DISK STORE DRIVE

摘要

A disk store drive has a brushless drive motor having a stator (10) provided with a winding (27), and an external rotor coaxially surrounding the stator and spaced therefrom by a substantially cylindrical air gap and having a permanent magnetic motor magnet (13) and a soft magnetic yoke (17). A hub (37) is concentric to the yoke and is connected in non-rotary manner to the latter. The hub has a disk support portion (36), which can be passed through a central opening of storage disk (39) for receiving at least one storage disk arranged in a clean area (49). At least half of the axial longitudinal size of the stator winding and the motor magnet cooperating therewith are housed within the area (46) surrounded by the disk support portion of the hub to reduce the space requirement for the drive. It is preferred that the wall thickness of the disk support portion of the hub is no greater than that of the adjacent circumferential wall (17B) of the yoke.