WO2024052606A1 - Motor vehicle propulsion unit having a traction machine equipped with electric pumps - Google Patents

Motor vehicle propulsion unit having a traction machine equipped with electric pumps Download PDF

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Publication number
WO2024052606A1
WO2024052606A1 PCT/FR2023/051111 FR2023051111W WO2024052606A1 WO 2024052606 A1 WO2024052606 A1 WO 2024052606A1 FR 2023051111 W FR2023051111 W FR 2023051111W WO 2024052606 A1 WO2024052606 A1 WO 2024052606A1
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WO
WIPO (PCT)
Prior art keywords
cradle
flange
pump
support
screw
Prior art date
Application number
PCT/FR2023/051111
Other languages
French (fr)
Inventor
Yousra Bouchrek
Amal KHOUKHI
Mouhsine Ait Baghdad
Original Assignee
Stellantis Auto Sas
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 Stellantis Auto Sas filed Critical Stellantis Auto Sas
Publication of WO2024052606A1 publication Critical patent/WO2024052606A1/en

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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F01P2005/125—Driving auxiliary pumps electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position

Definitions

  • the present invention relates to a motor vehicle powertrain comprising an electric traction machine equipped with a support receiving at least one electric pump, as well as a method of assembling this group and an electric motor vehicle comprising this group.
  • Electric vehicles generally include a heat exchange fluid circuit which draws calories from the traction machine and the power electronics to regulate their temperature in order to optimize their operation.
  • the cooling fluid circuit may include other components such as a heat exchanger for cooling the fluid to dissipate calories to the outside, a heat exchanger for heating the passenger compartment or a system for heating the fluid.
  • Certain vehicles include electric fluid circulation pumps mounted on a support fixed to the side of the electric machine, which makes it possible to produce short pipes between these components, and to offer a compact assembly that is easier to accommodate. in the engine compartment.
  • a type of known assembly comprising two pumps, presented in particular by document EP-A1 -3248821, comprises for each pump a thick plate fixed on a sheet metal placed on the side of the electric machine, receiving the body of this pump which is inserted into a hole in this plate with tightening ensuring maintenance.
  • the plates have complementary shapes on one side which allow interlocking in order to link them together to secure the two pumps. All of the two plates are fixed on a support linked to the electric machine by tabs passing through these plates.
  • the present invention aims in particular to avoid these problems of the prior art.
  • a motor vehicle powertrain comprising an electric traction machine equipped with a support for at least one electric pump for circulating a cooling fluid from this group, and comprising for each pump a fixing on the support, this group being remarkable in that the support comprises for each pump a cradle receiving the body of this pump, and in that each cradle comprises an elongated flange having at one end a pivot fixed to one side of the cradle , and at the other end a tightening screw fixed in a drilling on the other side of the cradle, this screw having between the cradle and the flange a lock washer which tightens its thread.
  • An advantage of this power unit is that the support can be prepared in advance with each flange fixed to it by its pivot, the other side of the flange having its screw slightly engaged in the drilling of the cradle, being maintained raised relative to this cradle thanks to the washer which tightens its thread by placing the flange in support under the head of the screw.
  • the powertrain according to the invention may also include one or more of the following characteristics, which can be combined with each other.
  • the cradle forms a hollow having substantially a semi-circle receiving half of the pump.
  • the elongated flange forms substantially a semi-circle covering half of the pump.
  • the pivot of the flange comprises a tenon formed on this flange which fits in a groove of one end of the cradle, and a pin inserted in a bore of the cradle and a bore of the tenon to form a screed assembly.
  • the screwed end of the flange forms a flat which fits onto a flat upper end forming one side of the cradle.
  • the flat upper end on the side of the cradle has a hollow forming a countersink receiving the locking washer.
  • the lock washer made of plastic material has teeth in its internal bore which tighten on the thread of the tightening screw.
  • the subject of the invention is also a method of assembling a powertrain comprising any one of the preceding characteristics, remarkable in that it comprises a step of preparing a subassembly comprising the support, the flanges with the clamping screws partially engaged in their holes, and for each screw the lock washer which keeps the screwed end of the flange raised.
  • the flange raised around its pivot forms a lifting angle of between 5 and 10 degrees relative to its complete assembly position.
  • the invention further relates to an electric motor vehicle comprising a powertrain comprising any one of the preceding characteristics, remarkable in that the support receives two electric pumps having axes which are parallel.
  • FIG. 1 is a view of an electric machine of a powertrain according to the invention with two circulation pumps fixed on a support;
  • FIG. 2 is a detailed view of this support with the flanges presented in exploded view;
  • FIG. 3 is a detailed view of this support forming a subassembly with the flanges prepared for installing the pumps;
  • FIG. 4 is a detailed view of a locking washer of the tightening screw of each flange.
