Assembly comprising a part and a bearing ring assembled on the part, and method for producing such an assembly

Abstract

The invention relates to an assembly comprising: - a first relief (154) formed in a side wall of the ring (102) and comprising a first inclined face (162b), - a second relief (156) formed in a side wall of the part (34) and comprising a second inclined face (163a), and - an annular bore (155) that extends completely around an axis of revolution of the ring and opens out: -- in a front plane (110) so as to form an annular opening (160) which extends continuously over 360° around the axis of revolution and through which a curable material can be injected into a cavity at any location around the axis of revolution, and -- in a rear plane (108), into the cavity in order to fluidically connect it to the annular opening (160).

Description

[0001] Assembly comprising a part and a bearing ring assembled onto that part

[0002] [1] The invention relates to an assembly comprising a part and a bearing ring assembled onto that part. The invention also relates to a human-machine interface comprising this assembly and a method for manufacturing this assembly.

[0003] [2] Bearings are used whenever it is necessary to limit friction between a shaft, which rotates around an axis of revolution, and a fixed support. For example, roller bearings typically consist of an inner ring and an outer ring between which bearings such as balls are interposed. When the bearings are balls, such a bearing is known as a "ball bearing." Generally, the outer ring is fixed to the support and the inner ring is fixed to the shaft. In this case, the assembly of a bearing ring on a part refers to either the assembly of the outer ring on the support or the assembly of the inner ring on the shaft.

[0004] [3] Numerous methods of assembling a bearing ring onto a component have already been proposed. For example, for certain applications, it has already been suggested to fix the outer ring to the support by press fitting. In this case, the outer ring is subjected to significant mechanical stresses that can damage it and thus impair the bearing's performance.

[0005] [4] It is also known to lock the inner ring against the shaft using a circlip. In this case, the inner ring is not subjected to significant mechanical stresses. However, the assembly is bulkier because it includes a circlip located before and / or after the bearing along the axis of revolution. Furthermore, in this case, there is axial play.

[0006] [5] It has also been proposed to glue the inner ring to the shaft. In this case, a gap is provided between the inner ring and the shaft to receive the glue. Because of this gap, the positioning of the inner ring on the shaft is imprecise. [6] To remedy this latter drawback, application FR2612268A1 proposes to cut a circular groove in the shaft to receive the glue that secures the inner ring to the shaft by adhesion. Application FR2612268A1 also proposes to create a passage in the shaft containing the groove to inject the glue into this groove while the shaft and the ring are already assembled together. The ring assembly described in application FR2612268A1 is advantageous because it does not exert significant mechanical stresses on the ring, it is compact, and it allows for precise centering of the inner ring on the shaft.However, the coefficients of thermal expansion of the inner ring and the shaft are usually different from the coefficient of thermal expansion of the adhesive. Therefore, when this assembly is subjected to repeated temperature variations, the adhesive eventually loses its proper bond to either the inner ring or the shaft. Consequently, the inner ring is no longer held in place against the shaft. Thus, adhesive-based assemblies are not sufficiently robust over time and are therefore unsuitable for applications requiring high levels of operational reliability.

[0007] [7] US patent application 20170114833A1 describes a method for attaching an outer ring of a bearing to a part. A receptacle for the ring is formed in the part, and then plastic is molded between the outer periphery of the ring and the inner periphery of the receptacle. Once hardened, the molded plastic forms an overmolded part that holds the outer ring in the receptacle. External molds are required to obtain this overmolded part. These external molds ensure that, during plastic injection, the outer ring is correctly centered within the receptacle and that the injected plastic is confined between the outer ring and the receptacle. Therefore, assembling the outer ring onto the part requires the use of external equipment, in this case, external molds for the overmolding. The manufacturing of this assembly is thus complex.

[0008] [8] Application FR1496944A discloses an assembly of an outer ring of a bearing in a part. The part has a receptacle into which the outer ring is received. A bushing is used to properly center the outer ring in this receptacle. In addition, opposing grooves are formed, on one side in the bushing and, on the other side, in the part. Thus, these grooves define a cavity. To fill this cavity with epoxy resin, a through channel is machined in the part. This through channel opens, on one side, to the outside and, on the opposite side, into the cavity. During the manufacture of this assembly, it may happen that the epoxy resin does not flow properly into the cavity, so that there are areas of the cavity not filled with epoxy resin. These areas form zones of weakness that can cause premature failure of the assembly.However, in the case of the assembly described in application FR1496944A, it is not easy to verify that the epoxy resin has correctly spread throughout the cavity. Therefore, this assembly is not suitable for applications requiring a high level of operational reliability.

[0009] [9] The invention aims to remedy this drawback by proposing an assembly comprising a part and a bearing ring assembled on this part, this assembly being able to be implemented without exerting significant mechanical stresses on the ring, being compact, without radial play and sufficiently robust to be suitable for applications with a high level of operational reliability.

[0010]

[0010] The invention is set forth in the attached set of claims.

[0011]

[0011] The invention will be better understood upon reading the following description, given solely by way of non-limiting example and made with reference to the drawings in which:

[0012] - Figure 1 is a schematic, perspective illustration of a human-machine interface,

[0013] - Figure 2 is an exploded view of a measurement module for the interface of Figure 1, - Figure 3 is a vertical cross-sectional illustration of details of the measurement module of Figure 2.

[0014] - Figure 4 is a partial, perspective, vertical cross-sectional view of an assembly of an outer ring of a bearing,

[0015] - Figure 5 is a schematic, partial, vertical cross-section illustration of the assembly shown in Figure 4.

[0016] - Figure 6 is a partial, vertical cross-sectional view of an assembly of an inner ring of a bearing,

[0017] - Figure 7 is an exploded view of elements of the assembly shown in Figure 6,

[0018] - Figure 8 is a schematic, partial, vertical cross-section illustration of the assembly shown in Figure 6.

[0019] - Figure 9 is a perspective view of a rotating assembly mounted on a support; - Figure 10 is a flowchart of a manufacturing process for the assemblies shown in Figures 4 and 6.

[0020] - Figures 11 to 15 are partial schematic illustrations, in vertical section, of different other possible embodiments of the assembly of Figure 4 or 6, - Figure 16 is a partial schematic illustration, in top view, of another possible embodiment of the assembly of Figure 4 or 6.

[0021]

[0012] In this description, the terminology, conventions, and definitions of the terms used in this text are introduced in Chapter I. Detailed examples of embodiments are then described in Chapter II with reference to the figures. In Chapter III, variations of these embodiments are presented. Finally, the advantages of the different embodiments are specified in Chapter IV.

[0022]

[0013] Chapter I: Definitions, terminologies and conventions:

[0023]

[0014] In the figures, unless otherwise indicated, the same references are used to designate the same elements.

[0024]

[0015] In the remainder of this description, the well-known characteristics and functions of a person skilled in the art are not described in detail.

[0025]

[0016] The figures are oriented with respect to an orthogonal XYZ coordinate system, where the X and Y directions are horizontal and the Z direction is vertical. Terms such as "above," "below," "top," "bottom," "superior," and "inferior" are defined with respect to the Z direction. The terms "front" and "back" are defined with respect to the X direction.

