Method for manufacturing a fastening assembly comprising a connecting rod and a tenon

Abstract

[Title] Method for manufacturing a fastening assembly comprising a connecting rod and a tenon. Method for manufacturing a fastening assembly (11) comprising the following steps: - the placement (100) of the first and second contact rings (17, 18) in the first and second connecting portions (14, 15) of the connecting rod (12), the first and second contact rings (17, 18) comprising a first radial flange (23, 24) extending outwards from an axial portion (19, 20) and having a bearing surface (23b, 24b) against the connecting rod (12), - the formation (110) of a second radial flange (25, 26) extending outwards from the axial portion (19, 20) by deformation of the axial portion (19, 20), - the placement (120) of the tenon (13) and the first and second connecting portions (14, 15) of the connecting rod (12) around the fixing shaft (16), one of the first and second radial flanges (23, 24) being provided with a contact surface (23a,24a) coming axially into contact with the tenon (13) or opposite the tenon, leaving an axial space between the connecting rod (12) and the tenon (13). Figure 2,

Description

Title of the invention: Method for manufacturing a fastening assembly comprising a connecting rod and a tenon. Technical field of the invention

[0001] The present invention relates, in general, to connecting rods and the assembly of a connecting rod yoke and a tenon for fixing a connecting rod and a tenon on a fixing shaft.

[0002] More specifically, the invention relates to a fastening assembly comprising a fixing shaft, a connecting rod provided with two connecting portions and a tenon and to a method of manufacturing a fastening assembly comprising a fixing shaft, a connecting rod provided with two connecting portions and a tenon. Prior art

[0003] An existing fixing assembly 1, as shown in [Fig.1], includes a connecting rod clevis 2 provided with two connecting portions 3 and 4, and a tenon 5 mounted on a fixing shaft 6 for fixing the connecting rod 2 and the tenon 5 around the fixing axis X.

[0004] The two connecting portions 3 and 4 are generally formed of a carbon fiber reinforced plastic material and the tenon is formed of metal such as aluminium.

[0005] Conventionally, two contact rings 7 and 8 are also interposed radially between the fixing shaft 6 and the connecting portions 3 and 4.

[0006] The proximity and contacts resulting from the fixing of the connecting rod 2 and the tenon 5 lead to the appearance of galvanic corrosion at the interface between the connecting portions 3 and 4 and the tenon 5. However, this phenomenon leads to premature wear of the fixing assembly 1.

[0007] In order to eliminate this risk of galvanic corrosion, it is known to deposit a layer 9, 10 of glass fiber reinforced plastic material, generally in the form of a fold, on the surface of the connecting portions 3 and 4 coming into contact with the tenon 5.

[0008] However, the addition of such a layer 9, 10 on the connecting portions of the connecting rod increases the weight of the fastening assembly 1.

[0009] Given its nature and manufacturing steps, layer 9, 10 makes obtaining the fastening assembly 1 also particularly expensive.

[0010] Furthermore, the presence of glass fibers in layer 9, 10 does not allow the carbon fibers of the carbon fiber reinforced plastic material of the connecting portions 3 and 4 of the connecting rod 2 to be recycled after disposal of the fastening assembly 1. Summary of the invention

[0011] The invention therefore aims to remedy these drawbacks and to propose a configuration of a fastening assembly comprising a fixing shaft, a connecting rod and a tenon allowing to eliminate the appearance of galvanic corrosion at the interface between the connecting rod and the tenon.

[0012] A method for manufacturing a fastening assembly comprising first and second connecting portions of a connecting rod and a tenon assembled around a fastening shaft is therefore proposed, the method comprising the following steps:

[0013] - the installation of a first contact ring in the bore of the first connecting portion of the connecting rod, the first contact ring comprising an axial portion and a first radial flange extending outwards from the axial portion, the first radial flange of the first contact ring being provided with a bearing surface bearing axially against a first face of the first connecting portion of the connecting rod,

[0014] and the placement of a second contact ring in the bore of the second connecting portion of the connecting rod, the second contact ring comprising an axial portion and a first radial flange extending outwards from the axial portion, the first radial flange of the second contact ring being provided with a bearing surface coming axially to bear against a first face of the second connecting portion of the connecting rod;

