Patent ID: 7862238
Filing Date: 2011-01-04
Classification: F16C

Abstract:
1. A hydrodynamic bearing rotary device, comprising: a sleeve having a tubular shape and an end surface, and extending in an axial direction; a rotary shaft having a first surface extending in a direction orthogonal to the axial direction of the sleeve, the rotary shaft being fitted to the sleeve and supported so as to be rotatable with respect to the sleeve; a thrust plate disposed at a position opposing the first surface; and a hub fitted to the rotary shaft at a position remote from the first surface and having a side along the axial direction and an additional member receiving surface configured to have an additional member to a motor loaded thereon, wherein, a first gap into which a lubricant is injected is formed between the first surface and the thrust plate, a second gap into which the lubricant is injected is formed between the hub and the end surface of the sleeve on the side of the hub along the axial direction, and a width of the second gap is greater than a width of the first gap when the first gap has a predetermined gap size and the second gap is at a minimum gap size.