Wheel rim locking device for tyre removal machines

A wheel rim locking device for tyre removal machines, comprising, for supporting the wheel rim (2), an upper plate (6) provided with an axial hole and supported at the top of a hollow vertical rotary shaft (3), conical means (137) to be inserted axially into said hole and into the cavity of said shaft to lock the wheel rim in a centered position, means driving said conical means towards the wheel rim and axially locking them, and means for rotatably locking said hollow shaft relative to said wheel rim.