WO2015075365A2 - Transmission assembly for a hybrid vehicle provided with a damper - Google Patents

Transmission assembly for a hybrid vehicle provided with a damper Download PDF

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Publication number
WO2015075365A2
WO2015075365A2 PCT/FR2014/052939 FR2014052939W WO2015075365A2 WO 2015075365 A2 WO2015075365 A2 WO 2015075365A2 FR 2014052939 W FR2014052939 W FR 2014052939W WO 2015075365 A2 WO2015075365 A2 WO 2015075365A2
Authority
WO
WIPO (PCT)
Prior art keywords
support member
rotor
intermediate shaft
rotation
clutch
Prior art date
Application number
PCT/FR2014/052939
Other languages
French (fr)
Other versions
WO2015075365A3 (en
Inventor
Daniel Fenioux
Fabien LEBEAU
Gilles Lebas
Original Assignee
Valeo Embrayages
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Embrayages filed Critical Valeo Embrayages
Publication of WO2015075365A2 publication Critical patent/WO2015075365A2/en
Publication of WO2015075365A3 publication Critical patent/WO2015075365A3/en

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Classifications

    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B60K6/405—Housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/48—Vibration dampers, e.g. dual mass flywheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the invention relates to the field of transmissions for a motor vehicle. It relates in particular to a transmission assembly intended to be disposed between an internal combustion engine and a gearbox of a motor vehicle.
  • It relates in particular to a transmission assembly for a hybrid type of motor vehicle in which an electric machine is arranged in the transmission chain between the engine and the gearbox.
  • transmission assemblies arranged between the gearbox and the transmission chain, comprising an electric machine and a clutch motor side for coupling in rotation the crankshaft of the engine to the rotor of the electric machine.
  • the electric machine can also constitute an electric brake or bring a surplus of energy to the heat engine to assist or prevent it from stalling.
  • the electric machine can also drive the vehicle. When the engine is running, the electric machine acts as an alternator.
  • Such a transmission assembly is disclosed in particular in document US2011 / 0162480.
  • the transmission assembly described in document US2011 / 0162480 further comprises a pendulum damper, also called pendulum oscillator or pendulum.
  • a pendulum damper absorbs vibrations generated by the acyclisms of the engine.
  • the pendulum damper disclosed in this document has a large axial space which greatly increases the overall size of the transmission assembly.
  • a hybrid transmission assembly is subject to high dimensional constraints to allow its implementation between the engine and the vehicle gearbox. This transmission assembly for hybrid vehicle is not completely satisfactory. Object of the invention
  • An idea underlying the invention is to provide a transmission assembly for a hybrid vehicle that allows to effectively absorb vibration while having a small axial size.
  • the invention provides a transmission assembly for a motor vehicle, intended to be disposed between a heat engine equipped with a crankshaft and a gearbox equipped with an input shaft, said assembly comprising:
  • an electric machine comprising an external stator and an inner rotor, rotatable about an axis X, intended to be rotatably coupled to the input shaft of the gearbox;
  • a clutch arranged relative to the electric machine on the engine side, arranged to couple or uncouple in rotation the crankshaft of the engine and the rotor;
  • a pendulum damper comprising an annular support member, fixed in rotation with the rotor, and counterweight mounted movable on the support member;
  • stator comprises coils circumferentially distributed around the X axis and an annular interconnector, for interconnecting the coils, said interconnector being axially offset with respect to the coils on the side of the gearbox;
  • the pendular damper is, at least partially, housed radially inside the interconnector.
  • the vibrations are filtered in a particularly effective manner.
  • the pendulum damper being at least partially housed radially inside the stator interconnector, the presence of the pendular damper has no or little impact on the overall axial size of the assembly. .
  • the pendulum damper is integrally housed inside the stator interconnector of the electric machine. According to other advantageous embodiments, such an assembly may have one or more of the following characteristics:
  • the clutch comprises a friction disk which is integral in rotation with the rotor of the electric machine via an intermediate shaft, the rotor having a central opening through which the intermediate shaft passes.
  • the intermediate shaft comprises a flange and the rotor is mounted integral in rotation with the intermediate shaft via a support hub, said hub comprising an axial skirt for supporting the rotor and a radially extending inner flange; towards the inside of the axial skirt fixed to the flange of the intermediate shaft by fasteners.
  • the intermediate shaft comprises a flange and the support member of the pendular damper is fixed to the flange of the intermediate shaft by fasteners.
  • the intermediate shaft has a corrugated bore for receiving an end of the input shaft of the gearbox.
  • the pendulum weights have two flanks extending axially on either side of the support member and are connected to one another by means of two connecting struts axially traversing an associated opening of the support member.
  • the interconnector comprises at least four annular-shaped frames stacked axially on each other and insulated from each other, each frame carrying on its inner periphery tabs projecting inwardly from the frame connected to ends of the coils.
  • the assembly further comprises a double damping flywheel comprising:
  • a primary flywheel intended to be fixed to the crankshaft of the heat engine, and a secondary flywheel configured to form a reaction plate of the clutch, said primary and secondary flywheels being movable in rotation relative to each other around the axis of rotation X;
  • the assembly comprises a support element provided with fastening elements to the engine block and / or to the gearbox and comprising an outer peripheral wall whose inner surface cooperates with the external periphery of the stator, an inner sail extending between the clutch and the electric machine, the support member further defining a housing extending within a bore of the rotor and for accommodating at least partially an actuating stopper of the clutch.
  • Figure 1 is a half-sectional view of a transmission assembly intended to be disposed between a heat engine and a gearbox;
  • Figure 2 is a detailed perspective view of a pendulum feeder, a sidewall is shown partially broken away.
  • the terms “external” and “internal” as well as the “axial” and “radial” orientations will be used to denote, according to the definitions given in the description, elements of the transmission assembly.
  • the "radial” orientation is directed orthogonally to the X axis of rotation of the transmission assembly determining the "axial” orientation and, from the inside to the outside away from said axis X, the "circumferential” orientation is directed orthogonally to the X axis of rotation of the transmission assembly and orthogonal to the radial direction.
  • the terms “external” and “internal” are used to define the relative position of one element with respect to another, with reference to the X axis, an element close to the axis is thus described as internal as opposed to an outer member located radially peripherally.
  • the terms “rear” AR and “front” AV are used to define the relative position of one element relative to another in the axial direction, an element intended to be placed close to the engine being designated by the rear and an element intended to be placed close to the gearbox being designated by before.
  • a transmission assembly intended to be disposed between a heat engine and a gearbox.
  • the transmission assembly comprises a double damping flywheel 1 intended to be fixed to the crankshaft of the heat engine, a clutch 2 and an electric machine 3 comprising a stator 4 and a rotor 5.
  • the clutch 2 makes it possible to couple or uncouple the rotation of the crankshaft of the heat engine, not shown, to the rotor 5 of the electric machine 3. Furthermore, the rotor 5 of the electric machine 3 is intended to be coupled in rotation to an input shaft of the gearbox. The assembly is therefore able to transmit a torque between the crankshaft of the engine and the input shaft of the gearbox.
  • the electric machine 3 is a reversible rotary electric machine of the alternator-starter type. In starter mode, the clutch 2 is engaged and the electric machine 3 allows the start of the engine. In alternator mode, the electric machine 3 can recharge a battery of the vehicle and / or power organs or equipment consuming energy when the engine is running. It is further configured to recover energy when braking the vehicle.
  • the electric machine 3 can in particular be configured to stop the engine, for example, at a red light or in the caps, and then restart it (stop and go function in English). In one embodiment, it is capable of providing a surplus of power to prevent the engine stalls (boost function in English). Moreover, the electric machine 3 is able to drive the vehicle at least for a short distance, the clutch 2 then being disengaged and the engine stopped.
  • the double damping flywheel 1 comprises a primary flywheel 6, intended to be fixed to the crankshaft of the heat engine, not shown, and a secondary flywheel 7 which is centered and guided on the primary flywheel 6 by means of a Rolling bearing 8.
  • the primary 6 and secondary 7 flywheels are movable about the axis of rotation X and are furthermore movable in rotation relative to each other about said axis X.
  • the primary flywheel 6 comprises a central hub 9, radially internal, bearing the rolling bearing 8, centering the secondary flywheel 7, an annular portion 10 extending radially and a cylindrical portion 11 extending axially, on the opposite side to the motor, from the outer periphery of the annular portion 10.
  • the primary flywheel 6 also comprises an annular cover 12 fixed on the cylindrical portion 11.
  • the annular cover 12 defines with the annular portion 10 and the cylindrical portion 11, an annular chamber.
  • the central hub 9 has a radial annular portion in which are formed orifices. These orifices are arranged vis-à-vis orifices formed in the radially inner portion of the annular portion of the primary flywheel 6. Fastening screws, not shown, engaged in the orifices allow the attachment of the primary flywheel 6 to the end of the crankshaft.
  • the double damping flywheel 1 further comprises a torsion damper with resilient members for transmitting the torque and damping rotation acyclisms between the primary 6 and secondary 7 flywheels in order to reduce vibrations from the engine.
  • the torsion damper has first and second damping stages arranged in series.
  • the first damping stage comprises curved elastic members 13 with a circumferential effect, such as helical springs, housed in the annular chamber and distributed circumferentially around the axis X.
  • the annular chamber is filled with a lubricating agent, preferably grease.
  • the curved elastic members 13 extend, on the one hand, between two bearing seats carried by the primary flywheel 6 and, on the other hand, between two support lugs formed on an intermediate web 14.
  • the second stage of damping comprises a plurality of groups of two elastic members, not shown, extending radially inside the curved elastic members 13, and providing a coupling between the intermediate web 14 and two guide rings 15, 16.
  • the washers guidance extend axially on either side of the intermediate web 14.
  • the straight elastic members of each group are connected in series via a phasing member, not shown, free to rotate relative to the intermediate web 14 and guide washers 15, 16.
  • the guide washers 15, 16 are integral in rotation with the secondary flywheel 7.
  • a dual damping flywheel is described in particular in the doc WO2010079273.
