Method of manufacturing a fixing 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: - placing (100) 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 collar (23, 24) extending outwards an axial portion (19, 20) and being provided with a bearing surface (23b, 24b) against the connecting rod (12), - forming (110) a second radial collar (25, 26) extending outwards the axial portion (19, 20) by deforming the axial portion (19, 20), - placing (120) 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 collars (23, 24) being provided with a contact surface (23a,24a) coming axially into contact with the tenon (13) or opposite the tenon, providing an axial space between the connecting rod (12) and the tenon (13). Figure 2,

Description

Title of the invention: Method of manufacturing a fixing 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 to a fixing shaft.

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

[0003] An existing fixing assembly 1, as shown in [Fig.l], comprises a yoke of a connecting rod 2 provided with two connecting portions 3 and 4, as well as 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 from a carbon fiber reinforced plastic material and the tenon formed from metal such as aluminum.

[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 the 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 plastic material reinforced with glass fibers, generally in the form of a fold, on the surface of the connection 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 fixing assembly 1.

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

[0010] Furthermore, the presence of glass fibers in the 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 the fixing assembly 1 has been scrapped. Summary of the invention

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

[0012] There is therefore proposed a method of manufacturing a fixing assembly comprising first and second connecting portions of a connecting rod and a tenon assembled around a fixing shaft, 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 collar extending the axial portion outwards, the first radial collar of the first contact ring being provided with a bearing surface axially bearing against a first face of the first connecting portion of the connecting rod,

[0014] and the installation 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 collar extending the axial portion outwards, the first radial collar of the second contact ring being provided with a bearing surface axially bearing 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 collar of the first contact ring being provided with a bearing surface axially bearing 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 into abutment against a second face of the first connecting portion of the connecting rod;

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

[0018] - the installation of the tenon and the first and second connecting portions of the connecting rod around the fixing 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 collars 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 may 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 opposite ends, the first radial collar of the first contact ring extending outwards the first end of the axial portion,

[0024] and the axial portion of the second contact ring comprising first and second axially opposite ends, the first radial flange of the second contact ring extending outwardly the first end of the axial portion.

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

[0026] and the axial portion of the second contact ring comprising first and second axially opposite ends, the second radial flange 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 axially opposite first and second 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 comprise first and second axially opposite ends, the second end of the axial portion of the second contact ring being able to be radially discontinuous, the second radial flange of the second contact ring formed by deformation of said second end having a plurality of radial lips.

[0029] Advantageously, the manufacturing method may comprise forming a chamfer on the periphery of the first radial flange of the first contact ring, 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 characteristic, the manufacturing method may comprise the installation 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 method may comprise placing the tenon comprising a metallic material, such as aluminum or an aluminum alloy.

[0033] The invention also relates to a fixing assembly comprising a fixing shaft, a connecting rod provided with 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 arranged 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 fixing 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 axially bearing against a first face of the first connecting portion of the connecting rod, and provided with a contact surface axially coming into contact with a first lateral face of the tenon or opposite said first lateral face, and

[0036] a second radial collar extending the axial portion outwards, 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 fixing 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 axially bearing against a first face of the second connecting portion of the connecting rod, and provided with a contact surface axially coming into contact with a second lateral face of the tenon or opposite said second lateral face, and

[0039] a second radial collar extending outwards 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 aims, advantages and characteristics will emerge from the description which follows, given purely for illustrative purposes and with reference to the appended drawings in which:

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

[0043] [Fig.2] is a sectional view of a fixing assembly comprising a connecting rod and a tenon according to one embodiment of the invention,

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

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

[0046] [Fig.5]] illustrates a method of manufacturing a fixing assembly according to a mode of carrying out the invention. Detailed description of the invention

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

[0048] The connecting rod 12 comprises 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 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 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 opposite the first lateral face 13a of the tenon 13. The first and second lateral faces 13a and 13b delimit 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 fixing assembly 11 further comprises 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 the bore 19a, and first and second axially opposite 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 the bore 20a, and first and second axially opposite front faces 20c and 20d 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 interposed radially between the bore 15a of the second connecting portion 15 of the connecting rod 12 and the fixing shaft 16.

[0059] In the example illustrated, 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 axis 16.

[0060] In the example illustrated, 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 connection portion 14 and against the bore 15a of the second connection portion 15.

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

[0062] Furthermore, 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] Furthermore, 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] In addition, the first contact ring 17 comprises 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 example illustrated, 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 comprises a first radial flange 24. The first radial flange 24 of the second contact ring 18 extends radially into the second radial space 22.

[0070] In the example illustrated, 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 example illustrated, the first radial collar 23 of the first contact ring 17 comprises a bearing surface 23b axially opposite the contact surface 23a and coming axially into contact with the first face 14b of the first connection portion 14 which is arranged opposite the first lateral face 13a of the tenon 13. The first radial collar 23 of the first contact ring 17 extends axially between the first face 14b of the first connection portion 14 and the first lateral face 13a of the tenon 13.

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

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

[0075] In the example illustrated, the second radial collar 25 extends a second axial end of the axial portion 19 axially opposite 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 connecting rod 12.

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

[0078] In the example illustrated, the second radial collar 26 extends a second axial end of the axial portion 20 axially opposite 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 connection 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 hold the first and second connection portions 14, 15 of the connecting rod 12 at a distance from the tenon 13.

