Support for a motor of a heating, ventilation and / or air conditioning device for a motor vehicle

Abstract

The motor support (16) comprises an inner ring (20) able to house the motor elements and an outer ring (22) able to be fastened to the casing, and separation means (24) between the two coaxial rings (20; 22) comprising a plurality of pads (46) of elastomeric material interposed between the inner ring (20) and the outer ring (22). Each pad (46) is substantially "H" shaped. The two arms (46int, 46ext; 461, 462) of the "H" are separated by a distance B. Each arm (46int, 46ext; 461, 462) has a width D measured in the radial direction. The web (46a) of the "H" has a width A measured in the orthogonal radial direction. The ratio A / B is greater than or equal to 1.4 and the ratio A / D is greater than or equal to 2.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation, and / or air conditioning systems for motor vehicles. More specifically, this invention relates to electric motor supports for such systems. Background Technology

[0002] Motor vehicles are currently equipped with heating, ventilation, and / or air conditioning systems capable of generating airflow. These systems also manage the temperature and distribution of the generated airflow within the vehicle interior. Such heating, ventilation, and / or air conditioning systems particularly include fans, which comprise fan impellers driven by an electric motor. The electric motors are, in particular, electronically switched electric motors controlled by a power module.

[0003] An electronically switched electric motor or brushless DC motor includes a rotor and a stator assembly, each of which carries an electromagnetic element. The interaction of these electromagnetic elements produces the motion of the rotor relative to the stator, and ultimately produces the motion of the fan impeller.

[0004] The electric motor is mounted in a heating, ventilation and / or vibration device via a motor support, which includes an inner ring configured to accommodate the electric motor stator and an outer ring capable of being directly or indirectly fixed to vehicle structural elements.

[0005] A separation element is positioned between the inner and outer rings. This separation element is designed to limit and preferably prevent the transmission of vibrations and / or stresses generated by the rotation of the electric motor from the inner ring to the outer ring. This limits the transmission of vibrations that might be felt by the vehicle's passengers to the heating, ventilation, and / or air conditioning systems.

[0006] The separating element allows for a significant amount of relative movement between the inner and outer rings, especially under vibration. In this case, repetitive motion can lead to damage to the separating element in the long run. Therefore, a challenge is to obtain a separating element that exhibits good mechanical durability while also allowing for the transmission of weak vibrations.

[0007] The purpose of this invention is to provide a motor support for heating, ventilation and / or air conditioning systems in motor vehicles that is simple to manufacture and does not exhibit at least some of the disadvantages of existing supports. Summary of the Invention

[0008] Therefore, one subject of the present invention is a motor support member, particularly for a motor fan unit of a vehicle ventilation system, comprising:

[0009] Two coaxial rings: an inner ring that houses one or more components of the motor, and an outer ring that is fixed to the housing forming the structural components.

[0010] A separating device for separating two coaxial rings and comprising a plurality of blocks made of an elastic material and positioned between an inner ring and an outer ring, each block being substantially H-shaped, the two arms of the H being separated by a distance B, each arm having a width D measured in the radial direction, and the web of the H having a width A measured in the orthogonal radial direction, wherein the ratio A / B is greater than or equal to 1.4 and the ratio A / D is greater than or equal to 2.

[0011] Surprisingly, such a defined block can reinforce the separation element to prevent premature degradation while maintaining a relatively low natural frequency, making it possible to limit noise inside the vehicle containing the motor support.

[0012] Preferably, the motor support includes one or more of the following features, individually or in combination:

[0013] - Each block has a thickness C measured along the common axis of the two rings, wherein the thickness C is greater than or equal to 10 mm, preferably greater than or equal to 14 mm, and / or less than 20 mm, preferably less than or equal to 16 mm, and / or

[0014] - Distance B is greater than or equal to 3mm and / or less than or equal to 6mm;

[0015] - Width A is greater than or equal to 4mm and / or less than or equal to 20mm;

[0016] The width D of the arm of -H is greater than or equal to 2mm and / or less than or equal to 5mm;

[0017] -H has a blind hole in its web, preferably located substantially at the center of the web and extending along the common axis of the two rings;

