| 主权项 |
1. A cylinder driving apparatus for driving a cylinder, comprising:
a cylinder having a first chamber and a second chamber that are partitioned by a piston provided on a piston rod; a pump including a first port and a second port, the pump being configured to be capable of discharging a working fluid from either port; a tank configured to store the working fluid; a first passage connecting the first chamber to the first port; a second passage connecting the second chamber to the tank; a third passage connecting the second port to the tank; a throttle configured to apply resistance to the working fluid flowing through the third passage; and an operated check valve provided in the first passage to allow the working fluid to flow from the pump into the first chamber, the operated check valve being configured to allow the working fluid to flow from the first chamber into the pump in accordance with a fluid pressure of the working fluid in the third passage between the pump and the throttle, wherein the cylinder is configured such that when the pump discharges the working fluid from the first port, the discharged working fluid is supplied to the first chamber via the operated check valve, thereby causing the piston rod to move in an expansion direction, and when the pump discharges the working fluid from the second port, the working fluid in the first chamber is discharged from the first chamber via the operated check valve, thereby causing the piston rod to move in a contraction direction. |
