| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit for a tilting device of a ship propulsion machine capable of suppressing descending of a piston caused by the biting of foreign matter in a valve. SOLUTION: Two hydraulic passages 15, 16 are connected to a hydraulic pump 14 capable of switching the oil feeding direction, a tilt cylinder 8 is connected to the hydraulic passages 15, 16, and a piston 8a of the tilt cylinder 8 is reciprocated by the working fluid to be fed from the hydraulic pump 14. Two check valves 30, 31 to simultaneously open the hydraulic passages 15, 16 when the hydraulic pump 14 is driven are respectively arranged. When the hydraulic pump 14 is not driven, the check valves 30, 31 closes the hydraulic passages 15, 16 to keep the position of the piston 8a of the tilt cylinder 8. A filter F is fitted in the vicinity of the check valves 30, 31 in the hydraulic passages 15, 16 and at the position farther from the check valves 30, 31 with reference to the hydraulic pump 14. |
