Backlash correction system for compound planetary gear train

Patent metadata

Field	Value
Publication number	US-10036450-B2
Application number	US-201615084691-A
Country	US
Kind code	B2
Filing date	Mar 30, 2016
Priority date	Mar 30, 2015
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

A compound planetary gear train includes a sun gear, a stationary annulus gear, a first set of planet gears meshing with the stationary annulus gear, a moving annulus gear and a second set of planet gears meshing with the sun gear and the moving annulus gear. The planet gears are biased into contact with the annulus gears.

First claim

The invention claimed is:

1. A compound planetary gear train, including:
a sun gear;
a stationary annulus gear;
a first set of planet gears meshing with the stationary annulus gear;
a moving annulus gear; and
a second set of planet gears meshing with the sun gear and the moving annulus gear;
wherein the planet gears are biased into contact with the annulus gears;
wherein the planet gears are mounted on shafts carried on an annulus surrounding the sun gear, and the shafts are biased radially outwardly;
wherein the annulus is divided into a number of annular sectors, each pair of neighbouring sectors having radial end faces which face each other, and the radial end faces being biased away from each other.

2. A compound planetary gear train as claimed in claim 1 , wherein springs are disposed between each pair of facing radial end faces.

3. A compound planetary gear train as claimed in claim 1 , wherein each annular sector carries a shaft.

4. A compound planetary gear train as claimed in claim 2 , wherein each annular sector carries a shaft.

5. A compound planetary gear train as claimed in claim 1 , wherein the annulus is divided into four annular sectors.

6. A compound planetary gear train as claimed in claim 2 , wherein the annulus is divided into four annular sectors.

7. A compound planetary gear train as claimed in claim 3 , wherein the annulus is divided into four annular sectors.

8. A compound planetary gear train as claimed in claim 4 , wherein the annulus is divided into four annular sectors.

9. A flight control actuator incorporating the compound planetary gear train of claim 1 .

Assignees

• Goodrich Actuation Systems Sas

Inventors

• Chhour Bertrand

Classifications

• F16H1/2863 Primary

  Arrangements for adjusting or for taking-up backlash · CPC title

• B64C13/34

  using toothed gearing · CPC title

• F16H2001/2872

  comprising three central gears, i.e. ring or sun gear, engaged by at least one common orbital gear mounted on an idling carrier · CPC title

• F16H57/082

  Planet carriers · CPC title

• F16H1/46

  Systems consisting of a plurality of gear trains each with orbital gears, {i.e. systems having three or more central gears} · CPC title