torque transmitting mechanism for compressor using an elastic ring to its assembly

The invention relates to a transmission mechanism comprising a pulley (1), a shaft (7) concentrically with said pulley (1), a hub (2) secured to said shaft (7), a holding element ( 4) opposite to said hub (2) to leave a radial gap therebetween in unedirection radial, an elastic member (3) placed fittingly in said radial space, and fixing means for fixing said holding member (4) said pulley (1) .Lesdits fixing means comprises: engaging means (6) for engaging said holding member (4) with said pulley (1) in a circumferential direction; and an elastic ring (5) which cooperates with said holding member (4) in a first axial direction and with said pulley (1) in a second axial direction to fix said holding member (4) to said pulley (1).