FR2610376A1 - HOMOCINETIC SEAL, IN PARTICULAR FOR MOTOR VEHICLES - Google Patents

Abstract

THIS HOMOKINETIC JOINT IS MADE CAPABLE OF DECOUPLING THE AXIAL VIBRATIONS THANKS TO THE INTEGRATION OF AN ELASTIC ELEMENT. THIS ELEMENT IS CONSTITUTED BY A SLEEVE WITH LONGITUDINAL ELASTICITY, CAPABLE OF TRANSMITTING TORQUE AND ABSORBING THE RELATIVE AXIAL MOVEMENTS BETWEEN THE EXTERIOR ELEMENT 6 OF THE SEAL AND THE PIN 10 FIXED TO THIS ELEMENT. GUIDING AND SUPPORTING MEANS 28, 29, 30 OPPOSE THE RELATIVE TILT MOVEMENTS BETWEEN ELEMENTS 6 AND 10. FOR EXAMPLE, A FREE SHAFT 30 IN LONGITUDINAL TRANSLATION IN A SHAFT 10 END AND A BELL 29 CONNECTED TO THE EXTERIOR ELEMENT 6 OF THE SEAL, AND JOINT TO THE SHAFT 30.

Description

2610 3 7 6

  The invention relates to a constant velocity joint.

  that comprising two half-joints and intended to establish an elastic connection in the axial direction between two parts of a shaft. An application for seals of this type is in the area of the cinematic chain.

  than motor vehicles. In this case, it is desired

  table to decouple axial vibrations on the longitudinal drive shafts and, in particular, on the wheel half-shafts, to reduce the vibrations transmitted to the body; gold, sliding joints or

  spline joints cannot ensure full-

  this decoupling when subjected to stress

  te of the torque, due to the axial stiffening of the chain

  no kinematics which is established under this constraint. The

  rubber coupling seals provided for this application

  are flexible in rotation and do not provide

  no flexion support, i.e. they are unable to

  to oppose a radial misalignment between the two

parts of the tree.

  It is possible to obtain a reduction or a

  decoupling of these vibrations using seals

  smoothing with smooth translation which in particular ensure attenuation of noise at low frequencies. At higher frequencies, this decoupling of vibrations in the kinematic chain is not entirely ensured,

  so that the vehicle body is vibrated

  tion. Under load, the resistance to axial sliding in the constant velocity joints increases, so that the kinematic chain stiffens in the axial direction, and the decoupling of vibrations in the joints

sliding is then incomplete.

  The object of the invention is to produce a constant velocity joint intended to provide a rigid connection in bending and rigid in torsion between two parts of a

  tree and which allows, with simple means, to achieve

  be an axial elasticity which is suitable for the

vibration coupling.

  A first solution according to the invention is

  consisting of a constant velocity joint comprising a dis-

  that of the membrane type which represents an elastic bond

  longitudinal city between an annular element of the joint

  and a joint pin connected to this annular element.

  A second solution, equivalent to the first, consists of a constant velocity joint which includes a

  perforated sleeve, with longitudinal elasticity, which represents

  te a connection between an annular external element of the

  joint and a joint pin connected thereto.

  With the solution according to the invention, an element

  of the joint is elastic in the longitudinal direction.

  This element is preferably the external element of the

  joint and, although it has a great capacity for trans-

  mission of the couple, it is of a flexible constitution in

  the axial direction, so that it decouples advantageously-

  axial vibrations. With special measures,

  we can make sure that the buckling of the elastic part

  joint tick to the right of the connecting element either

  fully deleted when this part is loaded by

a couple.

  An advantageous embodiment of the first of the two equivalent solutions consists in that the diaphragm-type disc is interposed between two abutment elements rigidly integral with the joint pin or with the external element of the

  seal, which form axial stops and which represent

  try angular limits and, in this way, avoid destruction of the disc during walking. As additional protection for the flexible disc, it

  can be provided with longitudinal stops and tor-

  corresponding zion, which limit the displacements

  excessive axial as well as ex torsional movements

stops.

  An advantageous embodiment of the disc

  - tyoe membrane is represented by a simple circular sheet-

  cular provided with slots, which can be in particular

  in the shape of a circular or radial arc, and the present

  this enlarges the possibilities of variation of the axial length of the constant velocity joint with a disc diameter

relatively Detit.

