CA2019623A1 - Short cardan joint and vehicle transmission equipped with such a joint, and preferably with an electric retarder - Google Patents
Short cardan joint and vehicle transmission equipped with such a joint, and preferably with an electric retarderInfo
- Publication number
- CA2019623A1 CA2019623A1 CA002019623A CA2019623A CA2019623A1 CA 2019623 A1 CA2019623 A1 CA 2019623A1 CA 002019623 A CA002019623 A CA 002019623A CA 2019623 A CA2019623 A CA 2019623A CA 2019623 A1 CA2019623 A1 CA 2019623A1
- Authority
- CA
- Canada
- Prior art keywords
- flange
- joint
- fork
- cardan joint
- integral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
Abstract
ABSTRACT OF THE DISCLOSURE
A cardan joint is disclosed comprising a first fork (2) integral with an assembly flange, a second fork (4) integral with a shaft section (5) and a journal cross (6) whose four journals (7, 8) are mounted in twos on the two forks with interpositioning of needle bearings or similar.
The flange (1), integral with one of its two forks (2), is formed axially with two through apertures (9) adapted to receive the arms of the other fork (4) when the bending angle of the joint is large. The choice of such a joint is particularly recommended for extra short vehicle transmissions equipped with electric retarders.
A cardan joint is disclosed comprising a first fork (2) integral with an assembly flange, a second fork (4) integral with a shaft section (5) and a journal cross (6) whose four journals (7, 8) are mounted in twos on the two forks with interpositioning of needle bearings or similar.
The flange (1), integral with one of its two forks (2), is formed axially with two through apertures (9) adapted to receive the arms of the other fork (4) when the bending angle of the joint is large. The choice of such a joint is particularly recommended for extra short vehicle transmissions equipped with electric retarders.
Description
Short cardan ~oint and vehicle transmission equipped with such a joint, and preferably with an electric retarder.
The invention relates to cardan joints comprising a first fork or jaw integraI with an assembly flange, a second fork or jaw integral wi-th a shaft section and a journal cross whose four journals are mounted in twos on the two forks with interpositioning of needle bearings or similar.
It also relates to transmissions equipped with ~uch cardan joints, which transmissions transmit the drive torque from the gearboxes to the rear axles of the vehicles.
For some of these transmissions, attempts are made to shorten as much as possible the distance dl between the centre O of the journal and the face F of application of the flange of the joint against the associated flange of the transmission.
This is in particular the case for certain transmissions equipped with electric eddy current retarders, or such equipment extends the transmission and such an e~tension may raise serious problems.
Thus, in mcdern rear-engined coaches, the overall length of the engine-gearbox assembly and that of the rear axle, particularly of hypoid type, have increased latterly without the respective locations` of these members ~being~
` modified.
Now, in ~the transmissions considered equipped with electric retarders, the rotor of~the retarder is generally 30 ~mounted on a "gearbox flange" whlch~is cantilevered at the output of a "nose" forming part of the ca~sing of the ; gearbox and whlch is estended~by a splined sleeve force fitted~ in a complementary splined end inside the gearbox.~
It is then against~the external face of this gearbox flange that the flange~of the cardan joint the nearest to :
:: ~, . ~ -.
: ` : :
i3 this gearbox is mounted.
Now, the distance d2 between the external face F on which the gearbox flange is fitted and the front plane P
of the gearbox, against which is applied the mount comprising the above nose, cannot be reduced below a relatively large value if said gearbox flange is to support the rotor of an electric retarder.
By way o indication, this distance d2 is ~or example abou~ 115 mm for~a re-tarder whose outer diameter is about 500 mm.
One of the essential aims of the invention is to shorten as much as possible the distance D formed of the sum of the two above distances dl and d2, i.e. the distance between the centre O of the journal cross and plane P.
For this, the distance dl is adjusted.
To give this distance dl a particularly low value, the cardan joints of the above kind according to the invention are essentially characterized in that the flange integral with one of their two forks, which flange has, in a way known per se, a flat or substantially flat end face and is perforated with fixing holes, is formed axially wi-th two through holes adapted to receive the arms of the other fork when the bending angle of the joint is large, which apertures are separated from each other by a central spacer.