[0018] - Each block is flush with at least one of the two rings along the common axis of the two rings;

[0019] - The separation device includes an elastomeric ring extending between two rings, the elastomeric ring preferably being integrally formed with the block;

[0020] - An elastomer ring defines a toroidal surface whose radial direction is located between one of the inner or outer rings and the block on the other side;

[0021] - The hardness of elastomer materials is between 25 and 60 Shore hardness, especially approximately equal to 40 Shore hardness;

[0022] - The motor support includes at least one tilt limiting element that limits the tilt of the inner ring relative to the outer ring. The tilt limiting element includes a finger that extends from a first of the two rings and is received in a receiving portion formed in a second of the two rings. Two axial end stops are formed in the receiving portion to limit the movement of the finger in the receiving portion relative to the common axis of the two rings.

[0023] - The motor support consists of two blocks arranged at an angle, symmetrically located on each side of each finger;

[0024] - A device for limiting the relative movement of one of two rings relative to the other in a plane perpendicular to the common axis of the two rings, comprising at least one radial end stop fixed to one of the two rings, having a radial clearance between the end stop and the other of the two rings;

[0025] - At least one radial end stop extends between the inner ring and the outer ring, and the at least one radial end stop preferably has an inner curvature complementary to the curvature of the inner ring and / or an outer curvature complementary to the curvature of the outer ring;

[0026] - The inner and / or outer rings are covered with an elastic material, facing at least one radial end stop;

[0027] - The motor support includes at least two radial end stops that are opposite each other relative to the center of the ring, preferably at least three radial end stops that are evenly angularly distributed around the common axis of the two rings;

[0028] - The radial clearance is approximately 1 mm;

[0029] - The motor support also includes means for limiting, preferably preventing, relative rotation of the rings about the common axis of the two rings;

[0030] - At least one axial end stop extends into the receiving portion;

[0031] - An elastic material is arranged between each of the finger and the two axial end stops and in contact with one of the finger and the two axial end stops. The elastic material is preferably compressed between each of the finger and the two axial end stops. More preferably, the elastic material still has a compression ratio of greater than or equal to 5% and / or less than or equal to 25%, and more preferably, it still has a compression ratio of substantially equal to 15%.

[0032] - The motor support includes an elastomer of equal thickness between each of the finger members and the two end stops;

[0033] - At least one axial end stop extends in a direction substantially perpendicular to the elongation direction of the finger;

[0034] - The motor support includes two axial end stops that extend into the receiving portion and are located on each side of the finger, with the two protruding axial end stops facing each other.

[0035] - Elastic material is overmolded onto the two opposite surfaces of the finger;

[0036] - The hardness of the elastic material on the surface of the finger is between 20 and 45 Shore hardness, especially approximately equal to 25 Shore hardness;

[0037] - The elastic material in contact with the finger and each of the two end stops are integrally formed with the elastomeric ring;

[0038] - The finger-shaped member has an H-shaped cross-section; and

[0039] - The two opposing surfaces of the finger-shaped stop facing the axial end are planar.

[0040] Another aspect of the invention describes a fan, particularly for ventilation equipment in vehicles, comprising an electric motor, especially a brushless electric motor, a fan impeller driven by the rotation of the electric motor, and a motor support as described above, wherein the motor, particularly the stator of the motor, is fixed to the inner ring of the motor support.

[0041] Another aspect of the invention describes a heating, ventilation and / or air conditioning device for a motor vehicle, comprising a fan in all the combinations described above. Attached Figure Description

[0042] Further features, details, and advantages will become clearer by reading the following description, which is illustrated in conjunction with the accompanying drawings.

[0043] Figure 1 This is a schematic side view of an example of a fan unit used in heating, ventilation and / or air conditioning systems for motor vehicles.

[0044] Figure 2 It is by Figure 1 A schematic perspective view of the assembly formed by the motor support and housing of the fan unit.

[0045] Figure 3 yes Figure 2 A schematic perspective view of a sub-assembly of the motor support.

[0046] Figure 4 yes Figure 3 A schematic side view showing the details of the child components.

[0047] Figure 5 It is used in Figure 2 and 3 A schematic perspective view of the bolt in the motor support.

