Linking set

Abstract

This connecting assembly comprises: - a connecting member (4) comprising a rod (12), a bearing and a head (14b) provided with two opposite faces crossed by a bore forming a housing for the bearing, - a female yoke comprising two arms arranged on either side of said head and each provided with a hole, and - an axis extending through the arms and the bearing, - a washer (10) provided with a body (34) arranged axially between an arm of the female yoke and one of the two opposite faces of said head (14b), at least one lug (42a, 42b) extending from the body (34) and axially beyond said face of said head, and at least one additional lug (44a) extending from the body (34) and being in contact with said face of said head (14b). Figure for abstract: Fig 2

Description

Title of the invention: Connecting assembly Technical field

[0001] The technical field of the invention is connecting members mounted on female yokes. Previous techniques

[0002] Patent FR2866683 discloses a connecting rod head with a screw passing through it for fixing it to a female yoke and a shock absorber made of elastomer material surrounding the connecting rod head to protect it from contact with the female yoke.

[0003] Such protection is suitable for moderate temperatures, for example 200°C, but is not suitable for high temperatures, in particular temperatures of the order of 500°C present near a suspension of a turbomachine turbine.

[0004] The present invention aims to protect a head of a connecting member, in particular in a high temperature environment. Statement of the invention

[0005] The invention relates to a connecting assembly, in particular for a turbomachine, comprising:

[0006] - a connecting member comprising a rod, a bearing and at least one head arranged at one of the ends of the rod and provided with two opposite faces crossed by a bore forming a housing for the bearing,

[0007] - a female yoke comprising two arms arranged on either side of said head and each equipped with a hole,

[0008] - an axis extending through the arms and the bearing,

[0009] - at least one washer provided with a body arranged axially between an arm of the female yoke and one of the two opposite faces of said head, at least one tab extending from the body and axially towards the connecting member beyond said face of said head, and at least one additional tab extending from the body and being in contact with said face of said head.

[0010] Said washer protects the connecting member from contact with the female yoke.

[0011] The body of said washer is opposite said face of said head.

[0012] Said leg of said washer limits or prevents relative movement in the direction circumferential direction of said washer relative to said head of the connecting member, thus ensuring the correct positioning of said washer. In other words, said tab of said washer cooperates with said head for the retention in the circumferential direction of said washer relative to said head.

[0013] Said additional tab of said washer in contact with said face of said head limits or prevents the rotation of the connecting member around the axis of the rod of the connecting member, thus protecting the connecting member from contact with the female yoke.

[0014] Said head is arranged axially between the arms of the female yoke.

[0015] According to a first design, the body of said washer is annular.

[0016] Alternatively, according to a second design, the body of said washer extends over a limited angular sector, in particular over a limited angular sector greater than 180 degrees.

[0017] Preferably, the bearing of the connecting member may comprise a ball joint. Alternatively, the bearing of the connecting member may be another type of bearing, such as a plain bearing.

[0018] Optionally, the connecting member is provided with a groove, the free end of said tab being inserted into the groove.

[0019] Said washer may comprise at least one pair of legs spaced circumferentially from one another, the free ends of the legs of said pair being arranged on either side of the connecting member.

[0020] Thus, said pair of legs partially surrounds the connecting member.

[0021] Said additional tab may comprise a rounded portion in contact with said face of said head of the connecting member.

[0022] Thus, said rounded portion does not damage the connecting member by being in contact with it.

[0023] Said washer may comprise at least one pair of additional legs arranged in a direction substantially orthogonal to the axis of the rod of the connecting member and diametrically opposite one another.

[0024] This design effectively limits rotation of the connecting member about the axis of the connecting member rod.

[0025] Said washer may be devoid of an additional tab on at least one angular sector arranged in the direction of the rod of the connecting member, for example on an angular sector of 90 degrees in the circumferential direction, in particular on an angular sector centered in the circumferential direction on the direction of the rod of the connecting member.

[0026] Thus, a sufficient degree of freedom of rotation of the connecting member is retained around an axis orthogonal to the plane containing the axial direction of the axis of the assembly and the direction of the axis of the rod of the connecting member.

[0027] Said tab may be circumferentially spaced from said additional tab.