  • Figure 1 shows an electric machine 2 comprising a main axis A of rotation, receiving on the side a plate forming a substantially square support 4 made by a molding of aluminum alloy, having in each corner a drilling 6 receiving a fixing screw on the casing of this machine.
  • the support 4 comprises two cradles forming recesses arranged parallel in the upper part and in the lower part of the support, each receiving an electric pump 10 having a substantially cylindrical body arranged along the axis of rotation of its rotor A1 which is parallel to the main axis of the machine A.
  • each pump has an axial fluid inlet 12 and a tangential outlet 14 to activate the circulation of the fluid according to two temperature levels, in order to regulate the temperature of the electrical machine 2 with its power electronics, and to ensure heating of the passenger compartment.
  • each pump 10 is held in its housing of the support 4 by an elongated flange 20 arranged perpendicular to its axis of rotation, covering the body of the pump following approximately a half-turn.
  • Each flange 20 has a pivoting end 22 along an axis parallel to the axis of rotation, and another screwed end 24 held by a tightening screw.
  • the pivoting ends 22 of the two flanges 20 are in opposition on the support 4, arranged at the top and bottom of this support.
  • Figures 2 and 3 show the two cradles 30 each forming an arc of a circle receiving substantially half of the cylindrical body of the pump, having on one side a first boss 32 receiving the pivoting end of the flange 22 , and on the other side of a second boss 40 receiving the screwed end of this flange 24.
  • the first boss 32 has a central groove arranged along the axis of the flange 20, receiving a tenon formed on the the pivoting end of this flange 22.
  • a pin 38 passes through a bore in the boss 34 and a bore in the tenon 36 to produce a pivoting yoke assembly.
  • the second boss 40 has a top forming a plane passing through the axis of the pump A1, comprising a threaded bore 42 and a thin countersink surrounding this bore 44.
  • the screwed end of the flange 24 forms a flat which fits on top of the second boss 40, having a bore receiving a clamping screw 46 fitting into the tapped bore 42.
  • each flange 20 is formed by molding a plastic material, making it possible to produce in a single molding operation all the shapes comprising the drilling of the pin 36 and the drilling of the clamping screw 46.
  • Figure 4 shows a stop washer 50 produced by molding in plastic material, comprising on its internal bore three teeth 52 distributed regularly, with an internal diameter slightly less than the diameter of the tightening screw 46 in order to produce by plastic deformation of This washer provides rotational braking and axial locking on the thread of this screw.
  • the thickness of the lock washer 50 corresponds to the depth of the counterbore 44 formed on the top of the second boss 40.
  • Figure 3 shows the preparation of the support 4 with each flange 20 fixed on one side to this support by the pin 38, and on the other side the tightening screw 46 engaged in the drilling of the flange, this screw being partially tightened in the tapped hole 42.
  • the lock washer 50 is completely engaged on the locking screw 46, so as to come below the screwed end of the flange 24 in order to block this end resting under the head of the screw. We obtain a lifting of the flange 20, held by the lock washer 50, its screwed end 24 forming an angle a relative to the upper plane of the second boss 40.
  • a sub-assembly is pre-assembled with a lifting of the flange 20 forming an angle a of between 5 and 10 degrees, in particular equal to 7 degrees, which gives a lifting of approximately 10 mm constituting a housing allowing the body of the pump 10 to slide easily and effortlessly underneath.
  • the powertrain assembly process comprises the following steps. During the preparation of the supports 4, the flanges 20 are fixed by their pin 38 and their tightening screw 46, the lock washers 50 maintaining the lifting of these flanges.
  • the lock washer 50 fits into the countersink 44, which allows the screwed end of flange 24 which is flat to rest on the upper end of the second boss 40 to ensure a effective tightening of the screw 46.
  • different shapes of cradles 30 can be provided on the support 4 with suitable lengths of flanges 20, making it possible to receive pumps 10 having varied diameters and powers.
  • each housing formed by the cradle 30 with its pre-assembled flange 20 constitutes a guide allowing only the correct pump 10 to be received, which avoids any error and guarantees the quality and speed of assembly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention relates to a motor vehicle propulsion unit comprising an electric traction machine (2) equipped with a holder (4) for at least one electric pump (10) for the circulation of a cooling fluid of this unit, and comprising, for each pump (10), an attachment to the holder, the holder (4) comprising, for each pump (10), a cradle that receives the body of this pump, each cradle comprising an elongate flange (20) having, at one end (22), a pivot pin secured to one side of the cradle, and, at the other end (24), a clamping screw secured in a drilled hole in the other side of the cradle, this screw having, between the cradle and the flange (20), a locking washer which clamps the screw thread thereof.