[0015] - the formation of a second radial collar extending outwards the axial portion of the first contact ring by deformation of the axial portion, the second radial flange of the first contact ring being provided with a bearing surface bearing axially against a second face of the first connecting portion of the connecting rod,

[0016] and the formation of a second radial collar extending outwards the axial portion of the second contact ring by deformation of the axial portion, the second radial collar of the second contact ring being provided with a bearing surface coming axially to bear against a second face of the first connecting portion of the connecting rod;

[0017] - the axial positioning of the tenon between the first and second portions of connecting rod, and

[0018] - the installation of the tenon and the first and second connecting portions of the connecting rod around the mounting shaft, the tenon being positioned axially between the first and second connecting portions of the connecting rod,

[0019] one of the first and second radial flanges of the first contact ring being provided with a contact surface coming axially into contact with a first lateral face of the tenon or being opposite said first lateral face, and providing a first axial space between the first connecting portion of the connecting rod and the first face of the tenon and

[0020] one of the first and second radial collars of the second contact ring being provided with a contact surface coming axially into contact with a second lateral face of the tenon or being opposite said second lateral face, and providing a second axial space between the second connecting portion of the connecting rod and the second lateral face of the tenon.

[0021] In one embodiment, the outer surface of the axial portion of the first contact ring can be positioned in contact with the bore of the first connecting portion,

[0022] and the outer surface of the axial portion of the second contact ring can be positioned in contact with the bore of the second connecting portion.

[0023] Advantageously, the axial portion of the first contact ring may comprise first and second axially opposed ends, the first radial flange of the first contact ring extending outwards from the first end of the axial portion,

[0024] and the axial portion of the second contact ring comprising first and second axially opposed ends, the first radial collar of the second contact ring extending outwards from the first end of the axial portion.

[0025] Advantageously, the axial portion of the first contact ring may comprise first and second axially opposed ends, the second radial flange extending from the second end of the axial portion,

[0026] and the axial portion of the second contact ring comprising first and second axially opposed ends, the second radial collar of the second contact ring extending the second end of the axial portion.

[0027] In one embodiment, the axial portion of the first contact ring may comprise first and second axially opposed ends, the second end of the axial portion of the first contact ring being radially discontinuous, the second radial flange of the first contact ring formed by deformation of said second end having a plurality of radial lips,

[0028] and the axial portion of the second contact ring may include first and second axially opposed ends, the second end of the axial portion of the second contact ring being radially discontinuous, the second radial collar of the second contact ring formed by deformation of said second end having a plurality of radial lips.

[0029] Advantageously, the manufacturing process may include forming a chamfer on the periphery of the first radial flange of the first ring of contact, the first radial flange of the first contact ring being positioned opposite the tenon,

[0030] and the formation of a chamfer on the periphery of the first radial collar of the second contact ring, the first radial collar of the second contact ring being positioned opposite the tenon.

[0031] According to one feature, the manufacturing process may include the placement of the first and second connecting portions of the connecting rod comprising a thermoplastic or thermosetting matrix reinforced with carbon fibers.

[0032] According to one feature, the manufacturing process may include the placement of the tenon comprising a metallic material, such as aluminum or an aluminum alloy.

[0033] The invention also relates to a fastening assembly comprising a fixing shaft, a connecting rod having first and second connecting portions and a tenon, the first and second connecting portions of the connecting rod and the tenon being positioned around said fixing shaft, the tenon being disposed on the fixing shaft axially between the first and second connecting portions of the connecting rod, the articulation assembly further comprising:

[0034] - a first contact ring interposed radially between the bore of the first connecting portion of the connecting rod and the mounting shaft, the first contact ring comprising:

[0035] a first radial collar extending outwards an axial portion of the first contact ring, provided with a bearing surface bearing axially against a first face of the first connecting portion of the connecting rod, and provided with a contact surface coming axially into contact with a first lateral face of the tenon or opposite said first lateral face, and