[0026]

[0017] The expression "an element made of a material A" or the expression "an element made of material A" means that material A represents 90% or 95% of the mass of that element.

[0027]

[0018] In this text, the hardnesses of the materials are expressed, at 25°C, on a Shore scale.

[0028]

[0019] In this text, viscosity is typically measured at 25°C using a rotary viscometer. A rotary viscometer generally comprises a rotor, such as a cylinder or a disc, which rotates in the liquid at a constant speed. The resistance force generated by the liquid on the rotor is measured and converted into viscosity. Viscosity is expressed in millipascal-seconds (mPa·s) or centipoise (cP). One millipascal-second is equal to one centipoise.

[0029]

[0020] The plane perpendicular to the axis of revolution of a bearing ring and closest to a bearing surface on which the ring rests is called the "back plane". The ring wall that rests directly on this bearing surface is called the "back wall".

[0030]

[0021] In this text, when an element is located between two planes, this means that the element is located between these two planes and away from each of these two planes. By "away from", we mean that the element is mechanically separated from each plane by a distance of at least 0.5 mm or at least 1 mm.

[0031]

[0022] Chapter: Examples of embodiments

[0032]

[0033]

[0023] Figure 1 represents a human-machine interface 2 for piloting an aircraft. The interface 2 includes a tool 4 and measures the angular position of this tool 4 relative to a reference position. The tool 4 is intended to be manipulated with the thumb to make adjustments or selections. In this case, the interface 2 is known as a thumbwheel.

[0034]

[0024] The utensil 4 is mounted to rotate only about a single horizontal axis 6 of revolution. In the figures, the axis 6 is parallel to the X direction. The utensil 4 can be directly operated by hand by a user. To this end, in this embodiment, the utensil 4 is a semi-circular part whose axis of revolution coincides with the axis 6.

[0035]

[0025] The utensil 4 is movable in rotation around the axis 6 between a neutral position, represented in Figure 1, and positions inclined to the right and / or to the left.

[0036]

[0026] In this embodiment, the utensil 4 is housed in a fixed cover 10. For example, this cover 10 has stops which limit the angular movement of the utensil 4 around the axis 6.

[0037]

[0027] The utensil 4 is fixed, without any degree of freedom, on a rotating assembly 38 (Fig. 2).

[0038]

[0028] The interface 2 also includes a printed circuit board 32 (Fig. 2, 3), a support 34 (Fig. 2, 3), a bearing 36 (Fig. 2, 3), the rotating assembly 38 (Fig. 2, 3) and an angular sensor 40 (Fig. 3).

[0029] The support 34 is stationary, rotating on the axis 6. The printed circuit board 32 is fixed, without any degree of freedom, inside a receptacle 70 (Fig. 2, 3) provided in a rear face of this support 34.

[0039]

[0030] The support 34 comprises a ring 76 (Fig. 3). The ring 76 comprises an inner wall 78 of revolution turned towards the axis 6 and, on the opposite side, an outer cylindrical face 80. The wall 78 is without threads.

[0040]

[0031] In this text, the direction curves of all the cylindrical faces are circles centered on the axis 6 and the generatrices of these cylindrical faces are parallel to the axis 6.

[0041]

[0032] The wall 78 forms, in combination with a front face 82 of the support 34, a receptacle 84 in which the bearing 36 is received.

[0042]

[0033] The front face 82 has an annular bearing surface 88 (Fig. 3, 4) for an outer ring of the bearing 36. This bearing surface 88 extends in a vertical plane. This bearing surface 88 prevents the bearing 36 from moving in a direction F (Fig. 3) parallel to the direction X but in the opposite direction.

[0043]

[0034] The bearing 36 forms a pivot joint that allows the rotating assembly 38 to rotate about the axis 6. In this embodiment, the bearing 36 is a roller bearing, and more specifically, a ball bearing. The bearing 36 comprises an outer ring 102 (Fig. 3) and an inner ring 104 (Fig. 3) that can rotate freely relative to each other. These rings 102 and 104 are centered on the axis 6.

[0044]

[0035] The ring 102 comprises an annular front wall 105a (Fig. 5), an annular rear wall 105b (Fig. 5), and a side wall 106 (Fig. 4, 5) centered on the axis 6. Typically, the walls 105a and 105b are each contained in their respective vertical planes. Only the wall 105b rests directly on the bearing surface 88.

[0045]

[0036] Wall 106 connects walls 105a and 105b. Wall 106 is opposite wall 78 only between two vertical planes 108 and 110 (Fig. 4, 5). Planes 108 and 110 are perpendicular to axis 6. Plane 108 is a rear plane in the case of the assembly shown in Figure 5.

[0046]

[0037] The wall 106 has a cylindrical centering face 111a (Fig. 5) directly bearing against a cylindrical centering face 111b (Fig. 5) of the wall 78. The gap, denoted J in this text, between the faces 111a and 111b is chosen to be sufficiently small to precisely center the ring 102 inside the receptacle 84. Advantageously, the gap J is also chosen to be sufficiently small to prevent the curable material, described later, from escaping through this gap J during its injection. This gap J is also chosen to be sufficiently large to allow the ring 102 to be inserted into the receptacle 84 by hand or with the aid of a press. Typically, this gap J is less than 0.1 mm and, preferably, less than 0.02 mm or 0.01 mm, or even a negative gap corresponding to an interference fit. Here, the support 34 is made of plastic while the ring 102 is made of ceramic. Under these conditions, the clearance J is less than 0 mm and is typically between 0 mm and -0.05 mm.

[0047]

[0038] The ring 104 also includes a front wall 112a (Fig. 6), a rear wall 112b (Fig. 6), and a side wall 114 (Fig. 4, 6) facing the axis 6. Similar to what was described for the ring 102, the walls 112a and 112b are each contained in their respective vertical planes. Only the wall 112b rests on a support 122. The wall 114 connects the walls 112a and 112b.

[0048]

[0039] The rotating assembly 38 is fixed to the inner ring 104. For this purpose, the assembly 38 comprises a tubular shaft 120 (Fig. 2, 3) which is received inside the ring 104 and the annular bearing surface 122 (Fig. 3, 6) which bears directly only on the wall 112b. The bearing surface 122 extends in a vertical plane perpendicular to the axis 6.

[0049]

[0040] The shaft 120 has a lateral wall 124 (Figs. 2, 3 and 6) opposite the wall 114 of the ring 104 only between the plane 108 and a vertical rear plane 126 (Fig. 6). The plane 126 is parallel to the plane 108 and contains the bearing surface 122.

[0050]

[0041] The wall 114 has a cylindrical centering face 128a (Fig. 4, 6) directly bearing against a cylindrical centering face 128b (Fig. 6) of the wall 124. The clearance J2 between the faces 128a and 128b is chosen as described for the clearance J. In this embodiment, the ring 104 is made of ceramic and the rotating assembly 38 is made of aluminum. Thus, in this case, the clearance J2 is chosen to be greater than 0 mm and less than 0.02 mm.

[0051]

[0042] The assembly 38 is driven in rotation on the axis 6 by the utensil 4. For example, the assembly 38 has two tapped holes 130, 132 (Fig. 2) for attaching the utensil 4 to this assembly 38.

