Patent ID: 7160030
Filing Date: 2007-01-09
Classification: F16C,G02B,H02K

Abstract:
1. A hydrodynamic bearing rotatably supporting a shaft by hydrodynamic pressure, the hydrodynamic bearing comprising: a bearing housing having a hollow portion rotatably engaged with the shaft and filled with oil, and first and second stepped mounting recesses formed at one end of the hollow portion; a thrust plate installed in the first mounting recess so that one surface of the thrust plate is in contact with one end of the shaft, for supporting the shaft in a thrust direction, a diameter of the thrust plate being smaller than that of the first mounting recess; a first air discharging path formed at the thrust plate, the first mounting recess, or the thrust plate and the first mounting recess, for discharging air out of the bearing housing; a cap installed at the second mounting recess, for supporting a lower portion of the thrust plate; and a second air discharging path formed at the cap for communicating with the first air discharging path through a space between the thrust plate and the first mounting recess to discharge outwardly the air transferred from the first air discharging path.