Aircraft actuator with no-back, load detent assembly
A load detent assembly for restricting creep of a rotating assembly of an actuator used to actuate an aircraft flight control surface. The load detent assembly includes an engagement member having circumferentially spaced engagement surfaces/protruding portions, and a load detent having a stoppage member radially biasable towards the engagement member for interengagement between the engagement surfaces to restrict creep of the rotating assembly. One of the engagement member or the load detent is configured for rotation radially inward of the other of the engagement member or the load detent through at least 360 degrees of rotation. The other of the engagement member or the load detent is configured for being fixed radially outward of the one of the engagement member or the load detent.
1. An actuator for moving a control surface, the actuator comprising:
an actuator housing;
a rotating assembly mounted in the actuator housing having a driven component that is rotatably drivable about a longitudinal axis; and
a load detent assembly including an engagement member coupled to one of the driven component of the rotating assembly or the actuator housing, and a load detent supported with respect to the actuator housing for radial movement relative to the longitudinal axis between a releasing position released from the engagement member and an engaging position interengaged with the engagement member for restricting rotation of the driven component of the rotating assembly relative to the actuator housing, wherein one of the engagement member or the load detent is configured for common rotation with the driven component through at least 360 degrees of rotation; and
wherein the radial movement of the load detent is along a load detent axis, and the load detent is constrained against lateral movement relative to the load detent axis.
2. The actuator of claim 1 , wherein the driven component is a first driven component that is rotatably drivable about the longitudinal axis to effect movement of a second driven component of the rotating assembly along the longitudinal axis.
3. The actuator of claim 1 , wherein the engagement member is coupled to the driven component for common rotation therewith through at least 360 degrees of rotation.
4. The actuator of claim 2 , wherein the driven component is a screw and the second component is a nut assembly.
5. The actuator of claim 1 , wherein the load detent includes a stoppage member that is supported for the radial movement, and wherein the stoppage member includes a bearing.
6. The actuator of claim 1 , wherein the load detent and the engagement member are configured to interengage upon biasing of a stoppage member of the load detent towards one or more engagement surfaces of the engagement member to restrict relative rotational separation in at least one rotational direction.
7. An actuator for moving a control surface, the actuator comprising:
an actuator housing;
a rotating assembly mounted in the actuator housing having a driven component that is rotatably drivable about a longitudinal axis; and
a load detent assembly including an engagement member coupled to one of the driven component of the rotating assembly or the actuator housing, and a load detent supported with respect to the actuator housing for movement relative to the longitudinal axis between a releasing position released from the engagement member and an engaging position interengaged with the engagement member for restricting rotation of the driven component of the rotating assembly relative to the actuator housing, wherein one of the engagement member or the load detent is configured for common rotation with the driven component through at least 360 degrees of rotation; and
wherein the actuator includes opposing skewed no-back roller assemblies for engaging the driven component.
8. The actuator of claim 1 , wherein the engagement member includes lobed engagement surfaces for engaging with the load detent.
9. The actuator of claim 1 , wherein a housing of the load detent is fixed relative to the actuator housing.
10. The actuator of claim 1 , wherein the load detent is configured to be continuously engaged with the engagement member.
11. The actuator of claim 1 , wherein the load detent is configured to be selectively engageable with the engagement member.