FR3035162A1 - ROTATING INSTRUMENT ASSEMBLY - Google Patents

Abstract

The system according to the invention comprises an instrumented rotary assembly comprising: - a fixed member (3) and a movable member (2) rotatably mounted relative to the fixed member (3) about a bearing axis (X) an instrumentation system comprising a sensor (6) provided with a detection part (9) and an encoder (5), the detection part (9) being fixed at a distance and facing the coder, - a tool positioning (10) the sensor (6) with respect to the encoder (5) which comprises a sensor casing (12), a sensor positioning support (11) (6) comprising: ○ an assembly part (13, 14) of the envelope (12) on the support (11), the envelope (12) being movably mounted on the assembly part (13, 14) according to a degree of freedom of adjustment, and ○ a positioning part (16-18) of the support (11) on the movable member (2), the positioning support (11) and said casing (12) being disassembled, after fixing of the sensor (6) on the said fixed member (3).

Description

The invention relates to the field of instrumented rotating assemblies.

More specifically, the invention relates to the field of instrumented rotating assemblies comprising: - a fixed member, - a movable member rotatably mounted about a bearing axis.

Such a rotating assembly is for example a rolling structure of a vehicle such as an axle / axle support system, or even a bearing itself. Such rotating assemblies also exist in many industries. In such a system, there is conventionally a fixed member, and a member which rotates relative to the fixed member about a bearing axis.

The fixed member may optionally be internal or external radially, relative to the movable member. Attempts have been made to instrument such rotating assemblies. Indeed, it seeks to have knowledge of the movement of the rotating assembly, for example to be able to give this information to an external system that needs it to function, or to control the proper operation of the rotating assembly, or for any a set of other reasons. For example, magnetic instrumentation is provided. To do this, there is an instrumentation system comprising a magnetic encoder and an associated sensor capable of sensing a magnetic field emitted by the magnetic encoder. The encoder comprises a multipolar ring arranged radially around the rolling axis and fixed for example to the movable member, and the sensor is fixed in this case to the fixed member (these two positions being interchangeable), the sensor comprising a detection part fixed radially at a distance and facing the ring. The detection portion is adapted to detect a magnetic field from the ring, varying according to the relative orientation of the ring and the sensor around the rolling axis. FR 2 959 541 describes an example of such a system. In the example above, the sensor and the encoder are spaced in the radial direction.

In order to obtain useful information on the movement of the rotating assembly, it is important to precisely position the detection part and the encoder relative to each other.

The invention relates to a system comprising a rotating assembly instrumented with an instrumentation system further comprising a sensor and an encoder, and positioning tooling for correctly placing an active part of the sensor with respect to the encoder, to ensure a good position of the sensor before attaching it to a fixed member of the rotating assembly. Hereinafter, a description of the invention as characterized in the claims.

According to a first aspect, the subject of the invention is a system comprising an instrumented rotating assembly comprising: a fixed member; a movable member rotatably mounted relative to the fixed member about a rolling axis; fixed member and the movable member each comprising a fixing portion spaced from one another, - an instrumentation system comprising: - a sensor provided with a detection part, - and an encoder, the encoder comprising a ring arranged radially around the rolling axis and fixed in the fixing portion of the movable member, the detection portion 20 being fixed at a distance and facing the ring, the detection part being adapted to detect a variation of position of the ring, varying according to the relative orientation of the ring and the detection part about the rolling axis, the system also comprising a positioning tool of the sensor relative to the encoder, characterized in that that the positioning tool comprises: - a sensor envelope, at least partially enveloping the sensor so that the sensor detection portion is immobilized with respect to said envelope, a sensor positioning support comprising: assembling the envelope on the support, the casing being mounted movably on the assembly part according to a degree of freedom of adjustment, and o a positioning part of the support on the movable member, the positioning support and said envelope being disassembled, after attachment of the sensor to said fixed member.

3035162 3 The positioning support allows to correctly orient the sensor housing that it has with respect to the encoder. The assembly of the sensor shell in the positioning support housing provides a precise orientation of the sensing portion of the sensor. In addition, the fact that the positioning support is disassemblable allows to remove it after fixing the sensor on the fixing portion of the fixed member of the rotating assembly. The invention may also include the following features, taken separately or in combination: According to one embodiment, the positioning part of the positioning support may comprise a bearing base on the movable member, the support base comprising a surface whose generatrices are straight lines parallel to the rolling axis, the surface having a top axis and two linear supports symmetrical with respect to said top axis.

