| 摘要 |
PROBLEM TO BE SOLVED: To provide a quantitative pressure accumulating device capable of injecting a constant amount of gas or oil to a pressure accumulator with a simple structure hardly broken.SOLUTION: A hollow vessel has a hole to which a part of a piston rod projects from an inside of the hollow vessel on a second side wall, an elastic member presses the piston rod to the second side wall from the inside of the hollow vessel, and oil is supplied from a hydraulic pump to a first passage, and thereby, a pressure difference generating piston moves in a hollow cylinder from a first cover side to a second cover side. When an end of the piston rod is brought into contact with the second cover, the piston rod compresses the elastic member to the first side wall of the hollow vessel, and the hollow vessel is moved to the second cover side in the hollow cylinder, and thus, a pressure in the hollow cylinder between the first cover and the pressure difference generating piston becomes larger than a pressure in the hollow cylinder between the second cover and the pressure difference generating piston, and the hydraulic pump is stopped by detecting the pressure difference with a pressure switch.SELECTED DRAWING: Figure 1 |
