FR2770603A1 - HYDRODYNAMIC TORQUE CONVERTER REACTOR - Google Patents

Abstract

Hydrodynamic torque converter reactor comprising a reactor hub which, for its radial mounting radially surrounds an outer freewheel ring on at least a part of its axial extension, and has relative to the outer freewheel ring; on at least one axial side thereof, an overlying axial projection, and an axial bearing which axially positions the reactor relative to the converter housing, said axial bearing cooperating on at least one side with the outer ring of the freewheel and with its other side, with the converter housing, characterized in that the axial projection (39) comprises supports (41) distributed at the periphery at defined angular intervals (a), these supports ensuring their centering by their radially side. interior (43), protruding from the inner side (46) of the reactor hub (21), at least the axial bearing.

Description

The present invention relates to a hydrodynamic converter reactor

  torque device comprising a reactor hub which, for its radial mounting radially surrounds an outer freewheel ring on at least a portion along its axial extension, and has with respect to the outer freewheel ring, on at least one side axial axis thereof, an axial projection which protrudes, and an axial bearing which positions the reactor axially relative to the converter housing, this axial bearing cooperating on one side at least 1) with the outer ring of the freewheel and with its

  other side, with the converter housing.

  Such a reactor is known for example according to DE 44 23 640 A1 and in particular according to FIG. 1 of this document. This reactor is mounted on the outer ring of a

  free wheel which assures the radial mounting; the reactor

  radially turns this outer freewheel ring over its entire axial extension. Axially on both sides of the outer freewheel ring, there are axial projections protruding into radially inwardly protruding beaks; these spouts abut on both sides axially of the outer freewheel ring and thus ensure those relative axial movements with respect to the hub of

freewheel.

  The outer freewheel ring, which is guided by clamping members and an inner freewheel ring on a hollow shaft mounted between the drive shaft and the converter housing, provides in addition to the radial centering of the reactor also the centering of a clamping washer or pressure washer supported by a

  side against outer freewheel ring; this dream

  delle is supported by its opposite side against an axial axial bearing

  itself bearing against the pump cup of the

  converter housing. The axial bearing positions axial-

  the outer freewheel ring and thus the reactor, on one side with respect to the converter housing while the reactor is maintained on its opposite axial side by a

second axial bearing.

  As the outer freewheel ring not only ensures the centering of the reactor but also that of the clamping washer, this centering is particularly delicate especially with respect to the clamping ring, because this centering is in a very narrow volume of the torque converter over a relatively small diameter. The clamping ring itself is generally a cast iron piece having a relatively good workmanship, because it is used for centering axially on the freewheel and, on the other hand, it must have an axial shoulder for the centering of the axial bearing. In addition, the width due to the complicated realization of the clamping ring is extremely large especially in the inner radial zone, in the place

  o precisely there is little room.

  The object of the present invention is to develop the hub portion of a reactor so as to allow, with as little constructional means as possible and limited axial space, both the centering of the reactor with respect to the freewheel and the centering of the reactor. a clamping washer or

an axial bearing.

  For this purpose, the invention relates to a torque converter reactor of the type defined above, characterized in that the axial projection comprises supports distributed at the periphery at defined angular intervals.

  supports ensuring their centering by their side quickly

  inside, protruding beyond the inner side of the reactor hub,

at least the axial bearing.

  The realization of the hub of the reactor with an axial projection which protrudes axially relative to the outer ring of the freewheel, and having supports distributed at its periphery at defined angular intervals, makes it possible to produce the hub of the reactor, each time from on either side of a support at the axial projection with a reduced wall thickness, which is particularly advantageous

  for the realization of the reactor and thus of this hub of reaction

  a thermoplastic material, because of the ease of manufacture; moreover, at. level of supports, we have

  resistance to deformation, sufficient, so that

  it can center at least the axial bearing with its radially inner sides. For this, the supports with their radially inner sides each time peripheral zones of the hub of the reactor, are turned radially inward and rely on the axial bearing at predetermined points along its diameter. The supports can be made in one piece with the projection

  adjacent to the reactor hub and thus give the

  axial bond a very high radial rigidity; we can also

  connect them solidarily to the hub of the reactor only

  their axial end facing the hub, leaving them

  also free at a certain distance from the

  inner dial of the reactor hub. This gives an elasticity for the supports in the radial direction which makes it possible to predict optimum results, especially if

  uses an elastic material in itself. This form of realization

  tion of the supports makes it possible to block by clamping an axial bearing and, if appropriate, a clamping washer cooperating with this bearing, radially via the supports

  2) to achieve a simple connection by force

  be the hub of the reactor and the clamping washer and the

  axial bond without requiring a connection by the form for locking in rotation. Similarly, we can envisage links

  in rotation between the clamping washer and the hub of the reaction

  thanks to the radial projections provided on the washer of

  each time two protrusions attack each

  port, on both sides, without presenting a game in the peripheral direction.

