Spindle construction for mounting arrangements for spinning machine rotors

Claim 1

A spindle, particularly for a mounting arrangement of spinning rotor within the spinning housing of a spinning machine, said spindle comprising an outer sleeve with races for two ball rows arranged in cages, a shaft provided with races and having an external end portion adapted to be driven by driving means and an internal end portion adapted for the mounting arrangement of the spinning rotor as well as a seal for sealing the annular gap, a plurality of balls arranged between the outer sleeve and the shaft, the shaft comprising a dynamically elastic portion and a supporting sleeve including an internal recess, said spindle further comprising an intermediate sleeve for fixing the outer sleeve and including an internal wall having a cylindrical orifice therein, a plurality of resilient damping elements with an outer supporting sleeve adapted for mounting within the spinning housing, a labyrinth seal disposed in the space between the spinning rotor and the front side of the outer sleeve, said labyrinth seal including a labyrinth knife separating the rotor space within the spinning housing from a compensation space between the labyrinth seal and the front side of the outer sleeve, interconnected through an air-aspiration orifice with a space external of the spinning housing, said shaft, including said dynamically elastic portion and said supporting sleeve including said internal recess, also comprising a fastening surface defining a cylindrical bore, and at least one said race for an inner row of said balls, said supporting sleeve constituting at least a part of a dynamically rigid portion of the shaft, the dynamically elastic portion of the shaft being limited by the length thereof between the beginning of the hub of the spinning rotor and a transition area between the internal recess of the supporting sleeve and fastening surface at which the dynamically rigid portion begins, and said transition area is provided in the first half of the length of the outer sleeve laterally adjacent to said inner ball row.