In preferred embodiments, recourse is further had to one and/or other of the following arrangements :
- the contour of the flat end face of the flange of the joint is circular, - the fork integral with the flange of the joint is formed b~ two parallel lugs f~ormed~respectively with two coaxial bearings and the bases of these -two lugs are joined together by three parallel spacers defining the above apertures in twos, ~ - the central spacer has the~shape ot a thick =ylindrical .
~ '`
The invention relates to cardan joints comprising a first fork or jaw integraI with an assembly flange, a second fork or jaw integral wi-th a shaft section and a journal cross whose four journals are mounted in twos on the two forks with interpositioning of needle bearings or similar.
It also relates to transmissions equipped with ~uch cardan joints, which transmissions transmit the drive torque from the gearboxes to the rear axles of the vehicles.
For some of these transmissions, attempts are made to shorten as much as possible the distance dl between the centre O of the journal and the face F of application of the flange of the joint against the associated flange of the transmission.
This is in particular the case for certain transmissions equipped with electric eddy current retarders, or such equipment extends the transmission and such an e~tension may raise serious problems.
Thus, in mcdern rear-engined coaches, the overall length of the engine-gearbox assembly and that of the rear axle, particularly of hypoid type, have increased latterly without the respective locations` of these members ~being~
` modified.
Now, in ~the transmissions considered equipped with electric retarders, the rotor of~the retarder is generally 30 ~mounted on a "gearbox flange" whlch~is cantilevered at the output of a "nose" forming part of the ca~sing of the ; gearbox and whlch is estended~by a splined sleeve force fitted~ in a complementary splined end inside the gearbox.~
It is then against~the external face of this gearbox flange that the flange~of the cardan joint the nearest to :
:: ~, . ~ -.
: ` : :
i3 this gearbox is mounted.
Now, the distance d2 between the external face F on which the gearbox flange is fitted and the front plane P
of the gearbox, against which is applied the mount comprising the above nose, cannot be reduced below a relatively large value if said gearbox flange is to support the rotor of an electric retarder.
By way o indication, this distance d2 is ~or example abou~ 115 mm for~a re-tarder whose outer diameter is about 500 mm.
One of the essential aims of the invention is to shorten as much as possible the distance D formed of the sum of the two above distances dl and d2, i.e. the distance between the centre O of the journal cross and plane P.
For this, the distance dl is adjusted.
To give this distance dl a particularly low value, the cardan joints of the above kind according to the invention are essentially characterized in that the flange integral with one of their two forks, which flange has, in a way known per se, a flat or substantially flat end face and is perforated with fixing holes, is formed axially wi-th two through holes adapted to receive the arms of the other fork when the bending angle of the joint is large, which apertures are separated from each other by a central spacer.
In preferred embodiments, recourse is further had to one and/or other of the following arrangements :
- the contour of the flat end face of the flange of the joint is circular, - the fork integral with the flange of the joint is formed b~ two parallel lugs f~ormed~respectively with two coaxial bearings and the bases of these -two lugs are joined together by three parallel spacers defining the above apertures in twos, ~ - the central spacer has the~shape ot a thick =ylindrical .
~ '`
2 ~ 3 bar whose cross section has the general shape of a curvilinear triangle, - the two end spacers are defined outwardly by a cylindrical face of revolution about the axis of the flange and inwardly by portions of a sphere centred on the centre of the journal cross, - the flange o the transmission on which the flange of the cardan joint is fixed is itself formed with two cavities disposed opposite apertures in the flange of the joint and adapted to receive also the arms of the other fork when the bending angle of the joint us large, - in a vehicle transmission equipped with at least one cardan joint of the above defined kind fixed on a "gearbox flange" carrying the rotor of an electric retarder, this rotor is fixed on said gearbox flange on an enlarged periphery of this flange, via a tubular insert of the kind described in the patent FRANCE no. 89 08045.
Apart from these main arrangements, the invention comprises certain other arrangements which are preferably used at the same time and which will be more explicitly discussed hereafter.
