Nidec Corporation

Osamu Wada

Norikazu Oguchi

Kazuto Miyajima

Yoshihiro Takemura

Tadahiro Tanaka

Shohei Fukunaga

The invention is a spindle motor including a rotor hub bearing a rotational load, lubricant-containing bearing systems rotatably supported by the rotor hub, and stator windings wound on a stationary member, so as to oppose the rotor magnet. At least a portion of the rotor hub is in a clean environment, with the motor substantially sealed by a sealing unit. The spindle motor has a leakage prevention unit which prevents the lubricant trying to leak out the bearing systems and out the motor, when centrifugal forces produced by a rotor hub rotating at a high speed are exerted on the lubricant.

Spindle motor with bearing system having fluid sealing and leakage

A spindle motor has a stationary shaft, a rotor hub rotatably supported by the stationary shaft via a bearing, a loop-like rotor magnet attached to the internal surface of the rotor hub, and a stator disposed to opposedly face the rotor magnet. The stationary shaft has an opening at its base end. A connector is fit into the opening, and a wire lead drawn from a coil of the stator is electrically connected to the connector. The connector is detachably coupled to a mating connector of an external unit. Through these connectors, the power is supplied to the coil from the external unit.

Growing community of inventors

Komagane, Japan

Osamu Wada