[0028] Said tab may extend the large diameter edge of the annular body of said washer.

[0029] In this case, said tab can be easily produced by cutting and folding said washer.

[0030] Said additional tab may extend circumferentially over an angular sector of between 15 degrees and 25 degrees, in particular over an angular sector substantially equal to 20 degrees.

[0031] Said additional leg may extend the large diameter edge of the annular body of said washer.

[0032] Thus, said additional tab can be easily produced by cutting and folding said washer.

[0033] The free end of said additional tab may be offset radially outwards relative to the small diameter edge of the annular body of said washer.

[0034] This design makes it possible to move said additional tab away from the axis of the assembly and to act on the connecting member with a large clearance.

[0035] The free end of said additional tab may be axially spaced from the annular body of said washer.

[0036] Thus, said additional tab can deform axially in contact with the connecting member and absorb thermal expansions of the assembly.

[0037] Said washer may comprise an annular shoulder arranged on the face of the annular body opposite the connecting member.

[0038] The annular shoulder of said washer ensures sufficient rigidity of said washer and good positioning of said washer relative to said arm of the female yoke. Said arm of the female yoke may comprise a complementary recess of the annular shoulder of said washer.

[0039] Said washer may comprise a cylindrical portion axially extending the small diameter edge of the annular body of the washer and interposed between the axis and the bore of the hole of said arm.

[0040] The present invention also relates to a propulsion assembly comprising a turbomachine, a suspension pylon of the turbomachine and at least one connection assembly as defined previously connecting the turbomachine to the suspension pylon. Brief description of the drawings

[0041] Other aims, characteristics and advantages of the invention will appear on reading the following description, given solely by way of non-limiting example and made with reference to the appended drawings in which:

[0042] [Fig-1] is a schematic section of a connection assembly according to a first exemplary embodiment of the invention;

[0043] [Fig.2] is a perspective view of the lower head, lower shaft and washer of the whole [Fig.l];

[0044] [Fig.3] is a perspective view of the washer of [Fig.l];

[0045] [Fig.4] is a schematic section of a connection assembly according to a second exemplary embodiment of the invention;

[0046] [Fig.5] is a perspective view of the lower head, lower shaft and washer of the assembly of [Fig.4]; and

[0047] [Fig.6] is a schematic view of a propulsion assembly comprising a connecting assembly according to an exemplary embodiment of the invention. Detailed description

[0048] [Fig.l] represents a connecting assembly 2 comprising a connecting member 4, an upper female yoke 6a, a lower female yoke 6b, an upper pin 8a securing the connecting member 4 to the upper female yoke 6a, a lower pin 8b securing the connecting member 4 to the lower yoke 6b and a washer 10 protecting the connecting member 4 from contact with the upper and lower female yokes 6a, 6b.

[0049] Such a connecting assembly 2 is, for example, used to connect a suspension or a gearbox to an engine, in particular to an aircraft turbomachine.

[0050] The connecting member 4, for example a connecting rod, comprises a rod 12, an upper head 14a extending the rod 12 on the one hand, a lower head 14b extending the rod 12 on the other hand, an upper bearing 16a and a lower bearing 16b.

[0051] Each of the upper and lower heads 14a, 14b is flat in shape and comprises a first face 18 and a second face 20 opposite the first face 18.

[0052] The upper head 14a is traversed by a bore (not referenced) extending between the first and second faces 18, 20 of the upper head 14a. The lower head 14b is traversed by a bore (not referenced) extending between the first and second faces 18, 20 of the lower head 14b.

[0053] The upper bearing 16a is arranged in the bore of the upper head 14a. The lower bearing 16b is arranged in the bore of the lower head 14b.

[0054] Each of the upper and lower female yokes 6a, 6b comprises a first arm 22 and a second arm 24 extending substantially parallel to the first arm 22 while remaining at a distance from the first arm 22.

[0055] The first and second arms 22, 24 of the upper and lower female yokes 6a, 6b each comprise a through hole (not referenced).

