WO2019211244A1

WO2019211244A1 - Transmission device for a motor vehicle

Info

Publication number: WO2019211244A1
Application number: PCT/EP2019/060951
Authority: WO
Inventors: Thierry Guinot; Jean-François BOUGARD
Original assignee: Valeo Embrayages
Priority date: 2018-05-04
Filing date: 2019-04-29
Publication date: 2019-11-07

Abstract

The invention relates to a torque transmission device (1), comprising: - a torque input element (2) which rotates about an axis (X) and can be rotationally coupled to a crankshaft of a combustion engine, - a first torque output element (3) which can be rotationally coupled to a first input shaft of a gearbox, - an input plate (5) arranged between the torque input element (2) and the torque output element (3), - an input clutch (10) fed by a fluid line (37), selectively and frictionally coupling the torque input element (2) and the input plate (5), - a first output clutch (20) selectively and frictionally coupling the input plate (5) and the first torque output element (3), - an actuating member (40) associated with the input clutch (10), and - a rolling-bearing member of the input element (47), in which the fluid line (37) is located radially between the actuating member (40) and the rolling-bearing member of the input element (47).

Description

Transmission device for a motor vehicle

The present invention relates to the field of transmissions for motor vehicles. It relates in particular to a torque transmission device intended to be arranged in the drive train of a motor vehicle, between a heat engine and a gearbox.

The invention more specifically relates to a torque transmission device for a hybrid type of motor vehicle in which a rotating electrical machine is arranged in the traction chain.

In the state of the art, it is known hybrid type of motor vehicles comprising a torque transmission device disposed between an internal combustion engine and a gearbox, a rotating electrical machine and a clutch and a gearbox. actuation of this clutch for coupling or uncoupling in rotation a crankshaft of the internal combustion engine to a rotor of the rotating electrical machine. Thus, it is possible to shut down the internal combustion engine at each stop of the vehicle and restart it with the rotating electric machine. The rotating electrical machine can also constitute an electric brake or bring a surplus of energy to the internal combustion engine to assist or prevent it from stalling. When the internal combustion engine is in operation, the electric machine can act as an alternator. The rotating electrical machine can also drive the vehicle independently of the internal combustion engine.

Such a rotating electrical machine may be in line with the torque transmission device, that is to say that the rotational speed of the rotor of the rotating eclectic machine coincides with the axis of rotation of the torque transmission device. As a variant, the rotating electrical machine can be offset relative to the torque transmission device, that is to say that the rotational speed of the rotor of the rotating eclectic machine is offset from the axis of rotation of the transmission device. couple.

An internal combustion engine has acyclisms due to successive explosions in the cylinders of the internal combustion engine, the frequency of the acyclisms varying in particular as a function of the number of cylinders and the rotational speed of the internal combustion engine. In order to filter the vibrations generated by the acyclisms of the internal combustion engine, it is known to integrate torsion damping dampers with elastic members in the torque transmission devices. In the absence of such dampers, vibrations entering the gearbox would cause in operation shock, noise or noise particularly undesirable. Such dampers are conventionally arranged between the internal combustion engine and the rotary electric machine and form with the clutch the torque transmission device. Such a device is for example disclosed in the document FR3015380. The architecture of the torque transmission devices is becoming more compact and it is sometimes difficult to house all the components. Thus, because of the presence of the rotating electrical machine, it is necessary to position the actuating member of the clutch on the side of the engine, which poses a number of problems including the fluid supply of the clutch and its actuator.

In the current developments of hybrid vehicles, it is necessary to implant the rotating electrical machine torque transmission device without this does not impact the axial compactness and radial. Due to the presence of a wet-type clutch, it was necessary to design a torque transmission device for supplying fluid to the clutch and its actuator without changing the size of the torque transmission device. This search for axial and radial compactness is the basis of the invention.

In the state of the art, it is known devices in which the supply of fluid for cooling the clutches, including the input clutch, is side gearbox, in particular through one of input shafts of the gearbox, which complicates the manufacture of the gearbox.

The invention aims to improve the existing design by benefiting from a torque transmission device to reconcile the requirements of axial and radial compactness while ensuring a good supply of fluid clutch, including cooling fluid.

