EP2576259A1 - Assembly for a motor vehicle, including a rear chassis carrying a power train - Google Patents

Assembly for a motor vehicle, including a rear chassis carrying a power train

Info

Publication number
EP2576259A1
EP2576259A1 EP11727263.3A EP11727263A EP2576259A1 EP 2576259 A1 EP2576259 A1 EP 2576259A1 EP 11727263 A EP11727263 A EP 11727263A EP 2576259 A1 EP2576259 A1 EP 2576259A1
Authority
EP
European Patent Office
Prior art keywords
assembly
motor vehicle
rear axle
powertrain
chassis
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.)
Withdrawn
Application number
EP11727263.3A
Other languages
German (de)
French (fr)
Inventor
Laurent Gauthier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2576259A1 publication Critical patent/EP2576259A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G9/00—Resilient suspensions of a rigid axle or axle housing for two or more wheels
    • B60G9/02—Resilient suspensions of a rigid axle or axle housing for two or more wheels the axle or housing being pivotally mounted on the vehicle, e.g. the pivotal axis being parallel to the longitudinal axis of the vehicle
    • B60G9/022—Resilient suspensions of a rigid axle or axle housing for two or more wheels the axle or housing being pivotally mounted on the vehicle, e.g. the pivotal axis being parallel to the longitudinal axis of the vehicle the axle having an imaginary pivotal point
    • B60G9/025—Resilient suspensions of a rigid axle or axle housing for two or more wheels the axle or housing being pivotally mounted on the vehicle, e.g. the pivotal axis being parallel to the longitudinal axis of the vehicle the axle having an imaginary pivotal point using linkages for the suspension of the axle allowing its lateral swinging displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/30—Rigid axle suspensions
    • B60G2200/34—Stabilising mechanisms, e.g. for lateral stability
    • B60G2200/341—Panhard rod
    • 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