In what follows, one embodiment of the invention will be described with reference to the accompanying drawings in a way which is of course in no wise limitative.
Figure 1 of these drawings shows in axial section a part of a vehicle transmission equipped with~an electric ;retarder and comprising~ a cardan joint according to the invention;
~Figures 2 and;3 show on a larger scale, respectively in an end view in the direction of arrow II of figure 3 and in axial section~through III-III of figure 2, one of the~parts~forming~said~cardan~joint.
~` The cardan Jolnt~in quest~ion~comprises :
- a fixing flange l integral with~a first fork 2 defining two bearings 3 (figures 2 and 3)~,~ said flange having a :
: ~' . ~:
.
:
flat or substantially flat transverse end face with a generally circular contour adapted to be applied axially against a complementary flat transverse face of another flange described further on, - a second fork 4 defining two other bearings (not shown) and integral with a shaft section 5, - and a journal cross 6 comprising four journals 7, 8 adapted for cooperating respectively two by two with the bearings of the forks 2 and 4 with interpositioning of needle bearings or similar.
In general, this joint is associated with a second identical joint provided at the opposite axial end of the shaft section 5j which provides a homocinetic transmission between the two end flanges of the two cardan joints, the assembly forming a double cardan shat.
The problem which arises is that of reducing as much as possible the distance between the centre O of the journal cross of one at least of the two cardan joints and the flat face F for mounting the corresponding flange so that, for a given distance between the two mounting faces which are generaIly parallel of the two flanges of the double cardan shaft, a maximum distance is maintalned between the centres of the two ~ournal crosses and the angular free movements of said shaft are hindered as little as possible.
For thls, two apertures 9 are formed through flange 1 for receiving the two arms of~fork 4 when the axis of the shaft section 5 is highly slanted with respect to the axis of the flan~e.
In the preferred embodiment illustrated, ~the 1ange lO~on which the cardan flange l~is ;to be ~flxed ~has also been formed with cavities ll disposed opposite apertures 9 and capable of receiving, like~these apertures, the arms of fork 4.
With these arrangements,~the angular movements of the shaft section 5 about the~ axls~common to the two :
: `
`` 2 ~
journals 7 are no longer limited by the arms of said fork 4 abutting against flange 1, which makes it possible, all other things being equal, to place the centre 0 closer to face F, i.e. reduce the distance dl.
Thus, by way of example, with a construction of the kind illustrated in the drawings and corresponding to the above mentioned dimensions, it is possible to reduce the value of said distance dl from 85 mm to 55 mm.
The gain thus obtained in shor~ening the axial distance dl ~lS doubled if the two cardan joints of the double cardan shaft considered are both construated in the above way.
In the numerical example which has just been given, the axial gain obtained is then 60 mm.
In the embodiment illustrated, the first fork 2 is formed by two lugs having the general form of thick parallel plates with a triangular contour formed with bearings 3 and the bases of these two lugs are ~oined together by three parallel spacers forming part of flange 1, namely a central spacer 11 and two edge spacers 12.
These ~.three spacers define between them in twos the apertures g. : , The central spacer 11 has the form of ;a thick rectilinear bar whose cross section is defined by an :
isosceles triangle with rounded corners: thus, this bar has, faoing the ~ournal cross, slantlng faces 111, which allows the maximum free angular movement of~this journal cross as can be seen in figure 1. ~
The edge~ spacers~l2 ;are~ mlted ;outwardly by portions of a continuous~ cylindrical ~face of revolution 121~extending over the~ whole periphery;of flange 1.~ ~
They are~de~flned lnwardly~by portions of a spherical face 122 centred on the ~entre 0~of journal cross 6.
These can also~bè~sèen in figures 2 and 3 : ~
35 ~ stepped~bores 12~formed in lugs 2, for recèiving the bolts or stud bolts for~;flxing flange~l on flange 10, , : :
:. ~ .
- annular grooves 13 formed in bearings 3 for receiving locking washers of the circlip type, - and parallel teeth 14 provided on the fixing face of flange 1 and adapted for cooperating with complementary teeth provided on flange 10.