The invention achieves this, in one of its aspects, by means of a torque transmission device, in particular for a motor vehicle, comprising: a torque input element rotating about an axis X, able to be coupled in rotation to a crankshaft of a heat engine,

a first torque output element adapted to be coupled in rotation to a first input shaft of a gearbox,

an inlet web arranged between the torque input element and the torque output element, in the torque transmission sense,

an input clutch fed by a fluid line, selectively coupling and friction coupling the torque input element and the inlet web;

a first output clutch selectively and frictionally coupling the input web and the first torque output element,

an actuating member associated with the input clutch, and

a bearing member supporting the input element,

wherein the fluid channel is located radially between the actuator and the support bearing member of the input member.

This architecture thus makes it possible to inject the fluid at the inlet of the inlet clutch in order to guarantee an optimal cooling of the latter and this in a reduced axial space requirement.

In the remainder of the description and the claims, the terms "before" or "backward" depending on the direction with respect to an axial orientation determined by the principal axis X will be used in a nonlimiting manner and in order to facilitate understanding thereof. of rotation of the transmission of the motor vehicle and the terms "inner / inner" or "outer / outer" with respect to the axis X and in a radial orientation, orthogonal to said axial orientation.

According to another aspect of the invention, the fluid is a cooling fluid. According to one aspect of the invention, the device further comprises a protective casing. The protective casing consists of a radial wall and an axial portion. Advantageously, the radial wall and the axial portion are in one piece.

Advantageously, the protective casing is arranged to at least partially enclose the torque input element, the torque output element, the input clutch, the output clutch, the inlet web, rolling member supporting the input element and the actuating member of the clutch.

The protective casing can be fixed to the internal combustion engine by means of fixing means, for example of the screw or rivet type. According to one aspect of the invention, the fluid channel extends axially in the axial portion of the protective casing. The integration of the fluid line in the axial portion of the protective casing and not in a shaft of the gearbox reduces the number of components of the device, reduce its size and contributes to increasing the standardization of its components.

Advantageously, the fluid channel extends axially between the two axial ends of the axial portion of the protective casing. In such a case, the pipe is an integral part of the axial portion of the protective casing and does not just cross it radially.

According to another aspect of the invention, the fluid channel has an axially oriented outlet orifice.

According to another aspect of the invention, the outlet orifice opens axially beyond the support bearing member of the input element.

According to another aspect of the invention, the outlet orifice is located at the right of a multidiscque assembly of the input clutch.

According to another aspect of the invention, the fluid channel extends between an inlet orifice and an outlet orifice, the inlet orifice being located in the radial wall and the outlet orifice in the axial portion. .

According to another aspect of the invention, the support bearing member of the input element is disposed between the radial end of the protective housing, advantageously the inner end of the protective housing and an axial portion of the input element.

According to another aspect of the present invention, the support bearing member of the entry element may be composed of an inner ring in contact with the torque entry element and an outer ring in contact with the protective casing, in particular the axial portion of the protective casing.

According to another aspect of the invention, the device further comprises a second output element, able to be coupled in rotation to a second input shaft of a gearbox, a second output clutch, coupling selectively and by friction the entry veil and the second torque output member. For the purposes of the present application, the first output clutch is that located radially outward, that is to say the furthest from the axis of rotation X of the device. The second outlet clutch being that located radially inward, that is to say the closest to the axis of rotation of the device.

According to one aspect of the invention, the first output clutch, the second output clutch and the input clutch, radially succeed one another in approaching the X axis. This sequence makes it possible to stack the elements radially so that there is a compact device axially. This sequence thus makes it possible to limit the impact of the device on the axial size of the transmission chain.

In the sense of the invention, the radial succession is understood in terms of radial distance. Advantageously, the various elements mentioned above do not intersect radially, that is to say they are successively one under the other.

According to another aspect of the invention, there is a plane perpendicular to the axis of rotation which intersects both the input clutch and the output clutches.

According to a further feature of the invention, the input clutch and / or the first output clutch comprise:

an input disk carrier integral in rotation with the torque input element for the input clutch, and integral in rotation with the entry web for the first output clutch,

an outlet disk carrier integral in rotation with the entry web for the input clutch, and integral in rotation with the first output element for the first output clutch, and

a multi-disk assembly comprising at least one friction disk integral in rotation with one of the input and output disk carriers, at least two plates respectively arranged on either side of each friction disk, integral in rotation on the other hand, inlet and outlet disc holders and friction linings disposed between the platens and a friction disc, the input clutch and / or the first output clutch describing a disengaged position and a position engaged in which said trays and the friction disk pinch the friction liners so as to transmit torque between the input disk carrier and the output disk carrier. According to another aspect of the invention, the device comprises a plurality of fluid ducts distributed circumferentially about the X axis, intended to ensure the cooling and lubrication of the multi-disk assemblies of the clutches of the present invention, and in particular the clutch input.

