| 摘要 |
PURPOSE:To prevent operation errors of a detector with its detecting part prevented from being immersed in infiltrated operating fluid by providing a leak oil port formed in a case bottom surface of the detector and a leak oil reservoir connected to this leak oil port. CONSTITUTION:A detector 10, connected to a shaft end 3a of an electric motor, is formed in an oil-tight type by applying an oil seal 11 to a rotary part 10 with an O ring 12 interposed between a case 10b and a bearing part 10c, and an oil passage 14 is formed in the bearing part 10c. While a leak oil port 15 is provided in a bottom part of the case 10b and connected to a leak oil reservoir 16 by a connection pipe 15a. By this constitution, since operating fluid, infiltrated from the bottom surface of the case 10b, is discharged so as to prevent a detection part 13 from being immersed in the operating fluid even when its amount, infiltrated into the detector 10, is increased, misoperation of the detector 10 is prevented. While by forming the leak oil reservoir 16 in larger volume than the detector 10, it can cope with even an increase of operating fluid in its infiltrating amount. |
