| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid pressure circuit capable of: solving a problem of lowering of a speed of a fluid pressure cylinder in increase of an accumulator pressure without switching a circuit which causes degradation of operability; and efficiently reusing energy.SOLUTION: A fluid pressure circuit includes: main pumps 12, 13 driven by an engine 11; a boom cylinder 7c1 having a piston 7cp operated by hydraulic oil supplied from the main pumps 12, 13, and chambers 7ch, 7cr defined by the piston 7cp; an accumulator 61 accumulating the hydraulic oil pressed out from one chamber 7ch of the boom cylinder 7c1; and an assist pump motor 15 sucking the hydraulic oil from the accumulator 61 when pressure accumulation in the accumulator 61 advances and an accumulator pressure rises. |