According to an additional aspect of the invention, the input disk carrier and the output disk carrier of each of the input and output clutches comprise radial orifices distributed circumferentially around the X axis and intended to allow a circulating the coolant radially outwardly through the multi-disk assembly of each of the clutches from the fluid line located in the guard.

According to another aspect of the invention, the device further comprises an actuating member associated with the first output clutch and an actuating member associated with the second output clutch. Said actuating members associated with the first and second output clutch being able to be arranged in a housing of the gearbox. The actuating members associated with the first and second output clutches belong to a hydraulic control system.

According to a particular embodiment, the actuating members associated with the first and second output clutches can be stacked radially.

According to one aspect of the invention, each actuating member of the present invention may comprise an annular piston mounted to slide axially outside an inner tube, the piston and the tube forming an actuating chamber. The actuating member may also comprise a rotary stop carried by the piston and cooperating with the force transmission member. This actuator is also called "CSC" type actuator ("Concentric Slave Cylinder" in English). The operating chamber can be sealed and filled with oil. The piston and the tube are fixed in rotation so that the actuating chamber and the oil do not rotate.

According to one aspect of the invention, the rotary stop may be a bearing, in particular a rolling bearing. The rolling bearing may comprise an inner ring attached to the piston, an outer ring bearing against the body of transmission of force and rolling bodies interposed between the inner ring and the outer ring. Preferably, the rolling bodies may be balls.

Each piston can be of revolution around the axis of rotation.

The shapes of the piston and / or the actuating member are thus chosen so that the clutch and its actuator can stack radially which contributes to the axial compactness of the device.

According to another aspect of the invention, the device further comprises a transmission member associated with the input clutch which makes it possible to orient the fluid from the fluid duct, in particular from the outlet orifice, towards the clutch input. As a result, the fluid is guided and oriented to be precisely injected into the input clutch.

According to another aspect of the invention, a bearing seal is located axially between the rolling bearing of the actuating member of the input clutch and the transmission member associated with the input clutch. Thanks to this architecture, the fluid is necessarily directed towards the input clutch.

According to another aspect of the invention, the device further comprises a force transmission member for each of the first output clutch and the second output clutch. Each force transmission member of the present invention being axially movable to transmit the actuating force from the actuating member to the associated clutch.

Each force transmission member may have a curved outer radial end defining a bearing surface for exerting axial force on the multi-disk assembly. Each force transmission member may have an inner radial end with which it cooperates with the associated actuating member.

This bearing surface may bear against the end plate of the multi-disk assembly. The bearing surface can be continuous. The outer radial end may be a continuous ring so that the bearing surface is continuous. The outer radial end may comprise a plurality of fingers of axial extension and distributed around the axis so that the bearing surface is discontinuous. Each force transmission member, in particular the power transmission member of the input clutch, may have three elbows between which plane portions are interposed. This allows axially compact operation.

According to another aspect of the invention, the device further comprises an intermediate element arranged between the torque input element on the one hand and the first torque output element or the torque output elements on the other hand. , in the sense of torque transmission, the intermediate element comprising an electrical connection zone adapted to be rotatably connected to a rotating electrical machine about an axis parallel to the axis of rotation X.

The electrical machine is called "off-line" because the axis of rotation of the rotating electrical machine is offset from the axis of rotation of the torque transmission device.

According to one aspect of the invention, the electrical connection zone is axially offset from the input clutch and / or output clutches.

The electrical connection area may be welded, riveted or integrally with the remainder of the intermediate member.

This arrangement makes it possible to position the electric machine according to the space available in the vehicle's drivetrain. This arrangement makes it possible in particular not to have to arrange the electric machine axially following the clutches, which would be negative for the axial compactness. This arrangement makes it possible in particular not to have to arrange the electrical machine radially beyond the clutches, which would be negative for the radial compactness.

According to an additional aspect of the invention, the electrical connection zone of the intermediate element comprises a ring gear adapted to be meshed directly by a pinion of the rotating electrical machine.

