Connection between two mounted elements articulated to each other.

Abstract

Connection between two mounted elements articulated to each other. The invention consists of a connection device (10) filtering translational vibrations between two elements under high load levels. The connection device (10) comprises: a first connecting rod (21) having at its end a first means for connecting (25) to the first element (31), and at least two through holes (27) distributed along the first connecting rod (21), each through hole receiving an annular ring made of a material with elastic properties (22); a second connecting rod (23) in the shape of a fork with through bores (28) having a second means for connecting (26) to the second element (30); and at least two shafts (24) aligned with the annular rings (22), making the first connecting rod (21) and the second connecting rod (23) fixed together. Figure for the abstract: Fig. 1

Description

Title of the invention: Connection between two mounted elements articulated to each other.

[0001] The present application relates to a connection between two elements and more particularly to a connection between a vibration-generating element, such as a motor, and its supporting structure.

[0002] In a conventional way, linking a vibrating element such as an aircraft engine to its supporting structure involves the installation of connecting elements which must support and dampen the vibrations moving in a single direction of translation, i.e. from the engine to its connecting element.

[0003] Vibration filtering systems in a single direction of translation, such as damper tubes, are used for this purpose. However, these systems are bulky, and there is a need to develop means of filtering vibrations in a single direction that combine both the ability to withstand high loads and compactness and lightness to allow their use on an aircraft.

[0004] The present invention aims to provide a solution to this need. Description of the invention

[0005] To this end, the invention consists of an assembly of a first element and a second element using a connecting device comprising:

[0006] - on the one hand, a first straight connecting rod of constant cross-section extending between a first and a second end, the first connecting rod comprising a first means of connection to the first element at its first end, as well as at least two through holes distributed along its length between the first means of connection and its second end, and

[0007] - on the other hand, a second connecting rod extending between a first and a second end, the second connecting rod comprising, from its first end to its second end, a straight body of constant section, extended by a forked part having at least two arms, parallel to each other and spaced apart, the second connecting rod comprising a means of connection to the second element at its first end and a plurality of through bores of the same diameter distributed on the arms, with at least two through bores per arm distributed along the length of the arm, the through bores of the arms being coaxial in pairs,

[0008] the first connecting rod being arranged between the two arms of the fork-shaped part of the second connecting rod, with the second end of the first connecting rod fitting into the fork-shaped part of the second connecting rod, each hole being arranged between two coaxial through bores.

[0009] The assembly is remarkable in that an annular ring made of a material having elastic properties is inserted into each of the through holes and in that for each through hole, a connecting pin is inserted into the two coaxial bores located on either side and opposite said hole and passes through the annular ring equipping said hole, so as to secure the first connecting rod to the second connecting rod.

[0010] Thus, a compact and lightweight articulated link is obtained between a fixed element and a vibrating element with a capacity to filter vibrations in one direction only, while combining a capacity to withstand high loads.

[0011] According to one embodiment, the annular rings are made of elastomeric material.

[0012] According to another embodiment, the annular rings are made of a metallic mesh.

[0013] Advantageously, the through holes are distributed uniformly between the first end and the second end of the first connecting rod. Description of the implementation methods

[0014] The features of the invention mentioned above, as well as others, will become clearer upon reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which:

[0015] [Fig-1] is a perspective view of a linking device 10 according to a mode of realization of the invention.

[0016] [Fig.2] is a cross-sectional view of the linking device 10 shown in [Fig.1].

[0017] [Fig.3] is an exploded view of the linking device 10 of [Fig.1].

[0018] With reference to Figures 1 to 3, the connecting device 10 is intended to connect a first vibrating element 31 and a second fixed element 30. This connecting device 10 comprises a first connecting rod 21 and a second connecting rod 23, fixed to each other by means of connecting pins 24.

[0019] By convention, X is the longitudinal axis of the connecting device 10 taken along its longest length. Z, on the other hand, is the transverse axis of the connecting device 10 extending along the thickness through which the various connecting axes 24 pass, and Y is the vertical axis or height of the connecting device 10, these three directions X, Y, and Z being orthogonal to each other.

[0020] The first connecting rod 21 is straight and of constant cross-section, extending between a first end 21o and a second end 21i. The connecting device 10 comprises, at its first end 21o, a first connecting means 25 to the first element 31. This first connecting means 25 takes, in the example shown in the figures, the form of a fitting. The fitting is inserted between the two arms of a clevis attached to the first element 31. The fitting and the arms of the clevis are drilled to allow the passage of an axle or a bolt to ensure the fixing of the first connecting rod 21 to the first element 31.