Description

DESCRIPTION DESCRIPTION
TITRE : GROUPE MOTOPROPULSEUR DE VEHICULE AUTOMOBILE AVEC MACHINE DE TRACTION EQUIPEE DE POMPES ELECTRIQUES TITLE: MOTOR VEHICLE POWERTRAIN WITH TRACTION MACHINE EQUIPPED WITH ELECTRIC PUMPS
[001] La présente invention revendique la priorité de la demande française N°2208964 déposée le 08.09.2022 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. [001] The present invention claims the priority of French application No. 2208964 filed on 08.09.2022, the content of which (text, drawings and claims) is here incorporated by reference.
[002] La présente invention concerne un groupe motopropulseur de véhicule automobile comportant une machine électrique de traction équipée d’un support recevant au moins une pompe électrique, ainsi qu’un procédé de montage de ce groupe et un véhicule automobile électrique comprenant ce groupe. [002] The present invention relates to a motor vehicle powertrain comprising an electric traction machine equipped with a support receiving at least one electric pump, as well as a method of assembling this group and an electric motor vehicle comprising this group.
[003] Les véhicules électriques comportent généralement un circuit de fluide d’échange thermique qui prélève des calories sur la machine de traction et l’électronique de puissance pour réguler leur température afin d’optimiser leur fonctionnement. Le circuit de fluide de refroidissement peut comporter d’autres composants comme un échangeur thermique de refroidissement du fluide pour dissiper des calories vers l’extérieur, un échangeur thermique de chauffage l’habitacle ou un système de réchauffage du fluide. [003] Electric vehicles generally include a heat exchange fluid circuit which draws calories from the traction machine and the power electronics to regulate their temperature in order to optimize their operation. The cooling fluid circuit may include other components such as a heat exchanger for cooling the fluid to dissipate calories to the outside, a heat exchanger for heating the passenger compartment or a system for heating the fluid.
[004] Certains véhicules comportent des pompes électriques de circulation du fluide montées sur un support fixé sur le côté de la machine électrique, ce qui permet de réaliser des canalisations entre ces composants qui sont courtes, et de proposer un ensemble compact plus facile à loger dans le compartiment moteur. [004] Certain vehicles include electric fluid circulation pumps mounted on a support fixed to the side of the electric machine, which makes it possible to produce short pipes between these components, and to offer a compact assembly that is easier to accommodate. in the engine compartment.
[005] Un type d’ensemble connu comprenant deux pompes, présenté notamment par le document EP-A1 -3248821 , comporte pour chaque pompe une plaque épaisse fixée sur une tôle disposée sur le côté de la machine électrique, recevant le corps de cette pompe qui est inséré dans un perçage de cette plaque avec un serrage assurant le maintien. [005] A type of known assembly comprising two pumps, presented in particular by document EP-A1 -3248821, comprises for each pump a thick plate fixed on a sheet metal placed on the side of the electric machine, receiving the body of this pump which is inserted into a hole in this plate with tightening ensuring maintenance.
[006] Les plaques comportent sur un côté des formes complémentaires qui permettent un emboîtement afin de les lier entre elles pour solidariser les deux pompes. L’ensemble des deux plaques est fixé sur un support lié à la machine électrique par des pattes traversant ces plaques. [006] The plates have complementary shapes on one side which allow interlocking in order to link them together to secure the two pumps. All of the two plates are fixed on a support linked to the electric machine by tabs passing through these plates.
[007] Toutefois ce système de fixation de chaque pompe dans sa plaque peut être délicat à mettre en œuvre, avec un effort d’insertion relativement important pour ajuster la pompe dans le perçage de sa plaque afin d’obtenir un serrage assurant un maintien suffisant des pompes dans leur support. [007] However, this system of fixing each pump in its plate can be difficult to implement, with a relatively significant insertion effort for adjust the pump in the hole in its plate in order to obtain a tightening ensuring sufficient maintenance of the pumps in their support.
[008] En particulier il faut d’abord réaliser une orientation de la pompe pour l’aligner sur le logement de la plaque, puis appliquer une force axiale pour l’emmancher dans ce logement. Le système pose des problèmes d’assemblage avec l’effort à développer et le temps d’intervention pour ce montage. [008] In particular, it is first necessary to orient the pump to align it with the housing of the plate, then apply an axial force to fit it into this housing. The system poses assembly problems with the effort required and the intervention time for this assembly.
[009] La présente invention a notamment pour but d’éviter ces problèmes de l’art antérieur. [009] The present invention aims in particular to avoid these problems of the prior art.
