Samsung Electro-Mechanics Co., Ltd.

Jee Ae Noh

Ta Kyoung Lee

Sang Jin Park

Bum Cho Kim

There is provided a hydrodynamic bearing assembly including: a sleeve having a shaft inserted thereinto and supported thereby; a thrust plate coupled to one end of the shaft; an extension part formed at the thrust plate to be extended in an axial direction so as to be coupled to the shaft; and a coupling part formed at the shaft to contact an inner surface of the extension part so as to be coupled to the extension part.

Hydrodynamic bearing assembly and motor including the same

There are provided a motor and a recording disc driving device, which may improve a coupling structure of the motor to enable a magnet provided in a rotor to thereby double as a conventional stopper. The motor may include: a sleeve into which a shaft is rotatably inserted; a sleeve holder including a body part into which the sleeve is inserted, and a flange part protruded from an upper end portion of the body part in an outer diameter direction; a rotor case fastened to an upper end portion of the shaft, and formed such that a cylindrically shaped-rotor main wall is protruded downwardly in an axial direction to receive the flange part; a magnet fastened to a distal end of the rotor main wall so that a part of the magnet is protruded downwardly of the flange part; and a stator fastened to face the magnet, and generating an electromagnetic force.

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Seoul, South Korea

Jee Ae Noh