Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Youichi Nishimoto

Naoshi Kainoh

Shigeo Obata

Junichi Nakamura

Akihito Shirai

Tomohiro Haga

Tsuyoshi Matsumoto

A hydrodynamic bearing devicecomprises a shaft, a second thrust flange, a sleeve, a radial bearing, and a thrust bearing. The second thrust flangeis fixed near one end of the shaft. A third cylindrical protrusionthat protrudes farther in the axial direction than the second thrust flange is fixed to or integrally machined at one end of the sleeve. A notchthat communicates between a radial inner space and a radial outer space separated by the third cylindrical protrusionis provided to the third cylindrical protrusion

Hydrodynamic bearing device, motor, recording disc driving apparatus and assembly jig

A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing deviceincludes a lube repellantwhich is applied in a circular shape by a predetermined distance in a radial direction from a portion of an upper surface of a second thrust flangewhere it is connected to a shaftand a lube repellantwhich is applied in a circular shape on an outer peripheral surface of the second thrust flangebelow from an upper end in the radial direction by a predetermined distance. The lube repellantis applied near the upper end portion in a gap formed between the outer peripheral surface of the second thrust flangeand an inner peripheral surface of an outer sleeve

Hydrodynamic bearing device, method for manufacturing the same, spindle motor and recording and reproduction apparatus

Growing community of inventors

Ehime-ken, Japan

Youichi Nishimoto