FR2738305A1 - MECHANICAL LOCKING SYSTEM FOR PARTS - Google Patents

Abstract

The invention relates to a system for mutual locking of two parts, which can be mounted or nested on one another. After the mutual engagement of the two parts (10, 13), they are centered by means of support zones (24, 22) formed on them and located radially facing each other, at least one (10) parts comprising a radial projection directed towards the second part (13), and which is provided with at least one radial recess, said projection and said recess being located radially in mutual superposition such that, after engagement , mutual, the radial projection either fits into the radial recess.

Description

The present invention relates to a mutual locking system of two

parts that can be mounted or

  nested with each other, in sets.

  Such locking systems are known with regard to bearings, for example according to the German utility model DE-69 45 830, where the inner ring of a bearing comprises, in view of an axial locking on a pin-shaped appendix, a zone engaged by rolling in a groove of the appendix. For this purpose, the inner ring must however consist of a plastically deformable material and be made of sheet metal. Such bearings, however, can only be used in particular applications. In addition, because of the usable material, the raceways have a low hardness. This process

is also relatively expensive.

  According to the German utility model DE-74 20 237, it is known a locking system o a bearing is held on a seat formed on a shaft, in that it is provided at the end of the seat a collar dimension enlarged with respect to the inner diameter of the inner ring and on which the inner ring is engaged. In this respect, a temperature difference between the parts is used for the assembly so as to engage the ring on the collar and to fix it on the seat by hooping. This is a relatively expensive process and unusable in general, especially since the bearing must be heated, which creates difficulties in relation to the grease

that it contains.

  The present invention aims to create a bearing locking means, acting in an axial direction mainly by conjugation of shapes, while having a small footprint and requiring no additional parts. The locking means according to the invention must also allow the assembly of the complete bearing and also, can be made in a simple and inexpensive way. Also, the working or assembly operations necessary for mounting or fixing the bearing must be able to be carried out in a manner

simple and. economic.

  According to the invention, this result. is.

  obtained by the fact that, for a blocking of two parts to mount or to axially fit one on the other, such as in particular, a piece at least of annular shape on another part or in a seat formed in this other room , the parts must be centered after the engagement operation via support zones that are. formed on it and which are located radially facing each other, at least one of the parts, in particular the annular piece and the other piece, having at least one radial projection to be directed towards the second piece and. this second piece having at least a radial recess, said projection and said recess, being arranged in superposition or overlap, so that, after the mutual engagement of the two parts, the radial projection comes to fit or lock in the radial recess. It may be particularly judicious that the protrusion is already formed on the corresponding part before engagement. or mounting the annular shaped piece on or in the seat of the second piece and is advantageously arranged to form a single and the same component with the corresponding piece. The radial projection can then be constituted by an annular bead. The radial recess can. instead be arranged in the form of an annular groove. The bearing areas can be created by mutually associated cylindrical peripheral surfaces of the two parts. For example, one of the peripheral surfaces may be constituted by the inner surface of a hole or sleeve or by the outer surface of a trunnion and the other peripheral surface may be constituted by the outer surface of a ring outer bearing or pad or the inner surface of a ring

Inner bearing.

  The locking systems arranged in accordance with the invention, however, are quite generally suitable for connecting two parts having zones which are nested axially in one another and which are

  positioned via support portions.

  The invention further relates to a method for mutually locking two axially engageable or axially mounted parts on each other, such as at least an approximately annular piece or another piece having an annular seat and In this respect, after the engagement operation, the two pieces are centered by means of support zones formed on them, located radially opposite one another and which advantageously have a profile. at least approximately cylindrical, and in addition at least one of the parts comprising at least one radial projection directed towards the other part and the latter comprising at least one radial recess, the latter and said projection being placed mutually in superposition, in which process, only in one part, forming the locking stroke, of all the axial engagement stroke, the radial projection of one of the parts and, where appropriate, adjacent zones this projection, as well as a part of the other piece, radially covering the projection and. operating in advance during assembly - considering the direction of mutual engagement of the parts - and where appropriate areas adjacent to that part are deformed at least in the elastically so that at the end of the race locking, the projection is interlocked or locked

in the recess.

