FR3060685A1 - METHOD FOR MANUFACTURING A WEAR RETRIEVAL MEMBER FOR A CLUTCH MECHANISM - Google Patents

Abstract

The invention relates to a method of manufacturing a wear compensating member for a clutch mechanism, particularly for a motor vehicle, comprising the steps of: a) cutting a strip (46) in a metal sheet, said strip (46) having a first longitudinal edge (48) and a second longitudinal edge (49), relative to the axis of the strip (46), the second longitudinal edge (49) having at least one ramp (23) inclined by relative to said longitudinal direction, said band (46) having two ends (47), b) bending, for example by rolling, said band (46) and then assembling the ends (47) of the band (46) together by welding, in order to form a first annular element, c) to fix a second element on the first element, the second element comprising a toothed zone.

Description

060 685

62708 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders)

©) National registration number

COURBEVOIE © IntCI ⁸ : F16 D 13/75 (2017.01)

PATENT INVENTION APPLICATION

A1

©) Date of filing: 19.12.16. © Applicant (s): VALEO EMBRAYAGES Company by (30) Priority: simplified actions - FR. @ Inventor (s): BRAILLY JULIEN, DELIENCOURT NICOLAS and MARECHAL OLIVIER. (43) Date of public availability of the request: 22.06.18 Bulletin 18/25. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): VALEO EMBRAYAGES Company by related: simplified actions. ©) Extension request (s): (© Agent (s): VALEO EMBRAYAGES Company by simplified actions.

WEARING FOR A MECHANISM

METHOD FOR MANUFACTURING A CLUTCH MEMBER.

FR 3 060 685 - A1

The invention relates to a method of manufacturing a wear take-up member for a clutch mechanism, in particular for a motor vehicle, comprising the steps consisting in:

a) cutting a strip (46) from a metal sheet, said strip (46) having a first longitudinal edge (48) and a second longitudinal edge (49), relative to the axis of the strip (46), the second longitudinal edge (49) comprising at least one ramp (23) inclined relative to said longitudinal direction, said strip (46) comprising two ends (47),

b) bending, for example by rolling, said strip (46) then assembling the ends (47) of the strip (46) together by welding, so as to form a first annular element,

c) fixing a second element on the first element, the second element comprising a toothed zone.

PROCESS FOR THE MANUFACTURE OF A CATCH-UP MEMBER

WEAR FOR A CLUTCH MECHANISM

The present invention relates to a method of manufacturing a wear take-up member for a clutch mechanism, in particular for a motor vehicle.

A clutch mechanism belongs, more generally, to a clutch device.

A clutch device conventionally comprises a reaction plate, a clutch mechanism comprising a movable pressure plate, and a friction disc mounted between said reaction and pressure plates. The movement of the pressure plate is controlled by a diaphragm, itself controlled by a clutch stop.

The clutch bearing can be of the actuated pilot type, or hydraulic control, or cable control, in order to exert a predetermined force on the diaphragm and to move it into a disengaged position.

The pressure plate is thus movable between a clutch position in which the friction disc is clamped between said pressure and reaction plates, and a declutch position in which the friction disc is released.

The use of the clutch device causes wear of the friction disc linings as well as the counter-materials of the associated pressure and reaction plates. This results in a variation of the position of the pressure plate with respect to the associated diaphragm and / or with respect to the reaction plate, generating a variation in the tightening force of the friction disc and a modification of the licking point and the stroke of the clutch bearing. Remember that the licking point is the position from which a torque can be transmitted through the clutch device.

A wear take-up clutch device is known from document FR 2 847 626 in the name of the Applicant. This document discloses a wear take-up clutch device for a motor vehicle, comprising a pressure plate intended to come to bear on a friction disc of the clutch device, a diaphragm serving to actuate the pressure plate between a fully engaged position in which said pressure plate is pushed against the friction disc, and a fully disengaged position in which said pressure plate is moved away from the friction disc by means of return means of the pressure plate.

