Device for demounting the second bead of a tire from a rim and respective demounting method

摘要

The present invention relates to a demounting device comprising a support member translatable along a movement axis (y-y), drive means for the support member, a tool-holder arm (3) borne by the support member (2), an abutment element (4) and a hook-like extraction member (5) both supported by the tool-holder arm (3), the abutment element (4) having a substantially flat work surface (4a), whereas the hook-like extraction member (5) is suitable for being moved in a substantially transverse direction with respect to the rotation axis (x-x) of a rim (W).

主权项

1. A demounting device applicable to a tire demounting machine for demounting the second bead of a tire from a rim rotatably mounted on the tire mounting demounting machine around a rotation axis, after the first bead of said tire has already been demounted from the first edge of the rim, said device comprising a support member translatable along a movement axis that is substantially parallel to said rotation axis, means for driving said support member, a tool-holder arm borne by said support member, an abutment element and an extraction member both supported by said tool-holder arm, said abutment element having a substantially flat work surface and being designed to externally abut at said work surface against said second bead and to move it via said means for driving close to a first edge of said rim, wherein said extraction member is movable in a substantially transverse direction with respect to said rotation axis of said rim adjacent to said work surface between a withdrawn rest position inside the bulk of said abutment element and an extended work position in order to be inserted between said abutment element and said second bead.