| 摘要 |
PURPOSE:To simplify the structure of the titled apparatus, by connecting a main shaft and an impeller hub of a pump by the intermediary of a hydraulic cylinder, forming pistons slid in the hydraulic cylinder integrally with a control rod communicated with an oil chamber via a conduit, and thereby reducing the length of said control rod. CONSTITUTION:Pistons 43a, 43b, disposed in a freely slidable manner in respective chambers 40a, 40b of a multi-cylinder 40 provided between a main shaft 14 and an impeller hub 7 of a pump, are formed at the upper end portion of a control rod 41 in a unitary manner. The upper end of a conduit 42 extended through the inside of the control rod 41 is opened in the cylinder chamber 40a while the lower end of the conduit 42 is located in an impeller cap 17 and opened in an oil chamber 45a communicated with a pressure oil supplying and discharging pipe 6a. Through employment of such an arrangement, it is enabled to reduce the length of the control rod 41, to simplify the structure of a movable blade controlling apparatus and to facilitate assembling and disassembling operation of the same. |
