Patent ID: 6217218
Filing Date: 2001-04-17
Classification: F16C,G11B,H02K

Abstract:
A hydrodynamic bearing spindle motor comprising:a fixed member which has a radial bearing portion;a rotational member;a rotary shaft which is rotatably supported by the radial bearing portion of the fixed member and is secured to a substantially central location of the rotational member so as to extend in a vertical direction of the hydrodynamic bearing spindle motor such that the rotational member is disposed above the fixed member;lubricant which is provided between the radial bearing portion of the fixed member and the rotary shaft;a projection which is provided on a lower face of the rotational member so as to be disposed radially outwardly of the rotary shaft and has an oblique inner periphery expanding gradually radially outwardly towards a distal end of the projection;a lubricant receiving means which is secured to an upper face of the fixed member so as to be disposed radially outwardly of the projection; andoil repellent for repelling the lubricant, which is applied to the projection and its vicinity;wherein the lubricant receiving means is provided at a location to which the lubricant repelled by the oil repellent and scattered from the projection through rotation of the rotational member adheres.