Invention Grant
US08675304B2 Disk drive spindle motor with hole volume and component density relationship
有权
磁盘驱动主轴电机具有孔体积和组件密度的关系
- Patent Title: Disk drive spindle motor with hole volume and component density relationship
- Patent Title (中): 磁盘驱动主轴电机具有孔体积和组件密度的关系
-
Application No.: US13353557Application Date: 2012-01-19
-
Publication No.: US08675304B2Publication Date: 2014-03-18
- Inventor: Takehito Tamaoka , Kazushi Miura , Mitsuhiro Takemoto
- Applicant: Takehito Tamaoka , Kazushi Miura , Mitsuhiro Takemoto
- Applicant Address: JP Kyoto
- Assignee: Nidec Corporation
- Current Assignee: Nidec Corporation
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2011-080144 20110331; JP2011-171771 20110805
- Main IPC: G11B19/20
- IPC: G11B19/20 ; G11B25/04 ; H02K5/04 ; H02K5/16 ; H02K5/24 ; F16C17/10 ; F16C33/10
Abstract:
A motor includes a stationary portion and a rotating portion. The rotating portion includes a sleeve portion including one communicating hole arranged to extend completely there through from an upper surface to a lower surface thereof, and a cover portion including a hole portion. The axial extension range of the hole portion is arranged to overlap with the axial extension range of the communicating hole in a radial direction. A center of the hole portion is arranged on a plane including a central axis and a center of the communicating hole. The communicating hole and the hole portion are arranged on opposite sides of the central axis. The following inequality is satisfied: V2
Public/Granted literature
- US20120250183A1 MOTOR AND STORAGE DISK DRIVE Public/Granted day:2012-10-04
Information query
IPC分类:
