Device for damping vibrations in a shaft

摘要

Means for damping oscillations comprises an annular element 24 which is non-positively connected by its central opening to a drive shaft 34 and has at least one chamber 28 filled with a fluid (e.g oil or glycerine) for absorbing vibration energy. The element 24 may comprise a plurality of chambers spaced circumferentially from one another or comprise an annular chamber. A damping element 30, optionally provided with depressions that increase contact with the fluid, may be present in each chamber 28. The element 30 is preferably integrated into a gear wheel 38 for use in the drive train of an electric hand machine tool such as an angle grinder.