  With the supports above, one can also attribute

  3) buer another function that results from the realization of the reactor to the extent o that it is for example obtained by injection using a thermoplastic material. For

  this requires a tool (mold) with at least two

  with rooms to introduce the subject. When

  the injected material is rigid after cooling,

  axially the two halves of the mold. For this, we

  axially lift one of the halves, then the reactor is expelled by axially movable ejectors provided on the other half of the mold to expel the reactor of the latter mold half. These ejectors known per se can be positioned according to the invention so that the free ends of the supports serve as bearing surfaces for each time an ejector. According to another characteristic, the previously mentioned clamping washer which is preferably provided axially between the outer ring of the freewheel and the axial bearing, and which serves to induce pressure forces in the relatively sensitive axial bearing, is formed by a

  a forged steel plate washer which in a method of

  ideal, has no plastic deformation and is supported with its axial side against the outer ring

  of the free wheel and with its other axial side against the

bind axial.

  The outer periphery of a washer

  rage thus produced can be mounted on the radially inner side of the supports to come to bear so that the clamping washer and the adjacent axial bearing are each centered by the supports vis-à-vis the other

parts of the converter.

  According to another embodiment, the zone

  the outer ring of such a pressure washer can also

  bending in the axial direction to ensure centering on the one hand with its outer periphery against

  reactor hub supports and, on the other hand, to provide the

  trage of the axial bearing with its internal diameter. This allows

  puts thus with an implementation of constructive means

  globally reduced, an extremely small achievement

  in the radial zone of the freewheel.

  According to other advantageous features of the invention:

  - the supports consist of spacers coming from

  projecting inwards in relation to the

  remaining part of the axial projection, the supports are integrally connected to one axial end at the hub of the reactor and each of the connection points

  is chosen so that the supports are at an inter-

  predetermined value with respect to the inner radial side of the reactor hub,

  the supports are elastically deformable in the direction

  radial arrangement, - the free ends of the supports serve as driving surfaces for each of the ejectors, - the clamping washer is constituted by a stamped steel plate washer, the clamping washer is centered on the supports, the clamping washer has radial projections which act in the peripheral direction, each time on either side of a support, the centering of the axial bearing on the support of the hub of

  The reactor is made by an axial shoulder which

  against the supports of the lock washer, the

  axial bearing bearing against the inner side ra-

dial of this axial shoulder,

  the axial shoulder is formed by bending the radial zone

  outer ring of the clamping washer essentially

in the axial direction.

  The present invention will be described hereinafter in more detail using exemplary embodiments of

  schematically represented in the drawings

  nexés, in which: - Figure 1 shows the upper half of a portion of a hydrodynamic torque converter, seen in

  section, with a representation of the center of gravity of the reaction

  and a clamping washer centered at the hub of the reactor and an axial bearing, - Figure 2 is an axial view of the reactor and

  a clamping washer, cut along line II-

  II of FIG. 1, with a polygonal section for the

  ports relative to the radial inner side of the hub, in de-

  passing axially, - Figure 3 is a sectional view along the line III-III of Figure 2, - Figure 4 corresponds to Figure 2 but with semi-circular section supports - Figure 5 corresponds to Figure 2 but with

  cylindrical section supports, spaced apart on the radial side

  FIG. 6 is a clamping washer viewed in the axial direction, FIG. 7 is a sectional view of the clamping washer cut along the line VII-VII of FIG. 6, FIG. 8 corresponds to FIG. 1 but with a clamping washer having an axial extension in the peripheral zone; FIG. 9 corresponds to FIG. 1 but with an axial bearing in the form of a plain bearing and without the use of clamping washers; Figure 10 shows a detail of an equipped tool

ejectors for the reactor.

  Figure 1 shows the part of a converter

  hydrodynamic torque in which is the reactor.

  The entire torque converter has not been shown and will not be described because such torque converters are known according to the state of the art such as for example

  according to DE 44 23 640 A1 mentioned in the preamble.

