公开(公告)号：US20210309381A1

公开(公告)日：2021-10-07

申请号：US17161183

申请日：2021-01-28

Applicant: Bell Textron Inc.

Inventor： Colton James Gilliland ,  Mark Alan Przybyla ,  Eric Stephen Olson

IPC: B64D27/02 ,  B64C29/00 ,  B64D27/10 ,  B64D27/24

Abstract: An exemplary tiltrotor aircraft with a hybrid drive system includes a first propulsion system having a first engine and a first supplemental driver operably coupled to a first proprotor that is operable between a helicopter mode and an airplane mode and a second propulsion system having a second engine and a second supplemental driver operably coupled to a second proprotor that is operable between a helicopter mode and an airplane mode.

公开(公告)号：US20210061452A1

公开(公告)日：2021-03-04

申请号：US17037476

申请日：2020-09-29

Applicant: Bell Textron Inc.

Inventor： Eric Stephen Olson ,  David Andrew Prater

IPC: B64C27/12 ,  B64D27/10 ,  B64D27/24 ,  B64D35/02 ,  B64C27/06 ,  F16D41/08 ,  F16D48/02 ,  F16D28/00 ,  F16D25/062

Abstract: A failsafe multimode clutch assembly is positioned in a powertrain of a rotorcraft. The clutch assembly includes a freewheeling unit having input and output races. The freewheeling unit has a driving mode in which torque applied to the input race is transferred to the output race and an overrunning mode in which torque applied to the output race is not transferred to the input race. A bypass assembly has an engaged position that couples the input and output races of the freewheeling unit. An actuator assembly must be energized to shift the bypass assembly from the engaged position to a disengaged position. In the disengaged position, the overrunning mode of the freewheeling unit is enabled such that the clutch assembly is configured for unidirectional torque transfer. In the engaged position, the overrunning mode of the freewheeling unit is disabled such that the clutch assembly is configured for bidirectional torque transfer.

公开(公告)号：US20200247553A1

公开(公告)日：2020-08-06

申请号：US16567086

申请日：2019-09-11

Applicant: Bell Textron Inc.

Inventor： David Andrew Prater ,  Eric Stephen Olson

IPC: B64D35/00 ,  F16D41/00 ,  F16D48/02

Abstract: A multimode clutch assembly is positioned in a powertrain of a rotorcraft. The multimode clutch assembly includes a freewheeling unit having input and output races. The freewheeling unit has a driving mode in which torque applied to the input race is transferred to the output race and an overrunning mode in which torque applied to the output race is not transferred to the input race. A bypass assembly has an engaged position that couples the input and output races of the freewheeling unit. A hydraulic actuator shifts the bypass assembly between the engaged position and a disengaged position. In the disengaged position, the overrunning mode of the freewheeling unit is enabled such that the multimode clutch assembly is configured for unidirectional torque transfer. In the engaged position, the overrunning mode of the freewheeling unit is disabled such that the multimode clutch assembly is configured for bidirectional torque transfer.