Definitions

  • the present invention relates to an assembly for a motor vehicle, comprising a rear axle and a powertrain comprising an electric machine driving the rear axle, it also relates to a method of mounting this assembly on the vehicle, and a motor vehicle equipped with such a set.
  • a known type of hybrid or electric vehicle comprises a powertrain comprising an electric traction machine, installed on the rear axle and driving the rear wheels by two shafts arranged substantially along the axes of these wheels.
  • the electric traction chain comprises successively the electric machine which drives a speed reducer, a differential transmitting the movement by distributing it to the two wheel shafts, for motorizing the rear wheels.
  • the powertrain is supported by a rear tubular frame which is itself fixed under the vehicle body, above the rear axle. It is thus possible for the mounting of the vehicle, beforehand constitute an assembly comprising the rear frame, the electric powertrain and the rear train assembled, which is then fixed under the vehicle body.
  • some vehicles have a rear axle support supporting the rear wheels, which is connected to the body of the vehicle and guided laterally by a bar disposed transversely and covering a major part of the width of the vehicle, commonly called panhard bar.
  • the transverse bar comprising at each end a connecting joint, allows a vertical movement of the cross of the rear axle for the work of the suspensions, while guiding the cross laterally by blocking movements in this direction.
  • the transverse bar and takes the transverse forces generated especially in turns, which can be important, which are transmitted by the connecting joints.
  • the present invention is intended to avoid these disadvantages of the prior art.
  • a set for a motor vehicle comprising a chassis supporting a powertrain comprising an electric traction machine, and a rear axle powered by this powertrain, comprising a cross member connecting the rear wheels, this assembly being provided for to be fixed under the body of the vehicle, characterized in that it further comprises a transverse bar comprising at each end a linkage joint, these joints being connected directly to one side to the chassis of the powertrain, and the other side to the transom of the rear axle or to an element attached to it.
  • An advantage of the assembly according to the invention is that it allows to assemble beforehand the frame supporting the powertrain, and the rear axle, and to fix easily between these two elements the transverse bar, to then be able to go up. a single operation this complete set under the vehicle body, which avoids an additional operation under the vehicle, mounting the crossbar.
  • the assembly according to the invention may further comprise one or more of the following features, which may be combined with one another.
  • the frame comprises a tube forming an open loop disposed in a substantially horizontal plane, and surrounding the powertrain which is housed inside this loop.
  • one end of the transverse bar is directly connected to a rear part of the chassis loop.
  • the ends of the cross member of the rear axle receive on each side fixedly a lateral suspension arm whose front portion is connected by a pivot to the vehicle body.
  • the transverse bar comprises a main rod receiving at each end a connecting tube arranged perpendicularly, comprising along its axis a clamping screw to form the connecting joint.
  • the clamping screw can be screwed into a nut attached to the rear axle or chassis.
  • the connecting joints comprise an elastic connection.
  • the invention also relates to a method of assembling an assembly for a motor vehicle, comprising a chassis supporting a powertrain comprising an electric traction machine, a rear axle powered by this powertrain, and a transverse bar connecting directly the chassis to the rear axle, this method comprising the following steps, the chassis is assembled beforehand with its powertrain, the rear axle and the transverse bar to form the assembly, and then this unit is positioned and fixed under the body of the vehicle. vehicle.
  • the invention further relates to a motor vehicle, comprising at the rear an assembly comprising any one of the preceding features.
  • the motor vehicle may include at the front a main engine of the front axle comprising a heat engine achieving the main engine of the vehicle, and the rear assembly comprising the powertrain, realizing a complementary electric motor.
  • FIG. 1 is a view of an assembly according to the invention, completely assembled
  • FIG. 2 is a detail view for this assembly, the connecting joint of the crossbar on the frame;
  • FIG. 3 and 4 are detailed views of the connecting joint of the crossbar on the rear axle.
  • Figure 1 shows a pre-assembled assembly 1, comprising a power unit 2 housed inside a frame 6 made of tube, and a rear axle 20, and a transverse bar 32 connecting these two elements.
  • the tube of the frame 2 forms an open loop having the general shape of a "U” open towards the front of the vehicle marked by an arrow denoted "AV", which is arranged in a substantially horizontal plane.