[0036] a second radial collar extending outwards from the axial portion, and provided with a bearing surface coming axially into contact with a second face of the first connecting portion of the connecting rod,

[0037] - a second contact ring interposed radially between the bore of the second connecting portion of the connecting rod and the mounting shaft, the second contact ring comprising:

[0038] a first radial collar extending outwards an axial portion of the second contact ring, provided with a bearing surface bearing axially against a first face of the second connecting portion of the connecting rod, and provided with a contact surface coming axially into contact with a second lateral face of the tenon or opposite said second lateral face, and

[0039] a second radial collar extending outwards from the axial portion, being provided with a bearing surface coming axially into contact with a second face of the first connecting portion of the connecting rod; and

[0040] a first axial space being provided between the first connecting portion of the connecting rod and the first face of the tenon, and a second axial space being provided between the second connecting portion of the connecting rod and the second face of the tenon. Brief description of the figures

[0041] Other purposes, advantages and features will become apparent from the following description, given for illustrative purposes only and made with reference to the accompanying drawings on which:

[0042] [Fig-1] is a cross-sectional view of a fastening assembly comprising a connecting rod and a tenon according to the prior art.

[0043] [Fig.2] is a cross-sectional view of a fastening assembly comprising a connecting rod and a tenon according to an embodiment of the invention,

[0044] [Fig.3] is a cross-sectional view of a fastening assembly comprising a connecting rod and a tenon according to another embodiment of the invention.

[0045] [Fig.4] is a side view of a fastening assembly according to an embodiment of the invention.

[0046] [Fig. 5] illustrates a method for manufacturing a fastening assembly according to a method of the realization of the invention. Detailed description of the invention

[0047] Figure 2 illustrates a fastening assembly 11 according to a first embodiment of the invention. The fastening assembly comprises a connecting rod 12 and a tenon 13.

[0048] The connecting rod 12 includes at least one forked end forming a connecting rod yoke and comprising first and second connecting portions, respectively 14 and 15.

[0049] The first connecting portion 14 comprises a bore 14a, a first face 14b and a second face 14c axially opposite to the first face 14b. The thickness of the first connecting portion 14 is delimited by the first and second faces 14b and 14c.

[0050] Similarly, the second connecting portion 15 comprises a bore 15a, a first face 15b and a second face 15c axially opposite to the first face 15b. The thickness of the second connecting portion 15 is delimited by the first and second faces 15b and 15c.

[0051] The first and second connecting portions 14 and 15 of the connecting rod 12 and the tenon 13 are positioned around a common fixing shaft 16 of the assembly. The fixing shaft 16 extends along an axis X.

[0052] In addition, the tenon 13 is arranged on the fixing shaft 16 axially between the first and second connecting portions 14 and 15 of the connecting rod 12.

[0053] The tenon 13 comprises a first lateral face 13a and a second lateral face 13b axially opposed to the first lateral face 13a of the tenon 13. The first and second lateral faces 13a and 13b define the thickness of the tenon 13. The tenon 13 also comprises a bore 13c bearing against the outer surface of the fixing axis 16.

[0054] The fastening assembly 11 further includes first and second contact rings, respectively 17 and 18.

[0055] The first contact ring 17 comprises an axial portion 19 having a bore 19a, an outer surface 19b radially opposite to the bore 19a, and first and second axially opposed front faces 19c and 19d which delimit the axial length of the axial portion 19.

[0056] Similarly, the second contact ring 18 comprises an axial portion 20 having a bore 20a, an outer surface 20b radially opposite to the bore 20a, and first and second front faces 20c and 20d axially opposite and delimiting the axial length of the axial portion 20.

[0057] The first contact ring 17 is interposed radially between the bore 14a of the first connecting portion 14 of the connecting rod 12 and the fixing shaft 16.

[0058] Similarly, the second contact ring 18 is radially interposed between the bore 15a of the second connecting portion 15 of the connecting rod 12 and the fixing shaft 16.

[0059] In the illustrated example, the bore 19a of the axial portion 19 of the first contact ring 17 and the bore 20a of the axial portion 20 of the second contact ring 18 are positioned against the outer surface of the fixing shaft 16.

