Ventilation device for a motor vehicle cooling module

Abstract

The invention relates to a ventilation device (2) comprising: - a bladed member (4) comprising a casing (8) for protecting the blades (6) made up of a lower half-shell (8a) assembled to an upper half-shell (8b); - an electric motor (3) comprising a rotor from which a shaft (5) extends along the X-axis and rotating the bladed member (4); - a bearing (9) for guiding the shaft (5), supported by a cylindrical bearing surface (18) formed in the casing (8) upstream of the blades (6) and extending in a plane perpendicular to the X-axis, characterised in that the ventilation device includes means for holding the bearing (9) in position in the bearing surface (18), inserted between the bearing (9) and the bearing surface (18), only these holding means being in contact with the external ring (9a) of the bearing (9), the holding means absorbing any dimensional variation of the bearing surface (18).

Description

[0001] VENTILATION DEVICE FOR MOTOR VEHICLE COOLING MODULE

[0002] Technical field of the invention

[0003] The invention relates to a ventilation device for a cooling module, for example for a motor vehicle, in particular an electric vehicle.

[0004] Technical background

[0005] A cooling module (or heat exchange module) of a motor vehicle conventionally comprises at least one heat exchanger and a ventilation device adapted to generate an air flow in contact with the heat exchanger, when the vehicle is stationary or at low driving speed.

[0006] In motor vehicles with conventional combustion engines, the heat exchanger is placed opposite at least two cooling bays, formed in the front face of the body of the motor vehicle. A first cooling bay is located above the bumper while a second bay is located below the bumper. Such a configuration is preferred because the combustion engine must also be supplied with air, the engine air intake being conventionally located in the airflow passage passing through the upper cooling bay.

[0007] However, electric vehicles are preferably equipped with only cooling bays located under the bumper, more preferably with a single cooling bay located under the bumper.

[0008] Indeed, the electric motor does not need to be supplied with air. And the reduced number of cooling bays improves the aerodynamic characteristics of the electric vehicle. This also results in a longer range and higher top speed for the vehicle.

[0009] To accommodate a smaller number of cooling bays, it is particularly appropriate to use a tangential blade unit to generate an air path to the cooling module.

[0010] This tangential bladed component is rotated by the electric motor via a shaft. This shaft is precisely positioned relative to the bladed component, in particular via a bearing mounted in a cylindrical bearing provided for this purpose in the housing of the bladed component. The bore of the bearing must be very precise, of the order of 1 / 100mm, in order to perfectly tighten the bearing and ensure its positioning is ideal for correctly guiding the shaft.

[0011] However, the material used to manufacture the casing is plastic, and it does not allow for precision of this order. In addition, plastic tends to deform and expand over time and depending on the surrounding temperature.

[0012] In addition, the housing is generally formed by two half-shells which together form a cylindrical bearing surface. Thus, there is a risk of not controlling the cylindrical shape of the bearing surface, which would cause play between the bearing surface and the bearing. However, movement of the bearing in the bearing surface can cause wear, misalignment, or noise when the shaft rotates.

[0013] The present invention aims to improve the ventilation device of an electric motor vehicle, by proposing an innovative solution for placing the bearing in the optimal position in the bearing housing and maintaining it in the bearing housing, despite the dimensional variations of the plastic half-shells during assembly and their deformations and expansions over time, and this whatever the temperature conditions.

[0014] Summary of the invention

[0015] The present invention relates to a ventilation device extending in an axial direction X and comprising:

[0016] - a bladed member comprising a blade protection casing composed of a lower half-shell assembled to an upper half-shell;

[0017] - an electric motor comprising a rotor from which a shaft extends along the X axis and driving said bladed member in rotation;

[0018] - a shaft guide bearing having an outer ring supported by a cylindrical bearing surface formed in the casing upstream of the blades and extending in a plane perpendicular to the X axis, this bearing surface being composed of a semi-cylindrical lower part formed in the lower half-shell and a semi-cylindrical upper part formed in the upper half-shell. This device is mainly characterized in that it comprises means for holding the bearing in position in the bearing surface inserted between the bearing and the bearing surface, only these holding means being in contact with the outer ring of the bearing, the holding means absorbing any dimensional variation of the lower part and the upper part of the bearing surface.

