Hub wheel for tandem axles

A wheel hub for tandem axles, comprising:

• a housing within which a reduction system is accommodated and formed by conical sun gears and conical planetary gears accommodated in a supporting structure wherein:
• the sun gears are mounted in a yoke that is attached to said supporting structure;
• the conical planetary gears are attached, respectively, to a differential housing in a fixed way and to an end of a semi-draft having free rotation;
• and
• a connection sleeve is mounted in the end of the semi-draft having concentric mobility in relation to said conical planetary gear through an actuator system placed in an end of the supporting structure, wherein said connection sleeve is formed by a body having a surface with double connection toothing disclosing a configuration corresponding to toothing of the yoke, and the toothing having a configuration corresponding to toothing of said conical planetary gear, the actuator system being a two stage pneumatic rotational valve, wherein the first stage is formed by a central chamber within which there is a piston which is engaged with said connection sleeve, and the second stage is constituted by a peripheral chamber having a ring piston having an opening that interacts with a flange of the structural body of said connection sleeve.