[0048] Figure 6 Depicting Figure 3 Details of the child components.

[0049] Figure 7 schematically depicted Figure 6 Details.

[0050] Figure 8 Depicting Figure 3 Details of the first variant of the child component.

[0051] Figure 9 schematically depicted Figure 8 Details.

[0052] Figure 10 Depicting Figure 3 Details of the second variant of the child component.

[0053] Figure 11 schematically depicted Figure 10 Details.

[0054] Figure 12 Depicting Figure 3 Details of the third variant of the child component.

[0055] Figure 13 schematically depicted Figure 12 Details. Detailed Implementation

[0056] Figure 1 A schematic side view of a fan assembly 10 for a heating, ventilation, and / or air conditioning system for a motor vehicle is shown. In a conventional manner, such a heating, ventilation, and / or air conditioning system for a motor vehicle includes a ventilation circuit, a fan assembly 10 for moving air within the ventilation circuit, and means for heating and / or cooling the airflow initiated by the fan assembly 10.

[0057] like Figure 1 As shown, the fan assembly 10 mainly includes a fan impeller 12 and an electric motor (hidden here by a motor cover 14) for driving the fan impeller 12 to rotate about its axis A1. The electric motor is, for example, a brushless motor. The fan assembly 10 also includes a motor support 16, which allows the electric motor to be mounted on the support. In this particular case, the electric motor is connected to a deflector 18 of the motor support 16, the deflector 18 forming part of the ventilation circuit of the heating, ventilation, and / or air conditioning equipment.

[0058] The motor support 16 will be described in more detail below.

[0059] As shown in the figure, the motor support 16 mainly includes an inner ring 20, an outer ring 22, and a separation element 24 disposed between the inner ring 20 and the outer ring 22. The separation element 24 is designed to limit the transmission of vibration from one of the two rings 20, 22 to the other. The separation element 24 is formed here by an elastomer ring. For example, the elastomer material is SEBS (polystyrene-b-poly(ethylene-butene)-b-polystyrene). The separation ring 24 is, for example, overmolded onto the inner ring 20 and the outer ring 22. Thus, the separation ring 24 holds the inner ring 20 and the outer ring 22 together. The inner ring 20, the outer ring 22, and the separation ring 24 are coaxial, with the rotation axis A of the fan impeller 12 as a common axis.

[0060] The assembly formed by the inner ring 20, outer ring 22, and separator ring 24 is housed within the cavity of the deflector 18. The inner ring 20 is fixed to the stator of the motor (not visible here). The outer ring 22 is fixed to the deflector 18 here. A layer of elastomeric material may be placed between the outer ring 22 and the deflector 18.

[0061] According to the example shown in the figure, the inner ring 20 has a plurality of fingers 26. The fingers 26 extend radially outward from the outer surface of the inner ring 20. In this particular case, each finger 26 has an H-shaped cross-section, comprising two basic planar surfaces 261, 262 connected to each other by a web 263. Here, the planar surfaces 261, 262 are perpendicular to the common axis A1 of the rings 20, 22, 24. Here, each planar surface 261, 262 is covered by layers of elastomeric material 271, 272.

[0062] In the illustrated example, the inner ring 20 has three fingers 26. The fingers 26 are preferably evenly distributed at an angle around the axis A1 of the inner ring 20.

[0063] The outer ring 22 itself includes a plurality of receiving portions 28. Each receiving portion 28 is designed to receive a corresponding finger 26. Thus, the receiving portions 28 are open at least on the radially inner surface of the outer ring 22. In this particular case, the receiving portions 28 are entirely through, opening onto both the radially inner and radially outer surfaces of the outer ring 22. The receiving portions 28 are preferably evenly angularly distributed around the axis A1 of the outer ring 22.

[0064] The finger 26 is accommodated in the receiving portion 28 to limit the ability of the inner ring 20 to tilt relative to the outer ring 22. Tilting here refers to any movement of one of the rings 20, 22 relative to the other 20, 22 outside the common intermediate plane of the rings 20, 22, which is perpendicular to the direction of the common axis A1 of the two rings 20, 22.

