SEALING MEANS FOR DYNAMIC PRESSURE BEARING

摘要

PROBLEM TO BE SOLVED: To reliably prevent leakage of lubrication fluid by a method wherein a sealing means to block leakage of lubrication fluid of a dynamic pressure bearing to the outside of a system is formed approximately in a cylindrical shape and provided with an inner wall surface, an outer wall surface, a drum part situated between the two wall surfaces, and a protrusion part protruding radially externally from the outer wall surface. ;SOLUTION: A sleeve member 26 is sleeve-fitted-in a shaft member 22, a thrust bush member 28 is situated on one end side of the shaft member 22, and the end part in a radial external direction of the member 28 is securely closely fitted in the recessed part 30 of the sleeve member 26. Further, a top cover member 32 is situated at the upper end part of the shaft member 22. A sealing means 36 is situated between the recessed part 30 and the thrust bush member 28 but the sealing member 36 is formed approximately in a cylindrical shape and a protrusion part protruding in a curve shape is integrally formed approximately in the central position of the outer wall surface. The inner wall surface of the sealing means 36 is formed in an inside diameter approximately equal to the diameter of a sealing means receiving part 38 in a manner to be fitted in the seal means receiving part 38 of the thrust bush member 28.;COPYRIGHT: (C)2001,JPO