[0052]

[0043] The angular sensor 40 generates an electrical signal representative of the angular position of the tool 4. To do this, the sensor 40 measures the angular position of the assembly 38. The sensor 40 comprises a rotating part 140 (Fig. 2, 3) and a stationary part 142 (Fig. 3).

[0044] The rotating part 140 is fixed, without any degrees of freedom, to the assembly 38. Here, the part 140 is fixed inside the shaft 120. For this purpose, a hardenable material is poured inside the shaft 120. Once hardened, this hardenable material forms a hard block 144 (Fig. 6) which immobilizes the part 140 inside the shaft 120 and which fixes, without any degrees of freedom, the shaft 120 onto the ring 104.

[0053]

[0045] In this embodiment, the part 140 is centered on the axis 6 and includes lugs 146, 147 (Fig. 2) which, by cooperation of form with corresponding hollows arranged inside the shaft 120, allow a single angular position of the part 140 inside the shaft 120.

[0054]

[0046] Here, part 140 is passive, that is, it is not powered by an energy source. In this embodiment, part 140 includes a permanent magnet. For example, the direction of magnetization of this magnet lies in a vertical plane.

[0055]

[0047] Part 142 includes a transducer sensitive to the angular position of the permanent magnet in part 140. Here, the transducer comprises a tunnel magnetoresistive element housed in a casing soldered onto the printed circuit board 32 (Fig. 2, 3). The resistance value of the magnetoresistive element varies according to the orientation of the permanent magnet relative to this magnetoresistive element. This transducer, and more specifically its casing, is centered on axis 6 and positioned opposite the permanent magnet.

[0056]

[0048] Here, the printed circuit board 32 which includes other electronic components to process the measurement of the sensor 40. The printed circuit board 32 is connected to an electronic control unit.

[0057]

[0049] The interface 2 comprises an assembly 150 (Fig. 4, 5) of the ring 102 of the bearing 36 on a part. In the case of the assembly 150, the part is the support 34. The assembly 150 prevents the ring 102 from translating in the X direction inside the receptacle 84. For this purpose, the assembly 150 comprises, in addition to the support 34 and the ring 102:

[0058] - a relief 154 (Fig. 4, 5) carved into the wall 106 of the ring 102,

[0059] - a relief 156 (Fig. 4, 5) carved into the wall 78 of the crown 76 of the support 34, - a passage 158 (Fig. 4, 5) carved into the crown 76 which seamlessly connects the reliefs 154, 156 to an external opening 160 (Fig. 4, 5), and

[0060] - a block 161 of hardenable material interposed between the reliefs 154, 156.

[0050] The reliefs 154, 156 are shaped to block the ring 102 in translation inside the support 34 by cooperation of form with the block 161. These reliefs 154, 156 are entirely located between the planes 108 and 110. Here, the reliefs 154, 156 both extend continuously over 360° around the axis 6 and their cross-section is constant over the entire circumference of the axis 6. The reliefs 154, 156 are opposite each other.

[0061]

[0051] In the case of assembly 150, each relief 154, 156 has two inclined faces, respectively, 162a, 162b and 163a, 163b (Fig. 5). In this text, an inclined face refers to a face inclined with respect to axis 6. Thus, this inclined face does not extend in a plane parallel to axis 6. Here, each of the faces 162a, 162b, 163a, 163b extends in a plane perpendicular to axis 6. Faces 162a and 163a are oriented towards plane 108, while faces 162b and 163b are oriented towards plane 110. Faces 162a and 163a are closer to plane 110 than faces 162b and 163b. The faces 162b and 163b are separated from the rear plane 108 by the centering faces 111a, 111b. The faces 162a and 162b are arranged relative to the faces 163a, 163b so as to define a cavity which, on the side of the plane 108, is at least partially delimited by the faces 162b and 163b and which, on the side of the plane 110, is at least partially delimited by the faces 162a and 163a.

[0062]

[0052] In this first embodiment, the reliefs 154 and 156 are each formed solely of a single groove centered on the axis 6. Thus, thereafter, the same numerical reference is used to designate the relief and its groove.

[0063]

[0053] The grooves 154 and 156 are located opposite each other. The cross-section of these grooves is rectangular. The faces 162a and 162b correspond to the front and rear faces of the groove 154. The faces 163a and 163b correspond to the front and rear faces of the groove 156. Furthermore, in this embodiment, the faces 162b and 163b are in the same plane perpendicular to the axis 6, and the faces 162a and 163a are also in the same plane perpendicular to the axis 6. Under these conditions, the cavity delimited by the grooves 154 and 156 is a ring centered on the axis 6, which makes a complete circumference around the axis 6 and whose cross-section is rectangular. This cavity extends both inside the support 34 and the ring 102.

[0064]

[0054] The widths and depths of the grooves 154 and 156 are adapted to obtain good shear strength and to allow the implementation of the manufacturing process shown in Figure 10. Typically, the width of these grooves, i.e., the distance between faces 162a and 162b and between faces 163a and 163b, is greater than 0.5 mm and, preferably, greater than 1 mm or 2 mm. Here, the widths of the two grooves are equal. The depth of these grooves is typically greater than 0.1 mm, 0.3 mm, or 0.5 mm. Generally, the depth of the grooves is less than 5 mm or 2 mm. Here, as shown in figures 4 and 5, the depth of the groove cut into the wall 78 is greater than the depth of the groove cut into the wall 106 because the thickness of the crown 76 is generally greater than the thickness of the ring 102.

[0065]

[0055] The passage 158 is shaped to allow, after the assembly of the ring 102 inside the receptacle 84, the injection of a hardenable material through the opening 160 to fill the cavity delimited by the grooves 154, 156.

[0066]

[0056] Here, the passage 158 comprises only an annular bore 155 (Fig. 5) which makes a complete circumference around the axis 6. The cross-section of the bore 155 is constant around the entire circumference of the axis 6. The bore 155 opens into the plane 110 to form the opening 160. On the opposite side, the bore 155 opens into the cavity delimited by the grooves 154, 156. More precisely, here, the bore 155 opens into the groove 156. Thus, the bore 155 fluidly connects the opening 160 to this cavity. In this example, the bore 155 is only machined into the face 78 of the ring 76. Moreover, here, the bore 155 has an annular chamfer 166 (Fig. 5) formed in the ring 76 and located at the intersection between the wall 78 and the plane 110. This chamfer 166 is centered on the axis 6 and makes a complete circumference of the axis 6. Thanks to this chamfer 166, the cross-section of the bore 155 gradually flares out up to the opening 160 in the X direction.This allows the 160 opening to be widened, thus facilitating the injection of the curable material. Typically, the width of the 160 opening is greater than 0.5 mm or 1 mm.

[0067]

[0057] In this embodiment, the opening 160 is an annular opening centered on the axis 6 and which makes a complete turn around the axis 6. Here, the opening 160 and the passage 158 are shaped to allow the injection of the curable material, for example, using a syringe.

