| 摘要 |
<p>Provided is a bearing sealing device which contributes to reduce rotational torque and which can appropriately prevent muddy water from entering the bearing sealing device and also can appropriately discharge muddy water having entered the bearing sealing device. A bearing sealing device (10) is mounted to one axial end of an annular bearing space (S) in a bearing device (1) in which a rotational-side member (5) is supported relative to a stationary-side member (2) so that the rotational-side member (5) can rotate coaxially with the stationary-side member (2). The bearing sealing device (10) includes: a first member (100) provided with a slinger (11) integrally mounted to the rotational-side member, the first member (100) being also provided with an elastic member (18) secured to a radial end of the slinger (11), the first member (100) constituting a part of the rotational-side member; and a second member (200) provided with core metal (14) integrally mounted to the stationary-side member (2), the second member (200) being also provided with seal lips (17a (17b, 17c)) consisting of an elastic substance, the seal lips (17a (17b, 17c)) being secured to the core metal (14) and being in elastic contact with the slinger (11). The bearing sealing device is characterized in that the elastic member (18) and a seal lip member (17) form a labyrinth structure (r1) at a portion located on the side opposite the bearing space (S). The facing surfaces (18a, 170d) of the elastic member (18) and the seal lip member (17), which form the labyrinth structure (r1), have tapered surfaces parallel to each other and having diameters increasing toward the side opposite the bearing space (S). The tapered surface of the elastic member (18) is provided with a muddy water discharge means (19).</p> |