  • the secondary flywheel 7 is intended to form the reaction plate of the clutch 2.
  • Said clutch 2 comprises a cover 1, fixed on the outer periphery of the secondary flywheel 7, a pressure plate 18, an annular diaphragm 19 axially biasing the plate pressure 18 to the secondary flywheel 7, a friction disc 20 and a clutch abutment 21 adapted to rotate the diaphragm 19 to move the clutch 2 to its disengaged position.
  • the clutch disc 20 is equipped with friction linings 22 and a corrugated hub 23 cooperating with splines formed on an intermediate shaft 24.
  • the pressure plate 18 is rotatably connected to the cover 17 by tangential elastic tabs, no illustrated, axial action permitting axial movement of the pressure plate 18 relative to the reaction plate.
  • the pressure plate 18 is movable, relative to the reaction plate, between an engaged position, in which the friction linings 22 are clamped between an annular friction surface of the secondary flywheel 7, forming a reaction plate, and the plateau pressure 18, and a disengaged position.
  • the clutch 2 In the engaged position, the clutch 2 is engaged and the torque is transmitted from the crankshaft to the intermediate shaft 24 via the clutch 2.
  • the diaphragm 19 is in contact, on the one hand, at its inner periphery, with the abutment clutch 21 and, secondly, with a boss of the pressure plate18. The diaphragm 19 urges the pressure plate 18 towards the reaction plate.
  • the clutch abutment 21 axially displaces the inner periphery of the diaphragm 19 rearwardly so as to tilt the diaphragm 19.
  • the load exerted by the diaphragm 19 on the pressure plate 18 decreases so that the pressure plate 18 is biased forward by the action of the tangential tangential tongues.
  • the clutch can be of the normally open type. In this case, it is the movement of the clutch abutment 21 towards the rear which makes it possible to solicit, via the diaphragm 19, the pressure plate 18 in the direction of the reaction plate. In such a normally open clutch, the diaphragm 19 has a resilience to return his fingers to a position before rest.
  • the reversible rotary electric machine 3 comprises an external stator 4 and an internal rotor 5.
  • the stator 4 surrounds the rotor 5.
  • the rotor 5 has a central opening allowing the passage of the intermediate shaft 24.
  • the stator 4 is carried by a support member 25 which is, on the one hand, intended to be fixed on the engine block and, secondly, intended to be fixed on the housing of the gearbox.
  • the support member 25 is inserted between the transmission case and the engine block and is arranged to allow attachment of the gearbox to the engine block.
  • the support member 25 forms, so to speak, a spacer between the engine block and the gearbox housing.
  • the support member 25 comprises a rear flange provided with orifices 64 allowing the passage of fasteners for fixing the support member 25 on the engine block.
  • the support member 25 has an outer peripheral wall whose inner surface is of cylindrical shape to cooperate with the outer periphery of the stator 4.
  • the mounting of the stator 4 in the support member 25 can be made by shrinking or mounting by force tightening.
  • the support element 25 also has an internal web 26, extending behind the stator 4 and the rotor 5 and forming a separation wall between the clutch 2, on the one hand, and the electric machine 3, on the other hand.
  • the support element 25 also defines a housing extending inside the rotor 5 and within which the clutch abutment 21 extends at least partially. Such an arrangement makes it possible to optimize the space requirement.
  • axial of the assembly The housing is defined by an axial skirt 27 and a bottom 28 of radial orientation. The bottom 28 is provided with a bore allowing passage of the intermediate shaft 24.
  • an axial flange 29 extends from the bottom 28 of the housing, towards the front, and forms with the front face of the bottom 28 of the housing, a cylindrical bore housing a bearing 30.
  • the bearing 30 cooperates, moreover, with the intermediate shaft 24, to the favor a shoulder 31 which defines a bearing surface before the bearing 30.
  • the bearing 30 thus allows the centering of the intermediate shaft 24 relative to the support member 25.
  • the bearing 30 comprises an outer ring, an inner ring and rolling bodies extending between said outer and inner rings. The outer ring is coupled axially to the support member 25 while the inner ring is coupled axially to the intermediate shaft 24.
  • the bearing 30 is axially fixed relative to the support member 25, on the one hand , and to the intermediate shaft 24, on the other hand.
  • a mounting of the bearing 30 makes it possible axially to maintain the intermediate shaft 24 with respect to the support element 25.
  • these can be force-fitted or glued.
  • the rear end of the intermediate shaft 24 is centered relative to the primary flywheel 6 by means of a controlled bearing mounted inside the central hub 9 of the primary flywheel 6.
  • the clutch abutment 21 is a fluid-controlled abutment. Stop
  • the stop 21 is concentric with the axis X and traversed by the intermediate shaft 24.
  • the stop 21 comprises two parts in piston cylinder relationship, that is to say a fixed portion 32, defining a blind annular cavity of axial orientation and a piston 33 mounted axially movable relative to the fixed portion 32.
  • the piston 33 enters the cavity to define therewith a variable volume working chamber.
  • the fixed part 32 of the abutment 21 comprises a guide tube 35 and an outer body 36 surrounding the guide tube 35.
  • the guide tube 35 for example metal, defines the annular cavity in which the piston 33 is movable and thus guides the piston 33.
  • the guide tube 35 is assembled to the body.
  • the guide tube 35 is traversed by the intermediate shaft 24.
  • the outer body 36 is equipped with fixing means, not shown, to the support element 25.
  • the clutch abutment 21 is a stop controlled by an electric actuator.
  • the stop 21 is here of the self-centering type. It comprises a ball bearing with a profiled rotating ring for a point contact with the inner ends of the fingers of the diaphragm 29 and a non-rotating ring coupled axially to the piston 33.
  • a sealing bellows 37 extends between the outer body 36 and the non-rotating ring.
  • the stop 21 is of pulled type, the stop 21 then acting by pulling on the fingers of the diaphragm 29.
  • the internal web 26 of the support member 25 comprises a recess for the passage of the fluid supply pipe 34 of the abutment 21.
  • the rotor 5 is supported by a hub 38.
  • the hub 38 has an axial skirt 39 for supporting the rotor 5.
  • the rotor 5 comprises a bundle of sheets which is shrink-fitted on the outer surface of the axial skirt 39. Thus, hot mounts the package of sheets by fitting on the outer surface of the axial skirt 39.
  • the hub 38 for supporting the rotor 5 is fixed to the intermediate shaft 24.
  • the front end of the intermediate shaft 24 comprises a flange 40 having a shoulder against which abuts an internal flange 41 formed in the support hub 38 and extending radially inward of the axial skirt 39.
  • Fixing means, such as screws 42, are used to secure the inner flange 41 of the hub 38 to the flange 40 of the intermediate shaft 24.
  • the intermediate shaft 24 is equipped at its front end with a bore 43 intended to receive a rear end 44 of an input shaft of the gearbox, partially shown in FIG.
  • the bore 43 is provided with splines intended to cooperate with complementary shaped splines carried by the rear end 44 of the input shaft of the gearbox.
  • the torque is transmitted between the intermediate shaft 24 and the input shaft of the gearbox.
  • a clutch or a torque converter may be disposed in the transmission chain between the intermediate shaft 24 and the input shaft of the gearbox.
  • the electric machine 3 is a polyphase electric machine.
  • the stator 4 of the electric machine 3 comprises a winding equipped with a plurality of coils 45 distributed circumferentially around the axis X.
  • the coils 45 are interconnected with each other by means of an interconnector 46.
  • the interconnector 46 is offset axially with respect to the coils 45, towards the gearbox.
  • the interconnector 46 has four ring-shaped frames 47, 48, 49, 50 extending in a radial plane.
  • the frames 47, 48, 49, 50 are electrically conductive, for example made of copper or advantageously of another weldable metallic material. These frames 47, 48, 49, 50 are stacked axially on each other and electrically isolated from each other.
  • the frames are embedded in a body made of electrically insulating material, such as plastics material.
  • Each frame 47, 48, 49, 50 carries on its inner periphery lugs 51 extending radially inwards towards the frame, which are welded to the ends 52 of the stator coils 45.
  • Each coil 45 has a first end called “Input” intended to be connected with one of the phase frames 47, 48, 49 and a second end called “output” intended to be connected to the neutral frame 50.
  • the “inputs" of the coils are alternately connected to the frames of phases 47, 48, 49.
  • Each phase frame 47, 48, 49 comprises on its outer periphery a connection terminal, not shown, for interconnection with a power connector which is itself connected to an inverter described for example in FIG. EP 0 831 580.
  • the rotor 5 is a rotor with permanent magnets. It comprises a body 53 formed of a stack of laminations stacked in the axial direction and permanent magnets 54 implanted radially in the laminations of the sheet bundle at the outer periphery of the rotor 5.
  • the transmission assembly is equipped with a pendulum damper 55.
  • the pendulum damper 55 comprises a support member 56 and a plurality of pendulum weights 57 circumferentially distributed on the support member 56.
  • the weights 57 are suitable oscillating relative to the support member 56 in a plane orthogonal to the axis of rotation X, in response to the irregularities of rotation.
  • each weight 57 comprises two flanks 58, 59 which extend axially on either side of the support member 56 and are connected axially to each other by the intermediate of two connecting struts 60.
  • Each connecting strut 60 passes axially through an associated opening 61 of the support member 56.
  • the oscillations of the weights 57 are guided by guiding means comprising, for each weight, two rolling elements 62 which each cooperate with a first runway carried by the support member 56 and with a second raceway, carried by the flyweight 57, and extending vis-à-vis the first raceway.
  • the first race tracks are formed by the outer edge of the passage openings 61 of the spacers 60.
  • the second raceways are carried by the spacers 60 connecting the flanks of each flyweight 57.
  • the rolling elements 62 are, for example, formed by a cylindrical roller of circular section.
  • the first and second race tracks have a generally epicyclic shape and are arranged such that the oscillation frequency of the flyweights 57 is proportional to the rotational speed of the drive shaft.
  • the weights 57 further comprise stop elements 63 made of elastomer material for damping shocks when the weights 57 arrive at the end of the stroke or when the engine is stopped.