[0056] The upper axis 8a extends through the first and second arms 22, 24 of the upper female yoke 6a and through the upper bearing 16a so that the rod 12 of the connecting member 4 is able to rotate around the upper axis 8a. The lower axis 8b extends through the first and second arms 22, 24 of the lower female yoke 6b and through the lower bearing 16b so that the rod 12 of the connecting member 4 is able to rotate around the lower axis 8b.

[0057] The upper head 14a is arranged axially between the first and second arms 22, 24 of the upper female yoke 6a. The lower head 14b is arranged axially between the first and second arms 22, 24 of the lower female yoke 6b. The upper shaft 8a comprises a bolt 26 extending through the first and second arms 22, 24 of the upper female yoke 6a and the upper bearing 16a, and a nut 28 locking the bolt 26 of the upper shaft 8a. The lower shaft 8b comprises a bolt 26 extending through the first and second arms 22, 24 of the lower female yoke 6b and the lower bearing 16b, and a nut 28 locking the bolt 26 of the lower shaft 8b. Alternatively other types of upper and lower axes 8a, 8b can be used.

[0058] The upper female yoke 6a is axially offset from the lower female yoke 6b, the axial direction being taken relative to the longitudinal direction of the upper and lower axes 8a, 8b.

[0059] The upper bearing 16a comprises a cage 30 crimped into the bore passing through the upper head 14a and a ball joint 32 capable of rotating in the cage 30 of the upper bearing 16a and in radial contact with the bolt 26 of the upper axis 8a, the radial direction being taken orthogonally to the axial direction. The lower bearing 16b comprises a cage 30 crimped into the bore passing through the lower head 14b and a ball joint 32 capable of rotating in the cage 30 of the lower bearing 16b and in radial contact with the bolt 26 of the lower axis 8b.

[0060] The washer 10 comprises an annular body 34, an annular shoulder 36 and a cylindrical portion 38.

[0061] The annular body 34 of the washer 10 surrounds the bolt 26 of the lower axis 8b, is arranged axially between the first arm 22 of the lower female yoke 6b and the first face 18 of the lower head 14b, and is axially in contact with the ball joint 32 of the lower bearing 16b. The annular body 34 of the washer 10 extends circumferentially over an angular sector of 360 degrees.

[0062] The annular shoulder 36 of the washer 10 is arranged on the face of the annular body 34 opposite the first arm 22 of the lower female yoke 6b, and is axially in contact with the inner face of the first arm 22 of the lower female yoke 6b.

[0063] The cylindrical portion 38 of the washer 10 axially extends the small diameter edge of the annular body 34 on the side opposite the lower head 14b, and is interposed radially between the bolt 26 of the lower axis 8b and the bore of the through hole of the first arm 22 of the lower female yoke 6b.

[0064] The connecting assembly 2 also comprises a sleeve 40b comprising a cylindrical body (not referenced) interposed radially between the bolt 26 of the lower axis 8b and the bore of the through hole of the second arm 24 of the lower female yoke 6b and a stop (not referenced) interposed axially between the ball joint 32 of the lower bearing 16b and the second arm 24 of the lower female yoke 6b.

[0065] As illustrated in Figures 2 and 3, the washer 10 comprises a first leg 42a and a second leg 42b forming a pair of legs 42a, 42b, as well as a first additional leg 44a and a second additional leg 44b forming a pair of additional legs 44a, 44b.

[0066] The first leg 42a is circumferentially spaced from the first additional leg 44a. The second leg 42b is circumferentially spaced from the first leg 42a. The second additional leg 44b is circumferentially spaced from the second leg 42b. The first additional leg 44a is circumferentially spaced from the second additional leg 44b.

[0067] Traveling around the circumference of the annular body 34 of the washer 10, the pair of legs 42a, 42b is arranged between the pair of additional legs 44a, 44b. More precisely, traveling around the circumference of the annular body 34 of the washer 10, the first leg 42a is arranged between the first additional leg 44a and the second leg 42b, the second leg 42b being arranged between the first leg 42a and the second additional leg 44b.

[0068] Each of the first and second legs 42a, 42b is folded and comprises a radial portion 46 extending radially outwards the large diameter edge of the annular body 34 of the washer 10 and an axial portion 48 axially extending the large diameter edge of the radial portion 46 in the direction of the connecting member 4, the axial portion 48 extending beyond the first face 18 of the lower head 14b, the free end of the axial portion 48 being situated axially between the first face 18 and the second face 20 of the lower head 14b.