According to another characteristic of the invention, the ring has a helical toothing complementary shape to the pinion of the rotating electrical machine.

Alternatively, a chain or belt can be used to connect the rotating electrical machine to the electrical connection area. According to one aspect of the invention, the electrical connection zone may be axially offset from the hydraulic control system. Alternatively, the electrical connection zone may be radially to the right of the hydraulic control system.

Alternatively, it can be provided that the intermediate element defines a rotor support of an electric machine in rotation about the axis of rotation. The electric machine is then "in-line".

According to the invention, the clutches, namely the input clutch and the first and second output clutch can be multidisc type.

According to one characteristic of the invention, the input and output clutches are wet. The clutches being contained in at least one sealed chamber filled with a fluid, especially oil. For the purposes of the present application, a wet clutch is a clutch which is adapted to operate in an oil bath.

The invention also relates to a hybrid transmission module for a motor vehicle, comprising a torque transmission device according to the characteristics mentioned above and a rotating electrical machine, in which the intermediate element comprising the electrical connection zone is connected to the machine. electrical rotating so that the rotation axis of the rotating electrical machine is offset from the axis of rotation (X) of the torque transmission device.

Advantageously, the torque transmission device according to the present invention is connected to a 48V or high voltage electric motor with a set of gears.

The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely for illustrative purposes and not limiting, with reference to the appended figures.

Figure 1 is a sectional view of the torque transmission device according to one embodiment of the invention.

Figure 2 is a sectional view of a hybrid transmission module and a rotating electrical machine. In relation to FIG. 1, a torque transmission device 1 comprising:

a torque input element 2, rotating about an axis of rotation X, able to be coupled in rotation to a crankshaft of a heat engine (not shown),

a first torque output element 3, able to be coupled in rotation to a first input shaft of a gearbox (not represented),

a second torque output element 4, able to be coupled in rotation to a second input shaft of a gearbox (not shown) and an input sail arranged between the input element of the gearbox torque 2 and the first and second output elements 3, 4 of torque within the meaning of the present invention.

In the example considered, the second output element 4 is arranged in parallel with the first output element 3 in the torque transmission sense. Each of these elements rotates about an axis of rotation X of the device.

The first and second output elements 3, 4 respectively comprise a first and second output interface 3a, 4a whose inner periphery is grooved and adapted to cooperate respectively with a first and a second gearbox shaft.

A torsion damper device (not shown) can be positioned between the crankshaft of the engine and the torque input member 2.

In the example considered, the device further comprises an input clutch 10 arranged between the torque input element 2 and the input web 5 in the torque transmission sense.

The input clutch 10 selectively and frictionally couples the torque input element 2 and the input web 5 and comprises:

an input disk carrier 11 integral in rotation with the torque input element 2,

an outlet disk carrier 12 integral in rotation with the inlet web 5 and

a multi-disk assembly 13 comprising a plurality of friction disks, here four, integral in rotation with the output disk carrier 12, a plurality of trays respectively arranged on each side of each friction disk, integral in rotation of the input disk carrier 11 and friction linings disposed between the plates and a friction disc, fixed on each side of the friction discs, clutch 10 describing a disengaged position and an engaged position in which said platens and the friction disk pinch the friction liners so as to transmit torque between the input disk carrier and the output disk carrier.

Each disk carrier 11, 12 synchronizes in rotation all the trays and the set of friction discs. Each disc holder 11, 12 has a cylindrical skirt on which the trays and the friction discs are mounted.

The friction discs of the multi-disc assembly 13 cooperate with the cylindrical skirt of the input disc carrier 11 along their radially inner periphery by fluting. The friction discs are radially outwardly of the cylindrical skirt.

The trays of the multi-disk assembly 13 cooperate with the cylindrical skirt of the output disk carrier 12 according to their radially outer periphery by fluting. The trays are therefore radially inside the cylindrical skirt.

In the example considered, the device also comprises a first output clutch 20 selectively and frictionally coupling the inlet web 5 and the first output element 3.

