SPINDLE MOTOR

PROBLEM TO BE SOLVED: To provide a spindle motor that can prevent outflow of lubricating oil when dynamic pressure is generated, with simple and low-cost structure. SOLUTION: The spindle motor comprises: a dynamic pressure radial bearing constituted of an outer peripheral portion of a shaft 2A and a...

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Bibliographic Details
Main Author KODAMA MITSUO
Format Patent
LanguageEnglish
Published 18.09.2002
Edition7
Subjects
BEARINGS
BLASTING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
GENERATION
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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Summary:PROBLEM TO BE SOLVED: To provide a spindle motor that can prevent outflow of lubricating oil when dynamic pressure is generated, with simple and low-cost structure. SOLUTION: The spindle motor comprises: a dynamic pressure radial bearing constituted of an outer peripheral portion of a shaft 2A and an inner peripheral portion of a sleeve 6A; and a dynamic pressure thrust bearing constituted of a thrust plate 7 stuck to an end portion of the sleeve 6A, and an end portion of the shaft 2A. A first tapered face 2Ad of a tapered angle θ1 is formed on an outer peripheral face 2Ac of the shaft 2A, and a second tapered face 6Ad of a tapered angle θ2 is formed on an inner peripheral face 6Aa of the sleeve 6A. The relation between the tapered angle θ1 and θ2 satisfies θ1>θ2.
Bibliography:Application Number: JP20010070013