The pressure plate, the friction disc and the diaphragm are housed in a cover which is fixed relative to the reaction plate.

The device further comprises a member for taking up the wear of the friction disc, interposed between the diaphragm and the pressure plate, and movable in rotation about an axis within a determined range, said take-up member comprising a cooperating ramp with a counter ramp on the side of the pressure plate, so as to adjust the distance between the diaphragm and the pressure plate and compensate for the wear of the friction disc as a function of the position of the ramp relative to the counter ramp .

The clutch device further comprises displacement means comprising a ratchet wheel capable of pivoting around an axis mounted on a cassette. The displacement means also comprise a pawl comprising a body fixed on the cover and an actuating tab cooperating with the ratchet wheel so as to actuate the pivoting of the ratchet wheel in the event of wear. The ratchet wheel is coupled in rotation to an endless screw mounted around the aforementioned axis and meshing with a toothing of the take-up member. Thus, the rotation of said ratchet wheel causes the take-up member to move so as to compensate for wear.

The wear take-up member more particularly comprises:

- a first annular element, obtained by a pressing and cutting process on a press, one axial end of which comprises ramps inclined relative to the radial plane, intended to cooperate with counter-ramps of the pressure plate,

- a second element comprising a toothed part, fixed by riveting to the first element,

- a third element forming a balancing element, fixed by riveting to the first element and situated diametrically opposite with respect to the second element.

The second element is engaged axially between lugs and a radial wall of the cassette, so as to hold it axially in position opposite the axis of the worm. This ensures an effective mesh between the toothed part and the worm.

The second element is capable of being elastically deformed so as to allow the axial movement of the first element in order to adapt to the axial movement of lifting or lowering of the pressure plate during the clutch or disengage phases.

The stamping process requires expensive press tools. In addition, the stamping process generates, in the development of the first annular element, a loss of material, not valued, located in the center of the annular part.

The invention aims to propose a simple and economical method of manufacturing such a wear take-up member.

To this end, it proposes a method of manufacturing a wear take-up member for a clutch mechanism, in particular for a motor vehicle, comprising the steps consisting in:

a) cutting a strip from a metal sheet, said strip comprising a first longitudinal edge and a second longitudinal edge, relative to the axis of the strip, the second longitudinal edge comprising at least one ramp inclined relative to said longitudinal direction, said strip having two ends,

b) bending, for example by rolling, said strip then assembling the ends of the strip together by welding, so as to form a first annular element,

c) fixing a second element on the first element, the second element comprising a toothed zone.

Such a method makes it possible to produce a wear take-up element in a simple, rapid and inexpensive manner. In addition, such a method makes it possible to limit the loss of material during the manufacturing process.

The rolling operation is a particular form of bending which makes it possible to shape, that is to say to bend the strip in order to make the two ends of the strip match before the welding operation.

During step a), the strip can be cut so as to have tabs extending perpendicular to the longitudinal direction of the strip, said tabs being folded so as to extend radially outward from the rest of the band. Advantageously, the tabs are folded back at 90 ° after bending the strip. Alternatively, the tabs can be folded back before bending the strip.

The tabs made of material with the rest of the strip make it possible to further facilitate the manufacture of the first element.

Advantageously, the tabs are folded at 90 ° relative to the rest of the strip.

A third element, called a balancing element, can be fixed to the first element, the third element being diametrically opposite the second element relative to the axis of the first annular element.

The balancing part makes it possible to limit or avoid unbalances so as to reduce vibrations in operation, when the wear take-up member is rotated with the rest of the clutch mechanism, around its axis.

The second element and / or the third element can be fixed to the legs of the first element, for example by riveting.

The second element and the third element can be obtained by cutting a sheet, the second element and the third element each having the shape of an arc of a circle.

The arc of a circle can have the same center as the axis of the first annular element.

The third element can come in one piece with the strip, said third element being folded so as to extend radially outwards relative to the rest of the strip after bending of said strip.

