Ntn Corporation

Makoto Shiranami

Natsuhiko Mori

Kazuo Okamura

Isao Komori

Yasuhiro Yamamoto

The porous oil-impregnated bearingcomprises a bearing bodymade of a porous material, and oil retained in the pores of the bearing bodyby impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing bodyis formed with a bearing surfaceopposed to an outer peripheral surface of a shaft to be supported, with a bearing clearance defined therebetween. The bearing surfacehas a first region min which a plurality of hydrodynamic pressure generating groovesinclined in one direction with respect to the axial direction are circumferentially disposed, a second region mwhich is axially spaced from said first region mand in which a plurality of hydrodynamic pressure generating groovesinclined in the other direction with respect to the axial direction are circumferentially disposed, and an annular smooth region n disposed between the first and second regions mand m

Hydrodynamic type porous oil-impregnated bearing

Method of producing a sintered oil retaining bearing

The porous oil-impregnated bearing comprises a bearing body made of a porous material, and oil retained in the pores of the bearing body by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body is formed with a bearing surface opposed to an outer peripheral surface of a shaft to be supported, with a bearing clearance defined therebetween. The bearing surface has a first region m in which a plurality of hydrodynamic pressure generating grooves inclined in one direction with respect to the axial direction are circumferentially disposed, a second region m which is axially spaced from said first region m and in which a plurality of hydrodynamic pressure generating grooves inclined in the other direction with respect to the axial direction are circumferentially disposed, and an annular smooth region n disposed between the first and second regions m and m

Sintered oil retaining bearing and spindle motor for information equipment

The porous oil-impregnated bearing,comprises a bearing body,made of a porous material, and oil retained in the pores of the bearing body,by impregnation with lubricating oil or lubricating grease. The inner peripheral surface of the bearing body,is formed with a bearing surface,opposed to an outer peripheral surface of a shaft to be supported, with a bearing clearance defined therebetween. The bearing surface,has a first region m,in which a plurality of hydrodynamic pressure generating grooves,inclined in one direction with respect to the axial direction are circumferentially disposed, a second region m,which is axially spaced from said first region m,and in which a plurality of hydrodynamic pressure generating grooves,inclined in the other direction with respect to the axial direction are circumferentially disposed, and an annular smooth region n disposed between the first and second regions m,and m

Growing community of inventors

Inazawa, Japan

Makoto Shiranami