  • the rear portion of the frame 6 has a substantially straight length, which is arranged transversely.
  • the frame 2 comprises holes 8, which receive fastening screws which are screwed under the body of the vehicle, not shown, in order to rigidly fasten the frame to this box.
  • the rear axle 20 comprises a cross member 22 having a substantially constant section, which connects two suspension arms 24 fixed by their rear parts, at each end of this crossbar.
  • the suspension arms 24 arranged longitudinally, are each connected at their front end to the vehicle body by a pivot comprising a substantially transverse axis.
  • the rear wheels 26 of the vehicle are fixed in the rear part of the suspension arms 24, the axis of these wheels being close to the crossmember 22 of the rear axle 20.
  • the entire rear axle 20 can thus debate around the front pivots of the suspension arms 24, to allow the suspension to work which comprises on each side of the vehicle, a coil spring 28 supporting the vehicle body, and a damper 30.
  • a transverse bar 32 is in a plane perpendicular to the longitudinal axis of the vehicle, located behind the rear axle 20 and the frame 6, it is slightly inclined relative to a horizontal plane.
  • the transverse bar 32 is directly connected at its ends, from the right side of the vehicle to the rear part of the chassis 6, by an upper articulation 34, and from the left side of the vehicle to a suspension arm 24, close to its junction with the 22 crosses, by a lower hinge 36.
  • a substantially rigid transverse connection is thus obtained between the rear axle 20 and the chassis 6, itself rigidly connected to the vehicle body.
  • the rear axle 20 can oscillate vertically freely, by displacing the transverse bar 32 which pivots around its articulations 34, 36.
  • the assembly comprising the chassis 6 already equipped with the powertrain 2, the rear axle 20 as well as the transverse bar 32 connecting these two elements, can be assembled beforehand to be then in the same operation, placed in position under the vehicle, then set under the the body of this vehicle.
  • the assembly personnel thus has only one operation to perform to fix this assembly under the vehicle, with the arms held in the air, the transverse bar 32 being put in place at the same time which limits the operations carried out in a little ergonomic position.
  • FIG. 2 shows the transverse bar 32 comprising a main rod of circular section 40, welded at its upper end, a small connecting tube 42 arranged perpendicularly and comprising, along its axis, a clamping screw 44.
  • the clamping screw 44 is itself screwed into a tapped bore of a vertical tab 46, which is directly welded to the right side on a rear part of the tube forming the loop of the frame 6.
  • An elastic ring inserted into the connecting tube 42, is interposed between the clamping screw 44 and this tube for filtering vibrations.
  • cross bar 32 is fixed on a rigid element constituted by the frame 6, which does not require reinforcement to make this connection, whereas a connection directly to the vehicle body with generally thin sheets, may require reinforcements.
  • FIGS. 3 and 4 show the lower end of the circular section rod 40 of the transverse bar 32, also receiving by welding a small connecting tube 42 arranged perpendicularly, comprising, along its axis, a clamping screw 44.
  • the clamping screw 44 is itself screwed into an add-on nut 60 which is welded into a recess in the rear part of the suspension arm 24.
  • the clamping screw 44 is surrounded by a metal spacer 56 axially clamped by this screw. the spacer being itself surrounded by an elastic ring 58 which forms by adhesion with the connecting tube 42, a flexible connection between the suspension arm 24 and the transverse bar 32.
  • the suspension arm 24 could include a threaded bore instead of the welded nut 60 receiving the clamping screw 44, which reduces the number of components. This principle of tightening the screw 44 on an attached nut 60, can be used in the same way for fixing the upper end of the transverse bar 32 on the frame 6.
  • the powertrain 2 may be the sole motorization of an electric vehicle having rear-wheel drive, or the complementary engine of a hybrid vehicle, comprising a heat engine arranged at the front and driving the wheels before, constituting the main engine of the vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to an assembly for a motor vehicle, including a chassis (6) carrying a power train (2) comprising an electric traction unit, as well as a rear axle (20) motorised by said power train and comprising a cross-member (22) connecting the rear wheels, said assembly being intended to be attached under the body shell of the vehicle. The invention is characterised in that the assembly also comprises a crossbar (32) including a linking hinge (34, 36) at each end, said hinges being directly connected, on one side, to the chassis (6) of the power train and, on the other side, to the cross-member (22) of the rear axle or to an element attached thereto.

