IP Library Granted Patent US 8,276,275
Granted Patent B2
US 8,276,275 · App. 12/718,436 · Granted Oct 2, 2012

Method for assembling an epicyclic gear train

Assignee: United Technologies Corporation
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Quick Facts
Patent No.
US 8,276,275
App. No.
12/718,436
Granted
Oct 2, 2012
Kind
B2
Abstract

A method is disclosed of assembling an epicyclic gear train comprising providing a carrier that includes spaced apart walls and circumferentially spaced mounts interconnecting the walls in a one-piece unitary structure. Spaced apart apertures are provided between the mounts at an outer circumference of the carrier. Gear pockets are provided between the walls and mounts extending to the apertures, and a central opening is provided in at least one of the walls. An intermediate gear is inserted through the central opening. The intermediate gear moves radially into the gear pocket to extend through the aperture. A baffle is inserted into the carrier in a space between the walls. A sun gear is inserted through the central opening to intermesh with the intermediate gear.

Claims (10)

1. A method of assembling an epicyclic gear train comprising the steps of:

a) providing a carrier that includes spaced apart walls and circumferentially spaced mounts interconnecting the walls in a one-piece unitary structure, spaced apart apertures provided between the mounts at an outer circumference of the carrier, gear pockets provided between the walls and mounts extending to the apertures, and a central opening in at least one of the walls;

b) inserting an intermediate gear through the central opening;

c) moving the intermediate gear radially into the gear pocket to extend through the aperture;

d) inserting a baffle into the carrier in a space between the walls subsequent to performing steps a) and b); and

e) inserting a sun gear through the central opening to intermesh with the intermediate gear.

2. The method according to claim 1 , wherein step d) includes securing the baffle to the carrier near the intermediate gear.

3. The method according to claim 2 , wherein step d) includes bolting the baffle to one of the walls.

4. The method according to claim 1 , comprising inserting a tube through a hole in the carrier to communicate with a lubrication passage in the baffle.

5. The method according to claim 1 , comprising securing a torque frame to the mounts, the torque frame fixed relative to a housing.

Assignments (3)
CHANGE OF NAME Recorded Jul 27, 2023
From: RAYTHEON TECHNOLOGIES CORPORATION
To: RTX CORPORATION
Reel/Frame 064714/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE AND REMOVE PATENT APPLICATION NUMBER 11886281 AND ADD PATENT APPLICATION NUMBER 14846874. TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED AT REEL: 054062 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF ADDRESS. Recorded Mar 4, 2021
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 055659/0001 →
CHANGE OF NAME Recorded Sep 4, 2020
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 054062/0001 →
Continuity (2)
Division 11481112 · Jul 5, 2006
Related Publication 20100154217A1 · Jun 24, 2010