[0060] In the illustrated example, the outer surface 19b of the axial portion 19 of the first contact ring 17 and the outer surface 20b of the axial portion 20 of the second contact ring 18 are positioned, respectively, against the bore 14a of the first connecting portion 14 and against the bore 15a of the second connecting portion 15.

[0061] The first contact ring 17 comes axially to bear against the first lateral face 13a of the tenon 13 and the second contact ring 18 comes axially to bear against the second lateral face 13b of the tenon 13.

[0062] In addition, a first axial space 21 is provided between the first connecting portion 14 of the connecting rod 12 and the first face 13a of the tenon 13.

[0063] Similarly, a second axial space 22 is provided between the second connecting portion 15 of the connecting rod 12 and the second face 13b of the tenon 13.

[0064] The first front face 19c of the axial portion 19 of the first contact ring 17 is positioned in contact with the first lateral face 13a of the tenon 13.

[0065] In addition, the second front face 20c of the axial portion 20 of the second contact ring 18 is positioned in contact with the second lateral face 13b of the tenon 13.

[0066] Furthermore, the first contact ring 17 includes a first radial collar 23. The first radial collar 23 of the first contact ring 17 extends radially in the first axial space 21.

[0067] In the illustrated example, the first radial collar 23 extends outwards a first axial end of the axial portion 19.

[0068] The first radial collar 23 of the first contact ring 17 is, in addition, provided with a contact surface 23a in contact with the first lateral face 13a of the tenon 13, and extending radially outwards the front face 19c of the axial portion 19.

[0069] Similarly, the second contact ring 18 includes a first radial collar 24. The first radial collar 24 of the second contact ring 18 extends radially into the second radial space 22.

[0070] In the illustrated example, the first radial collar 23 extends outwards a first axial end of the axial portion 20.

[0071] The first radial collar 24 of the second contact ring 18 is provided with a contact surface 24a in contact with the second lateral face 13b of the tenon 13 and extending radially outwards the front face 20c of the axial portion 20.

[0072] In the illustrated example, the first radial flange 23 of the first contact ring 17 comprises a bearing surface 23b axially opposed to the contact surface 23a and coming axially into contact with the first face 14b of the first connecting portion 14 which is arranged opposite the first lateral face 13a of the tenon 13. The first radial flange 23 of the first contact ring 17 extends axially between the first face 14b of the first connecting portion 14 and the first lateral face 13a of the tenon 13.

[0073] Similarly, the first radial flange 24 of the second contact ring 18 comprises a bearing surface 24b axially opposed to the contact surface 24a and coming axially into contact with the first face 15b of the second connecting portion 15 which is arranged opposite the second lateral face 13b of the tenon 13. The first radial flange 24 of the second contact ring 18 extends axially between the first face 15b of the second connecting portion 15 and the second lateral face 13b of the tenon 13.

[0074] In addition, the first contact ring 17 may further include a second radial collar 25 which extends outwards the axial portion 19.

[0075] In the illustrated example, the second radial collar 25 extends a second axial end of the axial portion 19 axially opposite to the first axial end.

[0076] The second radial collar 25 of the first contact ring 17 is provided with a bearing surface 25a coming into contact with the second face 14c of the first connecting portion 14 of the connecting rod 12.

[0077] The second contact ring 18 further includes a second radial collar 26 which extends outwards the axial portion 20.

[0078] In the illustrated example, the second radial collar 26 extends a second axial end of the axial portion 20 axially opposite to the first axial end.

[0079] The second radial collar 26 of the second contact ring 18 is provided with a bearing surface 26a coming into contact with a second face 15c of the second connecting portion 15 of the connecting rod 12.

[0080] The first radial collars 23, 24 of the first and second contact rings 17 and 18 bearing against the tenon 13 maintain the first and second connecting portions 14, 15 of the connecting rod 12 at a distance from the tenon 13.

[0081] Such a configuration of the fastening assembly makes it possible to eliminate, by a simple and inexpensive means, the risks of the appearance of galvanic corrosion linked to the contacts between the connecting rod 12 and the tenon 13.

