Patent ID: 6842968

Claim:
A device for mounting a rotor of a hermetic compressor of the type comprising: a crankshaft having an end flange provided with an annular surface and an extension; a bearing hub, radially journalling the crankshaft and having an end annular face defining an axial bearing with the annular surface; and a rotor of an electric motor to be affixed, by mechanical interference, around the extension of the crankshaft comprising: a pulling rod, which is loosely and coaxially provided through the rotor, in order to have a first end coaxially and releasable coupled to an end of the crankshaft, which is fitted inside the rotor, and a second opposite end, to be seated against an opposite end face of the rotor; a driving means, engaged to the second end of the pulling rod so as to move the latter to cause an axial displacement of the crankshaft, sufficient to fit, by mechanical interference, its extension inside the rotor; an axial gap defining means which is displaced between an inoperative position and an operative position, in which it is positioned between the annular surface of the end flange of the crankshaft and the end annular face of the bearing hub, in order to interrupt the axial mounting displacement of the crankshaft in the rotor, when the axial gap between the annular surface and the end annular face reaches a determined value; and an extracting means (EM), which is operatively coupled to the axial gap defining means so as to displace the latter between its inoperative and operative positions.