The invention also relates to a wear take-up member for a clutch mechanism, in particular for a motor vehicle, obtained by the aforementioned manufacturing process.

Said catching member may include:

a first annular element of axis X, one axial end of which comprises at least one ramp inclined relative to the radial plane, intended to cooperate with a counter-ramp of the clutch mechanism, the first element being obtained by bending, for example by rolling, a strip then welding the ends of the strip together,

- a second element comprising a toothed zone.

In addition to the ramp function, the first annular part can also ensure the centering of the take-up member, for example by cooperation with studs of a pressure plate of the clutch mechanism. The studs may have come in one piece with the pressure plate. As a variant, the studs can be added to the pressure plate.

Advantageously, the studs form a discontinuous bore. Alternatively, the wear take-up member can be received in a continuous bore formed directly in the pressure plate.

The toothed part is capable of meshing with an endless screw actuated in the event of wear of a friction disc, so as to rotate the ramp relative to the corresponding counter-ramp.

Such a wear take-up member has a simple and inexpensive structure to manufacture.

The second element can be elastically deformable so as to allow the axial displacement of the toothed zone relative to the ramp of the first element, by elastic deformation of the second element.

The elasticity of the toothed part allows the toothed part to be held in position axially opposite the axis of the corresponding worm, said worm being axially fixed, while allowing axial movement of the first part carrying the ramps, so as to adapt to the axial movement of lifting or lowering of the pressure plate during the clutch or disengage phases. Such an axial movement of the first part is for example between 1 and 5 mm.

The first element may have tabs extending from the rest of the first annular element, radially outward.

The member may include a third element, called a balancing element, fixed to the first element and diametrically opposite the second element relative to the axis of the first element.

The balancing part makes it possible to limit or avoid unbalances so as to reduce vibrations in operation, when the wear take-up member is rotated with the rest of the clutch mechanism, around its axis.

The second element and / or the third element can be fixed to the legs of the first element, for example by riveting.

The first element and the third element can have come in one piece.

The second element may comprise a middle portion in the form of an arc of a circle of axis X, the radially outer edge of which has a toothed zone carrying teeth, said middle portion being connected, at its circumferential ends, to the first element, via radially extending connecting portions.

In other words, the middle portion of the second element is separated from the first element by at least one opening or at least one slot in the form of an arc of a circle, of axis X. The circumferential ends of said opening or of said slot are delimited by the connecting portions extending radially. Alternatively, the middle portion of the second element can be separated from the first element by a plurality of openings or a plurality of slots.

Such a structure offers good axial elasticity to the toothed part, while being relatively simple.

The teeth can be oriented radially outwards.

The third element may comprise a median portion in the form of an arc of a circle of axis X, said median portion being connected, at its circumferential ends, to the first element, by means of connecting portions extending radially.

In other words, the medial portion of the third element is separated from the first element by at least one opening or at least one slot in the form of an arc of a circle, of axis X. The circumferential ends of said opening or of said slot are delimited by the connecting portions extending radially. Alternatively, the middle portion of the third element can be separated from the first element by a plurality of openings or a plurality of slots.

The first element can be cylindrical.

The second element and / or the third element may extend in a radial plane.

The second element can extend in a plane parallel to the plane formed by the third element.

The first element is for example made of DC04 steel according to standard EN 10139.

Such a material makes it possible to easily bend the first part, for example by rolling.

The second element is for example made of pretreated steel such as a cold rolled spring steel, for example C60S according to standard NF EN 10132-4.

This material has good characteristics in terms of elastic deformation, while offering sufficient mechanical characteristics for the production of teeth.

The third element is made for example of DC04 steel according to standard EN 10139.

This material makes it possible in particular to easily obtain the third element by cutting a sheet.