[0021] The first connecting rod 21 has at least two through holes 27, distributed along the first connecting rod 21 in the longitudinal direction X. In the case where the first connecting rod has more than two through holes 27, the holes are distributed uniformly between the first end 21o and the second end 21i of the first connecting rod 21.

[0022] Each of said through holes 27 accommodates a filtering device comprising an annular ring 22 made of a material having elastic properties.

[0023] The second connecting rod 23 extends between a first end 23o and a second end 23i, and comprises, between these and from the first end 23o, a straight body of constant cross-section, extended by a forked portion having two arms 23a and 23b, parallel to each other and spaced apart. In the embodiment shown in the figures, the two arms 23a and 23b are identical, except for symmetry with respect to the longitudinal axis X. The free end of the arms forms the second end 23i of the second connecting rod 23. At the first end 23o of the second connecting rod, the straight body includes a second connecting means 26 to the second fixed element 30. This second means of connection 26 takes, in the example shown in the figures, the form of a two-pronged yoke between which is inserted a fitting attached to the second element 30.The clevis and the fitting are drilled to allow the passage of an axle or a bolt to secure the second connecting rod 23 to the second element 30.

[0024] Each of the two branches 23a and 23b includes through bores 28. The bores are all of the same dimensions and a bore arranged on the first branch 23a is coaxial with a bore arranged on the second branch 23b. There are as many bores on each branch as there are holes on the first connecting rod, i.e. three in the example shown here in [Fig.1].

[0025] As shown in [Fig. 1], the second end of the first connecting rod 21 is inserted into the forked portion of the second connecting rod 23, and each bore 28 of one arm faces a through hole 27. A connecting pin 24, extending along the transverse axis Y, is inserted into each annular ring 22 fitted to a hole in the first connecting rod 21 and passes through the second connecting rod 23 via the bores 28 of the two opposing arms 23a and 23b. This arrangement secures the first connecting rod 21 to the second connecting rod 23 of the connecting device 10 and allows only small translational movements in the longitudinal direction (along the X axis) of the linking device 10, these movements being made possible thanks to the elasticity of the material of the annular rings 22.

[0026] In a preferred embodiment, the connecting axes 24 take the form of a bolt, constituting a screw 24 - nut 24' system ensuring the solidarity of the first connecting rod 21, the annular rings 22 and the second connecting rod 23 by tightening.

[0027] The design of such a linking device 10 then makes it easy to adapt the mechanical damping capacities of the link by modifying the number of holes / bores and / or the characteristics of the elastic material of the annular rings 22 to filter the vibrations between the first vibrating element 31 and the second fixed element 30.

[0028] The variety of dimensions and materials available on the market for rings made of materials with elastic properties offers a wide range of configuration options for the construction of the connecting device 10 and allows it to be adapted to any type of vibration intensity and frequency. The ring material consists, for example, of elastomer, rubber, polyurethane, or a metal mesh.

Claims

Demands

1. Assembly of a first element (31) and a second element (30) using a connecting device (10) comprising: - on the one hand, a first straight connecting rod (21) of constant cross-section extending between a first (21o) and a second end (21i), the first connecting rod comprising a first connecting means (25) to the first element (31) at its first end (21o), as well as at least two through holes (27) distributed along its length between the first connecting means (25) and its second end (21i), and - on the other hand, a second connecting rod (23) extending between a first (23o) and a second end (23i), the second connecting rod (23) comprising, from its first end (23o) to its second end (23i), a straight body of constant cross-section, extended by a forked portion having at least two arms (23a, 23b), parallel to each other and spaced apart from each other,the second connecting rod (23) comprising a means for connecting to the second element (30) at its first end (23o) and a plurality of through bores (28) of the same diameter distributed on the arms (23a, 23b), with at least two through bores (28) per arm distributed along the length of the arm, the through bores (28) of the arms (23a, 23b) being coaxial in pairs, the first connecting rod (21) being arranged between the two arms (23a, 23b) of the forked portion of the second connecting rod (23), with the second end (21i) of the first connecting rod (21) being inserted into the forked portion of the second connecting rod (23), each hole being arranged between two coaxial through bores (28), characterized in that an annular ring (22) made of a material having elastic properties is inserted into each through holes (27) and in that for each through hole (27),A connecting pin (24) is inserted into the two coaxial bores (28) located on either side and opposite said hole (27) and passes through the annular ring (22) fitting said hole, so as to secure the first connecting rod (21) to the second connecting rod (23).

2. Assembly according to claim 1 characterized in that the annular rings (22) are made of elastomeric material.

3. Assembly according to claim 1 characterized in that the annular rings (22) are made of a metallic mesh.

4. Assembly according to any one of claims 1 to 3, characterized in that the through holes (27) are distributed uniformly between the first end (21o) and the second end (21i) of the first connecting rod (21).