[0082] Furthermore, the presence of the first and second axial spaces 21, 22 between the first and second connecting portions 14, 15 of the connecting rod 12 and the tenon 13 eliminates the need for a smooth surface on the first faces 14b, 15b of the first and second connecting portions 14, 15. The manufacture of the fastening assembly 11 does not require a machining step of the first faces 14b and 15b of the first and second connecting portions 14, 15. As-cast first and second connecting portions 14, 15 can be used.

[0083] In the embodiment described in [Fig.2], the front face 19c and the contact surface 23a of the first contact ring 17 are arranged in contact with the first lateral face 13a of the tenon 13. Similarly, the front face 20c and the contact surface 24a of the second contact ring 18 are arranged in contact with the second lateral face 13b of the tenon 13.

[0084] In one embodiment, the front face 19c and the contact surface 23a of the first contact ring 17 can be arranged opposite the first lateral face 13a of the tenon 13, a slight play being possible between the first lateral face 13a of the tenon 13 and the first contact ring 17.

[0085] Similarly, the front face 21d, the front face 20c and the contact surface 24a of the second contact ring 18 can be arranged opposite the second lateral face 13b of the tenon 13, a slight play may be present between the second lateral face 13b of the tenon 13 and the second contact ring 18.

[0086] Advantageously, and as illustrated in [Fig.3], on which the elements identical to the embodiment illustrated in [Fig.2] bear the same references, the periphery of the first radial flange 23 of the first contact ring 17 and the periphery of the first radial flange 24 of the second contact ring 18 comprise a chamfer, respectively 27 and 28.

[0087] In one embodiment, the periphery of the second radial collar 25 of the first contact ring 17 and the periphery of the second radial collar 26 of the second contact ring 18 may also include a chamfer.

[0088] With reference to an embodiment of the fastening assembly 11 illustrated in [Fig.4], in which the elements identical to the embodiment illustrated in [Fig.2] bear the same references, the second radial collar 25 of the first contact ring 17 has a plurality of radial lips 29 spaced from each other in the circumferential direction, here in a regular manner.

[0089] Similarly, the second radial collar 26 of the second contact ring 18 has a plurality of radial lips spaced from each other in the circumferential direction, here in a regular manner.

[0090] Advantageously, the material of the tenon 13 may comprise a metal, for example aluminium or an aluminium alloy.

[0091] Advantageously, the material of the first and second connecting portions 14 and 15 of the connecting rod 12 may comprise a thermoplastic or thermosetting matrix reinforced with carbon fibers.

[0092] The carbon fiber reinforcements improving the mechanical properties of the first and second connecting portions 14 and 15 of the connecting rod 12 can be recycled, for example by pyrolysis or vapor-thermolysis, after disposal of the fastening assembly 11, for other future use.

[0093] Advantageously, the material of the first and second contact rings 17 and 18 may comprise a plastic material, a fiber-reinforced plastic material, such as glass fibers, or a metal or alloy, such as stainless steel or titanium.

[0094] Fig. 5 illustrates a method for manufacturing a fastening assembly 11 according to an embodiment of the invention, comprising first and second connecting portions 14, 15 of the connecting rod 12 and the tenon 13 assembled around the fastening shaft 16.

[0095] The manufacturing process includes a first step 100 of placing the first contact ring 17 in the bore 14a of the first portion of connection 14 of the connecting rod 12 and installation of the second contact ring 18 in the bore 15a of the second connecting portion 15 of the connecting rod 12.

[0096] At this stage, the axial portion 19 of the first contact ring 17 placed on the connecting rod 12 in step 100 has, at a first end, the first radial collar 23.

[0097] Similarly, the axial portion 20 of the second contact ring 18 placed on the connecting rod 12 in step 100 comprises, at a first end, the first radial collar 24.

[0098] The bearing surfaces 23b and 24b of the first and second contact rings 17, 18 come, respectively, axially in contact against the first face 14a of the first connecting portion 14 of the connecting rod 12 and the first face 15a of the second connecting portion 15 of the connecting rod 12.