  • the abutment elements 63 are here arranged between the two sides 58, 59 of each counterweight 57 and abut against the edge of the openings 61 for the passage of the spacers 60.
  • the support member 56 of the pendular damper 55 is a disc having, near its radially inner edge, orifices allowing the passage of fasteners 42 to the intermediate shaft 24.
  • the support member 56 of the pendular damper 55 and the hub 38 for supporting the rotor 5 are fixed to the flange 40 of the intermediate shaft 24 by common fastening means.
  • the pendular damper 55 extends, relative to the rotor 5, on the transmission side and is at least partially housed inside the interconnector 46. In other words, at least a portion of the pendulum damper 55 extends in the plane of the interconnector 46, radially inside thereof. In one embodiment, the pendulum damper 55 is integrally housed inside the interconnector 46.
  • the support member 56 and / or the pendulum weights 57 are made of a non-magnetic material, such as a polymer or polymer. 'aluminum.

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Abstract

The invention concerns a transmission assembly for a motor vehicle, intended to be disposed between a heat engine provided with a crankshaft and a gearbox provided with an input shaft, said assembly comprising: an electric machine (3) comprising an external stator (4) and an internal rotor (5) intended to be coupled in rotation with the gearbox input shaft; and - a pendulum damper (55); in which: the stator (4) comprises circumferentially distributed windings (45) and an interconnector (46) that is annular in shape, for interconnecting the windings (45), said interconnector (46) being axially offset relative to the windings (45) on the gearbox side; and in which - the pendulum damper (55) is at least partially radially housed inside the interconnector (46).

Description

ENSEMBLE DE TRANSMISSION POUR VEHICULE HYBRIDE EQUIPE D'UN AMORTISSEUR  TRANSMISSION ASSEMBLY FOR A HYBRID VEHICLE EQUIPPED WITH A SHOCK ABSORBER
Domaine technique de l'invention Technical field of the invention
L'invention se rapporte au domaine des transmissions pour véhicule automobile. Elle se rapporte notamment à un ensemble de transmission destiné à être disposé entre un moteur thermique interne et une boîte de vitesses d'un véhicule automobile.  The invention relates to the field of transmissions for a motor vehicle. It relates in particular to a transmission assembly intended to be disposed between an internal combustion engine and a gearbox of a motor vehicle.
Elle concerne notamment un ensemble de transmission pour un véhicule automobile de type hybride dans lequel une machine électrique est disposée, dans la chaîne de transmission, entre le moteur et la boîte de vitesses.  It relates in particular to a transmission assembly for a hybrid type of motor vehicle in which an electric machine is arranged in the transmission chain between the engine and the gearbox.
Etat de la technique  State of the art
Dans l'état de la technique, il est connu des ensembles de transmission, disposés entre la boîte de vitesses et la chaîne de transmission, comportant une machine électrique et un embrayage côté moteur permettant d'accoupler en rotation le vilebrequin du moteur thermique au rotor de la machine électrique. Ainsi, il est possible de couper le moteur thermique interne à chaque arrêt et de le redémarrer grâce à la machine électrique. La machine électrique peut également constituer un frein électrique ou apporter un surplus d'énergie au moteur thermique pour l'assister ou éviter que celui-ci ne cale. La machine électrique peut également assurer l'entraînement du véhicule. Lorsque le moteur tourne, la machine électrique joue le rôle d'un alternateur. Un tel ensemble de transmission est notamment divulgué dans le document US2011/0162480.  In the state of the art, it is known transmission assemblies, arranged between the gearbox and the transmission chain, comprising an electric machine and a clutch motor side for coupling in rotation the crankshaft of the engine to the rotor of the electric machine. Thus, it is possible to shut down the internal combustion engine at each stop and restart it with the electric machine. The electric machine can also constitute an electric brake or bring a surplus of energy to the heat engine to assist or prevent it from stalling. The electric machine can also drive the vehicle. When the engine is running, the electric machine acts as an alternator. Such a transmission assembly is disclosed in particular in document US2011 / 0162480.
L'ensemble de transmission décrit dans le document US2011/0162480 comporte en outre un amortisseur pendulaire, également appelé oscillateur pendulaire ou pendule. Un tel amortisseur pendulaire permet d'absorber les vibrations générées par les acyclismes du moteur thermique. L'amortisseur pendulaire divulgué dans ce document présente un encombrement axial important qui augmente considérablement l'encombrement global de l'ensemble de transmission. Or, un ensemble de transmission hybride est soumis à de fortes contraintes d'encombrement afin de permettre son implantation entre le moteur et la boîte de vitesses du véhicule. Cet ensemble de transmission pour véhicule hybride n'est donc pas totalement satisfaisant. Objet de l'invention The transmission assembly described in document US2011 / 0162480 further comprises a pendulum damper, also called pendulum oscillator or pendulum. Such a pendulum damper absorbs vibrations generated by the acyclisms of the engine. The pendulum damper disclosed in this document has a large axial space which greatly increases the overall size of the transmission assembly. However, a hybrid transmission assembly is subject to high dimensional constraints to allow its implementation between the engine and the vehicle gearbox. This transmission assembly for hybrid vehicle is not completely satisfactory. Object of the invention
Une idée à la base de l'invention est de proposer un ensemble de transmission pour véhicule hybride qui permette d'absorber efficacement les vibrations tout en présentant un faible encombrement axial.  An idea underlying the invention is to provide a transmission assembly for a hybrid vehicle that allows to effectively absorb vibration while having a small axial size.
Selon un mode de réalisation, l'invention fournit un ensemble de transmission pour véhicule automobile, destiné à être disposé entre un moteur thermique équipé d'un vilebrequin et une boîte de vitesses équipée d'un arbre d'entrée, ledit ensemble comprenant :  According to one embodiment, the invention provides a transmission assembly for a motor vehicle, intended to be disposed between a heat engine equipped with a crankshaft and a gearbox equipped with an input shaft, said assembly comprising:
- une machine électrique comportant un stator externe et un rotor interne, mobile en rotation autour d'un axe X, destiné à être accouplé en rotation à l'arbre d'entrée de la boîte de vitesses ;  an electric machine comprising an external stator and an inner rotor, rotatable about an axis X, intended to be rotatably coupled to the input shaft of the gearbox;
- un embrayage, disposé par rapport à la machine électrique du côté du moteur thermique, agencé pour accoupler ou désaccoupler en rotation le vilebrequin du moteur thermique et le rotor ; et  - A clutch, arranged relative to the electric machine on the engine side, arranged to couple or uncouple in rotation the crankshaft of the engine and the rotor; and
- un amortisseur pendulaire comportant un organe de support annulaire, solidaire en rotation du rotor, et des masselottes pendulaires montées mobiles sur l'organe de support ;  - A pendulum damper comprising an annular support member, fixed in rotation with the rotor, and counterweight mounted movable on the support member;
- dans lequel le stator comporte des bobines circonférentiellement réparties autour de l'axe X et un interconnecteur de forme annulaire, pour interconnecter les bobines, ledit interconnecteur étant décalé axialement par rapport aux bobines du côté de la boîte de vitesses ; et  in which the stator comprises coils circumferentially distributed around the X axis and an annular interconnector, for interconnecting the coils, said interconnector being axially offset with respect to the coils on the side of the gearbox; and
- dans lequel l'amortisseur pendulaire est, au moins partiellement, logé radialement à l'intérieur de l'interconnecteur.  - In which the pendular damper is, at least partially, housed radially inside the interconnector.
Ainsi, grâce à la présence de l'amortisseur pendulaire, les vibrations sont filtrées de manière particulièrement efficace. En outre, l'amortisseur pendulaire étant au moins partiellement logé radialement à l'intérieur de l'interconnecteur du stator, la présence de l'amortisseur pendulaire n'a pas ou que peu d'impact sur l'encombrement axial de l'ensemble.  Thus, thanks to the presence of the pendulum damper, the vibrations are filtered in a particularly effective manner. In addition, the pendulum damper being at least partially housed radially inside the stator interconnector, the presence of the pendular damper has no or little impact on the overall axial size of the assembly. .
Dans un mode de réalisation, l'amortisseur pendulaire est intégralement logé à l'intérieur de l'interconnecteur du stator de la machine électrique. Selon d'autres modes de réalisation avantageux, un tel ensemble peut présenter une ou plusieurs des caractéristiques suivantes : In one embodiment, the pendulum damper is integrally housed inside the stator interconnector of the electric machine. According to other advantageous embodiments, such an assembly may have one or more of the following characteristics:
- l'embrayage comporte un disque de friction qui est solidaire en rotation du rotor de la machine électrique par l'intermédiaire d'un arbre intermédiaire, le rotor présentant une ouverture centrale au travers de laquelle passe l'arbre intermédiaire.  - The clutch comprises a friction disk which is integral in rotation with the rotor of the electric machine via an intermediate shaft, the rotor having a central opening through which the intermediate shaft passes.
- l'arbre intermédiaire comporte une collerette et le rotor est monté solidaire en rotation de l'arbre intermédiaire par l'intermédiaire d'un moyeu de support, ledit moyeu comportant une jupe axiale de support du rotor et une bride interne s'étendant radialement vers l'intérieur de la jupe axiale fixée à la collerette de l'arbre intermédiaire par des organes de fixation.  the intermediate shaft comprises a flange and the rotor is mounted integral in rotation with the intermediate shaft via a support hub, said hub comprising an axial skirt for supporting the rotor and a radially extending inner flange; towards the inside of the axial skirt fixed to the flange of the intermediate shaft by fasteners.
- l'arbre intermédiaire comporte une collerette et l'organe de support de l'amortisseur pendulaire est fixé à la collerette de l'arbre intermédiaire par des organes de fixation.  - The intermediate shaft comprises a flange and the support member of the pendular damper is fixed to the flange of the intermediate shaft by fasteners.
- la bride interne du moyeu de support du rotor et l'organe de support de l'amortisseur pendulaire sont fixés à la collerette de l'arbre intermédiaire par des organes de fixation communs.  - The inner flange of the rotor support hub and the support member of the pendulum damper are fixed to the flange of the intermediate shaft by common fasteners.
