Title:
DYNAMIC PRESSURE SPINDLE UNIT
Document Type and Number:
Japanese Patent JPS60241518
Kind Code:
A
Abstract:
PURPOSE:To facilitate manufacture by fixing third and fourth permanent magnets for producing repulsion in the direction of thrust of a shaft onto a housing in the proximity of first and second permanent magnets. CONSTITUTION:A ring-shaped permanent magnet 24 is secured fixedly to the lower end of a rotary shaft 20 and a ring-shaped permanent magnet 23 is secured fixedly to the lower surface 25a of a housing 25 to surround a shaft hole 25b. Also, ring-shaped permanent magnets 21, 22 are fixed to rest in positions of balancing with the repulsion of the permanent magnets 23, 24. Thus, the rotary shaft is supported in the vertical direction by the permanent magnets without contacting any other bearings so that the lower end of the rotary shaft needs to be precisely worked for facilitating manufacture.
Inventors:
KUNII YOSHIMASA
Application Number:
JP9713384A
Publication Date:
November 30, 1985
Filing Date:
May 15, 1984
Export Citation:
Assignee:
FUJI XEROX CO LTD
International Classes:
F16C32/00; F16C39/06; (IPC1-7): F16C32/00; F16C39/06
Domestic Patent References:
| JPS4990144A | 1974-08-28 | |||
| JPS5843421A | 1983-03-14 |
Attorney, Agent or Firm:
Kimura Takahisa