[0099] In a second step 110, the manufacturing process includes the formation of the second radial collar 25 of the first contact ring 17 and the formation of the second radial collar 26 of the first contact ring 18.

[0100] The second radial collar 25 of the first contact ring 17 is obtained by deformation of the second end of the axial portion 19, like a riveting.

[0101] The first radial collar 23 of the first contact ring 17 can be held in contact against the first face 14b of the first connecting portion 14 of the connecting rod 12 during the deformation of the axial portion 19, crushed against the second face 14c of the first connecting portion 14 of the connecting rod 12 like a riveting, to form the second radial collar 25.

[0102] Similarly, the second radial collar 26 of the second contact ring 18 is obtained by deformation of the second end of the axial portion 20.

[0103] The first radial collar 24 of the second contact ring 18 can be held against the first face 15b of the second connecting portion 15 of the connecting rod 12 during the deformation of the axial portion 20, crushed against the second face 15c of the second connecting portion 15 of the connecting rod 12 like a riveting, to form the second radial collar 26.

[0104] The first and second contact rings 17 and 18 are thus fixed, respectively, in the bore 14a of the first connecting portion 14 of the connecting rod 12 and in the bore 15a of the second connecting portion 15 of the connecting rod 12.

[0105] This assembly of the first and second contact rings 17 and 18 does not require any additional means such as glue. Installation is simple and quick, without requiring, as would be the case for example with gluing, a preparation time for the inner surface of the connecting rod 12 and the outer surface of the fixing shaft 16, nor for setting, baking, or cleaning time.

[0106] In a third step 120, the tenon 13 is positioned axially between the first and second connecting portions 14, 15 of the connecting rod 12.

[0107] The manufacturing process then includes a fourth step 130 of setting up, of the tenon 13 and the first and second connecting portions 14, 15 of the connecting rod 12, on which the first and second contact rings 17 and 18 are fixed, around the fixing shaft 16, so that the tenon 13 is positioned axially between the first and second connecting portions 14, 15 of the connecting rod 12.

[0108] The contact surface 23a of the first radial collar 23 of the first contact ring 17 comes axially into contact with the first lateral face 13a of the tenon 13, providing the first axial space 21 between the first connecting portion 14 of the connecting rod 12 and the first face 13a of the tenon 13.

[0109] In addition, the contact surface 24a of the first radial collar 24 of the second contact ring 18 comes axially into contact with the second lateral face 13a of the tenon 13, providing the second axial space 22 between the second connecting portion 15 of the connecting rod 12 and the second lateral face 13b of the tenon 13.

[0110] The second radial collar 25 of the first contact ring 17 and the second radial collar 26 of the second contact ring 18 can be radially continuous.

[0111] Alternatively, the second radial flange 25 of the first contact ring 17 and the second radial flange 26 of the second contact ring 18 formed during the manufacturing process of the fastening assembly 11 may have a plurality of radial lips 29. In this case, the second end of the axial portion 19 of the first contact ring 17 and the second end of the axial portion 20 of the second contact ring 18 are radially discontinuous. The deformation of the second end of the radially discontinuous axial portions 19 and 20 leads to the formation of the plurality of lips 29.

[0112] Advantageously, the manufacturing process may include the formation of a chamfer 27 on the periphery of the first radial collar 23 of the first contact ring 17 positioned opposite the tenon 13 and, similarly, of a chamfer 28 on the first radial collar 24 of the second contact ring 18.

[0113] Alternatively, the manufacturing process may include, in the first step 100, the placement of a first contact ring 17 comprising the second radial flange 25 having a bearing surface 25a bearing against the second face 14c of the first connecting portion 14 of the connecting rod 12, and of a second contact ring 18 comprising the second radial flange 26 having a bearing surface 26a against the second face 15c of the second portion of connection 15 of the connecting rod 12. In the second step I 10, the first radial collar 23 of the first contact ring 17, intended to come into contact with the tenon 13, can then be obtained by deformation of the axial portion 19, and the first radial collar 24 of the second contact ring 18 can be obtained by deformation of the axial portion 20.

