Rotating apparatus capable of improving the shock resistance and method for manufacturing the rotating apparatus
AssigneeSamsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
InventorsMitsuo KODAMA, Ryusuke Sugiki, Akira Aoi
Life of this patent
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Abstract
A disk drive device includes a hub, a base plate, and a bearing unit. The bearing unit includes a shaft housing member, joined to the hub, having a through-hole in the center, a shaft having a smaller diameter section and a larger diameter section, a radial dynamic pressure grooves, and a lubricant agent. The opening shape of bearing hole of the base plate is so formed as to be larger than the outer shape of the larger diameter section. In the bearing unit, the larger diameter section of the bearing unit is fixed by a hardening resin present between the bearing unit and the bearing hole.
Claims19
A rotating apparatus comprising:
- a rotatable rotor including a hub on which a recording disk is to be placed, and a shaft housing portion having a through-hole in a center;
- a base plate having a base circular part extending in an axial direction of the hub wherein an inner circumferential surface of the base circular part is used as a bearing hole;
- a shaft including a cylindrical section housed in the through-hole, an extending section formed integrally with the cylindrical section so as to extend radially outwardly from a first end of the cylindrical section, and an annular section provided so as to extend radially outwardly from a second end of the cylindrical section remote from the extending section;
- and
- a groove that is configured to generate a radial dynamic pressure in a lubricant and that is provided on an inner circumferential surface of the through-hole,
- wherein the rotatable rotor includes a portion which encircles at least part of the annular section,
- wherein an opening of the bearing hole is formed such that the opening surrounds a part of the shaft housing portion, and
- wherein the extending section is inserted and fixed into the opening, a hardening resin is interposed between the opening and the extending section.
A rotating apparatus comprising:
- a rotatable rotor including a shaft housing portion having a through-hole in a center;
- a base having a base circular part extending in an axial direction of the rotatable rotor wherein an inner circumferential surface of the base circular part is used as a bearing hole;
- a shaft including a cylindrical section housed in the through-hole, an extending section formed integrally with the cylindrical section so as to extend radially outwardly from a first end of the cylindrical section, and an annular section provided so as to extend radially outwardly from a second end of the cylindrical section remote from the extending section;
- and
- a groove that is configured to generate a radial dynamic pressure in a lubricant and that is provided on an inner circumferential surface of the through-hole,
- wherein the rotatable rotor includes a portion which encircles at least part of the annular section,
- wherein an opening of the bearing hole is formed such that the opening surrounds a part of the shaft housing portion, and
- wherein the extending section is inserted and fixed into the opening, a hardening resin is interposed between the opening and the extending section.
Dependencies are inferred from the claim text.