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US 4,412,794 AGranted
Ultra-high torque actuators
AssigneeThe Bendix Corporation
InventorRex W. Presley
Life of this patent
Estimating the term…
Abstract
An actuator for rotating an output member, having an epicyclic transmission adapted to rotate the output member in response to the motion of a rotor which contains a plurality of radial projections which interact with a stator or non-rotating portion of the actuator to produce a rotating tangential force vector directed substantially perpendicular to the radial projections.
Claims9
An actuator comprising:
- an output member rotatably mounted therein;
- epicyclic transmission means, for driving said output member in response to forces input thereto;
- rotor means, eccentrically mounted relative to the axis of rotation of said output member, and adapted to rotatably engage said transmission means;
- wherein said rotor includes radially projecting rectangular poles;
- first means for producing on a specified member of said poles a force vector directed substantially perpendicular thereto;
- reaction means for causing said rotor to move in an orbiting, non-rotating manner relative to said output axes, wherein said rectangular poles contain material reactive to magnetic forces and wherein said rectangular poles are located equidistant from one another;
- and wherein said first means includes:
- stator means responsive to electrical actuation signals for generating a magnetic field proximate to a predetermined number of said rectangular poles, said magnetic field interacting with said predetermined number of poles and directed perpendicular to the radius vector from the center of said rotor means through each of said poles, said stator means including two stator poles oriented perpendicular to each of said rectangular poles, wherein each of said stator poles carries an electrical coil adapted to receive the electric actuation signal and wherein the plane of each electric coil is parallel to its respective rectangular pole.
5 more elements
An actuator comprising:
- an output member rotatably mounted therein including an output gear supporting a shaft defining an axis of rotation, including a first set of bearings positioned coaxially to the axis and juxtaposed on each side of said output gear, each bearing of said first set of bearings supported within a cup-shaped cavity within a housing;
- epicyclic transmission means for driving said output member in response to forces input thereto including a second set of bearings wherein each bearing of said second set of bearings is positioned in coaxial alignment about a corresponding one of said bearings of said first set of bearings and spaced therefrom by the walls of the corresponding cup-shaped cavity;
- rotor means, eccentrically mounted relative to the axis of rotation of said output member, and adapted to rotatably engage said transmission means;
- wherein said rotor includes radially projecting rectangular poles;
- first means for producing on a specified number of said poles a rotating force vector directed substantially perpendicular thereto;
- reaction means for causing said rotor to move in an orbiting, non-rotating manner relative to said output axis, wherein said poles contain material reactive to magnetic forces and wherein said poles are located equidistant from one another;
- and wherein said first means includes:
- stator means responsive to electrical actuation signals for generating a magnetic field proximate to a predetermined number of said poles, said magnetic field interacting with said poles and directed perpendicular to the radius vector from the center of said rotor means through each of said poles, said stator means including two stator poles oriented perpendicular to each of said rectangular poles, wherein each of said stator poles carries an electrical coil adapted to receive the electric actuation signal and wherein the plane of each electric coil is parallel to its respective rectangular pole.
5 more elements
Dependencies are inferred from the claim text.