Thus, the first output clutch 20 comprises:

an input disk carrier 21, integral in rotation with the entry web,

an outlet disk carrier 22 integral in rotation with the first output element 3 and,

a multi-disk assembly 23 comprising a plurality of friction disks, here three, integral in rotation with the output disk carrier 22, a plurality of trays respectively disposed on either side of each friction disk, integral in rotation with the disk carrier; inlet 21 and friction linings disposed between the plates and a friction disk, fixed on each side of the friction discs, the clutch 20 describing a disengaged position and an engaged position in which said plates and the friction disc pinches the friction liners to transmit torque between the input disk carrier and the output disk carrier.

Each disc holder 21, 22 has a cylindrical skirt on which the trays and the friction discs are mounted.

The friction discs of the multidisk assembly 23 cooperate with the cylindrical skirt of the output disk carrier 22 according to their radially outer periphery by fluting. The friction discs are therefore radially inside the cylindrical skirt.

The trays of the multidisk assembly 23 cooperate with the cylindrical skirt of the inlet disk carrier 21 according to their radially outer periphery by splines. The trays are therefore radially inside the cylindrical skirt.

In the example considered, the device 1 comprises a second output clutch 30, selectively and frictionally coupling the inlet web 5 and the first output element 4.

The second output clutch 30 comprises:

an inlet disk carrier 31 integral in rotation with the inlet web 5,

an outlet disk carrier 32 integral in rotation with the second output element 4 and,

a multidisk assembly 33 comprising a plurality of friction discs, here four.

The multidisk assembly 33 has the same technical characteristics as the multi-disk assembly of the clutch 20.

In common with the two clutches 10, 20 and 30, the linings may be fixed to the friction discs, in particular by gluing, particularly by riveting, in particular by overmolding. Alternatively, the fittings are fixed on the trays.

Each disk carrier 11, 12, 21, 22, 31, 32 can synchronize in rotation all the trays or all of the friction discs.

According to one aspect of the invention, the trays can be integral in rotation with the input disk carrier 11, 21, 31 and the friction disks can be integral with the output disk carrier 12, 22, 32. Alternatively, trays can be integral in rotation with the output disk carrier 12, 22, 32. The disks can be integral in rotation with the input disk carrier 1 1, 21, 31.

The clutches are wet type and have between two and seven friction discs, preferably four friction discs. Such multi-disk clutches can limit the radial height to limit the axial extent.

The output clutches 20, 30 may be arranged not to be simultaneously in the same engaged configuration. On the other hand, they can simultaneously be configured in their disengaged position.

In the example under consideration, the second output clutch 30, the first output clutch 20 and the input clutch 10 radially follow one another towards the X axis. There is a plane perpendicular to the axis of rotation which cuts both the output clutches 20, 30 and the input clutch 10.

Advantageously, the inlet web 5 is rotatably attached to the input disk carrier 21 of the first output clutch 20, by means of a splined connection and a circlip.

In the example considered, the device 1 further comprises a protective casing 46. The protective casing 46 consists of a radial wall 46a and an axial portion 46b.

In the example considered, the input clutch 10 is fed by a fluid line 37. The fluid line 37 extends axially in the axial portion 46b of the protective casing 46. Advantageously, the line 37 s extends axially between the two axial ends of the axial portion 46b.

Advantageously, the fluid channel 37 is made of material, that is to say in one piece with the axial portion 46b of the protective casing 46.

In the example considered, the fluid line 37 specifically feeds the input clutch 10. In fact, unlike many prior art devices in which the input clutch is supplied with fluid after the clutches of the clutch. As an output, the device of the present invention has the advantage of providing a specific cooling system for the input clutch, the latter being the first clutch supplied with fluid from the fluid line 37. In the example considered, the device 1 comprises an actuating member 40 and a force transmission member 41 associated with the input clutch 10. A holding member in the disengaged position can be provided to push the force transmission 41 of the input clutch 10. The input clutch is of the "normally open" type.

The force transmission member 41 is axially movable to transmit the actuating force of the actuating member 40 to the input clutch 10. The force transmission member exerts an axial force on the multi-disk assembly 13 for moving the trays to the disks. The actuation is thus of the "pushed" type.

The force transmission member 41 has a curved outer radial end defining a bearing surface for exerting the axial force on the multi-disk assembly, continuous or discontinuous in the example in question.

The force transmission member 41 of the input clutch 10 has three bends between which are interposed flat portions. This allows axially compact operation. This shape also makes it possible to orient and guide the fluid from the pipe 37 to the inlet clutch 10, and more particularly up to the multi-disk assembly 13 of the inlet clutch 10.