The gain obtained in shortening the distance d1 is particularly valuable for vehicle transmissions which are equipped with electric retarders such as is the case of : the:preferred one illus~rated in figure 1.
In this transmission, the electric retarder considered is of the type - known under the trademark "FOCAL" - which is cantilevered, with a horizontal or substantially horizontal axis, on the output of the casing 15 of the gearbox of the vehicle considered.
This retarder comprises an inductor stator 16 and an induced rotor 17.
The stator 16 comprises a flange of a substantially annular shape 18 which carries a ring of coils 19, even in number, adapted so as to form by their ends two annular successions of flat magnetic poles with polarities alternatlng rom one to the next.
Flange 18 is mounted on the gearbox casing 15 - or more precisely on an intermediate mount 20 itself fixed against the 1at ront face P of said casing 15 - via a structure 21 in the form of a star or an apertured bell and tubular spacers 22.
Rotor 17 comprises two ferromagnetic material discs 23 adapted to surround the stator axially and so~that each : one travels past a succession of poles of this stator from 30 which they~are separated by~a small olearance or airgap e.
~ Each disc 23 is;connected to~ a fixing ring 24 by a : ring of curved arms 25 forming ventilation fins and the : two :fixing ;rings 24 :are~:bolted~ by means of bolt-nut :
systems 26 on an intermed:iate~:annulus:~27.
~ The central:portion of:the~gearbox:~mount 20 has the form~of a cylindrical nase 29 carrying, via an end bearing : ' : : :~ ' ' : ,-' : . ~ : :
2 ~
30, a sleeve 31 whose external axial end is extended radially by flange 10, called in the present text "gearbox flange".
The other axial end of sleeve 31 is splined inwardly at 32 and is force fitted on the end piece 33 of the gearbox, which is splined externally at 34.
Such force fitting is provided so as to avoid any 10 creation of play and it is then maintained by screwing axially, into end piece 33, screws 35 whose heads are applied against a plate 36 itself bearing on sleeve 31.
The rotor annulus 27 is fixed to the gearbox flange 10 in the way explained in the above mentioned patent.
In other words :
- the periphery of this flange 10 is enlarged and comprises a ring of fixing elements 37, - and annulus 27 is an external collar provided at an axial end of a tubular insert 38 ribbed inwardly at 39, 20 whose other axial end is extended by an internal collar 40 itself fixed axially against the enlarged periphery of flange 10 and flxed thereon.
SuGh fixing is obtained by cooperation of appropriate means with means 37, these appropriate means 25 being in particular holes 41 and nuts 42 if said means 37 are stud bolts.
As mentioned above, the above described arrangements make it possible to give a very low value to~the distance D between plane P and the centre 0 of the~journal cross 6, 30 thls~distance being able to be reduced~to a value of only 170 mm for a retarder whose diameter is about 500 mm; more precisely, said~ distance D is formed of distance d2 between plane P and face F ;along which the two flanges 10 and l are mutually applied, which distance is difficult to ~; ~ 35 reduce below~ 115 mm when the~gearbox flange 10 supports the rotor of a retarder, and~distance dl between said face F and centre 0, which distance~is here reduced to the very low value of 55 mm.
:
'' ` :, ' -2:~
Following which, and whatever the embodiment adopted, a cardan joint is finally obtained in which the distance between the face of application of the flange and the centre oE the journal cross is extremely small, which makes its use very advantageous in a transmission equipped with an electric retarder of FOCAL type when this transmission must be very short and so extended to a minimum by the positioning of such a retarder.
It should be noted that the provision of apertures 9 in flange 1 weakens this flange mechanically.
But such weakening is of no real disadvantage from the point of view of transmission of drive torques from journal 6 to the mounting flange 10.
In fact, the whole of such torques is transmitted at the level of the two lugs 2 and it is thereore solely at the base of these two lugs, between these bases and the mounting flange 10, that it is necessary to provide a large mechanically strong metal section, which is the case.
In other words, the sole purpose here of spacers 11 and 12 is to maintain the two lugs 2 parallel and spaced apart, they play no part in the transfer of torque.
