HYDRAULIC DYNAMIC PRESSURE BEARING DEVICE HAVING SMOKE PIPE, SPINDLE MOTOR, AND DISK DRIVING DEVICE HAVING THE SPINDLE MOTOR CAPABLE OF RESTRAINING AND PREVENTING THE GENERATION OF AIR BUBBLE IN LUBRICANT

摘要

PURPOSE: A hydraulic dynamic pressure bearing device having smoke pipe, spindle motor, and a disk driving device having the spindle motor are provided to prevent the restraining of rotation accuracy of hydraulic dynamic pressure bearing device.;CONSTITUTION: A hydraulic dynamic pressure bearing device comprises a fixed bearing unit(103), and a rotary bearing unit(104). The bearing unit comprises a sleeve unit(137) comprising a bearing hole counting a shaft unit. The sleeve unit comprises a top inlet(162a), and a connected path(162). The rotary bearing unit comprises shaft and an outside rotation unit.;COPYRIGHT KIPO 2012