[0010] Elle propose à cet effet un groupe motopropulseur de véhicule automobile comportant une machine électrique de traction équipée d’un support d’au moins une pompe électrique de circulation d’un fluide de refroidissement de ce groupe, et comportant pour chaque pompe une fixation sur le support, ce groupe étant remarquable en ce que le support comporte pour chaque pompe un berceau recevant le corps de cette pompe, et en ce que chaque berceau comporte une bride allongée présentant à une extrémité un pivot fixé d’un côté du berceau, et à l’autre extrémité une vis de serrage fixée dans un perçage de l’autre côté du berceau, cette vis disposant entre le berceau et la bride d’une rondelle d’arrêt qui serre son filetage. [0011] Un avantage de ce groupe motopropulseur est qu’on peut préparer à l’avance le support avec chaque bride fixée dessus par son pivot, l’autre côté de la bride présentant sa vis légèrement engagée dans le perçage du berceau, étant maintenue soulevée par rapport à ce berceau grâce à la rondelle qui serre son filetage en mettant la bride en appui sous la tête de la vis. [0010] To this end, it proposes a motor vehicle powertrain comprising an electric traction machine equipped with a support for at least one electric pump for circulating a cooling fluid from this group, and comprising for each pump a fixing on the support, this group being remarkable in that the support comprises for each pump a cradle receiving the body of this pump, and in that each cradle comprises an elongated flange having at one end a pivot fixed to one side of the cradle , and at the other end a tightening screw fixed in a drilling on the other side of the cradle, this screw having between the cradle and the flange a lock washer which tightens its thread. [0011] An advantage of this power unit is that the support can be prepared in advance with each flange fixed to it by its pivot, the other side of the flange having its screw slightly engaged in the drilling of the cradle, being maintained raised relative to this cradle thanks to the washer which tightens its thread by placing the flange in support under the head of the screw.
[0012]On obtient une vis de serrage maintenue en position, et une bride qui du côté de cette vis est soulevée par rapport au berceau ce qui dégage sous la bride un espace plus grand que le corps de la pompe, permettant de glisser facilement et sans effort la pompe sous cette bride. La pompe et la vis étant positionnées et maintenues, l’opérateur a ensuite les mains libres pour réaliser uniquement l’opération de serrage de la vis qui se fait sans difficulté et de manière rapide. [0013]Le groupe motopropulseur selon l’invention peut comporter de plus une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles. [0014]Avantageusement, le berceau forme un creux présentant sensiblement un demi-cercle recevant la moitié de la pompe. [0012] We obtain a clamping screw held in position, and a flange which on the side of this screw is raised relative to the cradle which frees up a space under the flange larger than the body of the pump, allowing easy sliding and effortlessly the pump under this flange. The pump and the screw being positioned and held, the operator then has his hands free to carry out only the screw tightening operation which is done without difficulty and quickly. [0013]The powertrain according to the invention may also include one or more of the following characteristics, which can be combined with each other. [0014] Advantageously, the cradle forms a hollow having substantially a semi-circle receiving half of the pump.
[0015]Avantageusement, la bride allongée forme sensiblement un demi-cercle couvrant la moitié de la pompe. [0016] Dans ce cas, avantageusement le pivot de la bride comporte un tenon formé sur cette bride qui s’ajuste dans une rainure d’une extrémité du berceau, et une goupille insérée dans un perçage du berceau et un perçage du tenon pour former un montage en chape. [0015] Advantageously, the elongated flange forms substantially a semi-circle covering half of the pump. [0016] In this case, advantageously the pivot of the flange comprises a tenon formed on this flange which fits in a groove of one end of the cradle, and a pin inserted in a bore of the cradle and a bore of the tenon to form a screed assembly.
[0017]Avantageusement, l’extrémité vissée de la bride forme un plat qui s’ajuste sur une extrémité supérieure plate formant un côté du berceau. [0017] Advantageously, the screwed end of the flange forms a flat which fits onto a flat upper end forming one side of the cradle.
[0018]Dans ce cas, avantageusement l’extrémité supérieure plate du côté du berceau comporte un creux formant un lamage recevant la rondelle d’arrêt. [0019]Avantageusement, la rondelle d’arrêt réalisée en matière plastique comporte des dents dans son perçage intérieur qui se serrent sur le filetage de la vis de serrage. [0018]In this case, advantageously the flat upper end on the side of the cradle has a hollow forming a countersink receiving the locking washer. [0019]Advantageously, the lock washer made of plastic material has teeth in its internal bore which tighten on the thread of the tightening screw.
[0020]L’invention a aussi pour objet un procédé d’assemblage d’un groupe motopropulseur comprenant l’une quelconque des caractéristiques précédentes, remarquable en ce qu’il comporte une étape de préparation d’un sous-ensemble comprenant le support, les brides avec les vis de serrage partiellement engagées dans leurs perçages, et pour chaque vis la rondelle d’arrêt qui maintient l’extrémité vissée de la bride soulevée. [0020]The subject of the invention is also a method of assembling a powertrain comprising any one of the preceding characteristics, remarkable in that it comprises a step of preparing a subassembly comprising the support, the flanges with the clamping screws partially engaged in their holes, and for each screw the lock washer which keeps the screwed end of the flange raised.
[0021] Dans ce cas, avantageusement la bride soulevée autour de son pivot forme un angle de soulèvement compris entre 5 et 10 degrés par rapport à sa position de montage complet. [0021] In this case, advantageously the flange raised around its pivot forms a lifting angle of between 5 and 10 degrees relative to its complete assembly position.
