Patent ID: 6921208

Claim:
A dynamic bearing device, comprising: a housing; a bearing sleeve fixed to an inner circumference of the housing; an axis member having an axis portion and a flange portion; a thrust member fixed to an one end portion of the inner circumference of the housing; a radial bearing portion, arranged between an inner circumferential surface of the bearing sleeve and an outer circumferential surface of the axis portion, for supporting the axis portion in a non-contact manner in the radial direction under a dynamic action of lubrication oil generated in a radial bearing gap; a first thrust bearing portion, arranged between one end face of the bearing sleeve and one end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, wherein the one end of the inner circumference of the housing is a straight shape in an axial direction so as to be able to adjust a position of the thrust member with respect to the housing, and a second thrust bearing portion, arranged between an end face of the thrust member and the other end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, wherein the position of the thrust member with respect to the housing is set, with using the one end face of the bearing sleeve positioned at a predetermined position on the housing as a reference, and thereby, the thrust bearing gaps of the first thrust bearing portion and the second thrust bearing portion are formed with a predetermined dimension.