POWER DRIVE Russian patent published in 2020 - IPC F16H25/22 B64C13/28 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, particularly, to power drive structures. Power drive (10) comprises lead screw (32) and nut assembly (25). Nut (25) assembly comprises primary nut (50) for transfer of load through power drive (10) along primary load transfer path and secondary nut (60) for transfer of load through power drive (10) along secondary path of load transfer. Secondary nut (60) comprises first and second parts (100, 102) movable relative to each other. When load is transmitted via power drive (10) along primary load transfer path, secondary nut (60) does not transmit load through power drive (10), wherein in case of primary load transfer failure, first and second parts (100, 102) move relative to each other, wherein such relative movement engages the first and second parts (100, 102) with lead screw (32) and provides load transfer through secondary nut (60) of power drive (10) along the secondary load transfer path.

EFFECT: possibility to avoid undesirable load of secondary path of load transfer during normal operation mode.

15 cl, 9 dwg