[0069] The axial portions 48 of the first and second legs 42a, 42b of the washer 10 are arranged on either side of the connecting member 4 and cooperate by contact in the circumferential direction with the connecting member 4 for retaining the washer 10 in the circumferential direction relative to the connecting member 4.

[0070] Each of the first and second additional tabs 44a, 44b extends the large diameter edge of the annular body 34 of the washer 10 and is folded radially inwards so that the section of the additional tab 44a, 44b taken in the circumferential direction is in the shape of a portion of a circle.

[0071] Each of the first and second additional legs 44a, 44b is in axial contact with the first face 18 of the lower head 14b. More specifically, each of the first and second additional legs 44a, 44b comprises a rounded portion 50a, 50b in axial contact with the first face 18 of the lower head 14b.

[0072] The free end of each of the first and second additional legs 44a, 44b is radially spaced from the small diameter edge of the annular body 34 of the washer 10.

[0073] The free end of each of the first and second additional legs 44a, 44b is axially spaced from the annular body 34 of the washer 10.

[0074] The first additional leg 44a is symmetrical to the second additional leg 44b with respect to the direction of the lower axis 8b. The first and second additional legs 44a, 44b are arranged in the direction orthogonal to the axis of the rod 12 of the connecting member 4 included in the plane of the annular body 34 of the washer 10, the first and second additional legs 44a, 44b being diametrically opposite each other.

[0075] In other words, considering that the upper head 14a of the connecting member 4 represents, for the washer 10, a direction of 0 degrees, the first additional tab 44a is arranged in a direction of 270 degrees, the second additional tab 44b being arranged in a direction of 90 degrees, the washer 10 being without a tab in a direction of 180 degrees.

[0076] The washer 10 is, for example, formed from a metallic material.

[0077] The embodiment illustrated in Figures 4 and 5, in which the elements identical to the preceding figures bear the same references, differs mainly from the first embodiment in that the washer 10 does not include the cylindrical portion 38, in that the connecting assembly 2 comprises a sleeve 40a comprising a cylindrical body interposed between the bolt 26 of the lower axis 8b and the bore of the through hole of the first arm 22 of the lower female yoke 6b, in that the connecting member 4 comprises a groove 52, and in that the washer 10 comprises a single tab 42c and a single additional tab 44c.

[0078] The single tab 42c comprises a radial portion 46 extending radially outwards the large diameter edge of the annular body 34 of the washer 10 and an axial portion 48 axially extending the large diameter edge of the radial portion 46c.

[0079] The radial portion 46 of the single tab 42c extends substantially parallel to the rod 12 of the connecting member 4.

[0080] The groove 52 of the connecting member 4 is preferably formed in the rod 12 of the connecting member 4 and is capable of cooperating with the axial portion 48 of the single tab 42c for retaining the washer 10 in the circumferential direction relative to the connecting member 4.

[0081] The single additional tab 44c here extends circumferentially over an angular sector of 180 degrees and is radially opposite the rod 12 of the connecting member 4.

[0082] In the examples shown, each of the upper and lower bearings 16a, 16b comprises a cage 30 and a ball joint 32. Alternatively, in particular when the upper and lower female yokes 6a, 6b are located at the same axial position, other types of bearings can be used such as plain bearings.

[0083] In the examples shown, the washer 10 comprises an annular shoulder 36. Alternatively, the washer 10 may not comprise a shoulder, in particular when the annular body 34 of the washer 10 is thick, or may comprise a shoulder of another shape.

[0084] In the examples shown, the connecting assembly 2 comprises a washer 10. Alternatively, the connecting assembly 2 may comprise at least one additional washer, for example an additional washer whose annular body 34 is arranged axially between the second face 20 of the lower head 14b and the second arm 24 of the lower female yoke 6b or an additional washer whose annular body 34 is arranged axially between one of the faces 18, 20 of the upper head 14a and one of the arms 22, 24 of the upper female yoke 6a.