Description

ENSEMBLE POUR VEHICULE AUTOMOBILE, COMPRENANT UN CHASSIS ARRIERE SUPPORTANT UN GROUPE MOTOPROPULSEUR  ASSEMBLY FOR A MOTOR VEHICLE, COMPRISING A REAR CHASSIS SUPPORTING A MOTOR POWERTRAIN
La présente invention concerne un ensemble pour véhicule automobile, comprenant un train arrière et un groupe motopropulseur comportant une machine électrique entraînant ce train arrière, elle concerne aussi un procédé de montage de cet ensemble sur le véhicule, ainsi qu'un véhicule automobile équipé d'un tel ensemble. The present invention relates to an assembly for a motor vehicle, comprising a rear axle and a powertrain comprising an electric machine driving the rear axle, it also relates to a method of mounting this assembly on the vehicle, and a motor vehicle equipped with such a set.
Un type de véhicule hybride ou électrique connu, comporte un groupe motopropulseur comprenant une machine électrique de traction, installé sur le train arrière et entraînant les roues arrière par deux arbres disposés sensiblement suivant les axes de ces roues.  A known type of hybrid or electric vehicle comprises a powertrain comprising an electric traction machine, installed on the rear axle and driving the rear wheels by two shafts arranged substantially along the axes of these wheels.
La chaîne de traction électrique comporte successivement la machine électrique qui entraîne par un réducteur de vitesse, un différentiel transmettant le mouvement en le répartissant vers les deux arbres de roue, pour motoriser les roues arrière.  The electric traction chain comprises successively the electric machine which drives a speed reducer, a differential transmitting the movement by distributing it to the two wheel shafts, for motorizing the rear wheels.
Suivant une disposition connue présentée notamment dans la demande de brevet français enregistrée sous le numéro 0959420, le groupe motopropulseur est supporté par un châssis tubulaire arrière qui est lui- même fixé sous la caisse du véhicule, au dessus du train arrière. On peut ainsi pour le montage du véhicule, constituer au préalable un ensemble comprenant le châssis arrière, le groupe motopropulseur électrique et le train arrière assemblés, qui est ensuit fixé sous la caisse du véhicule.  According to a known provision presented in particular in the French patent application registered under number 0959420, the powertrain is supported by a rear tubular frame which is itself fixed under the vehicle body, above the rear axle. It is thus possible for the mounting of the vehicle, beforehand constitute an assembly comprising the rear frame, the electric powertrain and the rear train assembled, which is then fixed under the vehicle body.
Par ailleurs certains véhicules comportent une traverse de train arrière supportant les roues arrière, qui est reliée à la caisse de ce véhicule et guidée latéralement par une barre disposée transversalement et couvrant une majeure partie de la largeur du véhicule, appelée communément barre Panhard. La barre transversale comprenant à chaque extrémité une articulation de liaison, permet un débattement vertical de la traverse du train arrière pour le travail des suspensions, tout en guidant cette traverse latéralement par un blocage des mouvements dans cette direction. La barre transversale reprend ainsi les efforts transversaux générés notamment dans les virages, pouvant être importants, qui sont transmis par les articulations de liaison. Moreover, some vehicles have a rear axle support supporting the rear wheels, which is connected to the body of the vehicle and guided laterally by a bar disposed transversely and covering a major part of the width of the vehicle, commonly called panhard bar. The transverse bar comprising at each end a connecting joint, allows a vertical movement of the cross of the rear axle for the work of the suspensions, while guiding the cross laterally by blocking movements in this direction. The transverse bar and takes the transverse forces generated especially in turns, which can be important, which are transmitted by the connecting joints.
Dans le cas du véhicule électrique ou hybride pour lequel on réalise au préalable un ensemble comprenant le châssis arrière supportant le groupe motopropulseur électrique, et le train arrière, il faut après avoir monté cet ensemble sous la caisse du véhicule, fixer la barre transversale qui va relier ce train arrière à la caisse du véhicule.  In the case of the electric or hybrid vehicle for which it is previously carried out an assembly comprising the rear frame supporting the electric powertrain, and the rear train, it is necessary after mounting this assembly under the vehicle body, fix the crossbar which will connect this rear axle to the vehicle body.
Cette dernière opération effectuée par un opérateur qui a les bras maintenus en l'air, dans une position peu ergonomique, est délicate et pénible.  This last operation performed by an operator who has his arms held in the air, in an ergonomic position, is difficult and painful.
De plus il faut prévoir sous la caisse du véhicule réalisée généralement en tôle d'épaisseur réduite, un point d'ancrage solide pour l'articulation d'extrémité de la barre transversale. Ce point d'ancrage oblige à fixer des renforts sur la caisse, à cet endroit.  In addition, it is necessary to provide under the vehicle body generally made of sheet metal of reduced thickness, a solid anchor point for the end joint of the crossbar. This anchor point forces to fix reinforcements on the box, at this place.
La présente invention a notamment pour but d'éviter ces inconvénients de la technique antérieure.  The present invention is intended to avoid these disadvantages of the prior art.