- l'arbre intermédiaire comporte un alésage cannelé destiné à recevoir une extrémité de l'arbre d'entrée de la boîte de vitesses.  - The intermediate shaft has a corrugated bore for receiving an end of the input shaft of the gearbox.
- les masselottes pendulaires comportent deux flancs s'étendant axialement de part et d'autre de l'organe de support et sont reliés l'un à l'autre par l'intermédiaire de deux entretoises de liaison traversant axialement une ouverture associée de l'organe de support.  - The pendulum weights have two flanks extending axially on either side of the support member and are connected to one another by means of two connecting struts axially traversing an associated opening of the support member.
- l'interconnecteur comporte au moins quatre cadres de forme annulaire, empilés axialement les uns sur les autres et isolés entre eux, chaque cadre portant sur sa périphérie interne des pattes s'étendant en saillie vers l'intérieur du cadre connectées à des extrémités des bobines.  the interconnector comprises at least four annular-shaped frames stacked axially on each other and insulated from each other, each frame carrying on its inner periphery tabs projecting inwardly from the frame connected to ends of the coils.
- l'ensemble comporte en outre un double volant amortisseur comprenant :  the assembly further comprises a double damping flywheel comprising:
- un volant primaire, destiné à être fixé au vilebrequin du moteur thermique, et un volant secondaire configuré pour former un plateau de réaction de l'embrayage, lesdits volants primaire et secondaire étant mobiles en rotation l'un par rapport à l'autre autour de l'axe de rotation X ; et  a primary flywheel, intended to be fixed to the crankshaft of the heat engine, and a secondary flywheel configured to form a reaction plate of the clutch, said primary and secondary flywheels being movable in rotation relative to each other around the axis of rotation X; and
- un amortisseur de torsion à organes élastiques pour transmettre un couple et amortir les acyclismes de rotation entre les volants primaire et secondaire. - l'ensemble comporte un élément de support pourvu d'éléments de fixation au bloc moteur et/ou à la boîte de vitesses et comportant une paroi périphérique externe dont la surface interne coopère avec la périphérie externe du stator, un voile interne s'étendant entre l'embrayage et la machine électrique, l'élément de support définissant en outre un logement s'étendant à l'intérieur d'un alésage du rotor et permettant de loger au moins partiellement une butée d'actionnement de l'embrayage. - A torsion damper with elastic members for transmitting torque and damping rotational acyclisms between the primary and secondary flywheels. the assembly comprises a support element provided with fastening elements to the engine block and / or to the gearbox and comprising an outer peripheral wall whose inner surface cooperates with the external periphery of the stator, an inner sail extending between the clutch and the electric machine, the support member further defining a housing extending within a bore of the rotor and for accommodating at least partially an actuating stopper of the clutch.
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux figures annexées.  The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the appended figures.
Sur ces figures :  In these figures:
La figure 1 est une demi-vue en coupe d'un ensemble de transmission destiné à être disposé entre un moteur thermique et une boîte de vitesses ; - La figure 2 est une vue détaillée en perspective d'une masselotte pendulaire dont un flanc est représenté partiellement arraché.  Figure 1 is a half-sectional view of a transmission assembly intended to be disposed between a heat engine and a gearbox; - Figure 2 is a detailed perspective view of a pendulum feeder, a sidewall is shown partially broken away.
Description détaillée de modes de réalisation  Detailed description of embodiments
Dans la description et les revendications, on utilisera, les termes "externe" et "interne" ainsi que les orientations "axiale" et "radiale" pour désigner, selon les définitions données dans la description, des éléments de l'ensemble de transmission. Par convention, l'orientation "radiale" est dirigée orthogonalement à l'axe X de rotation de l'ensemble de transmission déterminant l'orientation "axiale" et, de l'intérieur vers l'extérieur en s'éloignant dudit axe X, l'orientation "circonférentielle" est dirigée orthogonalement à l'axe X de rotation de l'ensemble de transmission et orthogonalement à la direction radiale. Les termes "externe" et "interne" sont utilisés pour définir la position relative d'un élément par rapport à un autre, par référence à l'axe X, un élément proche de l'axe est ainsi qualifié d'interne par opposition à un élément externe situé radialement en périphérie. Par ailleurs, les termes "arrière" AR et "avant" AV sont utilisés pour définir la position relative d'un élément par rapport à un autre selon la direction axiale, un élément destiné à être placé proche du moteur thermique étant désigné par arrière et un élément destiné à être placé proche de la boîte de vitesse étant désigné par avant. En se reportant à la figure 1 , on voit un ensemble de transmission, destiné à être disposé entre un moteur thermique et une boîte de vitesses. L'ensemble de transmission comporte un double volant amortisseur 1 , destiné à être fixé au vilebrequin du moteur thermique, un embrayage 2 et une machine électrique 3 comprenant un stator 4 et un rotor 5. In the description and the claims, the terms "external" and "internal" as well as the "axial" and "radial" orientations will be used to denote, according to the definitions given in the description, elements of the transmission assembly. By convention, the "radial" orientation is directed orthogonally to the X axis of rotation of the transmission assembly determining the "axial" orientation and, from the inside to the outside away from said axis X, the "circumferential" orientation is directed orthogonally to the X axis of rotation of the transmission assembly and orthogonal to the radial direction. The terms "external" and "internal" are used to define the relative position of one element with respect to another, with reference to the X axis, an element close to the axis is thus described as internal as opposed to an outer member located radially peripherally. Furthermore, the terms "rear" AR and "front" AV are used to define the relative position of one element relative to another in the axial direction, an element intended to be placed close to the engine being designated by the rear and an element intended to be placed close to the gearbox being designated by before. Referring to Figure 1, we see a transmission assembly, intended to be disposed between a heat engine and a gearbox. The transmission assembly comprises a double damping flywheel 1 intended to be fixed to the crankshaft of the heat engine, a clutch 2 and an electric machine 3 comprising a stator 4 and a rotor 5.
L'embrayage 2 permet d'accoupler ou de désaccoupler en rotation le vilebrequin du moteur thermique, non représenté, au rotor 5 de la machine électrique 3. Par ailleurs, le rotor 5 de la machine électrique 3 est destiné à être couplé en rotation à un arbre d'entrée de la boîte de vitesses. L'ensemble est donc apte à transmettre un couple entre le vilebrequin du moteur thermique et l'arbre d'entrée de la boîte de vitesses.  The clutch 2 makes it possible to couple or uncouple the rotation of the crankshaft of the heat engine, not shown, to the rotor 5 of the electric machine 3. Furthermore, the rotor 5 of the electric machine 3 is intended to be coupled in rotation to an input shaft of the gearbox. The assembly is therefore able to transmit a torque between the crankshaft of the engine and the input shaft of the gearbox.
La machine électrique 3 est une machine électrique tournante réversible du type alterno-démarreur. En mode démarreur, l'embrayage 2 est embrayé et la machine électrique 3 permet le démarrage du moteur thermique. En mode alternateur, la machine électrique 3 permet de recharger une batterie du véhicule et/ou d'alimenter les organes ou équipements consommateurs d'énergie lorsque le moteur thermique tourne. Elle est en outre configurée pour récupérer de l'énergie lors du freinage du véhicule. La machine électrique 3 peut notamment être configurée pour arrêter le moteur thermique, par exemple, au feu rouge ou dans les bouchons, et le redémarrer ensuite (fonction Stop and Go en Anglais). Dans un mode de réalisation, elle est apte à fournir un surplus de puissance permettant d'éviter que le moteur cale (fonction boost en Anglais). Par ailleurs, la machine électrique 3 est apte à entraîner le véhicule au moins sur une courte distance, l'embrayage 2 étant alors désengagé et le moteur thermique arrêté.  The electric machine 3 is a reversible rotary electric machine of the alternator-starter type. In starter mode, the clutch 2 is engaged and the electric machine 3 allows the start of the engine. In alternator mode, the electric machine 3 can recharge a battery of the vehicle and / or power organs or equipment consuming energy when the engine is running. It is further configured to recover energy when braking the vehicle. The electric machine 3 can in particular be configured to stop the engine, for example, at a red light or in the caps, and then restart it (stop and go function in English). In one embodiment, it is capable of providing a surplus of power to prevent the engine stalls (boost function in English). Moreover, the electric machine 3 is able to drive the vehicle at least for a short distance, the clutch 2 then being disengaged and the engine stopped.
Le double volant amortisseur 1 comprend un volant d'inertie primaire 6, destiné à être fixé au vilebrequin du moteur thermique, non représenté, et un volant d'inertie secondaire 7 qui est centré et guidé sur le volant primaire 6 au moyen d'un palier à roulement 8. Les volants d'inertie primaire 6 et secondaire 7 sont mobiles autour de l'axe de rotation X et sont, en outre, mobiles en rotation l'un par rapport à l'autre, autour dudit axe X.  The double damping flywheel 1 comprises a primary flywheel 6, intended to be fixed to the crankshaft of the heat engine, not shown, and a secondary flywheel 7 which is centered and guided on the primary flywheel 6 by means of a Rolling bearing 8. The primary 6 and secondary 7 flywheels are movable about the axis of rotation X and are furthermore movable in rotation relative to each other about said axis X.
Le volant primaire 6 comporte un moyeu central 9, radialement interne, portant le palier à roulement 8, de centrage du volant secondaire 7, une portion annulaire 10 s'étendant radialement et une portion cylindrique 11 s'étendant axialement, du côté opposé au moteur, depuis la périphérie externe de la portion annulaire 10. Le volant primaire 6 comporte également un couvercle annulaire 12 fixé sur la portion cylindrique 11 . Le couvercle annulaire 12 définit avec la portion annulaire 10 et la portion cylindrique 11 , une chambre annulaire. The primary flywheel 6 comprises a central hub 9, radially internal, bearing the rolling bearing 8, centering the secondary flywheel 7, an annular portion 10 extending radially and a cylindrical portion 11 extending axially, on the opposite side to the motor, from the outer periphery of the annular portion 10. The primary flywheel 6 also comprises an annular cover 12 fixed on the cylindrical portion 11. The annular cover 12 defines with the annular portion 10 and the cylindrical portion 11, an annular chamber.