The invention also relates to a clutch mechanism, in particular for a motor vehicle, comprising

- a fixed cover,

- a pressure plate movable axially relative to the cover,

- a movable diaphragm between a engaged position and a disengaged position, capable of actuating the movement of the pressure plate,

wear take-up means comprising at least one wear take-up member of the aforementioned type, axially interposed between the diaphragm and the pressure plate, the ramp of said member cooperating with a counter-ramp of the mechanism, so that that the rotation of the ramp relative to the counter-ramp modifies the axial distance between the diaphragm and the pressure plate, and means for driving in rotation the wear take-up member, said drive means in rotation comprising at least one endless screw meshing with the toothed zone of the wear take-up member.

The invention further relates to a clutch device comprising a clutch mechanism of the aforementioned type, characterized in that it comprises a reaction plate, a friction disc interposed axially between the pressure plate and the plate. reaction so as to be able to be clamped between the pressure plate and the reaction plate in the engaged position and so as to be able to be released in the disengaged position, the cover being fixed relative to the reaction plate.

The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of nonlimiting example with reference to the appended drawings in which:

FIG. 1 is an exploded perspective view of a clutch mechanism according to the invention,

FIG. 2 is a perspective view of the mechanism,

FIG. 3 is a perspective view, partially broken away, of the mechanism,

FIG. 4 is a view in axial section of the device,

FIG. 5 is a perspective view, from above, of a wear take-up member according to a first embodiment of the invention,

- Figure 6 is a top view of a strip forming the first member, before bending,

FIG. 7 is a view illustrating a second embodiment of the invention,

- Figure 8 is a top view of the strip forming the first element and the third element before shaping, here by bending and folding for example, of the take-up member of Figure 7.

Figures 1 to 6 show a clutch mechanism 1 with wear compensation according to a first embodiment of the invention. This comprises a fixed annular cover 2 of axis X, intended to be fixed on a reaction plate 3, a pressure plate 4 annular and movable along the axis X relative to the reaction plate 3 (FIG. 4) and at the cover

2. A friction disc 5 is intended to be interposed axially between the pressure plate 4 and the reaction plate 3.

The cover 2 has a generally hollow or bell shape. More particularly, the cover 2 comprises an annular part 6 extending generally radially and a generally cylindrical part 7 extending from the radially external periphery of the annular part 6. The free end of the cylindrical part 7 is fixed to the plate reaction 3, for example by riveting or screwing at the level of radial flanges 8 of the cover 2.

The pressure plate 4 is housed in the internal volume of the cover 2.

A diaphragm 9 is mounted in the internal volume, said diaphragm 9 comprising a deformable annular part 10, in the manner of a Belleville washer, from which actuating fingers 11 extend radially inwards. The radially inner periphery of the fingers 11 is able to cooperate with a clutch stop, as is known per se. The diaphragm 9 is mounted in abutment on the cover 2, at the support zones 12, and is kept in abutment on said zones 12 by means of hooks 13 which are fixed to the cover 2 by means of rivets 14 .

The diaphragm 9 is used to actuate the pressure plate 4 between a fully engaged position in which said pressure plate 4 is pushed towards the reaction plate 3, so as to enclose the friction disc 5 between said plates 3, 4, and a disengaged position in which said pressure plate 4 is spaced from the reaction plate 3 so as to release the friction disc 5. For this purpose, elastic tongues 15 capable of exerting an axial force connect the cover 2 and the plate pressure 4. The tongues 15 are arranged so as to resiliently return the pressure plate 4 to its disengaged position.

Wear take-up means are interposed axially between the pressure plate 4 and the diaphragm 9. More particularly, the diaphragm 9 cooperates with said wear take-up means in a zone located radially outside the zones of support 12 of said diaphragm 9 on cover 2.

These means comprise a wear take-up member 16 movable in rotation about the axis X, comprising a first element 17, a second element 18 and a third element 19.

The first element 17 comprises a cylindrical part 20 of axis X, comprising an axial end 21 against which the diaphragm 9 is intended to come to bear, and an axial end 22 comprising ramps 23 oblique to the radial plane and extending circumferentially, cooperating with associated counter-ramps 23a (FIG. 1), formed directly on the pressure plate 4. By way of example, the angle of each ramp 23 of the take-up member 16 and of the counter-ramp 23a associated with the pressure plate 4 is between 2 and 12 °.