  An improvement to the construction described above can consist in the fact that there are provided, between the rigid abutment elements and the disc of the tyoe membrane, elastic elements, in particular,

  rubber or plastic parts which absorb

  bent and absorb blows and bumps. The elastic elements are furthermore suitable for establishing at a particular value the damping property of the

  constant velocity joint according to the invention.

  Another improvement is characterized in that at least one half-joint comprises two elements which are connected to one another by two discs of the membrane type, having the form of annular discs and mounted perpendicular to the axis of rotation and at a certain mutual axial spacing, these discs

  being fixed to the first element by their interior region

  superior and to the second element by their exterior region

re.

  The effect of this element is that, thanks to

  this at the axial spacing of the diaphragm type discs, the two elements of the respective half-joints are joined

  to each other by a rigid torsional connection

  without any particular guide or support means, at the same time as it is possible to establish a high axial elasticity of the joint thanks to a movement without

  mechanical friction. From a construction perspective

  tion, the mechanism is simple and inexpensive. According to one

  first embodiment, it is possible to load

  qer the two diaphragm type discs by the couple

  that it is a question of transmitting Dar a riaide connection in ro-

  tation, in which case the discs are mounted in parallel under the aspect of the transmission of forces,

  so that each of the tyoe membrane discs trans-

  puts half the couple. However, apart from this mon-

  tage, there is also the possibility of transmitting the entire torque by one of the two diaphragm type discs, while the second diaphragm type disc is decoupled in rotation and transmits only axial and substantially radial forces under constraint

  torsional with respect to the elements of the half-joints.

  The axial deformation of discs of the mem-

  brane can be limited by a rigid or elastic element

  that interposed, in which case, by sparing a game aDpDro-

  required, a work interval can be established

  both reduced axial force absorption in the presence

  small amplitudes. In this construction, an ele

  elastic may be provided to limit the travel of

  axial translation with shock absorption in bu-

  tee. The discs of the membrane type are preferably produced in the form of annular discs which may have slots in an arc of a circle or radial to increase their axial deformability. The slits can also extend to the outer edge, so

  that we get star disks.

  According to another advantageous configuration, the discs of the membrane type may have sheet metal strips which intersect like the spokes of a wheel,

  which are substantially contained in a radial plane, au-

  which case, in the presence of a couple, one or the other of the halves of these elements is called upon mainly to

  traction, depending on the direction. Here, a characteristic is-

  sential consists in axial flexibility with a

  high rigidity in the circumferential direction

  diale. An advantageous form of construction of the second

  th of the two equivalent solutions which includes a man-

  elastic lonqitudinal direction consists in that this sleeve is composed of solid parts which

  intersect, forming angles of 45 with the genera

  trices, the basic cylindrical shape being perforated by square or diamond-shaped regions. Another embodiment consists of

  that the longitudinally elastic sleeve has more

  rows of circumferential slots offset from one another and which allow large

variations in sleeve length.

  In the above embodiments,

  can also provide elastic rubber elements

  chouc or plastic material interposed between the rigid elements, that is to say between the joint pin and

  the outer element of the seal; in another possibility

  construction tee, one can also provide such

  material between the solid parts of the anchor.

  Flaming can be effectively prevented

  age of the seal in the region of the diaphragm type disc by providing stop elements with a small spacing

  mutual on the external element of the seal and on the turret

  lon of the joint. The elastic sleeve in the long direction

  gitudinal can be fitted with a rigid stop element

  located inside the sleeve and which is rigidly connected

  ment to the inner element of the joint or to the joint pin and which is disposed at a small axial and radial spacing from a stop element carried by the other element of the joint. Also in this way, we get support

  opposing buckling, so that destruction is avoided

tion of the elastic sleeve.

  Outside the inner or outer sleeves

  mentioned above, other movable guide means in transla-

  axially relative to each other, especially

  Tees in the form of sleeves and pins can be connected, on the one hand to the external element of the joint and, on the other hand to the joint of the joint to ensure the

  protection of the diaphragm type disc or elastic sleeve

  tick in the longitudinal direction against any deformation

  destructive buckling. For the pin to be mounted in the sleeve with gentle freedom of movement, rings of material facilitating sliding must be provided, or roller guides. Apart from these support means, it is also possible to provide, between the rigid elements, axial stops and stops for

  torsion which prevents damage to the elastic sleeve

  longitudinal or membrane-like disc.

