Simplified automatic tyre demounting device, and tyre removal machines equipped therewith

摘要

Automatic device for demounting a tyre (6) from the relative wheel rim (5), comprising, for supporting the wheel rim (5) complete with tyre (6), rotary means (4) associated with a frame (7) which supports a demounting tool (15) and is associated with means enabling it to be positioned in a tyre bead seeking and gripping position in which it is perpendicular to the axis or orientated towards the centre of the wheel rim, and in a position for extracting said tyre bead from the wheel rim in which it is perpendicular to the axis or orientated in the opposite direction, said tool positioning means comprising a bar (14), to the end of which said tool (15) is hinged in an intermediate position, and a connecting rod (19,20,25) which at one end is hinged to one end of said tool, and at the opposite end is connected to said bar by a lever linkage (21), said bar being connected to means (200) for advancing it and withdrawing it.