Reifenabdrückvorrichtung für ein Raddemontiergerät

摘要

A bead release device for tyre removal machines comprises an arm (60) which at one end is intended to be hinged on a vertical axis (6) to the base (1) of a tyre removal machine (100), while at its other end it supports a positionable bead release tool (66), said arm being coupled with unilateral engagement to the rod (9) of a pneumatic cylinder-piston unit which is associated with said base, said unilateral engagement being achieved by a plurality of aligned equidistant identical notches (111) provided in the end longitudinal portion of said rod and by a coupling member (18) which is provided on said arm (60) and is arranged to occupy a rest position in which it allows said arm (60) and rod (9) to slide freely relative to each other, and a working position in which it maintains these latter coupled together.