| 摘要 |
A hydraulic device (1) wherein an operating cylinder (2) and an acceleration cylinder (3) are equipped with pistons (5, 12), rods (6, 13), and tubes (4, 11), with the tubes (4, 11) partitioned into rod-side compartments (8, 15) and bottom-side compartments (7, 14) by means of the pistons (5, 12). When there is no load and the rod (6) of the operating cylinder (2) extends, a circuit is created wherein the oil in the bottom-side compartment (14) of the acceleration cylinder (3) is supplied to the bottom-side compartment (7) of the operating cylinder (2) through a bottom line (27), and when there is a load and the rod (6) of the operating cylinder (2) extends, a circuit is created wherein the oil supplied to the bottom line (27) without passing through the acceleration cylinder (3) is supplied to the bottom-side compartment (7) of the operating cylinder (2). Switching from the no-load circuit to the load circuit is performed on the basis of the detection of the pressure in the bottom line (27). |
