No-back brake having a limited authority damper
AssigneeThe Boeing Company
InventorsZachary M. Jones, Mark John Gardner, Geya Kairamkonda
Life of this patent
Estimating the term…
Abstract
A no-back brake system for an actuator includes a ball ramp mechanism. A drag brake assembly is configured to be coupled to a first portion of the ball ramp mechanism. A main brake assembly is configured to be coupled to an actuator and a second portion of the ball ramp mechanism. A limited authority damper assembly is disposed between the drag brake assembly and the main brake assembly. The limited authority damper assembly includes an outer spacing ring configured to be coupled to the drive shaft of the actuator, an inner damping ring coupled to the outer spacing ring and the drag brake assembly, and a first spring disposed between the outer spacing ring and the inner damping ring.
Claims20
A no-back brake system for an actuator, the no-back brake system comprising:
- a ball ramp mechanism;
- a drag brake assembly configured to be coupled to a first portion of the ball ramp mechanism;
- a main brake assembly configured to be coupled to an actuator and a second portion of the ball ramp mechanism;
- and
- a limited authority damper assembly disposed between the drag brake assembly and the main brake assembly, wherein the limited authority damper assembly comprises:
- an outer spacing ring configured to be coupled to a drive shaft of the actuator, wherein the outer spacing ring comprises a collar, and an extension wall extending away from an outer rim of the collar toward the drag brake assembly;
- an inner damping ring coupled to the outer spacing ring and the drag brake assembly;
- and
- a first spring disposed between the outer spacing ring and the inner damping ring.
An actuator configured to control motion of one or more control surfaces of an aircraft, the actuator comprising:
- a drive shaft;
- and
- a no-back brake system coupled to the drive shaft, the no-back brake system comprising:
- a ball ramp mechanism;
- a drag brake assembly coupled to a first portion of the ball ramp mechanism;
- a main brake assembly coupled to the actuator and a second portion of the ball ramp mechanism;
- and
- a limited authority damper assembly disposed between the drag brake assembly and the main brake assembly, wherein the limited authority damper assembly comprises:
- an outer spacing ring coupled to the drive shaft of the actuator, wherein the outer spacing ring circumferentially extends around the drive shaft, wherein the outer spacing ring comprises a collar, and an extension wall extending away from an outer rim of the collar toward the drag brake assembly;
- an inner damping ring coupled to the outer spacing ring and the drag brake assembly;
- and
- a first spring disposed between the outer spacing ring and the inner damping ring.
An aircraft comprising:
- one or more control surfaces;
- an actuator configured to control motion of the one or more control surfaces, the actuator comprising:
- a drive shaft;
- and
- a no-back brake system coupled to the drive shaft, the no-back brake system comprising:
- a ball ramp mechanism;
- a drag brake assembly coupled to a first portion of the ball ramp mechanism, wherein the drag brake assembly includes one or more stators having a channel, and one or more rotors;
- a main brake assembly coupled to the actuator and a second portion of the ball ramp mechanism;
- and
- a limited authority damper assembly disposed between the drag brake assembly and the main brake assembly, wherein the limited authority damper assembly comprises:
- an outer spacing ring coupled to the drive shaft of the actuator, wherein the outer spacing ring circumferentially extends around the drive shaft, wherein the outer spacing ring comprises a collar, and an extension wall extending away from an outer rim of the collar toward the drag brake assembly;
- an inner damping ring coupled to the outer spacing ring and the drag brake assembly, wherein a portion of the inner damping ring passes through the channel and abuts against the one or more rotors;
- a first spring disposed between the outer spacing ring and the inner damping ring;
- and
- a second spring disposed between the outer spacing ring and the main brake assembly.
Dependencies are inferred from the claim text.