[0019] The main idea of ​​this invention is to add holding means between the outer ring of the bearing and the seat. Thus, it is no longer the seat that is in contact with the bearing, but it is the holding means that are in contact with the bearing. There are therefore one or more intermediate parts, the function of which is to firmly hold the bearing in position in the seat, even in the presence of possible play between the bearing and the seat. Such play may be due to dimensional variations during the manufacture of the two half-shells, or to the long-term deformation and expansion of the plastic forming the two half-shells, these deformations sometimes appearing because of temperature variations in the environment of the bladed member.

[0020] These support means therefore make it possible to absorb dimensional variations and deformations of the half-shells, and this over the long term.

[0021] The retaining means compress the bearing, to tighten it tightly, and eliminate any possible play. Since there is no more play, there is therefore no more relative movement between the bearing and the seat, no more wear, and no more noise.

[0022] The life of the ventilation device is thus extended, and maintenance operations to reposition the shaft, or to replace the half-shells, are reduced.

[0023] According to the different embodiments of the invention, which may be taken together or separately:

[0024] - each part of the span has a housing provided to accommodate said holding means.

[0025] - said holding means consist of at least one elastic band, of the elastomer type, inserted between the outer ring of the bearing and the seat, and being put into compression after closing the housing. the holding means consist of a lower band positioned in a housing provided in the lower part of the seat, and an upper band positioned in a housing provided in the upper part of the seat. - each band has a central zone positioned in a rounded zone of the housing so as to surround half the circumference of the bearing.

[0026] - each strip has two end tabs extending on either side of the central zone and positioned in flat zones of the housing oriented radially relative to the shaft, the end tabs of the upper strip bearing against the end tabs of the lower strip after closing the casing.

[0027] - for each strip, the end tabs have identical lengths, the two strips being identical.

[0028] - for each strip, the end tabs have different lengths, the two strips being identical.

[0029] - each strip is provided with at least one positioning pin which fits into an orifice provided for this purpose in the span, or conversely each span is provided with at least one positioning pin which fits into an orifice provided for this purpose in the strip.

[0030] - each strip has at least one zone of excess thickness resting on the external surface of the bearing.

[0031] The invention also relates to a method for installing a means for holding a bearing in a ventilation device as described previously, characterized in that it has the following steps: inserting a lower strip into a housing in the lower part of the bearing surface of the lower half-shell, and inserting an upper strip into a housing in the upper part of the bearing surface of the upper half-shell;

[0032] - insertion of the bearing inside the bearing;

[0033] - positioning of the half-shells opposite each other;

[0034] - detection of the strips by means of a first sensor capturing the longest end leg of the upper strip and a second sensor capturing the longest end leg of the lower strip;

[0035] - closing the casing by assembling the two half-shells with compression of the bands against the external ring of the bearing.

[0036] Finally, the invention relates to a cooling module for a motor vehicle, comprising a ventilation device as described previously, and at least one heat exchanger placed in the path of the air generated by the ventilation device.

[0037] Brief description of the figures

[0038] Other characteristics and advantages of the invention will appear during the reading of the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:

[0039] Figure 1 is a perspective view of a cooling module for an electric motor vehicle;

[0040] Figure 2 is a perspective and partially exploded detail view of a ventilation device of the cooling module;

[0041] Figure 3 is an exploded perspective view of the mounting of a means for holding a bearing in a lower portion of the bearing surface of the ventilation device;

[0042] Figure 4 is a perspective view of the means for holding a bearing in position in a bearing of the ventilation device according to Figure 3;

[0043] Figure 5 is a perspective view of a means for holding a bearing in position in an upper part of the bearing surface of the ventilation device;

[0044] Figure 6 is a sectional view of the bearing positioned and held within the range of the ventilation device with the holding means;

[0045] Figure 7 shows several possible configurations of bearing holding means;

[0046] Figure 8 illustrates a first possible configuration for detecting the correct positioning of the holding means in the half-shells;

[0047] Figure 9 illustrates a second possible configuration for detecting the correct positioning of the holding means in the half-shells;

[0048] Figure 10 illustrates a third possible configuration for detecting the correct positioning of the holding means in the half-shells.

[0049] Detailed description of the invention

[0050] In the remainder of the description, elements having an identical structure or similar functions will be designated by the same references.

[0051] In the remainder of the description, axial and radial orientations will be adopted in a non-limiting manner - and without reference to Earth's gravity. By convention, the "axial" direction corresponds to that of the main extension of the ventilation device illustrated by the X axis in Figure 1, and the "radial" direction is orthogonal to the axial direction.

