| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid pressure circuit capable of ensuring a necessary pump flow rate even when working fluid is accumulated in an accumulator with a simple structure, and to provide a work machine.SOLUTION: A fluid pressure circuit includes: an accumulation circuit A in which pressure oil from the head side of a cylinder 7c1 is accumulated in an accumulator 46 through a control valve 61 capable of changing a communication amount between the head side of the cylinder 7c1 and the accumulator 46 according to an operation amount of a lever; a regeneration circuit B in which pressure oil from the head side of a cylinder 7c2 is regenerated to the boom cylinders 7c1, 7c2 through a main control valve 62 capable of disconnecting communication between the head sides of cylinders 7c1, 7c2 and communicating between the head side of the cylinder 7c2 and the respective rod sides of the cylinders 7c1, 7c2 in a case where the pressure oil is accumulated in the accumulator 46; and an auxiliary regeneration circuit C in which part of working fluid accumulated in the accumulator 46 is regenerated on the rod side of the cylinder 7c1 through a regeneration control valve 63 capable of changing a communication amount between the control valve 61 and the rod side of the cylinder 7c1 according to the operation amount of the lever.SELECTED DRAWING: Figure 1 |