The actuating member 40 comprises an annular piston 42 mounted radially sliding. The piston 42 and the casing 46 together form an actuating chamber 43. The actuating member 40 comprises a rotary stop, which is here a rolling bearing 44, carried by the piston 42 and cooperating with an inner radial end of the force transmitting member 41.

The fluidic pressures associated with the "engaged" and "disengaged" positions are the pressures of the operating chamber 43.

The rolling bearing 44 has an outer ring attached to the piston, an inner ring bearing against the force transmission member and rolling bodies interposed between the inner ring and the outer ring. The piston 42 is of revolution about the axis of rotation X. In the example considered, the clutches 10, 20, 30 are arranged in a sealed chamber filled with oil, the protective casing 46 defines in part this sealed chamber.

In the example considered, the device 1 comprises a bearing member supporting the input element 47, here a ball bearing. The support bearing member of the input element 47 is disposed between the radial end of the protective casing 46, in particular of the axial portion 46b and an axial portion of the input element 2. A circlip is arranged on the fixed portion of the input element 2 so as to immobilize axially the rolling member 47.

In the example under consideration, the fluid line 37 has an axially oriented outlet orifice 39. Advantageously, the orifice 39 opens axially beyond the support bearing member of the input element 47.

In the example considered, the outlet orifice 39 is situated at the right of the multi-disk assembly 13 of the input clutch. This makes it possible to obtain a supply from the fluid line 37 which is more direct and simplified.

The protective casing 46 is arranged to at least partially enclose the torque input member 2, the torque output member (s) 3, 4, the input clutch 10, the output clutch (s) 20, 30, the inlet web 5, the support bearing member of the input element 47 and the actuating member of the clutch 40.

There is a plane perpendicular to the axis of rotation which intersects both the input clutch 10, the actuating member 40 of the input clutch 10 and the bearing member 47 supporting the input element 2.

In the example considered, a bearing member 49 supports the inlet web 5. The rolling member 49 is here a ball bearing, and is arranged radially between the inlet web 5 and the input element of couple 2.

In the example considered, the device 1 also comprises a hydraulic control system 80 comprising:

an actuating member 50 and a force transmission member 51 associated with the first output clutch 20. The force transmission member 51 is axially movable to transmit the actuating force of the actuating member 50 to the input clutch 20. an actuating member 60 and a force transmission member 61 associated with the second output clutch 30. The force transmission member 61 is axially movable to transmit the actuating force of the actuating member 60 to the second output clutch 30.

A holding member in the disengaged position may be provided to push back the force transmission members 51, 61 of the output clutches 20, 30. The output clutches 20, 30 are of the "normally open" type.

These actuating members 50, 60 have the same elements as those detailed in connection with the actuating member 40 of the input clutch, with the difference that they are housed in one and the same envelope and form only one single and same component conventionally called hydraulic control system or double concentric actuator. The shapes of the pistons and / or the actuating members 40, 50, 60 are chosen so that they can be stacked radially, which contributes to the axial compactness of the device 1.

The actuating members 50, 60 of the outlet clutches 20, 30, in particular their actuating chamber are stacked radially. The actuating members 50, 60 of the output clutches 20, 30 are on one side, axially speaking, first and second output members 3, 4 and the actuating member 40 of the input clutch 10. is on the other side of the first and second output elements 3, 4.

The force transmission members 51, 61 of the output clutches 20, 30 each have a curved outer radial end defining a bearing surface for exerting the axial force on the multi-disk assemblies, 23, 33. The actuation is thus of type "pushed".

In the example considered, the outer radial end of these two force transmission members 51, 61 comprises a plurality of axial extension fingers, respectively numbered 53, 63, and distributed around the X axis so that their bearing surface is discontinuous. In the example considered, the fingers 53 pass through openings in the intermediate element 5.

These fingers 53, 63 allow the force transmission members 51, 61 to be able to actuate the multi-disk assembly through the intermediate element 85. In the example considered, the intermediate element 85 comprises an electrical connection zone 65 able to be connected in rotation with a rotating electrical machine (not shown) about an axis parallel to the axis of rotation.

The electrical connection zone 65 is here axially offset clutches 10, 20, 30. The electrical machine is called "off-line" because it is not concentric to the drive shaft but on a parallel shaft. The electrical connection zone 65 is able to cooperate directly with a pinion of the rotating electrical machine.