[0052] Figure 1 describes an example of application of the invention, in particular a cooling module 1 of a motor vehicle, in particular with an electric motor. As illustrated in this figure 1, the cooling module 1 comprises a heat exchanger 20 as well as a ventilation device 2 according to an example embodiment of the invention. This ventilation device 2 extends axially along the axis X and comprises an electric motor 3 associated with a bladed member 4, the latter generating an air path towards the heat exchanger 20.

[0053] Figure 2 shows more precisely the connection between the electric motor 3 and the bladed member 4. In particular, in this figure 2 we see a shaft 5 extending from the rotor of the motor 3 and driving the bladed member 4 in rotation.

[0054] The blades 6 are oriented tangentially to the X axis which corresponds to the axis of rotation of the bladed member 4.

[0055] To protect the blades, the ventilation device 2 comprises a protective casing 8 composed of a lower half-shell 8a and an upper half-shell 8b. The half-shells 8a, 8b are exploded in this figure 2 to better visualize the connection between the engine 3 and the bladed member 8.

[0056] The half-shells 8a, 8b are capable of being fitted into one another to close the casing 8. The lower half-shell 8a acts as a support, and the upper half-shell 8b acts as a cover.

[0057] To correctly position the shaft 5 between the rotor and the blade member 4, the ventilation device 2 comprises a bearing 9 arranged in a cylindrical bearing surface 18 of the casing 8 provided for this purpose.

[0058] More precisely, the cylindrical bearing surface 18 is broken down into a semi-cylindrical lower part 18a provided on the lower half-shell 8a, and a semi-cylindrical upper part 18b provided on the upper half-shell 8b. Thus, when the two half-shells 8a, 8b are assembled, a total cylindrical bearing surface 18 is obtained.

[0059] As illustrated in Figures 3 to 5, each half-shell 8a, 8b comprises a side wall 7 extending in a plane perpendicular to the axis X and arranged opposite the engine 3. The side wall 7 is delimited in part by a joining edge 10. When the casing 8 is closed, the two joining edges 10 are positioned against each other.

[0060] The joining edge 10 of the lower half-shell 8a is interrupted by the lower part 18a of the span 18, and the joining edge 10 of the upper half-shell 8b is interrupted by the upper part 18b of the span 18.

[0061] Concretely, this amounts to cutting each junction edge 10 with a semi-cylindrical opening extending into the side wall 7.

[0062] The two semi-cylindrical openings arranged opposite each other after closing the casing 8 form the bearing surface 18 accommodating the bearing 9.

[0063] The half-shells 8a, 8b are made of plastic material, by any known technique, such as plastic injection, or molding, or other.

[0064] There may be dimensional variations from one half-shell to the other, causing play between the bearing 9 and the bearing surface 18 after the casing 8 has been closed.

[0065] There may also be deformations of the half-shells 8a, 8b in the medium and long term, following the forces applied by the shaft 5 to the bearing 9 or following temperature variations in the immediate environment of the ventilation device 2. These deformations also induce play between the bearing 9 and the bearing surface 18.

[0066] In order to avoid any movement of the bearing 9 within the bearing surface 18 due to possible play for the reasons indicated above, the invention provides for adding means for holding the bearing 9 in the bearing surface 18.

[0067] Figure 3 shows holding means, in this case an elastic band 13, of the elastomer type, which is inserted between the bearing 9 and the lower part 18a of the bearing surface 18.

[0068] In the example presented here, there is a lower strip 13 which is inserted into the lower part 18a of the span 18 at the level of the lower half-shell 8a, and an upper strip 13 which is inserted into the upper part 18b of the span 18 at the level of the upper half-shell 8b.

[0069] A variant with a single longer strip 13 which is inserted into the two parts of the bearing surface 18 is part of the scope of the present invention, and is notably illustrated in figure 7 diagram E. When the casing 8 is closed, the strips 13 are compressed against the bearing 9 and ensure that the bearing 9 is held in position.

[0070] This elastic band 13, due to its flexibility and its capacity to compress, makes it possible to absorb any play that may exist between the bearing 9 and the bearing surface 18.

[0071] Preferably, each bearing part 18 has a housing 11 provided to accommodate a strip 13.

[0072] Such a housing 1 1 is well illustrated in figure 3.

[0073] This housing 1 1 consists of a semi-cylindrical zone 1 1 a, therefore rounded, intended to surround half of the bearing 9.