  For the arrangement and function of the locking system, it may be particularly expedient for the regions of the protrusion and recess which are radially superimposed to extend axially opposite one another only on a surface. part of the total stroke of axial engagement and, mounting parts. It can thus be ensured that the mounting force necessary to produce a fitting of the projection in the recess must be exerted only for a small period. In addition, it is ensured that a comparatively large radial superposition of parts only occurs. on a small part of everything.e the axial mounting stroke, which promotes the axial deformation of at least one of the parts

  that is, necessary for the establishment of the blockage. -

  It can be particularly advantageous that the radial projection and. the radial recess are. formed on the axial extent of the seat and / or the annular shaped part so that the areas overlapping radially. mutually shall be moved over each other only over a short part of the total axial engagement stroke of the workpieces - that is, the locking stroke -. It may be particularly advisable to provide a protrusion and a recess in axial end regions of the axial parts of the parts to be engaged one on the other or one in the other as well as the elastic deformation ability of the parts, necessary in most applications, can be improved, and especially because of this. that the parts of the parts to be moved one on the other or one in the other can thus be deformed elastically over a greater axial length than the length of the projection. It may be particularly advisable that the recess be. provided in the part of one of the parts which operates in advance in the process of assembly or engagement and, that the protrusion is provided in the part which operates late in the other room. By the term "part operating in advance" is meant the part of a part which initially cooperates with the second part during assembly of the two parts. By the term "late operating part" in a room, is meant the part of this part which, when assembled with a second part, cooperates with a part of the second part only

  in the final phase of the engagement process.

  A locking system arranged in accordance with the invention can be used in a particularly advantageous manner in applications where the ring is made. a part of a bearing which consists of at least one inner ring and an outer ring having raceways for rolling bodies, at least one of the rings having a projection and / or a recess which, considering them, in an axial direction, are outside the range of the

corresponding tracks.

  According to an alternative embodiment of a locking system according to the invention, the inner ring of a bearing, which provides support for two parts that can rotate relative to each other, is. locked on a seat, arranged in the form of a journal, in one piece, the radial projection considered in the direction of assembly or mutual engagement of the two parts - which can be arranged in the area of the appendix or the seat which operates in delay during assembly while the recess can be arranged in the part of the ring

  which operates in advance during, editing.

  According to another possibility of arrangement. or another possibility of using a locking system according to the invention, the inner ring of a bearing, which provides support for two parts that can rotate relative to each other, is locked on a one-piece seat consisting of a shaped appendage

  of trunnion or sheath, the radial recess -

  considered in the direction of mutual engagement of the two parts - which may be located in the area of the appendage or the seat which operates in advance during assembly while the projection may be in the area of the ring

  interior that operates late during. mounting.

  In an embodiment where an outer race of a bearing, which positions two rotatable parts relative to each other, is held in a seat formed by a workpiece, it may be advantageous if the radial projection is located - considering the direction of mutual engagement of the two parts - in an area of one of the rooms that operates late and that the recess is located in-an area-of

  the outer ring that operates in advance.

  In devices o an outer ring

  of a bearing, which positions two parts that can.

  turn one relative. to the other, is held in a seat formed by a piece, such as a sheath-shaped component, the locking system according to the invention can be arranged or arranged so that the radial projection is located - considering the direction of mutual engagement of the two parts - in the part of the outer ring that operates late during assembly and that the recess is located in the area of one of the parts or the seat which operates in advance during

mounting.

  In structures where an outer ring of a bearing, which positions two parts rotatable relative to each other, is. received in a component, as a component in the form of a sleeve, it can be particularly judicious for a common insertion of the bearing. and the sleeve-shaped part in a seat of another part, arranging the locking system such that the radial recess is located - considering the direction of mutual engagement of the parts in the area of the component in question. sleeve shape which operates in advance during assembly and that the projection is located in an area of

headquarters operating late.

  In applications where an outer race of a bearing, which positions two rotatable parts relative to each other, is received in a workpiece, such as a sleeve-shaped workpiece, it may be advisable for insertion common of the bearing, and the sleeve-shaped part in a seat of another room, that the locking system is arranged and. arranged in such a way that the radial projection is located - considering the mutual interlocking direction of the parts in the region of the sleeve-shaped part which operates late and the recess is located in the area

  the seat of the other room that operates in advance.

  To facilitate assembly, in particular to reduce the maximum force required for the engagement of the projection during assembly, it may be particularly advisable for the protrusion - considered in the direction of engagement of the part comprising this projection on or in the corresponding seat. - is arranged in a wedge shape at least over a part of its extent and that its radial dimension is increased relative to the seat in the mounting direction of the part having the projection so that the radial overlap between the seat and, the projection increases. The angle of inclination of the wedge-shaped zones in a protrusion may have an order of magnitude between

  4 and 15, preferably between 5 and 10.

  Locking systems arranged in accordance with

  the invention can be used in quite a way.

  in the construction of machines. However they can. be used in a particularly judicious manner in what are called flywheels with two masses of inertia, including. both masses are supported via a bearing. so as to be able to

  turn relative to each other.

  Other features and advantages of the invention will be highlighted in the drawings, which show an arrangement according to the invention of the locking system for maintaining in an axially fixed condition of a bearing. centering the two masses of inertia of a steering wheel, drawings in which: - Figure 1 shows a sectional view of the flywheel with two masses of inertia, - Figure 2 represents an enlarged scale part of the area comprising FIG. 3 is an enlarged scale of a portion of the area comprising the rolling bearing, FIG. 4 is a graphical representation of the engagement force, FIG. 5 is a graphical representation of the clearance force, FIG. FIG. 6 represents another embodiment according to the invention, and FIG. 7 shows possibilities of arrangement of locking systems arranged in accordance with FIG.

the invention.

