WO2023217871A1 - Reducteur de vitesse de groupe motopropulseur hybride - Google Patents
Reducteur de vitesse de groupe motopropulseur hybride Download PDFInfo
- Publication number
- WO2023217871A1 WO2023217871A1 PCT/EP2023/062438 EP2023062438W WO2023217871A1 WO 2023217871 A1 WO2023217871 A1 WO 2023217871A1 EP 2023062438 W EP2023062438 W EP 2023062438W WO 2023217871 A1 WO2023217871 A1 WO 2023217871A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electric machine
- speed reducer
- pump
- output shaft
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
- F16H57/0441—Arrangements of pumps
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0457—Splash lubrication
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
- F16H57/0494—Gearings with spur or bevel gears with variable gear ratio or for reversing rotary motion
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- 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
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
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- 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
- 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 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 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
- B60K2006/4833—Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range
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- 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
- 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 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 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 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
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- 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
- 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 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 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
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- 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
- 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 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
- B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/03—Lubrication
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- 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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- 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
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds
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- 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
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
- F16H3/089—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
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- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
Definitions
- the present invention generally relates to the hybridization of powertrains.
- a speed reducer typically a gearbox
- a gearbox comprising an external casing which houses at least one shaft and a pinion and which comprises a cooling and lubrication circuit adapted to project a lubricating fluid onto said shaft and pinion.
- a motor vehicle comprising a powertrain which comprises an internal combustion engine and such a speed reducer.
- a motor vehicle is equipped with a powertrain.
- This powertrain can have very varied architectures.
- it may include an internal combustion engine, a clutch, a gearbox and a differential which makes it possible to distribute the torque coming from the gearbox to two drive wheels of the vehicle.
- a water cooling circuit including a main heat exchanger located at the front of the vehicle (the “radiator”), then makes it possible to cool the internal combustion engine in order to prevent it from heating up too much.
- the electric machine is then generally positioned near the internal combustion engine or the radiator, so as to be able to take advantage of the water circuit to be cooled.
- the present invention proposes to incorporate the electric machine with its cooling and lubrication system into the gearbox.
- an electric machine which comprises an output shaft coupled to said at least one shaft of the reducer
- a pump which is actuated by the electric machine and which is adapted to cool and lubricate the electric machine using said lubricating fluid.
- the components of the speed reducer and the electrical machine are lubricated and cooled by the same volume of lubricant, which makes it possible to reduce the overall size of the assembly.
- the lubrication and cooling of the electric machine are ensured by this electric machine, which drives the pump. It is thus possible to provide a fluid flow adjusted to the speed of the electrical machine to ensure always adequate lubrication and cooling, neither too low nor too high (which would reduce efficiency unnecessarily).
- the invention it is notably possible to house the components of the speed reducer and the electrical machine in the same casing.
- the installation of the electric machine in the speed reducer housing then proves to be relatively unrestrictive, in particular because the system allowing it to be cooled is more compact than a water cooling system.
- a speed reduction means is provided, an input of which is coupled to the output shaft of the electric machine and an output of which is coupled to said pump;
- the speed reduction means has a reduction ratio less than 1/2;
- the external casing delimits three distinct chambers, including a first chamber which houses the electrical machine, a second chamber which houses the speed reduction means and a third chamber which houses the pump;
- the speed reduction means and the pump have a common axis of rotation
- the speed reduction means and/or the pump comprises a drive shaft which is located in alignment with the output shaft of the electric machine and which has an internal longitudinal conduit through which the lubricating fluid circulates ;
- the output shaft of the electric machine has, over at least part of its length, an internal longitudinal conduit through which the lubricating fluid circulates;
- the output shaft of the electric machine has at least one radial opening allowing the lubricating fluid circulating in the internal longitudinal conduit to be ejected out of the output shaft.
- the invention also proposes a motor vehicle comprising a powertrain which comprises an internal combustion engine and a speed reducer as mentioned above.
