Loading patent…
AssigneeMINEBEA MITSUMI Inc.
InventorsAtsushi Yanagawa, Andreas Kull, Thomas Fuss
Estimating the term…
The invention relates to a fluid dynamic bearing system, comprising a bearing bush and a shaft rotatably supported in the bearing bush, wherein an annular pressure plate is arranged at the shaft and wherein a bearing gap is formed which is filled with a bearing fluid, and wherein at least one fluid dynamic axial bearing is formed between an end face of the pressure plate and an end face of a cover plate, wherein the fluid dynamic axial bearing has groove structures provided on the pressure plate or the cover plate wherein, in the connection or junction region between the shaft and the pressure plate, at least one axially extending recess or hole is present, wherein the opening of the recess or hole of the pressure plate and the groove structure of the axial bearing do not overlap in the radial direction.
A fluid dynamic bearing system, comprising a bearing bush and a shaft rotatably supported in the bearing bush, wherein an annular pressure plate is arranged at the shaft, the annular pressure plate being rotatable together with the shaft in a recess of the bearing bush provided for that purpose, and wherein a bearing gap is formed between these bearing components rotatable with respect to each other, the bearing gap being filled with a bearing fluid, and wherein surfaces of the shaft and the bearing bush facing each other form at least one fluid dynamic radial bearing and an end face of the annular pressure plate together with an opposite end face of a cover plate forms at least one fluid dynamic axial bearing, wherein the at least one fluid dynamic axial bearing has groove structures provided on the end face of the annular pressure plate or the end face of the cover plate or on both components, wherein, in a junction region between the shaft and the annular pressure plate, at least two recesses or holes are present which are arranged along a circular line of the annular pressure plate and form different angles between them, wherein the at least two recesses or holes are irregularly spaced and axially extending, wherein an opening of the at least two recesses or holes of the annular pressure plate and the groove structure of the at least one fluid dynamic axial bearing do not overlap in a radial direction, wherein the opening of the at least two recesses or holes of the annular pressure plate is situated opposite an annular depression present in the end face of the cover plate, wherein the groove structure (32a) of the at least one fluid dynamic axial bearing and the annular depression have the same depth.
A fluid dynamic bearing system, comprising a bearing bush and a shaft rotatably supported in the bearing bush, wherein an annular pressure plate is arranged at the shaft, the annular pressure plate being rotatable together with the shaft in a recess of the bearing bush provided for that purpose, and wherein a bearing gap is formed between these bearing components rotatable with respect to each other, the bearing gap being filled with a bearing fluid, and wherein surfaces of the shaft and the bearing bush facing each other form at least one fluid dynamic radial bearing and an end face of the annular pressure plate together with an opposite end face of a cover plate forms at least one fluid dynamic axial bearing, wherein the at least one fluid dynamic axial bearing has groove structures provided on the end face of the annular pressure plate or the end face of the cover plate or on both components, wherein, in a junction region between the shaft and the annular pressure plate, at least two axially extending recesses or holes are present, wherein the at least two axially extending recesses or holes are arranged along a circular line of the annular pressure plate in an at least partially irregularly distributed manner and form different angles between them.
A spindle motor comprising a fluid dynamic bearing system, the fluid dynamic bearing system comprising a bearing bush and a shaft rotatably supported in the bearing bush, wherein an annular pressure plate is arranged at the shaft, the annular pressure plate being rotatable together with the shaft in a recess of the bearing bush provided for that purpose, and wherein a bearing gap is formed between these bearing components rotatable with respect to each other, the bearing gap being filled with a bearing fluid, and wherein surfaces of the shaft and the bearing bush facing each other form at least one fluid dynamic radial bearing and an end face of the annular pressure plate together with an opposite end face of a cover plate forms at least one fluid dynamic axial bearing, wherein the at least one fluid dynamic axial bearing has groove structures provided on the end face of the annular pressure plate or the end face of the cover plate or on both components, wherein, in a junction region between the shaft and the annular pressure plate, at least two recesses or holes are present which are arranged along a circular line of the annular pressure plate and form different angles between them, wherein the at least two recesses or holes are irregularly spaced and axially extending, wherein an opening of the at least two recesses or holes of the annular pressure plate and the groove structure of the at least one fluid dynamic axial bearing do not overlap in a radial direction, wherein the opening of the at least two recesses or holes of the annular pressure plate is situated opposite an annular depression present in the end face of the cover plate, wherein the groove structure of the at least one fluid dynamic axial bearing and the annular depression have the same depth.
A spindle motor comprising a fluid dynamic bearing system, the fluid dynamic bearing system comprising a bearing bush and a shaft rotatably supported in the bearing bush, wherein an annular pressure plate is arranged at the shaft the annular pressure plate being rotatable together with the shaft in a recess of the bearing bush provided for that purpose, and wherein a bearing gap is formed between these bearing components rotatable with respect to each other, the bearing gap being filled with a bearing fluid, and wherein surfaces of the shaft and the bearing bush facing each other form at least one fluid dynamic radial bearing and an end face of the annular pressure plate together with an opposite end face of a cover plate forms at least one fluid dynamic axial bearing, wherein the at least one fluid dynamic axial bearing has groove structures provided on the end face of the annular pressure plate or the end face of the cover plate or on both components, wherein, in a junction region between the shaft and the annular pressure plate, at least two recesses or holes are present, the at least two recesses or holes being axially extending, wherein the at least two recesses or holes are arranged along a circular line of the annular pressure plate in an at least partially irregularly distributed manner and form different angles between them.
Dependencies are inferred from the claim text.