MEASURER FOR BACK PRESSURE OF ELECTROMOTIVE INTRUDER

摘要

PURPOSE: A measurer for back pressure of an electromotive intruder is provided to readily miniaturize an intruder by measuring the back pressure given to a screw axle from a screw through plural deformation gauges and to conveniently maintain and repair the measurer due to the small possibility of damages to the screw axle or shaft. CONSTITUTION: An outer diameter of a shaft(4) transfers a back pressure from a screw(3) to a screw axle(7) through a thrust box(5) upon intrusion-molding. An outer diameter of the screw axle(7) connects to a nut(8) and establishes the intrusion pressure and capacity of the synthesized resin. The outer diameter of the screw axle receives a regular back pressure from the screw upon intrusion-molding. Plural deformation gauges(9) are formed at a certain interval on the outer diameters. When deformation or pressure is given to the outer diameters from the outside and a resistance value is changed, the deformation gauge measures displacement.