  According to an advantageous embodiment of the solution according to the invention, provision is made to close

  hermetically seal, a protective device iron-

  mé, integral with the joint pin or the external element

  of the joint and which connects axially to the other

  element of the joint surrounding the element with elasticity along

gitudinal.

  Other features and advantages of the

  vention will be better understood on reading the description

  tion which will follow from several preferred examples of rea-

  reading of the invention and with reference to the accompanying drawings

  attached, in which FIG. 1 represents a block diagram of a constant velocity joint according to the invention; Figure 2 shows the block diagram

  of a first embodiment of the constant velocity joint

  lon the invention; Figure 3 shows an alternative embodiment of the seal according to Figure 2;

  FIG. 4 represents a disc of the membrane type

not constituting a part of the joint;

  FIG. 5 represents an alternative embodiment

  tion of the constant velocity joint according to Figure 2; FIG. 6 represents the block diagram of a second embodiment of the constant velocity joint according to the invention;

  FIG. 7 shows a variant embodiment

tion of the seal of Figure 6;

  FIG. 8 represents an alternative embodiment

  tion of the seal according to Figure 6; FIG. 9 shows four embodiments of an elastic sleeve, which constitutes a part detached from the seal;

  Figure 10 shows a constant velocity joint

  lon the invention comprising a particular form of reaction

  reading of the axial stops and the bending support; FIG. 11 represents a joint in combination with two diaphragm type discs loaded by the torque and mounted in parallel; FIG. 12 represents a joint in combination with two membrane disks mounted in parallel and of which

only one is loaded by the couple.

  In FIG. 1 a homogeneous joint has been represented.

  netic 1 whose inner element 2 is assembled in the usual way to a male shaft 5, by means of a groove 3 and a stop ring 4, while

  the external element 6 of the seal is assembled in a second

  th end of the shaft 10, by means of elastic means

  ticks 7, which have a longitudinal elasticity and a bell 9, with the interposition of support means 8 of the sleeve tyoe. The constant velocity joint includes, Dour

  the transmission of the torque, of the balls 11 which are in pri-

  in a known manner with the inner element 2 of the seal and with the outer element 6 of this seal, as well as a ball cage 12 which is used to control the balls

when the joint bends.

  In FIG. 2, a homogeneous seal has been represented.

  kinetics such as that of Figure 1, composed of an element

  inner ment 2 which includes a male shaft 5, bil-

  11, a ball cage 12 and an external element of

  joint 6. A sleeve-shaped extension 13 is pre-

  seen integrally on the external element 6 of the seal. Con-

  according to the first basic principle of the invention, it is provided, as elastic means with elasticity

  longitudinal, a disc 14 of the membrane type which is

  from the outside on the extension sleeve 13 and, in-

  posteriorly, on the shaft end 10. In FIG. 3, in a constant velocity joint 1 in which the membrane disc 14 has in principle the

  same constitution and same provision as on the fig-

  re 2, and is interposed between the extension sleeve 13 and the shaft end 10, it is provided in addition on this

  end of shaft, a radial disc 16 provided with an outer sleeve

  laughing 15 which envelops the extension sleeve 13 in res-

  both free in axial translation and gives the element ex-

  térieur 6 of the joint a support on the end of shaft 10 and

  prevents him from bowing on this end of the tree. For the étan-

  seality, there is a protective cap 17 which surrounds the outer sleeve 15 and is engaged in a groove 18 so as to provide a possibility

axial movements.

  FIG. 4 shows an axial elevation view in the form of a spare part,

  the membrane disc 14 which has a central opening

  the 19 intended to receive the end of the tree, as well as

  slots 20 in an arc, distributed over the circumference-

  ce and arranged at different radii, which serve to auq-

  lie the axial elasticity. The disc which transmits the torque can also have a star shape, or

  be made up of strips of sheet metal which cross each other

lesson of the spokes of a wheel.

  In FIG. 5, a homogeneous seal has been represented.

  kinetics which largely corresponds to that

  according to Figure 3 but in which there are provided elements

  elastic annular elements 21, between the disc 16, which forms a stop for the axial displacement, and the external region of the diaphragm disc 14 or between the elements and 16, this annular element elastically absorbing the axial displacements of the diaphragm disc to avoid

  the resulting shocks and noises.

