Impeller for motor vehicle fan, including segmented hub stiffeners

A blower wheel for setting a flow of air in circulation comprises vanes that extend from a vane root attached to a hub of said blower wheel, said hub having a bottom wall through which a through-orifice for a drive shaft of said blower wheel passes, and a side wall, said hub also having at least one rib located between said orifice and said side wall, wherein said rib is formed by one or more segments, with said segment or said segments having at least one free edge extending from said bottom wall and facing toward said side wall, wherein another of said segments of said rib extends from said side wall, said other of said segments having at least one free edge extending from said bottom wall and facing toward said through orifice, and wherein said rib has at least two of said segments, known as end segments, and at least one additional said segment is located between said end segments in a non-contiguous manner with said end segments.