[0068]

[0058] The block 161 is made of a hardenable material that is initially in a paste-like state and then hardens to a solid state. In the paste-like state, this material can be injected, via the opening 160 and the passage 158, to completely fill the grooves 154, 156. In the solid state, this material forms a lock 170 (Fig. 5) that prevents translational movement of the ring 102 inside the support 34 in both the X and F directions, regardless of its adhesion strength to the ring 102 and the crown 76. Since this lock 170 is made of a hardenable material, the lock 170 is referred to as the "hardenable lock" in this text.

[0069]

[0059] In its solid state, the hardness of the curable material is between 60 and 100 on the Shore D scale and, preferably, between 75 and 100 or between 80 and 100 on the Shore D scale. By comparison, the hardness of a standard adhesive once dry varies between 20 and 80 on the Shore A scale depending on its composition and application, which corresponds to a hardness of less than 35 on the Shore D scale. Thus, in its solid state, the curable material used here is much harder than a standard adhesive.

[0070]

[0060] In the solid state, preferably, the shear modulus of the hardenable material is greater than 0.025 GPa or 0.07 GPa and, advantageously, greater than 0.2 GPa or 0.5 GPa or 1 GPa.

[0071]

[0061] In its paste-like state, the viscosity of the curable material is often greater than 10 Pa.s, 20 Pa.s, or even 30 Pa.s. By comparison, the viscosity of a standard adhesive is often between 2 Pa.s and 6 Pa.s. Thus, the curable material used here is generally more viscous than a standard adhesive, which prevents the curable material from leaking out of the grooves 154, 156 and the passage 158.

[0072]

[0062] Preferably, the viscosity of the curable material is also less than 500 Pa.s or 100 Pa.s to facilitate the injection of this curable material into the passage 158 and the grooves 154, 156.

[0073]

[0063] Here, by way of illustration, the curable material is epoxy resin. After polymerization:

[0074] - the hardness of this epoxy resin is between 80 and 85 on the Shore D scale, - its shear modulus is generally between 1 GPa and 2 GPa, and - its adhesion to cylindrical faces, measured according to the shear test, is generally between 15 MPa and 35 MPa before aging.

[0075]

[0064] When injected into passage 158, the viscosity of the epoxy resin is generally between 30 and 50 Pa.s or between 30 and 45 Pa.s.

[0076]

[0065] For example, the epoxy resin used here is the epoxy resin marketed under the name: LOCTITE® STYCAST 2850FT or LOCTITE® CATALYST 23 LV.

[0066] The interface 2 also includes an assembly 180 (Fig. 8) of the ring 104 on a part. In the case of assembly 180, the part is the shaft 120. Assembly 180 prevents the ring 104 from translating in direction F onto this shaft 120. Assembly 180 is similar to assembly 150. Assembly 180 includes, in addition to the shaft 120 and the ring 104:

[0077] - a relief 184 (Fig. 6, 8) set into the wall 114 of the ring 104,

[0078] - a relief 186 (Fig. 7, 8) carved into the wall 124 of tree 120,

[0079] - a passage 188 (Fig. 7, 8) carved into the tree 120 which fluidly connects the reliefs 184, 186 to an external opening 190 (Fig. 7, 8), and

[0080] - a block 144 (Fig. 9) made of hardenable material.

[0081]

[0067] To simplify figure 7, in this figure the groove 184 of the wall 114 is not visible.

[0082]

[0068] The relief 184 is a groove. Therefore, the same reference 184 is subsequently used to designate both the relief and its groove. The groove 184 is, for example, identical to the groove 154 except that:

[0083] - it is carved into the wall 114 of the ring 104, and

[0084] - it is located between plans 108 and 126.

[0085]

[0069] The relief 186 has four notches 187 (Fig. 7, 8) evenly distributed around the axis 6. Each of these notches passes, in a respective radial direction, through the shaft 120 to open into a central recess 192 (Fig. 7, 8) formed in the center of the shaft 120. Here, the central recess 192 is further shaped to receive the movable part 140. In this particular embodiment, two of the notches 187 are also shaped to receive the lugs 146, 147 of the part 140. The notch 187 visible in Figure 8 is one of the two notches that does not receive the lugs 146, 147. Moreover, in this Figure 8, the block 144 has not been shown to improve the visibility of the notch. 187 represented.

[0086]

[0070] In this embodiment, each notch 187 has an inclined face 194 (Fig. 6, 8) located between the planes 108 and 126 opposite the groove 184. Here, the face 194 extends mainly in a vertical plane. The inclined face 194 is turned towards the plane 126. Each of the notches 187 extends, in the X direction, to the plane 126. Thus, the relief 186 does not have a second inclined face turned towards the plane 108. This is possible because the ring 104 is already blocked in translation in the X direction by the stop 122.

[0071] The passage 188 is here formed by the central recess 192 which is in fluidic communication with each of the notches 187 and, through these notches 187, with the groove 184.

[0087]

[0072] The block 144 is obtained by pouring, through the opening 190, the hardenable material inside the central recess 192 while the movable part 140 is received inside the recess 192. The hardenable material is typically the same as that used to make the lock 170. Under these conditions, the hardenable material simultaneously fills the notches 187 and the groove 184. Therefore, in the solid state, the block 144 locks the part 140 in the assembly 38 and also forms a hardenable lock 200 (Fig. 6).

[0088]

[0073] The manufacturing process for interface 2 will now be described with reference to Figure 10. To simplify the description, only the steps for assembling components 150 and 180 are described in detail. The other assembly steps for the remaining parts of interface 2 are, for example, carried out conventionally.

[0089]

[0074] Initially, during step 210, the support 34 is provided. At this stage, the bearing 36 is not received inside the receptacle 84 and the assembly 38 is not fixed onto the bearing 36.

[0090]

[0075] In the following steps, the support 34 is placed on an assembly table so that the X direction is vertical and directed upwards.

[0091]

[0076] During a step 212, the assembly 150 is carried out.

[0092]

[0077] For this purpose, during an operation 214, the bearing 36 is supplied and then assembled, for example by hand, inside the receptacle 84. Here the assembly of the bearing 36 on the support 34 consists of inserting the bearing 36 inside the receptacle 84 until the ring 102 rests directly on the bearing surface 88. At the end of the operation 214, the faces 111a and 111b are opposite each other and the grooves 154 and 156 are also opposite each other.

[0093]

[0078] Next, in an operation 216, the curable material, in a paste-like state, is injected into the passage 158 at several distributed points, for example, uniformly along the periphery of the opening 160. The curable material is injected until it completely fills the grooves 154 and 156 and at least partially fills the passage 158. For example, the curable material in a paste-like state is injected into the passage 158 using a syringe. Then, the curable material expands and spreads inside the grooves 154 and 156 under the effect of gravity. During operation 216, the air expelled by the curable material in the pasty state is also evacuated through passage 158. During this operation 216, the viscosity of the curable material in the pasty state is, for example, between 10 Pa.s and 100 Pa.s.

[0094]

[0079] During operation 216, it is possible at any time to see, through the opening 160, the areas of the cavity delimited by the grooves 154 and 156 that are already filled with the curable material. It is also possible to observe, through the opening 160, the empty areas of the cavity that are not yet filled with the curable material. It is then possible to select the locations where curable material can be injected to specifically fill these empty areas. Operation 216 ends only when it is no longer possible to discern any empty areas. At this stage, it is certain that the cavity is completely filled with the curable material.