[0074] The strip 13 intended to be housed in this housing 11 has a profile similar to that of the housing 11, in this case a central zone 14 being placed in the rounded zone 11a of the housing 11.

[0075] The strip 13 may be completely flat before being placed in position, where it may be preformed with its central zone 14 already formed into a rounded shape, in this case a half-moon.

[0076] Advantageously, to correctly position the strip 13 in the housing 11, the rounded zone 11a of the housing 11 is extended on either side by two flat zones 11b extending into the joining edge 10.

[0077] Similarly, the strip 13 comprises two end tabs 15 extending on either side of the central zone 14 and coming to be positioned in the two flat zones 11b of the housing 11. Thus the strip 13 is well centered in the housing 11.

[0078] The strip 1 3 has a length and a width allowing it to be fully inserted inside the housing 1 1 in a tight manner, so that it holds correctly in place.

[0079] Optionally, to assist with installation, the strip 13 includes positioning pins 16 provided under the end tabs 15, and capable of penetrating inside orifices 12 provided for this purpose in the flat areas 11b of the housing 11.

[0080] Or conversely, each bearing surface is provided with at least one positioning pin inserted into an orifice provided for this purpose in the strip (13). This configuration falls within the scope of the present invention, even if it is not shown.

[0081] This cooperation between the pin and the orifice makes it possible to make the strip 13 captive during its handling on the production line, because it is held in position.

[0082] According to another option falling within the scope of the present invention, instead of the pins and the holes, each bearing surface could be provided with a bead whose function is to hold the strip in position.

[0083] Figure 4 shows the strip 13 placed in its housing 11.

[0084] Preferably, the strip 13 has a thickness slightly greater than the depth of the housing 11, so that it protrudes slightly from the bearing surface 18, in order to ensure that the outer ring 9a of the bearing 9 is indeed supported on the strip 13 and not on the bearing surface 18 outside the housing 11.

[0085] In fact, only the strip 1 3 is in support against the bearing 9, there must be no friction with other parts of the half-shell 8a, 8b.

[0086] To reduce the compressive force of the band 13 on the outer ring 9a of the bearing 9 when closing the casing 8, it is possible to provide a band

[0087] 13 which has a thickness equivalent to the depth of the housing 11, so that it is flush with the bearing surface 18 in general and flush with the joining edge 10, and which has one or more zones of excess thickness 17 which then protrude from the bearing surface 18, as illustrated in figures 3 and 4. These zones of excess thickness 17 are located at the level of the central zone

[0088] 14 of the strip 1 3. In this case the bearing 9 is supported only on the areas of excess thickness 17 of the strip 13.

[0089] Figure 5 shows the positioning of a strip 13 in the upper half-shell 8b of the casing 8. The housing 11 of the upper half-shell 8b is identical to that described for the lower half-shell 8a. And the strip 13 is identical to that described for figures 3 and 4 of the lower half-shell 8a. Figure 6 shows the bearing 9 placed in position in the bearing surface 18 and held firmly by an upper strip 13 and a lower strip 13 as described in figures 3 to 5. The casing 8 is closed.

[0090] The end tabs 15 of the lower strip 13 are in contact with the tabs

[0091] 15 end of the upper band 13. The bearing 9 conventionally comprises an outer ring 9a, an inner ring 9b, and rolling elements 9c inserted in a cage between the two rings 9a, 9b.

[0092] The shaft 5 is tightly mounted in the inner ring 9b of the bearing 9.

[0093] The outer ring 9a of the bearing 9 is crushed by the excess thickness zones 17 of the lower and upper bands 13.

[0094] According to another embodiment which is not shown, strip 13 has a thickness equivalent to the depth of the housing 11, so that it is generally flush with the bearing surface 18 and flush with the joining edge.

[0095] 10, but with a width of the housing 11 and of the strip 13 much greater than the width of the bearing 9 and the bearing 9 well centered on the strip 13, so that the bearing 9 has no part covering the bearing surface 18 outside the housing

[0096] 1 1 .

[0097] Generally, the bands 13 are designed in a material which retains its elastic properties in the long term, which have a sticky effect in contact with the outer ring 9a of the bearing 9, and which is not sensitive to temperature variations which may exist in the environment of the ventilation device 2.

[0098] Preferably, this material is an EPDM elastomer.

[0099] Figure 7 illustrates several possible embodiments of a strip 13 according to the invention.

