Aircraft actuator torque limiter, actuator, aircraft and related process
AssigneeDassault Aviation
InventorAntoine Patrick Faure
Life of this patent
Estimating the term…
Abstract
An aircraft actuator torque limiter includes a disengageable torque transmitter between a rotary shaft and a driven member. The disengageable transmitter includes a friction pack including at least one contact member mounted secured in rotation with the rotary shaft and a complementary contact member, mounted secured in rotation with the driven member. The transmitter includes a clamp of the friction pack and a mover of the clamp, able to contract or expand differentially relative to the rotary shaft along the axis of rotation during a temperature variation. The clamp mover is made from a second material having a thermal expansion coefficient different from that of the first material forming the rotary shaft.
Claims16
An aircraft actuator torque limiter configured to be mounted between a motor and an actuating member mover configured to be driven in rotation by the motor, the torque limiter comprising:
- a rotary shaft configured for rotating about a rotation axis, the rotary shaft being formed from a first material having a first thermal expansion coefficient;
- a driven member configured for being driven in rotation about the rotation axis by the rotary shaft,
- one of the rotary shaft and of the driven member being configured to be connected to the motor, another one of the rotary shaft and the driven member being configured to be connected to the actuating member mover;
- a disengageable torque transmitter configured to transmit torque between the rotary shaft and the driven member, the disengageable torque transmitter comprising a friction pack including at least one contact member mounted secured in rotation with the rotary shaft and a complementary contact member mounted secured in rotation with the driven member, the complementary contact member being configured to be rotated by the rotary shaft about the axis of rotation jointly with the contact member if the torque applied between the contact member and the complementary contact member is below a torque threshold value, the complementary contact member being rotatable relative to the contact member about the axis of rotation if the torque applied between the contact member and the complementary contact member is greater than or equal to the threshold value,
- the disengageable transmitter including a friction pack clamp to clamp the friction pack comprising the contact member and the complementary contact member, along the axis of rotation,
- the disengageable transmitter including a clamp mover configured to move the friction pack clamp, the clamp mover being configured to contract or expand differentially relative to the rotary shaft and relative to the friction pack along the axis of rotation during a temperature variation, the clamp mover being made from a second material having a second thermal expansion coefficient different from the first thermal expansion coefficient of the first material forming the rotary shaft.
Dependencies are inferred from the claim text.