[0095]

[0080] During an operation 218, the injected material hardens in the grooves 154, 156 and the passage 158. Once the injected material is in its solid state, the block 161 of hardenable material forms the hardenable lock 170 which immobilizes, in translation, the ring 102 inside the receptacle 84.

[0096]

[0081] In a step 220, the assembly 180 is made. For this, in an operation 222, the assembly 38 is supplied and the shaft 120 is assembled, for example by hand, inside the ring 104. For this, the shaft 120 is inserted inside the ring 104 until the ring 104 rests directly against the bearing surface 122. At this stage, the cylindrical faces 128a, 128b are opposite each other and the notches 187 are also opposite the groove 184.

[0097]

[0082] During an operation 224, the part 140 is inserted into the central recess 192.

[0098]

[0083] Then, during an operation 226, the hardenable material, in a paste-like state, is injected into the passage 188 to fill both the recess 192, the notches 187 and the groove 184 with this hardenable material.

[0099]

[0084] Then, during an operation 228, the injected material hardens and forms the hardenable lock 200.

[0100]

[0085] Examples of other possible embodiments of the assemblies 150 and 180 are now described with reference to Figures 11 to 16. These embodiments are described in the generic case of a ring 230 blocked against translation inside a part 232. Everything described in this generic case applies equally to the case of the outer ring 102 and to the case of the inner ring 104. In this generic case:

[0101] - the relief corresponding to relief 154 bears the numerical reference 234,

[0102] - the relief corresponding to relief 156 bears the numerical reference 236,

[0103] - the passage corresponding to passage 158 bears the numerical reference 238,

[0104] - the opening that corresponds to opening 160 bears the numerical reference 240,

[0105] - the block of hardenable material bears the numerical reference 241,

[0106] - the inclined faces which correspond to inclined faces 162a, 162b, 163a and 163b bear the numerical references, respectively, 242a, 242b, 243a and 243b,

[0107] - the plans that correspond to plans 108 and 110 bear the numerical references, respectively, 244 and 246,

[0108] - the range corresponding to range 88 bears the reference 248,

[0109] - the hardenable lock bears the numerical reference 250,

[0110] - the side walls opposite ring 230 and part 232 bear, respectively, the numerical references 256 and 258, and

[0111] - the axis of revolution is parallel to the X direction.

[0112]

[0086] In Figures 11 to 15, the numerical references 256 and 258 point more precisely to the centering faces of the side walls 256 and 258. These centering faces are identical to the centering faces 111a and 111b described previously. In Figure 16, the centering faces are also present but are not visible in this figure.

[0113]

[0087] Figure 11 schematically represents an unprotected assembly 260 in which the reliefs 234 and 236 are grooves, for example, identical to the grooves 154 and 156. The passage 238 comprises at least two channels 262. In this embodiment, the passage 238 consists solely of two channels 262, only one of which is shown in Figure 11. These channels 262 are cylindrical and their generatrices are inclined with respect to the axis of revolution. These channels 262 are preferably symmetrical to each other with respect to a plane containing the axis of revolution. Thus, these channels 262 are angularly offset around the axis of revolution by an angle of 180°.

[0114]

[0088] For example, the angle between the axis of revolution and the axis of the channel 262 is between 20° and 65° in this embodiment. Typically, the diameter of the channels 262 is greater than 0.5 mm or 1 mm and less than 5 mm or 3 mm. Each of these channels 262 opens on one side into an external face 264 of the part 232 and, on the opposite side, into the groove 236.

[0115]

[0089] To fill the grooves 234 and 236, the curable material is injected into one of the channels 262 until the curable material comes out through the other channel 262 or reaches the opening 240 of this other channel 262. The other channel 262 serves as a vent during the filling of the grooves 234 and 236.

[0116]

[0090] Figure 12 schematically represents an unprotected assembly 270, identical to assembly 260 except that:

[0117] - Channels 262 are replaced by channels 272, and

[0118] - groove 236 is omitted.

[0119]

[0091] The channels 272 are identical to the channels 262 except that they open directly into the cylindrical face 258, at the respective mouths 274 located opposite the groove 234. Thus, in this embodiment, the channels 272 form the passage 238 and, at the same time, the relief 236. Indeed, each of the channels 272 has a front inclined face 243a and a rear inclined face 243b.

[0120]

[0092] Figure 13 schematically represents an assembly 280 identical to assembly 260 except that the channels 262 are replaced by two bores 282 and 284 machined, respectively, in the ring 230 and in the part 232. The bore 282 extends, parallel to the axis of revolution, from the outer face 264 to the groove 234. Similarly, the bore 284 extends, parallel to the axis of revolution, from the outer face 264 to the groove 236. These bores 282, 284 form an annular passage 238 which is partly machined in the ring 230 and partly machined in the part 232. Here, this passage 238 is centered on the axis of revolution and makes a complete circumference of the axis of revolution.

[0121]

[0093] Figure 14 schematically represents an assembly 290 identical to assembly 260 except that:

[0122] - relief 234 is a projecting rib on wall 256, and

[0123] - passage 238 is identical to passage 158 previously described.

[0124]

[0094] The characteristics of the rib 234 are, for example, identical to those described in the case of the groove 154 except that they are transposed to the case of a rib projecting on the wall 256. In this case, the inclined face 242b facing the front plane is located above the inclined face 242a in the X direction.

[0095] Figure 15 schematically represents an assembly 300 identical to assembly 290 except that the rib 234 only has the inclined face 242b between planes 244 and 246. The face opposite face 242b is located in plane 244 and bears against the bearing surface 248. In this embodiment, if the adhesion of the curable material to the ring 230 and the part 232 is zero, the lock 250 only prevents the translation of the ring 230 in the X direction. The translation of the ring 230 in the opposite direction is only prevented by the bearing surface 248.

[0125]

[0096] Figure 16 schematically represents an assembly 310 identical to assembly 290 except that reliefs 234 and 236 do not extend continuously over 360° around the axis of revolution.

[0126]

[0097] In place of the rib, the relief 234 has teeth 312 projecting from the wall 256 of the ring 230. These teeth 312 are, for example, uniformly distributed around the axis of revolution. Two consecutive teeth along the periphery of the ring 230 are separated from each other by a toothless area. These teeth 312 are located between the planes 244 and 246. Here, the number of teeth 312 is greater than two or three. Each tooth 312 has inclined faces 242a and 242b. For example, the vertical section of each tooth 312 is identical to the vertical section of the rib 234 visible in Figure 14. In Figure 16, only face 242b is visible. Furthermore, each tooth 312 has two radial faces 314a and 314b rotated in opposite directions. Each radial face extends in a vertical radial plane Pr (Fig. 16) which intersects a tangent plane Pt (Fig. 16).For a given tooth, the tangent plane Pt is the vertical plane tangent to a vertical circle centered on the axis of revolution and passing through a point of intersection between this radial face and the wall 256. This tangent plane Pt is tangent to the vertical circle at the point of intersection. The angle between the radial plane Pr and the tangent plane Pt is typically between 45° and 135°. Here, it is between 80° and 100° and, for example, equal to 90°.