In addition, the two linear supports may be carried by two walls forming an angle, adapted to the diameter or to a range of diameters of moving members, preferably between 80 and 175 °, preferably between 80 and 124 °, or preferably between 124 and 150 °, or preferably between 150 and 170 °.

According to an alternative embodiment, the sensor may have a sensor axis and the sensor envelope may comprise at least one groove formed in its side wall, said at least one groove being open towards the outside of the envelope, and the assembly part of the support comprises at least one projecting rail, extending in interlocking directions and inserted in said at least one groove.

According to another variant embodiment, the envelope of the sensor may be of circular section and the positioning support may comprise a housing of at least partially circular section complementary to the circular section of the envelope to accommodate at least partially the envelope. .

According to another variant embodiment, the envelope of the sensor may be of polygonal section and the positioning support may comprise a housing of at least partially polygonal section complementary to the polygonal section of the envelope to accommodate at least partially the envelope. .

According to yet another alternative embodiment, the positioning tool may comprise a spacer positioned between the detection portion of the sensor and the encoder.

According to yet another variant embodiment, the spacer may have a thickness of between 0.1 mm and 5 mm. According to yet another embodiment, the spacer can be assembled to the support removably.

According to yet another variant embodiment, the spacer may comprise at least one peripheral salient element and the positioning support may comprise at least one reception groove for accommodating said at least one salient element, said at least one groove home extending in a direction parallel to the interlocking direction and having a section 15 of complementary shape to the shape of said at least one projecting element to allow the displacement of said at least one projecting element in said at least one receiving groove in the interlocking direction, in the interlocking direction for the assembly of the spacer and the support or in the opposite direction for the disassembly of the spacer and the positioning support.

According to yet another embodiment, the positioning support may allow a movement of the sensor only according to the degree of freedom of adjustment and in a direction of assembly / disassembly.

According to yet another embodiment, the positioning support may have a through opening to allow passage to a clamping collar for fixing said support to the movable member. The invention also relates to an instrumentation kit comprising the characteristics of the instrumentation system and the positioning tooling as defined above. The invention furthermore relates to a range of instrumentation kits, comprising a plurality of instrumentation kits as defined above, the instrumentation systems of the different instrumentation kits differing, and the positioning supports of the various kits. Each of the instrumentation instruments is different in instrumentation system instrumentation of which it forms part, the positioning supports differing from each other by two dimensional characteristics, three dimensional characteristics or more than three dimensional characteristics.

The invention also relates to a positioning tool comprising the characteristics of the positioning tooling of the system as defined above. The invention also relates to a range of positioning supports comprising the characteristics of the positioning support of the system as defined above, the positioning supports differing from one another by two dimensional characteristics, three dimensional characteristics or more than three characteristics. dimensional. The invention also relates to a method of manufacturing an instrumented rotary assembly comprising: a fixed member, a movable member rotatably mounted relative to the fixed member about a rolling axis, the fixed member and the movable member each comprising a fastening portion spaced apart from each other; - an instrumentation system comprising: - a sensor provided with a detection part, - and an encoder, the encoder comprising a ring arranged radially around the rolling axis and fixed in the fixing portion of the movable member, the detection portion being fixed at a distance and facing the ring, the detection portion being adapted to detect a variation in position of the ring, varying according to the relative orientation of the ring and the detection part around the rolling axis, the method comprising a step of positioning the sensor relative to the encoder, characterized in that the positioning step uses a positioning tool comprising a positioning support and a sensor envelope, the positioning step 30 comprising the following sub-steps: positioning of the positioning support against the mobile element in the vicinity of the encoder; sensor housing and positioning support, fixing the sensor on the fixed member, 35 and if necessary disassembling said envelope and said positioning support.

According to the invention, the manufacturing method may further comprise a step of positioning a spacer on the encoder. The figures of the drawings are now briefly described. Figure 1 is a perspective view of a mobile member provided with an encoder, and a positioning tool of the sensor, in which is positioned a sensor. Figure 2 is a perspective view of a positioning support of the positioning tool shown in Figure 1, and a spacer. FIG. 3 is another partial perspective view showing the positioning support and a sensor envelope included in the positioning tool. Figure 4A is a front view of the positioning support. FIG. 4B is a rear view of the support of the assembly shown in FIG.

Figure 5 is a partial side view of the positioning support positioned on the movable member in the vicinity of the encoder. Fig. 6A is a view corresponding to Fig. 5, further showing a spacer positioned on the encoder. Figure 6B is a partial perspective view of the assembly shown in Figure 6A. Fig. 7A is a view corresponding to Fig. 6A, further showing the sensor and the sensor shell positioned in the positioning support. Fig. 7B is a view corresponding to Fig. 6B, further showing the sensor and sensor housing positioned in the positioning support.

Fig. 8 is an exploded perspective view of an instrumented rotating assembly according to another embodiment.

Fig. 9 is yet another perspective view of an instrumented rotating assembly according to another embodiment.

Fig. 10 is yet another perspective view of an instrumented rotating assembly according to another embodiment. And FIG. 11 is a schematic plan view of a portion of an instrumented rotating assembly. Hereinafter a detailed discussion of several embodiments of the invention with examples and reference to the drawings.

FIG. 1 shows an example of a first embodiment of a rotating assembly 1. The rotating assembly 1 generally comprises a movable member 2, mounted to rotate about an axis X of rolling, as well as a fixed member 3 with respect to the movable member 2. The fixed member 3 may be a piece placed close to the movable member 2: the fixed member 3 has been shown diagrammatically by a parallelepiped in FIG. it should be understood that the fixed member could comprise a wall, or any other member on which a sensor can be fixed to be held in position. For example, the fixed member 3 comprises a plate. The movable member 2 is shown in the figures by a cylinder.

In the context of the invention, use is made of an instrumented rotating assembly 1, that is to say that the rotary assembly comprises an instrumentation system 4 making it possible to detect a rotation of the movable member 2 around As an example, a magnetic instrumentation system 4 is described below, knowing that other types of instrumentation systems could be envisaged in the context of the invention, in particular optical, or by metal mass detection. The instrumentation system 4 includes an associated encoder 5 and sensor 6. In the present example, the encoder 5 and the sensor 6 must be spaced from each other in the radial direction Y.

In the embodiment shown, the encoder 5 has previously been fixed on the movable member 2. To do this, the encoder 5 comprises, in particular, a ring 7, fixed by any known means around the cylinder of the organ mobile 2, on a fixing portion of the movable member 2.

The ring 7 extends all around the cylinder of the movable member 2 and has a succession of poles having alternating polarities along its circumference (poles not shown). 11 has a width 1 (Figure 11).

The sensor 6 must be suitably fixed to a fixing portion of the fixed member 3, the fixing portion of the fixed member 3 being spaced from the fixing portion of the movable member 2 receiving the ring 7 of the encoder 5. "Suitably" will be understood to mean that the sensor is fixed in such a way that it reliably and reproducibly detects the polarity change of the encoder poles as the encoder rotates about the axis of rotation. X. To do this, the sensor 6 must be placed according to a certain position and a certain orientation with respect to the encoder 5. With regard to the position, more precisely, one is interested in the spacing between the sensor and the encoder along the axis Y. It is also interested in the positioning of the sensor relative to the encoder axially along the axis X. Because of the peripheral periodicity of the encoder, the position of the sensor in the circumferential direction seems less important. Regarding the orientation, we consider the orientation of the active portion of the sensor relative to the X and Z axes. One can also consider the orientation of the active portion of the sensor with respect to the Y axis. Detection active sensor 9, placed at the end of a body 8 of the sensor, must be positioned and oriented precisely with respect to the encoder. During the rotation of the movable member 2, and therefore of the rotation of the encoder 5, the alternating magnetic poles of the encoder 5 pass successively opposite the active detection part 9 of the sensor 6, which is adapted to detect the polarity the magnetic pole that immediately faces it (continuous or Boolean signal). The detected information is transmitted to a central unit (not shown) by a transmission member 60 (FIGS. 8, 9 and 10), for example wired, to be processed by the central unit which can deduce therefrom a certain number of information relating to the relative rotation of the movable member 2.

According to the invention, the rotating assembly also comprises a tool 10 for positioning the sensor 6 with respect to the encoder 5, ensuring a suitable positioning of the sensor 6 with respect to the encoder 5 and in particular of the detection part 9 of the sensor 6 at a distance and facing the ring 7 of the encoder 5. FIG. 1 does not show the instrumented rotary assembly in operational operating condition, but in a position-setting state, before final fixing of the sensor 6 on the fixing portion of the fixed member 3 of the instrumented rotating assembly. The positioning tooling 10 comprises at least two elements: a support 11 to be placed on the movable member 2 and an envelope 12 designed to at least partially accommodate the sensor 10 6. Where appropriate, the envelope 12 is the envelope 6. The support 11 also comprises a housing 13 in which the envelope 12 can be inserted. To do this, the housing 13 has a shape at least partially complementary to that of the envelope 12. In the context of the embodiments shown in Figures 1 to 8, the casing 12 is cylindrical and the housing 13 is partially cylindrical, having a housing axis D1 (see Figure 2). In addition, the support 11 has a through opening 110, transversely. This opening 110 gives passage to a plastic clamp or other suitable material (collar not shown), to secure the support 11 on the movable member 2 to facilitate the introduction of the tool (the opening 110 allows the passage of the plastic collar 20 in the tool). In the upper part of the positioning support 11, the inner wall 130 of the partially cylindrical housing 13 is extended. The prolonged inner wall 130 is carried by two projecting portions 131 of the support 11, symmetrical, on either side of the housing 13.

The housing 13 also comprises a rail 14, parallel to the housing axis D1, which may optionally be discontinuous. The casing 12 has a groove 15 formed in the side wall 16 of the casing 12 in a direction parallel to the axis of the cylindrical casing, the groove 15 being open towards the outside of the casing 12. The groove 15 is of such size that it can accommodate the rail 14 of the housing, so that the envelope 12 can slide on the rail 14 by inserting the rail 14 in the groove 15.

The casing 12 is thus movably mounted in the housing 13 of the support 11 in a direction parallel to the housing axis D1.

Thus designed, the envelope 12 is assembled to the guide support which allows a degree of freedom of movement of the envelope relative to the support: it is a translation of the envelope in the direction of the rail. 14 (gap adjustment direction). Furthermore, the casing 12 is still movable relative to the support in a direction of assembly / disassembly of the support, for example different from the direction of adjustment of the gap. In this case, it is the X direction.

Indeed, and in accordance with the invention, the assembly system of the envelope on the support can be provided to prevent any parasitic movement of the active part of the sensor relative to the encoder during adjustment. The only authorized movement is the movement allowing the assembly (or disassembly) of the envelope to the support.

Thus, the design of the positioning support according to the invention prevents the rotation of the sensor around the axis D1 of the sensor, around the X axis, and any translational movement of the sensor (and therefore its active part) along the axis Z. The support thus defines the position of the sensor 12 according to a certain number of degrees of freedom, leaving a degree of freedom to the envelope to move, allowing its assembly and disassembly, and a degree of freedom to the envelope to move for the adjustment of the gap. Due to the presence of the rail 14 and the groove 15, the casing is inserted in a particular orientation, since the casing can not pivot about the Y axis in the housing 13, which ensures stability of the casing. envelope 12 when it is inserted in the housing 13. The cylindrical casing 12 is designed to accommodate the sensor 6. To do this, the cylinder of the casing 12 is hollow and the sensor 6 can be inserted into the recess 30 of the cylinder in an axial direction. The axis of the sensor 6 is thus coincident with the axis of the envelope when the sensor 6 is inserted into the envelope 12. The envelope 12 is held on the fixed member 3 by means of a nut system or with clamping rings 120.

In this way, the groove 15 of the casing and the rail 14 of the support 11 are parallel to the axis of the sensor 6 when the sensor 6 is placed in the casing 12 and the casing 12 is inserted into the casing 12. the housing 13 of the support 11.

In order to properly position the sensor 6 with respect to the encoder 5, it is necessary that the sensor 6 is properly placed relative to the support 11 and that the support 11 is placed properly with respect to the encoder 5.

To ensure the proper placement of the sensor 6, the positioning support 11 comprises a support base 16, providing a stable support on the movable member in a position which ensures that the rail 14 of the housing 13 of the support 11 is oriented perpendicularly. to the encoder 5 (thus radially to the movable member 2).

Thus, thanks to the support base 16, when the sensor 6 is positioned in the casing 12 inserted in the housing 13, and the support 11 is placed on the movable member 2, the axis of the sensor is oriented radially. relative to the movable member 2. More particularly, the support base 16 prevents any rotation of the support 11 around the Y and Z axes.

To ensure this positioning, the support base comprises a V-shaped profile, visible more particularly in FIGS. 4A and 4B. It should be understood that the bottom could have another shape of profile, provided that the bottom is defined by a surface whose generatrices are straight lines parallel to the X axis, having a top axis 17 of symmetry and providing two linear bearings of is symmetrical with respect to the summit axis 17.

The V-shaped profile has a concavity facing the outside of the support. It has an upper axis 17 bottom, on both sides of which extend two symmetrical walls 18 which are flat.

The top axis 17 is perpendicular to the rail 14 of the support and is parallel to the axis X of the movable member 2. Thus, the axis of the sensor 6 placed in the housing 13 is also perpendicular to the top axis 17. The flat walls 18 are tangent to the surface of the movable member 2, when the bearing base 16 35 rests on the movable member 2, because it is the flat walls 18 which rest on the surface of the organ mobile 2.

The flat walls 18 rest on the surface of the movable member 2, each resting along a straight line parallel to the top axis 17. In this way, when the bearing base 16 is positioned against the the surface of the movable member 2, the axis of the sensor, perpendicular to the top axis 17, is oriented radially relative to the movable member 2. The two symmetrical symmetrical walls 18 form an obtuse angle α, substantially 170 This angle is adapted to the diameter or a range of diameters of movable members between 40 and 160 mm. It should be understood that an angle greater or smaller would also be suitable. For example, for a cylinder 80 mm in diameter, the angle a could be between 124 and 170 °. For a cylinder 40 mm in diameter, the angle a could be between 80 and 150 °. Finally, for a cylinder 160 mm in diameter, the angle could be between 150 and 170 °.

The advantage of such a V-shape is to be able to position the support 11 on cylindrical movable members 2 of different diameters. The support 11 comprises two spaced circumferentially spaced abutments 39 which both abut the edge of the ring 5, thus defining on the one hand the position of the support 11 with respect to the ring along the X axis, and on the other hand the orientation of the support 11 around the Y axis. The only degree of freedom allowed to the support 11 is its position in the circumferential direction, which is indifferent because of the periodicity of the ring. Once in position, if necessary, the support 11 is held on the movable member 2 by any appropriate means (by a band of adjustable length clamping together the two components, for example).

An appropriate means may also be provided for holding together the support 11 and the envelope 12 which is assembled to it (by an adjustable length band sandwiching the two components together, for example).

The elements of the positioning tool 10 which have just been described provide positioning in a radial direction with respect to the movable member. The positioning tool may also comprise a spacer which makes it possible to place the active part 9 of the sensor 6 at a predetermined distance from the encoder 5. The spacer thus makes it possible to adjust the last degree of freedom of the sensor 6 with respect to the encoder 5 .

FIGS. 1 and 2 show a first embodiment of a spacer 19 that may comprise a positioning tool of a rotary assembly according to the invention. According to this first example, the spacer may be attached to the support 11. The spacer is intended to be interposed between the sensor and the ring. It is, in this example, removable, can be removed from between the sensor and the ring. It can also be removable from the support 11. The spacer 19 is made by a rectangular plate 20 which has two long sides 21 and two short sides 22.

On the edge of one of the long sides 21, the spacer has two projections 23 of substantially triangular shape, one of whose vertices is integral with the long side 21 of the spacer. The protrusions 23 have the same thickness as the plate 20 and are made in one piece with the plate 20. The projections temporarily secure the spacer 19 to the positioning support 11, so as to immobilize during placement of the sensor surrounded by the envelope in the positioning support 11.

To do this, the positioning support comprises two hollow rails 24, open towards the outside of the positioning support 11, and arranged in a side wall 25 of the support, on either side of the housing 13.

The side wall 25 is situated at a distance from the projections 131 of the positioning support 11. This allows the protruding parts 131 to be positioned above the ring 7 of the encoder 5 so that the sensor 6 (surrounded by the 12) is held on its periphery above the encoder 30 (see FIG. 5). The two hollow rails 24 are of triangular section, whose shape and dimensions are complementary to those of the projections 23. The two hollow rails 24 have a closed end 26 and an open end 27 towards the outside of the positioning support 11.

In order to keep the spacer 19 in place, the protrusions 23 are inserted by each of the open ends 27 into each of the rails 24 of the positioning support. The plate 20 is positioned on the ring 7 of the encoder 5. In particular, the ring 7 being magnetic, the spacer 19 can be held temporarily on the ring 7 by magnetization. To adjust the height of the active part of the sensor 6 above the encoder, the desired number of spacers is stacked.

Reference will now be made to FIGS. 6A to 7B to describe a mode of use of the positioning tooling 10 of the rotary assembly according to the invention. The rotating assembly to be instrumented comprises a fixed member 3 and a movable member 2. An instrumentation kit is provided comprising a sensor 6, an encoder 5, and a positioning tool comprising the envelope 12, the positioning support 11 , and a plurality of spacers 19. It is noted here that the instrumentation kit is suitable for any type of rotating assembly. Indeed, it can be used regardless of the diameter of the movable member 2 (in the example, by the V shape of the bearing base), and whatever the position of the fixed member 3 (in the example, by the mobility of the nuts 120). Indeed, the sensor 6 may be fixed on the fixed member 3 regardless of the position thereof in the range accessible to the nuts 120, simply by moving the nuts 120 in this range and fixing the fixed member 3 between them. The positioning tool may be a universal system suitable for any sensor / encoder system. It will suffice for the envelope 12 to be large enough to accommodate any type of known sensor. Alternatively, however, it could be provided that the positioning tool is specific to the sensor / encoder system to be used. In this case, it is expected to have several different instrumentation kits, each having an encoder, a sensor, and the positioning tool is specific to the sensor / encoder system used. In this case, the instrumentation kits may differ in particular by the width 1 of the encoder ring 7. If it is desirable for the sensor 6 to face the middle of the encoder ring, as shown in FIG. , the dimension d = 1/2, intrinsic to the positioning support 11, corresponding to the distance between the abutment surfaces 39 and the center of the housing 13, is specific to the positioning support 11 of this kit.

Thus, it will be possible to have several positioning supports differing in their length d, according to the width 1 of the encoder ring 7 to be used.

It should be noted that in this case another variable is the dimension D. Indeed, the dimension D can be a standard. But, alternatively, different envelopes 12 could have different dimensions D (which could be the case especially if the envelope 12 was the integral envelope of the sensor 6). In this case, one could have several positioning supports differing in their dimension D, according to the axial dimension representative of the sensor 6. Thus, one could have several positioning supports differing both in their dimension D, and by their size. d.

Another variable is the value of the angle a. Thus, it will be possible to have several positioning supports differing in their angle α, and to choose a positioning support that is suitable as a function of the diameter of the movable member.

Thus, an instrumentation kit is selected which is suitable for the rotating assembly to be instrumented. In cases where the envelope 12 is not already integrated in the sensor 6, the envelope 12 is placed and fixed around the sensor 6.

The spacer 19 is assembled in the support 11 in the high position by introducing the projections 23 into the open end 27 of the hollow rails 24. If the gap to be made requires several spacers 19, we can assemble several then. The assembly constituted by the sensor 6 and the envelope 12 is then inserted into the housing 13 of the positioning support 11 by introducing the rail 14 of the housing 13 into the groove 15 of the envelope 12 and sliding the envelope 12 in the housing downward, in the direction of the rail (which is the direction of sliding), until the active part 9 of the sensor 6 abuts against the spacer 19 (see Figures 7A and 7B). The envelope 12, the positioning support 11 and the spacer 19 (or the spacers 19) are held together, for example with one hand. The positioning support 11 is then placed on the movable member 2 by placing the two walls 18 of the bearing base 16 on the outer surface of the movable member 2.

The stops 39 of the wall 25 of the positioning support 11 are then brought in abutment against the ring 7 of the encoder 5, to position the projections 31 of the support 11 above the encoder 5 (see FIGS. 6A and 6B).

The casing 12 is then slid into the housing downward in the direction of the rail (which is the sliding direction) until the lowest spacer 19 abuts against the encoder.

In FIG. 7A or 7B, the sensor is suitably positioned relative to the encoder 5 and can then be fixed to the fixed member 3 of the assembly. Once the fixing is completed, the positioning support can be disassembled by sliding the positioning support 11 towards the rear (this is the sense of disassembly).

Then, the spacer 19 is removed from the positioning support 11, the projections 23 leave the hollow rails 24 by the open ends 27. It should be understood that the invention is not limited to the presence of a spacer, and if the tooling includes a spacer, it is not necessarily made such as that just described. FIG. 8 shows another form of spacer, formed by a simple disk 28 to be positioned between the encoder 5 and the active part 9 of the sensor 6.

The spacer 28 is, in this embodiment, independent of the support 11 (it is not intended to cooperate with it). Thus, the support no longer comprises rails 24. In this example, the spacer is a simple disk 28 but it should be understood that the spacer 30 could have another shape without departing from the scope of the invention. Whether it is the spacer 19 or the spacer 28, they each comprise a predetermined thickness which is imposed by the operating characteristics of the associated sensor 6 and encoder 5.

In this exemplary embodiment, the spacer is temporarily assembled to the ring, for example by magnetism.

The assembly constituted by the sensor 6 and the envelope 12 is then inserted into the housing 13 of the positioning support 11 by introducing the rail 14 of the housing 13 into the groove 15 of the envelope 12. The two products being held together for example manually, the positioning support 11 is positioned relative to the ring. The casing 12 is slid into the housing downward in the direction of the rail (which is the direction of sliding), until the active part 9 of the sensor 6 abuts the spacer 19, 28. The envelope 12 is then fixed to the fixed member. The spacer 19, 28 and the positioning support 11 can be removed independently of one another. An advantage of this embodiment is to be able to adjust the air gap by adding / removing struts, while maintaining the positioning support 11 correctly positioned. Simply slide the envelope 12 upwards to add / remove a spacer, then slide it down again abutting on the highest spacer. Preferably, the thickness of a spacer used in the context of the invention is substantially between 0.1 and 5 mm. The invention is also not limited to a cylindrical shape for producing the envelope 12, or an at least partially cylindrical shape for producing the housing 13.