  In FIG. 6, a homogeneous seal has been shown.

  kinetic 1 in partial section, the parts of the seal being covered by a protective cap 23 which is visible in elevation. According to the second basic principle of the invention, in this embodiment, the external element 6 of the seal is connected, by a sleeve 22 with axial elasticity, to the bell 9 which is mounted on the second end of the shaft 10 To increase the axial elasticity, openings 24 in the form of diamonds have been provided in the sleeve 22. In this application, the sleeve must be of a rigidity calculated so that the inclination movements of the external element 6 of the seal relative to the shaft end 10 are avoided or that, at least, they do not cause of deterioration of the sleeve 22, since the latter must transmit the

full value of the torque.

  In Figure 7, there is shown entirely in

  cuts a constant velocity joint 1 which mainly corresponds

  pe in the representation according to Figure 6 and, in this case, there is provided, outside the sleeve with longitudinal elasticity 22, a support sleeve 36 which is engaged in a groove 25 of the outer element 6 of the joint and is rigidly secured to this element, and which, at its other end, tightly surrounds the bell 9, but with the possibility of axial translation, so that it thus establishes a support which opposes the movements of relative inclination between the external element 6 of the

seal and shaft end 10.

  In FIG. 8, a homogeneous seal has been represented.

  kinetics 1 having a substantially ana-

  log to that of the seal in Figure 7 but, here, it is

  provided, replacing the support sleeve 36, an extension

  inner liner 13 forming a sleeve and which serves, at its outer end, as a support means for the sleeve 22

  to oppose the tilting movements between the element

  outer ment 6 of the seal and the shaft end while, in the frontal position, it forms a stop for the bell 9, in order to limit the variations in the axial length of the sleeve 22. FIG. 9 shows four different embodiments of sleeves 22 with longitudinal elasticity,

  in the form of spare parts, the openings 24 des-

  aimed at increasing the longitudinal elasticity being cons-

  shaped by squares (a), diamonds (b), slits

  longitudinal (c) offset from each other

  very, or by slots 24 (d) which are offset

  relative to each other and filled with in-

  elastic settings 26, for example, by inserts

  made of a material having the elasticity of the rubber

  cabbage. Figure 10 shows a constant velocity joint

  1 in an embodiment similar to that of the fig-

  res 6 to 8, but o there is also shown, following the protective cap 23, a bellows 27 which encloses

  hermetically seal. The bell 9 which transmits the

  ple and the shaft end 10 are provided, in a variant

  embodiment, of an axial bore 28 in which is

  sleeved a shaft 30 which is integral with an internal bell

  inner 29 placed inside the bell 9. The bell 29 is assembled by a safety bond of form to

  the external element 6 of the seal or to an extended sleeve

  tor 13, using a stop ring 31, this connection acting in the axial direction and also opposing

  with small movements of relative inclination, without

  while excluding small movements in the direction of

  rotation neither in the radial direction. The tree 30 soli-

  daire of the bell 29 can slide axially in the

  drilling 28 with a limited amplitude, and an axial stop

  ale is represented by a pin 32 which crosses

  the shaft 10 and which crosses with play a transverse drilling

  it sal 33 of the shaft 30, in particular constituted by an elongated hole, with axial clearance relative to the shaft 30. To reduce the friction of the axial translation

  of the shaft 30 in the Deracement 28, there are two ba-

  sliding gues 34 and 35. In this way, with a low resistance to axial translations, we exclude

  the significant tilt movements between the element ex-

  térieur 6 of the joint and the shaft end 10, these movements

  of inclination being fully absorbed by the construction

  COMTIONED OF THE INNER BELL 29 AND THE SHAFT 30. The limitation of the axial translations between the

  tree ends 5 and 10 is provided, on the one hand, by the ar-

  rivet in abutment of pin 32 against the bottom of the hole

  elongated 33 and, on the other hand, by the lateral lateral stop

  blie between the extension sleeve 13 and the bell 9.

  In FIG. 11, a trunnion 101 and a shaft end 102 have been shown which are joined in rotation and with the possibility of angular movement by a joint 103. The joint is constituted by a sliding joint which admits an axial displacement of the trunnion 101 with respect to the shaft end 102. The ball hub

  104 is made integral with the pin 101 by a groove

  re 105 and a stop ring 106; the shaft end 102 is indirectly connected to the external element 110 of the constant velocity joint by two diaphragm type discs 107, 108 and a sleeve 109, thereby establishing a

  integral connection in rotation but flexible in the direction

* axial. At its inner periphery, the disc mem-

  brane 107a came in one piece with a base

  115 while the membrane disc 108 is assembled internally

  directly to the extension pin 116 of the shaft end

102 by a weld.

