| 摘要 |
PURPOSE: A bearing support structure of a rotary shaft of a motor is provided to ensure smooth rotation of a thrust bearing, prevent vibration and noise and reduce manufacturing cost. CONSTITUTION: A radial bearing(12) supports a load in a radial direction of a rotary shaft(16). A thrust bearing(14) is fixed on the rotary shaft to support a load in an axial direction of the rotary shaft and has the first friction surface. The radial bearing(12) is fixed on an inner surface of a bearing housing(11). The bearing housing(11) supports the thrust bearing, and has the second friction surface which is facing the first friction surface of the thrust bearing. At least one circular groove is formed so as for a lubricant to be injected into at least one of the first friction surface and the second friction surface. The first friction surface is formed on a lower surface of the thrust bearing. The lubricant is prevented from being exhausted for lubrication of the thrust bearing.
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