[0127]

[0098] The relief 236 of Figure 16 is identical to the relief 236 of Figure 14, except that the inclined face 243a does not extend continuously through 360° around the axis of revolution. To achieve this, the pattern delimited by the passage 238, the outer face 264, and the inclined face 243a of Figure 15 is omitted at regular intervals along the periphery of the lateral face 258. The remnants of this pattern form projecting teeth 318 on the wall 258 of the part 232. These teeth 318 are, for example, uniformly distributed around the axis of revolution. Two consecutive teeth along the periphery of the part 232 are separated from each other by a toothless area. The number of teeth 318 is greater than two or three. Here, the number of teeth 318 is identical to the number of teeth 312, and each tooth 318 is, for example, opposite a corresponding tooth 312. Each tooth 318 has an inclined face 243a located between planes 244 and 246.In Figure 16, the faces 243a are not visible because they are turned towards the plane 244. Each inclined face 243a is closer to the plane 246 than the face 242b of the teeth 312. In this embodiment, the inclined face 243b is identical to the inclined face 243b of Figure 14. Thus, the inclined face 243b extends continuously around the axis of revolution.

[0128]

[0099] Each tooth 318 has two radial faces 320a and 320b rotated in opposite directions. Here, each radial face 320a extends in the same radial plane Pr as the radial face 314a and each radial face 320b extends in the same radial plane Pr as the radial face 314b.

[0129]

[0100] In assembly 310, the curable material completely or at least most of the passage 238 fills the space. Under these conditions, thanks to the inclined faces 242a, 242b, 243a, and 243b, the curable lock 250 prevents the ring 230 from moving in translation, as in assembly 290. Furthermore, the lock 250 bears on one side against the radial faces 314a and, on the opposite side, against the radial faces 320b. Therefore, even if the curable material does not adhere to the ring 230 and the part 232, the lock 250 prevents the ring 230 from rotating counterclockwise about its axis of revolution. Similarly, since the lock 250 is supported on one side by the radial faces 314b and, on the opposite side, by the radial faces 320a, it also blocks the rotation of the ring 230 in the clockwise direction.Furthermore, in this embodiment, the passage 238 includes a bore that makes a complete turn around the axis 6 and opens into the front plane to form the annular opening 240, which is identical to that of the assemblies 290 and 300. The bore is identical to the bore 155 except that it does not extend continuously over 360° around the axis 6. Here, the bore is interrupted by the empty spaces between the teeth 318. However, as in the embodiment of Figure 5, this bore allows the curable material to be injected at any point around the axis 6 and also allows any empty areas to be seen through the annular opening 240.

[0130]

[0101] Chapter III: Variants:

[0102] Relief variants:

[0131]

[0103] Many different shapes are possible for the inclined faces. In particular, in a vertical section, the angle between the plane in which this inclined face extends and the axis 6 can be other than 90°. For example, this angle is between 10° and 170° and, preferably, between 45° and 135°. Therefore, instead of being rectangular, the cross-section of the grooves 154, 156 can be V-shaped or U-shaped.

[0132]

[0104] The width of the groove 154 is not necessarily equal to the width of the groove 156. Alternatively, the width of the groove 154 is greater or less than the width of the groove 156.

[0133]

[0105] In each assembly, the positions of the reliefs can be interchanged. For example, the groove 184 is cut into the wall 124 of the shaft 120 and the notches 187 are made in the wall 114. In another example, the channels 272 are made in the ring 230 instead of being made in the part 232.

[0134]

[0106] All the variants described here in the particular case where the relief is a groove can be transposed to other embodiments of this relief.

[0135]

[0107] Variants of the passage:

[0136]

[0108] The hardenable material does not necessarily fill passage 158.

[0137] Alternatively, a bore identical to bore 155 is made in the ring 102 so as to fluidly connect the groove 154 to an annular opening contained in the plane 110. In this case, bore 155 can be omitted or retained.

[0138]

[0109] The number of channels, such as channels 262 or 272, used to inject the curable material may be greater than two. The number and positions of the channels are then adjusted to ensure and facilitate complete filling of the cavity delimited by the inclined faces of the reliefs.

[0139]

[0110] Alternatively, the angular offset between channels 262, 272 is different from 180°. However, generally, this angular offset is between 90° and 270°.

[0140]

[0111] The passage can also be made solely in the ring instead of being made entirely or partially in the part. For example, alternatively, the bore 155 is made in the ring 102 instead of being made in the part 34.

[0141]

[0112] Alternatively, in the embodiment of Figure 5, the groove 156 is replaced by a recessed relief that does not extend continuously over 360° around the axis of revolution. For example, the groove 156 is replaced by a succession of undercuts formed one after the other in the side wall 78. Typically, these undercuts are arranged, for example, at regular intervals, along a circular path contained in a plane perpendicular to the axis 6. These undercuts form a succession of recesses in the wall 78 separated from each other by teeth. Thus, in this embodiment, the groove 156 is replaced by a relief formed by a succession of teeth similar to the teeth 312.

[0142]

[0113] Variants of the hardenable material:

[0143]

[0114] The curable material may be a material other than epoxy resin. For example, the curable material may be a plastic suitable for injection, via passage 158, into the cavity defined by the inclined faces. Such a plastic is, for example, rigid polyvinyl chloride (PVC) or polycarbonate (PC). The curable material may also be cement.

[0144]

[0115] The shear modulus of the hardenable material is not necessarily greater than 0.025 GPa. For example, alternatively, the hardenable lock functions as a shear lock. In this case, the hardenable material is chosen to have a shear modulus that allows the hardenable lock to break when the shear force exerted on the hardenable lock exceeds a predetermined threshold. When the hardenable lock is designed to function as a shear lock, the hardness of the hardenable material may be less than 60 on the Shore D scale. However, preferably, the hardness of the hardenable material in the solid state will remain greater than 40 on the Shore D scale.

[0145]

[0116] The viscosity of the curable material can be less than 10 Pa.s. A low viscosity of the curable material is particularly possible if it is not a problem for the curable material to also enter between the cylindrical faces 111a and 111b or between the cylindrical faces 128a and 128b.

[0146]

[0117] Conversely, the viscosity of the curable material may be greater than 500 Pa.s. In this case, the pressure to be exerted to inject this curable material is much greater and requires the use of special equipment.

[0147]

[0118] Assembly variants:

[0148]

[0119] When the lock alone provides translational locking in both the F and X directions, then the bearing surface on which the ring rests can be omitted. For example, in the case of the lock 170, the bearing surface 88 can be omitted.

[0120] In a simplified embodiment, the assembly described is implemented for only one of the bearing rings and not for both rings. In this case, the assembly of the other bearing ring is carried out differently without using a hardenable lock.

[0149]

[0121] When the width of the ring is sufficient, it is possible to use a first assembly to fix this ring to a first part and a second assembly to fix this same ring to a second part. These first and second assemblies can each be made using a hardenable lock as described in this text. For example, for this purpose, the ring has two grooves arranged one above the other.