[0065] In the illustrated example, the dimensions of the receiving portions 28 are such that there is a gap between the wall of each receiving portion 28 and the finger 26 housed therein. In particular, there is a gap in the orthogonal radial direction. The wall of each receiving portion 28 is covered here with an elastic material. Preferably, the elastomeric 30 layers covering the wall of each receiving portion 28 are integrally formed with the separation ring 24.

[0066] like Figure 4 More specifically, in each receiving portion 28, the finger 26 engages with two axial end stops 32, 34 to further restrict the axial movement of the finger 26 within the receiving portion 28. Here, the two axial end stops 32, 34 protrude from the wall of the receiving portion 28. The axial end stops referred to here are stops that restrict the movement of the rings 20, 22, 24 in the direction of the common axis A1.

[0067] In the example shown, the elastic material of one of the layers 271, 272 is in contact between one of the axial end stops 32, 34 and one of the planar surfaces 261, 262 of the finger 26. This limits the possible travel of the finger 26 in the axial direction A1 within the receiving portion 28. To further limit this axial travel, the elastic material of the layers 271, 272 present between the axial end stops 32, 34 and the planar surfaces 261, 262 is compressed. For example, the axial compression ratio of the elastic material of the layers 271, 272 present between the axial end stops 32, 34 and the planar surfaces 261, 262 is greater than or equal to 5% and / or less than or equal to 25%, preferably substantially equal to 15%. The axial compression ratios ε1, ε2 are defined as the ratios between the following:

[0068] - The thickness e1 of the elastomeric layer on the planar surfaces 261, 262 of the finger 26 before it is placed between the axial end stops 32, 34. 0 e2 0 The difference between the thicknesses e1 and e2 of the elastomeric layers on the planar surfaces 261 and 262 of the finger 26 after it is placed between the axial end stops 32 and 34; and

[0069] - Before placing the finger 26 between the axial end stops 32 and 34, the thickness e1 of the elastomeric layer on the planar surfaces 261 and 262 of the finger 26 is... 0 e2 0 :

[0070] [Mathematical Expression 1]

[0071]

[0072]

[0073] Therefore, the possible deformation of the elastomeric material allows for the restriction of vibration transmission from one of the two rings 20, 22 to the other. However, at the same time, the compression of the elastomeric material in layers 271, 272 does restrict the movement of the finger 26, and thus restricts the ability of the two rings 20, 22 to move relative to each other.

[0074] To achieve this, the elastic material forming layers 271 and 272 can be selected based on its hardness. In particular, this elastic material can have a Shore hardness greater than or equal to 25 and / or less than or equal to 60 Shore hardness.

[0075] On the one hand, thicknesses e1, e2 and / or on the other hand, e1 0 e2 0 Advantageously, they are substantially equal. This allows the finger 26 to be aligned between the two axial end stops 32, 34.

[0076] The elastic material of layers 271 and 272 can be advantageously overmolded onto the surfaces 261 and 262 of the fingers 26, particularly while overmolding the separation ring 24. Therefore, the elastic material remains in place relative to the fingers 26. This also makes it easier to install the inner ring 20 relative to the outer ring 22.

[0077] The first axial end stop is formed here by the sleeve 32 of the bolt 36. The bolt 36 also includes a generally planar base 38 from which the sleeve 32 extends along axis A2 when the bolt 36 is secured to the outer ring 22. A2 is intended to be parallel to the common axis A1 of the rings 20, 22, and 24. To provide this fixation, the base 38 has two openings 40 designed to fit snugly onto two complementary cylindrical protrusions formed on the outer ring 22. Furthermore, two recesses 42 are provided at the longitudinal end of the base 38. One of the two recesses 42 receives a complementary rib formed by the outer ring 22 to guide the installation of the bolt 36 on the outer ring 22. The sleeve 32 is snugly fitted into the bore of the outer ring 22 to extend into the receiving portion 28, thereby forming the first axial end stop 32. More specifically, the sleeve 32 extends from one wall of the receiving portion 28 toward the finger 26 received therein in the direction of the common axis A1 of the rings 20, 22, and 24.