This observation may explain the prejudice which might exist before the invention with respect -to the recessing of flange 1 which is claimed here.
As is evident, and as it re~sults moreover already from what has gone before, the invention is in no wise limited~ to those of its modes of~ application and embodiments which~have been more especially considered; it 30 embraces, on the contrary,~ all~ the ~ variants thereof, particularly those in which the cardan joint with apertured~flange such as defined above, combined possibly ; with a corresponding apertured mountlng flange,~ is used in a vehicle transmission not ~equlpped~ with an electric 35 retarder of FOCAL type.
:
~: :
Apart from these main arrangements, the invention comprises certain other arrangements which are preferably used at the same time and which will be more explicitly discussed hereafter.
In what follows, one embodiment of the invention will be described with reference to the accompanying drawings in a way which is of course in no wise limitative.
Figure 1 of these drawings shows in axial section a part of a vehicle transmission equipped with~an electric ;retarder and comprising~ a cardan joint according to the invention;
~Figures 2 and;3 show on a larger scale, respectively in an end view in the direction of arrow II of figure 3 and in axial section~through III-III of figure 2, one of the~parts~forming~said~cardan~joint.
~` The cardan Jolnt~in quest~ion~comprises :
- a fixing flange l integral with~a first fork 2 defining two bearings 3 (figures 2 and 3)~,~ said flange having a :
: ~' . ~:
.
:
flat or substantially flat transverse end face with a generally circular contour adapted to be applied axially against a complementary flat transverse face of another flange described further on, - a second fork 4 defining two other bearings (not shown) and integral with a shaft section 5, - and a journal cross 6 comprising four journals 7, 8 adapted for cooperating respectively two by two with the bearings of the forks 2 and 4 with interpositioning of needle bearings or similar.
In general, this joint is associated with a second identical joint provided at the opposite axial end of the shaft section 5j which provides a homocinetic transmission between the two end flanges of the two cardan joints, the assembly forming a double cardan shat.
The problem which arises is that of reducing as much as possible the distance between the centre O of the journal cross of one at least of the two cardan joints and the flat face F for mounting the corresponding flange so that, for a given distance between the two mounting faces which are generaIly parallel of the two flanges of the double cardan shaft, a maximum distance is maintalned between the centres of the two ~ournal crosses and the angular free movements of said shaft are hindered as little as possible.
For thls, two apertures 9 are formed through flange 1 for receiving the two arms of~fork 4 when the axis of the shaft section 5 is highly slanted with respect to the axis of the flan~e.
In the preferred embodiment illustrated, ~the 1ange lO~on which the cardan flange l~is ;to be ~flxed ~has also been formed with cavities ll disposed opposite apertures 9 and capable of receiving, like~these apertures, the arms of fork 4.
With these arrangements,~the angular movements of the shaft section 5 about the~ axls~common to the two :
: `
`` 2 ~
journals 7 are no longer limited by the arms of said fork 4 abutting against flange 1, which makes it possible, all other things being equal, to place the centre 0 closer to face F, i.e. reduce the distance dl.
Thus, by way of example, with a construction of the kind illustrated in the drawings and corresponding to the above mentioned dimensions, it is possible to reduce the value of said distance dl from 85 mm to 55 mm.
The gain thus obtained in shor~ening the axial distance dl ~lS doubled if the two cardan joints of the double cardan shaft considered are both construated in the above way.
In the numerical example which has just been given, the axial gain obtained is then 60 mm.
In the embodiment illustrated, the first fork 2 is formed by two lugs having the general form of thick parallel plates with a triangular contour formed with bearings 3 and the bases of these two lugs are ~oined together by three parallel spacers forming part of flange 1, namely a central spacer 11 and two edge spacers 12.
These ~.three spacers define between them in twos the apertures g. : , The central spacer 11 has the form of ;a thick rectilinear bar whose cross section is defined by an :
isosceles triangle with rounded corners: thus, this bar has, faoing the ~ournal cross, slantlng faces 111, which allows the maximum free angular movement of~this journal cross as can be seen in figure 1. ~
The edge~ spacers~l2 ;are~ mlted ;outwardly by portions of a continuous~ cylindrical ~face of revolution 121~extending over the~ whole periphery;of flange 1.~ ~
They are~de~flned lnwardly~by portions of a spherical face 122 centred on the ~entre 0~of journal cross 6.
