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US 10,655,708 B2Granted
Epicyclic gear train, advantageously for a servomotor system, method and servomotor system using such an epicyclic gear train
AssigneeBernard Controls
InventorsEtienne Bernard, Rémy Lepan
Life of this patent
Estimating the term…
Abstract
An epicyclic gear train for a servomotor system includes a case, and, positioned in the case, a planet carrier carrying planet gears, a ring gear, and a sun gear. The epicyclic gear train includes a control for changing input and output speed ratio in response to an input applied from outside the case.
Claims11
An epicyclic gear train including:
- a case;
- a gear train disposed within the case, having an axis, and comprising a plurality of planet gears, a planet carrier carrying the plurality of planet gears, a ring gear, and a sun gear,
- a rotatable input member;
- a rotatable output member coupled to the input member by the gear train so that rotation of the input member at an input speed rotates the output member at an output speed that has a speed ratio relative to the input speed;
- and
- control means actuable from outside the case, for changing the speed ratio;
- wherein the ring gear is rotatingly mounted in the case and the control means imposes on the ring gear a rotation speed determined to produce a first speed ratio, and secures the ring gear and the planet carrier in rotation to produce a second speed ratio, and
- wherein the ring gear and the planet carrier include outer teeth and the control means comprises a pinion that is movable between a meshing position meshing with only the outer teethes of the ring gear, and a securing position securing the ring gear to the planet carrier in rotation by meshing of the outer teeth of the ring gear and the planet carrier.
5 more elements
A method for controlling a rotating actuator member of a a valve, comprising:
- rotating the rotating actuator member by rotating a manually actuated hand wheel, between an open position of the valve and a closed position of the valve, wherein the rotation of the actuator member from the open position to the closed position includes a first face for approaching the closed position in which torque necessary is relatively low, and a second phase for reaching the closed position in which the torque necessary is relatively high, and
- multiplying during the first approach phase relative to the second phase, number of revolutions of the handwheel relative to number of revolutions of the rotating actuator member.
Dependencies are inferred from the claim text.