- FIG. 1 is a schematic view of a gearbox according to the invention
- FIG. 2 is a view of a portion of the gearbox housing of Figure 1, on the left of which is shown an electric machine coupled to a speed reduction means and a pump;
- FIG. 3 is a sectional view of the portion of the casing of Figure 2, on which appear the electric machine, the speed reduction means and the pump;
- FIG. 4 is an exploded view of a first part of the gearbox of Figure 1;
- FIG. 5 is an exploded view of a second part of the gearbox of Figure 1, on which the part of Figure 4 is shown in the assembled position;
- FIG. 6 is a view similar to that of Figure 3, on which the oil path is shown.
- FIG 1 there is shown a speed reducer of a group powertrain. This is more precisely a gearbox 10, but as a variant, it could be a simpler reduction gear (single-speed, or even two-speed).
- the powertrain is preferably intended to be installed in a motor vehicle.
- This motor vehicle can come in different forms. For example, it could be a truck, a motorcycle, a plane, a boat... However, it is preferably a car.
- This powertrain is described as hybrid. It then comprises an internal combustion engine (not shown) and an electric machine 200.
- the internal combustion engine comprises a crankshaft which is coupled to the gearbox 10, possibly via a clutch.
- the electric machine 200 can have a function as a motor (its torque being added to that developed by the internal combustion engine), or as an alternator (its torque being reduced from that developed by the internal combustion engine), or both depending on the conditions encountered.
- This electric machine 200 is here coupled to the rest of the powertrain at the level of the gearbox 10. We therefore speak of a hybridized gearbox 10.
- the gearbox comprises an external casing 100 which houses shafts 20, 30 and pinions 40, 50 in order to offer several gear ratios.
- This gearbox could come in different forms: manual gearboxes, robotic gearboxes, automatic gearboxes, etc.
- gearbox 10 may comprise two shafts 20, 30 provided with facing gears 40, 50 of different diameters which mesh with each other, the gears 50 of one of the shafts 30 being for example mounted idle on this shaft (that is to say being left free to rotate on this shaft) while the others are fixedly mounted on the other shaft 20.
- gearbox 10 uses coupling devices (we speak of a player) designed to couple one of the idler gears 50 with the shaft 30 so as to equalize their rotational speeds.
- Such a gearbox 10 also houses a main lubrication and cooling circuit 60, which takes a lubricating fluid such as oil from the bottom of the casing 100 to eject it at different locations requiring lubrication. and cooled. This part of the gearbox 10 will not be described here in more detail as it is well known.
- the casing 100 of this gearbox delimits a main chamber which houses the aforementioned shafts 20, 30 and pinions 40, 50.
- this casing 100 has an excrescence so as to be able to accommodate in particular the electrical machine 200.
- This excrescence comprises several parts, so as to facilitate the assembly of the entire hybridized gearbox. It is here formed of four parts 110, 120, 130, 140 which are fixed together so as to house the electrical machine 200 as well as a speed reduction means 300 and an oil pump 400 (these three elements 200, 300, 400 being shown in detail on the left part of Figure 2).
- the casing 100 houses not only the electric machine 200, but also an oil pump 400 specifically and exclusively designed to cool and lubricate the electric machine 200.
- the speed reduction means 300 is then employed so that the electric machine 200 can mechanically actuate the oil pump 400 at an ideal speed to ensure this cooling and lubrication.
- the oil used for this purpose will be the same as that used to cool and lubricate the other components of the gearbox. So, here, this oil will be taken from the bottom of the crankcase 100.
- the electric machine 200, the speed reduction means 300 and the oil pump 400 are here successively stacked on the same axis (called axis of rotation A1), so as to present a reduced bulk.
- the electric machine 200 conventionally comprises a rotor 230, for example a permanent magnet rotor or a wound rotor, and a stator 220 located around the rotor 230 and comprising electric coils allowing 'establish a rotating magnetic field suitable for rotating the rotor.
- a rotor 230 for example a permanent magnet rotor or a wound rotor
- a stator 220 located around the rotor 230 and comprising electric coils allowing 'establish a rotating magnetic field suitable for rotating the rotor.
- the rotor 230 is equipped with an output shaft 201 which is therefore adapted to rotate around the axis of rotation A1.