[0078] The second axial end stop 34 is formed here by a deflector 18, which includes a protruding cylindrical protrusion through an opening in the outer ring 22 to extend from the opposite wall of the first axial end stop 32 into the receiving portion 28. The protruding cylinder also extends in a direction parallel to the common axis A1 of the rings 20, 22, and 24.

[0079] In addition, such as Figure 2 and 3Specifically shown, the separating ring 24 defines an annular groove 44 between the inner ring 20 and the outer ring 22. Within this groove 44, the separating ring 24 forms blocks 46. Thus, the blocks 46 are integrally formed with the separating ring 24. In this case, the separating ring 24 forms six blocks 46. These six blocks 46 form three pairs of blocks 46, which are distributed at a substantially uniform angle around the axis A1. Each pair of blocks 46 includes, for example, a block 46 located on each side of the finger 26.

[0080] The bulk block 46 is primarily designed to reinforce the separation ring 24, particularly in the direction of the common axis A1 of the rings 20 and 22, in order to reduce the risk of cracking in the separation ring 24. However, the corresponding increase in material (which enhances the stiffness of the separation ring 24) tends to increase the resonant frequency of the motor support 16, especially the separation ring 24. This increase in resonant frequency leads to a potential increase in noise inside the vehicle equipped with the motor support 16.

[0081] As a result, the shape of block 46 was chosen to allow the stiffness of the separation ring 24 to increase substantially in the direction of the common axis A1 of rings 22 and 24, while limiting the increase in the resonant frequency of the motor support 16. For this purpose, block 46 is essentially H-shaped. Strictly speaking, for example, as... Figure 6 As shown, the two arms 46int and 46ext are slightly bent, with the inner arm 46int (Lint) being slightly shorter than the outer arm 46ext (Lext). However, in reality, as... Figure 7 As shown, block 46 can be considered H-shaped, with two straight arms 461 and 462, whose length L is equal to the average of the lengths Lint and Lext of the inner arm 46int and the outer arm 46ext.

[0082] The two arms 46int and 46ext (461 and 462, respectively) of H are separated by a distance B and oriented in the radial direction of rings 20, 22, and 24. Each arm 46int and 46ext (461 and 462, respectively) of H has a width D measured in the radial direction. The web 46a of H has a width A measured in the orthogonal radial direction. The width A of the web 46a and the distance B between the two arms 46int and 46ext (461 and 462, respectively) of H make the ratio A / B greater than or equal to 1.4. Furthermore, the ratio A / D is greater than or equal to 2. Specifically, the inventors have found, surprisingly, that by satisfying these inequalities, the separating ring 24 can be strengthened while maintaining a relatively low resonant frequency, particularly below 75 Hz, preferably below 50 Hz.

[0083] The width A of the web of H 46 can be greater than or equal to 4 mm and / or less than or equal to 20 mm.

[0084] The distance B between arms 46int and 46ext (461 and 462 respectively) of H 46 can be greater than or equal to 3 mm and / or less than or equal to 6 mm.

[0085] The width D of the arms 46int and 46ext (461 and 462 respectively) of H 46 can be greater than or equal to 2 mm and / or less than or equal to 5 mm.

[0086] To further enhance the mechanical strength of the assembly, the block 46 is advantageously flush with the inner ring 20 and / or the outer ring 22 in the direction of the common axis A1 of the two rings. To achieve this, the thickness C of the block, measured in the direction of the common axis A1 of the rings 20, 22, 24, is preferably greater than or equal to 10 mm, preferably greater than or equal to 14 mm, and / or less than or equal to 20 mm, preferably less than or equal to 16 mm.

[0087] The block 46 can still be made of a polymer material, such as SEBS. The hardness of the polymer material forming the block 46 can be between 25 and 60 Shore hardness, specifically essentially equal to 40 Shore hardness. Using a substantially softer material allows for further limitation of the resonant frequency of the motor support 16.

[0088] The separating ring 24 also forms an annular surface 48, which is radially arranged between the inner ring 20 and the block 46. The annular surface 48, for example, substantially covers the entire radial outer surface of the inner ring 20.

[0089] The following reference Figures 6 to 13 The variation in the shape of block 46 is described in further detail.