[0022]L’invention a de plus pour objet un véhicule automobile électrique comportant un groupe motopropulseur comprenant l’une quelconque des caractéristiques précédentes, remarquable en ce que le support reçoit deux pompes électriques présentant des axes qui sont parallèles. [0022]The invention further relates to an electric motor vehicle comprising a powertrain comprising any one of the preceding characteristics, remarkable in that the support receives two electric pumps having axes which are parallel.
[0023]L’invention sera mieux comprise et d’autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description ci-après donnée à titre d’exemple, en référence aux dessins annexés dans lesquels : [0023]The invention will be better understood and other characteristics and advantages will appear more clearly on reading the description below given by way of example, with reference to the appended drawings in which:
[0024][Fig . 1] est une vue d’une machine électrique d’un groupe motopropulseur selon l’invention avec deux pompes de circulation fixées sur un support ; [0024][Fig. 1] is a view of an electric machine of a powertrain according to the invention with two circulation pumps fixed on a support;
[0025] [Fig. 2] est une vue de détail de ce support avec les brides présentées en vue éclatée ; [0025] [Fig. 2] is a detailed view of this support with the flanges presented in exploded view;
[0026][Fig. 3] est une vue de détail de ce support formant un sous-ensemble avec les brides préparées pour la pose des pompes ; et [0027] [Fig . 4] est une vue de détail d’une rondelle d’arrêt de la vis de serrage de chaque bride. [0026][Fig. 3] is a detailed view of this support forming a subassembly with the flanges prepared for installing the pumps; And [0027] [Fig. 4] is a detailed view of a locking washer of the tightening screw of each flange.
[0028]La figure 1 présente une machine électrique 2 comportant un axe principal A de rotation, recevant sur le côté une plaque formant un support 4 sensiblement carré réalisé par un moulage en alliage d’aluminium, disposant dans chaque angle d’un perçage 6 recevant une vis de fixation sur le carter de cette machine. [0028] Figure 1 shows an electric machine 2 comprising a main axis A of rotation, receiving on the side a plate forming a substantially square support 4 made by a molding of aluminum alloy, having in each corner a drilling 6 receiving a fixing screw on the casing of this machine.
[0029]Le support 4 comporte deux berceaux formant des creux disposés parallèlement en partie supérieure et en partie inférieure du support, recevant chacun une pompe électrique 10 présentant un corps sensiblement cylindrique disposé suivant l’axe de rotation de son rotor A1 qui est parallèle à l’axe principal de la machine A. [0029]The support 4 comprises two cradles forming recesses arranged parallel in the upper part and in the lower part of the support, each receiving an electric pump 10 having a substantially cylindrical body arranged along the axis of rotation of its rotor A1 which is parallel to the main axis of the machine A.
[0030]Chaque pompe comporte une entrée de fluide axial 12 et une sortie tangentielle 14 pour activer la circulation du fluide suivant deux niveaux de température, afin de réguler la température de la machine électrique 2 avec son électronique de puissance, et pour assurer le chauffage de l’habitacle. [0030]Each pump has an axial fluid inlet 12 and a tangential outlet 14 to activate the circulation of the fluid according to two temperature levels, in order to regulate the temperature of the electrical machine 2 with its power electronics, and to ensure heating of the passenger compartment.
[0031]Chaque pompe 10 est maintenue dans son logement du support 4 par une bride allongée 20 disposée perpendiculairement à son axe de rotation, recouvrant le corps de la pompe suivant sensiblement un demi-tour. Chaque bride 20 comporte une extrémité pivotante 22 suivant un axe parallèle à l’axe de rotation, et une autre extrémité vissée 24 maintenue par une vis de serrage. Les extrémités pivotantes 22 des deux brides 20 sont en opposition sur le support 4, disposées en haut et en bas de ce support. [0031]Each pump 10 is held in its housing of the support 4 by an elongated flange 20 arranged perpendicular to its axis of rotation, covering the body of the pump following approximately a half-turn. Each flange 20 has a pivoting end 22 along an axis parallel to the axis of rotation, and another screwed end 24 held by a tightening screw. The pivoting ends 22 of the two flanges 20 are in opposition on the support 4, arranged at the top and bottom of this support.
