| 摘要 |
A hydraulically-operated press-driven tool actuation system includes a press-driven hydraulic power device (100) and/or a hydraulically-powered tool actuator. In the tool actuator, at least two pistons are carried by a housing, and at least one return device is carried by the housing laterally inboard of the pistons. In the power device, a pump (102) includes a piston disposed in a pump cylinder for pressurizing hydraulic fluid therein. An accumulator (104) is in fluid communication with the pump cylinder, and includes a piston disposed in an accumulator cylinder that houses hydraulic fluid on one side of the piston. A body (106) supports the pump (102) and accumulator (104) thereon and is in fluid communication between the pump and accumulator cylinders. The body (106) includes a pressure relief valve downstream of the pump cylinder and upstream of the accumulator cylinder, and a check valve downstream of the accumulator cylinder and upstream of the pump cylinder. |
