Device for damping vibrations in the drive train of a motor vehicle

TLDR: In this paper, an annular oscillatory mass, a supporting flange which can be fixed on the propeller shaft, and a spring body composed of an elastomer which provides the vibrational coupling of the oscillator mass to the supporting body of the flange.

Abstract: The invention indicates a device for damping vibrations in the drive train of a motor vehicle by means of a vibration absorber which, in coaxial arrangement with the propeller shaft of the motor vehicle, comprises an annular oscillatory mass, a supporting flange which can be fixed on the propeller shaft, and a spring body composed of an elastomer which provides the vibrational coupling of the oscillatory mass to the supporting body of the supporting flange. The supporting body of this supporting flange is of circular cylindrical design and the spring body is divided into elements in the form of ring segments which, as seen in the circumferential direction, are connected to one another by reinforcing elements which, as seen in the radial direction, are arranged between slots on the oscillatory-mass side and slots on the supporting-body side. The resonant frequency of the torsional vibration of the vibration absorber can be influenced in a specifically intended way by means of these reinforcing elements. Inserted into the ring segment-shaped spring elements of the spring body are reinforcing elements which are designed as circular cylindrical sheet-metal sleeves by means of which the resonant frequency of the radial vibration of the vibration absorber can be influenced in a specifically intended way to produce an increase.