A fixing device for a lifting element (4) for lifting rolling axles of industrial vehicles, trailers, said lifting element (4) suitable for acting on a leaf spring arm (3) associated with the rolling axle to be elevated , said leaf spring arm (3) mounted bascularmente on a support (1) of the pneumatic suspension with the collaboration of a transversal pin (2), said locking device comprising a support (5) for the lifting element (4) incorporates two lateral arms vertical (6), finished at their free ends with respective arcs hook (7), the hooks (7) of the type "hook", allowing coupling of said hooks to projecting parts of the support ( 1) of the pneumatic suspension so that the lifting element can be coupled to the support (1) of the pneumatic suspension simply hanging it on said projecting parts characterized in that the pair tes outstanding consist of the ends of the transverse pin (2) protruding from the support (1) of the pneumatic suspension.
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