[0100] In diagram A, the strip 13 has a semi-circular rounded central area 14 and two flat end tabs 15.

[0101] In diagram B, the strip 13 has a semi-circular rounded central area 14 and two flat end tabs 15. Each tab 15 is provided with a positioning pin 16.

[0102] In diagram C, the strip 13 has a semi-circular rounded central area 14 and two flat end tabs 15. The rounded central area 14 is provided with a positioning pin 16.

[0103] In diagram D, the strip 13 has a semi-circular rounded central area 14 and two flat end tabs 15 having different lengths. There is therefore a short tab 15a, and a long tab 15b. One or more positioning pins 16 can be added to the tabs 15 or to the rounded central area 14. In diagram E, the strip 13 has a circular rounded central area 14 and two flat end tabs 15 of the same length capable of being in contact with each other after closing the casing 8.

[0104] In the case of diagrams A to D, two strips 13 are required to ensure the support of the bearing 9.

[0105] In the context of diagram E, a single strip 1 3 is sufficient to ensure the maintenance of the bearing 9.

[0106] Figure 8 illustrates a method for detecting the strips 13 in order to ensure that they are correctly placed in the housings 11 of the two half-shells 8a, 8b before closing the casing 8.

[0107] This method applies particularly in the case of strips 13 having a long leg 15b and a short leg 15a as illustrated in figure 7 diagram D.

[0108] In this case, a first sensor C1 makes it possible to capture the longest leg 15b of the upper strip 13 normally placed in the upper half-shell 8b. And a second sensor C2 makes it possible to capture the longest leg 15b of the lower strip 13 normally placed in the lower half-shell 8a.

[0109] It will be noted that the two strips 13 are identical and are simply turned over because they are positioned opposite each other, in the half-shells 8a, 8b.

[0110] Using two identical 13 strips is practical from a manufacturing and process point of view.

[0111] If one of the sensors does not detect any legs 15b, this means that a strip 13 has been forgotten to be positioned in a half-shell 8a, 8b. These sensors therefore make it possible to ensure quality monitoring during the assembly of the ventilation device 2.

[0112] The installation of the means of maintaining the bearing 9 in the ventilation device 2 comprises the following steps:

[0113] -insertion of a lower strip 13 into a housing 11 of the lower part 18a of the span 18 of the lower half-shell 8a, and insertion of an upper strip 13 into a housing 11 of the upper part 18b of the span 18 of the upper half-shell 8b;

[0114] -positioning of the bearing 9 between the two parts 18a, 18b of the bearing surface 18;

[0115] -positioning of the half-shells 8a, 8b opposite each other; -detection of the strips 13 by means of a sensor C1 capturing the longest end tab 15b of the upper strip 13 and a sensor C2 capturing the longest end tab 15b of the lower strip 13;

[0116] - closing of the casing 8 by assembling the two half-shells 8a, 8b with compression of the bands 13 against the external ring of the bearing 9.

[0117] Holes 21 are provided in the spans 18a, 18b, in order to clear the passage in the scanning zones of the sensors. Thus, the first obstacle detected by the sensors C1 and C2 will be the strip 13.

[0118] Preferably, the diameter of the orifices 21 is at least 5 mm.

[0119] Figure 9 reproduces the elements of Figure 8. In addition, there are two sensors C3 and C4, capable of capturing the short legs 15a of the lower and upper strips 13.

[0120] In this case, two additional orifices 21 are provided in the bearing surfaces 18a, 18b, in order to be able to clear the passage in the scanning zones of the sensors C3 and C4.

[0121] Holes 22 are also provided in the long legs 15b at the level of the capture zone of the sensors C2 and C4, so that they can capture the short legs 15a through the long legs 15b if necessary. This is particularly the case for the short leg 15a of the lower strip 13, which is captured by the sensor D3 through the hole 22 of the long leg 15b of the upper strip 13.

[0122] All long legs 1 5b are provided with such a hole 22, so that the strips can be used as both lower strip 13 and upper strip 13. The strips 13 are thus all identical.

[0123] Figure 10 shows another solution for capturing the correct positioning of the strips 13. In this case, each strip 13 comprises a transverse extension 23 at each lateral end.

[0124] In this figure 10, the upper tab 13 is shown in a solid line, and the lower tab 13 is shown in a broken line, for clarity.