[0114] According to one example, the first and second connecting portions 14, 15 of the connecting rod 12 placed in step 120 around the fixing shaft 16 may comprise a thermoplastic or thermosetting matrix reinforced with carbon fibers.

[0115] According to one example, the tenon 13 placed in step 120 around the fixing shaft 16 may comprise a metallic material, such as aluminium or an aluminium alloy.

Claims

1. Demands A method for manufacturing a fastening assembly (11) comprising first and second connecting portions (14, 15) of a connecting rod and a tenon (13) assembled around a fastening shaft (16), the thickness of the tenon (13) being delimited by first and second axially opposed lateral faces (13a, 13b), the thickness of the first connecting portion (14) being delimited by first and second axially opposed faces (14b, 14c), and the thickness of the second connecting portion (15) being delimited by first and second axially opposed faces (15b, 15c), the method comprising the following steps: - the installation (100) of a first contact ring (17) in the bore (14a) of the first connecting portion (14) of the connecting rod (12), the first contact ring (17) comprising an axial portion (19) and a first radial flange (23) extending outwards from the axial portion (19), the first radial flange (23) of the first contact ring (17) being provided with a bearing surface (23b) bearing axially against the first face (14b) of the first connecting portion (14) of the connecting rod (12), and the installation (100) of a second contact ring (18) in the bore (15a) of the second connecting portion (15) of the connecting rod (12), the second contact ring (18) comprising an axial portion (20) and a first radial flange (24) extending outwards the outer axial portion (20),the first radial flange (24) of the second contact ring (18) being provided with a bearing surface (24b) bearing axially against the first face (15b) of the second connecting portion (15) of the connecting rod (12); - the formation (110) of a second radial collar (25) extending outwards the axial portion (19) of the first contact ring (17) by deformation of the axial portion (19), the second radial collar (25) of the first contact ring (17) being provided with a bearing surface (25a) coming axially to bear against the second face (14c) of the first connecting portion (14) of the connecting rod (12), and the formation (110) of a second radial collar (26) extending outwards the axial portion (20) of the second contact ring (18) by deformation of the axial portion (20), the second radial collar (26) of the second contact ring (18) being provided with a bearing surface (26a) coming axially to bear against the second face (15c) of the first connecting portion (15) of the connecting rod (12); - the axial positioning (120) of the tenon (13) between the first and second connecting portions (14, 15) of the connecting rod (12), and - the placement (130) of the tenon (13) and the first and second connecting portions (14, 15) of the connecting rod (12) around the fixing shaft (16), the tenon (13) being axially positioned between the first and second connecting portions (14, 15) of the connecting rod (12), one of the first and second radial flanges (23) of the first contact ring (17) being provided with a contact surface (23a) coming axially into contact with the first lateral face (13a) of the tenon (13) or being opposite said first lateral face (13a),and providing a first axial space (21) between the first connecting portion (14) of the connecting rod (12) and the first face (13a) of the tenon (13), and one of the first and second radial flanges (24) of the second contact ring (18) being provided with a contact surface (24a) coming axially into contact with the second lateral face (13a) of the tenon (13) or being opposite said second lateral face (13b), and providing a second axial space (22) between the second connecting portion (15) of the connecting rod (12) and the second lateral face (13b) of the tenon (13).

2. A manufacturing method according to claim 1, wherein the outer surface (19b) of the axial portion (19) of the first contact ring (17) is positioned in contact with the bore (14a) of the first connecting portion (14), and the outer surface (20b) of the axial portion (20) of the second contact ring (18) is positioned in contact with the bore (15a) of the second connecting portion (15).

3. A manufacturing method according to claim 1 or 2, wherein the axial portion (19) of the first contact ring (17) comprises first and second axially opposed ends, the first radial flange (23) of the first contact ring (17) extending outwards the first end of the axial portion (19), and the axial portion (20) of the second contact ring (18) comprising first and second axially opposed ends, the first radial collar (24) of the second contact ring (18) extending outwards the first end of the axial portion (20).

