公开(公告)号：US20190323596A1

公开(公告)日：2019-10-24

申请号：US15961370

申请日：2018-04-24

Applicant: Bell Helicopter Textron Inc.

Inventor： Eric Stephen OLSON ,  David BOCKMILLER

IPC: F16H57/04

Abstract: An exemplary passive oil system includes a reservoir housing configured in operation to rotate around a rotational axis, the reservoir housing defining a reservoir between a top wall, a bottom wall, innermost side, and an outer sidewall; and an outlet positioned adjacent the outer sidewall to discharge a lubrication fluid contained in the reservoir in response to the reservoir housing rotating around the rotational axis.

公开(公告)号：US20190016451A1

公开(公告)日：2019-01-17

申请号：US15649217

申请日：2017-07-13

Applicant: Bell Helicopter Textron Inc.

Inventor： Ryan EHINGER ,  David BOCKMILLER ,  Eric SINUSAS

IPC: B64C27/14 ,  F16H3/08 ,  F16H59/44 ,  B64C29/00 ,  B64C27/52

Abstract: A variable-speed gearbox for a tiltrotor with fixed engine and rotating proprotor includes an input shaft coupled to the respective fixed engine, an output shaft coupled to the respective proprotor; a high-speed clutch integrated into a high-speed gear train, the high-speed gear train having an input coupled to the input shaft and an output coupled to the output shaft; and a low-speed clutch integrated into a low-speed gear train, the low-speed gear train having an input coupled to the input shaft and an output coupled to the output shaft. The high-speed clutch and the low-speed clutch can be freewheeling clutches capable of disconnecting the output and the input of the respective gear train of the high and low-speed gear trains in an overrunning condition when the output rotates faster than the input of the respective gear train. The low-speed clutch can be permanently engaged. In accordance to some embodiments the variable-speed gearboxes may include an accessory drive.