Elle propose à cet effet un ensemble pour véhicule automobile, comprenant un châssis supportant un groupe motopropulseur comportant une machine électrique de traction, ainsi qu'un train arrière motorisé par ce groupe motopropulseur, comportant une traverse reliant les roues arrière, cet ensemble étant prévu pour venir se fixer sous la caisse du véhicule, caractérisé en ce qu'il comporte de plus une barre transversale comprenant à chaque extrémité une articulation de liaison, ces articulations étant reliées directement d'un côté au châssis du groupe motopropulseur, et de l'autre côté à la traverse du train arrière ou à un élément qui lui est fixé.  It proposes for this purpose a set for a motor vehicle, comprising a chassis supporting a powertrain comprising an electric traction machine, and a rear axle powered by this powertrain, comprising a cross member connecting the rear wheels, this assembly being provided for to be fixed under the body of the vehicle, characterized in that it further comprises a transverse bar comprising at each end a linkage joint, these joints being connected directly to one side to the chassis of the powertrain, and the other side to the transom of the rear axle or to an element attached to it.
Un avantage de l'ensemble selon l'invention, est qu'il permet d'assembler au préalable le châssis supportant le groupe motopropulseur, et le train arrière, et de fixer aisément entre ces deux éléments la barre transversale, pour pouvoir ensuite monter en une seule opération cet ensemble complet sous la caisse du véhicule, ce qui évite une opération supplémentaire sous le véhicule, de montage de la barre transversale. An advantage of the assembly according to the invention is that it allows to assemble beforehand the frame supporting the powertrain, and the rear axle, and to fix easily between these two elements the transverse bar, to then be able to go up. a single operation this complete set under the vehicle body, which avoids an additional operation under the vehicle, mounting the crossbar.
L'ensemble selon l'invention peut en outre comporter une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles.  The assembly according to the invention may further comprise one or more of the following features, which may be combined with one another.
Selon un mode de réalisation, le châssis comporte un tube formant une boucle ouverte disposée dans un plan sensiblement horizontal, et entourant le groupe motopropulseur qui est logé à l'intérieur de cette boucle.  According to one embodiment, the frame comprises a tube forming an open loop disposed in a substantially horizontal plane, and surrounding the powertrain which is housed inside this loop.
Avantageusement, une extrémité de la barre transversale est directement reliée à une partie arrière de la boucle du châssis.  Advantageously, one end of the transverse bar is directly connected to a rear part of the chassis loop.
Selon un mode de réalisation, les extrémités de la traverse du train arrière, reçoivent de chaque côté de manière fixe un bras de suspension latéral dont la partie avant est reliée par un pivot à la caisse du véhicule.  According to one embodiment, the ends of the cross member of the rear axle, receive on each side fixedly a lateral suspension arm whose front portion is connected by a pivot to the vehicle body.
Avantageusement, la barre transversale comporte une tige principale recevant à chaque extrémité un tube de liaison disposé perpendiculairement, comprenant suivant son axe une vis de serrage pour former l'articulation de liaison.  Advantageously, the transverse bar comprises a main rod receiving at each end a connecting tube arranged perpendicularly, comprising along its axis a clamping screw to form the connecting joint.
La vis de serrage peut être vissée dans un écrou rapporté sur le train arrière ou sur le châssis.  The clamping screw can be screwed into a nut attached to the rear axle or chassis.
Avantageusement, les articulations de liaison comportent une liaison élastique.  Advantageously, the connecting joints comprise an elastic connection.
L'invention a aussi pour objet un procédé d'assemblage d'un ensemble pour un véhicule automobile, comprenant un châssis supportant un groupe motopropulseur comportant une machine électrique de traction, un train arrière motorisé par ce groupe motopropulseur, et une barre transversale reliant directement le châssis au train arrière, ce procédé comportant les étapes suivantes, on assemble entre eux au préalable le châssis avec son groupe motopropulseur, le train arrière et la barre transversale pour former l'ensemble, puis on positionne et fixe cet ensemble sous la caisse du véhicule. L'invention a de plus pour objet un véhicule automobile, comprenant à l'arrière un ensemble comportant l'une quelconque des caractéristiques précédentes. The invention also relates to a method of assembling an assembly for a motor vehicle, comprising a chassis supporting a powertrain comprising an electric traction machine, a rear axle powered by this powertrain, and a transverse bar connecting directly the chassis to the rear axle, this method comprising the following steps, the chassis is assembled beforehand with its powertrain, the rear axle and the transverse bar to form the assembly, and then this unit is positioned and fixed under the body of the vehicle. vehicle. The invention further relates to a motor vehicle, comprising at the rear an assembly comprising any one of the preceding features.
En particulier, le véhicule automobile peut comporter à l'avant une motorisation principale du train avant comprenant un moteur thermique réalisant la motorisation principal de ce véhicule, et à l'arrière l'ensemble comprenant le groupe motopropulseur, réalisant une motorisation électrique complémentaire.  In particular, the motor vehicle may include at the front a main engine of the front axle comprising a heat engine achieving the main engine of the vehicle, and the rear assembly comprising the powertrain, realizing a complementary electric motor.
