Safran Transmission Systems

Julie Marie Renée Lemoine

Alexis Claude Michel Dombek

Balint Pap

The invention relates to a pivot pin () for an epicyclic gear train sliding bearing, the pivot pin having a portion () forming a central shank, extending around an axial passage (), and axially opposed, axially open circumferential grooves () which radially separate two axially opposed lateral end portions () of the central shank from two cantilevered lateral portions (). With respect to a plane () perpendicular to said axis of the axial passage () and passing through the axial middle of the axial passage, the axial distance between said plane () and the bottom end of one of the circumferential grooves () is smaller than the axial distance between said plane and the bottom end of the axially opposed circumferential groove ().

Pivot and gear train

A pivot for a sliding bearing of an epicyclic train includes an annular wall delimiting an axial passage, the annular wall including a first and a second annular groove opening axially in opposite directions and each defined by two coaxial inner and outer annular branches formed at the axial ends of the annular wall. The pivot also includes a plurality of first holes opening at a first end into the first annular groove and at a second opposite end into the second annular groove, these holes being made over an angular sector of between 5&#xb0; and 330&#xb0;.

Pivot for a sliding bearing

The invention relates to a pivot () for a sliding bearing of an epicyclic train, comprising an annular wall () defining an axial passage () and comprising a first () and a second () annular groove opening axially in opposite directions (L, L) and each defined by two coaxial inner () and outer () annular branches formed at the axial ends of the annular wall (). According to the invention, the recesses () are made in at least one bottom wall () of one of the annular grooves ().

The invention relates to a pivot pin () for an epicyclic gear train sliding bearing, having axially opposed, laterally open circumferential grooves () providing flexibility to the pivot pin, each groove having a radial width and at least one depth (P). At least one of the circumferential grooves () has a said width and/or depth (P) which varies circumferentially.

Pivot for sliding bearing and gear train

The invention relates to a pivot pin () for an epicyclic gear train sliding bearing, the pivot pin having axially opposed, laterally open circumferential grooves (), providing flexibility to the pivot pin and which radially separate two axially opposite lateral end portions of a central shank from two lateral cantilevered portions () of the pivot pin. At least one of the cantilevered lateral portions is hollowed out by at least one recess ().

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Moissy-Cramayel, France

Julie Marie Renée Lemoine