Running gear unit with a linking arrangement for reduced torsional vibration

The present invention relates to a running gear unit, in particular for a rail vehicle, comprising a wheel unit (105) and a first torsional vibration reduction mass unit (108). The wheel unit (105; 205; 305) comprises a wheel unit shaft (105.1) and at least one wheel (105.2). The wheel unit shaft (105.1) defines an axis of rotation (105.3), the axis of rotation (105.3) defining an axial direction and a radial direction of the wheel unit (105) as well as a torsional direction about the axis of rotation (105.3). The wheel (105.2) is coupled to the wheel unit shaft (105.1) in a torsionally rigid manner about the axis of rotation (105.3) and is configured to run on a track. The first torsional vibration reduction mass unit (108) comprises a first torsional vibration reduction mass (108.1) coupled to the wheel unit (105) in a torsionally compliant manner about the axis of rotation (105.3) via at least one torsional linking arrangement (112, 113). The torsional linking arrangement (112, 113) is compliant in the circumferential direction and comprises a first support element (112.1), a second support element (112.2), and a first spring element (112.4). The first spring element (112.4) is arranged and acts kinematically in series between the first support element (112.1) and the second support element (112.2) to provide the compliance of the linking arrangement (112, 113) at least in a first torsional direction along the circumferential direction. At least in a neutral state, a gap (G) is formed between the first spring element (112.4) and the first support element (112.1) to provide the compliance in the first torsional direction.