  The flywheel with two masses of inertia 1, represented

  in Figure 1, is divided into two elements 2 and 3.

  The flywheel element 2 can be fixed on a crankshaft, not shown, of an internal combustion engine, through the holes or passages 4 by means of fixing bolts 4a. The second flywheel member 3 can be coupled, via a friction clutch 6 controllable, to a transmission, not shown in detail, and it can be separated therefrom. Between the two flywheel elements 2 and 3, there is provided a device for damping torsional oscillations, which allows. a relative rotation between the two elements 2 and. 3, these being positioned coaxially via a bearing 5 so as to be able to

  turn relative to each other.

  The flywheel element 2, which constitutes the inlet portion of the damping device 7, forms a housing which delimits a chamber 8, annular in shape in a circumferential direction and in which at least a portion of the 7, in particular at least the helical springs 9 extending with a curved shape on the periphery. With regard to other features of construction and operation, reference is made to German patent applications DE-OS 44 14 584, DE-OS 41 17 579 and DE-OS 43 31 454. In embodiments of flywheels with two masses of inertia corresponding to this prior art, it is also possible to use bearings arranged in accordance with the invention. The content of this prior art must thus serve to explain the present invention and be considered as integrated therein. The element. 2 steering wheel located engine side has a component. 10, made of sheet metal in the embodiment shown and. which can be connected by bolting to the output shaft of an engine via the radial zone 11. The component 10 further forms an axially extending annular profile zone 12, and. which is located, in the exemplary embodiment shown, inside the holes 4 or

  fixing bolts 4a engaged therein.

  The inner ring 13 of the bearing 5 is fixed by fitting on the zone 12 in the form of sleeve or ring. The outer ring 14 of the bearing 5 is received in a recess or cylindrical hole 15 of the flywheel element 3, so that a fitting. is also created between hole 15 and the

bearing 5.

  As shown in FIG. 2, the single-row ball bearing 5 is arranged, with regard to the seal, the thermal insulation and the means for creating a reserve of lubricant, in a manner

  similar to what has been proposed in the patent application.

  German DE-42 14 655 and in this regard reference will be made to this document. The published content of this document must thus be considered as integrated in the present patent application. Figure 2 shows that the outer ring 14 of the bearing comprises a cap 16, which forms between the peripheral surface 15a of the receiving bore 15 and the outer peripheral surface 14a of the ring 14 of the bearing, an intermediate wall 17 which can be used thermal insulation to reduce heating. In addition, the cap 16 forms - on the side of the bearing, an additional lubrication volume 18 serving to receive a reserve of grease for bearings. Radially inside, the cap 16 has an axial zone 19 which is arranged axially, above or below a zone 20 of the inner ring 13 of the bearing and which forms with it a sealing zone . The axial zone 19, rotatable relative to the ring 13 of the bearing, forms with the radially opposite zones 20 of the ring 13 at least one seal, labyrinth seal. Advantageously, but nevertheless. at least in the new state of the axial zone 19, the bonnet 16 advantageously made of plastic material may be applied with a certain radial prestressing against the zone 20, which may be formed by a profiled portion 20 in the shape of a nose. On the side of the

  bearing, which is opposed to the cavity 18, it is.

  provided a sealing ring 21 which is supported by the outer ring 14 of the bearing and. which is radially applied inwardly against the inner ring 13 of the bearing. via sealing lips. Other operating characteristics, and arrangement, which can or are used judiciously in the bearing 5, have been implemented.

  obviousness in the aforementioned German patent application DE-

42 14 655.

  The inner ring 13 has an inner peripheral surface 22, which is fitted by fitting and / or by friction on the outer peripheral surface 24 of the seat 25 created by the sleeve-shaped area 12. For mounting the bearing 5, it is engaged on the seat 25 in the direction of

the arrow 26.

  Under the effect of the temperature drop occurring during operation of the device or the flywheel, with two masses of inertia 1 and also under the effect of the axial forces generated, in particular between the ring 13 and the appendix 12, he can. the fastening established by fitting and / or by hooping between the ring 13 and the appendage 12 is not sufficient to prevent sliding escapement of the bearing 5 and consequently of the steering wheel element. this, according to the invention is provided additional locking means 27, which will be described in more detail

in relation with Figure 3.

  The locking means 27 comprise a zone 28 widened in diameter relative to the outer cylindrical peripheral surface 24 of the appendix 12 and which constitutes a projection 29 of annular shape. In

  the illustrated embodiment, the projection 29 -

  considered in the engagement direction 26 of the ring 13 on the appendix 12 - is located in the end zone or at the end of the outer peripheral surface 24 of the appendix 12. It is provided axially. following the elevation formed by the ring-shaped projection 29 a stripped area or recess 30, which is here created by an annular groove 30. Following the recess 30, the component 10 has a shoulder 31 oriented radially and acting as a stop to limit the axial movement of the ring 13 in the direction of the arrow 26. The ring 13 can bear against this shoulder 31 through his

frontal surface 32.

