Patent ID: 6179715
Filing Date: 2001-01-30
Classification: F16F

Abstract:
A torsional damper device of the kind including, between an input member (11) and an output member (12) rotatable relative to each other, three dampers (A, B, C,) which, in kinematic terms, come successively into action upon relative angular movement between said input member (11) and said output member (12), namely, in the opposite order to that in which they come into action, a main damper (A), an intermediate damper (B) and a pre-damper (C), each of said dampers (A, B, C) including two guide washers (20A-21A, 20B-21B, 20C-21C) on respective opposite axial sides of a web (22A, 22B, 22C) which are rotatable relative thereto, circumferentially acting spring members (23A, 23B, 23C) disposed circumferentially between the guide washers (20A-21A, 20B-21B, 20C-21C) and the web (22A, 22B, 22C), and friction means (25A, 25B, 25C) operative between the guide washers (20A-21A, 20B-21B, 20C-21C) and the web (22A, 22B, 22C) or parts constrained to rotate therewith, are acted on by axially acting spring means (26A, 26B, 26C), characterised in that the guide washer (20B) of the intermediate damper (B) at the greater axial distance from the web (22A) of the main damper (A) has axial tenons (33) constraining it to rotate with the web (22A) and the tenons (33) pass completely through the web (22A), are shaped to form elastically deformable hooks (35) beyond the web (22A) and are adapted to clip onto the web.