These can also~bè~sèen in figures 2 and 3 : ~
35 ~ stepped~bores 12~formed in lugs 2, for recèiving the bolts or stud bolts for~;flxing flange~l on flange 10, , : :
:. ~ .
- annular grooves 13 formed in bearings 3 for receiving locking washers of the circlip type, - and parallel teeth 14 provided on the fixing face of flange 1 and adapted for cooperating with complementary teeth provided on flange 10.
The gain obtained in shortening the distance d1 is particularly valuable for vehicle transmissions which are equipped with electric retarders such as is the case of : the:preferred one illus~rated in figure 1.
In this transmission, the electric retarder considered is of the type - known under the trademark "FOCAL" - which is cantilevered, with a horizontal or substantially horizontal axis, on the output of the casing 15 of the gearbox of the vehicle considered.
This retarder comprises an inductor stator 16 and an induced rotor 17.
The stator 16 comprises a flange of a substantially annular shape 18 which carries a ring of coils 19, even in number, adapted so as to form by their ends two annular successions of flat magnetic poles with polarities alternatlng rom one to the next.
Flange 18 is mounted on the gearbox casing 15 - or more precisely on an intermediate mount 20 itself fixed against the 1at ront face P of said casing 15 - via a structure 21 in the form of a star or an apertured bell and tubular spacers 22.
Rotor 17 comprises two ferromagnetic material discs 23 adapted to surround the stator axially and so~that each : one travels past a succession of poles of this stator from 30 which they~are separated by~a small olearance or airgap e.
~ Each disc 23 is;connected to~ a fixing ring 24 by a : ring of curved arms 25 forming ventilation fins and the : two :fixing ;rings 24 :are~:bolted~ by means of bolt-nut :
systems 26 on an intermed:iate~:annulus:~27.
~ The central:portion of:the~gearbox:~mount 20 has the form~of a cylindrical nase 29 carrying, via an end bearing : ' : : :~ ' ' : ,-' : . ~ : :
2 ~
30, a sleeve 31 whose external axial end is extended radially by flange 10, called in the present text "gearbox flange".
The other axial end of sleeve 31 is splined inwardly at 32 and is force fitted on the end piece 33 of the gearbox, which is splined externally at 34.
Such force fitting is provided so as to avoid any 10 creation of play and it is then maintained by screwing axially, into end piece 33, screws 35 whose heads are applied against a plate 36 itself bearing on sleeve 31.
The rotor annulus 27 is fixed to the gearbox flange 10 in the way explained in the above mentioned patent.
In other words :
- the periphery of this flange 10 is enlarged and comprises a ring of fixing elements 37, - and annulus 27 is an external collar provided at an axial end of a tubular insert 38 ribbed inwardly at 39, 20 whose other axial end is extended by an internal collar 40 itself fixed axially against the enlarged periphery of flange 10 and flxed thereon.
SuGh fixing is obtained by cooperation of appropriate means with means 37, these appropriate means 25 being in particular holes 41 and nuts 42 if said means 37 are stud bolts.
As mentioned above, the above described arrangements make it possible to give a very low value to~the distance D between plane P and the centre 0 of the~journal cross 6, 30 thls~distance being able to be reduced~to a value of only 170 mm for a retarder whose diameter is about 500 mm; more precisely, said~ distance D is formed of distance d2 between plane P and face F ;along which the two flanges 10 and l are mutually applied, which distance is difficult to ~; ~ 35 reduce below~ 115 mm when the~gearbox flange 10 supports the rotor of a retarder, and~distance dl between said face F and centre 0, which distance~is here reduced to the very low value of 55 mm.
:
'' ` :, ' -2:~
Following which, and whatever the embodiment adopted, a cardan joint is finally obtained in which the distance between the face of application of the flange and the centre oE the journal cross is extremely small, which makes its use very advantageous in a transmission equipped with an electric retarder of FOCAL type when this transmission must be very short and so extended to a minimum by the positioning of such a retarder.
