A final drive assembly is driven by an electric motor 12, 14, 16, 18 and includes a park and service brake arrangement including a shared disc brake pack 84 that is compressed by a preload exerted by a compression spring arrangement 106 defined by a stack of Belleville springs for establishing an engaged park brake condition in the absence of pressurized brake actuating fluid being routed to a park brake piston 102. An electrical control is provided for computing disc brake pack wear based on a stored load curve of the stack of Belleville springs containing information correlating preload amounts to various compressed heights of the stack of Belleville springs, and on the magnitude of a drive signal sent to the electric motor 12, 14, 16, 18 for causing sufficient drive torque to be developed for causing the rotor discs 86 of the engaged disc brake pack 84 to slip relative to the stator discs 92.
Measuring brake wear
Messung der Bremsenabnutzung
Mesure de l'usure de freins
2019-12-18
Patent
Electronic Resource
English