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)
• Body Structure For Vehicles (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43335236

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (4)

• 2010
  • 2010-05-27 FR FR1054083A patent/FR2960481B1/fr not_active Expired - Fee Related
• 2011
  • 2011-05-25 WO PCT/FR2011/051184 patent/WO2011148097A1/fr not_active Ceased
  • 2011-05-25 EP EP11727263.3A patent/EP2576259A1/de not_active Withdrawn

Non-Patent Citations (1)

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