BLOCK FOR SWING ARM, AND DISK DRIVE DEVICE

PROBLEM TO BE SOLVED: To drive a rotating body at a high speed, and stabilize the friction torque thereof. SOLUTION: A bearing device 8 includes: a sleeve 27 having a protrusion integrally formed at a center of an inside face and protruding toward the center, and two ball bearings 25, 26 each having...

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Bibliographische Detailangaben
1. Verfasser:	YOKOO YOSHINARI
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 INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LIGHTING MECHANICAL ENGINEERING PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To drive a rotating body at a high speed, and stabilize the friction torque thereof. SOLUTION: A bearing device 8 includes: a sleeve 27 having a protrusion integrally formed at a center of an inside face and protruding toward the center, and two ball bearings 25, 26 each having an axial end of an outer ring in contact with a step section formed at both sides of the protrusion. The material of the sleeve is a heat-treated aluminum silicon alloy including an aluminum of 60 to 90 wt.%, a silicon of 9 to 39 wt.%, and other metallic materials of 1 to 5 wt.%, where they total 100 wt.%. The density thereof is 2.52 to 2.66 g/cm3. A shaft 21 having a linear expansion coefficient smaller than that of the sleeve is inserted to the ball bearings. COPYRIGHT: (C)2009,JPO&INPIT