发明名称 |
Spindle motor |
摘要 |
There is provided a means for preventing wear caused by the contacting/sliding of a thrust hydrodynamic gas bearing surface when a spindle motor is started. A cylinder 4 of a radial hydrodynamic gas bearing that has radial hydrodynamic grooves in an outer circumferential surface thereof and a disk 3 of a thrust hydrodynamic gas bearing that has thrust hydrodynamic grooves in an upper face thereof are disposed on an upper end of an axial center of a stator core 2 having a stator 2a around which a motor coil 7 is wound, a hollow cylinder 6 whose inner surface facing the cylinder 4 of the radial hydrodynamic gas bearing is smooth and a rotor magnet 8 facing the motor coil 7 are disposed on a hub 5 acting as a rotational member, a load in a radial direction is supported by the radial hydrodynamic gas bearing, and a load in a thrust direction is supported by using the thrust hydrodynamic gas bearing together with a magnetic bearing consisting of the stator 2a and the rotor magnet 8.
|
申请公布号 |
US2002180289(A1) |
申请公布日期 |
2002.12.05 |
申请号 |
US20020164631 |
申请日期 |
2002.06.10 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
KOMURA OSAMU;TAKEUCHI HISAO;OTSUKI MAKOTO;MURABE KAORU |
分类号 |
F16C17/10;F16C32/00;F16C33/10;F16C39/06;G11B19/20;H02K5/16;H02K7/08;H02K7/09;(IPC1-7):H02K5/16;H02K7/00 |
主分类号 |
F16C17/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|