A motor vehicle comprising an electric machine, an air conditioning compressor forming a support for said electric machine

Abstract

A motor vehicle (1) comprising at least one electrical machine (3) extending along a transverse axis (Y) between two longitudinal members (2), said electrical machine (3) comprising a drive shaft integral with a gearbox (6), the motor vehicle further comprising a compressor (10) of an air conditioning system extending along a longitudinal axis (X) perpendicular to the transverse axis (Y). The vehicle includes a support (7) for the electrical machine (3) on the gearbox (6) side, integral with the longitudinal member (2) on the gearbox (6) side. The compressor (10) includes at least two vertical mounting lugs (11) extending vertically from the external cylindrical surface (10a) of the compressor (10) and each configured to cooperate with fasteners (12) for attachment to the support (7) on the gearbox (6) side. Figure for the abbreviation: Fig 2

Description

Title of the invention: Motor vehicle comprising an electric machine, an air conditioning compressor forming a support for said electric machine

[0001] The present invention relates to the field of motor vehicles and in particular the fixing of a compressor in a vehicle comprising at least one electrical machine.

[0002] The compressor is preferably an air conditioning compressor of an air conditioning system.

[0003] The motor vehicle may be a thermally powered thermal and electric vehicle, being a hybrid vehicle, the electric machine ensuring at least partial propulsion of the vehicle. The motor vehicle may also be a vehicle with only electric propulsion.

[0004] Today, the compressors of the air conditioning system of the motor vehicle are fixed on the electric machine, which makes it possible to take advantage of the latter's filtration. The electric machine is then connected to a support crossmember by two suspension pieces, each located at an opposite end of the electric machine.

[0005] The electric machine is also fixed to the vehicle body by a second support on the side of the reducer of said electric machine.

[0006] The size of electric compressors called "e-compressors" no longer allows their integration into engines. Indeed, such compressors require a need for more efficient filtration.

[0007] Furthermore, the second support requires having sufficiently spaced fixing points on the reducer of the electric machine in order to ensure sufficient holding stiffness as well as a good vibration level.

[0008] Fixing an e-compressor on the reducer side of the electric machine causes interference with the second support of the electric machine.

[0009] There is therefore a need to improve the fixing of new air conditioning compressors in a motor vehicle comprising at least one electrical machine.

[0010] An objective of the invention is to propose a fixing for an air conditioning compressor, while reducing the size of the support on the side of the reducer of the electric machine.

[0011] The present invention relates to a motor vehicle comprising at least one electrical machine extending along a transverse axis between two longitudinal side members, said electrical machine comprising a drive shaft secured to a reducer.

[0012] The motor vehicle further comprises a compressor of an air conditioning system extending along a longitudinal axis perpendicular to the transverse axis.

[0013] The vehicle comprises a support for the electric machine on the reducer side secured to the reducer side side member.

[0014] The compressor comprises at least two vertical fixing studs, for example three, extending vertically from the external cylindrical surface of the compressor and each configured to cooperate with screw means, in particular a screw, for fixing to the support on the reducer side.

[0015] The particular fixing interface of the compressor on the support of the electric machine on the reducer side makes it possible to position the air conditioning compressor on the reducer side of said electric machine without degrading the vibration performance of said electric machine while benefiting from the spacing of the fixing lugs of the compressor on the reducer.

[0016] Advantageously, the support of the electric machine on the reducer side comprises a fixing crosspiece extending in the plane comprising the transverse axis and the vertical axis and comprising a distal end secured to the longitudinal member on the reducer side and a proximal end secured to a support plate.

[0017] By "proximal end" is meant an end closer to the electrical machine than the "distal end".

[0018] Preferably, the support plate comprises at least two orifices cooperating with the screw means, for fixing the compressor to the support on the reducer side.

[0019] For example, each vertical fixing stud of the compressor comprises a threaded end intended to cooperate with the screw means, for example a nut.

[0020] The holes in the support plate on the reducer side allow the threaded ends of the vertical fixing studs of the compressor to pass through.

[0021] Alternatively, a structural inversion could be provided in which the vertical fixing studs comprise a thread intended to cooperate with a screw inserted through the corresponding hole in the support plate.

[0022] The support on the reducer side is for example made of metallic material.

[0023] Advantageously, the reducer comprises three transverse fixing lugs extending along the transverse axis towards the side member on the side opposite the electric machine.