[0032] Les figures 2 et 3 présentent les deux berceaux 30 formant chacun un arc de cercle recevant sensiblement la moitié du corps cylindrique de la pompe, disposant d’un côté d’un premier bossage 32 recevant l’extrémité pivotante de la bride 22, et de l’autre côté d’un deuxième bossage 40 recevant l’extrémité vissée de cette bride 24. [0033]Le premier bossage 32 comporte une rainure centrale disposée suivant l’axe de la bride 20, recevant un tenon formé sur l’extrémité pivotante de cette bride 22. Une goupille 38 traverse un perçage du bossage 34 et un perçage du tenon 36 pour réaliser un montage en chape pivotant. [0032] Figures 2 and 3 show the two cradles 30 each forming an arc of a circle receiving substantially half of the cylindrical body of the pump, having on one side a first boss 32 receiving the pivoting end of the flange 22 , and on the other side of a second boss 40 receiving the screwed end of this flange 24. [0033]The first boss 32 has a central groove arranged along the axis of the flange 20, receiving a tenon formed on the the pivoting end of this flange 22. A pin 38 passes through a bore in the boss 34 and a bore in the tenon 36 to produce a pivoting yoke assembly.
[0034] Le deuxième bossage 40 présente un dessus formant un plan passant par l’axe de la pompe A1 , comportant un perçage taraudé 42 et un lamage de faible épaisseur entourant ce perçage 44. L’extrémité vissée de la bride 24 forme un plat qui s’ajuste sur le dessus du deuxième bossage 40, présentant un perçage recevant une vis de serrage 46 s’ajustant dans le perçage taraudé 42. The second boss 40 has a top forming a plane passing through the axis of the pump A1, comprising a threaded bore 42 and a thin countersink surrounding this bore 44. The screwed end of the flange 24 forms a flat which fits on top of the second boss 40, having a bore receiving a clamping screw 46 fitting into the tapped bore 42.
[0035]Avantageusement chaque bride 20 est formée par un moulage d’une matière plastique, permettant de réaliser en une unique opération de moulage toutes les formes comportant le perçage de la goupille 36 et le perçage de la vis de serrage 46. [0036]La figure 4 présente une rondelle d’arrêt 50 réalisé par un moulage en matière plastique, comportant sur son perçage intérieur trois dents 52 réparties régulièrement, avec un diamètre intérieur légèrement inférieur au diamètre de la vis de serrage 46 afin de réaliser par déformation plastique de cette rondelle un freinage en rotation et un blocage axial sur le filetage de cette vis. [0035]Advantageously each flange 20 is formed by molding a plastic material, making it possible to produce in a single molding operation all the shapes comprising the drilling of the pin 36 and the drilling of the clamping screw 46. [0036] Figure 4 shows a stop washer 50 produced by molding in plastic material, comprising on its internal bore three teeth 52 distributed regularly, with an internal diameter slightly less than the diameter of the tightening screw 46 in order to produce by plastic deformation of This washer provides rotational braking and axial locking on the thread of this screw.
[0037] L’épaisseur de la rondelle d’arrêt 50 correspond à la profondeur du lamage 44 formé sur le dessus du deuxième bossage 40. [0037] The thickness of the lock washer 50 corresponds to the depth of the counterbore 44 formed on the top of the second boss 40.
La figure 3 présente la préparation du support 4 avec chaque bride 20 fixée d’un côté à ce support par la goupille 38, et de l’autre côté la vis de serrage 46 engagée dans le perçage de la bride, cette vis étant serrée partiellement dans le perçage taraudé 42. Figure 3 shows the preparation of the support 4 with each flange 20 fixed on one side to this support by the pin 38, and on the other side the tightening screw 46 engaged in the drilling of the flange, this screw being partially tightened in the tapped hole 42.
[0038]La rondelle d’arrêt 50 est engagée complètement sur la vis de blocage 46, de manière à venir en dessous de l’extrémité vissée de la bride 24 afin de bloquer cette extrémité en appui sous la tête de la vis. On obtient un soulèvement de la bride 20, maintenue par la rondelle d’arrêt 50, son extrémité vissée 24 formant un angle a par rapport au plan supérieur du deuxième bossage 40. [0038]The lock washer 50 is completely engaged on the locking screw 46, so as to come below the screwed end of the flange 24 in order to block this end resting under the head of the screw. We obtain a lifting of the flange 20, held by the lock washer 50, its screwed end 24 forming an angle a relative to the upper plane of the second boss 40.
[0039]Avantageusement on réalise un pré-assemblage d’un sous-ensemble avec un soulèvement de la bride 20 formant un angle a compris entre 5 et 10 degrés, en particulier égal à 7 degrés, ce qui donne un soulèvement d’environ 10mm constituant un logement permettant de glisser facilement et sans effort en dessous le corps de la pompe 10. [0039]Advantageously, a sub-assembly is pre-assembled with a lifting of the flange 20 forming an angle a of between 5 and 10 degrees, in particular equal to 7 degrees, which gives a lifting of approximately 10 mm constituting a housing allowing the body of the pump 10 to slide easily and effortlessly underneath.
[0040] Le procédé de montage du groupe motopropulseur comporte les étapes suivantes. Lors de la préparation des supports 4, les brides 20 sont fixées par leur goupille 38 et leur vis de serrage 46, les rondelles d’arrêt 50 maintenant le soulèvement de ces brides. The powertrain assembly process comprises the following steps. During the preparation of the supports 4, the flanges 20 are fixed by their pin 38 and their tightening screw 46, the lock washers 50 maintaining the lifting of these flanges.
