| 摘要 |
<p>A sealing device is to be fitted at a side of a bearing unit in order to seal a gap ( 15 ) between a stationary race ( 11 ) and a rotatable race ( 10 ) of the bearing unit. The device includes a relatively rigid reinforcing insert ( 16 ) of disc-annular shape, and a gasket ( 17 ) of relatively soft rubber or elastomeric material, over-moulded or vulcanized onto the insert ( 16 ). The gasket forms two opposite peripheral sealing portions ( 18, 19 ) intended to perform a static sealing action against the rotatable race ( 10 ) and a dynamic sealing action on the stationary race ( 11 ), respectively. The insert ( 16 ) includes magnetized or magnetizable material for forming, at predetermined angular zones or fields, a sequence of alternate and/or spaced north/south poles, in order to act as an encoder.</p> |