[0085] In the examples shown, the washer 10 comprises the same number of legs 42a, 42b, 42c and additional legs 44a, 44b, 44c. Alternatively, the washer 10 may comprise a different number of legs 42a, 42b, 42c and additional legs 44a, 44b, 44c.

[0086] In the examples shown, the washer 10 comprises one or two legs 42a, 42b, 42c. Alternatively, the washer 10 may comprise more than two legs.

[0087] In the examples shown, the washer 10 comprises one or two additional legs 44a, 44b, 44c. Alternatively, the washer 10 may comprise more than two additional legs.

[0088] In the examples shown, the body 34 of the washer 10 is annular. Alternatively, the body 34 of the washer 10 may extend over a limited angular sector, in particular over a limited angular sector greater than 180 degrees.

[0089] [Fig. 6] represents an aircraft propulsion assembly 54 comprising a turbomachine 56 provided with a nacelle 58, a suspension mast or pylon 60 of the turbomachine 56 and a connection assembly 2 connecting the turbomachine 56 to the suspension pylon 60. For example, the suspension pylon 60 is provided with the upper female yoke 6a, the turbomachine 56 being provided with the lower female yoke 6b.

[0090] Of course, the various features, variants and / or embodiments of the present invention may be combined with each other in various combinations to the extent that they are not incompatible or mutually exclusive.

Claims

Claims

1. Connecting assembly (2), in particular for a turbomachine, comprising: - a connecting member (4) comprising a rod (12), a bearing (16a, 16b) and at least one head (14a, 14b) arranged at one of the ends of the rod (12) and provided with two opposite faces (18, 20) crossed by a bore forming a housing for the bearing (16a, 16b), - a female yoke (6a, 6b) comprising two arms (22, 24) arranged on either side of said head (14a, 14b) and each provided with a hole, and - an axis (8a, 8b) extending through the arms (22, 24) and the bearing (16a, 16b), characterized in that it further comprises at least one washer (10) provided with a body (34) arranged axially between an arm (22, 24) of the female yoke (6a, 6b) and one of the two opposite faces (18, 20) of said head (14a, 14b), of at least one tab (42a, 42b, 42c) extending from the body (34) and axially in the direction of the connecting member (4) beyond said face (18, 20) of said head (14a, 14b),and at least one additional leg (44a, 44b, 44c) extending from the body (34) and being in contact with said face (18, 20) of said head (14a, 14b).,

2. A connecting assembly (2) according to claim 1, wherein the connecting member (4) is provided with a groove (52), the free end of said tab (42c) being inserted into the groove (52).

3. Connecting assembly (2) according to one of claims 1 and 2, wherein said washer (10) comprises at least one pair of tabs (42a, 42b) spaced circumferentially from each other, the free ends of the tabs (42a, 42b) of said pair being arranged on either side of the connecting member (4).

4. Connecting assembly (2) according to any one of the preceding claims, wherein said additional tab (44a, 44b, 44c) comprises a rounded portion (50a, 50b) in contact with said face (18, 20) of said head (14a, 14b) of the connecting member (4).

5. Connecting assembly (2) according to any one of the preceding claims, wherein said washer (10) comprises at least one pair of additional tabs (44a, 44b) arranged in a direction substantially orthogonal to the axis of the rod (12) of the connecting member (4) and diametrically opposite each other.

6. A connecting assembly (2) according to any preceding claim, wherein said tab (42a, 42b, 42c) is circumferentially spaced- entially of said additional leg (44a, 44b, 44c).

7. A connecting assembly (2) according to any preceding claim, wherein said tab (42a, 42b, 42c) extends the large diameter edge of the body (34) of said washer (10).

8. A connecting assembly (2) according to any preceding claim, wherein said additional tab (44a, 44b, 44c) extends the large diameter edge of the body (34) of said washer (10).

9. Connecting assembly (2) according to any one of the preceding claims, wherein said washer (10) comprises a cylindrical portion (38) axially extending the small diameter edge of the body (34) of the washer (10) and interposed between the axis (8a, 8b) and the bore of the hole of said arm (22, 24).

10. Propulsion assembly (54) comprising a turbomachine (56), a suspension pylon (60) of the turbomachine (56) and at least one connecting assembly (2) according to any one of the preceding claims connecting the turbomachine to the suspension pylon.

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