  The figure shows a small portion of a converter body 1 namely by the pump cup 3 which is part of the pump wheel or simply the pump 5. The pump cooperates with a turbine wheel or more simply a turbine 7 receiving hydraulic fluid from the pump 5 via the reactor 9. The turbine 7 is fixed to a turbine hub 13 by rivets 11; the hub 13 is integral in rotation with the output shaft by 3 () via a toothing 15 on its inside diameter

(not shown)

  The reactor 9 already mentioned comprises a blade 17 carried by the reactor hub 21; the free ends of the blade 17 are fixed to each other by a connecting ring 19. The hub 21 of the reactor is itself fixed on

  the outer ring 31 of a freewheel 29; the outer ring

  31 of this freewheel is. connected by clamping members 33 to an inner freewheel ring 35. This comprises at its internal diameter, a toothing 37 by which it integrally drives in rotation a hollow shaft not shown, passing radially between the the output shaft mentioned above and a sleeve 51 on the outlet side and integrally carrying the pump cup 3. The hub 21 of the reactor comprises on its side facing the turbine hub 13, an axial sliding bearing 23 provided with grooves For the hydraulic fluid passage of the converter circuit; the hydraulic fluid arrives in 1) the interval, radially between the hollow axis already mentioned and

the output axis.

  The hub 21 of the rotor has on its side facing the pump cup 3, an axially projecting portion

  39; as shown in Figures 2 and 3, this

  projecting piece 39 passes with a relatively radial section

  weak and has in the peripheral direction

  predetermined angular lengths (E), supports 41; these supports are formed in that, starting from the radial inner side 46 of the hub 21, there are spacers 55 in the section

  2 <essentially rectangular and which are directed radially

  inwards. As is apparent in particular from the

  3, the inner 43, radial sides of the supports 41 serve both to receive a pressure washer 47 and an axial bearing 45 in the form of a rolling bearing 49; this bearing is centered only on the radial inner side 43 of the support 41 while the pressure washer 47 provides in addition to the centering function by the support 41 also a locking function in rotation, the radial projections 61 (see for this purpose also Figures 6 and 7) 3 arrive on both sides of each support 41, radially outwardly to the level of the radially inner side 46

  of the reactor hub 21. The pressure or service washer

  rage 47 is a simple plastically indeformable part;

  it is preferably a piece of stamped sheet steel. This-

  reduces the cost of such a clamping washer and makes half

nimum the axial size.

  Figure 4 shows a. another embodiment of the support 41; it protrudes from the radially inner side 46, with a semicircular section,

  radially inward. The location of the semi-section

  circular, with the greatest radial proximity of the geometric axis 72, is the radially inner side 43 of the support 41 for centering the clamping washer 47 and the axial bearing 45. Unlike the embodiment of Figure 2, this reduces the area required for the bearing of the pressure disk 47 and the axial bearing 45 on the supports

  41 without, however, causing a deterioration of

tioning.

  Whereas the supports 41 of FIGS.

  mainly in the radial direction, a receiver

  As shown in FIG. 5, which have a cylindrical cross-section and the ends facing the hub 21 of the reactor are integral with the hub 21, are separated from the gap 71 with respect to the radially

  inside 46 of the reactor hub 21; this interval 71

  torise especially if this support 41 is made elastically,

  an elastic escapement towards the radially in-

  inner 46 of the hub 21 of the reactor; the hub works

  as an abutment for the support 41. When introducing axial

  the clamping washer 47 and the axial bearing 45, the supports 41 by this means can escape radially outwards, but because of the prestress thus created, they retain both the clamping washer 47 and the axial bearing 45 by a connection by force. Due to this connection by force, an embodiment of the axial bearing 45 is eliminated with radial projecting parts 61 and nevertheless there remains a solidarity connection in rotation between

  the hub 21 of the reactor and the clamping washer 47.

  According to FIGS. 2, 4, 5, the free ends 53 of the supports 41 are used as bearing surfaces 60 for each ejector 59 shown in FIG. 10 of a tool 57. At the same time, the hub 21 of the reactor is mounted on the tool 57 with the blade 17 and the connecting ring 19 and

  the outer freewheel ring 31 made by injecting

  tion. This tool 57 represents half of a tool, the other half has already been removed. Thanks to an easier extraction of the reactor 9 from the tool 57, the ejector 59 can then be displaced in the axial direction according to FIG. 10 to the left until this ejector exerts an axial force on the surface of support 60 supports 41 ejecting

  thus the reactor 9 of its chamber in the tool 57.

  Figures 6 and 7 show a washer of

  rage 47 as a detail used in the embodiment of the reactor hub 21 with the supports 41 of Figure 2. Clearly appear the radial projecting portions 61 on each side of a peripheral zone 62. However in the case of a reactor hub 21 according to FIG.

  can suppress the radial projections 61 without replacing them.

