| 摘要 |
PURPOSE:To enable obtaining even imtensity of output signal even if the displacement along the axial direction occurs and to ficilitate the exchange of the bearing by a method wherein the protruding part of the pickup device is situated far from the rotary shaft along the axial direction and is opposed by pickup oil. CONSTITUTION:The pickup board 4 which has the pickup blad 6a that protrudes along the axial direction off the shaft 1 is provided at the end surface of the rotating shaft 1 and at this opposed position the pickup coil 7 is provided by the attachment 8. By this construction the even output is obtained in spite of displacement of the rotating shaft 1 along the axial direction because the gas between the pickup blade 6a and pickup coil 7 does not change. EXchange of the bearing 3 etc. is facilitated due to the capability of smaller diameter of the pickup board 4 than that of rotating shaft. |