  Torque transmission in the joint

  netic 1 is carried out in the usual way via the

  medium of balls 111 which are controlled by a cage

  ball 11 when the seal bends. Membrane discs

  nes 107, 108 mounted on the shaft end 102 are connected

  solidly rotating at the end of the shaft 102 and at the

  chon 109 and they are made with thicknesses of pa-

  substantially equal kings. The sleeve 106 is connected to the external element 110 of the seal, forming a single piece with this element. The two membrane discs 107, 108 are of approximately equal wall thickness and they absorb the torque to be transmitted in approximately equal fractions, while they are relatively flexible with respect to the axial translations of the tip d 'shaft 102 by port to the external element 110 of the joint. The constant velocity joint 103 is closed with a tight seal on the end

  shaft 102 by the sleeve 109 and by the disks mem-

  branes 110 while the internal volume of the constant velocity joint is hermetically isolated from the outside by means of a sheet metal sleeve 113 and a bellows 114. In FIG. 12, a trunnion 101 and a tip have also been shown. shaft 102 which are assembled to one another, integrally rotated and. being able

  tilt one with respect to the other by a joint 103.

  In the same way as already described above, here, a ball hub 104 is rigidly connected to the journal

  101 by a groove 105 and a stop ring 106, tan-

  say that the shaft end 102 is assembled to the element ex-

  110 inside the joint by two diaphragm type discs

  107, 108 and a sleeve 109. Here, the sleeve 109 is com-

  installed with a massive annular element 117 and a wall in

  sheet 118 which are assembled coaxially to each other.

  The annular element 117 is rigidly assembled to the element

  outer ment 110 of the joint by screws 119; the sheet metal wall 118 ends with the disc of the membrane type 107b, with which it is in one piece, this disc bearing radially on the pin 116 of the end

  shaft 102 and being axially clamped on the end of the

  bre 102. However, the sleeve and the membrane disc

  107b are not intended for the transmission of torque.

  In front of this disc, the membrane type disc

  ne 108b is engaged, at its outer periphery

  re, in the annular element 117, for example because of the radial fingers, to establish a solid connection in

  while, at its inner periphery,

  re, it ends with an inner sleeve 120 which is fixed on the pin 116, integrally in rotation by means of a groove 121 and with a blocked connection

  in the axial direction. The end of the inner sleeve

  rieur 120 serves here at the same time for the internal axial locking

  laughing disc membrane 107b. The couple is fully

  transmitted by the membrane disc 108b while the absorb-

  bending forces are distributed over the two dis-

  that membranes. The membrane discs can flex flexibly relative to the shaft end 102 and a body

  molded interior 122 interposed between the two mem-

  branes limits the translational travel, possibly also providing elastic resistance. Also in this embodiment, the seal of the seal 103 on the shaft end 102 is ensured by the sleeve

  109 and by the membrane disc 108b while, from the

  On the side, a sleeve part 113 fixed by means of the screws and a bellows 14 which is shown with partial cutouts ensure the sealing of the joint in the same way.

than in the previous example.

  Of course, various modifications may be made by those skilled in the art to the device which

  has just been described only by way of non-binding example

  mitative without departing from the scope of the invention.

Claims (19)

