KR970024451A

KR970024451A - Spindle motor with pneumatic bearing

Info

Publication number: KR970024451A
Application number: KR1019950036996A
Authority: KR
Inventors: 유진형; 장동섭; 김남응
Original assignee: 이형도; 삼성전기주식회사
Priority date: 1995-10-25
Filing date: 1995-10-25
Publication date: 1997-05-30

Abstract

본 발명은 공기동압 베어링을 적용한 스핀들 모터에 관한 것이다. 스핀들 모터에 구비되는 베어링은 외주면에 그루우브를 형성한 샤프트, 샤프트의 상하부에 연결되며 안쪽면에 각각 그루우브를 형성한 트러스트 플레이트, 샤프트의 외주면에 조립되며 상하 트러스트 플레이트 사이에 지지되는 슬리브로 구성되는 공기동압 베어링을 구성하는 것을 특징으로 한다. 이에 따라 모터의 구조를 간단화하며, 윤활제가 필요없게 되며, 모터이 진동 및 소음이 작아지게 되며, 고속안정성이 높아지게 되머 제품의 신뢰도를 향상시킬 수 있게 되며, 고체마찰이 없게 되어 제품의 수명이 연장되는 등의 효과가 있다.The present invention relates to a spindle motor to which the pneumatic hydraulic bearing is applied. The bearing provided in the spindle motor is composed of a shaft formed with grooves on the outer circumferential surface, a thrust plate connected to the upper and lower parts of the shaft, and a sleeve which is assembled to the outer circumferential surface of the shaft and supported between the upper and lower thrust plates. Characterized in that it constitutes a pneumatic hydrodynamic bearing. This simplifies the structure of the motor, eliminates the need for lubricants, reduces the vibration and noise of the motor, increases the high-speed stability, and improves the reliability of the product. It has the effect of being.

Description

Spindle motor with pneumatic bearing

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 스핀들 모터의 구성 단면도로서 좌측부는 종래의 구성도이며, 우측부는 이 발명에 따른 구성도,1 is a cross-sectional view of the configuration of the spindle motor, the left side is a conventional configuration diagram, the right side is a configuration diagram according to the present invention,

제2도는 이 발명에 따른 스핀들 모터의 분해 사시도,2 is an exploded perspective view of the spindle motor according to the present invention,

제3도는 제2도의 조립 사시도,3 is an assembled perspective view of FIG.

제5도는 공기동압 베어링의 고정부에 반경방향의 하중을 지지하기 위한 그루우브 형상을 설명하기 위한 구성도.5 is a configuration diagram for explaining a groove shape for supporting a radial load on a fixed portion of the pneumatic hydrodynamic bearing.

Claims

In a spindle motor supported by a housing having a stator and a shaft having a bearing and a hub having a permanent magnet, the hub rotating around the shaft and the bearing, wherein the bearing has a spiral shape on an outer circumferential surface thereof. A pneumatic bearing consisting of a shaft formed with grooves of the shaft, upper and lower thrust plates connected to the upper and lower parts of the shaft, and having a magnetic spiral groove groove on the inner side thereof, and assembled to the outer circumferential surface of the shaft and supported between the upper and lower thrust plates. Spindle motor to which a pneumatic hydrodynamic bearing is applied.

The spindle motor of claim 1, wherein the groove formed on the thrust plate is formed in a convergent type.

The spindle motor of claim 1, wherein the groove formed on the thrust plate is formed in a divergence type.

The spindle motor of claim 1, wherein the sleeve is formed of a ceramic material such as alumina.

The spindle motor of claim 1, wherein the shaft and the upper and lower thrust plates form a hard ceramic coating such as TiN on a raw material of stainless steel.

※ Note: The disclosure is based on the initial application.