Hydrodynamic bearing device, method for manufacturing the same, spindle motor and recording and reproduction apparatus

A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing device 4 includes a lube rep...

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Bibliographische Detailangaben
1. Verfasser:	KAINOH NAOSHI,SHIRAI AKIHITO,OBATA SHIGEO,NISHIMOTO YOUICHI,NAKAMURA JUNICHI,HAGA TOMOHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing device 4 includes a lube repellant 11 a which is applied in a circular shape by a predetermined distance in a radial direction from a portion of an upper surface of a second thrust flange 41 c where it is connected to a shaft 41 and a lube repellant 11 b which is applied in a circular shape on an outer peripheral surface of the second thrust flange 41 c below from an upper end in the radial direction by a predetermined distance. The lube repellant 11 b is applied near the upper end portion in a gap formed between the outer peripheral surface of the second thrust flange 41 c and an inner peripheral surface of an outer sleeve 44.