Minebea Company, Limited

Hitachi Powdered Metals Co., Ltd.

Other

Jun Hirose

Katsutoshi Nii

Noriyuki Yoshimura

Hidekazu Tokushima

Toshikazu Takehana

Kazuo Hokkirigawa

Hideo Shikata

Tadayoshi Yano

Shunichi Togashi

The spindle motor includes a rotational shaftwhich has a conical portion, whose outer surface gradually widens toward a thrust dynamic pressure bearing, and a straight portionwith a fixed outer diameter. Radial dynamic pressure bearingsupports the radial load of the rotating shaft. The radial bearing has a conical bearing surfaceand a straight bearing surfacecorresponding to the conical portionand the straight portionof the rotating shaft, respectively. Rotating shaftis supported and aligned during rotation by fluid dynamic forces generated by the conical portion

Spindle motor

A bearing unit comprises a bearingformed of a sintered metal in which a magnetized magnetic powder is dispersed in its matrix and at least pores exposed on a bearing surface thereof are sealed by impregnation with a resin; a non-magnetic housingaccommodating the bearing; and a lubricating fluid M made of a magnetic fluid.

Bearing unit, production method therefor and spindle motor

A road paving material includes an aggregate, asphalt, and fine ceramic particles selected from the group consisting of RBC particles, CRBC particles, and mixtures thereof.

Road paving material and method

A production method for a sintered bearing, comprises compacting a raw metallic material powder into a bearing green compact; sintering the green compact into a sintered compact; and forming a resin coating over the entire surface of the sintered compact by electrodeposition.

Sintered bearing and production method therefor

A spindle motor comprises a housing including a through hole with a pair of apertures, one of the apertures being closed by a thrust plate and the other aperture being open; a bearing accommodated in the housing a rotating shaft inserted into the bearing a displacement restraining structure for restraining movement of the rotating shaft toward the open aperture by engaging the rotation shaft with the bearing a rotating member secured to the rotating shaft; and a motor generating electromagnetic function for rotating the rotating member. The through hole of the housing includes a large diameter portion A at the thrust plate side and a small diameter portion B at the open aperture side, and a stepped portion is formed at a transition portion between the large diameter portion A and the small diameter portion B. At least a portion of the bearing is located at the large diameter portion A side of the housing and engages with the stepped portion of the housing

Growing community of inventors

Kitasaku-gun, Japan

Jun Hirose