4. A manufacturing method according to any one of the preceding claims, wherein the axial portion (19) of the first contact ring (17) comprises first and second axially opposed ends, the second radial collar (25) extending from the second end of the axial portion (19), and the axial portion (20) of the second contact ring (18) comprises first and second axially opposed ends, the second radial collar (26) of the second contact ring (18) extending from the second end of the axial portion (20).

5. A manufacturing method according to any one of the preceding claims, wherein the axial portion (19) of the first contact ring (17) comprises first and second axially opposed ends, the second end of the axial portion (19) of the first contact ring (17) being radially discontinuous, the second radial flange (25) of the first contact ring (17) formed by deformation of said second end having a plurality of radial lips (29)(, and the axial portion (20) of the second contact ring (18) comprises first and second axially opposed ends, the second end of the axial portion (20) of the second contact ring (19) being radially discontinuous, the second radial flange (26) of the second contact ring (18) formed by deformation of said second end having a plurality of radial lips (29).

6. A manufacturing method according to any one of the preceding claims, comprising forming a chamfer (27) on the periphery of the first radial flange (23) of the first contact ring (17), the first radial flange (23) of the first contact ring (17) being positioned opposite the tenon (13), and the formation of a chamfer (28) on the periphery of the first radial collar (24) of the second contact ring (18), the first radial collar (24) of the second contact ring (18) being positioned opposite the tenon (13).

7. A manufacturing method according to any one of the preceding claims, comprising the installation of the first and second connecting portions (14, 15) of the connecting rod (12) comprising a thermoplastic or thermosetting matrix reinforced with carbon fibers.

8. A manufacturing method according to any one of the preceding claims, comprising the placement of the tenon (13) comprising a metallic material, such as aluminum or an aluminum alloy.

9. A fastening assembly (11) comprising a fastening shaft (16), a connecting rod (12) having first and second connecting portions (14, 15) and a tenon (13), the first and second connecting portions (14, 15) of the connecting rod (12) and the tenon (12) being positioned around said fastening shaft (16), the tenon (13) being disposed on the fastening shaft (16) axially between the first and second connecting portions (14, 15) of the connecting rod (12), the thickness of the tenon (13) being delimited by first and second axially opposed lateral faces (13a, 13b), the thickness of the first connecting portion (14) being delimited by first and second axially opposed faces (14b, 14c), and the thickness of the second connecting portion (15) being delimited by first and second faces (15b, 15c) axially opposed,the articulation assembly (11) further comprising: - a first contact ring (17) interposed radially between the bore (14a) of the first connecting portion (14) of the connecting rod (12) and the fixing shaft (16), the first contact ring (17) comprising: a first radial flange (23) extending outwards from an axial portion (19) of the first contact ring, provided with a bearing surface (23b) bearing axially against the first face (14b) of the first connecting portion (14) of the connecting rod (12), and provided with a contact surface (23a) coming axially into contact with the first lateral face (13a) of the tenon (13) or opposite said first lateral face (13a), and, a second radial collar (25) extending outwards from the axial portion (19), and provided with a bearing surface (25a) coming axially into contact with the second face (14c) of the first connecting portion (14) of the connecting rod (12), - a second contact ring (18) interposed radially between the bore (15a) of the second connecting portion (15) of the connecting rod (12) and the mounting shaft (16), the second contact ring comprising: a first radial collar (24) extending outwards an axial portion (20) of the second contact ring (18), provided with a bearing surface (24b) bearing axially against the first face (15b) of the second connecting portion (15) of the connecting rod (12), and provided with a contact surface (24a) coming axially into contact with the second lateral face (13a) of the tenon (13) or opposite said second lateral face (13b), and a second radial collar (26) extending outwards from the axial portion (20), and provided with a bearing surface (26a) coming axially into contact with the second face (15c) of the first connecting portion (15) of the connecting rod (12); and a first axial space (21) being provided between the first connecting portion (14) of the connecting rod (12) and the first face (13a) of the tenon (13), and a second axial space (22) being provided between the second connecting portion (15) of the connecting rod (12) and the second face (13b) of the tenon (13).

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