Braking assembly
First Claim
1. A no-back braking assembly for a rotary actuator, the braking assembly comprising:
- a rotatable input shaft;
a rotatable output shaft, said output shaft being co-axial with said input shaft;
a braking arrangement operably coupled with said output shaft, said braking arrangement comprising first and second braking members and a biasing arrangement; and
a torque transfer device mounted between said shafts for transferring torque applied to said input shaft to said output shaft, wherein said first and second braking members are relatively moveable between a first position in which they are in mutual engagement and in which rotation of said output shaft is braked, and a second position in which they are mutually spaced and in which said output shaft is capable of relatively free rotation, the biasing arrangement being arranged to urge the braking members into their first position, and wherein said torque transfer device is arranged to overcome said biasing arrangement, whereby to urge said first and second braking members into their second position upon application of torque above a predetermined threshold to said input shaft, and to cause rotation of said output shaft.
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Accused Products
Abstract
A no-back braking assembly for a rotary actuator includes a rotatable input shaft, a rotatable output shaft, wherein said output shaft is co-axial with said input shaft, and a braking arrangement operably coupled with said output shaft. The braking arrangement comprises first and second braking members and biasing means, and a torque transfer device mounted between said shafts for transferring torque applied to said input shaft to said output shaft. The first and second braking members are relatively moveable between a first position in which they are in mutual engagement and in which rotation of said output shaft is braked, and a second position in which they are mutually spaced and in which said output shaft is capable of relatively free rotation, the biasing arrangement being arranged to urge the braking members into their first position. The torque transfer means is arranged to overcome said biasing arrangement, whereby to urge said first and second braking members into their second position upon application of torque above a predetermined threshold to said input shaft, and to cause rotation of said output shaft.
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Citations
14 Claims
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1. A no-back braking assembly for a rotary actuator, the braking assembly comprising:
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a rotatable input shaft;
a rotatable output shaft, said output shaft being co-axial with said input shaft;
a braking arrangement operably coupled with said output shaft, said braking arrangement comprising first and second braking members and a biasing arrangement; and
a torque transfer device mounted between said shafts for transferring torque applied to said input shaft to said output shaft, wherein said first and second braking members are relatively moveable between a first position in which they are in mutual engagement and in which rotation of said output shaft is braked, and a second position in which they are mutually spaced and in which said output shaft is capable of relatively free rotation, the biasing arrangement being arranged to urge the braking members into their first position, and wherein said torque transfer device is arranged to overcome said biasing arrangement, whereby to urge said first and second braking members into their second position upon application of torque above a predetermined threshold to said input shaft, and to cause rotation of said output shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An actuator for driving a flight control surface of an aircraft including a no-back braking assembly having a rotatable input shaft, and a rotatable output shaft which is coaxial with said input shaft, a brake arrangement coupled with said output shaft and having first and second braking members and a biasing arrangement, and a torque transfer device mounted between said input and output shafts for transferring torque applied to said input shaft to said output shaft, wherein said first and second braking members are relatively movable between a first position in which they are in mutual engagement and in which rotation of said output shaft is braked, and a second position in which they are mutually spaced and in which said output shaft is capable of relatively free rotation, whereby the biasing arrangement is arranged to urge the braking members into their first position, and wherein said torque transfer device is arranged to urge said first and second braking members into their second position, overcoming the force due to said biasing arrangement, when torque above a predetermined threshold is applied to said input shaft, thereby causing rotation of said output shaft.
Specification