Patent ID: 8424584

Claim:
A unit for beading tires in tire changing machines or the like, comprising at least a bearing structure associable with a tire changing machine or the like, at least a supporting element associated with said bearing structure and moving with respect to the rim of a wheel mounted on said tire changing machine, a first actuator arrangement for moving said supporting element on said bearing structure, and at least a beading tool associated with a free extremity of said supporting element, further comprising a second actuator arrangement and a transformation arrangement for transforming the movement generated by said second actuator arrangement in the translation movement of said beading tool along a substantially curvilinear trajectory between a first extreme position, in which said beading tool is substantially retracted with respect to said rim, and a second extreme position, in which said beading tool is substantially closer with respect to said rim, wherein said bearing structure is associated with said transformation arrangement and can be turned with respect to said rim for the translation of said beading tool between said first extreme position and said second extreme position, wherein said transformation arrangement comprises at least a system of levers associated with said second actuator arrangement and associated with said bearing structure, and wherein said system of levers comprises at least a first connecting rod having a first extremity hinged to said bearing structure and a second extremity turnable around a first rotation axis which is fixed with respect to said rim.