Patent ID: 9616990
Date: 2017-04-11
CPC Classifications: B64C,F16D,F16H

Claim:
1. A rotary device assembly, comprising: an input shaft coupled to a torque generating device; an output shaft; and a rotary device comprising: an output portion with a skewed roller assembly loaded by pre-load springs and a ball ramp assembly such that the skewed roller assembly provides variable drag torques which are variable based on the loads of the pre-load springs and the ball ramp assembly; and an input portion comprising a thrust plate rotatable with the input shaft and having a dimple defining first axial surface, an output cone shaft rotatable with the output shaft and having a ramp defining second axial surface complementary to the first axial surface and spherical balls disposable in the dimples and the ramps by which the first torque is transmittable from the input shaft to the output shaft, the spherical balls being drivable out of the ramps in the event the second torque exceeds a torque-limiting threshold, and the rotary device being disposed to transmit first torque from the input shaft to the output shaft and configured with: no-back capability to prevent second torque applied to the output shaft from being transmitted to the input shaft in an event the second torque deceeds the torque-limiting threshold, and the no-back capability and torsional lock-up capability to prevent an overload of the torque generating device in an event the second torque exceeds the torque-limiting threshold, the rotary device further comprising an elastic element by which the output cone shaft is coupled to the output shaft, the elastic element being pre-loaded to prevent engagement of the torsional lock-up capability in the event the second torque deceeds the torque-limiting threshold.