Patent ID: 7740407
Filing Date: 2010-06-22
Classification: F16C

Abstract:
1. A hydrodynamic bearing type rotary device, comprising: a sleeve having a bearing hole, a shaft which is inserted into the bearing hole of the sleeve so as to be rotatable; a hub which is attached to one end of the shaft; a first lubricant reservoir which is formed between the hub and an end surface of the sleeve and which has a maximum gap s a radial bearing in which radial hydrodynamic grooves are formed on at least one of an outer peripheral surface of the shaft or an inner peripheral surface of the sleeve, and which has a gap g a second lubricant reservoir which has a maximum gap g a lubricant is held in the radial bearing, the first lubricant reservoir and the second lubricant reservoir; and parameters of the gaps (Pg when the lubricant reservoir has a substantially tubular shape, Pg when the lubricant reservoir has a substantially thin disc shape, Ps