Low overall height spindle motor used for driving hard disk drive used in mobile device e.g. laptop, has shaft that is connected to housing cover through joint of pin or is fixedly bonded to housing cover through pure material

摘要

The spindle motor has casing that includes a stationary motor component with shafts (12,16,18), a rotatable engine component (14), fluid dynamic bearing systems(22,24,28) for rotary mounting of a rotatable engine relative to the stationary motor component, electromagnetic drive systems (42,44) to drive the rotatable engine about rotational axis (40) and a housing cover (46) for closing spindle motor main portion. The shaft is connected to the housing cover through a joint of pin (48) or the shaft is fixedly bonded to housing cover through pure material.