Fluid bearing device and its manufacturing method

Abstract

To provide a fluid bearing device in which a bearing sleeve can be easily assembled to a housing and which has excellent moment rigidity. [MEANS FOR SOLVING THE PROBLEMS] This fluid bearing device (1) comprises radial bearing parts (R1, R2) and thrust bearing parts (T1, T2). Thrust bearing surfaces (C, D) are provided on the first and second step surfaces (2d, 2e) of the housing (2) respectively. The thrust bearing parts (T1, T2) are formed between the thrust bearing surfaces (C, D) and the end surfaces (6b, 7b) of seal members (6, 7) projecting to the outer diameter side of a shaft member (5).

Description

technical field [0001] The present invention relates to a fluid bearing device and a method of manufacturing the same. Background technique [0002] A fluid bearing device supports a shaft member on a rotating member using a lubricating film of fluid generated in a bearing gap. This fluid bearing device has the characteristics of high-speed rotation, high rotation accuracy, and low noise. In recent years, it has been used as a bearing device for electric motors that firstly mount information equipment on various electrical appliances, and more specifically, as a magnetic disk such as HDD. Devices, CD-ROM, CD-R / RW, DVD-ROM / RAM and other optical disc devices, MD, MO and other optical disk devices, such as spindle motors, laser printers (LBP) polygon scanner motors, projector color film motors, Bearing devices for electric motors such as fan motors are preferably used. [0003] For example, as a fluid bearing device equipped with a spindle motor for a disk drive, Figure 14 T...

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