Flexible linking device for an aircraft propulsion system

摘要

A linking device including two hinge pins and having flexibility allowing vibrations between these two shafts to be filtered. The device includes a stack of plates connected to one another by layers of elastomer material. Plates of a first type are coupled to one of the shafts in relation to the movements parallel to the plates, while the plates of a second type are coupled to the other shaft in relation to the movements parallel to the plates, so as to allow relative movement of the shafts parallel to the plates. This linking device may be used in particular as a connecting rod, spreader beam or three-point shackle used in connecting a turbine engine to a pylon in a propulsion system of an aircraft such as an airplane.

主权项

1. A linking device including:
at least one first connecting unit including a first shaft; at least one second connecting unit including a second shaft; and connection means for connecting said connecting units to one another; wherein said connection means include a stack of layers of elastomer material and of plates made of a more rigid material placed in alternating fashion, such that each layer of elastomer material adheres to two consecutive plates of said stack, wherein said plates extend in parallel to one another; said layers of elastomer material and said plates include respective first apertures through which the first connecting unit extends, and also respective second apertures through which the second connecting unit extends; the projection of the first aperture of each layer of elastomer material, in the direction of said first shaft, fully encapsulates said first aperture of each of said plates; the projection of the second aperture of each layer of elastomer material, in the direction of said second shaft, fully encapsulates said second aperture of each of said plates; said plates include plates of two distinct types, positioned in alternating fashion; said first aperture of each plate of a first of the two said distinct types is shaped such that said first connecting unit traverses this aperture without any play; said second aperture of each plate of a second of the two said distinct types is shaped such that said second connecting unit traverses this aperture without any play; the section of said respective first apertures of the plates of the second type is widened compared to the section of the respective first apertures of the plates of the first type, and the section of said respective second apertures of the plates of the first type is widened compared to the section of the respective second apertures of the plates of the second type, such that said first and second shafts can move relative to one another, in parallel to said plates, by means of a shearing deformation of said layers of elastomer material.