| 摘要 |
PURPOSE:To reduce a space in an axial direction as well as to improve lubrication and sealing performances by giving a single annular member both functions of a sensor rotor and a seal member, and thereby integrating the annular member and a bearing into one body. CONSTITUTION:A first annular member 42 is formed with a cylinder member 65 of magnetic body, a flange member 66, and a first seal member 50 having a rubber contact piece 48, while a second annular member 46 with a metal core 52 comprising a cylindrical member 62 and a flange member 68, and a second seal member 58 having contact pieces 54, 56 thereto. Rectangular bores 72 are arranged spacedly in a circumferential direction, while being extended in a radial direction, and filled with a rubber material which forms a seal 58. It is thus possible to give a single annular member both functions of a sensor rotor and a seal member, reduce space in an axial direction, and improve the lubrication and sealing functions.
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