Patent ID: 7419464

Claim:
A rotor mounting structure for a centrifugal separator, comprising at the distal end of a drive shaft, a cylindrical shaft, in which a plurality of elastic tongue pieces provided substantially equidistantly on the peripheral edge of the upper surface of the cylindrical shaft extend upward from the upper surface and have hooks formed so as to protrude radially outwardly at the upper ends thereof, wherein a shaft accommodation orifice which is open downward and accommodates the cylindrical shaft is formed in the center of the rotor, elastic tongue piece insertion grooves for inserting the elastic tongue pieces therethrough are provided through the upper wall of the shaft accommodation orifice, the elastic tongue piece insertion grooves of the rotor are mated with the elastic tongue pieces of the cylindrical shaft, the rotor is joined to the cylindrical shaft, while bending the elastic tongue pieces, and in a state in which the rotor is completely joined to the cylindrical shaft, the rotor is locked to the cylindrical shaft by engaging the hooks of the elastic tongue pieces with the upper edges of the grooves of the rotor by the elastic force of the elastic tongue pieces.