Hydraulically regulated electromagnetic actuator, and landing gear fitted with such an actuator for controlling same

摘要

An electromechanical actuator comprising an electric motor (11) for driving an output shaft (4) in rotation via a reduction gear (20) and passive regulation stage (30) allowing for control of the speed of rotation of the output shaft. A braking member is arranged between an output of the reduction gear and the output shaft to be driven, the braking member being arranged to ensure two different braking levels depending on the direction of rotation of the shaft. The braking member is of hydraulic type and comprises a paddle (33) for transferring fluid between two chambers (34, 35) under the effect of the rotation of the output shaft, transferred fluid passing through a selective drawing member (41) which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the decantation of the fluid from one chamber to the other.

主权项

1. An electromechanical actuator comprising:
an electric motor (11) for driving an output shaft (4) in rotation via a reduction gear (20), passive regulation means (30) allowing for control of the speed of rotation of the output shaft, and a braking member, arranged between an output of the reduction gear and the output shaft to be driven, said braking member being arranged to ensure two different braking levels depending on the direction of rotation of the shaft, wherein the braking member is of hydraulic type and comprises means (33) for transferring fluid between a first chamber (34) and a second chamber (35), under the effect of the rotation of the output shaft through:
a first selective drawing member (41) which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the transfer of the fluid from one chamber to the other chamber, and through;a second selective drawing member which, depending on the direction of rotation of the actuator, opposes two distinct resistances to the transfer of the fluid from one chamber to the other chamber, said first and second selective drawing members being disposed in series and each one of said first and second selective drawing members comprising a restrictor (42) in parallel with a non-return valve (43) forcing the fluid to pass through the restrictor (42) when the fluid is transferred from the first chamber (34) to the second chamber (35), but shunting the restrictor (42) when the fluid is transferred from the second chamber (35) to the first chamber (34).