IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0413243
(2003-04-14)
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발명자
/ 주소 |
- Mayer,Edward
- Degenholtz,Arthur
- Vaghela,Naresh P.
|
출원인 / 주소 |
- Curtiss Wright Controls, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
10 |
초록
▼
A torque transfer limiting arrangement for a rotational drive shaft. The arrangement includes a torque sensing device for sensing torque within the drive shaft and outputing a signal indicative of the sensed torque. A braking device of the arrangement is actuatable for stopping the drive shaft from
A torque transfer limiting arrangement for a rotational drive shaft. The arrangement includes a torque sensing device for sensing torque within the drive shaft and outputing a signal indicative of the sensed torque. A braking device of the arrangement is actuatable for stopping the drive shaft from rotating. The arrangement also includes a portion for electrically causing operation of the braking device responsive to the signal indicative of the sensed torque above a predetermined value. In one example, the portion for electrically causing operation of the braking device includes a processor. In one example, the rotational drive shaft is part of an aircraft flap actuator system.
대표청구항
▼
Having described the invention, the following is claimed: 1. A torque transfer limiting arrangement for a single rotational drive shaft, the arrangement including: torque sensing means for sensing torque within the single unitary drive shaft and outputting a signal indicative of the sensed torque;
Having described the invention, the following is claimed: 1. A torque transfer limiting arrangement for a single rotational drive shaft, the arrangement including: torque sensing means for sensing torque within the single unitary drive shaft and outputting a signal indicative of the sensed torque; braking means actuatable for stopping the drive shaft from rotating; and means for electrically causing operation of the braking means responsive to the signal indicative of the sensed torque above a predetermined value; wherein the rotational drive shaft is part of an aircraft flap actuator system, and wherein the torque measuring means includes two angular position resolvers positioned at two separate locations on the drive shaft. 2. An arrangement as set forth in claim 1, wherein the drive shaft includes a portion that provides a torsion shaft, one end of the torsion shaft being rotatable relative to another end of the torsion shaft in response to applied torque, each resolver being located at a respective end of the torsion shaft. 3. A torque transfer limiting arrangement for a single rotational drive shaft of an aircraft flap actuator system, wherein rotation of the drive shaft applies force to an aircraft flap, the arrangement including: braking means actuatable for stopping the single drive shaft from rotating; actuation means, responsive to a control signal, to cause actuation of the braking means; torque sensing means operational upon only the single drive shaft for sensing torque within the single drive shaft and outputting a signal indicative of the sensed torque within the single drive shaft; and processor means, operatively connected to receive the signal indicative of the sensed torque from the torque sensing means and to provide the control signal to the actuation means, for processing the signal indicative of the sensed torque and determining the need to actuate the braking means when the torque within the single drive shaft exceeds a preset threshold level determined by the processor based upon selected parameters, wherein the torque measuring means includes two angular position resolvers positioned at two separate locations on the drive shaft. 4. An arrangement as set forth in claim 3, wherein the drive shaft includes a portion that provides a torsion shaft, one end of the torsion shaft being rotatable relative to another end of the torsion shaft in response to applied torque, each resolver being located at a respective end of the torsion shaft. 5. A computer-controlled torque limiting arrangement including: a housing having a rotatable main shaft running axially there through; a torque measuring mechanism, including a torsion shaft provided as a section of the main shaft and position sensors for measuring twist of the torsion shaft; a braking mechanism contained within the housing, the braking mechanism having a plurality of rotatable brake disks disposed about the main shaft, a plurality of fixed brake disks disposed about the main shaft, and rotatable brake plate means disposed about the main shaft, the rotatable brake disks being coupled to the main shaft, the plurality of rotatable brake disks being spline-coupled to the brake plate means, and the braking mechanism is releasable such that the brake plate means increases frictional engagement between the rotatable brake disks and the fixed brake disks to stop rotation of the main shaft; an electric trip mechanism having a solenoid activated electric clutch responsive to an electrical trigger signal that allows a drive train to convert rotational motion of the main shaft into translational motion of a trigger sleeve; and a control computer for processing input criteria and for sending output signals based on the input criteria, the output signals will allow the control computer to activate the electrical trip mechanism, which releases a locking mechanism, which in turn actuates the brake mechanism, wherein the brake mechanism stops the rotatable main shaft from rotating. 6. An arrangement as set forth in claim 5, wherein the control computer includes a microprocessor. 7. An arrangement as set forth in claim 5, wherein the brake plate means includes an outboard brake plate, an inboard brake plate, and a plurality of brake balls, wherein the plurality of brake balls are captively disposed between the outboard brake plate and the inboard brake plate, wherein the outboard brake plate is directly coupled to the main shaft, wherein the inboard brake plate is spline-coupled to the plurality of the rotatable brake disks, wherein the inboard brake plate is forcibly biased toward and against a ball retention sleeve by a brake plate spring means, and wherein the outboard brake plate and the inboard brake plate are forcibly opposed by the brake plate spring means. 8. An arrangement as set forth in claim 7, wherein the trigger sleeve has a spring shoulder formed therein, and including a trigger sleeve spring means is disposed against the spring shoulder for biasing the trigger sleeve into a position that holds the brake mechanism against release. 9. An arrangement as set forth in claim 5, wherein the torque measuring mechanism includes a sleeve having multiple sets of splines with free-play on one set of the splines, whereby the splined sleeve will by-pass system torque from the torsion shaft after a specific deflection is reached in the torsion shaft. 10. An arrangement as set forth in claim 8, wherein the inboard brake plate is forcibly biased toward and against the ball retention sleeve by the brake plate spring means through a ball bearing. 11. An arrangement as set forth in claim 5, further including a trip indication mechanism contained within the brake housing for indicating whether brake mechanism has been released to stop rotation of the main shaft.
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