The electrical connection zone 65 can be made in the form of a crown adapted to be geared directly by a pinion or indirectly (belt, chain ...) of the rotating electrical machine (not visible). The ring may have a helical toothing complementary shape to the pinion of the rotating electrical machine.

In the example considered, a support bearing member 48 of the inlet disk carrier 21, here a ball bearing, is arranged axially between the actuating members 50, 60 of the output clutches on the one hand and the elements of the exit 3, 4 on the other hand.

In the example considered, the device also comprises a first, a second and a third axial rolling member 70, 71, 72. The first axial rolling member 70 is positioned axially between the first and second output disk holders. 32. The second axial rolling member 71 is positioned axially between the second exit disk holder 32 and the support 81 of the hydraulic control system 80. The third axial rolling member 72 is positioned axially between the web of FIG. input 5 and the first output disk carrier 22.

FIG. 2 describes a hybrid transmission module for a motor vehicle, comprising a torque transmission device 1 and a so-called off-line rotating electrical machine. In the example considered, the intermediate element 85 comprising the electrical connection zone 65 is connected to the rotating electrical machine so that the axis of rotation of the rotating electrical machine is offset from the axis of rotation X of the device. torque transmission 1.

Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it is comprises all the technical equivalents of the means described and their combinations if they fall within the scope of the invention.

In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

1. Device (1) for transmitting torque, particularly for a motor vehicle, comprising:

a torque input element (2) rotating about an axis (X), able to be coupled in rotation to a crankshaft of a heat engine,

a first torque output element (3) able to be coupled in rotation to a first input shaft of a gearbox,

an inlet web (5) arranged between the torque input element (2) and the torque output element (3), in the torque transmission sense,

an inlet clutch (10) fed by at least one fluid line (37), selectively coupling and frictionally coupling the torque input element (2) and the inlet web (5),

a first output clutch (20) selectively and frictionally coupling the input web (5) and the first torque output element (3),

an actuating member (40) associated with the input clutch (10), and

a bearing member supporting the input element (47),

characterized in that the fluid line (37) is located radially between the actuating member (40) and the support bearing member of the input member (47).

2. Device (1) torque transmission according to claiml, characterized in that it further comprises a protective housing (46) consisting of a radial wall (46a) and an axial portion (46b).

3. Device (1) torque transmission according to the preceding claim characterized in that said pipe (37) fluid extends axially in the axial portion (46b) of the protective housing (46). 4. Device (1) for transmitting torque according to any one of the preceding claims characterized in that said pipe (37) of fluid has an outlet orifice (39) oriented axially.

5. Device (1) for transmitting torque according to the preceding claim, characterized in that said orifice (39) opens axially beyond the support bearing member of the input member (47). 6. Device (1) for transmitting torque according to any one of the two preceding claims, characterized in that the outlet orifice (38) is located at the right of a multidisk assembly (13) of the clutch of entrance (10).

7. Device (1) for transmitting torque according to any one of the preceding claims, characterized in that it further comprises a transmission member

(41) associated with the input clutch (10) which directs the fluid from the outlet (39) of the pipe (37) to the inlet clutch (10).

8. Device (1) for transmitting torque according to any one of the preceding claims characterized in that it further comprises a second output member (4), adapted to be coupled in rotation to a second input shaft a gearbox, a second output clutch (30), selectively and frictionally coupling the input web (5) and the second torque output member (4).

9. Device (1) for transmitting torque according to claim 8, characterized in that the first output clutch (20), the second output clutch (30) and the input clutch (10), succeed one another radially. approaching the axis (X). 10. Device (1) for transmitting torque according to any one of the preceding claims, characterized in that it further comprises an intermediate element (85) arranged between the torque input element (2) and the first torque output element (3), in the torque transmission sense, the intermediate element (85) comprising an electrical connection zone (65) adapted to be rotatably connected to a rotating electrical machine about a parallel axis to the axis of rotation (X).

11. Hybrid transmission module for a motor vehicle, characterized in that it comprises a torque transmission device (1) according to the preceding claim and a rotating electrical machine, said intermediate element (85) comprising the electrical connection zone (65). ) being connected to the rotating electrical machine so that the axis of rotation of the rotating electrical machine is offset from the axis of rotation (X) of the torque transmission device (1).