| 摘要 |
PURPOSE:To eliminate the seizure of the bearing for a resin-molded motor by forming a groove on the surface making contact with an oil cover with a projection for press-fitting the coil cover formed at the bearing retainer, thereby preventing the oil in the bearing from leaking from the gap between the projection and the coil cover. CONSTITUTION:When a stator iron core 2 and a winding 3 are molded, a bearing retainer 4 is formed integrally therewith with molding resin 1. A projection 8 for press-fitting an oil cover 7 is integrally formed with the retainer 4, a groove 11 having a suitable depth is formed on the contacting surface with the coil cover 7, and an oil felt 6 is disposed between the retainer 4 and the oil cover 7 on the outer periphery of an automatic spherical centering bearing 5. Even if the oil tends to leak from the gap between the projection 8 and the cover 7 due to capillary phenomenon, the oil is prevented from being leaked due to the static pressure of the oil in the groove 11 in this manner, and the oil can be prevented from being leaked. |
