| 摘要 |
A hydraulic system, wherein an actuating cylinder and an accelerating cylinder each includes a piston, a rod, and a tube. When the rod of the actuating cylinder extends in an unloaded condition, a circuit is configured such that oil discharged from the bottom-side section of the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder through a bottom line. When the rod of the actuating cylinder extends in a loaded condition, a circuit is configured such that oil supplied to the bottom line without passing through the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder. The circuit for the unloaded condition and the circuit for the loaded condition is switched based on a pressure sensing in the bottom line. |
| 主权项 |
1. A hydraulic system comprising:
an actuating cylinder and an accelerating cylinder, the actuating cylinder and the accelerating cylinder each including,
a piston,a rod moving integrally with the piston, anda tube containing the piston and the rod, the tube being divided into a rod-side section on the rod side and a bottom-side section on the opposite side to the rod with the piston interposed therebetween; a switch valve switching a circuit for unloaded condition and a circuit for loaded condition; a supply/discharge line being a source of oil supply; and a bottom line allowing connection between the bottom-side section of the accelerating cylinder and the bottom-side section of the actuating cylinder, wherein when the rod of the actuating cylinder is extended in unloaded condition, a circuit is configured such that oil is supplied from the supply/discharge line to the rod-side section of the accelerating cylinder and oil discharged from the bottom-side section of the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder through the bottom line, when the rod of actuating cylinder is extended in loaded condition, a circuit is configured such that oil from the supply/discharge line is supplied to the bottom-side section of the actuating cylinder without passing through the accelerating cylinder, and the switch valve switches the circuit for unloaded condition to the circuit for loaded condition based on a pressure in the bottom line. |
