| 摘要 |
A sealing device has an encoder incorporated therein, and includes a combination of seal elements ( 3, 2 ), each of which includes an annular metal core ( 31, 21 ) having a substantially L-shaped cross section having a cylindrical portion ( 31 a , 21 a) and a flange portion ( 31 b , 21 b) provided on one end of the cylindrical portion ( 31 a , 21 a) and extending in the direction perpendicular to the direction in which the cylindrical portion ( 31 a , 21 a) extends. A first seal element ( 3 ) of the two seal elements ( 3, 2 ) and the second seal element ( 2 ) are combined together such that the space defined by the cylindrical portion ( 31 a) and flange portion ( 31 b) of the first seal element ( 3 ) and the space defined by the cylindrical portion ( 21 a) and flange portion ( 31 b) of the second seal element ( 2 ) face each other. The first seal element ( 3 ) further includes an elastic seal portion ( 6 ) provided on the flange portion ( 31 b) and disposed in the space defined by the cylindrical portion ( 31 a) and flange portion ( 31 b), and the second seal element ( 2 ) further includes a magnet-based encoder ( 1 ) provided on the flange portion ( 21 b). A coating layer ( 8, 7 ) is provided on the side ( 31 c) of the first seal element ( 3 ) opposite the side on which the first seal element ( 3 ) is combined with (faces) the second seal element ( 2 ), or on the side ( 1 a) of the second seal element ( 2 ) opposite the side on which the second seal element ( 2 ) is combined with (faces) the first seal element ( 3 ), or on both of the sides ( 31 c) and ( 1 a).
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