  The locking means 27 further comprise an axial bearing zone 33, which cooperates with the axial counter-support zone 34 constituted by the projection 29 so as to prevent, by means of a support or a link. mainly by conjugation of shape, an axial spacing of the ring 13 relative to the appendix 12 by sliding. The inner diameter 35 delimiting the axial bearing zone 33 has in the embodiment shown essentially the same diameter as that of the annular peripheral surface 22. These two diameters should be at least approximately equal and this

  regard, depending on the intended application, it may.

  it is advisable that the inside diameter delimiting the axial bearing zone 33 is. slightly smaller. or larger than the outside diameter of the peripheral surface 24 of the appendix 12. When such a difference in diameter exists, it may be

  the order of magnitude between 0.01 and 0.05 mm.

  The axial bearing zone 33 is formed by creating a recess or a recess. 36 in an area of the inner cylindrical peripheral surface 24, initially continuous, of the ring 13. The recess 36 is provided in the portion 37 of the ring 13 which initially comes into contact with the appendix 12 at the engagement. , of this ring 13 on the appendix. Due to the provision, in accordance with the invention, of the clearance 36 and the projection 29 radially engaging therein, an axial interlocking of shapes between the components 10 and the ring 13 occurs in the final phase of the engagement movement of the ring 13 on the appendix 12, which avoids damage to the bearing zones 33 and 34 cooperating with one another.

with the other.

  In order to reduce the press-fitting or press-fitting forces, the projection 29 is arranged, at least over part of its axial extent, so that its height is gradually changed in the direction of the arrow 26. At this point, the projection 29 is arranged at least in part of its axial extent. Indeed, it is possible, as indicated at 38, for the projection 29 - considered in section - to be widened in the shape of a wedge in the direction of the arrow 26. The angle of inclination 39 of the surface 38, widening with a conical profile, the projection 29 may be of the order of magnitude of between 4 and preferably of the order of magnitude between 5 and 10. In the exemplary embodiment shown,

  the angle of inclination 39 is about 8.

  When the diameter of the peripheral surfaces 22,24 is of the order of magnitude of between 30 mm and mm, it is advisable that the overlap. or radial superposition 40 between the surfaces created by the bearing zones 33 and 34 is of the order of magnitude between 0.03 and 0.08 mm. This overlap can, however. to be too. bigger. In practice, he has. proved advantageous, in the case where the peripheral surfaces 22,24 have a diameter of about 34 mm, to have an overlap 40 of the order of magnitude

about 0.04 mm.

  As the figures show, in the example

  embodiment shown, the locking means 27 -

  considered in an axial direction - are located outside the axial extent of the race 41 of the balls 42 of the bearing 5. It is thus ensured that, when mounting the bearing, 5 on the appendix 12, the inner ring 13 of this bearing is not affected in the area of the balls 42 or the race 41, by a radial elastic expansion or undergoes only a very small expansion, which allows to avoid damage to the bearing. The balls 42 and / or at least the raceway 41 must not be

  engaged axially on the projection 29.

  To facilitate this engagement of the ring 13 on the appendix 12, the ring 13 comprises, on its end zone directed towards the shoulder 31, a bevel 43 which extends substantially directly to the axial zone

support 33.

  When fitting the bearing 5 or the ring 13 to the appendix 12, the corresponding components 13 may have at least the same temperature. However, it may also be wise that, during assembly, there is at least a negative temperature difference between appendix 12 and ring 13, which means that appendix 12 may have a temperature smaller than that of This result can be obtained by means of a cooling of the zone 12 or the component 10 and / or by means of a heating of the ring 13 or of the bearing 5 or of the assembly comprising this bearing. . Under the effect of such a difference in temperature, the forces required for engagement, the ring 13 on the appendix 12 can be reduced because the radial overlap between

  the corresponding diameters are decreased.

  When mounting bearing 5 on the component.

  , the ring 13 comes to apply initially against

  the free end 44 (Figure 2) of Appendix 12.

  The free end 44 is then arranged with a sharp edge so that the effective contact surface

  between the peripheral surfaces 22 and 24 is increased.

  As the axial overlap between the peripheral surfaces 22 and 24 increases, the force required

  Pressure fitting also increases.

  gradually but however, this increase is. smaller than the one that is. necessary for the area

  support 33 engages axially on the projection 29.

  As soon as the bevel 43 comes to bear against the surface 38 widening with a conical profile, the axial bearing zone 33 moves along the surface 38 and it follows that, because. of the own elasticity of the components 13 and 10 or the appendix 12, there is a change in the diameter of said parts, fate-e that the bearing zone 33 can engage axially. on the annular appendix 29 and that this appendix 29 is placed in the recess or in the recess 36. When the projection 29 is. exceeded by the bearing zone 33, the elastically deformed zones of the parts 13 and. 10 are withdrawn so that the bearing zone 33 and. the abutment zone 34 formed by the projection 29 overlaps radially for a short distance, thereby establishing an axially axially locking, and essentially formed by a form-locking connection. The bearing zone 33 thus clings behind the projection 29 or the projection 29 fits into the undercut 36, which establishes a

  axial locking between the components 10,13.

  A curve typically representing the necessary force of fitting to exert for the ring 13 or the bearing 5 has been shown in FIG. 4. This Figure shows that, in the first partial zone 44a, which has a progressing length in the essential until When the bevel 43 is applied against the conical surface 38, the necessary press-fitting force increases comparatively little. It is. only to absorb the protrusion 29 a much greater pushing force is necessary to increase this force to the point. 45. When passing, point 45, which corresponds to the point of attachment, that is to say at the point where the bearing zones 33 and 34 are hooked radially into each other under the effect of an elastic retraction, the force of fitting shrinks again sharply. and, during a continuation of the fitting movement of the ring 13 in the direction of the arrow 26 (FIG. 3), a sudden increase in force is again generated, which is generated by abutment of the front surface 32 of the bearing ring 13 against the shoulder 31. From this. moment, the process

  fitting. by pressure is finished.

  As shown in Figure 3, it is advantageous because of the necessary manufacturing tolerances that, when the abutment of the front surface 32 against the shoulder 31, there is a small clearance 46 between the bearing surfaces 33,34 located axially one facing

the other.

  The diagram shown in FIG. 5 shows that the maximum force 45a necessary to release the bearing 45 or the ring 13 from the axial appendix 12 rises, due to the prediction of the locking means 27, to a multiple of the axial force that is. necessary to overcome the connection which is established by compression or by hooping between the peripheral surfaces 22 and, 24. In the embodiment shown, the locking means 27 - considered in the direction 26

  of fitting of the ring 13 of the bearing - are.

  disposed at the end or in the extreme zone of the peripheral surfaces 22,24 or of the appendix 12 and the ring 13. Such locking means may, however, be arranged in any place

  the axial extent of the appendage 12 or the ring 13.

  As is shown in connection with the diagram of FIG. 4, when the locking means 27 are shifted to the right by considering FIG. 3, the part of the fitting stroke in FIG. which occurs a large fitting force in correspondence to point 45 of Figure 4, can then be elongated in correspondence, which can be a disadvantage in many applications. In addition, it is possible to provide, over the length of the appendage 12 or the ring 13, several zones

  comprising corresponding locking means 27. -

  Also, it is possible to provide on the bearing ring a protrusion equivalent to the projection 29, in which case the appendix 12 has an equivalent clearance. functionally at the draft 36. With such an arrangement or arrangement. blocking means, it is then advisable that they are arranged in the zone of the free end 44 (Figure 2) of the appendix 12 or the peripheral surface 24 because then we can also be assured that the force of corresponding increased fit. on point. 45 of Figure 4 is exerted only in the final phase of the process of fitting the ring 13 to the appendix 12. Such an arrangement of the locking means can also be combined with an arrangement according to the Figures

described above.

  Figure 3 shows other locking means 46 which intervene for an axial locking of the outer race 14 of the bearing relative to the flywheel element 3. As can be seen, the hole 15 or its peripheral surface 15a - considered in an axial direction - are divided into zones having different diameters. The small diameter 47 is then located in an area of the open end portion of the hole 15. The large diameter 48 of the bore 15 is located, considering the direction 49 of fitting of the bearing 5 in the bore 15 axially after the small diameter 47 and at this. In this embodiment, there is provided, in the exemplary embodiment shown, a transition zone 50 which widens, with a profile

  conical in the direction of the arrow 49.

  The receiving bore 15 has in the zone of its open end and, following the diameter 47, an engagement chamfer 51. The bore 15 extends with the large diameter 48 at least in the axial zone of the ring 14, which is in direct contact with the cap 16. An end of this area has been designated 52. In FIG. 3, the end zone 53 of the portion 16a of the cap 16 which is shaped sheath and. which hangs on or around the bearing has been shown in the relaxed state. It is, however, actually in the mounting state that is represented that the end zone 53 is forced radially inwards or pivotally displaced by the action of the radial projection 54 of circular shape, which is located at following the small, diameter 47. The overlap shown in Figure 3 is not produced. After mounting the bearing, 5

  in the receptacle 15, the layer 21a of the seal.

  watertight 21, made of a flexible material, is deformed at least elastically. This layer can. be made of a plastic material, such as a

elastomeric material.

