US 12,345,323 B2
Rotary EMA
Karl Potier, Paris (FR); and Sebastien Vandevoir, Gennevilliers (FR)
Assigned to GOODRICH ACTUATION SYSTEMS SAS, Vernon (FR)
Filed by Goodrich Actuation Systems SAS, Vernon (FR)
Filed on Oct. 4, 2024, as Appl. No. 18/906,703.
Claims priority of application No. 23306831 (EP), filed on Oct. 19, 2023.
Prior Publication US 2025/0129843 A1, Apr. 24, 2025
Int. Cl. F16H 57/08 (2006.01); B64C 13/34 (2006.01); F16H 1/28 (2006.01)
CPC F16H 57/082 (2013.01) [B64C 13/34 (2013.01); F16H 1/2827 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electromechanical actuator (EMA) assembly comprising:
an electric motor;
a drive shaft in engagement with the motor to be rotated about a shaft axis by operation of the motor;
an output ring around the drive shaft, the output ring caused to rotate with rotation of the drive shaft, the output ring configured to be connected, in use, to a load to be driven by the EMA;
a gear assembly between the drive shaft and the output ring to transmit rotation of the drive shaft to rotation of the output ring at a gear ratio, wherein the gear assembly comprises a sun gear in engagement with the drive shaft, an outer gear in engagement with the outer ring, and planetary gears rotating between and transmitting rotation between the sun gear and the outer gear;
a planet carrier plate mounted to the planetary gears to rotate with the planetary gears, the planet carrier having an inner surface adjacent the planetary gears and an opposite outer surface, the outer surface having a cammed profile with respect to the axial direction, the cam profile rotating about the axis as the planetary gears and, therefore, the output ring rotate; and
an interface plate adjacent the outer surface, the cammed profile being such as to engage the interface plate or not engage the interface plate, depending on the rotational position of the planet carrier plate.