- this output shaft 201 is equipped with two ball bearings engaged in openings provided in two flanges 210, 211 fixed to the stator 220, on either side of it. These two flanges are here held in position by bolts.
- a longitudinal drilling 201A is in fact provided which extends over the majority of this shaft, along the axis of rotation A1.
- This longitudinal drilling 201 A therefore opens on the side of the oil pump 400. As will clearly appear in the remainder of this presentation, it allows the oil to enter inside the electrical machine 200.
- two series of radial openings 201 B are provided here, located near the two ball bearings and which allow the oil to be ejected towards them and towards the windings of the stator 220 in order to cool the entire electric machine 200 and lubricate it.
- the electric machine 200 is fixed to a first part 110 of the casing 100 by screws 111, here four in number.
- screws 111 here four in number.
- two centering pins 112 are used to best adjust the position of the electric machine 200 relative to this first part 110 of the casing 100.
- a second part 120 of the casing 100 is then screwed onto this first part 110 to enclose the electrical machine 200.
- This enclosure is of course not complete, since openings are provided so that the The oil opening into the electric machine 200 can flow by gravity towards the bottom of the casing, via openings provided for this purpose.
- the first and second parts 110, 120 of the casing 100 together delimit a space for the electric machine 200, which is part of the first chamber (which we recall houses the shafts and pinions of the gearbox).
- the oil flowing by gravity into this space will naturally evacuate towards the bottom of the casing 100, that is to say towards the bottom of the first chamber 200A delimited by the casing 100.
- the first part 110 of the casing 100 comprises a main wall substantially flat and orthogonal to the axis of rotation A1, with a rim in the form of a flange for its attachment to the second part 120 of the casing 100.
- This second part comprises as to it a curved side wall around the electric machine 200, which is open on the side of the first part 110 of the casing but which is closed on the opposite side by a substantially flat wall at the center of which is provided an opening 121 for the passage of the right end of the output shaft 201 of the electric machine 200.
- the seal at this opening 121 is here ensured by a seal 122, preferably of the lip seal type to withstand the high rotational speeds of the output shaft 201.
- This seal is fixed in the opening 121 so that his lip rests on the output shaft.
- the speed reduction means 300 is directly coupled to this output shaft, without any member interposing between the two.
- This speed reduction means 300 could be presented in very varied forms.
- this speed reduction means 300 is of the epicyclic train type. Also preferably, its input and output axes are coaxial.
- this speed reduction means comprises a fixed crown 340, a central planetary pinion 310, and a planetary carrier 320 equipped with at least one meshed planetary pinion 330 with the central pinion 310 and the fixed crown 340.
- the fixed crown 340 is here forcefully engaged in a bore provided in the second part 120 of the casing 100.
- This bore is here made hollow in the right side of this second part 120 of the casing 100, so that its bottom is formed by the wall in which the opening 121 for the passage of the output shaft 201 of the electric machine is located.
- This fixed crown 340 has an external face adjusted to the shape of the bore, and an internal face presenting straight teeth regularly distributed around the axis of rotation A1.
- the central pinion 310 is mounted on the right end of the output shaft 201 of the electric machine 200. It is mounted in a fixed manner relative to this output shaft 201, for example by force mounting or via a splined connection coupled to an axial stop (here a 311 circlip). Other means of connection could of course be used.
- the planet carrier 320 here comprises a shaft (called “drive shaft 301”), one left end of which is fixed to a flange here in the shape of a cross, each branch of which extends radially relative to the axis of rotation A1.
- Each of the ends of these branches has a shaft on which a satellite pinion 330 is freely pivoted, around an axis parallel to the axis of rotation A1.
- the speed reduction means 300 is provided for be housed in a second chamber 300A delimited by the casing 100, which may optionally be sealed relative to the first chamber 200A.
- the casing 100 comprises a third tubular part 130, a left end of which is attached against the second part 120 of the casing and a right end of which is closed by a flat wall.
- This wall is pierced with a central opening 131 for the passage of the drive shaft 301.