  In the embodiment of FIG. 4, the peripheral zones 62 make it possible to adapt to the shape of the supports 41 by

  realizing each time in the form of a semicircle.

  The view of FIG. 8 differs from that of FIG. 1 in that the clamping washer 47 has in its peripheral zone a portion bent in the axial direction forming an axial shoulder 63. This shoulder

  is supported by its outer periphery against the radial

  43 of the supports 41 and with its radial inner side 61, it forms a centering means for the axial bearing 45. As the axial shoulder 63 of the clamping washer 47

  is realized at the same time as the washer of ser-

  rage in a sheet metal part, this embodiment

  does not involve extra work.

  In contrast to the figures already discussed above in which the axial bearing 45 is always constituted by a rolling bearing 49, in the embodiment of FIG. 9, an axial sliding bearing 67 having

  grooves 69 to improve its sliding characteristics.

  is lying; these grooves are traversed by the hydraulic fluid

  that lubricant. Unlike very filigree rolling bearings 49, this plain bearing 67 does not require a clamping washer on the reactor side and the axial sliding bearing 67 is nevertheless centered on the radial inner side 43

supports 41.

  Nomenclature: 1. Converter housing 2. Pump cup 5. Pump 7. Turbine 9. Reactor 11. Riveting 13. Turbine hub 15. Toothing 17. Idling 19. Connecting ring 21. Reactor hub 23. Bearing axial 25. Grooves 27. Axial ring 29. Freewheel 31. Outer ring of freewheel 33. Outer ring freewheel clamping ring 35. Inner freewheel ring 37. Toothing 39. Axially projecting part 41. Support 43. Radially inner side of support 45. Axial bearing 46. Radial inner side of reactor hub 47. Clamp washer 49. Roller bearing 51. Sleeve 53. Free end of supports 55. Spacer 57. Tool 59. Ejector 60 Leading surface 61. Radial projection 62. Peripheral zone 63. Axial shoulder 65. Radial inner side of the axial shoulder 67. Diaxial bearing 69. Grooves 71. Interval 72. Geometric axis

Claims (7)

R E V E N D I C A T I ONS   1) Hydrodynamic converter torque converter   taking a reactor hub which, for its radial mounting   radially rotates an outer freewheel ring over at least a portion along its axial extension, and has, with respect to the outer freewheel ring, on at least one axial side thereof, an overlying axial projection, and an axial bearing which axially positions the reactor with respect to the converter housing, this axial bearing cooperating on at least one side with the outer ring of the wheel   free and with its other side, with the case of converts   characterized in that the axial projection (39) comprises supports (41) distributed at the periphery according to determined angular intervals.   (a) these supports ensuring their centering by their fast   interior (43), extending beyond the inner side (46) of the   reactor hub (21), at least the axial bearing (45).   2) 20) Reactor according to claim 1, characterized in that the supports (41) consist of spacers (55) radially projecting inwardly relative to the remaining portion of the axial projection (39).   3) Reactor according to any one of claims 1   or 2, characterized in that the supports (41) are integrally connected to one end 3 (axial to the hub (21) of the reactor and each of the connection points is chosen so that the supports (41) are at a predetermined interval ( 71) with respect to the radial side   interior (46) of the reactor hub (21).   40) Reactor according to claim 3, characterized in that   the supports (41) are elastically deformable in the di- radial rection.    Reactor according to any one of claims 1, 2,   3 or 4, which in manufacture is in a tool and which, to escape from this tool is biased by an axial force exerted by ejectors axial movement of the tool, characterized in that   the free ends (53) of the supports (41) serve as   leading faces (60) for each of the ejectors (59).   1) 6) Reactor according to any one of claims 1 to 5,   comprising an axial bearing which is associated with a clamping washer which bears against one end against the axial bearing and on the other side against at least the outer freewheel ring, characterized in that the clamping washer (47) is constituted by a washer made of stamped steel sheet.   7) Reactor according to claim 6, characterized in that the clamping washer (47) is centered on the supports (41).   Reactor according to any one of claims 6   or 7, characterized in that the clamping washer (47) has radial projections (61) which act in the peripheral direction, each time   on either side of a support (41). 3o   9) Reactor according to any one of claims 1   and 6, characterized in that the centering of the axial bearing (45) on the support (41) of the reactor hub (21) is via an axial shoulder (63) which bears radially against the supports (41) of the clamping washer (47), the axial bearing (45) bearing against the radial inner side (65) of this axial shoulder (63)) Reactor according to claim 9, characterized in that   the axial shoulder (63) is formed by bending the radial zone   the outer ring of the clamping washer (47) in the axial direction.