Le moyeu central 9 comporte une partie annulaire radiale dans laquelle sont ménagés des orifices. Ces orifices sont disposés en vis-à-vis d'orifices ménagés dans la portion radialement interne de la portion annulaire du volant primaire 6. Des vis de fixation, non représentés, engagées dans les orifices permettent la fixation du volant primaire 6 à l'extrémité du vilebrequin.  The central hub 9 has a radial annular portion in which are formed orifices. These orifices are arranged vis-à-vis orifices formed in the radially inner portion of the annular portion of the primary flywheel 6. Fastening screws, not shown, engaged in the orifices allow the attachment of the primary flywheel 6 to the end of the crankshaft.
Le double volant amortisseur 1 comporte, en outre, un amortisseur de torsion à organes élastiques permettant de transmettre le couple et amortir les acyclismes de rotation entre les volants d'inertie primaire 6 et secondaire 7 afin de réduire les vibrations provenant du moteur thermique.  The double damping flywheel 1 further comprises a torsion damper with resilient members for transmitting the torque and damping rotation acyclisms between the primary 6 and secondary 7 flywheels in order to reduce vibrations from the engine.
Dans le mode de réalisation représenté, l'amortisseur de torsion comporte un premier et un second étages d'amortissement agencés en série. Le premier étage d'amortissement comprend des organes élastiques courbes 13 à effet circonférentiel, tels que des ressorts hélicoïdaux, logés dans la chambre annulaire et réparties circonférentiellement autour de l'axe X. Afin de limiter le frottement entre les organes élastiques courbes 13 et la portion cylindrique 11 du volant primaire 6, la chambre annulaire est remplie d'un agent lubrifiant, de préférence de la graisse. Les organes élastiques courbes 13 s'étendent, d'une part, entre deux sièges d'appui portés par le volant primaire 6 et, d'autre part, entre deux pattes d'appui ménagés sur un voile intermédiaire 14. Le second étage d'amortissement comporte une pluralité de groupes de deux organes élastiques, non représentés, s'étendant radialement à l'intérieur des organes élastiques courbes 13, et assurant un couplage entre le voile intermédiaire 14 et deux rondelles de guidage 15, 16. Les rondelles de guidage s'étendent axialement de part et d'autre du voile intermédiaire 14. Les organes élastiques droits de chaque groupe sont montés en série par l'intermédiaire d'un organe de phasage, non représenté, libre en rotation par rapport au voile intermédiaire 14 et aux rondelles de guidage 15, 16. Les rondelles de guidage 15, 16 sont solidaires en rotation du volant d'inertie secondaire 7. Pour plus de précisions, un tel double volant amortisseur est notamment décrit dans le document WO2010079273. Le volant secondaire 7 est destiné à former le plateau de réaction de l'embrayage 2. Ledit embrayage 2 comporte un couvercle 1 , fixé sur la périphérie externe du volant secondaire 7, un plateau de pression 18, un diaphragme annulaire 19 sollicitant axialement le plateau de pression 18 vers le volant secondaire 7, un disque de friction 20 et une butée d'embrayage 21 apte à faire pivoter le diaphragme 19 afin de déplacer l'embrayage 2 vers sa position débrayée. Le disque d'embrayage 20 est équipé de garnitures de friction 22 et d'un moyeu cannelé 23 coopérant avec des cannelures formées sur un arbre intermédiaire 24. Le plateau de pression 18 est lié en rotation au couvercle 17 par des languettes élastiques tangentielles, non illustrées, à action axiale autorisant un mouvement axial du plateau de pression 18 par rapport au plateau de réaction. Ainsi, le plateau de pression 18 est mobile, par rapport au plateau de réaction, entre une position embrayée, dans laquelle les garnitures de friction 22 sont pincées entre une surface annulaire de frottement du volant secondaire 7, formant plateau de réaction, et le plateau de pression 18, et une position débrayée. In the embodiment shown, the torsion damper has first and second damping stages arranged in series. The first damping stage comprises curved elastic members 13 with a circumferential effect, such as helical springs, housed in the annular chamber and distributed circumferentially around the axis X. In order to limit the friction between the curved elastic members 13 and the cylindrical portion 11 of the primary flywheel 6, the annular chamber is filled with a lubricating agent, preferably grease. The curved elastic members 13 extend, on the one hand, between two bearing seats carried by the primary flywheel 6 and, on the other hand, between two support lugs formed on an intermediate web 14. The second stage of damping comprises a plurality of groups of two elastic members, not shown, extending radially inside the curved elastic members 13, and providing a coupling between the intermediate web 14 and two guide rings 15, 16. The washers guidance extend axially on either side of the intermediate web 14. The straight elastic members of each group are connected in series via a phasing member, not shown, free to rotate relative to the intermediate web 14 and guide washers 15, 16. The guide washers 15, 16 are integral in rotation with the secondary flywheel 7. For more details, such a dual damping flywheel is described in particular in the doc WO2010079273. The secondary flywheel 7 is intended to form the reaction plate of the clutch 2. Said clutch 2 comprises a cover 1, fixed on the outer periphery of the secondary flywheel 7, a pressure plate 18, an annular diaphragm 19 axially biasing the plate pressure 18 to the secondary flywheel 7, a friction disc 20 and a clutch abutment 21 adapted to rotate the diaphragm 19 to move the clutch 2 to its disengaged position. The clutch disc 20 is equipped with friction linings 22 and a corrugated hub 23 cooperating with splines formed on an intermediate shaft 24. The pressure plate 18 is rotatably connected to the cover 17 by tangential elastic tabs, no illustrated, axial action permitting axial movement of the pressure plate 18 relative to the reaction plate. Thus, the pressure plate 18 is movable, relative to the reaction plate, between an engaged position, in which the friction linings 22 are clamped between an annular friction surface of the secondary flywheel 7, forming a reaction plate, and the plateau pressure 18, and a disengaged position.
En position embrayée, l'embrayage 2 est engagé et le couple est transmis du vilebrequin à l'arbre intermédiaire 24 via l'embrayage 2. Le diaphragme 19 est en contact, d'une part, à sa périphérie interne, avec la butée d'embrayage 21 et, d'autre part, avec un bossage du plateau de pression18. Le diaphragme 19 sollicite le plateau de pression 18 en direction du plateau de réaction.  In the engaged position, the clutch 2 is engaged and the torque is transmitted from the crankshaft to the intermediate shaft 24 via the clutch 2. The diaphragm 19 is in contact, on the one hand, at its inner periphery, with the abutment clutch 21 and, secondly, with a boss of the pressure plate18. The diaphragm 19 urges the pressure plate 18 towards the reaction plate.
Pour désengager l'embrayage 2, la butée d'embrayage 21 déplace axialement la périphérie interne du diaphragme 19 vers l'arrière de sorte à faire basculer le diaphragme 19. Ainsi, la charge exercée par le diaphragme 19 sur le plateau de pression 18 diminue de telle sorte que le plateau de pression 18 est rappelé vers l'avant sous l'action des languettes tangentielles élastiques.  To disengage the clutch 2, the clutch abutment 21 axially displaces the inner periphery of the diaphragm 19 rearwardly so as to tilt the diaphragm 19. Thus, the load exerted by the diaphragm 19 on the pressure plate 18 decreases so that the pressure plate 18 is biased forward by the action of the tangential tangential tongues.
Dans une variante non représentée, l'embrayage peut être du type normalement ouvert. Dans ce cas, c'est le mouvement de la butée d'embrayage 21 vers l'arrière qui permet de solliciter, via le diaphragme 19, le plateau de pression 18 en direction du plateau de réaction. Dans un tel embrayage normalement ouvert, le diaphragme 19 présente une élasticité propre à ramener ses doigts dans une position avant de repos. La machine électrique 3 tournante réversible comporte un stator 4 externe et un rotor 5 interne. Le stator 4 entoure le rotor 5. Le rotor 5 présente une ouverture centrale permettant le passage de l'arbre intermédiaire 24. In a variant not shown, the clutch can be of the normally open type. In this case, it is the movement of the clutch abutment 21 towards the rear which makes it possible to solicit, via the diaphragm 19, the pressure plate 18 in the direction of the reaction plate. In such a normally open clutch, the diaphragm 19 has a resilience to return his fingers to a position before rest. The reversible rotary electric machine 3 comprises an external stator 4 and an internal rotor 5. The stator 4 surrounds the rotor 5. The rotor 5 has a central opening allowing the passage of the intermediate shaft 24.
Le stator 4 est porté par un élément de support 25 qui est, d'une part, destiné à être fixé sur le bloc moteur et, d'autre part, destiné à être fixé sur le carter de la boîte de vitesses. L'élément de support 25 est inséré entre le carter de la boîte de vitesses et le bloc-moteur et est agencé pour permettre la fixation de la boîte de vitesses au bloc-moteur. En d'autres termes, l'élément de support 25 forme, en quelque sorte, une entretoise entre le bloc-moteur et la carter de la boîte de vitesses. Dans le mode de réalisation représenté, l'élément de support 25 comporte une bride arrière pourvu d'orifices 64 permettant le passage d'organes de fixation pour fixer l'élément de support 25 sur le bloc-moteur.  The stator 4 is carried by a support member 25 which is, on the one hand, intended to be fixed on the engine block and, secondly, intended to be fixed on the housing of the gearbox. The support member 25 is inserted between the transmission case and the engine block and is arranged to allow attachment of the gearbox to the engine block. In other words, the support member 25 forms, so to speak, a spacer between the engine block and the gearbox housing. In the embodiment shown, the support member 25 comprises a rear flange provided with orifices 64 allowing the passage of fasteners for fixing the support member 25 on the engine block.
