| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing unit of a supercharger capable of effectively preventing intrusion of rain water or dust from the outside, effectively discharging any intruding rain water or dust, and preventing rusting of a bearing part. SOLUTION: In this bearing unit of a supercharger, a rotor shaft 2 is journalled to a bearing 7 mounted to an end surface of a housing 1A, and a pulley 6 is fixed to the outer end of the rotor shaft 2. At least stacking parts 6A and 13 in axial direction are formed between the pulley 6 and the housing 1A. Even in a simple structure without arranging a special member, existing of a labyrinth-like space prevents the intrusion of rain water or dust from the outside to suppress rusting of the bearing part 7.
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