| 摘要 |
750,180. Sockets. VERWALTUNGSGES. DER WERKZEUGMASCHINENFABRIK OERLIKON. Aug. 25, 1953 [Sept. 24, 1952], No. 23463/53. Class 83 (3). A hydraulically-operated device for ejecting a tool 18 from a socket in a tool-holder 2, e.g. in a lathe tailstock, comprises an ejector pin 14 having one end adjacent the tool and the other end abutting a piston 8 in a liquid-filled chamber F into which projects a piston 9 of smaller diameter than piston 8, whereby movement of piston 9 into the chamber causes movement of piston 8, to eject the tool with increased force. The holder 2 containing the device is attached to a piston 4 movable throughout a stroke, limited by ports A, B, by hydraulic pressure controlled by valves 16, 17, and piston 9 has a bore 10 which ensures chamber F being always filled. When the tool is to be ejected, valve 16 is actuated to connect ports B, C to exhaust and permit piston 4 to travel beyond ports B, whereby piston 9 abuts stop 11 and bore 10 is closed by projection 12, and continued movement of piston 4 causes piston 9 to move into chamber F. |