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 et de manière non limitative, en référence aux dessins annexés dans lesquels :  The invention will be better understood and other features and advantages will appear more clearly on reading the following description given by way of example and in a nonlimiting manner, with reference to the appended drawings in which:
- la figure 1 est une vue d'un ensemble selon l'invention, complètement assemblé ;  - Figure 1 is a view of an assembly according to the invention, completely assembled;
- la figure 2 est une vue de détail pour cet ensemble, de l'articulation de liaison de la barre transversale sur le châssis ; et  - Figure 2 is a detail view for this assembly, the connecting joint of the crossbar on the frame; and
- les figures 3 et 4 sont des vues de détail de l'articulation de liaison de la barre transversale sur le train arrière.  - Figures 3 and 4 are detailed views of the connecting joint of the crossbar on the rear axle.
La figure 1 présente un ensemble pré-assemblé 1 , comportant un groupe motopropulseur 2 logé à l'intérieur d'un châssis 6 réalisé en tube, et un train arrière 20, ainsi qu'une barre transversale 32 reliant ces deux éléments.  Figure 1 shows a pre-assembled assembly 1, comprising a power unit 2 housed inside a frame 6 made of tube, and a rear axle 20, and a transverse bar 32 connecting these two elements.
Le tube du châssis 2 forme une boucle ouverte ayant la forme générale d'un « U » ouvert vers l'avant du véhicule repéré par une flèche notée « AV », qui est disposé dans un plan sensiblement horizontal. La partie arrière du châssis 6 comporte une longueur sensiblement droite, qui est disposée transversalement.  The tube of the frame 2 forms an open loop having the general shape of a "U" open towards the front of the vehicle marked by an arrow denoted "AV", which is arranged in a substantially horizontal plane. The rear portion of the frame 6 has a substantially straight length, which is arranged transversely.
Trois liaisons élastiques 4 fixées sous le châssis 6, supportent le groupe motopropulseur 2 disposé dans la boucle de ce châssis, qui est ainsi suspendu pour filtrer des vibrations. Le châssis 2 comporte des perçages 8, qui reçoivent des vis de fixation venant se visser sous la caisse du véhicule non représentée, pour réaliser une fixation rigide du châssis sur cette caisse. Three elastic links 4 fixed under the frame 6, support the powertrain 2 arranged in the loop of this frame, which is thus suspended to filter vibrations. The frame 2 comprises holes 8, which receive fastening screws which are screwed under the body of the vehicle, not shown, in order to rigidly fasten the frame to this box.
Le train arrière 20 comporte une traverse 22 disposant d'une section sensiblement constante, qui relie deux bras de suspension 24 fixés par leurs parties arrière, à chaque extrémité de cette traverse.  The rear axle 20 comprises a cross member 22 having a substantially constant section, which connects two suspension arms 24 fixed by their rear parts, at each end of this crossbar.
Les bras de suspension 24 disposés longitudinalement, sont reliés chacun au niveau de leur extrémité avant, à la caisse du véhicule par un pivot comprenant un axe sensiblement transversal. Les roues arrière 26 du véhicule sont fixées en partie arrière des bras de suspension 24, l'axe de ces roues étant proche de la traverse 22 du train arrière 20.  The suspension arms 24 arranged longitudinally, are each connected at their front end to the vehicle body by a pivot comprising a substantially transverse axis. The rear wheels 26 of the vehicle are fixed in the rear part of the suspension arms 24, the axis of these wheels being close to the crossmember 22 of the rear axle 20.
L'ensemble du train arrière 20 peut ainsi débattre autour des pivots avant des bras de suspension 24, pour permettre un travail de la suspension qui comprend de chaque côté du véhicule, un ressort hélicoïdal 28 supportant la caisse du véhicule, et un amortisseur 30.  The entire rear axle 20 can thus debate around the front pivots of the suspension arms 24, to allow the suspension to work which comprises on each side of the vehicle, a coil spring 28 supporting the vehicle body, and a damper 30.
Une barre transversale 32 se trouve dans un plan perpendiculaire à l'axe longitudinal du véhicule, situé en arrière du train arrière 20 ainsi que du châssis 6, elle est légèrement inclinée par rapport à un plan horizontal. La barre transversale 32 est directement reliée par ses extrémités, du côté droit du véhicule à la partie arrière du châssis 6, par une articulation supérieure 34, et du côté gauche du véhicule à un bras de suspension 24, à proximité de sa jonction avec la traverse 22, par une articulation inférieure 36.  A transverse bar 32 is in a plane perpendicular to the longitudinal axis of the vehicle, located behind the rear axle 20 and the frame 6, it is slightly inclined relative to a horizontal plane. The transverse bar 32 is directly connected at its ends, from the right side of the vehicle to the rear part of the chassis 6, by an upper articulation 34, and from the left side of the vehicle to a suspension arm 24, close to its junction with the 22 crosses, by a lower hinge 36.
