adhesive used and reduces outgas. In addition, since the position and shape of the seal portion can be adjusted with high accuracy, errors in assembling the bearing device are reduced, and therefore, the labyrinth gap can be formed narrower than before, resulting in the lubricating oil. Sealing effects such as suppression of leakage and scattering of particles and suppression of mixing of foreign matters can be enhanced.

次に、本発明のピボットアッシー軸受は、磁気ディスク上で磁気ヘッドを移動させる磁気ヘッドアームを揺動可能に支持するピボットアッシー軸受であって、請求項１または２に記載の軸受装置の構成を含むことを特徴とする（請求項３）。
次に、本発明のハードディスク駆動装置は、請求項３に記載のピボットアッシー軸受を備えたことを特徴とする（請求項４）。 Next, a pivot assembly bearing according to the present invention is a pivot assembly bearing that swingably supports a magnetic head arm that moves a magnetic head on a magnetic disk, and has the configuration of the bearing device according to claim 1. (Claim 3).
Next, a hard disk drive device according to the present invention includes the pivot assembly bearing according to claim 3 (claim 4).

本発明によれば、潤滑油の漏洩や飛散の抑制あるいは異物の混入抑制のための、より狭いラビリンス隙間を容易に形成することができ、これによりハードディスク駆動装置内の清浄度を維持できるピボットアッシー軸受等に好適な軸受装置が提供されるといった効果を奏する。 According to the present invention, a pivot assembly that can easily form a narrower labyrinth gap for suppressing leakage and scattering of lubricating oil or for preventing foreign matter from being mixed, thereby maintaining cleanliness in the hard disk drive. There is an effect that a bearing device suitable for a bearing or the like is provided.

以下、図面を参照して本発明の一実施形態を説明する。
［１］一実施形態の構成
図１（ａ）は、一実施形態に係るピボットアッシー軸受（軸受装置）１０が適用されたコンピュータの記憶装置の一つであるハードディスク駆動装置１を示している。このハードディスク駆動装置１においては、ピボットアッシー軸受１０に揺動可能に支持された磁気ヘッドアーム３の先端に設けられた磁気ヘッド４が磁気ディスク５上を移動することにより、情報を磁気ディスク５に記録し、また、記録した情報を磁気ディスク５から読み出す。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[1] Configuration of One Embodiment FIG. 1A shows a hard disk drive 1 which is one of storage devices of a computer to which a pivot assembly bearing (bearing device) 10 according to an embodiment is applied. In this hard disk drive 1, the magnetic head 4 provided at the tip of the magnetic head arm 3 slidably supported by the pivot assembly bearing 10 moves on the magnetic disk 5, so that information is transferred to the magnetic disk 5. Recording is performed, and the recorded information is read from the magnetic disk 5.

Claims

Sleeve,
A shaft inserted into the sleeve and having a flange portion integrally formed at one end;
A pair of rolling bearings disposed between the sleeve and the shaft so as to be spaced apart in the axial direction and supporting the sleeve and the shaft so as to be relatively rotatable;
With
A seal portion that extends radially inward and forms a labyrinth gap with the outer peripheral surface of the shaft is integrally formed on the inner peripheral surface of the end portion of the sleeve opposite to the flange portion in the axial direction. It is formed in the bearing apparatus characterized by the above-mentioned.

2. The bearing device according to claim 1, wherein a step portion is formed on the inner side in the axial direction of the seal portion so that a thickness on an inner peripheral side close to the shaft is larger than a thickness on an outer peripheral side. .

A magnetic head arm for moving the magnetic head over the magnetic disk a swingably supported to Lupi bot assembly bearing, a pivot assembly bearing that includes the configuration of the bearing device according to claim 1 or 2.

A hard disk drive comprising the pivot assembly bearing according to claim 3.