- the seal at this opening 131 is here ensured by a seal 132, preferably of the lip seal type to withstand the high rotational speeds of the drive shaft 301.
- This seal is fixed in the opening 131 so that its lip rests on the drive shaft 301.
- the drive shaft 301 is then mounted to rotate freely in this third part 130 of the casing 100, around the axis of rotation A1, thanks to a ball bearing 133 which is engaged in a housing provided in this third part 130, next to opening 131.
- the third part 130 of the casing is equipped on each of its two faces with two centering pins 136 to allow precise adjustment of the different parts of the casing 100 between them, which guarantees perfect adjustment between the axis of the output shaft 201 and the axis of the drive shaft 301.
- the drive shaft 301 is hollow.
- a longitudinal drilling 301A is in fact provided which extends over the entire length of this shaft, along the axis of rotation A1.
- This longitudinal drilling 301 A therefore opens on the side of the oil pump 400 and on the side of the electrical machine 200. As will clearly appear later in this presentation, it allows the oil to enter inside the electric machine 200. It is here connected to the output shaft 201 by a cannula 500 which is huddled in the output shaft 201 (so that it is fixed there) and which pivots freely relative to the shaft training 301.
- the oil pump 400 is then installed to the right of the third part 130 of the casing 100, in a chamber 400A which is sealed and which is delimited by the third and fourth parts 130 , 140 of housing 100.
- This oil pump 400 is installed directly on the drive shaft 131, which allows its size to be restricted. It is therefore centered on the axis of rotation A1.
- This type of pump has a flow rate which depends directly on the rotation speed of the drive shaft 301, which is perfectly suited to the needs of the electric machine 200.
- FIG. 5 it comprises a toothed wheel 420 having a central opening through which it is fixedly mounted on the drive shaft 301.
- This assembly could be carried out by force or by shrinking. However, here, it was chosen to use a key which is blocked in grooves provided in the drive shaft 301 and in the central opening of the toothed wheel 420.
- the right end of the shaft drive 301 is threaded so that a nut 421 can be screwed there to lock the toothed wheel 420.
- a bore is provided in the third part 130 of the casing 100.
- This bore is here made hollow in the right side of this third part 130 of the casing 100, so that its bottom is formed by the wall in which the opening 131 for the passage of the drive shaft 301 is located.
- the pump then includes an eccentric crown 410 with internal teeth which is placed inside this bore.
- the fourth part 140 of the casing 100 is adapted to rest against the third part 130 to enclose the pump 400.
- it has a disc shape, with four pierced ears allowing the passage of screws which pass through the third part of the casing 100 and are screwed into the second part 120.
- a flat gasket 145 is used to ensure static sealing between these two casing parts 130, 140.
- the fourth part 140 of the casing 100 has a projecting bulge on its external face, which extends in length radially relative to to the axis of rotation A1.
- This bulge internally delimits a radial conduit 142 which makes it possible to bring the oil coming from the pump 400 into an orifice provided longitudinally in the cover, along the axis of rotation A1.
- This orifice is connected inside the drive shaft 301 by a cannula 501 which is fitted into the casing and which can pivot freely relative to this shaft.
- the first bore 137, the intermediate conduit 141 and the radial conduit 142 are made by drilling, which explains the use of plugs 139, 149 placed at their outlet to the outside.
- plugs 139, 149 placed at their outlet to the outside.
- they could be made differently, for example during the casting stage of the casing, or they could be replaced by external pipes in order to guide the flow of oil from the pump discharge zone towards the axis oil return.
- the output shaft 201 of the electric machine 200 When the output shaft 201 of the electric machine 200 is subjected to a rotation speed Q1, it drives, via the speed reduction means 300, the drive shaft 301 at a reduced rotation speed Q2, adapted to the operation of the oil pump 400.
- the toothed wheel 420 will give the eccentric crown 410 an eccentric circular movement which will create suction on the side of the drilling 137 and discharge on the opposite side.
- the flow of oil used to lubricate and cool the electrical machine can reach a maximum value which is greater than 2 L/min, and which is here of the order of 6 L/min when the electric machine reaches a rotation speed of 18,000 rpm.
