Patent ID: 6689002
Filing Date: 2004-02-10
Classification: F16H

Abstract:
Device for tensioning and immobilization in an eccentric-forming roller for tensioning a transmission of rotational moments, the device enabling adjustment and fixing of a hub of the tension roller in a determined angular position, on a bearing surface, by means of a clamping screw passing through the hub,the device comprising: an intermediate part freely placed in a first housing provided in the hub, a fixed pivot pin integral with the bearing surface and consisting of a cylindrical portion constituting a rotational guide of the hub, said cylindrical portion having a defined height, between two faces, one of which rests on the bearing surface and the other is formed by the underface of a cylindrical head which extends radially beyond the cylindrical portion and which protrudes freely in a second housing provided in the base of the hub, the intermediate part being supported at one end having a projection by a bottom of the first housing and at another end by the head of the fixed pivot pin, the clamping screw passing through the hub and acting on the intermediate part, the intermediate part enabling creation of a lateral offset between an axis of the clamping screw and an axis of the fixed pivot pin, so that a distance between the axis of the clamping screw and the axis of the fixed pivot pin obtained by the lateral offset enables (i) making the hub travel a circular path which constitutes a tensioning stroke of the device by rotation of the hub around the fixed pivot pin when the clamping screw has not yet been tightened, and (ii) immobilizing the hub against the bearing surface by pressure and adhesion in the angular position determined by tightening of the clamping screw in the intermediate part which acts as a clamping means.