Patent
Dynamic pressure type fluid bearing
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In this article, a dynamic pressure type fluid bearing comprises a housing provided with a cylindrical hole having cylindrically shaped inner bearing surface and a bottom bearing surface for thrust load.Abstract:
A dynamic pressure type fluid bearing comprises a housing provided with a cylindrical hole having a cylindrically shaped inner bearing surface for radial load and a bottom bearing surface for thrust load, and a shaft disposed in the cylindrical hole and having a cylindrically shaped outer bearing surface for radial load opposed to and cooperative with the inner bearing surface and an end bearing surface for thrust load opposed to and cooperative with the bottom bearing surface. At least one of the inner bearing surface and the outer bearing surface is provided with grooves for generating a dynamic pressure. A communication hole is provided in the bottom bearing surface and opens to the outside of the housing. The bottom bearing surface has around the communication hole an annular contact bearing surface which contacts the end bearing surface when the bearing is stationary.read more
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Dynamic pressure bearing device
Abstract: A dynamic pressure bearing device includes a sleeve and a shaft member which is rotatably fitted into the sleeve. The sleeve is made of an aluminum alloy containing a carbon fiber and has a radial bearing surface formed in an inner peripheral surface and a thrust bearing surface formed in a lower end surface. The shaft member includes a base portion having a thrust receiving surface formed on an upper surface, and a shaft portion extending upright from the base portion and having a radial receiving surface formed on an outer peripheral surface. A first dynamic pressure generating groove is formed in at least one of the radial bearing surface and the radial receiving surface, and a second dynamic pressure generating groove is formed in at least one of the thrust bearing surface and the thrust receiving surface. The shaft member including the shaft portion and the base portion is molded from a synthetic resin as a unitary body. The thrust bearing surface is tapered so that a thrust bearing gap formed between the thrust bearing surface and the thrust receiving surface increases gradually, radially and outwardly.
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Patent
Method of manufacturing a disk drive spindle motor
TL;DR: In a spindle motor for a driving a memory disk, a closed space formed by a sleeve metal, an end portion of a shaft and a thrust plate is connected to outside open space by a connection path as discussed by the authors.
Patent
Dynamic pressure type fluid bearing device
Katsuhiko Tanaka,Ikunori Sakatani,Takeyuki Yoshiba,Takanobu Sato,Haginuma Kiyoshi,Toshimi Takajou,Hiromi Sugi +6 more
TL;DR: In this paper, the authors describe a dynamic pressure generating groove of a spiral shape formed in at least one of the radial bearing surface and ther radial receiving surface of a cylindrical housing.
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Simplified conical bearing with independent flow paths
Samnathan Murthy,Alan Lyndon Grantz,Steve Parsoneault,Roger A. Addy,Peter R. Riegler,Mohamed Mizanur Rahman +5 more
TL;DR: In this paper, a hydrodynamic bearing is incorporated into a spindle motor or the like, where the bearing includes a stationary shaft and two independent bearings, comprising a top cone and a bottom cone separated by a segment of the shaft.
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Hydrodynamic bearing for axial and radial loads
TL;DR: In this paper, a bearing for radial and axial loads comprising a bearing member having a cylindrical bore 4 and a wall 6 at the end of the bore normal to the axis of the bearing, and a shaft 1 which engages with the bore and has an end face 5 that bears against the end wall of the bimodal bearing member.
Patent
Fluid bearing including both hydrodynamic and hydrostatic bearings
TL;DR: In this article, a fluid bearing for rotatably supporting a rotary shaft comprising a hydrodynamic bearing formed on a loaded side and a hydrostatic bearing is formed in axially juxtaposed relationship with the hydrogynamic bearing.
Patent
Self-lubricating plain bearing
TL;DR: In this paper, a self-lubricating plain bearing for a shaft has a bore in which a bearing sleeve is disposed for rotatably supporting the shaft, and a portion thereof which is further inward than the sleeve is a lubricant-impregnated porous member.