| 摘要 |
<p>A bearing unit comprises an outer stationary race ( 1 ) with a first inner passage ( 6 ) for the air, and two axially adjacent inner half-races ( 2 a , 2 b) rotatable with the hub of a wheel. Formed between the inner half-races are essentially radial second inner air passages ( 7, 71, 72 ). These passages have surfaces ( 71 d , 72 d) inclined forwardly with respect to a direction of rotation (A, B) so as to favor the air flow through the rotating part of the bearing.</p> |
