Hydrodynamic bearing device and inspection method of amount of working fluid
A fluid bearing and working fluid technology, applied in bearings, electromechanical devices, bearing components, etc., can solve the problems of reduced bearing rigidity, unstable rotation, and reduced delivery volume, and achieve the effect of preventing fluid bearing devices and improving reliability
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[0040] Hereinafter, a fluid bearing device and a method for inspecting the amount of working fluid thereof according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a case where the fluid bearing device is used in a spindle motor of a hard disk drive will be described.
[0041] Implementation form 1:
[0042] 1 is a cross-sectional view of a spindle motor having a fluid bearing device according to an embodiment of the present invention, Figure 2A is a sectional view of the fluid bearing device, image 3 is a top view of the fluid bearing device, Figure 2A Yes image 3 The II-II line sectional view. In the following description, for ease of understanding, as shown in Fig. 1 and Fig. 2, the case where the open end of the bearing hole of the bushing is disposed above and the closed end is disposed below will be described, but of course it is not limited to this in actual use. configuration.
[0043] Figure 1~...
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