It should be noted that the provision of apertures 9 in flange 1 weakens this flange mechanically.
But such weakening is of no real disadvantage from the point of view of transmission of drive torques from journal 6 to the mounting flange 10.
In fact, the whole of such torques is transmitted at the level of the two lugs 2 and it is thereore solely at the base of these two lugs, between these bases and the mounting flange 10, that it is necessary to provide a large mechanically strong metal section, which is the case.
In other words, the sole purpose here of spacers 11 and 12 is to maintain the two lugs 2 parallel and spaced apart, they play no part in the transfer of torque.
This observation may explain the prejudice which might exist before the invention with respect -to the recessing of flange 1 which is claimed here.
As is evident, and as it re~sults moreover already from what has gone before, the invention is in no wise limited~ to those of its modes of~ application and embodiments which~have been more especially considered; it 30 embraces, on the contrary,~ all~ the ~ variants thereof, particularly those in which the cardan joint with apertured~flange such as defined above, combined possibly ; with a corresponding apertured mountlng flange,~ is used in a vehicle transmission not ~equlpped~ with an electric 35 retarder of FOCAL type.
:
~: :
Claims (7)
1. Cardan joint comprising a first fork (2) integral with an assembly flange having a flat end face (1) formed with fixing holes (12), a second fork (4) integral with a shaft section (5) and a journal cross (6) whose four journals (7, 8) are mounted in twos on the two forks with interpositioning of needle bearings or similar, characterized in that the flange (1) integral with one of its two forks (2) is formed axially with two through apertures(9) adapted to receive the arms of the other fork (4) when the bending angle of the joint is large, which apertures are separated from each other by a central spacer (11).
2. Cardan joint according to claim 1, characterized in that the contour of the flat end face of the flange (1) of the joint is circular.
3. Cardan joint according to claim 1, characterized in that the fork (2) integral with the flange (1) of the joint is formed by two parallel lugs formed respectively with two coaxial bearings (3) and in that the bases of these two lugs are joined together by three parallel spacers (11, 12) defining the above apertures (9) in twos.
4. Cardan joint according to claims 2 and 3, characterized in that the two end spacers (12) are defined outwardly by a cylindrical face of revolution about the axis of the flange (1) and inwardly by portions of a sphere centred on the centre (0) of the journal cross (6).
5. Cardan joint according to claim 3, characterized in that the central spacer (11) has the form of a thick cylindrical bar whose cross section has the general shape of a curvilinear triangle.
6. Vehicle transmission equipped with at lest one cardan joint according to claim 1, comprising a flange (10) on which the flange (1) of said cardan joint is fixed, characterized in that this flange (10) is itself formed with cavities (11) disposed opposite the apertures (9) in the flange (1) of the joint and adapted to receive also the arms of the other fork (4) when the bending angle of the joint is large.
