公开(公告)号：US3695144A

公开(公告)日：1972-10-03

申请号：US3695144D

申请日：1970-08-05

Applicant: CHARMILLES SA ATELIERS

Inventor： GOIFFON THIERRY ,  LEHMANN HANS RUDOLF ,  SCHAIDL HUBERT

IPC: B23H7/30 ,  B23Q1/28 ,  B23Q1/30 ,  B30B15/28 ,  F15B15/26 ,  B23D1/08

CPC classification number: B23Q1/30 ,  B23H7/30 ,  B23Q1/28 ,  F15B15/262

Abstract: A locking mechanism for a hydraulically actuated movable rod member of a machine tool, such as the electrode tool holder of an electro-erosion machining apparatus, consisting of a locking member preferably in the form of an annular expansible member surrounding a linearly and/or angularly displaceable rod member and normally biased in engagement with the surface of the rod member. The annular member is supported by a stationary element of the machine and normally engages the rod member so as to immobilize it in a predetermined position as long as the machine servo mechanism is activated. When the machine servo mechanism is activated, pressurized fluid is introduced in a chamber dependent from the annular member, causing an expansion of the annular member releasing the rod member for normal actuation thereof by the servo mechanism.