Figures 9 and 10 illustrate two further embodiments of envelopes and positioning supports with housing adapted to the shape of the envelope. In both examples, the envelopes and the housing of the supports respectively have a section of polygonal (more precisely square) or partially polygonal (more precisely U-shaped) shape. Figure 9 shows an envelope 29 of substantially square section and a housing 30 formed in the positioning support 11, of at least partially complementary shape.

The housing 30 comprises a rail 14 as in the example illustrated in FIGS. 1 to 8 and one of the faces 31 of the envelope 29 has a groove 15 which runs can run over the entire height of the envelope 29. .

The end 32 of the envelope 29 has a protruding portion 33 for protecting the active sensing portion 9 of the sensor 6. The square or partially square shape of the section of the envelope 29 and the housing 30, respectively, prevents any pivot of the casing 29 in the housing 30 around the Y axis. This is why the rail 14 is not mandatory. The embodiment shown in FIG. 10 illustrates a casing 34 of substantially cubic shape, and a housing 35 formed in the U-shaped positioning support 11.

The bottom of the U of the housing 35 is formed by a flat bottom wall 36 whose width corresponds to the width of the sides 37 of the cubic envelope 34. The housing 35 also comprises two walls 38, adjacent and perpendicular to the wall The U-shaped housing thus forms, by design, a guide rail in which the cubic shell 34 is slidable in a direction given by the direction of the inner walls 36 and 38 of the housing 35.

Thus, it should be understood that the invention is not specifically limited to the embodiments which are presented above and extends to the implementation of any equivalent means.

In particular, it could (for example) be provided with a discontinuous rail in the embodiment shown in FIGS. 1 to 3: a discontinuous rail could allow the operator a simpler engagement of the groove 15 in the rail 14. the engagement is in the direction of the Y axis, assuming the part of the rail a little thinner (in the case of a smaller fit in the groove) the operator could start the engagement without having to perform an alignment perfect.

Part of the groove being thus partially engaged, the envelope is then partially guided and / or aligned: it is thus possible to provide a wider lower rail portion (adjustment of the tight) which would align more precisely the envelope.

5 A sequence of "less adjusted" to "more adjusted" facilitates the commitment at first for the operator, then promotes the correct positioning of the envelope.

In the case of an adjustment along the X axis, a rail 14 could be designed with connecting radii between the normal axis face X and the two normal axis faces Z to achieve a similar assembly principle. . It could also be provided a principle of "stair steps": the first step being thicker along the Z axis lower than the second step that would guide it, the end of engagement.

A total or partial combination of these two solutions could also be envisaged. 20

Claims (18)