7. Vehicle transmission equipped with at least one cardan joint according to claim 1 fixed on a "gearbox flange" (10) carrying the rotor of an electric retarder, characterized in that this rotor is mounted on said gearbox flange on the: enlarged periphery of this flange, via a tubular insert (38, 39).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8908463A FR2648881B1 (en) | 1989-06-26 | 1989-06-26 | SHORT CARDAN JOINTS AND VEHICLE TRANSMISSION EQUIPPED WITH SUCH A JOINT AND PREFERABLY AN ELECTRIC RETARDER |
| FR8908463 | 1989-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2019623A1 true CA2019623A1 (en) | 1990-12-26 |
Family
ID=9383109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002019623A Abandoned CA2019623A1 (en) | 1989-06-26 | 1990-06-22 | Short cardan joint and vehicle transmission equipped with such a joint, and preferably with an electric retarder |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0406085A1 (en) |
| JP (1) | JPH0337419A (en) |
| KR (1) | KR910000337A (en) |
| CA (1) | CA2019623A1 (en) |
| FR (1) | FR2648881B1 (en) |
| PT (1) | PT94490A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2110861B1 (en) * | 1993-01-29 | 1999-04-01 | Frenos Electricos Unidos Sa | INTERLAYER PIECE FOR THE INSTALLATION OF AN ELECTROMAGNETIC SLOWER ON THE REAR BRIDGE OF A VEHICLE AND FACILITIES INCLUDING SUCH A PART. |
| DE19718896A1 (en) * | 1997-05-03 | 1998-11-05 | Man Nutzfahrzeuge Ag | Universal joint connection between a propeller shaft and an output or drive shaft of a transmission, in particular a commercial vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2058819A (en) * | 1933-08-04 | 1936-10-27 | Joseph E Padgett | Universal joint |
| US2597240A (en) * | 1945-07-23 | 1952-05-20 | Anton F Greiner | Universal joint |
| GB687286A (en) * | 1950-03-18 | 1953-02-11 | Tom Edgerton Clarke Hirst | Power transmission joint |
| BE792509A (en) * | 1971-12-08 | 1973-06-08 | Labavia | IMPROVEMENTS IN TRANSMISSIONS OF VEHICLES EQUIPPED WITH A RETARDER |
| EP0094468A1 (en) * | 1982-05-14 | 1983-11-23 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Cardan joint connection |
| DE3321349A1 (en) * | 1983-06-13 | 1984-12-13 | Uni-Cardan Ag, 5200 Siegburg | Universal joint |
-
1989
- 1989-06-26 FR FR8908463A patent/FR2648881B1/en not_active Expired - Fee Related
-
1990
- 1990-06-22 CA CA002019623A patent/CA2019623A1/en not_active Abandoned
- 1990-06-25 KR KR1019900009418A patent/KR910000337A/en not_active Application Discontinuation
- 1990-06-25 PT PT94490A patent/PT94490A/en not_active Application Discontinuation
- 1990-06-25 EP EP90401797A patent/EP0406085A1/en not_active Withdrawn
- 1990-06-26 JP JP2168145A patent/JPH0337419A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2648881A1 (en) | 1990-12-28 |
| EP0406085A1 (en) | 1991-01-02 |
| FR2648881B1 (en) | 1995-02-03 |
| KR910000337A (en) | 1991-01-29 |
| PT94490A (en) | 1992-06-30 |
| JPH0337419A (en) | 1991-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5387157A (en) | Flexible disc-like coupling element | |
| AU604157B2 (en) | Improvements relating to disc brakes | |
| US4365488A (en) | Universal joint | |
| US4802882A (en) | Diaphragm disk assembly for torque transmitting joint and process for its fabrication | |
| US20050277480A1 (en) | Flange assembly for supporting a bearing and an end fitting in a driveshaft assembly | |
| MX2007001178A (en) | Ribbed cover for drive axle housing. | |
| CN102099244A (en) | Crank set for a bicycle | |
| US4090751A (en) | Wheel bearing assembly for a wheel hub of a motor vehicle | |
| IE47823B1 (en) | Hookes joint yoke | |
| IE50489B1 (en) | Flexible couplings | |
| US6857786B2 (en) | Constant velocity joint integrated to wheel bearing and to axially adjustable hub | |
| JP2000079803A (en) | Wheel hub flange and brake rotor assembly | |
| EP0816128B1 (en) | Hub-wheel assembly, in particular for a vehicle | |
| US3871709A (en) | Aircraft wheel construction | |
| CA1196946A (en) | Electric eddy current retarder | |
| CA2019623A1 (en) | Short cardan joint and vehicle transmission equipped with such a joint, and preferably with an electric retarder | |
| US5044227A (en) | Vehicle transmissions equipped with electric retarders | |
| US5115693A (en) | Transmissions of vehicles equipped with electric retarders | |
| US5044228A (en) | Vehicle transmissions equipped with electric retarders | |
| US5938291A (en) | Wheels | |
| EP0705396A1 (en) | Aircraft brake torque transfer assembly | |
| EP0980987A2 (en) | Constant velocity flexible coupling | |
| US5951400A (en) | Flexible coupling for use between two shafts | |
| CA1220363A (en) | Drive system for railroad track vehicle | |
| US6554713B2 (en) | Coupling for coupling two shafts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |