Patent ID: 6384508
Filing Date: 2002-05-07
Classification: F04D,F16D,H02K,Y10T

Abstract:
A device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part, comprising at least two motion transmission couplings which mutually cooperate in a kinematic series, each coupling being constituted by at least one driving element which is eccentric with respect to the rotation axis and is rigidly coupled to a component of the motion transmission system and by at least one driven element, which is also eccentric with respect to the rotation axis and is rigidly coupled to the component arranged kinematically after the preceding one, the angle covered by the elements of each coupling being, as a whole, less than a round angle, the intermediate components of the kinematic transmission having both a driven element and a driving element for receiving the motion from a preceding one and transmitting it to a subsequent one, wherein said motion transmission couplings are toothed, a first one of said couplings being constituted by two first teeth which are rigidly coupled to the rotor of a motor in diametrically opposite positions, and of two second teeth which are rigidly coupled, likewise in diametrically opposite positions, to an annular element which can rotate freely with respect to said rotor, a second one of said couplings being composed of said second teeth and of two thirds teeth which are also diametrically opposite and are rigidly coupled to the working part.