[0041]Lors de l’assemblage des équipements sur la machine électrique 2, l’opérateur peut de manière simple et rapide, sans outillage, glisser sous chaque bride 20 une pompe 10 qui s’ajuste sur le berceau 30, la bride laissant le jeu nécessaire pour cette insertion. L’opérateur n’a ensuite qu’à visser la vis de serrage 46 qui est déjà en position et engagée partiellement dans son perçage 42, ce qu’il fait facilement en ne manipulant seulement qu’une visseuse. [0041] When assembling the equipment on the electric machine 2, the operator can simply and quickly, without tools, slide under each flange 20 a pump 10 which fits on the cradle 30, the flange leaving the clearance required for this insertion. The operator then only has to screw in the clamping screw 46 which is already in position and partially engaged in its drilling 42, which it does easily by only handling a screwdriver.
[0042]En fin de vissage la rondelle d’arrêt 50 s’ajuste dans le lamage 44, ce qui permet à l’extrémité vissée de bride 24 qui est plate de se poser sur l’extrémité supérieure du deuxième bossage 40 pour assurer un serrage efficace de la vis 46. [0043]0n notera qu’on peut prévoir sur le support 4 des formes de berceaux 30 différentes avec des longueurs de brides 20 adaptées, permettant de recevoir des pompes 10 présentant des diamètres et des puissances variées. Dans ce cas chaque logement formé par le berceau 30 avec sa bride préassemblée 20 constitue un guide permettant de recevoir seulement la bonne pompe 10, ce qui évite toute erreur et garantit la qualité et la rapidité du montage. [0042]At the end of screwing, the lock washer 50 fits into the countersink 44, which allows the screwed end of flange 24 which is flat to rest on the upper end of the second boss 40 to ensure a effective tightening of the screw 46. [0043]0 It will be noted that different shapes of cradles 30 can be provided on the support 4 with suitable lengths of flanges 20, making it possible to receive pumps 10 having varied diameters and powers. In this case each housing formed by the cradle 30 with its pre-assembled flange 20 constitutes a guide allowing only the correct pump 10 to be received, which avoids any error and guarantees the quality and speed of assembly.

Claims

REVENDICATIONS
1. Groupe motopropulseur de véhicule automobile comportant une machine électrique de traction (2) équipée d’un support (4) d’au moins une pompe électrique (10) de circulation d’un fluide de refroidissement de ce groupe, et comportant pour chaque pompe (10) une fixation sur le support, caractérisé en ce que le support (4) comporte pour chaque pompe (10) un berceau (30) recevant le corps de cette pompe, et en ce que chaque berceau (30) comporte une bride allongée (20) présentant à une extrémité (22) un pivot fixé d’un côté du berceau (32), et à l’autre extrémité (24) une vis de serrage (46) fixée dans un perçage (42) de l’autre côté du berceau (40), cette vis (46) disposant entre le berceau (30) et la bride (20) d’une rondelle d’arrêt (50) qui serre son filetage. 1. Powertrain of a motor vehicle comprising an electric traction machine (2) equipped with a support (4) of at least one electric pump (10) for circulating a cooling fluid from this group, and comprising for each pump (10) a fixing on the support, characterized in that the support (4) comprises for each pump (10) a cradle (30) receiving the body of this pump, and in that each cradle (30) comprises a flange elongated (20) having at one end (22) a pivot fixed to one side of the cradle (32), and at the other end (24) a tightening screw (46) fixed in a bore (42) of the other side of the cradle (40), this screw (46) having between the cradle (30) and the flange (20) a lock washer (50) which tightens its thread.
2. Groupe motopropulseur selon la revendication 1 , caractérisé en ce que le berceau (30) forme un creux présentant sensiblement un demi-cercle recevant la moitié de la pompe (10). 2. Powertrain according to claim 1, characterized in that the cradle (30) forms a hollow having substantially a semi-circle receiving half of the pump (10).
3. Groupe motopropulseur selon la revendication 1 ou 2, caractérisé en ce que la bride allongée (20) forme sensiblement un demi-cercle couvrant la moitié de la pompe (10). 3. Powertrain according to claim 1 or 2, characterized in that the elongated flange (20) substantially forms a semi-circle covering half of the pump (10).
4. Groupe motopropulseur selon la revendication 3, caractérisé en ce que le pivot de la bride (20) comporte un tenon formé sur cette bride (20) qui s’ajuste dans une rainure d’une extrémité du berceau (32), et une goupille (38) insérée dans un perçage du berceau (34) et un perçage du tenon (36) pour former un montage en chape. 4. Powertrain according to claim 3, characterized in that the pivot of the flange (20) comprises a tenon formed on this flange (20) which fits in a groove of one end of the cradle (32), and a pin (38) inserted into a hole in the cradle (34) and a hole in the tenon (36) to form a clevis assembly.