L'élément de support 25 comporte une paroi périphérique externe dont la surface interne est de forme cylindrique afin de coopérer avec la périphérie externe du stator 4. Le montage du stator 4 dans l'élément de support 25 peut être réalisé par frettage ou par montage par serrage à force. L'élément de support 25 présente également un voile interne 26, s'étendant à l'arrière du stator 4 et du rotor 5 et formant une paroi de séparation entre l'embrayage 2, d'une part, et la machine électrique 3, d'autre part. L'élément de support 25 définit également un logement s'étendant à l'intérieur du rotor 5 et à l'intérieur duquel s'étend, au moins partiellement la butée d'embrayage 21. Un tel agencement permet d'optimiser l'encombrement axial de l'ensemble. Le logement est défini par une jupe axiale 27 et un fond 28 d'orientation radiale. Le fond 28 est pourvu d'un alésage permettant le passage de l'arbre intermédiaire 24.  The support member 25 has an outer peripheral wall whose inner surface is of cylindrical shape to cooperate with the outer periphery of the stator 4. The mounting of the stator 4 in the support member 25 can be made by shrinking or mounting by force tightening. The support element 25 also has an internal web 26, extending behind the stator 4 and the rotor 5 and forming a separation wall between the clutch 2, on the one hand, and the electric machine 3, on the other hand. The support element 25 also defines a housing extending inside the rotor 5 and within which the clutch abutment 21 extends at least partially. Such an arrangement makes it possible to optimize the space requirement. axial of the assembly. The housing is defined by an axial skirt 27 and a bottom 28 of radial orientation. The bottom 28 is provided with a bore allowing passage of the intermediate shaft 24.
Par ailleurs, un rebord axial 29 s'étend du fond 28 du logement, vers l'avant, et forme avec la face avant du fond 28 du logement, un alésage cylindrique de logement d'un roulement 30. En d'autres termes, le fond 28 du logement limite, côté moteur, l'alésage cylindrique de logement du roulement 30 et définit une surface radiale d'appui arrière du roulement 30. Le roulement 30 coopère, par ailleurs, avec l'arbre intermédiaire 24, à la faveur d'un épaulement 31 qui définit une surface d'appui avant du roulement 30. Le roulement 30 permet ainsi le centrage de l'arbre intermédiaire 24 par rapport à l'élément de support 25. Le roulement 30 comporte une bague externe, une bague interne et des corps roulants s'étendant entre lesdites bagues externe et interne. La bague externe est attelée axialement à l'élément de support 25 tandis que la bague interne est attelée axialement à l'arbre intermédiaire 24. Ainsi, le roulement 30 est axialement fixe par rapport à l'élément de support 25, d'une part, et à l'arbre intermédiaire 24, d'autre part. En outre, un tel montage du roulement 30 permet de maintenir axialement l'arbre intermédiaire 24 par rapport à l'élément de support 25. Afin d'atteler axialement les bagues interne et externe, celles-ci peuvent être emmanchées à force ou collées. De manière alternative, il est également possible d'utiliser un ou plusieurs organes de blocage, tels que des joncs ou circlips élastiques. Furthermore, an axial flange 29 extends from the bottom 28 of the housing, towards the front, and forms with the front face of the bottom 28 of the housing, a cylindrical bore housing a bearing 30. In other words, the bottom 28 of the limiting housing, on the motor side, the cylindrical bearing housing bore 30 and defines a radial bearing rear bearing surface 30. The bearing 30 cooperates, moreover, with the intermediate shaft 24, to the favor a shoulder 31 which defines a bearing surface before the bearing 30. The bearing 30 thus allows the centering of the intermediate shaft 24 relative to the support member 25. The bearing 30 comprises an outer ring, an inner ring and rolling bodies extending between said outer and inner rings. The outer ring is coupled axially to the support member 25 while the inner ring is coupled axially to the intermediate shaft 24. Thus, the bearing 30 is axially fixed relative to the support member 25, on the one hand , and to the intermediate shaft 24, on the other hand. In addition, such a mounting of the bearing 30 makes it possible axially to maintain the intermediate shaft 24 with respect to the support element 25. In order to axially couple the inner and outer rings, these can be force-fitted or glued. Alternatively, it is also possible to use one or more locking members, such as elastic rods or circlips.
Dans un mode de réalisation, non représenté, l'extrémité arrière de l'arbre intermédiaire 24 est centrée par rapport au volant primaire 6 à la faveur d'un roulement piloté monté à l'intérieur du moyeu central 9 du volant primaire 6.  In one embodiment, not shown, the rear end of the intermediate shaft 24 is centered relative to the primary flywheel 6 by means of a controlled bearing mounted inside the central hub 9 of the primary flywheel 6.
La butée d'embrayage 21 est une butée à commande par fluide. La butée The clutch abutment 21 is a fluid-controlled abutment. Stop
21 est concentrique à l'axe X et traversée par l'arbre intermédiaire 24. La butée 21 comporte deux parties en relation de cylindre piston, c'est-à-dire une partie fixe 32, délimitant une cavité annulaire borgne d'orientation axiale, et un piston 33 monté mobile axialement par rapport à la partie fixe 32. Le piston 33 pénètre dans la cavité pour définir avec celle-ci une chambre de travail à volume variable. 21 is concentric with the axis X and traversed by the intermediate shaft 24. The stop 21 comprises two parts in piston cylinder relationship, that is to say a fixed portion 32, defining a blind annular cavity of axial orientation and a piston 33 mounted axially movable relative to the fixed portion 32. The piston 33 enters the cavity to define therewith a variable volume working chamber.
La cavité communique par un canal avec une arrivée de connexion à un tuyau 34 d'alimentation en fluide relié à un maître-cylindre. La chambre de travail est donc admise à être pressurisée ou dépressurisée. Dans le mode de réalisation représenté, la partie fixe 32 de la butée 21 comporte un tube guide 35 et un corps, extérieur 36, entourant le tube-guide 35. Le tube-guide 35, par exemple métallique, définit la cavité annulaire dans laquelle le piston 33 est mobile et guide ainsi le piston 33. Le tube guide 35 est assemblé au corps. Le tube-guide 35 est traversé par l'arbre intermédiaire 24. Le corps extérieur 36 est équipé de moyens de fixation, non représentés, à l'élément de support 25.  The cavity communicates via a channel with a connection arrival to a fluid supply pipe 34 connected to a master cylinder. The working chamber is therefore allowed to be pressurized or depressurized. In the embodiment shown, the fixed part 32 of the abutment 21 comprises a guide tube 35 and an outer body 36 surrounding the guide tube 35. The guide tube 35, for example metal, defines the annular cavity in which the piston 33 is movable and thus guides the piston 33. The guide tube 35 is assembled to the body. The guide tube 35 is traversed by the intermediate shaft 24. The outer body 36 is equipped with fixing means, not shown, to the support element 25.
Dans un mode de réalisation non représenté, la butée d'embrayage 21 est une butée commandée par un actionneur électrique.  In an embodiment not shown, the clutch abutment 21 is a stop controlled by an electric actuator.
La butée 21 est ici du type auto-centreuse. Elle comporte un roulement à billes avec une bague tournante profilée pour un contact ponctuel avec les extrémités internes des doigts du diaphragme 29 et une bague non tournante attelée axialement au piston 33. Un soufflet d'étanchéité 37 s'étend entre le corps extérieur 36 et la bague non-tournante. En variante, la butée 21 est de type tirée, la butée 21 agissant alors en tirant sur les doigts du diaphragme 29. The stop 21 is here of the self-centering type. It comprises a ball bearing with a profiled rotating ring for a point contact with the inner ends of the fingers of the diaphragm 29 and a non-rotating ring coupled axially to the piston 33. A sealing bellows 37 extends between the outer body 36 and the non-rotating ring. In a variant, the stop 21 is of pulled type, the stop 21 then acting by pulling on the fingers of the diaphragm 29.
Le voile interne 26 de l'élément de support 25 comprend un évidement pour le passage du tuyau 34 d'alimentation en fluide de la butée 21 .  The internal web 26 of the support member 25 comprises a recess for the passage of the fluid supply pipe 34 of the abutment 21.
Le rotor 5 est supporté par un moyeu 38. Le moyeu 38 comporte une jupe axiale 39 de support du rotor 5. Le rotor 5 comporte un paquet de tôles qui est monté par frettage sur la surface externe de la jupe axiale 39. Ainsi, on monte à chaud le paquet de tôles par emmanchement sur la surface externe de la jupe axiale 39.  The rotor 5 is supported by a hub 38. The hub 38 has an axial skirt 39 for supporting the rotor 5. The rotor 5 comprises a bundle of sheets which is shrink-fitted on the outer surface of the axial skirt 39. Thus, hot mounts the package of sheets by fitting on the outer surface of the axial skirt 39.
Le moyeu 38 de support du rotor 5 est fixé à l'arbre intermédiaire 24. Pour ce faire, l'extrémité avant de l'arbre intermédiaire 24 comporte une collerette 40 présentant un épaulement contre lequel vient en appui une bride interne 41 formée dans le moyeu de support 38 et s'étendant radialement vers l'intérieur de la jupe axiale 39. Des moyens de fixation, tels que des vis 42, permettent de fixer la bride interne 41 du moyeu 38 à la collerette 40 de l'arbre intermédiaire 24. Ainsi, le rotor 5 est centré par rapport à l'élément de support 25 et, par conséquent, par rapport au stator 4 par l'intermédiaire du roulement 30.  The hub 38 for supporting the rotor 5 is fixed to the intermediate shaft 24. To do this, the front end of the intermediate shaft 24 comprises a flange 40 having a shoulder against which abuts an internal flange 41 formed in the support hub 38 and extending radially inward of the axial skirt 39. Fixing means, such as screws 42, are used to secure the inner flange 41 of the hub 38 to the flange 40 of the intermediate shaft 24 Thus, the rotor 5 is centered with respect to the support member 25 and, therefore, with respect to the stator 4 via the bearing 30.