  The radial height 56 of the projection 54 is dimensioned such that the bearing assembly constituted by the bearing 5, the cap 16 and the seal 21 can be fitted into the bore 15 because of the possibility of deformation. elastic of the different components. The mounting of the bearing 5 or the bearing assembly in the bore 15 can be carried out at room temperature or at temperatures of

  at least approximately equal parts but it is.

  however. possible and also judicious, as has already been described in connection with the engagement of the ring 13 on the appendix 12, to be able to reduce the necessary fitting forces by heating or cooling. corresponding parts. For example, room 3 can be heated and / or all

  bearing bearing 5 can be cooled.

  It is advisable for the mounting of the bearing assembly that it is initially mounted on the flywheel element 3 and is then engaged, in conjunction

  with it, on component 10 or on appendix 12-.

  By heating or cooling the corresponding components during assembly, that is to say by using temperature differences between the components to be mounted, it is possible to increase the radial dimensional overlap of the corresponding blocking means, which allows still obtain an increase in axial blockage. The use of temperature differences when mounting the corresponding components can, however, also be exploited to reduce the possibility of elastic deformation, necessary for mounting, of at least one of the ten components, so that one can rest assured that at least

  it is not damaged during assembly. That is.

  particularly advantageous when engaging the bearing assembly, comprising the bearing. 5, in the hole 15 because, for many applications, is used for the manufacture of the cap 16 a relatively fragile or hard plastic material which, because of its small thickness in the region of the bore 15, has only one

  low ability of radial internal deformation.

  FIG. 6 represents another possible application of the locking system according to the invention, in particular between the bearing cap 116 and the component 103. The component 103 comprises, in a manner analogous to that shown in FIGS. 1 to 3 for the second flywheel element 3, a hole or a bore 115 of circular shape for receiving the bearing assembly 105a comprising the bearing 105. The bearing assembly 105a is arranged, independently of the locking means 146, which must prevent an escape. by sliding the bearing assembly 105a axially out of its receptacle 115 in a manner analogous to the bearing assembly according to Figures 1 to 3. The bearing assembly a may, however, have another structure and. another provision. The locking means 146 are arranged in an analogous manner and act in the same way as the blocking means 27 of FIGS. 2 and 3. These locking means 146 comprise a radial projection 129, provided on the end portion 153, directed towards the open side of the bore 115, the zone 116a of the cap 116 which is in the form of a sleeve and. which surrounds the bearing 105, this projection 129 being engaged radially in an annular recess 136 of the component 103. The recess 136 or the stripped area 136 is. provided in an area of the open end of the bore 115, from which the bearing assembly 015a is engaged in this bore 115. It is provided after the recess 136, towards the open side of the bore 115 115, a bearing zone 133 which cooperates with the axial abutment zone 134, formed by the projection 129, so as to establish a connection, essentially by conjugation of shapes, between the cap 116 and the component 103, and in a manner analogous to that described in relation to the support zones 33, 34 or with the projection 29 and the

recess 36.

  The dimension 140 of the radial overlap between the bearing areas 134, 135 may have the same order of magnitude as has been defined in relation to the locking means 27 of FIGS. 2 and 3. However, in fact. that the sleeve-shaped portion 116a of the cap 116 has a comparatively long end zone 154 and which does not apply against the outer peripheral surface 114a of the outer ring 114, but which protrudes axially from this peripheral surface 114a towards the open end of the bore 115, and furthermore that there is provided radially within this end zone 154 a flexible layer 157, of elastomeric material, of the seal 121, the overlap or overlap 140 can also be chosen larger because in particular, the area 154 of the hat 116 which is. located opposite the peripheral surface 114a of the outer ring 114 of the bearing may be elastically deformed. of a degree determined in a manner analogous to a beam working with bending. Thus, for example, for a diameter 115Sa of the bore 115 which is of an order of magnitude of between 40 and. 60 mm, the overlap, or overlap 140 may have a dimension of an order of magnitude of between 0.1 and 0.2 mm. As has already been pointed out, this overlap, however, can be, also, smaller. Depending on the application

  However, this overlap may, however, be equally

  bigger. That is. in particular function of the possibility of radial deformation of the end zone 154, which is again a function of the dimensioning of this extreme zone. To increase the radial elasticity or the elastic deformability of the sheath-shaped zone 116a, at least in this end portion 154, it is. possible to predict - considering. the periphery of the sheath-shaped portion 116a - and. at least in part of the extent of the end zone 154 or at least in part of the axial extent of the sleeve-like zone 116a, slots oriented in an axial direction and at this point. regard it makes sense

  to provide at least two slots. Advantageously, it is.

  however possible to also provide more slots,

for example from three to ten.

  The engagement of the bearing assembly O1Sa in the bore 115 can be carried out in a manner analogous to that described with reference to FIGS. 2 and 3 for the installation of the inner ring 13 of the bearing. on Appendix 12 or for the engagement of the bearing assembly bearing the bearing 5 in

the bore 15.