The internal surface 24 of the cylindrical part 20 is able to cooperate with studs 25 of the pressure plate 4 so as to center the take-up member 16.

The first element 17 further comprises legs 26 extending radially outwards from the cylindrical part 20.

The legs 26 are bent at 90 ° relative to the cylindrical part

20.

The first element 17 is for example made of DC04 steel.

The second element 18 extends generally in a radial plane and comprises a middle portion 27 in the form of an arc of a circle of axis X, the radially outer edge of which comprises a toothed zone 28 carrying teeth 29. The toothed zone 28 of the middle portion 27 of the second element 18 forms a rack extending circumferentially, capable of cooperating with displacement means, described below, so as to be driven in rotation around the axis X, in the event of wear of the friction disc 5.

Said middle portion 27 further comprises, at its circumferential ends, connecting portions 30 extending radially inwards.

The connecting portions 30 of the second element 18 are fixed to the legs 26 of the first element 17, for example by rivets 31. Alternatively, other fixing means could be provided such as welding or bolting for example.

The second element 18 is located radially outside the first element 17.

The middle portion 27 of the second element 18 is separated from the first element 17 by at least one opening or at least one slot 32 in the form of an arc of a circle, of axis X. The circumferential ends of said opening or of said slot 32 are delimited by the connecting portions 30 extending radially. Alternatively, the middle portion 27 of the second element 18 can be separated from the first element 17 by a plurality of openings or a plurality of slots 32.

The middle portion 27 of the second element 18 extends angularly over an angular range of between 80 and 150 ° for example.

The second element 18 is elastically deformable in the axial direction.

The second element 18 is for example made of pretreated steel such as a cold rolled spring steel, for example of C60S.

The third element 19, called the balancing element, also extends in a radial plane and is diametrically opposite the second element 18 relative to the X axis.

The third element 19 has a middle portion 33 in the form of an arc of a circle with an axis X. Said middle portion 33 has, at its circumferential ends and in a central zone, connecting portions 34 extending radially towards the inside.

The connecting portions 34 of the third element 19 are fixed to the tabs 26 of the first element 17, for example by rivets 35. Alternatively, other fixing means could be provided such as welding or bolting for example.

The third element 19 is located radially outside the first element 17.

The middle portion 33 of the third element 19 is separated from the first element 17 by at least one opening or at least one slot 36 in the form of an arc of a circle, of axis X. The circumferential ends of said opening or of said slot 36 are delimited by the connecting portions 34 extending radially. As a variant, the middle portion 33 of the third element 19 can be separated from the first element 17 by a plurality of openings or a plurality of slots 36.

The middle portion 33 of the third element 19 extends angularly over an angular range of between 80 and 150 ° for example.

The third element 19 is made for example of DC04 steel.

The second element 18 and the third element 19 extend substantially in the same radial plane.

In a variant not shown, the second element 18 extends in a plane parallel to the plane formed by the third element 19, the two planes being offset axially.

The displacement means comprise an endless screw 37 held in mesh with the rack of the toothed area 28. The endless screw 37 is coupled in rotation to a ratchet wheel 38 cooperating with a pawl 39 comprising an actuating tab 40 of which the free end comes into engagement with the ratchet wheel 38 and the actuation of the free end of which is caused by wear of the friction disc 5.

The position of the ratchet wheel 38 relative to said free end of the lug 40 of the pawl 39 varies as a function of the wear of the friction disc 5 and of the position of the pressure plate 4, so that the pawl 39 is able to drive the ratchet wheel 38, in the event of wear of the friction disc 5, by displacement of the pressure plate 4 between its engaged and disengaged positions, as is known per se. The rotation of the ratchet wheel 38 thus results in the rotational movement of the take-up member 16 and therefore a modification of the axial distance between the support zone and the pressure plate 4, due to the presence of the ramp 23 and the counter ramp 23a. This variation in distance compensates for the wear of the friction disc 5 if necessary.

