Spindle motor having labyrinth seal

Details Spindle motor having labyrinth seal Spindle motor having labyrinth seal

1996-08-06

1999-03-09

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 310156, 310261, H02K 700

Patent

active

058805435

ABSTRACT:
The invention relates to a structure of a spindle motor. The spindle motor comprises a housing assembly; a shaft fixed to the center portion of the housing assembly, a stator secured to the housing assembly around the shaft, a spindle hub having an inner cylindrical portion and an outer cylindrical portion, a rotor magnet secured to a circumferential inner surface of the outer cylindrical portion of the spindle hub, and a pair of bearings provided around the shaft in the inner cylindrical portion; wherein the spindle hub has a flat plate portion formed in the center part thereof and the flat plate portion has an opening through which the shaft is passed, thereby the flat plate portion functions as a labyrinth seal.

REFERENCES:
patent: 5214326 (1993-05-01), Yonei
patent: 5281886 (1994-01-01), Ohta
patent: 5347189 (1994-09-01), Chuta et al.
patent: 5402023 (1995-03-01), Nakanishi et al.
patent: 5448119 (1995-09-01), Kono et al.
patent: 5483113 (1996-01-01), Sakuragi et al.

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