R E V E N D I C A T I ON S   1 - Constant velocity joint, in particular intended for the kinematic chain of motor vehicles, comprising   a rigid link in rotation but with long elasticity   dinal between the elements of the joint which can tilt   ner with respect to each other, characterized by at least one disc of the membrane type (14) used as an element of   longitudinal elastic connection between an annular element   joint area (6) and a joint journal (10) which is connected to the annular element.   2 - Joint according to claim 1, characterized   in that the diaphragm type disc (14) is mounted   two rigid stop elements (13, 16) which are   rigidly fixed to the pin (10) or to the external element laughter (6) of the seal.   3 - Seal according to one of claims 1 and 2,   characterized in that the diaphragm type disc (14) has openings formed by slots (20) in arc shape.   4 - Seal according to one of claims 1 and 2,   characterized in that the diaphragm type disc (14)   has openings formed by radiant slots the.   - Seal according to one of claims 1 to 3,   characterized in that elastic elements (21), no-   especially rubber or plastic, are   bent between the diaphragm type disc (14) and the rigid stop elements (16).   6 - Joint according to claim 1, characterized in that at least one half joint comprises two elements   (109, 116) which are connected to each other by two dis-   ques of the membrane type having the form of discs an-   and which are mounted perpendicular to the axis of rotation, at a certain mutual axial spacing, these   discs being fixed to the first element (116) by their re-   interior and to the second element (109) by their re- outside region.   7 - Joint according to claim 6, characterized in that the two diaphragm type discs (107, 108) are connected to each other in their outer region oar through a sleeve (109) rigid in bending which is especially one piece with one element outside (110) of the seal.   8 - Joint according to claim 6, characterized in that the two diaphragm type discs (107, 108) are connected to each other in their inner connection by means of a shaft (116) rigid in bending and which is in particular a single piece with a tip shaft (102) of the seal.   9 - Seal according to one of claims 6 to 8,   characterized in that only one (108b) of the discs of the type   membrane is rigidly fixed in rotation in its   interior and exterior regions, while the other   (107b) disqcues of the membrane type takes sole support-   in the radial direction and in the axial direction   in its interior region and / or in its exterior region better.   - Seal according to one of claims 6 to 9,   characterized in that the diaphragm type discs (107, 108) have radial or arcuate slots in a closed area.   11 - Seal according to one of claims 6 to 9,   characterized in that the diaphragm type discs (107, 108) have sheet metal strips which intersect like the spokes of a wheel and which are stressed by   tensile forces when the joint transmits a full.   12 - Seal according to one of claims 6 to 11,   characterized in that an elastic element is interposed between the diaphragm type discs (107, 108), in particular with a small axial clearance.   13 - Seal according to one of claims 6 to 11,   characterized in that a rigid stop element (122) is interposed with a small axial spacing between the membrane type discs.   14 - Joint, especially intended for the cinema chain -   motor vehicle material, comprising a link   its rigid in rotation and elastic in the longitudinal direction between the elements of the joint which can tilt relative to each other, characterized by an openwork sleeve (22) used as a connecting element with longitudinal elasticity between an annular element (6) of the joint and a pin (10) of the joint which is connected to the annular element.   - Joint according to claim 14, character-   in that the longitudinally resilient sleeve (22) is supported by a rigid outer sleeve (36), rigidly connected to the pin (10) or to the outer element (6) of the seal and which provides freedom of translation   axial but opposes the relative tilt movements Fri   16 - Joint according to one of claims 14 and   , characterized in that the elastic sleeve (2)   longitudinal is supported by a rigid inner sleeve   of (13), rigidly integral with the journal (10) of the seal or with the external element (6) of the seal and which provides a   freedom of axial translation but opposes movement relative tilt elements.   17 - Joint according to one of claims 14 to   16, characterized in that the longitudinally resilient sleeve (22) is composed of solid parts which form angles of about 45 with the generatrices of the joint while diamond-shaped openings (24a) are formed between these solid parts.   18 - Joint according to one of claims 14 to   16, characterized in that the elasticated sleeve (22)   longitudinal includes several rows of circular slots   conferences (24c, d) offset from each other to others.   19 - Seal according to one of claims 14 to   18, characterized in that elastic elements are provided   ticks (21, 26) between the outer element (6) of the seal and the pin (10) or inside the sleeve (22) at   longitudinal elasticity, in particular in the openings tures or slots (24).   - Seal according to one of claims 1 to 19,   characterized in that support means opposing the   relative tilt movements which can be   place in axial translation relative to each other, are fixed, on the one hand, to the external element (6) of the   seal and, on the other hand, to the pin (10) of the seal.   21 - Seal according to one of claims 1 to 20i   characterized in that there are provided means of stop   biles in axial translation with respect to each other, which limit the abutment movements and which are fixed,   on the one hand, to the external element (6) of the seal and,   be part of the joint (10) of the joint.   22 - Seal according to one of claims 1 to 11,   characterized in that an attached inner bell (29) ri-   gidly to a central shaft (30) serves both as a support to oppose the bending movements, and as a stop to oppose the axial translations, the bell (29)   being joined to the external element (6) of the solid joint   in the axial direction and so as to accompany   hinder its tilting movements, while the shaft (30) is housed in the shaft end (10) being able to move therein in axial translation, in particular over a limited stroke.   23 - Joint according to one of claims 1 to 22,   characterized in that the inner bell (29) of the rear   bre (30), which serves as a support, is mounted in the element ex-   térieur (6) of the joint of this element in   the axial direction and so as to support solidai-   the tilting movements of this element, but being able to move there radially in order to compensate manufacturing tolerances.