Patent ID: 8474803
Filing Date: 2013-07-02
Classification: F16F,Y10T

Abstract:
1. A damping device for damping flexural vibration of a shaft rotating about a first axis, the device comprising: a supporting body; and a first member, which defines an annular opening fitted through with said shaft, and is movable, with respect to said supporting body and radially with respect to said first axis, between a first and a second position when said shaft flexes radially with respect to said first axis; said first member being set to said first position, and said opening being traversed loosely by said shaft when the rotation speed of said shaft is within at least a first range; said first member being set, in use, to said second position, and the profile of said opening cooperating, in use, with said shaft, when the rotation speed of said shaft is within a second range differing from the first range and comprising at least one critical speed of the shaft; said device comprising: first elastic means interposed between said supporting body and said first member; and a pin movable integrally with said first member along a direction which is radial with respect to said first axis; said first elastic means being interposed between said pin and said supporting body; characterized by comprising a plate integral with and crosswise to said pin; said first elastic means comprising: at least one first spring interposed between a first portion of said supporting body and a projection of said first member; and at least one second spring interposed between said plate and a second portion of said supporting body.