Chassis for a rail vehicle

A chassis for a rail vehicle having wheel sets with axles and axle bearings, the chassis comprising:

• a chassis frame supported at least on a first wheel set and a second wheel set of the rail vehicle;
• an A-arm disposed on each wheel set on both sides of the chassis for horizontally guiding the axle of the wheel set;
• a wheel-set-side bearing hinging a respective said A-arm to one of two axle bearings of a wheel set and two frame-side bearings hinging said A-arm to said chassis frame;
• said frame-side bearings having elastomer bushings with constant longitudinal and transverse rigidity and said wheel-set-side bearings having hydraulic bushings with constant transverse rigidity and variable longitudinal rigidity;
• said frame-side and wheel-set-side bearings of each said A-arm being arranged on corners of a horizontally aligned isosceles triangle, the triangle having a tip forming said wheel-set-side bearing and a base forming said frame-side bearings,
• each of said hydraulic bushings having an externally located fluid chamber in a longitudinal direction and an internally located fluid chamber in the longitudinal direction, which are arranged opposite one another in the longitudinal direction and are filled with a hydraulic fluid, each of said fluid chambers being connected to a fluid duct through which hydraulic fluid can flow into or out of the fluid chamber, wherein the longitudinal rigidity of said hydraulic bushing varies as a function of an excitation frequency of fluid flows forced into or out of a fluid chamber by wheel set guiding forces;
• said hydraulic bushings arranged on a same chassis side are connected via external fluid ducts such that said externally located fluid chamber of said first wheel set is hydraulically coupled to said internally located fluid chamber of said second wheel set and said internally located fluid chamber of said first wheel set is hydraulically coupled to said externally located fluid chamber of said second wheel set;
• a pressure sensor assigned to and coupled with each said fluid chamber via a fluid duct, said pressure sensor responding when a pressure prevailing in the hydraulic fluid falls below a pre-defined threshold value, said pressure sensors being connected individually and/or serially to a pressure monitoring device, and the pressure monitoring device is configured for transmitting a warning signal to a central control device of the rail vehicle when one or all of said pressure sensors respond.