[0090] exist Figure 6 and 7 In the example:

[0091] - The thickness C of the block 46 is, for example, between 10 and 20 mm, and in particular, is approximately equal to 14 mm;

[0092] - The width A of the web is, for example, between 3 and 6 mm, and in particular, approximately equal to 4.4 mm;

[0093] For example, the distance B between arms 46int and 46ext (461 and 462 respectively) of H is between 3mm and 6mm, and is essentially equal to 3mm.

[0094] For such a block, a separation ring 24 with a natural frequency of approximately 32Hz can be generated.

[0095] exist Figure 8 and 9 In the example:

[0096] - The thickness C of block 46 is, for example, between 10 and 20 mm, and in particular, is approximately equal to 16 mm;

[0097] - The width A of the web is, for example, between 6 and 10 mm, and in particular, is approximately equal to 8.8 mm;

[0098] The distance B between the arms 46int and 46ext (461 and 462 respectively) of -H is, for example, between 3mm and 6mm, and in particular, is approximately equal to 6mm.

[0099] For this geometry of block 46, when using a material with a hardness of approximately 25 Shore A, a separation ring 24 with a natural frequency of approximately 32 Hz can be produced. For the same geometry and a material with a hardness of approximately 40 Shore A, the natural frequency is approximately 47 Hz.

[0100] exist Figure 10 and 11 In the example:

[0101] - The thickness C of block 46 is, for example, between 10 and 20 mm, and in particular, is approximately equal to 16 mm;

[0102] - The width A of the web is, for example, between 6 and 10 mm, and in particular, is approximately equal to 8.8 mm;

[0103] The distance B between the arms 46int and 46ext (461 and 462 respectively) of -H is, for example, between 3mm and 6mm, and in particular, is approximately equal to 3mm.

[0104] For this geometry of block 46, when using a material with a hardness of approximately 25 Shore A, a separation ring 24 with a natural frequency of approximately 45 Hz can be produced. For the same geometry and a material with a hardness of approximately 40 Shore A, the natural frequency is approximately 67 Hz.

[0105] Finally, Figure 12 and 13 In the example:

[0106] - The thickness C of block 46 is, for example, between 10 and 20 mm, and in particular, is approximately equal to 16 mm;

[0107] - The width A of the web is, for example, between 10 and 20 mm, and in particular, basically equal to 12 mm;

[0108] The distance B between the arms 46int and 46ext (461 and 462 respectively) of -H is, for example, between 3mm and 6mm, and in particular, is approximately equal to 6mm.

[0109] It should be noted that the width A of the web 46a corresponds here to the sum of two lengths A1 and A2 measured orthogonally radially along the central arc of the web 46a on either side of the hole 50. Here, the two lengths A1 and A2 are substantially equal, such that the hole 50 is located substantially in the middle of the central arc of the web 46a. The hole 50 is advantageously a blind hole, so that it does not compromise the fluid seal of the motor support 16. The hole 50, in particular, makes the separation ring 24, especially the relatively large block 46, easier to mold. It should be noted here that the web 46a may have more than one hole 50, preferably a blind hole. The length A of the web 46a then corresponds to the sum of the lengths measured along the central arc of the web 46a on either side of each hole 50.

[0110] For this geometry of block 46, when using a material with a hardness of approximately 25 Shore A, a separation ring 24 with a natural frequency of approximately 35 Hz can be produced. For the same geometry and a material with a hardness of approximately 40 Shore A, the natural frequency is approximately 53 Hz.

[0111] This disclosure is not limited to the examples described above, but includes all variations and combinations that would be conceived by a person skilled in the art within the scope of the sought protection.

[0112] According to a variation of the first embodiment, a single axial end stop extends into the receiving portion 28. In this case, the finger-like member received in the receiving portion can be clamped between the protruding axial end stop on one side and the wall of the receiving portion opposite to the protruding axial end stop on the other side.

[0113] Furthermore, the axial end stop can be produced using a different device than that described in the examples above. For example, one and / or another axial end stop can be produced in the form of a boss on the wall of the receiving portion and extend toward the finger received in the receiving portion.