[0024] For example, the fixing lugs of the reducer are regularly distributed around the perimeter of said reducer and form an angle of 120° with respect to each other.

[0025] Advantageously, the compressor further comprises at least three transverse fixing studs extending transversely from the body of the compressor and configured each to cooperate with a fixing lug of the reducer for fixing said reducer on the compressor.

[0026] For example, two of the transverse mounting pads of the compressor extend transversely from the outer cylindrical surface of the compressor, preferably the upper surface and the lower surface, and one of the transverse mounting pads extends from a side surface of the compressor.

[0027] Advantageously, each transverse fixing stud of the compressor has a cylindrical shape comprising a bore configured to receive the end of a corresponding fixing lug of the reducer, said fixing lugs of the reducer are made integral with an associated transverse fixing stud of the compressor by means of screw means, for example a screw.

[0028] For example, the electric machine comprises a casing extending along the transverse axis and delimited transversely by a first end on the side opposite the reducer and a second end on the side of the reducer, said first end of the electric machine being fixed on a first support on the side of the suspension of the vehicle.

[0029] Other aims, characteristics and advantages of the invention will appear on reading the following description, given solely by way of non-limiting example, and made with reference to the appended drawings in which:

[0030] [Fig.l] illustrates very schematically a part of the engine compartment of a motor vehicle according to the invention; and

[0031] [Fig.2] a detail view of [Fig.l].

[0032] In the following description, the terms "longitudinal", "transverse", "vertical", "front", "rear", "left" and "right" are defined according to the usual orthogonal reference system for motor vehicles, shown in the drawings, and which includes:

[0033] - a longitudinal axis X, horizontal and oriented from the front to the rear of the vehicle;

[0034] - a transverse axis Y, horizontal, perpendicular to the longitudinal axis X and oriented left to right of the vehicle when the vehicle is moving;

[0035] - a vertical axis Z, orthogonal to the longitudinal and transverse axes X and Y and directed from bottom up.

[0036] Figures 1 and 2 illustrate an example of a front part 1 of an engine compartment M of a motor vehicle. The engine compartment M is closed by a hood (not shown) and is separated from the passenger compartment of the vehicle by a transverse wall or apron (not shown).

[0037] The motor vehicle comprises, in a known manner, a chassis configured to support all of the mechanical components and the bodywork of the vehicle. The chassis comprises two longitudinal side members 2 each extending along the longitudinal axis X and of which only one is visible in figures 1 and 2, and a plurality of transverse cross members arranged between said side members 2.

[0038] The motor vehicle 1 further comprises an electrical machine 3 comprising a casing 3a, here cylindrical, extending along the transverse axis Y and delimited transversely by a first end 3b and a second end 3c.

[0039] The first end 3b of the electric machine 3 is fixed on a first support 4, on the side of the suspension 5 of the vehicle 1.

[0040] The second end 3c of the electric machine 3, from which extends a drive shaft (not visible in the figures) connected to a reducer 6 comprising transverse fixing lugs 6a, here three in number, extending along the transverse axis Y towards the side member 2, on the side opposite the electric machine 3.

[0041] The fixing lugs 6a are regularly distributed around the circumference of the reducer 6 and form an angle of 120° with respect to each other.

[0042] The motor vehicle further comprises a compressor 10 of an air conditioning system (not shown) of the motor vehicle.

[0043] The compressor 10 comprises a substantially cylindrical body 10a extending along the longitudinal axis X, perpendicular to the electrical machine 3.

[0044] The compressor 10 comprises vertical fixing studs 11, here three in number, extending vertically from the external cylindrical surface 10a of the compressor.

[0045] Alternatively, at least two vertical fixing studs 11 could be provided.

[0046] Each vertical fixing stud 11 comprises a threaded end (not visible on the figures) intended to cooperate with a screw means 12.

[0047] The compressor 10 further comprises transverse fixing studs 13, here three in number, two of which extend transversely from the external cylindrical surface 10a of the compressor, here the upper surface and the lower surface and a transverse fixing stud 13 extends from a lateral surface 10b.

[0048] Each transverse fixing stud 13 has a cylindrical shape comprising a bore configured to receive the end of a corresponding fixing lug 6a of the reducer 6. A fixing lug 6a of the reducer 6 is made integral with an associated transverse fixing stud 13 by means of screw means 14.