On obtient ainsi une liaison transversale sensiblement rigide entre le train arrière 20 et le châssis 6, lui-même relié de manière rigide à la caisse du véhicule. Lors des débattements de la suspension, le train arrière 20 peut osciller verticalement librement, en déplaçant la barre transversale 32 qui pivote autour de ses articulations 34, 36.  A substantially rigid transverse connection is thus obtained between the rear axle 20 and the chassis 6, itself rigidly connected to the vehicle body. During the movements of the suspension, the rear axle 20 can oscillate vertically freely, by displacing the transverse bar 32 which pivots around its articulations 34, 36.
L'ensemble comprenant le châssis 6 déjà équipé du groupe motopropulseur 2, le train arrière 20 ainsi que de la barre transversale 32 reliant ces deux éléments, peut être assemblé au préalable pour être ensuite en une même opération, mis en position sous le véhicule, puis fixé sous la caisse de ce véhicule. Le personnel de montage n'a ainsi qu'une seule opération à effectuer pour fixer cet ensemble sous le véhicule, avec les bras maintenus en l'air, la barre transversale 32 étant mise en place en même temps ce qui limite les opérations réalisées dans une position peu ergonomique. The assembly comprising the chassis 6 already equipped with the powertrain 2, the rear axle 20 as well as the transverse bar 32 connecting these two elements, can be assembled beforehand to be then in the same operation, placed in position under the vehicle, then set under the the body of this vehicle. The assembly personnel thus has only one operation to perform to fix this assembly under the vehicle, with the arms held in the air, the transverse bar 32 being put in place at the same time which limits the operations carried out in a little ergonomic position.
La figure 2 présente la barre transversale 32 comportant une tige principale de section circulaire 40, recevant par soudure à son extrémité supérieure, un petit tube de liaison 42 disposé perpendiculairement, comprenant suivant son axe une vis de serrage 44.  FIG. 2 shows the transverse bar 32 comprising a main rod of circular section 40, welded at its upper end, a small connecting tube 42 arranged perpendicularly and comprising, along its axis, a clamping screw 44.
La vis de serrage 44 est elle-même vissée dans un perçage taraudé d'une patte 46 verticale, qui est directement soudée du côté droit sur une partie arrière du tube formant la boucle du châssis 6. Une bague élastique insérée dans le tube de liaison 42, s'interpose entre la vis de serrage 44 et ce tube pour filtrer des vibrations.  The clamping screw 44 is itself screwed into a tapped bore of a vertical tab 46, which is directly welded to the right side on a rear part of the tube forming the loop of the frame 6. An elastic ring inserted into the connecting tube 42, is interposed between the clamping screw 44 and this tube for filtering vibrations.
On notera que la barre transversale 32 est fixée sur un élément rigide constitué par le châssis 6, qui ne nécessite pas de renfort pour effectuer cette liaison, alors qu'une liaison directement sur la caisse du véhicule comportant des tôles généralement fines, pourrait nécessiter des renforts.  Note that the cross bar 32 is fixed on a rigid element constituted by the frame 6, which does not require reinforcement to make this connection, whereas a connection directly to the vehicle body with generally thin sheets, may require reinforcements.
Les figures 3 et 4 présentent l'extrémité inférieure de la tige de section circulaire 40 de la barre transversale 32, recevant aussi par soudure un petit tube de liaison 42 disposé perpendiculairement, comprenant suivant son axe une vis de serrage 44.  FIGS. 3 and 4 show the lower end of the circular section rod 40 of the transverse bar 32, also receiving by welding a small connecting tube 42 arranged perpendicularly, comprising, along its axis, a clamping screw 44.
La vis de serrage 44 est elle-même vissée dans un écrou rapporté 60 qui est soudé dans un creux de la partie arrière du bras de suspension 24. La vis de serrage 44 est entourée par une entretoise métallique 56 serrée axialement par cette vis, l'entretoise étant elle-même entourée par une bague élastique 58 qui forme par adhésion avec le tube de liaison 42, une liaison souple entre le bras de suspension 24 et la barre transversale 32.  The clamping screw 44 is itself screwed into an add-on nut 60 which is welded into a recess in the rear part of the suspension arm 24. The clamping screw 44 is surrounded by a metal spacer 56 axially clamped by this screw. the spacer being itself surrounded by an elastic ring 58 which forms by adhesion with the connecting tube 42, a flexible connection between the suspension arm 24 and the transverse bar 32.
En variante, le bras de suspension 24 pourrait comporter un perçage taraudé au lieu de l'écrou soudé 60 recevant la vis de serrage 44, ce qui réduit le nombre de composants. Ce principe de serrage de la vis 44 sur un écrou rapporté 60, peut être utilisé de la même manière pour la fixation de l'extrémité supérieure de la barre transversale 32 sur le châssis 6. Alternatively, the suspension arm 24 could include a threaded bore instead of the welded nut 60 receiving the clamping screw 44, which reduces the number of components. This principle of tightening the screw 44 on an attached nut 60, can be used in the same way for fixing the upper end of the transverse bar 32 on the frame 6.
D'une manière générale, le groupe motopropulseur 2 peut être l'unique motorisation d'un véhicule électrique comportant des roues arrière motrices, ou la motorisation complémentaire d'un véhicule hybride, comprenant un moteur thermique disposé à l'avant et entraînant les roues avant, constituant la motorisation principale du véhicule.  In general, the powertrain 2 may be the sole motorization of an electric vehicle having rear-wheel drive, or the complementary engine of a hybrid vehicle, comprising a heat engine arranged at the front and driving the wheels before, constituting the main engine of the vehicle.