[0150]

[0122] In another embodiment, the positions of the support and the shaft are reversed. Thus, the support is fixed to the inner ring and the shaft is fixed to the outer ring.

[0151]

[0123] Many different embodiments are possible for the bearing. For example, it could also be a roller bearing, a needle roller bearing, a tapered roller bearing, or others. It could also be a plain bearing such as a bearing known as a "bronze bearing." In this case, the bearing has a single ring fixed to the support, and the shaft slides on the inner cylindrical face of this ring when it rotates about the axis of revolution. Thus, the hardenable lock described here is used to immobilize, at least in translation, this single ring on the support. In the case of a plain bearing, preferably, the relief formed in the part or the ring does not have any cylindrical channel.

[0152]

[0124] The bearing ring(s) can be made of other materials. For example, the ring can be made of steel or plastic.

[0153]

[0125] The assemblies described in this text that can be implemented in any human-machine interface used to pilot an aircraft or other types of vehicles or devices. For example, these assemblies can be implemented in buttons, knobs, sliders, steering wheels, joysticks or any other human-machine interface.

[0154]

[0126] The assemblies described herein can also be implemented in any technical field. Thus, the teaching given in this text is not limited to the field of human-machine interfaces. For example, the assemblies described herein can be used in an actuator such as, for example, a motor, a sensor, cockpit equipment, or a circuit breaker, or in watchmaking.

[0155]

[0127] Other variants:

[0156]

[0128] Observation of the cavity filling through the annular opening 160 can be carried out after step 218 of curing the curable material. In this case, if void areas are detected at this stage, curable material can be injected into the observed void areas to remedy this manufacturing defect. Alternatively, if a void area is detected at this stage, the assembly 150 is discarded.

[0157]

[0129] Several of the variants described above can be combined in the same embodiment.

[0158]

[0130] Chapter IV: Advantages of the embodiments described:

[0159]

[0131] Due to the presence of inclined faces in the ring and the workpiece, the hardenable lock prevents the ring from translating along the workpiece in at least one direction, even if the adhesion of the hardenable material to the ring or the workpiece is zero or very weak. Thus, the translational locking of the ring does not depend on the quality of the adhesion between the hardenable material, the ring, and the workpiece. This makes the translational locking much more robust, particularly when the assembly is subjected to significant and repeated temperature variations. It also allows the described assembly to be implemented independently of the materials of the workpiece and the ring.

[0160]

[0132] To produce the hardenable lock, it is not necessary to press-fit the ring into the workpiece or vice versa. This limits the mechanical stresses applied to the ring. The hardenable lock can be produced regardless of the clearance between the centering faces. Therefore, the desired centering accuracy of the ring on the workpiece can always be achieved simply by adjusting the thickness of the gap between the opposing centering faces.

[0161]

[0133] In the assembly described here, there is no or practically no axial play. Thus, the axial position of the ring is constant over time.

[0162]

[0134] The assembly is also particularly compact because it reduces or completely eliminates the use of elements located outside the ring to prevent its translation. Thus, the use of elements such as a circlip is avoided.

[0135] Faces 111a and 111b allow the ring to be precisely centered on the part even before the curable material is injected into the cavity. Therefore, during the assembly's manufacture, it is not necessary to use external equipment to correctly center the ring on the part. Furthermore, here, faces 111a and 111b retain the curable material in the cavity during its injection through the annular bore. It is therefore not necessary to use external overmolding equipment to prevent the curable material from escaping the cavity during its injection. Since no external equipment is required to produce this assembly, its manufacture is simple.

[0163]

[0136] The annular bore forms an annular opening that allows the curable material to be injected at multiple points distributed around the axis of revolution. This facilitates filling the groove with the curable material. Furthermore, when the annular opening of this bore is facing upwards, the curable material spreads and flows inside the cavity under its own weight. Therefore, it is not necessary to inject the curable material under high pressure. Finally, after injecting the curable material, the annular opening also allows for visual verification that the injected curable material has spread evenly around the entire periphery of the reliefs, thus ensuring that there are no empty areas where the curable material is missing.Thus, unlike the assembly described in application FR1496944A, this assembly can be used in applications with a high level of operational safety and, in particular, in the field of aeronautics.

[0164]

[0137] Furthermore, this annular passage is particularly simple to produce because it can be made simply by milling. The fact that the assembly has additional inclined faces allows the hardening lock to prevent the ring from translating relative to the workpiece in both opposite directions.

[0165]

[0138] The fact that the assembly includes a bearing surface on which the ring rests prevents the ring from translating relative to the workpiece in both directions. Furthermore, the bearing surface facilitates the axial positioning of the ring relative to the bearing surface during the manufacturing of this assembly.

[0166]

[0139] The fact that the relief provided in the ring or part extends continuously over 360° around the axis of revolution simplifies the manufacturing of the assembly because an effective hardenable lock for preventing the translation of the ring in the X or F direction is obtained regardless of the angular position of the ring relative to the part. Furthermore, in the event of bearing blockage, for example following a failure, and if sufficient torque is applied between the ring and the part, then the ring can rotate around the axis of revolution because, in this case, the hardenable lock does not prevent such rotation if the adhesion of the hardenable material to the 360° relief is weak.

[0167]

[0140] When the reliefs provided in the ring and the part both extend continuously over 360° around the axis of revolution, this reinforces the robustness of the translational locking of the ring.

[0168]

[0141] The fact that the relief is a simple groove or a simple rib simplifies the assembly.

[0169]

[0142] When the annular bore and the groove are made in the same side wall, it is then possible to make, by milling, this groove and the bore at the same time.

[0170]

[0143] The presence of radial faces in the opposite reliefs makes it possible to further block the rotation of the ring relative to the part.

[0171]

[0144] The fact that the groove depth is greater than 0.1 mm and its width is greater than 1 mm facilitates the introduction of the curable material into the groove. This also increases the shear strength of the curable lock.

[0172]

[0145] The fact that the shear modulus of the hardenable material is greater than 0.025 GPa increases the robustness of the assembly.

[0173]

[0146] The fact that the hardness of the hardenable material is between 60 and 100 on the Shore D scale also increases the robustness of the assembly.

