公开(公告)号：US12208886B2

公开(公告)日：2025-01-28

申请号：US18080187

申请日：2022-12-13

Applicant: Textron Innovations Inc.

Inventor： Charles Hubert Speller ,  Alan Wayne Falls ,  Nathan D. Sudek

IPC: B64C27/12 ,  B64C29/00 ,  F16C35/063

Abstract: A propulsion assembly for a rotorcraft. The propulsion assembly includes a mast having an internal ledge, a raceway station and an external ridge with at least a portion of the raceway station positioned axially between the internal ledge and the external ridge. A nonintegral raceway is receivable by the raceway station to form a press fit joint between the mast and the nonintegral raceway. A mast bearing assembly includes a plurality of bearings configured to engage an outer surface of the nonintegral raceway. The internal ledge is configured to generate a nonuniform normal force between the mast and the nonintegral raceway along the raceway station that axially biases the nonintegral raceway toward the external ridge, thereby securing the nonintegral raceway at the raceway station.

公开(公告)号：US20240190560A1

公开(公告)日：2024-06-13

申请号：US18080187

申请日：2022-12-13

Applicant: Textron Innovations Inc.

Inventor： Charles Hubert Speller ,  Alan Wayne Falls ,  Nathan D. Sudek

IPC: B64C27/14 ,  B64F5/10 ,  F16C19/18

CPC classification number: B64C27/14 ,  B64F5/10 ,  F16C19/18 ,  F16C2326/43

Abstract: A propulsion assembly for a rotorcraft. The propulsion assembly includes a mast having an internal ledge, a raceway station and an external ridge with at least a portion of the raceway station positioned axially between the internal ledge and the external ridge. A nonintegral raceway is receivable by the raceway station to form a press fit joint between the mast and the nonintegral raceway. A mast bearing assembly includes a plurality of bearings configured to engage an outer surface of the nonintegral raceway. The internal ledge is configured to generate a nonuniform normal force between the mast and the nonintegral raceway along the raceway station that axially biases the nonintegral raceway toward the external ridge, thereby securing the nonintegral raceway at the raceway station.