The ratchet wheel 38 and the worm screw 37 are pivotally mounted about an axis 41 (FIG. 1), the assembly being housed in a cassette 42. The cassette 42 is itself housed in a hollow area 43 formed in the cylindrical part 7 of the cover 2.

The toothed zone 28 is interposed axially between a radial base 44 of the cassette 42 and positioning lugs 45 of the cassette 42, so as to axially maintain in position the toothed zone 28 facing the axis of the worm 37 , so as to guarantee an optimal meshing. The toothed zone 28, due to its slightly curved shape and its axial elasticity, is held in a pre-stressed manner in abutment on the base 44. This guarantees the maintenance in axial position of the toothed zone 28 facing the axis of the worm screw 37.

The take-up member 16 according to a first embodiment illustrated in particular in FIGS. 5 and 6, is produced according to a manufacturing process comprising the steps consisting in:

a) cutting a strip 46 from a metal sheet, said strip having two ends 47,

b) bending or rolling said strip 46 then assembling the ends 47 of the strip 46 together by welding, so as to form the first annular element 17,

c) fixing the second element 18 on the first element 17, for example by riveting.

The cut strip 46 comprises, with respect to the axis of the strip 46, a first longitudinal edge 48, forming the axial end 21 of the first element 17, and a second longitudinal edge 49 forming the axial end 22. The second edge longitudinal 49 comprises at least one ramp 23 inclined relative to the longitudinal direction of the strip 46.

The rolling operation is a particular form of bending which makes it possible to shape, that is to say to bend the strip 46 in order to make the two ends 47 of the strip 46 match before the welding operation.

The weld zone 48, in which the ends 47 of the strip 46 are connected end to end, is located angularly between two ramps 23.

According to an embodiment illustrated in Figure 5, the weld zone 48 is located between the tabs 26 on which the second element is attached, for example by riveting.

Welding is for example of the laser welding type.

During step a), the strip 46 is cut so as to present the tabs 26 extending perpendicular to the longitudinal direction of the strip 46. The tabs 26 therefore come integrally with the rest of the strip 46 and s 'extend from the second longitudinal edge 22.

After cutting the strip 46, the tabs 26 are folded so as to extend radially outwards from the rest of the strip 46. This folding operation can take place before bending or, on the contrary, after bending.

The method further comprises a step prior to the step

c), during which the second element 18 and the third element 19 are cut from a sheet, this sheet being able to be of a different material for each of the three elements 17, 18, 19.

The third element 19 is then fixed to the legs 26 of the first element 17, for example by riveting.

FIGS. 7 and 8 illustrate a second embodiment of the take-up member 16 which differs from the member 16 illustrated in FIGS. 1 to 6 in that the third element 19 came integrally with the first element 17.

In other words, as can be seen in FIG. 8, the third element 19 comes integrally with the strip 46.

The method of manufacturing the member 16 according to the second embodiment therefore differs from that mentioned above in that after the bending, the third element 19 is folded, like the legs 26, so as to extend radially outward from the rest of strip 46.

The third element 19 could also be folded before bending.

In operation, the pressure plate 4 is moved axially between its engaged and disengaged positions, causing with it the axial displacement of the take-up member 16. The toothed zone 28, held axially, is therefore caused to be elastically deformed during displacement pressure plate 4.

The axial displacement of the pressure plate 4 between its engaged and disengaged positions is for example between 0.5 and 3 mm.

