Patent ID: 7147376
Filing Date: 2006-12-12
Classification: F16C,G11B

Abstract:
1. A dynamic bearing device comprising: a housing; a bearing sleeve provided inside the housing; a rotating member rotating relative to the bearing sleeve; and a dynamic bearing portion supporting the rotating member in a non-contact manner by dynamic pressure action of a lubricating fluid generated in a bearing gap between the bearing sleeve and the rotating member, wherein the bearing sleeve has a parent body formed of a sintered metal, and radial bearing surfaces formed on an inner peripheral surface of the bearing sleeve, the radial bearing surfaces being formed by a resin layer, the resin layer being formed with dynamic pressure generating grooves, and wherein the lubricating fluid is allowed to pass a region between the radial bearing surfaces to exude from internal pores of the parent body into a gap between the inner peripheral surface of the bearing sleeve and an outer peripheral surface of the rotating member.