REVENDICATIONS1. System comprising an instrumented rotating assembly comprising: - a fixed member (3), - a movable member (2) rotatably mounted relative to the fixed member (3) about a bearing axis (X), the fixed member (3) and the movable member (2) each comprising a fixing portion spaced apart from each other, - an instrumentation system comprising: - a sensor (6) provided with a detection part (9) - and an encoder (5), the encoder (5) comprising a ring (7) arranged radially around the bearing axis (X) and fixed in the fixing portion of the movable member (2), the part sensor (9) being fixed at a distance and facing the ring, the detection part (9) being adapted to detect a variation in the position of the ring (7), varying according to the relative orientation of the ring (7), ring (7) and the detection part (9) around the bearing axis (X), the system also comprising a positioning tool (10) of the sensor (6) relative to the encoder (5). ), characterized in that the positioning tool (10) comprises: - a sensor casing (12), at least partially enveloping the sensor (6) so that the sensor detection portion (9) is immobilized relative to to said envelope (12), - a support (11) for positioning the sensor (6) comprising: o an assembly part (13, 14) of the envelope (12) on the support (11), the envelope (12) being movably mounted on the assembly part (13, 14) according to a degree of freedom of adjustment, and o a positioning part (16-18) of the support (11) on the movable member (2), the positioning support (11) and said casing (12) being disassembled, after attachment of the sensor (6) to said fixed member (3). 2. System according to claim 1, wherein the positioning portion (16-18) of the support (11) for positioning comprises a bottom (16) of support on the movable member (2), the bottom (16) d support having a surface whose generatrices are straight parallel to the bearing axis (X), the surface having a top axis (17) and two linear supports (18) symmetrical with respect to said top axis (17). 3035162 21 3. System according to claim 2, wherein the two linear supports are carried by two walls (18) which form an angle, adapted to the diameter or to a range of diameters of moving members, preferably between 80 and 175 °. preferably between 80 and 124 °, or preferably between 124 and 150 °, or preferably between 150 and 170 °. 4. System according to claim 2 or 3, wherein the sensor (6) has a sensor axis (Y) and wherein the envelope (12) of sensor (6) comprises at least one groove (15) in its lateral wall, said at least one groove (15) being open towards the outside of the casing (12), and wherein the connecting part (13, 14) of the support (11) comprises at least one projecting rail (14), extending in interlocking directions and fitting into said at least one groove (15). 5. System according to one of claims 1 to 4, wherein the casing (12) of the sensor (6) 15 is of circular section and wherein the support (11) for positioning comprises a housing (13) of section to less partially circular complementary to the circular section of the envelope (12) to at least partially accommodate the envelope (12). 6. System according to one of claims 1 to 4, wherein the casing (12) of the sensor (6) 20 is of polygonal section and wherein the support (11) for positioning comprises a housing (30; 35) of at least partially polygonal section complementary to the polygonal section of the envelope (12) to at least partially accommodate the envelope (12). A system according to any one of the preceding claims, wherein the positioning tool (10) comprises a spacer (19) positioned between the sensing portion (9) of the sensor (6) and the encoder (5). 8. System according to claim 7, wherein the spacer (19) has a thickness between 0.1mm and 5 mm. 30 9. System according to one of claims 6 or 7, wherein the spacer (19) is removably assembled to the support. 10. System according to claim 9, wherein the spacer (19) comprises at least one projecting peripheral element (23) and in which the positioning support (11) comprises at least one reception groove (24) for accommodating said at least one projecting element (23), said at least one receiving groove (24) extending in a direction parallel to the interlocking direction and having a section of shape complementary to the shape of said at least one protruding element (23) for allowing said at least one projecting element (23) to move in said at least one receiving groove (24) in the interlocking direction, in the interlocking direction for the assembly of the spacer (19) and support (11) or in the opposite direction for disassembling the spacer (19) and the support (11). A system as claimed in any one of claims 1 to 10, wherein the positioning support (11) permits movement of the sensor (6) only in accordance with the degree of freedom of adjustment and in a direction of assembly / disassembly. 12. System according to any one of the preceding claims, wherein the positioning support (11) has a through aperture (110) to allow passage to a clamping collar for securing said support to the movable member (2). and / or the envelope. 13. An instrumentation kit comprising the features of the instrumentation system and positioning tooling according to any one of claims 1 to 12. 14. A range of instrumentation kits, comprising a plurality of instrumentation kits each according to claim 13, the instrumentation systems of the different instrumentation kits differing, and the positioning supports of the different instrumentation kits differing, each being adapted to the instrumentation system of the instrumentation kit of which it forms part, the positioning supports differ from each other by two dimensional characteristics, three dimensional characteristics, or more than three dimensional characteristics. Positioning tool comprising the features of the positioning tool of the system according to any one of claims 1 to 13. A range of positioning supports comprising the features of the system positioning support according to any one of claims 1 to 13, the positioning supports differing from one another by two dimensional characteristics, three dimensional characteristics, or more than three characteristics. dimensional. 30 35) 3035162 23 17. A method of manufacturing an instrumented rotary assembly comprising: - a fixed member (3), 5 - a movable member (2) rotatably mounted relative to the fixed member (3) about a bearing axis (X ), the fixed member (3) and the movable member (2) each comprising a fixing portion spaced from each other, - an instrumentation system comprising: - a sensor (6) provided with a detection part (9), - and an encoder (5), the encoder (5) comprising a ring (7) arranged radially around the bearing axis (X) and fixed in the fastening portion of the member mobile (2), the detection part (9) being fixed at a distance and facing the ring (7), the detection part (9) being adapted to detect a variation of position of the ring (7), 15 varying according to the relative orientation of the ring (7) and the detection portion (9) about the rolling axis (x), the method comprising a step of positioning the sensor (6) relative to at the cod 5, characterized in that the positioning step uses a positioning tool (10) comprising a positioning support (11) and a sensor casing (12), the positioning step comprising the sub-steps. following: - positioning of the positioning support (11) against the movable member (2) in the vicinity of the encoder (5), - assembly of the sensor casing (12) and the positioning support (11), - fixing of the sensor (6) on the fixed member (3), 25 - and if necessary disassemblable said envelope (12) and said positioning support (11). 18. The manufacturing method according to claim 17, further comprising a step of positioning a spacer (19) on the encoder.