Claims

25 Demands 1. Assembly comprising a part and a ring (102; 230) of a bearing assembled on this part (34; 232), in which: - the ring comprises a front wall (105a) and, on the opposite side, a rear wall (105b) and a first lateral wall (106; 256) which connects the front and rear walls, this lateral wall being centered on an axis (6) of revolution of the bearing, - the part includes a second side wall (78) centered on the axis of revolution and located opposite the first side wall only between a rear plane (108; 244) and a front plane (110; 246) which are far apart and both perpendicular to the axis of revolution, the rear plane being closer to the rear wall than the front plane, - The assembly includes: -- a first relief (154; 234) projecting or recessed into the first side wall, this first relief having a first inclined face (162b; 242b) with respect to the axis of revolution, this first inclined face being located between the front and rear planes and turned towards the front plane, - a second relief (156; 236) projecting or recessed into the second side wall, this second relief having a second inclined face (163a; 243a) with respect to the axis of revolution, this second inclined face being located between the front and rear planes and turned towards the rear plane, the second inclined face being closer to the front plane than the first inclined face so as to form a cavity which, on the side of the rear plane, is at least partly delimited by the first inclined face and which, on the side of the front plane, is at least partly delimited by the second inclined face, - a block (161; 144; 241) of hardenable material which rests, on the rear plane side, at least partly on the first inclined face, and, on the front plane side, at least partly on the second inclined face so that the block of hardenable material forms a hardenable lock (170; 250) which blocks, independently of the adhesion force of the hardenable material on the part and the ring, the translation of the ring relative to the part in a direction parallel to the axis of revolution and directed from the rear wall to the front wall,-- at least one passage (158; 188;238) hollowed out in the part or the ring, this passage allowing the injection, after the assembly of the part and the ring, of the hardenable material used to form the block in hardenable material, and - cylindrical faces (111a, 111b) of centering opposite each other and arranged in, respectively, the first and second lateral walls between the rear plane (108) and the first inclined face (162b), the gap between these cylindrical faces being less than 0.1 mm,; characterized in that the passage (158; 238) comprises an annular bore (155; 282, 284) making a complete turn around the axis of revolution, this bore opening: - in the front plane by forming an annular opening (160; 240) which extends continuously over 360° around the axis of revolution and through which: - The curable material can be injected into the cavity at any point around the axis of revolution, and - the filling of the cavity can be observed, and - on the rear plane side, in the cavity to connect it fluidly to the annular opening (160; 240).

2. Assembly according to claim 1, wherein the first and second reliefs (154, 156; 234; 236) comprise, respectively: - a third inclined face (162a; 242a) with respect to the axis of revolution, this third inclined face being turned towards the rear plane and located between the front and rear planes, and - a fourth inclined face (163b; 243b) with respect to the axis of revolution, this fourth inclined face being turned towards the front plane and located between the front and rear planes, the fourth inclined face being closer to the rear plane than the third inclined face so that the cavity is at least partly delimited by the third inclined face on the side of the front plane and by the fourth inclined face on the side of the rear plane.

3. Assembly according to any one of the preceding claims, wherein the assembly comprises an annular bearing surface (88; 248) provided in the part (34; 232), this annular bearing surface extending in the rear plane and the rear wall of the ring (102; 230) bearing directly on this annular bearing surface.

4. Assembly according to any one of the preceding claims, wherein at least one of the first relief (154; 184; 234) and of the second relief (156; 186; 236) extends continuously over 360° around the axis of revolution and its cross-section is constant over the entire circumference of the axis of revolution.

5. Assembly according to claim 4, wherein the first and second reliefs both extend continuously over 360° around the axis of revolution and their cross-section is constant over the entire circumference of the axis of revolution.

6. Assembly according to claim 4 or 5, wherein each relief which extends continuously over 360° around the axis of revolution is chosen from the group consisting of a groove and a rib.

7. Assembly according to claim 6, wherein: - the relief (156; 236) which extends continuously over 360° around the axis of revolution is a groove, and - the annular bore (155) has an annular chamfer (166) located at the intersection between the side wall in which the groove is formed and the front plane (110; 246), this annular chamfer making a complete turn around the axis of revolution and opening out, on the side of the front plane, to form the annular opening allowing the hardenable material to be injected.

8. Assembly according to any one of claims 1 to 3, wherein: - the first relief (234) comprises a first and a second radial face (314a, 314b), each extending in a respective plane parallel to the axis of revolution, these first and second radial faces being rotated in opposite directions to each other, and - the second relief or bore comprises a third and a fourth radial faces (320a, 320b), each extending in a respective plane parallel to the axis of revolution, these third and fourth radial faces being rotated in opposite directions to each other, and 28 - the block (241) made of hardenable material also rests, at least in part, on the first, second, third and fourth radial faces so that the hardenable lock (170, 200; 250) also blocks the rotation of the ring relative to the part independently of the adhesion force of the hardenable material on the part and the ring.

9. Assembly according to any one of the preceding claims, wherein the width of the hardenable lock, in a radial direction, is greater than 0.1 mm and the height of the hardenable lock, in a direction parallel to the axis of revolution, is greater than or equal to 1 mm.

10. Assembly according to any one of the preceding claims, wherein the shear modulus of the hardenable material is greater than 0.025 GPa.

11. Assembly according to any one of the preceding claims, wherein the hardness of the hardenable material is between 60 and 100 on the Shore D scale.

12. Human-machine interface comprising an assembly (150; 280; 290; 300; 310), this assembly containing a part (34; 232) and a ring (102; 230) of a bearing assembled on this part, characterized in that the assembly conforms to any one of the preceding claims.

13. A method for manufacturing an assembly according to any one of the preceding claims, wherein the method comprises: - the supply (210, 214): - of a bearing ring comprising a front wall and, on the opposite side, a rear wall and a first side wall connecting the front and rear walls, this side wall being centered on an axis of revolution of the bearing, - of a part comprising a second side wall configured to be centered on the axis of revolution and to be located opposite the first side wall only between a rear plane and a front plane separated by 29 the other and both perpendicular to the axis of revolution, the rear plane being closer to the rear wall than the front plane, -- of a first projecting or recessed relief set into the first side wall, this first relief having a first face inclined with respect to the axis of revolution, this first inclined face being configured to be located between the front and rear planes and turned towards the front plane, -- of a second projecting or recessed relief set into the second side wall, this second relief having a second face inclined with respect to the axis of revolution, this second inclined face being configured to be located between the front and rear planes and facing the rear plane, and -- of at least one passage (158, 188; 238) cut into the part or the ring, this passage allowing the injection, after the assembly of the part and the ring, of a hardenable material, -- of cylindrical centering faces (111a, 111b) arranged in, respectively, the first and second lateral walls, - the assembly (214) of the ring and the part so that: -- that the second inclined face is closer to the front plane than the first inclined face to form a cavity which, on the rear plane side, is at least partly delimited by the first inclined face and which, on the front plane side, is at least partly delimited by the second inclined face, and -- that the cylindrical centering faces are opposite each other between the rear plane and the first inclined face, the gap between these cylindrical faces being less than 0.1 mm, then - the injection (216) into the passage of the curable material so that the curable material rests: - on the rear plane side, at least partly on the first inclined face, and - on the front plane side, at least partly on the second inclined face, then - the hardening (218) of the hardenable material to obtain a block of hardenable material which forms a hardenable lock which blocks, independently of the adhesion force of the hardenable material on the part and the ring, the translation of the ring relative to the part in a direction parallel to the axis of revolution and directed from the rear wall to the front wall, characterized in that: 30 - During supply, the passage includes an annular bore making a complete turn around the axis of revolution and opening out: - in the front plane by forming an annular opening that extends continuously over 360° around the axis of revolution and through which: - The curable material can be injected into the cavity at any point around the axis of revolution, and - the filling of the cavity can be observed, and - on the rear plane side, in the cavity to connect it fluidly to the annular opening, and - during the injection (216) the hardenable material is injected into multiple locations of the annular opening distributed around the axis of revolution then the filling of the cavity is observed through the annular opening to ensure complete filling of the cavity by this hardenable material.

Images