Conjunto de mancal de carga de contato constante para uma travessa de balanço de truque de um vagão ferrovíario e vagão ferroviário operável para sustentar carga

A constant-contact load-bearing assembly (10) for a railcar bogie bolster (12) and operable against a complementary body bolster bearing (14) and biased to continuously contact the body-bolster bearing (14) to transfer the lading and railcar weight forces, which assembly (10) has an outer element (26) of a first coefficient of friction, a second or inner element (28) with a second and larger coefficient of friction and biasing means (46,48) to maintain the inner assembly pad element (28) in contact with the body-bolster assembly (16) at an empty-railcar condition to provide control of the railcar body (20) at the empty or unloaded car status with the biasing means (46,48) compressible at a loaded railcar state to provide contact between the outer pad element (26) and the body-bolster bearing pad (14) for transfer of the railcar loads and forces over the range of operating loads between the empty-car state and the loaded to capacity state.