[0114] Similarly, in the illustrated example, the elastic material is present on the surface of the finger-shaped member facing the axial end stop. Alternatively or additionally, the elastic material may be disposed on the axial end stops, whether or not they protrude. However, contact between the two layers of elastomeric material is preferably avoided. Therefore, preferably, only one of the two contact surfaces is covered by the elastic material.

[0115] Furthermore, in the illustrated example, the inner ring forms a finger-like member housed within a receiving portion formed in the outer ring. However, a reverse configuration is conceivable, where the outer ring has a finger-like member radially oriented toward the inner ring and housed within a receiving portion formed in the inner ring.

[0116] It should also be noted that the separating element can take a different form than the separating ring.

[0117] The block can be different from the separation ring, and the separation ring and the block together form a separation device.

Claims

1. A motor support member (16), comprising: Two coaxial rings (20; 22) are an inner ring (20) capable of accommodating one or more components of the motor and an outer ring (22) capable of being fixed to a housing forming a structural component. A separating device (24) for separating two coaxial rings (20; 22) and comprising a plurality of blocks (46) made of an elastomeric material and positioned between the inner ring (20) and the outer ring (22), each block (46) being substantially H-shaped, the two arms (46int, 46ext; 461, 462) of the H being separated by a distance B, each arm (46int, 46ext; 461, 462) having a width D measured in the radial direction, the web (46a) of the H having a width A measured in the orthogonal radial direction, wherein the ratio A / B is greater than or equal to 1.4 and the ratio A / D is greater than or equal to 2.

2. The motor support member as claimed in claim 1, wherein: - Each block (46) has a thickness C measured in the direction of the common axis (A1) of the two coaxial rings (20; 22), which is greater than or equal to 10 mm and less than 20 mm, and / or - The distance B is greater than or equal to 3mm and less than or equal to 6mm.

3. The motor support member as described in claim 2, wherein, The thickness C is greater than or equal to 14 mm and less than or equal to 16 mm.

4. The motor support member as described in any one of claims 1 to 3, wherein, The width A is greater than or equal to 4 mm and less than or equal to 20 mm.

5. The motor support member as described in any one of claims 1 to 3, wherein, The width D of the arms (46int, 46ext; 461, 462) of H is greater than or equal to 2 mm and less than or equal to 5 mm.

6. The motor support member as described in any one of claims 1 to 3, wherein, The web (46a) of the H has blind holes (50).

7. The motor support member as described in claim 6, wherein, The blind hole (50) is located substantially at the center of the web (46a) and extends in the direction of the common axis (A1) of the two coaxial rings (20; 22).

8. The motor support member as described in any one of claims 1 to 3, wherein, Each block (46) is flush with at least one of the two coaxial rings (20; 22) in the direction of the common axis (A1) of the two coaxial rings (20; 22).

9. The motor support member as described in any one of claims 1 to 3, wherein, The separation device includes an elastomeric ring extending between the two coaxial rings (20; 22).

10. The motor support member as claimed in claim 9, wherein, The elastomeric ring is integral with the block (46).

11. The motor support member as claimed in claim 9, wherein, The elastomeric ring defines a ring surface (48) which is radially located between one of the inner ring (20) or the outer ring (22) on the one hand and the block (46) on the other hand.

12. The motor support member as described in any one of claims 1 to 3, wherein, The hardness of the elastomer material is between 25 and 60 Shore A.

13. The motor support as claimed in claim 12, wherein, The hardness of the elastomer material is approximately equal to 40 Shore hardness.

14. The motor support member as described in any one of claims 1 to 3, wherein, The motor support is used for the motor fan unit of the vehicle ventilation equipment.

15. A fan (10) comprising an electric motor, a fan impeller (12) driven by rotation of the electric motor, and a motor support (16) as described in any of the preceding claims, wherein the electric motor is fixed to the inner ring (20) of the motor support (16).

16. The fan (10) as claimed in claim 15, wherein, The fan (10) is used for ventilation in the vehicle.

17. The fan (10) as claimed in claim 15, wherein, The electric motor is a brushless electric motor.

18. The fan (10) as claimed in claim 15, wherein, The stator of the electric motor is fixed to the inner ring (20) of the motor support (16).

Images