L'arbre intermédiaire 24 est équipé à son extrémité avant d'un alésage 43 destiné à recevoir une extrémité arrière 44 d'un arbre d'entrée de la boîte de vitesse, partiellement représenté sur la figure 1 . L'alésage 43 est pourvu de cannelures destinées à coopérer avec des cannelures de forme complémentaire portées par l'extrémité arrière 44 de l'arbre d'entrée de la boîte de vitesses. Ainsi, le couple est transmis entre l'arbre intermédiaire 24 et l'arbre d'entrée de la boîte de vitesses.  The intermediate shaft 24 is equipped at its front end with a bore 43 intended to receive a rear end 44 of an input shaft of the gearbox, partially shown in FIG. The bore 43 is provided with splines intended to cooperate with complementary shaped splines carried by the rear end 44 of the input shaft of the gearbox. Thus, the torque is transmitted between the intermediate shaft 24 and the input shaft of the gearbox.
De manière alternative, un embrayage ou un convertisseur de couple peut être disposé dans la chaîne de transmission entre l'arbre intermédiaire 24 et l'arbre d'entrée de la boîte de vitesses.  Alternatively, a clutch or a torque converter may be disposed in the transmission chain between the intermediate shaft 24 and the input shaft of the gearbox.
La machine électrique 3 est une machine électrique polyphasé. Le stator 4 de la machine électrique 3 comporte un bobinage équipé d'une pluralité de bobines 45 réparties circonférentiellement autour de l'axe X. Les bobines 45 sont interconnectées entre elles à l'aide d'un interconnecteur 46. L'interconnecteur 46 est décalé axialement par rapport aux bobines 45, en direction de la boîte de vitesses. Dans le mode de réalisation illustré, l'interconnecteur 46 comporte quatre cadres 47, 48, 49, 50 de forme annulaire s'étendant suivant un plan radial. Les cadres 47, 48, 49, 50 sont électriquement conducteurs en étant par exemple en cuivre ou avantageusement en un autre matériau métallique soudable. Ces cadres 47, 48, 49, 50 sont empilés axialement les uns sur les autres et isolés électriquement les uns des autres. De préférence, les cadres sont noyés dans un corps réalisé en matériau électriquement isolant, tel que de la matière plastique. Chaque cadre 47, 48, 49, 50 porte sur sa périphérie interne des pattes 51 s'étendant en saillie radiale vers l'intérieur du cadre, qui sont soudées aux extrémités 52 des bobines du stator 45. Chaque bobine 45 comporte une première extrémité appelée « entrée » destinée à être connectée avec l'un des cadres de phase 47, 48, 49 et une deuxième extrémité appelée « sortie » destinée à être reliée au cadre de neutre 50. Les « entrées » des bobines sont alternativement connectées aux cadres de phases 47, 48, 49. Chaque cadre de phase 47, 48, 49 comporte sur sa périphérie externe un terminal de connexion, non représenté, pour l'interconnexion avec un connecteur de puissance lui-même relié à un onduleur décrit par exemple dans le document EP 0 831 580. The electric machine 3 is a polyphase electric machine. The stator 4 of the electric machine 3 comprises a winding equipped with a plurality of coils 45 distributed circumferentially around the axis X. The coils 45 are interconnected with each other by means of an interconnector 46. The interconnector 46 is offset axially with respect to the coils 45, towards the gearbox. In the illustrated embodiment, the interconnector 46 has four ring-shaped frames 47, 48, 49, 50 extending in a radial plane. The frames 47, 48, 49, 50 are electrically conductive, for example made of copper or advantageously of another weldable metallic material. These frames 47, 48, 49, 50 are stacked axially on each other and electrically isolated from each other. Preferably, the frames are embedded in a body made of electrically insulating material, such as plastics material. Each frame 47, 48, 49, 50 carries on its inner periphery lugs 51 extending radially inwards towards the frame, which are welded to the ends 52 of the stator coils 45. Each coil 45 has a first end called "Input" intended to be connected with one of the phase frames 47, 48, 49 and a second end called "output" intended to be connected to the neutral frame 50. The "inputs" of the coils are alternately connected to the frames of phases 47, 48, 49. Each phase frame 47, 48, 49 comprises on its outer periphery a connection terminal, not shown, for interconnection with a power connector which is itself connected to an inverter described for example in FIG. EP 0 831 580.
Le rotor 5 est un rotor à aimants permanents. Il comporte un corps 53 formé d'un paquet de tôles empilées selon la direction axiale et des aimants permanents 54 implantés radialement dans les tôles du paquet de tôles, en périphérie externe du rotor 5.  The rotor 5 is a rotor with permanent magnets. It comprises a body 53 formed of a stack of laminations stacked in the axial direction and permanent magnets 54 implanted radially in the laminations of the sheet bundle at the outer periphery of the rotor 5.
Par ailleurs, l'ensemble de transmission est équipé d'un amortisseur pendulaire 55. L'amortisseur pendulaire 55 comporte un organe de support 56 et une pluralité de masselottes pendulaires 57 circonferentiellement réparties sur l'organe de support 56. Les masselottes 57 sont aptes à osciller par rapport à l'organe de support 56 dans un plan orthogonal à l'axe de rotation X, en réaction aux irrégularités de rotation.  Furthermore, the transmission assembly is equipped with a pendulum damper 55. The pendulum damper 55 comprises a support member 56 and a plurality of pendulum weights 57 circumferentially distributed on the support member 56. The weights 57 are suitable oscillating relative to the support member 56 in a plane orthogonal to the axis of rotation X, in response to the irregularities of rotation.
Comme représenté de manière détaillée sur la figure 2, chaque masselotte 57 comporte deux flancs 58, 59 qui s'étendent axialement de part et d'autre de l'organe de support 56 et sont reliées axialement l'un à l'autre par l'intermédiaire de deux entretoises de liaison 60. Chaque entretoise de liaison 60 traverse axialement une ouverture 61 associée de l'organe de support 56. De plus, les oscillations des masselottes 57 sont guidées par des moyens de guidage comportant, pour chaque masselotte, deux éléments de roulement 62 qui coopèrent chacun avec une première piste de roulement portée par l'organe de support 56 et avec une deuxième piste de roulement, portée par la masselotte 57, et s'étendant en vis-à-vis de la première piste de roulement. Les premières pistes de roulement sont formées par le bord extérieur des ouvertures 61 de passage des entretoises 60. Les deuxièmes pistes de roulement sont portées par les entretoises 60 reliant les flancs de chaque masselotte 57. Les éléments de roulement 62 sont, par exemple, formés par un rouleau cylindrique de section circulaire. Les premières et les deuxièmes pistes de roulement présentent une forme générale épicycloïdale et sont agencées de telle sorte que la fréquence d'oscillation des masselottes 57 soit proportionnelle à la vitesse de rotation de l'arbre menant. Les masselottes 57 comportent, en outre, des éléments de butée 63 en matériau élastomère permettant d'amortir les chocs, lorsque les masselottes 57 arrivent en fin de course ou lors de l'arrêt moteur. Les éléments de butée 63 sont ici disposés entre les deux flancs 58, 59 de chaque masselotte 57 et viennent en butée contre le bord des ouvertures 61 de passage des entretoises 60. As shown in detail in FIG. 2, each weight 57 comprises two flanks 58, 59 which extend axially on either side of the support member 56 and are connected axially to each other by the intermediate of two connecting struts 60. Each connecting strut 60 passes axially through an associated opening 61 of the support member 56. In addition, the oscillations of the weights 57 are guided by guiding means comprising, for each weight, two rolling elements 62 which each cooperate with a first runway carried by the support member 56 and with a second raceway, carried by the flyweight 57, and extending vis-à-vis the first raceway. The first race tracks are formed by the outer edge of the passage openings 61 of the spacers 60. The second raceways are carried by the spacers 60 connecting the flanks of each flyweight 57. The rolling elements 62 are, for example, formed by a cylindrical roller of circular section. The first and second race tracks have a generally epicyclic shape and are arranged such that the oscillation frequency of the flyweights 57 is proportional to the rotational speed of the drive shaft. The weights 57 further comprise stop elements 63 made of elastomer material for damping shocks when the weights 57 arrive at the end of the stroke or when the engine is stopped. The abutment elements 63 are here arranged between the two sides 58, 59 of each counterweight 57 and abut against the edge of the openings 61 for the passage of the spacers 60.
Comme représenté sur la figure 1 , l'organe de support 56 de l'amortisseur pendulaire 55 est un disque présentant à proximité de son bord radialement interne des orifices permettant le passage d'organes de fixation 42 à l'arbre intermédiaire 24. Dans le mode de réalisation représenté, l'organe de support 56 de l'amortisseur pendulaire 55 et le moyeu 38 de support du rotor 5 sont fixés à la collerette 40 de l'arbre intermédiaire 24 par des moyens de fixations communs.  As shown in FIG. 1, the support member 56 of the pendular damper 55 is a disc having, near its radially inner edge, orifices allowing the passage of fasteners 42 to the intermediate shaft 24. In the embodiment shown, the support member 56 of the pendular damper 55 and the hub 38 for supporting the rotor 5 are fixed to the flange 40 of the intermediate shaft 24 by common fastening means.
L'amortisseur pendulaire 55 s'étend, par rapport au rotor 5, du côté de la boîte de vitesses et est au moins partiellement logé à l'intérieur de l'interconnecteur 46. En d'autres termes, au moins une portion de l'amortisseur pendulaire 55 s'étend dans le plan de l'interconnecteur 46, radialement à l'intérieur de celui-ci. Dans un mode de réalisation, l'amortisseur pendulaire 55 est intégralement logé à l'intérieur de l'interconnecteur 46.  The pendular damper 55 extends, relative to the rotor 5, on the transmission side and is at least partially housed inside the interconnector 46. In other words, at least a portion of the pendulum damper 55 extends in the plane of the interconnector 46, radially inside thereof. In one embodiment, the pendulum damper 55 is integrally housed inside the interconnector 46.
Selon un mode de réalisation de l'invention, afin de ne pas perturber le fonctionnement de la machine électrique, l'organe de support 56 et/ou les masselottes pendulaires 57 sont réalisés dans un matériau amagnétique, tel qu'un polymère ou de l'aluminium.  According to one embodiment of the invention, in order not to disrupt the operation of the electric machine, the support member 56 and / or the pendulum weights 57 are made of a non-magnetic material, such as a polymer or polymer. 'aluminum.
Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. 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.
L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication. L'usage de l'article indéfini « un » ou « une » pour un élément ou une étape n'exclut pas, sauf mention contraire, la présence d'une pluralité de tels éléments ou étapes.  The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.
Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.  In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

REVENDICATIONS
1. Ensemble de transmission pour véhicule automobile, destiné à être disposé entre un moteur thermique équipé d'un vilebrequin et une boîte de vitesses équipée d'un arbre d'entrée, ledit ensemble comprenant : A transmission assembly for a motor vehicle, intended to be disposed between a heat engine equipped with a crankshaft and a gearbox equipped with an input shaft, said assembly comprising:
- une machine électrique (3) comportant un stator (4) externe et un rotor (5) interne mobile en rotation autour d'une axe X et destiné à être accouplé en rotation à l'arbre d'entrée de la boîte de vitesses ;  - An electric machine (3) comprising an external stator (4) and an inner rotor (5) rotatable about an axis X and intended to be coupled in rotation to the input shaft of the gearbox;
- un embrayage (2), disposé par rapport à la machine électrique du côté du moteur thermique, agencé pour accoupler ou désaccoupler en rotation le vilebrequin du moteur thermique et le rotor (5) ; et  - A clutch (2), arranged relative to the electric machine on the engine side, arranged to couple or uncouple in rotation the crankshaft of the engine and the rotor (5); and
- un amortisseur pendulaire (55) comportant un organe de support (56) annulaire, solidaire en rotation du rotor (5), et des masselottes pendulaires (57) montées mobiles sur l'organe de support (56) ;  - A pendulum damper (55) comprising an annular support member (56), integral in rotation with the rotor (5), and pendulum weights (57) movably mounted on the support member (56);
dans lequel le stator (4) comporte des bobines (45) circonférentiellement réparties autour de l'axe X et un interconnecteur (46) de forme annulaire, pour interconnecter les bobines (45), ledit interconnecteur (46) étant décalé axialement par rapport aux bobines (45) du côté de la boîte de vitesses ; et wherein the stator (4) comprises coils (45) circumferentially distributed about the X axis and an annular interconnector (46) for interconnecting the coils (45), said interconnector (46) being axially offset relative to the coils (45) on the transmission side; and
dans lequel l'amortisseur pendulaire (55) est au moins partiellement, logé radialement à l'intérieur de l'interconnecteur (46). wherein the pendulum damper (55) is at least partially radially disposed within the interconnector (46).
2. Ensemble de transmission selon la revendication 1 , dans lequel l'embrayage (2) comporte un disque de friction (20) qui est solidaire en rotation du rotor (5) par l'intermédiaire d'un arbre intermédiaire (24), le rotor (5) présentant une ouverture centrale au travers de laquelle passe l'arbre intermédiaire (24).  2. Transmission assembly according to claim 1, wherein the clutch (2) comprises a friction disc (20) which is integral in rotation with the rotor (5) via an intermediate shaft (24), the rotor (5) having a central opening through which the intermediate shaft (24) passes.
3. Ensemble selon la revendication 2, dans lequel l'arbre intermédiaire (24) comporte une collerette (40) et dans lequel le rotor (4) est monté solidaire en rotation de l'arbre intermédiaire (24) par l'intermédiaire d'un moyeu de support (38), ledit moyeu de support (38) comportant une jupe axiale (39) de support du rotor (4) et une bride interne (41 ) s'étendant radialement vers l'intérieur de la jupe axiale (39) fixée à la collerette (40) de l'arbre intermédiaire (24) par des organes de fixation (42).  3. The assembly of claim 2, wherein the intermediate shaft (24) comprises a flange (40) and wherein the rotor (4) is mounted integral in rotation with the intermediate shaft (24) via a support hub (38), said support hub (38) having an axial skirt (39) for supporting the rotor (4) and an inner flange (41) extending radially inwardly of the axial skirt (39); ) fixed to the flange (40) of the intermediate shaft (24) by fasteners (42).
4. Ensemble selon la revendication 2 ou 3, dans lequel l'arbre intermédiaire (24) comporte une collerette (40) et dans lequel l'organe de support (56) de l'amortisseur pendulaire (55) est fixé à la collerette (40) de l'arbre intermédiaire (24) par des organes de fixation (42). 4. An assembly according to claim 2 or 3, wherein the intermediate shaft (24) comprises a flange (40) and wherein the support member (56) of the pendulum damper (55) is fixed to the flange (40) of the intermediate shaft (24) by fasteners (42).
5. Ensemble selon la revendication 3 et la revendication 4, dans lequel la bride interne (40) du moyeu de support (38) du rotor (5) et l'organe de support (56) de l'amortisseur pendulaire (55) sont fixés à la collerette (40) de l'arbre intermédiaire (24) par des organes de fixation (42) communs.  An assembly according to claim 3 and claim 4, wherein the inner flange (40) of the rotor support hub (38) (5) and the pendulum damper support member (56) are attached to the flange (40) of the intermediate shaft (24) by common fasteners (42).
6. Ensemble selon l'une des revendications 2 à 5, dans lequel l'arbre intermédiaire (24) comporte un alésage cannelé (43) destiné à recevoir une extrémité (44) de l'arbre d'entrée de la boîte de vitesses.  6. An assembly according to one of claims 2 to 5, wherein the intermediate shaft (24) comprises a splined bore (43) for receiving an end (44) of the input shaft of the gearbox.
7. Ensemble selon l'une quelconque des revendications 1 à 6, dans lequel les masselottes pendulaires (57) comportent deux flancs (58, 59) s'étendant axialement de part et d'autre de l'organe de support (56) et sont reliés l'un à l'autre par l'intermédiaire de deux entretoises de liaison (60) traversant axialement une ouverture (61 ) associée de l'organe de support (56).  7. An assembly according to any one of claims 1 to 6, wherein the pendulum weights (57) comprise two flanks (58, 59) extending axially on either side of the support member (56) and are connected to each other by means of two connecting struts (60) axially passing through an associated opening (61) of the support member (56).
8. Ensemble selon l'une quelconque des revendications 1 à 7, dans lequel l'interconnecteur (46) comporte au moins quatre cadres (47, 48, 49, 50) de forme annulaire, empilés axialement les uns sur les autres et isolés entre eux, chaque cadre (47, 48, 49, 50) portant sur sa périphérie interne des pattes (51 ) s'étendant en saillie vers l'intérieur du cadre (47, 48, 49, 50) connectées à des extrémités (52) des bobines (45).  8. An assembly according to any one of claims 1 to 7, wherein the interconnector (46) comprises at least four frames (47, 48, 49, 50) of annular shape, stacked axially on each other and isolated between them, each frame (47, 48, 49, 50) carrying on its inner periphery tabs (51) projecting inwardly from the frame (47, 48, 49, 50) connected to ends (52). coils (45).
9. Ensemble selon l'une quelconque des revendications 1 à 9, comportant en outre un double volant amortisseur (1 ) comprenant :  9. An assembly according to any one of claims 1 to 9, further comprising a double damping flywheel (1) comprising:
- un volant primaire (6), destiné à être fixé au vilebrequin du moteur thermique, et un volant secondaire (7) configuré pour former un plateau de réaction de l'embrayage (2), lesdits volants primaire (6) et secondaire (7) étant mobiles en rotation l'un par rapport à l'autre autour d'un axe de rotation X ; et  a primary flywheel (6), intended to be fixed to the crankshaft of the heat engine, and a secondary flywheel (7) configured to form a reaction plate of the clutch (2), said primary flywheels (6) and secondary flywheel (7). ) being rotatable relative to each other about an axis of rotation X; and
- un amortisseur de torsion organes élastiques pour transmettre un couple et amortir les acyclismes de rotation entre les volants primaire (6) et secondaire (7).  - A torsion damper resilient members for transmitting torque and damping rotational acyclisms between the primary (6) and secondary (7) flywheels.
10. Ensemble selon l'une quelconque des revendications 1 à 9, comportant un élément de support (25) pourvu d'éléments de fixation au bloc moteur et/ou à la boîte de vitesses et comportant une paroi périphérique externe dont la surface interne coopère avec la périphérie externe du stator (4), un voile interne (26) s'étendant entre l'embrayage (2) et la machine électrique (3), l'élément de support (25) définissant en outre un logement s'étendant à l'intérieur d'un alésage du rotor (5) et permettant de loger au moins partiellement une butée (21 ) d'actionnement de l'embrayage (2). 10. An assembly according to any one of claims 1 to 9, comprising a support member (25) provided with fixing elements to the engine block and / or the gearbox and having an outer peripheral wall whose inner surface cooperates with the outer periphery of the stator (4), a veil inner member (26) extending between the clutch (2) and the electric machine (3), the support member (25) further defining a housing extending within a bore of the rotor (5). ) and for accommodating at least partially an abutment (21) for actuating the clutch (2).
11. Ensemble selon la revendication 10 et la revendication 2, dans lequel l'arbre intermédiaire (24) coopère avec l'élément de support (25) par l'intermédiaire d'un palier (30) supportant et guidant en rotation l'arbre intermédiaire (24) par rapport à l'élément de support (25).  11. An assembly according to claim 10 and claim 2, wherein the intermediate shaft (24) cooperates with the support member (25) via a bearing (30) supporting and guiding in rotation the shaft intermediate (24) relative to the support member (25).
PCT/FR2014/052939 2013-11-22 2014-11-17 Transmission assembly for a hybrid vehicle provided with a damper WO2015075365A2 (en)

Applications Claiming Priority (2)

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FR1361526A FR3013640B1 (en) 2013-11-22 2013-11-22 TRANSMISSION ASSEMBLY FOR A HYBRID VEHICLE EQUIPPED WITH A PENDULAR SHOCK ABSORBER
FR1361526 2013-11-22

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EP3254878A1 (en) * 2016-06-09 2017-12-13 Valeo Embrayages Torque transmission device, in particular for a motor vehicle
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