Patent ID: 8419282

Claim:
A fluid dynamic bearing device, comprising: a housing having a bottomed cylindrical shape comprising a cylindrical side part, a bottom part, and an open end, the cylindrical side part and the bottom part being provided as one integrally-formed part, the bottom part and the open end being provided at opposite sides in an axial direction of the bottomed cylindrical shape; and a bearing sleeve fixed to an inner periphery of the housing, the bearing sleeve having an inner peripheral surface which faces radial bearing gaps in which a fluid film of a lubricating fluid is formed so that a shaft to be supported is supported therewith in a radial direction, wherein the housing and the bearing sleeve have therebetween a press-fitting part at which the housing and the bearing sleeve are fixed by press-fitting, and an adhesive-filled part formed on a side of the open end of the housing with respect to the press-fitting part, the press-fitting part and the adhesive-filled part being superimposed on each other in the axial direction, and wherein an adhesive has been filled in the adhesive-filled part via the open end of the housing, part of the adhesive having further been drawn into the press-fitting part, the adhesive being hardened in the press-fitting part and the adhesive-filled part so as to provide a part bonded in a press-fitting manner, that is press-fitting and bonding the housing and the bearing sleeve, and a part bonded in a gap-filling manner, that is bonding the housing and the bearing sleeve with the adhesive filled in a gap between the housing and the bearing sleeve, wherein the housing further comprises a portion for housing a seal member inside of the inner periphery of the housing, the portion being provided on a side of the open end of the housing with respect to the bearing sleeve in the axial direction, wherein the bearing sleeve further comprises a chamfered outer peripheral edge on the side of the open end of the housing, and wherein the adhesive-filled part extends from the open end of the housing and passes the seal member and the chamfered outer peripheral edge of the bearing sleeve in the axial direction.