[0049] The reducer 6 is thus integral with the body of the compressor 10, so as to maintain the electrical machine 3 on said compressor 10 on the side of the reducer 6.

[0050] The vehicle further comprises a second support 7 of the electric machine 3 on the side of the reducer 6 comprising a fixing crosspiece 8 extending in the YZ plane and comprising a distal end 8a secured to the side member 2 and a proximal end 8b secured to a support plate 9.

[0051] The second support 7 is also called the reducer side support.

[0052] The support plate 9 has the shape of a plate and comprises three orifices 9a allowing the threaded ends of the vertical fixing studs 11 of the compressor 10 to pass through.

[0053] Alternatively, a structural inversion could be provided in which the vertical fixing studs 11 comprise a thread intended to cooperate with a screw inserted through the corresponding orifice 9a of the support plate 9.

[0054] The particular attachment interface of the compressor on the second support of the electric machine makes it possible to position the air conditioning compressor on the side of the reducer of said electric machine without degrading the vibration performance of said electric machine while benefiting from the spacing of the attachment points of the compressor on the reducer.

[0055] Furthermore, the air conditioning compressor acts as a support part for the electric machine on the reducer side.

Claims

Claims

1. Motor vehicle (1) comprising at least one electric machine (3) extending along a transverse axis (Y) between two longitudinal side members (2), said electric machine (3) comprising a drive shaft secured to a reduction gear (6), the motor vehicle further comprising a compressor (10) of an air conditioning system extending along a longitudinal axis (X) perpendicular to the transverse axis (Y), characterized in that it comprises a support (7) for the electric machine (3) on the side of the reduction gear (6) secured to the side member (2) on the reduction gear side (6) and in that the compressor (10) comprises at least two vertical fixing studs (11) extending vertically from the external cylindrical surface (10a) of the compressor (10) and each configured to cooperate with screw means (12) for fixing to the support (7) on the reduction gear side (6).

2. Vehicle (1) according to claim 1, in which the support (7) of the electric machine (3) on the side of the reducer (6) comprises a fixing crosspiece (8) extending in the plane (YZ) comprising the transverse axis (Y) and the vertical axis (Z) and comprising a distal end (8a) secured to the longitudinal member (2) on the side of the reducer (6) and a proximal end (8b) secured to a support plate (9)

3. Vehicle (1) according to claim 2, in which the support plate (9) comprises at least two orifices (9a) cooperating with the screw means (12) for fixing the compressor (10) on the support (7) on the reducer side (6).

4. Vehicle (1) according to any one of the preceding claims, in which each vertical fixing stud (11) of the compressor (10) comprises a threaded end intended to cooperate with the screw means (12).

5. Vehicle (1) according to any one of the preceding claims, in which the reducer (6) comprises three fixing lugs (6a) extending along the transverse axis (Y) towards the side member (2) on the side opposite the electric machine (3).

6. Vehicle (1) according to claim 5, wherein the fixing lugs (6a) of the reducer (6) are regularly distributed around the periphery of said reducer (6) and form an angle of 120° relative to each other.

7. Vehicle (1) according to claim 5 or 6, wherein the compressor (10) further comprises at least three transverse fixing studs (13) extend transversely from the body of the compressor (10) and each configured to cooperate with a fixing lug (6a) of the reducer (6) for fixing said reducer (6) on the compressor (10).

8. A vehicle (1) according to claim 7, wherein two of the transverse fixing studs (13) of the compressor (10) extend transversely from the outer cylindrical surface (10a) of the compressor and one of the transverse fixing studs (13) extends from a side surface (10b) of the compressor (10).

9. Vehicle (1) according to claim 7 or 8, in which each transverse fixing stud (13) of the compressor (10) has a cylindrical shape comprising a bore configured to receive the end of a corresponding fixing lug (6a) of the reducer (6), said fixing lugs (6a) of the reducer (6) are made integral with an associated transverse fixing stud (13) of the compressor (10) by means of screw means (14).

10. Vehicle (1) according to any one of the preceding claims, in which the electric machine (3) comprises a casing (3a) extending along the transverse axis (Y) and delimited transversely by a first end (3b) on the side opposite the reducer (6) and a second end (3c) on the side of the reducer (6), said first end (3b) of the electric machine (3) being fixed on a first support (4) on the side of the suspension (5) of the vehicle.

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