Patent ID: 10895284

Abstract:
A bearing unit includes: an impregnated bearing that rotatably supports a shaft of a rotor; a storage part which is formed in a manner that an end surface of a housing incorporating the rotor in an axial direction becomes convex toward an outer side and which stores the impregnated bearing in a non-rotatable manner; and an oil return washer which is placed to face an end surface of the impregnated bearing stored in the storage part and which integrally rotates with the shaft. The storage part has a bottom tubular shape, and includes an inner surface and a bottom surface, and the oil return washer is placed in a manner that the facing surface overlaps with the inner surface of the storage part when viewed from a radial direction, and includes a circulation part that receives oil leaked from the impregnated bearing and returns the oil to the impregnated bearing.