  Although it is particularly advantageous that, as shown in Figure 6, the locking means 146 - considered in the direction of engagement, of

  the bearing assembly 105a in the bore 115 - are.

  provided in the initial zone, that is to say on the open side, the bore 115 or on the end zone 153, directed towards this open end, the component to engage, as the cap 116, the locking means The aforementioned 146 may also be arranged in another location, as has been also. explained in relation to Figures 2 and 3. It would also be possible to shift the blocking means 146 to the right, in which case the radial overlap 140 between the corresponding bearing areas should be adapted to the existing elastic deformation capabilities of the components correspondents. The locking means 146 may also be provided on the other end zone of the sleeve-shaped portion 116a and in particular at the location designated 60 in FIG. 7 and in this respect it may however be judicious to provide in the area of the bore 115 of the component. 103 a protrusion functionally equivalent to the projection 129, and to ensure that the sleeve-shaped portion 116a, or the cap 116, has a recess cooperating with the protrusion

  and creating or delimiting a corresponding support zone.

  Various points 58, 59, 60, 61, 62 have been indicated in FIG. 7, in the zone of which a blocking system according to the invention can be provided in a particularly advantageous manner because, in these points, it is possible to ensured that the locking means come into action in the final phase of engagement between the two corresponding components. We are. so assured

  that, only. on a short distance of movement.

  relative axial required between the two corresponding components, a force of engagement or fitting

increased is required.

  The locking system corresponding to point 61 is arranged such that an inner ring of a bearing, which supports two rotatable parts relative to one another, is locked on a formed seat.

  by a trunnion and that the radial recess -

  considered in the direction of mutual engagement of the two parts - is located in a zone of the trunnion which operates in advance while the projection is. located in an area

  the inner ring that operates late.

  The corresponding locking system. at point 59 is. then advantageously arranged such that an outer ring of a bearing, which supports two parts that can rotate relative to one another. to the other, be locked in a seat formed by a piece and. that the radial projection - considered in the direction of mutual engagement of the two parts - is located in an area of the workpiece that operates late while the recess is located in an area of the outer ring which operates in advance. The blocking system corresponding to the point 58 may advantageously be arranged such that an outer ring of a bearing, which supports two parts which can rotate relative to each other, is locked in a seat created by a part , like a piece in the shape of a scabbard and. that the radial projection - considered

  in the direction of mutual engagement of the two parts -

  is located in an area of the outer ring that operates late while the recess is located in an area of the workpiece that operates in advance, the locking system operatively operating relative to the parts nested axially in one another as indicated on

Figure 6.

  The locking system corresponding to the point. 60 may advantageously be arranged such that u-n outer ring of a bearing, which supports two parts rotatable relative to each other, ie. received in a component, such as a component shaped like

  sheath, with a view to the common insertion of the bearing and.

  of the sheath-shaped component in a seat of the other part, the radial recess - considered in the direction of mutual engagement of the parts - being. located in an area of the sheath-shaped component that operates in advance while the protrusion is. located in an area

the seat that operates late.

  The provision of a protrusion and a recess can advantageously be achieved in a manner analogous to that provided for in point 60, which means that the recess is provided on the cap 16 and that the

  projection is provided on part 3.

  Patent claims filed with

  this patent application are. drafting proposals without any effect. detrimental to the subsequent obtaining of patent protection. The Applicant reserves the right to claim further particularities

  defined until now only. in the description

and / or the drawings.

  The attachments. adopted in the

  secondary claims relate to each other

  adapting the subject matter of the main claim by the features of the corresponding secondary claim; they should not be regarded as a prohibition on obtaining independent protection with regard to the particularities of

  ancillary claims attached.

  The objects of these secondary claims

  however, they also constitute separate inventions, which relates to an arrangement. independent of the objects of the

  previous secondary claims.

  The invention is not limited to the described embodiments. On the contrary, in the context of the invention, many modifications and. variations are possible and, in particular variants, elements and combinations and / or materials, which are inventive for example by combination or modification of certain particularities or elements, or defined operating stages

  in the general description and the claims and

  contained in the drawings and lead, by a combination of features, to a new object or to new operating steps, or to new sequences of operating steps, may also relate to manufacturing processes, control and work.