Claims (15)

1. Method for manufacturing a wear take-up member (16) for a clutch mechanism (1), in particular for a motor vehicle, comprising the steps consisting in: a) cutting a strip (46) from a metal sheet, said strip (46) having a first longitudinal edge (48) and a second longitudinal edge (49), relative to the axis of the strip (46), the second longitudinal edge (49) comprising at least one ramp (23) inclined relative to said longitudinal direction, said strip (46) comprising two ends (47), b) bending, for example by rolling, said strip (46) then assembling the ends (47) of the strip (46) together by welding, so as to form a first annular element (17), c) fixing a second element (18) on the first element (17), the second element (18) comprising a toothed zone (28). 2. Method according to claim 1, in which, during step a), the strip (46) is cut so as to have tabs (26) extending perpendicular to the longitudinal direction of the strip (46), said tabs (26) being folded so as to extend radially outward from the rest of the strip (46). 3. Method according to claim 2, wherein the tabs (26) are folded at 90 ° after the operation b) of bending the strip (46). 4. Method according to one of claims 1 to 3, wherein a third element (19), said balancing element, is fixed on the first element (17), the third element (19) being diametrically opposite the second element (18) relative to the X axis of the first annular element (17). 5. Method according to claims 2 and 4, wherein the second element (18) and / or the third element (19) are fixed to the legs (26) of the first element (17), for example by riveting. 6. Method according to claim 4, wherein the second element (18) and the third element (19) are obtained by cutting a sheet, the second element (18) and the third element (19) each having a shape d 'arc. 7. Method according to one of claims 4 or 6, wherein the third element (19) comes integrally with the strip (46), said third element (19) being folded so as to extend radially outwards relative to the rest of the strip (46) after bending said strip (46). 8. Wear take-up member (16) for a clutch mechanism (1), in particular for a motor vehicle, characterized in that it is obtained by the manufacturing process according to one of claims 1 to 7, said take-up member (16) comprising: - A first annular element (17) of axis X, one axial end (22) of which comprises at least one ramp (23) inclined relative to the radial plane, intended to cooperate with a counter-ramp (23a) of the clutch mechanism (1), the first element (17) being obtained by bending, for example by rolling, a strip (46) then welding the ends (47) of the strip (46) together, - a second element (18) comprising a toothed zone (28). 9. Body (16) according to claim 8, wherein the second element (18) is elastically deformable so as to allow the axial movement of the toothed area (28) relative to the ramp (23) of the first element (17) , by elastic deformation of the second element (18). 10. Body (16) according to claim 8 or 9, wherein the first element (17) has tabs (26) extending from the rest of the first annular element (17), radially outward. 11. Body (16) according to one of claims 8 to 10, in which it comprises a third element (19), said balancing element, fixed to the first element (17) and diametrically opposite the second element (18) by relative to the axis of the first element (17). 12. Body (16) according to one of claims 8 to 11, in which the second element (18) and / or the third element (19) are fixed to the tabs (26) of the first element (17), for example by riveting. 13. Body (16) according to claim 11 or 12, wherein the first element (17) and the third element (19) come in one piece. 14. Clutch mechanism (1), in particular for a motor vehicle, comprising - a fixed cover (2), - a pressure plate (4) movable axially relative to the cover (2), - a diaphragm (9) movable between a engaged position and a disengaged position, capable of actuating the movement of the pressure plate (4), - wear take-up means comprising at least one wear take-up member (16) according to one of claims 8 to 13, axially interposed between the diaphragm (9) and the pressure plate (4), the ramp (23) of said member (16) cooperating with a counter-ramp (23a) of the mechanism (1), so that the rotation of the ramp (23) relative to the counter-ramp (23a) modifies the axial distance between the diaphragm (9) and the pressure plate (4), and means for driving in rotation the wear take-up member (16), said means for driving in rotation comprising at least one worm (37) meshing with the toothed zone (28) of the wear take-up member (16). 15. Clutch device comprising a clutch mechanism (1) according to claim 14, characterized in that it comprises a reaction plate (3), a friction disc (5) interposed axially between the pressure plate ( 4) and the reaction plate (3) so that it can be clamped between the pressure plate (4) and the reaction plate (3) in the engaged position and so that it can be released in the disengaged position, the cover (2 ) being fixed relative to the reaction plate (3). 1/8