WORKING MECHANISM OF RECIPROCATING WORKING MECHANISM IN ELECTRO-HYDRAULIC WORKING TOOL

摘要

PURPOSE: To provide an electro-hydraulic working tool capable of surely and stably attaching and detaching an opening/closing valve to and from a valve seat. ;CONSTITUTION: A guide member 26 having a hole is attached to the inside of the rear opening 24 of the hollow part 25 of an oil piston 23 and the valve stem part 5a of an opening/closing valve 5 is inserted into this guide member 26. At least two kinds of strong and weak springs S₁ and S₂ are serially provided between the valve stem part 5a and the guide member 26 and a member 28 for preventing pulling out of the springs S₁ and S₂ is provided on the front end of the valve stem part 5a.;COPYRIGHT: (C)1995,JPO