Claims

REVENDICATIONS
1 - Ensemble pour véhicule automobile, comprenant un châssis (6) supportant un groupe motopropulseur (2) comportant une machine électrique de traction, ainsi qu'un train arrière motorisé (20) par ce groupe motopropulseur comportant une traverse (22) reliant les roues arrière, cet ensemble étant prévu pour venir se fixer sous la caisse du véhicule, caractérisé en ce qu'il comporte de plus une barre transversale (32) comprenant à chaque extrémité une articulation de liaison (34, 36), ces articulations étant reliées directement d'un côté au châssis (6) du groupe motopropulseur, et de l'autre côté à la traverse (22) du train arrière où à un élément qui lui est fixé. 1 - Set for a motor vehicle, comprising a chassis (6) supporting a powertrain (2) comprising an electric traction machine, and a motorized rear axle (20) by this powertrain comprising a cross member (22) connecting the wheels rear, this assembly being provided to be fixed under the body of the vehicle, characterized in that it further comprises a transverse bar (32) comprising at each end a connecting joint (34, 36), these joints being connected directly on one side to the frame (6) of the power train, and on the other side to the cross member (22) of the rear axle or to a member attached thereto.
2 - Ensemble pour véhicule automobile suivant la revendication 1 , caractérisé en ce le châssis (6) comporte un tube formant une boucle ouverte disposée dans un plan sensiblement horizontal, et entourant le groupe motopropulseur (2) qui est logé à l'intérieur de cette boucle.  2 - assembly for a motor vehicle according to claim 1, characterized in that the frame (6) comprises a tube forming an open loop disposed in a substantially horizontal plane, and surrounding the powertrain (2) which is housed inside this loop.
3 - Ensemble pour véhicule automobile suivant la revendication 2, caractérisé en ce qu'une extrémité de la barre transversale (32) est directement reliée à une partie arrière de la boucle du châssis (6).  3 - assembly for a motor vehicle according to claim 2, characterized in that one end of the crossbar (32) is directly connected to a rear portion of the frame loop (6).
4 - Ensemble pour véhicule automobile suivant l'une quelconque des revendications précédentes, caractérisé en ce que les extrémités de la traverse (22) du train arrière (20), reçoivent de chaque côté de manière fixe un bras de suspension latéral (24) dont la partie avant est reliée par un pivot à la caisse du véhicule.  4 - set for a motor vehicle according to any one of the preceding claims, characterized in that the ends of the cross member (22) of the rear axle (20), receive on each side fixedly a lateral suspension arm (24), the front part is connected by a pivot to the vehicle body.
5 - Ensemble pour véhicule automobile suivant l'une quelconque des revendications précédentes, caractérisé en ce que la barre transversale (32) comporte une tige principale (40), recevant à chaque extrémité un tube de liaison (42) disposé perpendiculairement, comprenant suivant son axe une vis de serrage (44) pour former l'articulation de liaison (34, 36). 6 - Ensemble pour véhicule automobile suivant la revendication 5, caractérisé en ce que la vis de serrage (44) est vissée dans un écrou (60) rapporté sur le train arrière (20) ou sur le châssis (6). 5 - assembly for a motor vehicle according to any one of the preceding claims, characterized in that the transverse bar (32) comprises a main rod (40), receiving at each end a connecting tube (42) arranged perpendicularly, comprising according to its axis a clamping screw (44) to form the linkage joint (34, 36). 6 - assembly for a motor vehicle according to claim 5, characterized in that the clamping screw (44) is screwed into a nut (60) attached to the rear axle (20) or on the frame (6).
7 - Ensemble pour véhicule automobile suivant l'une quelconque des revendications précédentes, caractérisé en ce que les articulations de liaison 7 - Set for a motor vehicle according to any one of the preceding claims, characterized in that the connecting joints
(34, 36) comportent une liaison élastique (58). (34, 36) comprise an elastic connection (58).
8 - Procédé d'assemblage d'un ensemble (1 ) pour un véhicule automobile, comprenant un châssis (6) supportant un groupe motopropulseur (2) comportant une machine électrique de traction, un train arrière motorisé (20) par ce groupe motopropulseur, et une barre transversale (32) reliant directement le châssis au train arrière, caractérisé en ce que l'on assemble entre eux au préalable le châssis (6) avec son groupe motopropulseur (2), le train arrière (20) et la barre transversale (32) pour former l'ensemble, puis on positionne et fixe cet ensemble sous la caisse du véhicule.  8 - A method of assembling an assembly (1) for a motor vehicle, comprising a chassis (6) supporting a powertrain (2) comprising an electric traction machine, a motorized rear axle (20) by this powertrain, and a transverse bar (32) directly connecting the chassis to the rear axle, characterized in that the chassis (6) is assembled beforehand with its power unit (2), the rear axle (20) and the transverse bar (32) to form the assembly, then it is positioned and fixed this set under the vehicle body.
9 - Véhicule automobile, caractérisé en ce qu'il comporte à l'arrière un ensemble (1 ) réalisé suivant l'une quelconque des revendications précédentes.  9 - A motor vehicle, characterized in that it comprises at the rear assembly (1) made according to any one of the preceding claims.
10 - Véhicule automobile suivant la revendication 9, caractérisé en ce qu'il comporte à l'avant une motorisation principale du train avant comprenant un moteur thermique réalisant la motorisation principal de ce véhicule, et à l'arrière l'ensemble (1 ) comprenant le groupe motopropulseur (2), réalisant une motorisation électrique complémentaire.  10 - Motor vehicle according to claim 9, characterized in that it comprises at the front a main engine of the front axle comprising a heat engine realizing the main engine of the vehicle, and the rear assembly (1) comprising the powertrain (2), providing a complementary electric motor.
EP11727263.3A 2010-05-27 2011-05-25 Assembly for a motor vehicle, including a rear chassis carrying a power train Withdrawn EP2576259A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1054083A FR2960481B1 (en) 2010-05-27 2010-05-27 ASSEMBLY FOR A MOTOR VEHICLE, COMPRISING A REAR CHASSIS SUPPORTING A MOTOR POWERTRAIN
PCT/FR2011/051184 WO2011148097A1 (en) 2010-05-27 2011-05-25 Assembly for a motor vehicle, including a rear chassis carrying a power train

Publications (1)

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EP2576259A1 true EP2576259A1 (en) 2013-04-10

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EP11727263.3A Withdrawn EP2576259A1 (en) 2010-05-27 2011-05-25 Assembly for a motor vehicle, including a rear chassis carrying a power train

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EP (1) EP2576259A1 (en)
FR (1) FR2960481B1 (en)
WO (1) WO2011148097A1 (en)

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Publication number Priority date Publication date Assignee Title
JP5785586B2 (en) * 2013-05-31 2015-09-30 本田技研工業株式会社 Electric vehicle
US9676411B2 (en) 2014-10-01 2017-06-13 Caterpillar Inc. Electric drive retrofit kit
US10294634B2 (en) 2014-10-01 2019-05-21 Caterpillar Inc. Rear entry electric drive motor module
JP7206173B2 (en) * 2019-09-20 2023-01-17 株式会社クボタ work vehicle

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Publication number Priority date Publication date Assignee Title
FR959420A (en) 1950-03-30
US4057121A (en) * 1976-03-08 1977-11-08 Caterpillar Tractor Co. Modular rear axle suspension and drive arrangement for trucks
AT372342B (en) * 1980-09-30 1983-09-26 Muehlbacher Karl BATTERY-POWERED ELECTRIC VEHICLE
DE102007022283A1 (en) * 2007-05-12 2008-11-13 Volkswagen Ag Rear axle for a motor vehicle

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Title
See references of WO2011148097A1 *

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FR2960481A1 (en) 2011-12-02
WO2011148097A1 (en) 2011-12-01

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