[0081] Such a configuration of the fixing 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] In addition, 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 to have a smooth surface on the first face 14b, 15b of the first and second connecting portions 14, 15. The manufacture of the fixing assembly 11 does not require a step of re-machining the first faces 14b and 15b of the first and second connecting portions 14, 15. First and second connecting portions 14, 15 as molded 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 an alternative embodiment, the front face 19c and the contact surface 23a of the first contact ring 17 may be arranged opposite the first lateral face 13a of the tenon 13, a slight clearance possibly being present 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 may be arranged opposite the second lateral face 13b of the tenon 13, a slight clearance possibly being 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], in which the elements identical to the embodiment illustrated in [Fig.2] bear the same references, the periphery of the first radial collar 23 of the first contact ring 17 and the periphery of the first radial collar 24 of the second contact ring 18 comprise a chamfer, respectively 27 and 28.

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

[0088] With reference to an embodiment of the fixing 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 apart 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 one another in the circumferential direction, here in a regular manner.

[0090] Advantageously, the material of the tenon 13 may comprise a metal, for example aluminum or an aluminum 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 scrapping the fixing 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 an alloy, such as stainless steel or titanium.

[0094] [Fig.5] illustrates a method of manufacturing a fixing 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 fixing shaft 16.

[0095] The manufacturing method comprises a first step 100 of placing the first contact ring 17 in the bore 14a of the first connection portion 14 of the connecting rod 12 and of placing the second contact ring 18 in the bore 15a of the second connection 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 comprises, at a first end, the first radial collar 23.

[0097] Similarly, the axial portion 20 of the second contact ring 18 put in place on the connecting rod 12 at 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 into abutment 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 method comprises 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, such as riveting.

[0101] The first radial collar 23 of the first contact ring 17 can be held in abutment 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 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 in abutment 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 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 connection portion 14 of the connecting rod 12 and in the bore 15a of the second connection portion 15 of the connecting rod 12.

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

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

[0107] The manufacturing method then comprises a fourth step 130 of positioning 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 connection 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 connection 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 may 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 fixing 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 production of the plurality of lips 29.

[0112] Advantageously, the manufacturing method may comprise 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 method may comprise the installation, in the first step 100, of a first contact ring 17 comprising the second radial collar 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 collar 26 having a bearing surface 26a against the second face 15c of the second connecting portion 15 of the connecting rod 12. In the second step 110, the first radial collar 23 of the first contact ring 17, intended to come into contact with the tenon 13, may then be obtained by deformation of the axial portion 19, and the first radial collar 24 of the second contact ring 18 may 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 put in place in step 120 around the fixing shaft 16 may comprise a thermoplastic or thermosetting matrix reinforced with fibers. carbon.

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

Claims

Claims

1. A method of manufacturing a fixing assembly (11) comprising first and second connecting portions (14, 15) of a connecting rod and a tenon (13) assembled around a fixing shaft (16), the method comprising the following steps: - the placement (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 collar (23) extending outwards the axial portion (19), the first radial collar (23) of the first contact ring (17) being provided with a bearing surface (23b) axially bearing against a first face (14b) of the first connecting portion (14) of the connecting rod (12), and the placement (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 collar (24) extending outwards outwards the axial portion (20),the first radial collar (24) of the second contact ring (18) being provided with a bearing surface (24b) axially bearing against a first face (15b) of the second connection 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) axially bearing against a 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) axially bearing against a second face (15c) of the first connecting portion (15) of the connecting rod (12);- positioning (120) the tenon (13) axially between the first and second connecting portions (14, 15) of the connecting rod (12), and - placing (130) the tenon (13) and the first and second connecting portions (14, 15) of the connecting rod (12) around the shaft of; fixing (16), the tenon (13) being positioned axially 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 a 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 a 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 opposite ends, the first radial flange (23) of the first contact ring (17) extending outwardly the first end of the axial portion (19), and the axial portion (20) of the second contact ring (18) comprises first and second axially opposite ends, the first radial flange (24) of the second contact ring (18) extending outwardly 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 opposite ends, the second radial collar (25) extending the second end of the axial portion (19), and the axial portion (20) of the second contact ring (18) comprising first and second axially opposite ends, the second radial collar (26) of the second contact ring (18) extending 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 opposite 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 opposite 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 forming a chamfer (28) on the periphery of the first radial flange (24) of the second contact ring (18), the first radial flange (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 placing 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 preceding claim, comprising providing the tenon (13) comprising a metallic material, such as aluminum or an aluminum alloy.

9. Fastening assembly (11) comprising a fastening shaft (16), a connecting rod (12) provided with 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 fixing shaft (16), the tenon (13) being arranged on the fixing shaft (16) axially between the first and second connecting portions (14, 15) of the connecting rod (12), 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 collar (23) extending outwards an axial portion (19) of the first contact ring, provided with a bearing surface (23b) coming axially into contact with a 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 a first lateral face (13a) of the tenon (13) or opposite said first lateral face (13a), and a second radial collar (25) extending the axial portion (19) outwards, and provided with a bearing surface (25a) coming axially into contact with a 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 fixing 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) coming axially into contact with a 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 a second lateral face (13a) of the tenon (13) or opposite said second lateral face (13b), and a second radial collar (26) extending the axial portion (20) outwards, and provided with a bearing surface (26a) coming axially into contact with a 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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