Claims (18)

  A mutual locking system of two parts which can be engaged axially on one another, such as a piece, at least approximately, of annular shape, on or in a seat, arranged in a similar manner, of a another piece, in which system after engagement, mutual, the two parts are centered by means of support zones, formed on them and located radially facing each other, at least one of the parts comprises at least one radial projection directed towards the second piece and said second piece comprises at least one radial recess, said protrusion and said recess being mutually located in radial superposition such that, after the mutual engagement, the radial protrusion is , nested in the radial recess.   2. Blocking system according to claim 1, characterized in that the radial projection is a bead, ring-shaped.   3. Blocking system according to one of   1 or 2, characterized in that the   Radial recess is a ring-shaped groove.   4. A method for locking two axially engageable parts to one another, such as at least an approximately annular piece on or in an annular seat of another part, in which, after the engagement , mutual parts, the two parts are centered by means of bearing zones formed on them and located radially facing each other, at least one of the parts having at least one radial projection to be directed towards the another piece and, this other piece having at least one radial recess, the latter and; said protrusion being mutually superposed, in which process, in only one part, forming the locking path, of the entire engagement path; axial, the radial projection of one of the pieces, and; where appropriate, areas adjacent to this projection, and a part of the other part which operates in advance - considering the direction of mutual engagement of the parts - and which covers the projection radially, and where appropriate; areas adjacent to said portion are elastically deformed such that at the end of the locking stroke the projection is nested and locked in the recess. 5. Blocking system according to one of   Claims 1 to 3 and method according to the claim   4, characterized in that the mutually overlapping areas of the protrusion and recess are axially facing each other only over a portion of the entire race. axial engagement of the parts.   6. Blocking system according to one of   Claims 1 to 5, characterized in that the projection   radial and radial recess are arranged on the axial extent of the seat and / or the annular-shaped component such that the radially overlapping areas are displaced with respect to each other only on a short part, that is to say, corresponding; at the locking stroke - all the engagement stroke, axial mutual parts. 7. Locking system according to one of   claims i to 6, characterized in that the projection   and the recess are arranged in extreme axial zones of the axial parts of the parts which are   movable one on the other or one in the other.   8. Locking system according to one of   Claims I to 7, characterized in that the   recess is provided in the area of one of the rooms that operates in advance in the process of mutual engagement while the protrusion is provided in the area of the other piece that operates late.   9. Locking system according to one of   Claims 1 to 8, characterized in that the coin   annular form is part of a bearing, consisting of at least one inner ring and, an outer ring having rolling tracks for rolling members, at least one of the rings having a projection and / or a recess which is located, considering, in an axial direction, outside the extent of the track of corresponding bearing.   10. Locking system according to one of   Claims 1 to 9, where an inner ring of a   bearing, which supports two parts rotatable relative to each other, is locked on a seat constituted by a trunnion and o the radial projection considered in the direction of mutual engagement of the two parts - is; located in a tourillo area operating late while the recess is located   in an area of the inner ring operating in advance.   11. Locking system according to one of   1 to 10, where an inner ring of a   bearing, which supports two parts that can rotate relative to each other, is blocked on a seat   formed by a trunnion and o the radial recess -   considered in the direction of mutual engagement of the two pieces is located in an area of the pin which operates in advance while the projection is located in a zone of   the inner ring that operates late.   12. Locking system according to one of   Claims 1 to 11, where an outer ring of a   bearing, which supports two parts that can rotate relative to each other, is locked in a seat   formed by a piece and o the radial projection -   considered in the commitment direction; mutuel of the two pieces - is located in an area of the room that operates late while the recess is located in an area of the outer ring that operates in advance. 13. Blocking system (58) according to one of   Claims 1 to 12, where an outer ring of a   bearing, which supports two parts that can rotate relative to one another; to the other, is; locked in a seat created by a workpiece, such as a barrel-shaped piece and where the radial projection - considered in the direction of mutual engagement of the two pieces - is located in an area of the outer ring that operates late while the recess is; located in a zone of the part that operates in advance.   14. Locking system according to one of   1 to 13, where an outer ring of a   bearing, which supports two rotatable parts relative to each other, is received in a component, such as a barrel-shaped component, for joint insertion of the bearing and the sheath-shaped component into a seat of the other part, the radial recess considered in the direction of mutual engagement of the parts - being located in an area of the sheath-shaped component which operates in advance while the projection is located in an area of the headquarters operating late.   15. Locking system according to one of   Claims 1 to 14, where an outer ring of a   bearing, which supports two rotatable parts relative to each other, is received in a component such as a barrel-shaped component, for joint insertion of the bearing, and the sheath-shaped component in a seat of another part and o the radial projection considered in the direction of mutual engagement of the parts - is located in a zone of the sheath-shaped component which operates late while the recess is located in the zone   the seat of the other room that operates in advance.   16. Locking system according to one of   claims i to 15, characterized in that the projection   - considered in the direction of engagement of the part having on or in the seat - is arranged in the form of a wedge at least over a part of its extent and its dimension increases in a direct radial direction relative to the seat in the direction of assembly of the room having the projection.   17. Locking system according to one of   Claims 1 to 16, characterized in that the angle   tilting areas of the projection that are shaped wedge-shaped is of the order of magnitude included   between 4 and 15, preferably between 5 and 10.   18. An assembly comprising a locking system, characterized in that it is constituted by a flywheel with two masses of inertia, the two masses of which are mounted so as to be rotatable relative to each other by the intermediate of a bearing comprising a system   blocking device according to at least one of claims 1 to 17.