- the oil supply circuit of the oil pump 400 will preferably include a non-return valve type valve (not shown) in order to prevent the oil pump 400 from rising. (the latter being above the gearbox oil level). It could also include a heat exchanger to cool the oil.
- the lubrication of the speed reduction means can be carried out in several ways. Lifetime lubrication can be used, by enclosing a lubricant in chamber 300A when assembling the gearbox. Alternatively, a filling plug could be provided in the casing allowing a lubricant to be added to this 300A chamber and drained if necessary. Still as a variant, orifices could be provided in the wall separating the chambers 200A, 300A, so that the oil from the electric machine can be projected onto the speed reduction means 300. [0096] The present invention is in no way limited to the embodiment described and represented, but those skilled in the art will be able to make any variation conforming to the invention. [0097] In particular, it could be envisaged that the oil lubricating the components of the gearbox and the electrical machine 100 be stored not in the bottom of the casing, but in a dedicated oil tank located outside the casing, under this last.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23726915.4A EP4522890A1 (fr) | 2022-05-12 | 2023-05-10 | Reducteur de vitesse de groupe motopropulseur hybride |
| CN202380052953.XA CN119546882A (zh) | 2022-05-12 | 2023-05-10 | 混合动力总成减速齿轮 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2204523 | 2022-05-12 | ||
| FR2204523A FR3135500B1 (fr) | 2022-05-12 | 2022-05-12 | Réducteur de vitesse de groupe motopropulseur hybride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023217871A1 true WO2023217871A1 (fr) | 2023-11-16 |
Family
ID=82319799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/062438 Ceased WO2023217871A1 (fr) | 2022-05-12 | 2023-05-10 | Reducteur de vitesse de groupe motopropulseur hybride |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4522890A1 (fr) |
| CN (1) | CN119546882A (fr) |
| FR (1) | FR3135500B1 (fr) |
| WO (1) | WO2023217871A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES3034925A1 (es) * | 2024-02-21 | 2025-08-26 | Sinobas Antonio Salces | Acoplamiento mecánico-hidráulico |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050211490A1 (en) * | 2004-03-03 | 2005-09-29 | Hitachi, Ltd. | Vehicle drive device and four-wheel drive with motor |
| US20110319215A1 (en) * | 2009-03-02 | 2011-12-29 | Toyota Jidosha Kabushiki Kaisha | Lubrication of a planetary gear device |
| US11114921B2 (en) * | 2018-01-24 | 2021-09-07 | Toyota Jidosha Kabushiki Kaisha | Vehicle drive device for lubrication a power transmission and cooling a rotating electric machine |
-
2022
- 2022-05-12 FR FR2204523A patent/FR3135500B1/fr active Active
-
2023
- 2023-05-10 EP EP23726915.4A patent/EP4522890A1/fr active Pending
- 2023-05-10 WO PCT/EP2023/062438 patent/WO2023217871A1/fr not_active Ceased
- 2023-05-10 CN CN202380052953.XA patent/CN119546882A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050211490A1 (en) * | 2004-03-03 | 2005-09-29 | Hitachi, Ltd. | Vehicle drive device and four-wheel drive with motor |
| US20110319215A1 (en) * | 2009-03-02 | 2011-12-29 | Toyota Jidosha Kabushiki Kaisha | Lubrication of a planetary gear device |
| US11114921B2 (en) * | 2018-01-24 | 2021-09-07 | Toyota Jidosha Kabushiki Kaisha | Vehicle drive device for lubrication a power transmission and cooling a rotating electric machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES3034925A1 (es) * | 2024-02-21 | 2025-08-26 | Sinobas Antonio Salces | Acoplamiento mecánico-hidráulico |
| WO2025176921A1 (fr) * | 2024-02-21 | 2025-08-28 | Antonio Salces Sinobas | Accouplment mécano-hydraulique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119546882A (zh) | 2025-02-28 |
| EP4522890A1 (fr) | 2025-03-19 |
| FR3135500A1 (fr) | 2023-11-17 |
| FR3135500B1 (fr) | 2024-05-24 |
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