5. Groupe motopropulseur selon l’une quelconque des revendications précédentes, caractérisé en ce que l’extrémité vissée de la bride (34) forme un plat qui s’ajuste sur une extrémité supérieure plate formant un côté du berceau (30). 5. Powertrain according to any one of the preceding claims, characterized in that the screwed end of the flange (34) forms a flat which fits on a flat upper end forming one side of the cradle (30).
6. Groupe motopropulseur selon la revendication 5, caractérisé en ce que l’extrémité supérieure plate du côté du berceau (30) comporte un creux formant un lamage (44) recevant la rondelle d’arrêt (50). 6. Powertrain according to claim 5, characterized in that the flat upper end on the side of the cradle (30) has a hollow forming a countersink (44) receiving the lock washer (50).
7. Groupe motopropulseur selon l’une quelconque des revendications précédentes, caractérisé en ce que la rondelle d’arrêt (50) réalisée en matière plastique comporte des dents (52) dans son perçage intérieur qui se serrent sur le filetage de la vis de serrage (46). 7. Powertrain according to any one of the preceding claims, characterized in that the lock washer (50) made of plastic material has teeth (52) in its internal bore which tighten on the thread of the clamping screw (46).
8. Procédé d’assemblage d’un groupe motopropulseur selon l’une quelconque des revendications précédentes, caractérisé en ce qu’il comporte une étape de préparation d’un sous-ensemble comprenant le support (4), les brides (20) avec les vis de serrage (46) partiellement engagées dans leurs perçages (42), et pour chaque vis (46) la rondelle d’arrêt (50) qui maintient l’extrémité vissée de la bride (24) soulevée. 8. Method of assembling a powertrain according to any one of the preceding claims, characterized in that it comprises a step of preparing a subassembly comprising the support (4), the flanges (20) with the clamping screws (46) partially engaged in their holes (42), and for each screw (46) the lock washer (50) which keeps the screwed end of the flange (24) raised.
9. Procédé d’assemblage selon la revendication 8, caractérisé en ce que la bride soulevée autour de son pivot (20) forme un angle de soulèvement (a) compris entre 5 et 10 degrés par rapport à sa position de montage complet. 9. Assembly method according to claim 8, characterized in that the flange raised around its pivot (20) forms a lifting angle (a) of between 5 and 10 degrees relative to its complete assembly position.
10. Véhicule automobile électrique comportant un groupe motopropulseur selon l’une quelconque des revendications 1 à 7, caractérisé en ce que le support (2) reçoit deux pompes électriques (10) présentant des axes (A1 ) qui sont parallèles. 10. Electric motor vehicle comprising a powertrain according to any one of claims 1 to 7, characterized in that the support (2) receives two electric pumps (10) having axes (A1) which are parallel.
PCT/FR2023/051111 2022-09-08 2023-07-19 Motor vehicle propulsion unit having a traction machine equipped with electric pumps WO2024052606A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2208964A FR3139509A1 (en) 2022-09-08 2022-09-08 MOTOR VEHICLE POWERTRAIN WITH TRACTION MACHINE EQUIPPED WITH ELECTRIC PUMPS
FRFR2208964 2022-09-08

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WO2024052606A1 true WO2024052606A1 (en) 2024-03-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208964A1 (en) 1972-12-01 1974-06-28 Dynamit Nobel Ag
EP3248821A1 (en) 2016-05-27 2017-11-29 Robert Bosch GmbH Device for controlling at least one fluid flow in a vehicle
WO2019145575A1 (en) * 2018-01-29 2019-08-01 Woco Industrietechnik Gmbh Device for managing fluids, and method for the production thereof
WO2020136000A1 (en) * 2018-12-27 2020-07-02 Renault S.A.S Method for mounting a water pump on a motor vehicle and/or on a powertrain
WO2021038144A1 (en) * 2019-08-29 2021-03-04 Psa Automobiles Sa Attachment of a cooling circuit solenoid valve on a water pump support

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208964A1 (en) 1972-12-01 1974-06-28 Dynamit Nobel Ag
EP3248821A1 (en) 2016-05-27 2017-11-29 Robert Bosch GmbH Device for controlling at least one fluid flow in a vehicle
WO2019145575A1 (en) * 2018-01-29 2019-08-01 Woco Industrietechnik Gmbh Device for managing fluids, and method for the production thereof
WO2020136000A1 (en) * 2018-12-27 2020-07-02 Renault S.A.S Method for mounting a water pump on a motor vehicle and/or on a powertrain
WO2021038144A1 (en) * 2019-08-29 2021-03-04 Psa Automobiles Sa Attachment of a cooling circuit solenoid valve on a water pump support

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