[0125] Thus, the sensors C1 and C3 capture the transverse extensions 23 of the upper strip 13, and the sensors C2 and C4 capture the transverse extensions 23 of the lower strip 13. In this case, the strips 13 have legs 15 of the same length. The strips 13 are again identical, since it is sufficient to turn them over to have either the upper strip or the lower strip. The configurations shown in the figures cited are only possible examples, in no way limiting, of the invention which on the contrary encompasses the variants of shapes and designs within the reach 18 of those skilled in the art.

Claims

CLAIMS 1. Ventilation device (2) extending in an axial direction X and comprising: - a blade member (4) comprising a casing (8) for protecting the blades (6) composed of a lower half-shell (8a) assembled to an upper half-shell (8b); - an electric motor (3) comprising a rotor from which a shaft (5) extends along the X axis and driving said bladed member (4) in rotation; - a bearing (9) for guiding the shaft (5) having an outer ring (9a) supported by a cylindrical bearing surface (18) formed in the casing (8) upstream of the blades (6) and extending in a plane perpendicular to the axis X, this bearing surface (18) being composed of a semi-cylindrical lower part (18a) formed in the lower half-shell (8a) and a semi-cylindrical upper part (18b) formed in the upper half-shell (8b), characterized in that it comprises means for holding the bearing (9) in position in the bearing surface (18) inserted between the bearing (9) and the bearing surface (18), only these holding means being in contact with the outer ring (9a) of the bearing (9), the holding means absorbing any dimensional variation of the lower part (18a) and the upper part (18b) of the bearing surface (18).

2. Device according to the preceding claim, characterized in that each part (18a, 18b) of the bearing surface (18) has a housing (11) provided to accommodate said holding means.

3. Device according to one of the preceding claims, characterized in that said holding means consist of at least one elastic band (13), of the elastomer type, inserted between the external ring (9a) of the bearing (9) and the bearing surface (18), and being put into compression after closing of the casing (8).

4. Device according to the preceding claim, characterized in that the holding means consist of a lower strip (13) positioned in a housing (11) provided in the lower part (8a). of the span (18), and an upper strip (13) positioned in a housing (11) provided in the upper part (8b) of the span (18).

5. Device according to one of claims 3 to 4, characterized in that each strip (13) has a central zone (14) positioned in a rounded zone (11a) of the housing (11) so as to surround half of the circumference of the bearing (9).

6. Device according to the preceding claim, characterized in that each strip (13) comprises two end tabs (15) extending on either side of the central zone (14) and positioned in flat zones (11b) of the housing (11) oriented radially relative to the shaft (5), the end tabs (15) of the upper strip (13) bearing against the end tabs (15) of the lower strip (13) after closing the casing (8).

7. Device according to the preceding claim, characterized in that, for each strip (13), the end tabs (15) have identical lengths, the two strips (13) being identical.

8. Device according to one of claims 6 to 7, characterized in that, for each strip (13), the end tabs (15) have different lengths, the two strips (13) being identical.

9. Device according to one of claims 3 to 8, characterized in that each strip (13) is provided with at least one positioning pin (16) inserted into an orifice (12) provided for this purpose in the bearing surface (18), or conversely each bearing surface (18) is provided with at least one positioning pin inserted into an orifice provided for this purpose in the strip (13).

10. Device according to one of claims 3 to 8, characterized in that each strip (13) has at least one zone of excess thickness (17) bearing on the external bearing surface (9a) of the bearing (9). 1 1. Method for installing a means for holding a bearing (9) in a ventilation device (2) according to claim 8, characterized in that it has the following steps: - insertion of a lower strip (13) into a housing (11) of the lower part (18a) of the bearing surface (18) of the lower half-shell (8a), and insertion of an upper strip (13) into a housing (11) of the upper part of the bearing surface (18) of the upper half-shell (8b); - insertion of the bearing (9) inside the bearing surface (18); - positioning of the half-shells (8a, 8b) opposite each other; - detection of the strips (13) by means of a first sensor (C1) capturing the longest end tab (15b) of the upper strip (13) and a second sensor (C2) capturing the longest end tab (15b) of the lower strip (13); - closing the casing (8) by assembling the two half-shells (8a, 8b) with compression of the bands (13) against the external ring (9a) of the bearing (9).

12. Cooling module (1) for a motor vehicle, comprising a ventilation device (2) according to any one of claims 1 to 10, and at least one heat exchanger (20) placed in the path of the air generated by the ventilation device (2).

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