A rotary actuator (200, 20) for a hinged panel assembly (190, 19), e.g., of a fixed-wing aircraft (10), includes ball bearings (42), an outer cylinder (126, 26), a piston (24), and an inner shaft (225, 25). The outer cylinder (126, 26) admits fluid pressure from a fluid pressure supply (15). The piston (24) is circumscribed by the outer cylinder (126, 26). The piston (24), outer cylinder (126, 26), and ball bearings (42) collectively forming an outer ball screw (29). The piston (24) translates along a longitudinal center axis (A20) in response to the fluid pressure. The inner shaft (225, 25) is circumscribed by the piston (24), with the inner shaft (225, 25), piston (24), and ball bearings (42) collectively forming an inner ball screw (29) that is concentric with the outer ball screw (29). The ball screws form an interlaced ball circuit (50) with one or more shared ball paths (40). Piston (24) translation rotates the piston (24) and inner shaft (225, 25), and to thereby recirculates the ball bearings (42) between the outer ball screw (29) and the inner ball screw (29) through the interlaced ball circuit.
RECIRCULATING BALL SCREW ROTARY ACTUATOR
DREHANTRIEB MIT KUGELUMLAUFSPINDEL
ACTIONNEUR ROTATIF À VIS À BILLE RECIRCULANTE
2023-06-28
Patent
Electronic Resource
English